JPH021865A - Device for processing photosensitive lithographic printing plate - Google Patents

Abstract

PURPOSE:To prevent the trouble of a processing tank, the defective processing of a printing plate, etc., by detecting whether interleaving paper is stuck to photosensitive lithographic printing plates or not and generating an alarm when the sticking of the paper is detected at the time of stripping said printing plates which are superposed on each other via the interleaving paper for protection by each sheet and inserting the plates into a processing device. CONSTITUTION:Whether the interleaving paper sticks to the plate surface is detected by a detector 94 at the time of inserting the PS plate 12 on which images are printed to a pair of transporting rollers 22. A contact type detecting sensor is used for the detector 94 and the two terminals of a contactor 158 is brought into contact with the rear surface of the PS plate 12 when the PS plate 12 passes along the sensor. The resistance value between the terminals is then measured and whether the rear surface of the PS plate 12 is a metal or interleaving paper is detected. The transportation of the PS plate 12 is stopped and the alarm is outputted simultaneously from an alarm device 96 when the sticking of the interleaving paper is decided. An operator, therefore, removes the interleaving paper held stuck to the PS plate 12 and continues the operation.

Description

[Detailed Description of the Invention] [Industrial Application Field] Photosensitive lithographic printing in which photosensitive lithographic printing plates are taken out one by one from a stacked state with a protective interleaving paper interposed between them, images are printed on them, and then transported and processed. Related to plate processing equipment.

[Prior Art] Photosensitive lithographic printing plates are generally packaged in a state in which a plurality of plates are stacked on top of each other with interleaf paper interposed therebetween. This protects the surface of the photosensitive lithographic printing plate.

From this state, the photosensitive lithographic printing plates are taken out one by one while removing the interleaving paper, and the image is printed in a printing device, after which they are sent to a photosensitive lithographic printing plate processing device, where they are developed in a developing tank and washed with water in a washing tank. It is then subjected to a desensitization treatment in a desensitization treatment tank.

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

[Problems to be Solved by the Invention] However, when printing an image onto a photosensitive lithographic printing plate, the interleaf paper may not be removed and the image may be printed with the interleaf paper attached to the plate surface of the photosensitive lithographic printing plate. Furthermore, when stored for some time after printing, the photosensitive lithographic printing plates may be stacked again with interleaf paper in between.

If the photosensitive planographic printing plate is then mistakenly inserted into the photosensitive planographic printing plate processing apparatus with the interleaving paper attached, various problems will occur in the photosensitive planographic printing plate processing apparatus. For example, if you try to transport a photosensitive lithographic printing plate with interleaving paper attached, the transport roller may slip and cause a transport failure, or the interleaving paper that has peeled off from the photosensitive lithographic printing plate may wrap around the transport roller, causing the transport roller to malfunction. wake up. Furthermore, if the interleaf paper gets mixed into the processing solution, it may clog the filter or spray. Furthermore, various problems arise, such as, for example, in the developer tank, the interleaving paper dissolves in the developer, reducing the developing ability.

In consideration of the above facts, the present invention detects whether or not interleaving paper is attached to the plate surface of a photosensitive planographic printing plate before the photosensitive planographic printing plate is processed, and transfers the plate to a photosensitive planographic printing plate processing apparatus. The object is to obtain a photosensitive lithographic printing plate processing device that can prevent paper from entering.

[Means for Solving the Problems] The present invention uses a photosensitive lithographic printing plate processing apparatus that processes photosensitive lithographic printing plates on which images are printed and taken out one by one from a stacked state with a protective interleaving paper interposed therebetween. and whether an interleaving paper is attached to at least one surface or back surface of the photosensitive planographic printing plate before the photosensitive planographic printing plate is inserted into the photosensitive planographic printing plate processing apparatus and processed. and a warning means for issuing a warning when the interleaving sheet is detected by the interleaving sheet detecting means and/or a stopping means for stopping the conveyance of the photosensitive planographic printing plate. It is characterized by

More preferably, the apparatus is characterized by providing the warning means, the conveyance stop means, and means for releasing the nip of the drive roller in order to facilitate the work of removing the photosensitive planographic printing plate or interleaf paper.

Furthermore, the means of the present invention is most preferably used in a development processing apparatus for photosensitive lithographic printing plates, including a gum coater for desensitizing processing, a water washer for washing with water, a conveyance type burning processor dryer, and a PI plater. It can also be applied to a so-called re-entry type gum coater, etc., which cannot be inserted again from the processing section in the middle of the machine or development processing device.

