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EP0022381B1 - Device for controlling the cylinders of an offset printing press - Google Patents

Device for controlling the cylinders of an offset printing press Download PDF

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Publication number
EP0022381B1
EP0022381B1 EP19800400792 EP80400792A EP0022381B1 EP 0022381 B1 EP0022381 B1 EP 0022381B1 EP 19800400792 EP19800400792 EP 19800400792 EP 80400792 A EP80400792 A EP 80400792A EP 0022381 B1 EP0022381 B1 EP 0022381B1
Authority
EP
European Patent Office
Prior art keywords
wheel
cylinders
shaft
cylinder
drive
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
Application number
EP19800400792
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German (de)
French (fr)
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EP0022381A1 (en
Inventor
Alain Ducournau
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.)
Creusot Loire SA
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Creusot Loire SA
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Filing date
Publication date
Application filed by Creusot Loire SA filed Critical Creusot Loire SA
Publication of EP0022381A1 publication Critical patent/EP0022381A1/en
Application granted granted Critical
Publication of EP0022381B1 publication Critical patent/EP0022381B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/008—Mechanical features of drives, e.g. gears, clutches
    • B41F13/012—Taking-up backlash
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/02—Rotary lithographic machines for offset printing
    • B41F7/12—Rotary lithographic machines for offset printing using two cylinders one of which serves two functions, e.g. as a transfer and impression cylinder in perfecting machines

Definitions

  • the subject of the invention is a new device for controlling the cylinders of a printing machine by the OFFSET process.
  • the cylinders having to be obviously synchronized, they generally receive their movements from a single transmission shaft which drives a meshing wheel with a corresponding toothed wheel placed on one of the cylinders, for example a plate cylinder, the movement then being transmitted. in series from cylinder to cylinder then to the ink rollers, each cylinder being fitted at the end of the shaft with a toothed wheel which meshes with the corresponding wheels of the cylinders which surround it.
  • the Blanchet cylinders are generally covered with a covering made up of a rubberized canvas intended to receive the impression in order to transfer it to the paper and having a certain elasticity which allows the application under pressure of the sheet.
  • the latter are provided at their ends with smooth treads which rest on each other and whose diameters are strictly exact so as to roll without slipping.
  • the slight difference in diameter between the Blanchet cylinders and the plate cylinders leads to certain drawbacks in the conventional serial transmission mode when one wants to carry out a register adjustment.
  • the register adjustment which allows perfect color overlay, is obtained by the possibility of slight angular adjustments of each of the plate cylinders around its axis.
  • This adjustment can be obtained for example by axial displacement of the drive wheel of the plate cylinder which, when the teeth are helical, turns slightly while resting on the wheels which surround it and in particular the wheel of the corresponding blanket cylinder.
  • these two cylinders are in contact and consequently the Blanchet cylinder would tend, by friction, to follow the rotation of the plate cylinder. It is therefore necessary to allow a slight rotation of the plate cylinder relative to the Blanchet cylinder by means of a connection, for example friction. This may result in a slight offset of the grooves which are provided on the cylinders for the attachment of their respective clothing.
  • each plate cylinder carries two straight side-by-side wheels, wedged at the end of the shaft, respectively a inner wheel which meshes with a drive wheel of the corresponding blanket cylinder and an outer wheel which receives the drive movement.
  • the subject of the invention is a new, less bulky and less expensive arrangement of the drive control, which also has the advantage of combining the advantages of the known arrangements without having the drawbacks of each of them.
  • the two intermediate wheels are each centered respectively on the shaft of one of the Blanchet cylinders, next to the latter's drive wheel, said intermediate wheels being mounted free in rotation each on the shaft which carries it.
  • Figure 1 there is shown in front view the drive kinematic chain of a printing machine according to the invention, the set of rollers being shown in Figure 2 in section along the line A-A.
  • the set of rollers comprises two blanket cylinders 1 and 2 between which the sheet passes, and whose axes are placed in a plane slightly inclined relative to the horizontal .
  • Each Blanchet cylinder 1 or 2 cooperates with a plate cylinder, respectively 3 and 4.
  • Each plate cylinder 3 or 4 is associated with a chain of ink rollers, respectively 5 and 6, the role of which is to take ink from a trough forming an inkwell and to spread it progressively so as to distribute it evenly over the corresponding plate cylinder.
  • each cylinder and each roller are provided, at one end of the shaft, with a toothed wheel which meshes with the corresponding wheels placed at the ends of the shafts of the cylinders or rollers which frame it, each cylinder thus receiving its movement from a neighboring cylinder and transmitting it to a neighboring cylinder (or roller).
  • the invention is characterized by an original arrangement of the drive kinematic chains of the different cylinders which is shown diagrammatically in FIG. 2.
  • Figure 2 is a developed view of a section along the line A-A and that is why the cylinders and the rollers are shown one above the other.
  • the drive shaft 80 drives, via a bevel gear reducer 8, the toothed wheel 81 which sets in motion all of the cylinders and rollers. This movement is transmitted separately to the two Blanchet cylinders by the plate cylinder 3, the shaft 30 of which carries two joined toothed wheels 31 and 32 centered in planes P 1 and P 2 and which constitute the pinions upstream of the drive kinematic chains. Blanchet cylinders.
  • these two pinions may have a smaller width of teeth than that of the wheel 32 placed towards the outside, at the end of the shaft 30 and which directly receives the movement of the drive wheel 81 and transmits it to the second blanket cylinder 2 via a second kinematic chain.
  • the Blanchet cylinder 2 carries, wedged on its shaft 20, a wheel 21 which meshes with a toothed wheel 41 wedged on the shaft of the plate cylinder 4. These two wheels are centered in a plane P 3 offset by relative to the plane P i , preferably on the side of the cylinders, so as to allow the rotation of the two wheels 11 and 21.
  • the axis 40 of the plate cylinder 4 carries a second outer wheel 42 wedged at the end of the shaft to side of the inner wheel 41 and centered in the same plane P 2 as the wheel 32 wedged on the shaft of the cylinder 3 and meshing with the driving wheel 81.
  • FIG. 3 shows in more detail the method of mounting the drive wheels for the Blanchet cylinders and the plate cylinders.
  • the different shafts 10, 20, 30, 40 of the cylinders are carried at their ends by bearings 13, 23, 33, 43 mounted on the frame B of the machine.
  • the treads for example 100 and 200 which rest on each other so as to maintain the center distance of the cylinders.
  • a sleeve 34 is mounted in cantilever which is wedged on the shaft 30 for example by a keying or by a locking system 35 of known type.
  • the wheel 31 is centered on the sleeve 34 and secured in rotation with the latter.
  • the wheel 32 is provided with an extension 320 which is adjusted to a centering surface 340 formed on the outside of the sleeve 34 and it is slidably mounted on said surface so as to be able to move axially over a small distance.
  • This axial displacement is determined, in known manner, by an adjustment rod 7 passing through an axial bore formed in the shaft 3 and provided on the mechanism side with a head 70 for fixing to the extension 320 of the wheel 32 and at its other end, on the operating side, of a conventional adjustment knob not shown.
  • the wheel 32 is secured in rotation with the sleeve 34 by means of straight grooves 321.
  • the rod 7 an axial displacement of the wheel 32 is controlled, the latter remains integral in rotation of the shaft 30 of the plate cylinder 3 and of the wheel 31.
  • the wheel 32 meshes with the drive wheel 81 and the intermediate pinion 12 by means of helical teeth. Consequently, the axial displacement of the wheel 32 controls, by pressing on the wheel 81, a slight rotation of the wheel 32 and of its axis 30.
  • This arrangement allows the damper adjustment of the cylinder of plate 3. Thanks to the meshing of the toothed wheels 11 and 31, this slight rotation of the plate cylinder 3 is transmitted to the corresponding Blanchet cylinder 1, which in particular makes it possible to maintain the coincidence of the hooking grooves of the linings of the cylinders.
  • the damper adjustment of the plate cylinder 3 n ' has no consequence on the other Blanchet 2 cylinder.
  • the wheels are mounted on the shafts of the other cylinders in a similar manner.
  • the wheel 11 for driving the cylinder 1 is fixed on a sleeve 14 integral in rotation with the shaft 10.
  • the sleeve 14 is provided, towards the outside, with an extension 140 providing a smooth range 141 for centering of the intermediate wheel 12.
  • the wheel 12 is simply adjusted relative to the bearing 140 but is not linked in rotation to the shaft 1.
  • the wheel 12 transmits the movement received from the wheel 32 without influence the rotation of the shaft 1.
  • the other plate cylinder 4 carries at the end of the shaft two inner and outer wheels 41 and 42 respectively mounted in a similar manner to that which has been described for the wheels 31, 32 of the cylinder 3, this arrangement comprising in particular a device register adjustment known per se.
  • the two plate cylinders 3 and 4 are driven in synchronism from the drive wheel 81.
  • each of the plate cylinders 3, 4 drives the Blanchet cylinder which corresponds to it respectively 1 and 2, and the register setting of each plate cylinder has an influence only on the corresponding Blanchet cylinder.
  • each Blanchet cylinder remains completely independent of the plate cylinder which does not correspond to it.
  • the arrangement according to the invention it is therefore possible, by means of a simple and space-saving device to individually adjust the register of each plate cylinder without interference on the Blanchet cylinder which does not correspond to it.
  • each of the plate cylinders 3 or 4 is associated with a set inking rollers 5 or 6 which are driven from the corresponding plate cylinder by means of a clutch.
  • each of the plate cylinders constitutes the driving element for all the elements associated with it, the two plate cylinders being driven from the same driving shaft.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)

