JPH0919997A - Plate twist regulator for plate cylinder of printing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To be able to mount a plate at the accurate position of a plate cylinder, to correct the oblique deviation of the plate to the cylinder and to eliminate the distortion of the plate generated in the case of regulating its twist. SOLUTION: After the both ends of a plate are fixed to a gripper side vise 4 and the opposite side vise 5 to the gripper end at a plate cylinder 2, the oblique deviation of the plate is corrected. In the state that the reference pin 12 of the gripper end side is embedded and removed from the reference pin hole to the gripper end side formed at the plate, the vise 5 is linearly moved (arrows 90, 91). On the other hand, the vise 4 is oscillated at the bearing 25 as a center by rotatably regulating the gripper side regulating bolts of both the ends (arrows 94, 95). The bearing 25 can be slide along the gripper side block 26 (arrows 92, 93). Since the gripper side reference pin is fixed to the vise 4, the end of the plate is position-regulated according to the vise 4, the oblique deviation of the plate is corrected, and the distortion of the plate generated in the case of regulating its twist can be eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate twist adjusting device for a plate cylinder of a printing machine, and more particularly, when the plate is mounted on the plate cylinder, the plate can be mounted at an accurate position and the plate can be mounted on the plate cylinder. After fixing, correct the misalignment of the plate with respect to the plate cylinder in the diagonal direction,
Moreover, the present invention relates to a plate twist adjusting device in a plate cylinder of a printing machine, which is capable of eliminating distortion of the plate that occurs during twist adjustment.

[0002]

2. Description of the Related Art In multicolor printing, a plurality of colors are overlaid on the same printing paper. Therefore, in order to eliminate color misregistration and obtain a high-quality printed matter, it is necessary to accurately register and mount the plate on the plate cylinder in the printing unit of each color.

By the way, it is relatively easy to position the plate in the circumferential direction and the axial direction of the plate cylinder. However, when the plate is obliquely displaced from the plate cylinder, this can be corrected. difficult. In particular, for a plate that is long in the circumferential direction of the plate cylinder and short in the axial direction, it is difficult to align the plate in an oblique direction, and it is often mounted in a state in which the plate cylinder is obliquely displaced. For this reason,
After fixing the plate on the plate cylinder, in order to correct the skew deviation of the plate,
The following first conventional example and second conventional example have been proposed.

[First Conventional Example] First, as a first conventional example, a plate mounting device described in Japanese Patent Publication No. 3-57861 will be described. A plan view of the plate cylinder 2 according to the first conventional example is shown in FIG. 8A. A notch 3 is formed in the plate cylinder 2 along the axial direction of the plate cylinder 2. Inside the notch 3, a vise side vise 40 and a tail side vise 41 are positioned side by side.

The support side vise 40 has a support side vise base 49 and a support side press plate 50, and reference pins 46 and 47 project from the support side vise 40. . Reference pin 4
Reference numerals 6 and 47 are fixed to the bottom surface in the notch 3.

On the other hand, the tail edge side vise 41 has a tail edge side vise base 51 and a tail edge side holding plate 52. The reference pin 48 projects from the tail edge side vise 41. The reference pin 48 is also fixed to the bottom surface in the notch 3, but can be projected or buried in the tail edge side vise 41. The tail edge side vise 41 is movable in the plate cylinder axis direction of the plate cylinder 2 (direction of arrow 90 or arrow 91).

When the plate 42 shown in FIG. 8B is mounted and fixed to the plate cylinder 2, first, the holding edge 42a of the plate 42 is fixed with the holding side vice 40 of the plate cylinder 2. At this time, the reference pin 4 described above
6 and 47, the reference pin holes 44 and 45 formed in the support side end portion 42a of the plate 42 are fitted and aligned, and the support side end portion 42a is supported by the support side vise 40. It is inserted between the holding side vise base 49 and the holding side pressing plate 50. Then, the support side pressing plate 50 is tightened to the support side vise 49, and the support side end portion 42a is sandwiched and fixed.

In this way, after the tail edge 42a of the plate 42 is fixed to the plate cylinder 2, the plate 42 is wound around the outer peripheral surface of the plate cylinder 2, and then the tail edge side 42b is gripped. Secure to the butt side vise side 41. The tail edge side vise 41 is provided with the retractable reference pin 48 as described above. When fixing the plate 42 to the plate cylinder 2, the reference pin 48 is made to project, and the reference pin 48 is fitted into the reference pin hole 43 formed at the tail edge side end portion 42b of the plate 42 for alignment. To do.

Then, the tail edge side end portion 42b is inserted between the tail edge side vise base 51 and the tail edge pressing plate 52 of the tail edge vise 41, and in this state, the tail edge side The tail edge side pressing plate 52 is fastened to the vise 51, the tail edge side end portion 42b of the plate is sandwiched, and fixed to the plate cylinder 2. Thus, version 4
After fixing both ends of 2 to the vise side vise 40 and the tail side vise 41, the plate tightening bolt 53 is tightened, and the tail side vise 41 is tightened.
Is moved in parallel in the direction of arrow 92 to bring the plate 42 into close contact with the outer peripheral surface of the plate cylinder 2.

