JPH03118543A - Plate material printing device - Google Patents

Abstract

PURPOSE:To impart tension to a negative sheet and to offer a plate material printing device which develops no wrinkles and color slurring by stretching the negative sheet in the direction of a negative frame after the end of the negative sheet is supported on a supporting member. CONSTITUTION:The negative sheet to which a negative film is applied is supported to the negative frame 194 with a pin bar 210 and the pin 214 of a pin bar 212. Under this condition, a pair of air cylinders 250 is operated, and a pressure roller 252 is pressed inside the negative frame 194 and is moved to a pressure member 256. Consequently, one edge of the negative sheet is surely supported to the negative frame 194. Under this condition, an air cylinder 242 is operated, and the negative sheet is stretched to impart tension. At this time, the pin bar 210 supporting the one edge of the negative sheet becomes movable in the width direction of the negative sheet and rockable around a shaft member, and therefore the negative sheet does not receive twist and other types of force when tension is imparted thereto. As a result, the negative sheet is never wrinkled.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides an image on a manuscript film (hereinafter referred to as "negative film") to a photosensitive lithographic printing plate (hereinafter referred to as "PS plate").
Regarding the plate material printing device that prints onto a plate, in detail, it supports a transparent sheet with negative film attached (hereinafter referred to as "negative sheet") to a document frame (hereinafter referred to as "negative frame"), or supports a negative film to a negative frame. The present invention relates to a plate material printing device that is placed on a photosensitive planographic printing plate and prints an image recorded on a negative film onto the photosensitive planographic printing plate.

[Prior Art] A PS plate used in a rotary press for printing newspapers is supplied to a printing section of a printing device, and an image of a negative film pasted onto a negative sheet is printed thereon.

A surface plate is disposed in the printing section, and the PS plate supplied to the printing device by the PS plate supply device is placed at a predetermined position on the surface plate. A negative sheet supported by a negative frame is placed at a predetermined position on the PS plate.

The negative frame has pins erected corresponding to both longitudinal ends of the negative sheet, and by inserting these pins into through holes provided in the negative sheet, the negative sheet is fixed to the negative frame. .

[Problems to be Solved by the Invention] However, when fixing the negative sheet to the negative frame as described above, if the pins are misaligned, the negative sheet will sag, and if it is placed on the photosensitive planographic printing plate in this state, Wrinkles, etc. occur. For this reason, there is a problem that so-called blurring occurs during printing.

Furthermore, in the case of color printing, there is a problem that color misregistration and the like occur.

Therefore, it is possible to pull the negative sheet so that it does not sag, but depending on the position of the pins, excessive force may be applied to the negative sheet, and in this case, wrinkles may occur.

The present invention has been made in consideration of the above facts, and an object of the present invention is to provide a printing plate printing apparatus that does not cause undue force on a negative sheet, and does not cause wrinkles or color shift.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides the first
a support means for supporting one end of the negative sheet in the first direction to the negative frame; a support member for supporting the other end of the negative sheet in the first direction; a presser member that presses one end side of the support member against the support member; and a presser member that is movable in a direction perpendicular to the first direction and moves toward the negative frame to pull the negative sheet. and a moving means for applying tension to the negative sheet.

[Operations] According to the present invention having the above configuration, one end of the negative sheet in the first direction is supported on the negative frame by the supporting means.

Next, after the other end of the negative sheet in the first direction is supported to the support member, the one end side is pressed from the support member to the support member by a presser member, and in this state, it is moved in the direction of the negative frame by the moving means. then pull the negative sheet. This applies tension to the negative sheet.

Since the negative sheet is movable in a direction perpendicular to the first direction when the pressing member is moved by the moving means, no unreasonable force is applied to the negative sheet, and no wrinkles or the like occur.

[Effects of the Invention] According to the present invention having the above configuration, after one end of the negative sheet in the first direction is supported by the support means, the other end of the negative sheet in the first direction is supported by the support member, The negative sheet is held down by a holding member, and this holding member is moved in a movable state in a direction perpendicular to the first direction by a moving means, so that no unreasonable force is applied to the negative sheet, and no wrinkles or color shift occur. This excellent effect can be obtained.

