EP0261413B1 - Pince pour machines rotatives à feuilles - Google Patents

Pince pour machines rotatives à feuilles Download PDF

Info

Publication number
EP0261413B1
EP0261413B1 EP87112208A EP87112208A EP0261413B1 EP 0261413 B1 EP0261413 B1 EP 0261413B1 EP 87112208 A EP87112208 A EP 87112208A EP 87112208 A EP87112208 A EP 87112208A EP 0261413 B1 EP0261413 B1 EP 0261413B1
Authority
EP
European Patent Office
Prior art keywords
gripper
support
spring
force
base body
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
EP87112208A
Other languages
German (de)
English (en)
Other versions
EP0261413A3 (en
EP0261413A2 (fr
Inventor
Claus Simeth
Valentin Gensheimer
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 AT87112208T priority Critical patent/ATE74065T1/de
Publication of EP0261413A2 publication Critical patent/EP0261413A2/fr
Publication of EP0261413A3 publication Critical patent/EP0261413A3/de
Application granted granted Critical
Publication of EP0261413B1 publication Critical patent/EP0261413B1/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
    • 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 clamping gripper for sheet-fed rotary printing machines according to the preamble of the claim.
  • the gripper base body is worked out in the form of a half-shell and its one end is connected to the spring base point located on the clamp piece. The other end is supported on the gripper support when the gripper is closed and on the support stop when the gripper is open.
  • the disadvantage is that the resulting resultant in the same direction does not run through the transfer point of the arc at the gripper tip.
  • a gripper remains sensitive to unintentional changes in the direction of the bearing force, because this also results in a change in direction of the resultant and a shift in the dynamic contact point between the gripper shaft and the bearing bore of the rotating gripper body.
  • the gripper pushes in the printing through shifting the center of the passport game.
  • the unintentional changes in direction of the contact force are caused e.g. due to changing high paper tensile forces, which arise from the tearing of the sheet at a kink angle from the blanket of the blanket cylinder.
  • a second spring is additionally provided to compensate for bearing forces. This gripper also remains sensitive to unintentional changes in direction of the contact force.
  • Gripper bodies are also generally known which have a closed bearing bore and on the gripper shaft are rotatably supported to form a sprag.
  • the bearing fit cannot be selected very finely, since the bearing point on the gripper shaft cannot be lubricated and cannot be protected against the ingress of paper dust and powder.
  • the grippers seize themselves on the gripper shaft and thus lose their suspension. Since this and the associated damage to the expensive gripper shaft must be avoided, a large bearing clearance is often permitted.
  • the object of the invention is to provide a clamping gripper in which the resulting resultant run in the same direction through the transfer point at the gripper tip.
  • the particular advantage of the clamp gripper according to the invention is that the dynamic contact point between the bearing bore of the gripper base body and the gripper shaft is maintained in continuous printing, regardless of the size and direction of the paper tensile forces caused by the adhesive forces of the rubber blanket.
  • the clamp gripper has a favorable vibration behavior of a short Gripper because of the upper contact point, eg high natural frequency with small amplitude. Both are particularly important for high-speed printing presses and were previously not possible.
  • Fig. 1 the known phenomenon is shown schematically that in production a sheet 1 of a blanket cylinder 2 and a printing cylinder 3 interacting with a blanket cylinder 4 under the bending angle under paper tensile forces 5 and 5 'of the blanket 7, which must be torn off on the clamp gripper 6 act on the gripper tip 15 in variable size and direction.
  • a delivery drum is designated in Fig. 1.
  • a clamping piece 10 is fastened to a gripper shaft 9 by means of a clamping screw 27.
  • a gripper base body 11, which has a closed bearing bore, is brought into contact with the clamping piece 10 by a spring 12.
  • the arrangement of a support plane 14 on the clamping piece 10, the gripper tip 15, the bearing bore 13 of the gripper base body 11 and the spring 12 is chosen so that the lines of action the spring force 18, the support force 19 and the contact force 20 intersect at the transfer point 21 at the gripper tip 15, ie both when the direction of the resulting resultant 16 is determined by the spring force 18 and the support force 19, and when the clamp gripper 6 is closed, if the resulting resultant 16 'is determined by the spring force 18 and the contact force 20. All forces 5, 5 ', 16, 16', 18, 19, 20 thus intersect at the transfer point 21 at the gripper tip 15.
  • the gripper Since the gripper is centered at a minimal distance from the transfer point 21 at the support point 17, it also exhibits a favorable vibration behavior of a short gripper, such as low amplitude and high natural frequency. Both advantages are particularly important for high-speed machines.
  • the clamping gripper 6 shown in the exemplary embodiment also has the known means, such as a clamping screw 27, which clamps the clamping piece 10 on the gripper shaft 9.
  • a clamping screw 27 As a bearing for the spring 12, an extension 23 is provided on the clamping piece 10 and an extension 24 is provided on the gripper base body 11, which lie opposite one another.
  • the preload of the spring 12 can be adjusted by means of an adjusting screw 25 on the gripper base body 11.
  • the adjusting screw 25 also serves as a stop screw.
  • the spring 12 acts with its force on the gripper base body 11 and presses the adjusting screw 25 against the support plane 14 on the clamping piece 10.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Advancing Webs (AREA)
  • Handling Of Cut Paper (AREA)

Claims (1)

