EP0937671B1 - Method and device for straightening or rotating a leaned pile of sheet material on a roller conveyer - Google Patents
Method and device for straightening or rotating a leaned pile of sheet material on a roller conveyer Download PDFInfo
- Publication number
- EP0937671B1 EP0937671B1 EP99102440A EP99102440A EP0937671B1 EP 0937671 B1 EP0937671 B1 EP 0937671B1 EP 99102440 A EP99102440 A EP 99102440A EP 99102440 A EP99102440 A EP 99102440A EP 0937671 B1 EP0937671 B1 EP 0937671B1
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- EP
- European Patent Office
- Prior art keywords
- stack
- rollers
- stop surface
- fact
- conveyance
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H31/00—Pile receivers
- B65H31/34—Apparatus for squaring-up piled articles
- B65H31/40—Separate receivers, troughs, and like apparatus for knocking-up completed piles
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- 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
- B65H2301/40—Type of handling process
- B65H2301/42—Piling, depiling, handling piles
- B65H2301/422—Handling piles, sets or stacks of articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/10—Handled articles or webs
- B65H2701/17—Nature of material
- B65H2701/176—Cardboard
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/10—Handled articles or webs
- B65H2701/17—Nature of material
- B65H2701/176—Cardboard
- B65H2701/1762—Corrugated
Definitions
- the present invention relates to a method for straightening a pile of sheet material deformed following its transport on a roller conveyor, the rollers of which are mounted around axes of parallel rotation extending transversely to the direction of transport of said stack.
- This invention also relates to a device for straighten a stack of sheet material deformed by its transport on a roller conveyor having parallel axes of rotation extending transversely to the direction of transport.
- this invention relates to the use of this device for changing orientation of stacks of sheet material.
- stacks of cutouts of cardboard undergo various operations of cutting, grooving, etc., and are therefore intended to be transported on relatively large distances from one location to another in the plant.
- stacks of cardboard blanks of up to 1.5 to 2 meters and weighing several hundred kilos, typically 500 to 750 kg, are transported by conventional roller conveyors.
- the main purpose of the present invention is to provide a solution able to remedy, at least partially, this drawback.
- this invention firstly relates to a method for straightening a stack of deformed sheet material on a conveyor rollers, in which said stack is engaged with a surface immobilization, and that one drives the axes of the rollers on which rests this pile in a translational movement directed in the direction of transport of this stack, leaving the rollers to rotate freely around their respective axes of rotation.
- This invention also relates to a device for straightening a stack of deformed cardboard cutouts on a roller conveyor, which comprises a surface for immobilizing said cell and at least one train of rollers rotatably mounted on pivot axes parallel and transverse to the transport path of said stack on said conveyor, the respective ends of these axes being associated with articulation axes of links of two respective endless chains mounted on guide and drive means and one of which strands is underlying said stack, these drive means being intended to move said rollers of the strand of said underlying chain to said pile in a translational movement in the direction of advance communicated to said battery by said transporter until rectification of it.
- the bottom leaves of the pile have a wavy shape given by the rollers and the pressure exerted by the pile, so that the rollers slide in the bottom of the corrugations formed at the base of the pile without bringing the cutouts under the pile.
- the deformation of the pile becomes dangerous for its stability from a certain transport distance, so that the device according to the invention can be arranged in the chain transport as soon as a certain transport length is reached from from which a risk may exist for the stability of the transported batteries.
- Another object of this invention consists in using the device for straightening the batteries to change their direction.
- the principle of this device allows not only to straighten the deformed piles, but also to change the orientation of these piles, allowing more flexibility to the transport chain.
- the device illustrated in Figs. 1 to 4 is a straightening conveyor stack of P sheet material, including cardboard blanks, plus particularly corrugated cardboard, which has three parallel parts, a central part 1 formed by an endless pallet chain, and two side parts 2, 3 each formed by a series of rollers 4 mounted free around respective axes 5.
- the respective ends of these axes form the axis of articulation of links of four endless chains 6, 7 for side part 2 and 8, 9 for side part 3.
- the endless chains 6, 7 pass around two pairs of wheels 10, 11 of which only the pair of wheels 11 is visible in the drawing, the pair of wheels 10 being hidden by the chains 6, 7.
- the endless chains 8, 9 pass around two pairs of wheels 12 and 13.
- the pairs of wheels 10 and 12 are integral with a common shaft 20, while the pairs of wheels 11 and 13 are integral with a common shaft 21 (Fig. 4).
- FIG. 1 A mechanism for driving these chains 6-9 is illustrated by the Figs. 1 and 3.
- This mechanism comprises a geared motor 16 comprising a double output pinion 17, each of which is engaged with a chain without end 18, 19.
- the chain 18 is engaged with a wheel 22, integral with the shaft 20, while the chain 19 is engaged with a wheel 23 integral with the shaft 21.
- the two series of rollers 4 forming the two parts sides 2 and 3 of the straightening conveyor are kinematically integral of the same shafts 20, 21, driven by the drive mechanism which has just been described.
- Another drive mechanism of the central part 1, constituted by the pallet chain, comprises a second geared motor 24 a pinion integral with the output shaft 25 is engaged with a endless chain 26 intended to transmit the movement of this tree output 25 to a drive shaft 27 of the part's pallet chain central 1.
- the pallets of the chain at pallets have two thinned side parts 1b which rest on two sliding bearings 28, in the form of Teflon® strips, by example, or metal bars coated with this material, fixed on a part of frame B of this device, underlying the upper strand of this pallet chain.
- the level of the game central 1, which corresponds to the drive part of the conveyor rectifier is slightly higher than that of the side parts 2, 3, to ensure good contact with the stack of cardboard blanks P when this device is used in its mode of transport and not in that of rectifier, as well as allowing immobilization of the battery P when the device is used in its mode of rectification of the shape of this pile P.
- this device corresponding to the implementation work of the method according to the invention consists in placing this device at the following a transport section whose length is such that it risks deformation of the battery which could endanger its stability.
- the geared motor 24 is started and the central part raised 1, formed by the pallet chain drives the stack P by the part median of this stack which rests on this pallet chain.
- the parts of this stack located on either side of this central part 1 rest on the lateral parts 2 and 3 of the conveyor, including the free rollers 4 can rotate by the friction of the base of the P-stack.
- the part control unit 1 When all the stack P is on the straightening conveyor, the part control unit 1 is stopped and the gearmotor 16 is started to drive in translation the axes of the rollers 4 of the two parts lateral 2 and 3, these axes being integral with the chains 6, 7, respectively 8, 9 at their respective ends, in the same direction as that in advance of the P stack. These chains 6-9 rotate, while leaving the rollers 4 free to rotate on their respective axes 5.
- a photocell for example, or other means of appropriate detection can detect when the P stack is rectified.
- Figs. 5 and 6 illustrate another variant of the device which comes to be described, as well as a particular use of this variant.
- the transporter formed by the pallet chain of the part central 1 of Figs. 1 to 4 does not exist.
- friction pads 29, each associated with a bent lever 30, one of which end is hinged to this shoe 29 and the other end is engaged with the rod of a jack 31, while the bent part of this lever is articulated at frame B of the straightening conveyor device.
- chains 6, 7 of part 2 of the transporter and the chains 8, 9 of its part 3 are not not integral with the same drive shafts 20 and 21, but with shafts independent drive 20a, 21a, respectively 20b, 21b, only the shafts 20a, 20b being visible in FIG. 6.
- the trees 20a, 21a, on the one hand and the shafts 20b, 21b, on the other hand, are each secured to a mechanism independent training. Since these mechanisms are in all identical to mechanism 16-19 of the form of execution of Figs. 1-4, they are neither described nor represented again for this form execution. The consequence of this independence of the two parts 2 and 3 of the carrier is to allow them to train at speeds different for the purpose that will be explained later.
- a stop mechanism illustrated in FIG. 5, is used to stop the P battery during the straightening operation.
- This mechanism is located in the middle part where the chain was pallets from part 1 in the previous embodiment.
- a stop 32 is integral with one end of a lever 33 articulated around an axis 34, integral with the frame B. The other end of this lever 33 is articulated to the rod 36 of a jack 35. In the position shown in solid lines on this Fig. 5, the stop 32 is brought by the lever 33 and the jack 35 in a position transverse to the path of the stack of cardboard blanks P.
- the jacks 31 apply the pads 29 against the respective upper strands of the two roller chains 4 of the lateral parts 2 and 3 of the conveyor device rectifier. Once these pads are applied against the rollers 4, the drive mechanisms of chains 6, 7, respectively 8, 9, are started at the same speed, driving these chains and the rollers 4 which are integral therewith. Since at the same time the pads 29 are pressed against the rollers 4 of the upper strands, these rollers are no longer free as before, but they are driven in rotation by their translational movement relative to the pads 29 that are applied against them. Therefore, the battery P is driven on the straightening device.
- the stop 32 is placed in the position illustrated in solid lines on Fig. 5, so that the battery P is stopped as soon as it encounters this stop 32.
- the roller chains 4 are immobilized and the pads 29 are retracted so that the free rollers can now rotate around of their respective axes of rotation 5.
- the roller chains are then restarted, but, since the rollers 4 have been released, they roll under the effect of their friction under the P pile, consecutive to displacement of their axes of rotation in translation in the direction in advance of stack P.
- the cardboard cutouts of the bottom of the P stack that had shifted relative to the rest of the stack are gradually brought back under the P pile, which thus regains its shape initial parallelepiped.
- the device according to FIGS. 5 and 6 can still have, in the central occupied part, in Figs. 1-4, by the pallet chain 1 and which is released in the variant of Figs. 5 and 6, a mechanism for changing the orientation of the batteries after having them restated.
- This device comprises in its center a disc 37 with a vertical axis, integral with the rod of a jack 38.
- This disc can occupy two positions corresponding to two different levels, one located below that upper strands of roller chains 4, the other located slightly above the level of the upper strands of these roller chains 4.
- This upper level of disc 37 corresponds substantially to that of the strand upper of the pallet conveyor 1 of the embodiment of Figs. 1-4.
- Two centering bars 39, integral with two cylinder rods respective 40 are arranged on either side of the transporter, above the upper strands of the roller chains 4 and share and on the other side of the displacement path of stack P. These bars of centering are used to position the stack exactly in the center of the width of the straightening conveyor. This is necessary so that when the P stack is lifted by the disc 37, it is well balanced on it.
Description
La présente invention se rapporte à un procédé pour redresser une pile de matériau en feuilles déformée consécutivement à son transport sur un transporteur à rouleaux dont les rouleaux sont montés autour d'axes de rotation parallèles s'étendant transversalement à la direction de transport de ladite pile. Cette invention se rapporte également à un dispositif pour redresser une pile de matériau en feuilles déformée par son transport sur un transporteur à rouleaux présentant des axes de rotation parallèles s'étendant transversalement à la direction de transport. Enfin, cette invention se rapporte à une utilisation de ce dispositif pour changer l'orientation de piles de matériau en feuilles.The present invention relates to a method for straightening a pile of sheet material deformed following its transport on a roller conveyor, the rollers of which are mounted around axes of parallel rotation extending transversely to the direction of transport of said stack. This invention also relates to a device for straighten a stack of sheet material deformed by its transport on a roller conveyor having parallel axes of rotation extending transversely to the direction of transport. Finally, this invention relates to the use of this device for changing orientation of stacks of sheet material.
Dans les fabriques d'emballages en carton formés par pliage de découpes de carton, de carton ondulé en particulier, les piles de découpes de carton subissent divers opérations de découpage, de rainurage, d'impression etc., et sont de ce fait appelées à être transportées sur des distances relativement importantes d'un endroit à un autre de l'usine. A cet effet, les piles de découpes de cartons pouvant atteindre de 1,5 à 2 mètres et pesant plusieurs centaines de kilos, typiquement de 500 à 750 kg, sont transportées par des transporteurs à rouleaux de type classique.In cardboard packaging factories formed by folding cardboard cutouts, corrugated board in particular, stacks of cutouts of cardboard undergo various operations of cutting, grooving, etc., and are therefore intended to be transported on relatively large distances from one location to another in the plant. In this indeed, stacks of cardboard blanks of up to 1.5 to 2 meters and weighing several hundred kilos, typically 500 to 750 kg, are transported by conventional roller conveyors.
Compte tenu de la pression exercée sur les feuilles du bas de la pile, ces rouleaux font subir à la feuille qui repose sur eux, plus particulièrement lorsque cette feuille est en carton ondulé, un mouvement de reptation qui ralentit le déplacement de cette feuille par rapport au reste de la pile. Ce mouvement de reptation se transmet progressivement de proche en proche sur une épaisseur de quelques centimètres à la base de la pile, lui donnant un profil en forme de patte d'éléphant. Cette déformation est bien entendu fonction de la distance parcourue par la pile, de sorte qu'elle peut finalement atteindre une valeur telle qu'elle risque de faire tomber la pile. Bien entendu un tel risque présente un danger pour la sécurité, compte tenu du poids et de la hauteur de ces piles et la chute d'une telle pile représente aussi un incident qui coûte cher en terme de production et des dégâts qui peuvent être causés aux découpes elles-mêmes.Given the pressure exerted on the bottom leaves of the stack, these rolls subject the sheet that rests on them, plus especially when this sheet is made of corrugated cardboard, a movement crawling which slows the movement of this sheet compared to the rest from the stack. This crawling movement is gradually transmitted from step by step over a thickness of a few centimeters at the base of the pile, giving it an elephant-like profile. This deformation is of course a function of the distance traveled by the pile, so that it can ultimately reach a value such that it risks drop the battery. Of course such a risk presents a danger to the safety, given the weight and height of these batteries and the fall such a battery also represents an incident which is expensive in terms of production and damage that can be caused to the cuts themselves.
Le but principal de la présente invention est d'apporter une solution apte à remédier, au moins partiellement, à cet inconvénient.The main purpose of the present invention is to provide a solution able to remedy, at least partially, this drawback.
A cet effet, cette invention a tout d'abord pour objet un procédé pour redresser une pile de matériau en feuilles déformée sur un transporteur à rouleaux, selon lequel on met ladite pile en prise avec une surface d'immobilisation, et que l'on entraíne les axes des rouleaux sur laquelle repose cette pile en un mouvement de translation dirigé dans le sens de transport de cette pile, en laissant les rouleaux tourner librement autour de leurs axes de rotation respectifs.To this end, this invention firstly relates to a method for straightening a stack of deformed sheet material on a conveyor rollers, in which said stack is engaged with a surface immobilization, and that one drives the axes of the rollers on which rests this pile in a translational movement directed in the direction of transport of this stack, leaving the rollers to rotate freely around their respective axes of rotation.
