EP1350748B1 - Device for overturning piles of sheet material - Google Patents

Device for overturning piles of sheet material Download PDF

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Publication number
EP1350748B1
EP1350748B1 EP03003946A EP03003946A EP1350748B1 EP 1350748 B1 EP1350748 B1 EP 1350748B1 EP 03003946 A EP03003946 A EP 03003946A EP 03003946 A EP03003946 A EP 03003946A EP 1350748 B1 EP1350748 B1 EP 1350748B1
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EP
European Patent Office
Prior art keywords
piles
stripping
fold
belt conveyor
move
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP03003946A
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German (de)
French (fr)
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EP1350748A3 (en
EP1350748A2 (en
Inventor
Nicolas Brizzi
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.)
Bobst Mex SA
Original Assignee
Bobst SA
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Filing date
Publication date
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Publication of EP1350748A2 publication Critical patent/EP1350748A2/en
Publication of EP1350748A3 publication Critical patent/EP1350748A3/en
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Publication of EP1350748B1 publication Critical patent/EP1350748B1/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
    • B31B50/25—Surface scoring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H15/00—Overturning articles
    • B65H15/02—Overturning piles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H15/00—Overturning articles
    • B65H15/016—Overturning articles employing rotary or reciprocating elements supporting transport means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/30—Orientation, displacement, position of the handled material
    • B65H2301/33—Modifying, selecting, changing orientation
    • B65H2301/332—Turning, overturning
    • B65H2301/3321—Turning, overturning kinetic therefor
    • B65H2301/33214—Turning, overturning kinetic therefor about an axis perpendicular to the direction of displacement and parallel to the surface of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/30—Orientation, displacement, position of the handled material
    • B65H2301/33—Modifying, selecting, changing orientation
    • B65H2301/332—Turning, overturning
    • B65H2301/3322—Turning, overturning according to a determined angle
    • B65H2301/33224—180°

