JPH027054A - Device for automatically developing photosensitive planographic printing plate - Google Patents

Abstract

PURPOSE:To attain efficient automatic development with the title device by introducing an imagewise exposed photosensitive planographic printing plate downward into the developing vessel at an angle of <=20 deg. to a horizontal plane by a pair of transfer rollers, developing the plate during transfer in a developing soln. and carrying out a stage such as washing or desensitizing stage. CONSTITUTION:A photosensitive planographic printing plate 12 is introduced downward into the developing vessel 14 of the title device 10 at an angle of <=20 deg. to a horizontal plane by a pair of transfer rollers 22. The top of the vessel 14 is opened, the central part of the bottom is recessed and plural guide rollers 24-46 of the same diameter are arranged along the bottom to form a path for transferring the plate 12. The plate 12 is transferred in the vessel 14 so that the radius of curvature is regulated to 200-900mm when the plate 12 becomes the max. curvature in a developing soln. in the vessel 14. During the transfer, the plate 12 is developed by spraying the developing soln. from transfer rollers 48 as guide rollers acting as spray nozzles. The developing soln. on the plate 12 is recovered in a recovering vessel 16. The plate 12 is then introduced into a washing vessel 18 and washed.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is directed to transporting a nine-photosensitive lithographic printing plate with printed printing plates along a conveyance path, and then transferring it to a positive type, a negative type, or a positive/negative type. At least one next process treatment such as water washing treatment, rinsing treatment, or desensitization treatment following development treatment 11? Row 5 relates to a photosensitive lithographic printing plate automatic developing machine.

[Conventional technology]

The photosensitive lithographic printing plate on which the image has been printed is sent to an automatic photosensitive lithographic printing plate developing machine, which is equipped with a developing tank, a washing tank, a rinsing tank, and a desensitizing process. They are sequentially transported to tanks and the like for processing.

Such photosensitive lithographic printing plates include those in which a photosensitive material is coated on one or both surfaces of a rigid support such as an aluminum plate or a plastic plate.

A plurality of guide rollers are disposed within the developer tank, and the photosensitive planographic printing plate is immersed in the processing liquid and guided by these guide rollers.

Conventionally, a photosensitive planographic printing plate is placed just before a developer tank, and is inserted into a conveying roller 2 in a substantially horizontal direction and sent out afterward by a guide roller 7. Thereafter, the photosensitive planographic printing plate is moved downward by a guide roller and developed by a guide plate. It is transported to the bottom of the tank, raised upwards again from the bottom, and sent out from the processing tank.

[Problem to be solved by the invention]

However, when inserting a photosensitive lithographic printing plate into a developer tank, the photosensitive lithographic printing plate is molded from an aluminum plate, a plastic plate, etc. and therefore has high rigidity, so if it is transported downward with a large curvature, There is a problem in that excessive force is applied to the photosensitive planographic printing plate, causing damage to the photosensitive planographic printing plate.

Is there a transport path for photosensitive planographic printing plates when transporting them inside the developing tank? Conveying with a large curvature causes problems such as poor conveyance and damage to the plate surface of the photosensitive planographic printing plate. Furthermore, development was unstable due to insufficient development acceleration.

In consideration of the above facts, the present invention has developed a photosensitive planographic printing plate that can be smoothly transported without damaging the photosensitive planographic printing plate, and can be efficiently processed using rollers, sprays, brushes, and ultrasonic vibration devices in the processing tank. The purpose is to obtain an automatic printing plate developing machine.

〔assignment? Ninth way to solve the problem

In the present invention, the photosensitive lithographic printing plate on which the image has been printed is developed in a developing tank while being transported along a transport path, and then subjected to at least one of the following processes: washing with water, rinsing, or desensitization. The photosensitive lithographic printing plate automatic developing machine includes at least a pair of insertion rollers disposed on the insertion side of the developer tank so that the photosensitive lithographic printing plate is inserted downward at an angle of 2,000 to horizontal; The photosensitive planographic printing plate is arranged so that the photosensitive planographic printing plate is conveyed in a downwardly projecting state with a radius of curvature of 200 wm to 900 mm when the photosensitive planographic printing plate reaches a maximum curvature in a processing solution in a developing tank. At least a pair of squeeze rollers that squeeze the developer on the plate surface of the printing plate, and at least a pair of sprayers that squirt the developer toward at least one of the upper surface and the lower surface of the photosensitive lithographic printing plate downstream of the squeeze roller. a conveyance means consisting of a guide roller that also serves as a nozzle or a spray nozzle, and at least seven brushes that are arranged in at least one of the next process treatment tanks and that remove the photosensitive layer on the plate surface of the photosensitive lithographic printing plate. and/or a film removing means consisting of an ultrasonic vibrator, and the photosensitive planographic printing plate? At least a pair of conveyance rollers disposed so as to convey the image horizontally or downwardly in the horizontal direction in the processing tank for the next step are provided for image formation.

