EP0031512B1 - Device for drawing a shrinkable wrapping over a stack of articles - Google Patents

Device for drawing a shrinkable wrapping over a stack of articles Download PDF

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Publication number
EP0031512B1
EP0031512B1 EP80107741A EP80107741A EP0031512B1 EP 0031512 B1 EP0031512 B1 EP 0031512B1 EP 80107741 A EP80107741 A EP 80107741A EP 80107741 A EP80107741 A EP 80107741A EP 0031512 B1 EP0031512 B1 EP 0031512B1
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EP
European Patent Office
Prior art keywords
lifting carriage
support arms
stack
articles
support
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
Application number
EP80107741A
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German (de)
French (fr)
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EP0031512A1 (en
Inventor
Rainer Wilhelm Hannen
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.)
MSK Verpackungs Systeme GmbH
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MSK Verpackungs Systeme GmbH
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Publication date
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Priority to AT80107741T priority Critical patent/ATE2945T1/en
Publication of EP0031512A1 publication Critical patent/EP0031512A1/en
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Publication of EP0031512B1 publication Critical patent/EP0031512B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B43/00—Forming, feeding, opening or setting-up containers or receptacles in association with packaging
    • B65B43/26—Opening or distending bags; Opening, erecting, or setting-up boxes, cartons, or carton blanks
    • B65B43/34—Opening or distending bags; Opening, erecting, or setting-up boxes, cartons, or carton blanks by internal pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/13—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the preformed tubular webs being supplied in a flattened state
    • B65B9/135—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the preformed tubular webs being supplied in a flattened state for palletised loads

