EP1332968B1 - Machine d'emballage avec des bobines opposées et procédé d'emballage correspondant - Google Patents

Machine d'emballage avec des bobines opposées et procédé d'emballage correspondant Download PDF

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Publication number
EP1332968B1
EP1332968B1 EP03100123A EP03100123A EP1332968B1 EP 1332968 B1 EP1332968 B1 EP 1332968B1 EP 03100123 A EP03100123 A EP 03100123A EP 03100123 A EP03100123 A EP 03100123A EP 1332968 B1 EP1332968 B1 EP 1332968B1
Authority
EP
European Patent Office
Prior art keywords
film
wrapping
load
dispensing units
machine
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
EP03100123A
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German (de)
English (en)
Other versions
EP1332968A2 (fr
EP1332968A1 (fr
Inventor
Franco Tacchini
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.)
Officina Meccanica Sestese SpA
Original Assignee
Officina Meccanica Sestese SpA
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Publication date
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Publication of EP1332968A2 publication Critical patent/EP1332968A2/fr
Publication of EP1332968A1 publication Critical patent/EP1332968A1/fr
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Publication of EP1332968B1 publication Critical patent/EP1332968B1/fr
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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
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/58—Applying two or more wrappers, e.g. in succession
    • B65B11/585—Applying two or more wrappers, e.g. in succession to stacked articles, e.g. pallettised 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
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/02—Wrapping articles or quantities of material, without changing their position during the wrapping operation, e.g. in moulds with hinged folders
    • B65B11/025—Wrapping articles or quantities of material, without changing their position during the wrapping operation, e.g. in moulds with hinged folders by webs revolving around stationary articles

