EP0021398B1 - Turnover device for sheets - Google Patents

Turnover device for sheets Download PDF

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Publication number
EP0021398B1
EP0021398B1 EP80103539A EP80103539A EP0021398B1 EP 0021398 B1 EP0021398 B1 EP 0021398B1 EP 80103539 A EP80103539 A EP 80103539A EP 80103539 A EP80103539 A EP 80103539A EP 0021398 B1 EP0021398 B1 EP 0021398B1
Authority
EP
European Patent Office
Prior art keywords
sheet
turning over
turning
notch
over element
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
Application number
EP80103539A
Other languages
German (de)
French (fr)
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EP0021398A1 (en
Inventor
Stephen Pope Garrison
Elmer Leroy Bob Kroeker
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.)
International Business Machines Corp
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International Business Machines Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of EP0021398A1 publication Critical patent/EP0021398A1/en
Application granted granted Critical
Publication of EP0021398B1 publication Critical patent/EP0021398B1/en
Expired legal-status Critical Current

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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
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/38—Delivering or advancing articles from machines; Advancing articles to or into piles by movable piling or advancing arms, frames, plates, or like members with which the articles are maintained in face contact
    • B65H29/40—Members rotated about an axis perpendicular to direction of article movement, e.g. star-wheels formed by S-shaped members
    • 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
    • B65H2301/421—Forming a pile
    • B65H2301/4212—Forming a pile of articles substantially horizontal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/60—Other elements in face contact with handled material
    • B65H2404/65—Other elements in face contact with handled material rotating around an axis parallel to face of material and perpendicular to transport direction, e.g. star wheel
    • B65H2404/652—Other elements in face contact with handled material rotating around an axis parallel to face of material and perpendicular to transport direction, e.g. star wheel having two elements diametrically opposed

Definitions

  • the present invention makes it possible to produce a simple and effective sheet turning device comprising a rotary turning element of generally cylindrical shape, comprising at least two notches whose mouths are diametrically opposite on the periphery of said turning element, drive means for rotating said turning element, sheet retaining means capable of jamming the sheets in said notches, and control means for actuating said retaining means after the front board of a sheet to be turned has been inserted into a first notch and for releasing said retaining means after the turning element has made a rotation of approximately 180 °.
  • the sheet 14 arrives via the feed path 15 and is gripped between the drive roller 4 and the guide roller 5.
  • the turning rollers 6 are arranged at A and the drive roller 4 drives the sheet 14 in the slot 18 with a flared opening, formed in the turning rollers 6.
  • the roller 4 continues to push the sheet 14, which causes the rollers to rotate turning 6 in position B.
  • the feed roller 7 urges their outer surface via the sheet 14. The feed roller 7 rotates the rollers of turning 6 and the sheet 14 to position C.

Description

Domaine techniqueTechnical area

La présente invention concerne d'une manière générale les dispositifs d'alimentation de feuilles et plus particulièrement, un dispositif alimentant, positionnant et retournant des documents d'un côté sur l'autre.The present invention relates generally to sheet feeding devices and more particularly, a device feeding, positioning and turning documents from one side to the other.

Etat de la technique antérieureState of the prior art

On connaît déjà dans l'art antérieur divers types de dispositifs permettant de retourner des articles plats tels que des feuilles d'un côté sur l'autre. La plupart font appel à des systèmes mécaniques compliqués et nécessitent des réglages très précis, ce qui conduit à des appareils encombrants, d'une fiabilité médiocre ou d'un coût élevé. On citera à titre d'exemple le dispositif décrit dans le document DE-A-1 806 631. Ce dispositif comprend essentiellement un élément rotatif de retournement, de forme générale cylindrique, muni de plusieurs fentes radiales dans lesquelles sont insérées les feuilles à retourner, des moyens d'entraînement pour faire tourner cet élément de retournement, des moyens de retenue des feuilles et des moyens de commande permettant d'actionner les moyens de retenue de façon à ce qu'ils maintiennent les feuilles coincées dans les fentes pendant les opérations de retournement et qu'ils les libérent une fois le retournement voulu effectué. Les moyens de retenue sont constitués par un organe rotatif monté sur l'axe de l'élément de retournement et comportant des fourchettes, disposées radialement, dont le nombre est égal à celui des fentes de l'élément de retournement. L'action appropriée de ces fourchettes est obtenue par un jeu de ressorts et de cames actionnés en fonction de la position angulaire de l'élément de retournement.Various types of device are already known in the prior art for turning flat articles such as sheets from one side to the other. Most use complicated mechanical systems and require very precise adjustments, which leads to bulky devices, of poor reliability or of high cost. By way of example, the device described in document DE-A-1 806 631 may be cited. This device essentially comprises a rotary turning element, of generally cylindrical shape, provided with several radial slots in which the sheets to be turned are inserted, drive means for rotating this turning element, sheet retaining means and control means making it possible to actuate the retaining means so that they keep the sheets jammed in the slots during the operations of and release them when the desired turnaround is made. The retaining means are constituted by a rotary member mounted on the axis of the turning element and comprising forks, arranged radially, the number of which is equal to that of the slots of the turning element. The appropriate action of these forks is obtained by a set of springs and cams actuated as a function of the angular position of the turning element.

Exposé de l'inventionStatement of the invention

La présente invention permet de réaliser un dispositif simple et efficace de retournement de feuille comprenant un élément de retournement rotatif de forme générale cylindrique, comportant au moins deux encoches dont les embouchures sont diamètralement opposées sur la périphérie dudit élément de retournement, des moyens d'entraînement pour faire tourner ledit élément de retournement, des moyens de retenue de feuilles susceptibles de venir coincer les feuilles dans lesdites encoches, et des moyens de commande pour actionner lesdits moyens de retenue après que le board avant d'une feuille à retourner a été introduit dans une première encoche et pour relâcher lesdits moyens de retenue après que l'élément de retournement a effectué une rotation d'environ 180°. Lesdites encoches sont disposées dans des plans parallèles à l'axe de rotation dudit élément de retournement, au voisinage immédiat de la périphérie de ce dernier, et des moyens de transport de feuilles sont prévus pour amener le board avant de la feuille à retourner sensiblement tangentiellement à la périphérie dudit élément de retournement de façon à ce que ledit bord avant pénètre dans ladite première encoche dans un sens correspondant au sens de rotation de cet élément. Lesdits moyens de retenue sont constitués par au moins un organe coulissant monté solidaire en rotation avec ledit élément de retournement mais susceptible de coulisser radialement entre une première position dans laquelle une de ses extrémités vient coincer la feuille à retourner contre une paroi de ladite première encoche tandis que son extrémité opposée est dégagée de ladite seconde encoche de façon à libérer la feuille retournée qui y était éventuellement coincée pendant une partie au moins de l'operation de retournement, et une seconde position symétrique de la première par rapport à l'axe dudit élément de retournement, où il agit en sens inverse. Lesdits moyens de commande sont agencés de manière à exercer un effort selon une direction fixe sur lesdits moyens de retenue de façon que ceux-ci coulissent dans un sens ou dans l'autre selon leur position en rotation et donc retiennent ou non le bord d'une feuille dans l'encoche correspondante. Des moyens de réception de feuilles sont également prévus pour recevoir la feuille retournée après rotation de 180° dudit élément de retournement.The present invention makes it possible to produce a simple and effective sheet turning device comprising a rotary turning element of generally cylindrical shape, comprising at least two notches whose mouths are diametrically opposite on the periphery of said turning element, drive means for rotating said turning element, sheet retaining means capable of jamming the sheets in said notches, and control means for actuating said retaining means after the front board of a sheet to be turned has been inserted into a first notch and for releasing said retaining means after the turning element has made a rotation of approximately 180 °. Said notches are arranged in planes parallel to the axis of rotation of said turning element, in the immediate vicinity of the periphery of the latter, and sheet transport means are provided for causing the board before the sheet to be turned substantially tangentially at the periphery of said turning element so that said front edge enters said first notch in a direction corresponding to the direction of rotation of this element. Said retaining means consist of at least one sliding member mounted to rotate with said turning element but capable of sliding radially between a first position in which one of its ends jams the sheet to be turned against a wall of said first notch while that its opposite end is released from said second notch so as to release the inverted sheet which was possibly jammed therein during at least part of the inversion operation, and a second position symmetrical with the first with respect to the axis of said element of reversal, where it acts in the opposite direction. Said control means are arranged so as to exert a force in a fixed direction on said retaining means so that they slide in one direction or the other according to their rotational position and therefore retain or not the edge of a sheet in the corresponding notch. Sheet receiving means are also provided for receiving the sheet turned over after 180 ° rotation of said turning element.

D'autres caractéristiques et avantages de la présente invention ressortiront mieux de l'exposé qui suit, fait en référence aux dessins annexés à ce texte, qui représentent un mode de réalisation préféré de celle-ci.Other characteristics and advantages of the present invention will emerge more clearly from the following description, made with reference to the drawings appended to this text, which represent a preferred embodiment of the latter.

Brève description des figuresBrief description of the figures

La Figure 1 est une vue de côté schématique du dispositif de retournement de feuilles de la présente invention ainsi que des chemins et des rouleaux d'alimentation et du bac de sortie associé.Figure 1 is a schematic side view of the sheet turning device of the present invention as well as feed paths and rollers and the associated output bin.

La Figure 2 est une vue schématique de l'avant du dispositif de retournement de feuilles de la présente invention.Figure 2 is a schematic view of the front of the sheet turning device of the present invention.

Description de l'inventionDescription of the invention

Les Figures 1 et 2 sont des représentations schématiques de la réalisation préférée du dispositif de la présente invention. Un chemin d'alimentation des feuilles 15 reçoit une feuille à retourner depuis la sortie d'un dispositif d'impression ou d'une machine de reproduction non représentée. Le chemin d'alimentation 15 peut être réalisé en une toile métallique ou en un matériau rigide, par example en tôle ou en matière plastique. La feuille à retourner arrive par le côté gauche du chemin d'alimentation 15 et est sollicitée par le rouleau d'entraînement 4 et le rouleau de guidage 5 qui peuvent être des rouleaux cylindriques continus de longueur égale ou inférieure à la largeur du chemin 15. Bien que dans la réalisation préférée le rouleau d'entraînement 4 et le rouleau de guidage 5 soient des rouleaux simples, ceux-ci pourraient être des rouleaux cylindriques multiples montés les uns à la suite des autres mais séparés par un certain intervalle, sur un arbre disposé sur toute la largeur du chemin d'alimentation 15. Le rouleau d'entraînement 4 est monté coaxiale- ment avec le pignon 9 sur l'arbre 25. La force entraînant le rouleau 4 est appliquée à l'arbre 25 par le pignon 9 lui-même entraîné par l'unité de commande principale 16 qui peut consister un un pignon monté sur l'arbre d'un moteur électrique, ou le pignon 9 peut être entraîné par tour autre dispositif d'entraînement du système non représenté sur la figure.Figures 1 and 2 are schematic representations of the preferred embodiment of the device of the present invention. A sheet feeding path 15 receives a sheet to be returned from the output of a printing device or a reproduction machine not shown. The feed path 15 can be made of a metallic fabric or a rigid material, for example sheet metal or plastic. The sheet to be turned over arrives from the left side of the feed path 15 and is stressed by the drive roller 4 and the guide roller 5 which may be continuous cylindrical rollers of length equal to or less than the width of the path 15. Although in the preferred embodiment the drive roller 4 and the guide roller 5 are single rollers, these could be multiple cylindrical rollers mounted one after the other but separated by a certain interval, on a shaft arranged over the entire width of the feed path 15. The drive roller 4 is mounted coaxially with the pinion 9 on the shaft 25. The force driving the roller 4 is applied to the shaft 25 by the pinion 9 itself driven by the main control unit 16 which may consist of a pinion mounted on the shaft of an electric motor, or the pinion 9 can be driven by turn other device drive system not shown in the figure.

Le rouleau de guidage 5 est rappelé contre le rouleau d'entraînement 4 par le ressort 17 dont une extrémité est fixée au bras portant l'arbre sur lequel est monté le rouleau de guidage 5. Ce bras porte-rouleau de guidage est monté pivotant en 26. Le rouleau d'entraînement 4 en association avec le rouleau de guidage 5 assure l'entraînement des feuilles dans le rouleau de retournement 6.The guide roller 5 is biased against the drive roller 4 by the spring 17, one end of which is fixed to the arm carrying the shaft on which the guide roller is mounted 5. This guide roller support arm is pivotally mounted in 26. The drive roller 4 in combination with the guide roller 5 drives the sheets into the turning roller 6.

Le rouleau de retournement 6 est composé d'un certain nombre de rouleaux cylindriques montés les uns à la suite des autres mais séparés par un certain intervalle, sur un arbre. Chaque rouleau de retournement 6 présente deux fentes 18, 18' à entrée évasée et séparées de 180° sur la périphérie dudit rouleau de retournement dans lequel le bord des feuilles à retourner est engagé. L'entrée évasée de chacune des fentes 18, 18' présente un côté plus ouvert 23, 23' qui fait fonction de surface de guidage du bord de la feuille pénétrant dans la fente. Les fentes 18, 18' à ouverture évasée sont usinées dans la masse des rouleaux de retournement 6, de façon que la force appliquée contre leur extrémité fermée 19, 19' par la feuille engagée ait le même effet qu'une force tangentielle appliquée à la surface des rouleaux de retournement 6 pour amorcer leur rotation. Les rouleaux de retournement 6 sont fixés à un arbre qui tourne librement et ils occupent normalement la position A. L'arbre peut aussi être monté en position fixe et les rouleaux tourner librement sur l'arbre.The turning roller 6 is composed of a number of cylindrical rollers mounted one after the other but separated by a certain interval, on a shaft. Each turning roller 6 has two slots 18, 18 ′ with flared entry and separated by 180 ° on the periphery of said turning roller in which the edge of the sheets to be turned is engaged. The flared entry of each of the slots 18, 18 'has a more open side 23, 23' which acts as a guide surface for the edge of the sheet penetrating the slot. The slots 18, 18 'with flared opening are machined in the mass of the turning rollers 6, so that the force applied against their closed end 19, 19' by the engaged sheet has the same effect as a tangential force applied to the surface of the turning rollers 6 to start their rotation. The turning rollers 6 are fixed to a freely rotating shaft and they normally occupy position A. The shaft can also be mounted in a fixed position and the rollers rotate freely on the shaft.

Un rouleau d'alimentation 7 est monté sur un arbre dans une position adjacente aux rouleaux de retournement 6 et est porté par un bras pivotant 8 qui tourne librement sur l'arbre 25 du rouleau d'entraînement. Le rouleau d'alimentation 7 est entraîné par le pignon 24 qui engrène avec le pignon 9 du rouleau d'entraînement. Le rapport d'engrenage du pignon de rouleau d'alimentation 24 et du pignon de rouleau d'entraînement 9 est choisi de façon que la vitesse périphérique du rouleau d'alimentation 7 soit égale ou légèrement inférieure à celle du rouleau d'entraînement 4. Le rouleau d'alimentation 7 est rappelé contre les rouleaux de retournement 6 par le ressort 17 et la butée excentrique 10 l'empêche de solliciter le côté évasé 23 des fentes 19 usinées dans les rouleaux de retournement. Dans la réalisation préférée, le rouleau d'alimentation 7 consiste en un seul rouleau cylindrique d'une longueur permettant la sollicitation de tous les rouleaux de retournement 6. Cependant, les rouleaux d'alimentation 7 pourraient être composés de plusieurs rouleaux montés les uns à la suite des autres et adjacents aux rouleaux de retournement 6.A feed roller 7 is mounted on a shaft in a position adjacent to the turning rollers 6 and is carried by a pivoting arm 8 which rotates freely on the shaft 25 of the drive roller. The feed roller 7 is driven by the pinion 24 which meshes with the pinion 9 of the drive roller. The gear ratio of the feed roller pinion 24 and the drive roller pinion 9 is chosen so that the peripheral speed of the feed roller 7 is equal to or slightly lower than that of the drive roller 4. The feed roller 7 is biased against the turning rollers 6 by the spring 17 and the eccentric stop 10 prevents it from biasing the flared side 23 of the slots 19 machined in the turning rollers. In the preferred embodiment, the feed roller 7 consists of a single cylindrical roller of a length allowing the loading of all the turning rollers 6. However, the feed rollers 7 could be composed of several rollers mounted one at a time. following the others and adjacent to the turning rollers 6.

Un élément 11 de retenue du bord des feuilles introduites dans les fentes 18 est fixé à l'extrémité de chaque rouleau de retournement 6 et coulisse en étant guidé par les tétons 20 et 21. L'élément de retenue 11 présente des boutonnières allongées dans lesquelles sont logés les tétons 20 et 21 ainsi que l'arbre des rouleaux de retournement, et est mobile en translation jusqu'à ce que sa course soit stoppée par l'un des bords de chaque fente 18 opposés aux côtés évasés 23. Une lame flexible 12 est disposée de façon que son extrémité inclinée 12' porte contre la surface de guidage circulaire 22 faisant saillie sur chaque élément de retenue 11 et tende à faire coulisser l'élément de retenue dès que celui-ci a dépassé une position angulaire correspondant à l'angle de l'extrémité inclinée 12' de la lame 12 (position B). La lame flexible 12 fait également fonction de paroi avant du bac de sortie 13 et tend à dégager le bord de la feuille 14 de la fente 18 du rouleau de retournement une fois que le retournement a été exécuté.An element 11 for retaining the edge of the sheets introduced into the slots 18 is fixed to the end of each turning roller 6 and slides while being guided by the pins 20 and 21. The retaining element 11 has elongated buttonholes in which are housed the pins 20 and 21 as well as the shaft of the turning rollers, and is movable in translation until its race is stopped by one of the edges of each slot 18 opposite the flared sides 23. A flexible blade 12 is arranged so that its inclined end 12 'bears against the circular guide surface 22 projecting from each retaining element 11 and tends to slide the retaining element as soon as it has exceeded an angular position corresponding to the 'angle of the inclined end 12' of the blade 12 (position B). The flexible blade 12 also functions as the front wall of the output bin 13 and tends to disengage the edge of the sheet 14 from the slot 18 of the turning roller once the turning has been carried out.

En fonctionnement, la feuille 14 arrive par le chemin d'alimentation 15 et est saisie entre le rouleau d'entraînement 4 et le rouleau de guidage 5. Les rouleaux de retournement 6 sont disposés en A et le rouleau d'entraînement 4 entraîne la feuille 14 dans la fente 18 à ouverture évasée, ménagée dans les rouleaux de retournement 6. Lorsque le bord de la feuille 14 est engagé à fond dans la fente 18, le rouleau 4 continue de pousser la feuille 14, ce qui provoque la rotation des rouleaux de retournement 6 à la position B. Lorsque les rouleaux de retournement 6 atteignent la position B, le rouleau d'alimentation 7 sollicite leur surface extérieure par l'intermédiaire de la feuille 14. Le rouleau d'alimentation 7 entraîne en rotation les rouleaux de retournement 6 et la feuille 14 jusqu'à la position C. De plus, au-delà de la position B, l'élément de retenue 11 est bascule dans son autre position par la partie coudée 12' de la lame flexible 12 afin de bloquer le bord de la feuille 14 contre le bord rectiligne supérieur de la fente 18 afin d'y maintenir ladite feuille 14.In operation, the sheet 14 arrives via the feed path 15 and is gripped between the drive roller 4 and the guide roller 5. The turning rollers 6 are arranged at A and the drive roller 4 drives the sheet 14 in the slot 18 with a flared opening, formed in the turning rollers 6. When the edge of the sheet 14 is fully engaged in the slot 18, the roller 4 continues to push the sheet 14, which causes the rollers to rotate turning 6 in position B. When the turning rollers 6 reach position B, the feed roller 7 urges their outer surface via the sheet 14. The feed roller 7 rotates the rollers of turning 6 and the sheet 14 to position C. In addition, beyond position B, the retaining element 11 is tilted in its other position by the bent part 12 ′ of the flexible blade 12 in order to block the edge of the sheet 14 cont re the upper rectilinear edge of the slot 18 in order to maintain said sheet 14 therein.

Lorque les rouleaux de retournement 6 atteignent la position C, le rouleau d'alimentation 7 est dégagé de leur périphérie en raison du côté évasé 23 de la fente 18 qui arrive dans une position adjacente au rouleau d'alimentation 7 et la butée excentrique 10 interdit tout mouvement du bras 8. Les rouleaux de retournement 6 ne sont alors plus entraînés par le rouleau 7, mais le rouleau d'entraînement 4 continue de pousser la feuille 14 jusqu'à ce que le bord arrière de celle-ci ait dépassé ce rouleau. Le bord avant de la feuille 14 se trouve maintenant toujours retenu dans la fente 18 des rouleaux de retournement 6 tandis que le reste de la feuille repose sur la pile du bac de sortie 13.When the turning rollers 6 reach position C, the feed roller 7 is released from their periphery due to the flared side 23 of the slot 18 which arrives in a position adjacent to the feed roller 7 and the eccentric stop 10 prohibited any movement of the arm 8. The turning rollers 6 are then no longer driven by the roller 7, but the drive roller 4 continues to push the sheet 14 until the rear edge of the latter has exceeded this roller. The front edge of the sheet 14 is now always retained in the slot 18 of the turning rollers 6 while the rest of the sheet rests on the stack of the output tray 13.

Lorsque le rouleau d'entraînement 4 saisit le bord avant de la feuille suivante et l'engage dans la deuxième fente 18 et que les rouleaux de retournement commencent à tourner, l'extrémité 12' de la lame flexible 12 fait coulisser l'élément de retenue 11 dès que celui-ci a dépassé la position angulaire B pour bloquer la deuxième feuille dans la deuxième fente 18 et en même temps pour libérer la première feuille reposant sur le haut de la pile du bac de sortie 13. Simultanément, le board avant de la première feuille reposant sur le haut de la pile du bac de sortie 13 et qui se trouve toujours dans la première fente 18, porte contre la lame flexible 12, ce qui le dégage de ladite première fente 18. Cette opération est répétée pour chaque feuille à retourner arrivant par le chemin d'alimentation.When the drive roller 4 grasps the front edge of the next sheet and engages it in the second slot 18 and the turning rollers start to rotate, the end 12 ′ of the flexible blade 12 causes the element to slide. retainer 11 as soon as it has exceeded the angular position B to block the second sheet in the second slot 18 and at the same time to release the first sheet resting on the top of the stack of the output bin 13. Simultaneously, the front board of the first sheet resting on the top of the stack of the output bin 13 and which is still in the first slot 18, bears against the flexible blade 12, which releases it from said first slot 18. This operation is repeated for each sheet to be returned arriving by the feed path.

Bien que l'on ait décrit dans ce qui précède et représenté sur les dessins les caractéristiques essentielles de l'invention appliquées à un mode de réalisation préféré de celle-ci, il est évident que l'homme de l'art peut y apporter toutes modifications de forme ou de détail qu'il juge utiles, sans pour autant sortir du cadre de ladite invention tel que défini par les revendications.Although the essential characteristics of the invention applied to a preferred embodiment of the invention have been described in the foregoing and represented in the drawings, it is obvious that a person skilled in the art can provide all of them. modifications of form or detail which he judges useful, without departing from the scope of said invention as defined by the claims.

Claims (11)

1. Device for turning over sheets of paper of a type including:
a substantially cylindrical rotatable turning over element (6), including at least two notches (18, 18') the openings of which are diametrically opposite, each other on the periphery of said turning over element,
driving means (7) for rotating said turning over element,
sheet retainers (11) capable of operating to squeeze the sheets in said notches, and
control means (12', 12) for actuating said retainers after the front edge of a sheet to be turned over has been introduced into a first notch (18) and for releasing said retainers after the turning over element has rotated through about 180°,

characterized in that:
said notches are arranged in planes parallel to the axis of rotation of said turning over element, in the immediate vicinity of the periphery of the latter,
means for carrying the sheets (4, 5) are provided to bring the front edge of the sheet to be turned over approximately tangentially to the periphery of said turning over element in order that said front edge enters into said first notch (18) in a direction corresponding to the direction of rotation of this element,
said retainers include at least one sliding element (11) rotatably mounted integral with said turning over element but capable of sliding radially between a first position in which one of its extremities comes to squeeze the sheet to be turned over against an inner side of said first notch (18) whilst its opposite extremity is disengaged from said second notch (18') in order to release the sheet turned over which may have been squeezed there during at least a part of the turning over phase, and a second position symmetrical with the first in relation to the axis of said turning element, where it acts in the opposite direction.
said control means (12', 22) are arranged in such a way as to exert a force according to a fixed direction on the said retainers so that these slide in one direction or in the other according to their position in rotation and thus retain or not retain the edge of a sheet in the corresponding notch, and
means for receiving the sheets (13) are provided to receive the turned over sheet after a rotation through 180° of said turning element.
2. Device according to claim 1, characterized in that said means for carrying the sheets (4, 5) are arranged in such a way as to drive a sheet until, under the action of the force exerted by the front edge of the sheet on the back (19) of said first notch, said turning over element has rotated through an angle in relation to its resting position A bringing it into a predetermined angular position B, and ceasing to drive said sheet when said turning over element has reached said angular position B.
3. Device according to claim 2, characterized in that said driving means (7) are arranged in such a way as to rotate said turning over element after the latter has reached said predetermined angular position B, and to cease driving said turning over element (6) after a rotation of about 180° from its resting position A.
4. Device according to claim 3, characterized in that said means for carrying the sheets (4, 5) are coupled mechanically to said driving means (7).
5. device according to claim 4, characterized in that:
the notches of said turning over element (6) include a flared portion in the vicinity of their opening, forming recesses (23, 23'),
said carrying means include at least a first and a second drive roller (4, 5) said first roller
(5) being mounted on a first pivoting arm able to occupy a first position where said first and second rollers co-operate and drive a sheet by squeezing and a second position where said rollers no longer co-operate and thus no longer drive said sheet,
said driving means comprise at least one feed roller (7) mounted on a second pivoting arm (8), said second arm being able to occupy a first position where said feed roller (7) co-operates with the cylindrical peripheral part of said turning over element and a second position where said feed roller (7) faces one of said recesses (23, 23') and no longer co-operates with and thus no longer drives said turning over element.
6. Device according to claim 3, characterized in that said driving means (7) comprise a continuously rotating roller co-operating with an angular portion of the periphery of said turning over element (6) of a value of 1800 - α.
7. Device according to any one of the claims 2 to 6, characterized in that said retainers (11) and their control means (12', 22) are designed to operate and squeeze the sheet the front edge of which is in said first notch (18), when said turning over element (6) has gone beyond said predetermined position B under thrust exerted by said sheet, and to release a second sheet the front edge of which is in said second notch (18'), this second sheet being then released in order to land in a turned over position on said sheet receiving means (13).
8. Device according to any one of the preceding claims characterized in that said sliding element is mounted on one of the sidewalls of said turning over element (6) in order to slide along a diameter of this wall.
9. Device according to any one of the claims 2 to 8 characterized in that said control means (12', 22) are designed to make said sliding element tip from said second to said first position when said turning element (6) has gone beyond said predetermined position B, and to make it tip from said first to said second position when said turning over element has gone beyond the angular position opposite to said predetermined position B.
10. Device according to claim 9 characterized in that said means sheet receiving means (13) comprise a side-wall (12) against which at least a part of the front edge of the turned sheet strikes when said turning over element has turned through 180° after said predetermined position B, which has the effect of completely freeing the sheet from said first notch when said turning over element (6) continues its rotation, and to enable it to land in a turned over position on said receiving means (13).
11. Device according to claim 10 characterized in that:
the upper extremity of said side-wall (12) comprises a flexible part (12') making an angle with the angular direction of said resting position A, and
said sliding element (11) is mounted to slide on the axis of said turning over means (6) and includes a circular guidance surface (22) co-operating with said flexible part (12'), the pressure exerted by said part (12') on said guidance surface (22) enabling said element (11) to slide from said first to said second position and inversely each time that this latter has gone beyond the angular position B, to the nearest 180°.
EP80103539A 1979-06-29 1980-06-24 Turnover device for sheets Expired EP0021398B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/053,651 US4252309A (en) 1979-06-29 1979-06-29 Document sheet flipper
US53651 1979-06-29

Publications (2)

Publication Number Publication Date
EP0021398A1 EP0021398A1 (en) 1981-01-07
EP0021398B1 true EP0021398B1 (en) 1983-07-06

Family

ID=21985694

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80103539A Expired EP0021398B1 (en) 1979-06-29 1980-06-24 Turnover device for sheets

Country Status (6)

Country Link
US (1) US4252309A (en)
EP (1) EP0021398B1 (en)
JP (1) JPS567866A (en)
CA (1) CA1135734A (en)
DE (1) DE3064026D1 (en)
IT (1) IT1149968B (en)

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Also Published As

Publication number Publication date
IT1149968B (en) 1986-12-10
JPS567866A (en) 1981-01-27
US4252309A (en) 1981-02-24
CA1135734A (en) 1982-11-16
JPS572625B2 (en) 1982-01-18
EP0021398A1 (en) 1981-01-07
DE3064026D1 (en) 1983-08-11
IT8022506A0 (en) 1980-06-03

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