JPH05265225A - Automatic developing machine for photosensitive planographic printing form - Google Patents

Abstract

PURPOSE:To provide an automatic developing machine for a photosensitive planographic printing form by which an insertion port and a discharge port of a casing surrounding a developing tank can be blocked up reliably and the photosensitive surface of the photosensitive planographic printing form can be passed through the discharge port without damaging it. CONSTITUTION:A developing part 22 and so on are covered with a casing 100, and a blade 106 is installed on the inner surface side of an insertion port 102, and blocks up the insertion port 102. When a PS impression 12 is conveyed to the insertion port 102, the insertion port 102 is enlarged/opened against an elastic force. A sensor 108 is installed in the vicinity of the insertion port 102. A cover body 110 of a discharge port 104 can make turning motion with a shaft 112 as its center, and can open/close the discharge port 104. While the sensor 108 is detecting the PS impression 12, and until a prescribed time is passed after detection is not carried out, the cover body 110 is held in an open condition of the discharge port 104, and is put in a blocked condition except that time, and when the PS form 12 is passed through the discharge port 104, the contact of this PS form 12 with the cover body 110 is not caused at all.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a photosensitive lithographic printing plate material, which is conveyed while being immersed in a developing tank in which a developing solution is stored, to be subjected to a developing treatment, a rinsing treatment with rinsing water, and a desensitizing treatment with a gum solution. The present invention relates to an automatic processor for a photosensitive lithographic printing plate which is then dried to obtain an image.

[0002]

2. Description of the Related Art In a photosensitive lithographic printing plate automatic developing machine (hereinafter referred to as "PS plate processor") for processing a photosensitive lithographic printing plate, generally, the PS plate is developed, washed with water and treated with gum while being transported substantially horizontally in the apparatus. Etc. are being processed.

A PS plate on which an image is recorded by a printing device is
It is sent to the PS plate processor and is immersed in a developing solution while being conveyed in a developing tank, or the developing solution is sprayed onto the image recording surface (front surface) for development processing.

The developed PS plate is washed with water in the washing part (washing process), coated with a gum solution in the finisher part to protect the plate surface (desensitizing process), and then dried.

However, when a processing solution such as a developing solution is exposed to the outside air, the degree of fatigue may increase (CO ₂ fatigue, O ₂ fatigue) and the developing ability may decrease. If the developing ability deteriorates quickly, the replenishment time of the replenisher is accelerated, and the consumption of the replenisher increases. Therefore, for example, Japanese Patent Laid-Open No.
As disclosed in the improvement of No. 87833, it is considered that a floating lid or the like is arranged on the liquid surface of the developing tank storing the developing solution to reduce contact with the outside air. The lid alone is insufficient because there are many gaps. Further, the automatic developing machine has a heating portion for the purpose of heating the developing solution, and the evaporation of water in the developing solution is considerably large. As a result, adherence to the roller due to deposition and drying of the components on the nip portion of the transport roller, transfer of adhered material onto the plate, clogging of the spray pipe holes, active change of the developer, etc., and maintenance is difficult. there were.

In order to solve this problem, it is conceivable to cover the developing tank with a casing. In this case, a pair of blades that normally abut with each other by elastic force to close the insertion port and the ejection port are attached to the insertion port and the ejection port of the PS plate, respectively, and the outside air enters from the insertion port and the ejection port. (For example, JP-A-3-23124).
(See Japanese Patent Publication No. 5).

[0007]

However, if the opening of each of the insertion port and the ejection port is closed by a pair of blades, the blades come into contact with the photosensitive surface when the PS plate passes. On the insertion port side, that is, before development, if the pressing force at the time of contact of the blade is made small, there is almost no problem, but if the blade is in contact with the discharge port, that is, the photosensitive surface of the PS plate after development is completed. However, it is not preferable because it affects the image quality.

In consideration of the above facts, the present invention reliably blocks the insertion port and the discharge port of the casing surrounding the developing tank and allows the photosensitive planographic printing plate to pass through the discharge port without damaging the photosensitive surface. The purpose is to obtain an automatic developing machine for lithographic printing plates.