As described above, the plate 42 is mounted and fixed on the plate cylinder 2. When it is found by the trial printing or the register detection device that the plate 42 is obliquely displaced with respect to the plate cylinder 2, the plate 4 is corrected to correct the displacement.
Adjust the twist of 2. The twist adjustment is performed by moving the tail edge side vise 41 in the direction of the arrow 90 or the arrow 91 while the tail edge side end portion 42b of the plate 42 is fixed by the tail edge side vise 41. .

At this time, the reference pin 48 is clamped on the tail edge side vise 41.
The reference pin 48 is buried so as not to hinder the movement of the reference pin 48. Thus, the reference pin 48 and the reference pin hole 43 of the plate 42 are
Then, the tail end vise 41 can be moved.
The tail edge vise 41 is moved by rotating and adjusting the bolts 54 and 55. By moving the tail edge side vise 41 in the directions of arrows 90 and 91, twist adjustment is performed to correct the skew deviation of the plate 42 while the plate 42 is fixed to the plate cylinder 2.

[Second Conventional Example] As a second conventional example, a plate twist adjusting mechanism described in Japanese Patent Laid-Open No. 6-134962 is shown. As shown in FIG. 9A, also in the second conventional example, a leading edge side vise 60 and a tail edge side vise 61 are provided in parallel inside the notch 3 formed in the plate cylinder 2. .
The support side vise 60 has a support side vise base 63 and a support side presser plate 64, and the support side vise 60 includes the bolt 6
It is held swingably around 2. Also, the tail edge side vise 61 is the tail edge side vise base 65 and the tail edge side holding plate 66.
have. The tail edge side vise 61 is movable in the plate cylinder axis direction of the plate cylinder 2 (direction of arrow 90 or arrow 91).

When the plate 42 is mounted and fixed to the plate cylinder 2, the holding edge 42a of the plate 42 is held by the holding side vise base 63 of the holding side vise 60 and the holding side pressing plate 64. It is sandwiched between and fixed. Then, the tail edge side end 42b of the plate 42 is clamped at the tail edge side vise 61, and the tail edge side vise base 65 and the tail edge side presser plate 6 are provided.
It is sandwiched between 6 and fixed. In this way, after fixing both ends of the plate 42 to the vise side vise 60 and the tail side vise 61,
The vise edge side vise 61 is translated in the direction of arrow 92, and the plate 4
2 is brought into close contact with the outer peripheral surface of the plate cylinder 2.

After the plate 42 is mounted on the plate cylinder 2 and fixed, when adjusting the twist of the plate 42, the adjusting bolt 67 is rotationally adjusted so that the tail edge vise 61 is moved in the direction of arrow 90 or arrow 91. Move to. In the second conventional example, since the gripping side vise 60 swings around the bolt 62 as described above, the tail side vise 61 is moved in the directions of arrows 90 and 91. As shown in FIG. 9B, the holding side vise 60
Swings in the directions of arrows 94 and 95.

In this way, the arrow 9 of the vise 61 on the tail edge side
Move in the 0, 91 direction and the arrow 9 of the holding side vise 60
The plate 42 with respect to the plate cylinder 2 is swung in the directions of 4 and 95.
The deviation in the diagonal direction is corrected. Note that FIG. 9B is a development view of the plate cylinder 2.

[0016]

The first conventional example and the second conventional example have the following problems. First, in the first conventional example, when adjusting the twist of the plate 42, the tail edge side vise 41 is moved in the directions of arrows 90 and 91, but the tail side vise 40 is at a predetermined position. It remains fixed. In particular, the reference pins 46 and 47 are provided on the bottom surface of the notch 3 and are fixed in position with respect to the plate cylinder 2. Since the reference pin holes 44 and 45 formed in the holding edge 42a of the plate 42 are fitted into the reference pins 46 and 47 fixed to the plate cylinder 2, the holding side I cannot move the vise 40.

For this reason, the tail edge vise 41 is attached to the arrow 90,
When it is moved in the 91 direction, the plate 42 is distorted due to the relationship with the holding-side end portion 42b of the plate 42 fixed to the holding-side vise 40. That is, in the first conventional example, plate 4
It is possible to make a fine twist adjustment within the limit that does not cause distortion in 2, but if you make a twist adjustment beyond this limit,
There is a problem that the plate 42 is distorted and wrinkles are formed on the plate 42. Therefore, in the first conventional example, a mechanism for twisting the plate cylinder axis of the plate cylinder 2 (plate cylinder cocking mechanism) is required to adjust the oblique image of the plate, and the structure becomes complicated.

On the other hand, in the second conventional example, as described above, the gripping side vise 60 has the arrow 94 centered on the bolt 62,
It can swing in 95 directions. Therefore, the vise 6 on the tail side
When 1 is moved in the directions of arrows 90 and 91, the gripping side vise 60 also swings in the directions of arrows 94 and 95, and the plate 42 is not distorted.

However, in the second conventional example, the holding-side vise 60 is in an unstable state in which it can swing around the bolt 62 and is not positioned with respect to the plate cylinder 2, so that the plate 4
When the second support edge 42a is fixed to the support vice 60, accurate alignment cannot be performed. Therefore, the holding edge 42a of the plate 42 with respect to the plate cylinder axis of the plate cylinder 2
There is a high possibility that they will be skewed and fixed. That is, the second
In the above-mentioned conventional example, there is a problem that it is difficult to perform accurate positioning when the plate 42 is mounted and fixed on the plate cylinder 2.

