JP2000289874A - Printing plate carrier device and plate material printing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent attachment of a printing plate on a printing surface plate at the time of carrying the printing plate in an overhung state. SOLUTION: An air nozzle 142 to blow out air toward a ground side lower surface of a printing plate to be held in an overhung state by a carrier as it is adsorbed by a suction cup is provided with the suction cup 124 to adsorb an end part of a top side in the vertical direction of a printing plate P on the carrier of a carrier device, and air is blown out from the air nozzle at the time of carrying the printing plate by adsorbing and holding it by the suction cup on the carrier device. Consequently, an air layer is formed between the printing plate and a printing surface plate at the time when the printing plate moves on the printing surface plate, and it is possible to smoothly carry the printing plate without attaching it on the printing surface plate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing plate transport device for transporting a printing plate in a cantilever state, and a printing plate printing device for printing an image on a printing plate placed on a surface plate.

[0002]

2. Description of the Related Art In a newspaper printing or the like, a photosensitive lithographic printing plate (hereinafter referred to as a "lithographic printing plate") having a thin plate made of aluminum or the like having a thickness of about 0.3 mm as a support and having a photosensitive layer formed on one surface of the support. An image recorded on an original film is printed on a printing plate by a printing plate printing apparatus.

In such a printing plate printing apparatus, a printing plate is placed on a printing platen, and an image recorded on an original film closely attached to the printing plate is provided above the printing platen. The printing plate is exposed in close contact with light emitted from a light source.

In general, in a printing plate printing apparatus, when a printing plate is transported, a suction plate sucks the printing plate and transports the printing plate in a substantially horizontal state.

A light source for exposure is provided above the printing platen, and a negative film to be placed on the printing plate and an overlay sheet covering the negative film are provided. It is difficult to secure a moving space for the mechanism for transporting the film onto the printing platen. For this reason, a transport device has been studied in which the end of the printing plate is sucked and held in a cantilevered state, and the printing plate is inserted so as to slide on a printing platen.

[0006] However, the surface of the printing plate is extremely smooth in order to bring the printing plate into close contact, and when the printing plate is slid on the printing plate, the printing plate adheres to the surface of the printing plate. As a result, there is a problem that a transport failure occurs.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and prevents a printing plate from sticking to the surface of a surface plate when the printing plate is transported in a cantilever state. It is an object of the present invention to propose a printing plate transport device and a printing plate printing device that can smoothly transport the printing plate.

[0008]

A printing plate transport device according to the present invention is a printing plate transport device for supporting one end of a printing plate and transporting the printing plate on a platen, wherein one end of the printing plate is sucked. Suction means for moving the printing plate by moving the suction means, which has sucked one end of the printing plate, in a predetermined direction, and provided integrally with the suction means; Air supply means for ejecting and supplying air toward the lower surface side of the printing plate sucked by the means.

According to the present invention, when one end of the printing plate is sucked and held by the suction means and transported in a cantilever state, air is supplied to the lower surface side of the printing plate by the air supply means.

Accordingly, when the printing plate moves on the surface plate, an air layer is generated between the surface plate and the printing plate, and it is possible to prevent the printing plate from sticking to the surface plate. Further, since the air layer is formed between the printing plate and the surface plate, the printing plate can move smoothly on the surface plate.

[0011] The printing plate printing apparatus of the present invention is provided with conveying means for adsorbing and holding one end of the printing plate, lifting the printing plate, and conveying the printing plate on the platen. A printing material printing apparatus for printing an image recorded on an original film by contact exposure, the printing plate or the original film being sucked and held on the printing platen at the time of image printing; and By ejecting air supplied to the ejection holes formed on the surface plate from the ejection holes to above the surface plate, a space between the printing plate and the surface plate or between the original film and the surface plate is provided. A jetting means for releasing the close contact by the suction holding means, and a transport assisting means for operating the jetting means when the printing plate moves on the surface plate by the transporting means. .

According to the present invention, when the printing plate or the original film is taken out from the surface plate after the image printing by the close contact exposure, the jetting means is connected to the printing plate or the original film by the air jetted from the jetting hole. Release the contact with the surface plate.

On the other hand, when the printing plate is carried in a cantilever state by the carrying means, the carrying assist means supplies air to the ejection holes.

That is, air is blown out even when the printing plate is conveyed on the surface plate by using the air blowing holes provided for releasing the close contact between the printing plate or the original film and the surface plate. I do.

The air supplied to the ejection holes is ejected from the ejection holes onto the surface plate. At this time, when the printing plate moves on the surface plate, the air is ejected toward the lower surface of the printing plate. As a result, an air layer is generated between the printing plate and the printing platen, and the printing plate can be smoothly moved without sticking to the platen.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic configuration of a printing plate printing apparatus 10 applied to the present embodiment.

