EP2681141A1 - Tape paying out device for stamping machine - Google Patents

Tape paying out device for stamping machine

Info

Publication number
EP2681141A1
EP2681141A1 EP12704694.4A EP12704694A EP2681141A1 EP 2681141 A1 EP2681141 A1 EP 2681141A1 EP 12704694 A EP12704694 A EP 12704694A EP 2681141 A1 EP2681141 A1 EP 2681141A1
Authority
EP
European Patent Office
Prior art keywords
series
references
movable
static
tape
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.)
Withdrawn
Application number
EP12704694.4A
Other languages
German (de)
French (fr)
Inventor
Jean-Claude Rebeaud
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bobst Mex SA
Original Assignee
Bobst Mex SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bobst Mex SA filed Critical Bobst Mex SA
Priority to EP12704694.4A priority Critical patent/EP2681141A1/en
Publication of EP2681141A1 publication Critical patent/EP2681141A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
    • B44B5/00—Machines or apparatus for embossing decorations or marks, e.g. embossing coins
    • B44B5/0004—Machines or apparatus for embossing decorations or marks, e.g. embossing coins characterised by the movement of the embossing tool(s), or the movement of the work, during the embossing operation
    • 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
    • B65H20/24—Advancing webs by looping or like devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
    • B65H23/182—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in unwinding mechanisms or in connection with unwinding operations
    • 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
    • B65H2301/4491—Features of movement or transforming movement of handled material transforming movement from continuous to intermittent or vice versa
    • 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
    • B65H2403/20—Belt drives

Definitions

  • the present invention relates to a device for unrolling tape to stamp, for temporary storage before its actual use in a stamping printing machine.
  • the invention finds a particularly advantageous, but not exclusive, application in the field of manufacturing packaging for the luxury industry.
  • each tape stamping is stored as a coil, and it is a tree advance that ensures unwinding and circulation through the stamping machine.
  • this advance shaft is intended to rotate at variable speed since, by definition, the tape feed takes place sequentially within a platen press.
  • the problem with this kind of arrangement is that it does not allow a precise unwinding of the band.
  • a tape reel stamping indeed represents a significant mass, and therefore a relatively large inertia. It is therefore particularly difficult for such a coil to follow the succession of accelerations, decelerations and delays that is imposed by the advance shaft.
  • a tape unwinding device which takes place between the spool and the feed shaft, and which implements two sets of references whose spacing is likely to vary according to the advance. band.
  • the two sets of references are arranged substantially vis-à-vis so as to define a tape circulation path whose shape describes a succession of loops which respectively bypass each reference passing alternately a series of references to the 'other.
  • One of the series of references is movably mounted in movement relative to the other, between a close position in which the series of references are arranged close to one another so as to defining a minimum length bandwidth path, and a remote position in which said series of references are spaced apart from each other so as to define a maximum length bandwidth path.
  • the tape unrolling device further comprises means which are capable of moving the series of movable returns between the close position and the remote position, depending on the tape feedrate which is effectively controlled by the rotation of the machine. advance tree.
  • This type of strip unwinding device has the disadvantage of providing operation that is not free of jerks, especially during the transient start and stop phases, but also during the acceleration phases. and deceleration. Unfortunately, this has the effect of limiting the stamping speed of the platen press.
  • the technical problem to be solved by the object of the present invention is to propose a strip unwinding device for accumulating at least one strip to be stamped upstream of a feed shaft, said device comprising on the one hand two sets of references, one of which is movably mounted relative to the other between a close position and a remote position so as to define a variable length band circulation path, and secondly means to move the series of mobile returns between the close position and the remote position according to the tape feed, which would avoid the problems of the state of the art including providing a substantially more regular operation.
  • the solution to the technical problem posed consists, according to the present invention, in that the displacement means are able to move the series of mobile references as a function of the difference in rotational speeds between the advance shaft which is intended to rotate. variable speed and a rotary drive member which is destined to rotate at a constant speed substantially equal to the average rotational speed of said shaft 1 advance.
  • the term reference refers generally any element capable of deflecting the circulation of a band. It can in particular be static such a return to air, or be intrinsically mobile as a rotating roller.
  • the web peeling device according to the invention can be implanted at any place making it possible both to receive the strip to be stamped from its storage location, and to deliver said strip to the advance tree associated with it.
  • the web peeling device according to the invention can be associated with either a single stamping strip driven by its own feed shaft, or with several webs coupled to a common feed shaft.
  • the invention as thus defined makes it possible to overcome the problems of jerks of the state of the art, and thus to offer real flexibility of operation. It is therefore possible to operate the platen press at significantly higher rates than its counterparts in the state of the art.
  • the present invention further relates to the features which will emerge in the course of the description which follows, and which should be considered in isolation or in all their possible technical combinations.
  • FIG. 1 illustrates a stamping station in which is incorporated a tape unwinding device which is in accordance with the invention.
  • Figure 2 is a schematic representation of the strip unwinding device in a so-called loading position.
  • Figure 3 is a view similar to Figure 2, but with the strip unwinding device in the close position.
  • Figure 4 is a view similar to Figures 2 and 3, but with the tape unwinding device in the remote position.
  • FIG. 5 is a schematic representation which details the structure of the displacement means which equip the strip unwinding device of FIG. 1.
  • FIG. 6 shows in perspective an example of a concrete embodiment of a strip unwinding device according to the invention.
  • FIG. 7 shows in detail the moving part of the strip peeling device shown in FIG. 6.
  • FIG. 8 shows the part of the strip unwinding device, which moves the moving part object of FIG. 7 in displacement.
  • Figure 1 illustrates a stamping station 1 which is intended to equip a printing machine responsible for depositing gilding on cardboard packaging.
  • a printing machine commonly called gilding machine
  • gilding machine is perfectly known from the state of the art. It will not be described in detail here, both in terms of its structure and its operation.
  • a feeder responsible for feeding the sheet-fed machine, a margin table on which the sheets 10 are tabled before being accurately positioned individually, a stamping station 1 able to deposit on each sheet 10 by stamping when hot, metallized film which is derived from at least one Stamp 20, a waste recovery station for evacuating each used stamping strip, and a receiving station for the repackaging of previously processed sheets.
  • Transport means 30 are further provided for individually moving each sheet 10 from the exit of the margin table to the receiving station, including through stamping station 1. In a very conventional manner, these means of transport 30 implement a series of clamp bars 31 which are movably mounted in transverse translation through two chain trains 32 arranged laterally on each side of the printing machine.
  • the stamping of the sheets 10 takes place by means of a conventional platen press 40, more precisely between a heating upper platen 41 which is fixed, and a platinum lower 42 which is mounted movably moving in a vertical reciprocating motion.
  • the stamping station 1 is fed here only by a single stamping tape 20 which is stored in a form wound around a bobbin 21, and which is driven in scrolling by an advance shaft 50.
  • FIG. 1 further shows that the stamping station 1 also incorporates a strip unwinding device 100 which is responsible for accumulating, upstream of the feed shaft 50, the stamping strip 20 in a form pre-rolled.
  • a strip unwinding device 100 which is responsible for accumulating, upstream of the feed shaft 50, the stamping strip 20 in a form pre-rolled.
  • This tape unrolling device 100 comprises two series 110, 120 of return rollers 111, 121 which are positioned substantially vis-à-vis.
  • the assembly is arranged in such a way that these two sets of references 110, 120 define a tape circulation path whose shape describes a succession of loops which respectively bypass each reference 111, 121 alternatively by a series of references 110 120.
  • one of the two sets of references 110 is movably mounted in translation relative to the other series of references 120. This mobility is exercised between, on the one hand, a close position I (FIG. 3) in which the series of references 110, 120 are placed close to one another so as to define a minimum length band circulation path, and secondly a remote position II (FIG.