Therefore, according to the present invention, when the plate is mounted on the plate cylinder,
The plate can be mounted in the correct position, and after fixing the plate to the plate cylinder, correct the skew displacement of the plate with respect to the plate cylinder,
Moreover, it is an object of the present invention to provide a plate twist adjusting device and an adjusting method in a plate cylinder of a printing machine, which can eliminate the distortion of the plate that occurs during the twist adjustment.

[0021]

A plate twist adjusting device for a plate cylinder of a printing press according to claim 1 is provided in a groove formed in the plate cylinder axial direction of the plate cylinder, and is arranged in the plate cylinder axial direction. A first clamp, which is located along the outer periphery of the plate cylinder and which fixes the first end of the plate, has a swing shaft movable in a direction substantially orthogonal to the axial direction of the plate cylinder. And swings about the swing axis on substantially the same plane as the outer peripheral surface of the plate cylinder.
A clamp, which is a second clamp that is provided in the groove and that is located along the axial direction of the plate cylinder and that fixes the second end of the plate mounted on the outer peripheral surface of the plate cylinder in the axial direction of the plate cylinder. A second clamp, which is freely movable, and the first clamp is pressed toward the inner wall of the groove of the plate cylinder to bring the first clamp and the inner wall of the groove of the plate cylinder into contact with each other to bring the first clamp to a predetermined reference position. It is characterized in that it is provided with a reference position spring for positioning, and adjustment bolts provided on both sides sandwiching the swing shaft of the first clamp and adjusting the gap between the first clamp and the inner wall of the groove of the plate cylinder.

A plate twist adjusting device for a plate cylinder of a printing machine according to a second aspect is the plate twist adjusting device for a plate cylinder of a printing machine according to the first aspect, which is provided in the first clamp, A first reference pin that fits in a first end reference hole formed at one end and positions the first end of the plate with respect to the first clamp, and is capable of protruding or being buried in the groove of the plate cylinder. It is provided and the second of the plate in the protruding state
A second reference pin that fits into a second end reference hole formed in the end portion, positions the second end portion of the plate with respect to the second clamp, and comes out of the second end reference hole in a buried state. It is characterized by having.

The plate twist adjusting device in the plate cylinder of the printing press according to claim 3 is provided in a groove formed in the plate cylinder axial direction of the plate cylinder, and is located along the plate cylinder axial direction. A first clamp for fixing a first end portion of a plate mounted on the outer peripheral surface of the cylinder, having a swing shaft movable in a direction substantially orthogonal to the plate cylinder axis direction. A first clamp that swings on the substantially same plane as the outer peripheral surface of the plate cylinder, and is provided in the groove, is positioned along the axial direction of the plate cylinder, and is mounted on the outer peripheral surface of the plate cylinder. A second clamp for fixing the second end of the second clamp, which is movable in the plate cylinder axial direction, and the first clamp is positioned and fixed at a predetermined reference position or released from the reference position. A reference position fixing member is provided.

[0024]

In the plate twist adjusting device for the plate cylinder of the printing press according to the first aspect, the first clamp is pressed toward the inner wall of the groove of the plate cylinder by the reference position spring and positioned at a predetermined reference position. It is possible to fix the first end of the plate with the one clamp positioned at the predetermined reference position.
In this way, the first end of the plate can be fixed to the first clamp located at the predetermined reference position.

Further, the adjusting bolts provided on both sides of the swing shaft of the first clamp adjust the distance between the first clamp and the inner wall of the groove of the plate cylinder so that the first clamp is attached to the outer peripheral surface of the plate cylinder. Is swayed on the substantially same plane as, or moved in a direction substantially orthogonal to the plate cylinder axis direction. On the other hand, the second clamp is movable in the plate cylinder axis direction.

Therefore, after the plate is mounted and fixed on the plate cylinder, the second clamp is moved in the axial direction of the plate cylinder, and the first clamp is swung to adjust the twist of the plate with respect to the plate cylinder. You can

Further, since the first clamp is pressed against the inner wall of the groove of the plate cylinder by the reference position spring, the position of the first clamp is adjusted by the adjusting bolt to correct the skew displacement of the plate. However, if the adjustment by the adjustment bolt is released, the first clamp returns to the predetermined reference position by the reference position spring.

In the plate twist adjusting device in the plate cylinder of the printing press according to the second aspect, the first clamp is provided with the first reference pin, and the first reference pin is provided at the first end of the plate. The first end reference hole formed is fitted to position the first end of the plate with respect to the first clamp.

A second reference pin is provided in the groove of the plate cylinder so as to project or be buried therein. Then, the second reference pin is fitted in a second end reference hole formed in the second end of the plate in a protruding state to position the second end of the plate with respect to the second clamp, It is designed to come off from the second end reference hole in a buried state.

Therefore, while the first reference pin is fitted in the first end reference hole of the plate and the second reference pin is projected, the second reference pin is fitted in the second end reference hole of the plate. By combining the plates, the plate can be mounted at an accurate position with respect to the plate cylinder. Also, the second reference pin is buried and the second
By removing the reference pin from the second end reference hole of the plate,
It is possible to make the second clamp, to which the second end of the plate is fixed, movable in the axial direction of the plate cylinder.

