EP1048571B1 - Apparatus for packaging a palettized load by means of a heat shrinkable sleeve - Google Patents

Apparatus for packaging a palettized load by means of a heat shrinkable sleeve Download PDF

Info

Publication number
EP1048571B1
EP1048571B1 EP20000410041 EP00410041A EP1048571B1 EP 1048571 B1 EP1048571 B1 EP 1048571B1 EP 20000410041 EP20000410041 EP 20000410041 EP 00410041 A EP00410041 A EP 00410041A EP 1048571 B1 EP1048571 B1 EP 1048571B1
Authority
EP
European Patent Office
Prior art keywords
sleeve
heat
fitting
handling apparatus
palette
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
EP20000410041
Other languages
German (de)
French (fr)
Other versions
EP1048571A1 (en
Inventor
Jean-Paul Charles Martin Cocher
Georges Jaconelli
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.)
THIMON
Original Assignee
Thimon SAS
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 Thimon SAS filed Critical Thimon SAS
Publication of EP1048571A1 publication Critical patent/EP1048571A1/en
Application granted granted Critical
Publication of EP1048571B1 publication Critical patent/EP1048571B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B65B53/00—Shrinking wrappers, containers, or container covers during or after packaging
    • B65B53/02—Shrinking wrappers, containers, or container covers during or after packaging by heat
    • B65B53/06—Shrinking wrappers, containers, or container covers during or after packaging by heat supplied by gases, e.g. hot-air jets
    • B65B53/066—Mobile frames, hoods, posts or the like

Definitions

  • the retraction cycle used in material handling machines known successively comprises a first step of transferring the load under the stuffing station, a second transfer step under the retraction station, a step of raising the load allowing the flexible sheath to go lower than the lower level of the support pallet, a first step of retraction of the part low overflowing the sheath, a suction stage of this part overflowing from 10 to 20 cm below the lower plane of the pallet, a step of depositing the load on the carrier, and finally a second step of retraction of the lateral faces of the sheath on the load by vertical displacement from bottom to top of the furnace frame.
  • the horizontal transfer of the load from the upstream station to the retraction, and the retraction station to the downstream station, is usually provided by a roller conveyor, or with handling chains.
  • the lifting movement of the palletised load allowing the forced folding of the film under the lower plane of installation of the support pallet is generally provided by a actuating mechanism actuated by cylinders pneumatic or hydraulic.
  • Support elements adapted to the dimensions and shape of the pallet are arranged between the boards of the laying plane, commonly called skis, so as not to interfere with the return to the inside of the film over a distance of 100 the entire perimeter of the support pallet.
  • the film can be sucked to the center of the pallet, for example as quoted in EP-A-133462, and facilitate this conformation for some applications.
  • the pallet is then rested on the transporter, the overflowing part the film is then pinched between the chains or rolls of the carrier, and the lower boards or skis from the support pallet.
  • This pinch allows, during and after the retraction of the lateral and upper faces of the sheath onto the palletized load, to increase the shrink resistance of the packaging cover, and to optimize the cohesion loads during cooling.
  • the invention aims to remedy the three aforementioned drawbacks, and consists to realize a handling device now load in his plan of transfer, without level change during retraction and conformation of the film under the pallet.
  • the folding means comprise a fan associated with a suction duct telescope located between the operating pads, said sheath being arranged to direct the hot air in a substantially constant direction, urging the end bottom of the film sucked under the sleepers of the pallet.
  • the actuating members are formed by cams mounted on at least one shaft rotated by a motor.
  • the shaft can be coupled directly to the engine, or via a chain Kinematic transmission.
  • the engine comprises inversion means the direction of rotation, so as to blow the air towards an internal surface to unfold the sheath and move it away from the pallet when the motor rotates in one direction of rotation predetermined, then to create a depression inside the sheath to conform the lower end of said sheath under the sleepers when the engine is running in the opposite direction in the retraction phase.
  • the telescopic sheath is formed by a first fixed skirt of the fan attached to the frame of the transfer chains, and a second mobile skirt in connection with the maneuvering pads.
  • the second cylindrical skirt has a diameter greater than that of the first skirt, and is mounted coaxially with it.
  • the depression inside the sheath is obtained by means of a first suction when the support frame of the furnace is moved down towards the lower end of the sheath, and a second suction more stronger than the first during the retraction phase of said end.
  • the start of the first suction advantageously precedes the heating phase for the retraction of said end of the sheath.
  • the palletized load 1 is based on a support pallet 2 of wood or plastic.
  • Transfer chains 3 are carried by rails integral with each other, and constituting the chassis 4 of the chains 3.
  • This assembly is supported by means of pebbles 5, out of four 7 drive cams connected two by two to two drive shafts 6 parallel, which are positioned symmetrically along the length of the table being connected to a motor 8 directly at the end of the shaft, or via a transmission channel.
  • the rollers 5 are positioned in this phase on the part high cams 7, that is to say on a sector of large diameter of this cam.
  • the heat-shrinkable cover 17 is placed on the load, and the lower edge rests on the chains 3.
  • a fan 14 integral with the chassis 4 of the transfer chains 3 is implanted between the four pads 9 of maneuver, and has a first skirt vertical 15 also attached to said frame.
  • a second cylindrical skirt 16 having a diameter slightly greater than that of the first skirt 15, is fixed on the frame of the studs 9, and moves with them vertically.
  • the second skirt 16 is mounted coaxially on the first skirt 15 forming a telescopic sheath.
  • Figure 2 shows the phase prior to the retraction of the part lower the sheath 17.
  • the air sucked by the fan 14 towards the inside of the cover 17, is blown into the annular space between the top of the second skirt 16 and the floor 10 of the pallet 2.
  • the air flow is directed against the inner surface of the sheath retractable 17, and away from the pallet 2.
  • the sheath 17 is thus released from any attachment point, and unfolds by falling down.
  • the duct section required for conformation under the skis 11 of the pallet 2 is usable in its entirety.
  • a hot air generator 18 is mounted on the frame, which descends vertically along the sheath (see arrow F1).
  • the fan 14 then turns in the opposite direction at low speed to cause a first aspiration intended to bring the film closer to the load 1 and avoid any skim effect that would caused by a subsequent entry of hot air under the sheath 17.
  • the air generator hot 18 is not in use during this downward movement along F1.
  • Figure 3 represents the first step of retraction of the part bottom of the sheath 17.
  • the hot air generator 18 operates and sends the hot air against the lower end of the sheath 17 to the bring to its retraction temperature.
  • the film of the sheath 17 is sucked towards the center of the table in a direction d (d 'for the symmetrical part of the machine).
  • the suction direction d or of the film is substantially horizontal.
  • the fan motor 14 rotates in the same direction, but at a higher speed than that of Figure 2a, so as to create a strong depression inside the cover. This second aspiration is more strong than the first aspiration.
  • FIG. 4 represents the entire device at the instant preceding the contact between chains 3, film 17 and skis 11.
  • FIG. 5 represents the second step of retraction of the faces side of the sheath 17 against the load.
  • the hot air generator 18 is moving vertically from bottom to top (arrow F2), the film 17 being pinched under the skis 11 of the pallet 2.
  • the plots 9 maneuver are moved under the plane of the chains of transfer 3 to allow the subsequent evacuation of the packaged load.
  • the pads 19 are supported by means of rollers 12, with the small diameter portion 13.
  • the motor 8 may have meanings of identical or inverted rotation.

