JP2003012165A - Slip sheet removing mechanism for printing plate sheet conveying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To require no monitoring whether or not a ship sheet is nipped and certainly nipped up the slip sheet only by a simple action by a time sequence when a removal of the slip sheet required accompanying with sheet feeding of a printing plate is carried out. SOLUTION: When the uppermost layer is the slip sheet, a descending of an slip sheet removing mechanism 46 is started. At the time of this descending, (1) a butting of a grip member 170 at a tip end of a liftable plate 158 to the slip sheet 44; (2) a relative movement of a support part 150 to an operation part 152; (3) a rotation of a lock lever 178; (4) a rotation of the other nipping member 164 making a shaft 166 as a center (approach to one nipping member 162) by a pressing plate 172; (5) loosening and nipping of the slip sheet 44 by the grip member 170; and (6) a retention by the lock lever 178 in the nipping state are continuously executed. Thereafter, a raising of the slip sheet removing mechanism 46 is started and a delivery of the slip sheet 44 to a pair of rollers 106 is executed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing plate sheet feeding apparatus compound in which printing plates are sequentially stacked from the uppermost layer in a state where the printing plates are stacked in layers and accommodated in a cassette, and then conveyed in the next step. Regarding the paper removal mechanism.

[0002]

2. Description of the Related Art A technique has been developed in which a printing plate having an image forming layer provided on a support is used and an image is directly recorded on the image forming layer of the printing plate by a laser beam or the like (printing plate exposing device). ). With such a technique, it is possible to quickly record an image on a printing plate.

In a printing plate automatic exposure apparatus using a technique of recording an image on a printing plate, a cassette containing a large number of printing plates stacked therein is loaded, and the printing plates are individually transferred from the cassette. It is possible to take out (single sheet) and send it to the exposure unit.

The cassette is placed substantially parallel to the installation surface of the apparatus, and a plurality of printing plates are stacked on the stacking base of the cassette.

In this state, in order to separate the uppermost printing plate into sheets, the printing plate is usually sucked by a suction cup, and the sucked suction cup is guided to a guide rail or the like to the exposure unit which is the next step. I try to send it in.

By the way, this printing plate is provided with a thin film-like protective sheet (hereinafter referred to as interleaving paper) for protecting the printing surface, and as a result, the printing plate and interleaving paper are alternately laminated. ing. Therefore, it is necessary to alternately remove the interleaving paper and the operation of sending the printing plate to the exposure unit in the next step.

Since the interleaving paper is thin and lightweight,
A pair of rods are arranged perpendicularly to the interleaving paper surface, and are lowered from above the interleaving paper at predetermined intervals in parallel with each other.
Bring them close to each other while they are in contact with the slip sheet. A knob member such as rubber is attached to the contact portion of the stick with the interleaving paper, and the interleaving paper is slackened and pinched by the approach, and the stick is lifted as it is to pick up the interleaving paper. (See, for example, Japanese Patent No. 3105217 and Japanese Patent No. 3058635).

[0008]

However, in the above-mentioned conventional structure, when the pair of rods move closer to each other, they always move in contact with the interleaving paper, so that the fluctuation of the contact pressure with the interleaving paper causes the load of operation. Directly affect. For this reason, if the movement stops during the operation, the rod body will rise before it reliably holds the slip sheet,
It is expected that the pick-up will fail.

In order to solve this, a monitoring means for detecting the positional relationship of the rods and the sandwiching of the interleaving paper is required, which leads to an increase in the number of parts and a complicated control. Become.

In consideration of the above facts, the present invention does not need to monitor whether the interleaving paper is pinched or not when eliminating the interleaving paper which is necessary when the printing plate is fed, and uses a simple time sequence. An object of the present invention is to obtain a slip sheet excluding mechanism for a printing plate sheet conveying device, which can reliably pick up the slip sheet only by operation.

[0011]

According to a first aspect of the present invention, a thin sheet-like interleaving paper for protecting a printing plate and a printing plate are alternately stacked and stored in a cassette. A slip sheet excluding mechanism used for a printing plate sheet conveying device that sequentially separates the plates and conveys the sheets to the next step, and that eliminates the slip sheet before the sheets of the printing plate are formed. A support portion that is disposed so as to face each other and that can move toward and away from the slip sheet; and an operation portion that is attached to the support portion so as to be relatively movable in the movement direction of the support portion. The operation portion has a pair of sandwiching members in which one member is fixedly arranged with respect to the interleaf sheet surface and the other member is capable of approaching and separating from at least one in an arcuate path, and the operation member and the support member are operated. The relative movement with respect to the section causes the one sandwiching member to contact the interleaf sheet surface. Starts at a point, the other clamping member together to arc track shifting by utilizing the relative moving force,
It is characterized in that the interleaving paper is slid with respect to the printing plate surface along with the arcuate trajectory so as to be loosened, and the loosened portion is sandwiched by one sandwiching member.

According to the first aspect of the present invention, one member of the pair of sandwiching members is fixedly arranged, and the other member is moved in an arcuate path, thereby gradually approaching the interleaving paper. Since the interleaving paper is slackened and is sandwiched between one member, it does not impose a large load on the movement of the other member, and is reliably moved until the interleaving paper is sandwiched between the one member. be able to. For this reason, a sensor or the like for monitoring whether or not the interleaving paper is sandwiched is unnecessary, and the control system can be reduced.

