EP0305230B1 - Intermittent web feed for a machine, particularly a sheet cut-off press - Google Patents

Intermittent web feed for a machine, particularly a sheet cut-off press Download PDF

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Publication number
EP0305230B1
EP0305230B1 EP88401817A EP88401817A EP0305230B1 EP 0305230 B1 EP0305230 B1 EP 0305230B1 EP 88401817 A EP88401817 A EP 88401817A EP 88401817 A EP88401817 A EP 88401817A EP 0305230 B1 EP0305230 B1 EP 0305230B1
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EP
European Patent Office
Prior art keywords
roller
web
machine
oscillating
intake
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP88401817A
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German (de)
French (fr)
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EP0305230A1 (en
Inventor
Michael Armelin
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Machines Chambon SA
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Machines Chambon SA
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Publication date
Application filed by Machines Chambon SA filed Critical Machines Chambon SA
Priority to AT88401817T priority Critical patent/ATE72554T1/en
Publication of EP0305230A1 publication Critical patent/EP0305230A1/en
Application granted granted Critical
Publication of EP0305230B1 publication Critical patent/EP0305230B1/en
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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
    • B65H20/30—Arrangements for accumulating surplus web
    • B65H20/32—Arrangements for accumulating surplus web by making loops
    • B65H20/34—Arrangements for accumulating surplus web by making loops with rollers
    • 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
    • B65H20/06—Advancing webs by friction band
    • B65H20/08—Advancing webs by friction band to effect step-by-step advancement of web