Definitions

  • the invention relates to a device for covering a stack of goods with a shrink hood, wherein two driven support arms are provided with clamps for receiving the upper unfolded edge of the shrink hood, which are vertically movable and are pivoted up to a storage space for the stack of goods.
  • a generic device (DE-A-2 806 343) the free end of a tubular film web wound on a roll is gripped by a device which unfolds the front edge of the tubular film web and separates a section from the web, at the same time a weld seam to form a Shrink hood is placed.
  • the two support arms which are mounted independently of one another in separate guides, are then moved vertically upwards and pivoted, the shrink hood unfolding as a result of this movement.
  • the support arms move downward and pull the shrink hood over the stack of goods. After loosening the clamps, the support arms can return to their starting position.
  • the device known so far has proven itself. However, there is room for improvement.
  • the object of the invention is to simplify the construction of a device of the type described at the outset and to improve its function.
  • support arms are connected to a common support tube which is only pivotally supported on one side about a substantially horizontal axis on a lifting carriage which is movable in vertical guides.
  • the device according to the invention enables a space-saving design because the support tube for the support arms is only supported on one side and accordingly a lifting slide with associated guides only needs to be attached to one side of the device. Overall, this leads to a simpler, but also less expensive construction, with an additional advantage being seen in the fact that the device can be adapted to different size ratios without difficulty, i.e. that the device can at least partially be constructed as a kit.
  • the guides for the lifting slide consist of a guide tube, preferably of two parallel vertical tubes, in particular rectangular tubes, on which the lifting slide is supported with rollers or the like made of steel, plastic or the like. Rubber rollers are preferably used to support the lifting carriage on the guide tubes, because then less noise is generated when the device is working.
  • An expedient embodiment of the invention is characterized in that the lifting carriage has a continuous recess for the guide tubes, which are accordingly enclosed by the lifting carriage in a vertical projection.
  • the invention allows the support tube of the support arms or its pivot bearing to extend as far as between the guide tubes - and also beyond. In this way, a cheaper weight balance is possible.
  • the lifting carriage on the one hand and the support tube on the other hand are expediently driven independently of one another. This does not rule out that the two drives can be controlled in such a way that the lifting carriage and support tube are moved simultaneously.
  • the control in the individual case can be determined by simple tests, the main thing being that the shrink hood held by the support arms unfolds completely on the way up to the stack of packaged goods.
  • the support arms should be arranged on the support tube in an adjustable manner.
  • the mutual distance between the support arms with respect to a central position should be uniform and at the same time changeable.
  • a light sensor arranged in the region or below the swivel axis on the lifting carriage can also be provided for detecting the height of the stack of goods.
  • the movement of the lifting carriage in particular can be controlled so that after turning, the opening of the shrink hood is exactly congruent with the top edge of the stack of goods.
  • the device shown is used to cover stacks of goods 29 brought up on a roller conveyor 60 with shrink hoods 43.
  • the shrink hoods 43 are formed by sections of a tubular film web which is stored on a roll (not shown).
  • a device, also not shown, for pulling off, holding and separating or welding the shrink hoods is disclosed in DE-A-2 806 343.
  • the device shown can also work with ready-made shrink hoods.
  • the shrink hoods 43 are gripped along their upper unfolded edge with clamps 38, 39 by two support arms 27, 28 and are first guided upward along the line 61 indicated by dash-dotted lines in FIG. 2, then pivoted through 180 ° to the stack of goods 29 and finally over pulled the stack of goods 29.
  • the two support arms 27, 28 are arranged on a common support tube 62, one end of which is supported in a lifting carriage 63 which is supported, guided and guided in two vertical rectangular tubes 64, 65 and can be moved in the vertical direction.
  • the support arms 27, 28 are arranged adjustably on the support tube 62, in such a way that they are equipped with a device, not shown in detail, e.g. a spindle drive, a rack and pinion drive or the like can be adjusted uniformly and simultaneously with respect to a central position.
  • a device not shown in detail, e.g. a spindle drive, a rack and pinion drive or the like can be adjusted uniformly and simultaneously with respect to a central position.
  • the brackets 38, 39 are constructed and designed as disclosed in German document DE-A-2 843122.8.
  • the clamps can also be actuated electrically instead of pneumatically, so that only one compressed air line or operating current line and the necessary control lines have to be led to the lifting carriage 63, while the actuating members can be arranged on the lifting carriage itself.
  • the lifting carriage 63 has a box-like shape and a continuous inner recess 66 for the two rectangular tubes 64, 65 arranged at a distance from one another.
  • a plurality of rubber rollers 67 are supported, which are supported on the outer sides of the rectangular tubes 64, 65 and Guide the lifting carriage 63 in its vertical movement.
  • An electric motor 68 arranged at the lower end of the rectangular tubes 64, 65 serves as the drive for the lifting carriage 63, the drive energy of which is transmitted to the lifting carriage 63 during chain operation or the like (not shown).
  • the entire drive device for the lifting carriage 63 is arranged between the rectangular tubes 64, 65, the dimensions of the device can be reduced so that a forklift can place the pallets with the stacks of goods directly next to the lifting carriage on the side of the roller conveyor 60.
  • the lifting carriage should be moved with two chains and the drive sprockets should have locking pawls.
  • the swivel drive for the support arms 27, 28 or the support tube 62 is independent of the drive of the lifting carriage 63 and has an electric motor 69, which on the lifting carriage 63 on the side facing away from the support tube 62 in the vicinity of the pivot bearing 70 of the support tube 62 is connected.
  • the pivot bearing 70 of the support tube 62 extends through the recess 66 of the lifting carriage 63 in the embodiment shown in the drawing.
  • a control device 71 with a control panel is available, in which information from a light button 72 is also processed, which is arranged on the lifting slide in the region below the pivot axis of the support tube 62.
  • the light sensor 72 is aligned and switched so that it stops the movement of the lifting carriage 63 when the shrink hood 43 pivoted with its opening over the stack of goods 29 is arranged congruently with the upper edge of the stack of goods 29. This has advantages with regard to the air jam generated when the shrink hood 43 is pulled over.
  • a guide track consisting of tubes for guiding the shrink hood 43 in the swivel range is connected to the lifting slide 63. This guideway is intended to prevent the shrink hood from turning over when swiveling.
  • light barriers 73, 74 are provided to secure the work area swept by the support arms 27, 28, which switch off the drives as soon as a person enters the work area.
  • a contact plate 75 which switches off the drives under load is arranged in the work area.
  • the device shown can also be assembled from building blocks in the manner of a modular system because the support arms 27, 28 are connected to a common support tube 62 and this is only supported on one side.
  • the adjustability of the support arms and their clamps also enables simple and quick adaptation to different hood sizes.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Specific Conveyance Elements (AREA)
  • Basic Packing Technique (AREA)
  • De-Stacking Of Articles (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Stacking Of Articles And Auxiliary Devices (AREA)
  • Packaging Of Special Articles (AREA)

Abstract

Equipment for covering a stack of goods with a shrink-wrap having a vertically displaceable lift carriage; guide means for said carriage; means for displacing said carriage; a substantially horizontal support connected to said carriage, said support rotateable substantially 180 DEG around a vertically displaceable horizontal axis; means for rotating said horizontal support; and, shrink-wrap gripping and releasing means connected to said horizontal support and moveable therewith for placing said shrink-wrap around said goods is disclosed.

