JPH08114931A - Skippable printing device for printing plate - Google Patents

Abstract

PURPOSE: To enable smooth and rapid photocomposing work in a photocomposing process. CONSTITUTION: A marker for proof reading 200 is attached to a frame mask 120 provided in the light source unit of this skippable printing device, and moved integrally with the frames mask 120. As for the marker for proof reading, a timing belt 222 to which a proof reading mask 210 is attached is driven by a pulse motor 214. By driving the belt 222, the mask 210 is accurately moved along a guide rail 204 and its leading edge is projected to a specified position in the printing aperture 120A of the frame mask 120. By lowering the frame mask 120 and bringing it into contact with a PS plate in such a state, the leading edge of the projected proof reading mask is also brought into contact with a specified position on the surface of the PS 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 erasing apparatus for exposing a non-image portion at the periphery of an image-exposed printing plate.

[0002]

2. Description of the Related Art In the plate making process for making a printing plate for printing,
Printing plates such as photosensitive lithographic printing plates (hereinafter referred to as "PS plates")
The image recorded on the original film is printed by a printing device such as a stencil printing machine. The image was printed on P
When the S plate is developed, it is carried to the printing step and used as a printing plate for producing printed matter. PS like this
Various plate-making systems have been proposed which automatically perform a series of operations from image exposure of the plate to development processing.

On the other hand, in the positive PS plate, when the non-image portion of the peripheral edge is left unexposed, the ink adheres during printing to cause print stains and appear on the printed matter, impairing the finish of the printed matter. It's good. In order to prevent such printing stains, when image exposure is performed on a positive PS plate,
A burn-off process for exposing the non-image portion of the peripheral edge is performed.

Such a PS plate burn-off treatment is usually carried out by a breeder machine. To perform the burn-off treatment by the breeder machine, after removing the original film attached to the light source, It is necessary to move the mask largely, and in the case of a large-sized PS plate, one side must be exposed in multiple times. For this reason, the exposure time for one PS plate becomes long, which hinders the rapid breeding work. For this purpose, a burn-out device that specializes in burn-off processing may be used.

The burning-off apparatus is provided with a long light source unit capable of exposing one side of the maximum size PS plate at one time, and the four sides of the PS plate are sequentially faced to the light source unit and brought into close contact with each other. It can be processed.

On the other hand, in order to improve the finish quality of the printed matter, it is necessary to apply an appropriate amount of ink to the surface of the printing plate. This ink amount is an amount corresponding to the image being recorded. It is necessary to calculate the required ink amount for each PS plate, because different images have different ink amounts. In order to calculate the amount of ink used during printing, a pattern area ratio measuring device may be used.

This pattern area ratio measuring device divides the surface of the printing plate on which development processing has been completed into a large number of areas, and calculates the area or area ratio to which ink adheres during printing in each area. Therefore, it is possible to print with an appropriate ink amount by applying an amount of ink according to the calculation result.

By the way, using a pattern area ratio measuring device,
Even when trying to calculate an appropriate ink amount in each area of the PS plate, it is difficult to accurately measure the area ratio unless the image area and non-image area standards on the PS plate are clear with the picture area ratio measuring device. Is. Therefore, when the non-image portion on the periphery of the PS plate is burnt out, the unexposed portion is left as a calibration mark, and the unexposed portion and the exposed portion on the periphery are distinguished, so that the image is accurately recorded. There is one that allows the area or area ratio of a part to be calculated.

[0009]

However, in order to perform the burning-off treatment, it is necessary to bring the light source unit into close contact with the peripheral edge of the PS plate, but the light source unit is long and the weight is heavy. A large driving force is required for the vertical movement of the unit, and this weight acts on the surface of the PS plate and damages the PS plate, making it difficult to bring the light source unit into close contact with the PS plate. Further, in order to record the calibration mark used in the pattern area ratio measuring device on the PS plate, it is necessary to dispose a mask for the calibration mark between the light source unit and the PS plate.

The present invention has been made in consideration of the above facts, and enables the printing plate to be smoothly burnt out, and the printing plate can be easily provided with a calibration mark which serves as a reference when measuring the pattern area ratio. It is an object of the present invention to provide a printing plate burn-off device that can be formed at a predetermined position.

[0011]

According to a first aspect of the present invention, there is provided a printing plate blasting apparatus which comprises a platen for positioning and placing a printing plate having an image printed thereon, and a printing plate placed on the platen. A light source unit that exposes a non-image portion along any one side,
Rotation holding means for holding and rotating the printing plate positioned on the surface plate and provided in the central portion of the surface plate; and an arbitrary portion of the printing plate with the light source unit directed toward the rotation center of the rotation holding means. Of the light source in the light source unit, a light source driving means for moving the light source unit in parallel to one side, a baking frame which is provided in the light source unit and is movable up and down and can expose only a predetermined range of the printing plate. A shutter provided below the shutter for blocking light from the light source, and a baking frame driving unit for driving the baking frame up and down are provided to drive the baking frame driving unit to bring the printing frame into close contact with the printing plate. After that, the shutter is opened to burn off the non-image portion at the peripheral portion of the printing plate.

A printing plate burn-off device according to a second aspect is the printing plate burn-off device according to the first aspect, wherein the printing plate burn-off device is projected into the burning-off exposure area of the printing plate formed by the printing frame, and the printing is performed. It is characterized by having a calibration mark mask for forming a calibration mark by forming an unexposed portion in the burn-out exposure region of the plate.

According to a third aspect of the present invention, there is provided a printing plate burn-off device in which the lower surface of the calibration mark mask is flush with the lower surface of the printing frame. To do.

According to a fourth aspect of the present invention, there is provided a printing plate burn-off device according to the second or third aspect, wherein the calibration mark mask is movable in a direction orthogonal to the protruding direction. .

[0015]

According to the first aspect of the invention, the printing plate burn-off apparatus performs a burning process by exposing a predetermined area on the periphery of the printing plate positioned and placed on the surface plate by the light source unit. The light source unit is provided with a shutter and a baking frame, and the exposure of a desired area can be performed by opening and closing the shutter by moving the baking frame up and down by the baking frame driving means to bring it into close contact with the printing plate.

As described above, since only the baking frame is moved up and down without raising and lowering the light source unit, a small load is required when moving up and down, accurate movement is possible, and the surface of the printing plate is damaged even if they are brought into close contact with each other. There is no end.

In the printing plate burning apparatus according to the second aspect, the calibration mark mask is provided on the baking frame which is in close contact with the printing plate when burning out, and the calibration mark mask is projected as necessary. It is possible to accurately form an unexposed portion to be a calibration mark at a predetermined position on the peripheral edge of the printing plate to be burned off.

In the printing plate burning-out apparatus according to the third aspect, the lower surface of the calibration mark mask is provided so as to be flush with the surface of the printing plate which is the lower surface of the printing frame. Therefore, the calibration mark mask can be brought into close contact with the surface of the printing plate simply by lowering the baking frame by the baking frame drive means and bringing it into close contact with the surface of the printing plate.

In the printing plate burning-out apparatus according to the fourth aspect, the calibration mark mask can be moved in the protruding direction into the baking frame and in the direction orthogonal to the protruding direction.
As a result, it is possible to form the calibration mark at an arbitrary position regardless of the size of the printing plate and the width of the printing.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an automatic plate-making system 12 using a printing plate burning-off device (hereinafter referred to as "burning-off device 10") applied to this embodiment.

First, referring to FIG. 1, a schematic structure of the automatic platemaking system 12 will be described. In this automatic platemaking system 12, a plurality of platemaking machines 16 are arranged on one side of the rail 14 along the longitudinal direction of the rail 14 (FIG. 1).
Then only a part is shown). With this breeding machine 16, color images are displayed in Y (yellow), C (cyan), and M (magenta).
When a manuscript film (not shown) on which the images separated into the respective colors of the plate and the BK (sumi) plate are recorded, the image recorded on the manuscript film is printed (hereinafter referred to as “PS plate 2”).
It is baked at a predetermined plurality of positions (referred to as "0").

It should be noted that, in the automatic plate making system 12, when the document film is loaded in the plate making machine 16, the size, type, etc. of the PS plate 20 for exposing the image recorded on the document film are input. According to the input result, the breeding machine 16 requests the required PS plate 20. When the PS plate 20 is a positive type, the non-image portion of the peripheral edge of the PS plate 20 is exposed (hereinafter referred to as “burn-off”), and printing occurs when ink adheres to the peripheral edge of the PS plate 20 during printing. When it is necessary to prevent stains, data for burning out (data indicating an area or the like for burning out) is output.

The automatic plate version 12 includes rails 1
PS plate supplier 2 on the opposite side of breeding machine 16 across 4
2. A punch table 24 and a burn-out device 10 are arranged, and a bar code sticking device 28, an automatic developing machine 30, and a pattern area ratio measuring device 32 are sequentially arranged on the opposite side of the punch table 24 of the burn-off device 10. A belt conveyer 26 is arranged between the bar-code attaching device 28 and the automatic developing machine 30 as a sheet-shaped member conveying device. The PS plate 20 is conveyed from the burnout device 10 toward the pattern area ratio measuring device 32 (direction of arrow A). Also, on the rail 14, P
A transfer robot 18 that holds the S plate 20 by suction and can be transferred among the plurality of plate making machines 16, PS plate supply 22, punch table 24, and blasting device 10 is provided.

In the PS plate supplier 22, a plurality of trays 36 are arranged in a substantially box-shaped casing 34 so as to be shielded from light. Each tray 36 is formed by a floor plate 36A and a front panel 36B and is inclined at a predetermined angle, and a large number (for example, about 100) of PS plates 20 are stacked and placed on the surface on the rail 14 side. ing. It should be noted that only one type of PS plate 20 is placed on each tray 36,
Different PS plates 20 can be loaded between the plurality of trays 36. Further, each tray 36 is pushed out of the casing 34 by a driving means (not shown), so that the PS plate 20 placed on the tray 36 is directed to the rail 14 side.

The transfer robot 18 is provided with a base 38 that moves by engaging with the rails 14, and an arm portion 40 rotatably arranged on the base 38. The PS plate is provided at the tip of the arm portion 40. A suction frame 42 having a large number of suction cups for sucking and holding 20 is attached. The transfer robot 18 moves to an arbitrary position on the rail 14 by the base 38 engaged with the rail 14, and freely rotates the arm 40 and the suction frame 42 to move the suction frame 42 to a desired position and direction. It can be turned.

As a result, the transfer robot 18 has the P
The suction frame 42 is opposed to the tray 36 of the S plate supplier 22, and the P of the outermost layer placed on the tray 36 is placed.
The S plate 20 can be sucked and held, taken out, and moved toward the punch table 24.

The punch table 24 is provided with a punch platen 46 arranged horizontally, and the PS plate 20 is placed on the punch platen 46 by the transfer robot 18. On the punch surface plate 46, a plurality of punchers 48 for punching holes at predetermined positions of the PS plate 20, and the puncher 4 are provided.
A plurality of pushers (not shown) for positioning the PS plate 20 with respect to the PS plate 20 are provided.
A punch hole for positioning is formed. PS plate 20 in which punch holes are formed on the punch table 24
Are adsorbed and taken out by the transfer robot 18 and loaded into the breeding machine 16.

In the breeding machine 16, the images recorded on the loaded original film are sequentially exposed at predetermined positions of the PS plate 20, and the PS plate 20 after the exposure is taken out again by the transport robot 18. And is transported to the burn-out device 10.