[0009]

According to a first aspect of the present invention, a photosensitive lithographic printing plate material is transported while being immersed in a developing tank in which a developing solution is stored for development processing, and rinsing with rinsing water, An automatic developing machine for a photosensitive lithographic printing plate which obtains an image by drying after desensitizing treatment with a gum solution, which is provided with an inlet and an outlet for the photosensitive lithographic printing plate and surrounds at least the developing tank. A casing for preventing the developing solution from being exposed to the outside air, a first lid provided at the insertion opening of the casing and normally closed, and a photosensitive material provided at the discharge opening of the casing to discharge the photosensitive material from the inside of the casing. And a normally-closed second lid that is not in contact with the photosensitive material that is sometimes opened and discharged from the discharge port.

The invention according to claim 2 is characterized in that a liquid surface lid is provided which is in contact with the surface of the developer stored in the developing tank and shields it from the air.

[0011]

According to the first aspect of the invention, when the photosensitive lithographic printing plate reaches the insertion port, the first lid is opened and the photosensitive lithographic printing plate is smoothly inserted into the casing. As the first lid, for example, if a pair of blades having an elastic force is provided, it is possible to normally contact each other with the elastic force to close the insertion port, and at the time of inserting the photosensitive lithographic printing plate. Since the photosensitive lithographic printing plate spreads against the elastic force due to the pressing force during the transportation, the photosensitive material is smoothly inserted through the insertion port.

The photosensitive material is dipped in a developing solution in a developing tank,
Then, after being washed with water and desensitized, it reaches the discharge port. Here, the second lid provided in the discharge port is normally closed, and at least when the photosensitive lithographic printing plate is discharged from the inside of the casing,
The photosensitive lithographic printing plate is discharged from the discharge port without making contact with this lid. That is, the image quality can be protected without any trouble such as damage to the image formed on the photosensitive surface of the photosensitive lithographic printing plate.

According to the second aspect of the present invention, by using the developing lid together with the casing, it is possible to make more complete insulation from the air by coming into contact with the surface of the developing solution in the developing tank.

Here, in the conventional apparatus, the smaller the development processing area per day, the more the amount of evaporation of water influences, and it is necessary to increase the replenishment amount of the developing solution per processing area. For example, since there is no problem of evaporation, an extremely small constant replenishment amount is sufficient regardless of the processing area per day, and a complicated and expensive automatic replenishing device is not required. In addition, the device cost can be reduced.

Further, for the same reason, the dried solid of the processing liquid is not deposited on the roller driving mechanism and the spray hole, and the contamination of the wall in the processing tank is reduced, so that the maintenance of the apparatus is improved.

Further, in addition to the above-described merit that the fatigue of the processing liquid is small and the replenishment amount does not depend on the processing area of the plate, there is an effect that the processing stability is improved.

Furthermore, since the amount of replenishment is small and the amount of waste liquid is small, there is an effect that the running cost is also low.

[0018]

1 and 2 show a photosensitive lithographic printing plate automatic developing machine (hereinafter referred to as "PS plate processor") 10 according to this embodiment. PS version processor 10
A photosensitive planographic printing plate (hereinafter referred to as "PS plate") 12 having an image printed by a printing device (not shown) is developed by the PS plate processor 10 and then dried.

As shown in FIG. 1, the PS plate processor 10 has an inner processing portion covered with an outer panel 14. The outer panel 14 is provided with an insertion table 16 for feeding the PS plate 12 (see FIG. 2) inward.
The PS plate 12 is placed on the insertion table 16
Is inserted into the inside of the outer panel 14 through the opening on the back side.

As shown in FIG. 2, inside the outer panel 14, a developing tank 18 for developing the PS plate 12 and an overflow tank 20 for collecting the developing solution overflowing from the developing tank 18 are provided. Part 22 and PS version 1
Washing section 24 for washing the developer adhering to No. 2 by washing with water
And a finisher section 26 for desensitizing the PS plate 12 after washing with water by applying a gum solution.

The washing section 24 is provided with a washing tank 28, and the finisher section 26 is provided with a gum solution tank 30.

As shown in FIGS. 2 and 3, in the developing section 22, the water washing section 28, and the finisher section 26, the outer panel 14 is covered with another box-shaped casing 100. That is, the PS version processor 10 of the present embodiment is
The casing 100 and the outer panel 14 have a double structure. The casing 100 is provided with a slit-shaped insertion opening 102 and a discharge opening 104, respectively, and the insertion opening 102 is provided corresponding to the rear side opening of the insertion table 16. On the other hand, the discharge port 104 is provided corresponding to the inlet of the drying section 31 provided on the downstream side of the finisher section 26, as shown in FIG. Casing 10
0 basically has no openings other than the insertion port 102 and the ejection port 104.

The drying unit 31 conveys the PS plate 12 (see FIG. 2) sent from the finisher unit 26 by a large number of rollers (not shown), and blows warm air on the surface of the PS plate 12 to dry it. It is like this. The dried PS plate 12 is discharged from the PS plate processor 10, and is discharged to, for example, a stocker (not shown) that leans the PS plate 12 and stores it.

As shown in FIG. 2, a pair of conveying rollers 3 is provided on the side of the developing section 22 where the PS plate 12 is inserted into the developing tank 18.
2 is disposed, and the PS plate 12 having an image printed between the pair of conveying rollers 32 is the casing 100.
It is designed to be inserted from the insertion port 102 of the. The pair of conveying rollers 32 holds the PS plate 12 in the horizontal direction by one.
It is designed to be sent out to the developing tank 18 at an angle of 5 °.

On the inner surface side of the insertion port 102, a pair of rubber blades 10 having elastic force at the vertical edges thereof.
6 is attached. These blades 106 have a middle portion bent in an arc shape, and the tip thereof is the PS plate 12
Is directed to the downstream side in the transport direction of.

In this state, the tips of the blades 106 are brought into contact with each other by the elastic force of each other to close the insertion opening 102.

Here, when the PS plate 12 is conveyed to the insertion port 102, the pair of blades 106 are expanded against the elastic force by the pressing force at the time of conveying the PS plate 12. Is becoming Therefore, the PS plate 12 can be smoothly fed into the casing 100.

In the vicinity of the insertion port 102, PS
A sensor 108 for detecting the presence or absence of the plate 12 is attached. It can be recognized by the sensor 108 that the PS plate 12 exists inside the casing 100.

The developing tank 18 has a substantially inverted mountain shape with an upper opening and a bottom central portion protruding downward. A developing solution is contained in the developing tank 18. Further, in the developing tank 18, a large number of guide rollers 34 having the same diameter are arranged along the bottom portion. These guide rollers 34
Is a skewer roller and is rotatably provided between a pair of side plates of the developing tank 18.

A guide roller 36 having a diameter larger than that of the guide roller 34 is arranged above the upstream guide roller 34, and a rotating brush roller 38 and a guide roller 40 are arranged above the downstream guide roller 34, respectively. It is rotatably supported between a pair of side plates of the developing tank 18.

A pair of squeezing rollers 42 having a function of squeezing the surface of the PS plate 12 are arranged in the center of the developing tank 18. These guide rollers 34,
36, 40, rotating brush roller 38, and diaphragm roller 42
The driving force of a driving means (not shown) is transmitted to and rotates, and the PS plate 12 is conveyed at a constant speed.

In the vicinity of the bottom of the developing tank 18, the PS plate 12 is arranged to be conveyed with a radius of curvature of 300 to 350 mm by a pair of squeezing rollers 42 and a plurality of guide rollers 34 adjacent thereto. .. Therefore, the PS plate 12 nipped and conveyed by the pair of conveyance rollers 32 and inserted into the developing tank 18 is obliquely conveyed between the guide rollers 34 and 36, and is obliquely downward by the plurality of guide rollers 34. And is inserted between the aperture rollers 42. The squeeze roller 42 elutes into the developing solution from the photosensitive layer side of the PS plate 12 (the upper side of the paper surface of FIG. 2) to remove waste products from the surface, and the waste products are conveyed to the downstream side as the PS plate 12 moves. Isolate so that it will not be

PS plate 1 sent from the squeezing roller 42
2 is directed obliquely upward by the guide roller 34,
It is guided by the rotating brush roller 38 and the guide roller 40 and is discharged from the developing tank 18. By this, PS
The plate 12 is transported smoothly and surely while being immersed in the developing solution without applying an excessive force.

The closest guide roller 34 on the downstream side of the squeezing roller 42 is a skewered roller in which a plurality of elastic rotating members are axially supported on the outer circumference of the shaft, and the roller shaft is formed of a hollow pipe. This hollow pipe forms a spray pipe 44 having a discharge port opened between elastic rotating members along the axial direction. In addition, spray pipes 46 and 48 are disposed above the conveyance path of the PS plate 12 and near the pair of squeezing rollers 42. Spray pipe 46,4
A large number of discharge ports 8 (not shown) communicating with the inside along the axial direction are provided on the outer peripheral surface of the hollow pipe 8 and are arranged so that the axial direction is along the width direction of the conveying path. The spray pipes 46, 48 and the spray pipe 44 of the guide roller 34 discharge the developing solution toward the front surface and the back surface of the PS plate 12. Spray pipes 44, 4
Reference numerals 6 and 48 are for discharging the developing solution toward the upstream of the PS plate 12, and the waste products of the PS plate 12 at the initial stage of development are discharged to the PS plate 12.
Supply fresh developer with exclusion from the surface.

On the surface of the developing solution in the developing tank 18, the liquid level lid 5
0 is placed. The liquid surface lid 50 is a rotary brush 38.
The portion corresponding to is projected in a substantially arc shape, and is floated on the surface of the developing solution in order to minimize the contact between the developing solution surface between the guide rollers 36 and 46 and the air. Light-weight materials such as polyvinyl chloride, polyethylene, and polyamide are selected as the material.

An overflow tank 20 is provided on the downstream side of the developing tank 18 in the carrying direction, and the PS plate 12 is carried above the overflow tank 20. Further, the wall surface of the developing tank 18 on the downstream side in the transport direction is bent toward the outside, and the tip thereof is located above the overflow tank 20. Therefore, when the developer in the developer tank 18 is full and overflows, the developer overflows and flows into the overflow tank 20.

Above the overflow tank 20, there is arranged a pair of rollers 54 for sandwiching and conveying the PS plate 12 discharged from the developing tank 18 and squeezing the developing solution from the surface of the PS plate 12.

On the other hand, in the PS plate processor 10, a water washing tank 28 of the water washing section 24 is arranged downstream of the overflow tank 20 of the developing section 22. Above the washing tank 28,
As shown in FIGS. 4 and 5, a pair of conveyance rollers 52 is arranged. These transport rollers 52, 54 are rotatably supported by a side plate (not shown), and are rotated by transmitting the driving force of a driving means (not shown). The PS plate 12 sent from the developing unit 22. Forming a transport path of.

The washing tank 28 stores washing water after washing off the developing solution from the PS plate 12 sent from the developing tank 18. A spray pipe 56 is disposed on the upstream side of the transport roller 52 and above the transport path, and three discharge ports 58 (see FIG. 4) communicating with the interior are provided on the outer periphery of the spray pipe 56. It is provided. The washing water is dropped from the spray pipe 56 onto the surface of the PS plate 12, and the surface of the PS plate 12 is washed with the washing water.

On the upstream side of the spray pipe 56,
A blade 60 having flexibility is arranged. The blade 60 is arranged at a position where the tip of the blade 60 interferes with the movement path of the conveyance path, and comes into contact with the surface of the PS plate 12 being conveyed. Therefore, the blade 56 has a role of retaining the washing water dropped from the spray pipe 56.

The lower portion of the lower conveying roller 52 is accommodated in the tray 62. The washing water is stored in the tray 62, and the lower surface of the PS plate 12 is washed by being pumped up by the lower transfer roller 52 and the upper transfer roller 52 is prevented from drying.

As shown in FIG. 4, the spray pipe 56.
When the rinsing water drops from the stencil and reaches the blade 60, the rinsing water forms a receiving portion on the surface of the PS plate 12 and the upper transport roller 52, so that a small amount of the rinsing water is formed on the PS plate 12. And is diffused along the width direction of the PS plate 12. Therefore, the surface of the conveyed PS plate 12 can be sequentially washed with water.

Here, the stored washing water is the blade 6
Since the front end portion of 0 is in contact with the surface of the PS plate 12, backflow is prevented.

Further, the rinsing water diffused in the width direction on the surface of the PS plate 12 is configured to drop from the both ends of the PS plate 12 in the width direction to the tray 62 below.

As shown in FIG. 2, the finisher section 2
A pair of transport rollers 78 is provided above the gum solution tank 30 of No. 6. A guide roller 80, which is a skewered roller, is disposed below the transport path between the transport roller 78 and the pair of transport rollers 52. Conveyor roller 5
The PS plate 12 sandwiched by the two and sent out is guided by the guide roller 80 to the conveying roller 78.

Further, the guide roller 80 and the conveying roller 78
A spray pipe 82 is disposed above the transport path between the and. These spray pipes 82 are also provided with discharge ports (not shown) communicating with the inside on the same outer periphery as the spray pipes 56. This spray pipe 8
From 2, the gum liquid is discharged and supplied to the surface of the PS plate 12 via the surface of the transport roller 78 as described below.

The tip of the flexible blade 84 is in contact with a part of the outer periphery of the upper conveying roller 78. When the gum liquid from the spray pipe 82 is dripped from above in the vicinity of the boundary between the blade 84 and the upper conveying roller 78, the gum liquid spreads along the contact surface of the conveying roller 78 to both widthwise end portions of the PS plate 12, and the upper side. A liquid film is formed in the width direction of the carrying roller 78, and is measured on the surface of the carrying roller in the gap between the blade 84 and the carrying roller 78 as the carrying roller rotates, so that the liquid film is spread over the entire width of the PS plate 12. It has become. Therefore, it is possible to perform the gum liquid application treatment on the surface of the PS plate 12 with a small amount of gum liquid.

The conveying rollers 78 sandwich and convey the PS plate 12 and squeeze the gum solution adhering to the surface of the PS plate 12. The gum solution squeezed from the surface of the PS plate 12 is collected in the gum solution tank 30.

In the lower part of the lower carrying roller 78,
A tray 86 is provided so that a part of the gum solution squeezed by the transport roller 78 is stored. A part of the lower transport roller 78 is provided in the tray 86.
The back side of the PS plate 12 is dipped in the gum solution stored in, and the lower carrying roller 78 pumps up the gum solution from the tray 86 to perform a coating process. As a result, the transporting roller 78 takes out the gum solution to desensitize the back surface of the PS plate 12 and suppresses the drying of the upper transporting roller 78, so that the components of the processing solution are not deposited on the surface of the transporting roller 78. It has become.

The PS plate 12, which has been processed by the finisher section 26, passes through the discharge port 104 of the casing 100 and is sent to the drying section 31.

Here, the discharge port 104 is provided with a lid 110. The lid 110 has a flat plate shape, and an axis 112 whose upper side has an axis parallel to the width direction of the PS plate 12.
The shaft 112 is pivotally supported by a bracket 114 attached to the upper end of the discharge port 104. Therefore, the lid 110 is rotatable about the shaft 112, and when the lid 110 is in the vertical position, the outlet 104 is closed by a spring or by gravity.

