EP0250647A1 - Apparatus for fitting a shrink foil hood over a stack and shrinking it on said stack - Google Patents

Apparatus for fitting a shrink foil hood over a stack and shrinking it on said stack Download PDF

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Publication number
EP0250647A1
EP0250647A1 EP86117386A EP86117386A EP0250647A1 EP 0250647 A1 EP0250647 A1 EP 0250647A1 EP 86117386 A EP86117386 A EP 86117386A EP 86117386 A EP86117386 A EP 86117386A EP 0250647 A1 EP0250647 A1 EP 0250647A1
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EP
European Patent Office
Prior art keywords
stack
shrinking
gripping elements
frame
devices
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.)
Granted
Application number
EP86117386A
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German (de)
French (fr)
Other versions
EP0250647B2 (en
EP0250647B1 (en
Inventor
Richard Birkenfeld
Olaf Dr. Dipl.-Ing. Klüpfel
Manfred Dipl.-Ing. Grünert
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Maschinenfabrik Moellers GmbH
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Maschinenfabrik Moellers GmbH
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Application filed by Maschinenfabrik Moellers GmbH filed Critical Maschinenfabrik Moellers GmbH
Priority to AT86117386T priority Critical patent/ATE46886T1/en
Publication of EP0250647A1 publication Critical patent/EP0250647A1/en
Application granted granted Critical
Publication of EP0250647B1 publication Critical patent/EP0250647B1/en
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Classifications

    • 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
    • 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
    • B65B53/00—Shrinking wrappers, containers, or container covers during or after packaging
    • B65B53/02—Shrinking wrappers, containers, or container covers during or after packaging by heat
    • B65B53/06—Shrinking wrappers, containers, or container covers during or after packaging by heat supplied by gases, e.g. hot-air jets
    • B65B53/063—Tunnels

