JP2005099585A - Method and device for development of lithographic printing plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To excellently perform development by easily washing off a lithographic printing plate after exposure processing. <P>SOLUTION: The lithographic printing plate 12 for forming an image by film removal and dispersion using water or aqueous liquid after exposure is exposed and a flow of water or aqueous liquid is applied reversely to the conveying direction of the lithographic printing plate 12 to peel off a film which is not cured in the exposure processing while leaving a film cured in the exposure processing, thereby forming the image. The water or aqueous liquid which is always fresh is supplied downstream from the lithographic printing plate 12 in its conveyance direction and water or aqueous liquid including peeled and dispersed films is prevented from falling from upstream in the conveyance direction to stay or restick on the surface of a photosensitive layer, thereby excellently performing development. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a lithographic printing plate developing method and a developing apparatus, in which a lithographic printing plate subjected to exposure processing using a laser beam or the like is subjected to development processing to make a plate.

  Generally, a photosensitive lithographic printing plate (so-called PS plate) is used for offset printing. In the field of lithographic printing, a lithographic printing plate used for a CTP (Computer to Plate) system for directly making a printing plate by performing laser exposure processing based on digital data from a computer or the like has been proposed.

  Conventionally, in such a CPT system, an on-press development system has been proposed in which a lithographic printing plate is exposed and developed without being subjected to development processing, and is mounted on a printing press for printing.

  In this on-press development system, an aluminum plate having a hydrophilic surface that is anodized and roughened is used as a support and can be combined on the hydrophilic surface under the influence of heat. And forming an image forming layer comprising hydrophobic thermoplastic polymer particles dispersed in a hydrophilic binder, and adding a compound that converts light to heat in the image forming layer or a layer adjacent thereto. Use the configured lithographic printing plate.

  In this on-press development system, an exposure process for a lithographic printing plate is performed using, for example, infrared (IR) rays or laser light in the wavelength range of the near infrared region (light emitted from an LED or laser diode).

  In the exposure process for this lithographic printing plate, the laser light irradiated onto the image forming layer corresponding to the required image is converted into heat, and the hydrophobic thermoplastic polymer particles contained in the image forming layer are heated above the coagulation temperature. And solidified by heating to form a hydrophobic agglomerate in the hydrophilic layer so that it becomes insoluble in ordinary water or aqueous liquid and does not fall off and disperse.

  In this on-press development system, the lithographic printing plate thus exposed is placed on, for example, a printing cylinder of the printing press, and then the printing press is started to set the lithographic printing plate on the image forming layer of the lithographic printing plate. An image forming layer of a lithographic printing plate is obtained by rolling a dampening agent roller that supplies an aqueous fountain solution onto the image forming layer and then rolling an ink roller on the image forming layer of the lithographic printing plate to perform a printing operation. Development is carried out by removing and dispersing the other hydrophilic layer portions in ordinary water or aqueous liquid, leaving the coagulated (cured) hydrophobic agglomerates. Normally, after the rotation of the printing cylinder about 10 times, the first clean and useful printing is obtained (for example, see Patent Document 1).

  Further, in a lithographic printing plate that can be developed on a conventional printing press (lithographic printing plate that forms an image by defilming and dispersing with water or fountain solution after exposure), a photosensitive layer provided on the support of the lithographic printing plate In addition, a microcapsule containing at least an ethylenically unsaturated compound and a photopolymerization initiator as an active substance is present, and an active substance diffused from the microcapsule exists on and near the surface of the microcapsule, so that the photosensitive layer is active. When exposed to light, the film of the photosensitive layer is cured to form a continuous strong film, and the unexposed film is washed off with water or an aqueous liquid (the unexposed film is washed with water or an aqueous liquid). A material that can be removed by film removal and dispersion has been proposed.

  In this lithographic printing plate, a developing method in which water is washed off with a brush, mop, sponge or the like, or a conventional offset printing press mounted directly on a printing press directly with a water rod roll or an ink roll. It has been proposed to perform development processing by a developing method that removes the photosensitive layer in the exposed portion (see, for example, Patent Document 2).

  In the case of developing a conventional lithographic printing plate on a printing machine as described above, the development process is performed continuously on the same printing machine immediately after the printing process is performed on the printing machine. Appropriate printed matter will be printed.

  For this reason, the lithographic printing plate before printing on which a latent image has been formed by exposure is not developed and cannot be visually recognized. Therefore, the non-image portion (unexposed portion) is washed on a printing press. It is impossible to confirm (inspect) whether or not the image to be recorded on the planographic printing plate is correctly recorded until printing is performed simultaneously with development by turning off and removing.

In the case where a conventional lithographic printing plate is developed on a printing press, the fountain solution of the printing press is used when the fountain solution is supplied to the image forming surface of the lithographic printing plate with a water stick and washed off. There is a problem in that the peeled film is mixed in, and the peeled film is mixed and the contaminated water returns to the plate again, so that the printed material is contaminated by the peeled film.
Japanese Patent No. 2938397 Japanese Patent No. 2639748

  The present invention newly provides a developing method and a developing apparatus for a lithographic printing plate that can easily wash off the lithographic printing plate that has been exposed to light before the lithographic printing plate is loaded into a printing machine. With the goal.

  The lithographic printing plate development method according to claim 1 of the present invention is a lithographic printing plate development method in which film formation is dispersed and dispersed with water or an aqueous liquid to form an image after exposure, and the exposed lithographic printing plate is conveyed. And a water supply step of applying water or an aqueous liquid to the photosensitive layer of the lithographic printing plate conveyed by the conveying means in the direction opposite to the conveying direction to peel off the unexposed or exposed photosensitive layer. It is characterized by having.

  By using the development method as described above, fresh water or an aqueous liquid is always supplied to the downstream side in the transport direction on the surface of the photosensitive layer of the planographic printing plate, and water containing a peeled and dispersed film is contained. Alternatively, since the aqueous liquid flows down from the upstream side of the conveyance, the water or the aqueous liquid containing the peeled and dispersed film does not remain on the surface of the photosensitive layer on the downstream side in the conveyance direction, and the peeled and dispersed film becomes a planographic printing plate. Re-adhering to the film is prevented and good development can be performed.

  The lithographic printing plate developing device according to claim 2 of the present invention is a lithographic printing plate developing device which forms an image by defilming and dispersing with water or an aqueous liquid after exposure, and sandwiches the exposed lithographic printing plate. Water in which a jetting position is set between the transport means having two pairs of nip rollers to be transported and the two sets of nip rollers, and pressure is applied to the photosensitive layer of the lithographic printing plate to be transported in a direction opposite to the transport direction. Or a water supply means for spraying and applying an aqueous liquid from a spray nozzle to peel off the unexposed or exposed photosensitive layer.

