EP0519116B1 - Procédé pour couvrir une pile d'objets avec une coiffe en matière étirable et dispositif pour la mise en oeuvre du procédé - Google Patents

Procédé pour couvrir une pile d'objets avec une coiffe en matière étirable et dispositif pour la mise en oeuvre du procédé Download PDF

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Publication number
EP0519116B1
EP0519116B1 EP91115042A EP91115042A EP0519116B1 EP 0519116 B1 EP0519116 B1 EP 0519116B1 EP 91115042 A EP91115042 A EP 91115042A EP 91115042 A EP91115042 A EP 91115042A EP 0519116 B1 EP0519116 B1 EP 0519116B1
Authority
EP
European Patent Office
Prior art keywords
stack
hood
articles
pallet
lower edge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91115042A
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German (de)
English (en)
Other versions
EP0519116A1 (fr
Inventor
Reiner W. 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
Original Assignee
Develog Reiner Hannen and Cie
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE9013049U external-priority patent/DE9013049U1/de
Priority claimed from DE9104072U external-priority patent/DE9104072U1/de
Application filed by Develog Reiner Hannen and Cie filed Critical Develog Reiner Hannen and Cie
Publication of EP0519116A1 publication Critical patent/EP0519116A1/fr
Application granted granted Critical
Publication of EP0519116B1 publication Critical patent/EP0519116B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the invention relates to a method for covering stretch film hoods over a stack of goods, in which a hood biased in the circumferential direction is pulled over the stack of goods and its lower edge is knocked under the stack of goods or a pallet carrying the stack of goods and fastened there.
  • the invention also relates to an apparatus for performing the method.
  • a stretch film hood is gathered in the longitudinal direction like an accordion and placed on rod-shaped holding elements of a tenter frame.
  • the holding elements are then moved apart with the aid of a tensioning drive, as a result of which the stretch film hood is pretensioned in the circumferential direction.
  • the tensioning frame is moved downwards along the stack of goods, the gathered stretch film hood being pulled off the holding elements and resting against the outside of the stack of goods.
  • Brakes that engage the hood sections between the holding elements control the tension of the Stretch film hood (DE-GM 90 01 319).
  • the object of the invention is to pull a stretch film hood wrinkle-free and so over a stack of goods that the hood can also absorb diagonal forces.
  • This object is achieved in that after covering the lower edge of the hood is grasped and re-tensioned in the longitudinal direction of the hood and then turned over.
  • the lower edge in the central region of at least two opposite sides of the stack of goods is to be gripped and re-tensioned.
  • the easiest way of tightening is to hold the lower edge of the hood stationary and to lift the stack of goods during tightening.
  • the stroke of the stack of goods can be dimensioned sufficiently large to compensate for all folds and the set the desired preload.
  • Brakes that work together with the stenter frame can be dispensed with.
  • the stack of goods is covered by a stretch film hood which is stretched uniformly on all sides and in all directions, so that it can absorb forces in all directions, even in diagonal directions.
  • the method according to the invention can advantageously be carried out with a device for covering stretch film hoods over a stack of goods, with a clamping frame which can move along the stack of goods and which has a clamping drive which can be adjusted relative to one another and which engage in the opened hood, with a vertically adjustable carrier for the Stack of goods and with a device arranged under the stack of goods or its support for fastening the lower edge of the hood to the stack of goods, and which is characterized in that devices for retensioning the hood are arranged between the holding elements of at least two opposite sides of the stack of goods.
  • the devices for re-tensioning should be arranged in the central area between adjacent holding elements.
  • the devices for retensioning have pliers, the opening gap of which is directed essentially vertically for gripping the lower edge of the hood guided by the holding elements.
  • the lower edge of the hood is then inserted directly into the opened tongs when the tensioning frame holding elements are pulled over and is held by the closed tongs when the tensioning frame holding elements have been removed.
