EP0212365B1 - Gripper arrangement for sheet-fed rotary printing machines - Google Patents

Gripper arrangement for sheet-fed rotary printing machines Download PDF

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Publication number
EP0212365B1
EP0212365B1 EP86110487A EP86110487A EP0212365B1 EP 0212365 B1 EP0212365 B1 EP 0212365B1 EP 86110487 A EP86110487 A EP 86110487A EP 86110487 A EP86110487 A EP 86110487A EP 0212365 B1 EP0212365 B1 EP 0212365B1
Authority
EP
European Patent Office
Prior art keywords
gripper
sheet
tip
rotary printing
fed rotary
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
EP86110487A
Other languages
German (de)
French (fr)
Other versions
EP0212365A2 (en
EP0212365A3 (en
Inventor
Manfred Rüger
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 AT86110487T priority Critical patent/ATE38491T1/en
Publication of EP0212365A2 publication Critical patent/EP0212365A2/en
Publication of EP0212365A3 publication Critical patent/EP0212365A3/en
Application granted granted Critical
Publication of EP0212365B1 publication Critical patent/EP0212365B1/en
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 sheet gripper device on sheet-fed rotary printing machines according to the preamble of the first claim.
  • Such a sheet gripper device is known from publication FR-A-2 345 377: an inelastic pressure piece is attached to the gripper tip via an elastic intermediate layer.
  • the non-elastic pressure piece is formed by glass fibers that protrude from a soft plastic and are deformable. Functional, manufacturing and assembly related parallelism errors as well as the influence of the substrate thickness cannot be compensated for reliably by such a hard holding surface. Since the sheet is held non-positively, it is always important to have a uniform wearing pattern, especially if significant tractive forces act on the sheet to be removed when processing smooth printing materials and printing inks with high toughness at high machine speeds, which must be safely absorbed by the grippers . Otherwise there will be register errors which make the print unusable.
  • the object of the invention is to provide a sheet gripper device of the type mentioned which enables the hard holding surface of the gripper tip to always align parallel to the printing material and the gripper support when the gripper is closed.
  • FIG. 1 shows a sheet gripper device for gripping and forwarding sheets 5.
  • a sheet gripper 2 with a gripper tip 3 is attached to a gripper shaft 1.
  • the sheet 5 is held non-positively between a gripper pad 4 and a holding surface on the gripper tip 3.
  • an inelastic pressure piece 6 is attached to the gripper tip 3 via an elastic intermediate layer 7.
  • Support is provided in the center of the holding surface by means of a knob 9 (see also FIG. 6).
  • the choice of the angle on the intermediate layer 7 always ensures that when the closing process is initiated, the holding surfaces are parallel to one another even with thick substrates.
  • FIG. 6 The choice of the angle on the intermediate layer 7 always ensures that when the closing process is initiated, the holding surfaces are parallel to one another even with thick substrates.
  • the holding surface of the gripper pad 4 is preferably made of a smooth, elastic material with a hardness of more than 90 ° Shore.

Abstract

A sheet gripper assembly for a sheet-fed rotary printing press having a gripper tip with a non-resilient pressure element fastened to the gripper tip by a layer of resilient material, the pressure element having a central protuberance, extending through the resilient layer, upon which the gripper tip bears.

Description

Die Erfindung betrifft eine Bogengreifereinrichtung an Bogenrotationsdruckmaschinen nach dem Oberbegriff des ersten Patentanspruchs.The invention relates to a sheet gripper device on sheet-fed rotary printing machines according to the preamble of the first claim.

Eine derartige Bogengreifereinrichtung ist aus der Veröffentlichung FR-A-2 345 377 bekannt: Es wird zwar ein unelastisches Druckstück über eine elastische Zwischenschicht an der Greiferspitze befestigt. Das unelastische Druckstück wird aber durch Glasfasern gebildet, die aus einer weichen Plastik herausragen und verformbar sind. Funktionell, fertigungs- und montagetechnisch bedingte Parallelitätsfehler sowie der Einfluß der Bedruckstoffstärke lassen sich durch eine solche harte Haltefläche nicht zuverlässig ausgleichen. Da der Bogen kraftschlüssig gehalten wird, kommt es stets auf ein einheitliches Tragebild an, insbesondere, wenn bei der Verarbeitung von glatten Bedruckstoffen und Druckfarben mit großer Zähigkeit bei hohen Maschinendrehzahlen bedeutende Zugkräfte auf den abzuziehenden Bogen einwirken, die von den Greifern mit Sicherheit aufgefangen werden müssen. Andernfalls entstehen Passerfehler, die den Druck unbrauchbar machen.Such a sheet gripper device is known from publication FR-A-2 345 377: an inelastic pressure piece is attached to the gripper tip via an elastic intermediate layer. The non-elastic pressure piece is formed by glass fibers that protrude from a soft plastic and are deformable. Functional, manufacturing and assembly related parallelism errors as well as the influence of the substrate thickness cannot be compensated for reliably by such a hard holding surface. Since the sheet is held non-positively, it is always important to have a uniform wearing pattern, especially if significant tractive forces act on the sheet to be removed when processing smooth printing materials and printing inks with high toughness at high machine speeds, which must be safely absorbed by the grippers . Otherwise there will be register errors which make the print unusable.

Aufgabe der Erfindung ist es, eine Bogengreifereinrichtung genannter Art zu schaffen, die es ermöglicht, daß sich die harte Haltefläche der Greiferspitze bei geschlossenem Greifer immer parallel zum Bedruckstoff und der Greiferauflage ausrichtet.The object of the invention is to provide a sheet gripper device of the type mentioned which enables the hard holding surface of the gripper tip to always align parallel to the printing material and the gripper support when the gripper is closed.

t Gelöst wird diese Aufgabe durch eine Vorrichtung entsprechend dem Kennzeichen des ersten Patentanspruchs. Eine Weiterbildung ergibt sich aus dem Unteranspruch. t Solved is this object by a device according to the characterizing clause of the first claim. Further training results from the subclaim.

Die Vorteile der erfindungsgemäßen Lösung bestehen darin, daß auch bei Vorhandensein von funktionellen, fertigungs- und montagetechnischen Parallelitätsfehlern immer eine planparallele Auflage der Greiferspitze auf der Greiferauflage erreicht wird, ohne den Einfluß der Bedruckstoffstärke durch eine Höhenverstellung ausgleichen zu müssen.The advantages of the solution according to the invention are that even in the presence of functional, manufacturing and assembly-related parallelism errors, a plane-parallel support of the gripper tip on the gripper support is always achieved without having to compensate for the influence of the substrate thickness by adjusting the height.

Ein Ausführungsbeispiel der Erfindung soll nachfolgend anhand einer Zeichnung näher beschrieben werden.An embodiment of the invention will be described below with reference to a drawing.

Es zeigen : Fig. 1 eine Bogengreifereinrichtung, schematisch,

  • Fig. 2 einen Schnitt der Halteflächen,
  • Fig. 3 eine Seitenansicht der Halteflächen,
  • Fig. 4 einen Schnitt der Halteflächen mit Pendellagerung,
  • Fig. 5 eine Einzelheit nach Fig. 4,
  • Fig. 6 den Schnitt A-A nach Fig. 5.
1 shows a sheet gripper device, schematically,
  • 2 shows a section of the holding surfaces,
  • 3 is a side view of the holding surfaces,
  • 4 shows a section of the holding surfaces with self-aligning bearings,
  • 5 shows a detail according to FIG. 4,
  • 6 shows section AA according to FIG. 5.

Die Fig. 1 zeigt eine Bogengreifereinrichtung zum Erfassen und zum Weiterleiten von Bogen 5. Auf einer Greiferwelle 1 ist ein Bogengreifer 2 mit Greiferspitze 3 befestigt. Der Bogen 5 wird zwischen einer Greiferauflage 4 und einer Haltefläche an der Greiferspitze 3 kraftschlüssig gehalten. Aus Fig. 2 ist zu ersehen, daß an der Greiferspitze 3 ein unelastisches Druckstück 6 über eine elastische Zwischenschicht 7 befestigt ist. Mittels eines Noppens 9 erfolgt eine Abstützung im Zentrum der Haltefläche (siehe auch Fig. 6). Durch die Wahl des Winkels an der Zwischenschicht 7 ist stets gewährleistet, daß bei Einleitung des Schließvorganges die Halteflächen auch bei dicken Bedruckstoffen parallel zueinander stehen. Wie aus Fig. 3 zu ersehen ist werden außerdem geringe Schiefstellungen von Greiferspitze 3 und Greiferauflage 4 durch die elastische Zwischenschicht 7 in Verbindung mit der Abstützung des Druckstückes durch den zentralen Noppen 9 ausgeglichen. Der Noppen 9 kann gemäß Fig. 4 und 5 zusätzlich innerhalb einer Führung 8 der Greiferspitze 3 pendelnd gelagert sein. Hierdurch wird eine zusätzliche Zentrierung erreicht. Insgesamt können von unterschiedlich dicken Bedruckstoffen ausgehende Funktionsfehler, Parallelitätsfehler sowie das Schieben der Greiferspitze zugleich vermieden werden. Während die Oberfläche des Druckstückes 6 mit einem körnigem Werkstoff von großer Härte belegt ist, beispielsweise Silicium- und Wolframcarbit sowie Korund und Molybdän, besteht die Haltefläche der Greiferauflage 4 vorzugsweise aus einem glatten elastischen Werkstoff mit einer Härte von mehr als 90° Shore.1 shows a sheet gripper device for gripping and forwarding sheets 5. A sheet gripper 2 with a gripper tip 3 is attached to a gripper shaft 1. The sheet 5 is held non-positively between a gripper pad 4 and a holding surface on the gripper tip 3. From Fig. 2 it can be seen that an inelastic pressure piece 6 is attached to the gripper tip 3 via an elastic intermediate layer 7. Support is provided in the center of the holding surface by means of a knob 9 (see also FIG. 6). The choice of the angle on the intermediate layer 7 always ensures that when the closing process is initiated, the holding surfaces are parallel to one another even with thick substrates. As can be seen from FIG. 3, slight misalignments of the gripper tip 3 and gripper support 4 are also compensated for by the elastic intermediate layer 7 in connection with the support of the pressure piece by the central knobs 9. 4 and 5, the knob 9 can additionally be mounted in a pendulum manner within a guide 8 of the gripper tip 3. Additional centering is achieved in this way. All in all, functional errors, parallelism errors and pushing of the gripper tip caused by substrates of different thicknesses can be avoided at the same time. While the surface of the pressure piece 6 is covered with a granular material of great hardness, for example silicon and tungsten carbite as well as corundum and molybdenum, the holding surface of the gripper pad 4 is preferably made of a smooth, elastic material with a hardness of more than 90 ° Shore.

BezugszeichenlisteReference symbol list

1 Greiferwelle1 gripper shaft

2 Bogengreifer2 bow grabs

3 Greiferspitze3 gripper tip

4 Greiferauflage4 gripper pad

5 Bogen5 sheets

6 Druckstück, unelastisch6 pressure piece, inelastic

7 Zwischenschicht, elastisch7 intermediate layer, elastic

8 Führung8 leadership

9 Noppen9 knobs

Claims (2)

1. Sheet gripper arrangement for rotary sheet printing presses in which an inelastic pressure piece (6) is fixed via an elastic interlayer (7) to a gripper tip (3) which cooperates with a holding surface arranged on a base member of a sheet gripper support (4), characterised in that the inelastic pressure piece (6) is constructed as a compact plate which is fixed via the elastic interlayer (7) to the gripper tip (3) and is supported on the gripper tip (3) by means of a boss (9) applied in the centre of the plate.
2. Sheet gripper arrangement according to Claim 1, characterised in that the boss (9) is centred in a guide (8) of the gripper tip (3).
EP86110487A 1985-08-19 1986-07-30 Gripper arrangement for sheet-fed rotary printing machines Expired EP0212365B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86110487T ATE38491T1 (en) 1985-08-19 1986-07-30 SHEET GRIPPER DEVICE FOR SHEET ROTARY PRINTING MACHINES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3529599 1985-08-19
DE19853529599 DE3529599A1 (en) 1985-08-19 1985-08-19 ARCH GRIPPER DEVICE FOR ARC ROTATION PRINTING MACHINES

Publications (3)

Publication Number Publication Date
EP0212365A2 EP0212365A2 (en) 1987-03-04
EP0212365A3 EP0212365A3 (en) 1987-10-21
EP0212365B1 true EP0212365B1 (en) 1988-11-09

Family

ID=6278810

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86110487A Expired EP0212365B1 (en) 1985-08-19 1986-07-30 Gripper arrangement for sheet-fed rotary printing machines

Country Status (5)

Country Link
US (1) US4823698A (en)
EP (1) EP0212365B1 (en)
JP (1) JPS6251447A (en)
AT (1) ATE38491T1 (en)
DE (1) DE3529599A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3914646A1 (en) * 1989-05-03 1990-11-08 Heidelberger Druckmasch Ag GRIPPER DEVICE ON ARC ROTATION PRINTING MACHINES
DE3921474A1 (en) * 1989-06-30 1991-01-10 Heidelberger Druckmasch Ag ARCH GRIPPER DEVICE FOR ARC ROTATION PRINTING MACHINES
EP0492138B1 (en) * 1990-12-21 1995-11-15 Heidelberger Druckmaschinen Aktiengesellschaft Quick clamping device
JP4753542B2 (en) * 2003-06-05 2011-08-24 ハイデルベルガー ドルツクマシーネン アクチエンゲゼルシヤフト Holding device for substrate processing machine
US7574958B2 (en) * 2004-09-08 2009-08-18 Heidelberger Druckmaschinen Ag Printing material sheet gripper and method for producing the sheet gripper
DE102008056239A1 (en) * 2007-11-29 2009-06-04 Heidelberger Druckmaschinen Ag Gripper for conveying a sheet by a printing machine
CN102529332B (en) * 2011-09-27 2014-09-24 北京印刷学院 Gripper sheet

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE493269C (en) * 1930-03-05 Mailaender Fa J G Grippers for printing cylinders for printing machines
US1642157A (en) * 1926-11-02 1927-09-13 Robert P Knox Gripper block for printing presses
GB1068514A (en) * 1963-05-03 1967-05-10 Headley Townsend Backhouse Improvements in or relating to suction grippers
DD125551A1 (en) * 1976-03-22 1977-05-04
US4203303A (en) * 1978-07-28 1980-05-20 The United States Of America As Represented By The United States Department Of Energy Torque-balanced vibrationless rotary coupling
DE7837025U1 (en) * 1978-12-14 1979-05-17 Roland Offsetmaschinenfabrik Faber & Schleicher Ag, 6050 Offenbach CLAMPING AND FASTENING DEVICE FOR ELEVATORS ON PRINTING MACHINE DRUMS
US4437942A (en) * 1980-07-10 1984-03-20 MDC Max Datwyler AG Methods for producing printing plates, and printing plates produced thereby
DD154083A1 (en) * 1980-11-17 1982-02-24 Arndt Jentzsch ARCH OVERALL DEVICE
US4377974A (en) * 1980-11-28 1983-03-29 David M Company Printing blanket holding bar
US4442772A (en) * 1982-10-26 1984-04-17 American Screen Printing Equipment Company Screen tensioning apparatus
CH653616A5 (en) * 1983-07-26 1986-01-15 De La Rue Giori Sa METHOD FOR FIXING AND ADJUSTING A PRINTING PLATE ON A PLATE-HOLDING CYLINDER AND DEVICE FOR IMPLEMENTING SAME.
DE3403893A1 (en) * 1984-02-04 1985-08-14 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach COUNTERPRINT CYLINDERS FOR A BOW OFFSETROTATION PRINTING MACHINE
DE3438931A1 (en) * 1984-10-24 1986-04-24 Heidelberger Druckmaschinen Ag, 6900 Heidelberg DEVICE FOR ADJUSTING A FLEXIBLE PRINT PLATE ON THE PLATE CYLINDER OF ROTARY PRINTING MACHINES

Also Published As

Publication number Publication date
US4823698A (en) 1989-04-25
JPS6251447A (en) 1987-03-06
ATE38491T1 (en) 1988-11-15
JPH0431515B2 (en) 1992-05-26
EP0212365A2 (en) 1987-03-04
EP0212365A3 (en) 1987-10-21
DE3529599A1 (en) 1987-02-26
DE3529599C2 (en) 1988-06-01

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