EP0528126B1 - Apparatus for collecting or stacking flat workpieces on a stacking table - Google Patents

Apparatus for collecting or stacking flat workpieces on a stacking table Download PDF

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Publication number
EP0528126B1
EP0528126B1 EP92109388A EP92109388A EP0528126B1 EP 0528126 B1 EP0528126 B1 EP 0528126B1 EP 92109388 A EP92109388 A EP 92109388A EP 92109388 A EP92109388 A EP 92109388A EP 0528126 B1 EP0528126 B1 EP 0528126B1
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EP
European Patent Office
Prior art keywords
suction
cylinder
folding
stacking
workpieces
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
Application number
EP92109388A
Other languages
German (de)
French (fr)
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EP0528126A1 (en
Inventor
Fritz Ing. Grad. Achelpohl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Windmoeller and Hoelscher KG
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Windmoeller and Hoelscher KG
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Publication of EP0528126A1 publication Critical patent/EP0528126A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H31/00—Pile receivers
    • B65H31/04—Pile receivers with movable end support arranged to recede as pile accumulates
    • B65H31/06—Pile receivers with movable end support arranged to recede as pile accumulates the articles being piled on edge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/68—Reducing the speed of articles as they advance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/92—Delivering
    • B31B70/98—Delivering in stacks or bundles
    • B31B70/986—Stacking bags by means of a rotary stacking drum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/42—Piling, depiling, handling piles
    • B65H2301/421—Forming a pile
    • B65H2301/4214—Forming a pile of articles on edge
    • B65H2301/42146—Forming a pile of articles on edge by introducing articles from above
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/19—Specific article or web
    • B65H2701/191—Bags, sachets and pouches or the like

