EP1522512A1 - Working station in a machine transforming plate-like elements - Google Patents

Working station in a machine transforming plate-like elements Download PDF

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Publication number
EP1522512A1
EP1522512A1 EP03405716A EP03405716A EP1522512A1 EP 1522512 A1 EP1522512 A1 EP 1522512A1 EP 03405716 A EP03405716 A EP 03405716A EP 03405716 A EP03405716 A EP 03405716A EP 1522512 A1 EP1522512 A1 EP 1522512A1
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EP
European Patent Office
Prior art keywords
bar
chains
frame
working tool
cam
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.)
Granted
Application number
EP03405716A
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German (de)
French (fr)
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EP1522512B1 (en
Inventor
Eric Pache
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bobst Mex SA
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Bobst SA
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Filing date
Publication date
Application filed by Bobst SA filed Critical Bobst SA
Priority to ES03405716T priority Critical patent/ES2259755T3/en
Priority to EP03405716A priority patent/EP1522512B1/en
Priority to AT03405716T priority patent/ATE319640T1/en
Priority to DE60303918T priority patent/DE60303918T2/en
Publication of EP1522512A1 publication Critical patent/EP1522512A1/en
Application granted granted Critical
Publication of EP1522512B1 publication Critical patent/EP1522512B1/en
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Expired - Lifetime 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
    • B65H29/02—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles
    • B65H29/04—Delivering or advancing articles from machines; Advancing articles to or into piles by mechanical grippers engaging the leading edge only of the articles the grippers being carried by endless chains or bands
    • B65H29/042—Intermediate conveyors, e.g. transferring devices
    • B65H29/044—Intermediate conveyors, e.g. transferring devices conveying through a machine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2402/00—Constructional details of the handling apparatus
    • B65H2402/30—Supports; Subassemblies; Mountings thereof
    • B65H2402/31—Pivoting support means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2403/00—Power transmission; Driving means
    • B65H2403/50—Driving mechanisms
    • B65H2403/51—Cam mechanisms
    • B65H2403/513—Cam mechanisms involving elongated cam, i.e. parallel to linear transport path
    • 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
    • B65H2404/30—Chains
    • B65H2404/34—Gripper bars bridging at least two chains running synchronously and parallely
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/42—Die-cutting

Definitions

  • the present invention relates to a station of work of a plate processing machine, for example a waste ejection station of a sheet cut by a platen press, comprising a frame, a work tool for example an ejection plate on which said sheet is to be laid, a bar of transverse pliers to grab the front edge of this sheet, two flexible training elements in the form of endless loops each secured to one end of said clip bar, means for guiding said elements flexible drive on said frame and means to bring said gripper bar closer to said work tool when this bar of pliers crosses the downstream end of this work tool.
  • the object of the present invention is to remedy the less in part, the disadvantages of the above-mentioned solutions.
  • the subject of the present invention is a workstation of an element processing machine in plates according to claim 1.
  • the terms "before” and “Backward” refer to the direction of travel F of the clamp bar. Since the invention relates specifically at the laying of treated leaves on the tool of work, preferably the ejection plate and not at the ejection proper, the ejection of the blanks and the means used for this ejection will neither be described nor represented in the description which follows. Otherwise, since the mechanism of the ejection device that will be described is symmetrical with respect to the longitudinal axis median of the platen press to which this ejection device is associated, this axis corresponding to the direction of transport F cut sheets, only one side of this workstation is represented by the drawing figures appended and will therefore be described in the description.
  • the workstation illustrated by Figures 1 to 3 has a frame 1, which we see only the part located on one side of the path of the leaves to be treated, a bar of tweezers 2 provided with tongs 3 to pinch the front edge of the leaves to be treated (not shown).
  • Each end of this clamp bar is connected to a chain 4 by two axes of articulation before 5 respectively rear 6, this chain 4, each attached to a connecting piece 7 which extends from the two sides of the drive chain 4.
  • These two axes 5, 6 are located at both ends of the drive chain 4 joined to each other by the connecting piece 7 forming an endless loop.
  • Each drive chain 4 is supported on a guide-chain 8 and passes on two chain wheels (not shown) conventionally in this type of machine.
  • the chains 4 on which a certain tension is exerted therefore tend to maintain the axes of articulation front 5 and back 6 in alignment with other links of these training chains 4, thus also serving as return means for holding the clamp bar 2 in a angular position determined with respect to the axes of articulation before 5 and back 6.
  • this guide-chain 8 presents, at the exit of the post at the place where the clip bar 2 is leaf on an ejection plate 9, a short down ramp 8a followed by an interruption over a certain length. At the end of the interruption, we find the guide-chain 8 which starts with a short ascending ramp 8b.
  • a cam 10 of descent of the clamp bar 2 is found in front of the interruption of the guide-chain 8.
  • This cam 10 is fixed to the frame 1 by screws 11.
  • the upper edge of this cam 10 is located under a protruding portion 1a of the frame 1 ( Figures 1 and 2).
  • a feeler wheel 12, integral with the clamp bar 2, is preferably located at each end of this bar 2.
  • This roller is disposed near the axis of articulation rear 6 of the drive chain 4, connecting the latter at link 7 and which is located at near the clamps 3 of the clamp bar 2 as well as that of the feeler roller 12.
  • the fixed cam 10 whose length is not limited by chain links of training, makes it possible to limit the accelerations communicated at the tweezers bar 2 during his movement tilting around the front axle 5.
  • This lengthening of the length of the stroke of the clamp bar 2 during which this clip bar is lowered adds to the fact that the distance between the articulation axes 5 and 6 connecting these drive chains 4 at the clip bar 2 is slightly greater than the length of a link in these chains 4, increasing the swing radius of the movable axis 6 around the fixed axis 5 resting on the guide-chain 8.
  • the means implemented to obtain this result are particularly simple, both from the point of view of manufacturing than the use of the machine. Ways used are significantly simpler than most proposed solutions to bring the cut leaves on the ejector plate.
  • the solution according to the present invention is just as simple but allows, on the other hand, to reduce the accelerations communicated to the clip bar, which is not possible when the length of the cam is limited by the interaxles linkages of the drive chains 4.

