JP2000272095A - Machine plate exchanging apparatus and machine plate exchanging method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a machine plate exchanging apparatus which has a relatively simple constitution and accurately hooks or easily removes a hooking part of a gripping side of a plate cylinder and a gripping side end part of the machine plate and a machine plate exchanging method. SOLUTION: In a machine plate exchanging apparatus 7 which has an old plate removing mechanism 24 for removing an old plate fitted on a plate cylinder of a printing machine and a new plate mounting mechanism 25 for mounting a new plate on the plate cylinder, a gripping side hooking part for hooking the gripping side end parts of the old plate and the new plate is provided and the new plate mounting mechanism 25 and the old plate removing mechanism are arranged on the inner frame 23 and have a new plate holding member for holding the new plate and an old plate holding member for holding the neighborhood of the gripping side end part of the old plate and a moving mechanism 53 for moving the new plate holding member and the old plate holding member to the plate cylinder and a guiding means 47 for guiding them along the gripping side hooking part are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a printing plate changing apparatus and a printing plate changing method. More specifically, the present invention relates to a printing plate changing apparatus and a printing plate changing method for removing an old printing plate attached to a plate cylinder of a printing press and mounting a new printing plate on the plate cylinder.

[0002]

2. Description of the Related Art Heretofore, there has been known a so-called offset printing machine that uses a blanket cylinder around which a rubber blanket or the like is wound when printing a pattern or the like printed on a printing plate on paper. When printing is performed using this offset printing machine, in the printing unit, ink is supplied from the ink supply device to the plate cylinder on which the printing plate is mounted, and the ink adheres to the picture portion of the printing plate. This attached ink is
Printing is completed by transferring the ink transferred to the blanket cylinder in contact with the plate cylinder and transferred to the blanket cylinder to paper or the like.

When printing is completed, the printing plate (old printing plate) mounted on the plate cylinder is removed, and a new printing plate (new printing plate) is mounted on the plate cylinder in preparation for the next printing. The work of removing the old printing plate and mounting the new printing plate is time-consuming and time-consuming, and if it is attempted to perform it by hand, a significant burden is imposed on the operator.

For this reason, various printing presses are provided with a device for quickly removing an old printing plate from a plate cylinder and mounting a new printing plate. The ones disclosed in Japanese Utility Model Laid-Open No. 4-9736 and Utility Model Registration No. 3029642 are known.

The apparatus disclosed in Japanese Utility Model Laid-Open Publication No. Hei 4-9736 is a four-axis articulated arm. When removing an old printing plate, the old printing plate is attached to a suction pad attached to the tip of the arm. The vicinity of the edge on the grip side of the plate is sucked and held. Then, by driving the multi-joint arm, the old printing plate is removed from the engagement portion on the grip side of the plate cylinder. When the new printing plate is mounted, the suction pad attached to the tip of the arm is caused to suck and hold the vicinity of the edge on the grip side of the new printing plate. Then, by driving the multi-joint arm, a new printing plate is mounted on the gripping side engaging portion of the plate cylinder.

In the apparatus disclosed in Japanese Utility Model Registration No. 3029642, when a new printing plate is mounted, first,
The new printing plate is held by the upper receiving member attached to the pivotable holding member. Next, the edge of the new printing plate on the grip side is brought into contact with the plate cylinder, and the new printing plate is bent to some extent.
As a result, a certain amount of restoring force is accumulated in the new printing plate. In this state, the plate cylinder is rotated at a low speed in the forward direction, and the gripping side engaging portion of the plate cylinder is moved to the gripping end of the new printing plate. The grip-side end portion enters and engages with the grip-side engaging portion by the restoring force accumulated in the new printing plate, and is stretched on the peripheral surface of the plate cylinder rotating at a low speed.

[0007]

However, Japanese Utility Model Application Laid-Open No. 4-9736 and Utility Model Registration No. 302 described above.
The device disclosed in Japanese Patent No. 9642 has the following problem. That is, the apparatus disclosed in Japanese Utility Model Laid-Open Publication No. 4-9736 can travel in the width direction of the printing press, and operates while the tip of the arm corresponds to any angle. On the other hand, the mechanism that controls the entire articulated arm,
It was extremely complicated and expensive.