  • the strip unrolling device 100 has displacement means 130 which are able to drive in translation the series of movable references 110 between the close position I and the remote position II, and this according to the advance of band which is effectively controlled by the rotation of the feed shaft 50.
  • the displacement means 130 are able to move the series of movable references 110 as a function of the difference in speeds of rotation between the feed shaft 50 which is intended to rotate at variable speed. and a rotary drive member 131 which is rotated at a constant speed substantially equal to the average rotational speed of said feed shaft 50.
  • the translation of the series of movable references 110 can theoretically take place along any trajectory.
  • a rectilinear or curvilinear trajectory and more generally, any trajectory resulting from any combination of these two types of translation, is particularly thought.
  • references 111, 121 of each set 110, 120 are transversely separated in pairs by empty spaces whose dimensions are greater than those of the references 111, 121 of the other series 110, 120
  • This feature is intended to allow the references 111 of the mobile series 110 to pass between the references 121 of the static series 120.
  • the series of mobile references 110 is also mounted to move in translation between the close position. I (FIG. 3) and a loading position III (FIG. 2) in which said series of movable references 110 are placed on the other side of the series of static references 120 relative to the place it occupies in close position.
  • the assembly is arranged in such a way that between the close position I and the loading position III, the displacement of the references 111 of the moving series 110 is effected along a trajectory pass between references 121 of the static series 120.
  • any type of trajectory can be envisaged a priori to operate the translation of the series of movable references 110 between the close position I and the loading position III.
  • such an arrangement allows a particularly easy implementation of the strip 20 in the unwinding device 100. It suffices to pass the series of mobile references 110 on the other side of the series of static references 120, then linearly insert the strip 20 between said series of references 110, 120 (Figure 2), before returning the series of movable references 110 through the series of static references 120 to its initial position (FIG. 3). This avoids the need to manually perform the succession of loops around various referrals 111, 121, which is a valuable time saver.
  • the movable references 111 are arranged here directly opposite the empty spaces which separate between them the different static references 121, and this as well in the close position I as in the loading position III.
  • the assembly is also arranged so that between the two positions in question, the mobility in translation of the series of movable references 110 is exerted along a substantially rectilinear trajectory.
  • the two sets of references 110, 120 respectively extend in two substantially parallel positioning planes.
  • the whole is furthermore arranged in such a way that between the close position I and the remote position II, as well as between said close position I and the loading position III, the translational mobility of the series of movable references 110 is exerted according to a direction substantially perpendicular to said positioning planes.
  • the fact that the two series of references 110, 120 extend in two substantially parallel planes means, on the one hand, that the references 111, 121 of the same series 110, 120 are substantially coplanar, and on the other hand that the two corresponding planes are equidistant.
  • the fact that the mobility in translation of the series of movable references 110 is perpendicular to the two positioning planes, for its part implies that the movable references 111 are shifted transversely relative to the static references 120, and that their movement takes place in a straight line .
  • the series of mobile references 110 is integral with a mobile support, forming a walkman 140.
  • the assembly is also arranged so that the displacement means 130 are able to move the walkman 140 as well between the close position I and the remote position II, as between said close position I and the loading position III.
  • the strip unwinding device 100 advantageously has guiding means 150 which, as their name indicates, are able to guide the movement of the sliding device 140 between the close position I and the remote position II, as well as between said close position I and the loading position III.
  • the guiding function is carried out here on each side of the sliding device 140.
  • the guiding means 150 implement two trolleys 151 which are respectively fixed on the part and on the outside. other of the player 140, and which each cooperate in sliding with a guide rail 152 fixed and rectilinear.
  • the displacement means 130 are able to bring the series of mobile references 110 closer to the series of static returns 120 when the instantaneous rotation speed of the advance shaft 50 exceeds the speed of rotation. mean rotation of the same feed shaft 50, but also to move said series of mobile references 110 away from said series of static returns 120 when said instantaneous speed of rotation becomes lower than said average rotational speed.
  • the displacement means 130 implement a rotary drive member 131 which is coupled to the player 140 via at least one indirect transmission member 132, differential forming.
  • the assembly is furthermore arranged in such a way that each transmission member 132 is furthermore coupled in drive with the feed shaft 50.
  • the differential term designates all mechanism capable of drivingly coupling rotating elements rotating at different speeds.
  • the feed shaft 50 which is intended to rotate at variable speed
  • a rotary drive member 131 which is intended to rotate at a constant speed.
  • the displacement means 130 use two transmission members 132 placed on each side of the player 140.
  • Each transmission member 132 comprises a first 133 and a second series of pulleys 134, called mobile series 133, 134, which are respectively implanted behind and in front of the sliding device 140, a first 135 and a second series of pulleys 136, called static series 135, 136, which are implanted on fixed parts of the unwinding device 100, which are situated respectively behind and in front of the sliding device 140, as well as a flexible transmission element 137.
  • the assembly is arranged in such a way that each flexible transmission element 137 describes, on the one hand, a first succession of loops ( 5 and 8) which respectively bypass each pulley of the first static series 135 and the first mobile series 133, alternatively passing from one series to the other.
  • each flexible transmission element 137 cooperates by driving both with the rotary drive member 131 and with the feed shaft 50.
  • front means in relation to the direction of movement of the player 140, and considering the forward direction as that which corresponds to a distance from the series of mobile references 110 with respect to the series of static references 120.
  • the flexible transmission element 137 is constituted by a belt notched.
  • the player 140 When the advance shaft 50 rotates at the same speed as the rotary drive member 131, the player 140 remains stationary in a substantially central position relative to the first series of static pulleys 135 and the second series of static pulleys 136. This implies that the movement of the player 140 can only take place when the instantaneous speed of rotation of the feed shaft 50 is different from its average speed.
  • the direction of movement of the player 140 will depend on the evolution over time of the speed of the advance shaft 50, in other words if is about acceleration or deceleration.
  • the speed of displacement of the player 140 will be proportional to the intensity of the acceleration or deceleration generated by the advance shaft 50.
  • the amplitude of the displacement of the player 140 will be linked the duration of the acceleration or deceleration phase of the feed shaft 50, and therefore the amount of band 20 actually involved.
  • each reference 111 of the series of mobile references 110 is rotatably coupled with a pulley of each first series of movable pulleys 133 (FIGS. 1 and 7).
  • each reference 121 in the series of static returns 120 is rotatably coupled to a pulley of each first set of static pulleys 135 (FIGS. 1 and 6).
  • each static return 121 is coupled in rotation directly with the corresponding static pulley 135.
  • the coupling in rotation between each movable gear 111 and the corresponding movable pulley 133 is achieved indirectly via a gear cascade 141, 142, 143, the two end gears 141, 143 are respectively integral with said movable return 111 and said movable pulley 133.
  • the presence of the gear cascade 141, 142, 143 fulfills the drive function, while having a eccentric positioning of mobile referrals 111 compared to movable pulleys 133.
  • the final objective is of course to be able to bring the series of movable references 110 in the loading position.
  • the invention also relates to any stamping printing station 1 which is capable of depositing colored or metallized film from at least one stamping strip 20 on a succession of sheet-like elements 10, and which comprises at least one strip unwinding device 100 as previously described.
  • the invention is furthermore related to any sheet-like processing machine 10, which comprises a stamping printing station 1 able to deposit on each sheet 10 of the colored or metallized film from at least one stamping strip 20, and which further comprises at least one strip unwinding device 100 as previously described.