[Embodiment] FIGS. 1 to 3 show an embodiment of a printing plate printing apparatus 10 according to the present invention. FIG. 1 is a side view of the printing plate printing apparatus, FIG. 2 is a front view, and FIG. 3 is a plan view. Large arrows A-C in each of these figures indicate the flow of the PS plate, which is a plate material.

As shown in FIGS. 1 to 3, a printing plate printing device 10
is formed into a box shape with a frame 11, and there is a P inside.
A PS plate supply unit 14 that supplies the S plate 12 (see FIG. 3), a printing unit 16 that prints the image recorded on the PS plate 12 Henega film supplied from the PS plate supply unit 14, and the printing unit 16 Henega film. A negative sheet supply section 18 that supplies a negative sheet with a pasted thereon, and a PS plate discharge section 20 that discharges a PS plate 12 on which an image of a negative film has been printed are provided.

The PS plate can be supplied to the PS plate supply section 14 using an auto feeder such as that described in Japanese Patent Laid-Open No. 63-106245, Japanese Patent Laid-Open No. 63-171728, and the like.

Also, on the rear side of the PS version discharge section 20, there is a
72, Japanese Patent Publication No. 62-34429, etc. can be connected, and furthermore, a punching device, a bending device, etc. can be connected to the rear side of the garden.

PS plate 1 supplied from the PS plate supply unit 14 to the printing unit 16
2 is positioned and placed on a surface plate 22 provided in the printing section 14 by a positioning device 21. This PS version 1
A negative sheet supplied from the negative sheet supply section 18 is placed on the PS plate 12 while being positioned at a predetermined position on the PS plate 12 by a negative sheet positioning device 23. In this state, light is irradiated from above by a light source 250 lamp, etc., and the image of the negative film on the negative sheet is transferred to the PS plate 12.
Baked on top.

After the image on the negative film is printed onto the PS plate 12, the negative sheet moves upward from the PS plate 12, and the P
The S plate 12 is discharged outward from the PS plate discharge section 20.

Next, the negative sheet 24 to which a negative film with an image recorded is pasted will be explained with reference to FIGS. 4 and 5.

Negative Sheet> As shown in FIG. 4, the negative sheet 24 has a thin rectangular shape and is provided with a negative film attaching section 24 in the center for attaching a negative film on which an image has been recorded. A metal plate 26 is fixed to the upper end of the negative sheet 24 along the width direction (six directions of arrows in the figure) to form a hanging portion 24B.

This hanging portion 24B has four through holes 28A, 128B, 30 at predetermined intervals along the width direction of the negative sheet 24.
A and 30B are formed to penetrate the metal plate 26. Through these through holes 28A, 28B, 30A, and 30B,
As shown in FIGS. 3 and 4, one end of the negative sheet 24 is supported when it is suspended or when tension is applied.

A metal bar 32 having a U-shaped cross section perpendicular to the longitudinal direction is fixed to the lower end 24C of the negative sheet 24 on the same side as the metal plate 26 along the width direction of the negative sheet 24. Also, the lower end 2
A pair of through holes 34A and 34B are formed in the negative sheet 4C along the width direction of the negative sheet 24. This through hole 34A,
34B also passes through the metal bar 32.

A negative film 36 on which an image is recorded is attached to the negative sheet 24 at a predetermined position using tape or the like.

In this state, the negative sheet 24 is loaded into the negative sheet supply section, placed on the PS plate 12 placed in advance on the surface plate 22, and the image of the negative film is printed onto the PS plate 12.

Each part of the plate material loading device 10 will be described in detail below with reference to the drawings.

<PS plate supply unit> As shown in FIGS. 1 to 3, the PS plate supply unit 14
A plate feeding conveyor 40 is arranged.

This plate feeding conveyor 40 accommodates a plurality of PS plates 12 and supplies the PS plate 12 fed from a PS plate auto feeder (not shown) disposed on the side of the plate printing device 10 onto the surface plate 22. do.

