EP0239857B1 - Device for stacking flat objects, especially double bags made of a plastics film - Google Patents

Device for stacking flat objects, especially double bags made of a plastics film Download PDF

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Publication number
EP0239857B1
EP0239857B1 EP87103776A EP87103776A EP0239857B1 EP 0239857 B1 EP0239857 B1 EP 0239857B1 EP 87103776 A EP87103776 A EP 87103776A EP 87103776 A EP87103776 A EP 87103776A EP 0239857 B1 EP0239857 B1 EP 0239857B1
Authority
EP
European Patent Office
Prior art keywords
stacking
clamping
upper jaws
fixed
holding
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
EP87103776A
Other languages
German (de)
French (fr)
Other versions
EP0239857A3 (en
EP0239857A2 (en
Inventor
Fritz 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 date
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Publication of EP0239857A2 publication Critical patent/EP0239857A2/en
Publication of EP0239857A3 publication Critical patent/EP0239857A3/en
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Classifications

    • 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
    • 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
    • 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
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • 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
    • B31B70/984—Stacking bags on wicket pins
    • 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
    • B65H2701/12—Surface aspects
    • B65H2701/121—Perforations
    • B65H2701/1212—Perforations where perforations serve for handling
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/202—With product handling means
    • Y10T83/2033—Including means to form or hold pile of product pieces
    • Y10T83/2037—In stacked or packed relation
    • Y10T83/2057—Including means to deliver individual pieces to a stack holder
    • Y10T83/2059—With spindle to enter a hole or to make hole in product
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/202—With product handling means
    • Y10T83/2092—Means to move, guide, or permit free fall or flight of product
    • Y10T83/2183—Product mover including gripper means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/202—With product handling means
    • Y10T83/2092—Means to move, guide, or permit free fall or flight of product
    • Y10T83/2192—Endless conveyor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/283—With means to control or modify temperature of apparatus or work
    • Y10T83/293—Of tool
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/444—Tool engages work during dwell of intermittent workfeed
    • Y10T83/463—Work-feed element contacts and moves with work
    • Y10T83/4632—Comprises a work-moving gripper

