EP1502856A1 - Verfahren und Einrichtung zum automatischen Wechseln von Folienrollen einer Maschine für das Umwickeln von Palettenladungen - Google Patents

Verfahren und Einrichtung zum automatischen Wechseln von Folienrollen einer Maschine für das Umwickeln von Palettenladungen Download PDF

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Publication number
EP1502856A1
EP1502856A1 EP04016810A EP04016810A EP1502856A1 EP 1502856 A1 EP1502856 A1 EP 1502856A1 EP 04016810 A EP04016810 A EP 04016810A EP 04016810 A EP04016810 A EP 04016810A EP 1502856 A1 EP1502856 A1 EP 1502856A1
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EP
European Patent Office
Prior art keywords
reel
film
gripper
spindle
carriage
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.)
Withdrawn
Application number
EP04016810A
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English (en)
French (fr)
Inventor
Danica Pieri
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Pieri Srl
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Pieri Srl
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Filing date
Publication date
Application filed by Pieri Srl filed Critical Pieri Srl
Publication of EP1502856A1 publication Critical patent/EP1502856A1/de
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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
    • B65B11/02—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
    • 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
    • B65B2210/00—Specific aspects of the packaging machine
    • B65B2210/14—Details of wrapping machines with web dispensers for application of a continuous web in layers onto the articles
    • B65B2210/16—Details of wrapping machines with web dispensers for application of a continuous web in layers onto the articles the web dispenser travelling around the article along a non-rotating ring

