JP2003276908A - Sheet material positioning device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet material positioning device capable of reducing cost, and adjusting the position of a projected member to a placement member with a compact and lightweight constitution. <P>SOLUTION: In an exposure part 18 of an automatic exposure device 10 for printing plates, the printing plate 12 is abutted on a pair of positioning pins 52, so that the printing plate 12 is positioned in forward-to-back directions. Thereby, a punching mechanism to form a cut in an end edge of the printing plate in conventional devices is not needed, and cost is reduced. The positioning pins 52 are provided on an oscillation plate 76 at positions apart from an oscillation center of it, and an adjusting pin 72 provided on a rotary drum 50 gets in contact with the oscillation plate 76 at a position apart from the oscillation plate 76. An oscillation position of the oscillation plate 76 when the oscillation plate 76 gets in contact with the adjusting pin 72 can be adjusted by changing the diameter of the adjusting pin 72 by change of the pin 72. The rotation position of the positioning pin 52 is thus adjusted, and the position of the positioning pin 52 can be adjusted with a compact and lightweight constitution. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet material positioning device for positioning a sheet material.

[0002]

2. Description of the Related Art As a printing plate exposing device, an image is directly recorded on a image forming layer (photosensitive layer, heat sensitive layer, etc.) of a sheet-shaped printing plate (for example, a so-called photopolyplate or thermal plate) by a laser beam or the like ( What is exposed is being developed.

This printing plate exposing device is provided with, for example, a punching mechanism, and when the printing plate is conveyed to the punching mechanism, a notch (notch punch) is formed at the edge of the printing plate by the punching mechanism.

Further, this printing plate exposure apparatus is provided with an exposure mechanism, and the printing plate after being processed by the punch mechanism is conveyed to the exposure mechanism. The exposure mechanism has a rotating drum,
The printing plate conveyed to the exposure mechanism is placed on the peripheral surface of the rotating drum. Positioning pins are provided on the peripheral surface of the rotary drum, and the printing plate is positioned on the peripheral surface of the rotary drum by aligning the notches with the positioning pins. A recording head unit is provided in the vicinity of the rotating drum, and after the printing plate after the positioning is wound around the peripheral surface of the rotating drum, the rotating drum is rotated at a high speed and a light beam is emitted from the recording head unit to the printing plate. The exposure process is carried out by irradiating with.

However, in such a printing plate exposure apparatus, since the punch mechanism for forming the notch is expensive, there is a problem that the overall cost becomes high.

Further, since the exposure process needs to be performed with high accuracy, high accuracy is required for positioning the printing plate on the peripheral surface of the rotating drum. However, it is difficult to guarantee the positioning accuracy of the positioning pin on the peripheral surface of the rotating drum only by the positioning pin assembly part of the rotating drum and the machining accuracy of the positioning pin. Mechanism for fine adjustment (hereinafter referred to as "position adjustment mechanism")
Is required).

Further, since the rotary drum is rotated at a high speed when the printing plate is exposed, if the rotary drum is deformed by centrifugal force, the distance between the recording head portion and the printing plate is changed and the recorded image is out of focus. May occur. Therefore, in order to prevent the rotary drum from being deformed when it is rotated at a high speed, the position adjusting mechanism needs to be small and lightweight.

[0008]

SUMMARY OF THE INVENTION In consideration of the above facts, the present invention provides a sheet material positioning device capable of reducing the cost and adjusting the position of the abutting member with respect to the mounting member by a small and lightweight mechanism. Is the purpose.

[0009]

A sheet material positioning device according to a first aspect of the present invention comprises a placing member on which a sheet material is placed,
The rocking member provided on the mounting member and capable of rocking, the contact member provided on the mounting member and contacting the rocking member at a position separated from the rocking center, and the rocking member. An abutting member that is provided on the member at a position separated from the swing center and positions the sheet material by abutting the sheet material, and the swing member when the swing member and the contact member come into contact with each other. Adjusting means for adjusting the swing position of the.

In the sheet material positioning apparatus according to the first aspect, the sheet material is positioned by the sheet material placed on the placing member hitting the abutting member. Therefore, the conventional punching mechanism for forming the notch on the edge of the printing plate is not always necessary, and the cost can be reduced.

The abutting member is provided on a swinging member that is swingably provided on the mounting member, and is arranged at a position separated from the swing center of the swinging member. Further, the contact member provided on the placing member comes into contact with the swing member at a position separated from the swing center. Here, the swinging position of the swinging member when the swinging member and the contact member come into contact with each other is adjusted by the adjusting means. As a result, the rotational position of the abutting member around the swing center of the swinging member is adjusted, and the position of the abutting member with respect to the mounting member can be adjusted.

