JP2618592B2 - Sheet gripper device used for sheet guide cylinder of rotary printing press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet gripper device for a web printing press, preferably a multicolor rotary printing press, for use on a sheet guide cylinder mounted on a side frame on an end face. A gripper is arranged on a controlled gripper shaft, and the gripper is assigned a gripper support arranged on a spring-loaded radially movable gripper stopper strip.

[0002]

2. Description of the Related Art Utility Model Registration No. 680 of the Federal Republic of Germany
A sheet gripper device with a radially adjustable gripper support is known from EP 0150. The gripper support consists of a shaped rod with an insert.

[0003] Published German Patent Application No. 3428
In a sheet gripper device with a radially adjustable gripper support known from U.S. Pat.
These gripper supports can be shifted centrally by the principle of a knee lever. In one configuration of this known device, the gripper support is pivotally mounted on a corresponding gripper shaft by a spring-loaded double lever.

Another solution for an adjustable gripper support is disclosed, for example, in DE-A-11 594.
These are known from U.S. Pat. No. 7,171,801, German Patent 1,235,595, and German Patent Application No. 3,714,284.

[0005] All solutions help to adjust the gripper support to the thickness of the paper / cardboard to be processed in order to avoid run-out phenomena or register inaccuracies.

[0006] German Patent No. 2030040 and the German Democratic Republic Patent 286136.
In a device with sheet grippers, known from U.S. Pat.
The movement is performed at right angles to the gripper stopper surface. Such a solution prevents the displacement of the gripper and the run-out phenomenon.

[0007] A disadvantage of all these known solutions is that with solutions which are expensive and have an adjustable gripper support, the slip phenomenon is not prevented.

[0008]

SUMMARY OF THE INVENTION The object of the present invention is to provide a sheet gripper device which eliminates the above-mentioned drawbacks, has a simple structure, and guarantees accurate sheet transfer without register phenomena. To provide.

[0009]

According to the present invention, a roller is disposed on each end face of the gripper stopper strip, and the roller is fixed to the side frame in the sheet transfer area. Since a rolling pair is formed together with the joint control cam, the gripper stopper strip is
Along the at least one linear guide arranged on the support surface of the sheet-guiding cylinder, the sheet can be moved up and down at right angles to the gripper stop surface in conjunction with the spring force of the spring during sheet transfer. I did it.

In another embodiment of the invention, a joint control cam is fixed to each end face of the gripper stopper strip, and the control cam is supported on the side frame in the sheet transfer area. The roller pair forms a rolling pair with the two rollers, so that the gripper stopper strips, during the sheet transfer, along at least one linear guide arranged on the support surface of the sheet guide cylinder, during the transfer of the sheet Combined with the force, the vertical movement can be made at right angles to the gripper stopper surface.

[0011]

The solution according to the invention is a sheet gripper system without slippage. By the rolling couple formed by the roller and the control cam, the vertical movement of the gripper stopper strip is performed at right angles to the gripper support surface, and the gripper stopper strip is synchronously introduced from both end faces of the gripper stopper strip. Sometimes, no relative movement occurs in the sheet running direction. This makes it possible to achieve a precise delivery of the register by means of a very simple sheet gripper device and to avoid run-out phenomena.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

The sheet gripper device is arranged in the groove 5 of the sheet guiding cylinder. This device consists of a single row of grippers 7
And a controllable gripper shaft 6 for supporting the gripper and a gripper stopper strip 1. This gripper stopper strip 1
Support a row of gripper supports 2, which are assigned to grippers 7, so that each gripper tip 8 is operatively connected to a gripper stopper surface 9.

The gripper stopper strip 1 is movably connected to two linear guides 4 which are mounted on the support surface 10 of the sheet guide cylinder at right angles to the gripper stopper surface 9. Are located. The body groove 5 supports the gripper stopper strip 1 in the area of the linear guide 4.
Two springs 3 are arranged.

On each end face of the gripper stopper strip 1, a roller 12 which can rotate is arranged. For example, when transferring a sheet from a front transfer cylinder to a sheet guide cylinder or an impression cylinder, each roller 12 contacts a control cam 11 fixed to a side frame. These control cams 11
Are arranged on each side frame and are formed integrally with each other. As a result, a rolling pair is formed by the roller 12 and the control cam 11, and the necessary vertical movement of the gripper stopper strip 1 can be synchronously introduced from both end surfaces. The contours of these control cams 11 are
In the sheet transfer area, that is to say, for example, where the sheet is transferred from the front transfer cylinder to the sheet guide cylinder, the gripper support enters the sheet guide cylinder. It is configured to perform a downward movement and then perform an upward movement. Gripper stopper strip 1
During the downward movement, the gripper 7 is also opened, and during the upward movement of the gripper stopper strip 1, the gripper 7 is closed or in the closing phase. As a result, the gripper 7 and the gripper stopper strip 1 clamp the sheet from above and below. The gripper support 2 can be adjusted on the gripper stop strip 1 according to the paper / cardboard thickness using known means. However, via the adjustable contour of the control cam 11, the paper / cardboard thickness may be taken into account.

The operation of the solution according to the invention takes place as follows.

In the sheet delivery area, the gripper shaft 6
Is opened by the control of the gripper shaft 6. At this time, the spring-loaded gripper stopper strip 1 moves radially in the sheet delivery area with the gripper support 2 in the sheet transfer area, that is, toward the cylinder axis, by the rolling pair, and moves radially into the cylinder. For a short time. Subsequently, a sheet (not shown) is supplied and the gripper shaft 6 closes the gripper 7. With the gripper tip 8 of the gripper 7 in the closed position, the rolling pair also causes the gripper stopper strip 1 to move upward again, i.e., radially outward, together with the spring force of the spring 3. Exercise. Such vertical movement of the gripper stopper strip 1 is performed at right angles to the gripper stopper surface 9. The sheet thus delivered is now clamped from above by the gripper tip 8 and from below by the gripper stopper surface 9 of the gripper stopper strip 1.

[Brief description of the drawings]

FIG. 1 is a partial schematic view of a sheet gripper device according to the present invention.

FIG. 2 is a front view taken along the line AA of FIG. 1;

[Explanation of symbols]

1 gripper stopper strip, 2 gripper support, 3
Spring, 4 Linear guide, 5 Body groove, 6 Gripper shaft, 7 Gripper, 8 Gripper tip, 9
Gripper stopper surface, 10 support surface, 11 control cam, 12 rollers, 13 side frame

Continuation of front page (56) References JP-A-61-144353 (JP, A) JP-A-61-41549 (JP, A) JP-A-61-2111044 (JP, A)

Claims (2)

(57) [Claims] 1. An end face side of a rotary printing press on a side frame.
Sheet gripper used for sheet guide cylinders supported by
An apparatus, wherein a gripper is disposed on a controlled gripper axis.
The gripper has a spring-loaded radial movement.
Gripper support arranged on a movable gripper stopper strip
Of the type in which a gripper is assigned , a roller (1) is attached to each end face of the gripper stopper strip (1).
2) is arranged, and the rollers are arranged in a sheet transfer area.
And one each fixed to the side frame (13)
Form a rolling couple with the joint control cam (11) of
So that the gripper stopper strip (1) is
At least one shaft disposed on the support surface (10) of the inner trunk;
When the sheet is delivered along the line guide (4), the spring
Combined with the spring force of (3), the gripper stopper surface (9)
Characterized by being able to move up and down at right angles to
Sheet gripper used for sheet guide cylinder of rotary printing press
apparatus. 2. An end face side of a side frame of a rotary printing press.
Sheet gripper used for sheet guide cylinders supported by
An apparatus, wherein a gripper is disposed on a controlled gripper axis.
The gripper has a spring-loaded radial movement.
Gripper support arranged on a movable gripper stopper strip
Of the type to which the gripper stopper strip (1) is attached,
(11) is fixed, and the control cam is
Each area supported on the side frame (13)
To form a rolling couple with one roller (12)
So that the gripper stopper strip (1) guides the sheet
At least one straight line located on the support surface (10) of the torso
When the sheet is delivered along the guide (4), the spring (3)
Combined with the spring force, the gripper stopper surface (9)
Characterized by being able to move up and down at right angles
A sheet gripper device for a sheet guide cylinder of a printing press.