In the plate twist adjusting device in the plate cylinder of the printing press according to the third aspect, the first clamp can be positioned and fixed at a predetermined reference position by the reference position fixing member. In this way, the first end of the plate can be fixed to the first clamp located at the predetermined reference position.

Further, the first clamp is released from the reference position by releasing the fixation by the reference position fixing member,
It can oscillate on substantially the same plane as the outer peripheral surface of the plate cylinder or can move in a direction substantially orthogonal to the axial direction of the plate cylinder. On the other hand, the second
The clamp is movable in the axial direction of the plate cylinder.

Therefore, after the plate is mounted and fixed on the plate cylinder, the second clamp is moved in the axial direction of the plate cylinder, and the first clamp is swung to adjust the twist of the plate with respect to the plate cylinder. You can

[0034]

【Example】

[Overall Configuration] An embodiment of a plate twist adjusting device in a plate cylinder of a printing machine according to the present invention will be described with reference to the drawings. FIG.
[FIG. 4] is a plan view of a plate cylinder in the present embodiment. A notch 3 is formed in the plate cylinder 2 in the axial direction of the plate cylinder. Then, inside the notch 3, the holding-side vise 4 serving as the first clamp is provided.
Further, the tail edge side vise 5 as the second clamp is provided in parallel along the plate cylinder axial direction of the plate cylinder 2.

(Structure of the support side vise 4) The support side vise 4 is composed of a support side vise base 4a and a support side pressing plate 4b. The holding side pressing plate 4b is composed of two divided plates as shown in FIG. FIG. 2 is a front view of the holding side vise 4. As shown in FIG. 2, U-shaped members 40 are fixed at two positions on the bottom surface of the holding side vise table 4a. The fitting piece 39 fixed to the inner wall of the notch 3 is inserted into the fitting space 40S of the U-shaped member 40. That is, the holding edge vise 4 is held in the notch 3 by the fitting piece 39, and the fitting piece 39 extends, that is, in the directions of arrows 92 and 93 (directions substantially orthogonal to the plate cylinder axis direction). Can be moved to.

A bearing 25 is fixed by a pin 24 to the bottom surface of the holding side vise table 4a. On the other hand,
A support block 26 is fixed to the bottom surface of the notch 3 with a bolt 27 and a pin 28. As shown in FIG. 1, the leading edge block 26 has a leading edge block groove 26.
S is formed, and in the holding side block groove 26S,
A bearing 25 fixed to the bottom surface of the holding side vise table 4a is fitted.

The width of the bearing 25 is almost the same as the width of the bite side block groove 26S, and the bearing 25 slides along the bite side block groove 26S in the directions of arrows 92 and 93. Further, the gripping side vise 4 swings around the bearing 25 in the directions of arrows 94 and 95. As shown in FIGS. 1 and 2, the holding edge vise 4 oscillates on substantially the same plane as the outer peripheral surface 2G of the plate cylinder 2. In addition, the above-mentioned fitting piece 39
Is narrower than the fitting space 40S of the U-shaped member 40, and does not become an obstacle when the holding-side vise 4 swings in the directions of arrows 94 and 95.

As shown in FIG. 1, springs 32 as reference position springs are provided on both sides between the leading edge side vise 4 and the tail edge side vise 5, respectively. The force 4 and the tail edge side vise 5 are urged in directions to repel each other. The holding side vise base 4a of the holding side vise 4 has holding side adjustment bolts 55 and 56 (adjustment bolts) screwed into and penetrated on both sides. The leading edge adjusting bolts 55, 56 are for adjusting the spacing between the leading edge vise 4 and the inner wall of the notch 3.

The tip ends of the holding-side adjusting bolts 55, 56 are in contact with the contact plate 35 fixed in the notch 3. That is, when the holding side adjusting bolts 55 and 56 are tightened, the holding side vise 4 moves in the direction of arrow 93 against the bias of the spring 32. And this holding side adjustment bolt 5
By separately turning 5 and 56, the gripping side vise 4 can be swung in the directions of arrows 94 and 95 about the bearing 25. For example, if the holding-side adjusting bolt 55 is tightened more than the holding-side adjusting bolt 56,
Since the left side of the gripping side vise 4 shown in FIG. 1 largely moves in the direction of arrow 93, the holding side vise 4 swings in the direction of arrow 94.

When the holding edge adjusting bolts 55 and 56 are loosened, the holding edge vise 4 is urged by the spring 32 to abut against the inner wall of the notch 3 and is positioned parallel to the plate cylinder axis. This state is the reference position of the holding side vise 4.

The holding-side vise base 4a of the holding-side vise 4 has, in addition to the holding-side adjusting bolts 55 and 56, stopper bolts 51 and 52 screwed into and penetrated on both sides. FIG.
FIG. 4 is a sectional view taken along the line IV-IV shown in FIG. 1. As shown in FIG. 4, the tip of the stopper bolt 51 is screwed into and penetrates the gripping side vise base 4 a, and comes into contact with the backing plate 35 fixed to the inner wall of the notch 3 by the backing plate fixing bolt 41. ing. The same applies to the stopper bolt 52. The stopper bolts 51 and 52 are for adjusting the reference position of the leading edge vise 4.