Definitions

  • the present invention relates to a feeding device for a machine working on a sheet of material when stopped, applicable more particularly but not exclusively to the feeding of a flat cutting press.
  • this web is generally delivered upstream, in a continuous manner, from a coil.
  • the flat cutting press is a machine which requires a temporary stop of the running of the sheet of material, during the cutting operation, there occurs, due to the continuous feeding, an accumulation of the material to be cut, in upstream of the cutting press.
  • various devices have already been designed which make it possible to store the excess length of the ply in the form of a variable length loop.
  • This loop lengthens during the shutdown of the cutting press and it shortens as soon as the supply of the cutting press resumes, for a subsequent cutting operation, these operations taking place cyclically. Failure to maintain the sheet then causes positioning faults in the sheet as soon as the operating speed rises.
  • Another device as described in patent FR-A-2205053, comprises an oscillating cylinder over which the web passes before it enters the machine and means cyclically controlling the oscillation movement of the support of this oscillating cylinder.
  • the object of the present invention is to provide a device of particularly simple design, allowing easy adjustment for its adaptation to different formats, this adjustment even being able to be completed on the fly.
  • this supply device for a machine working on a sheet of material at a standstill, in particular for a flat blanking press, this sheet being continuously supplied, upstream of the machine, passing between a pair of call cylinders and counterpart of horizontal and transverse axes, tangent to each other, driven in rotation at a constant peripheral speed
  • this device comprising an oscillating cylinder disposed downstream of the call cylinder in the direction of travel of the ply, and which is rotatably mounted on a support which can oscillate around an axis, means for causing an oscillating movement of the support and of the cylinder which it carries, means for maintaining the tension of the ply arranged at the input of the machine and means for cyclically controlling the oscillation movement of the support and of the oscillating cylinder so that the length of the path of the web, between the call cylinder and the machine, is allo born or shortened to give the desired law for the advance of the web in the machine, law including in particular a stop phase in the machine, is characterized in
  • the device according to the invention offers the advantage that, whatever the format of the operation carried out in the machine, for example the format of the cutting, there is no sliding between the sheet of cut material and the oscillating cylinder of the fact that the latter is always rotated at the same peripheral speed as the call cylinder, from the latter.
  • This absence of sliding avoids altering the printing in the case of a printed web which is in contact with the oscillating cylinder by its printed face and it makes it possible to maintain the relative positioning of the web in the cutting machine with respect to the other devices upstream.
  • the control of the oscillation movement of the oscillating cylinder is provided on one side of the device, which results in a great simplification.
  • the feeding device also includes means making it possible to fine-tune, during the operation of the device, the adjustment of the amplitude of the oscillation movement of the oscillating cylinder. These fine adjustment means in operation also allow easily realize a servo of the device to any size such as the tension of the sheet.
  • the law of advancement of the sheet comprises an acceleration phase in which the instantaneous value of the acceleration is controlled in particular so that at the start of the sheet, which is a critical phase since it is necessary to ensure detachment of the web of the machine tool, this acceleration has a low value and that it then increases gradually.
  • Figure 1 is a schematic elevational view of a supply device for a machine working on a sheet of material stopped, according to the invention.
  • Figure 2 is a vertical and cross sectional view taken along line II-II of Figure 1, the oscillating cylinder being assumed to be aligned vertically below the call cylinder.
  • Figure 3 is a partial elevational view of the mechanism controlling the movement of the oscillating cylinder.
  • Figure 4 is a partial elevational view of an alternative embodiment.
  • the device according to the invention is intended to ensure the intermittent supply of a sheet 1 of any material, printed or not, which is worked at standstill by a machine 2 located downstream, such as for example a press to cut flat.
  • the sheet 1 is supplied continuously upstream, at a constant speed v, from any source, such as a reel, and it moves from right to left in FIG. 1, towards the machine shaping 2.
  • the feed device comprises two tangent horizontal and transverse cylinders between which the web passes, namely a lower call cylinder 3 and an upper counter cylinder 4.
  • the call cylinder 3 which is located under the sheet, is rotated from the previous machine, which is for example a reel, by means of a mechanical transmission shown schematically in Figure 1 and designated as a whole by the reference C.
  • the cylinder call 3 is secured to a coaxial gear 5 which is engaged with a coaxial gear 6 secured to an oscillating cylinder 7 located above the ply 1 so that the two cylinders 3 and 7 rotate in opposite directions.
  • the ratio of the pitch diameters of these gears 5,6 corresponds to that of the diameters of the two cylinders 3 and 7 so that they always rotate at the same peripheral speed.
  • the oscillating cylinder 7 is rotatably mounted on a support comprising a pair of parallel arms 8 between the ends of which extends the oscillating cylinder 7.
  • the parallel arms 8 are fixed radially at the two ends a hollow shaft 9, horizontal and transverse, passing coaxially right through the call cylinder 3.
  • the support of the oscillating cylinder 7 could comprise only one radial arm 8, the oscillating cylinder 7 then being mounted in cantilever on this single arm 8.
  • the call cylinder 3 is rotatably mounted on the hollow shaft 9 by means of bearings 11.
  • the hollow shaft 9 is itself mounted oscillating in the uprights of a frame 12, by means of bearings 13.
  • the hollow shaft 9 which carries the arms 8 and consequently the oscillating cylinder 7, is secured, at one of its ends, in this case at its straight end in FIG. 2, to a radial lever 14 by which an oscillating movement is transmitted to the arms 8.
  • a radial slide 15 On this lever 14 is fixed, in an adjustable longitudinal position, a radial slide 15, by means of screws 16.
  • a slide 17 which can be moved radially on needle shoes 18.
  • This slide 17 is integral with the lower end of a threaded rod 19 which extends along the slide 15 and the lever 14 and which is engaged, near the 'axis of oscillation of this lever 14, with a nut 21 itself secured to a coaxial toothed pulley 22 surrounding the upper part of the adjusting threaded rod 19.
  • This toothed pulley 22 is coupled, by means of a toothed belt 23 extending right through the hollow shaft 9, to another toothed pulley 24 located on the other side of the frame of the device and which can be driven in rotation by a suitable control mechanism not shown.
  • the slide 17 is integral with a horizontal and transverse axis 25 on which is articulated, by means of bearings 26, one end of a connecting rod 27.
  • the other end of the connecting rod 27 is articulated on a crank pin 28 itself same articulated, around an axis 29, on a drum 31 rotating around a horizontal and transverse axis 32, this drum 31 being driven from the general control C of the device.
  • the crank pin 28 carries, at its free end, two cam rollers 33, 34 which roll respectively, in two different transverse planes, inside a fixed cam 35 and outside a fixed cam follower 36 , these two cams having a profile calculated according to the desired law of motion.
  • the ply 1 passes at constant speed v between the call cylinder 3 and the upper counterpart cylinder 4, it is wound on a part of the peripheral surface of the call cylinder 3, then it passes around half of the peripheral surface of the oscillating cylinder 7, which rotates at the same peripheral speed v as the cylinder 3, due to their coupling by the two gears 5,6.
  • the ply rises to the left and passes over a part of the periphery of a suction cylinder or "sliding" cylinder 37 ensuring the permanent tensioning of the ply 1 before entry in the machine 2.
  • This suction cylinder 37 constantly rotates at a peripheral speed v t greater than that v of the sheet.
  • a suction box 38 connected to a source of vacuum.
  • This suction box 38 is in contact with a part of the internal surface of the cylinder 37 whose side surface is pierced with holes 39.
  • the position of the suction box 38 and its extension in the direction of rotation of the suction cylinder 37 correspond to the zone of contact of the ply on the peripheral surface of the suction cylinder 37.
  • the control mechanism of the oscillating cylinder 7 causes this cylinder to move down and to the right to lengthen the path of the sheet between the call cylinder 3 and the suction cylinder 37, because upstream the sheet 1 continues to be delivered at the same speed v.
  • the peripheral speed of the oscillating cylinder 7, which is rotated from the call cylinder 3 is equal to the peripheral speed of this call cylinder 3, that is to say at the natural speed of the ply 1, during this pivoting movement of the arms 8 down and downward of the oscillating cylinder 7, there is no sliding between the printed upper side of the ply 1 and the oscillating cylinder 7.
  • the oscillating cylinder 7 has an oscillating movement whose period corresponds to the intermittent advance cycle of the ply 1 in the shaping machine 2.
  • the pivoting movement of the arms 8 and of the oscillating cylinder 7 which they carry, around the axis of the call cylinder 3 is controlled by the rotation of the drum 31 which is rotated from the general control C.
  • the amplitude of the oscillation of the arms 8 and of the oscillating cylinder 7 which is a function of the format, depends on the distance between the axis 25 of articulation of the connecting rod 27 on the slide 17, and the axis of oscillation, that is to say the axis of the call cylinder 3.
  • This distance can be adjusted roughly, when the device is stopped, by adjusting the longitudinal position of the slide 15 on the lever 14 and by locking the slide 15 in the appropriate position, by means of the screws 16. Also the angular setting of the cams 35.36. To this coarse adjustment can be added a fine adjustment which can be carried out while the device is running. This fine adjustment is carried out, during operation, by rotating the driving pulley 24 which transmits its movement, by means of the toothed belt 23, to the other toothed pulley 22 itself secured to the nut 21 screwed on the threaded rod 19. The rotation of the nut 21 consequently results in a translation of the rod 19 and of the slide 17 which it carries.
  • the toothed belt 23 allows this fine adjustment to be carried out easily on the fact that it can be deformed to follow the oscillation movement of the arms 8. These fine adjustment means in operation also make it possible to optionally provide servo-control of the device. to any size, such as the web tension.
  • the driving pulley 24 can be coupled to the shaft of a servomotor 37 supplied electrically by a device 38 connected to a sensor 39 of the tension of the ply 1, of so as to rotate the driving pulley 24 and consequently modify the setting of the amplitude of oscillation as a function of the tension of the ply.
  • the oscillating cylinder 7 is mounted, on the arms 8, relatively distant from the call cylinder 3 which is in this case located above the ply 1 as the oscillating cylinder 7.
  • the two cylinders 7 and 3 are coupled by means of a transmission mechanism 41 ensuring the rotary drive of the oscillating cylinder 7 in the same direction and at the same peripheral speed as the call cylinder 3.
  • the transmission mechanism 41 may consist of a gear train, an endless toothed belt passing over two toothed wheels respectively secured to the two cylinders 3 and 7, etc.

Landscapes

  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Advancing Webs (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

A device for supplying a machine working on a web of material in a stopped position particularly for a flat cutting press and in the vicinity of an intake roller and downstream thereof, in the direction of advance of the web, the device includes an oscillating roller. This roller is mounted for rotation on a support adapted to oscillate about the axis of the intake roller. The oscillating roller is driven in rotation on itself from the intake roller, via a transmission mechanism in such a manner that the peripheral speed of the oscillating roller is identical to that of the web of material winding around part of the periphery of this oscillating roller. A mechanism is provided for provoking a movement of oscillation of the support and of the roller that is bears. Other means mechanism is provided for maintaining the tension of the web disposed at the entrance of the machine and for cyclically controlling the movement of oscillation of the support and of the oscillating roller that it bears so that the length of the part of the web between the intake roller and the machine is lengthened or shortened to provide the desired law for the advance of the web in the machine and a law which includes in particular a stop phase in the machine.

Description

La présente invention concerne un dispositif d'alimentation pour une machine travaillant sur une nappe de matériau à l'arrêt, applicable plus particulièrement mais non exclusivement à l'alimentation d'une presse à découper à plat.The present invention relates to a feeding device for a machine working on a sheet of material when stopped, applicable more particularly but not exclusively to the feeding of a flat cutting press.

Dans une presse à découper à plat, qui assure le découpage cyclique d'une nappe continue, imprimée ou non, d'un matériau tel que le carton, cette nappe est généralement délivrée en amont, d'une manière continue, à partir d'une bobine. Comme la presse à découper à plat est une machine qui nécessite un arrêt momentané du défilement de la nappe de matériau, pendant l'opération de découpage, il se produit, en raison de l'alimentation continue, une accumulation du matériau à découper, en amont de la presse à découper. Pour pouvoir accumuler la longueur de nappe débitée en amont, tandis qu'une partie aval de cette nappe se trouve à l'arrêt dans la presse à découper à plat, on a déjà conçu divers dispositifs qui permettent de stocker la longueur excédentaire de la nappe sous la forme d'une boucle de longueur variable. Cette boucle s'allonge pendant l'arrêt de la presse à découper et elle se raccourcit dès que l'alimentation de la presse à découper reprend, en vue d'une opération de découpage subséquente, ces opérations se déroulant cycliquement. Le non maintien de la nappe occasionne alors des défauts de positionnement de la nappe dès que la vitesse de fonctionnement s'élève.In a flat cutting press, which ensures the cyclic cutting of a continuous web, printed or not, of a material such as cardboard, this web is generally delivered upstream, in a continuous manner, from a coil. As the flat cutting press is a machine which requires a temporary stop of the running of the sheet of material, during the cutting operation, there occurs, due to the continuous feeding, an accumulation of the material to be cut, in upstream of the cutting press. In order to be able to accumulate the length of ply fed upstream, while a downstream part of this ply is at a standstill in the flat cutting press, various devices have already been designed which make it possible to store the excess length of the ply in the form of a variable length loop. This loop lengthens during the shutdown of the cutting press and it shortens as soon as the supply of the cutting press resumes, for a subsequent cutting operation, these operations taking place cyclically. Failure to maintain the sheet then causes positioning faults in the sheet as soon as the operating speed rises.

Pour pallier cet inconvénient des dispositifs évitant la formation d'une boucle libre, à l'aide d'un mécanisme de compensation comportant un cylindre mobile absorbant cette boucle, ont été envisagés. Un dispositif particulier de ce type, décrit dans le brevet FR-A-2 408 538, utilise une solution introduisant un glissement minimal de la nappe sur le cylindre solidaire du mécanisme de compensation, pour un format de découpage déterminé mais par contre ce glissement devient important si le format du découpage varie. Par ailleurs un tel dispositif exige un arrêt de la machine pour permettre son réglage, il comprend un mécanisme complexe et une double commande de chaque côté. Il en résulte qu'un tel dispositif est relativement complexe et peu commode à mettre en oeuvre.To overcome this drawback, devices have been envisaged which avoid the formation of a free loop, using a compensation mechanism comprising a movable cylinder absorbing this loop. A particular device of this type, described in patent FR-A-2 408 538, uses a solution introducing a minimum sliding of the ply on the cylinder integral with the compensation mechanism, for a determined cutting format but on the other hand this sliding becomes important if the cutting format varies. Furthermore, such a device requires a machine stop to allow its adjustment, it includes a mechanism complex and a double command on each side. As a result, such a device is relatively complex and inconvenient to implement.

Un autre dispositif, tel que décrit dans le brevet FR-A-2205053, comporte un cylindre oscillant sur lequel passe la nappe avant son entrée dans la machine et des moyens commandant cycliquement le mouvement d'oscillation du support de ce cylindre oscillant.Another device, as described in patent FR-A-2205053, comprises an oscillating cylinder over which the web passes before it enters the machine and means cyclically controlling the oscillation movement of the support of this oscillating cylinder.

La présente invention a pour but de fournir un dispositif de conception particulièrement simple, permettant un réglage aisé pour son adaptation à des formats différents, ce réglage pouvant même être terminé en marche.The object of the present invention is to provide a device of particularly simple design, allowing easy adjustment for its adaptation to different formats, this adjustment even being able to be completed on the fly.

A cet effet ce dispositif d'alimentation pour une machine travaillant sur une nappe de matériau à l'arrêt, notamment pour une presse à découper à plat, cette nappe étant débitée en continu, en amont de la machine, en passant entre une paire de cylindres d'appel et contrepartie d'axes horizontaux et transversaux, tangents l'un à l'autre, entraînés en rotation à une vitesse périphérique constante, ce dispositif comportant un cylindre oscillant disposé en aval du cylindre d'appel dans le sens du défilement de la nappe, et qui est monté à rotation sur un support pouvant osciller autour d'un axe, des moyens pour provoquer un mouvement d'oscillation du support et du cylindre qu'il porte, des moyens de maintien de la tension de la nappe disposés à l'entrée de la machine et des moyens pour commander cycliquement le mouvement d'oscillation du support et du cylindre oscillant de façon que la longueur du trajet de la nappe, entre le cylindre d'appel et la machine, soit allongée ou raccourcie pour donner la loi désirée pour l'avance de la nappe dans la machine, loi comportant notamment une phase d'arrêt dans la machine, est caractérisé en ce que le cylindre oscillant est monté au voisinage du cylindre d'appel, le support du cylindre oscillant peut osciller autour de l'axe du cylindre d'appel et le cylindre oscillant est entraîné en rotation sur lui-même à partir du cylindre d'appel, par l'intermédiaire d'un mécanisme de transmission de telle façon que la vitesse périphérique du cylindre oscillant soit identique à celle de la nappe de matériau s'enroulant autour d'une partie de la périphérie de ce cylindre oscillant et étant toujours en contact sans glissement avec la surface du cylindre oscillant.To this end, this supply device for a machine working on a sheet of material at a standstill, in particular for a flat blanking press, this sheet being continuously supplied, upstream of the machine, passing between a pair of call cylinders and counterpart of horizontal and transverse axes, tangent to each other, driven in rotation at a constant peripheral speed, this device comprising an oscillating cylinder disposed downstream of the call cylinder in the direction of travel of the ply, and which is rotatably mounted on a support which can oscillate around an axis, means for causing an oscillating movement of the support and of the cylinder which it carries, means for maintaining the tension of the ply arranged at the input of the machine and means for cyclically controlling the oscillation movement of the support and of the oscillating cylinder so that the length of the path of the web, between the call cylinder and the machine, is allo born or shortened to give the desired law for the advance of the web in the machine, law including in particular a stop phase in the machine, is characterized in that the oscillating cylinder is mounted in the vicinity of the call cylinder, the support of the oscillating cylinder can oscillate about the axis of the call cylinder and the oscillating cylinder is rotated on itself from the call cylinder, by means of a transmission mechanism so that the peripheral speed of the oscillating cylinder is identical to that of the sheet of material winding around a part of the periphery of this oscillating cylinder and always being in non-slip contact with the surface of the oscillating cylinder.

Le dispositif suivant l'invention offre l'avantage que, quel que soit le format de l'opération effectuée dans la machine, par exemple le format du découpage, il ne se produit aucun glissement entre la nappe de matériau découpé et le cylindre oscillant du fait que ce dernier est toujours entraîné en rotation à la même vitesse périphérique que le cylindre d'appel, à partir de celui-ci. Cette absence de glissement évite d'altérer l'impression dans le cas d'une nappe imprimée qui est en contact avec le cylindre oscillant par sa face imprimée et elle permet de conserver le positionnement relatif de la nappe dans la machine de découpage par rapport aux autres appareils en amont. Par ailleurs la commande du mouvement d'oscillation du cylindre oscillant est prévue d'un seul côté du dispositif, ce qui entraîne une grande simplification. Egalement le dispositif d'alimentation comporte des moyens permettant d'ajuster d'une manière fine, pendant la marche du dispositif, le réglage de l'amplitude du mouvement d'oscillation du cylindre oscillant.Ces moyens de réglage fin en marche permettent en outre de réaliser aisément un asservissement du dispositif à une grandeur quelconque telle que la tension de la nappe.The device according to the invention offers the advantage that, whatever the format of the operation carried out in the machine, for example the format of the cutting, there is no sliding between the sheet of cut material and the oscillating cylinder of the fact that the latter is always rotated at the same peripheral speed as the call cylinder, from the latter. This absence of sliding avoids altering the printing in the case of a printed web which is in contact with the oscillating cylinder by its printed face and it makes it possible to maintain the relative positioning of the web in the cutting machine with respect to the other devices upstream. Furthermore, the control of the oscillation movement of the oscillating cylinder is provided on one side of the device, which results in a great simplification. The feeding device also includes means making it possible to fine-tune, during the operation of the device, the adjustment of the amplitude of the oscillation movement of the oscillating cylinder. These fine adjustment means in operation also allow easily realize a servo of the device to any size such as the tension of the sheet.

Un autre avantage procuré par le dispositif suivant l'invention est que la loi d'avancement de la nappe comporte une phase d'accélération dans laquelle la valeur instantanée de l'accélération est contrôlée notamment pour qu'au démarrage de la nappe, qui est une phase critique puisqu'il faut assurer le décollement de la nappe de l'outil de la machine, cette accélération ait une valeur faible et qu'elle croisse ensuite progressivement.Another advantage provided by the device according to the invention is that the law of advancement of the sheet comprises an acceleration phase in which the instantaneous value of the acceleration is controlled in particular so that at the start of the sheet, which is a critical phase since it is necessary to ensure detachment of the web of the machine tool, this acceleration has a low value and that it then increases gradually.

On décrira ci-après,à titre d'exemples non limitatifs, diverses formes d'exécution de la présente invention, en référence au dessin annexé sur lequel :Various embodiments of the present invention will be described below, by way of non-limiting examples, with reference to the appended drawing in which:

La figure 1 est une vue en élévation schématique d'un dispositif d'alimentation pour une machine travaillant sur une nappe de matériau à l'arrêt, suivant l'invention.Figure 1 is a schematic elevational view of a supply device for a machine working on a sheet of material stopped, according to the invention.

La figure 2 est une vue en coupe verticale et transversale faite suivant la ligne II-II de la figure 1, le cylindre oscillant étant supposé être aligné verticalement en dessous du cylindre d'appel.Figure 2 is a vertical and cross sectional view taken along line II-II of Figure 1, the oscillating cylinder being assumed to be aligned vertically below the call cylinder.

La figure 3 est une vue en élévation partielle du mécanisme commandant le mouvement du cylindre oscillant.Figure 3 is a partial elevational view of the mechanism controlling the movement of the oscillating cylinder.

La figure 4 est une vue en élévation partielle d'une variante d'exécution.Figure 4 is a partial elevational view of an alternative embodiment.

Le dispositif suivant l'invention est destiné à assurer l'alimentation intermittente d'une nappe 1 d'un matériau quelconque, imprimée ou non, qui est travaillée à l'arrêt par une machine 2 située en aval, telle que par exemple une presse à découper à plat. La nappe 1 est fournie en continu en amont, à une vitesse constante v, à partir d'une source quelconque, tel qu'un dévidoir, et elle se déplace de la droite vers la gauche sur la figure 1, en direction de la machine de façonnage 2.The device according to the invention is intended to ensure the intermittent supply of a sheet 1 of any material, printed or not, which is worked at standstill by a machine 2 located downstream, such as for example a press to cut flat. The sheet 1 is supplied continuously upstream, at a constant speed v, from any source, such as a reel, and it moves from right to left in FIG. 1, towards the machine shaping 2.

Le dispositif d'alimentation suivant l'invention comprend deux cylindres tangents horizontaux et transversaux entre lesquels passe la nappe, à savoir un cylindre d'appel inférieur 3 et un cylindre contrepartie supérieur 4. Le cylindre d'appel 3, qui est situé sous la nappe, est entraîné en rotation, à partir de la machine précédente, qui est par exemple un dévidoir, par l'intermédiaire d'une transmission mécanique représentée schématiquement sur la figure 1 et désignée dans son ensemble par la référence C. Le cylindre d'appel 3 est solidaire d'un engrenage coaxial 5 qui est en prise avec un engrenage coaxial 6 solidaire d'un cylindre oscillant 7 situé au-dessus de la nappe 1 si bien que les deux cylindres 3 et 7 tournent en sens inverse. Le rapport des diamètres primitifs de ces engrenages 5,6 correspond à celui des diamètres des deux cylindres 3 et 7 de manière que ceux-ci tournent toujours à la même vitesse périphérique.The feed device according to the invention comprises two tangent horizontal and transverse cylinders between which the web passes, namely a lower call cylinder 3 and an upper counter cylinder 4. The call cylinder 3, which is located under the sheet, is rotated from the previous machine, which is for example a reel, by means of a mechanical transmission shown schematically in Figure 1 and designated as a whole by the reference C. The cylinder call 3 is secured to a coaxial gear 5 which is engaged with a coaxial gear 6 secured to an oscillating cylinder 7 located above the ply 1 so that the two cylinders 3 and 7 rotate in opposite directions. The ratio of the pitch diameters of these gears 5,6 corresponds to that of the diameters of the two cylinders 3 and 7 so that they always rotate at the same peripheral speed.

Le cylindre oscillant 7 est monté à rotation sur un support comportant une paire de bras parallèles 8 entre les extrémités desquels s'étend le cylindre oscillant 7. Les bras parallèles 8 sont fixés radialement aux deux extrémités d'un arbre creux 9, horizontal et transversal, traversant coaxialement de part en part le cylindre d'appel 3. Toutefois cette disposition n'est pas limitative et le support du cylindre oscillant 7 pourrait ne comporter qu'un seul bras radial 8, le cylindre oscillant 7 étant alors monté en porte-à-faux sur ce bras unique 8. Comme on peut le voir sur la figure 2, le cylindre d'appel 3 est monté à rotation sur l'arbre creux 9 par l'intermédiaire de roulements 11. L'arbre creux 9 est lui-même monté oscillant dans des montants d'un bâti 12, par l'intermédiaire de roulements 13.The oscillating cylinder 7 is rotatably mounted on a support comprising a pair of parallel arms 8 between the ends of which extends the oscillating cylinder 7. The parallel arms 8 are fixed radially at the two ends a hollow shaft 9, horizontal and transverse, passing coaxially right through the call cylinder 3. However, this arrangement is not limiting and the support of the oscillating cylinder 7 could comprise only one radial arm 8, the oscillating cylinder 7 then being mounted in cantilever on this single arm 8. As can be seen in FIG. 2, the call cylinder 3 is rotatably mounted on the hollow shaft 9 by means of bearings 11. The hollow shaft 9 is itself mounted oscillating in the uprights of a frame 12, by means of bearings 13.

L'arbre creux 9 qui porte les bras 8 et par conséquent le cylindre oscillant 7, est solidaire, à l'une de ses extrémités, en l'occurrence à son extrémité droite sur la figure 2, d'un levier radial 14 par lequel un mouvement d'oscillation est transmis aux bras 8. Sur ce levier 14 est fixée, dans une position longitudinale réglable, une coulisse radiale 15, au moyen de vis 16. A l'extrémité de cette coulisse 15 est monté un coulisseau 17 qui peut être déplacé radialement sur des patins à aiguilles 18. Ce coulisseau 17 est solidaire de l'extrémité inférieure d'une tige filetée 19 qui s'étend le long de la coulisse 15 et du levier 14 et qui est en prise, à proximité de l'axe d'oscillation de ce levier 14, avec un écrou 21 lui-même solidaire d'une poulie dentée coaxiale 22 entourant la partie supérieure de la tige filetée de réglage 19. Cette poulie dentée 22 est accouplée, par l'intermédiaire d'une courroie crantée 23 s'étendant de part en part à travers l'arbre creux 9, à une autre poulie dentée 24 située de l'autre côté du bâti du dispositif et qui peut être entraînée en rotation par un mécanisme de commande approprié non représenté.The hollow shaft 9 which carries the arms 8 and consequently the oscillating cylinder 7, is secured, at one of its ends, in this case at its straight end in FIG. 2, to a radial lever 14 by which an oscillating movement is transmitted to the arms 8. On this lever 14 is fixed, in an adjustable longitudinal position, a radial slide 15, by means of screws 16. At the end of this slide 15 is mounted a slide 17 which can be moved radially on needle shoes 18. This slide 17 is integral with the lower end of a threaded rod 19 which extends along the slide 15 and the lever 14 and which is engaged, near the 'axis of oscillation of this lever 14, with a nut 21 itself secured to a coaxial toothed pulley 22 surrounding the upper part of the adjusting threaded rod 19. This toothed pulley 22 is coupled, by means of a toothed belt 23 extending right through the hollow shaft 9, to another toothed pulley 24 located on the other side of the frame of the device and which can be driven in rotation by a suitable control mechanism not shown.

Le coulisseau 17 est solidaire d'un axe horizontal et transversal 25 sur lequel est articulée, par l'intermédiaire de roulements 26, une extrémité d'une bielle 27. L'autre extrémité de la bielle 27 est articulée sur un maneton 28 lui-même articulé, autour d'un axe 29, sur un tambour 31 tournant autour d'un axe horizontal et transversal 32, ce tambour 31 étant entraîné à partir de la commande générale C du dispositif. Le maneton 28 porte, à son extrémité libre, deux galets de came 33,34 lesquels roulent respectivement, dans deux plans transversaux différents, à l'intérieur d'une came fixe 35 et à l'extérieur d'une contre-came fixe 36, ces deux cames ayant un profil calculé en fonction de la loi de mouvement désirée.The slide 17 is integral with a horizontal and transverse axis 25 on which is articulated, by means of bearings 26, one end of a connecting rod 27. The other end of the connecting rod 27 is articulated on a crank pin 28 itself same articulated, around an axis 29, on a drum 31 rotating around a horizontal and transverse axis 32, this drum 31 being driven from the general control C of the device. The crank pin 28 carries, at its free end, two cam rollers 33, 34 which roll respectively, in two different transverse planes, inside a fixed cam 35 and outside a fixed cam follower 36 , these two cams having a profile calculated according to the desired law of motion.

Comme on peut le voir sur la figure 1 la nappe 1 passe à la vitesse constante v entre le cylindre d'appel 3 et le cylindre contrepartie supérieur 4, elle s'enroule sur une partie de la surface périphérique du cylindre d'appel 3, puis elle passe autour de la moitié de la surface périphérique du cylindre oscillant 7, qui tourne à la même vitesse périphérique v que le cylindre 3, du fait de leur accouplement par les deux engrenages 5,6. Après s'être enroulée sous le cylindre oscillant 7, la nappe remonte vers la gauche et passe sur une partie de la périphérie d'un cylindre aspirant ou cylindre "glissant" 37 assurant le maintien permanent en tension de la nappe 1 avant l'entrée dans la machine 2. Ce cylindre aspirant 37 tourne constamment à une vitesse périphérique vt supérieure à celle v de la nappe. A l'intérieur du cylindre aspirant 37 se trouve un caisson d'aspiration 38 relié à une source de vide. Ce caisson d'aspiration 38 est en contact avec une partie de la surface interne du cylindre 37 dont la surface latérale est percée de trous 39. La position du caisson d'aspiration 38 et son extension dans le sens de rotation du cylindre aspirant 37 correspondent à la zone de contact de la nappe sur la surface périphérique du cylindre aspirant 37.As can be seen in FIG. 1, the ply 1 passes at constant speed v between the call cylinder 3 and the upper counterpart cylinder 4, it is wound on a part of the peripheral surface of the call cylinder 3, then it passes around half of the peripheral surface of the oscillating cylinder 7, which rotates at the same peripheral speed v as the cylinder 3, due to their coupling by the two gears 5,6. After being rolled up under the oscillating cylinder 7, the ply rises to the left and passes over a part of the periphery of a suction cylinder or "sliding" cylinder 37 ensuring the permanent tensioning of the ply 1 before entry in the machine 2. This suction cylinder 37 constantly rotates at a peripheral speed v t greater than that v of the sheet. Inside the suction cylinder 37 is a suction box 38 connected to a source of vacuum. This suction box 38 is in contact with a part of the internal surface of the cylinder 37 whose side surface is pierced with holes 39. The position of the suction box 38 and its extension in the direction of rotation of the suction cylinder 37 correspond to the zone of contact of the ply on the peripheral surface of the suction cylinder 37.

Lorsque la nappe 2 doit être arrêtée pendant un certain temps dans la machine de façonnage 2, telle qu'une presse à découper à plat, le mécanisme de commande du cylindre oscillant 7 provoque un déplacement de ce cylindre vers le bas et vers la droite pour allonger le trajet de la nappe entre le cylindre d'appel 3 et le cylindre aspirant 37, du fait qu'en amont la nappe 1 continue à être débitée à la même vitesse v. Comme la vitesse périphérique du cylindre oscillant 7, qui est entraîné en rotation à partir du cylindre d'appel 3, est égale à la vitesse périphérique de ce cylindre d'appel 3, c'est-à-dire à la vitesse propre de la nappe 1, il ne se produit, durant ce mouvement de pivotement des bras 8 vers le bas et de descente du cylindre oscillant 7, aucun glissement entre la face supérieure imprimée de la nappe 1 et le cylindre oscillant 7.When the web 2 has to be stopped for a certain time in the shaping machine 2, such as a flat cutting press, the control mechanism of the oscillating cylinder 7 causes this cylinder to move down and to the right to lengthen the path of the sheet between the call cylinder 3 and the suction cylinder 37, because upstream the sheet 1 continues to be delivered at the same speed v. As the peripheral speed of the oscillating cylinder 7, which is rotated from the call cylinder 3, is equal to the peripheral speed of this call cylinder 3, that is to say at the natural speed of the ply 1, during this pivoting movement of the arms 8 down and downward of the oscillating cylinder 7, there is no sliding between the printed upper side of the ply 1 and the oscillating cylinder 7.

Une fois terminée l'opération (découpage par exemple) dans la machine 2, l'avancement de la nappe dans la machine 2 reprend et à ce moment les bras 8 et le cylindre oscillant 7 sont ralentis et dès que la vitesse de la nappe dans la machine 2 est supérieure à la vitesse v, ils remontent,ce qui raccourcit le trajet de la nappe. Une fois la nappe 1 avancée, dans la machine 2, de la longueur désirée correspondant au format, cette nappe est arrêtée dans la machine 2, comme précédemment, et par suite de la redescente du cylindre oscillant 7 le cycle d'allongement du trajet de la nappe reprend et ainsi de suite.Once the operation is complete (cutting for example) in machine 2, the advancement of the web in machine 2 resumes and at this time the arms 8 and the oscillating cylinder 7 are slowed down and as soon as the speed of the web in machine 2 is greater than speed v, they go back up, which shortens the path of the sheet. Once the ply 1 advanced, in the machine 2, of the desired length corresponding to the format, this ply is stopped in the machine 2, as before, and as a result of the lowering of the oscillating cylinder 7 the lengthening cycle of the path of the tablecloth resumes and so on.

