EP1754599B1 - Printing unit with blanket cylinder movable between a throw-on and a throw-off position and corresponding printing press - Google Patents

Printing unit with blanket cylinder movable between a throw-on and a throw-off position and corresponding printing press Download PDF

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Publication number
EP1754599B1
EP1754599B1 EP06291311A EP06291311A EP1754599B1 EP 1754599 B1 EP1754599 B1 EP 1754599B1 EP 06291311 A EP06291311 A EP 06291311A EP 06291311 A EP06291311 A EP 06291311A EP 1754599 B1 EP1754599 B1 EP 1754599B1
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EP
European Patent Office
Prior art keywords
cylinder
blanket cylinder
blanket
plate
unit according
Prior art date
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Not-in-force
Application number
EP06291311A
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German (de)
French (fr)
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EP1754599A3 (en
EP1754599A2 (en
Inventor
Jilani Chrigui
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Goss International Montataire SA
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Goss International Montataire SA
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Publication of EP1754599A3 publication Critical patent/EP1754599A3/en
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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/24—Cylinder-tripping devices; Cylinder-impression adjustments
    • B41F13/26—Arrangement of cylinder bearings
    • B41F13/32—Bearings mounted on swinging supports

Definitions

  • the present invention relates to a printing unit according to the preamble of claim 1.
  • the invention applies in particular to offset presses, for example for the printing of labors.
  • the off-pressure position makes it possible, for example, to change the blanket of the blanket cylinder. This position is also referred to as "throw-off" in English.
  • the press-in position allows the printing unit to print the paper web that passes between the pressure roll and the blanket cylinder. This position is also referred to as "throw-on" in English.
  • the blanket cylinder can generally occupy an intermediate position between its non-pressure and in-pressure positions. In this position, which ensures the change of plates, the blanket cylinder is applied against the plate cylinder and remains spaced from the pressure cylinder.
  • the non-pressure position and the plate changing position allow the paper web to pass between the blanket cylinder and the pressure cylinder and thus pass through the printing unit which is stopped.
  • the paper web may at the same time continue to be printed by other printing units.
  • Such a press is generally referred to as an "Auto Transfer” press.
  • FR-2 787 059 discloses a double printing unit in which the plate and blanket cylinders are each carried by levers articulated on the frame at eccentric points of the central axes of the cylinders.
  • Printing units are also known in which the ends of the rolls are received in eccentric bearings in order to move them to reach the previously mentioned positions.
  • US-6,019,039 finally describes a printing unit of the aforementioned type.
  • the main rod is movable with an eccentric movement with respect to the axis of the plate cylinder.
  • a displacement of the main link relative to the frame always modifies the distance between the axes of the blanket cylinder and plate holder.
  • This kinematics is therefore complex to implement, especially if one had to maintain the plate and blanket cylinders against each other to reach a plate change position.
  • An object of the invention is to solve this problem by providing a printing unit of the aforementioned type where the movement kinematics of the cylinders is simpler and easier to implement.
  • the subject of the invention is a printing unit according to claim 1.
  • the unit may comprise one or more of the features of dependent claims 2 to 12, taken alone or in any technically possible combination.
  • the invention also relates to a printing press, characterized in that it comprises at least one printing unit as defined above.
  • the figure 1 illustrates an offset rotary press 1 for printing a strip of paper 3.
  • the passage of the strip 3 is horizontal, that is to say that it will move horizontally, for example from the left to the right, under the action of various conventional equipment not shown.
  • the press 1 will comprise several printing units arranged one after the other along the path of the web 3, for example eight printing units intended for example, to be printed in black, cyan, yellow and in magenta. All or only some of the press printing units 1 can have the structure of the unit 5 which will now be described.
  • the unit 5 is a dual printing unit which comprises two printing units 7A and 7B arranged one above the other.
  • the lower printing unit 7A and the upper printing unit 7B have similar structures so that only that of the group 7A will be described in detail later and the structural differences between the groups 7A and 7B will be reported.
  • the numerical references used for groups 7A and 7B will be distinguished by the use of suffixes A and B.
  • This frame 25, of which only parts have been schematically represented on the figures 1 and 2 typically comprises two side walls 27 ( fig.2 ) each disposed on one side of the printing unit 5 and between which the cylinders 9A, 9B, 11A and 11B are arranged.
  • the lateral ends 29A of the plate cylinder 9A are rotatably received in bearings 31A provided in the side walls 27 of the frame 25.
  • the plate cylinder 9A can rotate about its central axis A9A under the action of the motor 21A, as described later.
  • the mechanism 23A for supporting the blanket cylinder 11A comprises two sets 32A arranged on either side of the lower printing unit 7A. Only the assembly 32A visible on the figures 1 and 2 will be described later, the other having a symmetrical structure with respect to a vertical and median plane of the printing unit 5.
  • the assembly 32A comprises a main connecting rod 33A and an auxiliary connecting rod 35A.
  • the main connecting rods 33A and 35A auxiliary form a left-facing elbow on the figure 1 . It will be observed that the elbow formed by the main connecting rods 33B and auxiliary 35B is oriented in the opposite direction.
  • the lower end 37A of the main link 33A is rotatably mounted on the corresponding end 29A of the plate cylinder 9A, for example by means of a cylindrical roller bearing 39A ( figure 2 ).
  • the main link 33A can pivot about the central axis A9A of the plate cylinder 9A between an upright position ( figure 1 ) and an inclined position ( figures 3 and 4 ).
  • the upper end 41A of the main link 33A is articulated to the lower end 43A of the auxiliary link 35A by a pivot 45A.
  • the auxiliary linkage 35A can pivot relative to the main link 33A, about an axis parallel to the central axes A9A and A11A of the cylinders 9A and 11A, between a retracted position ( figures 1 and 3 ) and an extended position ( figure 4 ).
  • the upper end 47A of the auxiliary link 35A receives the corresponding end 49A of the blanket cylinder 11A rotating through a bearing 51A.
