EP0611240A1 - Printing machine, incorporating at least one double-displacement cylinder - Google Patents

Printing machine, incorporating at least one double-displacement cylinder Download PDF

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Publication number
EP0611240A1
EP0611240A1 EP94490003A EP94490003A EP0611240A1 EP 0611240 A1 EP0611240 A1 EP 0611240A1 EP 94490003 A EP94490003 A EP 94490003A EP 94490003 A EP94490003 A EP 94490003A EP 0611240 A1 EP0611240 A1 EP 0611240A1
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EP
European Patent Office
Prior art keywords
cylinder
displacement
printing machine
slides
slide
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Granted
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EP94490003A
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German (de)
French (fr)
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EP0611240B1 (en
Inventor
Jean Pierre Cuir
Gérard Cuir
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Individual
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Individual
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    • 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
    • B41F13/34—Cylinder lifting or adjusting devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/30—Arrangements for tripping, lifting, adjusting, or removing inking rollers; Supports, bearings, or forks therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F5/00—Rotary letterpress machines
    • B41F5/24—Rotary letterpress machines for flexographic printing

Definitions

  • the present invention relates to a printing machine equipped with a plurality of cylinders and more particularly to a printing machine of the flexographic sheet-by-sheet type in which at least one cylinder, for example the screened cylinder or the back-pressure cylinder is completely retractable. by a double displacement of great amplitude.
  • a displacement of certain cylinders, of greater amplitude, is sometimes necessary, in particular when it is a question of changing one cylinder by another.
  • gripping means capable of achieving a certain clearance in height of the cylinders, said gripping means cooperating with tilting raceways intended to ensure a linear translation of the cylinders, moving by gravity on the raceways until reaching a position where they are suitable for being taken up by hoists.
  • the device described in this document FR 2 485 990 has a certain number of drawbacks. On the one hand it is very complex in terms of production, using a very large number of various mechanical components. On the other hand it is not fully automatic insofar as manual intervention is necessary to release the cylinder whose change is desired.
  • the aim set by the applicant is to provide a printing machine equipped with a plurality of cylinders and which comprises displacement means for at least one of said cylinders, which overcomes the aforementioned drawbacks.
  • the machine of the invention which, typically, comprises for a given cylinder first means of displacement from a first position corresponding to the working position to a second position and second means of displacement of said second position to a third position plus the shaft of said cylinder, double displacement, comprising an individual drive motor and toothed wheels at its two ends, the second displacement means comprise a set of two racks in which can s 'meshing said gears, so that the displacement of said cylinder from the second to the third position is obtained by the rotation of said drive motor.
  • the individual drive motor of the double displacement cylinder remains integral with said cylinder during the two successive displacements of the latter. It is in particular an electronic servo motor, of the brushless type.
  • each end of the shaft of the double-displacement cylinder is integral with a slide and the first displacement means comprise a first set of two slides defining the path of said slides between the first and the second position and are capable of simultaneously moving the two slides in said slides.
  • the first displacement of the cylinder is a linear displacement between the first and the second position.
  • this first linear displacement is a vertical displacement, both for the screened cylinder and for the counter-pressure cylinder.
  • each slide comprises a rack and the first displacement means comprise a motor driving a pinion which is capable of meshing with said rack.
  • the two slides have a notch and the first displacement means comprise a motor driving two vertical ball screws, each screw having a length at least equal to the distance between the first and the second position and being able to pass through the notch, so that the ball screw nut carries a slider between the first and second position and in that the screw can come out of the notch and be released from the slider between the second and third position
  • the printing machine according to the invention is with automatic change of screened cylinder.
  • it comprises at least two double displacement screened cylinders, one being in the third so-called storage position while the other is in the first so-called working position; moreover it comprises third means of displacement of said cylinders from the second to a fourth position, which is in the same direction but opposite to that of displacement from the second to the third position.
  • the change of screened cylinder is effected by actuating the first , the second and third displacement means so that the screened cylinder which in the working position passes to the second then to the fourth position and in that the cylinder which is in the third so-called storage position passes to the second and then to the first position
  • the printing machine is washing automatic plate cylinder.
  • it comprises a double-displacement backpressure cylinder placed in the working position under the plate cylinder, a mobile device for washing the plate cylinder and means for moving said washing device which are suitable for bring close to the plate cylinder when the back pressure cylinder has moved from the first to the third position.
  • the mobile washing device is, when the back-pressure cylinder is in the working position, placed in a housing which is located near the second position; the means for moving said washing device then comprise the first means for moving the back-pressure cylinder.
  • the means for moving said washing device then comprise the first means for moving the back-pressure cylinder.
  • it is the same displacement means which both retract the back-pressure cylinder between the first and second positions and which position the mobile washing device from its housing to its location in the vicinity and under the plate cylinder.
  • the printing machine according to the invention is with automatic retraction of the back-pressure cylinder and of the system for transferring the material to be printed, integral with said back-pressure cylinder.
  • the machine also includes support rods on which the transfer system is supported and pivots on itself during the passage of the back-pressure cylinder from the first to the third position.
  • the printing machine which will be discussed in the examples below is a sheet-fed flexographic printer in which the plate cylinder 1, fixed, occupies a central position while the back-pressure cylinder 2 is located below of the plate cylinder 1 and the screened cylinder 3 above it.
  • This choice is not, however, limiting of the invention but simply allows it to be illustrated.
  • the screened cylinder is the cylinder which brings the desired ink dose to the plate cylinder. It has on its surface a multitude of cells.
  • the ink deposited on the screened cylinder 3 is scraped with a rubber cylinder 4 or possibly with a doctor blade in order to leave on its surface an amount of ink corresponding to the volume of its cells.
  • This ink is then transferred to the plate cylinder 1, against which the screened cylinder 3 is applied.
  • the sheet to be printed passes between the plate cylinder 1 and the back pressure cylinder 2 so that the ink deposited on the cliché be applied to said sheet
  • the quantity of ink added to the plate may be modified depending on the type of printing, for example flat or text in fine print, or the type of cardboard, for example. example kraft or coated cardboard.
  • Such a modification of the quantity of ink can only be done by changing the screened cylinder.
  • the printing machine represented in FIG. 1 shows the different elements making it possible to automatically change the screened cylinder.
  • the shaft 5, 5 'of each of the two screened cylinders 3, 3' is rotated by an electronic servo motor, of the brushless type, not shown.
  • the shaft 5, 5 ' also includes, towards each of its ends, a toothed wheel 6, 6'.
  • the ends of said shafts 5, 5 ' are secured to slides 7, 7'.
  • the automatic change of the screened cylinder 3 is carried out by a first movement from the working position to a second intermediate position, illustrated in FIG. 2.
  • This first movement, linear and vertical, is obtained by means of slides, 8, 9, which delimit the path of the slides 7 between the first and the second position.
  • a transfer piece 10 capable of moving between the two slides 8, 9, at the same time as the slides 7.
  • This transfer piece 10 is secured to the corresponding slide 7 so as to allow the vertical movement of the part 10 by driving the slide 7.
  • This connection can result from the presence of an assembly system of the T-slot type which achieves this connection when the movement is vertical but which must allow the separation of the slide 7 and the transfer piece 10 when the movement will be horizontal as will be explained below.
  • the slide 7 as well as the transfer piece 10 laterally support a rack respectively 11, 12, the two racks being in the extension of one another when the slide 7 and the transfer piece 10 are secured.
  • the two vertical slides 8, 9 are extended, towards their ends opposite to the plate cylinder, each by a horizontal slide 13 and 14 respectively.
  • a rack 15 extending horizontally is arranged. above the two horizontal slides 13, 14 and the space between these two slides corresponding to the spacing of the two vertical slides 8, 9.
  • the printing machine further comprises, opposite each slide 7, a toothed wheel 16, driven in rotation by a gear motor not shown.
  • This toothed wheel 16 is arranged so as to always be in engagement with the teeth of the rack 11, 12 either of the slide 7 or of the transfer part 12.
  • the automatic change of the screened cylinder is obtained in accordance with the various steps illustrated in FIG. 1 in FIG. 7.
  • Figure 1 there is shown the first screened cylinder 3 in the working position, applied against the plate cylinder 1, while the second screened cylinder 3 'is in the storage position, its slides 7' resting on one of the two horizontal slides 13, 14 at the end thereof.
  • this storage position which we will call third position, the toothed wheel 6 'of the second screened cylinder 3' is engaged on the teeth of the rack 15.
  • This movement is obtained by controlling the rotation of the gear motor driving in rotation the toothed wheel 16 in the direction of the arrow F.
  • the toothed wheel 16 meshes first in the rack 11 of the slide 7 then in the rack 12 of the transfer part 10, this rotation causes the vertical displacement along the arrow G of the assembly constituted by the slide 7, the first screened cylinder 3 and the transfer part 10.
  • the second position is reached when the toothed wheel 6 carried by the shaft 5 of the first screened cylinder 3 is applied in the teeth of the horizontal rack 15.
  • the base of the slide 7 is tangent to the upper face of the horizontal slides 13, 14.
  • the transfer part 10 remains in the position which was hers in FIG. 2, that is to say when the first screened cylinder was in the second position. Indeed the slide 7 is detached from the transfer part 10, by sliding one relative to the other of the assembly system of the T-slot type.
  • Figure 4 shows the two screened cylinders 3, 3 'in the storage position.
  • Figures 5 to 7 show the steps for moving the second screened cylinder 3 'from its storage position to the working position. These steps are very similar to those just described.
  • the displacement of the second screened cylinder 3 'from the third to the second position is effected by rotation of the electronically controlled motor driving the toothed wheel 6' mounted on the shaft 5 'of said second screened cylinder 3' in the direction of the arrow F.
  • the slide 7 ′ of the second screened cylinder 3 ′ comes to join with the transfer part 10 which had remained in the same position.
  • the gear motor drives in the direction of the arrow F' the toothed wheel 16, which first meshes in the rack 12 of the transfer part 10 then in the rack 11 'of the slide 7' so as to drive the second screened cylinder 3 'from the second to the first position.
  • the drive motors of the screened cylinders 3, 3 ′ and of the toothed wheel 16 are connected to an electronic control system, making it possible to synchronize the movements as described above. More particularly, a particular synchronization must be implemented so that when the cylinder arrives in the second position, the corresponding toothed wheel 6 comes to perfectly engage in the teeth of the rack 15.
  • the printing machine is with automatic washing of the plate cylinder 1 and with retraction of the assembly 17 constituted by the back pressure cylinder 2 and the transfer system. leaves.
  • Washing of the plate cylinder 1 is generally carried out manually when the machine is stopped, or else by dismantling the plate cylinder 1 and placing it in a special washing installation.
  • the back-pressure cylinder 2 is integral with the system for transferring the material to be printed.
  • a transfer assembly 17 which consists of the back-pressure cylinder 2, of the electronically-controlled motor 18, which drives the shaft 19 of the back-pressure cylinder 2, a set of belts 20, possibly notched, mounted in a loop around two drive rollers 21, 22, the roller 22, located near the back pressure cylinder 2 also being driven by the motor 18.
  • the set of belts 20 could be replaced by a succession of drive rollers.
  • the set of belts 20 conveys the printed material, sheet by sheet, from the previous station 23.
  • the set of belts 20 can be surmounted by an infrared device 24 intended for drying the ink in the case where the preceding station 23 is itself a printing station.
  • the shaft 19 of the back pressure cylinder 2 supports at each of its ends on the one hand a toothed wheel 25 and on the other hand a slide 26, which in this case is a rectangular metal plate .
  • the retraction of the back pressure cylinder 2 is achieved by a first vertical displacement, by means of vertical slides 27, 28 delimiting the path of the slide 26 between the first working position of the back pressure cylinder 2 and the second intermediate position.
  • a second movement, between said second position and a third storage position is achieved by two horizontal slides 29, 30 defining the path of the slide 26 between these two positions.
  • the slide 26 is provided with a notch into which the nut of the ball screw penetrates during this movement so as to ensure its blocking.
  • the arrangement of the notch is such that when the slide is driven from the second to the third position, the nut of the ball screw comes out of the notch, separating the transfer system 17 from the ball screw system.
  • the machine is also equipped with horizontal racks 31, located in the area between the two horizontal slides 39 and 30.
  • the mobile washing device 32 consists of a tank 33 for recovering the washing liquid and of an assembly comprising rotary brushes with axial displacement and water jets. It is of course possible to equip this mobile washing device 32 with all mechanical, pneumatic, ultrasonic, etc. means allowing washing of the plate cylinder 1 to be carried out in a short time.
  • the mobile washing device 32 is, when the back-pressure cylinder 2 is in the first working position, located in a housing 33 which is a hollow part of the base 34 of the machine.
  • the vertical movement of the washing device 32 from its housing 33 to the first position, that is to say in the immediate vicinity of the plate cylinder 1 is preferably obtained by the same means as those used to ensure the vertical displacement of the back pressure cylinder 2.
  • the washing device 32 is equipped, at each of its ends with a slide, not shown, capable of moving, like the slide 26 of the back pressure cylinder 2 between the vertical slides 27, 28, to carry out the automatic washing of the plate cylinder 1.
  • the retraction of the set of belts 20 is obtained also thanks to two support rods 35, 36 whose position and role will be explained during the description which follows of the various stages allowing the complete retraction of the transfer system 17 and automatic installation of the washing device 32.
  • FIG 8 there is shown the transfer system 17 in its working position, namely the back pressure cylinder 2 being applied to the plate cylinder 1 and the set of belts 20 being upstream and in horizontal alignment of the line of tangency between the plate cylinder 1 and the back pressure cylinder 2.
  • Figure 9 there is shown the first movement of the back-pressure cylinder 2 from the first working position to the second position, obtained by rotation of the screw of the ball screw system and the correlative movement of the slides 26 between the slides 27, 28.
  • the belt 20 is supported by a second support rod 36 fixed to the frame of the printing machine.
  • the set of belts 20 makes a substantially 45 ° angle apart from the horizontal.
  • the complete retraction of the transfer system 17 is achieved by the second displacement of the back pressure cylinder 2 between the second intermediate position and the third standby position.
  • This second movement is obtained by the rotation of the shaft 19, driven by the electronic servo motor 18.
  • the washing device is moved vertically between its base position where it is in its housing 33, to its high position or it is near the plate cylinder. 1.
  • Such displacement can be obtained by independent means or, preferably, by the same means as those used to ensure the first vertical displacement of the back-pressure cylinder 2.
  • the washing device 32 comprises a fork which is retractable between a retracted position and an extended position in which the ball screw penetrates between the arms of the fork at above the nut of the ball screw, the passage between the retracted position and the extended position of the fork being effected by the action of a limit switch when the counter-pressure cylinder arrives 2 in the third waiting position.
  • the washing device 32 is mounted at each of its ends on slides 38 and the machine also includes a set of moving parts 39.
  • the moving part 39 is located below the level of the horizontal lower slide 30. It is further characterized by three shoulders 40, 41, 42, the first 40 being located at its front end while the other two shoulders 41, 42 are situated at its rear end and delimit between them a space capable of forming a housing for the slide 38 of the washing device 32.
  • Figure 12 there is shown the position taken by the movable part 39 while the transfer system 17 is in the working position.
  • the moving part 39 remains in this same position.
  • the slide 26 supporting the pressure cylinder 2 comes to bear on the first shoulder 40 and pushes it back with it into the third waiting position.
  • the amplitude of the displacement of this part 39, and therefore the position of the first shoulder 40 relative to the third standby position, is determined so that, when said shoulder 40 is in this third position, the slide 38 of the washing device 32 is located directly above the vertical slides 27, 28.
  • Each slide 26 of the back-pressure cylinder 2 has a notch 43, substantially horizontal, open on the left side in FIG. 12.
  • Each slide 38 of the washing device 32 has a notch 44, substantially horizontal, open on the right side.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)
  • Printers Characterized By Their Purpose (AREA)

Abstract

The printing machine (press) according to the invention includes, for a given cylinder, first means for displacement from a first position, corresponding to the working position, into a second position, and second means for displacement from the said second position into a third position; the shaft (5) of this cylinder (3) includes an individual drive motor and gearwheels (6) at its two ends; the second displacement means comprise a set of two racks (15) in which the gearwheels (6) can mesh, so that the displacement of the said cylinder (3) from the second to the third position is obtained by virtue of the rotation of the motor for driving the shaft (5) of the said cylinder. This may be a machine with automatic changeover of screen rollers with at least two screen rollers (3, 3') with double displacement. It may be a machine with automatic washing of the plate cylinder with a counterpressure cylinder (2) with double displacement. <IMAGE>

Description

La présente invention concerne une machine à imprimer équipée d'une pluralité de cylindres et plus particulièrement une machine à imprimer du type flexographique feuille à feuille dans laquelle au moins un cylindre, par exemple le cylindre tramé ou le cylindre de contre-pression est escamotable totalement par un double déplacement de grande amplitude.The present invention relates to a printing machine equipped with a plurality of cylinders and more particularly to a printing machine of the flexographic sheet-by-sheet type in which at least one cylinder, for example the screened cylinder or the back-pressure cylinder is completely retractable. by a double displacement of great amplitude.

Dans toutes les machines à imprimer, la plupart des cylindres sont munis d'organes de déplacement permettant de réaliser l'écartement des cylindres les uns par rapport aux autres, notamment en cas d'absence de feuilles à imprimer ou en cas de réglage de la machine. Un tel écartement correspond à un déplacement de faible amplitude.In all printing machines, most of the cylinders are provided with displacement members allowing the spacing of the cylinders with respect to each other, in particular in the absence of sheets to be printed or in the case of adjustment of the machine. Such a spacing corresponds to a displacement of small amplitude.

Un déplacement de certains cylindres, de plus grande amplitude, est parfois nécessaire, notamment lorsqu'il s'agit de changer un cylindre par un autre.A displacement of certain cylinders, of greater amplitude, is sometimes necessary, in particular when it is a question of changing one cylinder by another.

On a déjà proposé de multiples dispositifs visant à obtenir un changement rapide et facile de certains cylindres. Il peut s'agir d'un dispositif extérieur à la machine à imprimer, par exemple sous forme d'un robot, tel que celui décrit dans le document EP 0 400 517. Il peut s'agir également de dispositifs intégrés à la machine à imprimer. Un tel dispositif visant au changement automatique de cylindres d'une imprimeuse flexographique est décrit dans le document FR 2 485 990. Ce dispositif vise plus particulièrement le changement automatique des cylindres porte-clichés et des cylindres tramés sur une imprimeuse flexographique dont le cylindre de contre-pression est commun à plusieurs postes d'encrage. Il comporte des moyens de préhension aptes à réaliser un certain dégagement en hauteur des cylindres, lesdits moyens de préhension coopérant avec des chemins de roulement basculants destinés à assurer une translation linéaire des cylindres, se déplaçant par gravité sur les chemins de roulement jusqu'à atteindre une position où ils sont aptes à être pris par des palans.Multiple devices have already been proposed aiming to obtain a quick and easy change of certain cylinders. It can be a device external to the printing machine, for example in the form of a robot, such as that described in document EP 0 400 517. It can also be devices integrated into the printing machine. to print. Such a device aimed at the automatic change of cylinders of a flexographic printer is described in document FR 2 485 990. This device aims more particularly at the automatic change of plate cylinders and screened cylinders on a flexographic printer whose counter cylinder -pressure is common to several inking stations. It comprises gripping means capable of achieving a certain clearance in height of the cylinders, said gripping means cooperating with tilting raceways intended to ensure a linear translation of the cylinders, moving by gravity on the raceways until reaching a position where they are suitable for being taken up by hoists.

Le dispositif décrit dans ce document FR 2 485 990 présente, selon le demandeur, un certain nombre d'inconvénients. D'une part il est très complexe sur le plan réalisation, mettant en oeuvre un très grand nombre d'organes mécaniques divers. D'autre part il n'est pas totalement automatique dans la mesure où une intervention manuelle est nécessaire pour libérer le cylindre dont le changement est souhaité.According to the applicant, the device described in this document FR 2 485 990 has a certain number of drawbacks. On the one hand it is very complex in terms of production, using a very large number of various mechanical components. On the other hand it is not fully automatic insofar as manual intervention is necessary to release the cylinder whose change is desired.

Le but que s'est fixé le demandeur est de proposer une machine à imprimer équipée d'une pluralité de cylindres et qui comporte des moyens de déplacement pour au moins l'un desdits cylindres, qui pallie les inconvénients précités.The aim set by the applicant is to provide a printing machine equipped with a plurality of cylinders and which comprises displacement means for at least one of said cylinders, which overcomes the aforementioned drawbacks.

Ce but est parfaitement atteint par la machine de l'invention qui, de manière caractéristique, comporte pour un cylindre donné des premiers moyens de déplacement d'une première position correspondant à la position de travail à une deuxième position et des seconds moyens de déplacement de ladite deuxième position à une troisième position de plus l'arbre dudit cylindre, à double déplacement , comportant un moteur individuel d'entraînement et des roues dentées à ses deux extrémités, les seconds moyens de déplacement comprennent un jeu de deux crémaillères dans lesquelles peuvent s'engrener lesdites roues dentées, en sorte que le déplacement dudit cylindre de la deuxième à la troisième position est obtenu grâce à la rotation dudit moteur d'entraînement.This object is perfectly achieved by the machine of the invention which, typically, comprises for a given cylinder first means of displacement from a first position corresponding to the working position to a second position and second means of displacement of said second position to a third position plus the shaft of said cylinder, double displacement, comprising an individual drive motor and toothed wheels at its two ends, the second displacement means comprise a set of two racks in which can s 'meshing said gears, so that the displacement of said cylinder from the second to the third position is obtained by the rotation of said drive motor.

On comprend que , selon l'invention, le moteur individuel d'entraînement du cylindre à double déplacement reste solidaire dudit cylindre lors des deux déplacements successifs de celui-ci. Il s'agit notamment d'un moteur à asservissement électronique, du type brushless.It is understood that, according to the invention, the individual drive motor of the double displacement cylinder remains integral with said cylinder during the two successive displacements of the latter. It is in particular an electronic servo motor, of the brushless type.

Bien sûr on avait déjà proposé d'équiper des cylindres d'une machine à imprimer de moteurs individuels d'entraînement, notamment dans le document FR 2 553 032. Cependant un tel moteur n'avait jamais été utilisé pour réaliser, comme c'est le cas de la présente invention, un déplacement du cylindre lors de l'escamotage de celui-ci par rapport à sa position de travail.Of course, it had already been proposed to equip the cylinders of a printing machine with individual drive motors, in particular in document FR 2 553 032. However, such a motor had never been used to produce, as is in the case of the present invention, a displacement of the cylinder during the retraction thereof relative to its working position.

De préférence chaque extrémité de l'arbre du cylindre à double déplacement est solidaire d'un coulisseau et les premiers moyens de déplacement comportent un premier jeu de deux glissières délimitant le parcours desdit coulisseaux entre la première et la deuxième position et sont aptes a déplacer simultanement les deux coulisseaux dans lesdites glissières.Preferably each end of the shaft of the double-displacement cylinder is integral with a slide and the first displacement means comprise a first set of two slides defining the path of said slides between the first and the second position and are capable of simultaneously moving the two slides in said slides.

Selon ce mode particulier de réalisation, le premier déplacement du cylindre est un déplacement linéaire entre la première et la seconde position. S'agissant d'une machine à imprimer flexographique feuille à feuille, ce premier déplacement linéaire est un déplacement vertical, tant pour le cylindre tramé que pour le cylindre contre-pression.According to this particular embodiment, the first displacement of the cylinder is a linear displacement between the first and the second position. In the case of a sheet-by-sheet flexographic printing machine, this first linear displacement is a vertical displacement, both for the screened cylinder and for the counter-pressure cylinder.

Selon une première variante chaque coulisseau comporte une crémaillère et les premiers moyens de déplacement comprennent un moteur entraînant un pignon qui est apte à s'engrener sur ladite crémaillère.According to a first variant, each slide comprises a rack and the first displacement means comprise a motor driving a pinion which is capable of meshing with said rack.

Selon une seconde variante les deux coulisseaux comportent une encoche et les premiers moyens de déplacement comprennent un moteur entraînant deux vis verticales a billes, chaque vis ayant une longueur au moins égale à la distance entre la première et la deuxième position et étant apte à passer dans l'encoche, en sorte que l'écrou de la vis à billes porte un coulisseau entre la première et la deuxième position et en ce que la vis puisse sortir de l'encoche et être dégagée du coulisseau entre la deuxième et la troisième positionAccording to a second variant, the two slides have a notch and the first displacement means comprise a motor driving two vertical ball screws, each screw having a length at least equal to the distance between the first and the second position and being able to pass through the notch, so that the ball screw nut carries a slider between the first and second position and in that the screw can come out of the notch and be released from the slider between the second and third position

Avantageusement la machine à imprimer selon l'invention est à changement automatique de cylindre tramé. Dans ce cas elle comporte au moins deux cylindres tramés à double déplacement, l'un étant dans la troisième position dite de stockage tandis que l'autre est dans la première position dite de travail ; de plus elle comporte des troisièmes moyens de déplacement desdits cylindres de la deuxième à une quatrième position, qui est dans la même direction mais opposée à celle du déplacement de la seconde à la troisième position Le changement de cylindre tramé s'effectue en actionnant les premier , les deuxièmes et troisièmes moyens de deplacement en sorte que le cylindre tramé qui dans la position de travail passe à la deuxième puis à la quatrième position et en ce que le cylindre qui est dans la troisième position dite de stockage passe à la deuxième puis à la première positionAdvantageously, the printing machine according to the invention is with automatic change of screened cylinder. In this case, it comprises at least two double displacement screened cylinders, one being in the third so-called storage position while the other is in the first so-called working position; moreover it comprises third means of displacement of said cylinders from the second to a fourth position, which is in the same direction but opposite to that of displacement from the second to the third position. The change of screened cylinder is effected by actuating the first , the second and third displacement means so that the screened cylinder which in the working position passes to the second then to the fourth position and in that the cylinder which is in the third so-called storage position passes to the second and then to the first position

Avantageusement la machine à imprimer est à lavage automatique du cylindre porte-cliché. Dans ce cas elle comporte un cylindre contre-pression à double déplacement placé en position de travail sous le cylindre porte-cliché, un dispositif mobile de lavage du cylindre porte-cliché et des moyens de déplacement dudit dispositif de lavage qui sont aptes à l'amener à proximité du cylindre porte-cliché lorsque le cylindre contre-pression est passé de la première à la troisième position.Advantageously the printing machine is washing automatic plate cylinder. In this case it comprises a double-displacement backpressure cylinder placed in the working position under the plate cylinder, a mobile device for washing the plate cylinder and means for moving said washing device which are suitable for bring close to the plate cylinder when the back pressure cylinder has moved from the first to the third position.

De préférence le dispositif mobile de lavage est, lorsque le cylindre contre-pression est en position de travail, placé dans un logement qui est situé à proximité de la deuxième position; les moyens de déplacement dudit dispositif de lavage comprennent alors les premiers moyens de déplacement du cylindre contre-pression. Dans ce cas ce sont les mêmes moyens de déplacement qui réalisent à la fois l'escamotage du cylindre contre-pression entre la première et deuxième position et qui réalisent le positionnement du dispositif mobile de lavage depuis son logement jusqu'à son emplacement à la proximité et sous le cylindre porte-cliché.Preferably, the mobile washing device is, when the back-pressure cylinder is in the working position, placed in a housing which is located near the second position; the means for moving said washing device then comprise the first means for moving the back-pressure cylinder. In this case, it is the same displacement means which both retract the back-pressure cylinder between the first and second positions and which position the mobile washing device from its housing to its location in the vicinity and under the plate cylinder.

Avantageusement la machine à imprimer selon l'invention est à escamotage automatique du cylindre contre-pression et du système de transfert du matériau à imprimer, solidaire dudit cylindre de contre-pression. Dans ce cas la machine comporte également des tiges d'appui sur lesquelles le système de transfert prend appui et pivote sur lui-même lors du passage du cylindre de contre-pression de la première à la troisième position.Advantageously, the printing machine according to the invention is with automatic retraction of the back-pressure cylinder and of the system for transferring the material to be printed, integral with said back-pressure cylinder. In this case the machine also includes support rods on which the transfer system is supported and pivots on itself during the passage of the back-pressure cylinder from the first to the third position.

La présente invention sera mieux comprise à la lecture de la description qui va être faite de deux exemples de réalisation d'une machine à imprimer flexographique feuille à feuille à cylindre à double déplacement : le premier exemple concerne le changement automatique de cylindre tramé, et le deuxième exemple concerne simultanément l'escamotage de l'ensemble constitué par le cylindre contre-pression et le système de transfert de feuilles, alimentant la machine, ainsi que le lavage automatique du cylindre porte-cliché. Ces deux exemples sont illustrés par le dessin annexe dans lequel :

  • la figure 1 est une vue de côté de la machine à imprimer à deux cylindres tramés à changement automatique,
  • les figures 2 à 7 illustrent les différentes étapes réalisant le changement automatique desdits cylindres tramés, conformément à la figure 1,
  • la figure 8 est une vue de côté de la machine à lavage automatique du porte-cliché et à escamotage de l'ensemble cylindre de contre-pression et système de transfert, le dispositif mobile étant en position d'attente,
  • les figures 9 à 12 montrent les différentes étapes de mise en place du dispositif de lavage et d'escamotage de l'ensemble cylindre contre-pression / système de transfert.
The present invention will be better understood on reading the description which will be given of two exemplary embodiments of a flexographic sheet-to-sheet printing machine with a double displacement cylinder: the first example relates to the automatic change of screened cylinder, and the second example concerns simultaneously the retraction of the assembly constituted by the back-pressure cylinder and the sheet transfer system, feeding the machine, as well as the automatic washing of the plate cylinder. These two examples are illustrated by the accompanying drawing in which:
  • FIG. 1 is a side view of the printing machine with two screened cylinders with automatic change,
  • FIGS. 2 to 7 illustrate the different steps carrying out the automatic change of said screened cylinders, in accordance with FIG. 1,
  • FIG. 8 is a side view of the automatic washing machine for the plate holder and with retraction of the counter-pressure cylinder and transfer system assembly, the mobile device being in the standby position,
  • Figures 9 to 12 show the different stages of setting up the washing and retracting device of the cylinder against pressure / transfer system.

La machine à imprimer dont il va être question dans les exemples ci-après est une imprimeuse flexographique feuille à feuille dans laquelle le cylindre porte-cliché 1, fixe, occupe une position centrale tandis que le cylindre contre-pression 2 est situé en-dessous du cylindre porte-cliché 1 et le cylindre tramé 3 au-dessus de celui-ci. Ce choix n'est cependant pas limitatif de l'invention mais permet simplement d'illustrer celle-ci.The printing machine which will be discussed in the examples below is a sheet-fed flexographic printer in which the plate cylinder 1, fixed, occupies a central position while the back-pressure cylinder 2 is located below of the plate cylinder 1 and the screened cylinder 3 above it. This choice is not, however, limiting of the invention but simply allows it to be illustrated.

Le cylindre tramé est le cylindre qui apporte au cylindre porte-cliché la dose d'encre souhaitée. Il comporte sur sa surface une multitude d'alvéoles. L'encre déposée sur le cylindre tramé 3 est raclée grâce à un cylindre caoutchouc 4 ou éventuellement par une racle afin de laisser sur sa surface une quantité d'encre correspondant au volume de ses alvéoles. Cette encre est ensuite reportée sur le cylindre porte-cliche 1, contre lequel est appliqué le cylindre tramé 3. La feuille à imprimer passe entre le cylindre porte-cliché 1 et le cylindre contre-pression 2 en sorte que l'encre déposée sur le cliché soit appliquée sur ladite feuilleThe screened cylinder is the cylinder which brings the desired ink dose to the plate cylinder. It has on its surface a multitude of cells. The ink deposited on the screened cylinder 3 is scraped with a rubber cylinder 4 or possibly with a doctor blade in order to leave on its surface an amount of ink corresponding to the volume of its cells. This ink is then transferred to the plate cylinder 1, against which the screened cylinder 3 is applied. The sheet to be printed passes between the plate cylinder 1 and the back pressure cylinder 2 so that the ink deposited on the cliché be applied to said sheet

Afin d'obtenir des impressions de bonne qualité, il peut être nécessaire de modifier la quantité d'encre apportée au cliché en fonction du type d'impression, par exemple à plat ou texte en caractère fin, ou encore du type de carton, par exemple kraft ou carton couché. Une telle modification de la quantité d'encre ne peut se faire qu'en changeant de cylindre tramé. La machine à imprimer représentée à la figure 1 montre les différents éléments permettant de réaliser de manière automatique le changement du cylindre tramé.In order to obtain good quality prints, it may be necessary to modify the quantity of ink added to the plate depending on the type of printing, for example flat or text in fine print, or the type of cardboard, for example. example kraft or coated cardboard. Such a modification of the quantity of ink can only be done by changing the screened cylinder. The printing machine represented in FIG. 1 shows the different elements making it possible to automatically change the screened cylinder.

Par simplification on a représenté et on ne va décrire que le changement entre deux cylindres tramés 3 et 3'. Sur la figure 1, le premier cylindre tramé 3 est en position de travail tandis que le second cylindre tramé 3' est en position dite de stockage.For simplification, there has been shown and we will only describe the change between two screened cylinders 3 and 3 '. In FIG. 1, the first screened cylinder 3 is in the working position while the second screened cylinder 3 'is in the so-called storage position.

L'arbre 5, 5' de chacun des deux cylindres tramés 3, 3' est entraîné en rotation par un moteur à asservissement électronique, du type brushless, non représenté. De plus l'arbre 5, 5' comporte également, vers chacune de ses extrémités, une roue dentée 6, 6'. Enfin les extrémités desdits arbres 5, 5' sont solidaires de coulisseaux 7, 7'.The shaft 5, 5 'of each of the two screened cylinders 3, 3' is rotated by an electronic servo motor, of the brushless type, not shown. In addition, the shaft 5, 5 'also includes, towards each of its ends, a toothed wheel 6, 6'. Finally, the ends of said shafts 5, 5 'are secured to slides 7, 7'.

Le changement automatique du cylindre tramé 3 s'effectue par un premier déplacement depuis la position de travail jusqu'à une deuxième position intermédiaire, illustré à la figure 2. Ce premier déplacement, linéaire et vertical, est obtenu grâce à des glissières, 8, 9 , qui délimitent le parcours des coulisseaux 7 entre la première et la deuxième position.The automatic change of the screened cylinder 3 is carried out by a first movement from the working position to a second intermediate position, illustrated in FIG. 2. This first movement, linear and vertical, is obtained by means of slides, 8, 9, which delimit the path of the slides 7 between the first and the second position.

Il est également prévu, en-dessous de chaque coulisseau 7, en position de travail, une pièce de transfert 10, apte à se déplacer entre les deux glissières 8, 9, en même temps que les coulisseaux 7. Cette pièce de transfert 10 est solidarisée au coulisseau correspondant 7 de manière à permettre le déplacement vertical de la pièce 10 par entraînement du coulisseau 7. Cette solidarisation peut résulter par la présence d'un système d'assemblage du type rainure en Té qui réalise cette solidarisation lorsque le déplacement est vertical mais qui doit permettre la désolidarisation du coulisseau 7 et de la pièce de transfert 10 lorsque le déplacement sera horizontal comme cela sera expliqué ci-après.There is also provided, below each slide 7, in the working position, a transfer piece 10, capable of moving between the two slides 8, 9, at the same time as the slides 7. This transfer piece 10 is secured to the corresponding slide 7 so as to allow the vertical movement of the part 10 by driving the slide 7. This connection can result from the presence of an assembly system of the T-slot type which achieves this connection when the movement is vertical but which must allow the separation of the slide 7 and the transfer piece 10 when the movement will be horizontal as will be explained below.

Le coulisseau 7 ainsi que la pièce de transfert 10 supportent latéralement une crémaillère respectivement 11, 12, les deux crémaillères étant dans le prolongement l'une de l'autre lorsque le coulisseau 7 et la pièce transfert 10 sont solidarisés.The slide 7 as well as the transfer piece 10 laterally support a rack respectively 11, 12, the two racks being in the extension of one another when the slide 7 and the transfer piece 10 are secured.

Les deux glissières verticales 8, 9 sont prolongées, vers leurs extrémités opposées au cylindre porte-cliché, chacune par une glissière horizontale respectivement 13 et 14. De plus on a disposé une crémaillère 15 s'étendant horizontalement au-dessus des deux glissières horizontales 13, 14 et de l'espace entre ces deux glissières correspondant à l'écartement des deux glissières verticales 8, 9.The two vertical slides 8, 9 are extended, towards their ends opposite to the plate cylinder, each by a horizontal slide 13 and 14 respectively. In addition, a rack 15 extending horizontally is arranged. above the two horizontal slides 13, 14 and the space between these two slides corresponding to the spacing of the two vertical slides 8, 9.

La machine à imprimer comporte en outre, en regard de chaque coulisseau 7, une roue dentée 16, entraînée en rotation par un moto-réducteur non représenté. Cette roue dentée 16 est disposée de telle sorte d'être toujours en prise sur les dents de la crémaillère 11, 12 soit du coulisseau 7 soit de la pièce transfert 12.The printing machine further comprises, opposite each slide 7, a toothed wheel 16, driven in rotation by a gear motor not shown. This toothed wheel 16 is arranged so as to always be in engagement with the teeth of the rack 11, 12 either of the slide 7 or of the transfer part 12.

Le changement automatique du cylindre tramé est obtenu conformément aux différentes étapes illustrées de la figure 1 à la figure 7.The automatic change of the screened cylinder is obtained in accordance with the various steps illustrated in FIG. 1 in FIG. 7.

Sur la figure 1 on a représenté le premier cylindre tramé 3 en position de travail, appliqué contre le cylindre porte-cliché 1, tandis que le second cylindre tramé 3' est en position de stockage, ses coulisseaux 7' reposant sur l'une des deux glissières horizontales 13, 14 en bout de celle-ci. Dans cette position de stockage, que nous appelerons troisième position, la roue dentée 6' du second cylindre tramé 3' est en prise sur les dents de la crémaillère 15.In Figure 1 there is shown the first screened cylinder 3 in the working position, applied against the plate cylinder 1, while the second screened cylinder 3 'is in the storage position, its slides 7' resting on one of the two horizontal slides 13, 14 at the end thereof. In this storage position, which we will call third position, the toothed wheel 6 'of the second screened cylinder 3' is engaged on the teeth of the rack 15.

Sur la figure 2, on a représenté le déplacement du premier cylindre tramé 3 de la position de travail à une position intermédiaire, que nous appelerons deuxième position.In Figure 2, there is shown the displacement of the first screened cylinder 3 from the working position to an intermediate position, which we will call second position.

Ce déplacement est obtenu en commandant la rotation du moto-réducteur entraînant en rotation la roue dentée 16 dans le sens de la flèche F. La roue dentée 16 s'engrenant d'abord dans la crémaillère 11 du coulisseau 7 puis dans la crémaillère 12 de la pièce transfert 10, cette rotation entraîne le déplacement vertical selon la flèche G de l'ensemble constitué par le coulisseau 7, le premier cylindre tramé 3 et la pièce transfert 10.This movement is obtained by controlling the rotation of the gear motor driving in rotation the toothed wheel 16 in the direction of the arrow F. The toothed wheel 16 meshes first in the rack 11 of the slide 7 then in the rack 12 of the transfer part 10, this rotation causes the vertical displacement along the arrow G of the assembly constituted by the slide 7, the first screened cylinder 3 and the transfer part 10.