Definitions

  • the invention relates to a device for stacking flat objects, preferably double bags welded from a plastic tubular or semi-tubular web, with opening edges lying in the region of their center line, according to the preamble of patent claim 1.
  • the double bags welded from a film tube by transverse weld separating seams are placed on stacking plates carried by endless chains, which have a row of stacking pins and / or spring-loaded clamps for receiving the bags on both sides of their longitudinal center line, which clamp the stacks after they have been formed on their central front edge regions in the conveying direction on the stacker.
  • a heated knife can be raised and lowered, which cuts the stack located in the separation station between the rows of stacking pins, the Stacking plate forms the abutment for the cutting knife. Since the stacking plates also form the abutments for the heated knives, these have to be made relatively large and heavy.
  • the known device is therefore relatively expensive because the endless chains must be provided with stacking plates at a distance from the stacks transported by them, which must meet the requirements as abutment plates for the cutting knife.
  • a pair of clamping pins must be provided during stacking, which are raised and lowered alternately or simultaneously after each double bag has been deposited in order to fix it on the stack that is being formed .
  • the clamp that holds the finished stack and engages the central front edge areas prevents the central separation of the stack by the separating knife into two partial stacks, so that expediently stacking pins are provided on both sides of the dividing line through stack holes, which in particular also hold the partial stack.
  • the object of the invention is to provide a device of the type mentioned, the stacking conveyor need only be able to cope with less stress, so that the device can be built more easily and therefore more economically. Furthermore, the device for fixing the finished stack should only have clamping means that do not hinder the central separating cut and also securely hold the separated partial stack on the stack conveyor.
  • the device according to the invention only needs to have simple, light pairs of conveyor belts or the like as a stacking conveyor, since the pairs of conveyor belts or the like only serve to convey and hold the stack and do not at the same time also carry the counter tools for the separation station at a distance from the stack and absorb the cutting pressure have to.
  • a holding plate with only two stacking pins or needles is provided in the stacking station.
  • the holding plate with the stacking pins is designed to be lowerable and only serves to stack each stack in the stacking station. If stacking needles are provided, the objects to be stacked or double bags need not be provided with punched-in positioning holes beforehand, since the objects are pierced by the needles during stacking.
  • the clamping means each consist of two holding tongs, one of which is attached to each of the two conveyor belts or the like, so that the space between these holding tongs remains free for the passage of the separating knife and no additional holding means for the separate partial stacks must be provided.
  • the stacking pins or needles are expediently heated so that they block the successively stacked double bags in the stack that is being formed.
  • the upper jaws of the holding tongs can be mounted on vertical legs of holding plates angled at right angles or of angular profiles about horizontal transverse axes, the other legs on the conveyor belt or the like. are attached and form the counter jaws for the upper jaws.
  • the ends of prestressed tension springs are fastened to fastening devices of the upper jaw and the vertical leg of the holding plates, for example holding pins or hooks, in such a way that their line of action when the upper jaw is pivoted from the clamping position into the open position and conversely passes through its pivot axis, so that the tension spring holds the top jaw in the clamping position or open position on both sides of the dead center position.
  • the upper jaw can be provided with an actuating cam on which the actuating devices for switching the upper jaw act.
  • the actuating devices can consist of frame-fixed run-up curves or also circuit boards or the like provided with drives.
  • a catfish is provided, which is provided with a drive (not shown) and which carries the transport arms 3, which are arranged in pairs and are provided with suction devices or gripping devices.
  • a cross welding separating device (not shown) for welding of bags arranged from a plastic tube or semi-tube web, from which the rotating pairs of transport arms 3 take over the finished double bags, which are still connected in their central region, and needle onto the stacking pins or needles 4, 5.
  • a horizontal shaft 6 is supported, which carries two deflection rollers 7 at a distance from one another symmetrically to the transverse center plane of the pairs of transport arms 3.
  • the horizontal shaft 8 is likewise mounted in a frame, which correspondingly carries a pair of deflection rollers 9 at the end.
  • the deflection rollers 7, 9 run two endless conveyor belts 10, 10 'in parallel and at a distance from each other.
  • a pair of rollers 7, 9 is provided with an intermittent drive, not shown.
  • a support plate 15 is provided between the winding arms 3 arranged in pairs, on which the stacking pins or needles 4, 5 are fastened at a distance from one another in the transverse center plane between the winding arms 3.
  • the support plate 15 is fastened in the middle to the piston rod 16 of the pressure medium-piston-cylinder unit 17.
  • the cylinder of the pressure medium-piston-cylinder unit 17 is connected to the horizontal leg of the angled support piece 18, which is welded to the base support 19 of the device.
  • the support plate 15 is provided parallel to the piston rod 16 for its guidance with a guide pin 20 which passes through a bore of the horizontal leg of the support piece 18 for its guidance.
  • the stacking needles 4, 5 are heated by a heating cartridge, to which the heating current is fed through the lines 22, 23.
  • the support plate 15 By actuating the pressure-piston-cylinder unit 17, the support plate 15 can be lowered so far that the tips of the stacking needles 4, 5 lie below the conveying plane of the conveyor belts 10.
  • the upper strands of the conveyor belts 10, 10 ' are supported on box section supports 25, 25' with smooth or polished tops.
  • the horizontal legs 26, 26' are riveted by angled sheets or connected in some other way.
  • the vertical legs 27, 27 'of the holding plates can rest against the mutually facing inner vertical walls of the box sections 25, 25' for their support and are provided with horizontal bearing journals 28, 28 'on which the upper jaws of the pliers are formed by double-angled pliers clips 29, 29 'are pivotally mounted.
  • the pliers brackets 29, 29 'are designed as double-armed angle levers, the shorter arm 31 forming the actuating lever which carries an end cam roller 32.
  • the pliers 29, 29 'and the vertical legs 27, 27' of the holding plates are provided with holding pins 34, 35, to which the ends of prestressed tension springs 36 are attached.
  • the holding pins 34, 35 are arranged such that the lines of action of the tension springs 36 when pivoting the clamp bracket 29, 29 'cut the pivot axis 28 from its clamping position into the open position.
  • Fig. 1 the first three clamps are in their clamped position, while the right clamp is pivoted into its open position. Since the tension springs 36 pass through the pivot axis 28 when the clamping bracket is switched from the clamping position into the open position, the clamping brackets are on both sides of the Dead center position is loaded either in the direction of its clamping position or in the direction of its open position by the tension springs 36.
  • circuit boards 40, 41 are provided, which in the stacking station S after the formation of a double bag stack 42, the clamping bracket from their open position in their Switch the closed position so that they clamp the respective stack of bags on the conveyor belts 10, 10 '.
  • a stack can be removed from the stacking station S when the stacking needles 4, 5 have been lowered and the stacking conveyor is then intermittently advanced by one step.
  • the circuit board 41 presses the cam roller 32 down, so that the clamp arms 29, 29 'are switched to their open position.
  • Pressure medium-piston-cylinder units 45, 46 which are fixed to the frame are provided for actuating the switching plates 40, 41.
  • two pressure medium-piston-cylinder units 50, 51 are attached above the gap formed between the box girders 25, 25 'to a frame-fixed carrier, the piston rods of which bear a heated separating knife 53, that in the longitudinal median plane between the carriers 25, 25' can be raised and lowered.
  • an abutment extending over the length of the stack 42 is arranged fixed to the frame, the surface of which is aligned with the conveying plane.
  • the width of the abutment is dimensioned so that it can be passed by the clamps and their actuating rollers.

