EP0795502A1 - Rotation device for rotating sheets on a roller conveyor - Google Patents

Rotation device for rotating sheets on a roller conveyor Download PDF

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Publication number
EP0795502A1
EP0795502A1 EP97102765A EP97102765A EP0795502A1 EP 0795502 A1 EP0795502 A1 EP 0795502A1 EP 97102765 A EP97102765 A EP 97102765A EP 97102765 A EP97102765 A EP 97102765A EP 0795502 A1 EP0795502 A1 EP 0795502A1
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EP
European Patent Office
Prior art keywords
stop
rollers
rotation
roller
sheets
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Granted
Application number
EP97102765A
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German (de)
French (fr)
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EP0795502B1 (en
Inventor
Luc Coyette
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C P Bourg SA
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C P Bourg SA
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Publication of EP0795502A1 publication Critical patent/EP0795502A1/en
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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
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/18—Feeding articles separated from piles; Feeding articles to machines by rotary dials or tables
    • 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

Definitions

  • the present invention relates to a device for rotating sheets on a roller conveyor defining a transport plane and provided with a longitudinal stop for aligning the sheets.
  • the sheets emerging at a rapid rate from a reproduction machine such as a printer can appear in one or the other of two perpendicular orientations.
  • the sheets are brought by a conveyor to a finishing machine. If the finishing machine is designed to process the sheets in only one of the two possible orientations, and if the sheets brought by the conveyor are in the other of the two orientations, they must be turned in their plane by an angle of 90 °.
  • the present invention provides a device for rotating sheets capable of turning them in their plane by an angle of 90 ° without interrupting or slowing down their movement on the conveyor, and without risk of damage.
  • the sheet rotation device is characterized in that it comprises a pair of rollers driven in rotation at different speeds and spaced from one another and from said stop transversely to the latter each of said rollers having its axis of rotation inclined relative to normal to said stop, by a determined angle which is greater for that of the rollers which is closer to said stop and whose rotation speed is the lowest, and each of said rollers having its periphery in contact with a rotary support element, or with the underside of a sheet during its passage, substantially in said transport plane.
  • the sheets passing over them continue their trajectory on the conveyor rollers while being braked in a controlled manner in their area close to the alignment stop, so that they are turned as they pass over the rollers.
  • the sheets are moved away from the alignment stop. Since the edge of each sheet is therefore far from the alignment stop when it passes over the rollers, the front corner of the sheet close to this stop is not likely to collide against it, and any risk of damaging the sheet.
  • a roller conveyor is used which automatically corrects a registration defect in the sheets received.
  • the rotation speed ratio of the rollers is 1: 2, and the rotation speed of that of the rollers which is further from the stop is determined so as to present, parallel to the stop, a component which is equal to that of the conveyor rollers.
  • the transport of the sheets on the conveyor is not disturbed by the rotation phase.
  • the synchronization of the rotation of the rollers with that of the conveyor roller is automatically ensured by a common drive mechanism.
  • a sheet rotation device is integrated in a horizontal conveyor 12 provided with a series of parallel rollers 14.
  • the conveyor 12 has a stop 16 sheet alignment.
  • the rollers 14 are inclined relative to the normal to the stop 16 by an angle ⁇ which is of the order of 10 °, in a direction such that the sheets F passing over the rollers 14 are permanently biased towards the stop 16.
  • the rollers 14 which are driven in rotation by a mechanism which will be described later with reference to FIGS. 3 and 4, each cooperate with a support ball 18 mounted with free rotation in a cylindrical guide element in line with each end of rollers close to the stop 16.
  • the rotation device 10 essentially consists of a pair of rollers 20, 22 spaced from one another and of the stop 16 perpendicular thereto.
  • the roller 20 further from the stop 16 than the roller 22, is rotated at a speed twice that of the roller 22.
  • the axes of rotation of the rollers 20,22 are inclined by compared to normal to the stop 16 by an angle ⁇ and ⁇ , respectively, greater for the roller 22 which is closer to the stop 16.
  • the inclination of the axes of rotation of the rollers 20, 22 is such that these axes intersect in a fictitious center of rotation C of the leaves.
  • a support element in the form of a ball 24, 26 is associated with the rollers 20, 22, respectively.
  • the balls 24, 26 are mounted for free rotation in cylindrical guide elements 28, 30 fixed on a pivoting arm 32 whose pivot axis 34 is at one end of the arm 32.
  • the guides 28.30 each have an opening in their bottom, allowing the surface of the balls 24, 26 to pass so that they come into contact with the periphery of the associated roller 20, 22.
  • the contact between the rollers 20, 22 and the balls 24, 26 takes place at the level of the sheet transport plane P, defined by the upper face of the rollers 14.
  • a common drive mechanism is provided for the rollers 14 and the rollers 20, 22.
  • This mechanism comprises a distribution shaft 40 carrying at one of its ends a pulley 42 driven in rotation by the 'through a belt 44 from a source not shown.
  • This source can be a drive motor for the conveyor 12 or a power take-off on any machine with which the conveyor is associated, for example a finishing machine.
  • the distribution shaft 40 carries two other pulleys, 46, 48, the first of which controls, by means of a belt 50, the movement of a wide belt 52 dragged on a tensioner roller system 54 a, b, c and d, and engaging frictionally the underside of the rollers 14.
  • the other pulley 48 controls, through a belt 56, the rotation of a drive shaft 58 which has, at each of its ends, a groove 60 , 62 in which a belt 64 and 66, respectively, is engaged.
  • the diameter of the groove 60 is twice that of the groove 62.
  • the rollers 20 and 22 are driven in rotation by means of the belts 64 and 66, respectively.
  • a sheet f is present at the entry of the conveyor 12, typically transversely to the stop 16 and with an offset B relative to the latter.
  • the sheet f is received at a relatively high speed, on the order of one meter per second or more.
  • the sheet f is engaged by the rollers 14, it is permanently subjected to a biasing force towards the stop 16 due to the inclination of the rollers.
  • the sheet is therefore correctly aligned with respect to the stop 16.
  • the sheet When it is engaged between the rollers 20, 22 and the balls 24, 26, the sheet begins a complex movement of translation and rotation. This movement is due to the differential speed of the rollers 20, 22 and their different inclination.
  • the trajectory of the sheet is better understood if we first consider the trajectory of the interior corner of the sheet adjacent to the stop 16. This corner, A in FIG. 2, therefore moves on a trajectory T in s' moving away from the stop 16 by a value approximately twice the longitudinal path traveled at the same time, to arrive at a point A 'in FIG. 2. Simultaneously, the sheet is turned by an angle of 90 ° so that it is now presented in the longitudinal direction on the conveyor 12. It can therefore be seen that during the rotation of the sheet, it is sufficiently distant from the stop 16 to avoid any damage to its edge or its corners.
  • the two balls 24, 26 are raised to selectively pass sheets without rotation.
  • the device described is safe and reliable to operate despite its great simplicity. It does not require a sheet detector or adjustment to the format of the sheets. The rotation is even ensured when the sheets are not individualized, but stacked so that several sheets pass simultaneously over the rollers 20, 22.
  • the choice of the fictitious center of rotation C is determined by the differential inclination of the rollers 20, 22. By the choice of this center, it is easy to determine the value of clearance of the sheets relative to the stop 16. This is how it is possible to achieve, as required, even a fairly large offset in the alignment of the sheets downstream of the rollers 20, 22.

