EP0052057B1 - Verfahren und Vorrichtung zum Überziehen einer Ladung mit einer Schlauchfolie - Google Patents

Verfahren und Vorrichtung zum Überziehen einer Ladung mit einer Schlauchfolie Download PDF

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Publication number
EP0052057B1
EP0052057B1 EP19810401773 EP81401773A EP0052057B1 EP 0052057 B1 EP0052057 B1 EP 0052057B1 EP 19810401773 EP19810401773 EP 19810401773 EP 81401773 A EP81401773 A EP 81401773A EP 0052057 B1 EP0052057 B1 EP 0052057B1
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EP
European Patent Office
Prior art keywords
tubular sheath
cutting
welding
load
anyone
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
Application number
EP19810401773
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English (en)
French (fr)
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EP0052057A1 (de
Inventor
Louis Hugon
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Pakem A Responsabilite Dite Ltee Ste
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Pakem A Responsabilite Dite Ltee Ste
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    • 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 present invention relates to a method and a machine for covering a load with a tubular sheath.
  • a machine known for implementing this method comprises an internal table for receiving the load; support means for a tubular sheath coil; mobile means for gripping the free end part of the tubular sheath coming from the coil; means for guiding the gripping means in the general vertical direction; possibly manual means for moving the gripping means in the upward or downward direction, along the guide means; upper means for transverse welding of the tubular sheath.
  • the initial phase of the process consists in simultaneously opening the tubular sheath, starting with its initial free end part and unwinding the sheath coil so as to bring the initial free end part of the sheath from its original position to the right cutting means and transverse welding to its starting position in line with the load, in particular its upper face.
  • the tubular sheath is cut in a single phase, most often simultaneously with welding.
  • Known machines therefore most often comprise single cutting means placed immediately upstream of the welding means, these cutting means being suitable for making a cutting line on the tubular sheath, separating the latter. in two completely separate sections.
  • the welding means and the cutting means are generally placed on two jaws, for example a fixed jaw and a movable jaw.
  • known machines Given the need to make a clean and perfect cut of the tubular sheath, known machines generally include means for driving the fairly complex movable jaw in the form of a jack whose axis is perpendicular to the plane of travel of the tubular sheath between the two jaws, which therefore requires an appropriately shaped frame.
  • Known machines also include means for gripping in two sub-assemblies, namely a lower sub-assembly movable vertically, in the ascending or descending direction, between the upper face of the load and its lower part and a second sub-assembly placed between the transverse cutting and welding means and the first sub-assembly, with a view to bringing the tubular sheath from the cutting means associated with the welding means to the first gripping sub-assembly, while opening the tubular sheath.
  • this second subset is by nature quite sophisticated.
  • the method and the known machine generally give satisfaction, especially in the case of loads of fixed dimensions, the machine then operating at high speed and the means which compose it being mechanized and very sophisticated.
  • the present invention aims to remedy these drawbacks and for this purpose it proposes a method of the type described above in which the tubular sheath is cut in two distinct phases, ie a first partial precut phase, substantially simultaneously with the phase of welding and a second subsequent final stage of finishing or cutting proper, when the tubular sheath occupies a final position on the load.
  • the initial phase of the process is the opening of the initial free end part of the tubular sheath, without the need then simultaneously to unwind the coil of the sheath.
  • a machine of the type indicated above is according to the invention characterized in that it comprises in combination on the one hand means for precutting the tubular sheath, placed upstream of the welding means, suitable for producing on the sheath tubular a pre-cut line and on the other hand means of finishing or actual cutting of the tubular sheath, placed downstream of the welding means.
  • the tubular sheath has been pre-cut, the two sections of tubular sheath on either side of the pre-cut line are joined to each other, so that a traction exerted on one of the sections allows to train the other.
  • this precut line constitutes a line of weakening of the tubular sheath such that the subsequent cutting can then be carried out by simple pressure exerted transversely on the tubular sheath at the location or in the vicinity of the precut line.
  • This arrangement therefore makes it possible to continue to drive the tubular sheath wound on its bo storage bin, even though the transverse welding and the precut have been carried out, so that the initial extreme part of the tubular sheath can come directly in line with the vertically movable gripping means, without requiring a gripping sub-assembly placed between the welding means and the upper face of the load.
  • the welding and precut means are carried by two jaws.
  • the displacement of the movable jaw no longer requires the precision necessary in the prior art (since only a precut is made and not a complete cut) which makes it possible to facilitate the means of driving the movable jaw which can then be in the form of an inclined cylinder, which at the same time facilitates the construction of the frame of the machine and releases the upper part thereof.
  • a method and a machine are proposed for covering a load 1 with a tubular sheath 2.
  • the load 1 is for example a load carried by a pallet 3 and limited by lateral faces 4 in particular vertical and an upper face 5 in particular horizontal.
  • the tubular sheath is constituted for example by a film of heat-sealable plastic material stored flat, by virtue of the bellows of the sheath on a coil 6 of axis 6A horizontal.
  • the method and the machine aim to cover the lateral faces 4 and the upper face 5 with the tubular sheath 2.
  • the machine comprises a frame 7 extending vertically; a table 8, lower, for receiving the load 1, in particular a roller table to allow the supply of the load 1 and its evacuation when it is provided with the tubular sheath 2.
  • a table 8 lower, for receiving the load 1, in particular a roller table to allow the supply of the load 1 and its evacuation when it is provided with the tubular sheath 2.
  • To the frame 7 are fixed support means for the coil 6 such as a mandrel 6A.