Definitions

  • the invention relates to a device for covering and shrinking a shrink film hood over or to a stack formed from a number of packaging objects with a height-movable frame, on which shrinking devices are arranged in the upper region and gripping elements in the lower region for gripping and pulling down the lower edge of the shrink film hood .
  • Known devices of this type have the advantage over separate devices for covering a shrink film hood and a redesigned shrinking device that work can be carried out more quickly because the transfer times from the hood pulling device to the shrinking device are eliminated, as is the time for retracting the gripping elements to pull the hood over in the separate hood pulling device and when using a lifting and lowering shrink frame, the time for its return movement after the shrinking process has ended.
  • the shrink film hood can be pulled over when the height-adjustable frame is lowered and the shrinking can take place when the latter is raised or retracted.
  • the object of the invention is to provide a solution by means of which the functions of the two known devices described above are combined in a single device without having to increase the overall height of the combination device.
  • this object is achieved in that a lifting device is arranged in the middle below the stack, by means of which the stack is transported by a conveyor into and out of the device for shrinking the lower edge of the shrink film hood into the area of the Can be raised and lowered again after shrinking, as in principle in association with a Shrink hood pulling station for turning over the lower edge of the shrink film hood is known from EP 0 077 508, and that furthermore a vertical relative mobility is formed between the gripping elements and the shrinking devices on the vertically movable frame.
  • the shrinking devices and the gripping elements between the stack and the devices located above them take up relatively little space and that in the lower position of the vertically movable frame the gripping elements for covering the lower edge of the shrink film hood can be moved further down from the effective range of the shrinking devices or have been moved before the downward movement of the height-adjustable frame, so that the gripping elements can detach from the shrink film hood after being pulled over and secondly when the shrink film hood is pulled over Commissioning of the shrinking devices for effecting a good shrinking after prior lifting of the stack by means of the lifting device provided according to the invention are not in the way, the same space for lifting the stack is available, which in the lowered position of the stack for securely grasping the lower edge of the shrink film hood by means of the height-adjustable frame arranged gripping elements is needed.
  • the gripping elements can be raised and lowered within limits by means of at least one pneumatic or hydraulic drive cylinder along corresponding vertical guides on the common frame.
  • the heat shield has two sliding plates which move from the laterally inactive position to the abutting shielding position are zontally displaceable. As can be seen, this means that practically no additional height is required.
  • a stack of goods 3 is arranged within a frame 1 on a carriageway 2.
  • a roller 4 is mounted in the frame, on which a plastic tube made of heat-shrinkable material is wound with gussets.
  • the flat-lying hose 5 is over deflection rollers 6 and drive rollers 7 fed to a pre-spreading device, which consists of guide elements 8 arranged vertically movable in the area of the folded hose edges, below which a separating device 9 and a welding device 10 are arranged.
  • a pre-spreading device which consists of guide elements 8 arranged vertically movable in the area of the folded hose edges, below which a separating device 9 and a welding device 10 are arranged.
  • two roof conveyor-type double conveyor belts 11 are arranged on both sides of the frame 1, the upper receiving ends being located directly below the guide elements 8 in their lowered position.
  • the double conveyor belts 11 are arranged so as to be pivotable about upper reversing wheel axes 19 of the lower conveyor belts, in such a way that the distance between their discharge ends can be changed to adapt to different cross-sectional dimensions of the stack of goods 3.
  • Each double conveyor belt 11 is assigned a pivot lever 12 which is arranged approximately parallel to the assigned double conveyor belt and can be pivoted about a lower fixed point 13 by means of an actuating device 14.
  • endless chains 15 are mounted, to which a frame 16 which is vertically movable by means of the chains 15 is fastened and in each of its four corner regions has a vertical guide 17, along each of which a gripping element 18 by means of a drive cylinder 20 is vertically movable between two stops 21.
  • a circumferential rectangular shrinking burner 22 Arranged above the vertical guides 17 on the frame 16 is a circumferential rectangular shrinking burner 22 which can direct hot gases in the direction of the stack 3 of goods in a manner not shown in any more detail.
  • a heat shield 23 is arranged below the double conveyor belts 11, which essentially consists of two sliding plates 24, which can be moved horizontally from the laterally inactive position according to FIG. 1 to the closed position according to FIG. 2.
  • a lifting device 25 is arranged between the track 2 formed by chain conveyors, by means of which the stack of goods 3 can be moved from the position resting on the track 2 according to FIG. 1 to the raised position according to FIG. 2.
  • the operation of the device is as follows: the hose 5 is opened via the guide elements 8 and the double conveyor belts 11 and after the lower end of the hose has run out of the double conveyor belts 1 a little, the gripping elements 18 which are pivoted inwards are inserted into the hose and moved outwards so that the hose is stretched tight between the gripping elements 18 located at the four corners of the stack of goods, as shown in FIG. 1. Then the double conveyor belts 11 and the transport chains 15 are actuated and the hose is removed a little from the stack 3 pulled up. Then the guide elements 8 are moved upwards and the welding and separating devices 9 and 10 are actuated.
  • the double conveyor belts 11 are put into operation again and at the same time the pivoting levers 12 are pivoted downward, as a result of which the folded tube edges are pressed or pulled out of the receiving ends of the double conveyor belts.
  • the frame 16 with the gripping elements 17 and the shrinking frame 22 is moved further downward until the stack of goods is completely covered by the hose hood now formed.
  • the stack of goods 3 is raised by means of the lifting device 25 and the gripping fingers 18 are moved downwards along the vertical guides 17, as shown in FIG. 2, in such a way that the gripping elements 18 are pulled out of the hose , wherein the lower edge 26 of the hose hood hangs a little over the lower end of the stack 3.
  • the two sliding plates 24 of the heat shield 23 are moved together, as shown in FIG. 2, so that when the shrinking torch is subsequently actuated, rising heat does not overlap the section of the hose 5 before being pulled over the stack can unfavorably soften.
  • the shrinking torch 22 is switched on, which in the position according to FIG. 2 is directed so that the lower edge 26 of the hose is blown against the underside of the stack and at the same time shrunk onto it, as shown in a dotted manner in FIG. 2.
  • the lifting device 25 is then actuated to lower the stack 3, so that the folded-over lower edge 26 is fixed between the stack and the carriageway 2.
  • the frame 16 is moved upwards again, so that the shrinking torch 22 shrinks the side surfaces of the hose 5 onto the stack.
  • the drive cylinder 20 is actuated to move the gripping elements 18 upward, so that the frame is again in the starting position for a new work cycle, as shown in FIG. 1.
  • the gripping devices arranged above the vertically movable frame for opening and holding the hose open during the pulling-over movement of the hose could also be designed differently or be omitted entirely if one can accept the appropriate stacks of material that the hose then pulls over the stack above its upper one Edges grinds.
  • other shrinking devices such as infrared shrinking devices could also be arranged on the vertically movable frame instead of a shrinking burner and the like. More.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
  • Specific Conveyance Elements (AREA)
  • Coating Apparatus (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Stacking Of Articles And Auxiliary Devices (AREA)

Abstract

An arrangement for sliding and shrinking a hood of shrinking foil over and onto a stack formed by a number of packaging objects. The arrangement includes a vertically movable frame with shrinking devices provided in the upper region of the frame and gripping elements for grasping and pulling down the lower edge of the shrinking foil. A lifting device arranged centrically underneath the stack serves to raise the stack from a conveying device which transports the stack into and out of the arrangement according to the invention. The lifting device raises the stack so that the lower edge of the hood of shrinking foil can be shrunk onto the stack up to the region of the conveying device. Subsequently, the lifting device is lowered. The vertical distance between the gripping elements and the shrinking devices is adjustable.

Description

Die Erfindung betrifft eine Vorrichtung zum Überziehen und Anschrumpfen einer Schrumpffolienhaube über bzw. an einen aus einer Anzahl von Verpackungsgegenständen gebildeten Stapel mit einem höhenbeweglichen Rahmen, an dem im oberen Bereich Schrumpfeinrichtungen und im unteren Bereich Greif­elemente zum Erfassen und Abwärtsziehen des unteren Randes der Schrumpffolienhaube angeordnet sind.The invention relates to a device for covering and shrinking a shrink film hood over or to a stack formed from a number of packaging objects with a height-movable frame, on which shrinking devices are arranged in the upper region and gripping elements in the lower region for gripping and pulling down the lower edge of the shrink film hood .