By rotating each of the stopper bolts 51 and 52, the leading end can be brought into contact with the contact plate 35, and the holding-side vise 4 can be positioned parallel to the plate cylinder axis, and an appropriate reference position can be set. Can be secured. In addition, after the stopper bolts 51 and 52 are respectively rotated and adjusted, the lock nuts 53 and 54 are tightened to fix the stopper bolts 51 and 52 to the holding side vise base 4a. If self-locking bolts are used as the stopper bolts 51 and 52, the lock nuts 53 and 54 are unnecessary.

Further, the support side vise base 4a of the support side vise 4 is provided with two support side reference pins 37 and 38 (first reference pins) for performing positioning when mounting the plate. It is fixed. FIG. 3 shows a sectional view taken along the line III-III in FIG. The leading edge side reference pin 37 is directly fixed to the leading edge side vise base 4 a, and moves integrally with the leading edge side vise 4. The gripping side reference pin 38 is also directly fixed to the gripping side vise base 4a.

(Structure of Vise 5 on the tail side) Vise 5 on the tail side
Similarly, like the tail side vise 4, the tail edge side vise base 5a and the tail edge side holding plate 5b are included. The tail edge side pressing plate 5b is composed of two divided plates as shown in FIG. The tail edge side vise 5 is placed and held on the bottom surface inside the notch 3, and the tail edge side vise 5 is movable in the directions of arrows 90 and 91 (plate cylinder axis direction). .

The movement of the tail edge side vise 5 is adjusted by rotating the tail edge side bolt 6. The tail edge side bolt 6 is screwed into and penetrates the side surface of the plate cylinder 2, and the bolt tip 9 is located in contact with the side surface of the tail edge side vise 5. A pin 8 to which a spring 7 is attached is positioned on the side surface opposite to the tail edge vise 5. And the spring 7 is a vise 5 on the tail side.
Is urged in the direction of arrow 90 so that the bolt tip 9 is always urged to contact the side surface of the tail edge side vise 5. As a result, when the tail edge side bolt 6 is tightened, the tail edge side vise 5 moves in the direction of arrow 91, and conversely, when the tail edge side vise 6 is loosened, it moves in the direction of arrow 90. .

The tail edge side vise 5 is biased in the direction of arrow 93 by the springs 32 located on both sides as described above. A plate tightening bolt 18 is screwed into and penetrates the tail edge side vise 5a. By tightening the plate tightening bolt 18, the tail edge side vise 5 is moved in parallel in the arrow 92 direction. You can The plate tightening bolt 18 is the plate cylinder 2
It is for pulling the plate mounted on the outer peripheral surface 2G to bring it into close contact with the outer peripheral surface 2G.

A tail edge side block 13 is located between the inner wall of the notch 3 and the tail edge side vise 5. The tail edge side block 13 is fixed to the bottom surface inside the notch 3 by a pin 14 and a bolt 15. The tail edge side block 13 is provided with the tail edge side reference pin 12 (second reference pin). The tail edge side reference pin 12 is provided so as to project or be buried in the tail edge side block 13.

FIG. 5A is a sectional view taken along line VA-VA in FIG. 5A shows a state in which the tail edge side reference pin 12 projects from the tail edge side block 13, and FIG. 5B shows a state viewed from the VB direction shown in FIG. 5A. A locking pin 17 is implanted in the tail edge side reference pin 12 in a direction orthogonal to the pin axis.

On the other hand, in the tail edge side block 13, FIG.
As shown in FIG. 5, an L-shaped engaging groove 50 is formed, and the locking pin 17 is fitted and positioned in the engaging groove 50.
When the locking pin 17 is located at a high position in the engagement groove 50, the tail edge side reference pin 12 is provided with the spring 16 provided inside the tail edge side block 13 as shown in FIGS. 5A and 5B.
It is urged by and projects upward.

When burying the tail edge side reference pin 12,
The tail edge side reference pin 12 is pushed downward against the urging force of the spring 16, and the tail edge side reference pin 1 is pushed in.
Rotate 2 counterclockwise. As a result, the locking pin 17 provided on the tail edge side reference pin 12 enters the lower portion of the engagement groove 50 formed in the tail edge side block 13. FIG. 6 shows this state. Since the locking pin 17 is located at a lower portion of the engagement groove 50, the tail edge side reference pin 12 is held in a state of being buried in the tail edge side block 13.

[Plate Mounting Procedure] Next, the procedure for mounting and fixing the plate 20 shown in FIG. 7 on the plate cylinder 2 will be described. As shown in FIG. 7, the plate 20 has a holding edge 2 which is a first edge.
0a to the holding side reference pin hole 2 as the first end reference hole
1 and 22 are formed, and a tail edge side reference pin hole 23 as a second end reference hole is formed at the tail edge side end portion 20b which is the second end portion. Then, with respect to these tail edge side reference pin holes 21, 22 and tail edge side reference pin holes 23,
The pattern of the plate 20 is formed at an accurate position.

When mounting the plate 20 on the plate cylinder 2, first, the holding edge 20a is fixed to the holding vise 4 of the plate cylinder 2. At this time, the leading edge adjusting bolts 55 and 56 shown in FIG. 1 are loosened, and the leading edge vise 4 is positioned at the above-mentioned reference position. In this state, the support side reference pins 37 and 38 provided on the support side vise 4 are fitted into the support side reference pin holes 21 and 22 of the support side end portion 20a to perform alignment. The support edge 20a is inserted between the support vice base 4a and the support plate 4b.

The gripping side pressing plate 4b is adapted to be opened and closed by rotating the captive screw 4c shown in FIG. Tighten the screw 4c with the support side end 20a inserted between the support side vise base 4a and the support side presser plate 4b, and set the supporter side vise base 4a and the supporter side presser plate 4b. The gripping side end 20a of the plate 20 is sandwiched between and fixed.

In this way, after the edge side 20a is fixed to the edge side vise 4, the plate 20 is wound around the outer peripheral surface 2G of the plate cylinder 2. Then, subsequently, the tail edge side end portion 20b is attached and fixed to the tail edge side vise 5. At this time, the tail edge side reference pin 12 described above is projected from the tail edge side block 13.

The tail edge side reference pin 12 in the protruding state is fitted into the tail edge side reference pin hole 23 of the plate 20 to perform alignment, and the tail edge side end portion 20b of the plate 20 is gripped. It is inserted between the side vise 5a and the tail edge side pressing plate 5b. The tail edge side pressing plate 5b is adapted to be opened and closed by rotating the tail screw 5c shown in FIG. Tail end side 20
b is inserted between the tail edge side vise base 5a and the tail edge side presser plate 5b, the screw 5c is tightened, and the tail edge side vise platform 5 is inserted.
The tail edge side end portion 20b of the plate 20 is sandwiched and fixed between a and the tail edge side pressing plate 5b.

In this way, the tail edge side 20a and the tail edge side edge 20b of the plate 20 are aligned and fixed to the tail edge vise 4 and the tail edge vise 5, respectively, and then, as shown in FIG. Tighten the plate tightening bolt 18 shown in. The tail edge vise 5 is translated in the direction of arrow 92 by tightening the plate tightening bolt 18, and the plate 20 is mounted in close contact with the outer peripheral surface 2G of the plate cylinder 2. Since the tail edge side reference pin hole 23 formed in the plate 20 is formed on the long hole toward the outer peripheral direction of the plate cylinder 2 (see FIG. 7), the tail edge side vise 5 During the parallel movement, the tail edge side reference pin 12 fitted in the tail edge side reference pin hole 23 does not become an obstacle.

As described above, in the present embodiment, the plate 2 is attached to the plate cylinder 2.
When 0 is mounted, the holding-side vise 4 is positioned at a predetermined reference position, and the holding-side reference pin holes 21 and 22 and the holding-edge side reference pin hole 23 are respectively set to the holding-side reference. Pin 3
7, 38 and the tail edge side reference pin 12 are fitted and aligned. Therefore, the plate 20 can be mounted and fixed at an accurate position.

[Adjustment of Twist of Plate 20] After the plate 20 is mounted on the plate cylinder 2 as described above, it is found that the plate 20 is obliquely displaced and fixed to the plate cylinder 2, Twist adjust 20 to correct this skew displacement.
The twisting adjustment is performed by moving the tail edge side vise 5 in the directions of arrows 90 and 91 and swinging the tail edge vise 4 in the directions of arrows 94 and 95. The specific procedure of this twist adjustment will be described below.

In the case of adjusting the twist, first, the tail edge side reference pin 12 is buried in the tail edge side block 13 in order to make the tail edge side vise 5 movable in the directions of arrows 90 and 91. . In this case, the tail edge side reference pin 12 as described above
Is pushed downward, and in this state, the tail edge side reference pin 12 is rotated counterclockwise. As a result, the tail edge side reference pin 12 can be embedded in the tail edge side block 13 as shown in FIG.

When the tail edge side reference pin 12 is embedded as shown in FIG. 6, the tail edge side reference pin is inserted from the tail edge side reference pin hole 23 formed in the tail edge side end portion 20b of the plate 20. 12 will come off. In this way, the tail edge side reference pin hole 23
On the other hand, the tail edge side reference pin 12 is removed, and the tail edge side vise 5 is moved and adjusted in the directions of arrows 90 and 91. The movement adjustment of the tail edge side vise 5 is performed by rotationally adjusting the tail edge side bolt 6 as described above. Tail end side bolt 6
If the tail end vise 5 is tightened, the tail end vise 5 moves in the direction of arrow 91, and conversely, if the tail end side bolt 6 is loosened, it moves in the direction of arrow 90.

In this way, the grip vise side vise 5 is moved and the plate 2
Correct the deviation of 0 in the diagonal direction. As shown in FIG. 1, in the vicinity of the end of the tail edge side vise 5, the tail edge scale 3 is provided on the plate cylinder 2 side.
6 is fixed. Then, while observing the scale of the tail edge side scale 36, the position of the plate 20 fixed to the tail edge side vise 5 is aligned. As a result, the tail edge vise 5 can be moved in the directions of the accurate length arrows 90 and 91.

After moving the tail edge side vise 5 in the directions of arrows 90 and 91, the tail edge vise 4 is swung in the directions of arrows 94 and 95 to eliminate the distortion of the plate 20 which occurs during the twist adjustment. . As described above, the holding side vise 4 is swung by separately tightening the holding side adjusting bolts 55 and 56 located at both ends of the holding side vise 4.