Abstract

The device comprises sheets on a roller conveyor (12), which has a longitudinal sheet alignment stop (16). The sheets are rotated by a pair of rollers (20,22). The roller (20) furthest from the stop is rotated at twice the speed of the other roller. The rotational axis of the roller furthest from the stop is inclined to the normal to the stop at an angle greater than that of the roller (22) nearest the stop. The roller rotational axes inclination cause disengagement of the sheets from the stop. Each roller has its periphery in contact with a rotating ball support (24,26) or with the lower face of a sheet during its passage. The conveyor rollers (14) are inclined to the normal to the stop so as to bring back the stop onto the sheets' lateral edge. They are supported on freely rotating balls (18) in a cylindrical guide at right angles to the roller ends near the stop.

Description

La présente invention concerne un dispositif de rotation de feuilles sur un convoyeur à rouleaux définissant un plan de transport et pourvu d'une butée longitudinale d'alignement des feuilles.The present invention relates to a device for rotating sheets on a roller conveyor defining a transport plane and provided with a longitudinal stop for aligning the sheets.

Les feuilles sortant à cadence rapide d'une machine de reproduction telle qu'une imprimante, peuvent se présenter dans l'une ou l'autre de deux orientations perpendiculaires. En vue d'une finition en livret, fascicule ou brochure, les feuilles sont amenées par un convoyeur à une machine de finition. Si la machine de finition est prévue pour traiter les feuilles dans une seule des deux orientations possibles, et si les feuilles amenées par le convoyeur se présentent dans l'autre des deux orientations, elles doivent être tournées dans leur plan d'un angle de 90°.The sheets emerging at a rapid rate from a reproduction machine such as a printer, can appear in one or the other of two perpendicular orientations. For finishing in booklet, booklet or brochure, the sheets are brought by a conveyor to a finishing machine. If the finishing machine is designed to process the sheets in only one of the two possible orientations, and if the sheets brought by the conveyor are in the other of the two orientations, they must be turned in their plane by an angle of 90 °.

