EP0006249A1 - Device for pulling a tube of heat-shrinkable plastic over a stack of goods - Google Patents

Device for pulling a tube of heat-shrinkable plastic over a stack of goods Download PDF

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Publication number
EP0006249A1
EP0006249A1 EP79200046A EP79200046A EP0006249A1 EP 0006249 A1 EP0006249 A1 EP 0006249A1 EP 79200046 A EP79200046 A EP 79200046A EP 79200046 A EP79200046 A EP 79200046A EP 0006249 A1 EP0006249 A1 EP 0006249A1
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EP
European Patent Office
Prior art keywords
hose
tube
stack
gripping devices
rollers
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
EP79200046A
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German (de)
French (fr)
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EP0006249B1 (en
Inventor
Peter Dipl.-Ing. Aka
Rudolf Ing. Grad. Herbst
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Maschinenfabrik Moellers GmbH
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Maschinenfabrik Moellers GmbH
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Publication of EP0006249A1 publication Critical patent/EP0006249A1/en
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Publication of EP0006249B1 publication Critical patent/EP0006249B1/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
    • 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 hose made of heat-shrinkable plastic from above over a stack of goods, the hose being pulled laterally folded from a roll and a welding and separating device and a device for pre-spreading the side gusset edges and a device for fully spreading apart and contactless covering Hose is fed over the stack of goods, with gripping devices for the lower edge of the opened hose and other gripping devices, which together with the gripping devices acting on the lower edge of the opened hose during the last part of the pulling-over movement, the four upper corner points of the side parts of the meanwhile formed Holding the hose hood, can be moved downwards.
  • the further gripping devices also serve for the complete opening or spreading of the hose and, accordingly, are movable in the horizontal direction in addition to their vertical mobility.
  • the necessary control and drive effort is considerable and particularly complicated and therefore prone to failure, with the additional disadvantage that after each lowering movement of a hose hood, the previously disconnected hose end must be threaded into the relevant gripping devices designed as pairs of clamping rollers, which is due to the relatively large vertical distance caused by the welding and separating devices arranged between them, between these further gripping devices and the pre-spreading devices located above, is particularly problematic.
  • the object of the invention is therefore to create a Lö solution, which combines the advantages of the two known constructions described above without having to accept their disadvantages, that is to say, both guarantees an absolutely contactless covering of each stack of goods regardless of their respective height up to the last part of the covering movement, as well as that for this limits the effort required, especially in terms of control technology.
  • this object is achieved according to the invention in that the further gripping devices are arranged below stationary gripping devices which bring about the complete opening or spreading apart of the hose.
  • the invention provides that the further gripping devices are designed in a manner known per se as a pair of rollers which receive the associated side fold edge between them.
  • the gripping devices can also be designed as clamping jaws, suction elements or the respective side fold edge between the sliding skids.
  • One role of a pair of rollers can expediently be pivotable from a position that releases the tube edge into a position that grips the tube edge. This ensures, among other things, that, for example, when stacking goods that correspond to the greatest possible stack height, the pairs of rollers are always kept out of engagement, but on the other hand when the goods are smaller stack heights can be brought into engagement. It does not matter whether the rollers are already in engagement with the associated side gusset edges during the entire lowering process of the hose via the stack of goods, or only come into engagement shortly before the welded hood is ejected.
  • pivoting takes place via a pneumatic or hydraulic drive, preferably a toggle lever drive, which does not exclude the pivoting also mechanically, for example via a corresponding linkage or electrically, e.g. with the help of a magnetic coil.
  • each pair of rollers is arranged in the frame of the device on a vertically movable carriage and its position can be adjusted relative to the carriage.
  • a very simple control of the tracking can be achieved, for example by means of a driver cam on the drive device of the gripping device for the lower edge of the opened hose.
  • the carriage can also have its own drive, for example by means of a chain which runs endlessly in the vicinity of the four corners of the device frame.
  • the adjustability can be done automatically, for example, by pneumatics or hydraulics controlled by sensors, or by adjusting the support elements on the slide, for example by means of elongated screw connections, which is particularly useful if the device usually covers stacks of the same basic dimensions with the hose that the adjustment and adjustment of the pairs of rollers can already be carried out in the factory during the manufacture of the device.
  • a stack of goods 3 is arranged on a carriageway 2 within a frame 1.
  • 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 fed via deflection rollers 6 and drive rollers 7 to a pre-spreading device which consists of sliding elements 8 arranged vertically movably in the area of the folded hose edges, below which a separating device 9 and a welding device 10 are arranged.
  • roof-shaped double conveyor belts 11 are arranged on both sides of the frame 1, the upper receiving ends being located below the sliding 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 20 can be changed to adapt to different cross-sectional dimensions of the stack of goods 3.
  • Each conveyor belt 11 is assigned a pivot lever 12 which is arranged approximately parallel to the associated double conveyor belt and can be pivoted about a lower fixed point 13 by means of an actuating device 14.
  • each rod 17 is adjustable in the longitudinal and transverse directions to adapt to different dimensions of the stack 3.
  • 1 further sled 21 are arranged vertically movable by means of chains 32 in the vicinity of the four corners of the frame.
  • the slides 21 each carry a pair of rollers 22 with a stationary roller 23 closer to the slide 21 and a pivotable roller 24.
  • the pairs of rollers 22 are fastened to a support plate 25, which in turn is pivotably arranged on a further support plate 26.
  • the support plate 26 is attached to the carriage 21 by means of elongated screw connections 27, as can be seen in particular from FIG. 2.
  • the roller 24 can be pivoted via a pneumatic cylinder-piston unit, which is only indicated in the figures and is designated 28.
  • the pneumatics act on a toggle lever 29 which engages a bearing plate 30 of the roller 24 and is pivotably arranged on the support plate 25 via the joint 31.
  • the operation of the device is as follows: after the completely spread-apart hose has left the discharge ends 20 of the double conveyor belts 11, the four side fold edges lie by retracting and swinging apart the rods 17 with head 18 into the four corners of the hose, each on the associated stationary roles 23, the pivotable rollers 24 being in the pivoted-out position. Then the rollers 24 swivel in and thus grip the respective side fold edge. If the desired hood length is reached by moving the carriage 16 down, the welding and cutting process is carried out and the hood is then pressed out of the double conveyor belts 11 with the aid of the swivel lever 12. Then the hood is held in eight points, namely by the K4fe 18 of the lower gripping device and the roller pairs 22.
  • the further lowering process of the hose hood is carried out by synchronously lowering the roller pairs 22 and the heads 18.
  • the rollers 24 swivel out and the Heads 18 are pulled out of the hood below.
  • the slides 16 and 21 then move back to their starting position and a new work cycle can begin.
  • the described embodiment can be modified in many ways without departing from the basic idea of the invention.
  • the four Rol lencrue be arranged on a common, for example hydraulically lowerable frame.
  • the pairs of rollers can be positioned under the dispensing ends 20 at the beginning of the working cycle when the roller 24 is swiveled in.
  • the gripping devices designed as double conveyor belts in the example shown which cause the hose to open completely or spread apart, by other devices such as double rollers at the beginning and end of the opening process.

