DD289975A5 - APPLICATION ROLLER DRIVE FOR PRINTING MACHINES - Google Patents

Abstract

The invention relates to a mandrel roller drive for printing machines. The task of creating a mandrel drive for printing presses, which contributes to the realization of different speeds of the applicator roll with simple means and is switchable during the machine run, is achieved by dasz on the provided with a central bore and four mutually offset by 90 degrees grooves bearing leg is arranged , The drawing wedge is formschlüssess with a sliding sleeve and this connected via a pivot lever with an actuator. The gear 5 except the grooves has a collar, the Masze lie in relation to the inner diameter and width over the masculinity of the drawing wedge. Fig. 1 {Printing Machine; Roller; Differential speed; Draw key}

Description

For this 1 page drawings

Field of application of the invention

The invention relates to a mandrel roller drive for printing presses.

Characteristic of the known state of the art

In the known application roller drives dio dampening roller is driven either by positive engagement or by friction from the plate cylinder.

The positive drive ratios are chosen in recent years so that in the engaged state, the surface speed of the applicator roll is slightly slower than that of the pressure plate, which has a constant wiping effect {Delta effect) on the plate result, thereby cleaning the pressure plate be removed.

The consequence of the constant use of this delta effect is early pressure plate wear.

On the basis of this knowledge, a large number of lings have emerged for the temporary use of this delia effect, for example

DE-OS 3416845; DD-PS 2380 ^ 4.

All these solutions have the common disadvantage that they are very complicated and complicated to produce and require a lot of space.

Object of the invention

OBJECT OF THE INVENTION Is an applicator roller drive for printing presses, which contributes to improving the print quality with low production costs.

Explanation of the essence of the invention

The invention has for its object to provide a mandrel drive for printing machines, which contributes to the realization of different speeds of the applicator roll with simple means and is switchable during the machine running. According to the invention the object is achieved in that on the provided with a central bore and four mutually offset by 90 degrees bearing legs of the applicator roller, two likewise provided with grooves gears are arranged, which are in meshing with a double-wide plate cylinder gear and a star-shaped pull wedge can be connected to the applicator roll.

The draw key is positively connected to a sliding sleeve and this connected via a pivot lever with an actuator. The gear 5 except the grooves 10 has a collar whose dimensions are in relation to the inner diameter and width of the dimensions of the drawing wedge.

embodiment

The invention will be explained in more detail with reference to an embodiment. The accompanying drawings show

Fig. 1: schematic representation of the applicator roller drive partially in section Fig. 2: sectional view taken along the line A-A.

Fig. 1 shows the stored in the machine frame 1 plate cylinder 2 on the legs of a double-wide Plattenzylinderrad is attached. This is in meshing engagement with the rotatable but axially fixed, mounted gears 4 and 5, which are located on the bearing leg β of the applicator roller 7. The gears 4 and 6 are with different numbers of teeth within the possible tooth correction, d. H. a slightly larger or smaller number of teeth of the gear 5 with respect to the synchronism between the rollers 2 and 7 generating gear 6 equipped. The bearing leg 6 of the applicator roll 7 is formed so that radially to a central bore 8 four milled by 90 degrees to each other grooves 9 are milled. According to Flg. 2 are in these grooves 9, a star-shaped susgebildeten draw key 11 is used, which protrudes similar to a feather key over the outer diameter of the bearing leg 6 and engages with these ends as a driver optionally in four cleared grooves 10 of the gears 4 or 5.

The gear 5 has, for the purpose of interrupting the form-locking drive between plate cylinder 2 and applicator roller 7, a collar 12 over the width of the grooves 10 are missing.

On the drawing wedge 11 a Schaltmuffo 13 is positively secured, which is connected via a mounted in the machine frame 1 pivot lever 14 with a preferably pneumatically or electrically actuated Stelhlement 15. The mode of action is the following:

Starting from the plate cylinder 2, the gears 4 or 6 are driven via the plate cylinder gear 3. Depending on the switching position of Stelielementos 15 three drive states of the applicator roller 7 can be realized.

Position I:

The drive of the Auftragwclze 7 via the gear 4, whereby a positive drive of the applicator roller 7 synchronously

is reached to the plate cylinder 7.

Position II:

The pull key 11 is located within the wound collar 12 of the gear 5, whereby no torque transmission takes place. The gears 4,5 turn on the bearing bracket! 6 through. The drive of the applicator roller 7 is effected by friction of the plate cylinder. 2

Position III: The pull key 11 is located in the grooves 10 of the gear 5, whereby the power flow takes place via this gear. By the Difference number of teeth within the possible tooth correction also results in a differential speed of the applicator roller. 7

opposite the platter cylinder 2.

The grooves 10 of the gears 4.5 and the pull key 11 are provided with phases, so that the circuit of the pull-wedge 11 during

the machine run can be made.

Claims (3)

1. applicator roller drive for printing machines, wherein the interposition of a clutch drive from the plate cylinder, characterized in that on the with a central bore (8) and four mutually offset by 90 degrees grooves (9) bearing leg (6) of the applicator roller 7, two likewise provided with grooves (10) gears (4,5) are arranged, which are in meshing engagement with a double-wide plate cylinder gear (3) and via a star-shaped drawing wedge (11) with the applicator roller (7) are vorbindbar. 2. applicator roller drive according to claim I, characterized in that the pulling wedge (11) is positively connected to a sliding sleeve (13) and this via a pivot lever (14) with an actuating element (15). 3. applicator roller drive according to claim 1, gekonnzeichnet characterized in that the gear 5 except the grooves (1P) has a collar (12) whose dimensions are in relation to the inner diameter and width beyond the dimensions of the draw key (11).