EP0681975A1 - Device for braking sheet elements in a out-feed station of a machine for processing such elements - Google Patents

Device for braking sheet elements in a out-feed station of a machine for processing such elements Download PDF

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Publication number
EP0681975A1
EP0681975A1 EP95106871A EP95106871A EP0681975A1 EP 0681975 A1 EP0681975 A1 EP 0681975A1 EP 95106871 A EP95106871 A EP 95106871A EP 95106871 A EP95106871 A EP 95106871A EP 0681975 A1 EP0681975 A1 EP 0681975A1
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EP
European Patent Office
Prior art keywords
brush
oblique
ramp
axis
rotation
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
EP95106871A
Other languages
German (de)
French (fr)
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EP0681975B1 (en
Inventor
Jean-Claude Rebeaud
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Bobst Mex SA
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Bobst SA
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Publication date
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Publication of EP0681975A1 publication Critical patent/EP0681975A1/en
Application granted granted Critical
Publication of EP0681975B1 publication Critical patent/EP0681975B1/en
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
    • B65H20/00—Advancing webs
    • B65H20/16—Advancing webs by web-gripping means, e.g. grippers, clips
    • 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
    • B65H29/68—Reducing the speed of articles as they advance
    • B65H29/683—Slowing-down from chain delivery
    • 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
    • B65H2301/44—Moving, forwarding, guiding material
    • B65H2301/449—Features of movement or transforming movement of handled material
    • B65H2301/4492—Features of movement or transforming movement of handled material braking
    • B65H2301/44921—Features of movement or transforming movement of handled material braking by friction contact with non driven element
    • 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
    • B65H2404/50—Surface of the elements in contact with the forwarded or guided material
    • B65H2404/56—Flexible surface
    • B65H2404/561—Bristles, brushes
    • 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
    • B65H2404/63—Oscillating, pivoting around an axis parallel to face of material, e.g. diverting 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
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10—Size; Dimensions
    • B65H2511/11—Length
    • 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