Definitions

  • the invention relates to a device for collecting or stacking flat workpieces conveyed on a transport cylinder provided with holding tongs on a stacking table placed on the transport cylinder or on stacking arms placed on it, parallel to one another, preferably of bags or sacks provided on a folding plier cylinder and provided with glued bottoms , which is provided with a device that opens the holding or folding tongs before reaching the storage table and with a device that brakes the workpieces in such a way that the workpieces are placed on the stacking table at a lower speed than the peripheral speed of the transport or folding tong cylinder.
  • a plunger provided with elastic cushions and provided with elastic cushions are provided in a device of the type specified at the outset which is known from DE-B 10 54 818 in time with the placement of the workpieces on the circumference of the folding pliers cylinder be made in such a way that they exert a braking torque on the workpieces released by the folding pliers.
  • the braking force exerted by the tappets on the end region of the workpieces to be braked depends on the size of the pressure on the folding pincer cylinder, which runs frictionally under the braked workpiece, so that differently sized and opposite frictional forces act on the two sides of the workpiece Can distort workpiece, which is particularly disadvantageous if it is thin and / or double-walled, as is the case for example with bags or sacks.
  • a device which converts flat workpieces fed one after the other into a so-called scale formation on a further conveyor.
  • a transport wheel is provided which takes over the workpieces to be transferred and which is provided with a pair of fixed suction cups and a pair of movable suction cups.
  • the suction cups work together in such a way that the workpieces that are fed in and are to be transferred in scale form are first gripped by the fixed suction cups, which take them along with the peripheral speed of the transport wheel.
  • the fixed suction cups release the leading ends of the workpieces, which are then only held by the suction cups holding the trailing ends.
  • These suction cups carry out a controlled counter-rotating movement, which leads to a deceleration of the workpieces and has the purpose of decelerating the workpieces and placing them on the conveying scale belt at a predetermined distance.
  • the device according to the invention thus makes it possible to produce workpieces made of soft material or bags made of thin, lobed or wrinkled material with a high output, that is to say a high number of cycles, and to deposit them on the stacking pad almost without bumps.
  • control curve is expediently designed in such a way that it decelerates the suction cups towards zero or almost zero in the direction of the storage table.
  • the suction cups lift the workpiece from the transport cylinder so that they no longer follow the circular conveying path of the transport cylinder and can be placed on the stacking pad in the tangential direction to the transport cylinder. This lifting favors the setting down of the workpieces behind normal deflection fingers provided on the stacking pad, which are perpendicular to the stacking pad and engage in circumferential grooves of the transport cylinder.
  • the suction air supply to the suction devices is expediently controlled in such a way that it is interrupted when or shortly before the setting edges of the workpieces hit the stacking table.
  • the interruption expediently takes place at the point in time at which the suction devices have reached their lowest speed or even the speed zero relative to the stacking base.
  • these or with these or the suction shaft connected stop parts are provided, which rest under spring force on an abutment of the transport cylinder outside the effective range of the control curve.
  • the suction belt or belts partially engage in circumferential grooves of the transport cylinder, so that a trouble-free run-up of the leading edges of the workpieces released by the transport tongs onto the suction belt or belts is ensured.
  • the speed of the suction belts and the suction air supply to them can expediently be controlled.
  • the control system is such that the suction belt or belts, after sucking in the leading area of the workpieces, perform a movement which delays them, the suction air supply being interrupted at or shortly before the workpieces are placed on the stacking pad becomes.
  • a transport roller can be set on the transport cylinder, which feeds the workpiece after release by the holding tongs.
  • tubular web for example from a paper tubular web provided with a longitudinal adhesive seam
  • bags or sacks are produced, which are provided with folded and glued bottom folds.
  • the tubular web 1 can be provided with side gussets, the walls being provided with perforation lines offset from one another, so that after tearing off bag sections from the tubular web 1, sections result in which the open ends overlap one another.
  • the tubular web 1 is advanced by the pair of transport rollers 4 and promoted in the direction of arrow 2 on the table 3.
  • the two tear-off roller pairs 5, 6 then tear off sack or bag workpieces along the transverse perforation lines from the tubular web 1 when the cross perforation lines are between the roller pairs 5, 6.
  • the tube web is held by the pair of rollers 5, while the pair of rollers 6, in order to generate the tearing tension, rotates briefly at a higher speed.
  • the torn off sections are then provided on the folding pliers cylinder 30 with folded and glued bottoms and placed vertically on the stacking table 31 for their collection or stacking.
  • the folding pliers cylinder 30 is provided with three so-called folding beam abutments 12, 12 ', 12' 'which cooperate like pliers with the pivotable folding pliers jaws 13, 13', which can be pivoted about pivot axes 14 mounted on the folding pliers cylinder 30 and in the direction by springs, not shown are applied to their closed position.
  • actuating levers 15 which carry cam rollers 16 at the ends.
  • the cam rollers 16 run onto a control cam 17 which is fixed to the frame and which opens the folding tongs to release the folded bottoms before the bags or sacks are set down, as can be seen from the folding tongs 12 ', 13'.
  • a suction pipe 32 is pivotally mounted eccentrically to the axis of rotation 20 in the folding pinch cylinder 30, the pivot axis 19 of which extends parallel to the folding pin axis 20.
  • the suction pipe 22 is provided with an actuating lever 21 which carries a cam roller 22 at the end.
  • Suction pipes 18 are connected to the suction pipe 32 in a radial plane and carry suction nozzles 33 at the end.
  • the suction tubes 18 are connected to tension springs 25, the other ends of which are firmly connected to the folding pincer cylinder by means of pins 26 are. By means of the tension springs 25, the suction tubes 18 are held in abutment against folding jaw cylinders, fixed stops 24 or acted upon in the direction thereof.
  • the cam rollers 22 of the levers 21 actuating the suction cup run on control cams 23 over part of their rotation, the curve characteristic of the control curve 23 and the eccentricity of the axis 19 of the suction pipe 22 being selected such that the suction nozzles 33 emerge from the cylinder surface of the folding pliers cylinder 30 move out as soon as the suction nozzles 33 are located approximately vertically above the storage table 33, and then execute an approximately tangential movement which is perpendicular to the footprint of the storage table 31.
  • the storage table 31 is arranged on the folding pliers cylinder 30 below its horizontal diameter plane and has vertically projecting deflecting fingers 36 which engage in circumferential grooves of the folding pliers cylinder.
  • a folding knife cylinder 7 is provided on the folding pliers cylinder 30, which is provided with a folding knife 11 running along a surface line. Immediately behind the folding knife 11, the folding knife cylinder 7 is provided with a stamp 10, which removes a glue strip from a glue roller 8, which closes a glue box 9, and transfers it in format to the bag workpieces.
  • the bags provided and conveyed in this way on the folding pliers cylinder with folded and glued bottoms are then sucked in by the suction nozzles 33 when they continue to move when they emerge from the enveloping cylinder of the folding jaw cylinder due to the control of the suction tube 32 and the eccentricity of the axis of the suction tube 32.
  • the suction tubes 18 execute a movement which delays the sacks or bags being sucked in, so that they are deposited on the stacking table 31 at a speed which is delayed to zero or almost to zero.
  • the suction air supply to the suction cups 33 is controlled in such a way that they suck the bag workpieces approximately in an area in which the suction cups lie horizontally.
  • the folding tongs 12, 13 open so that the folded bottoms detach from the folding tongs cylinder and the suction cups take over the further delayed transport of the bags until they are placed on the tray table 31.
  • the approximately tangential, delayed conveyance of the sacks by the suction cups means that they are securely placed behind the deflecting fingers 36 on the support surface of the stacking table 31.
  • Suction cups are assigned to each of the three folding pliers, of which only one is shown in the drawing.
  • the vacuum acting on the suction tubes 18 is preferably activated shortly before the folding tongs open. The vacuum is then switched off again shortly before the bags are placed on the stacking table 31.
  • the folding pliers cylinder 30 is constructed in the same way as the folding pliers cylinder according to FIGS. 1 and 2 with regard to the folding pliers and their control.
  • the exemplary embodiment according to FIG. 3 differs from that according to FIGS. 1 and 2 in that, instead of the suction pipes pivotable about eccentric axes, a suction belt 40 is provided, the conveyor run 41 of which is via a suction box 42 is running.
  • a plurality of suction belts 40 are expediently provided, which, as can be seen from FIG. 3, engage in circumferential grooves of the folding pliers cylinder 30.
  • the ends provided with the folded bottoms run up after their release from the folding tongs onto the suction belt 40, whereby they are then sucked in by the conveying strands 41 as soon as they run over the suction boxes 42.
  • the suction belts 40 and the suction boxes 42 are controlled in such a way that the sucked-in bags are decelerated to zero or almost zero speed. Shortly before the bags are placed on the stacking table 31, the suction air supply to the suction boxes 12 is switched off.
  • the suction belt conveyors 40 are arranged stationary in the machine frame.
  • a spring-loaded transport roller 44 is set against the folding tongs cylinder 30.
  • the distance between the transport roller 44 and the upper deflection roller 45 of the suction belt conveyor 40 is greater than the length of a sack, so that proper conveyance is ensured until the leading ends of the sacks provided with the folded bottoms emerge on the suction belt conveyor 40.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Pile Receivers (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zum Sammeln oder Stapeln von auf einem mit Haltezangen versehenen Transportzylinder geförderten flachen Werkstücken auf einem an den Transportzylinder angestellten Stapeltisch oder auf an diesen angestellten, zueinander parallelen Stapelarmen, vorzugsweise von auf einem Falzzangenzylinder hergestellten, mit geklebten Böden versehenen Beuteln oder Säcken, die mit einer die Halte- oder Falzzangen vor Erreichen des Ablagetisches öffnenden Einrichtung und mit einer die Werkstücke abbremsenden Einrichtung in der Weise versehen ist, daß die Werkstücke mit einer geringeren Geschwindigkeit als der Umfangsgeschwindigkeit des Transport- oder Falzzangenzylinders auf den Stapeltisch abgesetzt werden.The invention relates to a device for collecting or stacking flat workpieces conveyed on a transport cylinder provided with holding tongs on a stacking table placed on the transport cylinder or on stacking arms placed on it, parallel to one another, preferably of bags or sacks provided on a folding plier cylinder and provided with glued bottoms , which is provided with a device that opens the holding or folding tongs before reaching the storage table and with a device that brakes the workpieces in such a way that the workpieces are placed on the stacking table at a lower speed than the peripheral speed of the transport or folding tong cylinder.

