EP0110908A1 - Dispositif de mise sous tension d'un blanchet en caoutchouc. - Google Patents

Dispositif de mise sous tension d'un blanchet en caoutchouc.

Info

Publication number
EP0110908A1
EP0110908A1 EP19830901595 EP83901595A EP0110908A1 EP 0110908 A1 EP0110908 A1 EP 0110908A1 EP 19830901595 EP19830901595 EP 19830901595 EP 83901595 A EP83901595 A EP 83901595A EP 0110908 A1 EP0110908 A1 EP 0110908A1
Authority
EP
European Patent Office
Prior art keywords
tensioning
blanket
cylinder
reinforcement
shafts
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
EP19830901595
Other languages
German (de)
English (en)
Other versions
EP0110908B1 (fr
Inventor
Georg Herzan
Claus Simeth
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT83901595T priority Critical patent/ATE23485T1/de
Publication of EP0110908A1 publication Critical patent/EP0110908A1/fr
Application granted granted Critical
Publication of EP0110908B1 publication Critical patent/EP0110908B1/fr
Expired legal-status Critical Current

Links

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
    • B41F27/1293—Devices for filling up the cylinder gap; Devices for removing the filler
    • 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
    • B41F27/125—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 on a curvilinear path, e.g. by winding on a roll
    • 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 according to the preamble of patent claim 1.
  • Devices of this type are used to quickly and easily clamp printing blankets on a cylinder of a printing press, but especially blankets on the rubber cylinder of offset printing presses. It is particularly important to simplify operation and save time by changing the blanket without removing the cover of the cylinder channel and the blanket tension or releases in the tension or. Release movement of the tension shaft is integrated.
  • a device of this type is known and described in DE-PS 2 707 643.
  • the reinforcement of the printing blanket is inserted in the direction of a circular section in clamping spindles and held by locking elements.
  • the locking elements are designed as two-armed levers, extend over the entire length of the clamping spindles and are held by springs on one arm of the lever in a position that locks the blanket reinforcement.
  • the tensioning spindles are turned to relax the blanket, the locking elements are tilted by the second arm resting against fixed stops and the blanket armature is inevitably unlocked.
  • the blanket armor is locked when the tensioning spindles for tensioning the blanket are rotated by pulling the locking elements off the springs as they are turned away from the fixed stops.
  • the disadvantage of this device is that there is no certainty as to whether the printing blanket is also properly locked during tensioning.
  • the blanket reinforcement is clamped without any signs of incorrect operation even if it is not yet properly locked. There is then a danger that it will come loose from the clamp during operation and cause damage to the machine.
  • the clamping of the blanket armature is at such a flat angle to the jacket of the clamping spindle that the tensile force from the blanket tension must be intercepted to a large extent via the blanket armature, which can lead to damage to the blanket.
  • the locking of the blanket armature even partially opened during operation due to the interaction of the centrifugal force on the locking elements and a torque of the blanket armature from the tensile force of the blanket tension.
  • the tensile force should be derived from the tension of the blanket in such a way that no damage to the blanket can occur in the area of the reinforcement and it is also excluded that a tensile load from the blanket tension is applied solely via the reinforcement.
  • the invention is solved according to the characterizing part of patent claim 1.
  • This arrangement ensures that the printing blanket is only tensioned if it has been properly locked beforehand. The tensioning process is prevented if the blanket armor is only partially inserted. Since the locking elements cannot close now, the tension shaft cannot be rotated either.
  • the arrangement also supports the operator in that slight misalignments during the insertion of the blanket ends are compensated for by the locking elements by the blanket reinforcement. can slide into the locked position.
  • the radial position of the blanket reinforcement in the tensioning shaft deflects the blanket at an early stage and thus creates more friction surface for the transmission of the tensile forces. This reduces the introduction of force into the blanket reinforcement.
  • the arrangement of the spring elements for opening the locking elements in the unlocked position within a stop bar is advantageous.
  • This stop bar together with the one surface of the recess in the tensioning shaft, forms a slot which facilitates the insertion of the blanket armature and provides support against the tilting movement of the blanket armature when the blanket is tensioned. Opening the lock by centrifugal force or rubber blanket is completely impossible because of the positive locking.
  • FIG. 1 shows a section through the device with the locking elements open