Landscapes

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

Description

Domaine technique de l'inventionTechnical field of the invention

L'invention est relative à un dispositif de manutention pour la pose d'une gaine plastique thermorétractable sur une charge palettisée, et comprenant :

  • des moyens de mise en place de la gaine souple d'emballage sur la charge posée sur la palette support,
  • des moyens de repliement par aspiration de l'extrémité inférieure de la gaine sous le plan de pose de la palette support,
  • et des moyens de rétraction par émission d'air chaud vers la surface latérale de la gaine à rétracter.
The invention relates to a handling device for laying a heat-shrinkable plastic sheath on a palletised load, and comprising:
  • means for placing the flexible packaging sheath on the load placed on the support pallet,
  • suction refolding means of the lower end of the sheath under the laying plane of the support pallet,
  • and means of retraction by emission of hot air to the lateral surface of the sheath to retract.

Etat de la techniqueState of the art

Le cycle de rétraction utilisé dans les machines de manutention connues, comporte successivement une première étape de transfert de la charge sous le poste de houssage, une deuxième étape de transfert sous le poste de rétraction, une étape d'élévation de la charge permettant à la gaine souple de descendre plus bas que le niveau inférieur de la palette support, une première étape de rétraction de la partie basse débordante de la gaine, une étape d'aspiration de cette partie débordante de 10 à 20 cm sous le plan inférieur de la palette, une étape de dépose de la charge sur le transporteur, et enfin une deuxième étape de rétraction des faces latérales de la gaine sur la charge par déplacement vertical de bas en haut du cadre générateur d'air chaud.The retraction cycle used in material handling machines known, successively comprises a first step of transferring the load under the stuffing station, a second transfer step under the retraction station, a step of raising the load allowing the flexible sheath to go lower than the lower level of the support pallet, a first step of retraction of the part low overflowing the sheath, a suction stage of this part overflowing from 10 to 20 cm below the lower plane of the pallet, a step of depositing the load on the carrier, and finally a second step of retraction of the lateral faces of the sheath on the load by vertical displacement from bottom to top of the furnace frame.

Le transfert horizontal de la charge du poste amont vers le poste de rétraction, et du poste de rétraction vers le poste aval, est généralement assuré par un transporteur à rouleaux, ou avec des chaínes de manutention.The horizontal transfer of the load from the upstream station to the retraction, and the retraction station to the downstream station, is usually provided by a roller conveyor, or with handling chains.

Pendant la première étape de rétraction de la partie inférieure de la gaine plastique, le mouvement d'élévation de la charge palettisée permettant le repliement forcé du film sous le plan inférieur de pose de la palette support, est généralement assuré par un mécanisme de manoeuvre actionné par des vérins pneumatiques ou hydrauliques.During the first step of retraction of the lower part of the plastic sheath, the lifting movement of the palletised load allowing the forced folding of the film under the lower plane of installation of the support pallet, is generally provided by a actuating mechanism actuated by cylinders pneumatic or hydraulic.

Des éléments supports adaptés aux dimensions et à la forme de la palette, sont agencés entre les planches du plan de pose, communément appelés skis, de façon à ne pas gêner le retour vers l'intérieur du film sur une centaine distance, et sur tout le périmètre de la palette support.Support elements adapted to the dimensions and shape of the pallet, are arranged between the boards of the laying plane, commonly called skis, so as not to interfere with the return to the inside of the film over a distance of 100 the entire perimeter of the support pallet.

Pendant cette première étape de rétraction, le film peut être aspiré vers le centre de la palette, par exemple comme cité dans le document EP-A-133462, et faciliter cette conformation pour certaines applications.During this first step of retraction, the film can be sucked to the center of the pallet, for example as quoted in EP-A-133462, and facilitate this conformation for some applications.

La palette est ensuite reposée sur le transporteur, la partie débordante du film étant alors pincée entre les chaínes ou les rouleaux du transporteur, et les planches inférieures ou skis de la palette support. Ce pincement permet, pendant et après la rétraction des faces latérales et supérieure de la gaine sur la charge palettisée, d'augmenter la résistance au retrait de la housse d'emballage, et d'optimiser la cohésion de charges lors du refroidissement.The pallet is then rested on the transporter, the overflowing part the film is then pinched between the chains or rolls of the carrier, and the lower boards or skis from the support pallet. This pinch allows, during and after the retraction of the lateral and upper faces of the sheath onto the palletized load, to increase the shrink resistance of the packaging cover, and to optimize the cohesion loads during cooling.