As shown in FIGS. 6 and 7, the plate feeding conveyor 40
are a shaft 42 and a shaft 44 arranged parallel to each other.
A plurality of belts 46 are wound between the two shafts via a plurality of pulleys 48 and 50 attached to each shaft.

The shaft 42 is rotatably supported by a pair of side plates 52 supported by the frame 11. One end of the shaft 42 passes through one side plate 52 and protrudes outward between the side plates 52, and a sprocket wheel 54 is attached to the tip thereof.

A chino 56 is wound around this sprocket wheel 54 and a drive shaft of a motor (not shown).

One end of a plurality of pillars 58 is supported by the shaft 42, respectively. A long hole 58A is provided at the other end of each of these columns 58, into which the shaft 44 is inserted. Further, a compression coil spring 60 is arranged within the elongated hole 58A. The compression coil spring 60 biases the shaft 44 toward the end of the post 58. This applies tension to the belt 46 wound around the pulleys 48, 50.

A shaft 45 is disposed at an axially intermediate portion of the shafts 42, 44, passing through a plurality of struts 58. An air cylinder 64 is connected to this shaft 45 via a bracket 62.
One end of the drive shaft 64A is connected to the drive shaft 64A. The air cylinder 64 is rotatably supported to the frame 11 via a bracket 66.

When the drive shaft of the air cylinder 64 is inserted into the main body, it is retracted away from the surface plate 22 as shown by the dashed line in Figure 6, and the drive shaft of the air cylinder 64 protrudes from inside the main body. If so, the shaft 44 side end rotates around the shaft 42, and the shaft 44 side end approaches the surface plate 22. Thereby, the area around the surface plate 22 can be simplified, and the maintainability of each device arranged around the surface plate 22 is improved.

Further, as shown in FIG. 7, an air cylinder 72 is attached to a support 58 located at an axially intermediate portion of the shaft 42 via a bracket 59. A hook member 74 is attached to the tip of the drive shaft of the air cylinder 72. This hooking member 74 is arranged on the plate feeding conveyor 40 and is moved on the plate feeding conveyor 40 by driving of the air cylinder 72. When the 23rd plate 12 is caught on the plate feeding conveyor 40, this hooking member 74 forcibly presses the end of the 23rd plate 12 and reliably sends the 23rd plate 12 onto the surface plate 22.

A pair of conveying rollers 66 rotatably supported by the side plate 52 is arranged at the upper part on the shaft 42 side.

The 23rd plate 12 fed from the aforementioned auto feeder (not shown) is inserted into this pair of conveying rollers 66 and sent onto the plate feeding conveyor 40 .

Further, a guide roller 68.7 is provided on the surface plate side of the pair of conveyor rollers 66.
0 is placed. The guide rollers 68 and 70 guide the 23rd plate 12 sent out from the transport roller pair 66 onto the plate feeding conveyor 40.

Therefore, -1 plate 12 fed from an auto feeder (not shown) is inserted between the pair of conveying rollers 66, and is sent onto the plate feeding conveyor 40 while being guided by guide rollers 68 and 70. 2 sent onto plate feeding conveyor 40
The third plate 12 is conveyed on the plate feeding conveyor 4 and sent onto the surface plate 22 of the printing section 16.

Burning Section> As shown in FIG. 8, the surface plate 22 of the burning section 16 has suction grooves 78 formed on its upper surface. This suction groove 78 is
2, and second and third suction grooves 78B and 78C are formed so as to be surrounded by the first suction groove 78A. has been done. These first, second, and third suction grooves 78A,
78B and 78C are each connected to a negative pressure supply device 80, and negative pressure is supplied to each of them independently, so that they adsorb the 23rd plate 12 placed on the surface plate 22. Due to this adsorption, 2
The third plate 12 is fixed onto the surface plate 22.

In addition, since there are three systems of suction grooves, for example, as shown in FIG.
Only B needs to be supplied with negative pressure, and in this case, 23rd edition 12
Negative pressure is not supplied to the area where is not placed, and even if the negative sheet 24 is placed on the surface plate 22, the surface plate 2
2 will not be adsorbed.

Further, as shown in FIG. 10, when the size of the 23rd plate 12 is large (that is, the printing plate size of 4 newspaper pages), negative pressure is supplied to all of the grooves 78A, 78B, and 78C.

Positioning device> As shown in FIGS. 9 and 1O, there is a P
A surface plate white reference pin 82 is arranged to determine the position of the S plate 120 in the width direction. This surface plate white reference pin 82 comes into contact with the front side of the 23rd plate 12 fed from the plate feeding conveyor 40,
The 23rd plate 12 is positioned at a predetermined position on the surface plate 22.

Further, around the surface plate 22, reference pins 84 and 86 outside the surface plate are erected from above the base 88. The leading portion C is located at a position slightly higher than the height of the surface plate 22 from the base 88.

The corner portions of the 23rd plate 12 come into contact with these reference pins 84 and 86 outside the surface plate.

Furthermore, as shown in FIGS. 9 and 10, the surface plate 2
2, surface plate white reference pins 108 and 110 are arranged so as to be retractable from the upper surface of the surface plate 22. Also, surface plate 2
A reference pin 112 outside the surface plate is provided on the side of the negative sheet supply section 2. The tip of this reference pin 112 outside the surface plate is located at a slightly higher position than the upper surface of the surface plate 22.
It comes into contact with the side of the third plate 12. These reference pins in the surface plate 1
As shown in FIGS. 9 and 10, the 08.110 and surface plate quality reference pin 112 are positioned to print an image of a negative film onto one side of the PS plate 120.

Pusher〉 Also, around the surface plate 22, place the PS plate 12 on the reference pin 8 in the surface plate.
2. First pusher 9 that presses against surface plate quality reference bin 84
0 is placed.

As shown in FIGS. 11 and 12, the first bushing 90 includes an air cylinder 92 and a rotating body 94 fixed to the drive shaft of the air cylinder 92. As shown in FIGS.

The air cylinder 92 is rotatably supported by a bracket 98 fixed on a support bracket 96 placed on the base 88. A drive shaft 92A of this air cylinder 92 is inserted into a long hole 100A passing through a guide plate 1000 attached to the side wall of the surface plate 22.

A guide piece 102 is attached to the tip of the drive shaft 92A.

The guide piece 102 has a slope formed on the lower surface side,
It is placed on the slope portion 100B of the guide plate 100 and slides on the slope portion 100B.

One end of a pin 104 that supports the rotating body 94 is fixed to the upper surface side of the guide piece 102. The rotating body 94 is rotatably supported on this pin 104.

Further, a pair of tension coil springs 106 are arranged on both sides of the air cylinder 920, one end of which is fixed to the guide piece 102, and the other end of which is fixed to the support bracket 96. This tension coil spring 106 urges the air cylinder 92 downward. Further, when the air cylinder 92 is not in operation, it is retracted to a position lower than the upper surface of the surface plate 22, as shown by the dashed dotted line in Figure 11. When the air cylinder 92 is actuated and the drive shaft protrudes from the main body, the guide piece 102 rises obliquely on the slope, and the rotating body 94 protrudes upward from the surface plate 22. The side of the PS plate 12 already placed on the surface plate 22 comes into contact with this rotating body 94 and presses it toward the reference pin 82 in the surface plate.

Further, a second pusher 114 is arranged around the surface plate 22. This second pusher 114 comes into contact with one side of the PS plate 12 in the vertical direction, and presses the PS plate 12 against the platen quality reference pins 84 and 86.

As shown in FIG. 13, the second bushing 114 has an air cylinder 118 rotatably supported by a support bracket 116 erected from a base 88. A drive shaft 118A of this air cylinder 118 passes through the other end of a guide plate 126 supported on the side surface of the surface plate 22, and a guide piece 120 is fixed to the tip of the guide plate 126. The rotating body 124 is supported by the rotary member 124 .

A slope 120A is formed on the lower surface side of the guide piece 120. This slope 120A is in contact with the slope 126A formed on the guide plate 126, and the operation of the air cylinder 118 moves the guide piece 120 to the slope 126A formed on the guide plate 126.
If it slides on 26A, it will rise.