The printing plate printing apparatus 10 is provided with a film loading section 12, a sticking section 14, a standby section 18, and a printing section 20, which are temporarily positioned and loaded on a tray (not shown) of the film loading section 12. Original film (for example,
After the negative film (hereinafter referred to as “negative film N”) is sent to the sticking unit 14 and positioned in the sticking unit 14 based on a positioning index such as a punch hole or a register mark, the positioning and transport assistance is provided. Affixed to a negative bar 16 used as metal fittings. The negative film N affixed to the negative bar 16 passes through the standby unit 18 to the printing unit 20.
Sent to

The plate printing apparatus 10 includes a printing section 20.
The printing plate loading unit 24 and the temporary accumulating unit 42 are arranged with the photolithographic plate (hereinafter referred to as “printing plate P”).
The printing plate loading unit 24 has a printing plate mounting table (skid) 2
2 and loaded.

In the printing plate printing apparatus 10, the printing plate P is taken out from the skid 22, conveyed to the printing unit 20, and the printing plate P is positioned on the printing platen 20A of the printing unit 20. The negative film N is placed at a predetermined position on the plate P, and the image recorded on the negative film N by close contact exposure is printed on the printing plate P.

The printing plate P for which image printing has been completed is sent from the printing unit 20 to the temporary stacking unit 42. Further, the negative film N is transported to a discharge tray (not shown) above the attaching section 14. At the time of this transfer, the negative film N
Peeled from 6.

On the other hand, as shown in FIGS. 1 and 2A, the plate printing apparatus 10 has a 2L1W size in which images 32 of one page of a newspaper recorded on a negative film N can be vertically arranged and printed. Printing plate P1 (shown by a solid line in FIG. 1);
As shown in FIG. 1 and FIG. 2 (B), images 32 of one page of a newspaper are arranged vertically and horizontally, and a printing plate P2 of 2L2W size that can be printed (indicated by a two-dot chain line in FIG. 1) can be loaded. ing. The images of the negative film N are printed on the printing plates P1 and P2 such that the longitudinal direction is the vertical direction.

In the following, the direction of the longitudinal direction of the printing plate P with respect to the vertical direction of the negative film N is indicated by an arrow L direction, and the direction of the negative film N and the printing plate P with respect to the width direction is indicated by an arrow W direction.

As shown in FIG. 3, the printing plate loading unit 24
Is disposed in the machine frame 40 of the printing plate printing apparatus 10 adjacent to the printing section 20. As described above, the printing plate loading unit 2
4, a skid 22 (not shown in FIG. 3) in which a number of printing plates P are stacked is loaded. One end of the skid 22 in the width direction of the printing plate P (a direction orthogonal to the vertical direction)
It is positioned and loaded so as to be at a predetermined position on the printing section 20 side. As a result, the printing plate P1 is loaded at a position biased toward the printing unit 20 side. It should be noted that such a positioning of the skid 22 can be performed by a conventionally known method, and a detailed description is omitted in the present embodiment.

In the printing plate loading section 24, when the uppermost printing plate P is taken out of the skid 22 by a sheet mechanism (not shown), the printing plate P is placed on the conveyor 50. The printing plate P placed on the conveyor 50 is transported to the printing unit 20 by the transport device 100.

A pair of side plates 52 are attached to the conveyor 50, and sprockets 54 and 56 are provided at both ends of each side plate. This sprocket 5
A chain 58 is wound around the sprockets 4 and 56, and the chain 58 is also wound around a sprocket (not shown) provided below the sprocket 56 on the printing portion 20 side.

Between the chains 58, a conveyor 50 is provided.
Are supported.
Normally, the support bar 60 is retracted between the sprocket 56 on the printing section 20 side and a sprocket (not shown) below, so that a printing plate (not shown) is provided between the side plates 52 from above the skid 22 by a sheet feeding mechanism (not shown). P can be adsorbed and lifted.

The printing plate P can be placed between the support bars 60 by pulling out the support bar 60 between the side plates 52 and unfolding the printing plate P while lifting the printing plate P upward from the pair of side plates 52. It has become.

In the printing plate printing apparatus 10, when the printing plate P is lifted from the skid 22 and placed on the support bar 60 of the conveyor 50, the printing plate P is transferred to the printing unit 20 by the transfer device 100.

On the other hand, as shown in FIGS. 1 and 3, the printing unit 20 is provided with a printing platen 20A on which a printing plate P is placed when printing an image recorded on the negative film N. ing. The printing surface plate 20A is formed in a long rectangular flat plate shape, and is arranged so that the longitudinal direction is along the vertical direction of the negative film N. Also, this printing platen 20
A is large enough to mount a large-sized printing plate P2.

FIG. 7 shows a printing platen 20 A provided in the printing section 20. The printing surface plate 20A is provided with two positioning pins 70A and 70B at one end in the width direction which is a direction orthogonal to the vertical direction, and a positioning pin 72 at the ground side which is one end in the vertical direction. I have. The positioning pins 70A, 70B are arranged along the longitudinal direction of the printing platen 20A, and the positioning pins 70A, 70B, 72
Are normally accommodated in the printing surface plate 20A, but project from the round holes 74A, 74B, 74C to the upper surface of the printing surface plate 20A by the operation of a driving means such as an air cylinder (not shown).

