EP0709186B1 - Vorgreifer für Bogenrotationsdruckmaschinen - Google Patents

Vorgreifer für Bogenrotationsdruckmaschinen Download PDF

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Publication number
EP0709186B1
EP0709186B1 EP95116071A EP95116071A EP0709186B1 EP 0709186 B1 EP0709186 B1 EP 0709186B1 EP 95116071 A EP95116071 A EP 95116071A EP 95116071 A EP95116071 A EP 95116071A EP 0709186 B1 EP0709186 B1 EP 0709186B1
Authority
EP
European Patent Office
Prior art keywords
pregripper
apex
gripper
hollow cylinder
axis
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
EP95116071A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0709186A1 (de
Inventor
Harald Bayer
Klemens Kemmerer
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
Publication of EP0709186A1 publication Critical patent/EP0709186A1/de
Application granted granted Critical
Publication of EP0709186B1 publication Critical patent/EP0709186B1/de
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
    • B41F21/04—Grippers
    • B41F21/05—In-feed grippers

Definitions

  • the invention relates to a pre-gripper for sheet-fed rotary printing machines, that of the precisely fitting sheet transfer of an aligned one Bow is used on a system drum or a printing cylinder.
  • the pre-gripper is suitable for the transport of substrates in the form of paper, cardboard or sheet metal.
  • a pre-gripper of this type is known from DE-AS 2 156 577. He consists essentially of a cylindrical tube on which Brackets are releasably connected, which carry the gripper bridges.
  • a disadvantage of these designs is that at higher machine speeds and higher requirements on the registration Bending and torsional moments negatively affect print quality impact.
  • Another disadvantage is the complex assembly. So must among other things, with a pre-gripper disassembly of the drive lever from Pre-gripper tube are dismantled to remove the tube.
  • the object of the invention is to develop a solution that high bending and torsional rigidity to achieve a high Fits in register and preferably requires little assembly or disassembly owns.
  • the task is solved by the characterizing part of the main claim. Further training results from the subclaims.
  • the solution according to the invention provides a flexurally and torsionally rigid Pre-gripper that is easy to assemble at the same time.
  • the bending and Torsionally rigid training ensures high register stability and thereby improves the print quality. Compared to previous ones Versions reduces the number of parts and the execution is easy to assemble.
  • the axis of inertia is preferably on the axis of rotation of the pre-gripper.
  • the pre-gripper is in its cross section formed as a hollow cylinder oval (oval), the The crossbar carrying the gripper bar preferably with the hollow cylinder represents a component.
  • the hollow cylinder communicating several in the axial direction Have breakthroughs. These breakthroughs can also be made in the jetty or the gripper bar be arranged.
  • the oval hollow cylinder is preferably made of aluminum or it is Aluminum as a material contained in the hollow cylinder.
  • Another Mass reduction is achieved when the hollow cylinder is designed made of a carbon fiber material (CFRP).
  • a system 1 is arranged in a sheet-fed rotary printing press.
  • a vibrating pre-gripper is arranged below the system 1.
  • the pre-gripper consists of an oval hollow cylinder 7, which in the Cross section a vertex 8 with maximum curvature and one Vertex 15 with less in relation to vertex 8 Has curvature.
  • the wall thickness of the egg-shaped hollow cylinder 7 seen in cross-section takes from vertex 8 to vertex 15 towards.
  • a web 3 is arranged near the apex 8, which carries a gripper bar 2.
  • the web 3 is a gripper shaft 4 adjacent which has a plurality of grippers 5 wearing.
  • Gripper impact bar 2, gripper shaft 4 and the grippers 5 form a gripper bridge in a known manner.
  • An axis of rotation 9 is arranged adjacent to the apex 15, on which the pre-gripper's axis of inertia lies at the same time.
  • the gripper is in the axis of rotation due to its oval hollow cylinder 7 9 with one each in the machine frame 11 of the printing press Center bearing pin 10 centered and detachable with screws connected.
  • the hollow cylinder 7 faces each in the axial direction Front (base and top surface of the hollow cylinder) a flat surface 14 on a flat surface 14 'of the respective journal 10 is assigned.
  • the hollow cylinder points in the radial direction each end face a centering 13, the one circumferential Centering 13 'of the respective journal 10 is assigned.
  • the Bearing journals 10 are each in a bearing 12 of the respective machine frame 11 recorded and protrude into the space between the two Machine frames 11 in the direction of one end of the Hollow cylinder 7.
  • Hollow cylinder 7 and the journal 10 are through several connecting elements, e.g. Screws, releasably form-fitting connected, which is indicated in Fig. 2 by the chain lines is.
  • a pre-gripper is shown in its hollow cylinder 7 openings 16 has.
  • the Web 3 or the gripper bar 2 also openings 16 exhibit.
  • the openings 16 serve to avoid a dynamic pressure or negative pressure between the pre-gripper and the substrate can build or dismantle.
  • the pressure conditions can compensated by the air flow 17 flowing through the openings 16 be what improves the sheet guidance.
  • the swinging Pre-gripper takes over from the front brands in a more familiar way Way the sheet fed via the system 1 in the conveying direction 6 and passes it, accelerated to press speed, to a feed drum for further transport to a printing cylinder.

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)
EP95116071A 1994-10-29 1995-10-12 Vorgreifer für Bogenrotationsdruckmaschinen Expired - Lifetime EP0709186B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4438757 1994-10-29
DE4438757A DE4438757C2 (de) 1994-10-29 1994-10-29 Vorgreifer für Bogenrotationsdruckmaschinen

Publications (2)

Publication Number Publication Date
EP0709186A1 EP0709186A1 (de) 1996-05-01
EP0709186B1 true EP0709186B1 (de) 1998-04-22

Family

ID=6532058

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95116071A Expired - Lifetime EP0709186B1 (de) 1994-10-29 1995-10-12 Vorgreifer für Bogenrotationsdruckmaschinen

Country Status (5)

Country Link
US (1) US5575209A (ja)
EP (1) EP0709186B1 (ja)
JP (1) JP2918094B2 (ja)
AT (1) ATE165276T1 (ja)
DE (2) DE4438757C2 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10332672A1 (de) * 2003-07-18 2005-02-10 Koenig & Bauer Ag Vorgreifer in bogenverarbeitenden Maschinen

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19753137C1 (de) * 1997-11-29 1998-10-15 Roland Man Druckmasch Bogenführungseinrichtung im Bereich von Greifersystemen einer Druckmaschine
DE10023669C1 (de) * 2000-05-16 2001-06-28 Roland Man Druckmasch Steuervorrichtung für Vorgreifergreifer eines Vorgreifers in einer Bogenverarbeitungsmaschine

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE614043C (de) * 1933-01-29 1935-05-31 Vomag Betr S A G Bogenanlegevorrichtung fuer Druckmaschinen
DE739377C (de) * 1938-05-20 1943-09-25 Planeta Druckmaschinenwerk Ag Verfahren zum passgerechten Ausrichten und Anlegen von Bogen an umlaufende Zylinder, insbesondere von Druckmaschinen
US2220046A (en) * 1938-12-10 1940-10-29 Lang Karl Theodor Sheet feeding device
GB676218A (en) * 1949-03-04 1952-07-23 Miehle Printing Press & Mfg Method of transferring lapped sheets
US3647205A (en) * 1970-05-15 1972-03-07 Polygraph Leipzig Method and apparatus for feeding of sheets fittingly aligned to a machine
DE2156577B2 (de) * 1971-11-15 1974-07-04 Roland Offsetmaschinenfabrik Faber & Schleicher Ag, 6050 Offenbach Vorgreiferschwinganlage
DE3529596A1 (de) * 1985-08-19 1987-02-26 Roland Man Druckmasch Federnder greifer fuer bogenrotationsdruckmaschinen
DE4127713C2 (de) * 1991-08-22 1996-03-21 Koenig & Bauer Albert Ag Greifer für Bogenrotationsdruckmaschinen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10332672A1 (de) * 2003-07-18 2005-02-10 Koenig & Bauer Ag Vorgreifer in bogenverarbeitenden Maschinen

Also Published As

Publication number Publication date
EP0709186A1 (de) 1996-05-01
ATE165276T1 (de) 1998-05-15
JPH08207246A (ja) 1996-08-13
DE4438757C2 (de) 1997-09-11
JP2918094B2 (ja) 1999-07-12
DE4438757A1 (de) 1996-05-02
US5575209A (en) 1996-11-19
DE59501980D1 (de) 1998-05-28

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