Eine Vorrichtung zum Sammeln von auf einem Falzzangenzylinder hergestellten, mit geklebten Böden versehenen Beuteln auf einem an den Falzzangenzylinder angestellten Stapeltisch ist beispielsweise aus der US-A 20 87 704 bekannt. Bei dieser bekannten Vorrichtung werden die Beutel von den Falzzangen kurz vor Erreichen des Stapeltisches freigegeben, so daß sie nahezu ungebremst etwa mit der Umfangsgeschwindigkeit des Falzzangenzylinders mit ihren vorauslaufenden Böden auf den Stapeltisch stoßen. Bestehen die Beutel aus weicherem Material, kann es daher zu einem Knittern oder Stauchen der auf den Stapeltisch aufstoßenden Kanten kommen.A device for collecting bags produced on a folding tong cylinder and provided with glued bottoms on a stacking table attached to the folding tong cylinder is known, for example, from US Pat. No. 2,087,704. In this known device, the bags are released from the folding tongs shortly before reaching the stacking table, so that they hit the stacking table with their leading bottoms almost unrestrained at the peripheral speed of the folding pincer cylinder. If the bags are made of softer material, the edges hitting the stacking table may wrinkle or compress.

Um ein Wellen, Knicken oder Falten der mit ihren vorauslaufenden Kanten auf den Stapeltisch abgesetzten Werkstücke zu vermeiden, sind bei einer aus der DE-B 10 54 818 bekannten Vorrichtung der eingangs angegebenen Art an einem schwenkbaren Rahmen angeordnete mit elastischen Polstern versehene Stößel vorgesehen, die im Takt des Absetzens der Werkstücke an den Umfang des Falzzangenzylinders in der Weise angestellt werden, daß sie ein Bremsmoment auf die von den Falzzangen freigegebenen Werkstücke ausüben. Die von den Stößeln auf den Endbereich der abzubremsenden Werkstücke ausgeübte Bremskraft hängt jedoch von der Größe des Andruckes an den Falzzangenzylinder ab, der reibend unter dem abgebremsten Werkstück hindurchläuft, so daß auf die beiden Seiten des Werkstückes unterschiedlich große und einander entgegengesetzte Reibkräfte wirken, die das Werkstück verzerren können, was insbesondere dann nachteilig ist, wenn dieses dünn- und/oder doppelwandig ausgebildet ist, wie es beispielsweise bei Beuteln oder Säcken der Fall ist.In order to avoid wavy, kinking or folding of the workpieces set down on the stacking table with their leading edges, a plunger provided with elastic cushions and provided with elastic cushions are provided in a device of the type specified at the outset which is known from DE-B 10 54 818 in time with the placement of the workpieces on the circumference of the folding pliers cylinder be made in such a way that they exert a braking torque on the workpieces released by the folding pliers. However, the braking force exerted by the tappets on the end region of the workpieces to be braked depends on the size of the pressure on the folding pincer cylinder, which runs frictionally under the braked workpiece, so that differently sized and opposite frictional forces act on the two sides of the workpiece Can distort workpiece, which is particularly disadvantageous if it is thin and / or double-walled, as is the case for example with bags or sacks.

Aus GB-A-857 769 ist eine Vorrichtung bekannt, die einzeln nacheinander zugeführte flache Werkstücke in eine sog. Schuppenformation auf einem weiterführenden Förderer überführt. Um die Werkstücke mit gleichem Schuppenabstand übergeben zu können, ist ein die zu überführenden Werkstücke übernehmendes Transportrad vorgesehen, das mit einem Paar fester Sauger und einem Paar beweglicher Sauger versehen ist. Dabei wirken die Sauger derart zusammen, daß die zugeführten und in Schuppenformation zu überführenden Werkstücke zunächst von den festen Saugern ergriffen werden, die diese mit der Umfangsgeschwindigkeit des Transportrades mitnehmen. Zu einem vorbestimmten Zeitpunkt geben die festen Sauger die vorlaufenden Enden der Werkstücke frei, wobei diese dann nur noch von den die nachlaufenden Enden haltenden Saugern gehalten werden. Diese Sauger führen eine gesteuerte gegenläufige Schwenkbewegung aus, die zu einer Verzögerung der Werkstücke führt und den Zweck hat, die Werkstücke zu verzögern und mit vorgegebenem Abstand auf das weiterfördernde Schuppenband abzulegen.From GB-A-857 769 a device is known which converts flat workpieces fed one after the other into a so-called scale formation on a further conveyor. In order to be able to transfer the workpieces with the same scale spacing, a transport wheel is provided which takes over the workpieces to be transferred and which is provided with a pair of fixed suction cups and a pair of movable suction cups. The suction cups work together in such a way that the workpieces that are fed in and are to be transferred in scale form are first gripped by the fixed suction cups, which take them along with the peripheral speed of the transport wheel. At a predetermined point in time, the fixed suction cups release the leading ends of the workpieces, which are then only held by the suction cups holding the trailing ends. These suction cups carry out a controlled counter-rotating movement, which leads to a deceleration of the workpieces and has the purpose of decelerating the workpieces and placing them on the conveying scale belt at a predetermined distance.