Description

Die Erfindung betrifft eine Vorrichtung zum Stapeln von flachen Gegenständen, vorzugsweise von von einer Kunststoffschlauch- oder -halbschlauchbahn abgeschweißten Doppelbeuteln mit im Bereich von deren Mittellinie liegenden Öffnungsrändern, nach dem Oberbegriff des patentanspruchs 1.The invention relates to a device for stacking flat objects, preferably double bags welded from a plastic tubular or semi-tubular web, with opening edges lying in the region of their center line, according to the preamble of patent claim 1.

Bei einer aus der DE-GM 81 28 146 bekannten Vorrichtung dieser Art werden die von einem Folienschlauch durch Querschweißtrennnähte abgeschweißten Doppelbeutel auf von endlosen Ketten getragenen Stapelplatten abgelegt, die zur Aufnahme der Beutel beidseits ihrer Längsmittellinie eine Reihe von Stapelstiften und/oder federbelastete Klemmbügel aufweisen, die die Stapel nach ihrer Bildung an ihren in Förderrichtung mittleren vorderen Randbereichen auf dem Stapelförderer festklemmen. Zur Tennung der Beutelstapel ist ein beheiztes heb- und absenkbares Messer vorgesehen, das die in der Trennstation befindlichen Stapel zwischen den Reihen der Stapelstifte durchtrennt, wobei die Stapelplatte das Widerlager für das Trennmesser bildet. Da die Stapelplatten zugleich auch die Widerlager für die beheizten Messer bilden, müssen diese relativ groß und schwer ausgebildet werden. Die bekannte Vorrichtung ist daher verhältnismäßig aufwendig, weil die endlosen Ketten im Abstand der von diesen transportierten Stapel mit Stapelplatten versehen werden müssen, die den Anforderungen als Widerlagerplatten für das Schneidmesser genügen müssen.In a device of this type known from DE-GM 81 28 146, the double bags welded from a film tube by transverse weld separating seams are placed on stacking plates carried by endless chains, which have a row of stacking pins and / or spring-loaded clamps for receiving the bags on both sides of their longitudinal center line, which clamp the stacks after they have been formed on their central front edge regions in the conveying direction on the stacker. To separate the stack of bags, a heated knife can be raised and lowered, which cuts the stack located in the separation station between the rows of stacking pins, the Stacking plate forms the abutment for the cutting knife. Since the stacking plates also form the abutments for the heated knives, these have to be made relatively large and heavy. The known device is therefore relatively expensive because the endless chains must be provided with stacking plates at a distance from the stacks transported by them, which must meet the requirements as abutment plates for the cutting knife.

Werden die Beutelstapel durch an deren vorderen Rändern angreifende Klemmittel auf dem Stapelförderer gehalten, muß während des Stapelns ein paar von Klemmstiften vorgesehen werden, die im Wechsel oder gleichzeitig nach Ablage eines jeden Doppelbeutels angehoben und wieder abgesenkt werden, um diesen auf dem sich bildenden Stapel festzulegen.If the stacks of bags are held on the stacking conveyor by clamping means acting on their front edges, a pair of clamping pins must be provided during stacking, which are raised and lowered alternately or simultaneously after each double bag has been deposited in order to fix it on the stack that is being formed .

Der die fertigen Stapel festhaltende, an deren mittleren vorderen Randbereichen angreifende Klemmbügel beindert jedoch das mittige Trennen der Stapel durch das Trennmesser in zwei Teilstapel, so daß zweckmäßigerweise wiederum beidseits der Trennlinie durch Stapellöcher greifende Stapelstifte vorgesehen sind, die insbesondere auch die Teilstapel halten.However, the clamp that holds the finished stack and engages the central front edge areas prevents the central separation of the stack by the separating knife into two partial stacks, so that expediently stacking pins are provided on both sides of the dividing line through stack holes, which in particular also hold the partial stack.