Furthermore, since the position of the abutting member with respect to the mounting member is adjusted only by adjusting the swinging position of the swinging member when the swinging member and the contact member come into contact with each other, the mounting position is adjusted. The mechanism for adjusting the position of the abutting member with respect to the placing member can have a simple structure, which allows the mechanism to be small and lightweight.

A sheet material positioning device according to a second aspect is the sheet material positioning device according to the first aspect.
The plurality of contact members having different swing positions of the swing member when coming into contact with the swing member are provided, and the adjusting means changes the contact member provided on the mounting member to change the swing. The feature is that the swing position of the moving member is adjusted.

According to another aspect of the sheet material positioning apparatus of the present invention, a plurality of contact members having different rocking positions of the rocking member when coming into contact with the rocking member are provided, and the contact member provided on the mounting member as the adjusting means. The swing position of the swing member is adjusted by changing the member. Therefore, the mechanism for adjusting the position of the abutting member can have a sufficiently simple structure, and thereby the mechanism can be favorably made small and lightweight.

A sheet material positioning device according to a third aspect of the present invention is the sheet material positioning device according to the first or second aspect, wherein the contact member is brought into contact with the swing member by changing a rotational position. The oscillating position of the oscillating member at the time of performing is different, and the adjusting means adjusts the oscillating position of the oscillating member by changing the rotational position of the contact member.

In the sheet material positioning device according to the third aspect of the present invention, the rotational position of the contact member is changed so that the rocking position of the rocking member at the time of contact with the contact member is different. The swing position of the swing member is adjusted by changing the rotation position of the contact member as a means. For this reason,
The mechanism for adjusting the position of the abutting member can have a sufficiently simple structure, which can favorably make the mechanism small and lightweight.

A sheet material positioning device according to a fourth aspect is the sheet material positioning device according to any one of the first to third aspects, in which the position at which the swing member comes into contact with the contact member and the The distance from the swing center of the swing member,
The distance between the abutting position of the sheet member of the abutting member and the swing center of the swinging member is made larger.

In the sheet material positioning device according to the fourth aspect, the distance between the position where the rocking member contacts the contact member and the rocking center of the rocking member is the position where the sheet material of the abutting member hits the rocking member. Since the distance is greater than the swing center of the member, the swing distance of the abutting member at the position where the sheet material strikes is smaller than the swing distance of the swing member at the position where it contacts the contact member. Therefore, the resolution of the position of the abutting member can be made higher than the adjustment resolution of the rocking position of the rocking member by the adjusting means, and thus the position of the abutting member can be adjusted with high accuracy.

A sheet material positioning device according to a fifth aspect is the sheet material positioning device according to any one of the first to fourth aspects, in which the sheet material of the abutting member abuts and the wobble. It is characterized in that a straight line passing through the swing center of the moving member is made close to perpendicular to the positioning direction of the sheet material by the abutting member.

In the sheet material positioning device according to the fifth aspect, a straight line passing through a position where the sheet material of the abutting member abuts and a swing center of the swinging member is perpendicular to a direction in which the sheet member is positioned by the abutting member. Is approached. For this reason,
The adjustment direction of the position where the sheet material of the abutting member abuts approaches the parallel direction of the positioning of the sheet material by the abutting member, so that the adjustment amount of the position where the sheet material of the abutting member abuts is adjusted by the adjusting means. To adjust the swing position of
The state can be brought close to a proportional state (the linearity of both adjustment amounts can be increased), and the position of the abutting member can be easily adjusted.

The sheet material positioning device of the present invention is
The sheet material positioning device according to any one of claims 1 to 5, wherein the swing member is fixed to the mounting member by being rotated in one direction, and at the same time the swing member is moved in one direction. A fixing screw that swings to contact the contact member may be provided.

With this configuration, the fixing screw is rotated in one direction, so that the swing member is fixed to the mounting member and at the same time, the swing member is swung in one direction to contact the contact member. To be done. Therefore, when the rocking member is fixed to the mounting member and the position of the abutting member is fixed, it is possible to prevent a gap from being formed between the rocking member and the contact member, and to change the position of the abutting member. It can be adjusted reliably.

[0023]

FIG. 5 is a side view showing a printing plate automatic exposure device 10 according to an embodiment to which the sheet material positioning device of the present invention is applied.

Automatic printing plate exposure apparatus 1 according to the present embodiment
0 is for exposing (recording) an image on an image forming layer (photosensitive layer, heat sensitive layer or the like) on a support in a printing plate 12 such as a photopoly plate or a thermal plate as a sheet material, which is a so-called outer drum system. It is supposed to be. The printing plate automatic exposure device 10 is divided into a conveyance guide unit 14, a punch section 16, and an exposure section 18. The punch section 16 and the exposure section 18 are arranged in front of the conveyance guide unit 14, and The exposure unit 18 is arranged below.