Abstract

The station has a frame, a work tool (9) on which a sheet is placed and a transversal clamp rod (2) for grasping the sheet`s front edge. A drive chain is connected to ends of the rod by its front and rear articulation axles (5, 6), and a feeler roller (12) is integrated with each end of the rod. The rod has a lowering cam (10) fixed to the frame by a screw and arranged on the roller to rotate clamps (3) of the rod around the axles.

Description

La présente invention se rapporte à un une station de travail d'une machine de transformation d'éléments en plaques, par exemple une station d'éjection des déchets d'une feuille découpée par une presse à platine, comprenant un bâti, un outil de travail par exemple une plaque d'éjection sur laquelle ladite feuille doit être posée, une barre de pinces transversale pour saisir le bord avant de cette feuille, deux éléments d'entraínement souples en forme de boucles sans fins solidaires chacun d'une extrémité de ladite barre de pinces, des moyens pour guider lesdits éléments d'entraínement souple sur ledit bâti et des moyens pour rapprocher ladite barre de pinces dudit outil de travail lorsque cette barre de pinces franchit l'extrémité aval de cet outil de travail.The present invention relates to a station of work of a plate processing machine, for example a waste ejection station of a sheet cut by a platen press, comprising a frame, a work tool for example an ejection plate on which said sheet is to be laid, a bar of transverse pliers to grab the front edge of this sheet, two flexible training elements in the form of endless loops each secured to one end of said clip bar, means for guiding said elements flexible drive on said frame and means to bring said gripper bar closer to said work tool when this bar of pliers crosses the downstream end of this work tool.

Plusieurs solutions ont déjà été proposées pour mettre les feuilles transportées par la barre de pinces en contact avec la plaque d'éjection. Parmi celles-ci on peut répartir les solutions proposées entre celles dans lesquelles la barre de pinces reste sur une trajectoire rectiligne et où l'outil de travail, par exemple la plaque d'éjection, voire le seul bord avant de cet outil, se déplace vers la feuille et celles dans lesquelles la barre de pince se rapproche de l'outil de travail. Parmi les secondes solutions, on a proposé de déplacer les guides-chaínes et la barre de pince, le mouvement étant synchronisé sur la commande d'autres mouvements de travail de l'élément en plaque, par exemple de l'éjection. Une telle solution est extrêmement complexe dans la mesure où pour déplacer un tel ensemble, il est nécessaire de prévoir des moyens de guidage des cames. En outre, la masse d'un tel ensemble mobile pose des problèmes d'accélérations qui limitent les cadences de la machine et nécessite des guides-chaínes articulés complexes avec des biellettes d'actionnement pour provoquer l'allongement des guides-chaínes pour leur permettre de suivre la trajectoire des chaínes.Several solutions have already been proposed to the sheets transported by the clamp bar in contact with the ejector plate. Among these we can divide proposed solutions between those in which the clip bar stays on a straight path and where the working tool, for example the ejection plate, or even the only front edge of this tool, moves to the sheet and those in which the clip bar gets closer to the work tool. Among the second solutions, it was proposed to move the chain guides and the clamp bar, the movement being synchronized to the control of other movements working of the plate element, for example ejection. Such a solution is extremely complex in the extent to move such a set, it is necessary to provide means for guiding the cams. In addition, the mass of such a mobile assembly poses problems of accelerations which limit the rates of the machine and requires complex articulated chain guides with connecting rods of actuation to cause the extension of the guide-chains to enable them to follow the trajectory of chains.