[Function] In the present invention having the above configuration, the interleaving paper detection means detects whether or not interleaving paper is attached to the plate surface of the photosensitive planographic printing plate at the insertion opening of the photosensitive planographic printing plate processing apparatus.

During the normal operation in which the photosensitive planographic printing plates are taken out one by one while removing the interleaving paper and printed, the photosensitive planographic printing plates without the interleaving paper are sequentially processed by the photosensitive planographic printing plate processing device without being delayed. It is transported and inserted into the machine and processed.

However, if the interleaving paper is not removed by mistake and the photosensitive lithographic printing plate is fed together with the interleaving paper and reaches the insertion slot of the photosensitive lithographic printing plate processing apparatus, the warning means issues a warning. This allows the operator to know that the interleaving paper is attached to the surface of the photosensitive lithographic printing plate, and to remove this interleaving paper.

[Embodiment FIG. 1 shows a photosensitive planographic printing plate processing apparatus 10 according to the present invention.
An example is shown.

The photosensitive planographic printing plate processing apparatus 10 includes a photosensitive planographic printing plate (hereinafter referred to as rPS) on which an image is printed by a printing device (not shown).
A developer tank 14 for developing the PS plate 12, a developer recovery tank 16 for collecting the developer overflowing from the developer tank 14, 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 desensitizing treatment liquid to the PS plate 12.

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. Development (314 includes guide rollers 24, 26, 28.
34.36.38.40 are arranged. These guide rollers 24 to 40 are skewer-shaped rollers, and are spanned between a pair of side plates (not shown) and rotatably supported.

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 conveyance rollers 48 is 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 a pair of conveyance rollers 48 and a guide roller 340. 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
4 to the guide roller 40. It is formed to have a larger diameter than the guide roller 40. This guide roller 30 is a skewer-shaped roller and the guide roller 24~
46, it is supported by a pair of side plates. A guide 52 is connected to the axis of the guide roller 30 via a bracket 50.
is installed. One end of this guide 52 is arranged toward a pair of conveyance rollers 48, and is arranged so that the PS plate 12
is guided between a pair of conveyance rollers 48.

Therefore, the developing tank 1 is conveyed by a pair of conveying rollers 22.
The PS plate 12 inserted into the PS plate 12 is conveyed diagonally through between the guide rollers 24 and 42, is guided by the guide rollers 26, 28, and 30, and is lowered diagonally, and is then conveyed by a pair of guides 52. 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, PS version 12
is immersed in a developer in a developer tank 14 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 PS 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 16.

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 is a developing device F.
It penetrates the bottom of the ff 14 and opens into the developer tank 14 . A circulation pump 58 is disposed in the middle of the pipe line 56, so that the developer in the developer tank 14 is supplied to the spray pipe 54.

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 60 is also communicated with the conduit 56, and the developer in the developer tank 14 is supplied by operation of the circulation pump 58.

The discharge ports of the spray pipe 54 and the spray pipe 60 are opened toward the space 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 62 is opened. This conduit 6
A replenisher pump 66 is disposed in the middle of 4. Further, above the developer tank 14, one end of a conduit 70 communicating with a water supply tank 68 is opened, and a water supply pump 72 is disposed in the middle of this conduit 70. 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 a conduit 74 is open above the developer tank 14 . The other end of the pipe 74 penetrates the bottom of the developer recovery tank 16 and opens into the developer recovery tank ld. Further, a pump 7 is disposed in the middle of the conduit 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 1'V16.
The other end opens to the drain tank 8J. This drain pipe 8
A valve 86 is disposed in the middle of 4. valve 86
When the developer recovery tank 16 is opened, the developer in the developer recovery tank 16 is discharged into the drain tank 80.

circulation pump 58, replenisher pump 66, water supply pump 72,
The pump 76 is connected to a control section 88 provided in the photosensitive planographic printing plate processing apparatus 10, so that its driving is controlled.

Further, a detector 90 connected to the control section 88 is arranged on the insertion side of the pair of conveyance rollers 22.

The detector 90 detects the width dimension of the 23rd plate 12 and the insertion time into the photosensitive lithographic printing plate processing apparatus 10 , and the controller 88 then detects the width of the 23rd plate 12 and the insertion time into the photosensitive lithographic printing plate processing apparatus 10 . It is designed to calculate area.

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 impedance value of the developer. This fatigue level detector 92 is also connected to the control section 88.

Further, a slip sheet presence/absence detection sensor 94 is arranged on the insertion side of the pair of transport rollers 22 . This interleaving paper presence/absence detection sensor 9
4 is connected to a control unit 88, and when there are several interleaving sheets on the plate surface of the 23rd edition 12, the control unit 8 detects the presence of these interleaving sheets.
8 by means of electrical signals. 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, as shown in Fig. 2, the 23rd plate 12 is transported, and when inserted, the contactor 158 is brought into contact with the plate surface of the PS plate to measure the resistance (impedance) value between the terminals. It is measured by the instrument 156. The presence of an interleaf paper can be detected by utilizing the fact that this resistance value is significantly different between the presence and absence of an interleaf paper. In addition, as a non-contact type, for example, as shown in Fig. 3, the 23rd edition 12
There is a device that irradiates light from a light source 160 onto the back surface of the paper, receives the reflected light by a light receiver 162, and detects the intensity of this reflected light, and the presence of the interleaving paper may be detected by this.

As the type of light used, light to which the photosensitive planographic printing plate is not sensitive is preferably used. For example, infrared rays, 450n
Visible light that cuts blue light or ultraviolet rays below m is preferable.

On the other hand, a warning device 96 is connected to the control section 88 . This warning device 96 is activated when the control unit 88 detects that interleaving paper is attached to the surface of the 28-plate 12,
It is designed to issue a warning and notify the operator that interleaf paper is attached.

As this warning device 96, a buzzer, a warning light, a bell, etc. 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 and keep it warm. Since the heater 98 is installed parallel to and longer than the guide roller, the developer in the developer tank 14 can be uniformly heated at least in the width direction of the 28 plate 12.

Further, the surface of the developer in the developer tank 14 is covered with a floating lid 100. This prevents the developer from deteriorating due to air. Since the lid 100 is made of foamed nylon, it floats on the surface of the developer in the developer tank 14 and follows the surface of the developer even when the surface rises and falls. This floating lid 100 may have a structure that is fixed in a fixed position.

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 developer recovery roller 104 (disposed inside a16) is in contact with the lower conveyance roller 102. As a result, the developer is taken out by the 28 plate 12 and transferred to the pair of conveyance rollers 1.
The developer adhering to 02 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 with a roller made of another material, such as rubber.

Inside the washing tank 18, a pair of upper and lower conveyance rollers 108 are arranged on the downstream side in the conveyance direction of the 28-plate 12.

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 rapid feed rollers 102, they are rotated by the driving force of a driving means (not shown).

Therefore, the 28-plate 12 sent out from the developer tank 14 is conveyed while being held between the pair of conveyance rollers 102, inserted between the pair of conveyance rollers 108 of the washing tank 18, and sent to the desensitization processing chamber 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.

One end of a pipe line 110 is open at the bottom of the washing tank 18, and the other end communicates with a guide roller 112 that also serves as a spray pipe and a spray pipe 114. Also, the conduit 110
A circulation pump 116 is disposed in the middle of the plate 11, and supplies the washing water in the washing tank 18 to the guide roller 112 and the spray pipe 114 to wash the 28 plate 12. In addition, a collection roller 118 is attached to the lower conveyance roller 102.
are placed in contact with each other. 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 128 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 installed 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 23rd 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 23rd edition 12 sent out from 8 is inserted.

At the upper part of the desensitization treatment tank 20, between the pair of tlif2 feed rollers 130 and the pair of conveyance rollers 108, a spray pipe 132 and a guide similar to the spray pipe 114 and guide roller 112 arranged in the washing tank 18 are installed. A roller 134 is arranged.

These spray pipe 132 and guide roller 134 are communicated with -tIM of the pipe line 136. The other end of the pipe line 136 penetrates the bottom of the desensitizing tank 20 and projects into the desensitizing tank 20 to open.

A circulation pump 138 is disposed in the middle of the pipe line 136, and the operation of this circulation pump 138 causes the desensitization treatment liquid in the desensitization treatment f'W20 to flow into the spray pipe 132.
, and are supplied to the guide roller 134.

