DE29824662U1 - Drives for a cylinder of a rotary printing press - Google Patents

Description

Drive for a cylinder of a rotary printing press

The invention relates to a drive for a cylinder of a rotary printing press according to the preamble of claim 1.

EP 06 44 048 A2 describes a drive of a cylinder group of an offset rotary printing machine by means of a toothed belt.

DE 37 04 314 Cl describes an arrangement for adjusting the tooth play between the drive wheels of sheet-transporting cylinders of a rotary printing press. Each cylinder is pivotably mounted in eccentric bushings.

The invention is based on the object of creating a drive for a cylinder of a rotary printing press.

The object is achieved according to the invention by the features of claim 1.

The advantages that can be achieved with the invention are, in particular, that in the case of cylinders whose axis of rotation can be changed in location or position, a change in the tooth play between a gear of the cylinder and an associated drive pinion is minimized when the position is changed.

An embodiment of the invention is shown in the drawing and is described in more detail below.

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Show it:

Fig. 1 is a schematic side view of a cylinder drive;

Fig. 2 is a schematic plan view of a drive of the cylinder;

Fig. 3 is an enlarged detail according to Fig. 1.

A pin 01 of a rotating component 02, e.g. a roller of an inking or dampening unit or a cylinder 02 of a printing unit or folding apparatus of a rotary printing press, is mounted in a side frame 03 by means of an eccentric bushing 04 so that it can be moved. The pin 01 of the cylinder 02 is mounted in a bore 07 of the eccentric bushing 04 by means of a bearing 06. A longitudinal axis 08 of this bore 07 of the eccentric bushing 04, i.e. the axis of rotation 08 of the cylinder 02, is offset by an eccentricity e4 from a longitudinal axis 09 of an outer surface 11, i.e. a pivot axis 09 of the eccentric bushing 04. This eccentric bushing 04 is arranged so that it can pivot in the side frame 03 by means of a drive (not shown). A first, e.g. straight-toothed gear 12 and a second, e.g. helical-toothed gear 13, e.g. a drive gear 13, are arranged on the pin 01 of the cylinder 02.

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In the present embodiment, this cylinder 02 is designed as a transfer cylinder 02 of a printing unit of an offset rotary printing machine. A forme cylinder 14 is assigned to this transfer cylinder 02. This forme cylinder 14 is provided with a spur gear 17 on its pin 16. The gear 12 of the transfer cylinder 02 and the gear 17 of the forme cylinder 14 are in engagement with one another, so that the transfer cylinder 02 and the forme cylinder 14 are positively coupled to the drive via the gears 12; 17 and form a cylinder pair 28.

This cylinder pair 28 is preferably not positively coupled to other cylinders for driving.

The second gear 13 of the transfer cylinder 02 is assigned a drive pinion 18. This drive pinion

18 is arranged, for example, directly on a rotor 19 of a position and/or speed-controlled motor 21. The motor 21 is arranged fixed to the frame. The

Drive pinion I 18 can also have its own, from the rotor

19 of the motor 21 have independent bearings and are connected to the rotor 19 of the motor 21 via a coupling. Additional gears can be interposed between the drive pinion 18 connected to the rotor 19 of the motor 21 and the gear 13 of the transfer cylinder 02. Preferably, the drive pinion 18 associated with the rotor 19 of the motor 21 engages

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directly into the gear 13 of the transfer cylinder 02.

A first straight line 22 is defined by a rotation axis 23 of the drive pinion 18 and the pivot axis 09 of the eccentric bushing 04.

A second straight line 24 runs through the rotation axis 08 of the cylinder 02 and the pivot axis 09 of the eccentric bushing 04 in the pressure-on position.

In the pressure-down position, the rotation axis 08 is shifted to a position 08 ¹ and a straight line 24' runs through the rotation axis 08*.

The first straight line 22 and the second straight line 24 or 24' enclose an opening angle Alpha or Alpha ¹ in the pressure-on position and in the pressure-off position.

An amount of this opening angle Alpha, e.g. 15° in the pressure-on position, is approximately equal (maximum difference |Alpha - Alpha ¹ | < 10%, preferably 5°) to an amount of the opening angle Alpha ¹ , e.g. -15°, in the pressure-off position.

The first straight line 22 and the second straight line 24 or 24' enclose an opening angle Alpha or Alpha ¹ in the range of +/- 20°.

In the "Press-Off" position, a rotation axis 23 of a

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Drive pinion 18, a pivot axis 09 of the eccentric bushing 04 and a rotation axis 08 of the cylinder 02 approximately on a common straight line.

A third straight line 26 is defined by a rotation axis 27 of a second cylinder 14, e.g. the form cylinder 14 and the rotation axis 23 of the drive pinion 18. This third straight line 26 and the first straight line 22 enclose an opening angle Beta of 160° to 200°.

If the transfer cylinder 02 is switched on or off from the forme cylinder 14 by pivoting the eccentric bushing 04, the change in the tooth play between the drive pinion 18 and the gear 13 of the transfer cylinder 02 is minimal.

In the present embodiment, the drive pinion 18 is assigned to the transfer cylinder 02 . It is also possible to assign the drive pinion 18 to the forme cylinder 14.

In the present embodiment, the printing unit is designed as a so-called bridge printing unit. In this bridge printing unit, a

transfer cylinder 02 of the first cylinder pair 28 with a transfer cylinder 02 of a second cylinder pair 29. These two cylinder pairs 28; 29 are preferably not positively coupled to one another for the drive.

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This cylinder pair 28 can also be used in so-called H-pressure units or satellite pressure units used

become.

It is also possible to use only a single cylinder 02

or a plurality of connected to drive positively coupled cylinder by means of a drive pinion 18 arranged according to the invention to rub.

Instead of the drive pinion 18 and the drive wheel 13 of the cylinder 02, pulleys can also be arranged whose axes of rotation are arranged corresponding to the axes of rotation of the gear wheels.

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List of reference symbols

01 Cone

02 Cylinder/ transfer cylinder

03 Side frame

04 Eccentric bushing

05 -

06 Warehouse

07 Drilling (04)

08 Longitudinal axis (07), rotation axis (02)

09 Longitudinal axis (11)/ swivel axis (04)

10 -

11 Shell surface (04)

12 Gear (02)

13 Drive wheel/gear (02)

14 form cylinders

15 -

16 cones (14)

17 Gear (14)

18 drive pinion

19 Rotor

20 -

21 Engine

22 Straight (04; 18)

23 Rotation axis (18)

24 Straight (02; 04)

25 -

26 Straight (18; 14)

27 Rotation axis (14)

·

·

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28 cylinder pair/ first

29 Cylinder pair/ second

08' Rotary axis 2V Straight

e4 Eccentricity

Alpha opening angle Beta opening angle

Alpha ¹ opening angle

Claims (9)

1. Drive for a cylinder (02) of a rotary printing machine mounted in an eccentric bushing (04), wherein a drive wheel ( 13 ) is provided on a pin (01) of the cylinder (02), wherein a drive pinion ( 18 ) cooperates with the drive wheel ( 13 ), wherein a straight line ( 22 ) defined by a rotation axis ( 23 ) of the drive pinion ( 18 ) and a pivot axis (09) of the eccentric bushing (04) encloses an opening angle (alpha) in the range from +20° to -20° with a straight line ( 24 ) defined by the pivot axis (09) of the eccentric bushing (04) and the rotation axis (08) of the cylinder (02), characterized in that a straight line (22) defined by a rotation axis ( 27 ) of a second cylinder ( 14 ) and the rotation axis ( 23 ) of the drive pinion ( 18 ) ) defines an opening angle ( Beta) in the range from 160° to 200° with the straight line (22 ) defined by the axis of rotation (23 ) of the drive pinion ( 18 ) and the pivot axis (09) of the eccentric bush (04), that the two cylinders (02; 14) are designed as directly interacting form and transfer cylinders and form a cylinder pair. 2. Drive according to claim 1, characterized in that an amount of an opening angle (Alpha) in the "pressure-on" position is approximately equal to an amount of an opening angle (Alpha') in the "pressure-off" position. 3. Drive according to claim 1, characterized in that the drive wheels ( 12 ; 13 ; 17 ; 18 ) are designed as gear wheels ( 12 ; 13 ; 17 ; 18 ). 4. Drive according to claim 1, characterized in that the cylinder (02) is designed as a transfer cylinder (02) of an offset rotary printing machine. 5. Drive according to claim 1, characterized in that the cylinder (02) is designed as a forme cylinder ( 14 ). 6. Drive according to claim 1, characterized in that the cylinder (02) is designed as a counterpressure or satellite cylinder. 7. Drive according to claim 4, characterized in that a forme cylinder ( 14 ) is positively coupled to the transfer cylinder (02). 8. Drive according to claim 1, characterized in that a rotation axis (08) of the first cylinder (02), the pivot axis (09) of the eccentric bushing (04) and a rotation axis ( 27 ) of a second cylinder ( 14 ) in the "pressure-down" position lie approximately on a common straight line ( 24 '). 9. Drive according to claim 7, characterized in that an axis of rotation (08) of the transfer cylinder (02) lies approximately on a straight line ( 26 ) defined by an axis of rotation ( 23 ) of the drive pinion ( 18 ) and an axis of rotation ( 27 ) of the forme cylinder ( 14 ).