  • Fig. 2 shows a section through the device with locked blanket reinforcements
  • Fig. 3 shows a section through the device with a tensioned blanket
  • Fig. 4 is a view of the tension shafts in the installed position, the channel cover and the counterweights are cut away.
  • a tensioning shaft 2 is rotatably mounted at the beginning of the print and a further tensioning shaft 3 at the end of the print for tensioning a printing blanket 4 on the cylinder 1.
  • bearing journals 5 are inserted into the end of the tensioning shafts 2, 3 and support elements 6, 7 are arranged in the cylinder channel.
  • the clamping shafts 2, 3 are held on the bearing journal 5 in the cylinder 1 and are supported by the support elements 6, 7 at four points against deflection.
  • Clamping blocks 8, 9 are arranged between the clamping shafts 2, 3 and are arranged symmetrically at two points of the clamping shafts 2, 3.
  • the support elements 6, 7 each have a radius corresponding to the chip shafts 2, 3 and support them over more than a quarter of their circumference.
  • the tension shafts 2, 3 are rotatable in the support surfaces 10, 11.
  • the spaces between the support elements 6, 7 offer movement space for the worm gear segments 12, 13 and stop screws 14, 15, 16, 17.
  • the worm gear segments 12, 13 are inserted in the back turns of the tensioning shafts 2, 3 and engage in worms 18, 19 which from Spannschrau ben 20, 21 from bevel gear 22, 23 are rotated.
  • the tensioning shafts 2, 3 can be adjusted in this way by one tensioning screw 20, 21 each.
  • the tensioning shafts 2, 3 each have a recess over their entire length, which is triangular in cross section and one side of which is located radially in the tensioning shaft and is narrower than the second side arranged at right angles to this.
  • the narrower side has a nose 24, 25 on the circumference of the tensioning shaft 2, 3 which is used to hold the reinforcement 42 of the
  • Printing blanket 4 is used.
  • the wider, parallel to a diameter surface of the recess each has a groove 26, 27 into which the locking element 28, 29 is inserted with the web 30, 31 on its underside.
  • Locking elements 28, 29 are designed in the shape of a circular arc. They are in each case on closing curves 32, 33, which are incorporated into the clamps 8, 9. The rear sides of the locking elements 28, 29 and the closing curves 32, 33 are essentially concentric with the axes of the tensioning shafts.
  • the closing curves have an opening part 34 and a closing part 35.
  • the closing part 35 has a radius corresponding to the rear of the locking elements 28, 29, while the curve curvature in the opening part 34 continuously decreases, so that the area of the closing curve 32, 33 deviates outwards from the radius of the closing part 35.
  • the locking elements 28, 29 finally rest on spring elements 36, which are held in stop bars 37, 38.
  • the stop bars 37, 38 are in turn on the wider surface of the recesses in the tension shafts 2, 3 under the locking elements elements 28, 29 and arranged parallel to the grooves 26, 27. Its side facing the narrow surface of the recess is designed as a guide surface for inserting the reinforcement 42 of the printing blanket 4.
  • the locking elements 28, 29 are thus supported between the closing curve 32, 33, groove 26, 27 and spring elements 36.
  • Hinges 39 are arranged to hold the locking elements 28, 29, the pivot point of which lies in an axis of rotation of the webs 30, 31 and the grooves 26, 27.
  • An additional counterweight 40 for balancing the cylinder 1 is arranged between the jacks 8, 9.
  • the clamps 8, 9 can be combined with the counterweight 40.
  • a duct cover 41 is attached to the counterweight 40.
  • the channel cover 41 leaves slots laterally in the circumferential direction for inserting the printing blanket 4 into the tensioning shafts 2, 3 and has openings for operating the tensioning screws 20, 21.
  • Fig. 1 the device is shown with opened locking elements.
  • the blanket 4 is first inserted with one end in the direction of the arrow into the tension shaft 2 at the beginning of the print.
  • the reinforcement 42 is pushed against the stop bar 37.
  • the tensioning shaft 2 By turning the tensioning shaft 2 in the tensioning direction, the locking element 28 is tilted to the left by the closing curve 32.
  • the reinforcement 42 therefore hooks on the one hand on the nose 24 of the tensioning shaft 2, while on the other side it is secured by the locking element 28.
  • the tensioning shaft places the printing blanket around the edge of the recess of the tensioning shaft 2 and on its surface. Therefore, the back turns for the worm gear segments 12, 13 are provided with filler segments 43, 44.
  • the contact surface for the printing blanket 4 is smooth.
  • the clamping process and the subsequent tensioning take place accordingly on the pushing end.
  • the underlay sheet 45 are hooked into a slot in the support element 6 at the start of printing.
  • the force from the printing blanket tension is caught by folding the printing blanket 4 at a right angle mainly via the friction on the tensioning shafts 2, 3.
  • the angle of the tensile force of the blanket 4 on the reinforcement 42 cannot change.

