EP3362276B1 - Method and machine for manufacturing a bag comprising handles - Google Patents

Method and machine for manufacturing a bag comprising handles Download PDF

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Publication number
EP3362276B1
EP3362276B1 EP16794696.1A EP16794696A EP3362276B1 EP 3362276 B1 EP3362276 B1 EP 3362276B1 EP 16794696 A EP16794696 A EP 16794696A EP 3362276 B1 EP3362276 B1 EP 3362276B1
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EP
European Patent Office
Prior art keywords
drum
handle
placement
legs
turning
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.)
Active
Application number
EP16794696.1A
Other languages
German (de)
French (fr)
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EP3362276A1 (en
Inventor
Thomas Fichtner
Vincent SCHALCK
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.)
Holweg Group SAS
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Holweg Group SAS
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Publication date
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Publication of EP3362276A1 publication Critical patent/EP3362276A1/en
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Publication of EP3362276B1 publication Critical patent/EP3362276B1/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
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/86—Forming integral handles or mounting separate handles
    • B31B70/864—Mounting separate handles on bags, sheets 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
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • 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
    • B31B70/74—Auxiliary operations
    • B31B70/86—Forming integral handles or mounting separate handles
    • B31B70/876—Forming integral handles or mounting separate handles involving application of reinforcement strips or patches; involving reinforcements obtained by folding
    • 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
    • B31D—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
    • B31D1/00—Multiple-step processes for making flat articles ; Making flat articles
    • B31D1/06—Multiple-step processes for making flat articles ; Making flat articles the articles being handles
    • 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
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents

Definitions

  • the present invention relates to a method and a machine for making bags such as square bottom bags, having flat handles made of folded, cut, glued materials.
  • Bags are used, in particular in commerce, for customers to take their purchases. Such bags are sometimes made of paper, partially or totally, and have a tubular part open at one end and closed at the other end by a bottom, for example of rectangular or square shape. These bags are called square bottom bags. Some of these bags are fitted with handles so that they can be easily transported.
  • the handles are developed on a fixed station. During this development, the legs of the handles are oriented in the direction of travel of the strip. The legs are clamped between a cylinder which guides the belt and a segment transport. The drive of the handles is brutal, the handles having to change from a very low speed to the running speed of the web very quickly. This insertion of the handles is a cause of limiting the production rate of the bags.
  • the handle is formed on a rotating drum, the periphery of which is tangent to the path of the wall.
  • the drum receives along a generator a strip of previously cut material forming a strap which it maintains at two points.
  • the strap is retained during the rotation of the drum so as to fold it near the holding points in an oblique fold and form the legs of the handle at right angles to a cross member held between the two holding points.
  • the legs of the handles are folded back on themselves by a folding station to form a base, before being deposited and glued by the base to the wall of the bag.
  • a blade carried by a folding roller marks the fold on the legs, which raises the bases.
  • a folding bar that moves faster than the periphery of the drum drives the bases to fold them over the legs.
  • Retaining means temporarily fix the handle along the wall of the bag, until the user of the bag goes against these retaining means to deploy the handle.
  • this arrangement does not allow reinforcement sheets to be fitted since the space normally covered by such sheets is already occupied by the folded handle. Thus, the load admitted by such bags is limited.
  • one acts against the provisional holding means by moving the handles away from one another. In the end, a concentrated traction is exerted in particular on the bonding of the base to the wall at the junction with the rest of the handle. This concentration of traction is liable to initiate rapid tearing at this level either of the wall or of the bonding.
  • the invention therefore aims to provide a method of manufacturing a bag provided with handles with or without reinforcing sheets allowing high speeds and a machine implementing such a method.
  • the handle placed on the wall has its legs forward and crosses it backwards as shown in figure 7a .
  • the legs are glued to the wall and the crossbars are located beyond the edge of the bag.
  • the installation can be done before the separation of the bags, on the inside or outside of the bag.
  • the wall is first cut transversely so that the handles are placed over these notches, the final cutting of the bag being carried out in the extension of the notches.
  • two handling stations are used, arranged side by side or offset longitudinally.
  • the laying can also be done after the separation of the hose into sections, before or after the formation of the bottom on the sections, and in this case typically outside them.
  • the cross member of the handle is gripped by the turning drum tangent to the periphery of the laying drum, and through a blade carried by the turning drum, the end of the legs is introduced. in a clamp of the laying drum and the cross member is released by bringing the handle against the periphery of the laying drum.
  • the turning is done in the continuity of the rotation of the laying drum and that of the turning drum. No sudden acceleration is imparted to the handle in this operation, which makes it possible to obtain a high rate.
  • the cross member is moved away from the periphery of the laying drum by the turning drum. By grasping the ends of the legs, the laying drum drives them past the cross member which is retained by the turning drum, so that the legs pass forward.
  • At least one reinforcing sheet is deposited while at least partially covering at least one leg before the handle is turned over. After turning over, the backing sheet will be on the side of the laying drum, then cover the leg (s) being glued to the wall. This technique is applicable for the installation of handles both inside and outside of bags. The connection of the handle with the wall is thus reinforced.
  • the speed of rotation of the laying drum is controlled during a rotation of one revolution to place the handle on the speed of the wall and at the interval between two successive bags. This allows the process to be used to make bags of variable length, not conditioned by the perimeter of the drum. In the period between two successive poses, the speed of the drum is free and can be slowed down to allow a greater length of the wall to pass to make long bags, or on the contrary accelerated to make short bags. The speed is adjusted again during the laying period to match the speed of the wall.
  • the subject of the invention is also a machine for manufacturing bags with handles comprising transport means for passing a wall of the bag along a handle-laying drum mounted to rotate, hooking means for hanging a handle on it.
  • the drum the legs of the handle extending along a perimeter of the drum towards the rear in the direction of rotation of the drum, the legs being connected by a cross member, the hooking means being configured to place the handle on the wall , characterized in that it comprises a turning drum for turning the handle before the handle is placed on the wall and for the legs to be at the front on the laying drum.
  • the turning drum is rotating and tangent to the periphery of the laying drum and includes a cross member clamp for gripping the handle by the cross member as it passes between the laying drum and the drum. reversal and a blade adapted to introduce the end of the legs into a leg clamp of the laying drum, the cross member being configured to release the cross member after the legs are pinched by the leg clamp, the machine further comprising guide means for returning the handle against the periphery of the laying drum after the turning drum and before laying the handle.
  • the machine comprises a station for depositing the reinforcing sheet upstream of the turning drum for deposit at least one reinforcing sheet while at least partially covering at least one leg.
  • the machine comprises control means for controlling the speed of rotation of the laying drum during a rotation of one turn and placing the handle at the speed of the wall and at the interval between two successive bags. .
  • the turning station is completed or replaced by a folding station for folding and folding the legs in two parts one on the other along a folding line, the cross-side part being called the shoulder strap while that the remaining part is called the base.
  • the gluing of the handle to the wall is done by the bases, the cross member being as close as possible to the bottom.
  • the turning station is either dismantled or not used.
  • the turning station can also be transformed into a folding station, as will be seen better below.
  • a guide bar moving faster than the periphery of the drum is used to drive, fold and fold the bases on the shoulder straps.
  • a reinforcing sheet laying station is also used by at least partially covering the base with at least one leg before the base is folded by gluing the reinforcing sheet on the base and the wall.
  • a bag making machine comprises in a manner known per se a station 9 for forming a hose 1 from a strip of a flexible material 1a such as raw or pre-printed paper, an aluminum or plastic film or the like or a mixture of these materials.
  • the strip of material 1a is unwound from a reel onto a reel, not shown. It can be printed beforehand or at the exit of the dispenser.
  • the hose 1 is generally formed with bellows, but this characteristic does not affect the invention which could be used on bags without gussets.
  • the machine then comprises successively, in the direction of transport of the hose 1, two gluing stations 2, two handling stations 3 according to the invention and facing each other, a cutting station 6 , a bottom forming station 7 then a stacking station 8.
  • the document WO 2013/190208 A1 shows an example of a bottom forming station 7.
  • the handle laying stations 3 comprise laying drums 30 placed opposite one another to deposit handles on one and the other of the walls of the hose 1, so that the handles will be on the outside of the bag.
  • the handles 4 are placed on the strip of material 1a before forming the hose 1.
  • the machine has two stations for placing handles 3, arranged in an offset manner both in the direction of the strip of material 1a and transversely to this direction.
  • the handles 4 are placed on the bags already formed, at the exit of the folding station 7.
  • the two handling stations 3 are placed downstream of the folding station 7, one facing the other.
  • the handles are placed after cutting the hose into sections but before forming the bottom.
  • the figure 8a shows two offset gluing stations each with an individual presser 3a.
  • each handle 4 comprises a cross member 40 connecting two legs 41 substantially at right angles, as can be seen for example on the figure 9 .
  • Each laying drum 30 is rotated so that its peripheral speed is the same than the running speed of the hose 1 which passes in front of it when the handles are removed.
  • the handling station 3 comprises hooking means for hooking the handle 4 on the drum such that the legs 41 of the handle 4 extend along a perimeter of the drum 30 towards the rear in the direction of rotation. of the drum.
  • FIG. 3 it further comprises a distribution roller 31 for depositing on the drum 30 strips which will form the handles 4 by folding the legs 41, in a manner which is not detailed here, optionally a device 33 for depositing sheets of reinforcement 5, and a turning drum 37 for turning the handle before the handle 4 is placed on the wall and so that the legs 41 are at the front on the laying drum.
  • the turning drum 37 mounted counter-rotating with respect to the laying drum, is tangent to the periphery of the laying drum 30 and comprises a cross member clamp 370 for gripping the handle by the cross member 40 during its passage between the laying drum 30 and the turning drum 37 and a blade 371 adapted to insert the end of the legs 41 into a leg clamp 302 of the laying drum 30.
  • the cross member clamp 370 is configured to release the cross member 40 after the legs 41 have been pinched by the leg clamp 302.
  • the laying station 3 further comprises guide means 38 for returning the handle against the periphery of the laying drum 30 after the turning drum 37 and before placing the handle 4 on the wall 1.
  • the gluing station 2 deposits glue on the wall 1 in the areas intended to receive the legs 41 of the handles 4 and the possible reinforcing sheet 5.
  • a strap is deposited by the distribution roller 31 on the laying drum 30 and held thereon by the hooking means which clamp the cross member 40, during the formation of the handle 4.
  • the parts of the strap on either side of the cross member 40 are folded in a 45 ° fold so as to form the legs 41 at 90 ° relative to the cross member 40.
  • glue is deposited on the legs 41 by the device 32 and a reinforcing sheet 5 is deposited on the legs 41 of the handle 4.
  • the turning drum 37 drives with it the crossmember 40, as shown in figure 5 .
  • the blade 371 then arrives at the level of the end of the legs 41 and pushes the latter between the jaws of the leg clamp 302.
  • the jaws grip the end of the legs 41, while the blade 371 is released.
  • the cross member 40 is then released by the cross member clamp 370 of the turning drum 37.
  • the guide means 38 obstruct the cross member 40 and force it to come behind the leg clamp 302 which retains the legs 41, as show it figures 6 and 7 .
  • the possible backing sheet 5 is thus placed between the periphery of the laying drum 30 and the legs 41.
  • the handle 4 is completely turned over, as shown in the figure. figure 7 , then is deposited on the wall 1 which has locally received glue.
  • the figure 8 exclusively shows the gluing station 2 and the handling station 3, according to a fourth embodiment using a machine according to the invention.
  • This embodiment differs from the previous three in that the laying station does not include a turning drum 37, but a glue application device 32 followed by a folding device.
  • the turning drum 37 can be used by neutralizing the gripper 370, and by operating the blade 371 with an offset with another gripper 301.
  • the same machine can be used to implement the method described above or the one which will be described below.
  • the legs 41 are divided into two parts along a fold line 410, the cross-side part 40 being called the sling 411 while the remaining part is called the base 412.
  • the figures 9 to 12 show the drum 30 schematically.
  • the laying drum 30 comprises clamps 301 making it possible to each grip a leg 41 of the handle 4 along the future fold lines 410 between the base 412 and the strap 411.
  • the glue is deposited on the bases 412.
  • the station 3 further comprises a folding blade 34 mounted to rotate and a folding bar 35 mounted to pivot about an axis slightly eccentric with respect to the axis of the drum 30.
  • the function of the blade Folding 34 can be achieved by the folding blade 371 of the turning roller 37.
  • the folding bar 35 is movably mounted between a retracted position as shown in the figures. figures 8 and 10 and a folding position shown in the figure 12 and in mixed lines on the figure 8 .
  • the folding blade 34 is configured to form the fold, which also results in raising the bases 412 after their passage to the right of the folding bar 35 in the retracted position, so that the bases 412 are driven by the bar. folding 35 in its path to the folding position. The path of the fold bar 35 between these two positions is such that the fold bar 35 approaches the surface of the drum 30 as it moves from the retracted position to the fold position.
  • the turning drum 37 can fulfill the role of the device 34 by using the folding blade 371 and overriding the cross clamp 370.
  • the folding bar 35 can also be removable, which allows the same machine to be converted into a machine according to the specification. one of the first three machine embodiments according to the fourth embodiment. In this case, the clamp 302 is for example removable and is replaced by the clamp 301 to adapt its position and its functionality.
  • the machine further comprises a device 33 for placing reinforcing sheets 5 in order to deposit a reinforcing sheet 5 on each handle 4, while covering the straps 411, as shown in FIG. figure 9 , between the roll of distribution 31 of the handles 4 and the travel zone of the folding bar 35.
  • the hose 1 passes between the two drums 30 for placing the handles 4 and runs in the direction of the arrow F1, the drums 30 being in rotation synchronously with the hose 1.
  • Each distribution roller 31 deposits a strap for form a handle 4 on the drum 30 which then grasps the handle 4 by the legs 41 using the clamps 301.
  • the cross member 40 is deposited at the front relative to the direction of rotation of the drum 30.
  • the adhesive application device 32 deposits the adhesive on the bases 412
  • the depositing device 33 deposits the backing sheet 5 on the straps 411 of the handle 4, as shown in figure figure 9 .
  • the folding blade 34 lifts the bases 412, while the folding bar 35 accelerates to catch up with the handle 4 by dragging the bases 412 with it, so as to fold them over the straps 411, trapping the reinforcement sheet 5, as shown on figure 11 .
  • the folding bar 35 stops its movement when it arrives at the folding position, just before the air gap 36 between the two drums 30. In this position, the bases 412 are placed against the straps 411, as shown in the figure. figure 12 .
  • the bases 412 and the reinforcing sheet 5 come into contact with the wall 1 on which the bonding is carried out by pressing, being opposite a glued zone 10 deposited on the hose beforehand by the gluing station 2.
  • the clamps 301 release the legs 41 so that the handle 4 is transferred to the hose 1.
  • a zone glued to the wall comes into contact with the cross member 40 to thus hold it against the wall, which forms holding means 42.
  • the reinforcing sheet 5 ' is deposited in a position such that it covers the legs 41 on either side of the fold line 410, and therefore both on the bases 412 and on the straps 411, so so that it is folded with the bases 412 during the operation folding.
  • the rest of the process is identical to the fourth embodiment.
  • the bag obtained makes it possible to have a reinforcing sheet 5 'glued to the wall of the bag over the height of the bases 412 and a flap 50 which extends beyond the fold line 410, as shown on the figure. figure 18 .
  • the folding of the legs 41 is carried out on the distribution roller 31 and not on the drum 30.
  • This arrangement allows the handle 4 to have the opposite face once deposited on the wall 1. , in comparison to the mode shown in figure 3 .
  • This variant is also applicable to all the other embodiments.
  • the invention is not limited to the embodiments which have just been described by way of example.
  • the backing sheet 5 can be separated to apply in two pieces, one for each base. It can also extend over the entire length of the bases, or even beyond or on the contrary below the ends opposite to the fold line. One could lay the handles side by side on the band before forming the hose so that the handles are then found inside the bag.
  • the machine can be adapted to receive either the turning drum or the folding station.
  • the same machine can thus be easily modified to modify the type of bags produced.
  • the machine may also include, on the periphery of the laying drum, both the turning drum and the folding device, in a manner offset along the periphery. It goes without saying that in this configuration, these two devices are not in service simultaneously.
  • An inversion station can be inserted between the handle placement station and the hose forming station.
  • the inversion station allows the top and bottom of the band 1a to be reversed.
  • the handles placed are found inside or outside the bag.
  • the handle could be transported by means of transport between the laying drum 30 and the wall 1.

Description

Domaine techniqueTechnical area

La présente invention se rapporte à un procédé et une machine pour fabriquer des sacs tels que des sacs à fond carré, comportant des poignées plates constituées de matériaux pliés, coupés, collés.The present invention relates to a method and a machine for making bags such as square bottom bags, having flat handles made of folded, cut, glued materials.

