JP2007229610A - Method and apparatus for removing foreign substance on surface of roller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and an apparatus which can effectively remove a foreign substance on the surface of a roller even in operation of a production line, decrease generation of quality troubles of a web, and further remove the foreign substance on the surface of the roller in a special step when the web is continuously transported in a plurality of processes. <P>SOLUTION: The foreign substance on the surface of the roller transporting a strip of the web 14 is removed, wherein a cleaning sheet 36, both the sides of which have adhesion layers 57, 58, is stuck to the side of the roller 31, 31, ..., the web 14 is transported with the web in contact with the roller 31, 31, ..., and therefore the foreign substance 35 on the surface of the roller 31, 31, ... is caught by the cleaning sheet 36. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method and apparatus for removing foreign matter on a roller surface, and more particularly, to a method and apparatus for removing foreign matter on a roller surface that conveys a strip-shaped web.

  When manufacturing photosensitive materials, photoengraving materials, magnetic recording materials, recording paper materials, photosensitive lithographic printing plates, etc., a web-like substrate such as a thin metal plate, paper, film, etc. is continuously applied in the longitudinal direction. Various processes are performed while running. For example, in a planographic printing plate production line, an aluminum web made of an aluminum material in a strip-like thin plate is used as a support for a planographic printing plate. This aluminum web is set on a planographic printing plate production line in the form of an aluminum coil wound in a roll shape, and is subjected to various surface treatments such as etching treatment and electrolytic treatment. Thereafter, a photosensitive material is applied on the surface of the aluminum web, and processing such as drying is performed to form a photosensitive layer. The lithographic printing plate on which the photosensitive layer is formed is cut into a required size in a cutting step and processed into a semi-finished product sheet.

  When foreign matter that occurs in the manufacturing process or enters from the outside of the manufacturing process adheres to the aluminum web, the foreign matter is sandwiched between the aluminum web and the transport roller or drive roller in the process of transport. This causes a problem that quality failures such as dents and scratches occur in the aluminum web. In particular, when the foreign matter carried by the web is transferred to the roller, quality failure occurs continuously due to the rotation period of the roller, which becomes a serious problem.

  In response to this, various measures have been taken to reduce the contamination of foreign substances adhering to the aluminum web by cleaning the manufacturing process. However, there are not only various types of foreign substances but also foreign substances generated in the manufacturing process, and it has been difficult to significantly reduce the mixing of foreign substances. In particular, a coating film such as a photosensitive layer formed on a lithographic printing plate is easily damaged, and there is a problem that a quality failure due to foreign matters is likely to occur after the coating / drying process.

  Conventionally, as a means to solve these problems, the rollers that have a quality failure are narrowed down from a large number of rollers, and the operation of the production line is temporarily stopped when the quality failure has exceeded the allowable limit. The foreign matter is removed by stopping and cleaning the corresponding roller.

  Patent Document 1 proposes a method of cleaning a roller surface in a document conveying device by feeding a cleaning sheet having an adhesive on one side into the document conveying device.

  Patent Document 2 proposes a method of cleaning a roller surface of a continuous processing apparatus for cold-rolled steel sheets by passing through a continuous steel sheet for maintenance on which a material layer having adhesive strength is formed.

In addition, Patent Document 3 proposes a method of capturing foreign matter on the surface of a rotating roller by pressing a nonwoven fabric or sponge on the surface of the roller.
JP 58-82287 A Japanese Patent Laid-Open No. 7-285643 JP-A-10-236629

  However, as in the conventional example, once the operation of the production line is stopped, the products remaining in the production line are out of quality standards and a large number of defective products are generated. Also, it takes a lot of time to bring the manufacturing conditions such as the chemical treatment process and the coating / drying process to a certain level after cleaning the rollers and restarting operation, as well as people entering the production line to clean the rollers. In this case, there is a problem that foreign matters are more easily mixed by dust brought in by a person.

  Further, Patent Documents 1 and 2 are based on the premise that a web as a final product is once removed from the production line and a dedicated cleaning sheet is conveyed from the sending part to the winding part. However, the lithographic printing plate production line has a chemical treatment process using acid / alkali, a heating or drying process, etc., and if the cleaning sheet is transported from the feeding part to the winding part, the cleaning sheet In some cases, the adhesive changes in quality or the adhesive is transferred to the roller surface, which causes a new quality failure.

  The present invention has been made in view of such circumstances, and a foreign matter removal method on a roller surface that can efficiently remove foreign matter on a roller surface even during operation of a production line, and can reduce the occurrence of a web quality failure, and An object is to provide an apparatus.

  According to a first aspect of the present invention, in order to achieve the above object, in the method for removing foreign matter from a roller surface for conveying a belt-shaped web, a cleaning sheet having adhesive layers formed on both sides is attached to the roller side surface of the web. In addition, the present invention provides a method for removing foreign matter on the roller surface, wherein the cleaning sheet captures foreign matter on the roller surface by transporting the web while making contact with the roller.

  According to the first aspect, the foreign matter on the roller surface at the subsequent stage can be efficiently removed compared to the step of attaching the cleaning sheet. Therefore, not only can the foreign matter on the roller surface be efficiently removed even during the operation of the production line, not only can the occurrence of web quality failure be reduced, but also when a web is continuously conveyed through a plurality of processes, a specific content within that In the process, foreign matter on the roller surface can be removed.