As described above, the bearing 25 slides along the bite side block groove 26S in the directions of arrows 92 and 93. Therefore, when the bite side vise 4 is swung in the directions of arrows 94 and 95, At the same time, the holding side vise 4 can be moved and adjusted in the directions of arrows 92 and 93. Therefore, the distortion of the plate 20 can be more effectively eliminated.

An indicator plate 33 is provided at each end of the holding side vise 4. In the vicinity of the indicating plate 33, the holding side scales 34 are respectively located. If the movement of the support side vise 4 is adjusted while visually checking the alignment between the support side scale 34 and the indicator plate 33, the support side vise 4 can be swung by a more accurate movement amount. .

[Procedure for mounting a new plate 20 on the plate cylinder 2] When the plate 20 is detached from the plate cylinder 2 and the new plate 20 is mounted and fixed on the plate cylinder 2, the holding side is used. Vise 4
Must be returned to the reference position. In this case, the leading edge adjusting bolts 55, 56 located at both ends of the leading edge vise 4 are loosened as described above, and the tips of the stopper bolts 51, 52 are brought into contact with the contact plate 35. As a result, the leading edge vise 4 is returned to the predetermined reference position.

In this way, the holding side adjusting bolts 55, 56
It is possible to easily return the gripping side vise 4 to the predetermined reference position simply by loosening. On the other hand, on the tail edge side, the tail edge side reference pin 12 is projected from the tail edge side block 13 (FIG. 5). After this, a new plate 20 is attached to the plate cylinder 2.

[Other Embodiments] In the above embodiment, the spring 32 presses the holding edge vise 4 in the direction of the arrow 92, and the holding edge vise 4 and the inner wall of the notch 3 hold the holding edge vise. The force 4 is located at a predetermined reference position. However, as another embodiment, for example, the spring 32 may not be provided, and the state where the gripping side vise 4 and the inner wall of the notch 3 are separated may be set as the predetermined reference position. In this case, a reference position fixing member is provided on the plate cylinder 2 side and is engaged with the holding side vise 4 to lock the reference position.

The present invention is not limited to the above-described embodiments, but the gap between the first clamp and the inner wall of the groove of the plate cylinder is adjusted by adjusting bolts provided on both sides of the swing shaft of the first clamp. The first clamp is oscillated on the substantially same plane as the outer peripheral surface of the plate cylinder, or moved in a direction substantially orthogonal to the axial direction of the plate cylinder, and the second clamp is movable in the axial direction of the plate cylinder. Other configurations may be adopted as long as they are available.

[0069]

In the plate twist adjusting device for the plate cylinder of the printing press according to the first aspect of the invention, the first clamp is pressed toward the inner wall of the groove of the plate cylinder by the reference position spring and is positioned at a predetermined reference position. , The first end of the plate can be fixed with the first clamp positioned at the predetermined reference position.

In this way, the first end of the plate can be fixed to the first clamp located at the predetermined reference position.
Therefore, when mounting the plate on the plate cylinder, the plate can be mounted at an accurate position.

Further, the adjusting bolts provided on both sides of the swing shaft of the first clamp adjust the distance between the first clamp and the inner wall of the groove of the plate cylinder so that the first clamp is attached to the outer peripheral surface of the plate cylinder. Is swayed on the substantially same plane as, or moved in a direction substantially orthogonal to the plate cylinder axis direction. On the other hand, the second clamp is movable in the plate cylinder axis direction.

That is, after mounting and fixing the plate on the plate cylinder,
The plate can be twisted and adjusted with respect to the plate cylinder by moving the second clamp in the plate cylinder axial direction and swinging the first clamp. As described above, with a simple configuration, it is possible to correct the displacement of the plate on the plate cylinder in the oblique direction while the plate is being fixed to the plate cylinder, and to eliminate the distortion of the plate that occurs when adjusting the positional deviation.

Further, since the first clamp is pressed against the inner wall of the groove of the plate cylinder by the reference position spring, the position of the first clamp is adjusted by the adjusting bolt to correct the skew displacement of the plate. However, if the adjustment by the adjustment bolt is released, the first clamp returns to the predetermined reference position by the reference position spring. Therefore, when exchanging the plate, the first clamp can be easily returned to the predetermined reference position, and the work efficiency can be improved.

In the plate twist adjusting device in the plate cylinder of the printing machine according to the second aspect, the first clamp is provided with the first reference pin, and the first reference pin is provided at the first end of the plate. The first end reference hole formed is fitted to position the first end of the plate with respect to the first clamp.

Further, a second reference pin is provided in the groove of the plate cylinder so as to project or be buried therein. Then, the second reference pin is fitted in a second end reference hole formed in the second end of the plate in a protruding state to position the second end of the plate with respect to the second clamp, It is designed to come off from the second end reference hole in a buried state.

That is, while the first reference pin is fitted in the first end reference hole of the plate and the second reference pin is projected, the second reference pin is fitted in the second end reference hole of the plate. By combining the plates, the plate can be mounted at an accurate position with respect to the plate cylinder. Further, by embedding the second reference pin and removing the second reference pin from the second end reference hole of the plate, the second clamp to which the second end of the plate is fixed can be moved in the plate cylinder axis direction. be able to.

Therefore, it is possible to mount the plate at an accurate position, and after fixing the plate to the plate cylinder, bury the second reference pin to make the second clamp movable in the axial direction of the plate cylinder. The skew displacement of the plate on the plate cylinder can be easily corrected.