Definitions

  • the present invention relates to a device for returning stacks of sheet material, comprising a frame having an inlet and an outlet, aligned along a longitudinal path of travel of said stacks, a turning clamp pivotally mounted about a horizontal axis, transverse to said longitudinal path, comprising two conveyors arranged facing each other, one of which serves to receive said stacks entering the device and the other of which serves to evacuate said stacks after rotation of said turnaround support around said axis and means for exerting pressure on said stacks through said carriers during said rotation.
  • Such a device is disclosed for example in the document JP-A-58-095,053 .
  • Cardboard blanks with an impression on one side are cut with the printed side facing upwards.
  • the printed side In the rest of the process leading to a folder-gluer for the shaping of the cuts, the printed side must be turned down, which requires the reversal stacks of cuts.
  • Such work is extremely painful, all the more painful as the surface of the cutouts is large, the hardness due to the reversal of such batteries having nothing to do with the simple fact of wearing these same batteries. Thus, a worker may have to return several tons of cardboard per day.
  • the object of the present invention is to provide a reliable solution to the problem of turning over stacks of sheet material while creating a buffer zone allowing freedom of loading for the operator.
  • the present invention relates to a device for returning stacks of sheet material according to claim 1.
  • This device allows a fully automatic supply of the folder-gluer.
  • the only manual intervention consists in placing stacks of cardboard sheets on a conveyor belt that is upstream of this device.
  • This allows a continuous supply of a premargor disposed between the turning device and the folder-gluer.
  • the operating rates of the folder-gluer fed from this device for turning the batteries can be substantially increased.
  • the figure 1 is a side elevational view of this device in the evacuation position
  • FIGS. 2 to 6 are very simplified diagrams of the device illustrated by the figure 1 , intended to show the different stages of a battery reversal cycle.
  • the battery reversing device illustrated by the figure 1 comprises a frame 1 generally parallelepiped shaped, delimited by two parallel side walls connected by two walls or spacers, respectively lower, respectively, the whole being mounted on four wheels 2 in engagement with guide rails 3 and associated with blocking 4.
  • the front end of an endless conveyor belt 5 of a feed unit enters this parallelepiped-shaped frame 1 through an opening in a transverse wall thereof relative to the direction of scrolling piles of cardboard sheets 6 which is parallel to the view of the figure 1 .
  • This parallelepiped frame 1 passes through its opposite transverse wall and communicates with a pre-plug 7 which has an inclined surface formed by a conveyor belt 8 located below the level of the output of the battery reversing device.
  • a reversing clamp 12 is disposed between two parallel support plates 15, pivotally mounted inside this parallelepiped-shaped frame 1, each on one of the two parallel side walls of this frame 1, about a horizontal axis 13. , transverse to the aforementioned travel trajectory of the stacks 6, so as to describe a circular trajectory 9 around the pivot axis 13.
  • These two parallel support plates 15 are connected to one another by transverse struts in FIG. so that they are secured to one another about the pivot axis 13.
  • the actual clamp is formed by a series of rollers 10, mounted transversely between the two parallel support plates 15 and by a belt conveyor 11.
  • the carpet conveyor 11 is freely rotated around a part of the aforementioned spacers connecting the two Parallel support plates 15.
  • the rollers of the series of rollers 10 are pivotally mounted on a frame 16 which is slidably mounted by means of four guide slides 14 integral respectively in pairs with parallel support plates 15. These slides of FIG. guide 14 are vertical when the collet is in the position of receiving or evacuating batteries.
  • the frame 16 is secured to a transmission arm 17 articulated to a rocker 18 connected to the rod of a jack 19 intended to move the frame 16 along the guide slides 14.
  • This series of rollers 10 is intended to receive the stacks of sheets 6 when they enter the overturning device, and then press them against the conveyor belt 11, secured to the parallel support plates 15, to hold them firmly during their turn.
  • the conveyor belt 11 is secured to the collet 12 and its ends pivot in the two parallel side plates 15 of the collet 12.
  • This conveyor belt 11 forms a segment whose two ends are adjacent to a circle 9 formed by the circular trajectory of the turning clamp 12 rotating about the axis 13.
  • This conveyor belt 11 is driven by a motor 21.
  • the conveyor belt 11 drives a push carriage 25 slidably mounted on two lateral guide rails 26, secured to the respective parallel support plates 15, a pusher carriage 25 to which is attached a telescopic stop 27 which extends between the conveyor belt 11 and the series of rollers 10.
  • a return spring 28 is used to adapting the length of the telescopic stop 27 to the distance between the conveyor belt 11 and the series of rollers 10.
  • One of the support plates 15 is integral with a ring gear 22 in engagement with a chain 23 associated with a drive motor 24 integral with the frame 1.
  • the turning device further comprises a retaining and sliding support member 28, used for the evacuation of the returned batteries 6, to the pre-cursor 7.
  • This retaining and support member 28 comprises two parallel arms of which only one 29 is visible.
  • Each of these arms 29 is slidably mounted in a guide rail 31, each fixed to one of the side walls of the frame 1.
  • the arms 29 are connected, at their front part, by means of a spacer 20.
  • Each of the arms 29 is provided with a rack engaged with a pinion gear 30 integral with a transverse axis driven by a motor (not shown).
  • Battery holders 32 are mounted on the spacer 20 connecting one of the ends of the arms 29.
  • Detection means such as a photoelectric detector 34 ( figure 2 ) are arranged at the entrance of the turning device to allow the entry of a stack 6 to return when the turning device is ready to receive it.
  • the batteries 6 to be returned are aligned on the conveyor belt 5 of the feed unit by means of a longitudinal guide wall 33 whose lateral position can be adjusted according to the width of the cardboard blanks. forming the stacks 6, so as to accurately determine the lateral position of these stacks on the conveyor belt 5.
  • This guide wall 33 also serves to define the limits relating to the height of the stacks, which are acceptable by the reversing device.
  • the batteries 6 aligned on the conveyor belt 5 are advanced to a position located at the entrance of the reversing device, position determined by the photoelectric detector, where they wait for the end of the reversal cycle of the previous battery 6, a cycle that we will describe below.
  • a stack 6 is introduced into the collet 12 by the conveyor belt 5. When it leaves this conveyor belt 5, it rolls, by gravity, on the rollers 10, until it comes against the telescopic stop 27
  • the plane formed by the series of rollers 10 has a very small inclination towards the exit of the turning device, allowing the stack 6 to come to bear against the telescopic stop 27 by gravity.
  • the position of the telescopic stop 27 is precisely adjusted according to the size of the stack 6 in its running direction, thanks to the drive motor 21 of the conveyor belt 11 to which the push carriage 25 is fixed.
  • the jack 19 moves the series of rollers 10 towards the conveyor belt 11, thereby pinching the stack 6 between these two members 10, 11, as illustrated by the figure 3 .
  • the turning tong 12 is then driven by the motor 24 to rotate it 180 ° in the opposite direction to that of the hands of the watch, bringing the stack 6 to the position illustrated by the figure 4 .
  • the jack 19 then moves the series of rollers 10 from the conveyor belt 11, releasing both the stack 6 and the telescopic stop 27, so that the stack 6 turned 180 ° can be removed from the turning device by the conveyor. 11, in the direction of the conveyor belt 8 of the pretender 7.
  • the pusher carriage 25 integral with the conveyor belt 11 can perform this evacuation operation of the stack 6 if the pre-spreader 7 is able to receive it.
  • detection means such as photoelectric means 35 ( figure 4 ) are arranged at the exit of the turning device for detecting the upper level of the previously discharged pile 6, the cardboard blanks of which are distributed continuously to a folder-gluer (not shown) which is located downstream of the pre-spreader 7.
  • the stack support arm 32 which had accompanied the previous stack and could not return to its starting position before the level of the stack 6 allows it to pass, can then be brought back by the pinions 30 in engagement with the racks 29, as illustrated by the figure 4 .
  • the conveyor belt 11 can then move the stack 6 until it reaches the height of the arms of the battery holder 32 which, at this time, will move in synchronism with the conveyor belt 11, until the height of the gauges 36 of the pretender 7.
  • the battery support arms 32 will continue their stroke until the support part which located under the pile 6 is released from it, so that this pile falls on the residual cuts remaining on the premargeur 7.
  • the battery support arms 32 will wait for the level of the battery 6 to descend. During this time, however, the pusher carriage 25 returns to its initial position and the collet 12 rotates 180 ° in a clockwise direction so as to return to its initial position to receive a new battery 6.
  • the printed face of the cardboard blanks forming the stacks 6 is not in contact with rollers, but with the conveyor belt 11, so that the first blank of the stack is no longer marked by rollers.
  • the battery 6 is no longer pushed but positively transported.
  • the stack goes from a straight parallelepiped shape to a parallelepiped whose straight section parallel to the longitudinal scroll axis of the batteries 6 has the shape of a parallelogram .
  • the angles of the cross-section of the stack change, which causes a slippage between the adjacent cuts, favoring the separation of these cuts one of the others.
  • the position of the carriage 25 and its stop 28 can be precisely controlled by the motor 21 as a function of the size of the cardboard blanks forming the stack 6.
  • the box blanks coming out of the machine that previously worked them are in a position that does not require overturning. It is therefore possible, by playing on the programming of overturning and transporting motors, to pass the stacks of cuts through the device without reversing them, while retaining the advantages of the positive transport provided by the present device.