Aufgabe der Erfindung ist es, eine Vorrichtung der eingangs angegebenen Art zu schaffen, deren Stapelförderer nur geringeren Beanspruchungen gewachsen zu sein braucht, so daß sich die Vorrichtung leichter und damit wirtschaftlicher bauen läßt. Weiterhin soll die Vorrichtung zur Fixierung der fertigen Stapel nur Klemmittel aufweisen, die den mittigen Trennschnitt nicht behindern und auch die getrennten Teilstapel sicher auf dem Stapelförderer haltern.The object of the invention is to provide a device of the type mentioned, the stacking conveyor need only be able to cope with less stress, so that the device can be built more easily and therefore more economically. Furthermore, the device for fixing the finished stack should only have clamping means that do not hinder the central separating cut and also securely hold the separated partial stack on the stack conveyor.

Erfindungsgemäß wird diese Aufgabe durch die kennzeichnenden Merkmale des Patentanspruchs 1 gelöst.According to the invention, this object is achieved by the characterizing features of patent claim 1.

Die erfindungsgemäße Vorrichtung braucht lediglich einfache, leichte Förderbandpaare o. dgl. als Stapelförderer aufzuweisen, da die Förderbandpaare o. dgl. nur dem Fördern und Halten der Stapel dienen und nicht zugleich auch im Abstand der Stapel die Gegenwerkzeuge für die Trennstation tragen und den Schneiddruck aufnehmen müssen. Bei der erfindungsgemäßen Vorrichtung ist in der Stapelstation lediglich eine Halteplatte mit nur zwei Stapelstiften oder -nadeln vorgesehen. Die Halteplatte mit den Stapelstiften ist absenkbar ausgebildet und dient nur der Stapelung jedes Stapels in der Stapelstation. Sind Stapelnadeln vorgesehen, brauchen die zu stapelnden Gegenstände oder Doppelbeutel zuvor nicht mit eingestanzten Positionierlöchern versehen zu werden, da die Gegenstande von den Nadeln beim Stapeln durchstochen werden.The device according to the invention only needs to have simple, light pairs of conveyor belts or the like as a stacking conveyor, since the pairs of conveyor belts or the like only serve to convey and hold the stack and do not at the same time also carry the counter tools for the separation station at a distance from the stack and absorb the cutting pressure have to. In the device according to the invention, only a holding plate with only two stacking pins or needles is provided in the stacking station. The holding plate with the stacking pins is designed to be lowerable and only serves to stack each stack in the stacking station. If stacking needles are provided, the objects to be stacked or double bags need not be provided with punched-in positioning holes beforehand, since the objects are pierced by the needles during stacking.

In der Trennstation ist ein gestellfestes Widerlager für das Trennmesser vorgesehen, so daß die Stapel nicht unter Zwischenlage der Bänder o. dgl. des Stapelförderers getrennt werden müssen. Bei der erfindungsgemäßen Vorrichtung bestehen die Klemmittel aus jeweils zwei Haltezangen, von denen je eine an den beiden Förderbändern o. dgl. befestigt ist, so daß der Zwischenraum auch zwischen diesen Haltezangen für den Durchgang des Trennmessers frei bleibt und nicht zusätzliche Haltemittel für die getrennten Teilstapel vorgesehen werden müssen.In the separating station, an abutment which is fixed to the frame is provided for the separating knife, so that the stacks do not have to be separated with the interposition of the belts or the like of the stacking conveyor. In the device according to the invention, the clamping means each consist of two holding tongs, one of which is attached to each of the two conveyor belts or the like, so that the space between these holding tongs remains free for the passage of the separating knife and no additional holding means for the separate partial stacks must be provided.

Zweckmäßigerweise sind die Stapelstifte oder -nadeln beheizt, so daß sie die aufeinanderfolgend gestapelten Doppelbeutel in dem sich bildenden Stapel miteinander verblocken.The stacking pins or needles are expediently heated so that they block the successively stacked double bags in the stack that is being formed.

Die Oberbacken der Haltezangen können an vertilkalen Schenkeln von rechtwinkelig abgewinkelten Halteblechen oder von winkeligen Profilen um horizontale Querachsen schwenkbar gelagert sein, wobei die anderen Schenkel auf dem Förderband o. dbl. befestigt sind und die Gegenbacken für die Oberbacken bilden.The upper jaws of the holding tongs can be mounted on vertical legs of holding plates angled at right angles or of angular profiles about horizontal transverse axes, the other legs on the conveyor belt or the like. are attached and form the counter jaws for the upper jaws.