On a proposé de résoudre ce problème en insérant une came aux extrémités de la barre de pince entre deux maillons des chaínes et en disposant un galet fixe dans la trajectoire de ces cames. La longueur de ces cames est donc limitée par celle de la pièce d'attache de la barre de pinces aux chaínes dont la longueur est elle-même limitée par le diamètre des roues de la chaíne, de sorte que l'accélération communiquée à la barre de pince est très grande. Si celle-ci est supportable dans le cas de feuilles de carton épais, notamment dans le cas de feuilles de carton ondulé, elle ne l'est pas pour des feuilles plus minces et donc plus fragiles. Il n'est pas possible d'accroítre la longueur de ces cames du fait que les chaínes d'entraínement des barres de pinces forment des boucles sans fin qui tournent sur des roues, de sorte que la longueur des cames ne peut pas excéder celle des maillons de ces chaínes.It has been proposed to solve this problem by inserting a cam at the ends of the clamp bar between two links chains and by placing a fixed roller in the trajectory of these cams. The length of these cams is therefore limited by that of the attachment piece of the clip bar to chains whose length is itself limited by the diameter wheels of the chain, so that the acceleration communicated to the clamp bar is very large. If this one is bearable in the case of thick cardboard sheets, particularly in the case of corrugated sheets, it does not is not for thinner leaves and therefore more fragile. It is not possible to increase the length of these cams because the bars drive bars claws form endless loops that turn on wheels, so that the length of the cams can not exceed that of the links of these chains.

On a encore proposé d'infléchir la trajectoire de la barre de pinces par la forme des guides-chaínes, pour faire descendre cette barre de pinces à son point d'arrêt qui correspond à l'endroit où les pinces de la barre sont à l'extrémité avant de l'outil de travail. Une telle solution consiste en quelque sorte à créer un défaut dans le guidage normal des chaínes, les obligeant à épouser cette trajectoire infléchie, non seulement lorsque la barre de pinces arrive à son point d'arrêt et lorsque sa vitesse est faible, voire nulle, mais tout au long du reste du cycle de déplacement des feuilles où la vitesse est élevée, ce qui pose évidemment des problèmes d'usure et de vibrations. It was further suggested that the trajectory of the gripper bar by the shape of the guide-chains, to make lower this bar of tongs to its stopping point which corresponds at the point where the bar clamps are at the end before the work tool. Such a solution consists of somehow to create a fault in the guidance normal chains, forcing them to marry this trajectory inflected, not only when the clip bar arrives at his stopping point and when his speed is low, even zero, but throughout the rest of the displacement cycle leaves where the speed is high, which poses obviously problems of wear and vibration.

Le but de la présente invention est de remédier, au moins en partie, aux inconvénients des solutions susmentionnées.The object of the present invention is to remedy the less in part, the disadvantages of the above-mentioned solutions.

A cet effet, la présente invention a pour objet une station de travail d'une machine de transformation d'éléments en plaques selon la revendication 1.For this purpose, the subject of the present invention is a workstation of an element processing machine in plates according to claim 1.

Grâce à cette solution, les masses en mouvement sont relativement faibles. Le fait que la came d'abaissement de la barre de pinces se trouve sur le bâti de la presse à platine et non plus entre deux maillons de la chaíne permet d'augmenter sensiblement sa longueur, puisque celle-ci n'est plus tributaire de celle des maillons et de réduire les accélérations. De ce fait, la station de travail selon la présente invention peut être utilisée pour traiter des feuilles plus minces et moins rigides que celles qui pouvaient être traitées dans le cas de l'art antérieur. Un autre avantage de cette solution réside dans sa simplicité, gage de fiabilité. Comme on pourra le constater au cours de la description qui suit, le réglage des éléments de cette station de travail est précis et facile à effectuer.Thanks to this solution, moving masses are relatively weak. The fact that the lowering cam of the clamp bar is located on the frame of the platen press and no longer between two links of the chain allows significantly increase its length, since it is not more dependent on the links and reduce acceleration. As a result, the workstation according to this invention can be used to treat leaves thinner and less rigid than those that could be treated in the case of the prior art. Another advantage This solution lies in its simplicity, a guarantee of reliability. As we will see during the description following, the setting of the elements of this station work is accurate and easy to perform.

