JP2000098623A - Plate material printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to take an original film stuck to auxiliary fittings for films by tacky adhesive films out of a surface plate without peeling this film. SOLUTION: The negative film N is positioned and placed to the stationary surface plate 28 of a sticking section. A negative bar 16 is placed on this negative film and after the tacky adhesive tape 40 is stuck in a long hole 38, the negative film is raised together with the negative bar and is taken out of the stationary surface plate. Extension grooves 48, 50 communicating with attraction grooves arrive at the neighborhood of the position facing the long hole in the stationary surface plate 28 and the air is intruded between the negative film placed with the negative bar and the stationary surface plate 28 from the extension grooves via the attraction grooves by raising the negative film, by which the negative film is raised without peeling from the negative bar.

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 printing an image recorded on an original film such as a negative film onto a printing plate, and more particularly, to positioning of an original film in the printing plate printing apparatus. The present invention relates to a printing plate printing apparatus which prevents a film auxiliary bracket used for conveyance from sticking to a surface plate.

[0002]

2. Description of the Related Art A printing plate for printing an image recorded on an original film (hereinafter referred to as "negative film") such as a negative film on a photosensitive lithographic printing plate (hereinafter referred to as "printing plate") used for printing plate printing or the like. In a material printing device, a printing plate is positioned on a printing platen located at a position facing a light source, a negative film is positioned and positioned on the printing plate, and recorded on the negative film by contact exposure. Prints the printed image on a printing plate.

In such a printing plate printing apparatus, a negative film is attached to a film auxiliary metal fitting of a predetermined shape, and the film auxiliary metal fitting is positioned with respect to the printing platen. There is a printer that is positioned with respect to a printing plate that is positioned and mounted on a printing plate. As such a film auxiliary metal fitting, there is a thin metal strip-shaped plate material in which a plurality of through holes are formed, and an adhesive tape is attached so as to cover the through holes (hereinafter, referred to as “negative bar”). When attaching the negative film to the negative bar, the negative film is placed with the through-hole facing the negative film, and the adhesive tape is attached to the negative film in the through-hole by pushing the adhesive tape into the through-hole.

In a plate printing apparatus, when a negative film is held on a surface plate, negative pressure is supplied to suction grooves (suction grooves) formed on the upper surface of the surface plate. For example, on a surface plate where a negative film is attached to a negative bar, air between the surface plate and the negative film is sucked by supplying negative pressure to suction grooves formed corresponding to the positioned negative film. The negative film is held in close contact with the platen by so-called vacuuming.

After the negative film is attached to the negative film, when the negative film is taken out from the surface plate together with the negative bar, the supply of the negative pressure to the suction groove is released. Thus, if the peripheral edge of the negative film is lifted, air enters between the negative film and the surface plate, and the close contact of the negative film is released.

However, in the through-hole of the negative bar in which the adhesive tape is stuck to the negative film, the vacuum between the surface of the negative film and the surface of the platen is substantially vacuum because the negative film is pulled by the adhesive tape. . In addition, the negative film attached to the adhesive tape,
It is easy to dent at the through hole. Therefore, when the negative bar is lifted, the depression of the negative film may act as a suction cup and may not be lifted.

For this reason, when trying to lift the negative film together with the negative bar, there is a problem that the negative film remains stuck on the surface plate at the through-hole portion, and the adhesive tape is peeled off from the negative film.

Further, if the supply of the negative pressure to the suction groove is simply released, air may not reliably enter the space between the film and the surface plate, so that the negative film can be smoothly removed from the surface plate. It can be difficult.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and prevents the original film from being peeled off from the film auxiliary metal fitting when the original film is taken out from the surface plate, so that the original film can be smoothly removed. It is an object of the present invention to propose a printing plate printing apparatus which can take out an original film from a surface plate quickly and reliably.

[0010]

The invention according to claim 1 is
An adhesive tape is attached so as to cover a plurality of through holes formed in the film auxiliary fitting from one surface, and the original film is opposed to the surface opposite to the surface to which the adhesive tape is attached, and the adhesive The original film is adhered to the auxiliary film fitting by pressing the tape into the through-hole, and the original film is transported and positioned together with the auxiliary film fitting, and the image recorded on the original film is transferred. A printing plate printing apparatus for printing on a printing plate,
The film auxiliary metal fittings are placed together with the original film, and the film auxiliary metal fittings are formed on a surface plate that sucks and holds the original film by negative pressure supplied to a suction groove formed on the surface. And an introduction means for introducing air between the original film facing the through hole and the upper surface of the platen.

According to the present invention, an introduction means for introducing air between the original film and the upper surface of the surface plate is provided on the surface plate on which the auxiliary film fitting to which the original film is pasted is placed together with the original film. ing. By introducing air between the original film and the surface plate, it is possible to prevent the original film from sticking to the surface plate.

[0012] With this, when the film auxiliary metal fitting on which the original film is pasted together with the original film is lifted and taken out from the surface plate, the original film adheres to the surface plate near the through hole of the film auxiliary metal fitting. Thus, it is possible to reliably prevent the adhesive tape from peeling off. When the original film is peeled off from the film auxiliary fitting, processing defects such as defective transport of the original film and defective positioning occur, but such processing defects can be prevented.

According to a second aspect of the present invention, the introduction means includes:
The suction groove formed in the surface plate extends at least to a peripheral position of a through hole of each of the film auxiliary fittings positioned on the surface plate.

According to the present invention, the suction groove for sucking the original film is extended to the vicinity of the through hole of the auxiliary film fitting. Thus, when the original film is taken out from the surface plate, if air enters the suction groove, it is possible to ensure that the air enters into the vicinity of the through hole to which the film auxiliary fitting is attached. Further, when the original film is attached to the auxiliary film fitting, the original film corresponding to the vicinity of the through hole attached to the auxiliary film fitting can be securely held.

According to a third aspect of the present invention, the introduction means includes:
An air hole is formed in the surface plate so as to face each through hole of the film auxiliary fitting positioned on the surface plate.

According to the present invention, the air hole is provided at a position corresponding to the through hole. Thus, it is possible to reliably prevent the original film from being in close contact with the surface plate near the through hole.

According to a fourth aspect of the present invention, the introduction means includes:
An air blowing nozzle is provided near each through-hole of the film auxiliary fitting positioned on the surface plate.

According to the present invention, the air blowing nozzle for feeding air between the original film and the surface plate is provided on the surface plate facing the through hole of the auxiliary film fitting. This allows the original film to be reliably separated from the platen if air is sent between the original film and the platen by the air blowing nozzle when lifting the film auxiliary bracket. Peeling from the auxiliary fitting can be reliably prevented.

According to a fifth aspect of the present invention, there is provided a plate printing apparatus for printing an image recorded on an original film onto the printing plate by bringing the original film into close contact with the printing plate, wherein the mounted original is An air blowing nozzle is provided on a surface of the surface plate on which the original film is in close contact with a surface plate that holds the film by suction grooves formed on the surface thereof.

According to the present invention, an air blowing nozzle for sending air between the original film and the surface plate is provided on the surface plate on which the original film is placed and held by suction. When removing the original film from the surface plate, the original film may remain in close contact with the surface plate just by releasing the negative pressure supplied to the suction groove.However, air is blown out from the air blowing nozzle to By allowing air to enter between the surface plates, the original film can be reliably lifted off the surface plate, and the original film can be smoothly removed from the surface plate.

Such an air blowing nozzle is a position where the original film is placed at a position deviated from the peripheral edge of the printing plate, and blows air from this position toward between the original film and the printing plate. Is more preferable. Thus, the original film that is in close contact with the printing plate can be easily peeled off from the printing plate.

[0022]

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

The plate printing apparatus 10 has a film loading section 12 provided at the center of the front of a machine frame (not shown).
An original film (for example, a negative film, hereinafter referred to as “negative film N”) is loaded on a tray (not shown).
In the negative film N, a register mark is recorded as a marker indicating an image area or a punch hole is formed at a predetermined position of a peripheral portion which is a non-image area. Negative film N
Are temporarily positioned and loaded on the tray based on the punch hole when the punch hole is formed and based on the outer periphery when the register mark is recorded.

The plate printing apparatus 10 includes a film loading unit 1
2, a negative film N is sent from the film loading unit 12 to the bonding unit 14, and positioned in the bonding unit 14 based on a positioning index such as a punch hole or a register mark. After that, it is attached to a negative bar 16 used as an auxiliary metal fitting for positioning. The negative film N affixed to the negative bar 16 is sent to the printing unit 20 via the standby unit 18.

On the other hand, the printing plate P is loaded into the printing plate loading section 24 in a state of being stacked on the printing plate mounting table (skid) 22, taken out from the uppermost layer, sent to the printing section 20, and sent to the printing section 20. It is placed and positioned on a printing platen 20A provided therein.

On the printing plate P positioned on the printing platen 20A, the negative film N conveyed together with the negative bar 16 from the standby unit 18 to the printing unit 20 is positioned and placed on the basis of the negative bar 16. You. By irradiating light from a light source (not shown) in this state, the negative film N
Is printed on the printing plate P. When the printing plate P on which the image has been printed is taken out from the printing unit 20, it is sent to the temporary stacking unit 42.

In the printing plate printing apparatus 10, the negative film N whose image printing on the printing plate P has been completed is returned from the printing section 20 to the standby section 18, and is transported from the standby section 18 to above the bonding section 14, where Above 14, it is stored in a tray (not shown) for discharge. The negative film N is peeled off from the negative bar 16 during the transportation.

The printing plate printing apparatus 10 applied to this embodiment is capable of printing images of one page of a newspaper in a vertical direction.
An L1W size printing plate P1 (indicated by a solid line in FIG. 1) and an image for one page of a newspaper are arranged vertically and horizontally and printed or spread on a newspaper 1
Processing of a printing plate P2 of 2L2W size (indicated by a two-dot chain line in FIG. 1), which can print images of pages vertically, can be performed. On the printing plates P1 and P2, images are printed on the top side and the ground side, respectively, such that the longitudinal direction is the top and bottom direction of the image recorded on the negative film N. The printing plate P is mainly conveyed along the width direction. Hereinafter, the direction of the printing plate P in the longitudinal direction (vertical direction) is indicated by an arrow L direction, and the direction of the printing plate P in the width direction is indicated by an arrow W direction.

In the plate printing apparatus 10, a negative film N on which an image of one newspaper page is recorded, or a negative film N on which an image of one page spread (two newspaper pages) is recorded is used. You. Negative film N on a transparent negative sheet
May be attached in advance.

The plate printing apparatus 10 uses one negative film N when printing an image on the printing plate P1, but uses the two negative films N in the width direction when printing an image on the printing plate P2. The images are printed at the same time while being aligned and positioned on the printing plate P2. In the following,
A negative film N on which an image for one page of a newspaper is recorded will be described as an example.

On the other hand, FIGS. 3A and 3B show a negative bar 16 used in the printing plate printing apparatus 10.
FIG. 3A shows a negative bar 16B used for printing an image on the printing plate P2, and FIG. 3B shows a negative bar 16A used for printing an image on the printing plate P1. The basic structure of the negative bars 16A and 16B is as follows.
The description is mainly given below using the negative bar 16B.

The negative bar 16 is formed by a thin strip-shaped negative bar main body 36. The negative bar main body 36 has a plurality of long holes 38 at one end side in the width direction along the longitudinal direction.
Are drilled. The long hole 38 faces the non-image portion on the ground side of the negative film N when attaching the negative film N to the negative bar 16. Therefore, as shown in FIG. 3 (B), the long hole 38 of the negative bar 16A to which one negative film N is attached
Is formed so as to be deviated toward one end in the longitudinal direction.

An adhesive tape 40 is attached to the negative bar main body 36 so as to cover the long hole 38 on the surface opposite to the surface facing the negative film N. Thus, the adhesive tape 40 is pressed so as to be pushed into the long hole 38 with the long hole 38 facing the predetermined position of the negative film N and the negative bar main body 36 placed on the negative film N. 40 adheres to the negative film N in the long hole 38.

As shown in FIGS. 3A and 3B, an adhesive tape 40 is provided on the negative bar main body 36 at the other end in the width direction, that is, at the end opposite to the elongated hole 38. The reinforcing plate 44 is joined to the surface to which it is adhered. The reinforcing plate 44 has a large thickness (for example, a thickness of about 3.0 mm), and the negative plate 16 can be securely held by attracting the reinforcing plate 44 with a suction cup or a magnet.

The reinforcing plate 44 of the negative bar 16B is divided and joined so as not to cover the end of the printing plate P2 in the width direction when the negative bar 16B is positioned with respect to the printing plate P2. The reinforcing plate 44 is divided and joined so that when the negative bar 16A is positioned with respect to the printing plate P1, it does not cover the widthwise end of the printing plate P1.

As shown in FIGS. 3A and 3B, a pair of pin holes 52 and 54 for positioning at both ends in the longitudinal direction are formed in the negative bar 16 in pairs. A pair of pin holes 56 and 58 are provided for determining a temporary position when the negative bar 16 is loaded and placed in a temporary placement section (not shown). The negative bar 16A has a negative bar 16B.
A long hole 60 is formed at a predetermined position at one end in the longitudinal direction of the negative bar main body 36 in order to identify the negative hole. By detecting the presence or absence of the long hole 60 by a sensor (not shown), it is possible to identify the negative bar 16A and the negative bar 16B, that is, whether the negative bar 16A is for the printing plate P1 or the negative bar 16B for the printing plate P2. It has become.

As shown in FIG. 2, the sticking section 14 is provided with a sticking stage 26, and the negative film N is transported from the film loading section 12 and placed on the sticking stage 26.

The attaching stage 26 has a fixed surface plate 28 large enough to place two negative films N side by side. When printing an image on the printing plate P2, two negative films N are placed side by side on the fixed platen 28,
When printing an image on the printing plate P1, the negative film N is placed only on one side of the fixed platen 28 (left side in FIG. 2).

An opening is formed in the fixed platen 28 at the center of the area where the negative film N is placed, and the movable platen 30 is disposed in the opening. The moving platen 30 forms an XY-θ table by a drive mechanism (not shown), and is movable in the vertical direction of the negative film N, in a direction orthogonal to the vertical direction, and in a rotating direction.

On the upper surface of the moving platen 30, suction grooves 32 are provided.
When the negative pressure is supplied to the suction groove 32 while the negative film N is placed, the negative film N is sucked and held on the moving platen 30, and the bonding table 26 (fixed platen) 28), the relative movement of the negative film N is possible.

In the attaching section 14, for example, when a negative film N on which a register mark is recorded as an index of positioning is conveyed from the film loading section 12 and placed on the attaching stage 26, the negative film N is recorded on the negative film N. The position of the register mark is read by a sensor (not shown), and based on the read result, the movable platen 30 holding the negative film N by suction is moved. Further, in the case of a negative film in which a punch hole is formed as an index for positioning, a positioning pin (not shown) provided based on the position of the punch hole is projected from the fixed surface plate 28, and each positioning pin is The film is inserted into a punch hole formed in the film N. The positioning of the negative film N using the register marks or punch holes formed in the negative film N can be performed by a conventionally known method, and a detailed description thereof will be omitted in the present embodiment.

A suction groove 34 is formed in the fixed surface plate 28 around an opening where the movable surface plate 30 is arranged. The negative film N is supplied to the negative film N by a negative pressure supplied to the suction groove 34. It is sucked and held on the fixed surface plate 28.

The attaching section 14 is provided with a negative bar supporting section 62 adjacent to the attaching stage 26. The negative bar support portion 62 is disposed on the ground side in the vertical direction of the negative film N on which the long support plate 64 is placed on the attaching stage 26, and the longitudinal direction is arranged along the width direction of the negative film N. The support plate 64 is connected to a rod 66A of the air cylinder 66 on a lower surface (the back side of the paper surface in FIG. 2) and is connected to one end of a pair of guide shafts 68 to be supported. Thus, the support plate 64 is raised and lowered in parallel by the operation of the air cylinder 66.

On the other hand, positioning pins 70 and 72 are disposed at both ends in the longitudinal direction of the support plate 64 so as to be able to protrude and disappear from the pin holes 52 and 54 of the negative bar 16. Also,
The support plate 64 has a plurality of magnets 74 embedded at predetermined intervals between the positioning pins 70 and 72.

The negative bar support portion 62 is driven by an air cylinder 66 while energizing a magnet 74 to support the support plate 6.
4 is moved upward, and the positioning pins 70 and 72 are made to protrude.
Receive 6. At this time, the pin hole 52 of the negative bar 16
When the positioning pins 70 and 72 are inserted into the position 54, the positioning pins 70 and 72 are positioned with respect to the attaching stage 26 and placed on the support plate 64. The magnet 74 is a negative bar 16
The negative bar 16 is held on the support plate 64 by the attraction of the reinforcing plate 44 by the magnetic force of the magnet 74.

The support plate 64 holding the negative bar 16 descends while holding the negative bar 16 in a substantially horizontal state by the air cylinder 66 contracting the rod 66A.
6 is placed on the negative film N.

The sticking section 14 is provided with a sticking device 76 for sticking the negative film N to the negative bar 16. The attaching device 76 includes a pressing roller 78.
The pressing roller 78 is a crown roller whose outer peripheral portion is formed of an elastic body such as rubber and whose central portion in the width direction has a large diameter. When the negative bar 16 is placed on the negative film N, the attaching device 76 moves the pressing roller 78 over the adhesive tape 40 attached to the negative bar main body 36 by the driving force of a driving unit (not shown) along the longitudinal direction of the negative bar main body 36. To move. At this time,
Since the pressing roller 78 is urged downward, the adhesive tape 4 covering the long hole 38 of the negative bar 16
0 is pushed into the long hole 38 and adheres to the negative film N in the long hole 38. Thereby, the negative film N is adhered to the negative bar 16 via the adhesive tape 40.

The sticking section 14 is provided with a small table 80 adjacent to the sticking stage 26. When the pressing roller 78 returns to the small table 80, the shaft 84 moves to the small table 80. By being bridged between the substantially mountain-shaped guides 82 provided in pairs, the guides are held in a floating state and are prevented from being deformed.

A suction groove 46 is formed in the fixed surface plate 28 so as to face the ground-side end of the negative film N. The suction groove 46 extends along the width direction of the negative film N, and the negative side of the negative film N is suction-held by supplying a negative pressure together with the suction groove 34.

The suction groove 46 has a plurality of extending grooves 48 extending between the long holes 38 of the negative bar 16 positioned and mounted on the negative film N. The extension grooves 50 formed in a character shape are connected. Thus, when a negative pressure is supplied to the suction groove 46, the negative bar 16
The periphery of the long hole 38 is securely held on the fixed platen 28 by suction.

Further, as shown in FIG.
8 and 50 reach the vicinity of the long hole 38 formed in the negative bar 16, so that the suction groove 46 and the extension groove 48,
Air is supplied between the negative film N around each of the long holes 38 and the fixed platen 28 via 50. Thus, when the supply of the negative pressure is released and the negative film N is lifted by the film carrier (not shown), the close contact of the negative film N around the long hole 38 is easily released.

In the plate printing apparatus 10, the attaching stage 2
When the negative film N is attached to the negative bar 16 on 6,
The negative film N and the negative bar 16 are held together and transported to the standby unit 18, and are transported from the standby unit 18 onto the printing platen 20 </ b> A of the printing unit 20.

As shown in FIGS. 5 to 7, the standby unit 1
8, a set / reset table 100 is provided.
The set / reset table 100 is vertically arranged in pairs, and is driven by the drive unit 102 from the standby unit 18 to the printing unit 20.
It is designed to move horizontally alternately. The negative film N and the negative bar 16 are placed on the set / reset table 100 and transported between the standby unit 18 and the printing unit 20.

The driving device 102 includes a pair of guide rods 10 arranged on both sides along the width direction of the negative film N.
4 is provided. The guide rod 104 is vertically moved by two corresponding to each of the two set / reset tables 100.
The books are arranged one by one and attached to the bracket 106. Each guide rod 104 has a slider 1
08 is movably inserted along the axial direction. The slider 108 has a bracket 110 having a substantially L-shape.
Is attached.

Brackets 110 provided on sliders 108 facing up and down are mounted such that the tips are parallel at positions close to each other, and the tips are attached to the other bracket along the width direction of the negative film N. Pointed to 110.

The two rodless cylinders 11 are provided at one end of the standby film 18 along the width direction of the negative film N.
2 are arranged in parallel with the guide rod 104 and are attached via a bracket 114. The rodless cylinders 112 are arranged vertically above and below the guide rod 104 corresponding to each of the two set / reset tables 100.

The drive block 112 A of each rodless cylinder 112 has a substantially rectangular plate 116.
Is attached. A rectangular notch 118 is formed in the plate 116 at the tip end facing the adjacent slider 108, and the adjacent slider 108 enters into each notch 118.

As a result, when the rodless cylinder 112 operates and the drive block 112A moves in the axial direction, the slider 108 provided on the guide rod 104 adjacent to the rodless cylinder 112 follows the drive block 112A. Move together with the bracket 110.

A set / reset table 100 is provided between brackets 110 facing each other along the width direction of the negative film N.
Is attached to it. As a result, the drive of the rodless cylinder 112 causes the set / reset table 100 to move horizontally toward the printing unit 20.

As shown in FIG. 5 and FIG.
In the reset table 100, a base plate 120 on which the negative bar 16 is placed is disposed on the ground side along the vertical direction of the negative film N, and the base plate 120 is mounted on the bracket 110.
It is attached by being hung between. On the top side of the base plate 120, a plate 122 having a rectangular planar shape on which the negative film N is placed is arranged. The plate 122 is attached to the base plate 120 by connecting the other ends of the plurality of connection bars 123 whose one ends in the longitudinal direction are connected to the base plate 120 to the lower surface.

Plate 122 on which negative film N is placed
Is formed with a rectangular cutout opening, which prevents the negative film N placed on the plate 122 from sticking.

On the other hand, the negative plate 16 is
Pins 124 and 126 are protruded at positions corresponding to the pin holes 56 and 58 formed in. Negative bar 16
The pins 124 and 126 are inserted into the pin holes 56 and 58, respectively, and are positioned and mounted on the base plate 120. In addition, as shown in FIG.
Are formed with through holes 128, 130 corresponding to the pin holes 52, 54 of the negative bar 16. With this configuration, the pin holes 52, 52 of the negative bar 16 are placed in a state where the negative bar 16 is placed on the base plate 120. , 54 can be inserted with positioning pins.

The base plate 120 has a long hole 3 formed in the negative bar 16 (16B) placed and positioned.
Air holes 132 are formed at positions facing each of the holes 8. As a result, when the negative bar 16 to which the negative film N is attached is taken out from the base plate 120, the negative film N, which is likely to be depressed in the long hole 38, is attracted to the base plate 120. Has been prevented.

As shown in FIGS. 5 to 7, brackets 134 are provided on the plate 122 at both ends along the width direction of the negative film N at the end opposite to the base plate 120.
The roller 136 is attached via the. As shown in FIGS. 6 and 7, the set / reset table 100 is horizontally held by the rollers 136 riding on guides 139 mounted at predetermined positions of a frame (not shown) via brackets 138. You.

On the other hand, as shown in FIG.
At 0A, a positioning pin 86 is disposed at a predetermined position on one end side of the printing plate P along the vertical direction so as to be able to protrude and retract,
At one end in the width direction of the printing plate P, a pair of positioning pins 88 are provided so as to be able to protrude and retract along the top and bottom directions of the printing plate P.

A long hole 90 is formed in the printing platen 20A on the top side in the vertical direction so as to face the positioning pin 86.
Positioning pins 8 are provided at the other end and the center in the width direction.
8, long holes 92 and 94 facing each other are provided in pairs. A pusher pin (not shown) that moves toward the positioning pin 86 or the positioning pin 88 projects from each of the long holes 90, 92, and 94.

In the printing plate printing apparatus 10, when the printing plate P is mounted on the printing platen 20A, the positioning pins 86 and 88 are protruded, and the elongated holes 90 and the elongated holes 90 are formed in accordance with the size of the mounted printing plate P. The printing plate P is pressed toward the positioning pins 86 and 88 by a pusher pin protruding from the hole 92 or the long hole 94. As a result, the printing plate P is moved to the positioning pins 8.
6 and 88, the printing plate P is attached to the printing platen 2
Positioned with respect to 0A. In addition, a suction groove (not shown) is formed on the printing platen 20A so as to face the positioned printing plate P, and the printing plate P is suction-held by negative pressure supplied to the suction groove.

Printing plate P positioned on printing platen 20A
On the top, a negative bar 1 by a set / reset table 100
The negative film N is transported from the standby unit 18 together with the negative film 6 and placed thereon. In the printing unit 20, a negative frame (not shown) is disposed above the printing platen 20A, and the negative film N and the negative bar 16 mounted on the set / reset table 100 are arranged.
Is taken out of the set / reset table 100 by the negative frame and placed on the printing plate P of the printing platen 20A. At this time, the positioning pins provided in the negative frame are inserted into the pin holes 52 and 54 of the negative bar 16, whereby the negative film N and the negative film N are positioned with respect to the printing platen 20A.

Further, a transparent cover sheet 96 is attached to the negative frame, and the negative film N placed on the printing plate P is covered with the cover sheet 96.

The printing platen 20A is provided with a suction groove 98 so as to surround the printing plate P which is positioned. The suction groove 98 is covered with the negative film N protruding from the peripheral edge of the printing plate P or the cover sheet 96 protruding from the peripheral edge of the negative film N. Negative film N and cover sheet 96
Is sucked and held on the printing platen 20A by the negative pressure supplied to the suction groove 98.

In the printing section 20, when the negative film N and the cover sheet 96 are sucked and held, they are inserted between the negative film N and the printing plate P and between the negative film N and the cover sheet 96 by squeezing means (not shown). The air is squeezed out, so that the printing plate P, the negative film N, and the cover sheet can be held in close contact with each other.

The suction groove 98 is extended at a plurality of locations so that the tip thereof extends below the peripheral portion of the printing plate P, so that when the negative film N is suctioned, the printing plate P
A negative pressure is supplied along the end face of the printing plate P to bring the negative film N into close contact with the printing plate P. The suction groove 98 can be formed in any shape as long as the negative film N and the cover sheet 96 can be closely adhered to the printing platen 20A.

The printing platen 20A is provided with a plurality of nozzles 140. As shown in FIG.
The baking platen 20A has holes 142 at a plurality of locations from the back side.
And a pipe 144 connected to air supply means (not shown) is connected in the hole 142. Into the hole 142, a fine hole 146 formed obliquely from the upper surface side of the printing platen 20A reaches.
Is blown obliquely onto the printing platen 20A through the fine holes 146. That is, the opening of the fine holes 146 on the printing platen 20A serves as the nozzle 140.

As shown in FIG. 8, the nozzle 140
A plurality of printing plates P are formed along the periphery of the printing plate P positioned on the printing platen 20A. When the image recorded on the negative film N is printed on the ground side of the printing plate P placed on the printing platen 20A, the negative bar 16 is moved to the printing platen 20A.
It is located above. On the baking surface plate 20A,
At this time, the nozzle 140 is formed at a position corresponding to the long hole 38 of the negative bar 16. Thus, after the image recorded on the negative film N is printed on the ground side of the printing plate P, when the negative bar 16 is lifted together with the negative film N, the negative bar 16 is placed by ejecting air from the nozzle 140. Air can be sent between the negative film N and the printing platen 20A.

The operation of the present embodiment will be described below.

In the printing plate printing apparatus 10, the printing plate loading unit 24
When the printing plate P is loaded into the film loading unit 12 and the negative film N is loaded into the film loading unit 12 and the start of the printing process is instructed, the printing plate P is taken out from the printing plate loading unit 24 and the printing unit 20 is printed. It is supplied onto the surface plate 20A. With this,
In the printing plate printing apparatus 10, the negative film N loaded in the film loading section 12 is taken out and transported to the sticking section 14.

When the negative film N conveyed from the film loading unit 12 is placed on the attaching stage 26, the sticking unit 14 positions the negative film N, and then moves the suction groove 34 of the fixed platen 28, 46 and moving platen 30
The negative film N is sucked and held by the negative pressure supplied to the suction groove 32. At this time, since the extension grooves 48 and 50 are formed in the suction groove 46 at positions corresponding to the negative bar 16, the next position where the negative bar 16 is placed on the negative film N is reliably sucked to the fixed surface plate 28. You.

When the positioning of the attaching stage 26 of the negative film N is completed, the negative bar 16 conveyed by the negative bar carrier (not shown) is received by the support plate 64 and placed on a predetermined position of the negative film N. Thereafter, by moving the pressing roller 78 onto the adhesive tape 40 of the negative bar 16, the adhesive tape 40 is pushed into the long hole 38 and attached to the negative film N, and the negative bar 16 is taken out from the attaching section 14 together with the negative film N. .

At this time, in the sticking section 14, the suction grooves 32 of the movable surface plate 30 and the suction grooves 34, 46 of the fixed surface plate 28 are formed.
The negative pressure is released, the negative bar 16 is attracted by the negative bar carrier, and the negative film N is attracted and lifted by the film carrier (not shown) moving integrally with the negative bar carrier.

When the negative film N is lifted at the center, air enters from the suction groove 46 into the extension grooves 48 and 50. Since the extension grooves 48 and 50 reach the periphery of the long hole 38 of the negative bar 16, air enters between the negative film N facing the long hole 38 and the fixed platen 28.

As a result, the negative film N
The portion which is easily depressed by the adhesive tape 40 adhered thereto is lifted together with the negative bar 16 without adsorbing to the fixed platen 28. Further, since the negative film N does not adhere to the fixed platen 28 in the long hole 38, the negative film N does not peel off from the adhesive tape 40, and the negative film N is lifted while being attached to the negative bar 16. .

That is, as shown in FIG. 4, when the adhesive tape 40 is pushed into the long hole 38 by the pressing roller 78 and the negative film N is stuck, the pressing roller 7
When 8 returns, the adhesive tape 40 tries to lift the negative film N in the long hole 38. Thus, the negative film N is easily depressed at a position facing the long hole 38. Therefore, when the negative film N is lifted as it is,
The dents formed in the negative film N serve as suction cups, and the negative film N sticks to the fixed platen 28. For this,
The negative film N comes off from the adhesive tape 40.

On the other hand, when air enters through the suction groove 46 into the extension grooves 48 and 50 formed so as to reach the vicinity of the long hole 38, this air is released.
, Between the negative film N and the upper surface of the fixed surface plate 28 to release the adhesion of the negative film N to the fixed surface plate 28. Therefore, the negative film N is
Can be lifted from the fixed surface plate 28 together with the negative bar 16 without being partially adhered to the base plate.

The negative film N taken out from the attaching section 14 is transported to the standby section 18 where the negative film N is set /
It is positioned and mounted on the reset table 100. The set / reset table 100 on which the negative film N and the negative bar 16 are placed is conveyed onto the printing platen 20A of the printing unit 20 by driving the rodless cylinder 112, and is taken out by a negative frame (not shown). It is placed on the printing plate P positioned on 20A.

The negative bar 16 is the set / reset table 10
0, a pin 124 attached to the base plate 120,
126 is positioned and mounted by being inserted into the pin holes 52 and 54. An air hole 132 is formed in the base plate 120 so as to face the long hole 38 of the negative bar 16. When the negative bar 16 to which the negative film N is attached is taken out from the set / reset table 100,
Air enters through the air holes 132. As a result, when the negative bar 16 is taken out, the negative film N is applied to the base plate 12 at the slot 38 where the adhesive tape 40 is attached.
The negative film N does not stick to the base plate 120 without sticking to the negative plate N.
6 does not come off.

The negative film N placed on the printing plate P
Is positioned on the printing plate P by positioning the negative bar 16 on a negative frame (not shown). In the printing unit 20, the negative film N is brought into close contact with the printing plate P to be sucked and held by squeezing by a squeeze means (not shown) while supplying a negative pressure to the suction groove 98 formed on the printing platen 20A. The image recorded on the negative film N is printed on the printing plate P.

In the printing unit 20, each time the printing process of the image recorded on the negative film N onto the printing plate P is completed, the negative film N is transferred to the printing platen 20 by a negative frame (not shown).
A Lift from above. At this time, in the printing unit 20, the supply of the negative pressure to the suction groove 98 of the printing surface plate 20 </ b> A is stopped, and the air is blown out from the nozzle 140. This nozzle 140
Is provided so as to face the peripheral edge of the printing plate P, whereby air is supplied not only between the printing platen 20A and the negative film N but also between the printing plate P and the negative film N.
The negative film N is smoothly peeled off from the printing plate P.

Further, the negative plate 16 is attached to the printing platen 20A.
The nozzle 140 is provided at a position facing the long hole 38 of the negative bar 16 when is mounted. This allows
Since air is reliably supplied also between the negative film N where the negative bar 16 is attached and the printing platen 20A, the portion where the negative film N is sandwiched between the negative bar 16 and the printing platen 20A. However, it does not adhere to the printing platen 20A. Therefore, even when the negative film N is lifted from the printing platen 20A, the negative film N does not peel off from the negative bar 16.

As described above, in the printing plate printing apparatus 10 applied to the present embodiment, the negative film N is fixed to the fixed platen 28 when the negative film is pasted on the negative bar 16 and transported and positioned. Set / reset table 100,
It is possible to reliably prevent the negative film N from peeling off from the negative bar 16 when the negative film N is taken out from the surface plate such as the printing surface plate 20A. Therefore, it is possible to reliably prevent processing defects such as a transport failure and a positioning failure of the negative film N due to the peeling of the negative film N from the negative bar 16, and perform smooth image printing on the printing plate P using the negative film N. be able to.

The above-described embodiment does not limit the configuration of the present invention. The present invention can be used for a plate printing apparatus having an arbitrary configuration in which the negative film N is attached to the negative bar 16 and the negative film N is used to position the negative film N. In the present embodiment, the negative film N has been described as the original film. However, the negative bar 16 to which the present invention is applied is not limited to the negative film, and can be used for processing an original film such as a positive film.

Further, the negative bar 1 applied to the present embodiment
No. 6 does not limit the shape and the like of the film auxiliary fitting used in the plate printing apparatus to which the present invention is applied.

[0092]

As described above, according to the present invention, by introducing air between the original film and the surface plate at a position facing the through hole of the auxiliary film fitting, the auxiliary film fitting together with the original film is provided. When the document is lifted, it is possible to reliably prevent the original film from coming into close contact with the platen. As a result, when the auxiliary film fitting is lifted, the original film can be reliably prevented from peeling off, and an excellent effect that the original film can be smoothly transported and positioned can be obtained. Further, in the present invention, the original film and the surface plate can be reliably separated when the original film is taken out by providing the air blowing nozzle on the surface plate that sucks and holds the original film.

[Brief description of the drawings]

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

FIG. 2 is a schematic plan view showing an attaching stage provided as a surface plate on which a negative film is placed on an attaching section.

FIG. 3A is a schematic perspective view showing a negative bar for a printing plate P2, and FIG. 3B is a schematic perspective view showing a negative bar for a printing plate P2.

FIG. 4 is a schematic sectional view showing the vicinity of a long hole of a negative bar when a negative film and a negative bar are placed on a fixed surface plate of an attaching stage.

FIG. 5 is a schematic plan view showing a set / reset table provided as a surface plate for mounting a negative film on a standby unit.

FIG. 6 is a schematic perspective view showing a set / reset table and a driving device.

FIG. 7 is a schematic side view showing movement of a set / reset table.

FIG. 8 is a schematic plan view showing a printing surface plate provided as a surface plate for mounting a negative film on a printing portion.

FIG. 9 is a schematic sectional view of a printing platen showing the vicinity of a nozzle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Plate printing apparatus 14 Pasting part 16 Negative bar (Auxiliary metal fittings) 18 Stand-by part 20 Printing part 20A Printing platen (platen) 26 Pasting stage 28 Fixed platen (platen) 32, 34, 46 Suction groove 38 Length Hole (through hole) 40 Adhesive tape 48, 50 Extension groove (introduction means) 76 Adhering device 78 Press roller 98 Suction groove 100 Set / reset table (surface plate) 120 Base plate (surface plate) 132 Air hole (introduction device) 140 Nozzle (introduction means) N Negative film (original film) P Printing plate

Claims (5)

[Claims] 1. An adhesive tape is attached so as to cover a plurality of through holes formed in a film auxiliary metal fitting from one surface,
The original film is adhered to the auxiliary film fitting by pressing the adhesive tape so that the original film is opposed to the surface opposite to the surface on which the adhesive tape is attached, and pressing the adhesive tape into the through hole. A plate material printing apparatus for transporting and positioning an original film together with the film auxiliary fitting, and printing an image recorded on the original film onto a printing plate, wherein the film auxiliary fitting is placed together with the original film. The original film and the surface plate facing the through-hole formed in the film auxiliary metal fitting are placed on the surface plate that sucks and holds the original film by the negative pressure supplied to the suction groove formed on the surface. A plate printing apparatus, comprising: an introducing means for introducing air between upper surfaces. 2. The method according to claim 1, wherein the introduction means extends at least a suction groove formed in the surface plate to a peripheral position of a through hole of each of the film auxiliary metal fittings positioned on the surface plate. 2. The printing plate printing apparatus according to claim 1, wherein: 3. The apparatus according to claim 2, wherein the introduction means is an air hole formed in the surface plate so as to face each through hole of the film auxiliary fitting positioned on the surface plate. Item 2. A plate printing apparatus according to Item 1. 4. The air introducing nozzle according to claim 1, wherein said introducing means is an air blowing nozzle provided in the vicinity of each through hole of said auxiliary film fitting positioned on said surface plate. Plate printing equipment. 5. A plate material printing apparatus for bringing an original film into close contact with a printing plate and printing an image recorded on the original film onto the printing plate, wherein the mounted original film is formed on the surface. A plate printing apparatus, characterized in that an air blowing nozzle is provided on a surface of the platen that is held by suction by a suction groove, on a surface of the platen where the original film is in close contact.