Description

Die Erfindung betrifft eine Vorrichtung zum Überziehen eines Gutstapels mit einer Schrumpfhaube, wobei zwei angetriebene Tragarme mit Klammern zur Aufnahme des oberen auseinandergefalteten Randes der Schrumpfhaube vorgesehen sind, die vertikal bewegbar und bis über eine Stellfläche für den Gutstapel schwenkbar gelagert sind.The invention relates to a device for covering a stack of goods with a shrink hood, wherein two driven support arms are provided with clamps for receiving the upper unfolded edge of the shrink hood, which are vertically movable and are pivoted up to a storage space for the stack of goods.

Bei einer gattungsgemässen Vorrichtung (DE-A-2 806 343) wird das freie Ende einer auf einem Wickel aufgewickelten Schlauchfolienbahn von einer Einrichtung erfasst, die den vorderen Rand der Schlauchfolienbahn auseinanderfaltet und einen Abschnitt von der Bahn abtrennt, wobei gleichzeitig eine Schweissnaht zur Bildung einer Schrumpfhaube gelegt wird. Die beiden Tragarme, die unabhängig voneinander in gesonderten Führungen gelagert sind, werden dann vertikal nach oben bewegt und geschwenkt, wobei sich als Folge dieser Bewegung die Schrumpfhaube entfaltet. Wenn die entfaltete Schrumpfhaube mit ihrer offenen Seite über dem Gutstapel angekommen ist, bewegen sich die Tragarme abwärts und ziehen die Schrumpfhaube über den Gutstapel. Nach dem Lösen der Klammern können die Tragarme wieder in ihre Ausgangsstellung zurückkehren. Die insoweit bekannte Vorrichtung hat sich an sich bewährt. Sie ist jedoch verbesserungsfähig.In a generic device (DE-A-2 806 343) the free end of a tubular film web wound on a roll is gripped by a device which unfolds the front edge of the tubular film web and separates a section from the web, at the same time a weld seam to form a Shrink hood is placed. The two support arms, which are mounted independently of one another in separate guides, are then moved vertically upwards and pivoted, the shrink hood unfolding as a result of this movement. When the unfolded shrink hood has arrived with its open side over the stack of goods, the support arms move downward and pull the shrink hood over the stack of goods. After loosening the clamps, the support arms can return to their starting position. The device known so far has proven itself. However, there is room for improvement.

Aufgabe der Erfindung ist es, eine Vorrichtung der eingangs beschriebenen Gattung konstruktiv zu vereinfachen und funktionell zu verbessern.The object of the invention is to simplify the construction of a device of the type described at the outset and to improve its function.

Diese Aufgabe wird dadurch gelöst, dass die Tragarme an ein gemeinsames Tragrohr angeschlossen sind, das lediglich einseitig um eine im wesentlichen horizontale Achse schwenkbar an einem Hubschlitten gelagert ist, der in vertikalen Führungen beweglich ist.This object is achieved in that the support arms are connected to a common support tube which is only pivotally supported on one side about a substantially horizontal axis on a lifting carriage which is movable in vertical guides.

Die erfindungsgemässe Vorrichtung ermöglicht eine raumsparende Bauweise, weil das Tragrohr für die Tragarme nur einseitig gelagert ist und dementsprechend nur auf einer Seite der Vorrichtung ein Hubschlitten mit zugeordneten Führungen angebracht zu werden braucht. Das führt insgesamt zu einer einfacheren, aber auch kostengünstigeren Konstruktion, wobei ein zusätzlicher Vorteil darin gesehen wird, dass die Anpassung der Vorrichtung an unterschiedliche Grössenverhältnisse ohne Schwierigkeiten möglich ist, d.h., dass die Vorrichtung wenigstens teilweise als Bausatz konstruiert werden kann.The device according to the invention enables a space-saving design because the support tube for the support arms is only supported on one side and accordingly a lifting slide with associated guides only needs to be attached to one side of the device. Overall, this leads to a simpler, but also less expensive construction, with an additional advantage being seen in the fact that the device can be adapted to different size ratios without difficulty, i.e. that the device can at least partially be constructed as a kit.

