EP0453850B1 - Vorrichtung zur Druckan- und -abstellung eines Gummizylinders im Druckwerk einer Bogen-Offsetdruckmaschine - Google Patents

Vorrichtung zur Druckan- und -abstellung eines Gummizylinders im Druckwerk einer Bogen-Offsetdruckmaschine Download PDF

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Publication number
EP0453850B1
EP0453850B1 EP91105527A EP91105527A EP0453850B1 EP 0453850 B1 EP0453850 B1 EP 0453850B1 EP 91105527 A EP91105527 A EP 91105527A EP 91105527 A EP91105527 A EP 91105527A EP 0453850 B1 EP0453850 B1 EP 0453850B1
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EP
European Patent Office
Prior art keywords
cylinder
cylinders
throw
printing
working
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
EP91105527A
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German (de)
English (en)
French (fr)
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EP0453850A1 (de
Inventor
Dietrich Dettinger
Roland Höll
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
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Filing date
Publication date
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Priority to AT91105527T priority Critical patent/ATE101081T1/de
Publication of EP0453850A1 publication Critical patent/EP0453850A1/de
Application granted granted Critical
Publication of EP0453850B1 publication Critical patent/EP0453850B1/de
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
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/24—Cylinder-tripping devices; Cylinder-impression adjustments
    • B41F13/34—Cylinder lifting or adjusting devices
    • B41F13/40—Cylinder lifting or adjusting devices fluid-pressure operated