Nach einer bevorzugten Ausführungsform ist vorgesehen, daß an Befestigungseinrichtungen des Oberbackens und des vertikalen Schenkels der Haltebleche, beispielsweise an Haltestiften oder -haken, jeweils die Enden vorgespannter Zugfedern in der Weise befestigt sind, daß deren Wirkungslinie beim Verschwenken des Oberbackens von der Klemmstellung in die Öffnungsstellung und umgekehrt dessen Schwenkachse durchsetzt, so daß die Zugfeder beidseits der Totpunktstellung den Oberbacken in der Klemmstellung oder Öffnungsstellung hält. Der Oberbacken kann mit einem Betätigungsnocken versehen sein, an dem die Betätigungseinrichtungen zur Umschaltung des Oberbackens angreifen. Die Betätigungseinrichtungen können aus gestellfesten Auflaufkurven oder aber auch mit Antrieben versehenen Schaltplatten oder dergleichen bestehen.According to a preferred embodiment, it is provided that the ends of prestressed tension springs are fastened to fastening devices of the upper jaw and the vertical leg of the holding plates, for example holding pins or hooks, in such a way that their line of action when the upper jaw is pivoted from the clamping position into the open position and conversely passes through its pivot axis, so that the tension spring holds the top jaw in the clamping position or open position on both sides of the dead center position. The upper jaw can be provided with an actuating cam on which the actuating devices for switching the upper jaw act. The actuating devices can consist of frame-fixed run-up curves or also circuit boards or the like provided with drives.

Ein Ausführungsbeispiel der Erfindung wird nachstehend anhand der Zeichnung näher erläutert. In dieser zeigen

  • Fig. 1 eine Seitenansicht der Stapelvorrichtung,
  • Fig. 2 einen Schnitt durch die Stapelvorrichtung längs der Linie E - F in Fig. 1 und
  • Fig. 3 eine F=Draufsicht auf die Stapelstation in Richtung des Pfeils G in Fig. 1.
An embodiment of the invention is explained below with reference to the drawing. In this show
  • 1 is a side view of the stacking device,
  • Fig. 2 shows a section through the stacking device along the line E - F in Fig. 1 and
  • 3 shows an F = top view of the stacking station in the direction of arrow G in FIG. 1.

In Seitenteilen 1 des Wicketergestells ist eine mit einem nicht dargestellten Antrieb versehene Welse gelagert, die die paarweise angeordneten und mit Saugern oder Greifeinrichtungen versehenen Transportarme 3 trägt. Vor dem Wicketergestell ist eine nicht dargestellte Querschweißtrenneinrichtung zum Abschweißen von Beuteln von einer Kunststoffschlauch- oder Halbschlauchbahn angeordnet, von der die rotierenden Transportarmpaare 3 die fertigen, aber in ihrem mittleren Bereich noch zusammenhängenden Doppelbeutel übernehmen und auf die Stapelstifte oder -nadeln 4, 5 aufnadeln.In the side parts 1 of the winder frame, a catfish is provided, which is provided with a drive (not shown) and which carries the transport arms 3, which are arranged in pairs and are provided with suction devices or gripping devices. In front of the winder frame there is a cross welding separating device (not shown) for welding of bags arranged from a plastic tube or semi-tube web, from which the rotating pairs of transport arms 3 take over the finished double bags, which are still connected in their central region, and needle onto the stacking pins or needles 4, 5.

In den Seitenteilen 1 oder seitlichen Lagerstücken des Wicketergestells ist eine horizontale Welle 6 gelagert, die symmetrisch zur Quermittelebene der Transportarmpaare 3 im Abstand voneinander zwei Umlenkrollen 7 trägt. Am Ende der Stapelvorrichtung ist in einem Gestell ebenfalls die horizontale Welle 8 gelagert, die entsprechend ein Paar endseitiger Umlenkrollen 9 trägt. Um die Umlenkrollen 7, 9 laufen zwei endlose Förderriemen 10, 10′ parallel und im Abstand voneinander um. Ein Rollenpaar 7, 9 ist mit einem nicht dargestellten intermittierenden Antrieb versehen.In the side parts 1 or lateral bearing pieces of the winding frame, a horizontal shaft 6 is supported, which carries two deflection rollers 7 at a distance from one another symmetrically to the transverse center plane of the pairs of transport arms 3. At the end of the stacking device, the horizontal shaft 8 is likewise mounted in a frame, which correspondingly carries a pair of deflection rollers 9 at the end. Around the deflection rollers 7, 9 run two endless conveyor belts 10, 10 'in parallel and at a distance from each other. A pair of rollers 7, 9 is provided with an intermittent drive, not shown.