Etat de la techniqueState of the art

On utilise, en particulier dans le commerce, des sacs prévus pour que les clients emportent leurs achats. De tels sacs sont parfois fabriqués en papier, partiellement ou en totalité, et comportent une partie tubulaire ouverte à une extrémité et fermée à l'autre extrémité par un fond, par exemple de forme rectangulaire ou carrée. Ces sacs sont appelés sacs à fond carré. On dote certains de ces sacs de poignées afin de pouvoir les transporter facilement.Bags are used, in particular in commerce, for customers to take their purchases. Such bags are sometimes made of paper, partially or totally, and have a tubular part open at one end and closed at the other end by a bottom, for example of rectangular or square shape. These bags are called square bottom bags. Some of these bags are fitted with handles so that they can be easily transported.

On connait par le document US 3,439,591 un procédé de fabrication de sacs comportant de telles poignées. En partant d'une bande de papier continue, on réalise des entailles transversales et on dépose des poignées en forme de U de part et d'autre des entailles, en collant des jambes des poignées sur la bande sur un côté seulement de l'entaille. Des feuilles de renfort sont déposées par collage sur chaque jambe afin de renforcer la liaison avec la paroi du sac. Ensuite, la bande est repliée sur elle-même afin de former un boyau, lequel est débité en tronçons dans le prolongement des entailles. Un fond est formé par pliage et collage de rabats à l'extrémité du tronçon opposée à celle qui porte les poignées. Le sac est ainsi terminé, avec des poignées qui dépassent de l'extrémité ouverte du sac. Ce document montre par ailleurs une station de fabrication de poignées. Une telle machine nécessite une station d'empilage spécifique, du fait de l'encombrement des poignées qui dépassent du corps du sac.We know from the document US 3,439,591 a method of manufacturing bags comprising such handles. Starting from a continuous strip of paper, transverse notches are made and U-shaped handles are placed on either side of the notches, gluing the legs of the handles to the strip on only one side of the notch . Reinforcement sheets are deposited by gluing on each leg in order to strengthen the connection with the wall of the bag. Then, the strip is folded back on itself to form a hose, which is cut into sections in the extension of the notches. A bottom is formed by folding and gluing flaps at the end of the section opposite to that which carries the handles. The bag is thus finished, with handles that protrude from the open end of the bag. This document also shows a handle manufacturing station. Such a machine requires a stacking station specific, due to the size of the handles which protrude from the body of the bag.

Les poignées sont élaborées sur une station fixe. Lors de cette élaboration, les jambes des poignées sont orientées dans le sens de défilement de la bande. Les jambes sont pincées entre un cylindre qui guide la bande et un transport à segment. L'entraînement des poignées est brutal, les poignées devant passer d'une vitesse très faible à la vitesse de défilement de la bande très rapidement. Cette insertion des poignées est une cause de limitation de la cadence de fabrication des sacs.The handles are developed on a fixed station. During this development, the legs of the handles are oriented in the direction of travel of the strip. The legs are clamped between a cylinder which guides the belt and a segment transport. The drive of the handles is brutal, the handles having to change from a very low speed to the running speed of the web very quickly. This insertion of the handles is a cause of limiting the production rate of the bags.

Il est proposé dans le document US 5,609,556 de prévoir les poignées de manière à ce qu'elles ne dépassent pas de l'ouverture du sac. Ceci limite l'encombrement du sac pour le stockage et le transport. Pour cela, la poignée est formée sur un tambour rotatif dont la périphérie tangente la trajectoire de la paroi. Le tambour reçoit le long d'une génératrice une bande de matière préalablement coupée formant une lanière qu'il maintient en deux points. La lanière est retenue lors de la rotation du tambour de manière à la plier près des points de maintien selon un pli oblique et former les jambes de la poignée à angle droit par rapport à une traverse maintenue entre les deux points de maintien. Ensuite, les jambes des poignées sont repliées sur elles-mêmes par une station de pliage pour former une base, avant d'être déposées et collées par la base sur la paroi du sac. Au niveau de la station de pliage, une lame portée par un rouleau de pliage marque le pli sur les jambes, ce qui fait se relever les bases. Une barre de pliage qui se déplace plus rapidement que la périphérie du tambour entraîne les bases pour les replier sur les jambes.It is proposed in the document US 5,609,556 provide the handles so that they do not protrude from the opening of the bag. This limits the size of the bag for storage and transport. For this, the handle is formed on a rotating drum, the periphery of which is tangent to the path of the wall. The drum receives along a generator a strip of previously cut material forming a strap which it maintains at two points. The strap is retained during the rotation of the drum so as to fold it near the holding points in an oblique fold and form the legs of the handle at right angles to a cross member held between the two holding points. Then, the legs of the handles are folded back on themselves by a folding station to form a base, before being deposited and glued by the base to the wall of the bag. At the folding station, a blade carried by a folding roller marks the fold on the legs, which raises the bases. A folding bar that moves faster than the periphery of the drum drives the bases to fold them over the legs.

Des moyens de maintien fixent temporairement la poignée le long de la paroi du sac, jusqu'à ce que l'utilisateur du sac aille à l'encontre de ces moyens de maintien pour déployer la poignée. Cependant, cette disposition ne permet pas de poser des feuilles de renfort puisque l'espace normalement couvert par de telles feuilles est déjà occupé par la poignée repliée. Ainsi, la charge admise par de tels sacs est limitée. De plus, lors de l'utilisation du sac, on agit à rencontre des moyens de maintien provisoires en écartant les poignées l'une de l'autre. Au final, on exerce une traction concentrée en particulier sur le collage de la base sur la paroi à la jonction avec le reste de la poignée. Cette concentration de la traction est susceptible d'amorcer un déchirement rapide à ce niveau soit de la paroi, soit du collage.Retaining means temporarily fix the handle along the wall of the bag, until the user of the bag goes against these retaining means to deploy the handle. However, this arrangement does not allow reinforcement sheets to be fitted since the space normally covered by such sheets is already occupied by the folded handle. Thus, the load admitted by such bags is limited. Moreover, when of the use of the bag, one acts against the provisional holding means by moving the handles away from one another. In the end, a concentrated traction is exerted in particular on the bonding of the base to the wall at the junction with the rest of the handle. This concentration of traction is liable to initiate rapid tearing at this level either of the wall or of the bonding.

Par ailleurs, l'utilisation d'un tambour pour la pose des poignées permet d'obtenir de plus grandes cadences, puisque la poignée a déjà atteint la vitesse de défilement de la bande.Furthermore, the use of a drum for the installation of the handles makes it possible to obtain greater rates, since the handle has already reached the running speed of the strip.

Description de l'inventionDescription of the invention

L'invention vise donc à fournir un procédé de fabrication d'un sac muni de poignées avec ou sans feuilles de renfort permettant de hautes cadences et une machine mettant en œuvre un tel procédé.The invention therefore aims to provide a method of manufacturing a bag provided with handles with or without reinforcing sheets allowing high speeds and a machine implementing such a method.

Avec ces objectifs en vue, l'invention a pour objet un procédé de fabrication d'un sac selon lequel :

  • on fait passer une paroi du sac le long d'un tambour de pose de poignées monté rotatif ;
  • on accroche une poignée sur le tambour, des jambes de la poignée s'étendant selon un périmètre du tambour vers l'arrière dans le sens de rotation du tambour, les jambes étant reliées par une traverse ;
  • on dépose la poignée sur la paroi ;
caractérisé en ce qu'avant la dépose de la poignée sur la paroi, on retourne complètement celle-ci à l'aide d'un tambour de retournement pour que les jambes soient à l'avant sur le tambour de pose.With these objectives in view, the invention relates to a method of manufacturing a bag according to which:
  • a wall of the bag is passed along a rotatably mounted handle setting drum;
  • a handle is hung on the drum, the legs of the handle extending along a perimeter of the drum towards the rear in the direction of rotation of the drum, the legs being connected by a cross member;
  • the handle is placed on the wall;
characterized in that before placing the handle on the wall, the latter is completely turned over using a turning drum so that the legs are at the front on the laying drum.