Definitions

  • the invention relates to a device for printing on and off the blanket cylinder according to the preamble of the first claim.
  • US Pat. No. 3,067,674 describes a device for starting and stopping pressure with an actuator which can be actuated by pressure medium acting on a toggle lever mechanism and this in turn pivots the eccentric bushes of the rubber cylinder.
  • the disadvantage here is that a three-point working cylinder is necessary for a two-stage printing on and off, which corresponds to a series connection of two double-acting working cylinders and which must be designed to be very expensive in terms of force in today's high-speed printing presses in order to operate the rubber cylinder at high printing speeds in the event of malfunctions to be separated from the impression cylinder quickly enough.
  • the object of the present invention is therefore to improve a device for printing on and off of the aforementioned type in such a way that two-stage printing on and off is made possible with simple constructional means and furthermore a quick and safe printing off is ensured especially in the case of high-speed printing machines.
  • FIG. 1 shows a printing unit of an offset printing machine with a plate cylinder 1, a rubber cylinder 2 and a printing cylinder 3.
  • the cylinders are mounted on both sides with their pins in the frame walls of the offset printing machine.
  • the rubber cylinder 2 is mounted on both sides in eccentric bushes 4 for switching the pressure on and off. By pivoting the eccentric bushes 4, the rubber cylinder 2 can be released from the pressure cylinder 3 and from the plate cylinder 1.
  • the print setting process proceeds from the print shutdown as follows: If the channels of plate cylinder 1 and blanket cylinder 2 correspond to each other, i.e. the two cylinders face each other with their channels, by turning the eccentric bushes 4 by a certain angle, blanket cylinder 2 is turned on the plate cylinder 1 and continues to run until blanket cylinder 2 is optimal Has coloration and the first sheet to be printed has reached the printing cylinder 3. If the channels of the blanket cylinder 2 and the pressure cylinder 3 correspond, the pressure adjustment is carried out by turning the eccentric bushes 4 accordingly; thus the first sheet located on the printing cylinder 3 is printed.
  • Fig. 1 shows the three angular positions A, B, C of the eccentric bushing 4 and an eye 5 fastened to the eccentric bushing 4.
  • the plate and rubber cylinders 1, 2 as well as rubber and pressure cylinders 2, 3 are in contact with each other .
  • plate and blanket cylinders 1, 2 remain in contact with each other, but blanket and impression cylinders 2, 3 are separate.
  • Angular position C corresponds to the print stop - the rubber cylinder 2 has no contact with the other printing unit cylinders and has the largest gap to the printing cylinder 3.
  • the channels of the rubber and impression cylinders 2, 3 eccentric bushing 4 are rotated from position A to position B in order to print on the impression cylinder 3 to prevent if the sheet is missing. If the pressure is to be switched off completely (longer interruption), the eccentric bushing 4 is rotated in position C to avoid over-coloring of the rubber cylinder 2 when the channels of the plate and rubber cylinder 1, 2 correspond.
  • eccentric bushing 4 For the rotatability of the eccentric bushes 4, an eye 5 is attached to the latter, to which a tab 7 engages via hinge bolts 6 and which is connected via hinge bolts 8 to a release lever 9 of the release shaft 10.
  • Moving shaft 10 extends across the width of the machine and is supported in both frame walls.
  • the four-bar linkage formed from eccentric bushing 4 with eye 5, release lever 9 and bracket 7 is located on both sides of the machine.
  • the eccentric bushes 4 on both journals of rubber cylinder 2 can thus be rotated into positions A, B, C by correspondingly turning the pull-off shaft 10, and accordingly the axis of the rubber cylinder 2 can be moved parallel to the axes of the other cylinders.
  • this has a second lever 11 on a machine side, to which a toggle lever mechanism, which is formed from the brackets 13, 14 and hinge bolts 15, engages via hinge pins 12 and has its abutment in the hinge pin 16 and in an arm of the pressure assist lever 17 sits.
  • a toggle lever mechanism which is formed from the brackets 13, 14 and hinge bolts 15, engages via hinge pins 12 and has its abutment in the hinge pin 16 and in an arm of the pressure assist lever 17 sits.
  • Druckbeistellhebel 17 is rotatably mounted about a pin 18 fixed to the frame.
  • the toggle lever mechanism formed from the tabs 13, 14, is actuated by means of two parallel-arranged, double-acting working cylinders 21.B, 21.C (FIG. 2). These working cylinders 21.B, 21.C are supported with their base fixed to the frame via swivel eyes 22.
  • the piston rods 23.B, 23.C of the double-acting working cylinders 21.B, 21.C are connected to a coupling 26 by means of pivot pins 24, 25.
  • Tab 13 has a third hinge pin 21 with which it is articulated on coupling 26.
  • the stroke paths of the similar double-acting working cylinders 21.B, 21.C are dimensioned such that the piston rods 23.B, 23.C in the extended state press the toggle lever mechanism of the brackets 13, 14 into the extended position, that is to say, the eye 5 of the eccentric bush 4 assumes position A (Fig. 1).
  • the extended state of the piston rods 23.B, 23.C thus corresponds to the pressure setting.
