EP1798032A2 - Driving device for a printing machine - Google Patents

Abstract

The printing press drive has a freely rotatable drive wheel on the platen/form cylinder (6, 10) and a mechanically coupled transfer transmission adjacent to this drive wheel. There is an input drive for on the said drive wheel actuated by the transfer transmission. In the first transfer stage, the transfer is synchronous at 1:1, and in at least one second stage, it is asynchronous at a different ratio with slow or fast drive to the inking mechanism (7).

Description

The invention relates to a drive for a processing machine, in particular for a printing machine with at least one printing plate having a plate or forme cylinder, according to the preamble of the independent claim 1.

A drive of this kind is out DE 42 41 807 A1 known. In this drive for a printing press, the printing units are coupled via a gear train (gear transmission) on the drive side. A motor-driven gear train is provided for all cylinder transporting the printing material, in particular the blanket cylinder and all cylinders leading to the printing material (eg printing cylinder, beater, storage drum, transfer drum). Furthermore, each plate cylinder is coupled on the drive side with the first gear train.

There is another separate drive for the non-transport of the respective printing material serving components, in particular provided the inking unit. The drive designs have encoders for the movement variables and are circuit-coupled with a control / regulating device. By this drive, the influence of the drive train of all not used to promote the printing media devices to the synchrony should be reduced.

A disadvantage of this drive training that the cylinders are connected together within the individual printing units and the interposed cylinder / drums for the transport of substrate via a common gear train. As a result, automated processes to be carried out within or outside of the printing operation, for example the cleaning of cylinders or rollers, the replacement of printing plates or the making of circumferential register corrections, can not be carried out in succession or only in terms of time.

Another drive is off EP 0 834 398 A1 which allows a high degree of flexibility with regard to simultaneous or out-of-phase executable processes in a sheet-fed press. Serving the sheet transport cylinder or drums and arranged in the individual printing plate or forme cylinder can be driven by a common gear train of at least one drive motor of a main drive. The plate or forme cylinders are each assigned a remote-controlled separate drive, by means of which the plate or forme cylinder can be driven independently of the drive of the remaining cylinders or drums as a function of the switching states of the clutches in a predetermined manner. In this case, the clutch assigned to a plate / forme cylinder is preferably arranged in the drive train between blanket cylinder and plate cylinder or forme cylinder.

The invention is based on the object to provide a drive of the type mentioned above, which is universally applicable in addition to the printing operation, especially in setup mode and reduces setup times noticeably.

The problem is solved by the training features of independent claim 1. Further developments will be apparent from the dependent claims.

A first advantage of the invention is that - starting from a main drive with common gear train for the substrate transporting cylinders and drums and arranged in the individual printing units plate or forme cylinder - such a drive to reduce set-up times in a processing machine, in particular in offset printing machines or flexographic printing presses and combinations thereof, can be used. Preference is given to a set-up time reduction in inking unit washing, the ink inlet in the inking unit and, if necessary, the simultaneous washing of blanket cylinder and of the printing material leading impression cylinder.

As a second advantage can be mentioned that per printing unit to drive a plate cylinder or a forme cylinder, a transmission gear, for example in an offset printing unit with plate cylinder or a flexographic printing unit with forme cylinder, is provided, by which the respective plate or forme cylinder with the main drive and a common gear train (for all the printing substrate realizing cylinder or drums, including blanket cylinder), without additional auxiliary drive, permanent is coupled.

The main drive with common gear train (closed gear train) ensures the printing operation of all printing units. Preferably, a transmission gear is arranged at each, alternatively only to individual, plate / forming cylinders of the printing units and designed such that a translation stage (first stage) always translated directly (1: 1) and at least one further translation stage with a deviating from the direct translation Level (second level) translated. The input from the main drive and gear train in the respective printing unit drive is thus transmitted by transmission gear on the respective plate / forme cylinder directly (1: 1) or with a different (1 ≠ 1), in particular higher (1: <1) translation stage.

For the preparation of set-up operations, in particular the inking unit washing or the ink inlet, on a printing unit by means of the transfer gear plate / forme cylinder and the inking unit, if necessary, the dampening unit, preferably with significantly higher speeds compared to the washing of the blanket cylinder or the the printing material transporting printing cylinder conventional speeds drivable. Thus, the times for cleaning of the inking unit or inking unit and plate / forme cylinder, as needed for cleaning the dampening unit can be significantly reduced.

• ein Waschen der Farbwerkswalzen bei vom Platten-/Formzylinder abgestellten Auftragwalzen mit einer zu der von Hauptantrieb und Räderzug eingespeisten Antriebsdrehzahl höheren Drehzahl realisierbar;
• ein Waschen der Farbwerkswalzen (bei angestellten Auftragwalzen) gemeinsam mit dem Platten-/Formzylinder mit einer zu der von Hauptantrieb und Räderzug eingespeisten Antriebsdrehzahl höheren Drehzahl realisierbar;
• ein Farbeinlauf in ein Farbwerk mit einer zu der von Hauptantrieb und Räderzug eingespeisten Antriebsdrehzahl höheren Drehzahl realisierbar;
• ein paralleles Waschen von Gummituchzylinder und/oder den Bedruckstoff führenden Druckzylinder mit einer von Hauptantrieb und Räderzug eingespeisten Antriebsdrehzahl realisierbar.

By means of the transmission gear is, for example:

• a washing of the inking rollers when parked by the plate / forme cylinder application rollers with a fed to that of the main drive and gear train input speed higher speed feasible;
• a washing of the inking rollers (at busy application rollers) together with the plate / forme cylinder with a to the main drive and gear train fed input speed higher speed feasible;
• a Farbeinlauf in an inking with a to the input of the main drive and gear train input speed higher speed feasible;
• a parallel washing of blanket cylinder and / or the printing material leading pressure cylinder with a fed from the main drive and gear train drive speed feasible.

For this purpose, if necessary, for example, in the contact points of plate / forme cylinder and blanket cylinder or between blanket cylinder and pressure cylinder to make a separation.

For the realization of the invention, all types of transmission gears, such as planetary gear or bevel gear, gearboxes or compact Harmonic drive type can be used.

Fig.1

eine Bogenrotationsdruckmaschine mit einem Druckwerk und einem Lackwerk,

Fig. 2

einen Antrieb für einen Platten-/Formzylinder. Ausbildung,

The invention will be explained in more detail using an exemplary embodiment. Here are shown schematically:

Fig.1

a sheet-fed rotary printing machine with a printing unit and a coating unit,

Fig. 2

a drive for a plate / forme cylinder. Education,

The sheet-fed rotary printing machine shown in Figure 1 comprises at least one printing unit 1, which is formed as an offset printing unit in a known manner by a plate cylinder 6 with associated inking unit 7 and a blanket cylinder 8. If necessary, the plate cylinder 6 is associated with a dampening unit in the direction of rotation in front of the inking unit 7. The sheet-fed rotary printing press further comprises at least one coating unit or flexographic printing unit 2, which by a Form cylinder 10 and a metering system 11, 12 is formed. In the present example, the metering system 11, 12 comprises in a known manner a screened applicator roll 11 and a chamber doctor blade system 12 for the processing of lacquer, alternatively flexographic ink.

For the transport of the sheet-shaped substrate in the conveying direction 5, a plurality of transport cylinders 9, designed here as a sheet guiding cylinder with gripper systems, arranged. The paint / flexographic printing unit 2 is followed by a boom 3 with circulating conveyor system 4 for conveying the sheet-shaped substrate and its subsequent storage on a stack in the conveying direction 5.

In Figure 2, the drive device for the plate cylinder 6 and the associated inking unit 7 of a printing unit 1 is shown. In each case a side frame 17 of the printing unit 1, the plate cylinder 6 is rotatably mounted in each case in an eccentric 20. In an eccentric bearing 20, a pin 21 of the plate cylinder 6 is accommodated. On the outside of the side frame 17, the pin 21 is fixedly connected to a leading to the inking unit 7 output gear 16. On the pin 21, a bearing 22 is arranged, which receives a freely rotatable drive wheel 13. Adjacent to the freely rotatable drive wheel 13, a transmission gear 18 is arranged, which is operable at least in two gear ratios.
The plate cylinder 6 associated, on the pin 21 freely rotatable drive wheel 13 is connected to a upstream drive wheel 14 of the gear train of the main drive of the printing machine in constant mesh. In a printing unit 1, in particular an offset printing unit, this drive wheel 14 is fixedly connected to the blanket cylinder 8. On the respective drive wheel 14 is from the main drive with gear train and at least one drive motor einzufisbar 15 and the freely rotatable drive wheel 13 via the transmission gear 18 via the pin 21 and the output gear 16, an output 19 on a downstream inking unit 7 derived.

At each plate cylinder 6 of the printing units 1 is ever a transmission gear 18th arranged and designed such that a translation stage (first stage) always an input drive 15 synchronously (1: 1) translates and at least another translation stage with a deviating from this translation stage (second stage) asynchronous (1 ≠ 1) translated.
In a broad training only individual plate cylinder 6 can be coupled in the printing machine with such a transmission gear 18. Each transmission 18 are associated with two clutches K ₁ and K ₂ . Both clutches K ₁ , K ₂ are at least with a control device (not shown) circuitry coupled and can be controlled via appropriate signals.