Aufgabe der Erfindung ist es, eine Vorrichtung der eingangs angegebenen Art zu schaffen, mit der sich Werkstücke oder Beutel schonend in der Weise abbremsen lassen, daß sie im wesentlichen stoßfrei auf den Stapeltisch abgesetzt werden können.The object of the invention is to provide a device of the type mentioned, with which workpieces or bags can be gently braked in such a way that they essentially can be placed on the stacking table without bumps.

Erfindungsgemäß wird diese Aufgabe durch einen ersten Vorschlag bei einer Vorrichtung der eingangs angegebenen Art durch die kennzeichnenden Merkmale des Patentanspruchs 1 gelöst.According to the invention, this object is achieved by a first proposal in a device of the type specified at the outset by the characterizing features of patent claim 1.

Die erfindungsgemäße Vorrichtung ermöglicht es somit, auch Werkstücke aus weichem Material oder Beutel aus dünnem, lappigen oder knitterndem Material mit hoher Leistung, also hoher Taktzahl, herzustellen und nahezu stoßfrei auf die Stapelunterlage abzusetzen.The device according to the invention thus makes it possible to produce workpieces made of soft material or bags made of thin, lobed or wrinkled material with a high output, that is to say a high number of cycles, and to deposit them on the stacking pad almost without bumps.

Die Steuerkurve ist zweckmäßigerweise derart gestaltet, daß sie die Sauger in Richtung auf den Ablagetisch bis auf null oder nahezu null verzögert.The control curve is expediently designed in such a way that it decelerates the suction cups towards zero or almost zero in the direction of the storage table.

Die Sauger heben das Werkstück von dem Transportzylinder ab, so daß diese nicht mehr dem kreisförmigen Förderweg des Transportzylinders folgen und in tangentialer Richtung zu dem Transportzylinder auf die Stapelunterlage abgesetzt werden können. Dieses Abheben begünstigt das Absetzen der Werkstücke hinter üblicher Weise an der Stapelunterlage vorgesehene, senkrecht zu dieser stehende Abweisfinger, die in Umfangsnuten des Transportzylinders greifen.The suction cups lift the workpiece from the transport cylinder so that they no longer follow the circular conveying path of the transport cylinder and can be placed on the stacking pad in the tangential direction to the transport cylinder. This lifting favors the setting down of the workpieces behind normal deflection fingers provided on the stacking pad, which are perpendicular to the stacking pad and engage in circumferential grooves of the transport cylinder.

Die Saugluftzufuhr zu den Saugern wird zweckmäßigerweise so gesteuert, daß diese bei oder kurz vor dem Auftreffen der Stellkanten der Werkstücke auf den Stapeltisch unterbrochen wird. Die Unterbrechung erfolgt zweckmäßigerweise in dem Zeitpunkt, in dem die Sauger relativ zu der Stapelunterlage ihre geringste Geschwindigkeit oder sogar die Geschwindigkeit null erreicht haben.The suction air supply to the suction devices is expediently controlled in such a way that it is interrupted when or shortly before the setting edges of the workpieces hit the stacking table. The interruption expediently takes place at the point in time at which the suction devices have reached their lowest speed or even the speed zero relative to the stacking base.

Um zu verhindern, daß die Saugerrohre während des ungesteuerten Umlaufs mit dem Transportzylinder frei schwenken können, sind diese oder mit diesen oder der Saugerwelle verbundene Anschlagteile vorgesehen, die außerhalb des Wirkungsbereiches der Steuerkurve unter Federkraft an einem Widerlager des Transportzylinders anliegen.In order to prevent that the suction pipes can pivot freely during the uncontrolled rotation with the transport cylinder, these or with these or the suction shaft connected stop parts are provided, which rest under spring force on an abutment of the transport cylinder outside the effective range of the control curve.

Nach einem zweiten Vorschlag wird die Aufgabe erfindungsgemäß durch die kennzeichnenden Merkmale des Patentanspruchs 2 gelöst.According to a second proposal, the object is achieved according to the invention by the characterizing features of patent claim 2.

Zweckmäßigerweise greifen das oder die Saugbänder teilweise in Umfangsnuten des Transportzylinders, so daß ein störungsfreier Auflauf der vorauslaufenden Kanten der von den Transportzangen freigegebenen Werkstücke auf das oder die Saugbänder gewährleistet ist.Advantageously, the suction belt or belts partially engage in circumferential grooves of the transport cylinder, so that a trouble-free run-up of the leading edges of the workpieces released by the transport tongs onto the suction belt or belts is ensured.

Zweckmäßigerweise sind die Geschwindigkeit der Saugbänder und die Saugluftzufuhr zu diesen steuerbar. Dabei ist die Steuerung derart, daß das oder die Saugbänder nach dem Ansaugen des vorauslaufenden Bereichs der Werkstücke eine diese verzögernde Bewegung ausführen, wobei die Saugluftzufuhr bei oder kurz vor dem Aufsetzen der Werkstücke auf die Stapelunterlage unterbrochen wird.The speed of the suction belts and the suction air supply to them can expediently be controlled. The control system is such that the suction belt or belts, after sucking in the leading area of the workpieces, perform a movement which delays them, the suction air supply being interrupted at or shortly before the workpieces are placed on the stacking pad becomes.

