EP2363281B1 - Machine and method for lining packing boxes with plastic bags - Google Patents

Machine and method for lining packing boxes with plastic bags Download PDF

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Publication number
EP2363281B1
EP2363281B1 EP10290110.5A EP10290110A EP2363281B1 EP 2363281 B1 EP2363281 B1 EP 2363281B1 EP 10290110 A EP10290110 A EP 10290110A EP 2363281 B1 EP2363281 B1 EP 2363281B1
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EP
European Patent Office
Prior art keywords
bag
carton
bags
plate
grasping
Prior art date
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Active
Application number
EP10290110.5A
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German (de)
French (fr)
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EP2363281A1 (en
Inventor
Stephane Vieira
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.)
GJ Nieuwenhuis Holding BV
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GJ Nieuwenhuis Holding BV
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Priority to EP10290110.5A priority Critical patent/EP2363281B1/en
Publication of EP2363281A1 publication Critical patent/EP2363281A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/74—Auxiliary operations
    • B31B50/742—Coating; Impregnating; Waterproofing; Decoating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2105/00—Rigid or semi-rigid containers made by assembling separate sheets, blanks or webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2120/00—Construction of rigid or semi-rigid containers
    • B31B2120/40—Construction of rigid or semi-rigid containers lined or internally reinforced
    • B31B2120/402—Construction of rigid or semi-rigid containers lined or internally reinforced by applying a liner to already made boxes, e.g. opening or distending of the liner or the box
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/02—Feeding or positioning sheets, blanks or webs

