EP0297266B1 - Method and device for feeding packaging blanks into a folding device - Google Patents

Method and device for feeding packaging blanks into a folding device Download PDF

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Publication number
EP0297266B1
EP0297266B1 EP88107919A EP88107919A EP0297266B1 EP 0297266 B1 EP0297266 B1 EP 0297266B1 EP 88107919 A EP88107919 A EP 88107919A EP 88107919 A EP88107919 A EP 88107919A EP 0297266 B1 EP0297266 B1 EP 0297266B1
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EP
European Patent Office
Prior art keywords
knife
roller
knives
articles
web
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP88107919A
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German (de)
French (fr)
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EP0297266A3 (en
EP0297266A2 (en
Inventor
Heinz Focke
Jürgen Wach
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Focke and Co GmbH and Co KG
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Focke and Co GmbH and Co KG
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Publication of EP0297266A3 publication Critical patent/EP0297266A3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B57/00—Automatic control, checking, warning, or safety devices
    • B65B57/10—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of articles or materials to be packaged
    • B65B57/12—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of articles or materials to be packaged and operating to control, or stop, the feed of wrapping materials, containers, or packages

Definitions

  • the invention relates to a method for feeding blanks of packaging material to a folding unit, in particular to a folding turret, for wrapping objects or groups of objects, the blanks being separated from a continuous material web by cooperating knives, at least one knife being separated by a revolving knife roller is rotated, the feed of the blanks to the folding unit being controlled as a function of the feed of objects to be packaged in such a way that when the supply of objects is interrupted, the transfer of blanks to the folding unit is interrupted until objects to be packaged are fed back to the folding unit, and the drive for the continuous rotary movement of the knife roller is maintained and the material web is stopped when the supply of objects to be packed to the folding unit is interrupted. Furthermore, the invention relates to a device for producing and feeding blanks to a folding unit according to the preamble of claim 6.
  • Blanks for wrapping objects are common produced in the packaging machines by cutting off a material web and fed directly to a folding unit, in particular a folding turret. This applies above all to the processing of blanks from (plastic) foil material.
  • the blanks are usually separated from the material web by rotating knife rollers with separating knives and counter-knives with predominantly continuous conveying, and are also fed by circumferential conveying elements to a peripheral surface of the folding turret in the region of a pocket for receiving the objects.
  • the objects to be wrapped are inserted into a pocket of the folding turret in the radial direction in an insertion station with partial wrapping by the blank.
  • the feeding of the objects to be wrapped on the one hand and the separation and feeding of the blanks on the other hand are coordinated.
  • a packaging material feed mechanism to a folding unit is known.
  • the supply of the packaging material to the folding unit is controlled depending on the supply of objects to be packaged in such a way that when the supply of objects to be packaged is interrupted, the transfer of packaging material to the folding unit is interrupted until objects to be packaged are fed back to the folding unit.
  • the material web is withdrawn by rotating the drive of the material web in opposite directions, so that it comes out of the area of the knives.
  • the drive of the knife roller is maintained.
  • a major disadvantage of the known device lies in the complex mechanical construction which ensures that the material web is withdrawn from the area of the knives.
  • the cutting tools are subject to a high level of wear and tear since the Material web and maintaining drive of the cutting tools, the position of which remains in the cutting position.
  • the invention has for its object to avoid malfunctions in the functional sequence by coordinated interruption of the supply of blanks to the folding turret or the like in the event of a temporary interruption in the supply of objects to be wrapped.
  • the method according to the invention is characterized in that both knives are rotated by rotating knife rollers, that when the supply of objects to be packed to the folding unit is interrupted, the drive for the continuous rotational movement of both knife rollers is maintained and that the knife rollers and / or their Knives can be moved to an ineffective position.
  • the device according to the invention is further characterized by the features of claim 6.
  • the supply of objects to be wrapped to the folding turret is monitored in the invention, for. B. by an opto-electrical monitoring device. If the conveyance is interrupted, a corresponding signal is forwarded to units for conveying the material web, for separating and transporting the blanks, so that they do not separate any further blanks or convey them to the folding turret.
  • the material web for producing the blanks is stopped in an area which lies in front of the knife rollers in the direction of transport, with further blanks no longer being cut off.
  • a special feature is that the material web is conveyed by a trailing section beyond the action level of the knives (separating knife and counter knife) and then stopped.
  • the trailing section of the material web beyond the parting plane is shorter than the length of a blank and on the movement of the objects to be wrapped, on the conveying elements for the material web and the blanks, including the knife rollers, adjusted so that when the transport of the objects and thus the material web starts again, a blank is cut off at a moment which is coordinated with the movement of the objects and the folding turret.
  • the synchronous operation between the blank and the object to be wrapped is thereby immediately restored without loss of a blank or without a missing wrapping.
  • the knives of the knife rollers are brought into an ineffective position during the temporary stoppage of conveyance for the material web, so that a separation cut is not carried out despite the rotation of the knife rollers.
  • the device according to the invention for separating blanks from a web of material and feeding them to the circumferential surface of a folding turret comprises revolving conveying elements with the inclusion of revolving knife rollers, which are preceded by a pair of pulling rollers for the transport of the web of material, which can be switched off in a controlled manner if objects are not supplied, whereby Both knives are continuously assigned to rotating knife rollers and the knife rollers or their knives can be moved into a position which is ineffective for the cutting intervention by means of stationary, movable control members.
  • the separating knives which protrude over a circumferential surface of the knife rollers with a cutting edge, can be moved out of the cutting position by stationary, movable control members, in particular pivotable against spring loading.
  • the embodiment shown in the drawings deals with the packaging of stacks 10 of folded paper handkerchiefs in a blank 11 made of film material, for example PE film.
  • the objects to be wrapped that is to say stacks 10, are conveyed by a horizontal feed conveyor 12 fed to a folding turret 13 as a folding unit.
  • the feed conveyor 12 consists of a fixed bearing plate 14 for supporting the stack 10 and angular drivers 15, which are moved by chain drives 16 over the bearing plate 14.
  • the folding turret 13 is provided with a plurality of pockets 17 which are open on the radial outside, into each of which a stack 10, which is compressed to the dimensions of the pocket 17, is inserted in the radial direction, with the aid of a blank 11 which moves during the insertion movement U-shaped around the stack 10.
  • the feed conveyor 12 is located approximately in the horizontal center plane of the upright folding turret.
  • the stack 10 is inserted into the pockets 17 by means of a slide 18 that can be moved back and forth.
  • Feeder 12, folding turret 13 and other organs are expediently designed as described in DE patent application DE-A-37 01 273.8 (published on July 28. 1988) shown and described.
  • the blanks 11 are produced in a blanking station arranged upstream of the insertion station described above in the direction of rotation of the folding turret 13 and are applied in the region of a pocket 17 to the outer peripheral surface 19 of the folding turret 13.
  • the positioning of the blanks 11 on the peripheral surface 19 is such that a pocket 17 is covered in each case.
  • the blanks 11 are separated from a material web 21. This is drawn off from a bobbin (not shown) and fed to a separating unit for producing the blanks 11 via deflecting rollers 22, 23 with a double rocker 24.
  • the movable double rocker 24 serves to compensate of fluctuations in the feed of the material web 21, so that it always has a constant conveying speed in the area of the cutting of the blanks.
  • a photo eye 25 is attached in the area of the deflecting roller 22 for monitoring the exact running of the material web 21.
  • the material web runs over a (first) knife roller 26 with two knives, namely counter knives 27. These are arranged and designed in a conventional manner such that a cutting edge 28 projects slightly beyond the circumferential surface of the knife roller 26.
  • a second knife roller 29 Directly opposite the knife roller 26 is a second knife roller 29, which also has two diametrically opposed knives, namely separating knives 30.
  • the distance between the knife rollers 26 and 29 is selected such that a cutting edge 31 also protrudes beyond the circumference of the knife roller 29 the cutting knife 30 cooperates in the area of the smallest distance with a counter knife 27 in such a way that the material web 21 is cut through to form a blank 11.
  • the first knife roller 26 runs clockwise and the second knife roller 29 runs counterclockwise. In the area of a parting plane or parting point for the material web 21, parting knife 30 and counter knife 27 accordingly run in the same direction.
  • the material web 21 is brought up to the circumferential or lateral surface of the first knife roller 26.
  • This is provided with suction bores 32 opening on the circumferential surface, which are temporarily connected to a suction segment 33 of a fixed suction disk of known design when the knife roller 26 rotates.
  • the suction segment 33 is arranged or dimensioned such that the material web 21 in the area of the separating cut is sufficient for further transport is fixed to the circumference by the knife roller 26.
  • the suction segment 33 accordingly extends on both sides of the parting plane and then in the conveying direction of the knife roller up to an area in which the blank 11 is transferred to a subsequent conveyor, in the present case up to the area of a transfer conveyor 34.
  • the front area of the material web 21 and - after the separating cut - the blank 11 are accordingly held on the circumference of the knife roller 26 by suction air.
  • the transfer conveyor 34 is designed in the present embodiment as a belt conveyor.
  • a larger conveyor roller 35 receives the blanks 11 one after the other.
  • a smaller deflection roller 36 arranged at a distance therefrom is looped together with belts 37 together with the conveyor roller 35.
  • the straps 37 consist of several elastic bands lying next to one another, in particular O-rings. These run in circumferential grooves 38 of the conveying roller 35 and the deflecting roller 36.
  • the belts 37 which are arranged at axial distances from one another, are thereby essentially flush with the outer surface of the conveying roller 35 and the deflecting roller 36.
  • the blanks 11 can thereby bear against the outer surface of the conveying roller 35. This is provided in the area between the belts 37 with suction bores 39, which in turn come into contact with a stationary suction segment 40 during a partial area of the rotation and are thus acted upon by suction air.
  • the blanks 11 are conveyed through this along a section which is somewhat smaller than half the circumference of the knife roller 26 and then transferred to the immediately adjacent conveyor roller 35.
  • the suction hole holding the blank 11 or the material web 21 on the lateral surface of the knife roller 26 is connected to a fixed ventilation hole 41, so that the blank 11 or the material web 21 is no longer held in this area, but by the outer surface the conveying roller 35 is changed to the circumference of the conveying roller 35 as a result of the suction bore 39 which is effective in this area and is supplied with suction air.
  • the dimensions in the present case are such that the length of a blank 11 in the transport direction is greater than the contact area on the knife roller 26, so that the material web 21 already bears against the conveyor roller 35 before the separating cut.
  • the blank 11 is placed on the peripheral surface 19 of the folding turret 13 by the conveyor roller 35 and is held along a certain conveying path by the belts 37 which also cling to this peripheral surface 19.
  • the separation of the blanks 11 and conveyance to the folding turret 13 is dependent on the delivery of objects, namely stacks 10, such that, in the absence of stacks 10 in the area of the feeder 12, no blanks 11 are applied to the folding turret 13.
  • the feed of the stacks 10 in the area of the feed conveyor 12 is monitored, e.g. through optical sensors. If there is a gap in the feed of the stacks 10, the drive of the material web 21 is interrupted in a controlled manner.
  • the material web 21 is driven by a pair of pull rollers 42, 43 which are arranged upstream of the knife rollers 26, 29 in the conveying direction. These are stopped when stacks 10 are not supplied, but in such a way that the material web continues to convey a section of the material web, specifically over the separation point in the area of the knife rollers 26, 29.
  • This trailing section 44 is approximately a quarter of the circumference of the knife roller 26 (FIG. 3). In this position shown there, the material web 21 comes to a standstill.
  • This exact standstill position is achieved in that the pull rollers 42, 43 are driven by a servomotor 45 (stepper motor) which receives a stop impulse from the feed conveyor and then conveys the material web 21 further by the trailing section 44 described.
  • the transmission of the stop signal to the servomotor 45 is controlled in such a way that the promotion of the trailing section 44 always takes place after a separating cut.
  • the knife rollers 26, 29 and the transfer conveyor 34 - like the folding turret 13 - continue to move unchanged, namely continuously, after the material web 21 has stopped.
  • the knives are moved with each other apart from cutting engagement.
  • the separating knives 30 on the knife roller 29 are (temporarily) adjusted for this purpose.
  • the separating knives 30 are movably attached to the knife roller 29.
  • the knife roller 29 is provided on diagonally opposite sides with recesses 46 which are approximately triangular in cross section.
  • the separating knives 30 can be moved, namely pivoted, in these.
  • a radially inner end or edge region of the separating knife 30 is provided with a round thickening 47, namely cylindrical in the bearing region. This lies rotatably (slidingly) in a suitable, trough-shaped depression 48 of a side surface 49 of the recess 46.
  • the side surface 49 which is oriented approximately radially or parallel to an (imaginary) radial surface, also serves as a contact surface for the cutting knife 30 in the normal or cutting position .
  • the separating knife 30 is moved out of the cutting position by a slight pivoting movement about the axis of the bearing thickening 47, namely by rotating the same in the recess 48 (FIG. 3, upper separating knife 39).
  • This pivoting movement of the cutting knife 30 takes place against the load of a spring 50.
  • the spring sits on a bolt 51 directed transversely to the cutting knife 30, which passes through a bore 52 in the cutting knife 30 and is fastened to the side surface 49.
  • an actuator is mounted in the knife roller 29 adjacent to the side surface 49, namely a rotatable eccentric piece 53.
  • This is designed as a pivot pin flattened on one side, which can be rotated about an axis parallel to the axis of rotation of the knife roller 29.
  • an edge emerges from the plane of the side surface 49 and pivots the separating knife 30.
  • the separating knife lies against the eccentric piece 53 in the area of the flattening.
  • an actuating arm 54 is attached to the latter, namely at a free end projecting laterally from the knife roller 29.
  • This is provided at its free end with a feeler roller 55, which receives 54 for actuating the eccentric piece 53 and thus for pivoting the cutting knife 30 on a stationary, movable actuating member.
  • this consists of a curve segment 56 which can be moved into the working position (FIG. 3) or out of it by a pressure medium cylinder 57 (FIG. 2).
  • the cam segment 56 is designed such that the feeler roller 55 runs freely against a support surface 58 of the cam segment 56 when the knife roller 29 rotates.
  • the actuating arm 54 When moving further, the actuating arm 54 is increasingly pivoted until the cutting knife in question in the region of the separation point for the material web 21 30 is pivoted back sufficiently far. Accordingly, only very short, slight movements of the cutting knife take place exclusively in the area of the cutting point. After that, when the sensing roller 55 has left the area of the cam segment 56, the cutting knife 30 returns to the normal position.
  • the knife roller 26 is provided with a recess 59 adjacent to the counter knife 27, into which the disengaged separation knife 30 briefly enters, taking the material web 21 with it, but without cutting through it.
  • the transfer conveyor 34 runs in the present case at a slightly higher speed than the knife roller 26. This creates small gaps between the successive blanks 11.