  By configuring as described above, fresh water or aqueous liquid is always supplied to the downstream side in the transport direction on the surface of the photosensitive layer of the lithographic printing plate, and at the same time, water or aqueous containing a film dispersed and dispersed is used. Since the liquid flows down from the upstream side of the transport, the water or aqueous liquid containing the peeled and dispersed film does not remain on the surface of the photosensitive layer on the downstream side in the transport direction, and the peeled and dispersed film is re-applied to the lithographic printing plate. Adherence is prevented and development can be performed satisfactorily.

  According to a third aspect of the present invention, in the lithographic printing plate developing device according to the second aspect, the transport means is lower on the upstream side in the transport direction than a position where water or an aqueous liquid hits the photosensitive layer. It is characterized by being.

  By configuring as described above, in addition to the operation and effect of the invention of claim 2, water or aqueous liquid hitting the photosensitive layer flows down to the upstream side in the transport direction due to attractive force, so that the surface of the photosensitive layer Water or an aqueous liquid is prevented from remaining on the top.

  According to a fourth aspect of the present invention, in the lithographic printing plate developing apparatus according to the second or third aspect, the transport means transports the lithographic printing plate with the photosensitive layer down. It is characterized by.

  With the configuration described above, in addition to the functions and effects of the invention described in claim 2 or claim 3, water or an aqueous liquid that has hit the photosensitive layer flows down directly from the surface of the photosensitive layer by attractive force. Water or an aqueous liquid is prevented from remaining on the photosensitive layer.

  The lithographic printing plate developing device according to claim 5 of the present invention is a lithographic printing plate developing device which forms an image by defilming and dispersing with water or an aqueous liquid after exposure, and a latent image formed on the film of the photosensitive layer. A conveying means for conveying the lithographic printing plate that has been exposed so that the image portion or the non-image portion of the film is composed of a film that is not cured by the exposure processing, with the film of the photosensitive layer facing upward, and a conveying means Spray nozzle for injecting water or water-based pressure water in a direction opposite to the transport direction to the film directed on the photosensitive layer of the lithographic printing plate transported by lithographic printing, transported on the transport means A drain disposed under the plate and receiving water or aqueous liquid sprayed from the spray nozzle, a pipe filter in which water or aqueous liquid extracted from the drain through the liquid feeding pipe is disposed in the middle of the liquid feeding pipe, and a pump And through A circulation fluid circuit of water or aqueous liquid is jetted by circulating the Renozuru, characterized by having a.

  By configuring as described above, fresh water or aqueous liquid water flow is always applied from the spray nozzle to the downstream side in the transport direction on the surface of the photosensitive layer of the lithographic printing plate, and the peeled and dispersed film is formed. Since the contained water or aqueous liquid flows down from the transport upstream side, the water or aqueous liquid containing the peeled and dispersed film does not remain on the surface of the photosensitive layer on the downstream side in the transport direction, and the peeled and dispersed film is formed. Re-adhesion to the lithographic printing plate is prevented and good development can be performed.

  The lithographic printing plate developing device according to claim 6 of the present invention is a lithographic printing plate developing device in which an image is formed by film removal and dispersion with water or an aqueous liquid after exposure, and a latent image formed on the film of the photosensitive layer. A conveying means for conveying the lithographic printing plate that has been exposed so that the image portion or the non-image portion of the film is composed of a film that has not been cured by the exposure processing, with the film of the photosensitive layer facing down; In the transport direction of the lithographic printing plate, in the transport direction with respect to the film directed under the photosensitive layer of the lithographic printing plate being transported at a portion inclined so as to rise horizontally or obliquely from the upstream side to the downstream side A spray nozzle that applies water or an aqueous liquid flow in the opposite direction, a drain that is disposed below the planographic printing plate that is transported on the transport means, and that receives water or an aqueous liquid sprayed from the spray nozzle; Liquid feeding pipe And a water or aqueous liquid circulating fluid circuit that circulates the water or aqueous liquid extracted in the middle of the liquid supply pipe and circulates it through the pump to the spray nozzle and injects it. .

  By configuring as described above, the water or aqueous liquid sprayed from the spray nozzle is opposite to the transport direction of the planographic printing plate with respect to the surface of the photosensitive layer facing the lower side of the planographic printing plate that is transported obliquely. By spraying in the direction and obliquely downward, the water or aqueous liquid containing the peeled and dispersed film is naturally applied to the lower part of the lithographic printing plate in combination with the spray force from the spray nozzle and the attractive force. By flowing down and flowing into the drain, it is possible to sufficiently prevent the debris of the peeled film from remaining on the plate surface on the downstream side in the transport direction of the planographic printing plate, or to re-adhere, and to perform good development.

  The lithographic printing plate developing device according to claim 7 of the present invention is a lithographic printing plate developing device which forms an image by defilming and dispersing with water or an aqueous liquid after exposure, and a latent image formed on the film of the photosensitive layer. The lithographic printing plate that has been exposed so that the image part or non-image part of the film is composed of a film that has not been cured by the exposure process passes through a vertical conveying means that rises vertically from the upstream side to the downstream side in the conveying direction. A transport nozzle, a spray nozzle for applying water or an aqueous liquid in a direction opposite to the transport direction to the photosensitive layer film of the lithographic printing plate transported through the vertical transport means, and a vertical transport means A drain disposed on the lower side for receiving water or an aqueous liquid sprayed from a spray nozzle; a pipe filter disposed in the middle of the liquid feeding pipe for extracting water or an aqueous liquid extracted from the drain through the liquid feeding pipe; and a pump; And having a circulation fluid circuit of the water jetting or aqueous liquid is circulated to the spray nozzle through.

  By configuring as described above, the water or aqueous liquid sprayed from the spray nozzle is transported to the surface of the lithographic printing plate, which is transported on the vertical transport means, to the surface of the photosensitive layer facing substantially vertically. By spraying in the direction opposite to the direction, the water or aqueous liquid containing the peeled and dispersed film is transported on the vertical transport means in combination with the spray force and attractive force from the spray nozzle. By rapidly flowing down immediately below, it is possible to sufficiently prevent the film peeled and dispersed from remaining on the plate surface on the downstream side in the transport direction so as to flow into the drain, and to re-adhere, so that good development can be performed.

  According to the lithographic printing plate development method and development apparatus of the present invention, it is possible to easily wash off the exposed lithographic printing plate using simple means before loading the lithographic printing plate into the printing press. There is an effect that it can be developed.

  A planographic printing plate developing method and developing apparatus according to a first embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 shows a schematic configuration of the entire developing device according to the present embodiment. The developing device 10 scans and exposes an original of the lithographic printing plate 12 with an infrared laser (hereinafter referred to as “IR laser L”) modulated based on digital image information. An image (latent image) corresponding to the information is formed.

  The lithographic printing plate 12 used here is obtained by forming an image recording layer containing a thermosetting heat-sensitive material on a support, and is composed of water or an aqueous liquid (water or dampening water used in a printing machine). An aqueous liquid or an aqueous liquid obtained by adding a required drug to water) is developed so as to be defilmed and dispersed to develop an image. After exposure, the film is dedispersed and dispersed with water or an aqueous liquid. A lithographic printing plate for image formation.

  The planographic printing plate 12 includes an image recording layer (hereinafter simply referred to as “recording layer”) formed on the surface of a support made of aluminum or an aluminum alloy. This recording layer contains a hydrophobizing precursor and a photothermal conversion agent.

  The lithographic printing plate 12 (lithographic printing plate that forms an image by film removal and dispersion with water or an aqueous liquid after exposure) includes, for example, a microcapsule encapsulating a heat-reactive compound in the image recording layer, a polymerization initiator, and the like. What contains a photothermal conversion agent can be used. Further, since the polymerization initiator such as a radical initiator or an acid generator and the photothermal conversion agent may be present either inside or outside the microcapsule, they are added to at least one of the recording layer matrix. Just do it. However, from the viewpoint of storage stability, the polymerization initiator is preferably added to the recording layer matrix. Moreover, it is preferable to add a photothermal conversion agent in a microcapsule from a viewpoint of a sensitivity.

  As shown in FIG. 1, the developing device 10 is provided with a laser recording unit 11 and a water developing unit 100.

  Further, in the developing device 10, a conveying device 104 that performs a carry-in operation and a carry-out operation of the lithographic printing plate 12 is disposed at a position between the laser recording unit 11 and the water developing unit 100.

  The transport device 104 includes a plurality of transport rollers 35 and a plate-shaped guide member 36 arranged along the transport path of the planographic printing plate 12. The conveying device 104 includes a laser recording unit loading / unloading position for performing an operation of loading or unloading the lithographic printing plate 12 indicated by an imaginary line in FIG. 1 into the laser recording unit 11 as an exposure processing unit, and a solid line in FIG. The lithographic printing plate 12 shown in FIG. 5 is configured to be able to rotate and move between the water developing unit carrying-in position where the operation for carrying in the water developing unit 100 is carried out.

  As shown in FIGS. 1 and 2, a cylindrical outer drum 20 on which a single lithographic printing plate 12 is detachably mounted is attached to a laser recording unit 11 as an exposure processing unit so as to be rotationally driven. On the outer peripheral surface of the outer drum 20, a chuck mechanism 22 is provided for engaging the front end portion and the rear end portion of the planographic printing plate 12 with the outer peripheral surface of the outer drum 20. Is disposed on the outer peripheral surface of the outer drum 20.

  As shown in FIG. 2, an exposure head 26 is arranged facing the outer drum 20 in the laser recording unit 11 that is the exposure processing unit. The exposure head 26 is mounted by a feed mechanism 28 so as to be movable along the sub-scanning direction. An LD light source device 32 for supplying the IR laser L to the exposure head 26 is disposed at a lower position of the outer drum 20.

  The exposure head 26 in the laser recording unit 11 includes a lens unit 58 that includes a plurality of lenses and forms an imaging optical system, a pair of support plates that sandwich the tips of a plurality of optical fibers 70, and the optical fiber 70. And a fiber holder 60 made of a transparent protective plate or the like for protecting the front end surface of the optical fiber.

  The exposure head 26 images the IR laser L emitted from each of the plurality of optical fibers 70 onto the original of the planographic printing plate 12 mounted on the outer drum 20 by the lens unit 58, and has a predetermined shape and size. The exposure is performed with a beam spot having

  The exposure head 26 is configured to be a multi-beam type capable of simultaneously projecting a plurality of beam spots on the original plate of the planographic printing plate 12, and the plurality of beam spots are sub-scanned on the original plate of the planographic printing plate 12. They are arranged along the direction or arranged on a straight line slightly inclined with respect to the sub-scanning direction.

  The other ends of the plurality of optical fibers 70 connected to the exposure head 26 are connected to a plurality of semiconductor lasers 72 in the LD light source device 32 as shown in FIG. The semiconductor laser 72 in the LD light source device 32 is fixed on a plate-shaped heat sink 74.

  A connector array 76 is provided in the middle of the optical fiber 70, and the optical fiber 70 can be brought into contact with and separated from the fiber holder 60 side and the semiconductor laser 72 side through the connector array 76. . Thereby, for example, when one of the semiconductor lasers LD fails, the failed semiconductor laser 72 can be easily replaced without disassembling the fiber holder 60 or the like.

  A portion (tip side) of the plurality of optical fibers 70 on the exposure head 26 side is inserted into a tube-shaped cable bear 78. The cable bear 78 has a structure in which a large number of link pieces 82 divided in the longitudinal direction are linked in series, and can be bent in the vertical direction.

  The cable bear 78 is mounted on a lower side of the guide rail 62 of the feed mechanism 28 in a bowl-shaped bear guide 80 disposed so as to extend in the sub-scanning direction.

  The bear guide 80 is configured to restrict the movement of the cable bear 78 in the front-rear direction while supporting the cable bear 78 from below. As a result, when the exposure head 26 moves in the sub-scanning direction, the tip end portion of the optical fiber 70 that moves together with the exposure head 26 is protected by the cable bear 78, and the optical fiber 70 is prevented from being damaged.

  The exposure head 26 is mounted on a plate-like carrier 68 in the feeding mechanism 28, and moves along the sub-scanning direction (direction of arrow S in FIG. 2) integrally with the carrier 68.

  The feed mechanism 28 includes a pair of guide rails 62 that support the carrier 68 so as to be slidable along the sub-scanning direction, and a feed screw shaft 66 connected to the motor unit 64. A block-shaped female screw member 69 is fixed to the lower surface of the carrier 68, and a screw shaft 66 is screwed into a female screw hole formed in the female screw member 69.

  In the feed mechanism 28 configured as described above, the screw shaft 66 is rotationally controlled by the motor unit 64 so that the exposure head 26 integrated with the carrier 68 is moved in a direction corresponding to the rotation direction of the screw shaft 66 (in the sub-scanning direction). A control operation of moving the screw shaft 66 by a distance corresponding to the amount of rotation of the screw shaft 66 in the forward or backward direction) is performed.

  In the laser recording unit 11, the exposure process for the planographic printing plate 12 is performed only when the exposure head 26 moves forward in the sub-scanning direction.

  The laser recording unit 11, which is an exposure processing unit configured as described above, scans and exposes the original of the planographic printing plate 12 mounted on the outer drum 20 by the IR laser L modulated based on the digital image information. A latent image corresponding to the digital image information is formed on the recording layer of the original plate of the printing plate 12.

  As shown in FIG. 1, in the laser recording unit 11 that is an exposure processing unit configured in this way, when the original of the planographic printing plate 12 is conveyed to the vicinity of the upper end of the outer drum 20 by the conveying device 104, the chuck The mechanism 22 chucks the leading end of the original plate of the planographic printing plate 12 on the outer peripheral surface of the outer drum 20 and starts rotating the outer drum 20 in a predetermined forward rotation direction (the direction of arrow R1 in FIG. 1). As a result, the original plate of the planographic printing plate 12 whose tip is constrained on the outer peripheral surface of the outer drum 20 is wound around the guide roller 24 so as to be pressed onto the outer peripheral surface of the outer drum 20 so as to be in close contact therewith.

  In the laser recording unit 11, when the original plate of the lithographic printing plate 12 is wound around the outer peripheral surface of the outer drum 20 to the rear end portion, the rear end portion of the original plate of the lithographic printing plate 12 is outer peripheral surface of the outer drum 20 by the chuck mechanism 22. Chucked up. As a result, the entire lithographic printing plate 12 is tightly wound on the outer peripheral surface of the outer drum 20, and the operation of mounting the lithographic printing plate 12 on the outer drum 20 is completed.

  As shown in FIG. 2, the laser recording unit 11 as the exposure processing unit rotates the outer drum 20 to perform main scanning and feed while the original of the planographic printing plate 12 is wound around the outer drum 20. While moving the exposure head 26 in the sub-scanning direction by the mechanism 28 (sub-scanning), the original of the lithographic printing plate 12 is irradiated with the IR laser L emitted from the exposure head 26 to scan exposure the original of the lithographic printing plate 12. I do.

  In the laser recording unit 11 serving as the exposure processing unit, when the exposure (image formation) process for the planographic printing plate 12 mounted on the outer drum 20 is completed as described above, the outer drum 20 is moved in the reverse direction (the arrow in FIG. 1). R2 direction) and the rear end portion and the front end portion of the planographic printing plate 12 are sequentially released from the outer drum 20 by the chuck mechanism 22.

  In conjunction with this, the conveying device 104 rotates the conveying roller 35 so that the planographic printing plate 12 carried out from the outer peripheral surface of the outer drum 20 is mounted on the guide member 36. Placed on the transport roller 35.

  Thereafter, the conveying device 104 moves from the laser recording unit loading / unloading position shown by the imaginary line in FIG. 1 to the water developing unit loading position shown by the solid line in FIG. The lithographic printing plate that forms an image by dispersing the film is carried into the water developing unit 100.

  As shown in FIG. 1, in the developing device 10, a water developing unit 100 is disposed above the outer drum 20.

  The water developing unit 100 has a predetermined range in the lower portion of the transport path (transport means) of the planographic printing plate 12 in which a plurality of transport roller pairs 108 (nip rollers) for transporting the planographic printing plate 12 are arranged at predetermined intervals. A drain 106 is disposed across which receives water or an aqueous liquid.

  In the water developing unit 100, a spray nozzle 110 is disposed at a position between the two pairs of transport rollers 108 in the upper part of the transport path (transport means) of the planographic printing plate 12. The spray nozzle 110 is configured to apply pressurized water or water to the surface of the lithographic printing plate 12 conveyed on the drain 106 by a pair of conveying rollers 108 disposed at front and rear positions on the conveying path (conveying means). Formed on the exposed lithographic printing plate 12 by using a lithographic printing plate development method in which an aqueous liquid is sprayed vigorously toward the upstream side of the transport direction of the lithographic printing plate 12 (spraying with a jet of strong water current) The film is exposed to water or an aqueous liquid on the unexposed portion of the photosensitive layer, and washed off (the unexposed portion of the film is removed by dispersion with water or an aqueous liquid and removed).

  For this reason, when water or an aqueous liquid is sprayed on the lithographic printing plate 12, the lithographic printing plate 12 is opposed to the lower side of the transport path of the lithographic printing plate 12 corresponding to the portion where the pressurized water or aqueous liquid is sprayed. A support roller 112 that is in rolling contact is disposed so as to convey the lithographic printing plate 12 while holding the plate surface against the water pressure.

  In the water developing unit 100, a filter 116 is disposed in the middle of the liquid feed pipe 114 drawn from the bottom of the drain 106 that receives and stores water or an aqueous liquid sprayed from the spray nozzle 110, and further in the liquid feed pipe 114. A pump 118 is disposed between the filter 116 and the spray nozzle 110 to form a water or aqueous liquid circulating fluid circuit.

  Further, in the circulating fluid circuit of water or aqueous liquid, a part of the liquid feeding pipe 114 drawn from the pump 118 is arranged along the width direction of the planographic printing plate 12 (perpendicular to the paper surface of FIG. 1). A plurality of spray nozzles 110 may be provided on the liquid feeding pipe 114 at predetermined intervals so as to extend toward the upper surface of the planographic printing plate 12.

  In the water or aqueous liquid circulating fluid circuit of the water developing unit 100 configured in this way, the water or aqueous liquid pressurized and sprayed from the spray nozzle 110 is removed from the direction opposite to the transport direction of the planographic printing plate 12. The film of the non-image area (negative) or image area (positive) that has not been cured by the exposure treatment is peeled off from the surface of the support by applying water and pressure to the entire photosensitive layer on the surface of the planographic printing plate 12 vigorously. Then, a wash-off process for forming an image is performed.

  In this way, in the water or aqueous liquid used for the wash-off, the capsule particles constituting the photosensitive layer film or the so-called soot-like material in which the photosensitive layer film becomes fine fragments floated. Become.

  Therefore, in the water developing unit 100 to which this lithographic printing plate developing method is applied, water or an aqueous liquid sprayed from the spray nozzle 110 is applied to the lithographic printing plate 12 from the direction opposite to the transport direction of the lithographic printing plate 12. Thus, the water or aqueous liquid containing the peeled and dispersed film flows in the direction opposite to the transport direction of the planographic printing plate 12 and flows into the drain 106 so that it does not stop on the plate surface of the planographic printing plate 12. To make a flow on the plate.

  In this lithographic printing plate development method, fresh water or an aqueous liquid (wash liquid) is always supplied to the downstream side in the transport direction on the plate surface of the lithographic printing plate 12, and water containing a peeled and dispersed film is included. Alternatively, since the aqueous liquid flows down to the drain 106 from the upstream side of conveyance, the water or the aqueous liquid containing the peeled and dispersed film (water or aqueous liquid contaminated with film debris) remains on the plate surface on the downstream side in the conveyance direction. Thus, the peeled and dispersed film is prevented from reattaching to the lithographic printing plate 12, and development can be performed satisfactorily.

  In the case of washing off by means of a conventional brush, mop, sponge or the like, several times are required to wash off to a good development state in which the peeled film is not reattached to the surface of the lithographic printing plate 12. However, by using the water developing unit 100 having a simple configuration as described above, such a labor can be saved and the water developing process can be performed in a good state. Further, compared to the case where the water developing unit is configured using a brush, mop, sponge, or the like, the water developing unit 100 according to the present embodiment is configured by the spray nozzle 110, and thus a mechanism capable of moving the brush, mop, sponge, or the like. A simple and inexpensive device can be provided by omitting.

  In the water or aqueous liquid circulating fluid circuit of the water developing unit 100, the water or aqueous liquid used for the wash-off as described above flows into the drain 106 and is stored.

  The water or aqueous liquid stored in the drain 106 was drawn out from the liquid feeding pipe 114 and formed a photosensitive layer film floating in the water or aqueous liquid when passing through the filter 116. The so-called cocoon-shaped material in which the capsule particles or the film of the photosensitive layer becomes fine fragments is filtered.

  The water or aqueous liquid filtered by the filter 116 is pressurized by the pump 118, sprayed from the spray nozzle 110 again, and circulated so as to be reused in the wash-off process.

  Next, the operation and operation of the above-described developing device 10 will be described.

  When an image is formed on the lithographic printing plate 12 (lithographic printing plate that forms an image by removing the film with water or an aqueous liquid after exposure) using the developing device 10, first, an undeveloped lithographic printing plate 12 is used. It is inserted on the conveying device 104 inside the developing device 10.

  Then, the planographic printing plate 12 is carried into the laser recording unit 11 by the conveying device 104 and chucked on the outer peripheral surface of the outer drum 20 by the chuck mechanism 22 to complete the preparation for exposure. Thereafter, the laser recording section 11 performs exposure processing (scanning exposure processing) by scanning while irradiating the lithographic printing plate 12 with the IR laser L from the exposure head 26 to form a latent image.

  The planographic printing plate 12 on which the latent image is formed is released from the outer drum 20 by the chuck mechanism 22 and is discharged onto the transport device 104. Then, the transport device 104 carries out the lithographic printing plate 12 toward the water developing unit 100.

  The water developing unit 100 completes the lithographic printing plate 12 on which an image is formed by carrying out a water development process on the lithographic printing plate 12 that has been carried in, and is carried out on a tray or the like outside the apparatus (not shown).

  The planographic printing plate 12 on which an image is formed in this manner is mounted on a printing machine (not shown) and used for printing.

  In addition, in the developing device 10 described above, the laser recording unit 11 and the water developing unit 100 are configured as an integrated device, but an apparatus having the laser recording unit 11 and an apparatus having the water developing unit 100 are provided. These may be configured as separate devices.

  In this case, the lithographic printing plate 12 is exposed with an apparatus having a laser recording unit 11, and then the lithographic printing plate 12 on which a latent image is formed is applied to an apparatus having a separate water developing unit 100, The planographic printing plate 12 on which the image is formed is completed.

  Next, a second embodiment of the present invention will be described with reference to FIGS.

  In the second embodiment, the lithographic printing plate 12 is unloaded from the laser recording unit 11 with the photosensitive layer facing down, and the water developing unit 100 has the photosensitive layer of the lithographic printing plate 12 facing down. Configure to wash off.

  For this reason, in the laser recording unit 11 in the second embodiment, the operation of loading or discharging the lithographic printing plate 12 to or from the outer drum 20 is performed. An end chuck attaching / detaching mechanism 120, an inlet side tip chuck opening / closing mechanism 122, and a loading squeeze roller 124 are arranged, and an outlet side rear end chuck attaching / detaching mechanism 126 and an outlet side tip chuck opening / closing mechanism 128 are disposed at positions where the outer drum 20 touches downward in the drawing. In addition, a discharge squeeze roller 130 is arranged.

  As shown in FIG. 3, in the developing device 10 according to the second embodiment, the water developing unit 100 is disposed obliquely below the outer drum 20.

  In the water developing unit 100, a plurality of conveying roller pairs 108 are arranged at predetermined intervals, and an upward conveying path of the lithographic printing plate 12 that is inclined so as to rise obliquely from the upstream side to the downstream side in the conveying direction of the lithographic printing plate 12 is configured. To do.

  A drain 106 for receiving water or an aqueous liquid is disposed over a predetermined range in the lower part of the upward conveyance path.

  Further, a spray nozzle 110 is disposed in the water developing unit 100 at the lower part of the upward conveyance path of the planographic printing plate 12. The spray nozzle 110 applies pressurized water or aqueous liquid to the photosensitive layer of the planographic printing plate 12 above the drain 106 substantially upstream in the transport direction of the planographic printing plate 12 (on the lower transport side in the upstream transport path). ) Is formed on the exposed lithographic printing plate 12 by using a lithographic printing plate development method of spraying vigorously so that it strikes the photosensitive layer of the lithographic printing plate 12 obliquely (spraying with a jet of strong water) The film of the unexposed part in the exposed photosensitive layer is washed off with water or an aqueous liquid (the film of the unexposed part is removed by film removal and dispersion with water or an aqueous liquid).

  In the water developing unit 100 configured as described above, the water or aqueous liquid sprayed from the spray nozzle 110 is applied to the planographic printing plate 12 with respect to the surface of the photosensitive layer facing the planographic printing plate 12 conveyed obliquely. The water or aqueous liquid containing the peeled and dispersed film is combined with the spray force from the spray nozzle 110 and the attractive force due to being sprayed in the opposite direction and obliquely downward. A plate surface of the lithographic printing plate 12 on the downstream side in the conveying direction from the position of the spray nozzle 110 so that the film remains in the drain 106 by naturally flowing down to the lower part of the printing plate 12 (upstream in the conveying direction). Do not remain in the.

  That is, in the developing device 10 according to the second embodiment, fresh water or an aqueous liquid (wash liquid) is always supplied to the downstream side in the transport direction on the plate surface of the planographic printing plate 12, and the peeling dispersion is performed. The water or aqueous liquid containing the film flows from the upstream side of the transport direction to the transport roller pair 108 as a means for draining water from the upstream of the transport direction by the action of attractive force. Since the water or aqueous liquid containing the peeled and dispersed film (water or aqueous liquid contaminated with the membrane debris) is unlikely to rise upward against the attractive force, the peeled and dispersed film It is possible to sufficiently prevent the debris from remaining on the plate surface or from reattaching, and to perform good development.

  It should be noted that the position of the spray nozzle 110 that sprays water or an aqueous liquid onto the plate surface of the planographic printing plate 12 is more transported if it is disposed at the same height as or higher than the transport roller pair 108 as a means for draining water. It becomes easy to generate a reverse flow.

  Next, operations and operations relating to the lithographic printing plate developing apparatus in the second embodiment configured as described above will be described.

  In the case where an image is formed on the planographic printing plate 12 (lithographic printing plate on which film formation and dispersion is performed after exposure with water or an aqueous liquid) using the developing device 10 according to the second embodiment, first undeveloped The planographic printing plate 12 is inserted on the transport device 104 inside the developing device 10. Then, the transport device 104 starts an operation of carrying the planographic printing plate 12 into the laser recording unit 11 as shown in FIG.

  As a preparatory operation before the undeveloped planographic printing plate 12 is carried into the laser recording unit 11, in the laser recording unit 11, the rear end chuck attaching / detaching mechanism 120 holds the rear end chuck 132 as shown in FIG. 4A. In this state, the inlet-side tip chuck opening / closing mechanism 122 is operated so as to open the tip chuck 134, and the loading squeeze roller 124 is disengaged from the outer peripheral surface of the outer drum 20.

  Further, at this time, in the laser recording unit 11, the outlet side rear end chuck attaching / detaching mechanism 126 waits in a state in which the rear end chuck 132 is released, and the outlet side front end chuck opening / closing mechanism 128 is in a standby state before operation, and the ejection squeeze is squeezed. The roller 130 is separated from the outer peripheral surface of the outer drum 20.

  Next, when the front end of the planographic printing plate 12 is fed between the open front end chuck 134 and the outer drum 20, the front end chuck 134 is closed by the inlet side front end chuck opening / closing mechanism 122, and the planographic printing plate 12. 4B with the tip chuck 134 chucked by the tip chuck 134.

  Next, from the state shown in FIG. 4B, the outer drum 20 starts to rotate in a predetermined forward rotation direction (the direction of the arrow R1 in the figure), and the loading squeeze roller 124 moves the planographic printing plate 12 on the outer peripheral surface of the outer drum 20. The state shifts to the state shown in FIG.

  Further, when the outer drum 20 is rotated by a predetermined angle in the normal rotation direction R1 from the state shown in FIG. 4C and the rear end portion of the planographic printing plate 12 reaches a position directly below the inlet side rear end chuck attaching / detaching mechanism 120, the inlet side rear end is reached. The chuck attaching / detaching mechanism 120 performs an operation of chucking the rear end portion of the planographic printing plate 12 on the outer drum 20 with the rear end chuck 132 as shown in FIG. 5A, and the planographic plate on the outer drum 20 as shown in FIG. 5B. The printing plate 12 is brought into an exposure processing state in which the front end chuck 134 and the rear end chuck 132 are held in contact.

  In the laser recording unit 11, the planographic printing plate 12 is set in the exposure processing state shown in FIG. 5B, and exposure processing is performed by the exposure head 26 to form a latent image.

  Next, when the exposure process is completed, as shown in FIG. 6A, the exit side rear end chuck attaching / detaching mechanism 126 descends onto the rear end chuck 132 and catches it, and then ascends as shown in FIG. An operation for releasing the chuck 132 from the rear end of the planographic printing plate 12 is performed. Along with this operation, the discharging squeeze roller 130 is held in a state of rolling so as to be lowered onto the rear end portion of the lithographic printing plate 12 and sandwich the lithographic printing plate 12 on the outer peripheral surface of the outer drum 20.

  Next, from the state shown in FIG. 6B, the outer drum 20 is rotated by a predetermined small angle in the forward rotation direction R1, and the rear end of the planographic printing plate 12 is detached from the position directly below the outlet side rear end chuck attaching / detaching mechanism 126. The state shown in 6C, the outlet side rear end chuck attaching / detaching mechanism 126 is operated, and the rear end chuck 132 is moved to a predetermined position on the outer peripheral surface of the outer drum 20 as shown in FIG. It is engaged at a predetermined position that is not wound.

  Next, from the state shown in FIG. 7A, the outer drum 20 is rotated in the reverse rotation direction (the direction of the arrow R2 in the figure), so that the planographic printing plate 12 is moved from the rear end side into the water developing unit 100 as shown in FIG. 7B. Start importing. Then, as shown in FIG. 8A, when the planographic printing plate 12 reaches a state where it is drawn out onto the transport path to the water developing unit 100 over its entire length, as shown in FIG. Is operated so as to open the front end chuck 134 to open the front end portion of the planographic printing plate 12 so that the entire planographic printing plate 12 can be carried into the water developing unit 100.

  Although not shown, in the laser recording unit 11, the outer drum 20 is rotated from the state shown in FIG. 8C in the normal rotation direction (in the direction of arrow R1 in the figure) to cause the rear end chuck 132 to move to the rear end on the inlet side. 4A by causing the inlet side rear end chuck attaching / detaching mechanism 120 to pick up and hold the rear end chuck 132 from the outer peripheral surface of the outer drum 20 with the position immediately below the chuck attaching / detaching mechanism 120. The undeveloped lithographic printing plate 12 is returned to the preparatory state before being carried into the laser recording unit 11 and waits for the next operation.

  As shown in FIG. 8C, the lithographic printing plate 12 that has been subjected to the exposure processing in this manner and carried out of the laser recording unit 11 is carried into the water developing unit 100 and subjected to water development processing to form an image. Is completed and carried out on a tray (not shown) outside the apparatus.

  Since the configuration, operation, and effects of the second embodiment other than those described above are the same as those of the first embodiment described above, the same members are denoted by the same reference numerals, and the description thereof is omitted. .

  Next, a third embodiment of the present invention will be described with reference to FIG.

  In the third embodiment, the lithographic printing plate 12 (lithographic printing plate that forms an image by removing the film with water or an aqueous liquid after exposure) is unloaded from the laser recording unit 11 with the photosensitive layer facing down. The water developing unit 100 is configured to wash off in a state where the photosensitive layer of the planographic printing plate 12 is oriented vertically (a state where the photosensitive layer is oriented substantially vertically).

  For this reason, in the laser recording unit 11 according to the third embodiment, the operation of loading or discharging the lithographic printing plate 12 to or from the outer drum 20 is performed. An end chuck attaching / detaching mechanism 120, an inlet side tip chuck opening / closing mechanism 122, and a loading squeeze roller 124 are arranged, and the outlet side rear end chuck attaching / detaching mechanism 126 and the outlet side tip chuck opening / closing mechanism 128 are disposed at positions where the outer drum 20 hits downward in the drawing. In addition, a discharge squeeze roller 130 is arranged.

  As shown in FIG. 9, in the developing device 10 according to the third embodiment, the water developing unit 100 is arranged next to the outer drum 20.

  In the water developing unit 100, a draining roller 136 composed of a pair of a large-diameter roller and a small-diameter roller and a plurality of conveying roller pairs 108 are arranged at predetermined intervals, respectively, and downstream of the planographic printing plate 12 from the upstream side in the conveying direction. A transport path for the lithographic printing plate 12 having a vertical transport path SW portion that rises vertically (substantially vertical) toward the side.

  As illustrated in FIG. 9, the conveyance path configured in the water developing unit 100 is pulled out from the lower portion of the outer drum 20, bent in the vertical direction by the draining roller 136, and the vertical conveyance path SW is set. The lithographic printing plate 12 is bent in the lateral direction so as to carry out the lithographic printing plate 12 onto the conveying device 104 at the upper part of the conveying path SW, and the whole is set to have a substantially inverted U shape.

  A drain 106 that receives water or an aqueous liquid is disposed over a predetermined range below the draining roller 136 that hits the lower portion of the vertical conveyance path SW.

  In the water developing unit 100, the spray nozzles 110 are arranged in two upper and lower stages adjacent to the vertical conveyance path SW of the planographic printing plate 12. Further, a support roller 112 is arranged to contact the roller so that the lithographic printing plate 12 is conveyed while being supported from the back side under pressure when water or an aqueous liquid is sprayed on the lithographic printing plate 12.

  The spray nozzle 110 of the water developing unit 100 applies pressurized water or an aqueous liquid to the photosensitive layer of the lithographic printing plate 12 on the longitudinal conveyance path SW above the drain 106 and applies the pressurized water or aqueous liquid to the photosensitive layer of the lithographic printing plate 12. To the lower side (inclined toward the upstream side of the transport direction of the planographic printing plate 12 (the lower end side of the longitudinal transport path SW)) (by spraying with a strong jet of water) The film of the unexposed part in the photosensitive layer formed on the exposed lithographic printing plate 12 is washed off with water or an aqueous liquid (the film of the unexposed part is removed by film removal and dispersion with water or an aqueous liquid). Constitute.

  In the water developing unit 100 configured as described above, water or aqueous liquid sprayed from the spray nozzle 110 is applied to the surface of the photosensitive layer facing the substantially vertical direction of the planographic printing plate 12 conveyed on the vertical conveyance path SW. The water or aqueous liquid containing the peeled and dispersed film is sprayed from the spray nozzle 110 by being sprayed obliquely downward and applied to the planographic printing plate 12 in a direction opposite to the conveying direction of the planographic printing plate 12. The spray force on the lithographic printing plate 12 is caused to flow into the drain 106 by flowing down immediately below the lithographic printing plate 12 being conveyed on the vertical conveyance path SW in combination with the jet force and the attractive force of the lithographic printing plate 12. It is ensured that no peeled and dispersed film remains on the plate surface downstream in the transport direction from the position of the nozzle 110.

  That is, in the developing device 10 according to the third embodiment, fresh water or an aqueous liquid (wash liquid) is always supplied to the downstream side in the transport direction on the plate surface of the lithographic printing plate 12, and peeling dispersion is performed. The water or aqueous liquid containing the deposited film rapidly flows from the upstream side in the transport direction of the vertical transport path SW to the drain 106 due to the attractive force, and the remnant of the separated film remains on the plate surface or is reattached. Can be sufficiently prevented and development can be carried out satisfactorily.

  Next, operations and operations relating to the lithographic printing plate developing apparatus in the third embodiment configured as described above will be described.

  When an image is formed on the planographic printing plate 12 using the developing device 10 according to the third embodiment, the undeveloped planographic printing plate 12 is first inserted on the transport device 104 inside the developing device 10. Then, the transport device 104 rotates to carry the planographic printing plate 12 into the laser recording unit 11.

  In the laser recording unit 11, as the lithographic printing plate 12 is carried in, the leading end chuck opening / closing mechanism 122 chucks the lithographic printing plate 12 and the loading squeeze roller 124 moves the lithographic printing plate 12 onto the outer peripheral surface of the outer drum 20. The lithographic printing plate 12 is brought into close contact with the outer drum 20 by chucking the rear end portion of the planographic printing plate 12 with the rear end chuck 132 operated by the inlet side rear end chuck attaching / detaching mechanism 120. And the rear end chuck 132 are brought into an exposure processing state.

  In the laser recording unit 11, the lithographic printing plate 12 set in the exposure processing state is subjected to exposure processing by the exposure head 26 to form a latent image.

  Next, when the exposure process is completed, the rear end chuck 132 is detached by the outlet side rear end chuck attaching / detaching mechanism 126, and the planographic printing plate 12 guided by the discharging squeeze roller 130 is moved by the reverse rotation operation of the outer drum 20 thereafter. It is carried into the water developing unit 100 from the end side.

  The lithographic printing plate 12 thus carried into the water developing unit 100 is turned upward by the draining roller 136 and is conveyed on the vertical conveyance path SW. Water or an aqueous liquid sprayed from the spray nozzle 110 is blown onto the surface of the photosensitive layer of the planographic printing plate 12 transported on the vertical transport path SW, and the film of the unexposed portion is washed off. The lithographic printing plate 12 on which an image has been formed by the water development process in this manner is bent in the conveyance direction sideways (substantially horizontal direction) by a conveyance roller 108 disposed at the uppermost part of the vertical conveyance path SW, and on a predetermined conveyance path. Are transported and discharged onto the transport device 104, and then transported by the transport device 104 onto a tray (not shown) outside the device.

  The configuration, operation, and effects of the third embodiment other than those described above are the same as those of the first or second embodiment described above. Is omitted.

  In the first to third embodiments described above, the configuration in which water or aqueous liquid is sprayed from the spray nozzle 110 only on the surface of the planographic printing plate 12 where the photosensitive layer is present has been described. By providing a spray nozzle that sprays water or an aqueous liquid on the back side of the printing plate 12, it is possible to prevent the remnant of the peeled and dispersed film from remaining on the back side of the lithographic printing plate 12 and preventing reattachment. You may comprise so that it may do.

1 is a configuration diagram showing an overall schematic configuration of a developing device according to a first embodiment in a lithographic printing plate developing method and developing device of the present invention. FIG. 3 is a schematic perspective view showing a part of a laser recording unit taken out from the developing device according to the first embodiment of the present invention. It is a block diagram which shows the whole schematic structure of the developing device which concerns on 2nd Embodiment of this invention. (A), (B), and (C) are enlarged schematic diagrams showing states in which the main part of the laser recording unit is taken out and the lithographic printing plate is wound around the outer drum in the developing device according to the second embodiment of the present invention. It is a block diagram. (A) (B) is an enlarged schematic block diagram which shows the state which takes out the principal part of a laser recording part and winds a planographic printing plate on an outer drum in the developing device which concerns on 2nd Embodiment of this invention, respectively. is there. (A), (B), and (C) are enlarged schematic configurations showing states in which the main part of the laser recording unit is taken out and the planographic printing plate is discharged from the outer drum in the developing device according to the second embodiment of the present invention. FIG. (A) (B) is an enlarged schematic block diagram which shows the state which takes out the principal part of a laser recording part and discharges a lithographic printing plate from an outer drum in the developing device which concerns on 2nd Embodiment of this invention, respectively. . (A), (B), and (C) are enlarged schematic configuration diagrams showing a state in which a planographic printing plate is carried out from a laser recording unit to a water developing unit in a developing device according to a second embodiment of the present invention. It is a block diagram which shows the whole schematic structure of the developing device which concerns on 3rd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Developing apparatus 11 Laser recording part 12 Planographic printing plate 20 Outer drum 35 Conveying roller 36 Guide member 100 Water developing part 104 Conveying apparatus 106 Drain 108 Conveying roller (nip roller)
110 Spray nozzle 112 Support roller 114 Liquid feed pipe 116 Filter 118 Pump 120 Inlet side rear end chuck attaching / detaching mechanism 122 Inlet side front end chuck opening / closing mechanism 126 Outlet side rear end chuck attaching / detaching mechanism 128 Outlet side front end chuck opening / closing mechanism 132 Rear end chuck 134 Tip chuck

Claims (7)

In the development method of a lithographic printing plate that forms an image by removing the film with water or an aqueous liquid after exposure,
A transport step for transporting the exposed lithographic printing plate;
A water supply step of applying water or an aqueous liquid to the photosensitive layer of the lithographic printing plate conveyed by the conveying means in a direction opposite to the conveying direction, and peeling off the unexposed or exposed photosensitive layer;
A development method for a lithographic printing plate comprising: In a developing device for a lithographic printing plate that forms an image by removing the film with water or an aqueous liquid after exposure,
Transport means having two sets of nip rollers for sandwiching and transporting the exposed lithographic printing plate;
A spray position is set between the two sets of nip rollers, and water or an aqueous liquid, which is pressurized in a direction opposite to the transport direction, is sprayed and applied to the photosensitive layer of the lithographic printing plate to be transported, Water supply means for peeling off the unexposed or exposed photosensitive layer;
A development apparatus for a lithographic printing plate comprising: 3. The lithographic printing plate developing device according to claim 2, wherein the conveying means is lower on the upstream side in the conveying direction than a position where water or an aqueous liquid hits the photosensitive layer. The lithographic printing plate developing device according to claim 2, wherein the transport unit transports the lithographic printing plate with the photosensitive layer facing down. In an image forming apparatus for a lithographic printing plate that forms an image by defilming and dispersing with water or an aqueous liquid after exposure,
The lithographic printing plate that has been exposed so that the image portion or non-image portion of the latent image formed on the film of the photosensitive layer is composed of a film that has not been cured by the exposure processing, and the film of the photosensitive layer Conveying means for conveying in a state directed,
A spray nozzle that injects water or pressure water of an aqueous liquid in a direction opposite to the transport direction to the film directed on the photosensitive layer of the planographic printing plate transported by the transport means;
A drain disposed on the lower side of the planographic printing plate that is transported on the transport means, and receives water or an aqueous liquid sprayed from the spray nozzle;
A water or aqueous liquid extracted from the drain through the liquid feed pipe, a pipe filter disposed in the middle of the liquid feed pipe, and a water or aqueous liquid circulating fluid circuit that circulates to the spray nozzle through a pump,
A development apparatus for a lithographic printing plate comprising: In an image forming apparatus for a lithographic printing plate that forms an image by defilming and dispersing with water or an aqueous liquid after exposure,
The lithographic printing plate that has been exposed so that the image portion or the non-image portion of the latent image formed on the photosensitive layer film is composed of a film that has not been cured by the exposure processing, the lower side of the photosensitive layer film Conveying means for conveying in a state directed,
In the transport means, the portion of the planographic printing plate that is transported through the inclined portion so as to rise horizontally or obliquely from the upstream side to the downstream side in the transport direction of the planographic printing plate is directed below the photosensitive layer. A spray nozzle that applies water or an aqueous liquid stream to the membrane in the direction opposite to the conveying direction;
A drain disposed on the lower side of the planographic printing plate that is transported on the transport means, and receives water or an aqueous liquid sprayed from the spray nozzle;
A water or aqueous liquid extracted from the drain through the liquid feed pipe, a pipe filter disposed in the middle of the liquid feed pipe, and a water or aqueous liquid circulating fluid circuit that circulates to the spray nozzle through a pump and jets the water or aqueous liquid.
A development apparatus for a lithographic printing plate comprising: In an image forming apparatus for a lithographic printing plate that forms an image by removing the film with water or an aqueous liquid after exposure,
The lithographic printing plate that has been exposed so that the image portion or non-image portion of the latent image formed on the film of the photosensitive layer is composed of a film that has not been cured by the exposure processing is applied from the upstream side to the downstream side in the transport direction. A conveying means configured to pass a vertical conveying means standing vertically;
A spray nozzle that applies water or an aqueous liquid stream in a direction opposite to the transport direction to the film of the photosensitive layer of the planographic printing plate that is transported through the portion of the vertical transport means;
A drain disposed below the vertical conveying means and receiving water or an aqueous liquid sprayed from the spray nozzle;
A water or aqueous liquid extracted from the drain through the liquid feed pipe, a pipe filter disposed in the middle of the liquid feed pipe, and a water or aqueous liquid circulating fluid circuit that circulates to the spray nozzle through a pump and jets the water or aqueous liquid.
A development apparatus for a lithographic printing plate comprising:

Images