  Here, as a cleaning sheet, not only a sheet having an adhesive layer formed on both sides of a single sheet, but also a non-adhesive layer side of a plurality of sheets having an adhesive layer formed on one side are bonded with a double-sided tape or the like. Moreover, the sheet | seat etc. in which the adhesion layer was formed in both surfaces as a whole are also contained. The rollers include a conveyance roller, a driving roller, and the like.

  A second aspect of the present invention is characterized in that, in the first aspect, an adhesive force of an entire surface to be attached to the web among both surfaces of the cleaning sheet is larger than an adhesive force of an entire surface contacting the roller surface.

  According to the second aspect, it is possible to prevent the cleaning sheet from being peeled off from the web and wound around the roller surface or the adhesive of the cleaning sheet adhering to the roller surface. Accordingly, foreign matters on the roller surface can be efficiently removed even during operation of the production line, and occurrence of web quality failure can be reduced.

  In the second aspect of the present invention, the ratio of the adhesive strength of the entire surface is preferably in the range of 1 / 1.5 to 1/5 on the roller surface side / web surface side. Here, the ratio of the adhesive strength of the entire surface can be adjusted by the type, composition, amount, and area of the adhesive surface of the adhesive. In the cleaning sheet, the area where the adhesive layer is formed is preferably web surface side> roller surface side. Specifically, the area ratio of the roller surface side / web surface side is 1/2 to 1. A range of / 5 is more preferable. The length of the cleaning sheet only needs to be at least one round of the outer circumference of the roller, and is preferably one to two rounds.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, a web travel position detecting step for detecting a distance in a width direction from a reference position to both ends of the web in the previous stage of the step of attaching the cleaning sheet to the web, and the cleaning A quality failure position detecting step of detecting a distance in the width direction from the reference position of a quality failure formed on the web surface by the foreign matter in a subsequent stage of the step of attaching the sheet to the web; and a position where the cleaning sheet is attached Each of the detection signals detected in the web travel position detection step, the quality failure position detection step, and the pasting position detection step. On the roller side surface of the web And wherein the paste.

  According to the third aspect, the foreign matter on the roller surface can be more reliably removed in response to changes in the web width and the running position of the web. Further, the cleaning sheet can be used efficiently. Here, since the position in the width direction from the reference position to the both ends of the web is detected in the web traveling position detecting step, it is possible to grasp the web width and the traveling position of the web with respect to the roller width.

  A fourth aspect is characterized in that, in any one of the first to third aspects, the web is a product itself.

  Thereby, it is not necessary to stop the production line once, and foreign matters on the roller surface can be removed in a necessary process even during operation. Here, the product includes materials in the process of manufacturing the product.

  A fifth aspect of the present invention is characterized in that the foreign matter removing method on the roller surface according to any one of the first to fourth aspects is applied to a part of all the steps from the feeding of the web to the winding.

  Thereby, for example, foreign substances on the roller surface can be removed in a necessary process in a production line including various chemical treatment processes and heating processes as in a lithographic printing plate. Therefore, the cleaning sheet can be used efficiently, and the influence on the adhesiveness can be reduced.

  According to a sixth aspect of the present invention, in order to achieve the above object, in the foreign matter removing apparatus on the roller surface for transporting the belt-shaped web, a cleaning sheet having a width narrower than the web width and having an adhesive layer formed on both sides, A cleaning sheet attaching means for attaching to the roller side surface of the web, and a cleaning sheet attaching position moving means for moving the cleaning sheet attaching means in the width direction of the web. A foreign matter removing device for a roller surface is provided.

  Claim 6 constitutes the present invention as an apparatus. According to the sixth aspect, the cleaning sheet can be used efficiently, and adverse effects on the adhesiveness can be reduced.

A seventh aspect of the present invention is the method according to the sixth aspect, wherein the cleaning sheet attaching means includes:
An adhesive drum that holds the cleaning sheet and attaches the held cleaning sheet to the web; and is disposed to face the adhesive drum and presses the web from the back surface of the web to which the cleaning sheet is attached. The cleaning sheet attaching position moving means includes: a moving part that moves in a web width direction; and a support part that is connected to the moving part and rotatably supports the attaching drum. It is characterized by having.

  Claim 7 specifically shows a preferred apparatus configuration.

  An eighth aspect of the present invention according to claim 6 or 7, wherein a web travel position detecting means for detecting a distance in the width direction from a reference position to both ends of the web in the preceding stage of the cleaning sheet attaching means, and the cleaning sheet attaching means In the subsequent stage, quality failure position detecting means for detecting a distance in the width direction from the reference position of the quality failure formed on the web surface by the foreign matter, and the width of the cleaning sheet attaching position from the reference position And a pasting position detecting means for detecting a distance in the direction.

  According to the eighth aspect, the foreign matter on the roller surface can be more reliably removed in response to changes in the web width and the running position of the web. Further, the cleaning sheet can be used efficiently.