  • the machine comprises thirdly gripping means 10 of the initial free end portion 11 of the tubular sheath 2 coming from the coil 6, mounted in a movable manner as will be seen later.
  • the machine comprises guide means 12 for gripping means 10 in the general vertical direction along, at the periphery and near the lateral faces 4 of the load 1.
  • the machine comprises means 13 for moving the gripping means 10 in the upward or downward direction along the guide means 12.
  • the machine also includes means 14 for transversely welding the tubular sheath 2, placed at the top of the frame 1, directly above the table 8.
  • the machine according to the invention comprises, in combination on the one hand, means for precutting 15 the tubular sheath 2, placed upstream from the welding means 14 relative to the direction of unwinding of the tubular sheath 2 from the coil 6, the precut means 15 being adapted to produce on the tubular sheath 2 a transverse precut line 16.
  • the machine comprises means of finishing or cutting proper 17 of the tubular sheath 2 placed downstream of the welding means 14.
  • FIGS. 1A to 1G The phases of the process according to the invention are illustrated in FIGS. 1A to 1G.
  • the initial extreme part 11 of the sheath 2 is opened, the coil 6 is unwound. Simultaneously, it is engaged progressively, by its initial free end part 11 around the load 2, in particular from its face. upper 5.
  • a cut and a transverse welding of the tubular sheath 2 are carried out.
  • the tubular sheath is cut in two distinct phases, ie a first phase (fig. 1 C) of partial precutting substantially simultaneously with the welding phase and a second final phase (fig. 1 E) subsequent to finishing or cutting proper when the tubular sheath 2 occupies its final position on the load 1.
  • a first phase fig. 1 C
  • a second final phase fig. 1 E
  • This phase is continued, which corresponds to a vertical downward movement of the tubular sheath 2 until the length of the tubular sheath between the initial free end portion 11 and the welding means 14 corresponds to the length of tubular sheath 2 necessary to cover the load 1, in particular its lateral faces 4 and its upper face 5.
  • This length corresponds for example substantially to the height of the load 1 and to the half width of the upper face 5.
  • the welding means 14 are then actuated which make a transverse welding line 18 on the tubular sheath 2.
  • the precut line 16 is produced upstream and preferably in the immediate vicinity of the weld line 18 (FIG. 1C).
  • tubular sheath parts on either side of the precut lines 16 and welding 18 are associated with each other.
  • the load 1 provided with its sheath 2 can then be removed (fig. 1 F).
  • the new initial end portion 11 of the tubular sheath 1 is then opened, without having to unwind the coil 6 or to scroll the tubular sheath 2 opposite the welding means 14 and precut 15.
  • the finishing and cutting phase itself can be carried out manually.
  • the actual finishing and cutting phase can be carried out by simple transverse pressure on the tubular sheath right or in the vicinity of the pre-cut line 16.
  • the precut means 15 are located in the immediate vicinity of the welding means 14.
  • the finishing means 17 can be manual. They are separated from the welding means 14 downstream, in particular located in the vicinity of the upper face 5 of the load 1 which has just been covered with a sheath.
  • the finishing means 17 can be in the form of a horizontal bar, parallel to the plane of travel of the tubular sheath 2, the section being obtained by simple transverse pressure of this bar on the tubular sheath 2 at the place or at the neighborhood of the precut line 16.
  • finishing means 17 are adjustable, being mounted to slide on vertical guide means, so that they can be placed at the desired location, depending on the position of the pre-cut line 16 , which itself depends on the height of the load 1.
  • finishing means 17 is within the scope of the invention.
  • the machine may not actually include integrated finishing means 17, the finishing phase being carried out by the outside operator, by means of an appropriate cutting or similar tool.
  • the gripping means 10, the guiding means 12, the means 13 can be the subject of numerous variant embodiments which all come within the scope of the invention.
  • the guide means 12 and the means 13 are merged and constituted for example by endless chains stretched between sprockets 19 placed at the upper part and at the lower part of the frame 7, these endless chains being driven by a motor or possibly manually by a handle.
  • these endless chains have a return 20 whose direction of movement is reversed relative to the direction of movement of the gripping means 10 associated with the endless chains, a handle 21 being fixed to the return 20 to allow its movement, this handle 20 moving opposite a graduation 22 making it possible to indicate the necessary displacement stroke of the handle 21 for a given load height.
  • the handle 21 is placed at the lower part of the frame 7 when the gripping means 10 are placed at the upper part of the frame as illustrated in FIG. 2.
  • the guide means 12 being for example slides
  • the means 13 being for example worms, cables, etc.
  • the gripping means 10 are movable from an initial position (that shown in FIGS. 1A, 1F, 1G, 2, 3) separated from the welding means 14 and precut 15 without the need to interpose between this initial position of said means and the welding means 14 and precut 15 of the means for driving the tubular sheath 2.
  • the welding 14 and precut 15 means are preferably placed on two jaws, ie a fixed jaw 23, carried by the frame 7 and a movable jaw 24, opposite the fixed jaw 23.
  • the jaws 23, 24 are interposed between an upstream deflection roller 25 and two downstream rollers 26 in the immediate vicinity of one another.
  • the movable jaw 24 is moved by a drive member 27 in the form of a jack articulated by its head 28 to the movable jaw 24 around an axis 29 and by its body 30 to the frame 7 around an axis 31.
  • the jack 27 is tilted up and down between the body 30 and the head 28.
  • the movable jaw 24 is fixed to a link 32 articulated around an axis 33 placed above and vertically of the two jaws 23, 24.
  • the fixed jaw 23 and movable jaw 24 have at their lower part the welding means 14 such as heating means including an electrical resistance.
  • the precut means 15 comprising, on one of the jaws, in particular the movable jaw 24, a precut blade 34 cooperating with a cavity 35 formed in the fixed jaw 23, opposite, of sufficient depth.
  • the blade 34 has a sharp edge with teeth which allows to make the pre-cut line 16.
  • the jaws 23, 24 are associated, upstream, with means 36 preventing any untimely upward movement of the sheath 2.
  • These means 36 may include a stop 37 fixed to the fixed jaw 23 on its upper face, to which is applied a bar 38, urged towards the stop 37 by an elastic member 39 such as a helical spring.
  • the bar 38 is coated with an anti-slip material such as a rubber.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Claims (15)