Landscapes

  • Advancing Webs (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Winding Of Webs (AREA)
  • Unwinding Webs (AREA)

Abstract

The present invention relates to a device (100) for paying out tape to accumulate at least one stamping tape (20) upstream of a feed shaft (50), said device (100) including on the one hand two series (110, 120) of deflectors (111, 121), one of which is mounted such as to be able to move with respect to the other in such a manner as to define a tape circulation path of variable length, and on the other hand means (130) for moving the series of mobile deflectors (110) between a close-together position (I) and a far-apart position (II) as the tape advances. The invention is noteworthy in that the movement means (130) are able to move the series of mobile deflectors (110) depending on the difference in rotation speed between the feed shaft (50) that is intended to turn at variable speed and a rotary drive member (131) that is meant to turn at a constant speed substantially equal to the average rotation speed of said feed shaft (50).

Description

DISPOSITIF DE DEROULAGE DE BANDE  TAPE DISRUPTING DEVICE
POUR MACHINE D'IMPRESSION PAR ESTAMPAGE  FOR STAMP PRINTING MACHINE
La présente invention concerne un dispositif permettant de dérouler de la bande à estamper, en vue de la stocker temporairement avant son utilisation effective au sein d'une machine d'impression par estampage . The present invention relates to a device for unrolling tape to stamp, for temporary storage before its actual use in a stamping printing machine.
L'invention trouve une application particulièrement avantageuse, mais non exclusive, dans le domaine de la fabrication d'emballages destinés à l'industrie du luxe.  The invention finds a particularly advantageous, but not exclusive, application in the field of manufacturing packaging for the luxury industry.
Il est connu d'imprimer des textes et/ou des motifs par estampage, c'est-à-dire de déposer par pression sur un support en forme de feuille, de la pellicule colorée ou métallisée issue d'une ou plusieurs bandes à estamper communément appelées bandes métallisées. Dans l'industrie, une telle opération de transfert est habituellement réalisée au moyen d'une presse à platine dans laquelle les supports d'impression sont introduits feuille à feuille, tandis que chaque bande à estamper est amenée de façon continue .  It is known to print texts and / or patterns by stamping, that is to say to deposit by pressure on a sheet-like support, colored or metallized film from one or more strips to be stamped. commonly referred to as metallized strips. In industry, such a transfer operation is usually carried out by means of a platen press in which the print media are fed sheet by sheet, while each band to be stamped is fed continuously.
Traditionnellement, chaque bande à estamper est stockée sous forme de bobine, et c'est un arbre d'avance qui assure son déroulage et sa circulation à travers la machine d'estampage. En pratique, cet arbre d'avance est voué à tourner à vitesse variable étant donné que par définition, l'avance de bande s'opère de manière séquentielle au sein d'une presse à platine. Cela signifie concrètement que la rotation de l'arbre d'avance va consister en une combinaison plus ou moins complexe d'accélérations, de décélérations et de temporisations . Le problème avec ce genre d'agencement est qu'il ne permet pas un déroulement précis de la bande. Une bobine de bande à estamper représente en effet une masse non négligeable, et donc une inertie relativement importante. Il s'avère donc particulièrement difficile pour une telle bobine de suivre la succession d'accélérations, de décélérations et de temporisations qui est imposée par l'arbre d'avance. Dès lors, l'avancée de la bande à estamper ne va pouvoir s'opérer avec la précision voulue, ce qui au final va immanquablement nuire à la qualité de l'estampage. En d'autres ' termes, si il est préférable que le déroulement d'une bande s'opère à vitesse sensiblement constante compte tenu de l'inertie de la bobine qui la supporte, cela n'est pas compatible avec le fait que cette même bande soit destinée à circuler de façon séquentielle sous l'action d'un arbre d'avance tournant à vitesse variable. Traditionally, each tape stamping is stored as a coil, and it is a tree advance that ensures unwinding and circulation through the stamping machine. In practice, this advance shaft is intended to rotate at variable speed since, by definition, the tape feed takes place sequentially within a platen press. This concretely means that the rotation of the advance shaft will consist of a more or less complex combination of accelerations, decelerations and delays. The problem with this kind of arrangement is that it does not allow a precise unwinding of the band. A tape reel stamping indeed represents a significant mass, and therefore a relatively large inertia. It is therefore particularly difficult for such a coil to follow the succession of accelerations, decelerations and delays that is imposed by the advance shaft. Therefore, the advance of the tape stamping will not be able to operate with the desired accuracy, which ultimately will inevitably affect the quality of the stamping. In other 'words, if it is preferable that the course of a tape occurs at substantially constant speed due to the inertia of the spool which supports it, this is not consistent with the fact that this same strip is intended to flow sequentially under the action of a variable speed rotating feed shaft.
Pour remédier à cette difficulté, il est possible de constituer une réserve de bande en amont de l'arbre d'avance. A cet égard, on connaît notamment un dispositif de déroulage de bande qui prend place entre la bobine et l'arbre d'avance, et qui met en œuvre deux séries de renvois dont l'écartement est susceptibles de varier en fonction de l'avance de bande. Concrètement, les deux séries de renvois sont disposées sensiblement en vis-à-vis de manière à définir un chemin de circulation de bande dont la forme décrit une succession de boucles qui contournent respectivement chaque renvoi en passant alternativement d'une série de renvois à l'autre. Une des séries de renvois est montée mobile en déplacement par rapport à l'autre, entre une position rapprochée dans laquelle les séries de renvois sont disposées à proximité l'une de l'autre de façon à définir un chemin de circulation de bande de longueur minimale, et une position éloignée dans laquelle lesdites séries de renvois sont disposées à distance l'une de l'autre de manière à définir un chemin de circulation de bande de longueur maximale. Le dispositif de déroulage de bande comporte en outre des moyens qui sont capables de déplacer la série de renvois mobiles entre la position rapprochée et la position éloignée, en fonction de l'avance de bande qui est commandée de manière effective par la rotation de l'arbre d'avance. To overcome this difficulty, it is possible to build a tape reserve upstream of the advance shaft. In this respect, a tape unwinding device is especially known which takes place between the spool and the feed shaft, and which implements two sets of references whose spacing is likely to vary according to the advance. band. Specifically, the two sets of references are arranged substantially vis-à-vis so as to define a tape circulation path whose shape describes a succession of loops which respectively bypass each reference passing alternately a series of references to the 'other. One of the series of references is movably mounted in movement relative to the other, between a close position in which the series of references are arranged close to one another so as to defining a minimum length bandwidth path, and a remote position in which said series of references are spaced apart from each other so as to define a maximum length bandwidth path. The tape unrolling device further comprises means which are capable of moving the series of movable returns between the close position and the remote position, depending on the tape feedrate which is effectively controlled by the rotation of the machine. advance tree.
Ce type de dispositif de déroulage de bande présente toutefois l'inconvénient d'offrir un fonctionnement qui n'est pas exempt d' à-coups, notamment lors des phases transitoires de démarrage et d'arrêt, mais aussi durant les phases d'accélération et de décélération. Cela a malheureusement pour conséquence de limiter la vitesse d'estampage de la presse à platine.  This type of strip unwinding device, however, has the disadvantage of providing operation that is not free of jerks, especially during the transient start and stop phases, but also during the acceleration phases. and deceleration. Unfortunately, this has the effect of limiting the stamping speed of the platen press.
Aussi, le problème technique à résoudre par l'objet de la présente invention, est de proposer un dispositif de déroulage de bande pour accumuler au moins une bande à estamper en amont d'un arbre d'avance, ledit dispositif comportant d'une part deux séries de renvois dont l'une est montée mobile en déplacement par rapport à l'autre entre une position rapprochée et une position éloignée de manière à définir un chemin de circulation de bande de longueur variable, et d'autre part des moyens à même de déplacer la série de renvois mobiles entre la position rapprochée et la position éloignée en fonction de l'avance de bande, dispositif qui permettrait d'éviter les problèmes de l'état de la technique en offrant notamment un fonctionnement sensiblement plus régulier. La solution au problème technique posé consiste, selon la présente invention, en ce que les moyens de déplacement sont aptes à déplacer la série de renvois mobiles en fonction de la différence de vitesses de rotation entre l'arbre d'avance qui est destiné à tourner à vitesse variable, et un organe d'entraînement rotatif qui est voué à tourner à une vitesse constante sensiblement égale à la vitesse de rotation moyenne dudit arbre d 1 avance . Also, the technical problem to be solved by the object of the present invention is to propose a strip unwinding device for accumulating at least one strip to be stamped upstream of a feed shaft, said device comprising on the one hand two sets of references, one of which is movably mounted relative to the other between a close position and a remote position so as to define a variable length band circulation path, and secondly means to move the series of mobile returns between the close position and the remote position according to the tape feed, which would avoid the problems of the state of the art including providing a substantially more regular operation. The solution to the technical problem posed consists, according to the present invention, in that the displacement means are able to move the series of mobile references as a function of the difference in rotational speeds between the advance shaft which is intended to rotate. variable speed and a rotary drive member which is destined to rotate at a constant speed substantially equal to the average rotational speed of said shaft 1 advance.
II est entendu que dans l'ensemble de ce texte, le terme renvoi désigne de façon générale tout élément capable de dévier la circulation d'une bande. Il peut notamment être statique tel un renvoi à air, ou être intrinsèquement mobile tel un rouleau rotatif.  It is understood that throughout this text, the term reference refers generally any element capable of deflecting the circulation of a band. It can in particular be static such a return to air, or be intrinsically mobile as a rotating roller.
La notion de série de renvois s'étend quant à elle au cas où on ne compte qu'un seul exemplaire, même si en pratique, on en dénombrera quasi systématiquement plusieurs. Concrètement, le nombre de renvois sera choisi avant tout en fonction de la quantité de bande que l'on désire mettre temporairement en réserve.  The concept of series of references extends to the case where there is only one copy, even if in practice, we will count almost systematically several. Specifically, the number of referrals will be chosen primarily based on the amount of tape that we want to put temporarily in reserve.
Il est à noter que le dispositif de déroulage de bande conforme à l'invention peut être implanté à tout endroit permettant à la fois de recevoir la bande à estamper en provenance de son lieu de stockage, et de délivrer ladite bande à destination de l'arbre d'avance qui lui est associé. Cela signifie notamment qu'un tel dispositif de déroulage de bande peut être positionné aussi bien à l'intérieur qu'à l'extérieur de la machine .  It should be noted that the web peeling device according to the invention can be implanted at any place making it possible both to receive the strip to be stamped from its storage location, and to deliver said strip to the advance tree associated with it. This means in particular that such a strip unwinding device can be positioned both inside and outside the machine.
II est également important de signaler que le dispositif de déroulage de bande selon l'invention peut être associé indifféremment à une unique bande à estamper entraînée par son propre arbre d'avance, ou à plusieurs bandes couplées à un arbre d'avance commun. Quoi qu'il en soit, l'invention telle qu'ainsi définie permet de s'affranchir des problèmes d' à-coups de l'état de la technique, et d'offrir ainsi une réelle souplesse de fonctionnement. Il est par conséquent possible de faire fonctionner la presse à platine à des cadences nettement plus élevées que ses homologues de l'état de la technique. It is also important to note that the web peeling device according to the invention can be associated with either a single stamping strip driven by its own feed shaft, or with several webs coupled to a common feed shaft. Whatever the case may be, the invention as thus defined makes it possible to overcome the problems of jerks of the state of the art, and thus to offer real flexibility of operation. It is therefore possible to operate the platen press at significantly higher rates than its counterparts in the state of the art.
La présente invention concerne en outre les caractéristiques qui ressortiront au cours de la description qui va suivre, et qui devront être considérées isolément ou selon toutes leurs combinaisons techniques possibles.  The present invention further relates to the features which will emerge in the course of the description which follows, and which should be considered in isolation or in all their possible technical combinations.
Cette description, donnée à titre d'exemple non limitatif, est destinée à mieux faire comprendre en quoi consiste 1 ' invention et comment elle peut être réalisée. La description est par ailleurs donnée en référence aux dessins annexés dans lesquels:  This description, given by way of non-limiting example, is intended to better understand what the invention consists of and how it can be achieved. The description is further given with reference to the accompanying drawings in which:
La figure 1 illustre une station d'estampage dans laquelle est intégré un dispositif de déroulage de bande qui est conforme à l'invention.  FIG. 1 illustrates a stamping station in which is incorporated a tape unwinding device which is in accordance with the invention.
La figure 2 est une représentation schématique du dispositif de déroulage de bande dans une position dite de chargement .  Figure 2 is a schematic representation of the strip unwinding device in a so-called loading position.
La figure 3 constitue une vue analogue à la figure 2, mais avec le dispositif de déroulage de bande en position rapprochée.  Figure 3 is a view similar to Figure 2, but with the strip unwinding device in the close position.
La figure 4 est une vue similaire aux figures 2 et 3, mais avec le dispositif de déroulage de bande en position éloignée.  Figure 4 is a view similar to Figures 2 and 3, but with the tape unwinding device in the remote position.
La figure 5 est une représentation schématique qui détaille la structure des moyens de déplacement qui équipent le dispositif de déroulage de bande .de la figure 1. La figure 6 montre en perspective un exemple de réalisation concret de dispositif de déroulage de bande conforme à l'invention. FIG. 5 is a schematic representation which details the structure of the displacement means which equip the strip unwinding device of FIG. 1. FIG. 6 shows in perspective an example of a concrete embodiment of a strip unwinding device according to the invention.
La figure 7 fait apparaître en détail la partie mobile du dispositif de déroulage de bande représenté à la figure 6.  FIG. 7 shows in detail the moving part of the strip peeling device shown in FIG. 6.
La figure 8 montre la partie du dispositif de déroulage de bande, qui entraîne en déplacement la partie mobile objet de la figure 7.  FIG. 8 shows the part of the strip unwinding device, which moves the moving part object of FIG. 7 in displacement.
Pour des raisons de clarté, les mêmes éléments ont été désignés par des références identiques. De même, seuls les éléments essentiels pour la compréhension de l'invention ont été représentés, et ceci sans respect de l'échelle et de manière schématique.  For the sake of clarity, the same elements have been designated by identical references. Likewise, only the essential elements for understanding the invention have been represented, and this without regard to the scale and in a schematic manner.
La figure 1 illustre une station d'estampage 1 qui est destinée à équiper une machine d'impression chargée de déposer de la dorure sur des emballages en carton. Une telle machine d'impression, communément appelée machine de dorure, est parfaitement connue de l'état de la technique. Elle ne sera donc pas décrite en détail ici, tant au niveau de sa structure que de son fonctionnement .  Figure 1 illustrates a stamping station 1 which is intended to equip a printing machine responsible for depositing gilding on cardboard packaging. Such a printing machine, commonly called gilding machine, is perfectly known from the state of the art. It will not be described in detail here, both in terms of its structure and its operation.
On rappellera simplement qu'elle est typiquement composée de plusieurs stations de travail qui sont juxtaposées pour former un ensemble unitaire capable de traiter une succession de supports d'impression en forme de feuilles 10. C'est ainsi que l'on trouve habituellement un margeur chargé d'alimenter la machine feuille à feuille, une table de marge sur laquelle les feuilles 10 sont mises en nappe avant d'être positionnées avec précision de façon individuelle, une station d'estampage 1 à même de déposer sur chaque feuille 10 par estampage à chaud, de la pellicule métallisée qui est issue d'au moins une bande à estamper 20, une station de récupération de déchets permettant d'évacuer chaque bande à estamper 20 usagée, ainsi qu'une · station de réception destinée au reconditionnement en pile des feuilles 10 préalablement traitées. Des moyens de transport 30 sont par ailleurs prévus pour déplacer individuellement chaque feuille 10 depuis la sortie de la table de marge jusqu'à la station de réception, y compris à travers la station d'estampage 1. De manière très classique, ces moyens de transport 30 mettent en œuvre une série de barres de pinces 31 qui sont montées mobiles en translation transversale par 1 ' intermédiaire de deux trains de chaînes 32 disposés latéralement de chaque côté de la machine d'impression. It will simply be recalled that it is typically composed of several workstations which are juxtaposed to form a unitary assembly capable of processing a succession of sheet-shaped printing media 10. Thus, a feeder is usually found. responsible for feeding the sheet-fed machine, a margin table on which the sheets 10 are tabled before being accurately positioned individually, a stamping station 1 able to deposit on each sheet 10 by stamping when hot, metallized film which is derived from at least one Stamp 20, a waste recovery station for evacuating each used stamping strip, and a receiving station for the repackaging of previously processed sheets. Transport means 30 are further provided for individually moving each sheet 10 from the exit of the margin table to the receiving station, including through stamping station 1. In a very conventional manner, these means of transport 30 implement a series of clamp bars 31 which are movably mounted in transverse translation through two chain trains 32 arranged laterally on each side of the printing machine.
