EP0858890B1 - Cylindre porte-plaque avec un mécanisme de serrage insérable et son procédé d'utilisation - Google Patents

Cylindre porte-plaque avec un mécanisme de serrage insérable et son procédé d'utilisation Download PDF

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Publication number
EP0858890B1
EP0858890B1 EP98100795A EP98100795A EP0858890B1 EP 0858890 B1 EP0858890 B1 EP 0858890B1 EP 98100795 A EP98100795 A EP 98100795A EP 98100795 A EP98100795 A EP 98100795A EP 0858890 B1 EP0858890 B1 EP 0858890B1
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EP
European Patent Office
Prior art keywords
lock
plate
plate cylinder
jaw
axial slot
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
EP98100795A
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German (de)
English (en)
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EP0858890A1 (fr
Inventor
Jackson Hacker Jones
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.)
Heidelberger Druckmaschinen AG
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Heidelberger Druckmaschinen AG
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Publication of EP0858890A1 publication Critical patent/EP0858890A1/fr
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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
    • B41F27/1262—Devices for attaching printing elements or formes to supports for attaching flexible printing formes without tensioning means

Definitions

  • the present invention relates to a plate clamping mechanism used for fastening a printing plate is used in an offset printing machine, and a method for the use of this mechanism.
  • the present invention relates an apparatus and a method by which a conventional flat printing plate the mounting on the plate cylinder of the offset printing machine in a cylindrical Form is brought and clamped, thus the attachment and replacement of the To facilitate pressure plate on the plate cylinder.
  • the cylindrically shaped and closed pressure plate is then through the cutout in the machine wall on the Plate cylinder moves, in such a way that the engaged with each other Ends are inserted into the axial slot in the plate cylinder. It a slot mechanism located in the slot is then actuated to the Fasten the pressure plate on the plate cylinder.
  • a problem with the prior art device is that complicated and sometimes difficult to make bends at the ends of the pressure plate are around the plate ends during the application and fastening process hold together.
  • the device includes a clamping mechanism which is removed from the plate cylinder and preferably again in an axial slot in the plate cylinder can be included.
  • the axial slot can be provided with a device which holds the clamping mechanism after it is inserted into the axial slot, and which clamps the plate on the plate cylinder.
  • the method according to the invention comprises the steps of removing the Clamping mechanism from the plate cylinder and opening of the clamping mechanism.
  • the Both ends of a flat pressure plate are bent by approx. 90 °, then the Plate bent into a cylindrical shape.
  • the bent ends of the plate, which after the cylindrical shape are approximately parallel to each other, are then in inserted the clamping mechanism.
  • the clamping mechanism is closed, the ends of the plate being secured and the plate in its preformed cylindrical shape is held.
  • the clamping mechanism holding the plate then becomes inserted as a unit in the axial slot of the plate cylinder.
  • the plate cylinder has a series of compressed air openings on its circumference which when attaching the plate held by the clamping unit to the Plate cylinder is blown with compressed air.
  • the compressed air causes a slight expansion of the Plate and creates an air cushion between the plate cylinder and the plate, what that Applying the plate to the cylinder is easier.
  • the in the axial slot of the The plate clamping unit inserted is then secured to the
  • the present invention does not require complicated bends Pressure plate ends to the plate when applied and attached in a cylindrical shape to keep. Therefore, the device of the present invention is considerably simpler to apply and facilitates the attachment of printing plates compared to the Prior art devices many times over.
  • FIG. 3 shows the present invention during an initial clamping operation the application of the printing plate 13 to a plate cylinder 11, which during the Standstill of the printing machine, not shown, preferably flying in one Side wall of the same is stored.
  • the plate 13, which is originally flat, has Ends 14, 15 which are angled or bent by approximately 90 °.
  • the plate 13 is in brought into a substantially cylindrical shape, the bent ends 14, 15th run side by side and approximately parallel to each other and thus become narrower Gap 19 extends along the length of the cylindrically shaped plate 13.
