EP0212367A2 - Pince à ressort pour rotatives à feuille - Google Patents

Pince à ressort pour rotatives à feuille Download PDF

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Publication number
EP0212367A2
EP0212367A2 EP86110489A EP86110489A EP0212367A2 EP 0212367 A2 EP0212367 A2 EP 0212367A2 EP 86110489 A EP86110489 A EP 86110489A EP 86110489 A EP86110489 A EP 86110489A EP 0212367 A2 EP0212367 A2 EP 0212367A2
Authority
EP
European Patent Office
Prior art keywords
gripper
shaft
spring
finger
movement
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.)
Withdrawn
Application number
EP86110489A
Other languages
German (de)
English (en)
Other versions
EP0212367A3 (fr
Inventor
Valentin Gensheimer
Winfried Hartung
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 EP0212367A2 publication Critical patent/EP0212367A2/fr
Publication of EP0212367A3 publication Critical patent/EP0212367A3/fr
Withdrawn legal-status Critical Current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 resilient gripper for sheet-fed rotary printing machines according to the preamble of the first claim.
  • the grippers are designed in such a way that they can take up the pull that is exerted by the paper on the grippers via frictional connection. Since a slight pulling out of the paper from the gripper causes doubling or registration problems, one always tries to design the gripper with the maximum holding force.
  • the disadvantage is that at very high machine speeds and increased preload forces, depending on the bearing play on the gripper shaft and because of the relatively large masses and radii of inertia of the gripper reacts sluggishly. As a result of disturbing vibrations that are introduced into the machine, the gripper changes its position when centering the gripper tip.
  • a gripper is known in which the axis of the gripper finger joint is pivotally mounted in a swivel joint parallel to the gripper shaft, the axis of the gripper finger joint being located approximately on the straight line extending away from the gripper tip, which is the supporting surface for the hook tip connects to the axis of the hook shaft.
  • the geometry shown in FIG. 1 shows that the force exerted by the gripper tip on the gripper support continues to have a component in the direction of sheet travel. As a result, there is still a risk of the arc shifting, as well as a possible torsion of the gripper shaft under high pretensioning forces, although an improvement over conventional grippers with a circular movement about the gripper shaft axis can be achieved.
  • a vertically closing gripper with a controlled gripper shaft is known from DE-PS 2 030 040.
  • a disadvantage is the frictional control of the gripper shaft relative to the fulcrum of a control lever by means of a guide on a control cam.
  • the additional control effort leads to an increase in the inertial forces of the system vibrating with a large radius of inertia and thus to a reduction in the performance of the printing press.
  • the control cam is heavily soiled, it is no longer possible to guide the second vertical movement phase exactly.
  • the disadvantage is that the gripper finger must be assigned to a soft gripper pad and cumbersome settings are required on two adjusting screws in order to achieve an accurate transfer. The closing process is initiated improperly at higher machine speeds.
  • the invention has for its object to give the gripper finger in a gripper of the type mentioned in a second movement phase a positive movement approximately perpendicular to the gripper pad.
  • the advantages of the solution according to the invention are that regardless of contamination of the guide and a soft gripper pad without bulging the gripper tip, neither disturbing forces nor vibrations can have an effect in an extended speed range with increased pretensioning forces and pressures in the direction of sheet travel.
  • the holding effect is improved by an increased forced operation of the vertical closing process, whereby the gripper finger maintains its statically determined position and does not react so sluggishly.
  • the entire torque introduced into the gripper shaft is of benefit to the gripper holding force without branching of torque. This leads to lower control forces.
  • the path of the gripper tip can be easily varied by appropriate choice of the joint geometry and / or eccentric bearings of the gripper shaft.
  • a gripper control for a spring-loaded gripper provided on a concentrically mounted gripper shaft 5 is shown schematically via an asymmetrical four-bar linkage A, B, C, D of an arrangement in which a gripper is closed perpendicular to the sheet surface by a positively controlled positive movement.
  • the gripper movement according to FIG. 2 is controlled via a long lever arm C, D, which can also be replaced by a straight guide at C, and a short lever arm A, B which first lifts the gripper vertically, but then with increasing rotation a gripper tip 2 on Gripper finger 1 swings out of the bow.
  • a gripper shaft 5 mounted by means of eccentric bolts 27 is provided, the center of the bearing being indicated by “A” and the center of the gripper shaft 5 being indicated by “A", the gripper tip 2 can dispense with a section of the vertical movement phase more quickly be pivoted out of the sheet run, which results in advantages at higher machine speeds.
  • 5 to 8 show more detailed configurations of the grippers according to the invention.
  • 5 and 6 show a resilient gripper for sheet-fed rotary printing presses according to the principle of the gripper control shown schematically in FIGS. 1 and 2 by means of an asymmetrical four-bar linkage.
  • a gripper pad 3 is attached to the auxiliary rail 4 on the cylinder 26.
  • the gripper finger 1 with gripper tip 2 cooperating with the gripper support 3 is fastened on the gripper shaft 5 with a fixed axis and concentrically mounted and is moved in a second movement phase perpendicular to the gripper support 3 by means of an asymmetrical four-bar linkage A, B, C, D cushioned by a gripper closing spring 11 and pulled something out of the arch in a first movement phase pivots.
  • Adjusting rings 13 and a spacer 14 secure the axial position of long hinge plates 9, 25. These are rotatably arranged on a pin 18 on the gripper finger 1 and a support shaft 10 fastened on a mounting bracket 15 in order to additionally guide the gripper finger 1 with a long lever arm.
  • the gripper finger 1 is connected in an articulated manner to an annular driver 6 which is rotatably arranged on the gripper shaft 5 and is axially fixed by means of the adjusting ring 16.
  • the annular driver 6 is actuated by an annular control element 7, which is fixedly arranged on the gripper shaft 5, via an adjusting screw 8.
  • a screw 12 on the gripper closing spring 11 allows the gripper closing force to be adjusted.
  • a resilient gripper for sheet-fed rotary printing machines is shown, which allows the gripper tip 2 to be swiveled out of the sheet run faster without having to part of the vertical movement phase, without having to store the gripper shaft 6 eccentrically.
  • the gripper finger 1 with a short lever arm A, B is pivotally mounted by means of articulated brackets 21, 22 in a parallel swivel joint 17 about an upper support shaft 20 and the articulated brackets 9, 25 are indirectly via a deep-seated gripper shaft 5 arranged under the axis of the support shaft 20 Roller 23 and cam 19 controllable.
  • the short lever arm A, B can be designed with a swivel radius smaller than the radius of the gripper shaft 5.
  • the upper support shaft 20 is mounted on a mounting bracket 24 on the cylinder 26.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
EP86110489A 1985-08-19 1986-07-30 Pince à ressort pour rotatives à feuille Withdrawn EP0212367A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3529598 1985-08-19
DE19853529598 DE3529598A1 (de) 1985-08-19 1985-08-19 Federnder greifer fuer bogenrotationsdruckmaschinen

Publications (2)

Publication Number Publication Date
EP0212367A2 true EP0212367A2 (fr) 1987-03-04
EP0212367A3 EP0212367A3 (fr) 1987-11-04

Family

ID=6278809

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86110489A Withdrawn EP0212367A3 (fr) 1985-08-19 1986-07-30 Pince à ressort pour rotatives à feuille

Country Status (4)

Country Link
US (1) US4716828A (fr)
EP (1) EP0212367A3 (fr)
JP (1) JPS6251450A (fr)
DE (1) DE3529598A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0402615A2 (fr) * 1989-06-10 1990-12-19 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Pince pour feuilles dans des machines travaillant avec des feuilles

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4004352C1 (fr) * 1990-02-13 1991-06-06 Heidelberger Druckmaschinen Ag, 6900 Heidelberg, De
US5199352A (en) * 1990-02-24 1993-04-06 Komori Corporation Plate lock-up device for printing press
DE19816512B4 (de) * 1997-08-18 2008-08-28 Heidelberger Druckmaschinen Ag Bogengreifer in einer Bogenrotationsdruckmaschine
DE102014010753A1 (de) 2013-09-13 2015-03-19 Heidelberger Druckmaschinen Ag Vorrichtung zur Ausschleusung von Bogen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE445779C (de) * 1926-02-24 1927-06-18 Schnellpressenfabrik Act Ges H Vorrichtung zum Bewegen der Greifer an Haltzylinderschnellpressen
DE1212562B (de) * 1965-01-20 1966-03-17 Koenig & Bauer Schnellpressfab Rotierender Bogenzufuehrer an Druckmaschinen
GB1142018A (en) * 1965-06-10 1969-02-05 Adamovske Strojirny Np Improvements in or relating to rotary printing machines
DE1908181A1 (de) * 1969-02-19 1970-11-05 Roland Offsetmaschf Klemmgreifer fuer Bogenrotationsdruckmaschinen

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA559297A (fr) * 1958-06-24 Harris-Intertype Corporation Mecanisme de griffe
DD67992A (fr) *
DE1005981B (de) * 1955-03-21 1957-04-11 Roland Offsetmaschf Greifervorrichtung fuer Bogen verarbeitende Maschinen, insbesondere Druckmaschinen
DE1174804B (de) * 1962-06-26 1964-07-30 Planeta Veb Druckmasch Werke Bogengreifer an bogenverarbeitenden Maschinen
FR2056143A5 (fr) * 1969-07-10 1971-05-14 Polygraph Leipzig
JPS5441926A (en) * 1977-09-09 1979-04-03 Takashi Ishikawa Method of making inorganic light weight aggregate
DD142869A1 (de) * 1979-04-02 1980-07-16 Guenter Weisbach Schwingender,von unten arbeitender vorgreifer
DD143068A1 (de) * 1979-04-20 1980-07-30 Karl Marx Bogenrueckhaltesystem
GB2050312B (en) * 1979-05-29 1983-05-18 Metal Box Co Ltd Gripping mechanism for printing machine
DD154083A1 (de) * 1980-11-17 1982-02-24 Arndt Jentzsch Bogengreifereinrichtung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE445779C (de) * 1926-02-24 1927-06-18 Schnellpressenfabrik Act Ges H Vorrichtung zum Bewegen der Greifer an Haltzylinderschnellpressen
DE1212562B (de) * 1965-01-20 1966-03-17 Koenig & Bauer Schnellpressfab Rotierender Bogenzufuehrer an Druckmaschinen
GB1142018A (en) * 1965-06-10 1969-02-05 Adamovske Strojirny Np Improvements in or relating to rotary printing machines
DE1908181A1 (de) * 1969-02-19 1970-11-05 Roland Offsetmaschf Klemmgreifer fuer Bogenrotationsdruckmaschinen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0402615A2 (fr) * 1989-06-10 1990-12-19 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Pince pour feuilles dans des machines travaillant avec des feuilles
EP0402615A3 (fr) * 1989-06-10 1991-05-29 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Pince pour feuilles dans des machines travaillant avec des feuilles

Also Published As

Publication number Publication date
JPS6251450A (ja) 1987-03-06
US4716828A (en) 1988-01-05
EP0212367A3 (fr) 1987-11-04
DE3529598A1 (de) 1987-02-26

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