D'autre particularités et avantages de la présente invention apparaítront au cours de la description qui suit et qui sera faite à l'aide des dessins annexés qui illustrent, schématiquement et à titre d'exemple, une forme d'exécution de la station de travail d'une machine de transformation d'éléments en plaques, appliqué de préférence dans une station d'éjection, objet de la présente invention.

  • La figure 1 est une vue en coupe selon la ligne I-I de la figure 3;
  • la figure 2 est une vue en élévation selon la ligne II-II de la figure 1;
  • la figure 3 est une vue de dessus selon la ligne III-III de la figure 1.
    • Other features and advantages of the present invention will become apparent from the description which follows and which will be made with the aid of the accompanying drawings which illustrate, schematically and by way of example, an embodiment of the workstation. a plate element processing machine, preferably applied in an ejection station, object of the present invention.
  • Figure 1 is a sectional view along line II of Figure 3;
  • Figure 2 is an elevational view along the line II-II of Figure 1;
  • FIG. 3 is a view from above along the line III - III of FIG.

    • Dans la description qui suit, les termes «avant» et «arrière» se réfèrent à la direction de déplacement F de la barre de pince. Etant donné que l'invention se rapporte spécialement à la pose des feuilles traitées sur l'outil de travail, de préférence, la plaque d'éjection et non à l'éjection proprement dite, l'éjection des découpes et les moyens utilisé pour cette éjection ne seront ni décrits, ni représentés au cours de la description qui suit. Par ailleurs, puisque le mécanisme du dispositif d'éjection qui sera décrit est symétrique par rapport à l'axe longitudinal médian de la presse à platine à laquelle ce dispositif d'éjection est associé, cet axe correspondant à la direction de transport F des feuilles découpées, seul un côté de cette station de travail est représenté par les figures du dessin annexé et sera donc décrit au cours de la description.In the following description, the terms "before" and "Backward" refer to the direction of travel F of the clamp bar. Since the invention relates specifically at the laying of treated leaves on the tool of work, preferably the ejection plate and not at the ejection proper, the ejection of the blanks and the means used for this ejection will neither be described nor represented in the description which follows. Otherwise, since the mechanism of the ejection device that will be described is symmetrical with respect to the longitudinal axis median of the platen press to which this ejection device is associated, this axis corresponding to the direction of transport F cut sheets, only one side of this workstation is represented by the drawing figures appended and will therefore be described in the description.

    La station de travail illustrée par les figures 1 à 3 comporte un bâti 1, dont on ne voit que la partie située d'un côté de la trajectoire des feuilles à traiter, une barre de pinces 2 transversale munie de pinces 3 pour pincer le bord avant des feuilles à traiter (non représentées). Chaque extrémité de cette barre de pince est reliée à une chaíne d'entraínement 4 par deux axes d'articulation avant 5, respectivement arrière 6, de cette chaíne d'entraínement 4, fixés chacun à une pièce de liaison 7 qui s'étend des deux côtés de la chaíne d'entraínement 4. Ces deux axes 5, 6 sont situés aux deux extrémités de la chaíne d'entraínement 4 réunies l'une à l'autre par la pièce de liaison 7 en formant une boucle sans fin.The workstation illustrated by Figures 1 to 3 has a frame 1, which we see only the part located on one side of the path of the leaves to be treated, a bar of tweezers 2 provided with tongs 3 to pinch the front edge of the leaves to be treated (not shown). Each end of this clamp bar is connected to a chain 4 by two axes of articulation before 5 respectively rear 6, this chain 4, each attached to a connecting piece 7 which extends from the two sides of the drive chain 4. These two axes 5, 6 are located at both ends of the drive chain 4 joined to each other by the connecting piece 7 forming an endless loop.

    Un seul côté de la barre de pinces 2 étant visible sur les figures du dessin, on ne voit aussi qu'une chaíne. La liaison entre la barre de pinces 2 et les chaínes d'entraínement 4 est bien connue de l'homme de métier et n'a pas besoin d'être décrite plus en détail pour comprendre la présente invention.Only one side of the clip bar 2 being visible on the figures of the drawing, we also see a chain. The connection between the clamp bar 2 and the drive chains 4 is well known to those skilled in the art and does not need to be described in more detail to understand this invention.

