EP0022381B1 - Dispositif de commande des cylindres d'une machine d'imprimerie offset - Google Patents

Dispositif de commande des cylindres d'une machine d'imprimerie offset Download PDF

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Publication number
EP0022381B1
EP0022381B1 EP19800400792 EP80400792A EP0022381B1 EP 0022381 B1 EP0022381 B1 EP 0022381B1 EP 19800400792 EP19800400792 EP 19800400792 EP 80400792 A EP80400792 A EP 80400792A EP 0022381 B1 EP0022381 B1 EP 0022381B1
Authority
EP
European Patent Office
Prior art keywords
wheel
cylinders
shaft
cylinder
drive
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
EP19800400792
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0022381A1 (fr
Inventor
Alain Ducournau
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.)
Creusot Loire SA
Original Assignee
Creusot Loire SA
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 Creusot Loire SA filed Critical Creusot Loire SA
Publication of EP0022381A1 publication Critical patent/EP0022381A1/fr
Application granted granted Critical
Publication of EP0022381B1 publication Critical patent/EP0022381B1/fr
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
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/008—Mechanical features of drives, e.g. gears, clutches
    • B41F13/012—Taking-up backlash
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/02—Rotary lithographic machines for offset printing
    • B41F7/12—Rotary lithographic machines for offset printing using two cylinders one of which serves two functions, e.g. as a transfer and impression cylinder in perfecting machines

Definitions

  • the subject of the invention is a new device for controlling the cylinders of a printing machine by the OFFSET process.
  • the cylinders having to be obviously synchronized, they generally receive their movements from a single transmission shaft which drives a meshing wheel with a corresponding toothed wheel placed on one of the cylinders, for example a plate cylinder, the movement then being transmitted. in series from cylinder to cylinder then to the ink rollers, each cylinder being fitted at the end of the shaft with a toothed wheel which meshes with the corresponding wheels of the cylinders which surround it.
  • the Blanchet cylinders are generally covered with a covering made up of a rubberized canvas intended to receive the impression in order to transfer it to the paper and having a certain elasticity which allows the application under pressure of the sheet.
  • the latter are provided at their ends with smooth treads which rest on each other and whose diameters are strictly exact so as to roll without slipping.
  • the slight difference in diameter between the Blanchet cylinders and the plate cylinders leads to certain drawbacks in the conventional serial transmission mode when one wants to carry out a register adjustment.
  • the register adjustment which allows perfect color overlay, is obtained by the possibility of slight angular adjustments of each of the plate cylinders around its axis.
  • This adjustment can be obtained for example by axial displacement of the drive wheel of the plate cylinder which, when the teeth are helical, turns slightly while resting on the wheels which surround it and in particular the wheel of the corresponding blanket cylinder.
  • these two cylinders are in contact and consequently the Blanchet cylinder would tend, by friction, to follow the rotation of the plate cylinder. It is therefore necessary to allow a slight rotation of the plate cylinder relative to the Blanchet cylinder by means of a connection, for example friction. This may result in a slight offset of the grooves which are provided on the cylinders for the attachment of their respective clothing.
  • each plate cylinder carries two straight side-by-side wheels, wedged at the end of the shaft, respectively a inner wheel which meshes with a drive wheel of the corresponding blanket cylinder and an outer wheel which receives the drive movement.
  • the subject of the invention is a new, less bulky and less expensive arrangement of the drive control, which also has the advantage of combining the advantages of the known arrangements without having the drawbacks of each of them.
  • the two intermediate wheels are each centered respectively on the shaft of one of the Blanchet cylinders, next to the latter's drive wheel, said intermediate wheels being mounted free in rotation each on the shaft which carries it.
  • Figure 1 there is shown in front view the drive kinematic chain of a printing machine according to the invention, the set of rollers being shown in Figure 2 in section along the line A-A.
  • the set of rollers comprises two blanket cylinders 1 and 2 between which the sheet passes, and whose axes are placed in a plane slightly inclined relative to the horizontal .
  • Each Blanchet cylinder 1 or 2 cooperates with a plate cylinder, respectively 3 and 4.
  • Each plate cylinder 3 or 4 is associated with a chain of ink rollers, respectively 5 and 6, the role of which is to take ink from a trough forming an inkwell and to spread it progressively so as to distribute it evenly over the corresponding plate cylinder.
  • each cylinder and each roller are provided, at one end of the shaft, with a toothed wheel which meshes with the corresponding wheels placed at the ends of the shafts of the cylinders or rollers which frame it, each cylinder thus receiving its movement from a neighboring cylinder and transmitting it to a neighboring cylinder (or roller).
  • the invention is characterized by an original arrangement of the drive kinematic chains of the different cylinders which is shown diagrammatically in FIG. 2.
  • Figure 2 is a developed view of a section along the line A-A and that is why the cylinders and the rollers are shown one above the other.
  • the drive shaft 80 drives, via a bevel gear reducer 8, the toothed wheel 81 which sets in motion all of the cylinders and rollers. This movement is transmitted separately to the two Blanchet cylinders by the plate cylinder 3, the shaft 30 of which carries two joined toothed wheels 31 and 32 centered in planes P 1 and P 2 and which constitute the pinions upstream of the drive kinematic chains. Blanchet cylinders.
  • these two pinions may have a smaller width of teeth than that of the wheel 32 placed towards the outside, at the end of the shaft 30 and which directly receives the movement of the drive wheel 81 and transmits it to the second blanket cylinder 2 via a second kinematic chain.
  • the Blanchet cylinder 2 carries, wedged on its shaft 20, a wheel 21 which meshes with a toothed wheel 41 wedged on the shaft of the plate cylinder 4. These two wheels are centered in a plane P 3 offset by relative to the plane P i , preferably on the side of the cylinders, so as to allow the rotation of the two wheels 11 and 21.
  • the axis 40 of the plate cylinder 4 carries a second outer wheel 42 wedged at the end of the shaft to side of the inner wheel 41 and centered in the same plane P 2 as the wheel 32 wedged on the shaft of the cylinder 3 and meshing with the driving wheel 81.
  • FIG. 3 shows in more detail the method of mounting the drive wheels for the Blanchet cylinders and the plate cylinders.
  • the different shafts 10, 20, 30, 40 of the cylinders are carried at their ends by bearings 13, 23, 33, 43 mounted on the frame B of the machine.
  • the treads for example 100 and 200 which rest on each other so as to maintain the center distance of the cylinders.
  • a sleeve 34 is mounted in cantilever which is wedged on the shaft 30 for example by a keying or by a locking system 35 of known type.
  • the wheel 31 is centered on the sleeve 34 and secured in rotation with the latter.
  • the wheel 32 is provided with an extension 320 which is adjusted to a centering surface 340 formed on the outside of the sleeve 34 and it is slidably mounted on said surface so as to be able to move axially over a small distance.
  • This axial displacement is determined, in known manner, by an adjustment rod 7 passing through an axial bore formed in the shaft 3 and provided on the mechanism side with a head 70 for fixing to the extension 320 of the wheel 32 and at its other end, on the operating side, of a conventional adjustment knob not shown.
  • the wheel 32 is secured in rotation with the sleeve 34 by means of straight grooves 321.
  • the rod 7 an axial displacement of the wheel 32 is controlled, the latter remains integral in rotation of the shaft 30 of the plate cylinder 3 and of the wheel 31.
  • the wheel 32 meshes with the drive wheel 81 and the intermediate pinion 12 by means of helical teeth. Consequently, the axial displacement of the wheel 32 controls, by pressing on the wheel 81, a slight rotation of the wheel 32 and of its axis 30.
  • This arrangement allows the damper adjustment of the cylinder of plate 3. Thanks to the meshing of the toothed wheels 11 and 31, this slight rotation of the plate cylinder 3 is transmitted to the corresponding Blanchet cylinder 1, which in particular makes it possible to maintain the coincidence of the hooking grooves of the linings of the cylinders.
  • the damper adjustment of the plate cylinder 3 n ' has no consequence on the other Blanchet 2 cylinder.
  • the wheels are mounted on the shafts of the other cylinders in a similar manner.
  • the wheel 11 for driving the cylinder 1 is fixed on a sleeve 14 integral in rotation with the shaft 10.
  • the sleeve 14 is provided, towards the outside, with an extension 140 providing a smooth range 141 for centering of the intermediate wheel 12.
  • the wheel 12 is simply adjusted relative to the bearing 140 but is not linked in rotation to the shaft 1.
  • the wheel 12 transmits the movement received from the wheel 32 without influence the rotation of the shaft 1.
  • the other plate cylinder 4 carries at the end of the shaft two inner and outer wheels 41 and 42 respectively mounted in a similar manner to that which has been described for the wheels 31, 32 of the cylinder 3, this arrangement comprising in particular a device register adjustment known per se.
  • the two plate cylinders 3 and 4 are driven in synchronism from the drive wheel 81.
  • each of the plate cylinders 3, 4 drives the Blanchet cylinder which corresponds to it respectively 1 and 2, and the register setting of each plate cylinder has an influence only on the corresponding Blanchet cylinder.
  • each Blanchet cylinder remains completely independent of the plate cylinder which does not correspond to it.
  • the arrangement according to the invention it is therefore possible, by means of a simple and space-saving device to individually adjust the register of each plate cylinder without interference on the Blanchet cylinder which does not correspond to it.
  • each of the plate cylinders 3 or 4 is associated with a set inking rollers 5 or 6 which are driven from the corresponding plate cylinder by means of a clutch.
  • each of the plate cylinders constitutes the driving element for all the elements associated with it, the two plate cylinders being driven from the same driving shaft.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
EP19800400792 1979-06-08 1980-06-03 Dispositif de commande des cylindres d'une machine d'imprimerie offset Expired EP0022381B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7914766 1979-06-08
FR7914766A FR2458395A1 (fr) 1979-06-08 1979-06-08 Dispositif de commande des cylindres d'une machine d'imprimerie offset

Publications (2)

Publication Number Publication Date
EP0022381A1 EP0022381A1 (fr) 1981-01-14
EP0022381B1 true EP0022381B1 (fr) 1983-07-13

Family

ID=9226393

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800400792 Expired EP0022381B1 (fr) 1979-06-08 1980-06-03 Dispositif de commande des cylindres d'une machine d'imprimerie offset

Country Status (3)

Country Link
EP (1) EP0022381B1 (OSRAM)
DE (2) DE3064103D1 (OSRAM)
FR (1) FR2458395A1 (OSRAM)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8109472U1 (de) * 1981-03-31 1981-08-13 Heidelberger Druckmaschinen Ag, 6900 Heidelberg "hauptantrieb fuer rotations-offsetdruckmaschinen"
DE19629605C2 (de) * 1996-07-23 2000-02-03 Koenig & Bauer Ag Antrieb einer Druckeinheit

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2014753C3 (de) * 1970-03-26 1974-01-10 Roland Offsetmaschinenfabrik Faber & Schleicher Ag, 6050 Offenbach Antrieb einer Rotationsdruckmaschine
DE2637795C2 (de) * 1976-08-21 1981-12-24 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Hauptantrieb für Rollenrotations-Offsetdruckmaschinen

Also Published As

Publication number Publication date
FR2458395B1 (OSRAM) 1983-08-05
EP0022381A1 (fr) 1981-01-14
DE3064103D1 (en) 1983-08-18
DE8014985U1 (de) 1980-09-04
FR2458395A1 (fr) 1981-01-02

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