  • the blanket cylinder 11A can rotate relative to the auxiliary link 35A about its central axis A11A.
  • the assembly 32A also comprises a member 53A for moving the main link 33A.
  • This is in the example shown a pneumatic cylinder.
  • This cylinder 53A is interposed between the frame 25 and the main rod 33A.
  • the assembly 32A also comprises a member 55A for moving the auxiliary link 35A.
  • a member 55A for moving the auxiliary link 35A This is in the example shown a pneumatic cylinder which is connected to the connecting rods 33A and 35A.
  • This jack 55A is doubled with a device 57A elastic return of the auxiliary link 35A in its deployed position. It is in the example shown a spring bearing on the connecting rods 33A and 35A and surrounding for example the cylinder 55A.
  • the mechanism 23A is therefore deformable between a gap configuration ( figure 4 ) and a configuration of approaching the axes A9A and A11A of the cylinders 9A and 11A ( figures 1 and 3 ).
  • the blanket cylinder 11A can occupy three positions illustrated by the figures 1 , 3 and 4 .
  • the blanket cylinders 11A and 11B occupy simultaneously the same position, even if in practice the movements of these cylinders are independent.
  • the first position is the so-called pressure position and is illustrated by the figure 1 .
  • the main rod 33A is upright and the auxiliary link 35A in the retracted position.
  • the mechanism 23A is in the approaching position of the axes A9A and A11A.
  • the blanket cylinder 11A is then applied against the plate cylinder 9A and against the blanket cylinder 11B.
  • the blanket cylinder 11B thus acts as a pressure cylinder for the blanket cylinder 11A and vice versa.
  • the unit 5 can then print the paper web 3 which passes between the rolls 11A and 11B at a pinch point 59 ("nip" in English).
  • the motors 21A and 21B drive the cylinders 9A, 9B, 11A and 11B in rotation around their respective central axes.
  • This training can be ensured for example by means of spur gears meshing with each other.
  • a pinion integral in rotation with the output shaft of the motor 21A can mesh with a pinion integral with the plate cylinder 9A which meshes with a pinion integral with the blanket cylinder 11A.
  • the blanket cylinder 11A is then rotated about its axis A11A through the plate cylinder 9A.
  • the same motors 21A and 21B can also provide rotational drive of the inking systems 13A and 13B (not shown) and the humidification systems 17A and 17B (not shown).
  • the plate or plates carried by the plate cylinders 9A and 9B are moistened and inked by the systems 13A and 17A. These plates decode the ink from their printer regions on the blankets carried by the rolls 11A and 11B, which offset the ink on the strip 3, which is thus printed on both sides.
  • the elastic return devices 57A and 57B ensure, during the operation of the unit 5, the pressurization of the blanket cylinders 11A and 11B against each other and also absorb the energies of the vibrations likely to 'appear.
  • the blanket cylinder 11A In its second position, illustrated by the figure 3 , the blanket cylinder 11A is spaced from the band 3. It is no longer applied against the blanket cylinder 11B.
  • the blanket cylinder 11A and the blanket cylinder 11B which is also in second position on the figure 3 .
  • This space allows the band to pass freely between the blanket cylinders 11A and 11B without touching them.
  • the height G1 of this space is about 30mm. More generally, the height G1 is greater than the deflection of the band 3, resulting from its voltage and its physical characteristics, added to the amplitudes of vibrations that result from the excitations of the press.
  • This second position in which the unit 5 is out of service, makes it possible, for example, to remove or set up the plates on the plate cylinders 9A and 9B, for example by a manual, automatic or semi-manual process. -automatic.
  • the blanket cylinder 11A In the third position illustrated by the figure 4 , said off-pressure position, the blanket cylinder 11A is spaced from the plate cylinder 9A. This spacing was obtained by passing the auxiliary links 35A in their deployed position, and therefore the mechanism 23A in its spacing configuration axes A9A and A11A. The space delimited between the blanket cylinders 11A and 11B, when in their third positions, can then have a height of about 25mm. This third position can be used to ensure the change of the blankets carried by the cylinders 11A and 11B.
  • the displacement of the blanket cylinders 11A and 11B between their first and third positions is effected in particular by rotation around the axes A9A and A9B of the plate cylinders 9A and 9B, which greatly simplifies the kinematics.
  • the transition from the pressure position to the plate change position is effected by simple rotation of the main rods.
  • the axes A9A and A9B remain fixed during these movements, it is not necessary to change the position of the rollers 15A and 19A or those of the motors 21A and 21B.
  • the movements of the cylinders 11A and 11B therefore do not risk causing disturbances of the inking systems 13A and 13B and humidification 17A and 17B and it is not necessary to make expensive arrangements to prevent such disturbances.
  • this type of displacement makes it possible to reach relatively large space heights G1 and G2, ensuring that the strip 3 will not be in contact with the blanket cylinders 11A and 11B in second and third positions, without the need for a device. additional guidance.
  • the main link 33A can carry the blanket cylinder 11A via other elements than auxiliary links 35A.
  • FIG 5 illustrates a second embodiment in which the support mechanisms 23A and 23B are less bulky.
  • the auxiliary links 35A and 35B have been replaced by bodies 61A and 61B which rotate the ends 49A and 49B of the blanket cylinders 11A and 11B.
  • These blocks 61A and 61B are movable in translation respectively along the connecting rods 33A and 33B to move the blanket cylinders 11A and 11B between their second and third positions.
  • the figure 6 illustrates yet another embodiment in which the blocks 61A and 61B are replaced by eccentric bearings 71A and 71B inserted in the main rods 33A and 33B and to change from the plate change position to the in-pressure position.
  • Such simple units comprise only a printing unit provided with a plate cylinder and a blanket cylinder, as well as a pressure cylinder on which the blanket cylinder is applied in the internal position. pressure.

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

Description

La présente invention concerne une unité d'impression selon le préambule de la revendication 1.The present invention relates to a printing unit according to the preamble of claim 1.

L'invention s'applique en particulier à des presses offset, par exemple pour l'impression de labeurs.The invention applies in particular to offset presses, for example for the printing of labors.

La position hors-pression permet par exemple de changer le blanchet du cylindre porte-blanchet. Cette position est également désignée « throw-off » en anglais.The off-pressure position makes it possible, for example, to change the blanket of the blanket cylinder. This position is also referred to as "throw-off" in English.

La position en-pression permet à l'unité d'impression d'imprimer la bande de papier qui passe entre le cylindre de pression et le cylindre porte-blanchet. Cette position est également désignée « throw-on » en anglais.The press-in position allows the printing unit to print the paper web that passes between the pressure roll and the blanket cylinder. This position is also referred to as "throw-on" in English.

Outre les deux positions, le cylindre porte-blanchet peut généralement occuper une position intermédiaire entre ses positions hors-pression et en-pression. Dans cette position, qui permet d'assurer le changement de plaques, le cylindre porte-blanchet est appliqué contre le cylindre porte-plaque et reste espacé du cylindre de pression.In addition to the two positions, the blanket cylinder can generally occupy an intermediate position between its non-pressure and in-pressure positions. In this position, which ensures the change of plates, the blanket cylinder is applied against the plate cylinder and remains spaced from the pressure cylinder.

La position hors-pression ainsi que la position de changement de plaques, permettent à la bande de papier de passer entre le cylindre porte-blanchet et le cylindre de pression et ainsi de traverser l'unité d'impression qui est à l'arrêt. La bande de papier peut dans le même temps continuer à être imprimée par d'autres unités d'impression.The non-pressure position and the plate changing position allow the paper web to pass between the blanket cylinder and the pressure cylinder and thus pass through the printing unit which is stopped. The paper web may at the same time continue to be printed by other printing units.

Cela permet d'assurer au sein d'une même presse d'impression un travail d'impression grâce à certaines unités, tandis que d'autres unités à l'arrêt sont préparées pour le travail d'impression suivant.This makes it possible to print jobs within the same printing press by means of certain units, while other units that are stationary are prepared for the next printing job.

Une telle presse est généralement qualifiée de presse « Auto Transfer ».Such a press is generally referred to as an "Auto Transfer" press.

US- 5 690 029 et EP - 1 378 351 décrivent des unités d'impression où le passage en configuration hors-pression est assuré grâce à des leviers qui pivotent autour d'axes excentrés par rapport aux cylindres porte-plaque. US 5,690,029 and EP - 1,378,351 describe printing units where the passage in non-pressure configuration is ensured by means of levers which pivot about eccentric axes with respect to the plate cylinders.

De même dans US- 3 964 387 , le passage en position inactive est assuré par pivotement de leviers excentrés par rapport aux cylindres porte-plaque.Similarly in US 3,964,387 , the passage in the inactive position is provided by pivoting eccentric levers relative to the plate cylinders.

FR-2 787 059 décrit une unité double d'impression dans laquelle les cylindres porte-plaque et porte-blanchet sont chacun portés par des leviers articulés sur le bâti en des points excentrés des axes centraux des cylindres. FR-2 787 059 discloses a double printing unit in which the plate and blanket cylinders are each carried by levers articulated on the frame at eccentric points of the central axes of the cylinders.

Le déplacement de tous les leviers permet d'atteindre les positions mentionnées précédemment.The movement of all the levers makes it possible to reach the positions mentioned previously.

On connaît également des unités d'impression dans lesquelles les extrémités des cylindres sont reçues dans des paliers excentriques afin de les déplacer pour atteindre les positions mentionnées précédemment.Printing units are also known in which the ends of the rolls are received in eccentric bearings in order to move them to reach the previously mentioned positions.

US-6 019 039 décrit enfin une unité d'impression du type précité. La bielle principale est mobile avec un mouvement excentrique par rapport à l'axe du cylindre porte-plaque. Ainsi, un déplacement de la bielle principale par rapport au bâti modifie toujours la distance entre les axes des cylindres porte-blanchet et porte-plaque. Cette cinématique est donc complexe à mettre en oeuvre, notamment si l'on devait maintenir les cylindres porte-plaque et porte-blanchet l'un contre l'autre pour atteindre une position de changement de plaque. US-6,019,039 finally describes a printing unit of the aforementioned type. The main rod is movable with an eccentric movement with respect to the axis of the plate cylinder. Thus, a displacement of the main link relative to the frame always modifies the distance between the axes of the blanket cylinder and plate holder. This kinematics is therefore complex to implement, especially if one had to maintain the plate and blanket cylinders against each other to reach a plate change position.

Un but de l'invention est de résoudre ce problème en fournissant une unité d'impression du type précité où la cinématique de déplacement des cylindres est plus simple et plus facile à mettre en oeuvre.An object of the invention is to solve this problem by providing a printing unit of the aforementioned type where the movement kinematics of the cylinders is simpler and easier to implement.

A cet effet, l'invention a pour objet une unité d'impression selon la revendication 1.For this purpose, the subject of the invention is a printing unit according to claim 1.

Selon des modes particuliers de réalisation, l'unité peut comprendre l'une ou plusieurs des caractéristiques des revendications dépendantes 2 à 12, prise(s) isolément ou selon toutes les combinaisons techniquement possibles.According to particular embodiments, the unit may comprise one or more of the features of dependent claims 2 to 12, taken alone or in any technically possible combination.

L'invention a également pour objet une presse d'impression, caractérisée en ce qu'elle comprend au moins une unité d'impression telle que définie ci-dessus.The invention also relates to a printing press, characterized in that it comprises at least one printing unit as defined above.

L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple, et faite en se référant aux dessins annexés, sur lesquels :

  • la figure 1 est une vue latérale schématique d'une unité d'impression d'une presse rotative à bande selon un premier mode de réalisation de l'invention, les cylindres porte-blanchet étant en position en-pression,
  • la figure 2 est une vue partielle, schématique et en coupe prise suivant la ligne brisée II-II de la figure 1,
  • les figures 3 et 4 sont des vues analogues à la figure 1, illustrant les cylindres porte-blanchet respectivement en position de changement de plaque et en position hors-pression, et
  • les figures 5 et 6 sont des vues analogues à la figure 1, illustrant des deuxième et troisième modes de réalisation de l'invention.
The invention will be better understood on reading the description which follows, given solely by way of example, and with reference to the appended drawings, in which:
  • the figure 1 is a schematic side view of a printing unit of a rotary web press according to a first embodiment of the invention, the blanket cylinders being in the in-pressure position,
  • the figure 2 is a partial schematic sectional view along the broken line II-II of the figure 1 ,
  • the figures 3 and 4 are similar views to the figure 1 , illustrating the blanket cylinders respectively in the plate change position and in the non-pressure position, and
  • the figures 5 and 6 are similar views to the figure 1 , illustrating second and third embodiments of the invention.

