JPH1138515A - Method for adjusting printing plate printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the color slurring of a color printed matter in the case of using plural printing plate printers. SOLUTION: After ruled lines 15 are printed on the top side and the bottom side of a printing plate P by the respective printing plate printers, distances a1 , b1 , a2 , b2 , c1 and c2 between the 1st reference side 13A and the 2nd reference side 13B of the printing plate, and the ruled lines 15A and 15B are measured. Thereafter, an apron bar for positioning negative film, positioning pins 54 and 56 corresponding to the top side of the printing plate and a positioning pin corresponding to the bottom side thereof are positionally adjusted so that the difference of the measured result between the respective printers may be within a specified tolerance. Then, a puncher is positionally adjusted in the printer so that the positional deviation of notches 94A and 94B and a round hole 94C with respect to the 1st and the 2nd reference sides 13A and 13B may be within the specified tolerance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing plate printing apparatus for exposing a printing plate in accordance with an image recorded on an original film, and more particularly to a printing plate printing apparatus for printing a printing plate between a plurality of printing plate printing apparatuses. The present invention relates to a method for adjusting a printing plate printing apparatus for adjusting an image printing position.

[0002]

2. Description of the Related Art A printing plate is prepared by exposing a printing plate in accordance with an image recorded on a document film such as a negative film. When performing color printing, the color image
(Yellow), M (magenta), C (cyan) and BK
(Sumi) Negative film is prepared by separating each color of Y, M, and C according to the image of each negative film.
It is obtained by preparing printing plates of a plate and a BK plate, and overprinting with each printing plate.

[0003] In a large-scale printing factory, a plurality of printing plate printing apparatuses are used in order to prepare a large number of printing plates in a short time.

[0004] At this time, images of negative films of different colors obtained from the same image may be printed on a printing plate by a plurality of plate printing devices. At this time, if there is a machine difference between the plurality of printing plate printing apparatuses, the machine difference appears as a color shift in the printed matter.

[0005] In order to prevent such color misregistration of a printed material, it is necessary to use a single printing material printing apparatus when printing negative color images of different colors obtained from the same image onto a printing plate. However, despite the provision of a plurality of printing plate printing apparatuses, it has been difficult to improve the working efficiency.

In order to efficiently perform printing using a plurality of printing plate printing apparatuses, images of negative color films of different colors obtained from the same image may be printed on printing plates by different printing plate printing apparatuses. However, at this time, in order to prevent the occurrence of color misregistration or the like in the printed matter, it is necessary to suppress the machine difference between the plurality of printing plate printing apparatuses within a predetermined range where no color misregistration appears in the printed matter.

That is, in each printing plate printing apparatus,
Even if the negative film and the printing plate are accurately positioned, when positioning between the plate printing devices, if the error is within a predetermined error range with respect to the reference position, the color will be such that print quality is impaired. No deviation occurs, but if there is a shift in the reference position between the multiple printing plate printing devices, this reference position shift and a positioning error with respect to the reference position in each printing plate printing device are added, May cause large color shift.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances. When color printing is performed using a printing plate created by a plurality of printing plate printing apparatuses, color misregistration occurs in a printed matter. It is an object of the present invention to propose a method of adjusting a printing plate printing apparatus so as not to cause such an occurrence.

[0009]

The invention according to claim 1 is
The first reference side of the rectangular printing plate is connected to the first reference pin and the second reference side.
A printing plate positioning means for positioning the printing plate on the printing platen by abutting the second reference side orthogonal to the first reference side on the third reference pin while abutting the first reference side.
And a document positioning means for positioning and holding the document film, the document film being provided opposite to the first reference side of the printing plate. A method of adjusting a printing plate printing apparatus for adjusting a printing position of a document film, comprising: a first reference line along a first reference side and a second reference line along a second reference side of the printing plate as the document film. The image of the reference original on which the second reference line is formed is printed on a printing plate by each plate material printing device to form a reference image, and both ends of the first reference line of the reference image on the printing plate and the second image are formed. The printing plate printing is performed such that the difference between the first reference side and the distance between the second reference line and the second reference side is within a predetermined range between a plurality of printing plate printing apparatuses. Document positioning means for the first, second and third reference pins of the apparatus And adjusting the relative position for holding the original film.

According to the present invention, the first reference side of the printing plate is brought into contact with the first and second reference pins, and the second reference side is brought into contact with the third reference pin. Position on board. The original film is positioned on the printing plate on the printing platen by the original positioning means. Further, the printing position of the image of the original film on the printing plate can be adjusted by moving the holding position of the original film by the original positioning means.

In this manner, the first reference side of the printing plate and the first printing side printed on the printing plate are printed between the plurality of printing plate printing devices.
, And the first, second, and second printing plates in the respective plate printing apparatuses so that the spacing between the reference lines and the spacing between the second reference side of the printing plate and the second reference side printed on the printing plate substantially match. The document positioning means adjusts the relative position of holding the document film with respect to the third reference pin.

[0012] With this arrangement, even if the image of the original film is printed by any printing material printing apparatus, the image position on the printing plate coincides, so that no color shift occurs in the color print.

It is preferable that the interval between the first reference side and the first reference line and the interval between the second reference side and the second reference line among the plurality of printing plate printing apparatuses coincide with each other. The difference may be within a predetermined range, that is, within a range that does not substantially appear as a color shift.

According to a second aspect of the present invention, the plurality of printing plate printing apparatuses are configured such that each of the top side and the bottom side of the printing plate in which the first reference side is the top side is the printing platen. When the image of the original film is placed on the printing platen and printed on the printing plate, the image of the original film is printed on the top side of the printing plate, which is disposed adjacent to the ground side of the printing platen. A first surface plate on which a ground side is placed; and a top surface of the printing plate which is disposed adjacent to a top side of the printing platen and which is to be printed on the ground side of the printing plate when an image of the original film is printed. A second platen to be placed and a first reference pin for positioning the top side of the printing plate on the printing platen are provided on the printing platen, and a second reference pin and a third reference are provided. A first positioning means provided on the first surface plate with a pin; When the second and third reference pins for positioning are provided on the printing platen, and the first reference pin includes second positioning means provided on the second platen. A reference image is formed on the top side and the ground side of the printing plate by each plate material printing apparatus, and both ends of the first reference line on the top side and the ground side of the printing plate and the first The difference between the plurality of printing plate printing apparatuses is such that the distance between the reference sides and the distance between the second reference line on the top side and the ground side and the distance between the second reference sides are within a predetermined range. The first platen is vertically adjusted with respect to the printing platen along a direction perpendicular to the vertical direction, and the second platen is vertically aligned with respect to the printing platen. It is characterized in that the position adjustment is performed.

According to the present invention, the first reference line, the first reference side and the second reference line of the printing plate, and the printing plate are printed on the top side and the ground side of the printing plate by the respective printing plate printing apparatuses. And a first platen provided with second and third reference pins for positioning the top side of the printing plate so that the distance between the second reference sides of the printing plate coincides with each other, and positioning the ground side of the printing plate. The position of the second platen provided with the second reference pin for performing printing is adjusted with respect to the printing platen.

By moving the first platen relative to the top and bottom, the distance between the second reference line on the top side of the printing plate and the second reference side of the printing plate can be adjusted. Relative movement of the base plate and the second base plate along a direction orthogonal to the top and bottom directions, thereby the first reference line on the top side and the base side of the printing plate and the first reference side of the printing plate. The spacing can be adjusted.

Thus, even if the image of the original film is printed by any printing material printing apparatus, the image positions of the top side and the ground side of the printing plate coincide with each other. No color shift occurs in the color print.

According to a third aspect of the present invention, the first and the second
The platen is provided with first and second perforating means for perforating notches or punch holes used for positioning at the time of printing at the ground side end and the top side end of the printing plate. The printing plate is positioned by the first and second positioning means in the respective plate material printing apparatuses, and the first punching means and the second positioning means provided on the first platen are provided. A notch or a punch hole is formed in the printing plate by a second perforating means provided on the board, and a notch or a punch on a top side and a ground side of the printing plate with respect to a first reference side of the printing plate. The position of the first and second perforating means is adjusted along the direction perpendicular to the vertical direction so that the position of the punch hole is within a predetermined range between a plurality of printing material printing apparatuses. The position of the notch or punch hole on the top side of the printing plate with respect to the second reference side of the plate is duplicated. And adjusting the relative position of the second platen provided with the second perforating means with respect to the printing platen in the vertical direction so as to have a predetermined range of difference between the plate printing apparatuses. It is characterized by the following.

According to the present invention, printing is performed on the top side and the ground side of the printing plate by the first perforating means provided on the first base plate and the second perforating means provided on the second base plate. A notch or punch hole (round hole) is formed as a reference when making a decision.

By adjusting the positions of the first and second drilling means along the direction perpendicular to the vertical direction, a notch or a punch hole is drilled at a fixed position with respect to the first reference side. be able to. Further, by adjusting the relative position of the second surface plate with respect to the printing surface plate along the vertical direction, the position of the notch or punch hole formed on the top side of the printing plate with respect to the second reference side is adjusted. Can be.

Thus, a notch or a punch hole can be formed at a predetermined position on the printing plate as a reference for printing, and the position of the notch or the punch hole is shifted from the position of the image. It is possible to prevent color misregistration of a color print, and to obtain a color print with good finish quality.

[0022]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIGS. 1A and 1B show the flow of an original film and a photosensitive lithographic printing plate (hereinafter, referred to as "printing plate P") in a printing plate printing apparatus 10 applied to the present embodiment.
It shows the flow. In the plate printing apparatus 10, an original film (hereinafter referred to as "negative film 12") is attached to a cover sheet 14 for use.

As shown in FIG. 2, the cover sheet 14
Is formed in a thin rectangular shape with a transparent resin material, and the negative film 12 is positioned at the central portion and is attached thereto. In addition, the negative film 12 includes
For example, an image for one page of a newspaper is recorded.

The cover sheet 14 is provided with a hanging portion 18 at one end in the longitudinal direction, and a positioning bracket 20 at the other end. The suspending portion 18 is formed with two pairs of through holes 16A and 16B at predetermined intervals along the width direction of the cover sheet 14, and the positioning bracket 20 has a pair of positioning holes 20A and 20B. Is formed.

In the printing plate printing apparatus 10, the negative film 12 is conveyed integrally with the cover sheet 14 by using the through holes 16 A and 16 B of the hanging portion 18, and is transferred by using the positioning holes 20 A and 20 B of the positioning metal fitting 20. 12 is positioned on a printing platen 32 of a printing unit 30 described later.

The negative film 12 is covered with the cover sheet 1.
4, positioning marks 20 </ b> A and 20 </ b> B formed in the positioning metal fittings 20 of the cover sheet 14 with marks (register marks) recorded together with the images at predetermined positions on the negative film 12 in accordance with the image positions. Is performed in accordance with an index (not shown) formed at a predetermined position determined in advance. Thus, the negative film 12 can be accurately positioned on the printing platen 32 by using the positioning holes 20A in the printing plate printing apparatus 10.

As shown in FIGS. 1 (A) and 1 (B), the printing unit 30 includes a printing platen 32 provided at a central portion in a casing (not shown) of the printing plate printing apparatus 10. The light source unit 24 of the light source unit 22 is disposed above the printing platen 32. The light source unit 24 includes a light-shielding hood 26 and an elevating unit (not shown) that moves the light-shielding hood 26 up and down. Inside the light shielding hood 26, a light source lamp 28 such as a metal halide lamp is provided as a light source for exposing the printing plate P.

In the printing plate printing apparatus 10, a printing plate P is placed on a printing platen 32, and the negative film 1 is placed on the printing plate P.
Place the cover sheet 14 on which 2 is affixed and unfold it,
After the printing plate P is brought into close contact with the negative film 12 and the cover sheet 14 by squeezing means (not shown), the light shielding hood 26 is lowered to cover the upper surface of the printing plate P, and the light of the light source lamp 28 is irradiated. As a result, the printing plate P is exposed by the light transmitted through the negative film 12, and an image corresponding to the image recorded on the negative film 12 is printed.

In this embodiment, as an example of the printing plate P, the width dimension is about 400 mm and the longitudinal dimension is about 1100.
A long rectangular aluminum support having a length of mm was used, and a photosensitive layer was provided on one surface of the support to form a photosensitive surface. That is, as shown in FIG. 8, the printing plate P has a size such that an image of two pages of a newspaper can be printed in the longitudinal direction. Hereinafter, the longitudinal direction of the printing plate P is referred to as the top-to-bottom direction, and in the printing plate printing apparatus 10, the negative films 12 are provided on the top side (arrow TO direction side) and the ground side (arrow BT direction side) of the printing plate P, respectively. Is printed. The printing plate P is placed on the printing platen 32 with the photosensitive layer facing upward by one newspaper page. That is, the printing plate P is placed on the printing platen 32 in order from the top side and the ground side.

As shown in FIG. 1B, the cover sheet 14 to which the negative film 12 has been attached is loaded in a suspended state on the film loading section 34 of the printing plate printing apparatus 10, and the printing section 30 is inserted therefrom. Transported to In addition, printing section 3
When the printing process is completed at 0, the cover sheet 14 is conveyed to the film discharge unit 36 and is sequentially stocked while being suspended by the suspension unit 18.

On the other hand, as shown in FIG. 1A, the printing plate printing apparatus 10 is provided with a first punch 38 and a second punch 40 with a printing section 30 interposed therebetween. ,
Below the printing section 30 and the first punch section 38, a printing plate loading section 42 is provided. In the printing plate printing apparatus 10, the printing plate loading unit 4 is stacked on the skid 44 and substantially horizontally.
The printing plates P loaded in 2 are taken out one by one in order from the uppermost layer and transported so as to straddle the first punching unit 38 and the printing unit 30.

First punch 38 and second punch 4
In reference numeral 0, a punch surface plate 46 and a punch surface plate 48 are provided adjacent to the printing surface plate 32 of the printing portion 30. The printing plate P is
First, the first punch portion 38 is placed over the punch platen 46 and the printing platen 32 and placed. After this, the baking surface plate 32
The image recorded on the negative film 12 is printed on the top side of the printing plate P arranged on the upper side (the left side of the paper surface in FIG. 1A). Next, the printing plate P is sent to the second punch unit 40 side (the direction of the arrow E in FIG. 1A), and the printing platen and the second punching plate are set so that the ground side is on the printing platen 32. An image recorded on the negative film 12 is printed on the ground surface by being placed on the punch platen 48 of the unit 40. Thereafter, the printing plate is sent to the printing plate discharge unit 50 on the back side of the apparatus.

As shown in FIG. 3, the first punch 3
A puncher 52 and a positioning pin 54 are disposed on the punch platen 46 of No. 8 so as to face the ground-side end of the printing plate P. The punch platen 46 is provided with a positioning pin 56 facing one end of the printing plate P in the width direction so as to be able to protrude and retract.