In der Stapelstation S ist zwischen den paarweise angeordneten Wicketerarmen 3 eine Tragplatte 15 vorgesehen, auf der in der Quermittelebene zwishcen den Wicketerarmen 3 im Abstand voneinander die Stapelstifte oder -nadeln 4, 5 befestig sind. Die Tragplatte 15 ist in ihrer Mitte an der Kolbenstange 16 der Druckmittel-Kolben-Zylindereinheit 17 befestigt.In the stacking station S, a support plate 15 is provided between the winding arms 3 arranged in pairs, on which the stacking pins or needles 4, 5 are fastened at a distance from one another in the transverse center plane between the winding arms 3. The support plate 15 is fastened in the middle to the piston rod 16 of the pressure medium-piston-cylinder unit 17.

Der Zylinder der Druckmittel-Kolben-Zylindereinheit 17 ist mit dem waagerechten Schenkel des abgewinkelten Tragstücks 18 verbunden, der mit dem Grundträger 19 der Vorrichtung verschweißt ist. Die Tragplatte 15 ist zu ihrer Führung parallel zu der Kolbenstange 16 mit einem Führungsstift 20 versehen, der zu seiner Führung eine Bohrung des waagerechten Schenkels des Tragstüks 18 durchsetzt.The cylinder of the pressure medium-piston-cylinder unit 17 is connected to the horizontal leg of the angled support piece 18, which is welded to the base support 19 of the device. The support plate 15 is provided parallel to the piston rod 16 for its guidance with a guide pin 20 which passes through a bore of the horizontal leg of the support piece 18 for its guidance.

Die Stapelnadeln 4, 5 sind durch eine Heizpatrone beheizt, denen durch die Leitungen 22, 23 der Heizstrom zugeführt wird.The stacking needles 4, 5 are heated by a heating cartridge, to which the heating current is fed through the lines 22, 23.

Durch Betätigung der Druckmittel-Kolben-Zylindereinheit 17 läßt sich die Tragplatte 15 so weit absenken, daß die Spitzen der Stapelnadeln 4, 5 unterhalb der Förderebene der Förderbänder 10 liegen.By actuating the pressure-piston-cylinder unit 17, the support plate 15 can be lowered so far that the tips of the stacking needles 4, 5 lie below the conveying plane of the conveyor belts 10.

Wie aus Fig. 2 ersichtlich ist, sind die Obertrume der Förderbänder 10, 10′ auf Kastenprofilträgern 25, 25′ mit glattern oder polierten Oberseiten abgestützt. Mit den inneren Randbereichen der Förderriemen 10, 10′ sind die waagerechten Schenkel 26, 26′ von abgewinkelten Blechen vernietet oder in sonstiger Weise verbunden. Die vertikalen Schenkel 27, 27′ der Haltebleche können an den einander zugewandten inneren vertikalen Wänden der Kastenprofile 25, 25′ zu ihrer Abstützung anliegen und sind mit waagerechten Lagerzapfen 28, 28′ versehen, auf denen die Oberbacken der Zangen bildende doppelt abgewinkelte Zangenbügel 29, 29′ schwenkbar gelagert sind. Die Zangenbügel 29, 29′ sind als doppelarmige Winkelhebel ausgebildet, wobei der kürzere Arm 31 den Betätigungshebel bildet, der eine endseitige Nockenrolle 32 trägt.As can be seen from Fig. 2, the upper strands of the conveyor belts 10, 10 'are supported on box section supports 25, 25' with smooth or polished tops. With the inner edge regions of the conveyor belt 10, 10 ', the horizontal legs 26, 26' are riveted by angled sheets or connected in some other way. The vertical legs 27, 27 'of the holding plates can rest against the mutually facing inner vertical walls of the box sections 25, 25' for their support and are provided with horizontal bearing journals 28, 28 'on which the upper jaws of the pliers are formed by double-angled pliers clips 29, 29 'are pivotally mounted. The pliers brackets 29, 29 'are designed as double-armed angle levers, the shorter arm 31 forming the actuating lever which carries an end cam roller 32.

Die Zangenbügel 29, 29′ und die vertikalen Schenkel 27, 27′ der Haltebleche sind mit Haltestiften 34, 35 versehen, an denen die Enden von vorgespannten Zugfedern 36 befestigt sind. Die Haltestifte 34, 35 sind derart angeordnet, daß die Wirkungslinien der Zugfedern 36 beim Umschwenken der Klemmbügel 29, 29′ aus ihrer Klemmstellung in die Öffnungsstellung die Schwenkachse 28 schneiden.The pliers 29, 29 'and the vertical legs 27, 27' of the holding plates are provided with holding pins 34, 35, to which the ends of prestressed tension springs 36 are attached. The holding pins 34, 35 are arranged such that the lines of action of the tension springs 36 when pivoting the clamp bracket 29, 29 'cut the pivot axis 28 from its clamping position into the open position.

