EP1593468A1 - Device for the sequencial transport of sheets in a platen press - Google Patents

Device for the sequencial transport of sheets in a platen press Download PDF

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Publication number
EP1593468A1
EP1593468A1 EP04405281A EP04405281A EP1593468A1 EP 1593468 A1 EP1593468 A1 EP 1593468A1 EP 04405281 A EP04405281 A EP 04405281A EP 04405281 A EP04405281 A EP 04405281A EP 1593468 A1 EP1593468 A1 EP 1593468A1
Authority
EP
European Patent Office
Prior art keywords
frame
working frame
nozzles
bar
sheets
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
EP04405281A
Other languages
German (de)
French (fr)
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EP1593468B1 (en
Inventor
Jean-François Pollien
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bobst Mex SA
Original Assignee
Bobst SA
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 Bobst SA filed Critical Bobst SA
Priority to EP04405281A priority Critical patent/EP1593468B1/en
Priority to AT04405281T priority patent/ATE347472T1/en
Priority to DE602004003561T priority patent/DE602004003561T2/en
Publication of EP1593468A1 publication Critical patent/EP1593468A1/en
Application granted granted Critical
Publication of EP1593468B1 publication Critical patent/EP1593468B1/en
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Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • 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
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/10—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by toggle mechanism
    • B30B1/14—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by toggle mechanism operated by cams, eccentrics, or cranks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/08—Means for actuating the cutting member to effect the cut
    • B26D5/16—Cam means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/08—Means for actuating the cutting member to effect the cut
    • B26D5/18—Toggle-link means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/40—Cutting-out; Stamping-out using a press, e.g. of the ram type
    • 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
    • B65H2701/173—Metal