Definitions

  • the present invention relates to a device for braking plate elements, such as sheets of paper or cardboard, within a receiving station of a machine for processing such elements.
  • Such a machine usually comprises first of all an introduction station in which a stack of sheets is installed, each sheet being successively removed from the top of the stack to be sent to a margin table.
  • each sheet On this table, each sheet is placed in position against front and side cleats before being gripped at its front edge by a series of pliers mounted along a transverse bar, each end of which is attached to a train of side chains taking the bar, and therefore the sheet, to the following treatment stations.
  • the treatment stations can be a cutting press, the latter being followed by a waste ejection station.
  • These processing stations are followed by a receiving station in which each sheet released by the clamps is jogged by falling on top of a stack accumulating on an output pallet.
  • the sheet is first supported when it arrives in the station by a rear shelf and possibly two side shelves, which then retract to drop it.
  • this sheet weakened by the anterior cut entering the station at high speed, the only braking by deceleration of the front gripper bar may cause curling of its rear part which tends to catch up with the front part.
  • This sheet must therefore also be braked by a complementary device acting on its surface.
  • a known braking device is composed of a long transverse brush oriented downwards rubbing the sheet against the rear shelf, which keeps it smooth as it passes.
  • This brush must however be regularly lifted to prevent it from being damaged by shocks due to the successive passages of the gripper bars.
  • the brush is mounted on an oblique cross member oriented downstream, as seen relative to the direction of movement of a sheet, a cross member whose two ends are pivotally mounted about an axis located substantially at their upper edge.
  • An elastic means such as one or more spiral springs mounted on the axis or located inside a meshed drum with a plate in the form of a circular sector and integral with the axis, keep this crosspiece at rest, so the brush, in the high position.
  • the brush is put into service by imposing a rotation in the opposite direction by pressing down on an oblique lateral upper arm also secured to the axis.
  • the support force of the brush is preferably adjusted as a function of the fragility of the sheet due to its cutting. This force can be modulated either by playing on the stiffness of the bristles, possibly supplemented by the action of a support blade; either in the final position more or less low of the brush relative to the plane of passage of the sheet.
  • the axis of the crosspiece of the braking brush is mounted on each side in a horizontal lateral slide of the station to allow to manually reposition it always above this rear shelf.
  • the support means on the upper arm of the lever then consists of a horizontal ramp driven by a vertical orthogonal translation movement, this ramp extending over the entire adjustment range of the tablet and the brush.
  • the object of the present invention is a braking device within a receiving station of a plate element processing machine, the positioning of which according to the format and the deactivation for small formats does not require practically more additional manual intervention.
  • a braking device comprising an oblique transverse brush oriented downwards and the downstream pivotally mounted about an axis located substantially at its upper edge, this brush being alternately lifted in rotation by elastic means during the passage of a clamp bar and lowered during the passage of a sheet by the vertical descent of a horizontal ramp acting on the upper end of an oblique arm oriented upwards and downstream secured to the axis of rotation of the brush to press this brush against a rear shelf mounted in a chassis movable longitudinally in the station, because the downstream part of the ramp is oblique oriented upwards.
  • the lowering of the brush remains constant for long formats, then decreases as this brush is advanced from a medium format to a short format, which reduces its force d 'support.
  • the brush reaches the downstream end of the ramp, therefore for small formats, it remains permanently in the raised position out of service, the too high end of the ramp can no longer act on its lowering arm.
  • the oblique part of the ramp can be linear, or in an arc or follow a sinusoidal or logarithmic curve depending on the desired relationship between the length of the format and the force of the brush.
  • the oblique portion of the ramp is held, mobile in rotation, between the downstream end of the straight portion of the ramp and the upper end of a vertical support rod, the other end is movable in rotation on an axis.
  • the effect of the oblique part can be readjusted according to the dimensions of this rod.
  • the axis of the brush is held in the same chassis as that of the tablet. Then, the movement of the tablet causes that of the brush which automatically always remains in coincidence.
  • upstream and downstream are to be considered in relation to the direction of movement of the sheet: an upstream part being oriented towards the station entrance on the right of the figure, while a part downstream is oriented to the left of this figure.
  • a sheet of paper or cardboard arriving in the X-X plane is pressed by a transverse brush 10 against the rear shelf 54 thus inducing braking friction forces.
  • This rear shelf 54 is retractable inside a structure providing a housing 55, the downstream part of this structure constituting the rear squaring cleat 56.
  • the position of this structure must be modified so that the rear shelf 54 and the squaring cleat 56 are found at the upstream edge of the sheet once it is stopped ready to be released on the above of the output stack. Therefore, this structure is held on either side in a movable frame 50 along a slide 51, and this to an extreme position 52 corresponding to the shortest format acceptable in the machine.
  • the oblique brush 10 oriented downwards and downstream, is fixed along a cross member 11 parallel and offset upwards.
  • a support blade 12 is inserted between the cross member 11 and the brush to press the end of the bristles to increase their stiffness.
  • Fixing means such as bolts 13 regularly spaced along the cross-member 11, make it possible to modulate the effect of the support blade 12. If desired, these fixings 13 also make it possible to offset the brush 10 more or less high by compared to the cross member 11 therefore to modify at will the final dimension of the end of the bristles of the brush when the latter is in the lowered position as illustrated in the figure.
  • This cross member 11 is carried by a through axis 20 which, more particularly according to the invention, is fixed at its two ends to the same movable frame 50 as that of the shelf 54.
  • This axis 20 can also be replaced by two half-axes present only at the ends of the crosspiece.
  • the brush 10 can be raised or lowered in a rotational movement around this axis 20.
  • Elastic means 22 maintain, at rest, the brush 10 in the raised position.
  • these means 22 may comprise a plate integral with the axis 20 having a lower edge in the form of a toothed circular section meshed with a drum containing a spiral spring whose external end is connected to the drum and the internal end to a central axis of rotation.
  • the axis 20 is also connected, at one of its ends, to an oblique arm 24 oriented upwards and downstream carrying at its end a roller 25 bearing against a horizontal ramp 40.
  • a descent in vertical translation of this ramp 40 induces a rotation of the brush 10 about its axis 20 which lowers it in the braking position.
  • This ramp being first horizontal, it always remains in contact with the roller 25 of the oblique arm 24 even though the brush 10 is advanced or moved back depending on the format of the sheet.
  • the horizontal ramp 40 is shorter than usual so as to be completed by a second oblique ramp 42 oriented upwards and downstream.
  • This oblique ramp is held at its two ends by axes of rotation, upstream at the end of the horizontal ramp 40 and downstream at the upper end of a vertical support rod 44 itself movable around a horizontal axis 45.
  • the ramp 40 is itself held by two lateral fasteners 76 belonging to the vertical movement control device.
  • the device for controlling the vertical movement of the ramp 40 first comprises a cam 60 connected to the general drive of the machine and the position of which is read by the roller located at the end of the first branch of a lever. reading 62.
  • the other branch of the lever located opposite the first with respect to the point of rotation, is itself connected to a pull rod 64 acting on a rotation bar 66 actuating a horizontal axis 70 passing through the side wall of the receiving station through a bearing 72.
  • On this traversing axis 70 is mounted a first upstream angular lever 73 connected to a second downstream angular lever 74 by a synchronization pusher 75 fixed at its two ends in rotation to the respective upper branches.
  • the two lower branches of the levers 73 and 74 support, by rotational connections, the lateral fasteners 76 of the horizontal ramp 40.
  • the second lever 74 is itself also mounted on an axis held in the side wall of the station by a bearing.
  • a tension spring is also connected in its lower part to the horizontal ramp 40 and in its upper part to a fixed point of the station.
  • the device described above operates in the following manner.
  • the tension spring 78 can raise the ramp 40 which allows, simultaneously, a lifting of the brush 10.
  • the movable frame 50 is advanced or moved back so that the roller 25 remains in contact with the horizontal ramp 40, that is to say for long formats, the extent of the lowering of the brush 10 remains constant.
  • the corresponding advancement of the movable frame 50 means that the roller 25 begins to bear on the beginning of the oblique ramp 42. Then, the geometry of the cam 60 remaining constant, the support of the roller from an initially higher point causes the brush to come into contact with the sheet for a shorter period and this with a lower low point. The duration and intensity of braking are then automatically reduced for such a medium format. These braking duration and intensity are reduced as the movable chassis 50 is advanced as a function of the corresponding shorter format. In the extreme, when the chassis 50 is in its final position 52, the rotation of the brush 10 around the axis 20 is practically canceled, the roller 25 remaining under the support rod 44 of constant height. This braking was therefore purely and simply canceled for short formats.
  • the adjustment of the braking device according to the invention as a function of the format is done automatically by the simple adjustment of the rear shelf 54 due to the movement of the movable chassis 50 along its slide 51.
  • this movement of the chassis is motorized, the implementation of the reception station takes place particularly quickly even by unskilled persons.

Abstract

The braking unit consists of a transverse oblique brush (10) pointing downwards and forwards and alternately raised and lowered by elastic elements (22) during the passage of a clamp bar; the lowering action being produced by a horizontal bar (40) acting on the upper end of an oblique arm connected to the brush's axis of rotation. On the downward movement the bush is pressed against a rear panel (54) by an obliquely-positioned front section (42) of the bar. The oblique section of the bar can be straight or curved in shape, while the brush's axle (22) is held in the same frame (50) as the panel. <IMAGE>

Description

La présente invention est relative à un dispositif de freinage d'éléments en plaque, tels que des feuilles de papier ou de carton, au sein d'une station de réception d'une machine de traitement de tels éléments.The present invention relates to a device for braking plate elements, such as sheets of paper or cardboard, within a receiving station of a machine for processing such elements.

Une telle machine comprend usuellement d'abord une station d'introduction dans laquelle est installée une pile de feuilles, chaque feuille étant successivement enlevée du dessus de la pile pour être envoyée sur une table de marge. Sur cette table, chaque feuille est mise en position contre des taquets avant et latéraux avant d'être saisie en son bord frontal par une série de pinces montées le long d'une barre transversale, dont chaque extrémité est attachée à un train de chaînes latérales emmenant la barre, donc la feuille, dans les stations suivantes de traitement. Les stations de traitement peuvent être une presse de découpage, cette dernière étant suivie d'une station d'éjection des déchets. Ces stations de traitement sont suivies d'une station de réception dans laquelle chaque feuille relâchée par les pinces est taquée en tombant sur le dessus d'une pile s'accumulant sur une palette de sortie.Such a machine usually comprises first of all an introduction station in which a stack of sheets is installed, each sheet being successively removed from the top of the stack to be sent to a margin table. On this table, each sheet is placed in position against front and side cleats before being gripped at its front edge by a series of pliers mounted along a transverse bar, each end of which is attached to a train of side chains taking the bar, and therefore the sheet, to the following treatment stations. The treatment stations can be a cutting press, the latter being followed by a waste ejection station. These processing stations are followed by a receiving station in which each sheet released by the clamps is jogged by falling on top of a stack accumulating on an output pallet.

Pour assurer une chute uni forme de la feuille avec un taquage correct, il convient que celle-ci soit aussi plane que possible une fois à l'arrêt au moment de l'ouverture des pinces. Pour ce, la feuille est d'abord soutenue lors de son arrivée dans la station par une tablette arrière et éventuellement deux tablettes latérales, qui se rétractent par la suite pour la laisser tomber.To ensure a uniform fall of the sheet with a correct jogging, it should be as flat as possible once stopped when opening the clamps. For this, the sheet is first supported when it arrives in the station by a rear shelf and possibly two side shelves, which then retract to drop it.

Par ailleurs, cette feuille fragilisée par la découpe antérieure entrant dans la station à grande vitesse, le seul freinage par décélération de la barre de pinces frontale risque de provoquer un gondolement de sa partie arrière qui tend à rattraper la partie frontale. Cette feuille doit donc être également freinée par un dispositif complémentaire agissant sur sa surface.Furthermore, this sheet weakened by the anterior cut entering the station at high speed, the only braking by deceleration of the front gripper bar may cause curling of its rear part which tends to catch up with the front part. This sheet must therefore also be braked by a complementary device acting on its surface.

Un dispositif de freinage connu est composé d'une longue brosse transversale orientée vers le bas frottant la feuille contre la tablette arrière, ce qui la maintient lisse au fur et à mesure de son passage.A known braking device is composed of a long transverse brush oriented downwards rubbing the sheet against the rear shelf, which keeps it smooth as it passes.

Cette brosse doit toutefois être régulièrement levée afin d'éviter qu'elle ne soit détériorée par des chocs dus aux passages successifs des barres de pinces.This brush must however be regularly lifted to prevent it from being damaged by shocks due to the successive passages of the gripper bars.

La brosse est montée sur une traverse oblique orientée vers l'aval, tel que vu par rapport au sens de déplacement d'une feuille, traverse dont les deux extrémités sont montées en pivotement autour d'un axe situé sensiblement en leur bord supérieur. Un moyen élastique, tel qu'un ou plusieurs ressorts en spirale montés sur l'axe ou situés à l'intérieur d'un tambour engrené avec une plaque en forme de secteur circulaire et solidaire de l'axe, maintiennent au repos cette traverse, donc la brosse, en position haute. La mise en service de la brosse s'effectue alors en imposant une rotation en sens inverse par appui vers le bas sur un bras supérieur latéral oblique également solidaire de l'axe.The brush is mounted on an oblique cross member oriented downstream, as seen relative to the direction of movement of a sheet, a cross member whose two ends are pivotally mounted about an axis located substantially at their upper edge. An elastic means, such as one or more spiral springs mounted on the axis or located inside a meshed drum with a plate in the form of a circular sector and integral with the axis, keep this crosspiece at rest, so the brush, in the high position. The brush is put into service by imposing a rotation in the opposite direction by pressing down on an oblique lateral upper arm also secured to the axis.

La force d'appui de la brosse est, de préférence, réglée en fonction de la fragilité de la feuille due à sa découpe. Cette force peut être modulée soit en jouant sur la raideur des poils, éventuellement complétée par l'action d'une lame d'appui; soit sur la position finale plus ou moins basse de la brosse par rapport au plan de passage de la feuille.The support force of the brush is preferably adjusted as a function of the fragility of the sheet due to its cutting. This force can be modulated either by playing on the stiffness of the bristles, possibly supplemented by the action of a support blade; either in the final position more or less low of the brush relative to the plane of passage of the sheet.

Par ailleurs, la position de la tablette arrière devant être ajustée en fonction du format de la feuille pour une production donnée, l'axe de la traverse de la brosse de freinage est montée de chaque côté dans une glissière latérale horizontale de la station pour permettre de la repositionner manuellement toujours au dessus de cette tablette arrière. Le moyen d'appui sur la branche supérieure du levier est alors constitué d'une rampe horizontale animée d'un mouvement de translation orthogonal vertical, cette rampe s'étendant sur toute la plage de réglage de la tablette et de la brosse.Furthermore, the position of the rear shelf having to be adjusted according to the format of the sheet for a given production, the axis of the crosspiece of the braking brush is mounted on each side in a horizontal lateral slide of the station to allow to manually reposition it always above this rear shelf. The support means on the upper arm of the lever then consists of a horizontal ramp driven by a vertical orthogonal translation movement, this ramp extending over the entire adjustment range of the tablet and the brush.

Toutefois, il s'avère que ce freinage doit être réduit pour les formats moyens, soit en agissant sur la lame d'appui soit en modifiant la hauteur finale de la rampe, et devient même superflu pour les petits formats pour lesquels on doit alors mettre cette brosse manuellement hors service.However, it turns out that this braking must be reduced for medium formats, either by acting on the support blade or by modifying the final height of the ramp, and even becomes superfluous for small formats for which we must then put this brush manually out of service.

Ces réglages manuels longs et fastidieux de la brosse, en plus du réglage de la tablette arrière, sont désavantageux car ils augmentent d'autant les temps morts d'utilisation de la machine lors du passage d'une production à une autre selon un format différent.These long and tedious manual brush adjustments, in addition to adjusting the rear shelf, are disadvantageous because they increase the idle time of the machine by the same amount when switching from one production to another in a different format. .

Le but de la présente invention est un dispositif de freinage au sein d'une station de réception d'une machine de traitement d'éléments en plaque, dont la mise en position selon le format et la mise hors service pour de petits formats ne nécessitent pratiquement plus d'interventions manuelles supplémentaires.The object of the present invention is a braking device within a receiving station of a plate element processing machine, the positioning of which according to the format and the deactivation for small formats does not require practically more additional manual intervention.

Ce but est atteint dans un dispositif de freinage comprenant une brosse transversale oblique orientée vers le bas et l'aval montée en pivotement autour d'un axe situé sensiblement en son bord supérieur, cette brosse étant alternativement levée en rotation par des moyens élastiques lors du passage d'une barre de pinces et abaissée lors du passage d'une feuille par la descente verticale d'une rampe horizontale agissant sur l'extrémité supérieure d'un bras oblique orienté vers le haut et l'aval solidaire de l'axe de rotation de la brosse pour presser cette brosse contre une tablette arrière montée dans un châssis déplacable longitudinalement dans la station, du fait que la partie aval de la rampe est oblique orientée vers le haut.This object is achieved in a braking device comprising an oblique transverse brush oriented downwards and the downstream pivotally mounted about an axis located substantially at its upper edge, this brush being alternately lifted in rotation by elastic means during the passage of a clamp bar and lowered during the passage of a sheet by the vertical descent of a horizontal ramp acting on the upper end of an oblique arm oriented upwards and downstream secured to the axis of rotation of the brush to press this brush against a rear shelf mounted in a chassis movable longitudinally in the station, because the downstream part of the ramp is oblique oriented upwards.

Grâce à cet agencement, l'abaissement de la brosse reste constant pour les formats longs, puis diminue au fur et à mesure qu'on avance cette brosse d'un format moyen à un format court, ce qui réduit d'autant sa force d'appui. De plus, lorsque la brosse atteint l'extrémité aval de la rampe, donc pour des petits formats, elle reste en permanence en position levée hors service, l'extrémité trop haute de la rampe ne pouvant plus agir sur son bras d'abaissement.Thanks to this arrangement, the lowering of the brush remains constant for long formats, then decreases as this brush is advanced from a medium format to a short format, which reduces its force d 'support. In addition, when the brush reaches the downstream end of the ramp, therefore for small formats, it remains permanently in the raised position out of service, the too high end of the ramp can no longer act on its lowering arm.

Utilement, la partie oblique de la rampe peut être linéaire, ou en arc de cercle ou suivre une courbe sinusoïdale ou logarithmique selon la relation désirée entre la longueur du format et la force d'appui de la brosse.Usefully, the oblique part of the ramp can be linear, or in an arc or follow a sinusoidal or logarithmic curve depending on the desired relationship between the length of the format and the force of the brush.

Avantageusement, la partie oblique de la rampe est tenue, mobile en rotation, entre l'extrémité aval de la partie rectiligne de la rampe et l'extrémité supérieure d'une tige de support verticale dont l'autre extrémité est mobile en rotation sur un axe. Outre le fait que le bras d'abaissement de la brosse ne peut plus quitter la rampe, l'effet de la partie oblique peut être réajusté selon les dimensions de cette tige.Advantageously, the oblique portion of the ramp is held, mobile in rotation, between the downstream end of the straight portion of the ramp and the upper end of a vertical support rod, the other end is movable in rotation on an axis. In addition to the fact that the lowering arm of the brush can no longer leave the ramp, the effect of the oblique part can be readjusted according to the dimensions of this rod.

Avantageusement, l'axe de la brosse est tenu dans le même châssis que celui de la tablette. Alors, le déplacement de la tablette entraîne celui de la brosse qui reste automatiquement toujours en coïncidence.Advantageously, the axis of the brush is held in the same chassis as that of the tablet. Then, the movement of the tablet causes that of the brush which automatically always remains in coincidence.

L'invention sera mieux comprise à l'étude d'un mode de réalisation pris à titre d'exemple nullement limitatif et illustré, vu de côté, sur la figure unique annexée.The invention will be better understood from the study of an embodiment taken by way of nonlimiting example and illustrated, seen from the side, in the single appended figure.

Pour une meilleure compréhension de cette description, les termes amont et aval sont à considérer par rapport au sens de déplacement de la feuille : une partie amont étant orientée vers l'entrée de la station sur la droite de la figure, alors qu'une partie aval est orientée vers la gauche de cette figure.For a better understanding of this description, the terms upstream and downstream are to be considered in relation to the direction of movement of the sheet: an upstream part being oriented towards the station entrance on the right of the figure, while a part downstream is oriented to the left of this figure.

Comme illustré, une feuille de papier ou de carton arrivant dans le plan X-X est pressée par une brosse transversale 10 contre la tablette arrière 54 induisant ainsi des forces de friction de freinage.As illustrated, a sheet of paper or cardboard arriving in the X-X plane is pressed by a transverse brush 10 against the rear shelf 54 thus inducing braking friction forces.

Cette tablette arrière 54 est rétractable à l'intérieur d'une structure ménageant un logement 55, la partie aval de cette structure constituant le taquet d'équerrage arrière 56. Lors du passage à une production d'éléments en plaque selon un format différent du précédent, la position de cette structure doit être modifiée de telle sorte que la tablette arrière 54 et le taquet d'équerrage 56 se retrouvent au niveau du bord amont de la feuille une fois celle-ci à l'arrêt prête à être lâchée sur le dessus de la pile de sortie. De ce fait, cette structure est tenue de part et d'autre dans un châssis mobile 50 le long d'une glissière 51, et ce jusqu'à une position extrême 52 correspondant au format le plus court acceptable dans la machine.This rear shelf 54 is retractable inside a structure providing a housing 55, the downstream part of this structure constituting the rear squaring cleat 56. When switching to a production of plate elements in a format different from the previous, the position of this structure must be modified so that the rear shelf 54 and the squaring cleat 56 are found at the upstream edge of the sheet once it is stopped ready to be released on the above of the output stack. Therefore, this structure is held on either side in a movable frame 50 along a slide 51, and this to an extreme position 52 corresponding to the shortest format acceptable in the machine.

Par ailleurs, la brosse 10 oblique orientée vers le bas et l'aval, est fixée le long d'une traverse 11 parallèle et décalée vers le haut. Si désiré, une lame d'appui 12 est insérée entre la traverse 11 et la brosse pour appuyer sur l'extrémité des poils afin d'augmenter leur raideur. Des moyens de fixation tels que des boulons 13 régulièrement espacés le long de la traverse 11, permettent de moduler l'effet de la lame d'appui 12. Si désiré, ces fixations 13 permettent également de décaler plus ou moins haut la brosse 10 par rapport à la traverse 11 donc de modifier à volonté la cote finale de l'extrémité des poils de la brosse lorsque celle-ci est en position abaissée tel qu'illustré sur la figure.Furthermore, the oblique brush 10 oriented downwards and downstream, is fixed along a cross member 11 parallel and offset upwards. If desired, a support blade 12 is inserted between the cross member 11 and the brush to press the end of the bristles to increase their stiffness. Fixing means such as bolts 13 regularly spaced along the cross-member 11, make it possible to modulate the effect of the support blade 12. If desired, these fixings 13 also make it possible to offset the brush 10 more or less high by compared to the cross member 11 therefore to modify at will the final dimension of the end of the bristles of the brush when the latter is in the lowered position as illustrated in the figure.

Cette traverse 11 est portée par un axe traversant 20 qui, plus particulièrement selon l'invention, est fixé en ses deux extrémités au même châssis mobile 50 que celui de la tablette 54. Cette axe 20 peut également être remplacé par deux demi-axes présents uniquement aux extrémités de la traverse. Ainsi, la brosse 10 peut être levée ou abaissée dans un mouvement de rotation autour de cet axe 20.This cross member 11 is carried by a through axis 20 which, more particularly according to the invention, is fixed at its two ends to the same movable frame 50 as that of the shelf 54. This axis 20 can also be replaced by two half-axes present only at the ends of the crosspiece. Thus, the brush 10 can be raised or lowered in a rotational movement around this axis 20.

Des moyens élastiques 22 maintiennent, au repos, la brosse 10 en position levée. Par exemple, ces moyens 22 peuvent comprendre une plaque solidaire de l'axe 20 présentant un bord inférieur en forme de section circulaire denté engrené avec un tambour contenant un ressort en spirale dont l'extrémité externe est reliée au tambour et l'extrémité interne à un axe central de rotation.Elastic means 22 maintain, at rest, the brush 10 in the raised position. For example, these means 22 may comprise a plate integral with the axis 20 having a lower edge in the form of a toothed circular section meshed with a drum containing a spiral spring whose external end is connected to the drum and the internal end to a central axis of rotation.

L'axe 20 est de plus relié, en l'une de ses extrémités, à un bras oblique 24 orienté vers le haut et l'aval portant en son extrémité un galet 25 prenant appui contre une rampe horizontale 40. Ainsi, une descente en translation verticale de cette rampe 40 induit une rotation de la brosse 10 autour de son axe 20 qui l'abaisse en position de freinage. Cette rampe étant d'abord horizontale, elle reste toujours en contact avec le galet 25 du bras oblique 24 quand bien même la brosse 10 est avancée ou reculée en fonction du format de la feuille.The axis 20 is also connected, at one of its ends, to an oblique arm 24 oriented upwards and downstream carrying at its end a roller 25 bearing against a horizontal ramp 40. Thus, a descent in vertical translation of this ramp 40 induces a rotation of the brush 10 about its axis 20 which lowers it in the braking position. This ramp being first horizontal, it always remains in contact with the roller 25 of the oblique arm 24 even though the brush 10 is advanced or moved back depending on the format of the sheet.

Plus particulièrement selon l'invention, la rampe horizontale 40 est plus courte qu'usuellement de telle sorte à être complétée par une seconde rampe oblique 42 orientée vers le haut et l'aval. Cette rampe oblique est tenue en ses deux extrémités par des axes de rotation, en amont à l'extrémité de la rampe horizontale 40 et en aval à l'extrémité supérieure d'une tige de support 44 verticale elle-même mobile autour d'un axe horizontal 45. La rampe 40 est elle-même tenue par deux attaches latérales 76 appartenant au dispositif de commande de mouvement vertical.More particularly according to the invention, the horizontal ramp 40 is shorter than usual so as to be completed by a second oblique ramp 42 oriented upwards and downstream. This oblique ramp is held at its two ends by axes of rotation, upstream at the end of the horizontal ramp 40 and downstream at the upper end of a vertical support rod 44 itself movable around a horizontal axis 45. The ramp 40 is itself held by two lateral fasteners 76 belonging to the vertical movement control device.

Le dispositif de commande du mouvement vertical de la rampe 40 comprend d'abord une came 60 reliée à l'entraînement général de la machine et dont la position est lue par le galet situé à l'extrémité de la première branche d'un levier de lecture 62. L'autre branche du levier, située à l'opposé du premier par rapport au point de rotation, est elle-même reliée à une tirette 64 agissant sur une barre de rotation 66 actionnant un axe horizontal 70 traversant la paroi latérale de la station de réception au-travers d'un palier 72. Sur cet axe traversant 70 est monté un premier levier angulaire amont 73 relié à un second levier angulaire aval 74 par un poussoir de synchronisation 75 fixé en ses deux extrémités en rotation aux branches supérieures respectives. Les deux branches inférieures des leviers 73 et 74 supportent, par des liaisons en rotation, les attaches latérales 76 de la rampe horizontale 40. Le second levier 74 est lui-même également monté sur un axe tenu dans la paroi latérale de la station par un palier.The device for controlling the vertical movement of the ramp 40 first comprises a cam 60 connected to the general drive of the machine and the position of which is read by the roller located at the end of the first branch of a lever. reading 62. The other branch of the lever, located opposite the first with respect to the point of rotation, is itself connected to a pull rod 64 acting on a rotation bar 66 actuating a horizontal axis 70 passing through the side wall of the receiving station through a bearing 72. On this traversing axis 70 is mounted a first upstream angular lever 73 connected to a second downstream angular lever 74 by a synchronization pusher 75 fixed at its two ends in rotation to the respective upper branches. The two lower branches of the levers 73 and 74 support, by rotational connections, the lateral fasteners 76 of the horizontal ramp 40. The second lever 74 is itself also mounted on an axis held in the side wall of the station by a bearing.

Un ressort de traction est par ailleurs relié en sa partie inférieure à la rampe horizontale 40 et en sa partie supérieure à un point fixe de la station.A tension spring is also connected in its lower part to the horizontal ramp 40 and in its upper part to a fixed point of the station.

Le dispositif décrit précédemment fonctionne de la manière suivante.The device described above operates in the following manner.