La figure 1 illustre une presse rotative offset 1 destinée à imprimer une bande de papier 3. Dans l'exemple représenté, le passage de la bande 3 est horizontal, c'est-à-dire qu'elle va se déplacer horizontalement, par exemple de la gauche vers la droite, sous l'action de divers équipements classiques non-représentés.The figure 1 illustrates an offset rotary press 1 for printing a strip of paper 3. In the example shown, the passage of the strip 3 is horizontal, that is to say that it will move horizontally, for example from the left to the right, under the action of various conventional equipment not shown.

Sur la figure 1, une seule unité d'impression 5 de la presse 1 est représentée. Typiquement, la presse 1 comprendra plusieurs unités d'impression disposées les unes à la suite des autres le long du trajet de la bande 3, par exemple huit unités d'impression destinées par exemple, à imprimer en noir, en cyan, en jaune et en magenta. Toutes les unités d'impression de la presse 1, ou seulement certaines, peuvent avoir la structure de l'unité 5 qui va maintenant être décrite.On the figure 1 only one printing unit 5 of the press 1 is shown. Typically, the press 1 will comprise several printing units arranged one after the other along the path of the web 3, for example eight printing units intended for example, to be printed in black, cyan, yellow and in magenta. All or only some of the press printing units 1 can have the structure of the unit 5 which will now be described.

Comme illustré par les figures 1 et 2, l'unité 5 est une unité d'impression double qui comprend deux groupes d'impression 7A et 7B disposés l'un au-dessus de l'autre.As illustrated by figures 1 and 2 , the unit 5 is a dual printing unit which comprises two printing units 7A and 7B arranged one above the other.

Le groupe d'impression inférieur 7A et le groupe d'impression supérieur 7B ont des structures analogues de sorte que seule celle du groupe 7A sera décrite en détail par la suite et les différences de structure entre les groupes 7A et 7B seront signalées. Les références numériques utilisées pour les groupes 7A et 7B se distingueront par l'emploi des suffixes A et B.The lower printing unit 7A and the upper printing unit 7B have similar structures so that only that of the group 7A will be described in detail later and the structural differences between the groups 7A and 7B will be reported. The numerical references used for groups 7A and 7B will be distinguished by the use of suffixes A and B.

Le groupe d'impression 7A comprend principalement :

  • un cylindre porte-plaque 9A,
  • un cylindre porte-blanchet 11A,
  • un système d'encrage 13A dont seuls les rouleaux 15A en contact avec le cylindre porte-plaque 9A ont été représentés,
  • un système de mouillage 17A dont seul le rouleau 19A en contact avec le cylindre porte-plaque 9A a été représenté,
  • un moteur d'entraînement 21A, et
  • un mécanisme 23A de support du cylindre porte-blanchet 11A.
The printing group 7A mainly comprises:
  • a plate cylinder 9A,
  • a blanket cylinder 11A,
  • an inking system 13A of which only the rollers 15A in contact with the plate cylinder 9A have been represented,
  • a wetting system 17A of which only the roller 19A in contact with the plate cylinder 9A has been represented,
  • a drive motor 21A, and
  • a mechanism 23A for supporting the blanket cylinder 11A.

Ces différents éléments sont portés par le bâti 25 de l'unité d'impression 5.These different elements are carried by the frame 25 of the printing unit 5.

Ce bâti 25, dont seules des parties ont été schématiquement représentées sur les figures 1 et 2, comprend typiquement deux parois latérales 27 (fig.2) disposées chacune d'un côté de l'unité d'impression 5 et entre lesquelles les cylindres 9A, 9B, 11A et 11 B sont disposés.This frame 25, of which only parts have been schematically represented on the figures 1 and 2 typically comprises two side walls 27 ( fig.2 ) each disposed on one side of the printing unit 5 and between which the cylinders 9A, 9B, 11A and 11B are arranged.

Les extrémités latérales 29A du cylindre porte-plaque 9A, dont une seule est visible sur la figure 2, sont reçues à rotation dans des roulements 31A prévus dans les parois latérales 27 du bâti 25. Ainsi, le cylindre porte-plaque 9A peut tourner autour de son axe central A9A sous l'action du moteur 21A, comme décrit ultérieurement.The lateral ends 29A of the plate cylinder 9A, only one of which is visible on the figure 2 , are rotatably received in bearings 31A provided in the side walls 27 of the frame 25. Thus, the plate cylinder 9A can rotate about its central axis A9A under the action of the motor 21A, as described later.

Le mécanisme 23A de support du cylindre porte-blanchet 11A comporte deux ensembles 32A disposés de part et d'autre du groupe d'impression inférieur 7A. Seul l'ensemble 32A visible sur les figures 1 et 2 sera décrit par la suite, l'autre ayant une structure symétrique par rapport à un plan vertical et médian de l'unité d'impression 5.The mechanism 23A for supporting the blanket cylinder 11A comprises two sets 32A arranged on either side of the lower printing unit 7A. Only the assembly 32A visible on the figures 1 and 2 will be described later, the other having a symmetrical structure with respect to a vertical and median plane of the printing unit 5.

L'ensemble 32A comprend une bielle principale 33A et une bielle auxiliaire 35A. Les bielles principale 33A et auxiliaire 35A forment un coude orienté vers la gauche sur la figure 1. On observera que le coude formé par les bielles principale 33B et auxiliaire 35B est orienté à l'opposé.The assembly 32A comprises a main connecting rod 33A and an auxiliary connecting rod 35A. The main connecting rods 33A and 35A auxiliary form a left-facing elbow on the figure 1 . It will be observed that the elbow formed by the main connecting rods 33B and auxiliary 35B is oriented in the opposite direction.

L'extrémité inférieure 37A de la bielle principale 33A est montée à rotation sur l'extrémité 29A correspondante du cylindre porte-plaque 9A, grâce par exemple à un roulement 39A à rouleaux cylindriques (figure 2).The lower end 37A of the main link 33A is rotatably mounted on the corresponding end 29A of the plate cylinder 9A, for example by means of a cylindrical roller bearing 39A ( figure 2 ).