1. Verfahren zum Überdecken einer Ladung (1) eines Rohrmantels (2), in dem das Eingangsende (11) des Rohrmantels (2) geöffnet, die Spule (6), auf der der Rohrmantel gewickelt ist, geteilt und der Rohrmantel (2) mit seinem Eingangsende (11) insbesondere mit seinem oberen Teil (5) um die Ladung (1) fortschreitend zum Eingriff gebracht wird, dadurch gekennzeichnet, daß der Schnitt des Rohrmantels (2) in zwei getrennten Phasen durchgeführt wird, d. h. einer ersten teilweisen Vorschnittsphase, die im wesentlichen mit der Schweißphase gleichzeitig einhergeht, und einer zweiten späteren Abschlußphase oder dem eigentlichen Schnitt, wenn der Rohrmantel (2) seine endgültige Stellung auf der Ladung einnimmt.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die erste Phase des Vorschnitts durchgeführt wird, wenn der Rohrmantel nur teilweise mit der Ladung (1) in Eingriff steht.
3. Verfahren nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß die Abschlußphase von Hand durchgeführt wird.
4. Verfahren nach einem der vorhergehenden Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Abschlußphase durch einfachen Querdruck auf den Rohrmantel (2) senkrecht zur oder in der Nähe der Vorschnittlinie (16) durchgeführt wird.
5. Verfahren nach einem der vorhergehenden Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Anfangsphase des Verfahrens in dem Öffnen des Eingangsendes (11) des Rohrmantels besteht, ohne daß es dabei nötig ist, die Spule (6) zu teilen.
6. Vorrichtung zum Überdecken einer Ladung (1) eines Rohrmantels (2) bestehend aus einem unteren Tisch (8) zur Aufnahme der Ladung (1), Halterungen (6A) für eine Spule (6) des Rohrmantels, bewegliche Greifmittel (10) des freien Endteils des Rohrmantels (2), das von der Spule (6) herführt, Führungen (12) für die Greifmittel in allgemein senkrechter Richtung und etwaige Handwerkzeuge zum Versetzen der Greifmittel nach oben oder unten längs der Führungen (12) sowie obere Schweißeinrichtungen (14) transversal zum Rohrmantel (2), gekennzeichnet durch eine kombinierte Anordnung aus einerseits den Vorschnittmitteln (15) des Rohrmantels (2), die oberhalb der Schweißeinrichtung (14) liegen und zweckmäßig ausgebildet sind, eine transversal verlaufende Vorschnittlinie auf dem Rohrmantel zu schaffen, und aus andererseits den Mitteln der Endbearbeitung oder eigentlichen Schnittführung (17) des Rohrmantels (2), die den Schweißeinrichtungen (14) nachgeschaltet sind.
7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die Vorschnittmittel (15) den Schweißeinrichtungen (14) unmittelbar vorgeschaltet sind, wobei die Einheit als zwei feste und bewegliche (23 bzw. 24) Spannbacken ausgebildet ist und wobei die Mittel der Endbearbeitung (17) den Schweißeinrichtungen (14) nachgeschaltet und von diesen getrennt angeordnet sind.
8. Vorrichtung nach einem der Ansprüche 6 und 7, dadurch gekennzeichnet, daß die Mittel für die Endbearbeitung (17) von Hand zu betätigen sind.
9. Vorrichtung nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, daß die Mittel der Endbearbeitung (16) in senkrechten Gleitlagern einstellbar angeordnet sind.
10. Vorrichtung nach einem der Ansprüche 6 bis 9, dadurch gekennzeichnet, daß die Mittel der Endbearbeitung (17) aus einem Stab bestehen, der auf den Rohrmantel durch einfachen Druck in transversaler Richtung einwirkt.
11. Vorrichtung nach einem der Ansprüche 6 bis 10, dadurch gekennzeichnet, daß die Greifmittel (10) ausgehend von einer Anfangsstellung, die hinter und getrennt von der Schweißeinrichtung (14) liegt, beweglich sind, wobei zwischen der Schweißeinrichtung (14) und der Anfangsstellung der Greifmittel (10) keine Triebvorrichtungen für den Rohrmantel bestehen.
12. Vorrichtung nach einem der Ansprüche 6 bis 11, dadurch gekennzeichnet, daß die Führungen (12) und die Einrichtung (13) zum Verschieben der Greifmittel (10) gemeinsam genutzt werden.
13. Vorrichtung nach einem der Ansprüche 6 bis 12, dadurch gekennzeichnet, daß die Vorschnittmittel (15) eine Schneide (34) aufweisen, die von einer Spannbacke (24) getragen wird und mit einer Vertiefung (35) zusammenarbeitet, die in der anderen Spannbacke (23) eingelassen ist.
14. Vorrichtung nach einem der Ansprüche 6 bis 13, dadurch gekennzeichnet, daß die bewegliche Spannbacke (24) von einem Antriebsorgan verschoben wird, das als zwischen dem Körper (30) und dem Kopf (28) von oben nach unten geneigt verlaufende Winde ausgebildet ist, wobei die bewegliche Spannbacke (24) mit einem Stößel (32) verbunden ist, der um eine Achse (33) angelenkt ist, die über und senkrecht zu den beiden Spannbacken (23,24) liegt.
15. Vorrichtung nach einem der Ansprüche 6 bis 14, gekennzeichnet durch Mittel (36) zum Verhindern jeglicher unbeabsichtigter Verschiebung nach oben von Rohrmantel (2) wie ein Anschlag (37), der an der festen Spannbacke (23) befestigt ist, mit dem ein Stab (38) zusammenarbeitet, der von einem elastischen Glied (39) zum Anschlag (37) hin betätigt wird, wobei der Stab (38) zweckmäßig mit einem rutschfesten Werkstoff überzogen ist.
EP19810401773 1980-11-07 1981-11-06 Verfahren und Vorrichtung zum Überziehen einer Ladung mit einer Schlauchfolie Expired EP0052057B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8023906A FR2493801B1 (fr) 1980-11-07 1980-11-07 Procede et machine pour recouvrir une charge d'une gaine tubulaire
FR8023906 1980-11-07

Publications (2)

Publication Number Publication Date
EP0052057A1 EP0052057A1 (de) 1982-05-19
EP0052057B1 true EP0052057B1 (de) 1984-08-08

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Application Number Title Priority Date Filing Date
EP19810401773 Expired EP0052057B1 (de) 1980-11-07 1981-11-06 Verfahren und Vorrichtung zum Überziehen einer Ladung mit einer Schlauchfolie

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EP (1) EP0052057B1 (de)
DE (1) DE3165442D1 (de)
FR (1) FR2493801B1 (de)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3738079A (en) * 1971-02-11 1973-06-12 Auburn Eng Inc Bag type shrink wrapping apparatus
IT1106665B (it) * 1978-05-18 1985-11-18 Anidriti Dreste Metodo ed apparecchiatura per formare e riempire involucri derivando questi da materiale tubolare in bobina

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FR2493801A1 (fr) 1982-05-14
FR2493801B1 (fr) 1985-10-31
DE3165442D1 (en) 1984-09-13
EP0052057A1 (de) 1982-05-19

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