Further, a protrusion 128 is provided on the lower surface side of the guide piece 120. One end of a tension coil spring 130 is fixed to the tip of this protrusion 128. The other end of the tension coil spring 130 is fixed to the tip of a pole 132 erected on the base 88. Therefore, the air cylinder 118 is urged clockwise in FIG. 13 around the shaft support.

Transverse feed device> Also, as shown in Fig. 3, there is a PS on the side of the surface plate 22.
A plate traversing device 132 is arranged.

This PS plate lateral feeding device 132 uses pushers having the same configuration as the first and second pushers described above, and as shown in FIGS. 1, 9 and 10, images are transferred to one side of the PS plate 12. After printing, press P to print the image on the remaining side.
Move S version 12.

<Light Source> As shown in FIGS. 1 and 14, a light source 134 is arranged above the surface plate 22. This light source 134 is covered with a light source hood 136. This light source hood 136 consists of two air cylinders 138.1 supported by the frame 11.
40, and is suspended by air cylinders 138 and 140.

Further, one end of the light source hood 136 is connected to a guide rod 142 supported by the frame 11. This guide rod 142
The middle portion of the frame 11 is supported by a slide bearing 144 supported by the frame 11 so as to be movable in the vertical direction. Therefore, the light source hood 136 moves up and down when the air cylinders 138 and 140 operate.

A pressing member 146 having a 5-shaped cross section is attached to the lower end of the light source hood 136. A hard sponge 148 is attached to the lower part of this pressing member.

When the light source hood 136 is lowered, the sponge 148 presses the overlapping portion of the PS plate 12 on the surface plate 22 and the negative sheet 24 placed on the 28 plate 12.

Squeeze device> A squeeze device 1 is provided between the surface plate 22 and the light source hood 136.
48 are arranged. As shown in FIGS. 15 and 16, a pair of guide rails 150 are arranged parallel to each other on both sides of the surface plate 220 in the width direction (however, the 15th
16, the guide rail on one side is omitted). Slide blocks 152 are attached to these guide rails 150.
are fitted into the guide rails 150, ie, in the vertical direction of the surface plate 22 (in the direction indicated by the arrow in the figure and in the opposite direction).

The middle portions of squeeze arms 154 are supported by pins 155 on the slide blocks 152, respectively.

The other end of the squeeze arm 154 is in contact with a stopper 155. A squeeze roller 156 is pivotally supported between the lower ends of these squeeze arms 154. This squeeze roller 156 is attached to the 28th plate 1 placed on the surface plate 22.
Press the negative sheet 24 on 2 and press the negative sheet 24 and P.
Air between the plate and the S plate 12 is removed.

Guide rollers 158 are pivotally supported at the upper ends of the squeeze arms 154, respectively, and these guide rollers 158 are in contact with a pair of guides 160 arranged at the upper part of the surface plate 22, respectively.

Further, one end of a pair of arms 162 is connected between the lower end of the squeeze arm 154 and the pin 155, respectively. The other end of this arm 162 is a slide block 15
2 is supported on a block 164 which is pivotally supported on the block 164. A compression coil spring 166 is disposed between the block 164 and the arm 162, and urges the tip of the arm 162 downward.

On the other hand, the slide block 152 is connected to a belt 172 that is wound between sprocket wheels 168 and 170. A sprocket wheel 174 is attached to the rotating shaft of the sprocket wheel 168, and a belt 180 is wound between the sprocket wheel 174 and the sprocket wheel 178 attached to the drive shaft 176A of the motor 176.

Therefore, the driving force of the motor 176 is transmitted to the sprocket wheel 174, the sprocket wheel 168 rotates, and the belt 172 is conveyed.

The slide block 15 is conveyed by this belt 172.
2 moves in the vertical direction of the surface plate 22. As a result, the squeeze roller 156 moves and squeezes the negative sheet 24.

Further, a stopper 221 is provided at a position after the roller has finished moving. This stopper 221 contacts the squeeze arm 154 and swings about the pin 155, thereby separating the squeeze roller 156 from the negative sheet 24.

Negative sheet supply section> Next, the negative sheet supply section 18 will be explained.

As shown in FIG. 1, a holding frame 182 is arranged between the surface plate 22 and the light source 134. Figures 17 to 2
As shown in Figure 0, this holding frame 182 has a rectangular shape, and has drive shafts of a pair of air cylinders 184, which are disposed facing downward and supported by the frame 11, and an earthen wall. are connected. Further, one ends of a pair of guide rods 186 are connected to the earthen wall of the holding frame 182. A middle portion of this guide rod 186 is supported by a slide bearing 188. The bearing 188 is supported by a support plate 190 supported by the frame 11.

Due to the operation of this air cylinder 184, the holding frame 182
is raised and lowered in the vertical direction, and also raises and lowers a negative frame 194, which will be described later.

A pair of guide rails 192 having an oval-shaped cross section are supported at the lower portions of both sides of the surface plate 22 of the holding frame 182 in the vertical direction. A negative frame 194 is arranged between the pair of guide rails 192.

This negative frame 194 has a rectangular shape, and guide plates 196 are provided to protrude from both sides corresponding to the guide rails 192. The guide plates 196 are placed on guide rollers 198 that project from the guide rails 192 in a direction in which they touch each other. Thereby, the negative frame 194 is movable in the width direction of the surface plate 22 (in the direction of arrow A in the figure), and can be extended to the outside of the printing plate printing apparatus 10.

Further, a ball bearing 200 is mounted on the upper surface of the negative frame 194.
This ball bearing 200 that is in contact with the holding frame 1
The slide shaft 202 is supported at the tip of the slide shaft 202 supported by the slide shaft 82 . A compression coil spring 204 is arranged between the ball bearing 200 and the holding frame.
The negative frame 194 is urged downward.

On the other hand, as shown in 221, a pole caster 203 is placed on a pair of brackets 201 protruding from one side wall of the surface plate 22. Furthermore, a bracket 205 is attached to the other side wall, and a pole caster 207 is placed on it.

A roller 208 fixed to the tip of the drive shaft of an air cylinder 206 is in contact with the negative frame 194 . The air cylinder 206 is fixed to the outside of the guide plate 192, and a drive shaft 206A passes through the guide plate 192. By the operation of this air cylinder 206,
The negative frame 194 is pressed and moved to the left side of the paper in FIG.

As shown in FIG. 18, within the negative frame 194, pimpers 210 and 212 are arranged on each side along the width direction of the PS plate. A plurality of pins are provided protruding from the upper surface side of each of these, and the pin 214 provided in the pimper 210 is inserted into the through hole 28A128B provided in the negative sheet 24, and the pin provided in the pimper 212 is inserted into the through hole 28A128B provided in the negative sheet 24. 216 is inserted into the through holes 30A and 30B to support the negative sheet 24.

A pair of support pins 218 protrude from both sides of the pinper 210, respectively. These support pins 218 are inserted into long holes 220A of a pair of support blocks 220 fixed to the lower part of the negative frame 194, respectively. Therefore, the pimp 210 is movable in the vertical direction of the surface plate 22.

Further, a notch 232 is formed in the middle part of the pimper 210 from the negative frame 194. A pair of plates 240 are inserted into this notch 232, overlapped at a predetermined distance by a pair of spacers 234, and integrated by bolts 236 and nuts 238. These pairs of plates 24
A connecting block 244 fixed to the tip of the drive shaft of the air cylinder 242 is inserted between the air cylinders 242 and 242 and connected with bolts 246. Air cylinder 242 is supported by negative frame 194.

On the other hand, a pressing member 244 is attached to the hinge 210 on the pimper 210.
They are connected by 6. One end of a pair of stoppers 248 is supported at the intermediate portion of this pressing member 244. The other end of this stopper 248 is arranged to close the notch 232. This stopper 248 is connected to a pair of plates 240
is prevented from being pulled out from inside the notch 232. As a result, when the air cylinder 242 operates, the pimp 21
0 moves to the negative frame 194 side. As a result, the negative sheet 24 supported by the pimpers 210 and 212 is pulled by the operation of the air cylinder 242, and tension is applied.

A rectangular notch 224 and a 7-shaped notch 226 are formed in the pimp 212. These notches 224
．． 226 corresponds to cylindrical positioning cam followers 228 and 230 attached to the side of the surface plate 22, and when the negative frame 194 moves vertically by the operation of the air cylinder 206, the cams move into the notch 224. The follower 228 is inserted, the vertical position of the negative frame 194 is determined, and the cam follower 230 is inserted into the notch 226.
is inserted and positioned in the width direction.

Further, as shown in FIG. 22, the pressing member 244 of the pimper 210 is rotated approximately 90 degrees after one end of the negative sheet 24 is supported by the pimper 210, and held between the pimper 210 and the negative sheet 24.
The end of 4 is pressed.

Also, the negative frame 1 placed vertically on the pimper 212 side
A pair of air cylinders 250 are arranged within the air cylinder 94 . The end portions of press rollers 252 arranged in the width direction are connected between the drive shafts of these air cylinders 250. An enlarged diameter portion is formed in the intermediate portion of the presser roller 252, and serves to press a presser member 256 connected by a hinge 254 of the pimper 212.

Further, a pair of handles 253 are attached to the negative frame 194 and are used when pulling out the negative frame 194 from the holding frame 182.

<PS Plate Discharge Unit> A transport roller (not shown) is disposed in the PS plate discharge unit 20 and discharges the 23rd plate 12 on which the image has been printed to the outside of the plate printing device 10 .

Next, the operation of the present invention will be explained.

First, the negative frame 194 is pulled out from the holding frame 182, and the negative sheet to which the negative film has been pasted is placed on the pimp 2.
10.212 and supported by pins 214.216. From this state, each of the pressing members 244 and 256 is brought down and pressed. From this state, the pair of air cylinders 250 are operated to move the press roller 252 from inside the negative frame 194 onto the press member 244. As a result, negative sheet 2
4 is securely supported by the negative frame 194.

From this state, the air cylinder 222 is operated to pull the negative sheet 24 and apply tension. At this time, the pimper 2 whose one end is supported on the negative sheet 24
Since the negative sheet 10 is movable in the width direction of the negative sheet, no force such as twisting is applied to the negative sheet when applying tension, so that wrinkles do not occur in the negative sheet 24.

After setting the negative frame 194 and the negative sheet 24, this negative frame 194 is pushed into the lower part of the holding frame 182.

On the other hand, the tip of the plate feeding conveyor 40 is placed near the surface plate 22, and from this state an auto feeder (not shown) is operated to feed out the 23rd plate 12 and insert it between the pair of conveying rollers 66. 23rd plate 12 sent out from between the pair of conveyor rollers 66
is guided onto the plate feeding conveyor 40 by guide rollers 68, 70, conveyed obliquely by the plate feeding conveyor 40, and sent onto the surface plate 22.

At this time, if the leading end of the 23rd plate 12 is caught on the surface plate 22 and is not conveyed, the air cylinder 72 is operated to push the rear end of the 23rd plate 12 toward the platen using the hooking member. This ensures that the 23rd plate 1 is placed on the surface plate.
2 can be transported.

The 23rd plate 12 conveyed onto the surface plate 22 is pushed by the first pusher 90 toward the reference pin 82 inside the surface plate and the reference pin 84 outside the surface plate, as shown in FIGS. 10 and 11. and is brought into contact with these pins. At the same time, the second pusher 114 moves the reference pin 8 outside the surface plate.
4. It moves under pressure towards 86 and comes into contact with these pins.

As a result, the 23rd plate 12 is positioned at a predetermined position on the surface plate 22 (the position indicated by the chain dotted line in FIGS. 9 and 10).

From this state, the holding frame 182 and the negative frame 194 are lowered onto the PS plate 12 by actuation of the air cylinder 184 and placed on the pole casters 203 and 207. From this state, the air cylinder 222 operates and the negative frame 19
4 and insert the cam follower 228.23O into the notch 224.226. As a result, the negative frame 194
is positioned at a predetermined position on the PS plate 12. As a result, the negative sheet 24 is positioned at a predetermined position on the 23rd plate 12.

