EP0875378B2 - Dispositif de serrage - Google Patents

Dispositif de serrage Download PDF

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Publication number
EP0875378B2
EP0875378B2 EP98106692A EP98106692A EP0875378B2 EP 0875378 B2 EP0875378 B2 EP 0875378B2 EP 98106692 A EP98106692 A EP 98106692A EP 98106692 A EP98106692 A EP 98106692A EP 0875378 B2 EP0875378 B2 EP 0875378B2
Authority
EP
European Patent Office
Prior art keywords
cylinder
printing
forme
clamping device
clamping
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
EP98106692A
Other languages
German (de)
English (en)
Other versions
EP0875378B1 (fr
EP0875378A1 (fr
Inventor
Helmut Schild
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7828199&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0875378(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0875378A1 publication Critical patent/EP0875378A1/fr
Publication of EP0875378B1 publication Critical patent/EP0875378B1/fr
Application granted granted Critical
Publication of EP0875378B2 publication Critical patent/EP0875378B2/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 clamping device for printing forms to be fastened on a forme cylinder of printing presses according to the preamble of claim 1.
  • the printing plates designed as printing plates are attached with their ends to clamping devices which are arranged as rails in a pit of the printing plate or plate cylinder.
  • These clamping rails consist of an upper and a lower clamping rail, which can be adjusted against each other with a force to hold the pressure plate end.
  • the upper clamping rail part can be arranged in a cylinder-fixed manner and the lower clamping rail part can be arranged to be movable relative to the latter, or the lower clamping rail is fixed in a cylinder-fixed manner and the upper part is movably mounted.
  • DE 34 01 351 A1 discloses a quick-action clamping bar for fastening a printing plate to printing presses, which has an upper clamping rail which is fixed in a cylinder and which is arranged opposite a lower clamping rail which is movable via an eccentric or camshaft.
  • the listed parts work directly in a form-fitting manner to clamp a pressure plate between the upper and lower part, so that the highest manufacturing quality must be maintained so that the clamping force is applied evenly over the entire width of the format, particularly in the case of a large-format machine.
  • a quick-clamping device in the form of a tensioning rail with a cylinder-fixed upper and a radially movable lower part is known, the force to be applied for clamping a pressure plate being applied here by prestressed springs.
  • the springs are pressed over. Due to the fact that the clamping force is applied by the springs, the clamping force is automatically adjusted to different plate thicknesses and furthermore the clamping force is largely evened out over the format width of the cylinder or the extension length of the tensioning rail.
  • a disadvantage is that to open such a device, the corresponding force must be permanently applied by the actuating means, i.e.
  • this tensioning rail is to be kept in the open state for a longer period of time and also the cylinder carrying this device is to be moved or rotated, the element designed, for example, as an actuating means which can be pressurized must be permanently supplied with compressed oil or compressed air. Furthermore, the manufacturing outlay for introducing the corresponding depressions for the spring elements to be integrated in the tensioning rail, together with the articulations for restoring elements acting on the spring elements, is to be regarded as disadvantageous.
  • the object of the present invention is therefore to expand a clamping device in accordance with the preamble of claim 1 such that a spring-elastic clamping for fastening a pressure plate is possible in a structurally simple manner.
  • the clamping device to be created should in particular also simplify the workflow in an automated printing form change.
  • the actuating device moving the upper and the lower part is supported with a spring elasticity relative to the cylinder or the actuating device has the spring elasticity integrated so that when the clamping force is built up the actuating device with a given flexibility, in particular to different pressure plate thicknesses
  • the actuating device is designed as a shaft which extends over the format width of the clamping rails (of the printing form cylinder) and on which individual cam or eccentrics are arranged at an axial distance from one another. These cams or eccentrics act directly (without the interposition of corresponding spring elements or the like) on the in particular radially movable lower part, which cooperates with the upper part of the clamping rail which is fixedly arranged in the cylinder.
  • the shaft as the actuating device which extends over the format width of the cylinder (the extension length of the clamping rail), is rotatably received in bearings between the cams or eccentrics arranged in sections, so that in each case one cam or eccentric cooperating with the radially movable lower part lies between two adjacent bearing blocks.
  • the spring elasticity of this embodiment according to the invention is given by the deflection of the shaft section extending between the bearing blocks, that is to say when the shaft is pivoted from the open position to the clamped position, the shaft undergoes a deflection, which thus adjusts the radially movable bottom bar to different ones Printing plate thicknesses enabled.
  • the clamping device By means of the clamping device according to the invention it is not only possible to fix different printing plate thicknesses on a printing form cylinder and to generate largely uniform clamping forces over the format width of the cylinder or the length of the rail, but also new possibilities arise when changing a printing form or Printing plate.
  • the actuating device designed as a shaft is pivoted into an end position both for opening and for closing (clamping) with the application of force, it is possible to move the printing form or plate cylinder even with the clamping rail open.
  • the actuating device designed as a shaft is pivoted into an end position both for opening and for closing (clamping) with the application of force, it is possible to move the printing form or plate cylinder even with the clamping rail open.
  • the forme cylinder is moved by turning backwards until, for example, the end of the printing form unwound from the outer circumference can be held by a holding device on the protection of the printing unit, so that when the cylinder is turned forwards, the area of the printing plate held by the opened clamping device is pulled out of this clamping gap.
  • the fastening device according to the invention is particularly suitable for automating the fastening of a printing plate on the printing form cylinder or plate cylinder of a printing press. It is possible to arrange the introduction of force for the actuating device mounted in the cylinder, which is preferably designed as a shaft with cams or eccentrics, so that the corresponding coupling can take place with a cylinder position with respect to this introduction of force.
  • the clamping rail can be opened and the printing plate or plate cylinder can then be moved backwards by a predetermined angular range in order to bring the end of the plate unwound from the printing plate or plate cylinder into engagement with a holding device.
  • the actuating device designed as a shaft with cams or eccentrics is brought into a stable end position for opening the clamping rail, it is not necessary to apply the force for opening the clamping rail permanently. After the printing form or plate cylinder has been moved back into its starting position corresponding to the force introduction device, the clamping device can then be closed.
  • the clamping rail 1 consists of an upper part 2 arranged in a cylinder-fixed manner and a radially movably mounted lower part 3, each of which is designed as a rail that extends in particular over the format width of the printing form or plate cylinder (not shown) (FIGS. 1-4).
  • bearing blocks 6 are arranged below the radially movable lower part 3, axially spaced apart, into which the end of screws 4 are screwed, the shank of which is mounted in a respective longitudinal opening in a corresponding opening of the lower part 3 , Pressure springs 5 are arranged between the head of the screws 4 and a taper of the bore in the lower part 3, through which the lower part 3 is brought into the open position to open the corresponding clamping surfaces between the upper part 2 and the lower part 3.
  • FIGS. 2, 5 and 6 show the straight guidance of the radially movable upper part 3 with respect to the upper part 2.
  • a plurality of screws 8 are provided, axially spaced apart, which are replaced by corresponding ones Openings 8.1 are passed through in the lower part and their ends are screwed into corresponding threads in the upper part 2 of the clamping rail 1.
  • the head of the screws 8 cooperates with a flat surface of the openings 8.1, which run parallel to the radial direction of movement of the lower part 3.
  • a shaft 7 is rotatably received through the plurality of bearing blocks axially spaced apart and arranged below the lower part 3 and each has a cam or eccentric 9 in the areas located between the bearing blocks 6.
  • the cams or eccentrics 9 of the shaft 7 each interact with a roller 10 attached in the lower region of the lower part 3 (FIGS. 3-6).
  • FIG. 1 The open position of the lower part 3 relative to the upper part 2 of the clamping rail 1 according to the invention is shown in FIG.
  • the shaft 7 has been pivoted in such a position that the rollers 10 of the movable lower part 3 come to rest on a smaller radius of the cams or eccentrics 9 of the shaft.
  • the clamping gap of the clamping rail 1 defined by the clamping surfaces of the lower part 3 and upper part 2 is opened.
  • FIG. 3 shows the closed state of the clamping rail 1, which corresponds to the clamping state.
  • the rollers 10 of the lower part 3 come to rest on the large radius of the cams or eccentrics 9, so that the lower part 3 lies over the rollers 10 is pressed with a corresponding force against the cylinder-fixed upper part 2.
  • a pressure plate held by the clamping surfaces between the lower part 3 and the upper part 2 is not shown.
  • Figure 7 shows in principle the arrangement of the shaft 7 with a cam or eccentric 9 between two bearing blocks 6 supporting the shaft 7.
  • the orientation of the shaft 7 corresponds to the open position, i.e. the position of the cam or eccentric 9 in connection with the roller 10, as shown in Figure 4. If the shaft 7 together with the cam or eccentric 9 is now pivoted into the position for closing the lower part 3, the shaft 7 experiences a deflection between the support points of the bearing blocks 6 in accordance with the applied clamping force.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Clamps And Clips (AREA)
  • Jigs For Machine Tools (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Claims (6)

  1. Dispositif de serrage pour fixer des clichés sur le cylindre porte-cliché de machines d'impression, en particulier pour fixer des plaques d'impression sur le cylindre porte-plaque de machines d'impression offset à feuilles, constitué d'une partie supérieure et d'une partie inférieure (2,3), une partie étant montée de façon solidaire du cylindre et l'autre partie coopérant de façon correspondante avec celle-ci étant montée de façon mobile dans au moins approximativement la direction radiale du cylindre, d'un dispositif d'actionnement (7) agissant sur la partie supérieure ou la partie inférieure mobile pour l'ouverture et le serrage, ainsi que de pièces (9,10) transmettant élastiquement par ressort la force de serrage sur la partie supérieure ou la partie inférieure mobile (2, 3),
    caractérisé en ce qu'au moins une pièce du dispositif d'actionnement (7) agissant sur la partie supérieure ou la partie inférieure mobile (2,3) présente une élasticité de ressort devenant effective lors de la génération de la force de serrage, le dispositif d'actionnement étant réalisé comme un arbre (7), lequel est appuyé de façon solidaire du cylindre par l'intermédiaire de paliers (6) écartés axialement les uns des autres, et peut être cintré, dans une mesure prédéfinie, entre les paliers (6) par la force de serrage à appliquer.
  2. Dispositif de serrage selon la revendication 1,
    caractérisé en ce que l'arbre (7) présente, entre deux paliers (6), à chaque fois au moins un excentrique (9) ou une came coopérant avec la partie inférieure ou la partie supérieure (3,2).
  3. Dispositif de serrage selon la revendication 2,
    caractérisé en ce que la partie inférieure ou la partie supérieure (3,2) présente, à chaque fois, un galet (10) coopérant avec la came ou l'excentrique (9) de l'arbre (7).
  4. Procédé pour changer des clichés du cylindre porte-cliché de machines d'impression, en particulier pour changer des plaques d'impression du cylindre porte-plaque de machines d'impression offset à feuilles, le cliché étant retiré de la zone de prise d'un dispositif de serrage après l'ouverture du dispositif de serrage associé au début de l'impression du cylindre et maintenant le bord avant du cliché, et, pour ouvrir et fermer le dispositif de serrage, le cylindre porte-cliché étant déplacé dans des positions prédéfinies et tourné, pour changer le cliché, dans des sens prédéfinis, en utilisant un dispositif de serrage selon une des revendications 1 à 3,
    caractérisé en ce que, après l'ouverture du dispositif de serrage associé au début de l'impression du cylindre et maintenant le bord avant du cliché, le cylindre porte-cliché est tourné en arrière d'une valeur angulaire prédéfinie, en ce que le cliché est fixé en position à la fin du mouvement par maintien d'au moins une partie du cliché, et en ce que, ensuite, le cylindre porte-cliché est tourné en avant, jusqu'à ce que le bord avant du cliché ait été retiré du dispositif de serrage ouvert.
  5. Procédé selon la revendication 4,
    caractérisé en ce que, après la fixation en position du cliché, le cylindre porte-cliché est à nouveau tourné en avant dans la position dans laquelle l'ouverture du dispositif de serrage maintenant le bord avant du cliché est effectuée, et, dans cette positon, un nouveau cliché est introduit dans la zone de prise ouverte du dispositif de serrage.
  6. Procédé selon la revendication 4 ou 5,
    caractérisé en ce que le cliché enlevé du cylindre porte-cliché, après le montage d'un nouveau cliché sur le cylindre porte-cliché, est retiré de la position fixée.
EP98106692A 1997-04-30 1998-04-11 Dispositif de serrage Expired - Lifetime EP0875378B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19718234 1997-04-30
DE19718234 1997-04-30

Publications (3)

Publication Number Publication Date
EP0875378A1 EP0875378A1 (fr) 1998-11-04
EP0875378B1 EP0875378B1 (fr) 2000-07-19
EP0875378B2 true EP0875378B2 (fr) 2003-09-10

Family

ID=7828199

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98106692A Expired - Lifetime EP0875378B2 (fr) 1997-04-30 1998-04-11 Dispositif de serrage

Country Status (4)

Country Link
EP (1) EP0875378B2 (fr)
JP (1) JP2975002B2 (fr)
AT (1) ATE194801T1 (fr)
DE (3) DE59800202D1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10241284B3 (de) * 2002-09-06 2004-03-18 Koenig & Bauer Ag Klemmvorrichtung für eine Druckplatte
DE202018001624U1 (de) * 2018-03-28 2019-07-03 Herold Maschinenbau Gmbh Klemmvorrichtung zur Befestigung von Druckplatten auf einem Plattenzylinder

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1265163B (de) * 1965-03-20 1968-04-04 Heidelberger Druckmasch Ag Vorrichtung zum Befestigen einer biegsamen Druckplatte auf dem Formzylinder einer Rotationsdruckmaschine
DE2606773C3 (de) * 1976-02-19 1984-06-20 Erich 4600 Dortmund Bock Vorrichtung zum Befestigen und Spannen einer biegsamen Druckplatte auf einem bzw. einen Formzylinder einer Rotationsdruckmaschine
DE3401351A1 (de) * 1984-01-17 1985-07-25 Horst 5600 Wuppertal Kieper Schnellspannleiste zum befestigen einer druckplatte an druckmaschinen
JP2509511Y2 (ja) * 1990-05-25 1996-09-04 株式会社小森コーポレーション 印刷機の版万力装置
DE4129831C3 (de) * 1990-12-21 1998-08-13 Heidelberger Druckmasch Ag Schnellklemmvorrichtung

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Formelsammlung Technische Mechanik, Institut für Mechanik, 1978, Seite 36 †
Hoischer, Technisches Zeichnen, 17. Auflage, Seiten 60-61 †

Also Published As

Publication number Publication date
DE19816996A1 (de) 1998-11-05
DE19816995B4 (de) 2008-09-11
DE19816995A1 (de) 1998-11-05
EP0875378B1 (fr) 2000-07-19
EP0875378A1 (fr) 1998-11-04
JPH10305561A (ja) 1998-11-17
ATE194801T1 (de) 2000-08-15
DE59800202D1 (de) 2000-08-24
JP2975002B2 (ja) 1999-11-10

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