Bekannte Vorrichtungen dieser Art (WO 82/03833) weisen ge­genüber gesonderten Vorrichtungen zum Überziehen einer Schrumpffolienhaube und einer nachgestalteten Schrumpfvor­richtung den Vorteil auf, daß schneller gearbeitet werden kann, weil die Überführungszeiten von der Haubenüberzieh­vorrichtung zur Schrumpfvorrichtung entfallen, ebenso wie die Zeit zum Zurückfahren der Greifelemente zum Überziehen der Haube in der gesonderten Haubenüberziehvorrichtung und bei Verwendung eines heb- und senkbaren Schrumpfrahmens die Zeit für dessen Rückfahrbewegung nach beendetem Schrumpfvorgang. Bei einer kombinierten Vorrichtung der be­treffenden Art kann nämlich das Überziehen der Schrumpf­folienhaube beim Absenken des höhenbeweglichen Rahmens und das Anschrumpfen beim Wiederanheben bzw. Zurückfahren des­selben erfolgen.Known devices of this type (WO 82/03833) have the advantage over separate devices for covering a shrink film hood and a redesigned shrinking device that work can be carried out more quickly because the transfer times from the hood pulling device to the shrinking device are eliminated, as is the time for retracting the gripping elements to pull the hood over in the separate hood pulling device and when using a lifting and lowering shrink frame, the time for its return movement after the shrinking process has ended. In the case of a combined device of the type in question, the shrink film hood can be pulled over when the height-adjustable frame is lowered and the shrinking can take place when the latter is raised or retracted.

Bekannt sind ferner Vorrichtungen (EP 0 077 508), mittels welcher ein besonders guter Unterschrumpf der über den Sta­pel gezogenen Schrumpffolienhaube dadurch erreicht wird, daß der Stapel beim Überziehen der Schrumpffolienhaube an­gehoben und nach dem Umschlagen bzw. Unterschrumpfen des unteren Randes der Schrumpfhaube wieder abgesetzt wird, derart, daß dann der umgeschlagene bzw. untergeschrumpfte Rand der Schrumpfhaube während des weiteren Schrumpfens der Seitenflächen der überzogenen Schrumpfhaube festgehal­ten wird, d.h. beim Verkürzen der Schrumpffolien während des Schrumpfens der Seitenflächen nicht wieder von der Un­terseite des Stapels zurückgezogen werden kann.Devices are also known (EP 0 077 508), by means of which particularly good shrinking of the shrink film hood pulled over the stack is achieved in that the stack is lifted when the shrink film hood is pulled over and is set down again after the lower edge of the shrink hood has been folded over or shrunk down , in such a way that the folded or shrunk edge of the shrink hood is then held in place during the further shrinking of the side surfaces of the covered shrink hood, ie when shrinking the shrink film while shrinking the side surfaces can not be pulled back from the bottom of the stack.

Aufgabe der Erfindung ist die Schaffung einer Lösung, mit­tels welcher die Funktionen beider vorbeschriebenen bekann­ten Vorrichtungen in einer einzigen Vorrichtung kombiniert sind, ohne dabei die Bauhöhe der Kombinationsvorrichtung vergrößern zu müssen.The object of the invention is to provide a solution by means of which the functions of the two known devices described above are combined in a single device without having to increase the overall height of the combination device.

Bei einer Vorrichtung der eingangs bezeichneten Art wird diese Aufgabe dadurch gelöst, daß mittig unterhalb des Sta­pels eine Hubeinrichtung angeordnet ist, mittels welcher der Stapel von einem diesen in die und aus der Vorrichtung transportierenden Förderer zum Unterschrumpfen des unteren Randes der Schrumpffolienhaube bis in den Bereich des För­derers anhebbar und nach dem Unterschrumpfen wieder absenk­bar ist, wie dies im Prinzip in Zuordnung zu einer Schrumpfhaubenüberziehstation zum Umschlagen des unteren Randes der Schrumpffolienhaube aus EP 0 077 508 bekannt ist, und daß ferner zwischen den Greifelementen und den Schrumpfeinrichtungen an dem höhenbeweglichen Rahmen eine vertikale Relativbeweglichkeit ausgebildet ist.In a device of the type described above, this object is achieved in that a lifting device is arranged in the middle below the stack, by means of which the stack is transported by a conveyor into and out of the device for shrinking the lower edge of the shrink film hood into the area of the Can be raised and lowered again after shrinking, as in principle in association with a Shrink hood pulling station for turning over the lower edge of the shrink film hood is known from EP 0 077 508, and that furthermore a vertical relative mobility is formed between the gripping elements and the shrinking devices on the vertically movable frame.