In weiterer Ausgestaltung der Erfindung ist vorgesehen, daß an den Transportzylinder eine Transportrolle anstellbar ist, die das Werkstück nach Freigabe durch die Haltezangen nachschiebend fördert.In a further embodiment of the invention it is provided that a transport roller can be set on the transport cylinder, which feeds the workpiece after release by the holding tongs.

Ausführungsbeispiele der Erfindung werden nachstehend anhand der Zeichnung näher erläutert. In dieser zeigt

Fig. 1
eine Seitenansicht einer Vorrichtung zum Herstellen und Stapeln von mit umgefalteten und geklebten Böden versehenen Beuteln oder Säcken in schematischer Darstellung,
Fig. 2
eine der Fig. 1 entsprechende Darstellung der Vorrichtung, in der sich die dem Abbremsen der abzusetzenden Beutel oder Säcke dienende Saugerreihe in einer Stellung befinden, in der die Sauger diese gerade freigeben, und
Fig. 3
eine andere Ausführungsform einer Vorrichtung zum Herstellen und Sammeln von Beuteln oder Säcken in schematischer Seitenansicht.
Embodiments of the invention are explained below with reference to the drawing. In this shows
Fig. 1
1 shows a side view of a device for producing and stacking bags or sacks provided with folded and glued bottoms, in a schematic illustration,
Fig. 2
one of the Fig. 1 corresponding representation of the device in which the row of suction pads for braking the bags or sacks to be put down are in a position in which the suction devices are just releasing them, and
Fig. 3
another embodiment of a device for producing and collecting bags or sacks in a schematic side view.

Mit der in Fig. 1 schematisch dargestellten Vorrichtung werden ausgehend von einer Schlauchbahn, beispielsweise von einer mit einer Längsklebenaht versehenen Papierschlauchbahn, Beutel oder Säcke hergestellt, die mit umgelegten und geklebten Bodenfalzen versehen sind. Die Schlauchbahn 1 kann mit Seitenfalten versehen sein, wobei die Wandungen mit zueinander versetzten Perforationslinien versehen sind, so daß sich nach dem Abreißen von Beutelabschnitten von der Schlauchbahn 1 Abschnitte ergeben, bei denen die offenen Enden einander überlappen.With the device shown schematically in FIG. 1, starting from a tubular web, for example from a paper tubular web provided with a longitudinal adhesive seam, bags or sacks are produced, which are provided with folded and glued bottom folds. The tubular web 1 can be provided with side gussets, the walls being provided with perforation lines offset from one another, so that after tearing off bag sections from the tubular web 1, sections result in which the open ends overlap one another.

Die Schlauchbahn 1 wird durch das Transportrollenpaar 4 vorgezogen und in Richtung des Pfeils 2 auf dem Tisch 3 gefördert. Durch die beiden Abreißrollenpaare 5,6 werden dann entlang den Querperforationslinien von der Schlauchbahn 1 Sack- oder Beutelwerkstücke abgerissen, wenn sich die Querperforationslinien zwischen den Walzenpaaren 5,6 befinden. Zum Abreißen wird die Schlauchbahn von dem Walzenpaar 5 gehalten, während das Walzenpaar 6, um die Abreißspannung zu erzeugen, kurzfristig mit höherer Geschwindigkeit umläuft.The tubular web 1 is advanced by the pair of transport rollers 4 and promoted in the direction of arrow 2 on the table 3. The two tear-off roller pairs 5, 6 then tear off sack or bag workpieces along the transverse perforation lines from the tubular web 1 when the cross perforation lines are between the roller pairs 5, 6. For tearing off, the tube web is held by the pair of rollers 5, while the pair of rollers 6, in order to generate the tearing tension, rotates briefly at a higher speed.

Die abgerissenen Abschnitte werden dann auf dem Falzzangenzylinder 30 mit gefalzten und geklebten Böden versehen und zu ihrer Sammlung oder Stapelung senkrecht stehend auf dem Stapeltisch 31 abgesetzt.The torn off sections are then provided on the folding pliers cylinder 30 with folded and glued bottoms and placed vertically on the stacking table 31 for their collection or stacking.

Der Falzzangenzylinder 30 ist mit drei sog. Falzbalken bildenden Widerlagern 12,12',12'' versehen, die zangenartig mit den schwenkbaren Falzzangenbacken 13,13' zusammenwirken, die um an dem Falzzangenzylinder 30 gelagerte Schwenkachsen 14 schwenkbar und durch nicht dargestellte Federn in Richtung auf ihre Schließstellung beaufschlagt sind. Um die Falzzangen öffnen und schließen zu können, sind diese mit Betätigungshebeln 15 versehen, die endseitig Nockenrollen 16 tragen.The folding pliers cylinder 30 is provided with three so-called folding beam abutments 12, 12 ', 12' 'which cooperate like pliers with the pivotable folding pliers jaws 13, 13', which can be pivoted about pivot axes 14 mounted on the folding pliers cylinder 30 and in the direction by springs, not shown are applied to their closed position. In order to be able to open and close the folding tongs, they are provided with actuating levers 15 which carry cam rollers 16 at the ends.