When the negative sheet 24 is positioned at a predetermined position on the 23rd plate 12, the squeeze device 14g is activated and the squeeze roller 1
56, the negative sheet 24 and the 23rd plate 12 are brought into close contact with each other. When the squeeze by the squeeze roller 156 is finished,
This squeeze roller 156 is separated from the negative sheet 24.

Next, the air cylinder 138 is activated, and the light source hood 1
36 is lowered, and the sponge 147 of the pressing member 146 comes into contact with and presses the overlapping portion of the negative sheet 24 and the 23rd plate 12. With this, the negative sheet 24 can be reliably transferred to the PS version 12.
It can be attached closely to the top and no blurring occurs.

From this state, light is irradiated by the light source 134, and the image 23 of the negative film pasted on the negative sheet 24 is
It is printed onto the plate 12.

When the image is printed on the PS plate 12, the negative frame 194 is raised together with the holding frame 182, and the negative sheet 24 is transferred to the PS plate 1.
2. Move away from above.

Next, the 23rd plate 12 is moved by the PS plate traversing device 132 to the position shown by solid lines in FIGS. 10 and 11. This is because since the image has been printed on one side, it is necessary to print the image on the other side.

The 23rd plate 12 on which the image has been printed is discharged by the PS plate discharge device 20 to the outside of the plate material printing device 10 in the six directions of arrows as shown in FIG. 3, and is accumulated in a stocker (not shown).

[Brief explanation of drawings]

1 to 3 show an embodiment of the printing plate printing apparatus according to the present invention. FIG. 1 is a front view, FIG. 2 is a side view, FIG. 3 is a plan view, and FIG. 4 is a perspective view showing a negative sheet. Figure 5 is a sectional view taken along the line ■-■ in Figure 4, Figure 6 is a side view showing the plate feeding conveyor, Figure 7 is a side view showing the hooking member, and Figure 8 is a side view showing the plate feeding conveyor. Front view showing suction grooves on the board, Figures 9 and 10
The figure is a plan view showing the relationship between the PS printing plate placed on the surface plate and the negative sheet and the position of the reference pin, FIG. 11 is a side view showing the first pusher, and FIG. 12 is a side view showing the first pusher. 13 is a side view showing the second pusher, FIG. 14 is a side view showing the light source, FIG. 15 is a side view showing the squeeze device, and FIG. 16 is a plan view showing the squeeze device. Fig. 17 is a plan view showing the holding frame on the negative frame, Fig. 18 is an exploded perspective view showing the relationship between the negative frame and the holding frame, Fig. 19 is a front view showing the negative frame and the holding frame, and Fig. 20 is a plan view showing the holding frame on the negative frame. 21 is a plan view showing the surface plate, FIG. 22 is a perspective view showing the pin bar, and FIG. 23 is a perspective view showing the presser roll. 10... Plate material printing device, 12... PS plate, 14... PS plate supply section, 16... Baking section, 18... Negative sheet supply section, 20... PS plate discharge section, 22 ... Surface plate, 184 ... Pair of air cylinders, 194 ... Negative frame, 206 ... Air cylinder, 210.212 ... Pimper 214.216 ... Pin, 244.256 ... Holding member.

Claims (1)

[Claims] (1) A plate material printing device in which a negative frame supporting a negative sheet with a negative film pasted thereon is placed on a photosensitive planographic printing plate, and the image recorded on the negative film is printed onto the photosensitive planographic printing plate. a support means for supporting one end of the negative sheet in the first direction to the negative frame; a support member for supporting the other end of the negative sheet in the first direction; a presser member that presses one end of the negative sheet supporting portion of the support member against the support member; and a presser member that presses the presser member toward the negative frame in a state in which the support member is movable in a direction perpendicular to the first direction. A printing plate printing apparatus comprising: a moving means for moving and pulling the negative sheet to apply tension to the negative sheet.