In Fig. 1 befinden sich die ersten drei Klemmbügel in ihrer Klemmstellung, während der rechte Klemmbügel in seine Öffnungsstellung geschwenkt ist. Da die Zugfedern 36 beim Umschalten der Klemmbügel von der Klemmstellung in die Öffnungsstellung die Schwenkachse 28 durchsetzen, sind die Klemmbügel beidseits der Totpunktstellung entweder in Richtung auf ihre Klemmstellung oder in Richtung auf ihre Öffnungsstellung durch die Zugfedern 36 belastet.In Fig. 1, the first three clamps are in their clamped position, while the right clamp is pivoted into its open position. Since the tension springs 36 pass through the pivot axis 28 when the clamping bracket is switched from the clamping position into the open position, the clamping brackets are on both sides of the Dead center position is loaded either in the direction of its clamping position or in the direction of its open position by the tension springs 36.

Zur Betätigung der Klemmbügel 29, 29′ der Klemmzangen sind in der Stapelstation S und im Bereich des Endes des Stapelförderers 10, 10′ Schaltplatten 40, 41 vorgesehen, die in der Stapelstation S nach dem Bilden eines Doppelbeutelstapels 42 die Klemmbügel aus ihrer Öffnungsstellung in ihre Schließstellung umschalten, so daß sie den jeweiligen Beutelstapel auf den Förderbändern 10, 10′ festklemmen. Das Abfördern eines Stapels aus der Stapelstation S kann erfolgen, wenn die Stapelnadeln 4, 5 abgesenkt worden sind und anschließend der Stapelförderer um einen Schritt intermittierend fortgeschaltet wird. In der Endstation E drückt die Schaltplatte 41 die Nockenrolle 32 herunter, so daß die Zangenbügel 29, 29′ in ihre Öffnungsstellung umgeschaltet werden. Zur Betätigung der Schaltplatten 40, 41 sind gestellfeste Druckmittel-Kolben-Zylindereinheiten 45, 46 vorgesehen.To actuate the clamping bracket 29, 29 'of the clamping tongs are in the stacking station S and in the area of the end of the stacking conveyor 10, 10' circuit boards 40, 41 are provided, which in the stacking station S after the formation of a double bag stack 42, the clamping bracket from their open position in their Switch the closed position so that they clamp the respective stack of bags on the conveyor belts 10, 10 '. A stack can be removed from the stacking station S when the stacking needles 4, 5 have been lowered and the stacking conveyor is then intermittently advanced by one step. In the end station E, the circuit board 41 presses the cam roller 32 down, so that the clamp arms 29, 29 'are switched to their open position. Pressure medium-piston-cylinder units 45, 46 which are fixed to the frame are provided for actuating the switching plates 40, 41.

In der Trennstation T sind oberhalb des zwishcen den Kastenträgern 25, 25′ gebildeten Spalts an einem gestellfesten Träger zwei Druckmittel-Kolben-Zylindereinheiten 50, 51 befestigt, deren Kolbenstangen ein beheiztes Trennmesser 53 tragen, daß in der Längsmittelebene zwichen den Trägern 25, 25′ heb- und absenkbar ist. Zwischen den Trägern 25, 25′ ist ein sich über die Länge der Stapel 42 erstreckendes Widerlager gestellfest angeordnet, dessen Oberfläche mit der Förderebene fluchtet. Die Breite des nicht dargestellten Widerlagers ist so bemessen, daß dieses von den Zangenbügeln und deren Betätigungsrollen passiert werden kann.In the separation station T, two pressure medium-piston-cylinder units 50, 51 are attached above the gap formed between the box girders 25, 25 'to a frame-fixed carrier, the piston rods of which bear a heated separating knife 53, that in the longitudinal median plane between the carriers 25, 25' can be raised and lowered. Between the supports 25, 25 ', an abutment extending over the length of the stack 42 is arranged fixed to the frame, the surface of which is aligned with the conveying plane. The width of the abutment, not shown, is dimensioned so that it can be passed by the clamps and their actuating rollers.