Landscapes

  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Registering Or Overturning Sheets (AREA)
  • Pile Receivers (AREA)
  • Attitude Control For Articles On Conveyors (AREA)
  • Making Paper Articles (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Forming Counted Batches (AREA)
  • Discharge By Other Means (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Holding Or Fastening Of Disk On Rotational Shaft (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Specific Conveyance Elements (AREA)

Abstract

The machine, consisting of a frame (1) with an inlet and outlet aligned with the trajectory of the stacks (6) of sheet material as they are turned, and a turning clamp (2) that pivots about a horizontal transverse axis (13), has two conveyors : a roller conveyor (10) to receive the incoming stacks, and a belt conveyor (11) to discharge them after turning. It also has a pressure mechanism (19) to hold the stacks between the two conveyors during the turning operation, and a pusher carriage (25) between the conveyors, connected to a drive (21).

Description

La présente invention se rapporte à un dispositif pour retourner des piles de matériau en feuilles, comportant un bâti présentant une entrée et une sortie, alignées selon une trajectoire longitudinale de défilement desdites piles, une pince de retournement montée pivotante autour d'un axe horizontal, transversal à ladite trajectoire longitudinale, comportant deux transporteurs disposée en face l'un de l'autre, dont l'un sert à recevoir lesdites piles entrant dans le dispositif et dont l'autre sert à évacuer lesdites piles après rotation dudit support de retournement autour dudit axe et des moyens pour exercer une pression sur lesdites piles par l'intermédiaire desdits transporteurs pendant ladite rotation.The present invention relates to a device for returning stacks of sheet material, comprising a frame having an inlet and an outlet, aligned along a longitudinal path of travel of said stacks, a turning clamp pivotally mounted about a horizontal axis, transverse to said longitudinal path, comprising two conveyors arranged facing each other, one of which serves to receive said stacks entering the device and the other of which serves to evacuate said stacks after rotation of said turnaround support around said axis and means for exerting pressure on said stacks through said carriers during said rotation.

Un tel dispositif est divulgué par exemple dans le document JP-A-58-095 053 .Such a device is disclosed for example in the document JP-A-58-095,053 .

Les découpes de carton portant une impression sur une face sont découpées avec la face imprimée tournée vers le haut. Dans la suite du processus aboutissant à une plieuse-colleuse pour la mise en forme des découpes, la face imprimée doit être tournée vers le bas, ce qui nécessite le retournement des piles de découpes. Un tel travail est extrêmement pénible, d'autant plus pénible que la surface des découpes est grande, la pénibilité due au retournement de telles piles n'ayant rien à voir avec le simple fait de porter ces mêmes piles. Ainsi, un ouvrier peut être amené à retourner plusieurs tonnes de carton par jour.Cardboard blanks with an impression on one side are cut with the printed side facing upwards. In the rest of the process leading to a folder-gluer for the shaping of the cuts, the printed side must be turned down, which requires the reversal stacks of cuts. Such work is extremely painful, all the more painful as the surface of the cutouts is large, the hardness due to the reversal of such batteries having nothing to do with the simple fact of wearing these same batteries. Thus, a worker may have to return several tons of cardboard per day.

On a déjà vu apparaître sur le marché un dispositif pour le retournement des piles du type susmentionné, qui présentait plusieurs inconvénients, liés aussi bien à la précision, à la fiabilité, au contrôle des opérations, qu'au marquage des premières découpes de chaque pile par les deux séries de rouleaux entre lesquels la pile est fortement pincée pour la maintenir pendant le retournement et aux formats de découpes qui peuvent être traités par le dispositif connu qui, compte tenu de ces inconvénients, n'a pas connu de succès commercial.We have already seen appear on the market a device for the reversal of batteries of the aforementioned type, which had several disadvantages, related to the accuracy, reliability, control of operations, as marking the first cutouts of each stack by the two sets of rollers between which the stack is strongly pinched to maintain it during the reversal and cut formats that can be processed by the known device which, given these disadvantages, has not been commercially successful.