Further, in the apparatus disclosed in Japanese Utility Model Registration No. 3029642, in order to fit the gripping side end and the gripping side engaging portion, the gripping side engaging portion of the plate cylinder rotating at a low speed is required. At the moment when the edge of the new printing plate faces the edge of the new printing plate, the restoring force stored in the new printing plate must be applied. For this reason, it is difficult to accurately engage the grip-side end with the grip-side engaging portion. For example, the moment when the restoring force stored in the new printing plate 115A is applied is shifted, and the grip-side end is shifted. When the portion 116 does not engage with the engaging surface 111a of the gripping side engaging portion 109 and comes into contact with the peripheral surface of the plate cylinder (see FIG. 12A), or when the gripping side end portion 116 engages with the gripping side. When the plate cylinder and the bracket cylinder are rotated in a state in which there is a gap between the engagement surface 111a of the portion 109 (see FIG. 12B), the grip-side end 116 is deformed (see FIG. c)), the printing position is shifted and the desired accuracy cannot be obtained, or the new printing plate may be cut.

The present invention has been made based on such a technical background, has a simple structure, and accurately engages a gripping side engaging portion of a plate cylinder with a gripping side end of a printing plate. Another object of the present invention is to provide a printing plate changing apparatus and a printing plate changing method which can be easily detached.

[0010]

According to a first aspect of the present invention, there is provided a printing plate changing apparatus for removing an old printing plate attached to a plate cylinder of a printing press and a plate removing mechanism for removing a new printing plate from the plate cylinder. A plate replacing device having a new plate mounting mechanism to be mounted on
The plate cylinder is provided with a gripping side engaging portion that engages with gripping side ends of the old printing plate and the new printing plate, and the new printing plate mounting mechanism includes a new printing plate holding member that holds the new printing plate, A moving mechanism for moving the new printing plate holding member with respect to the plate cylinder, and guide means for guiding the new printing plate holding member moved by the moving mechanism to move along the grip side engaging portion. It is characterized by having.

According to the first aspect of the invention, when the new printing plate is mounted on the plate cylinder, the new printing plate is first held by the new printing plate holding member. At this time, the new printing plate is
The plate holder is held by the new printing plate holding member in a state in which the holding side engaging portion (engaging surface) of the plate cylinder is substantially parallel. Next, the grip side end of the new printing plate is brought closer to the grip side engaging portion of the plate cylinder by, for example, feeding out the new printing plate holding member. When the moving mechanism is operated in this state, the new printing plate holding member is moved by the guide means in a direction (parallel to the engaging surface) along the holding side engaging portion (engaging surface).
Move toward the plate cylinder while being guided by. For this reason,
The gripping end of the new printing plate and the gripping side engaging portion of the plate cylinder can be engaged with each other without causing a displacement or a gap. As described above, this printing plate changing device has a relatively simple configuration, and can accurately engage the gripping side engaging portion of the plate cylinder with the gripping side end of the new printing plate.

According to a second aspect of the present invention, there is provided a printing plate changing apparatus for removing an old printing plate attached to a plate cylinder of a printing press and a new printing plate for mounting a new printing plate on the plate cylinder. In the plate changing device having the mounting mechanism, the plate cylinder is provided with a gripping side engaging portion which engages with gripping side ends of the old printing plate and the new printing plate. An old printing plate holding mechanism for holding the vicinity of the edge of the plate on the grip side, a moving mechanism for moving the old printing plate holding mechanism with respect to the plate cylinder, and an old printing plate holding mechanism moved by the moving mechanism are included. Guide means for guiding movement along the side engagement portion.

According to the second aspect of the present invention, when the old printing plate is removed from the plate cylinder, first, the old printing plate holding mechanism is extended to engage with the gripping side engaging portion of the plate cylinder. The vicinity of the edge on the grip side of the old printing plate is held. When the moving mechanism is actuated in this state, the old printing plate holding mechanism moves the old printing plate holding mechanism out of the plate cylinder while being guided by the guide means in a direction (parallel to the engagement surface) along the grip side engagement portion (engagement surface). Move away. Therefore, the grip side end of the old printing plate and the grip side engagement portion of the plate cylinder can be easily separated. As described above, the printing plate changing device has a relatively simple configuration, and can easily detach the grip side end of the old printing plate from the grip side engagement portion of the plate cylinder.