The transport guide unit 14 includes a plate feeding guide 20 having a substantially rectangular plate shape and a plate discharging guide 2 having a substantially rectangular plate shape.
2 and has a plate feeding guide 20 and a plate ejection guide 22.
And the relative positional relationship with each other is a horizontal V-shape. The transport guide unit 14 is structured to rotate around a center of FIG. 5 by a predetermined angle, and by this rotation,
The punch unit 1 selectively selects the plate feeding guide 20 and the plate discharging guide 22.
6 and the exposure unit 18.

As shown in FIG. 4, a transport roller 24 is rotatably provided at the front portion of the plate feed guide 20.
The transport roller 24 is configured such that a plurality of cylindrical roller portions 24A made of silicon rubber are arranged on the rotation center shaft 24B to form a skewer. The transport rollers 24 are arranged in parallel in the left-right direction and project onto the plate feed guide 20, and the transport roller 24 is driven to rotate so that the printing plate 12 placed on the plate feed guide 20 is It is transported forward.

A trapezoidal columnar rib 26 is provided on the plate feed guide 20.
Are provided in a predetermined number, the ribs 26 are arranged parallel to the front-rear direction, and the projecting height of the ribs 26 on the plate feed guide 20 is slightly lower than that of the transport roller 24. further,
A cylindrical rotary roller 28 is rotatably provided on the plate feed guide 20 by a predetermined number of rotations. The rotary roller 28 is arranged parallel to the left-right direction and has a protruding height above the plate feed guide 20. It is substantially the same as the transport roller 24. Here, the printing plate 12 is supported by the ribs 26 of the printing plate 12 and the rotation of the rotary roller 28 accompanying the conveyance of the printing plate 12.
It is intended to reduce the frictional force when transporting.

At the front end of the plate feed guide 20, a pair of positioning pins 30 are provided in parallel with each other in the left-right direction, and each positioning pin 30 has a cylindrical shape and is rotatable about a central axis. , Protrudes from the upper surface of the plate feed guide 20. As described above, the printing plate 1 is conveyed by the transport roller 24.
When 2 is conveyed forward, the front end of the printing plate 12 hits the pair of positioning pins 30. As a result, the printing plate 12
The position in the front-back direction is determined. Further, the pair of positioning pins 30 can be lowered from the upper surface of the plate feeding guide 20, and thereby the printing plate 12 can be transported forward by the transport roller 24 beyond the front end of the plate feeding guide 20. ing.

A slit hole 32 is formed in the right side portion of the plate feed guide 20 in the vicinity of the rear side of the transport roller 24. The slit hole 32 is arranged in parallel in the left-right direction, and the support shaft 34 penetrates inside. Has been done. A cylindrical reference pin 36 is rotatably supported on the support shaft 34 about the support shaft 34.
As the reference pin 36 is moved in the left-right direction by being moved along 2, the reference pin 36 is arranged at a position predetermined by the size of the printing plate 12 placed on the plate supply guide 20.

A slit hole 38 is formed on the left side of the plate feed guide 20 in the vicinity of the rear side of the transport roller 24. The slit hole 38 is arranged parallel to the left-right direction, and a support shaft 40 penetrates inside. Has been done. A cylindrical transport pin 42 is rotatably supported on the support shaft 40 about the support shaft 40. When the front end of the printing plate 12 hits the pair of positioning pins 30, the support shaft 40 is supported. Is moved to the right along the slit hole 38 to move the transport pin 4
2 is moved. As a result, the transport pin 42 is attached to the printing plate 1.
By pressing 2 and transporting it to the right, the printing plate 12 abuts the reference pin 36, and the position of the printing plate 12 in the left-right direction is determined.

As described above, the position of the printing plate 12 in the front-rear direction is determined by the pair of positioning pins 30, and the printing plate 1 is moved by the transport pin 42 and the reference pin 36.
By determining the position of 2 in the left-right direction, the printing plate 12 is provisionally positioned.

The punch section 16 is provided with a flat plate-shaped support plate 44, and a predetermined number of punch devices 46 are supported on the support plate 44 (a total of four punch devices, one pair on each side in the present embodiment). . Here, the conveyance guide unit 14 is rotated, the plate feed guide 20 is made to correspond to the punch section 16 (opposed to the punch device 46), and the pair of positioning pins 30 are lowered from the upper surface of the plate feed guide 20, Punching device 46
The front end of the printing plate 12 is conveyed from the plate supply guide 20 by the conveying roller 24.

Positioning pins 48 are provided between each pair of punching devices 46. The pair of positioning pins 48 are arranged in parallel in the left-right direction, and each of them has a cylindrical shape with a central axis. It is supposed to be rotatable around the center. The front end of the printing plate 12 conveyed into the punch device 46 abuts on the pair of positioning pins 48, and the printing plate 12 is pressed.
The position in the front-back direction is determined. Further, the transport pin 42 is moved and the printing plate 12 abuts the reference pin 36 in the same manner as described above, whereby the position of the printing plate 12 in the left-right direction is determined. As a result, the printing plate 12 is fully positioned in the punch section 16.

A predetermined number of punch holes (not shown) such as circular holes and long holes are punched by the punching device 46 at the front end portion of the printing plate 12 which has been finally positioned in this way. The predetermined number of punch holes serve as a reference for winding the printing plate 12 around the plate cylinder of a rotary press of a printing device (not shown), which will be described later. When the processing in the punch device 46 is completed,
The printing plate 12 is returned to the plate feeding guide 20 by the reverse rotation of the transport roller 24, and the pair of positioning pins 30 are projected from the upper surface of the plate feeding guide 20 to temporarily position the printing plate 12 again in the same manner as above. .

The exposure section 18 is provided with a cylindrical rotary drum 50 as a mounting member, and the rotary drum 50 is arranged parallel to the left-right direction and is rotatable in the directions of arrows A and B in FIG. It is said that. Here, when the printing plate 12 returned from the punch section 16 onto the plate supply guide 20 is temporarily positioned as described above, the transport guide unit 14 is rotated and the plate supply guide 20 corresponds to the exposure section 18 ( Rotating drum 5
0 tangential to each other) and a pair of positioning pins 30
Is moved down from the upper surface of the plate feed guide 20, whereby the front end of the printing plate 12 is conveyed and placed on the peripheral surface of the rotary drum 50 by the conveying rollers 24.

A pair of installation recesses 70 having a rectangular parallelepiped shape are provided on the peripheral surface of the rotary drum 50.
Are arranged parallel to the left-right direction, and each has a cylindrical mounting hole (not shown) formed on the front side of the bottom surface.

As shown in FIG. 1, in each installation recess 70,
A cylindrical adjustment pin 72 as a contact member is arranged. As shown in FIG. 2, a cylindrical mounting shaft 74 is integrally provided at the center of the bottom surface of the adjusting pin 72. By mounting the mounting shaft 74 in the mounting hole, the adjusting pin 72 is mounted on the rotary drum 50. Has been. Further, the attachment shafts 74 of the other adjustment pins 72 having different diameters can be attached to the attachment holes.

Inside each of the installation recesses 70, a swing plate 76 having a substantially rectangular plate shape is disposed as a swing member. Swing plate 7
On the rear surface of 6, the support shaft 78 having a cylindrical shape is formed at the rear portion on the left side.
Is provided, and the support shaft 78 is attached to the rear side of the bottom surface of the installation recess 70, so that the swing plate 76 is attached to the support shaft 78.
It is attached to the rotary drum 50 in a state in which it can swing around.

On the back surface of the oscillating plate 76, a rectangular parallelepiped accommodating recess 80 is formed at the front. Accommodation recess 80
Has a left wall and a rear wall, the right side and the front side are open, and the accommodation pin 80 accommodates the adjustment pin 72 therein.

A cylindrical through hole 82 is formed on the back surface of the oscillating plate 76 at the front-rear intermediate portion on the left side, and a fixing screw 84 is arranged in the through hole 82. Fixing screw 84
Has a cylindrical head portion 86 and a threaded portion 88. The head portion 86 has a larger diameter than the through hole 82, and the threaded portion 8
8 is smaller in diameter than the through hole 82. Fixing screw 84
Is a so-called right screw, and the screw portion 88 is installed by rotating the fixing screw 84 (head portion 86) clockwise (one direction) while the screw portion 88 is penetrated into the through hole 82. The swing plate 76 is fixed to the bottom surface of the recess 70, and the swing plate 76 is sandwiched between the head portion 86 and the rotary drum 50 so that the swing plate 76 is fixed to the rotary drum 50. Moreover, when the fixing screw 84 is rotated clockwise, the bottom surface of the head 86 is moved to the swing plate 7.
6 and the swing plate 76 swings clockwise,
The left wall of the accommodation recess 80 (a position separated from the support shaft 78 of the swing plate 76) is in contact with the adjustment pin 72. Further, when the mounting shaft 74 of another adjusting pin 72 having a different diameter is mounted in the mounting hole as described above, the adjusting pin 72 and the swing plate 7 are attached.
The rocking position of the rocking plate 76 at the time of contact with 6 is different.

On the surface of the oscillating plate 76, a positioning pin 52 (bearing) as an abutting member is provided at the right rear portion (a position separated from the support shaft 78), and the positioning pin 52 has a cylindrical shape. And is rotatable around the central shaft 52A, and projects rearward from the swing plate 76. The positioning pins 52 project from the peripheral surface of the rotary drum 50, and the pair of positioning pins 52 are attached to the rotary drum 50.
The front end of the printing plate 12 conveyed on the peripheral surface hits,
The position of the printing plate 12 in the front-back direction is determined. Further, as in the above, the transport pin 42 is moved to move the printing plate 12
By hitting the reference pin 36, the position of the printing plate 12 in the left-right direction is determined. As a result, the exposure unit 1
At 8, the printing plate 12 is finally positioned.

