TW201837456A - Defect marking method and defect marking apparatus, manufacturing method of raw material and raw material, and manufacturing method of sheet and sheet - Google Patents

Abstract

An objective of the present invention is to provide a defect marking method suitable for marking the position of a defect. A defect marking method of the present invention performs defect inspection of an object-to-be-inspected, and applies marking to a defect portion of the object-to-be-inspected based on the result of the defect inspection, wherein a first print pattern PT1 and a second print pattern PT2 are printed on a surface of the object-to-be-inspected such that a defect D is positioned between the first print pattern PT1 and the second print pattern PT2 which are adjacent to each other in another in-plane direction intersecting with one in-plan direction of the object-to-be-inspected, thereby marking the position of the defect D.

Description

   Defect marking method and defect marking device, raw material manufacturing method and raw material, and sheet manufacturing method and sheet   

The present invention relates to a defect marking method and a defect marking device, a manufacturing method and a raw material of a raw material, and a manufacturing method and a sheet of a sheet.

For example, in the manufacturing process of long strip-shaped original materials such as resin films and paper, the original material is inspected for defects during the transportation of the original material, and the defective parts of the original material are marked according to the results of the defect inspection (hereinafter (Referred to as a defect mark) (see, for example, Patent Documents 1 to 4 below).

In addition, in the manufacturing steps of optical films (sheets) such as polarizing plates used in liquid crystal display panels, the position, type, size, inspection method, and the like of the defects are compared with the defects by using a print head. Relevant information (hereinafter, referred to as defect information) is recorded (printed) in a specific area (hereinafter, referred to as a recording area) along the edge of the optical film.

The optical film is wound on the core material after the defect information is recorded. When the amount of the wound film reaches a certain amount, it is cut off from the optical film on the upstream side in the conveying direction and shipped as a raw material roll. A sheet (chip) is cut from a raw material roll and cut into a predetermined size and direction according to the product specifications. In addition, the defective part is excluded from the product and is invalid.

    (Prior technical literature)         (Patent Literature)    

Patent Document 1: Japanese Patent Laid-Open No. 2001-305070

Patent Document 2: Japanese Patent Application Laid-Open No. 2002-303580

Patent Document 3: Japanese Patent Application Laid-Open No. 2011-102985

Patent Document 4: Japanese Patent Application Publication No. 2014-16217

However, in the defect mark of the above-mentioned conventional technology, when the defective part is cut from the original material, the cut is performed between the mark and the defect. Therefore, the defect is located on the side cut off due to the cutting and due to the cutting. Which one of the leftover sides is left may be unknown after cutting.

Further, in the invention described in the aforementioned Patent Document 2, a mark is added to a defective portion by adding a scratch mark. However, in the case of marking the scratch marks, it is impossible to eliminate the scratch marks after the defect inspection. At this time, the visual inspection (quality inspection) after marking may allow the defective part to be used as a product. However, once the scratch mark is marked, it can no longer be used as a product.

On the other hand, in general, in the defect mark of the conventional technique described above, only the position of the defect is marked by marking the defect site. Therefore, in the defect mark of the conventional technology, the foregoing defect information is not recorded. Therefore, for example, when defect information is required when the raw material roll is inspected again before shipment, the defect information must be separately recorded in a recording area in advance.

The present invention is proposed in view of the above-mentioned known circumstances, and its object is to provide a defect marking method and a defect marking device suitable for marking the position of a defect, a method for manufacturing a raw material and a raw material, and a method for manufacturing a sheet and a tablet .

As a means for solving the problem, according to an aspect of the present invention, a defect marking method is provided for marking a defect part of an inspection object, wherein the defect is located in a direction in a plane with the inspection object. The method of printing between the first printing pattern and the second printing pattern adjacent to each other in the other direction is to print the first printing pattern and the second printing pattern on the surface of the inspection object.

In addition, in the defect marking method of the foregoing aspect, information related to the defect may be recorded by a printing pattern of one or both of the first printing pattern and the second printing pattern.

In addition, in the defect marking method of the foregoing aspect, it may also be: printing at least one dot-like mark or arranging a plurality of dot-like marks along one of the directions to print, as any of the foregoing. Either or both print styles.

In addition, in the defect marking method of the foregoing aspect, at least one linear mark may be printed or a plurality of linear marks may be arranged along the one direction to be printed, as any of the foregoing The printing style of both.

In addition, in the defect marking method of the aspect described above, information related to the defect may be recorded by changing any one or more of the number, interval, size, and color of the symbol.

In addition, in the defect marking method of the aspect described above, the position of the defect in the one direction may be marked by changing a printing pattern of at least a part of the plurality of marks arranged in the one direction.

In addition, in the defect marking method of the foregoing aspect, a blank formed by vacating at least a part of a plurality of marks arranged along the one direction may be arranged at a position adjacent to the defect. Therefore, the position of the aforementioned defect in the aforementioned one direction is indicated.

In addition, in the defect marking method of the foregoing aspect, the third printing may be adjacent to one or both of the first printing pattern and the second printing pattern in the other direction. The pattern is printed to record information related to the aforementioned defects.

In addition, in the defect marking method of the foregoing aspect, information related to other than the foregoing defect may be recorded by a printing pattern of any of the foregoing.

In addition, in the defect marking method in the foregoing aspect, the foregoing printing pattern may be printed using an erasable ink.

In addition, in the defect marking method of the aspect described above, the defect portion of the long strip-shaped raw material conveyed in the one direction as the inspection object may be marked.

Moreover, in the defect marking method of the said aspect, you may mark the defect part of the sheet | seat obtained by cutting a long strip | belt-shaped raw material as the said inspection object.

In addition, according to an aspect of the present invention, a method for manufacturing a raw material is provided, which includes the following steps: a step of performing defect inspection on a long strip-shaped raw material conveyed in one direction; and using any one of the foregoing defect marking methods, While the raw material is being transported in one of the directions, a step of marking the defective part of the raw material according to a result of the defect inspection.

In addition, according to an aspect of the present invention, a method for manufacturing a sheet is provided, which includes the steps of: performing a defect inspection step on a sheet obtained by cutting a long strip-shaped raw material; As a result of the aforementioned defect inspection, a step of marking the defective part of the aforementioned sheet is performed.

In addition, according to an aspect of the present invention, there is provided a defect marking device including a printing device for marking a defective portion of an object to be inspected; the printing device having: The other direction is arranged at predetermined intervals, and a plurality of printing sections are printed on the surface of the inspection object with a printing pattern; and a control section for controlling the driving of the plurality of printing sections; In a manner between the first printing pattern and the second printing pattern adjacent to each other in the aforementioned direction, control is performed on a printing unit for selecting the first printing pattern and the second printing pattern to be printed.

In addition, in the defect marking device of the foregoing aspect, the control unit may be configured so that the printing unit of either or both of the selections described above is used in accordance with information related to the defects to be recorded. Control of changing one or both of the first printing pattern and the second printing pattern.

In addition, in the defect marking device of the foregoing aspect, it may be configured to print at least one dot-like mark or arrange a plurality of dot-like marks along one of the directions to print, as any of the foregoing. Or both.

In addition, in the defect marking device of the foregoing aspect, it may be configured to print at least one linear mark or arrange a plurality of linear marks along one of the directions to print, as any of the foregoing. Or both.

In addition, the defect marking device of the above aspect may be configured to change any one or more of the number, interval, size, and color of the marks.

In addition, in the defect marking device of the aspect described above, the control unit may be configured to change the interval of at least a part of the plurality of marks arranged in the one direction to the selected printing unit. control.

In addition, in the defect marking device of the aspect described above, the control unit may be configured so that at least a part of the plurality of marks arranged along the one direction is vacated with respect to any one of the selected printing units. The formed blank is placed in a position adjacent to the aforementioned defect.

In addition, in the defect marking device of the foregoing aspect, the control unit may be configured to select one of the first printing pattern and the second printing pattern adjacent to the other direction in the other direction. The printing unit for which the third printing style is to be printed controls the change of the third printing style to the printing unit of one or both of the selected printing areas in accordance with the information related to the aforementioned defects.

In addition, in the defect marking device of the foregoing aspect, the control unit may be configured to change any one of the selected printing units according to information other than the defect to be recorded. Control of printing style.

In addition, according to an aspect of the present invention, a raw material manufacturing apparatus is provided, which is provided with a defect inspection device for performing defect inspection on a long strip-shaped raw material conveyed in one direction, and any one of the foregoing defect marking devices; While the material is being transported in one of the directions, marks are made on the defective parts of the original material based on the results of the defect inspection.

In addition, according to an aspect of the present invention, there is provided a sheet manufacturing apparatus including a defect inspection apparatus for performing defect inspection on a sheet obtained by cutting a long strip-shaped raw material, and any one of the foregoing defect marking apparatuses; As a result of the inspection, a defect portion of the aforementioned sheet was marked.

In addition, according to an aspect of the present invention, there is provided a raw material, which is a long strip-shaped raw material with a mark applied to a defect portion; and has a first print adjacent to the short side by being printed on the surface by the mark Pattern and second printing pattern; the position of the defect is marked by placing the defect between the first printing pattern and the second printing pattern.

In addition, the original material in the aforementioned aspect may be configured to record information related to the defect by a printing pattern of either or both of the first printing pattern and the second printing pattern.

In addition, in the original material of the foregoing aspect, it may be constituted as: printing at least one dot-like mark or arranging a plurality of dot-like marks along the long side direction for printing, as any of the foregoing or The printing style of both.

In addition, in the original material of the foregoing aspect, it may be configured as: printing at least one linear mark or arranging multiple linear marks along the long side direction to make a print, as any one of the foregoing or The printing style of both.

Moreover, the raw material of the said aspect may be comprised so that any one or more of the said number of marks, an interval, a size, and a color may be changed.

In addition, in the original material of the aspect described above, the position of the defect in the long-side direction may be marked by changing the printing pattern of at least a part of the plurality of marks arranged along the long-side direction. .

In addition, in the raw material of the aspect described above, a space formed by vacating at least a part of the plurality of marks arranged along the long-side direction may be arranged at a position adjacent to the defect, thereby The position of the defect in the longitudinal direction is indicated.

In addition, the original material in the aforementioned aspect may be configured to have a third printing pattern adjacent to either or both of the first printing pattern and the second printing pattern in the short-side direction. According to the third printing style, information related to the defect is recorded.

In addition, the original material in the aforementioned aspect may be configured to record information related to other than the aforementioned defects by a printing pattern of any of the foregoing.

In addition, the original material in the aspect described above may be configured to have the aforementioned printing pattern printed with erasable ink.

In addition, according to an aspect of the present invention, there is provided a sheet that is marked with a mark on a defective portion; The printing pattern and the second printing pattern are positioned between the first printing pattern and the second printing pattern to mark the position of the defect.

In addition, in the above-mentioned piece, the information related to the defect may be recorded by the printing pattern of any one or both of the first printing pattern and the second printing pattern.

In addition, in the aforementioned aspect of the film, at least one dot-shaped mark may be printed or a plurality of dot-shaped marks may be arranged along the aforementioned direction to be printed, as any one or two of the foregoing. Printing style.

In addition, in the aforementioned aspect of the film, at least one linear mark may be printed or a plurality of linear marks may be arranged along one of the directions to be printed, as any one or two of the foregoing. Printing style.

In addition, in the aforementioned aspect of the film, any one or more of the number, interval, size, and color of the marks may be changed.

In addition, in the aforementioned aspect of the film, the position of the defect in the one direction may be marked by changing the printing pattern of at least a part of the plurality of marks arranged along the one direction.

In addition, in the aforementioned aspect of the film, the blank formed by vacating at least a part of the plurality of marks arranged along the one direction may be arranged at a position adjacent to the defect, thereby marking the blank. The aforementioned defect is located in the aforementioned one direction.

In addition, the piece of the aspect described above may be configured to have a third printing style adjacent to either or both of the first printing style and the second printing style in the other direction, and In the third printing style, information related to the defect is recorded.

In addition, in the aforementioned aspect of the film, it may be configured such that information related to other than the aforementioned defect is recorded by a printing pattern of any of the foregoing.

In addition, in the above-mentioned sheet, the above-mentioned printing pattern may be configured to be printed with erasable ink.

As described above, according to aspects of the present invention, it is possible to provide a defect marking method and a defect marking device suitable for marking the position of a defect, a method for manufacturing a raw material and a raw material, and a method for manufacturing a sheet and a sheet.

10‧‧‧ Defect marking device

11‧‧‧The first defect inspection device

12‧‧‧Second defect inspection device

13‧‧‧Recording device (printing device)

13a‧‧‧printing head

13b‧‧‧Nozzle section (printing section)

14‧‧‧The first length measuring device

15‧‧‧The second length measuring device

16‧‧‧control device (control section)

21a to 25a‧‧‧Lighting Department

21b to 25b ‧‧‧ Light Detection Department

100‧‧‧ film manufacturing equipment (raw material manufacturing equipment)

101‧‧‧The first transfer line

102‧‧‧The second transfer line

103‧‧‧ the third transfer line

104‧‧‧The fourth transfer line

105‧‧‧The fifth transfer line

106‧‧‧Receiving Department

111a, 111b‧‧‧1st pinch roller

112‧‧‧The first accumulator

112a, 112b‧‧‧1st swinging roller

113‧‧‧The first guide roller

121a, 121b‧‧‧ 2nd pinch roller

122‧‧‧Second Accumulator

122a, 122b‧‧‧ 2nd swing roller

123a, 123b‧‧‧ 2nd guide roller

131a, 131b‧‧‧3rd pinch roller

141a, 141b ‧‧‧ 4th pinch roller

142‧‧‧3rd accumulator

142a, 142b‧‧‧3rd swing roller

143a, 143b‧‧‧ 4th guide roller

151a, 151b‧‧‧5th pinch roller

151c, 151d‧‧‧6th pinch roller

152‧‧‧4th accumulator

152a, 152b‧‧‧ 4th swing roller

153a‧‧‧5th guide roller

153b‧‧‧6th guide roller

153c‧‧‧7th guide roller

a to f‧‧‧ arrows

D‧‧‧ Defect

DM‧‧‧dot mark

F4‧‧‧ substrate

F4a‧‧‧Polarizer

F4b, F4c‧‧‧protective film

F5‧‧‧Adhesive layer

F6‧‧‧Isolator

F7‧‧‧Surface protection sheet

F8‧‧‧Fit

F11‧‧‧The first optical film

F12‧‧‧The second optical film

F13‧‧‧The third optical film

F1X‧‧‧Optical Film

F10X‧‧‧Optical Film

F101‧‧‧The first film

F102‧‧‧The second film

F103‧‧‧The third film

F104‧‧‧Single-sided laminating film

F105‧‧‧Double-sided laminating film (original material)

FX‧‧‧ Optical Sheet

G‧‧‧ Peripheral

K‧‧‧ blank

L‧‧‧ transport line

LM‧‧‧ Linear Mark

P‧‧‧LCD panel (optical display device)

P1‧‧‧The first substrate

P2‧‧‧The second substrate

P3‧‧‧LCD layer

P4‧‧‧display area

PT1‧‧‧The first printing style

PT2‧‧‧2nd printing style

PT3‧‧‧3rd printing style

R1‧‧‧The first raw material roll

R2‧‧‧The second raw material roll

R3‧‧‧The third raw material roll

T1, T2‧‧‧ intervals

FIG. 1 is a plan view showing an example of a liquid crystal display panel.

FIG. 2 is a cross-sectional view of the liquid crystal display panel shown in FIG. 1. FIG.

Fig. 3 is a cross-sectional view showing an example of an optical film.

FIG. 4 is a side view showing the configuration of a film manufacturing apparatus and a defect marking apparatus.

Fig. 5 is a plan view showing the structure of the defect marking device shown in Fig. 4.

FIG. 6 is a plan view showing an example of a first printing pattern and a second printing pattern that are printed with dot marks.

FIG. 7 is a plan view showing an example of a first printing pattern and a second printing pattern that are printed with linear marks.

8 (a) to (c) are plan views showing an example of adding a third printing pattern.

Figures 9 (a) to (d) are plan views illustrating the difference between the types of defects and their printing styles.

Figures 10 (a) and (b) are sectional views showing defects occurring in the first manufacturing step and the second manufacturing step.

Figures 11 (a) to (c) are plan views showing an example of a first printing pattern and a second printing pattern for printing on defects occurring in the first manufacturing step and the second manufacturing step.

FIG. 12 is a plan view showing a modified example of the first printing pattern and the second printing pattern.

13 (a) to (g) are plan views illustrating combinations of printing patterns.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In this embodiment, for example, the production system of an optical display device is directed to a film production apparatus (a production apparatus for a raw material) and a film production method (a raw material) using the film production apparatus. Manufacturing method).

The film manufacturing device is, for example, a film-like device such as a polarizing film, a retardation film, or a brightness enhancement film that is bonded to a panel-shaped optical display component (optical display panel) such as a liquid crystal display panel or an organic EL (Electro-Luminescence) display panel. Optical component (optical film) device. The film production apparatus constitutes a part of a production system for producing an optical display device including the above-mentioned optical display parts and optical members.

In this embodiment, the optical display device is a transmissive liquid crystal display device. The transmissive liquid crystal display device is roughly provided with a liquid crystal display panel and a backlight. In this type of liquid crystal display device, the illumination light emitted from the backlight is incident from the rear side of the liquid crystal display panel, and the light modulated by the liquid crystal display panel is emitted from the front side of the liquid crystal display panel, so that an image can be displayed. .

(Optical display device)

First, the configuration of the liquid crystal display panel P shown in FIG. 1 and FIG. 2 will be described for an optical display device. In addition, FIG. 1 is a plan view showing the configuration of the liquid crystal display panel P. FIG. 2 is a cross-sectional view of the liquid crystal display panel P along a cutting line A-A shown in FIG. 1. It should be noted that the hatching showing the cross section is omitted in the second figure.

As shown in FIGS. 1 and 2, the liquid crystal display panel P is roughly provided with: a first substrate P1; a second substrate P2 arranged opposite to the first substrate P1; and a liquid crystal layer P3 arranged at the first Between the substrate P1 and the second substrate P2.

The first substrate P1 is composed of a transparent substrate having a rectangular shape in plan view. The second substrate P2 is composed of a rectangular transparent substrate smaller than the first substrate P1. The liquid crystal layer P3 is disposed inside a region having a rectangular shape in plan view enclosed by a sealing material (not shown) and sealing the periphery between the first substrate P1 and the second substrate P2. In the liquid crystal display panel P, a region limited to the inside of the outer periphery of the liquid crystal layer P3 in a plan view is a display region P4, and a region outside the periphery of the display region P4 is a peripheral portion G.

On the back (backlight side) of the liquid crystal display panel P, a first optical film F11 as a polarizing film and a third optical film F13 as a brightness enhancement film laminated on the first optical film F11 are sequentially laminated. A second optical film F12 as a polarizing film is bonded to the surface (display surface side) of the liquid crystal display panel P. Hereinafter, the first, second, and third optical films F11 to F13 are collectively referred to as an optical film F1X.

(Optical film)

Next, an example of the optical sheet FX constituting the optical film F1X shown in FIG. 3 will be described. FIG. 3 is a cross-sectional view showing the configuration of the optical sheet FX. In addition, in FIG. 3, the illustration of the hatching which shows a cross section is abbreviate | omitted.

The optical film F1X is obtained by cutting a sheet member (end sheet) of a predetermined length from the long strip-shaped optical sheet (original material) FX shown in FIG. 3. Specifically, the optical sheet FX has: a base material sheet F4; an adhesive layer F5, which is provided on one side of the base material sheet F4 (the top surface in FIG. 3); and a separator sheet F6, which is an adhesive layer. The layer F5 is provided on one side of the base material sheet F4, and the surface protection sheet F7 is provided on the other side (bottom surface in FIG. 3) of the base material sheet F4.

When the base material sheet F4 is, for example, a polarizing film, it has a structure in which the polarizer F4a is sandwiched by a pair of protective films F4b and F4c. The adhesive layer F5 is a layer for attaching a sheet (optical film F1X) to the liquid crystal display panel P. The release sheet F6 is a sheet for protecting the adhesive layer F5, and is peeled off from the adhesive layer F5 before the sheet member (optical film F1X) is attached to the liquid crystal display panel P. In addition, the part after removing the separator F6 from the optical film F1X becomes a bonding sheet F8.

The surface protection sheet F7 is a sheet that protects the surface of the base material sheet F4. The surface protection sheet F7 is peeled off from the surface of the sheet member (optical film F1X) after the sheet member (optical film F1X) is adhered to the liquid crystal display panel P.

The base material sheet F4 may have a configuration in which any one of the pair of protective films F4b and F4c is omitted. For example, a configuration in which the protective film F4b on the side of the adhesive layer F5 is omitted and the adhesive layer F5 is directly provided on the polarizer F4a can be adopted. In addition, the protective film F4c on the surface protective sheet F7 side can also be subjected to, for example, a hard coat treatment to protect the outermost portion of the liquid crystal display panel P, an anti-glare treatment to obtain an anti-glare effect, and the like. Surface treatment. The base material sheet F4 is not limited to the above-mentioned laminated structure, and may be a single-layer structure. The surface protection sheet F7 can also be omitted.

(Film manufacturing apparatus and method)

Next, the film manufacturing apparatus 100 shown in FIG. 4 is demonstrated. FIG. 4 is a side view showing a configuration of the film manufacturing apparatus 100.

As shown in FIG. 4, the film manufacturing apparatus 100 is, for example, a surface of the long-belt-shaped second film F102 that is a surface protective film, and is bonded to one side of the long-belt-shaped first film F101 that is a polarizing film. The long strip-shaped third film F103 of the protective film is bonded to the other surface of the first film F101, thereby manufacturing an optical film F10X in which the second film F102 and the third film F103 are bonded to both sides of the first film F101.

Specifically, the film manufacturing apparatus 100 is roughly provided with a first transfer line 101, a second transfer line 102, a third transfer line 103, a fourth transfer line 104, a fifth transfer line 105, and a take-up Department 106.

Among them, the first conveying line 101 forms a conveying path for conveying the first film F101; the second conveying line 102 forms a conveying path for conveying the second film F102 from the first raw material roll R1; the third The conveying line 103 forms a conveying path for conveying the single-sided laminating film F104 formed by laminating the second film F102 on one side of the first film F101; the fourth conveying line 104 forms a conveying line from the second raw material roll The third film F103 from the R2 roll is a conveying path for conveying; the fifth conveying line 105 forms a surface on the first film F101 side (the other surface of the first film F101) of the single-sided lamination film F104, and the first film F101 is bonded to the first film F101. A conveying path for conveying a double-sided laminated film F105 (optical film F10X) composed of three films F103. In addition, the manufactured optical film F10X is rolled up by the core material in the winding portion 106 to become the third raw material roll R3.

The first transfer line 101 is, for example, applying a treatment such as dyeing treatment, cross-linking treatment, or extension treatment to a film that is a substrate of a polarizer such as PVA (Polyvinyl Alcohol; polyvinyl alcohol), and attaching TAC to both sides thereof. The long film-like first film F101 obtained from a protective film such as (Triacetylcellulose) is transferred to a third transfer line 103.

Specifically, in the first transfer line 101, a pair of first nip rollers are arranged in the horizontal direction from one side of the upstream side of the third transfer line 103 to the third transfer line 103 in the horizontal direction. 111a and 111b, a first accumulator 112 and a first guide roller 113 including a plurality of first dancer rollers 112a and 112b.

The pair of first pinch rollers 111a and 111b are sandwiched between the first film F101 and rotate in opposite directions, thereby pulling the first film F101 in the direction of the arrow a (right direction) shown in FIG. 4. 1 film F101.

The first accumulator 112 is used to absorb a difference caused by a change in the feed amount of the first film F101 and to reduce a change in tension applied to the first film F101. Specifically, the first accumulator 112 includes a plurality of swing rollers 112a positioned on the upper side and alternately arranged between the first nip rollers 111a and 111b and the first guide roller 113, and The lower side includes a plurality of swing rollers 112b.

In the first accumulator 112, the first film F101 is staggered and wound around the upper swing roller 112a and the lower swing roller 112b, and the first film F101 is conveyed while the upper film is conveyed. The swing roller 112a and the swing roller 112b on the lower side are opposed to each other in a vertical direction. This makes it possible to accumulate the first film F101 without stopping the first transfer line 101. For example, in the first accumulator 112, the accumulation of the first film F101 can be increased by increasing the distance between the upper-side swing roller 112a and the lower-side swing roller 112b, and conversely, it is possible to reduce the upper side The distance between the swing roller 112a and the swing roller 112b on the lower side reduces the accumulation of the first film F101. The first accumulator 112 is operated during, for example, a paper receiving operation after replacing the core material of the raw material rolls R1 to R3.

The first guide roller 113 guides the first film F101 pulled out by the first nip rollers 111 a and 111 b toward the upstream side of the third conveyance line 103 while rotating. In addition, the first guide roller 113 is not limited to a configuration in which only one is arranged, and a configuration in which a plurality of first guide rollers 113 are arranged may be used.

The second transfer line 102 is for example a PET (Polyethylene terephthalate; polyethylene terephthalate) or the like, and a long strip-shaped second film F102 is sent from the first raw material roll R1 while being conveyed. To the third transfer line 103.

Specifically, in the second transfer line 102, a pair of second pinch rollers 121a, 121b are arranged in the horizontal direction from the other side across the upstream side of the third transfer line 103 to the third transfer line 103 in the horizontal direction. , A second accumulator 122 including a plurality of second swing rollers 122a, 122b, and a plurality of second guide rollers 123a, 123b.

The pair of second pinch rollers 121a and 121b are rotated in opposite directions while sandwiching the second film F102 therebetween, thereby pulling out in the direction of the arrow b (left direction) shown in FIG. 4. The second film F102.

The second accumulator 122 is used to absorb a difference caused by a change in the feeding amount of the second film F102 and to reduce a change in tension applied to the second film F102. Specifically, the second accumulator 122 includes a plurality of swing rollers 122a disposed on the upper side between the second nip rollers 121a and 121b and the second guide rollers 123a and 123b in an alternate arrangement, and A plurality of swing rollers 122b located on the lower side are configured.

In the second accumulator 122, the second film F102 is alternately wound around the upper swing roller 122a and the lower swing roller 122b, and the second film F102 is conveyed while the second film F102 is conveyed. The swinging roller 122a and the swinging roller 122b on the lower side are opposed to each other in a vertical direction. This makes it possible to accumulate the second film F102 without stopping the second transfer line 102. For example, in the second accumulator 122, the accumulation of the second film F102 can be increased by increasing the distance between the upper-side swing roller 122a and the lower-side swing roller 122b, and conversely, it is possible to reduce the upper side The distance between the swing roller 122a and the swing roller 122b on the lower side reduces the accumulation of the second film F102. The second accumulator 122 is operated during, for example, a paper receiving operation after replacing the core materials of the raw material rolls R1 to R3.

The plurality of second guide rollers 123 a and 123 b guide the second film F102 pulled out by the second pinch rollers 121 a and 121 b to the upstream side of the third transfer line 103 while rotating respectively. The second guide rollers 123a and 123b are not limited to a configuration in which a plurality of second guide rollers 123a and 123b are disposed, and may be a configuration in which only one is disposed.

The third transfer line 103 is a long-belt-shaped single-sided bonding film F104 in which the second film F102 is bonded to one side of the first film F101 and is transferred to the fifth transfer line 105.

Specifically, a pair of third pinch rollers 131 a and 131 b are arranged on the third transfer line 103. A pair of third pinch rollers 131a and 131b are located at the confluence point of the downstream side of the first conveying line 101 and the downstream side of the second conveying line 102, and sandwich the first film F101 and the second film F102 therebetween By rotating in the opposite direction, the single-sided bonding film F104 formed by bonding the first film F101 and the second film F102 together is pulled out in the direction of the arrow c (downward direction) shown in FIG. 4.

The fourth conveying line 104 is, for example, a long strip-shaped third film F103 that is a surface protective film such as PET (Polyethylene terephthalate) and is conveyed from the second raw material roll R2 to the fifth conveying line 105.

Specifically, a pair of fourth nip rollers 141a, 141b, and 4th nip rollers 141a, 141b, A third accumulator 142 including a plurality of third swing rollers 142a, 142b, and a plurality of fourth guide rollers 143a, 143b.

A pair of fourth pinch rollers 141a and 141b rotate the opposite directions while sandwiching the third film F103 therebetween, thereby pulling out in the direction of the arrow d (right direction) shown in FIG. 4 Third film F103.

The third accumulator 142 is used to absorb the difference caused by the variation in the feed amount of the third film F103 and reduce the variation in the tension applied to the third film F103. Specifically, the third accumulator 142 includes a plurality of oscillating rollers 142a located on the upper side between the fourth nip rollers 141a and 141b and the fourth guide rollers 143a and 143b in an alternate arrangement, and A plurality of swing rollers 142b located on the lower side are configured.

In the third accumulator 142, the third film F103 is alternately wound around the upper swing roller 142a and the lower swing roller 142b, and the third film F103 is conveyed while the upper film The swinging roller 142a and the swinging roller 142b on the lower side are opposed to each other in a vertical direction. Thereby, the third film F103 can be accumulated without stopping the fourth conveyance line 104. For example, in the third accumulator 142, the accumulation of the third film F103 can be increased by increasing the distance between the swing roller 142a on the upper side and the swing roller 142b on the lower side, and conversely, it is possible to reduce the The distance between the swing roller 142a and the swing roller 142b on the lower side reduces the accumulation of the third film F103. The third accumulator 142 is operated during, for example, a paper receiving operation after replacing the core materials of the raw material rolls R1 to R3.

The plurality of fourth guide rollers 143a and 143b are respectively rotated while guiding the third film F103 pulled out by the fourth pinch rollers 141a and 141b to the downstream side of the third transfer line 103 (upstream of the fifth transfer line 105). side). The fourth guide rollers 143a and 143b are not limited to a configuration in which a plurality of the fourth guide rollers 143a and 143b are disposed, and may be a configuration in which only one is disposed.

The fifth conveying line 105 is a long-belt double-sided bonding film formed by bonding the third film F103 to the first film F101 side of the single-sided bonding film F104 (the other side of the first film F101). F105 (optical film F10X) is transported to the third raw material roll R3.

Specifically, in the fifth transfer line 105, a pair of fifth pinch rollers 151a are arranged in the horizontal direction from the other side across the downstream side of the third transfer line 103 to the third raw material roll R3 in the horizontal direction. 151b, a fifth guide roller 153a, a pair of sixth pinch rollers 151c, 151d, a fourth accumulator 152 including a plurality of fourth swing rollers 152a, 152b, and a sixth guide roller 153b.

The pair of fifth pinch rollers 151a and 151b are located at the confluence point of the downstream side of the third conveying line 103 and the upstream side of the fifth conveying line 105, and sandwich the single-sided laminating film F104 and the third film F103 therebetween. , While rotating in opposite directions to each other, thereby pulling out the double-sided surface formed by bonding the single-sided bonding film F104 and the third film F103 to the direction (downward direction) of the arrow e shown in FIG. 4. Lamination film F105.

The fifth guide roller 153a guides the double-sided bonding film F105 pulled out by the fifth pinch rollers 151a and 151b to the fourth accumulator 152 while rotating. The fifth guide roller 153a is not limited to a configuration in which only one is arranged, and a configuration in which a plurality of fifth guide rollers 153a are arranged may be used.

The pair of sixth pinch rollers 151c and 151d rotates in opposite directions while sandwiching the double-sided bonding film F105 therebetween, thereby moving in the direction of the arrow f (right direction) shown in FIG. 4. Pull out the double-sided bonding film F105.

In the fourth accumulator 152, the double-sided bonding film F105 is staggered and wound around the upper-side swing roller 152a and the lower-side swing roller 152b. The swinging roller 152a on the upper side and the swinging roller 152b on the lower side are caused to relatively move up and down in the vertical direction. Thereby, the double-sided bonding film F105 can be accumulated without stopping the fifth conveyance line 105. For example, in the fourth accumulator 152, the accumulation of the double-sided bonding film F105 can be increased by increasing the distance between the upper-side swing roller 152a and the lower-side swing roller 152b, and conversely, the upper portion can be reduced by reducing The distance between the swing roller 152a on the side and the swing roller 152b on the lower side reduces the accumulation of the double-sided bonding film F105. The fourth accumulator 152 is operated during, for example, a paper receiving operation after replacing the core materials of the raw material rolls R1 to R3.

The sixth guide roller 153b guides the double-sided bonding film F105 to the third raw material roll R3. In addition, the sixth guide roller 153b is not limited to a configuration in which only one is arranged, and may be a configuration in which a plurality of the sixth guide rollers 153b are arranged.

The double-sided bonding film F105 is wound into the core material at the winding unit 106 to become the third raw material roll R3 of the optical film F10X, and then is sent to the next step.

(Defect marking device and defect marking method)

Next, a defect marking device 10 provided in the film manufacturing apparatus 100 and a defect marking method using the defect marking device 10 will be described.

As shown in FIG. 4, the defect marking device 10 constitutes a part of the film manufacturing device 100, and is roughly configured to include a transfer line L, a first defect inspection device 11, a second defect inspection device 12, and a recording device 13. , The first length measuring device 14 and the second length measuring device 15, and the control device 16.

The transfer line L forms a transfer path for transferring the film to be inspected. In the present embodiment, the transfer line L is constituted by the aforementioned first transfer line 101, third transfer line 103, and fifth transfer line 105.

The first defect inspection device 11 performs a defect inspection of the first film F101 before bonding the second film F102 and the third film F103. Specifically, the first defect inspection device 11 detects various defects such as a foreign object defect, a concave-convex defect, and a bright-spot defect that occur when the first film F101 is manufactured and when the first film F101 is transported. The first defect inspection device 11 performs inspection processing such as reflection inspection, penetration inspection, oblique penetration inspection, and crossed Nicols penetration inspection on the first film F101 transported by the first transport line 101. , And a defect of the first film F101 is detected.

The first defect inspection device 11 includes a plurality of illumination sections 21a to 23a on the first conveying line 101 upstream of the first pinch rollers 111a and 111b, and irradiates illumination light to the first film F101; and The light detecting sections 21b to 23b detect light (transmitted light) that has passed through the first film F101 or light (reflected light) that has been reflected by the first film F101.

In this embodiment, since it is configured to detect transmitted light, the plurality of illumination portions 21a to 23a and the light detection portions 21b to 23b arranged along the conveyance direction of the first film F101 are disposed opposite to each other with the first film F101 interposed therebetween. In addition, the first defect inspection device 11 is not limited to a configuration for detecting the transmitted light, and may be configured to detect reflected light, or detect transmitted light and reflected light. When the reflected light is detected, the light detection sections 21b to 23b may be disposed on the illumination sections 21a to 23a.

The illuminating sections 21a to 23a irradiate the first film F101 with illumination light whose light intensity, wavelength, and polarization state are adjusted according to the type of defect inspection. The light detecting sections 21b to 23b use an imaging element such as a CCD (Charge Coupled Device) to capture an image of a position where the first film F101 is illuminated by the illumination light. The images (results of defect inspection) captured by the light detection sections 21 b to 23 b are output to the control device 16.

The second defect inspection device 12 performs a defect inspection of the first film F101 after bonding the second film F102 and the third film F103, that is, the double-sided bonding film F105. Specifically, the second defect inspection device 12 detects when the second film F102 and the third film F103 are bonded to the first film F101, and when the single-sided bonding film F104 and the double-sided bonding film F105 are transported. Various defects such as foreign object defects, bump defects, bright spot defects. The second defect inspection device 12 performs inspection processing such as reflection inspection, penetration inspection, oblique penetration inspection, and orthogonal polarization penetration inspection on the double-sided bonding film F105 transported by the fifth transport line 105, and Defects in the double-sided bonding film F105 were detected.

The second defect inspection device 12 includes a plurality of illumination portions 24a and 25a on the fifth conveying line 105 further downstream than the fifth pinch rollers 151a and 151b, and irradiates the double-sided bonding film F105 with illumination light; and The plurality of light detecting sections 24b and 25b detect light (penetrated light) transmitted through the double-sided bonding film F105 or light (reflected light) reflected by the double-sided bonded film F105.

In the present embodiment, since it is configured to detect transmitted light, the plurality of illumination portions 24a, 25a and the light detection portions 24b, 25b arranged along the conveying direction of the double-sided bonding film F105 are respectively disposed through the double-sided bonding film F105. Relative configuration. In addition, the second defect inspection device 12 is not limited to a configuration that detects the transmitted light, and may be a configuration that detects reflected light, or detects transmitted light and reflected light. In the case of detecting the reflected light, the light detection sections 24b and 25b may be disposed on the side of the illumination sections 24a and 25a.

The illuminating sections 24 a and 25 a irradiate the double-sided bonding film F105 with illumination light whose light intensity, wavelength, and polarization state are adjusted according to the type of defect inspection. The light detection sections 24b and 25b use an imaging element such as a CCD to capture an image of a position where the double-sided bonding film F105 is illuminated by the illumination light. The images (results of defect inspection) captured by the light detection units 24 b and 25 b are output to the control device 16.

The recording device 13 is a printing device for marking a defective part based on the results of the defect inspection by the first defect inspection device 11 and the second defect inspection device 12. The recording device 13 is provided on the fifth transfer line 105 further downstream than the second defect inspection device 12. The recording device 13 includes, for example, a plurality of print heads 13 a using an inkjet method. The print head 13a may be a laser type.

As shown in FIG. 5, the plurality of printing heads 13 a are arranged in a direction (width direction) that intersects the conveying direction of the double-sided bonding film F105. In addition, in each of the print heads 13a, nozzle portions (printing portions) 13b that eject ink are arranged at predetermined intervals in a direction (width direction) that intersects the conveying direction of the double-sided bonding film F105. The nozzle portions 13b of the print heads 13a are arranged at equal intervals from the one end side in the width direction of the double-sided bonding film F105 to the other end side with respect to the double-sided bonding film F105.

In addition, a seventh guide roller 153c that is in contact with the double-sided bonding film F105 is disposed at a position facing the plurality of print heads 13a. In addition, the nozzle portion 13b of each print head 13a ejects ink toward the surface of the double-sided bonding film F105 from the opposite side of the position where the double-sided bonding film F105 is in contact with the seventh guide roller 153c. Thereby, a dot-shaped mark can be printed (marked) on the surface of the double-sided bonding film F105.

The first length measuring device 14 and the second length measuring device 15 measure the conveyance amount of the first film F101. Specifically, in this embodiment, the first nip roller 111a located on the first conveying line 101 on the upstream side of the first accumulator 112 is provided with a rotary encoder constituting the first length measuring device 14. (rotary encoder) and the third nip roller 131 a located further downstream than the first accumulator 112 are provided with a rotary encoder constituting the second length measuring device 15.

Regarding the first length measuring device 14 and the second length measuring device 15, the amount of rotation displacement of the first pinch roller 111a and the third pinch roller 131a that rotates in contact with the first film F101 is determined by a rotary encoder. The conveyance amount of the first film F101 was measured. The measurement results of the first length measuring device 14 and the second length measuring device 15 are output to the control device 16.

In addition, in this embodiment, since there is only one accumulator between the first defect inspection device 11 and the recording device 13, a configuration is provided in which one length measuring device is disposed on each of the upstream side and the downstream side of the accumulator. . On the other hand, when there are a plurality of accumulators between the first defect inspection device 11 and the recording device 13, it is only necessary to configure an upstream side of the accumulator located on the most upstream side and a downstream side of the accumulator located on the most downstream side. One length measuring device may be arranged on each of the downstream sides of the accumulator.

The control device 16 is a part of the system control film manufacturing device 100. Specifically, the control device 16 includes a computer system as an electronic control device. The computer system is roughly equipped with an arithmetic processing unit such as a CPU (Central Processing Unit), and an information storage unit such as a memory and a hard disc.

An information storage unit of the control device 16 stores an operating system (OS) that controls a computer system, and a program that causes an arithmetic processing unit to execute various processes in each unit of the film manufacturing apparatus 100. In addition, the control device 16 may include a logic circuit such as an ASIC (Application Specific Integrated Circuit) that executes various processes required for controlling each part of the film manufacturing device 100. The control device 16 includes an interface for inputting and outputting between a computer system and an external device. An input device such as a keyboard and a mouse, a display device such as a liquid crystal display, and a communication device can be connected to the interface.

The control device 16 functions as a control unit that controls the driving of the nozzle portions 13 b of the plurality of print heads 13 a based on the results of the defect inspection by the first defect inspection device 11 and the second defect inspection device 12. That is, the control device 16 analyzes the images captured by the light detection sections 21b to 23b and the light detection sections 24b and 25b, and determines the presence (position), type, and the like of defects. Next, when it is determined that there is a defect in the first film F101 and the double-sided bonding film F105, the driving of the nozzle portion 13b that meets the conditions is controlled to mark a defective portion of the defective portion of the double-sided bonding film F105. .

In addition, in the defect marking device 10, a method of avoiding generation of a step difference between the defect inspection position of the double-sided bonding film F105 and the mark position of the defect portion is performed, and the defect marking is performed at a predetermined timing after the defect inspection. . For example, in the present embodiment, the amount of film transported on the transport line L after the time of the defect inspection by the first defect inspection apparatus 11 or the second defect inspection apparatus 12 is calculated. When the conveyance amount and the offset distance match, the defect marking is performed by the recording device 13.

Here, the offset distance means a transport distance of the film between the first defect inspection device 11 and the second defect inspection device 12 and the recording device 13. Specifically, the offset distance is defined as a position (defect inspection position) where the defect inspection is performed by the first defect inspection device 11 and the second defect inspection device 12 and a position (mark position) where the recording device 13 marks Transport distance between films. The offset distance varies when the first accumulator 112 is operated.

The offset distance (hereinafter referred to as the first offset distance) when the first accumulator 112 is not in operation is stored in the information storage section of the control device 16 in advance. Specifically, the first defect inspection device 11 and the second defect inspection device 12 include a plurality of light detection sections 21b to 23b and light detection sections 24b and 25b, and defect inspection is performed for each of the light detection sections 21b to 25b. Therefore, the information storage section of the control device 16 stores the first offset distance for each of the light detection sections 21b to 25b.

When the offset distance is changed due to the operation of the first accumulator 112, the offset distance is calculated based on the difference between the conveyance amount of the first film F101 between the upstream side and the downstream side of the first accumulator 112. Correction value. That is, the control device 16 calculates the accumulation amount of the first film F101 accumulated by the first accumulator 112 from the measurement results of the first length measuring device 14 and the second length measuring device 15, and based on the The accumulated amount of the first film F101 is used to calculate a correction value for the offset distance.

In the defect marking device 10, when the first accumulator 112 is in operation, the timing of marking the recording device 13 is corrected based on the correction value of the offset distance. For example, in this embodiment, the correction value of the offset distance is calculated based on the measurement results of the first length measuring device 14 and the second length measuring device 15. The control device 16 calculates an offset distance (hereinafter, referred to as a second offset distance) when the first accumulator 112 is operated based on the correction value and the first offset distance.

In this embodiment, based on the measurement results of the first length measuring device 14 or the second length measuring device 15, calculation is performed after the time of the defect inspection by the first defect inspection device 11 and the second defect inspection device 12, When the transport amount of the film transported on the transport line L is consistent with the second offset distance, the defect marking is performed by the recording device 13.

In addition, in the present embodiment, during the operation of the first accumulator 112, the information indicating that the first accumulator 112 has been operated (hereinafter referred to as the accumulator operation information) may be distinguished from the defect mark. Recorded on the double-sided bonding film F105. When the operation information of the accumulator is recorded, the operator can carefully check the defect position of the part to which the operation information of the accumulator is added to detect the position difference of the mark position and the like. Thereby, the possibility of erroneously determining a good part as a defective part is reduced, so as to improve the yield.

In addition, in the defect marking device 10 of this embodiment, for example, as shown in FIG. 6, the defect D is located in the first printing pattern PT1 and the second printing adjacent to each other in the width direction of the double-sided bonding film F105. In the method between the patterns PT2, the first printing pattern PT1 and the second printing pattern PT2 are printed on the surface of the double-sided bonding film F105.

In this embodiment, the first printing pattern PT1 and the second printing pattern PT2 are printed with a plurality of dot-shaped marks DM along the conveying direction (long-side direction) of the double-sided bonding film F105. The symbol DM is a size that can be seen by visual observation, and specifically, its diameter is 5 mm (millimeter; millimeter) or less (more preferably, 1 mm or more and 3 mm or less).

The control device 16 selects two nozzle portions 13b for printing the first printing pattern PT1 and the second printing pattern PT2 from the plurality of nozzle portions 13b arranged in the width direction of the double-sided bonding film F105. Next, the two selected nozzle portions 13b are on both sides of the width direction (short side direction) of the double-sided bonding film F105 with the defect D, and the first printing pattern PT1 and the second printing pattern PT2 are printed. .

At this time, by positioning the defect D between the first printing pattern PT1 and the second printing pattern PT2, the position of the defect D located therebetween can be marked. Thereby, in the visual inspection (quality inspection) after marking, the position of the defect D can be easily grasped.

In addition, the distance between the first printing pattern PT1 and the second printing pattern PT2 can recognize the size of the defect D located therebetween. Therefore, the selected two nozzle portions 13b are not necessarily limited to the selection of adjacent nozzle portions 13b of the plurality of nozzle portions 13b arranged along the width direction of the double-sided bonding film F105, as long as the position and size of the defect D are matched. The two nozzle portions 13b may be appropriately selected.

In addition, since the defect D is located between the first printing pattern PT1 and the second printing pattern PT2, when the defect portion is cut from the double-sided bonding film F105, the first printing pattern PT1 and the second printing pattern PT2 are cut. Cutting is performed between any of them and the defect D.

At this time, any one of the first printing pattern PT1 and the second printing pattern PT2 remains on the side cut off by cutting and the side left by cutting. By this, the defect D is located on which of the side cut off due to cutting and the side left over due to cutting, that is, the first printing pattern PT1 or the second printing pattern PT2 remaining after cutting can be easily made. Confirm the location of the defect.

The first printing pattern PT1 and the second printing pattern PT2 can be printed using erasable ink. As described above, the visual inspection (quality inspection) after marking sometimes allows defective parts to be used as products. At this time, by eliminating the first printing pattern PT1 and the second printing pattern PT2, the portion can be used as a product, and productivity can be improved.

For erasable inks, ketones (methyl ethyl ketone, acetone, etc.), esters (ethyl acetate, acetic acid acetate) can be used. An oil-based ink obtained by adding a coloring agent, a film-forming resin, or the like to a solvent appropriately selected from propyl acetate and the like (alcohol) (ethanol, 2-propanol, and the like). In addition, hardeners and surfactants can be added as needed. On the other hand, as the solvent for erasing the ink, the same solvent as that described above can be used. In addition, the use of aromatic hydrocarbons such as toluene and xylene is not suitable because the material of the optical film (polarizing plate) is eroded.

In addition, in the defect marking device 10 according to the present embodiment, information related to the defect D is recorded by using one or both of the first printing pattern PT1 and the second printing pattern PT2.

Specifically, when the control device 16 prints the first print pattern PT1 and the second print pattern PT2, the selected nozzle portion 13b changes the first nozzle pattern 13b in accordance with the information (defect information) related to the defect D to be recorded. Either or both of the printing pattern PT1 and the second printing pattern PT2 (in this embodiment, the first printing pattern PT1 and the second printing pattern PT2) are controlled.

For example, in this embodiment, the number and interval of the marks DM constituting the first printing pattern PT1 and the second printing pattern PT2 are changed according to the defect information to be recorded. Thereby, it is possible to record defect information while marking a defective portion.

Defect information is information related to defect D, such as the position and type, size, and inspection method (type of defect inspection) of defect D. The first printing pattern PT1 and the second printing pattern PT2 are set in advance in the number and interval of the marks DM so that the defect information can be identified.

For example, the first printing pattern PT1 and the second printing pattern PT2 shown in FIG. 6 are arranged in such a manner that five marks DM are printed along one direction of the double-sided bonding film F105, that is, the conveying direction (long-side direction). Among them, two symbols DM are arranged on the upstream side and three symbols DM are arranged on the downstream side, respectively. In addition, a blank (a portion formed by leaving a gap) K in a range of a mark is provided between the mark DM on the upstream side and the mark DM on the downstream side.

The blank K series is arranged in the other direction of the double-sided bonding film F105, that is, in the width direction (short-side direction), and is substantially in the same row as the defect D. That is, the blank K indicates the position of the defect D in the conveying direction (long-side direction) of the double-sided bonding film F105. When the defect D is larger than the blank K, it is preferable to arrange the blank K at a position adjacent to the center of the defect D.

At this time, not only can the defect D be located between the first printing pattern PT1 and the second printing pattern PT2, but also the blank D can be used to indicate that the defect D is located between the mark DM on the upstream side and the mark DM on the downstream side. Thereby, the position of the defect D can be grasped more easily. In addition, when cutting a piece of material across the defect D, by examining the remaining mark DM, it is possible to determine whether there is a defect D in the piece of material. Thereby, the utilization efficiency of the double-sided bonding film F105 can be improved.

In addition, since the number of marks DM on the upstream side and the downstream side are different, the conveyance direction of the double-sided laminated film F105 can be easily grasped even after being cut off from the double-sided laminated film F105 (indicated by the arrow in FIG. Show direction).

In addition, the amount of time difference between the defect inspection position and the mark position can be grasped from the amount of disparity between the defect D and the blank K in the conveying direction (long-side direction) of the double-sided bonding film F105. In addition, based on the time difference, the timing of marking by the recording device 13 can be easily adjusted.

Regarding the size of the blank K, it is preferable to set the interval (distance between centers) T2 of the marks DM across the two sides of the blank K to be longer than the interval (distance between centers) T1 of the marks DM arranged at a certain interval along the conveying direction. Bigger. More specifically, a range of 1.2 ≦ T2 / T1 ≦ 3.0 is preferably used, and a range of 1.5 ≦ T2 / T1 ≦ 2.5 is more preferably used.

As described above, according to this embodiment, the position of the defect D and the defect information can be recorded by the first printing pattern PT1 and the second printing pattern PT2 described above.

The present invention is not limited to the embodiments described above, and various changes can be made without departing from the spirit of the present invention.

For example, the first printing pattern PT1 and the second printing pattern PT2 are not limited to changing the number and interval of the aforementioned marks DM. For example, the size (diameter) and color (red, blue, black, etc.) can be changed. Black is preferred. )Wait. That is, it is only necessary to change the number, interval, size (diameter), and color of the dot-shaped marks DM. Thereby, the printing patterns PT1 and PT2 can be set more finely, that is, more information can be recorded.

In addition, for example, as shown in FIG. 7, the first printing pattern PT1 and the second printing pattern PT2 are not limited to the aforementioned dot-shaped mark DM, and may be along the conveying direction (long side) of the double-sided bonding film F105. (Direction) Printed line-shaped mark LM.

In this case, not only the inkjet printing head 13a can be used, but also, for example, a plurality of markers (printing sections) arranged in a direction (width direction) intersecting with the conveying direction of the double-sided bonding film F105 can be used. . The marker is not particularly limited, and examples thereof include a pen marker and a laser rmarker.

When the line-shaped mark LM is printed to record defect information, at least one or a plurality of marks LM are arranged along the conveying direction (long side direction) of the double-sided bonding film F105 according to the defect information to be recorded, and the change is changed. Any one or more of the number, interval, size (length, thickness), and color of the linear marks LM. Thereby, defect information can be recorded in the same manner as in the case of printing the dot-shaped mark DM. When a blank K is provided on the linear mark LM, the interval between the blank K is preferably about 3 mm to 5 mm.

In addition, for example, as shown in Figs. 8 (a) to (c), it is possible to print on any of the width direction (short side direction) of the double-sided bonding film F105 and the first printing pattern PT1 and the second printing pattern PT2. Or the third printing pattern PT3 adjacent to each other.

At this time, the control device 16 selects the nozzle portion 13b for printing the third printing pattern PT3 separately from the two nozzle portions 13b for printing the first printing pattern PT1 and the second printing pattern PT2. For the nozzle portion 13b of the third printing pattern PT3, at least one or a plurality of nozzle portions 13b can be selected according to the defect information to be recorded.

That is, for the third printing pattern PT3, the following patterns can be appropriately selected according to the defect information to be recorded: as shown in FIG. 8 (a), adjacent to the first printing pattern PT1 and the second printing pattern PT2 Either is used for printing; as shown in Fig. 8 (b), adjacent to the two sides of the first printing pattern PT1 and the second printing pattern PT2; printing is performed on both sides as shown in Fig. 8 (c) A plurality of prints are arranged in the width direction (short side direction) of the film F105.

In addition, the third printing pattern PT3 can also be printed between the first printing pattern PT1 and the second printing pattern PT2. At this time, printing can be performed on the upstream side, the downstream side, or both sides of the conveyance direction (long-side direction) of the double-sided bonding film F105 with the defect D therebetween.

The third print pattern PT3 can be printed with a dot mark DM or a line mark LM in the same manner as the first print pattern PT1 and the second print pattern PT2. The method of changing the third printing pattern PT3 is also the same as when changing the first printing pattern PT1 and the second printing pattern PT2.

Therefore, for the defect information, more information can be recorded by the combination of the first printing pattern PT1, the second printing pattern PT2, and the third printing pattern PT3 described above.

Regarding the defect information recorded by any of the first, second, and third printing patterns PT1 to PT3, for example, it is necessary to set in advance which printing pattern to be changed and the composition to be changed according to the type of the defect D and the like. Which of the number and interval, the size (diameter, length, thickness), and color of the mark DM (LM) of the changed printing style. This makes it possible to discriminate the type of the defect D and the like according to a predetermined rule.

For example, the type of the defect D can be, for example, a foreign substance type shown in FIG. 9 (a), a bubble type shown in FIG. 9 (b), a bright point type shown in FIG. 9 (c), and a ninth type. Wrinkles and the like shown in Figure (d). Among them, the foreign matter shown in FIG. 9 (a) is a defect D formed by foreign matter mixed into the double-sided bonding film F105. On the other hand, the bubbles shown in Fig. 9 (b) are defects D caused by the occurrence of bubbles in the double-sided bonding film F105. The bubbles sometimes bite the foreign matter into the center when foreign matter is mixed in. On the other hand, the bright spot type shown in FIG. 9 (c) is the defect D generated by the first film F101 as a polarizing film, and the bright spot ( Defect D was observed in the form of light leakage). On the other hand, the wrinkle-type defect D shown in FIG. 9 (d) is a defect D caused by wrinkles generated in the double-sided bonding film F105.

In this embodiment, the number of the marks DM arranged on the upstream side and the number of the marks DM arranged on the upstream side among the marks DM on the downstream side are separated from each other depending on the type of the defect D. For example, the number of the marks DM arranged on the upstream side is three in the case of a foreign object shown in FIG. 9 (a), one in the case of a bubble shown in FIG. 9 (b), and one in FIG. 9 ( The number of bright spots shown in c) is two, and the number of bright spots shown in FIG. 9 (d) is four. This makes it possible to easily identify the type of the defect D from the number of the marks DM arranged on the upstream side.

In addition, in the present invention, it is also possible to record information related to other than the defect D by changing any of the first, second, and third printing patterns PT1 to PT3.

For example, with regard to information other than the defect D, it is possible to record manufacturing information such as manufacturing conditions, manufacturing locations, the frequency of occurrence of the same defect, and the presence or absence of periodicity. In addition, by combining such manufacturing information, it is possible to find out the cause, place, procedure, etc. of the defect D. This makes it possible to reduce the occurrence of defect D by performing maintenance such as maintenance of the cause of defect D.

Here, Fig. 10 (a) shows a situation where a defect D1 is generated in the step (first step) of attaching the protective film (TAC) to both sides of the polarizer (PVA) in the aforementioned polarizing film manufacturing step. . In addition, FIG. 10 (b) shows that after the first step, the defect D2 occurs in the step (second step) of bonding the adhesive and the separator to one of the protective film (TAC) surfaces. Situation.

The defect D1 generated in the first step is a first printing pattern PT1 and a second printing pattern PT2 shown in FIG. 11 (a). On the other hand, for the defect D2 generated in the second step, the printing is, for example, the first printing pattern PT1 and the second printing pattern PT2 shown in FIG. 11 (b).

At this time, regarding the positions of the defects D1 and D2 shown in FIGS. 11 (a) and (b), the first printing pattern PT1 and the second printing pattern PT2 are printed on both sides of the respective defects D1 and D2, and A blank K is provided between the marks DM arranged at a certain interval, so that the positions of the defects D1 and D2 can be marked.

In addition, for the information recorded as defects D1 and D2, the types (defect information) of the defects D1 and D2 are recorded by the first printing pattern PT1 and the second printing pattern PT2, and whether they are in the first step and the second Information on manufacturing defects D1 and D2 (manufacturing information).

Specifically, the types of the defects D1 and D2 are distinguished by the colors of the marks DM constituting the first and second printing patterns PT1 and PT2. For example, the types of the defects D1 and D2 can be identified by the difference in the colors of the marks DM such as the transmission defect (blue), the cross polarization defect (red), and the reflection defect (green).

On the other hand, in the first and second printing patterns PT1 and PT2, it is recorded whether or not it is recorded in the first step and the second by the number of the marks DM on the upstream side (the side where the number of marks DM is smaller) than the blank K. Information on defects D1 and D2 generated by any of the steps. For example, when the number of the marks DM on the upstream side of the first and second printing patterns PT1 and PT2 is one, the defect is D1 generated in the first step; when it is two, the defect is in the second step. The resulting defect D2.

In addition to the first and second print patterns PT1 and PT2 shown in FIG. 11 (b), a third print pattern PT3 shown in FIG. 11 (c) can be printed. Regarding the third printing pattern PT3, the number of marks DM is used to record information (defect information) of the several layers of the polarizing film in which the defect D2 exists. For example, the third printing pattern PT3 shown in FIG. 11 (c) is composed of three marks DM. Therefore, it can be discerned that the defect D2 exists in the third layer (TAC) of the stacking order.

As described above, in the present invention, the aforementioned first, second, and third printing patterns PT3 are printed on the polarizing film, so that the positions of the defects D1 and D2 can be marked and information related to the defects D1 and D2 can be recorded. .

In addition, in the present invention, for example, as shown in the first printing pattern PT1 and the second printing pattern PT2 shown in FIG. 12, it may be indicated by setting the aforementioned blank K instead by reducing the interval between the marks DM. Defect D is a position in the conveyance direction (long-side direction) of the double-sided bonding film F105.

In addition, in the present invention, in order to mark the position of the defect D in the conveying direction (long-side direction) of the double-sided bonding film F105, the blank K (change the interval of the mark DM) can be changed to change the size of the mark DM. Alternatively, the third printing pattern PT3 is used to mark the position of the defect D.

In the present invention, the combination of any one of the first, second, and third printing patterns PT1 to PT3 can surround the defect D as shown in FIGS. 13 (a) to (g), for example. A variety of printing styles.

Among the printing patterns shown in FIG. 13 (a), four marks DM are used to print the first, second, and third printing patterns PT1 to PT3 so as to surround the periphery of the defect D in four directions. On the other hand, in the printing pattern shown in FIG. 13 (b), four marks DM are used to print the first, second, and third printing patterns PT1 to PT3 so as to surround the defect D in three directions. On the other hand, in the printing pattern shown in FIG. 13 (c), the first, second, and third printing patterns PT1 to PT1 are printed so that five marks DM surround the periphery of the defect D with two adjacent edges. PT3. On the other hand, in the printing pattern shown in FIG. 13 (d), six marks DM are used to print the first, second, and third printing patterns PT1 to PT1 so that three adjacent sides surround the periphery of the defect D. PT3. On the other hand, in the printing pattern shown in FIG. 13 (e), fourteen marks DM are used to print around the defect D with four sides. The first, second, and third printing patterns PT1 to PT3 are printed. . On the other hand, in the printing pattern shown in FIG. 13 (f), the first, second, and third printing patterns are printed so that six marks DM surround the periphery of the defect D with two opposite oblique edges. PT1 to PT3. On the other hand, in the printing pattern shown in FIG. 13 (g), the first, second, and third printing patterns PT1 to PT3 are printed so that the periphery of the defect D is surrounded by eight marks DM.

Although the recording device 13 is configured to be disposed downstream of the second defect inspection device 12, the recording device 13 may be disposed downstream of the first defect inspection device 11. In this case, after the defect inspection by the first defect inspection device 11 is performed, the defect information by the recording device 13 can be recorded.

The recording device 13 is not limited to recording defect information after the defect inspection. For example, there are cases where a plurality of recording devices are arranged in a long-distance transport line, distance information is recorded at a certain distance, and distance is corrected based on the recorded distance information. The recording device that records the distance information as described above is arranged, for example, on the upstream side of the first defect inspection device 11.

The recording device 13 is not limited to the printing head 13a having the plurality of nozzle portions 13b arranged in an array. For example, when a traverse printing head is used, When the print head is moved, it is possible to mark defective parts regardless of the shape of the film and the conveying direction.

In addition, the defect marking device 10 is not limited to those constituting a part of the film manufacturing device 100, and a defect marking device that is separate from the film manufacturing device 100 can also be used. Specifically, the double-sided bonding film F105 can be configured to carry out a defect inspection of the double-sided bonding film F105 while the double-sided bonding film F105 sent from the third raw material roll R3 is being conveyed, and the double-sided bonding film can be bonded according to the result of the defect inspection. After marking the defective part of the composite film F105, it is wound up on the core material again.

In addition, in the film manufacturing apparatus 100, the defect portion may not be marked, but the defect portion may be marked in an additional processing step. Specifically, during the conveyance of the double-sided bonding film F105 from the third raw material roll R3 roll, the defect inspection may be performed after one or both sides of the double-sided bonding film F105 are bonded to each other and combined. As a result of the defect inspection of the film manufacturing apparatus 100, the defect site is marked.

In addition, the raw materials to be inspected (inspected objects) of the present invention are not necessarily limited to optical films such as the aforementioned polarizing film, retardation film, and brightness-improving film, as long as the film and paper are marked on the defect site. A strip-shaped raw material is sufficient.

In addition, the inspection object (object to be inspected) of the present invention may be a sheet (batch) obtained by cutting a long strip-shaped raw material. That is, in the present invention, it is not limited to performing a defect inspection of the original material while the aforementioned original material is being transported, and marking a defective portion of the original material based on the result of the defect inspection, and may also be a method of performing a sheet after cutting. Defect inspection, and mark the defect part of the sheet according to the result of the defect inspection. In addition, the sheet may be subjected to processing (for example, bonding of another film, surface treatment of the sheet, etc.) while the defect inspection of the sheet and marking of the defective part of the sheet are performed. Thereby, similarly to the case where the object to be inspected is the original material, the defect marking method (apparatus) of the present invention can be used to mark the position of the defect, and information related to the defect can be recorded. In addition, the present invention is applicable not only to the aforementioned raw materials and sheets, but also to those who can apply the present invention widely.

Claims (20)

    A defect marking method for marking a defective part of an object to be inspected, wherein the first printing pattern and the second printing are adjacent to each other in a direction that intersects with another direction in the plane of the object to be inspected. In the method between patterns, the first printing pattern and the second printing pattern are printed on the surface of the object to be inspected, thereby marking the position of the defect.         The defect marking method according to item 1 of the scope of the patent application, wherein the information related to the aforementioned defect is recorded by using one or both of the aforementioned first printing pattern and the aforementioned second printing pattern.         The defect marking method according to item 2 of the scope of patent application, wherein at least one dot-shaped mark is printed or a plurality of dot-shaped marks are arranged along the aforementioned direction to be printed, as any of the foregoing or The printing style of both.         The defect marking method according to item 2 or item 3 of the scope of patent application, wherein at least one linear mark is printed or a plurality of linear marks are arranged in a direction along the aforementioned direction to be printed, as one of the foregoing Either or both.         The defect marking method as described in item 3 or 4 of the scope of patent application, wherein the printing style of any one or more of the number, interval, size, and color of the foregoing marks is changed to record information related to the foregoing defects .         The defect marking method according to any one of claims 3 to 5 of the scope of the patent application, wherein a printing pattern of at least a part of a plurality of marks arranged along the aforementioned direction is changed to indicate that the aforementioned defect is in the aforementioned one Direction of position.         The defect marking method according to item 6 of the scope of patent application, wherein a space formed by vacating at least a part of a plurality of marks arranged along the aforementioned one direction is arranged at a position adjacent to the aforementioned defect, thereby marking The aforementioned defect is located in the aforementioned one direction.         The defect marking method according to any one of claims 1 to 7 of the scope of patent application, wherein one or both of the first printing pattern and the second printing pattern are adjacent to each other in the other direction. The third printing pattern is printed to record information related to the aforementioned defects.         The defect marking method according to any one of claims 1 to 8 of the scope of application for a patent, wherein, in addition to the printing style of any one of the foregoing, information related to other than the foregoing defect is recorded.         The defect marking method according to any one of claims 1 to 9 of the scope of application for a patent, wherein the aforementioned printing pattern is printed using erasable ink.         The defect marking method according to any one of claims 1 to 10 of the scope of patent application, wherein a defect portion of a long strip-shaped raw material that is transported in the one direction as the inspection object is marked.         The defect marking method according to any one of claims 1 to 10 of the scope of patent application, wherein a defect portion of a sheet obtained by cutting a long strip-shaped raw material as the object to be inspected is marked.         A method for manufacturing a raw material, comprising the steps of: inspecting a defect of a long strip-shaped raw material conveyed in one direction; and using the defect marking method described in the scope of patent application No. 11 to detect a defect portion of the raw material Steps for marking.         A sheet manufacturing method includes the following steps: a step of inspecting a defect obtained by cutting a long strip-shaped raw material; and using the defect marking method described in claim 12 of the patent application for a defect portion of the foregoing sheet Steps for marking.         A defect marking device is provided with a printing device for marking a defective part of an object to be inspected; the printing device is arranged to be arranged at predetermined intervals along another direction intersecting with one direction in the surface of the object to be inspected, And a plurality of printing sections for printing a printing pattern on the surface of the inspection object; and a control section for controlling the driving of the plurality of printing sections; the control section is such that the defect is located in the first adjacent to the other direction. The method between the printing style and the second printing style controls the printing unit for selecting the first printing style and the second printing style to be printed.         The defect marking device according to item 15 of the scope of patent application, wherein the aforementioned control unit is to change the printing unit of one or both of the aforementioned selections in accordance with the information related to the aforementioned defects to be recorded and used to change Either or both of the first printing pattern and the second printing pattern are controlled.         An original material is a long strip-shaped original material with a mark applied to a defect part; the original material has a first printing pattern and a second printing pattern that are printed on the surface by the marks and are adjacent in the short side direction; The position of the defect is marked by placing the defect between the first printing pattern and the second printing pattern.         According to the original material described in item 17 of the scope of patent application, in which the information related to the aforementioned defect is recorded by the printing pattern of any one or both of the first printing pattern and the second printing pattern.         A sheet is provided with a mark on a defective part; the sheet has a first printing pattern and a second printing pattern adjacent to the other direction which intersects with one direction by being printed on the surface by the foregoing mark. Since the defect is located between the first printing pattern and the second printing pattern, the position of the defect is marked.         According to the film described in item 19 of the scope of patent application, the information related to the aforementioned defect is recorded by the printing pattern of any one or both of the first printing pattern and the second printing pattern.