  According to the present invention, foreign matters on the roller surface can be efficiently removed even during the operation of the production line, and not only can the occurrence of web quality failure be reduced, but also when the web is continuously conveyed through a plurality of processes. It is possible to remove foreign matter on the roller surface in a specific process.

  Hereinafter, preferred embodiments of a roller surface foreign matter removing method and apparatus according to the present invention will be described in detail with reference to the accompanying drawings. The present invention can be applied to any process of transporting a belt-like web with a roller or the like, and is not particularly limited. In the present embodiment, an example applied to a process for producing a lithographic printing plate will be described.

  FIG. 1 is a diagram for explaining the overall configuration of a lithographic printing plate production line 10 to which a roller surface foreign matter removing apparatus according to the present invention is applied. Hereinafter, the web conveyance direction is indicated by an arrow A.

  As shown in FIG. 1, the planographic printing plate production line 10 includes a web delivery machine 12, and a belt-like aluminum web 14 is wound around the web delivery machine 12 in the form of a web roll 16. It is set. The aluminum web 14 set in the web delivery machine 12 is sent out from the web roll 16, guided by a plurality of conveying rollers 17, 17. In the surface treatment apparatus 18, a surface treatment for improving the coating property and adhesion of the photosensitive compound applied to the surface of the aluminum web 14 is performed. The surface-treated aluminum web 14 is sent to the water washing apparatus 20 where it is washed.

  The cleaned aluminum web 14 is sent to the first coating device 22 where the lower surface of the aluminum web 14 is coated. And it is sent to the 1st drying apparatus 24, a drying process is performed, and the application surface of the aluminum web 14 is dried.

  The aluminum web 14 dried by the first drying device 24 is sent to the second coating device 26. And the coating liquid for protective layers is apply | coated with the 2nd coating device 26, and a drying process is given with the 2nd drying device 28 which follows. Thus, the aluminum web 14 on which the protective layer is formed passes through the cleaning sheet sticking device 30 of the foreign matter removing device on the roller surface, which is arranged at the subsequent stage of the second drying device 28, and is fed by a plurality of transport rollers 31, 31. After being conveyed, it is wound up in the form of a web roll 34 by a web winder 32.

  The materials of the aluminum web 14 and the photosensitive layer used in this embodiment will be described later.

  FIG. 2 is a perspective view illustrating the configuration of the cleaning sheet pasting device 30 in the foreign matter removing device on the roller surface of the present embodiment. Although not shown, a case will be described in which conveying rollers 31, 31... Are arranged on the upper surface of the aluminum web 14 in the same figure.

  As shown in FIG. 2, the cleaning sheet pasting device 30 is mainly composed of a pasting drum 38 for pasting the cleaning sheet 36 on the surface (upper surface in the figure) of the aluminum web 14 that contacts the transport rollers 31, 31. A pressing roller 39 that is disposed opposite to the affixing drum 38 and that presses the aluminum web 14 from the back surface of the aluminium web 14 to which the cleaning sheet 36 is affixed, and rotatably supports and affixes the affixing drum 38. And an attaching drum moving means 42 for moving the drum 38 in the web width direction.

  The affixing drum 38 is a roll of a cleaning sheet 36 having an adhesive layer formed on both sides. The affixing drum 38 is brought into contact with the aluminum web 14 and rotated in the same direction as the conveying direction. It can be pasted. The material of the affixing drum 38 is preferably a release material, and examples thereof include polyvinyl alcohol sponge, fluororesin and the like.

  The pressing roller 39 is connected to a cylinder 43 that controls the pressure pressing the aluminum web 14 in the opposite direction via the fulcrum Q. Thereby, the pressing roller 39 is swung around the fulcrum Q by the cylinder 43, and the aluminum web 14 can be pressed with an appropriate pressure from the side opposite to the surface to which the cleaning sheet 36 is attached.

  The affixing drum 38 comes into contact with the aluminum web 14 when the pressing roller 39 pushes up the aluminum web 14, and affixes the cleaning sheet 36 to the aluminum web 14. Such an operation can be manually performed by the pasting hand valve 40, but is not limited to this, and a control unit (not shown) can be automatically operated based on a cleaning sheet pasting signal. May be.

  The adhering drum moving means 42 includes a moving belt 44 that moves in the width direction above the aluminum web 14, an adhering drum support 45 that is connected to the moving belt 44 and rotatably supports the adhering drum 38, It has. In this way, by moving the moving belt 44 in the width direction, the sticking drum 38 can be moved in the width direction according to the position of the foreign matter in a rotatable state. In addition, the rail mechanism provided with the other slide member instead of the moving belt 44 may be sufficient, and it is not limited to the said form.

  The pasting drum moving means 42 displays a moving amount display for displaying the moving amount of the pasting drum 38 based on a belt driving unit 46 that drives the moving belt 44 and a detection signal from the pasting position detecting means described later. A portion 47 is provided.

  FIG. 3 is a block diagram for explaining the foreign matter removing device 33 on the roller surface provided with the cleaning sheet attaching device 30 in the present embodiment.