The positioning plate 70 is provided on the printing platen 20A.
A, 70B, pusher pin 7
6A and 76B are provided, and pusher pins 78A and 78B are provided on the other end side in the width direction. In addition, baking surface plate 2
On 0A, a pusher pin 80 is provided on the top side in the top and bottom direction opposite to the positioning pin 72.

A pusher pin 76 is provided on the printing platen 20A.
Slots 82A and 82B corresponding to A and 76B, slots 84A and 84B corresponding to the pusher pins 78A and 78B, and slots 86 corresponding to the pusher pin 80 are formed. Pusher pins 76A, 76B, 78A, 7
8B, 80 are usually slots 82A, 82B, 84A, 8
4B and 86 respectively.

In the printing section 20, when the printing plate P is placed on the printing platen 20A, the positioning pins 70A, 70
B, 72, and pusher pins 76A, 76B and pusher pin 80 according to the size of the printing plate P.
Alternatively, the pusher pins 78A and 78B and the pusher pin 80
Is projected to the upper surface side of the printing platen 20A, the printing plate P is pressed toward the positioning pins 70A and 70B, and then pressed toward the positioning pin 72. Thereby, the printing plate P
Are brought into contact with the positioning pins 70A, 70B, 72 to position the printing plate P on the printing platen 20A.
The pusher pins 76A and 76B are used for positioning the printing plate P1, and the pusher pins 78A and 78B are used for positioning the printing plate P2.

In the printing platen 20A, suction grooves 2 for sucking the printing plate P1 are provided on the positioning pins 70A, 70B side in the width direction.
02 is formed in a rectangular shape, and suction grooves 204A and 204B used for suction of the printing plate P2 are formed on the side opposite to the positioning pins 70A and 70B with the suction groove 202 interposed therebetween. I have.

Printing plate P positioned on printing platen 20A
1 is held by suction by the negative pressure supplied to the suction groove 202, and the printing plate P2 is held by the suction groove 202 and the suction groove 2
It is adsorbed and held over substantially the entire area by the negative pressure supplied to the electrodes 04A and 204B.

A part of the positioning pins 70A and 70B is attached to the end of the printing platen 20A on the side of the positioning pins 70A and 70B.
A and 70B are formed so as to surround the suction grooves 206A and 206B, and between the suction grooves 206A and 206B.
C is formed. The baking surface plate 20A has a pair of suction grooves 208A, 208A so as to partially surround the long holes 82A, 82B between the suction grooves 202 and the suction grooves 204A, 204B.
208B are formed, and the suction grooves 210A and 210B are formed on the side of the long holes 84A and 84B on the side of the suction grooves 204A and 204B so as to partially surround the long holes 84A and 84B, respectively. And suction groove 210
A and 210B, the suction grooves 208C and 210
C is formed.

Further, on the baking surface plate 20A, suction grooves 212 are formed along the width direction at the top end in the top and bottom directions.
Adsorption grooves 214A, 214B, 214C are formed at the end on the ground side.

In the printing platen 20A, when the printing plate P1 is placed, the negative film N covering the printing plate P1 and the overlay sheet 72 are attached to the suction grooves 206A to 206C, 208.
A to 208C, 210A to 210C and the suction holding by the negative pressure supplied to the suction groove 212. In addition, baking surface plate 2
0A, when the printing plate P2 is placed and positioned, the negative film N is supplied by the negative pressure supplied to the suction grooves 206A to 206C, 210A to 210C and the suction groove 212.
And the overlay sheet 72 is held by suction. In addition, the suction groove 114 provided at the end on the ground side of the printing platen 20A.
A to 114C are mainly for sucking the negative bar 16 to which the negative film N is attached.

On the other hand, the sticking groove 202 is
A plurality of ejection holes 216A and 216B (hereinafter, collectively referred to as “ejection holes 216”) are formed in the interior surrounded by the suction grooves 204A and 204B.
A plurality of ejection holes 218A, 218B (hereinafter, collectively referred to as “ejection holes 218”) are formed on the top side and the ground side around 2, 204A, 204B. Also,
At both ends in the width direction of the printing platen 20A, ejection holes 220A and 220B (hereinafter, collectively referred to as “ejection holes 220”) are formed on the ground side and the top side. Spout hole 2
16A, 216B, 218A, 218B, 220A, 2
Each of 20B is opened obliquely toward the center of printing surface plate 20A.

The ejection hole 216 supplies air between the printing platen 20A and the printing plate P to promote separation of the printing plate P from the printing platen 20A.
8 is a negative film N and a printing plate P or a printing platen 20A.
Air is supplied during the discharge, and the ejection holes 220 are
Air is supplied between A and the overlay sheet to improve the separability of the negative film N or the overlay sheet.

As shown in FIG. 3, the printing unit 20 includes
A pair of rails 222 is arranged below the printing surface plate 20A. As shown in FIG. 8 to FIG.
22, the longitudinal direction is arranged along the vertical direction,
It is attached to the frame 46 of the printing plate printing apparatus 10.

Brackets 226 and 228 are attached to both ends of the printing platen 20A in the top and bottom directions, and rails 222 are attached to the brackets 226 and 228, respectively.
A slider 224 slidably engaged with the bracket 226 is mounted on the lower surface of each of the brackets 226, 228. Thus, the printing platen 20A is supported so as to be movable along the vertical direction which is the longitudinal direction of the rail 222.

An air cylinder 232 (not shown in FIGS. 8 to 10; see FIG. 11) is provided between the pair of rails 222.
The air cylinder 232 moves on a rail 222 by expanding and contracting a rod (not shown).

The bracket 2 on the ground side of the printing surface plate 20A
28, a block 236 is attached, and a rail 222 is provided with a stopper 23 facing the block 236.
8, 240 are attached. The baking surface plate 20A is
When the block 236 contacts the stopper 240 on the ground side, the top side of the printing plate P placed on the printing platen 20A faces the negative frame (not shown) holding the negative film N. ing. In addition, baking surface plate 20A
The printing plate P placed on the printing platen 20A by the block 236 contacting the stopper 238 on the top side.
Is opposed to a negative frame (not shown). In the printing unit 20, a position facing the negative frame (not shown) is a printing position.

As shown in FIG. 9, in the printing section 20,
When the printing plate P is placed on the printing platen 20A, the printing platen 2 is moved while moving the printing platen 20A to the ground side in the vertical direction.
The printing plate P placed on 0A is positioned, and the top side of the printing plate P is arranged at the image printing position to perform image printing. Thereafter, as shown in FIG. 10, in the printing unit 20, the printing platen 20A is moved to the top side in the top-to-bottom direction, so that the bottom side of the printing plate P is arranged at the image printing position.
Perform image printing.

FIG. 11 shows a part of the control section 260 for controlling the operation of the printing plate printing apparatus 10. This control unit 2
60 is provided with a controller 262 having a microcomputer.

An air cylinder 232 for moving the printing platen 20A in the vertical direction is provided with a solenoid valve 264.
A, 264B, and 264C, air is supplied from an air source 266.
4A to 264C are connected to the controller 262.

When the controller 262 moves the printing platen 20A from the top side to the bottom side in the up-down direction, the controller 262 controls the air cylinder 23 via the solenoid valves 264C and 264A.
Air is supplied to the extension side of the air cylinder 2 and the air is exhausted from the contraction side of the air cylinder 232 via the solenoid valves 264B and 264C, and the rod 232A is extended at a high speed. Thereafter, the controller 262 supplies air to the contraction side of the air cylinder 232 by communicating the solenoid valve 264B and the air source 266 at a predetermined timing,
The extension speed of the rod is reduced, and the printing platen 20A is stopped at a predetermined position by the stopper 240 while being decelerated.

Further, the controller 262 is a printing surface plate 2
When moving 0A from the ground side to the top side in the vertical direction, first, air is supplied to the contraction side of the air cylinder 232 via the solenoid valves 264C and 264B, and the air cylinder 232 is extended by the solenoid valves 264A and 264C. Exhaust air from the side. Thereafter, when the printing surface plate 20A reaches a predetermined position, the solenoid valve 26
Air is also supplied to the extension side of the air cylinder 232 by communicating the air source 4A with the air source 266, the contraction speed of the rod 232A is reduced, and the printing platen 20A is stopped by the stopper 238 while decelerating.

The controller 262 includes the above-described ejection holes 216A, 216B, 218A, 218B, 220
A, solenoid valve 268 for supplying air to 220B
A, 268B, 268C, 268D, 268E, 268
F is connected, and the solenoid valves 270A, 270A,
70B, 270C, 270D, 270E, 270F, 2
70G and 270H are connected.

The solenoid valve 270A is connected to the suction groove 20
Air is supplied to the vacuum ejector 272 connected to the suction groove 204A and the suction groove 204A.
Air is supplied to the vacuum ejector 272 which is connected to the 04B by a Z-connection.

The solenoid valves 270C and 270
D and 270E are suction grooves 206A, 208A and 210
A, suction grooves 206B, 208B, 210B, suction groove 20
Air is supplied to the vacuum ejector 272 which supplies a negative pressure to the solenoid valves 270, 208C and 210C.
F, 270G and 270H are the suction groove 212, the suction groove 21
Air is supplied to a vacuum ejector 272 that supplies a negative pressure to the suction grooves 4A and 214C and the suction groove 214B.

Further, the controller 262 includes solenoids 274A, 274B, 274C, 274D, 274
E, 274F and 274G are connected.

