JP2017090117A - Inspection device and inspection method of sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inspection device and an inspection method of a sheet, which can sufficiently identify a position and a cause of occurence of a defect in the sheet.SOLUTION: An inspection device of a sheet, which inspects a belt-like sheet moving along a moving route, includes: a movable pedestal; and an inspection part which is supported by the pedestal and which inspects the sheet. The inspection part includes: a light source for irradiating the sheet with light; and an imaging part which can adjust an imaging position and an imaging angle relative to the sheet in such a state that the pedestal is provided at an arbitrary position on the moving route, and which images the sheet irradiated with the light by the light source.SELECTED DRAWING: Figure 2

Description

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

  Conventionally, for example, in a polarizing plate, a protective film (original fabric sheet) is laminated on both sides of a strip-shaped polarizer (original fabric sheet), and a retardation film (original fabric sheet) is laminated on one protective film via an adhesive. Further, a separator (raw sheet) is laminated on the retardation film via an adhesive, and a surface treatment agent layer is laminated on the other protective film. Such a polarizing plate is in the state of a laminate (laminated sheet) in which a release liner (raw fabric sheet) is laminated on a surface treatment agent layer, and is distributed through inspections such as foreign matter inspection.

  As an inspection apparatus used for inspecting this type of sheet, for example, an inspection unit including a light source unit that irradiates light to a laminated sheet and an imaging unit that images the laminated sheet irradiated with the light is moved. 2. Description of the Related Art There has been proposed an inspection apparatus configured to irradiate a laminated sheet that is irradiated with light by a light source unit, and to image the laminated sheet irradiated with the light with an imaging unit (see Patent Documents 1 and 2). In addition, such an inspection apparatus is installed at the subsequent stage of the stacking unit that stacks the original fabric sheets so that the position and focus of the imaging unit with respect to the stacked sheet are adjusted, and the positional relationship between the stacked sheet and the imaging unit does not change. The laminated sheet is inspected in a state of being fixedly arranged on the sheet (see Patent Documents 1 and 2).

JP 2005-62165 A Japanese Patent Application Laid-Open No. 06-242023

  By the way, the inspection of the laminated sheet as described above is performed so as not to distribute a defective product in which a defect such as mixing of foreign matters into the laminated sheet is distributed to the market. Will fall. Therefore, when a product defect is discovered, it is desirable to determine the cause of the occurrence and to take measures to suppress 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 that inspect before shipment at the completion stage, it is difficult to sufficiently determine the cause of the occurrence of a defect such as a foreign object.
This is not only a problem of the laminated sheet alone, but also a problem of the non-laminated sheets.

  In view of the above circumstances, an object of the present invention is to provide a sheet inspection apparatus and inspection method capable of sufficiently specifying the occurrence position and cause of sheet failure.

The sheet inspection apparatus according to the present invention includes:
A sheet inspection apparatus for inspecting a belt-shaped sheet moving along a movement path,
A movable mount;
An inspection unit supported by the gantry and inspecting the sheet;
The inspection unit
A light source unit for irradiating the sheet with light;
The sheet is configured so that the relative imaging position and imaging angle relative to the sheet can be adjusted in a state in which the gantry is arranged at an arbitrary position in the movement path, and the light source unit irradiates light. And an imaging unit.

According to such a configuration, the inspection apparatus can be moved to an arbitrary position in the sheet movement path by moving the gantry together with the inspection unit. And the imaging position and imaging angle of the imaging part with respect to a sheet | seat can be adjusted in the position which moved the mount frame in this way. Accordingly, it is possible to inspect the sheet by appropriately adjusting the imaging target region and the focus of the imaging unit.
Therefore, it is possible to sufficiently specify the occurrence position and cause of the sheet defect, such as what kind of defect has occurred at which position.

In the sheet inspection apparatus configured as described above,
The imaging unit
An imaging body,
A position adjusting unit capable of adjusting the relative imaging position by moving the imaging main body with respect to the sheet;
It is preferable to have an angle adjustment unit capable of adjusting the relative imaging angle by rotating the imaging main body with respect to the sheet.