Dans ce mode particulier de réalisation, choisi uniquement à titre d'exemple, l'estampage des feuilles 10 s'opère au moyen d'une classique presse à platine 40, plus précisément entre une platine supérieure chauffante 41 qui est fixe, et une platine inférieure 42 qui est montée mobile en déplacement suivant un mouvement de va-et-vient vertical. Par ailleurs, et afin de simplifier la compréhension de l'invention, la station d'estampage 1 n'est alimentée ici que par une seule bande à estamper 20 qui est stockée sous forme enroulée autour d'une bobine 21, et qui est entraînée en défilement par un arbre d'avance 50.  In this particular embodiment, selected solely by way of example, the stamping of the sheets 10 takes place by means of a conventional platen press 40, more precisely between a heating upper platen 41 which is fixed, and a platinum lower 42 which is mounted movably moving in a vertical reciprocating motion. Moreover, and in order to simplify the understanding of the invention, the stamping station 1 is fed here only by a single stamping tape 20 which is stored in a form wound around a bobbin 21, and which is driven in scrolling by an advance shaft 50.
La figure 1 montre par ailleurs que la station d'estampage 1 intègre en outre un dispositif de déroulage de bande 100 qui est chargé d'accumuler, en amont de l'arbre d'avance 50, de la bande à estamper 20 sous une forme pré-déroulée .  FIG. 1 further shows that the stamping station 1 also incorporates a strip unwinding device 100 which is responsible for accumulating, upstream of the feed shaft 50, the stamping strip 20 in a form pre-rolled.
Ce dispositif de déroulage de bande 100 comprend deux séries 110, 120 de rouleaux de renvois 111, 121 qui sont positionnées sensiblement en vis-à-vis. L'ensemble est agencé de telle sorte que ces deux séries de renvois 110, 120 définissent un chemin de circulation de bande dont la forme décrit une succession de boucles qui contournent respectivement chaque renvoi 111, 121 en passant alternativement d'une série de renvois 110 à l'autre 120. Par ailleurs, une des deux séries de renvois 110 est montée mobile en translation par rapport à l'autre série de renvois 120. Cette mobilité s'exerce entre, d'une part, une position rapprochée I (figure 3) dans laquelle les séries de renvois 110, 120 sont placées à proximité l'une de l'autre de manière à définir un chemin de circulation de bande de longueur minimale, et d'autre part, une position éloignée II (figure 4) dans laquelle lesdites séries de renvois 110, 120 sont disposées à distance l'une de l'autre de façon à définir un chemin de circulation de bande de longueur maximale. Enfin, le dispositif de déroulage de bande 100 dispose de moyens de déplacement 130 qui sont à même d'entraîner en translation la série de renvois mobiles 110 entre la position rapprochée I et la position éloignée II, et ce en fonction de l'avance de bande qui est commandée de manière effective par la rotation de l'arbre d'avance 50. This tape unrolling device 100 comprises two series 110, 120 of return rollers 111, 121 which are positioned substantially vis-à-vis. The assembly is arranged in such a way that these two sets of references 110, 120 define a tape circulation path whose shape describes a succession of loops which respectively bypass each reference 111, 121 alternatively by a series of references 110 120. In addition, one of the two sets of references 110 is movably mounted in translation relative to the other series of references 120. This mobility is exercised between, on the one hand, a close position I (FIG. 3) in which the series of references 110, 120 are placed close to one another so as to define a minimum length band circulation path, and secondly a remote position II (FIG. 4) wherein said series of references 110, 120 are spaced apart from each other so as to define a maximum length web traffic path. Finally, the strip unrolling device 100 has displacement means 130 which are able to drive in translation the series of movable references 110 between the close position I and the remote position II, and this according to the advance of band which is effectively controlled by the rotation of the feed shaft 50.
Conformément à l'objet de la présente invention, les moyens de déplacement 130 sont aptes à déplacer la série de renvois mobiles 110 en fonction de la différence de vitesses de rotation entre l'arbre d'avance 50 qui est destiné à tourner à vitesse variable, et un organe d'entraînement rotatif 131 qui est voué à tourner à une vitesse constante sensiblement égale à la vitesse de rotation moyenne dudit arbre d'avance 50. A ce stade de la description, il est entendu qu'entre la position rapprochée I et la position éloignée II, la translation de la série de renvois mobiles 110 peut en théorie s'opérer suivant une trajectoire quelconque. On pense notamment ici à une trajectoire rectiligne ou curviligne, et plus généralement à toute trajectoire résultant de n'importe quelle combinaison de ces deux types de translation. According to the object of the present invention, the displacement means 130 are able to move the series of movable references 110 as a function of the difference in speeds of rotation between the feed shaft 50 which is intended to rotate at variable speed. and a rotary drive member 131 which is rotated at a constant speed substantially equal to the average rotational speed of said feed shaft 50. At this stage of the description, it is understood that between the close position I and the remote position II, the translation of the series of movable references 110 can theoretically take place along any trajectory. Here, a rectilinear or curvilinear trajectory, and more generally, any trajectory resulting from any combination of these two types of translation, is particularly thought.
Selon une autre particularité de 11 invention, les renvois 111, 121 de chaque série 110, 120 sont séparés transversalement deux à deux par des espaces vides dont les dimensions sont supérieures à celles des renvois 111, 121 de l'autre série 110, 120. Cette caractéristique est destinée à permettre aux renvois 111 de la série mobiles 110, de passer entre les renvois 121 de la série statique 120. Dans cette logique, la série de renvois mobiles 110 est d'ailleurs montée mobile en translation entre la position rapprochée I (figure 3) et une position de chargement III (figure 2) dans laquelle ladite série de renvois mobiles 110 se retrouve disposée de l'autre côté de la série de renvois statiques 120 par rapport à la place qu'elle occupe en position rapprochée I. L'ensemble est agencé de manière à ce qu'entre la position rapprochée I et la position de chargement III, le déplacement des renvois 111 de la série mobile 110 s'opère suivant une trajectoire les faisant passer entre les renvois 121 de la série statique 120. According to another feature From 1 1 invention, references 111, 121 of each set 110, 120 are transversely separated in pairs by empty spaces whose dimensions are greater than those of the references 111, 121 of the other series 110, 120 This feature is intended to allow the references 111 of the mobile series 110 to pass between the references 121 of the static series 120. In this logic, the series of mobile references 110 is also mounted to move in translation between the close position. I (FIG. 3) and a loading position III (FIG. 2) in which said series of movable references 110 are placed on the other side of the series of static references 120 relative to the place it occupies in close position. I. The assembly is arranged in such a way that between the close position I and the loading position III, the displacement of the references 111 of the moving series 110 is effected along a trajectory pass between references 121 of the static series 120.
De manière analogue à ce qui a été dit précédemment, tout type de trajectoire peut à priori être envisagé pour opérer la translation de la série de renvois mobiles 110 entre la position rapprochée I et la position de chargement III. Quoi qu'il en soit, un tel agencement permet une mise en place particulièrement aisée de la bande 20 dans le dispositif de déroulage 100. Il suffit en effet de faire passer la série de renvois mobiles 110 de l'autre côté de la série de renvois statiques 120, puis d'insérer linéairement la bande 20 entre lesdites séries de renvois 110, 120 (figure 2) , avant de repasser la série de renvois mobiles 110 à travers la série de renvois statiques 120 jusqu'à sa position initiale (figure 3). On évite ainsi de devoir réaliser manuellement la succession de boucles autours des différents renvois 111, 121, ce qui représente un précieux gain de temps. In a manner analogous to what has been said above, any type of trajectory can be envisaged a priori to operate the translation of the series of movable references 110 between the close position I and the loading position III. Anyway, such an arrangement allows a particularly easy implementation of the strip 20 in the unwinding device 100. It suffices to pass the series of mobile references 110 on the other side of the series of static references 120, then linearly insert the strip 20 between said series of references 110, 120 (Figure 2), before returning the series of movable references 110 through the series of static references 120 to its initial position (FIG. 3). This avoids the need to manually perform the succession of loops around various referrals 111, 121, which is a valuable time saver.
De manière particulièrement avantageuse, les renvois mobiles 111 sont disposés ici directement en regard des espaces vides qui séparent entre eux les différents renvois statiques 121, et ce aussi bien en position rapprochée I qu'en position de chargement III. L'ensemble est par ailleurs aménagé de façon à ce qu'entre les deux positions en question, la mobilité en translation de la série de renvois mobiles 110 s'exerce suivant une trajectoire sensiblement rectiligne.  Particularly advantageously, the movable references 111 are arranged here directly opposite the empty spaces which separate between them the different static references 121, and this as well in the close position I as in the loading position III. The assembly is also arranged so that between the two positions in question, the mobility in translation of the series of movable references 110 is exerted along a substantially rectilinear trajectory.
L'intérêt d'un tel mode de réalisation réside essentiellement dans sa simplicité. En effet, en décalant transversalement les renvois mobiles 111 par rapport aux renvois statiques 121, la série de renvois mobiles 110 se retrouve idéalement positionnée pour être déplacée en ligne droite. Or une telle opération s'avère particulièrement facile à réaliser, étant donné qu'une translation rectiligne constitue un mouvement de déplacement relativement simple à générer et à guider.  The advantage of such an embodiment lies essentially in its simplicity. Indeed, by shifting the movable references 111 transversely relative to the static references 121, the series of mobile references 110 is found ideally positioned to be moved in a straight line. Now such an operation is particularly easy to achieve, since a rectilinear translation is a relatively simple movement movement to generate and guide.
De préférence, les deux séries de renvois 110, 120 s'étendent respectivement suivant deux plans de positionnement sensiblement parallèles. L'ensemble est par ailleurs agencé de manière à ce qu'entre la position rapprochée I et la position éloignée II, tout comme entre ladite position rapprochée I et la position de chargement III, la mobilité en translation de la série de renvois mobiles 110 s'exerce suivant une direction sensiblement perpendiculaire auxdits plans de positionnement . Preferably, the two sets of references 110, 120 respectively extend in two substantially parallel positioning planes. The whole is furthermore arranged in such a way that between the close position I and the remote position II, as well as between said close position I and the loading position III, the translational mobility of the series of movable references 110 is exerted according to a direction substantially perpendicular to said positioning planes.
Le fait que les deux séries de renvois 110, 120 s'étendent suivant deux plans sensiblement parallèles, signifie d'une part que les renvois 111, 121 d'une même série 110, 120 sont sensiblement coplanaires, et d'autre part que les deux plans correspondants sont équidistants . Le fait que la mobilité en translation de la série de renvois mobiles 110 s'exerce perpendiculairement aux deux plans de positionnement, implique pour sa part que les renvois mobiles 111 sont décalés transversalement par rapport aux renvois statiques 120, et que leur déplacement s'opère en ligne droite .  The fact that the two series of references 110, 120 extend in two substantially parallel planes means, on the one hand, that the references 111, 121 of the same series 110, 120 are substantially coplanar, and on the other hand that the two corresponding planes are equidistant. The fact that the mobility in translation of the series of movable references 110 is perpendicular to the two positioning planes, for its part implies that the movable references 111 are shifted transversely relative to the static references 120, and that their movement takes place in a straight line .
Selon une autre particularité de l'invention, la série de renvois mobiles 110 est solidaire d'un support mobile, formant baladeur 140. L'ensemble est par ailleurs aménagé de manière à ce que les moyens de déplacement 130 soient en mesure de déplacer le baladeur 140 aussi bien entre la position rapprochée I et la position éloignée II, qu'entre ladite position rapprochée I et la position de chargement III.  According to another feature of the invention, the series of mobile references 110 is integral with a mobile support, forming a walkman 140. The assembly is also arranged so that the displacement means 130 are able to move the walkman 140 as well between the close position I and the remote position II, as between said close position I and the loading position III.
Dans cette logique, le dispositif de déroulage de bande 100 dispose avantageusement de moyens de guidage 150 qui comme leur nom l'indique, sont à même de guider le déplacement du baladeur 140 entre la position rapprochée I et la position éloignée II, ainsi qu'entre ladite position rapprochée I et la position de chargement III. Ainsi qu'on peut le voir clairement sur la figure 6, la fonction de guidage est réalisée ici de chaque côté du baladeur 140. En effet, les moyens de guidage 150 mettent en œuvre deux chariots 151 qui sont fixés respectivement de part et d'autre du baladeur 140, et qui coopèrent chacun en coulissement avec un rail de guidage 152 fixe et rectiligne. In this logic, the strip unwinding device 100 advantageously has guiding means 150 which, as their name indicates, are able to guide the movement of the sliding device 140 between the close position I and the remote position II, as well as between said close position I and the loading position III. As can clearly be seen in FIG. 6, the guiding function is carried out here on each side of the sliding device 140. In fact, the guiding means 150 implement two trolleys 151 which are respectively fixed on the part and on the outside. other of the player 140, and which each cooperate in sliding with a guide rail 152 fixed and rectilinear.
Selon une autre particularité de l'invention, les moyens de déplacement 130 sont en mesure de rapprocher la série de renvois mobiles 110 de la série de renvois statiques 120 lorsque la vitesse de rotation instantanée de l'arbre d'avance 50 dépasse la vitesse de rotation moyenne de ce même arbre d'avance 50, mais aussi d'éloigner ladite série de renvois mobiles 110 de ladite série de renvois statiques 120 lorsque ladite vitesse de rotation instantanée devient inférieure à ladite vitesse de rotation moyenne.  According to another particularity of the invention, the displacement means 130 are able to bring the series of mobile references 110 closer to the series of static returns 120 when the instantaneous rotation speed of the advance shaft 50 exceeds the speed of rotation. mean rotation of the same feed shaft 50, but also to move said series of mobile references 110 away from said series of static returns 120 when said instantaneous speed of rotation becomes lower than said average rotational speed.
De manière particulièrement avantageuse, les moyens de déplacement 130 mettent en œuvre un organe d'entraînement rotatif 131 qui est couplé au baladeur 140 par l'intermédiaire d'au moins un organe de transmission indirect 132, formant différentiel. L'ensemble est par ailleurs agencé de manière à ce que chaque organe de transmission 132 soit en outre couplé en entraînement avec l'arbre d'avance 50. Il est à noter que dans le cadre de l'invention, le terme différentiel désigne tout mécanisme capable de coupler en entraînement des éléments rotatifs tournant à des vitesses différentes. Dans le cas présent, il s'agit en l'occurrence de l'arbre d'avance 50 qui est destiné à tourner à vitesse variable, et d'un organe d'entraînement rotatif 131 qui est voué à tourner à vitesse constante. Dans l'exemple concret de réalisation des figures 6 à 8, les moyens de déplacement 130 utilisent deux organes de transmission 132 placés de chaque côté du baladeur 140. Chaque organe de transmission 132 comprend une première 133 et une seconde série de poulies 134, dites séries mobiles 133, 134, qui sont implantées respectivement en arrière et en avant du baladeur 140, une première 135 et une seconde série de poulies 136, dites séries statiques 135, 136, qui sont implantées sur des parties fixes du dispositif de déroulage 100, qui sont situées respectivement derrière et devant le baladeur 140, ainsi qu'un élément de transmission souple 137. L'ensemble est agencé de manière à ce que chaque élément de transmission souple 137 décrive, d'une part, une première succession de boucles (figures 5 et 8) qui contournent respectivement chaque poulie de la première série statique 135 et de la première série mobile 133, en passant alternativement d'une série à l'autre, et d'autre part, une deuxième succession de boucles (figures 5 et 8) qui contournent respectivement chaque poulie de la seconde série statique 136 et de la seconde série mobile 134, en passant alternativement d'une série à l'autre. Enfin, chaque élément de transmission souple 137 coopère par entraînement à la fois avec l'organe d'entraînement rotatif 131 et avec l'arbre d'avance 50. Particularly advantageously, the displacement means 130 implement a rotary drive member 131 which is coupled to the player 140 via at least one indirect transmission member 132, differential forming. The assembly is furthermore arranged in such a way that each transmission member 132 is furthermore coupled in drive with the feed shaft 50. It should be noted that in the context of the invention, the differential term designates all mechanism capable of drivingly coupling rotating elements rotating at different speeds. In this case, it is in this case the feed shaft 50 which is intended to rotate at variable speed, and a rotary drive member 131 which is intended to rotate at a constant speed. In the concrete embodiment of Figures 6 to 8, the displacement means 130 use two transmission members 132 placed on each side of the player 140. Each transmission member 132 comprises a first 133 and a second series of pulleys 134, called mobile series 133, 134, which are respectively implanted behind and in front of the sliding device 140, a first 135 and a second series of pulleys 136, called static series 135, 136, which are implanted on fixed parts of the unwinding device 100, which are situated respectively behind and in front of the sliding device 140, as well as a flexible transmission element 137. The assembly is arranged in such a way that each flexible transmission element 137 describes, on the one hand, a first succession of loops ( 5 and 8) which respectively bypass each pulley of the first static series 135 and the first mobile series 133, alternatively passing from one series to the other. re, and secondly, a second succession of loops (Figures 5 and 8) which circumvent respectively each pulley of the second static series 136 and the second mobile series 134, alternately from one series to another. Finally, each flexible transmission element 137 cooperates by driving both with the rotary drive member 131 and with the feed shaft 50.
Il est entendu ici que les termes « avant », « arrière », « devant » « derrière » s'entendent par rapport à la direction de déplacement du baladeur 140, et en considérant le sens avant comme celui qui correspond à un éloignement de la série renvois mobiles 110 par rapport à la série de renvois statiques 120.  It is understood here that the terms "front", "rear", "front" "behind" mean in relation to the direction of movement of the player 140, and considering the forward direction as that which corresponds to a distance from the series of mobile references 110 with respect to the series of static references 120.
Dans cet exemple de réalisation, l'élément de transmission souple 137 est constitué par une courroie crantée. Il est toutefois possible d'utiliser une courroie lisse, une chaîne, un câble, etc. In this embodiment, the flexible transmission element 137 is constituted by a belt notched. However, it is possible to use a smooth belt, chain, cable, etc.
Quand l'arbre d'avance 50 tourne à la même vitesse que l'organe d'entraînement rotatif 131, le baladeur 140 reste immobile dans une position sensiblement centrale par rapport à la première série de poulies statiques 135 et la seconde série de poulies statiques 136. Cela sous-entend que le déplacement du baladeur 140 ne peut s'opérer que lorsque la vitesse de rotation instantanée de l'arbre d'avance 50 est différente de sa vitesse moyenne.  When the advance shaft 50 rotates at the same speed as the rotary drive member 131, the player 140 remains stationary in a substantially central position relative to the first series of static pulleys 135 and the second series of static pulleys 136. This implies that the movement of the player 140 can only take place when the instantaneous speed of rotation of the feed shaft 50 is different from its average speed.
Ainsi donc, dès que la vitesse de rotation de l'arbre d'avance 50 va dépasser celle de l'organe d'entraînement rotatif 131, la portion de courroie 137 située directement en amont dudit arbre d'avance 50 va tirer le baladeur 140 vers l'arrière, c'est-à-dire en direction de la série de renvois statiques 120. Les renvois mobiles 111 vont alors se rapprocher des renvois statiques 121, permettant ainsi une libération rapide de la quantité désirée de bande pré-déroulée 20.  Thus, as soon as the rotational speed of the feed shaft 50 will exceed that of the rotary drive member 131, the belt portion 137 located directly upstream of said feed shaft 50 will pull the walkman 140 towards the rear, that is to say in the direction of the series of static returns 120. The mobile references 111 will then approach the static returns 121, thus allowing a quick release of the desired amount of pre-rolled tape 20 .
Par contre, lorsque l'arbre d'avance 50 va décélérer, sa vitesse de rotation va finir par devenir inférieure à celle de l'organe d'entraînement rotatif 131. Chaque portion de courroie 137 située directement en amont dudit organe d'entraînement 131 va alors avoir tendance à tirer le baladeur 140 en avant vers sa position centrale initiale. Cela va avoir pour conséquence de générer un éloignement des renvois mobiles 111 par rapport aux renvois statiques 121, et donc une reconstitution progressive du stock de bande pré-déroulée 20.  On the other hand, when the feed shaft 50 is going to decelerate, its rotational speed will eventually become lower than that of the rotary drive member 131. Each belt portion 137 located directly upstream of said drive member 131 will then have a tendency to pull the player 140 forward towards its initial central position. This will have the consequence of generating a distance of the mobile references 111 relative to the static references 121, and thus a progressive reconstitution of the pre-rolled tape stock 20.
Ainsi donc, le sens du déplacement du baladeur 140 va dépendre de l'évolution au cours du temps de la vitesse de l'arbre d'avance 50, en d'autres termes s'il est question d'accélération ou de décélération. La vitesse de déplacement du baladeur 140 va quant à elle être proportionnelle à l'intensité de l'accélération ou de la décélération générée par l'arbre d'avance 50. Pour sa part, l'amplitude du déplacement du baladeur 140 va être liée à la durée de la phase d'accélération ou de décélération de l'arbre d'avance 50, et donc à la quantité de bande 20 réellement mise en jeu. Thus, the direction of movement of the player 140 will depend on the evolution over time of the speed of the advance shaft 50, in other words if is about acceleration or deceleration. The speed of displacement of the player 140 will be proportional to the intensity of the acceleration or deceleration generated by the advance shaft 50. For its part, the amplitude of the displacement of the player 140 will be linked the duration of the acceleration or deceleration phase of the feed shaft 50, and therefore the amount of band 20 actually involved.
Selon une autre caractéristique avantageuse de l'invention, chaque renvoi 111 de la série de renvois mobiles 110 est couplé en entraînement rotatif avec une poulie de chaque première série de poulies mobiles 133 (figures 1 et 7) . En outre, chaque renvoi 121 de la série de renvois statiques 120 est couplé en entraînement rotatif avec une poulie de chaque première série de poulies statiques 135 (figures 1 et 6) . Ces caractéristiques permettent de faire tourner les renvois 111, 121 à la même vitesse que l'arbre d'avance 50. L'objectif est d'éviter tout phénomène de glissement entre la bande- 20 et les renvois 111, 121.  According to another advantageous characteristic of the invention, each reference 111 of the series of mobile references 110 is rotatably coupled with a pulley of each first series of movable pulleys 133 (FIGS. 1 and 7). In addition, each reference 121 in the series of static returns 120 is rotatably coupled to a pulley of each first set of static pulleys 135 (FIGS. 1 and 6). These features make it possible to rotate the links 111, 121 at the same speed as the feed shaft 50. The objective is to avoid any slip phenomenon between the belt 20 and the references 111, 121.
Conformément à la figure 6, dans cet exemple de réalisation, chaque renvoi statique 121 est couplé en rotation de manière directe avec la poulie statique 135 correspondante. Par contre, et ainsi qu'on peut le voir clairement sur la figure 7, le couplage en rotation entre chaque renvoi mobile 111 et la poulie mobile 133 correspondante, est réalisé indirectement par l'intermédiaire d'une cascade de pignons 141, 142, 143 dont les deux pignons extrêmes 141, 143 sont respectivement solidaires dudit renvoi mobile 111 et de ladite poulie mobile 133. La présence de la cascade de pignons 141, 142, 143 permet de remplir la fonction d'entraînement, tout en disposant d'un positionnement excentré des renvois mobiles 111 par rapport aux poulies mobiles 133. L'objectif final est bien évidemment de pouvoir amener la série de renvois mobiles 110 en position de chargement. According to Figure 6, in this embodiment, each static return 121 is coupled in rotation directly with the corresponding static pulley 135. On the other hand, and as can clearly be seen in FIG. 7, the coupling in rotation between each movable gear 111 and the corresponding movable pulley 133 is achieved indirectly via a gear cascade 141, 142, 143, the two end gears 141, 143 are respectively integral with said movable return 111 and said movable pulley 133. The presence of the gear cascade 141, 142, 143 fulfills the drive function, while having a eccentric positioning of mobile referrals 111 compared to movable pulleys 133. The final objective is of course to be able to bring the series of movable references 110 in the loading position.
Bien entendu, l'invention concerne également toute station d'impression par estampage 1 qui est capable de déposer de la pellicule colorée ou métallisée issue d'au moins une bande à estamper 20 sur une succession d'éléments en forme de feuilles 10, et qui comporte au moins un dispositif de déroulage de bande 100 tel que précédemment décrit.  Of course, the invention also relates to any stamping printing station 1 which is capable of depositing colored or metallized film from at least one stamping strip 20 on a succession of sheet-like elements 10, and which comprises at least one strip unwinding device 100 as previously described.
Mais plus généralement encore, l'invention est en outre relative à toute machine de traitement d'éléments en forme de feuilles 10, qui comprend une station d'impression par estampage 1 à même de déposer sur chaque feuille 10 de la pellicule colorée ou métallisée issue d'au moins une bande à estamper 20, et qui comporte en outre au moins un dispositif de déroulage de bande 100 tel que précédemment décrit.  But more generally, the invention is furthermore related to any sheet-like processing machine 10, which comprises a stamping printing station 1 able to deposit on each sheet 10 of the colored or metallized film from at least one stamping strip 20, and which further comprises at least one strip unwinding device 100 as previously described.

Claims

REVENDICATIONS
1. Dispositif de déroulage de bande (100) pour accumuler au moins une bande à estamper (20) en amont d'un arbre d'avance (50), ledit dispositif (100) comportant d'une part deux séries (110, 120) de renvois (111, 121) dont l'une est montée mobile en déplacement par rapport à l'autre entre une position rapprochée (I) et une position éloignée (II) de manière à définir un chemin de circulation de bande de longueur variable, et d'autre part des moyens (130) à même de déplacer la série de renvois mobiles (110) entre la position rapprochée (I) et la position éloignée (II) en fonction de l'avance de bande, caractérisé en ce que les moyens de déplacement (130) sont aptes à déplacer la série de renvois mobiles (110) en fonction de la différence de vitesses de rotation entre l'arbre d'avance (50) qui est destiné à tourner à vitesse variable, et un organe d'entraînement rotatif (131) qui est voué à tourner à une vitesse constante sensiblement égale à la vitesse de rotation moyenne dudit arbre d'avance (50) . 1. A web unwinding device (100) for accumulating at least one stamping strip (20) upstream of a feed shaft (50), said device (100) comprising on the one hand two series (110, 120 ) referrals (111, 121) one of which is movably mounted relative to the other between a close position (I) and a remote position (II) so as to define a variable length band circulation path , and secondly means (130) able to move the series of movable references (110) between the close position (I) and the remote position (II) according to the tape feed, characterized in that the displacement means (130) are able to move the series of movable references (110) as a function of the difference in rotational speeds between the feed shaft (50) which is intended to rotate at variable speed, and an element rotary drive (131) which is rotated at a constant speed substantially equal to the speed of e mean rotation of said feed shaft (50).
2. Dispositif de déroulage de bande (100) selon la revendication 1, caractérisé en ce que les renvois (111, 121) de chaque série (110, 120) sont séparés transversalement deux à deux par des espaces vides dont les dimensions sont supérieures à celles des renvois (111, 121) de l'autre série (110, 120), en ce que la série de renvois mobiles (110) est en outre montée mobile en déplacement entre la position rapprochée (I) et une position de chargement (III) dans laquelle ladite série de renvois mobiles (110) se retrouve disposée de l'autre côté de la série de renvois statiques (120) par rapport à la place qu'elle occupe en position rapprochée (I), et en ce qu'entre la position rapprochée (I) et la · position de chargement (III) , le déplacement de la série de renvois mobiles (110) s'exerce suivant une trajectoire faisant passer les renvois (111) entre les renvois (121) de la série statique (120) . 2. Tape unrolling device (100) according to claim 1, characterized in that the references (111, 121) of each series (110, 120) are separated transversely two by two by empty spaces whose dimensions are greater than those of the references (111, 121) of the other series (110, 120), in that the series of movable references (110) is further mounted movably in displacement between the close position (I) and a loading position ( III) in which said series of movable references (110) is located on the other side of the series of static references (120) relative to the place it occupies in the close position (I), and in that between the close position (I) and the loading position (III), the movement of the series of movable references (110) is carried out along a path passing the references (111) between the references (121) of the static series (120).
3. Dispositif de déroulage de bande (100) selon la revendication 2, caractérisé en ce qu'en position rapprochée (I) et en position de chargement (III), les renvois mobiles (111) sont disposés directement en regard des espaces vides qui séparent les renvois statiques (121), et en ce qu'entre ladite position rapprochée (I) et ladite position de chargement (III), le déplacement de la série de renvois mobiles (110) s'opère suivant une trajectoire sensiblement rectiligne . 3. Tape unrolling device (100) according to claim 2, characterized in that in the close position (I) and the loading position (III), the movable references (111) are arranged directly opposite the empty spaces which separate the static returns (121), and in that between said close position (I) and said loading position (III), the displacement of the series of movable references (110) operates along a substantially rectilinear path.
4. Dispositif de déroulage de bande (100) selon l'une des revendications 2 ou 3 , caractérisé en ce que les deux séries de renvois (110, 120) s'étendent respectivement suivant deux plans de positionnement sensiblement parallèles, et en ce qu'entre la position rapprochée (I) et la position éloignée (II), tout comme entre ladite position rapprochée (I) et la position de chargement (III), le déplacement de la série de renvois mobiles (110) s'opère suivant une direction sensiblement perpendiculaire auxdits plans de positionnement . 4. Tape unrolling device (100) according to one of claims 2 or 3, characterized in that the two sets of references (110, 120) respectively extend in two substantially parallel positioning planes, and in that 'between the close position (I) and the remote position (II), as well as between said close position (I) and the loading position (III), the displacement of the series of movable references (110) takes place according to a direction substantially perpendicular to said positioning planes.
5. Dispositif de déroulage de bande (100) selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la série de renvois mobiles (110) est solidaire d'un support mobile, formant baladeur (140), et en ce que les moyens de déplacement (130) sont aptes à déplacer le baladeur (140) entre la position rapprochée (I) et la position éloignée (II), ainsi que le cas échéant entre ladite position rapprochée (I) et la position de chargement (III) . 5. Tape unrolling device (100) according to any one of claims 1 to 4, characterized in that the series of movable references (110) is integral with a movable support, forming walkman (140), and in that that the displacement means (130) are able to move the player (140) between the close position (I) and the remote position (II), as well as, if appropriate, between said close position (I) and the loading position ( III).
6. Dispositif de déroulage de bande (100) selon la revendication 5, caractérisé en ce qu'il comporte des moyens de guidage (150) aptes à guider le déplacement du baladeur (140) entre la position rapprochée (I) et la position éloignée (II) , ainsi que le cas échéant entre ladite position rapprochée (I) et la position de chargement (III) . 6. Tape unrolling device (100) according to claim 5, characterized in that it comprises guide means (150) adapted to guide the movement of the player (140) between the close position (I) and the remote position (II), and where appropriate between said close position (I) and the loading position (III).
7. Dispositif de déroulage de bande (100) selon l'une quelconque des revendications 1 à 6, caractérisé en ce que les moyens de déplacement (130) sont aptes à rapprocher la série de renvois mobiles (110) de la série de renvois statiques (120) lorsque la vitesse de rotation instantanée de l'arbre d'avance (50) dépasse la vitesse de rotation moyenne de ce même arbre d'avance (50), et à éloigner ladite série de renvois mobiles (110) de ladite série de renvois statiques (120) lorsque ladite vitesse de rotation instantanée est inférieure à ladite vitesse de rotation moyenne. 7. Tape unrolling device (100) according to any one of claims 1 to 6, characterized in that the displacement means (130) are adapted to bring the series of mobile references (110) of the series of static returns (120) when the instantaneous rotation speed of the feed shaft (50) exceeds the average rotational speed of the same feed shaft (50), and moving said series of movable feeders (110) away from said feed shaft (50). static returns (120) when said instantaneous rotational speed is lower than said average rotational speed.
8. Dispositif de déroulage de bande (100) selon l'une quelconque des revendications 5 à 7, caractérisé en ce que les moyens de déplacement (130) comportent un organe d'entraînement rotatif (131) qui est couplé au baladeur (140) par l'intermédiaire d'au moins un organe de transmission indirect (132), formant différentiel, et en ce que" chaque organe de transmission (132) est par ailleurs couplé en entraînement avec l'arbre d' avance (50) . Tape unrolling device (100) according to one of claims 5 to 7, characterized in that the displacement means (130) comprise a rotary drive member (131) which is coupled to the sliding device (140). via at least one differential transmission member (132) forming a differential, and in that "each transmission member (132) is further coupled in drive with the feed shaft (50).
9. Dispositif de déroulage de bande (100) selon la revendication 8, caractérisé en ce que chaque organe de transmission (132) comporte une première et une seconde série de poulies, dites séries mobiles (133, 134), qui sont implantées respectivement en arrière et en avant du baladeur (140) , une première et une seconde série de poulies, dites séries statiques (135, 136) , qui sont implantées sur des parties fixes du dispositif de déroulage (100) , qui sont situées respectivement derrière et devant le baladeur (140), ainsi qu'un élément de transmission souple (137) qui décrit d'une part une première succession de boucles qui contournent respectivement chaque poulie de la première série statique (135) et de la première série mobile (133) en passant alternativement d'une série à l'autre, et d'autre part une deuxième succession de boucles qui contournent respectivement chaque poulie de la seconde série statique (136) et de la seconde série mobile (134) en passant alternativement d'une série à l'autre, et en ce que l'élément de transmission souple (137) coopère en outre par entraînement avec l'organe organe d'entraînement rotatif (131) et avec l'arbre d'avance (50) . Tape unrolling device (100) according to claim 8, characterized in that each transmission member (132) has a first and a second series of pulleys, said moving series (133, 134), which are respectively rear and forward of the player (140), a first and a second series of pulleys, called static series (135, 136), which are located on fixed parts of the unwinding device (100), which are located respectively behind and in front of the player (140), as well as a flexible transmission element (137) which firstly describes a first succession of loops which respectively bypass each pulley of the first static series (135) and the first mobile series (133) passing alternately from one series to another, and secondly a second succession of loops which respectively bypass each pulley of the second static series (136) and the second mobile series (134) passing alternatively from one series to another, and in that the flexible transmission element (137) further cooperates by driving with the rotary drive member (131) and with the feed shaft (50). ).
10. Dispositif de déroulage de bande (100) selon la revendication 9, caractérisé en ce que chaque renvoi (111) de la série de renvois mobiles (110) est couplé en entraînement rotatif avec une poulie de chaque première série de poulies mobiles (133), et en ce que chaque renvois (121) de la série de renvois statiques (120) est couplé en entraînement rotatif avec une poulie de chaque première série de poulies statiques (135) . Tape unrolling device (100) according to claim 9, characterized in that each return (111) of the series of movable references (110) is rotatably coupled with a pulley of each first set of movable pulleys (133). ), and in that each reference (121) of the series of static references (120) is rotatably coupled with a pulley of each first set of static pulleys (135).
11. Station d'impression par estampage (1) pour déposer de la pellicule colorée ou métallisée issue d'au moins une bande à estamper (20) sur une succession d'éléments en forme de feuilles (10), caractérisée en ce qu'elle comporte au moins un dispositif de déroulage de bande (100) selon l'une quelconque des revendications précédentes. 11. Embossing printing station (1) for depositing colored or metallized film from at least one stamping strip (20) on a succession of sheet-like elements (10), characterized in that it comprises at least one web peeling device (100) according to any one of the preceding claims.
12. Machine de traitement d'éléments en forme de feuilles (10), comprenant une station d'impression par estampage (1) pour déposer sur chaque feuille (10) de la pellicule colorée ou métallisée issue d'au moins une bande à estamper (20), caractérisée en ce qu'elle comporte en outre au moins un dispositif de déroulage de bande (100) selon l'une quelconque des revendications 1 à 10. A sheet-like processing machine (10) comprising a stamping station (1) for depositing on each sheet (10) colored or metallized film from at least one stamping strip. (20), characterized in that it further comprises at least one web peeling device (100) according to any one of claims 1 to 10.
EP12704694.4A 2011-02-28 2012-02-15 Tape paying out device for stamping machine Withdrawn EP2681141A1 (en)

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PCT/EP2012/000654 WO2012116781A1 (en) 2011-02-28 2012-02-15 Tape paying out device for stamping machine
EP12704694.4A EP2681141A1 (en) 2011-02-28 2012-02-15 Tape paying out device for stamping machine

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US20130327235A1 (en) 2013-12-12
JP2014509997A (en) 2014-04-24
TW201302591A (en) 2013-01-16
TWI454417B (en) 2014-10-01
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BR112013019919A2 (en) 2016-12-13
CN103391892A (en) 2013-11-13

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