Definitions

  • the present invention relates to a device for sequential transport of leaves in a platen press comprising gripper bars whose respective ends are attached to two flexible elements in the form of endless loops each one respectively engaged with a wheel with intermittent drive and at least one freewheel, a quadrangular working frame and a movable bed frame arranged on either side of the trajectory of the clamps said bar and nozzles connected to an air supply under pressure, to direct air jets to the bed base mobile during the stop phase of the clamp bar, for stopping said sheets successively between the frame of work and the mobile bed frame.
  • a clip bar When a clip bar carries a leaf, it grab it by its front edge and bring it between the chassis of work and cutting sheet fixed on the movable bed base of the platen press. At the end of the race, the clip bar decelerates sharply before coming to a stop and is raised as soon as it comes out of the rear transverse edge of the chassis of job.
  • nozzles for blowing air under pressure are arranged behind the rear transverse edge of the working frame, so that the flow of air is interrupted before the complete arrest of the forceps and while a still relatively large space still separates the box spring of the working frame.
  • the blowing of the air stops before the leaf and the space that remains at this moment between the working frame and the mobile bed does not exclude that the sheet is still deformed under the effect the strong deceleration.
  • the object of the present invention is to remedy the least in part to the aforementioned disadvantages which to slow down work rates to avoid wrinkling leaves.
  • the subject of the present invention is a device sequential transport of leaves in a press platen according to claim 1.
  • the position of the nozzles makes the flow effective air virtually until the leaf stops.
  • the sheet remains substantially flat and is therefore stopped with greater security. This can allow to increase the working rates of the platen press without increasing the risk of defects or jamming of the machine.
  • the proposed solution is particularly simple, both from the point of view of manufacture and use of the device.
  • Two soft elements in the form of endless loops preferably consist of two parallel chain trains endless platen press, of which only a 1 is visible in FIG. 1 are driven in the direction of the arrow F by two drive chain wheels of which only one 2 is visible in Figure 1, these wheels being secured to a same training tree. 3.
  • the intermittent drive mechanism of the shaft 3 is well known to those skilled in the art and secondly, that it is not necessary to understand the present invention, it is neither represented nor described.
  • These chains 1 pass around a second freewheel 2a to form an endless loop.
  • Clips bars 4 are fixed by their ends respective two parallel chain trains 1, so that they extend transversely to the direction of displacement F of these chain trains 1. Their trajectory passes between a working frame 5 disposed above the trajectory of the clamp bars 4 and a movable bed base 6 disposed below this trajectory.
  • This mobile bed frame 6 is associated with guide means along a trajectory vertically and operated along these guide means (no represented) by a drive mechanism E with movement alternative vertical in opposite direction, illustrated very schematically since it is not part of this invention, so that it allows alternatively to bring closer and to move the bed frame 6 away from the working frame 5.
  • the platen press is used to cut sheets 7 brought between the frame 5 and the movable bed base 6, so that the frame 5 carries a board 8 in which are provided grooves, shaped according to the shape of the cuts to be performed on the sheets 7 and intended to receive cutting sheets 9 carried by the movable bed base 6.
  • the rear transverse edge 5a of the working frame 5, illustrated in section by Figures 2 and 3 as well as in perspective in Figure 4 is crossed by a plurality of vertical tubular ducts 10 regularly distributed on along this rear edge 5a so as to pass between the clamps 4a of the clamp bar 4.
  • the lower end of these tubular ducts 10 is closed.
  • a nozzle 11 oriented laterally, opens in close proximity to this end closed to form a jet towards the movable bed 6, so that this throw will be directed against sheet 7 when braking the gripper bar 4, with a view to maintain flat against the deceleration force that exerts itself on her, and tends to make her wavy.
  • the other end of the tubular ducts 10 opens into a channel supply 12, advantageously of rectangular section, fixed by screws 13 on the upper face of the bar transverse 5a of the working frame 5.
  • the upper face of this rectangular feeding channel 12 comprises in its middle a connection opening 14, intended to come into taken with a vertical supply duct 16 provided with a seal 15, connected to a source of air under pressure S.
  • the vertical feed duct 16 is mounted sliding in a support 21 secured to the frame of the hurry.
  • a spring 22 surrounds the supply duct 16 and is supported on the one hand against the underside of the support 21 and on the other hand against a scope 16a provided for the lower end of the supply duct 16. As soon as the supply duct is subjected to the force of the spring 22, its lower end 16b is applied against the opening connection 14 of the feed channel 12 and the seal 15 is compressed by spring 22 against the upper face of the feed channel 12.
  • the working frame 5 constitutes a removable element which is slidably mounted on a cross slide 23 of the platen press and has handles for this purpose 17 integral with the one side edge 5b of this frame 5, allowing it to be set up and removed.
  • the connection opening 14 is disposed opposite of the end of the supply duct 16 of the platen press to establish the connection and to ensure thus the feeding of the nozzles 11.
  • the distribution of compressed air to these nozzles 11 is carried out by the command of the machine and intervenes when braking trains of chains 1.
  • a movable chain guide 18 secured to the rod 19 passing through a guide a 20 is located just downstream from the exit of the platen press.
  • Figure 2 shows the chain guide 18 in the low position and
  • FIG. 3 shows it in position raised.
  • Figures 2 and 3 illustrate the clip bar 4 in two different positions of the feeding process of a sheet 7 between the working frame 5 carrying the board to cut 8 and the movable bed base 6 carrying the sheet to be cut 9.
  • the first of these figures corresponds to the braking the clamp bar 4, the movable bed base 6 being removed from the working frame 5.
  • the clamps 4a of the clamp bar 4 are located at the lower level of the profile forming the clip bar 4 so that the sheet 7 is moved very close to the surface mobile bed base 6 for the reasons mentioned above.
  • the compressed air jets nozzles 11 encounter no obstacle, so that the sheet 7 is subjected to the pressure of this air during the braking of the clamp bar 4 and is thus maintained plane.

Abstract

The device has a work frame (5) and a movable platen (6) placed on both sides of a path for clamps of a collet chuck (4) and nozzles (11) connected to supply of air under pressure, for directing air jet towards the platen. The air jet is directed during stop phase of the chuck, to stop sheets (7) between the frame and the platen. The nozzles are situated under rear transversal edge (5a) of the work frame.

