EP0402615A2 - Pince pour feuilles dans des machines travaillant avec des feuilles - Google Patents

Pince pour feuilles dans des machines travaillant avec des feuilles Download PDF

Info

Publication number
EP0402615A2
EP0402615A2 EP90108551A EP90108551A EP0402615A2 EP 0402615 A2 EP0402615 A2 EP 0402615A2 EP 90108551 A EP90108551 A EP 90108551A EP 90108551 A EP90108551 A EP 90108551A EP 0402615 A2 EP0402615 A2 EP 0402615A2
Authority
EP
European Patent Office
Prior art keywords
gripper
finger
sheet
shaft
gripper finger
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
EP90108551A
Other languages
German (de)
English (en)
Other versions
EP0402615A3 (fr
EP0402615B1 (fr
Inventor
Rudolf Melzer
Norbert Korthals
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 AT90108551T priority Critical patent/ATE104212T1/de
Publication of EP0402615A2 publication Critical patent/EP0402615A2/fr
Publication of EP0402615A3 publication Critical patent/EP0402615A3/fr
Application granted granted Critical
Publication of EP0402615B1 publication Critical patent/EP0402615B1/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
    • B41F21/104—Gripper details

Definitions

  • the invention relates to a sheet gripper for sheet-processing machines according to the preamble of the first claim
  • Such a sheet gripper is known from DE-PS 3 623 405.
  • the disadvantage is that the circular movement of the sheet gripper with partial sinking of the gripper tip into the elastically deforming sheet material and possibly into the material of the gripper pad can result in a shift of the sheet between the gripper pad and sheet gripper. The precise transfer of the sheet between the sheet grippers of two cylinders is thus impaired.
  • a driver pin which is provided with plenty of play in the guides, bores or the like of the clamping piece and which is pinned to the lower end of the gripper finger, abruptly strikes when the upper support roller enters the straight guide, so that the closing process is initiated improperly.
  • a vertically closing gripping device with a controlled gripper shaft is known from DE-PS 2 030 040.
  • the disadvantage is non-positive control of the gripper shaft relative to the pivot point of a control lever by means of a guide on a control cam.
  • the considerable control effort leads to an increase in the inertial forces of a system vibrating with a large radius of inertia and thus to a reduction in the performance of the printing press.
  • a clamp gripper is known, the gripper fingers of which are moved in a substantially perpendicular manner to the cylinder surface when closed.
  • a disadvantage of this gripper is that the vertically guided gripper fingers between the cylinder wall and a guide bar are only loose, i.e. are not performed without play. At high machine speeds, only a few milliseconds are available for opening the grippers, and there are sudden loads that lead to vibration of the machine and unclean pressure. Vibrations of the gripper shaft have an effect on this gripper both perpendicular to the direction of sheet travel and horizontally, so that it is not possible to transfer the sheet in the correct position.
  • a resilient clamping gripper is known from DE-PS 3 529 639, which performs a vertical closing movement in a second movement phase, regardless of the presence of a soft gripper pad.
  • the disadvantage is that two springs must be precisely matched to each other in the spring force in order to avoid jerky movements during the opening and closing movement of the gripper.
  • the object of the invention is to develop the arch gripper specified at the outset in such a way that no sliding movement is carried out during the closing process, i.e. the position of the arch when the gripper is closed cannot be changed by the gripper itself.
  • the main advantage of the bow gripper according to the invention is that the lower end of the gripper finger is positively guided via a groove curve 23 and the gripper tip 6 can be brought into support practically in a linear movement perpendicular to the gripper support 13 or radially to the cylinder 1 before the placement process on the sheet.
  • a precise and play-free adjustment of the gripper finger 5 takes place in the manner of the catch fork effect immediately before the bow gripper is put on.
  • the entire sequence of movements thus takes place without being deflected by a stop. Therefore, no vibrations can occur on the gripper and the gripper control even at high speeds.
  • the spring force is almost fully brought into effect with only minor losses.