  • the double-acting working cylinders 21.B, 21.C are advantageously cylinders which can be pressurized with compressed air, that is to say correspondingly double-acting pneumatic cylinders.
  • the compressed air is provided by a pressure pump of the printing press and passed to the cylinders via pressure lines, with compressed air stores also being provided.
  • the piston rods 23.B, 23.C can then be individually retracted and extended individually via the respective working chambers of the double-acting working cylinders 21.B, 21.C associated with electrically controllable valves, in particular electrically switchable solenoid valves.
  • the double-acting working cylinders 21.B, 21.C as hydraulic cylinders, in which case a corresponding hydraulic system effects the strokes of the piston rods 23.B, 23.C.
  • the advantage of designing the working cylinders 21.B, 21.C as a pneumatic cylinder lies in the well-known fact that the compressed air can be discharged via electrically switchable solenoid valves where it is no longer needed.
  • a hydraulic system requires a complex return system (oil circuit).
  • Compressed air is also required at many points in today's sheet-fed offset printing presses, so that the device for supplying and stopping the pressurized air according to the invention can be easily integrated into the pneumatics of the printing press if the system supplying the compressed air is designed accordingly.
  • Fig. 2 shows like Fig. 1 the extended position of the toggle lever of the tabs 13, 14, that is, the pressure adjustment. For this reason and the inhibiting effect of the eccentric bushes 4, there is also no reaction of the pressure between the blanket cylinder 2 and the pressure cylinder 3, in particular in the case of the so-called channel impacts (inlet and outlet of the channels) on the working cylinders 21.B, 21.C.
  • FIG. 3 shows this pressure cut-off with the rubber cylinder 2 still positioned towards the plate cylinder 1.
  • the toggle lever mechanism of the plates 13, 14 has been displaced into a kinked position by the retracted piston rod 23.B and the coupling 26 thereby pivoted away. Eye 5 of eccentric bushing 4 was pressed into position B by way of the release shaft 10 and release lever 9 (FIG. 1). If the pressure is to be switched on again, this is achieved by pressurizing the corresponding chamber of working cylinder 21.B. Piston rod 23.B thus extends and, via coupling 26, presses the toggle mechanism of the tabs 13, 14 back into its extended position.
  • the blanket cylinder 2 is turned off or on by the impression cylinder 3 (corresponding switching times for the solenoid valves) when the channels of the blanket cylinder 2 and the impression cylinder 3 correspond to one another. The last sheet is then still fully printed out or the rubber cylinder 2 does not touch the printing cylinder 3 without a sheet when printing is started.
  • the switching times for the operations described further below are taken from a switching device which detects the angular position of the printing press and forms control signals for the electrically switchable solenoid valves with appropriate commands (print off, rubber blanket coloring, etc.).
  • This switching device can be formed by a high-resolution rotary angle encoder running synchronously with the machine with a downstream computing device.
  • the rotary encoder can be located on a single-speed shaft on the feeder of the sheet-fed printing press.
  • the rubber cylinder 2 is switched off from the plate cylinder 1 - starting from the position according to FIG. 3 - by switching the working cylinder 21.C in such a way that the piston rod 23.C is immersed in its end position. This also takes place during the correspondence of the channels of the plate and rubber cylinders 1, 2.
  • the toggle lever mechanism of the tabs 13, 14 now assumes its completely kinked position (FIG. 4). 1 eye 5 is rotated from eccentric bushing 4 to position C.
  • the positioning of the rubber cylinder 2 against the impression cylinder 3 when the first sheet to be printed lies on the impression cylinder 3 - starting from the position according to FIG. 3 - is carried out by switching the corresponding chamber of working cylinder 21.B, such that piston rod 23.B extends into its end position.
  • the tabs 13, 14 of the toggle lever mechanism assume an extended position - the rubber cylinder 2 is engaged on the pressure cylinder 3.
  • the use of a three-point working cylinder has the following basic disadvantage. If the first working cylinder is extended, and if the second one downstream of it is also to be extended (against a force), then an unfolding force fully affects the first (pressurized) working cylinder. Because of the compressibility of the pressure medium, especially with compressed air, there is a more or less strong yielding of the first working cylinder or its piston rod.
  • the three-point working cylinder has another disadvantage. Because the two double-acting working cylinders are connected in series or in series, the stroke lengths (hence three approachable points) do not add up, but the forces of the working cylinders do not. This results in a simple manner from the fact that the second working cylinder must be supported on the first one upstream of it.
  • the rubber cylinder 2 is shut off from the pressure cylinder 3 by immersing the piston rod 23.B, i.e. pulling the hinge pin 27 of the toggle lever mechanism of the tabs 13, 14 downward via coupling 26 with the aid of a force-increasing lever action (FIGS. 2 and 3).
