EP0529446B1 - Dispositif pour fixer et tendre un blanchet sur un cylindre d'une machine à imprimer - Google Patents

Dispositif pour fixer et tendre un blanchet sur un cylindre d'une machine à imprimer Download PDF

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Publication number
EP0529446B1
EP0529446B1 EP92113947A EP92113947A EP0529446B1 EP 0529446 B1 EP0529446 B1 EP 0529446B1 EP 92113947 A EP92113947 A EP 92113947A EP 92113947 A EP92113947 A EP 92113947A EP 0529446 B1 EP0529446 B1 EP 0529446B1
Authority
EP
European Patent Office
Prior art keywords
tensioning
blanket
cylinder
rubber blanket
cam disc
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
EP92113947A
Other languages
German (de)
English (en)
Other versions
EP0529446A1 (fr
Inventor
Willi Richard Ludwig Dörsam
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.)
Koenig and Bauer AG
Original Assignee
Koenig and Bauer Albert 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 Koenig and Bauer Albert AG filed Critical Koenig and Bauer Albert AG
Publication of EP0529446A1 publication Critical patent/EP0529446A1/fr
Application granted granted Critical
Publication of EP0529446B1 publication Critical patent/EP0529446B1/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
    • 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 and tensioning a printing blanket on a cylinder of a printing press according to the preamble of claim 1.
  • a blanket tensioning device in which threaded bolts are arranged in the cylinder pit, which are connected via lever arms to the tensioning strips for the blanket. When the threaded bolts are actuated, the tensioning strips are pivoted and thus cause the tension of the rubber blanket. Tensioning the rubber blanket is, however, severely limited with regard to the tensioning path, since the swivel angle of the lever arms is limited.
  • a blanket tensioning device in which a locking element is arranged in the tensioning shaft is automatically pressed into a locking position by a closing curve.
  • the tensioning shafts of this device are actuated by worm segments and a worm as well as by bevel gear by means of tensioning screws, which results in a high power requirement due to the high frictional resistance of the worm.
  • the span of the tensioning shafts is limited because the locking elements change in their radii. Thus, a longer rubber blanket end cannot be clamped, which later has to be put around due to signs of wear at the start of printing.
  • the invention has for its object to provide a device for attaching and tensioning a printing blanket on a cylinder of a printing press, which makes it possible to hold the blanket while pulling and then to stretch a long blanket end with little effort.
  • the arrangement of a lock which is actuated by the same controls with which the blanket is stretched, allows easy handling of holding the blanket start when attaching the blanket on the cylinder.
  • a toothed gear smooth movement is achieved in rubber blanket tensioning in connection with a toothed rack, so that only a small amount of force is required to achieve the To actuate clamping shafts.
  • ⁇ As a result of a long tensioning path of the tensioning shafts by the angular amount ⁇ , it is possible to accommodate a long spare piece of a blanket end so that this can be added in the event of wear or other damage at the beginning of the blanket.
  • Fig. 1 shows a cross section through the inventive device in the cylinder channel in the rest position along the line A - B of FIG. 3, but with a rubber blanket inserted at the start of printing.
  • a tensioning shaft 3 extending in the axial direction is arranged in a known manner and has teeth 4 on its circumference.
  • a bearing block 7 is fastened by means of screws 5, which supports a shaft 8 which is connected in a rotationally fixed manner to an intermediate gear 11 via a feather key 9.
  • the shaft 8 is by means of locking rings 12; 13 performed on the bearing block 7.
  • a cam disk 16 is connected in a rotationally fixed manner to the shaft 8 via a fastening screw 14.
  • a bore 18 in the recess 6 of the cylinder pit 1 there is a bore 18 in the recess 6 of the cylinder pit 1 with an additional bore 19 for receiving a clamping screw 21.
  • the clamping screw 21 is supported on the one hand near the cylinder circumference on a holding plate 22 which has a hole 23 for actuating the clamping screw 21 and which is fastened in the cylinder pit 1 by means of stud bolts, not shown.
  • the clamping screw 21 is supported in the additional bore 19 on a thrust bearing 24 with an intermediate washer 26 via a pin 25.
  • the clamping screw 21 is surrounded over half its length with a toothed rack 27 which has a threaded hole which is in operative connection with the thread of the clamping screw 21.
  • the rack 27 is also held by the bearing block 7.
  • the tensioning shaft 3 has a milling 28 which runs in the axial direction and which receives a hook strip 29 for hanging the rubber blanket end 31 with the reinforcing plate 32 and the arm 33 of a hook-shaped locking device.
  • the locking device consists of the arm 33 with a hook 34 which extends at a right angle at one end.
  • the other side of the arm 33 has a bearing piece 36 which is approximately circular in cross section, whereby supports the bearing piece 36 in a further recess 37, which is located in the radial direction of the tensioning shaft 3 for the milling 28.
  • the bearing piece 36 has two fork-like guides 38 running at right angles, in the same direction as the hook 34, to which both ends of a pin 39 are guided.
  • the pin 39 is arranged transversely to the longitudinal axis through the upper end of a plunger 41.
  • the tappet 41 is operatively connected at its lower end to the cam disk 16 and can be actuated against the force of a compression spring 42 surrounding the tappet 41.
  • the compression spring 42 is delimited on the one hand by a radial blind hole in the tensioning shaft 3 and on the other hand by a washer 43 locked on the tappet 41.
  • this radial blind bore is continued by an elongated bore with a reduced diameter for receiving the plunger 41.
  • the device for fastening and tensioning a printing blanket on a cylinder of a printing press consists of an approximately on the left side of the center line 17 of the above-described device, with the help of which the rubber blanket 31 in the tensioning shaft 3 while laying around the Blanket cylinder 2 is held and can be tensioned.
  • the device for tensioning the other blanket end 31 ' On the right side of the center line 17 is the device for tensioning the other blanket end 31 ', which has been placed around the blanket cylinder 2.
  • the components arranged on this right-hand side of the center line 17 are each provided with a 'after the reference number, for example tensioning shaft 3'.
  • the function of the entire device is as described below.
  • the rubber blanket 31 is brought with its reinforcing plate 32 according to FIG. 1 behind the hook bar 29 into the cutout 28.
  • the cam of the cam disk 16 disengages from the tappet 41.
  • the tappet 41 thus moves downward in accordance with the force of the compression spring 42.
  • the pin 39 brings the fork-like guide 38 down; the hook 34 grips behind the reinforcement plate 32 of the rubber blanket start 31 and is now in the position according to FIG. 2.
  • the intermediate gear 11 is moved over the rack 27 by means of the clamping screw 21.
  • the rubber blanket is stretched.
  • the other tensioning shaft 3 can also be moved further in the direction of the arrow x in order to tension the rubber blanket further.
  • the clamping process is now complete.
  • the tensioning shaft 3 ' is moved by the amount of the angle ⁇ against the direction of the arrow x by rotating the tensioning screw 21'.
  • the tensioning shaft 3 ' is thus in the right position with the angle ⁇ according to FIG. 4.
  • the printing blanket is relaxed.
  • the tensioning shaft 3 is brought into the left position according to FIG. 4 by means of the tensioning screw 21.
  • the rubber blanket 31 has been adjusted in the arrow direction x by the angle ⁇ .
  • the possible damaged area of the printing blanket is now outside the printing area and is contained in whole or in part in the area of the angle ⁇ .
  • the angle ⁇ is a maximum of 135 o .

Claims (11)

  1. Dispositif pour fixer et tendre un blanchet sur un cylindre (2) d'une machine à imprimer, le dispositif étant disposé dans une cavité (1) parallèle à l'axe et comportant des arbres tendeurs (3, 3') pour tendre un blanchet, à l'aide d'un dispositif de fixation (28; 29; 32) pour l'amorce de blanchet (31) et l'extrémité de blanchet (31'), caractérisé en ce qu'une crémaillère (27; 27'), pouvant être actionnée au moyen d'une vis de serrage (21; 21'), est placée en liaison fonctionnelle, par une roue intermédiaire (11, 11'), avec des dents se trouvant sur la périphérie de l'arbre tendeur (3; 3'), de manière que soit prévu un blocage de l'amorce de blanchet (31), le blocage pouvant être actionné par une roue dentée intermédiaire (11) au moyen d'un disque de came (16) et d'un poussoir (41);
  2. Dispositif selon la revendication 1, caractérisé en ce que le blocage est constitué d'un bras (33) présentant, à l'une de ses extrémités, un crochet (34) orienté à angle droit par rapport à l'axe longitudinal du bras et, à son autre extrémité, une pièce de tourillonnement (36) à section transversale à peu près circulaire.
  3. Dispositif selon les revendications 1 et 2, caractérisé en ce que la pièce de tourillonnement (36) présente un guidage (38) fourchu, s'étendant à angle droit.
  4. Dispositif selon les revendications 1 à 3, caractérisé en ce qu'une tige (39) placée en liaison fonctionnelle avec le guidage fourchu (38) est disposé à angle droit par rapport à l'axe longitudinal du poussoir (41).
  5. Dispositif selon les revendications 1 à 4, caractérisé en ce que le poussoir (41) peut être actionné, par l'intermédiaire du disque à came (16), à l'encontre de la force à un ressort de pression (42).
  6. Dispositif selon les revendications 1 à 5, caractérisé en ce que la roue dentée intermédiaire (11) est reliée rigidement au disque à came (16).
  7. Dispositif selon les revendications 1 à 6, caractérisé en ce que la crémaillère (27; 27') présente un trou taraudé axiale, avec lequel la vis de serrage (21; 21') est en liaison fonctionnelle.
  8. Dispositif selon les revendications 1 à 7, caractérisé en ce que la vis de serrage (21; 21') peut prendre appui, d'une part, contre une tôle de maintien (22; 22') et, d'autre part, contre un palier de pressage (24; 24'), avec une rondelle intermédiaire (26,; 26').
  9. Dispositif selon les revendications 1 à 8, caractérisé en ce que le disque de came (16) est relié à la roue dentée intermédiaire (11) par l'intermédiaire d'un arbre (8).
  10. Dispositif selon les revendications 1 à 9, caractérisé en ce que l'arbre (8; 8'), la crémaillère (27; 27'), ainsi que le disque de came (16), sont disposés sur un bloc palier (7; 7') fixé, au moyen de vis (5; 5'), dans le fond d'un creusement (6; 6') ménagé dans la cavité de cylindre (1; 1').
  11. Dispositif selon les revendications 1 à 10, caractérisé en ce que, pour chaque cylindre porte-blanchet (1) sont prévus au moins deux dispositifs tendeur ainsi qu'un blocage pour l'amorce de blanchet (31).
EP92113947A 1991-08-22 1992-08-17 Dispositif pour fixer et tendre un blanchet sur un cylindre d'une machine à imprimer Expired - Lifetime EP0529446B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4127714 1991-08-22
DE4127714A DE4127714A1 (de) 1991-08-22 1991-08-22 Einrichtung zum befestigen und spannen eines drucktuches auf einem zylinder einer druckmaschine

Publications (2)

Publication Number Publication Date
EP0529446A1 EP0529446A1 (fr) 1993-03-03
EP0529446B1 true EP0529446B1 (fr) 1995-12-06

Family

ID=6438787

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92113947A Expired - Lifetime EP0529446B1 (fr) 1991-08-22 1992-08-17 Dispositif pour fixer et tendre un blanchet sur un cylindre d'une machine à imprimer

Country Status (4)

Country Link
US (1) US5315931A (fr)
EP (1) EP0529446B1 (fr)
JP (1) JPH05220935A (fr)
DE (2) DE4127714A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4326248C2 (de) * 1992-12-24 1996-05-15 Koenig & Bauer Albert Ag Spannvorrichtung in einer Rotationsdruckmaschine
DE9319411U1 (de) * 1992-12-24 1994-02-10 Koenig & Bauer Ag Spannvorrichtung in einer Rotationsdruckmaschine
DE9317726U1 (de) * 1992-12-24 1994-02-03 Koenig & Bauer Ag Spindel
DE4326251C2 (de) * 1993-08-05 1997-08-28 Koenig & Bauer Albert Ag Gummi-/Drucktuchzylinder
DE4326250C2 (de) * 1993-08-05 1996-05-15 Koenig & Bauer Albert Ag Spannvorrichtung in einer Rotationsdruckmaschine
DE19515632C2 (de) * 1995-04-28 2000-11-30 Koenig & Bauer Ag Vorrichtung zum Verstellen von Vordermarken auf einem Zylinder in einer Bogenrotationsdruckmaschine
US6026746A (en) * 1998-09-22 2000-02-22 E. R. Smith Associates, Inc. Lock-up assembly for plate cylinders of rotary presses
DE10224301B4 (de) 2001-07-30 2022-06-15 Heidelberger Druckmaschinen Ag Vorrichtung zum Halten und Spannen eines Zylinderaufzugs
JP2009160927A (ja) * 2007-12-13 2009-07-23 Komori Corp ブランケットまたは版の装着装置
US8397636B2 (en) * 2010-09-22 2013-03-19 E I Du Pont De Nemours And Company Method and apparatus for tensioning a printing form
DE102019111510A1 (de) 2019-05-03 2020-11-05 Koenig & Bauer Ag Druckwerk für eine Offsetdruckmaschine mit einem mindestens ein Gummituch tragenden Gummizylinder und Verfahren zum Handhaben eines Gummituches

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125023A (en) * 1964-03-17 Blanket tensioning means for the impression
GB266520A (en) * 1926-02-01 1927-03-03 Fred Wesley Wright Improvements in and relating to tensioning devices for blankets and printing plates in printing machines
GB402103A (en) * 1932-05-24 1933-11-24 Frederick Grafton Lougee Improvements in or relating to means for clamping printing plates, fudge boxes and the like
US2409830A (en) * 1943-02-16 1946-10-22 Hoe & Co R Printing plate clamping mechanism
US2859693A (en) * 1956-07-20 1958-11-11 Cottrell Company Printing plate tension hook
US3020842A (en) * 1960-05-12 1962-02-13 Hoe & Co R Offset printing plate clamp
US3195457A (en) * 1963-05-22 1965-07-20 Cottrell Company Printing plate lockup means
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
DE2953815C2 (de) * 1979-03-20 1983-11-03 Koenig & Bauer AG, 8700 Würzburg Gummituchspannvorrichtung
JPS584671Y2 (ja) * 1980-01-08 1983-01-26 リョービ株式会社 オフセット印刷機における胴張りシ−トの取付装置
DE3219741C1 (de) * 1982-05-26 1987-11-12 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Gummituchspannvorrichtung

Also Published As

Publication number Publication date
US5315931A (en) 1994-05-31
DE59204571D1 (de) 1996-01-18
DE4127714A1 (de) 1993-02-25
EP0529446A1 (fr) 1993-03-03
DE4127714C2 (fr) 1993-08-05
JPH05220935A (ja) 1993-08-31

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