EP0203553B1 - Greifersystem - Google Patents

Greifersystem Download PDF

Info

Publication number
EP0203553B1
EP0203553B1 EP86107067A EP86107067A EP0203553B1 EP 0203553 B1 EP0203553 B1 EP 0203553B1 EP 86107067 A EP86107067 A EP 86107067A EP 86107067 A EP86107067 A EP 86107067A EP 0203553 B1 EP0203553 B1 EP 0203553B1
Authority
EP
European Patent Office
Prior art keywords
gripper
spindle
gas pressure
grippers
pressure spring
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
EP86107067A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0203553A3 (en
EP0203553A2 (de
Inventor
Johannes Georg Schaede
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 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 AG filed Critical Koenig and Bauer AG
Publication of EP0203553A2 publication Critical patent/EP0203553A2/de
Publication of EP0203553A3 publication Critical patent/EP0203553A3/de
Application granted granted Critical
Publication of EP0203553B1 publication Critical patent/EP0203553B1/de
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 gripper system for preferably a cylinder of a sheet-fed rotary printing press, according to the preamble of claim 1. (DE-A-2 836 087).
  • DE-A-2 836 087 shows a gripper with a gripper tip which is fastened to a pivotable gripper spindle by means of a clamp.
  • the gripper is pivoted relative to the clamp and is supported on the clamp by means of a compression spring.
  • DE-B-1 100 043 shows a drive for grippers of printing machines.
  • the grippers are driven by a rack and pinion gear.
  • the rack has a piston at one end, which together with a cylinder forms a pneumatic work unit.
  • a return spring is provided between the piston and the cylinder base, which causes a gripper opening movement.
  • One-piece grippers for cylinders or drums of rotary printing machines have become known, for example, from DE-C-2 725 035.
  • a one-piece gripper with a gripper tip is described, which is fastened directly to a swiveling gripper spindle by means of a screw and is pivotably supported thereon.
  • the swivel path of the grippers is determined by a, usually one-sided, cam-roller lever combination.
  • the previous grippers are generally “rigid Hook systems (Fig. 9). With such grippers, small deviations in the deflection path ⁇ X mean large deviations in the gripper contact force ⁇ F A (FIG. 9).
  • the gripper contact force F A is set depending on the deflection path X. Due to the torsion of the gripper shaft, caused by the sum of the individual gripper bearing forces, and by inaccuracies when setting the individual grippers, the deflection paths X of the individual grippers are of course different. Are desirable now gripper that is, the gripper pad force F A would be independent of the deflection paths X "with a spring characteristic", which is for a short fürfederungsweg X 1 very "stiff" and merges at a desired contact force F A target (X i) in a horizontal line, (Fig. 9 dash-dotted line).
  • the invention has for its object to provide a gripper system for sheet-fed rotary printing machines, in which the spring force of the gripper can be designed such that the force increase is relatively steep for a very short distance when the gripper strikes the gripper pad. H. the contact force increases and then a relatively horizontal spring characteristic comes into play, so that the contact force is almost independent of the deflection path.
  • a gripper spindle 1 consists of a tube 2.
  • the gripper spindle 1 is rotatably supported at its two ends in bearings 5 in a pit of a rubber or transfer cylinder 10 in a known manner.
  • a roller lever (not shown) is attached to drive it.
  • the gripper spindle 1 is over a circumference of, for. B. 110 ° each with a recess 4.
  • the recess 4 ends in an extension 6.
  • This extension 6 is wider than a length of a gripper bearing shaft 7 of the gripper 3. This extension 6 enables the gripper 3 to be easily removed from the gripper spindle 1 or installed in the gripper spindle 1.
  • V-shaped receptacles 8 are incorporated in the interior of the tube 2.
  • Receptacles 8 and gripper bearing shaft 7 each form a bearing point in which the gripper 3 can be pivoted.
  • Inside the tube 2 of the gripper spindle 1 is an elastic, pressure-resistant ter hose 9 arranged.
  • An outer diameter D of the tube 9 corresponds approximately to an inner diameter d of the tube 2.
  • the tube 2 can at both ends 11, in the manner such. B. shown in Fig. 4, sealed.
  • a cover 12 is screwed onto both ends 11 of the tube 2.
  • the covers 12 each have a check valve 13 which open into an interior 14 of the hose 9.
  • the ends 11 of the tube 2 are each provided with a circular recess 16.
  • These punctures 16 serve as receptacles for an annular bead 17 at both ends of the hose 9.
  • the hose 9 is filled with compressed air via the check valve 13 and acts in the gas-filled state as a prestressed gas pressure spring.
  • a gripper foot 33 of the gripper 3 reaches through the recess 4 and is supported on the hose 9 (gas pressure spring 9).
  • Each of the one-piece grippers 3 is provided with an adjusting device 18 or 19 for changing an angular position a of a gripper tip 23 of the gripper 3 around the gripper bearing shaft 7.
  • the gripper tip 23 can hereby be adjusted to the associated gripper support 15.
  • the setting device 18 consists of a threaded bore 21 and a grub screw 22 which can be screwed into and out of it.
  • the threaded bore 21 is located near a gripper tip 23.
  • the adjusting device 19 for the gripper 3 consists of a threaded bore 24 in the tube 2, a screw 26 screwed into the threaded bore 24, a spring cup 27 placed on the screw 26 and a compression spring 29 supported between the tube 2 and a spring cup base 28
  • Wall 31 of the spring cup 27 is supported on one end 32 of the gripper foot 33 of the gripper 3.
  • the remaining part of the wall 31 has a non-positive connection with the tube 2 only via the compression spring 29 (FIG. 7).
  • the hose 9 sealed at both ends within the tube 2 thus forms a gas pressure spring in which the deformation path is small in relation to the enclosed gas volume.
  • gas springs With a frictionless isentropic (adiabatic) compression, gas springs almost ideally show the behavior desired for grippers.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Manipulator (AREA)
EP86107067A 1985-05-30 1986-05-23 Greifersystem Expired EP0203553B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853519293 DE3519293A1 (de) 1985-05-30 1985-05-30 Greifersystem
DE3519293 1985-05-30

Publications (3)

Publication Number Publication Date
EP0203553A2 EP0203553A2 (de) 1986-12-03
EP0203553A3 EP0203553A3 (en) 1987-09-23
EP0203553B1 true EP0203553B1 (de) 1989-08-09

Family

ID=6271944

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86107067A Expired EP0203553B1 (de) 1985-05-30 1986-05-23 Greifersystem

Country Status (3)

Country Link
EP (1) EP0203553B1 (enrdf_load_stackoverflow)
JP (1) JPH07102678B2 (enrdf_load_stackoverflow)
DE (2) DE3519293A1 (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4221929C2 (de) * 1992-07-03 1997-11-20 Heidelberger Druckmasch Ag Greifersteuerung für Bogengreifer an einem bogenführenden Zylinder oder dergleichen in einer Druckmaschine
EP0600183B1 (de) * 1992-12-02 1997-05-21 Ferag AG Greifer für eine Fördereinrichtung zum Fördern von ein- oder mehrblättrigen Druckereierzeugnissen
DE19927695A1 (de) 1998-07-06 2000-01-13 Heidelberger Druckmasch Ag Greifer für einen bogentransportierenden Zylinder oder Trommel einer Rotationsdruckmaschine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1100043B (de) * 1958-08-15 1961-02-23 Leipziger Buchbindereimaschine Greifer an Druck- und Buchbinderei-Maschinen zum Erfassen und Festhalten von Bogen aus Papier, Pappe oder aehnlichem Material
JPS52105009A (en) * 1976-02-26 1977-09-03 Komori Printing Mach Paper gripper for sheet printing machine
DE2725035C3 (de) * 1977-06-03 1979-11-22 Koenig & Bauer Ag, 8700 Wuerzburg Greifer
ES230780Y (es) * 1977-08-26 1978-07-01 Conjunto de pinza y abrazadera para el transporte de laminasen maquinas litograficas.

Also Published As

Publication number Publication date
DE3664882D1 (en) 1989-09-14
JPH07102678B2 (ja) 1995-11-08
EP0203553A3 (en) 1987-09-23
JPS61277454A (ja) 1986-12-08
EP0203553A2 (de) 1986-12-03
DE3519293A1 (de) 1986-12-04
DE3519293C2 (enrdf_load_stackoverflow) 1989-04-20

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