Im allgemeinen genügt es, wenn die Führungen für den Hubschlitten aus einem Führungsrohr, vorzugsweise aus zwei zueinander parallelen vertikalen Rohren, insbesondere rechteckigen Rohren bestehen, auf denen der Hubschlitten mit Rollen od. dgl. aus Stahl, Kunststoff od. dgl. abgestützt ist. Vorzugsweise werden Gummirollen zur Abstützung des Hubschlittens an den Führungsrohren verwendet, weil dann beim Arbeiten der Vorrichtung weniger Geräusche entstehen. Eine zweckmässige Ausführungsform der Erfindung ist dadurch gekennzeichnet, dass der Hubschlitten eine durchgehende Ausnehmung für die Führungsrohre aufweist, die dementsprechend in einer vertikalen Projektion vom Hubschlitten umschlossen werden.In general, it is sufficient if the guides for the lifting slide consist of a guide tube, preferably of two parallel vertical tubes, in particular rectangular tubes, on which the lifting slide is supported with rollers or the like made of steel, plastic or the like. Rubber rollers are preferably used to support the lifting carriage on the guide tubes, because then less noise is generated when the device is working. An expedient embodiment of the invention is characterized in that the lifting carriage has a continuous recess for the guide tubes, which are accordingly enclosed by the lifting carriage in a vertical projection.

Das schafft auch günstige Bedingungen für die Lagerung des Tragrohrs, so dass nach einem weiteren Vorschlag die Erfindung das Tragrohr der Tragarme bzw. sein Schwenklager sich bis zwischen die Führungsrohre - und gg. auch darüberhinaus - erstrecken kann. Auf diese Weise ist ein günstigerer Gewichtsausgleich möglich.This also creates favorable conditions for the mounting of the support tube, so that, according to a further proposal, the invention allows the support tube of the support arms or its pivot bearing to extend as far as between the guide tubes - and also beyond. In this way, a cheaper weight balance is possible.

Zweckmässig werden der Hubschlitten einerseits und das Tragrohr andererseits unabhängig voneinander angetrieben. Das schliesst nicht aus, dass die Steuerung der beiden Antriebe so erfolgen kann, dass Hubschlitten und Tragrohr gleichzeitig bewegt werden. Die Steuerung im Einzelfall kann durch einfache Versuche ermittelt werden, wobei es hauptsächlich darauf ankommt, dass die von den Tragarmen gehaltene Schrumpfhaube sich auf dem Weg bis über den Stückgutstapel vollständig entfaltet.The lifting carriage on the one hand and the support tube on the other hand are expediently driven independently of one another. This does not rule out that the two drives can be controlled in such a way that the lifting carriage and support tube are moved simultaneously. The control in the individual case can be determined by simple tests, the main thing being that the shrink hood held by the support arms unfolds completely on the way up to the stack of packaged goods.

Um die Anpassung der Vorrichtung an unterschiedliche Haubengrössen zu ermöglichen, sollten die Tragarme verstellbar auf dem Tragrohr angeordnet sein. Insbesondere sollte der gegenseitige Abstand der Tragarme bezüglich einer Mittenstellung gleichmässig und gleichzeitig veränderbar sein. In diesem Zusammenhang ist es natürlich auch erforderlich, den gegenseitigen Abstand der Klammern auf den Tragarmen bezüglich einer Mittenstellung gleichzeitig und gleichmässig einzustellen. Das kann mit Hilfe von z.B. Spindeltrieben, Zahnstangentrieben u. dgl. erfolgen.In order to enable the device to be adapted to different hood sizes, the support arms should be arranged on the support tube in an adjustable manner. In particular, the mutual distance between the support arms with respect to a central position should be uniform and at the same time changeable. In this context, it is of course also necessary to set the mutual spacing of the brackets on the support arms with respect to a central position simultaneously and evenly. This can be done with the help of e.g. Spindle drives, rack drives u. The like.

Zur Steuerung der Vorrichtung kann auch ein im Bereich oder unterhalb der Schwenkachse am Hubschlitten amgeordneter Lichttaster zum Erfassen der Höhe des Gutstapels vorgesehen sein. Mit Hilfe dieses Lichttasters kann insbesondere die Bewegung des Hubschlittens so gesteuert werden, dass die Schrumpfhaube nach dem Wenden mit ihrer Öffnung genau deckungsgleich mit der Oberkante des Gutstapels steht. Beim anschliessenden Absenken derTragarme wird dann die Luft in der Schrumpfhaube gestaut, wodurch Beschädigungen der Schrumpfhaube beim Überziehen vermieden werden und eine gleichmässig glatte Anlage der Schrumpfhaube an den Oberflächen des Gutstapels erreicht wird.To control the device, a light sensor arranged in the region or below the swivel axis on the lifting carriage can also be provided for detecting the height of the stack of goods. With the help of this light button, the movement of the lifting carriage in particular can be controlled so that after turning, the opening of the shrink hood is exactly congruent with the top edge of the stack of goods. When the support arms are subsequently lowered, the air is then jammed in the shrink hood, which prevents damage to the shrink hood when it is pulled over and ensures that the shrink hood is evenly and smoothly applied to the surfaces of the stack of goods.

Ferner können Lichtschranken vorgesehen werden, die den Arbeitsbereich der schwenkbaren Tragarme sichern. Zusätzlich kann im Arbeitsbereich der schwenkbaren Tragarme eine den Antriebe bei Belastung abschaltende Kontaktplatte angeordnet sein, so dass Verletzungen von Personen durch die sich bewegenden Tragarme weitgehend ausgeschlossen sind.Furthermore, light barriers can be provided which secure the working area of the pivotable support arms. In addition, a contact plate which switches off the drives under load can be arranged in the working area of the pivoting support arms, so that injuries to persons due to the moving support arms are largely excluded.

Im folgenden wird ein in der Zeichnung dargestelltes Ausführungsbeispiel der Erfindung erläutert; es zeigen:

  • Fig. 1 in schematischer Darstellung eine Draufsicht auf eine Vorrichtung zum Überziehen eines Gutstapels mit einer Schrumpfhaube,
  • Fig. 2 in schematischer Darstellung eine Seitenansicht des Gegenstandes nach Fig. 1.
In the following an embodiment of the invention shown in the drawing is explained; show it:
  • 1 is a schematic representation of a top view of a device for covering a stack of goods with a shrink hood,
  • FIG. 2 shows a schematic side view of the object according to FIG. 1.

Die dargestellte Vorrichtung dient zum Überziehen von auf einem Rollenförderer 60 herangeführten Gutstapeln 29 mit Schrumpfhauben 43. Die Schrumpfhauben 43 werden von Abschnitten einer Schlauchfolienbahn gebildet, die auf einem nicht dargestellten Wickel gespeichert ist. Eine ebenfalls nicht dargestellte Einrichtung zum Abziehen, Aufhalten und Trennen bzw. Schweissen der Schrumpfhauben ist in der DE-A-2 806 343 offenbart. Die dargestellte Vorrichtung kann aber auch mit fertigkonfektionierten Schrumpfhauben arbeiten.The device shown is used to cover stacks of goods 29 brought up on a roller conveyor 60 with shrink hoods 43. The shrink hoods 43 are formed by sections of a tubular film web which is stored on a roll (not shown). A device, also not shown, for pulling off, holding and separating or welding the shrink hoods is disclosed in DE-A-2 806 343. The device shown can also work with ready-made shrink hoods.

Die Schrumpfhauben 43 werden längs ihres oberen auseinandergefalteten Randes mit Klammern 38, 39 von zwei Tragarmen 27, 28 erfasst und längs der in Fig. 2 strichpunktiert angegebenen Linie 61 zunächst nach oben geführt, dann um 180° bis über den Gutstapel 29 geschwenkt und schliesslich über den Gutstapel 29 gezogen.The shrink hoods 43 are gripped along their upper unfolded edge with clamps 38, 39 by two support arms 27, 28 and are first guided upward along the line 61 indicated by dash-dotted lines in FIG. 2, then pivoted through 180 ° to the stack of goods 29 and finally over pulled the stack of goods 29.

Die beiden Tragarme 27, 28 sind auf einem gemeinsamen Tragrohr 62 angeordnet, dessen eines Ende in einem Hubschlitten 63 gelagert ist, der an zwei zueinander parallelen vertikalen Rechteckrohren 64, 65 abgestützt, geführt und in vertikaler Richtung bewegbar ist.The two support arms 27, 28 are arranged on a common support tube 62, one end of which is supported in a lifting carriage 63 which is supported, guided and guided in two vertical rectangular tubes 64, 65 and can be moved in the vertical direction.

Um eine Anpassung an unterschiedliche Haubengrössen zu ermöglichen, sind die Tragarme 27, 28 verstellbar auf dem Tragrohr 62 angeordnet, und zwar derart, dass diese mit einer im einzelnen nicht dargestellten Einrichtung, z.B. einem Spindeltrieb, einem Zahnstangentrieb od. dgl. bezüglich einer Mittenstellung gleichmässig und gleichzeitig verstellt werden können. Ähnliches gilt auch für die Anordnung der Klammern 38, 39 auf den Tragarmen 27 bzw. 28. Im übrigen sind die Klammern 38, 39 so konstruiert und gestaltet, wie das in der deutschen Schrift DE-A-2 843122.8 offenbart ist. Dabei können ggf. die Klammern statt pneumatisch auch elektrisch betätigt werden, so dass nur eine Druckluftleitung oder Betriebsstromleitung und die notwendigen Steuerleitungen zum Hubschlitten 63 geführt werden müssen, während die Betätigungsorgane auf dem Hubschlitten selbst angeordnet werden können.In order to enable adaptation to different hood sizes, the support arms 27, 28 are arranged adjustably on the support tube 62, in such a way that they are equipped with a device, not shown in detail, e.g. a spindle drive, a rack and pinion drive or the like can be adjusted uniformly and simultaneously with respect to a central position. The same applies to the arrangement of the brackets 38, 39 on the support arms 27 and 28, respectively. In addition, the brackets 38, 39 are constructed and designed as disclosed in German document DE-A-2 843122.8. If necessary, the clamps can also be actuated electrically instead of pneumatically, so that only one compressed air line or operating current line and the necessary control lines have to be led to the lifting carriage 63, while the actuating members can be arranged on the lifting carriage itself.

Der Hubschlitten 63 hat beim dargestellten Ausführungsbeispiel kastenförmige Gestalt und eine durchgehende innere Ausnehmung 66 für die beiden im Abstand voneinander angeordneten Rechteckrohre 64, 65. Innerhalb des Hubschlittens 63 sind mehrere Gummirollen 67 gelagert, die sich auf den Aussenseiten der Rechteckrohre 64, 65 abstützen und den Hubschlitten 63 bei seiner Vertikalbewegung führen. Als Antrieb für den Hubschlitten 63 dient ein am unteren Ende der Rechteckrohre 64, 65 angeordneter E-Motor 68, dessen Antriebsenergie beim nicht dargestellten Kettenbetrieb od. dgl. auf den Hubschlitten 63 übertragen wird.In the illustrated embodiment, the lifting carriage 63 has a box-like shape and a continuous inner recess 66 for the two rectangular tubes 64, 65 arranged at a distance from one another. Within the lifting carriage 63, a plurality of rubber rollers 67 are supported, which are supported on the outer sides of the rectangular tubes 64, 65 and Guide the lifting carriage 63 in its vertical movement. An electric motor 68 arranged at the lower end of the rectangular tubes 64, 65 serves as the drive for the lifting carriage 63, the drive energy of which is transmitted to the lifting carriage 63 during chain operation or the like (not shown).

Wenn die gesamte Antriebseinrichtung für den Hubschlitten 63 zwischen den Rechteckrohren 64, 65 angeordnet wird, können die Abmessungen der Vorrichtung verkleinert werden, so dass ein Gabelstapler die Paletten mit den Gutstapeln unmittelbar neben dem Hubschlitten seitlich auf dem Rollenförderer 60 aufsetzen kann. Aus Sicherheitsgründen sollte der Hubschlitten mit zwei Ketten bewegt werden und sollten die Antriebskettenräder Sicherungsklinken aufweisen.If the entire drive device for the lifting carriage 63 is arranged between the rectangular tubes 64, 65, the dimensions of the device can be reduced so that a forklift can place the pallets with the stacks of goods directly next to the lifting carriage on the side of the roller conveyor 60. For safety reasons, the lifting carriage should be moved with two chains and the drive sprockets should have locking pawls.

Der Schwenkantrieb für die Tragarme 27, 28 bzw. das Tragrohr 62 ist unabhängig von dem Antrieb des Hubschlittens 63 und weist einen E-Motor 69 auf, der an den Hubschlitten 63 auf der dem Tragrohr 62 abgewandten Seite in der Nähe des Schwenklagers 70 des Tragrohres 62 angeschlossen ist. Das Schwenklager 70 des Tragrohres 62 erstreckt sich bei dem in der Zeichnung dargestellten Ausführungsbeispiel durch die Ausnehmung 66 des Hubschlittens 63.The swivel drive for the support arms 27, 28 or the support tube 62 is independent of the drive of the lifting carriage 63 and has an electric motor 69, which on the lifting carriage 63 on the side facing away from the support tube 62 in the vicinity of the pivot bearing 70 of the support tube 62 is connected. The pivot bearing 70 of the support tube 62 extends through the recess 66 of the lifting carriage 63 in the embodiment shown in the drawing.

Zur Steuerung der Antriebe 68, 69 steht eine Steuereinrichtung 71 mit Schaltpult zur Verfügung, in der auch Informationen eines Lichttasters 72 verarbeitet werden, der am Hubschlitten im Bereich unterhalb der Schwenkachse des Tragrohres 62 angeordnet ist. Der Lichttaster 72 ist so ausgerichtet und geschaltet, dass er die Bewegung des Hubschlittens 63 stoppt, wenn die mit ihrer Öffnung über den Gutstapel 29 geschwenkte Schrumpfhaube 43 deckungsgleich mit der Oberkante des Gutstapels 29 angeordnet ist. Das hat Vorteile im Hinblick auf den beim Überziehen der Schrumpfhaube 43 erzeugten Luftstau.To control the drives 68, 69, a control device 71 with a control panel is available, in which information from a light button 72 is also processed, which is arranged on the lifting slide in the region below the pivot axis of the support tube 62. The light sensor 72 is aligned and switched so that it stops the movement of the lifting carriage 63 when the shrink hood 43 pivoted with its opening over the stack of goods 29 is arranged congruently with the upper edge of the stack of goods 29. This has advantages with regard to the air jam generated when the shrink hood 43 is pulled over.

Nicht dargestellt ist, dass an den Hubschlitten 63 eine aus Rohren bestehende Führungsbahn zur Führung der Schrumpfhaube 43 im Schwenkbereich angeschlossen ist. Diese Führungsbahn soll verhindern, dass die Schrumpfhaube beim Schwenken nach aussen umschlägt.It is not shown that a guide track consisting of tubes for guiding the shrink hood 43 in the swivel range is connected to the lifting slide 63. This guideway is intended to prevent the shrink hood from turning over when swiveling.

Ferner sind zur Absicherung des von den Tragarmen 27, 28 überstrichenen Arbeitsbereiches Lichtschranken 73, 74 vorgesehen, die die Antriebe abschalten, sobald sich eine Person in den Arbeitsbereich begibt. Zusätzlich ist im Arbeitsbereich eine die Antriebe bei Belastung abschaltende Kontaktplatte 75 angeordnet.Furthermore, light barriers 73, 74 are provided to secure the work area swept by the support arms 27, 28, which switch off the drives as soon as a person enters the work area. In addition, a contact plate 75 which switches off the drives under load is arranged in the work area.

Man erkennt, dass die dargestellte Vorrichtung auch aus Bausteinen nach Art eines Baukastensystems zusammengesetzt werden kann, weil die Tragarme 27, 28 an ein gemeinsames Tragrohr 62 angeschlossen sind und dieses nur einseitig gelagert ist. Die Verstellbarkeit der Tragarme und ihrer Klammern ermöglicht darüber hinaus eine einfache und schnelle Anpassung an unterschiedliche Haubengrössen.It can be seen that the device shown can also be assembled from building blocks in the manner of a modular system because the support arms 27, 28 are connected to a common support tube 62 and this is only supported on one side. The adjustability of the support arms and their clamps also enables simple and quick adaptation to different hood sizes.

Claims (12)