Zum Öffnen der Falzzangen 12,13 laufen die Nockenrollen 16 auf eine gestellfeste Steuerkurve 17 auf, die die Falzzangen zur Freigabe der gefalzten Böden vor dem Absetzen der Beutel oder Säcke öffnet, wie es aus der Falzzange 12',13' ersichtlich ist.To open the folding tongs 12, 13, the cam rollers 16 run onto a control cam 17 which is fixed to the frame and which opens the folding tongs to release the folded bottoms before the bags or sacks are set down, as can be seen from the folding tongs 12 ', 13'.

In dem Falzzangenzylinder 30 ist exzentrisch zur Drehachse 20 ein Saugrohr 32 schwenkbar gelagert, dessen Schwenkachse 19 parallel zur Falzzangenachse 20 verläuft. Das Saugrohr 22 ist mit einem Betätigungshebel 21 versehen, der endseitig eine Nockenrolle 22 trägt. Mit dem Saugrohr 32 sind in einer radialen Ebene Saugrohre 18 verbunden, die endseitig Saugdüsen 33 tragen. Die Saugrohre 18 sind mit Zugfedern 25 verbunden, deren anderen Enden auf Zapfen 26 fest mit dem Falzzangenzylinder verbunden sind. Durch die Zugfedern 25 werden die Saugrohre 18 in Anlage an Falzzangenzylinder feste Anschläge 24 gehalten bzw. in Richtung auf diese beaufschlagt.A suction pipe 32 is pivotally mounted eccentrically to the axis of rotation 20 in the folding pinch cylinder 30, the pivot axis 19 of which extends parallel to the folding pin axis 20. The suction pipe 22 is provided with an actuating lever 21 which carries a cam roller 22 at the end. Suction pipes 18 are connected to the suction pipe 32 in a radial plane and carry suction nozzles 33 at the end. The suction tubes 18 are connected to tension springs 25, the other ends of which are firmly connected to the folding pincer cylinder by means of pins 26 are. By means of the tension springs 25, the suction tubes 18 are held in abutment against folding jaw cylinders, fixed stops 24 or acted upon in the direction thereof.

Über einen Teil ihres Umlaufs laufen die Nockenrollen 22 der die Sauger betätigenden Hebel 21 auf Steuerkurven 23 auf, wobei die Kurvencharakteristik der Steuerkurve 23 und die Exzentrizität der Achse 19 des Saugrohres 22 so gewählt ist, daß sich die Saugdüsen 33 aus der Zylinderfläche des Falzzangenzylinders 30 herausbewegen, sobald sich die Saugdüsen 33 etwa senkrecht oberhalb des Ablagetisches 33 befinden, und sodann eine etwa tangentiale Bewegung ausführen, die senkrecht auf der Stellfläche des Ablagetisches 31 steht.The cam rollers 22 of the levers 21 actuating the suction cup run on control cams 23 over part of their rotation, the curve characteristic of the control curve 23 and the eccentricity of the axis 19 of the suction pipe 22 being selected such that the suction nozzles 33 emerge from the cylinder surface of the folding pliers cylinder 30 move out as soon as the suction nozzles 33 are located approximately vertically above the storage table 33, and then execute an approximately tangential movement which is perpendicular to the footprint of the storage table 31.

Der Ablagetisch 31 ist an den Falzzangenzylinder 30 unterhalb von dessen waagrecht liegender Durchmesserebene angeordnet und weist senkrecht aufragende Abweisfinger 36 auf, die in Umfangsnuten des Falzzangenzylinders greifen.The storage table 31 is arranged on the folding pliers cylinder 30 below its horizontal diameter plane and has vertically projecting deflecting fingers 36 which engage in circumferential grooves of the folding pliers cylinder.

An dem Falzzangenzylinder 30 ist ein Falzmesserzylinder 7 angestellt, der mit einem längs einer Mantellinie verlaufenden Falzmesser 11 versehen ist. Dicht hinter dem Falzmesser 11 ist der Falzmesserzylinder 7 mit einem Stempel 10 versehen, der von einer Leimwalze 8, die einen Leimkasten 9 abschließt, einen Leimstreifen abnimmt und formatmäßig auf die Sackwerkstücke überträgt.A folding knife cylinder 7 is provided on the folding pliers cylinder 30, which is provided with a folding knife 11 running along a surface line. Immediately behind the folding knife 11, the folding knife cylinder 7 is provided with a stamp 10, which removes a glue strip from a glue roller 8, which closes a glue box 9, and transfers it in format to the bag workpieces.

Die zwischen dem Falzmesserzylinder und dem Falzzangenzylinder hindurchlaufenden abgerissenen Schlauchabschnitte werden im Bereich ihrer vorauslaufenden Enden unter Bildung eines Falzes zwischen die Backen 12,13 der geschlossenen Falzzange eingedrückt, wobei gleichzeitig infolge des Leimauftrages eine Verklebung des umgelegten Falzes mit einer Sackwand erfolgt.The torn off hose sections running between the folding knife cylinder and the folding pliers cylinder are pressed in the area of their leading ends to form a fold between the jaws 12, 13 of the closed folding pliers, with the folded fold being glued to a sack wall at the same time as a result of the glue application.

Die in dieser Weise auf dem Falzzangenzylinder mit gefalzten und geklebten Böden versehenen und geförderten Säcke werden sodann bei ihrem Weiterlauf von den Saugdüsen 33 angesaugt, wenn diese aufgrund der Steuerung des Saugrohres 32 und der Exzentrizität der Achse des Saugrohres 32 aus dem Hüllzylinder des Falzzangenzylinders heraustreten. Dabei führen die Saugrohre 18 infolge ihrer Steuerung durch die Steuerkurve 30 eine die angesaugten Säcke oder Beutel verzögernde Bewegung aus, so daß diese mit einer auf null oder nahezu auf null verzögerten Geschwindigkeit auf den Stapeltisch 31 abgesetzt werden.The bags provided and conveyed in this way on the folding pliers cylinder with folded and glued bottoms are then sucked in by the suction nozzles 33 when they continue to move when they emerge from the enveloping cylinder of the folding jaw cylinder due to the control of the suction tube 32 and the eccentricity of the axis of the suction tube 32. As a result of their control by the control cam 30, the suction tubes 18 execute a movement which delays the sacks or bags being sucked in, so that they are deposited on the stacking table 31 at a speed which is delayed to zero or almost to zero.