Etant donné la vitesse de production atteinte par les plieuses-colleuses modernes, il devient impératif d'arriver à une suppression des opérations manuelles, notamment celle relative au retournement des piles, permettant de réduire la pénibilité du travail et la main-d'oeuvre nécessaire, tout en augmentant les cadences de production.Given the speed of production achieved by modern folder-gluers, it becomes imperative to achieve a suppression of manual operations, especially that relating to the reversal of batteries, to reduce the hardness of work and the necessary labor , while increasing production rates.

Le but de la présente invention est d'apporter une solution fiable au problème du retournement des piles de matériau en feuilles tout en créant une zone tampon autorisant une liberté de chargement pour l'opérateur.The object of the present invention is to provide a reliable solution to the problem of turning over stacks of sheet material while creating a buffer zone allowing freedom of loading for the operator.

A cet effet, la présente invention a pour objet un dispositif pour retourner des piles de matériau en feuilles selon la revendication 1.To this end, the present invention relates to a device for returning stacks of sheet material according to claim 1.

Ce dispositif permet un approvisionnement entièrement automatique de la plieuse-colleuse. La seule intervention manuelle consiste dans la mise en place de piles de feuilles de carton sur un transporteur à tapis qui se trouve en amont de ce dispositif. Celui-ci permet une alimentation continue d'un prémargeur disposé entre le dispositif de retournement et la plieuse-colleuse. De ce fait, les cadences d'exploitation de la plieuse-colleuse alimentée à partir de ce dispositif pour retourner les piles peuvent être sensiblement accrues.This device allows a fully automatic supply of the folder-gluer. The only manual intervention consists in placing stacks of cardboard sheets on a conveyor belt that is upstream of this device. This allows a continuous supply of a premargor disposed between the turning device and the folder-gluer. As a result, the operating rates of the folder-gluer fed from this device for turning the batteries can be substantially increased.

D'autres particularités de cette invention apparaîtront au cours de la description qui va suivre et qui sera faite à l'aide des dessins annexés qui illustrent, schématiquement et à titre d'exemple, une forme d'exécution du dispositif pour retourner des piles de matériau en feuilles, objet de la présente invention.Other features of this invention will become apparent from the following description which will be made with the aid of the accompanying drawings which illustrate, schematically and by way of example, an embodiment of the device for returning piles of batteries. sheet material, object of the present invention.

La figure 1 est une vue en élévation latérale de ce dispositif en position d'évacuation;The figure 1 is a side elevational view of this device in the evacuation position;

les figures 2 à 6 sont des schémas très simplifiés du dispositif illustré par la figure 1, destinés à montrer les différentes étapes d'un cycle de retournement de piles.the Figures 2 to 6 are very simplified diagrams of the device illustrated by the figure 1 , intended to show the different stages of a battery reversal cycle.

Le dispositif de retournement de piles illustré par la figure 1 comporte un bâti 1 en forme générale de parallélépipède, délimité par deux parois latérales parallèles reliées par deux parois ou entretoises, inférieure, respectivement supérieure, le tout étant monté sur quatre roues 2 en prise avec des rails de guidage 3 et associées à des organes de blocage 4. L'extrémité avant d'une bande transporteuse sans fin 5 d'une unité d'alimentation pénètre dans ce bâti 1 en forme de parallélépipède, par une ouverture ménagée dans une paroi transversale de celui-ci par rapport à la direction de défilement des piles de feuilles de carton 6 qui est parallèle à la vue de la figure 1.The battery reversing device illustrated by the figure 1 comprises a frame 1 generally parallelepiped shaped, delimited by two parallel side walls connected by two walls or spacers, respectively lower, respectively, the whole being mounted on four wheels 2 in engagement with guide rails 3 and associated with blocking 4. The front end of an endless conveyor belt 5 of a feed unit enters this parallelepiped-shaped frame 1 through an opening in a transverse wall thereof relative to the direction of scrolling piles of cardboard sheets 6 which is parallel to the view of the figure 1 .

La sortie de ce bâti 1 en forme de parallélépipède traverse sa paroi transversale opposée et communique avec un prémargeur 7 qui présente une surface inclinée formée par une bande transporteuse 8 située au-dessous du niveau de la sortie du dispositif de retournement de piles.The output of this parallelepiped frame 1 passes through its opposite transverse wall and communicates with a pre-plug 7 which has an inclined surface formed by a conveyor belt 8 located below the level of the output of the battery reversing device.

Une pince de retournement 12 est disposée entre deux plaques de support parallèles 15, montées pivotantes à l'intérieur de ce bâti 1 en forme de parallélépipède, chacune sur une des deux parois latérales parallèles de ce bâti 1, autour d'un axe horizontal 13, transversal à la trajectoire de défilement des piles 6 susmentionnée, de manière à décrire une trajectoire circulaire 9 autour de l'axe de pivotement 13. Ces deux plaques de support parallèles 15 sont reliées l'une à l'autre par des entretoises transversales en sorte qu'elles sont solidaires l'une de l'autre autour de l'axe de pivotement 13.A reversing clamp 12 is disposed between two parallel support plates 15, pivotally mounted inside this parallelepiped-shaped frame 1, each on one of the two parallel side walls of this frame 1, about a horizontal axis 13. , transverse to the aforementioned travel trajectory of the stacks 6, so as to describe a circular trajectory 9 around the pivot axis 13. These two parallel support plates 15 are connected to one another by transverse struts in FIG. so that they are secured to one another about the pivot axis 13.

