EP0483535A1 - 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
EP0483535A1
EP0483535A1 EP91116813A EP91116813A EP0483535A1 EP 0483535 A1 EP0483535 A1 EP 0483535A1 EP 91116813 A EP91116813 A EP 91116813A EP 91116813 A EP91116813 A EP 91116813A EP 0483535 A1 EP0483535 A1 EP 0483535A1
Authority
EP
European Patent Office
Prior art keywords
clamping
clamping device
elevator
cylinder
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.)
Granted
Application number
EP91116813A
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German (de)
English (en)
Other versions
EP0483535B1 (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
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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 device for fastening elevators on sheet-guiding cylinders in rotary printing presses.
  • JP-OS Sho 63-92743 and JP-OS Sho 63-145032 a rod-shaped curve which extends over the entire cylinder length between the gripper support bar and the cylinder body and which clamp an elevator between the gripper support bar and the rod-shaped curve. Because when turning the rod-shaped curve If a clamping force decreases from the point of introduction of the torque over the entire width of the machine due to torsion from a machine side, a uniform course of the clamping force over the cylinder length is not guaranteed.
  • the object is achieved in that a plurality of clamping elements are arranged on actuating rods movable in the axial direction, which are prestressed by springs and actuating clamping strips when the actuating rods move axially.
  • 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 adjusting rod, which have a wedge-shaped clamping surface, are prestressed between stops by spring force and actuate a clamping strip with pins when the adjusting rod moves axially.
  • the advantage lies in the use of the wedge effect. Only a small axial force is required to apply a high clamping force.
  • the spring preload of the clamping bodies causes the clamping surfaces to rest against the pins with further axial movement of the adjusting rod, the spring force acts as a uniform clamping force.
  • 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 advantage of this is the extremely small space requirement of this clamping device. During the adjustment, 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 that 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 operated 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.
  • 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. 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, since then the elevator no longer has to be held.
  • toggle levers are supported on the cylinder via a rolling element.
  • the compact design of this clamping device is advantageous, as is the fast execution of the clamping function, since only slight displacements of the parts are required.
  • embodiments of clamping elements are shown that can be used when moving an actuating rod.
  • Another principle of the clamping which meets the task to be solved, provides that a high coefficient of friction is generated between the end of a thin elevator and the gripper support bar by means of rotatable adjusting elements. It is advantageous that the required clamping force can be reduced and component tolerances can be compensated for by suitable material selection.
  • a favorable embodiment provides that several cams are arranged side by side on a gripper shaft with bearings, a curve section is formed in the area between the snap-in positions, which actuates a pressure piece that is preloaded via disc springs, and that the pressure piece moves a bolt with a stop, which a terminal block moves.
  • the cams which can be rotated in a simple manner, the clamping force generated is no longer dependent on the operator.
  • 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 given by the fact that two profile bars arranged in a longitudinal groove on the front edge of the cylinder and a detachably fastened intermediate layer, which have different coefficients of friction on the front and rear, clamp a thin elevator.
  • the advantageous properties of this embodiment are that no force is exerted on the gripper support bar during clamping. This maintains the accuracy of the gripper setting. To avoid excessive twisting of the profile bars, they are divided in the middle. This ensures an even clamping force curve. A relative movement between the elevator and the profile bar is prevented by a thin sheet which lies between the elevator and the profile bar.
  • the different coefficients of friction on the intermediate layer sides enable high holding force on the one hand and ease of use on the other.
  • 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.
  • the small space requirement of this embodiment and the clamping properties which can be predetermined with the choice of material for the elastic clamping elements are advantageous here.
  • configurations of the elastic clamping elements are listed. These can be designed as screw-on leaf springs, in the form of a prestressed spring bar or several spring elements side by side, secured by pins, embedded in a round bar.
  • a round cord received by a longitudinal groove - either extending over the entire length or consisting of several short cords - serves as an elastic element, and a hose that can be acted upon with a pressure medium can also be provided. With the latter hose can be pneumatically actuated by a clamping device, which allows integration into the remote control of the machine.
  • a shaft receives an eccentrically mounted terminal block, which is deflected from the central position in the slot at the beginning of the rotation and that the terminal block is moved perpendicular to the thin elevator after the terminal block has been placed against the stop.
  • 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 time. 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.
  • Fig. 1 shows an axially displaceable adjusting rod 1, which has a plurality of clamping bodies 2.
  • the clamping bodies 2 have a wedge-shaped clamping surface 3 on the side and are biased against a stop 4 by a spring 5. If the actuating rod 1 is shifted 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 clamp 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. The guide pins 11 are locked in the gripper support bar 8 by means of locking rings 13.
  • 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 terminal block 7 and Gripper pad 8 before, 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 of all, 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 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 force required for clamping between the clamping bar 7 and the gripper support bar 8 is applied by the spring 5.
  • 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 control rod 1 in bearings 10 on the guide pin 11 and the leadership of the terminal block 7 by the guide pin 11 avoid any deformation of the Gripper support bar 8 - a decisive advantage when transporting sheets in the printing press.
  • spring-loaded clamping elements 16 are shown.
  • the clamping elements 16, which are designed here as spring-loaded toggle levers, are installed in a relaxed state at an inclination of approximately 30 °, based on the surface normal, built 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 during the displacement of the actuating rod 15 on the cylinder 32.
  • the clamping bar 7a which is connected to the toggle lever 22 by a bolt 21, is moved toward 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 bar 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 emerge.
  • FIG. 5 shows an eccentric 38 which is moved in the axial direction by moving a rod by a few millimeters.
  • the eccentric rolls against a recess in a cylinder and causes the eccentric bearing Bolzens moving a terminal block onto a gripper support bar.
  • the tensioning element is designed as a roller lever 37.
  • the rolling surface of the roller lever can be designed as a contour, for example an Archimedean spiral.
  • the roller levers 37 are rotated about a bolt. The different radius resulting from the contour formed on the roller lever 37 during the rotation of the roller lever 36 is used to move the terminal block.
  • FIGS. 5 and 6 The arrow drawn in FIGS. 5 and 6 is intended to denote the axial displacement.
  • FIG. 7 shows a clamping device which can be actuated manually by means of a plug pin.
  • a plurality of cams 26 are provided side by side 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. 8 shows a clamping device in which two profile bars 41 are received in a longitudinal groove 39 on the front edge 40 of the cylinder.
  • the profile bars 41 are rotated to clamp a thin elevator 14, the profile bars 41 are supported on a projection of the cylinder 32.
  • the gripper support bar 34 can therefore not be deformed by the action of force.
  • In the contact area between thin elevator 14 and profile bars 41 is one Liner 42 arranged.
  • the front and back of the intermediate layer 42 have different rubbing properties.
  • a low torque when actuating the profile bars 41 can be achieved by a low coefficient of friction on the side of the intermediate layer 42 facing the profile bars 41. This enables easy usability.
  • a high coefficient of friction on the side of the intermediate layer 42, which is in contact with the elevator 14, can achieve a high coefficient of friction between these friction partners. This enables a reduction of the clamping forces with the same required holding force.
  • the intermediate layer 42 is detachably fastened to the gripper support bar 34 by screws 36.
  • FIG. 9 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 45.
  • the torque required when rotating the round rod 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.
  • a leaf spring 46 is shown, which is attached to the circumference of a round rod 43.
  • Fig. 9b shows a spring-loaded spring bar 47 which, secured by pins 48, is movably held in the round bar.
  • a spring ensures the pretension of the female connector 47.
  • Several short female connectors can also be arranged next to one another, or several springs can be used, depending on the desired pretension.
  • 9c shows a round cord 49 which is received in the longitudinal groove 44.
  • FIG. 9d 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 onto 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 for increasing the friction coefficients in the Contact area between elevator 14 and Gripper pad 34 can be provided.
  • 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 adjusted so that individual segments, which then contain resilient elements, clamp earlier than others.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Coating Apparatus (AREA)
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
DE4034494A DE4034494C1 (fr) 1990-10-30 1990-10-30
DE4034494 1990-10-30