According to a third aspect of the present invention, there is provided a plate changing apparatus for removing an old plate attached to a plate cylinder of a printing press, and a new plate for mounting a new plate on the plate cylinder. In the plate changing device having the mounting mechanism, the plate cylinder is provided with a gripping side engaging portion which engages with gripping side ends of the old printing plate and the new printing plate. It has a new printing plate holding member that holds the plate, and is arranged on the frame,
The old printing plate removing mechanism has an old printing plate holding mechanism for holding the vicinity of the edge of the old printing plate on the grip side, is disposed on the frame, and is configured to move the frame relative to the plate cylinder. And a guide means for guiding the frame to move along the grip side engaging portion.

According to the third aspect of the present invention, when the new printing plate is mounted on the plate cylinder, the new printing plate is first held by the new printing plate holding member disposed on the frame. At this time, the new printing plate is held by the new printing plate holding member in a state where the grip side end and the grip side engaging portion (engaging surface) of the plate cylinder are substantially parallel. Next, the grip side end of the new printing plate is brought closer to the grip side engaging portion of the plate cylinder by, for example, feeding out the new printing plate holding member. When the moving mechanism is actuated in this state, the frame moves toward the plate cylinder while being guided by the guide means in a direction (parallel to the engagement surface) along the grip side engagement portion (engagement surface). . At this time, since the new printing plate holding member arranged on the frame moves toward the plate cylinder together with the frame, the positional deviation and the gap between the grip side end of the new printing plate and the grip side engagement portion of the plate cylinder are reduced. Both can be engaged without causing them.

Further, when removing the old printing plate from the plate cylinder, first, the old printing plate holding mechanism arranged on the frame is extended, for example, so that the old printing plate engaged with the gripping side engaging portion of the plate cylinder is pulled out. The plate is held near the edge on the grip side. In this state, when the moving mechanism is operated, the frame is separated from the plate cylinder in a state where the frame is guided by the guide means in a direction (parallel to the engagement surface) along the holding side engagement portion (engagement surface). Moving. At this time, the old printing plate holding mechanism arranged on the frame moves away from the plate cylinder together with the frame, so that the gripping end of the old printing plate and the gripping side engaging portion of the plate cylinder are easily disengaged. Can be done. As described above, this printing plate changing device has a relatively simple configuration, and accurately engages the gripping side engagement portion of the plate cylinder with the gripping side end of the new printing plate, and The grip side end of the old printing plate can be easily detached from the grip side engaging portion.

According to a fourth aspect of the present invention, there is provided a method for replacing a printing plate according to the present invention, comprising removing an old printing plate attached to a plate cylinder of a printing press.
In the plate replacement method for mounting a new printing plate on the plate cylinder, when mounting the new printing plate on the plate cylinder, the new printing plate is held by the new printing plate holding member and the new printing plate holding member is moved to the plate cylinder. Move while guiding along the holding side engaging part provided in the
The grip side end of the new printing plate is engaged with the grip side engaging portion.

According to a fifth aspect of the present invention, there is provided a method for replacing a printing plate according to the present invention, comprising removing an old printing plate attached to a plate cylinder of a printing press.
In the plate replacement method of mounting a new printing plate on the plate cylinder, when removing the old printing plate from the plate cylinder, the vicinity of the edge of the old printing plate on the grip side is held by the old printing plate holding mechanism, It is characterized in that the holding mechanism is moved while guiding it along the gripping side engaging portion provided on the plate cylinder, and the gripping side end of the old printing plate is detached from the gripping side engaging portion.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a printing plate changing apparatus and a printing plate changing method according to the present invention will be described below with reference to the drawings. FIG. 1 is a schematic front view showing a printing press provided with a printing plate changing device according to the present invention, and FIG.
FIG. 2 is a schematic configuration diagram of a printing plate changing device included in the printing press shown in FIG. The printing unit 1 provided in the printing press P includes an operation-side frame 2, a drive-side frame 3, and a side frame 4, which are erected vertically with respect to the installation surface 1 </ b> A.
And a rail member 5 above each frame 2-4.
Is arranged.