Description

L'invention a pour objet un nouveau dispositif de commande des cyJindres d'une machine d'imprimerie par procédé OFFSET.The subject of the invention is a new device for controlling the cylinders of a printing machine by the OFFSET process.

On sait que dans une machine d'imprimerie en offset, la feuille de papier passe entre deux cylindres dits cylindres de Blanchet qui sont en contact chacun avec un cylindre dit de plaque. L'encre déposée par l'intermédiaire d'une série de rouleaux encreurs sur le cylindre de plaque se dépose sur la toile recouvrant le cylindre de Blanchet qui l'imprime sur la feuille de papier.We know that in an offset printing machine, the sheet of paper passes between two cylinders called Blanchet cylinders which are each in contact with a so-called plate cylinder. The ink deposited via a series of ink rollers on the plate cylinder is deposited on the canvas covering the Blanchet cylinder which prints it on the sheet of paper.

Les cylindres devant être évidemment synchronisés, il reçoivent généralement leurs mouvements à partir d'un arbre de transmission unique qui entraîne une roue engrenant avec une roue dentée correspondante placée sur l'un des cylindres par exemple un cylindre de plaque, le mouvement étant ensuite transmis en série de cylindre en cylindre puis aux rouleaux encreurs, chaque cylindre étant muni en bout d'arbre d'une roue dentée qui engrène avec les roues correspondantes des cylindres qui l'encadrent.The cylinders having to be obviously synchronized, they generally receive their movements from a single transmission shaft which drives a meshing wheel with a corresponding toothed wheel placed on one of the cylinders, for example a plate cylinder, the movement then being transmitted. in series from cylinder to cylinder then to the ink rollers, each cylinder being fitted at the end of the shaft with a toothed wheel which meshes with the corresponding wheels of the cylinders which surround it.

