JPH01310354A - Processing machine for photosensitive planographic printing plate - Google Patents

Abstract

PURPOSE:To improve the transporting property of a photosensitive planographic printing plate by forming a guide roller for guiding the photosensitive planographic printing plate to paired rollers to the diameter larger than the diameter of the other guide rollers. CONSTITUTION:The guide rollers 24, 26, 28, 34, 38, 40 are disposed in a develop ing tank 14. The guide roller 42 having the diameter larger than the diameter of the roller 24 is disposed above the roller 24. Further, the guide roller 30 is disposed between the roller 28 and a pair of the transporting rollers 48 and is formed to the diameter larger than the diameter of the rollers 24, 26, 28, 32, 36, 38, 40. The transporting route through which the photosensitive planographic printing plate 12 is transported in the developing tank 24 has the shape projecting downward and as the gentle curve of the small curvature of the transporting route near the rollers 26, 28, but the curvature of the transporting route increases gradually near the roller 30. The printing plate 12 is, therefore, smoothly sent to the central part of the developing tank 14 by the roller 30.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a photosensitive lithographic printing plate processing machine in which a photosensitive lithographic printing plate on which an image has been printed is conveyed through a processing liquid in a processing tank and processed. Regarding.

[Prior Art] A photosensitive lithographic printing plate processing machine conveys a photosensitive lithographic printing plate on which an image has been printed along a conveyance path, and performs development processing, water washing processing, desensitization processing (e.g., finisher, rinse gum, Gum) liquid treatment, etc. are performed sequentially.

Such photosensitive lithographic printing plates include ones 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 installed in a processing tank that performs the above processing, such as a developing tank, and the photosensitive planographic printing plate is guided through the processing liquid by these guide rollers and subjected to immersion processing. There is.

The transport path for transporting the photosensitive lithographic printing plate in the processing tank starts from the insertion port for the photosensitive lithographic printing plate above the processing liquid level, descends into the processing liquid, then rises, returns to the processing liquid level, and exits. It draws a gentle curve towards. The photosensitive planographic printing plate is conveyed along this conveyance path in a so-called curled state. In this manner, guide rollers are arranged to guide the photosensitive lithographic printing plate within the processing tank and to smoothly insert the photosensitive planographic printing plate between the pair of nipping rollers within the processing tank.

[Problems to be Solved by the Invention] However, the photosensitive planographic printing plate may not be conveyed smoothly along the conveyance path in the processing tank, or the photosensitive planographic printing plate may have reverse curls. If the diameter of the guide roller that guides the photosensitive lithographic printing plate between the nip pair of rollers is small, it is not possible to reliably guide the photosensitive lithographic printing plate between the nip pair of rollers, resulting in poor conveyance. Ta.

In consideration of the above facts, the present invention has been developed for photosensitive lithographic printing, which is capable of improving the transportability of the photosensitive lithographic printing plate in the processing tank, and is capable of reliably inserting the photosensitive lithographic printing plate into the pair of clamping rollers. The purpose is to obtain a plate processing machine.

[Means for Solving the Problems 1] The present invention provides a photosensitive lithographic printing plate processing machine in which a photosensitive lithographic printing plate on which an image has been printed is transported through a processing liquid in a processing tank and processed, at least one guide roller disposed in the processing tank to guide the photosensitive planographic printing plate; a pair of rollers disposed in the processing tank to sandwich and convey the photosensitive planographic printing plate; and a pair of rollers having a diameter equal to the diameter of the guide roller. a large-diameter guide roller that is larger than the diameter of the photosensitive planographic printing plate and is disposed on the insertion side of the photosensitive planographic printing plate to the paired roller and guides the photosensitive planographic printing plate to the paired roller; The present invention is characterized in that a guide is provided, which is disposed between the guide rollers of the same diameter and guides the photosensitive planographic printing plate between the pair of rollers.

[Function] Therefore, in the present invention, the photosensitive planographic printing plate is guided by a guide roller whose diameter is larger than that of the other guide rollers, and the leading edge of the photosensitive planographic printing plate is guided by the guide plate and inserted between the pair of rollers. As a result, the material is pinched and transported through the processing tank. This ensures that the photosensitive lithographic printing plate is processed reliably.

The diameter of the guide roller that guides the photosensitive lithographic printing plate between the pair of rollers is larger than that of the other guide rollers, so the conveyance of the photosensitive lithographic printing plate is improved, and the distance between the guide roller and the pair of rollers is increased. Even if the photosensitive planographic printing plate has a tendency to reverse curl, it can be reliably inserted between the pair of rollers by the guides arranged in the plate.

