JPS5821586B2 - Print clamping device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION FIGS. 1 to 5 show a fastening device in a conventional off-wheel printing unit. Insert the plate 3 into the butt 2 as shown in Fig. 4, and hook the bent part of the gripper 4 at the other end of the plate 1 to the protrusion 1 on the gripper side of the plate cylinder gap 6.
After winding the plate around the plate cylinder 5, push the gripper end 2 and the gripper 4 into the gap 6 as shown in FIG. While pressing as shown in the figure, tension is applied to the plate 1 by pressing the gripper 4 against the wall of the gap 6 with the plate clamping shaft 8.

Next, in the sufficiently tightened state, the plate 1 is further firmly clamped in the groove between the plate clamping shaft 8 and the plate cylinder 5, thereby preventing the plate 1 from being pulled out.

Further, an arm 10 and a tightening screw 11 are provided for this tightening, and a claw 12 is further provided to improve operability, that is, to prevent reverse rotation.
and a model car 13 are provided.

If the claw 12 and the mold wheel 13 are disengaged, the plate clamping shaft 8 can be rotated independently using a spanner or the like at the square part 14 at the end. By loosening or disengaging the pawl 12 and the mold wheel 13, and rotating the plate clamping shaft 8, the plate 1 is brought into a detached state and removed.

However, in the conventional apparatus described above, the plate clamping shaft 8 that applies tension to the plate 1 only supports the reaction force of the plate tension at both ends, so there is a risk that the plate clamping shaft 8 may be distorted.

Therefore, there is a drawback that a uniform tension is not applied to the plate 1, and the pressure of the plate 1 is not uniform, so that the resistance against the plate falling out is not uniform.

The present invention has been proposed in order to eliminate the above-mentioned drawbacks of the conventional art, and it is an object of the present invention to provide a plate clamping device that has no fear of plate omission.

The embodiments shown in the drawings will be explained below.
The figure shows the first embodiment, and 15 is a plate cylinder with a groove (g) in a part of it.
-h-i) is the same, and the plate clamping shaft 16 is rotatably fitted into the spacer groove (g-h-i) so that its center is eccentric from the center of the arcuate groove. .

17 is a plate clamping shaft 16 that is installed along the axial direction of the plate clamping shaft 16 in a crescent-shaped space formed by the circular arc wall of the groove (g-h-i) and the outer periphery of the plate clamping shaft 16. With a supporting body,
Disc springs 18 are held on the support body 17 at several locations in the width direction.

Further, there are pillows 19 at both ends of the plate cylinder 15, and the pillows 19 are provided with a hole 21 through which the neck portion 20 of the plate clamping shaft 16 can pass.

The hole 21 is close to the shaft neck 20, and the gap 22 is formed by the spring action of the disc spring 18 to hold the plate 23 through the fastening shaft 16 at the part f (FIG. 10). This is appropriately determined in consideration of securing the gap p that allows the insertion of the .

Further, the plate clamping shaft 16 is provided with a hole 24 into which the plate end 6 is inserted and a notch 25 to ensure a gap p.

FIG. 6 shows the plate 23 attached to the plate cylinder 15.

Further, FIG. 8 is an enlarged detailed view of part a of FIG. 6, showing the state before the plate 23 is attached, and FIG. 10 shows the state after the plate 23 is attached.

The plate cylinder 15 is a rotatable roller with a finite width and has grooves (
gh-1) is cut parallel to the rotation axis of the plate cylinder.

In addition, 26.27 in Fig. 13 is the screw allowance, and 28.2
Reference numeral 9 denotes a guide member attached to the plate cylinder 15 that guides the threaded rods 26 and 27.

Next, to explain the operation, both ends of the plate 23 are bent as shown in FIG. 9, the plate cylinder 15 and plate clamping shaft 16 are placed in the state shown in FIG. 8, and the b end of the plate 23 is first inserted into the gap p.

Next, part 0 of the plate is wrapped around the plate cylinder 15, and the other end d is inserted into the hole 24 of the plate clamping shaft 16, and then the plate clamping shaft 16 is connected to the first plate cylinder 15.
Rotate counterclockwise as shown in Figure 0 to tighten the plate 23 around the plate cylinder 15.

When tightened, the plate clamping shaft 16 presses the contact point e and the plate presser part f shown in FIG. 10 by the action of the support 17 and disc spring 18 and the reaction of the plate 23 tightening.

Since there are disc springs 18 at several locations in the width direction as shown in FIG. 11, the force pressing down on portions e and f is uniform in the width direction.

This means that the plate clamping shaft 16 is bent by force when clamping the plate.
The action of pressing and preventing parts z0 and f is z0, so plate 2
3 around the plate cylinder 15 can be made uniform in the width direction, and the clamping force of the plate 23 is a force that resists the force that tries to pull out in one direction as shown in FIG. 10. Holding down the parts means that the force can be applied uniformly in the width direction.

Further, the thickness of the plate 23 can be changed.

That is, if the thickness of the plate 23 is changed, the dimension of the f section changes, and therefore the force acting on the disc spring 18 changes.

In this case, in this device, the relative dimensions between the support 17 and the clamping shaft 16 can be changed by adjusting the support 17 in the directions of arrows m and n shown in FIG. can.

Therefore, the amount of compression of the disc spring 18 inserted between the support body 17 and the clamping shaft 16 changes, and the force acting can be changed.

The movement of the support body 1T can be adjusted using the threaded rod 2 shown in FIG.
6 and 2T to increase the spring force of the disc spring 18, turn the circular groove h (
This is done by shifting the position of the disc spring 18 incorporated in the support 17 from the line connecting the center of the circle shown in FIG. 1 and the center of the plate clamping shaft 16.

Note that when the disc spring 18 is located on this center line, the spring force is the lowest.

Further, even if the disc spring 18 is destroyed due to corrosion or the like and loses its spring action, the disc spring 18 can be used without being removed.

That is, in this case, the threaded rod 27 is loosened, the threaded rod 26 is screwed in, the support body 11 is moved in the n direction, and the 1 support body 1T is supported by the contact point q on the plate clamping shaft 16 and held in the state shown in FIG. generates force.

Next, another embodiment of FIG. 15 will be explained. In this embodiment of FIG. 15, the shape of the d end of the plate 23 is bent to the state shown by r, and the hole 24 of the plate clamping shaft 16 is replaced by the hole 24 shown by S. Although a stepped portion is provided and the r portion of the plate 23 is caught and tightened, there is no difference in operation and effect from the previous embodiment.

Next, the embodiment shown in FIG. 16 will be described. Although this embodiment uses a leaf spring 30 in place of the disc spring 18, there is no difference in the operation and effect.

In each of the above embodiments, the disc spring 18 is held on the support 11, but in the present invention, the disc spring 18 may be removed and the plate clamping shaft 16 may be supported only by the support. can.

As described in detail above, in the present invention, the support that presses both ends of the plate between the opening wall of the groove and the plate clamping shaft is connected to the outer periphery of the plate clamping shaft and the arcuate wall of the groove of the plate cylinder. It is installed along the axial direction of the plate clamping shaft in the crescent-shaped space formed by There is no risk of this happening.

Further, in the present invention, since the spring member is held on the support body, the force for tightening the plate and the force for pressing the plate are exerted by its elasticity, making it extremely reliable.

Furthermore, in the present invention, since the center of the clamping shaft and the center of the arcuate wall of the groove are eccentric (forming a crescent-shaped space), the supporter can be moved along the arc of the groove bottom. The force acting on the plate can be adjusted, and changes in the thickness of the plate can be dealt with, and the force with which the plate is pressed can be optimally adjusted.

In addition, in the present invention, if a disc spring is used as the spring member, the space can be further reduced.

[Brief explanation of the drawing]

Figure 1 is a front view showing details of the plate clamping shaft of a conventional plate clamping device;
Figure 2 is a side view showing the tightening mechanism of the plate clamping shaft, Figure 3 is a perspective view of the plate, Figure 4 is a side sectional view of the plate clamping part, and Figure 5 is the clamping mechanism of the plate clamping part. 6 is a side sectional view showing the plate clamping state; FIG. 6 is a side sectional view of a plate clamping device showing an embodiment of the present invention; FIG. 7 is a side view of the groove in the plate cylinder; FIGS. 8 and 10. and Fig. 14 is a detailed view of part a in Fig. 6, which is a cross-sectional view with different operating positions of the plate clamping shaft or support, Fig. 9 is a perspective view of the same plate, and Fig. 11 is A of Fig. 6. -A cross-sectional view, Figure 12 is a B-B cross-sectional view of Figure 11,
FIG. 13 is a cross-sectional view showing details of the support adjusting mechanism;
FIG. 5 is a side sectional view of a plate clamping device showing another embodiment, and FIG. 16 is a front sectional view of the plate clamping device showing still another embodiment. Explanation of the main parts of the figure, 15... plate cylinder, g-h-i...
・Groove, 16... plate clamping shaft, 17... support, 18...
·Disc spring.

Claims (1)

[Scope of Claims] 1. In a plate clamping device of a printing press in which a thin plate is mounted, a plate cylinder having a groove that is parallel to the axis of the plate cylinder, is open on the surface, and has an arcuate wall at the bottom. , a plate clamping shaft rotatably fitted into the groove so as to have its center at a position eccentric from the center of the circular arc wall of the groove of the plate cylinder, an outer periphery of the plate clamping shaft and the circular arc wall of the groove; A support body is installed in the crescent-shaped space to be movable along the axial direction of the plate clamping shaft and along the arc of the groove, and the support body holds both ends of the plate in the above-mentioned manner. A plate clamping device characterized in that it is pressed between an opening wall of a groove and a plate clamping shaft. 2. In the plate clamping device of a printing press in which a thin plate is mounted, a plate cylinder having a groove that is parallel to the axis of the plate cylinder, is open on the surface, and has an arcuate wall at the bottom; a groove in the plate cylinder; A plate clamping shaft is rotatably fitted into the groove so that its center is eccentric from the center of the circular arc wall, and a crescent-shaped plate is formed by the outer periphery of the plate clamping shaft and the circular arc wall of the groove. A support body movably incorporated in the space along the axial direction of the plate clamping shaft and along the arc of the groove, and a spring member held by the support body, and the support body and the spring member A plate clamping device characterized in that both ends of the plate are pressed between an opening wall of the groove and a plate clamping shaft.