Description

Die Erfindung betrifft ein Verfahren zum Zuführen von Zuschnitten aus Verpackungsmaterial zu einem Faltaggregat, insbesondere zu einem Faltrevolver, für die Einhüllung von Gegenständen bzw. Gruppen von Gegenständen, wobei die Zuschnitte durch zusammenwirkende Messer von einer fortlaufenden Materialbahn abgetrennt werden, wobei wenigstens ein Messer durch eine umlaufende Messerwalze drehend bewegt wird, wobei weiterhin die Zuführung der Zuschnitte zum Faltaggregat in Abhängigkeit von der Zuführung von zu verpackenden Gegenständen derart gesteuert wird, daß bei Unterbrechung der Zuführung von Gegenständen die Übergabe von Zuschnitten an das Faltaggregat so lange unterbrochen wird, bis zu verpackende Gegenstände dem Faltaggregat wieder zugeführt werden, und wobei weiterhin bei Unterbrechung der Zuführung von zu verpackenden Gegenständen zum Faltaggregat der Antrieb für die fortlaufende Drehbewegung der Messerwalze aurechterhalten und die Materialbahn angehalten wird. Weiterhin betrifft die Erfindung eine Vorrichtung zum Herstellen und Zuführen von Zuschnitten zu einem Faltaggregat gemäß dem Oberbegriff des Anspruchs 6.The invention relates to a method for feeding blanks of packaging material to a folding unit, in particular to a folding turret, for wrapping objects or groups of objects, the blanks being separated from a continuous material web by cooperating knives, at least one knife being separated by a revolving knife roller is rotated, the feed of the blanks to the folding unit being controlled as a function of the feed of objects to be packaged in such a way that when the supply of objects is interrupted, the transfer of blanks to the folding unit is interrupted until objects to be packaged are fed back to the folding unit, and the drive for the continuous rotary movement of the knife roller is maintained and the material web is stopped when the supply of objects to be packed to the folding unit is interrupted. Furthermore, the invention relates to a device for producing and feeding blanks to a folding unit according to the preamble of claim 6.

