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WO2025074248A1 - Éléments de préhension pour manipuler un film étirable pour emballer un produit - Google Patents

Éléments de préhension pour manipuler un film étirable pour emballer un produit Download PDF

Info

Publication number
WO2025074248A1
WO2025074248A1 PCT/IB2024/059603 IB2024059603W WO2025074248A1 WO 2025074248 A1 WO2025074248 A1 WO 2025074248A1 IB 2024059603 W IB2024059603 W IB 2024059603W WO 2025074248 A1 WO2025074248 A1 WO 2025074248A1
Authority
WO
WIPO (PCT)
Prior art keywords
chamber
holes
group
gripping
film
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.)
Pending
Application number
PCT/IB2024/059603
Other languages
English (en)
Inventor
Angelo Cappi
Georgi Dimitrov Todorov
Stefano TRENTI
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.)
High Tech Green Lab Srl
Original Assignee
High Tech Green Lab Srl
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 High Tech Green Lab Srl filed Critical High Tech Green Lab Srl
Publication of WO2025074248A1 publication Critical patent/WO2025074248A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B65B41/00—Supplying or feeding container-forming sheets or wrapping material
    • B65B41/12—Feeding webs from rolls
    • B65B41/14—Feeding webs from rolls by grippers
    • 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
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • 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
    • B65B67/00—Apparatus or devices facilitating manual packaging operations; Sack holders
    • B65B67/08—Wrapping of articles

Definitions

  • Systems of gripping elements for handling a stretchable film comprise: a first gripping element and a second gripping element that are devised to grasp the film, unwind the film from a reel and wrap the film around a product to be packaged; a third gripping element and a fourth gripping element that are devised to grasp the opposite longitudinal edges of the film, tension the film in a direction substantially perpendicular to said opposite longitudinal edges and wrap the film around the product to be packaged.
  • the gripping elements have the shape of pincers comprising a fixed jaw and a movable jaw, between which the film can be clamped.
  • the jaws are normally covered with a slip-proof material, for example rubber, or synthetic rubber, which is used to ensure the grip on the film.
  • a slip-proof material for example rubber, or synthetic rubber, which is used to ensure the grip on the film.
  • the slip-proof material with which the jaws of the pincers are covered must have sufficiently great friction to retain the film but at the same time the friction cannot be excessive because it can create problems during the step of releasing the film, making this operation uncontrollable.
  • the interaction between the slip-proof material and the film can change according to the features of the film, which can be more or less slippery, more or less thick, but can also change because of environmental conditions like temperature and humidity, which alter the physical properties of the film and of the slip-proof material; in extreme cases of low temperatures the need to preheat the film before use also arises.
  • slip-proof material is subject to wear, which constitutes a further problem in the constancy of operation of the system and requires periodic replacement interventions, with resulting loss of time and money.
  • the pincers require precise tolerances in the mechanical parts in order to operate correctly, but these precise tolerances generate complications first in the assembly step and then in the maintenance step.
  • One object of this invention is to simplify the systems of gripping elements for handling a stretchable film by making the systems simpler and less expensive to implement, ensuring a secure grip on the stretchable film in all steps of handling the film and in all conditions.
  • a further object of this invention is to improve the durability of the gripping elements.
  • the structure of the gripping elements is significantly simplified, because the gripping elements do not have moving parts for gripping the film.
  • Figure 2 is a perspective view of a first gripping element according to the invention.
  • Figure 3 is an exploded perspective view of the first gripping element of Figure 2;
  • Figure 4 is a perspective view of a second gripping element according to the invention;
  • Figure 5 is an exploded perspective view of the second gripping element of Figure 4;
  • Figure 6 is a perspective view of a third gripping element according to the invention;
  • Figure 7 is an exploded perspective view of the third gripping element of Figure 6;
  • Figure 8 is a perspective view of is a perspective view of a fourth gripping element according to the invention.
  • Figure 9 is an exploded perspective view of the fourth gripping element of Figure 8.
  • Figure 10 is a perspective view of a version of a gripping element according to the invention
  • Figure 11 is a perspective view of a further version of a gripping element according to the invention
  • Figure 12 is a view like that of Figure 11, in which a part of the gripping element has been removed.
  • Figure 1 shows a schematic perspective view of a system 1 of gripping elements according to the invention, for handling a film 2 of stretchable material, for example stretchable plastics.
  • the system 1 comprises:
  • a first gripping element 3 arranged transversely to the film 2, whose function is to retain the film 2 before the start of a step of wrapping a product, to enable the film to pass whilst being unwound from a reel (not visible in the figures), to cooperate with wrapping the film around the product to be packaged and possibly cut the film, at the end of the step of wrapping the product;
  • a second gripping element 4 which is also arranged transversely to the film 2, the function of which is to unwind a set quantity of film 2 from the reel, in the direction indicated by the arrow F in figure 1, by grasping a free end of the film 7, initially retained by the first gripping element 3, and cooperating with the first gripping element 3 to wrap the film around a product to be packaged;
  • the first gripping element 3 comprises a body 10 that has a plurality of protrusions 11, having a substantially rectangular plan shape, spaced apart by spaces 12.
  • the body 10 consists of a first part 10a and a second part 10b having corresponding shapes.
  • the first part 10a and the second part 10b are provided with respective protrusions I la and 1 lb that mate with one another to form the protrusions 11 of the body 10, when the first part 10a and the second part 10b of the body 10 are joined together.
  • a chamber 27 is defined inside the body 10, when the first part 10a and the second part 10b are joined together.
  • Each protrusion 11b of the second part 10b of the body 10 is provided with a plurality of holes 13, which place the chamber 27 in communication with the exterior.
  • the chamber 27 communicates with a first connecting element 14, by means of which the chamber 27 can be connected to a sucking device suitable for creating a vacuum in the chamber 27.
  • the first gripping element 3 further comprises a plate 15, which is so connected to the body 10 that between the body 10 and the plate 15 a slit 16 remains through which the film 2 can pass.
  • the holes 13 are arranged in parallel rows that are staggered in relation to one another.
  • the diameter of the holes 13 is comprised between 1 mm and 5 mm, so as to ensure a secure grip on the film 2, in particular during the step of wrapping the film 2 around the product, and so as to make the release of the film 2 easy and not to generate unappealing wrinkles on the surface of the film.
  • the knife element 17 is used to cut the film 2, at the end of the step of wrapping a product, to separate the portion of film 2 wrapped around the product from the rest of the film 2.
  • the second gripping element 4 is illustrated in a perspective view ( Figure 4) and in an exploded perspective view ( Figure 5).
  • the second gripping element 4 comprises a body 20 that has a plurality of protrusions 21, having a substantially rectangular plan shape, spaced apart by spaces 22.
  • the spaces 22 are so positioned and sized that the protrusions 11 of the body 10 of the first gripping element 3 can be inserted into the spaces 22.
  • a first chamber 28 is defined inside the body 20, when the first part 20a and the second part 20b are joined together.
  • Each protrusion 21b of the second part 20b of the body 12 is provided with a plurality of holes 23, that place the first chamber 28 in communication with the exterior.
  • the first chamber 28 can be placed in communication with a second connecting element 24, by means of which the first chamber 28 can be connected to a sucking device suitable for creating a vacuum in the first chamber 28.
  • the first gripping element 3 further comprises a plate 25, to which a perforated element 26 is fitted and that can be connected to the second part 20b of the body 20.
  • the second chamber 28a can also be placed in communication, independently of the first chamber 28, with the second connecting element 24, by which the second chamber 28a can be connected to a sucking device suitable for creating a vacuum in the second chamber 28a.
  • the holes 23 are arranged in parallel rows that are staggered in relation to one another.
  • the diameter of the holes 23 is comprised between 1 mm and 5 mm, so as to ensure a secure grip on the film 2, in particular during the step of unwinding the film 2 from the reel and of wrapping the film 2 around the product, and so as to make the release of the film 2 easy and not to generate unappealing wrinkles on the surface of the film.
  • Creating a vacuum in the second chamber 28a is designed to enable the second gripping element 4 to lock in position a tray containing a product to be wrapped, which has been brought into contact with the perforated element 26, whereas the third gripping element 5 and the fourth gripping element 6 take the opposite longitudinal edges 8 and 9 of the film 2 below the tray, in a step of completing wrapping the product.
  • the third gripping element 5 comprises a body 29 on a face 30 of which a first group of holes 31 is present that is flanked by a second group of holes 32 and by a third group of holes 33 that are placed on sides opposite the first group of holes 31.
  • the body 29 consists of a first part 29a and a second part 29b having corresponding shapes.
  • the first part 29a comprises the first group of holes 31, the second group of holes 32 and the third group of holes 33.
  • the second part 29b comprises a first chamber 34 flanked by a second chamber 35 and by a third chamber 36 placed on sides opposite the first chamber 34.
  • the first group of holes 31 is at the first chamber 34 and places the first chamber 34 in communication with the exterior;
  • the second group of holes 32 is at the second chamber 35 and places the second chamber 35 in communication with the exterior;
  • the third group of holes 33 is at the third chamber 36 and places the third chamber 36 in communication with the exterior.
  • the first chamber 34 communicates, via a first conduit 37, with a third connecting element 38.
  • the second chamber 35 communicates, via a second conduit 39, with the third connecting element 38 and the third chamber 36 communicates, via a third conduit 40, with the third connecting element 38.
  • the third connecting element 38 can be connected to a sucking device suitable for creating a vacuum in the first chamber 34, in the second chamber 35 and in the third chamber 36.
  • connections between the first chamber 34, the second chamber 35, the third chamber 36 and the third connecting element 38 can be opened or closed independently of one another, by respective valve elements, which are not shown, placed at the coupling of the first conduit 37, of the second conduit 39 and of the third conduit 40, in the third connecting element 38.
  • the vacuum is created only in the first chamber 34, or also in the second chamber 35 and in the third chamber 36.
  • the holes 31, 32, 33 are arranged in parallel rows that are staggered in relation to one another.
  • the diameter of the holes 31, 32, 33 is comprised between 1 mm and 5 mm, so as to ensure a secure grip on the film 2, in particular during the step of tensioning the film 2 and of wrapping the film 2 around the product, and so as to make the release of the film 2 easy and not to generate unappealing wrinkles on the surface of the film.
  • the fourth gripping element 6 comprises a body 41 on a face 42 of which a first group of holes 43 is present that is flanked by a second group of holes 44 and by a third group of holes 45 that are placed on sides opposite the first group of holes 43.
  • the body 41 consists of a first part 41a and a second part 41b having corresponding shapes.
  • the first part 41a comprises the first group of holes 43, the second group of holes
  • the second part 41b comprises a first chamber 46 flanked by a second chamber 47 and by a third chamber 48 placed on sides opposite the first chamber 34.
  • the first group of holes 43 is at the first chamber 46 and places the first chamber 46 in communication with the exterior;
  • the second group of holes 44 is at the second chamber 47 and places the second chamber 47 in communication with the exterior;
  • the third group of holes 45 is at the third chamber 48 and places the third chamber 48 in communication with the exterior.
  • the first chamber 46 communicates, via a first conduit 49, with a fourth connecting element 50.
  • the second chamber 47 communicates, via a second conduit 51, with the fourth connecting element 50 and the third chamber 48 communicates, via a third conduit 52, with the fourth connecting element 50.
  • the fourth connecting element 50 can be connected to a sucking device suitable for creating a vacuum in the first chamber 46, in the second chamber 47 and in the third chamber 48.
  • connections between the first chamber 46, the second chamber 47 and the third chamber 48 and the fourth connecting element 50 can be opened or closed independently of one another, by respective valve elements, which are not shown, placed at the coupling of the first conduit 49, of the second conduit 51 and of the third conduit 52, in the fourth connecting element 50.
  • the vacuum is created only in the first chamber 46, or also in the second chamber 47 and in the third chamber 48.
  • the holes 43, 44, 45 are arranged in parallel rows that are staggered in relation to one another.
  • the diameter of the holes 43, 44, 45 is comprised between 1 mm and 5 mm, so as to ensure a secure grip on the film 2, in particular during the step of tensioning the film 2 and of wrapping the film 2 around the product, and so as to make the release of the film 2 easy and not to generate unappealing wrinkles on the surface of the film.
  • the gripping element 53 comprises a tubular element 54, closed at both ends and fixed to a support plate 55.
  • the tubular element 54 is provided with a plurality of holes 56, distributed substantially evenly over most of the length thereof.
  • the interior of the tubular element 54 communicates with a fifth connecting element 57, by means of which the interior of the tubular element 54 can be connected to a sucking device suitable for creating a vacuum inside the tubular element 54.
  • a sucking device suitable for creating a vacuum inside the tubular element 54.
  • the gripping element 58 comprises a tubular element 59, closed at both ends, fixed to a U-shaped support element 60.
  • the tubular element 59 comprises a central section 61, provided with a first group of holes 62, flanked, on opposite sides, by a first lateral section 63, provided with a second group of holes 64, and by a second lateral section 65, provided with a third group of holes 66.
  • the interior of the central section 61 does not communicate with the interior of the first lateral section 63 and of the second lateral section 65.
  • the interior of the central section 61 can be connected, by a sixth connecting element 67, to a sucking device.
  • a first window 71 is made, that, when the tubular element 59 is fixed to the support element 60, is at the first group of holes 62.
  • a second window 72 and a third window 73 are further made, that, when the tubular element 59 is fixed to the support element 60, are at the second group of holes 64 and the third group of holes 66, respectively.
  • connection between the interior of said central section 61, the interior of said first lateral section 63 and the interior of said second lateral section 65 can be opened or closed independently of one another.
  • the vacuum is created only in the central section 61 of the tubular element 59, or also in the first lateral section 63 and in the second lateral section 65 of the tubular element 59.
  • the holes 62, 64, 66 are arranged in parallel rows that are staggered in relation to one another.
  • the diameter of the holes 62, 64, 66 is comprised between 1 mm and 5 mm, so as to ensure a secure grip on the film 2, and so as to make the release of the film 2 easy and not to generate unappealing wrinkles on the surface of the film.
  • the gripping element 53 and/or the gripping element 58 can be used instead of the first gripping element 3, of the second gripping element 4, of the third gripping element 5 and of the fourth gripping element 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Manipulator (AREA)