Examples of film removing means such as a brush include the following. Mechanical operations include, for example, a method of rubbing with a rubbing member. Specifically, for example, a roller-shaped rubbing member? A method of rubbing by rotating, a method of rubbing by rotating a flat plate-shaped rubbing member, a method of rubbing by moving a flat plate-shaped rubbing member back and forth and/or from side to side, or a method of rubbing with a roller. Alternatively, rubbing may be performed by rotating a planar rubbing member and moving it back and forth and/or left and right.

Note that a plurality of these rubbing members may be used in combination. Examples of these scrubbing members include brushes, sponges, and cloth.

[Effect]

Accordingly, in the present invention, the photosensitive lithographic printing plate on which the image is printed is inserted downwardly at an angle of 200 degrees from a pair of insertion rollers (therefore, it is conveyed into a developer tank and immersed in a developer solution. The lithographic printing plate is conveyed at the bottom of the developing tank by a conveying means with a radius of curvature of 200 to 000 mm, and the plate surface is squeezed by a squeeze roller.
A developer is sprayed onto the plate surface by a spray nozzle. Next, vibrations are transmitted to the printing plate by rubbing the printing plate with a brush or by using an ultrasonic imaging device to move the developer between the printing plate and the printing plate. This removes the film from the printing plate. Further, the photosensitive lithographic printing plate that rises from the developing tank is conveyed by conveyance rollers in the next step.

In this way, in the present invention, the photosensitive lithographic printing plate is transported through a smoothly curved transport path and processed efficiently. It can be done.

〔Example〕

FIG. 1 shows a photosensitive lithographic printing plate automatic developing machine I according to the present invention.
An example of O is shown.

The photosensitive lithographic printing plate automatic developing machine IO has an image printed thereon by a printing device (not shown), and a photosensitive lithographic printing plate (hereinafter referred to as "2").
(referred to as "8th edition") 12'lH developing tank /
μ, a t-th developer recovery tank 16 that collects all of the developer that overflows from the developer tank l≠, a washing tank it that washes the developer attached to the 28th plate 12, and a PS plate lλherins processing solution or A rinsing treatment tank or a desensitization treatment tank for applying a desensitization treatment liquid is provided.

As shown in FIG. 1, a pair of conveyance rollers are arranged on the side where the 28 plate 12 is inserted into the developer tank/≠. An image is printed between the pair of transport rollers 2, 2 by a printing device (not shown), and the tPS plate is inserted.

The two transport rollers are horizontally aligned with the PS plate/λ.
K so that it is sent out toward the developer tank lμ at an angle of 'K.

However, when processing a high-sensitivity PS plate lλ, etc., when it is necessary to avoid the pressure cup 5'l (t) of the KPS plate l- before the development process is completed, feed the PS plate at a horizontal or /!0 angle. Also, if you want to shorten the length of the developing tank and make it more compact, arrange the conveyance roller so that it is fed out at an angle of PS plate/2f100 to λO0.

Current gi! WI/4t is open at the top and the center of the bottom protrudes downward, forming a substantially inverted mountain shape. A developer is contained in the developer tank 14A. Guide rollers 24A and λ of the same diameter are installed along the bottom wall of the developer tank/controller.
6.2t13≠,! 4,31. Hiro O is installed. These guide rollers λμ to guide roller 4to are skewer-shaped rollers that are supported by being stretched between a pair of side plates (not shown).

A guide roller 4c2 with a larger diameter than guide roller 3 is arranged above the guide roller 2, a guide roller 4L≠ is arranged diagonally above the guide roller 3, and a guide roller 4c2 is arranged above the guide roller 2. Roller ≠ B is placed.

These guide rollers ≠λ, ≠Hiroshi, 4t6 are skewer-shaped rollers like guide rollers μ to guide rollers ≠0, and are supported by a pair of side plates (not shown).

A pair of transport rollers 4ct, which also function as squeeze rollers for squeezing the PS plate 1, are arranged between the guide roller 21 and the guide roller J4C in the center of the developing tank ≠.

The material of the conveyor roller at is silicone, neoprene, or E.
Its Vickers hardness in FT is 2O-jO degrees. The roller nip pressure of the pair of transport rollers l/Lt is l to 10k.
g/3'', and this pressure is applied by a roller nip screw coil spring applied to the bearing of the conveying roller.

The pair of conveyance rollers 4Lt, like the guide rollers 244 to 6, are rotatably supported by the side plates and are rotated by the driving force of a driving means (not shown).

Three guide rollers are arranged between the conveyance roller 4ct and the guide roller 3≠. The guide roller 32 forms a skewer-shaped roller in which a plurality of elastic rotating members are pivotally supported on the outer periphery of the roller shaft. The roller shaft of the guide roller 32 is made of a hollow pipe, and forms a spray pipe j≠ with a discharge port opened between elastic rotating members along the axial direction. That is, the guide row 232 is a small roller that also serves as a spray pipe.

Guide roller! A brush 160 is arranged above the guide roller 4L, and another brush 160 is arranged below the guide roller 4A.

A guide row 930 is arranged between the guide row 7 r and the pair of conveyance rollers 930, and is formed to have a larger diameter than the guide rollers 2 2-2. This guide roller 3Q is a skewer-shaped roller and is supported by a pair of side plates like the guide rollers 2-4t7. The axis of this guide roller 30 is guided through a bracket tot! is attached. One end of this guide j is arranged toward a pair of transport rollers at. The tip of the PS plate 12 is guided by this guide roller 3Q with a diameter of t, without deviating from the predetermined conveyance path, and the tip of the 28-plate saw is guided by the guide jλ between the pair of conveyance rollers ≠
K is designed to reliably guide you between the two.

At the bottom of the developer tank, these pair of transport rollers≠! The three guide rollers are arranged so as to convey the PS plate/2 with a radius of curvature of 300 to JJOm.

Therefore, the PS plate 1 is sandwiched and conveyed by a pair of conveying rollers and inserted into the printing tank 1≠, and the PS plate 1 is conveyed diagonally through seven passes between the guide roller 2≠ and the guide roller Hiroko, and the PS plate 1 is conveyed diagonally between the guide roller 2≠ and the guide roller Hiroko. We were guided to 21.30 and descended diagonally.
It is inserted between a pair of transport rollers by a guide j2. After passing between the pair of transport rollers + t1, the guide row 2
3-134! , J4.31% + tQ and rises diagonally, and is guided by the guide roller Hirotsu and reaches the developer collection tank 1.
It is designed to be sent out above 6. Further, the plate surface is reliably rubbed by the tightening brush 60, which is held by the guide rollers 3≠ and Hiro≠.

The brush ito is rotated by the driving force of a driving means (not shown) similarly to the pair of conveyance rollers ≠r. This is K Yoji PS2
The image is developed by being immersed in the developer in the 8th plate saw image tank l≠.

During this conveyance, the 28-plate saw is designed to be conveyed smoothly and reliably without applying excessive force.

The downstream side wall of the developer tank/Hiro 28 plate saw in the transport direction is bent toward the outside of the developer tank 1-Hiro to form a T-bent part, and the height of this bent part in the vertical direction is the same as that of the PS plate/Ko. It is lower than the side wall on the upstream side in the conveyance direction. If the developing solution in this third developing tank/tub is full and overflows, it will overflow the bent portion and be collected into the developing solution recovery tank/7.

A plurality of discharge ports are formed along the axial direction of the roller shaft of the guide roller 32, and the spray pipe 71 is connected to the pipe line j.
It is connected to one end of 6. The other end of pipe j6 is the developer tank/
It penetrates the bottom of the tube and opens into the developer tank. Conduit! A circulation pump SR is placed in the middle of the tank 4, so that the developer in the developer tank 4 is supplied to the spray pipe.

A spray pipe 60 is arranged above the barrel guide row 232. This spray pipe 60 is opened along the axial direction and is provided with a plurality of constant discharge ports. This spray pipe TO is also communicated with the V path rt, so that the developer in the developer tank 7≠ is supplied by the operation of the circulation pump jl.

Spray pipe! The discharge port of the spray pipe 60 is opened toward the space between the pair of conveyor rollers t, and the reaction liquid supplied by the circulation pump jr is discharged in this direction.

One end of the pipe line 6≠, which communicates with the developer supplementary tank 1, is opened above the developer tank 1.

A brightening liquid pump 66 is disposed in the middle of this conduit 6hiro. Furthermore, one end of a companion pipe line 70 is opened above the refining tank/44 and communicates with the water supply tank tt, and a water supply pump 72 is disposed in the middle of this pipe line 70. As a result, the existing brightening solution (undiluted solution) in the phenomenon liquid supplement tank 6λ and the water in the water supply tank zIr are supplied to the phenomenon tank/Hiroshi at a predetermined ratio.

Real fig/! One end of the pipe line 7+L is open above the pipe line 7+L. The other end of the pipe 7 passes through the bottom of the developer recovery tank/6 and opens into the developer recovery tank/6. A pump 7z is arranged in the middle of the 9th pipe 7μ. As a result, the developer that overflows into the developer recovery tank lt and is recovered is returned to the developer tank /μ.

One end of the drain pipe 7t is opened at the bottom of the moat tank/hiro, and the other end is opened to the drain tank 10. Is there a valve in the middle of this drain pipe 7t? - is placed. By opening the valve r, the developer in the developer tank 14 is discharged into the drain tank tO. t fF-f
A@Liquid recovery tank/1 has one end opened at the bottom of the liquid recovery tank/1, and the other end thereof opens to the drain tank 10. A valve t6 is disposed in the middle of this drain pipe r≠. The developer in the developer recovery tank/4 is discharged into the drain tank 10 by opening the valve rB.

These circulation pumps and replenisher pump 4A.

The water supply pump 76 is provided in the photosensitive lithographic printing plate automatic developing machine 10 and is connected to a control section rt so that its driving is controlled.

On the insertion side of the pair of transport rollers is the control section r? A detector θ is arranged to be connected to the detector. This detector RI0 detects the passage time of the PS plate lλ at the insertion port of the photosensitive lithographic printing plate automatic developing machine IO, and the preset processing speed of the PS plate and the width dimension of the PS plate are set together by the control unit rr. The area of the PS plate lλ inserted into the photosensitive lithographic printing plate automatic developing machine 10?
It is designed to calculate.

A fatigue level detector octopus is placed in the middle of the 17tt pipe line j, and the fatigue level of the developer is measured by detecting the impedance of the developer. This fatigue level detector tacho is also connected to the control unit tlr.

A slip sheet presence/absence detection sensor μ is arranged on the PS plate/co insertion side of the pair of transport rollers λλ.

This interleaving paper presence/absence detection sensor 21 is connected to the control unit rryc, and when gold paper is attached to the back side of the p/ps version/co, the presence of this interleaving paper is transmitted to the gold control unit tr by an electric signal. It's getting old. This interleaving paper presence/absence detection sensor P4
As L, a contact type detection sensor or a non-contact type detection sensor can be used. For example, PS as a contact type detection sensor.
When the plate/λ is transported and inserted, the contactor is brought into contact with the back side of the PS plate, and the resistance (impedance) between the terminals is
i' is measured by a resistance measuring device. The presence of gold paper can be detected by utilizing the fact that this resistance value is significantly different between cases with and without interleaf paper. For example, there is a non-contact method that irradiates light from a light source onto the back side of PS[/λ, receives the reflected light with a receiver, and detects the intensity of this reflection, which allows the presence of a mount to be detected. You can.

On the other hand, is there a warning means in the control unit rr? Party B is connected. This warning means 96 is activated when the control unit rr detects that gold paper is attached to the back side of the PS plate/co, and issues a warning 7 to notify the operator that the backing paper is attached. It has become.

A buzzer or a warning light can be used as this warning means.