Zuschnitte für die Einhüllung von Gegenständen werden vielfach in den Verpackungsmaschinen durch Abtrennen von einer Materialbahn hergestellt und unmittelbar einem Faltaggregat, insbesondere einem Faltrevolver, zugeführt. Dies gilt vor allem für die Verarbeitung von Zuschnitten aus (Kunststoff-)Folienmaterial. Die Zuschnitte werden üblicherweise durch umlaufende Messerwalzen mit Trennmessern und Gegenmessern bei vorwiegend kontinuierlicher Förderung der Materialbahn von dieser abgetrennt und durch ebenfalls umlaufende Förderorgane einer Umfangsfläche des Faltrevolvers im Bereich einer Tasche zur Aufnahme der Gegenstände zugeführt. Die einzuhüllenden Gegenstände werden in einer Einschubstation in Radialrichtung in jeweils eine Tasche des Faltrevolvers eingeschoben unter Teilumhüllung durch den Zuschnitt. Die Zuführung der einzuhüllenden Gegenstände einerseits und die Abtrennung und Zuförderung der Zuschnitte andererseits sind aufeinander abgestimmt.Blanks for wrapping objects are common produced in the packaging machines by cutting off a material web and fed directly to a folding unit, in particular a folding turret. This applies above all to the processing of blanks from (plastic) foil material. The blanks are usually separated from the material web by rotating knife rollers with separating knives and counter-knives with predominantly continuous conveying, and are also fed by circumferential conveying elements to a peripheral surface of the folding turret in the region of a pocket for receiving the objects. The objects to be wrapped are inserted into a pocket of the folding turret in the radial direction in an insertion station with partial wrapping by the blank. The feeding of the objects to be wrapped on the one hand and the separation and feeding of the blanks on the other hand are coordinated.

Bei zeitweiliger Unterbrechung der Zuführung von Gegenständen zum Faltrevolver führt die nicht unterbrochene Herstellung von Zuschnitten und Anlieferung zum Faltrevolver zu beträchtlichen Störungen im Funktionsablauf.If the supply of objects to the folding turret is temporarily interrupted, the uninterrupted production of blanks and delivery to the folding turret lead to considerable malfunctions in the functional sequence.

Aus der US-A-3 269 085 ist ein Verpackungsmaterial-Zuführmechanismus zu einem Faltaggregat bekannt. Die Zuführung des Verpackungsmaterials zum Faltaggregat wird hierbei in Abhängigkeit von der Zuführung von zu verpackenden Gegenständen derart gesteuert, daß bei Unterbrechung der Zufuhr von zu verpackenden Gegenständen die Übergabe von Verpackungsmaterial zum Faltaggregat solange unterbrochen wird, bis dem Faltaggregat zu verpackende Gegenstände wieder zugeführt werden. Bei dem bekannten Verfahren bzw. der bekannten Vorrichtung wird die Materialbahn durch gegenläufige Drehbewegung des Antriebs der Materialbahn zurückgezogen, so daß sie aus dem Bereich der Messer gelangt. Der Antrieb der Messerwalze bleibt aufrechterhalten. Ein wesentlicher Nachteil der bekannten Vorrichtung liegt in der aufwendigen mechanischen Konstruktion, die das Rückziehen der Materialbahn aus dem Bereich der Messer gewährleistet. Weiterhin unterliegen die Schneidwerkzeuge einem hohen Verschleiß, da bei zurückgezogener Materialbahn und aufrechterhaltendem Antrieb der Schneidwerkzeuge die Stellung derselben in Schneidposition verbleibt.From US-A-3 269 085 a packaging material feed mechanism to a folding unit is known. The supply of the packaging material to the folding unit is controlled depending on the supply of objects to be packaged in such a way that when the supply of objects to be packaged is interrupted, the transfer of packaging material to the folding unit is interrupted until objects to be packaged are fed back to the folding unit. In the known method or the known device, the material web is withdrawn by rotating the drive of the material web in opposite directions, so that it comes out of the area of the knives. The drive of the knife roller is maintained. A major disadvantage of the known device lies in the complex mechanical construction which ensures that the material web is withdrawn from the area of the knives. Furthermore, the cutting tools are subject to a high level of wear and tear since the Material web and maintaining drive of the cutting tools, the position of which remains in the cutting position.

Der Erfindung liegt die Aufgabe zugrunde, Störungen im Funktionsablauf durch abgestimmte Unterbrechung der Zufuhr von Zuschnitten zum Faltrevolver oder dergleichen bei zeitweiliger Unterbrechung der Zuführung von einzuhüllenden Gegenständen zu vermeiden.The invention has for its object to avoid malfunctions in the functional sequence by coordinated interruption of the supply of blanks to the folding turret or the like in the event of a temporary interruption in the supply of objects to be wrapped.

Zur Lösung dieser Aufgabe ist das erfindungsgemäße Verfahren dadurch gekennzeichnet, daß beide Messer durch umlaufende Messerwalzen drehend bewegt werden, daß bei Unterbrechung der Zufuhr von zu verpackenden Gegenständen zum Faltaggregat der Antrieb für die fortlaufende Drehbewegung beider Messerwalzen aufrechterhalten wird und daß die Messerwalzen und/oder deren Messer in eine unwirksame Stellung bewegt werden.To achieve this object, the method according to the invention is characterized in that both knives are rotated by rotating knife rollers, that when the supply of objects to be packed to the folding unit is interrupted, the drive for the continuous rotational movement of both knife rollers is maintained and that the knife rollers and / or their Knives can be moved to an ineffective position.

Zur Lösung dieser Aufgabe ist weiterhin die erfindungsgemäße Vorrichtung durch die Merkmale des Anspruchs 6 gekennzeichnet.To achieve this object, the device according to the invention is further characterized by the features of claim 6.

Die Zuförderung von einzuhüllenden Gegenständen zum Faltrevolver wird bei der Erfindung überwacht, z. B. durch eine opto-elektrische Überwachungseinrichtung. Bei Unterbrechung der Förderung wird ein entsprechendes Signal an Aggregate für die Förderung der Materialbahn, für die Abtrennung und den Transport der Zuschnitte weitergeleitet, so daß diese keine weiteren Zuschnitte abtrennen bzw. dem Faltrevolver zufördern.The supply of objects to be wrapped to the folding turret is monitored in the invention, for. B. by an opto-electrical monitoring device. If the conveyance is interrupted, a corresponding signal is forwarded to units for conveying the material web, for separating and transporting the blanks, so that they do not separate any further blanks or convey them to the folding turret.

Erfindungsgemäß wird dabei die Materialbahn zur Herstellung der Zuschnitte in einem Bereich angehalten, der in Transportrichtung vor den Messerwalzen liegt, wobei weitere Zuschnitte nicht mehr abgetrennt werden. Dabei besteht eine Besonderheit darin, daß die Materialbahn um einen Nachlaufabschnitt über die Wirkungsebene der Messer (Trennmesser und Gegenmesser) hinaus gefördert und sodann angehalten wird. Der über die Trennebene hinausgehende Nachlaufabschnitt der Materialbahn ist kürzer als die Länge eines Zuschnitts und auf die Bewegung der einzuhüllenden Gegenstände, auf die Förderorgane für die Materialbahn und die Zuschnitte, einschließlich der Messerwalzen, so abgestimmt, daß bei Wiederbeginn des Transports der Gegenstände und damit der Materialbahn ein Zuschnitt in einem auf die Bewegung der Gegenstände und des Faltrevolvers abgestimmten Moment abgetrennt wird. Der Synchronlauf zwischen Zuschnitt und einzuhüllendem Gegenstand wird dadurch unverzüglich und ohne Verlust eines Zuschnitts bzw. ohne fehlende Umhüllung wieder hergestellt.According to the invention, the material web for producing the blanks is stopped in an area which lies in front of the knife rollers in the direction of transport, with further blanks no longer being cut off. A special feature is that the material web is conveyed by a trailing section beyond the action level of the knives (separating knife and counter knife) and then stopped. The trailing section of the material web beyond the parting plane is shorter than the length of a blank and on the movement of the objects to be wrapped, on the conveying elements for the material web and the blanks, including the knife rollers, adjusted so that when the transport of the objects and thus the material web starts again, a blank is cut off at a moment which is coordinated with the movement of the objects and the folding turret. The synchronous operation between the blank and the object to be wrapped is thereby immediately restored without loss of a blank or without a missing wrapping.

Die Messer der Messerwalzen sind während des zeitweiligen Förderstillstands für die Materialbahn in eine unwirksame Stellung gebracht, so daß trotz Drehung der Messerwalzen ein Trennschnitt nicht ausgeführt wird.The knives of the knife rollers are brought into an ineffective position during the temporary stoppage of conveyance for the material web, so that a separation cut is not carried out despite the rotation of the knife rollers.

Die erfindungsgemäße Vorrichtung für die Abtrennung von Zuschnitten von einer Materialbahn und Zuführung derselben zur Umfangsfläche eines Faltrevolvers umfaßt umlaufende Förderorgane mit Einschluß von umlaufenden Messerwalzen, denen ein Paar Zugwalzen für den Transport der Materialbahn vorgeordnet ist, die gesteuert bei fehlender Zuführung von Gegenständen abschaltbar sind, wobei beide Messer kontinuierlich umlaufenden Messerwalzen zugeordnet sind und die Messerwalzen bzw. deren Messer durch ortsfeste, bewegbare Steuerorgane in eine für den Schneideingriff unwirksame Stellung bewegbar sind.The device according to the invention for separating blanks from a web of material and feeding them to the circumferential surface of a folding turret comprises revolving conveying elements with the inclusion of revolving knife rollers, which are preceded by a pair of pulling rollers for the transport of the web of material, which can be switched off in a controlled manner if objects are not supplied, whereby Both knives are continuously assigned to rotating knife rollers and the knife rollers or their knives can be moved into a position which is ineffective for the cutting intervention by means of stationary, movable control members.

Die mit einer Schneidkante über eine Umfangsfläche der Messerwalzen hinwegragenden Trennmesser sind durch ortsfeste, bewegbare Steuerorgane außer Schneidstellung bewegbar, insbesondere gegen Federbelastung schwenkbar.The separating knives, which protrude over a circumferential surface of the knife rollers with a cutting edge, can be moved out of the cutting position by stationary, movable control members, in particular pivotable against spring loading.

Weitere Merkmale der Erfindung beziehen sich auf die Förderung der Materialbahn und der Zuschnitte sowie auf die Ausgestaltung der Messerwalzen und Messer.Further features of the invention relate to the conveyance of the material web and the blanks and to the design of the knife rollers and knives.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand der Zeichnungen näher erläutert. Es zeigt:

Fig. 1
einen Teilbereich eines Faltrevolvers mit Aggregaten für die Zuführung von einzuhüllenden Gegenständen, für die Förderung einer Materialbahn und die Herstellung und Förderung von Zuschnitten in schematischer Seitenansicht,
Fig. 2
Einzelheiten im Bereich des Transports der Materialbahn und der Zuschnitte in vergrößertem Maßstab, ebenfalls in Seitenansicht,
Fig. 3
Messerwalzen in nochmals vergrößertem Maßstab, ebenfalls in Seitenansicht.
An embodiment of the invention is explained below with reference to the drawings. It shows:
Fig. 1
a partial area of a folding turret with units for feeding objects to be wrapped, for conveying a material web and producing and conveying blanks in a schematic side view,
Fig. 2
Details in the area of the transport of the material web and the blanks on an enlarged scale, also in a side view,
Fig. 3
Knife rollers on a further enlarged scale, also in side view.

Das in den Zeichnungen dargestellte Ausführungsbeispiel befaßt sich mit der Verpackung von Stapeln 10 gefalteter Papiertaschentücher in einen Zuschnitt 11 aus Folienmaterial, z.B. PE-Folie. Die einzuhüllenden Gegenstände, also Stapel 10, werden durch einen horizontalen Zuförderer 12 einem Faltrevolver 13 als Faltaggregat zugeführt. Der Zuförderer 12 besteht aus einer feststehenden Lagerplatte 14 zur Auflage der Stapel 10 und winkelförmigen Mitnehmern 15, die durch Kettentriebe 16 über die Lagerplatte 14 hinweg bewegt werden.The embodiment shown in the drawings deals with the packaging of stacks 10 of folded paper handkerchiefs in a blank 11 made of film material, for example PE film. The objects to be wrapped, that is to say stacks 10, are conveyed by a horizontal feed conveyor 12 fed to a folding turret 13 as a folding unit. The feed conveyor 12 consists of a fixed bearing plate 14 for supporting the stack 10 and angular drivers 15, which are moved by chain drives 16 over the bearing plate 14.

Der Faltrevolver 13 ist mit einer Mehrzahl von an der radialen Außenseite offenen Taschen 17 versehen, in die jeweils ein - auf die Abmessung der Tasche 17 zusammengedrückter - Stapel 10 in Radialrichtung eingeschoben wird, und zwar unter Mitnahme eines Zuschnitts 11, der sich bei der Einschubbewegung U-förmig um den Stapel 10 herumlegt. Der Zuförderer 12 befindet sich annähernd in der horizontalen Mittelebene des aufrecht angeordneten Faltrevolvers. Der Einschub der Stapel 10 in die Taschen 17 erfolgt durch einen hin- und herbewegbaren Einschieber 18. Zuförderer 12, Faltrevolver 13 und weitere Organe sind zweckmäßigerweise so ausgebildet, wie in der DE-Patentanmeldung DE-A-37 01 273.8 (veröffentlicht am 28.7.1988) dargestellt und beschrieben.The folding turret 13 is provided with a plurality of pockets 17 which are open on the radial outside, into each of which a stack 10, which is compressed to the dimensions of the pocket 17, is inserted in the radial direction, with the aid of a blank 11 which moves during the insertion movement U-shaped around the stack 10. The feed conveyor 12 is located approximately in the horizontal center plane of the upright folding turret. The stack 10 is inserted into the pockets 17 by means of a slide 18 that can be moved back and forth. Feeder 12, folding turret 13 and other organs are expediently designed as described in DE patent application DE-A-37 01 273.8 (published on July 28. 1988) shown and described.

Die Zuschnitte 11 werden in einer der voranstehend beschriebenen Einschubstation in Drehrichtung des Faltrevolvers 13 vorgeordneten Zuschnittstation hergestellt und im Bereich einer Tasche 17 an die äußere Umfangsfläche 19 des Faltrevolvers 13 angelegt. Die Positionierung der Zuschnitte 11 an der Umfangsfläche 19 ist derart, daß jeweils eine Tasche 17 überdeckt wird. Beim Einschub eines Stapels 10 in diese wird so der Zuschnitt mitgenommen und umhüllt teilweise den Stapel 10. Im Bereich der Umfangsfläche 19 münden Saugbohrungen 20 zur Fixierung des Zuschnitts 11.The blanks 11 are produced in a blanking station arranged upstream of the insertion station described above in the direction of rotation of the folding turret 13 and are applied in the region of a pocket 17 to the outer peripheral surface 19 of the folding turret 13. The positioning of the blanks 11 on the peripheral surface 19 is such that a pocket 17 is covered in each case. When a stack 10 is inserted into it, the blank is taken along and partially envelops the stack 10. In the area of the peripheral surface 19, suction bores 20 open to fix the blank 11.