Le cylindre oscillant 7 a un mouvement d'oscillation dont la période correspond au cycle d'avance intermittente de la nappe 1 dans la machine de façonnage 2. Le mouvement de pivotement des bras 8 et du cylindre oscillant 7 qu'ils portent, autour de l'axe du cylindre d'appel 3, est commandé par la rotation du tambour 31 qui est entraîné en rotation à partir de la commande générale C. L'amplitude de l'oscillation des bras 8 et du cylindre oscillant 7 qui est fonction du format, dépend de la distance entre l'axe 25 d'articulation de la bielle 27 sur le coulisseau 17, et l'axe d'oscillation, c'est-à-dire l'axe du cylindre d'appel 3. Cette distance peut être réglée d'une manière grossière, à l'arrêt du dispositif, en ajustant la position longitudinale de la coulisse 15 sur le levier 14 et en bloquant la coulisse 15 dans la position appropriée, au moyen des vis 16. Egalement on modifie le calage angulaire des cames 35,36. A ce réglage grossier peut s'ajouter un réglage fin qui peut être effectué pendant la marche du dispositif. Ce réglage fin est réalisé, en cours de marche, en entraînant en rotation la poulie menante 24 qui transmet son mouvement, par l'intermédaire de la courroie crantée 23, à l'autre poulie crantée 22 elle-même solidaire de l'écrou 21 vissé sur la tige filetée 19. La rotation de l'écrou 21 se traduit par conséquent par une translation de la tige 19 et du coulisseau 17 qu'elle porte. La courroie crantée 23 permet d'effectuer aisément ce réglage fin en marche du fait qu'elle peut se déformer pour suivre le mouvement d'oscillation des bras 8. Ces moyens de réglage fin en marche permettent en outre de réaliser éventuellement un asservissement du dispositif à une grandeur quelconque, telle que la tension de la nappe. A cet effet, comme il est représenté schématiquement sur la figure 2, la poulie menante 24 peut être accouplée à l'arbre d'un servomoteur 37 alimenté électriquement par un dispositif 38 relié à un capteur 39 de la tension de la nappe 1, de manière à faire tourner la poulie menante 24 et à modifier par conséquent le réglage de l'amplitude d'oscillation en fonction de la tension de la nappe.The oscillating cylinder 7 has an oscillating movement whose period corresponds to the intermittent advance cycle of the ply 1 in the shaping machine 2. The pivoting movement of the arms 8 and of the oscillating cylinder 7 which they carry, around the axis of the call cylinder 3 is controlled by the rotation of the drum 31 which is rotated from the general control C. The amplitude of the oscillation of the arms 8 and of the oscillating cylinder 7 which is a function of the format, depends on the distance between the axis 25 of articulation of the connecting rod 27 on the slide 17, and the axis of oscillation, that is to say the axis of the call cylinder 3. This distance can be adjusted roughly, when the device is stopped, by adjusting the longitudinal position of the slide 15 on the lever 14 and by locking the slide 15 in the appropriate position, by means of the screws 16. Also the angular setting of the cams 35.36. To this coarse adjustment can be added a fine adjustment which can be carried out while the device is running. This fine adjustment is carried out, during operation, by rotating the driving pulley 24 which transmits its movement, by means of the toothed belt 23, to the other toothed pulley 22 itself secured to the nut 21 screwed on the threaded rod 19. The rotation of the nut 21 consequently results in a translation of the rod 19 and of the slide 17 which it carries. The toothed belt 23 allows this fine adjustment to be carried out easily on the fact that it can be deformed to follow the oscillation movement of the arms 8. These fine adjustment means in operation also make it possible to optionally provide servo-control of the device. to any size, such as the web tension. To this end, as shown diagrammatically in FIG. 2, the driving pulley 24 can be coupled to the shaft of a servomotor 37 supplied electrically by a device 38 connected to a sensor 39 of the tension of the ply 1, of so as to rotate the driving pulley 24 and consequently modify the setting of the amplitude of oscillation as a function of the tension of the ply.

Dans la variante d'exécution de l'invention représentée sur la figure 4, le cylindre oscillant 7 est monté, sur les bras 8, relativement éloigné du cylindre d'appel 3 qui est dans ce cas situé au-dessus de la nappe 1 comme le cylindre oscillant 7. Les deux cylindres 7 et 3 sont accouplés par l'intermédiaire d'un mécanisme de transmission 41 assurant l'entraînement en rotation du cylindre oscillant 7 dans le même sens et à la même vitesse périphérique que le cylindre d'appel 3. Le mécanisme de transmission 41 peut être constitué par un train d'engrenages, une courroie crantée sans fin passant sur deux roues dentées respectivement solidaires des deux cylindres 3 et 7 etc...In the alternative embodiment of the invention shown in FIG. 4, the oscillating cylinder 7 is mounted, on the arms 8, relatively distant from the call cylinder 3 which is in this case located above the ply 1 as the oscillating cylinder 7. The two cylinders 7 and 3 are coupled by means of a transmission mechanism 41 ensuring the rotary drive of the oscillating cylinder 7 in the same direction and at the same peripheral speed as the call cylinder 3. The transmission mechanism 41 may consist of a gear train, an endless toothed belt passing over two toothed wheels respectively secured to the two cylinders 3 and 7, etc.

Claims (10)

1. Device for supplying a machine 2 working on a web of material 1 in stopped position, particularly for a flat cut-out press, this web being continuously supplied, upstream of the machine, passing between a pair of intake (3) and counterpart (4) rollers of horizontal and transverse axes, tangential to each other, driven in rotation at a constant peripheral speed, this device comprising an oscillating roller 7 disposed downstream of the intake roller 3 in the direction of advance of the web 1, and which is mounted to rotate on a support 8, 9 able to oscillate about an axis, means for provoking a movement of oscillation of the support 8, 9 and of the roller 7 that it bears, means 37, 38 for maintaining the tension of the web 1, disposed at the entrance of the machine 2 and means for cyclically controlling the movement of oscillation of the support 8, 9 and of the oscillating roller 7 so that the length of the path of the web 1, between the intake roller 3 and the machine 2, is lengthened or shortened to give the desired law for the advance of the web in the machine, law comprising in particular a phase of stop in the machine, characterized in that the oscillating roller 7 is mounted in the vicinity of the intake roller 3, the support 8, 9 of the oscillating roller 7 may oscillate about the axis of the intake roller 3 and the oscillating roller 7 is driven in rotation on itself from the intake roller 3, via a transmission mechanism 5, 6, so that the peripheral speed of the oscillating roller 7 is identical to that of the web of material 1 winding around a part of the periphery of this oscillating roller 7 and always being in slide-less contact with the surface of the oscillating roller 7.
2. Device according to Claim 1, characterized in that the intake roller 3, located below the web 1, is fast with a coaxial gearing 5 which is in mesh with a coaxial gearing 6 fast with the oscillating roller 7, located above the web 1, the ratio of the primitive diameters of the gearings 5, 6 being equal to the ratio of the diameters of the rollers 3, 7 with which they are fast so that the two rollers 3, 7 are driven in rotation in opposite directions, at the same peripheral speed.
3. Device according to Claim 1, characterized in that the intake roller 3, located above the web 1, is coupled to the oscillating roller 7, likewise located above the web 1, via a transmission mechanism 41 ensuring drive in rotation of the oscillating roller 7 in the same direction and at the same peripheral speed as the intake roller 3.
4. Device according to any one of the preceding Claims, characterized in that the support of the oscillating roller 7 comprises at least one arm 8 fixed to a horizontal and transverse hollow shaft 9, coaxially passing right through the intake roller 3, this intake roller 3 is mounted to rotate on the hollow shaft 9 via roller bearings 11 and the hollow shaft 9 is itself mounted to oscillate in uprights of a frame 12, via roller bearings 13.
5. Device according to Claim 4, characterized in that the hollow shaft 9 is fast, at one of its ends, with a radial lever 14 of adjustable length bearing at its end a sliding block 17 articulated on the end of a connecting rod 27 animated by a reciprocating movement.
6. Device according to Claim 5, characterized in that a radial slide 15 is fixed on the lever 14, in an adjustable longitudinal position, by means of screws 16, at the end of this slide 15 is mounted the sliding block 17 which may be displaced radially and which is fast with the lower end of a threaded rod 19 which extends along the slide 15 and lever 14 and which is in mesh, near the axis of oscillation of this lever 14, with a nut 21 itself fast with a coaxial toothed pulley 22 which is coupled, via a toothed belt 23 extending right through the hollow shaft 9, to another driving toothed pulley 24 located on the other side of the frame of the device and which may be driven in rotation.
7. Device according to Claim 6, characterized in that the driving toothed pulley 24 is coupled to the shaft of a servo-motor 27 of a device 28, 29 for servo-control by any magnitude such as the tension of the web.
8. Device according to any one of Claims 5 to 7, characterized in that the sliding block 17 is fast with a horizontal and transverse spindle 25 on which the end of the connecting rod 27 is articulated via roller bearings 26.
9. Device according to Claim 8, characterized in that the other end of the connecting rod 27 is articulated on a crank pin 28 itself articulated, about a pin 29, on a drum 31 rotating about a horizontal and transverse pin 32, the crank pin 29 bearing, at its free end, two cam rollers 33, 34 which roll respectively in two different transverse planes, inside a fixed cam 35 and outside a fixed counter-cam 36.
10. Device according to any one of the preceding Claims, characterized in that the means 37, 38 for maintaining the tension of the web 1 on entering the machine 2 comprise an aspirating roller 37 rotating constantly at a peripheral speed vt greater than that v of the web and, inside the aspirating roller 37, a suction box 38 connected to a source of vacuum, this suction box 38 being in contact with a part of the inner surface of the roller 37 of which the lateral surface is pierced with holes 39, the position of the suction box 38 and its extension in the direction of rotation of the aspirating roller 37 corresponding to the zone of contact of the web on the peripheral surface of the aspirating roller 37.
EP88401817A 1987-07-30 1988-07-12 Intermittent web feed for a machine, particularly a sheet cut-off press Expired - Lifetime EP0305230B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88401817T ATE72554T1 (en) 1987-07-30 1988-07-12 PERIODICAL WEB FEED OF A MACHINE, ESPECIALLY FOR A SHEET CUTTING PRESS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8710817A FR2618770B1 (en) 1987-07-30 1987-07-30 FEEDING DEVICE FOR A MACHINE WORKING ON A STOPPED MATERIAL, IN PARTICULAR FOR A FLAT CUTTING PRESS
FR8710817 1987-07-30

Publications (2)

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EP0305230A1 EP0305230A1 (en) 1989-03-01
EP0305230B1 true EP0305230B1 (en) 1992-02-12

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EP88401817A Expired - Lifetime EP0305230B1 (en) 1987-07-30 1988-07-12 Intermittent web feed for a machine, particularly a sheet cut-off press

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US (1) US4863086A (en)
EP (1) EP0305230B1 (en)
AT (1) ATE72554T1 (en)
DE (1) DE3868368D1 (en)
FR (1) FR2618770B1 (en)

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Also Published As

Publication number Publication date
FR2618770A1 (en) 1989-02-03
DE3868368D1 (en) 1992-03-26
ATE72554T1 (en) 1992-02-15
EP0305230A1 (en) 1989-03-01
US4863086A (en) 1989-09-05
FR2618770B1 (en) 1990-01-05

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