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EP0460681B1 - Installation pour plier en accordéon et/ou étirer une gaine tubulaire d'emballage étirable - Google Patents

Installation pour plier en accordéon et/ou étirer une gaine tubulaire d'emballage étirable Download PDF

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Publication number
EP0460681B1
EP0460681B1 EP19910109317 EP91109317A EP0460681B1 EP 0460681 B1 EP0460681 B1 EP 0460681B1 EP 19910109317 EP19910109317 EP 19910109317 EP 91109317 A EP91109317 A EP 91109317A EP 0460681 B1 EP0460681 B1 EP 0460681B1
Authority
EP
European Patent Office
Prior art keywords
frame
frame portion
film
portions
piece goods
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
EP19910109317
Other languages
German (de)
English (en)
Other versions
EP0460681A1 (fr
Inventor
Hans Dipl.-Ing.; Dipl.-Ing.(Fh) Lauhoff
Werner Uthoff
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.)
Beumer Maschinenfabrik GmbH and Co KG
Original Assignee
Beumer Maschinenfabrik GmbH and Co KG
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
Application filed by Beumer Maschinenfabrik GmbH and Co KG filed Critical Beumer Maschinenfabrik GmbH and Co KG
Publication of EP0460681A1 publication Critical patent/EP0460681A1/fr
Application granted granted Critical
Publication of EP0460681B1 publication Critical patent/EP0460681B1/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 device for reefing and / or stretching tubular or hood-shaped stretch film when wrapping piece goods, in particular cuboid or cube-shaped stacked piece parts, such as, for example, and in particular multi-layer, palletized piece goods stack, by means of stretch film, with one of several essentially existing (reef) frame arranged in a plane, bow-shaped frame sections, over which the supplied, spread (tubular) stretch film is to be drawn before the piece goods are wrapped, the clear frame contour being larger is (or has to be made larger) than the outer contour of the piece goods to be wrapped, the frame sections have an essentially continuous, preferably rounded or curved shape, at least in the area of their outside that comes into engagement with the stretch film, and the frame sections each have a Frame section support are held.
  • stretch film with one of several essentially existing (reef) frame arranged in a plane, bow-shaped frame sections, over which the supplied, spread (tubular) stretch film is to be drawn before the piece goods are wrapped, the clear frame contour
  • a device for wrapping piece goods with a stretch film hood is known from DE-GM 88 08 508.
  • the tubular stretch film is partially pulled off a film supply by a pull-off device and separated from the film supply by means of a cutting device, the pull-off device being provided with a spreading device for pulling apart and later spreading apart the film section which later forms a hood, and a reefing device downstream of the spreading device for reefing the Film section over a vertical distance which is less than the length of the film section, in addition a welding device arranged between the spreading device and the reefing device for forming a seam, and finally a stretching device by means of which the film section is to be stretched, and a lifting device by means of which the formed hood is finally to be pulled over the piece goods to be wrapped underneath.
  • the reefing and stretching device has a so-called reefing frame, which consists of four bow-shaped frame sections ("reefing bars”) arranged in a horizontal plane, each of which has the shape of an isosceles L in plan view, the apex area being rounded off.
  • the tubular or dome-shaped stretch film is guided over these bow-shaped frame sections before the piece goods are wrapped and applied to the frame section supports ("reef spars") in the reefed state (that is to say in the form of folds) before the stretching is then carried out by moving the bow-shaped frame sections apart, and the stretched film hood is then pulled over the piece goods to be wrapped, whereby they are pulled together for the purpose of creation a transport lock and a weather-resistant loading unit should be placed intimately on the piece goods.
  • the frame section supports that is to say in the form of folds
  • the film may only be pulled over the bow-shaped frame sections at a relatively low speed in order to avoid overstretching. If, however, there is a very low coefficient of friction, at least a relatively high lowering speed must be used if, in addition to the horizontal stretch already indicated above, it is also advantageous to obtain a considerable vertical stretch of the film material.
  • the present invention has for its object to improve the known reefing and / or stretching devices in particular to the effect that not only a proper clamping and ref fen of the tubular film material, but in particular also an optimal, perfect sliding off the device (to the piece goods to be wrapped ) is possible.
  • the frame section supports are each formed with a flat (ie no longer essentially linear) outside, which faces away from the (bottom) side of the frame section in question in the film feed direction (facing away from the film feed direction ( downwards), and which - essentially following the shape of the relevant frame section in a projection plane running transversely to the film feed direction - extends at least at the upper end section essentially over the length of the relevant frame section.
  • the frame supports can be plate-shaped (and, of course, curved at least in the "corner area") and can consist, for example, of sheet metal, but they can also be made, for example, of appropriately designed plastic blocks or the like.
  • Another variant that makes use of the inventive concept consists, for example, in that the frame section supports each consist of essentially parallel rods or the like. exist, the outer envelope forms a flat outside, so that the effect sought according to the invention can be achieved at least substantially.
  • the outer side of the frame section supports facing the film material each be conically tapered from the relevant frame section, in which case the free edge of a frame section support removed from the frame section lies (still) outside the contour of the piece goods to be wrapped or is to be brought into such a position.
  • the frame sections preferably each project laterally over their support, so that the latter is, as it were, undercut, the protrusion of the outer contour of the frame sections above their associated support preferably decreasing towards the end sections of the relevant frame section.
  • the frame sections are each arranged in a corner area, whereby they can preferably be formed in a circular arc shape in their central area over an angle of approximately 90 ° and, in a further embodiment, can be formed on the essentially circular arc shape Section can connect a section at both ends, which has a small curvature or is angled inwards.
  • the frame section supports are preferably formed in each of their two end regions essentially tangentially to the curvature of the films stretched between them, so that an optimal transition is ensured.
  • the central region of the frame section supports can be excluded in each case, the mutually facing edge sections on the recessed part of a frame section support then preferably being rounded or curved inward in order to ensure unimpeded entry and exit .
  • At least one reefing roller can be assigned to each or each frame section, wherein the reefing rollers can each be movable towards or away from the frame section assigned to them. It has been found that the reefing rollers should preferably be arranged in each case on the upper region of a frame section support in order not to hinder the actual reefing process in any way.
  • the frame sections are to be moved apart in such a way that their mutual distance increases.
  • the frame sections are essentially only available in the corner areas. Rather, at least two (possibly also all) frame sections adjacent to one another can be connected to one another, and in such an embodiment preferably telescopically, in order to nevertheless be able to move apart expediently.
  • FIG. 1 to 4 show a stacked, multi-layer, cuboid piece goods stack 1 by means of a palletizing device, which is to be wrapped with a film hood 2 consisting of stretch film (stretch film) tubular stretch film material 3 is formed, which is supplied from a tubular film supply, not shown.
  • a film hood 2 consisting of stretch film (stretch film) tubular stretch film material 3 is formed, which is supplied from a tubular film supply, not shown.
  • Fig. 2 shows the state in which the supplied tubular stretch film material 3 has already been separated from the formed film hood 2, which for this purpose has received a transverse seam 5 at its upper end by means of a welding device 4.
  • the film hood 2 has already been essentially thrown onto the reefing and stretching device.
  • FIG. 3 shows how the hood 2 which has been fitted onto the reefing and stretching device has been stretched horizontally in the direction of the arrows 6 by moving apart its frame sections, which are described in more detail below, in order to be able to be pulled over the packaged goods stack 1; and
  • FIG. 4 shows an intermediate step in wrapping the piece goods stack 1, in which the upper end section of the piece goods stack 1 is already covered by the film material of the film hood 2, while the lower end section of the piece goods stack is still free, but when the reefing and stretching device is further lowered in Direction of arrows 7 will still be wrapped.
  • the reefing and stretching device already mentioned repeatedly has a reefing frame which essentially consists of four bow-shaped frame sections 8 arranged in a (horizontal) plane (of which only visible in FIG. 5) two frame sections 8 are shown), and which are each arranged in a corner area at a distance from the piece goods to be wrapped, which is indicated in FIG. 5 with a dash-two-dot line.
  • the frame sections 8 each consist of round material and are each formed in a circular arc shape in their central area in the top view over an angle ⁇ of 90 °. At both ends of the middle circular section there is a section 10 which has a smaller curvature or is angled inwards, so that the ends 11 of the bow-shaped frame sections 8 or their end sections 10 are free of the film material of the hood 2 and for the latter there is an optimal transition into the "free path" to the neighboring frame section 8.
  • the frame sections 8 each project laterally beyond their frame section support 12, so that the latter is, as it were, undercut. This protrusion a decreases at / towards the end sections 10, as can be seen from the lower part of FIG. 5.
  • the frame section supports 12 are each formed with a flat outer side 13 and extend downward from the underside 15 (see FIG. 6) of the relevant frame section 8 facing away from the film feed direction 14 (see FIG. 1) in the film feed direction 14 , namely in a (horizontal) projection plane running transversely to the film feed direction 14, essentially following the shape of the relevant frame section 8, at least in the area from the end sections into a central area.
  • the frame section supports 12, referred to above and below as "supports”, are in the illustrated embodiment plate-shaped and made of sheet metal. You could, however, or the like in a variant, for example, also from a plurality of parallel rods. exist, whose outer envelope forms a flat outside in the sense of the present invention.
  • the supports 12 made of sheet metal each taper downwards from the associated frame section 8, the central region 12 ′ of the supports 12 being excluded in each case and the facing edge sections 16, 16 are rounded off on the recessed part 12 '.
  • the supports 12 (viewed in plan view) each run at their two end regions 17 essentially tangentially to the curvature of the film 2 to be clamped between them, so that there is an excellent transition.
  • the frame sections 8 are each assigned a reefing roller, not shown in detail in the drawing, which can be swiveled (and accordingly also swung away again) to the frame portion 8 assigned to it, specifically the reefing rollers are each arranged in the upper region of a support 12, around which Do not hinder reefing in any way.
  • the frame sections 8 are to be moved apart according to FIG. 3, increasing their mutual distance, in order to close the film hood 2 in the form already described stretch.
  • the lower end section of the tubular stretch film material 3 is therefore first pulled over the four bow-shaped frame sections 8 and is detected by the reefing rollers, which are not shown in detail in the drawing, which the film material 3 in the manner shown in Fig. 2 reef over the bow-shaped frame sections 8 on the frame section supports 12.
  • the (elastic) film can be seen due to the formation of the frame sections 8 - especially at the transition sections - not overstretched. Rather, due to the highly expedient configuration of the bow-shaped frame sections 8 according to the invention (in the plan view, see FIG. 5), an extremely smooth transition to the “free areas” takes place.
  • the reefing and spreading device is an embodiment which, at relatively high working speeds and corresponding throughput capacity, leads to an optimal wrapping of piece goods with a tubular shape or hood-shaped stretch film and leaves nothing to be desired, neither in technical nor in economic terms.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Claims (20)

  1. Dispositif pour plisser et/ou étirer un film étirable en forme de gaine ou de housse lors de l'emballage de colis, au moyen d'un film étirable, en particulier d'éléments formant colis et empilés en forme de parallélépipède ou de cube, comme par exemple et en particulier de piles formant colis à plusieurs couches et palettisées, ledit dispositif comprenant un cadre (de plissage) qui est constitué de plusieurs segments de cadre en forme d'étriers disposés sensiblement dans un même plan et sur lesquels le film étirable amené sous forme déployée doit passer avant d'emballer le colis, le contour intérieur du cadre étant plus grand/devant être rendu plus grand que le contour extérieur du colis que l'on veut emballer, les segments de cadre présentant, au moins dans la zone de leur côté extérieur venant en contact avec le film étirable, une forme sensiblement régulière, de préférence arrondie ou courbe, et les segments de cadre étant chacun maintenus au moyen d'un support de segment de cadre, caractérisé en ce que les supports de segments de cadre (12) présentent chacun un côté extérieur à deux dimensions qui s'étend dans la direction d'alimentation en film (14), à partir du côté (15) du segment de cadre correspondant (8), ledit côté (15) étant opposé à la direction d'alimentation en film (14), et qui, au moins dans la partie supérieure extrême, s'étend sensiblement le long du segment de cadre correspondant (8), en suivant sensiblement la forme du segment de cadre correspondant (8) dans un plan de projection transversal à la direction d'alimentation en film (14).
  2. Dispositif selon la revendication 1, caractérisé en ce que les supports de segments de cadre (12) sont conçus sous la forme de plaques.
  3. Dispositif selon la revendication 2, caractérisé en ce que les supports de segments de cadre (12) sont réalisés en tôle ou analogue.
  4. Dispositif selon la revendication 1, caractérisé en ce que les supports de segments de cadre (12) sont réalisés à partir de barres sensiblement parallèles ou analogues, dont l'enveloppante extérieure forme un côté extérieur à deux dimensions.
  5. Dispositif selon une ou plusieurs des revendications précédentes, caractérisé en ce que le côté extérieur de chacun des supports de segments de cadre (12), ledit côté extérieur étant tourné vers le matériau en film, se rétrécit sous forme conique à partir du segment de cadre correspondant (8).
  6. Dispositif selon une ou plusieurs des revendications précédentes, caractérisé en ce que chacun des segments de cadre (8) dépasse latéralement de son support (12).
  7. Dispositif selon la revendication 6, caractérisé en ce que le dépassement (a) du contour extérieur des segments de cadre (8) par rapport à leur support correspondant (12) diminue à mesure que l'on se rapproche des parties extrêmes (10) du segment de cadre correspondant (8).
  8. Dispositif selon une ou plusieurs des revendications précédentes, caractérisé en ce que les segments de cadre (8) et/ou les surfaces des supports de segments de cadre (12) qui entrent en contact avec le film sont polis ou font l'objet d'un traitement analogue.
  9. Dispositif selon une ou plusieurs des revendications précédentes, destiné à envelopper un colis de forme cubique ou parallélépipédique, caractérisé en ce que les segments de cadre (8) sont chacun disposés de manière connue dans une zone d'angle du contour du colis correspondant.
  10. Dispositif selon une ou plusieurs des revendications précédentes, en particulier selon la revendication 9, caractérisé en ce que la zone centrale de chacun des segments de cadre (8) présente (en vue de dessus) la forme d'un arc de cercle sur un angle (α) d'environ 90°.
  11. Dispositif selon la revendication 10, caractérisé en ce que la partie sensiblement en forme d'arc de cercle est prolongée, à ses deux extrémités, par une partie (10) qui présente une courbure inférieure ou qui est coudée vers l'intérieur.
  12. Dispositif selon une ou plusieurs des revendications précédentes, en particulier selon la revendication 11, caractérisé en ce que les deux zones extrêmes (17) de chacun des supports de segments de cadre (12) sont (en vue de dessus) sensiblement tangentiel'es à la courbure du film que l'on veut tendre entre lesdits supports.
  13. Dispositif selon une ou plusieurs des revendications précédentes, en particulier selon une ou plusieurs des revendications 9 à 12, caractérisé en ce que la zone centrale (12') de chacun des supports de segments de cadre (12) est évidée.
  14. Dispositif selon la revendication 13, caractérisé en ce que les parties de bord (16, 16) tournées l'une vers l'autre sont arrondies au niveau de la partie évidée (12') de chaque support de segment de cadre (12).
  15. Dispositif selon une ou plusieurs des revendications précédentes, caractérisé en ce qu'au moins un rouleau de plissage est associé à un ou à chaque segment de cadre (8).
  16. Dispositif selon la revendication 15, caractérisé en ce que chacun des rouleaux de plissage peut être appliqué contre le segment de cadre (8) qui lui est associé ou peut en être retiré.
  17. Dispositif selon la revendication 15 ou 16, caractérisé en ce que chacun des rouleaux de plissage est disposé dans la zone supérieure d'un support de segment de cadre (12).
  18. Dispositif selon une ou plusieurs des revendications précédentes, caractérisé en ce que les segments de cadre (8) doivent être écartés de manière connue, de façon à augmenter leur distance mutuelle afin d'étirer horizontalement la housse de film (2).
  19. Dispositif selon une ou plusieurs des revendications précédentes, caractérisé en ce qu'au moins deux segments de cadre voisins (8, 8) sont reliés entre eux de manière télescopique.
  20. Dispositif selon la revendication 19, caractérisé en ce que tous les segments de cadre (8) sont reliés de manière télescopique avec leurs segments de cadre voisins (8, 8).
EP19910109317 1990-06-06 1991-06-06 Installation pour plier en accordéon et/ou étirer une gaine tubulaire d'emballage étirable Expired - Lifetime EP0460681B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9006374U 1990-06-06
DE9006374U DE9006374U1 (de) 1990-06-06 1990-06-06 Reff- und/oder Stretcheinrichtung für schlauchförmige Stretch-Umhüllungsfolie