Definitions

  • the invention relates to the field of packaging. It relates more specifically to equipment for the implementation of bags from lining the inner walls of packaging cartons in an automated product packaging chain. It is understood that the generic term "cartons" will denote in the following any type of container capable of receiving products and whose inner walls are able to receive in lining bags intended, for example, to protect packaged products, which it is cardboard strictly speaking, or trays for example made of plastic, wood, or light metal, solid walls or clear. Such equipment is known from the document JP 100 86246 .
  • Bags intended to come lining the internal walls of such containers are usually made of plastic film, for resistance and sealing issues.
  • the bags are initially presented stacked one behind the other on support rods to which they are suspended. They are threaded on these rods by eyelets they have for this purpose in the vicinity of their upper edge.
  • the stems are typically two in number. Going through the eyelets of the different bags, they are engaged through all the wall thicknesses of a stack of a predefined number of bags.
  • the present invention aims at providing a machine for lining packaging cartons with stored stacked bags, a machine that can implement simple bags and at a reduced cost, while optimizing the available volume within each carton intended to receive the products to be packaged for optimal packaging of said products.
  • a machine comprises a device for gripping and disengaging the bags which is articulated and which combines means of horizontal displacement and vertical sliding means for perform two successive movements: a first translational movement, of low amplitude, in a direction parallel to the stacking direction of the bags on the support rods, and a second translational movement perpendicular to the same direction. This movement is advantageously directed towards the carton in which the bag is to be inserted.
  • the machine according to the invention also includes means for automatically conveying cartons to a bag insertion station that it comprises.
  • these automatic routing means may be in the form of a conveyor on which the cartons are driven one by one to scroll to the bag insertion station.
  • the latter comprises means for detecting the presence of a cardboard ready to receive a bag, and means for transmitting the presence information of such a cardboard to a control unit which then automatically controls, on the one hand , stopping the conveyor on which the cartons scroll, and, on the other hand, the movements of the bag gripping device.
  • the first translational movement effected by the articulated gripping device results from an aspiration, by means in itself conventional that said gripping device comprises, from the front sheet of the bag to be gripped, and the second translational movement is induced by the displacement of the articulated gripping device in a direction perpendicular to the stacking direction of the bags on the support rods.
  • the second movement is preferably directed to the carton in which the bag is to be put in place.
  • the articulated gripping device operates a movement which leads said front sheet of said rubbing bag against the back sheet of the same bag to separate these two sheets from one another to open the bag, similar to the movement between two fingers by a person wishing to separate the two sheets of a plastic bag to open the latter.
  • the front sheet of the sacked bag is naturally torn off the support rods, without it being necessary to previously arrange on this sheet any area of weakness other than that which naturally constitute the eyelets for hanging from the bag to the support rods.
  • the machine according to the invention also comprises, according to another of its characteristics, a shaper which is controlled to move, on the one hand, for pressing the outer walls of the bag against the inner walls of the cardboard, and, on the other hand, to fold against the upper part of the outer faces of this cardboard the upper part of the outer walls of said bag.
  • the height of the bags is, in fact, advantageously previously determined to be substantially greater than the depth of the cartons, so as to facilitate subsequent filling operations by products to be packaged, as well as the operations of sealing the bags before closing the cartons.
  • the automatic control of the shaper occurs when one of the bags has been opened by the articulated gripping device, for example and non-exclusively on the basis of information transmitted to the control assembly when the second movement of the articulated gripping device is completed.
  • this shaper is in the form of four fingers whose length is greater than the maximum height of the boxes in which the bags must be placed. Running parallel to the height of the carton, these fingers are interconnected by a set of rails which are perpendicular to them and along which they are able to slide in directions parallel to the directions of the upper edges of the carton, so as to define a volume similar to the interior volume of the carton.
  • the four fingers are then moved downwards to be inserted in the carton, substantially to the bottom thereof, and then moved to move away from each other and come respectively to each inner corner of said carton.
  • the fingers of the shaper are then automatically ordered to move in translation to the top of the carton and, once reached the upper part of the latter, to deviate further so as to stand near the outer corners of it. They are then at again ordered to move downward towards the bottom of the carton, such that they cause, in their displacement, the upper part of the outer walls of the bag to be pressed against the outer walls of said carton to form a flange.
  • the height of the walls of the bag is for this purpose greater than the depth of the cardboard.
  • the shaper may consist of two groups of two plates, full or perforated, an inner group and an outer group, the inner group plates ensuring the cladding of the outer walls of the bag against the inner walls of the carton, and the outer group plates making the outer flap of the bag on the outer top of the carton.
  • the walls of the bag produce a reproducible internal liner of the walls of the carton, preventing any contact between them and the products to be packaged and thus meeting requirements of cleanliness and protection of the products.
  • the machine thus constituted of its carton conveyor, its bag support device, its articulated unit gripping device bags, its shaper and its control assembly, thus allows a reproducible and precise implementation bags in cartons.
  • the shaper and the movements of the latter ensures the preservation of the entire interior volume of each carton, to ensure an optimal volume of packaging.
  • its articulated bag gripping device it guarantees the reproducible unitary gripping of each bag to be placed in a carton, without the need to use bags on which a specific weakening zone has been used. previously arranged.
  • the machine according to the invention thus makes it possible to reduce the packaging costs of the products.
  • the machine comprises a conveyor 1 for moving packing boxes 2, a bag feed station 3 made of plastic material, and a unitary insertion station for each of the bags 3 in a carton of pack 2 conveyed by the cartons transport conveyor.
  • the bag insertion station in the cartons comprises an articulated unit gripping device 4 of the bags and a shaper 5 which carries out the actual insertion of each of the bags in each of the boxes conveyed by the transport conveyor.
  • the machine according to the invention further comprises a control station 6, not shown in the figures, in which are grouped the automatic control means of its various elements, as well as the various interfaces necessary for its use by an operator and the different automatic safety devices necessary for its operation.
  • the machine according to the invention may also include, for the purpose of supplying the transport conveyor 1, one or more unfolding station packing cartons from folded preforms.
  • the conveyor scroll 1 conveys the cartons in the machine such that they are presented successively unitarily in front of the bagging station and the bag insertion station in the cartons.
  • the plastic bagging station includes a bag magazine, more specifically illustrated by the figure 2 , which is in the form of a reversible flat plate, each face of which comprises a holding bracket 31 and two support rods 32 intended to be threaded through the suspension eyelets 300 of a stack of plastic bags 3 .
  • Each support rod 32 is slightly curved at its end to prevent slippage of the stack of bags out of said rods. Maintaining the stack of bags is reinforced by the holding bracket 31 behind which is placed the stack of bags when inserted into the bag store.
  • the bag magazine being reversible, it can be loaded with a stack of bags on one side of the plate 30, while the bags of the stack previously loaded on the opposite side thereof are individually inserted in the cartons conveyed by the conveyor 1 and appearing individually in the bag insertion station.
  • the operation of loading a stack of bags is thus done in masked time while another stack of bags is used by the machine, which increases the efficiency of the machine according to the invention.
  • the plate 30 is automatically controlled, on the basis of information transmitted to the control station 6 by an end-of-pile detection system. door, rotate one-half turn on itself to present the newly loaded stack of bags to the articulated gripping device 4 to insert them in new packaging boxes 2 running on the conveyor 1.
  • the articulated unitary gripping device 4 of the bags is more precisely illustrated by the Figures 3 and 4 .
  • the support rail 40 comprises a support rail 40 arranged substantially horizontally, in the vicinity of one end of which is fixed a gripping plate 41. At its opposite end (not shown in the figures), the support rail 40 is connected to a non-detailed arm on the Figures, movable to move or move said support rail from the bag store.
  • the gripping plate 41 is substantially rectangular in shape and is arranged parallel to the support rail 40, preferably above and in front of the latter with respect to the stack of bags presented by the bag store. It is symmetrical with respect to its vertical axis, and its front face is facing the front sheet of the extreme bag of the stack of bags to be inserted into the packing cartons, as clearly illustrated by figure 3 .
  • the plate 41 (see figure 4 ) is hollow and pierced, at each end of its front face intended to come into contact with the front sheet of a bag, a group of orifices 410 around which is placed a seal 42 made for example of an elastomeric material.
  • a holding plate 43 pierced with a central orifice 430 whose shape is complementary to that of the perimeter of the group of orifices 410, is attached and fixed to each end of the plate 41 so that it sandwiches the seal 42.
  • the plate 41 is, moreover, pierced, on its rear face and in the vicinity of each of its ends, with an orifice 45 through which it is connected, by a set of tubes 46, to a pneumatic vacuum circuit. 47, not detailed in the figures.
  • a solenoid valve not shown in the figures, controlled by the control unit 6 of the machine, is inserted on the tubing 46, between the orifices 45 and the pneumatic vacuum circuit.
  • the group of orifices 410 thus directly connects the pneumatic suction device 47 and the outside, via the internal volume of the hollow plate 41, and this connection is sealed by the presence of the seals 42 taken sandwiched between the front face of the plate 41 and the holding plates 43.
  • the pneumatic suction device preferably operates according to the principle of the Venturi effect, by otherwise known in itself.
  • connection plate 48 On the rear face of the plate 41, and in the vicinity of the vertical axis Z1 of the latter, is fixed, vertically, a connection plate 48 of substantially rectangular shape which comprises, on its rear face, connecting means with the front face of the support rail 40. These means provide a vertical sliding connection between said support rail and the assembly formed of the plates 48 and 41. According to the preferred embodiment of the invention illustrated by the figures, these connecting means consist of a groove formed vertically rearward face of the plate 48, and cooperating with a set of rollers or complementary bearings placed on the front of the support rail.
  • the plates 41 and 48 may be made in two half-plates symmetrically arranged on the support rail 40 with respect to an axis Z1, half-plates whose spacing can be adjusted according to the width of the packing cartons and that of the bags to be inserted, thus increasing the versatility of the machine.
  • a set of detectors / transmitters for example photocells, transmits to the control station 6 of the machine a piece of information. presence of cardboard.
  • the conveyor 1 is automatically stopped, and the movable arm carrying the support rail 40 is then automatically controlled to move the rail horizontally to the bag store to place the front face of the gripping plate 41 against the front sheet of the end bag of the pile that faces it in the bag store in use.
  • the solenoid valve placed between the orifices 45 of the gripping plate 41 and the pneumatic vacuum circuit 47 is then automatically controlled to open: the front sheet of the bag is thus sucked against the gripping assembly formed by the gripping plate 41, the seals 42 and retaining plates 43.
  • the movable arm carrying the support rail 40 is automatically controlled to print said rail a horizontal movement of very small amplitude to move away from the pile of bags, then the connecting plate 48 is automatically controlled to perform a vertical translation movement of small amplitude.
  • the front sheet of the bag During the vertical translation movement, the front sheet of the bag, previously pressed by suction against the front face of the gripping plate 41, rubs against the rear face of the same bag and is detached from it.
  • the force exerted by the gripping device on the front sheet of the bag is sufficient to tear this sheet before the support rods to which it is attached by the suspension eyelets that it carries and which constitute zones of natural fragility of the bag.
  • the tearing of the front sheet of the bag will be made all the easier as the thickness of said sheet, and therefore that of said bag, will be low: in addition to the implementation of standard bags simply drilled with suspension holes, the machine according to the invention therefore allows the implementation of lightweight bags, reducing the total weight of the packaging thus produced.
  • the movable arm carrying the support rail 40 is then automatically controlled, for example on the basis of a vertical translation end information transmitted by a limit switch, to move said support rail away from the bag stack: the seized bag is thus open, its back sheet is still linked to the support rods of the bag store.
  • the shaper 5 is more precisely illustrated by the figure 5 .
  • the shaper 5 consists of four substantially vertical plates symmetrically mounted in pairs on a support rail 52 which is perpendicular thereto and which is arranged parallel to the support rail 40 which accommodates the plate 41 for gripping the bags.
  • the support rail 52 is itself secured to a vertical bracket 53 along which it is slidable to move the plates of the shaper towards or away from the bottom of a carton 2.
  • the plates of the shaper are in the form of two groups each comprising two plates, hereinafter referred to as "external” and “internal”, respectively 50 and 51. These two groups mounted symmetrically relative to each other. the other on the support rail 52 and able to slide along the latter in such a way that, in their sliding, they move away from or approach each other symmetrically with respect to a vertical axis Z2 passing substantially by the middle of the support rail 52.
  • the outer plates 50 are solid and formed into angles along their vertical edges. Their general shape is rectangular, and their greatest length is vertical. They are each carried by a sliding plate 500 along the support rail 52.
  • the internal plates, 51 substantially rectangular, are perforated: according to the embodiment illustrated by the figures, they are formed of wire a few millimeters in section, folded to form a rectangle whose long length is vertical, stiffened by two son vertices joining the short lengths of the rectangle.
  • Each plate 51 is mounted on a vertical rod 510 connected to the corresponding plate 500 by a vertical sliding connection.
  • the secondary plates 51 are placed between the main plates 50. In the rest position of the shaper, the secondary plates 50 extend farther down than the main plates 50: in others In other words, the lower part of the secondary plates 51 penetrates the cavity formed by an open bag before the lower part of the main plates 50 does so.
  • the plates 51 are also arranged relative to each other so that their lower parts are closer to each other than their upper parts, which facilitates the insertion of the shaper within the cavity formed by the open bag by the articulated gripping device.
  • each outer plate 50 and the inner plate 51 which is connected thereto via a support rod 510 and a predefined plate 500 is slightly greater than the wall thickness of a packing carton 2.
  • the operation of the shaper 5 is as follows.
  • the shaper is in its rest position during gripping operations and opening a bag by the articulated gripping device.
  • the support rail 52 of the shaper is automatically controlled, for example from a limit signal of the articulated gripping device, to slide downward to achieve the desired effect. inserting the lower part of the inner plates 51 into the cavity formed by the open bag.
  • the plates 500 of the shaper are controlled to deviate from each other with respect to the central axis Z2 of the support rail 52: it follows that the two groups of external plates 50 and internal 51 deviate from each other until the bag is fully open.
  • the support rail 52 is then controlled to slide vertically downwardly along the bracket 53, and at the same time, the inner plates 51 are also controlled to slide vertically along the rods 510 which carry them.
  • the bag is driven into the packaging carton placed in the bag insertion station.
  • its back sheet which had remained connected to the support rods 32 of the bag magazine, is torn from them, and its front sheet, previously retained by suction against the plate 41 of the articulated gripping device, is released of the latter, the solenoid valve controlled by the suction device being simultaneously closed automatically.
  • the maximum spacing of the secondary plates 51 between them predefined according to the type of cardboard placed in the insertion station, being slightly less than the inside width of said carton, the bag is then pressed against the inner walls of the cardboard box. packaging.
  • the relative positions of the outer and inner plates of the shaper are defined in such a way that, when the inner plates are near the bottom of the packaging board to press the plastic bag, the upper part of said carton is located between said inner plates and the lower part of the outer plates, the angles forming the vertical edges of the latter being fitted around the top of the vertical edges of the carton and thus ensuring a retention in place thereof while the bag is pressed against its inner walls.
  • the inner plates are then controlled to slide vertically upwards in a low amplitude motion, while the support rail 52 is in turn slid vertically downward, driving the outer plates with it.
  • the upper part of the bag is folded against the outer walls of the upper part of the carton, forming a flap on the latter.
  • the angles forming the vertical edges of the outer plates act as a guide for the correct formation of the flap of the bag on the entire outer periphery of the cardboard.
  • the entire shaper is controlled to return to its rest position.
  • the conveyor 1 can then be ordered to restart to route a new cardboard in the bag insertion station of the machine according to the invention.
  • the invention thus makes it possible to simply carry out the insertion of a bag into a packaging carton.
  • it implements bags of simple and inexpensive manufacture, not requiring the realization of weakening zones other than those it carries for their suspension to support rods .

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Description

L'invention se rapporte au domaine de l'emballage. Elle concerne plus précisément les équipements destinés à la mise en oeuvre de sacs venant en chemisage des parois internes de cartons d'emballage dans une chaîne automatisée de conditionnement de produits. Il est entendu que le terme générique de "cartons" désignera dans ce qui suit tout type de contenant apte à recevoir des produits et dont les parois intérieures sont aptes à recevoir en doublure des sacs destinés, par exemple, à protéger les produits emballés, qu'il s'agisse de cartons à proprement parler, ou de bacs par exemple réalisés en matière plastique, en bois, ou en métal léger, à parois pleines ou à clairevoie. Un tel équipement est connu du document JP 100 86246 .The invention relates to the field of packaging. It relates more specifically to equipment for the implementation of bags from lining the inner walls of packaging cartons in an automated product packaging chain. It is understood that the generic term "cartons" will denote in the following any type of container capable of receiving products and whose inner walls are able to receive in lining bags intended, for example, to protect packaged products, which it is cardboard strictly speaking, or trays for example made of plastic, wood, or light metal, solid walls or clear. Such equipment is known from the document JP 100 86246 .

Les sacs destinés à venir chemiser les parois internes de tels contenants sont habituellement réalisés en film de matière plastique, pour des questions de résistance et d'étanchéité. De manière connue dans certaines chaînes de conditionnement, celles s'appliquant à l'emballage de produits en vrac en particulier, les sacs sont initialement présentés empilés les uns derrière les autres sur des tiges support auxquelles ils sont suspendus. Ils sont enfilés sur ces tiges par des oeillets qu'ils comportent à cet effet au voisinage de leur bord supérieur. Les tiges sont typiquement au nombre de deux. En passant par les oeillets des différents sacs, elles sont engagées à travers toutes les épaisseurs de paroi d'une pile d'un nombre prédéfini de sacs.Bags intended to come lining the internal walls of such containers are usually made of plastic film, for resistance and sealing issues. In a known manner in certain packaging lines, those applying to the packaging of bulk products in particular, the bags are initially presented stacked one behind the other on support rods to which they are suspended. They are threaded on these rods by eyelets they have for this purpose in the vicinity of their upper edge. The stems are typically two in number. Going through the eyelets of the different bags, they are engaged through all the wall thicknesses of a stack of a predefined number of bags.

Pour pouvoir, au moyen d'un dispositif mécanique automatisé, dégager successivement facilement et de manière reproductible les différents sacs de la pile, il est connu de ménager sur ces derniers des zones de fragilité, au voisinage des oeillets de suspension que chacun d'entre eux comporte. Quelle que soit la forme prise par ces zones de fragilité - orifices supplémentaires, fentes, etc ... - leur création sur l'une, au moins, des feuilles de paroi de chacun des sacs génère toutefois un surcoût de fabrication de ceux-ci.In order to be able, by means of an automated mechanical device, to easily and reproducibly release the different bags of the stack in succession, it is known to provide the latter with zones of weakness, in the vicinity of the suspension eyelets that each of them they entails. Whatever the shape taken by these zones of fragility - additional orifices, slots, etc. - their creation on at least one of the wall sheets of each of the bags, however, generates an additional manufacturing cost thereof. .

La présente invention vise à proposer une machine pour le chemisage de cartons d'emballage par des sacs stockés empilés, machine qui puisse mettre en oeuvre des sacs simples et d'un coût réduit, tout en optimisant le volume disponible au sein de chaque carton destiné à recevoir les produits à emballer pour un emballage optimal desdits produits.The present invention aims at providing a machine for lining packaging cartons with stored stacked bags, a machine that can implement simple bags and at a reduced cost, while optimizing the available volume within each carton intended to receive the products to be packaged for optimal packaging of said products.

Selon une de ses caractéristiques, une machine conforme à l'invention comporte un dispositif de préhension et de dégagement des sacs qui est articulé et qui combine des moyens de déplacement horizontal et des moyens de coulissement vertical pour effectuer deux mouvements successifs : un premier mouvement de translation, de faible amplitude, selon une direction parallèle à la direction d'empilement des sacs sur les tiges support, et un second mouvement de translation perpendiculaire à cette même direction. Ce mouvement est avantageusement orienté vers le carton dans lequel le sac doit être inséré.According to one of its features, a machine according to the invention comprises a device for gripping and disengaging the bags which is articulated and which combines means of horizontal displacement and vertical sliding means for perform two successive movements: a first translational movement, of low amplitude, in a direction parallel to the stacking direction of the bags on the support rods, and a second translational movement perpendicular to the same direction. This movement is advantageously directed towards the carton in which the bag is to be inserted.

La machine selon l'invention inclut également des moyens pour acheminer automatiquement des cartons vers un poste d'insertion de sacs qu'elle comprend. A titre d'exemple non exclusif, ces moyens d'acheminement automatique peuvent se présenter sous la forme d'un convoyeur sur lequel les cartons sont entraînés un à un à défiler vers le poste d'insertion des sacs. Ce dernier comporte des moyens de détection de la présence d'un carton prêt à recevoir un sac, et des moyens de transmission de l'information de présence d'un tel carton à un ensemble de contrôle qui commande alors automatiquement, d'une part, l'arrêt du convoyeur sur lequel défilent les cartons, et, d'autre part, les mouvements du dispositif de préhension des sacs.The machine according to the invention also includes means for automatically conveying cartons to a bag insertion station that it comprises. As a non-exclusive example, these automatic routing means may be in the form of a conveyor on which the cartons are driven one by one to scroll to the bag insertion station. The latter comprises means for detecting the presence of a cardboard ready to receive a bag, and means for transmitting the presence information of such a cardboard to a control unit which then automatically controls, on the one hand , stopping the conveyor on which the cartons scroll, and, on the other hand, the movements of the bag gripping device.

Dans la machine selon l'invention, le premier mouvement de translation effectué par le dispositif articulé de préhension résulte d'une aspiration, par des moyens en soi classiques que ledit dispositif de préhension comporte, de la feuille avant du sac à saisir, et le second mouvement de translation est induit par le déplacement du dispositif articulé de préhension selon une direction perpendiculaire à la direction d'empilement des sacs sur les tiges support. Le second déplacement est avantageusement dirigé vers le carton dans lequel le sac doit être mis en place. En d'autres termes, après une légère aspiration de la feuille avant du sac, effectuée préférentiellement au plus près des oeillets de suspension, le dispositif articulé de préhension opère un mouvement qui conduit ladite feuille avant dudit sac à frotter contre la feuille arrière du même sac afin de séparer ces deux feuilles l'une de l'autre pour ouvrir le sac, de manière similaire au mouvement effectué entre deux doigts par une personne souhaitant séparer les deux feuilles d'un sachet plastique pour ouvrir ce dernier.In the machine according to the invention, the first translational movement effected by the articulated gripping device results from an aspiration, by means in itself conventional that said gripping device comprises, from the front sheet of the bag to be gripped, and the second translational movement is induced by the displacement of the articulated gripping device in a direction perpendicular to the stacking direction of the bags on the support rods. The second movement is preferably directed to the carton in which the bag is to be put in place. In other words, after a slight suction of the front sheet of the bag, preferably made closer to the suspension eyelets, the articulated gripping device operates a movement which leads said front sheet of said rubbing bag against the back sheet of the same bag to separate these two sheets from one another to open the bag, similar to the movement between two fingers by a person wishing to separate the two sheets of a plastic bag to open the latter.

Lors de ce second mouvement du dispositif articulé de préhension, la feuille avant du sac saisi, est naturellement arrachée des tiges de support, sans qu'il soit nécessaire de ménager préalablement sur cette feuille une quelconque zone de fragilité autre que celle que constituent naturellement les oeillets de suspension du sac aux tiges support.During this second movement of the articulated gripping device, the front sheet of the sacked bag is naturally torn off the support rods, without it being necessary to previously arrange on this sheet any area of weakness other than that which naturally constitute the eyelets for hanging from the bag to the support rods.

La machine selon l'invention comporte également, selon une autre de ses caractéristiques, un conformateur qui est commandé à se déplacer, d'une part, pour plaquer les parois externes du sac contre les parois intérieures du carton, et, d'autre part, pour rabattre contre la partie supérieure des faces extérieures de ce carton la partie supérieure des parois externes dudit sac. La hauteur des sacs est, en effet, avantageusement préalablement déterminée pour être sensiblement supérieure à la profondeur des cartons, afin que faciliter les opérations ultérieures de remplissage par des produuits à emballer, ainsi que les opérations de scellement des sacs avant fermeture des cartons. La commande automatique du conformateur intervient dès lors que l'un des sacs a été ouvert par le dispositif articulé de préhension, par exemple et de manière non exclusive sur la base d'une information transmise à l'ensemble de contrôle lorsque le second mouvement du dispositif articulé de préhension est achevé.The machine according to the invention also comprises, according to another of its characteristics, a shaper which is controlled to move, on the one hand, for pressing the outer walls of the bag against the inner walls of the cardboard, and, on the other hand, to fold against the upper part of the outer faces of this cardboard the upper part of the outer walls of said bag. The height of the bags is, in fact, advantageously previously determined to be substantially greater than the depth of the cartons, so as to facilitate subsequent filling operations by products to be packaged, as well as the operations of sealing the bags before closing the cartons. The automatic control of the shaper occurs when one of the bags has been opened by the articulated gripping device, for example and non-exclusively on the basis of information transmitted to the control assembly when the second movement of the articulated gripping device is completed.

Dans son principe et dans sa version la plus simple, non limitative, ce conformateur se présente sous la forme de quatre doigts dont la longueur est supérieure à la hauteur maximale des cartons dans lesquels les sacs doivent être placés. Dirigés parallèlement à la hauteur du carton, ces doigts sont reliés entre eux par un ensemble de rails qui leur sont perpendiculaires et le long desquels ils sont à même de coulisser selon des directions parallèles aux directions des arêtes supérieures du carton, de manière à délimiter un volume similaire au volume intérieur du carton.In its principle and in its simplest, non-limiting version, this shaper is in the form of four fingers whose length is greater than the maximum height of the boxes in which the bags must be placed. Running parallel to the height of the carton, these fingers are interconnected by a set of rails which are perpendicular to them and along which they are able to slide in directions parallel to the directions of the upper edges of the carton, so as to define a volume similar to the interior volume of the carton.

Initialement groupés et commandés automatiquement, dès lors que les feuilles avant et arrière du sac ont été séparées par le dispositif articulé de préhension, à venir se placer au sein de la cavité formée par ledit sac ainsi saisi et ouvert, les quatre doigts sont ensuite déplacés vers le bas pour être insérés dans le carton, sensiblement jusqu'au fond de celui-ci, puis déplacés pour s'écarter les uns des autres et venir se placer respectivement dans chaque angle intérieur dudit carton.Initially grouped and automatically controlled, since the front and rear sheets of the bag have been separated by the articulated gripping device, to be placed within the cavity formed by said bag thus grasped and opened, the four fingers are then moved downwards to be inserted in the carton, substantially to the bottom thereof, and then moved to move away from each other and come respectively to each inner corner of said carton.

Dans leur mouvement vers le bas jusqu'au fond du carton, ces doigts, en entraînant le sac dans lequel ils ont été accueillis, entraînent également naturellement la feuille arrière de ce dernier, qui se trouve alors complètement détaché à la fois des tiges support et du dispositif articulé de préhension auxquels il était encore attaché. Par ailleurs, dans leurs mouvements vers les angles intérieurs du carton, les doigts du conformateur entraînent le sac, qui se trouve ainsi plaqué contre les parois intérieures de ce carton.In their downward movement to the bottom of the carton, these fingers, dragging the bag in which they were received, also naturally cause the back sheet of the latter, which is then completely detached from both the support rods and of the articulated gripping device to which he was still attached. In addition, in their movements towards the interior corners of the carton, the fingers of the shaper drive the bag, which is thus pressed against the inner walls of this cardboard.

Pour parfaire la mise en place du sac dans le carton, les doigts du conformateur sont ensuite automatiquement commandés à se déplacer en translation vers le haut du carton puis, une fois atteinte la partie supérieure de ce dernier, à s'écarter encore de manière à se placer au voisinage des coins extérieurs de celui-ci. Ils sont ensuite à nouveau commandés à se déplacer vers le bas, vers le fond du carton, de telle manière qu'ils entraînent, dans leur déplacement, la partie supérieure des parois externes du sac à se plaquer contre les parois extérieures dudit carton pour former un rebord. La hauteur des parois du sac est à cet effet supérieure à la profondeur du carton. Une fois cette opération effectuée, les doigts du conformateur sont à nouveau automatiquement commandés à se regrouper en attente de la mise en place d'un sac suivant dans un carton suivant.To complete the introduction of the bag in the carton, the fingers of the shaper are then automatically ordered to move in translation to the top of the carton and, once reached the upper part of the latter, to deviate further so as to stand near the outer corners of it. They are then at again ordered to move downward towards the bottom of the carton, such that they cause, in their displacement, the upper part of the outer walls of the bag to be pressed against the outer walls of said carton to form a flange. The height of the walls of the bag is for this purpose greater than the depth of the cardboard. Once this is done, the fingers of the shaper are again automatically ordered to regroup waiting for the establishment of a next bag in a next carton.

Selon d'autres modes de réalisation avantageux de l'invention, le conformateur peut être constitué de deux groupes de deux plaques, pleines ou ajourées, un groupe intérieur et un groupe extérieur, les plaques du groupe intérieur assurant le plaquage des parois extérieures du sac contre les parois intérieures du carton, et les plaques du groupe extérieur réalisant le rabat extérieur du sac sur la partie supérieure externe du carton.According to other advantageous embodiments of the invention, the shaper may consist of two groups of two plates, full or perforated, an inner group and an outer group, the inner group plates ensuring the cladding of the outer walls of the bag against the inner walls of the carton, and the outer group plates making the outer flap of the bag on the outer top of the carton.

Quel que soit le mode de réalisation choisi, les parois du sac réalisent un chemisage interne reproductible des parois du carton, empêchant tout contact entre celles-ci et les produits à emballer et répondant ainsi à des exigences de propreté et de protection des produits.Whatever the embodiment chosen, the walls of the bag produce a reproducible internal liner of the walls of the carton, preventing any contact between them and the products to be packaged and thus meeting requirements of cleanliness and protection of the products.

La machine ainsi constituée de son convoyeur d'acheminement de cartons, de son dispositif de support de sacs, de son dispositif articulé de préhension unitaire des sacs, de son conformateur et de son ensemble de contrôle, permet donc une mise en place reproductible et précise de sacs au sein de cartons. Par la configuration du conformateur et les mouvements de ce dernier, elle assure la préservation de l'intégralité du volume intérieur de chaque carton, pour la garantie d'un volume optimal d'emballage. De plus, par son dispositif articulé de préhension des sacs, elle garantit la saisie unitaire reproductible de chaque sac à disposer dans un carton, et ce, sans qu'il soit nécessaire d'utiliser des sacs sur lesquels une zone de fragilisation spécifique a été préalablement ménagée. Mettant en oeuvre des sacs de fabrication très simple et de bas coût, la machine selon l'invention permet ainsi une réduction des coûts d'emballage des produits.The machine thus constituted of its carton conveyor, its bag support device, its articulated unit gripping device bags, its shaper and its control assembly, thus allows a reproducible and precise implementation bags in cartons. By the configuration of the shaper and the movements of the latter, it ensures the preservation of the entire interior volume of each carton, to ensure an optimal volume of packaging. In addition, by its articulated bag gripping device, it guarantees the reproducible unitary gripping of each bag to be placed in a carton, without the need to use bags on which a specific weakening zone has been used. previously arranged. Putting into effect very simple and low-cost manufacturing bags, the machine according to the invention thus makes it possible to reduce the packaging costs of the products.

D'autres caractéristiques et avantages de l'invention ressortiront plus précisément de la description qui suit d'un mode de réalisation préféré, mais non limitatif, de la machine selon l'invention, et des figures que cette description détaillée comporte, à savoir :

  • la figure 1, qui est une vue schématique d'ensemble des principaux éléments de la machine selon le mode de réalisation préféré de l'invention choisi,
  • la figure 2, qui est une vue schématique d'un magasin de sacs de la machine selon l'invention,
  • la figure 3, qui est une vue schématique, de dos, du dispositif articulé de préhension des sacs,
  • la figure 4, qui est une vue schématique d'un détail du dispositif articulé de préhension des sacs,
  • et la figure 5, qui est une vue schématique du conformateur.
Other features and advantages of the invention will become more clearly apparent from the following description of a preferred embodiment, but not limiting, of the machine according to the invention, and the figures that this detailed description comprises, namely:
  • the figure 1 , which is a schematic overview of the main elements of the machine according to the preferred embodiment of the chosen invention,
  • the figure 2 which is a schematic view of a bag magazine of the machine according to the invention,
  • the figure 3 , which is a schematic view of the back of the articulated bag gripping device,
  • the figure 4 which is a schematic view of a detail of the articulated bag gripping device,
  • and the figure 5 which is a schematic view of the shaper.

Ainsi que le montre la figure 1, la machine selon l'invention comporte un convoyeur 1 de défilement de cartons d'emballage 2, un poste d'alimentation en sacs 3 en matière plastique, ainsi qu'un poste d'insertion unitaire de chacun des sacs 3 dans un carton d'emballage 2 acheminé par le convoyeur de transport de cartons. Le poste d'insertion des sacs dans les cartons comporte un dispositif articulé de préhension unitaire 4 des sacs et un conformateur 5 qui réalise l'insertion à proprement parler de chacun des sacs dans chacun des cartons acheminés par le convoyeur de transport.As shown in figure 1 the machine according to the invention comprises a conveyor 1 for moving packing boxes 2, a bag feed station 3 made of plastic material, and a unitary insertion station for each of the bags 3 in a carton of pack 2 conveyed by the cartons transport conveyor. The bag insertion station in the cartons comprises an articulated unit gripping device 4 of the bags and a shaper 5 which carries out the actual insertion of each of the bags in each of the boxes conveyed by the transport conveyor.

La machine selon l'invention comporte en outre un poste de contrôle 6, non représenté sur les figures, dans lequel sont regroupés les moyens de commande automatique de ses différents éléments, ainsi que les différents interfaces nécessaires à son utilisation par un opérateur et les différents dispositifs de sécurité automatique nécessaires à son fonctionnement.The machine according to the invention further comprises a control station 6, not shown in the figures, in which are grouped the automatic control means of its various elements, as well as the various interfaces necessary for its use by an operator and the different automatic safety devices necessary for its operation.

Selon différentes variantes non représentées sur les figures, la machine selon l'invention peut également inclure, aux fins d'alimentation du convoyeur de transport 1, un ou plusieurs poste de dépliage des cartons d'emballage à partir de préformes pliées.According to different variants not shown in the figures, the machine according to the invention may also include, for the purpose of supplying the transport conveyor 1, one or more unfolding station packing cartons from folded preforms.

Le convoyeur de défilement 1 achemine les cartons dans la machine de telle manière que ceux-ci se présentent successivement unitairement devant le poste d'alimentation en sacs et le poste d'insertion des sacs dans les cartons.The conveyor scroll 1 conveys the cartons in the machine such that they are presented successively unitarily in front of the bagging station and the bag insertion station in the cartons.

Le poste d'alimentation en sacs en matière plastique comprend un magasin de sacs, plus précisément illustré par la figure 2, qui se présente sous la forme d'une plaque plane 30 réversible, dont chaque face comporte un étrier de maintien 31 et deux tiges support 32 destinées à être enfilées au travers des oeillets de suspension 300 d'une pile de sacs 3 en matière plastique. Chaque tige support 32 est légèrement recourbée à son extrémité afin d'éviter tout glissement de la pile de sacs hors desdites tiges. Le maintien de la pile de sacs est renforcé par l'étrier de maintien 31 derrière lequel est placée la pile de sacs lors de son insertion dans le magasin de sacs. Le magasin de sacs étant réversible, il peut être chargé d'une pile de sacs sur l'une des faces de la plaque 30, tandis que les sacs de la pile préalablement chargée sur la face opposée de celle-ci sont unitairement insérés dans les cartons acheminés par le convoyeur 1 et se présentant unitairement dans le poste d'insertion de sacs. L'opération de chargement d'une pile de sacs s'effectue ainsi en temps masqué pendant qu'une autre pile de sacs est utilisée par la machine, ce qui augmente le rendement de la machine selon l'invention. Une fois entièrement consommée la pile placée sur l'une des faces du magasin de sacs, la plaque 30 est automatiquement commandée, sur la base d'une information transmise au poste de contrôle 6 par un système de détection de fin de pile qu'elle porte, à effectuer une rotation d'un demi-tour sur elle-même pour présenter la pile de sacs nouvellement chargée au dispositif articulé de préhension 4 afin de les insérer dans de nouveaux cartons d'emballage 2 circulant sur le convoyeur 1.The plastic bagging station includes a bag magazine, more specifically illustrated by the figure 2 , which is in the form of a reversible flat plate, each face of which comprises a holding bracket 31 and two support rods 32 intended to be threaded through the suspension eyelets 300 of a stack of plastic bags 3 . Each support rod 32 is slightly curved at its end to prevent slippage of the stack of bags out of said rods. Maintaining the stack of bags is reinforced by the holding bracket 31 behind which is placed the stack of bags when inserted into the bag store. The bag magazine being reversible, it can be loaded with a stack of bags on one side of the plate 30, while the bags of the stack previously loaded on the opposite side thereof are individually inserted in the cartons conveyed by the conveyor 1 and appearing individually in the bag insertion station. The operation of loading a stack of bags is thus done in masked time while another stack of bags is used by the machine, which increases the efficiency of the machine according to the invention. When the battery placed on one of the sides of the bag magazine has been completely consumed, the plate 30 is automatically controlled, on the basis of information transmitted to the control station 6 by an end-of-pile detection system. door, rotate one-half turn on itself to present the newly loaded stack of bags to the articulated gripping device 4 to insert them in new packaging boxes 2 running on the conveyor 1.

Le dispositif articulé de préhension unitaire 4 des sacs est plus précisément illustré par les figures 3 et 4.The articulated unitary gripping device 4 of the bags is more precisely illustrated by the Figures 3 and 4 .

Il comporte un rail support 40 disposé sensiblement horizontalement, au voisinage d'une extrémité duquel est fixée une plaque de préhension 41. A son extrémité opposée (non représentée sur les figures), le rail support 40 est lié à un bras non détaillé sur les figures, mobile pour approcher ou éloigner ledit rail support du magasin de sacs. La plaque de préhension 41 est de forme sensiblement rectangulaire et est disposée parallèle au rail support 40, préférentiellement au-dessus et en avant de ce dernier au regard de la pile de sacs présentée par le magasin de sacs. Elle est symétrique par rapport à son axe vertical, et sa face avant se trouve face à la feuille avant du sac extrémal de la pile de sacs à insérer dans les cartons d'emballage, comme l'illustre clairement la figure 3.It comprises a support rail 40 arranged substantially horizontally, in the vicinity of one end of which is fixed a gripping plate 41. At its opposite end (not shown in the figures), the support rail 40 is connected to a non-detailed arm on the Figures, movable to move or move said support rail from the bag store. The gripping plate 41 is substantially rectangular in shape and is arranged parallel to the support rail 40, preferably above and in front of the latter with respect to the stack of bags presented by the bag store. It is symmetrical with respect to its vertical axis, and its front face is facing the front sheet of the extreme bag of the stack of bags to be inserted into the packing cartons, as clearly illustrated by figure 3 .

La plaque 41 (voir figure 4) est creuse et percée, en chaque extrémité de sa face avant destinée à venir au contact de la feuille avant d'un sac, d'un groupe d'orifices 410 autour duquel est placé un joint d'étanchéité 42 réalisé par exemple dans un matériau élastomère. Une plaquette de maintien 43, percée d'un orifice central 430 dont la forme est complémentaire de celle du pourtour du groupe d'orifices 410, est rapportée et fixée à chaque extrémité de la plaque 41 de telle manière qu'elle prend en sandwich le joint d'étanchéité 42.The plate 41 (see figure 4 ) is hollow and pierced, at each end of its front face intended to come into contact with the front sheet of a bag, a group of orifices 410 around which is placed a seal 42 made for example of an elastomeric material. A holding plate 43, pierced with a central orifice 430 whose shape is complementary to that of the perimeter of the group of orifices 410, is attached and fixed to each end of the plate 41 so that it sandwiches the seal 42.

La plaque 41 est, par ailleurs, percée, en sa face arrière et au voisinage de chacune de ses extrémités, d'un orifice 45 par l'intermédiaire duquel elle est reliée, par un ensemble de tubulures 46, à un circuit pneumatique de vide 47, non détaillé sur les figures. Une électrovanne non représentée sur les figures, pilotée par l'ensemble de contrôle 6 de la machine, est insérée sur la tubulure 46, entre les orifices 45 et le circuit pneumatique de vide.The plate 41 is, moreover, pierced, on its rear face and in the vicinity of each of its ends, with an orifice 45 through which it is connected, by a set of tubes 46, to a pneumatic vacuum circuit. 47, not detailed in the figures. A solenoid valve not shown in the figures, controlled by the control unit 6 of the machine, is inserted on the tubing 46, between the orifices 45 and the pneumatic vacuum circuit.

Le groupe d'orifices 410 met donc ainsi directement en relation le dispositif pneumatique d'aspiration 47 et l'extérieur, par l'intermédiaire du volume interne de la plaque creuse 41, et cette liaison est rendue étanche par la présence des joints 42 pris en sandwich entre la face avant de la plaque 41 et les plaquettes de maintien 43. Selon le mode de réalisation préféré de l'invention illustré par les figures, le dispositif pneumatique d'aspiration fonctionne préférentiellement selon le principe de l'effet Venturi, par ailleurs connu en soi.The group of orifices 410 thus directly connects the pneumatic suction device 47 and the outside, via the internal volume of the hollow plate 41, and this connection is sealed by the presence of the seals 42 taken sandwiched between the front face of the plate 41 and the holding plates 43. According to the preferred embodiment of the invention illustrated by the figures, the pneumatic suction device preferably operates according to the principle of the Venturi effect, by otherwise known in itself.

Sur la face arrière de la plaque 41, et au voisinage de l'axe vertical Z1 de cette dernière, est fixée, verticalement, une plaque de liaison 48 de forme sensiblement rectangulaire qui comporte, en sa face arrière, des moyens de liaison avec la face avant du rail support 40. Ces moyens assurent une liaison coulissante verticale entre ledit rail support et l'ensemble formé des plaques 48 et 41. Selon le mode de réalisation préféré de l'invention illustré par les figures, ces moyens de liaison consistent en une rainure ménagée verticalement en face arrière de la plaque 48, et coopérant avec un ensemble de galets ou roulements complémentaires placés en face avant du rail support.On the rear face of the plate 41, and in the vicinity of the vertical axis Z1 of the latter, is fixed, vertically, a connection plate 48 of substantially rectangular shape which comprises, on its rear face, connecting means with the front face of the support rail 40. These means provide a vertical sliding connection between said support rail and the assembly formed of the plates 48 and 41. According to the preferred embodiment of the invention illustrated by the figures, these connecting means consist of a groove formed vertically rearward face of the plate 48, and cooperating with a set of rollers or complementary bearings placed on the front of the support rail.

Il est à noter que, en variante de réalisation non illustrée par les figures, les plaques 41 et 48 peuvent être réalisées en deux demi-plaques symétriquement disposées sur le rail support 40 par rapport à un axe Z1, demi-plaques dont l'espacement peut être réglé en fonction de la largeur des cartons d'emballage et de celle des sacs à y insérer, augmentant ainsi la polyvalence de la machine.It should be noted that, as an alternative embodiment not illustrated by the figures, the plates 41 and 48 may be made in two half-plates symmetrically arranged on the support rail 40 with respect to an axis Z1, half-plates whose spacing can be adjusted according to the width of the packing cartons and that of the bags to be inserted, thus increasing the versatility of the machine.

Le fonctionnement du dispositif articulé de préhension tel qu'il vient d'être décrit dans son mode de réalisation préféré est le suivant.The operation of the articulated gripping device as just described in its preferred embodiment is as follows.

Dès lors que l'un des cartons d'emballage circulant sur le convoyeur 1 entre dans le poste d'insertion de sacs, un ensemble de détecteurs/transmetteurs, par exemple des photocellules, transmet au poste de contrôle 6 de la machine une information de présence de carton. Sur la base de cette information, le convoyeur 1 est automatiquement stoppé, et le bras mobile portant le rail support 40 est alors automatiquement commandé à déplacer le rail horizontalement vers le magasin de sacs pour venir placer la face avant de la plaque de préhension 41 contre la feuille avant du sac d'extrémité de la pile qui lui fait face dans le magasin de sacs en cours d'utilisation.As soon as one of the packaging boxes traveling on the conveyor 1 enters the bag insertion station, a set of detectors / transmitters, for example photocells, transmits to the control station 6 of the machine a piece of information. presence of cardboard. On the basis of this information, the conveyor 1 is automatically stopped, and the movable arm carrying the support rail 40 is then automatically controlled to move the rail horizontally to the bag store to place the front face of the gripping plate 41 against the front sheet of the end bag of the pile that faces it in the bag store in use.

L'électrovanne placée entre les orifices 45 de la plaque de préhension 41 et le circuit pneumatique de vide 47 est alors automatiquement commandée à s'ouvrir : la feuille avant du sac est ainsi aspirée contre l'ensemble de préhension formé par la plaque de préhension 41, les joints d'étanchéité 42 et plaquettes de maintien 43. Concomitamment, le bras mobile portant le rail support 40 est automatiquement commandé à imprimer audit rail un mouvement horizontal de très faible amplitude pour l'éloigner de la pile de sacs, puis la plaque de liaison 48 est automatiquement commandée à effectuer un mouvement de translation verticale de faible amplitude.The solenoid valve placed between the orifices 45 of the gripping plate 41 and the pneumatic vacuum circuit 47 is then automatically controlled to open: the front sheet of the bag is thus sucked against the gripping assembly formed by the gripping plate 41, the seals 42 and retaining plates 43. Concomitantly, the movable arm carrying the support rail 40 is automatically controlled to print said rail a horizontal movement of very small amplitude to move away from the pile of bags, then the connecting plate 48 is automatically controlled to perform a vertical translation movement of small amplitude.

Au cours du mouvement de translation verticale, la feuille avant du sac, préalablement plaquée par aspiration contre la face avant de la plaque de préhension 41, frotte contre la face arrière du même sac et se trouve décollée de celle-ci. De plus, la force exercée par le dispositif de préhension sur la feuille avant du sac suffit à arracher cette feuille avant des tiges support auxquelles elle est accrochée par les oeillets de suspension qu'elle porte et qui constituent des zones de fragilité naturelle du sac. Il est à noter que l'arrachement de la feuille avant du sac sera rendu d'autant plus facile que l'épaisseur de ladite feuille, et donc celle dudit sac, sera faible : outre la mise en oeuvre de sacs standard simplement percés d'orifices de suspension, la machine selon l'invention autorise donc la mise en oeuvre de sacs de faible poids, diminuant d'autant le poids total de l'emballage ainsi réalisé.During the vertical translation movement, the front sheet of the bag, previously pressed by suction against the front face of the gripping plate 41, rubs against the rear face of the same bag and is detached from it. In addition, the force exerted by the gripping device on the front sheet of the bag is sufficient to tear this sheet before the support rods to which it is attached by the suspension eyelets that it carries and which constitute zones of natural fragility of the bag. It should be noted that the tearing of the front sheet of the bag will be made all the easier as the thickness of said sheet, and therefore that of said bag, will be low: in addition to the implementation of standard bags simply drilled with suspension holes, the machine according to the invention therefore allows the implementation of lightweight bags, reducing the total weight of the packaging thus produced.

Le bras mobile portant le rail support 40 est ensuite automatiquement commandé, par exemple sur la base d'une information de fin de translation verticale transmise par un interrupteur de fin de course, à éloigner ledit rail support de la pile de sac : le sac saisi se trouve ainsi ouvert, sa feuille arrière étant encore liée aux tiges support du magasin de sacs.The movable arm carrying the support rail 40 is then automatically controlled, for example on the basis of a vertical translation end information transmitted by a limit switch, to move said support rail away from the bag stack: the seized bag is thus open, its back sheet is still linked to the support rods of the bag store.

Le conformateur 5 est plus précisément illustré par la figure 5.The shaper 5 is more precisely illustrated by the figure 5 .

Le conformateur 5 se compose de quatre plaques sensiblement verticales montées symétriquement deux à deux sur un rail support 52 qui leur est perpendiculaire et qui est disposé parallèlement au rail support 40 qui accueille la plaque 41 de préhension des sacs. Le rail support 52 est lui-même solidaire d'une potence 53 verticale le long de laquelle il est apte à coulisser pour approcher ou éloigner les plaques du conformateur du fond d'un carton d'emballage 2.The shaper 5 consists of four substantially vertical plates symmetrically mounted in pairs on a support rail 52 which is perpendicular thereto and which is arranged parallel to the support rail 40 which accommodates the plate 41 for gripping the bags. The support rail 52 is itself secured to a vertical bracket 53 along which it is slidable to move the plates of the shaper towards or away from the bottom of a carton 2.

Les plaques du conformateur se présentent sous forme de deux groupes comprenant chacun deux plaques, que l'on désignera dans ce qui suit par "externes" et "internes", respectivement 50 et 51. Ces deux groupes montés symétriquement l'un par rapport à l'autre sur le rail support 52 et aptes à coulisser le long de ce dernier de telle manière que, dans leur coulissement, ils s'éloignent ou se rapprochent l'un de l'autre symétriquement par rapport à un axe vertical Z2 passant sensiblement par le mileu du rail support 52. On définit ainsi une position de repos du conformateur, dans laquelle les plaques sont regroupées sensiblement au milieu du rail support 52, au-dessus d'un carton placé dans le poste d'insertion de sacs et prêt à recevoir un sac, et un ensemble de positions de travail dans lesquelles lesdites plaques sont plus ou moins éloignées les unes des autres symétriquement par rapport à l'axe Z2, et plus ou moins éloignées du volume interne du carton précité.The plates of the shaper are in the form of two groups each comprising two plates, hereinafter referred to as "external" and "internal", respectively 50 and 51. These two groups mounted symmetrically relative to each other. the other on the support rail 52 and able to slide along the latter in such a way that, in their sliding, they move away from or approach each other symmetrically with respect to a vertical axis Z2 passing substantially by the middle of the support rail 52. This defines a rest position of the shaper, wherein the plates are grouped substantially in the middle of the support rail 52, above a cardboard placed in the bag insertion station and ready receiving a bag, and a set of working positions in which said plates are more or less distant from each other symmetrically with respect to the axis Z2, and more or less remote from the internal volume of the aforementioned carton.

Les plaques externes, 50, sont pleines et formées en cornières le long de leurs arêtes verticales. Leur forme générale est rectangulaire, et leur plus grande longueur est verticale. Elles sont chacune portée par une platine 500 coulissante le long du rail support 52.The outer plates 50 are solid and formed into angles along their vertical edges. Their general shape is rectangular, and their greatest length is vertical. They are each carried by a sliding plate 500 along the support rail 52.

Les plaques internes, 51, sensiblement rectangulaires, sont ajourées : selon le mode de réalisation illustré par les figures, elles sont formées de fil métallique de quelques millimètres de section, plié pour former un rectangle dont la grande longueur est verticale, rigidifié par deux fils verticaux joignant les petites longueurs du rectangle. Chaque plaque 51 est montée sur une tige verticale 510 liée à la platine 500 correspondante par une liaison coulissante verticale. Quelle que soit la position du conformateur, les plaques secondaires 51 sont placées entre les plaques principales 50. Dans la position de repos du conformateur, les plaques secondaires 50 s'étendent plus loin vers le bas que les plaques principales 50 : en d'autres termes, la partie inférieure des plaques secondaires 51 pénètre la cavité formée par un sac ouvert avant que la partie inférieure des plaques principales 50 ne le fasse.The internal plates, 51, substantially rectangular, are perforated: according to the embodiment illustrated by the figures, they are formed of wire a few millimeters in section, folded to form a rectangle whose long length is vertical, stiffened by two son vertices joining the short lengths of the rectangle. Each plate 51 is mounted on a vertical rod 510 connected to the corresponding plate 500 by a vertical sliding connection. Whatever the position of the shaper, the secondary plates 51 are placed between the main plates 50. In the rest position of the shaper, the secondary plates 50 extend farther down than the main plates 50: in others In other words, the lower part of the secondary plates 51 penetrates the cavity formed by an open bag before the lower part of the main plates 50 does so.

Les plaques 51 sont par ailleurs disposées l'une par rapport à l'autre de telle manière que leurs parties inférieures sont plus rapprochées l'une de l'autre que leurs parties supérieures, ce qui facilite l'insertion du conformateur au sein de la cavité formée par le sac ouvert par le dispositif articulé de préhension.The plates 51 are also arranged relative to each other so that their lower parts are closer to each other than their upper parts, which facilitates the insertion of the shaper within the cavity formed by the open bag by the articulated gripping device.

Enfin, l'écartement entre chaque plaque externe 50 et la plaque interne 51 qui lui est liée par l'intermédiaire d'une tige support 510 et d'une platine 500, prédéfini, est légèrement supérieur à l'épaisseur de paroi d'un carton d'emballage 2.Finally, the spacing between each outer plate 50 and the inner plate 51 which is connected thereto via a support rod 510 and a predefined plate 500 is slightly greater than the wall thickness of a packing carton 2.

Le fonctionnement du conformateur 5 est le suivant.The operation of the shaper 5 is as follows.

Le conformateur est dans sa position de repos durant les opérations de saisie et d'ouverture d'un sac par le dispositif articulé de préhension. Une fois un sac saisi et ouvert par le dispositif articulé de préhension, le rail support 52 du conformateur est automatiquement commandé, par exemple à partir d'un signal de fin de course du dispositif articulé de préhension, à coulisser vers le bas pour réaliser l'insertion de la partie inférieure des plaques internes 51 au sein de la cavité formée par le sac ouvert. Dans le même temps, les platines 500 du conformateur sont commandées à s'écarter l'une de l'autre par rapport à l'axe central Z2 du rail support 52 : il s'ensuit que les deux groupes de plaques externes 50 et internes 51 s'écartent les unes des autres jusqu'à ce que le sac soit totalement ouvert.The shaper is in its rest position during gripping operations and opening a bag by the articulated gripping device. Once a bag is grasped and opened by the articulated gripping device, the support rail 52 of the shaper is automatically controlled, for example from a limit signal of the articulated gripping device, to slide downward to achieve the desired effect. inserting the lower part of the inner plates 51 into the cavity formed by the open bag. At the same time, the plates 500 of the shaper are controlled to deviate from each other with respect to the central axis Z2 of the support rail 52: it follows that the two groups of external plates 50 and internal 51 deviate from each other until the bag is fully open.

Le rail support 52 est ensuite commandé à coulisser verticalement vers le bas le long de la potence 53, et, dans le même temps, les plaques internes 51 sont également commandées à coulisser verticalement le long des tiges 510 qui les portent. Au cours de ces mouvements combinés, le sac est entraîné vers l'intérieur du carton d'emballage placé dans le poste d'insertion de sac. Dans ce mouvement, sa feuille arrière, qui était restée liée aux tiges support 32 du magasin de sacs, se trouve arrachée de celles-ci, et sa feuille avant, auparavant retenue par aspiration contre la plaque 41 du dispositif articulé de préhension, est libérée de ce dernier, l'électrovanne pilotée du dispositif d'aspiration étant simultanément automatiquement refermée. L'écartement maximal des plaques secondaires 51 entre elles, prédéfini en fonction du type de carton placé dans le poste d'insertion, étant légèrement inférieur à la largeur intérieure dudit carton, le sac se trouve alors plaqué contre les parois internes du carton d'emballage.The support rail 52 is then controlled to slide vertically downwardly along the bracket 53, and at the same time, the inner plates 51 are also controlled to slide vertically along the rods 510 which carry them. During these combined movements, the bag is driven into the packaging carton placed in the bag insertion station. In this movement, its back sheet, which had remained connected to the support rods 32 of the bag magazine, is torn from them, and its front sheet, previously retained by suction against the plate 41 of the articulated gripping device, is released of the latter, the solenoid valve controlled by the suction device being simultaneously closed automatically. The maximum spacing of the secondary plates 51 between them, predefined according to the type of cardboard placed in the insertion station, being slightly less than the inside width of said carton, the bag is then pressed against the inner walls of the cardboard box. packaging.

Il est à noter que les positions relatives des plaques externes et internes du conformateur sont définies de telle manière que, lorsque les plaques internes se trouvent à proximité du fond du carton d'emballage pour y plaquer le sac en plastique, la partie supérieure dudit carton se trouve prise entre lesdites plaques internes et la partie inférieure des plaques externes, les cornières formant les arêtes verticales de ces dernières étant emboîtées autour du sommet des arêtes verticales du carton et assurant ainsi un maintien en place de celui-ci pendant que le sac est plaqué contre ses parois internes.It should be noted that the relative positions of the outer and inner plates of the shaper are defined in such a way that, when the inner plates are near the bottom of the packaging board to press the plastic bag, the upper part of said carton is located between said inner plates and the lower part of the outer plates, the angles forming the vertical edges of the latter being fitted around the top of the vertical edges of the carton and thus ensuring a retention in place thereof while the bag is pressed against its inner walls.

Les plaques internes sont alors commandées à coulisser verticalement vers le haut d'un mouvement de faible amplitude, tandis que le rail support 52 est commandé à son tour à coulisser verticalement vers le bas, entraînant les plaques externes avec lui. Dans ce mouvement, la partie supérieure du sac est rabattue contre les parois externes de la partie supérieure du carton, formant un rabat sur ce dernier. Il est à noter que, pendant ce mouvement, les cornières formant les arêtes verticales des plaques externes jouent un rôle de guide pour la formation correcte du rabat du sac sur la totalité du pourtour extérieur du carton.The inner plates are then controlled to slide vertically upwards in a low amplitude motion, while the support rail 52 is in turn slid vertically downward, driving the outer plates with it. In this movement, the upper part of the bag is folded against the outer walls of the upper part of the carton, forming a flap on the latter. It should be noted that during this movement, the angles forming the vertical edges of the outer plates act as a guide for the correct formation of the flap of the bag on the entire outer periphery of the cardboard.

Une fois le rabat formé, l'ensemble du conformateur est commandé à revenir dans sa position de repos.Once the flap formed, the entire shaper is controlled to return to its rest position.

Le sac ayant été inséré dans le carton d'emballage, et chemisant parfaitement ses parois intérieures ainsi que la partie supérieure de ses parois extérieures, le convoyeur 1 peut alors être commandé à redémarrer pour acheminer un nouveau carton dans le poste d'insertion de sac de la machine selon l'invention.The bag having been inserted in the packaging carton, and perfectly lining its inner walls and the upper part of its outer walls, the conveyor 1 can then be ordered to restart to route a new cardboard in the bag insertion station of the machine according to the invention.

L'invention permet ainsi de réaliser simplement l'insertion d'un sac dans un carton d'emballage. En particulier, par les mouvements combinés de son dispositif articulé de préhension, elle met en oeuvre des sacs de fabrication simple et peu coûteuse, ne nécessitant pas la réalisation de zones de fragilisation autres que celles qu'il portent pour leur suspension à des tiges support.The invention thus makes it possible to simply carry out the insertion of a bag into a packaging carton. In particular, by the combined movements of its articulated gripping device, it implements bags of simple and inexpensive manufacture, not requiring the realization of weakening zones other than those it carries for their suspension to support rods .

L'invention ne saurait toutefois se limiter aux exemples et moyens décrits dans le présent document, et elle s'étend en particulier à tous moyens équivalents et à toute combinaison techniquement opérante de tels moyens, tels que définis par les revendications.The invention can not however be limited to the examples and means described herein, and it extends in particular to all equivalent means and any technically operative combination of such means as defined by the claims.

Claims (7)

  1. An automatic machine for lining with plastic bags, walls of cartons traveling on a conveyor and appearing one by one in a bag-insertion station for receiving therein one of said bags in their inner volume, characterized in that said bags are stored as a stack in a bag magazine where they are slipped onto supporting rods (32) by suspension eyelets which they include in the vicinity of their upper edge, said machine including a jointed device (4) for grasping one by one the bags, which comprises automatic horizontal displacement and vertical sliding means for successively performing a first translational movement along a direction parallel to the direction for stacking the bags on said supporting rods (32) during which the front sheet of a bag to be grasped is flattened by suction against a grasping assembly (41, 42, 43) of said jointed grasping device, and a second translational movement perpendicular to said stacking direction during which said front sheet of said bag is separated from the rear sheet of said bag in order to open the latter and pull away the front sheet of said bag from said supporting rods of said bag magazine.
  2. The machine according to claim 1, characterized in that said jointed grasping device includes a grasping plate (41) mounted on a horizontally movable supporting rail (40) along a direction parallel to the stacking direction of the bags in the bag magazine, said grasping plate being parallel to said supporting rail (40), hollow and pierced at each end of its front face intended to be placed in contact with a front sheet of a bag, with a group of orifices (410) around which is placed a seal gasket (42) itself held by a platelet (43) which sandwiches it with said grasping plate (41), characterized in that said grasping plate is pierced, at each end of its rear face, with an orifice (45) for connection, through tubing (46) with a pneumatic vacuum circuit for achieving suction of said front sheet of said bag, and characterized in that said grasping plate is bound to said movable supporting rail (40) by a connecting plate (48) slidably mounted vertically on the latter.
  3. The machine according to either one of claims 1 or 2, characterized in that it further includes a conformer (5) for flattening the external walls of each of said bags against the inner walls of a carton and for forming a flap of the external walls of each of said bags against the upper portion of the outer faces of said carton, and in that it includes automatic means for controlling the insertion of said conformer into the cavity formed by a bag opened beforehand by the jointed grasping device (4) as well as automatic means for controlling the successive movements of the elements (50, 51, 52) of said conformer in order to achieve, during the lining of the internal space of the carton by said bag, the pulling away of the rear sheet of said bag from said supporting rods (32) and clearing the front sheet of said bag from the jointed grasping device (4).
  4. The machine according to claim 3, characterized in that it includes automatic means for controlling the successive movements of the elements (50, 51, 52) of the conformer (5) for achieving, once the lining of the internal volume of a carton with a bag is completed, a folding back of the upper portion of the external walls of said bag against the upper portion of the outer faces of said carton.
  5. The machine according to either one of claims 3 or 4, characterized in that the conformer (5) comprises two groups of each, an external plate (50) and an internal plate (51), respectively, said plates (50, 51) being substantially vertical, symmetrically mounted two by two on a supporting rail (52) which is perpendicular to them and which is positioned parallel to said grasping plate (41, 43), said supporting rail (52) being itself secured through a sliding connection to a bracket (53) which is perpendicular to it, the vertical edges of said external plates (50) being formed as an angle in order to fit the vertical edges of a carton when lining the latter with a plastic bag, and characterized in that each internal plate (51) is attached onto a supporting rod (510) secured to the external plate (50) of the same group of plates.
  6. The machine according to claim 1, characterized in that it further includes:
    - a conformer (5) for flattening the external walls of each of said bags against the inner walls of a carton and for forming a flap of the external walls of each of said bags against the upper portion of the outer faces of said carton, a conformer (5) which comprises two groups of each, an external plate (50) and an internal plate (51), respectively, said plates (50, 51) being substantially vertical, symmetrically mounted two by two on a supporting rail (52) which is perpendicular to them and which is positioned parallel to said grasping assembly (41, 42, 43), said supporting rail (52) being in itself secured, through a sliding connection, to a bracket (53) which is perpendicular to it, the vertical edges of said external plates (50) being formed as an angle in order to fit the vertical edges of a carton when lining the latter with a plastic bag, and each internal plate (51) being attached onto a supporting rod (510) secured to the external plate (50) of the same group of plates,
    - a monitoring and control station (6) which groups together the automatic control means for the different elements of said jointed grasping device (4) and of the different elements of the conformer (5), as well as the time succession of the movements of said jointed grasping device and conformer for successively achieving the opening of a bag, the pulling away of its front sheet from the supporting rods, and its insertion into a packaging carton present in the bag insertion station at the same time as the pulling away of its rear face from said supporting rods (32) and the releasing of its front sheet from the jointed grasping device.
  7. An automatic lining method with plastic bags stored, stacked in a bag magazine where they are slipped onto supporting rods by suspension eyelets which they include in the vicinity of their upper edge, walls of packaging cartons traveling on a transport conveyor and appearing one by one in a bag insertion station of a packaging machine, wherein successively:
    - the front sheet of the end bag is sucked up, and then displaced facing the rear sheet of said bag in a direction perpendicular to the bag stacking direction so as to be pulled away from said supporting rods,
    - the front sheet of said bag is moved away from the rear sheet of said bag so that the latter is open,
    - the bag is completely open, and then driven towards the inner volume of a carton placed in said bag insertion station so as to be flattened against the inner walls of the latter and so that its upper portion is folded back onto the upper portion of the outer walls of said carton, the rear sheet of said bag being pulled away from said supporting rods and the suction of the front sheet of said bag being interrupted when said bag is driven towards the inner volume of said carton.
EP10290110.5A 2010-03-05 2010-03-05 Machine and method for lining packing boxes with plastic bags Active EP2363281B1 (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
EP10290110.5A EP2363281B1 (en) 2010-03-05 2010-03-05 Machine and method for lining packing boxes with plastic bags

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EP2363281B1 true EP2363281B1 (en) 2014-11-05

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Publication number Priority date Publication date Assignee Title
CN113978038B (en) * 2021-11-19 2023-02-10 昆山市鼎佳电子材料有限公司 Environment-friendly corrugated box production facility

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Publication number Priority date Publication date Assignee Title
US5029728A (en) * 1989-12-22 1991-07-09 W. R. Grace & Co.-Conn. Method and apparatus for dispensing packaging bags
JP3122931B2 (en) * 1996-09-12 2001-01-09 武三 石丸 Inner bag insertion device for cardboard case packaging
JP2004074569A (en) * 2002-08-19 2004-03-11 Ishii Ind Co Ltd Bag laying apparatus
JP2005008215A (en) * 2003-06-19 2005-01-13 Si Seiko Co Ltd Filling and packaging device

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