EP0563746B1 - Appareil pour retourner des feuilles dans une machine d'impression rotative - Google Patents

Appareil pour retourner des feuilles dans une machine d'impression rotative Download PDF

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Publication number
EP0563746B1
EP0563746B1 EP93104724A EP93104724A EP0563746B1 EP 0563746 B1 EP0563746 B1 EP 0563746B1 EP 93104724 A EP93104724 A EP 93104724A EP 93104724 A EP93104724 A EP 93104724A EP 0563746 B1 EP0563746 B1 EP 0563746B1
Authority
EP
European Patent Office
Prior art keywords
sheet
gripper
cylinder
impression cylinder
turning
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
EP93104724A
Other languages
German (de)
English (en)
Other versions
EP0563746A1 (fr
Inventor
Jürgen Münker
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.)
Koenig and Bauer AG
Original Assignee
Koenig and Bauer Albert 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 Koenig and Bauer Albert AG filed Critical Koenig and Bauer Albert AG
Publication of EP0563746A1 publication Critical patent/EP0563746A1/fr
Application granted granted Critical
Publication of EP0563746B1 publication Critical patent/EP0563746B1/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
    • B41F21/106—Combinations of transfer drums and grippers for reversing sheets, e.g. for perfecting machine
    • B41F21/108—Combinations of transfer drums and grippers for reversing sheets, e.g. for perfecting machine with pneumatic means

Definitions

  • the invention relates to a sheet turning device in a rotary printing press according to the preamble of claim 1.
  • a sheet releasing system is on a reversing drum of sheet-fed rotary printing machines which works on the principle of sheet trailing edge transfer known for optional perfecting and reverse printing cylinders.
  • the gripper system holding the sheet is moved in the cylinder rotation direction by a tilting device on the lateral surface of the cylinder, air being blown against the front edge of the sheet.
  • a disadvantage of this sheet release system is that the holding forces on the outer surface of the cylinder are so great that they hold the sheet on the outer surface of the cylinder. Due to the air outlet openings arranged in the vicinity of the gripper, the sheet is blown to the side, so that the blown air escaping does not cover the entire length of the sheet and thus does not completely loosen it.
  • the invention has for its object to provide a sheet turning device in a rotary printing press, which loosens the printed sheet to be transported on the lateral surface of the printing cylinder and passes it over to the reversing drum.
  • both the sheet is mechanically lifted at the beginning of the print and the way is cleared for the tangential direction of action of the air nozzles between the sheet and the outer surface of the printing cylinder, so that the sheet is completely relaxed.
  • the suction cups grasp the trailing edge of the sheet at a point in time at which the grippers are still effective ensures that the sheet is transferred to the turning drum in a manner that is appropriate to the register. Due to the temporal dimensioning of the blowing time to loosen the sheet, the sheet "floats" on the printing cylinder, so that the outside of the sheet printed with fresh ink does not smear. In the case of complicated detachment processes, for example in the case of sensitive or thin papers, the sheet can be ventilated by an additional blowing device at the other end of the sheet, so that even in such cases a secure sheet solution with high register accuracy is guaranteed.
  • Fig. 1 shows the partial view of a multi-color sheet-fed rotary printing press with a machine frame, which is designated overall by 1, with a feed table 2, a stop drum 3, an intermediate drum 4, a first printing cylinder 6, a turning drum 7 in a first printing unit 8 and a second Printing unit 9 with a second printing cylinder 11.
  • a blanket cylinder 12 In the first printing unit 8 there is also shown a blanket cylinder 12 and a plate cylinder 13.
  • the first pressure cylinder 6 has two gripper systems 14; 16, which are shown in FIG. 4 as an enlarged representation of the detail X and in FIG. 5 as an enlarged representation of the detail Y.
  • the details are X; Y shown in the horizontal.
  • Fig. 4 the gripper system 16 is shown in the pivoted state and in Fig. 5 in the idle state.
  • These gripper systems 14; 16 are each attached to a gripper bar 17 which extends in the axial direction of the pressure cylinder 6 and receives a number of grippers 18 which are connected to the gripper bar 17 via a gripper spindle 19 and bearing blocks 21.
  • the grippers 18 work against a gripper support 22 which extends in the axial direction and is fixedly connected to a support arm 23 which has a bearing point 24.
  • the gripper spindle 19 can be opened via a known roller lever 26 with cam roller 27 against a control cam 28 fixed to the frame.
  • the gripper support 22 has an air supply 29 and an air duct 31 extending in the axial direction, which ends directly below the gripper support 22 in air outlet openings 32, for example blown air nozzles of a known type.
  • a cam roller 33 which runs against a control cam 34 fixed to the frame and against the resistance of one in the cylinder channel 36 in guides 37; 38 arranged compression spring 39.
  • the first guide 37 is located on the upper side edge of the cylinder channel and the second guide 38 on the end 41 of the gripper bar 17.
  • the underside of the end 41 of the gripper bar 17 is against the stop 42 by the force of the spring 39 pressed.
  • the sheet turning device works as follows: According to FIG. 1, the cylinders and drums rotate in the direction of rotation provided with arrows.
  • the first pressure cylinder 6 is in the position in which a sheet 43 is just still held on its front edge 44 by means of the pivotable gripper system 16 shown in FIG. 4 and is already taken over on its rear edge 46 by the suction system 47 of the turning drum 7.
  • the pivoting of the gripper system 16 in the position according to FIG. 4 takes place by the cam roller 33 running in the direction of the arrow over the control cam 34 fixed to the frame.
  • the gripper system 16 thus pivots about the bearing point 24 at a pivot angle ⁇ .
  • the swivel angle ⁇ is 1 to 5 degrees.
  • the front edge 44 of the sheet 43 is moved back slightly as a result of the radius r around the bearing point 24 in the direction of the arrow B, and the air outlet openings 32 can release air in the tangential direction to the jacket 48 of the printing cylinder 6 between the sheet 43 and the jacket surface 48 of the printing cylinder 6 blow in the elbow 43.
  • the sheet 49 on the printing cylinder 6 is still partially in the printing position with the rubber cylinder 12.
  • the gripper system 14 is in the position shown in FIG. 5.
  • the pressure cylinder 6 has moved by a small angle in the direction of the arrow compared to the illustration in FIG. 1.
  • the gripper system 16 of the pressure cylinder 6 is just opening; the leading edge 44 of the sheet is thus released; the air has completely penetrated between arc 43 and cylinder surface 48.
  • the suction system 47 moves in the direction of the gripper system 51 of the turning drum 7 for the purpose of transferring the sheet 43.
  • Another sheet 53 is already on the way to the second pressure cylinder 11.
  • Blower device 52 is arranged, which extends in the axial direction.
  • This blowing device 52 is shown in FIG. 3 and blows air into a gap 50 between the sheet 43 and the jacket 48 of the printing cylinder 6 in the direction of the leading edge 44 of the sheet. This is particularly advantageous in the case of thin and smooth sheets of paper 43, since this is more difficult to do Allow the outer surface of the printing cylinder 6 to peel off compared to thicker paper sheets.

Landscapes

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

Claims (3)

  1. Dispositif pour retourner des feuilles dans une machine à imprimer rotative, dans lequel la feuille est transmise par des griffes qui sont disposées sur une barrette à griffes et qui font partie d'un premier cylindre d'impression, et le bord arrière de la feuille est saisi par des moyens d'aspiration d'un tambour de retournement voisin et transmis ensuite à un deuxième cylindre d'impression, caractérisé en ce qu'une barre porte-griffes (17 ; 22, 23) peut pivoter, autour d'un point d'appui (24), dans la direction radiale au-delà de la surface périphérique (48) du premier cylindre d'impression (6) selon un angle (α), et en ce que la barre porte-griffes (17 ; 22 ; 23) comporte des orifices de sortie d'air (32) qui agissent dans la direction tangentielle à la surface périphérique (48) du premier cylindre d'impression (6).
  2. Dispositif pour retourner des feuilles selon la revendication 1, caractérisé en ce que, au-dessus du premier cylindre d'impression (6) et du tambour de retournement (7), est disposé un dispositif soufflant (52) qui est parallèle aux axes de ceux-ci et solidaire du bâti et qui est orienté, en aval du déplacement, en direction d'un interstice (50) compris entre le premier cylindre d'impression (6) et le tambour de retournement (7).
  3. Dispositif pour retourner des feuilles selon les revendications 1 et 2, caractérisé en ce que le pivotement de la barre porte-griffes (17 ; 22 ; 23) s'effectue au moyen d'un mécanisme à came (26 ; 27 ; 28).
EP93104724A 1992-03-30 1993-03-23 Appareil pour retourner des feuilles dans une machine d'impression rotative Expired - Lifetime EP0563746B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4210327A DE4210327A1 (de) 1992-03-30 1992-03-30 Bogenwendeeinrichtung in einer Rotationsdruckmaschine
DE4210327 1992-03-30

Publications (2)

Publication Number Publication Date
EP0563746A1 EP0563746A1 (fr) 1993-10-06
EP0563746B1 true EP0563746B1 (fr) 1996-09-18

Family

ID=6455383

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93104724A Expired - Lifetime EP0563746B1 (fr) 1992-03-30 1993-03-23 Appareil pour retourner des feuilles dans une machine d'impression rotative

Country Status (4)

Country Link
US (1) US5271323A (fr)
EP (1) EP0563746B1 (fr)
JP (1) JPH0798394B2 (fr)
DE (2) DE4210327A1 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4424977C2 (de) * 1994-07-15 2000-08-10 Koenig & Bauer Ag Bogenabweiser
DE4424972C2 (de) * 1994-07-15 1998-03-19 Kba Planeta Ag Einrichtung an bogenführenden Zylindern
DE19800414C5 (de) * 1998-01-08 2005-06-30 Koenig & Bauer Ag Einrichtung zum Einwirken auf einen Bogen
DE19833901A1 (de) * 1998-07-28 2000-02-03 Heidelberger Druckmasch Ag Verfahren und Vorrichtung zur Übergabe der Hinterkante eines Bogens in einer Wendeeinrichtung einer Bogenrotationsdruckmaschine
US6104000A (en) * 1998-11-20 2000-08-15 Eastman Kodak Company Dual function air skive assembly for reproduction apparatus fuser rollers
EP1031418B1 (fr) * 1999-02-26 2003-07-30 Komori Corporation Dispositif de transport des objets sous forme de feuilles dans une machine à imprimer à feuilles
DE19933304A1 (de) * 1999-07-16 2001-01-25 Roland Man Druckmasch Anlegeeinheit für eine Bogenverarbeitungsmaschine
DE10040951A1 (de) * 1999-09-06 2001-03-08 Heidelberger Druckmasch Ag Druckmaschine mit Momentenausgleich
DE10310690A1 (de) * 2002-04-12 2003-10-30 Heidelberger Druckmasch Ag Bogenführungseinrichtung in einer bogenverarbeitenden Maschine
DE10315193A1 (de) * 2002-04-18 2003-10-30 Heidelberger Druckmasch Ag Gegendruckzylinder in einer Wendeeinrichtung einer bogenverarbeitenden Maschine
DE102005046097A1 (de) * 2005-09-27 2007-04-05 Heidelberger Druckmaschinen Ag Bewegbare Greiferbrücke
DE102006026667A1 (de) * 2006-06-08 2007-12-13 Koenig & Bauer Aktiengesellschaft Vorrichtung und Verfahren zum Leiten von Bogen in Druckmaschinen
DE102006032922B3 (de) * 2006-07-15 2007-09-27 Koenig & Bauer Aktiengesellschaft Einrichtung zur Unterstützung der Bogenführung in Druckmaschinen
US20090035046A1 (en) * 2007-07-31 2009-02-05 Belbey Jason S Print drum
DE102007061556B4 (de) * 2007-12-18 2011-06-09 Kba-Metronic Aktiengesellschaft Transportzylinder, mit beweglicher Greifervorrichtung und Verfahren zum Transportieren von Bögen
JP2013184758A (ja) * 2012-03-06 2013-09-19 Fuji Xerox Co Ltd 搬送装置、転写装置、画像形成装置
DE102020107838B4 (de) 2020-03-23 2023-05-11 Koenig & Bauer Ag Bogenverarbeitende Maschine mit einem Bogentrenner

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3768406A (en) * 1972-07-03 1973-10-30 Polygraph Leipzig Sheet gripper
DD101337A1 (fr) * 1972-12-11 1973-11-12
DE2354418C3 (de) * 1973-10-31 1980-04-17 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Bogenübergabetrommel für Druckmaschinen
DE2621250C2 (de) * 1976-05-13 1982-07-22 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Bogenabfragevorrichtung in einer Rotationsdruckmaschine
DE2724621A1 (de) * 1977-06-01 1978-12-14 Maschf Augsburg Nuernberg Ag Bogenwendevorrichtung einer bogen- rotations-druckmaschine in reihenbauart
DE2914362C3 (de) * 1979-04-09 1984-12-20 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Bogentransporttrommel an Rotationsdruckmaschinen
CH641112A5 (de) * 1979-10-17 1984-02-15 Grapha Holding Ag Anleger fuer druckbogen.
DE3529656A1 (de) * 1985-08-19 1987-02-26 Roland Man Druckmasch Federnder greifer fuer bogenrotationsdruckmaschinen
DE3529639A1 (de) * 1985-08-19 1987-02-26 Roland Man Druckmasch Federnder greifer fuer bogenrotationsdruckmaschinen
DE9210569U1 (de) * 1991-08-12 1992-11-12 Koenig & Bauer AG, 8700 Würzburg Trommel zum Transportieren von Bogen

Also Published As

Publication number Publication date
EP0563746A1 (fr) 1993-10-06
JPH068397A (ja) 1994-01-18
DE59303804D1 (de) 1996-10-24
DE4210327A1 (de) 1993-10-07
US5271323A (en) 1993-12-21
JPH0798394B2 (ja) 1995-10-25

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