Definitions

  • the present invention relates to a wrapping machine and the respective wrapping method, in particular a wrapping machine provided with two opposite bobbins.
  • wrapping machines are machines apt to wrap a load in a plastic film, usually a stretchable film.
  • the wrapping of the load occurs by setting a rotational-translational relative movement between a stretchable film bobbin and said load: usually this may occur by either keeping the load fixed and moving the bobbin around it or combining the rotation of the load with the translation of the bobbin parallel to the rotation axis of said load.
  • the gripping device is highly complex and expensive, both to manufacture and to maintain.
  • the gripping device in order to intervene on the film adhering to the lateral side of the load, the gripping device must be moved from a side position to a position wherein it intercepts the area near the load, resulting in safety problems for its users.
  • WO00/53497 discloses a a film wrapping apparatus in accordance with the preamble of claim 1 and comprising two or more wrapping heads. Film is independently drawn from each head and attached to a point of a load by respective gripper units, then wrapped around said load. The film is dispensed at a high rate per turn, but a plurality of grippers is still required.
  • a joining device according to claim 5 and a load wrapping method according to claim 7 are provided.
  • fig. 1 is a plan view of an embodiment of the invention.
  • fig. 2 is a front elevation view of the embodiment of fig. 1, wherein the dispensing units are raised;
  • fig. 2A is a sectional view taken along line II-II of fig. 1;
  • fig. 3 is a view similar to that of fig. 2, with the wrapping machine in operation;
  • fig. 4 is a longitudinal sectional view of a preferred embodiment of the joining device according to the invention.
  • fig. 5 is a sectional view taken along line V-V of fig. 4;
  • figs. 6A and 6B are plan and side elevation views, respectively, of the cutting cup mounted on the device of fig. 4;
  • figs. 7-18 marked with A are partial longitudinal sectional views of the device of fig. 4 during the different knotting steps.
  • figs. 7-18 marked with B are partial bottom views of the device of fig. 4 during the different knotting steps.
  • an exemplary wrapping machine is illustrated. It comprises two vertical supporting columns 1a and 1b, onto which an annular structure 2 is translatably mounted, which is designed to support and guide stretchable film dispensing units during rotation. An annular track located on the structure is placed so as to encircle a load C to be wrapped.
  • two dispensing units are mounted facing each other, a stretchable film P continuously extending between one unit 3a to the other unit 3b (as can be seen in fig. 2).
  • the dispensing units are made, in a per se known manner, of a shelf rotatively supporting a stretchable film bobbin B and a plurality of cooperating cylinders of a pre-stretching unit.
  • the film P extends between one unit and the other along the diameter of the annular structure, it is possible to engage it with the top portion of the load C without using a gripping device for handling a free end of the film.
  • the operation of the machine according to the invention provides that the load C be moved to a position corresponding to the rotation axis a-a' when the annular structure 2 is in its completely raised position.
  • the film P extending along the diameter of the ring 2, does not intercept the load C: it is therefore possible to provide that the two dispensing units 3a and 3b be already rotating.
  • the annular structure 2 is lowered until the film engages the top portion of the load C: the film P is then naturally gripped and held by the upper edges of the load C, causing the actual wrapping to start.
  • the machine since the bobbins face each other, the machine has balanced masses, thus resulting in less stress, and may be supported by a lighter structure.
  • a joining device 4 placed above the load is provided.
  • the joining device 4 may avoid using complicated feelers or other film locating and gripping elements.
  • the joining device 4 is mounted, at the rotational axis a-a', onto a frame 5 placed above the annular structure 2.
  • the frame is translatably mounted onto columns 1a and 1b (fig. 2A).
  • the ring 2 and the frame 5 may be both mounted on respective supporting shelves engaged with a common fixed chain 6 (only a portion of which is shown in fig. 2A).
  • a suitable ratchet 7 prevents the relative movement between the frame 5 and the chain 6, so as to keep the joining device 4 in position in spite of possible lowerings of the ring 2.
  • the joining device 4 must be apt to join the two film ends coming from the load, once the wrapping is over, separate them from the respective bobbins and rejoin the free ends of the two bobbins in order to restore the initial conditions.
  • This operation may be done with different techniques, for example by welding, gripping, stapling, gluing, etc.
  • a preferred embodiment of the joining device will be illustrated, with reference to figs. 4-18B.
  • a preferred joining device is illustrated in detail. It is made of a housing and supporting structure 10, wherein there are a main gripping element 11 and a pair of secondary grippers 12a and 12b, which are placed opposite relative to the main gripping element 11.
  • the housing structure has a protective casing 10a at its lower end, from which several gripping elements may project.
  • the secondary grippers 12a and 12b are mounted onto fifth wheel means 13 allowing the concentrical rotation thereof relative to the main gripping element 11.
  • the fifth wheel means 13 are made to rotate, for rotation angles of ⁇ 180°, by means of a driving element 14 and a drive chain 14a (fig. 5).
  • the secondary grippers are made of gripping pins 15a and 15b that are translatable, through actuators 16a and 16b, within small hollow cylinders 17a and 17b.
  • the main gripping element 11 is made of a main gripping pin 18 that may slide, through an actuator A1, within a hollow pin or cylinder 19 which, integrally with the actuator A1, may in turn slide within a liner 20 by means of a second actuator A2.
  • a cutting cup 21 is further integrally connected to the liner structure 20, in a concentrical position relative to the main gripping element 11. Said cutting cup 21 is well illustrated in figs. 6A and 6B: it is made of protective cylindrical walls 21a, interrupted by windows onto which cutting blades 21b are mounted at opposite facing edges.
  • the joining device is moved close to the top of the load C; initially, the secondary gripping pins 15a and 15b are inwardly withdrawn (i.e. not projecting from the lower profile of the casing 10a), while the main gripping element 11 is in its completely extracted position.
  • the two bobbins while rotating and vertically rising, also apply some turns (2 or 3) of stretchable film onto the external surface of the cylinder 19, then further rise upwards before being stopped.
  • this condition which is illustrated in fig. 7A, two portions of film come upwardly from the load C, wrap the cylinder 19 in a plurality of turns and then move upwards in the direction of the respective bobbins B.
  • the cylinder 19 is raised until the film turns are abutting against the mouth of the liner 20.
  • the gripping pin 18 is then lowered, which pin is provided with a gripping flange 18a, and then the bobbins are made again to rotate around the axis a-a' in order to apply at least a further turn of film below the previous ones (fig. 8A).
  • the gripping pins 15a and 15b are closed and, during this clamping operation, they drag and block the film P. Since the gripping plane of the pins15a and 15b is placed at a higher level than the lower profile of the casing 10a and of the cup 21, the film P, stretched into a cord, is moved inside the windows of the cup 21 (see figs. 10A and 10B). At the same time, also the central gripping pin 18 clamps the last turn of film P applied against the edge of the cylinder 19.
  • the two portions of film extending between the central pin and the two secondary pins intercept the two cutting blades 21b, getting cut (fig. 12B): in this cutting step, the film coming from the wrapped up load C (whose ends remain hanging from the central gripping pin) is separated from the two film portions coming from the two bobbins (which remain gripped and held by the two secondary pins).
  • the two secondary pins have completed a rotation of about 180° in the direction of the arrow G.
  • the main pin 18 and cylinder 19 are lowered again (fig. 14A) in order to apply some new turns (2 or 3) of stretchable film through a further rotation of the two bobbins.
  • the step described with reference to figs. 9 and 10 is again performed, i.e. the cylinder 19 rises until pushing the layers against the edge of the liner 20, while the pin 18 is lowered by a small section.
  • a portion of the film held by the secondary grippers is wrapped on this latter section of the pin, forming at least one half-turn: this is obtained by means of an inverted rotation of about 180° (in the direction of he arrow G') of the two gripping pins 15a and 15b (fig. 15B).
  • the gripping pin 18 is then lifted and the last half-turn is gripped between the flange 18a and the mouth of the cylinder 19.
  • the film ends that are still held by the secondary pins may be freed (fig. 16B) and the actuator A2 is again operated in order to perform a knot - identical to the previously described one - also between these latter turns (figs. 17A and 17B): this way, the continuity of the film extending between the opposite bobbins is restored (fig. 18B), so that the initial conditions are reestablished in order to perform a new wrapping cycle.
  • the central position of the joining device allows it to be incorporated into another equipment useful for the wrapping, for example a so-called "small press” for unstable loads.
  • the specific joining device illustrated in the preferred embodiment advantageously allows to join the film ends by knotting them: this technique is much more reliable and less unstable than the traditional welding technique, thus resulting in a further advantage.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)

Claims (10)

  1. Machine d'emballage du type comprenant au moins une paire d'unités de distribution de film étirable opposées (3a, 3b), installées pour effectuer un mouvement de translation et de rotation autour d'une charge (C) devant être emballée, le film étirable provenant de la première unité qui est relié à celui de la seconde unité au moins durant une étape d'emballage, caractérisée en ce qu'elle comprend en outre un dispositif de réunion (4) pouvant intercepter, au niveau de l'axe de rotation, les parties du film s'étendant entre la charge (C) et les unités de distribution de film opposées (3a, 3b) pour les séparer et rétablir la continuité des parties du film s'étendant entre les unités opposées et celle des parties du film provenant de la charge emballée.
  2. Machine selon la revendication 1, dans laquelle ledit dispositif de réunion (4) peut couper lesdites parties de film et nouer les extrémités libres de celles-ci.
  3. Machine selon les revendications 1 ou 2, dans laquelle lesdites unités de distribution (3a, 3b) comprennent au moins une bobine de film de matière plastique étirable (B) et une unité de pré-étirage, qui sont montées pour tourner sur une structure de chemin de roulement annulaire (2), en pouvant effectuer un mouvement de translation par rapport à la charge (C) le long de l'axe de rotation.
  4. Machine selon la revendication 3, dans laquelle ledit dispositif de réunion est monté sur un châssis pouvant effectuer un mouvement de translation vertical (5), pouvant porter au-dessus de la structure de chemin de roulement annulaire (2), mais pouvant se détacher de celle-ci et se bloquer le long de la direction verticale.
  5. Dispositif de réunion destiné à intercepter et réunir les parties de film plastique s'étendant entre deux bobines opposées dans une machine d'emballage selon la revendication 1, comprenant
       un élément de saisie central principal (11), constitué d'une broche de saisie (18) pouvant coulisser à l'intérieur d'un cylindre creux (19) qui à son tour peut coulisser à l'intérieur d'une chemise (20), et
       une paire de pinces secondaires (12a, 12b) placées à l'opposé l'une de l'autre par rapport à l'élément de saisie principal (11) et pouvant pivoter en totalité autour de l'axe de coulissement longitudinal dudit élément de saisie principal (11) afin d'exécuter une séquence de nouage sur ladite partie de film plastique.
  6. Dispositif de réunion selon la revendication 5, comprenant en outre des moyens de lames (21b) disposés entre ledit élément de saisie principal (11) et lesdites pinces secondaires (12a, 12b) et pouvant intercepter et couper ledit film en une étape spécifique de ladite séquence de nouage.
  7. Procédé d'emballage d'une charge, où au moins une paire d'unités de distribution de film étirable opposées (3a, 3b) est amenée à tourner et à effectuer un mouvement de translation autour de la charge (C), de manière à obtenir une série de tours d'emballage du film, caractérisé en ce que le film provenant de la première unité est lié au film provenant de la seconde unité au moins avant et pendant l'opération d'emballage de la charge, puis est séparé après l'opération d'emballage et réuni avant le début de l'opération d'emballage suivante.
  8. Procédé d'emballage selon la revendication 7, dans lequel la paire d'unités de distribution (3a, 3b) est amenée à tourner avant le début de l'opération d'emballage, dans une position telle que l'ensemble des deux unités et du film s'étendant entre celles-ci n'interfère pas avec la charge lorsque la charge est introduite dans la machine d'emballage au niveau de l'axe de rotation de ladite paire d'unités de distribution.
  9. Procédé d'emballage selon les revendications 7 ou 8, dans lequel, à la fin de l'opération d'emballage, les deux extrémités du film provenant de la charge et dirigées vers les unités de distribution (3a, 3b) sont coupées et réunies de manière à rétablir la continuité du film entre les deux unités de distribution et entre les deux extrémités provenant de la charge emballée.
  10. Procédé d'emballage selon la revendication 9, dans lequel ladite étape de réunion destinée à rétablir la continuité du film implique le nouage des extrémités du film.
EP03100123A 2002-01-31 2003-01-21 Machine d'emballage avec des bobines opposées et procédé d'emballage correspondant Expired - Lifetime EP1332968B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI20020174 2002-01-31
IT2002MI000174A ITMI20020174A1 (it) 2002-01-31 2002-01-31 Apparecchiatura fasciapallet a bobine contrapposte e relativo metodo di imballaggio

Publications (3)

Publication Number Publication Date
EP1332968A2 EP1332968A2 (fr) 2003-08-06
EP1332968A1 EP1332968A1 (fr) 2003-08-06
EP1332968B1 true EP1332968B1 (fr) 2005-11-16

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ID=11449052

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03100123A Expired - Lifetime EP1332968B1 (fr) 2002-01-31 2003-01-21 Machine d'emballage avec des bobines opposées et procédé d'emballage correspondant

Country Status (5)

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EP (1) EP1332968B1 (fr)
AT (1) ATE309945T1 (fr)
DE (1) DE60302262T2 (fr)
ES (1) ES2252617T3 (fr)
IT (1) ITMI20020174A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101657357B (zh) * 2007-03-19 2011-09-14 伊利诺斯工具制品有限公司 用于将物品封装到封装薄膜内的薄膜封装机及其方法

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2872487B1 (fr) * 2004-07-02 2007-02-09 Finzy Sylvie Dispositif de banderolage simultane des faces laterales et d'une face d'extremite d'une charge palettisee
FR2872486B1 (fr) * 2004-07-02 2008-02-15 Finzy Sylvie Dispositif de banderolage d'une charge palettisee permettant la fermeture a la face superieure de ladite charge, et procede de banderolage correspondant
US8549819B1 (en) * 2006-10-11 2013-10-08 Darrel Bison Pallet roping and wrapping apparatus and method
US9802722B1 (en) 2006-10-11 2017-10-31 Darrel Bison Pallet roping and wrapping apparatus
US20080229714A1 (en) 2007-03-19 2008-09-25 Illinois Tool Works Inc. Film wrapping machine utilizing two film carriage assemblies to effectively perform film change operations
BR112013004240B1 (pt) * 2010-08-24 2018-07-31 Cnh Industrial America Llc Aparelho de formação de fardo móvel
BE1021295B1 (nl) * 2013-08-06 2015-10-23 Ontex Bvba Verbeterde verpakkingsmethode en apparaat
US11685562B1 (en) 2020-04-03 2023-06-27 Darrel Bison Pallet wrapping system with overlapping bands
US11628959B1 (en) 2020-04-03 2023-04-18 Darrel Bison Shipping pallet wrapping system
US11434029B1 (en) 2020-04-03 2022-09-06 Darrel Bison Shipping pallet wrapping system
US11801953B2 (en) 2022-01-06 2023-10-31 Darrel Bison Pallet wrapping system with overlapping bands
US11780628B1 (en) 2022-01-06 2023-10-10 Darrel Bison Encoder mount for a pallet wrapping system
US11912452B1 (en) 2022-01-06 2024-02-27 Darrel Bison Pallet wrapping system with intelligent monitoring
CN114933042B (zh) * 2022-06-08 2024-01-26 浙江临安金洲纸业有限公司 一种大型纸卷的打包装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000053497A1 (fr) * 1999-03-11 2000-09-14 Seelen A/S Machine a envelopper a film etirable et enveloppement d'objets empiles sur palettes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101657357B (zh) * 2007-03-19 2011-09-14 伊利诺斯工具制品有限公司 用于将物品封装到封装薄膜内的薄膜封装机及其方法

Also Published As

Publication number Publication date
ES2252617T3 (es) 2006-05-16
ATE309945T1 (de) 2005-12-15
ITMI20020174A0 (it) 2002-01-31
DE60302262T2 (de) 2006-08-10
DE60302262D1 (de) 2005-12-22
EP1332968A1 (fr) 2003-08-06
ITMI20020174A1 (it) 2003-07-31

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