EP0453844A2 - Commande auxiliaire pour le rouleau encrier d'une machine à imprimer offset - Google Patents

Commande auxiliaire pour le rouleau encrier d'une machine à imprimer offset Download PDF

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Publication number
EP0453844A2
EP0453844A2 EP91105474A EP91105474A EP0453844A2 EP 0453844 A2 EP0453844 A2 EP 0453844A2 EP 91105474 A EP91105474 A EP 91105474A EP 91105474 A EP91105474 A EP 91105474A EP 0453844 A2 EP0453844 A2 EP 0453844A2
Authority
EP
European Patent Office
Prior art keywords
machine
eccentric
auxiliary drive
drive
drive according
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
EP91105474A
Other languages
German (de)
English (en)
Other versions
EP0453844A3 (en
EP0453844B1 (fr
Inventor
Joachim Olek
Heinrich Ochs
Kurt Difflipp
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 EP0453844A2 publication Critical patent/EP0453844A2/fr
Publication of EP0453844A3 publication Critical patent/EP0453844A3/de
Application granted granted Critical
Publication of EP0453844B1 publication Critical patent/EP0453844B1/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
    • B41F31/004—Driving means for ink rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/10—Applications of feed or duct rollers

Definitions

  • the invention relates to an auxiliary drive for the ink fountain roller of an offset printing machine, in particular sheet-fed offset printing machine, according to the preamble of claim 1.
  • the ink requirement is adjusted over the length of the ink fountain roller using ink knives or dosing elements.
  • the ink fountain roller rotates when the machine is running in adjustable angle steps.
  • a separate motor is usually provided along with the gearbox and control electronics.
  • the drive is often carried out mechanically, in which, for example, a shaft derived from the machine drive has a crank pin and a drive rod articulated thereon carries out oscillating movements corresponding to the speed.
  • the other end of the drive rod is articulated on a freewheel (detent gear) mounted on the drive pin of the ink fountain roller and thus causes angular step movements of the ink fountain roller. Examples of this are known from DE-PS 1 000 400 and DE-Gbm 8 628 071.
  • the printing ink would run out through the gap between the ink knife / metering element and the ink fountain roller in a time dependent on its toughness / toughness and thus contaminate machine parts located underneath. This can be avoided if the ink fountain roller remains driven during machine downtimes. This creates a stationary ink film on the ink fountain roller and prevents it from running out.
  • auxiliary motors only have to be provided for driving the ink fountain roller when the machine is at a standstill.
  • the drive expenditure is reduced by the fact that the ink fountain roller is driven mechanically by the rotation of the machine itself.
  • the object of the present invention is therefore to provide an auxiliary drive for the ink fountain roller of an offset printing machine according to the preamble of claim 1, which takes over the gradual rotation of the ink fountain roller during machine downtimes with the least technical effort and also turns itself on and off.
  • the ink fountain roller 1 shows a printing unit of an offset printing machine according to the prior art.
  • the ink fountain roller 1 is rotated gradually, for example as known from DE-Gbm 8 628 071 or DE-PS 1 000 400, when the machine is running via a gear. Printing ink thus reaches the printing plate mounted on a plate cylinder P via a siphoning roller and further rollers and inking rollers F (not shown).
  • a dampening unit 2, 3, 4 is arranged, which is designed as a film dampening unit with its own dampening unit drive 5.
  • a film dampening system with its own drive is known for example from the book: "Offsetdrucktechnik", 6th edition 1989, Weinschriftenverlag 7012 Fellbach, page 437ff.
  • a scoop roller 3, which is infinitely variable in speed by its own dampening unit drive 5, is partially immersed in a dampening solution tank 4 and delivers the dampening solution to the other dampening unit rollers 2. Since an adjustable gap is formed for metering between the scoop roller 3 and a dampening unit roller 2, such a dampening unit can still be driven even when the machine is at a standstill and continues to be driven so that a damp film is always present on the scoop roller 3.
  • Other dampening units known in the prior art can also be used for the invention described further below, these merely having to have a drive that can also be operated when the machine is at a standstill.
  • the printing press has an oil supply system which delivers oil under pressure to the corresponding lubrication points.
  • Ink fountain roller 1 is rotatably mounted on both sides with pins in the frame walls.
  • a freewheel 9 with a lever 10 sits on one side of its drive pin 8.
  • the direction of rotation in which the freewheel 9 acts non-positively corresponds to the direction of rotation of the ink fountain roller 1.
  • a further freewheel can be provided to drive the ink fountain roller 1 during machine operation, which then moves the ink fountain roller 1 step by step, as described in the beginning of the description writings mentioned, drives.
  • FIG. 2 An embodiment of the invention is shown in FIG. 2.
  • a drive rod 11 is articulated at its lower end to a rocker arm 12 which is rotatably mounted about a bolt 13 fixed to the frame. With its upper end, the drive rod 11 is connected to the lever 10.
  • the rocker 12 lies by its own weight, so that the drive rod 11 with a bearing surface 14, which is preferably formed as a concave recess for reasons of space, rests on an eccentric 15 which is seated on a shaft 16 of the dampening unit drive 5 of the dampening unit.
  • Shaft 16 can be an extended journal of scoop roller 3, but it can also be another gear shaft of dampening unit drive 5 that does not run at high speed.
  • the eccentric 15 is advantageously provided with a roller along with needle or ball bearings.
  • dampening unit drive 5 continues as intended when the machine is at a standstill, then the eccentric 15 generates rocking movements in the drive rod 11 via rocker arm 12, which then gradually drive the ink fountain roller 1 via lever 10 and freewheel 9.
  • the speed at which the dampening unit drive 5 runs when the machine is at a standstill can be preset and Furthermore, dampening unit drive 5 can be connected to the machine control of the printing press in such a way that it then continues to run automatically at a predetermined, for example reduced speed.
  • the rocker 12 rests on the eccentric 15 due to it and the weight of the drive rod 11 with the bearing surface 14.
  • spring-loaded means can also be provided, which pull the rocker 12 onto the eccentric 15 when the machine is at a standstill.
  • a single-acting pressure cylinder with a piston which can be acted upon by the oil pressure of the oil supply system, can for example be located in a frame 17 attached to the frame 18 may be arranged. so that when the machine is running, the rocker 12 with the bearing surface 14 can be pivoted away from the stroke area of the eccentric 15 by the oil pressure. Eccentric 15 now rotates freely and because of freewheel 9, the ink fountain roller 1 is only driven by its main drive.
  • the piston 18 is dimensioned with respect to its stroke and the lifting force so that even with low oil pressure (starting the machine in slow speed) the stroke required to free the eccentric 15 is exerted on the system drive rod 11 and rocker 12 against their weight.
  • the single-acting pressure cylinder and piston embedded in the bridge 17 are acted upon by oil from the oil supply system directly through an oil line 7 of the oil supply system.
  • the pressurization of the single-acting pressure cylinder can be controlled by an electrically switchable solenoid valve.
  • the switching signals for the solenoid valves can easily be found in the main drive or machine control. The pressure oil is then applied electrically controlled when the machine starts to run.
  • the rocker arm 12 can also be pivoted away by an electromagnet 19 (FIG. 3a).
  • Other actuating means 22 can also be used, which take effect when the machine is running.
  • Compressed air is used, which e.g. the switching on and off of the inking rollers F (Fig. 1) causes (single-acting pneumatic cylinder).
  • An actuating means 22 that becomes effective in the event of negative pressure can also be used.
  • the vacuum can then be provided by the suction air of the feeder (suction head, lifting vacuum).
  • the auxiliary drive is also advantageously switched off in connection with electrically switchable valves.
  • the auxiliary drive is driven by an eccentric 15 arranged by a dampening unit drive 5 and formed from a lever 10, drive rod 11 and rocker arm 12 as a four-bar linkage.
  • Swing arm 12 is to be designed so that the stroke of the eccentric 15 is transmitted sufficiently strongly in the stroke movement of the drive rod 11.
  • the four-bar linkage in conjunction with the eccentric 15 driven by the dampening unit drive 5 not only enables an ink fountain roller 1 to be alternatively driven when the machine is at a standstill and is located almost directly vertically above the dampening unit 2, 3, 4.
  • Drive rod 11 does not have to run vertically, as shown in FIG. 2, but can of course also be inclined to the vertical. It is then also possible to drive an ink fountain 1, which is further from the dampening unit drive 5 in relation to the horizontal.
  • FIG. 3b shows further variants for the auxiliary drive of the ink fountain roller 1 from the dampening unit drive 5.
  • the rocker 12 is arranged below the eccentric 15 and with its free end via a cable 20 with a lever 10, which, as already described, sits with a freewheel 9 on the drive pin 8 of the ink fountain roller 1.
  • the Cable 20 can be designed as a simple rope (wire rope) or as a chain.
  • Lever 10 is pulled in the drive direction of the ink fountain roller 1 via a tension spring 21 articulated to the frame.
  • the lifting movements of the eccentric 15 stretch the tension spring 21 periodically, since this rocker 12 pulls on the eccentric 15.
  • the ink fountain roller 1 is moved by the expansion energy of the tension spring 21.
  • 3c shows a further variant for the auxiliary drive of the ink fountain roller 1 from the dampening unit drive 5.
  • This arrangement is equivalent to that of FIG. 3b, except that here the stroke of the eccentric 15 or that of the free end of the rocker 12 directly effects the movement of the ink fountain roller 1.
  • the tension spring 12 pulls the lever 10 in the free-running (not force-transmitted) direction of free-wheel 9 here. This is achieved by a deflection roller 23.
  • the cable 20 can be articulated directly on a roller 24, said roller being seated on the drive pin 8 with a freewheel 9 (FIGS. 3d and 3e).
  • the effect of the variant according to FIG. 3d corresponds to that of FIG. 3b, that of FIG. 3e or 3c.
  • the advantage of the invention thus lies in the simplicity of the auxiliary drive for the ink fountain roller 1, which is activated automatically when the machine is at a standstill.
  • the dampening unit drive 5 takes over the drive of the ink fountain roller 1 without any great technical effort.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Coating Apparatus (AREA)
  • Soil Working Implements (AREA)
EP91105474A 1990-04-26 1991-04-06 Commande auxiliaire pour le rouleau encrier d'une machine à imprimer offset Expired - Lifetime EP0453844B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4013237A DE4013237C1 (fr) 1990-04-26 1990-04-26
DE4013237 1990-04-26

Publications (3)

Publication Number Publication Date
EP0453844A2 true EP0453844A2 (fr) 1991-10-30
EP0453844A3 EP0453844A3 (en) 1992-02-19
EP0453844B1 EP0453844B1 (fr) 1994-06-15

Family

ID=6405086

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91105474A Expired - Lifetime EP0453844B1 (fr) 1990-04-26 1991-04-06 Commande auxiliaire pour le rouleau encrier d'une machine à imprimer offset

Country Status (7)

Country Link
US (1) US5136940A (fr)
EP (1) EP0453844B1 (fr)
JP (1) JPH0798395B2 (fr)
AT (1) ATE107230T1 (fr)
BR (1) BR9101689A (fr)
DE (2) DE4013237C1 (fr)
ES (1) ES2055937T3 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3423627B2 (ja) * 1998-11-11 2003-07-07 東芝機械株式会社 輪転印刷機
JP4582867B2 (ja) * 2000-06-23 2010-11-17 株式会社小森コーポレーション 印刷機
DE102016205347B4 (de) * 2016-03-31 2020-05-14 Koenig & Bauer Ag Werk für eine Bogenverarbeitungsmaschine und ein Verfahren zum Betreiben einer Antriebsanordnung
CN111845030A (zh) * 2020-08-06 2020-10-30 时瑶 一种柔性版凸版印刷机印版快速转换装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE742317C (de) * 1940-04-13 1943-11-27 Windmoeller & Hoelscher Mehrfarben-Anilin-Druckmaschine
US4007683A (en) * 1976-05-11 1977-02-15 Dickerson Henry R Auxiliary drive and sprocket adapter for ink fountain roller
DE3221514A1 (de) * 1982-06-07 1984-02-02 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Vorrichtung an mehrfarbenrotationsdruckmaschinen zum aufbringen von fluessigkeiten auf einen druckwerkszylinder

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1785158A (en) * 1927-09-23 1930-12-16 Wood Newspaper Mach Corp Ink-fountain drive
US2406928A (en) * 1943-03-02 1946-09-03 Goss Printing Press Co Ltd Fountain inker drive mechanism
US3098437A (en) * 1960-12-29 1963-07-23 Miehle Goss Dexter Inc Inking arrangement for rotary printing presses
US3170397A (en) * 1962-10-09 1965-02-23 Orville V Dutro Ink fountain and ductor roll drive
US3191528A (en) * 1963-02-21 1965-06-29 Graphic Arts Technical Foundat Automatic dampener control for a rotary lithographic press
US3590735A (en) * 1969-08-26 1971-07-06 Harris Intertype Corp Ductor roll accelerating mechanism
US3688696A (en) * 1970-05-08 1972-09-05 Harris Intertype Corp Motorized ductor roll
DE8628071U1 (fr) * 1986-10-22 1986-12-04 M.A.N.- Roland Druckmaschinen Ag, 6050 Offenbach, De

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE742317C (de) * 1940-04-13 1943-11-27 Windmoeller & Hoelscher Mehrfarben-Anilin-Druckmaschine
US4007683A (en) * 1976-05-11 1977-02-15 Dickerson Henry R Auxiliary drive and sprocket adapter for ink fountain roller
DE3221514A1 (de) * 1982-06-07 1984-02-02 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Vorrichtung an mehrfarbenrotationsdruckmaschinen zum aufbringen von fluessigkeiten auf einen druckwerkszylinder

Also Published As

Publication number Publication date
JPH0798395B2 (ja) 1995-10-25
EP0453844A3 (en) 1992-02-19
US5136940A (en) 1992-08-11
JPH04226364A (ja) 1992-08-17
DE59101916D1 (de) 1994-07-21
EP0453844B1 (fr) 1994-06-15
ATE107230T1 (de) 1994-07-15
DE4013237C1 (fr) 1991-07-11
ES2055937T3 (es) 1994-09-01
BR9101689A (pt) 1991-12-10

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