Ainsi, la bielle principale 33A peut pivoter autour de l'axe central A9A du cylindre porte-plaque 9A entre une position dressée (figure 1) et une position inclinée (figures 3 et 4).Thus, the main link 33A can pivot about the central axis A9A of the plate cylinder 9A between an upright position ( figure 1 ) and an inclined position ( figures 3 and 4 ).

L'extrémité supérieure 41A de la bielle principale 33A est articulée à l'extrémité inférieure 43A de la bielle auxiliaire 35A par un pivot 45A. Ainsi, la bielle auxiliaire 35A peut pivoter par rapport à la bielle principale 33A, autour d'un axe parallèle aux axes centraux A9A et A11A des cylindres 9A et 11A, entre une position rétractée (figures 1 et 3) et une position déployée (figure 4).The upper end 41A of the main link 33A is articulated to the lower end 43A of the auxiliary link 35A by a pivot 45A. Thus, the auxiliary linkage 35A can pivot relative to the main link 33A, about an axis parallel to the central axes A9A and A11A of the cylinders 9A and 11A, between a retracted position ( figures 1 and 3 ) and an extended position ( figure 4 ).

L'extrémité supérieure 47A de la bielle auxiliaire 35A reçoit l'extrémité 49A correspondante du cylindre porte-blanchet 11A à rotation par l'intermédiaire d'un roulement 51A. Ainsi, le cylindre porte-blanchet 11A peut tourner par rapport à la bielle auxiliaire 35A autour de son axe central A11A.The upper end 47A of the auxiliary link 35A receives the corresponding end 49A of the blanket cylinder 11A rotating through a bearing 51A. Thus, the blanket cylinder 11A can rotate relative to the auxiliary link 35A about its central axis A11A.

L'ensemble 32A comprend également un organe 53A de déplacement de la bielle principale 33A. Il s'agit dans l'exemple représenté d'un vérin pneumatique. Ce vérin 53A est interposé entre le bâti 25 et la bielle principale 33A.The assembly 32A also comprises a member 53A for moving the main link 33A. This is in the example shown a pneumatic cylinder. This cylinder 53A is interposed between the frame 25 and the main rod 33A.

L'ensemble 32A comprend également un organe 55A de déplacement de la bielle auxiliaire 35A. Il s'agit dans l'exemple représenté d'un vérin pneumatique qui est relié aux bielles 33A et 35A.The assembly 32A also comprises a member 55A for moving the auxiliary link 35A. This is in the example shown a pneumatic cylinder which is connected to the connecting rods 33A and 35A.

Ce vérin 55A est doublé d'un dispositif 57A de rappel élastique de la bielle auxiliaire 35A dans sa position déployée. Il s'agit dans l'exemple représenté d'un ressort prenant appui sur les bielles 33A et 35A et entourant par exemple le vérin 55A.This jack 55A is doubled with a device 57A elastic return of the auxiliary link 35A in its deployed position. It is in the example shown a spring bearing on the connecting rods 33A and 35A and surrounding for example the cylinder 55A.

Le mécanisme 23A est donc déformable entre une configuration d'écartement (figure 4) et une configuration de rapprochement des axes A9A et A11A des cylindres 9A et 11A (figures 1 et 3).The mechanism 23A is therefore deformable between a gap configuration ( figure 4 ) and a configuration of approaching the axes A9A and A11A of the cylinders 9A and 11A ( figures 1 and 3 ).

Ainsi, le cylindre porte-blanchet 11A peut occuper trois positions illustrées par les figures 1, 3 et 4. Sur chacune de ces figures, les cylindres porte-blanchet 11A et 11B occupent simultanément la même position, même si en pratique les déplacements de ces cylindres sont indépendants.Thus, the blanket cylinder 11A can occupy three positions illustrated by the figures 1 , 3 and 4 . In each of these figures, the blanket cylinders 11A and 11B occupy simultaneously the same position, even if in practice the movements of these cylinders are independent.

La première position est la position dite en-pression et est illustrée par la figure 1. La bielle principale 33A est en position dressée et la bielle auxiliaire 35A en position rétractée. Le mécanisme 23A est en position de rapprochement des axes A9A et A11A. Le cylindre porte-blanchet 11A est alors appliqué contre le cylindre porte-plaque 9A ainsi que contre le cylindre porte-blanchet 11B. Le cylindre porte-blanchet 11B joue donc le rôle de cylindre de pression pour le cylindre porte-blanchet 11A et vice-versa.The first position is the so-called pressure position and is illustrated by the figure 1 . The main rod 33A is upright and the auxiliary link 35A in the retracted position. The mechanism 23A is in the approaching position of the axes A9A and A11A. The blanket cylinder 11A is then applied against the plate cylinder 9A and against the blanket cylinder 11B. The blanket cylinder 11B thus acts as a pressure cylinder for the blanket cylinder 11A and vice versa.

L'unité 5 peut alors imprimer la bande de papier 3 qui passe entre les cylindres 11A et 11B au niveau d'un point de pincement 59 (« nip » en anglais).The unit 5 can then print the paper web 3 which passes between the rolls 11A and 11B at a pinch point 59 ("nip" in English).

Lors de l'impression, les moteurs 21A et 21B entraînent les cylindres 9A, 9B, 11A et 11B en rotation autour de leurs axes centraux respectifs. Cet entraînement peut être assuré par exemple grâce à des pignons droits engrenant les uns avec les autres.When printed, the motors 21A and 21B drive the cylinders 9A, 9B, 11A and 11B in rotation around their respective central axes. This training can be ensured for example by means of spur gears meshing with each other.

Ainsi, par exemple pour le groupe 7A, un pignon solidaire en rotation de l'arbre de sortie du moteur 21A peut engrener avec un pignon solidaire du cylindre porte-plaque 9A qui engrène lui-même avec un pignon solidaire du cylindre porte-blanchet 11A. Le cylindre porte-blanchet 11A est alors entraîné en rotation autour de son axe A11A par l'intermédiaire du cylindre porte-plaque 9A.Thus, for example for the group 7A, a pinion integral in rotation with the output shaft of the motor 21A can mesh with a pinion integral with the plate cylinder 9A which meshes with a pinion integral with the blanket cylinder 11A. . The blanket cylinder 11A is then rotated about its axis A11A through the plate cylinder 9A.

Les mêmes moteurs 21A et 21B peuvent également assurer l'entraînement en rotation des systèmes d'encrage 13A et 13B (non-représenté) et des systèmes d'humidification 17A et 17B (non-représenté).The same motors 21A and 21B can also provide rotational drive of the inking systems 13A and 13B (not shown) and the humidification systems 17A and 17B (not shown).

Lors de l'impression, et de manière classique, la ou les plaques portées par les cylindres porte-plaques 9A et 9B sont humidifiées puis encrées par les systèmes 13A et 17A. Ces plaques décalquent l'encre de leurs régions imprimantes sur les blanchets portés par les cylindres 11A et 11 B, qui décalquent l'encre sur la bande 3, qui est ainsi imprimée de ses deux côtés.During printing, and conventionally, the plate or plates carried by the plate cylinders 9A and 9B are moistened and inked by the systems 13A and 17A. These plates decode the ink from their printer regions on the blankets carried by the rolls 11A and 11B, which offset the ink on the strip 3, which is thus printed on both sides.

On observera que les dispositifs de rappel élastique 57A et 57B assurent, lors du fonctionnement de l'unité 5, le maintien en pression des cylindres porte-blanchet 11A et 11B l'un contre l'autre et absorbent également les énergies des vibrations susceptibles d'apparaître.It will be observed that the elastic return devices 57A and 57B ensure, during the operation of the unit 5, the pressurization of the blanket cylinders 11A and 11B against each other and also absorb the energies of the vibrations likely to 'appear.

Dans sa deuxième position, illustrée par la figure 3, le cylindre porte-blanchet 11A est écarté de la bande 3. Il n'est donc plus appliqué contre le cylindre porte-blanchet 11B.In its second position, illustrated by the figure 3 , the blanket cylinder 11A is spaced from the band 3. It is no longer applied against the blanket cylinder 11B.

II existe alors un espace entre le cylindre porte-blanchet 11A et le cylindre porte-blanchet 11B qui est également en deuxième position sur la figure 3. Cet espace permet à la bande de passer librement entre les cylindres porte-blanchet 11A et 11B sans les toucher. Typiquement, la hauteur G1 de cet espace est d'environ 30mm. Plus généralement, la hauteur G1 est supérieure à la déflexion de la bande 3, résultant de sa tension et de ses caractéristiques physiques, additionnée aux amplitudes de vibrations qui résultent des excitations de la rotative.There is then a gap between the blanket cylinder 11A and the blanket cylinder 11B which is also in second position on the figure 3 . This space allows the band to pass freely between the blanket cylinders 11A and 11B without touching them. Typically, the height G1 of this space is about 30mm. More generally, the height G1 is greater than the deflection of the band 3, resulting from its voltage and its physical characteristics, added to the amplitudes of vibrations that result from the excitations of the press.

Dans cette deuxième position, le cylindre porte-plaque 9A et le cylindre porte-blanchet 11A sont toujours appliqués l'un contre l'autre.In this second position, the plate cylinder 9A and the blanket cylinder 11A are always applied against each other.

Cette deuxième position, dans laquelle l'unité 5 est hors service, permet d'assurer par exemple l'enlèvement ou la mise en place des plaques sur les cylindres porte-plaque 9A et 9B, par exemple par un procédé manuel, automatique ou semi-automatique.This second position, in which the unit 5 is out of service, makes it possible, for example, to remove or set up the plates on the plate cylinders 9A and 9B, for example by a manual, automatic or semi-manual process. -automatic.

Le passage des premières positions aux deuxièmes positions des cylindres porte-blanchet 11A et 11B s'effectue sous l'action des vérins 53A et 53B, par rotation autour des axes A9A et A9B, les axes des cylindres porte-plaque 9A et 9B restant fixes. Les bielles principales 33A et 33B passent alors dans leurs positions inclinées. On notera que les rotations des bielles 33A et 33B autour des axes A9A et A9B pour passer en deuxième position s'effectuent dans le même sens, c'est-à-dire dans le sens anti-horaire sur la figure 1, pour les deux groupes d'impression 7A et 7B.The passage from the first positions to the second positions of the blanket cylinders 11A and 11B takes place under the action of the cylinders 53A and 53B, by rotation about the axes A9A and A9B, the axes of the plate cylinders 9A and 9B remaining fixed . The main rods 33A and 33B then pass into their inclined positions. It will be noted that the rotations of the connecting rods 33A and 33B around the axes A9A and A9B to move to the second position are carried out in the same direction, that is to say in the counter-clockwise direction on the figure 1 for both printing groups 7A and 7B.

Dans la troisième position illustrée par la figure 4, dite position hors-pression, le cylindre porte-blanchet 11A est espacé du cylindre porte-plaque 9A. Cet espacement a été obtenu par passage des bielles auxiliaires 35A dans leur position déployée, et donc du mécanisme 23A dans sa configuration d'écartement des axes A9A et A11A. L'espace délimité entre les cylindres porte-blanchet 11A et 11B, lorsqu'ils sont dans leurs troisièmes positions, peut alors avoir une hauteur d'environ 25mm. Cette troisième position peut être utilisée pour assurer le changement des blanchets portés par les cylindres 11A et 11B.In the third position illustrated by the figure 4 , said off-pressure position, the blanket cylinder 11A is spaced from the plate cylinder 9A. This spacing was obtained by passing the auxiliary links 35A in their deployed position, and therefore the mechanism 23A in its spacing configuration axes A9A and A11A. The space delimited between the blanket cylinders 11A and 11B, when in their third positions, can then have a height of about 25mm. This third position can be used to ensure the change of the blankets carried by the cylinders 11A and 11B.

Le passage des deuxièmes aux troisièmes positions s'effectue sous l'action des vérins 55A et 55B par rotation des bielles auxiliaires 35A et 35B dans le sens antihoraire sur la figure 3.The passage from second to third positions is effected under the action of the cylinders 55A and 55B by rotation of the auxiliary links 35A and 35B counterclockwise on the figure 3 .