In the present example, a transmission gear 18 comprises a planetary gear. The planetary gear comprises at least one arranged on a collar 26 of the freely rotatable drive wheel 13 planetary gear 25 and a fixed pin 21 on the sun gear 24 and a stationary with the planetary gears 25 engaged ring gear 23rd

In printing operation, the input from the drive 15 (drive wheel 14) fed machine speed is transmitted to the freely rotatable drive wheel 13. By means of the actuated first clutch K ₁ , the drive wheel 13 is coupled to the ring gear 23. About at least one planetary gear 25 is on the fixed pin 21 on the sun gear 24 and the pin 21 on the output gear 16 of the output 19 in a first gear ratio (1: 1) in the inking unit 7, if necessary, continue to the dampening unit, derived synchronously ,

In cleaning operation or at the ink inlet, the input from the drive 15 (drive wheel 14) fed machine speed is transmitted to the freely rotatable drive wheel 13. The created by means of the first clutch K ₁ connection was disconnected, and the second clutch K _{2 is} actuated. By means of the second clutch K ₂ , the ring gear 23 of the transmission gear 18 is fixed to the side frame 17. In a further embodiment, the ring gear 23 may be displaceable axially parallel to the plate cylinder 6. From the freely rotatable drive wheel 13th is on the at least one planetary gear 25 fixed to the pin 21 sun gear 24 and the pin 21 on the output gear 16 of the output 19 asynchronous to input 15 in a second, especially higher gear ratio (1: <1) in the inking unit 7, If necessary, continue to the dampening unit, derived.

The input from the main drive and gear train in the respective printing unit 1 drive (input 15) is thus synchronized by means of transmission gear 18 on the respective plate / forme cylinder 6 in a first gear ratio (1: 1) or with a different, especially higher gear ratio (1: < 1).
For the preparation of setup operations, especially the inking unit washing (cleaning operation) or the ink inlet to a printing unit 1 is by means of the transfer gear 18 of the plate / forme cylinder 6 and the inking unit 7, if necessary, the dampening unit, with significantly higher speeds compared to the Washing the blanket cylinder 8 or the printing material transporting printing cylinder 9 conventional speeds drivable.

For example, in the printing operation of the main drive and gear train a drive 15 with a machine speed of n = 2000 ^-1 supplied to the transmission gear 18 and derived synchronously in the first gear stage via the output 19 in the inking unit 7.
For example, in the cleaning operation of the inking unit 7 or at the ink inlet of the main drive and gear train a drive 15 with a machine speed of n = 2000 ^-1 the transmission gear 18 and in the second gear stage with a translation to speed via the output 19, the forwarding example, a speed of n = 5000 ^-1 (1: 2.5) in the inking unit 7. Alternatively, in the cleaning operation of the main drive and gear train a drive 15 with a machine speed of n = 3500 ^-1 supplied to the transmission gear 18 and in the second gear stage with a translation Rapidly via the output 19, the forwarding, for example, a speed of n = 10500 ^-1 (1: 3) in the inking unit. 7
At the machine speeds generated by the main drive and gear train can the blanket cylinder 8 and / or the printing cylinder 9 thus be cleaned with respect to those in the cleaning operation of the inking unit 7 and at the ink inlet noticeably lower speeds.

LIST OF REFERENCE NUMBERS

1

printing unit

2

Coating unit / flexographic printing unit

3

boom

4

conveyor system

5

conveying direction

6

plate cylinder

7

inking

8th

Blanket cylinder

9

transport cylinder

10

form cylinder

11

applicator roll

12

Chambered doctor blade system

13

freely rotatable drive wheel

14

drive wheel

15

input drive

16

output gear

17

side frame

18

transmission gear

19

output

20

eccentric

21

spigot

22

storage

23

ring gear

24

sun

25

planet

26

Federation

K ₁

first clutch

K ₂

second clutch

Claims (6)

Drive for a processing machine, in particular for a printing press with at least one printing plate having a plate / forme cylinder, wherein the individual cylinders and / or drums for the transport of printing material and arranged in the individual works plate cylinder or forme cylinder via a common gear train of at least one Drive motor of a main drive and associated machine control can be driven,
characterized,
that in a plate / form cylinder (6, 10) a freely rotatable drive wheel (13) and adjacent to the drive wheel (13) mechanically coupled to a transmission gear (18) is arranged,
that from the main drive with gear train a drive (15) on the freely rotatable drive wheel (13) can be fed and transmitted to the transmission gear (18), and
that by means of transmission gear (18) of the fed-in drive (15) - In a first translation stage synchronously (1: 1) on the plate / forme cylinder (6, 10) is transferable and as an output (19) to a downstream inking unit (7) derivable or - In at least one second translation stage asynchronously (1 ≠ 1) on the plate / forme cylinder (6, 10) is transferable and as output (19) in the slow or fast to a downstream inking unit (7) can be derived. Drive according to claim 1,
characterized,
that the input drive (15) in the second transmission stage into the fast (1: <1) to the inking unit (7) is derivable. Drive according to claim 1,
characterized,
that the transmission gear (18) is coupled in the first operating mode by means of a first clutch (K ₁₎ with the freely rotatable drive gear (13) and lifted, the coupling in the second mode and the transmission gear (18) with a second shift clutch (K ₂₎ on a side frame (17) is fixable. Drive according to claim 1,
characterized,
that the clutches (K ₁ , K ₂ ) are connected in circuit technology with a machine control. Drive according to claim 1,
characterized,
that the transmission gear (18) is rotatably mounted on a collar (26) of the freely rotatable drive wheel (13). Drive according to claim 1,
characterized,
that the transmission gear (18) is a planetary gear.

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