Die Zuschnitte 11 werden von einer Materialbahn 21 abgetrennt. Diese wird von einer (nicht dargestellten) Bobine abgezogen und über Umlenkwalzen 22, 23 mit Doppelschwinge 24 einem Trennaggregat zum Herstellen der Zuschnitte 11 zugeführt. Die bewegbare Doppelschwinge 24 dient zum Ausgleich von Schwankungen der Zuförderung der Materialbahn 21, so daß diese im Bereich der Abtrennung der Zuschnitte stets eine gleichbleibende Fördergeschwindigkeit aufweist. Im Bereich der Umlenkwalze 22 ist ein Fotoauge 25 angebracht zur Überwachung des exakten Laufs der Materialbahn 21.The blanks 11 are separated from a material web 21. This is drawn off from a bobbin (not shown) and fed to a separating unit for producing the blanks 11 via deflecting rollers 22, 23 with a double rocker 24. The movable double rocker 24 serves to compensate of fluctuations in the feed of the material web 21, so that it always has a constant conveying speed in the area of the cutting of the blanks. A photo eye 25 is attached in the area of the deflecting roller 22 for monitoring the exact running of the material web 21.

Zum Abtrennen der Zuschnitte 11 läuft die Materialbahn über eine (erste) Messerwalze 26 mit zwei Messern, nämlich Gegenmessern 27. Diese sind in üblicher Weise angeordnet und ausgebildet, derart, daß eine Schneidkante 28 geringfügig über die Umfangsfläche der Messerwalze 26 hinwegragt.To cut the blanks 11, the material web runs over a (first) knife roller 26 with two knives, namely counter knives 27. These are arranged and designed in a conventional manner such that a cutting edge 28 projects slightly beyond the circumferential surface of the knife roller 26.

Der Messerwalze 26 unmittelbar gegenüber ist achsparallel eine zweite Messerwalze 29 angeordnet, die ebenfalls zwei diametral einander gegenüberliegende Messer aufweist, nämlich Trennmesser 30. Der Abstand der Messerwalzen 26 und 29 voneinander ist so gewählt, daß eine ebenfalls über den Umfang der Messerwalze 29 hinwegragende Schneidkante 31 der Trennmesser 30 im Bereich des geringsten Abstands mit einem Gegenmesser 27 derart zusammenwirkt, daß die Materialbahn 21 unter Bildung eines Zuschnitts 11 durchtrennt wird. Die erste Messerwalze 26 läuft dabei im Uhrzeigersinn und die zweite Messerwalze 29 im Gegenuhrzeigersinn. Im Bereich einer Trennebene bzw. Trennstelle für die Materialbahn 21 laufen demnach Trennmesser 30 und Gegenmesser 27 in gleicher Richtung.Directly opposite the knife roller 26 is a second knife roller 29, which also has two diametrically opposed knives, namely separating knives 30. The distance between the knife rollers 26 and 29 is selected such that a cutting edge 31 also protrudes beyond the circumference of the knife roller 29 the cutting knife 30 cooperates in the area of the smallest distance with a counter knife 27 in such a way that the material web 21 is cut through to form a blank 11. The first knife roller 26 runs clockwise and the second knife roller 29 runs counterclockwise. In the area of a parting plane or parting point for the material web 21, parting knife 30 and counter knife 27 accordingly run in the same direction.

Die Materialbahn 21 wird an die Umfangs- bzw. Mantelfläche der ersten Messerwalze 26 herangeführt. Diese ist mit an der Umfangsfläche mündenden Saugbohrungen 32 versehen, die bei der Drehung der Messerwalze 26 zeitweilig an ein Saugsegment 33 einer feststehenden Saugscheibe bekannter Ausführung angeschlossen sind. Das Saugsegment 33 ist so angeordnet bzw. bemessen, daß die Materialbahn 21 im Bereich des Trennschnitts ausreichend für den Weitertransport durch die Messerwalze 26 an deren Umfang fixiert ist. Das Saugsegment 33 erstreckt sich demnach zu beiden Seiten der Trennebene und sodann in Förderrichtung der Messerwalze bis zu einem Bereich, in dem der Zuschnitt 11 an einen nachfolgenden Förderer übergeben wird, im vorliegenden Falle bis in den Bereich eines Übergabeförderers 34. Der vordere Bereich der Materialbahn 21 und - nach dem Trennschnitt - der Zuschnitt 11 werden demnach durch Saugluft auf dem Umfang der Messerwalze 26 gehalten.The material web 21 is brought up to the circumferential or lateral surface of the first knife roller 26. This is provided with suction bores 32 opening on the circumferential surface, which are temporarily connected to a suction segment 33 of a fixed suction disk of known design when the knife roller 26 rotates. The suction segment 33 is arranged or dimensioned such that the material web 21 in the area of the separating cut is sufficient for further transport is fixed to the circumference by the knife roller 26. The suction segment 33 accordingly extends on both sides of the parting plane and then in the conveying direction of the knife roller up to an area in which the blank 11 is transferred to a subsequent conveyor, in the present case up to the area of a transfer conveyor 34. The front area of the material web 21 and - after the separating cut - the blank 11 are accordingly held on the circumference of the knife roller 26 by suction air.

Der Übergabeförderer 34 ist bei dem vorliegenden Ausführungsbeispiel als Gurtförderer ausgebildet. Eine größere Förderwalze 35 nimmt die Zuschnitte 11 nacheinander auf. Eine im Abstand hiervon angeordnete kleinere Umlenkwalze 36 wird zusammen mit der Förderwalze 35 von Gurten 37 umschlungen. Die Gurte 37 bestehen aus mehreren nebeneinanderliegenden elastischen Bändern, insbesondere O-Ringen. Diese laufen in Umfangsnuten 38 der Förderwalze 35 und der Umlenkwalze 36. Die mit axialen Abständen voneinander angeordneten Gurte 37 sind dadurch im wesentlichen bündig mit der Mantelfläche der Förderwalze 35 und der Umlenkwalze 36. Die Zuschnitte 11 können dadurch an der Mantelfläche der Förderwalze 35 anliegen. Diese ist im Bereich zwischen den Gurten 37 mit Saugbohrungen 39 versehen, die wiederum während eines Teilbereichs der Umdrehung mit einem ortsfesten Saugsegment 40 in Verbindung kommen und dadurch mit Saugluft beaufschlagt sind.The transfer conveyor 34 is designed in the present embodiment as a belt conveyor. A larger conveyor roller 35 receives the blanks 11 one after the other. A smaller deflection roller 36 arranged at a distance therefrom is looped together with belts 37 together with the conveyor roller 35. The straps 37 consist of several elastic bands lying next to one another, in particular O-rings. These run in circumferential grooves 38 of the conveying roller 35 and the deflecting roller 36. The belts 37, which are arranged at axial distances from one another, are thereby essentially flush with the outer surface of the conveying roller 35 and the deflecting roller 36. The blanks 11 can thereby bear against the outer surface of the conveying roller 35. This is provided in the area between the belts 37 with suction bores 39, which in turn come into contact with a stationary suction segment 40 during a partial area of the rotation and are thus acted upon by suction air.

Die Zuschnitte 11 werden längs eines Abschnitts, der etwas kleiner ist als der halbe Umfang der Messerwalze 26, durch diese gefördert und sodann an die unmittelbar benachbart liegende Förderwalze 35 übergeben. In diesem Bereich ist die jeweils den Zuschnitt 11 bzw. die Materialbahn 21 auf der Mantelfläche der Messerwalze 26 haltende Saugbohrung an eine ortsfeste Entlüftungsbohrung 41 angeschlossen, so daß der Zuschnitt 11 bzw. die Materialbahn 21 in diesem Bereich nicht mehr gehalten, sondern von der Mantelfläche der Förderwalze 35 infolge der in diesem Bereich wirksamen, mit Saugluft beaufschlagten Saugbohrung 39 auf den Umfang der Förderwalze 35 überwechselt. Die Abmessungen sind im vorliegenden Falle so getroffen, daß die Länge eines Zuschnitts 11 in Transportrichtung größer ist als der Anlagebereich an der Messerwalze 26, so daß die Materialbahn 21 vor dem Trennschnitt bereits an der Förderwalze 35 anliegt.The blanks 11 are conveyed through this along a section which is somewhat smaller than half the circumference of the knife roller 26 and then transferred to the immediately adjacent conveyor roller 35. In this area, the suction hole holding the blank 11 or the material web 21 on the lateral surface of the knife roller 26 is connected to a fixed ventilation hole 41, so that the blank 11 or the material web 21 is no longer held in this area, but by the outer surface the conveying roller 35 is changed to the circumference of the conveying roller 35 as a result of the suction bore 39 which is effective in this area and is supplied with suction air. The dimensions in the present case are such that the length of a blank 11 in the transport direction is greater than the contact area on the knife roller 26, so that the material web 21 already bears against the conveyor roller 35 before the separating cut.