Publications (2)

Publication Number Publication Date
EP0460681A1 EP0460681A1 (fr) 1991-12-11
EP0460681B1 true EP0460681B1 (fr) 1994-08-31

Family

ID=6854442

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910109317 Expired - Lifetime EP0460681B1 (fr) 1990-06-06 1991-06-06 Installation pour plier en accordéon et/ou étirer une gaine tubulaire d'emballage étirable

Country Status (3)

Country Link
EP (1) EP0460681B1 (fr)
DE (2) DE9006374U1 (fr)
DK (1) DK0460681T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20109692U1 (de) * 2001-06-13 2002-10-24 Beumer Maschinenfabrik Gmbh & Co. Kg, 59269 Beckum Vorrichtung zum Umhüllen von Stückgut mittels einer Stretchfolienhaube

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4037105C1 (en) * 1990-11-22 1992-03-05 Brega Verpackungsmaschinen-Anwendungstechnik Gmbh, 5884 Halver, De Stretch film packaging machine - incorporates rollers running at different speeds for stretching effect
DE9307716U1 (de) * 1993-05-21 1994-01-27 Maschinenfabrik Möllers GmbH u. Co, 59269 Beckum Vorrichtung zum Umhüllen eines Stapels
DE19612372C2 (de) * 1996-03-28 2000-09-21 Beumer Maschf Bernhard Stretcheinrichtung zum Stretchen einer Stretchfolienhaube
DE19819488A1 (de) * 1998-04-30 1999-11-04 Moellers Maschf Gmbh Vorrichtung zum Umhüllen eines Stapels
DE20205780U1 (de) 2002-04-10 2002-06-27 Dentz, Hans, 71332 Waiblingen Vorrichtung zum Verpacken von Gegenständen mittels Verpackungshüllen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2706955A1 (de) * 1977-02-18 1978-08-24 Keller Gmbh & Co Kg Einrichtung zum umhuellen von stapeln, insbesondere von ziegelstapeln
AU553073B2 (en) * 1982-04-23 1986-07-03 Technosearch Pty. Limited Stretch wrapping apparatus
DE8808508U1 (de) * 1988-06-03 1988-08-25 Bernhard Beumer Maschinenfabrik KG, 59269 Beckum Vorrichtung zum Umhüllen von Stückgut mit einer Stretchfolienhaube

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20109692U1 (de) * 2001-06-13 2002-10-24 Beumer Maschinenfabrik Gmbh & Co. Kg, 59269 Beckum Vorrichtung zum Umhüllen von Stückgut mittels einer Stretchfolienhaube

Also Published As

Publication number Publication date
DE9006374U1 (de) 1990-09-13
DE59102705D1 (de) 1994-10-06
DK0460681T3 (da) 1994-10-03
EP0460681A1 (fr) 1991-12-11

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