La présente invention offre un dispositif de rotation de feuilles capable de les tourner dans leur plan d'un angle de 90° sans interruption ou ralentissement de leur mouvement sur le convoyeur, et sans risque d'endommagement.The present invention provides a device for rotating sheets capable of turning them in their plane by an angle of 90 ° without interrupting or slowing down their movement on the conveyor, and without risk of damage.

Suivant l'invention, le dispositif de rotation de feuilles est caractérisé en ce qu'il comporte une paire de galets entraînés en rotation à des vitesses différentes et espacés l'un de l'autre et de ladite butée transversalement par rapport à celle-ci, chacun desdits galets ayant son axe de rotation incliné par rapport à la normale sur ladite butée, d'un angle déterminé qui est plus grand pour celui des galets qui est plus proche de ladite butée et dont la vitesse de rotation est la plus faible, et chacun desdits galets ayant sa périphérie en contact avec un élément rotatif d'appui, ou avec la face inférieure d'une feuille lors de son passage, sensiblement dans ledit plan de transport.According to the invention, the sheet rotation device is characterized in that it comprises a pair of rollers driven in rotation at different speeds and spaced from one another and from said stop transversely to the latter each of said rollers having its axis of rotation inclined relative to normal to said stop, by a determined angle which is greater for that of the rollers which is closer to said stop and whose rotation speed is the lowest, and each of said rollers having its periphery in contact with a rotary support element, or with the underside of a sheet during its passage, substantially in said transport plane.

Ainsi, par la vitesse différentielle des deux galets, les feuilles passant sur ceux-ci continuent leur trajectoire sur les rouleaux du convoyeur tout en étant freinée de manière contrôlée dans leur zone proche de la butée d'alignement, de telle sorte qu'elles sont tournées au fur et à mesure qu'elles passent sur les galets. Simultanément, par l'inclinaison des galets par rapport à la direction longitudinale sur le convoyeur, les feuilles sont éloignées de la butée d'alignement. Puisque le bord de chaque feuille est donc éloigné de la butée d'alignement lors de son passage sur les galets, le coin antérieur de la feuille proche de cette butée ne risque pas de se heurter contre celle-ci, et l'on évite tout risque d'endommagement de la feuille.Thus, by the differential speed of the two rollers, the sheets passing over them continue their trajectory on the conveyor rollers while being braked in a controlled manner in their area close to the alignment stop, so that they are turned as they pass over the rollers. Simultaneously, by the inclination of the rollers relative to the longitudinal direction on the conveyor, the sheets are moved away from the alignment stop. Since the edge of each sheet is therefore far from the alignment stop when it passes over the rollers, the front corner of the sheet close to this stop is not likely to collide against it, and any risk of damaging the sheet.

De préférence, on utilise un convoyeur à rouleaux effectuant automatiquement une correction d'un défaut de registration des feuilles reçues.Preferably, a roller conveyor is used which automatically corrects a registration defect in the sheets received.

Cette correction résulte d'une inclinaison des rouleaux du convoyeur par rapport à la normale sur la butée d'alignement, dans un sens tel que les feuilles sont déplacées vers cette butée lorsqu'elles passent sur les rouleaux. Les feuilles arrivent donc parfaitement alignées devant les deux galets, et sont ensuite éloignées de la butée pendant la phase de rotation. Toutefois, lorsque les feuilles quittent la zone de contact avec les galets, elles sont de nouveau déplacées en direction de la butée longitudinale et sont correctement alignées lorsqu'elles sortent du convoyeur après rotation de 90°.This correction results from an inclination of the conveyor rollers relative to normal on the alignment stop, in a direction such that the sheets are moved towards this stop when they pass over the rollers. The sheets therefore arrive perfectly aligned in front of the two rollers, and are then moved away from the stop during the rotation phase. However, when the sheets leave the zone of contact with the rollers, they are again displaced in the direction of the longitudinal stop and are correctly aligned when they leave the conveyor after rotation of 90 °.

Dans une réalisation préférée du dispositif, le rapport des vitesses de rotation des galets est de 1 : 2, et la vitesse de rotation de celui des galets qui est plus éloigné de la butée est déterminée de manière à présenter parallèllement à la butée, une composante qui est égale à celle des rouleaux du convoyeur. Ainsi, le transport des feuilles sur le convoyeur n'est pas perturbé par la phase de rotation. La synchronisation de la rotation des galets avec celle du rouleau du convoyeur est automatiquement assurée par un mécanisme commun d'entraînement.In a preferred embodiment of the device, the rotation speed ratio of the rollers is 1: 2, and the rotation speed of that of the rollers which is further from the stop is determined so as to present, parallel to the stop, a component which is equal to that of the conveyor rollers. Thus, the transport of the sheets on the conveyor is not disturbed by the rotation phase. The synchronization of the rotation of the rollers with that of the conveyor roller is automatically ensured by a common drive mechanism.

D'autres détails et particularités de l'invention ressortiront de la description suivante d'une forme de réalisation préférée du dispositif, en reférence aux dessins annexés dans lesquels:

  • la figure 1 est une vue schématique en plan d'un convoyeur à rouleaux dans lequel un dispositif de rotation de feuilles est intégré;
  • la figure 2 est une vue en plan schématique du dispositif de rotation à plus grande échelle;
  • la figure 3 est une vue schématique en plan d'un mécanisme d'entraînement;
  • la figure 4 est une vue en élévation du mécanisme d'entraînement; et
  • la figure 5 est une vue schématique en élévation du dispositif de rotation.
Other details and particularities of the invention will emerge from the following description of a preferred embodiment of the device, with reference to the accompanying drawings in which:
  • Figure 1 is a schematic plan view of a roller conveyor in which a sheet rotation device is integrated;
  • Figure 2 is a schematic plan view of the rotation device on a larger scale;
  • Figure 3 is a schematic plan view of a drive mechanism;
  • Figure 4 is an elevational view of the drive mechanism; and
  • Figure 5 is a schematic elevational view of the rotation device.

Dans la forme de réalisation représentée, un dispositif de rotation de feuilles, globalement repéré par 10, est intégré dans un convoyeur horizontal 12 doté d'une série de rouleaux parallèlles 14. D'un côté longitudinal, le convoyeur 12 présente une butée 16 d'alignement des feuilles. Les rouleaux 14 sont inclinés par rapport à la normale à la butée 16 d'un angle α qui est de l'ordre de 10°, dans un sens tel que les feuilles F passant sur les rouleaux 14 sont en permanence sollicitées en direction de la butée 16. Les rouleaux 14 qui sont entraînés en rotation par un mécanisme qui sera décrit ultérieurement en reférence aux figures 3 et 4, coopèrent chacun avec une bille d'appui 18 montée à rotation libre dans un élément de guidage cylindrique au droit de chaque extrémité de rouleaux voisine de la butée 16.In the embodiment shown, a sheet rotation device, generally identified by 10, is integrated in a horizontal conveyor 12 provided with a series of parallel rollers 14. On a longitudinal side, the conveyor 12 has a stop 16 sheet alignment. The rollers 14 are inclined relative to the normal to the stop 16 by an angle α which is of the order of 10 °, in a direction such that the sheets F passing over the rollers 14 are permanently biased towards the stop 16. The rollers 14 which are driven in rotation by a mechanism which will be described later with reference to FIGS. 3 and 4, each cooperate with a support ball 18 mounted with free rotation in a cylindrical guide element in line with each end of rollers close to the stop 16.

Le dispositif de rotation 10 est essentiellement constitué d'une paire de galets 20, 22 espacés l'un de l'autre et de la butée 16 perpendiculairement à celle-ci. Le galet 20 plus éloigné de la butée 16 que le galet 22, est entraîné en rotation à une vitesse double de celle du galet 22. Comme il ressort plus clairement de la figure 2, les axes de rotation des galets 20,22 sont inclinés par rapport à la normale à la butée 16 d'un angle β et γ, respectivement, plus grand pour le galet 22 qui est plus proche de la butée 16. En fait, l'inclinaison des axes de rotation des galets 20, 22 est telle que ces axes se coupent dans un centre fictif de rotation C des feuilles.The rotation device 10 essentially consists of a pair of rollers 20, 22 spaced from one another and of the stop 16 perpendicular thereto. The roller 20 further from the stop 16 than the roller 22, is rotated at a speed twice that of the roller 22. As is more clearly seen in Figure 2, the axes of rotation of the rollers 20,22 are inclined by compared to normal to the stop 16 by an angle β and γ, respectively, greater for the roller 22 which is closer to the stop 16. In fact, the inclination of the axes of rotation of the rollers 20, 22 is such that these axes intersect in a fictitious center of rotation C of the leaves.

Comme il ressort des figures 2 et 5, un élément d'appui sous forme d'une bille 24, 26 est associé aux galets 20, 22, respectivement. Les billes 24, 26 sont montées à rotation libre dans des éléments de guidage cylindriques 28, 30 fixés sur un bras pivotant 32 dont l'axe de pivotement 34 se trouve à une extrémité du bras 32. Les guides 28,30 présentent chacun une ouverture dans leur fond, laissant passer la surface des billes 24, 26 pour qu'elles entrent en contact avec la périphérie du galet 20, 22 associé. Le contact entre les galets 20, 22 et les billes 24, 26 se fait au niveau du plan de transport P des feuilles, défini par la face supérieure des rouleaux 14.As shown in Figures 2 and 5, a support element in the form of a ball 24, 26 is associated with the rollers 20, 22, respectively. The balls 24, 26 are mounted for free rotation in cylindrical guide elements 28, 30 fixed on a pivoting arm 32 whose pivot axis 34 is at one end of the arm 32. The guides 28.30 each have an opening in their bottom, allowing the surface of the balls 24, 26 to pass so that they come into contact with the periphery of the associated roller 20, 22. The contact between the rollers 20, 22 and the balls 24, 26 takes place at the level of the sheet transport plane P, defined by the upper face of the rollers 14.

Comme il ressort des figures 3 et 4, un mécanisme d'entraînement commun est prévu pour les rouleaux 14 et les galets 20, 22. Ce mécanisme comporte un arbre de distribution 40 portant à une de ses extrémités une poulie 42 entraînée en rotation par l'intermédiaire d'une courroie 44 à partir d'une source non-représentée. Cette source peut être un moteur d'entraînement du convoyeur 12 ou une prise de force sur une machine quelconque à laquelle le convoyeur est associé, par exemple une machine de finition. L'arbre de distribution 40 porte deux autres poulies, 46, 48 dont la première commande, par l'intermédiaire d'une courroie 50, le mouvement d'une courroie large 52 traînée sur un système de galet-tendeur 54 a, b, c et d, et engageant à frottement la face inférieure des rouleaux 14. L'autre poulie 48 commande, à travers une courroie 56, la rotation d'un arbre d'entraînement 58 qui présente, à chacune de ses extrémités, une gorge 60, 62 dans laquelle une courroie 64 et 66, respectivement, est engagée. Le diamètre de la gorge 60 est le double de celui de la gorge 62. Finalement, commme il ressort de la figure 3, les galets 20 et 22 sont entraînés en rotation par l'intermédiaire des courroies 64 et 66, respectivement.As can be seen in FIGS. 3 and 4, a common drive mechanism is provided for the rollers 14 and the rollers 20, 22. This mechanism comprises a distribution shaft 40 carrying at one of its ends a pulley 42 driven in rotation by the 'through a belt 44 from a source not shown. This source can be a drive motor for the conveyor 12 or a power take-off on any machine with which the conveyor is associated, for example a finishing machine. The distribution shaft 40 carries two other pulleys, 46, 48, the first of which controls, by means of a belt 50, the movement of a wide belt 52 dragged on a tensioner roller system 54 a, b, c and d, and engaging frictionally the underside of the rollers 14. The other pulley 48 controls, through a belt 56, the rotation of a drive shaft 58 which has, at each of its ends, a groove 60 , 62 in which a belt 64 and 66, respectively, is engaged. The diameter of the groove 60 is twice that of the groove 62. Finally, as shown in FIG. 3, the rollers 20 and 22 are driven in rotation by means of the belts 64 and 66, respectively.

En fonctionnement, une feuille f se présente a l'entrée du convoyeur 12, typiquement transversalement à la butée 16 et avec un décalage B par rapport à celle-ci. La feuille f est reçue à une vitesse relativement élevée, de l'ordre d'un mètre par seconde ou davantage. Dès que la feuille f est engagée par les rouleaux 14, elle est soumise en permanence à une force de sollicitation vers la butée 16 due à l'inclinaison des rouleaux. Avant d'arriver aux galets 20, 22, la feuille se trouve donc correctement alignée par rapport à la butée 16.In operation, a sheet f is present at the entry of the conveyor 12, typically transversely to the stop 16 and with an offset B relative to the latter. The sheet f is received at a relatively high speed, on the order of one meter per second or more. As soon as the sheet f is engaged by the rollers 14, it is permanently subjected to a biasing force towards the stop 16 due to the inclination of the rollers. Before arriving at the rollers 20, 22, the sheet is therefore correctly aligned with respect to the stop 16.

Lorsqu'elle est engagée entre les galets 20, 22 et les billes 24, 26, la feuille commence un mouvement complexe de translation et de rotation. Ce mouvement est dû à la vitesse différentielle des galets 20, 22 et à leur inclinaison différente. La trajectoire de la feuille est mieux comprise si l'on considère tout d'abord la trajectoire du coin intérieur de la feuille voisin de la butée 16. Ce coin, A à la figure 2, se déplace donc sur une trajectoire T en s'éloignant de la butée 16 d'une valeur environ double du trajet longitudinal parcouru en même temps, pour arriver à un point A' à la figure 2. Simultanément, la feuille est tournée d'un angle de 90° de telle sorte qu'elle se présente maintenant dans le sens longitudinal sur le convoyeur 12. On voit donc que pendant la rotation de la feuille, elle est suffisamment éloignée de la butée 16 pour éviter tout endommagement de son bord ou de ses coins.When it is engaged between the rollers 20, 22 and the balls 24, 26, the sheet begins a complex movement of translation and rotation. This movement is due to the differential speed of the rollers 20, 22 and their different inclination. The trajectory of the sheet is better understood if we first consider the trajectory of the interior corner of the sheet adjacent to the stop 16. This corner, A in FIG. 2, therefore moves on a trajectory T in s' moving away from the stop 16 by a value approximately twice the longitudinal path traveled at the same time, to arrive at a point A 'in FIG. 2. Simultaneously, the sheet is turned by an angle of 90 ° so that it is now presented in the longitudinal direction on the conveyor 12. It can therefore be seen that during the rotation of the sheet, it is sufficiently distant from the stop 16 to avoid any damage to its edge or its corners.

Dès que la feuille est passée sur les galets 20, 22, elle est à nouveau soumise à la sollicitation vers la butée 16, dûe à l'inclinaison des rouleaux 14. Comme on le voit à la figure 1, les feuilles sortent du convoyeur 12 correctement alignées par rapport à la butée 16, mais tournées d'un angle de 90°.As soon as the sheet has passed over the rollers 20, 22, it is again subjected to the stress towards the stop 16, due to the inclination of the rollers 14. As can be seen in FIG. 1, the sheets come out of the conveyor 12 correctly aligned with respect to the stop 16, but turned at an angle of 90 °.

Pour faire passer sans rotation les feuilles sur le convoyeur 12, il suffit de soulever la bille 26 associée au galet 22, en pivotant le bras 32. La feuille reste alors prise entre le galet 20 et la bille 24, de telle sorte qu'elle est légèrement éloignée de la butée 16. Cet effet n'est nullement gênant puisque la feuille est aussitôt ramenée contre la butée 16 après passage sur les galets 20, 22.To pass the sheets on the conveyor 12 without rotation, it suffices to lift the ball 26 associated with the roller 22, by pivoting the arm 32. The sheet then remains caught between the roller 20 and the ball 24, so that it is slightly away from the stop 16. This effect is in no way annoying since the sheet is immediately brought back against the stop 16 after passing over the rollers 20, 22.

Alternativement, les deux billes 24, 26 sont soulevées pour sélectivement faire passer des feuilles sans rotation.Alternatively, the two balls 24, 26 are raised to selectively pass sheets without rotation.

Le dispositif décrit est d'un fonctionement sûr et fiable malgré sa grande simplicité. Il ne nécessite ni détecteur de feuille, ni ajustage sur le format des feuilles. La rotation est même assurée lorsque les feuilles ne sont pas individualisées, mais empilées de telle sorte que plusieurs feuilles passent simultanément sur les galets 20, 22.The device described is safe and reliable to operate despite its great simplicity. It does not require a sheet detector or adjustment to the format of the sheets. The rotation is even ensured when the sheets are not individualized, but stacked so that several sheets pass simultaneously over the rollers 20, 22.

Le choix du centre fictif de rotation C est détérminé par l'inclinaison differentielle der galets 20, 22. Par le choix de ce centre, on détermine aisément la valeur de dégagement des feuilles par rapport à la butée 16. C'est ainsi qu'on peut réaliser, selon les besoins, un décalage même assez important de l'alignement des feuilles en aval des galets 20, 22.The choice of the fictitious center of rotation C is determined by the differential inclination of the rollers 20, 22. By the choice of this center, it is easy to determine the value of clearance of the sheets relative to the stop 16. This is how it is possible to achieve, as required, even a fairly large offset in the alignment of the sheets downstream of the rollers 20, 22.

Claims (10)

Dispositif de rotation de feuilles sur un convoyeur (12) à rouleaux (14) définissant un plan de transport (P) et pourvu d'une butéé (16) longitudinale d'alignement des feuilles, caractérisé en ce qu'il comporte une paire de galets (20, 22) entraînés en rotation à des vitesses différentes et espacés l'un de l'autre et de ladite butée (16) transversalement par rapport à celle-ci, chacun desdits galets (20, 22) ayant son axe de rotation incliné par rapport à la normale sur ladite butée (16), d'un angle (β) déterminé qui est plus grand pour celui (20) des galets qui est plus proche de ladite butée (16) et dont la vitesse de rotation est la plus faible, et chacun desdits galets (20, 22) ayant sa périphérie en contact avec un élément rotatif d'appui (24, 26), ou avec la face inférieure d'une feuille lors de son passage, sensiblement dans ledit plan (P) de transport.Sheet rotation device on a roller conveyor (12) defining a transport plane (P) and provided with a longitudinal stop (16) for aligning the sheets, characterized in that it comprises a pair of rollers (20, 22) rotated at different speeds and spaced from each other and from said stop (16) transversely relative thereto, each of said rollers (20, 22) having its axis of rotation inclined relative to normal on said stop (16), by a determined angle (β) which is greater for that (20) of the rollers which is closer to said stop (16) and whose speed of rotation is the weaker, and each of said rollers (20, 22) having its periphery in contact with a rotary support element (24, 26), or with the underside of a sheet during its passage, substantially in said plane (P ) transport. Dispositif suivant la revendication 1, caractérisé en ce que les axes de rotation desdits galets (20, 22) sont inclinés dans un sens provoquant un dégagement des feuilles de ladite butée (16).Device according to claim 1, characterized in that the axes of rotation of said rollers (20, 22) are inclined in a direction causing disengagement of the sheets from said stop (16). Dispositif suivant l'une ou l'autre des revendications 1 et 2, caractérisé en ce que les rouleaux (14) dudit convoyeur (12) sont inclinés par rapport à la normale sur ladite butée (16) de manière à ramener vers cette butée un bord latéral des feuilles.Device according to either of Claims 1 and 2, characterized in that the rollers (14) of the said conveyor (12) are inclined with respect to the normal on the said stop (16) so as to bring towards this stop a lateral edge of the leaves. Dispositif suivant l'une quelconque des revendications précédentes, caractérisé en ce que le rapport des vitesses de rotation desdits galets (20, 22) est de 1 : 2.Device according to any one of the preceding claims, characterized in that the ratio of the rotational speeds of said rollers (20, 22) is 1: 2. Dispositif suivant l'une quelconque des revendications précédentes, caractérisé en ce que les axes de rotation desdits galets (20, 22) se coupent sensiblement au centre fictif de rotation (C) des feuilles.Device according to any one of the preceding claims, characterized in that the axes of rotation of said rollers (20, 22) intersect substantially at the fictitious center of rotation (C) of the sheets. Dispositif suivant l'une quelconque des revendications précédentes, caractérisé en ce que la vitesse de rotation de celui (20) desdits galets qui est plus éloigné de ladite butée (16) est déterminée de manière à présenter parallèlement à ladite butée une composante (V1) qui est sensiblement égale à celle (V) des rouleaux (14) dudit convoyeur (12).Device according to any one of the preceding claims, characterized in that the speed of rotation of that (20) of said rollers which is further from said stop (16) is determined so as to present a component (V1) parallel to said stop which is substantially equal to that (V) of the rollers (14) of said conveyor (12). Dispositif suivant l'une quelconque des revendications précédentes, caractérisé en ce que ledit élément d'appui (24, 26) est constitué par une bille montée à rotation libre dans un guide vertical cylindrique (28, 30).Device according to any one of the preceding claims, characterized in that the said support element (24, 26) consists of a ball mounted with free rotation in a vertical cylindrical guide (28, 30). Dispositif suivant l'une quelconque des revendications précédentes, caractérisé en ce que l'élément d'appui de celui (22) desdits galets qui est plus proche de ladite butée (16) peut être sélectivement soulevé de manière à désactiver le dispositif.Device according to any one of the preceding claims, characterized in that the support element of the one (22) of said rollers which is closer to said stop (16) can be selectively lifted so as to deactivate the device. Dispositif suivant l'une quelconque des revendications précédentes, caractérisé en ce que chaque rouleau (14) dudit convoyeur (12) est associé à une bille d'appui (18) montée à rotation libre au voisinage de ladite butée (16).Device according to any one of the preceding claims, characterized in that each roller (14) of said conveyor (12) is associated with a support ball (18) mounted for free rotation in the vicinity of said stop (16). Dispositif suivant l'une quelconque des revendications précédentes, caractérisé en ce que les rouleaux (14) dudit convoyeur et lesdits galets (20, 22) sont entraînés en rotation de manière synchrone par un mécanisme commun d'entraînement.Device according to any one of the preceding claims, characterized in that the rollers (14) of the said conveyor and the said rollers (20, 22) are rotated synchronously by a common drive mechanism.
EP97102765A 1996-03-13 1997-02-20 Rotation device for rotating sheets on a roller conveyor Expired - Lifetime EP0795502B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9603164A FR2746084B1 (en) 1996-03-13 1996-03-13 DEVICE FOR ROTATING SHEETS ON A ROLLER CONVEYOR
FR9603164 1996-03-13

Publications (2)

Publication Number Publication Date
EP0795502A1 true EP0795502A1 (en) 1997-09-17
EP0795502B1 EP0795502B1 (en) 2001-05-09

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EP97102765A Expired - Lifetime EP0795502B1 (en) 1996-03-13 1997-02-20 Rotation device for rotating sheets on a roller conveyor

Country Status (7)

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US (1) US5836439A (en)
EP (1) EP0795502B1 (en)
JP (1) JP3755959B2 (en)
BR (1) BR9701278A (en)
CA (1) CA2198138C (en)
DE (1) DE69704735T2 (en)
FR (1) FR2746084B1 (en)

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US6702280B2 (en) 2001-07-30 2004-03-09 Heidelberger Druckmaschinen Ag Apparatus and process for transporting sheet-shaped print materials
US8875868B2 (en) 2010-08-06 2014-11-04 Ferag Ag Apparatus for aligning a sheet product
CN105236113A (en) * 2015-10-22 2016-01-13 武汉晟华元玻璃科技有限公司 Automatic steering device and method for glass edge grinding
CN112978325A (en) * 2021-04-27 2021-06-18 山东鲁丽家居有限公司 Rotary conveying device of edge bonding machine

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US7182010B2 (en) 2001-07-30 2007-02-27 Heidelberger Druckmaschinen Ag Apparatus and process for producing different hole patterns in sheet-shaped print materials
US7766325B2 (en) 2004-06-16 2010-08-03 Hewlett-Packard Indigo B.V. Paper rotation method and apparatus
US7111722B2 (en) * 2004-08-13 2006-09-26 Laitram, L.L.C. Angled-roller belt conveyor
US7007792B1 (en) 2005-03-08 2006-03-07 Laitram, L.L.C. Angled-roller article-rotating belt conveyor
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US7636543B2 (en) * 2005-11-30 2009-12-22 Xerox Corporation Radial merge module for printing system
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US8584832B2 (en) * 2009-12-07 2013-11-19 Pitney Bowes Inc. System and method for mailpiece skew correction
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US11142407B2 (en) * 2019-03-22 2021-10-12 Fives Intralogistics Corp Conveyor with jam prevention diverter wheels
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Cited By (7)

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Publication number Priority date Publication date Assignee Title
US6702280B2 (en) 2001-07-30 2004-03-09 Heidelberger Druckmaschinen Ag Apparatus and process for transporting sheet-shaped print materials
DE10147485A1 (en) * 2001-09-26 2003-04-17 Heidelberger Druckmasch Ag Arrangement for transporting sheet print material has coupling mechanism between contact elements with which transport can be changed over for sheet alignment or no sheet alignment
US8875868B2 (en) 2010-08-06 2014-11-04 Ferag Ag Apparatus for aligning a sheet product
CN105236113A (en) * 2015-10-22 2016-01-13 武汉晟华元玻璃科技有限公司 Automatic steering device and method for glass edge grinding
CN105236113B (en) * 2015-10-22 2017-09-29 武汉晟华元玻璃科技有限公司 A kind of glass edging autosteerer and forward method
CN112978325A (en) * 2021-04-27 2021-06-18 山东鲁丽家居有限公司 Rotary conveying device of edge bonding machine
CN112978325B (en) * 2021-04-27 2021-09-28 山东鲁丽家居有限公司 Rotary conveying device of edge bonding machine

Also Published As

Publication number Publication date
BR9701278A (en) 1998-11-10
JPH1045280A (en) 1998-02-17
DE69704735T2 (en) 2002-02-07
FR2746084A1 (en) 1997-09-19
FR2746084B1 (en) 1998-05-07
EP0795502B1 (en) 2001-05-09
JP3755959B2 (en) 2006-03-15
US5836439A (en) 1998-11-17
DE69704735D1 (en) 2001-06-13
CA2198138C (en) 2004-11-09
CA2198138A1 (en) 1997-09-14

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