Description

La présente invention se rapporte à un dispositif de transport séquentiel des feuilles dans une presse à platines comprenant des barres de pinces dont les extrémités respectives sont solidaires de deux éléments souples en forme de boucles sans fins chacun en prise respectivement avec une roue à entraínement intermittent et au moins une roue libre, un châssis de travail quadrangulaire et un sommier mobile disposés de part et d'autre de la trajectoire des pinces de ladite barre et des buses reliées à une alimentation en air sous pression, pour diriger des jets d'air vers le sommier mobile durant la phase d'arrêt de la barre de pinces, pour arrêter successivement lesdites feuilles entre le châssis de travail et le sommier mobile.The present invention relates to a device for sequential transport of leaves in a platen press comprising gripper bars whose respective ends are attached to two flexible elements in the form of endless loops each one respectively engaged with a wheel with intermittent drive and at least one freewheel, a quadrangular working frame and a movable bed frame arranged on either side of the trajectory of the clamps said bar and nozzles connected to an air supply under pressure, to direct air jets to the bed base mobile during the stop phase of the clamp bar, for stopping said sheets successively between the frame of work and the mobile bed frame.

Lorsqu'une barre de pinces transporte une feuille, elle la saisit par son bord avant et l'amène entre le châssis de travail et la tôle à découper fixée sur le sommier mobile de la presse à platine. En fin de course, la barre de pinces décélère fortement avant de s'immobiliser et est soulevée dès qu'elle sort du bord transversal arrière du châssis de travail.When a clip bar carries a leaf, it grab it by its front edge and bring it between the chassis of work and cutting sheet fixed on the movable bed base of the platen press. At the end of the race, the clip bar decelerates sharply before coming to a stop and is raised as soon as it comes out of the rear transverse edge of the chassis of job.

Pendant cette brusque décélération de la barre de pinces, il est important d'empêcher que la feuille se déforme et l'obliger à rester pratiquement plane. Lorsqu'une feuille souple ainsi transportée subit une forte décélération, elle se déforme en priorité vers le bas en raison de la force de gravité qui s'exerce sur elle. C'est la raison pour laquelle les pinces de la barre de pinces se situent de préférence au niveau de la face inférieure du profilé formant la barre de pinces, pour que la feuille se déplace aussi près que possible du sommier mobile. Pour éviter que la feuille ainsi décélérée ne se déforme vers le haut, on a déjà proposé de former un écoulement d'air sous pression entre la feuille et la planche fixée à l'intérieur du châssis de travail de la presse à platine. Toutefois, dans les solutions proposées jusqu'ici, les buses de soufflage de l'air sous pression sont disposées en arrière du bord transversal arrière du châssis de travail, en sorte que l'écoulement de l'air est interrompu avant l'arrêt complet des pinces et alors qu'un espace encore relativement important sépare encore le sommier du châssis de travail. De ce fait, le soufflage de l'air s'arrête avant la feuille et l'espace qui subsiste à ce moment entre le châssis de travail et le sommier mobile n'exclut pas que la feuille ne se déforme encore sous l'effet de la forte décélération.During this sudden deceleration of the clip bar, it is important to prevent the leaf from being deformed and make him stay practically flat. When a leaf flexible thus transported undergoes a sharp deceleration, it deforms down primarily because of the strength of the gravity exerted on her. This is the reason why clamps on the gripper bar are preferably located at level of the underside of the profile forming the bar of pliers, so that the leaf moves as close as possible mobile bed base. To prevent the sheet thus decelerated does not deform upward, it has already been proposed to forming a flow of pressurized air between the sheet and the board attached to the inside of the work frame of the platen press. However, in the proposed solutions so far, nozzles for blowing air under pressure are arranged behind the rear transverse edge of the working frame, so that the flow of air is interrupted before the complete arrest of the forceps and while a still relatively large space still separates the box spring of the working frame. As a result, the blowing of the air stops before the leaf and the space that remains at this moment between the working frame and the mobile bed does not exclude that the sheet is still deformed under the effect the strong deceleration.

Le but de la présente invention est de remédier, au moins en partie aux inconvénients susmentionnés, qui obligent à ralentir les cadences de travail pour éviter le plissement des feuilles.The object of the present invention is to remedy the least in part to the aforementioned disadvantages which to slow down work rates to avoid wrinkling leaves.

A cet effet, la présente invention a pour objet un dispositif de transport séquentiel des feuilles dans une presse à platines selon la revendication 1.For this purpose, the subject of the present invention is a device sequential transport of leaves in a press platen according to claim 1.

La position des buses permet de rendre l'écoulement d'air efficace pratiquement jusqu'à l'arrêt de la feuille. De ce fait, la feuille reste pratiquement plane et est donc arrêtée avec une plus grande sécurité. Ceci peut permettre d'augmenter les cadences de travail de la presse à platine sans augmenter les risques de défauts ou de bourrage de la machine. Comme on le constatera au cours de la description qui suit, la solution proposée est particulièrement simple, aussi bien du point de vue de la fabrication que de l'utilisation du dispositif.The position of the nozzles makes the flow effective air virtually until the leaf stops. As a result, the sheet remains substantially flat and is therefore stopped with greater security. This can allow to increase the working rates of the platen press without increasing the risk of defects or jamming of the machine. As will be seen in the description following, the proposed solution is particularly simple, both from the point of view of manufacture and use of the device.

D'autres particularités et avantages de la présente invention apparaítront au cours de la description qui va suivre et qui sera faite à l'aide des dessins annexés qui illustrent, schématiquement et à titre d'exemple, une forme d'exécution du dispositif de transport objet de la présente invention.

  • La figure 1 est une vue en élévation très schématique de la presse à platines et de son dispositif de transport;
  • la figure 2 est une vue partielle en élévation de la partie arrière du châssis de travail de la presse à platine avec la barre de pince dans une première position;
  • la figure 3 est une vue semblable à la figure 2 avec la barre de pinces dans une autre position;
  • la figure 4 est une vue en perspective du châssis de travail représenté partiellement sur les figures 2 et 3;
  • la figure 5 est une vue partielle en coupe selon V-V de la figure 6 montrant un détail de l'étanchéité du circuit d'alimentation en air comprimé;
  • la figure 6 est une vue partielle en élévation selon VI-VI de la figure 5.
    • Other features and advantages of the present invention will become apparent from the following description which will be made with the aid of the accompanying drawings which illustrate, schematically and by way of example, an embodiment of the transport device. object of the present invention.
  • Figure 1 is a very schematic elevational view of the platen press and its transport device;
  • Figure 2 is a partial elevational view of the rear portion of the work frame of the platen press with the clamp bar in a first position;
  • Figure 3 is a view similar to Figure 2 with the clip bar in another position;
  • Figure 4 is a perspective view of the work frame shown partially in Figures 2 and 3;
  • Figure 5 is a partial sectional view along VV of Figure 6 showing a detail of the tightness of the compressed air supply circuit;
  • Figure 6 is a partial elevational view along VI-VI of Figure 5.

    • Deux éléments souples en forme de boucles sans fins, de préférence constitués par deux trains de chaínes parallèles sans fin de la presse à platines, dont seule une 1 est visible sur la figure 1 sont entraínés dans le sens de la flèche F par deux roues à chaínes d'entraínement dont seule l'une 2 est visible sur la figure 1, ces roues étant solidaires d'un même arbre d'entraínement 3. Etant donné d'une part, que le mécanisme d'entraínement intermittent de l'arbre 3 est bien connu de l'homme du métier et d'autre part, qu'il n'est pas nécessaire à la compréhension de la présente invention, il n'est ni représenté ni décrit. Ces chaínes 1 passent autour d'une seconde roue libre 2a pour former une boucle sans fin.Two soft elements in the form of endless loops, preferably consist of two parallel chain trains endless platen press, of which only a 1 is visible in FIG. 1 are driven in the direction of the arrow F by two drive chain wheels of which only one 2 is visible in Figure 1, these wheels being secured to a same training tree. 3. Given, on the one hand, that the intermittent drive mechanism of the shaft 3 is well known to those skilled in the art and secondly, that it is not necessary to understand the present invention, it is neither represented nor described. These chains 1 pass around a second freewheel 2a to form an endless loop.

    Des barres de pinces 4 sont fixées par leurs extrémités respectives aux deux trains de chaínes parallèles 1, de sorte qu'elles s'étendent transversalement à la direction de déplacement F de ces trains de chaínes 1. Leur trajectoire passe entre un châssis de travail 5 disposé au-dessus de la trajectoire des barres de pinces 4 et un sommier mobile 6 disposé au-dessous de cette trajectoire. Ce sommier mobile 6 est associé à des moyens de guidage selon une trajectoire verticale et actionné le long de ces moyens de guidage (non représentés) par un mécanisme d'entraínement E à mouvement vertical alternatif de sens inverse, illustré très schématiquement étant donné qu'il ne fait pas partie de la présente invention, de sorte qu'il permet alternativement de rapprocher et d'éloigner le sommier 6 du châssis de travail 5.Clips bars 4 are fixed by their ends respective two parallel chain trains 1, so that they extend transversely to the direction of displacement F of these chain trains 1. Their trajectory passes between a working frame 5 disposed above the trajectory of the clamp bars 4 and a movable bed base 6 disposed below this trajectory. This mobile bed frame 6 is associated with guide means along a trajectory vertically and operated along these guide means (no represented) by a drive mechanism E with movement alternative vertical in opposite direction, illustrated very schematically since it is not part of this invention, so that it allows alternatively to bring closer and to move the bed frame 6 away from the working frame 5.

    Dans l'exemple illustré, la presse à platines est utilisée pour découper des feuilles 7 amenées entre le châssis de travail 5 et le sommier mobile 6, en sorte que le châssis de travail 5 porte une planche 8 dans laquelle sont ménagées des rainures, conformées en fonction de la forme des découpes à effectuer sur les feuilles 7 et destinées à recevoir des tôles à découper 9 portées par le sommier mobile 6.In the illustrated example, the platen press is used to cut sheets 7 brought between the frame 5 and the movable bed base 6, so that the frame 5 carries a board 8 in which are provided grooves, shaped according to the shape of the cuts to be performed on the sheets 7 and intended to receive cutting sheets 9 carried by the movable bed base 6.

    Le bord transversal arrière 5a du châssis de travail 5, illustré en coupe par les figures 2 et 3 ainsi qu'en perspective par la figure 4 est traversé par une pluralité de conduits tubulaires verticaux 10 répartis régulièrement le long de ce bord arrière 5a de manière à passer entre les pinces 4a de la barre de pinces 4. L'extrémité inférieure de ces conduits tubulaires 10 est fermée. Une buse 11 orientée latéralement, débouche à proximité immédiate de cette extrémité fermée pour former un jet en direction du sommier mobile 6, en sorte que ce jet sera dirigé contre la feuille 7 au moment du freinage de la barre de pinces 4, en vue de la maintenir plane à l'encontre de la force de décélération qui s'exerce sur elle et qui tend à la faire onduler. L'autre extrémité des conduits tubulaires 10 débouche dans un canal d'alimentation 12, avantageusement de section rectangulaire, fixé par des vis 13 sur la face supérieure de la barre transversale 5a du châssis de travail 5. La face supérieure de ce canal d'alimentation rectangulaire 12 comporte en son milieu une ouverture de connexion 14, destinée à venir en prise avec un conduit d'alimentation vertical 16 muni d'un joint d'étanchéité 15, relié à une source d'air sous pression S. Le conduit d'alimentation vertical 16 est monté coulissant dans un support 21 solidaire du bâti de la presse. Un ressort 22 entoure le conduit d'alimentation 16 et prend appui d'une part contre la face inférieure du support 21 et d'autre part contre une portée 16a ménagée à l'extrémité inférieure du conduit d'alimentation 16. Dès que le conduit d'alimentation est soumis à la force du ressort 22, son extrémité inférieure 16b est appliquée contre l'ouverture de connexion 14 du canal d'alimentation 12 et le joint d'étanchéité 15 est comprimé par le ressort 22 contre la face supérieure du canal d'alimentation 12.The rear transverse edge 5a of the working frame 5, illustrated in section by Figures 2 and 3 as well as in perspective in Figure 4 is crossed by a plurality of vertical tubular ducts 10 regularly distributed on along this rear edge 5a so as to pass between the clamps 4a of the clamp bar 4. The lower end of these tubular ducts 10 is closed. A nozzle 11 oriented laterally, opens in close proximity to this end closed to form a jet towards the movable bed 6, so that this throw will be directed against sheet 7 when braking the gripper bar 4, with a view to maintain flat against the deceleration force that exerts itself on her, and tends to make her wavy. The other end of the tubular ducts 10 opens into a channel supply 12, advantageously of rectangular section, fixed by screws 13 on the upper face of the bar transverse 5a of the working frame 5. The upper face of this rectangular feeding channel 12 comprises in its middle a connection opening 14, intended to come into taken with a vertical supply duct 16 provided with a seal 15, connected to a source of air under pressure S. The vertical feed duct 16 is mounted sliding in a support 21 secured to the frame of the hurry. A spring 22 surrounds the supply duct 16 and is supported on the one hand against the underside of the support 21 and on the other hand against a scope 16a provided for the lower end of the supply duct 16. As soon as the supply duct is subjected to the force of the spring 22, its lower end 16b is applied against the opening connection 14 of the feed channel 12 and the seal 15 is compressed by spring 22 against the upper face of the feed channel 12.

    Le châssis de travail 5 constitue un élément amovible qui est monté coulissant sur une glissière transversale 23 de la presse à platines et comporte à cet effet des poignées 17 solidaires l'un bord latéral 5b de ce châssis 5, permettant sa mise en place et son enlèvement. Lors de sa mise en place, l'ouverture de connexion 14 est disposée vis-à-vis de l'extrémité du conduit d'alimentation 16 de la presse à platines permettant d'établir la connexion et d'assurer ainsi l'alimentation des buses 11. La distribution d'air comprimé à ces buses 11 est réalisée par la commande de la machine et intervient au moment du freinage des trains de chaínes 1.The working frame 5 constitutes a removable element which is slidably mounted on a cross slide 23 of the platen press and has handles for this purpose 17 integral with the one side edge 5b of this frame 5, allowing it to be set up and removed. At its implementation, the connection opening 14 is disposed opposite of the end of the supply duct 16 of the platen press to establish the connection and to ensure thus the feeding of the nozzles 11. The distribution of compressed air to these nozzles 11 is carried out by the command of the machine and intervenes when braking trains of chains 1.

    Un guide-chaíne mobile 18, solidaire de la tige 19 traversant un guide un 20 est situé juste en aval de la sortie de la presse à platines. La figure 2 montre le guide-chaíne 18 en position basse et la figure 3 le montre en position soulevée.A movable chain guide 18 secured to the rod 19 passing through a guide a 20 is located just downstream from the exit of the platen press. Figure 2 shows the chain guide 18 in the low position and FIG. 3 shows it in position raised.

    Les figures 2 et 3 illustrent la barre de pinces 4 dans deux positions différentes du processus d'alimentation d'une feuille 7 entre les châssis de travail 5 portant la planche à découper 8 et le sommier mobile 6 portant la tôle à découper 9. La première de ces figures correspond au freinage de la barre de pinces 4, le sommier mobile 6 étant écarté du châssis de travail 5. Comme on peut l'observer sur cette figure, les pinces 4a de la barre de pinces 4 sont situées au niveau inférieur du profilé formant la barre de pinces 4 en sorte que la feuille 7 est déplacée très près de la surface du sommier mobile 6 pour les raisons susmentionnées. Comme on le voit sur cette figure 2, les jets d'air comprimé des buses 11 ne rencontrent aucun obstacle, en sorte que la feuille 7 est soumise à la pression de cet air pendant le freinage de la barre de pinces 4 et est ainsi maintenue plane.Figures 2 and 3 illustrate the clip bar 4 in two different positions of the feeding process of a sheet 7 between the working frame 5 carrying the board to cut 8 and the movable bed base 6 carrying the sheet to be cut 9. The first of these figures corresponds to the braking the clamp bar 4, the movable bed base 6 being removed from the working frame 5. As can be seen on this Figure, the clamps 4a of the clamp bar 4 are located at the lower level of the profile forming the clip bar 4 so that the sheet 7 is moved very close to the surface mobile bed base 6 for the reasons mentioned above. As seen in this figure 2, the compressed air jets nozzles 11 encounter no obstacle, so that the sheet 7 is subjected to the pressure of this air during the braking of the clamp bar 4 and is thus maintained plane.

    Lorsque la barre de pinces 4 arrive vers le bord transversal arrière 5a du châssis 5, la tige 19 du vérin 20 pousse le guide-chaíne mobile 18 vers le haut, dans la position illustrée par la figure 3. En même temps, la barre de pinces 4 s'arrête. Simultanément, le sommier 6 est déplacé vers le châssis 5 pour effectuer le découpage de la feuille 7. Comme on peut le constater sur les figures 2 et 3, les buses 11 peuvent souffler sur la feuille 7 jusqu'à l'arrêt de la barre de pinces et assurer ainsi le maintien à plat de la feuille 7.When the gripper bar 4 comes to the transverse edge rear 5a of the frame 5, the rod 19 of the jack 20 pushes the movable chain guide 18 upwards, in the position shown in Figure 3. At the same time, the clip bar 4 stops. Simultaneously, the bed base 6 is moved to the frame 5 to perform the cutting of the sheet 7. As it can be seen in Figures 2 and 3, the nozzles 11 can blow on sheet 7 until the stop of the bar clamps and thus ensure the flattening of the sheet 7.

    Lors du changement du châssis de travail 5, il suffit de séparer le conduit d'alimentation vertical 16 du canal de distribution 12 en faisant coulisser le conduit d'alimentation 16 vers le haut, à l'encontre de la pression du ressort de rappel 22 et de tirer le châssis de travail à l'aide des poignées 17. Après la remise en place d'un autre châssis de travail 5, la libération du conduit d'alimentation 16 permet au ressort de rappel 22 d'appliquer l'extrémité de ce conduit 16 contre l'ouverture de liaison 14 du canal de distribution 12 et de comprimer le joint d'étanchéité 15 entre la portée annulaire 16a du conduit 16 et le bord de l'ouverture de liaison 14. Il s'agit donc d'une opération qui ne présente aucune difficulté et qui ne requiert aucune habileté particulière.When changing the working frame 5, it suffices to separate the vertical supply duct 16 from the duct distribution 12 by sliding the supply duct 16 up, against the spring pressure 22 and pull the work frame with the help of 17. After the replacement of another chassis of work 5, the release of the supply duct 16 allows to the return spring 22 to apply the end of this conduit 16 against the connection opening 14 of the distribution channel 12 and compress the seal 15 between the annular bearing surface 16a of the duct 16 and the edge of the opening 14. This is therefore an operation that does not present no difficulty and which does not require any particular skill.

    Claims (4)

    Dispositif de transport séquentiel des feuilles dans une presse à platines comprenant des barres de pinces (4) dont les extrémités respectives sont solidaires de deux éléments souples (1) en forme de boucles sans fins, chacun en prise respectivement avec une roue (2) à entraínement intermittent et au moins une roue libre (2a), un châssis de travail quadrangulaire (5) et un sommier mobile (6) disposés de part et d'autre de la trajectoire des pinces (4a) de ladite barre (4) et des buses (11) reliées à une alimentation en air sous pression (S), pour diriger des jets d'air vers le sommier mobile (6) durant la phase d'arrêt de la barre de pinces (4), pour arrêter successivement lesdites feuilles (7) entre le châssis de travail (5) et le sommier mobile (6), caractérisé en ce que lesdites buses (11) sont situées au-dessous du bord transversal arrière (5a) dudit châssis de travail (5).A device for sequentially transporting sheets in a platen press comprising gripper bars (4) whose respective ends are secured to two flexible elements (1) in the form of endless loops, each respectively engaged with a wheel (2). intermittent drive and at least one free wheel (2a), a quadrangular working frame (5) and a movable bed (6) arranged on either side of the path of the clamps (4a) of said bar (4) and nozzles (11) connected to a pressurized air supply (S), for directing air jets to the movable bed (6) during the stop phase of the gripper bar (4), to successively stop said sheets (7) between the working frame (5) and the movable bed (6), characterized in that said nozzles (11) are located below the rear transverse edge (5a) of said working frame (5). Dispositif selon la revendication 1, dans lequel ledit bord transversal arrière (5a) du châssis de travail (5) est traversé d'une pluralité de conduits verticaux (10) dont les extrémités inférieures fermées comportent au moins une ouverture latérale de formation d'une buse (11), ces conduits (10) étant répartis transversalement entre les pinces (4a) de la barre de pinces (4).Device according to claim 1, wherein said rear transverse edge (5a) of the work frame (5) is traversed by a plurality of vertical ducts (10) whose closed lower extremities contain at least a lateral opening for forming a nozzle (11), these conduits (10) being distributed transversely between the clamps (4a) of the gripper bar (4). Dispositif selon la revendication 2, dans lequel les extrémités supérieures desdits conduits verticaux (10) sont solidaires d'un canal de distribution (12) disposé sur ledit bord transversal arrière (5a) du châssis de travail (5) pour relier lesdits conduits verticaux (10) à ladite source d'air sous pression (S).Device according to claim 2, wherein the upper ends of said vertical ducts (10) are integral with a distribution channel (12) disposed on said rear transverse edge (5a) of the working frame (5) for connecting said vertical ducts (10) to said air source under pressure (S). Dispositif selon la revendication 3, dans lequel ledit canal de distribution (12) présente une ouverture de liaison (14) traversant sa face supérieure et dans lequel ledit châssis de travail (5) est relié à un conduit d'alimentation vertical (16), monté coulissant par rapport à au châssis de travail (5), à l'encontre de la pression d'un ressort de rappel (22) tendant à presser ledit conduit en direction dudit canal de distribution (12), un joint d'étanchéité (15) étant disposé entre l'extrémité inférieure dudit conduit d'alimentation (16) et ladite ouverture de liaison (14).Device according to claim 3, wherein said distribution channel (12) has an opening of link (14) passing through its upper face and in which said work frame (5) is connected to a feed duct vertically (16), slidably mounted relative to working frame (5), against the pressure of a return spring (22) tending to press said conduit into direction of said distribution channel (12), a seal (15) being disposed between the lower end of said supply duct (16) and said connecting opening (14).
    EP04405281A 2004-05-05 2004-05-05 Device for the sequencial transport of sheets in a platen press Active EP1593468B1 (en)

    Priority Applications (3)

    Application Number Priority Date Filing Date Title
    EP04405281A EP1593468B1 (en) 2004-05-05 2004-05-05 Device for the sequencial transport of sheets in a platen press
    AT04405281T ATE347472T1 (en) 2004-05-05 2004-05-05 DEVICE FOR SEQUENTIALLY CONVEYING SHEETS IN A CRAFT PRESS
    DE602004003561T DE602004003561T2 (en) 2004-05-05 2004-05-05 Apparatus for sequentially conveying sheets in a crucible press

    Applications Claiming Priority (1)

    Application Number Priority Date Filing Date Title
    EP04405281A EP1593468B1 (en) 2004-05-05 2004-05-05 Device for the sequencial transport of sheets in a platen press

    Publications (2)

    Publication Number Publication Date
    EP1593468A1 true EP1593468A1 (en) 2005-11-09
    EP1593468B1 EP1593468B1 (en) 2006-12-06

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    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP04405281A Active EP1593468B1 (en) 2004-05-05 2004-05-05 Device for the sequencial transport of sheets in a platen press

    Country Status (3)

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    EP (1) EP1593468B1 (en)
    AT (1) ATE347472T1 (en)
    DE (1) DE602004003561T2 (en)

    Cited By (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    WO2011160816A1 (en) * 2010-06-23 2011-12-29 Bobst Sa Supporting device for a workstation of a profiling machine

    Citations (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE888505C (en) * 1939-02-27 1953-09-03 Bobst & Sohn A G J Crucible press for processing cardboard sheets

    Patent Citations (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE888505C (en) * 1939-02-27 1953-09-03 Bobst & Sohn A G J Crucible press for processing cardboard sheets

    Cited By (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    WO2011160816A1 (en) * 2010-06-23 2011-12-29 Bobst Sa Supporting device for a workstation of a profiling machine
    US10058981B2 (en) 2010-06-23 2018-08-28 Bobst Mex Sa Holding device for a sheet at a work station of a converting machine

    Also Published As

    Publication number Publication date
    DE602004003561D1 (en) 2007-01-18
    EP1593468B1 (en) 2006-12-06
    DE602004003561T2 (en) 2007-09-20
    ATE347472T1 (en) 2006-12-15

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