Il en résulte, dans la disposition classique, que si, par exemple, le mouvement est reçu par un premier cylindre de plaque et transmis au premier cylindre de Blanchet qui lui correspond, c'est celui-ci qui entraîne le second cylindre de Blanchet, celui-ci entraînant à son tour le second cylindre de plaque.As a result, in the conventional arrangement, if, for example, the movement is received by a first plate cylinder and transmitted to the first Blanchet cylinder which corresponds to it, it is this which drives the second Blanchet cylinder, this in turn driving the second plate cylinder.

Pour qu'il y ait une bonne application des cylindres de Blanchet sur la feuille de papier, ceux-ci sont recouverts généralement d'un habillage constitué d'une toile caoutchoutée destinée à recevoir l'impression pour la reporter sur le papier et ayant une certaine élasticité qui permet l'application sous pression de la feuille. Il en résulte un léger écrasement du cylindre de Blanchet à son contact avec l'autre Blanchet et avec le cylindre de plaque correspondant qui, lui, a un diamètre sensiblement constant. Pour maintenir rigoureusement l'entraxe des cylindres, ceux-ci sont munis à leurs extrémités de bandes de roulement lisses qui s'appuient les unes sur les autres et dont les diamètres sont rigoureusement exacts de façon à rouler sans glissement. Cependant, la légère différence de diamètre entre les cylindres de Blanchet et les cylindres de plaque entraîne certains inconvénients dans le mode de transmission en série classique lorsque l'on veut effectuer un réglage de registre.So that there is a good application of the Blanchet cylinders on the sheet of paper, these are generally covered with a covering made up of a rubberized canvas intended to receive the impression in order to transfer it to the paper and having a certain elasticity which allows the application under pressure of the sheet. This results in a slight crushing of the Blanchet cylinder in contact with the other Blanchet and with the corresponding plate cylinder which, for its part, has a substantially constant diameter. To strictly maintain the center distance of the cylinders, the latter are provided at their ends with smooth treads which rest on each other and whose diameters are strictly exact so as to roll without slipping. However, the slight difference in diameter between the Blanchet cylinders and the plate cylinders leads to certain drawbacks in the conventional serial transmission mode when one wants to carry out a register adjustment.

On sait que le réglage de registre, qui permet une parfaite surperposition des couleurs, s'obtient par la possibilité de légers réglages angulaires de chacun des cylindres de plaque autour de son axe. Ce réglage peut être obtenu par exemple par déplacement axial de la roue d'entraînement du cylindre de plaque qui, lorsque les dentures sont hélicoïdales, tourne légèrement en prenant appui sur les roues qui l'encadrent et notamment la roue du cylindre de Blanchet correspondant. Il en résulte un mouvement relatif de rotation entre les dentures du cylindre de plaque et du cylindre de Blanchet. Or ces deux cylindres sont en contact et par conséquent le cylindre de Blanchet aurait tendance, par frottement, à suivre la rotation du cylindre de plaque. On est donc amené à autoriser une légère rotation du cylindre de plaque par rapport au cylindre de Blanchet grâce à une liaison, à frottement par exemple. Il peut en résulter un léger décalage des gorges qui sont ménagées sur les cylindres pour l'accrochage de leurs habillements respectifs.We know that the register adjustment, which allows perfect color overlay, is obtained by the possibility of slight angular adjustments of each of the plate cylinders around its axis. This adjustment can be obtained for example by axial displacement of the drive wheel of the plate cylinder which, when the teeth are helical, turns slightly while resting on the wheels which surround it and in particular the wheel of the corresponding blanket cylinder. This results in a relative rotational movement between the teeth of the plate cylinder and the Blanchet cylinder. Now these two cylinders are in contact and consequently the Blanchet cylinder would tend, by friction, to follow the rotation of the plate cylinder. It is therefore necessary to allow a slight rotation of the plate cylinder relative to the Blanchet cylinder by means of a connection, for example friction. This may result in a slight offset of the grooves which are provided on the cylinders for the attachment of their respective clothing.

D'autre part, on a vu que, du fait de l'élasticité des toiles des Blanchets, le diamètre de ceux-ci dans la zone de contact ne peut pas correspondre toujours rigoureusement au diamètre primitif des engrenages. Un jeu de l'engrenage peut donc entraîner un mouvement relatif des Blanchets, du fait du montage en série, il y a une possibilité d'accumulation des jeux qui entraîne une fluctuation de cylindre à cylindre et le mouvement relatif des Blanchets qui en résulte peut déterminer des stries sur la feuille.On the other hand, we have seen that, due to the elasticity of the blankets' fabrics, the diameter of these in the contact area cannot always correspond strictly to the original diameter of the gears. A play of the gear can therefore cause a relative movement of the blankets, because of the series connection, there is a possibility of accumulation of the games which causes a fluctuation from cylinder to cylinder and the relative movement of the blankets which results therefrom can determine streaks on the leaf.

. C'est pourquoi il est intéressant de commander l'entraînement des deux cylindres de Blanchet indépendamment l'un de l'autre, chacun par l'intermédiaire du cylindre de plaque qui lui correspond. Ainsi chaque cylindre de Blanchet peut suivre le réglage du cylindre de plaque correspondant indépendamment du reste de la chaîne cinématique.. This is why it is interesting to control the drive of the two Blanchet cylinders independently of each other, each by means of the plate cylinder which corresponds to it. Thus each Blanchet cylinder can follow the setting of the corresponding plate cylinder independently of the rest of the kinematic chain.

Le document FR-A 2 362 005, par exemple, décrit, dans le mode de réalisation de la figure 3 un dispositif de ce genre, dans lequel chaque cylindre de plaque porte deux roues droites accolées, calées en bout d'arbre, respectivement une roue intérieure qui engrène avec une roue d'entraînement du cylindre de Blanchet correspondant et une roue extérieure qui reçoit le mouvement d'entraînement.The document FR-A 2 362 005, for example, describes, in the embodiment of FIG. 3, a device of this kind, in which each plate cylinder carries two straight side-by-side wheels, wedged at the end of the shaft, respectively a inner wheel which meshes with a drive wheel of the corresponding blanket cylinder and an outer wheel which receives the drive movement.