Cette invention a également pour objet un dispositif pour redresser une pile de découpes de carton déformée sur un transporteur à rouleaux, qui comporte une surface d'immobilisation de ladite pile et au moins un train de rouleaux montés rotativement sur des axes de pivotement parallèles et transversaux à la trajectoire de transport de ladite pile sur ledit transporteur, les extrémités respectives de ces axes étant associées à des axes d'articulation de maillons de deux chaínes respectives sans fins montées sur des moyens de guidage et d'entraínement et dont un des brins est sous-jacent à ladite pile, ces moyens d'entraínement étant destinés à déplacer lesdits rouleaux du brin de ladite chaíne sous-jacent à ladite pile en un mouvement de translation dans le sens d'avance communiqué à ladite pile par ledit transporteur jusqu'au redressement de celle-ci.This invention also relates to a device for straightening a stack of deformed cardboard cutouts on a roller conveyor, which comprises a surface for immobilizing said cell and at least one train of rollers rotatably mounted on pivot axes parallel and transverse to the transport path of said stack on said conveyor, the respective ends of these axes being associated with articulation axes of links of two respective endless chains mounted on guide and drive means and one of which strands is underlying said stack, these drive means being intended to move said rollers of the strand of said underlying chain to said pile in a translational movement in the direction of advance communicated to said battery by said transporter until rectification of it.
Contrairement à ce que l'on pourrait croire au premier abord, il ne suffit pas de faire tourner les rouleaux d'entraínement en sens inverse en retenant l'avant de la pile. En effet, dans ce cas, les feuilles du bas de la pile ont une forme ondulée donnée par les rouleaux et la pression exercée par la pile, de sorte que les rouleaux glissent dans le fond des ondulations formées à la base de la pile sans ramener les découpes sous la pile. Comme on l'a mentionné précédemment, la déformation de la pile devient dangereuse pour sa stabilité à partir d'une certaine distance de transport, de sorte que le dispositif selon l'invention peut être disposé dans la chaíne de transport dès qu'une certaine longueur de transport est atteinte à partir de laquelle un risque peut exister pour la stabilité des piles transportées.Contrary to what one might think at first, it does not not enough to rotate the drive rollers in reverse retaining the front of the stack. Indeed, in this case, the bottom leaves of the pile have a wavy shape given by the rollers and the pressure exerted by the pile, so that the rollers slide in the bottom of the corrugations formed at the base of the pile without bringing the cutouts under the pile. As previously mentioned, the deformation of the pile becomes dangerous for its stability from a certain transport distance, so that the device according to the invention can be arranged in the chain transport as soon as a certain transport length is reached from from which a risk may exist for the stability of the transported batteries.
Un autre but de cette invention consiste à utiliser le dispositif de redressement des piles pour changer leur direction. On a en effet constaté que le principe de ce dispositif permet non seulement de redresser les piles déformées, mais également de changer l'orientation de ces piles, permettant de donner une plus grande souplesse à la chaíne de transport.Another object of this invention consists in using the device for straightening the batteries to change their direction. We have indeed found that the principle of this device allows not only to straighten the deformed piles, but also to change the orientation of these piles, allowing more flexibility to the transport chain.
D'autres particularités et avantages de la présente invention apparaítront à la lumière de la description qui va suivre ainsi que du dessin annexé qui illustre, schématiquement et à titre d'exemple, une forme d'exécution du dispositif pour la mise en oeuvre du procédé, tous deux objets de la présente invention.
- Fig. 1 est une vue de dessus de cette forme d'exécution;
- Fig. 2 est une vue en coupe selon la ligne II-II de la Fig. 1;
- Fig. 3 est une vue en coupe selon la ligne III-III de la Fig. 1;
- Fig. 4 est une vue en coupe selon la ligne IV-IV de la Fig. 2;
- Fig. 5 est une vue en coupe d'une variante de la Fig. 2;
- Fig. 6 est une vue en coupe semblable à celle de la Fig. 3, illustrant une variante du dispositif permettant son utilisation pour modifier l'orientation de la pile de matériau en feuilles.
- Fig. 1 is a top view of this embodiment;
- Fig. 2 is a sectional view along the line II-II of FIG. 1;
- Fig. 3 is a sectional view along line III-III of FIG. 1;
- Fig. 4 is a sectional view along the line IV-IV of FIG. 2;
- Fig. 5 is a sectional view of a variant of FIG. 2;
- Fig. 6 is a sectional view similar to that of FIG. 3, illustrating a variant of the device allowing its use to modify the orientation of the stack of sheet material.
Le dispositif illustré par les Figs. 1 à 4 est un convoyeur redresseur
de pile de matériau en feuille P, notamment de découpes de carton, plus
particulièrement de carton ondulé, qui comporte trois parties parallèles,
une partie centrale 1 formée par une chaíne à palettes sans fin, et deux
parties latérales 2, 3 formées chacune par une série de rouleaux 4 montés
libres autour d'axes respectifs 5. Les extrémités respectives de ces axes
forment l'axe d'articulation de maillons de quatre chaínes sans fins 6, 7
pour la partie latérale 2 et 8, 9 pour la partie latérale 3. The device illustrated in Figs. 1 to 4 is a straightening conveyor
stack of P sheet material, including cardboard blanks, plus
particularly corrugated cardboard, which has three parallel parts,
a central part 1 formed by an endless pallet chain, and two
Les chaínes sans fins 6, 7 passent autour de deux paires de roues
10, 11 dont seule la paire de roue 11 est visible sur le dessin, la paire de
roues 10 étant cachée par les chaínes 6, 7. Les chaínes sans fins 8, 9
passent autour de deux paires de roues 12 et 13. Les paires de roues 10
et 12 sont solidaires d'un arbre commun 20, tandis que les paires de roues
11 et 13 sont solidaires d'un arbre commun 21 (Fig.4).The
Les brins supérieurs de chacune de ces chaínes sans fins 6-9 passent sur des guides, constitués par les bords de plaques de support, dont l'une 14 est visible sur la Fig. 2, ces plaques étant coplanaires avec les roues 11-13 illustrées par la Fig. 4.The upper strands of each of these endless chains 6-9 pass over guides, formed by the edges of support plates, one of which 14 is visible in FIG. 2, these plates being coplanar with the wheels 11-13 illustrated in FIG. 4.
Les brins inférieurs de ces mêmes chaínes sans fins 6-9 passent sur
un pignon tendeur 15 (Fig. 2). Ainsi, les rouleaux 4 de chaque partie
latérale 2 et 3 sont libres de tourner autour de leurs axes respectifs, ces
axes étant solidaires à leurs extrémités respectives de deux chaínes sans
fins 6, 7, respectivement 8, 9.The lower strands of these same endless chains 6-9 pass over
a tensioning pinion 15 (Fig. 2). So the
Un mécanisme d'entraínement de ces chaínes 6-9 est illustré par les
Figs. 1 et 3. Ce mécanisme comporte un motoréducteur 16 comprenant un
double pignon de sortie 17, dont chacun est en prise avec une chaíne sans
fin 18, 19. La chaíne 18 est en prise avec une roue 22, solidaire de l'arbre
20, tandis que la chaíne 19 est en prise avec une roue 23 solidaire de
l'arbre 21. Ainsi, les deux séries de rouleaux 4 formant les deux parties
latérales 2 et 3 du convoyeur redresseur sont cinématiquement solidaires
des mêmes arbres 20, 21, entraínés par le mécanisme d'entraínement qui
vient d'être décrit.A mechanism for driving these chains 6-9 is illustrated by the
Figs. 1 and 3. This mechanism comprises a geared
Un autre mécanisme d'entraínement de la partie centrale 1,
constituée par la chaíne à palettes, comporte un second motoréducteur 24
dont un pignon solidaire de l'arbre de sortie 25 est en prise avec une
chaíne sans fin 26 destinée à transmettre le mouvement de cet arbre de
sortie 25 à un arbre d'entraínement 27 de la chaíne à palettes de la partie
centrale 1. Comme on le voit sur la Fig. 4, les palettes la de la chaíne à
palettes présentent deux parties latérales amincies 1b qui reposent sur
deux coussinets de glissement 28, en forme de bandes de Teflon®, par
exemple, ou de barres métalliques revêtues de ce matériau, fixées sur une
partie du bâti B de ce dispositif, sous-jacente au brin supérieur de cette
chaíne à palettes. Comme on le voit sur la Fig. 4, le niveau de la partie
centrale 1, qui correspond à la partie d'entraínement du convoyeur
redresseur est légèrement plus élevé que celui des parties latérales 2, 3,
afin d'assurer un bon contact avec la pile de découpes de carton P lorsque
ce dispositif est utilisé dans son mode de transport et non dans celui de
redresseur, ainsi qu'à permettre d'immobiliser la pile P lorsque le dispositif
est utilisé dans son mode de redressement de la forme de cette pile P.Another drive mechanism of the central part 1,
constituted by the pallet chain, comprises a second geared motor 24
a pinion integral with the
Le fonctionnement de ce dispositif, correspondant à la mise en
oeuvre du procédé selon l'invention consiste à disposer ce dispositif à la
suite d'une section de transport dont la longueur est telle qu'elle risque de
produire une déformation de la pile susceptible de mettre en danger sa
stabilité. Lorsque la pile P arrive sur le dispositif convoyeur redresseur
décrit, le motoréducteur 24 est mis en marche et la partie centrale
surélevée 1, formée par la chaíne à palettes entraíne la pile P par la partie
médiane de cette pile qui repose sur cette chaíne à palettes. Les parties de
cette pile situées de part et d'autre de cette partie centrale 1 reposent sur
les parties latérales 2 et 3 du transporteur, dont les rouleaux 4 libres
peuvent tourner par le frottement de la base de la pile P.The operation of this device, corresponding to the implementation
work of the method according to the invention consists in placing this device at the
following a transport section whose length is such that it risks
deformation of the battery which could endanger its
stability. When the stack P arrives on the straightening conveyor device
described, the geared
Lorsque toute la pile P est sur le convoyeur redresseur, la partie
centrale 1 est arrêtée et c'est le motoréducteur 16 qui est mis en marche
pour entraíner en translation les axes des rouleaux 4 des deux parties
latérales 2 et 3, ces axes étant solidaires des chaínes 6, 7, respectivement
8, 9 à leurs deux extrémités respectives, dans le même sens que celui
d'avance de la pile P. Ces chaínes 6-9 tournent, tout en laissant les
rouleaux 4 libres de tourner sur leurs axes respectifs 5.When all the stack P is on the straightening conveyor, the part
control unit 1 is stopped and the
Etant donné que le centre de la pile P repose sur la partie centrale 1 surélevée du transporteur, cette pile ne peut pas avancer, mais le mouvement des chaínes de rouleaux latérales provoque petit à petit le déplacement des feuilles du bas de la pile qui ont subit un décalage en forme de patte d'éléphant lors du transport précédent. Since the center of the P stack rests on the central part 1 raised from the carrier, this stack cannot advance, but the movement of the side roller chains gradually causes the moving the sheets at the bottom of the stack which have been shifted by shape of an elephant's leg during the previous transport.
Une cellule photoélectrique, par exemple, ou d'autres moyens de détection appropriés peuvent détecter le moment où là pile P est redressée.A photocell, for example, or other means of appropriate detection can detect when the P stack is rectified.
Les Figs. 5 et 6 illustrent une autre variante du dispositif qui vient
d'être décrit, ainsi qu'une utilisation particulière de cette variante. Dans
cette variante, le transporteur formé par la chaíne à palettes de la partie
centrale 1 des Figs. 1 à 4 n'existe pas. Ce sont les rouleaux 4 eux-mêmes
qui servent à entraíner la pile P sur le convoyeur redresseur. A cet effet,
des patins de friction 29, associés chacun à un levier coudé 30 dont une
extrémité est articulée à ce patin 29 et l'autre extrémité est en prise avec la
tige d'un vérin 31, tandis que la partie coudée de ce levier est articulée au
bâti B du dispositif convoyeur redresseur.Figs. 5 and 6 illustrate another variant of the device which comes
to be described, as well as a particular use of this variant. In
this variant, the transporter formed by the pallet chain of the part
central 1 of Figs. 1 to 4 does not exist. These are the
Contrairement à la forme d'exécution des Figs. 1 à 4, les chaínes 6,
7 de la partie 2 du transporteur et les chaínes 8, 9 de sa partie 3 ne sont
pas solidaires des mêmes arbres d'entraínement 20 et 21, mais d'arbres
d'entraínement indépendants 20a, 21a, respectivement 20b, 21b, seuls les
arbres 20a, 20b étant visibles sur la Fig. 6. Les arbres 20a, 21a, d'une part
et les arbres 20b, 21 b, d'autre part sont chacun solidaires d'un mécanisme
d'entraínement indépendant. Etant donné que ces mécanismes sont en
tous points identiques au mécanisme 16-19 de la forme d'exécution des
Figs. 1-4, il ne sont ni décrits ni représentés à nouveau pour cette forme
d'exécution. La conséquence de cette indépendance des deux parties 2 et
3 du transporteur est de permettre de les entraíner à des vitesses
différentes dans le but que l'on expliquera par la suite.Unlike the embodiment of Figs. 1 to 4,
Etant donné que la partie centrale 1 de la forme d'exécution des
Figs. 1-4 n'existe plus, un mécanisme de butée, illustré par la Fig. 5, est
utilisé pour arrêter la pile P lors de l'opération de redressement. Ce
mécanisme se situe dans la partie médiane où se trouvait la chaíne à
palettes de la partie 1 dans la forme d'exécution précédente. Une butée 32
est solidaire d'une extrémité d'un levier 33 articulé autour d'un axe 34,
solidaire du bâti B. L'autre extrémité de ce levier 33 est articulée à la tige
36 d'un vérin 35. Dans la position représentée en trait continu sur cette
Fig. 5, la butée 32 est amenée par le levier 33 et le vérin 35 dans une
position transversale à la trajectoire de la pile de découpes de carton P. En
actionnant le vérin 35 en sens inverse, c'est-à-dire en faisant rentrer la tige
dans le vérin 35, le levier 33 pivote dans le sens contraire à celui des
aiguilles de la montre, et escamote la butée dans une position où elle ne
se trouve plus dans la trajectoire de la pile P.Since the central part 1 of the embodiment of the
Figs. 1-4 no longer exists, a stop mechanism, illustrated in FIG. 5, is
used to stop the P battery during the straightening operation. This
mechanism is located in the middle part where the chain was
pallets from part 1 in the previous embodiment. A
Dans cette variante, lorsqu'une pile de découpes de carton P est
amenée par le transporteur à rouleaux (non représenté) qui se situe en
amont du dispositif à l'extrémité d'entrée de celui-ci, les vérins 31
appliquent les patins 29 contre les brins supérieurs respectifs des deux
chaínes à rouleaux 4 des parties latérales 2 et 3 du dispositif convoyeur
redresseur. Une fois que ces patins sont appliqués contre les rouleaux 4,
les mécanismes d'entraínement des chaínes 6, 7, respectivement 8, 9,
sont mis en marche à la même vitesse, entraínant ces chaínes ainsi que
les rouleaux 4 qui en sont solidaires. Etant donné qu'en même temps les
patins 29 sont pressés contre les rouleaux 4 des brins supérieurs, ces
rouleaux ne sont plus libres comme précédemment, mais ils sont entraínés
en rotation par leur déplacement en translation par rapport aux patins 29
qui sont appliqués contre eux. De ce fait, la pile P est entraínée sur le
dispositif de redressement.In this variant, when a stack of cardboard blanks P is
brought by the roller conveyor (not shown) which is located
upstream of the device at the inlet end thereof, the
La butée 32 est placée dans la position illustrée en trait continu sur
la Fig. 5, de sorte que la pile P est arrêtée dès qu'elle rencontre cette
butée 32. Les chaínes à rouleaux 4 sont immobilisées et les patins 29 sont
escamotés afin de laisser maintenant les rouleaux libres de tourner autour
de leurs axes de rotation 5 respectifs. Les chaínes à rouleaux sont alors
remises en marche, mais, étant donné que les rouleaux 4 ont été libérés,
ils roulent sous l'effet de leur frottement sous la pile P, consécutif au
déplacement de leurs axes de rotation en translation dans le sens
d'avance de la pile P. Comme précédemment, les découpes de carton du
bas de la pile P qui s'étaient décalées par rapport au reste de la pile sont
progressivement ramenées sous la pile P, qui retrouve ainsi sa forme
parallélépipédique initiale. The
Dans une seconde variante, le dispositif selon les Figs. 5 et 6 peut encore comporter, dans la partie centrale occupée, dans les Figs. 1-4, par la chaíne à palettes 1 et qui se trouve libérée dans la variante des Figs. 5 et 6, un mécanisme pour changer l'orientation des piles après les avoir redressées.In a second variant, the device according to FIGS. 5 and 6 can still have, in the central occupied part, in Figs. 1-4, by the pallet chain 1 and which is released in the variant of Figs. 5 and 6, a mechanism for changing the orientation of the batteries after having them restated.
Ce dispositif comporte en son centre un disque 37 à axe vertical,
solidaire de la tige d'un vérin 38. Ce disque peut occuper deux positions
correspondant à deux niveaux différents, l'un situé au-dessous de celui
des brins supérieurs des chaínes à rouleaux 4, l'autre situé légèrement
au-dessus du niveau des brins supérieurs de ces chaínes à rouleaux 4. Ce
niveau supérieur du disque 37 correspond sensiblement à celui du brin
supérieur du transporteur à palettes 1 de la forme d'exécution des Figs.
1-4. Deux barres de centrage 39, solidaires de deux tiges de vérins
respectives 40 sont disposées de part et d'autre du transporteur,
au-dessus des brins supérieurs des chaínes à rouleaux 4 et de part et
d'autre de la trajectoire de déplacement de la pile P. Ces barres de
centrage servent à positionner la pile exactement au centre de la largeur
du convoyeur redresseur. Ceci est nécessaire pour que, lorsque la pile P
est soulevée par le disque 37, elle se trouve bien équilibrée sur lui.This device comprises in its center a
Lorsque l'on veut tourner la pile P, on la soulève légèrement à l'aide
du disque 37, et on actionne les deux chaínes à rouleaux 4 en sens
inverse l'une de l'autre, afin de créer un couple centré autour de l'axe du
disque, de sorte que la pile peut ainsi tourner autour de cet axe, de l'angle
désiré. Il s'agit donc d'une variante d'utilisation de cette forme d'exécution
du convoyeur redresseur objet de l'invention.When you want to turn the P battery, you lift it slightly using
of the
Claims (8)
- Method for straightening a stack (P) of sheet material that has been deformed after conveyance on a roller conveyor, the rollers (4) of which are mounted around parallel axes of rotation (5) extending transverse to the conveyance direction of said stack (P), characterized in that the stack (P) is placed in engagement with a stop surface (1, 32) and in that the shafts (5) of the rollers (4) on which the stack (P) rests are driven in translation in the direction of conveyance of the stack (P), allowing the rollers (4) to rotate freely around their respective axes of rotation (5).
- Device for straightening a stack (P) of sheet material deformed by conveyance on a roller conveyor (4) having parallel axes of rotation (5) extending transverse to the conveyance direction, characterized by the fact that the device comprises a stop surface (1, 32) for said stack (P) and at least one train of rollers (4) mounted for rotation around parallel axes of rotation (5) transverse to the direction of conveyance of the stack (P) on said conveyor, the respective ends of the shafts (5) being associated with shafts coupling the links of two respective endless chains (6, 7; 8, 9) mounted on guide and drive means (10, 11; 12, 13; 16 - 23), one run of the chain being underneath said stack (P), the drive means being adapted to move the rollers (4) of the run of said chain underneath said stack (P) in translation in the direction of conveyance, the translation movement being conveyed to said stack (P) by said conveyor until the stack is straightened.
- Device according to claim 2, characterized by the fact that said stop surface comprises an abutment (32) movable between at least two positions, in one position of which it is arranged transverse to the path of the stack (P) on the roller conveyor (4) whereas in the other of which it is retracted from the path, and means (33 - 36) for moving the abutment (32) from one said position to the other.
- Device according to claim 2, characterized by the fact that the stop surface is located between the portions of two roller trains (4), the shafts (5) of the rollers (4) in each train being associated with the shafts coupling the links of two respective endless chains (6, 7; 8, 9) forming the runs of said endless chains (6, 7; 8, 9) under said stack (P), this stop surface comprising a raised surface (1; 37) situated between the two roller trains (4) at the centre of the path of the stack (P).
- Device according to claim 4, characterized by the fact that the stop surface comprises an endless pallet chain (1) associated with drive means (24 - 27) independent of the drive means (16 - 23) of said endless chains (6, 7; 8, 9).
- Device according to claim 4, characterized by the fact that it comprises braking means (29 - 31) adapted to engage the rollers (4) situated in the parts of said roller trains (4) associated with the upper runs of said endless chains (6, 7; 8, 9) so as to drive the rollers (4) around their respective axes (5) when they are driven in translation by said chains (6, 7; 8, 9).
- Device according to claim 4, characterized by the fact that the stop surface (37) comprises a horizontal surface adapted to occupy two vertical positions, one above and the other below the level of the upper parts of said roller trains (4), the horizontal surface being mounted for pivoting around a vertical axis.
- Use of the device according to claims 6 and 7 for rotating the stack (P) of cardboard blanks, characterized by the fact that said horizontal stop surface (37) is brought above the level of the upper parts of the roller trains (4) and that the braking means (29 - 31) are applied thereto so as to drive the two pairs of endless chains (6, 7; 8, 9) in two opposite directions so as to rotate said stack (P) around the vertical pivoting axis of said horizontal stop surface (37).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9802231 | 1998-02-19 | ||
FR9802231A FR2774976B1 (en) | 1998-02-19 | 1998-02-19 | METHOD AND DEVICE FOR STRAIGHTENING AND / OR ORIENTING A PILE OF SHEET MATERIAL DEFORMED ON A ROLLER CONVEYOR |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0937671A1 EP0937671A1 (en) | 1999-08-25 |
EP0937671B1 true EP0937671B1 (en) | 2002-07-17 |
Family
ID=9523314
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99102440A Expired - Lifetime EP0937671B1 (en) | 1998-02-19 | 1999-02-09 | Method and device for straightening or rotating a leaned pile of sheet material on a roller conveyer |
Country Status (5)
Country | Link |
---|---|
US (1) | US6045322A (en) |
EP (1) | EP0937671B1 (en) |
DE (1) | DE69902110T2 (en) |
ES (1) | ES2180235T3 (en) |
FR (1) | FR2774976B1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7798312B2 (en) * | 2002-12-31 | 2010-09-21 | Shuttleworth, Inc. | Compression passing roller |
CN103693489A (en) * | 2013-12-03 | 2014-04-02 | 安徽嘉隆印刷有限公司 | Corrugated paper blanking table |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3225684A (en) * | 1964-09-02 | 1965-12-28 | Signode Corp | Machine for tying bundles |
US3894627A (en) * | 1973-06-01 | 1975-07-15 | Fmc Corp | Conveyor for interspacing articles |
AU511481B2 (en) * | 1976-12-14 | 1980-08-21 | Gerrard Wire Tying Machines Co. | Bundle squaring machine |
US4142625A (en) * | 1977-12-02 | 1979-03-06 | Bourgeois Ronald D | Holding conveyor system |
IT8135819V0 (en) * | 1981-05-20 | 1981-05-20 | Giampiero Giusti | AUTOMATIC STACKER FOR LEAF STACKS |
JPH0763783B2 (en) * | 1988-07-07 | 1995-07-12 | アイダエンジニアリング株式会社 | Distuck feeder |
DE4000263A1 (en) * | 1990-01-03 | 1991-07-04 | System Gmbh | DEVICE FOR STRAIGHTING STACKS |
DE4437915C1 (en) * | 1994-10-22 | 1996-05-15 | Kodak Ag | Device for accurate edge alignment of rectangular paper sheets to form stack |
-
1998
- 1998-02-19 FR FR9802231A patent/FR2774976B1/en not_active Expired - Fee Related
-
1999
- 1999-02-09 EP EP99102440A patent/EP0937671B1/en not_active Expired - Lifetime
- 1999-02-09 DE DE69902110T patent/DE69902110T2/en not_active Expired - Lifetime
- 1999-02-09 ES ES99102440T patent/ES2180235T3/en not_active Expired - Lifetime
- 1999-02-18 US US09/247,833 patent/US6045322A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE69902110T2 (en) | 2003-02-06 |
FR2774976B1 (en) | 2000-04-14 |
FR2774976A1 (en) | 1999-08-20 |
ES2180235T3 (en) | 2003-02-01 |
EP0937671A1 (en) | 1999-08-25 |
US6045322A (en) | 2000-04-04 |
DE69902110D1 (en) | 2002-08-22 |
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