The solenoid valve 274A is provided with an air cylinder 27 for allowing the positioning pins 70A, 70B, 72 to protrude and retract.
6A, 276B, and 276C, and solenoid valves 274B and 274C are for operating an air cylinder 278A for extending and retracting the pusher pin 80 and an air cylinder 278B for moving the pusher pin 80 in the vertical direction.

Further, the solenoid valves 274D, 274
E is an air cylinder 280A, 280B for extending and retracting the pusher pins 76A, 76B, and the pusher pins 76A,
Air cylinder 282 that moves 76B along the width direction
A and 282B are operated, and the solenoid valves 274F and 274G are provided for the air cylinders 284A and 284B for extending and retracting the pusher pins 78A and 78B, and the air cylinders 286A and 286B for moving the pusher pins 78A and 78B in the width direction. It is for operation.

In the controller 262, these solenoid valves 264A to 264C, 268A to 268F,
By controlling 270A to 270H and 274A to 274H, the printing surface plate 20A is moved together with the movement of the printing surface plate 20A.
Positioning of the printing plate P on A, and promotion of suction holding and separation of the printing plate P, the negative film N, and the over receipt 72 are performed.

On the other hand, the printing plate P for which image printing has been completed is
The sheet is taken out from the printing platen 20A by the transfer device 100 and transferred to the temporary stacking unit 42. At the same time, printing unit 2
A new printing plate P is conveyed from the printing plate loading unit 24 onto the printing surface plate 20A of No. 0.

FIGS. 3 and 4 show a transport device 100 for transporting the printing plate P between the printing plate loading section 24, the printing section 20, and the temporary accumulating section 42. Transfer device 10
Numeral 0 includes a rail 102 disposed from the printing plate loading unit 24 to the temporary stacking unit 42. This rail 10
Reference numeral 2 is attached to an end of the printing plate printing apparatus 10 on the machine frame 40 side.

As shown in FIG.
, A plurality of sliders 104 are slidably mounted. The slider 104 is fixed to the lower surface of a band-shaped base body 106 whose longitudinal direction is arranged along the longitudinal direction of the rail 102.

An air cylinder 108 is arranged above the base body 106. This air cylinder 108
Are arranged along the rail 102 and drive block 11
Reference numeral 0 denotes a rodless cylinder that moves along the rail 102. The drive block 110 of the air cylinder 108 is connected to a longitudinally intermediate portion of the base body 106 via a bracket 110A (see FIG. 4).
Thus, when the air cylinder 108 is driven, the base body 106 moves above the end (top end) of the printing unit 20 along the rail 102. This base body 106
Carriers 116, 13 are provided at both ends along the longitudinal direction of
As shown in FIGS. 4 and 5 in which the air cylinder 112 is disposed, an air cylinder 112 is provided at the end of the base body 106 on the printing plate loading section 24 side, and bearings are provided on both sides of the air cylinder 112. 114 is attached. The distal end of the guide rod 120 inserted through the rod of the air cylinder 112 and the bearing 114 penetrates through the base body 106 and is connected to the base plate 118 of the carrier 116. Thus, when the air cylinder 112 is driven, the base plate 118 of the carrier 116 moves up and down while keeping the horizontal state.

The base plate 118 has a substantially L-shape in which an extending portion 122 is formed from the connecting portion of the air cylinder 112 to the printing plate loading portion 24 side. A suction cup 124 is provided. Carrier 11
The sucker 124 sucks and holds one end side (top side in the vertical direction) of the printing plate P in the longitudinal direction.

On the other hand, as shown in FIGS. 3 and 4, an air cylinder 126 and a bearing 128 are attached to the end of the base body 106 on the side of the temporary accumulating portion 42. The distal end of the guide rod 130 inserted into the rod of the air cylinder 126 and the bearing 128 penetrates through the base body 106 and is connected to the base plate 134 of the carrier 132. Thereby, the base plate 134 of the carrier 132 is
By driving the air cylinder 126, the air cylinder 126 moves up and down while maintaining a substantially horizontal state.

The base plate 134 is formed in a substantially rectangular flat plate shape, and is provided with a plurality of suction cups 136. The carrier 132 sucks and holds the printing plate P on which image printing has been completed by the suction cup 136.

As shown in FIG. 4, the air cylinder 10
Stoppers 138 and 140 are disposed near both ends of the drive rod 8 so as to face the drive rod 110.
The movement range of the drive block 110 of the air cylinder 108 is regulated by 38 and 140.

In the transport device 100, the drive block 110 of the air cylinder 108 is connected to the stopper 1 on the printing plate loading unit 24 side.
The carrier 116 is inserted into the printing plate loading unit 24 at a position where the printing plate P comes into contact with the printing plate 38, and the printing plate P taken out of the skid 22 can be sucked. The carrier 132 is located above the printing platen 20A, so that the printing plate P for which image printing has been completed can be attracted from the printing platen 20A.

