DE102007039222B4 - Device and method for driving a rotary sheet printing machine - Google Patents

Abstract

Device for driving a rotary sheet-fed printing press with at least one printing unit (1), each printing unit (1) having a printing forme cylinder (7) coupled to an individual drive (14), which is connected by a sheet guide cylinder (5), to which a main drive (13) acts, is mechanically decoupled and can be driven by its own motor in a predeterminable manner compared to the sheet guide cylinders (5), the printing forme cylinder (7) being assigned an inking unit (8) which can be driven via the gear train from the main drive (13) via an intermediate shaft (18), and on the printing forme cylinder ( 7) a cylinder gear (16) is fixedly arranged, with a first gear (19) on the intermediate shaft (18), which meshes with the cylinder gear (16), and aligned with this, a second gear (20) connected to the gear train is, whereby a clutch (21, 22) is arranged between the first gear (19) and the intermediate shaft (18) and between the second gear (20) and the intermediate shaft (18), with which the gears (19, 20) can be selectively separated or connected to the intermediate shaft (18), with an intermediate gear (15) freely rotatably mounted on the axis of the printing forme cylinder (7) being provided to connect the gear train to the second gear (20) of the intermediate shaft (18), the Gear train comprises a gear wheel connected to a rubber cylinder (6) arranged upstream of each printing forme cylinder (7), which is in engagement with the intermediate gear (15), the printing forme cylinder (7) being assigned a dampening unit (9) which is operated by means of a clutch (26 ) can be connected to the cylinder gear (16) of the printing forme cylinder (7) and can be driven by the individual drive (14), and a third gear (27) is arranged on the intermediate shaft (18) in alignment and spaced from the first and second gears (19, 20), via which the inking unit (8) can be driven.

Description

The invention relates to a device and a method for driving a rotary sheet printing press with at least one printing and/or coating unit, a cylinder carrying a printing form being coupled to a direct drive in each printing and/or coating unit.

Printing machines have a variety of devices that must be driven during printing operation, set-up operation or maintenance operation of the printing press. In classic constellations, all of the devices on a printing press that need to be driven are driven by what is known as the main drive of the printing press. All devices to be driven are then usually mechanically connected to the main drive via gears or toothed belts.

In other concepts for printing presses, at least some of the devices to be driven on a printing press are driven by their own motor. Drives are already known from the prior art in which the previously usual mechanical drive coupling of the plate cylinders and/or blanket cylinders with the central drive wheel train is permanently canceled and these rotating bodies are each driven separately ( DE 196 23 224 A1 , DE 199 03 869 A1 ).

A printing press whose printing units have plate cylinders driven by their own motor is from the EP 0 834 398 B1 known. The rubber cylinders of the printing units, which are driven by the main drive, and the plate cylinders, which are driven by their own motor, can each be coupled or decoupled via a switchable clutch.

From the EP 0 812 683 A1 is a processing machine for sheet material known with a controllable direct drive for an individually drivable cylinder. A plate cylinder or a rubber cylinder can be operated directly, decoupled from a wheel train of a sheet-fed printing press, which is provided at least for the transport of the sheet material by means of sheet guide cylinders, by means of an individual drive. Thanks to the individual plate cylinders, which can be driven by motors independently of the other cylinders, in addition to printing correction options, other processes such as changing plates or cleaning cylinders are also implemented. The inking unit assigned to the plate cylinder has at least one roller, which can be driven with a motorized direct drive. Alternatively, certain inking rollers are coupled on the drive side to the wheel train via the main drive. The disadvantage of this solution is that the work processes, especially when washing the cylinders, have to be carried out individually or sequentially.

In DE 10 2004 039 588 A1 a device for controlling a processing machine for sheet material is described, in which the inking unit is temporarily separated from the main drive and wheel train of the sheet guide cylinder and coupled to the directly driven cylinder carrying the printing form by arranging a switchable clutch. On the drive side, the inking unit can be operated, particularly for the cleaning processes, via the directly driven cylinder that carries the printing form. After the cleaning processes have been completed, the drive connection of the inking unit to the directly driven cylinder carrying the printing form is separated and the inking unit is mechanically coupled back into the main drive and wheel train of the sheet guide cylinders. However, by using only one clutch, the options for carrying out various operating processes are limited.

A drive with high flexibility for the optional implementation of various operating processes is provided DE 10 2005 036 786 B3 suggested. For this purpose, a two-part clutch gear is arranged on the cylinder carrying the printing form. The clutch gear consists of two gears that are arranged in two wheel planes. Furthermore, this drive is designed with a non-positive clutch system, specifically a two-part, individually switchable double clutch. If the individual drive fails, the clutch system enables the cylinder carrying the printing form to be driven using the main drive. However, the switching system has a complicated structure. Since it is arranged on the shaft journal of the cylinder carrying the printing form, it must be designed with relatively large dimensions and with great precision.