  • the stack of goods is then raised to retighten the hood.
  • the pliers are moved under the stack of goods, so that the lower edge of the retensioned hood lies under the stack of goods or under the pallet and can be fastened there.
  • each device for retensioning has two pliers arranged at a distance from one another and an adhesive spraying device is arranged under the stack of material, which sprays the lower edge of the hood with adhesive in the area between the pliers. If the lower edge is then folded over under the stack of goods or under the pallet, it is immediately liable.
  • the liability can be further improved if a pressure roller which can be displaced with the tongs and is pressed against the underside of the stack of goods or the pallet is provided between the tongs of each device.
  • the pressure roller can be resiliently mounted; in a preferred embodiment, the pressure roller is assigned a pressure cylinder.
  • a further proposal of the invention is that groups of mutually coaxial heating disks are arranged in the region of at least two pallet sides, the axes of which extend parallel to the sides of the pallet, and that each group of Heating disks is assigned a drive with which the heating disks are guided in a rolling motion in the longitudinal direction of the film hood.
  • the lower edge of the film hood is only attached to the pallet in strips.
  • fastening strips are formed between the film material and the pallet material, which extend in the longitudinal direction of the film hood. With this orientation of the fastening strips, the forces transmitted by the film thereon are optimally absorbed, so that even thin areas of the film material do not have a negative effect.
  • the heating disks are preferably pressed resiliently against the pallet. This can be achieved in particular in that the heating disks are mounted on associated pivot levers, which in turn are articulated on a slide movable by the drive, and in that the pivot levers are supported on the slide by springs. Accordingly, the heating disks can follow bumps on the assigned surface of the pallet during their rolling movement and produce a continuous fastening strip between the film material and the pallet material.
  • a practical embodiment is characterized in that return springs are arranged between the heating disks and their pivoting levers, which return the heating disks to their retirement when the pressure on the assigned pallet surface subsides.
  • the heating discs move against the action of the return springs and the return movement of the heating discs is supported by the return springs.
  • the heating disks can preferably be heated using heating tapes which are laid on the circumference of the heating disks. This enables simple construction of the heating disks and simple electrical connections.
  • the heating disks can attack the underside of the pallet. If the palletized stack of goods is transported by a roller conveyor, it is expedient if the heating disks are arranged between the transport rollers of the conveyor.
  • the device for covering includes a tensioning frame, of which only holding elements 6 are shown, which in the embodiment shown consist of fingers pointing downwards.
  • the holding elements 6 are located in the area of the four floor plan corners of the stack of goods 1.
  • the opened stretch film hood is gathered in the longitudinal direction like an accordion and placed on the holding elements 6.
  • the holding elements 6 are then moved apart with the aid of a tensioning drive, as a result of which the stretch film hood 5 is pretensioned in the circumferential direction.
  • the tensioning frame with the holding elements 6 is moved downwards along the stack of goods 1, the gathered stretch film hood 5 being pulled off the holding elements 6 and resting on the outer sides of the stack of goods 1.
  • the stack of goods 1 with the pallet 2 is lifted off the roller conveyor 3 of the conveyor 4 by means of a lifting device 7. 1 shows this state.
  • Devices 8 for tensioning the stretch film hood 5 are arranged on both sides of the conveyor 4 and possibly also in the region of the end face of the stack of goods 1. Only one device 8 for retensioning is shown.
  • Each device 8 for retensioning consists of one Carriage 9, which can be moved horizontally on a bracket 10 of the conveyor 4 with the aid of a lifting cylinder 11.
  • two pliers 12 are arranged at a mutual distance such that their opening gap extends substantially vertically and the lower edge 13 of the stretch film hood 5 is transferred from the holding elements 6 into the opening gap of the pliers 12 or falls into it when the holding elements 6 have reached their lowest position, in which the lower edge 13 of the stretch film hood 5 detaches from the holding elements 6.
  • the pliers 12 are then closed with the aid of associated drives 14.
  • the tenter with the holding elements 6 moves upwards again (Fig. 2).
  • an adhesive spray device 15 which sprays the inside of the lower edge 13 of the stretch film hood 5 in the area between the two tongs 12 and optionally also at other points with an adhesive. Then the lower edge 13 of the stretched stretch film hood 5 is knocked under the pallet 2, in which the carriage 9 is moved with the pliers 12 by actuating the lifting cylinder 11 under the raised, palletized stack of goods 1.
  • a pressure roller 16 is arranged between the two pliers 12, which in the embodiment shown on an arm 17 pivotally mounted, double-armed lever is mounted, on the other arm 18 engages a lifting cylinder 19 as a drive.
  • the lifting cylinder 19 is also actuated, so that at least the portion of the lower edge 13 of the stretch film hood 5 provided with adhesive is pressed against the underside of the pallet 2 and fastened thereon (FIG. 3).
  • the pliers 12 are opened as soon as the pressure roller 16 has reached the necessary pressure force.
  • the tensioning frame with the holding elements 6 has meanwhile moved upward and is available for receiving a new stretch film hood 5.
  • the device shown in FIG. 5 belongs to a device for covering stretch film hoods 101 over a stack of goods 103 arranged on a pallet 102, as described in principle in DE-GM 90 03 319.
  • the palletized stack of goods 102, 103 is transported on a roller conveyor, on the transport rollers 104 of which the pallet 102 is supported with its underside.
  • a lifting device 105 is provided, with which the stacked goods stack 102, 103 is raised so that the stretch film hood 101 can be pulled over it and its lower edge 106 can be knocked under the underside of the pallet 102.
  • Movable clamping jaws 107 hold assigned sections of the stretch film hood 101 until the lower edge 106 has been folded under the pallet 102.
  • the device described below serves to secure the lower edge 106 of the stretch film hood 101.
  • This device includes, in the area of each long side of the pallet 102, heating disks 108 arranged coaxially to one another, which in the embodiment shown (see in particular FIGS. 6, 7) each have a circular sector-shaped plan and which are covered on the circumference with heating tapes 109, to which electrical connections 110 are assigned are.
  • the heating disks 108 are arranged between the transport rollers 104 of the roller conveyor and are rotatably mounted on associated pivot levers 111, which in turn are articulated at 112 to a carriage 113.
  • the carriage 113 is displaceable on a support 114 fixed to the frame parallel to the axis of the transport rollers 104 or to the underside of a pallet, with the aid of a drive 115, which in the embodiment shown is a lifting cylinder.
  • the pivot levers 111 are supported on the slide 113 by means of compression springs 116.
  • a return spring 117 extends between each heating disc 108 and the associated pivot lever 111.
  • the heating disks 108 or their heating tapes 109 have a width of 5 to 15 mm.
  • the device described so far works as follows: If the stretch film hood 101 has been covered over the palletized stack of goods 102, 103 raised with the lifting device 105 and its lower edge 106 has been folded over under the pallet, the palletised stack of goods 102, 103 is lowered until it rests on the transport rollers 104. Then the drives 115 of the carriages 113 are actuated so that the carriages 113 move in the direction of the arrow 118 (FIG. 6). When the heating disks 108 with their heating tapes 109 reach the area of the underside of the pallet 102, they roll on the underside of the pallet 102 or on the edge 106 of the stretch film hood 101 located there.
  • the film material is heated and softened, so that it forms a connection with the pallet material.
  • the film material is pressed into the rough surface of the wood, creating a toothing between the wood and the film material.
  • fastening strips 119 are formed which extend in the longitudinal direction of the stretch film hood 101.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
  • Pile Receivers (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Package Closures (AREA)
  • Closing Of Containers (AREA)

Claims (18)

  1. Procédé pour recouvrir une pile de marchandises d'une housse en pellicule étirable, dans lequel on fait passer sur la pile de marchandises (1) une housse (5) tendue au préalable dans la direction de la périphérie, on rabat son bord inférieur (13) sous la pile de marchandises (1) ou sous une palette (2) qui porte la pile de marchandises (1) et on le fixe à cet endroit, caractérisé par le fait que l'on saisit le bord inférieur (13) de la housse (5) après l'avoir fait passer sur la pile, et qu'on le soumet à une tension supplémentaire dans la direction longitudinale de la housse en le rabattant ensuite.
  2. Procédé selon la revendication 1, caractérisé par le fait que l'on saisit et soumet à une tension supplémentaire le bord inférieur (13) dans la région centrale d'au moins deux côtés opposés de la pile de marchandises (1).
  3. Procédé selon la revendication 1 ou 2, caractérisé par le fait que l'on maintient fixe le bord inférieur (13) de la housse (5) lorsqu'on la soumet à une tension supplémentaire, et que l'on soulève la pile de marchandises (1).
  4. Dispositif pour la mise en oeuvre du procédé selon l'une des revendications 1 à 3, comprenant un cadre tendeur, celui-ci étant mobile le long de la pile de marchandises (1) et comportant des éléments de retenue (6) qui peuvent être déplacés les uns par rapport aux autres par un mécanisme tendeur et qui pénètrent dans la housse ouverte (5), comprenant un support (7) qui peut être déplacé verticalement et qui est destiné à la pile de marchandises (1), et comprenant un dispositif qui est destiné à fixer le bord inférieur (13) de la housse (5) à la pile de marchandises (1) et qui est disposé sous la pile de marchandises (1) ou sous son support (7), caractérisé par le fait que des dispositifs (8) destinés à soumettre la housse (5) à une tension supplémentaire sont disposés entre les éléments de retenue (6) d'au moins deux côtés opposés de la pile de marchandises (1).
  5. Dispositif selon la revendication 4, caractérisé par le fait que les dispositifs (8) qui sont destinés à imprimer une tension supplémentaire sont disposés dans la région centrale entre des éléments de retenue voisins (6).
  6. Dispositif selon la revendication 4 ou 5, caractérisé par le fait que les dispositifs (8) qui sont destinés à imprimer une tension supplémentaire comportent des pinces (12) dont les fentes d'ouverture sont dirigées verticalement pour l'essentiel, afin de saisir le bord inférieur (13) de la housse (5) qui est guidé par les éléments de retenue (6).
  7. Dispositif selon l'une des revendications 4 à 6, caractérisé par le fait que les pinces (12) peuvent être déplacées pour venir sous la pile de marchandises (1) après que l'on a soulevé la pile de marchandises (1) qui est recouverte par la housse (5).
  8. Dispositif selon l'une des revendications 4 à 7, caractérisé par le fait que chaque dispositif destiné à imprimer une tension supplémentaire (8) comporte deux pinces (12) qui sont disposées à distance l'une de l'autre, et par le fait que sous la pile de marchandises (1) est disposé un dispositif de pulvérisation de colle (15) qui pulvérise de la colle sur le bord inférieur (13) de la housse (5) dans la région située entre les pinces (12).
  9. Dispositif selon l'une des revendications 4 à 8, caractérisé par le fait qu'il est prévu entre les pinces (12) de chaque dispositif (8) un rouleau de serrage (16) qui peut être déplacé avec les pinces (12) et qui peut être serré contre le côté inférieur de la pile de marchandises (1) ou de la palette (2), respectivement.
  10. Dispositif selon l'une des revendications 4 à 9, caractérisé par le fait qu'un vérin de serrage (19) est associé au rouleau de serrage (16).
  11. Dispositif selon l'une des revendications 4 à 10, dans lequel le bord est serré contre la palette au moyen d'au moins un disque chauffant mobile, ce qui relie la matière de la pellicule à la matière de la palette, caractérisé par le fait que sont disposés dans la région d'au moins deux côtés de la palette des groupes de disques chauffants (108) qui sont coaxiaux les uns par rapport aux autres et dont les axes s'étendent parallèlement aux côtés de la palette (102), et par le fait qu'à chaque groupe de disques chauffants (108) est associé un entraînement (115) au moyen duquel les disques chauffants (108) sont amenés à se déplacer en roulant dans la direction longitudinale de la housse en pellicule (101).
  12. Dispositif selon la revendication 11, caractérisé par le fait que les disques chauffants (108) sont serrés élastiquement contre la palette (102).
  13. Dispositif selon la revendication 11 ou 12, caractérisé par le fait que les disques chauffants (108) sont montés tournants sur des leviers pivotants associés (111) qui sont articulés pour leur part sur un chariot (113), celui-ci pouvant être déplacé par l'entraînement (115), et par le fait que les leviers pivotants (111) s'appuient sur le chariot (113) par l'intermédiaire de ressorts (116).
  14. Dispositif selon l'une des revendications 11 à 13, caractérisé par le fait que des ressorts de rappel (117) sont disposés entre les disques chauffants (108) et leurs leviers pivotants (111).
  15. Dispositif selon l'une des revendications 11 à 14, caractérisé par le fait que les disques chauffants (108) sont revêtus de bandes chauffantes (109) du côté de leur pourtour.
  16. Dispositif selon l'une des revendications 11 à 15, caractérisé par le fait que les disques chauffants (108) viennent en prise avec le côté inférieur de la palette (102).
  17. Dispositif selon la revendication 16, caractérisé par le fait que les disques chauffants (108) sont disposés entre les rouleaux transporteurs (104) d'un convoyeur.
  18. Dispositif selon l'une des revendications 11 à 15, caractérisé par le fait que les disques chauffants (108) viennent en prise avec les côtés de la palette (102).
EP91115042A 1990-09-13 1991-09-06 Procédé pour couvrir une pile d'objets avec une coiffe en matière étirable et dispositif pour la mise en oeuvre du procédé Expired - Lifetime EP0519116B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE9013049U 1990-09-13
DE9013049U DE9013049U1 (de) 1990-09-13 1990-09-13 Vorrichtung zum Sichern des unteren Randes von über palettierte Gutstapel gezogener Stretchfolienhauben
DE9104072U DE9104072U1 (de) 1991-04-04 1991-04-04 Vorrichtung zum Überziehen von Stretchfolienhauben über einen Gutstapel
DE9104072U 1991-04-04

Publications (2)

Publication Number Publication Date
EP0519116A1 EP0519116A1 (fr) 1992-12-23
EP0519116B1 true EP0519116B1 (fr) 1995-08-16

Family

ID=25957166

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91115042A Expired - Lifetime EP0519116B1 (fr) 1990-09-13 1991-09-06 Procédé pour couvrir une pile d'objets avec une coiffe en matière étirable et dispositif pour la mise en oeuvre du procédé

Country Status (6)

Country Link
US (1) US5247783A (fr)
EP (1) EP0519116B1 (fr)
AT (1) ATE126490T1 (fr)
DE (1) DE59106276D1 (fr)
DK (1) DK0519116T3 (fr)
ES (1) ES2077751T3 (fr)

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* Cited by examiner, † Cited by third party
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DE4327450C1 (de) * 1993-08-14 1995-01-05 Moellers Maschf Gmbh Verfahren und Vorrichtung zum Überziehen einer Stretchfolienhaube über einen Gutstapel
ES2130024B1 (es) * 1996-01-26 2000-01-16 Mecanizacion Del Transporte Y Dispositivo y procedimiento para retractilar una lamina de plastico sobre mercancias paletizadas.
PT1147050E (pt) * 1999-01-28 2003-01-31 Msk Verpackunsg Systeme Gmbh Dispositivo para o encolhimento de uma folha que encolhe por accao do calor
EP1059233A1 (fr) * 1999-04-16 2000-12-13 Kl- Lachenmeier A/S Procédé et dispositif pour emballer des objets dans une housse en feuille
ATE242720T1 (de) * 2000-08-09 2003-06-15 Lachenmeier As Verfahren und vorrichtung zum verpacken von gegenständen
EP1497176B9 (fr) * 2002-04-19 2008-01-09 Msk-Verpackungs-Systeme Gesellschaft Mit Beschränkter Haftung Dispositif et procede d'emballage d'articles unitaires ou de lots
ITBO20040174A1 (it) * 2004-03-26 2004-06-26 Aetna Group Spa Apparecchiatura per la copertura di gruppi di prodotti con film tubolare estensibile
US7861500B2 (en) * 2008-07-14 2011-01-04 Bradley Arthur Bennett Automatic cart bagger
KR20130089035A (ko) * 2012-02-01 2013-08-09 삼성전자주식회사 수축 포장 시스템
DK3147226T3 (da) * 2015-09-23 2018-10-15 Msk Verpackung Syst Gmbh Fremgangsmåde til dannelse af et frirum i en emballage, der består af krympefolie, og som sikrer en godsstabel på en palle, såvel som en formeindretning til realisering af fremgangsmåden
DE102016212436B4 (de) * 2016-07-07 2018-07-26 Signode Industrial Group Llc Verpackungsverfahren und Haubenstretchanlage
CN106240936B (zh) * 2016-08-31 2018-08-28 上海古鳌电子科技股份有限公司 一种票据袋的黏结装置
US11492155B2 (en) 2020-05-14 2022-11-08 Signode Industrial Group Llc Stretch-hood machine

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EP0077508B1 (fr) * 1981-10-16 1985-04-03 MSK-Verpackungs-Systeme Gesellschaft mit beschränkter Haftung Procédé et dispositif d'emballage de piles d'objets palettisés
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DE8616963U1 (de) * 1986-06-25 1989-02-09 Möllers Maschinenfabrik GmbH, 4720 Beckum Vorrichtung zum Überziehen und Anschrumpfen einer Schrumpffolienhaube über bzw. an einen Stapel.
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DE9001319U1 (de) * 1990-02-06 1990-04-12 MSK-Verpackungs-Systeme GmbH, 47533 Kleve Vorrichtung zum Überziehen von Stretchfolienhauben über einen Gutstapel
DE9013049U1 (de) * 1990-09-13 1990-12-06 Develog, Reiner Hannen & Cie, Courtelary Vorrichtung zum Sichern des unteren Randes von über palettierte Gutstapel gezogener Stretchfolienhauben
DE9104072U1 (de) * 1991-04-04 1991-06-20 Develog, Reiner Hannen & Cie, Courtelary Vorrichtung zum Überziehen von Stretchfolienhauben über einen Gutstapel

Also Published As

Publication number Publication date
ATE126490T1 (de) 1995-09-15
DK0519116T3 (da) 1996-01-15
EP0519116A1 (fr) 1992-12-23
US5247783A (en) 1993-09-28
DE59106276D1 (de) 1995-09-21
ES2077751T3 (es) 1995-12-01

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