Die Saugluftzufuhr zu den Saugern 33 ist derart gesteuert, daß diese die Sackwerkstücke etwa in einem Bereich ansaugen, in dem die Sauger waagrecht liegen. Gleichzeitig öffnen die Falzzangen 12,13, so daß sich die gefalzten Böden von dem Falzzangenzylinder lösen und die Sauger den weiteren verzögerten Transport der Säcke bis zur Ablage auf dem Ablagetisch 31 übernehmen.The suction air supply to the suction cups 33 is controlled in such a way that they suck the bag workpieces approximately in an area in which the suction cups lie horizontally. At the same time, the folding tongs 12, 13 open so that the folded bottoms detach from the folding tongs cylinder and the suction cups take over the further delayed transport of the bags until they are placed on the tray table 31.

Wie aus Fig. 2 ersichtlich ist, führt die etwa tangentiale verzögernde Förderung der Säcke durch die Sauger dazu, daß diese sicher hinter den Abweisfingern 36 auf der Auflagefläche des Stapeltisches 31 abgesetzt werden.As can be seen from FIG. 2, the approximately tangential, delayed conveyance of the sacks by the suction cups means that they are securely placed behind the deflecting fingers 36 on the support surface of the stacking table 31.

Jedem der drei Falzzangen sind Sauger zugeordnet, von denen in der Zeichnung nur ein einziger dargestellt ist.Suction cups are assigned to each of the three folding pliers, of which only one is shown in the drawing.

Das die Saugrohre 18 beaufschlagende Vakuum wird vorzugsweise eingesteuert, kurz bevor die Falzzangen öffnen. Das Vakuum wird dann kurz bevor die Säcke auf den Stapeltisch 31 abgesetzt werden, wieder abgestellt.The vacuum acting on the suction tubes 18 is preferably activated shortly before the folding tongs open. The vacuum is then switched off again shortly before the bags are placed on the stacking table 31.

Bei der Ausführungsform nach Fig. 3 ist der Falzzangenzylinder 30 hinsichtlich der Falzzangen und ihrer Steuerung in der grundsätzlich gleichen Art aufgebaut wie der Falzzangenzylinder nach den Fig. 1 und 2. Das Ausführungsbeispiel nach der Fig. 3 unterscheidet sich jedoch von dem nach den Fig. 1 und 2 dadurch, daß statt der um exzentrische Achsen schwenkbaren Saugrohre ein Saugband 40 vorgesehen ist, dessen Fördertrum 41 über einen Saugkasten 42 läuft. Zweckmäßigerweise sind mehrere Saugbänder 40 vorgesehen, die, wie aus der Fig. 3 ersichtlich ist, in Umfangsnuten des Falzzangenzylinders 30 greifen. Bei dem Ausführungsbeispiel nach Fig. 3 laufen die mit den gefalzten Böden versehenen Enden nach ihrer Freigabe von den Falzzangen auf das Saugband 40 auf, wobei sie dann von den Fördertrumen 41 angesaugt werden, sobald sie über die Saugkästen 42 laufen. Die Saugbänder 40 und die Saugkästen 42 sind so gesteuert, daß die angesaugten Säcke bis auf die Geschwindigkeit null oder nahezu null verzögert werden. Kurz vor dem Absetzen der Säcke auf dem Stapeltisch 31 wird die Saugluftzufuhr zu den Saugkästen 12 abgestellt. Die Saugbandförderer 40 sind stationär in dem Maschinengestell angeordnet.In the embodiment according to FIG. 3, the folding pliers cylinder 30 is constructed in the same way as the folding pliers cylinder according to FIGS. 1 and 2 with regard to the folding pliers and their control. However, the exemplary embodiment according to FIG. 3 differs from that according to FIGS. 1 and 2 in that, instead of the suction pipes pivotable about eccentric axes, a suction belt 40 is provided, the conveyor run 41 of which is via a suction box 42 is running. A plurality of suction belts 40 are expediently provided, which, as can be seen from FIG. 3, engage in circumferential grooves of the folding pliers cylinder 30. In the embodiment according to FIG. 3, the ends provided with the folded bottoms run up after their release from the folding tongs onto the suction belt 40, whereby they are then sucked in by the conveying strands 41 as soon as they run over the suction boxes 42. The suction belts 40 and the suction boxes 42 are controlled in such a way that the sucked-in bags are decelerated to zero or almost zero speed. Shortly before the bags are placed on the stacking table 31, the suction air supply to the suction boxes 12 is switched off. The suction belt conveyors 40 are arranged stationary in the machine frame.

Um zu gewährleisten, daß die von den Falzzangen freigegebenen Säcke bis zu ihrem Auflauf auf die Saugbänder noch einwandfrei von dem Falzzangenzylinder gefördert werden, ist gegen den Falzzangenzylinder 30 eine federbelastete Transportrolle 44 angestellt. Der Abstand der Transportrolle 44 zu der oberen Umlenkrolle 45 des oder der Saugbandförderer 40 ist größer als die Länge eines Sackes, so daß bis zum Auflauf der mit den gefalzten Böden versehenen vorauslaufenden Enden der Säcke auf den Saugbandförderer 40 eine einwandfreie Förderung gewährleistet ist.In order to ensure that the bags released by the folding tongs are still properly conveyed by the folding tongs cylinder until they emerge on the suction belts, a spring-loaded transport roller 44 is set against the folding tongs cylinder 30. The distance between the transport roller 44 and the upper deflection roller 45 of the suction belt conveyor 40 is greater than the length of a sack, so that proper conveyance is ensured until the leading ends of the sacks provided with the folded bottoms emerge on the suction belt conveyor 40.

Claims (8)

  1. An apparatus for collecting or stacking flat workpieces conveyed on a conveyor cylinder (30) provided with holding grippers (12, 13) an a stacking table (31) placed against the conveyor cylinder (30) or on stacking arms placed against the latter which are parallel to each other, preferably bags or sacks produced on a cylinder (30) with folding grippers and provided with bonded bottoms, which is provided with a device (16, 17) opening the holding or folding grippers (12, 13) before the delivery table (31) has been reached, and with a device (33) braking the workpieces in such a way that the workpieces are deposited on the stacking table (31) at a speed slower than the peripheral speed of the conveyor cylinder or cylinder with folding grippers (12, 13).
    characterized in that
    the braking device consists of at least two suction tubes (18) carrying at their ends suction means (33) which are mounted for pivoting round a pin (19) of the conveyor cylinder (30) which extends eccentrically to the pin (20) of the conveyor cylinder and parallel to the latter, and are controlled in such a way that they execute a pivoting movement superposed on the rotational direction, delaying the bags sucked up by them; that the suction tubes (18) or the shaft carrying them are connected to a lever (21) carrying at its end a sliding block or a roller (22) which run up on a control cam (23) fixed to the stand; and that the curve characteristic of the control cam (23) and the eccentricity of the pin (19) of the suction tube (22) are chosen in such a way that the suction nozzles (33) move out of the cylindrical surface of the cylinder (30) with folding grippers as soon as the suction nozzles (33) are situated approximately vertically above the delivery table (31) and that they then execute an approximately tangential movement which is disposed perpendicularly to the depositing face of the delivery table (31).
  2. An apparatus for collecting or stacking flat workpieces conveyed on a conveyor cylinder (30) provided with holding grippers (12, 13) on a stacking table (31) placed against the conveyor cylinder (30) or on stacking arms placed against the latter, which are parallel to each other, preferably bags or sacks produced on a cylinder (30) with folding grippers and provided with bonded bottoms, which is provided with a device (16, 17) opening the holding or folding grippers (12, 13) before the delivery table (31) has been reached, and with a device (33) braking the workpieces in such a way that the workpieces are deposited on the stacking table (31) at a speed slower than the peripheral speed of the conveyor cylinder or cylinder with folding gripper (12, 13).
    characterized in that
    the braking device consists of at least one suction belt (40) set approximately tangentially against the conveyor cylinder (30), the conveying side (41) of which belt running over a suction box (42) extends approximately at right angles to the delivery table (31).
  3. An apparatus according to claim 1, characterized in that the control cam (23) is formed in such a way that it delays the suction means (33) in the direction towards the delivery table (31) down to a speed of zero, or almost zero.
  4. An apparatus according to one of claims 1 or 3, characterized in that the vacuum feed to the suction nozzles (33) is interrupted when, or shortly before, the positioning edges of the tools bear on the stacking table.
  5. An apparatus according to one of claims 1 or 3 and 4, characterized in that the suction tubes (18), or striking components connected thereto or to the shaft carrying them, bear outside the sphere of action of the control cam (23) under a spring force on a bearing means (24) of the conveyor cylinder (30).
  6. An apparatus according to claim 2, characterized in that the suction belt or suction belts (40) partly engage in peripheral grooves of the conveyor cylinder (30).
  7. An apparatus according to claim 2 or 6, characterized in that the speed of the suction belts (40) and vacuum feed to them are controllable.
  8. An apparatus according to one of claims 2 or 6 and 7, characterized in that a conveyor roller (44) can be set against the conveyor cylinder (30), which conveys the workpiece with a pushing-on action after it has been released by the holding grippers (12, 13).
EP92109388A 1991-07-15 1992-06-03 Apparatus for collecting or stacking flat workpieces on a stacking table Expired - Lifetime EP0528126B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4123399A DE4123399A1 (en) 1991-07-15 1991-07-15 DEVICE FOR COLLECTING OR STACKING FLAT WORKPIECES ON A STACKING TABLE
DE4123399 1991-07-15

Publications (2)

Publication Number Publication Date
EP0528126A1 EP0528126A1 (en) 1993-02-24
EP0528126B1 true EP0528126B1 (en) 1995-12-06

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EP92109388A Expired - Lifetime EP0528126B1 (en) 1991-07-15 1992-06-03 Apparatus for collecting or stacking flat workpieces on a stacking table

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US (1) US5308056A (en)
EP (1) EP0528126B1 (en)
JP (1) JP3354962B2 (en)
DE (2) DE4123399A1 (en)

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DE102006029140B3 (en) * 2006-06-24 2008-01-03 Windmöller & Hölscher Kg Apparatus and method for arranging flat workpieces on a collecting table

Also Published As

Publication number Publication date
JPH05193808A (en) 1993-08-03
US5308056A (en) 1994-05-03
DE4123399A1 (en) 1993-01-21
JP3354962B2 (en) 2002-12-09
EP0528126A1 (en) 1993-02-24
DE59204567D1 (en) 1996-01-18

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