JPH11268243A - Plate bending apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply bend a gripper side and an opposite side to the gripper side of a press plate by one plate bending apparatus by individually specifying a rotating range of an arm supported to a base to rotate at a center of radius of curvature of a circular arc-like surface of the base as a center. SOLUTION: An engaging pin 15 is engaged with a guide groove 12a of one stopper plate 12 for a gripper side and an opposite side to the gripper side, and a press plate 100 is inserted between a base 1 and a retaining roller 9. An arm 2 is rotated, a locking pin 4 is inserted, a locking plate 6 is fixed to the arm 2, and the roller 9 is held in the state brought into contact with the base 1. Then, when a handle bar 3 is pulled down to rotate the arm, the roller 9 is rolled on a circular arc-like surface of the base 1 to bend the plate 100. At this time, as the arm 2 is rotated, the pin 15 slides in the groove 12a. When the pin 15 is brought into contact with an end of a screw 14, the arm 2 becomes impossible to rotate to stop a bending angle of the plate 100 in a predetermined size.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate bending apparatus for bending a plate side, which is mounted on a plate cylinder of a rotary printing press or the like, on a side and a bottom side.

[0002]

2. Description of the Related Art When a printing plate is mounted on a plate cylinder of a rotary printing press or the like, a plate bending device which bends a gripping side and a tail side of the printing plate to an appropriate angle is used. As such a plate bending apparatus, for example, one disclosed in Japanese Patent Publication No. 3-59827 is known. 3-598
The plate bending apparatus disclosed in Japanese Patent Publication No. 27 will be described with reference to FIGS.

[0003] As shown in FIG. 9, a hole 11 slightly longer than the width of the printing plate 100 is formed in a work side plate 111 a of a gantry 111.
1c is provided. A guide plate 11 that is inclined from the hole 11c toward the bottom plate 111b is provided inside the gantry 111.
2,113 are provided. The bracket 114 fixed to the bottom plate 111b inside the gantry 111 has the hole 1
A limit switch 115, which is inserted from 11c and slides down toward the bottom plate 111b by its own weight along the guide plates 112 and 113 and abuts on the leading end of the printing plate 100 to open contacts, is attached.

[0004] As shown in FIG.
On one side facing 0, a pair of upper and lower horizontal shafts 116 and 117 parallel to the surface of the printing plate 100 are supported between a pair of spring supports 118 fixed to the inner surfaces of both side plates of the gantry 111. On the other side facing the inserted printing plate 100, a plate bending bar 119 is provided with a long hole 118a of a spring support 118.
Slidably supported at both ends by the horizontal shaft 11
6, 117 are provided so as to be able to advance and retreat in the perspective direction with respect to the line connecting the axes.

[0005] A compression coil spring 120 is mounted between the spring receiver 118 and the end of the plate bending bar 119, and the spring 120 causes the plate bending bar 119 to move the plate bending bar 119 by its resilient force. , 117 are urged away from each other. A stay 121 having an L-shaped cross section integrally formed on the spring receiver 118 and supported between both side plates of the gantry 111 is provided with a piston by air from an air compressor (not shown) electrically connected to the limit switch 115. An air cylinder 122 for moving the rod 122a forward and backward is mounted. When the piston rod 122a is extended by air pressure, the air cylinder 122 pushes the plate bending bar 119 which engages with the working end of the air cylinder 122 to the elastic force of the compression coil spring 120. Horizontal axes 116 and 117 against
The printing plate 100 is bent in a V-shape according to the positional relationship between the shafts 116 and 117 and the bar 119 by moving the printing plate 100 toward the space therebetween.

[0006] Such a plate bending apparatus is used as follows. When the edge on the grip side or the edge on the tail side of the printing plate 100 is inserted from the hole 11c of the gantry 111, the printing plate 111
Is guided by the guide plates 112 and 113 under its own weight, and slides down, and the leading end contacts the contact point of the limit switch 115 through the space between the horizontal shafts 116 and 117 and the plate bending bar 119. As a result, the contact is opened and the air cylinder 122 electrically connected thereto is operated, and the piston rod 1
22a is extended and the plate bending bar 119 is compressed by the compression coil spring 1
It is moved in the direction of the horizontal axes 116 and 117 against the elastic force of 20.

The plate bending bar 119 has upper and lower horizontal axes 116,
When it moves to between 117, as shown by the chain line in FIG.
The printing plate 100 is moved by the plate bending bar 119 to the upper and lower horizontal axes 4.
Since the printing plate 100 is pressed by 8, 49, the printing plate 100 is bent in a V shape.

When the air from the air cylinder 122 is released, the piston rod 122
a is contracted while the plate bending bar 119 is moved to the horizontal axis 116,1.
17, the printing plate 100 is released from the holding, and the printing plate 100 can be taken out from the hole 111b.

[0009]

SUMMARY OF THE INVENTION However, the printing plate 100
Since the bending angle between the gripping side and the butt side is different, when the gripping side and the butt side of the printing plate 100 are bent using the conventional plate bending apparatus as described above, the operation of the piston rod 122a of the air cylinder 122 is performed. Stroke printing plate 100
Since it is necessary to change between the grip side and the tail side, the amount of air supply from the air compressor to the air cylinder 122 must be changed, which is very troublesome. Therefore, it is conceivable to prepare two plate bending devices, but this is not practical because it causes problems in installation space and cost.

[0010] In view of the above, an object of the present invention is to provide a plate bending apparatus which can easily bend the grip side and the tail side of a printing plate with one unit.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a plate bending apparatus according to the present invention has a base having an arcuate surface, and is rotatable about a center of a radius of curvature of the arcuate surface of the base. An arm supported by the base, a lock plate movably provided on the arm so as to be able to approach and separate from the base, a plate bending member supported by the lock plate, and the arc surface of the base. Fixing means for positioning and fixing the lock plate to the arm so as to clamp the plate with the plate bending member;
It is characterized by comprising a plurality of regulating means capable of individually defining the rotation range of the arm.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a plate bending apparatus according to the present invention will be described with reference to FIGS. 1 is a side view, FIG. 2 is a front view as viewed from the direction of arrow II in FIG. 1, FIG. 3 is a sectional view taken along line III-III in FIG. 1, and FIG.
5 is an enlarged sectional view of an arrow V part in FIG. 1, and FIG. 6 is an extracted sectional view of an arrow VI part in FIG. 5.

As shown in FIGS. 1 and 2, a cylindrical base 1 having an arc surface is supported at both ends at a side end of a step 101 provided on a side of a printing unit of a rotary printing press. I have. At both ends of the base 1, the base end of a substantially V-shaped arm 2 is supported so as to be rotatable around the center of the radius of curvature of the arc surface of the base 1. A handlebar 3 is attached to a distal end side between the arms 2.

As shown in FIG. 3, a hole 2a is formed in the middle of the arm 2. The lock pin 4 is fitted in the hole 2a of the arm 2 so as to be slidable in the axial direction. A predetermined length of a groove 4a is formed on the outer peripheral surface of the lock pin 4 along the axial direction. In the vicinity of the hole 2a on the outer surface of the arm 2, an engagement plate 5 that engages with the groove 4a of the lock pin 4 is attached.

That is, the lock pin 4 is slid by the engagement plate 5 which engages with the groove 4a so that the lock pin 4 can slide within the hole 2a without falling out of the hole 2a. Is regulated.

As shown in FIGS. 3 and 4, a lock plate 6 is supported near the base end on the inner side surface of the arm 2 so that the lock plate 6 is rotatable about a middle portion thereof by a shaft 7. The end of the base 1 can be moved toward and away from the base 1. On the lock pin 4 side of the lock plate 6, an engagement hole 6a into which the tip of the lock pin 4 can be inserted and removed is formed. As shown in FIGS. 1 to 3, a reinforcing beam 8 is attached to a portion between the lock plates 6 near the lock pin 4.

As shown in FIGS. 2 to 4, at the end of the base 1 between the lock plates 6, a pressing roller 9 serving as a plate bending member rotates around an axis parallel to the center of the radius of curvature of the arc surface of the base 1. When the lock pin 4 is fitted into the engagement hole 6 a of the lock plate 6 to fix the lock plate 6 to the arm 2, the holding roller 9 supports the base. The support position of the printing plate 100 is set so that the printing plate 100 can be clamped in contact with the first arc surface. A backup roller 10 is provided at a middle position between the lock plates 6 so as to abut on the pressing roller 9.

That is, the lock pin 4 is connected to the lock plate 6
The locking plate 6 is positioned and fixed to the arm 2 by fitting into the engaging hole 6a, so that the outer peripheral surface of the pressing roller 9 can be brought into contact with the arc surface of the base 1 and the arm 2 is rotated. By doing so, the pressing roller 9 can be rolled along the arc surface of the base 1 while being backed up by the backup roller 10. Such a lock pin 4 and an engagement plate 5
Thus, in the present embodiment, the fixing means is configured.

As shown in FIGS. 1, 2, 5, and 6, pins 11 protrude near the end of the base 1 in step 101, respectively. A washer 11 is provided on the tip end of the pin 11.
a is provided. The base end of the stopper plate 12 is fitted to the pin 11 such that the base end of the stopper plate 12 can slide along the axial direction of the pin 11 and can rotate along the circumferential direction of the pin 11. The pin 1
A compression coil spring 13 is fitted between the washer 11a and the stopper plate 12, and the stopper plate 12 is constantly urged so as to be pressed toward the step 101.

As shown in FIG. 5, the stopper plate 12
A guide groove 12a is formed along the longitudinal direction near the front end. A screw 14 is screwed into the tip of the stopper plate 12 so as to face the axial direction in the longitudinal direction of the stopper plate 12.
4 has a tip projecting into the guide groove 12a, and the length of the projection can be individually adjusted to a predetermined size. On the other hand, on the axis of the backup roller 10 of the arm 2, an engagement pin 15 is slidably inserted into the guide groove 12 a of the stopper plate 12.

That is, the stopper plate 12 is
By fitting the guide groove 12a of the stopper plate 12 into the engagement pin 15 while pulling it toward the washer 11a side, the compression coil spring 13 is moved so that the engagement pin 15 does not come off from the guide groove 12a of the stopper plate 12. The stopper plate 12 can be pressed against the arm 2 and the length of the screw 14 projecting into the groove 12a of the stopper plate 12 is adjusted, so that the engagement pin 15 in the guide groove 12a of the stopper plate 12 is adjusted.
Is defined, and the rotatable range of the arm 2 can be defined. In the present embodiment, the pin 11, the stopper plate 12, the compression coil spring 13, the screw 14, the engagement pin 15, and the like constitute a restricting means.

Also, as shown in FIGS.
A hook 16 for detachably engaging with the handle 3 and fixedly holding the arm 2 is provided below the stand 102 for supporting the arm 2.

The plate bending using such a plate bending apparatus will be described with reference to FIG. FIG. 7 is an explanatory diagram of the procedure.

The lock pin 4 is pushed into the hole 2a of the arm 2 to protrude its tip, and the hook 16 is removed from the handlebar 3 to rotate the arm 2 (FIG. 7).
(A)), the side end surface of the lock plate 6 comes into contact with the lock pin 4 and the rotation of the lock plate 6 with respect to the arm 2 is regulated.
The arm 2 can be rotated until it comes into contact with, and the arm 2 can be stopped in the contact state (see FIG. 7B).

Next, one of the stopper plates 1
2 is engaged with the engagement pin 15 on the corresponding side (see FIG. 7C), and the base 1 and the pressing roller 9 are engaged.
After inserting the printing plate 100 (see FIG. 7D),
The lock pin 4 is pulled out, the arm 2 is rotated so that the engagement hole 6a of the lock plate 6 and the hole 2a of the arm 2 coincide, and the lock pin 4 is inserted (see FIG. 7E). ), The lock plate 6 is fixed to the arm 2, and the holding roller 9 is held in contact with the base 1.

Subsequently, when the arm 2 is rotated so as to pull down the handlebar 3 (see FIG. 7F), the pressing roller 9 rolls on the arc surface of the base 1 and the printing plate 100 is bent. Can be

With the rotation of the arm 2, the engaging pin 15 relatively slides and moves in the guide groove 12 a of the stopper plate 12, and when the engaging pin 15 contacts the tip of the screw 14, the arm 2 cannot rotate, and the bending angle of the printing plate 100 can be stopped at a predetermined size.

For this reason, the rotation limit of the arm 2 is limited to the printing plate 10.
The protrusion length of the screw 14 of the stopper plate 12 on one side from the guide groove 12a is adjusted so that the bending angle on the grip side is zero, and the rotation limit of the arm 2 is set to
When the protrusion length of the screw 14 of the stopper plate 12 on the other side from the guide groove 12a is adjusted so as to have a bending angle on the rear side of 00, the bending side of the printing plate 100 is bent on one side. Guide groove 1 of stopper plate 12
2a is engaged with the engagement pin 15 on the corresponding side, and the above operation is performed to bend the trailing side of the printing plate 100. In this case, the guide groove 12a of the stopper plate 12 on the other side is engaged with the engagement pin 15 on the corresponding side. By performing the above-described operation while engaging with the printing plate 100, the gripping side and the tail side of the printing plate 100 having different bending angles can be easily bent to the specified angle.

Therefore, according to such a plate bending apparatus, even one gripping side and a rear side of the printing plate 100 having different bending angles can be easily bent.

Further, the printing plate 100 is bent by rolling the pressing roller 9 along the arc surface of the base 1, so that the printing plate 100 can be bent neatly without being lifted.

Further, the bending angle of the printing plate 100 can be adjusted according to the screwing state of the screw 14, so that the bending angle can be easily set.

In the present embodiment, the engaging pin 15 for engaging with the guide groove 12a of the stopper plate 12 is provided on the axis of the backup roller 10, but the engaging pin 15 is integrated with the arm 2. What is necessary is just to be provided in the place which moves dynamically.

In the present embodiment, as shown in FIG. 5, the base end of the stopper plate 12 is rotatably supported by the pin 11 protruding from the step 101, and protruding from the arm 2 side. The guide groove 12 a of the stopper plate 12 is inserted into the engagement pin 15. For example, as shown in FIG. 8, the base end of the stopper plate 12 is rotatably supported by the pin 11 protruding from the arm 2. The guide groove 12a of the stopper plate 12 can be inserted into the engagement pin 15 protruding from the step 101.

In this embodiment, the regulating means is constituted by the pin 11, the stopper plate 12, the compression coil spring 13, the screw 14, the engaging pin 15, and the like.
It is also possible to constitute a restricting means by a stopper block or the like provided so as to be able to protrude and retract at the step so that the rotation limit position of the arm can be defined.

In this embodiment, the pressing roller 9
Is backed up by the backup roller 10, but when the pressing roller 9 has sufficient rigidity,
The backup roller 10 can be omitted.

In the present embodiment, the rotatable cylindrical pressing roller 9 is used as the plate bending member. Alternatively, for example, an elastic pad or the like may be used as the plate bending member. It is possible.

It is sufficient that the base 1 has an arc surface of a required length along the circumferential direction, and the shape other than the arc surface portion is not particularly limited.

[0038]

According to the plate bending apparatus of the present invention, it is possible to easily bend even one of the gripping side and the tail side of the printing plate having different bending angles.

[Brief description of the drawings]

FIG. 1 is a side view of an embodiment of a plate bending apparatus according to the present invention.

FIG. 2 is a front view as seen from the direction of arrow II in FIG. 1;

FIG. 3 is a sectional view taken along line III-III of FIG.

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 2;

FIG. 5 is an enlarged enlarged view of an arrow V portion in FIG. 1;

FIG. 6 is an extracted cross-sectional view taken along a line VI of FIG. 5;

FIG. 7 is an explanatory diagram of a procedure when plate bending is performed using the plate bending apparatus of FIGS.

FIG. 8 is an extracted enlarged view of a main part of another embodiment of the plate bending apparatus according to the present invention.

FIG. 9 is a sectional view of a main part of an example of a conventional plate bending apparatus.

FIG. 10 is an enlarged enlarged view of a main part of FIG. 9;

[Explanation of symbols]

 1 Base 2 Arm 2a Hole 3 Handlebar 4 Lock Pin 4a Groove 5 Engagement Plate 6 Lock Plate 6a Engagement Hole 7 Shaft 8 Reinforcement Beam 9 Press Roller 10 Backup Roller 11 Pin 11a Washer 12 Stopper Plate 12a Guide Groove 13 Compression Coil Spring 14 Screw 15 Engagement Pin 16 Hook 100 Plate 101 Step 102 Stand

Claims (1)

[Claims] A base having an arcuate surface, an arm supported by the base so as to be rotatable around a center of a radius of curvature of the arcuate surface of the base, and an arm so as to be able to approach and separate from the base. A lock plate movably provided; a plate bending member supported by the lock plate; and a positioning and fixing the lock plate to the arm so that the plate is sandwiched between the arc surface of the base and the plate bending member. A plate bending device, comprising: a fixing means for fixing the arm; and a plurality of restricting means for individually defining a rotation range of the arm.