Further, one end of a pipe line 144 is open to the desensitizing liquid 20, and the other end of the pipe line 144 communicates with the desensitizing liquid replenishment tank 146. A replenisher pump 148 is disposed in the middle of the pipe line 144, and this replenisher pump 14
8 causes the desensitizing liquid in the desensitizing liquid replenishment tank 146 to be supplied into the desensitizing 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 disposed in the middle of the pipe line 140, and water is supplied to the desensitization treatment tank 20 by the operation of the water supply pump 142.

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 148, 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 23rd printing plate 12 on which an image has been printed by a printing device (not shown) is inserted into a pair of transport rollers 22 .

At this time, the detector 94 detects whether or not interleaving paper is attached to the plate surface of the 23rd plate 12. The contact type detection sensor according to this embodiment has a contactor 158 when the PS plate passes.
The two terminals contact the back side of the PS plate, and the resistance value between the terminals is measured to detect whether the back side of the PS plate is metal or paper.

If the interleaf paper is attached by this detection means, 23
The conveyance of the plate 12 is stopped, and at the same time a warning is issued by the warning device 96, and the operator is required to remove the interleaving paper attached to the back side of the 23rd plate 12. This makes it possible to prevent interleaf paper from being inserted into the developer tank 14.

If no interleaving paper is attached, the PS plate is sent out from a pair of conveyance rollers 22, guided by guide rollers 42 and guide rollers 24, and sent into the developer tank 14.

The 23rd plate 12 sent into the developer tff 14 is guided by guide rollers 26, 28, 30 and lowered to the developer tff 14.
sent to the center of

The 23rd plate 12 sent to the center of the developing F"14 is guided by the guide 5.
2 and inserted between a pair of conveyance rollers 48.

The 23rd plate 12 sent out from this pair of conveyance rollers 48
are guide rollers 32.34.36.38.40.44.
46, the developer rises, and is sent out from the developer tank 14.

By this conveyance, the 23rd plate 12 is immersed in the developer in the developer tank 14 and subjected to development processing.

Since the upper surface of the developer is covered by the lid 100, deterioration of the developer by air is prevented.

Furthermore, 23rd edition 12 is developed! The developer in the developer in the 4 is sprayed by a spray pipe 54.60, so that the 23rd plate 12 is reliably developed. The developer is mixed with the developer in the developer [14],
The developer in the tank 14 is circulated by a circulation pump 58, passes through a line 56, and is discharged again from a spray pipe 54,60.

The 23rd 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 23rd 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 transport rollers 102 and is collected by the collection roller 104 into the developer collection 1'ff16. The developer recovery tank 16 also collects developer that overflows when the developer replenisher is refilled into the developer tank 14 by driving the water supply tank 68 and the water supply pump 72. The developer collected in the developer recovery tank 16 in this manner is returned to the developer tank 14 by the pump 76 through the conduit 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 10.
It is transported and inserted into 8.

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 108 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. The surface of the 23rd plate 12 is protected by applying this desensitizing treatment liquid.

When a large number of PS plates are developed in a developer tank, the developer deteriorates or becomes fatigued. The degree of fatigue of the developer can be estimated by detecting and calculating the area of the 23 plate 12 to be processed using the detector 90. However, developer fatigue is caused by 23rd edition 1.
2, the area of the image area and the area of the non-image area vary considerably (the wider the area of the image area, the greater the fatigue of the developer). and detector 92 are used together.

The detector 92 detects the impedance value of the developer, and based on this result, the controller 88 calculates the degree of fatigue of the developer. Furthermore, the control unit 88 calculates the required operating time of the replenisher pump 66 and the water supply pump 72, and mixes the developer replenisher (undiluted solution) from the developer replenishment tank 62 and with the developer replenisher according to the degree of developer fatigue. Replenisher pump 66 and water supply pump 72 to supply water at a constant rate from water supply tank 68
is activated.

However, the detector 92 has 23 plates 12 on its electrode portion.
Dissolution precipitates, developer component precipitates, etc. may adhere to the impedance value detector 92, which may cause an abnormality in the impedance value detector. Therefore, the PS detected by the detector 90
The controller 88 can always check the difference between the required amount of replenisher calculated from the area of the plate 120 and the value calculated from the impedance value of the developer detected by the detector 92. It has become. If this difference exceeds a predetermined value and indicates an abnormal value, a warning is issued to notify the operator. In this case, the electrode portion of the detector 92 must be cleaned or replaced.

Or, if the above abnormal value is shown, as described below,
It is also possible to automatically switch to the replenishment method based on the insertion area of the 23rd edition 12.