  • the ends 14, 15 using any known technique, e.g. by gluing, spot welding or by a hole connection, in which a hole through both ends (14, 15) in the Is punched in such a way that the material of the one engages in the hole of the other end, be connected to each other.
  • a stand 20 is provided, on which this is temporarily suspended freely during a clamping process.
  • the Ends 14, 15 of the cylindrical plate 13 are in an axial slot of the Clamping mechanism 18 inserted.
  • the Clamping mechanism 18 closed after the plate ends 14, 15 in the axial Slot 12 of the clamping mechanism 18 are inserted so that the cylindrical plate 13th is fixed in the clamping mechanism 18. Since the clamping mechanism 18 the Plate ends 14, 15 compresses tightly, which narrows along the length of the cylindrical plate 13 extending gap 19 so that the plate 13 in its cylindrical shape is fixed.
  • FIGS. 4 and 5 show this process of attachment the plate 13 on the plate cylinder 11.
  • the plate cylinder 11 In the plate cylinder 11 there is an axial Slot 21, which preferably extends over the entire width of the cylinder and which has a width and depth that the insertion of the clamping mechanism 18th easily possible.
  • the plate cylinder 11 is in one with its one end 27 a bearing 25 located on a side wall 26 of the machine frame.
  • the other end 28 of the plate cylinder 11 is detachable in a storage, not shown stored; this storage can when applying and removing the plate 13 from Plate cylinder 11 are pivoted away.
  • the way in which the end 28 of the plate cylinder 11 is releasably mounted is known in the prior art.
  • Air supply channels 23, 24 are supplied with compressed air, which then flows out of the openings 22.
  • On End 29 of the combination of plate 13 and clamping mechanism 18 is in Installation direction, i.e. moved towards the end 28 of the plate cylinder 11 so that the clamping mechanism 18 after it has been inserted into the axial slot 21, slides along the slot 21.
  • the compressed air flowing out of the openings 22 causes a slight stretching of the inner diameter of the plate 13 so that during sliding the plate 13 via the plate cylinder 11, a space between the inner diameter the plate 13 and the outer diameter of the plate cylinder 11 is formed. Different expressed, the compressed air flowing out of the openings 23 forms an air cushion, via that slides the plate 13.
  • the clamping mechanism 18 is along the axial slot 21 moves until the plate 13 completely covers the plate cylinder 11. After that the Compressed air supply in the channel 24 stopped, causing the plate 13 on the outer surface of the Plate cylinder 11 can shrink slightly. After that it will be during of the slide-open operation free end 28 of the plate cylinder 11 in that not shown hinged storage is stored, and the machine is ready for use.
  • the clamping mechanism 18 of FIG. 6 shows a first embodiment of the clamping mechanism 18 of the present invention in a closed state.
  • the clamping mechanism 18 of FIG. 6 includes one immovable jaw or jaw 30 on which a movable jaw or jaw 31 is attached. Between the stationary jaw 30 and the movable jaw 31 is an inflatable bladder or by a fluid such as e.g. B. compressed air, expandable hose 32 mounted. The inside of the bladder 32 is with a blowing air duct 33 located in the immovable clamping jaw 30 for Expand the bladder 32 connected, which ends in a blown air nozzle 34.
  • the Blowing air connector 34 has a conventional valve (not shown) that prevents that fluid escapes from the inflatable bladder 32 unless it is manually operated (such as the type of valve used on car tires).
  • the ends 14, 15 of the Plate 13 is inserted into axial slot 12 when inflatable bladder 32 is in is in an unexpanded or collapsed state and is moving Clamping jaw 31 has moved so far away from the immovable clamping jaw 30 that the axial slot 12 is relatively wide.
  • a source of compressed air is connected to the nozzle 34 of the blow duct, so that compressed air expands the inflatable bladder 32, causing the moveable Clamping jaw 31 is pushed in the direction of the ends 14, 15 of the plate 13 and the Plate ends 14, 15 between the movable and the immovable clamping jaw 31, 30 are clamped.
  • FIG. 7 and 7a show a cross-sectional view of a second embodiment the clamping mechanism 18 of the present invention.
  • the clamping mechanism 18 includes Clamping jaws or clamping jaws 35, 36, which are pivoted around a pivot 37 are pivotable.
  • a spring 38 is provided, one on the pivot pin 37 mounted coil spring or any conventional spring can be around the Preload jaws 35, 36 so that they move towards each other.
  • the one Clamping jaw 35 has an expansion hole 39, and on the other clamping jaw 36 there is one U-shaped expansion pin 40 attached, which is in an expansion hole 42 of the Clamping jaw 36 rotates.
  • Fig. 7 shows an end view and Fig. 7a a side view of the Spreader pin 40.
  • the clamping mechanism 8 and 8a show a third embodiment of the clamping mechanism 18 of the 8, the clamping mechanism 18 in a closed State and FIG. 8a shows this in an open state.
  • the clamping mechanism 8 and 8a includes an immovable jaw 43 and a movable one Jaw 44 which is slidably mounted in the immovable jaw 43.
  • a cam lever 45 is on the immovable by means of a pivot pin 46 Jaw 43 rotatably mounted.
  • the cam lever 45 includes one Actuating shaft 47 and a cam 48, which has a center point 49, too which the pivot 46 is arranged eccentrically.
  • the control curve 48 runs in a groove 50 located in the movable jaw 44.
  • the cam lever 45 is from a closed state (Fig. 8) to an open state (Fig.
  • FIG Clamping mechanism 18 is of a general nature and can, for example, be one of those shown in FIGS 6 to 8a shown clamping mechanisms 18.
  • the clamping mechanism 18 After the clamping mechanism 18 is inserted into the axial slot 21, it must be ensured that the upper Surface 51 of the clamping mechanism 18 with the outer surface 52 of the plate cylinder 11 is concentric. To meet this requirement, shims or shims 53 inserted between the bottom of the axial slot 21 and the clamping mechanism 18 become.
  • the bottom of the axial slot 21 can be adjustable in the Way that it can be moved radially to the radial position of the upper surface 51st of the clamping mechanism 18 to adjust.
  • FIG. 10 shows a mechanism for attaching a clamping mechanism 18 on the Outer surface 52 of the plate cylinder 11.
  • FIG. 10 illustrates a cross-sectional view of the Gap 19 represents.
  • an air motor 54 is attached by the one set screw 55 protruding into the axial slot 21 of the plate cylinder 11 is rotated.
  • the air motor 54 is connected to a channel 56 and this is with a compressed air source is connected.
  • the set screw 55 rotates when the Air motor 54 compressed air is supplied.
  • any other drive e.g. an electric motor, etc. used become.
  • the clamping mechanism 18 has a screw thread Adjustment opening 57, in the thread of which the adjusting screw 55 engages. To apply the pressure plate 13 on the plate cylinder, the clamping mechanism 18 as far as in the axial slot 21 inserted until the adjusting screw 55 and the adjustment opening 57 cursed with each other. Then the air motor 54 is activated to the set screw 55 in screw the adjustment opening 57 in, the clamping mechanism 18 against the corresponding side wall of the axial slot 18, e.g. to the side or down pulled and fixed in the axial slot 21 and thereby the plate 13 on the Plate cylinder 11 is attached.
  • FIG. 11 shows another embodiment for attaching the pressure plate 13 on the Outer surface 52 of the plate cylinder 11.
  • FIG. 11 is a cross-sectional view of the Gap 19.
  • Inside the plate cylinder 11 is an air motor 54 ', which in with respect to the radius of the plate cylinder 11 an inclined at an angle ⁇ arranged, protruding into the axial slot 21 setscrew 55 'rotates.
  • the Angle ⁇ is less than 90 ° and is preferably in a range of 10 ° -15 °.
  • the air motor 54 ' is connected to a channel, not shown, and this is with connected to a compressed air source. When compressed air is supplied to the air motor 54 ' the adjusting screw 55 'turns.
  • the clamping mechanism 18 has an adjustment opening 57 ' with screw thread, in which the adjusting screw 55 'engages. To apply the Pressure plate 13, the clamping mechanism 18 so far in the axial slot 21st inserted until the adjusting screw 55 'is aligned with the adjusting opening 57'. Then it will be the air motor 54 'activates the set screw 55' into the setting opening 57 ' screw in, whereby the clamping mechanism 18 fixed in the axial slot 21 and thus the plate 13 is attached to the plate cylinder 11. It is understood that the 10 and 11, along with each of those shown here Designs of clamping mechanisms can be used, but especially with the differently designed clamping mechanisms described below.
  • Fig. 12 shows an embodiment of a mechanism for securing a Clamping mechanism 18 in the axial slot 21.
  • the plate cylinder 11 comprises one Cam mechanism 58 which is adjacent to or near the axial slot 21 on the Cylinder 11 is attached.
  • the clamping mechanism 18 has a longitudinal slot 59, in a part of the cam mechanism 58 fits when the clamping mechanism 18 in the axial slot 21 is inserted.
  • the cam mechanism 58 is attached so that this rotates in the plate cylinder about an axis 60 which is at a distance from the center 61 of the cam mechanism 58.
  • the cam mechanism 58 may include a lever 62 to move the cam mechanism from a closed in to turn an open position.
  • cam mechanism 58 is rotated to an open position and the clamping mechanism 18 inserted into the axial slot 21. Then the Cam mechanism 58 in its locked position or closed position rotated, which causes it to be moved into the slot 59, the Clamping mechanism 18 presses against the opposite wall of the slot 21 and thus secures it in slot 21.
  • the clamping mechanism 18 shown in FIG. 12 can corresponding to each of the embodiments described here above or below be trained.
  • FIG. 13 shows an alternative embodiment of the clamping mechanism 18 of FIG present invention.
  • the clamping mechanism 18 of FIG. 13 can be any of the embodiments described here above or below. He however, includes sides 63, 64 which are inclined radially inwards, or a conical, have converging shape toward the center of the cylinder 11.
  • the axial slot 21 has equally inclined or conical walls.
  • the one shown in Fig. 13 Embodiment of a clamping mechanism 18 according to the invention is advantageous Way in connection with one of the fastening and / or described above or below and / or security mechanisms used.
  • Fig. 14 shows an alternative embodiment, in which the sides 65, 66 in the radial direction internally directed direction are tapered or inclined and the axial slot 21 has equally inclined or conically shaped walls.
  • the fastening and / or Securing mechanism preferably according to one of the before or after described types trained.
  • FIG. 15 shows a further alternative embodiment with a clamping mechanism 18 which an outwardly conical or inclined shaped side wall 67 and one in essentially radially extending side wall 68.
  • FIGS. 7 and 7a show further embodiments of the clamping mechanism 18 of the present invention, the same as the embodiments of FIGS. 7 and 7a, because they comprise jaws 35 ', 36' which move relative to each other and which Clamp ends 14, 15 of pressure plate 13 together.
  • It is a spring 38 ' the one between the jaws 35 ', 36' mounted coil spring may be provided to to bias the jaws 35 ', 36' against each other such that they move towards each other.
  • the jaws have expansion holes 39 ', in which at Inserting the ends 14, 15 of the pressure plate 13 into the axial slot 12 is not shown U-shaped spreader pin is inserted.
  • the expansion pin is removed from the expansion holes 39 ', and by the bias of the spring 38 'the jaws 35', 36 'to the Plate ends 14, 15 and pressed against each other, so that the plate 13 with their Ends 14, 15 is clamped between the jaws 35 ', 36'.
  • the Clamping mechanism 18 inserted into the axial slot of the plate cylinder 11.
  • the Clamping jaws 35 ', 36' have side walls which point towards the center of the cylinder 11 are inclined or tapered apart. Between the jaws 35 ', 36 'a safety mechanism is attached which has a cam mechanism 69 includes.
  • FIG. 17 shows one alternative embodiment of a security mechanism according to the invention, which essentially coincides with the embodiment shown in FIG. 16, in which however, the spreading of the jaws 35 ', 36' by means of a rotating mechanism 70 and one in associated bores of the jaws 35 ', 36' extending lateral screw 71 takes place.
  • the rotating mechanism 70 can for example with the help of an Allen key via one on the rotating mechanism 70
  • Shaped inner hexagon head in the clamping mechanism 18 can be rotated, and has a helical thread section, not shown in FIG. 17, which is arranged at the level of the lateral screw 71.
  • the lateral screw 71 has one first thread section in the form of a right-hand thread, which z. B. in a associated threaded hole is screwed into the first jaw 35 '; and points at the opposite end a thread section with opposite pitch - in in this case a left-hand thread - which fits into a corresponding associated Left-hand threaded hole is screwed into the opposite jaw 36 '.
  • the lateral has Screw 71 is indicated by horizontal lines in FIG. 17 gear-shaped section on which with the helical section of the Rotating mechanism 70 cooperates, and depending on the direction of rotation of the Rotation mechanism 70 the lateral screw 71 in one or the other direction is rotated and thereby the jaws 35 ', 36' spread apart or contracts.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Claims (18)

  1. Dispositif destiné au maintien d'une plaque ou forme d'impression sur un cylindre porte-plaque à fente axiale d'une rotative d'impression, comprenant un mécanisme de serrage comportant au moins un mors de serrage mobile pouvant être déplacé d'un état fermé à un état ouvert,
    caractérisé
    en ce que le mécanisme de serrage (18) serre ensemble les extrémités (14, 15) de la plaque ou forme d'impression (13), à l'état fermé du mors de serrage (31, 35, 35', 44), et en ce que le mécanisme de serrage (18) est disposé de manière extractible dans la fente axiale (21), et relie ensemble les extrémités (14, 15) de la plaque ou forme d'impression (13), avant que le mécanisme de serrage (18) soit inséré dans la fente axiale (21) du cylindre porte-plaque (11).
  2. Dispositif selon la revendication 1, caractérisé en ce que le mécanisme de serrage (18), dans une direction vue radialement relativement au centre du cylindre 11, présente une ou plusieurs faces (65, 66, 67) s'étendant de manière inclinée ou conique, qui s'appuient sur des parois latérales de forme correspondante, de la fente axiale (21).
  3. Dispositif selon la revendication 2, caractérisé en ce que les faces (65, 66) du mécanisme de serrage (18) s'étendent de manière à s'évaser l'une par rapport à l'autre en direction du centre du cylindre (11).
  4. Dispositif selon la revendication 2, caractérisé en ce que les faces (63, 64) du mécanisme de serrage (18) s'étendent de manière à se rapprocher en direction du centre du cylindre (11).
  5. Dispositif selon l'une des revendications précédentes, caractérisé en ce que par ailleurs, il est prévu un montant de support (20) pour le mécanisme de serrage (18), qui supporte en le maintenant, le mécanisme de serrage (18) avant l'insertion de ce dernier dans la fente axiale (21) du cylindre porte-plaque (11), pendant la réunification des extrémités (14, 15) de la plaque ou forme d'impression (13).
  6. Dispositif selon l'une des revendications précédentes, caractérisé en ce que la surface extérieure du cylindre porte-plaque (11) présente un grand nombre d'ouvertures à fluide (22) qui peuvent être reliées à une source de fluide (24), notamment une source d'air comprimé.
  7. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le mécanisme de serrage (18) comprend un premier mors de serrage (30, 43) ainsi qu'un second mors de serrage (31, 44) mobile par rapport au premier mors de serrage (30, 43).
  8. Dispositif selon la revendication 7, caractérisé en ce que le premier et le second mors de serrage (30, 43; 31, 44) peuvent être pressés l'un contre l'autre par l'intermédiaire d'un soufflet expansible (32), en vue de relier les extrémités (14, 15) de la plaque ou forme d'impression (13).
  9. Dispositif selon la revendication 7 ou 8, caractérisé en ce que le premier et le second mors de serrage (30, 43; 31, 44) sont réalisés de manière à pouvoir pivoter l'un vers l'autre, par l'intermédiaire d'un tourillon de rotation (37).
  10. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le mécanisme de serrage (18) comprend un levier de came (45) et une came de commande (48), à l'aide desquels le premier et le second mors de serrage (30, 43; 31, 44) peuvent être déplacés d'une position de verrouillage dans une position d'ouverture.
  11. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le mécanisme de serrage (18) comprend un mécanisme d'expansion (69, 70, 71), par lequel le premier et le second mors de serrage (30, 43; 31, 44), après insertion du mécanisme de serrage (18) dans la fente axiale (21) du cylindre porte-plaque (11), sont écartés en vue de fixer le mécanisme de serrage (18) dans la fente axiale (21).
  12. Dispositif selon la revendication 11, caractérisé en ce que le mécanisme d'expansion comprend un mécanisme à came (69), qui est disposé entre le premier et le second mors de serrage (35', 36').
  13. Dispositif selon la revendication 11, caractérisé en ce que le mécanisme d'expansion comprend un mécanisme de rotation axial (70), ainsi qu'une vis latérale (71) susceptible d'être vissée dans des trous taraudés correspondants, de pas opposés, le mécanisme de rotation (70), lors de sa rotation, faisant tourner la vis latérale (71) par l'intermédiaire d'une transmission du type à vis sans fin.
  14. Dispositif selon l'une des revendications précédentes, caractérisé en ce qu'il est prévu un mécanisme de fixation (54, 54', 55, 55', 56) destiné à fixer le mécanisme de serrage (18) dans la fente axiale (21) du cylindre porte-plaque (11).
  15. Procédé de mise en place d'une plaque ou forme d'impression plane sur un cylindre porte-plaque à fente axiale d'une rotative d'impression,
    caractérisé par les étapes de procédé suivantes :
    pliage des extrémités de la plaque ou forme d'impression sensiblement plane,
    transformation de la plaque ou forme d'impression sensiblement plane en une forme sensiblement cylindrique, de façon telle que les extrémités pliées de la plaque ou forme d'impression soient réunies,
    réalisation de la liaison des extrémités pliées de la plaque ou forme d'impression, à l'aide d'un mécanisme de serrage pouvant être inséré dans la fente axiale du cylindre porte-plaque,
       montage par coulissement de la plaque ou forme
    d'impression, en commun avec le mécanisme de serrage, sur le cylindre porte-plaque de la rotative d'impression.
  16. Procédé selon la revendication 15, caractérisé en ce que durant le montage par coulissement de la plaque ou forme d'impression avec le mécanisme de serrage sur le cylindre porte-plaque, le diamètre intérieur de la plaque ou forme d'impression cylindrique, est dilaté à l'aide d'air comprimé sortant d'un grand nombre d'ouvertures à fluide dans la surface périphérique du cylindre porte-plaque.
  17. Procédé selon l'une des revendications 15 et 16, caractérisé en ce que le mécanisme de serrage est supporté et maintenu par un montant de support, pendant la réalisation de la liaison des extrémités de la plaque ou forme d'impression.
  18. Procédé selon l'une des revendications 15 à 17, caractérisé en ce que le mécanisme de serrage, après sont montage coulissant, en commun avec la plaque ou forme d'impression, sur le cylindre porte-plaque, est fixé au cylindre porte-plaque.
EP98100795A 1997-02-14 1998-01-19 Cylindre porte-plaque avec un mécanisme de serrage insérable et son procédé d'utilisation Expired - Lifetime EP0858890B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US813608 1997-02-14
US08/813,608 US5921183A (en) 1997-02-14 1997-02-14 Narrow gap plate with insertable lock-up mechanism, and method of using the same

Publications (2)

Publication Number Publication Date
EP0858890A1 EP0858890A1 (fr) 1998-08-19
EP0858890B1 true EP0858890B1 (fr) 2000-04-19

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US (1) US5921183A (fr)
EP (1) EP0858890B1 (fr)
DE (2) DE59800125D1 (fr)

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EP0858890A1 (fr) 1998-08-19
US5921183A (en) 1999-07-13
DE19801689A1 (de) 1998-08-20

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