Between the operation side frame 2 and the drive side frame 3, there is provided a printing plate 15 on which characters, pictures, etc. to be printed are printed.
A plate cylinder 8 on which a new printing plate 15A and an old printing plate 15B (to be described later) are mounted is disposed. The plate cylinder 8 is formed in a cylindrical shape, and on its outer periphery, as shown in FIG. 3, a gripping side engaging portion 9 which is a concave portion extending in the axial direction of the plate cylinder 8 is formed. The center side of the gripping side engaging portion 9 is
It has a substantially semicircular cross-sectional shape, and is provided with two claw-shaped engaging portions 9a and 9b on the outer peripheral side. The two claw-shaped engaging portions 9a and 9b face each other via the printing plate passing portion 10, and
Engagement surfaces 11a and 11b are formed on the side of the printing plate passing portion 10 of the claw-shaped engagement portions 9a and 9b, respectively. Further, a printing plate mounting member 14 having a claw portion 13 is fitted into the space 12 of the holding side engaging portion 9. When the printing plate mounting member 14 is mounted on the plate cylinder 8, the grip side end 16 of the printing plate 15 is engaged with the engagement surface 11 a, and the anti grip side end 17 is in contact with the claw portion 13 of the printing plate mounting member 14. Engage.

As shown in FIG. 2, the printing unit 1 is provided near the plate cylinder 8 and includes a blanket cylinder 19 for transferring characters, pictures, and the like onto a sheet 18. At both ends of the blanket cylinder 19, a support shaft 20 (see FIG. 1)
Is attached. The support shaft 20 is held by the operation-side frame 2 and the drive-side frame 3, respectively. In the vicinity of the blanket cylinder 19, the printing plate 15 is moved toward the plate cylinder 8 by the plate pressing roller moving mechanism 21,
The plate pressing roller 22 for pressing the plate is provided. Here, the plate cylinder 8, blanket cylinder 19, plate press roller 2
2 is substantially symmetrical with respect to the paper 18,
The description of the lower member in FIG.

The rail member 5 supported by each of the frames 2 to 4 is provided with a movable frame 6 which can move between a standby position indicated by a dashed line and an exchange position indicated by a solid line in FIG. Have been. A printing plate changing device 7 is rotatably attached to the moving frame 6. As shown in FIG. 2, the printing plate changing device 7 is rotated such that the longitudinal direction thereof coincides with the longitudinal direction of the moving frame 6 when not in use. Also, as shown in FIG.
During use, is rotated by a rotating mechanism (not shown) so as to form a predetermined angle with the moving frame 6. As a result, the end of the printing plate changing device 7 faces the gripping side engaging portion 9 of the plate cylinder 8, and the mounting or removal of the printing plate 15 can be easily performed.

As shown in FIG. 5, an inner frame 23 included in the plate changing device 7 is provided with an old plate removing mechanism 24 and a new plate mounting mechanism 25. The old printing plate removing mechanism 24 causes the old printing plate holding member 26 that holds the vicinity of the holding side end 16 of the old printing plate 15B indicated by a two-dot chain line in FIG. Have. The lower part of the old printing plate holding member 26 is fixed to the rotating member 28. The end of the turning member 28 is rotatably supported by a bracket member 30, and one end of a spring 29 is attached to the lower end of the turning member 28. The other end of the spring 29 is fixed to the bracket member 30.

The rotating member 28 is moved by a spring 29 in the drawing.
While being urged clockwise, the rotation range is regulated by a stopper (not shown). For this reason, the old printing plate holding member 26 attached to the rotating member 28
It is freely rotatable with respect to the bracket member 30 within the rotation range of the rotation member 28. On the lower surface of the bracket member 30, a vertical guide 27 (see FIG. 10) is fixed.
The vertical guide 27 is held by a vertical guide holding member 31 formed in a substantially cylindrical shape so as to be able to expand and contract. A support member 32 is attached to a lower portion of the vertical guide holding member 31.

A vertical moving mechanism 33 composed of a fluid cylinder is disposed between the support member 32 and the lower portion of the bracket member 30. The rod 36 of the vertical moving mechanism 33 (FIG. 1)
0) is fixed to the bracket member 30. Thus, if the vertical movement mechanism 33 is expanded and contracted, the old printing plate holding member 26 can be moved up and down in a direction substantially orthogonal to the longitudinal direction of the inner frame 23.

A longitudinal movement mechanism 34 composed of a fluid cylinder is connected to a side portion of the vertical guide holding member 31 via a connection portion. The other end of the longitudinal movement mechanism 34 is connected to a lower center portion of the inner frame 23. Are connected through the unit. FIG.
As shown in FIG.
Guide 35 for guiding the inner frame 23 along the longitudinal direction of the inner frame 23
Is provided. Thereby, the vertical guide holding member 3
1 is a front-rear guide 35 when the front-rear movement mechanism 34 is operated.
And moves along the longitudinal direction of the inner frame 23.
Therefore, the bracket member 30 is attached to the vertical guide holding member 31.
The old printing plate holding member 26 attached via the rotating member 28 also moves along the longitudinal direction of the inner frame 23.

At the approximate center of the inner frame 23, an old printing plate guide 38 is rotatably mounted via a hinge 37. The old printing plate 15B is moved to the plate cylinder 8 by the old printing plate removal mechanism 24.
5 (see the two-dot chain line in FIG. 5), the old printing plate guide 38 presses above the old printing plate 15B and stores the old printing plate 15B in the old printing plate pocket 39.

On the other hand, the new printing plate mounting mechanism 25
A new printing plate holding member 40 that holds A, and a new printing plate feeding mechanism 41 that includes a fluid cylinder or the like and moves the new printing plate holding member 40 in the longitudinal direction of the inner frame 23 along a parallel movement guide (not shown). Have. The new printing plate 15A is a printing plate exchange device 7
When the (inner frame 23) is rotated by a predetermined angle with respect to the moving frame 6, the gripper end 16 and the gripper engaging portion 9
Is held by the new printing plate holding member 40 in a state of being substantially parallel to the engagement surface 11a.

As shown in FIG. 6, the printing plate changing device 7 includes an outer frame 42 rotatably supported by the moving frame 6, an inner frame 43 slidably supported by the outer frame 42, Middle frame 43
And a middle frame front-rear movement mechanism 44 composed of a fluid cylinder having one end connected to the outer frame 42 and the other end connected to the middle frame 43 via a connection portion. .
As shown in FIG. 7, two inner frame guide members 45 are fixed to the inside of the side surface of the middle frame 43. Two rail members 46, 46 are fixed to the outer side surface of the inner frame 23. The inner frame guide member 45 and the rail member 46 are engaged with each other to form a guide means 47.
When the inner frame 23 is rotated by a predetermined angle with respect to the moving frame 6 in order to use the printing plate changing device 7, the longitudinal direction of the rail member 46 is changed to the holding side engaging portion formed on the plate cylinder 8. 9 are set substantially parallel to the engagement surface 11a.

As shown in FIG. 7, a moving mechanism 53 including a motor 50 is attached to a side end of the middle frame 43. A pinion gear 51 is attached to a shaft end of the motor 50, and a rack 52 is attached to a side end of the inner frame 23.
Are attached so as to be parallel to the longitudinal direction of the rail member 46 and to mesh with the pinion gear 51. Since the rack 52 and the pinion gear 51 are engaged with each other, when the motor 50 is operated, the inner frame 23 is moved by the moving mechanism 53 along the longitudinal direction of the inner frame guide member 45 and the rail member 46 with respect to the middle frame 43. That is, it moves while being guided by the guiding means 47.

Next, the old printing plate 15B mounted on the plate cylinder 8 is removed using the old printing plate removing mechanism 24 and the new printing plate mounting mechanism 25, and the new printing plate 15A is mounted on the plate cylinder 8. The procedure will be described. First, as shown in FIG. 1, the moving frame 6 at the standby position shown by the dashed line is moved to the exchange position shown by the solid line. Next, the printing plate changing device 7 is rotated with respect to the moving frame 6 so that the end of the printing plate changing device 7 and the plate cylinder 8 face each other (see FIG. 4). Then, the middle frame front-rear movement mechanism 44 (see FIG. 6) which is a fluid cylinder is operated,
As shown in FIG. 8, the end of the inner frame 23 and the plate cylinder 8 are brought close to each other. Further, the plate cylinder 8 is rotated so that the end of the inner frame 23 faces the grip side engaging portion 9. Further, the plate holding roller moving mechanism 21 is operated to move the plate holding roller 22 to the plate cylinder 8.
And press it against the gripping side engaging portion 9.

As shown in FIG. 9, the old printing plate guide 38 is
The moving mechanism (not shown) rotates the state shown by the two-dot chain line through the hinge 37 to the state shown by the solid line. This allows
The old printing plate guide 38 is for the old printing plate 1 removed from the plate cylinder 8.
5B guide. Next, when the printing plate mounting member 14 (see FIG. 3) fitted into the plate cylinder 8 is loosened, the old printing plate 1 which is an elastic body wound around the plate cylinder 8 and having a restoring force stored therein.
As 5B is restored, the opposite gripping end 17 of the old printing plate 15B is detached from the claw portion 13 of the printing plate mounting member 14.

With the end 17 on the side opposite to the gripper separated from the claw 13, the plate cylinder 8 is rotated counterclockwise as shown in FIG. As a result, the opposite gripping end portion 17 of the old printing plate 15B approaches and is guided by the old printing plate guide 38.
When the plate cylinder 8 makes one rotation counterclockwise, the old printing plate 1
5B is guided to the old printing plate pocket 39 (see FIG. 5) while being guided by the old printing plate guide 38.

In this state, the forward / backward moving mechanism 34 composed of a fluid cylinder is operated to move the vertical guide holding member 31 along the front / back guide 35, that is, in the longitudinal direction of the inner frame 23. Further, the vertical movement mechanism 33 composed of a fluid cylinder is operated to extend the rod 36 and bring the old printing plate holding member 26 closer to the old printing plate 15B. By further extending the rod 36, the old printing plate holding member 26 is brought into contact with the vicinity of the holding side end 16 of the plate cylinder 8, and a suction force is applied to a suction device (not shown) of the old printing plate holding member 26. Thus, the old printing plate holding member 26 is attracted to the vicinity of the grip side end 16 as shown in FIG.

At this time, a spring 29 having one end attached to the lower end of the tip of the rotating member 28 and the other end fixed to the bracket member 30 is compressed, and the old printing plate holding member 26 is compressed.
Rotates slightly counterclockwise. The displacement of the relative position between the plate cylinder 8 and the old printing plate removing mechanism 24 due to the rotation is such that there is no influence when the old printing plate 15B is removed from the plate cylinder 8. Then, the plate holding roller moving mechanism 21 is operated, and the plate holding roller 22 that has pressed the old printing plate 15B is released from the plate cylinder 8.

Next, when the motor 50 of the moving mechanism 53 is operated, the inner frame 23 provided with the old printing plate removing mechanism 24 is provided.
Is guided by a guide means 47 composed of an inner frame guide member 45 and a rail member 46 with respect to the middle frame 43,
In FIG. 10, the robot moves (downs) from the position indicated by the solid line to the position indicated by the two-dot chain line. At this time, the longitudinal directions of the inner frame guide member 45 and the rail member 46 are substantially parallel to the engaging surface 11a of the grip side engaging portion 9. Therefore, the old printing plate holding member 26 sucked in the vicinity of the gripping end 16 of the old printing plate 15B descends while being guided in the direction C along the engaging surface 11a of the gripping side engaging portion 9, and the old printing plate 15B The plate 15B is separated from the plate cylinder 8 in the direction C.

Further, as shown in FIG. 5, the rod 36 of the up-down movement mechanism 33 and the back-and-forth movement mechanism 34 are moved in a state where the old printing plate holding member 26 is attracted to the vicinity of the holding end 16 of the old printing plate 15B. Shrink the old printing plate 15B to the old printing plate pocket 3
9, and the old printing plate guide 38 is moved from a position shown by a solid line to a position shown by a dashed line by a moving mechanism (not shown) (see FIG. 9).

On the other hand, a new printing plate 15 to be newly mounted on the plate cylinder 8
A is held by the new printing plate holding member 40 in advance. At this time, as shown in FIG. 11, the new printing plate 15 </ b> A is configured such that the grip side end 16 is substantially parallel to the direction C along the engagement surface 11 a of the grip side engagement portion 9 of the plate cylinder 8. New printing plate holding member 40
Is held in. Further, the new printing plate feeding mechanism 41 is operated to move the new printing plate holding member 40 along a parallel movement guide (not shown), that is, along the longitudinal direction of the inner frame 23. At this time, the edge 16 on the grip side of the new printing plate 15A
While approaching the gripping side engaging portion 9 of the plate cylinder 8, the engaging surface 1 of the gripping side engaging portion 9 is controlled by a feeding control mechanism (not shown).
It moves to the extension of 1a (see the dotted line C in FIG. 11).

Next, as shown in FIG.
When the motor 50 is operated, the inner frame 23 in which the new printing plate mounting mechanism 25 is provided moves the inner frame 43 with the guiding means 4 comprising an inner frame guide member 45 and a rail member 46.
While being guided by 7, it moves from the position shown by the solid line to the position shown by the two-dot chain line. At this time, the inner frame guide member 45
In addition, since the longitudinal direction of the rail member 46 is substantially parallel to the engaging surface 11a of the gripping side engaging portion 9, the new printing plate 15A
Is held by the gripping side engaging portion 9.
Is guided in the direction C along the engaging surface 11a, and the new printing plate 15A is caused to approach the plate cylinder 8 in the direction C. That is, the edge 16 on the grip side of the new printing plate 15A moves from the position indicated by the solid line to the position indicated by the two-dot chain line.

