DD201422A1 - ARCH HOOK SYSTEM - Google Patents

Abstract

The invention relates to a sheet gripper system in sheet-fed rotary printing machines with individually sprung, arranged on a gripper shaft, driven by a one-sided, consisting of roller lever and roller track curve control and can be closed by a spring sheet gripper. Based on the task to ensure a reduction in the vibration effect of the system gripper, gripper shaft at the point of Greiferoeffnung while increasing the Laufleistungsvermoegens the sheet gripper system, the cam control is associated with one end of the gripper shaft and the spring to the other end of the gripper shaft.

Description

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YEB Combine Polygraph

 "Werner Lamberz" Leipzig

7050 Leipzig Leipzig, the 18.09.1981

Sheet gripper system

field of use

The invention relates to a sheet gripper system in sheet-fed rotary printing presses.

Characteristic of the known technical solutions

It is a sheet gripper system known, the sheet gripper are individually sprung on a gripper shaft and perform by a non-positive cam control and a spring an opening and closing movement. (DE 1005981 15 e 9/11) is disadvantageous in that the gripper shaft is free to move within the bearing clearance of the individual sheet gripper bearings and is biased only on one side introduced bending moment. ^;

The well-known sheet gripper system with the on the gripper shaft

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individually spring-mounted grippers secures the sheet hold by over-pressing the gripper springs after the gripper tongues have placed on the gripper clutches with the intermediate sheet. When opening the sheet gripper, the roller is held by the spring on the roller track, thereby a critical Bewegungsbereieh occurs. In this case, the suppression of the gripper spring reaches the value Hull. From this point on, the gripper tongue forces become zero and the sheet grippers open. After opening the gripper, the deforming effect of the gripper holding forces on the gripper shaft is suddenly no longer present.

Depending on the speed with which the sheet gripper system is opened, creates a more or less large impulse on the bow gripper system, which vibrates the elastic massed system gripper / gripper shaft and thereby oscillates against the roller lever and the spring. Are the forces occurring in the system gripper / gripper shaft with the spring force straight in equilibrium, the limit mileage of the sheet gripper system is reached, as a higher running speed for periods see lifting and restarting the role leads to the roller track.

Object of the invention

The aim of the invention is to avoid the free mobility of the mass system sheet gripper system by an economic use of the funds.

Object of the invention

The object of the invention is to provide a sheet gripper system which reduces the vibration effects of the system gripper / gripper shaft at the point of gripper opening bej while increasing the running performance of the sheet gripper.

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gripper system guaranteed.

Essence of the invention

According to the invention the object is achieved "that the cam control is assigned to one end of the gripper shaft and the spring to another end of the 'gripper shaft.

embodiment

The invention will be explained in more detail below using an exemplary embodiment.

The accompanying drawings show in

Pig. 1: a section through a sheet gripper system FIG. 2: a schematic representation of the forces applied to the gripper shaft bearings.

Figure 1 shows a sheet gripper system, wherein in a cylinder 1 a bow gripper 2 carrying gripper shaft 3 is rotatably mounted .. The individually resiliently rotatably mounted on the gripper shaft 3-sheet gripper 2 cooperate with the firmly fixed in the cylinder 1 gripper cuffs 4 together. About a arranged at one end 3.1 of the gripper shaft 3 from roller 5, roller lever 6 and roller track 7 existing curve control of the sheet gripper 2 is controllable.

At the other end 3 * 2 of the gripper shaft 3 and a rotatable on the cylinder outer side 9 bearing 10 is parallel to a lever 8, a spring 11 is mounted.

In Figure 2, the attacking on the gripper shaft 3 forces

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shown schematically. The gripper shaft 3 is mounted in a first gripper shaft bearing 12 and in a second gripper shaft bearing 13. At the one end 3.1 of the gripper shaft 3, the roller 5 is arranged above the roller lifting device 6, and at the other end 3.2 of the gripper shaft 3, the spring 11 is associated with the gripper shaft 3. The sheet gripper 2 are mounted individually resiliently rotatable on the gripper shaft 3.

In the first gripper shaft bearing 12 is the force F .., which corresponds in size and direction of the force acting in the second gripper shaft bearing 13 bearing force F-.

The operation of the sheet gripper system is as follows:

According to the rotation of the roller track, the movement on the roller 5, the roller lever 6 and the gripper shaft 3 is transmitted to the sheet gripper 2, so that consisting of sheet gripper 2 and gripper 4 impact.e gripper system is open or closed. By the spring 11 while a constant investment of the roller 5 is ensured on the roller track 7.

The advantages of the solution according to the invention are that by the arrangement of the cam control 5,6,7 on one side

3.1 of the gripper shaft 3 and the spring 11 on the other side

3.2 of the gripper shaft 3 at the moment of gripper opening in the gripper shaft bearings 12, 13 equal and rectified forces

F ₁ and F ρ act, thereby a reduction of the vibration effects by the same bearing forces and an increase of the running power is achieved, with an economical use of the means ..

Claims (1)

^ - W -T \ J i L ·. yj invention claim Sheet gripper system for sheet-fed rotary printing machines with individually sprung arranged on a gripper shaft, arranged by a one-sided consisting of Rollenhebei and roller track curve control drivable and closed by a spring bow gripper, characterized in that the cam control C 5, 6, 7, one end (3.1) of the gripper shaft , (3) and the spring (11) are assigned to another end (3.2) of the gripper shaft (3). For this 1 page drawings