Le passage des troisièmes positions vers les deuxièmes et les premières positions s'effectue de manière inverse à ce qui vient d'être décrit.The passage of the third positions to the second and the first positions is performed in the opposite way to what has just been described.

On notera que les mécanismes 23A et 23B sont indépendants, de sorte que les rotations des bielles 33A, 33B, 35A, 35B peuvent être différentes et adaptées aux besoins.It will be noted that the mechanisms 23A and 23B are independent, so that the rotations of the connecting rods 33A, 33B, 35A, 35B can be different and adapted to the needs.

Le déplacement des cylindres porte-blanchet 11A et 11B entre leurs premières et troisièmes positions s'effectue notamment par rotation autour des axes A9A et A9B des cylindres porte-plaque 9A et 9B, ce qui simplifie grandement la cinématique. En particulier, le passage de la position en pression à la position de changement de plaque s'effectue par simple rotation des bielles principales.The displacement of the blanket cylinders 11A and 11B between their first and third positions is effected in particular by rotation around the axes A9A and A9B of the plate cylinders 9A and 9B, which greatly simplifies the kinematics. In particular, the transition from the pressure position to the plate change position is effected by simple rotation of the main rods.

De plus, les axes A9A et A9B restant fixes lors de ces mouvements, il n'est pas nécessaire de modifier la position des rouleaux 15A et 19A ni celles des moteurs 21A et 21B. Les déplacements des cylindres 11A et 11B ne risquent donc pas d'entraîner des dérèglements des systèmes d'encrage 13A et 13B et d'humidification 17A et 17B et il n'est pas nécessaire de prendre des dispositions coûteuses pour empêcher de tels dérèglements.In addition, the axes A9A and A9B remain fixed during these movements, it is not necessary to change the position of the rollers 15A and 19A or those of the motors 21A and 21B. The movements of the cylinders 11A and 11B therefore do not risk causing disturbances of the inking systems 13A and 13B and humidification 17A and 17B and it is not necessary to make expensive arrangements to prevent such disturbances.

Par ailleurs, ce type de déplacement permet d'atteindre des hauteurs d'espace G1 et G2 relativement importantes, garantissant que la bande 3 ne sera pas en contact des cylindres porte-blanchet 11A et 11B en deuxième et troisième positions, sans nécessiter de dispositif de guidage supplémentaire.Moreover, this type of displacement makes it possible to reach relatively large space heights G1 and G2, ensuring that the strip 3 will not be in contact with the blanket cylinders 11A and 11B in second and third positions, without the need for a device. additional guidance.

Dans d'autres modes de réalisation, la bielle principale 33A peut porter le cylindre porte-blanchet 11A via d'autres éléments que des bielles auxiliaires 35A.In other embodiments, the main link 33A can carry the blanket cylinder 11A via other elements than auxiliary links 35A.

Ainsi, la figure 5 illustre un deuxième mode de réalisation dans lequel les mécanismes de support 23A et 23B sont moins encombrants. Les bielles auxiliaires 35A et 35B ont été remplacées par des corps 61A et 61B qui reçoivent à rotation les extrémités 49A et 49B des cylindres porte-blanchet 11A et 11B. Ces blocs 61A et 61B sont mobiles en translation le long respectivement des bielles 33A et 33B pour déplacer les cylindres porte-blanchet 11A et 11B entre leur deuxièmes et leur troisièmes positions.So, the figure 5 illustrates a second embodiment in which the support mechanisms 23A and 23B are less bulky. The auxiliary links 35A and 35B have been replaced by bodies 61A and 61B which rotate the ends 49A and 49B of the blanket cylinders 11A and 11B. These blocks 61A and 61B are movable in translation respectively along the connecting rods 33A and 33B to move the blanket cylinders 11A and 11B between their second and third positions.

La figure 6 illustre encore un autre mode de réalisation dans lequel les blocs 61A et 61B sont remplacés par des paliers excentriques 71A et 71B insérés dans les bielles principales 33A et 33B et permettant de passer de la position de changement de plaque à la position en-pression.The figure 6 illustrates yet another embodiment in which the blocks 61A and 61B are replaced by eccentric bearings 71A and 71B inserted in the main rods 33A and 33B and to change from the plate change position to the in-pressure position.

D'autres modes de réalisation des mécanismes de support 23A et 23B sont envisageables.Other embodiments of the support mechanisms 23A and 23B are conceivable.

De même, les principes décrits ci-dessus peuvent s'appliquer à d'autres types d'unité d'impression, par exemple ne comprenant pas de système d'humidification, ou à des unités d'impression simples.Likewise, the principles described above can be applied to other types of printing unit, for example not including a humidification system, or to simple printing units.

De telles unités simples ne comprennent qu'un groupe imprimant muni d'un cylindre porte-plaque et d'un cylindre porte-blanchet, ainsi qu'un cylindre de pression sur lequel le cylindre porte-blanchet s'applique dans la position en-pression.Such simple units comprise only a printing unit provided with a plate cylinder and a blanket cylinder, as well as a pressure cylinder on which the blanket cylinder is applied in the internal position. pressure.

Claims (12)

  1. Unit (5) for printing a paper web (3) comprising a frame (25) and at least one first printing assembly (7A), the first printing assembly (7A) having a first plate cylinder (9A) with a centre axis (A9A), a first blanket cylinder (11A) with a centre axis (A11A) and intended to cooperate with a pressure cylinder (11B), wherein the printing assembly also comprises a mechanism (23A) for supporting the first blanket cylinder (11A), as a result of which the first blanket cylinder (11A) is movable in relation to the frame (25) between at least one position under pressure, in which the first blanket cylinder (11A) is applied one against the first plate cylinder (9A) and against the pressure cylinder (11B), and a pressureless position, in which the first blanket cylinder (11A) is spaced from the first plate cylinder (9A) and from the pressure cylinder (11B), wherein the supporting mechanism (23A) comprises at least one main connecting rod (33A), which is movable in relation to the frame and carries the blanket cylinder (11A), characterised in that the main connecting rod is movable in relation to the frame to be rotatable around the centre axis (A9A) of the first plate cylinder (9A), and in that the centre axis (A9A) of the first plate cylinder (9A) remains fixed in relation to the frame (25) when the first blanket cylinder (11A) is displaced between its position under pressure and its pressureless position.
  2. Unit according to claim 1, wherein the first blanket cylinder (11A) can also occupy a plate changing position, in which position it is applied against the first plate cylinder (9A) and is spaced from the pressure cylinder (11B).
  3. Unit according to one of the preceding claims, wherein the supporting mechanism (23A) is deformable between a configuration where it is distanced from and a position where it approaches the axes (A9A, A11A) of the first plate (9A) and blanket cylinders (11A), and in said unit the supporting mechanism (23A) is in the configuration of approach when the first blanket cylinder (11A) is in the position under pressure, and the supporting mechanism (23A) is in the distanced configuration when the first blanket cylinder (11A) is in the pressureless position.
  4. Unit according to claim 3, wherein the supporting mechanism (23A) comprises at least one elastic restoring device (57A) for the supporting mechanism in its distanced configuration.
  5. Unit according to one of the preceding claims, wherein the supporting mechanism (23A) additionally comprises an auxiliary connecting rod (35A) articulated to the main connecting rod (33A) to be able to pivot in relation to the main connecting rod (33A) around an axis parallel to the centre axes of the first plate (9A) and blanket cylinders (11A), and in which an end (49A) of the first blanket cylinder (11A) is rotatably received in the auxiliary connecting rod (35A) to allow to blanket cylinder to rotate around its centre axis (A11A).
  6. Unit according to claims 4 and 5 taken in combination, wherein the elastic restoring device (57A) extends between the main connecting rod (33A) and the auxiliary connecting rod (35A).
  7. Unit according to one of claims 1 to 4, wherein the supporting mechanism (23A) comprises at least one assembly (61A) for rotatably receiving an end (49A) of the first blanket cylinder (11A) so that it can rotate around its centre axis (A11A), and in which the assembly (61A) is capable of translatory movement along the connecting rod (33A).
  8. Unit according to claims 4 and 7 taken in combination, wherein the elastic restoring device (57A) extends between the main connecting rod (33A) and the assembly (61A).
  9. Unit according to one of the preceding claims, comprising at least one second printing assembly (7B) comprising a second plate cylinder (9B) and a second blanket cylinder (11B), wherein the second blanket cylinder (11B) forms the pressure cylinder of the first blanket cylinder (11A) and the first blanket cylinder (11A) forms the pressure cylinder of the second blanket cylinder (11B).
  10. Unit according to claim 10, wherein the blanket cylinders (11A, 11B) of the first and second printing assemblies (7A, 7B) move from their positions under pressure to their pressureless positions by rotating around the axes of the plate cylinders (9A, 9B) in the same direction.
  11. Unit according to one of the preceding claims, comprising at least one drive motor (21A, 21B) per printing assembly.
  12. Printing press, characterised in that it comprises at least one printing unit according to any one of the preceding claims.
EP06291311A 2005-08-19 2006-08-16 Printing unit with blanket cylinder movable between a throw-on and a throw-off position and corresponding printing press Not-in-force EP1754599B1 (en)

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FR0508641A FR2889822B1 (en) 2005-08-19 2005-08-19 PRINTING UNIT WITH MOBILE WHIRLPOPPER CYLINDER BETWEEN PRESSURE POSITION AND PRESSURE POSITION AND CORRESPONDING PRINTING PRESS.

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EP1754599A2 EP1754599A2 (en) 2007-02-21
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US (2) US7975609B2 (en)
EP (1) EP1754599B1 (en)
JP (1) JP2007050703A (en)
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FR2889822B1 (en) * 2005-08-19 2007-11-09 Goss Int Montataire Sa PRINTING UNIT WITH MOBILE WHIRLPOPPER CYLINDER BETWEEN PRESSURE POSITION AND PRESSURE POSITION AND CORRESPONDING PRINTING PRESS.
FR2895308B1 (en) * 2005-12-27 2009-07-03 Goss Int Montataire Sa PRINTING UNIT WITH TUBULAR BLANCHET OFF-PRESSURE CONFIGURATION FOR PASSING A PAPER STRIP AND CORRESPONDING PRINTING PRESS.
FR2895307B1 (en) * 2005-12-27 2008-03-14 Goss Int Montataire Sa PRESSURE UNIT WITH OFF-PRESSURE CONFIGURATION FOR LIMITING THE RISK OF DAMAGE TO CYLINDERS BY WINDING OF THE PAPER STRIP, AND PRESS PRESS OF CORRESPONDING.
FR2895309B1 (en) * 2005-12-27 2009-07-03 Goss Int Montataire Sa PRINTING UNIT HAVING OFF-STOP PRESSURE CONFIGURATION AND AN OFF-PRESSURE WHITE CHANGE CONFIGURATION AND CORRESPONDING PRINTING PRESS
FR2895306B1 (en) * 2005-12-27 2008-04-04 Goss Int Montataire Sa PRINTING UNIT HAVING DIFFERENT AMPLITUDES FOR MOVING LOW-HOLDER CYLINDERS TO REACH AN OUTSTANDING PRESSURE CONFIGURATION AND CORRESPONDING PRESS PRESS.
US20110132216A1 (en) * 2009-12-09 2011-06-09 7242514 Canada Inc. Stack angle compensation arrangement for a skewing adjustment system in an offset printing press
US8919250B2 (en) * 2010-08-02 2014-12-30 Goss International Americas, Inc. Printing press and method for positioning cylinders therein
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CN113561628B (en) * 2021-07-23 2022-11-04 河南今明纸业有限公司 High-frequency vibration paper gold stamping device and paper gold stamping method

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US20110308408A1 (en) 2011-12-22
FR2889822A1 (en) 2007-02-23
EP1754599A3 (en) 2007-12-05
JP2007050703A (en) 2007-03-01
DE602006007647D1 (en) 2009-08-20
CN1931574B (en) 2011-07-06
FR2889822B1 (en) 2007-11-09
EP1754599A2 (en) 2007-02-21
US7975609B2 (en) 2011-07-12
CN1931574A (en) 2007-03-21
US20070039494A1 (en) 2007-02-22

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