Cependant, dans ce dispositif connu, qui s'applique spécialement à des installations comprenant plusieurs groupes imprimeurs placés côte à côte, le mouvement est transmis d'un groupe à l'autre par une série de roues intermédiaires de grand diamètre engrenant l'une dans l'autre, chaque groupe comprenant aussi deux roues intermédiaires qui tournent en des sens opposés et engrènent chacune avec la roue extérieure de l'un des cylindres de plaque. Une telle disposition n'est applicable qu'à des installations de petite taille puisque le diamètre des roues intermédiaires doit être égal à l'écartement des groupes imprimeurs.However, in this known device, which applies especially to installations comprising several printing groups placed side by side, the movement is transmitted from one group to another by a series of intermediate wheels of large diameter meshing one in the other, each group also comprising two intermediate wheels which rotate in opposite directions and each mesh with the outer wheel of one of the plate cylinders. Such an arrangement is only applicable to small installations since the diameter of the intermediate wheels must be equal to the spacing of the printing units.

L'invention a pour objet une nouvelle disposition moins encombrante et moins onéreuse de la commande d'entraînement, qui présente, en outre, l'avantage de combiner les avantages des dispositions connues sans avoir les inconvénients de chacune d'elles.The subject of the invention is a new, less bulky and less expensive arrangement of the drive control, which also has the advantage of combining the advantages of the known arrangements without having the drawbacks of each of them.

Conformément à l'invention, les deux roues intermédiaires sont centrées respectivement chacune sur l'arbre de l'un des cylindres de Blanchet, à côté de la roue d'entraînement de ce dernier, lesdites roues intermédiaires étant montées libres en rotation chacune sur l'arbre qui la porte.In accordance with the invention, the two intermediate wheels are each centered respectively on the shaft of one of the Blanchet cylinders, next to the latter's drive wheel, said intermediate wheels being mounted free in rotation each on the shaft which carries it.

Grâce à cette disposition, il est possible de commander séparément les deux cylindres de Blanchet à partir d'un arbre moteur unique, le mouvement d'entraînement de l'ensemble des cylindres d'un groupe étant, selon l'invention, appliqué sur l'arbre de l'un des cylindres de plaque et transmis aux deux cylindres de Blanchet, d'une part, directement par la roue intérieure calée sur cet arbre et engrenant avec la roue d'entraînement du cylindre de Blanchet correspondant et d'autre part, au second cylindre de Blanchet par la roue extérieure calée sur le même arbre, les deux roues intermédiaires et la roue extérieure du second cylindre de plaque.Thanks to this arrangement, it is possible to order the two Blanchet cylinders separately from a single motor shaft, the drive movement of all the cylinders of a group being, according to the invention, applied to the shaft of one of the plate cylinders and transmitted to the two Blanchet cylinders, on the one hand, directly by the inner wheel wedged on this shaft and meshing with the drive wheel of the corresponding Blanchet cylinder and on the other hand , to the second Blanchet cylinder by the outer wheel fixed on the same shaft, the two intermediate wheels and the outer wheel of the second plate cylinder.

L'invention va maintenant être décrite, en se référant à un mode de réalisation particulier donné à titre d'exemple et représenté sur les dessins annexés.

  • La figure 1 est une vue de face de l'ensemble des pignons d'entraînement d'une installation selon l'invention.
  • La figure 2 est une vue de côté des chaînes cinématiques d'entraînement des deux cylindres de Blanchet, en coupe suivant la ligne A-A de la figure 1.
  • La figure 3 est une vue de détail de l'entraînement des cylindres de plaque et des cylindres de Blanchet.
The invention will now be described, with reference to a particular embodiment given by way of example and shown in the accompanying drawings.
  • Figure 1 is a front view of all drive gears of an installation according to the invention.
  • FIG. 2 is a side view of the drive kinematic chains of the two Blanchet cylinders, in section along the line AA in FIG. 1.
  • Figure 3 is a detailed view of the drive of the plate cylinders and Blanchet cylinders.

Sur la figure 1, on a représenté en vue de face la chaîne cinématique d'entraînement d'une machine d'imprimerie selon l'invention, l'ensemble des rouleaux étant représenté sur la figure 2 en coupe suivant la ligne A-A.In Figure 1, there is shown in front view the drive kinematic chain of a printing machine according to the invention, the set of rollers being shown in Figure 2 in section along the line A-A.

L'ensemble des rouleaux, dont la disposition n'est pas particulière à l'invention, comprend deux cylindres de Blanchet 1 et 2 entre lesquels passe la feuille, et dont les axes sont placés dans un plan légèrement incliné par rapport à l'horizontale. Chaque cylindre de Blanchet 1 ou 2 coopère avec un cylindre de plaque, respectivement 3 et 4.The set of rollers, the arrangement of which is not particular to the invention, comprises two blanket cylinders 1 and 2 between which the sheet passes, and whose axes are placed in a plane slightly inclined relative to the horizontal . Each Blanchet cylinder 1 or 2 cooperates with a plate cylinder, respectively 3 and 4.

Chaque cylindre de plaque 3 ou 4 est associé à une chaîne de rouleaux encreurs, respectivement 5 et 6 dont le rôle est de prendre de l'encre dans une goulotte formant encrier et de l'étaler progressivement de façon à la répartir de façon homogène sur le cylindre de plaque correspondant.Each plate cylinder 3 or 4 is associated with a chain of ink rollers, respectively 5 and 6, the role of which is to take ink from a trough forming an inkwell and to spread it progressively so as to distribute it evenly over the corresponding plate cylinder.

Il est habituel d'entraîner les quatre cylindres et les rouleaux encreurs à partir d'une commande unique et l'ensemble des mécaniques d'entraînement est de préférence placé d'un seul côté des cylindres de façon à laisser l'autre côté libre pour y rassembler l'ensemble des commandes de réglage, à la portée de l'opérateur. C'est pourquoi, de façon habituelle, chaque cylindre et chaque rouleau sont munis, à une extrémité de l'arbre, d'une roue dentée qui engrène avec les roues correspondantes placées aux extrémités des arbres des cylindres ou rouleaux qui l'encadrent, chaque cylindre recevant ainsi son mouvement d'un cylindre voisin et le transmettant à un cylindre (ou rouleau) voisin.It is usual to drive the four cylinders and the ink rollers from a single command and the drive mechanism assembly is preferably placed on one side of the cylinders so as to leave the other side free for collect all the adjustment controls within reach of the operator. This is why, in the usual way, each cylinder and each roller are provided, at one end of the shaft, with a toothed wheel which meshes with the corresponding wheels placed at the ends of the shafts of the cylinders or rollers which frame it, each cylinder thus receiving its movement from a neighboring cylinder and transmitting it to a neighboring cylinder (or roller).

On voit ainsi sur la figure 1 que l'ensemble des cylindres et rouleaux est entraîné par une roue dentée 81 recevant elle-même son mouvement à partir d'un pignon 8 entraîné par un arbre moteur 80.It can thus be seen in FIG. 1 that all of the cylinders and rollers are driven by a toothed wheel 81 which itself receives its movement from a pinion 8 driven by a motor shaft 80.

L'invention se caractérise par une disposition originale des chaînes cinématiques d'entraînement des différents cylindres qui est représentée schématiquement sur la figure 2.The invention is characterized by an original arrangement of the drive kinematic chains of the different cylinders which is shown diagrammatically in FIG. 2.

Comme on l'a indiqué, la figure 2 est une vue développée d'une coupe suivant la ligne A-A et c'est pourquoi les cylindres et les rouleaux sont représentés les uns au-dessus des autres.As indicated, Figure 2 is a developed view of a section along the line A-A and that is why the cylinders and the rollers are shown one above the other.

L'arbre moteur 80 entraîne, par l'intermédiaire d'un réducteur à pignons coniques 8, la roue dentée 81 qui met en mouvement l'ensemble des cylindres et des rouleaux. Ce mouvement est transmis séparément aux deux cylindres de Blanchet par le cylindre de plaque 3 dont l'arbre 30 porte deux roues dentées accolées 31 et 32 centrées dans des plans P1 et P2 et qui constituent les pignons amont des chaînes cinématiques d'entraînement des cylindres de Blanchet.The drive shaft 80 drives, via a bevel gear reducer 8, the toothed wheel 81 which sets in motion all of the cylinders and rollers. This movement is transmitted separately to the two Blanchet cylinders by the plate cylinder 3, the shaft 30 of which carries two joined toothed wheels 31 and 32 centered in planes P 1 and P 2 and which constitute the pinions upstream of the drive kinematic chains. Blanchet cylinders.

La roue dentée 31 placée vers l'intérieur sur l'arbre 30 et par conséquent la plus proche du cylindre de plaque 3, engrène avec une roue dentée 11 calée sur l'arbre 10 du cylindre de Blanchet 1. Ainsi, les deux roues dentées 31 et 11, alignées le long du plan P1 transversal aux axe§ des cylindres, forment une première chaîne cinématique d'entraînement du cylindre de Blanchet 1 à partir de la roue motrice 81. Comme la roue 31 n'engrène qu'avec la roue 11 d'entraînement du cylindre de Blanchet, ces deux pignons peuvent avoir une largeur de dents plus faible que celle de la roue 32 placée vers l'extérieur, à l'extrémité de l'arbre 30 et qui reçoit directement le mouvement de la roue motrice 81 et le transmet au second cylindre de Blanchet 2 par l'intermédiaire d'une seconde chaîne cinématique.The toothed wheel 31 placed inwardly on the shaft 30 and therefore closest to the plate cylinder 3, meshes with a toothed wheel 11 wedged on the shaft 10 of the Blanchet cylinder 1. Thus, the two toothed wheels 31 and 11, aligned along the plane P 1 transverse to the axes of the cylinders, form a first kinematic chain for driving the Blanchet cylinder 1 from the drive wheel 81. As the wheel 31 only meshes with the wheel 11 for driving the Blanchet cylinder, these two pinions may have a smaller width of teeth than that of the wheel 32 placed towards the outside, at the end of the shaft 30 and which directly receives the movement of the drive wheel 81 and transmits it to the second blanket cylinder 2 via a second kinematic chain.

A cet effet, le cylindre de Blanchet 2 porte, calée sur son arbre 20, une roue 21 qui engrène avec une roue dentée 41 calée sur l'arbre du cylindre de plaque 4. Ces deux roues sont centrées dans un plan P3 décalé par rapport au plan Pi, de préférence du côté des cylindres, de façon à permettre la rotation des deux roues 11 et 21. Cependant, l'axe 40 du cylindre de plaque 4 porte une seconde roue extérieure 42 calée en bout d'arbre à côté de la roue intérieure 41 et centrée dans le même plan P2 que la roue 32 calée sur l'arbre du cylindre 3 et engrenant avec la roue motrice 81. Dans le même plan P2 sont centrées les roues intermédiaires qui transmettent le mouvement de la roue 32 à la roue 42 et qui, selon l'invention, sont montées en bout des arbres 10 et 20 des cylindres de Blanchet. Cependant, ces deux roues, respectivement 12 et 22, ne sont pas calées sur les arbres 10 et 20 mais simplement ajustées de façon à être seulement centrées en bout d'arbre mais sans être entraînées en rotation par celui-ci.To this end, the Blanchet cylinder 2 carries, wedged on its shaft 20, a wheel 21 which meshes with a toothed wheel 41 wedged on the shaft of the plate cylinder 4. These two wheels are centered in a plane P 3 offset by relative to the plane P i , preferably on the side of the cylinders, so as to allow the rotation of the two wheels 11 and 21. However, the axis 40 of the plate cylinder 4 carries a second outer wheel 42 wedged at the end of the shaft to side of the inner wheel 41 and centered in the same plane P 2 as the wheel 32 wedged on the shaft of the cylinder 3 and meshing with the driving wheel 81. In the same plane P 2 are centered the intermediate wheels which transmit the movement of the wheel 32 to the wheel 42 and which, according to the invention, are mounted at the end of the shafts 10 and 20 of the Blanchet cylinders. However, these two wheels, respectively 12 and 22, are not wedged on the shafts 10 and 20 but simply adjusted so as to be only centered at the end of the shaft but without being driven in rotation by the latter.

