EP1068955B1 - Device for changing the amplitude of the axial oscillation of an inking roller in a rotary printing machine - Google Patents

Description

The invention relates to a device for changing the stroke amplitude of a Rubbing roller in a rotary printing press, according to the preamble of claim 1.

Devices are used to change the stroke size of the lateral rubbing used with which the stroke of a rotating friction roller with the inking unit running can be increased and decreased.

DE 36 29 825 A1 describes a device for axially adjusting the friction rollers with which the axial movement of the friction rollers from 0 to a maximum and a regulation segment with a drive groove includes. The regulating segment can be rotated on an axis in a side wall stored. However, such a device takes up a lot of space. There is also a sudden change between a minimum stroke and one Maximum stroke not possible because the twisting and locking of the Regulating segment using the gears still takes a relatively long time.

In US 4,513,663 a device for changing the axial stroke is one Distributor roller described. In this device, one of the Printing machine drive via a shaft on an eccentric on the shaft articulated paddock transmitted drive movement from the paddock to a Transfer swinging link, which is hinged to the coupling by means of a pin. The one that swings around a first joint due to this drive movement The vibrating backdrop in turn transmits the drive movement to a sliding block. The sliding block attached to a swivel lever transmits the from the Vibrating link received drive movement on the swivel lever, so that this swings back and forth around a second joint. A motor turns an angle lever about an axis, whereby the one articulated on the angle lever via the first joint Vibration setting is adjusted while doing a compensating movement around the pin performs. The motor is not carried by the coupling or by the swivel lever and is rather arranged on a machine frame.

In DE 25 07 179 C2, referred to in the preamble of claim 1 is described, a drive device for oscillating friction rollers, which the shortcomings of the prior art described last not eliminated. The drive device comprises a four-link chain, at the Drive member is formed a link guide, in which a as a sliding block trained end point of a four-bar coupling engages. The backdrop is not adjustable relative to the drive link.

The invention is therefore based on the task, a responsive and little Space-consuming device for changing the stroke amplitude of a To create a grater.

The object is achieved by a device having the features of claim 1.

The inventive device for changing the stroke amplitude at least an axially oscillating friction roller in an order unit - especially in Inking unit - a rotary printing machine, whereby the distribution roller by a The friction stroke drive can be driven via a friction stroke gear, which is a backdrop a groove and a movable in the groove sliding block and wherein the Backdrop of a first gear link and the backdrop block of a second Transmission link of the friction lifting gear is carried and both transmission links can be driven by the friction stroke drive, characterized in that the Backdrop from a first position to a second position relative to the first Gear member is arranged adjustable and that the actuator of at least one of the transmission links is worn.

The device enables a very rapid change in the stroke amplitude of the friction roller with low actuating forces to be applied by the actuator for adjustment. According to the invention, the link guide functions as a driver which can be adjusted selectively, in particular from a first to a second position and from the second to the first position. By combining the backdrop with the sliding block, an oscillating drive movement - depending
after whether the link or the link which carries the link is the driving or the driven link - be transferred from the first link to the second link or from the second link to the first link. Due to the arrangement of the link on a first movable transmission link and the sliding block on a second movable transmission link of the friction lifting gear and the adjustability of the link relative to the transmission link carrying this, the installation space can be better utilized and the production effort due to a simplified construction of the friction lifting gear especially with regard to the linkage be lowered.

Below a groove, both a groove with a bottom surface (base) and an elongated hole without floor space and under a sliding block both a sliding block be understood as a role as well. The sliding block can be circular (e.g. bolt) or polygonal (e.g. square) cross section.

In a particularly advantageous embodiment of the device according to the invention can be provided that the backdrop of an actuator from the first in the second position is adjustable, the actuator being electronic Control device can be controlled. As an actuator z. B. electromagnetic actuators as well as pneumatic and hydraulic piston-cylinder units be used. The use of a double-acting or Pneumatic cylinder which can be acted upon in both directions is advantageous since the Backdrop with this can be held very securely in the appropriate positions can. The device according to the invention is in sheet-fed and web-fed rotary printing machines used.

Further features of the invention are contained in the subclaims.

The invention is described below with reference to the drawing based on several Embodiments described.

Fig. 1

eine schematische Darstellung einer Bogenoffsetrotationsdruckmaschine mit elektronischer Steuereinrichtung,

Fig. 2

eine detailliertere schematische Darstellung des Farbwerkes und des Feuchtwerks der Druckmaschine aus Fig. 1,

Fig. 3

eine schematisch dargestellte Vorrichtung zur Veränderung der Hubamplitude einer Reibwalze,

Fig. 4

eine schematische Darstellung einer bevorzugten Ausführungsform der erfindungsgemäßen Vorrichtung,

Fig. 5

eine detailliertere schematische Darstellung eines Hebels der Vorrichtung aus Fig. 4,

Fig. 6

eine schematische Darstellung einer vorteilhaften Ausbildung der Kulisse,

Fig. 7

eine schematische Darstellung der Lagerung des Hebels aus Fig. 5 und

Fig. 8

einen Programmablaufplan, nach welchem die elektronische Steuereinrichtung der Druckmaschine die erfindungsgemäße Vorrichtung zur Durchführung eines Verfahrens ansteuert.

In the drawings:

Fig. 1

1 shows a schematic representation of a sheet-fed offset rotary printing machine with an electronic control device,

Fig. 2

2 shows a more detailed schematic illustration of the inking unit and the dampening unit of the printing press from FIG. 1,

Fig. 3

1 shows a schematically illustrated device for changing the stroke amplitude of a friction roller,

Fig. 4

2 shows a schematic representation of a preferred embodiment of the device according to the invention,

Fig. 5

4 shows a more detailed schematic representation of a lever of the device from FIG. 4,

Fig. 6

a schematic representation of an advantageous embodiment of the backdrop,

Fig. 7

is a schematic representation of the bearing of the lever of Fig. 5 and

Fig. 8

a program flow chart according to which the electronic control device of the printing press controls the device according to the invention for carrying out a method.

Identical or functionally identical parts are generally the same in the figures Provide reference numerals.

1 shows a sheet-fed rotary printing press 1 with a plurality of printing units 2 shown. Each printing unit 2 comprises a planographic printing device which, like shown, from the printing form cylinder 3, the blanket cylinder 4 and the Impression cylinder 5 can exist. Each printing unit also contains 2 Inking unit 6 and a dampening unit 7, which are shown in simplified form in FIG. 1. The printing press 1 is supported by a central electronic control device 8 controlled by a microprocessor 9. The operator can control the processes check and influence the control panel 10. The control device 8 controls the Printing units 2 and in particular the on and off movements of the cylinders 3, 4, 5 to each other as well as the inking unit 6 and the dampening unit 7 of each printing unit 2.

