EP0213398B1 - Pince à ressort pour rotatives à feuille - Google Patents

Pince à ressort pour rotatives à feuille Download PDF

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Publication number
EP0213398B1
EP0213398B1 EP86110492A EP86110492A EP0213398B1 EP 0213398 B1 EP0213398 B1 EP 0213398B1 EP 86110492 A EP86110492 A EP 86110492A EP 86110492 A EP86110492 A EP 86110492A EP 0213398 B1 EP0213398 B1 EP 0213398B1
Authority
EP
European Patent Office
Prior art keywords
gripper
finger
shaft
spring
clamping piece
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
Application number
EP86110492A
Other languages
German (de)
English (en)
Other versions
EP0213398A2 (fr
EP0213398A3 (en
Inventor
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.)
Manroland AG
Original Assignee
MAN Roland 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 MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Priority to AT86110492T priority Critical patent/ATE46860T1/de
Publication of EP0213398A2 publication Critical patent/EP0213398A2/fr
Publication of EP0213398A3 publication Critical patent/EP0213398A3/de
Application granted granted Critical
Publication of EP0213398B1 publication Critical patent/EP0213398B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines
    • B41F21/10—Combinations of transfer drums and grippers
    • B41F21/104—Gripper details

Definitions

  • the invention relates to a resilient gripper for sheet-fed rotary printing presses according to the preamble of the first claim (CH-A-485 579).
  • resilient grippers of the type mentioned are designed in such a way that they can evenly absorb the tension that is exerted on the grippers by the paper. Since a slight pulling out of the paper from the gripper causes doubling or registration problems, one always tries to design the gripper with the maximum holding force.
  • a vertically closing gripper with a controlled gripper shaft is known from DE-PS-2 030 040.
  • a disadvantage is the frictional control of the gripper shaft relative to the fulcrum of a control lever by means of a guide on a control cam.
  • the additional control effort leads to an increase in the inertial forces of the system vibrating with a large radius of inertia and thus to a reduction in the performance of the printing press.
  • the control cam is heavily soiled, precise guidance in the second vertical, movement phase is no longer possible.
  • the invention has for its object to give the gripper finger in a gripper of the type mentioned in a second movement phase a positive movement approximately perpendicular to the gripper pad with additional strengthening of the holding force.
  • the advantages of the invention are that the holding process is carried out separately from the gripping process with a force-boosting lever transmission.
  • the axis of rotation of the gripper in the joint 6 is very small in diameter, so that the friction loss is negligible.
  • the gripper maintains its statically determined position even at very high machine speeds.
  • the position of the gripper shaft no longer needs to be a compromise, as is the case with conventional grippers, in such a way that on the one hand it must be conveniently located in relation to the pushing of the grippers, ie as close as possible to the height of the cylinder jacket and on the other hand at right angles below the tip so that the free movement around the leading edge of the paper is ensured with the smallest possible swivel angle.
  • the stop 9 lies in the plane of the paper, so that no play change occurs in the joint 6 during the closing process.
  • the stop 13 in the pulling direction for the gripper base body 10 is in the vicinity of the joint 6. This guarantees an optimal position fixation of the joint 6 with a minimal mass design of the individual rotary transmissions.
  • a groove 2 is incorporated in a cylinder 1, in which a gripper shaft 3 with a fixed axis is mounted.
  • a clamping piece 4 is clamped on the gripper shaft 3.
  • a gripper support 5 is attached to a wall of the groove 2, the gripper support surface of which is at the same height as the peripheral surface of the cylinder 1.
  • a gripper finger 11 is connected by a joint 6 to a base body 10, which is loosely mounted around the gripper shaft 3. Between the gripper base body 10 or the gripper finger 11 and the arms of the clamping piece 4, compression springs 7, 8 are arranged opposite one another with respect to the gripper shaft 3. The gripper finger 11 and the base body 10 are pressed non-positively onto the clamping piece 4 by means of the compression springs 7, 8 and adjustable stops 9, 12.
  • the gripper shaft 3 including the clamping piece 4 can be moved via the gripper control 15 until the base body 10 is supported on the cylinder 1 by means of a stop 13.
  • the gripper is swung in over the arc so that the gripper tip 14 is open at this time about 2 mm.
  • the pivot point of the gripper now changes from the gripper shaft 3 to the joint 6.
  • the clamping piece 4 is moved further via the gripper control 15 and presses the gripper tip 14 onto the bow via the spring 8 with an extended lever arm.
  • the stop 9, with which the gripper finger 11 is supported on the clamping piece 4, is then free.
  • the additional strengthening of the holding force is brought about by the transmission ratio of the extended lever arm to the supported shorter lever arm.
  • a multifunctional gripper control for the gripping process or the holding process can be achieved with only one control curve of the gripper control 15, since, with an improved holding effect as a result of force-intensifying lever transmission in conjunction with a sliding-free, approximately vertical gripper closure, free movement is also possible the leading edge of the paper can be reached with the smallest possible swivel angle during the gripping process, and the gripper shaft 3 can also be stored deep within the cylinder 1 as vertically as possible under the gripper tip 14. Bearing play on the gripper shaft 3 or otherwise due to increasing holding forces inevitably significantly increasing frictional forces and an inertia due to frictional losses no longer have a strong effect on the "bite", i.e.
  • the gripper according to the invention does not work sluggishly.
  • the gripper finger 11 and the base body 10 maintain their statically determined position even at very high machine speeds, since the gripping and holding process are separated in good time before the centering of the gripper tip 14.
  • the clamping piece 4 is fastened on the gripper shaft 3 in a known manner by means of the clamping screw 16, as indicated in FIG. 1.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Discharge By Other Means (AREA)