For this reason, the edge 1 on the grip side of the new printing plate 15A.
6 and the engaging surface 11a of the gripping side engaging portion 9 are engaged with each other without a positional shift (see FIG. 12A) or a gap (see FIG. 12B). In this state, the plate holding roller moving mechanism 21 is operated, and the new printing plate 15 </ b> A engaged with the engagement surface 11 a of the gripping side engagement portion 9 is pressed by the plate holding roller 22. Next, the plate cylinder 8 is rotated clockwise, and the new printing plate 15A is wound around the outer periphery of the plate cylinder 8.
Further, by rotating the plate cylinder 8 once, the gripping side engaging portion 9 of the plate cylinder 8 is returned to the original position, and the opposite gripping side end 17 of the new printing plate 15A is brought into the claw portion of the printing plate mounting member 14. 13 (see FIG. 3). Then, the plate cylinder 8 is clamped by the printing plate mounting member 14, and the new printing plate 15A is mounted on the plate cylinder 8.

As shown in FIG. 5, the new printing plate feeding mechanism 41 is operated to move the new printing plate holding member 40 along a parallel movement guide (not shown), that is, along the longitudinal direction of the inner frame 23. Move and return to the original position. And the moving mechanism 5
The motor 50 of No. 3 is rotated in the reverse direction to move (up) the inner frame 23 from the position indicated by the two-dot chain line in FIG. 11 to the position indicated by the solid line. Further, the middle frame front-rear movement mechanism 44 (see FIG. 4), which is a fluid cylinder, is operated to separate the end of the inner frame 23 from the plate cylinder 8. Further, the plate changing device 7 is rotated with respect to the moving frame 6 so that the longitudinal direction of the plate changing device 7 and the longitudinal direction of the moving frame 6 match (see FIG. 2). Then, as shown in FIG. 1, the moving frame 6 at the exchange position shown by the solid line is moved to the standby position shown by the dashed line. By using the old printing plate removing mechanism 24 and the new printing plate mounting mechanism 25 according to the above-described procedure, the old printing plate 15B mounted on the plate cylinder 8 can be easily removed, and the new printing plate 15A can be attached to the plate cylinder 8. It can be mounted accurately without causing displacement or gap.

[0042]

Since the present invention is configured as described above, it has the following effects. That is, by moving the grip side end of the old printing plate in the direction along the engagement surface of the grip side engagement portion of the plate cylinder by the guide means and the moving mechanism having a relatively simple configuration, the old printing plate is moved. The printing plate can be easily detached from the plate cylinder. In addition, the gripping end of the new printing plate also moves toward the plate cylinder while being guided by the moving mechanism and the guide means in the direction along the engagement surface of the gripping engagement portion, and the new printing plate and the new printing plate are moved together. The plate cylinder can be accurately engaged with the plate cylinder without causing a displacement or a gap.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a printing press provided with a printing plate changing device according to the present invention.

FIG. 2 is a schematic side view of a printing plate changing device included in the printing press shown in FIG. 1 when viewed from the side.

FIG. 3 is an enlarged view of a main part showing a gripping side engaging portion of the plate cylinder.

FIG. 4 is a diagram showing a rotating state of the printing plate changing device.

FIG. 5 is a configuration diagram showing an old plate removing mechanism and a new plate mounting mechanism provided on an inner frame plate of the plate replacing device.

6 is an enlarged view of a printing plate changing device attached to the moving frame shown in FIG.

FIG. 7 is a view taken in the direction of the arrow Y in FIG. 6;

FIG. 8 is a diagram illustrating a standby state when the printing plate changing device removes an old printing plate.

FIG. 9 is an enlarged view of a main part of FIG. 8;

FIG. 10 is a diagram showing a state in which the old printing plate removing mechanism and the inner frame plate are operated when the old printing plate is removed from the plate cylinder.

FIG. 11 is a diagram showing a new printing plate mounting mechanism when the new printing plate is mounted on the plate cylinder.

