EP0425935B1 - Dispositif de mise en tension parallèle des plaques d'impression - Google Patents

Dispositif de mise en tension parallèle des plaques d'impression Download PDF

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Publication number
EP0425935B1
EP0425935B1 EP90120083A EP90120083A EP0425935B1 EP 0425935 B1 EP0425935 B1 EP 0425935B1 EP 90120083 A EP90120083 A EP 90120083A EP 90120083 A EP90120083 A EP 90120083A EP 0425935 B1 EP0425935 B1 EP 0425935B1
Authority
EP
European Patent Office
Prior art keywords
tensioning
pressure bar
rail
cylinder
supported
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90120083A
Other languages
German (de)
English (en)
Other versions
EP0425935A3 (en
EP0425935A2 (fr
Inventor
Manfred Herold
Herbert Rebel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Priority to AT90120083T priority Critical patent/ATE101360T1/de
Publication of EP0425935A2 publication Critical patent/EP0425935A2/fr
Publication of EP0425935A3 publication Critical patent/EP0425935A3/de
Application granted granted Critical
Publication of EP0425935B1 publication Critical patent/EP0425935B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1218—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices
    • B41F27/1225—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices moving in the printing plate end substantially rectilinearly
    • B41F27/1231—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices moving in the printing plate end substantially rectilinearly by translatory motion substantially tangential to support surface

Definitions

  • the invention relates to a device for parallel clamping of printing plates on a plate cylinder according to the preamble of the first claim.
  • Such a device is known (DE-PS 3 516 682) and is used so that printing plates can be clamped in parallel with a defined clamping force in order to achieve register accuracy, but at the same time, during the final clamping, the known correction options of the printed image with a divided clamping rail and the associated clamping screws maintain. It is difficult to manufacture and assemble the construction parts so precisely that the rear split tensioning rail is advanced exactly parallel to the front duct wall. An overload of the pressure plate cannot be excluded. Automatic re-tensioning is not possible while the machine is running.
  • the object of the invention is to improve the input-specified device so that a regulation of the tension of printing plates and their automatic re-tensioning is made possible uniformly over the entire width, especially in the case of large-format printing machines.
  • the plate cylinder 1 of a printing press has means for fastening and tensioning printing plates in a cylinder channel 2.
  • these fastening means are designed as a front tensioning rail 3 divided over the length of the plate cylinder 1 and a correspondingly divided rear tensioning rail 4, and are each arranged at the start of print 5 and at the end of print 6 of the cylinder channel 2.
  • the divided clamping rails 3, 4 are arranged in a known manner in the cylinder channel 2 and are actuated by means of clamping screws 10, 11.
  • the pressure plate front edge and the pressure plate rear edge are also clamped in a known manner by clamping devices 21, 22.
  • the front clamping rail 3 and the rear clamping rail 4 are arranged in a known manner on parallel guides, not shown and displaceable in the tangential or approximately tangential direction.
  • the pressure plate is arranged in the front clamping rail 3 in a known manner fixed in a zero position, for. B. with the help of dowel bolts.
  • the quick-action clamping device consists of a pressure bar 9 arranged along the cylinder channel 2 in a recess 7 of the plate cylinder 1 which runs behind the channel wall 8 and which is displaceable along the cylinder channel 2.
  • the pressure bar 9 has two recesses 13 one above the other with an inclined plane, which slide on wedge surfaces on counterparts 14, so that a parallel movement of the pressure bar 9 in the circumferential direction can be carried out to quickly clamp the pressure plate.
  • tensioning levers 15, 16 are arranged mirror-inverted to one another along the contact surface of the pressure bar 9, with each tensioning screw 11 being assigned a tensioning lever 15 and 16, respectively.
  • the mirror image arrangement is not absolutely necessary.
  • the tensioning levers 15, 16 are supported on the pressure bar 9 by means of a molded-on cam 17 with lever transmission.
  • One end of each of the clamping levers 15, 16 is connected to the split rear clamping rail 4 by means of a swivel joint 18 (FIG. 4).
  • the other free end of the tensioning lever 15, 16 is supported under the action of a spring 12 supported by a cylinder on a stop bolt 19 which is fastened on the connecting line of the joints 18 in the rear tensioning rail 4.
  • the pivot levers 15, 16 are supported on the counterpart 14 via the cams 17 and the lower recess 13 of the pressure bar 9 from, while the clamping screws 11 of the upper recess 13 opposite to the pressure bar 9 can be supported.
  • the pressure bar 9 can be actuated from a central position in the middle of the cylinder by its adjusting spindle 20, which is arranged in the axial direction between the front tensioning rail 3 and the rear tensioning rail 4 and can be displaced in the tangential direction and can be provided with a hexagon or a knurling or a quick tensioning device with a ratchet .
  • a spindle nut 23 is provided which is displaceable in the axial direction and which is firmly connected to the pressure bar 9 via a bridge 24.
  • the adjusting spindle 20 is supported with its spherical end faces on both sides on support walls 25 via unequal pressure pieces 29, 30, which are interchangeable, so that the clamping range can be expanded by moving these parts and different long pressure plates can be tensioned uniformly (Figure 5).
  • the plate cylinder 1 is rotated by one turn to place the printing plate.
  • the trailing end of the pressure plate is then clamped in the clamping device 21.
  • the spring 12 arranged in the tangential direction is supported on the support walls 25. It may be advantageous to arrange the support wall so that it can be adjusted relative to the plate cylinder 1 in order to be able to increase or decrease the plate tension over the changed spring travel of the spring 12 supported on the support wall.
  • adjusting screws 27 are also provided in a known manner, which are supported on the rear clamping rail 4 on an arm 28 provided in the cylinder center plane, while on the front clamping rail 3 they are supported on the outside of the cylinder side walls.
  • the register correction in the circumferential direction is carried out in a known manner by means of the tensioning screws 11, in which case the spring 12 relaxes.
  • the free end of the clamping levers 15, 16 abuts the stop pin 19.
  • the tensioning of the pressure plate takes place during the correction process via the tensioning screws 11, whereby a combined use of the tensioning screw 11 or tensioning springs 12 is also possible after the direction of correction.
  • they In order to bring the clamping screws 11 into operation, they only have to be turned into the distance "a" (time advantage). Play changes in the adjusting means, in particular clamping screws 11, do not occur.
  • the front one Tensioning rail 3 is also supported on the support wall 25 by a compression spring 26 arranged in the tangential direction.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Devices For Checking Fares Or Tickets At Control Points (AREA)
  • Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Rotary Presses (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Claims (3)