  1. Pince de serrage (6) pour des imprimantes rotatives à feuilles, comportant une pièce de serrage (10) fixée sur un arbre de pince (9), qui est munie d'un emplacement (23) pour pied de ressort et d'une butée d'appui, ainsi qu'un corps de base de pince (11) agencé, avec un jeu d'ajustement déterminé, de façon rotative sur l'arbre de pince (9), avec son alésage de montage (13), dans lequel une pièce (24) est reliée à l'emplacement (23) pour pied de ressort, se trouvant sur la pièce de serrage (10), par l'intermédiaire d'un ressort (12), et dans lequel une vis de réglage (25) prévue sur le corps de base (11) s'appuie, lorsque la pince (6) est ouverte, sur la butée d'appui, tandis que, lorsque la pince (6) est fermée, un bout de pince (15) du corps de base (11) s'appuie sur une surface d'appui (22) de la pince, dans lequel, de plus, le ressort (12) est agencé, et le plan d'appui (14) sur la butée d'appui ainsi que la surface d'appui (22) sont inclinés, de sorte que la résultante engendrée par la force du ressort (18) et la force d'appui (19) a la même direction que la résultante engendrée par la force du ressort (18) et la réaction d'appui (20) sur le bout de pince (15),
    caractérisée en ce que le ressort (12) est agencé, et le plan d'appui (14) ainsi que la surface d'appui (22) de la pince présentent une inclinaison l'un par rapport à l'autre, de sorte que la force du ressort (18), la force d'appui (19) et la réaction d'appui (20) se coupent sur le bout de pince (15) au point de jonction (21).
EP87112208A 1986-09-26 1987-08-22 Pince pour machines rotatives à feuilles Expired - Lifetime EP0261413B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87112208T ATE74065T1 (de) 1986-09-26 1987-08-22 Klemmgreifer fuer bogenrotationsdruckmaschinen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3632768A DE3632768C1 (de) 1986-09-26 1986-09-26 Klemmgreifer fuer Bogenrotationsdruckmaschinen
DE3632768 1986-09-26

Publications (3)

Publication Number Publication Date
EP0261413A2 EP0261413A2 (fr) 1988-03-30
EP0261413A3 EP0261413A3 (en) 1990-01-31
EP0261413B1 true EP0261413B1 (fr) 1992-03-25

Family

ID=6310435

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87112208A Expired - Lifetime EP0261413B1 (fr) 1986-09-26 1987-08-22 Pince pour machines rotatives à feuilles

Country Status (5)

Country Link
US (1) US4873926A (fr)
EP (1) EP0261413B1 (fr)
JP (1) JPH0698744B2 (fr)
AT (1) ATE74065T1 (fr)
DE (2) DE3632768C1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL111846A0 (en) 1994-12-01 1995-03-15 Indigo Nv Imaging apparatus and intermediate transfer blanket therefor
US5335054A (en) * 1989-02-06 1994-08-02 Spectrum Sciences B.V. Image transfer apparatus including intermediate transfer blanket
DE4026237C1 (fr) * 1990-08-18 1992-02-06 Man Miller Druckmaschinen Gmbh, 6222 Geisenheim, De
DE4321850A1 (de) * 1993-07-01 1995-01-12 Roland Man Druckmasch Greifer für Bogendruckmaschinen
DE69528188T2 (de) * 1994-10-11 2003-05-15 Indigo N.V., Maastricht Bilderzeugungsgeraet sowie zwischenuebertragungsfolie
DE19613963C2 (de) * 1996-04-09 1999-03-04 Heidelberger Druckmasch Ag Vorrichtung zum Ablösen eines Bogens von einem Gummizylinder einer Druckmaschine
DE102006018992B4 (de) * 2006-04-25 2017-12-14 Koenig & Bauer Ag Lagerkörper in Bogendruckmaschinen
JP4929079B2 (ja) * 2007-07-05 2012-05-09 リョービ株式会社 枚葉印刷機

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2599776A (en) * 1947-05-24 1952-06-10 Miehle Printing Press & Mfg Sheet gripper structure and setting means therefor
US2928344A (en) * 1956-10-25 1960-03-15 Maschf Augsburg Nuernberg Ag Gripping device for printing presses
CH356144A (de) * 1956-10-25 1961-08-15 Maschf Augsburg Nuernberg Ag Greifer an Druckmaschinen
US2933040A (en) * 1958-12-19 1960-04-19 Harris Intertype Corp Sheet gripper element
DE1174804B (de) * 1962-06-26 1964-07-30 Planeta Veb Druckmasch Werke Bogengreifer an bogenverarbeitenden Maschinen
DE1761033A1 (de) * 1968-03-25 1971-04-08 Polygraph Leipzig Bogengreifer an bogenverarbeitenden Maschinen
GB1180547A (en) * 1968-04-16 1970-02-04 Planeta Veb Druckmasch Werke Sheet Grippers
DE1908181A1 (de) * 1969-02-19 1970-11-05 Roland Offsetmaschf Klemmgreifer fuer Bogenrotationsdruckmaschinen
GB1338525A (en) * 1971-06-08 1973-11-28 Cigardi Omc Sa Disconnect arrangement for multi-unit printing press
DD226519B1 (de) * 1984-09-05 1990-10-10 Polygraph Leipzig Bogengreifer fuer bogenver- und -bearbeitende maschinen
DE3529639A1 (de) * 1985-08-19 1987-02-26 Roland Man Druckmasch Federnder greifer fuer bogenrotationsdruckmaschinen
DE3529596A1 (de) * 1985-08-19 1987-02-26 Roland Man Druckmasch Federnder greifer fuer bogenrotationsdruckmaschinen

Also Published As

Publication number Publication date
DE3632768C1 (de) 1988-01-14
JPS6394845A (ja) 1988-04-25
EP0261413A3 (en) 1990-01-31
DE3777734D1 (de) 1992-04-30
EP0261413A2 (fr) 1988-03-30
JPH0698744B2 (ja) 1994-12-07
ATE74065T1 (de) 1992-04-15
US4873926A (en) 1989-10-17

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