EP0545237A1 - Unité d'encrage pour une machine d'impression, particulièrement machine d'impression offset pour feuilles - Google Patents

Unité d'encrage pour une machine d'impression, particulièrement machine d'impression offset pour feuilles Download PDF

Info

Publication number
EP0545237A1
EP0545237A1 EP92120031A EP92120031A EP0545237A1 EP 0545237 A1 EP0545237 A1 EP 0545237A1 EP 92120031 A EP92120031 A EP 92120031A EP 92120031 A EP92120031 A EP 92120031A EP 0545237 A1 EP0545237 A1 EP 0545237A1
Authority
EP
European Patent Office
Prior art keywords
inking unit
printing
clutch
inking
friction
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
EP92120031A
Other languages
German (de)
English (en)
Other versions
EP0545237B1 (fr
Inventor
Stephan Kanzler
Willi Herbert
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 EP0545237A1 publication Critical patent/EP0545237A1/fr
Application granted granted Critical
Publication of EP0545237B1 publication Critical patent/EP0545237B1/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
    • B41F31/00—Inking arrangements or devices
    • B41F31/15—Devices for moving vibrator-rollers

Definitions

  • the invention relates to an inking unit for a printing press, in particular a sheet-fed offset printing press according to the preamble of claim 1.
  • the ink to be printed is fed via an ink fountain interacting with an ink fountain roller and a metering device (e.g. a large number of zone-wide ink metering elements); a siphon roller and a number of inking rollers on the printing plate stretched around a cylinder.
  • a metering device e.g. a large number of zone-wide ink metering elements
  • a siphon roller e.g. a large number of zone-wide ink metering elements
  • the friction rollers in an inking unit of the present invention are axially movable back and forth via their journals in the frame walls of the printing press and are connected to a distribution drive.
  • the friction drive is, for example, a transmission which converts the rotary movement of a gear wheel rigidly connected to the plate cylinder via a crank mechanism whose stroke is adjustable and via further linkages into a corresponding reciprocating movement (EP 0 000 329 A1, DD-PS 113 718).
  • cam mechanisms DE 3 424 721 C2
  • gears with swash plates can also be provided.
  • the stroke as well as the point of use of a lateral rubbing generated in this way is determined by the Printer adjusted according to the subject of the printing plate (ink drop in printing direction).
  • the paper inlet into the machine must first be blocked in the case of a faulty sheet system and then the printing unit must be switched off after the sheet that has last properly entered the machine.
  • the inking rollers stored in the appropriate suspensions are switched off by the plate cylinder and the clocking movement of the lifting roller is interrupted. With such stoppers, the speed of rotation of the printing press can also be automatically reduced. Due to the large number of splitting processes, the lateral rubbing and the lack of ink supply / ink take-off, the ink layer thicknesses are compensated for both in and across the printing direction during printing-free operation.
  • inking unit In the upper part of the inking unit, there is a color balance between ink metering zones with large and small ink layer thicknesses.
  • a large number of sheets e.g. pre-run waste
  • the first printed sheets after a stopper thus have strongly pivoting color density gradients across the format width.
  • Ink flow separation means that with "Printing from” the ink flow in the inking unit is interrupted at some points by separating the corresponding inking unit rollers. The ink layer thickness compensation then takes place only within a reduced number of inking unit rollers.
  • Such a color flow separation is described, for example, in “Technology of Offset Printing", VEB subuchverlag Leipzig 1989, from page 223 described. Color flow separation, however, prevents compensation of the ink layer thicknesses only in the direction of the inking unit.
  • the object of the present invention is thus to improve an inking unit for printing machines in accordance with the preamble of claim 1 in such a way that the number of waste sheets after a stopper can be reduced using simple means.
  • the invention is provided to interrupt the lateral rubbing during a stopper by using a shift clutch assigned to the rubbing drive.
  • this clutch can cause the friction rollers to remain in the reverse position of the traversing movement.
  • the release device that actuates the clutch.
  • it can be linked directly with the "Print on / down" command or with the switch-on and switch-off devices of the inking rollers - mostly pneumatic cylinders.
  • the clutch is assigned to the input-side drive wheel of the friction drive and is designed in such a way that this drive wheel can be disengaged on a shaft in a specific angle of rotation position.
  • a clutch is advantageously achieved by a form-fitting design of the coupling parts to each other.
  • the form-fitting design of the coupling parts is such that the re-engagement takes place only when the coupling parts are at a certain angle of rotation. This ensures in a simple manner that after a stopper lateral rubbing is continued in phase with respect to the printing unit position.
  • Suitable triggering devices are, for example, electromagnetic devices or devices that become effective when hydraulic fluid is applied - hydraulically / pneumatically. The latter devices are expediently actuated by electrically switchable solenoid valves.
  • the clutch can also have a pre-synchronization so that when the triggering device is actuated, the one clutch part is first taken along by the other clutch part by frictional engagement and only then does it engage in a positive and correct phase.
  • the times for actuating the triggering device that is to say engaging or disengaging the clutch, can take place at those times of movement of the friction drive in which the lowest drive torques prevail.