Abstract

1. Apparatus for drawing a tube of heat-shrinkable plastics material from above over a stack of material, wherein the tube is drawn from a roll with its sides folded in and fed to a welding and severing means and a means for initially spreading the edges of the side folds and a means for completely spreading the tube apart and for drawing the tube over the stack without contact, with gripping means for the lower edge of the opened tube and further gripping means which, during the last part of the movement of drawing the tube over the stack, are movable downwardly, holding the four upper corner points of the side portions of the tube hood which has been formed in the meantime, jointly with the gripping means which engage the lower edge of the open tube, characterised in that the further gripping means are arranged below stationarily disposed gripping means which cause complete opening or spreading apart of the tube (5).

Description

Die Erfindung betrifft eine Vorrichtung zum Überziehen eines Schlauches aus wärmeschrumpffähigem Kunststoff von oben über einen Gutstapel, wobei der Schlauch seitlich eingefaltet von einer Rolle abgezogen und einer Schweiß- und Trenneinrichtung und einer Einrichtung zum Vorspreizen der Seitenfaltenränder und einer Einrichtung zum vollständigen Auseinanderspreizen und berührungslosen Überziehen des Schlauches über den Gutstapel zugeführt wird, mit Greifeinrichtungen für den unteren Rand des geöffneten Schlauches und weiteren Greifeinrichtungen, welche während des letzten Teils der Überziehbewegung des Schlauches gemeinsam mit den am unteren Rand des geöffneten Schlauches angreifenden Greifeinrichtungen, die vier oberen Eckpunkte der Seitenteile der inzwischen gebildeten Schlauchhaube haltend, abwärts bewegbar sind.The invention relates to a device for covering a hose made of heat-shrinkable plastic from above over a stack of goods, the hose being pulled laterally folded from a roll and a welding and separating device and a device for pre-spreading the side gusset edges and a device for fully spreading apart and contactless covering Hose is fed over the stack of goods, with gripping devices for the lower edge of the opened hose and other gripping devices, which together with the gripping devices acting on the lower edge of the opened hose during the last part of the pulling-over movement, the four upper corner points of the side parts of the meanwhile formed Holding the hose hood, can be moved downwards.