  • Hinge pin 25 acts as a counter bearing and is pressed forcefully upwards.
  • a force acts on the pivot pin 25 parallel to the direction of the piston rod 23.C in such a way that the pivot pin 25 tries to pull the piston rod 23.C beyond its upper end position.
  • the phase of lifting the blanket cylinder 2 from the printing cylinder 3 is particularly time-critical, since a too late, i.e. Lifting outside the channel, for example in the case of a missing sheet, due to the inking of the printing cylinder 3, requires a longer downtime because of the necessary cleaning of the printing cylinder 3. It is precisely in this phase that the repercussions that inevitably arise in a three-point working cylinder and are caused by the series connection, have a particularly negative effect on the reaction behavior. Because of the high compressibility of compressed air, the use of pneumatic three-point working cylinders is only possible with great effort (very high pressures).
  • Another advantage of a device according to the type of the invention results in a switching option with a very advantageous reaction behavior which has not yet been mentioned. If an irregularity is found in the sheet travel (eg double sheet handed over to the pre-gripper, winder), the pressure must be stopped completely by then placing the rubber cylinder 2 immediately at the greatest distance from the printing cylinder 3. Such situations have absolute priority, ie the gradual shutdown during the Channel correspondence between plate cylinder 1, blanket cylinder 2 and impression cylinder 3 has to be avoided, since a fold or double sheet entering the printing zone will cause tremendous shocks in the bearings of these cylinders and cause damage if the blanket is adjusted to the actual paper thickness from blanket cylinder 2 to impression cylinder 3 .
  • the pressure in correspondence of the channels of the rubber and pressure cylinders 2, 3 can be switched off by simultaneous pressurization of the working cylinders 21.B and 21.C, ie coupling 26 pulled by the piston rods 23.B and 23.C brings the toggle mechanism of the tabs 13, 14 - starting from the position according to FIG. 2 - immediately into the position according to FIG. 4. Due to the parallel arrangement of the working cylinders 21.B, 21.C, pivot pins 26 pull the total of the forces of the piston rods 23.B, 23.C, at the same time this pressure shutdown process only takes the time that a piston rod 23.B or 23.C needs for immersion.
  • the pressure starting and stopping device thus avoids a complicated, complex, and therefore also expensive three-point working cylinder and enables the use of two similar, double-acting and pressurized working cylinders in a simple manner.
  • the disadvantages resulting from the principle of a three-point working cylinder are not only avoided, but also supplemented by the advantages of a parallel connection.
  • a device according to the invention has a particularly favorable effect on the construction volume.
  • the switching times for the pressure switching on and off for the solenoid valves are provided by a switching device which detects the position of the printing unit cylinders in such a way that the switching on and off of the rubber cylinder 2 to / from the printing and plate cylinder 3, 1 takes place in the area of the opposite cylinder channels.
  • the switching times can be selected so that at the beginning of the channel correspondence, i.e. in the opposite pressure end areas of rubber, pressure cylinder 2, 3 or rubber, plate cylinder 2, 1, the corresponding solenoid valves are switched.
  • the sum of the dead and reaction times can be achieved by applying a correspondingly higher pressure medium, i.e. Avoid higher working pressures, but then requires a more complicated, complex and expensive design of the particularly pneumatic system.
  • the switching points for the solenoid valves are formed by the switching device not only as a function of the position of the printing unit cylinders relative to one another, but also as a function of the speed.
  • the switching device thus also detects the speed of rotation of the printing press, for example via a tachometer signal or the actual speed of the machine main drive control, and forms correspondingly advanced switching times.
  • the switching time for the corresponding switching on or off is at the beginning of the channel correspondence, for example, at high speed it is brought forward in proportion to the speed, i.e. it is placed in the area of, for example, the sheet still to be printed. This ensures that the rubber cylinder 2 is always switched on and off in the channel area.
  • the speed-dependent or printing-speed-dependent ballast angle can be selected in proportion to the speed, but also according to an empirically determined characteristic curve.
  • Such a configuration of a switching device thus additionally reduces the constructional complexity of a device for switching on and off the pressure according to the type of the invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Screen Printers (AREA)
EP91105527A 1990-04-25 1991-04-08 Vorrichtung zur Druckan- und -abstellung eines Gummizylinders im Druckwerk einer Bogen-Offsetdruckmaschine Expired - Lifetime EP0453850B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT91105527T ATE101081T1 (de) 1990-04-25 1991-04-08 Vorrichtung zur druckan- und -abstellung eines gummizylinders im druckwerk einer bogenoffsetdruckmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4013075A DE4013075C1 (ja) 1990-04-25 1990-04-25
DE4013075 1990-04-25