  • the shift clutches outlined above in terms of structure and function, which can be used in the present invention, are known, for example, from DE 2 854 032 A1 and have two toothed disks which are correspondingly toothed to one another, one toothed disk being axially displaceable relative to the other.
  • Switching clutches which can be actuated electromagnetically and have toothed disks are widely used in sheet-fed printing machines and are used, for example, for coupling and uncoupling the sheet feeder (sheet transport) to the drive of the printing press.
  • an inking unit there is no lateral rubbing with a stopper.
  • the ink layer thickness profile located on the inking unit rollers transversely to the printing direction is therefore not rubbed during the stopper.
  • the continuous inking unit rollers and the large number of splitting processes also result in an ink cross flow between the zones with high and those with a lower ink layer thickness, this remains the case Ink layer thickness profile obtained transversely to the printing direction with the friction drive switched off considerably longer than with further rubbing movements.
  • the first friction roller following the lifting roller in particular has large ink layer thickness differences, ie a correspondingly significant ink layer thickness profile, which would degrade in a relatively short time if there were further rubbing movements during a stop.
  • the present invention can be applied to inking units with or without devices for ink flow separation.
  • a printing press inking unit with a plurality of friction drives for a plurality of friction rollers provision can likewise be made for only the topmost friction roller (first friction roller) to be stopped with a stopper.
  • Fig. 2 shows the friction drive of a friction roller 1 of an inking unit, not shown.
  • the friction roller 1 is mounted with its pin 2 axially back and forth in the side walls of the printing machine, not shown here.
  • On a pin 2 is an arm of a via a transmission ring 3 with an elongated cross section, which engages in a corresponding annular groove of the pin 2
  • Angle lever 4 articulated.
  • Angle lever 4 is pivotally mounted on the frame with an axis which is perpendicular to that of the friction roller.
  • a rod 5 is rotatably articulated on a second arm of angle lever 4, for example by means of a fork-shaped end. The other end of the rod 5 is articulated on a crank wheel 6 of the friction drive.
  • the crank wheel 6 has an elongated slot 7 in the radial direction, in which the end of the rod 5 articulated on the crank wheel 6 can be displaced when the locking screw 8 is loosened.
  • the friction drive shown can also drive several friction rollers 1 via special mechanisms.
  • a drive wheel 9 of the friction drive is coaxially assigned to the crank wheel 6 of the friction drive, which meshes, for example, directly with a gearwheel 10 attached to the plate cylinder (not shown here) (FIG. 1). So that not only the stroke but also the time of use for the lateral rubbing is adjustable, the drive wheel 9 can be rotated relative to the crank wheel 6, for example after loosening screws or similar locking means, so that the angular position of the crank wheel 6 can then be changed relative to the angular position of the plate cylinder .
  • crank wheel 6 and the drive wheel 9 are assigned a shaft 11, which is seated via a truncated cone in a bearing arranged in the wall of the side stand 12.
  • Crank wheel 6 is fixedly attached to the free end of shaft 11 (or detachable for the adjustment of the starting point of friction), drive wheel 9 is freely rotatable on shaft 11.
  • the end of shaft 11 assigned to crank wheel 6 is rotatably supported via a housing part 11.2.
  • Housing part 11.2 is firmly connected to the side stand 12.
  • the drive wheel 9 can be locked with respect to the shaft 11 via a clutch 13 arranged on the shaft 11.
  • the clutch 13 consists of a pair of toothed disks 13.1, 13.2, for example a toothed disk 13.1 on the shaft 11 is rotatably connected to the drive wheel 9 and the toothed disk 13.2 is rotatably and axially displaceably (for example via a multi-groove profile 13.3) connected to the shaft 11.
  • the toothed disks 13.1, 13.2 have an L-shaped profile and on the end face such a toothing 13.4 distributed asymmetrically over the circumference, so that mutual engagement is only possible with a single angle of rotation position.
  • the toothed disks 13.1, 13.2 are pressed together, for example, by a compression spring associated with the toothed disk 13.2 (disc springs - not shown -).
  • the triggering device 14 can also be formed from a pressure cylinder (hydraulic / pneumatic) which can be pressurized and which is arranged in the shaft 11, for which purpose holes for the pressure medium supply would also have to be drilled in the shaft 11.
  • a pressure cylinder hydraulic / pneumatic
  • frictional clutches could also be used.
  • the triggering device 14 of a friction clutch (for example hydraulic) is then acted upon at the exact time with the corresponding working medium, so that the separation or closing of the torque flow between the drive wheel 9 and the crank wheel 6 takes place only at a specific angular position of these wheels.
  • the corresponding time switching points for this would be a rotary angle sensor attached to a single-speed shaft of the printing press, in addition to a computer with a stored target angle position can be removed.
  • the triggering device 14 would then be controlled by correspondingly rapidly reacting solenoid valves.
  • the release device 14 and the frictional properties of the clutch parts would then be dimensioned such that there is only negligible slip during the switching operations.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Impression-Transfer Materials And Handling Thereof (AREA)
EP92120031A 1991-12-05 1992-11-25 Unité d'encrage pour une machine d'impression, particulièrement machine d'impression offset pour feuilles Expired - Lifetime EP0545237B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4140048 1991-12-05
DE4140048A DE4140048C2 (de) 1991-12-05 1991-12-05 Farbwerk einer Druckmaschine, insbesondere Bogenoffsetdruckmaschine

Publications (2)

Publication Number Publication Date
EP0545237A1 true EP0545237A1 (fr) 1993-06-09
EP0545237B1 EP0545237B1 (fr) 1994-09-28

Family

ID=6446293

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92120031A Expired - Lifetime EP0545237B1 (fr) 1991-12-05 1992-11-25 Unité d'encrage pour une machine d'impression, particulièrement machine d'impression offset pour feuilles

Country Status (5)

Country Link
US (1) US5249523A (fr)
EP (1) EP0545237B1 (fr)
JP (1) JPH07102698B2 (fr)
AT (1) ATE112213T1 (fr)
DE (2) DE4140048C2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5701817A (en) * 1994-10-08 1997-12-30 Heidelberger Druckmaschinen Aktiengesellschaft Apparatus for adjusting the movement of a roller in a printing press
EP0924072A1 (fr) * 1997-12-17 1999-06-23 Heidelberger Druckmaschinen Aktiengesellschaft Procédé d'opération d'une machine rotative d'impression et dispositif dans une machine rotative d'impression
EP1125739A3 (fr) * 2000-02-18 2001-10-04 Mitsubishi Heavy Industries, Ltd. Mettre en action une machine offset-feuilles comprenant un rouleau baladeur
DE102004048149A1 (de) * 2004-10-02 2006-04-06 Koenig & Bauer Ag Verfahren zum Betreiben eines Farbwerkes einer Rotationsdruckmaschine

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4445964B4 (de) * 1994-12-22 2005-12-01 Heidelberger Druckmaschinen Ag Farbwerk einer Druckmaschine
DE19505625C2 (de) * 1995-02-18 1996-12-12 Roland Man Druckmasch Zwangsantrieb für eine Farbwerkwalze in einer Druckmaschine
DE19821652A1 (de) * 1997-10-02 1999-04-08 Heidelberger Druckmasch Ag Farbwerk für Druckmaschinen
DE10003026B4 (de) * 2000-01-25 2004-03-25 Koenig & Bauer Ag Antrieb für eine Reibwalze
PT2509797E (pt) * 2009-12-07 2015-01-05 Felix Böttcher GmbH & Co KG Rolos de distribuição

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3013489A (en) * 1957-10-01 1961-12-19 Samuel M Langston Co Printing machine ink roll vibrator
EP0000329A1 (fr) * 1977-07-09 1979-01-24 Heidelberger Druckmaschinen Aktiengesellschaft Entraînement avec moyens d'entraînement pour agiter axialement en va-et-vient les rouleaux balladeurs d'un dispositif d'encrage
DE2854032A1 (de) * 1978-12-14 1980-06-19 Maschf Augsburg Nuernberg Ag Wellenkupplung mit einer synchronisiervorrichtung
DE3424721A1 (de) * 1984-07-05 1986-01-16 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Farbwerk fuer eine druckmaschine
US4869167A (en) * 1988-06-07 1989-09-26 Royse Engineering, Inc. Variable speed oscillating roller
EP0418778A2 (fr) * 1989-09-20 1991-03-27 KOENIG & BAUER-ALBERT Aktiengesellschaft Rouleaux applicateurs à mouvement de va-et-vient

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE113718C (fr) *
DE454953C (de) * 1926-01-29 1928-01-21 Schwarz Presse Akt Ges Farbwerk fuer Rotationsflachdruckmaschinen
DE1761389A1 (de) * 1968-05-13 1971-06-03 Polygraph Leipzig Vorrichtung zum Verstellen des Reibzylinderhubes in Farbwerken von Rotationsdruckmaschinen
GB1319509A (en) * 1970-01-26 1973-06-06 Adamovske Strojirny Np Tripping of ink forme rollers on printing machines
US3715979A (en) * 1970-07-09 1973-02-13 Fortuna Werke Maschf Ag Offset printing machine
DE2340300C3 (de) * 1973-08-09 1979-09-13 Roland Offsetmaschinenfabrik Faber & Schleicher Ag, 6050 Offenbach Farbkastenwalze für ein Heberfarbwerk an Druckmaschinen
DD113718A1 (fr) * 1974-05-20 1975-06-20
DE2443504C3 (de) * 1974-09-11 1978-11-23 Roland Offsetmaschinenfabrik Faber & Schleicher Ag, 6050 Offenbach Farbwerk an Druckmaschinen
DE3034644C2 (de) * 1980-09-13 1982-10-07 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Farbwerk mit changierenden Farbauftragswalzen
DE3146223C2 (de) * 1981-11-21 1985-03-21 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Feucht-Farbwerk für Offsetdruckmaschinen
US5065676A (en) * 1986-08-04 1991-11-19 Hardin Philip J Axially reversing roller for printing presses and sheet coating machines
CH682895A5 (fr) * 1990-04-23 1993-12-15 Bobst Sa Dispositif de déplacement des baladeurs dans une machine d'impression.
DE4032470A1 (de) * 1990-10-12 1992-04-30 Wifag Maschf Vorrichtung zur stufenlosen verstellung der axialen verreibungsbewegung von reibwalzen
DE4113491A1 (de) * 1991-04-25 1992-10-29 Koenig & Bauer Ag Verreibwalze fuer druckmaschinen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3013489A (en) * 1957-10-01 1961-12-19 Samuel M Langston Co Printing machine ink roll vibrator
EP0000329A1 (fr) * 1977-07-09 1979-01-24 Heidelberger Druckmaschinen Aktiengesellschaft Entraînement avec moyens d'entraînement pour agiter axialement en va-et-vient les rouleaux balladeurs d'un dispositif d'encrage
DE2854032A1 (de) * 1978-12-14 1980-06-19 Maschf Augsburg Nuernberg Ag Wellenkupplung mit einer synchronisiervorrichtung
DE3424721A1 (de) * 1984-07-05 1986-01-16 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Farbwerk fuer eine druckmaschine
US4869167A (en) * 1988-06-07 1989-09-26 Royse Engineering, Inc. Variable speed oscillating roller
EP0418778A2 (fr) * 1989-09-20 1991-03-27 KOENIG & BAUER-ALBERT Aktiengesellschaft Rouleaux applicateurs à mouvement de va-et-vient

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5701817A (en) * 1994-10-08 1997-12-30 Heidelberger Druckmaschinen Aktiengesellschaft Apparatus for adjusting the movement of a roller in a printing press
EP0924072A1 (fr) * 1997-12-17 1999-06-23 Heidelberger Druckmaschinen Aktiengesellschaft Procédé d'opération d'une machine rotative d'impression et dispositif dans une machine rotative d'impression
US6578481B1 (en) 1997-12-17 2003-06-17 Heidelberger Druckmaschinen Ag Method and device for operating a rotary printing press
EP1125739A3 (fr) * 2000-02-18 2001-10-04 Mitsubishi Heavy Industries, Ltd. Mettre en action une machine offset-feuilles comprenant un rouleau baladeur
US6612233B2 (en) 2000-02-18 2003-09-02 Mitsubishi Heavy Industries, Ltd. Sheet feed offset press
DE102004048149A1 (de) * 2004-10-02 2006-04-06 Koenig & Bauer Ag Verfahren zum Betreiben eines Farbwerkes einer Rotationsdruckmaschine
DE102004048149B4 (de) * 2004-10-02 2015-10-15 Koenig & Bauer Ag Verfahren zum Betreiben eines Farbwerkes einer Rotationsdruckmaschine

Also Published As

Publication number Publication date
JPH07102698B2 (ja) 1995-11-08
ATE112213T1 (de) 1994-10-15
DE4140048A1 (de) 1993-06-09
JPH05254100A (ja) 1993-10-05
DE59200568D1 (de) 1994-11-03
US5249523A (en) 1993-10-05
EP0545237B1 (fr) 1994-09-28
DE4140048C2 (de) 1995-09-21

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