DE4214228A1 - Drive system for printing cylinder - Incorporates hydraulic release system to allow phase adjustment of cylinder - Google Patents

Abstract

The drive system is for a printing cylinder (3) in a multiple cylinder printing machine. It allows the cylinder to be driven without slippage in a given phase relationship with the other cylinders, but the phase angle may be altered when desired. The cylinder (3) is driven via a gearwheel (4) which is rigidly coupled to the shaft stub (2) at the end of the roller. There is a gear crown (6) firmly seated on a collar (5) on the gearwheel and capable of being lifted to allow free rotation by hydraulic pressure. The hydraulic fluid is supplied via a pipe (10) to a fixed cylindrical body (9) inside a bearing member (8). The fluid flows through a first line (17) to the collar and through a second line (16) to an expanding brake ring inside a fixed drum. USE/ADVANTAGE - Easy adjustment of phase of printing cylinder.

Description

The invention relates to a locking device for Zylin der und Druckwerke in Druckmaschinen, which are optionally available in Face printing or face and back printing can be used and where when changing the operating mode from straight printing to beautiful and reverse pressure and vice versa and when processing one the other sheet length in face and reverse printing the relative Angular position of two adjacent cylinders to each other adjusted must become.

The change in the relative angular position of neighboring Zy Linder takes place on known printing presses in that a common axis two gears are arranged and due to a releasable connection with each other are engaged. After releasing the positive Ver bond can the phase relationship of the gears to each other and so that the angular position of neighboring cylinders is changed the.

When turning the cylinders relative to each other, it is necessary derlich that a cylinder is detected during the other cylinder is rotated.

The invention to be described below is based on the Locking device.

It is known (DD-PS 1 35 812, for changing the phase position between two drive wheel trains on one axis Cylinder to arrange two gears, one gear is rotatably connected to the axis and to a first Drive gear train is in mesh and a second Gear is rotatably mounted on the axis and with a second gear train is in mesh and over  a clamping ring and several spring-loaded bolts with the first gear is non-positively connected.

To enable the phase change, d. that is, the Ver rotation of the gears against each other, the frictional connection between the two gears by means of the first gear arranged and acting on the second gear bolt zen canceled. The central drive of the bolts follows via gear stages from beyond the system arranged adjustment levers.

There is no indication in this document as to which measures one printing unit over the other Printing unit is detected when changing the phase position.

From DD-PS 2 49 887 is a clutch for gear and Sprocket known that works with hydraulic means. A gear wheel is firmly connected to the cylinder. The gear has an outer collar with a cylindrical or conical mating surface. There is one in the mating surface oil distribution extending centrally around the entire circumference groove integrated. Opens into the oil distribution groove an oil supply hole penetrating the collar. The Oil supply hole and the oil distribution groove are hydraulic can be acted upon.

A ring gear is shrunk onto the collar of the gear wheel. After hydraulic loading of the oil distribution groove the shrink connection between the ring gear and gear GE triggers so that after a printing unit is fixed with means of one drive the other printing unit to the fixed Printing unit can be rotated.

It is not clear from this publication with which Means in this advantageous solution after the cancellation the connection between gear and ring gear is one thing Printing unit is fixed.

The invention has for its object a finding direction for cylinder and printing units on machines of the to create the type mentioned, at which one for solving Hydraulic system available for gears for the festival is used by cylinders.

According to the invention the task is characterized by Features of the first claim solved.

The solution according to the invention has the advantage that Loosen the gear connection and lock the cylinder which is done by joint hydraulic loading.

This reduces the number of components required. The braking process is parallel to the loosening of the ring gear executed without additional controls, safety tion switch, pressure switch, hydraulic motors u. a. Components are needed.

Using an exemplary embodiment, the following is intended Invention will be described in more detail.

The only drawing shows a leg 2 of a cylinder 3 mounted in the side wall 1 of the printing press. At the front of the leg 2 , a gear 4 is fixed. The gear 4 has a collar 5 pointing outwards. A ring gear 6 is pressed onto the collar 5 .

The gear 4 is also assigned a rotary transformer 7 , which has the following structure:

A bearing housing 8 is arranged fixedly on the toothed wheel 4 and accommodates a cylinder body 9 . The Zylinderkör by 9 has a bore 13 which is part of a hydraulic line 10 .