La pince proprement dite est formée par une série de rouleaux 10, montés transversalement entre les deux plaques de support parallèles 15 et par un transporteur à tapis 11. Le transporteur à tapis 11 est pivoté librement autour d'une partie des entretoises susmentionnées reliant les deux plaques de support parallèles 15. Les rouleaux de la série de rouleaux 10 sont montés pivotants sur un châssis 16 qui est monté coulissant par l'intermédiaire de quatre coulisseaux de guidage 14 solidaires respectivement deux à deux des plaques de support parallèles 15. Ces coulisseaux de guidage 14 sont verticaux lorsque la pince de retournement est en position de réception ou d'évacuation des piles.The actual clamp is formed by a series of rollers 10, mounted transversely between the two parallel support plates 15 and by a belt conveyor 11. The carpet conveyor 11 is freely rotated around a part of the aforementioned spacers connecting the two Parallel support plates 15. The rollers of the series of rollers 10 are pivotally mounted on a frame 16 which is slidably mounted by means of four guide slides 14 integral respectively in pairs with parallel support plates 15. These slides of FIG. guide 14 are vertical when the collet is in the position of receiving or evacuating batteries.

Le châssis 16 est solidaire d'un bras de transmission 17 articulé à une bascule 18 reliée à la tige d'un vérin 19 destiné à déplacer le châssis 16 le long des coulisseaux de guidage 14. Cette série de rouleaux 10 est destinée à réceptionner les piles de feuilles 6 lors de leur entrée dans le dispositif de retournement, puis à les presser contre le transporteur à tapis 11, solidaire des plaques de support parallèles 15, pour les tenir fermement pendant leur retournement.The frame 16 is secured to a transmission arm 17 articulated to a rocker 18 connected to the rod of a jack 19 intended to move the frame 16 along the guide slides 14. This series of rollers 10 is intended to receive the stacks of sheets 6 when they enter the overturning device, and then press them against the conveyor belt 11, secured to the parallel support plates 15, to hold them firmly during their turn.

Le transporteur à tapis 11 est solidaire de la pince de retournement 12 et ses extrémités pivotent dans les deux plaques latérales parallèles 15 de cette pince de retournement 12. Ce transporteur à tapis 11 forme un segment dont les deux extrémités sont adjacentes à un cercle 9 formé par la trajectoire circulaire de la pince de retournement 12 tournant autour de l'axe 13. Ce transporteur à tapis 11 est entraîné par un moteur 21. Le transporteur à tapis 11 entraîne un chariot pousseur 25 monté coulissant sur deux rails de guidage latéraux 26, solidaires des plaques de support parallèles respectives 15, chariot pousseur 25 auquel est fixée une butée télescopique 27 qui s'étend entre le transporteur à tapis 11 et la série de rouleaux 10. Un ressort de rappel 28 sert à adapter la longueur de la butée télescopique 27 à l'écartement entre le transporteur à tapis 11 et la série de rouleaux 10.The conveyor belt 11 is secured to the collet 12 and its ends pivot in the two parallel side plates 15 of the collet 12. This conveyor belt 11 forms a segment whose two ends are adjacent to a circle 9 formed by the circular trajectory of the turning clamp 12 rotating about the axis 13. This conveyor belt 11 is driven by a motor 21. The conveyor belt 11 drives a push carriage 25 slidably mounted on two lateral guide rails 26, secured to the respective parallel support plates 15, a pusher carriage 25 to which is attached a telescopic stop 27 which extends between the conveyor belt 11 and the series of rollers 10. A return spring 28 is used to adapting the length of the telescopic stop 27 to the distance between the conveyor belt 11 and the series of rollers 10.

Une des plaques de support 15 est solidaire d'une couronne dentée 22 en prise avec une chaîne 23 associée à un moteur d'entraînement 24 solidaire du bâti 1.One of the support plates 15 is integral with a ring gear 22 in engagement with a chain 23 associated with a drive motor 24 integral with the frame 1.

