EP0483535B1 - Dispositif de serrage pour fixer de fins revêtements sur des cylindres transportant des feuilles dans des rotatives d'impression pour feuilles - Google Patents

Dispositif de serrage pour fixer de fins revêtements sur des cylindres transportant des feuilles dans des rotatives d'impression pour feuilles Download PDF

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Publication number
EP0483535B1
EP0483535B1 EP91116813A EP91116813A EP0483535B1 EP 0483535 B1 EP0483535 B1 EP 0483535B1 EP 91116813 A EP91116813 A EP 91116813A EP 91116813 A EP91116813 A EP 91116813A EP 0483535 B1 EP0483535 B1 EP 0483535B1
Authority
EP
European Patent Office
Prior art keywords
clamping
clamping device
dressing
strip
gripper
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
EP91116813A
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German (de)
English (en)
Other versions
EP0483535A1 (fr
Inventor
Rudi Haupenthal
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
Original Assignee
Heidelberger 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 Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0483535A1 publication Critical patent/EP0483535A1/fr
Application granted granted Critical
Publication of EP0483535B1 publication Critical patent/EP0483535B1/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
    • B41F27/1262—Devices for attaching printing elements or formes to supports for attaching flexible printing formes without tensioning means
    • 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 clamping device for fastening thin lifts on sheet-guiding cylinders of a sheet-fed rotary printing press, the cylinders having an axially extending cylinder pit in which the beginning and end of the elevator are received.
  • EP 0 167 861 A shows a gripper device for transporting sheet material to be printed.
  • the individual grippers are opened via an axially movable rod and a slope against the force of compression springs.
  • the grippers are closed using compression springs that are assigned to each gripper.
  • US 3,408,933 shows a cylinder in which there are no gripper systems and no gripper support bar.
  • GB 11 48 014 discloses a cylinder in which spring elements are actuated via a rotatable rod to tension an elevator.
  • the object is achieved in that a plurality of clamping elements are arranged on actuating rods movable in the axial direction, which are biased by springs and actuate terminal strips.
  • An advantage of the subject matter of the invention is the actuation of all clamping elements with one adjusting means. Even small axial displacements of the adjusting rods generate such a high clamping force that elevators can be reliably fixed.
  • An advantageous embodiment consists in that a plurality of clamping bodies are arranged on an actuating rod, which have a wedge-shaped clamping surface, are prestressed between stops by spring force and actuate a clamping strip when the actuating rod is moved axially via pins.
  • the advantage lies in the use of the wedge effect. Only a small axial force is required to apply a high clamping force Force required.
  • the spring preloading of the clamping bodies causes the spring force to act as a uniform clamping force after the clamping surfaces rest against the pins with further axial movement of the actuating rod.
  • the storage of the actuating rod within a closed system causes a considerably reduced force to act against the gripper support bar, which cannot deform it.
  • Another advantageous embodiment is that several toggle levers are supported in an actuating rod, which are supported against a cylinder and a terminal strip clamps a thin elevator when the actuating rod is axially displaced.
  • the extremely small space requirement of this clamping device is advantageous here.
  • slight axial displacements of the control rod are sufficient to generate sufficiently high clamping forces.
  • the maintenance of the clamping force is ensured by springs, which are supported on drivers.
  • the main advantage of the springs is a force that is always defined by tolerances and is not affected by the operator.
  • the adjusting rods can be actuated manually via an adjusting head provided on an end face of a cylinder, which allows simple operation.
  • the control rods can also be moved remotely in the axial direction. This enables the inclusion of the clamping devices for cylinder elevators in the machine remote control.
  • the sequence of the actuation of the clamping points can be set by differently selectable distances between stops and pins / bolts.