La figure 3 représente plus en détail le mode de montage des roues d'entraînement des cylindres de Blanchet et des cylindres de plaque.FIG. 3 shows in more detail the method of mounting the drive wheels for the Blanchet cylinders and the plate cylinders.

Les différents arbres 10, 20, 30, 40 des cylindres sont portés à leurs extrémités par des paliers 13, 23, 33, 43 montés sur le bâti B de la machine. Sur chaque cylindre, on a représenté schématiquement les bandes de roulement, par exemple 100 et 200 qui s'appuient les unes sur les autres de façon à maintenir l'entraxe des cylindres.The different shafts 10, 20, 30, 40 of the cylinders are carried at their ends by bearings 13, 23, 33, 43 mounted on the frame B of the machine. On each cylinder, there is schematically shown the treads, for example 100 and 200 which rest on each other so as to maintain the center distance of the cylinders.

Dans le bas de la figure 3, on voit le montage des roues 31 et 32 calées à l'extrémité de l'arbre 30 du cylindre de plaque 3 de la façon suivante :In the bottom of FIG. 3, the mounting of the wheels 31 and 32 can be seen wedged at the end of the shaft 30 of the plate cylinder 3 as follows:

Au bout de l'arbre 30, est monté en porte-à-faux un manchon 34 qui est calé sur l'arbre 30 par exemple par un clavetage ou par un système de blocage 35 de type connu.At the end of the shaft 30, a sleeve 34 is mounted in cantilever which is wedged on the shaft 30 for example by a keying or by a locking system 35 of known type.

La roue 31 est centrée sur le manchon 34 et solidarisée en rotation avec ce dernier.The wheel 31 is centered on the sleeve 34 and secured in rotation with the latter.

La roue 32 est munie d'un prolongement 320 qui est ajusté sur une portée de centrage 340 ménagée sur le côté extérieur du manchon 34 et elle est montée coulissante sur ladite portée de façon à pouvoir se déplacer axialement sur une petite distance. Ce déplacement axial est déterminé, de façon connue, par une tige de réglage 7 passant dans un alésage axial ménagé dans l'arbre 3 et munie du côté du mécanisme d'une tête 70 de fixation sur le prolongement 320 de la roue 32 et à son autre extrémité, du côté manoeuvre, d'un bouton de réglage classique non représenté. D'autre part, la roue 32 est solidarisée en ' rotation avec le manchon 34 au moyen de cannelures droites 321. Ainsi, lorsque, au moyen de la tige 7, on commande un déplacement axial de la roue 32, celle-ci reste solidaire en rotation de l'arbre 30 du cylindre de plaque 3 et de la roue 31.The wheel 32 is provided with an extension 320 which is adjusted to a centering surface 340 formed on the outside of the sleeve 34 and it is slidably mounted on said surface so as to be able to move axially over a small distance. This axial displacement is determined, in known manner, by an adjustment rod 7 passing through an axial bore formed in the shaft 3 and provided on the mechanism side with a head 70 for fixing to the extension 320 of the wheel 32 and at its other end, on the operating side, of a conventional adjustment knob not shown. On the other hand, the wheel 32 is secured in rotation with the sleeve 34 by means of straight grooves 321. Thus, when, by means of the rod 7, an axial displacement of the wheel 32 is controlled, the latter remains integral in rotation of the shaft 30 of the plate cylinder 3 and of the wheel 31.

Or, la roue 32 engrène avec la roue motrice 81 et le pignon intermédiaire 12 par l'intermédiaire de dentures hélicoïdales. Par conséquent, le déplacement axial de la roue 32 commande, par appui sur la roue 81, une légère rotation de la roue 32 et de son axe 30. Cette disposition, d'ailleurs connue en soi, permet le réglage de registre du cylindre de plaque 3. Grâce à l'engrènement des roues dentées 11 et 31, cette légère rotation du cylindre de plaque 3 est transmise au cylindre de Blanchet correspondant 1, ce qui permet notamment de maintenir la coïncidence des gorges d'accrochage des habillages des cylindres. En revanche, comme les roues 11 et 21, centrées dans des plans P1 P2 écartés l'un de l'autre, n'engrènent pas l'une dans l'autre, le réglage de registre du cylindre de plaque 3 n'a aucune conséquence sur l'autre cylindre de Blanchet 2.However, the wheel 32 meshes with the drive wheel 81 and the intermediate pinion 12 by means of helical teeth. Consequently, the axial displacement of the wheel 32 controls, by pressing on the wheel 81, a slight rotation of the wheel 32 and of its axis 30. This arrangement, moreover known per se, allows the damper adjustment of the cylinder of plate 3. Thanks to the meshing of the toothed wheels 11 and 31, this slight rotation of the plate cylinder 3 is transmitted to the corresponding Blanchet cylinder 1, which in particular makes it possible to maintain the coincidence of the hooking grooves of the linings of the cylinders. On the other hand, as the wheels 11 and 21, centered in planes P 1 P 2 spaced apart from one another, do not mesh with one another, the damper adjustment of the plate cylinder 3 n ' has no consequence on the other Blanchet 2 cylinder.