Publications (2)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2782946A1 (fr) * 1998-09-08 2000-03-10 Heidelberger Druckmasch Ag Dispositif telecommande de serrage et de traction monte sur un cylindre de groupe d'impression

Families Citing this family (6)

* 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
CH691452A5 (de) * 1995-05-05 2001-07-31 Koenig & Bauer Ag Vorrichtung zum Befestigen einer Gummitucheinheit auf einem Gummizylinder.
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

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3217644A (en) * 1962-03-30 1965-11-16 Mosstype Corp Clamping means for mounting carrier sheets on flat or round surfaces
US3408933A (en) * 1966-03-24 1968-11-05 Miehle Goss Dexter Inc Continuous take-up clamping arrangement for blanket in printing press
GB1148014A (en) * 1966-03-21 1969-04-10 Miehle Goss Dexter Inc 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
EP0167861A2 (fr) * 1984-07-12 1986-01-15 Victor Company Of Japan, Limited Dispositif pour pincer et relâcher des feuilles

Family Cites Families (11)

* 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
JPS55138535U (fr) * 1979-03-26 1980-10-02
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

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3217644A (en) * 1962-03-30 1965-11-16 Mosstype Corp Clamping means for mounting carrier sheets on flat or round surfaces
GB1148014A (en) * 1966-03-21 1969-04-10 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
EP0167861A2 (fr) * 1984-07-12 1986-01-15 Victor Company Of Japan, Limited Dispositif pour pincer et relâcher des feuilles

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 12, no. 400 (M-756)(3247) 24. Oktober 1988 & JP-A-63 145 032 ( KOMORI PRINTING MACH. CO. LTD ) 17. Juni 1988 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2782946A1 (fr) * 1998-09-08 2000-03-10 Heidelberger Druckmasch Ag Dispositif telecommande de serrage et de traction monte sur un cylindre de groupe d'impression

Also Published As

Publication number Publication date
JPH04265749A (ja) 1992-09-21
EP0483535B1 (fr) 1996-04-24
DE4034494C1 (fr) 1992-03-05
JP2970968B2 (ja) 1999-11-02
DE59107718D1 (de) 1996-05-30

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