Le dispositif de retournement comporte encore un organe de retenue et de support coulissant 28, servant à l'évacuation des piles 6 retournées, vers le prémargeur 7. Cet organe de retenue et de support 28 comprend deux bras parallèles dont seul l'un 29 est visible. Chacun de ces bras 29 est monté coulissant dans un rail de guidage 31, chacun fixé à une des parois latérales du bâti 1. Les bras 29 sont reliés, à leur partie avant, au moyen d'une entretoise 20. Chacun des bras 29 est muni d'une crémaillère en prise avec un pignon 30 solidaire d'un axe transversal entraîné par un moteur (non représenté). Des supports de pile 32 sont montés sur l'entretoise 20 reliant l'une des extrémités des bras 29. Des moyens de détection, tels qu'un détecteur photoélectrique 34 (figure 2) sont disposés à l'entrée du dispositif de retournement pour ne permettre l'entrée d'une pile 6 à retourner que lorsque le dispositif de retournement est prêt à la recevoir. Au préalable, les piles 6 à retourner sont alignées sur la bande transporteuse 5 de l'unité d'alimentation à l'aide d'une paroi de guidage longitudinale 33 dont la position latérale peut être réglée en fonction de la largeur des découpes de carton formant les piles 6, de manière à déterminer avec précision la position latérale de ces piles sur la bande transporteuse 5. Cette paroi de guidage 33 sert également à définir les limites relatives à la hauteur des piles, qui sont acceptables par le dispositif de retournement.The turning device further comprises a retaining and sliding support member 28, used for the evacuation of the returned batteries 6, to the pre-cursor 7. This retaining and support member 28 comprises two parallel arms of which only one 29 is visible. Each of these arms 29 is slidably mounted in a guide rail 31, each fixed to one of the side walls of the frame 1. The arms 29 are connected, at their front part, by means of a spacer 20. Each of the arms 29 is provided with a rack engaged with a pinion gear 30 integral with a transverse axis driven by a motor (not shown). Battery holders 32 are mounted on the spacer 20 connecting one of the ends of the arms 29. Detection means, such as a photoelectric detector 34 ( figure 2 ) are arranged at the entrance of the turning device to allow the entry of a stack 6 to return when the turning device is ready to receive it. Beforehand, the batteries 6 to be returned are aligned on the conveyor belt 5 of the feed unit by means of a longitudinal guide wall 33 whose lateral position can be adjusted according to the width of the cardboard blanks. forming the stacks 6, so as to accurately determine the lateral position of these stacks on the conveyor belt 5. This guide wall 33 also serves to define the limits relating to the height of the stacks, which are acceptable by the reversing device.

Les piles 6 alignées sur la bande transporteuse 5 sont avancées jusqu'à une position située à l'entrée du dispositif de retournement, position déterminée par le détecteur photoélectrique, où elles attendent la fin du cycle de retournement de la pile 6 précédente, cycle que nous allons décrire ci-après. Une pile 6 est introduite dans la pince de retournement 12 par la bande transporteuse 5. Lorsqu'elle quitte cette bande transporteuse 5, elle roule, par gravité, sur les rouleaux 10, jusqu'à ce qu'elle arrive contre la butée télescopique 27. A cet effet, le plan formé par la série de rouleaux 10 présente une très faible inclinaison en direction de la sortie du dispositif de retournement, permettant à la pile 6 de venir s'appuyer contre la butée télescopique 27 par gravité.The batteries 6 aligned on the conveyor belt 5 are advanced to a position located at the entrance of the reversing device, position determined by the photoelectric detector, where they wait for the end of the reversal cycle of the previous battery 6, a cycle that we will describe below. A stack 6 is introduced into the collet 12 by the conveyor belt 5. When it leaves this conveyor belt 5, it rolls, by gravity, on the rollers 10, until it comes against the telescopic stop 27 For this purpose, the plane formed by the series of rollers 10 has a very small inclination towards the exit of the turning device, allowing the stack 6 to come to bear against the telescopic stop 27 by gravity.

La position de la butée télescopique 27 est réglée avec précision en fonction de la dimension de la pile 6 dans sa direction de défilement, grâce au moteur d'entraînement 21 du transporteur à tapis 11 auquel le chariot pousseur 25 est fixé.The position of the telescopic stop 27 is precisely adjusted according to the size of the stack 6 in its running direction, thanks to the drive motor 21 of the conveyor belt 11 to which the push carriage 25 is fixed.

Lorsque la pile 6 est dans la position illustrée par la figure 2, le vérin 19 déplace la série de rouleaux 10 en direction du transporteur à tapis 11, pinçant ainsi la pile 6 entre ces deux organes 10, 11, comme illustré par la figure 3.When the battery 6 is in the position illustrated by the figure 2 , the jack 19 moves the series of rollers 10 towards the conveyor belt 11, thereby pinching the stack 6 between these two members 10, 11, as illustrated by the figure 3 .

La pince de retournement 12 est alors entraînée par le moteur 24 pour la faire tourner de 180° dans le sens contraire à celui des aiguilles de la montre, amenant la pile 6 dans la position illustrée par la figure 4.The turning tong 12 is then driven by the motor 24 to rotate it 180 ° in the opposite direction to that of the hands of the watch, bringing the stack 6 to the position illustrated by the figure 4 .

Le vérin 19 écarte alors la série de rouleaux 10 du transporteur à tapis 11, libérant à la fois la pile 6 et la butée télescopique 27, en sorte que la pile 6 retournée de 180° peut être évacuée du dispositif de retournement, par le transporteur à tapis 11, en direction de la bande transporteuse 8 du prémargeur 7.The jack 19 then moves the series of rollers 10 from the conveyor belt 11, releasing both the stack 6 and the telescopic stop 27, so that the stack 6 turned 180 ° can be removed from the turning device by the conveyor. 11, in the direction of the conveyor belt 8 of the pretender 7.