  • the vertical guidance of the lower end of the gripper finger 5 in the last phase of movement also prevents the deflection of the gripper shaft 3 and its circular movement from acting as a gripper displacement in the gripper tip 6. If the groove curve 25 is opened at the lower end of the gripper finger 5, the gripper finger 5 can be easily dismantled without having to dismantle the gripper shaft 3. Furthermore, the gripper is finely adjustable in the gripper bite (gripper holding force) and is therefore equipped with a precisely predetermined holding force for overpressing with different material thicknesses.
  • the spring force of the compression spring 9 has the effect that when the gripper finger 5 is closed and opened, the centering on the hinge pin 11 and on the rod 21, which is parallel to the gripper shaft 3, is not released.
  • the axial position of the gripper finger 5 remains in every phase of movement, i.e. also in the vertical movement phase precisely by guiding the side walls 15 of the box part 26 of the gripper finger 5 on the driver arm 7 fastened to the gripper shaft 3.
  • a gripper shaft 3 is pivotally mounted in the cylinder 1 with a fixed axis. The movement is controlled in a known manner via a roller lever, not shown, the roller of which cooperates with a cam disc, also not shown.
  • the gripper shaft 3 is in the Cylinder pit 2 stored in several bearing blocks 4.
  • the hook-shaped gripper finger 5 of the sheet gripper is formed in a central region between the gripper tip 6 and the lower end of the gripper finger 5 as a box part 26 open to the outside, between the side walls 15 of which a driver arm 7 of a driver lever, which is firmly connected to the gripper shaft 3 and is provided individually for each gripper finger 5 12 is included in part.
  • the driver lever 12 is clamped on the gripper shaft 3 by means of a screw 8.
  • a drive pin 11 is rotatably mounted in the box part 26 of the gripper finger 5 and is received in a groove curve 19 of the drive arm 7 of the drive lever 12, which is assigned to the gripper shaft pivot point 17 in radius r.
  • the inside of the side walls 15 of the gripper finger 5 serve on the driver arm 7 of the driver lever 12 as contact surfaces for fixing the axial position of the gripper finger 5.
  • the gripper finger 5 is non-positively connected to the driver lever 12 via a compression spring 9 and adjustable via an adjusting screw 10 which is inserted into a threaded bore the driver arm 7 is screwed.
  • the driving pin 11 lies in the groove curve 19 of the driving arm 7 on the adjusting screw 10 screwed into a threaded bore under the force of the compression springs 9.
  • the compression spring 9 is supported with one end on the driving pin 11 and with the other end - guided in the groove curve 19 - On a screw 14 of the driving arm 7.
  • the screw 14 on the compression spring 9 allows the gripper closing force to be adjusted.
  • the circular movement initiated by the gripper shaft 3 is superimposed by an additional movement with a straight guide component, which is generated by a further groove curve 23 at the lower end of the gripper finger 5.
  • the gripper finger 5 is guided in a precisely fitting manner through a rod 21, the axis 20 of which is arranged in a stationary manner in the cylinder 1 parallel to the gripper shaft pivot point 17 of the gripper shaft 3.
  • the groove curve 23 has a straight line in the radial direction of the cylinder 1 straight curve part 25 in the manner of a catch fork, so that when the gripper pad 13 is opened, the gripper fingers 5 are initially guided in the radial direction, ie perpendicular to the gripper pad 13.
  • This straight part 25 is followed by an arcuate part 24, so that the gripper finger 5 is then guided in an arc in one direction with a tangential component.
  • this process takes place in reverse order.
  • the individual phases of this movement sequence are illustrated in FIG. 3, the phases being identified by reference marks at the top right of the reference symbols.
  • a flat trajectory of the gripper finger 5 can also be generated, depending on the curve shape selected to quickly swivel the gripper tip 6 out of the sheet path when opening, the vertical lifting having been carried out beforehand over a short distance of approximately 2 mm.
  • the gripper finger 5 can be easily dismantled individually, the groove curve 23 on the arcuate part 24 must be passed through the edge of the gripper finger 5 so that a slot is created at the bottom. After loosening the driver pin 11, the gripper finger 5 can then be threaded out of its operating position.
  • the gripper pad 13 can be attached to the cylinder 1 by means of screw 16.
  • a recess 27 is also provided in the cylinder 1 in order to enable the gripper finger 5 to move freely.
  • the closing direction perpendicular to the gripper pad 13 is identified by 22 in FIG. 3.

Landscapes

  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Discharge By Other Means (AREA)
  • Advancing Webs (AREA)
EP90108551A 1989-06-10 1990-05-07 Pince pour feuilles dans des machines travaillant avec des feuilles Expired - Lifetime EP0402615B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90108551T ATE104212T1 (de) 1989-06-10 1990-05-07 Bogengreifer fuer bogenverarbeitende maschinen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3919088 1989-06-10
DE3919088A DE3919088A1 (de) 1989-06-10 1989-06-10 Bogengreifer fuer bogenverarbeitende maschinen

Publications (3)

Publication Number Publication Date
EP0402615A2 true EP0402615A2 (fr) 1990-12-19
EP0402615A3 EP0402615A3 (fr) 1991-05-29
EP0402615B1 EP0402615B1 (fr) 1994-04-13

Family

ID=6382556

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90108551A Expired - Lifetime EP0402615B1 (fr) 1989-06-10 1990-05-07 Pince pour feuilles dans des machines travaillant avec des feuilles

Country Status (3)

Country Link
EP (1) EP0402615B1 (fr)
AT (1) ATE104212T1 (fr)
DE (2) DE3919088A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10336715A1 (de) 2002-09-06 2004-03-18 Heidelberger Druckmaschinen Ag Greifereinrichtung in einer bogenverarbeitenden Maschine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2030040A1 (fr) * 1969-06-20 1970-12-23 Miller Printing Machinery Co
DE3130689A1 (de) * 1980-11-17 1982-07-01 VEB Kombinat Polygraph "Werner Lamberz" Leipzig, DDR 7050 Leipzig Bogengreifereinrichtung
EP0212367A2 (fr) * 1985-08-19 1987-03-04 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Pince à ressort pour rotatives à feuille
EP0261412A2 (fr) * 1986-09-26 1988-03-30 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Pince pour machines rotatives à feuilles

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD67992A (fr) *
DE488949C (de) * 1930-01-11 Albert Schnellpressen Senkrecht zu der Greiferunterlage bewegliche Zylindergreifer
DE3529639A1 (de) * 1985-08-19 1987-02-26 Roland Man Druckmasch Federnder greifer fuer bogenrotationsdruckmaschinen
DE3623405A1 (de) * 1986-07-11 1988-02-04 Miller Johannisberg Druckmasch Bogengreifer fuer bogenverarbeitende maschinen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2030040A1 (fr) * 1969-06-20 1970-12-23 Miller Printing Machinery Co
DE3130689A1 (de) * 1980-11-17 1982-07-01 VEB Kombinat Polygraph "Werner Lamberz" Leipzig, DDR 7050 Leipzig Bogengreifereinrichtung
EP0212367A2 (fr) * 1985-08-19 1987-03-04 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Pince à ressort pour rotatives à feuille
EP0261412A2 (fr) * 1986-09-26 1988-03-30 M.A.N.-ROLAND Druckmaschinen Aktiengesellschaft Pince pour machines rotatives à feuilles

Also Published As

Publication number Publication date
DE59005315D1 (de) 1994-05-19
DE3919088A1 (de) 1990-12-13
ATE104212T1 (de) 1994-04-15
EP0402615A3 (fr) 1991-05-29
EP0402615B1 (fr) 1994-04-13

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