    Chaque chaíne d'entraínement 4 prend appui sur un guide-chaíne 8 et passe sur deux roues à chaínes (non représentées) de façon classique dans ce type de machine. Les chaínes d'entraínement 4 sur lesquelles une certaine tension est exercée tendent donc à maintenir les axes d'articulation avant 5 et arrière 6 dans l'alignement des autres maillons de ces chaínes d'entraínement 4, servant ainsi également de moyens de rappel pour maintenir la barre de pince 2 dans une position angulaire déterminée par rapport aux axes d'articulation avant 5 et arrière 6. Comme on peut le voir sur la figure 1, ce guide-chaíne 8 présente, à la sortie du poste de travail, à l'endroit où la barre de pinces 2 pose chaque feuille sur une plaque d'éjection 9, une courte rampe descendante 8a suivie d'une interruption sur une certaine longueur. A la fin de l'interruption, on retrouve le guide-chaíne 8 qui débute par une courte rampe ascendante 8b.Each drive chain 4 is supported on a guide-chain 8 and passes on two chain wheels (not shown) conventionally in this type of machine. The chains 4 on which a certain tension is exerted therefore tend to maintain the axes of articulation front 5 and back 6 in alignment with other links of these training chains 4, thus also serving as return means for holding the clamp bar 2 in a angular position determined with respect to the axes of articulation before 5 and back 6. As can be seen on the figure 1, this guide-chain 8 presents, at the exit of the post at the place where the clip bar 2 is leaf on an ejection plate 9, a short down ramp 8a followed by an interruption over a certain length. At the end of the interruption, we find the guide-chain 8 which starts with a short ascending ramp 8b.

    Une came 10 de descente de la barre de pinces 2 se trouve en face de l'interruption du guide-chaíne 8. Cette came 10 est fixée au bâti 1 par des vis 11. Le bord supérieur de cette came 10 se situe sous une portion saillante 1a du bâti 1 (figures 1 et 2).A cam 10 of descent of the clamp bar 2 is found in front of the interruption of the guide-chain 8. This cam 10 is fixed to the frame 1 by screws 11. The upper edge of this cam 10 is located under a protruding portion 1a of the frame 1 (Figures 1 and 2).

    Un galet palpeur 12, solidaire de la barre de pinces 2, est situé, de préférence, à chaque extrémité de cette barre de pince 2. Ce galet est disposé à proximité de l'axe d'articulation arrière 6 de la chaíne d'entraínement 4, reliant cette dernière à la pièce de liaison 7 et qui se situe à proximité des pinces 3 de la barre de pinces 2 ainsi qu'à celle du galet palpeur 12.A feeler wheel 12, integral with the clamp bar 2, is preferably located at each end of this bar 2. This roller is disposed near the axis of articulation rear 6 of the drive chain 4, connecting the latter at link 7 and which is located at near the clamps 3 of the clamp bar 2 as well as that of the feeler roller 12.

    Lorsque ce galet palpeur 12 solidaire de la barre de pinces 2 arrive sous la came 10, il fait descendre progressivement l'arrière de la barre de pinces 2. L'axe avant 5 étant retenu par le guide-chaíne 8, la barre de pince pivote autour de cet axe avant 5 d'un angle α comme dans la position illustrée par la figure 1, amenant le bord avant de la feuille, tenu par les pinces 3 de la barre de pinces 2, au niveau de l'outil de travail 9.When this feeler roller 12 integral with the bar of tweezers 2 comes under the cam 10, it makes it come down gradually the back of the clamp bar 2. The front axle 5 being retained by the guide-chain 8, the clamp bar pivots around this axis before 5 of an angle α as in the position illustrated in Figure 1, bringing the leading edge of the sheet, held by the clamps 3 of the clamp bar 2, at level of the working tool 9.

    Etant donné que le pivotement du bord arrière de la barre de pinces 2 par la came 10 provoque une surtension des chaínes d'entraínement 4, lorsque la barre de pinces 2 continue son déplacement dans la direction de la flèche F, le galet palpeur 12 suit le bord inférieur de la came 10 et fait ainsi remonter l'axe de pivotement arrière 6 de la barre de pinces 2. Cet axe de pivotement arrière 6 rencontre ensuite la rampe ascendante 8b du guide-chaíne 8 qui guide à nouveau les deux axes d'articulation 5, 6 entre la barre de pinces 2 et les chaínes d'entraínement 4 qui se situent aux deux extrémités de cette barre de pinces 2.Since the pivoting of the rear edge of the clamp bar 2 by the cam 10 causes an overvoltage of drive chains 4, when the clamp bar 2 continues its movement in the direction of arrow F, the feeler roller 12 follows the lower edge of the cam 10 and makes up the rear pivot axis 6 of the clip bar 2. This rear pivot pin 6 encounters then the ascending ramp 8b of the guide-chain 8 which guides to again the two articulation axes 5, 6 between the bar of clamps 2 and the drive chains 4 which are located at the two ends of this clamp bar 2.