As shown in FIG. 3, the oscillating plate 76 (the accommodation recess 8
(0 left wall) contacts the adjusting pin 72 and the swing plate 76.
The distance L1 from the center of swinging (the center of the support shaft 78) is larger than the distance L2 between the position where the front end of the printing plate 12 of the positioning pin 52 abuts (rear end) and the center of swinging of the swing plate 76. . Further, the angle θ of the straight line l1 passing through the rotation center of the positioning pin 52 (center of the central axis 52A) and the swing center of the swing plate 76 with respect to the left-right direction is reduced, and the front end of the printing plate 12 of the positioning pin 52 abuts. Position (rear end)
A straight line 12 that passes through the rocking plate 76 and the center of rocking of the rocking plate 76 indicates the positioning direction of the printing plate 12 by the positioning pins 52 (front-back direction).
It is close to the vertical.

As shown in FIG. 5, a plate-like front end chuck 54 is provided on the peripheral surface of the rotary drum 50 in the vicinity of the pair of positioning pins 52. The front end chuck 54 is rotatably supported by the rotary drum 50, and an elastic force is applied to the front side of the front end chuck 54 in a direction away from the peripheral surface of the rotary drum 50.

A mounting cam 56 is provided above the front end chuck 54.
The mounting cam 56 presses the front side of the front end chuck 54, so that the rear side of the front end chuck 54 is separated from the peripheral surface of the rotary drum 50. As a result, the front end of the printing plate 12 conveyed from the plate feed guide 20 onto the peripheral surface of the rotary drum 50 as described above is inserted between the rear side of the front end chuck 54 and the peripheral surface of the rotary drum 50. The main positioning of the printing plate 12 is performed. In addition, the printing plate 12
After the main positioning of the front end chuck 54 is completed, the mounting cam 56 is rotated to release the pressing force on the front side of the front end chuck 54, so that the rear side of the front end chuck 54 presses the front end of the printing plate 12 by the elastic force to rotate the rotary drum. The front edge of the printing plate 12 is held on the 50th circumferential surface. Further, the printing plate 12 is provided on the peripheral surface of the rotary drum 50.
When the front end of the rotary drum 50 is held, the rotary drum 50 moves toward the arrow A in FIG.
And the printing plate 12 is wound around the peripheral surface of the rotary drum 50.

A squeeze roller 58 is disposed near the peripheral surface of the rotary drum 50 on the side of the mounting cam 56 in the direction of arrow A in FIG. When the squeeze roller 58 is moved to the rotary drum 50 side, the squeeze roller 58 is rotated while pressing the printing plate 12 wound around the rotary drum 50 toward the rotary drum 50, and the printing plate 12 is brought into close contact with the peripheral surface of the rotary drum 50. Let

A rear end chuck attaching / detaching unit 60 is arranged near the peripheral surface of the rotary drum 50 between the mounting cam 56 and the squeeze roller 58. The rear end chuck attaching / detaching unit 60 has a shaft 62, and the shaft 62 is movable toward the rotary drum 50.
A trailing end chuck 64 is attached to the tip of the shaft 62. When the trailing end of the printing plate 12 wound around the rotating drum 50 faces the trailing end chuck attaching / detaching unit 60, the shaft 62 moves the trailing end chuck 64 to the rotating drum 50. The trailing end chuck 64 is detached from the shaft 62 at the same time as it is moved to the side and mounted at a predetermined position on the rotary drum 50. As a result, the trailing edge chuck 64 presses the trailing edge of the printing plate 12, and the trailing edge of the printing plate 12 is held on the peripheral surface of the rotary drum 50.

As described above, when the front end and the rear end of the printing plate 12 are held on the rotating drum 50 by the front end chuck 54 and the rear end chuck 64, the squeeze roller 58 is separated from the rotating drum 50 and then the rotating drum 50. Is rotated at a high speed at a predetermined rotation speed.

A recording head portion 66 is arranged near the peripheral surface of the rotary drum 50, and the recording head portion 66 faces the rotary drum 50 which is rotated at a high speed.
The light beam modulated based on the read image data is emitted in synchronization with the rotation of the printing plate 12,
Are exposed based on the image data. This exposure process
This is so-called scanning exposure, in which the recording head unit 66 is moved in the axial direction of the rotating drum 50 (sub scanning) while the rotating drum 50 is rotated at high speed (main scanning).

When the scanning exposure of the printing plate 12 is completed, the rotary drum 50 is temporarily stopped at the position where the rear end chuck 64 faces the shaft 62, and the shaft 62 removes the rear end chuck 64 from the rotary drum 50. (The rear end chuck 64 is attached to the shaft 62), and the pressing of the rear end of the printing plate 12 by the rear end chuck 64 is released. Further, the transport guide unit 14 is rotated so that the plate discharge guide 22 corresponds to the exposure unit 18 (the rotary drum 50).
(Opposite to the tangential direction), the rotary drum 50 is rotated in the direction of arrow B in FIG. 5, and the printing plate 12 is discharged from the rear end side to the plate discharge guide 22. At this time, the mounting cam 5
By rotating 6 to press the front side of the front end chuck 54, the pressing of the front end of the printing plate 12 by the rear side of the front end chuck 54 is released. When the printing plate 12 is sent to the plate ejection guide 22, the transport guide unit 14 is rotated to eject the printing plate 12 from the plate ejection guide 22.
The printing plate 12 is conveyed to a developing device or a printing device (not shown) in the next step adjacent to the printing plate automatic exposure device 10.

Next, the operation of this embodiment will be described.

First, the printing plate 12 is placed on the plate feed guide 20. At this time, so-called manual feeding may be used, or feeding may be performed by an automatic sheet feeding device or the like.

The printing plate 12 on the plate feeding guide 20 is placed in a state where the placement position and the inclination with respect to the plate feeding guide 20 are relatively rough. In this state, the printing plate 12 is moved forward by the transport roller 24. The printing plate 12 is provisionally positioned by transporting the printing plate 12 to the front end of the printing plate 12 against the pair of positioning pins 30 and moving the transport pin 42 to abut the printing plate 12 against the reference pin 36.

In this temporary positioning state, when the transport guide unit 14 is rotated to make the plate feed guide 20 correspond to the punch section 16 and the pair of positioning pins 30 is lowered from the upper surface of the plate feed guide 20, the transport roller 24 is moved. By transporting the printing plate 12 forward by abutting the front end of the printing plate 12 against the pair of positioning pins 48 of the punch section 16 and moving the transport pin 42 to abut the printing plate 12 against the reference pin 36, The printing plate 12 is finally positioned in the punch section 16. The printing plate 1 which is book-positioned in this way
After a predetermined number of punch holes are punched by the punching device 46 at the front end of 2, the printing plate 12 is returned to the plate feed guide 20 by the reverse rotation of the transport roller 24, and the pair of positioning pins 30 is moved to the plate feed guide 20. The printing plate 12 is provisionally positioned again by projecting it from the upper surface in the same manner as above.

Further, in this temporary positioning state, the transport guide unit 14 is rotated so that the plate feed guide 20 is exposed.
No. 8 and the pair of positioning pins 30 are lowered from the upper surface of the plate feed guide 20, the printing plate 12 is transported forward by the transport roller 24 and the front end of the printing plate 12 is paired with the pair of positioning pins 52 of the rotary drum 50. The printing plate 12 is moved to the reference pin 36 by moving the transport pin 42 while the printing plate 1 is moved to the printing plate 1 in the exposure unit 18.
2 is finally positioned. In the printing plate 12 that has been finally positioned in this way, the front end and the rear end of the front end chuck 54 respectively.
It is held on the peripheral surface of the rotary drum 50 by the rear end chuck 64, and is wound around the peripheral surface of the rotary drum 50 while being in close contact with the peripheral surface of the rotary drum 50 by the squeeze roller 58. After that, the rotary drum 50 is rotated at a high speed, and the recording head unit 66 performs the exposure process.

When the exposure process is completed, the transport guide unit 14 is rotated to make the plate discharge guide 22 correspond to the rotary drum 50, and the front end chuck 54 and the rear end chuck 64 guide the printing plate 12 to the peripheral surface of the rotary drum 50. While releasing the holding, the printing plate 12 is discharged from the rotary drum 50 to the plate discharge guide 22. Then, the conveyance guide unit 14 is rotated to convey the printing plate 12 from the plate ejection guide 22 to the developing device or the printing device.

Here, as described above, in the exposure section 18, the front end of the printing plate 12 placed on the rotary drum 50 abuts against the pair of positioning pins 52, whereby the printing plate 12 is positioned in the front-rear direction. Therefore, the conventional punching mechanism for forming the notch on the edge of the printing plate is not always necessary, and the cost can be reduced.

The positioning pin 52 is used for the rotary drum 5
It is provided on a swing plate 76 that is swingable at 0, and is arranged at a position separated from the swing center of the swing plate 76 (center of the support shaft 78). Furthermore, the rotary drum 50
The adjusting pin 72 provided on the contact plate contacts the rocking plate 76 at a position (left wall of the housing recess 80) separated from the rocking center thereof. Here, by changing (changing) the adjustment pin 72 for attaching the attachment shaft 74 to the attachment hole of the installation recess 70, the diameter of the adjustment pin 72 is changed so that the swing plate 76 and the adjustment pin 72 come into contact with each other. The swing position of the swing plate 76 is adjusted. As a result, the rotational position of the positioning pin 52 about the swing center of the swing plate 76 is adjusted, and the rotary drum 50 is adjusted.
The position of the positioning pin 52 with respect to can be adjusted (finely adjusted).

Further, the position of the positioning pin 52 with respect to the rotary drum 50 is adjusted only by adjusting the swing position of the swing plate 76 when the swing plate 76 and the adjustment pin 72 contact each other. Because of the configuration, the mechanism for adjusting the position of the positioning pin 52 with respect to the rotary drum 50 can be made sufficiently simple, and thereby the mechanism can be favorably made small and lightweight. Therefore, even when the rotary drum 50 is rotated at a high speed when the printing plate 12 is subjected to the exposure process, it is possible to prevent the rotary drum 50 from being deformed by the centrifugal force, and thus the distance between the recording head unit 66 and the printing plate 12 is reduced. It is possible to suppress the occurrence of out-of-focus effects on the recorded image due to the change of.

By rotating the fixing screw 84 clockwise, the rocking plate 76 is fixed to the rotary drum 50, and at the same time, the rocking plate 76 is rocked clockwise to the left of the accommodation recess 80. The wall contacts the adjustment pin 72. Therefore, the swing plate 7
When 6 is fixed to the rotary drum 50 and the position of the positioning pin 52 is fixed, it is possible to prevent a gap from being formed between the oscillating plate 76 and the adjustment pin 72, and to reliably adjust the position of the positioning pin 52. can do.

Furthermore, as shown in FIG.
Is a distance L1 between the position where the printing plate 12 of the positioning pin 52 abuts (the rear end) and the swing center of the swing plate 76.
2 is larger than the swinging distance of the swinging plate 76 at the position where it contacts the adjusting pin 72.
The rotation distance of the positioning pin 52 at the position where the abuts against each other becomes small. Therefore, as shown in FIG.
The resolution of the position of the positioning pin 52 can be made higher than the adjustment resolution of the swing position of the swing plate 76 by changing the diameter of 2.
Accordingly, the position of the positioning pin 52 can be adjusted with high accuracy.

Further, as shown in FIG. 3, the positioning pin 52
The straight line 12 that passes through the position where the printing plate 12 of FIG.
It is close to being perpendicular to the second positioning direction (front-back direction). Therefore, the adjustment direction of the position where the printing plate 12 of the positioning pin 52 abuts becomes parallel to the positioning direction of the printing plate 12 by the positioning pin 52, and as a result, the printing plate 12 of the positioning pin 52 abuts as shown in FIG. The adjustment amount of the position can be brought closer to a state proportional to the adjustment amount of the swing position of the swing plate 76 by changing the diameter of the adjustment pin 72 (the linearity of both adjustment amounts can be increased), and the positioning pin 52 can be adjusted. The position can be adjusted easily.

In this embodiment, as the adjusting means, the diameter of the adjusting pin 72 is changed by changing the adjusting pin 72 for attaching the mounting shaft 74 to the mounting hole of the installation recess 70.
The swing plate 76 when the swing plate 76 and the adjustment pin 72 contact each other
Although the swing position is adjusted, a cam member may be used as the adjusting means. For example, as shown in FIG. 7, in addition to the center of the bottom surface of the adjustment pin 90, a cylindrical mounting shaft 92 is provided.
May be integrally provided, and the mounting shaft 92 may be mounted in the mounting hole of the installation recess 70. As a result, the adjustment pin 90
By changing the rotational position of the adjustment pin 90,
The rocking position of the rocking plate 76 can be different when the rocking plate 76 comes into contact with 6 (the left wall of the housing recess 80).

Further, in the present embodiment, a pair of positioning pins 30, 48, 52 are provided, respectively.
Four positioning pins may be provided, one pair for the large-sized printing plate 12 and one pair for the small-sized printing plate 12.

Further, in the present embodiment, the present invention is applied to the positioning pin 52. However, the present invention is applied to the positioning pin 30 and the positioning pin 48, and the present invention is applied to the reference pin 36 and the carrying pin. The configuration applied to the pin 42 may be used.

Further, in the present embodiment, the present invention is applied to the outer drum type printing plate automatic exposure device 10. However, the present invention is so-called flat bed type or so-called inner drum type printing plate automatic exposure device. The configuration may be applied to.

[0066]

In the sheet material positioning device according to the first aspect of the invention, since the sheet material is positioned by the sheet material hitting the abutting member, a conventional punching mechanism for forming a notch in the edge of the printing plate is used. It is not always necessary and the cost can be reduced.

Further, since the swinging position of the swinging member when the swinging member and the contact member come into contact with each other is adjusted by the adjusting means, the rotating position of the abutting member is adjusted and the swinging position of the abutting member is adjusted. The position of the member can be adjusted.

Furthermore, since the position of the abutting member with respect to the mounting member is adjusted only by adjusting the swinging position of the swinging member when the swinging member and the contact member come into contact with each other, the mounting position is adjusted. The mechanism for adjusting the position of the abutting member with respect to the placing member can be made small and lightweight.

In the sheet material positioning device according to the second aspect, since the swinging position of the swinging member is adjusted by changing the contact member provided on the mounting member as the adjusting means, the position of the abutting member is adjusted. The mechanism can be favorably made compact and lightweight.

In the sheet material positioning device according to the third aspect, the swinging position of the swinging member is adjusted by changing the rotational position of the contact member as the adjusting means. Therefore, the position of the abutting member is adjusted. The mechanism can be favorably made compact and lightweight.

In the sheet material positioning device according to the fourth aspect, the distance between the position where the rocking member contacts the contact member and the rocking center of the rocking member is the rocking position where the sheet material of the abutting member abuts. Since the distance from the swing center of the member is made larger, the resolution of the position of the abutting member can be made higher than the adjustment resolution of the swing position of the swinging member by the adjusting means, and the position of the abutting member can be accurately adjusted. Can be adjusted.

In the sheet material positioning device according to the fifth aspect, a straight line passing through the position where the sheet material of the abutting member abuts and the swing center of the swinging member is perpendicular to the direction in which the sheet material is positioned by the abutting member. Since the adjustment amount of the position where the sheet material of the abutting member abuts is close to the adjustment amount of the rocking position of the rocking member by the adjusting means, the adjustment amount of the abutting member The position can be adjusted easily.

[Brief description of drawings]

FIG. 1 is a perspective view showing a mechanism for adjusting the position of a positioning pin in an exposure unit of an automatic printing plate exposure apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view from the back side showing a mechanism for adjusting the position of the positioning pin in the exposure unit of the printing plate automatic exposure apparatus according to the embodiment of the present invention.

FIG. 3 is a rear view showing the mechanism for adjusting the position of the positioning pin in the exposure unit of the printing plate automatic exposure apparatus according to the embodiment of the present invention.

FIG. 4 is a schematic perspective view showing an automatic printing plate exposure apparatus according to an embodiment of the present invention.

FIG. 5 is a schematic side view showing a printing plate automatic exposure device according to an embodiment of the present invention.

FIG. 6 is a graph showing the relationship between the amount of change in the diameter of the adjustment pin and the amount of change in the position of the positioning pin in the front-rear direction in the exposure unit of the printing plate automatic exposure apparatus according to the embodiment of the present invention.

FIG. 7 is a perspective view from the back side showing another example of the mechanism for adjusting the position of the positioning pin in the exposure unit of the printing plate automatic exposure apparatus according to the embodiment of the present invention.

[Explanation of symbols]

10 Automatic printing plate exposure device 12 Printing plate (sheet material) 50 rotating drum (mounting member) 52 Positioning pin (abutting member) 72 Adjustment pin (contact member) 76 Oscillating plate (oscillating member) 84 fixing screw 90 Adjustment pin (contact member)

Claims (5)

[Claims] 1. A placing member on which a sheet material is placed, a swinging member provided on the placing member and capable of swinging, and a placing member provided on the placing member, wherein A contact member which comes into contact with the swing member at a position spaced apart from the swing center; and an abutting member which is provided on the swing member at a position spaced from the swing center, and which positions the sheet member by abutting the sheet member, A sheet material positioning device comprising: an adjusting unit that adjusts a swing position of the swing member when the swing member and the contact member come into contact with each other. 2. A plurality of the contact members having different rocking positions of the rocking member when coming into contact with the rocking member, wherein the adjusting means changes the contact member provided on the mounting member. The sheet material positioning device according to claim 1, wherein the swinging position of the swinging member is adjusted by doing so. 3. The contact member has a different swing position when the contact member comes into contact with the swing member by changing the rotation position, and the adjusting means rotates the contact member. The sheet material positioning device according to claim 1 or 2, wherein the swing position of the swing member is adjusted by changing the position. 4. The distance between the position where the rocking member contacts the contact member and the rocking center of the rocking member, the position where the sheet material of the abutting member abuts and the rocking motion of the rocking member. The sheet material positioning device according to any one of claims 1 to 3, wherein the distance is larger than the distance from the center. 5. A straight line passing through a position at which the sheet material of the abutting member abuts and a swing center of the swinging member is close to a direction perpendicular to a positioning direction of the sheet material by the abutting member. The sheet material positioning device according to any one of claims 1 to 4, wherein: