EP0212365A2 - 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
EP0212365A2
EP0212365A2 EP86110487A EP86110487A EP0212365A2 EP 0212365 A2 EP0212365 A2 EP 0212365A2 EP 86110487 A EP86110487 A EP 86110487A EP 86110487 A EP86110487 A EP 86110487A EP 0212365 A2 EP0212365 A2 EP 0212365A2
Authority
EP
European Patent Office
Prior art keywords
gripper
sheet
rotary printing
fed rotary
tip
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
EP86110487A
Other languages
German (de)
French (fr)
Other versions
EP0212365A3 (en
EP0212365B1 (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 sheet gripper devices are generally known.
  • the disadvantage is that functional, manufacturing and assembly-related parallelism errors as well as the influence of the substrate thickness cannot be compensated for by the holding surfaces. Since the sheet is held in a force-fitting manner, it is particularly important to have a uniform wearing pattern if, when processing smooth substrates and printing inks with great toughness, particularly at high machine speeds, significant tensile forces occur on the sheet to be removed, which the grippers must surely have to absorb. otherwise there will be register errors that make the print unusable.
  • the object of the invention is to provide a sheet gripper device of the type mentioned, which makes it possible that the holding surface of the gripper tip is always aligned parallel to the printing material and the gripper support when the gripper is closed. This object is achieved by a device according to the characterizing part of the first claim. Further developments result from the subclaim, the description and the drawing.
  • the advantages of the solution according to the invention are that, even if there are 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.
  • 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.

Derartige Bogengreifereinrichtungen sind allgemein bekannt. Von Nachteil ist, daß funktionell, fertigungs-und montagetechnisch bedingte Parallelitätsfehler sowie der Einfluß der Bedruckstoffstärke durch die Halteflächen nicht ausgleichbar sind. Da der Bogen kraftschlüssig gehalten wird, kommt es auf ein einheitliches Tragebild besonders an, wenn bei der Verarbeitung von glatten Bedruckstoffen und Druckfarben mit großer Zähigkeit insbesondere bei hohen Maschinendrehzahlen bedeutende Zugkräfte auf den abzuziehenden Bogen auftreten, die von den Greifern mit Sicherheit aufgefangen werden müssen, da andernfalls Passerfehler entstehen, die den Druck unbrauchbar machen.Such sheet gripper devices are generally known. The disadvantage is that functional, manufacturing and assembly-related parallelism errors as well as the influence of the substrate thickness cannot be compensated for by the holding surfaces. Since the sheet is held in a force-fitting manner, it is particularly important to have a uniform wearing pattern if, when processing smooth substrates and printing inks with great toughness, particularly at high machine speeds, significant tensile forces occur on the sheet to be removed, which the grippers must surely have to absorb. otherwise there will be register errors that make the print unusable.

Aufgabe der Erfindung ist es, eine Bogengreifereinrichtung genannter Art zu schaffen, die es ermöglicht, daß sich die Haltefläche der Greiferspitze bei geschlossenem Greifer immer parallel zum Bedruckstoff und der Greiferauflage ausrichtet. Gelöst wird diese Aufgabe durch eine Vorrichtung entsprechend dem Kennzeichen des ersten Patentanspruchs. Weiterbildungen ergeben sich aus dem Unteranspruch, der Beschreibung und der Zeichnung.The object of the invention is to provide a sheet gripper device of the type mentioned, which makes it possible that the holding surface of the gripper tip is always aligned parallel to the printing material and the gripper support when the gripper is closed. This object is achieved by a device according to the characterizing part of the first claim. Further developments result from the subclaim, the description and the drawing.

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 if there are 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. The knob 9 can according to 4 and 5 can also be mounted in a pendulum manner within a guide 8 of the gripper tip 3. Additional centering is achieved in this way. Overall, malfunctions, 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.) Bogengreifereinrichtung für Bogenrotationsdruckmaschinen, bei der eine Greiferspitze eine aus unelastischem Material bestehende Haltefläche aufweist, und mit einer auf einem Grundkörper angeordneten Haltefläche einer Bogengreiferauflage zusammenwirkt, dadurch gekennzeichnet, daß ein unelastisches Druckstück (6) über eine elastische Zwischenschicht (7) an der Greiferspitze (3) befestigt und mittels eines Noppens (9) im Zentrum abgestützt ist.1.) sheet gripper device for sheet-fed rotary printing machines, in which a gripper tip has a holding surface made of inelastic material, and cooperates with a holding surface of a sheet gripper support arranged on a base body, characterized in that an inelastic pressure piece (6) has an elastic intermediate layer (7) on it Gripper tip (3) attached and supported by a knob (9) in the center. 2.) Bogengreifereinrichtung nach Anspruch 1, dadurch gekennzeichnet , daß der Noppen (9) in einer Führung (8) der Greiferspitze (3) zentriert ist.2.) sheet gripper device according to claim 1, characterized in that the knobs (9) in a guide (8) of the gripper tip (3) is centered.
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 true EP0212365A2 (en) 1987-03-04
EP0212365A3 EP0212365A3 (en) 1987-10-21
EP0212365B1 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)

Cited By (1)

* 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

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3921474A1 (en) * 1989-06-30 1991-01-10 Heidelberger Druckmasch Ag ARCH GRIPPER DEVICE FOR ARC ROTATION PRINTING MACHINES
ATE130252T1 (en) * 1990-12-21 1995-12-15 Heidelberger Druckmasch Ag QUICK CLAMP 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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1642157A (en) * 1926-11-02 1927-09-13 Robert P Knox Gripper block for printing presses
US3223442A (en) * 1963-05-03 1965-12-14 Headley Townsend Backhouse Suction grippers
FR2345377A1 (en) * 1976-03-22 1977-10-21 Polygraph Leipzig SHEET RETAINING ELEMENT, ESPECIALLY FOR PRINTING MACHINES

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
DE493269C (en) * 1930-03-05 Mailaender Fa J G Grippers for printing cylinders for printing machines
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1642157A (en) * 1926-11-02 1927-09-13 Robert P Knox Gripper block for printing presses
US3223442A (en) * 1963-05-03 1965-12-14 Headley Townsend Backhouse Suction grippers
FR2345377A1 (en) * 1976-03-22 1977-10-21 Polygraph Leipzig SHEET RETAINING ELEMENT, ESPECIALLY FOR PRINTING MACHINES

Cited By (2)

* 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
US5048815A (en) * 1989-05-03 1991-09-17 Heidelberger Druckmaschinen Ag Gripper device on sheet-fed rotary printing machines

Also Published As

Publication number Publication date
JPS6251447A (en) 1987-03-06
ATE38491T1 (en) 1988-11-15
JPH0431515B2 (en) 1992-05-26
EP0212365A3 (en) 1987-10-21
DE3529599A1 (en) 1987-02-26
EP0212365B1 (en) 1988-11-09
US4823698A (en) 1989-04-25
DE3529599C2 (en) 1988-06-01

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