Toutefois, le chariot pousseur 25 solidaire du transporteur à tapis 11 ne peut effectuer cette opération d'évacuation de la pile 6 que si le prémargeur 7 est capable de la recevoir. A cet effet, des moyens de détection tels que des moyens photoélectriques 35 (figure 4) sont disposés à la sortie du dispositif de retournement pour détecter le niveau supérieur de la pile 6 précédemment évacuée, dont les découpes de carton sont distribuées en continu vers une plieuse-colleuse (non représentée) qui se situe en aval du prémargeur 7. Dès que le niveau de la pile 6 disposée sur la bande transporteuse 8 du prémargeur 7 arrive au-dessous du niveau limite déterminé par les moyens de détection 35, le bras de support de piles 32 qui avait accompagné la pile précédente et ne pouvait pas revenir dans sa position de départ avant que le niveau de la pile 6 ne lui permette de passer, peut alors être ramené en arrière par les pignons 30 en prise avec les crémaillères 29, comme illustré par la figure 4.However, the pusher carriage 25 integral with the conveyor belt 11 can perform this evacuation operation of the stack 6 if the pre-spreader 7 is able to receive it. For this purpose, detection means such as photoelectric means 35 ( figure 4 ) are arranged at the exit of the turning device for detecting the upper level of the previously discharged pile 6, the cardboard blanks of which are distributed continuously to a folder-gluer (not shown) which is located downstream of the pre-spreader 7. From that the level of the stack 6 disposed on the conveyor belt 8 of the pre-spreader 7 reaches below the limit level determined by the detection means 35, the stack support arm 32 which had accompanied the previous stack and could not return to its starting position before the level of the stack 6 allows it to pass, can then be brought back by the pinions 30 in engagement with the racks 29, as illustrated by the figure 4 .

Le transporteur à tapis 11 peut alors déplacer la pile 6 jusqu'à ce qu'elle arrive à la hauteur des bras du support de piles 32 qui, à cet instant, se déplaceront en synchronisme avec le transporteur à tapis 11, cela jusqu'à la hauteur des jauges 36 du prémargeur 7. Les bras de support de piles 32 continueront encore leur course jusqu'à ce que la partie de support qui se trouve sous la pile 6 soit dégagée de celle-ci, de façon à ce que cette pile tombe sur les découpes résiduelles restant sur le prémargeur 7.The conveyor belt 11 can then move the stack 6 until it reaches the height of the arms of the battery holder 32 which, at this time, will move in synchronism with the conveyor belt 11, until the height of the gauges 36 of the pretender 7. The battery support arms 32 will continue their stroke until the support part which located under the pile 6 is released from it, so that this pile falls on the residual cuts remaining on the premargeur 7.

Ensuite, comme illustré par la figure 6, les bras de support de piles 32 attendront que le niveau de la pile 6 descende. Toutefois pendant ce temps, le chariot pousseur 25 revient à sa position initiale et la pince de retournement 12 tourne de 180° dans le sens des aiguilles de la montre de façon à retourner dans sa position initiale pour pouvoir recevoir une nouvelle pile 6.Then, as illustrated by figure 6 the battery support arms 32 will wait for the level of the battery 6 to descend. During this time, however, the pusher carriage 25 returns to its initial position and the collet 12 rotates 180 ° in a clockwise direction so as to return to its initial position to receive a new battery 6.

Contrairement à ce qui se produit avec le dispositif de retournement connu, la face imprimée des découpes de carton formant les piles 6 n'est pas en contact avec des rouleaux, mais avec le transporteur à tapis 11, de sorte que la première découpe de la pile n'est plus marquée par des rouleaux. De plus, la pile 6 n'est plus poussée mais transportée positivement.Unlike what happens with the known turning device, the printed face of the cardboard blanks forming the stacks 6 is not in contact with rollers, but with the conveyor belt 11, so that the first blank of the stack is no longer marked by rollers. In addition, the battery 6 is no longer pushed but positively transported.

Lors de l'évacuation des piles 6 sur la surface inclinée 8 du prémargeur, la pile passe d'une forme parallélépipédique droite à un parallélépipède dont une section droite parallèle à l'axe de défilement longitudinal des piles 6 a la forme d'un parallélogramme. En passant de la forme de parallélépipède droit à la section droite en forme de parallélogramme, les angles de la section droite de la pile, prise dans le sens longitudinal de défilement des piles, changent, ce qui provoque un glissement entre les découpes adjacentes, favorisant la séparation de ces découpes les une des autres.During the evacuation of the batteries 6 on the inclined surface 8 of the premargeur, the stack goes from a straight parallelepiped shape to a parallelepiped whose straight section parallel to the longitudinal scroll axis of the batteries 6 has the shape of a parallelogram . By moving from the right parallelepiped shape to the parallelogram-shaped straight section, the angles of the cross-section of the stack, taken in the longitudinal direction of movement of the stacks, change, which causes a slippage between the adjacent cuts, favoring the separation of these cuts one of the others.

Lors du retournement des piles 6, celles-ci appuient contre la butée télescopique 27, en sorte qu'elles sont soutenues par cette butée et ne sont pas tenues seulement par la pression des rouleaux 10 et du transporteur à tapis 11.During the overturning of the batteries 6, they bear against the telescopic stop 27, so that they are supported by this stop and are not held only by the pressure of the rollers 10 and the conveyor belt 11.