Nach dem Trennschnitt wird der Zuschnitt 11 durch die Förderwalze 35 an die Umfangsfläche 19 des Faltrevolvers 13 angelegt und längs einer gewissen Förderstrecke durch die sich ebenfalls an diese Umfangsfläche 19 anschmiegenden Gurte 37 gehalten.After the separating cut, the blank 11 is placed on the peripheral surface 19 of the folding turret 13 by the conveyor roller 35 and is held along a certain conveying path by the belts 37 which also cling to this peripheral surface 19.

Die Abtrennung der Zuschnitte 11 und Förderung zum Faltrevolver 13 ist von der Anlieferung von Gegenständen, näm lich Stapeln 10, abhängig, derart, daß bei fehlenden Stapeln 10 im Bereich des Zuförderers 12 keine Zuschnitte 11 an den Faltrevolver 13 angelegt werden.The separation of the blanks 11 and conveyance to the folding turret 13 is dependent on the delivery of objects, namely stacks 10, such that, in the absence of stacks 10 in the area of the feeder 12, no blanks 11 are applied to the folding turret 13.

Zu diesem Zweck wird die Zuführung der Stapel 10 im Bereich des Zuförderers 12 überwacht, z.B. durch optische Sensoren. Tritt eine Lücke in der Zuführung der Stapel 10 auf, wird der Antrieb der Materialbahn 21 in gesteuerter Weise unterbrochen.For this purpose the feed of the stacks 10 in the area of the feed conveyor 12 is monitored, e.g. through optical sensors. If there is a gap in the feed of the stacks 10, the drive of the material web 21 is interrupted in a controlled manner.

Der Antrieb der Materialbahn 21 erfolgt durch ein Paar von Zugwalzen 42, 43, die den Messerwalzen 26, 29 in Förderrichtung vorgeordnet sind. Diese werden bei fehlender Zufuhr von Stapeln 10 angehalten, jedoch derart, daß die Materialbahn noch einen Abschnitt der Materialbahn weiterfördert, und zwar über die Trennstelle im Bereich der Messerwalzen 26, 29 hinweg. Dieser Nachlaufabschnitt 44 beträgt etwa ein Viertel des Umfangs der Messerwalze 26 (Fig. 3). In dieser dort gezeigten Stellung kommt die Materialbahn 21 zum Stillstand. Diese exakte Stillstandsposition wird dadurch erreicht, daß die Zugwalzen 42, 43 durch einen Stellmotor 45 (Schrittmotor) angetrieben werden, der einen Stopp-Impuls vom Zuförderer erhält und dann die Materialbahn 21 noch um den beschriebenen Nachlaufabschnitt 44 weiterfördert. Die Übertragung des Stopp-Signals an den Stellmotor 45 ist dabei so gesteuert, daß die Förderung des Nachlaufabschnitts 44 stets nach einem Trennschnitt erfolgt.The material web 21 is driven by a pair of pull rollers 42, 43 which are arranged upstream of the knife rollers 26, 29 in the conveying direction. These are stopped when stacks 10 are not supplied, but in such a way that the material web continues to convey a section of the material web, specifically over the separation point in the area of the knife rollers 26, 29. This trailing section 44 is approximately a quarter of the circumference of the knife roller 26 (FIG. 3). In this position shown there, the material web 21 comes to a standstill. This exact standstill position is achieved in that the pull rollers 42, 43 are driven by a servomotor 45 (stepper motor) which receives a stop impulse from the feed conveyor and then conveys the material web 21 further by the trailing section 44 described. The transmission of the stop signal to the servomotor 45 is controlled in such a way that the promotion of the trailing section 44 always takes place after a separating cut.

Die Messerwalzen 26, 29 und der Übergabeförderer 34 werden - ebenso wie der Faltrevolver 13 - nach dem Anhalten der Materialbahn 21 unverändert, nämlich kontinuierlich, weiterbewegt. Damit es nicht zur Abtrennung von Zuschnitten kommt, werden die Messer außer Schneideingriff miteinander bewegt. Bei dem vorliegenden Ausführungsbeispiel werden zu diesem Zweck die Trennmesser 30 auf der Messerwalze 29 (zeitweilig) verstellt. Die Materialbahn 21, nämlich deren Nachlaufabschnitt 44, liegt dabei schlupfend an der Mantelfläche der Messerwalze 26 an.The knife rollers 26, 29 and the transfer conveyor 34 - like the folding turret 13 - continue to move unchanged, namely continuously, after the material web 21 has stopped. In order to prevent cuts from being cut, the knives are moved with each other apart from cutting engagement. In the present exemplary embodiment, the separating knives 30 on the knife roller 29 are (temporarily) adjusted for this purpose. The material web 21, namely its trailing section 44, slips against the outer surface of the knife roller 26.

Zur Verstellung der Trennmesser 30 sind diese bewegbar an der Messerwalze 29 angebracht. Bei dem gezeigten Ausführungsbeispiel ist die Messerwalze 29 an diagonal gegenüberliegenden Seiten mit im Querschnitt etwa dreieckförmigen Ausnehmungen 46 versehen. In diesen sind die Trennmesser 30 bewegbar, nämlich schwenkbar gelagert.To adjust the separating knives 30, they are movably attached to the knife roller 29. In the exemplary embodiment shown, the knife roller 29 is provided on diagonally opposite sides with recesses 46 which are approximately triangular in cross section. The separating knives 30 can be moved, namely pivoted, in these.

Ein radial innenliegender End- bzw. Randbereich der Trennmesser 30 ist mit einer runden, nämlich im Lagerbereich zylindrischen Lagerverdickung 47 versehen. Diese liegt drehbar (gleitend) in einer passenden, muldenförmigen Vertiefung 48 einer Seitenfläche 49 der Ausnehmung 46. Die annähernd radial bzw. parallel zu einer (gedachten) Radialfläche gerichtete Seitenfläche 49 dient zugleich als Anlagefläche für das Trennmesser 30 in der Normal- bzw. Schneidstellung.A radially inner end or edge region of the separating knife 30 is provided with a round thickening 47, namely cylindrical in the bearing region. This lies rotatably (slidingly) in a suitable, trough-shaped depression 48 of a side surface 49 of the recess 46. The side surface 49, which is oriented approximately radially or parallel to an (imaginary) radial surface, also serves as a contact surface for the cutting knife 30 in the normal or cutting position .

Das Trennmesser 30 wird durch eine geringe Schwenkbewegung um die Achse der Lagerverdickung 47, nämlich durch Drehung derselben in der Vertiefung 48, aus der Schneidstellung heraus bewegt (Fig. 3, oberes Trennmesser 39). Diese Schwenkbewegung des Trennmessers 30 erfolgt gegen die Belastung einer Feder 50. Diese sitzt auf einem quer zum Trennmesser 30 gerichteten Bolzen 51, der durch eine Bohrung 52 in dem Trennmesser 30 hindurchtritt und an der Seitenfläche 49 befestigt ist.The separating knife 30 is moved out of the cutting position by a slight pivoting movement about the axis of the bearing thickening 47, namely by rotating the same in the recess 48 (FIG. 3, upper separating knife 39). This pivoting movement of the cutting knife 30 takes place against the load of a spring 50. The spring sits on a bolt 51 directed transversely to the cutting knife 30, which passes through a bore 52 in the cutting knife 30 and is fastened to the side surface 49.

Zur Betätigung des Trennmesssers 30 im vorstehenden Sinne ist in der Messerwalze 29 benachbart zur Seitenfläche 49 ein Stellorgan gelagert, nämlich ein drehbares Exzenterstück 53. Dieses ist hier als einseitig abgeplatteter Drehbolzen ausgebildet, der um eine Achse parallel zur Drehachse der Messerwalze 29 drehbar ist. Bei einer Drehung tritt eine Kante aus der Ebene der Seitenfläche 49 heraus und verschwenkt das Trennmesser 30. In der Schneidstellung liegt das Trennmesser im Bereich der Abplattung an dem Exzenterstück 53 an.To actuate the separating knife 30 in the above sense, an actuator is mounted in the knife roller 29 adjacent to the side surface 49, namely a rotatable eccentric piece 53. This is designed as a pivot pin flattened on one side, which can be rotated about an axis parallel to the axis of rotation of the knife roller 29. During a rotation, an edge emerges from the plane of the side surface 49 and pivots the separating knife 30. In the cutting position, the separating knife lies against the eccentric piece 53 in the area of the flattening.

