JP2008247526A - Web machining line - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a web machining line capable of eliminating a part of a web, in which a defective marking is given, and a part thereof, to which a defective marking is probably transferred, from a product. <P>SOLUTION: This web machining line comprises a web delivery section 2, a cutter 10, a CCD camera 6 for detecting a defective marking M on a lithographic printing precursor web W, a NG gate 18 for sorting the lithographic printing precursors obtained by cutting the lithographic printing precursor web W by the cutter 10 into good products and defective products, and a tracking control computer 32. When the CCD camera 6 detects a defective marking M, the tracking control computer 32 virtually determines that a virtual defective marking M is given to the upstream side of the defective marking M along the feeding direction by one lap of a coil 200, and the lithographic printing precursor P including parts of the lithographic printing precursor web W, to which a defective marking M and a virtual defective marking m are given, is eliminated as a defective product. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a web processing line, and more particularly, to a web processing line that is cut into a predetermined size while a web wound in a coil shape is rewound to form a sheet.

  In a lithographic printing plate production line, a lithographic printing plate is usually produced by cutting and cutting a lithographic printing plate web into predetermined dimensions. In the production line, if there is a defective portion in the lithographic printing original web, it is necessary to surely eliminate the lithographic printing original plate having a defective portion so that the defective portion does not enter the lithographic printing original plate as a product. .

  Therefore, a defect marking system is provided in the production line, and a defective lithographic printing plate web is detected in the defect marking system to attach a defective marking, and a lithographic printing original plate obtained by cutting and cutting the defective marking portion is provided. Sorted as defective.

  In recent years, the line speed of a production line has been increased, and a marking apparatus for attaching a defect marking to a lithographic printing original web in a defect marking system is required to be capable of marking with high positional accuracy.

  Furthermore, in the production line, after detecting and marking defects in the lithographic printing original web, the lithographic printing original web is temporarily wound into a coil shape, and then cut and cut into a predetermined dimension while rewinding the coil in a subsequent process. To collect and package.

Therefore, in the marking device,
・ Prevent label and other foreign matter from entering the lithographic printing plate
・ Baking gas is not generated when marking on the surface on which the plate-making layer is formed,
・ No burrs, protrusions, or thickness changes occur when marking on the surface where the plate-making layer is not formed, and no secondary failure occurs when wound on the coil again. It is required to be able to discriminate reliably. As a marking device that satisfies such conditions, there are, for example, inkjet marking devices (Patent Documents 1 to 5).

  Further, among the ink-jet type marking devices, a continuous circulation type using a quick-drying ink is preferably used so that the defect marking attached to the lithographic printing original web does not adhere to the conveying roller that conveys the lithographic printing original web. .

  However, in a continuous circulation type marking device, it is not possible to completely exclude ejection of ink at an unintended timing due to reasons such as splashing of quick-drying ink, and therefore the surface on the side where the plate-making layer is not formed It is common to mark

In addition, the following conditions apply to fast-drying inks:
-Dried ink must withstand contact and rubbing with the transport roller,
-Ink does not transfer to the surface on which the plate-making layer is formed due to the pressure by the winding tension when winding the lithographic printing plate web around the coil,
-During storage of the coil on which the lithographic printing original web is wound, the ink should not be transferred to the surface on which the plate-making layer is formed,
A material satisfying that the plate-making layer does not change in quality due to components in ink and residual volatile components during storage of the coil wound with the lithographic printing original web is selected.
JP 2004-125493 A JP 2004-125485 A JP 2004-144556 A Japanese Patent Laid-Open No. 2004-237682 Japanese Utility Model Publication No. 5-009898 (full application of Japanese Patent Application No. 4-048090)

  However, even when an ink that satisfies all of these conditions is used as a quick-drying ink, depending on the type of the lithographic printing original plate, it is completely impossible to avoid transferring the ink to the plate making layer when winding the coil or storing it. It was not possible. Further, even when the storage period after being wound on the coil is long, it cannot always be guaranteed that the ink is not transferred to the plate making layer.

  The present invention has been made to solve the above problems, and is a web processing line that is cut into a predetermined dimension while rewinding a web such as a lithographic printing original web wound in a coil shape to obtain a sheet. The present invention has an object to provide a web processing line capable of excluding not only a portion having a defect marking in the web but also a portion to which the defect marking may be transferred from a product.

  According to the first aspect of the present invention, there is provided a web feeding section that feeds a coil around which a web that is a belt-like body is wound in a predetermined direction while rewinding, and a sheet that is cut and / or cut into a predetermined dimension to form a sheet. Obtained by cutting the web with a cutting part, a defect marking detecting part for detecting a defect marking attached to the web to indicate the position of the defective part when the web has a defective part, and the cutting part. A web processing line comprising: a defective product sorting unit that sorts the formed sheet into a non-defective product and a defective product; and a control unit that controls the web sending unit, the cutting unit, the defect marking detection unit, and the defective product sorting unit The defect marking detection unit detects the defect marking on the surface of the web facing the inside of the coil, and the control unit When the defect marking detection unit detects the defect marking, it is assumed that the virtual defect marking is also attached to the upstream side along the delivery direction from the defect marking by one turn of the coil, and the web The sheet including the part with the defect marking and the virtual defect marking is excluded as a defective product.

  The web processing line according to claim 1 is a line that unwinds and cuts and cuts the coil wound so that the surface with the defect marking on the web is on the inner side to form a sheet.

  In the coil, the portion with the defect marking on the web is opposed to the portion located on the inner side of the coil, so that the defect marking is transferred to the portion located on the inner side of the sheet.

  Therefore, when the coil is rewound, the portion where the defect marking is transferred is sent out after the portion with the defect marking. The distance between the portion where the defect marking is transferred and the portion where the defect marking is attached corresponds to one turn of the coil.

  Therefore, in the web processing line, it is assumed that the defect marking is transferred upstream of the defect marking along the delivery direction by one turn of the coil, and the virtual defect marking is given. Then, by eliminating the sheet including the defect marking actually detected and the portion with the virtual defect marking as a defective product, not only the sheet including the defective portion but also the defect marking may be transferred. Eliminate sheets.

  According to a second aspect of the present invention, there is provided a web feeding section that feeds a coil around which a web that is a belt-like body is wound, in a predetermined direction, and cuts the web into a predetermined dimension and / or cuts into a sheet. Obtained by cutting the web with a cutting part, a defect marking detecting part for detecting a defect marking attached to the web to indicate the position of the defective part when the web has a defective part, and the cutting part. A web processing line comprising: a defective product sorting unit that sorts the formed sheet into a non-defective product and a defective product; and a control unit that controls the web sending unit, the cutting unit, the defect marking detection unit, and the defective product sorting unit The defect marking detection unit detects defect marking on a surface of the web facing the outside of the coil, and the control unit detects the defect mark. When the winding detection unit detects a defect marking, it is assumed that a virtual defect marking is attached to the downstream side of the coil along the delivery direction from the defect marking by one turn of the coil. A sheet including a defect marking and a portion with the virtual defect marking is excluded as a defective product.

  The web processing line according to claim 2 is a line that unwinds and cuts and cuts the coil wound so that the surface on which the defect marking of the web is attached is on the outside.

  In the coil, the portion with the defect marking on the web is opposed to the portion located on the outside of the sheet in the coil, so that the defect marking is transferred to the portion located on the outside of the sheet.

  Therefore, when the coil is rewound, the portion where the defect marking is transferred is sent out one turn of the coil ahead of the portion with the defect marking.

  Therefore, in the web processing line, it is assumed that the defect marking has been transferred downstream of the defect marking along the delivery direction by one turn of the coil, and the virtual defect marking is given. Then, by eliminating the sheet including the defect marking actually detected and the portion with the virtual defect marking as a defective product, not only the sheet including the defective portion but also the defect marking may be transferred. Eliminate sheets.

  According to a third aspect of the present invention, in the web processing line according to the first or second aspect, the defect marking detection unit detects a defect marking on both sides of the web, and the defect marking detection unit is the web. When the first defect marking is detected on the surface facing the inside of the coil in the web and the second defect marking is detected on the surface facing the outside of the coil in the web, the control unit A first virtual defect marking is attached upstream of the first defect marking along the delivery direction by one turn, and in the delivery direction by more than one turn of the second coil than the defect marking. The second virtual defect marking on the downstream side along the second virtual defect marking, and the first and second defect markings on the web and the A sheet containing the first and second virtual defect marking is subjected part, characterized in that excluded as defective.

  The web processing line according to claim 3 is intended for a web with defect markings on both sides.

  In the web, the defect marking attached to the surface facing the inside of the coil is transferred upstream along the web feeding direction, and the defect marking attached to the surface facing the outside of the coil is Transferred downstream along the web feeding direction.

  Therefore, in the web processing line, it is assumed that virtual defect markings are also attached to the upstream side and the downstream side along the delivery direction from the position of the actually detected defect marking, thereby including a defective part. As well as sheets that may have transferred defect markings to one side and sheets that may have transferred defect markings to the other side.

  According to a fourth aspect of the present invention, in the web processing line according to any one of the first to third aspects, the defect marking detection unit optically detects a defect marking attached by an ink jet type marking device. It is characterized by doing.

  According to a fourth aspect of the present invention, the defect marking detector optically detects the defect marking attached by the ink jet type marking device. Therefore, the defect marking can be detected without contact. Thus, the web is not mechanically damaged when detecting defect markings.

  The invention according to claim 5 is the lithographic printing original web in which the web processing line according to any one of claims 1 to 4 is formed by forming a plate-making layer on one side or both sides of an aluminum support web. It is characterized by being.

  According to the web processing line according to claim 5, not only the lithographic printing original plate including the defective part, but also the lithographic printing in which the defect marking may be transferred to the surface on which the plate making layer is formed or the opposite surface. The original version can also be eliminated.

  As described above, according to the present invention, in a web processing line in which a web wound in a coil shape is rewound and cut into a predetermined size and cut into a sheet-like product, defect marking on the web is added. A web processing line can be provided in which not only the portion that has been removed but also the portion that may have been transferred by the defect marking can be excluded from the product.

1. Embodiment 1
Hereinafter, an example of the web processing line of the present invention will be described. The web processing line 100 according to the first embodiment is cut while being fed along the feeding direction indicated by the arrow a while rewinding the coil 200 around which the lithographic printing original web W is wound so that the plate-making layer p faces outward. The line is a sheet-like lithographic printing original plate P. The defect marking M indicating the defective portion of the lithographic printing original web W is attached to the surface of the lithographic printing original web W opposite to the side on which the plate-making layer p is formed, in other words, the surface facing the inside of the coil 200. .

  As shown in FIG. 1, the web processing line 100 includes a web sending unit 2 that unwinds the coil 200 from the upstream side along the sending direction a and sends out the lithographic printing original web W along the sending direction a, and web sending. A group of transport rollers 4 for transporting the lithographic printing original web W delivered from the section 2, and a side provided with a plate making layer p in the lithographic printing original web W provided below the transport path of the lithographic printing original web W; Irradiates the area to be photographed by the CCD camera 6 as a defect marking detection unit for imaging the opposite side, that is, the side with the defect marking, and the side surface of the lithographic printing original web W. An infrared light source 8 that is positioned downstream of the conveyance roller 4, the CCD camera 6, and the infrared light source 8 along the sending direction a, and extends the lithographic printing original web W in the width direction. And a cutter 10 as a cutting part to be a lithographic printing original plate P of a predetermined size, and positioned downstream of the cutter 10 along the sending direction a, and the lithographic printing original plate P is moved along the sending direction a Conveying conveyors 12 and 14 to be sent to the stacking process, and NG cans 16 as defective product sorting units that are located below the transporting conveyors 12 and 14 and store NG products that are defective products of the lithographic printing original plate P, and An NG gate which is located between the conveyors 12 and 14 and guides a non-defective product among the lithographic printing original plates P conveyed by the conveyor 12 to the conveyor 14 and an NG product to the NG can 16. 18. In the vicinity of the web sending unit 2, a diameter measuring unit 20 for optically measuring the diameter R of the coil 200 being rewound is provided. One of the transport rollers 4 is provided with a pulse generator 21.

  The web processing line 100 further controls the infrared light source 8 and processes an image signal from the CCD camera 6, a cutter 10 based on an image signal processed by the image processing computer 30, and the like. And a tracking control computer 32 as a control unit for controlling the NG gate 18. A pulse from the pulse generator 21 is input to the tracking control computer 32, and a measurement result of the diameter of the coil 200 in the diameter measuring unit 20 is also input.

Hereinafter, the operation of the web processing line 100 will be described.
When the coil 200 is mounted on the coil rewinding unit 2 and sent out along the sending direction a, the diameter measuring unit 20 starts measuring the diameter of the coil 200, and the measurement result is input to the tracking control computer 32. A pulse from the pulse generator 21 is also input to the tracking control computer 32. The tracking control computer 32 performs tracking on the virtual path based on the input pulse.

  In the CCD camera 6, imaging of the surface of the lithographic printing original web W opposite to the side on which the plate making layer P is formed, that is, the surface on which the defect marking M is attached is started, and the image signal is converted into an image processing computer. Enter 30. In the image processing computer 30, the input image signal is processed and input to the tracking control computer 32. The tracking control computer 32 determines whether the captured image is a defect marking M based on the input image signal.

  Here, in this embodiment, as described above, the defect marking M is attached to the surface on the opposite side to the side on which the plate-making layer p of the planographic printing original web W is formed. It faces the inside of the coil 200. Accordingly, as shown in FIG. 5A, it is considered that the defect marking M is transferred to the surface facing the inside of the coil 200 at the portion located inside one of the lithographic printing original webs W. A region considered to be transferred by the defect marking M is indicated by a dotted line as a virtual defect marking m. Therefore, as shown in FIG. 6A, the virtual defect marking m is positioned upstream of the defect marking M with respect to the sending direction a by a length 2π (R−2t) of one turn of the coil 200. To do. Here, t represents the thickness of the lithographic printing original web W.

  Therefore, when the tracking control computer 32 determines that the input image is the defect marking M, a defect position flag F indicating the position of the defect marking M is set on the virtual path as shown in FIG. At the same time, the virtual defect flag f indicating the position of the virtual defect marking m is set on the upstream side with respect to the sending direction a by a length 2π (R−2t) corresponding to one turn of the coil 200. Here, R is a coil diameter obtained by correcting the measured value in the diameter measuring unit 20 by the path length of the lithographic printing original web from the coil rewinding unit 2 to the CCD camera 6. Then, when it is determined whether the captured image is the defect marking M, the defect position flag F corresponding to the defect marking M and the virtual defect position flag f corresponding to the virtual defect marking m are set on the virtual path, The defect position flag F and the virtual defect position flag f are shifted on the virtual path in accordance with the timing at which the lithographic printing plate web is sent out, and at the same time, the lithographic printing original web W is cut by controlling the cutter 10 at a predetermined timing. The planographic printing original plate P is assumed. At the same time, it is determined from the positions of the defect position flag F, the virtual defect position flag f, and the cutter 10 on the virtual path whether the cut lithographic printing original plate P includes the defect marking M or the virtual defect marking m. When it is determined that the defect marking M or the virtual defect marking m is included, the NG gate 18 is raised from the position indicated by the two-dot difference line in FIG. 1 to the position indicated by the solid line. When the NG gate 18 is raised, the lithographic printing original plate P that has been discharged to the stacking process by the conveyor 14 until then is guided to the NG can 16 as an NG product. Thereby, the lithographic printing original plate P including the defect marking M and the lithographic printing original plate P including the virtual defect marking m are excluded as NG products.

2. Embodiment 2
Another example of the web processing line of the present invention will be described. Similarly to the web processing line according to the first embodiment, the web processing line 102 according to the second embodiment rewinds the coil 200 on which the lithographic printing original web W is wound so that the plate-making layer p faces outward, while the arrow a It is a line which cut | disconnects and sends out along the sending direction shown by the sheet-like lithographic printing original plate P. FIG. However, contrary to the first embodiment, the defect marking M indicating the defective portion of the lithographic printing original web W faces the surface of the lithographic printing original web W on which the plate-making layer p is formed, in other words, faces the outside of the coil 200. It is attached to the surface.

  Therefore, in the web processing line 102, as shown in FIG. 2, the CCD camera 6 and the infrared light source 8 are used for lithographic printing so that the surface of the lithographic printing original web W on which the plate making layer p is formed can be imaged. It is provided above the transport path of the original web W. In FIG. 2, the same reference numerals as those in FIG. 1 denote the same components as those shown in FIG. 1 unless otherwise specified.

  Except for these points, the web processing line 102 has the same configuration as the web processing line according to the first embodiment.

  Hereinafter, the operation of the web processing line 102 will be described. The operation from when the coil 200 is mounted on the coil rewinding unit 2 and sent out along the sending direction a to when the tracking control computer 32 forms a virtual path of the lithographic printing original web W will be described in the first embodiment. That's right.

  In the CCD camera 6, imaging of the surface of the planographic printing original web W on which the plate making layer P is formed, that is, the surface on which the defect marking M is attached is started, and an image signal is input to the image processing computer 30. . In the image processing computer 30, the input image signal is processed and input to the tracking control computer 32. The tracking control computer 32 determines whether or not the image is a defect marking M based on the processed image signal.

  Here, in the present embodiment, the defect marking is attached to the surface on which the plate making layer P is formed, and the surface faces the outside of the coil 200. Therefore, as shown in FIG. 5B, it is considered that the defect marking M is transferred to the surface facing the inside of the coil 200 in the portion located outside one sheet of the lithographic printing original web W. A region where the defect marking M is considered to be transferred is indicated by a dotted line as a virtual defect marking m ′. Therefore, the virtual defect marking m ′ is positioned downstream of the defect marking M along the delivery direction a by a length 2πR of one turn of the coil 200 as shown in FIG. 6B. Note that R is a coil diameter obtained by correcting the measured value in the diameter measuring unit 20 by the path length of the lithographic printing original web from the coil rewinding unit 2 to the CCD camera 6 as described in the first embodiment. is there.

  Therefore, when the tracking control computer 32 determines that the input image is the defect marking M, as shown in FIG. 6B, a defect position flag F indicating the position of the defect marking M is set on the virtual path. At the same time, the virtual defect flag f ′ indicating the position of the virtual defect marking m ′ is set on the downstream side along the sending direction a by the length 2πR of one turn of the coil 200.

  Then, the defect position flag F and the virtual defect position flag f are shifted on the virtual path in accordance with the timing at which the lithographic printing plate web is sent out, and at the same time, the lithographic printing original web W is cut by controlling the cutter 10 at a predetermined timing. The planographic printing original plate P is used. At the same time, it is determined from the positions of the defect position flag F, the virtual defect position flag f, and the cutter 10 on the virtual path whether the cut lithographic printing original plate P includes the defect marking M or the virtual defect marking m. . When it is determined that the defect marking M or the virtual defect marking m is included, the lithographic printing original plate P including the defect marking M and the lithographic printing original plate P including the virtual defect marking m ′ according to the procedure described in the first embodiment. Is guided to the NG can 16 as an NG product.

3. Embodiment 3
Another example of the web processing line of the present invention will be described. Similarly to the web processing line according to the first embodiment, the web processing line 104 according to the third embodiment rewinds the coil 200 around which the lithographic printing original web W is wound so that the plate-making layer p faces outward, while the arrow a It is a line which cut | disconnects and sends out along the sending direction shown by the sheet-like lithographic printing original plate P. FIG. However, unlike Embodiment 1, the defect marking M indicating the defective portion of the lithographic printing original web W is attached to both sides of the lithographic printing original web W.

  In the web processing line 104, as shown in FIG. 3, the CCD camera 6 and the infrared light source 8 are located below and above the transport path of the lithographic printing original web W so that both sides of the lithographic original printing web W can be imaged. Is provided. In FIG. 3, the same reference numerals as those in FIG. 1 denote the same components as those shown in FIG. 1 unless otherwise specified. In the following description, the CCD camera 6 and the infrared light source 8 that are positioned below the transport path are referred to as the CCD camera 6A and the infrared light source 8A, respectively, and those that are positioned below the transport path are respectively the CCD camera 6B. And an infrared light source 8B.

  Except for these points, the web processing line 104 has the same configuration as the web processing line according to the first embodiment.

  Hereinafter, the operation of the web processing line 104 will be described. The operation from when the coil 200 is mounted on the coil rewinding unit 2 and sent out along the sending direction a to when the tracking control computer 32 forms a virtual path of the lithographic printing original web W will be described in the first embodiment. That's right.

  From the CCD camera 6A, image data indicating an image of the surface opposite to the plate-making layer p of the lithographic printing original web W is obtained. From the CCD camera 6B, the surface on the side where the plate-making layer p of the lithographic printing original plate W is formed. The image data indicating the image is input to the image processing computer 30. In the image processing computer 30, these image data are processed and input to the tracking control computer 32.

  The tracking control computer 32 determines whether the image captured by the CCD cameras 6A and 6B is the defect marking M based on the input image processing data. When it is determined that the image captured by the CCD camera 6A is the defect marking M, the defect position flag F and the virtual defect position flag f are set on the virtual path by the procedure described in the first embodiment, and the CCD camera 6B is used. When it is determined that the captured image is the defect marking M, the defect position flag F and the virtual defect position flag f ′ are set on the virtual path according to the procedure described in the second embodiment. Then, based on the positions of these flags, the cutter 10 and the NG gate 18 are controlled to classify the non-defective product and the NG product. On the other hand, when the CCD cameras 6A and 6B both detect the defect marking M, the defect position flag F is set on the virtual path as shown in FIG. The virtual defect flag f is set 2π (R−2t) upstream, and the virtual defect flag f ′ is set 2πR downstream from the defect position flag F in the sending direction a. Note that R is a coil diameter obtained by correcting the measured value in the diameter measuring unit 20 by the path length of the lithographic printing original web from the coil rewinding unit 2 to the CCD camera 6 as described in the first embodiment. is there. Then, the lithographic plate including the defect marking M, the virtual defect marking m, and the virtual defect marking m ′ by controlling the cutter 10 and the NG gate based on the positions of the defect position flag F, the virtual defect flag f, and the virtual defect flag f ′. The printing original plate P is guided to the NG can 16 as an NG product.

4). Embodiment 4
Hereinafter, still another example of the web processing line of the present invention will be described. Similarly to the web processing line according to the first embodiment, the web processing line 106 according to the fourth embodiment rewinds the coil 200 around which the lithographic printing original web W is wound so that the plate-making layer p faces outward, while the arrow a It is a line which cut | disconnects and sends out along the sending direction shown by the sheet-like lithographic printing original plate P. FIG. The defect marking M indicating the defective portion of the lithographic printing original web W is attached to the surface of the lithographic printing original web W opposite to the side on which the plate-making layer p is formed, in other words, the surface facing the inside of the coil 200. .

  As shown in FIG. 4, the web processing line 106 is positioned below the transport path of the lithographic printing original web W, and a CCD camera 61 that images the surface of the lithographic printing original web W on which the defect marking M is formed, 62 is provided. The CCD camera 62 is provided on the downstream side of the CCD camera 61 along the sending direction a. The distance between the CCD cameras 61 and 62 is set to be equal to the distance between the cutter 10 and an NG product sensor 17 described later.

  Further, a backup optical sensor 7 is provided upstream of the CCD cameras 61 and 62 with respect to the sending direction a, and an NG product sensor 17 is provided in the NG can 16 to detect that an NG product has been introduced. ing.

  In addition to the image processing computer 30 and the tracking control computer 32, a tracking sheet monitoring computer 34 is also provided. In FIG. 4, the same reference numerals as those in FIG. 1 denote the same components as those shown in FIG. 1 unless otherwise specified. A signal from the NG product sensor 17 is input to the tracking sheet monitoring computer 34.

  The image signal captured by the CCD camera 61 is processed by the image processing computer 30 and then input to the tracking control computer 32. On the other hand, the image signal captured by the CCD camera 62 is processed by the image processing computer 30 and then input to the tracking sheet monitoring computer 34.

  Except for these points, the web processing line 106 has the same configuration as the web processing line according to the first embodiment.

  Hereinafter, the operation of the web processing line 106 will be described.

  After the coil 200 is mounted on the coil rewinding unit 2 and fed out in the feeding direction a, the lithographic printing original web W is fed from the coil rewinding unit 2 and cut by the cutter 10 in the tracking control computer 32. The operation up to the formation of the virtual path is as described in the first embodiment.

  In the CCD cameras 61 and 62, the surface of the lithographic printing original web W opposite to the side on which the plate-making layer P is formed, that is, the surface on which the defect marking M is attached is imaged, and the image signal is converted into an image processing computer. Enter 30. In the image processing computer 30, the image signals input from the CCD cameras 61 and 62 are processed, and the signal from the CCD camera 61 is input to the tracking control computer 32 and the signal from the CCD camera 62 is input to the tracking sheet monitoring computer 34. .

  In the tracking control computer 32, as described in the first embodiment, it is determined whether or not the captured image is the defect marking M based on the input image signal. Then, when it is determined whether the captured image is the defect marking M, the defect position flag F corresponding to the defect marking M and the virtual defect position flag f corresponding to the virtual defect marking m are set on the virtual path, The defect position flag F and the virtual defect position flag f are shifted on the virtual path in accordance with the timing at which the lithographic printing plate web is sent out, and at the same time, the lithographic printing original web W is cut by controlling the cutter 10 at a predetermined timing. The planographic printing original plate P is assumed. At the same time, it is determined from the positions of the defect position flag F, the virtual defect position flag f, and the cutter 10 on the virtual path whether the cut lithographic printing original plate P includes the defect marking M or the virtual defect marking m, If it is determined that it is contained, the lithographic printing original plate P is excluded as an NG product.

  On the other hand, the tracking sheet monitoring computer 34 also forms a virtual path of the lithographic printing original web W in the same manner as the tracking control computer 32 and determines whether or not the image captured based on the input image signal is the defect marking M. judge. Then, when it is determined whether the captured image is the defect marking M, the defect position flag F corresponding to the defect marking M and the virtual defect position flag f corresponding to the virtual defect marking m are set on the virtual path, The defect position flag F and the virtual defect position flag f are shifted so as to be synchronized with the tracking control computer 32 on the virtual path. Then, the lithographic printing plate precursor detected as the NG product from the timing when the signal indicating that the NG product is detected is input from the NG product sensor 17 and the positions of the defect position flag F and the virtual defect position flag f on the virtual path. It is determined whether or not P is actually provided with the defect marking M or the virtual defect marking m, and the determination result is compared with the determination result of the planographic printing original plate P in the tracking control computer 32. When the two determination results match, the tracking control computer 32 continues the operation of the web processing line 106 based on an instruction from the tracking sheet monitoring computer 34. On the other hand, when the judgment results of the two do not match, there is a possibility that the lithographic printing original plate P to which the defect marking M or the virtual defect marking m is attached has not been put into the NG can 16 and has flowed into the accumulation process, and the opposite Since the lithographic printing original plate P without the defect marking M and the virtual defect marking m attached to the NG can 16 is considered to have been put into the NG can 16 without flowing into the accumulation process, the tracking control computer 32 Then, the web processing line 106 is stopped by an instruction from the tracking sheet monitoring computer 34.

  The web processing line 106 can exclude the lithographic printing original plate P, which is an NG product, with higher reliability compared to the web processing lines of the first to third embodiments.

  In addition to the production of lithographic printing plates of photosensitive type, thermal type, and laser exposure type, the present invention includes metal sheets such as aluminum sheets, stainless steel sheets, ordinary steel sheets, and high-tensile steel sheets, painted iron plates, various plastic sheets, It can also be used to produce sheet-like materials such as paper.

FIG. 1 is an explanatory diagram illustrating an overall configuration of a web processing line according to the first embodiment. FIG. 2 is an explanatory diagram showing the overall configuration of the web processing line according to the second embodiment. FIG. 3 is an explanatory diagram illustrating an overall configuration of a web processing line according to the third embodiment. FIG. 4 is an explanatory diagram illustrating an overall configuration of a web processing line according to the fourth embodiment. FIG. 5 is an explanatory diagram showing a relationship between a surface on which a defect marking is provided in the lithographic printing original web and a position where the defect marking is transferred when the lithographic printing original web is wound around a coil. FIG. 6 shows the positions of defect marking and virtual defect marking on the lithographic printing original web in the web processing lines of Embodiments 1 to 3, and the defect position flag and virtual defect position flag on the virtual path corresponding to the lithographic printing original web. It is explanatory drawing which shows the relationship. FIG. 7 shows the positions of defect marking and virtual defect marking on the lithographic printing original web in the web processing line of Embodiment 4, and the defect position flag and virtual defect position flag on the virtual path corresponding to the lithographic printing original web. It is explanatory drawing which shows a relationship.

Explanation of symbols

2 Coil rewinding unit 6 CCD camera 6A CCD camera 6B CCD camera 8 Infrared light source 8A Infrared light source 8B Infrared light source 10 Cutter 12 Conveying conveyor 14 Conveying conveyor 16 NG can 17 NG product sensor 18 Gate 20 Diameter measuring unit 30 Image processing Computer 32 Tracking control computer 34 Tracking sheet monitoring computer 61 CCD camera 62 CCD camera 100 Web processing line 102 Web processing line 104 Web processing line 106 Web processing line 200 Coil

Claims (5)

A web delivery unit that sends out a coil wound around a web that is a belt-like body in a predetermined direction while rewinding the coil;
A cutting and cutting unit that cuts and / or cuts the web into a predetermined dimension;
A defect marking detector for detecting a defect marking attached to the web to indicate the position of the defect when the web has a defect,
A defective product sorting unit that sorts the sheet obtained by cutting the web with the cutting unit into a non-defective product and a defective product;
A control unit for controlling the web sending unit, the cutting unit, the defect marking detection unit, and the defective product sorting unit;
The defect marking detection unit performs detection of defect marking on the surface of the web facing the inside of the coil,
When the defect marking detection unit detects a defect marking, the control unit is also provided with a virtual defect marking on the upstream side along the delivery direction from the defect marking by one turn of the coil. The web processing line is characterized in that a sheet including the defect marking of the web and a portion with the virtual defect marking is excluded as a defective product. A web delivery unit that sends out a coil wound around a web that is a belt-like body in a predetermined direction while rewinding the coil;
A cutting and cutting unit that cuts and / or cuts the web into a predetermined dimension;
A defect marking detector for detecting a defect marking attached to the web to indicate the position of the defect when the web has a defect,
A defective product sorting unit that sorts the sheet obtained by cutting the web with the cutting unit into a non-defective product and a defective product;
A control unit for controlling the web sending unit, the cutting unit, the defect marking detection unit, and the defective product sorting unit;
The defect marking detection unit detects a defect marking on the surface of the web facing the outside of the coil,
When the defect marking detection unit detects a defect marking, the control unit is provided with a virtual defect marking on the downstream side in the delivery direction from the defect marking by one turn of the coil. A web processing line characterized in that a virtual processing sheet is excluded as a defective product including the defect marking and the virtual defect marking portion of the web. The defect marking detection unit performs detection of defect markings on both sides of the web,
The controller is
When the defect marking detection unit detects a first defect marking on the surface of the web facing the inside of the coil, and detects a second defect marking on the surface of the web facing the outside of the coil, A first virtual defect marking is attached upstream of the first defect marking along the delivery direction by one turn of the coil, and the defect marking is more than the defect marking by one turn of the second coil. Assuming that the second virtual defect marking is also attached to the downstream side along the delivery direction,
The web processing line according to claim 1 or 2, wherein a sheet including the first and second defect markings of the web and a portion with the first and second virtual defect markings is excluded as a defective product.   The said defect marking detection part is a web processing line of any one of Claims 1-3 which optically detects the defect marking attached | subjected by the inkjet-type marking apparatus.   The web processing line according to any one of claims 1 to 4, wherein the web is a lithographic printing plate web in which a plate-making layer is formed on one side or both sides of an aluminum support web.

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