In the plate twist adjusting device for the plate cylinder of the printing press according to the third aspect, the first clamp can be positioned and fixed at a predetermined reference position by the reference position fixing member.

Thus, the first end of the plate can be fixed to the first clamp located at the predetermined reference position.
Therefore, when mounting the plate on the plate cylinder, the plate can be mounted at an accurate position.

Further, the first clamp is released from the reference position by releasing the fixation by the reference position fixing member,
It can oscillate on substantially the same plane as the outer peripheral surface of the plate cylinder, or can move in a direction substantially orthogonal to the axial direction of the plate cylinder. On the other hand, the second
The clamp is movable in the axial direction of the plate cylinder.

That is, after mounting and fixing the plate on the plate cylinder,
The plate can be twisted and adjusted with respect to the plate cylinder by moving the second clamp in the plate cylinder axial direction and swinging the first clamp. As described above, with a simple configuration, it is possible to correct the displacement of the plate on the plate cylinder in the oblique direction while the plate is being fixed to the plate cylinder, and to eliminate the distortion of the plate that occurs when adjusting the positional deviation.

[Brief description of the drawings]

FIG. 1 is a plan view of a plate cylinder showing an embodiment of a plate twist adjusting device in a plate cylinder of a printing machine according to the present invention.

FIG. 2 is a front view of the leading edge vise shown in FIG.

3 is a cross-sectional view taken along the line III-III shown in FIG.

FIG. 4 is a cross-sectional view taken along the line IV-IV shown in FIG.

5 is a view showing a state where the tail edge side reference pin shown in FIG. 1 is projected, A is a sectional view taken along the line VA-VA in FIG. 1, and B is a direction VB shown in FIG. 5A. It is the figure seen from.

6 is a view showing a state where the tail edge side reference pin shown in FIG. 1 is buried, A is a cross-sectional view taken along arrow VA-VA shown in FIG. 1, and B is VIB direction shown in FIG. 6A. It is the figure seen from.

FIG. 7 is a plan view showing a plate.

8A and 8B are views showing a first conventional example, in which A is a plan view of a plate cylinder and B is a plan view showing a plate.

9A and 9B are views showing a second conventional example, in which A is a plan view of the plate cylinder and B is a developed view of the plate cylinder.

[Explanation of symbols]

 2 ... Plate cylinder 3 ... Notch 4 ... Vise on the grip side 5 ... Vise on the grip side 6 ... Bolt on the grip side 12 ... tail edge side reference pin 20 ... version 21, 22 ... tail edge reference pin hole 23 ... tail edge side reference pin hole 25 ... ..Bearings 37, 38 ... gripping side reference pins 51, 52 ... stopper bolts 55, 56 ... gripping side adjusting bolts

Claims (3)

[Claims] 1. A first end portion of a plate, which is provided in a groove formed in the plate cylinder axial direction of the plate cylinder, is positioned along the plate cylinder axial direction, and is mounted on an outer peripheral surface of the plate cylinder. The first clamp is fixed and has a swing shaft that is movable in a direction substantially orthogonal to the plate cylinder axis direction, and swings on the same plane as the outer peripheral surface of the plate cylinder about the swing shaft. A first clamp that moves, a second clamp that is provided in the groove, is positioned along the axial direction of the plate cylinder, and fixes a second end of the plate that is mounted on the outer peripheral surface of the plate cylinder, A second clamp that is movable in the axial direction of the plate cylinder; a first clamp that presses the first clamp toward the inner wall of the groove of the plate cylinder;
A reference position spring for positioning the first clamp at a predetermined reference position by bringing the clamp and the inner wall of the groove of the plate cylinder into contact with each other. The reference position spring is provided on both sides of the swing shaft of the first clamp. And a plate twist adjusting device for a plate cylinder of a printing press, which is provided with an adjusting bolt for adjusting a gap between inner walls of grooves of the plate cylinder. 2. A plate twist adjusting device for a plate cylinder of a printing press according to claim 1, wherein a first end reference hole provided at the first clamp and formed at a first end of the plate is provided. A first reference pin that fits and positions the first end of the plate with respect to the first clamp; and a second end of the plate that is provided so as to project or be buried in the groove of the plate cylinder. The second formed on
A second reference pin that fits into the end reference hole, positions the second end of the plate with respect to the second clamp, and that is disengaged from the second end reference hole; Plate twist adjusting device in the plate cylinder of a printing machine. 3. A first end of a plate, which is provided in a groove formed in the plate cylinder axial direction of the plate cylinder, is located along the plate cylinder axial direction, and is mounted on the outer peripheral surface of the plate cylinder. The first clamp is fixed and has a swing shaft that is movable in a direction substantially orthogonal to the plate cylinder axis direction, and swings on the same plane as the outer peripheral surface of the plate cylinder about the swing shaft. A first clamp that moves, a second clamp that is provided in the groove, is positioned along the axial direction of the plate cylinder, and fixes a second end of the plate that is mounted on the outer peripheral surface of the plate cylinder, A printing machine, comprising: a second clamp that is movable in the axial direction of the plate cylinder; and a reference position fixing member that positions and fixes the first clamp at a predetermined reference position, or releases the reference position from the reference position. Twist adjustment device on the plate cylinder of the machine.