The shaft 112 is rotatable by a driving means (not shown) (for example, a solenoid), and the lid 110 is swung within a range of about 90 ° with the rotation of the shaft 112. ing. Here, when the lid 110 is in a substantially horizontal position, the discharge port 104 is opened.

The rotation of the shaft 112 is made based on the detection of the PS plate 12 by the sensor 108 provided near the insertion opening 102. That is, the sensor 108
The lid 1 is detected while the plate 12 is being detected and from when the plate 12 is no longer being detected (after the rear end is detected) until a predetermined time elapses.
10 is held substantially horizontally (the discharge port 104 is open),
Other than that, it is designed to be vertical (the discharge port 104 is closed).

Therefore, when the PS plate 12 passes through the discharge port 104, there is no contact between the PS plate 12 and the lid 110.

The operation of this embodiment will be described below. First,
When the PS plate processor 10 is not developing the PS plate 12, the insertion openings 102 of the casing 100 are in contact with each other due to the elastic force of the pair of blades 106, and thus are closed. On the other hand, since the discharge port 104 does not detect the PS plate 12 by the sensor 108, the lid 110 is in the vertical state, and the discharge port 1
04 is also blocked. Therefore, the developing solution in the developing tank 18 is not exposed to the outside air, and CO ₂ fatigue is hardly generated. For this reason, it is possible to suppress a decrease in developing ability due to deterioration over time, and thus it is possible to drastically reduce the amount of replenisher to be replenished. In particular, since the surface of the developing solution in the developing tank 18 is covered with the liquid surface lid 50, the effect of preventing contact between the developing solution and the outside air is great.

Next, the processing procedure of the PS plate 12 will be described. The PS plate 12 on which an image is recorded by a printing device (not shown) or the like is placed on the insertion table 16 and fed to the back side of the insertion table 16. As a result, the PS plate 12 reaches the insertion opening 102 of the casing 100. Casing 10
The PS plate 12 reaching the insertion port 102 of 0 spreads the blade 106 against the elastic force due to the pressing force during the transportation. Therefore, the PS plate 12 is smoothly inserted into the casing 100.

The tip of the PS plate 12 has the insertion opening 10
When passing 2, the sensor 108 detects this,
The shaft 112 is rotated to swing the lid 110 of the discharge port 104 from a vertical state to a substantially horizontal state. As a result, the discharge port 104 is opened. The sensor 108 is the PS plate 12
It is also possible to input a signal to the CPU when the leading edge of the sheet is detected and open the discharge port at an appropriate timing from the conveying speed.

PS plate 1 inserted in casing 100
2 is first sent to the developing unit 22. When the PS plate 12 is inserted into the PS plate processor 10, the PS plate processor 10 sends the PS plate 12 to the developing tank 18 by the conveying roller 32.

The PS plate 12 is sent out by the conveying roller 32 at an angle of 15 ° with respect to the horizontal, and is guided by the guide roller 34.
And the like are conveyed in the developing tank 18. At this time, the PS plate 12 is conveyed while being sprayed with a developing solution by the spray pipes 44, 46, and 48, and is subjected to a developing process.

The relatively fresh developing solution discharged from the spray pipes 44, 46 and 48 into the developing tank 18 is PS.
As the development of the plate 12 progresses, waste products eluted near the photosensitive layer side are blown away to accelerate development. Further, the developer discharged from the spray pipes 44, 46, 48 is supplied to the surface of the PS plate 12 from which waste products have been removed by the squeeze roller 42, so that the development of the PS plate 12 can be further promoted. it can. After that, the surface of the PS plate 12 on the photosensitive layer side is rubbed by the rotating brush 38 to promote development,
The photosensitive layer in the non-image areas is removed.

The developed PS plate 12 is washed with water 24.
And is nipped and conveyed by the conveyance rollers 52. At this time, the PS plate 12 is washed with washing water discharged from the spray pipe 56.

Here, the water washing process in the water washing unit 24 will be described in detail.
The tip of the blade 60 is in contact with the surface of the S plate 12. Therefore, the blade 60, the surface of the PS plate 12, and the upper transport roller 52 form a receiving portion for the washing water discharged from the spray pipe 56.

Therefore, even if the amount of washing water is small, this washing water can be stored, so that the spray pipe 5
The amount of washing water discharged from 6 can be extremely small. In this embodiment, three discharge ports 58 are formed in the spray pipe 56 to supply a small amount of washing water.

The washing water stored in the receiving portion is the PS plate 12
As a result, a liquid film is formed on the surface of the PS plate 12, and the surface can be reliably cleaned. Further, since the backflow of the washing water is prevented by the blade 60, it does not flow out to the developing section.

The washing water reaching both widthwise ends of the PS plate 12 drops from the surface and reaches the receiving tray 62. It flows into this tray 62 from both ends in the longitudinal direction.

The lower conveying roller 52 immersed in the tray 62 pumps the washing water in the tray 60 by rotation to wash the back surface side of the PS plate 12.

Upon completion of the water washing process, the PS plate 12 is guided by the guide rollers 80 and sent to the finisher section 26, and is nipped and carried by the carrying rollers 78. Here, the desensitizing process is performed by the gum solution discharged from the spray pipe 82.

In the finisher section 26, the blade 84 is in contact with the peripheral surface of the upper conveying roller 78, and the gum liquid discharged from the spray pipe 82 is stored between the blade 84 and the upper conveying roller 78. And PS
A liquid film is formed by spreading on both ends of the plate 12 in the width direction.
Therefore, the surface of the PS plate 12 can be surely desensitized. The back side of the PS plate 12 is the saucer 8
Since the gum solution stored in No. 6 is pumped up and processed by the lower carrying roller 78, the desensitizing process on the back side of the PS plate 12 can be surely performed.

PS discharged from the finisher section 26
The plate 12 reaches the discharge port 104 of the casing 100.

The discharge port 104 is provided with a lid 110. Since the shaft 112 is rotated by the detection of the PS plate 12 by the sensor 108, the lid 110 is in a substantially horizontal state. , PS plate 1 passing through the outlet 104
There is no interference between 2 and this lid 110. Therefore, the image quality can be protected without rubbing the photosensitive surface of the developed PS plate 12.

When a predetermined time elapses after the sensor 108 detects the rear end of the PS plate 12, the lid 110 is in a vertical state, that is, the discharge port 104 is closed, but the lid 110 passes through the casing 100. Since the time is constant, the lid 110 swings to close the discharge port 104 after the rear end of the PS plate 12 has surely come out of the discharge port 104.

The PS plate 12 that has passed through the discharge port 104 is dried in the drying section 31 and discharged from the PS plate processor 10 to complete the process.

For the purpose of the present invention of minimizing the contact between the developing solution and the outside air, it is better to shorten the time when the lid 110 is opened. Therefore, P
A structure in which the S plate 12 is opened only while the S plate 12 is passing therethrough and is closed during other periods is preferable. So, for example,
A sensor is arranged near the inside of the discharge port, the lid 110 is opened by detecting the tip of the PS plate 12, and when the rear end of the PS plate passes, the time until the rear end completely comes out of the discharge port is determined by the PS plate. It is possible to determine the time from the transport speed and set the time in a timer to close the lid 110.

Furthermore, in the above embodiment, an example in which the entire automatic developing machine is surrounded by a casing has been described.
There may be a structure in which there is no gap between the processing tanks, and a cover may be provided on the upper surface of the entire processing tank without any clearance. A structure that covers only the developing tank is also effective.

[0075]

As described above, the automatic developing machine for the photosensitive lithographic printing plate according to the present invention surely closes the insertion port and the discharge port of the casing that surrounds the developing tank, and the photosensitive surface of the photosensitive lithographic printing plate. It has an excellent effect that it can pass through the discharge port without being damaged.

[Brief description of drawings]

FIG. 1 is a perspective view of a PS plate processor according to an embodiment.

FIG. 2 is a schematic configuration diagram of a PS plate processor according to the present embodiment.

FIG. 3 is a perspective view of a casing according to the present embodiment.

FIG. 4 is a perspective view of a water washing section.

5 is a sectional view taken along line VV of FIG.

[Explanation of symbols]

 10 PS Plate Processor 12 PS Plate 22 Developing Section 24 Water Washing Section 26 Finisher Section 100 Casing 102 Insertion Port 104 Ejection Port 106 Blade (First Lid) 110 Lid (Second Lid)

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[Procedure amendment]

[Submission date] May 1, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0001

[Correction method] Change

[Correction content]

[0001]

FIELD OF THE INVENTION The present invention relates to a photosensitive lithographic printing plate material, which is conveyed while being immersed in a developing tank in which a developing solution is stored, to be subjected to development processing, rinsing with rinsing water, and desensitizing with gum solution. The present invention relates to an automatic developing machine for a photosensitive lithographic printing plate which obtains an image.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

[0009]

According to a first aspect of the present invention, a photosensitive lithographic printing plate material is transported while being immersed in a developing tank in which a developing solution is stored for development processing, and rinsing with rinsing water, An automatic developing machine for a photosensitive lithographic printing plate to obtain an image by desensitizing treatment with a gum solution, the developing solution being provided with an insertion port and an ejection port for the photosensitive lithographic printing plate and surrounding at least the developing tank. A casing for preventing exposure to the outside air, a first lid provided in the insertion opening of the casing and normally closed, and a photosensitive material provided in the discharge opening of the casing when the photosensitive material is discharged from the inside of the casing. And a normally closed second lid that is not in contact with the photosensitive material that is opened and discharged from the discharge port.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0020

[Correction method] Change

[Correction content]

As shown in FIG. 2, inside the outer panel 14, a developing section 22 having a developing tank 18 for developing the PS plate 12 and a developer adhering to the PS plate 12 are washed with water. Washing section 24 for washing with water and PS plate 12 after washing
And a finisher portion 26 for applying a desensitizing treatment by applying a gum solution to the.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0036

[Correction method] Delete

[Procedure correction 6]

[Document name to be amended] Statement

[Name of item to be corrected] 0037

[Correction method] Change

[Correction content]

At the most downstream portion of the developing tank 18, the PS plate 12 discharged from the developing tank 18 is nipped and conveyed, and P
A roller pair 54 for squeezing the developing solution from the surface of the S plate 12 is arranged.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0038

[Correction method] Change

[Correction content]

On the other hand, the PS plate processor 10 is provided with a washing tank 28 of the washing section 24 on the downstream side of the developing section 22. Above the washing tank 28, as shown in FIGS. 4 and 5, a pair of transport rollers 52 are arranged. These conveying rollers 52 are rotatably supported by a side plate (not shown), and are rotated by transmitting the driving force of a driving means (not shown).
A conveyance path for the S plate 12 is formed.

[Procedure Amendment 8]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 2

[Correction method] Change

[Correction content]

[Fig. 2]

Claims (2)

[Claims] 1. A photosensitive lithographic printing plate material is conveyed while being immersed in a developing tank in which a developing solution is stored for development processing, washed with rinsing water, desensitized with a gum solution and then dried to form an image. An automatic developing machine for obtaining a photosensitive lithographic printing plate,
A casing that is provided with an insertion port and a discharge port for the photosensitive lithographic printing plate and that surrounds at least the developing tank to prevent the developer from being exposed to the outside air; and a first normally-closed casing provided at the insertion port of the casing. And a normally closed second lid body that is not in contact with the photosensitive material that is provided at the discharge port of the casing and that is opened when the photosensitive material is discharged from the casing and discharged from the discharge port. An automatic developing machine for a photosensitive lithographic printing plate having: 2. The automatic developing machine for a photosensitive lithographic printing plate according to claim 1, further comprising a liquid surface cover which is in contact with the surface of the developing solution stored in the developing tank and shields it from the air.