JPH038433Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a plate bending device suitable for planographic printing and the like.

To attach the flat plate to the plate cylinder, as shown in Fig. 1, a groove is formed on the outer circumference of the plate cylinder A, both ends of the flat plate B are bent, and one bent end B1 is bent. While penetrating into the groove A1 of the plate cylinder A, wrap it around the outer periphery of the plate cylinder A, and then wrap the other bent end B2 into the groove A1.
Then, by tightening the fastener provided in this groove A1, the planographic plate B is attached to the plate cylinder A.
It is fixed to the surface of the

In order to wrap and fix the flat plate B around the plate cylinder A in this way, both ends of the flat plate B must be bent, but this work is usually done manually using a jig or the like. was.

That is, in this method, the planographic plate is placed on a plate setting plate, the vicinity of the bent end is pressed and fixed with a pressing block, etc.
The bent end is bent by some means to bend it at a predetermined angle.

However, the above-mentioned planographic plates are available in various sizes, and for this reason, the plate installation plate is divided into two in the longitudinal direction into a fixed side plate and a movable side plate, and the movable side plate is moved according to the length of the planar plate. However, if the flat plate is placed on the plate with a distance between the two, the central part of the flat plate will loosen, and this will cause the edges of the flat plate to be adjusted accurately according to the circumference of the plate cylinder. It has become impossible to bend the plate, and it has been pointed out that when it is wrapped around the plate cylinder, the length of the plate becomes too long, or vice versa, it becomes short.

This invention was devised in view of the above-mentioned drawbacks, and its purpose is to provide a plate bending device that allows a flat plate to be placed on a plate setting plate without slack.

In order to achieve the above object, the present invention enables the movable plate to be adjusted at any movement adjustment position by interlocking the joining ends of the fixed plate and the movable plate, which are divided into halves in the longitudinal direction, in a comb shape. The central part is designed to ensure a mounting surface for the flat plate on which it is installed.Examples of the present invention will be described in detail with reference to FIG. 2 and the subsequent drawings.

2 and 3 show the overall structure of the plate bending device according to this invention, and FIG. 4 shows an enlarged view of the bending portion of the device.

In each figure, the plate bending device includes a frame 2 installed on a bed 1, a plate setting plate 3 installed on the upper surface of this frame 2, and a plate 2 on both ends of the plate setting plate 3. A rotating plate 4 is rotatably attached to the plate 3 via a shaft 4a passing through both sides of the plate, and a rotating plate 4 is integrally attached between each of these rotating plates 4 via a mounting bolt 4b. A pressing block 5, a second rotating plate 6 which is rotatably attached to the tip of the rotating plate 4 via a shaft 6a at the tip of the pressing block 5, and these second rotating plates. 6, an eccentric cam 8 provided on the side of the frame 2 at the lower part of the steering plate 4;
In the vicinity of this eccentric cam 8, a mounting block 9
a pair of stopper screws 10,
11, a stopper arm 12 that is integrally attached to the tip of the turning plate 4 and whose lower end engages the cam floor surface of the cam 8, and the bending block 7 is fixed to the tip surface of the pressing block 5. It is roughly composed of a latch 13 for

The above-mentioned plate setting plate 3 is divided in half into a fixed plate 14 shown on the right side in the figure and a movable plate 15 shown on the left side, and the joint ends of both plates 14 and 15 are interlocked alternately in a comb shape. The movable side plate 15
The structure is such that an opening is not formed in the center even when the is moved. The lower part of the movable side plate 15 has a block 17 that is screwed into a screw 16 that is axially layered in parallel to the longitudinal direction inside the frame 2, and a handle 18 that protrudes from one side of the block 17. It is made movable by rotating it, which allows it to be adapted to the length of the plate.

19 has one end inserted through a block 20 fixed to the inner surface of the frame 2, and the other end inserted into a block 21 attached to the lower surface of the movable plate 15 to guide it during the movement. This is a guide rod for

Furthermore, a long hole 22 is provided along one side of the frame 2, that is, on the moving side plate 15 side.
By inserting the shaft 4a into the elongated hole, the movable side plate 15 is moved together with the guide rod 19. When the movable side 15 is fixed, the shaft 4a is inserted into the elongated hole. A fixing nut 23 screwed into the
By tightening the movable rod, the movable rod is fixed in an appropriate position.

The tip of the stationary plate 14 has a sharp edge, while the edge of the movable plate 15 has a slightly obtuse angle with a two-step edge. Plano B
When it is mounted on the flat body A, the angular shape of both ends thereof is shaped to match the groove and the state in which it is mounted.

The plate bending device according to this invention is constructed as described above, and the movement of each part will be explained next.

First, the state shown in FIGS. 2 to 4 shows a state in which the rotating plate 4 is fixed to the distal edges of the fixed plate and the movable plates 14 and 12, respectively.

From this state, when the operating lever 8b protruding from the eccentric cam 8 is rotated counterclockwise, the cam 8 is disengaged by the lock arm.

Then, when the cam 8 is further rotated, the lower surface of the rotation plate 4 comes into contact with the cam floor surface of the cam 8, and as the rotation operation is performed, it rises about the shaft 4a, thereby causing the pressing block to move upward. 5 and bending block 7 are both spaced apart from each plate 14,15.

When the rotation of the cam 8 is further continued, the cam floor surface comes into contact with the upper stopper bolt 10, thereby restricting the upward position of the rotating plate 4 and the pressing block 5, and keeping them in this state. be done.

This state is shown by the two-dot chain line in FIG.

Then, in this state, if the flat plate B is placed on the plate 3 and the handle 18 is rotated to match the length of the flat plate, the movable plate 15 will be guided by the guide rod 19 and move. Position the edge of planographic plate B to an appropriate length. This time, the handle 2 provided on the stopper nut 23
By rotating 3a, the movable plate 15 is fixed to the inner surface of the frame 2.

When such positioning is completed, the cam 8 is rotated clockwise, and the cam 8 is again fixed in the state shown by solid lines in FIGS. 2 to 4 and 5.

At this time, the end of the planographic plate B is in a state of protruding from the edge of the plate 3, as shown in FIG. 5, and the top surface of the projecting end is in contact with the bottom surface of the bending block.

Next, by unlatching the latch 13 and pulling the handle 7a provided on the upper surface of the folding block downward in the direction of the arrow, the folding block 7 can be opened as shown by the two-dot chain line in FIG. axis 6
The flat plate B is rotated downward from point a, that is, from the edge portion of the plate 3, and thereby the flat plate B is bent at an angle corresponding to the angle of the edge formed at the end of the plate. That will happen.

Next, when this bending work is completed, the bending block 7 is pulled upwards again, the latch 13 is placed on it, and the eccentric cam 8 is then rotated counterclockwise, so that the turning plate 4 can be opened again. It rises about the shaft 4a as a starting point, thereby making it possible to take out the flat plate B with both ends bent.

Here, even if the flat plate B is long when installed, the joint ends of the fixed side plate 14 and the movable side plate 15 are engaged in a comb-teeth shape, so that the flat surface is maintained,
The central portion can be installed flat without loosening, and therefore, the above-mentioned bending operation can accurately form the edge portions at both ends corresponding to the length of the planar plate.

As explained in detail in the embodiments above, in the plate bending device according to the invention, the joint ends of the stationary side plate and the movable side plate are engaged in a comb shape, as described above. Even if the movable plate is moved according to the length of the plate, its center will not loosen, and therefore the plate can be positioned at a precise length according to the length of the plate and can be bent with high precision. This also allows the plate to be fitted onto the plate cylinder with high precision, which has the advantage of improving printing precision.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing how the flat plate is attached to the plate cylinder, Fig. 2 is a partially cutaway side view showing the entire plate bending device according to this invention, Fig. 3 is a plan view of the same,
The figure is a partial perspective view showing the configuration of the bending portion of the plate bending device, and FIG. 5 is a partial side view for explaining the operating state of the plate bending device. 3... plate for plate installation, 4... turning plate, 4a
... Rotating shaft, 5... Pressing block, 6a... Rotating shaft, 7... Bending block, 14... Fixed side plate, 15... Movable side plate.

Claims (1)

[Scope of utility model registration request] A plate installation plate having edge portions at both ends;
The plate bending device is equipped with pressing blocks at both ends of each edge portion and a bending block at the tip of the pressing block, and the plate installation plate is divided into a fixed side plate and a movable side plate. A plate bending device characterized in that the fixed side plate and the movable side plate are connected at their joint ends in a comb-teeth shape.