On the other hand, in the plate feeding / discharging apparatus 100, when the drive block 110 of the air cylinder 108 comes into contact with the stopper 140 on the temporary accumulating section 42 side, the carrier 116 moves to the printing section 20, and the printing plate 20A on the printing platen 20A. The printing plate P can be placed at a predetermined position. Further, the carrier 132 is inserted into the temporary accumulating section 42, and the printing plate P taken out from the printing platen 20A can be transferred to the temporary accumulating section 42.

As shown in FIG. 3, the carriers 116,
The suction cups 124 and 136 provided on the 132 are opposed to the top end of the printing plate P. Thereby, the carriers 116 and 132 of the transport device 100 hold the printing plate P in a cantilever state in which the top end of the printing plate P is sucked.

Between the printing plate loading unit 24 and the printing unit 20;
A plurality of guide plates 146 are arranged between the printing unit 20 and the temporary accumulation unit 42 at positions corresponding to the height of the upper surface of the printing platen 20A.

The transport device 100 transfers the printing plate P placed on the conveyor 50 of the printing plate loading section 24 to the carrier 116.
When the carrier 116 is adsorbed and held by the
The printing plate P is conveyed to the printing surface plate 20A of the printing unit 20 by moving the printing plate P to the printing side.

At this time, the top side in the vertical direction of the printing plate P adsorbed by the carrier 116 is placed on the printing platen 20A from above the conveyor 50 via the guide plate 146, and passes over the printing platen 20A by a predetermined amount. It slides to the position.

On the other hand, in the transfer device 100, the printing platen 20
When the upper printing plate P is sucked and held by the carrier 132, the printing plate P is discharged from the printing platen 20A by moving the carrier 132 to the temporary accumulation section 42 side. At this time, the printing plate P moves so that the ground side in the vertical direction slides on the printing platen 20A, and then moves to the temporary accumulation section 42 via the guide plate 146.

In the printing plate loading section 24, the conveyor 5
0 support bar 60 faces the suction cup 124 of the carrier 116 moved to the printing plate loading unit 24 side,
Accordingly, when the printing plate P placed on the conveyor 50 is sucked by the suction cup 124 of the carrier 116, the occurrence of a suction failure due to the bending of the printing plate P is prevented.

As shown in FIGS. 3, 5, 6A and 6B (not shown in FIG. 4), the carrier 116 is provided with an air nozzle 142 on a base plate 118. I have.

As shown in FIG. 3 and FIG. 5, the air nozzle 142
Are arranged on the outside in the width direction, and the tip is
18 is inserted into one of the plurality of round holes 144 formed. Air nozzle 1 inserted in round hole 144
The tip of 42 is directed to the printing plate P side and the ground side of the printing plate P in plan view. 5 and 6 (A), FIG.
As shown in (B), the tip of the air nozzle 142
It is directed obliquely downward.

As a result, the air nozzle 142 can air toward the lower surface of the printing plate P that is suction-held by the carrier 116 in a cantilever state. When the printing plate P sucked and held by the carrier 116 reaches the printing platen 20A, the air jetted from the air nozzle 142 enters between the surface of the printing platen 20A and the lower surface of the printing plate P. ing.

On the other hand, as shown in FIG.
60 includes a solenoid valve 290A, 290B for operating the air cylinder 108,
Along with 290C, solenoid valves 292A and 292B for operating air cylinders 112 and 126 provided on carriers 116 and 132 are connected.

The controller 262 controls the movement of the carriers 116 and 132 as well as the movement of the carriers 116 and 132 by using these solenoid valves 290A to 290C, 292A and 292B.

Further, to the controller 262, solenoid valves 294A and 294B for operating a vacuum ejector 272 for supplying a negative pressure to the suction cup 124 of the carrier 116 and the suction cup 136 of the carrier 132 are connected.

The controller 262 is connected to the air cylinder 10
By controlling the solenoid valves 294A and 294B in accordance with the control of 8, 112 and 126, the carrier 1
The printing plate P is sucked, held, and transported to each of 16 and 132.

Further, the controller 262 has a solenoid valve 2 for supplying air to the air nozzle 142.
96 are connected. The controller 262 opens the solenoid valve 296 to supply air to the air nozzle 142 when the printing plate P is transported from the printing plate loading unit 24 to the printing unit 20 by the carrier 116.

On the other hand, as shown in FIG. 11, the controller 262 includes ejection holes 216A, 216B, 218A, 218B, 220B provided in the printing platen 20A.
A, solenoid valve 268 for supplying air to 220B
A to 268F are connected to the controller 262
The solenoid valves 268A to 268B are opened not only when the printing plate P is taken out from the printing platen 20A but also when the printing plate P is transferred onto the printing platen 20A by the carrier 116 of the transfer device 100, Spout hole 216
A, 216B, 218A, 218B, 220A, 220
B blows air.

The operation of the present embodiment will be described below.

In the plate printing apparatus 10, the film loading unit 1
2 is loaded with a negative film N, and a printing plate loading unit 2 is loaded.
4, the printing plate P is loaded, and thereafter, plate making information such as the size of the printing plate P and the arrangement of images to be printed on the printing plate P is input from an operation panel (not shown), and the printing process is started. At this time, the printing plate loading section 24 is loaded with the skid 22 in which the printing plates P of a required size are stacked.

In the plate material printing apparatus 10, when the start of the printing process is instructed, the negative film N
After the negative bar 16 is attached to a predetermined position of the negative film N, the negative film N is transported to the printing unit 20 together with the negative bar 16.

Further, in the printing plate printing apparatus 10, the printing plate P loaded in a state of being stacked on the printing plate loading section 24 is taken out from the uppermost layer and is conveyed to the printing section 20.
Is positioned on the printing platen 20A, and is suctioned and held by the suction groove 202 or the negative pressure supplied to the suction grooves 202, 204A, 204B, and the printing platen 20A is moved to the ground side in the top-to-bottom direction. The top side of P is placed at the printing position.

The negative film N transported to the printing unit 20
Is positioned and mounted on the printing plate P. In the printing plate printing apparatus 10, the printing plate P and the negative film N on the printing platen 20A are covered with an overlay sheet (not shown) for squeezing, and the suction grooves 206A to 214C.
After the printing plate P and the negative film N are held in close contact with each other by the negative pressure supplied to the printer, image printing is first performed on the top side of the printing plate P.

When the image printing on the top side of the printing plate P is completed, the supply of the negative pressure to the suction grooves 206A to 214C is released, and the air is blown out from the blowing holes 218 and 220 so that the negative film N and Overlay sheet and printing plate P
After releasing the close contact with the printing surface plate 20A and lifting the negative film N and the over example sheet, the printing surface plate 20A is moved to the top side, and the ground side of the printing plate P is arranged at the printing position. . Thereafter, the negative film N and the overlay sheet are again brought into close contact with the printing plate P, and image printing on the ground side of the printing plate P is performed.

In the printing plate printing apparatus 10, the printing of the image on the printing plate P is completed as described above, and when the negative film N and the overlay sheet are lifted from the printing plate P, the suction grooves 202 and 204 A are formed. , 204B, the supply of the negative pressure to the printing plate P is released, and the air is blown out from the blowing holes 216 to release the close contact between the printing plate P and the printing platen 20A. It is discharged to the stacking unit 42.

By the way, in the transfer device 100 provided in the plate printing apparatus 10, the suction cup 124 of the carrier 116 is used.
Then, the top end of the printing plate P is sucked to hold the printing plate P in a cantilevered state, and the air cylinder 108 is driven to move the carrier 116 from the printing plate loading unit 24 to the printing unit 20. As a result, when the printing plate P sucked and held by the carrier 116 is placed on the printing platen 20A from the conveyor 50 via the guide plate 146, the printing plate P further moves on the printing platen 20A as shown in FIG. I do.

At this time, the controller 262 opens the solenoid valve 296 and supplies air to the air nozzle 142 provided on the carrier 116 of the transfer device 100. The air nozzle 142 has a front end directed toward the lower surface of the printing plate P held in a cantilevered state by the carrier 116. When air is supplied to the air nozzle 142, the air nozzle 142 is positioned below the ground side of the printing plate P. Air is ejected toward.

From the middle part of the printing plate P in the vertical direction to the ground side,
The printing platen 20 from the conveyor 50 through the guide plate 146
A, the upper surface of the printing platen 20A is moved. At this time, the air jetted from the air nozzle 142 toward the lower surface of the printing plate P enters the upper surface of the printing platen 20A and the lower surface of the printing plate P.

As a result, an air layer is formed between the printing platen 20A and the printing plate P, and the printing plate P smoothly moves on the printing platen 20A without sticking to the surface of the printing platen 20A. .

On the other hand, in the printing platen 20A, the ejection holes 216 for releasing the close contact of the printing plate P and the ejection holes 218 for releasing the close contact of the negative film N and the overlay sheet covering the negative film N are provided. And the ejection hole 220
Is provided.

The controller 262 opens the solenoid valves 268A to 268F when the printing plate P is transferred from the printing plate loading unit 24 to the printing unit 20 by the transfer device 100, and ejects the jet plate provided on the printing platen 20A. Hole 21
Supply air to 6-220. Thereby, the ejection hole 2
Air is blown upward from each of 16 to 220 above printing surface plate 20A.

When the printing plate P is conveyed onto the printing platen 20A by the carrier 116 of the conveying device 100 in a state where the air is jetted from the jet holes 216 to 220, the jet holes 216 to 220 are discharged. From 220, air is blown toward the lower surface of the printing plate P.

As a result, an air layer is formed between the printing plate P and the printing plate 20A, and the printing plate 20A is lifted by the air blown out from the ejection holes 216 to 218. Move up. Therefore, the printing plate P can be more reliably prevented from sticking to the printing platen 20A, and the printing plate P can be moved smoothly.

As described above, in the present embodiment, the printing plate P
Nozzle 1 is attached to carrier 116 that transports cantilevered
The printing platen is formed by ejecting air using ejection holes 216 to 220 provided to provide the printing plate P, the negative film N or the overlay sheet from the printing platen 20A or to facilitate removal of the overlay sheet. It is possible to reliably prevent the occurrence of transport failure due to sticking of the printing plate P moving on the 20A, and to smoothly transport the printing plate P even in a cantilevered state.

In this embodiment, the carrier 116 transports the printing plate P from the printing plate loading unit 24 to the printing unit 20.
The air nozzle 142 is provided on the carrier 132 for transporting the printing plate P from the printing unit 20 to the temporary accumulation unit 42. Accordingly, even when the printing plate P is supported and discharged from the printing platen 20A in a cantilevered state, the printing plate P is reliably prevented from sticking to the printing platen 20A, and the printing plate P can be removed from the printing platen 20A. Thus, the printing plate P can be transported more smoothly.

Further, the present embodiment described above does not limit the configuration of the present invention. The present invention is not limited to the printing plate printing apparatus 10 applied to the present embodiment, but is applied to a printing plate printing apparatus having an arbitrary configuration for transporting the printing plate P in a cantilever state, and a transfer apparatus used for the printing plate printing apparatus. be able to.

[0100]

As described above, in the printing plate conveying apparatus of the present invention, when the printing plate is conveyed in a cantilever state, the air supply means supplies air to the lower surface side of the printing plate. Further, in the printing plate printing apparatus of the present invention, when the printing plate is conveyed in a cantilevered state on the surface plate, the conveyance assisting unit jets air from the jet holes.

Thus, when the printing plate moves on the surface plate, an air layer can be formed between the printing plate and the surface plate, and the printing plate can be smoothly transported without sticking to the surface plate. An excellent effect that can be obtained is obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram schematically showing a printing plate printing apparatus applied to the present embodiment.

FIG. 2A is a schematic diagram showing a printing plate P1 of 2L1W size, and FIG. 2B is a schematic diagram showing a printing plate P2 of 2L2W size.

FIG. 3 is a schematic configuration diagram of a printing plate loading unit and a printing unit.

FIG. 4 is a schematic perspective view showing a transport device.

FIG. 5 is a perspective view of a main part showing a carrier provided in the transport device.

6A is a schematic configuration diagram of the carrier shown in FIG. 5 as viewed from the top and bottom sides of the printing plate, and FIG. 6B is a schematic configuration diagram of the carrier shown in FIG. 5 as viewed from the width direction of the printing plate. is there.

FIG. 7 is a schematic plan view showing a printing surface plate.

FIG. 8 is a schematic perspective view showing a printing platen and a part of a transport device, and shows a printing plate being transported from a printing plate loading unit to a printing unit.

FIG. 9 is a schematic perspective view showing a printing platen and a part of a conveying device, and shows a state in which a top side of a printing plate is moved to a printing position.

FIG. 10 is a schematic perspective view showing a printing platen and a part of a conveying device, and shows a state in which a ground side of a printing plate has been moved to a printing position.

FIG. 11 is a schematic diagram showing a connection between a schematic system of an air pipe formed on a printing surface plate and a controller.

FIG. 12 is a schematic diagram showing a connection between a schematic system of an air pipe formed in a transfer device and a controller.

[Explanation of symbols]

Reference Signs List 10 plate material printing apparatus 20 printing section 20A printing platen (platen) 24 printing plate loading section 42 temporary stacking section 100 transfer device (print plate transfer device) 108 air cylinder (moving means) 116 carrier (print plate transfer device, suction) Means) 124 suction cup (adsorption means) 142 air nozzle (air supply means) 202, 204A, 204B, 206A, 206B, 2
08A to 208C, 210A to 210C, 212 Suction groove (suction means) 216 to 220 Spout hole 262 Controller (air supply means, spout means,
Transport assisting means)

Claims (2)

[Claims] 1. A printing plate transport device that supports one end of a printing plate and transports the printing plate on a surface plate, comprising: a suction unit that sucks and holds one end of the printing plate; A driving unit for moving the printing plate by moving the suction unit that has sucked the unit in a predetermined direction; and a driving unit that is provided integrally with the suction unit and that faces the lower surface of the printing plate that is sucked by the suction unit. A printing plate transport device, comprising: air supply means for blowing and supplying air. 2. An original film, comprising: a conveying means for adsorbing and holding one end side of the printing plate, lifting the printing plate, and conveying the printing plate on a surface plate. A printing plate printing apparatus for printing an image recorded on the printing plate by close contact exposure, wherein the printing plate or the original film is suction-held on the printing platen during image printing, and formed on the platen. By blowing out the air supplied to the blowout hole from the blowout hole to the upper side of the surface plate, the close contact between the printing plate and the surface plate or between the original film and the surface plate by the suction holding means is reduced. Ejection means for canceling, conveyance assist means for operating the ejection means when the printing plate moves on the surface plate by the conveyance means,
A plate printing apparatus comprising: