TW201716771A - Sheet inspection apparatus and inspection method - Google Patents

Abstract

Provided is a sheet inspection device which inspects a belt-shaped sheet moving along a moving path, which includes a platform that is movable, and an inspection unit that is supported by the platform and inspects the sheet. The inspection unit includes a light source part that irradiates the sheet with light; and an imaging capturing unit that is configured be able to adjust an image capturing position and an image capturing angle relative to the sheet while the platform is disposed at an arbitrary position in the moving path, and that includes an image capturing part that captures an image of the sheet irradiated with light by the light source part.

Description

Sheet inspection device and inspection method

The priority of Japanese Patent Application No. 2015-217560, filed on Nov. 5, 2015, the content of which is incorporated herein by reference.

The present invention relates to an inspection apparatus and an inspection method for a sheet.

Conventionally, for example, a polarizing plate has a protective film (original sheet) laminated on both sides of a strip-shaped polarizing material (raw sheet), and a protective film on one side thereof is passed through a laminate laminating film. (Original sheet), and further, a phase difference film is passed through an adhesive layer separator (original sheet), and a surface treatment agent layer is laminated on the other side of the protective film. The polarizing plate is in a state in which a layered body (laminated sheet) in which a release liner (original sheet) is laminated on a surface treatment layer, and is inspected by a foreign matter inspection or the like.

As an inspection apparatus used for inspection of such a sheet, for example, an inspection apparatus having an inspection unit having a light source unit and an imaging unit that irradiates light to a laminated sheet, The imaging unit is configured to photograph a laminated sheet that is irradiated with the light, and to illuminate the moving laminated sheet by the light source unit, and to photograph the laminated sheet irradiated with the light by the imaging unit (refer to the patent document) 1, 2). Further, the inspection apparatus is attached to the rear stage of the laminated portion of each of the original sheets, and is disposed so as to be fixed so as not to be laminated sheets after the position and the focus of the image forming portion of the laminated sheet are aligned. The laminated sheet is inspected in a state in which the positional relationship with the imaging unit changes (see Patent Documents 1 and 2). Prior Technical Literature Patent Literature

Patent Document 1: Japanese Patent Laid-Open No. Hei. No. 2005-62165. Patent Document 2: Japanese Patent Laid-Open Publication No. H06-242023

Disclosure of the Invention Problems to be Solved by the Invention However, the above-mentioned inspection of the laminated sheets is carried out in order to prevent the defective products such as foreign matter from being mixed into the laminated sheets from being distributed on the market. However, it is not possible to prevent the deterioration of the yield of the laminated sheet when the defective product is prevented from being distributed on the market. Therefore, it is desirable to find out the cause of the occurrence of the product when it is found to be defective, and to prevent the occurrence of the product defect in the subsequent production of the laminated sheet.

However, in the inspection apparatuses of Patent Documents 1 and 2 which are inspected before shipment at the completion stage, it is difficult to sufficiently ascertain the cause of defects such as foreign matter. Moreover, this situation is not only a problem of laminated sheets, but also has no problem with laminated sheets.

In view of the above circumstances, an object of the present invention is to provide an inspection apparatus and an inspection method for a sheet which can sufficiently specify the occurrence position of a sheet defect and the cause of occurrence thereof. Means to solve the problem

The inspection apparatus for a sheet of the present invention is an inspection apparatus for inspecting a sheet of a sheet-like sheet that moves along a movement path, comprising: a movable gantry; and an inspection portion supported by the gantry and inspecting the sheet The inspection unit includes: a light source unit that emits light to the sheet; and an imaging unit configured to adjust relative to the sheet in a state where the gantry is disposed at any position in the movement path The photographing position and the photographing angle, and photographing the sheet irradiated with light by the light source unit.

Preferably, in the inspection apparatus of the sheet configured as described above, the imaging unit includes: a photographing main body portion; and a position adjusting unit that moves the photographing main body portion relative to the sheet to adjust the relative photographing position; and an angle The adjustment unit may rotate the photographing main body portion with respect to the sheet to adjust the relative photographing angle.

In the inspection apparatus of the above-described sheet, the position adjustment unit may be configured to move the imaging main body portion in the first direction and the second direction perpendicular to the first direction with respect to the sheet. The angle adjustment unit is configured to rotate the imaging main body portion around the first rotation axis and the second rotation axis perpendicular to the first rotation axis with respect to the sheet.

In the above-described sheet inspection apparatus, the position adjustment unit may include a first position adjustment unit that allows the imaging main unit to move in a direction approaching and away from the sheet; and a second position The adjustment unit moves the imaging main body portion in a direction perpendicular to a moving direction formed by the first position adjusting unit, and the angle adjusting unit includes a first angle adjusting unit that causes the imaging main body unit to face the piece The material rotates about the first rotation axis; and the second angle adjustment unit rotates the imaging main body portion around the second rotation axis.

Preferably, the inspection apparatus of the sheet configured as described above further includes a control unit that is electrically connected to the imaging unit and obtains an inspection result from the imaging unit, wherein the control unit is configured to be responsive to the gantry Move while moving.

The method for inspecting a sheet of the present invention is a method of inspecting the sheet using the inspection apparatus for the sheet.

Hereinafter, an inspection apparatus and an inspection method for a sheet according to an embodiment of the present invention will be described with reference to the drawings. Further, in FIGS. 1 to 7, 10 to 13, and 15, the conveyance direction of the sheet is indicated by a hollow arrow.

First, a sheet conveying apparatus including the inspection apparatus for a sheet of the embodiment will be described.

As shown in Fig. 1 and Fig. 2, the conveying device 1 of the sheet 40 of the present embodiment includes a plurality of feeding portions 3, and the original sheets 60 are fed from a plurality of rolls 61, and the plurality of rolls 61 are The original sheet 60 as the strip-shaped sheet 40 is wound; the laminated portion 7 is laminated to each of the original sheets 60 to be formed to form a laminated sheet 50 as the sheet 40; the winding portion 9 is laminated The sheet 50 is taken up and recovered as a roll body 51; and the inspection device 20 is movable and the sheet 40 can be inspected. In the present embodiment, the two inspection devices 20 are provided in pairs along the width direction of the sheet 40, and the pair of inspection devices 20 are configured as the inspectable sheet 40.

The conveyance device 1 is formed by laminating the original sheets 60 fed from the delivery unit 3 in the laminate unit 7 to form a laminated sheet 50, and the laminated sheet 50 is wound up by the winding unit 9. Further, when the sheet 40 is moved, the sheet 40 is inspected by the inspection device 20.

In the present embodiment, since the two inspection devices 20 have the same configuration, only one of the inspection devices 20 (the inspection device 20 on the right side of FIG. 2) will be described below. As shown in FIGS. 2 and 3, the inspection device 20 is an inspection device 20 that can inspect the sheet 40 of the strip-shaped sheet 40 that moves along the movement path, and is provided with: a movable table 21; and an inspection portion 22 It is supported by the aforementioned gantry 21 and inspects the aforementioned sheet 40. The inspection unit 22 includes a light source unit 23 that emits light to the sheet 40, and an imaging unit 25 that is configured to be adjustable in a state in which the gantry 21 is placed at any position in the movement path of the sheet 40. The sheet 40 is irradiated with light by the light source unit 23 at a photographing position and a photographing angle of the sheet 40.

Further, the inspection device 20 of the sheet 40 further includes a control unit 37 that is electrically connected to the imaging unit 25 and acquires an inspection result from the imaging unit 25, and the control unit 37 is configured to be responsive to the gantry 21 Move while moving.

The gantry 21 is configured to be movable to move the inspection position, and is a gantry that moves to an arbitrary position in the movement path of the sheet 40. By moving the gantry 21 together with the inspection unit 22, the inspection apparatus 20 is moved. In the state shown in Fig. 1, the gantry 21 is attached to the frame 5 of the conveying device 1 in the moving path of the sheet 40. For example, the gantry 21 is attached to the frame 5 by bolts or the like. In FIG. 1, the state in which the gantry 21 is attached to the frame 5 in the vicinity of the delivery part 3 of one of the two delivery parts 3 is illustrated.

The gantry 21 is formed to be sized to be transportable by an operator. Thus, the movement of the gantry 21 is facilitated by forming the gantry 21 so as to be transportable.

As shown in FIGS. 2 and 3, the gantry 21 has a main body portion 21a which is an L-shaped portion constituting the main body, and a reinforcing portion 21b that reinforces the main body portion 21a. One end of the L-shape of the main body portion 21a is fixed to the side surface of the frame 5 by a bolt or the like, and the other end portion protrudes inward from the side surface side (outer side) of the frame 5. The light source unit 23 is fixed to one end of the L-shape. The imaging unit 25 is fixed to the other end of the L-shape. The reinforcing portion 21b is formed as a side surface portion disposed on the main body portion 21a to reinforce the main body portion 21a.

The inspection unit 22 has a light source unit 23 that irradiates the sheet 40 with light, and an imaging unit 25. The imaging unit 25 is configured to adjust the relative imaging position and imaging angle with respect to the sheet 40 in a state where the gantry 21 is placed at any position on the movement path of the sheet 40, and is configured to be imaged as described above. The light source unit 23 irradiates the aforementioned sheet 40 of light.

The light source unit 23 is an element that irradiates the sheet 40 with light. The light source unit 23 has a light source main portion 23a and a connecting portion 23b connected to the gantry 21, and the connecting portion 23b is connected to one end portion of the main body portion 21a of the gantry 21. The light source unit 23 is configured to irradiate the sheet 40 with light from one side (here, the lower surface) side of the sheet 40.

The imaging unit 25 is configured to be capable of adjusting the relative imaging position and imaging angle with respect to the sheet 40, and to photograph the sheet 40 that is irradiated with light by the light source unit 23. The above-described photographing angle is an angle between the photographed surface (here, the upper surface) of the sheet 40 and the photographing direction of the photographing portion 25. In the present embodiment, the imaging unit 25 is configured to photograph the sheet 40 that is irradiated with light from one side (here, the lower surface) side of the sheet 40 from the other surface (here, the upper surface) side.

The imaging unit 25 is configured to be capable of adjusting the relative imaging position and imaging angle with respect to the sheet 40. Specifically, as shown in FIGS. 4 to 7 , the imaging unit 25 includes an imaging main unit 27 and a position adjusting unit 31 that can move the imaging main unit 27 relative to the sheet 40 to adjust the relative imaging position; The angle adjusting unit 33 adjusts the relative imaging angle by rotating the imaging unit 27 with respect to the sheet 40.

The photographing main body portion 27 is an element constituting the main body of the photographing sheet 40. As such an imaging main body unit 27, a conventional camera or the like can be employed.

The position adjustment unit 31 is an element that can adjust the above-described relative imaging position by moving the imaging body unit 27 relative to the sheet 40. Specifically, the position adjustment unit 31 is configured to move the imaging main unit 27 in one direction (first direction) and in a direction (second direction) perpendicular to the one direction (first direction).

More specifically, the position adjustment unit 31 includes a first position adjustment unit 31a that allows the imaging main unit 27 to approach and move away from the sheet 40 (the first direction, here the vertical direction, that is, the sheet) The material 40 moves up in the vertical direction; and the second position adjusting portion 31b can make the imaging body portion 27 in a direction perpendicular to the moving direction formed by the first position adjusting portion 31a (the second direction, here is the horizontal The direction, that is, the width direction of the sheet 40) moves upward.

Referring to FIGS. 5 and 7 and as shown in FIGS. 8A to 8C, the first position adjusting unit 31a has two platform portions 31aa and 31ab which are movable relative to each other, and a movement amount adjusting portion 31ac for adjusting The relative movement amount of the two platform portions 31aa and 31ab; and the flat bottom surface 31ad. The movement amount adjustment unit 31ac is a knob unit that can adjust the amount of movement by rotating it. As the first position adjusting unit 31a, a mechanism in which the two platform portions 31aa and 31ab are coupled by a rack and pinion mechanism can be used to linearly move one of the sides with respect to the other side. As such a first position adjusting unit 31a, a coarse jog-and-pinion rack type platform (for example, model number TAR-38801D, etc.) manufactured by SIGMAKOKI Co., Ltd. can be cited. The first position adjusting portion 31a is disposed such that the two platform portions 31aa and 31ab can move relative to each other in a direction (here, a vertical direction) that is close to and away from the sheet 40.

Further, the second position adjusting unit 31b has two platform portions 31ba and 31bb that are movable relative to each other, and a movement amount adjusting unit 31bc for adjusting the relative movement amount of the two platform portions 31ba and 31bb; and a flat bottom surface 31bd. . The movement amount adjustment unit 31bc is a knob unit that can adjust the amount of movement by rotating it. As the second position adjusting unit 31b, a mechanism in which the two platform portions 31ba and 31bb are coupled by the rack and pinion mechanism can be used to linearly move one of the sides with respect to the other side. As the above-described second position adjusting unit 31b, a coarse jog-and-pinion rack type platform (for example, model number TAR-38801D or the like) manufactured by Sigma Optical Co., Ltd. can be cited as described above. The second position adjusting portion 31b is disposed such that the two platform portions 31ba and 31bb are perpendicular to the moving direction formed by the first position adjusting portion 31a (here, the horizontal direction, that is, the width of the sheet 40) Moving in opposite directions to each other.

In the present embodiment, the first and second position adjusting units 31a and 31b are two position adjusting units having the same configuration and arranged to be inclined by 90° with respect to each other.

As shown in FIG. 5 and FIG. 7, the platform portion 31ab of one of the first position adjusting portions 31a is a platform portion 31ba that is coupled to one of the second position adjusting portions 31b by a connecting portion (not shown). Further, the platform portion 31aa on the other side of the first position adjusting portion 31a is attached to the gantry 21 by a connecting portion (not shown).

The angle adjustment unit 33 is an element that can adjust the above-described relative imaging angle by rotating the imaging body unit 27 relative to the sheet 40. Further, the change in the imaging angle corresponds to the change in the posture of the imaging main body unit 27. Specifically, the angle adjustment unit 33 is configured such that the imaging main unit 27 is centered on any one of the rotation axes (first rotation axis) R1 and the rotation axis (second rotation axis) R2 that is perpendicular to the rotation axis R1. Rotation (see Figures 4 and 6).

More specifically, the angle adjustment unit 33 includes a first angle adjustment unit 33a and a second angle adjustment unit 33b. The first angle adjustment unit 33a is a rotation axis R1 (here, parallel to the first angle adjustment unit 33a). The bottom surface 33ad is parallel to the rotation axis of the width direction of the sheet 40, that is, the rotation axis parallel to the width direction of the sheet 40, and the imaging body portion 27 is rotated relative to the sheet 40. The angle adjustment unit 33b is a rotation axis R2 perpendicular to the rotation axis R1 of the first angle adjustment unit 33a (here, a flat bottom surface 33bd parallel to the second angle adjustment unit 33b, and the first angle adjustment unit. The rotation axis of the rotation axis R1 of 33a, that is, the rotation axis perpendicular to the sheet 40, is centered, and the imaging body portion 27 is rotated relative to the sheet 40.

Referring to FIGS. 5 and 7 and as shown in FIGS. 9A to 9C, the first angle adjusting portion 33a has two platform portions 33aa and 33ab that are rotatable relative to each other, and a rotation amount adjusting portion 33ac for adjusting two. The relative rotation amount of the platform portions 33aa and 33ab; and the flat bottom surface 33ad. The rotation amount adjustment unit 33ac is a knob unit that can adjust the amount of rotation by rotating it. As such a first angle adjustment unit 33a, a gonio stage in which two platform portions 33aa and 33ab are connected can be used to move one of the sides while drawing an arc with respect to the other side. As the first angle adjusting unit 33a, an α-axis angle measuring table (for example, model numbers GOH-60A115, GOH-60A50, etc.) manufactured by Sigma Optical Co., Ltd. can be cited. The first angle adjusting portion 33a is disposed such that the two platform portions 33aa and 33ab are parallel to the bottom surface of the land portion 33aa (that is, the bottom surface of the first angle adjusting portion 33a) 33ad, and can be parallel to the sheet 40. The rotation axis R1 in the width direction (that is, the rotation axis parallel to the width direction of the sheet 40 as described above) rotates relative to each other around the center.

Further, the second angle adjusting portion 33b has two platform portions 33ba and 33bb that are rotatable relative to each other, and a rotation amount adjusting portion 33bc for adjusting the relative rotation amount of the two platform portions 33ba and 33bb. The rotation amount adjustment unit 33bc is a knob unit that can adjust the amount of rotation by rotating it. As such a second angle adjustment unit 33b, a goniometer that connects the two platform portions 33ba and 33bb can be used to move one of the sides while drawing an arc with respect to the other side. As the above-described second angle adjusting unit 33b, an α-axis angle measuring table (for example, model numbers GOH-60A115, GOH-60A50, etc.) manufactured by Sigma Optical Co., Ltd. can be cited as described above. The second angle adjusting portion 33b is disposed such that the two platform portions 33ba and 33bb are parallel to the bottom surface of the land portion 33ba (that is, the bottom surface of the second angle adjusting portion 33b) 33bd, and can be combined with the first angle adjusting portion. The rotation axis R2 of the rotation axis R1 of 33a (i.e., the rotation axis perpendicular to the sheet 40 as described above) rotates relative to each other around the center.

In the present embodiment, the first and second angle adjusting portions 33a and 33b are two angle adjusting portions having the same configuration and arranged to be inclined by 90 degrees with respect to each other.

As shown in FIG. 5 and FIG. 7, the platform portion 33ab of one of the first angle adjustment portions 33a is a platform portion 33ba that is coupled to one of the second angle adjustment portions 33b by a connection portion (not shown). Further, the platform portion 33aa on the other side of the first angle adjustment portion 33a is connected to the platform portion 31bb on the opposite side of the first position adjustment portion 31a from the second position adjustment portion 31b by a connection portion (not shown).

The adjustment of the imaging position and the imaging angle with respect to the imaging main unit 27 of the sheet 40 by the position adjusting unit 31 and the angle adjusting unit 33 will be described below.

As shown in FIG. 10A to FIG. 10C, when the first position adjusting unit 31a is actuated by rotating the movement amount adjusting portion 31ac of the first position adjusting portion 31a, the other platform portion 31ab is attached to the gantry 21 The platform portion 31aa moves in the vertical direction as described above. With this movement, the second position adjustment unit 31b, the angle adjustment unit 33, and the imaging body unit 27 move in the vertical direction as described above. Thereby, the photographing position of the photographing main body portion 27 with respect to the sheet 40 in the direction perpendicular to the sheet 40 (that is, the shortest distance L between the web 40 and the center of the photographing main body portion 27) can be adjusted.

As shown in FIG. 11A to FIG. 11C, when the second position adjusting unit 31b is actuated by rotating the movement amount adjusting portion 31bc of the second position adjusting portion 31b, the other platform portion 31bb is connected to the first position. The land portion 31ba of the second position adjusting portion 31b on the land portion 31ab of the adjusting portion 31a moves in the width direction of the sheet 40 as described above. Along with this movement, the angle adjustment unit 33 and the imaging body unit 27 move in the width direction of the sheet 40 as described above. Thereby, the photographing position of the photographing main body portion 27 with respect to the sheet 40 in the width direction of the sheet 40 can be adjusted.

As shown in FIG. 12A to FIG. 12C, when the first angle adjustment unit 33a is actuated by rotating the rotation amount adjustment unit 33ac of the first angle adjustment unit 33a, the other platform portion 33ab is connected to the second position. The platform portion 33aa of the first angle adjustment portion 33a on the land portion 31bb of the adjustment portion 31b is rotated about the rotation axis R1 parallel to the width direction of the sheet 40 as described above. With the rotation, the second angle adjustment unit 33b and the imaging body unit 27 rotate around the rotation axis R1 parallel to the width direction of the sheet 40 as described above. Thereby, it is possible to adjust the imaging angle component in the imaginary plane perpendicular to the sheet 40 and perpendicular to the width direction of the sheet 40 (parallel to the length direction) in the photographing angle of the photographing body portion 27 with respect to the sheet 40. Θ1.

As shown in FIG. 13A to FIG. 13C, when the second angle adjustment unit 33b is actuated by rotating the rotation amount adjustment unit 33bc of the second angle adjustment unit 33b, the other platform portion 33bb is coupled to the first angle. The platform portion 33ba of the second angle adjustment portion 33b on the land portion 33ab of the adjustment portion 33a is parallel to the bottom surface 33bd of the land portion 33ba and perpendicular to the rotation axis of the rotation axis R1 of the first angle adjustment portion 33a. (ie, perpendicular to the axis of rotation of the sheet 40) R2 is centered. Along with this rotation, the photographing main body portion 27 is parallel to the bottom surface 33bd of the land portion 33ba as described above, and is perpendicular to the rotation axis of the rotation axis R1 of the first angle adjustment portion 33a (that is, perpendicular to the rotation of the sheet 40). The axis) R2 is centered for rotation. Thereby, it is possible to adjust the photographing angle component θ2 in the imaginary plane parallel to the sheet 40 in the photographing angle of the photographing main body portion 27 with respect to the sheet 40.

The imaging body portion can be freely adjusted by combining the above-described movement operation of the imaging main body portion 27 by the first position adjusting portion 31a and the moving operation of the imaging main body portion 27 by the second position adjusting portion 31b. The position of 27 relative to the photographing position of the sheet 40.

The imaging body portion can be freely adjusted by combining the above-described rotation operation of the imaging main body portion 27 by the first angle adjustment portion 33a and the rotation operation of the imaging main body portion 27 by the second angle adjustment portion 33b. The angle of shooting of 27 relative to sheet 40.

The control unit 37 is an element that electrically connects the imaging unit 25, transmits the result of the inspection by the imaging unit 25 as electronic data, and acquires the transmitted inspection result. Further, the control unit 37 is configured to be movable, whereby the control unit 37 is moved in accordance with the movement of the gantry 21. As such a control unit 37, a computer or the like including a central processing unit (CPU) can be cited.

Next, in the conveying device 1 of the sheet 40 of the present embodiment, an inspection method for inspecting the moving sheet 40 by using the inspection device 20 will be described below.

First, the inspection device 20 is moved and the gantry 21 is attached to the frame 5 of the conveying device 1. For example, as shown in FIG. 1, the gantry 21 of the inspection apparatus 20 is attached to the frame 5 in the vicinity of the delivery part 3 of the original sheet 60 (sheet 40).

After mounting the gantry 21 (that is, in a state where the gantry 21 is placed at any position on the movement path of the sheet 40), the position adjustment unit 31 and the angle adjustment unit 33 adjust the relative position of the imaging unit 25 with respect to the original sheet. 60 shooting position and shooting angle.

Specifically, as described above, the imaging position of the imaging main body unit 27 in the direction in which the first position adjusting unit 31a approaches the original sheet 60 and the direction away from each other is adjusted (see FIG. 10A to FIG. 10A). 10C) The imaging position adjustment of the imaging main unit 27 in the width direction of the original sheet 60 by the second position adjusting unit 31b (see FIGS. 11A to 11C) and the first angle adjusting unit 33a Adjustment of the photographing angle component θ1 of the photographing main body portion 27 with respect to the original sheet 60 perpendicular to the original sheet 60 and on an imaginary plane perpendicular to the width direction of the original sheet 60 (refer to FIGS. 12A to 12C ), and The adjustment of the imaging angle component θ2 of the imaging main body portion 27 on the virtual plane parallel to the original sheet 60 by the second angle adjusting portion 33b (see FIGS. 13A to 13C) is combined. The photographing position and the photographing angle of the photographing main body portion 27 with respect to the original sheet 60 are adjusted, whereby the photographing target region and the focus of the photographing main body portion 27 can be formed into an appropriate region and focus.

In this state, the original sheet 60 can be fed out from the roller body 61 by the delivery unit 3, and the original sheet 60 moved by the light source unit 23 can be irradiated with light, whereby the imaging unit 25 can be used. The photographing main body unit 27 photographs the original sheet 60 irradiated with light to perform inspection.

The obtained inspection result is transmitted as electronic data to the control unit 37 by the imaging unit 25.

In this manner, the inspection device 20 can be moved to the frame 5 near the delivery portion 3, and the original sheet 60 can be inspected at a position after the inspection device 20 is moved.

In addition, the original sheet 60 is inspected in this manner, and the original sheet 60 that has been inspected and the original sheet 60 fed from the other delivery unit 3 are laminated by the laminated portion 7 to form a laminated sheet 50 (sheet). The material 40) is obtained by winding up the formed laminated sheet 50 by the winding unit 9 and forming the roll body 51.

Further, in the moving path of the sheet 40, when the sheet 40 is to be inspected at other positions, the inspection device 20 can be removed from the frame 5 in the vicinity of the take-up portion 3, for example, the inspection device can be 20 moves to a frame (not shown) in the vicinity of the laminated portion 7, and the inspection device 20 is attached to the frame in the same manner as described above, and the laminated sheet 50 is inspected at a position after the inspection device 20 is moved.

The inspection apparatus 20 of the sheet 40 of the present embodiment described above and the inspection method of the sheet 40 have the following advantages.

That is, the inspection device 20 of the sheet 40 of the present invention is an inspection device that can inspect the sheet 40 of the strip-shaped sheet 40 that moves along the movement path, and includes: a movable table 21; and an inspection portion 22 The inspection unit 22 has a light source unit 23 that emits light to the sheet 40, and an imaging unit 25 that is configured to be disposed in the movement path of the sheet 40. In a state of an arbitrary position, the relative imaging position and imaging angle with respect to the sheet 40 are adjusted, and the sheet 40 irradiated with light by the light source unit 23 is imaged.

According to this configuration, the inspection device 20 can be moved to any position in the movement path of the sheet 40 by moving the gantry 21 together with the inspection portion 22. Then, the photographing position and the photographing angle of the photographing portion 25 with respect to the sheet 40 can be adjusted at the position after the inspection device 20 is moved as described above. Thereby, the inspection of the sheet 40 can be performed by appropriately aligning the subject region and the focus of the imaging unit 25. Therefore, it is possible to sufficiently specify the occurrence position of the sheet defect at which position and what causes the occurrence of the defect.

In the inspection apparatus 20 of the sheet 40 of the present embodiment, the imaging unit 25 includes: a photographing main body unit 27; and a position adjusting unit 31 that allows the photographing main body portion 27 to move relative to the sheet 40 to adjust the relative photographing position; The adjustment portion 33 can rotate the imaging body portion 27 with respect to the sheet 40 to adjust the above-described relative imaging angle.

According to this configuration, the imaging unit 27 can be moved relative to the sheet 40 by the position adjusting unit 31 to adjust the relative imaging position, and the imaging unit 27 can be made relative to the sheet 40 by the angle adjusting unit 33. Rotate to adjust the above relative shooting angle. Thereby, since the photographing position adjustment and the photographing angle adjustment of the photographing main body portion 27 with respect to the sheet 40 can be independently performed, the photographing position adjustment and the photographing angle adjustment can be performed in combination, so that the photographing main body portion 27 can be adjusted in more detail. The shooting position and shooting angle with respect to the sheet 40. Therefore, the imaging position and the imaging angle of the imaging main unit 27 can be adjusted to a desired imaging position and imaging angle without being affected by the arrangement state of the gantry 21, whereby the occurrence position of the sheet defect can be sufficiently specified. cause.

In the inspection apparatus 20 of the sheet 40 of the present embodiment, the position adjustment unit 31 is configured to move the imaging main unit 27 in the first direction with respect to the sheet 40 and in the second direction perpendicular to the first direction, and to adjust the angle. The portion 33 is configured to rotate the imaging body portion 27 about the first rotation axis R1 and the second rotation axis R2 perpendicular to the first rotation axis R1 with respect to the sheet 40.

According to this configuration, the imaging position and the imaging angle of the imaging body unit 27 can be adjusted in more detail.

In the inspection apparatus 20 of the sheet 40 of the present embodiment, the position adjustment unit 31 includes a first position adjustment unit 31a that allows the imaging main unit 27 to move in a direction approaching and away from the sheet 40; and a second position The adjustment unit 31b can move the imaging main unit 27 in a direction perpendicular to the moving direction formed by the first position adjusting unit 31a. The angle adjusting unit 33 has the first angle adjusting unit 33a and the imaging main unit 27 is opposed to each other. The sheet 40 is rotated about the first rotation axis R1, and the second angle adjustment unit 33b rotates the imaging body unit 27 around the second rotation axis R2.

According to this configuration, the movement of the main body unit 27 by the first position adjusting unit 31a and the movement of the main body unit 27 by the second position adjusting unit 31b can be freely adjusted. The photographing position of the main body portion 27 with respect to the sheet 40 is taken. Further, the imaging body portion can be freely adjusted by combining the rotation operation of the imaging main body portion 27 by the first angle adjustment portion 33a and the rotation operation of the imaging main body portion 27 by the second angle adjustment portion 33b. The angle of shooting of 27 relative to sheet 40. Therefore, the photographing position and the photographing angle of the photographing main body portion 27 can be adjusted in further detail.

In the inspection apparatus 20 of the sheet 40 of the present embodiment, the light source unit 23 is disposed on the lower side of the sheet 40, and the imaging unit 25 is disposed on the upper side of the sheet 40.

According to this configuration, it is possible to suppress the occurrence of foreign matter or the like falling on the imaging unit 25, and it is therefore possible to suppress a decrease in the inspection accuracy due to adhesion of the foreign matter to the imaging unit 25.

The inspection apparatus 20 of the sheet 40 of the present embodiment further includes a control unit 37 that is electrically connected to the imaging unit 25 and acquires an inspection result from the imaging unit 25, and the control unit 37 is configured to be movable in response to the movement of the gantry 21. .

According to this configuration, the control unit 37 can be moved in response to the movement of the gantry 21 (that is, the movement of the imaging unit 25), so that the control unit 37 can obtain the inspection result from the imaging unit 25, so that it can be used for electrical connection. The wiring of the imaging unit 25 and the control unit 37 is shortened in accordance with the amount of the portion. Moreover, since the degree of freedom in arrangement of the imaging unit 25 and the control unit 37 is increased, both of them can be moved more easily, whereby the sheet 40 can be more easily inspected. Moreover, the inspection results at a plurality of positions can be obtained more easily. Further, when the inspection result is obtained at a plurality of positions, the plurality of inspection results obtained can be compared, and the position at which the foreign matter is more likely to be generated is specified, so that the sheet 40 can be specified more appropriately. The location in the movement path that should be checked. In this way, the inspection device 20 is made to form a more useful device.

The method of inspecting the sheet 40 of the present embodiment is a method of inspecting the sheet 40 using the inspection device 20 of the sheet 40. According to the configuration described above, the inspection of the sheet 40 by the inspection device 20 using the sheet 40 can sufficiently specify the occurrence position of the sheet defect and the cause of the occurrence as described above.

In the inspection method of the sheet 40 of the present embodiment, the inspection apparatus 20 of the sheet 40 is used, and the inspection apparatus 20 is moved to a predetermined position on the movement path to inspect the sheet 40. According to the configuration described above, it is possible to sufficiently specify the occurrence position of the sheet defect and the cause of the occurrence by inspection using the inspection device 20.

According to the conveying device 1 in which the inspection device 20 of the sheet 40 of the present embodiment is provided, the sheet 40 can be conveyed while inspecting the sheet 40 by the inspection device 20. In this way, the sheet 40 can be conveyed while being inspected by the inspection device 20, and the position and the cause of occurrence of the sheet defect can be sufficiently specified and the sheet 40 can be conveyed.

According to the method of conveying the sheet 40 using the inspection apparatus 20 of the sheet 40 of the present embodiment, the sheet 40 can be conveyed while inspecting the sheet 40. In this way, the sheet 40 can be conveyed while being inspected by the inspection device 20, and the position and the cause of occurrence of the sheet defect can be sufficiently specified and the sheet 40 can be conveyed.

As described above, according to the present embodiment, it is possible to provide an inspection apparatus 20 and an inspection method for the sheet 40 capable of sufficiently specifying the occurrence position of the sheet defect and the cause of the occurrence.

The inspection apparatus 1 and the inspection method of the sheet 40 of the present embodiment have the above-described configuration and have the above-described advantages. However, the present invention is not limited to the above embodiment, and can be carried out within the scope of the intention of the present invention. Appropriate design changes.

For example, as the sheet 40 inspected by the inspection device 20, a laminated sheet (polarizing plate) 50 as shown in Fig. 14 can also be used. The laminated sheet 50 shown in Fig. 14 has a separator 60a as a primary sheet, a retardation film 60b, a protective film 60c, a polarizing member 60d, a protective film 60e, and a release liner 60f. Each of the original sheets is sent out from the respective rolls by the feeding portion and supplied to the laminated portion, and laminated in the laminated portion to form the laminated sheet 50. Further, it is formed so as to take up the formed laminated sheet 50 and collect it. It is also possible to adopt the following aspect: in the movement path of any of the original films 60a to 60f and the laminated sheet 50, the inspection device 20 is moved to an arbitrary position and moved after the inspection device 20 is moved. Check any of the sheets in position.

Further, for example, the inspection device 20 may be provided on the conveying device 1 as shown in FIG. The conveying device 1 is configured such that after the sheet 63 (sheet 40) is formed, the sheet 63 is stretched over the tension roller 79 and moved, and is taken up by the winding portion 9 to be recovered as a roller body 65. The sheet 63 (sheet 40) is fed from the roll body 61 in which the original sheet 60 as the sheet 40 is wound by the delivery unit 3, and is fed by the first drying unit 71 by the first drying unit 71. The original sheet 60 that has been fed out is dried, and after corona treatment is performed by a corona treatment unit 73, the coating liquid is applied onto the original sheet 60 by the coating portion 75, and the second drying portion is applied. 77 is dried to form a coating film on the original sheet 60. In this case, the inspection apparatus 20 can be moved to an arbitrary position on the movement path of the original sheet 60 and the sheet 63 which forms the coating film, and each sheet can be inspected.

1‧‧‧Transporting device
3‧‧‧Send out
5‧‧‧Frame
7‧‧‧Layered Department
9‧‧‧Winding Department
20‧‧‧Checking device
21‧‧‧ 台台
21a‧‧‧ Body Department
21b‧‧‧Reinforcement Department
22‧‧‧Inspection Department
23‧‧‧Light source department
23a‧‧‧Light source body
23b‧‧‧Connecting Department
25‧‧ ‧Photography Department
27‧‧‧Photographing the body
31‧‧‧ Position Adjustment Department
31a‧‧‧1st position adjustment department
31aa, 31ab, 31ba, 31bb, 33aa, 33ab, 33ba, 33bb‧‧‧ Platform Department
31ac, 31bc‧‧‧Mobile Adjustment Department
31ad, 31bd, 33ad, 33bd‧‧‧ bottom
31b‧‧‧2nd Position Adjustment Department
33‧‧‧ Angle Adjustment Department
33a‧‧‧1st angle adjustment department
33ac, 33bc‧‧‧Rotation Adjustment Unit
33b‧‧‧2nd angle adjustment department
37‧‧‧Control Department
40, 63‧‧‧ sheets
50‧‧‧Laminated sheets
60‧‧‧Original sheet
51, 61, 65‧‧ ‧ roll body
60a‧‧‧Isolated parts
60b‧‧‧ phase difference film
60c, 60e‧‧‧ protective film
60d‧‧‧ polarizer
60f‧‧‧ release liner
71‧‧‧1st Drying Department
73‧‧‧Corona Treatment Department
75‧‧‧ Coating Department
77‧‧‧2nd Drying Department
79‧‧‧ Tension roller
A, B, C, D‧‧‧ directions
L‧‧‧ distance
R1, R2‧‧‧Rotation axis θ1, θ2‧‧‧ shooting angle component

Fig. 1 is a schematic side view showing a sheet conveying apparatus including an inspection apparatus for a sheet according to an embodiment of the present invention. Fig. 2 is a schematic front view showing the periphery of the inspection apparatus in the direction A of Fig. 1; Fig. 3 is a schematic top view showing the periphery of the inspection apparatus in the direction B of Fig. 2; Fig. 4 is a schematic side view showing the periphery of the inspection apparatus in the direction C of Fig. 3; Fig. 5 is a schematic top view showing a state in which respective portions are arranged in the inspection device of Fig. 4; Fig. 6 is a schematic top view showing the periphery of the inspection apparatus in the direction D of Fig. 4; Fig. 7 is a schematic top view showing a state in which respective portions are arranged in the inspection apparatus of Fig. 6; FIG. 8A is a schematic side view showing an imaging position adjustment operation of the first position adjustment unit and the second position adjustment unit. 8B is a schematic side view showing an imaging position adjustment operation of the first position adjustment unit and the second position adjustment unit. 8C is a schematic side view showing an imaging position adjustment operation of the first position adjustment unit and the second position adjustment unit. FIG. 9A is a schematic side view showing an imaging angle adjustment operation of the first angle adjustment unit and the second angle adjustment unit. FIG. 9B is a schematic side view showing an imaging angle adjustment operation of the first angle adjustment unit and the second angle adjustment unit. FIG. 9C is a schematic side view showing an imaging angle adjustment operation of the first angle adjustment unit and the second angle adjustment unit. FIG. 10A is a schematic side view showing a state in which the imaging position of the photographing main body portion with respect to the sheet is adjusted by the first position adjusting portion. FIG. 10B is a schematic side view showing a state in which the imaging position of the photographing main body portion with respect to the sheet is adjusted by the first position adjusting portion. FIG. 10C is a schematic side view showing a state in which the imaging position of the photographing main body portion with respect to the sheet is adjusted by the first position adjusting portion. FIG. 11A is a schematic side view showing a state in which the imaging position of the photographing main body portion with respect to the sheet is adjusted by the second position adjusting portion. FIG. 11B is a schematic side view showing a state in which the imaging position of the photographing main body portion with respect to the sheet is adjusted by the second position adjusting portion. 11C is a schematic side view showing a state in which the imaging position of the photographing main body portion with respect to the sheet is adjusted by the second position adjusting portion. FIG. 12A is a schematic side view showing a state in which the imaging angle of the imaging main body portion with respect to the sheet is adjusted by the first angle adjusting portion. FIG. 12B is a schematic side view showing a state in which the imaging angle of the imaging main body portion with respect to the sheet is adjusted by the first angle adjusting portion. FIG. 12C is a schematic side view showing a state in which the imaging angle of the photographing main body portion with respect to the sheet is adjusted by the first angle adjusting portion. FIG. 13A is a schematic side view showing a state in which the imaging angle of the imaging main body portion with respect to the sheet is adjusted by the second angle adjusting portion. FIG. 13B is a schematic side view showing a state in which the imaging angle of the photographing main body portion with respect to the sheet is adjusted by the second angle adjusting portion. 13C is a schematic side view showing a state in which the imaging angle of the imaging main body portion with respect to the sheet is adjusted by the second angle adjusting portion. Fig. 14 is a schematic side view showing a sheet to which an example of the inspection apparatus of the embodiment is applied. Fig. 15 is a schematic side view showing another sheet conveying apparatus including the inspection apparatus of the embodiment. Slightly side view

5‧‧‧Frame

20‧‧‧Checking device

21‧‧‧ 台台

21a‧‧‧ Body Department

21b‧‧‧Reinforcement Department

22‧‧‧Inspection Department

23‧‧‧Light source department

25‧‧ ‧Photography Department

37‧‧‧Control Department

40‧‧‧Sheet

60‧‧‧Original sheet

61‧‧‧ Roll body

B‧‧‧ directions

Claims (6)

A sheet inspection apparatus capable of inspecting a strip-shaped sheet that moves along a moving path, the sheet inspection apparatus comprising: a movable gantry; and an inspection portion supported by the gantry and inspecting the sheet, the aforementioned The inspection unit includes: a light source unit that emits light to the sheet; and an imaging unit configured to adjust a relative imaging position with respect to the sheet in a state where the gantry is placed at any position in the movement path And photographing the angle, and photographing the sheet that is irradiated with light by the light source unit. The apparatus for inspecting a sheet according to claim 1, wherein the photographing unit has: a photographing main body portion; and a position adjusting unit that moves the photographing main body portion relative to the sheet to adjust the relative photographing position; and an angle adjusting portion, The aforementioned photographing body portion may be rotated relative to the sheet to adjust the aforementioned relative photographing angle. The inspection apparatus of the sheet according to claim 2, wherein the position adjustment unit is configured to move the imaging main body portion in a first direction and a second direction perpendicular to the first direction with respect to the sheet, and the angle adjustment The portion is configured to rotate the imaging main body portion about the first rotation axis and the second rotation axis perpendicular to the first rotation axis with respect to the sheet. The apparatus for inspecting a sheet according to claim 3, wherein the position adjustment unit includes: a first position adjustment unit that allows the imaging main unit to move in a direction approaching and away from the sheet; and a second position adjustment unit The imaging main body portion is movable in a direction perpendicular to a moving direction formed by the first position adjusting portion, and the angle adjusting portion includes a first angle adjusting portion that causes the imaging main body portion to be opposite to the sheet The first rotation axis rotates about the center; and the second angle adjustment unit rotates the imaging main body portion around the second rotation axis. The inspection apparatus for a sheet according to any one of claims 1 to 4, further comprising a control unit that is electrically connected to the imaging unit and obtains an inspection result from the imaging unit, wherein the control unit is configured to be Move in response to the movement of the aforementioned gantry. A method of inspecting a sheet by inspecting the sheet using an inspection apparatus for a sheet according to any one of claims 1 to 5.