La position du chariot 25 et de sa butée 28 peut être commandée avec précision par le moteur 21 en fonction de la dimension des découpes de carton formant la pile 6.The position of the carriage 25 and its stop 28 can be precisely controlled by the motor 21 as a function of the size of the cardboard blanks forming the stack 6.

Dans certains cas, les découpes de boîtes sortant de la machine qui les a préalablement travaillées se présentent dans une position ne nécessitant pas de retournement. Il est donc possible, en jouant sur la programmation de moteurs de retournement et de transport, de faire transiter les piles de découpes au travers du dispositif sans procéder à leur retournement, tout en conservant les avantages du transport positif procurés par le présent dispositif.In some cases, the box blanks coming out of the machine that previously worked them are in a position that does not require overturning. It is therefore possible, by playing on the programming of overturning and transporting motors, to pass the stacks of cuts through the device without reversing them, while retaining the advantages of the positive transport provided by the present device.

Claims (6)

  1. Device for turning piles (6) of sheets-like material, comprising a frame (1) including an input and an output, aligned according to a longitudinal conveying path of said piles (6), a fold-over grip (12) swivelling arranged around an horizontal axis (13), transverse to said longitudinal trajectory, comprising two conveying units (10, 11) laid out opposite the one another, of which the one (10) is used for delivering said piles (6) entering the device and the other (11) for removing said piles (6) after rotation of said fold-over grip (12) around said axis (13) and means (19) to exert a pressure on said piles (6) by means of said conveying units (10, 11) during said rotation, characterized by the fact that it comprises a conveying unit including a belt conveyor (11) intended to remove said piles (6), a conveyor device comprising a series of rollers (10), a pusher carriage (25), telescopic thrusts (27) extending between said belt conveyor (11) and said series of rollers (10) and means (21) to move this belt conveyor (11) in order to let move forwards said pusher carriage (25) supporting the telescopic thrusts (27) during the stripping of a turned pile (6) and to move it alternatively backwards.
  2. Device according to claim 1, comprising a supporting device (32) laid out at the output of said fold-over grip (12) to support the front part of these piles (6), means (29, 31) to guide this supporting unit (32) in a parallel and longitudinal trajectory, driving means (30) to move said supporting unit (32) along said guiding means (31), to move it forwards in synchronism with said pusher carriage (25), means (35) to detect said piles (6) after stripping, to control the return back of said supporting unit (32) at the output of said fold-over grip (12) by means of said driving means (30).
  3. Device according to claim 2, in which the stripping end of said fold-over grip (12) is related to a feeding station of a prefeeder (7), comprising a delivery surface (8) whose level is lower than the one of the belt conveyor (11) supporting said piles during their stripping, said means (35) to detect the level of said piles (6) after stripping being arranged to ensure the return back of said supporting unit (32) when the level of the pile (6) after stripping reaches the lower level of said supporting unit (32).
  4. Device according to claim 3, in which said delivery surface (8) is slanted compared to said belt conveyor (11) used for the stripping of said piles.
  5. Device according to one of the preceding claims, comprising means (34) to detect the input of said piles (6) into said fold-over grip (12).
  6. Device according to one of the preceding claims, in which said frame (1) is assembled on wheels (2) intended to be connected to a guiding rail (3) and associated to blocking units.
EP03003946A 2002-04-03 2003-02-22 Device for overturning piles of sheet material Expired - Lifetime EP1350748B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH00561/02A CH695266A5 (en) 2002-04-03 2002-04-03 Device for return of material cell sheet.
CH5612002 2002-04-03

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EP1350748A2 EP1350748A2 (en) 2003-10-08
EP1350748A3 EP1350748A3 (en) 2005-03-02
EP1350748B1 true EP1350748B1 (en) 2008-10-15

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EP (1) EP1350748B1 (en)
JP (1) JP3619233B2 (en)
KR (1) KR100496746B1 (en)
CN (1) CN1235784C (en)
AT (1) ATE411248T1 (en)
AU (1) AU2003203466A1 (en)
BR (1) BR0300909B1 (en)
CA (1) CA2422993C (en)
CH (1) CH695266A5 (en)
DE (1) DE60324054D1 (en)
ES (1) ES2312674T3 (en)
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ATE411248T1 (en) 2008-10-15
CA2422993C (en) 2007-08-28
JP3619233B2 (en) 2005-02-09
US6793454B2 (en) 2004-09-21
DE60324054D1 (en) 2008-11-27
TWI250117B (en) 2006-03-01
ES2312674T3 (en) 2009-03-01
BR0300909B1 (en) 2011-07-26
CN1235784C (en) 2006-01-11
TW200400149A (en) 2004-01-01
BR0300909A (en) 2004-08-17
AU2003203466A1 (en) 2003-10-23
CN1448326A (en) 2003-10-15
EP1350748A3 (en) 2005-03-02
EP1350748A2 (en) 2003-10-08
KR100496746B1 (en) 2005-06-22
US20030188954A1 (en) 2003-10-09
CH695266A5 (en) 2006-02-28
JP2003306257A (en) 2003-10-28
CA2422993A1 (en) 2003-10-03
KR20030079699A (en) 2003-10-10

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