When the other member of the sandwiching member is moved, the contact portion with the interleaving paper can be expanded and contracted by the urging force.
Furthermore, the load during operation can be stabilized.

According to a second aspect of the present invention, in the first aspect of the present invention, the support portion is provided, and operates in association with a relative movement with an operating portion in a direction of approaching the interleaf sheet. The device further includes a blocking unit that maintains the sandwiched state of the interleaf sheet by the pair of sandwiching members by blocking the relative movement of the operation unit during the movement of the support unit by a predetermined amount in the direction opposite to the relative movement direction. A slip sheet excluding mechanism for a printing plate sheet conveying device according to claim 1.

According to the second aspect of the present invention, the relative movement of the operation portion with respect to the support portion and the switching of the integral movement can be executed by a so-called mechanical operation linked with a series of operations.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a printing plate automatic exposure apparatus 10 according to this embodiment.

The printing plate automatic exposure device 10 is provided with a printing plate 1.
It is divided into two blocks: an exposure unit 14 that irradiates an image by irradiating an image forming layer with a light beam to expose an image, and a sheet-fed conveyance unit 15 that separates the printing plate 12 and conveys it to the exposure unit 14. There is. The printing plate 12 exposed by the printing plate automatic exposure device 10 is sent to a developing device (not shown) installed adjacent to the printing plate automatic exposure device 10. (Structure of Exposure Unit) The exposure unit 14 is configured by a rotating drum 16 that winds and holds the printing plate 12 around the peripheral surface, and the printing plate 12 is guided by the transport guide unit 18 and The rotary drum 16 is fed in from the tangential direction. The transport guide unit 18 includes a plate feed guide 20 and a plate discharge guide 22, and a transport roller 108 and a guide plate 109 are arranged on the boundary side of the transport guide unit 18 with the sheet transport unit 15. It is set up.

A plate feed guide 20 of the transport guide unit 18
The relative positional relationship between the stencil sheet ejection guide 22 and the plate ejection guide 22 is a horizontal V shape, and the stencil sheet ejection guide 22 and the plate ejection guide 22 are rotated by a predetermined angle about the center on the right end side in FIG. By this rotation, the plate feeding guide 2
0 or the plate discharge guide 22 is selectively associated with the rotary drum 16 (arranged in the tangential direction of the rotary drum 16).
be able to.

A puncher 24 is provided near the transport guide unit 18, and the plate feed guide 20 is provided.
The front end of the printing plate 12 can be fed to the puncher 24 by facing the puncher 24.

The printing plate 12 fed from the sheet feeding section 15 is first guided by the plate feeding guide 20 and fed to the puncher 24, and a notch for positioning is formed at the tip of the printing plate 12.

After being processed by the puncher 24, the printing plate 12 is temporarily returned to the plate feeding guide 20 and moved to a position corresponding to the rotary drum 16.

The rotary drum 16 is driven by a driving means (not shown) to set the exposure direction of the printing plate 12 (direction of arrow A in FIG. 1) and the removing direction of the printing plate 12 opposite to the mounting exposure direction (arrow B of FIG. 1). Direction).

As shown in FIG. 1, the rotary drum 16 provided in the exposure unit 14 has a tip chuck 26 attached at a predetermined position on the outer peripheral surface thereof. Exposure unit 14
Then, when the printing plate 12 is mounted on the rotary drum 16, first, the tip chuck 26 is moved by the transport guide unit 1
Rotating drum 1 at a position (printing plate mounting position) facing the front end of printing plate 12 fed by plate feeding guide 20
Stop 6

The exposure unit 22 is provided with a mounting cam 28 facing the tip chuck 26 at the printing plate mounting position.
The tip chuck 26 can insert the printing plate 12 between itself and the peripheral surface of the rotating drum 16 by rotating the mounting cam 28 and pressing one end side thereof.

In the exposure section 14, with the front end of the printing plate 12 inserted between the front end chuck 26 and the rotary drum 16, the mounting cam 28 is returned to release the pressure on the front end chuck 26, and the printing plate 12 is released. The tip of 12 is clamped and held between the tip chuck 26 and the peripheral surface of the rotary drum 16.

At this time, the printing plate 12 is the puncher 2
Positioning with respect to the rotary drum 16 is made by inserting a positioning pin (not shown) projecting at a predetermined position on the peripheral surface of the rotary drum 16 into the notch formed by 4. Note that the printing plate 12 may be positioned by abutting the tip thereof.

In the exposure section 14, when the front end of the printing plate 12 is fixed to the rotary drum 16, the rotary drum 16 is rotated in the mounting exposure direction. As a result, the transport guide unit 18
The printing plate 12 fed from the plate feeding guide 20 is wound around the peripheral surface of the rotating drum 16.

In the vicinity of the peripheral surface of the rotary drum 16, the squeeze roller 3 is located downstream of the printing plate mounting position in the mounting exposure direction.
0 is placed. The squeeze roller 30 moves toward the rotary drum 16 to move the rotary drum 16.
The printing plate 12 wound on the rotary drum 16 is pressed against the rotating drum 16 to bring the printing plate 12 into close contact with the peripheral surface of the rotating drum 16.

The exposure unit 14 includes a squeeze roller 3
The trailing edge chuck attachment / detachment unit 32 is arranged in the vicinity of the downstream side of the rotary drum 54 in the mounting exposure direction with respect to 0. A rear end chuck 36 is attached to the rear end chuck attachment / detachment unit 32 at the tip of a shaft 34 protruding toward the rotary drum 16.

