EP0683047A1 - Dispositif pour fixer une plaque d'impression - Google Patents

Dispositif pour fixer une plaque d'impression Download PDF

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Publication number
EP0683047A1
EP0683047A1 EP95103229A EP95103229A EP0683047A1 EP 0683047 A1 EP0683047 A1 EP 0683047A1 EP 95103229 A EP95103229 A EP 95103229A EP 95103229 A EP95103229 A EP 95103229A EP 0683047 A1 EP0683047 A1 EP 0683047A1
Authority
EP
European Patent Office
Prior art keywords
plate cylinder
strip
clamping
terminal
strips
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.)
Granted
Application number
EP95103229A
Other languages
German (de)
English (en)
Other versions
EP0683047B1 (fr
Inventor
Ingo Köbler
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
Publication of EP0683047A1 publication Critical patent/EP0683047A1/fr
Application granted granted Critical
Publication of EP0683047B1 publication Critical patent/EP0683047B1/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 fastening printing plates according to the preamble of claim 1.
  • the printing plates are usually clamped on a plate cylinder between a clamping bar which is fixed with respect to the plate cylinder and a clamping bar which is movably mounted relative to the latter.
  • the mechanism for applying the clamping force between the movable and the fixed terminal block can consist, for example, of an eccentric shaft.
  • Fastening devices for printing plates in which the clamping force is applied by spring elements, are known from JP 3-252A and DE 4 129 831 A1.
  • an upper terminal strip is movably mounted relative to a lower terminal strip which is fixed to the cylinder by means of a degree guide, the upper terminal strip being pressed against the lower terminal strip by compression springs attached in the lower, fixed terminal strip.
  • An eccentric shaft is provided for introducing a new pressure plate or for removing a used pressure plate, by means of which the upper clamping bar is lifted from the lower clamping bar against the force of the spring elements.
  • the upper clamping bar is mounted in a cylinder-fixed manner and the lower clamping bar is mounted so that it can be pressed against it under spring preload.
  • this fastening device is opened by restoring elements acting counter to the spring force.
  • a disadvantage of these previously known fastening devices for printing plates is, on the one hand, the structural outlay in order to mount one terminal strip so that it can move relative to the other. Furthermore, in order to ensure a sufficient fastening force for the printing plate, a plurality of spring elements must be accommodated in corresponding recesses across the format width of the terminal strip and plate cylinder, which in turn represents a manufacturing outlay.
  • DE 3 806 526 C2 discloses a mounting of a tensioning rail with respect to the plate cylinder formed from leaf springs.
  • the leaf spring is not used to attach (clamp) a pressure plate.
  • the object of the present invention is therefore to develop a device for fastening printing plates in accordance with the preamble of claim 1 in such a way that the disadvantages mentioned are avoided.
  • the movable clamping bar is supported by at least one leaf spring element with respect to the cylinder-fixed clamping bar, this leaf spring element being set in such a way that the holding force for the pressure plate is applied between the movable and the fixed clamping bar.
  • the leaf spring elements provided thus represent the bearing and the spring elements for the terminal strips.
  • the one terminal strip is mounted as a coupling in the manner of a coupling quadrilateral with the two leaf springs as rockers relative to the other clamping strip as a frame.
  • FIG. 1 shows a part of a plate cylinder 1 with a pit 2 mounted therein.
  • a lower clamping strip 3 is attached, for example, in one piece and extends across the format width of the plate cylinder 1.
  • the clamped end of the leaf spring 5 facing surfaces of the terminal block 3 and the bar 6 are made in a slope, so that the leaf spring 5 is held by a curvature of a bias when its other end on the terminal block 3rd lies on.
  • the movable terminal block 4 is formed in this embodiment by the pivotable end of the leaf spring 5.
  • Pressure plate is thus held between the surfaces of the movable clamping bar 4 formed by the pivotable end of the leaf spring 5 and the lower clamping bar 3 by the force of the preloaded leaf spring 5.
  • an actuating device 8 is provided between the leaf spring 5 and the clamping strip 3, which in this exemplary embodiment is an eccentric shaft or a shaft a flat is formed.
  • actuating elements 8 can also be provided here.
  • this shaft is, as shown in FIG. 1, embedded in a groove-shaped groove in the terminal strip 3 below the leaf spring 5.
  • the fastening device for printing plates shown in FIG. 1, consisting of the clamping strip 3 with the leaf spring 5 clamped therein, can either be made in one piece extending over the format width of the plate cylinder 1 or else it can be divided one or more times. Furthermore, it is possible that, for example, the terminal strip 3 extends in one piece over the format width and a plurality of divided leaf springs 5 are attached.