Claims (3)

  1. Pince à ressort pour machines imprimantes rotatives à feuilles, comportant une pièce de serrage (4) fixée à un arbre de pince (3), qui présente des butées, parmi lesquelles une butée est couplée à un doigt de pince (11) en forme de languette par l'intermédiaire d'un premier ressort (8), comportant de plus un corps de base (10), monté de façon lâche autour de l'arbre de pince (3), qui présente une butée, qui, sous l'action d'un second ressort (7), lorsque la pince est fermée, est appuyé, par l'intermédiaire d'une première butée réglable (13), contre un cylindre (1), un tambour ou analogue,
  2. caractérisée en ce que le corps de base (10), sous l'action du second ressort (7), est appuyé, par l'intermédiaire d'une deuxième butée réglable (12), contre la pièce de serrage (4), en ce que le corps de base (10) est relié, avec un court bras de levier, à une extrémité du doigt de pince (11) en forme de languette dans la zone d'un bout de pince (14) renforcé en section transversale, par l'intermédiaire d'une charnière (6) prévue à proximité de la périphérie du cylindre (1), tambour ou analogue, tandis que la pièce de serrage (4) est couplée, avec un long bras de levier, à l'autre extrémité du doigt de pince (11) en forme de languette, par l'intermédiaire du premier ressort (8), en ce que, de plus, sous l'action du premier ressort (8), le bout de pince (14) du doigt de pince (11) en forme de languette peut être appuyé, lorsque la pince est ouverte, sur la pièce de serrage (4), par l'intermédiaire d'une troisième butée réglable (9), et en ce que la première butée réglable (13) peut être appuyée latéralement sur l'appui de pince (5).
EP86110492A 1985-08-19 1986-07-30 Pince à ressort pour rotatives à feuille Expired EP0213398B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86110492T ATE46860T1 (de) 1985-08-19 1986-07-30 Federnder greifer fuer bogenrotationsdruckmaschinen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3529656 1985-08-19
DE19853529656 DE3529656A1 (de) 1985-08-19 1985-08-19 Federnder greifer fuer bogenrotationsdruckmaschinen

Publications (3)

Publication Number Publication Date
EP0213398A2 EP0213398A2 (fr) 1987-03-11
EP0213398A3 EP0213398A3 (en) 1987-10-28
EP0213398B1 true EP0213398B1 (fr) 1989-10-04

Family

ID=6278851

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86110492A Expired EP0213398B1 (fr) 1985-08-19 1986-07-30 Pince à ressort pour rotatives à feuille

Country Status (5)

Country Link
US (1) US4864929A (fr)
EP (1) EP0213398B1 (fr)
JP (1) JPS6251451A (fr)
AT (1) ATE46860T1 (fr)
DE (1) DE3529656A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3821324C2 (de) * 1988-06-24 1994-03-10 Heidelberger Druckmasch Ag Bogengreifer an Bogenrotationsdruckmaschinen
DE3921474A1 (de) * 1989-06-30 1991-01-10 Heidelberger Druckmasch Ag Bogengreifereinrichtung fuer bogenrotationsdruckmaschinen
DE4012497A1 (de) * 1990-04-19 1991-10-24 Roland Man Druckmasch Saugersteuerung in bogenuebergabetrommeln in mehrfarben-bogendruckmaschinen
DE4210327A1 (de) * 1992-03-30 1993-10-07 Koenig & Bauer Ag Bogenwendeeinrichtung in einer Rotationsdruckmaschine
GB2268928B (en) * 1992-07-22 1995-10-18 Heidelberger Druckmasch Ag Sheet gripper for a paper-carrying cylinder of a sheet-fed printing press
FR2744708B1 (fr) * 1996-02-09 1998-04-30 Heidelberg Harris Sa Butee deplacable disposee sur des cylindres de machines rotatives a imprimer sur lesquels passent les produits
CN101301809B (zh) * 2007-05-11 2012-05-30 海德堡印刷机械股份公司 单张纸印刷机印刷装置之间的递纸辊
CN108203010B (zh) * 2016-12-20 2021-03-09 博斯特（上海）有限公司 牙排锁定装置和片材处理设备

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD67992A (fr) *
DE493269C (de) * 1930-03-05 Mailaender Fa J G Greifer bei Druckzylindern fuer Druckmaschinen
DD66634A (fr) *
GB310177A (en) * 1928-04-14 1929-04-25 Fred Wesley Wright Improvements in and relating to sheet-gripping mechanisms for printing machines
US2599776A (en) * 1947-05-24 1952-06-10 Miehle Printing Press & Mfg Sheet gripper structure and setting means therefor
AT298522B (de) * 1968-02-21 1972-04-15 Polygraph Leipzig Vorrichtung zum klemmen von materialbogen
DE1908181A1 (de) * 1969-02-19 1970-11-05 Roland Offsetmaschf Klemmgreifer fuer Bogenrotationsdruckmaschinen
US3606308A (en) * 1969-06-20 1971-09-20 Miller Printing Machinery Co Sheet gripping device
US3937642A (en) * 1971-02-20 1976-02-10 Hermann Kronseder Labeling device with an installation for marking labels
DE2233431C3 (de) * 1972-07-07 1983-12-29 Koenig & Bauer AG, 8700 Würzburg Greifer für Druckmaschinen
ES230780Y (es) * 1977-08-26 1978-07-01 Conjunto de pinza y abrazadera para el transporte de laminasen maquinas litograficas.
DD154083A1 (de) * 1980-11-17 1982-02-24 Arndt Jentzsch Bogengreifereinrichtung
JPS57182443A (en) * 1981-05-08 1982-11-10 Komori Printing Mach Co Ltd Front guide device for sheet fed press

Also Published As

Publication number Publication date
JPH0530384B2 (fr) 1993-05-07
DE3529656C2 (fr) 1988-05-26
EP0213398A2 (fr) 1987-03-11
US4864929A (en) 1989-09-12
EP0213398A3 (en) 1987-10-28
DE3529656A1 (de) 1987-02-26
ATE46860T1 (de) 1989-10-15
JPS6251451A (ja) 1987-03-06

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