JP2000094643A - Plate replacing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a plate replacing apparatus for smoothly feeding a plate out of an apparatus by effectively removing a gripper end of the plate from a gap of a plate cylinder. SOLUTION: The plate replacing apparatus comprise a guide plate 13 communicating with a gap 11a of a plate cylinder 111 to guide a plate 110 in a discharging direction, a turning plate 23 and a guide roller 19 provided at the plate 13 to move a passage route of the plate 110 to draw a gripper end 110a of the plate 110 from the gap 111a of the plate 111, and a rotary plate 24 and a spring 25 or the like rotatably provided at an end of the plate 13 to guide the gripper end 110a of the plate 110 in a discharging direction without interfering with the plate 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate exchanging device for exchanging plates of a plate cylinder of a printing press.

[0002]

2. Description of the Related Art A conventional plate changing device for changing a plate of a plate cylinder of a printing press is disclosed in, for example, Japanese Patent Application Laid-Open No. 7-290688. As shown in FIG. 6, the plate changing device presses the plate 130 wound around the plate cylinder 131 with the pressing roller 71 while holding the plate 130 at the edge 13 of the plate 130.
0b is removed from the gap 131a of the plate cylinder 131 (FIG. 6).
(See (a)), the plate cylinder 131 is rotated, and the plate 130 is sent out from the plate cylinder 131 onto the guide 72 (FIG. 6).
(See (b)), the holding edge 130a of the plate 130 is
When the plate 130 is removed from the gap 131a, the plate 130 is sucked and held by the suction holding device 73 (see FIG. 6C), and the plate 130 is further sent out by the suction holding device.
The plate 130 is detached from the plate cylinder 131. In FIG. 6, 132 is a blanket cylinder.

[0003]

When the plate 130 is removed from the plate cylinder 131 as described above, the grip end 130a of the plate 130 is bent at an acute angle.
Not only is it difficult for the plate 30a to come off the gap 131a of the plate cylinder 131, but also it was difficult to smoothly feed the plate 130 out of the machine.

Therefore, the gap 131a of the plate cylinder 131
From the plate 130, remove the edge 130a.
There has been a strong demand for a plate changing device capable of smoothly sending the plate 130 out of the machine.

[0005]

According to the present invention, there is provided a plate exchanging apparatus which is provided with a plate guide for guiding a plate discharged from a plate cylinder and which is provided so as to be capable of moving forward and backward. Plate extracting means for extracting the plate bending portion of the plate from the gap of the plate cylinder, rotatably provided in the vicinity of the plate extracting means, and rotating with the engagement of the plate bending portion of the plate. Plate bending portion guiding means for guiding the plate bending portion of the plate in the discharge direction.

[0006] In the above-described plate exchanging apparatus, the plate bending portion guiding means is provided in the plate extracting means.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which a plate exchanging apparatus according to the present invention is applied to a two-sided printing machine will be described with reference to FIGS. 1 is a schematic configuration diagram of a main part member on an upper side of the rotary printing press, FIG. 2 is a schematic configuration diagram of a main part member on a lower side of the rotary printing press, and FIG. FIG. 4
FIG. 3 is a configuration diagram of a revolving plate.

As shown in FIG. 1, a blanket cylinder 112 is in contact with a plate cylinder 111 on which the plate 110 is mounted. On the other hand, as shown in FIG. 2, a blanket cylinder 122 is in contact with a plate cylinder 121 on which the plate 120 is mounted. Blanket cylinder 11
The lower side of 2 and the upper side of blanket cylinder 122 are in contact with each other, and a web or the like passes between blanket cylinders 112 and 122.

That is, the plates 110, 121 of the plate cylinders 111, 121
When ink is supplied from an ink supply device (not shown) to the plate 120, the ink corresponding to the pattern on the plates 110 and 120 is transferred to the blanket cylinders 112 and 122, respectively, and the picture is printed on both sides of a web or the like passing between the blanket cylinders 112 and 122. Can be printed.

As shown in FIGS. 1 and 2, plate cylinders 111, 12
1 is a holding edge 1 which is a plate bending portion of the plates 110 and 120.
Gap 111a and 121a which hold 10a, 120a and holding buttocks 110b, 120b are provided, respectively. The plate cylinders 111, 121 have the plate cylinders 111, 121, respectively.
Press roller 2 for pressing plates 110 and 120 against 121
6, 46 are in contact with each other. In the vicinity of the plate cylinder 111, a fixed type guide plate 10 for guiding the plate 110 from the upper surface to the plate cylinder 111 is provided. Plate cylinder 121
Is provided with a fixed type guide plate 30 for guiding the passage of the plate 120 from below.

As shown in FIG. 2, a support arm 51 for temporarily supporting the plate 120 is provided in the vicinity of the guide plate 30, and the support arm 51 is moved to a set position (not shown) by driving means (not shown). Position) and the retracted position, and can be stored so as not to disturb the work when not needed.

On the other hand, as shown in FIGS.
, A support shaft 31 is rotatably supported so as to face the longitudinal direction along the axial direction of the plate cylinder 121. A support bracket 32 is provided at one end of the support shaft 31.
Is fitted and fixed, and a support bracket is attached to the other end of the support shaft 31 in the same manner as the support bracket 32. These support brackets 32
Supports a guide plate 33, which is a plate guide for guiding the passage of the plate 120 from above, from the back. At the other end of the support bracket 32, the rod 3 of the air cylinder 34
The leading end of 4a is rotatably connected. The base end of the air cylinder 34 is rotatably connected to and supported by the frame.

That is, when the rod 34a of the air cylinder 34 is extended, the guide plate 33 is set so as to face the guide plate 30 and guide the passage of the plate 120 (advance position). 34
When “a” is contracted, it separates from the guide plate 30 and retreats from the passage of the plate 120 (retreat position).

A guide roller 35 for smoothing the passage of the printing plate 120 is provided at the tip of the guide plate 33 which swings.
Is provided. On both sides of the guide plate 33,
A contact plate 36 that regulates the displacement of the plate 120 in the width direction is provided upright. Near the front end of the back of the guide plate 33,
The support shaft 37 is rotatably supported so that the support shaft 37 is oriented along the axis of the support shaft 31. Support shaft 3
One end of a support bracket 38 is fitted and fixed to 7. A guide roller 39 is supported on the other end of the support bracket 38 so as to be rotatable around an axis along the axial direction of the support shaft 37.
The hole 33a formed in the guide plate 33 allows the guide plate 33 to protrude from the back side to the front side as the support shaft 37 rotates.

A middle portion of a support bracket 40 is connected and fixed to the widthwise outer end of the guide plate 33 of the support shaft 37. An end of a rod 41a of an air cylinder 41 is rotatably connected to the support bracket 40 near the support shaft 31 side. The base end of the air cylinder 41
The guide plate 33 is rotatably connected and supported by a support bracket 42 provided near the support shaft.

That is, the rod 41a of the air cylinder 41
Is contracted, the support shaft 37 is rotated via the support bracket 40 so that the guide roller 39 is protruded (extended) to the front side (advance position) of the guide plate 33 via the support bracket 38, and the rod of the air cylinder 41 is rotated. When the extension 41a is extended, the support shaft 37 is rotated via the support bracket 40 so that the guide roller 39 is retracted (retracted) to the rear side (retreat position) of the guide plate 33 via the support bracket 38.

As shown in FIGS.
The legs 43a of the substantially U-shaped revolving plate 43 are connected and fixed to the distal end side of the zero guide plate 33 so as to have legs 43b at both ends of the main body 43a.

That is, when the rod 41a of the air cylinder 41 is extended, the swivel plate 43 is positioned on the front side (withdrawal) of the guide plate 33 so that the main body 43a is parallel to the guide plate 33 at a predetermined interval. position)
When the rod 41a of the air cylinder 41 is contracted, the main body 43a pivots (extends) so as to move to the rear side (advance position) of the guide plate 33.

At the leading end of the turning plate 43 in the turning direction of the main body portion 43a to the advanced position, a turning plate 44 which can turn around the axis in the same direction as the axis of the support shaft 27 is provided. The rotation plate 44 is provided along the longitudinal direction of the rotation plate 44. The rotation plate 44 is not rotatable in the same rotation direction as the rotation direction of the rotation plate 43 from the advanced position to the retracted position. ) Is set, and the spring 45 returns to the initial position when the turning plate 43 is turned in the same direction as the turning direction from the retracted position to the advanced position.
It is energized by.

As shown in FIG. 1, in the vicinity of the plate cylinder 111, a support shaft 11 is rotatably supported so that the support shaft 11 is directed in the longitudinal direction along the axial direction of the plate cylinder 111. A support bracket 12 similar to the support bracket 32 is fixed to the support shaft 11. The support bracket 12 supports a guide plate 13, which is a plate guide for guiding the plate 110 to the plate cylinder 111 from the lower surface, from the back. are doing. The air cylinder 34 is provided on the support bracket 12.
The distal end side of a rod 14a of an air cylinder 14 similar to the above is rotatably connected.

That is, similarly to the case of the guide plate 33, the guide plate 13 is set so as to guide the passage of the plate 110 facing the guide plate 10 by extending the rod 14a of the air cylinder 14. Then, when the rod 14a of the air cylinder 14 is contracted, the rod 14a is separated from the guide plate 10 and retreats from the passage of the plate 110 (retreat position).

The guide plate 13 is provided with a guide roller 35 and a backing plate 16 similar to the guide roller 35 and the backing plate 36. Further, the guide plate 13 is provided with a support shaft 17, a support bracket 18, and a guide roller 19 similar to the support shaft 37, the support bracket 38, and the guide roller 39, and the guide roller 19 is as described above. Guide roller 3
As in the case of No. 9, the guide plate 13 can protrude from the back side to the front side.

The tip of a rod 21a of an air cylinder 21 similar to the air cylinder 41 is rotatably connected to the support shaft 17 via a support bracket 20 similar to the support bracket 40. The base end of the air cylinder 21 is rotatably connected to and supported by a support bracket 22 provided on the guide plate 13 similarly to the support bracket 42.

That is, similarly to the case of the guide roller 39, the guide roller 19 projects (extends) to the front side (advance position) of the guide plate 13 due to the contraction of the rod 21a of the air cylinder 21. By the extension of the rod 21a, the rod 21a enters (retreats) on the rear side (retreat position) of the guide plate 13.

Further, a swivel plate 23 similar to the swivel plate 43 is connected and fixed to the support bracket 18, and the swivel plate 23 is, like the swivel plate 43, a rod 21a of the air cylinder 21.
Is extended, the main body 23a is located on the front side (retreat position) of the guide plate 13 so as to be parallel to the guide plate 13 at a predetermined interval, and the rod 21a of the air cylinder 21 is contracted. Then, the main body 23a is turned (advanced) so as to move to the rear side (advance position) of the guide plate 13.

The rotating plate 23 is provided with the rotating plate 4
Rotating plate 24 and spring 2 similar to 4 and spring 45
5 is provided, and the rotating plate 24 is provided with the rotating plate 4.
As in the case of No. 4, in the rotation in the same direction as the turning direction of the swivel plate 23 from the advanced position to the retracted position, a limit position (initial position) at which the swivel plate 23 cannot be rotated is set. The spring 2 is configured to return to the initial position in the rotation in the same direction as the turning direction to the advanced position.
5 is energized.

In this embodiment, the support shafts 17, 3
7, support brackets 18, 38, guide rollers 19, 3
9, support brackets 20, 40, air cylinders 21, 4
1, support brackets 22, 42, revolving plates 23, 4
3 and the like constitute a plate extracting means.
42, springs 25 and 45, etc., constitute a plate bending portion guiding means.

The removal of a plate using the plate exchange device having such a configuration will be described with reference to FIG. FIG.
FIG. However, the operation is the same between the plate cylinder 111 side and the plate cylinder 121 side, except for the difference in the direction. Therefore, the plate cylinder 111 side will be described, and the description of the plate cylinder 121 side will be omitted.

First, the rod 14a of the air cylinder 14 is extended to move the guide plate 13 to the advanced position so as to face the guide plate 10, and the rod 21a of the air cylinder 21 is extended to
Is immersed in the rear side of the guide plate 13 and at the same time, the revolving plate 23 is set to the retracted position between the guide plates 10 and 13 (the state indicated by the solid line in FIG. 1).

Next, the grip 110b of the plate 110 is removed from the gap 111a of the plate cylinder 111, and the plate cylinder 111 is rotated while pressing the plate 110 with the pressing roller 26 to rotate the plate 110.
10 from the plate cylinder 111 to the main body 2 of the revolving plate 23.
It passes between 3a and the guide plate 13 and is sent out between the guide plates 10 and 13 (see FIG. 5A).

Thus, the plate cylinder 111 is sent out,
When the gap 11a of the plate cylinder 111 reaches the vicinity of the pressing roller 26, the pressing roller 26 is retracted so as to be separated from the plate cylinder 111, and when the rod 21a of the air cylinder 21 is contracted, the rotating plate 23 And the guide roller 19
Project from the back side of the guide plate 13 to form the plate 110.
The passage of the plate 110 is moved so that the grip end 110a is pulled out of the gap 111a of the plate cylinder 111 (see FIG. 5B).

In this manner, the edge 110 of the plate 110
a is extracted from the gap 111a of the plate cylinder 111,
By extending the rod 21 a of the air cylinder 21, the swivel plate 23 can move the gripping end 110 a of the plate 110 smoothly between the guide plate 10 and the guide plate 13 from between the main body 23 a of the swivel plate 23 and the guide plate 13. Is retracted to the retracted position (see FIG. 5C).

At this time, the plate 110 removed from the plate cylinder 111 is curved by the outer peripheral surface of the plate cylinder 111 as shown by a two-dot chain line in FIG. In addition, the holding end 110a of the plate 110 has the shape of the tip of the revolving plate 23, that is,
It gets caught on the rotating plate 24. However, the rotating plate 24 is pulled and rotated by this, and the plate 1 is rotated.
After guiding the gripping end 110a of the tenth in the discharge direction without interfering with the revolving plate 23, the spring returns to the initial position by the urging force of the spring 25. Thereby, the plate 110 is smoothly sent out.

Therefore, according to such a plate changing device, the grip ends 110a, 120a of the plates 110, 120 can be reliably removed from the gaps 111a, 121a of the plate cylinders 111, 121, and the plates 110, 120 can be removed. It can be sent out smoothly.

[0035]

According to the plate exchange device of the present invention, the grip end of the plate can be reliably removed from the gap of the plate cylinder, and the plate can be smoothly sent out of the machine.
It is possible to omit the labor for the operator to directly remove, to improve the working efficiency and to reduce the cost for the work.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an upper main part of an embodiment in which a plate changing device according to the present invention is applied to a duplex printing machine.

FIG. 2 is a schematic configuration diagram of a main part on a lower side of an embodiment when the plate exchanging device according to the present invention is applied to a two-sided printing press.

FIG. 3 is a development view of FIG. 2;

FIG. 4 is a configuration diagram of a revolving plate.

FIG. 5 is an operation explanatory view.

FIG. 6 is an explanatory diagram of an example of a conventional plate exchange device.

[Explanation of symbols]

 10, 30 Guide plate 11, 31 Support shaft 12, 32 Support bracket 13, 33 Guide plate 14, 34 Air cylinder 14a, 34a Rod 15, 35 Guide roller 16, 36 Backing plate 17, 37 Support shaft 18, 38 Support bracket 19 , 39 guide rollers 20, 40 support brackets 21, 41 air cylinders 21a, 41a rods 22, 42 support brackets 23, 43 revolving plates 23a, 43a body portions 23b, 43b legs 24, 44 rotating plates 25, 45 springs 26, 46 Press roller 51 Support arm 110 120 Plate 110a, 120a Holding edge 110b, 120b Holding butt 111, 121 Plate cylinder 111a, 121a Gap 112, 122 Rubber cylinder

Claims (2)

[Claims] 1. A plate guide for guiding a plate ejected from a plate cylinder, plate removing means provided so as to be able to advance and retreat, and extracting a plate bending portion of the plate from a gap of the plate cylinder by extending the plate guide; Plate bending portion guide means rotatably provided in the vicinity of the extracting means and rotating in accordance with engagement of the plate bending portion of the plate to guide the plate bending portion of the plate in the discharge direction. A plate exchange device characterized by comprising: 2. The plate changing device according to claim 1, wherein said plate bending portion guiding means is provided in said plate extracting means.