According to this configuration, the position adjustment unit moves the imaging body relative to the sheet to adjust the relative imaging position, and the angle adjustment unit rotates the imaging body relative to the sheet to move the relative position. The general imaging angle can be adjusted.
As a result, the imaging position adjustment and the imaging angle adjustment of the imaging main body with respect to the sheet can be performed independently, or the imaging position adjustment and the imaging angle adjustment can be performed in combination. The position and imaging angle can be adjusted in more detail.
Therefore, it is possible to adjust the imaging position and imaging angle of the imaging main body to a desired imaging position and imaging angle without being affected by the arrangement state of the gantry. The cause can be identified more fully.

In the sheet inspection apparatus configured as described above,
A control unit that is electrically connected to the imaging unit and obtains a test result from the imaging unit;
It is preferable that the control unit is configured to be movable according to the movement of the gantry.

According to such a configuration, since the control unit can acquire the inspection result from the imaging unit by moving the control unit in accordance with the movement of the gantry (that is, the movement of the imaging unit), the imaging unit and the control unit are connected accordingly. Wiring for electrical connection can be shortened. Moreover, since the freedom degree of arrangement | positioning of an imaging part and a control part increases, it becomes easy to move both, and, thereby, a sheet | seat can be test | inspected more simply. In addition, test results at a plurality of positions can be acquired more easily.
In addition, when an aspect in which inspection results are acquired at a plurality of positions is employed, it is possible to compare a plurality of acquired inspection results and specify a position where foreign matter is more likely to occur. The position to be inspected can be more appropriately specified.
Thus, the inspection device becomes more useful.

The sheet inspection method according to the present invention includes:
Using the sheet inspection device,
Inspect the sheet.

  As described above, according to the present invention, a sheet inspection apparatus and inspection method capable of sufficiently specifying the occurrence position and cause of sheet failure are provided.

Schematic side view showing a sheet conveying apparatus provided with a sheet inspection apparatus according to an embodiment of the present invention Schematic front view showing the periphery of the inspection apparatus from direction A in FIG. FIG. 2 is a schematic top view showing the periphery of the inspection apparatus from the direction B in FIG. Schematic side view showing the periphery of the inspection apparatus from the direction C in FIG. Schematic top view showing a state in which each part is arranged in the inspection apparatus of FIG. Schematic top view showing the periphery of the inspection apparatus from the direction D in FIG. Schematic top view showing a state where each part is arranged in the inspection apparatus of FIG. Schematic side view showing the imaging position adjustment operation of the first and second position adjustment units Schematic side view showing the imaging angle adjustment operation of the first and second angle adjustment units Schematic side view showing a state in which the imaging position of the imaging main body relative to the sheet is adjusted by the first position adjustment unit Schematic side view showing a state in which the imaging position of the imaging main body relative to the sheet is adjusted by the second position adjustment unit The schematic side view which shows the state in which the imaging angle of the imaging main-body part with respect to a sheet | seat is adjusted by the 1st angle adjustment part Schematic side view showing a state in which the imaging angle of the imaging main body relative to the sheet is adjusted by the second angle adjustment unit Schematic side view showing a sheet of an example to which the inspection apparatus of the present embodiment is applied Schematic side view showing another sheet conveying apparatus provided with the inspection apparatus of the present embodiment

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

  First, a sheet conveying apparatus including the sheet inspection apparatus according to the present embodiment will be described.

The sheet conveying apparatus 1 of the present embodiment includes a plurality of feeding units 3 that respectively feed out the original fabric sheet 60 from a roll body 61 in which the original fabric sheet 60 as a belt-like sheet 40 is wound, and the fed original material. The stacking unit 7 that stacks the anti-sheets 60 to form the stacking sheet 50 as the sheet 40, the winding unit 9 that winds up the stacking sheet 50 and collects it as the roll body 51, and is movable. And an inspection device 20 capable of inspecting the above.
In the present embodiment, two inspection apparatuses 20 are provided so as to form a pair along the width direction of the sheet 40, and the pair of inspection apparatuses 20 inspect the sheet 40.

In the conveying device 1, the raw sheet 60 fed out from the feeding unit 3 is laminated by the laminating unit 7 to form a laminated sheet 50, and the formed laminated sheet 50 is wound up by the winding unit 9. It has become.
Further, when the sheet 40 is moved, the sheet 40 is inspected by the inspection apparatus 20.