En retournant la poignée avant sa pose sur la paroi, la poignée posée sur la paroi a les jambes vers l'avant et la traverse vers l'arrière comme illustré à la figure 7a. Typiquement, les jambes sont collées sur la paroi et les traverses sont situées au-delà du bord du sac. La pose peut être faite avant la séparation des sacs, du côté intérieur ou extérieur du sac. Dans ce cas, la paroi est préalablement entaillée transversalement afin que les poignées soient déposées par-dessus ces entailles, la découpe finale du sac étant effectuée dans le prolongement des entailles. On utilise dans ce cas deux stations de dépose de poignées, disposées côte à côte ou décalées longitudinalement. La pose peut être faite également après la séparation du boyau en tronçons, avant ou après la formation du fond sur les tronçons, et dans ce cas typiquement à l'extérieur de ceux-ci. Comme la pose des poignées est réalisée dans un processus continu, sans accélération brusque de celles-ci, on peut réaliser la pose des poignées à une grande cadence, à plus de 250 pièces à la minute.By turning the handle over before it is placed on the wall, the handle placed on the wall has its legs forward and crosses it backwards as shown in figure 7a . Typically, the legs are glued to the wall and the crossbars are located beyond the edge of the bag. The installation can be done before the separation of the bags, on the inside or outside of the bag. In this case, the wall is first cut transversely so that the handles are placed over these notches, the final cutting of the bag being carried out in the extension of the notches. In this case, two handling stations are used, arranged side by side or offset longitudinally. The laying can also be done after the separation of the hose into sections, before or after the formation of the bottom on the sections, and in this case typically outside them. As the installation of the handles is carried out in a continuous process, without abrupt acceleration of the latter, it is possible to carry out the installation of the handles at a high rate, at more than 250 pieces per minute.

Selon une disposition constructive, pour effectuer le retournement, on saisit la traverse de la poignée par le tambour de retournement tangent à la périphérie du tambour de pose, on introduit, grâce à une lame portée par le tambour de retournement, l'extrémité des jambes dans une pince du tambour de pose et on relâche la traverse en ramenant la poignée contre la périphérie du tambour de pose. Le retournement se fait dans la continuité de la rotation du tambour de pose et de celle du tambour de retournement. Aucune accélération brusque n'est conférée à la poignée dans cette opération, ce qui permet d'obtenir une cadence importante. La traverse est éloignée de la périphérie du tambour de pose par le tambour de retournement. En saisissant l'extrémité des jambes, le tambour de pose entraîne celles-ci au-delà de la traverse qui est retenue par le tambour de retournement, de telle sorte que les jambes passent à l'avant.According to a constructive arrangement, to perform the turning, the cross member of the handle is gripped by the turning drum tangent to the periphery of the laying drum, and through a blade carried by the turning drum, the end of the legs is introduced. in a clamp of the laying drum and the cross member is released by bringing the handle against the periphery of the laying drum. The turning is done in the continuity of the rotation of the laying drum and that of the turning drum. No sudden acceleration is imparted to the handle in this operation, which makes it possible to obtain a high rate. The cross member is moved away from the periphery of the laying drum by the turning drum. By grasping the ends of the legs, the laying drum drives them past the cross member which is retained by the turning drum, so that the legs pass forward.

Selon un perfectionnement, on dépose au moins une feuille de renfort en recouvrant au moins partiellement au moins une jambe avant le retournement de la poignée. Après le retournement, la feuille de renfort sera du côté du tambour de pose, puis recouvrira la ou les jambes en étant collée sur la paroi. Cette technique est applicable pour la pose de poignées à la fois en intérieur ou en extérieur des sacs. La liaison de la poignée avec la paroi est ainsi renforcée.According to an improvement, at least one reinforcing sheet is deposited while at least partially covering at least one leg before the handle is turned over. After turning over, the backing sheet will be on the side of the laying drum, then cover the leg (s) being glued to the wall. This technique is applicable for the installation of handles both inside and outside of bags. The connection of the handle with the wall is thus reinforced.

Selon un autre perfectionnement, on pilote la vitesse de rotation du tambour de pose lors d'une rotation d'un tour pour poser la poignée à la vitesse de la paroi et à l'intervalle séparant deux sacs successifs. Ceci permet d'utiliser le procédé pour fabriquer des sacs de longueur variable, non conditionnée par le périmètre du tambour. Dans la période entre deux poses successives, la vitesse du tambour est libre et peut être ralentie pour laisser passer une plus grande longueur de paroi pour faire des sacs longs, ou au contraire accélérée pour faire des sacs courts. La vitesse est ajustée à nouveau pendant la période de pose pour correspondre à la vitesse de défilement de la paroi.According to another improvement, the speed of rotation of the laying drum is controlled during a rotation of one revolution to place the handle on the speed of the wall and at the interval between two successive bags. This allows the process to be used to make bags of variable length, not conditioned by the perimeter of the drum. In the period between two successive poses, the speed of the drum is free and can be slowed down to allow a greater length of the wall to pass to make long bags, or on the contrary accelerated to make short bags. The speed is adjusted again during the laying period to match the speed of the wall.

L'invention a aussi pour objet une machine de fabrication de sacs avec poignées comportant des moyens de transport pour faire passer une paroi du sac le long d'un tambour de pose de poignées monté rotatif, des moyens d'accrochage pour accrocher une poignée sur le tambour, des jambes de la poignée s'étendant selon un périmètre du tambour vers l'arrière dans le sens de rotation du tambour, les jambes étant reliées par une traverse, les moyens d'accrochage étant configurés pour déposer la poignée sur la paroi, caractérisée en ce qu'elle comporte un tambour de retournement pour retourner la poignée avant la dépose de la poignée sur la paroi et pour que les jambes soient à l'avant sur le tambour de pose.The subject of the invention is also a machine for manufacturing bags with handles comprising transport means for passing a wall of the bag along a handle-laying drum mounted to rotate, hooking means for hanging a handle on it. the drum, the legs of the handle extending along a perimeter of the drum towards the rear in the direction of rotation of the drum, the legs being connected by a cross member, the hooking means being configured to place the handle on the wall , characterized in that it comprises a turning drum for turning the handle before the handle is placed on the wall and for the legs to be at the front on the laying drum.

Selon une disposition constructive, pour effectuer le retournement, le tambour de retournement est rotatif et tangent à la périphérie du tambour de pose et comporte une pince de traverse pour saisir la poignée par la traverse lors de son passage entre le tambour de pose et le tambour de retournement et une lame apte à introduire l'extrémité des jambes dans une pince de jambe du tambour de pose, la pince de traverse étant configurée pour relâcher la traverse après le pincement des jambes par la pince de jambe, la machine comportant en outre des moyens de guidage pour ramener la poignée contre la périphérie du tambour de pose après le tambour de retournement et avant la pose de la poignée.According to a constructive arrangement, to perform the turning, the turning drum is rotating and tangent to the periphery of the laying drum and includes a cross member clamp for gripping the handle by the cross member as it passes between the laying drum and the drum. reversal and a blade adapted to introduce the end of the legs into a leg clamp of the laying drum, the cross member being configured to release the cross member after the legs are pinched by the leg clamp, the machine further comprising guide means for returning the handle against the periphery of the laying drum after the turning drum and before laying the handle.

Selon un perfectionnement, la machine comporte une station de dépose de feuille de renfort en amont du tambour de retournement pour déposer au moins une feuille de renfort en recouvrant au moins partiellement au moins une jambe.According to an improvement, the machine comprises a station for depositing the reinforcing sheet upstream of the turning drum for deposit at least one reinforcing sheet while at least partially covering at least one leg.

Selon un autre perfectionnement, la machine comporte des moyens de pilotage pour piloter la vitesse de rotation du tambour de pose lors d'une rotation d'un tour et poser la poignée à la vitesse de la paroi et à l'intervalle séparant deux sacs successifs.According to another improvement, the machine comprises control means for controlling the speed of rotation of the laying drum during a rotation of one turn and placing the handle at the speed of the wall and at the interval between two successive bags. .

Selon différents modes de réalisation :

  • la machine comporte une station de formation d'un boyau placée en aval du tambour de pose ;
  • la machine comporte une station de formation d'un boyau placée en amont du tambour de pose et une station de formation de fond en aval du tambour de pose ;
  • la machine comporte une station de formation d'un boyau placée en amont d'une station de formation de fond, laquelle est en amont du tambour de pose.
According to different embodiments:
  • the machine comprises a station for forming a hose placed downstream of the laying drum;
  • the machine comprises a station for forming a hose placed upstream of the laying drum and a bottom forming station downstream of the laying drum;
  • the machine comprises a station for forming a hose placed upstream of a bottom forming station, which is upstream of the laying drum.