That is, the area of the inserted PS plate 12 is detected by the detector 90, and the replenisher pump 6 is activated based on this detection result.
6 and the required operating time of the water supply pump 72 are calculated and PS version 1
A replenisher pump 66 and a water supply pump 72 are operated to supply a developer replenisher in an amount corresponding to the area of 2.

In this embodiment, as the interleaving paper detection means, a contactor having two terminals among the contact type detection sensors was used to contact the back surface of the PS plate 12. However, even with a contact type detection sensor, only one terminal is in contact with the back side of the PS plate 12, and the other terminals are connected to the PS plate 12.
It can also be brought into contact with the sides of the plate 12 or the top surface. Further, the resistance value can also be detected using a roller as a terminal of the contactor.

Further, as a non-contact type detection sensor, the presence or absence of an interleaf on the plate surface of the PS plate 12 can also be detected using a photodetection element such as a photoelectric switch.

Further, in this embodiment, the detector 94 is placed in the PSS insertion slot of the photosensitive planographic printing plate processing apparatus, but the same operation and effect can be obtained even if the detector 94 is placed in the process before the photosensitive planographic printing plate processing.

[Effects of the Invention] As explained above, the present invention provides a photosensitive lithographic printing plate processing apparatus that processes photosensitive lithographic printing plates that are taken out one by one from a stacked state with a protective interleaving paper interposed therebetween and printed with an image. and, before the photosensitive lithographic printing plate is inserted into the photosensitive lithographic printing plate processing device and processed, is an interleaving paper attached to at least one of the front and back sides of the photosensitive lithographic printing plate? An interleaf sheet detection means for detecting whether or not an interleaf sheet is detected, a warning means for issuing a warning when an interleaf sheet is detected by the interleaf sheet detection means, and/or a stop means for stopping the conveyance of the photosensitive lithographic printing plate. This feature makes it possible to detect whether or not interleaving paper is attached to the plate surface before the photosensitive planographic printing plate is processed, and to insert the interleaving paper into the photosensitive planographic printing plate processing device. There is no. Therefore, failures in the transport mechanism of the photosensitive lithographic printing plate processing device caused by incorrectly inserting interleaving paper, failures in the processing tank due to interleaving paper mixed into the processing solution, or processing of photosensitive lithographic printing plates Defective etc.
An excellent effect can be obtained in that inconveniences associated with a photosensitive planographic printing plate processing apparatus can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing an embodiment of a photosensitive planographic printing plate processing apparatus according to the present invention, and FIGS. 2 and 3 are explanatory diagrams showing an example of a sensor for detecting the presence or absence of interleaf paper. 10... Photosensitive lithographic printing plate processing≠device, 12... Photosensitive (PS plate), 14... Developing tank, 88... Control unit, 94... Interleaf paper presence detection sensor, 96. ...Warning device. Figure 2

Claims (1)

[Scope of Claims] (1) A photosensitive lithographic printing plate processing apparatus for processing photosensitive lithographic printing plates on which images are printed by taking out one sheet at a time from a stacked state with a protective interleaving paper interposed therebetween, the photosensitive lithographic printing plate processing apparatus comprising: A method for detecting whether or not interleaving paper is attached to at least one of the front and back surfaces of the photosensitive lithographic printing plate before the photosensitive lithographic printing plate is inserted into the photosensitive lithographic printing plate processing apparatus and processed. A photosensitive device comprising a paper detection means, a warning means for issuing a warning when a slip sheet is detected by the slip paper detection means, and/or a stop means for stopping the conveyance of the photosensitive planographic printing plate. lithographic printing plate processing equipment. (2) The interleaf paper detection means includes a detection means for detecting a resistance value of at least one of the front surface or the back surface of the photosensitive planographic printing plate, or a resistance value in the thickness direction from both the front surface and the back surface, and this detection means. 2. The photosensitive planographic printing plate processing apparatus according to claim 1, further comprising determining means for determining whether or not interleaving paper is attached based on the result detected by the method. (3) The interleaf paper detection means includes a light source that irradiates light onto at least one of the front and back surfaces of the photosensitive lithographic printing plate;
It is characterized by comprising a light receiving means for receiving the reflected light reflected from the photosensitive lithographic printing plate, and a determining means for judging whether or not interleaving paper is attached based on the reflected light received by the light receiving means. The photosensitive planographic printing plate processing apparatus according to claim (1).