12A is a diagram illustrating a case where the grip side end does not engage with the engagement surface of the grip side engagement portion and comes into contact with the peripheral surface of the plate cylinder, and FIG. 12B illustrates the grip side; It is a figure which shows the state which has a clearance gap between an end part and the engagement surface of a grip side engagement part, (c) is a figure which shows.
It is a figure which shows the case where a plate cylinder and a bracket cylinder are rotated in the state shown to (b).

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Printing unit, 6 ... Moving frame, 7 ... Plate exchange device, 8 ... Plate cylinder, 9 ... Holding side engaging part, 11a ... Engaging surface,
15A: New printing plate, 15B: Old printing plate, 16: Edge on the side of the grip, 17: End on the side of the edge, 19: Blanket cylinder, 2
DESCRIPTION OF SYMBOLS 1 ... Plate holding roller moving mechanism, 22 ... Plate holding roller, 23
... inner frame, 24 ... old printing plate removal mechanism, 25 ... new printing plate mounting mechanism, 26 ... old printing plate holding member, 31 ... vertical guide holding member, 34 ... front-back movement mechanism, 35 ... front-back guide, 36 ... rod, 40: new printing plate holding member, 41: new printing plate feeding mechanism,
42 ... outer frame, 43 ... middle frame, 44 ... middle frame plate back and forth moving mechanism,
45 ... inner frame guide member, 46 ... rail member, 47 ... guide means, 50 ... motor, 51 ... pinion, 52 ... rack,
53: moving mechanism, C: engaging surface direction, P: printing machine.

Claims (5)

[Claims] 1. A printing plate changing apparatus comprising: an old printing plate removing mechanism for removing an old printing plate attached to a plate cylinder of a printing press; and a new printing plate mounting mechanism for mounting a new printing plate on the plate cylinder. The plate cylinder is provided with a gripping side engaging portion that engages with gripping side ends of the old printing plate and the new printing plate, and the new printing plate mounting mechanism includes a new printing plate holding the new printing plate. A plate holding member, a moving mechanism for moving the new printing plate holding member with respect to the plate cylinder, and the new printing plate holding member moved by the moving mechanism, along the grip side engaging portion. And a guide means for guiding the plate to move. 2. A printing plate changing apparatus comprising: an old printing plate removing mechanism for removing an old printing plate attached to a plate cylinder of a printing press; and a new printing plate mounting mechanism for mounting a new printing plate on the plate cylinder. The plate cylinder is provided with a holding side engaging portion that engages with a holding side end of the old printing plate and the new printing plate, and the old printing plate removing mechanism includes a holding side end of the old printing plate. An old printing plate holding mechanism for holding the vicinity, a moving mechanism for moving the old printing plate holding mechanism with respect to the plate cylinder, and the old printing plate holding mechanism moved by the moving mechanism; And a guide means for guiding the plate to move along the engaging portion. 3. A printing plate changing apparatus comprising: an old printing plate removing mechanism for removing an old printing plate attached to a plate cylinder of a printing press; and a new printing plate mounting mechanism for mounting a new printing plate on the plate cylinder. The plate cylinder is provided with a gripping side engaging portion that engages with gripping side ends of the old printing plate and the new printing plate, and the new printing plate mounting mechanism includes a new printing plate holding the new printing plate. It has a plate holding member and is arranged on the frame, and the old printing plate removing mechanism has an old printing plate holding mechanism for holding the vicinity of the grip side end of the old printing plate, and is disposed on the frame. A moving mechanism for moving the frame with respect to the plate cylinder, and guide means for guiding the frame moved by the moving mechanism to move along the grip side engaging portion. A printing plate changing device. 4. A printing plate replacing method for removing an old printing plate attached to a plate cylinder of a printing press and mounting a new printing plate on the plate cylinder, wherein when the new printing plate is mounted on the plate cylinder, The new printing plate is held by a new printing plate holding member, and the new printing plate holding member is moved while guiding the new printing plate holding member along a gripping side engaging portion provided on the plate cylinder; A method for replacing a printing plate, comprising: engaging a grip side end of the grip with the grip side engaging portion. 5. A plate replacement method for removing an old printing plate attached to a plate cylinder of a printing press and mounting a new printing plate on the plate cylinder, wherein when the old printing plate is removed from the plate cylinder, The old printing plate holding mechanism is held near the grip side end of the old printing plate, and the old printing plate holding mechanism is moved while guiding the old printing plate holding mechanism along the grip side engaging portion provided on the plate cylinder. And a method of replacing the plate side of the old printing plate by disengaging the grip side end of the old printing plate from the grip side engagement portion.