La seconde position est atteinte lorsque la roue dentée 6 portée par l'arbre 5 du premier cylindre tramé 3 vient s'appliquer dans les dents de la crémaillère horizontale 15. Dans cette seconde position la base du coulisseau 7 est tangente à la face supérieure des glissières horizontales 13, 14.The second position is reached when the toothed wheel 6 carried by the shaft 5 of the first screened cylinder 3 is applied in the teeth of the horizontal rack 15. In this second position the base of the slide 7 is tangent to the upper face of the horizontal slides 13, 14.

Sur la figure 3 on a représenté le second déplacement du premier cylindre tramé 3 de la deuxième à la quatrième position, cette dernière correspondant à la position de stockage de ce premier cylindre tramé. Ce déplacement est obtenu en commandant le moteur à asservissement électronique d'entraînement de l'arbre 5 du premier cylindre tramé 3, dans le sens de la flèche F. La roue dentée 6 s'engrenant sur la crémaillère horizontale 15, cette rotation entraîne l'ensemble constitué par le coulisseau 7 et le premier cylindre tramé 3 dans le sens de la flèche H. Lors de ce déplacement la base du coulisseau 7 prend appui et glisse sur la surface de la glissière horizontale 14.In FIG. 3, the second displacement of the first screened cylinder 3 from second to fourth position, the latter corresponding to the storage position of this first screened cylinder. This displacement is obtained by controlling the motor with electronic servo drive of the shaft 5 of the first screened cylinder 3, in the direction of the arrow F. The toothed wheel 6 meshing on the horizontal rack 15, this rotation causes l 'assembly constituted by the slide 7 and the first screened cylinder 3 in the direction of the arrow H. During this movement the base of the slide 7 is supported and slides on the surface of the horizontal slide 14.

Lors de ce déplacement, la pièce transfert 10 reste dans la position qui était la sienne à la figure 2, c'est-à-dire lorsque le premier cylindre tramé était dans la deuxième position. En effet le coulisseau 7 se désolidarise de la pièce transfert 10, par glissement l'un par rapport à l'autre du système d'assemblage du type rainure en Té.During this movement, the transfer part 10 remains in the position which was hers in FIG. 2, that is to say when the first screened cylinder was in the second position. Indeed the slide 7 is detached from the transfer part 10, by sliding one relative to the other of the assembly system of the T-slot type.

La figure 4 montre les deux cylindres tramés 3, 3' en position de stockage.Figure 4 shows the two screened cylinders 3, 3 'in the storage position.

Les figures 5 à 7 montrent les étapes réalisant le déplacement du second cylindre tramé 3' de sa position de stockage à la position de travail. Ces étapes sont tout-à-fait similaires à celles qui viennent d'être décrites.Figures 5 to 7 show the steps for moving the second screened cylinder 3 'from its storage position to the working position. These steps are very similar to those just described.

Le déplacement du second cylindre tramé 3' de la troisième à la deuxième position s'effectue par rotation du moteur à asservissement électronique entraînant la roue dentée 6' montée sur l'arbre 5' dudit second cylindre tramé 3' dans le sens de la flèche F. Lors de ce déplacement le coulisseau 7' du second cylindre tramé 3' vient se solidariser avec la pièce transfert 10 qui était restée dans la même position.The displacement of the second screened cylinder 3 'from the third to the second position is effected by rotation of the electronically controlled motor driving the toothed wheel 6' mounted on the shaft 5 'of said second screened cylinder 3' in the direction of the arrow F. During this movement, the slide 7 ′ of the second screened cylinder 3 ′ comes to join with the transfer part 10 which had remained in the same position.

Lorsque ce second cylindre tramé 3' est dans la deuxième position, telle qu'illustré à la figure 6, le moto-réducteur entraîne dans le sens de la flèche F' la roue dentée 16, qui s'engrène d'abord dans la crémaillère 12 de la pièce transfert 10 puis dans la crémaillère 11'du coulisseau 7' en sorte d'entraîner le second cylindre tramé 3' de la deuxième à la première position.When this second screened cylinder 3 'is in the second position, as illustrated in FIG. 6, the gear motor drives in the direction of the arrow F' the toothed wheel 16, which first meshes in the rack 12 of the transfer part 10 then in the rack 11 'of the slide 7' so as to drive the second screened cylinder 3 'from the second to the first position.

Comme on peut le voir à la figure 7, le second cylindre tramé 3' qui était initialement dans la troisième position de stockage est passé en position de travail tandis que le permier cylindre tramé 3 qui était en position de travail a été placé dans la quatrième position de stockage.As can be seen in Figure 7, the second cylinder screened 3 'which was initially in the third storage position is moved to the working position while the first screened cylinder 3 which was in the working position has been placed in the fourth storage position.

Le mode de réalisation qui vient d'être décrit l'a eté a titre d'exemple non exhaustif. Il s'agit d'un mode particulièrement simplifié puisqu'il ne comporte que deux cylindres tramés 3,3'. Il serait possible d'envisager une pluralité de cylindres tramés en position de stockage. Dans ce cas il serait nécessaire de prolonger les glissières horizontales 13 et 14 afin de permettre la juxtaposition sur la même glissière horizontale 13 ou 14 de plusieurs cylindres.The embodiment which has just been described has been given by way of non-exhaustive example. This is a particularly simplified mode since it only has two screened cylinders 3.3 ′. It would be possible to envisage a plurality of screened cylinders in the storage position. In this case it would be necessary to extend the horizontal slides 13 and 14 in order to allow the juxtaposition on the same horizontal slide 13 or 14 of several cylinders.

Bien sûr on comprend que les moteurs d'entraînement des cylindres tramés 3, 3' et de la roue dentée 16 sont connectés à un système électronique de commande, permettant de synchroniser les déplacements tels qu'ils ont été décrits ci-dessus. Plus particulièrement une synchronisation particulière doit être mise en oeuvre afin que lors de l'arrivée du cylindre dans la deuxième position, la roue dentée 6 correspondant vienne parfaitement se mettre en prise dans les dents de la crémaillère 15.Of course, it is understood that the drive motors of the screened cylinders 3, 3 ′ and of the toothed wheel 16 are connected to an electronic control system, making it possible to synchronize the movements as described above. More particularly, a particular synchronization must be implemented so that when the cylinder arrives in the second position, the corresponding toothed wheel 6 comes to perfectly engage in the teeth of the rack 15.

De plus, dans le cas de plus de deux cylindres tramés, il serait nécessaire de veiller à ce que le rangement des cylindres tramés sur les glissières horizontales 13, 14 soit toujours effecté dans le même ordre, afin d'éviter l'emmêlement des cables de raccordement des moteurs d'entraînement des cylindres tramés. Un tel rangement peut être obtenu en déplaçant certain cylindre tramé d'une glissière horizontale 13 à l'autre 14 en utilisant, comme base de déplacement, la face supérieure du coulisseau 7 d'un cylindre tramé en attente, ladite face étant dans l'alignement des deux glissières horizontales 13, 14.In addition, in the case of more than two screened cylinders, it would be necessary to ensure that the arrangement of the screened cylinders on the horizontal slides 13, 14 is always carried out in the same order, in order to avoid tangling of the cables. for connecting the drive motors of the screened cylinders. Such storage can be obtained by moving certain screened cylinder from a horizontal slide 13 to the other 14 by using, as a base of movement, the upper face of the slide 7 of a screened cylinder awaiting, said face being in the alignment of the two horizontal slides 13, 14.

Dans le second exemple de réalisation, illustré par les figures 8 à 12, la machine à imprimer est à lavage automatique du cylindre porte-cliché 1 et à escamotage de l'ensemble 17 constitué par le cylindre contre-pression 2 et le sytème de transfert des feuilles.In the second example of embodiment, illustrated by FIGS. 8 to 12, the printing machine is with automatic washing of the plate cylinder 1 and with retraction of the assembly 17 constituted by the back pressure cylinder 2 and the transfer system. leaves.

Le lavage du cylindre porte-cliché 1 est généralement réalisé manuellement lorsque la machine est à l'arrêt, ou encore en démontant le cylindre porte-cliché 1 et en le plaçant dans une installation spéciale de lavage.Washing of the plate cylinder 1 is generally carried out manually when the machine is stopped, or else by dismantling the plate cylinder 1 and placing it in a special washing installation.

Grâce au système de cylindre à double déplacement conforme à l'invention, il devient possible d'assurer un lavage automatique du cylindre porte-cliché 1, après escamotage complet du cylindre contre-pression 2.Thanks to the double displacement cylinder system according to the invention, it becomes possible to ensure an automatic washing of the plate cylinder 1, after complete retraction of the back pressure cylinder 2.

Dans le mode de réalisation qui va être décrit, le cylindre contre-pression 2 est solidaire du sytème de transfert du matériau à imprimer. On a donc un ensemble de transfert 17 qui est constitué du cylindre contre-pression 2, du moteur 18 asservi électroniquement, qui entraîne l'arbre 19 du cylindre contre-pression 2, un jeu de courroies 20, éventuellement crantées, montées en boucle autour de deux rouleaux d'entraînement 21, 22, le rouleau 22, situé près du cylindre contre-pression 2 étant également entraîné par le moteur 18. Le jeu de courroies 20 pourrait être remplacé par une succession de rouleaux d'entraînement.In the embodiment which will be described, the back-pressure cylinder 2 is integral with the system for transferring the material to be printed. There is therefore a transfer assembly 17 which consists of the back-pressure cylinder 2, of the electronically-controlled motor 18, which drives the shaft 19 of the back-pressure cylinder 2, a set of belts 20, possibly notched, mounted in a loop around two drive rollers 21, 22, the roller 22, located near the back pressure cylinder 2 also being driven by the motor 18. The set of belts 20 could be replaced by a succession of drive rollers.

Comme on peut le voir sur la figure 8, le jeu de courroies 20 véhicule le matériau imprimé, feuille par feuille, depuis le poste précédent 23.As can be seen in FIG. 8, the set of belts 20 conveys the printed material, sheet by sheet, from the previous station 23.

Eventuellement le jeu de courroies 20 peut être surmonté d'un dispositif infra-rouge 24 destiné au séchage de l'encre dans le cas où le poste précédent 23 est lui-même un poste d'impression.Optionally, the set of belts 20 can be surmounted by an infrared device 24 intended for drying the ink in the case where the preceding station 23 is itself a printing station.

Selon l'invention, l'arbre 19 du cylindre contre-pression 2 supporte à chacune de ses extrémités d'une part une roue dentée 25 et d'autre part un coulisseau 26, qui dans le cas d'espèce est une plaque métallique rectangulaire.According to the invention, the shaft 19 of the back pressure cylinder 2 supports at each of its ends on the one hand a toothed wheel 25 and on the other hand a slide 26, which in this case is a rectangular metal plate .

L'escamotage du cylindre de contre-pression 2 est réalisé par un premier déplacement vertical, grâce à des glissières verticales 27, 28 délimitant le parcours du coulisseau 26 entre la première position de travail du cylindre contre-pression 2 et la deuxième position intermédiaire. Un deuxième déplacement, entre ladite deuxième position et une troisième position de stockage est réalisé grâce à deux glissières horizontales 29, 30 délimitant le parcours du coulisseau 26 entre ces deux positions.The retraction of the back pressure cylinder 2 is achieved by a first vertical displacement, by means of vertical slides 27, 28 delimiting the path of the slide 26 between the first working position of the back pressure cylinder 2 and the second intermediate position. A second movement, between said second position and a third storage position is achieved by two horizontal slides 29, 30 defining the path of the slide 26 between these two positions.

L'entraînement du cylindre contre-pression 2 au cours du premier déplacement, et corrélativement de l'ensemble de transfert 17, et obtenu grâce un système de vis à billes, entraîné par moteur, l'écrou de la vis à billes supportant le coulisseau 26 entre la première et le deuxième position. De préférence le coulisseau 26 est pourvu d'une encoche dans laquelle pénètre l'écrou de la vis à billes pendant ce déplacement de manière à assurer son blocage. La disposition de l'encoche est telle que lorsque le coulisseau est entraîné de la deuxième vers la troisième position, l'écrou de la vis à billes sort de l'encoche, désolidarisant le système de transfert 17 du système de vis à billes.The drive of the back pressure cylinder 2 during the first movement, and correspondingly of the transfer assembly 17, and obtained by a ball screw system, driven by motor, the nut of the ball screw supporting the slide 26 between the first and the second position. Preferably, the slide 26 is provided with a notch into which the nut of the ball screw penetrates during this movement so as to ensure its blocking. The arrangement of the notch is such that when the slide is driven from the second to the third position, the nut of the ball screw comes out of the notch, separating the transfer system 17 from the ball screw system.

La machine est également équipée de crémaillères 31 horizontales, situées dans la zone entre les deux glissières horizontales 39 et 30.The machine is also equipped with horizontal racks 31, located in the area between the two horizontal slides 39 and 30.

Le dispositif mobile de lavage 32 est constitué d'un bac 33 de récupération du liquide de lavage et d'un ensemble comportant des brosses rotatives à déplacement axial et des jets d'eau. On peut bien sûr équiper ce dispositif mobile 32 de lavage de tous moyens mécaniques, pneumatiques, à ultra-sons... permettant de réaliser dans un court laps de temps le lavage du cylindre porte-cliché 1.The mobile washing device 32 consists of a tank 33 for recovering the washing liquid and of an assembly comprising rotary brushes with axial displacement and water jets. It is of course possible to equip this mobile washing device 32 with all mechanical, pneumatic, ultrasonic, etc. means allowing washing of the plate cylinder 1 to be carried out in a short time.

Le dispositif mobile de lavage 32 est, lorsque le cylindre contre-pression 2 est dans la première position de travail, situé dans un logement 33 qui est une partie en creux de l'embase 34 de la machine.The mobile washing device 32 is, when the back-pressure cylinder 2 is in the first working position, located in a housing 33 which is a hollow part of the base 34 of the machine.

Le déplacement vertical du dispositif de lavage 32 de son logement 33 jusqu'à la première position, c'est-à-dire à proximité immédiate du cylindre porte-cliché 1 est obtenu de préférence grâce aux mêmes moyens que ceux permettant d'assurer le déplacement vertical du cylindre contre-pression 2.The vertical movement of the washing device 32 from its housing 33 to the first position, that is to say in the immediate vicinity of the plate cylinder 1 is preferably obtained by the same means as those used to ensure the vertical displacement of the back pressure cylinder 2.

Pour ce faire le dispositif de lavage 32 est équipé, à chacune de ses extrémités d'un coulisseau, non représenté, apte à se déplacer, comme le coulisseau 26 du cylindre contre-pression 2 entre les glissières verticales 27, 28, pour réaliser le lavage automatique du cylindre porte-cliché 1.To do this, the washing device 32 is equipped, at each of its ends with a slide, not shown, capable of moving, like the slide 26 of the back pressure cylinder 2 between the vertical slides 27, 28, to carry out the automatic washing of the plate cylinder 1.

Dans l'exemple de réalisation où le cylindre contre-pression 2 est solidaire de l'ensemble de transfert 17, l'escamotage du jeu de courroies 20 est obtenu grâce également à deux tiges d'appui 35, 36 dont la position et le rôle seront explicités lors de la description qui va suivre des différentes étapes permettant l'escamotage complet du système de transfert 17 et l'installation automatique du dispositif de lavage 32.In the exemplary embodiment where the back-pressure cylinder 2 is integral with the transfer assembly 17, the retraction of the set of belts 20 is obtained also thanks to two support rods 35, 36 whose position and role will be explained during the description which follows of the various stages allowing the complete retraction of the transfer system 17 and automatic installation of the washing device 32.

Sur la figure 8 on a représenté le système de transfert 17 dans sa position de travail, à savoir le cylindre contre-pression 2 étant appliqué sur le cylindre porte-cliché 1 et le jeu de courroies 20 étant en amont et dans l'alignement horizontal de la ligne de tangence entre le cylindre porte-cliché 1 et le cylindre contre-pression 2.In Figure 8 there is shown the transfer system 17 in its working position, namely the back pressure cylinder 2 being applied to the plate cylinder 1 and the set of belts 20 being upstream and in horizontal alignment of the line of tangency between the plate cylinder 1 and the back pressure cylinder 2.

Afin que le jeu de courroies 20 ne soit pas totalement en porte-à-faux par rapport au système de vis à billes qui maintient en position cet ensemble 17, on a disposé au poste précédent 23, des tiges ou rouleaux de support 37.So that the set of belts 20 is not completely cantilevered with respect to the ball screw system which keeps this assembly 17 in position, rods or rollers of support 37 have been arranged at the previous station 23.

A la figure 9 on a représenté le premier déplacement du cylindre contre-pression 2 de la première position de travail vers la deuxième position, obtenu grâce à la rotation de la vis du système vis à billes et le déplacement corrélatif des coulisseaux 26 entre les glissières 27, 28.In Figure 9 there is shown the first movement of the back-pressure cylinder 2 from the first working position to the second position, obtained by rotation of the screw of the ball screw system and the correlative movement of the slides 26 between the slides 27, 28.

Pendant la première partie de ce déplacement, l'extrémité amont du jeu de courroies 20 était supportée par une tige d'appui 35, placée sur le bâti du poste précédent 23.During the first part of this movement, the upstream end of the set of belts 20 was supported by a support rod 35, placed on the frame of the previous station 23.

Dans la seconde partie de ce même premier déplacement, le tapis 20 est supporté par une seconde tige d'appui 36 fixée au bâti de la machine à imprimer.In the second part of this same first movement, the belt 20 is supported by a second support rod 36 fixed to the frame of the printing machine.

Ainsi lorsque le cylindre contre-pression 2 atteint la deuxième position comme illustré à la figure 10, le jeu de courroies 20 fait sensiblement un angle de 45° part rapport à l'horizontale.Thus when the back-pressure cylinder 2 reaches the second position as illustrated in FIG. 10, the set of belts 20 makes a substantially 45 ° angle apart from the horizontal.

L'escamotage complet du système transfert 17 est réalisé grâce au second déplacement du cylindre contre-pression 2 entre la deuxième position intermédiaire et la troisième position d'attente.The complete retraction of the transfer system 17 is achieved by the second displacement of the back pressure cylinder 2 between the second intermediate position and the third standby position.

Ce second déplacement est obtenu grâce à la rotation de l'arbre 19, entraîné par le moteur à asservissement électronique 18.This second movement is obtained by the rotation of the shaft 19, driven by the electronic servo motor 18.

Lors de l'arrivée du cylindre contre-pression 2 à la deuxième position, la roue dentée 25 s'est mise en prise sur les dents de la crémaillère horizontale 31. Ainsi lors de la rotation de l'arbre 19 dans le sens de la flèche F, la roue dentée 25 s'engrène sur la crémaillère 31 et se déplace sur celle-ci jusqu'à la position extrême correspondant à la position d'attente.When the back pressure cylinder 2 arrives at the second position, the gear 25 is engaged on the teeth of the horizontal rack 31. Thus during the rotation of the shaft 19 in the direction of the arrow F, the gear 25 meshes on the rack 31 and moves thereon to the extreme position corresponding to the waiting position.

Lors de ce déplacement horizontal le jeu de courroies 20 est resté en appui sur la tige 36, ce qui a entraîné un pivotement du sytème transfert 17, de sorte que le jeu de courroies 20 se trouve presque en position verticale lorsque le cylindre contre-pression 2 se trouve dans la troisième position d'attente, comme cela est représenté sur la figure 11.During this horizontal movement, the set of belts 20 remained in abutment on the rod 36, which resulted in a pivoting of the transfer system 17, so that the set of belts 20 is almost in the vertical position when the back-pressure cylinder 2 is in the third standby position, as shown in FIG. 11.

Une fois ce second déplacement réalisé, ou éventuellement en temps masqué, on effectue le déplacement vertical du dispositif de lavage entre sa position base où il est dans son logement 33, jusqu'à sa position haute ou il est à proximité du cylindre porte-cliché 1.Once this second movement has been made, or possibly in masked time, the washing device is moved vertically between its base position where it is in its housing 33, to its high position or it is near the plate cylinder. 1.

Un tel déplacement peut être obtenu par des moyens indépendants ou, de préférence, par les mêmes moyens que ceux mis en oeuvre pour assurer le premier déplacement vertical du cylindre contre-pression 2.Such displacement can be obtained by independent means or, preferably, by the same means as those used to ensure the first vertical displacement of the back-pressure cylinder 2.

S'agissant du système de vis à billes, dans un premier mode de réalisation, le dispositif de lavage 32 comporte une fourche qui est escamotable entre une position rentrée et une position sortie selon laquelle la vis à billes pénètre entre les bras de la fourche au-dessus de l'écrou de la vis à billes, le passage entre la position rentrée et la position sortie de la fourche se faisant sous l'action d'un contacteur de fin de course lors de l'arrivée du cylindre contre-pression 2 dans la troisième position d'attente.With regard to the ball screw system, in a first embodiment, the washing device 32 comprises a fork which is retractable between a retracted position and an extended position in which the ball screw penetrates between the arms of the fork at above the nut of the ball screw, the passage between the retracted position and the extended position of the fork being effected by the action of a limit switch when the counter-pressure cylinder arrives 2 in the third waiting position.

Dans un second mode de réalisation illustré par la figure 12, le dispositif de lavage 32 est monté à chacune de ses extrémités sur des coulisseaux 38 et la machine comporte également un jeu de pièces mobiles 39. Comme cela apparaît à l'examen de la figure 12, la pièce mobile 39 se trouve située sous le niveau de la glissière inférieure horizontale 30. Elle se caractérise d'autre part par trois épaulements 40, 41, 42, le premier 40 étant situé à son extrémité avant tandis que les deux autres épaulements 41, 42 sont situés à son extrémité arrière et délinitent entre eux un espace apte à former un logement pour le coulisseau 38 du dispositif de lavage 32.In a second embodiment illustrated by FIG. 12, the washing device 32 is mounted at each of its ends on slides 38 and the machine also includes a set of moving parts 39. As it appears on examining the figure 12, the moving part 39 is located below the level of the horizontal lower slide 30. It is further characterized by three shoulders 40, 41, 42, the first 40 being located at its front end while the other two shoulders 41, 42 are situated at its rear end and delimit between them a space capable of forming a housing for the slide 38 of the washing device 32.

Sur la figure 12 on a représenté la position prise par la pièce mobile 39 alors que le système de transfert 17 est en position de travail.In Figure 12 there is shown the position taken by the movable part 39 while the transfer system 17 is in the working position.

Lors du premier déplacement, et pour la majeure partie du second déplacement, la pièce mobile 39 reste dans cette même position.During the first movement, and for most of the second movement, the moving part 39 remains in this same position.

En fin de second déplacement, le coulisseau 26 supportant le cylindre de pression 2 vient s'appuyer sur le premier épaulement 40 et le repousse avec lui jusque dans la troisième position d'attente. Ceci entraîne corrélativement le déplacement de la pièce mobile 39. L'amplitude du déplacement de cette pièce 39, et donc la position du premier épaulement 40 par rapport à la troisième position d'attente, est déterminée en sorte que, lorsque ledit épaulement 40 est dans cette troisième position, le coulisseau 38 du dispositif de lavage 32 se trouve situé à l'aplomb des glissières verticales 27, 28.At the end of the second movement, the slide 26 supporting the pressure cylinder 2 comes to bear on the first shoulder 40 and pushes it back with it into the third waiting position. This correlatively causes the displacement of the movable part 39. The amplitude of the displacement of this part 39, and therefore the position of the first shoulder 40 relative to the third standby position, is determined so that, when said shoulder 40 is in this third position, the slide 38 of the washing device 32 is located directly above the vertical slides 27, 28.

Chaque coulisseau 26 du cylindre contre-pression 2 comporte une encoche 43, sensiblement horizontale, ouverte sur le côté gauche sur la figure 12. Chaque coulisseau 38 du dispositif de lavage 32 comporte une encoche 44, sensiblement horizontale, ouverte sur le côté droit. Lors du premier déplacement vertical de la première position à la deuxième position, l'écrou de la vis à billes 45 du système de vis à billes est dans les encoches 43 des coulisseaux 26 et supporte le cylindre contre-pression 2. Lors du second déplacement, horizontal, des coulisseaux 26 de la seconde vers la troisième position, l'écrou de la vis à billes 45 reste en place, sortant de l'encoche 43. Lorsque les coulisseaux 38 du dispositif de lavage 32 se déplacent vers la droite, vers l'aplomb des glissières verticales 27, 28 l'écrou de la vis à billes 45 pénètre dans l'encoche 44. Le système de vis à billes peut alors entraîner le dispositif de lavage 32 de la deuxième à la première position.Each slide 26 of the back-pressure cylinder 2 has a notch 43, substantially horizontal, open on the left side in FIG. 12. Each slide 38 of the washing device 32 has a notch 44, substantially horizontal, open on the right side. During the first vertical displacement from the first position to the second position, the nut of the ball screw 45 of the ball screw system is in the notches 43 of the slides 26 and supports the back-pressure cylinder 2. During the second displacement , horizontal, of the slides 26 from the second to the third position, the nut of the ball screw 45 remains in place, coming out of the notch 43. When the slides 38 of the washing device 32 move to the right, towards plumb with the vertical slides 27, 28 the nut of the ball screw 45 enters the notch 44. The ball screw system can then drive the washing device 32 from the second to the first position.

Claims (13)

Machine à imprimer équipée d'une pluralité de cylindres, caractérisée en ce qu'elle comporte, pour un cylindre donné, des premiers moyens de déplacement d'une première position correspondant à la position de travail à une deuxième position et des seconds moyens de déplacement de ladite deuxième position à une troisième position et en ce que l'arbre (5,19) dudit cylindre (3,2), à double déplacement, comportant un moteur individuel d'entraînement et des roues dentées (6,25) à ses deux extrémités, les seconds moyens de déplacement comprennent un jeu de deux crémaillères (15,31) dans lesquelles peuvent s'engrener les roues dentées (6,25), en sorte que le déplacement dudit cylindre (3,2) de la deuxième à la troisième position est obtenu grâce à la rotation du moteur d'entraînement de l'arbre (5, 19) dudit cylindre.Printing machine equipped with a plurality of cylinders, characterized in that it comprises, for a given cylinder, first means of displacement from a first position corresponding to the working position to a second position and second means of displacement from said second position to a third position and in that the shaft (5.19) of said cylinder (3.2), with double displacement, comprising an individual drive motor and toothed wheels (6.25) at its two ends, the second displacement means comprise a set of two racks (15,31) in which the toothed wheels (6,25) can mesh, so that the displacement of said cylinder (3,2) from the second to the third position is obtained by the rotation of the drive motor of the shaft (5, 19) of said cylinder. Machine à imprimer selon la revendication 1 caractérisée en ce que chaque extrémité de l'arbre du cylindre à double déplacement est solidaire d'un coulisseau (7,26), en ce que les premiers moyens de déplacement comportent un premier jeu de deux glissières (8,9 et 27, 28) délimitant le parcours desdits coulisseaux entre la première et la deuxième positions et sont aptes à déplacer simultanément les deux dits coulisseaux dans lesdites glissières.Printing machine according to Claim 1, characterized in that each end of the shaft of the double-displacement cylinder is integral with a slide (7,26), in that the first displacement means comprise a first set of two slides ( 8, 9 and 27, 28) delimiting the path of said sliders between the first and second positions and are capable of simultaneously moving the two said sliders in said slides. Machine à imprimer selon la revendication 2 caractérisée en ce que chaque coulisseau (7) comporte une crémaillère (11) et en ce que les premiers moyens de déplacement comportent un moteur entraînant un pignon (16) apte à s'engrener sur ladite crémaillère (11).Printing machine according to Claim 2, characterized in that each slide (7) comprises a rack (11) and in that the first displacement means comprise a motor driving a pinion (16) capable of meshing on said rack (11 ). Machine à imprimer selon la revendication 2 caractérisée en ce que chaque coulisseau (26) comporte une encoche (43) et en ce que les premiers moyens de déplacement comportent un moteur entraînant deux vis verticales à billes, chaque vis ayant une longueur au moins égale à la distance entre la première et la deuxième position et étant apte à passer dans l'encoche (43), en sorte que la l'écrou de la vis à billes (45) supporte le coulisseau entre la première et la deuxième positions et en ce que l'écrou de la vis à billes (45) puisse sortir de l'encoche (43) et être dégagée du coulisseau entre la deuxième et la troisième positions.Printing machine according to Claim 2, characterized in that each slide (26) has a notch (43) and in that the first displacement means comprise a motor driving two vertical ball screws, each screw having a length at least equal to the distance between the first and the second position and being able to pass in the notch (43), so that the nut of the ball screw (45) supports the slide between the first and the second position and in this that the ball screw nut (45) can come out of the notch (43) and be released from the slide between the second and the third positions. Machine à imprimer selon la revendication 1 à changement automatique de cylindres tramés caractérisée en ce qu'elle comporte au moins deux cylindres tramés (3,3') , à double déplacement, l'un étant dans la troisième position dite de stockage tandis que l'autre est dans la première position dite de travail et en ce qu'elle comporte des troisièmes moyens de déplacement desdits cylindres tramés (3,3') de la deuxième à une quatrième position, qui est dans la même direction mais opposée à celle du déplacement de la seconde direction à la troisième position, le changement de cylindres tramés (3,3') s'effectuant en actionnant les premiers, deuxièmes et troisièmes moyens de déplacement en sorte que le cylindre (3) qui est en position de travail passe à la deuxième puis la quatrième position et en ce que le cylindre (3') qui est dans la troisième position de stockage passe à la deuxième puis à la première position de travail.Printing machine according to claim 1 with automatic change of screened cylinders characterized in that it comprises at least two screened cylinders (3,3 '), with double displacement, one being in the third so-called storage position while the 'other is in the first so-called working position and in that it comprises third means for moving said screened cylinders (3,3') from the second to a fourth position, which is in the same direction but opposite to that of displacement from the second direction to the third position, the change of screened cylinders (3.3 ′) being effected by actuating the first, second and third displacement means so that the cylinder (3) which is in the working position passes to the second then the fourth position and in that the cylinder (3 ') which is in the third storage position passes to the second and then to the first working position. Machine à imprimer selon les revendications 1, 3 et 5, comportant un cylindre porte-cliché, caractérisée en ce que, le cylindre tramé (3) étant placé au-dessus du cylindre porte-cliché (1), la première direction est verticale, en ce que les troisièmes moyens de déplacement comportent un deuxième jeu de crémaillères (15) dans lesquelles peuvent s'engrener les roues dentées (6) dudit cylindre tramé (3), en ce qu'elle comporte un second et un troisième jeux de glissières horizontales (13, 14) s'étendant respectivement entre la deuxième et la troisième et entre la deuxième et la quatrième positions,en ce qu'elle comporte deux pièces de transfert (10), avec crémaillère (12), agencée en sorte que les deux pièces de transfert (10) supportent les coulisseaux (7) du cylindre tramé (3) en position de travail et que le passage dudit cylindre (3) de la première à la deuxième position soit réalisé par entraînement du pignon (16) engrené sur les crémaillères (11, 12) du coulisseau (7) puis de la pièce de transfert (10), et en ce que le passage du cylindre de la deuxième à la troisième ou à la quatrième position est réalisé par entraînement des roues dentées (46') du cylindre (3,3') engrené sur le premier ou le second jeu de crémaillères (15) et par glissement des coulisseaux (7) sur le deuxième ou le troisième jeu de glissières horizontales (13, 14).Printing machine according to claims 1, 3 and 5, comprising a plate cylinder, characterized in that, the screen cylinder (3) being placed above the plate cylinder (1), the first direction is vertical, in that the third displacement means comprise a second set of racks (15) in which the toothed wheels (6) of said screen cylinder (3) can mesh, in that it comprises a second and a third set of slides horizontal (13, 14) extending respectively between the second and the third and between the second and the fourth positions, in that it comprises two transfer pieces (10), with rack (12), arranged so that the two transfer pieces (10) support the slides (7) of the screened cylinder (3) in the working position and the passage of said cylinder (3) from the first to the second position is carried out by driving the pinion (16) geared on the racks (11 , 12) of the slide (7) then of the transfer part (10), and in that the passage of the cylinder from the second to the third or to the fourth position is carried out by driving the toothed wheels (46 ') of the cylinder (3.3 ') engaged on the first or second set of racks (15) and by sliding the slides (7) on the second or third set of horizontal slides (13, 14). Machine à imprimer selon la revendication 6 caractérisée en ce qu'un cylindre tramé (3) peut passer de la quatrième position à la troisième position de stockage par déplacement sur les glissières horizontales (13, 14) et sur la face supérieure des coulisseaux (7) d'un autre cylindre tramé (3') qui est en position d'attente, ladite face supérieure étant dans l'alignement des glissières horizontales (13, 14).Printing machine according to Claim 6, characterized in that a screened cylinder (3) can pass from the fourth position to the third storage position by displacement on the horizontal slides (13, 14) and on the upper face of the slides (7 ) another screened cylinder (3 ') which is in the standby position, said upper face being in alignment with the horizontal slides (13, 14). Machine à imprimer selon la revendication 1 caractérisée en ce qu'elle comporte un cylindre contre-pression (2) à double déplacement placé en position de travail sous le cylindre porte-cliché (1), un dispositif mobile de lavage (32) du cylindre porte-cliché (1) et des moyens de déplacement dudit dispositif de lavage aptes à l'amener à proximité du cylindre porte-cliché (1) lorsque le cylindre contre-pression (2) est passé de la première à la troisième position.Printing machine according to Claim 1, characterized in that it comprises a double-displacement back-pressure cylinder (2) placed in the working position under the plate cylinder (1), a mobile device for washing the cylinder (32) plate holder (1) and means for moving said washing device capable of bringing it near the plate holder cylinder (1) when the counter-pressure cylinder (2) has moved from the first to the third position. Machine à imprimer selon la revendication 8 caractérisée en ce que la première direction est sensiblement verticale et en ce que le dispositif mobile de lavage (32) est, lorsque le cylindre porte-pression (2) est en position de travail, placé dans un logement qui est situé à proximité de la deuxième position, et en ce que les moyens de déplacement dudit dispositif de lavage comprennent les premiers moyens de déplacement du cylindre contre-pression.Printing machine according to Claim 8, characterized in that the first direction is substantially vertical and in that the mobile washing device (32) is, when the pressure cylinder (2) is in the working position, placed in a housing which is located near the second position, and in that the means for moving said washing device comprise the first means for moving the back-pressure cylinder. Machine à imprimer selon les revendications 4 et 9 caractérisée en ce que les moyens de déplacement du dispositif de lavage comportent une fourche qui est solidaire dudit dispositif et qui est escamotable entre une position rentrée et une position sortie selon laquelle la vis à billes pénètre entre les bras de la fourche au-dessus de l'écrou de la vis à billes, le passage entre la position rentrée et la position sortie de la fourche se faisant sous l'action d'un contacteur de fin de course lors de l'arrivée du cylindre de contre-pression dans la troisième position.Printing machine according to claims 4 and 9 characterized in that the means for moving the washing device comprise a fork which is integral with said device and which is retractable between a retracted position and an extended position in which the ball screw penetrates between the arm of the fork above the nut of the ball screw, the passage between the retracted position and the extended position of the fork being effected by the action of a limit switch when the back pressure cylinder in the third position. Machine à imprimer selon les revendications 4 et 9 caractérisée en ce que les moyens de déplacement du dispositif de lavage (32) comportent des coulisseaux (38) pourvus d'une encoche (44) et une pièce mobile (39) à trois épaulements (40, 41, 42) agencés en sorte que, lors du déplacement de la deuxième à la troisième position, le coulisseau (26) du cylindre contre-pression (2) repousse le premièr épaulement (40) et entraîne la pièce mobile (39) sur une deuxième position telle que le coulisseau (38) qui est logé entre les deux autres épaulements (41, 42) se trouve à l'aplomb des deux glissières verticales (27, 28), l'écrou de la vis à billes (45) du système de vis à billes ayant pénétré dans l'encoche (44).Printing machine according to Claims 4 and 9, characterized in that the means for moving the printing device washing (32) comprise slides (38) provided with a notch (44) and a movable part (39) with three shoulders (40, 41, 42) arranged so that, when moving from the second to the third position , the slide (26) of the back-pressure cylinder (2) pushes the first shoulder (40) and drives the moving part (39) to a second position such as the slide (38) which is housed between the other two shoulders (41 , 42) is plumb with the two vertical slides (27, 28), the nut of the ball screw (45) of the ball screw system having entered the notch (44). Machine à imprimer selon l'une des revendications 1, 8, 9, 10 ou 11 caractérisée en ce qu'elle comporte un cylindre contre-pression (2) à double déplacement et un système de transfert du matériau à imprimer qui est solidaire rigidement du cylindre contre-pression et en ce qu'elle comporte de plus des tiges d'appui (35, 36) sur lesquelles le système transfert prend appui et pivote sur lui-même lors du passage du cylindre de contre-pression de la première à la troisième position.Printing machine according to one of claims 1, 8, 9, 10 or 11 characterized in that it comprises a double-pressure back-pressure cylinder (2) and a system for transferring the printing material which is rigidly secured to the back-pressure cylinder and in that it further comprises support rods (35, 36) on which the transfer system is supported and pivots on itself when the back-pressure cylinder passes from the first to the third position. Machine à imprimer selon la revendication 12 caractérisée en ce que le système de transfert ayant une direction sensiblement horizontale lorsque le cylindre contre-pression est en position de travail, les tiges d'appui (35, 36) sont disposées en sorte que le système de transfert a une direction sensiblement verticale lorsque le cylindre contre-pression est dans la troisième position.Printing machine according to Claim 12, characterized in that the transfer system having a substantially horizontal direction when the back-pressure cylinder is in the working position, the support rods (35, 36) are arranged so that the printing system transfer has a substantially vertical direction when the back pressure cylinder is in the third position.
EP94490003A 1993-02-12 1994-01-21 Printing machine, incorporating at least one double-displacement cylinder Expired - Lifetime EP0611240B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9301866 1993-02-12
FR9301866A FR2701425B1 (en) 1993-02-12 1993-02-12 Printing machine comprising at least one double displacement cylinder.

Publications (2)

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EP0611240A1 true EP0611240A1 (en) 1994-08-17
EP0611240B1 EP0611240B1 (en) 1995-10-11

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EP94490003A Expired - Lifetime EP0611240B1 (en) 1993-02-12 1994-01-21 Printing machine, incorporating at least one double-displacement cylinder

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US (1) US5463950A (en)
EP (1) EP0611240B1 (en)
CN (1) CN1096482A (en)
DE (1) DE69400025T2 (en)
ES (1) ES2081228T3 (en)
FR (1) FR2701425B1 (en)

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ITMI20131003A1 (en) * 2013-06-18 2014-12-19 Nuova Gidue Srl DEVICE AND METHOD FOR THE REPLACEMENT OF THE PRINTING CYLINDERS OF A PRINTING GROUP, PARTICULARLY FOR ROTARY FLEXOGRAPHIC MACHINES IN LINE.
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Also Published As

Publication number Publication date
DE69400025D1 (en) 1995-11-16
EP0611240B1 (en) 1995-10-11
FR2701425B1 (en) 1995-05-12
CN1096482A (en) 1994-12-21
ES2081228T3 (en) 1996-02-16
DE69400025T2 (en) 1996-04-11
US5463950A (en) 1995-11-07
FR2701425A1 (en) 1994-08-19

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