Abstract

L'invention concerne un système d'éléments de préhension (1) pour manipuler un film étirable (2) comprenant un premier élément de préhension (3), disposé transversalement audit film (2), un deuxième élément de préhension (4), disposé transversalement audit film (2), un troisième élément de préhension (5) et un quatrième élément de préhension (6) disposés parallèlement à des bords longitudinaux opposés respectifs (8, 9) du film (2), chaque élément de préhension (3 ; 4 ; 5 ; 6) comprenant un corps (1 ; 20 ; 29 ; 41) à l'intérieur duquel est définie au moins une chambre (27 ; 28, 28a ; 34, 35, 36) communiquant avec l'environnement à l'extérieur du système (1) par l'intermédiaire d'une pluralité de trous (13 ; 23 ; 26 ; 31, 32, 33) ; ladite au moins une chambre étant reliée à un élément de liaison (14 ; 24 ; 38 ; 50) par lequel ladite au moins une chambre (27 ; 28, 28a ; 34, 35, 36) peut être reliée à un dispositif d'aspiration, les trous (13 ; 23 ; 26 ; 31, 32, 33 ; 43, 44, 45 ; 56 ; 62, 64, 66) de ladite pluralité de trous ayant un diamètre compris entre 1 mm et 5 mm.
PCT/IB2024/059603 2023-10-03 2024-10-01 Éléments de préhension pour manipuler un film étirable pour emballer un produit Pending WO2025074248A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102023000020394 2023-10-03
IT102023000020394A IT202300020394A1 (it) 2023-10-03 2023-10-03 Sistema di elementi di presa per manipolare un film estensibile per il confezionamento di un prodotto

Publications (1)

Publication Number Publication Date
WO2025074248A1 true WO2025074248A1 (fr) 2025-04-10

Family

ID=89158355

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2024/059603 Pending WO2025074248A1 (fr) 2023-10-03 2024-10-01 Éléments de préhension pour manipuler un film étirable pour emballer un produit

Country Status (2)

Country Link
IT (1) IT202300020394A1 (fr)
WO (1) WO2025074248A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4548024A (en) * 1981-03-19 1985-10-22 Weldotron Corporation Integrated stretch-wrap packaging system
EP0648674A1 (fr) * 1993-10-19 1995-04-19 A.W.A.X. PROGETTAZIONE E RICERCA S.r.l. Procédé et dispositif pour envelopper des produits avec une feuille extensible
US6360801B1 (en) * 1996-10-17 2002-03-26 Daimlerchrysler Ag Method and apparatus for applying self-adhesive protective sheeting to vehicle bodies

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016020810A1 (fr) 2014-08-07 2016-02-11 Anigma Consulting Appareil pour emballer un produit à l'aide d'un film extensible

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4548024A (en) * 1981-03-19 1985-10-22 Weldotron Corporation Integrated stretch-wrap packaging system
US4548024B1 (fr) * 1981-03-19 1988-03-29
EP0648674A1 (fr) * 1993-10-19 1995-04-19 A.W.A.X. PROGETTAZIONE E RICERCA S.r.l. Procédé et dispositif pour envelopper des produits avec une feuille extensible
US6360801B1 (en) * 1996-10-17 2002-03-26 Daimlerchrysler Ag Method and apparatus for applying self-adhesive protective sheeting to vehicle bodies

Also Published As

Publication number Publication date
IT202300020394A1 (it) 2025-04-03

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