From the DE 100 46 368 A1 a printing unit of a web printing machine is known.

From the DE 10 2006 030 597 A1 a drive for an offset printing machine is known, with auxiliary motors being used.

From the DE 10 2004 022 889 A1 a device for driving a dampening roller in rotary printing machines is known.

The invention is therefore based on the object of proposing a cost-effective drive solution while maintaining a high level of flexibility when carrying out operating processes.

According to the invention, the object is achieved by a device with the features of the 1st or 3rd claim and a method with the features of the independent method claim. Before Partial configurations result from the subclaims.

The solution according to the invention has the advantage that a printing machine with high flexibility can be provided. Operating processes can preferably be carried out simultaneously or at least out of phase.

The arrangement of an intermediate shaft creates the possibility of using small-sized and therefore both cost-saving and space-saving switching systems. This allows the coupling processes to be made more effective.

Two clutches are arranged on the intermediate shaft. The clutches are preferably designed to be pneumatically actuated. The possible design options are multi-plate clutches or toothed clutches. The clutches can be actuated by a control device depending on the selected operating mode.

When washing processes take place in parallel with washing speeds that can be adjusted as required, not only a short cleaning time can be achieved, but also a high cleaning quality.

If an individual drive of the cylinder carrying the printing form fails, the circuit system enables the previously individually driven cylinder to continue to be operated with the drive wheel train and main drive of the printing press through a mechanical connection.

Furthermore, in the same switching position in a printing unit of a multicolor printing press that is not involved in printing, the individual drive for the plate cylinder can be used to feed a braking torque into the wheel train. For this purpose, the individual drive is controlled in such a way that essentially uniform tensioning of the gear transmission driving the printing press is guaranteed. Load moment-dependent printing errors in printing units not involved in printing, caused by a lack of ink splitting and a lack of frictional forces, can be safely avoided with the invention and the print quality can be noticeably improved.

In this mode of operation of a printing unit, the inking unit and the dampening unit are switched off from the plate cylinder, i.e. the pressure contact between the rollers and the plate cylinder is eliminated. Advantageously, the inking unit can be decoupled from the gear train using an additional clutch and thus stopped.

• 1: Schematische Darstellung einer Bogendruckmaschine
• 2: Antriebsschema für ein Druckwerk einer Bogendruckmaschine mit Plattenzylindereinzelantrieb
• 3: Antriebsschema für ein Druckwerk mit abkoppelbarem Farbwerk

The invention will be explained below by way of example. The associated drawings show:

• 1 : Schematic representation of a sheet-fed printing machine
• 2 : Drive diagram for a printing unit of a sheet-fed printing press with an individual plate cylinder drive
• 3 : Drive scheme for a printing unit with a detachable inking unit

In 1 a sheet-fed printing machine with a sheet feeder 3, several printing units 1, a coating unit 2 and a delivery 4 is shown. Each printing unit 1 consists of a sheet guide cylinder 5 designed as a printing cylinder, a blanket cylinder 6 and a plate cylinder 7. The plate cylinder 7 is assigned an inking unit 8 and, if necessary, a dampening unit 9 in front of the inking unit 8 in the direction of rotation of the plate cylinder 7.

The coating unit 2 consists of a metering device 10, a coating application roller 11 and a coating form cylinder 12.

The sheet is transported by the sheet guide cylinders 5. The drive takes place via the central gear train of the main drive 13. Likewise, the blanket cylinder 6 and inking unit 8 are coupled to the central gear train of the main drive 13. The plate cylinders 7 and paint form cylinders 12 can be driven individually, decoupled from the central gear train, by an individual drive 14.

A cleaning device can be assigned to each rubber cylinder 6, each plate cylinder/printing forme cylinder 7 and each varnish forme cylinder 12. Each inking unit 8 has an inking unit washing device (not shown).

In 2 the drive diagram for a printing unit 1 of a rotary sheet printing machine is shown.

The sheet guide cylinder 5, which is designed as a printing cylinder, and the blanket cylinder 6 can be driven by means of a wheel train and main drive 13.

The plate cylinder 7 can be driven decoupled from the gear train and main drive 13 by an individual drive 14. Of the individual drive 14, only the drive motor is shown. The individual drive 14 has a rotor arranged releasably at the end on the plate cylinder 7 and a stator arranged concentrically thereto and releasably fixed on the side frame. Of the inking unit 8 assigned to the plate cylinder 7, at least one inking unit roller 17 can be driven by the gear train and main drive 13.

On the plate cylinder 7, an intermediate gear 15 is arranged freely rotatable in a first wheel plane and a cylinder gear 16 is fixedly arranged in a second wheel plane. The intermediate gear 15 is part of the continuous gear train that connects all centrally driven cylinders, rollers and drums across the printing unit and to which the input from the main drive 13 can be fed.

Between the plate cylinder 7 and the inking roller 17 of the inking unit 8, preferably a distribution cylinder, an intermediate shaft 18 is arranged, on which a first gear 19 and a second gear 20 are freely rotatable in such a way that the cylinder gear 16 on the plate cylinder 7 with the first gear 19 on the intermediate shaft 18 and the intermediate gear 15 on the plate cylinder 7 is in engagement with the second gear 20 on the intermediate shaft 18.

On the intermediate shaft 18, a first clutch 21 is fixedly arranged at a distance from the first gear 19 and a second clutch 22 is fixedly spaced from the second gear 20. The clutches 21 and 22 are designed as pneumatic toothed clutches in the exemplary embodiment.

A third gear 23 is firmly connected to the intermediate shaft 18. This third gear 23 is in engagement with a downstream gear for driving the inking unit 8. The cylinder gear 16 on the plate cylinder 7 is in engagement with a gear 24 on the drive shaft of the dampening roller 25. A clutch 26 - assigned to the gear 24 on the drive shaft of the dampening roller 25 - enables the individual drive 14 to be coupled or uncoupled from the dampening unit 9. In the exemplary embodiment, this clutch 26 is designed as a pneumatic multi-plate clutch.

In 3 the drive diagram for a printing unit 1 is shown with an inking unit 8 that can be driven via an inking unit roller 17, with which the inking unit roller 17 can optionally be decoupled from the intermediate shaft 18 and stopped. A third gear 27 is arranged freely rotatable on the intermediate shaft 18 at a distance from the first and second gear 19, 20. This third gear 27 is in engagement with a downstream gear for driving the inking roller 17. A clutch 28 is also assigned to the third gear 27 on the intermediate shaft 18.

How the device according to the invention works:

In a first switching position, the first clutch 21 of the intermediate shaft 18 is disengaged to the first gear 19 and the second clutch 22 is engaged to the second gear 20. Here, the input coming from the main drive 13 and gear train via the second gear 20 is fed to an inking roller 17 of the inking unit 8. The plate cylinder 7 is driven by an individual drive 14.

This switching position is preferably used for printing operations.

If printing is to be carried out together with a dampening unit 9, the clutch 26 is also engaged on the dampening roller 25.

As a result, the drive torque of the individual drive 14 is passed on to the dampening unit 9. If, for example, printing is carried out using the dry offset process, the clutch 26 remains uncoupled.

In the event of a printing interruption, a printing plate change can preferably be carried out in this switching position.

In a second switching position, the second clutch 22 of the intermediate shaft 18 is disengaged to the second gear 20 and the first clutch 21 is engaged to the first gear 19. Here, the input coming from the individual drive 14 via the first gear 19 is fed to a roller of the inking unit 8.

This switching position is preferably used for the cleaning process.

In this switching position, the inking unit 8 can be washed parallel to the blanket cylinder 6 and/or to the sheet guide cylinder 5 designed as a printing cylinder.

The rollers of the inking unit 8 to be cleaned are driven synchronously with the plate cylinder 7 and, if necessary, the dampening roller 25 at a first peripheral speed and the cylinders driven by a gear train (rubber cylinder 6, printing cylinder 5) are driven for cleaning at a second peripheral speed. After the washing process has been completed, the temporary coupling of the directly driven plate cylinder 7 with a roller of the inking unit 8 is separated and the first switching position for printing operation is realized again.

This switch position can also be used to allow paint to run in.

In a third switching position, both the first clutch 21 and the second clutch 22 of the intermediate shaft 18 are disengaged from the first gear 19 and the gear 20. The first Gear 19 and the second gear 20 of the intermediate shaft 18, to which a drive from the main drive 13 or the individual drive 14 is fed, rotate freely and do not transmit the drive any further.

Variant: Clutch 26 is engaged.

In this switching position, the inking unit 8 is stopped and the dampening unit 9 is driven. This switching position is preferably selected for pre-moistening the printing material in the first printing unit 1 in the transport direction. The printing units 1 following the first printing unit 1 are set to printing operation.

Variant: Clutch 26 is disengaged.

In this switching position, the inking unit 8 and the dampening unit 9 are stopped.

The individual drive 14 drives the plate cylinder 7.

In a fourth switching position, both the first clutch 21 and the second clutch 22 of the intermediate shaft 18 are engaged to the first gear 19 and the second gear 20.

In this switching position, the plate cylinder 7, the inking unit 8 and, if necessary, the dampening roller 25 of the dampening unit 9 can be driven by the main drive 13 via the gear train.

This switching position can be used for printing operation, for example, if the individual drive 14 fails.

The motor of the directly driven plate cylinder 7 is de-energized and rotates freely.

This switching position is also suitable for feeding a braking torque into the wheel train when the printing unit 1 is not involved in printing.

In this mode of operation, the inking unit 8 is deselected and switched off from the plate cylinder 7, so that no printing ink is transferred to the plate cylinder 7. The inking unit 8 continues to be driven. In order to avoid damage to the rollers of the inking unit 8, printing oil or roller paste must be added. If the printing unit 1 is to be integrated into the printing operation again for a subsequent print job, the printing oil or roller paste must be removed in a laborious process.

A drive scheme according to is therefore advantageous 3 . The fourth switching position of the two clutches 21, 22 can now be combined with a disengaged third clutch 28. In this switching position, the inking unit 8 is stopped. With the individual drive 14, a braking torque is fed into the wheel train.

List of reference numbers used

1

Printing unit

2

Lacquerwork

3

Sheet feeder

4

Display

5

Sheet guide cylinder

6

Rubber cylinder

7

printing forme cylinder, plate cylinder

8th

Inking

9

Dampening system

10

Dosing device

11

Paint application roller

12

Paint form cylinder

13

Main drive

14

Single drive

15

intermediate gear

16

Cylinder gear

17

Inking roller

18

Intermediate shaft

19

gear

20

gear

21

clutch

22

clutch

23

gear

24

gear

25

Dampening roller

26

clutch

27

gear

28

clutch

Claims (16)

Device for driving a rotary sheet printing machine with at least one printing unit (1), each printing unit (1) having a printing forme cylinder (7) coupled to an individual drive (14), which is connected by a sheet guide cylinder (5) to which a main drive (13) is connected. acts, mechanically decoupled and in a predeterminable manner compared to the sheet guide cylinders (5) can be driven by its own motor, the printing forme cylinder (7) being assigned an inking unit (8) which can be driven via the gear train from the main drive (13) via an intermediate shaft (18), and a cylinder gear (16) is fixedly arranged on the printing forme cylinder (7), whereby on the intermediate shaft (18) has a first gear (19), which meshes with the cylinder gear (16), and aligned with this, a second gear (20) connected to the gear train is arranged, between the first gear (19) and the intermediate shaft (18) and a clutch (21, 22) is arranged between the second gear (20) and the intermediate shaft (18), with which the gears (19, 20) can either be separated or connected to the intermediate shaft (18), whereby To connect the gear train to the second gear (20) of the intermediate shaft (18), an intermediate gear (15) is provided which is freely rotatable on the axis of the printing forme cylinder (7), the gear train having a rubber cylinder (6) arranged upstream of each printing forme cylinder (7). ) includes a connected gear, which is in engagement with the intermediate gear (15), the printing forme cylinder (7) being assigned a dampening unit (9) which can be connected to the cylinder gear (16) of the printing forme cylinder (7) by means of a clutch (26). and can be driven by the individual drive (14) and a third gear (27) is arranged on the intermediate shaft (18) in alignment with the first and second gears (19, 20), via which the inking unit (8) can be driven. Device according to Claim 1 , characterized in that a third clutch (28) is arranged between the third gear (27) and the intermediate shaft (18), with which the third gear (27) can be selectively connected or separated from the intermediate shaft (18). Device for driving a rotary sheet printing machine with at least one coating unit (2), wherein each coating unit (2) has a coating forme cylinder (12) coupled to an individual drive (14), which is mechanically decoupled from a sheet guide cylinder (5) and on which a main drive (13) acts, and in a predeterminable manner relative to the sheet guide cylinders (5 ) can be driven by its own motor, wherein the paint forme cylinder (12) is assigned a paint unit (2) which can be driven by the main drive (13) via an intermediate shaft (18), and A cylinder gear (16) is fixedly arranged on the paint forme cylinder (12), a first gear (19), which meshes with the cylinder gear (16), and aligned with this, a second gear (20) connected to the gear train is arranged on the intermediate shaft (18), wherein a clutch (21, 22) is arranged between the first gear (19) and the intermediate shaft (18) and between the second gear (20) and the intermediate shaft (18), with which the gears (19, 20) can optionally be connected the intermediate shaft (18) can be separated or connected, for connecting the gear train to the second gear (20) of the intermediate shaft (18), an intermediate gear (15) is provided which is freely rotatable on the axis of the paint forme cylinder (12) and wherein the gear train comprises a gear wheel connected to a sheet guide cylinder (5) adjacent to each paint form cylinder (12), which is in engagement with the intermediate gear wheel (15). Device according to Claim 1 , 2 and 3 , characterized in that the clutches (21, 22, 26, 27) are pneumatic clutches. Device according to Claim 1 , 2 and 3 , characterized in that the clutches (21, 22, 26, 27) are coupled to a control device. Device according to Claim 5 , characterized in that a first switching position can be set with the control device, in which the first clutch (21) of the intermediate shaft (18) is disengaged to the first gear (19) and the second clutch (22) is engaged to the second gear (20). Device according to Claim 5 , characterized in that a second switching position can be set with the control device, in which the second clutch (22) of the intermediate shaft (18) is disengaged to the second gear (20) and the first clutch (21) is engaged to the first gear (19). Device according to Claim 5 , characterized in that a third switching position can be set with the control device, in which both the first clutch (21) and the second clutch (22) of the intermediate shaft (18) are disengaged to the first gear (19) and to the second gear (20). are. Device according to Claim 5 , characterized in that a fourth switching position can be set with the control device, in which both the first clutch (21) and the second clutch (22) of the intermediate shaft (18) are coupled to the first gear (19) and second gear (20). Device according to Claim 9 , characterized in that the fourth switching position and the third switching clutch (28) can be controlled with the control device, in which both the first switching clutch (21) and the second switching clutch (22) of the intermediate shaft (18) to the first gear (19) and second gear (20) are engaged and the third clutch (28) of the intermediate shaft (18) is disengaged to the third gear (27). Device according to Claim 1 , characterized in that the intermediate shaft (18) is arranged between a plate cylinder (7) and an inking roller (17), preferably a distribution cylinder, of the inking unit (8). Method for driving a rotary sheet printing machine with at least one printing unit (1) and/or coating unit (2), wherein each printing/varnishing unit (1, 2) has a printing forme/varnish forme cylinder (7, 12) coupled to an individual drive (14), which is connected mechanically by a sheet guide cylinder (5), on which a main drive (13) acts decoupled and can be driven by its own motor in a predeterminable manner compared to the sheet guide cylinders (5), wherein the printing form/varnish forme cylinder (7, 12) has an inking unit (8) that can be driven via the gear train from the main drive (13) via an intermediate shaft (18) or a coating unit that can be driven by the gear train from the main drive (13) via an intermediate shaft (18). 2) is assigned, and A cylindrical gear (16) is fixedly arranged on the printing form/paint form cylinder (7, 12), with a first gear (19) on the intermediate shaft (18), which meshes with the cylindrical gear (16), and a second one aligned with it a gear (20) connected to the gear train is arranged, wherein a clutch (21, 22) is arranged between the first gear (19) and the intermediate shaft (18) and between the second gear (20) and the intermediate shaft (18), with which the gears (19, 20) can optionally be connected the intermediate shaft (18) can be separated or connected, wherein the clutches (21, 22) are coupled to a control device and - a first switching position can be set with the control device, in which the first clutch (21) of the intermediate shaft (18) is disengaged to the first gear (19) and the second clutch (22) is engaged to the second gear (20) and - a second switching position can be set with the control device, in which the second clutch (22) of the intermediate shaft (18) is disengaged to the second gear (20) and the first clutch (21) is engaged to the first gear (19) and - A third switching position can be set with the control device, in which both the first clutch (21) and the second clutch (22) of the intermediate shaft (18) are disengaged from the first gear (19) and the second gear (20) and - A fourth switching position can be set with the control device, in which both the first clutch (21) and the second clutch (22) of the intermediate shaft (18) are engaged to the first gear (19) and second gear (20). Procedure according to Claim 12 , characterized in that the first switching position is used for printing operation and/or that a printing plate change can be implemented in the event of a printing interruption in this switching position. Procedure according to Claim 12 , characterized in that the second switching position is used for a cleaning process and/or for letting in paint. Procedure according to Claim 12 , characterized in that the third switching position for pre-moistening the printing material is selected in the first printing unit (1) in the transport direction or in this switching position the individual drive (14) drives the plate cylinder (7). Procedure according to Claim 12 , characterized in that the fourth switching position is used for printing operation if the individual drive (14) fails and/or to feed a braking torque into the gear train in a printing unit (1) that is not involved in printing.

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