Bei einer bekannten Vorrichtung dieser Art (DE-OS 25 49 251.7-27) dienen die weiteren Greifeinrichtungen gleichzeitig auch zur vollständigen Öffnung bzw. Aufspreizung des Schlauches und sind dementsprechend neben ihrer vertikalen Beweglichkeit auch in horizontaler Richtung verschieblich. Der hierfür erforderliche Steuerungs-und Antriebsaufwand ist jedoch beträchtlich und insbesondere kompliziert und damit störanfällig, wobei noch besonders nachteilig hinzukommt, daß nach jeder Absenkbewegung einer Schlauchhaube das vorher abgetrennte Schlauchende in die betreffenden, als Klemmrollenpaare ausgebildeten Greifeinrichtungen eingefädelt werden muß, was aufgrund des relativ großen vertikalen Abstandes, bedingt durch die dazwischen angeordneten Schweiß- und Trenneinrichtungen, zwischen diesen weiteren Greifeinrichtungen und den oberhalb befindlichen Vorspreizeinrichtungen besonders problematisch ist. Dadurch werden jedoch die Vorteile dieser bekannten Vorrichtung gegenüber älteren Vorrichtungen, beispielsweise gemäß DE-PS 24 22 935 wieder in Frage gestellt, bei denen bei unterschiedlichen Gutseapelhöhen beim überziehen von Gutstapeln mit relativ niedriger Höhe wegen der Verwendung stationärer Greifeinrichtungen zum vollständigen Aufspreizen bzw. öffnen des Schlauches in Kauf genommen werden muß, daß der letzte Teil der Überziehbewegung der fertig gebildeten Schlauchhaube nicht vollständig geführt erfolgt, d.h. das obere verschweißte Schlauchhaubenende frei auf die Oberfläche des Gutstapels fällt, allerdings gedämpft durch den beim Überziehen der Schlauchhaube eintretenden Luftstau innerhalb der Haube.In a known device of this type (DE-OS 25 49 251.7-27), the further gripping devices also serve for the complete opening or spreading of the hose and, accordingly, are movable in the horizontal direction in addition to their vertical mobility. The necessary control and drive effort is considerable and particularly complicated and therefore prone to failure, with the additional disadvantage that after each lowering movement of a hose hood, the previously disconnected hose end must be threaded into the relevant gripping devices designed as pairs of clamping rollers, which is due to the relatively large vertical distance caused by the welding and separating devices arranged between them, between these further gripping devices and the pre-spreading devices located above, is particularly problematic. However, the advantages of this known device compared to older devices, for example according to DE-PS 24 22 935, are again questioned, in which at different crops heights when covering stacks of crops with a relatively low height due to the use of stationary gripping devices for the complete spreading or opening of Hose must be accepted that the last part of the pulling-over movement of the finished hose hood does not take place completely, i.e. the upper welded hose hood end falls freely on the surface of the stack of goods, but is dampened by the air build-up inside the hood when the hose hood is pulled over.

Aufgabe der Erfindung ist daher die Schaffung einer Lösung, welche die Vorteile der beiden zuvor beschriebenen bekannten Konstruktionen miteinander verbindet, ohne dafür deren Nachteile in Kauf nehmen zu müssen, d.h. konkret, sowohl ein absolut berührungsloses Überziehen jedes Gutstapels unabhängig von seiner jeweiligen Höhe bis zum letzten Teil der Überziehbewegung gewährleistet als auch den hierfür erforderlichen Aufwand, insbesondere in steuerungstechnischer Hinsicht, in Grenzen hält.The object of the invention is therefore to create a Lö solution, which combines the advantages of the two known constructions described above without having to accept their disadvantages, that is to say, both guarantees an absolutely contactless covering of each stack of goods regardless of their respective height up to the last part of the covering movement, as well as that for this limits the effort required, especially in terms of control technology.