In Fig. 2, the inking unit 6 and the dampening unit 7 of the printing press 1 are from the Fig. 1 shown in more detail. The ink is in one of the ink fountain 11 and the ink fountain roller 12 stored ink reservoir. The ink fountain 11 is equipped with a metering device 13 for zonal printing ink metering, which are lined up next to each other parallel to the ink fountain roller axis zone-wide control elements. The reciprocating jack roller 14 transmits a profile with different directions perpendicular to the printing direction Color layer thicknesses in the individual zonal metering areas Printing ink from the ink fountain roller 13 onto the first inking roller 15. In addition this includes the inking unit 6 a second, third and fourth driven Rubbing roller 16, 17, 18, a first seen in the direction of rotation of the printing form cylinder 3 Ink application roller 19 and further ink application rollers 20, 21, 22 for application the printing ink on the printing form 23. The dampening unit 7 comprises a basin-shaped Dampening solution reservoir 24, in which the dipping roller 25 is partially immersed. On the latter, the metering roller 26 is employed under contact. The dip roller 25 and the Metering roller 26 can be driven at a variable speed, so that on this Way the dampening solution flow rate, z. B. the amount of dampening solution per Machine revolution is changeable, so that the inking unit 6 during the Pre-humidification an increased amount of dampening solution compared to printing can be supplied within a short time. In addition, the speed of the Rolls 25, 26 with the printing machine speed depending on this be carried along, thus a constant minimum humidification with each Machine speed is guaranteed. The one with printing form cylinder speed rotating dampening roller 27 and the slower rotating metering roller 26 are in contact with each other to form a gap with slip. To the Moist application roller 27, a dampening roller 28 is employed. The intermediate roller 29 is optionally on the inking roller 19 and / or the dampening roller 27 unemployable. The inking unit 6 and the dampening unit 7 can be integrated in the mode Moisture "operated, the inking roller 19 and the Dampening roller 27 placed on the printing form 23 and by the Intermediate roller 29 are connected. In this mode, the inking roller 19 carries a color dampening solution emulsion. In the "separate dampening" mode it is Intermediate roller 29 separated from at least one of the application rollers 19, 27. When by at least one roller, e.g. B. the intermediate roller 29 together connected inking unit 6 and dampening unit 7 can pre-wet the Inking unit 6 take place, the inking rollers 19 - 22 from the printing form 23 are turned off. The dampening roller 27 can be switched off from the printing form or, in particular when the printing starts soon, be employed on the printing form. However, the dampening solution can be pre-moistened with the inking unit different inking roller combinations are supplied. Furthermore, a pre-wetting of the inking unit 6 without this with the dampening unit 7 connecting roller take place via the printing form 23.

The automatic control 8 shown in FIG. 1 controls when starting up and after a machine stop the precise sequence of all functions and stops the desired amount of dampening solution for each during printing Speed exactly one. The inking unit 6 and the printing form 23 are programmed pre-moistened. The control device 8 controls roller position, especially the turning on and off of the inking rollers 15-18, and Dampening solution dosing in every phase. When printing is interrupted, everyone can Ink and dampening rollers 19 - 22, 27 can be switched off from the printing form 23. When restarting, the automatic control triggers all the necessary functions automatically, that is the pre-moistening of the printing form 23 and the inking unit 6 About the intermediate roller 29 with the dampening roller 27 and the Production printing with speed-compensated dampening. After pre-wetting can then also automatically apply the inking rollers 15-18 to the Printing form 23 to be colored. In the shown in Figure 1 Multi-color printing press 1 runs the one controlled by the control device 8 Automatic of the individual printing units at exactly the right time one after the other so that each dampening unit starts under optimal conditions.

In Fig. 3 a device is shown with which the stroke amplitude of Rubbing rollers z. B. the dampening roller 28 shown in Figure 2 and / or one or can simultaneously change several of the inking rollers 15-18. The shown Example refers to the first in the ink roller relative to the ink flow Ink roller 15, the frame 29, z. B. in the side walls of the printing press, is rotatably mounted. The journal 30 carries the driver 31, which one Transfer of the lifting movement to the rotating inking roller 15 enables. The here cuboid sliding block 32 is on the sliding block joint 34 in the Rod 33 rotatably supported and connected to the driver 31 by the latter. The The friction stroke drive 35 generates an oscillating drive movement with the amplitude H. This drive movement is transmitted through the rod 36 to the backdrop 37, which is rotatably mounted in the rod 36 via the link joint 38. The Link joint 38 is introduced into the bottom of the groove 40. The backdrop 37 is through the actuator 39 from the first position (shown in full line) to the second position (shown in broken lines) and adjustable back. The adjustment of the backdrop 37 relative to the sliding block 32 takes place in the movement phase in which the Link stone joint 34 and the link joint 38 congruent or in alignment stand on top of each other by setting 37 and setting block 38 simultaneously and be rotated together by an angle of 90 °.

The size of the stroke amplitude of the inking roller 15 is in the first position adjusted backdrop 37 different to the stroke amplitude in the second position. ever after the dimensional training of scenery 37 and scenery stone 32 results in In the longitudinal direction and in the width direction of the groove 40, a freewheel of different sizes the difference A - C or B - D of the sliding block 32 in the groove 40 and to the backdrop 37. In the event that the game A - C or B - D is smaller than the size 2 H of double Amplitude of the drive movement, the sliding block 32 is carried along through the backdrop 37 in both directions. If the game A - C or B - D bigger or is the same size, no take-along. To change the stroke amplitude of the The inking roller 15 must assume the constant drive amplitude H Difference A - C not equal to the difference B - D.

In the example shown, the game A - C of z. B. 18 mm assumption slightly, e.g. B. by 2 mm, less than twice the amplitude 2 H of z. B. 20 mm the drive movement, so that the stroke amplitude E of the inking roller 15 in both Directions of movement per 1 mm (minimum stroke) is when the link 37 is the first Holds position. The smooth sliding of the sliding block 32 in Longitudinal enabling play B - D perpendicular to the longitudinal direction is essential less than twice the amplitude 2 H and can with z. B. 0.05 mm practically zero be so that the stroke amplitudes E when the backdrop 37 is in the second position is larger (normal stroke) than when the gate 37 is in the first position and in Example is 20 mm. Of course, the sliding block 32 can also here in the embodiment shown in the following figures, cylindrical be trained. In this case, C and D correspond to the diameter of the Setting stone and to change the stroke amplitude, A must not be equal to B. The the groove 40 in the longitudinal direction delimiting inner surfaces can in this case be semicircular, so that a full-surface meeting of The sliding block 32 and the inner surface of the sliding block take place and wear in the form of knocked out groove 40 is avoided.

4 shows a preferred embodiment of the device according to the invention shown. The inking rollers 15 and 16 shown in Fig. 2 are here axially moved in opposite directions to each other. It can be provided that beyond that further friction rollers are actuated by the device, e.g. B. the in Fig. 2nd shown inking rollers 17, 18 and the dampening roller 28. For the axial Drive and a change in the stroke amplitude of these additional friction rollers can one of the inking rollers 15; 16 with one or more of the other friction rollers be connected in terms of drive via a rocker of a known type (DE 36 29 825). The friction rollers 15, 16 are coupled by the drive 41 via the gear 42 to the rotation of the cylinder 3 of the printing unit rotatively and via the Grater gear 43 driven axially. For the axial and rotary drive two separate drives can also be provided. The The friction lifting gear 43 includes the gears 44-46. The one that functions as a crank Gear 44 forms together with the rod 47 functioning as a crank rod Crank gear 44, 47. The gear 44 has an eccentric to the axis 48 on this arranged crank pin 49, which via the joint 50 with the Rod 47 is connected. The rod 47 is formed with the bolt here Sliding block 32 connected. As shown, this can be in the sliding block joint 34 the rod 47 is rotatably mounted or non-rotatably attached to the rod 47. The Joint 50 and the sliding block joint 34 are each about two axes movable joints trained. As joints are z. B. spherical shells - or Universal joints can be used. The formation of the joints 34, 50 is preferred as Spherical roller bearings or ball bearings, each self-aligning bearing on one eye End of the rod 47 is added. The inner ring center axis of the self-aligning bearing of the joint 50 runs in the image plane and corresponds to the axis of the Crank pin 49 on which the inner ring is seated. The inner ring central axis of the Self-aligning bearing of the joint 34 runs perpendicular to the image plane and corresponds to the Axis of the sliding block 32 on which the latter inner ring sits. The disc-shaped backdrop 37 has a circular arc-shaped elongated hole trained groove 40. The link 37 is in the lever arm 51 of the lever 52 rotatably mounted. The lever 52 has two further lever arms, each of which the drivers 31 are connected to one of the friction rollers 15, 16. The well known Type (DE 36 29 825) trained driver 31 each include a driver roller 53, between two disks attached to the journal 30 or in one Circumferential groove 54 of the journal 30 is guided. The lever 52 is rotatable in the frame 29 mounted, the bracket 55 the lever 52 and the lever axis 56th forming joint. The actuator is arranged on the lever 52 and is supported on an outer lever arm of the three-armed lever 52 and that on the middle Lever arm arranged backdrop 37. The actuator 39 shown is as a preferably designed in two directions acting pneumatic cylinder. The Actuator 39 is dependent on the electronic control device 8 Operating parameters of the printing press controlled. Such a thing Operating parameters can e.g. B. a certain number of revolutions of the Printing form cylinder 3. The control device 8 controls both the drive 41 the printing press or the printing unit and the actuator 39. Furthermore the control device 8 can switch the inking roller 57 on and off control the dampening roller not shown in Figure 4. The controls Control device 8 that turns the application roller 57 on and off Applicator roller actuator 58. It can also be provided that the Drive 58 not only the applicator roller 57, but also the backdrop 37 instead of additional actuator 39 actuated. Furthermore, FIG. 4 is an example for everyone mentioned pneumatic cylinder shown that this from a compressed air source 59 a valve 60 can be supplied with compressed air. Hydraulic can also be used Systems are used. The valve 60 shown is a multi-way valve trained and is controlled by the control device 8, for. B. magnetic actuated. Via the valve 60, the piston rod 61 of the double-acting Pneumatic cylinders can optionally be extended and retracted. The piston rod 61 is connected via a hinge 62 to the backdrop 37, so that this through the Actuator 39 can be rotated around the link joint 34. The angle of twist can be limited by additional stops.

The function is as follows: the rod 47 carries an oscillating thrust and Pull movement from which on the sliding block 32 engaging in the groove 40 the backdrop 37 is transmitted. In the first position of the backdrop 37 shown (with Entrainment) this friction stroke drive movement with a lower idling of the sliding block 32 in the backdrop 37 than in a to the first position in substantially vertical second position not shown (without entrainment) on the Link 37 and the lever 52 transferred. As a result of the lesser or practical missing idle, the lever 52 is carried over a larger one Swivel angle away. The oscillating friction rollers 15, 16 lead z. B. pro two revolutions of the printing form cylinder 3 a full oscillation back and forth a stroke from the center position to a dead center position and back.

The lever 52 thus forms the first gear member and the rod 47 the second Gear member of the friction lifting gear 43, the link 37 relative to the lever 52 is adjustable and in particular rotatable. Both the lever 52 and the Rod 47 are driven by the drive 41. The lever 52 thereby leads an oscillating pivoting movement about its lever axis 56 and shifts the rotating friction rollers 15, 16 simultaneously in opposite axial directions Directions. One of two dead center positions of the system is shown in the figure. To a rotation of the link 37 through an angle of 90 ° in the second Position of the sliding block 32 has a greater idle, so that the backdrop 37 and the lever 52 not at all or back over a smaller swivel angle be moved. Both of the latter cases correspond to the minimum stroke.

In Fig. 5 is the rotatable about the lever axis 56 and the first gear member forming lever 52 shown in more detail. The backdrop 37 is from the lever arm 51st worn and is rotatable about the link axis 64 in the lever arm 51 in the Bore 61 stored. The sliding block 32 has a circular cross section and the groove 40 is in the form of a circular arc and is in the form of an elongated hole. The Inner surfaces 62, 63 are concentric to the second position Lever axis 56. The mean radius 65 of the groove 40 corresponds to the distance between lever axis 56 and link axis 64. The arc length 66 of the middle The radius corresponds to the groove length A of the straight line shown in FIG. 3 extending groove 40. The groove 40 is arranged centrally to the link axis 64. Furthermore, the sliding block 32 is in the two dead center positions oscillating drive movement shown in dash-dotted lines. It can be seen that the Sliding block 32 in its movement over the groove length, for. B. in the case of here circular arc-shaped groove 40 shown by the pivot angle 68 each included arc length runs out. In this way, a minimum stroke of Rubbing rollers 15, 16 of z. B. 1mm are generated. With a longer groove 40 or A drive movement over a shorter distance can cause the swivel angle 68 be zero (striking without a middle name) or the sliding block 32 strikes not at all on the groove inner surfaces lying in its direction of movement. In these cases the minimum stroke of the stroke amplitude of the friction rollers is zero. In Fig. 5 is the first position of the backdrop 37 by the corresponding position of the Groove 40 (shown in dash-dot lines) indicated. In this position there is a Taking the backdrop 37 through the sliding block 32 over a larger path, see above that an increased stroke amplitude of the friction roller compared to the minimum stroke is effected.

6 shows a preferred embodiment of the groove 40. The modification compared to the design shown in Fig. 5 consists in a along the Radius 65 belonging arc about the lever axis 56 displaced position of the Groove 40, so that the lying in the direction of movement of the sliding block 32 rounded inner surface 71 of the groove 40 extends coaxially to the link axis 64. On this can be a particularly quick and safe changeover of the Stroke amplitude can be realized, which is preferably in that shown in Fig. 4 The dead center position of the pushing movement of the rod 47 takes place, the actuator 39 can be activated before reaching this position. Can not continue shown stops can be provided, which the adjustment path or angle of Limit backdrop 37.

In Fig. 7 is a preferred embodiment of the mounting of the lever 52, the Setting stone 32 and the backdrop 37 shown in a side view. The Sliding block 32 is designed as a bolt, which in the rod 47 and in at least one further lever 69 is mounted. Storage and in particular the storage in two further levers 69 serves to stabilize the bearing Sliding block 32 and minimizes the wear of the groove 40 by a Tilting movement of the sliding block 32 in the groove 40 due to the driving force is prevented. In this way, the game between groove 40 and Make the sliding block 32 sufficiently large so that it runs particularly smoothly Adjustment of the backdrop 37 is possible. The storage of the sliding block 32 in the here the second gear member of the friction gear mechanism forming the rod 47 advantageously take place by means of a spherical roller bearing 70.

8 is a program flow chart with the electronic control device 8 to control the operation of the rotary printing press 1 according to an advantageous Procedure to be processed program levels 73 to 81. After the Printer triggered signal by pushing a button takes place in the Program stage 73, parallel to placing the blanket cylinder on the printing form - and impression cylinder 73.1, a stop of the lifting stroke to interrupt the Ink supply 73.2, switching off the inking rollers from the printing form cylinder 73.3, a change of the inking roller from normal stroke to minimum stroke 73.4 and on Deactivating the substrate transport 73.5. In the event that the stroke amplitude by the control device 8 according to the program to a minimum stroke greater than zero is set, if necessary, e.g. B. a looming comparative long lasting pressure interruption, manual stopping of the distribution roller (Stroke amplitude zero) by the printer. This can by a command at the push of a button to the control device 8 or by a mechanical changeover of the device. In the following Program stage 74 is followed by a rewetting of the printing form and on it The following program level 75 is the dampening roller from the printing form cylinder switched off. After the "Print on" signal triggered by the printer at the push of a button there are several parallel processes in program level 76: these are one Place the dampening roller on the printing form cylinder 76.1, an increase the speed of the metering and dipping roller 76.2, a connection between the Inking unit to the dampening unit through the intermediate roller 76.3 and a setting of Ink rubbing roller from minimum stroke to normal stroke. In the following Program stage 77 is a pre-wetting of the printing form 77.1 and the Inking unit 77.2, e.g. B. within three to five machine revolutions. In the following program stage 78, the lifting roller is activated in parallel for supplying ink to the inking unit 78.1, starting the Ink application rollers on the printing form cylinder 78.2, which simultaneously or can be staggered one after the other, adjusting the speed of the dosing and Dip roller on normal operation 78.3 and starting the blanket cylinder the printing form cylinder 78.4. This is followed by pre-inking the printing form in accordance with program level 79, e.g. B. within several machine revolutions. In the Program level 80 is the blanket cylinder on the impression cylinder employed 80.1 and the substrate transfer reactivated 80.2, so that now a Production status according to program level 81 is reached.

LIST OF REFERENCE NUMBERS

1

Sheetfed offset rotary press

2

printing unit

3

Plate cylinder

4

Blanket cylinder

5

Impression cylinder

6

inking

7

dampening

8th

control device

9

microprocessor

10

control panel

11

paintbox

12

Ink fountain roller

13

metering

14

vibrator roller

15 to 18

ink distributor

19 to 22

Inking roller

23

printing form

24

Dampening solution reservoir

25

dipping roller

26

metering

27

Dampener roller

28

dampening

29

frame

30

journal

31

takeaway

32

sliding block

33

pole

34

Sliding block joint

35

Reiberhubantrieb

36

pole

37

scenery

38

backdrop joint

39

actuator

40

groove

41

drive motor

42

transmission

43

Reiberhubgetriebe

44 to 46

gear

47

pole

48

axis

49

crank pin

50

joint

51

lever arm

52

lever

53

tappet roller

54

circumferential groove

55

console

56

lever axis

57

Inking roller

58

Application roller actuator

59

Pressurized fluid source

60

Valve

61

piston rod

62, 63

inner surfaces

64

setting axis

65

radius

66

arc length

67

dead

68

swivel angle

69

lever

70

aligning bearing

71

area

72

drilling

A

Slot length

B

groove width

C, D

Sliding block Dimensions

e

Stroke amplitude of the friction roller

H

Antriebshubamplitute

Claims (11)

1. Device for varying the stroke amplitude of at least one distributor roller (15; 16; 17; 18; 28) that oscillates axially in an applicator unit (6; 7) - in particular in the inking unit (6) - of a rotary printing press, the distributor roller (15; 16; 17; 18; 28) being drivable by a distributor stroke drive (35) via a distributor stroke gearing (43) which includes a guide piece (37) having a groove (40) and a sliding block (32) movable in the groove (40), and the guide piece (37) being carried by a first gearing member (36; 52) and the sliding block (32) being carried by a second gearing member (33; 47) of the distributor stroke gearing (43) and both gearing members (33, 36, 47, 52) being drivable by the distributor stroke drive (35),
   characterized in that
   the guide piece (37) is adjustably arranged from a first position into a second position relative to the first gearing member (52) by means of a servo-drive (39) and that the servo-drive (39) is carried by at least one of the gearing members (33; 36; 47; 52).
2. Device as set forth in claim 1,
   characterized in that
   an oscillating driving motion is transferable from the first gearing member (36, 52) to the second gearing member (33, 47) or from the second gearing member (33, 47) to the first gearing member (36, 52), whereby the guide piece (37) and the sliding block (32) cooperate with one another as a driver.
3. Device as set forth in claim 1 or 2,
   characterized in that
   the first position of the guide piece (37) is substantially perpendicular to the second position.
4. Device as set forth in one of the claims 1 to 3,
   characterized in that
   the servo-drive is carried by the second gearing member (36, 52).
5. Device as set forth in one of the claims 1 to 4,
   characterized in that
   said first gearing member is embodied as a lever (52) pivotable about a lever axis (56).
6. Device as set forth in one of the claims 1 to 5,
   characterized in that
   the guide piece (37) is rotatable about a guide piece axis (64), and the groove (40) has an arch shape.
7. Device as set forth in claim 6,
   characterized in that
   the mean radius (65) of the groove (40) has a length equivalent to the spacing between said lever axis (56) and said guide piece axis (64).
8. Device as set forth in one of the claims 5 to 7,
   characterized in that
   said lever (52) is formed as a multi-armed lever having a lever arm (51) supporting the guide piece (37).
9. Device as set forth in claim 8,
   characterized in that
   said lever (52) is constructed as a lever for moving at least two distributor rollers (15, 16) opposite to one another.
10. Device as set forth in one of the claims 1 to 9,
    characterized in that
    said guide piece (37) is adjustable by the servo-drive (39) which is controlled by an electronic control unit (8).
11. Rotary printing press - in particular rotary offset printing press - having at least one device as set forth in one of the claims 1 to 10.

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