  The roller surface foreign matter removing device 33 is mainly composed of a web travel position detecting means 50 for detecting the distance in the width direction from the reference position to both ends of the web, and the cleaning sheet pasting device 30 in the preceding stage of the cleaning sheet pasting device 30. In the subsequent stage, quality failure position detecting means 52 for detecting the distance in the width direction from the reference position of the quality failure formed on the web surface due to the foreign matter on the roller surface, and a pasting drum in the cleaning sheet pasting apparatus 30 And an attachment position detecting means 54 for detecting a distance in the width direction from the reference position of the 38 attachment positions.

  The web travel position detection means 50 detects the distance in the width direction from the reference position to both ends of the web, and outputs the web travel position information in the width direction before the cleaning sheet pasting device 30. Thereby, the web running position information for the web width and the roller width can be acquired. As a specific example of the web travel position detection means 50, when the object to be transported is non-transparent, a photoelectric tube type can be preferably used, and when it is transparent such as a plastic film, an ultrasonic type or an air type is used. Such detection means can be preferably used.

  The quality failure position detecting means 52 detects a quality failure that has occurred in the aluminum web 14 due to foreign matter on the roller surface in the subsequent stage of the cleaning sheet pasting device 30, and determines whether there is a failure in the roller rotation cycle, Outputs quality fault location information in the width direction.

  The affixing position detection means 54 is provided in the cleaning sheet affixing device 30, detects the amount of movement of the affixing drum 38 in the width direction, and outputs affixing position information in the width direction. Specific examples of the pasting position detecting means 54 include detecting means such as a ball screw tachometer.

  4 and 5 are schematic diagrams illustrating an example of the configuration of the cleaning sheet 36. FIG. Among these, FIG. 4 (A) and FIG. 5 (A) are the top views seen from the surface which contacts the roller surface of the cleaning sheet 36 in this embodiment, FIG. 4 (B) and FIG. It is the sectional view on the AA 'line of Drawing 4 (A) and Drawing 5 (A). In FIGS. 4 and 5, description will be made assuming that the vertical direction is the transport direction.

  As shown in FIG. 4, the cleaning sheet 36 of the present embodiment adheres to both the surface of the base sheet 56 that contacts the roller surface (the roller side surface) and the surface that is attached to the web (the web side surface). Layers 57 and 58 are formed.

  As the kind of the adhesive layers 57 and 58, natural rubber, synthetic rubber, acrylic adhesive, vinyl adhesive, silicone adhesive, or a mixture thereof is preferable. In particular, it is more preferable that the component of the adhesive layer 57 on the roller surface side of the cleaning sheet 36 has an adhesive force that is not transferred to the roller surface. In this embodiment, a commercially available adhesive tape (PP-manufactured by Kikusui Tape Co., Ltd.) is used. 60) or an adhesive having an adhesive strength equivalent to this is preferred. Said adhesive force can be evaluated by the method based on JISZ0237, for example. On the other hand, for the adhesive layer 58, it is preferable to select an adhesive depending on the type of web surface to be attached.

  The base sheet 56 for forming the adhesive layers 57 and 58 preferably has sufficient tensile strength, tear strength, folding strength, and the like. For example, fine paper, kraft paper, glassine paper, synthetic paper, aluminum foil, non-woven fabric Plastic films such as polyethylene terephthalate, polypropylene and polyethylene can be preferably used.

  The adhesive force of the entire surface of the cleaning sheet 36 mainly depends on the area where the adhesive layers 57 and 58 are formed and the type of adhesive. Here, the adhesive force of the entire surface is configured such that the web surface side> the roller surface side. Here, the ratio of the adhesive strength of the entire surface is preferably in the range of 1 / 1.5 to 1/5, and in the range of 1/2 to 1 / 3.5, on the roller surface side / web surface side. It is more preferable.

  In the present embodiment, the area where the adhesive layers on both sides of the cleaning sheet 36 are formed is preferably web surface side> roller surface side. In particular, the area ratio on which the adhesive layer is formed is preferably in the range of 1/2 to 1/5, preferably in the range of 1 / 2.5 to 1/4, on the roller surface side / web surface side. More preferred. Thereby, it can suppress that the cleaning sheet 36 peels off from a web surface, and is wound around the roller surface or an adhesive adheres.

  FIG. 4 is an example in which the width on which the adhesive layer 57 on the roller surface side is formed is narrowed, and FIG. 5 is an example in which the length of the adhesive layer 57 on the roller surface side is shortened. As shown in FIGS. 4 and 5, by adjusting the width and / or length in which the adhesive layers 57 and 58 are formed, the area in which the adhesive layers 57 and 58 are formed can be adjusted. However, the total area of the pressure-sensitive adhesive layers 57 and 58 may be adjusted by changing the shape (stripes, dots, lattices, etc.) in which the pressure-sensitive adhesive layers 57 and 58 are formed.

  In the present embodiment, the width W of the cleaning sheet 36 is preferably equal to or less than the width of the aluminum web 14. Further, the length L per cleaning sheet may be equal to or longer than one round of the outer circumference of the conveyance rollers 31, 31... To be removed, and is preferably about one or two rounds.

  In order to prevent the cleaning sheet 36 from being wound around the roller surface, the front end of the cleaning layer 36 on the roller surface side of the adhesive layer 57 in the transport direction is more than the front end of the adhesive layer 58 on the web surface side in the transport direction. It is preferable to be formed so as to be located rearward. In this case, a non-adhesive portion is formed at the front end of the cleaning sheet 36 on the roller surface side in the conveyance direction.