Le montage des roues sur les arbres des autres cylindres est effectué de façon analogue. Ainsi, la roue 11 d'entraînement du cylindre 1 est fixée sur un manchon 14 solidaire en rotation de l'arbre 10. Le manchon 14 est muni, vers l'extérieur, d'un prolongement 140 ménageant une portée lisse 141 pour le centrage de la roue intermédiaire 12. Cependant, la roue 12 est simplement ajustée par rapport à la portée 140 mais n'est pas liée en rotation à l'arbre 1. Il en résulte que la roue 12 transmet le mouvement reçu de la roue 32 sans influencer la rotation de l'arbre 1. Il en est de même de la roue 22 centrée sur l'arbre 20 de l'autre cylindre de Blanchet 2.The wheels are mounted on the shafts of the other cylinders in a similar manner. Thus, the wheel 11 for driving the cylinder 1 is fixed on a sleeve 14 integral in rotation with the shaft 10. The sleeve 14 is provided, towards the outside, with an extension 140 providing a smooth range 141 for centering of the intermediate wheel 12. However, the wheel 12 is simply adjusted relative to the bearing 140 but is not linked in rotation to the shaft 1. As a result, the wheel 12 transmits the movement received from the wheel 32 without influence the rotation of the shaft 1. The same applies to the wheel 22 centered on the shaft 20 of the other Blanchet cylinder 2.

L'autre cylindre de plaque 4 porte en bout d'arbre deux roues intérieure et extérieure respectivement 41 et 42 montées d'une façon analogue à celle qui a été décrite pour les roues 31, 32 du cylindre 3, cette disposition comportant notamment un dispositif de réglage de registre connu en soi. Ainsi, par l'intermédiaire des roues intermédiaires 12 et 22, les deux cylindres de plaque 3 et 4 sont entraînés en synchronisme à partir de la roue motrice 81. En revanche, chacun des cylindres de plaque 3, 4 entraîne le cylindre de Blanchet qui lui correspond, respectivement 1 et 2, et le réglage de registre de chaque cylindre de plaque n'a d'influence que sur le cylindre de Blanchet correspondant. Ainsi, chaque cylindre de Blanchet reste totalement indépendant du cylindre de plaque qui ne lui correspond pas.The other plate cylinder 4 carries at the end of the shaft two inner and outer wheels 41 and 42 respectively mounted in a similar manner to that which has been described for the wheels 31, 32 of the cylinder 3, this arrangement comprising in particular a device register adjustment known per se. Thus, via the intermediate wheels 12 and 22, the two plate cylinders 3 and 4 are driven in synchronism from the drive wheel 81. On the other hand, each of the plate cylinders 3, 4 drives the Blanchet cylinder which corresponds to it respectively 1 and 2, and the register setting of each plate cylinder has an influence only on the corresponding Blanchet cylinder. Thus, each Blanchet cylinder remains completely independent of the plate cylinder which does not correspond to it.

Grâce à la disposition selon l'invention, il est donc possible, au moyen d'un dispositif simple et peu encombrant de régler individuellement le registre de chaque cylindre de plaque sans interférence sur le cylindre de Blanchet qui ne lui correspond pas. De plus, on peut agir séparément sur les deux cylindres de Blanchet, par exemple en réglant la tension de la toile caoutchoutée qui se traduit par une variation légère du diamètre du Blanchet. Cette variation de diamètre n'a pas d'importance pour la coïncidence du Blanchet avec le cylindre de plaque qui lui correspond puisque le diamètre du Blanchet au point de tangence est fixé par celui de la plaque sur laquelle il s'appuie.Thanks to the arrangement according to the invention, it is therefore possible, by means of a simple and space-saving device to individually adjust the register of each plate cylinder without interference on the Blanchet cylinder which does not correspond to it. In addition, one can act separately on the two Blanchet cylinders, for example by adjusting the tension of the rubberized fabric which results in a slight variation in the diameter of the Blanchet. This variation in diameter does not matter for the coincidence of the Blanchet with the plate cylinder which corresponds to it since the diameter of the Blanchet at the point of tangency is fixed by that of the plate on which it rests.

On pourra également jouer sur les épaisseurs des habillages des Blanchets pour régler le degré d'écrasement de l'habillage en fonction de la qualité de ce dernier et de l'épaisseur du papier.We can also play on the thicknesses of the coverings of the blankets to adjust the degree of crushing of the cover depending on the quality of the latter and the thickness of the paper.

En outre, du fait de l'absence de liaison directe entre les deux cylindres de Blanchet, il sera possible de faire en sorte que les dentures d'entraînement soient toujours en appui l'une sur l'autre dans le sens d'entraînement. En effet, du fait de l'écrasement de l'habillage, le cylindre de Blanchet a toujours un diamètre légèrement plus grand que le cylindre de plaque. Par conséquent, entre le cylindre de Blanchet et le cylindre de plaque correspondant, les dentures sont appliquées dans le sens de transmission de la puissance. Cependant, dans le montage en série classique, l'un des cylindres de Blanchet est entraîné par l'autre et entraîne à son tour le cylindre de plaque correspondant. La condition d'appui des dentures ne peut donc être respectée de la même façon et au contraire, il y a une fluctuation de cylindres à cylindres et une possibilité d'accumulation des jeux qui peut déterminer la formation de stries sur la feuille. Dans la disposition selon l'invention, au contraire, le jeu des dentures est rattrapé automatiquement étant donné que celles-ci sont toujours en contact l'une avec l'autre dans le sens d'entraînement.In addition, due to the absence of direct connection between the two Blanchet cylinders, it will be possible to ensure that the drive teeth are always in contact with one another in the drive direction. Indeed, due to the crushing of the covering, the Blanchet cylinder always has a slightly larger diameter than the plate cylinder. Consequently, between the Blanchet cylinder and the corresponding plate cylinder, the teeth are applied in the direction of power transmission. However, in the classic series assembly, one of the Blanchet cylinders is driven by the other and in turn drives the corresponding plate cylinder. The support condition of the teeth can therefore not be respected in the same way and on the contrary, there is a fluctuation from cylinder to cylinder and a possibility of accumulation of clearances which can determine the formation of streaks on the sheet. In the arrangement according to the invention, on the contrary, the play of the teeth is automatically taken up since they are always in contact with each other in the drive direction.

Bien entendu, comme on l'a représenté schématiquement sur les figures, chacun des cylindres de plaque 3 ou 4 est associé à un ensemble de rouleaux encreurs 5 ou 6 qui sont entraînés à partir du cylindre de plaque correspondant par l'intermédiaire d'un embrayage.Of course, as shown schematically in the figures, each of the plate cylinders 3 or 4 is associated with a set inking rollers 5 or 6 which are driven from the corresponding plate cylinder by means of a clutch.

Ainsi, dans la disposition selon l'invention, chacun des cylindres de plaque constitue l'élément moteur pour tous les éléments qui lui sont associés, les deux cylindres de plaque étant entraînés à partir du même arbre moteur.Thus, in the arrangement according to the invention, each of the plate cylinders constitutes the driving element for all the elements associated with it, the two plate cylinders being driven from the same driving shaft.

Claims (5)

1. Device for controlling the drive of the cylinders of a printing machine using the offset process, comprising a pair of blanket cylinders (1, 2) each associated with a plate cylinder (3, 4) and with an assembly of inking rollers, the said cylinders bearing on one another by means of running strips located at their ends for maintaining the interaxial distances, each being driven by means of spur wheels, each plate cylinder (3) (4) carrying two coupled wheels wedged at the end of shafts, respectively an inner wheel (31) (41) which engages with a wheel (11) (21) for driving the corresponding blanket cylinder (1) (2), wedged on the shaft of the latter, and an outer wheel (32) (42) receiving the drive movement, the two outer wheels (32) (42) being connected to one another by two intermediate wheels (12) (22) engaging in one another, characterised in that the two intermediate wheels (12) (22) are each centred respectively on the shaft (10) (20) of one of the blanket cylinders (1) (2) next to the drive wheel (11) (21) for the latter, each of the said intermediate wheels (12) (22) being mounted so as to rotate freely on the shaft (10) (20) which carries it.
2. Control device according to Claim 1, characterised in that the drive movement for all the cylinders is applied to the shaft (30) of one of the plate cylinders (3) and is transmitted separately to each of the two blanket cylinders (1) (2), on one hand to the first cylinder (1) directly via the inner wheel (31) wedged on this shaft (30) and engaging with the drive wheel (11) of the corresponding blanket cylinder (1), and on the other hand to the drive wheel (21) of the second blanket cylinder (2) via the outer wheel (32) wedged on the same shaft (30), the two intermediate wheels (12) (22), the outer wheel (42) and then the inner wheel (41) wedged on the shaft (40) of the second plate cylinder (4).
3. Control device according to Claim 1, characterised in that each intermediate wheel (12) (22) is simply fitted on the shaft (10) (20) carrying it in such a way as to be merely centred at the end of the shaft without being driven in rotation by the latter.
4. Control device according to Claim 1, characterised in that the drive movement is applied from a drive shaft (80) to a drive wheel (81) engaging with the outer wheel (32) of one of the plate cylinders (3), the inner wheel (31) having a smaller tooth width than the outer wheel (32).
5. Control device according to Claim 2, characterised in that the drive wheel (11) of each blanket cylinder (1) is fastened to a bush (14) fixed in rotation to the shaft (10) of the cylinder (1), the latter being provided towards the outside with a prolongation (140) forming a smooth bearing (141) on which the corresponding intermediate wheel (12) is centred with a simple fit.
EP19800400792 1979-06-08 1980-06-03 Device for controlling the cylinders of an offset printing press Expired EP0022381B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7914766 1979-06-08
FR7914766A FR2458395A1 (en) 1979-06-08 1979-06-08 DEVICE FOR CONTROLLING CYLINDERS OF OFFSET PRINTER MACHINE

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Publication Number Publication Date
EP0022381A1 EP0022381A1 (en) 1981-01-14
EP0022381B1 true EP0022381B1 (en) 1983-07-13

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EP19800400792 Expired EP0022381B1 (en) 1979-06-08 1980-06-03 Device for controlling the cylinders of an offset printing press

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EP (1) EP0022381B1 (en)
DE (2) DE3064103D1 (en)
FR (1) FR2458395A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8109472U1 (en) * 1981-03-31 1981-08-13 Heidelberger Druckmaschinen Ag, 6900 Heidelberg "MAIN DRIVE FOR ROTATIONAL OFFSET PRINTING MACHINES"
DE19629605C2 (en) * 1996-07-23 2000-02-03 Koenig & Bauer Ag Drive a printing unit

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2014753C3 (en) * 1970-03-26 1974-01-10 Roland Offsetmaschinenfabrik Faber & Schleicher Ag, 6050 Offenbach Drive of a rotary printing press
DE2637795C2 (en) * 1976-08-21 1981-12-24 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Main drive for web-fed offset printing machines

Also Published As

Publication number Publication date
EP0022381A1 (en) 1981-01-14
FR2458395B1 (en) 1983-08-05
DE3064103D1 (en) 1983-08-18
FR2458395A1 (en) 1981-01-02
DE8014985U1 (en) 1980-09-04

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