Claims (9)

1. Apparatus for the stacking of flat objects, preferably double bags welded off from a synthetic hose web or half hose web with opening edges lying in the zone of their median line,
which are deposited by a delivery station, preferably a so-called wicket with transport arms (3) arranged in a star configuration and in pairs rotating round a horizontal pin (2) in a stacking station (S), on a stack conveyor consisting of intermittently driven endless traction means (10, 10′) running over guide wheels or rollers (7, 9),
with a holding plate (15) arranged in the stacking station (S) carrying upwardly projecting stacking pins or needles (4, 5), whereon the objects are threaded on in the zone of their median line
to form stacks (42) which are carried away by the further actuation of the traction means (10, 10′),
with a separating station (T) down the line with a preferably heated cutter (53) that can be moved up and down and which separates the stacks (42) along a median line lying in the conveyance direction,
with spring-loaded clamping means (29, 29) clamping the stacks (42) after their formation onto the stack conveyor at their front edge zones viewed in the conveyance direction, and
with actuating devices fixed to the frame for the release and closure of the clamping means,
characterized in that
the stack conveyor merely consists of two interspaced endless conveyance means (10, 10′) circulating parallel to each other, which only serve to convey and hold the stacks (42),
in that the holding plate (15) is arranged to be raised and lowered in the stacking station (S) between the two endless conveyance means (10, 10′) of the stack conveyor in guideways (18, 20) fixed to the frame in such a way that the stacking pins or needles (4, 5) can be lowered down below the conveyance plane,
in that the separating cutter (53) in the separating station (T) cooperates with a bearing surface arranged to be fixed to the frame and disposed between the endless conveyance means (10, 10′) in the zone of the conveyance frame and
in that the clamping means consist respectively of two holding grippers (26, 29; 26′, 29′) whereof one each is fixed to each of the two endless conveyance means (10, 10′).
2. Apparatus according to claim 1, characterized in that the upper jaws (29, 29′) of thy holding grippers are mounted on vertical sides (27, 27′) of holding plates bent at right angles or angular sections for pivoting round horizontal transverse pins, and in that the other arms (26, 26′) of the holding plates or the like are fixed to the endless conveyance means (10, 10′) and form the counterjaws of the holding grippers.
3. Apparatus according to claim 2, characterized in that the ends of pretensioned tension springs (36) are respectively fixed to fastening devices (34, 35) of the upper jaws (29, 29′) and of the vertical sides (27, 27′) in such a way that their respective line of action passes through the axis of pivoting of the upper jaws (29, 29′) as they are pivoted from their clamping position into the opening position and vice versa, so that the tension spring (36) holds the upper jaws (29, 29′) in their clamping or opening position on both sides of the dead centre position.
4. Apparatus according to one of claims 2 or 3, characterized in that the upper jaws (29, 29′) are provided with actuation cams (32) whereon there act actuation devices for the change-over of the upper jaws (29, 29′).
5. Apparatus according to claim 4, characterized in that the actuation devices consist of lifting flanks fixed to the frame.
6. Apparatus according to claim 5, characterized in that the actuation devices consist of switching plates or the like, provided with drives.
7. Apparatus according to one of claims 2 to 4, characterized in that the upper jaws (29, 29′) consist of pivoting brackets bent at two points.
8. Apparatus according to one of claims 2 to 4, characterized in that the upper jaws (29, 29′) consist of two-arm levers whereof one arm forms the clamping bracket and the other (31) carries the switching cam (32).
9. Apparatus according to one of claims 1 to 8, characterized in that the stacking needles (4, 5) are heated.
EP87103776A 1986-04-04 1987-03-16 Device for stacking flat objects, especially double bags made of a plastics film Expired - Lifetime EP0239857B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3611237 1986-04-04
DE19863611237 DE3611237A1 (en) 1986-04-04 1986-04-04 DEVICE FOR STACKING FLAT ITEMS, PREFERABLY DOUBLE BAGS OF PLASTIC FILM

Publications (3)

Publication Number Publication Date
EP0239857A2 EP0239857A2 (en) 1987-10-07
EP0239857A3 EP0239857A3 (en) 1988-10-19
EP0239857B1 true EP0239857B1 (en) 1991-10-16

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ID=6297875

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Application Number Title Priority Date Filing Date
EP87103776A Expired - Lifetime EP0239857B1 (en) 1986-04-04 1987-03-16 Device for stacking flat objects, especially double bags made of a plastics film

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US (1) US4796499A (en)
EP (1) EP0239857B1 (en)
JP (1) JPS62255129A (en)
CA (1) CA1283133C (en)
DE (1) DE3611237A1 (en)
DK (1) DK172787A (en)
ES (1) ES2026141T3 (en)

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Also Published As

Publication number Publication date
DK172787A (en) 1987-10-05
EP0239857A3 (en) 1988-10-19
JPS62255129A (en) 1987-11-06
DE3611237C2 (en) 1988-04-21
DK172787D0 (en) 1987-04-03
EP0239857A2 (en) 1987-10-07
ES2026141T3 (en) 1992-04-16
DE3611237A1 (en) 1987-10-08
CA1283133C (en) 1991-04-16
US4796499A (en) 1989-01-10

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