Aufgrund dieser Ausgestaltung wird erreicht, daß in ober­ster Stellung des höhenbeweglichen Rahmens die Schrumpfein­richtungen und die Greifelemente zwischen dem Stapel und darüber befindlichen Einrichtungen, wie Greifereinrichtun­gen zum Öffnen und Offenhalten des Schrumpfschlauches wäh­rend des Überziehvorganges relativ wenig Raum beanspruchen und daß in unten befindlicher Stellung des höhenbewegli­chen Rahmens die Greifelemente zum Überziehen des unteren Randes der Schrumpffolienhaube aus dem Wirkungsbereich der Schrumpfeinrichtungen weiter abwärts bewegt werden können oder schon vor der Abwärtsbewegung des höhenbeweglichen Rahmens bewegt worden sind, so daß einerseits die Greifele­mente sich nach dem Überziehen der Schrumpffolienhaube von dieser lösen können und zum anderen beim Inbetriebsetzen der Schrumpfeinrichtungen zur Bewirkung eines guten Unter­schrumpfs nach vorangegangenem Anheben des Stapels mittels der erfindungsgemäß vorgesehenen Hubeinrichtung nicht im Wege stehen, wobei der gleiche Raum zum Anheben des Sta­pels zur Verfügung steht, der in abgesenkter Stellung des Stapels für das sichere Erfassen des unteren Randes der Schrumpffolienhaube mittels der am höhenbeweglichen Rahmen angeordneten Greifelemente benötigt wird.Because of this configuration it is achieved that in the uppermost position of the vertically movable frame, the shrinking devices and the gripping elements between the stack and the devices located above them, such as gripper devices for opening and keeping open the shrink tube during the pulling-up process, take up relatively little space and that in the lower position of the vertically movable frame the gripping elements for covering the lower edge of the shrink film hood can be moved further down from the effective range of the shrinking devices or have been moved before the downward movement of the height-adjustable frame, so that the gripping elements can detach from the shrink film hood after being pulled over and secondly when the shrink film hood is pulled over Commissioning of the shrinking devices for effecting a good shrinking after prior lifting of the stack by means of the lifting device provided according to the invention are not in the way, the same space for lifting the stack is available, which in the lowered position of the stack for securely grasping the lower edge of the shrink film hood by means of the height-adjustable frame arranged gripping elements is needed.

Eine besonders einfache Ausbildung ergibt sich dabei, wenn die Greifelemente gegenüber dem höhenbeweglichen Rahmen vertikal beweglich ausgebildet sind.A particularly simple design results if the gripping elements are designed to be vertically movable relative to the height-movable frame.

Zweckmäßig kann man dabei die Greifelemente mittels minde­stens eines pneumatischen oder hydraulischen Antriebszylin­ders längs entsprechender vertikaler Führungen an dem ge­meinsamen Rahmen in Grenzen heb- und senkbar ausgestalten.Expediently, the gripping elements can be raised and lowered within limits by means of at least one pneumatic or hydraulic drive cylinder along corresponding vertical guides on the common frame.

Um bei der erfindungsgemäß ermöglichten relativ niedrigen Bauhöhe der Gesamtvorrichtung zu verhindern, daß die beim Betätigen der Schrumpfeinrichtungen aufsteigende Wärme die oberhalb des Stapels befindliche Schrumpffolie für den nächsten Überziehvorgang vorzeitig erweicht, ist es in Wei­terbildung der Erfindung zweckmäßig, zwischen höhenstatio­nären oberen Greifeinrichtungen zum Öffnen und Offenhalten des Schlauches beim Überziehen über den Stapel und den in seiner obersten Stellung befindlichen höhenbeweglichen Rah­men einer Wärmeabschirmung anzuordnen, wie dies grundsätz­lich bei einfachen Schrumpfeinrichtungen mittels eines Kaltluftstromes schon bekannt ist (DE-GM 85 13 892).In order to prevent, with the relatively low overall height of the overall device made possible according to the invention, that the heat rising when the shrinking devices are actuated prematurely softens the shrink film located above the stack for the next covering process, it is expedient in a further development of the invention to open and hold open between upper stationary gripping devices to arrange the hose when pulling it over the stack and the height-adjustable frame of a heat shield in its uppermost position, as is already known in principle for simple shrinking devices by means of a cold air flow (DE-GM 85 13 892).

Besonders vorteilhaft ist es dabei, wenn die Wärmeabschir­mung zwei Schiebeplatten aufweist, die aus seitlich unwirk­samer Stellung in aneinanderstoßende Abschirmstellung hori­ zontal verschiebbar sind. Wie erkennbar ist, wird dadurch praktisch keine zusätzliche Bauhöhe benötigt.It is particularly advantageous if the heat shield has two sliding plates which move from the laterally inactive position to the abutting shielding position are zontally displaceable. As can be seen, this means that practically no additional height is required.

Die Erfindung ist nachstehend anhand der Zeichnung bei­spielsweise näher erläutert. Diese zeigt in:

  • Fig. 1 eine Vorrichtung gemäß der Erfindung in Seiten­ansicht mit in oberster Stellung befindlichem höhenbeweglichen Rahmen und abgesenktem Stapel so­wie Wärmeabschirmung in unwirksamer Stellung,
  • Fig. 2 eine Vorrichtung gemäß Fig. 1 mit in unterster Stellung befindlichem höhenbeweglichen Rahmen und in unterster Stellung befindlichen Greifelementen und mittels Hubeinrichtung angehobenem Stapel so­wie in Abschirmstellung befindlicher Wärmeabschir­mung und in
  • Fig. 3 ein vergrößertes Detaill A aus Fig. 1 mit Be­tätigungseinrichtung für die Greifelemente.
The invention is explained below with reference to the drawing, for example. This shows in:
  • 1 is a side view of a device according to the invention with the vertically movable frame in the uppermost position and the stack lowered, and heat shielding in the inactive position,
  • Fig. 2 shows a device according to FIG. 1 with the vertically movable frame in the lowest position and the gripping elements in the lowest position and the stack raised by means of the lifting device and in the shielding position of the heat shield and in
  • Fig. 3 shows an enlarged detail A from Fig. 1 with actuating device for the gripping elements.