[Example] FIG. 1 shows an example of a photosensitive lithographic printing plate processor IO according to the present invention.

The photosensitive lithographic printing plate processing machine 10 includes a developer tank 14 for developing a photosensitive lithographic printing plate (hereinafter referred to as "FPS plate") 12 on which an image has been printed by a printing device (not shown), and a developer tank 14 from which an image is printed. A developer recovery tank 16 for recovering overflowing developer, a washing tank 18 for washing the developer adhering to the PS plate 12 with water, and a desensitizing treatment tank 20 for applying a degreasing treatment liquid to the PS plate 12. are provided.

As shown in FIG. 1, a pair of transport rollers 22 are arranged on the side where the PS plate 12 is inserted into the developer tank 14. A PS plate 12 on which an image has been printed by a printing device (not shown) is inserted between the pair of transport rollers 22 .

The developer tank 14 has an approximately inverted mountain shape with an open top and a bottom central portion protruding downward. The developing tank 14 contains a developing solution. Inside the developer tank 14, guide rollers 24, 26, 28, 3 of the same diameter are installed along the bottom wall.
4.36.38.40 are arranged. These guide rollers 24 to 40 form skewer-shaped rollers in which a plurality of elastic rotating members are supported by shafts, and the shafts thereof are supported by being spanned between a pair of side plates (not shown).

Further, a guide roller 42 having a larger diameter than the guide roller 24 is arranged above the guide roller 24, and a guide roller 44 is arranged above the guide roller 38.
A guide roller 46 is arranged above 0. These guide rollers 42, 44, 46 are the guide rollers 24
- Like the guide roller 40, it is a skewer-shaped roller and is supported by a pair of side plates (not shown).

A pair of transport rollers (pair of rollers) 48 are arranged between the guide roller 28 and the guide roller 34 in the center of the developer tank 14 . Like the guide rollers 24 to 46, the pair of conveyance rollers 48 are rotatably supported by the side plates, and are rotated by the driving force of a driving means (not shown) transmitted thereto.

A guide roller 32 is arranged between the conveyance roller 4 and the guide roller 34. 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 54 with a discharge port opened between the elastic rotating members along the axial direction. That is, the guide roller 32 is a skewer-shaped roller that also serves as a spray pipe.

A guide roller 30 is arranged between the guide roller 28 and the pair of conveyance rollers 48, and this
．． It is formed to have a larger diameter than 26.28.32.36.38.40. This guide roller 30 is a skewer-shaped roller and is supported by a pair of side plates like the guide rollers 24 to 46. A guide 52 is attached to the shaft of the guide roller 30 via a bracket 50. This guide 5
2 is disposed toward a pair of conveyance rollers 48 . Therefore, the large-diameter guide roller 30 guides the tip of the 23rd plate 12 without deviating from the predetermined conveyance path, and the guide 52 reliably guides the tip of the 23rd plate 12 between the pair of conveyance rollers 48. ing.

Therefore, the developing tank 1 is conveyed by a pair of conveying rollers 22.
The 23rd plate 12 inserted into the plate 4 is conveyed diagonally through between the guide rollers 24 and 42, and is guided by the guide rollers 26, 28, 30 and lowered diagonally. It is inserted between the rollers 48.

After passing between the pair of conveyance rollers 48, the guide roller 32.
34, 36, 38, and 40 and rises obliquely, and is guided by guide rollers 46 and sent above the developer recovery tank 16. As a result, 23rd edition 12
is immersed in a developer in a developer tank I4 to be developed.

A bent part bent toward the outside of the developing tank 14 is formed on the downstream side wall of the developing tank 14 in the transport direction of the PS plate 12, and the height of this bent part is equal to the height of the upstream side in the transport direction of the 23rd plate 12. It is lower than the side wall.

Therefore, if the developer tank 14 is filled with developer and overflows,
The liquid overflows the bent portion and is always collected into the developer recovery tank 1.6.

A spray pipe 54 , which is a roller shaft of the guide roller 32 and has a plurality of discharge ports formed along the axial direction, is communicated with one end of a conduit 56 . The other end of the conduit 56 penetrates the bottom of the developer tank 14 and opens into the developer tank 14 . A circulation pump 58 is disposed in the middle of the pipe line 56, which allows the developer in the developer tank 14 to flow into the spray pipe 54.
It is designed to be supplied to

Further, a spray pipe 60 is arranged above the guide roller 32. This spray pipe 60 is provided with a plurality of discharge ports opened along the axial direction. This spray pipe 6o is also communicated with the f path 56, and the developer in the developer tank 14 is supplied by the operation of the circulation pump 58.

The discharge ports of the spray pipe 54 and the spray 60 are opened toward between the pair of transport rollers 48, and the developer supplied by the circulation pump 58 is discharged in this direction.

Further, above the developer tank 14, one end of a pipe line 64 communicating with the developer replenishment tank 627 is opened.

A replenisher pump 66 is disposed in the middle of this conduit 64. Further, one end of a pipe 70 communicating with a water supply tank 68 is opened above the developer tank 14.
A water supply pump 72 is disposed in the middle of 0. Thereby, the developer replenisher (undiluted solution) in the developer replenishment tank 62 and the water in the water supply tank 68 are supplied to the developer tank 14 at a predetermined ratio.

Further, one end of the conduit 74 is open above the developer tank I4. The other end of the pipe 74 penetrates the bottom of the developer recovery tank 16 and opens into the developer recovery tank 16 . Further, a pump 76 is arranged in the middle of the pipe line 74. As a result, the developer that overflows into the developer recovery tank 16 and is collected is returned to the developer tank 14.

Further, one end of a drain pipe 78 is opened at the bottom of the developer tank 14, and the other end is opened to a drain tank 80. A valve 82 is disposed in the middle of this drain pipe 78. By opening the valve 82, the developer in the developer tank 14 is discharged into the drain tank 80. Further, one end of a drain pipe 84 is opened at the bottom of the developer recovery tank 16, and the other end is opened to the drain tank 80. A valve 86 is disposed in the middle of this drain pipe 84. Therefore, when the valve 86 is opened, the developer in the developer recovery tank 16 is discharged into the drain tank 80.

These circulation pump 58, replenisher pump 66, water supply pump 72, and pump 76 are connected to a control section 88 provided in the photosensitive planographic printing plate processing machine 10 so that their driving is controlled.

A detector 90 connected to the control section 88 is arranged on the insertion side of the pair of conveyance rollers 22. With this inspection device 90, the PSwi at the insertion port of the photosensitive planographic printing plate processing machine 10,
12 is detected, and the controller 88 calculates the area of the PS plate 12 to be inserted into the photosensitive lithographic printing plate processing machine IO by using the preset processing speed of the PS plate and the width dimension of the PS plate. It has become.

Further, a fatigue level detector 92 is disposed in the middle of the conduit 56, and measures the fatigue level of the developer by detecting the electrical conductivity of the developer. This fatigue level detector 92 is also connected to the control section 88.

Further, an interleaf sheet presence/absence detection sensor 94 is arranged on the PS plate 12 insertion side of the pair of transport rollers 22 .

This interleaving paper presence/absence detection sensor 94 is connected to the control unit 88, and when an interleaving paper is attached to the back side of the PS plate 12, the presence of this interleaving paper is transmitted to the control unit 88 by an electric signal. It has become. A contact type detection sensor or a non-contact type detection sensor can be used as the interleaving paper presence/absence detection sensor 94. As a contact type detection sensor, for example, PSwi,
12 is transported and inserted, a contactor is brought into contact with the back surface of the PS plate, and the resistance (impedance) value between the terminals is measured using a resistance measuring device. The presence of a backing paper can be detected by utilizing the fact that this resistance value is significantly different between when there is an interleaving paper and when there is no interleaving paper. There is also a non-contact type, for example, which irradiates light from a light source onto the back side of the PS plate 12, receives the reflected light with a light receiver, and detects the reflectance. good.

- a warning device 96 is connected to the force control 88; This warning device 96 is activated when the control unit 88 detects that a backing paper is attached to the back side of the PS plate 12, and issues a warning to notify the operator that a backing paper is attached. ing.

As this warning device 96, a buzzer or a warning light can be used.

Further, a heater 98 is arranged at the bottom of the developer tank 14 to heat the developer in the developer tank 14 to a predetermined temperature. Further, since the heater 98 is disposed over the entire area along the width direction of the PS plate 12, the developer in the developer tank 14 is uniformly heated at least in the width direction of the PS plate 12.

Thereby, the PS plate can be uniformly developed while being transported.

Further, the surface of the developer in the developer tank 14 is covered with a floating lid 100. This float IE100 prevents deterioration of the developer caused by the developer absorbing carbon dioxide gas in the air and neutralizing alkaline components in the developer. Since this Mloo is molded from foamed nylon, it floats on the surface of the developer in the developing tank 14, and follows the surface even when the liquid surface rises and falls.