  1. Dispositif pour la tension parallèle de plaques d'impression sur les cylindres porte-plaque d'imprimantes, comportant dans le canal du cylindre porte-plaque un rail de serrage séparé avant et un rail de serrage séparé arrière, dans lesquels les extrémités des plaques d'impression peuvent être serrées et qui peuvent être déplacés, pour l'essentiel en direction périphérique du cylindre porte-plaque, par l'intermédiaire de vis de serrage séparées les unes des autres en direction axiale, les vis de serrage du rail de serrage avant étant directement en appui contre la paroi opposée du canal et le rail de serrage arrière pouvant être serré par un dispositif de serrage rapide, qui comporte un montage en série constitué d'un mécanisme de serrage rapide pour le pré-serrage et des vis de serrage pour le serrage définitif, une barre de pression étant agencée, comme mécanisme de serrage rapide, le long du canal du cylindre, dans un évidement du cylindre porte-plaque s'étendant dans le plan arrière de la paroi du canal et parallèlement à celle-ci, les vis de serrage du rail de serrage arrière pouvant s'appuyer contre cette barre de pression, des évidements présentant un plan incliné étant de plus pratiqués sur la barre de pression, auxquels évidements sont associées des surfaces cunéiformes correspondantes sur une contre-pièce, la barre de pression pouvant être déplacée en direction du canal du cylindre, par l'intermédiaire d'un dispositif d'actionnement central, la barre de pression étant déplacée en direction périphérique conjointement avec le rail de serrage arrière,
    caractérisé en ce qu'un levier de serrage (15,16) est associé à chaque vis de serrage (11), levier de serrage qui est agencé le long de la barre de pression (9), au-dessous du rail de serrage arrière (4), en ce que les leviers de serrage (15,16) s'appuient sur la barre de pression (9), par l'intermédiaire d'une came (17), avec un rapport des leviers augmentant la force, une extrémité des leviers de serrage (15,16) étant reliée, de façon à pouvoir pivoter, au rail de serrage arrière séparé (4), au moyen d'une charnière (18), et l'autre extrémité libre des leviers de serrage (15,16) s'appuyant sur un boulon de butée (19), sous l'action d'un ressort (12) fixé au cylindre (25), boulon de butée (19) qui est fixé sur la ligne de liaison des charnières (18) dans le rail de serrage arrière (4), et en ce que, lors du déplacement de la barre de pression (9), au moyen du dispositif d'actionnement (20,23,24,25), à partir d'une position (figure 6), les extrémités libres des leviers pivotants (16) peuvent être pivotées, autour de la charnière (18) associée, de façon à s'éloigner du boulon de butée (19), sous l'action du ressort (12) (figure 7).
  2. Dispositif selon la revendication 1,
    caractérisé en ce que le ressort (12) s'appuie contre une paroi d'appui (25) qui est agencée, en direction axiale, entre le rail de serrage avant (3) et le rail de serrage arrière (4).
  3. Dispositif selon l'une des revendications 1 ou 2,
    caractérisé en ce que la barre de pression (9) peut être actionnée par une broche de réglage rotative (20) agencée entre le rail de serrage avant (3) et le rail de serrage arrière (4) en direction axiale, sur laquelle broche de réglage (20) un écrou à broche (23) peut être coulissé, écrou à broche qui est fixé à la barre de pression (9) par l'intermédiaire d'une pièce rapportée (24), la broche de réglage (20) étant en appui, par ses faces frontales convexes, des deux côtés, contre des pièces de pression (29,30) non identiques et amovibles, sur des parois d'appui (25) parallèles à l'axe (figure 5).
EP90120083A 1989-11-02 1990-10-19 Dispositif de mise en tension parallèle des plaques d'impression Expired - Lifetime EP0425935B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90120083T ATE101360T1 (de) 1989-11-02 1990-10-19 Vorrichtung zum parallelen spannen von druckplatten.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3936459A DE3936459C1 (fr) 1989-11-02 1989-11-02
DE3936459 1989-11-02

Publications (3)

Publication Number Publication Date
EP0425935A2 EP0425935A2 (fr) 1991-05-08
EP0425935A3 EP0425935A3 (en) 1991-09-04
EP0425935B1 true EP0425935B1 (fr) 1994-02-09

Family

ID=6392713

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90120083A Expired - Lifetime EP0425935B1 (fr) 1989-11-02 1990-10-19 Dispositif de mise en tension parallèle des plaques d'impression

Country Status (5)

Country Link
US (1) US5076167A (fr)
EP (1) EP0425935B1 (fr)
JP (1) JPH0749220B2 (fr)
AT (1) ATE101360T1 (fr)
DE (2) DE3936459C1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3933678A1 (de) * 1989-10-09 1991-04-18 Miller Johannisberg Druckmasch Vorrichtung zum positionsgenauen spannen einer druckplatte auf einem druckzylinder
DE4034494C1 (fr) * 1990-10-30 1992-03-05 Heidelberger Druckmaschinen Ag, 6900 Heidelberg, De
DE4111636C1 (fr) * 1991-04-10 1992-07-30 Man Roland Druckmaschinen Ag, 6050 Offenbach, De
CA2111201A1 (fr) * 1992-04-13 1993-10-28 Masaaki Matsuo Appareil de transfert de l'image
DE4214167A1 (de) * 1992-04-30 1993-11-04 Roland Man Druckmasch Vorrichtung zum schraenken von druckplatten auf dem plattenzylinder von druckmaschinen, insbesondere bogenoffsetdruckmaschinen
DE4219870C2 (de) * 1992-06-17 2002-07-18 Heidelberger Druckmasch Ag Verfahren zum automatischen Druckplattenwechsel
US5347928A (en) * 1992-10-29 1994-09-20 Sakurai Graphic Systems Corporation Plate clamping unit for offset press
DE4244279C2 (de) * 1992-12-28 1995-05-18 Heidelberger Druckmasch Ag Druckformkorrektureinrichtung zum Ausgleich von Druckträgerdehnungen

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1471777A (fr) * 1966-03-18 1967-03-03 Schnellpressenfab Heidelberg Dispositif de serrage rapide sur les cylindres de machines à imprimer
DE2501511C2 (de) * 1975-01-16 1983-06-01 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8900 Augsburg Vorrichtung zum Befestigen einer biegsamen Druckplatte auf dem Plattenzylinder einer Rotationsdruckmaschine
JPS5967055A (ja) * 1982-10-09 1984-04-16 Komori Printing Mach Co Ltd 枚葉輪転印刷機の版万力装置
DE3516682A1 (de) * 1985-05-09 1986-11-13 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Vorrichtung zum parallelen spannen von druckplatten auf dem plattenzylinder von druckmaschinen
DE3606351A1 (de) * 1986-02-27 1987-09-03 Heidelberger Druckmasch Ag Vorrichtung zum aufspannen von biegsamen druckplatten auf dem plattenzylinder von rotationsdruckmaschinen
DE3866063D1 (de) * 1987-08-25 1991-12-12 Heidelberger Druckmasch Ag Vorrichtung zum aufspannen von biegsamen druckplatten auf dem plattenzylinder von rotationsdruckmaschinen.
DE3731684A1 (de) * 1987-09-21 1989-04-06 Koenig & Bauer Ag Aufspannvorrichtung
DE3936458C1 (fr) * 1989-11-02 1991-04-11 Man Roland Druckmaschinen Ag, 6050 Offenbach, De

Also Published As

Publication number Publication date
US5076167A (en) 1991-12-31
JPH03159744A (ja) 1991-07-09
EP0425935A3 (en) 1991-09-04
JPH0749220B2 (ja) 1995-05-31
DE3936459C1 (fr) 1991-04-18
EP0425935A2 (fr) 1991-05-08
ATE101360T1 (de) 1994-02-15
DE59004549D1 (de) 1994-03-24

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