Bei der in der Zeichnung wiedergegebenen Vorrichtung ist innerhalb eines Gestells 1 auf einer Fahrbahn 2 ein Gut­stapel 3 angeordnet. Im Gestell ist eine Rolle 4 gelagert, auf der ein Kunststoffschlauch aus wärmeschrumpffähigem Ma­terial mit Seitenfalten aufgewickelt ist. Der flachliegen­de Schlauch 5 wird über Umlenkrollen 6 und Antriebsrollen 7 einer Vorspreizeinrichtung zugeführt, die aus im Bereich der gefalteten Schlauchränder vertikal beweglich angeord­neten Leitelementen 8 besteht, unterhalb welcher eine Trenneinrichtung 9 sowie eine Schweißeinrichtung 10 ange­ordnet sind. Unterhalb der Leitelemente 8 sind auf beiden Seiten des Gestells 1 zei dachförmig angeordnete Doppel­förderbänder 11 angeordnet, wobie die oberen Aufnahmeenden unmittelbar unterhalb der Leitelemente 8 in deren abgesenk­ter Stellung befindlich sind. Die Doppelförderbänder 11 sind um obere Umkehrräderachsen 19 der unteren Förderbän­der schwenkbar angeordnet, derart, daß der Abstand ihrer Abgabeenden zur Anpassung an verschiedene Querschnittsab­messungen des Gutstapels 3 veränderbar ist. Jedem Doppel­förderband 11 ist ein Schwenkhebel 12 zugeordnet, der etwa parallel zu dem zugeordneten Doppelförderband angeordnet ist und um einen unteren Festpunkt 13 mittels einer Betäti­gungseinrichtung 14 schwenkbar ist.In the device shown in the drawing, a stack of goods 3 is arranged within a frame 1 on a carriageway 2. A roller 4 is mounted in the frame, on which a plastic tube made of heat-shrinkable material is wound with gussets. The flat-lying hose 5 is over deflection rollers 6 and drive rollers 7 fed to a pre-spreading device, which consists of guide elements 8 arranged vertically movable in the area of the folded hose edges, below which a separating device 9 and a welding device 10 are arranged. Below the guide elements 8, two roof conveyor-type double conveyor belts 11 are arranged on both sides of the frame 1, the upper receiving ends being located directly below the guide elements 8 in their lowered position. The double conveyor belts 11 are arranged so as to be pivotable about upper reversing wheel axes 19 of the lower conveyor belts, in such a way that the distance between their discharge ends can be changed to adapt to different cross-sectional dimensions of the stack of goods 3. Each double conveyor belt 11 is assigned a pivot lever 12 which is arranged approximately parallel to the assigned double conveyor belt and can be pivoted about a lower fixed point 13 by means of an actuating device 14.

Im Gestell 1 sind in der Nähe der vier Ecken desselben end­los umlaufende Ketten 15 gelagert, an denen ein mittels der Ketten 15 höhenbeweglicher Rahmen 16 befestigt ist, der in seinen vier Eckbereichen jeweils eine Vertikalfüh­rung 17 aufweist, längs welcher je ein Greifelement 18 mit­tels eines Antriebszylinder 20 zwischen zwei Anschlägen 21 vertikal beweglich ist.In the frame 1, in the vicinity of the four corners of the same, endless chains 15 are mounted, to which a frame 16 which is vertically movable by means of the chains 15 is fastened and in each of its four corner regions has a vertical guide 17, along each of which a gripping element 18 by means of a drive cylinder 20 is vertically movable between two stops 21.

Oberhalb der Vertikalführungen 17 ist am Rahmen 16 ein ringsum verlaufender rechteckiger Schrumpfbrenner 22 ange­ordnet, der in nicht näher dargestellter Weise Heißgase in Richtung auf den Gutstapel 3 richten kann.Arranged above the vertical guides 17 on the frame 16 is a circumferential rectangular shrinking burner 22 which can direct hot gases in the direction of the stack 3 of goods in a manner not shown in any more detail.

Unterhalb der Doppelförderbänder 11 ist eine Wärmeabschir­mung 23 angeordnet, welche im wesentliche aus zwei Schie­beplatten 24 besteht, welche aus seitlich unwirksamer Stel­lung gemäß Fig. 1 in geschlossene Stellung gemäß Fig. 2 horizontal verschoben werden können. Schließlich ist zwi­schen der von Kettenförderern gebildeten Fahrbahn 2 eine Hubeinrichtung 25 angeordnet, mittels welcher der Gutsta­pel 3 aus der auf der Fahrbahen 2 ruhenden Stellung gemäß Fig. 1 in angehobene Stellung gemäß Fig. 2 verbracht wer­den kann.A heat shield 23 is arranged below the double conveyor belts 11, which essentially consists of two sliding plates 24, which can be moved horizontally from the laterally inactive position according to FIG. 1 to the closed position according to FIG. 2. Finally, a lifting device 25 is arranged between the track 2 formed by chain conveyors, by means of which the stack of goods 3 can be moved from the position resting on the track 2 according to FIG. 1 to the raised position according to FIG. 2.

Die Wirkungsweise der Vorrichtung ist wie folgt: Der Schlauch 5 wird über die Leitelemente 8 und die Doppelför­derbänder 11 geöffnet und nachdem das untere Ende des Schlauches ein Stück aus den Doppelförderbändern 1 heraus­gelaufen ist, werden die ein Stück einwärts verschwenkten Greifelemente 18 in den Schlauch eingefahren und nach au­ßen bewegt, so daß der Schlauch stramm zwischen den an den vier Ecken des Gutstapels befindlichen Greifelementen 18 aufgespannt ist, wie dies Fig. 1 zeigt. Darauf werden die Doppelförderbänder 11 und die Transportketten 15 betätigt und der Schlauch wird über den Gutstapel 3 ein Stück ab­ wärts gezogen. Dann werden die Leitelemente 8 nach oben gefahren und die Schweiß- und Trenneinrichtungen 9 und 10 werden betätigt. Anschließend werden die Doppelförderbän­der 11 wieder in Betrieb gesetzt und gleichzeitig die Schwenkhebel 12 abwarts geschwenkt, wodurch die gefalteten Schlauchränder aus den Aufnahmeenden der Doppelförderbän­der herausgedrückt bzw. -gezogen werden. Gleichzeitig wird auch der Rahmen 16 mit den Greifelementen 17 und dem Schrumpfrahmen 22 weiter abwärts bewegt, bis der Gutstapel vollständig von der jetzt gebildeten Schlauchhaube überzo­gen ist.The operation of the device is as follows: the hose 5 is opened via the guide elements 8 and the double conveyor belts 11 and after the lower end of the hose has run out of the double conveyor belts 1 a little, the gripping elements 18 which are pivoted inwards are inserted into the hose and moved outwards so that the hose is stretched tight between the gripping elements 18 located at the four corners of the stack of goods, as shown in FIG. 1. Then the double conveyor belts 11 and the transport chains 15 are actuated and the hose is removed a little from the stack 3 pulled up. Then the guide elements 8 are moved upwards and the welding and separating devices 9 and 10 are actuated. Subsequently, the double conveyor belts 11 are put into operation again and at the same time the pivoting levers 12 are pivoted downward, as a result of which the folded tube edges are pressed or pulled out of the receiving ends of the double conveyor belts. At the same time, the frame 16 with the gripping elements 17 and the shrinking frame 22 is moved further downward until the stack of goods is completely covered by the hose hood now formed.

Während des Abwärtsfahrens des Rahmens 16 oder auch schon vorher wird der Gutstapel 3 mittels der Hubeinrichtung 25 angehoben und werden die Greiffinger 18 längs der Vertikal­führungen 17 abwärts bewegt, so wie dies Fig. 2 zeigt, der­art, daß die Greifelemente 18 aus dem Schlauch herausgezo­gen werden, wobei der untere Rand 26 der Schlauchhaube ein Stück über das untere Ende des Gutstapels 3 herabhängt. Nach dem vollständigen Überziehen des Schlauches über den Stapel werden die beiden Schiebeplatten 24 der Wärmeab­schirmung 23 zusammengefahren, wie dies Fig. 2 zeigt, so daß bei der nachfolgenden Betätigung des Schrumpfbrenners aufsteigende Wärme den oberhalb befindlichen Abschnitt des Schlauches 5 vor dem Überziehen über den Stapel nicht in unvorteilhafter Weise erweichen kann.During the downward movement of the frame 16 or even beforehand, the stack of goods 3 is raised by means of the lifting device 25 and the gripping fingers 18 are moved downwards along the vertical guides 17, as shown in FIG. 2, in such a way that the gripping elements 18 are pulled out of the hose , wherein the lower edge 26 of the hose hood hangs a little over the lower end of the stack 3. After the hose has been completely pulled over the stack, the two sliding plates 24 of the heat shield 23 are moved together, as shown in FIG. 2, so that when the shrinking torch is subsequently actuated, rising heat does not overlap the section of the hose 5 before being pulled over the stack can unfavorably soften.

Daraufhin wird der Schrumpfbrenner 22 eingeschaltet, der in der Stellung gemäß Fig. 2 so gerichtet ist, daß der un­tere Rand 26 des Schlauches gegen die Unterseite des Sta­pels geblasen und gleichzeitig an diese angeschrumpft wird, wie dies punktiert in Fig. 2 dargestellt ist. Darauf­hin wird die Hubeinrichtung 25 zum Absenken des Stapels 3 betätigt, so daß der umgeschlagene untere Rand 26 zwischen Stapel und Fahrbahn 2 festgelegt ist. Gleichzeitig mit bzw. kurz nach dem Absenken des Gutstapels 3 wird der Rah­men 16 wieder aufwärtsbewegt, so daß der Schrumpfbrenner 22 die Seitenflächen des Schlauches 5 an den Stapel an­schrumpft. Am Ende der Aufwärtsbewegung des Rahmens 16 wird der Antriebszylinder 20 zum Aufwärtsbewegen der Greif­elemente 18 betätigt, so daß der Rahmen wieder in Ausgangs­position für einen neuen Arbeitszyklus ist, wie dies Fig. 1 zeigt. Je nach Art des Gutstapels 3 kann es auch empfeh­lenswert sei, nach dem Unterschrumpfen und Festlegen des unteren Randes 26 des Schlauches den Rahmen 16 zunächst ohne arbeitenden Schrumpfbrenner wieder nach oben zu fah­ren und dann erneut unter Inbetriebsetzen des Schrumpfbren­ners 22 abzusenken, derart, daß das Schrumpfen von oben nach unten fortschreitet, um derart innerhalb des Stapels befindliche Luft möglichst weitgehend entweichen zu lassen.Thereupon, the shrinking torch 22 is switched on, which in the position according to FIG. 2 is directed so that the lower edge 26 of the hose is blown against the underside of the stack and at the same time shrunk onto it, as shown in a dotted manner in FIG. 2. The lifting device 25 is then actuated to lower the stack 3, so that the folded-over lower edge 26 is fixed between the stack and the carriageway 2. Simultaneously with or shortly after the stack of goods 3 has been lowered, the frame 16 is moved upwards again, so that the shrinking torch 22 shrinks the side surfaces of the hose 5 onto the stack. At the end of the upward movement of the frame 16, the drive cylinder 20 is actuated to move the gripping elements 18 upward, so that the frame is again in the starting position for a new work cycle, as shown in FIG. 1. Depending on the type of material stack 3, it may also be advisable, after shrinking and fixing the lower edge 26 of the hose, to first move the frame 16 upwards without a working shrinking torch and then to lower it again while starting the shrinking torch 22 in such a way that the shrinking progresses from top to bottom in order to let air inside the stack as far as possible escape.

Natürlich sind zahlreiche Abänderungen der beschriebenen Vorrichtung möglich, ohne den Grundgedanken der Erfindung zu verlassen. So könnten die oberhalb des höhenbeweglichen Rahmens angeordneten Greifeinrichtungen zum Öffnen und Of­fenhalten des Schlauches während der Überziehbewegung des Schlauches auch anders gestaltet sein oder ganz entfallen, wenn man bei entsprechenden Gutstapeln in Kauf nehmen kann, daß dann der Schlauch beim Überziehen über den Sta­pel über dessen obere Kanten schleift. Auch könnten natür­lich anstelle eines Schrumpfbrenners andere Schrumpfein­richtungen wie Infrarotschrumpfeinrichtungen am höhenbeweg­lichen Rahmen angeordnet sein und dgl. mehr.Of course, numerous modifications of the described device are possible without the basic idea of the invention to leave. Thus, the gripping devices arranged above the vertically movable frame for opening and holding the hose open during the pulling-over movement of the hose could also be designed differently or be omitted entirely if one can accept the appropriate stacks of material that the hose then pulls over the stack above its upper one Edges grinds. Of course, other shrinking devices such as infrared shrinking devices could also be arranged on the vertically movable frame instead of a shrinking burner and the like. More.

Claims (5)

1. Vorrichtung zum Überziehen und Anschrumpfen einer Schrumpffolienhaube über bw. an einen aus einer Anzahl von Verpackungsgegenständen gebildeten Stapel mit einem höhenbeweglichen Rahmen, an dem im oberen Bereich Schrumpf­einrichtungen und im unteren Bereich Greitelemente zum Er­fassen und Abwärtsziehen des unteren Randes der Schrumpf­folienhaube angeordnet sind,
dadurch gekennzeichnet,
daß mittig unterhalb des Stapels (3) eine Hubeinrichtung (25) angeordnet ist, mittels welcher der Stapel von einem diesen in die und aus der Vorrichtung transportierenden Förderer (2) zum Unterschrumpfen des unteren Randes (26) der Schrumpffolienhaube (5) bis in den Bereich des Förde­rers anhebbar und nach dem Unterschrumpfen wieder absenk­bar ist und daß zwischen den Greifelementen (18) und den Schrumpfeinrichtungen (22) an dem höhenbeweglichen Rahmen (16) eine vertikale Relativbeweglichkeit ausgebildet ist.1. Device for covering and shrinking a shrink film hood over bw. on a stack formed from a number of packaging objects with a height-adjustable frame, on which shrinking devices are arranged in the upper area and gripping elements for gripping and pulling down the lower edge of the shrink film hood are arranged in the lower area,
characterized,
that a lifting device (25) is arranged in the middle below the stack (3), by means of which the stack is transported from a conveyor (2) transporting it into and out of the device for shrinking the lower edge (26) of the shrink film hood (5) into the Area of the conveyor can be raised and lowered again after shrinking and that a vertical relative mobility is formed between the gripping elements (18) and the shrinking devices (22) on the vertically movable frame (16). 2. Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß die Greifelemente (18) gegenüber dem höhenbeweglichen Rahmen (16) vertikal beweglich ausgebildet sind.2. Device according to claim 1,
characterized,
that the gripping elements (18) are vertically movable relative to the height-movable frame (16). 3. Vorrichtung nach Anspruch 2,
dadurch gekennzeichnet,
daß die Greifelemente (18) mittels mindestens eines pneuma­tischen oder hydraulischen Antriebszylinders (20) längs entsprechender vertikaler Führungen (17) an dem gemeinsa­men Rahmen (16) in Grenzen heb- und senkbar sind.3. Device according to claim 2,
characterized,
that the gripping elements (18) can be raised and lowered within limits by means of at least one pneumatic or hydraulic drive cylinder (20) along corresponding vertical guides (17) on the common frame (16). 4. Vorrichtung nach Anspruch 1 oder einem der folgenden,
dadurch gekennzeichnet,
daß zwischen höhenstationären oberen Greifeinrichtungen (18) zum Öffnen und Offenhalten des Schlauches (5) beim Überziehen über den Stapel (3) und dem in seiner obersten Stellung befindlichen höhenbeweglichen Rahmen (16) eine Wärmeabschirmung (23) angeordnet ist.4. The device according to claim 1 or one of the following,
characterized,
that a heat shield (23) is arranged between height-stationary upper gripping devices (18) for opening and keeping open the hose (5) when pulled over the stack (3) and the vertically movable frame (16) located in its uppermost position. 5. Vorrichtung nach Anspruch 4,
dadurch gekennzeichnet,
daß die Wärmeabschirmung (23) zwei Schiebeplatten (24) aufweist, die aus seitlich unwirksamer Stellung in aneinan­derstoßende Abschirmstellung horizontal verschiebbar sind.5. The device according to claim 4,
characterized,
that the heat shield (23) has two sliding plates (24) which are horizontally displaceable from the laterally inactive position in the abutting shielding position.
EP86117386A 1986-06-25 1986-12-13 Apparatus for fitting a shrink foil hood over a stack and shrinking it on said stack Expired - Lifetime EP0250647B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86117386T ATE46886T1 (en) 1986-06-25 1986-12-13 DEVICE FOR COVERING AND SHRINKING A SHRINK FILM HOOD OVER RESPECTIVELY. TO A STACK.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3621297 1986-06-25
DE19863621297 DE3621297A1 (en) 1986-06-25 1986-06-25 DEVICE FOR PULLING ON AND SHRINKING A SHRINK FILM HOOD OVER OR ON A STACK.

Publications (3)

Publication Number Publication Date
EP0250647A1 true EP0250647A1 (en) 1988-01-07
EP0250647B1 EP0250647B1 (en) 1989-10-04
EP0250647B2 EP0250647B2 (en) 1995-05-10

Family

ID=6303680

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86117386A Expired - Lifetime EP0250647B2 (en) 1986-06-25 1986-12-13 Apparatus for fitting a shrink foil hood over a stack and shrinking it on said stack

Country Status (7)

Country Link
US (1) US4724658A (en)
EP (1) EP0250647B2 (en)
JP (1) JPS6312433A (en)
AT (1) ATE46886T1 (en)
DE (2) DE3621297A1 (en)
ES (1) ES2011447T5 (en)
SU (1) SU1625328A3 (en)

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CN109896075A (en) * 2019-04-08 2019-06-18 湖州师范学院求真学院 A kind of automatic adhering device of marker post protective cloth of road and traffic sign plates
IT201900024781A1 (en) * 2019-12-19 2021-06-19 Officina Bocedi S R L Pallet coating machine

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DE202010001587U1 (en) * 2010-01-29 2010-04-22 Msk - Verpackungs-Systeme Gmbh Device for wrapping a stack of goods with a film
DE102016212436B4 (en) * 2016-07-07 2018-07-26 Signode Industrial Group Llc Packaging process and hood stretcher
DE102019216346A1 (en) * 2019-10-23 2021-04-29 Signode Industrial Group Llc Method and device for packaging a stack of goods in a tubular stretch film
CN110745306A (en) * 2019-11-22 2020-02-04 安徽永锋智能包装科技有限公司 Refrigerator packing bottom-closing equipment
CN110834771A (en) * 2019-11-22 2020-02-25 安徽永锋智能包装科技有限公司 Bottom-closing method for transparent packaging bag of refrigerator
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CN109896075A (en) * 2019-04-08 2019-06-18 湖州师范学院求真学院 A kind of automatic adhering device of marker post protective cloth of road and traffic sign plates
CN109896075B (en) * 2019-04-08 2020-12-04 湖州师范学院求真学院 Automatic adhesion equipment for sign post protection cloth of road traffic sign board
IT201900024781A1 (en) * 2019-12-19 2021-06-19 Officina Bocedi S R L Pallet coating machine
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Also Published As

Publication number Publication date
ATE46886T1 (en) 1989-10-15
EP0250647B2 (en) 1995-05-10
ES2011447T5 (en) 1995-08-16
SU1625328A3 (en) 1991-01-30
EP0250647B1 (en) 1989-10-04
DE3621297C2 (en) 1992-05-14
US4724658A (en) 1988-02-16
DE3666025D1 (en) 1989-11-09
JPS6312433A (en) 1988-01-19
ES2011447B3 (en) 1990-01-16
DE3621297A1 (en) 1988-01-14

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