A heater r is arranged at the bottom of the developer tank lμ, and is a button to heat the developer in the developer tank /4t- to a predetermined temperature. This heater Pt is arranged parallel to the guide roller and longer than the guide roller.
The developing solution within μ can be heated uniformly at least in the width direction of the PS plate/co.

The liquid level of the developer in the Mayu developing tank/≠ is covered by a floating lid io.

covered with. This floating lid ioo prevents deterioration of the developer caused by the developer absorbing carbon dioxide gas in the air and neutralizing alkaline components in the developer. This floating lid ioo is made of foamed nylon, so it should be taken into consideration.
It floats on the surface of the developer inside, so it follows even if the surface of the developer rises or falls.

As shown in FIG. 1, the developer recovery tank 16 and the washing tank/r
A pair of upper and lower conveyor rollers 102 are installed at the upper part of the side wall adjacent to the
is located. These pair of conveyance rollers 102 are supported by a pair of side plates (not shown), and are rotated by the driving force of a driving means (not shown) transmitted thereto. An original collection roller /θl disposed inside the developer collection tank /Δ is in contact with the lower conveyance roller /θ−. As a result, it is taken out by the 928 plate/2 and a pair of conveyance rows/θ
The developer that has adhered to the surface is collected into the developer recovery tank.

In addition, a metal row: j/θt is disposed in contact with the upper conveyance roller 10- on the washing tank/l side, so that it adheres to the conveyance rollers/Q and 2 and is returned to the washing tank after being wrung with water. .

The same effect can be obtained even if the metal roller 104 is replaced with a roller made of another material, for example, rubber.

A pair of upper and lower transport rollers /Qr are arranged in the water washing [/J' on the lower i side in the transport direction of the PS plate /Q.

These pair of conveyance rollers ior are also a pair of conveyance rollers 1
Like 0, it is supported by a pair of side plates (not shown),
Like the pair of conveyor rollers/cats, they are rotated by the driving force of a driving means (not shown).

Therefore, the constant PS plate l sent out from the current tank l≠ is conveyed while being held between a pair of conveyor rollers 10λ, and is transferred to the washing tank/? It is inserted between a pair of transport rollers ior, and sent out to a rinsing treatment tank or a desensitization treatment tank 20.

A guide roller //2 is arranged between the pair of transport rollers 102 and the pair of transport rollers 10r, and a spray pipe //≠ is arranged above it. The spray pipe /l≠ is formed as a hollow pipe, and has a plurality of discharge ports formed along the axial direction. Like the guide roller 32, the guide roller 1/co is formed of a pipe, and a plurality of rollers constituting an elastic rotating member are attached to the outer periphery of the spray pipe. Is this a function to supply washing water to Eve//+LIdPS version/λ and guide PS version/2f to this ninth sprayer? It is also equipped with

At the bottom of the washing tank /r, one end of the pipe /10 is opened and the other end is used as a spray pipe, and the other end is used as a guide c1--y//
Spray pipe//Connects to 4A and pipe line/10
A circulation pump //4 is placed in the middle of the washing tank, and the washing water in the washing tank is supplied to the skewer-shaped row) 112 and the spray pipe //≠ to wash the PS plate lλ. ing. The conveyance roller 102 on the raw material side includes a collection roller/lt.
are placed in contact with each other. This forms a trap so that the rinsing water that adheres to the pair of conveyor rollers 102 is collected into the rinsing tank IT.

Furthermore, the upper part of the washing tank IT is connected to the water supply tank TR.
One end of the pipe/20 is open, and a water pump/22 is disposed in the middle of the pipe/20. By operating the tth water supply pump 12, the washing water in the water supply tank tr is supplied into the washing tank /r.

One end of a drain pipe/2 is open at the bottom of the washing tank/r, and the other end communicates with the drain tank l. A valve/cor is disposed in the middle of this drain pipe. When this valve/2t is opened, the washing water in the washing tank lr is discharged into the drain tank/λ6.

These circulation pump //la and water supply pump 12.2 are connected to a control section zr, so that their operations are controlled.

A pair of transport rows ytso are arranged on the downstream side of the washing tank IT in the conveying direction of the PS plates, and above the next rinsing treatment tank or desensitization treatment tank Q. The pair of conveyance rollers/30 are spanned between a pair of side plates (not shown) and are rotatably supported.