In the burn-out apparatus 10, the turntable 50 and the burn-out light source unit 54 are provided on the surface plate 52, and the PS mounted by the transfer robot 18 is used.
When the plate 20 is a positive type, the non-image portions on the four sides of the PS plate 20 are exposed according to the data on the burning out output from the breeding machine 16. The burn-out device 10 will be described in detail later.

On the other hand, a guide rail 56 is stretched between the burn-out device 10 and the bar code attaching device 28. The guide rail 56 is provided with a transfer arm 60 having a plurality of suction cups 58. When the peripheral edge of the PS plate 20 placed on the surface plate 52 is sucked by the suction cup 58, the transfer arm 60 moves toward the bar code sticking device 28 by the driving force of the driving means (not shown),
The PS on the surface plate 52 is pulled by the transfer arm 60.
The plate 20 is conveyed to the barcode attaching device 28.

The bar code sticking device 28 is provided with a platen 62 on which the PS plate 20 conveyed from the burning out device 10 is placed, and a label is stuck on one end of the platen 62 opposite to the rail 14. A container 64 is provided. Also, surface plate 6
A plurality of fixing pins 66 are projectingly provided on the side of the rail 2 along the side opposite to the rail 14, and a fixing pin 68 is arranged at the end portion on the side opposite to the burnout device 26 so as to be retractable. Further, on the surface plate 62, a plurality of moving pins 70 and 72 are provided as pushers facing the fixed pin 66.
The movable pin 70 is provided so as to be retractable on the side of the burn-out device 10 and is movable in parallel along the elongated hole 74 toward the fixed pin 68. Further, the moving pin 72 is provided on the rail 14 side and can move parallel to the fixed pin 66 along the long hole 76.

Therefore, in the bar code sticking device 28,
When the PS plate 20 is placed on the surface plate 62, the fixing pins 68,
The moving pin 70 is projected and the moving pins 70, 72
Are moved along the long holes 74 and 76, respectively, and the PS plate 20 is brought into contact with the fixing pins 66 and 68, and the PS plate 20 is positioned with respect to the label applicator 64. In the PS plate 20 positioned on the surface plate 62 in this manner, an ID number of the PS plate 20 and a label (not shown), which is a bar code of which image is what color image of the PS plate 20, It is affixed to a fixed position on the non-image portion of the periphery.

In the bar code sticking device 28, the PS plate 20
When the label is attached to the fixed pin 68, the fixed pin 68 is tilted and retracted from the upper surface of the surface plate 62, and then the movable pin 70 is attached to the long hole 74.
Is further moved along and is sent out to the belt conveyor 26. The fixed pin 66 and the movable pin 7
For 0 and 72, the rotatable roller portion above the pin is the PS plate 2
It comes into contact with the peripheral edge surface of 0, which enables the PS plate 20 to move smoothly on the surface plate 62. Further, when the PS plate 20 is sent out to the belt conveyor 10, the fixed pin 66 and the moving pin 72 serve as guides to move the PS plate 20 straight toward the belt conveyor 10 along the conveying direction. .

The belt conveyor 26 is provided with a plurality of conveyor belts 78 whose upper end side is driven from the bar code sticking device 28 toward the automatic developing device 30. In this belt conveyor 26, when the leading edge of the PS plate 20 sent from the bar code sticking device 28 is detected, the conveyor belt 7
8 is started and the PS plate 20 is pulled in. Also,
When it is detected that the front end of the PS plate 20 has been sent out to the automatic developing device 30, the conveyor belt 78 is driven according to the conveying speed of the PS plate 20 in the automatic developing device 30, and the PS plate 20 is automatically developed. It is designed to be smoothly sent to 30.

The automatic developing machine 30 draws in the PS plate 20 fed from the belt conveyor 26, performs a series of processings such as a developing process, a desensitizing process and a drying process.
When the latent image formed by exposure is visualized, the latent image is sent to the pattern area ratio measuring device 32. In the pattern area ratio measuring device 32, for example, the image area of the PS plate 20 is divided into a plurality of areas, the amount of ink required for printing is calculated from the image area in each area, and the image area ratio is attached to the PS plate 20. The bar code is read from the label, and the bar coded information and the information such as the calculated ink amount are recorded on the information recording means such as a magnetic card.

In the picture area ratio measuring device 32, PS
Since a proof mark for defining the boundary between the image portion and the non-image portion is formed at a predetermined position on the peripheral portion of the plate 20, With this calibration mark as a reference, the required ink amount of the image recorded on the PS plate 20 can be accurately measured.

P discharged from the pattern area ratio measuring device 32
After the S version 20 is accumulated in a stocker (not shown),
It is sent to the printing process together with the above-mentioned information recording means.

Now, the burn-out apparatus 10 will be described in detail with reference to FIGS.

FIG. 3 shows a schematic plan view of the burn-out apparatus 10. In the burn-out device 10, the platen 52
The turntable 50 is provided in the center of the turntable 50.
80B and 80C are formed. These suction grooves 80
Each of A to 80C is selected according to the size of the PS plate 20 to be placed, and a negative pressure is supplied from the negative pressure supply means. Therefore, the PS plate 20 placed on the surface plate 52 is adsorbed and held on the tene table 50 by the negative pressure supplied to the adsorption grooves 80A to 80C.

The turntable 50 is mounted on the surface plate 52.
A plurality of pin groups of positioning pins 82A, 82B, and 82C are provided in pairs at predetermined intervals on the rail 14 side (upper side of the paper surface of FIG. 3) at the peripheral edge of. These positioning pins 82A to 82C are selected according to the punch holes punched by the punch table 24 on the PS plate 20 placed by the transfer robot 18, and are provided inside the apparatus below the surface plate 52. When the air cylinder is driven, it is projected onto the surface plate 52.

The transfer robot 18 mounts the PS plate 20 on the platen 5.
When the sheet is placed on the surface 2, the punching holes of the PS plate 20 are inserted by placing any of the positioning pins 82A to 82C protruding on the surface plate 52, and thereby the sheet is accurately placed. The PS plate 20 positioned at the position can be held by the turntable 50. In addition, the breeding machine 16
By using the punch holes used when printing the image on the PS plate 20, the PS plate 20 can be arranged at the same position as that which is positioned by the plate making machine 16,
The area in which the central image is formed and the peripheral non-image area can be accurately determined based on the data from the intaglio machine 16.

On the other hand, a pin group of positioning pins 84A, 84B and 84C is provided on the surface plate 52 so as to project toward the punch table 24. These positioning pins 84A to 84
C corresponds to the positioning pins 82A to 82C, respectively. For example, the PS plate 20 positioned by inserting the positioning pin 82A into the punch hole is positioned 90 counterclockwise in FIG.
By rotating the PS plate 20, the positioning pin 84C can be inserted into the punch hole of the PS plate 20.

Therefore, the PS plate 20 placed on the surface plate 52
By rotating the turntable 50 when positioned by the positioning pins 84A to 84C,
The positioning pins 82A to 82C can be the same as the positioning. These positioning pins 84A to 84C project when they are manually selected by an operation switch (not shown). As a result, the PS plate 20 can be accurately positioned on the surface plate 52 of the burn-out device 10 even by hand.

Therefore, as shown in FIG. 1, the rail 14 side of the burn-out apparatus 10 is within the moving area of the transfer robot 18, but the operator enters the punch table 24 side of the burn-off apparatus 10. A gap is provided so that the PS plate 20 can be placed on the burn-out apparatus 10 from the punch table 24 side. As a result, if the operation of the transfer robot 18 is stopped, the P
When mounting the S plate 20 on the surface plate 52, it is not necessary to go around to the rail 14 side, and the PS plate 20 can be easily mounted at a predetermined position on the surface plate 52 while holding the PS plate 20 in a horizontal state. It can be placed and positioned.

As shown in FIG. 3, the burn-out apparatus 10
A light source unit 54 is provided on the side opposite to the rail 14. Further, on the surface plate 52, rectangular elongated holes 86 are formed in pairs below both ends of the light source unit 54 toward the rail 14 side (direction of arrow B), and the light source unit 5 is provided.
4 is movable along the long hole 86 according to the size and area (width from each peripheral edge of the four sides) of the PS plate 20 to be burnt out.

The light source unit 54 is a PS plate 20 of the maximum size which is burnt out by the burnout apparatus 10.
It is longer than the dimension of one side, and P of any size
Even with the S plate, one side can be burnt out by one exposure.

FIG. 4 schematically shows the drive unit 88 of the light source unit 54 provided in the surface plate 52. The drive portion 88 is attached to a frame (not shown) and has a long hole 8
A long guide rail 90 arranged along the line 6 is provided. The light source unit 5 is attached to the guide rail 90.
A slide base 92 that movably supports one end of the slider 4 along the guide rail 90 is engaged. The drive units 88 are provided in pairs near the respective long holes 86, and hereinafter, only one of them will be described and the other will be omitted.

A pair of brackets 94 are attached to the slide base 92. Each bracket 94
The tip end of the is projected from the long hole 86 onto the surface plate 52, and is extended so as to be sandwiched along the moving direction of the light source unit 54 (the direction of arrow B). A fixed block 96 is attached to the tip of each bracket 94, and the fixed block 96 and the casing 100 of the light source unit 54 are
They are connected via a substantially L-shaped angle 88. On the other hand, the support shaft 102 is inserted and fixed to the fixed block 96 attached to the tip of the bracket 54.

As shown in FIG. 3, the support shaft 10
2 are arranged in pairs along the longitudinal direction of the light source unit 54 so as to be bridged over the brackets 94 protruding from the respective long holes 86. Each support shaft 1
A plurality of fixed blocks 96 are attached to the middle portion of 02, and the fixed blocks 96 and the casing 100 of the light source unit 54 are connected by an angle 98. Thereby, the light source unit 54 is suspended and supported by the respective slide bases 92 via the brackets 96.

As shown in FIG. 4, each slide base 92 has a standing wall 104 directed upward. This standing wall 104 is a long rack gear 10
6 is connected to one end side surface.

On the other hand, on the rail 14 side of the long hole 86 (on the left side in the drawing of FIG. 4), a pinion gear 110 and a guide roller 11 are attached to a base plate 108 attached to a frame (not shown).
2 is rotatably mounted. This pinion gear 1
Reference numeral 10 meshes with the rack gear 106, and the guide roller 112 holds the rack gear 106 between the pinion gear 110 and the guide roller 112 so as to be relatively movable.

This pinion gear 110 has the other long hole 8
It is also provided on the 6 side and is configured to rotate via the shaft 114. A traveling motor (not shown) that is driven with an accurate rotation amount is connected to an intermediate portion of the shaft 114. Therefore, when the pinion gear 110 is rotationally driven by the drive of the traveling motor, the rack gear 106
Move relative to each other while meshing with each other. With the movement of the rack gear 106, the light source unit 54 supported by the bracket 94 together with the slide base 92 is moved in parallel in the arrow B direction and the direction opposite to the arrow B direction with an accurate movement amount.

On the other hand, the slide base 92 is provided with an air cylinder 116 and a pair of guides 118 sandwiching the air cylinder 116, each of which is a frame mask 120 provided as a baking frame below the light source unit 54. Are linked to. This air cylinder 116
Normally, the drive shaft 116 </ b> A is projected so that the frame mask 120 approaches the light source unit 54 while being separated from the surface of the surface plate 52. Here, when the air cylinder 116 is driven to contract the drive shaft 116A, the frame mask 120 descends and abuts.

The frame mask 120 is formed with a baking opening 120A through which exposure light emitted from a light source unit 54, which will be described later, passes, and the peripheral edge of the PS plate 20 mounted and held on the surface plate 52. The frame mask 120 is lowered and brought into contact with a predetermined position of the portion, so that the light from the light source unit 54 is emitted only to a desired region.

The guide 118 has a role of a shock absorber, and when the frame mask 120 is lowered, the frame mask 120 is gently moved so as to come into contact with the surface of the PS plate 20. Also,
The lower surface of the frame mask 120 does not damage the surface of the PS plate 20 when it comes into contact with the PS plate 20.
A flexible member is attached and finished so that light does not unnecessarily leak from a step between the plate 20 and the surface of the surface plate 52 caused by the thickness of the plate 20.

FIG. 5 shows a schematic structure of the light source unit 54. The light source unit 54 includes the casing 1
00 has a long mercury lamp 122 along the longitudinal direction.
Is provided, and the reflector 1 is provided above the mercury lamp 122.
24 are provided. The upper side of the reflector 124 is
The heat shield duct 12 is covered with the heat shield duct 126.
A plurality of exhaust fans 128 and intake fans 130 are alternately provided at the upper end portion of 6 along the longitudinal direction.

Therefore, when the mercury lamp 122 is turned on, the air around the reflecting plate 124, which is heated by the heat radiation from the mercury lamp 122, is exhausted to the outside of the casing 100 by the exhaust fan 128 and is exhausted. It has become. Further, the intake fan 130 supplies the relatively cooled outside air outside the casing 100 to the periphery of the reflection plate 124, and at the tip of the intake fan 130,
The duct 130A is provided so that the sucked outside air is not directly exhausted by the exhaust fan 128.

On the other hand, a shutter 132 is provided below the mercury lamp 122. This shutter 13
2 has shafts 13 with brackets 134 at both ends.
6 is supported, and by rotating the shaft 136, the shutter 132 is rotated around the shaft 136 to retract from the light-shielding position below the mercury lamp 122 (for opening / closing operation). Open).

Each of the shafts 134 has a gear 13
8 is connected, and one gear 138 has an actuator 140 provided at one end side in the casing 100.
Is engaged with the gear 142 connected to the drive shaft. In addition, the gear 142 of the actuator 140 has a shaft 1 arranged along the longitudinal direction of the casing 100.
It meshes with a gear 146 attached to one end of 44.
The shaft 144 is also provided with a gear 146 at the other end, and the gear 146 at the other end meshes with a gear 138 attached to the shaft 136 at the other end of the shutter 132 via a gear 148. There is.

Therefore, by driving the actuator 140, the shafts 136 at both ends can be rotated to open and close the shutter 132. Note that an air motor using an air as a drive source of the actuator 140, an air cylinder, or the like may be used, or an electric motor driven by an electric signal may be used.

As shown in FIG. 4, the casing 100
An opening 150 having an opening through which the light from the mercury lamp 122 passes is formed in a lower part of the opening 150, and the opening 150 is a baking opening 120A of the frame mask 120.
Is inside. Therefore, by retracting the shutter 132 from below the mercury lamp 122 and opening the opening of the opening 150, the frame mask 120 is passed and only the desired area on the surface plate 52 is exposed to the mercury lamp 122.
It is possible to irradiate light from.

As shown in FIGS. 3, 6 and 7, the casing 100 of the light source unit 54 is provided with a pin 152 projecting from the distal end portion in the longitudinal direction. Below the pin 152, a bracket 154 protruding from the surface plate 52 is provided.
Are facing each other.

As shown in FIG. 6, the bracket 154
The opening is formed in a substantially U shape in which the opening is directed upward, and a receiving portion 156 curved in an arc shape is formed in the opening. Therefore, the bracket 154 is raised and the pin 152 is brought into contact with the receiving portion 156 so as to be housed, so that the light source unit 54 can be held at a predetermined position even when the angle 98 of the fixed block 96 is removed. You can do it.

The bracket 154 is a pair of guide rods 1 which are arranged parallel to each other and project from the inside of the surface plate 52.
It is attached to the tips of 58 and 160. An intermediate portion of the guide rods 158 and 160 is inserted into a guide bracket 164 attached to a frame (not shown) via a base plate 162, and a lower end portion thereof is connected by a block 166. Therefore, the guide rods 158, 1
The bracket 154 can be moved in the vertical direction by sliding the 60 integrally with the slide block 164 and relatively moving the same.

On the other hand, a rack gear 168 is attached to an intermediate portion of one guide rod 158, and a pinion gear 170 is meshed with the rack gear 168. The pinion gears 170 are respectively provided at the tip end portions of the shafts 170 arranged so as to be bridged between the respective guide rods 158 of the one bracket 154 and the other bracket 154 which are provided in a pair with the light source unit 54 interposed therebetween. It is adapted to rotate integrally with the shaft 172.

A deceleration box 174 is arranged adjacent to the intermediate portion of the shaft 172. A worm gear 176 meshing with each other is provided between the reduction box 174 and the shaft 172, and the rotational force of one can be transmitted to the other. A rotary shaft 178 is projectingly provided on the deceleration box 174, and a handle 180 is provided at a tip end of the rotary shaft 178. The handle 180 is projectingly provided outside the burnout device 10. It is designed to rotate from outside the machine (see Fig. 3).

The deceleration box 174 provided in this way
Is a rotating shaft 1 rotated by a handle 180
The rotation speed of 78 is greatly reduced, and the worm gear 176
It is designed to be transmitted to. Therefore, the handle 18
By continuing the light rotation of 0, the deceleration box 17
The shaft 172 is decelerated at 4 and the shaft 172 having a large rotational force is rotated. By the rotation of the shaft 172, the pinion gear 170 and the rack gear 168 relatively move while meshing with each other, and the bracket 164 gradually moves in the vertical direction.

That is, the light source unit 54 can be moved up and down by a light turning force. Further, when the bracket 154 is about to be pushed down due to the weight of the light source unit 54, the speed reduction mechanism inside the speed reduction box 174 acts as a load to prevent the shaft 172 from rotating and the bracket 154 is prevented from descending. There is.

On the other hand, as shown in FIG. 7, when the bracket 164 accommodates the pin 152 and holds it at a predetermined height, the light source unit 54 can be easily rotated about the pin 152. This allows the downwardly directed opening 150 to be laterally or upwardly oriented. Thereby, for example, maintenance inside the light source unit 54, such as replacement of the mercury lamp 122 through the opening 150, is possible.

As shown in FIG. 6, on the side walls of the bracket 154 and the casing 100, when the light source unit 54 is rotated about the pin 152 in a predetermined direction, the light source unit 54 becomes coaxial with each other and the locking pin. Through holes 184, 186 into which 182 can be inserted are provided, and by this, the light source unit 54 can be held in a state of being rotated in a predetermined direction. Also, this bracket 154
When the light source unit 54 is moved by the drive of the drive unit 88, the light source unit 54 moves downward and is in a retracted state so as not to hinder this movement.

As shown in FIG. 3, the light source unit 54
The calibration marker 2 covered by the cover 202 is located near the
00 is provided. The outline of the calibration marker 200 is shown in FIGS. 8 to 10. Note that the cover 202 is omitted in FIGS. 8 to 10.

As shown in FIGS. 8 and 9, the calibration marker 200 is provided at an intermediate portion in the longitudinal direction of the frame mask 120, and the base plate 206 having the guide rail 204 attached to the lower surface side is attached to the frame mask 120. It is fixed. As shown in FIG. 10, a slide block 208 is slidably engaged with the guide rail 204 toward the frame mask 120, and the slide block 208 has a rectangular calibration mark mask ( Hereinafter, referred to as "calibration mask 210") is attached. The calibration mask 210 has a rectangular plate shape, and has a platen 52.
The side (lower side) surface is provided on the same surface as the lower surface of the frame mask 12, and the tip end portion can project into the baking opening 120A along the lower surface of the frame mask 120.

As shown in FIG. 9, the base plate 206 has a bracket 2 provided on the frame mask 120 side.
A pulse motor 214 is attached via 12.
The pulse motor 214 is adapted to be accurately rotationally driven according to the number of pulses supplied, and a drive shaft 214A is vertically projected from the pulse motor 214. A pulley 216 is attached to a drive shaft 214A (not shown) protruding downward from the pulse motor 214. A pulley 220 is rotatably attached to the end of the base plate 206 opposite to the frame mask 120 via a bracket 218.
Between 16 and 220, endless timing belt 222
Is wrapped around.

As shown in FIG. 10, a bracket 224 attached to the calibration mask 210 is connected to the intermediate portion of the timing belt 222. Therefore, the timing belt 222 is rotated by the rotation of the pulse motor 214.
When is driven, the calibration mask 210 connected to the timing belt 222 moves along the guide rail 204 in the arrow B direction and the direction opposite to the arrow B direction. By this movement, the tip portion of the calibration mask 210 moves by an accurate movement amount, and the baking opening 120A of the frame mask 120
It is supposed to appear inside.

By the way, as shown in FIGS. 9 and 10, the base plate 206 is provided with brackets 224, 226, 228 near the pulse motor 214 and at the end opposite to the frame mask 120. Sensors 230, 232, 234 are attached to the brackets 224 to 228.
Is installed. Further, the calibration mask 210 has sensors 230, 2 at the end opposite to the frame mask 120.
A plate 236 facing 32 and a plate 238 facing the sensor 234 are attached.

In the sensors 230 and 232, the calibration mask 210 has the baking opening 12 of the frame mask 120, respectively.
The plate 236 is arranged so as to be detected when the plate 236 is detected when the plate 236 is moved to the limit position in the projecting direction toward 0A and the retracting direction.
The plate 238 is arranged to be detected when the calibration mask 210 is in the vicinity of the original position, which is the reference position when projecting into the baking opening 120A at the retracted position from A.

On the other hand, a disk-shaped slit plate 240 is connected to the tip of the drive shaft 214A protruding above the pulse motor 214. The slit plate 240 is provided with one slit hole (not shown) in the outer peripheral portion. The slit plate 2 is provided on the base plate 206.
A sensor 24 provided so as to sandwich the outer peripheral portion of 40 up and down.
2 is attached via a bracket 244, and this sensor 242 detects a slit hole (not shown) provided in the slit plate 240.

In the calibration marker 200, the sensor 234 is used.
After detecting the plate 238 by the sensor 242
The position where the slit hole of the slit plate 240 is detected by is set as the original position, and the calibration mask 2
When 10 is projected into the baking opening 120A, it can be accurately moved to a desired position.

The operation of the calibration marker 200 as described above is performed by using the PS plate 20 image-exposed by the plate-making machine 16 as the platen 52.
When mounted on the PS plate 20, the PS plate 20 is of a positive type and needs to be burned off at the peripheral edge, and when the pattern area ratio measuring device 32 calculates the amount of ink required for printing,
It is used when forming a calibration mark that serves as a reference for an image portion. The calibration mark is formed so as to have a predetermined area when the development processing is completed, by burning out the calibration mask 210 in a protruding state by a predetermined amount and setting it in a non-exposure state, and The image portion and the non-image portion can be accurately identified on the PS plate 20.

Next, the operation of this embodiment will be described. In the automatic plate transfer system 12, the PS plates 20 of a predetermined size are previously placed and mounted on each tray 36 of the PS plate supplier 22. Here, when the original film is loaded into the breeding machine 16 and the required size of the PS plate 20 is input, the breeding machine 16 loads the PS plate of the required size to the control device 44 of the automatic breeding system 12. Request. Automatic plate version system 1
The controller 44 of No. 2 uses the PS plate 20 of the requested size.
The tray 36 accommodating the PS plate 20 is pushed out from the casing 34, the transport robot 18 is moved, the suction frame 42 is opposed to the PS plate 20 stacked on the tray 36, and the PS plate 20 is suction-held and taken out. . The PS plate 20 taken out by the transfer robot 18 is transferred to the punch table 24, and when a punch hole is formed at a predetermined position, the PS plate 20 is loaded into the plate-making machine 16 and image exposure is performed. The PS plate 20 that has undergone image exposure is taken out from the breeding machine 16 by the transfer robot 18 and placed on the surface plate 52 of the burning-off apparatus 10, and the PS plate 20 that needs to be burnt-off from the breeding machine 16 is taken. Thus, when the data regarding the burn-out area is input, the burn-out processing is performed and the data is sent out to the barcode attaching device 28.

In the bar code sticking device 28, the PS plate 20
A bar code is attached at a predetermined position and sent out, and after continuous development processing and calculation of the pattern area, it is discharged to a stocker (not shown) and accumulated.

By the way, in the burn-out apparatus 10, the platen 5
When the predetermined positioning pins 82A to 82C are projected onto the sheet 2 and the PS plate 20 is received from the transfer robot 18, the PS plate 20 is sucked and held by the negative pressure supplied to the suction grooves 80A to 80C on the turntable 50.

On the other hand, the PS plate 20 that has been manually imagewise exposed
When placing the table on the surface plate 52, any of the positioning pins 84A to 84C can be manually projected so that the projecting positioning pins 84A to 84C can be inserted into the punch holes and mounted. It has become. In the burnout apparatus 10, since the positioning pins 84A to 84C are provided at positions where the positioning pins 82A to 82C are shifted by 90 ° about the rotation center of the turntable 50, the positioning pins 82A to 82C are used for substantially positioning. Like the above, it can be positioned manually.

When the PS plate 20 is manually placed, the positioning pins 82A to 82C are used to set the PS plate 20.
When it is attempted to position the PS plate 20, the PS plate 20 needs to be raised horizontally and wrap around to the rail 14 side, and a gap for the operator to enter must be provided between the rail 14 and the blasting device 10. Therefore, it is necessary to increase the distance between the burn-out devices 10. When the distance between the rail 14 and the burn-out device 10 is increased, the transfer robot 18
It is necessary to increase the length of the arm portion 40 of the robot. However, if this is done, the movement amount of the suction frame 42 that suction-holds the PS plate 20 increases and the driving force for driving each part of the transfer robot 18 increases. Therefore, the smooth and accurate transport of the PS plate 20 is hindered.

On the other hand, the PS plate 20 is viewed from a plurality of directions.
By making it possible to position the rail, it is not necessary to increase the distance between the rail 14 and the burn-out device 10. Further, the positioning of the PS plate 20 by hand is facilitated, and the operator does not have to go around to the rail 14 side while holding the PS plate 20.

In the burn-out apparatus 10 in which the PS plate 20 is adsorbed and held at a predetermined position on the turntable 50, the drive unit 88 is then driven to move the light source unit 54 to a predetermined position on the periphery of the PS plate 20. To move. Here, the air cylinder 114 is driven to lower the frame mask 120 and bring it into close contact with the peripheral surface of the PS plate 20.
It is possible to burn out a desired area on the periphery of the S plate 20.

At this time, since the air cylinder 114 raises and lowers only the frame mask 120 and holds the light source unit 54 at a predetermined height, the driving force is much smaller than that when the light source unit 54 is moved integrally. It is possible to move up and down. Further, when the frame mask 120 is brought into close contact with the surface of the PS plate 20, a large load is not applied to the surface of the PS plate 20, and it is possible to prevent the surface of the PS plate 20 from being damaged at the time of exposure by burning.

The mercury lamp 122 is in a lighting state with stable brightness until the light source unit 54 moves to a predetermined position, and the actuator 140 is operated to move the shutter 132 below the mercury lamp 122 for a predetermined time. By evacuating from, it becomes possible to perform the burning-off process with a stable light amount, and there is no occurrence of insufficient exposure.

When it is necessary to record a calibration mark on the periphery of the PS plate 20, the pulse motor 214 of the calibration marker 200 attached to the frame mask 120 is driven to move the calibration mask 210 before the frame mask 120 is lowered. To a predetermined amount in the baking opening 120A. At this time, the pulse motor 214 is accurately driven from the original position detected by the sensor 242 to project the tip of the calibration mask to a predetermined position.

As described above, since the calibration mask 210 is provided on the frame mask 120 and the lower surface of the frame mask 120 is aligned with the lower surface of the frame mask 120, the lowering operation of the frame mask 120 is enough to easily adjust the PS of the calibration mask 210. It can be brought into close contact with a predetermined position of the plate 20.

By carrying out such a burn-out treatment at each of the four edges of the PS plate 20 in accordance with the data from the plate-making machine 16, there is no need to perform a burn-out process in the plate-making machine 16. Further, since the PS plate 20 is positioned on the surface plate 52 by the same punch hole as the positioning of the PS plate 20 in the plate-making machine 16, it is substantially equivalent to the burning-out process in the plate-making machine 16. The burning process can be performed accurately with the accuracy of.

In the burn-out apparatus 10, the PS plate 20
Since it is possible to record the calibration mark at any position of, the pattern area ratio measuring device 32 arranged downstream can accurately calculate the ink amount and the like suitable for the printing process using the PS plate 20. It will be possible.

In this embodiment, the frame mask 12
Although the calibration marker 200 is fixed at a predetermined position of 0, it may be attached so as to be movable along the longitudinal direction of the frame mask 120. As a result, the calibration mark can be recorded at an arbitrary position on the periphery of the PS plate 20 required by the pattern area ratio measuring device 32.

Next, in the burn-out apparatus 10, when the brightness of the mercury lamp 122 becomes unstable, the mercury lamp 122 must be replaced, of course. Here, a case will be described in which the inside of the light source unit 54 such as the replacement of the mercury lamp 122 in the burnout device 10 applied to the present embodiment is performed.

In this operation, first, the block 154 is lifted by the rotation operation of the handle 180, and the pin 152 protruding from the casing 100 of the light source unit 54.
Are accommodated in the receiving portion 156 of the bracket 154. In this state, next, the angle 98 connecting the fixed block 96 and the casing 100 of the light source unit 54 is removed. At this time, it is more preferable to remove the wiring connecting the inside of the surface plate 52 and the light source unit 54,
This work can be eliminated by providing a margin for the length of the wiring and the like.

Then, the handle 180 is again rotated to raise the light source unit 54 to a position where the support shaft 102 and the like do not interfere even when the pin 152 is rotated. At this time, since the rotation of the handle 180 is greatly reduced by the deceleration box 174, even if the light source unit 54 is heavy upstream, the handle 180 can be lifted by a light rotation operation.

With the light source unit 54 lifted to a predetermined height, the pin 152 is rotated about its axis to move the casing 1
00 through hole 186 and bracket 154 through hole 184
The locking pin 182 is inserted at a position where is coincident with and the light source unit 54 is locked to the bracket 154. As a result, the opening 150 of the light source unit 54 is directed laterally or upward, and the mercury lamp 122 in the casing 100 can be easily taken out and inserted through the opening 150.

When the mechanism for lifting the light source unit 54 is not provided, the casing 100 is disassembled,
It is necessary to expose the mercury lamp 122. Particularly, in order to efficiently expose the PS plate 20, it is necessary to tightly surround the mercury lamp 122 with a reflection plate, and in order to expose the mercury lamp 122, it is necessary to remove these reflection plates. By allowing the mercury lamp 122 to be exposed from the side of the opening 150 that is not blocked by the reflector, the light source unit 54
Maintenance is extremely easy. When the maintenance of the light source unit 54 is completed, the light source unit 54 can be easily returned to the normal use state by the reverse operation.

The burn-out apparatus 1 applied to this embodiment
0 does not limit the configuration of the printing plate burning apparatus to which the present invention is applied. Further, the automatic plate making system 12 applied to this embodiment does not limit the application of the printing plate burning apparatus of the present invention, and the present invention can be applied to various plate making systems, instead of a plate making machine. In order to perform the burning process of the non-image portion of the periphery of the PS plate 20, it is only necessary to perform the exposure process of the image recorded on the original film by the plate making machine,
It is possible to achieve the efficiency of the breeding work in the breeding process.

[0100]

As described above, in the printing plate burn-off device of the present invention, since only the baking frame is moved up and down, a smaller driving force is required as compared with the case where the light source unit is moved up and down. Only certain areas of the printing plate can be exposed. Further, since the mask for the calibration mark is provided on the baking frame, it is possible to easily form the calibration mark serving as a reference for calculating the pattern area ratio at a predetermined position on the peripheral edge of the printing plate, and smoothly. It has an excellent effect that it can be burnt out.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an automatic plate version system applied to this embodiment.

FIG. 2 is a schematic plan view showing the connection between the burnout device and the bar code sticking device applied to this embodiment.

FIG. 3 is a schematic plan view showing a burnout device to which the present invention is applied.

FIG. 4 is a schematic side view showing a drive unit for a light source unit of a burnout device.

FIG. 5 is a schematic perspective view showing the inside of a light source unit.

FIG. 6 is a perspective view showing an outline of a lifting mechanism of a light source unit.

FIG. 7 is a schematic perspective view showing a state where a light source unit is lifted.

FIG. 8 is a schematic plan view showing a calibration marker provided in the burnout device.

FIG. 9 is a schematic side view of a calibration marker.

10 is a schematic cross-sectional view taken along the line 10-10 of FIG.

[Explanation of symbols]

 10 Burning-out device 12 Automatic plate-making system 16 Plate-making machine (printing device) 20 PS plate (printing plate) 32 Picture area ratio measuring device 50 Turntable (rotating and holding means) 52 Surface plate 54 Light source unit 88 Drive unit (light source drive) Means) 116 air cylinder (burning frame driving means) 120 frame mask (burning frame) 122 mercury lamp (light source) 132 shutter 200 calibration marker 210 calibration mask (calibration mark mask) 214 pulse motor 222 timing belt

Claims (4)

[Claims] 1. A surface plate for positioning and mounting a printing plate on which an image has been printed, and a light source unit for exposing a non-image portion along an arbitrary side of the printing plate mounted on the surface plate.
Rotation holding means for holding and rotating the printing plate positioned on the surface plate and provided in the central portion of the surface plate; and an arbitrary portion of the printing plate with the light source unit directed toward the rotation center of the rotation holding means. Of the light source in the light source unit, a light source driving means for moving the light source unit in parallel to one side, a baking frame which is provided in the light source unit and is movable up and down and can expose only a predetermined range of the printing plate. A shutter provided below the shutter for blocking light from the light source, and a baking frame driving unit for driving the baking frame up and down are provided to drive the baking frame driving unit to bring the printing frame into close contact with the printing plate. A printing plate burn-off device which later burns off the non-image portion at the peripheral edge of the printing plate by opening the shutter. 2. A calibration mark is formed by forming an unexposed portion in the burn-out exposure area of the printing plate, which is formed by the printing frame, and is projected in the burn-out exposure area of the printing plate. The printing plate burning-out apparatus according to claim 1, further comprising a mask for a calibration mark. 3. The printing plate burning-off apparatus according to claim 2, wherein the lower surface of the calibration mark mask is flush with the lower surface of the baking frame. 4. The printing plate burning-off apparatus according to claim 2, wherein the calibration mark mask is movable in a direction orthogonal to the protruding direction.