Lorsque la came 60 pousse le levier 62 en rotation dans le sens des aiguilles d'une montre, celui-ci abaisse la tirette 64 donc la barre 66 ce qui implique une rotation dans le sens inverse des aiguilles d'une montre simultanée des leviers angulaires 73 et 74. Cette rotation a pour conséquence un abaissement de l'attache inférieure 76 donc la descente en translation verticale de la rampe 40. Cette descente de la rampe induit une rotation en sens inverse des aiguilles d'une montre du bras oblique 24 et de la traverse 11, donc un abaissement de la brosse 10 en position de freinage de la feuille. Cette descente de la rampe 40 s'effectue contre l'effet du ressort 78 qui s'allonge.When the cam 60 pushes the lever 62 in rotation clockwise, the latter lowers the zipper 64 therefore the bar 66 which implies a rotation in the anti-clockwise direction of the angular levers 73 and 74. This rotation results in a lowering of the lower fastener 76 therefore the descent in vertical translation of the ramp 40. This descent of the ramp induces a counterclockwise rotation of the oblique arm 24 and of the cross member 11, therefore a lowering of the brush 10 in the sheet braking position. This descent of the ramp 40 takes place against the effect of the spring 78 which lengthens.

A l'inverse, lorsque le point haut de la came 60 s'éloigne du levier de lecture 62, le ressort de traction 78 peut relever la rampe 40 ce qui autorise, simultanément, une levée de la brosse 10. Tant que le châssis mobile 50 est avancé ou reculé de telle sorte que le galet 25 reste en contact avec la rampe horizontale 40, soit pour des formats longs, l'ampleur de l'abaissement de la brosse 10 reste constante.Conversely, when the high point of the cam 60 moves away from the reading lever 62, the tension spring 78 can raise the ramp 40 which allows, simultaneously, a lifting of the brush 10. As long as the movable frame 50 is advanced or moved back so that the roller 25 remains in contact with the horizontal ramp 40, that is to say for long formats, the extent of the lowering of the brush 10 remains constant.

Par contre, et plus particulièrement selon l'invention, dès que la longueur du format devient moyenne, l'avancement en correspondance du châssis mobile 50 fait que le galet 25 commence à prendre appui sur le début de la rampe oblique 42. Alors, la géométrie de la came 60 restant constante, l'appui du galet à partir d'un point initialement plus haut fait que la brosse entre en contact avec la feuille pendant une période plus courte et ce avec un point bas moindre. La durée et l'intensité du freinage sont alors automatiquement diminuées pour un tel format moyen. Ces durée et intensité de freinage sont réduites au fur et à mesure que le châssis mobile 50 est avancé en fonction du format plus court correspondant. A l'extrême, lorsque le châssis 50 se retrouve en sa position ultime 52, la rotation de la brosse 10 autour de l'axe 20 est pratiquement annulée, le galet 25 restant sous la tige-support 44 de hauteur constante. Ce freinage a donc été purement et simplement annulé pour les formats courts.On the other hand, and more particularly according to the invention, as soon as the length of the format becomes medium, the corresponding advancement of the movable frame 50 means that the roller 25 begins to bear on the beginning of the oblique ramp 42. Then, the geometry of the cam 60 remaining constant, the support of the roller from an initially higher point causes the brush to come into contact with the sheet for a shorter period and this with a lower low point. The duration and intensity of braking are then automatically reduced for such a medium format. These braking duration and intensity are reduced as the movable chassis 50 is advanced as a function of the corresponding shorter format. In the extreme, when the chassis 50 is in its final position 52, the rotation of the brush 10 around the axis 20 is practically canceled, the roller 25 remaining under the support rod 44 of constant height. This braking was therefore purely and simply canceled for short formats.

Comme on a pu le constater à la lecture de cet exposé, le réglage du dispositif de freinage selon l'invention en fonction du format se fait automatiquement par le simple réglage de la tablette arrière 54 dû au déplacement du châssis mobile 50 le long de sa glissière 51. Lorsque ce déplacement de châssis est motorisé, la mise en oeuvre de la station de réception s'effectue particulièrement rapidement même par des personnes peu qualifiées.As we have seen on reading this presentation, the adjustment of the braking device according to the invention as a function of the format is done automatically by the simple adjustment of the rear shelf 54 due to the movement of the movable chassis 50 along its slide 51. When this movement of the chassis is motorized, the implementation of the reception station takes place particularly quickly even by unskilled persons.

De nombreuses améliorations peuvent être apportées à ce dispositif de freinage dans le cadre des revendications.Many improvements can be made to this braking device within the scope of the claims.

Claims (5)

Dispositif de freinage au sein d'une station de réception d'une machine de traitement d'éléments en plaque, ce dispositif comprenant une brosse transversale oblique (10) orientée vers le bas et l'aval montée en pivotement autour d'un axe (20) situé sensiblement en son bord supérieur, cette brosse étant alternativement levée en rotation par des moyens élastiques (22) lors du passage d'une barre de pinces et abaissée lors du passage d'une feuille par la descente verticale d'une rampe horizontale (40) agissant sur l'extrémité supérieure d'un bras oblique (24) orienté vers le haut et l'aval solidaire de l'axe de rotation (20) de la brosse pour presser celle-ci contre une tablette arrière (54) montée dans un châssis (50) déplacable longitudinalement dans la station, du fait que la partie aval (42) de la rampe est oblique orientée vers le haut.Braking device within a receiving station of a plate element processing machine, this device comprising an oblique transverse brush (10) oriented downwards and the downstream pivotally mounted about an axis ( 20) located substantially at its upper edge, this brush being alternately lifted in rotation by elastic means (22) during the passage of a clamp bar and lowered during the passage of a sheet by the vertical descent of a horizontal ramp (40) acting on the upper end of an oblique arm (24) oriented upwards and downstream secured to the axis of rotation (20) of the brush to press it against a rear shelf (54) mounted in a chassis (50) movable longitudinally in the station, because the downstream part (42) of the ramp is oblique oriented upwards. Dispositif de freinage selon la revendication 1, caractérisé en ce que la partie oblique (42) est linéaire.Braking device according to claim 1, characterized in that the oblique part (42) is linear. Dispositif de freinage selon la revendication 1, caractérisé en ce que la partie oblique (42) est en arc de cercle.Braking device according to claim 1, characterized in that the oblique part (42) is in an arc. Dispositif de freinage selon la revendication 1, caractérisé en ce que la partie oblique (42) de la rampe est tenue, mobile en rotation, entre l'extrémité aval de la partie rectiligne (40) de la rampe et l'extrémité supérieure d'une tige de support verticale (44) dont l'autre extrémité est mobile en rotation sur un axe (45).Braking device according to claim 1, characterized in that the oblique part (42) of the ramp is held, mobile in rotation, between the downstream end of the straight part (40) of the ramp and the upper end of a vertical support rod (44), the other end of which is movable in rotation on an axis (45). Dispositif de freinage selon la revendication 1, caractérisé en ce que l'axe (20) de la brosse (10) est tenu dans le même châssis (50) que celui de la tablette (54).Braking device according to claim 1, characterized in that the axis (20) of the brush (10) is held in the same frame (50) as that of the tablet (54).
EP95106871A 1994-05-11 1995-05-06 Device for braking sheet elements in a out-feed station of a machine for processing such elements Expired - Lifetime EP0681975B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH01477/94A CH689977A5 (en) 1994-05-11 1994-05-11 Braking device of plate elements in a receiving station of a processing machine such elements.
CH1477/94 1994-05-11

Publications (2)

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EP0681975A1 true EP0681975A1 (en) 1995-11-15
EP0681975B1 EP0681975B1 (en) 1997-08-06

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EP95106871A Expired - Lifetime EP0681975B1 (en) 1994-05-11 1995-05-06 Device for braking sheet elements in a out-feed station of a machine for processing such elements

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US (1) US5599012A (en)
EP (1) EP0681975B1 (en)
JP (1) JP2670432B2 (en)
KR (1) KR0156618B1 (en)
CN (1) CN1060450C (en)
CH (1) CH689977A5 (en)
DE (1) DE69500514T2 (en)
ES (1) ES2105810T3 (en)
TW (1) TW348573U (en)

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EP2107022A1 (en) * 2008-04-01 2009-10-07 Bobst Sa Braking system for a machine for working elements in sheets
US8079587B2 (en) 2008-02-25 2011-12-20 Heidelberger Druckmaschinen Aktiengesellschaft Sheet braking mechanism

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US5992844A (en) * 1997-12-19 1999-11-30 Marquip, Inc. Sheet deceleration device using pultruded bristle brushes
US6145833A (en) * 1998-06-02 2000-11-14 Marquip, Inc. Rotary brush sheet deceleration device
CH693989A5 (en) 2000-05-12 2004-05-28 Bobst Sa Braking device of a work machine of sheet members.
FR2918048B1 (en) * 2007-06-28 2011-05-20 Goss Int Montataire Sa DEVICE FOR BRAKING FLAT PRODUCTS AND CORRESPONDING BENDER.
DE102010011689A1 (en) 2010-03-17 2011-09-22 Heidelberger Druckmaschinen Ag Sheet braking device in the Nutzentrennstation
DE102013001778A1 (en) * 2013-01-31 2014-07-31 Heidelberger Druckmaschinen Ag Monitoring method for collision avoidance of a punching machine with brake brush
CN109677984A (en) * 2019-01-16 2019-04-26 王桂芳 A kind of rotational speed-reducing device in folding machine

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EP1882657A2 (en) * 2006-07-26 2008-01-30 Heidelberger Druckmaschinen Aktiengesellschaft Braking system for sheets
EP1882657A3 (en) * 2006-07-26 2009-07-01 Heidelberger Druckmaschinen Aktiengesellschaft Braking system for sheets
US7735824B2 (en) 2006-07-26 2010-06-15 Heidelberger Druckmaschinen Aktiengesellschaft Back-edge braking system
US8079587B2 (en) 2008-02-25 2011-12-20 Heidelberger Druckmaschinen Aktiengesellschaft Sheet braking mechanism
EP2107022A1 (en) * 2008-04-01 2009-10-07 Bobst Sa Braking system for a machine for working elements in sheets
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Also Published As

Publication number Publication date
CN1117466A (en) 1996-02-28
EP0681975B1 (en) 1997-08-06
TW348573U (en) 1998-12-21
KR0156618B1 (en) 1999-02-18
CH689977A5 (en) 2000-02-29
JP2670432B2 (en) 1997-10-29
DE69500514D1 (en) 1997-09-11
ES2105810T3 (en) 1997-10-16
CN1060450C (en) 2001-01-10
KR950031838A (en) 1995-12-20
JPH07315660A (en) 1995-12-05
US5599012A (en) 1997-02-04
DE69500514T2 (en) 1998-01-29

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