  As shown in FIGS. 2 and 3, the inspection apparatus 20 is an inspection apparatus 20 for a sheet 40 that inspects a belt-like sheet 40 that moves along a movement path. The inspection apparatus 20 includes a movable base 21 and a movable base 21. An inspection unit 22 that is supported and inspects the sheet 40. The inspection unit 22 includes a light source unit 23 that irradiates the sheet 40 with light, and the mount 21 is disposed at an arbitrary position in the movement path of the sheet 40. And an imaging unit 25 configured to adjust the relative imaging position and imaging angle relative to the sheet 40 in a state where the sheet 40 is adjusted, and to image the sheet 40 irradiated with light from the light source unit 23. Yes.

  The inspection device 20 for the sheet 40 further includes a control unit 37 that is electrically connected to the imaging unit 25 and acquires the inspection result from the imaging unit 25, and the control unit 37 moves the gantry 21. It is configured to be movable according to the situation.

The gantry 21 is configured to be movable so as to move the inspection location, and is moved to an arbitrary position in the movement path of the sheet 40. The inspection apparatus 20 is moved by moving the gantry 21 together with the inspection unit 22.
The gantry 21 is attached to the frame 5 of the conveying device 1 in the movement path of the sheet 40. For example, the gantry 21 is attached to the frame 5 with bolts or the like.
FIG. 1 illustrates a state in which the gantry 21 is attached to the frame 5 in the vicinity of one of the two feeding portions 3.

The gantry 21 is formed in a size that can be carried by an operator.
As described above, since the gantry 21 is formed to be portable, the gantry 21 can be easily moved.

  As shown in FIGS. 2 and 3, the gantry 21 includes an L-shaped main body portion 21 a that forms the main body, and a reinforcing portion 21 b that reinforces the main body portion 21 a. One end side of the L-shape of the main body 21 a is fixed to the side surface of the frame 5 with a bolt or the like, and the other end side protrudes inward from the side surface side of the frame 5. A light source unit 23 is fixed to one end side of the L-shape. An imaging unit 25 is fixed to the other end of the L shape. The reinforcing portion 21b is arranged on the side surface portion of the main body portion 21a so as to reinforce the main body portion 21a.

  The inspection unit 22 can adjust a relative imaging position and imaging angle with respect to the sheet 40 in a state where the light source unit 23 that irradiates light to the sheet 40 and the gantry 21 are arranged at arbitrary positions in the movement path of the sheet 40. And an imaging unit 25 configured to image the sheet 40 irradiated with light from the light source unit 23.

  The light source unit 23 irradiates the sheet 40 with light. The light source unit 23 includes a light source main body 23 a and a connection part 23 b connected to the gantry 21, and the connection part 23 b is connected to the one end side of the gantry 21. The light source unit 23 irradiates the sheet 40 with light from one surface (here, the lower surface) side of the sheet 40.

The imaging unit 25 is configured to be able to adjust a relative imaging position and imaging angle with respect to the sheet 40, and images the sheet 40 irradiated with light from the light source unit 23.
The imaging angle is an angle formed by the imaging surface of the sheet 40 and the imaging direction of the imaging unit 25.
In the present embodiment, the imaging unit 25 images the sheet 40 irradiated with light from one surface (here, the lower surface) side from the other surface (here, the upper surface) side.

The imaging unit 25 is configured to be able to adjust the imaging position and imaging angle relative to the sheet 40.
Specifically, as illustrated in FIGS. 4 to 7, the imaging unit 25 can adjust the relative imaging position by moving the imaging body 27 with respect to the imaging body 27 and the sheet 40. A position adjusting unit 31 and an angle adjusting unit 33 capable of adjusting the relative imaging angle by rotating the imaging main body 27 with respect to the sheet 40.

The imaging main body 27 is a main body that images the sheet 40.
As the imaging main body 27, a conventionally known camera or the like can be adopted.

  The position adjustment unit 31 can adjust the relative imaging position by moving the imaging main body 27 with respect to the sheet 40. Specifically, the position adjustment unit 31 is configured to be able to move the imaging main body 27 in one direction and a direction perpendicular to the one direction.

  More specifically, the position adjustment unit 31 includes a first position adjustment unit 31a capable of moving the imaging main body 27 in a direction approaching and separating from the sheet 40 (here, a vertical direction), A second position adjusting unit 31b capable of moving the imaging main body 27 in a direction perpendicular to the moving direction by the first position adjusting unit 31a (here, the horizontal direction, that is, the width direction of the sheet 40). ing.

As shown in FIG. 8, the first position adjustment unit 31a adjusts the relative movement amounts of the two stage units 31aa and 31ab that can move relative to each other and the two stage units 31aa and 31ab. And a movement amount adjusting unit 31ac. As the movement amount adjustment unit 31ac, a knob unit that can adjust the movement amount by rotating is adopted.
As such a first position adjusting unit 31a, a unit in which two stage units 31aa and 31ab are connected by a rack and pinion mechanism so that one moves linearly with respect to the other can be used. As this 1st position adjustment part 31a, the coarse / fine movement rack and pinion stage (for example, product number TAR-38801D etc.) made from Sigma Koki Co., Ltd. is mentioned.
The first position adjusting unit 31a is arranged so that the two stage units 31aa and 31ab can move relative to each other in a direction approaching and separating from the sheet 40 (here, a vertical direction). .

The second position adjustment unit 31b includes two stage units 31ba and 31bb that can move relative to each other, and a movement amount adjustment unit 31bc for adjusting the relative movement amounts of the two stage units 31ba and 31bb. And have. As the movement amount adjustment unit 31bc, a knob unit that can adjust the movement amount by rotating is adopted.
As such a second position adjusting unit 31b, a unit in which two stage units 31ba and 31bb are coupled by a rack and pinion mechanism so that one moves linearly with respect to the other can be used. As the second position adjusting unit 31b, a coarse / fine movement rack and pinion stage (for example, a product number TAR-38801D) manufactured by Sigma Koki Co., Ltd. can be used as described above.
In the second position adjusting unit 31b, the two stage units 31ba and 31bb are relatively relative to each other in a direction perpendicular to the moving direction of the first position adjusting unit 31a (here, the horizontal direction, that is, the width direction of the sheet 40). It is arranged to be movable.

  In the present embodiment, as the first and second position adjusting units 31a and 31b, two position adjusting units having the same configuration are arranged so that their moving directions are inclined by 90 °. To do.

  As shown in FIGS. 5 and 7, one stage 31ab of the first position adjusting unit 31a is coupled to one stage 31ba of the second position adjusting unit 31b by a connection unit (not shown). . The other stage portion 31aa of the first position adjustment portion 31a is attached to the gantry 21 by a connection portion (not shown).

  The angle adjustment unit 33 can adjust the relative imaging angle by rotating the imaging main body 27 with respect to the sheet 40. Note that the change in the imaging angle corresponds to a change in the posture of the imaging main body 27. Specifically, the angle adjusting unit 33 is configured to rotate the imaging main body 27 about one arbitrary rotation axis R1 and a rotation axis R2 perpendicular to the rotation axis R1 (FIGS. 4 and 4). 6).

  More specifically, the angle adjustment unit 33 is a rotation axis R1 (here, a rotation axis parallel to the bottom surface 33ad of the first angle adjustment unit 33a and parallel to the width direction of the sheet 40, that is, the width of the sheet 40). A rotation angle R2 perpendicular to the rotation axis R1 of the first angle adjustment unit 33a and a first angle adjustment unit 33a that rotates the imaging main body 27 with respect to the sheet 40. The imaging main body 27 is placed on the sheet 40 with the center (here, the rotation axis parallel to the bottom surface 33bd of the second angle adjustment unit 33b and perpendicular to the rotation axis R1 of the first angle adjustment unit 33a). And a second angle adjusting unit 33b to be rotated.

As shown in FIGS. 5, 7, and 9, the first angle adjusting unit 33 a includes two stage units 33 aa and 33 ab that are rotatable relative to each other and a relative rotation of the two stage units 33 aa and 33 ab. And a rotation amount adjustment unit 33ac for adjusting the amount. As the rotation amount adjustment unit 33ac, a knob unit that can adjust the rotation amount by rotating is adopted.
As such a first angle adjusting unit 33a, a gonio stage formed by connecting two stage units 33aa and 33ab so that one moves in an arc with respect to the other may be used. As this 1st angle adjustment part 33a, the alpha-axis gonio stage (for example, product number GOH-60A115, GOH-60A50 etc.) by Sigma Koki Co., Ltd. is mentioned.
In the first angle adjusting unit 33a, the two stage units 33aa and 33ab are parallel to the bottom surface 33ad of the stage unit 33aa (that is, the bottom surface of the first angle adjusting unit 33a) and parallel to the width direction of the sheet 40. The rotation axes R1 (that is, rotation axes parallel to the width direction of the sheet 40) are arranged so as to be rotatable relative to each other.

The second angle adjustment unit 33b includes two stage units 33ba and 33bb that can rotate relative to each other, and a rotation amount adjustment unit 33bc for adjusting the relative rotation amount of the two stage units 33ba and 33bb. And have. As the rotation amount adjustment unit 33bc, a knob unit that can adjust the rotation amount by rotating is adopted.
As such a second angle adjusting unit 33b, a gonio stage in which two stage units 33ba and 33bb are connected so that one moves in an arc with respect to the other may be used. As this 2nd angle adjustment part 33b, the alpha axis goniometer stage (For example, product number GOH-60A115, GOH-60A50 etc.) made from Sigma Koki Co., Ltd. is mentioned like the above.
In the second position adjustment unit 33b, the two stage units 33ba and 33bb are parallel to the bottom surface 33bd of the stage unit 33ba (that is, the bottom surface of the second angle adjustment unit 33b), and the first angle adjustment unit 33a. Are arranged so as to be rotatable relative to each other about a rotation axis R2 perpendicular to the rotation axis R1.

  In the present embodiment, as the first and second angle adjusting units 33a and 33b, two angle adjusting units having the same configuration are arranged so that their rotation axes are inclined by 90 °. Has been.

  As shown in FIGS. 5 and 7, one stage portion 33ab of the first angle adjusting portion 33a is coupled to one stage portion 33ba of the second angle adjusting portion 33b by a connecting portion (not shown). . Further, the other stage portion 33aa of the first angle adjustment portion 33a is connected to a stage portion 31bb on the side opposite to the first position adjustment portion 31a in the second position adjustment portion 31b by a connection portion (not shown). ing.

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

  As shown in FIG. 10, when the movement amount adjustment unit 31ac of the first position adjustment unit 31a is rotated to operate the first position adjustment unit 31a, the other of the stage unit 31aa attached to the gantry 21 The stage portion 31ab 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 main body 27 move in the vertical direction as described above. Thereby, the imaging position of the imaging main body 27 with respect to the sheet 40 in the direction perpendicular to the sheet 40 (that is, the shortest distance connecting the sheet 40 and the center of the imaging main body 27) can be adjusted.

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

  As shown in FIG. 12, when the rotation amount adjustment unit 33ac of the first angle adjustment unit 33a is rotated to operate the first angle adjustment unit 33a, the first angle adjustment unit 33a is connected to the stage unit 31bb of the second position adjustment unit 31b. The other stage portion 33ab rotates around the rotation axis R1 parallel to the width direction of the sheet 40 as described above with respect to the stage portion 33aa of the first angle adjusting portion 33a. With this rotation, the second angle adjustment unit 33b and the imaging main body 27 rotate around the rotation axis R1 parallel to the width direction of the sheet 40 as described above. Thereby, among the imaging angles of the imaging main body 27 with respect to the sheet 40, the imaging angle component θ1 in a virtual plane perpendicular to the sheet 40 and perpendicular to the width direction of the sheet 40 (parallel to the longitudinal direction) can be adjusted.

  As shown in FIG. 13, when the rotation amount adjustment unit 33bc of the second angle adjustment unit 33b is rotated to operate the second angle adjustment unit 33b, the second angle adjustment unit 33b is connected to the stage unit 33ab of the first angle adjustment unit 33a. As described above, the other stage portion 33bb is parallel to the bottom surface 33bd of the stage portion 33ba and the rotation axis R1 of the first angle adjustment portion 33a with respect to the stage portion 33ba of the second angle adjustment portion 33b. Rotates about a rotation axis R2 perpendicular to the axis. With this rotation, the imaging main body 27 rotates about the rotation axis R2 that is parallel to the bottom surface 33bd of the stage 33ba and perpendicular to the rotation axis R1 of the first angle adjustment unit 33a as described above. Thereby, the imaging angle component θ2 in the virtual plane parallel to the sheet 40 among the imaging angles of the imaging main body 27 with respect to the sheet 40 can be adjusted.

  By combining the moving operation of the imaging main body 27 by the first position adjusting unit 31a and the moving operation of the imaging main body 27 by the second position adjusting unit 31b, the imaging position of the imaging main body 27 with respect to the sheet 40 is determined. It can be adjusted freely.

  By combining the rotation operation of the imaging main body 27 by the first angle adjustment unit 33a and the rotation operation of the imaging main body 27 by the second angle adjustment unit 33b, the imaging angle of the imaging main body 27 with respect to the sheet 40 is set. It can be adjusted freely.

The control unit 37 is electrically connected to the imaging unit 25, and the inspection result in the imaging unit 25 is transmitted as electronic data, and the transmitted inspection result is acquired.
Moreover, the control part 37 is comprised so that a movement is possible, and the control part 37 is moved by the movement of the mount frame 21 by this.
Examples of the control unit 37 include a computer having a central processing unit (CPU).

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

First, the inspection device 20 is moved to the frame 5 of the transport device 1 to attach the gantry 21.
For example, as shown in FIG. 1, the frame 21 of the inspection apparatus 20 is attached to the frame 5 in the vicinity of the feeding portion 3 of the original fabric sheet 60 (sheet 40).

  After the gantry 21 is attached (that is, in a state where the gantry 21 is arranged at an arbitrary position in the movement path of the sheet 40), the image adjustment unit 25 and the angle adjustment unit 33 perform imaging of the imaging unit 25 with respect to the original fabric sheet 60. Adjust the position and imaging angle.

  Specifically, as described above, the imaging position adjustment (see FIG. 10) of the imaging main body 27 in the direction approaching and separating from the original fabric sheet 60 by the first position adjustment unit 31a, The position adjustment unit 31b adjusts the imaging position of the imaging main body 27 in the width direction of the original sheet 60 (see FIG. 11) and the first angle adjustment unit 33a is perpendicular to the original sheet 60 and the original sheet. Adjustment of the imaging angle component θ1 of the imaging main body 27 with respect to the original sheet 60 on a virtual plane perpendicular to the width direction of the 60 (see FIG. 12) and parallel to the original sheet 60 by the second angle adjustment unit 33b. By combining the adjustment of the imaging angle component θ2 of the imaging main body 27 with respect to the original fabric sheet 60 on a virtual plane (see FIG. 13), the imaging position and imaging of the imaging main body 27 with respect to the original fabric sheet 60 are performed. By adjusting the image angle, the imaging target area and focus of the imaging main body 27 are made appropriate.

  In this state, the raw sheet 60 is fed out from the roll body 61 by the feed-out unit 3, and the light source unit 23 emits light to the original fabric sheet 60 that is moved by the feeding-out, and the raw sheet 60 is irradiated with light. Are imaged by the imaging main body 27 of the imaging unit 25 and inspected.

  The obtained inspection result is transmitted from the imaging unit 27 to the control unit 37 as electronic data.

  In this way, the inspection apparatus 20 is moved to the claim 5 in the vicinity of the feeding unit 3 to inspect the original sheet 60.

  Further, while inspecting the original fabric sheet 60 in this way, the inspected original fabric sheet 60 and the original fabric sheet 60 fed out from the other feeding section 3 are laminated in the laminating section 7 to obtain a laminated sheet 50 ( Sheet 40) is formed, and the formed laminated sheet 50 is taken up by the take-up unit 9 and collected as the roll body 51.

  Furthermore, when the sheet 40 is to be inspected at another position in the movement path of the sheet 40, the inspection device 20 is removed from the frame 5 near the winding unit 3 and, for example, a frame near the stacking unit 7 (non- The inspection apparatus 20 is moved to the figure, the inspection apparatus 20 is attached to the frame in the same manner as described above, and the laminated sheet 50 is inspected.

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

  That is, the inspection apparatus 20 for the sheet 40 according to the present embodiment is an inspection apparatus for the sheet 40 that inspects the belt-shaped sheet 40 that moves along the movement path, and is supported by the movable base 21 and the base 21. An inspection unit 22 that inspects the sheet 40, and the inspection unit 22 applies the light source unit 23 that irradiates light to the sheet 40, and the base 21 with respect to the sheet 40 in a state where the mount 21 is arranged at an arbitrary position in the movement path of the sheet 40. The image capturing unit 25 is configured to be able to adjust the relative image capturing position and image capturing angle, and captures the sheet 40 irradiated with light from the light source unit 23.

According to this configuration, the inspection apparatus 20 can be moved to an arbitrary position in the movement path of the sheet 40 by moving the gantry 21 together with the inspection unit 22. And the imaging position and imaging angle of the imaging part 25 with respect to the sheet | seat 40 can be adjusted in the position moved in this way. Accordingly, it is possible to inspect the sheet 40 by appropriately adjusting the imaging target region and the focus of the imaging unit 25.
Therefore, it is possible to sufficiently specify the occurrence position and cause of the sheet defect, such as what kind of defect has occurred at which position.

  In the inspection apparatus 20 for the sheet 40 of this embodiment, the imaging unit 25 can adjust the relative imaging position by moving the imaging main body 27 and the imaging main body 27 with respect to the sheet 40. The position adjustment unit 31 and the angle adjustment unit 33 capable of adjusting the relative imaging angle by rotating the imaging main body unit 27 with respect to the sheet 40 are provided.

According to such a configuration, the position adjustment unit 31 moves the imaging main body 27 with respect to the sheet 40 to adjust the relative imaging position, and the angle adjustment unit 33 adjusts the imaging main body 27 with respect to the sheet 40. Can be rotated to adjust the relative imaging angle.
Accordingly, the imaging position adjustment and the imaging angle adjustment of the imaging main body 27 with respect to the sheet 40 can be performed independently, or the imaging position adjustment and the imaging angle adjustment can be performed in combination. The imaging position and imaging angle of the unit 27 can be adjusted in more detail.
Therefore, the imaging position and imaging angle of the imaging main body 27 can be adjusted to a desired imaging position and imaging angle without being affected by the arrangement state of the gantry 21, thereby causing the occurrence position of the sheet defect. And the cause of occurrence can be identified more fully.

  In the inspection apparatus 20 for the sheet 40 according to 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 such a configuration, it is possible to suppress a foreign matter or the like from falling on the imaging unit 25, and thus it is possible to suppress a decrease in inspection accuracy caused by the adhesion of the foreign matter to the imaging unit 25.

  In the inspection apparatus 20 for the seat 40 according to the present embodiment, the control unit 37 is further provided with a control unit 37 that is electrically connected to the imaging unit 25 and obtains the inspection result from the imaging unit 25, and the control unit 37 moves the gantry 21. It is configured to be movable according to the situation.

According to this configuration, the control unit 37 can be moved in accordance with the movement of the gantry 21 (that is, the movement of the imaging unit 25), and the control unit 37 can acquire the inspection result from the imaging unit 25. Wiring for electrically connecting the unit 25 and the control unit 37 can be shortened. Moreover, since the freedom degree of arrangement | positioning of the imaging part 25 and the control part 37 increases, it becomes easy to move both, Thereby, the sheet | seat 40 can be test | inspected more simply. In addition, test results at a plurality of positions can be acquired more easily.
In addition, when an aspect in which inspection results are acquired at a plurality of positions is adopted, it is possible to compare a plurality of acquired inspection results and specify a position where foreign matter is more likely to be generated. The position to be inspected in the path can be specified more appropriately.
Thus, the inspection apparatus 20 becomes more useful.

The sheet 40 inspection method of this embodiment uses the sheet 40 inspection apparatus 20 to inspect the sheet 40.
According to such a configuration, by inspecting the sheet 40 using the inspection apparatus 20 for the sheet 40, the occurrence position and the cause of occurrence of the sheet defect can be sufficiently specified as described above.

The sheet 40 inspection method of the present embodiment uses the sheet 40 inspection apparatus 20 to move the inspection apparatus 20 to a predetermined position in the movement path and inspect the sheet 40.
According to such a configuration, by performing inspection using the inspection apparatus 20, it is possible to sufficiently specify the position and cause of occurrence of a sheet defect.

The conveyance apparatus 1 provided with the inspection apparatus 20 for the sheet 40 according to the present embodiment can convey the sheet 40 while inspecting the sheet 40 by the inspection apparatus 20.
In this way, by transporting the sheet 40 while inspecting using the inspection apparatus 20, it is possible to transport the sheet 40 while sufficiently identifying the occurrence position and cause of the sheet failure.

The sheet 40 conveyance method using the sheet 40 inspection apparatus 20 according to the present embodiment can convey the sheet 40 while inspecting the sheet 40.
In this way, by transporting the sheet 40 while inspecting using the inspection apparatus 20, it is possible to transport the sheet 40 while sufficiently identifying the occurrence position and cause of the sheet failure.

  As described above, according to the present embodiment, the inspection apparatus 20 and the inspection method for the sheet 40 that can sufficiently specify the occurrence position and the generation cause of the sheet defect are provided.

  The inspection apparatus 1 and the inspection method for the sheet 40 of the present embodiment have the above-described configuration and have the advantages as described above. However, the present invention is not limited to the above-described embodiment, and is within the intended scope of the present invention. The design can be changed as appropriate.

For example, a laminated sheet (polarizing plate) 50 as shown in FIG. 14 may be employed as the sheet 40 inspected by the inspection apparatus 20. In the laminated sheet 50 shown in FIG. 14, each sheet is fed out by a feeding unit from each roller body of a separator 60 a, a retardation film 60 b, a protective film 60 c, a polarizer 60 d, a protective film 60 e, and a release liner 60 f as original sheets. The laminated sheet 50 is formed by being laminated at the laminated part while being supplied to the laminated part. Further, the formed laminated sheet 50 is wound up and collected. .
A mode of inspecting one of the original films 60a to 60f and the laminated sheet 50 by moving the inspection apparatus 20 to an arbitrary position in the moving path may be adopted. .

  Further, for example, as shown in FIG. 15, the original fabric sheet 60 is fed out by a feeding unit 3 from a roll body 61 in which an original fabric sheet 60 as a sheet 40 is wound. After being dried by the first drying unit 71 and subjected to the corona treatment by the corona treatment unit 73, the coating liquid is applied to the raw sheet 60 by the coating unit 75, and dried by the second drying unit 77. After the sheet 63 (sheet 40) formed with the coating film is formed on the anti-sheet 60, the sheet 63 moves while being stretched around the tension roller 79, and is wound up by the winding unit 9 to be rolled. A mode in which the inspection device 20 is provided in the transport device 1 configured to collect the number 65 can also be employed. In this case, each sheet can be inspected by moving the inspection apparatus 20 to an arbitrary position in the movement path of the sheet 63 on which the raw sheet 60 and the coating film are formed.

  DESCRIPTION OF SYMBOLS 1: Conveyance apparatus, 3: Feeding part, 7: Lamination | stacking part, 9: Winding part, 20: Inspection apparatus, 21: Mounting stand, 22: Inspection part, 23: Light source part, 25: Imaging part, 27: Imaging main-body part 31: Position adjustment unit, 33: Angle adjustment unit, 37: Control unit, 40: Sheet, 50: Laminated sheet, 60: Original fabric sheet

Claims (4)

A sheet inspection apparatus for inspecting a belt-shaped sheet moving along a movement path,
A movable mount;
An inspection unit supported by the gantry and inspecting the sheet;
The inspection unit
A light source unit for irradiating the sheet with light;
The sheet is configured so that the relative imaging position and imaging angle relative to the sheet can be adjusted in a state in which the gantry is arranged at an arbitrary position in the movement path, and the light source unit irradiates light. A sheet inspection apparatus having an imaging unit. The imaging unit
An imaging body,
A position adjusting unit capable of adjusting the relative imaging position by moving the imaging main body with respect to the sheet;
The sheet inspection apparatus according to claim 1, further comprising: an angle adjusting unit capable of adjusting the relative imaging angle by rotating the imaging main body with respect to the sheet. A control unit that is electrically connected to the imaging unit and obtains a test result from the imaging unit;
The sheet inspection apparatus according to claim 1, wherein the control unit is configured to be movable in accordance with the movement of the gantry. Using the sheet inspection apparatus according to claim 1,
A sheet inspection method for inspecting the sheet.

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