On the printing platen 32, positioning pins 58 and 60 facing the widthwise end of the printing plate P and positioning pins 62 facing the ground side end of the printing plate P are respectively located at predetermined positions. It is provided so that it can appear and disappear. In addition, baking surface plate 3
2, a pusher 64 facing the top end of the printing plate P placed between the punch platen 46 and the punch platen 46 is provided so as to be able to protrude and retract. Is
Pusher 6 facing the other end in the width direction of printing plate P
6 are provided.

The printing plate P mounted on the printing platen 32 and the punch platen 46 is pressed by a pressing pin 66A of a pusher 66.
Is pressed toward the positioning pins 56, 60 (in the direction of arrow d), and the pressing claw 64A of the pusher 64 is pressed.
As a result, it is pressed toward the positioning pin 54 to perform positioning in the vertical direction and the width direction.

That is, as shown in FIGS. 9 and 10 (A), one side in the width direction of the printing plate P is a first reference side 13A, and the ground side of the printing plate P is a second reference side. Reference side 13 of
B, positioning pins 60, 56, and 54 are provided as first, second, and third reference pins, respectively, and together with pushers 64, 66, the top side of the printing plate P is positioned on the printing platen 32. Means (printing plate positioning means).

As shown in FIG. 3, a pusher 68 is disposed below the punch platen 46, and a pressing pin 70 of the pusher 68 is formed on the punch platen 46 along the vertical direction. It moves within the pair of elongated holes 72. The printing plate P is pressed by the pusher 68 toward the punch platen 48 (top side) (arrow E).
direction).

On the other hand, the punch platen 4 of the second punch section 40
8, a puncher 74 and a pusher 76 are provided corresponding to the top end of the printing plate P, and a positioning pin 78 facing one end in the width direction of the printing plate P is provided so as to be able to protrude and retract. ing. The punch platen 48 and the printing platen 32
Is provided with a pusher 80 facing the other end in the width direction of the printing plate P.

The printing plate P, which is moved by being pressed by the pusher 68 of the punch surface plate 46, is directed to the top side in the vertical direction by a transport means (not shown) provided between the punch surface plate 48 and the printing surface plate 32. Punch surface plate 4
8 and the printing platen 32. Thereafter, the printing plate P is pressed toward the positioning pins 58 and 78 by the pressing pin 80A of the pusher 80 (in the direction of arrow d), and is pressed toward the positioning pin 62 by the pressing pin 76A of the pusher 76 ( Arrow e direction). Thus, the printing plate P is positioned on the printing surface plate 32 on the ground side in the vertical direction and the width direction.

That is, as shown in FIGS. 9 and 10B, positioning pins 78, 58, and 62 are provided as first, second, and third reference pins, respectively, and printed together with pushers 76, 80. The positioning means for positioning the ground side of the plate P on the printing platen 32 is constituted.

As shown in FIG. 3, a moving platen 82 is disposed between the punch platen 48 and the printing platen 32 in the second punching section 40, and the printing plate after the printing process is completed. The plate P is discharged by moving the moving platen 82 toward the printing plate discharge unit 50 side. That is, the printing plate P on which image printing has been completed is substantially horizontally conveyed by moving the moving platen 82 toward the back of the apparatus from a state where the printing plate P is placed across the printing platen 32 and the punch platen 48 (see FIG. A) It is sent to the printing plate discharge unit 50 (in the direction of arrow F) and discharged (in the direction of arrow F).

In the printing plate printing apparatus 10, in parallel with printing of an image on the printing plate P, the printing plate P is driven by punchers 52 and 74 provided in the first and second punch portions 38 and 40.
A punch hole or a notch is formed at a predetermined position on the ground side and the top side of the printing plate P to be used as a reference and a positioning when the printing plate P is wound around a plate cylinder of a printing press.

As shown in FIG. 9, in this embodiment, a rectangular notch 94A is formed by the puncher 52 at the end of the printing plate P on the ground side, and the top side of the printing plate P is Rectangular notch 9 using puncher 74 at the end of
4B and a round hole 94C are formed.

On the other hand, as shown in FIGS. 4 and 5, an apron bar 86 is provided on a side surface of the printing platen 32. The apron bar 86 is provided with the reference pin 5 of the printing platen 32.
The longitudinal direction is arranged along the top and bottom direction of the printing plate P on the end side surface opposite to 8 and 60. This apron bar 8
6 is provided with a pair of through holes 88. As shown in FIG. 5, an air cylinder 90 is mounted below the printing platen 32.
A pair of locate pins 84 are attached to the distal end of the rod 90A via a flexible joint 92. The distal ends of the pair of locating pins 84 are inserted into the through holes 88A and 88B of the apron bar 86, and when the rod 90A of the air cylinder 90 is extended, the through holes 8 are formed.
The locating pin 84 projects from 8A and 88B.

The distance between the axes of the pair of locating pins 84, that is, the distance between the axes of the pair of through holes 88 formed in the apron bar 86, is determined by the positioning holes 20 A of the positioning fitting 20 attached to the cover sheet 14. This is the same as the distance between the axes of 20B.

As shown in FIG. 4, the printing plate printing apparatus 10
Then, when the cover sheet 14 is hung at a position where the pair of locating pins 84 face the positioning holes 20A and 20B of the positioning bracket 20, the air cylinder 90 is driven,
The locate pin 84 is made to protrude from the apron bar 86, and the positioning hole 20 of the positioning bracket 20 of the cover sheet 14 is
A, 20B. Thereafter, the positioning film 20 is pressed against the apron bar 86 by pressing means (not shown), thereby positioning and holding the negative film 12 together with the cover sheet 14 on the printing platen 32. The cover sheet 14 and the negative film 12 positioned and held with respect to the printing platen 32 are spread on the printing platen 32 so as to be wound around the printing plate P.

That is, the positioning bracket 20 of the cover sheet 14, the apron bar 86 and the pair of locating pins 84
Constitutes the original reference, and the negative film 12 includes the printing plate P positioned on the printing platen 32 based on the original reference.
Is positioned with respect to

In the printing plate printing apparatus 10, squeezing is performed to bring the upper surface of the printing plate P into close contact with the cover sheet 14 and the negative film 12, and the air between the printing plate P and the negative film 12 or the cover sheet 14 is squeezed. And air bubbles are removed. For this squeeze, for example, a general configuration of squeezing out the air entering under the negative film 12 by a squeeze roller (not shown) can be used, and a detailed description thereof will be omitted in the present embodiment.

On the printing platen 32, a position corresponding to the positioned printing plate P and a position corresponding to the negative film 12 or the negative film 12 and the cover sheet 14 protruding from the periphery of the printing plate P are illustrated. The printing plate P, the negative film 12, and the cover sheet 14 are sucked and held by the negative pressure supplied to the sucking groove.

A pair of side plates 96 are mounted on both sides of the printing platen 32 in the vertical direction.
6 is fixed to a frame (not shown) via a bracket 98.

As shown in FIG. 5, the apron bar 86
Stoppers 100 are attached to both end surfaces in the longitudinal direction of the device. A nut 102 is fixed to the side plate 96, and the adjusting bolt 10 screwed to the nut 102 is fixed to the side plate 96.
4 is in contact with the stopper pin 100. The apron bar 86 is moved along the vertical direction of the printing plate P with respect to the printing platen 32 by turning the adjustment bolt 104 to adjust the amount of protrusion from the nut 102.

With the movement of the apron bar 86 in the vertical direction, the through hole 88 formed in the apron bar 86 is also moved integrally, and the rod 90 of the air cylinder 90 is moved.
The projecting position of the locate pin 84 attached to A through the flexible joint 92 is moved along the vertical direction. The position of the negative film 12 on the printing platen 32 is adjusted along the vertical direction by moving the locate pin 84 in the vertical direction.

The apron bar 86 is attached to the printing platen 32.
By inserting the spacer 106 between the
The amount of protrusion from the printing platen 32 along the direction perpendicular to the top and bottom directions can be adjusted. This spacer 106
By inserting the apron bar 86 into each of both ends in the longitudinal direction, it is possible to adjust the amount of protrusion of each of the top side and the ground side.

Thus, the position along the direction perpendicular to the vertical direction of the negative film 12 when the negative film 12 is positioned on the printing platen 32 by bringing the positioning fitting 20 of the cover sheet 14 into contact with the apron bar 86. Is adjusted.

On the other hand, as shown in FIG. 6, the first punch portion 38 has a main base 112 and a sub base 114 arranged on a gantry 110 attached to a frame (not shown) of the plate printing apparatus 10. The punch surface plate 46 is mounted on a plurality of legs 116 erected from the sub base 114. Thereby, the punch platen 46
Of the upper surface of the printing platen 32 coincides with the height of the upper surface of the printing platen 32.

As shown in FIGS. 6 and 7, the punch platen 46 has a notch 118 on the ground side in the vertical direction of the printing plate P.
Are formed, and a plate 120 is attached so as to cover the notch 118. The puncher 52 is attached to the plate 120. Puncher 52
Are positioning pins 5 provided on the punch platen 46.
By adjusting the position of the plate 120 based on the positions of the punches 4 and 56, the puncher 5 with respect to the punch platen 46 is adjusted.
2 is performed.

[0058] Incidentally, as shown in FIG. 9, the notch 94A is formed in the land side of the printing plate P, the printing plate from the first reference edge 13A in the width direction of the one end side of the P length L ₁ The puncher 52 is formed at the position with respect to the positioning pin 56.
Is adjusted.

As shown in FIG. 6, the gantry 110 has
A pair of guide blocks 122 is attached to one end of the printing plate P in the width direction along the top and bottom directions. The main base 112 has a concave portion 124 cut out in a rectangular shape corresponding to the guide block 112, and the guide block 122 is in contact with the inner surface of the concave portion 124. As a result, the main base 112 is
The position along the width direction of the printing plate P is determined with respect to 0, and can be relatively moved along the vertical direction.

At the ground-side end of the main base 112, a rectangular block 126 is mounted.
, A block 128 facing the block 126 is attached. An adjustment screw 130 is attached to a block 128 attached to the gantry 110.
The tip of the adjusting screw 130 is screwed into the block 126 of the main base 112.
Is relatively moved with respect to the gantry 110 along the vertical direction.

The printing plate P is provided on the main base 112.
A pair of elongated holes 132A and 132B are formed at the ends in the width direction. Each of the long holes 132A and 132B has a long axis direction formed along the vertical direction of the printing plate P. Stand 1
A screw hole (not shown) is formed in 10 so as to face the long holes 132A and 132B. In one long hole 132A,
The fulcrum pin 134 is inserted, and the other long hole 132B is
Exen pins 136 are inserted and screwed to the gantry 110, respectively. Thereby, the main base 112 is fixed to the gantry 110.

The exen pin 136 can be inserted into the elongated hole 132B along the width direction of the printing plate P so that the main base 112 can be pivoted about the fulcrum pin 134 and the main base 112 can be moved relative to the gantry 110. Can rotate relative to each other. The fixing by the fulcrum pin 134 and the eccentric pin 136 is a so-called temporary fixing, and the temporarily fixed main base 112 is fixed to the gantry 110 by a plurality of screws (not shown).

A guide block 138 is attached to the ground-side end of the main base 112. The guide blocks 138 are arranged in pairs along the width direction of the printing plate P, and the ground-side end surfaces of the sub-base 114 abut on each of the pair of guide blocks 138.

A block 140 is attached to the sub-base 114 at the widthwise end of the printing plate P. A block 142 facing the block 140 is attached to the main base 112.
The tip of the adjustment screw 144 attached to the second base 2 is screwed into the block 140 of the sub base 114. Thus, by turning the adjusting screw 144, the block 140
At the same time, the sub base 114 is moved relative to the main base 112 along the width direction of the printing plate P.

The sub base 114 has a pair of elongated holes 146A and 146B formed at the top end of the printing plate P in the top and bottom direction. As for the long holes 146A and 146B, the long axis direction is along the width direction of the printing plate P, and one long hole (the long hole 14
6A) and the eccentric pin 136 inserted into the other long hole (long hole 146B).
The sub base 114 can be fixed (temporarily fixed) to the main base 112. The sub base 114 is rotatable relative to the main base 112 about a fulcrum pin 134.

As described above, in the first punch section 38, the main base 112 can be moved relative to the gantry 110 along the vertical direction of the printing plate P, and the sub base 114 is printed on the main base 112. The sub-base 114 and the main base 112 can be moved relative to each other along the width direction of the plate P.
The printing plate printing apparatus 10 is capable of rotating the punch platen 46 relative to the printing platen 32 in the vertical direction, the width direction, and the rotation direction of the printing plate P. You.

A slide bearing 148 is mounted on the lower surface of the punch base 46. The shaft 150 is inserted through the slide bearing 148.
A pin roller 152 serving as a positioning pin 56 is attached to the front end (upper end) of 50. The positioning pin 56
A pin roller 152 projecting from the through hole 154A formed in the punch platen 46 onto the punch platen 46 by the upward movement of the shaft 150 is opposed to the widthwise end surface of the printing plate P.

On the other hand, the lower end of the shaft 150 is connected to the tip of the rod 156A of the air cylinder 156. The air cylinder 156 is attached so that the axis of the rod 156A is parallel to the axis of the shaft 150. When the air cylinder 156 contracts the rod 156A, the shaft 150 is moved upward and the pin roller 152 is punched. It protrudes above the surface plate 46. Also,
The shaft 150 is connected to the rod 156 of the air cylinder 156.
A is moved downward by the extension of A, whereby the pin roller 152 projecting above the punch platen 46 enters a retracted state in which it is accommodated in the through hole 154A.

The positioning pin 54 facing the ground side of the printing plate P is formed by attaching a pin roller 152 to a flange plate 158. This positioning pin 54
By attaching the flange plate 158 to the lower surface of the punch platen 46, the pin rollers 152 project from the through holes 154 </ b> B formed in the punch platen 46 onto the punch platen 46.

The pusher 68 is mounted on the sub base 114. In the pusher 68, a pressing pin (pin roller) 70 is provided upright on a support bar 162 attached to the tip of a rod 160 </ b> A of the air cylinder 160. It is projected.

Two brackets 166 are arranged opposite to the bracket 164 to which the air cylinder 160 is attached, and between the brackets 164 and 166,
A pair of guide rods 168 whose axes extend along the top and bottom directions of the printing plate P are stretched. In addition, guide rod 1
A support bar 162 is inserted through 68 so as to be movable in the axial direction of the guide rod 168. Thus, the rod 160A of the extended air cylinder 160
Is contracted, the support bar 162 moves to the guide rod 168.
The pressing pin 70 is moved toward the top side in the long hole 72 while being guided toward the top side in the top and bottom direction.

On the other hand, as shown in FIG. 8, the second punch 40 has a frame 170 mounted on a frame (not shown), and a main base 172 and a sub-base 174 are arranged on the frame 170 in an overlapping manner. ing. A plurality of legs 176 are erected on the sub-base 174, and a punch surface plate 48 is fixed to the upper ends of the legs 176 by being spanned thereover. The height of the upper surface of the punch platen 48 is adjusted by the height of the legs 176, and
And the height of the upper surface are matched.

A substantially rectangular notch 178 corresponding to the top end of the printing plate P is formed on the punch platen 48, and the plate 180 is attached to the plate 180 so as to close the notch 178. A puncher 74 is attached. The puncher 74 is positioned and attached based on the position of the positioning pin 78 and the like. At this time, the position of the puncher 74 is adjusted by adjusting the mounting position of the plate 180 with respect to the punch platen 48.

[0074] As shown in FIG. 9, the notch 94B is formed in the top side of the printing plate P, the position of the length L ₁ from the first reference edge 13A in the width direction of the one end side of the printing plate P The puncher 74 is provided with the positioning pin 7.
It is adjusted position based on the position and length L ₁ of 8. Also,
The position of the round hole 94C along the width direction of the printing plate P is determined by adjusting the position of the puncher 74 along the width direction of the printing plate P because the interval between the notches 94B is determined. Further, the position of the round hole 94C along the top and bottom direction of the printing plate P is, as described later, the second reference side 13 of the printing plate P.
It is adjusted by moving the punch platen 48 in the vertical direction of the printing plate P based on the distance (length L ₂ ) between B and the center of the round hole 94C.

As shown in FIG. 8, the gantry 170
A guide block 182 is attached to one end of the printing plate P in the width direction. The guide blocks 182 are provided in pairs along the vertical direction of the printing plate P, and
72 has a recess 184 cut out in a rectangular shape corresponding to the guide block 182. The main base 172 has the guide block 1 on the inner surface of the concave portion 184.
The printing plate P is disposed so as to be relatively movable with respect to the gantry 170 along the vertical direction of the printing plate P by the guide block 182.

A rectangular block 186 is attached to the main base 172 at one end in the vertical direction, and a block 188 facing the block 186 is attached to the gantry 170. An adjustment screw 190 is attached to the block 188 of the gantry 170, and the tip of the adjustment screw 190 is screwed to the block 186 of the main base 172. By turning the adjusting screw 190, the main base 172 is moved relative to the mount 170 along the top and bottom along with the block 186 while the block 182 is in contact with the recess 184. Further, in the main base 172, elongated holes 192A and 192B are formed on the other end side of the printing plate P in the vertical direction. In the long holes 192A and 192B, the long axis direction is along the vertical direction of the printing plate P, and the long holes 192A and 192B have
The fulcrum pin 134 and the eccentric pin 136 are inserted. The main base 172 is mounted on a pedestal 170 around a fulcrum pin 134.
Relative to the fulcrum pin 1
The main base 172 is fixed (temporarily fixed) to the gantry 170 by screwing the exen pins 136 to the gantry 170.

A substantially cylindrical guide pin 194 is provided upright at the end of the main base 170 on the ground side in the vertical direction. The guide pins 194 are provided as a pair along the width direction of the printing plate P, and the ground-side end surface of the rectangular sub-base 174 is in contact with the guide pins 194.

A block 196 is attached to the sub-base 174 at one end in the width direction of the printing plate P.
A block 198 facing the block 196 is attached to the main base 172. Main base 1
An adjusting screw 200 whose tip is screwed into the block 196 of the sub base 174 is attached to the block 198 of the 72.

By turning the adjusting screw 200, the sub base 174 is guided by the guide pins 194 and relatively moved along the block 196 along the width direction of the printing plate P with respect to the main base 172.

The sub-base 174 has long holes 202A and 202B formed at the top end of the printing plate P along the top and bottom direction. The long holes 202A and 202B are formed so that the long axis direction is along the width direction of the printing plate P, and the fulcrum pin 134 and the eccentric pin 136 are respectively inserted.

The sub-base 174 is inserted into the elongated hole 202A and screwed to the main base 172.
Can be rotated relative to the main base 172 around the axis. The sub base 174 is provided with the fulcrum pin 13.
4 and the eccentric pin 136 inserted into the elongated hole 202B are screwed to the main base 172 to be fixed to the main base 172.

As described above, in the second punching section 40, the main base 172 can be moved relative to the gantry 170 along the vertical direction of the printing plate P, and the sub base 174 is printed on the main base 172. The sub-base 174 and the main base 172 can be relatively moved along the width direction of the plate P, and
70 is rotatable. As a result, the punch platen 48 moves the printing plate P
The position can be adjusted in the vertical direction, the width direction, and the rotation direction.

When the rod 156A of the air cylinder 156 is contracted, the shaft 150 inserted through the slide bearing 148 moves upward, and the positioning pin 78 provided on the punch surface plate 48 moves upward. The attached pin roller 152 is attached to the through-hole 20.
4 protrudes onto the punch platen 48. In addition, the positioning pin 78 moves the pin roller 152 to the shaft 150 by extending the rod 156A of the air cylinder 156.
Together with it, and retreats into the through-hole 204.

The pusher 76 provided on the punch base 48 is connected to the sub base 1 via the bracket 206.
74 is provided with an air cylinder 208.
In the air cylinder 208, a rod 208 </ b> A is disposed toward the top side in the vertical direction of the printing plate P, and the tip of a support bar 210 attached to the tip of the rod 208 </ b> A It protrudes above the surface plate 48. At the tip of the support bar 210, a pressing pin 76A urged by the coil spring 214 toward the top side of the printing plate P in the vertical direction is attached.

When the rod 208A of the air cylinder 208 is contracted, the pusher 76 pushes the pressing pin 76A.
Abuts against the top end surface of the printing plate P placed on the punch platen 48, and presses the printing plate P toward the ground in the top-to-bottom direction.

As described above, the plate printing apparatus 10 has the first
Surface plate 46 and second punch portion 4 of the punch portion 38 of FIG.
The position adjustment of rotating the punch platens 46 and 48 while moving each of the punch platens 48 relative to the printing platen 32 in the vertical direction of the printing plate P and in the width direction orthogonal to the vertical direction. Means are provided. In the printing plate printing apparatus 10, the positions of the punch bases 46 and 48 with respect to the printing base 32 in the top-to-bottom direction and the width direction are adjusted by these position adjusting means, so that the printing plate according to the adjustment position is adjusted. An image can be printed at a position on P.

Hereinafter, the adjustment of the image printing position on the printing plate P between the plurality of printing plate printing apparatuses 10 (hereinafter referred to as “machine difference adjustment”) will be described.

When adjusting the machine difference between the plurality of printing plate printing apparatuses 10, first, in each printing plate printing apparatus 10, the printing plate P corresponds to the first reference side 13A of the printing plate P. Are adjusted so that the straightness of the four positioning pins 56, 58, 60, 78 responsible for positioning along the width direction is within a predetermined tolerance range. In addition, positioning pins 56 to
The positions of the punchers 52 and 74 are adjusted so that the notches 94A and 94B are formed at predetermined positions of the printing plate P positioned by 60 and 78. Further, the position of the positioning pins 54 and 62 corresponding to the second reference side 13B of the printing plate P and responsible for positioning the printing plate P along the vertical direction is adjusted. At this time, the position of the puncher 74 (the punch platen 48) is also adjusted so that the round hole 94C on the top side of the printing plate P is formed at a predetermined position.

The positions of the positioning pins 56 to 60 and 78 for keeping the straightness within a predetermined tolerance range are within a tolerance of ± 0.
Should be within 1mm. Further, positioning pins 62 on the printing platen 32 used for positioning the second reference side 13B of the printing plate P.
The distance between the positioning pins 54 on the punch platen 46 becomes the printing plate pitch when printing an image on the printing plate P, and the positioning pins 62 are set so that the printing plate pitch is within a tolerance of ± 0.1 mm. , 54 are adjusted.

The straightness and the like are such that the punching platen 46 on which the positioning pins 56 are provided and the positioning pins 78 are provided for the positioning pins 58 and 60 provided on the printing platen 32. Printing plate P of punch surface plate 48
Movement along the top and bottom direction and the width direction, and the fulcrum pin 13
4, the main bases 112, 172 to the sub bases 114 for the mounts 110, 170, respectively.
The printing plate pitch can be adjusted by moving the punch platen 46 provided with the positioning pins 54 in the vertical direction with respect to the positioning pins 62 of the printing platen 32. Can be adjusted.

[0091] Various methods conventionally used can be applied for such adjustment of the printing plate printing apparatus 10, and a detailed description thereof will be omitted in the present embodiment.

In this way, the individual printing plate printing apparatuses 10
Is adjusted, the reference image is printed on the printing plate P by each plate printing device 10.

As the printing plate P, a high-precision printing plate having a straightness of within ± 0.1 mm and a perpendicularity between the first reference side 13A and the second reference side 13B of within ± 0.1 mm is used. . Also,
As shown in FIG. 2, on the negative film 12, ruled lines 15A and 15B are formed as reference images. Ruled line 1
5A and 15B, when printed on the printing plate P,
The printing plate P is substantially parallel to the first reference side 13A and the second reference side 13B. As the ruled lines 15A and 15B, for example, the ruled line 15 recorded as a newspaper frame can be used.

The negative film 12 on which the ruled lines 15A and 15B as the reference images are recorded is accurately positioned and adhered to the cover sheet 14, and is loaded into the respective plate printing devices 10 to print the printing plate P. Used for As a result, as shown in FIG. 9, ruled lines 15 (15A, 15B) are printed on the top and bottom sides of the printing plate P that has been printed by the respective plate material printing devices 10.

That is, in the printing plate printing apparatus 10, when the cover sheet 14 to which the negative film 12 is attached is loaded into the film loading section 36, the hanging section 18 of the cover sheet 14 is supported at a predetermined timing. Then, it is transported to a predetermined position of the printing unit 30. The cover sheet 14 conveyed to the printing section 30 is positioned on the positioning plate 20 by the printing platen 3.
2 is opposed to the apron bar 86 attached to the apron bar 2.
By driving the air cylinder 90 in this state, the locate pin 84 protrudes from the apron bar 86 and is inserted into the positioning holes 20A and 20B of the positioning bracket 20. Thereafter, the cover sheet 14 is held in a state of being positioned with respect to the printing platen 32 by sandwiching the positioning fitting 20 of the cover sheet 14 with the apron bar 86 by a pressing means (not shown).

Prior to (or in synchronization with) the transport of the cover sheet 14, the printing plate P loaded in the printing plate loading unit 42 is taken out of the printing plate loading unit 42 and transported to the printing unit 30. Are placed on the printing platen 32 and the punch platen 46 of the first punch section 38. Thereafter, the positioning pins 56, 60 are made to protrude, and the pushers 64, 66 are pushed out.
When the printing plate P is pressed toward the positioning pins 54, 56, and 60, and the top side of the printing plate P is positioned on the printing platen 32, the printing plate P is suctioned by a negative pressure supplied to a suction groove (not shown). Hold.

Next, in the printing plate printing apparatus 10, the cover film 14 positioned and held by the apron bar 86 is squeezed while being spread on the printing platen 32, and the negative film 12 is brought into close contact with the printing plate P. Let it. Thereafter, the printing plate P is exposed by light emitted from the light source lamp 28 of the light source unit 24, and the negative film 1 is placed on the top side of the printing plate P.
Print the second image.

Thereafter, the suction holding of the printing plate P on the top side is released, and the printing plate P is sent to the second punching unit 40, and the printing plate P is fixed to the printing platen 32 and the second punching unit 40. Board 48
And the positioning pins 58, 78, 62 are projected. Next, the printing plate P is pressed toward the positioning pins 58, 78, and 62 by the pushers 76 and 80, and the ground side of the printing plate P is positioned on the printing platen 32. The image on the negative film 12 is printed. In the printing plate printing apparatus 10, when the top side of the printing plate P is positioned on the printing platen 32, the printing plate P is
When a notch 94A is formed in the ground side end of the printing plate P and the ground side of the printing plate P is positioned on the printing platen 32, the puncher 7
4, a notch 94B and a round hole 94C are formed in the top end of the printing plate P.

The printing plate P on which images are printed on the top side and the ground side is sent to the printing plate discharge unit 50 and discharged.

The printing plate P discharged in this way has a ruled line 15 as a reference image on each of the top side and the ground side.
A and 15B are baked.

Next, the position of each printing plate P with respect to the first reference side 13A and the second reference side 13B of the reference image is measured. As shown in FIG. 9, this measurement is based on the distances a ₁ , b ₁ , and a ₁ from the first reference side 13A at both ends of the ruled line 15A for the ruled line 15 printed on the top side and the ground side of the printing plate P. ₂ , b ₂ and the distances c ₁ , c ₂ from the second reference side 13B of the ruled line 15B are measured.

Next, the printing plate printing apparatus 10 is adjusted based on these measurement results. At this time, the distance a ₁ ,
b ₁ , a ₂ , b ₂ , c ₁ , and c _{2 correspond} to each plate material printing apparatus 10.
Is performed so that the difference between the values falls within a predetermined range.

The procedure for adjusting the machine difference will be described below. First, the positioning of the negative film 12 with respect to the positioning pins 58, 60 and the positioning pins 62 on the printing platen 32 is performed. At this time, since the positions of the positioning pins 58 to 62 have been determined, the position of the negative film 12 with respect to the positioning pins 58 to 60 is adjusted by adjusting the apron bar 86 responsible for positioning the negative film 12.

That is, FIGS. 10A and 10B
As shown in the figure, the positioning pins 56, 58, 60, 7
If the straightness of the apron bar 8 is within a predetermined tolerance range,
6 are moved along the width direction of the printing plate P so that the distances a ₁ , b ₁ , a ₂ , b
₂ can be adjusted. In particular, this apron bar 8
6, the position of the negative film 12 is adjusted so that the distance a ₁ and the distance b ₂ coincide with each other in the plate printing apparatus 10.

Adjustment of the position of the negative film 12
The distance a for each plate printing apparatus 10 ₁And distance b_TwoEqual
The protruding amount of the apron bar 86 is adjusted so as to become smaller. This
As a result, the negative film 12 placed on the printing plate P
Can be adjusted along the width direction of the printing plate P.
You. Also, the amount of protrusion at both ends in the longitudinal direction of the apron bar 86
The negative positioned on the printing plate P by changing
The film 12 can be given a rotation.

For example, to reduce the distance a ₁ ,
A spacer 106 is added between the top side of the apron bar 86 and the printing platen 32 so that the top side of the apron bar 86 is separated from the printing platen 32. The distances a ₁ and b at this time
₂ is set so as to be within a predetermined tolerance range (within 0.05 mm) among a plurality of printing plate printing apparatuses 10 for performing machine difference adjustment.

Thus, each printing plate printing apparatus 1
At 0, the ruled line 15A printed on the printing plate P is parallel to the first reference side 13A of the printing plate P, and the distance from the first reference side 13B is equal.

Next, the position of the negative film 12 is adjusted along the vertical direction of the printing plate P based on the distance c ₂ . That is, among the plurality of the plate material printing apparatus 10 for performing instrumental error adjustment, the distance so that c ₂ is a predetermined tolerance range (within 0.05 mm), the vertical direction of the apron bar 86 longitudinally (printing plate P ).

The movement of the apron bar 86 is controlled by the side plate 96.
The adjustment is performed by inserting and removing an adjustment bolt 104 protruding toward the apron bar 86. Apron bar 86
Is moved along the vertical direction of the printing plate P,
The through hole 88 formed in the apron bar 86 also moves,
The projecting position of the locate pin 84 moves along the vertical direction of the printing plate P. The negative film 12 is positioned along the vertical direction of the printing plate P by the locate pins 84.

After the position of the negative film 12 has been adjusted between the printing plate printing apparatuses 10 in this manner, the printing plate pitch is adjusted.殖版pitch is determined by the distance c ₁ is the distance of the top side of the border 15B and the earth side of the border 15B of the printing plate P.

As shown in FIG. 9, the distance c ₁ is the distance between the ruled line 15B printed on the top side and the second reference side 1 of the printing plate P.
It is determined by the distance c ₃ and the distance c _{2 of} 3B. FIG.
0 (A) and FIG. 10 (B), the distance c ₁
Are the positioning pins 62 on the printing platen 32 and the punch platen 4
6 is the distance between the positioning pins 54 (the distance between the axes).
It can be adjusted by moving the punch platen 46 in the vertical direction of the printing plate P.

As shown in FIG. 6, when the punch platen 46 is moved along the vertical direction of the printing plate P, the main base 112 is moved along the guide block 122 by turning the adjusting screw 130. Move up and down. This movement of the main base 112 causes the punch platen 46 to move in the vertical direction of the printing plate P. When increasing the distance c ₁ is殖版pitch, it is sufficient to move the main base 112 to the ground side, when narrowing the distance c ₁ may be moved to the main base 112 to the top side of the printing plate P.

Next, based on the measured distances b ₁ and a ₂ , the punch platens 46 and 48 are adjusted in position along the width direction of the printing plate P. That is, the punch platens 46 and 4 are set so that the distances b ₁ and a ₂ are equal to the distances a ₁ and b _2.
8 along the width direction of the printing plate P,
The positions of the positioning pins 56 and 78 are adjusted.

As shown in FIG. 10A, since the position of the positioning pin 60 is determined, the distance b ₁ is determined by the position of the positioning pin 56 of the punch base 46. In addition, as shown in FIG.
Has a fixed position. Therefore, the punch platen 46,
By moving each of 48 along the width direction of the printing plate P, the distances b ₁ and a ₂ can be adjusted.

As shown in FIG. 6, the movement of the punch platen 46 along the width direction of the printing plate P is performed by the main base 112.
Adjustment screw 14 provided between the
This is done by turning 4. That is, sub-base 1
14 is moved along the width direction of the printing plate P along the guide block 138 by turning the adjustment screw 144, and the punch platen 46 is integrated with the
Move along the width direction of.

As shown in FIG. 8, the punch platen 48 is rotated by turning an adjusting screw 200 provided between the main base 172 and the sub-base 174 to rotate the sub-base 1.
By moving 74 along the width direction of the printing plate P along the guide pins 194, it moves along the width direction of the printing plate P integrally with the sub-base 174.

As described above, the ruled lines 15A and 15B printed on the top side and the ground side of the printing plate P and the first
The distance between the reference side 13A and the second reference side 13B is measured,
By adjusting the position of the negative film 12 and adjusting the printing position of the negative film 12 in accordance with the measurement result, the first reference side 13A and the second reference side 13A of the printing plate P can be used in any of the printing plate printing apparatuses 10. The image of the negative film 12 can be printed at a fixed position with respect to the reference side 13B.

After adjusting the printing position of the image of the negative film 12 among the plurality of printing plate printing devices 10 in this way, the notches 94A,
The positions of the holes 94B and 94C are adjusted.

At this time, each printing plate printing apparatus 1
0, the top side of the printing plate P is positioned on the printing platen 32,
After punching out a notch 94A at the ground-side end of the printing plate P by the puncher 52, the ground side of the printing plate P is positioned on the printing platen 32, and the top-side end of the printing plate P is A notch 94B and a round hole 94C are formed by the puncher 74. At this time, the work of printing the image on the printing plate P is unnecessary.

The center positions of the notches 94A and 94B from the reference side 13A of each printing plate P measure the distances d ₁ and d _2, and the measured distances d ₁ and d ₂ respectively become the length L _1. As described above, the position adjustment is performed by moving the punchers 52 and 74 for the punch platens 46 and 48 along the width direction of the printing plate P.

Next, the distance d ₃ between the center (axial center) of the round hole 94C and the second reference side 13B of the printing plate P is measured, and the punch is fixed so that the distance d ₃ becomes the length L _2. The board 48 is moved along the vertical direction of the printing plate P.

[0122] As shown in FIG.
2 is an adjusting screw 19 provided between the frame 170
By turning 0, the printing plate P moves in the vertical direction along the guide block 182. The punch platen 48 moves along the top and bottom directions of the printing plate P integrally with the main base 172. Distance d measured by this main base 172
By moving on the basis of ₃ and length L _2, the position along the vertical direction of the printing plate P of the puncher 74, i.e., it is possible to adjust the position of the round hole 94C which is bored in the plate P.

In this way, a plurality of plate printing apparatuses 10
Is adjusted so that the image of the negative film 12 is printed on the printing plate P by any printing material printing apparatus 10.
The ruled lines 15A and 15B are located within a predetermined tolerance (0.05 mm) with respect to the first reference side 13A and the second reference side 13B. Further, in any of the plurality of printing plate printing apparatuses 10, the first reference side 13A and the second reference side 1A of the printing plate P are used.
A cutting plate used for positioning the printing plate P at substantially the same position (position where the lengths L ₁ and L ₂ are within a predetermined tolerance (0.05 mm)) with respect to 3B when the printing plate P is mounted on a rotary press for printing. Chipping 94
A, 94B and a round hole 94C can be formed.

Thus, regardless of the image printed by any of the printing material printing apparatuses 10, the tolerance that substantially does not cause color misregistration when performing color printing can be set to within 0.1 mm. .

Therefore, even if image printing of the color-separated negative film 12 for obtaining a color image is performed by using a plurality of printing material printing apparatuses 10 which have been adjusted as described above, color misregistration may occur in printed matter. Will not cause. That is, since the machine differences between the image printing positions and the positions of the notches or punch holes among the plurality of plate printing devices 10 are kept within a predetermined range, the images are printed by these plate printing devices. Even when color printing is performed by a printing plate, the deviation of the image printing position between the printing plates on which the color-separated images are printed is suppressed to a range that does not substantially appear as color misregistration on the color print. Therefore, no color shift occurs in the printed matter.

The plate printing apparatus 10 applied to the present embodiment is an example of a plate printing apparatus to which the present invention is applied, and the plate printing apparatus 10 is a plate printing apparatus to which the present invention is applied. The material baking device is not limited.

According to the present invention, the printing plate is positioned on the printing platen by the first, second and third reference pins provided corresponding to the first and second reference sides of the printing plate, and the original is positioned. By positioning the original film on the printing platen by the means, the original film can be positioned on the printing plate and applied to a printing plate printing apparatus configured to print the image of the original film on the printing plate.

That is, in this embodiment, a printing plate printing apparatus for printing an image on a printing plate P (printing plate having a size of two vertical pages of newsprint) on which an image of the negative film 12 is printed on each of the top side and the ground side. Was explained using, but not limited to this,
Two images of the negative film 12 are placed on the top side and the ground side, respectively.
The present invention can also be applied to a printing plate printing apparatus that prints an image on a printing plate (for example, a size of four pages of newspaper) that can be printed each time.

Also in this case, if the printing plate is positioned using the first reference side at one end in the width direction and the second reference side at one end in the vertical direction, the first reference side is used. And the second
The first image printed on each image printing area for the reference side of
The positioning position of the printing plate and the positioning position of the negative film may be adjusted so that the distance between the reference line and the second reference line falls within a predetermined tolerance range.

Although the present invention has been described as adjusting the machine difference between plate printing apparatuses having the same configuration, any printing apparatus which positions the printing plate using the first to third reference pins can be used. The present invention can be applied even if the printing plate transport, the original film transport, and the original film positioning method are different.

For example, the printing plate printing apparatus to which the present invention is applied does not need to include a puncher for forming notches or punch holes at both ends in the vertical direction of the printing plate. Also, it has been described that the negative film which is the original film is pasted on the cover sheet and positioned on the printing platen.However, in order to position the negative film on the printing platen at a predetermined position of the non-image portion of the negative film. The present invention can be applied to plate material printing apparatuses of various configurations such as forming a punch hole and transporting a negative film by itself without using a cover sheet and positioning the negative film on a printing platen.

[0132]

As described above, according to the present invention, an original film can be positioned at a fixed position on a printing plate positioned on a printing platen by any of a plurality of printing plate printing apparatuses. Further, in the present invention, any of a plurality of printing plate printing apparatuses can position fixed positions on the top side and the ground side of the printing plate on the printing platen. Further, in the present invention,
Notches or punch holes can be formed at predetermined positions on the top side and the ground side of the printing plate.

As a result, it is possible to print the image of the original film at a predetermined position on the printing plate, to prevent color misregistration occurring in the printed matter when performing color printing, and to obtain a color printed matter having a good finish quality. The excellent effect can be obtained.

[Brief description of the drawings]

FIG. 1A is a schematic diagram showing a processing flow of a printing plate in a plate printing apparatus applied to the present embodiment, and FIG. 1B is a schematic diagram showing a processing flow of a negative film.

FIG. 2 is a schematic perspective view showing a cover sheet used for conveying and positioning a negative film.

FIG. 3 is a schematic plan view showing the arrangement of a punch surface plate and a printing surface plate.

FIG. 4 is a schematic perspective view showing a printing platen and a cover sheet on which a top side of a printing plate is arranged.

FIG. 5 is an exploded perspective view of a main part showing a schematic configuration near a printing surface plate.

FIG. 6 is an exploded perspective view of a main part showing a schematic configuration of a first punch unit.

FIG. 7 is a perspective view of a main part showing a puncher attached to a punch surface plate.

FIG. 8 is an exploded perspective view of a main part showing a schematic configuration of a second punch portion.

FIG. 9 is a schematic plan view showing a printing state of a reference image on a printing plate.

10A is a schematic plan view showing positioning of the printing plate on the top side and an image printing position, and FIG. 10B is a schematic plan view showing positioning of the printing plate on the ground side and an image printing position.

[Explanation of symbols]

Reference Signs List 10 plate printing device 12 negative film (original film) 13A first reference side 13B second reference side 14 cover sheet 15A ruled line (first reference line) 15B ruled line (second reference line) 20 positioning bracket 32 printing Surface plate 46 Punch surface plate (first surface plate) 48 Punch surface plate (second surface plate) 52 Puncher (first drilling means) 54 Positioning pin (third reference pin, first positioning means) 56 positioning pin (second reference pin, first positioning means) 58 positioning pin (second reference pin, second positioning means) 60 positioning pin (first reference pin, first positioning means) 62 positioning Pin (third reference pin, second positioning means) 74 Puncher (second drilling means) 78 Positioning pin (first reference pin, second positioning means) 84 Locate pin Original positioning means) 86 apron bar (original positioning means) 94A, 94B notch 94C punched holes P printing plate

Claims (3)

[Claims] 1. A first reference side of a rectangular printing plate is brought into contact with a first reference pin and a second reference pin, and a second reference side orthogonal to the first reference side is set to a third reference side. A printing plate positioning means for abutting the reference plate on the printing plate to position the printing plate on the printing platen; and a document film provided to face the first reference side of the printing plate for positioning and holding the document film. Document positioning means, and a plurality of plate material printing devices each comprising a plate material printing device adjustment method for adjusting the printing position of the original film on the printing plate, wherein the original film as An image of a reference original on which a first reference line along a first reference side and a second reference line along a second reference side of the printing plate are formed, and printed on the printing plate by the respective printing plate printing apparatuses. A reference image is formed, and a first reference line of the reference image on the printing plate is formed. The distance between both ends and the first reference side and the distance between the second reference line and the second reference side are respectively set so that the difference between the plurality of printing plate printing apparatuses is within a predetermined range.
A method for adjusting a printing plate printing apparatus, wherein the document positioning means of each printing plate printing apparatus with respect to the first, second, and third reference pins adjusts a relative position of holding a document film. 2. The printing plate printing apparatus according to claim 1, wherein each of the printing plate printing apparatuses mounts on the printing platen each of a top side and a bottom side of the printing plate in which the first reference side is the top side. When printing the image of the original film, the printing plate is placed adjacent to the ground side of the printing platen, and the printing plate is placed on the top side of the printing plate when the image of the original film is printed. First
And a second surface plate which is disposed adjacent to the top side of the printing platen and on which the top side of the printing plate is placed when printing the image of the original film on the ground side of the printing plate. And a first reference pin for positioning the top side of the printing plate on the printing platen is provided on the printing platen, and a second reference pin and a third reference pin are provided on the first platen. The first provided in
Positioning means, and second and third reference pins for positioning the ground side of the printing plate on the printing platen are provided on the printing platen, and the first reference pin is provided on the second printing plate. And second positioning means provided on the board,
A reference image is formed on the top side and the ground side of the printing plate by each plate material printing device, and both ends of the first reference line on the top side and the ground side of the printing plate and the first reference line, respectively. The printing is performed such that a difference between a plurality of printing material printing apparatuses in a distance between sides and a distance between the second reference line on the top side and the ground side and the second reference side is within a predetermined range. The first platen is vertically adjusted with respect to the platen along a direction orthogonal to the vertical direction, and the second platen is positioned with respect to the printed platen along the vertical direction. The method for adjusting a printing plate printing apparatus according to claim 1, wherein the adjustment is performed. 3. A first notch or a punched hole, which is used for positioning at the time of printing, is formed in the first and second platens at the ground end and the top end of the printing plate. Second and third
When the perforating means is provided, the printing plate is positioned by the first and second positioning means in each plate material printing apparatus, and the first printing plate is provided on the first platen.
A notch or a punch hole is formed in the printing plate by the perforating means and the second perforating means provided in the second platen, and the printing plate is cut with respect to a first reference side of the printing plate. Along the direction perpendicular to the vertical direction of the first and second perforating means, so that the positions of the cutouts or punch holes on the top side and the ground side are within a predetermined range between the plurality of plate printing apparatuses. And adjusting the position of the notch or punch hole on the top side of the printing plate with respect to the second reference side of the printing plate so that the position of the notch or the punched hole is within a predetermined range among a plurality of printing plate printing apparatuses. Second
3. The method for adjusting a printing plate printing apparatus according to claim 2, wherein a relative position of the second platen provided with the punching means with respect to the printing platen in the vertical direction is adjusted.