Publications (2)

Publication Number Publication Date
EP0453850A1 EP0453850A1 (de) 1991-10-30
EP0453850B1 true EP0453850B1 (de) 1994-02-02

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ID=6404993

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Application Number Title Priority Date Filing Date
EP91105527A Expired - Lifetime EP0453850B1 (de) 1990-04-25 1991-04-08 Vorrichtung zur Druckan- und -abstellung eines Gummizylinders im Druckwerk einer Bogen-Offsetdruckmaschine

Country Status (6)

Country Link
US (1) US5167187A (ja)
EP (1) EP0453850B1 (ja)
JP (1) JP2624583B2 (ja)
AT (1) ATE101081T1 (ja)
DE (2) DE4013075C1 (ja)
ES (1) ES2050007T3 (ja)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5272975A (en) * 1990-04-25 1993-12-28 Man Roland Druckmaschinen Ag Throw-on/throw-off device for a blanket cylinder with a printing speed dependent control system for a sheet-fed offset press
DE4034323C2 (de) * 1990-10-29 1997-12-04 Kba Planeta Ag Vorrichtung zum Druckan- und abstellen
JP2585995Y2 (ja) * 1992-10-01 1998-11-25 株式会社小森コーポレーション 胴着脱装置
NL9302062A (nl) * 1993-11-29 1995-06-16 Drent H H Maschf Bv Offsetdrukmachine.
DE4407631C1 (de) * 1994-03-08 1995-10-19 Roland Man Druckmasch Verfahren zum Anfahren/Wiederanfahren des Fortdrucks bei einer bogenverarbeitenden Druckmaschine, insbesondere Bogenoffsetdruckmaschine
DE19513378A1 (de) * 1995-04-08 1996-10-10 Roland Man Druckmasch Vorrichtung zur Druckan- und -abstellung
DE19543494C1 (de) * 1995-11-22 1997-05-15 Roland Man Druckmasch Einstellvorrichtung für Druckwerkzylinder
DE10014040B4 (de) * 1999-11-23 2005-07-21 Koenig & Bauer Ag Welle zum Synchronisieren einer Stellbewegung
DE10066156B4 (de) * 1999-11-23 2005-11-17 Koenig & Bauer Ag Welle zum Synchronisieren einer Stellbewegung
DE10057051B4 (de) * 1999-12-06 2011-03-10 Heidelberger Druckmaschinen Ag Verfahren zum Anfahren einer Druckmaschine
DE10052354B4 (de) * 2000-10-21 2004-08-26 Koenig & Bauer Ag Vorrichtung zur Druckan- und Druckabstellung eines Gummizylinders zu einem Plattenzylinder und einem Gegendruckzylinder
DE10055278A1 (de) * 2000-11-08 2002-05-23 Koenig & Bauer Ag Vorrichtung zur dublierfreien Druckschaltung
JP4370087B2 (ja) * 2002-10-31 2009-11-25 リョービ株式会社 オフセット印刷機のブランケット胴の支持構造
DE10304495B4 (de) * 2003-02-05 2015-04-16 Koenig & Bauer Aktiengesellschaft Verfahren und Anordnung für die Synchronisierung eines elektrischen Einzelantriebes
JP4603811B2 (ja) * 2003-07-25 2010-12-22 ハイデルベルガー ドルツクマシーネン アクチエンゲゼルシヤフト 印刷機に版板を供給し且つ／又は排出するための装置
ITBO20030627A1 (it) * 2003-10-23 2005-04-24 Gd Spa Unita' di stampa di un nastro per una macchina automatica.
EP1769914B1 (de) * 2005-09-29 2012-08-01 Heidelberger Druckmaschinen AG Folienübertragungsvorrichtung
US20080279587A1 (en) * 2007-05-09 2008-11-13 Soenke Dehn Digital multi-color printing machine
DE102008010009A1 (de) 2008-02-20 2009-08-27 Koenig & Bauer Aktiengesellschaft Vorrichtung zur Druckan- und Druckabstellung eines Gummizylinders zu einem Plattenzylinder und einem Druckzylinder
DE102008045428A1 (de) * 2008-09-02 2010-03-04 Koenig & Bauer Aktiengesellschaft Bogendruckmaschine mit einer Vorrichtung zum Übertragen von bildgebenden Transferschichten von einer Transferfolie auf einen Druckbogen sowie Verfahren hierzu
JP2013240986A (ja) * 2012-04-27 2013-12-05 Komori Corp 液体転写装置及び液体転写方法
DE102014116074A1 (de) 2014-11-04 2016-05-04 manroland sheetfed GmbH Steuerung für Bogendruckmaschinen
DE102018206126A1 (de) * 2018-04-20 2019-10-24 Koenig & Bauer Ag Bogendruckmaschine
DE102021112079A1 (de) 2021-05-10 2022-11-10 Koenig & Bauer Ag Bogendruckmaschine mit mindestens einem Druckwerk und ein Verfahren zum Druck-An- und/oder Druck-Ab-Stellen von Zylinderkanäle aufweisenden rotatorisch angetriebenen Zylindern eines Druckwerks einer Bogendruckmaschine
DE102021112080A1 (de) 2021-05-10 2022-11-10 Koenig & Bauer Ag Verfahren zum Betreiben einer Bogendruckmaschine mit mindestens einem Druckwerk

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US3067674A (en) * 1961-03-14 1962-12-11 Miehle Goss Dexter Inc Throw-off mechanism for offset presses

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DE934407C (de) * 1954-04-04 1955-10-20 Roland Offsetmaschf An- und Abstellvorrichtung fuer den Gummizylinder von Offsetdruckmaschinen
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DE2944272C2 (de) * 1979-11-02 1983-03-03 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Vorrichtung zur An- und Abstellung des Gummituchzylinders einer Bogen-Rotations-Offsetdruckmaschine
US4415284A (en) * 1981-10-27 1983-11-15 James W. Moss Thermal die-cutting machine for die-cutting letters, numerals and other characters from plastic tape
DD203868A1 (de) * 1981-12-31 1983-11-09 Helmut Schoene Vorrichtung zum druckan- und abstellen von zylindern

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Also Published As

Publication number Publication date
ES2050007T3 (es) 1994-05-01
JPH04226354A (ja) 1992-08-17
DE59100976D1 (de) 1994-03-17
ATE101081T1 (de) 1994-02-15
DE4013075C1 (ja) 1991-06-20
EP0453850A1 (de) 1991-10-30
JP2624583B2 (ja) 1997-06-25
US5167187A (en) 1992-12-01

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