In the exposure section 14, the trailing edge of the printing plate 12 wound around the rotary drum 16 is the trailing edge chuck attaching / detaching unit 3
When facing 2, the shaft 34 is projected and the rear end chuck 36 is mounted at a predetermined position on the rotary drum 16. As a result, the trailing edge chuck 36 holds and holds the trailing edge of the printing plate 12 with the rotating drum 16.

In the exposure section 14, when the front end and the rear end of the printing plate 12 are held by the rotating drum 16, the squeeze roller 30
Separate. After that, in the exposure unit 14, the rotary drum 1
While rotating 6 at a predetermined rotation speed at high speed, the recording head unit 37 irradiates a light beam modulated based on image data in synchronization with the rotation of the rotating drum 16. As a result, the printing plate 12 is scanned and exposed based on the image data.

In the exposure unit 14, when the scanning exposure of the printing plate 12 is completed, the rotary drum 16 is moved to the position where the rear end chuck 36 holding the rear end of the printing plate 12 faces the rear end chuck attaching / detaching unit 32. Pause the rotating drum 16
Then, the rear end chuck 36 is removed. As a result, the trailing edge of the printing plate 12 is opened.

After that, the rotary drum 16 is rotated in the take-out direction of the printing plate 12, so that the printing plate 12 is discharged from the rear end side to the plate discharge guide 22 of the transport guide unit 18 along the tangential direction of the rotary drum 16. After that, it is conveyed to the developing device in the next step. (Structure of the single-wafer transporting unit) As shown in FIGS. 1 and 2, the single-wafer transporting unit 15 has a plurality of cassettes 38 that are parallel to the apparatus installation surface stacked and ended. Is provided. In the present embodiment, the cassette 38 has a three-stage structure, but the number of stages is not limited.

A transport unit 42 for transporting the printing plate 12 from the cassette 38 and transporting it to the exposure unit 14 is provided above the cassette housing unit 40. (Cassette and cassette withdrawal mechanism)
As shown in FIG. 3, the printing plates 12 are alternately stacked with thin film-like interleaving papers 44 for protecting the image forming layers of the printing plates 12. Further, the printing plate 12 is laminated with the image forming layer facing downward (on the installation surface side).

The respective printing plates 12 of different sizes are accommodated in the respective cassettes 38, and the printing plates 12 of the designated size can be sent to the exposure section 14.

Here, the cassettes 38 other than the lowermost cassette are independently movable horizontally. That is, as shown in FIG.
Are supported by the slide base 110. Support rollers 112 are attached to both ends of the slide base 110 in a direction (width direction) orthogonal to the slide direction via shafts 114, and are supported on rails 116. As a result, the slide base 110 moves (slides) on the rail 116 with almost no frictional resistance.
can do.

The bracket 1 is attached to the upper surface of the slide base 110 where the support roller 112 is attached.
A pair of width guide rollers 120 are attached via 18. The pair of width guide rollers 120 are housed in a substantially U-shaped guide portion 122 provided upright from the rails 116 and guide the width direction of the slide base 110 during movement. The rail 116 extends to the cassette retreat space portion 48 provided adjacent to the right side of FIG. 1, and the unnecessary cassette 38 is horizontally moved along the rail 116. That is, when the printing plate 12 of the selected size is accommodated in the lowermost cassette 38, the uppermost and second uppermost cassettes 38 are provided.
Is horizontally moved to the cassette evacuation space 48 (see the phantom line in FIG. 1 and the solid line in FIG. 11). The cassette evacuation space portion 48 may be configured only with a framework made of steel material, or a part or all of the six surfaces may be covered with steel sheet material.

That is, the present embodiment is characterized in that the necessary cassette 38 is constructed so as not to move at all.

Further, an interleaving paper storage box 49 for accommodating the interleaving paper 44 discharged from the inside of the apparatus is provided above the cassette retreat space portion 48, and a slit hole 51 provided in the wall surface of the adjacent apparatus. The interleaving paper 44 discharged from is received. (Conveyance Unit) A conveyance unit 42 is arranged above the cassette housing section 40.

The carrying unit 42 has a pair of guide rails 50 along the carrying direction of the printing plate 12 (left and right direction in FIG. 1).
Is equipped with. The distance between the pair of guide rails 50 is
The width of the printing plate 12 is equal to or larger than the width of the printing plate 12.
It is possible to pass between the pair of guide rails 50.

A rack (tooth shape) 52 is formed on the upper surface of each guide rail 50, and a pinion (gear) is formed.
54 meshes. The rotating shaft 56 of this pinion 54
A rotary moving body 58 coaxial with the pinion 54 is attached to the. Hereinafter, the structure around the rotary moving body 58 will be described. However, since the rotary moving bodies 58 provided in the pair of racks 52 have the same configuration, only one will be described and the description of the other will be omitted.

A speed reducing mechanism (not shown) set to a predetermined speed reducing ratio is provided between the rotary moving body 58 and the rotary shaft 56, and the pinion 54 moves between both ends of the rack 52. While moving, the rotary moving body 58 has a structure of rotating about 180 °.

A guide rod 62 is projected from the rotary moving body 58 in the radial direction, and the bracket 6 is attached to the guide rod 62.
4 has been inserted. Thereby, the bracket 64 is
It is movable in the radial direction of the rotary moving body 58. Also,
A compression coil spring 66 is attached to the guide rod 62,
The bracket 64 is urged in a direction away from the rotary moving body 58.

As shown in FIG. 4, one end of the belt 68 (or wire) is locked to the upper end of the left side surface of the bracket 64. The belt 68 is reversed from the engaging portion at the lower end portion of the bracket 64, wound around the rotation moving body 58, and then disposed along the guide rail 50 to the exposure portion 14 side.

A pulley 70 is disposed below the guide rail 50 near the end of the guide rail 50 on the side of the exposure section 14. The belt 68 is wound around the pulley 70 and then a reel 76 mounted on a rotating shaft of a motor 72. It is wound in layers.

The rotary moving body 58 is shown in FIG.
When the belt 68 is wound around the reel 76 by the driving force of the motor 72 in the vicinity of the right end of the, the pinion 54 is rotationally moved along the rack 52 in accordance with the rotational force applied to the rotary moving body 58. To do.

The rotation of the pinion 54 is performed by the rotary moving body 5
The rotational movement body 58 is rotated in the counterclockwise direction in FIG. 1 while being moved along the guide rail 50 by the tensile force, because the rotational movement is increased with respect to the rotation of 8 and transmitted.
Further, as the rotary moving body 58 moves to the vicinity of the left end portion of the guide rail 50 in FIG. 1 while rotating, the bracket 64 moves counterclockwise from the state in which the bracket 64 is located downward. Rotating 180 °, rotating moving body 58
Move until it is located above.

As shown in FIG. 5, a torsion coil spring 78 is attached to the rotary moving body 58, one end of which is fixed to the rotary moving body 58 itself, and the other end of which is tangential to the rotary moving body 58. Is projected in the direction. The other end of the torsion coil spring 78 comes into contact with the guide rail 50 after the bracket 64 has rotated approximately 90 ° from the downward state, and thereafter, the rotary moving body 58 is rotated clockwise in FIG. Urge to. This is in a direction to repel the winding of the belt 68 by the driving force of the motor 72.

As a result, the driving force of the motor 72 causes
When the belt 68 is unwound from the reel 76, the bracket 64 and the rotary moving body 5 are urged by the urging force of the torsion coil spring 78.
8 rotates clockwise in FIG.

When the unwinding of the belt 68 from the reel 76 is continued, the rotation of the rotary moving body 58 is continued due to the weight of the bracket 64.
Since the rotation moving body 58 and the bracket 64 rotate 180 degrees, the guide rail 5 rotates.
0 near the right end of FIG.

When the unwinding of the belt 68 from the reel 76 is further continued, the rotary moving body 58 and the bracket 64 are
The tension of the belt 68, which was in contact with and against the biasing force of the compression coil spring 66, is relaxed, and the bracket 64 descends along the guide rod 62. That is, the height of the cassette 38 at each stage can be adjusted by the looseness of the belt 68 (see FIG. 4).

As shown in FIG. 2, a suction cup unit 80 is stretched between the brackets 64 provided on the pair of rotary moving bodies 58.

The suction cup unit 80 includes a substantially U-shaped suction cup bracket 81 having an upper opening, and the suction cup bracket 81.
A plurality of (nine in the present embodiment) suction cups 82 provided in a row along the width direction of the printing plate 12 on the lower surface of the printing plate 12, and a plurality of suction cups 82 for sucking air to give suction force. (3 systems in this embodiment) air suction pipe 84,
It is composed of.

One end of the air suction pipe 84 is branched so as to correspond to the three suction cups 82, and a magnet pump 86 is attached to the other end.

A solenoid valve 88 and a negative pressure sensor 90 are provided in the middle of the air suction pipe 84.

The suction cup 82 faces the printing plate 12 housed in the cassette 38, and the belt 68 is driven by the motor 72.
When the reel 76 is unwound and the bracket 64 is separated from the rotary moving body 58, the upper surface (back surface) of the printing plate 12
In the vicinity of the right end of FIG.

Here, the position (axis) of the suction cup 82 is always constant, but since the unnecessary cassette 38 is retracted to the cassette retreat space portion 48, the required cassette 38 that is always selected is stored in the suction cup 82. They can face each other.

By operating the magnet pump 86 in this close contact state, the suction cup 82 has a suction force and is in close contact. This contact state is determined by the negative pressure sensor 9
The signal from 0 can be detected, and when the close contact is detected, the electromagnetic valve 88 is closed to maintain the close contact force.

When the bracket 64 is raised while being in close contact with the printing plate 12, the uppermost printing plate 12 can be lifted up into individual sheets.

A separating plate 92 is attached to the two corners of the right end of FIG. 1 of the cassette 38. The separating plate 92 is provided at a position that interferes with the movement trajectory of the printing plate 12 when the printing plate 12 is separated. That is, the printing plate 12
Is lifted, both corners of the printing plate 12 are prevented from moving, and the printing plate 12 bends in the width direction (see FIG. 6).
(See (A)). Due to this curvature, the separability from the lower interleaving paper 44 or the printing plate 12 is improved, and when the uppermost printing plate 12 gets over the separating plate 92, the uppermost printing plate 1
Only two can be separated (see FIG. 6 (B)).

As shown in FIG. 1, an arc-shaped guide plate 94 is attached to the bracket 64. This guide plate 94 corresponds to 1/4 yen (or 1/4 yen).
When the suction cup 82 attracts the printing plate 12, as the bracket 64 rotates 180 ° around the rotary moving body 58, the printing plate 12
It functions as a guide surface that winds up while winding (see the chain line in Fig. 1). (Slip-sheet Exclusion Mechanism Section) As shown in FIGS. 7 and 8, a slip-sheet elimination mechanism section 46 is provided on the right inner surface of the transport unit 42 in the sheet transport section 15.

The interleaving paper removing mechanism portion 46 includes a supporting portion 150.
And an operation unit 152. Support part 150
Is a top plate 154 that is vertically movably connected to the inner surface of the transport unit 42, and a pair of parallel guide plates, one end of which is connected to the bottom surface of the top plate 154 and the other end of which is hung downward. 156 and.

The operating portion 1 is provided between the pair of guide plates 156.
An elevating plate 158 forming a part of 52 is arranged. The elevating plate 158 is formed by bending a thin plate material into a substantially L shape, and the orientation of the main surface (vertical wall surface) thereof is rotated by approximately 90 ° with respect to the pair of guide plates 156 (approximately 9 in plan view).
It has been rotated by 0 °).

A plurality of roller pairs 160 are attached to the surface sides of the pair of guide plates 156 facing each other, and the widthwise ends of the elevating plate 158 are sandwiched between the roller pairs 160. There is. This allows
The elevating plate 158 is guided by the roller pair 160 and is held so as to be freely movable in the vertical direction with respect to the guide plate 156. That is, in the free state, the lifting plate 158 moves downward by its own weight.

At this time, the bent upper horizontal plane portion 158A of the lifting plate 158 serves as a stopper, and the horizontal plane portion 158A contacts the uppermost roller pair 160,
The amount of descent is limited.

A pair of holding members 162, 164 which are bent in a substantially U-shape and constitute the operating portion 152 together with the lifting plate 158 are attached to the lifting plate 158. The one holding member 162 is used for the lifting plate 15
The main surface (vertical wall surface) 158B of No. 8 is closely fixed. Further, the other holding member 164 is the same as the one holding member 16 described above.
It is rotatably connected to the upper end portion of 2 through a shaft 166. The other holding member 164 is bent in a substantially V shape at the longitudinal middle portion.

A torsion coil spring 16 is attached to the shaft 166.
8 is attached to this torsion coil spring 168.
The pair of sandwiching members 162, 164 relatively rotate in the direction (spreading direction) away from each other by the urging force of, and a predetermined spreading angle that balances the urging force and the rotating force due to its own weight, or is limited by a stopper (not shown). It is held at the predetermined spread angle (states of FIGS. 7A and 7B).

Knob members 170 are attached to the lower ends of the holding members 162 and 164, respectively. The knob member 170 has a rectangular block shape, is a relatively soft (low hardness) member such as synthetic resin or rubber, and requires at least a lower end surface to have a predetermined frictional force.

The knob member 170 has a function of pinching the interleaving paper 44 laid on the surface of the printing plate 12.

A pressing member 172 is attached to the lower surface of the top plate 154 corresponding to the other holding member 164. The pressing member 172 is the other holding member 16
It hangs toward the back side of 4, and at its lowermost end,
A roller 174 is attached. The roller has a structure in which when the top plate 154 and the pair of holding members 162, 164 relatively move (approach to each other), the roller comes into contact with the other holding member 164.

When the relative movement continues further in the same direction (approaching direction) from the abutting state, the friction force is reduced by the roller 174, so that the movement continues smoothly and the pressing force of the pressing member 172 is increased. , The torsion coil spring 1
As a result of the urging force of 68, the other holding member 164 rotates about the shaft 166 toward the one holding member 162 (FIGS. 7A and 7B are states immediately before the start of relative movement). This relative movement is performed when the top plate 154 descends from the lift plate 158 (state at the lowest position) free of the top plate 154.
This occurs when 70 abuts the surface of the slip sheet 44 and the lowering of the elevating plate 158 is blocked.

When the top plate 154 is further lowered in this state, the pressing member 172 exerts a pressing force on the other holding member 164, and the other holding member 164 approaches the one holding member 162 in the direction of the shaft 166. The interleaving paper 44 is made to follow by frictional force during the rotation around the center. At this time, since the one sandwiching member 162 contacts the interleaving paper 44 to prevent the interleaving paper 44 from moving, the interleaving paper 44 is loosened by the amount of the follow-up. The knob member 170 attached to the other holding member 164 is capable of expanding and contracting to some extent by the biasing force (see arrow C in FIG. 8B). By sandwiching this slack with a pair of knob members 170, the interleaving paper 4
4 can be held (FIG. 8).
(States of (A) and (B)).

The pair of guide plates 156 are provided with a shaft 176 in a space opposite to the surface of the elevating plate 158 to which the one holding member 162 is attached.
Have been passed over. The shaft 176 has a lock lever 17
8 is rotatably attached. Lock lever 17
8 has a horizontal surface portion 15 of the elevating plate 158 at one end.
8A fixed tension coil spring 180 (FIGS. 7 and 8).
Both of them are attached (see (B)) and are normally held in a substantially horizontal state when viewed from the front of FIG. 7 (B). The left end of the lock lever 178 in FIG. 7B has an enlarged wall thickness, and the circular arc surface portion 178A and the flat surface portion 17 are provided on the outer peripheral surface thereof.
8B is formed, and in the state of FIG. 7, the flat surface portion 178B faces the elevating plate 158.

Here, the lifting plate 158 is the top plate 154.
When the lock lever 178 is moved relative to the lock lever 178, the lock lever 178 is slightly rotated counterclockwise in FIG. 7B by the biasing force of the tension coil spring 180, and the circular arc surface portion 178A contacts the elevating plate 158. After that, the frictional force with the lifting plate 158 causes the shaft 176 to rotate in the counterclockwise direction in FIG. 7B as a center, and the circular arc surface portion 178A is reached at the time of the rightward rising state as shown in FIG. 8B. Lift plate 158
Come into contact with.

This circular arc surface portion 178A is used for the lifting plate 15.
8 is in a so-called locked state, and it is possible to maintain the current relative positional relationship between the top plate 154 and the elevating plate 158 (the state in which the pair of knob members 170 are in contact). There is.

When the top plate 154 rises in this state, it rises while holding the interleaf sheet 44 by the pair of knob members 170, so that the interleaf sheet 44 can be picked up. This movement is performed only when the uppermost layer of the cassette 38 is the interleaf paper 44, and when the uppermost layer is the printing plate 12, the top plate 154 is not lowered.

The lock release pin 182 (see FIG. 1) is shown on the movement locus of the lock lever 178 when the top plate 154 is raised.
When the top plate 154 is lifted by a predetermined amount, the lock lever 178 comes into contact with the lock release pin 180 and its movement is blocked, so that the lock lever 178 moves around the shaft 176 as shown in FIG. It will rotate in the clockwise direction of B). As a result, the flat portion 178B again faces the elevating plate 158 and the contact state is released, so that the biasing force of the tension coil spring 180 is restored, and the lock lever 1 is released.
78 can be maintained in a substantially horizontal state.

Before the top plate 154 is raised by a predetermined amount, as shown in FIG. 9, the ends of the interleaf paper 44 are sandwiched by the pair of rollers 106, and the rise is made at this position. It is controlled to stop once.

That is, as shown in FIG. 9, while the lifting plate 158 is being lifted, the interleaving paper 44 picked up is inserted.
A pair of rollers 106 for sandwiching is provided. Of the roller pair 106, the lower roller 106A is the upper roller 10A.
6B is capable of approaching and separating, and is normally in a separated state, and approaches the upper roller 106B when the picked-up interleaving paper 44 contacts the upper roller. Accordingly, the interleaving paper 44 can be held by the roller pair 106.

The roller pair 106 is rotated by the driving force of the driving means, and ejects the slip sheet 44 into the slip sheet storage box 49 (see FIG. 1) provided on the upper surface of the cassette retreat space portion 48. .

The operation of this embodiment will be described below with reference to the flowchart of FIG.

First, in step 200, initial setting of each unit is executed. That is, the suction cup unit 80 is set to the left end portion (on the exposure unit 14 side) of the guide rail 50 in FIG. 1, and the plate feed guide 20 of the transport guide unit 18 of the exposure unit 14 is associated with the puncher 24.

At the next step 202, the size of the printing plate 12 to be processed is read, and then at step 20.
In step 4, the cassette 38 accommodating the size read in 4 is recognized.

At step 206, the cassettes 38 other than the recognized cassette 38, that is, unnecessary cassettes are horizontally moved to be retracted. For example, if the required cassette 38 is at the top, it is not necessary to evacuate (Fig. 11).
And FIG. 12). When the required cassette 38 is the third stage from the top, the uppermost and second stage cassettes 38 are horizontally moved to the cassette retreat space portion 48 provided in the exposure unit 14 and retracted. As a result, the required cassette 38 can be placed at the top.

In the next step 208, it is determined whether the uppermost layer is the interleaf sheet 44 or the printing plate 12 in the required cassette 38 accommodated state. This may be detected in a non-contact manner by using a reflection type sensor (not shown) or the like, or may be detected by a contact type sensor by a difference in conductivity.

If an affirmative decision is made in step 208, the uppermost layer is a slip sheet, so that the operation proceeds to step 210 and the operation of removing this slip sheet 44 is started. That is, as the operation control, the descent of the interleaf paper removal mechanism portion 46 is started in step 210, and the descent is stopped when it is determined that the predetermined amount (L ₁ ) is lowered in step 212 (step 214).
Up to this point, the operation is for holding the slip sheet, and during this operation, the slip sheet removing mechanism unit 46 performs the following operation. The knob member 170 at the tip of the elevating plate 158 contacts the interleaf paper 44, and the supporting portion 150 moves relative to the operating portion 152 by the rotation pressing plate 172 of the lock lever 178. The shaft 166 of the other holding member 164 is centered. Rotation (approaching one of the sandwiching members 162) The interleaving paper 44 is loosened by the knob member 170 and held by the lock lever 178 in the sandwiching and sandwiching state. Then, in step 215, the interleaving paper removing mechanism portion 46 starts to rise, and At 216, when it is determined that the predetermined amount (a slightly smaller amount L ₂ than the moving amount L ₁ at the time of lowering) is increased, the increase is temporarily stopped (step 21
7). In this state, in step 218, the interleaving paper 44 is delivered to the roller pair 106.

That is, the interleaving paper 44 sandwiched between the knob members 170 is the roller 106B above the roller pair 106.
It is located on the lower side of (fixed arrangement) and the lower roller 10
6A (movable) moves the upper roller 106 by rotating the arm.
Approach B. As a result, the interleaving paper 44 becomes the roller pair 1
It will be sandwiched between 06.

Next, when the driving of the roller pair 106 is started,
The slip sheet 44 is conveyed to the outside of the apparatus and discharged into the slip sheet storage box 49 (step 219).

Further, in step 220, the driving of the pair of rollers 106 is started (discharge of the slip sheet 44) in step 219, and the raising of the slip sheet excluding mechanism portion 46 is restarted almost at the same time.
Return to the original position, and proceed to step 224.

The lock lever 178 contacts the release pin 182 when the interleaving paper sheet removal mechanism 46 is raised again.
As a result, the lock lever 178 rotates about the shaft 176, the surface facing the elevating plate 158 moves from the arc surface 178A to the flat surface 178B, and the holding of the elevating plate 158 is released. As a result, the elevating plate 158 moves to the lowest end due to its own weight. This is a relative movement between the support part 150 and the operating part 152, and the pressing of the elevating plate 158 by the pressing plate 172 is also released. Therefore, the pair of clamping members 162, 164 is subjected to a predetermined force by the torsion coil spring 168. Spread to the angle, interleaving paper 4
Release the clamp of 4.

The step 224 moves to a case where the negative judgment is made in the step 208, that is, when the uppermost layer of the cassette 38 is the printing plate 12. After step 224, the sheet-fed operation of the printing plate 12 is performed.

At step 224, the unwinding of the belt 68 is started. Immediately after the paper 44 is removed,
Since the bracket 64 is located at the right end of the guide rail 50, the bracket 64 separates (falls) downward from the rotary moving body 58 immediately after the start of the unwinding of the belt 68.

At the next step 226, the magnet pump 86 is driven, and then at step 228, the negative pressure sensor 9 is driven.
At 0, it is determined whether or not a predetermined negative pressure is detected. That is, as the bracket 64 descends, the suction cup 82 approaches the printing plate 12, and the suction surface of the suction cup 82 moves toward the printing plate 12.
By contacting the upper surface (non-image forming surface) of the suction plate 82, the inside of the pipe of the suction cup 82 becomes a negative pressure and the printing plate 12 can be sucked.

When it is determined in step 228 that the negative pressure is detected, the process proceeds to step 230 and the unwinding of the belt 68 is stopped. This is a state in which the suction cup 82 is in close contact with the printing plate 12, and in the next step 232, the belt 6
Rewind 8.

The unwinding of the belt 68 raises the bracket 64 so as to approach the rotary moving body 58, so that the uppermost printing plate 12 is also raised.

Here, a separating plate 92 is attached to both corners of the right end portion of the cassette 38 in FIG. 1, and is located at a position where it interferes with the upward movement locus of the printing plate 12. Therefore, the width direction of the printing plate 12 lifted by the suction cups 82 (see FIG.
The left and right direction) is curved at the center. Due to this curvature, an air layer is provided between the lower layer and the lower layer, and the separability from the lower layer is improved.

Therefore, after getting over the separating plate 92,
Only the uppermost printing plate 12 will be lifted by the suction cup 82.

Since the lifted printing plate 12 is in a cantilever state, it is gradually turned up from the right end side in FIG. 1, and when the rewinding of the belt 68 is continued, the bracket 64 is moved counterclockwise in FIG. Start rotating in the direction of rotation. Along with this, the pinion 54 rotates while meshing with the rack 52, so that the rotary moving body 58 and the bracket 64 horizontally move toward the left end portion of the guide rail 50.

During this horizontal movement, the suction cup 82 changes from the downward state to the upward state, and the printing plate 12 is turned upside down. Note that, at the time of this reversal, since it is supported by the arc-shaped guide plate 94, the entire load is not applied to the suction cup 82, and it is not necessary to increase the suction force of the suction cup 82 more than necessary.

Further, the printing plate 12 of about half the size on the end portion side sucked by the suction cups 82 is reversed with substantially the same movement locus,
The remaining printing plate 12 in the latter half is in a hanging state.

In this state, the leading edge of the printing plate 12 (because it has been inverted, becomes the left end in FIG. 1), the conveying roller 108.
The sheet is sandwiched by the sheets, is delivered to the guide plate 109 of the exposure section 14 (step 234), and is fed to the plate feed guide 20 in the transport guide unit 18 of the exposure section 14.

Next, at step 236, the plate feeding guide 20
Corresponds to the puncher 24, the leading edge of the printing plate 12 is sent to the puncher 24, punching is performed, and then the printing plate 12 is returned to the plate feeding guide 20.

Next, at step 238, the transport guide unit 18 is switched to make the plate feed guide 20 correspond to the rotary drum 16. As a result, the printing plate 12 can be fed to the rotary drum 16 in the tangential direction of the rotary drum 16.

The printing plate 12 fed in is tightly wound around the peripheral surface of the rotary drum 16 by the front end chuck 26 and the rear end chuck 36 (step 240), and the positioning for exposure is completed.

At the next step 242, the image data is read and the exposure process is started by the light beam from the recording head section 37 (step 244). In the exposure process, the recording head unit 37 is moved in the axial direction of the rotary drum 16 while rotating the rotary drum 16 at high speed (main scanning).
This is so-called scanning exposure.

When the exposure processing in step 244 is completed, the process proceeds to step 246 and the transport guide unit 1
8 (switching the plate discharge guide 22 to the rotary drum 16), and then in step 248, the rotary drum 1
The printing plate 12 wound around 6 is discharged from the tangential direction. At this time, the printing plate 12 is sent to the plate discharge guide 22.

When the printing plate 12 is sent to the plate ejection guide 22, the process proceeds to the next step 250, the conveyance guide unit 18 is switched, the plate ejection guide 22 is made to correspond to the ejection port, and then the printing plate 12 is ejected in step 252. Let
A developing unit is provided in the discharging direction, and the printing plate 1
2 is continuously developed.

According to the above embodiment, the cassettes 38 other than the lowermost cassette are independently supported by the slide base 110, and the slide base 110 is moved on the rail 116 with almost no frictional resistance. The structure is made to slide. Further, the rail 116 is shown in FIG.
Since the cassette 38 is extended to the cassette retreat space portion 48 provided adjacent to the right side of the above, and the unnecessary cassette 38 is horizontally moved along the rail 116, the required cassette 3
No. 8 does not move at all, and single-wafering is possible at the reference position. As a result, it is not necessary to make a space for each sheet for each cassette, and it is not necessary to move the sheet-fed apparatus to the arrangement position of the cassette.

Further, in the interleaf sheet excluding mechanism according to the present embodiment, when the uppermost layer is the interleaf sheet, the interleaving sheet excluding mechanism portion 46 starts to descend. By this descending, the interleaving paper 44 is slackened and pinched by the knob member 170 in a so-called mechanically interlocked manner, and the holding state of the sandwiched state by the lock lever 178 is continuously executed. After that, the interleaving paper removing mechanism 46 is started to move up and the interleaving paper 44 is delivered to the roller pair 106, so that it is not necessary to monitor the sandwiching state of the interleaving paper 44 by a sensor or the like, and the number of parts is reduced. The control system can be reduced.

[0110]

As described above, according to the present invention, it is not necessary to monitor whether the interleaving paper is pinched or not when eliminating the interleaving paper which is required in accordance with the sheet of the printing plate. This has the excellent effect that the interleaving paper can be reliably picked up by only the operation of.

[Brief description of drawings]

FIG. 1 is a schematic diagram of a printing plate automatic exposure apparatus according to the present embodiment.

FIG. 2 is a right side view of FIG.

FIG. 3 is an enlarged view showing a superposition structure of a printing plate and a slip sheet housed in a cassette.

FIG. 4 is a front view showing a state in which a rotary moving body, which is an elevating mechanism portion of a suction cup unit, and a bracket are connected.

FIG. 5 is a front view showing a moving state of a rotary moving body and a bracket.

FIG. 6 is a right side view of the cassette showing a procedure of carrying out a printing plate by a separating plate.

FIG. 7A is a perspective view showing a standby state of the interleaf paper removal mechanism portion, and FIG. 7B is a front view thereof.

FIG. 8A is a perspective view showing a slip sheet holding state of a slip sheet excluding mechanism portion, and FIG. 8B is a front view thereof.

FIG. 9 is a front view showing a discharge state of interleaving paper by driving a pair of rollers.

FIG. 10 is a flowchart showing the flow of processing of the printing plate automatic exposure apparatus according to the present embodiment.

FIG. 11 is a front view of the printing plate automatic exposure device corresponding to FIG. 1 when the printing plate is taken out from the cassette at the lowermost stage (third stage).

FIG. 12 is a right side view of FIG. 11.

FIG. 13 (A) is a front view showing a cassette retracting mechanism,
FIG. 13B is a right side view of FIG.

[Explanation of symbols]

10 Automatic printing plate exposure device 12 printing plates 15 Sheet-fed transport unit (printing sheet-fed transport device) 38 cassettes 40 cassette storage 42 Transport unit 44 interleaf paper 46 interleaving mechanism 48 cassette evacuation space 50 guide rails 80 sucker unit 82 sucker 150 support 152 Operation unit 158 Lift Plate 162 clamping member (one member) 164 Clamping member (other member) 168 torsion coil spring 170 knob member 172 Pressing member 178 Lock lever (blocking means)

Claims (2)

[Claims] 1. A printing method in which thin printing sheets for protecting a printing plate and printing plates are alternately stacked and accommodated in a cassette, and the printing plates are sequentially separated and conveyed to the next step. Used in a plate sheet conveying device, an interleaf sheet excluding mechanism for excluding the interleaf sheet prior to the sheet of the printing plate, which is arranged to face the interleaf sheet, and with respect to the interleaf sheet. A support part that moves so as to be able to approach and separate, and an operation part that is attached to the support part so as to be relatively movable in the moving direction of the support part. The other member has a pair of sandwiching members that are fixedly arranged so as to be able to approach and separate from at least one of them in an arcuate trajectory, and the relative movement between the support member and the operating portion is such that the one sandwiching member is It starts when it touches the interleaving paper surface, and it uses this relative movement force. The other sandwiching member is moved in an arcuate trajectory, and the interleaving paper is slid with respect to the printing plate surface along with this arcuate trajectory to be loosened, and the loosened portion is sandwiched by one sandwiching member. Interleaving paper removal mechanism for printing plate sheet feeding device. 2. A predetermined amount of the support portion, which is provided in the support portion, operates in association with relative movement with the operation portion in the approaching direction to the slip sheet, and is in a direction opposite to the relative movement direction. 2. The printing plate sheet conveying apparatus according to claim 1, further comprising a blocking unit that maintains a sandwiched state of the interleaf sheet by the pair of sandwiching members by inhibiting relative movement of the operation unit during the movement. Interleaving paper removal mechanism.