Landscapes

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

Abstract

Le dispositif pour fixer et tendre un blanchet sur un cylindre d'une imprimeuse doit être protégé contre une fausse manipulation et contre une ouverture accidentelle. De plus, les forces provenant de la mise sous tension du blanchet doivent être conduites de façon que l'armature n'absorbe plus la traction totale. A cet effet, un rouleau tendeur (2) comprend un organe de verrouillage (28) qui est pressé automatiquement par une came (32) en position de verrouillage, ou en position d'ouverture lors d'une rotation appropriée du rouleau tendeur. L'organe de verrouillage (28) pourvu d'une nervure (30) est reçu dans une rainure (26) contre une face d'un évidement rectangulaire du rouleau tendeur (2) et est supporté par des éléments à ressort (36). La came (32) agit sur l'arrière de l'élément de verrouillage. L'armature (42) du blanchet (4) est accrochée à un nez (24) dans l'évidement du rouleau tendeur (2), où elle est guidée par un listel de butée (37) et bloquée par l'élément de verrouillage (28). L'armature (42) est disposée radialement par rapport au rouleau tendeur (2) et est tenue à une certaine distance de lui de façon que le blanchet s'applique, lors de la mise sous tension, contre une arête et puis contre la surface du rouleau tendeur (2).
EP19830901595 1982-05-26 1983-05-24 Dispositif de mise sous tension d'un blanchet en caoutchouc Expired EP0110908B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83901595T ATE23485T1 (de) 1982-05-26 1983-05-24 Gummituchspannvorrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823219741 DE3219741C1 (de) 1982-05-26 1982-05-26 Gummituchspannvorrichtung
DE3219741 1982-05-26

Publications (2)

Publication Number Publication Date
EP0110908A1 true EP0110908A1 (fr) 1984-06-20
EP0110908B1 EP0110908B1 (fr) 1986-11-12

Family

ID=6164520

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830901595 Expired EP0110908B1 (fr) 1982-05-26 1983-05-24 Dispositif de mise sous tension d'un blanchet en caoutchouc

Country Status (4)

Country Link
EP (1) EP0110908B1 (fr)
JP (1) JPS59500956A (fr)
DE (1) DE3219741C1 (fr)
WO (1) WO1983004218A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5334129A (en) * 1991-12-07 1994-08-02 Heidelberger Druckmaschinen Ag Cross-cutter for final treatment or finishing of webs of material
US6520085B1 (en) 1998-11-26 2003-02-18 Heidelberger Druckmaschinen Ag Device for tensioning a cylinder dressing on a printing machine-cylinder

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3545172A1 (de) * 1985-12-20 1987-07-02 Roland Man Druckmasch Vorrichtung zum passgerechten ausrichten eines gummituches auf einem gummituch- bzw. formzylinder
DE4127714A1 (de) * 1991-08-22 1993-02-25 Koenig & Bauer Ag Einrichtung zum befestigen und spannen eines drucktuches auf einem zylinder einer druckmaschine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE388029C (de) * 1921-10-23 1924-01-08 Vogtlaendische Maschinenfabrik Aufspannvorrichtung fuer biegsame Druckplatten an Gummidruckrotationsmaschinen
US2578406A (en) * 1948-05-15 1951-12-11 Time Inc Blanket clamp for blanket cylinders of printing presses
DE1227480B (de) * 1964-04-25 1966-10-27 Plamag Plauener Druckmaschinen Vorrichtung zum Aufspannen biegsamer Druckplatten auf dem Formzylinder einer Druckmaschine
DE1198376B (de) * 1964-04-29 1965-08-12 Roland Offsetmaschf Anordnung zum Befestigen des Gummituches auf dem Gummizylinder von Offsetdruckmaschinen
DE2606223A1 (de) * 1976-02-17 1977-08-18 Maschf Augsburg Nuernberg Ag Vorrichtung zum spannen des gummituches einer offsetdruckmaschine
DE2707643C3 (de) * 1977-02-23 1980-03-27 M.A.N. - Roland Druckmaschinen Ag, 6050 Offenbach Vorrichtung zum Spannen eines Drucktuches auf dem Zylinder einer Druckmaschine
GB1556389A (en) * 1977-05-02 1979-11-21 Linotype Machinery Ltd Printing machines

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8304218A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5334129A (en) * 1991-12-07 1994-08-02 Heidelberger Druckmaschinen Ag Cross-cutter for final treatment or finishing of webs of material
US6520085B1 (en) 1998-11-26 2003-02-18 Heidelberger Druckmaschinen Ag Device for tensioning a cylinder dressing on a printing machine-cylinder

Also Published As

Publication number Publication date
EP0110908B1 (fr) 1986-11-12
JPS59500956A (ja) 1984-05-31
WO1983004218A1 (fr) 1983-12-08
DE3219741C1 (de) 1987-11-12

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