As shown in FIG. 1, a developer recovery tank 16 and a washing tank 18
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 conveyor 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. A recovery roller 104 disposed in a developer recovery tank 16 is in contact with the lower conveyance roller 102 . As a result, it is carried out by the PS plate 12 and transferred to the pair of conveyance rollers 10.
The developer adhering to 2 is collected into a developer recovery tank 16.

Further, a metal roller 106 is disposed in contact with the upper conveyance roller 102 on the side of the washing tank 18, so that the water adhering to the conveyance roller 102 is squeezed and returned to the washing tank.

However, the same effect can be obtained by replacing the metal roller 106 with a roller made of another material, such as rubber.

A pair of upper and lower transport rollers 108 are arranged in the washing tank 18 on the downstream side of the PSwi 12 in the transport direction.

These pair of conveyance rollers 108 are also the pair of conveyance rollers 1
Like 02, it is supported by a pair of side plates (not shown),
Like the pair of conveyor rollers 102, it is rotated by the driving force of a driving means (not shown).

Therefore, the PS plate 12 sent out from the developing tank 14 is sandwiched and transported by the pair of transport rollers 102, inserted between the pair of transport rollers 10B of the washing tank 18, and sent to the desensitization treatment tank 20. ing.

A guide roller 112 is arranged between the pair of transport rollers 102 and the pair of transport rollers 108, and a spray pipe 114 is arranged above it. The spray pipe 114 is formed of a hollow pipe like the spray pipe 60, and this pipe has a plurality of discharge ports opening along the axial direction. The guide roller 112, like the guide roller 32, is a skewer-shaped roller that also serves as a spray pipe, with a plurality of rollers constituting an elastic rotating member attached to the outer periphery of the spray pipe. At the bottom of the washing tank 18 is a pipe line 1.
One end of 10 is open, and the other end communicates with a guide roller 112 that also serves as a spray pipe and a spray pipe 114. A circulation pump 116 is disposed in the middle of the pipe 110, and the washing water in the washing tank 18 is transferred to the guide roller 1.
12, the PS plate 12 is washed with water by being supplied to the spray pipe 114. Also, the lower conveyance roller 102
A collection roller 118 is disposed in contact with.

Thereby, the washing water adhering to the pair of transport rollers 102 is collected into the washing tank 18.

Further, one end of a pipe line 120 communicating with the water supply tank 68 is open at the upper part of the washing tank 18, and a water supply pump 122 is disposed in the middle of this pipe line 120. Therefore, the flush water in the water supply tank 68 is supplied into the flush tank 18 by the operation of the water supply pump 122.

Further, one end of a drain pipe 124 is open at the bottom of the washing tank 18, and the other end communicates with a drain tank 126. A valve 12B is disposed in the middle of this drain pipe 124. When the valve 128 is opened, the washing water in the washing tank 18 is discharged into the drain tank 126.

These circulation pump 116 and water supply pump 122 are connected to a control section 88 so that their operations are controlled.

A pair of conveyance rollers 130 are disposed in the upper part of the desensitization treatment tank 20 which is disposed on the downstream side of the washing tank 18 in the conveyance direction of the PS plate 12.
is located. The pair of conveyance rollers 130 are spanned between a pair of side plates (not shown) and are rotatably supported. A driving force from a driving means (not shown) is transmitted to the pair of conveying rollers 130 to rotate them. A pair of conveyance rollers 10 are provided between the pair of conveyance rollers 130.
The PS version 12 sent out from version 8 is now inserted.

A spray pipe 114 and a guide roller 134 similar to the spray pipe 114 and guide roller 112 arranged in the washing tank 18 are installed between the pair of transport rollers 130 and the pair of transport rollers 108 in the upper part of the fat-free treatment tank 20. is located. These spray pipe 132 and guide roller 134 are communicated with one end of a conduit 136. The other end of the pipe line 136 penetrates the bottom of the fat-unfatting treatment tank 20 and projects into the fat-unfatting treatment tank 20 . A circulation pump 138 is disposed in the middle of the pipe line 13G, and the operation of this circulation pump 138 causes the desensitization treatment liquid in the desensitization treatment tank 20 to flow through the spray pipe 132 and the guide roller 1.
34.

Further, one end of a pipe line 144 is open to the desensitizing treatment tank 20, and the other end of the pipe line 144 communicates with the inside of the desensitizing treatment liquid replenishment tank 146. A replenisher pump 148 is disposed in the middle of the pipe line 144, and this replenisher pump 14
By the operation of 8, the non-fat processing liquid in the non-fat processing liquid replenishment tank 146 is supplied into the non-fat processing tank 20.

Further, one end of a conduit 140 is open to the desensitization treatment tank 20, and the other end of the conduit 140 communicates with the inside of the water supply tank 68. A water supply pump 142 is arranged in the middle of the pipe line 140, and when the water pump 142 is operated, water is supplied to the non-fatty fat processing tank 2.
0.

Further, one end of a drain pipe 150 is opened at the bottom of the desensitization treatment tank 20. The other end of this pipe line 150 communicates with a drain tank 152. A valve 154 is disposed in the middle of the drain tank 152. By opening this valve 154, the desensitizing treatment liquid in the desensitizing treatment tank 20 is discharged into the drain tank 152.

Circulation pump 138, replenisher pump 14B, water supply pump 1
42 is connected to a control section 88 so that its operation is controlled.

Next, the operation of this embodiment will be explained.

The 28 plate 12, on which an image has been printed by a printing device (not shown), is inserted into a pair of conveyance rollers 22 of a photosensitive planographic printing plate processing machine.

At this time, the detector 94 detects whether or not interleaving paper is attached to the back surface of the 28-plate 12. If the mount is attached, the conveyance of the 28 plate 12 is stopped and a warning is issued by the warning device 96.

If no mount is attached, the 28-plate 12 is sent out from a pair of conveying rollers 22 and then guided by guide rollers 42 and 24 into the developer tank 14. The 28 plate 12 sent into the developer tank 14 is guided by guide rollers 26 and 28 and descends to reach the guide roller 30. The conveyance path along which the No. 28 plate 12 is conveyed within the developer tank 14 has a downwardly protruding shape, and is guided by guide rollers 26.2.
8, the curvature of the conveyance path is small and a gentle curve, but the curvature of the conveyance path gradually increases near the guide roller 30. Therefore, when the tip of the PS plate reaches the guide roller 30, the angle between the PS plate and the tangent to the guide roller 30 becomes significantly larger when the tip touches the outer periphery of the PS plate. However, since the roller diameter of the guide roller 30 is large, P
When the tip of the S plate contacts the outer periphery of the guide roller 30, most of the impact force is directed in the tangential direction of the guide roller 30, and becomes a force that rotates the guide roller 30.

Therefore, the PS plate is smoothly transported to the center of the developer tank 14 by the guide roller 30.

Although the curvature of the conveyance path becomes larger in the center of the developing tank 14, the leading end of the PS plate sent there is guided by the guide 52, so that it is smoothly inserted into the pair of conveyance rollers. The 28th plate 12 sent out from this pair of conveyance rollers 48 is moved to the guide roller 32.34.3.
6, 38, 40, 44, and 46, rises, and is sent out from the developer tank 14.

In this way, the 28 plate 12 is immersed in the developer in the developer tank 14, and is held between the pair of conveyance rollers 48 and squeezed, thereby being developed.

Further, the 28 plate 12 is sprayed with a developer in the developer tank 14 by a spray pipe 54, 60,
The 8th plate 12 is ensured to be developed. Further, the developer discharged by the spray pipe 54, 60 mixes with the developer in the developer tank 14, and the developer in the developer tank 14 is circulated by the circulation pump 58, passes through the pipe 56, and returns to the spray pipe 54. It is designed to be discharged from 60. Since the upper surface of the developer is covered by the lid 100, oxidation by air is prevented.

The 28 plate 12 sent out from the developer tank 14 is inserted into a pair of transport rollers 102 of the developer recovery tank 16, and is nipped and transported. Due to this nipping, the developer adhering to the PS plate 12 is squeezed out by the pair of transport rollers 102 and drained. The squeezed developer passes along the surface of the lower pair of conveyance rollers 102 and is collected into the developer collection tank 16 by the collection roller 104. The developer recovery tank 16 also collects the developer that overflows when the developer replenisher and water are replenished into the developer tank 14 by driving the replenisher pump 66 and the water supply pump 72. The developer thus collected into the developer recovery tank 16 is returned to the developer tank 14 by the pump 76 through the pipe 74 as described above.

The 23rd plate 12 sent out from the pair of conveyance rollers 102 is guided by the guide roller 112 and transferred to the pair of conveyance rollers 108.
It is transported and inserted into.

During this conveyance, the guide roller 1 touches both sides of the 23rd plate 12.
Washing water is supplied by a spray pipe 114 and a spray pipe 114 which also serves as a roller shaft. This washing water washes away the developer and precipitates that have adhered to both sides of the 23rd plate 12.

The 23rd plate 12 sent out from the pair of transport rollers 10B is guided by guide rollers 134 and inserted into the pair of transport rollers 130. Immediately before being inserted into the pair of conveyance rollers 130, the 23rd plate 12 is sprayed with a spray pipe 132 on both sides.
A desensitizing treatment liquid is applied by a spray pipe that also serves as the roller shaft of the guide roller 134. By applying this desensitization treatment liquid, the surface of the 23rd plate 12 is protected.

When a large number of PS 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 PS plate to be processed with the detector 90 and calculating it with the control section 88. However, this has the disadvantage 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 the 23 plate 12. (The larger the area of the image area, the greater the fatigue of the developer.) There is also a method of measuring the degree of fatigue by detecting the electrical conductivity of the developer using the detector 92.

However, the detector 92 also contains the dissolved precipitate of the 23rd edition 12,
Precipitates of developer components may adhere, and an abnormality may occur in the electrical conductivity detected by the detector 92. Therefore, in order to accurately detect the degree of fatigue of the developer, a normal detector 90 is used.
and detector 92 are used together. Based on this result, the controller 88 controls the replenisher pump 66 and the water supply pump 72.
The required operation time is calculated, and the replenisher pump 66 is operated to supply a replenishment amount of developer replenisher (undiluted solution) from the developer replenishment tank 62 and water from the water supply tank 68 at a constant rate according to the degree of developer fatigue. Water supply pump 72 is activated. If the value of the required replenisher amount detected by the detector 90 and calculated from the insertion area of the 23rd plate 12 is different from the value of the required replenisher amount calculated from the electrical conductivity of the developer detected by the detector 92. If the difference shows an abnormal value, a warning is issued. Alternatively, as described below, the replenishment method can be automatically or manually switched to a replenishment method based on the insertion area of the 23rd edition 12.

That is, the detector 90 detects the area of the 23 plate 12 to be inserted, and the replenisher pump 6 is activated based on this detection result.
6 and the operating time of the water supply pump 72 are calculated, and the developer replenisher is supplied in an amount corresponding to the area of the 23rd plate 12 (the replenisher pump 66 and the water supply pump 72 are operated).

[Effects of the Invention] As explained above, the present invention provides a photosensitive lithographic printing plate processing machine in which a photosensitive lithographic printing plate on which an image has been printed is transported through a processing liquid in a processing tank and processed, at least one guide roller disposed in the processing tank to guide the photosensitive planographic printing plate; a pair of rollers disposed in the processing tank to pinch and convey the photosensitive planographic printing plate; and a pair of rollers having a diameter of the guide roller. a large-diameter guide roller that is larger in diameter than the roller and is disposed on the insertion side of the photosensitive lithographic printing plate into the pair of rollers and guides the photosensitive lithographic printing plate to the pair of rollers; Since the guide is arranged between the large-diameter guide rollers and guides the photosensitive planographic printing plate between the pair of rollers, the conveyance of the photosensitive planographic printing plate can be improved, and the photosensitive An excellent effect can be obtained in that the lithographic printing plate can be reliably inserted between the pair of rollers.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an embodiment of a photosensitive planographic printing plate processor according to the present invention. 10... Photosensitive planographic printing plate processor, 12... Photosensitive planographic printing plate (PS plate), 14... Developer tank, 16... Developer collection tank, 18... Water washing tank, 20・・・Fuwa fat treatment tank, 30...Guide roller.

Claims (1)

[Claims] (1) A photosensitive lithographic printing plate processing machine in which a photosensitive lithographic printing plate on which an image has been printed is conveyed through a processing liquid in a processing tank and processed, and the photosensitive lithographic printing plate is placed in the processing tank and the photosensitive lithographic printing plate is at least one guide roller for guiding the lithographic printing plate;
A pair of rollers arranged in the processing tank to sandwich and convey the photosensitive lithographic printing plate, and a pair of rollers having a diameter larger than the diameter of the guide roller and arranged on the side where the photosensitive lithographic printing plate is inserted into the pair of rollers. a large-diameter guide roller arranged between the pair of rollers and the large-diameter guide roller to guide the photosensitive lithographic printing plate between the pair of rollers; A photosensitive planographic printing plate processing machine characterized by being provided with a guide.