Bei einer Vorrichtung der eingangs bezeichneten Art wird diese Aufgabe gemäß der Erfindung dadurch gelöst, daß die weiteren Greifeinrichtungen unterhalb von stationär angeordneten, das vollständige öffnen bzw. Auseinanderspreizen des Schlauches bewirkenden Greifeinrichtungen angeordnet sind.In a device of the type mentioned in the introduction, this object is achieved according to the invention in that the further gripping devices are arranged below stationary gripping devices which bring about the complete opening or spreading apart of the hose.

Aufgrund dieser Ausbildung kann praktisch von bewährten bekannten Maschinen der zuvor bereits erwähnten Art, nämlich gemäß DE-PS 24 22 935 ausgegangen werden, wobei es lediglich erforderlich ist, zusätzlich dicht unterhalb der Abgabeenden der dort vorgesehenen stationären Aufspreizeinrichtungen nur senkrecht bewegliche weitere Greifeinrichtungen anzuordnen, wobei hier das Einfädeln des unteren Schlauchendes jeweils keinerlei Probleme macht, da hier jede der an den vier Eckpunkten des aufgespannten Schlauches erforderliche Greifeinrichtung unmittelbar unterhalb der Abgabebereiche der stationären Aufspreiz-Greifeinrichtungen angeordnet sein kann. Dabei ist es besonders günstig, als stationäre Aufspreiz-Greifeinrichtungen Doppelförderbänder gemäß DE-PS 24 22 935 zu verwenden, da das Einfädeln des Schlauches in diese bei einem geringen Vorspringen des unteren Förderbandes besonders sauber und unproblematisch verläuft.Due to this design, practically known machines of the type already mentioned, namely according to DE-PS 24 22 935, can be assumed, whereby it is only necessary to arrange only vertically movable further gripping devices, just below the discharge ends of the stationary spreading devices provided there here the threading of the lower end of the hose does not cause any problems, since here each of the grippers required at the four corner points of the stretched hose direction can be arranged immediately below the delivery areas of the stationary spreading gripping devices. It is particularly advantageous to use double conveyor belts according to DE-PS 24 22 935 as stationary spreading gripping devices, since the threading of the hose into them is particularly clean and unproblematic with a slight protrusion of the lower conveyor belt.

In besonders zweckmäßiger Ausgestaltung sieht die Erfindung vor, daß die weiteren Greifeinrichtungen in an sich bekannter Weise als je ein den zugeordneten Seitenfaltenrand zwischen sich aufnehmendes Rollenpaar ausgebildet sind. Die Greifeinrichtungen können auch als Klemmbacken, Saugelementen oder den jeweiligen Seitenfaltenrand zwischen sich aufnehmende Gleitkufen ausgebildet sein.In a particularly expedient embodiment, the invention provides that the further gripping devices are designed in a manner known per se as a pair of rollers which receive the associated side fold edge between them. The gripping devices can also be designed as clamping jaws, suction elements or the respective side fold edge between the sliding skids.

Zweckmäßig kann je eine Rolle eines Rollenpaares aus einer den Schlauchrand freigebenden, in eine den Schlauchrand ergreifende Stellung verschwenkbar sein. Damit wird u.a. erreicht, daß beispielsweise bei Überziehen von Gutstapeln, die der größtmöglichen Stapelhöhe entsprechen, die Rollenpaare immer außer Eingriff gehalten werden, andererseits aber bei geringeren Gutstapelhöhen in Eingriff gebracht werden können. Es ist dabei gleichgültig, ob die Rollen während des gesamten Absenkvorganges des Schlauches über den Gutstapel bereits in Eingriff mit den zugeordneten Seitenfaltenrändern stehen, oder aber erst kurz vor dem Auswurf der geschweißten Haube in Eingriff gelangen.One role of a pair of rollers can expediently be pivotable from a position that releases the tube edge into a position that grips the tube edge. This ensures, among other things, that, for example, when stacking goods that correspond to the greatest possible stack height, the pairs of rollers are always kept out of engagement, but on the other hand when the goods are smaller stack heights can be brought into engagement. It does not matter whether the rollers are already in engagement with the associated side gusset edges during the entire lowering process of the hose via the stack of goods, or only come into engagement shortly before the welded hood is ejected.

Sehr vorteilhaft ist dabei, wenn die Verschwenkung über einen pneumatischen oder hydraulischen Antrieb, vorzugsweise einen Kniehebeltrieb erfolgt, was nicht ausschließt, die Verschwenkung auch mechanisch, beispielsweise über ein entsprechendes Gestänge oder elektrisch, z.B. mit Hilfe einer Magnetspule,zu bewirken.It is very advantageous if the pivoting takes place via a pneumatic or hydraulic drive, preferably a toggle lever drive, which does not exclude the pivoting also mechanically, for example via a corresponding linkage or electrically, e.g. with the help of a magnetic coil.

Zweckmäßig ist es, wenn jedes Rollenpaar im Gestell der Vorrichtung an einem vertikal verfahrbaren Schlitten angeordnet und in seiner Lage relativ zum Schlitten einstellbar ist. Durch das Vorsehen der Rollenpaare an einem verfahrbaren Schlitten läßt sich eine sehr einfache Steuerung des Nachführens, beispielsweise durch einen Mitnehmernocken an der Antriebsvorrichtung der Greifeinrichtung für den unteren Rand des geöffneten Schlauches, verwirklichen. Der Schlitten kann aber auch einen eigenen Antrieb, beispielsweise mittels in der Nähe der vier Ecken des Vorrichtungsgestelles endlos umlaufenden Kette aufweisen. Die Verstellbarkeit der Rollenpaare in ihrer Lage relativ zu den jeweiligen Schlitten, d.h. relativ zur Vorrichtung, ermöglicht die Anpassung an die verschiedenen Abmessungen der zu überziehenden Gutstapel. Die Einstellbarkeit kann dabei beispielsweise automatisch über von Sensoren gesteuerte Pneumatiken oder Hydrauliken erfolgen oder aber durch Verstellen der Tragelemente an den Schlitten, beispielsweise durch langlochgeführte Verschraubungen, was sich insbesondere dann anbietet, wenn die Vorrichtung in der Regel Stapel gleicher Grundrißabmessungen mit dem Schlauch überzieht, so daß die Einstellung und Justierung der Rollenpaare bereits werksseitig bei der Herstellung der Vorrichtung erfolgen kann.It is useful if each pair of rollers is arranged in the frame of the device on a vertically movable carriage and its position can be adjusted relative to the carriage. By providing the pairs of rollers on a movable carriage, a very simple control of the tracking can be achieved, for example by means of a driver cam on the drive device of the gripping device for the lower edge of the opened hose. However, the carriage can also have its own drive, for example by means of a chain which runs endlessly in the vicinity of the four corners of the device frame. The adjustability of the pairs of rollers in their position relative to the respective Carriage, ie relative to the device, enables adaptation to the different dimensions of the stack of goods to be covered. The adjustability can be done automatically, for example, by pneumatics or hydraulics controlled by sensors, or by adjusting the support elements on the slide, for example by means of elongated screw connections, which is particularly useful if the device usually covers stacks of the same basic dimensions with the hose that the adjustment and adjustment of the pairs of rollers can already be carried out in the factory during the manufacture of the device.

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

  • Fig. 1 eine Seitenansicht einer erfindungsgemäßen Vorrichtung,
  • Fig. 2 eine vergrößerte, teilweise geschnittene Ansicht des Führungsschlittens mit einem Rollenpaar und in
  • Fig. 3 eine Aufsicht auf ein Rollenpaar mit angedeutetem Schwenkmechanismus.
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,
  • Fig. 2 is an enlarged, partially sectioned view of the guide carriage with a pair of rollers and in
  • Fig. 3 is a plan view of a pair of rollers with indicated pivot mechanism.

Innerhalb eines Gestelles 1 ist auf einer Fahrbahn 2 ein Gutstapel 3 angeordnet.A stack of goods 3 is arranged on a carriageway 2 within a frame 1.

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 Gleitelementen 8 besteht, unterhalb welcher eine Trenneinrichtung 9 sowie eine Schweißeinrichtung 10 angeordnet sind.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 fed via deflection rollers 6 and drive rollers 7 to a pre-spreading device which consists of sliding elements 8 arranged vertically movably in the area of the folded hose edges, below which a separating device 9 and a welding device 10 are arranged.

Unterhalb der Gleitelemente 8 sind auf beiden Seiten des Gestelles 1 zwei dachförmig angeordnete Doppelförderbänder 11 angeordnet, wobei die oberen Aufnahmeenden um ihre unterhalb der Gleitelemente 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 20 zur Anpassung an verschiedene Querschnittsabmessungen des Gutstapels 3 veränderbar ist.Below the sliding elements 8, two roof-shaped double conveyor belts 11 are arranged on both sides of the frame 1, the upper receiving ends being located below the sliding 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 20 can be changed to adapt to different cross-sectional dimensions of the stack of goods 3.

Jedem Förderband 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.Each conveyor belt 11 is assigned a pivot lever 12 which is arranged approximately parallel to the associated 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 je ein Schlitten 16 mit je einer kurzen Stange 17 mit abgerundetem verdicktem Kopf 18 befestigt ist. Jede Stange 17 ist in Längs- und Querrichtung zur Anpassung an verschiedene Abmessungen des Gutstapels 3 verstellbar.In the frame 1 near the four corners of the same endless chains 15 are mounted, on each of which a carriage 16 is fastened with a short rod 17 with a rounded thickened head 18. Each rod 17 is adjustable in the longitudinal and transverse directions to adapt to different dimensions of the stack 3.

Neben den Schlitten 16 sind in der Nähe der vier Ecken des Gestelles 1 weitere Schlitten 21 vertikal mittels Ketten 32 verfahrbar angeordnet. Die Schlitten 21 tragen je ein Rollenpaar 22 mit einer dem Schlitten 21 näheren stationären Rolle 23 und einer schwenkbaren Rolle 24.In addition to the sled 16, 1 further sled 21 are arranged vertically movable by means of chains 32 in the vicinity of the four corners of the frame. The slides 21 each carry a pair of rollers 22 with a stationary roller 23 closer to the slide 21 and a pivotable roller 24.

Die Rollenpaare 22 sind an einer Tragplatte 25 befestigt, die ihrerseits verschwenkbar an einer weiteren Tragplatte 26 angeordnet ist. Die Tragplatte 26 ist mittels langlochgeführter Verschraubungen 27 am Schlitten 21 angebracht, wie insbesondere aus Fig. 2 hervorgeht.The pairs of rollers 22 are fastened to a support plate 25, which in turn is pivotably arranged on a further support plate 26. The support plate 26 is attached to the carriage 21 by means of elongated screw connections 27, as can be seen in particular from FIG. 2.

Über eine in den Figuren nur andeutungsweise dargestellte, mit 28 bezeichnete pneumatische Zylinder-Kolbeneinheit ist die Rolle 24 schwenkbar. Die Pneumatik wirkt dabei auf einen Kniehebel 29, der an eine Lagerplatte 30 der Rolle 24 eingreift und verschwenkbar an der Tragplatte 25 über das Gelenk 31 angeordnet ist.The roller 24 can be pivoted via a pneumatic cylinder-piston unit, which is only indicated in the figures and is designated 28. The pneumatics act on a toggle lever 29 which engages a bearing plate 30 of the roller 24 and is pivotably arranged on the support plate 25 via the joint 31.

Die Wirkungsweise der Vorrichtung ist wie folgt: Nachdem der vollständig auseinandergespreizte Schlauch die Abgabeenden 20 der Doppelförderbänder 11 verlassen hat, legen sich die vier Seitenfaltenränder durch Einfahren und Auseinanderschwenken der Stangen 17 mit Kopf 18 in die vier Ecken des Schlauches jeweils an die ihnen zugeordneten stationären Rollen 23 an, wobei die schwenkbaren Rollen 24 sich in der ausgeschwenkten Stellung befinden. Anschließend schwenken die Rollen 24 ein und ergreifen damit den jeweiligen Seitenfaltenrand. Ist die gewünschte Haubenlänge durch Herabfahren des Schlittens 16 erreicht, wird der Schweiß- und Schneidvorgang durchgeführt und die Haube anschließend aus den Doppelförderbändern 11 mit Hilfe der Schwenkhebel 12 ausgedrückt. Danach wird die Haube in acht Punkten gehalten, nämlich durch die K4fe 18 der unteren Greifeinrichtung und die Rollenpaare 22. Der weitere Absenkvorgang der Schlauchhaube erfolgt durch synchrones Absenken der Rollenpaare 22 und der Köpfe 18. Zur Freigabe der Haube schwenken die Rollen 24 aus und die Köpfe 18 werden aus der Haube unten ausgezogen. Danach fahren die Schlitten 16 und 21 in ihre Ausgangsstellung zurück und ein neues Arbeitsspiel kann beginnen.The operation of the device is as follows: after the completely spread-apart hose has left the discharge ends 20 of the double conveyor belts 11, the four side fold edges lie by retracting and swinging apart the rods 17 with head 18 into the four corners of the hose, each on the associated stationary roles 23, the pivotable rollers 24 being in the pivoted-out position. Then the rollers 24 swivel in and thus grip the respective side fold edge. If the desired hood length is reached by moving the carriage 16 down, the welding and cutting process is carried out and the hood is then pressed out of the double conveyor belts 11 with the aid of the swivel lever 12. Then the hood is held in eight points, namely by the K4fe 18 of the lower gripping device and the roller pairs 22. The further lowering process of the hose hood is carried out by synchronously lowering the roller pairs 22 and the heads 18. To release the hood, the rollers 24 swivel out and the Heads 18 are pulled out of the hood below. The slides 16 and 21 then move back to their starting position and a new work cycle can begin.

Natürlich ist das beschriebene Ausführungsbeispiel noch in vielfacher Hinsicht abzuändern, ohne den Grundgedanken der Erfindung zu verlassen. So können die vier Rollenpaare an einem gemeinsamen, beispielsweise hydraulisch absenkbaren Rahmen angeordnet sein. Ebenso ist es möglich, daß die Rollenpaare zu Beginn des Arbeitsspiels bereits im eingeschwenkten Zustand der Rolle 24 unter den Abgabeenden 20 positioniert sind. Auch ist es möglich, die im dargestellten Beispiel das vollständige Öffnen bzw. Auseinanderspreizen des Schlauches bewirkenden, als Doppelförderbänder ausgebildeten Greifeinrichtungen durch andere Einrichtungen wie Doppelrollen jeweils am Anfang und Ende des öffnungsvorganges zu ersetzen.Of course, the described embodiment can be modified in many ways without departing from the basic idea of the invention. So the four Rol lenpaare be arranged on a common, for example hydraulically lowerable frame. It is also possible for the pairs of rollers to be positioned under the dispensing ends 20 at the beginning of the working cycle when the roller 24 is swiveled in. It is also possible to replace the gripping devices designed as double conveyor belts in the example shown, which cause the hose to open completely or spread apart, by other devices such as double rollers at the beginning and end of the opening process.

Claims (5)

1. Vorrichtung zum überziehen eines Schlauches aus wärmeschrumpffähigem Kunststoff von oben über einen Gutstapel, wobei der Schlauch seitlich eingefaltet von einer Rolle abgezogen und einer Schweiß- und Trenneinrichtung und einer Einrichtung zum Vorspreizen der Seitenfaltenränder und einer Einrichtung zum vollständigen Auseinanderspreizen und berührungslosen Überziehen des Schlauches über den Gutstapel zugeführt wird, mit Greifeinrichtungen für den unteren Rand des geöffneten Schlauches und weiteren Greifeinrichtungen, welche während des letzten Teils der Überziehbewegung des Schlauches gemeinsam mit den am unteren Rand des geöffneten Schlauches angreifenden Greifeinrichtungen, die vier oberen Eckpunkte der Seitenteile der inzwischen gebildeten Schlauchhaube haltend, abwärts bewegbar sind, dadurch gekennzeichnet, daß die weiteren Greifeinrichtungen unterhalb von stationär angeordneten, das vollständige öffnen bzw. Auseinanderspreizen des Schlauches bewirkenden Greifeinrichtungen angeordnet sind.1. Device for covering a hose made of heat-shrinkable plastic from above over a stack of goods, the hose being pulled laterally from a roll and a welding and separating device and a device for pre-spreading the side fold edges and a device for fully spreading apart and contactless covering of the hose the stack of goods is fed, with gripping devices for the lower edge of the opened hose and further gripping devices which, during the last part of the pulling-over movement of the hose together with the gripping devices acting on the lower edge of the opened hose, holding the four upper corner points of the side parts of the hose hood which has now been formed , can be moved downwards, characterized in that the further gripping devices are arranged below stationary gripping devices which bring about the complete opening or spreading apart of the hose dnet are. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die weiteren Greifeinrichtungen in an sich bekannter Weise als je ein den zugeordneten Seitenfaltenrand zwischen sich aufnehmendes Rollenpaar (22) ausgebildet sind.2. Apparatus according to claim 1, characterized in that the further gripping devices are formed in a manner known per se as a pair of rollers (22) accommodating the associated side fold edge between them. 3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß je eine Rolle (24) jedes Rollenpaares (22) aus einer den Schlauchrand freigebenden in eine den Schlauchrand ergreifende Stellung verschwenkbar ist.3. Apparatus according to claim 2, characterized in that one roller (24) of each pair of rollers (22) is pivotable from a position releasing the hose edge into a position gripping the hose edge. 4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Verschwenkung über einen pneumatisch oder hydraulisch getriebenen Kniehebeltrieb (29) erfolgt.4. The device according to claim 3, characterized in that the pivoting takes place via a pneumatically or hydraulically driven toggle lever drive (29). 5. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß jedes Rollenpaar (22) im Gestell (1) der Vorrichtung an einem vertikal verfahrbaren Schlitten (21) angeordnet und in seiner Lage relativ zum Schlitten (21) einstellbar ist.5. Device according to one of the preceding claims, characterized in that each pair of rollers (22) in the frame (1) of the device arranged on a vertically movable carriage (21) and its position relative to the carriage (21) is adjustable.
EP79200046A 1978-06-12 1979-01-24 Device for pulling a tube of heat-shrinkable plastic over a stack of goods Expired EP0006249B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2825716 1978-06-12
DE19782825716 DE2825716A1 (en) 1978-06-12 1978-06-12 DEVICE FOR DRAWING A HOSE MADE OF HEAT-SHRINKABLE PLASTIC OVER A PILE OF GOODS

Publications (2)

Publication Number Publication Date
EP0006249A1 true EP0006249A1 (en) 1980-01-09
EP0006249B1 EP0006249B1 (en) 1980-11-26

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EP79200046A Expired EP0006249B1 (en) 1978-06-12 1979-01-24 Device for pulling a tube of heat-shrinkable plastic over a stack of goods

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EP (1) EP0006249B1 (en)
DE (2) DE2825716A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2573030A1 (en) * 1984-11-12 1986-05-16 Newtec Int METHOD AND MACHINE FOR PACKAGING A LOAD IN A SHEET STRING IN A FLEXIBLE MATERIAL

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2951364A1 (en) * 1979-12-20 1981-07-02 Nütro Patentverwertungs- u. Maschinen-Handels-GmbH, 8500 Nürnberg Machine for sheathing articles - has flat, gusset-folded flexible tube passed between roller clamps after wedges enter gusset folds, and then over articles

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1938960B2 (en) * 1969-07-31 1973-01-18 DEVICE FOR WRAPPING STACKS, IN PARTICULAR STACKS OF BRICKS
DE2344202A1 (en) * 1973-05-08 1974-11-21 Fernholt & Giertsen Article packaged in hot shrink sheet - supplied with double V folded edges gripped at all four corners
DE2026860B2 (en) * 1969-06-03 1975-02-13 Ingenioerfirmaet Boerge Christensen, Farum Device for packing goods by attaching a hose
DE2146464B2 (en) * 1970-09-18 1975-09-25 Societe D'applications Thermiques S.A., Aix-Les-Bains (Frankreich) Shrink film wrapping of pallet loads - using lateral guides to minimise film diameter for enclosing off-centre or irregular loads
DE2549251A1 (en) * 1975-11-04 1977-05-12 Nuetro Hirsch & Co DEVICE FOR COVERING A SIDE FOLDED HOSE OVER STACKED OBJECTS

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2026860B2 (en) * 1969-06-03 1975-02-13 Ingenioerfirmaet Boerge Christensen, Farum Device for packing goods by attaching a hose
DE1938960B2 (en) * 1969-07-31 1973-01-18 DEVICE FOR WRAPPING STACKS, IN PARTICULAR STACKS OF BRICKS
DE2146464B2 (en) * 1970-09-18 1975-09-25 Societe D'applications Thermiques S.A., Aix-Les-Bains (Frankreich) Shrink film wrapping of pallet loads - using lateral guides to minimise film diameter for enclosing off-centre or irregular loads
DE2344202A1 (en) * 1973-05-08 1974-11-21 Fernholt & Giertsen Article packaged in hot shrink sheet - supplied with double V folded edges gripped at all four corners
DE2549251A1 (en) * 1975-11-04 1977-05-12 Nuetro Hirsch & Co DEVICE FOR COVERING A SIDE FOLDED HOSE OVER STACKED OBJECTS

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2573030A1 (en) * 1984-11-12 1986-05-16 Newtec Int METHOD AND MACHINE FOR PACKAGING A LOAD IN A SHEET STRING IN A FLEXIBLE MATERIAL
EP0184485A1 (en) * 1984-11-12 1986-06-11 Newtec International Process and machine for packaging a load in a length of tubing of flexible material

Also Published As

Publication number Publication date
DE2960073D1 (en) 1981-02-12
DE2825716A1 (en) 1979-12-13
EP0006249B1 (en) 1980-11-26

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