A driving force (not shown) is transmitted to the pair of transport rollers IJO to rotate them. The FhPS plate 12 sent out from the pair of conveyance rollers 10r is inserted between the pair of conveyance rollers 3o.

At the top of the rinsing or desensitizing treatment tank λQ, there is a washing tank/between the pair of transport rollers/30 and the pair of transport rollers 10y.
Spray pipe located at l/Hiro, guide roller/
/, Spray pipe similar to 2 / 3λ and guide roller /
3≠ and are arranged. These spray pipes/3
2. The guide roller/311 is in communication with one end of the conduit/36.

The other end of the conduit 36 penetrates the bottom of the rinsing or desensitizing tank θ and projects into the rinsing or desensitizing tank θ. Circulation pump/3♂ in the middle of pipe/36
This circulation pump/3. By the operation of r, the rinsing or desensitizing treatment liquid in the rinsing or desensitizing treatment tank Q is sprayed into the spray pipe/32 and the guide roller 13.
It is designed to be supplied to ≠.

Also, above the rinsing or desensitizing treatment tank 2Q is a pipe line 14.
One end of Lμ is open, and the other end of the pipe l≠Hiro is a rinsing or desensitizing treatment liquid supplement tank/4! -Communicates into 6. A replenisher pump l≠t is placed in the middle of the pipe /l/-hiro, and the operation of this replenisher pump l≠r causes rinsing or desensitization treatment to be carried out in the rinsing or desensitizing treatment tank 2Q. A rinsing or desensitizing treatment liquid is supplied from the liquid auxiliary tank/Hiro 6.

Above the rinsing or desensitizing treatment tank KO is a pipe/μO
One end of the pipe 14Ao is open, and the other end communicates with the water supply tank tr. A water supply pump λ is disposed in the middle of the pipe line 0, and its operation supplies water to the rinsing or desensitization treatment tank 2θ.

t 7'c At the bottom of the IJ bath or desensitization treatment tank 20, one end of a drain pipe 1 to 0 is opened. This conduit/3
The other end of 0 is in communication with the drain tank l and λ.

Drainage tank/! There is a valve l in the middle of λ! Hiro is placed. By opening this valve /j4A, the rinsing or desensitizing treatment liquid in the rinsing or desensitizing treatment tank O is discharged into the drain tank /32.

Circulation pump/3r1 lightening liquid pump l≠r1 water supply pump/
μλ is connected to the control unit rt so that its operation can be controlled.

Next, the operation of this embodiment will be explained.

The artist was printed on the yt-PS version by a printing device (not shown).
λ is a pair of conveyor rollers 2 of the photosensitive lithographic printing plate automatic developing machine
It is inserted into 2.

At this time, is PS version/2 a detector? Whether or not the interleaving paper is attached to the back side is detected by ≠. If interleaving paper is attached, the conveyance of the 28-plate 12 is stopped, and at the same time a warning is issued by the warning means.

If no mount is attached, the PS plate 1 is sent out by a pair of transport rollers 22 at an angle 100 with respect to the horizontal. And guide roller +t2, guide roller 2≠
is guided into the developer tank/l. Developer tank/≠
9PS version/λ is fed into the guide roller 2t%, 2
The developer is guided down by the guide roller 30, and then sent to the center of the developer tank.

The conveyance path through which PSi/K is conveyed within the current irrigation tank L≠ has a shape that protrudes downward, and the curvature of the conveyance path is small near guide rollers B and 2r and is a gentle curve. The curvature of the conveyance path gradually increases near .

The curvature of the conveyance path is at its maximum near the center of the developer tank 14t, but the PS plate is smoothly inserted between the pair of conveyance rollers when its tip is guided by the guide jλ. The pair of conveyance rollers 4tt not only nip and convey the PS plate, but also act as squeeze rollers that squeeze the PS plate, thereby promoting the deformation of the surface of the PS plate. Then, the tPS plate lλ is sent out from a pair of transport rollers and guided by a guide roller that also serves as a spray pipe. The developing solution is sprayed onto the PS plate by Hiroshi and TOK to ensure the development of the PS plate surface. And the PS version is guided by the guide roller J4A, 34.31, and the brush ito
In some cases, the remaining photosensitive layer is completely removed. Further, it is guided by guide rollers 0, ≠Hiro, ≠6, and rises to be sent out from the developer tank/≠.

Furthermore, the PS plate/λ is sprayed in the phenomenon liquid inside the developer tank! Hiroshi, the phenomenon liquid is sprayed by 60, and the developer solution discharged from this spray pipe≠, 6Q mixes with the phenomenon liquid in the developer tank/≠, and the phenomenon liquid in the developer tank/≠ is circulated by the circulation pump! It is circulated by r, passes through the pipe line 6, and is discharged again from the spray pipe ≠ and to.

The surface of the developer is covered by a floating lid ioo. This floating lid 100 prevents deterioration of the developer caused by the developer absorbing carbon dioxide gas in the air and neutralizing alkaline components in the developer.

The 9PS plate/co sent out from the developer tank l≠ is inserted into a pair of transport rollers 102 of the developer recovery tank/6, and is nipped and transported. Due to this nipping, the liquid adhering to the PS plate/2 is squeezed out by the pair of transport rollers/Q-2, and the liquid is drained. After passing through this narrowing area, the developer passes along the surface of the lower pair of transport rollers 102 and is recovered into the developer recovery tank/6 by the recovery roller 10≠. Makugen liquid collection tank 1
6, the water supply tank TR and the water supply pump 72 are driven to collect the developer that overflows when the developer replenisher is replenished into the developer tank/Hiroshi. The developer thus collected into the developer recovery tank/l is then returned to the developer tank l≠ by the pump 76 through the pipe 7hiro as described above.

A pair of conveyor rollers 102' (feeding out 7?: PS version l
The paper is guided by guide rows 21/2 and transported and inserted into a pair of transport rollers ior.

During this conveyance, guide rollers/
Washing water is supplied by the spray pipe /l≠, which also serves as the roller shaft of /2. This washing water washes away the developing solution and deposits adhering to both sides of the 28 plate 12.

The PS plate /λ sent out by the pair of transport rollers 101f is guided by the guide roller 13 and inserted into the pair of transport rollers /30. Immediately before the PS plate is inserted into the pair of transport rollers 30, a rinsing liquid is applied to both sides of the PS plate using a spray pipe that also serves as the roller shaft of the guide roller 13μ. By applying this rinsing liquid, the surface of the 28 plate 12 is protected.

When a large number of 28 plates are developed in a developer tank, the developer becomes exhausted. The degree of fatigue of the developer can be estimated by detecting the area of the 28 plates to be processed with the detector 2Q and calculating it with the controller tt. However, there is a drawback that the degree of fatigue of the developer varies depending on the ratio of the area of the image area to the area of the non-image area of PS[/2 or the carbon dioxide gas in the air. (The wider the area of the image area, the greater the fatigue of the developer.) Therefore, when the impedance of the developer is detected by the detector tacho and the degree of fatigue falls below a predetermined level, the developer replenisher is refilled. A replenishment method is used. However, the detector octopus may also be contaminated with dissolved precipitates from the PS plate/2, precipitates from the current hawk solution components, etc., which may cause an abnormality in the impedance detection value by the detector yo, so the developing solution may become fatigued. To accurately detect the degree, it is usually used in conjunction with the detector RI 0 and the detector tacho. Based on this result, the operating time of the replenisher pump 66 and the water supply pump 2 is calculated by the control unit IT, and the total amount of developer replenisher (undiluted solution) is supplied from the developer replenishment tank 6-2 in accordance with the degree of developer fatigue. The replenisher pump jA and the water supply pump 72 are operated to supply nine bottles from the water supply tank tr at a constant rate. Detected by detector RI0 PS version/
The difference between the required amount of replenisher calculated from the insertion area in step 4 and the required amount of replenisher detected by the detector tacho and calculated from the i/dance of the next developer is abnormal ([ If this is the case, a warning will be issued and all the items will be sold out.Alternatively, as described below, the replenishment method can be automatically or manually switched to a replenishment method based on the insertion area of the 28th edition 12.

That is, the area of the PS plate/λ to be inserted is detected by the detector Q, and the replenisher pump 4 is activated based on this detection result.
The operating times of 4 and the water supply pump 7 are calculated, and the replenisher pump 66 and the water supply pump 7λ are operated in order to supply the developer replenisher in an amount corresponding to the area of the 28 plate 12.

- The power washing tank/r is replenished with washing water by 12 water supply pumps, and the desensitization treatment tank O is replenished with water by a replenisher pump 14c.
Water is replenished at a constant rate by the desensitizing treatment liquid and the water supply pump by r.

The control unit refills each processing liquid and water according to the processing amount of PS version/2! It is controlled by rt.

〔Effect of the invention〕

As explained above, in the present invention, a skin photosensitive lithographic printing plate is printed and developed in a developing tank while being transported along the entire transport path, and then at least a washing treatment, a rinsing treatment, or a desensitization treatment is carried out. A photosensitive lithographic printing plate automatic developing machine that performs one next step process 4, wherein the photosensitive lithographic printing plate is inserted horizontally or downward at an angle of 20 degrees on the insertion side of the developer tank. At least one pair of insertion rollers are arranged, and the radius of curvature when the photosensitive planographic printing plate reaches a maximum curvature in the processing solution of the developer tank is 200 mm to 90 mm.
At least a pair of squeeze rollers for squeezing the current solution on the plate surface of the photosensitive lithographic printing plate arranged to convey the photosensitive lithographic printing plate in a state protruding downward at 0 mm, and on the downstream side of the squeeze roller. Is the liquid solution directed toward at least one of the upper surface or the lower surface of the photosensitive lithographic printing plate? A conveying means consisting of at least one pair of spray nozzles or a guide roller that also serves as a spray nozzle;
a film removing means disposed in at least one of the developing tank or the next-process treatment tank and comprising at least one brush and/or an ultrasonic vibration device for removing the photosensitive layer on the plate surface of the photosensitive lithographic printing plate; At least one pair of conveying rollers arranged to convey the photosensitive lithographic printing plate in the horizontal direction or downwardly with respect to the horizontal direction in the treatment tank of the next step treatment are provided, so that total loss of the photosensitive lithographic printing plate is avoided. The excellent effects of being able to convey the paper smoothly without any problems and processing 28 plates efficiently and reliably in the machine are obtained.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an embodiment of an automatic photosensitive lithographic printing plate developing machine according to the present invention. IO...Photosensitive planographic printing plate automatic developing machine, /2...Photosensitive planographic printing plate (28 plates), /μ...Developer tank, λλ...Transport roller, 21A--≠6...・Guide roller, μ♂...conveyance roller, j≠...spray pipe, /40...brush.

Claims (2)

[Claims] (1) A photosensitive lithographic printing plate on which an image has been printed is conveyed along a conveyance path and developed in a developer tank, and then subjected to at least one of the next steps of washing with water, rinsing, or desensitization. an automatic photosensitive lithographic printing plate developing machine, at least one pair of insertion rollers arranged on the insertion side of the developer tank so that the photosensitive lithographic printing plate is inserted downward at an angle of 200° to 200°; The photosensitive planographic printing plate is arranged so that the photosensitive planographic printing plate is conveyed in a downwardly projecting state with a radius of curvature of 200 mm to 900 mm when the photosensitive planographic printing plate reaches a maximum curvature in a processing solution in a developing tank. At least a pair of squeeze rollers that squeeze the developer on the surface of the printing plate, and at least a pair of sprayers that squirt the developer toward at least one of the upper surface and the lower surface of the photosensitive lithographic printing plate downstream of the squeeze roller. a conveyance means consisting of a nozzle or a guide roller that also serves as a spray nozzle; and at least one brush disposed in at least one of the developing tank or the next process treatment tank for removing the photosensitive layer on the plate surface of the photosensitive lithographic printing plate. and/or a film removing means comprising an ultrasonic vibrator, and at least a pair of conveyance rollers arranged to convey the photosensitive lithographic printing plate horizontally or downwardly with respect to the horizontal direction in the treatment tank for the next step. An automatic photosensitive lithographic printing plate developing machine comprising: (2) The material of the pair of squeeze rollers is synthetic rubber having a Vickers hardness of 15 to 60 degrees, and the nip pressure of the pair of squeeze rollers is 1 to 10 kg/cm^.
2. The photosensitive lithographic printing plate automatic developing machine according to claim (1), characterized in that: