EP0331777B1 - Dispositif pour fixer, par tension, un revêtement sur un cylindre d'une machine rotative - Google Patents

Dispositif pour fixer, par tension, un revêtement sur un cylindre d'une machine rotative Download PDF

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Publication number
EP0331777B1
EP0331777B1 EP19880103685 EP88103685A EP0331777B1 EP 0331777 B1 EP0331777 B1 EP 0331777B1 EP 19880103685 EP19880103685 EP 19880103685 EP 88103685 A EP88103685 A EP 88103685A EP 0331777 B1 EP0331777 B1 EP 0331777B1
Authority
EP
European Patent Office
Prior art keywords
tensioning
cylinder
tensioning device
pistons
groove
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
EP19880103685
Other languages
German (de)
English (en)
Other versions
EP0331777A1 (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
Priority to DE19873707066 priority Critical patent/DE3707066A1/de
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Priority to EP19880103685 priority patent/EP0331777B1/fr
Publication of EP0331777A1 publication Critical patent/EP0331777A1/fr
Application granted granted Critical
Publication of EP0331777B1 publication Critical patent/EP0331777B1/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
    • B41F27/1237—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 perpendicular to support surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F30/00—Devices for attaching coverings or make-ready devices; Guiding devices for coverings
    • B41F30/04—Devices for attaching coverings or make-ready devices; Guiding devices for coverings attaching to transfer cylinders

Definitions

  • the invention relates to a tensioning device for fastening an elevator to the cylinder of a rotary printing press - preferably blanket tensioning device to the blanket cylinder of a web offset rotary printing press - according to the preamble of claim 1.
  • Such a clamping device is known from US Pat. No. 2,209,127 for the attachment of printing plates to a plate cylinder.
  • this tensioning device both ends of a support carrying the actual pressure plates are inserted into two recesses of the same height in a tensioning bar.
  • the clamping bar is then moved in the direction of the center of the cylinder by screwing in screws which are anchored through it and anchored in the bottom of a cylinder pit.
  • This device has the disadvantage that in order to achieve a uniform tension in the elevator, a uniform movement of the numerous screws distributed over the length of a pit is required. Such a uniform screwing in of the screws can be achieved either only with increased expenditure on operating personnel or with a complex device.
  • the invention is based on the object of developing a generic tensioning device in such a way that it enables uniform tensioning of the elevator over the entire cylinder length with simple operation from a single point.
  • a pit 2 with a rectangular cross section is machined parallel to its axis. From the bottom 3 of this pit 2, blind-hole-like bores are made at regular intervals towards the center of the cylinder, which serve as working cylinders 4 for pistons 5 which are axially movable therein.
  • the working cylinders 4 are closed to the pit floor 3 by cover plates 6.
  • the cover plates 6 fastened in the pit floor 3 by means of screws 7 each have a central passage bore 8.
  • a piston rod 9 fastened to the piston 5 is led upwards out of the working cylinder 4.
  • the free end of the guided out piston rod 9 is provided with a thread which is screwed into a blind hole thread 10 on the underside of a clamping bar 11.
  • a lock nut 12 arranged on the thread of the piston rod 9 allows the distance between the piston 5 and the clamping bar 11 to be adjusted.
  • the clamping bar 11 has a width in its lower part which corresponds approximately to that of the pit 2. In the upper part, the clamping bar 11 is reduced in width on both sides by two recesses 13 and 14 which are rectangular in cross section. The recesses 13 and 14 are delimited at the top by two laterally projecting shoulders 15 and 16 at the outer end of the tensioning strip 11.
  • a feed channel 18 opens out at the side, the other end of which is connected to a pressure storage space 19 provided inside the blanket cylinder 1.
  • the pressure storage space 19 can be filled with a pressurized fluid via a check valve 21 inserted into a side wall 20 of the blanket cylinder 1.
  • the pressure storage space 19 is filled with a pressurized fluid, for example compressed air.
  • a pressurized fluid for example compressed air.
  • the fluid reaches the working spaces of the working cylinders 4 via the supply channels 18 above the pistons 5 17 exceeds, the pistons 5 are moved downward and the clamping bar 11 is slowly pulled down over the piston rods 9. Due to the controlled increase in pressure, the blanket 24 can be subjected to a precisely defined tension, regardless of slight length differences.
  • the pressure storage space 19 is simply relieved of the storage pressure via the valve 21 or a special relief valve (not shown).
  • the spring 17 ⁇ is arranged above the piston 5 in the working cylinder 4.
  • the clamping bar 11 holds its compressive force in the basic position in the pit 2.
  • the feed channel 18 ⁇ opens into the lower part of the working cylinder 4. Accordingly, energy is applied to the piston 5 only to extend the tensioning strip 11 for a change of the rubber blanket 24.
  • the pressure storage space 19 in the interior of the cylinder is relieved of pressure.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Claims (5)

  1. Dispositif tendeur pour la fixation d'un revêtement sur un cylindre d'une presse rotative à imprimer, de préférence dispositif tendeur de blanchet prévu sur le cylindre porte-blanchet d'une rotative offset à bobines -, comprenant une rainure s'étendant parallèlement à l'axe dans la surface latérale du cylindre et une barre de tension déplaçable radialement vers l'intérieur dans cette rainure lors du processus de mise en tension, barre dont la partie supérieure dirigée vers l'extérieur présente deux évidements situés à la même hauteur sur les deux côtés de la barre et destinés à recevoir les extrémités du revêtement, ainsi que des moyens de tension ancrés dans le fond de la rainure et fixés à la barre de tension, caractérisé en ce que les moyens de tension sont formés de plusieurs vérins dont les cylindres (4) sont ménagés à intervalles réguliers dans le fond (3) de la rainure et dont les pistons (5), disposés axialement mobiles dans ces cylindres, peuvent être sollicités simultanément, tout au moins pendant le processus de tension, par de l'énergie amenée par l'intérieur du cylindre porte-blanchet.
  2. Dispositif tendeur selon la revendication 1, caractérisé en ce que les pistons (5) sont déplaçables, pendant le processus de tension, à l'encontre de la force d'un ressort (17, 17') placé à l'intérieur de chaque cylindre (4).
  3. Dispositif tendeur selon la revendication 1 ou 2, caractérisé en ce que les cylindres (5) sont formés par des trous borgnes s'étendant radialement vers l'intérieur à partir du fond (3) de la rainure et fermés chacun, au niveau du fond (3) de la rainure, par une plaque de recouvrement (6) pourvue d'un perçage central (8) de passage.
  4. Dispositif tendeur selon une des revendications 1 à 3, caractérisé en ce que les pistons (5) sont reliés à la barre de tension (11) par des tiges de piston (9) traversant les perçages (8).
  5. Dispositif tendeur selon une des revendications 1 à 4, caractérisé en ce que pour l'apport d'énergie, on utilise un fluide sous pression, qui peut être amené au cylindre (4) des vérins par des canaux d'alimentation (18, 18') à partir d'un espace (19) ménagé à l'intérieur du cylindre porte-blanchet et constituant un accumulateur de pression.
EP19880103685 1987-03-05 1988-03-09 Dispositif pour fixer, par tension, un revêtement sur un cylindre d'une machine rotative Expired - Lifetime EP0331777B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19873707066 DE3707066A1 (de) 1987-03-05 1987-03-05 Spannvorrichtung zur befestigung eines aufzuges am zylinder einer rotationsdruckmaschine
EP19880103685 EP0331777B1 (fr) 1988-03-09 1988-03-09 Dispositif pour fixer, par tension, un revêtement sur un cylindre d'une machine rotative

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19880103685 EP0331777B1 (fr) 1988-03-09 1988-03-09 Dispositif pour fixer, par tension, un revêtement sur un cylindre d'une machine rotative

Publications (2)

Publication Number Publication Date
EP0331777A1 EP0331777A1 (fr) 1989-09-13
EP0331777B1 true EP0331777B1 (fr) 1991-09-04

Family

ID=8198788

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880103685 Expired - Lifetime EP0331777B1 (fr) 1987-03-05 1988-03-09 Dispositif pour fixer, par tension, un revêtement sur un cylindre d'une machine rotative

Country Status (1)

Country Link
EP (1) EP0331777B1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3934334C1 (fr) * 1989-10-14 1991-04-11 Heidelberger Druckmaschinen Ag, 6900 Heidelberg, De
DE4326251C2 (de) * 1993-08-05 1997-08-28 Koenig & Bauer Albert Ag Gummi-/Drucktuchzylinder
US5735211A (en) * 1996-06-13 1998-04-07 Mark Andy, Inc. Clamping and tensioning device for printing plates
US6073558A (en) * 1998-07-20 2000-06-13 Heidelberger Druckmaschinen Ag Printing press having blanket cylinder with filler bar and blanket

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2555037A1 (de) * 1975-12-06 1977-06-08 Philips Patentverwaltung Abtastgeraet mit einer drehbaren walze zum aufspannen eines aufzeichnungsblattes
FR2527520A1 (fr) * 1982-05-27 1983-12-02 Cuir Jean Pierre Dispositif de fixation d'une plaque sur un cylindre
DE3707066A1 (de) * 1987-03-05 1988-09-15 Roland Man Druckmasch Spannvorrichtung zur befestigung eines aufzuges am zylinder einer rotationsdruckmaschine

Also Published As

Publication number Publication date
EP0331777A1 (fr) 1989-09-13

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