Zur Durchführung der Drehbewegungen des Exzenterstücks 53 ist an diesem, nämlich an einem freien, seitlich aus der Messerwalze 29 herausragenden Ende, ein Betätigungsarm 54 angebracht. Dieser ist an seinem freien Ende mit einer Tastrolle 55 versehen, die zur Betätigung des Exzenterstücks 53 und damit zur Verschwenkung des Trennmessers 30 an einem ortsfesten, beweglichen Betätigungsorgan 54 Anlage erhält. Dieses besteht im vorliegenden Falle aus einem Kurvensegment 56, welches durch einen Druckmittelzylinder 57 in die Arbeitsstellung (Fig. 3) bzw. aus dieser heraus bewegt werden kann (Fig. 2). Das Kurvensegment 56 ist so ausgebildet, daß die Tastrolle 55 bei der Drehbewegung der Messerwalze 29 frei gegen eine Stützfläche 58 des Kurvensegments 56 läuft. Bei Weiterbewegung wird der Betätigungsarm 54 zunehmend verschwenkt, bis im Bereich der Trennstelle für die Materialbahn 21 das betreffende Trennmesser 30 ausreichend weit zurückgeschwenkt ist. Es finden demnach lediglich sehr knappe, geringe Bewegungen der Trennmesser ausschließlich im Bereich der Trennstelle statt. Danach, wenn nämlich die Tastrolle 55 den Bereich des Kurvensegments 56 verlassen hat, kehrt das Trennmesser 30 in die Normalstellung zurück.In order to carry out the rotary movements of the eccentric piece 53, an actuating arm 54 is attached to the latter, namely at a free end projecting laterally from the knife roller 29. This is provided at its free end with a feeler roller 55, which receives 54 for actuating the eccentric piece 53 and thus for pivoting the cutting knife 30 on a stationary, movable actuating member. In the present case, this consists of a curve segment 56 which can be moved into the working position (FIG. 3) or out of it by a pressure medium cylinder 57 (FIG. 2). The cam segment 56 is designed such that the feeler roller 55 runs freely against a support surface 58 of the cam segment 56 when the knife roller 29 rotates. When moving further, the actuating arm 54 is increasingly pivoted until the cutting knife in question in the region of the separation point for the material web 21 30 is pivoted back sufficiently far. Accordingly, only very short, slight movements of the cutting knife take place exclusively in the area of the cutting point. After that, when the sensing roller 55 has left the area of the cam segment 56, the cutting knife 30 returns to the normal position.

Im Bereich der Trennstelle ist die Messerwalze 26 benachbart zum Gegenmesser 27 mit einer Vertiefung 59 versehen, in die das außer Eingriff gebrachte Trennmesser 30 kurzzeitig unter Mitnahme der Materialbahn 21 eintritt, ohne jedoch diese zu durchtrennen.In the region of the separation point, the knife roller 26 is provided with a recess 59 adjacent to the counter knife 27, into which the disengaged separation knife 30 briefly enters, taking the material web 21 with it, but without cutting through it.

Nach Beendigung einer Phase der unterbrochenen Zuführung von Stapeln 10 wird durch ein entsprechendes Steuersignal das Kurvensegment 56 in die Ausgangsstellung zurückgezogen und der Antrieb für die Zugwalzen 42, 43 wieder in Gang gesetzt. Es werden nunmehr wieder Zuschnitte exakt in der erforderlichen Relativstellung hergestellt und zugeführt.After a phase of the interrupted supply of stacks 10 has ended, the curve segment 56 is pulled back into the starting position by a corresponding control signal and the drive for the pull rollers 42, 43 is started again. Blanks are now produced and fed exactly in the required relative position.

Der Übergabeförderer 34 läuft im vorliegenden Falle mit einer geringfügig größeren Geschwindigkeit als die Messerwalze 26. Dadurch werden geringe Lücken zwischen den aufeinande folgenden Zuschnitten 11 geschaffen.The transfer conveyor 34 runs in the present case at a slightly higher speed than the knife roller 26. This creates small gaps between the successive blanks 11.

Claims (15)

  1. Process for feeding blanks (11) of packaging material to a folding unit, especially to a folding turret (13), for the wrapping of articles or groups (10) of articles, the blanks (11) being severed from a continuous web of material (21) by cooperating knives (27, 30), at least one knife being moved in a rotating manner by a rotating knife roller, furthermore the feed of the blanks (11) to the folding unit being controlled as a function of the feed of articles to be packaged, in such a way that, when there is an interruption in the feed of articles, the transfer of blanks (11) to the folding unit is interrupted until articles to be packaged are fed to the folding unit once again, and furthermore, when the feed of articles to be packaged to the folding unit is interrupted, the drive being maintained for the continuous rotary movement of the knife roller and the web of material being stopped, characterized in that both knives (27, 30) are moved in a rotating manner by rotating knife rollers (26, 29), in that, when the feed of articles to be packaged to the folding unit is interrupted, the drive is maintained for the continuous rotary movement of both knife rollers (26, 29) and in that the knife rollers (26, 29) and/or their knives (27, 30) are moved into an ineffective position.
  2. Process according to Claim 1, characterized in that the knives (30) of the first knife roller (29) are adjusted, in particular pivoted, out of cutting engagement periodically, namely for the moment at which they are positioned opposite the knife (27) of the second knife roller (26).
  3. Process according to Claim 1 or 2, characterized in that the web of material (21) is stopped in such a way that a portion (44) of the web of material (21) located at the front in the direction of transport is conveyed beyond a severing plane formed by the severing knives (27, 30) of the knife rollers (26, 29).
  4. Process according to Claim 1 and one or more of the further claims, characterized in that the web of material (21) is driven by drawing rollers (42, 43) which precede the knife rollers (26, 29) and which can be controlled as a function of the feed of articles (10) to be packaged to the folding turret (13), upon disconnection a drive of the drawing rollers (42, 43), especially a servo-motor (45), conveying a follow-up portion (44) of the web of material (21) until the latter stops.
  5. Process according to Claim 1 and one or more of the further claims, characterized in that, when there is an interruption in the feed of articles (10) to be packaged to the folding turret (13), the drive of the drawing rollers (42, 43) for the web of material (21) is disconnected at the moment when a severing cut is made.
  6. Apparatus for feeding blanks (11) of packaging material to a folding unit, in particular a folding turret (13) for the packaging of articles or groups (10) of articles, the blanks (11) being severable from a continuous web of material (21) by radially directed knives (27, 30) and capable of being fed to the folding unit, at least one knife being assigned to a continuously rotating knife roller, with a drive for the web of material, which drive can be stopped when there is no feed of articles to be packaged by bringing drawing rollers (42, 43) to a standstill, and with a monitoring member for monitoring the feed of articles (10) to be packaged to the folding unit, characterized in that both knives (27, 30) are assigned to continuously rotating knife rollers (26, 29), and in that the knife rollers (26, 29) and/or their knives (27, 30) can be moved into a position ineffective for the cutting engagement by fixed-in-place; movable control members.
  7. Apparatus according to Claim 6, characterized in that the knives (30) of the first knife roller (29) can be adjusted, in particular pivoted, by actuating members interacting with the control members, out of cutting engagement periodically, namely for the moment at which they are positioned opposite the knife (27) of the second knife roller (26).
  8. Apparatus according to Claim 7, characterized in that the severing knife or severing knives (30) of the knife roller (29) is or are adjustable in the peripheral direction counter to spring-loading during the rotary movement, in such a way that at least one cutting edge (31) of the severing knives (30) is located in the region of the severing plane of the web of material (21) at the distance from the cutting edge (28) of the counter knife (27).
  9. Apparatus according to Claim 7 or 8, characterized in that the severing knife or severing knives (30) is or are mounted pivotably about an axis of rotation (thickened bearing portion 47) distant from the cutting edge (31) in the direction of the axis of rotation of the knife roller (29) and is or are pivotable in a direction counter to the direction of rotation of the knife roller (29) for adjustment out of cutting engagement.
  10. Apparatus according to Claim 9, characterized in that each severing knife (30) rests against an approximately radially directed knife-supporting face (side face 49) in a recess (46) of the knife roller (29) and can be lifted off from this for movement into the position out of cutting engagement, preferably counter to the load of a spring (50) arranged on a fixed bolt (51).
  11. Apparatus according to Claim 9, characterized in that each severing knife (30) is mounted rotatably, by means of a radially inner cylindrical thickened bearing portion (47), in a correspondingly shaped depression (48) in the side face (49).
  12. Apparatus according to Claim 8 and one or more of the further claims, characterized in that each severing knife (30) is moveable, especially pivotable, by means of an actuating arm (54) which comes to rest by means of a tracer roller (55) against an adjustable control member fixed in place, especially against a curved segment (56).
  13. Apparatus according to Claim 6 and one or more of the further claims, characterized in that a transfer conveyor (34) for transferring the blank (11) to a peripheral surface (19) of the folding turret (13) is located after the knife rollers (26, 29) in the conveying direction of the blank (11) or of the web of material (21), the transfer conveyor (34) preferably consisting of a conveyor roller (35) with suction bores (39) along the periphery.
  14. Apparatus according to Claim 13, characterized in that connected to the conveyor roller (35) of the transfer conveyor (34) is an endless conveyor resting snugly against the peripheral surface (19) of the folding turret (13) and consisting especially of belts (37) which are guided in peripheral grooves (38) and which run over a deflecting roller (36) located at a distance, in such a way that a conveying strand of the belts (37) rests against the peripheral surface (19).
  15. Apparatus according to Claim 6 and one or more of the further claims, characterized in that the drawing rollers (42, 43) for transporting the web of material (21) are driven by means of a servo-motor (45) which can be activated by a monitoring member assigned to a delivery conveyor (12) for the articles (stack 10) to be packaged.
EP88107919A 1987-06-30 1988-05-18 Method and device for feeding packaging blanks into a folding device Expired - Lifetime EP0297266B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873721459 DE3721459A1 (en) 1987-06-30 1987-06-30 METHOD AND DEVICE FOR FEEDING PACKAGING CUTTINGS TO A FOLDING UNIT
DE3721459 1987-06-30

Publications (3)

Publication Number Publication Date
EP0297266A2 EP0297266A2 (en) 1989-01-04
EP0297266A3 EP0297266A3 (en) 1990-03-07
EP0297266B1 true EP0297266B1 (en) 1994-09-28

Family

ID=6330525

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88107919A Expired - Lifetime EP0297266B1 (en) 1987-06-30 1988-05-18 Method and device for feeding packaging blanks into a folding device

Country Status (6)

Country Link
US (1) US4885895A (en)
EP (1) EP0297266B1 (en)
JP (1) JPH0764337B2 (en)
BR (1) BR8803223A (en)
CA (1) CA1308130C (en)
DE (2) DE3721459A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012101493A1 (en) 2011-01-26 2012-08-02 Gima S.P.A. Command and control apparatus to control and command operating units of a packing machine and corresponding method

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3832533A1 (en) * 1988-09-24 1990-03-29 Focke & Co DEVICE FOR FEEDING PACKAGING CUTTINGS TO A FOLDING UNIT
IT1238296B (en) * 1990-04-02 1993-07-12 Gd Spa METHOD AND PLANT FOR THE OVERWRAPPING OF PACKAGES.
US5216867A (en) * 1991-11-04 1993-06-08 Sundowner Offshore Services, Inc. Well mast structure
JPH0562034U (en) * 1992-01-28 1993-08-13 株式会社小坂研究所 Chip ejector
IT1261903B (en) * 1993-03-10 1996-06-03 Sasib Spa FEEDER FOR PACKAGING SHEETS, IN PARTICULAR IN CIGARETTE PACKING MACHINES.
GB9401441D0 (en) * 1994-01-26 1994-03-23 Molins Plc Label-applying method and apparatus
JP3079504B2 (en) * 1995-10-23 2000-08-21 株式会社新川 Wafer die pickup method
DE10231867A1 (en) * 2002-07-12 2004-01-22 Basell Polyolefine Gmbh Plastic parison partitioning device for producing hollow plastic article, has two driven rolls arranged in vicinity of cutter placed on holder in extrusion direction
KR20090128510A (en) 2002-07-12 2009-12-15 바젤 폴리올레핀 게엠베하 Multistage process for producing hollow plastic articles from half shells
DE102013106166A1 (en) 2013-06-13 2014-12-31 Krones Aktiengesellschaft TRANSPORT FOR INTERCONNECTION
DE102013111477A1 (en) 2013-10-17 2015-04-23 Krones Aktiengesellschaft PACKAGING MACHINE AND METHOD FOR LOADING A PACKAGING MACHINE WITH CUTTING STACKS

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2953880A (en) * 1958-09-02 1960-09-27 Redington Co F B Wrapping machine
DE1169361B (en) * 1959-12-08 1964-04-30 Hauni Werke Koerber & Co Kg Method and device for feeding wrapping material to a packaging web
US3136104A (en) * 1961-08-21 1964-06-09 Kimberly Clark Co Apparatus for manufacture of cellulosic products
US3269085A (en) * 1963-09-23 1966-08-30 Package Machinery Co Wrapper feed mechanism
DE1586089A1 (en) * 1966-07-08 1970-04-16 Hauni Werke Koerber & Co Kg Method and packing machine for wrapping cigarette packs
CA973086A (en) * 1971-02-12 1975-08-19 Goffredo Gianese Apparatus for feeding and cutting web material
IT1060903B (en) * 1976-03-31 1982-09-30 Gd Spa REGISTRATION AND DISCHARGE DEVICE OF STICKS OF WRAPPING MATERIAL TIN PAPER IN CIGARETTE CONDITIONING MACHINES IN PACKAGES AT VERY HIGH PRODUCTION SPEED
DD127713A1 (en) * 1976-10-13 1977-10-12 Wolfgang Girndt DEVICE FOR INTERRUPTING THE PACKAGING SUPPLY
JPS5394699A (en) * 1977-01-28 1978-08-18 Shirakawa Shigiyou Kk Reinforcing treatment for knot strength of aromatic polyamide thread
DD138635A1 (en) * 1978-09-04 1979-11-14 Werner Kmoch DEVICE FOR TRYING THE PRESENCE OF A BONBON
DE2949252A1 (en) * 1979-12-07 1981-06-11 Focke & Co, 2810 Verden METHOD AND DEVICE FOR PACKING CIGARETTES OR THE LIKE
IT1136172B (en) * 1980-04-09 1986-08-27 Cir Spa Divisione Sasib ELECTRONIC ADJUSTMENT DEVICE FOR PROGRESSIVE CUTTING IN SHEETS OF A MATERILAE TAPE SPOOL IN SHEET EVEN PRINTED
DD158536A1 (en) * 1981-05-13 1983-01-19 Guenter Foerster DEVICE FOR INTERRUPTING THE DISCHARGE
DE3333053A1 (en) * 1983-09-14 1985-03-21 Focke & Co, 2810 Verden DEVICE FOR PRODUCING PACKS, IN PARTICULAR CIGARETTE RODS
JPS60169289U (en) * 1984-04-18 1985-11-09 横浜ゴム株式会社 Sports protection net
JPS63126952A (en) * 1986-11-13 1988-05-30 旭化成株式会社 Sheet like article for preventing cutting

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012101493A1 (en) 2011-01-26 2012-08-02 Gima S.P.A. Command and control apparatus to control and command operating units of a packing machine and corresponding method

Also Published As

Publication number Publication date
EP0297266A3 (en) 1990-03-07
BR8803223A (en) 1989-01-17
CA1308130C (en) 1992-09-29
JPH0764337B2 (en) 1995-07-12
US4885895A (en) 1989-12-12
DE3721459A1 (en) 1989-01-12
EP0297266A2 (en) 1989-01-04
JPS6445221A (en) 1989-02-17
DE3851660D1 (en) 1994-11-03

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