Cependant, il est nécessaire d'effectuer rapidement un changement de niveau de la charge pour obtenir une bonne fiabilité de la conformation du film dans sa phase de rétraction. However, it is necessary to quickly make a change of level of charge to obtain a good reliability of the conformation of the film in its retraction phase.

Un tel changement de niveau est opéré couramment avec des tables élévatrices, par exemple du type pantographe (voir EP-A-133462), mais plusieurs difficultés sont cependant mal maítrisées avec le matériel connu :

  • a) Un premier inconvénient peut intervenir lors de l'opération de soulèvement de la charge palettisée. La charge est portée par les plots de la table en contact avec les planches supérieures de la palette en bois, et tout le poids de la charge, pouvant être de l'ordre de deux tonnes, est alors supporté par deux ou trois planches de la palette, sollicitant fortement leur clouage à l'arrachement. Les mouvements d'accélération et de décélération intervenant lors de cette manoeuvre rapide, ainsi que les à-coups des organes de motorisations du mécanisme, augmentent encore les sollicitations de la palette.Les palettes pouvant être soit de réalisation économique du type perdu, soit consignées avec plusieurs dizaines de transferts clients-fournisseurs ayant altéré leur résistance mécanique, il arrive fréquemment que les charges soient déstabilisées à la suite d'un déclouage ou d'une rupture de l'une des planches. Les charges peuvent alors basculer dans la machine lors de l'opération de soulèvement.Des systèmes de contrôle coûteux peuvent être fournis pour prévenir cet incident , mais ils nécessitent une intervention d'un opérateur , et ils freinent la production.
  • b) La gaine plastique est généralement positionnée sur la charge au poste précédent la machine de rétraction, et une soudure horizontale ferme cette gaine au niveau du sommet de la charge de manière à constituer une housse étanche. La housse est sensiblement plus haute que la charge de façon à réserver en partie inférieure, la conformation de matière sous la palette support. En fin d'étape de houssage et lors du transfert vers la machine de rétraction, la surlongueur de gaine repose sur la table de manutention, plus généralement sur les chaínes de transfert. Le film est alors naturellement plissé dans cette portion de circonférence.Dans l'étape de soulèvement de la charge pour effectuer la rétraction de la partie inférieure de la gaine, celle-ci doit nécessairement descendre d'une distance de 15 à 20 cm au dessous du plan de pose de la palette afin d'assurer un bon accrochage des skis . Il arrive très souvent que les plis formés par le film, et leur frottement contre les plots de la palette support, maintiennent cette partie de la gaine au dessus du plan de pose pendant la rétraction, entraínant le deuxième inconvénient d'un mauvais accrochage sous les skis .
  • c) Comme évoqué précédemment, pour favoriser le retour du film sous le plan de pose de la palette, le film peut être aspiré horizontalement en direction du centre de la palette tout ou partie du temps de rétraction de cette partie de film. Cette opération peut être réalisée soit par un dispositif d'aspiration placé généralement sous la table ( du type décrit dans le document EP-A-133462), soit avec un mécanisme moteur extérieur aspirant l'air dans une gaine de liaison.Pour obtenir une bonne conformation du film sous la palette bois, il est nécessaire de maintenir l'orientation de la partie aspirée du film dans une direction constante pendant toute la phase de rétraction avant le pincement entre les skis et le transporteur. Or le dispositif d'aspiration est nécessairement solidaire du châssis transporteur pour garder une continuité de son plan de pose. Il se déplace donc verticalement avec ce châssis, et l'orientation du film aspiré n'est donc pas maintenu constante. Ce troisième inconvénient influence la bonne conformation du film.
    • Such level change is commonly done with lift tables, for example of the pantograph type (see EP-A-133462), but several difficulties are however poorly controlled with known equipment:
  • a) A first disadvantage may occur during the lifting operation of the palletised load. The load is carried by the pads of the table in contact with the upper boards of the wooden pallet, and the entire weight of the load, which can be of the order of two tons, is then supported by two or three boards of the pallet, strongly urging their nailing on tearing. The accelerating and decelerating movements occurring during this rapid maneuver, as well as the jerks of the mechanism's drive members, further increase the stresses on the pallet. The pallets can be either of economic production of the lost type, or are recorded. with several dozens of customer-supplier transfers having altered their mechanical strength, it frequently happens that the loads are destabilized as a result of a stripping or breaking of one of the boards. The loads can then tilt into the machine during the lifting operation. Costly control systems can be provided to prevent this incident, but they require operator intervention, and they hinder production.
  • b) The plastic sheath is generally positioned on the load at the post before the retraction machine, and a horizontal weld closes the sheath at the top of the load so as to constitute a waterproof cover. The cover is substantially higher than the load so as to reserve in the lower part, the material conformation under the support pallet. At the end of the shaping step and during the transfer to the shrinkage machine, the over-length of sheath rests on the handling table, more generally on the transfer lines. The film is then naturally folded in this portion of circumference. In the step of lifting the load to effect the retraction of the lower part of the sheath, it must necessarily descend from a distance of 15 to 20 cm below the plan of installation of the pallet to ensure a good attachment of the skis. It very often happens that the folds formed by the film, and their friction against the pads of the support pallet, maintain this part of the sheath above the laying plane during the retraction, causing the second disadvantage of a bad snagging under them. skis.
  • c) As mentioned above, to promote the return of the film under the pallet laying plane, the film can be drawn horizontally towards the center of the pallet all or part of the retraction time of this portion of film. This operation can be performed either by a suction device placed generally under the table (of the type described in EP-A-133462), or with an external motor mechanism sucking air into a connecting sheath. good conformation of the film under the wooden pallet, it is necessary to maintain the orientation of the sucked portion of the film in a constant direction during the entire retraction phase before the pinch between the skis and the carrier. Or the suction device is necessarily integral with the carrier frame to keep a continuity of its laying plan. It moves so vertically with this frame, and the orientation of the film sucked is not kept constant. This third disadvantage influences the good conformation of the film.

    • Objet de l'inventionObject of the invention

    L'invention vise à remédier aux trois inconvénients précités, et consiste à réaliser un dispositif de manutention maintenant la charge dans son plan de transfert, sans changement de niveau pendant la rétraction et la conformation du film sous la palette.The invention aims to remedy the three aforementioned drawbacks, and consists to realize a handling device now load in his plan of transfer, without level change during retraction and conformation of the film under the pallet.

    Le dispositif selon l'invention est caractérisé en ce qu'il comporte :

    • un premier jeu d'organes d'actionnement coopérant avec des chaínes de transfert mobiles placées sous les traverses de la palette support,
    • un deuxième jeu d'organes d'actionnement coopérant avec des plots de manoeuvre disposés dans l'intervalle ménagé entre les chaínes de transfert, et destinés à venir en appui contre la surface inférieure des planches de la palette sans interférer avec les traverses longitudinales et/ou transversales,
       et un mécanisme de commande des deux jeux d'organes d'actionnement pour maintenir les chaínes de transfert contre les traverses lorsque les plots de manoeuvre sont écartés des planches de la palette, et réciproquement pour maintenir les plots de manoeuvre contre lesdites planches en position écartée des chaínes de transfert, autorisant l'aspiration de l'extrémité inférieure de la gaine sous les traverses sans modifier le positionnement de la charge dans la direction verticale.The device according to the invention is characterized in that it comprises:
    • a first set of actuating members cooperating with mobile transfer chains placed under the crosspieces of the support pallet,
    • a second set of actuating members cooperating with actuating studs arranged in the gap formed between the transfer chains, and intended to abut against the lower surface of the planks of the pallet without interfering with the longitudinal struts and / or transverse,
    and a mechanism for controlling the two sets of actuating members to hold the transfer chains against the sleepers when the maneuvering pads are spaced from the boards of the pallet, and vice versa to hold the maneuvering pads against said boards in the remote position transfer chains, allowing suction of the lower end of the sheath under the sleepers without changing the positioning of the load in the vertical direction.

    Les moyens de repliement comportent un ventilateur associé à une gaine d'aspiration téléscopique située entre les plots de manoeuvre, ladite gaine étant agencée pour diriger l'air chaud selon une direction sensiblement constante, sollicitant l'extrémité inférieure du film aspiré sous les traverses de la palette.The folding means comprise a fan associated with a suction duct telescope located between the operating pads, said sheath being arranged to direct the hot air in a substantially constant direction, urging the end bottom of the film sucked under the sleepers of the pallet.

    Il permet ainsi de transmettre aux planches de la palette, des efforts de poussée verticale, limités pour leur totalité au seul poids de la charge palettisée, et de maintenir le film aspiré dans une direction constante, avec un maximum d'efficacité pour positionner le film sous les traverses ou skis.It thus makes it possible to transmit to the boards of the pallet, thrust forces all of which are limited solely to the weight of the palletised load, and keep the film sucked in a constant direction, with maximum efficiency to position the film under sleepers or skis.

    Selon un mode de réalisation préférentiel, les organes d'actionnement sont formés par des cames montées sur au moins un arbre entraíné en rotation par un moteur. L'arbre peut être accouplé directement au moteur, ou par l'intermédiaire d'une chaíne cinématique de transmission.According to a preferred embodiment, the actuating members are formed by cams mounted on at least one shaft rotated by a motor. The shaft can be coupled directly to the engine, or via a chain Kinematic transmission.

    Selon une caractéristique de l'invention, le moteur comporte des moyens d'inversion du sens de rotation, de manière à souffler l'air vers une surface interne pour déplisser la gaine et l'écarter de la palette lorsque le moteur tourne dans un sens de rotation prédéterminé, puis à créer une dépression à l'intérieur de la gaine pour conformer l'extrémité inférieure de ladite gaine sous les traverses lorsque le moteur tourne dans le sens inverse en phase de rétraction.According to one characteristic of the invention, the engine comprises inversion means the direction of rotation, so as to blow the air towards an internal surface to unfold the sheath and move it away from the pallet when the motor rotates in one direction of rotation predetermined, then to create a depression inside the sheath to conform the lower end of said sheath under the sleepers when the engine is running in the opposite direction in the retraction phase.

    Préférentiellement, la gaine téléscopique est formée par une première jupe fixe du ventilateur assujetti au châssis des chaínes de transfert, et une deuxième jupe mobile en liaison avec les plots de manoeuvre. La deuxième jupe cylindrique possède un diamètre supérieur à celui de la première jupe, et est monté coaxialement avec elle.Preferably, the telescopic sheath is formed by a first fixed skirt of the fan attached to the frame of the transfer chains, and a second mobile skirt in connection with the maneuvering pads. The second cylindrical skirt has a diameter greater than that of the first skirt, and is mounted coaxially with it.

    La dépression à l'intérieur de la gaine est obtenue au moyen d'une première aspiration lorsque le cadre support du générateur d'air chaud est déplacé vers le bas en direction de l'extrémité inférieure de la gaine, et d'une deuxième aspiration plus forte que la première pendant la phase de rétraction de ladite extrémité. Le début de la première aspiration précède avantageusement la phase de chauffage pour la rétraction de la dite extrémité de la gaine.The depression inside the sheath is obtained by means of a first suction when the support frame of the furnace is moved down towards the lower end of the sheath, and a second suction more stronger than the first during the retraction phase of said end. The start of the first suction advantageously precedes the heating phase for the retraction of said end of the sheath.

    Description sommaire des dessinsBrief description of the drawings

    D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre d'un mode de réalisation de l'invention, donné à titre d'exemple non limitatif et représenté aux dessins annexés dans lesquels :

    • la figure 1 représente une vue schématique en coupe transversale d'un dispositif de manutention selon l'invention, dans sa position initiale lors de l'arrivée de la charge dans la machine, la gaine plastique étant déjà enfilée sur la charge ;
    • la figure 2 est une vue identique de la figure 1 lorsque la machine se trouve dans la position qui précède la rétraction du film en partie inférieure de la gaine lors du déplissage de cette dernière ;
    • la figure 2bis est une vue identique de la figure 2 lors de la descente du cadre vers l'extrémité inférieure de la gaine ;
    • les figures 3 et 4 sont des vue identiques de la figure 1 lorsque la machine se trouve dans la phase de rétraction et d'aspiration de l'extrémité du film sous les traverses de la palette ;
    • la figure 5 est une vue identique de la figure 1 lorsque la machine se trouve dans la position finale de rétraction des faces latérales et de l'évacuation de la charge palettisée emballée.
    Other advantages and features will emerge more clearly from the following description of an embodiment of the invention, given by way of non-limiting example and represented in the accompanying drawings, in which:
    • Figure 1 shows a schematic cross-sectional view of a handling device according to the invention, in its initial position when the load arrives in the machine, the plastic sheath already being threaded on the load;
    • Figure 2 is an identical view of Figure 1 when the machine is in the position that precedes the shrinkage of the film in the lower part of the sheath during the unfolding of the latter;
    • Figure 2bis is an identical view of Figure 2 during the descent of the frame towards the lower end of the sheath;
    • FIGS. 3 and 4 are identical views of FIG. 1 when the machine is in the retraction and suction phase of the end of the film under the crosspieces of the pallet;
    • Figure 5 is an identical view of Figure 1 when the machine is in the final retracted position of the side faces and the discharge of the packaged pallet load.

    Description d'un mode de réalisation préférentielDescription of a preferred embodiment

    Sur la figure 1, la charge palettisée 1 repose sur une palette support 2 en bois ou en plastique. Des chaínes de transfert 3 sont portées par des longerons solidaires entre eux, et constituant le châssis 4 des chaínes 3. In Figure 1, the palletized load 1 is based on a support pallet 2 of wood or plastic. Transfer chains 3 are carried by rails integral with each other, and constituting the chassis 4 of the chains 3.

    Cet ensemble prend appui par l'intermédiaire de galets 5, sur quatre cames 7 d'entraínement connectées deux par deux à deux arbres 6 de commande parallèles, lesquels sont positionnés symétriquement sur la longueur de la table en étant reliés à un moteur 8 directement en bout d'arbre, ou par l'intermédiaire d'une chaíne de transmission. Les galets 5 sont positionnés dans cette phase sur la partie haute des cames 7, c' est à dire sur un secteur de grand diamètre de cette came.This assembly is supported by means of pebbles 5, out of four 7 drive cams connected two by two to two drive shafts 6 parallel, which are positioned symmetrically along the length of the table being connected to a motor 8 directly at the end of the shaft, or via a transmission channel. The rollers 5 are positioned in this phase on the part high cams 7, that is to say on a sector of large diameter of this cam.

    Pendant le transfert, la housse thermorétractable 17 est placée sur la charge, et le bord inférieur repose sur les chaínes 3.During the transfer, the heat-shrinkable cover 17 is placed on the load, and the lower edge rests on the chains 3.

    Quatre plots 9 de manoeuvre solidaires mécaniquement entre eux, sont disposés entre les chaínes de transfert 4, de manière à s'appuyer contre les planches 10 de la palette 2 lors de leur déplacement vertical, sans être gênés par les traverses longitudinales et/ou transversales ou skis 11 de la palette 2. Les plots 9 reposent également par l'intermédiaire de quatre galets 12 sur quatre cames 13 de commande disposées deux par deux sur les deux arbres 6. Dans cette étape, les galets 12 sont immobilisés sur le point le plus bas des cames 13 de commande.Four blocks 9 maneuvering mechanically together, are arranged between the transfer chains 4, so as to lean against the boards 10 of the pallet 2 during their vertical movement, without being hampered by the sleepers longitudinal and / or transverse or skis 11 of the pallet 2. The studs 9 rest also via four rollers 12 on four control cams 13 arranged in pairs on the two shafts 6. In this step, the rollers 12 are immobilized on the lowest point of the control cams 13.

    Un ventilateur 14 solidaire du châssis 4 des chaínes de transfert 3 est implanté entre les quatre plots 9 de manoeuvre, et comporte une première jupe verticale 15 fixée également sur ledit châssis. Une deuxième jupe 16 cylindrique ayant un diamètre légèrement supérieur à celui de la première jupe 15, est fixée sur le châssis des plots 9, et se déplace avec eux verticalement. La deuxième jupe 16 est montée coaxialement sur la première jupe 15 en formant une gaine téléscopique.A fan 14 integral with the chassis 4 of the transfer chains 3 is implanted between the four pads 9 of maneuver, and has a first skirt vertical 15 also attached to said frame. A second cylindrical skirt 16 having a diameter slightly greater than that of the first skirt 15, is fixed on the frame of the studs 9, and moves with them vertically. The second skirt 16 is mounted coaxially on the first skirt 15 forming a telescopic sheath.

    La figure 2 représente la phase préalable à la rétraction de la partie inférieure de la gaine 17. Après la rotation des deux arbres 6 à cames, la charge palettisée repose sur les plots 9 de manoeuvre, et les galets 12 se trouvent en appui sur la partie haute des cames 13. Les chaínes 4 sont abaissées d'une distance de 150 mm environ, et sont en appui sur la partie basse des cames 7.Figure 2 shows the phase prior to the retraction of the part lower the sheath 17. After the rotation of the two camshafts 6, the load palletized rests on the pads 9 of maneuver, and the rollers 12 are in support on the upper part of the cams 13. The chains 4 are lowered by a distance of About 150 mm, and rest on the lower part of the cams 7.

    L'air aspiré par le ventilateur 14 vers l'intérieur de la housse 17, est soufflé dans l'espace annulaire entre le haut de la deuxième jupe 16 et le plancher 10 de la palette 2. L'écoulement d'air est dirigé contre la surface intérieure de la gaine rétractable 17 , et l'éloigne de la palette 2. The air sucked by the fan 14 towards the inside of the cover 17, is blown into the annular space between the top of the second skirt 16 and the floor 10 of the pallet 2. The air flow is directed against the inner surface of the sheath retractable 17, and away from the pallet 2.

    La gaine 17 est ainsi dégagée de tout point d'accrochage, et se déplisse en tombant vers le bas. Le tronçon de gaine nécessaire à la conformation sous les skis 11 de la palette 2 est utilisable dans sa totalité.The sheath 17 is thus released from any attachment point, and unfolds by falling down. The duct section required for conformation under the skis 11 of the pallet 2 is usable in its entirety.

    Sur la figure 2bis, un générateur d'air chaud 18 est monté sur le cadre, lequel descend verticalement le long de la gaine ( voir flèche F1). Le ventilateur 14 tourne alors en sens inverse à petite vitesse pour provoquer une première aspiration destinée à rapprocher le film de la charge 1 et éviter tout effet de jupage qui serait provoqué par une entrée ultérieure d'air chaud sous la gaine 17. Le générateur d'air chaud 18 n'est pas en service durant ce mouvement de descente selon F1.In FIG. 2bis, a hot air generator 18 is mounted on the frame, which descends vertically along the sheath (see arrow F1). The fan 14 then turns in the opposite direction at low speed to cause a first aspiration intended to bring the film closer to the load 1 and avoid any skim effect that would caused by a subsequent entry of hot air under the sheath 17. The air generator hot 18 is not in use during this downward movement along F1.

    La figure 3 représente la première étape de rétraction de la partie inférieure de la gaine 17.Figure 3 represents the first step of retraction of the part bottom of the sheath 17.

    En fin de course de descente du cadre, le générateur d'air chaud 18 fonctionne et envoie l'air chaud contre l'extrémité inférieure de la gaine 17 jusqu'à la porter à sa température de rétraction. Le film de la gaine 17 est aspiré vers le centre de la table selon une direction d ( d' pour la partie symétrique de la machine ). Afin de bien conformer le film 17 sous les skis 11, la direction d'aspiration d ou d 'du film est sensiblement horizontale. Le moteur du ventilateur 14 tourne dans le même sens, mais à plus grande vitesse par rapport à celui de la figure 2bis, de manière à créer une forte dépression à l'intérieur de la housse. Cette deuxième aspiration est plus forte que la première aspiration.At the end of the descent run of the frame, the hot air generator 18 operates and sends the hot air against the lower end of the sheath 17 to the bring to its retraction temperature. The film of the sheath 17 is sucked towards the center of the table in a direction d (d 'for the symmetrical part of the machine). In order to to conform the film 17 under the skis 11, the suction direction d or of the film is substantially horizontal. The fan motor 14 rotates in the same direction, but at a higher speed than that of Figure 2a, so as to create a strong depression inside the cover. This second aspiration is more strong than the first aspiration.

    Après quelques secondes de rétraction dans un mouvement continu de rotation de l'arbre à cames 6, le châssis 4 des chaínes 3 porté par les galets 5 vient progressivement en contact avec le plus grand diamètre des cames 7, et soulève les chaínes 3 jusqu'à la venue en contact des skis 11 de la palette 2, en pinçant le film 17, sans soulever la charge 1.After a few seconds of retraction in a continuous movement of rotation of the camshaft 6, the chassis 4 of the chains 3 carried by the rollers 5 comes gradually in contact with the largest diameter of the cams 7, and raises the chains 3 until the skis 11 come into contact with the pallet 2, by pinching the film 17, without lifting the load 1.

    La figure 4 représente l'ensemble du dispositif à l'instant qui précède le contact entre chaínes 3, film 17 et skis 11. La déformation du film 17 aspiré selon la direction d, est restée identique à celle de l'étape précédente, le flux d'air étant canalisé par la deuxième jupe 16. FIG. 4 represents the entire device at the instant preceding the contact between chains 3, film 17 and skis 11. The deformation of the film 17 sucked according to the direction d, remained identical to that of the previous step, the air flow being channeled by the second skirt 16.

    La figure 5 représente la deuxième étape de rétraction des faces latérales de la gaine 17 contre la charge. Le générateur d'air chaud 18 se déplace verticalement du bas vers le haut ( flèche F2), le film 17 étant pincé sous les skis 11 de la palette 2. Les plots 9 de manoeuvre sont déplacés sous le plan des chaínes de transfert 3 pour permettre l'évacuation ultérieure de la charge emballée. Les plots 19 se trouvent en appui par l'intermédiaire des galets 12, avec la partie de petit diamètre des cames 13. Suivant le tracé des cames 7 et 13, le moteur 8 peut avoir des sens de rotation identiques ou inversés.FIG. 5 represents the second step of retraction of the faces side of the sheath 17 against the load. The hot air generator 18 is moving vertically from bottom to top (arrow F2), the film 17 being pinched under the skis 11 of the pallet 2. The plots 9 maneuver are moved under the plane of the chains of transfer 3 to allow the subsequent evacuation of the packaged load. The pads 19 are supported by means of rollers 12, with the small diameter portion 13. Depending on the layout of the cams 7 and 13, the motor 8 may have meanings of identical or inverted rotation.

    Claims (10)

    1. Handling apparatus for fitting a heat-shrinkable plastic sleeve (17) on a palettized load, and comprising:
      means for placing the flexible packaging sleeve (17) on the load (1) placed on the support palette (2),
      means for folding the bottom end of the sleeve (17) by suction under the plane in which the support palette (2) is placed,
      and means for shrinking by emitting hot air to the lateral surface of the sleeve (17) to be shrunk,
      characterized in that it comprises:
      a first set of actuating means (7) co-operating with moving transfer chains (3) placed under the slats (11) of the support palette (2),
      a second set of actuating means (13) co-operating with handling pads (9) located in the gap arranged between the transfer chains (3), and designed to press against the bottom surface of the planks of the palette (2) without interfering with the longitudinal and/or transverse slats (11),
      and an operating mechanism of the two sets of actuating means (7, 13) to hold the transfer chains (3) against the slats (11) when the handling pads (9) are separated from the planks of the palette (2), and reciprocally to hold the handling pads (9) against said planks in the separated position of the transfer chains (3) allowing the bottom end of the sleeve (17) to be sucked underneath the slats (11) without lifting the load (1) which remains at the same level all the time.
    2. Handling apparatus for fitting a heat-shrinkable plastic sleeve (17) according to claim 1, characterized in that the actuating means (7, 13) are formed by cams fitted on at least one shaft (6) driven in rotation by a motor (8).
    3. Handling apparatus for fitting a heat-shrinkable plastic sleeve (17) according to claim 2, characterized in that the shaft (6) is coupled directly to the motor (8).
    4. Handling apparatus for fitting a heat-shrinkable plastic sleeve (17) according to claim 2, characterized in that the shaft (6) is coupled to the motor (8) by means of a kinematic transmission system.
    5. Handling apparatus for fitting a heat-shrinkable plastic sleeve (17) according to one of the claims 1 to 4, characterized in that the folding means comprise a fan (14) associated with a telescopic suction sleeve situated between the handling pads (9), said sleeve being arranged to direct the hot air in a substantially constant direction, urging the bottom end of the film (17) sucked under the slats (11) of the palette (2).
    6. Handling apparatus for fitting a heat-shrinkable plastic sleeve (17) according to claim 5, characterized in that the telescopic sleeve is formed by a first fixed skirt (15) of the fan (14) securedly affixed to the frame (4) of the transfer chains (3), and a second mobile skirt (16) joined tothe handling pads (9).
    7. Handling apparatus for fitting a heat-shrinkable plastic sleeve (17) according to claim 6, characterized in that the cylindrical second skirt (16) has a larger diameter than that of the first skirt (15) and is mounted coaxially therewith.
    8. Handling apparatus for fitting a heat-shrinkable plastic sleeve (17) according to one of the claims 2 to 7, characterized in that the motor (8) comprises means for reversing the direction of rotation so as to blow the air towards the inside to smooth the sleeve out (17) and separate it from the palette (2) when the motor (8) is running in a predetermined direction, and then to create a negative pressure inside the sleeve (17) to shape the bottom end of said sleeve under the slats (11) when the motor (8) is running in the reverse direction in the heat-shrinking phase.
    9. Handling apparatus for fitting a heat-shrinkable plastic sleeve (17) according to claim 8, characterized in that the negative pressure inside the sleeve (17) is obtained by means of a first suction when the hot air generator support frame is moved downwards in the direction of the bottom end of the sleeve (17), and of a second suction, stronger than the first one, during the shrinking phase of said end.
    10. Handling apparatus for fitting a heat-shrinkable plastic sleeve (17) according to claim 8 or 9, characterized in that the beginning of the first suction precedes the heating phase for shrinking of said end of the sleeve (17).
    EP20000410041 1999-04-26 2000-04-26 Apparatus for packaging a palettized load by means of a heat shrinkable sleeve Expired - Lifetime EP1048571B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR9905415A FR2792609B1 (en) 1999-04-26 1999-04-26 HANDLING DEVICE FOR LAYING A HEAT SHRINKABLE PLASTIC SHEATH ON A PALLETIZED LOAD
    FR9905415 1999-04-26

    Publications (2)

    Publication Number Publication Date
    EP1048571A1 EP1048571A1 (en) 2000-11-02
    EP1048571B1 true EP1048571B1 (en) 2004-03-03

    Family

    ID=9544999

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP20000410041 Expired - Lifetime EP1048571B1 (en) 1999-04-26 2000-04-26 Apparatus for packaging a palettized load by means of a heat shrinkable sleeve

    Country Status (4)

    Country Link
    EP (1) EP1048571B1 (en)
    DE (1) DE60008618D1 (en)
    ES (1) ES2215593T3 (en)
    FR (1) FR2792609B1 (en)

    Families Citing this family (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    CN111114872A (en) * 2018-11-01 2020-05-08 浙江彩创包装材料科技有限公司 Auxiliary device for enveloping bottle bottom
    CN110834771A (en) * 2019-11-22 2020-02-25 安徽永锋智能包装科技有限公司 Bottom-closing method for transparent packaging bag of refrigerator
    CN110745306A (en) * 2019-11-22 2020-02-04 安徽永锋智能包装科技有限公司 Refrigerator packing bottom-closing equipment
    CN115444020A (en) * 2022-09-28 2022-12-09 江苏中大新材料科技有限公司 Shrinking device and shrinking process for heat shrinkable film

    Family Cites Families (5)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE3327996A1 (en) 1983-08-03 1985-02-14 MSK - Verpackungs-Systeme GmbH, 4190 Kleve METHOD FOR PACKING PALLETIZED GOODS STACKS AND DEVICE FOR CARRYING OUT THIS METHOD
    DE59207271D1 (en) * 1992-12-04 1996-10-31 Erapa Ceka Maschbau Method and device for packaging in particular stacked goods with a heat-shrinkable film envelope
    DE4423513C1 (en) * 1993-10-26 1996-02-01 Moellers Maschf Gmbh Device for shrinking a shrink film hood
    FR2719019B1 (en) * 1994-04-22 1996-05-31 Newtec Int Method for packaging a load using a heat-shrinkable sheath and packaging machine using such a method.
    FR2723564B1 (en) * 1994-08-12 1996-09-20 Newtec Int PROCESS AND DEVICE FOR OVERPACKING, BY THERMO-RETRACTION, OF A PALLETIZED LOAD

    Also Published As

    Publication number Publication date
    DE60008618D1 (en) 2004-04-08
    EP1048571A1 (en) 2000-11-02
    FR2792609B1 (en) 2001-07-13
    ES2215593T3 (en) 2004-10-16
    FR2792609A1 (en) 2000-10-27

    Similar Documents

    Publication Publication Date Title
    FR2681311A1 (en) METHOD FOR CONDITIONING A PALLETIZING LOAD AND INSTALLATION FOR IMPLEMENTING SAID METHOD
    EP0630813A1 (en) Device for handling and holding the free end of a film in a streamer machine
    EP0389378B1 (en) Vehicle loading platform and method of using same
    EP1048571B1 (en) Apparatus for packaging a palettized load by means of a heat shrinkable sleeve
    FR2730697A1 (en) Automatic packaging system for filling of containers with superposed layers of fruits esp. oranges
    FR3029184B1 (en) TRANSPORT TROLLEY FOR A BELT CONVEYOR, MOBILE CONVEYING INSTALLATION COMPRISING SUCH A CARRIAGE, AND METHOD OF DISPLACING THE SAME
    EP0249562B1 (en) Method and device for removing a hood from a pallet and unloading the same
    EP0188987B1 (en) Palettizer, in particular for bag parcels
    EP0177413B1 (en) Method and machine for automatically banding a load with a plastic film strip
    JPH0826485A (en) Tire transferring device and method
    FR2575735A1 (en) Device for stacking blanks
    FR2926287A1 (en) Packaging device e.g. gantry robot, for e.g. placing quantity of case on sliding vane, has set of positioning devices arranged to allow placing objects on support elements or object layer in upper part of frame
    EP0249534B1 (en) Method and apparatus for packaging a palletized load in a film of heat-shrinkable plastic material
    EP1950134A1 (en) Device for stretch-wrapping a parcel
    EP0070549B1 (en) Apparatus for continuously wrapping a palletized load with a stretch cling-film
    EP1354831A1 (en) Pallet loading tower
    EP1419966B1 (en) Method and apparatus for applying a packaging hood of stretch foil on a palettized load
    EP2493714B1 (en) Device for automatically unwinding and winding up a tarpaulin
    FR2587311A1 (en) Method and installation for automatic handling and temporary storage of stacked packets of semi-finished sheet products
    BE1004327A7 (en) Gerbeur fork.
    EP1486420B1 (en) Method and apparatus for packaging a load with a flexible heatshrinkable foil.
    FR2728147A1 (en) Telescopic table for unloading lorry
    FR2948922A1 (en) Products i.e. parallelepipedic shaped window joinery works, packing installation, has conveying device for conveying products on edge along conveying direction, and movable module moving between active position and isolated position
    EP1445197A1 (en) Apparatus and method for applying a packaging hood of heat-shrinkable foil on a palettised load
    EP1331168A1 (en) Method and apparatus for wrapping a palettised load with a sleeve of stretch foil

    Legal Events

    Date Code Title Description
    PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

    Free format text: ORIGINAL CODE: 0009012

    AK Designated contracting states

    Kind code of ref document: A1

    Designated state(s): DE DK ES GB IT NL

    AX Request for extension of the european patent

    Free format text: AL;LT;LV;MK;RO;SI

    17P Request for examination filed

    Effective date: 20010420

    AKX Designation fees paid

    Free format text: DE DK ES GB IT NL

    RAP1 Party data changed (applicant data changed or rights of an application transferred)

    Owner name: THIMON

    GRAP Despatch of communication of intention to grant a patent

    Free format text: ORIGINAL CODE: EPIDOSNIGR1

    GRAS Grant fee paid

    Free format text: ORIGINAL CODE: EPIDOSNIGR3

    GRAA (expected) grant

    Free format text: ORIGINAL CODE: 0009210

    AK Designated contracting states

    Kind code of ref document: B1

    Designated state(s): DE DK ES GB IT NL

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: NL

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20040303

    Ref country code: GB

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20040303

    REG Reference to a national code

    Ref country code: GB

    Ref legal event code: FG4D

    Free format text: NOT ENGLISH

    REF Corresponds to:

    Ref document number: 60008618

    Country of ref document: DE

    Date of ref document: 20040408

    Kind code of ref document: P

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: DK

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20040603

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: DE

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20040604

    NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
    GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

    Effective date: 20040303

    REG Reference to a national code

    Ref country code: ES

    Ref legal event code: FG2A

    Ref document number: 2215593

    Country of ref document: ES

    Kind code of ref document: T3

    PLBE No opposition filed within time limit

    Free format text: ORIGINAL CODE: 0009261

    STAA Information on the status of an ep patent application or granted ep patent

    Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

    26N No opposition filed

    Effective date: 20041206

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: ES

    Payment date: 20170317

    Year of fee payment: 18

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: IT

    Payment date: 20170420

    Year of fee payment: 18

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: IT

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20180426

    REG Reference to a national code

    Ref country code: ES

    Ref legal event code: FD2A

    Effective date: 20190912

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: ES

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20180427