EP0076867B1 - Procédé et dispositif pour recouvrir de grands objets à l'aide d'une feuille tubulaire - Google Patents

Procédé et dispositif pour recouvrir de grands objets à l'aide d'une feuille tubulaire Download PDF

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Publication number
EP0076867B1
EP0076867B1 EP81108096A EP81108096A EP0076867B1 EP 0076867 B1 EP0076867 B1 EP 0076867B1 EP 81108096 A EP81108096 A EP 81108096A EP 81108096 A EP81108096 A EP 81108096A EP 0076867 B1 EP0076867 B1 EP 0076867B1
Authority
EP
European Patent Office
Prior art keywords
fact
conformity
gripping devices
thru
foil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP81108096A
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German (de)
English (en)
Other versions
EP0076867A1 (fr
Inventor
Axel Frommelt
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE8181108096T priority Critical patent/DE3174412D1/de
Priority to EP81108096A priority patent/EP0076867B1/fr
Priority to AT81108096T priority patent/ATE19223T1/de
Publication of EP0076867A1 publication Critical patent/EP0076867A1/fr
Application granted granted Critical
Publication of EP0076867B1 publication Critical patent/EP0076867B1/fr
Expired 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
    • 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

Definitions

  • the invention relates to a method for covering larger objects, material stacks and the like with a tubular film, from which a film bag is opened on one side by creating a weld seam and this is placed over the object to be covered while keeping open from above (FR-A-2 417 435).
  • the invention is therefore based on the object of developing the method of the type described at the beginning - and the device used for carrying it out - in such a way that with a simple, uncomplicated structure of the device, even with the thinnest foils, there is no risk of tearing when the material is stacked over the like or the like. is avoided.
  • the film bag is formed with the opening facing downward, held open by gripping devices at its eight corners and then moved to the side over the object to be covered by means of a pivoting movement of the gripping devices, during which it remains in a vertical position is lowered over this.
  • the weld seam is gripped by a gripping device and the film tube is pulled off a film supply roll.
  • a defined withdrawal movement is achieved in this way.
  • the film tube is advantageously welded below the gripping devices and at the same time cut off between the welding device and gripper devices. Due to the simultaneity of these processes, the number of successive processes is reduced and the working speed is increased significantly.
  • the gripping devices are opened after the covering process and moved upwards, the film bag being shrunk from the bottom upwards by a heating device while the gripping devices are being raised. This measure also represents a considerably accelerated working method compared to the known prior art and saves a complete, separate working step.
  • the supplied film tube is withdrawn somewhat in order to set a defined starting position for the next operation.
  • the shrinking frame which brings about the action of heat, briefly lingers in the region of the upper edge of the object to be covered when it is raised. This ensures that the top of the object receives a sufficient amount of heat to shrink the bottom of the film bag.
  • a device is provided with a cutting device connected downstream of a film tube roll and a device for forming a weld seam and a gripping device for moving and holding the film bag open, which according to the invention is characterized by two times four, one above the other, arranged approximately in one plane Gripping devices, the gripping devices of the two levels being connected vertically, and a device for holding the film bag vertically during the pivoting movement of the gripping devices.
  • At least two guide rods are articulated on the struts vertically connecting the approximately horizontal gripping devices, the opposite ends of which are articulated in parallelogram fashion in turn on a cross strut on which a pivotally driven molded part releasably engages.
  • the device advantageously comprises a gripping device for gripping the weld seam and pulling off the film.
  • This gripping device is arranged above the approximately horizontal gripping devices which grasp the eight corners of the film bag and acts both as a pull-off aid and also helps to keep the film bag open.
  • Magnetic clamps for gripping the film tube are advantageously arranged at the ends of the gripper arms.
  • Such electromagnetically operated clamps can be easily controlled centrally and, on the other hand, ensure safe actuation.
  • pneumatic or hydraulic actuation of the gripper clamps is also conceivable.
  • the molded part engages when the film bag to be covered is formed by moving the gripper arms up and apart, and then carries out a pivoting movement of 180 °.
  • the film bag moves vertically in its position remaining in a pivoting movement to the side and is moved over the object to be covered.
  • the fitting can now be disengaged and the gripper arms can be lowered with the film bag.
  • pneumatic servomotors pivotally attached to the gripper arms of the gripper devices eccentrically to their pivot axis on the device frame.
  • the pivoting of the gripper arms is accomplished by these servomotors.
  • pneumatic servomotors are considered to be particularly suitable, it is within the scope of the invention to also use servomotors of a different type, that is, for. B. hydraulic or electrical.
  • the lower gripping devices enclose an obtuse angle open at the bottom in the spread-out state. This makes it possible to pull the film bag when pulling it down to the bottom of the object to be coated, e.g. B. to bring a pallet with stones stacked on it.
  • the two edges lying on one side of the film tube are each guided by a pair of rollers which are spaced apart from one another. This enables on the one hand a gentle and on the other hand a safe opening of the film tube, which also allows the use of very thin films without fear of tearing them.
  • the gripper devices are designed to be adjustable.
  • the device according to the invention can be easily adapted to different sizes of the objects to be coated.
  • the shrink frame is advantageously electrically heated. Compared to gas burners, for example, this type of heating is cheap because it is not affected by wind when it is installed outdoors.
  • the upper approximately horizontal gripping devices are movable along the vertical struts relative to the lower ones.
  • the film feed does not have to reach into the gripping area of the upper gripper arms through the lower gripper arms, but rather the upper gripper arms can be moved down to grasp the film and only then brought to the required distance from the lower gripper arms.
  • the upper gripper arms can advantageously be actuated pneumatically. In some applications, this can also make the gripper arms that grip the weld seam unnecessary.
  • a shrink film tube 2 is pulled off a film supply roll 1.
  • the tube 2 is guided and deflected by a first pair of rollers 3 and then, on the one hand, forcibly and on the other hand gently opened by the longitudinal edges 4 being guided on both sides of the folding 5 by a pair of rollers 6 and 7, respectively. This ensures a secure opening of the film tube even with strong adhesion.
  • roller pairs 6 and 7 a welding bar 8 and a transversely movable cutting device 9 are only shown schematically.
  • the material stack 10 to be coated is placed at a distance from the film supply roll 1 and the devices directly associated with it. This rests on a pallet 11.
  • the material stacks 10 can be brought up by a periodically operating conveyor belt and can be passed on after the covering.
  • the device 12 comprises vertical struts 13 which are arranged between the pairs of rollers 6 and 7, respectively.
  • the struts 13 carry the upper and lower approximately horizontal gripping devices 14 and 15 and the gripping devices 16.
  • the gripping devices 14 and 16 are movable along the struts 13.
  • Magnetic clamps 17 are attached to the ends of the gripping devices 14, 15, 16 for gripping the film tube 2.
  • guide rods 18 are articulated at their end points, the opposite ends of which are articulated in parallelogram fashion to a cross strut 19.
  • a pivotably driven molded part engages in the guide rods 18, which is not shown in detail.
  • This molded part can be moved up and down with a device 20.
  • This device 20 is only indicated schematically, as is the device for causing the pivoting movement of the molded part.
  • the respective drive motors 26 and 27 are also only indicated schematically in FIG. 2.
  • a shrink frame 21 is provided above the material stack 10 and can be moved up and down, encompassing the material stack 10.
  • the up and down movement of the shrink frame 21 is coordinated with that of the molded part which grips the guide rods 18.
  • the device according to the invention operates as follows: the film tube 2 is pulled off the film supply roll 1 and guided through the pairs of rolls 3 and 6 or 7.
  • the guide rods 18 have been lowered, as have the gripping devices 16 along the struts 13.
  • a weld seam 23 is produced by the welding bar 8. If a film bag 22 has already been pulled off before, the film tube 2 is cut off simultaneously with the welding process and thus in a time-saving manner with the aid of the cutting device 9.
  • the gripping devices 16 now grip the film bag 22 to be formed at the weld seam 23.
  • the gripping devices 16 are raised and the Gripping devices 14 grip the film bag 22 at the future upper corners 24 and move apart in order to fully open the bag 22 in this way.
  • the gripping devices 14 are then raised according to the height of the sack 22 to be formed and the gripping devices 15 are now brought into engagement in the region of the lower corners 25 of the sack 22 to be formed.
  • the film bag 22 is thus held at a total of ten points, in particular at the eight corner points, so that its shape is reliably defined.
  • the guide rods 18 are lowered and the film bag 22 is thus placed over the material stack 10.
  • the angular position of the gripping devices 15, which is open at the bottom, ensures that the film extends safely to the bottom of the stack to be covered.
  • the shrinking frame 21 is moved downward.
  • the lower gripping devices 15 are immersed in the shrink-down frame 21.
  • the magnetic clips 17 of the gripping devices 14, 15, 16 are now released and the gripping devices 14, 15, 16 are brought back into the starting position in the opposite direction.
  • the shrinking frame 21 also moves upward and thus causes the film to shrink due to the action of heat in one work process.
  • the device according to the invention can be used without problems for different film formats. All that is required is a corresponding adjustment of the clamps on the gripper arms and the roller pairs 6, 7. Of course, instead of an adjustability of the roller pairs 6, 7, it can also be provided that additional roller pairs are attached in accordance with the current film formats.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Claims (19)

1. Procédé pour couvrir resp. envelopper des objets plus grands, des tas de matériel etc. moyennant une feuille sous forme de tuyau (2), par laquelle grâce à un joint soudé (25), sera formé un sachet de feuille ouvert à un côté (22) et qui, en le tenant ouvert, est guidé, de haut en bas, sur l'objet à envelopper (10), caractérisé par le fait que le sachet de feuille (22) est tenu ouvert avec l'ouverture dirigée en bas, par des dispositifs- crochets (14, 15) qui le saisissent à ses huit coins (24, 25) et qui le transmettent ensuite moyennant un mouvement pivotant des dispositifs-crochet, pendant qu'il reste en position verticale, sur l'objet à couvrir resp. à envelopper et qui le baisse ensuite.
2. Procédé selon la prétention 1, caractérisé par le fait que le joint soudé (23) est saisi par un dispositif-crochet (16) et que le tuyau flexible de feuille (2) est tiré d'un rouleau de feuille (1).
3. Procédé selon prétention 1 ou 2, caractérisé par le fait que le tuyau flexible de feuille (2) est soudé au-dessous des dispositifs-crochet (14, 15, 16) et que, simultanément, il est détaché entre le dispositif de soudage (8) et les dispositifs-crochet (14, 15, 16).
4. Procédé selon une des prétentions 1 à 3, caractérisé par le fait que les dispositifs-crochet (14, 15) seront ouverts après le processus d'ouverture et qu'il sont retirés vers le haut, en même temps, pendant l'ascension des dispositifs-crochet (14, 15, 16), le sachet de feuille (22) se contracte de bas en haut moyennant l'action d'un dispositif de chauffement (21).
5. Procédé selon une des prétentions 1 à 4, caractérisé par le fait qu'après le découpage de la feuille, le tuyau flexible de feuille (2) sera retiré un peu pour ajuster une position de sortie pour le processus de travail suivant.
6. Procédé selon une des prétentions 1 à 5, caractérisé par le fait que l'influence de la chaleur qui est assuré par le cadre de contraction (21) cause aussi que, lors de l'ascension de celui-ci il s'arrête un peu dans le domaine de l'arrête supérieure de l'objet à couvrir (10).
7. Dispositif pour l'accomplissement du procédé selon une des prétentions 1 à 6, avec un dispositif de découpage (9) intercalé après un rouleau de tuyau flexible de feuille (1) et avec un dispositif (8) pour la formation d'un joint soudé (23) ainsi qu'un dispositif-crochet (14, 15, 16) pour le déplacement et la mise en état ouvert du sachet de feuille (22), caractérisé par le fait qu'il y a deux fois quatre dispositifs-crochet (14, 15) superposés dans un plan ; les dispositifs-crochet (14 resp. 15) des deux plans sont reliés verticalement, ainsi qu'un dispositif (18, 19) pour tenir verticalement le sachet de feuille pendant le mouvement pivotant des dispositifs-crochet.
8. Dispositif selon la prétention 7, caractérisé par le fait que, aux contrefiches (13) reliant verticalement les dispositifs-crochet (14, 15) en position à peu près horizontale, ont été articulées au moins deux tiges de guidage (18) dont les bouts opposés ont été articulés, comme un parallélogramme, à une tige transversale (19), où une pièce profilée commandée pivotante, s'engrène.
9. Dispositif selon prétention 7 ou 8, caractérisé par le fait qu'il y a un dispositif-crochet (16) pour saisir le joint soudé (23) et pour retirer le tuyau flexible de feuille (2).
10. Dispositif selon une des prétentions 7 à 9, caractérisé par le fait qu'aux bouts des dispositifs-crochet (14, 15, 16) il y a des crampes magnétiques (17) pour saisir le tuyau flexible de feuille.
11. Dispositif selon une des prétentions 7 à 10, caractérisé par le fait qu'il y a, aux bras des dispositifs-crochet (14, 15), excentriques à leur axe pivotant, aux contrefiches (13) des servomoteurs fixés de manière pivotante.
12. Dispositif selon une des prétentions 7 à 11, caractérisé par le fait que les dispositifs-crochet inférieurs (15), en état étrésilloné, incluent un angle obtus ouvert vers le bas.
13. Dispositif selon une des prétentions 7 à 12, caractérisé par le fait que les deux arêtes (4) situées à un côté du tuyau flexible de feuille, sont guidées à travers une paire de rouleaux à distance l'une de l'autre (6 resp. 7).
14. Dispositif selon une des prétentions 7 à 13, caractérisé par le fait que les dispositifs-crochet (14, 15) peuvent être ajustés.
15. Dispositif selon une des prétentions 7 à 14, caractérisé par le fait que le cadre de contraction (21) est chauffé électriquement.
16. Dispositif selon une des prétentions 7 à 14, caractérisé par le fait qu'au cadre de contraction (21) a été arrangé un dispositif laser.
17. Dispositif selon une des prétentions 7 à 16, caractérisé par le fait que les dispositifs-crochet supérieurs (14), à peu près horizontaux, sont relativement mobiles comparés avec les inférieurs.
18. Dispositif selon une des prétentions 7 à 17, caractérisé par le fait qu'il actionne, aux tiges de guidage (18), une chaîne transporteuse menée autour de l'équipement (12), du fait que les tiges de guidage (18) sont pivotées autour d'un centre fixe au bout lors de la transposition.
19. Dispositif selon une des prétentions 7 à 18, caractérisé par le fait qu'au lieu du cadre de contraction (21) ou à celui-ci il a été prévu un collier resp. un bandage.
EP81108096A 1981-10-09 1981-10-09 Procédé et dispositif pour recouvrir de grands objets à l'aide d'une feuille tubulaire Expired EP0076867B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE8181108096T DE3174412D1 (en) 1981-10-09 1981-10-09 Method and device for covering large objects with a tubular web
EP81108096A EP0076867B1 (fr) 1981-10-09 1981-10-09 Procédé et dispositif pour recouvrir de grands objets à l'aide d'une feuille tubulaire
AT81108096T ATE19223T1 (de) 1981-10-09 1981-10-09 Verfahren und vorrichtung zum ueberziehen groesserer gegenstaende mit einer schlauchfolie.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP81108096A EP0076867B1 (fr) 1981-10-09 1981-10-09 Procédé et dispositif pour recouvrir de grands objets à l'aide d'une feuille tubulaire

Publications (2)

Publication Number Publication Date
EP0076867A1 EP0076867A1 (fr) 1983-04-20
EP0076867B1 true EP0076867B1 (fr) 1986-04-16

Family

ID=8187948

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81108096A Expired EP0076867B1 (fr) 1981-10-09 1981-10-09 Procédé et dispositif pour recouvrir de grands objets à l'aide d'une feuille tubulaire

Country Status (3)

Country Link
EP (1) EP0076867B1 (fr)
AT (1) ATE19223T1 (fr)
DE (1) DE3174412D1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1229317B (it) * 1989-05-02 1991-08-08 Sestese Off Mec Macchina incappucciatrice automatica per l'imballaggio di prodotti, in particolare di unita' pallettizzate, con pellicola tubolare termoretraibile.
EP1106507A1 (fr) * 1999-12-09 2001-06-13 Effe 3 Tl Srl Proçédé et dispositif pour appliquer une housse sur un objet
FR2867452B1 (fr) * 2004-03-11 2007-06-01 Thimon Procede et dispositif de mise en forme et de depose a haute cadence d'une housse d'emballage sur une charge palettisee.
IT1401947B1 (it) * 2010-09-21 2013-08-28 Messersi Packaging Srl Macchina incappucciatrice.
CN116513549B (zh) * 2023-06-27 2023-09-01 佛山登奇机电技术有限公司 一种电机用自动包装生产线

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3778960A (en) * 1970-09-16 1973-12-18 B Christensen Automatic packing device for pallet stacks and the procedure peculiar hereto
NL7207219A (fr) * 1972-05-27 1973-11-29
CH634517A5 (de) * 1978-02-15 1983-02-15 Msk Verpackung Syst Gmbh Verfahren zur bildung sowie zum ueberziehen einer schrumpffolienhaube ueber ein einzuschrumpfendes stueckgut sowie vorrichtung zur durchfuehrung des verfahrens.

Also Published As

Publication number Publication date
DE3174412D1 (en) 1986-05-22
EP0076867A1 (fr) 1983-04-20
ATE19223T1 (de) 1986-05-15

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