1. A device for drawing a shrinkable wrapping (43) over a stack of articles (29), two driven support arms (27, 28) with clips (38, 39) being provided to receive the upper unfolded edge of the shrinkable wrapping (43) which are mounted so as to be movable vertically and pivotable into a loading space for the stack of articles (29), characterized in that the support arms (27, 28) are connected to a common support tube (62) which is mounted pivotably about an essentially horizontal axis at only one end on a lifting carriage (63) which is movable in vertical guides (64,65).
2. A device according to Claim 1, characterized in that the vertical guides (64, 65) for the lifting carriage (63) comprise at least one guide tube and preferably consist, in particular, of rectangular tubes on which the lifting carriage (63) is supported by rollers (67).
3. A device according to Claim 2, characterized in that the lifting carriage (63) is supported on the guide tubes (64, 65) by rubber rollers (67).
4. A device according to any one of Claims 1 to 3, characterized in that the lifting carriage (63) has a continuous opening (66) for the guide tubes (64,65).
5. A device according to any one of Claims 1 to 4, characterized in that the support tube (62) of the support arms (27, 28) or its pivot bearing (70) extends between the guide tubes (64,65).
6. A device according to any one of Claims 1 to 5, characterized in that the lifting carriage (63) on the one hand and the support tube (62) on the other are driven independently of one another.
7. A device according to any one of Claims 1 to 6, characterized in that the support arms (27, 28) are disposed displaceably on the support tube (62).
8. A device according to any one of Claims 1 to 7, characterized in that the mutual distance of the support arms (27, 28) relative to a central point is simultaneously variable by adjustment.
9. A device according to any one of Claims 1 to 8, characterized in that a light sensor (72) to determine the height of the stack of articles (29) is provided on the lifting carriage (63) in the region of or beneath the pivot axis.
10. A device according to any one of Claims 1 to 9, characterized by light barriers (73, 74) protecting the operating area of the pivotable support arms (27,28).
11. A device according to any one of Claims 1 to 10, characterized in that a contact plate (75) which switches off the drives (68, 69) when loaded is disposed in the operating area of the pivotable support arms (27, 28).
12. A device according to any one of Claims 1 to 11, characterized in that the drive device (68) for the lifting carriage (63) is disposed between the rectangular tubes (64, 65) in the region of the centre of gravity of the lifting carriage (63).
EP80107741A 1979-12-19 1980-12-09 Device for drawing a shrinkable wrapping over a stack of articles Expired EP0031512B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80107741T ATE2945T1 (en) 1979-12-19 1980-12-09 DEVICE FOR COVERING A STACK OF GOODS WITH A SHRINK HOOD.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792951086 DE2951086A1 (en) 1979-12-19 1979-12-19 DEVICE FOR COVERING A STACK OF GOODS WITH A SHRINK HOOD
DE2951086 1979-12-19

Publications (2)

Publication Number Publication Date
EP0031512A1 EP0031512A1 (en) 1981-07-08
EP0031512B1 true EP0031512B1 (en) 1983-04-06

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP80107741A Expired EP0031512B1 (en) 1979-12-19 1980-12-09 Device for drawing a shrinkable wrapping over a stack of articles

Country Status (4)

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US (1) US4409774A (en)
EP (1) EP0031512B1 (en)
AT (1) ATE2945T1 (en)
DE (2) DE2951086A1 (en)

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Publication number Priority date Publication date Assignee Title
US7210278B2 (en) * 2005-09-08 2007-05-01 Tien Heng Machniery Co., Ltd. Detecting and protecting device of a shrink film machine
CN101830292B (en) * 2010-04-28 2011-09-07 哈尔滨博实自动化股份有限公司 Tubular membrane reeling, unreeling and stretching mechanism

Citations (1)

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DE2706955A1 (en) * 1977-02-18 1978-08-24 Keller Gmbh & Co Kg Wrapping unit for stacks of bricks - has shrink film stretching grips mounted movably on frame above wrapper

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DE7804406U1 (en) * 1978-10-19 Maschinen- U. Stahlbau Kleve Gmbh, 4192 Kalkar-Wissel Device for forming and covering a shrink film hood over a piece goods to be shrunk, with an unfolding device for unfolding and dividing the folded-up tubular film and with a covering device
US2916860A (en) * 1955-12-02 1959-12-15 Roy S Sanford & Company Carton sealing
US2939259A (en) * 1958-05-06 1960-06-07 Us Rubber Co Wrapping device
DE1195677B (en) * 1962-12-20 1965-06-24 Trepel K G Maschinenfabrik Device for turning over stacks of panels
US3707064A (en) * 1970-02-02 1972-12-26 Aubura Eng Inc Apparatus for shrink-wrapping
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DE2706955A1 (en) * 1977-02-18 1978-08-24 Keller Gmbh & Co Kg Wrapping unit for stacks of bricks - has shrink film stretching grips mounted movably on frame above wrapper

Also Published As

Publication number Publication date
DE2951086A1 (en) 1981-06-25
ATE2945T1 (en) 1983-04-15
US4409774A (en) 1983-10-18
DE3062646D1 (en) 1983-05-11
EP0031512A1 (en) 1981-07-08

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