    Comme on peut le constater, la came fixe 10, dont la longueur n'est pas limitée par celle des maillons des chaínes d'entraínement, permet de limiter les accélérations communiquées à la barre de pinces 2 au cours de son mouvement de basculement autour de l'axe avant 5. Cet allongement de la longueur de la course de la barre de pinces 2 pendant laquelle cette barre de pinces est abaissée s'ajoute au fait que la distance entre les axes d'articulation 5 et 6 reliant ces chaínes d'entraínement 4 à la barre de pinces 2 est légèrement supérieure à la longueur d'un maillon de ces chaínes 4, augmentant le rayon de pivotement de l'axe mobile 6 autour de l'axe fixe 5 en appui sur le guide-chaíne 8.As can be seen, the fixed cam 10, whose length is not limited by chain links of training, makes it possible to limit the accelerations communicated at the tweezers bar 2 during his movement tilting around the front axle 5. This lengthening of the length of the stroke of the clamp bar 2 during which this clip bar is lowered adds to the fact that the distance between the articulation axes 5 and 6 connecting these drive chains 4 at the clip bar 2 is slightly greater than the length of a link in these chains 4, increasing the swing radius of the movable axis 6 around the fixed axis 5 resting on the guide-chain 8.

    Les moyens mis en oeuvre pour obtenir ce résultat sont particulièrement simples, aussi bien du point de vue de la fabrication que de l'utilisation de la machine. Les moyens utilisés sont sensiblement plus simples que dans la plupart des solutions proposées pour amener les feuilles découpées sur la plaque d'éjection. Par rapport à la solution qui utilise des cames mobiles solidaire des chaínes d'entraínement, la solution selon la présente invention est tout aussi simple mais permet par contre de réduire les accélérations communiquées à la barre de pinces, ce qui n'est pas possible lorsque la longueur de la came est limitée par les entre-axes des maillons des chaínes d'entraínement 4.The means implemented to obtain this result are particularly simple, both from the point of view of manufacturing than the use of the machine. Ways used are significantly simpler than most proposed solutions to bring the cut leaves on the ejector plate. Compared to the solution that uses mobile cams integral with the drive chains, the solution according to the present invention is just as simple but allows, on the other hand, to reduce the accelerations communicated to the clip bar, which is not possible when the length of the cam is limited by the interaxles linkages of the drive chains 4.

    En effet, comme ces chaínes d'entraínement doivent passer autour de roues à chaínes pour ramener les barres de pinces prendre une autre feuille pour effectuer un nouveau cycle de découpage/éjection, la longueur de ces cames ne peut pas excéder sensiblement celle des entre-axes. De ce fait, la course de descente des barres de pinces étant une constante de même que la longueur des maillons, l'accélération communiquée à la barre de pinces 2 par les cames de descente 10 est fonction de la vitesse d'entraínement des barres de pinces et c'est ce qui limite cette vitesse d'entraínement et par conséquent la cadence de la presse à platine.Indeed, as these chains of training must pass around chain wheels to bring back the bars of tongs take another sheet to perform a new cutting cycle / ejection, the length of these cams can not substantially exceed that of the inter-axes. From this fact, the down stroke of the clip bars being a constant as well as the length of the links, the acceleration communicated to the clamp bar 2 by the cams of descent 10 is a function of the speed of training of clip bars and that's what limits this speed of training and therefore the rate of the platen press.

    En permettant d'augmenter sensiblement la durée de la phase de descente de la barre de pinces grâce à l'augmentation sensible de la longueur de la came 10 par rapport aux cames solidaires des chaínes d'entraínement et grâce au fait que l'écartement entre les axes d'articulation avant 5 et arrière 6 qui relient la barre de pinces 2 aux chaínes d'entraínement 4, est supérieur à la longueur des maillons, on peut donc accroítre sensiblement, à accélération constante, la cadence de traitement des feuilles découpées par la presse à platine à laquelle le dispositif selon la présente invention est associé. Suivant la nature des feuilles à traiter, on pourrait au contraire conserver une cadence moins élevée de manière à réduire les accélérations communiquées à la feuille lors de l'abaissement de la barre de pinces 2. By enabling the duration of the descending phase of the clip bar thanks to the increase sensitive the length of the cam 10 relative to cams solidary chain drives and thanks to the fact that the spacing between the hinge pins before 5 and rear 6 which connect the clip bar 2 to the drive chains 4, is greater than the length of the links, can therefore increase substantially, with constant acceleration, the rate of treatment of leaves cut by the press platinum to which the device according to the present invention is associated. Depending on the nature of the leaves to be treated, we could instead keep a lower rate increased in order to reduce the accelerations communicated to the leaf when lowering the gripper bar 2.