  • the actuating element 8 When the actuating element 8 is designed to release the terminal strip 4 from the terminal strip 3 by bending the leaf spring 5 as an eccentric shaft or a shaft with a flattening, as shown in FIG. 1, this shaft is in a trough-shaped groove in the terminal strip 3 below the leaf spring 5 let in.
  • the terminal strip 3 is designed here as an angle rail with two additional strips 3.1, 3.2.
  • a pair of leaf springs 5 are clamped between two additional strips 3.1 and 3.2 via fastening screws 7 spaced axially apart from one another.
  • the upper terminal block 4 is designed as an angle rail, at the end facing the bottom of the pit 2 via two further strips 4.1, 4.2 and axially spaced fastening screws 7, the ends of the pair of leaf springs 5 are clamped.
  • the upper terminal block 4 is thus movably mounted relative to the lower terminal block 3 via the pair of leaf springs 5 in the manner of a parallel suspension or a parallel rocker (with the terminal block 4 as a coupling).
  • an actuating element 8 is attached which is supported on the terminal strip 3, which is shown in FIG. 2 as an eccentric shaft or as a shaft with a flattened portion.
  • the storage of the terminal block 4 via the leaf springs 5 with respect to the terminal block 3 is here placed under tension so that between the upper surface of the bar 3.2 and the opposite surface of the terminal block 4, the force necessary to hold a pressure plate is generated.
  • the actuating element 8 the terminal strip 4 can be lifted off the terminal strip 3 or the strip 3.2 against the pretension of the leaf springs 5. A gap thus arises between the terminal strip 4 and the upper surface of the strip 3.2, so that a clamped pressure plate can be removed or a new pressure plate can be inserted.
  • the actuating element 8 guides the upper clamping strip 4, which is guided over the prestressed leaf springs 5, predominantly in a straight vertical manner.
  • the additional bending of the leaf springs 5 results in only a slight horizontal movement.
  • the leaf springs 5 run at an angle to one another in order to achieve an additional pivoting movement of the terminal strip 4 when opening.
  • the upper terminal block 4 is also supported by a pair of leaf springs 5 with respect to the lower terminal block 3.
  • the terminal strip 3 is essentially designed as a U-profile.
  • One end of a leaf spring 5 is clamped in each case by one leg of the U-profile-shaped clamping strip 3 relative to one another by means of strips 3.1, 3.2 and fastening screws 7 spaced apart in the axial direction of the plate cylinder 1.
  • the ends of the leaf springs 5 are attached to the underside of the upper terminal block 4 via two strips 4.1, 4.2 and further fastening screws 7.
  • dashed screws 7 are indicated by dashed lines, which are axially offset in the axial direction of the plate cylinder 1 with respect to the fastening screws 7 penetrating the strips 4.1 and 4.2 from below.
  • the leaf springs 5 result in an anti-parallel rocker with the terminal block 4 as a coupling element.
  • Fig. 3 shows the fastening device according to the invention for printing plates in the so-called clamping position.
  • a pressure plate is clamped here by the prestressing of the leaf springs 5 between the underside of the terminal strip 4 and the top of the strip 3.1 connected to the terminal strip 3.
  • the shaft of the actuating element 8 which is symbolically provided here as an eccentric shaft or as a shaft with a flattened portion, the upper terminal strip 4 is pressed upwards over the strips 4.1, 4.2 against the bias of the leaf springs 5 with a simultaneous slight pivoting movement in the clockwise direction. There is thus a relatively large gap for inserting a new pressure plate between the underside of the upper terminal strip 4 and the correspondingly opposite surface of the strip 3.1.
  • the fastening device shown in FIGS. 3 and 4 is preferably suitable as a tensioning device for the printing end of the plate cylinder 1.
  • the lower clamping bar 3 is preferably movably mounted parallel to the bottom of the pit 2 of the plate cylinder 1 (guide means not shown).
  • a clamping device 9 is arranged between a wall of the pit 2 and the opposite surface of the terminal strip 3 or the bar 3.1, by means of which the terminal strip 3 can be moved in the direction of the center of the pit 2. As a result, a clamped pressure plate is stretched around the outer circumference of the plate cylinder 1.
  • the holding force to be provided is to set the pressure plate between the terminal strips 3 and 4 by a corresponding preloading of the leaf springs 5 to be provided according to the invention.
  • the leaf springs 5 can preferably be made of spring steel with a predetermined profile or curvature.
  • a plurality of leaf springs 5 can also be arranged at an angle to one another.
  • the fastening device according to the invention for printing plates consisting of the terminal strips 3 and 4 and their connection via the leaf springs 5, can be formed in one part but also in several parts over the format width of the plate cylinder 1.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Connection Of Plates (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
EP95103229A 1994-03-25 1995-03-07 Dispositif pour fixer une plaque d'impression Expired - Lifetime EP0683047B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4410385 1994-03-25
DE4410385A DE4410385C2 (de) 1994-03-25 1994-03-25 Vorrichtung zum Befestigen von Druckplatten

Publications (2)

Publication Number Publication Date
EP0683047A1 true EP0683047A1 (fr) 1995-11-22
EP0683047B1 EP0683047B1 (fr) 1997-07-23

Family

ID=6513840

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95103229A Expired - Lifetime EP0683047B1 (fr) 1994-03-25 1995-03-07 Dispositif pour fixer une plaque d'impression

Country Status (3)

Country Link
EP (1) EP0683047B1 (fr)
AT (1) ATE155740T1 (fr)
DE (2) DE4410385C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009027508A1 (de) * 2009-07-07 2011-01-20 Manroland Ag Greifer einer bogenhandhabenden Maschine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10024087C2 (de) * 2000-05-18 2002-05-08 Torald Rohloff Vorrichtung zum Befestigen einer Druckplatte auf einem Zylinder einer Rotationsdruckmaschine
DE102012207106B4 (de) * 2012-04-27 2015-04-02 Koenig & Bauer Aktiengesellschaft Plattenzylinder

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2378478A (en) * 1943-02-18 1945-06-19 Goss Printing Press Co Ltd Printing press gripper mechanism
DE1761308A1 (de) * 1968-05-02 1971-05-13 Polygraph Leipzig Verfahren und Vorrichtung zum Klemmen von Materialbogen
DD237815A1 (de) * 1985-05-31 1986-07-30 Polygraph Leipzig Vorrichtung zur befestigung einer biegsamen druckplatte
EP0276736A2 (fr) * 1987-01-24 1988-08-03 BASF Aktiengesellschaft Dispositif de tension de plaques d'impression

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD261770A1 (de) * 1987-07-02 1988-11-09 Polygraph Leipzig Vorrichtung zum befestigen einer biegsamen druckplatte
DD261769A1 (de) * 1987-07-02 1988-11-09 Polygraph Leipzig Vorrichtung zum befestigen einer biegsamen druckplatte
DE3806526A1 (de) * 1988-03-01 1989-09-14 Heidelberger Druckmasch Ag Vorrichtung zum spannen von biegsamen druckplatten am plattenzylinder von rotationsdruckmaschinen
DE3900818C1 (fr) * 1989-01-13 1990-05-10 Heidelberger Druckmaschinen Ag, 6900 Heidelberg, De
JPH0649369B2 (ja) * 1989-05-29 1994-06-29 アキヤマ印刷機製造株式会社 枚葉印刷機の版締め装置
DE4129831C3 (de) * 1990-12-21 1998-08-13 Heidelberger Druckmasch Ag Schnellklemmvorrichtung
DE4315906A1 (de) * 1993-05-12 1994-11-17 Philips Patentverwaltung Stromversorgungsschaltung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2378478A (en) * 1943-02-18 1945-06-19 Goss Printing Press Co Ltd Printing press gripper mechanism
DE1761308A1 (de) * 1968-05-02 1971-05-13 Polygraph Leipzig Verfahren und Vorrichtung zum Klemmen von Materialbogen
DD237815A1 (de) * 1985-05-31 1986-07-30 Polygraph Leipzig Vorrichtung zur befestigung einer biegsamen druckplatte
EP0276736A2 (fr) * 1987-01-24 1988-08-03 BASF Aktiengesellschaft Dispositif de tension de plaques d'impression

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009027508A1 (de) * 2009-07-07 2011-01-20 Manroland Ag Greifer einer bogenhandhabenden Maschine

Also Published As

Publication number Publication date
EP0683047B1 (fr) 1997-07-23
DE4410385C2 (de) 1997-07-17
DE59500409D1 (de) 1997-08-28
DE4410385A1 (de) 1995-09-28
ATE155740T1 (de) 1997-08-15

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