  In the present embodiment, the adhesive layers 57 and 58 are not formed on both ends of the conveyance direction on both surfaces of the cleaning sheet 36 so that the cleaning sheet 36 can be easily peeled off from the aluminum web 14 when collected. Not. For example, the adhesive layer 58 on the web side surface of the cleaning sheet 36 may be formed up to both ends.

  Next, processing using the roller surface foreign matter removing device 33 in this embodiment will be described with reference to FIGS.

  FIG. 6 is a schematic diagram for explaining parameters used in the processing of the present embodiment. FIG. 7 is a flow chart for explaining an example of processing using the roller surface foreign matter removing device 33 in the present embodiment. Hereinafter, FIG. 7 will be described with reference to FIG.

  First, the web travel position detecting means 50 reads the distance x1 from the reference position P to the first edge position of the web (step S1).

  Subsequently, the distance D from the first edge position of the web to the quality failure 35 'position is read by the quality failure position detecting means 52 (step S2). Then, a distance X (X = x1 + D) from the reference position P to the quality failure 35 'position is calculated (step S3).

  Next, the distance X 'from the reference position P to the attachment position of the attachment drum 38 is read by the attachment position detection means 54 (step S4). Thereafter, a difference (X′−X) between the distance X ′ from the reference position P to the pasting position and the distance X to the quality failure position is calculated, and this difference is −1 mm ≦ (X′−X) ≦ 1 mm. It is determined whether or not the above range is satisfied (step S5). If the above range is satisfied, the distance x2 from the reference position P to the second edge position of the aluminum web 14 is read (step S6).

  Next, in order to determine whether or not the distance X ′ to the attachment position is within the web width, it is determined whether or not the range of 0 ≦ (x2−X ′) is satisfied (step S7). When the above range is satisfied, a signal (M = 0) for affixing the cleaning sheet 36 to the aluminum web 14 is output to the affixing drum 38 (step S8). If the above range is not satisfied, a signal (M = 0) for attaching the cleaning sheet 36 to the aluminum web 14 is not output, and the current state is maintained.

  On the other hand, if the range of −1 mm ≦ (X′−X) ≦ 1 mm is not satisfied in step S5, it is determined whether or not the range of 0 ≦ (X′−X) is satisfied (step S9). When the above range is satisfied, since the distance X ′ to the attachment position is closer to the plus side than the distance X to the quality failure 35 ′ position, the movement signal (m2 = 0) is output (step S10).

  In step S9, if the above range is not satisfied, the distance X ′ to the attaching position is closer to the minus side than the distance X to the quality failure 35 ′ position, so the attaching drum moving means 42 is moved to the plus side. A movement signal (m1 = 0) is output (step S11).

  By processing as described above, foreign matters on the roller surface can be more reliably removed.

  Next, the operation of the foreign matter removing device 33 on the roller surface of the present embodiment in the planographic printing plate production line 10 of FIG. 1 will be described. FIG. 8 is a schematic view for explaining the operation of the foreign matter removing device 33 on the roller surface in the present embodiment.

  As shown in FIG. 1, after the aluminum web 14 on which the photosensitive layer and the protective layer are formed is unloaded from the second drying device 28, the cleaning sheet attaching device 30 (inside the foreign matter removing device 33 on the roller surface) is used. pass.

  Here, as shown in FIG. 8A, when the foreign material 35 adheres to the surface of the conveying roller 31, the surface of the aluminum web 14 is damaged by the foreign material 35, and quality failure occurs.

  In FIG. 7, when a signal (M = 0) for affixing the cleaning sheet 36 to the aluminum web 14 is output, the affixing hand valve 40 affixes the cleaning sheet 36 in the direction of arrow B as shown in FIG. 8B. The drum 38 is moved to attach the cleaning sheet 36 to the lower surface of the aluminum web 14.

  When the aluminum web 14 to which the cleaning sheet 36 is attached reaches the conveying roller 31, the foreign matter 35 on the surface of the conveying roller 31 comes into contact with the surface of the cleaning sheet 36 on which the adhesive layer 57 is formed. As a result, the foreign matter 35 is captured by the adhesive layer 57 of the cleaning sheet 36 and removed from the surface of the transport roller 31.

  The cleaning sheet 36 affixed to the aluminum web 14 passes through the surface of the transport roller 31 and is then transported to the subsequent stage, while transporting while capturing foreign matters (not shown) on the transport rollers 31, 31... The

  As described above, in a necessary process, foreign matters on the surfaces of the plurality of conveying rollers can be efficiently removed, and occurrence of web quality failure can be reduced.

  In addition, the cleaning sheet 36 that has captured the foreign matter on the surface of the transport rollers 31, 31... Can be removed and collected from the aluminum web 14 in the winding process of the aluminum web 14.

  As mentioned above, although embodiment of the foreign matter removal method and apparatus on the roller surface which concerns on this invention was described, this invention is not limited to the said embodiment, Various aspects can be taken.

  For example, in the present embodiment, the present invention is applied in the winding process after the application of the photosensitive layer of the planographic printing plate, but may be applied to other processes in the production line 10 of the planographic printing plate.

  In the present embodiment, the cleaning of the transport roller has been mainly described. However, the present invention can also be applied to cleaning of various other rollers such as a driving roller.

  The present invention can be applied not only to the manufacturing process of a lithographic printing plate but also to a process of transporting a belt-shaped web in a wide variety of other technical fields with a roller or the like. Examples of such technical fields include various film manufacturing processes such as functional films and optical films, metal foil manufacturing processes, battery electrode manufacturing processes, and the like.

  Next, the material used for this embodiment is demonstrated.

<Aluminum web>
The aluminum web 14 (hereinafter referred to as an aluminum alloy plate) used in the present embodiment is a metal whose main component is aluminum that is dimensionally stable. As the aluminum alloy plate, a plastic film or paper on which an aluminum alloy is laminated or vapor-deposited can also be used. Furthermore, a composite sheet in which an aluminum sheet is bonded to a polyethylene terephthalate film as described in Japanese Patent Publication No. 48-18327 can also be used. Further, conventionally known and used materials such as aluminum alloy plates such as JIS A1050, JIS A1100, JIS A3003, JIS A3004, JIS A3005, and internationally registered alloy 3103A can be appropriately used.

  The thickness of the aluminum alloy plate is usually about 0.05 mm to 1 mm, and preferably 0.1 mm to 0.5 mm. This thickness can be appropriately changed according to the size of the printing press, the size of the printing plate, and the user's desire.

<Photosensitive layer>
Although a photosensitive layer is not specifically limited, For example, the visible light exposure type platemaking layer exposed with normal visible light, The laser exposure type platemaking layer exposed with laser beams, such as an infrared laser beam, are mentioned. Hereinafter, the visible light exposure type plate making layer and the laser exposure type plate making layer will be described.

1) Visible light exposure type plate making layer The visible light exposure type plate making layer can be formed of a composition containing a photosensitive resin and, if necessary, a colorant and the like. Examples of the photosensitive resin include a positive photosensitive resin that dissolves in the developer when exposed to light, and a negative photosensitive resin that does not dissolve in the developer when exposed to light. Examples of the positive photosensitive resin include a combination of a diazide compound such as a quinone diazide compound or a naphthoquinone diazide compound and a phenol resin such as a phenol novolac resin or a cresol-novolak resin. Examples of the negative photosensitive resin include diazo compounds such as diazo resins (for example, condensation products of aromatic diazonium salts and aldehydes such as formaldehyde), inorganic acid salts of the diazo resins, and organic acid salts of the diazo resins. And combinations with binders such as (meth) acrylate resins, polyamide resins, polyurethane resins, vinyl polymers such as (meth) acrylate resins and polystyrene resins, and vinyl polymerizable compounds such as (meth) acrylate esters and styrene , A combination with a photopolymerization initiator such as a benzoin derivative, a benzophenone derivative, or a thioxanthone derivative.

  As the colorant, in addition to ordinary dyes, an exposure coloring dye that develops color by exposure, an exposure decoloring dye that becomes almost or completely colorless by exposure, and the like can be used. Examples of the exposure coloring dye include a leuco dye. Examples of exposure decolorizing dyes include triphenylmethane dyes, diphenylmethane dyes, oxazine dyes, xanthene dyes, iminonaphthoquinone dyes, azomethine dyes, and anthraquinone dyes.

  The visible light exposure type plate-making layer can be formed, for example, by applying a photosensitive resin solution in which the photosensitive resin and the colorant are blended in a solvent, and then drying. Examples of the solvent used in the photosensitive resin solution include a solvent that can dissolve the photosensitive resin and has a certain degree of volatility at room temperature. Specific examples include alcohol solvents, ketone solvents, ester solvents, ether solvents, glycol ether solvents, amide solvents, and carbonate esters. The coating method of the photosensitive resin solution is not particularly limited, and conventionally known methods such as a spin coating method, a wire bar coating method, a dip coating method, an air knife coating method, a roll coating method, and a blade coating method can be used.

2) Laser exposure type plate making layer Examples of the laser exposure type plate making layer include a negative type laser plate making layer in which a portion irradiated with laser light remains, a positive type laser plate making layer in which a portion irradiated with laser light is removed, and laser light. Mainly mentioned is a photopolymerization type laser plate making layer that undergoes photopolymerization when irradiated with.

  The negative type laser plate-making layer comprises (A) an acid precursor that decomposes by heat or light to generate an acid, (B) an acid precursor, (A) an acid crosslinkable compound that crosslinks by an acid generated by decomposition, (C) An alkali-soluble resin, (D) an infrared absorber, and (E) a phenolic hydroxyl group-containing compound are dissolved or suspended in a suitable solvent and formed using a negative type laser plate-making layer forming liquid. Can do.

  As an acid precursor (A), the compound which decomposes | disassembles with an ultraviolet light, visible light, or a heat | fever like an iminophosphate compound, for example is mentioned. In addition, compounds generally used as a cationic photopolymerization initiator, a radical photopolymerization initiator, a photochromic agent, and the like can also be used as the acid precursor (A). Examples of the acid crosslinkable compound (B) include an aromatic compound having at least one of an alkoxymethyl group and a hydroxyl group, a compound having an N-hydroxymethyl group, an N-alkoxymethyl group or an N-acyloxymethyl group, an epoxy Compounds. Examples of the alkali-soluble resin (C) include polymers having a hydroxyaryl group in the side chain, such as a novolak resin and poly (hydroxystyrene). As an infrared absorber (D), the dye and pigment which absorb the infrared rays with a wavelength of 760-1200 nm are mentioned, for example. Specific examples include black pigments, red pigments, metal powder pigments, phthalocyanine pigments; azo dyes, anthraquinone dyes, phthalocyanine dyes, and cyanine dyes that absorb infrared rays having the above wavelengths.

  The positive type laser plate making layer is formed by dissolving or suspending (F) an alkali-soluble polymer, (G) an alkali dissolution inhibitor, and (H) an infrared absorber in an appropriate solvent. It can be formed using a liquid. Examples of the alkali-soluble polymer (F) include phenolic polymers having a phenolic hydroxyl group such as a phenol resin, a cresol resin, a novolac resin, a pyrogallol resin, and poly (hydroxystyrene).

  Examples of the alkali dissolution inhibitor (G) include compounds that react with the alkali-soluble polymer (F) by heating or the like to reduce the alkali solubility of the alkali-soluble polymer (F). Specific examples include sulfone compounds, ammonium salts, sulfonium salts, and amide compounds. As a combination of the alkali-soluble polymer (F) and the alkali dissolution inhibitor (G), a combination of a novolak resin as the alkali-soluble polymer (F) and a cyanine dye which is a kind of sulfone compound as the alkali dissolution inhibitor (G). Preferably mentioned. Examples of the infrared absorber (H) include dyes having an absorption region in the infrared region with a wavelength of 750 to 1200 nm, such as squarylium dye, pyrylium dye, carbon black, insoluble azo dye, and anthraquinone dye, and having light / heat conversion ability. , Dyes and pigments.

  The photopolymerization type laser plate making layer can be formed by using a photopolymerization type laser plate making layer containing (I) a vinyl polymerizable compound having an ethylenically unsaturated bond at the molecular end. In the photopolymerization type laser plate making layer forming liquid, (J) a photopolymerization initiator, (K) a sensitizer, and the like can be blended as necessary. Examples of the vinyl polymerizable compound (I) include an ethylenically unsaturated carboxylic acid polyvalent ester which is an ester of an ethylenically unsaturated carboxylic acid such as (meth) acrylic acid, itaconic acid and maleic acid and an aliphatic polyhydric alcohol. Examples include esters; ethylenically unsaturated carboxylic acid polyvalent amides such as methylene bis (meth) acrylamide; xylylene (meth) acrylamide composed of the ethylenically unsaturated carboxylic acid and polyvalent amine. As a photoinitiator (J), the photoinitiator normally used for photopolymerization of a vinyl-type monomer can be used. Examples of the sensitizer (K) include titanocene compounds, triazine compounds, benzophenone compounds, benzimidazole compounds, cyanine dyes, merocyanine dyes, xanthene dyes, and coumarin dyes.

  For the application methods of the above-described negative type laser plate-forming layer forming liquid, positive type laser plate-forming layer forming solution, photopolymerization type laser plate-forming layer forming solution, etc., the solvents and the application methods mentioned above for the photosensitive resin solution can be used. .

  Next, examples will be described in detail, but the present invention is not limited to the following examples.

The roller surface foreign matter removing apparatus 33 according to the present invention was applied between the process after the photosensitive layer and protective layer of the planographic printing plate of FIG. In this example, the aluminum web 14 having a width of 1000 mm and a thickness of 0.3 mm was used. The conveyance conditions for the aluminum web 14 were a conveyance speed of 100 m / min and a tension of 1000 N / width. The cleaning sheet 36 used was as follows.
(Conditions for cleaning sheet 36)
・ Cleaning sheet size: 300mm width x 1000mm length
-Adhesive type (web side): acrylic adhesive-Adhesive strength (both sides) *: 3.43 N / cm (* Measurement method: conforms to JIS Z0237)
-Adhesive area ratio (roller side / web side): 33%
As shown in FIG. 8, after the photosensitive layer and the protective layer are applied, the cleaning sheet shown in Table 1 is applied to the roller side surface (lower surface) of the aluminum web 14 unloaded from the drying process at the same speed as the conveyance speed of the aluminum web 14. 36 was pasted. The cleaning sheet 36 was peeled off from the aluminum web 14 by the winder 32 and collected.

  Here, the case where the roller surface foreign matter removing device 33 according to the present invention is used is referred to as Example 1, and the line is stopped and the roller is cleaned by the operator as in the conventional case (the roller surface foreign matter removing device 33). Was used as Comparative Example 1, and the amount of operating loss and the amount of product loss within a certain time were measured.

表１に示されるように、本発明に係るローラ表面の異物除去装置３３を使用した実施例１では、ライン運転中においてもローラ表面を清掃することができた。また、ローラ表面の異物によって発生した製品ロスは、アルミウエブ１４の長さで１００ｍ程度にとどまった。 In this example, the operation loss amount was evaluated by the line stop time, and the product loss was evaluated by the length of the aluminum web 14 that became a defective product. The results are shown in Table 1.

As shown in Table 1, in Example 1 using the roller surface foreign matter removing device 33 according to the present invention, the roller surface could be cleaned even during line operation. Further, the product loss caused by the foreign matter on the roller surface was only about 100 m in the length of the aluminum web 14.

  On the other hand, in the conventional comparative example 1, since the line was temporarily stopped and the operator cleaned the roller surface, the line was stopped for 3 hours. Furthermore, the amount of product loss that became defective was equivalent to about 2000 m in the length of the aluminum web 14.

  As described above, in the process to which the present invention is applied, it has been found that foreign matters on the roller surface can be removed more efficiently than before, so that the operation loss can be reduced and the product loss can be remarkably reduced.

It is a figure explaining the whole structure of the manufacturing line of the planographic printing plate to which the foreign material removal apparatus on the roller surface which concerns on this invention is applied. It is a perspective view explaining the structure of the foreign material removal apparatus on the roller surface in this embodiment. It is a block diagram which shows an example of the foreign material removal apparatus system of the roller surface in this embodiment. It is a schematic diagram explaining the structure of the cleaning sheet in this embodiment. It is a schematic diagram explaining the other structure of the cleaning sheet in this embodiment. It is a model diagram explaining the parameter used for the process of this embodiment. It is a flowchart figure explaining the process of the foreign material removal apparatus on the roller surface in this embodiment. It is a schematic diagram explaining the effect | action of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Planographic printing plate production line, 14 ... Aluminum web, 17, 31 ... Conveyance roller, 30 ... Cleaning sheet sticking apparatus, 33 ... Foreign matter removal apparatus on roller surface, 32 ... Web winder, 36 ... Cleaning sheet, 38 ... sticking drum, 39 ... pressing roller, 40 ... sticking hand valve, 42 ... sticking drum moving means, 43 ... cylinder, 44 ... moving belt (moving part), 45 ... sticking drum supporting part (supporting part) ), 46... Belt driving section, 47... Movement amount display section, 50... Web running position detection means, 52... Quality failure position detection means, 54. )) Adhesive layer, 58... (Web surface side) Adhesive layer, 35... Foreign matter (on the roller surface), 35 ′ ... Quality failure (on the web surface)

Claims (8)

  In a method for removing foreign matter from a roller surface that conveys a belt-shaped web, a cleaning sheet having an adhesive layer formed on both sides is attached to the roller side surface of the web, and the web is conveyed while being in contact with the roller. The foreign matter on the roller surface is captured by the cleaning sheet.   2. The method for removing foreign matter on a roller surface according to claim 1, wherein, of both surfaces of the cleaning sheet, the adhesive force of the entire surface to be attached to the web is larger than the adhesive force of the entire surface contacting the roller surface. A web running position detecting step for detecting a distance in a width direction from a reference position to both ends of the web in a previous stage of the step of attaching the cleaning sheet to the web;
A quality failure position detection step of detecting a distance in the width direction from the reference position of the quality failure formed on the web surface by the foreign matter in a subsequent stage of the step of attaching the cleaning sheet to the web;
A pasting position detecting step for detecting a distance in the width direction from the reference position of the pasting position of the cleaning sheet,
The cleaning sheet is attached to the roller side surface of the web based on the detection signals detected in the web running position detection step, the quality failure position detection step, and the attachment position detection step. The method for removing foreign matter on the roller surface according to claim 1 or 2.   The method for removing foreign matter on a roller surface according to any one of claims 1 to 3, wherein the web is a product itself.   5. The method for removing foreign matter on a roller surface according to claim 1, wherein the method for removing foreign matter on the roller surface according to any one of claims 1 to 4 is applied to a part of all the steps from sending out the web to winding. In the foreign matter removing device on the roller surface that conveys the belt-shaped web,
A cleaning sheet affixing means for affixing a cleaning sheet having a width narrower than the web width and having an adhesive layer formed on both sides to the roller side surface of the web;
Cleaning sheet attaching position moving means for moving the cleaning sheet attaching means in the width direction of the web;
An apparatus for removing foreign matter from a roller surface, comprising: The cleaning sheet attaching means includes
An affixing drum for holding the cleaning sheet and affixing the held cleaning sheet to the web;
A pressing roller that is disposed facing the pasting drum and presses the web from the back surface of the web to which the cleaning sheet is pasted.
The cleaning sheet attaching position moving means includes:
A moving part that moves in the web width direction;
The apparatus for removing foreign matter on a roller surface according to claim 6, further comprising: a support portion connected to the moving portion and rotatably supporting the sticking drum. A web running position detecting means for detecting a distance in the width direction from the reference position to both ends of the web in the previous stage of the cleaning sheet attaching means,
Quality failure position detection means for detecting a distance in the width direction from the reference position of the quality failure formed on the web surface by the foreign matter at a subsequent stage of the cleaning sheet attaching means;
The apparatus for removing foreign matter on a roller surface according to claim 6 or 7, further comprising affixing position detecting means for detecting a distance in a width direction of the cleaning sheet adhering position from the reference position.

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