JPH0259057B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for changing the phase position of a drive gear mechanism of a printing press.

A gear wheel connected to the first drive gear mechanism is mounted on the shaft of the cylinder at an operating point for changing the phase position between the two drive gear mechanisms, and a clamp ring and a plurality of resiliently supported bolts are mounted on the shaft of the cylinder. It is known to arrange a gearwheel on said gearwheel, which is connected via a second drive gear mechanism (see German Democratic Republic Patent No. 135 812). In order to be able to change the phase position, i.e. to be able to turn the gears in opposition to each other, the gears are arranged in the first gear and act on the second gear. The rigid connection between both gears is broken using a threaded bolt that is shaped like this. The central drive of the threaded bolt is carried out using an adjusting lever which is mounted on the outside of the system via a gear stage.
However, conventional devices use threaded bolts, which have the disadvantage of increasing adjustment length and adjustment time. Furthermore, it has been pointed out that in the case of conventional devices, it is not possible to control the connection action from a strong point of view, and that the phase position may change unexpectedly.

The present invention allows for comfortable operation when changing phase positions in a drive gear mechanism of a printing press.

Therefore, an object of the present invention is to provide a device for changing a phase position that is configured to be able to change the phase position in a short time and to prevent the phase position from changing unexpectedly. It is to provide.

The above object has been achieved according to the invention by mounting a rotationally fixed distance adjustment element and a rotatable distance adjustment element with a rotating wedge surface on a resiliently supported bolt. . The rotating wedge surface is thus configured to perform an automatic control function. A center gear cooperating with an adjusting gear and a gear wheel connected with a rotatable distance adjusting element is rotatably mounted on the shaft carrying this center gear.
According to a variant of the invention, the gear is carried by a center gear which carries a connecting rod which cooperates with the control gear and which is connected via a control lever to a rotatable distance adjustment element. Rotatably mounted on the shaft.

The invention will now be described in detail with reference to the accompanying drawings, which illustrate embodiments of the invention.

FIG. 1 illustrates the configuration of a device for changing phase positions according to the present invention. A cylinder 2 arranged in an operating position in which a first gear 3 connected to a part of a drive gear mechanism (not shown) changes the phase position.
It is fixed on the shaft 1 of. A second gear 4 connected to another part of the drive gear mechanism is connected to the first
It is rotatably supported on a gear 3. It is closed by a cover disc 5 and bolts 6, and the two gear wheels 3 and 4 are fixedly connected by means of a plurality of bolts 8 with springs 7 and a clamping ring 9.

Furthermore, two distance adjustment elements 10 and 11 are mounted on each bolt 8. Of these two distance adjustment elements, the first distance adjustment element 10 is in a rotationally fixed state and its rotational movement is prevented by the fixing pin 12, while the second distance adjustment element 1
1 is rotatably attached to a bolt 8.

The distance adjustment elements 10, 11 are provided with cooperating rotating wedge surfaces.

Automatic control works on this rotating wedge surface, so
No safety elements are required to prevent unexpected rotational movements. Since the slope of the rotating wedge surface is set according to the strength of the spring 7,
To break the strong connection between gears 3 and 4, the second
It is only necessary to rotate the distance adjustment element 11 to a minimum extent.

According to a second variant of the drive mechanism of the second distance adjustment element 11, the second distance adjustment element
The gear 13 meshes with a center gear 14 rotatably supported on the shaft 1 (see FIG. 2). This center gear 14 can be rotationally driven by operating the adjustment gear 17. According to a second variant of driving the second distance adjustment element 11 (see FIG. 3), the second distance adjustment element 1
1 is connected to an adjusting lever 15, which is connected to the center gear 14 via a connecting rod 16. In this variant, it is preferred that the adjusting lever 15, the connecting rod 16 and the center gear 14 form a bell-crank type joint.

The operation of the apparatus according to the present invention will be explained as follows.

If it is necessary to change the phase position of the drive gear, the rigid connection between both gears 3 and 4 is released. Thereafter, by operating the adjustment gear 17 and the center gear 14, the second distance adjustment element 11 having the gear 13 is rotated. Due to the action of the rotating wedge surface, the distance changes and the spring 7 is accordingly relaxed, so that the rigid connection between the gears 3 and 4 is released. It is thus possible to change the phase position. That is, gears 3 and 4
can be rotated relative to each other. After changing the phase position, the second distance adjustment element 11
Turn it back again. The resulting change in distance reduces the space occupied by the spring 7, so that the spring 7 can be attached to both gears 3 via the clamp ring 9.
and 4 so that a solid connection is again formed between both gears 3 and 4.

In a second variant of the drive mechanism shown in FIG. The connected adjustment lever 15 can be turned, thereby reducing or increasing the space occupied by the spring 7.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional side view of a device for changing phase positions according to the present invention, showing the configuration of an embodiment of a drive mechanism using gears, and FIG. FIG. 3 is a partial side view of the device for changing the phase position, showing the construction of an embodiment of the mechanism using an adjustment lever. 1...Cylinder/shaft, 2...Cylinder, 3...First gear, 4...Second gear, 5
...Cover disk, 6...Bolt, 7...Spring, 8...Bolt, 9...Clamp ring, 1
0, 11...Distance adjustment element, 12...Fixing pin,
13...gear, 14...center gear, 15...
...adjustment lever, 16...connecting rod,
17...Adjustment gear.

Claims (1)

[Claims] 1. A first gear 3 is fixed to the shaft 1 of the cylinder 2, a second gear 4 is rotatably supported by the first gear 3, and is clamped to the first gear 3. In a tightening and releasing device for two gears 3, 4 that are frictionally engaged via a ring 9 and a plurality of bolts 8 biased by a spring 7, the clamp ring 9 is attached to the bolt 8 biased by a spring 7. A non-rotatable distance adjustment element 10 and a rotatable distance adjustment element 11 are disposed on the other hand, and each of these distance adjustment elements 10 and 11 has a rotating wedge surface facing the clamp ring 9, and Distance adjustment element 1
A tightening and releasing device for two gears, characterized in that a center gear 14 for rotationally driving the gears 1 and 1 is meshed with each other. 2. A center gear 14 meshing with the adjustment gear 17 and the gear 13 connected to the rotatable distance adjustment element 11 is rotatably mounted on the shaft 1 carrying the first and second gears 3, 4. 2. A device according to claim 1, characterized in that: 3 The center gear 14, which meshes with the adjustment gear 17 and supports the connecting joint 16 connected to the rotatable distance adjustment element 11 via the adjustment lever 15, is connected to the first and second gears 3, 4. Claim 1, characterized in that it is rotatably mounted on a shaft 1 carrying a
Apparatus described in section.