JPH0733239Y2 - Photosensitive lithographic printing plate processing liquid application device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a processing liquid application device for a photosensitive lithographic printing plate which processes a photosensitive lithographic printing plate on which an image has been printed, with a processing liquid.

[Prior Art] A photosensitive lithographic printing plate automatic developing machine develops a photosensitive lithographic printing plate on which an image is printed along a transport line with a developing solution in a developing section, and then rinses it with a rinsing solution in a rinsing section. After the treatment, a finisher such as a lithographic printing plate treatment liquid application device is applied with a finisher such as a rinse liquid or a rinse gum solution as a treatment liquid.

In this finisher coating section, the photosensitive lithographic printing plate is conveyed above the desensitizing tank containing the finisher, and the photosensitive lithographic printing plate is transferred to the photosensitive lithographic printing plate by a spray pipe arranged at least one of above and below the conveying line. The photosensitive lithographic printing plate, to which the finisher has been applied and then the finisher has been applied, is conveyed to the next processing step by a pair of nip conveyance rollers.

[Problems to be solved by the invention] However, since the photosensitive lithographic printing plate is conventionally conveyed in a substantially horizontal direction in the finisher coating section, and the finisher has a slightly high viscosity and poor fluidity, the photosensitive lithographic printing plate is sprayed by a spray pipe. There is a problem in that it is difficult to uniformly apply the finish to the upper surface of the plate, and uneven coating occurs.

The present invention has been made in view of the above facts, and an object thereof is to obtain a processing solution coating device for a photosensitive lithographic printing plate which can uniformly apply the processing solution to the photosensitive lithographic printing plate.

[Means for Solving Problems] The present invention is directed to a photosensitive lithographic printing plate processing liquid application apparatus for processing a photosensitive lithographic printing plate having an image printed thereon with a processing liquid. A pair of conveying rollers that are inclined downward with respect to the pair of conveying rollers, and a pair of conveying rollers that are provided upstream of the pair of conveying rollers in the conveying direction of the photosensitive lithographic printing plate and above the conveying path of the photosensitive lithographic printing plate. A treatment liquid supply means for supplying a treatment liquid to the upper surface of the plate, and a photosensitive lithographic printing plate below the conveying path of the photosensitive lithographic printing plate on the upstream side in the conveying direction of the photosensitive lithographic printing plate from the pair of conveying rollers. A spray pipe having a discharge port for discharging the processing liquid toward the lower surface of the photosensitive lithographic printing plate which is provided along the direction intersecting the transport direction, and the lower surface of the photosensitive lithographic printing plate transported by the pair of transport rollers. Contact It is characterized by comprising a rotary roller rotating playing pipe as a rotation axis, a.

[Operation] Accordingly, the photosensitive lithographic printing plate, to which the processing liquid is supplied on the upper surface by the processing liquid supply means, is inserted between the pair of holding and conveying rollers in a state of being inclined downward with respect to the horizontal direction. A processing liquid reservoir having a substantially triangular cross section in the transport direction is formed between the upper surface of the planographic printing plate and the upper transport roller.

In addition, the photosensitive lithographic printing plate that is conveyed while being inclined downward with respect to the horizontal direction is supported by the rotating roller from the lower surface, and processed from the spray pipe that is the rotating shaft of the rotating roller toward the lower surface of the photosensitive lithographic printing plate. Liquid is designed to be discharged.

[Advantages of the Invention] As described above, the photosensitive lithographic printing plate is conveyed from the lower surface while being supported by the rotating roller while being inclined downward with respect to the horizontal direction by the pair of conveying rollers, so that the processing liquid pool is subjected to the photosensitive lithographic printing. Since it is reliably formed on the upper surface of the plate, it is possible to apply the processing liquid evenly to the upper surface of the photosensitive lithographic printing plate, and a rotating roller that supports the photosensitive lithographic printing plate from the lower surface and a spray pipe that applies the processing liquid to the lower surface. Since the and are integrated, it has an excellent effect that it is possible to install these rotary rollers and the spray pipe in a small space.

[Embodiment] FIG. 1 shows a photosensitive lithographic printing plate automatic developing machine 10 according to the present invention.
Examples of are shown.

The photosensitive lithographic printing plate automatic developing machine 10 includes a developing tank 14 for developing a photosensitive lithographic printing plate (hereinafter referred to as PS plate) 12 on which an image is printed by a printing device (not shown), and this developing tank 14
Developer collecting tank 16 for collecting the developer that has overflowed from, and 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 finisher, which is a treatment liquid, to the PS plate 12.

As shown in FIG. 1, a pair of transport rollers 22 are arranged on the side of the PS plate 12 to be inserted into the developing tank 14. The PS roller 12 is transferred from the printing device (not shown) to the developing tank 14 by the transport roller 22.
It is designed to be transported inside.

The developing tank 14 has a substantially inverted mountain shape in which the upper part is opened and the central part of the bottom part is projected downward. A developing solution 24 is contained in the developing tank 14. In the developing tank 14, guide rollers 26, 28, 30, 32, 34, 36, 38 are provided along the bottom wall.
Are arranged. These guide rollers 26 to 38 are hung between a pair of side plates (not shown) and rotatably supported. A skewer roller 40 having a guide function and a spray function is arranged between the guide rollers 34 and 36.
As shown in FIG. 2, in this skewered roller 40, a guide roller 41C is rotatably supported on the outer circumference of a spray pipe 41B having a plurality of discharge ports 41A provided at predetermined intervals along the axial direction. It is configured. Therefore, the skewered roller 40 discharges the developing solution from the discharge port 41A and guides the PS plate 12 by the guide roller 41C. A guide roller 42 is arranged above the guide roller 26 near the transport roller 22. Further, a guide roller 44 is provided above the guide rollers 28 and 30, a guide roller 46 is provided above the guide rollers 32 and 34, and a space between the skewer rollers 40 and the guide rollers 36 is provided. A guide roller 48 is disposed above the guide roller 38, and a guide roller 50 is disposed above the guide roller 38.
Like 26 to 38, it is supported by a pair of side plates (not shown).

A guide roller 34 and a skew roller 40 are provided in the center of the developing tank 14.
And a pair of conveyance rollers 52 are arranged between them. The carrying roller 52 is supported by the side plate like the guide rollers 26 to 38, and is rotated by transmitting the driving force of the driving means (not shown).

Therefore, the LS plate 12 sandwiched and conveyed by the conveying roller 22 and inserted into the developing tank 14 passes between the guide roller 42 and the guide roller 26 and is guided between the guide roller 44 and the guide rollers 28, 30. , Is obliquely lowered through the space between the guide roller 46 and the guide rollers 32, 34, and is inserted between the conveyance rollers 52,
After passing the transport roller 52, the skewer roller 40 and the guide roller 4
Guided by 8, 36, 38, it rises diagonally and guide roller 50
And is sent out above the developer recovery tank 16. In this way, the PS plate 12 is the developer in the developing tank 14.
It is soaked in 24 and developed.

A bending portion that is bent toward the outside of the developing tank 14 is formed on the side wall on the downstream side of the developing tank 14 in the conveying direction of the PS plate 12, and the vertical height of this bending portion is the conveying direction of the PS plate 12. It is lower than the upstream side wall. Therefore, the developer in the developing tank 14
Whenever 24 overflows, the developer recovery tank 16
It is supposed to be collected.

One end of a pipeline 54 communicates with the bottom of the developing tank 14. A circulation pump 56 is arranged in the middle of the pipe 54, and the other end communicates with the skewer roller 40 and the spray pipe 58 arranged in the developer 24 in the developing tank 14. As a result, the developing solution 24 in the developing tank 14 is circulated while being sprayed, so that more effective stirring is performed.

Further, one end of the pipeline 60 is opened at the bottom of the developer recovery tank 16, and the other end is opened above the developer tank 14 via a pump 62 in the middle. As a result, the developer collected by overflowing into the developer collecting tank 16 is returned into the developing tank 14.

In addition, a pipeline communicating with the developer replenishing tank 64 is connected to the developing tank 14.
66 is open. A replenisher pump 68 is arranged in the middle of the pipeline 66. Further, a water tank for the developing tank 14.
A pipe 67 communicating with 65 is opened, and a water supply pump 69 is arranged in the middle of the pipe 67. As a result, the developer replenisher (stock solution) in the developer replenisher tank 64 and the water supply tank
The water in 65 is supplied to the developing tank 14 at a predetermined ratio.

Further, drain lines 55, 61 are provided at the bottoms of the developing tank 12 and the replenishing tank 14.
Is opened and further communicates with the drainage tank 57, and valves 55A and 61A are arranged in the middle of the drainage pipes 55 and 61.

The pump 62, the replenishing liquid pump 68, and the circulation pump 56 are connected to a control unit 70 provided in the photosensitive lithographic printing plate automatic developing machine 10 to control the driving.

Further, a detector 72 is arranged on the insertion side of the transport roller 22 and is inserted into the photosensitive lithographic processing machine 10 by detecting the insertion state of the PS plate 12 into the photosensitive lithographic printing plate automatic developing machine 10. The area of the PS version 12 is detected. The detector 72 is connected to the control unit 70.

Further, a fatigue detector 74 is arranged in the middle of the pipeline 54, and the fatigue of the developer is measured by detecting the electric conductivity of the developer. This fatigue detector
74 is also connected to the control unit 70.

As shown in FIG. 1, a pair of upper and lower conveying rollers 76 are arranged on the upper side wall of the developer collecting tank 16 and the washing tank 18 which are adjacent to each other. These transport rollers 76 are supported by a pair of side plates (not shown), and are rotated by transmitting the driving force of a driving means (not shown). Lower transport roller 76
A recovery roller 78 disposed in the developer recovery tank 16 is in contact with the. As a result, the developer 24 carried out by the PS plate 12 and attached to the transport roller 76 is collected in the developer collecting tank 16.

In the water washing tank 18, a pair of upper and lower transport rollers 82 are arranged on the downstream side in the transport direction of the PS plate 12. Like the transport roller 76, these transport rollers 82 are also supported by a pair of side plates (not shown), and are driven in the same manner as them.

Therefore, the PS plate 12 sent out from the developing tank 14 is nipped and conveyed by the conveying roller 76 and inserted between the conveying roller pair 82,
It is designed to be sent to the desensitizing tank 20.
As shown in FIG. 3, since the straight line passing between the axes of the conveying rollers 82 is inclined at a predetermined angle of 5 ° to 10 ° with respect to the vertical line, the PS plate 12 is conveyed by the conveying rollers 82. Is sent downwards by a predetermined angle.

One end of a pipe line 88 is opened at the bottom of the washing tank 18, and the other end thereof has skewer rollers 84 and 86 similar to the skewer roller 40 described above arranged between the transport roller 76 and the transport roller 82. It is in communication with. Further, a pump 90 is arranged in the middle of the pipe line 88, and supplies the washing water in the washing tank 18 to the skewer rollers 84, 86.
The PS version 12 is designed to be washed with water. A collecting roller 80 is in contact with the lower transport roller 76. As a result, the washing water adhered to the lower conveyance roller 76 will not be washed by the washing tank 18.
It is supposed to be collected at.

Further, a pipe 89 communicating with the water supply tank 65 is opened at the bottom of the washing tank 18, and a water supply pump 91 is arranged in the middle of the pipe 89. Further, a drainage pipe 89A is opened at the bottom of the washing tank 18 and communicates with a drainage tank 89B. A valve 89C is arranged in the middle of the drainage pipe 89A.

The PS plate 12 carried out from the carrying roller 82 at the above-mentioned predetermined angle is carried in the desensitizing processing tank 20 which constitutes the processing liquid coating device for the photosensitive lithographic printing plate while maintaining the angle. .

That is, as shown in FIG. 3, along the conveyance path of the PS plate 12, there is a finisher discharge pipe 98 above it, and below the finisher path is a finisher discharge skewer roller 99. It is supported by being stretched between a pair of side plates. Further, a pair of upper and lower conveying rollers 92 for sandwiching the PS plate 12 and conveying it to a drying device (not shown) are provided on the side plates downstream of the conveying path.

The finisher ejection pipe 98 and the finisher ejection skewer roller 99 are provided with a plurality of ejection openings along the axial direction.

That is, like the skewer roller 40, the finisher skewer roller 99 is provided with a plurality of discharge openings (not shown) for discharging the finisher to the lower surface of the PS plate 12 at predetermined intervals along the axial direction. The spray pipe 100B is arranged so as to extend along a direction intersecting with the transport direction of 12, and a guide roller 100C which is a rotating roller rotatably supported with the spray pipe 100B as a rotation axis. And this guide roller 100C is PS
The PS plate 12 is supported by contacting the lower surface of the plate 12.

On the other hand, a circulation pump 134 is connected to the finisher discharge pipe 98 and the finisher skewer roller 99 through a pipe line 102, and the finisher in the desensitizing tank 20 is connected to the finisher discharge pipe by the circulation pump 134. 98 and a skewer roller 99 for discharging the finisher.

The guide roller 100C of the finisher discharge roller 99 is PS
The PS plate 12 is inserted between the transport rollers 92 while preventing the plate 12 from curling downward (forward curl) due to its own property or its own weight or the weight change due to the finisher application and maintaining the above-mentioned predetermined angle. To guide you.

Therefore, the finisher discharged from the finisher discharge pipe 98 to the upper surface of the PS plate 12 is moved by the movement of the PS plate 12 in the direction of the transport roller 92, the inclination of the predetermined angle, and the viscosity of the PS plate 12 to the upper surface of the PS plate 12. A fin reservoir having a substantially triangular cross section in the transport direction is formed between the upper transport roller 92 and the upper transport roller 92. As a result, the finisher is uniformly applied over the entire upper surface of the PS plate 12.

In the above example, an ordinary spray pipe is used above the PS plate 12 for discharging the finisher.
Depending on the nature of the plate 12, it may curl upward (reverse curl), and in order to prevent the reverse curl, a skewer roller similar to the finisher discharging skewer roller 99 may be used.

A pipe 103 communicating with the replenisher tank 135 is opened at the bottom of the desensitizing tank 20, and a replenisher pump 135A is arranged in the middle of the pipe 103. Further, a pipe 93 communicating with the water supply tank 65 is opened at the bottom of the desensitizing tank 20, and a water supply pump 93A is provided in the middle of the pipe 93.
Are arranged. As a result, the finisher (stock solution) in the finisher replenishing tank 135 and the water in the water supply tank 65 are supplied into the desensitizing tank 20 at a constant ratio.

Next, the operation of this embodiment will be described.

PS that is nipped and conveyed by the conveyance rollers 22 into the developing tank 14.
The plate 12 is guided by the guide rollers 42 and 26 and fed.
The PS plate 12 fed into the developing tank 14 has guide rollers 44, 2
It is guided by 8, 30, 46, 32 and 34 and descends to be fed to the central portion of the developing tank 14 and inserted into the conveying roller 52. Conveyor roller
The PS plate 12 nipped and conveyed by the 52 is guided by the skewer roller 40 and the guide rollers 48, 36, 38, and 50 to move up to the developing tank 14
Sent out from within.

Thus, the PS plate 12 is immersed in the developing solution 24 in the developing tank 14 for development processing.

The developing solution 24 in the developing tank 14 is circulated to the developing tank 14 by a circulation pump 56 via a pipe 54.

The PS plate 12 sent out from inside the developing tank 14 is inserted into the carrying roller 76, and is nipped and carried. By this sandwiching, the developer 24 attached to the PS plate 12 is squeezed out by the transport roller 76 and is drained. The squeezed developer 24 travels along the surface of the lower transport roller 76 and is collected by the collecting roller 78 into the developer collecting tank 16. The developer 24 thus collected in the developer collecting tank 16 is pumped through the conduit 60 as described above.
By 62, it is returned to the inside of the developing tank 14.

The PS plate 12 carried into the washing tank 18 by the carrying roller 76 is inserted into the carrying roller 82 guided by the skewer rollers 84 and 86, and is nipped. At this time, the wash water from the skewer rollers 84, 86
It is discharged onto the PS plate 12. As a result, the developer 24 attached to the surface of the PS plate 12 is removed. After washing with water, the washing water is collected in the washing tank 18. The washing water in the washing tank 18 is supplied to the skewered rollers 84, 86 by a pump 90 via a pipe line 88.

The PS plate 12 delivered from the transport roller 82 is guided by the guide roller 100C of the finisher ejection skewer roller 99 and inserted between the transport rollers 92. In the middle of this transportation, the finisher PS is discharged from the finisher discharge pipe 98 and the sprayer 100B of the finisher discharge skewer roller 99.
It is ejected onto the surface of the plate 12. The finisher discharged and applied to the PS plate 12 flows along the surface of the PS plate 12 toward the conveying roller 92 side, and at the same time, the triangular finisher pool is formed between the PS plate 12 and the upper conveying roller 92 by the finisher. Therefore, a uniform finish is applied to the surface of the PS plate 12. Excessive fins are collected in the desensitizing tank 20.

The PS plate 12 sent from the carrying roller 92 is sent to a drying device (not shown).

In this way, the PS plate 12 is developed in the developing tank 14 and washed with water 18.
In this case, the washing treatment is carried out, and the finisher coating is carried out in the desensitizing tank 20.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a photosensitive lithographic printing plate automatic developing machine to which the present invention is applied, FIG. 2 is an irradiation diagram of a skewer roller, and FIG. 3 is a photosensitive lithographic printing plate processing liquid coating device. FIG. 10 ... Photosensitive lithographic printing plate automatic developing machine, 20 ... Desensitizing tank, 76, 82, 92 ... Conveying roller, 84, 86 ... Skew roller, 98 ... Finisher discharge pipe (processing liquid supply) Means), 99 ... A skewer roller for discharging a finisher.

Claims (1)

[Scope of utility model registration request] 1. A processing solution coating device for a photosensitive lithographic printing plate, which processes a photosensitive lithographic printing plate on which an image has been printed, with a processing solution. The photosensitive lithographic printing plate is conveyed while being inclined downward with respect to the horizontal direction. A pair of transport rollers, and a processing liquid is provided on the upper side of the photosensitive lithographic printing plate transport path upstream of the pair of transport rollers in the transport direction of the photosensitive lithographic printing plate. Provided along the direction intersecting the conveying direction of the photosensitive lithographic printing plate on the upstream side of the conveying direction of the photosensitive lithographic printing plate from the pair of conveying rollers and below the conveying path of the photosensitive lithographic printing plate. And a spray pipe having a discharge port for discharging the processing liquid toward the lower surface of the photosensitive lithographic printing plate, and contacting the lower surface of the photosensitive lithographic printing plate conveyed by the pair of conveying rollers, and rotating the spray pipe as a rotating shaft. A photosensitive liquid lithographic printing plate treatment liquid application apparatus comprising: a rotating roller that rolls.