  • the elevator can be tensioned evenly from the inside out, which greatly benefits the lifespan of the elevator and the precision of the sheet transfer. If necessary, you can also clamp in progressively from the outside in. So For example, the two outer clamping points can hold the elevator with little force. This allows alignment on the cylinder in the axial direction and radially on the front edge. This simplifies e.g. B. the underlay on transfer cylinders, because then the elevator no longer has to be held.
  • toggle levers are supported on the cylinder via a rolling element.
  • a favorable embodiment provides that a plurality of rotatable cams are arranged side by side on a gripper shaft with bearings, a cam section is formed in the area between the snap-in positions, which actuates a pressure piece which is preloaded via disc springs, and that the pressure piece moves a bolt with a stop, which moves a terminal block.
  • Another advantage is that when a thin elevator is clamped, the gripper support bar is not loaded by the clamping force during printing. This ensures that the gripper position is maintained once it has been set.
  • Another embodiment is characterized in that round rods are arranged in the cylinder, which receive one or more elastic clamping elements in a longitudinal groove, which clamp a thin elevator against a gripper support bar.
  • a further advantageous embodiment of the invention provides that round bars receive eccentrically mounted terminal strips, which is deflected from the central position in the slot at the beginning of the rotation and that after the terminal strip is placed against the stop, the terminal strip is moved perpendicular to the thin elevator.
  • This version offers several advantages. Rotation of the shaft until the terminal strip is applied enables the position of the elevator to be corrected at this point. The further rotation of the shaft means that the eccentrically mounted terminal block is only moved perpendicular to the elevator. Since there is no relative movement, the elevator remains in its position. In this way, high clamping forces can be achieved.
  • the clamping bodies 2 have a wedge-shaped clamping surface 3 on the side and are prestressed against a stop 4 by means of a spring 5. If the actuating rod 1 is moved to the left in the axial direction, the clamping bodies 2 with their laterally formed wedge-shaped clamping surfaces 3 are pressed against the pins 6 fixed in the clamping bar 7 and thereby push the clamping bar 7 against a gripper support bar 8.
  • the clamping bar can be used other bodies can also be provided which have an inclined plane on which the clamping bodies 2 act.
  • a plurality of return springs 9 are embedded in the gripper support bar 8 and move the clamping bar 7 back into its starting position when the clamping is released against stops on the guide pin 11.
  • a plurality of guide bolts 11 are provided in the gripper support bar 8, each of which has a bearing 10 in which the actuating rod 1 is received. With circlips 13 the guide bolts 11 are locked in the gripper support bar 8.
  • FIG. 2 and 3 show an actuating rod 1 in the starting or operating position.
  • a clamping body 2 is prestressed between two stops 4 by a spring 5. In this position there is a gap between the clamping bar 7 and the gripper support bar 8, so that a thin elevator 14 is easy to thread.
  • the control rod is moved a small distance in the axial direction.
  • the clamping can essentially be divided into three sections. First, there is an idle stroke of the actuating rod 1 without moving the terminal block 7. This is followed by a clamping stroke, which causes the elevator 14 with the clamping bar 7 to be turned against the gripper support bar 8. An overstroke then takes place, which ensures that the clamping bodies 2 no longer abut stops 4. This ensures a defined clamping force dependent on springs 5 and the clamping angle.
  • the clamping bodies 2, on which the wedge-shaped clamping surfaces 3 can be designed, for example, at an angle of 20 °, now act on them via pins 6 fixed in the clamping strip 7.
  • the adjustable parts cover only short adjustment paths in order to reach the position outlined in FIG. 3.
  • the elevator 14 is clamped without play.
  • the force required for clamping between the clamping bar 7 and the gripper support bar 8 is applied by the spring 5.
  • the right stop 4 supporting spring 5 presses the wedge-shaped clamping surfaces 3 against the pin 6, which acts on the terminal block 7.
  • the amount of the clamping force can be adjusted via the axial position of the stops 4 on the adjusting rod 1 depending on the spring characteristics of the springs 5 or spring assemblies used.
  • the storage of the actuating rod 1 in bearings 10 on the guide pins 11 and the guidance of the clamping bar 7 by the guide pins 11 prevent any deformation of the gripper support bar 8 - a decisive advantage when transporting sheets in the printing press.
  • the clamping elements 16 which are designed here as spring-loaded toggle levers, are installed in the relaxed state at an inclination of approximately 30 °, based on the surface normal, erected on the gripper support bar 8. Axial movement of the actuating rod 15 pushes the catches or stops 18 springs 5 or spring assemblies together, so that the clamping elements 16 are deflected out of their position.
  • the rolling elements 20 support the clamping elements 16 on the cylinder 32 during the displacement of the actuating rod 15.
  • the clamping bar 7a which is connected to the toggle lever 22 by a bolt 21, is moved towards the gripper support bar 8.
  • springs 5 or spring assemblies are used to generate the clamping force. Since the clamping elements 16 are in the clamped position at an angle of approximately 15 °, inclined to the surface normal, on the gripper support strip 8, guide elements 19 are provided which absorb the axial forces occurring due to the inclined position of the clamping elements 16.
  • FIG. 4b shows a side view of the spring-loaded clamping elements 16, from which the profile of the actuating rod 15 used and the position of the return springs 9 are shown.
  • FIG. 5 shows a clamping device which can be actuated manually via a plug pin.
  • a plurality of cams 26 are provided next to one another on a gripper shaft 24 with bearings 25. Snap positions 27 and 28 are attached to the circumference of the cams 26. Between the locking positions 27, 28, a curve section 29 is formed as a thickening.
  • the cams 26 are rotated in the direction of the arrow with the aid of a plug pin.
  • the plate springs 55 which generate the clamping force are pressed together by the pin guided in the gripper support bar 34 with a stop 31 and thus release the clamping bar 33.
  • FIG. 6 shows a clamping device in which a round cord 49 is inserted in a longitudinal groove 44 of a round rod 43 as an elastic clamping element.
  • the torque required when rotating the round bar 43 is reduced in that the friction coefficient in the contact area between the elevator 14 and the round cord 49 is reduced by a covering 56.
  • a high holding force is achieved by a high coefficient of friction between the gripper support bar 34 and the elevator 14.
  • Polyurethane or roughened surfaces are used as linings 57 with a high coefficient of friction.
  • FIGS. 7a, b, and c embodiments of elastic clamping elements are shown, such as z. B. can be used on round bars 43.
  • the elastic elements 49, 50 according to FIGS. 7b and 7c are received on round rods 43 in a longitudinal groove 44.
  • a leaf spring 46 is shown, which is attached to the circumference of a round rod 43.
  • FIG. 7c shows a round rod 43, in which a flexible hose 50 is embedded in a longitudinal groove 44.
  • This hose is connected to a pressure medium source and, depending on the pressurization, ensures a tight or less tight clamping of a thin elevator 14 onto a cylinder 32.
  • a clamping device with a rotatable shaft 51 is shown, in which the clamping bar 52 is mounted eccentrically.
  • the terminal strip is pressed against the upper edge of the slot 53 by means of springs 5.
  • the terminal strip 52 is deflected from the central position in the slot 53.
  • the shaft 51 rotates, the terminal strip 52 initially abuts the stop 54.
  • the position of the elevator 14 on the cylinder 32 can still be corrected. If the shaft 51 is rotated further, the terminal strip 52 can no longer be rotated because it abuts the stop 54.
  • the eccentric mounting of the terminal block 52 in the shaft 51 now causes the terminal block 52 to move perpendicular to the elevator 14 during further rotation. A relative movement of the elevator 14 no longer takes place.
  • linings 57 can be provided to increase the coefficients of friction in the contact area between elevator 14 and gripper support bar 34.
  • the clamping stroke can be adjusted by choosing the width of the slot 53 or the eccentricity.
  • the use of individual segments is also possible. With different eccentricity of individual clamping segments, the clamping can be set so that individual segments, which then contain resilient elements, clamp earlier than others.

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

Claims (13)

  1. Dispositif de serrage pour la fixation d'éléments minces de couverture (14) sur des cylindres (32) par des systèmes preneurs et une tringle de support de preneurs dans une machine rotative à imprimer des feuilles, les cylindres (32) comportant une fosse de cylindre orientée dans la direction de l'axe et dans laquelle le début de l'élément de couverture et la fin de l'élément de couverture sont logés,
       caractérisé
       en ce que plusieurs éléments de serrage (2, 16) disposés sur des barres de commande (1, 15) mobiles en direction axiale sont sous la précontrainte de ressorts (5) et actionnent des tringles de serrage (7, 7a) lors d'un mouvement axial des barres de commande (1, 15).
  2. Dispositif de serrage selon la revendication 1,
       caractérisé
       en ce que plusieurs corps de serrage (2) disposés sur une barre de commande (1) présentent une surface cunéiforme de serrage (3), sont soumis à la force de ressorts entre des butées (4) et actionnent une tringle de serrage (7) au moyen de broches (6) lors d'un mouvement axial de la barre de commande (1).
  3. Dispositif de serrage selon la revendication 1,
       caractérisé
       en ce que plusieurs leviers coudés (22) montés dans une barre de commande (15) prennent appui contre le cylindre (32) et une tringle de serrage (7a) bloque par serrage un élément mince de couverture (14) lors d'un déplacement axial de la barre de commande (15).
  4. Dispositif de serrage selon la revendication 1,
       caractérisé
       en ce qu'une tête de commande (12) prévue sur une surface extrême (35) d'un cylindre (32) est associée à la barre de commande (1, 15).
  5. Dispositif de serrage selon la revendication 1,
       caractérisé
       en ce que la barre de commande (1, 15) est déplaçable par télécommande en direction axiale.
  6. Dispositif de serrage selon la revendication 2,
       caractérisé
       en ce que la séquence de l'actionnement des lieux de serrage est réglable par différences des distances entre butées (4, 18) et broches (6), goujons (21).
  7. Dispositif de serrage selon la revendication 3,
       caractérisé
       en ce que les leviers coudés (22) prennent appui sur le cylindre (32) par un corps de roulement (20).
  8. Dispositif de serrage pour la fixation d'éléments minces de couverture (14) sur des cylindres (32) par des systèmes preneurs et une tringle de support de preneurs dans une machine rotative à imprimer des feuilles, les cylindres (32) comportant une fosse de cylindre orientée dans la direction de l'axe et dans laquelle la fin de l'élément de couverture et le début de l'élément de couverture sont logés,
       caractérisé
       en ce que plusieurs cames (26) pouvant subir une rotation sont juxtaposées sur un arbre de preneurs (24) équipé de coussinets (25), un segment de came (29) qui est réalisé sur les cames dans une zone comprise entre des positions d'encliquetage (27, 28) actionnant une pièce de poussée (30) qui est sous la précontrainte de ressorts Belleville (55) et en ce que la pièce de poussée (30) déplace un goujon comportant une butée (31) qui déplace une tringle de serrage (33).
  9. Dispositif de serrage pour la fixation d'éléments minces de couverture (14) sur des cylindres (32) par des systèmes preneurs et une tringle de support de preneurs dans une machine rotative à imprimer des feuilles, les cylindres (32) comportant une fosse de cylindre orientée dans la direction de l'axe et dans laquelle la fin de l'élément de couverture et le début de l'élément de couverture sont logés,
       caractérisé
       en ce que des barres rondes (43) pouvant subir une rotation et disposées dans le cylindre (32) logent un ou plusieurs éléments élastique de serrage qui serrent l'élément mince de couverture (14) contre une tringle (34) de support de preneurs.
  10. Dispositif de serrage selon la revendication 9,
       caractérisé
       en ce que les éléments élastiques de serrage sont constitués de lames de ressort (46) se montant par vissage.
  11. Dispositif de serrage selon la revendication 9,
       caractérisé
       en ce que les barres rondes (43) logent dans une rainure longitudinale (44) des éléments élastiques de serrage qui sont constitués de cordonnets (49) et en ce que des revêtements (56, 57) sont prévus entre élément de couverture (14) et tringle de support de preneurs (34) et/ou entre élément de couverture (14) et éléments de serrage.
  12. Dispositif de serrage selon la revendication 9,
       caractérisé
       en ce que l'élément élastique de serrage qui est prévu dans une barre ronde (43) est un flexible (50) pouvant recevoir des fluides sous pression.
  13. Dispositif de serrage selon la revendication 9,
       caractérisé
       en ce que les barres rondes (51) logent une ou plusieurs tringle(s) de serrage (52) montée(s) excentriquement et qui subit ou subissent au début de la rotation une déviation par rapport à la position centrale dans la fente (53) et
       en ce que après appui de la ou des tringle(s) de serrage (52) contre la butée (54), la ou les tringle(s) de serrage (52) est ou sont déplacée(s) perpendiculairement à l'élément mince de couverture (14).
EP91116813A 1990-10-30 1991-10-02 Dispositif de serrage pour fixer de fins revêtements sur des cylindres transportant des feuilles dans des rotatives d'impression pour feuilles Expired - Lifetime EP0483535B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4034494 1990-10-30
DE4034494A DE4034494C1 (fr) 1990-10-30 1990-10-30

Publications (2)

Publication Number Publication Date
EP0483535A1 EP0483535A1 (fr) 1992-05-06
EP0483535B1 true EP0483535B1 (fr) 1996-04-24

Family

ID=6417316

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91116813A Expired - Lifetime EP0483535B1 (fr) 1990-10-30 1991-10-02 Dispositif de serrage pour fixer de fins revêtements sur des cylindres transportant des feuilles dans des rotatives d'impression pour feuilles

Country Status (3)

Country Link
EP (1) EP0483535B1 (fr)
JP (1) JP2970968B2 (fr)
DE (2) DE4034494C1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4326251C2 (de) * 1993-08-05 1997-08-28 Koenig & Bauer Albert Ag Gummi-/Drucktuchzylinder
IT1282385B1 (it) * 1995-05-05 1998-03-20 Koenig & Bauer Albert Ag Dispositivo per fissaggio di una unita' di tessuto gommato su un cilindro di una macchina da stampa rotativa
FR2782946B1 (fr) * 1998-09-08 2002-04-12 Heidelberger Druckmasch Ag Dispositif telecommande de serrage et de traction monte sur un cylindre de groupe d'impression
DE20010395U1 (de) * 2000-06-09 2001-10-11 Heidelberger Druckmaschinen Ag, 69115 Heidelberg Zylinder mit einer Klemmeinrichtung in einer Druckmaschine
DE10324330A1 (de) * 2003-05-27 2004-12-30 Man Roland Druckmaschinen Ag Plattenzylinder einer Druckmaschine
EP2047994A1 (fr) * 2007-10-10 2009-04-15 WIFAG Maschinenfabrik AG Cylindre d'impression avec un canal de serrage pour une plaque d'impression
WO2010013318A1 (fr) * 2008-07-30 2010-02-04 株式会社 ゴス グラフィック システムズ ジャパン Dispositif de fixation d'un blanchet et procédé de fixation d'un blanchet

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2764936A (en) * 1953-05-29 1956-10-02 Harris Seybold Co Blanket clamps
US2837025A (en) * 1956-05-08 1958-06-03 American Can Co Clamping and tensioning device
US3217644A (en) * 1962-03-30 1965-11-16 Mosstype Corp Clamping means for mounting carrier sheets on flat or round surfaces
US3425348A (en) * 1966-03-21 1969-02-04 Miehle Goss Dexter Inc Clamping arrangement for blanket in printing press
US3408933A (en) * 1966-03-24 1968-11-05 Miehle Goss Dexter Inc Continuous take-up clamping arrangement for blanket in printing press
DE1561082A1 (de) * 1967-06-20 1970-04-16 Albert Schnellpressen Vorrichtung zum Einspannen des Druckzylinderaufzuges an Druckmaschinen
US3985074A (en) * 1972-05-23 1976-10-12 Roneo Vickers Limited Offset printing machines
JPS55138535U (fr) * 1979-03-26 1980-10-02
JPS6121169U (ja) * 1984-07-12 1986-02-07 日本ビクター株式会社 排紙機構
JPS62114736U (fr) * 1986-01-10 1987-07-21
DE3606351A1 (de) * 1986-02-27 1987-09-03 Heidelberger Druckmasch Ag Vorrichtung zum aufspannen von biegsamen druckplatten auf dem plattenzylinder von rotationsdruckmaschinen
JPH0444364Y2 (fr) * 1986-12-09 1992-10-20
JPS63145032A (ja) * 1986-12-09 1988-06-17 Komori Printing Mach Co Ltd 印刷胴のプレ−ト装着装置
DE3866063D1 (de) * 1987-08-25 1991-12-12 Heidelberger Druckmasch Ag Vorrichtung zum aufspannen von biegsamen druckplatten auf dem plattenzylinder von rotationsdruckmaschinen.
DE3813777A1 (de) * 1988-04-23 1989-11-02 Roland Man Druckmasch Spanneinrichtung zum befestigen einer biegsamen folie
DE3936458C1 (fr) * 1989-11-02 1991-04-11 Man Roland Druckmaschinen Ag, 6050 Offenbach, De
DE3936459C1 (fr) * 1989-11-02 1991-04-18 Man Roland Druckmaschinen Ag, 6050 Offenbach, De

Also Published As

Publication number Publication date
EP0483535A1 (fr) 1992-05-06
DE4034494C1 (fr) 1992-03-05
DE59107718D1 (de) 1996-05-30
JPH04265749A (ja) 1992-09-21
JP2970968B2 (ja) 1999-11-02

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