EP1818261B1 - Appareil pour recouvrir des groupes de produits avec un film étirable tubulaire - Google Patents

Appareil pour recouvrir des groupes de produits avec un film étirable tubulaire Download PDF

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Publication number
EP1818261B1
EP1818261B1 EP07101899A EP07101899A EP1818261B1 EP 1818261 B1 EP1818261 B1 EP 1818261B1 EP 07101899 A EP07101899 A EP 07101899A EP 07101899 A EP07101899 A EP 07101899A EP 1818261 B1 EP1818261 B1 EP 1818261B1
Authority
EP
European Patent Office
Prior art keywords
film
belt
section
roller
arm
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.)
Not-in-force
Application number
EP07101899A
Other languages
German (de)
English (en)
Other versions
EP1818261A1 (fr
Inventor
Mauro Cere'
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.)
Aetna Group SpA
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Aetna Group SpA
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Publication of EP1818261A1 publication Critical patent/EP1818261A1/fr
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Publication of EP1818261B1 publication Critical patent/EP1818261B1/fr
Not-in-force 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

  • This invention relates to apparatus for covering groups of products with tubular stretch film.
  • hood stretch machines which cover the products with a “hood”, that is to say, a tubular length of film, preferably, but not necessarily, closed at the top end to form a sleeve-like covering that is stretched over the stacked products and allowed to return to its original size, thanks to the elastic properties of the film, in such a way as to tightly hold the products together.
  • This type of covering is used, for example, to protect stacked products comprising sacks of loose building material or foods, or to wrap domestic appliances, and is applied by machinery typically consisting of:
  • the stretching unit is also equipped with drive means that move the unit down along the frame in such a way as to draw the film over the products, allowing it to gradually release the concertina folds until the film reaches the base of the products at the pallet.
  • the film is released completely so that it covers all the products and, if necessary, also the pallet.
  • the stretching unit usually consists of four substantially L-shaped arms positioned diagonally on the frame in such a way as to enable the related vertical portion to keep the corner of the film mouth open.
  • each arm may comprise:
  • the concertina folding means are applied directly to each arm (see patents US 3,902,303 and FR 2.234.509 ).
  • This unit normally consists of a power-driven wheel or similar revolving component which, when the film reaches the vertical portion of the arm, is brought into contact with the film and gathers the latter up in concertina fashion. After making the concertina folds, the wheel may be moved away from the film or it may continue to be used to guide the film downwardly along the sides of the product group.
  • the frame mounts power-driven rollers for concertina folding the film by pushing it against the second arms or into contact with an idle roller connected to the second arms.
  • the Applicant has designed and constructed an apparatus for covering groups of products with tubular stretch film equipped with an extremely functional concertina folding unit capable of overcoming the above mentioned drawback while maintaining a high level of operating flexibility and without encumbering the constructional architecture of the apparatus.
  • This invention accordingly provides an apparatus for covering groups of products with tubular stretch film, in particular, an apparatus for covering groups of products with tubular stretch film comprising the technical characteristics defined in one or more of the annexed claims.
  • product group 1 will be used, without thereby limiting the scope of the inventive concept, to denote any entity consisting of a single product or two or more stacked products to be wrapped and sealed by the tubular stretch film 2.
  • the apparatus is used for palletized product groups 1 of known type and only partly illustrated in schematic form in Figure 3 .
  • the apparatus 3 is of the type essentially comprising the following elements of particular relevance to this specification: a frame 4, a roll 5 of stretch film 2, means 8 for gripping and opening the film 2, a unit 9 for stretching the film 2 and means 13 for concertina folding or gathering up the film 2 on the stretching unit 9.
  • the frame 4 is usually of the portal type enabling the product group 1 to be positioned inside it.
  • the roll 5 of stretch film 2 is mounted outside the frame 4, is provided with film 2 having a tubular cross section with pleated sides (the pleating is not illustrated in the drawings since it is of well known type) to form an initially flattened configuration, and is controlled by film 2 feed means 6 located at the top of the frame 4 itself.
  • the gripping and opening means 8 are located inside the frame 4 and usually comprise four clamping gripper units 8a (shown in particular in Figures 1 and 3 ) acting on the mouth of the film 2 to at least give the mouth a quadrangular cross section.
  • the above mentioned unit 9 for stretching the film 2 receives the latter from the gripping means 8 in the spread open configuration and then stretches it to a size larger than the perimeter of the product group 1 (see Figure 2 ).
  • the unit 9 comprises a plurality of arms 10 - usually four, arranged in twos, one at each corner formed by two longitudinal walls of the product group 1.
  • Each arm 10 comprises a first vertical section 10a for receiving the film 2 on its surface 10b, and a second section 10c by which the arm 10 itself is linked to the frame 4.
  • Each arm 10 further comprises horizontal translational drive means 11 and vertical drive means 12 for respectively stretching the film 2 and moving the arms 10 down along the frame 4 in such a way as to cover the product group 1 (see arrows F11 and F12 in Figure 3 ).
  • the above mentioned means 13 for folding the film 2 in concertina fashion gather up a quantity of film 2 sufficient to cover the product group 1 (see Figures 2 , 3 and 4 ); the means 13 are mounted on each arm 10 and act on the film 2 before it is stretched.
  • the concertina folding means 13 comprise a power-driven concertina folding belt 14 and an idle roller 16.
  • the power-driven belt 14 for folding the film 2 in concertina fashion is associated with each arm 10 and positioned in the area at the back of the above mentioned film 2 contact surface 10b of the vertical arm section 10a.
  • At least one section 14a of the belt 14 is located at a partial opening 15 in the surface 10b to form a part thereof and in such a way as to engage and feed the film 2 towards the bottom of the contact surface 10b (as indicated by the arrow F14) in combination with the idle roller 16.
  • the above mentioned idle roller 16 is positioned to face the contact surface 10b of each arm 10 and is moved by respective drive means 17 between a retracted, idle position, where the roller 16 is away from the section 14a of the belt 14 (as shown by the dashed line in Figure 5 ), and an advanced, working position, where the roller 16 is in contact with the film 2 interposed between the roller 16 itself and the section 14a of the belt 14 (see Figure 4 and continuous line in Figure 5 ).
  • Figure 4 also shows that the belt 14 is of the endless type and is looped around two wheels 18 and 19, of which at least one, the one labelled 19, is power driven in order to drive the belt in direction F19.
  • the part of the belt 14 portion constituting the section 14a for engaging and feeding the film 2 has a predetermined active working height H such that the film 2 is moved towards the contact surface 10b even under the area where it is interposed between the belt and the idle roller 16: in practice, the film 2, which is "flung" from the point of contact between the belt 14 and the roller 16, and as it proceeds, remains in contact with the belt 14, at least partially and then comes into contact with the surface 10b of the vertical section 10 where it is gathered up uniformly.
  • At least the active portion of the belt 14 that feeds the film 2 extends, preferably but without restricting the scope of the invention, at an angle to the contact surface 10b.
  • the entire belt 14 can be inclined to the contact surface 10b at a divergent angle ⁇ , extending from the top end to the bottom end, so that the film 2 feed section 14a of the belt 14 can project partially from the opening 15.
  • the belt 14 section 14a and the roller 16 are in tangential contact with each other, that is to say, they touch at a single point.
  • each arm 10 may have an arc-shaped cross section defined by three parts 20, 21, 22 joined to each other without interruption.
  • the belt 14 is positioned behind the central part 21 where the partial opening 15 is made.
  • the belt 14 may be powered by a drive unit 23 mounted on the arm 10 and kinematically linked through a respective shaft 24 to the bottom wheel 19 of the belt 14.
  • each idle roller 16 is rotatably linked to one end of a horizontal rod 25 pivoted at the opposite end to a pin 26 that rotates about a vertical axis Z linked to each joining section 10c of the arm 10.
  • Each rod 25 is acted upon by an actuator 27 (constituting the above mentioned drive means 17), located on the joining section 10c and designed to impart to the rod 25 a rotational movement in a horizontal plane between the retracted, idle position and the advanced, working position of the roller 16.
  • An apparatus structured in this way therefore, achieves the above mentioned aims thanks to the presence of the belt behind the surface for gathering up the film on each arm.
  • the belt Thanks to its position and cooperation with the idle roller at the front, the belt starts gathering up or concertina folding the film on its moving surface at a predetermined rate and then releases it on the unmoving surface of the arm, allowing the concertina folding action to be completed by the force of the remaining film pushing down as the belt feeds it.
  • This structure permits better distribution of the concertina folds along the stretching arm, making them more compact and uniform so that the film can subsequently be drawn over the group of products and released in a precisely balanced way.
  • the belt does not touch the film because while the film is being drawn over the walls of the product group, the tension created by stretching the film tends to keep the film path clear of the projecting part of the belt, while the roller is in the retracted position.
  • the size and position of the belt do not alter the overall dimensions and configurations of the arms during their different operating movements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Basic Packing Technique (AREA)
  • Laminated Bodies (AREA)
  • Making Paper Articles (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Wrappers (AREA)

Claims (11)

  1. Un appareil pour recouvrir un ou plusieurs produits formant un groupe (1) de produits avec un film étirable tubulaire (2), tel appareil (3) étant du type comprenant au moins:
    - une bobine (5) de film étirable tubulaire (2) avec côtés repliés, asservie à des moyens (6) d'alimentation du film (2) situés au niveau de l'extrémité supérieure d'un châssis (4) ;
    - des moyens (8) destinés à saisir et à ouvrir la bouche du film (2) pour au moins conférer à la section de ladite bouche une forme polygonale ; lesdits moyens de prise comprenant une pluralité d'éléments de prise pour chaque angle du film ;
    - un groupe (9) d'étirage du film (2) qui reçoit ledit film (2) depuis les moyens de prise (8) dans la configuration ouverte et l'étire jusqu'à lui donner une dimension supérieure au périmètre du groupe (1) de produits ; le groupe (9) comprenant une pluralité de bras (10) consistant chacun en une première section verticale (10a) destinée à recevoir le film (2) sur sa surface (10b) et une deuxième section (10c) destinée à associer lesdits bras (10) au châssis (4) ; des moyens (11) de translation horizontale et des moyens (12) d'entraînement vertical agissant sur chaque bras (10) de manière, respectivement, à étirer le film (2) et à le faire descendre le long du châssis (4) afin de recouvrir le groupe (1) de produits ;
    - des moyens (13) pour plisser ou plier le film (2) en accordéon de manière à rassembler une quantité de film (2) au moins suffisante pour recouvrir le groupe (1) de produits le long de ses côtés périmétriques, lesdits moyens (13) étant montés sur chaque bras (10) et agissant sur le film (2) avant que celui-ci soit étiré, l'appareil (3) étant caractérisé en ce que les moyens (13) de pliage en accordéon comprennent au moins :
    - une bande (14) motorisée pour le pliage en accordéon du film (2), associée à chaque bras (10) et positionnée dans la zone située à l'arrière de la surface (10b) de contact du film (2) de la section verticale (10a) ; au moins une portion (14a) de la bande (14) étant située au niveau d'une ouverture partielle (15) de la surface (10b), pour en former une partie, afin d'assujettir et d'alimenter le film (2) vers la partie inférieure de la surface de contact (10b) en association avec
    - un rouleau fou (16), positionné face à la surface de contact (10b), associé à chaque bras (10) et mû par des moyens (17) respectifs entre une position rentrée de repos, dans laquelle le rouleau (16) est éloigné de la portion (14a) de la bande (14), et une position sortie opérationnelle, dans laquelle le rouleau (16) est en contact avec le film (2) interposé entre le rouleau (16) lui-même et la portion (14a) de la bande (14).
  2. L'appareil selon la revendication 1, caractérisé en ce que la bande (14) est du type sans fin et est enroulée en boucle autour de deux roues (18, 19) dont au moins la roue (19) est motorisée.
  3. L'appareil selon la revendication 1, caractérisé en ce que la bande (14) est du type sans fin et est enroulée en boucle autour de deux roues (18, 19) dont au moins la roue (19) est motorisée ; une partie de la portion de bande (14) s'étendant au niveau de l'extrémité supérieure de la bande (14) elle-même constituant ladite portion (14a) d'assujettissement et d'alimentation du film (2).
  4. L'appareil selon la revendication 3, caractérisé en ce que la partie de la portion de bande (14) qui constitue la portion (14a) d'assujettissement et d'alimentation du film (2) a une hauteur de travail utile (H) prédéfinie de manière à ce que le film (2) soit mû vers la surface de contact (10b) même au-dessous de la zone où il est interposé entre la bande et le rouleau fou (16).
  5. L'appareil selon les revendications de 1 à 4, caractérisé en ce qu'au moins la portion active de la bande (14) qui alimente le film (2) s'étend de biais par rapport à la surface de contact (10b).
  6. L'appareil selon les revendications de 1 à 4, caractérisé en ce que la bande (14) est inclinée par rapport à la surface de contact (10b) selon un angle divergent (α), s'étendant de l'extrémité supérieure à l'extrémité inférieure, de manière à ce que la portion (14a) de la bande (14) d'alimentation du film (2) dépasse partiellement de l'ouverture (15).
  7. L'appareil selon la revendication 1, caractérisé en ce qu'au niveau de la position sortie opérationnelle du rouleau (16), la portion (14a) de la bande (14) et le rouleau (16) lui-même sont en contact tangentiel réciproque, c'est-à-dire qu'ils se touchent en un seul point.
  8. L'appareil selon les revendications de 1 à 4, caractérisé en ce que le rouleau (16), dans la position sortie opérationnelle, est en contact tangentiel avec, c'est-à-dire qu'il touche en un seul point, la portion (14a) de la bande (14) située au niveau de la roue supérieure (18) de ladite bande (14).
  9. L'appareil selon la revendication 1, où la section verticale (10a) de chaque bras (10) présente une section arquée définie par trois parties (20, 21, 22) raccordées entre elles sans interruption, l'appareil étant caractérisé en ce que la bande (14) est positionnée derrière la partie centrale (21) où est réalisée l'ouverture partielle (15).
  10. L'appareil selon les revendications de 1 à 4, caractérisé en ce que la bande (14) est motorisée par un groupe d'entraînement (23) monté sur le bras (10) et cinématiquement relié, par l'intermédiaire d'un arbre (24) respectif, à la roue inférieure (19) de la bande (14).
  11. L'appareil selon la revendication 1, caractérisé en ce que chaque rouleau fou (16) est associé de façon rotative à une extrémité d'une tige horizontale (25) montée de façon pivotante, au niveau de son extrémité opposée, sur un pivot (26) qui tourne autour d'un axe vertical (Z) associé à chaque section de jonction (10c) du bras (10) ; un actionneur (27) agissant sur chaque tige (25), tel actionneur (27) étant situé sur la section de jonction (10c) et étant destiné à imprimer à ladite tige (25) un mouvement de rotation, dans un plan horizontal, entre la position rentrée de repos et la position sortie opérationnelle du rouleau (16).
EP07101899A 2006-02-10 2007-02-07 Appareil pour recouvrir des groupes de produits avec un film étirable tubulaire Not-in-force EP1818261B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000096A ITBO20060096A1 (it) 2006-02-10 2006-02-10 Apparecchiatura per la copertura di gruppi di prodotti con film tubolare estensibile

Publications (2)

Publication Number Publication Date
EP1818261A1 EP1818261A1 (fr) 2007-08-15
EP1818261B1 true EP1818261B1 (fr) 2009-06-10

Family

ID=37946331

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07101899A Not-in-force EP1818261B1 (fr) 2006-02-10 2007-02-07 Appareil pour recouvrir des groupes de produits avec un film étirable tubulaire

Country Status (4)

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EP (1) EP1818261B1 (fr)
AT (1) ATE433414T1 (fr)
DE (1) DE602007001247D1 (fr)
IT (1) ITBO20060096A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES1077857Y (es) * 2012-09-28 2013-01-18 Innova Maqu Cerámica S L (100 0%) Máquina para revestir cargas paletizadas
ITMO20130096A1 (it) * 2013-04-15 2014-10-16 Bocedi S R L Off Macchina per il confezionamento di pallet
DK178374B1 (en) 2014-11-04 2016-01-18 Frank Bruhn Aps HORIZONTALLY ARRANGED WRAP PACKAGING SYSTEM
CN106314889B (zh) * 2016-10-25 2019-07-12 安徽永锋智能包装科技有限公司 一种用于智能套袋设备的张袋装置
NL2017863B1 (nl) * 2016-11-24 2018-06-01 F3 Design B V Verpakkingmachine voor het aanbrengen van een folie om een te verpakken voorwerp

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4063401A (en) * 1974-09-24 1977-12-20 Higgins David M Bagging machine
DE9001321U1 (de) * 1990-02-06 1990-04-12 Develog, Reiner Hannen & Cie, Corgémont Vorrichtung zum Überziehen von Strechfolienhauben über einen Gutstapel
DE19732298C1 (de) * 1997-07-26 1999-02-04 Moellers Maschf Gmbh Vorrichtung und Verfahren zum Umhüllen eines Stapels
EP1266828B1 (fr) * 2001-06-13 2005-05-04 Beumer Maschinenfabrik GmbH & Co. KG Procédé et appareil pour envelopper des piles de marchandises avec une housse ou un manchon de film étirable
ITBO20040174A1 (it) * 2004-03-26 2004-06-26 Aetna Group Spa Apparecchiatura per la copertura di gruppi di prodotti con film tubolare estensibile

Also Published As

Publication number Publication date
DE602007001247D1 (de) 2009-07-23
EP1818261A1 (fr) 2007-08-15
ITBO20060096A1 (it) 2007-08-11
ATE433414T1 (de) 2009-06-15

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