Definitions

  • the invention concerns a method and the associated apparatus for automatically replenishing the reel of film in machines for wrapping palletized loads with stretch film, in particular in so-called ring machines in which the carriage which supports the reel of wrapping film and the motorized unit for pre-stretching the film unwound from this reel travels along an annular, round, horizontal structure which is connected to raising and lowering means and in the centre of which the load to be wrapped with a helically wound turn of the said pre-stretched film is positioned.
  • the front end of the wrapping film is initially retained by a gripper device which is located in a fixed position, laterally with respect to the load, or which may be associated with the said annular structure.
  • FIG 1 denotes the horizontal ring of the wrapping machine which is mounted in a known manner and with the possibility of vertical displacement on a support structure 2 and on which there travels, guided in a known manner, a carriage 3 motorized with means which are also known and which, upon operation, cause it to rotate, for example in the direction of the arrow F, about the palletized load to be wrapped C, located on a transportation rollerway driven for example in the direction F1, not visible in the drawings and located in the centre of the ring 1.
  • the reel B of film is mounted with its cardboard core on a spindle 4 in turn mounted rotatably on the base of an L-shaped cradle 5 which with its ascending part is horizontally pivoted at 6 on a vertical support 7 fixed to the carriage 3 and located underneath the latter.
  • the pivot 6 is for example tangential to the curvature of the carriage 3 and, following rotation of the cradle 5 about the pivot 6, the spindle 4 with the reel is able to pass from the vertical working position into the horizontal position, with an orientation towards the outside of the machine, as shown in Figure 4 by dot-dash lines and in Figure 2 by broken lines.
  • This change-over in the position of the spindle 4 is performed by a linear actuator 8 of the electromechanical type which is hinged at one end, as indicated by 108, with an arm 105 of the cradle 5 and hinged at the other end, as indicated by 208, with a support 9 fixed in a suitably offset manner on the support 7.
  • the vertical and rubberized pre-stretching rollers 10, 10' are located in a known manner underneath the carriage 3 and are actuated at varying speeds by the motor 11 and are also oriented downwards so as to be parallel and at the same height as the reel B when in the vertical position.
  • the film Z unwound from the reel B is driven on a first idle and vertical roller 12 rotatably supported by the carriage 3 and then passes over the pre-stretching rollers 10, 10', touching them over a wide section owing to the action of three idle drive rollers which comprise an intermediate static roller 13 located between the rollers 10, 10' and spring-loaded end rollers 14, 14' which operate in contact with the said pre-stretching rollers.
  • the rollers 13, 14, 14' are arranged in a known manner, the first with a static constraining system and the others with an oscillating constraining system and with opposition springs, on a kind of door or hatch 15 hinged at one end with a vertical hinging axis 16 supported by the carriage 3.
  • the means for driving the film Z unwound from the reel B comprise, upstream of the pre-stretching rollers, a vertical roller 20 made of suitable plastic material and operating in contact with the said reel B so as to rotate it on the spindle 4, at a peripheral speed which is usually the same as that of the first pre-stretching roller 10.
  • the roller 20 is for example supported by an overlying arm 21 oscillating on the axis of the roller 10 and pushed by suitable means not shown against the reel B and the said arm houses a movement transmission mechanism, not shown, which kinematically connects together the rollers 20 and 10, with the correct speed ratio.
  • the film Z Downstream of the pre-stretching rollers, the film Z travels over a jockey wheel 22 parallel to the other rollers, oscillating about a pivot 23 mounted on the carriage 3 and associated with transducers of the known type which, depending on the angular position of the said jockey wheel and the consequent need for film by the load to be wrapped, control in an intelligent manner the rotation of the motor 11 so that the film is supplied to the load under predetermined and constant tensioning conditions.
  • the film Z Upon leaving the jockey wheel 22, the film Z passes over an idle roller 24 supported by the carriage 3 parallel to and at the same height as all the other rollers and upon leaving this roller 24 the film is then conveyed to the load to be wrapped C.
  • the innovative modification which has been made by the invention to the means described hitherto essentially consists in the simplified architecture of the cradle 5 which carries the reel support spindle 4, in the possibility which this support has of performing a swing movement through ninety degrees and in the motorization of this swing movement and that of the hatch 15 by means of electromechanical actuators, so as to allow complete automation of the reel change-over cycle.
  • the electromechanical actuators 8 and 17 which are mounted on the carriage 3 may be easily actuated by means of supply and control lines similar to those for supplying and controlling the motor 11.
  • the carriage 3 stops in a predetermined position of the round angle, as can be seen from Figure 1, with the spindle 4 which when it performs the ninety degree swing movement and is arranged horizontally outwards, is oriented at right angles and at a short distance from the longitudinal guides of a horizontal frame 25 which rests on the ground with adjustable feet 125 and on which a slide 26 is mounted in a longitudinally slidable manner, said slide 26 being connected to one of the arms of a rectilinear conveyor 27 situated longitudinally on the said frame 25 and operated by a motor unit 28 able to rotate in both directions, with a brake, optionally of the type with electronic speed and phase control, or of the conventional type, assisted by position sensors, all of which in manner which is deducible and can be easily realized by a person skilled in the art on the basis of that described further below.
  • a brake optional
  • the spindle 4 When the slide 26 is in the rest position, the spindle 4, when arranged horizontally, is located axially aligned with the two facing and self-centring jaws of a gripper 29 which is oriented for example downwards and situated on the end of a slide 30 slidable longitudinally owing to the action of special movement means, not shown, along a guide 31 parallel to the said horizontal spindle 4 and mounted in a projecting manner on an upright 131 fixed onto the front end of the slide 26.
  • the slide 30 and the guide 31 may for example form part of a linear actuator of the pneumatic type, for example of a so-called rodless cylinder.
  • the means which perform opening and closing of the gripper also consist for example of small pneumatic cylinders. Suitable means are envisaged for ensuring that, when the spindle 4 is arranged horizontally, the gripper 29 is moved, open, onto the end section closest to the core of the empty reel situated on the said spindle, after which the said gripper is closed so as to grip the said core and is then retracted by a sufficient amount to extract the core A of the used reel.
  • the slide 26 is displaced into the maximum travel position on the guide frame 25 so that the gripper 29 moves opposite a chute 132 above which the said gripper opens and allows the empty core A to fall so that, by means of gravity, it is stored inside an adjacent and more spacious container 32.
  • a suitable number - for example three or more - of slide/guide units 33, 33', 33" with associated pneumatic movement cylinders 34, 34', 34" are provided directly on the slide 26, parallel to the assembly 30, 31 with the gripper 29, and the slides of these units have, mounted thereon in a parallel arrangement, cradles 35, 35', 35" with identically driven rollers which support respective new reels of film B, B', B" which may rotate or move along their axis when left free by underlying braking pads 36, 36', 36" actuated by actuators for example of the pneumatic type.
  • Each cradle is provided with a special sensor which detects the presence or absence of a reel thereon and which transmits this information to the means which control automatic operation of the system.
  • the reels have the same diameter and with their axis are parallel to and at the same height as the axis of the spindle 4 when in the horizontal position.
  • Each cradle 35, 35', 35" is provided laterally with three supports 37, 37', 37" with friction grippers on which the end and a middle part of a section of sufficient length of the front end of the film unwound from the reel is suspended, being collected in a bundle and positioned at a predetermined height.
  • the gripper in question is denoted by 38 and comprises a jaw 138 fixed vertically on the top end of a vertical shaft which with its lateral lugs 139, 139' is fixed onto the vertical-roller links of a pair of identical, closed, horizontal chains 40, 40' arranged one above the other and slidable in a corresponding pair of identical, shaped, horizontal guides 41, 41' arranged one above the other and made of any material with a low coefficient of friction, for example Polizene, and are supported by a frame 42 which rests on the ground with its adjustable feet 142.
  • the chains 40, 40' are driven on pairs of idle pinions 43 and on a pair of driving pinions 44 connected to a reduction gear unit 45 with a motor rotating in both directions and equipped with brake.
  • the guides 41, 41' are structured so that the associated chains and the consequently the gripper 38 follow a path which, in plan view, is substantially in the form of an L or a C (see Figure 1) and is described more fully below.
  • the gripper 38 comprises a movable jaw 238 which is hinged at 46 with the shaft 39 and is in turn hinged at 47, at an appropriate distance from the pivot 46, with a tie-rod 48 which is hinged at 49 with a connecting rod 50 hinged at 51 on the bottom end of the shaft 39.
  • the movable jaw 238 is essentially associated with a hinged quadrilateral which comprises a roller 52 on the hinging axis 49, which from the raised position shown in continuous lines, corresponding to raising of the jaw 238 and closing of the gripper 38, is able to pass into the lowered position, indicated by broken lines, corresponding to the open condition of the said gripper.
  • the gripper 38 is open and is in the initial position along its path, indicated by K1 in Figure 1.
  • the displacement of the open gripper 38 is performed towards the left and it is envisaged that, when the fixed jaw 138 of this gripper arrives in co-operation with the front end of the film of the said reel, retained by the said temporary supports 37, the roller 52 mounts a switching device 53 already in the raised position so that the movable jaw 238 is raised and so that the gripper 38 firmly grips the front end of the film and retains it even when the roller 52 abandons the switching device and passes onto a rail 54 which has a fixed position heightwise and is integral with the frame 42.
  • the switching device 53 is hinged at 55 with a support fixed to the frame 42 and is hinged at 56 with the rod of a pneumatic cylinder 57 also hinged with the frame 42, so that this switching device may be operated so as to be lowered into the position shown in Figure 6 in broken lines, for the reasons explained further below.
  • the travel movement of the gripper 38 stops in the position indicated by K2 in Figure 1, when the front end of the film is positioned beyond the idle roller 12 of the carriage 3.
  • the gripper 38 has a heightwise position such that it is able to move, for example, to about half the height of the rollers situated on the carriage 3.
  • the front end of the film is separated from the friction supports 37, the function of which also consists in creating a suitable pocket of film for the first aforementioned step involving the movement of the gripper 38, when passing from K1 to K2.
  • the bottom brake 36 of the reel being supplied is deactivated (Fig. 5) and a static pusher 58 intervenes (Fig. 1) being also actuated by a pneumatic cylinder supported by a support 158 which inserts the said reel onto the spindle 4, following which the said pusher returns into the rest position and the spindle 4 is raised and is arranged vertically with the new reel.
  • the starting movement of the gripper 38 is activated so that it passes from the position K2 into the position K3, so as to arrange a corresponding section of film in front of the pre-stretching rollers 10, 10' which during this step rotate at the correct speed and in accordance with the advancing movement of the said film, while the reel also rotates at the correct speed owing to the action of the peripheral roller 20 (Fig. 2).
  • the front end of the film is also made to pass over the jockey wheel 22 and, when the said gripper 38 reaches the position K3, it stops and is situated at a small distance, laterally and at the bottom of the load C to be wrapped.
  • phase sequence the actuator 17 intervenes so as to close the hatch 15 with the associated drive rollers 13, 14, 14' (Fig. 2) which are arranged in the active position.
  • the carriage 3 of the machine starts to move in the direction F in Figure 1 so as to wrap the bottom part of the load with a first wound turn of film and, before this turn is completed, the ring 1 which supports the carriage 3 is suitably raised so that the said first wound turn is terminated above the gripper 38 which is thus prepared for the following working steps.
  • a double-acting switching device 59 (Fig. 6) which is hinged at 60 with the frame 42 and hinged at 61 with a pneumatic cylinder 62, the roller 52 of the gripper assembly 38 is lowered, the gripper 38 is opened and in these conditions the said gripper is brought back into the position K1 with reversal of the above movement, without any risk of interference either with the film or with the rollers of the carriage 3 which is in a different angular position and is in any case at a greater height.
  • the switching device 53 is lowered, so that the roller 52 is able to pass beyond it without interference (Fig. 6), leaving the gripper 38 open and therefore in the required condition for repeating a subsequent working cycle.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
  • Replacement Of Web Rolls (AREA)
EP04016810A 2003-07-31 2004-07-16 Verfahren und Einrichtung zum automatischen Wechseln von Folienrollen einer Maschine für das Umwickeln von Palettenladungen Withdrawn EP1502856A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO20030456 ITBO20030456A1 (it) 2003-07-31 2003-07-31 Metodo ed apparato per il rifornimento automatico della bobina dei film nelle macchine avvolgitrici di carichi pallettizzati con film estensibile, particolarmente nelle cosiddette macchine ad anello.
ITBO20030456 2003-07-31

Publications (1)

Publication Number Publication Date
EP1502856A1 true EP1502856A1 (de) 2005-02-02

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EP04016810A Withdrawn EP1502856A1 (de) 2003-07-31 2004-07-16 Verfahren und Einrichtung zum automatischen Wechseln von Folienrollen einer Maschine für das Umwickeln von Palettenladungen

Country Status (2)

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EP (1) EP1502856A1 (de)
IT (1) ITBO20030456A1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1655225A1 (de) * 2004-03-02 2006-05-10 TOSA S.r.l. Verfahren und Einrichtung zum automatischen Wechseln von Folienrollen einer Maschine für das Umwickeln von Palettenladungen
WO2008115865A1 (en) * 2007-03-19 2008-09-25 Illinois Tool Works Inc. Automatic film changer for a film wrapping machine
ITMO20110284A1 (it) * 2011-11-07 2013-05-08 Aetna Group Spa Macchina avvolgitrice per bagagli
CN110510164A (zh) * 2019-08-21 2019-11-29 安徽金鹏住工有限公司 一种用于铝合金门窗的包装工艺结构
EP3448759A4 (de) * 2016-04-28 2020-01-08 Lantech.Com, Llc Automatischer rollenwechsel für eine stretch-einschlagmaschine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0293352A2 (de) * 1987-05-27 1988-11-30 Newtec International Vorrichtung und Verfahren zum Wechseln einer Folienrolle zur Umhüllung
US5562385A (en) * 1993-07-16 1996-10-08 G.D. S.P.A. Apparatus for loading reels into a packaging machine
EP1097867A1 (de) * 1999-11-05 2001-05-09 AETNA GROUP S.p.A. Einrichtung zum automatischen Wechseln von Folienrollen
EP1201584A2 (de) * 2000-10-25 2002-05-02 Illinois Tool Works Inc. Automatischer Folienrollenwechsler und Verfahren zum Betrieb desselben
EP1273519A1 (de) * 2000-03-23 2003-01-08 Mas, Construcciones Mecanicas, S.A. Umhüllungsverfahren und-apparat
US20030066269A1 (en) * 2001-08-28 2003-04-10 Roger Federeszyn Automatic stretch film roll changer

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0293352A2 (de) * 1987-05-27 1988-11-30 Newtec International Vorrichtung und Verfahren zum Wechseln einer Folienrolle zur Umhüllung
US5562385A (en) * 1993-07-16 1996-10-08 G.D. S.P.A. Apparatus for loading reels into a packaging machine
EP1097867A1 (de) * 1999-11-05 2001-05-09 AETNA GROUP S.p.A. Einrichtung zum automatischen Wechseln von Folienrollen
EP1273519A1 (de) * 2000-03-23 2003-01-08 Mas, Construcciones Mecanicas, S.A. Umhüllungsverfahren und-apparat
EP1201584A2 (de) * 2000-10-25 2002-05-02 Illinois Tool Works Inc. Automatischer Folienrollenwechsler und Verfahren zum Betrieb desselben
US20030066269A1 (en) * 2001-08-28 2003-04-10 Roger Federeszyn Automatic stretch film roll changer

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1655225A1 (de) * 2004-03-02 2006-05-10 TOSA S.r.l. Verfahren und Einrichtung zum automatischen Wechseln von Folienrollen einer Maschine für das Umwickeln von Palettenladungen
US7356976B2 (en) 2004-03-02 2008-04-15 Tosa S.R.L. Method and an apparatus for automatic change of the reel of extensible film in wrapping machines for the packaging of palletized loads
WO2008115865A1 (en) * 2007-03-19 2008-09-25 Illinois Tool Works Inc. Automatic film changer for a film wrapping machine
US7837140B2 (en) 2007-03-19 2010-11-23 Illinois Tool Works Inc. Automatic film changer for a film wrapping machine
ITMO20110284A1 (it) * 2011-11-07 2013-05-08 Aetna Group Spa Macchina avvolgitrice per bagagli
WO2013068942A1 (en) * 2011-11-07 2013-05-16 Aetna Group S.P.A. Baggage wrapping machine
EP3448759A4 (de) * 2016-04-28 2020-01-08 Lantech.Com, Llc Automatischer rollenwechsel für eine stretch-einschlagmaschine
US10822126B2 (en) 2016-04-28 2020-11-03 Lantech.Com, Llc One-way clutch arrangement for stretch wrapping machine
EP3766789A1 (de) * 2016-04-28 2021-01-20 Lantech.Com LLC Automatischer rollenwechsel für eine stretch-einschlagmaschine
US10899485B2 (en) 2016-04-28 2021-01-26 Lantech.Com, Llc Automatic roll change for stretch wrapping machine
US11401063B2 (en) 2016-04-28 2022-08-02 Lantech.Com, Llc Automatic roll change for stretch wrapping machine
CN110510164A (zh) * 2019-08-21 2019-11-29 安徽金鹏住工有限公司 一种用于铝合金门窗的包装工艺结构

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