    Certaines variantes de la station de travail décrite pourraient être envisagées. Ainsi, bien que la description qui précède parle de l'utilisation de chaínes d'entraínement 4, qui constituent les moyens traditionnels d'entraínement dans ce type de machine, on pourrait aussi envisager l'utilisation de tout autre moyen de liaison et d'entraínement tel que courroies, courroies dotées d'éléments d'entraínement, courroies métalliques ou à armature, etc. Bien que dans la forme d'exécution illustrée, les moyens pour rappeler la barre de pince 2 dans une position déterminée autour des axes avant 5 et arrière 6 sont constitués par la tension des chaínes d'entraínement, on pourrait aussi imaginer un autre mode de liaison entre la barre de pinces 2 et les chaínes d'entraínement 4 et des moyens distincts de ces chaínes 4 pour rappeler la barre de pinces 2 dans une position déterminée autour d'un seul axe transversal solidaire des chaínes 4. Enfin, bien que de préférence on utilise deux cames de descente 10, une à chaque extrémité de la barre de pinces, on pourrait aussi n'en utiliser qu'une qui pourrait aussi être située au milieu de la barre de pinces plutôt qu'à une extrémité.Some variants of the workstation described could be considered. So, although the description above refers to the use of drive chains 4, which constitute the traditional means of training in this type of machine, one could also consider the use any other means of connection and training such as belts, belts with drive elements, metal or reinforced straps, etc. Although in the illustrated embodiment, the means for recalling the clamp bar 2 in a determined position around front and rear axles 5 and 6 are constituted by the tension chains of training, one could also imagine a another mode of connection between the clamp bar 2 and the channels of training 4 and separate means of these chains 4 to recall the clip bar 2 in one position determined around a single integral transverse axis 4. Finally, although preferably two downhill cams 10, one at each end of the bar tongs, we could also use only one that could also be located in the middle of the pliers bar rather only at one end.

    Claims (3)

    Station de travail d'une machine de transformation d'éléments en plaques, comprenant un bâti (1), un outil de travail (9) sur lequel ladite plaque doit être posée, une barre de pinces (2) transversale pour saisir le bord avant de cette feuille, deux éléments d'entraínement souples (4) en forme de boucles sans fins solidaires chacun d'une extrémité de ladite barre de pinces (2), des moyens pour guider lesdits éléments d'entraínement souple sur ledit bâti et des moyens pour rapprocher ladite barre de pinces (2) dudit outil de travail (9) lorsque cette barre de pinces (2) franchit l'extrémité aval de cet outil de travail (9), caractérisée en ce que ladite barre de pinces (2) présente au moins un axe d'articulation transversal (5, 6) par rapport auxdits éléments d'entraínement et est associée à des moyens de rappel (4) pour la maintenir dans une position déterminée autour dudit axe d'articulation transversal (5, 6) et à au moins un palpeur de came (12) formant un bras de levier par rapport audit axe d'articulation transversal et en ce qu'une came d'abaissement (10) de cette barre de pinces (2), solidaire dudit bâti (1) est disposée sur la trajectoire dudit palpeur (12) pour provoquer le pivotement de ladite barre de pinces (2) autour dudit axe d'articulation (5, 6) de manière à rapprocher temporairement lesdites pinces dudit outil de travail (9).Workstation of a plate element processing machine, comprising a frame (1), a working tool (9) on which said plate is to be placed, a cross bar (2) for gripping the front edge of this sheet, two flexible drive elements (4) in the form of endless loops each secured to one end of said clamp bar (2), means for guiding said flexible drive elements on said frame and means for bringing said gripper bar (2) closer to said working tool (9) when said gripper bar (2) passes the downstream end of said working tool (9), characterized in that said gripper bar (2) has at least one transverse articulation axis (5, 6) with respect to said drive elements and is associated with return means (4) for holding it in a determined position about said transverse articulation axis (5, 6) and at least one cam follower (12) forming a lever arm with respect to said transverse hinge axis and in that a lowering cam (10) of this gripper bar (2) integral with said frame (1) is arranged on the path of said feeler (12) for causing said gripper bar (2) to pivot about said hinge axis (5, 6) so as to temporarily bring said grippers closer to said working tool (9). Station de travail selon la revendication 1, dans laquelle, deux chaínes d'entraínement (4) dont deux axes d'articulation, avant (5) respectivement arrière (6) de chacune d'elles sont solidaires des extrémités respectives de ladite barre de pinces (2), des guides-chaínes (8) solidaires dudit bâti (1) sont en contact avec ces chaínes (4) et sont conformés pour permettre de faire pivoter l'arrière de ladite barre de pinces (2) autour dudit axe d'articulation avant (5) en appui sur lesdits guides-chaínes (8), lors de la rencontre desdits palpeurs (12) avec lesdites cames (10).Workstation according to claim 1, in which, two drive chains (4) including two axes articulation, front (5) respectively rear (6) of each of them are integral with the respective ends of said clamp bar (2), integral chain guides (8) said frame (1) are in contact with these chains (4) and are shaped to allow rotation of the back said clip bar (2) about said hinge axis before (5) resting on said guide-chains (8), when of the meeting of said feelers (12) with said cams (10). Station de travail selon l'une des revendications précédentes dans laquelle lesdits palpeurs de cames (12) sont situés au voisinage desdits axes d'articulation arrières (6) entre ladite barre de pinces (2) et lesdites chaínes d'entraínement.Workstation according to one of the claims in which said cam sensors (12) are located in the vicinity of said rear articulation axes (6) between said clip bar (2) and said chains drive.
    EP03405716A 2003-10-07 2003-10-07 Working station in a machine transforming plate-like elements Expired - Lifetime EP1522512B1 (en)

    Priority Applications (4)

    Application Number Priority Date Filing Date Title
    ES03405716T ES2259755T3 (en) 2003-10-07 2003-10-07 WORK STATION OF A TRANSFORMING MACHINE OF ELEMENTS IN SHEETS.
    EP03405716A EP1522512B1 (en) 2003-10-07 2003-10-07 Working station in a machine transforming plate-like elements
    AT03405716T ATE319640T1 (en) 2003-10-07 2003-10-07 WORK STATION OF A CONVERSION MACHINE FOR PLATE-SHAPED ELEMENTS
    DE60303918T DE60303918T2 (en) 2003-10-07 2003-10-07 Workstation of a plate-shaped element conversion machine

    Applications Claiming Priority (1)

    Application Number Priority Date Filing Date Title
    EP03405716A EP1522512B1 (en) 2003-10-07 2003-10-07 Working station in a machine transforming plate-like elements

    Publications (2)

    Publication Number Publication Date
    EP1522512A1 true EP1522512A1 (en) 2005-04-13
    EP1522512B1 EP1522512B1 (en) 2006-03-08

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    ID=34307061

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP03405716A Expired - Lifetime EP1522512B1 (en) 2003-10-07 2003-10-07 Working station in a machine transforming plate-like elements

    Country Status (4)

    Country Link
    EP (1) EP1522512B1 (en)
    AT (1) ATE319640T1 (en)
    DE (1) DE60303918T2 (en)
    ES (1) ES2259755T3 (en)

    Citations (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US5555969A (en) * 1994-05-04 1996-09-17 Bobst Sa Device for fastening a gripper bar on a chain train in a machine that processes plate-like workpieces
    US5562279A (en) * 1994-05-04 1996-10-08 Bobst Sa Combination gripper bar and device for fastening the gripper bar on a chain train in a machine for processing plate-like workpieces
    US6003858A (en) * 1997-11-18 1999-12-21 Heidelberger Druckmaschinen Ag Chain conveyor for transporting sheets in a printing press
    US20010040334A1 (en) * 2000-05-05 2001-11-15 Bobst S.A. Device for positioning sheets in a machine station

    Patent Citations (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US5555969A (en) * 1994-05-04 1996-09-17 Bobst Sa Device for fastening a gripper bar on a chain train in a machine that processes plate-like workpieces
    US5562279A (en) * 1994-05-04 1996-10-08 Bobst Sa Combination gripper bar and device for fastening the gripper bar on a chain train in a machine for processing plate-like workpieces
    US6003858A (en) * 1997-11-18 1999-12-21 Heidelberger Druckmaschinen Ag Chain conveyor for transporting sheets in a printing press
    US20010040334A1 (en) * 2000-05-05 2001-11-15 Bobst S.A. Device for positioning sheets in a machine station

    Also Published As

    Publication number Publication date
    ATE319640T1 (en) 2006-03-15
    DE60303918T2 (en) 2006-10-19
    ES2259755T3 (en) 2006-10-16
    DE60303918D1 (en) 2006-05-04
    EP1522512B1 (en) 2006-03-08

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