Outside of the bearing housing 8 , an expansion sleeve 11 is provided, which includes a pressure chamber 12 which is open to the bearing housing 8 .

The bearing housing 8 is received by a brake drum 14 which is fixedly connected to the side wall 1 via a bearing arm 15 .

The hydraulic line 10 , which starts from a hydraulic pump (not shown), opens into the bore 13 and goes from this into the brake line 16 , which opens into the pressure chamber 12 and into the release line 17 , which leads to the collar 5 and thus to the ring gear 6 .

The rotary transmitter 7 thus consists of the rotatably movable bearing housing 9 with the expansion sleeve 11 and the rotationally fixed cylinder body 9 .

It goes without saying that gear 4 and ring gear 6 mesh with gears of adjacent cylinders.

The mode of action of the solution according to the invention is fol gend:

When changing the operating mode and processing sheets of other lengths in face and back printing, it is necessary to loosen the connection between gear 4 and ring gear 6 and to determine the cylinder 3 in rotation.

The connection of gear 4 / ring gear 6 is released according to the solution according to DD-PS 2 49 887.

Starting from the hydraulic motor via the hydraulic line 10, the bore 13 and the release line 17 by means of liquid speed between ring gear 6 and collar 5 generates an overpressure which cancels the connection between gear 4 / ring gear 6 , so that the ring gear 6 rotates to the gear 4 in the circumferential direction can be.

At the same time, the pressure chamber 12 is acted upon hydraulically via the brake line 16 . This sets the expansion sleeve 11 against the brake drum 14 , so that the Lagerge housing 8 and thus the cylinder 3 is braked.

The pressure between the expansion sleeve 11 and the brake drum 14 is only so strong that, although the determination of the cylinder 3 is effected, the pair of expansion sleeve 11 / brake drum 14 acts as a slip clutch when torque is applied to the cylinder 3 (driving against a stop). Now, while maintaining the pressure of the ring gear 6 with the adjacent, not shown, cylinder can be rotated relative to the gear 4 .

After the phase change has ended, the pressure is switched off. So that a firm connection between gear 4 and ring gear 6 is established again. At the same time, the rotary transmitter 7 and thus the cylinder 3 are braked.

The solution according to the invention can also be used when the gear 4 and ring gear 6 are released hydraulically in a different way.

List of reference symbols

1 side wall
2 legs
3 cylinders
4 gear
5 fret
6 ring gear
7 rotary transmitters
8 bearing housings
9 cylinder body
10 hydraulic line
11 expansion sleeve
12 pressure chamber
13 hole
14 brake drum
15 bearing arm
16 brake line
17 loosening pipe

Claims (8)

1. Locking device for cylinders and printing units in printing presses, which can be used either in straight printing or face and back printing, with means for changing the relative angular position of adjacent cylinders, with one cylinder being provided with a double gearwheel that is guided by a pressure oil assembly leading into the cylinder ge can be solved and in which when the rela tive angular position of the cylinder carrying the double gear can be determined rotatively, characterized in that a rotary transmitter ( 7 ) of the cylinder ( 3 ) relative to the side wall ( 1 ) is hydraulically rotatably fixed. 2. Locking device according to claim 1, characterized in that the rotary transformer ( 7 ) consists of a bearing housing ( 8 ), an expansion sleeve ( 11 ) and a cylinder body ( 9 ). 3. Locking device according to claim 1 and 2, characterized in that the expansion sleeve ( 11 ) is assigned to the bearing housing ( 8 ). 4. Locking device according to claim 1 to 3, characterized in that the expansion sleeve ( 11 ) is provided with a pressure chamber ( 12 ). 5. Locking device according to claim 1 and 4, characterized in that the brake line ( 16 ) opens into the pressure chamber ( 12 ). 6. Locking device according to claim 1 and 5, characterized in that the brake line ( 16 ) via the bore ( 13 ) of the cylinder body ( 9 ) with the hydraulic line ( 10 ) is connected. 7. Locking device according to claim 1, 2 u. 4, characterized in that the bearing housing ( 8 ) via the expansion sleeve ( 11 ) is connected to a brake drum ( 14 ). 8. Locking device according to claim 2, characterized in that the bearing housing ( 8 ) via the gear ( 4 ) is fixedly connected to the cylinder ( 3 ).