Selon une variante, la station de retournement est complétée ou remplacée par une station de pliage pour plier et rabattre les jambes en deux parties l'une sur l'autre le long d'une ligne de pliage, la partie côté traverse étant nommée bretelle tandis que la partie restante est appelée la base. Ainsi, le collage de la poignée sur la paroi est fait par les bases, la traverse étant au plus près du fond. Lors de l'utilisation de la station de pliage, la station de retournement est démontée ou n'est pas utilisée. La station de retournement peut aussi être transformée en station de pliage, comme on le verra mieux par la suite. Par cette disposition, la machine peut être utilisée pour la fabrication de différents modèles, avec des poignées droites qui dépassent du bord du sac ou avec des poignées pliées qui ne dépassent pas.According to a variant, the turning station is completed or replaced by a folding station for folding and folding the legs in two parts one on the other along a folding line, the cross-side part being called the shoulder strap while that the remaining part is called the base. Thus, the gluing of the handle to the wall is done by the bases, the cross member being as close as possible to the bottom. When using the folding station, the turning station is either dismantled or not used. The turning station can also be transformed into a folding station, as will be seen better below. By this arrangement, the machine can be used for the manufacture of various models, with straight handles which protrude from the edge of the bag or with folded handles which do not protrude.

Pour le pliage, selon une disposition constructive, on utilise une barre de guidage se déplaçant plus rapidement que la périphérie du tambour pour entraîner, rabattre et plier les bases sur les bretelles.For the folding, according to a constructive arrangement, a guide bar moving faster than the periphery of the drum is used to drive, fold and fold the bases on the shoulder straps.

En perfectionnement, on utilise aussi une station de pose de feuille de renfort en recouvrant au moins partiellement la base d'au moins une jambe avant le pliage de la base en collant la feuille de renfort sur la base et la paroi.In development, a reinforcing sheet laying station is also used by at least partially covering the base with at least one leg before the base is folded by gluing the reinforcing sheet on the base and the wall.

Selon d'autres dispositions :

  • on dépose la feuille de renfort dans une position telle que la feuille de renfort est pliée avec les bases lors de l'opération de pliage. On forme ainsi un rabat sans ajouter de moyens spécifiques pour le plier, en profitant de l'opération de pliage des jambes. Un tel rabat renforce la résistance au déchirement de la feuille de renfort, dans une zone particulièrement sollicitée.
  • on encolle des bases avant leur pliage contre la feuille de renfort.
According to other provisions:
  • the backing sheet is laid in a position such that the backing sheet is folded with the bases during the folding operation. A flap is thus formed without adding specific means for folding it, taking advantage of the operation of folding the legs. Such a flap reinforces the resistance to tearing of the backing sheet, in a particularly stressed area.
  • the bases are glued before their folding against the backing sheet.

Brève description des figuresBrief description of the figures

L'invention sera mieux comprise et d'autres particularités et avantages apparaîtront à la lecture de la description qui va suivre, la description faisant référence aux dessins annexés parmi lesquels :

  • la figure 1 représente une vue de côté d'une machine de fabrication de sacs conforme à un premier mode de réalisation de l'invention ;
  • la figure 2 est une vue similaire à la figure 1 d'une machine selon un deuxième mode de réalisation de l'invention ;
  • la figure 2a est une vue similaire à la figure 1 d'une machine selon un troisième mode de réalisation de l'invention ;
  • la figure 3 est une vue du détail III de la figure 1 ;
  • les figures 4 à 7 sont des vues du détail IV de la figure 3 dans différentes phases du procédé mis en œuvre par la machine ;
  • les figures 4a et 7a sont des vues en perspective du tambour de pose dans une position correspondant respectivement à celle des figures 4 et 7 ;
  • la figure 8 représente une vue de côté d'une machine de fabrication de sacs conforme à un quatrième mode de réalisation, par modification de la machine selon l'invention et selon une première variante ;
  • la figure 8a représente une deuxième variante des premier et troisième modes de réalisation, dans lesquels les stations ne sont pas l'une en regard de l'autre mais décalées, comme dans le deuxième mode de réalisation ;
  • les figures 9 à 11 sont des vues en perspective d'un détail de la machine de la figure 8 selon différentes phases de la fabrication ;
  • la figure 12 est une vue de côté du détail des figures 9 à 11, dans une phase ultérieure ;
  • la figure 13 est une vue en perspective du boyau ayant reçu une poignée selon le quatrième mode de réalisation ;
  • la figure 14 est une vue en coupe du sac de la figure 13 selon le plan XIV- XIV;
  • les figures 15 et 16 sont des vues similaires respectivement aux figures 9 et 10 lors de la fabrication d'un sac selon une deuxième variante du quatrième mode de réalisation de l'invention ;
  • les figures 17 et 18 sont des vues similaires respectivement aux figures 13 et 14 du sac fabriqué selon le procédé des figures 15 et 16.
The invention will be better understood and other features and advantages will appear on reading the description which follows, the description referring to the appended drawings, among which:
  • the figure 1 shows a side view of a bag making machine according to a first embodiment of the invention;
  • the figure 2 is a view similar to figure 1 of a machine according to a second embodiment of the invention;
  • the figure 2a is a view similar to figure 1 of a machine according to a third embodiment of the invention;
  • the figure 3 is a view of detail III of the figure 1 ;
  • the figures 4 to 7 are views of detail IV of the figure 3 in different phases of the process implemented by the machine;
  • the figures 4a and 7a are perspective views of the laying drum in a position corresponding respectively to that of the figures 4 and 7 ;
  • the figure 8 shows a side view of a bag making machine according to a fourth embodiment, by modification of the machine according to the invention and according to a first variant;
  • the figure 8a shows a second variant of the first and third embodiments, in which the stations are not facing each other but offset, as in the second embodiment;
  • the figures 9 to 11 are perspective views of a detail of the machine from the figure 8 according to different stages of production;
  • the figure 12 is a side view of the detail of the figures 9 to 11 , in a later phase;
  • the figure 13 is a perspective view of the hose having received a handle according to the fourth embodiment;
  • the figure 14 is a sectional view of the bag of the figure 13 according to plan XIV-XIV;
  • the figures 15 and 16 are similar views respectively to figures 9 and 10 during the manufacture of a bag according to a second variant of the fourth embodiment of the invention;
  • the figures 17 and 18 are similar views respectively to figures 13 and 14 of the bag manufactured using the figures 15 and 16 .

DESCRIPTION DETAILLEEDETAILED DESCRIPTION

Une machine de fabrication de sacs selon un premier mode de réalisation de l'invention, tel que montrée sur la figure 1, comporte de manière connue en soi une station de formation 9 d'un boyau 1 à partir d'une bande d'un matériau 1a souple tel que du papier brut ou préimprimé, un film d'aluminium ou de plastique ou équivalent ou un mélange de ces matières. La bande de matériau 1a est dévidée d'une bobine sur un dévidoir, non représenté. Elle peut être imprimée préalablement ou à la sortie du dévidoir. Le boyau 1 est formé en général avec des soufflets, mais cette caractéristique n'a pas d'incidence sur l'invention qui pourrait être mise en œuvre sur des sacs sans soufflets. La machine comporte ensuite successivement, dans le sens du transport du boyau 1, deux stations d'encollage 2, deux stations de pose de poignées 3 conformes à l'invention et en regard l'une de l'autre, une station de coupe 6, une station de formation du fond 7 puis une station d'empilage 8. Le document WO 2013/190208 A1 montre un exemple de station de formation du fond 7. Les stations de pose de poignées 3 comportent des tambours de pose 30 placés en regard l'un de l'autre pour déposer des poignées sur l'une et l'autre des parois du boyau 1, de telle sorte que les poignées seront à l'extérieur du sac.A bag making machine according to a first embodiment of the invention, as shown in FIG. figure 1 , comprises in a manner known per se a station 9 for forming a hose 1 from a strip of a flexible material 1a such as raw or pre-printed paper, an aluminum or plastic film or the like or a mixture of these materials. The strip of material 1a is unwound from a reel onto a reel, not shown. It can be printed beforehand or at the exit of the dispenser. The hose 1 is generally formed with bellows, but this characteristic does not affect the invention which could be used on bags without gussets. The machine then comprises successively, in the direction of transport of the hose 1, two gluing stations 2, two handling stations 3 according to the invention and facing each other, a cutting station 6 , a bottom forming station 7 then a stacking station 8. The document WO 2013/190208 A1 shows an example of a bottom forming station 7. The handle laying stations 3 comprise laying drums 30 placed opposite one another to deposit handles on one and the other of the walls of the hose 1, so that the handles will be on the outside of the bag.

Dans un deuxième mode de réalisation, prévu pour que le sac ait des poignées à l'intérieur et montré sur la figure 2, les poignées 4 sont posées sur la bande de matériau 1a avant la formation du boyau 1. Pour cela, la machine comporte deux stations de pose de poignées 3, disposées de manière décalée à la fois selon la direction de la bande de matériau 1a et transversalement à cette direction.In a second embodiment, provided that the bag has handles inside and shown on the figure 2 , the handles 4 are placed on the strip of material 1a before forming the hose 1. For this, the machine has two stations for placing handles 3, arranged in an offset manner both in the direction of the strip of material 1a and transversely to this direction.

Dans un troisième mode de réalisation, prévu pour que le sac ait des poignées à l'extérieur et montré sur la figure 2a, les poignées 4 sont posées sur les sacs déjà formés, à la sortie de la station de pliage 7. Pour cela, les deux stations de pose de poignées 3 sont placées en aval de la station de pliage 7, l'une en regard de l'autre.In a third embodiment, provided that the bag has handles on the outside and shown on the figure 2a , the handles 4 are placed on the bags already formed, at the exit of the folding station 7. For this, the two handling stations 3 are placed downstream of the folding station 7, one facing the other.

Dans une variante non représentée, les poignées sont posées après la découpe du boyau en tronçons mais avant la formation du fond.In a variant not shown, the handles are placed after cutting the hose into sections but before forming the bottom.

La figure 8a montre deux stations d'encollage décalées avec chacune un presseur individuel 3a.The figure 8a shows two offset gluing stations each with an individual presser 3a.

Dans ces trois modes de réalisation, les stations de pose de poignées 3 sont arrangées de manière similaire qui va être décrite maintenant en référence aux figures 3 à 6. Chaque poignée 4 comporte une traverse 40 reliant deux jambes 41 sensiblement à angle droit, comme on le voit par exemple sur la figure 9. Chaque tambour de pose 30 est entraîné en rotation de telle sorte que sa vitesse périphérique soit la même que la vitesse de défilement du boyau 1 qui passe devant lui au moment de la dépose des poignées. La station de pose des poignées 3 comporte des moyens d'accrochage pour accrocher la poignée 4 sur le tambour de telle sorte que les jambes 41 de la poignée 4 s'étendent selon un périmètre du tambour 30 vers l'arrière dans le sens de rotation du tambour. En référence à la figure 3, elle comporte en outre un rouleau de distribution 31 pour déposer sur le tambour 30 des lanières qui formeront les poignées 4 par pliage des jambes 41, d'une manière qui n'est pas détaillée ici, optionnellement un dispositif de dépose 33 de feuilles de renfort 5, et un tambour de retournement 37 pour retourner la poignée avant la dépose de la poignée 4 sur la paroi et pour que les jambes 41 soient à l'avant sur le tambour de pose. Le tambour de retournement 37, monté contrarotatif par rapport au tambour de pose, est tangent à la périphérie du tambour de pose 30 et comporte une pince de traverse 370 pour saisir la poignée par la traverse 40 lors de son passage entre le tambour de pose 30 et le tambour de retournement 37 et une lame 371 apte à introduire l'extrémité des jambes 41 dans une pince de jambe 302 du tambour de pose 30. La pince de traverse 370 est configurée pour relâcher la traverse 40 après le pincement des jambes 41 par la pince de jambe 302. La station de pose 3 comporte en outre des moyens de guidage 38 pour ramener la poignée contre la périphérie du tambour de pose 30 après le tambour de retournement 37 et avant la pose de la poignée 4 sur la paroi 1.In these three embodiments, the handle setting stations 3 are arranged in a similar manner which will now be described with reference to figures 3 to 6 . Each handle 4 comprises a cross member 40 connecting two legs 41 substantially at right angles, as can be seen for example on the figure 9 . Each laying drum 30 is rotated so that its peripheral speed is the same than the running speed of the hose 1 which passes in front of it when the handles are removed. The handling station 3 comprises hooking means for hooking the handle 4 on the drum such that the legs 41 of the handle 4 extend along a perimeter of the drum 30 towards the rear in the direction of rotation. of the drum. With reference to the figure 3 , it further comprises a distribution roller 31 for depositing on the drum 30 strips which will form the handles 4 by folding the legs 41, in a manner which is not detailed here, optionally a device 33 for depositing sheets of reinforcement 5, and a turning drum 37 for turning the handle before the handle 4 is placed on the wall and so that the legs 41 are at the front on the laying drum. The turning drum 37, mounted counter-rotating with respect to the laying drum, is tangent to the periphery of the laying drum 30 and comprises a cross member clamp 370 for gripping the handle by the cross member 40 during its passage between the laying drum 30 and the turning drum 37 and a blade 371 adapted to insert the end of the legs 41 into a leg clamp 302 of the laying drum 30. The cross member clamp 370 is configured to release the cross member 40 after the legs 41 have been pinched by the leg clamp 302. The laying station 3 further comprises guide means 38 for returning the handle against the periphery of the laying drum 30 after the turning drum 37 and before placing the handle 4 on the wall 1.

La station d'encollage 2 dépose de la colle sur la paroi 1 dans les zones destinées à recevoir les jambes 41 des poignées 4 et l'éventuelle feuille de renfort 5.The gluing station 2 deposits glue on the wall 1 in the areas intended to receive the legs 41 of the handles 4 and the possible reinforcing sheet 5.

Lors du fonctionnement, une lanière est déposée par le rouleau de distribution 31 sur le tambour de pose 30 et maintenue sur celui-ci par les moyens d'accrochage qui pincent la traverse 40, pendant la formation de la poignée 4. Les parties de la lanière de part et d'autre de la traverse 40 sont pliées selon un pli à 45° de manière à former les jambes 41 à 90° par rapport à la traverse 40. Dans le cas où le dispositif de dépose 33 est prévu et opérationnel, de la colle est déposée sur les jambes 41 par le dispositif 32 et une feuille de renfort 5 est déposée sur les jambes 41 de la poignée 4. Lorsque la traverse 40 arrive au niveau du tambour de retournement 37, celle-ci est saisie par la pince de traverse 370 de celui-ci, comme le montre la figure 4, et lâchée par les moyens d'accrochage. Le tambour de retournement 37, en rotation, entraîne avec lui la traverse 40, comme le montre la figure 5. La lame 371 arrive alors au niveau de l'extrémité des jambes 41 et pousse celles-ci entre des mors de la pince de jambe 302. Les mors serrent l'extrémité des jambes 41, tandis que la lame 371 se dégage. La traverse 40 est alors relâchée par la pince de traverse 370 du tambour de retournement 37. Les moyens de guidage 38 font obstacle à la traverse 40 et l'oblige à venir en arrière de la pince de jambe 302 qui retient les jambes 41, comme le montre les figures 6 et 7. L'éventuelle feuille de renfort 5 est ainsi placée entre la périphérie du tambour de pose 30 et les jambes 41. Par la suite, la poignée 4 est complètement retournée, comme le montre la figure 7, puis est déposée sur la paroi 1 qui a reçu localement de la colle.During operation, a strap is deposited by the distribution roller 31 on the laying drum 30 and held thereon by the hooking means which clamp the cross member 40, during the formation of the handle 4. The parts of the strap on either side of the cross member 40 are folded in a 45 ° fold so as to form the legs 41 at 90 ° relative to the cross member 40. In the case where the removal device 33 is planned and operational, glue is deposited on the legs 41 by the device 32 and a reinforcing sheet 5 is deposited on the legs 41 of the handle 4. When the cross member 40 reaches the level of the turning drum 37, the latter is gripped by the traverse clamp 370 thereof, as shown in figure 4 , and released by the hooking means. The turning drum 37, in rotation, drives with it the crossmember 40, as shown in figure 5 . The blade 371 then arrives at the level of the end of the legs 41 and pushes the latter between the jaws of the leg clamp 302. The jaws grip the end of the legs 41, while the blade 371 is released. The cross member 40 is then released by the cross member clamp 370 of the turning drum 37. The guide means 38 obstruct the cross member 40 and force it to come behind the leg clamp 302 which retains the legs 41, as show it figures 6 and 7 . The possible backing sheet 5 is thus placed between the periphery of the laying drum 30 and the legs 41. Subsequently, the handle 4 is completely turned over, as shown in the figure. figure 7 , then is deposited on the wall 1 which has locally received glue.

La figure 8 montre exclusivement la station d'encollage 2 et la station de pose des poignées 3, selon un quatrième mode de réalisation utilisant une machine selon l'invention. Ce mode de réalisation se distingue des trois précédents en ce que la station de pose ne comporte pas de tambour de retournement 37, mais un dispositif d'application de colle 32 suivi d'un dispositif de pliage. En pratique, le tambour de retournement 37 peut être utilisé en neutralisant la pince 370, et en faisant fonctionner la lame 371 avec un décalage avec une autre pince 301. Ainsi, la même machine peut être utilisée pour mettre en œuvre le procédé décrit précédemment ou celui qui va être décrit ci-après.The figure 8 exclusively shows the gluing station 2 and the handling station 3, according to a fourth embodiment using a machine according to the invention. This embodiment differs from the previous three in that the laying station does not include a turning drum 37, but a glue application device 32 followed by a folding device. In practice, the turning drum 37 can be used by neutralizing the gripper 370, and by operating the blade 371 with an offset with another gripper 301. Thus, the same machine can be used to implement the method described above or the one which will be described below.

Dans ce mode de réalisation, les jambes 41 sont divisées en deux parties le long d'une ligne de pliage 410, la partie côté traverse 40 étant nommée bretelle 411 tandis que la partie restante est appelée la base 412.In this embodiment, the legs 41 are divided into two parts along a fold line 410, the cross-side part 40 being called the sling 411 while the remaining part is called the base 412.

Les figures 9 à 12 montrent le tambour 30 de manière schématique. Le tambour de pose 30 comporte des pinces 301 permettant de saisir chacune une jambe 41 de la poignée 4 le long des futures lignes de pliage 410 entre la base 412 et la bretelle 411. Au niveau du dispositif d'application de colle 32, de la colle est déposée sur les bases 412. La station 3 comporte en outre une lame de pliage 34 montée rotative et une barre de pliage 35 montée pivotante selon un axe légèrement excentré par rapport à l'axe du tambour 30. La fonction de la lame de pliage 34 peut être réalisée par la lame de pliage 371 du rouleau de retournement 37. La barre de pliage 35 est montée mobile entre une position de recul telle que montrée sur les figures 8 et 10 et une position de pliage représentée sur la figure 12 et en trait mixtes sur la figure 8. La lame de pliage 34 est configurée pour former le pli, ce qui a pour conséquence également de relever les bases 412 après leur passage au droit de la barre de pliage 35 en position de recul, afin que les bases 412 soient entraînées par la barre de pliage 35 dans sa trajectoire vers la position de pliage. La trajectoire de la barre de pliage 35 entre ces deux positions est telle que la barre de pliage 35 se rapproche de la surface du tambour 30 lorsqu'elle passe de la position de recul à la position de pliage. Le tambour de retournement 37 peut remplir le rôle du dispositif 34 en utilisant la lame de pliage 371 et en neutralisant la pince de traverse 370. La barre de pliage 35 peut aussi être amovible, ce qui permet de convertir la même machine en machine selon l'un des trois premiers modes de réalisation en machine selon le quatrième mode de réalisation. Dans ce cas, la pince 302 est par exemple amovible et est remplacée par la pince 301 pour adapter sa position et sa fonctionnalité.The figures 9 to 12 show the drum 30 schematically. The laying drum 30 comprises clamps 301 making it possible to each grip a leg 41 of the handle 4 along the future fold lines 410 between the base 412 and the strap 411. At the level of the glue application device 32, the glue is deposited on the bases 412. The station 3 further comprises a folding blade 34 mounted to rotate and a folding bar 35 mounted to pivot about an axis slightly eccentric with respect to the axis of the drum 30. The function of the blade Folding 34 can be achieved by the folding blade 371 of the turning roller 37. The folding bar 35 is movably mounted between a retracted position as shown in the figures. figures 8 and 10 and a folding position shown in the figure 12 and in mixed lines on the figure 8 . The folding blade 34 is configured to form the fold, which also results in raising the bases 412 after their passage to the right of the folding bar 35 in the retracted position, so that the bases 412 are driven by the bar. folding 35 in its path to the folding position. The path of the fold bar 35 between these two positions is such that the fold bar 35 approaches the surface of the drum 30 as it moves from the retracted position to the fold position. The turning drum 37 can fulfill the role of the device 34 by using the folding blade 371 and overriding the cross clamp 370. The folding bar 35 can also be removable, which allows the same machine to be converted into a machine according to the specification. one of the first three machine embodiments according to the fourth embodiment. In this case, the clamp 302 is for example removable and is replaced by the clamp 301 to adapt its position and its functionality.

Selon une première variante du quatrième mode de réalisation, la machine comporte en outre un dispositif de pose 33 de feuilles de renfort 5 pour déposer une feuille de renfort 5 sur chaque poignée 4, en couvrant les bretelles 411, comme le montre la figure 9, entre le rouleau de distribution 31 des poignées 4 et la zone de débattement de la barre de pliage 35.According to a first variant of the fourth embodiment, the machine further comprises a device 33 for placing reinforcing sheets 5 in order to deposit a reinforcing sheet 5 on each handle 4, while covering the straps 411, as shown in FIG. figure 9 , between the roll of distribution 31 of the handles 4 and the travel zone of the folding bar 35.

Lors du fonctionnement, le boyau 1 passe entre les deux tambours 30 de pose des poignées 4 et défile dans le sens de la flèche F1, les tambours 30 étant en rotation de manière synchrone au boyau 1. Chaque rouleau de distribution 31 dépose une lanière pour former une poignée 4 sur le tambour 30 qui saisit alors la poignée 4 par les jambes 41 grâce aux pinces 301. La traverse 40 est déposée à l'avant par rapport au sens de rotation du tambour 30. Lors de la rotation du tambour 30, le dispositif d'application de colle 32 dépose de la colle sur les bases 412, le dispositif de dépose 33 dépose la feuille de renfort 5 sur les bretelles 411 de la poignée 4, comme le montre la figure 9. Après que l'extrémité des jambes 41 a dépassé la barre de pliage 35, la lame de pliage 34 soulève les bases 412, tandis que la barre de pliage 35 accélère pour rattraper la poignée 4 en entraînant les bases 412 avec elle, de manière à les rabattre sur les bretelles 411 en emprisonnant la feuille de renfort 5, comme montré sur la figure 11. La barre de pliage 35 arrête son mouvement arrivée à la position de pliage, juste avant l'entrefer 36 entre les deux tambours 30. A cette position, les bases 412 sont placées contre les bretelles 411, comme montré sur la figure 12. Les bases 412 et la feuille de renfort 5 viennent en contact avec la paroi 1 sur lequel le collage s'effectue par pressage, en étant en regard d'une zone encollée 10 déposée sur le boyau préalablement par la station d'encollage 2. Les pinces 301 lâchent les jambes 41 de telle sorte que la poignée 4 est transférée sur le boyau 1. Une zone encollée sur la paroi vient en contact avec la traverse 40 pour ainsi la maintenir contre la paroi, ce qui forme des moyens de maintien 42.During operation, the hose 1 passes between the two drums 30 for placing the handles 4 and runs in the direction of the arrow F1, the drums 30 being in rotation synchronously with the hose 1. Each distribution roller 31 deposits a strap for form a handle 4 on the drum 30 which then grasps the handle 4 by the legs 41 using the clamps 301. The cross member 40 is deposited at the front relative to the direction of rotation of the drum 30. When the drum 30 rotates, the adhesive application device 32 deposits the adhesive on the bases 412, the depositing device 33 deposits the backing sheet 5 on the straps 411 of the handle 4, as shown in figure figure 9 . After the end of the legs 41 has passed the folding bar 35, the folding blade 34 lifts the bases 412, while the folding bar 35 accelerates to catch up with the handle 4 by dragging the bases 412 with it, so as to fold them over the straps 411, trapping the reinforcement sheet 5, as shown on figure 11 . The folding bar 35 stops its movement when it arrives at the folding position, just before the air gap 36 between the two drums 30. In this position, the bases 412 are placed against the straps 411, as shown in the figure. figure 12 . The bases 412 and the reinforcing sheet 5 come into contact with the wall 1 on which the bonding is carried out by pressing, being opposite a glued zone 10 deposited on the hose beforehand by the gluing station 2. The clamps 301 release the legs 41 so that the handle 4 is transferred to the hose 1. A zone glued to the wall comes into contact with the cross member 40 to thus hold it against the wall, which forms holding means 42.

Dans une deuxième variante du quatrième mode de réalisation, représenté sur les figures 15 à 18, la feuille de renfort 5' est déposée dans une position telle qu'elle recouvre les jambes 41 de part et d'autre de la ligne de pliage 410, et donc à la fois sur les bases 412 et sur les bretelles 411, de telle sorte qu'elle est pliée avec les bases 412 lors de l'opération de pliage. Le reste du procédé est identique au quatrième mode de réalisation.In a second variant of the fourth embodiment, shown in the figures 15 to 18 , the reinforcing sheet 5 'is deposited in a position such that it covers the legs 41 on either side of the fold line 410, and therefore both on the bases 412 and on the straps 411, so so that it is folded with the bases 412 during the operation folding. The rest of the process is identical to the fourth embodiment.

Le sac obtenu permet d'avoir une feuille de renfort 5' collée sur la paroi du sac sur la hauteur des bases 412 et un rabat 50 qui s'étend au-delà de la ligne de pliage 410, comme montré sur la figure 18.The bag obtained makes it possible to have a reinforcing sheet 5 'glued to the wall of the bag over the height of the bases 412 and a flap 50 which extends beyond the fold line 410, as shown on the figure. figure 18 .

Dans une variante du premier mode de réalisation, non représentée, le pliage des jambes 41 est réalisé sur le rouleau de distribution 31 et non sur le tambour 30. Cette disposition permet que la poignée 4 présente la face opposée une fois déposée sur la paroi 1, en comparaison au mode représenté sur la figure 3. Cette variante est aussi applicable à tous les autres modes de réalisation.In a variant of the first embodiment, not shown, the folding of the legs 41 is carried out on the distribution roller 31 and not on the drum 30. This arrangement allows the handle 4 to have the opposite face once deposited on the wall 1. , in comparison to the mode shown in figure 3 . This variant is also applicable to all the other embodiments.

L'invention n'est pas limitée aux modes de réalisation qui viennent d'être décrits à titre d'exemple. La feuille de renfort 5 peut être séparée pour s'appliquer en deux morceaux, un pour chaque base. Elle peut par ailleurs s'étendre sur toute la longueur des bases, voire au-delà ou au contraire en deçà des extrémités opposées à la ligne de pliage. On pourrait déposer les poignées côte-à-côte sur la bande avant la formation du boyau afin que les poignées se retrouvent ensuite à l'intérieur du sac.The invention is not limited to the embodiments which have just been described by way of example. The backing sheet 5 can be separated to apply in two pieces, one for each base. It can also extend over the entire length of the bases, or even beyond or on the contrary below the ends opposite to the fold line. One could lay the handles side by side on the band before forming the hose so that the handles are then found inside the bag.

La machine peut être adaptée pour recevoir soit le tambour de retournement, soit la station de pliage. La même machine peut ainsi être modifiée facilement pour modifier le type de sacs produits. Mais la machine peut comporter également en périphérie du tambour de pose à la fois le tambour de retournement et le dispositif de pliage, de manière décalée selon la périphérie. Il va de soi que dans cette configuration, ces deux équipements ne sont pas en service simultanément.The machine can be adapted to receive either the turning drum or the folding station. The same machine can thus be easily modified to modify the type of bags produced. However, the machine may also include, on the periphery of the laying drum, both the turning drum and the folding device, in a manner offset along the periphery. It goes without saying that in this configuration, these two devices are not in service simultaneously.

Une station d'inversion peut être intercalée entre la station de pose des poignées et la station de formation du boyau. La station d'inversion permet d'inverser le dessus et le dessous de la bande 1a. Ainsi, les poignées posées se retrouvent à l'intérieur ou à l'extérieur du sac.An inversion station can be inserted between the handle placement station and the hose forming station. The inversion station allows the top and bottom of the band 1a to be reversed. Thus, the handles placed are found inside or outside the bag.

La poignée pourrait être transportée par des moyens de transport entre le tambour de pose 30 et la paroi 1.The handle could be transported by means of transport between the laying drum 30 and the wall 1.

Claims (13)

  1. A method of manufacturing a bag in which:
    - a wall (1, 1a) of the bag is made to pass along a rotatably mounted placement drum (30) for placing handles (4);
    - a handle (4) is hung on the placement drum (30), legs (41) of the handle (4) extending along a perimeter of the placement drum (30), backward in the direction of rotation of the placement drum (30), the legs (41) being connected by a cross-piece (40);
    - the handle (4) is placed on the wall;
    characterized in that before the handle (4) is placed on the wall, said handle is completely turned by a turning drum (37) so that the legs (41) are placed forward on the placement drum (30).
  2. A method of manufacturing a bag according to claim 1, wherein, to carry out the turning, the cross-piece (40) of the handle (4) is grasped by the turning drum (37) tangentially to the periphery of the placement drum, a blade (371) carried by the turning drum (37) inserts the end of the legs (41) in a gripper (302) of the placement drum (30) and the cross-piece (40) is released by bringing the handle (4) against the periphery of the placement drum (30).
  3. A method of manufacturing a bag according to one of claims 1 or 2, wherein at least one backing sheet (5) is placed by covering at least partially at least one leg (41) before the turning of the handle (4).
  4. A method according to one of the preceding claims, wherein the rotational speed of the placement drum (30) is adjusted during the rotation of one revolution to place the handle (4) at the speed of the wall (1) and at the interval separating two successive bags.
  5. A machine for manufacturing bags with handles having conveyance means for passing a wall (1, 1a) of the bag along a rotatably mounted placement drum (30) for placing handles (4), attachment means for attaching a handle (4) on the placement drum (30), legs (41) of the handle (4) extending along a perimeter of the placement drum (30) backward in the direction of the rotation of the placement drum (30), the legs (41) being connected by a cross-piece (40), the attachment means being configured to place the handle (4) on the wall, characterized in that it comprises a turning drum (37) to turn the handle (4) before placement of the handle (4) on the wall and the legs are placed forward on the placement drum (30) and in that the machine is intended to implement the method according to one of claims 1 to 4.
  6. A machine according to claim 5, wherein, to carry out the turning, the turning drum (37) is rotating and tangential to the periphery of the placement drum (30) and comprises a cross-piece gripper (370) to grasp the handle (4) by the cross-piece (40) during its passage between the placement drum (30) and the turning drum (37), and a blade (371) capable of inserting the end of the legs (41) into a gripper (302) of the placement drum, the cross-piece gripper (370) being configured to release the cross-piece (40) after the grasping of the legs (41) by the leg gripper, the machine further comprising guiding means (38) to return the handle (4) against the periphery of the placement drum, after the turning drum (37) and before the laying of the handle (4) on the wall.
  7. A machine according to claim 6, wherein the cross-piece gripper (370) can be neutralized and the gripper (302) is removably mounted on the placement drum (30) .
  8. A machine according to claim 7, wherein it comprises a folding bar (35) pivotally mounted slightly off-axis with respect to the drum axis (30), and movable between a retracted position and a folding position such that when said folding bar (35) moves from the retracted position to the folding position, it approaches the surface of the drum (30), wherein the folding bar (35) is removably mounted on the placement drum (30), and wherein the placement drum (30) includes grippers (301) for gripping each leg (41) of the handle (4) along future bending lines (410) on said leg (41).
  9. A machine according to one of claims 5 to 8, characterized in that it comprises a station for placing the backing sheet (5) upstream of the turning drum (37) for placing at least one backing sheet (5) which at least partially covers at least one leg.
  10. A machine according to one of claims 5 to 9, characterized in that it comprises control means for controlling the rotational speed of the placement drum (30) upon rotation of one revolution and for placing the handle (4) at the speed of the wall (1) and at the interval separating two successive bags.
  11. A machine according to one of claims 5 to 10, characterized in that it comprises a station for forming a hollow body (9) placed downstream of the placement drum.
  12. A machine according to one of claims 5 to 10, characterized in that it comprises a station for forming a hollow body (9) placed upstream of the placement drum (30) and a bottom forming station (7) downstream of the placement drum (30).
  13. A machine according to one of claims 5 to 10, characterized in that it comprises a station for forming a hollow body (9) placed upstream of a bottom forming station (7), which is upstream of the placement drum (30) .
EP16794696.1A 2015-10-16 2016-10-11 Method and machine for manufacturing a bag comprising handles Active EP3362276B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1559858A FR3042436B1 (en) 2015-10-16 2015-10-16 METHOD AND MACHINE FOR MANUFACTURING A BAG COMPRISING HANDLES
PCT/FR2016/052623 WO2017064409A1 (en) 2015-10-16 2016-10-11 Method and machine for manufacturing a bag comprising handles

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EP3362276A1 EP3362276A1 (en) 2018-08-22
EP3362276B1 true EP3362276B1 (en) 2020-09-23

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EP (1) EP3362276B1 (en)
FR (1) FR3042436B1 (en)
WO (1) WO2017064409A1 (en)

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CN109353075B (en) * 2018-11-22 2023-07-21 温州临界科技有限公司 Perforating device for handbag rope threading machine

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Publication number Publication date
FR3042436A1 (en) 2017-04-21
US20180319115A1 (en) 2018-11-08
US10737455B2 (en) 2020-08-11
EP3362276A1 (en) 2018-08-22
FR3042436B1 (en) 2017-11-17
WO2017064409A1 (en) 2017-04-20

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