JP6768189B2 - Manufacturing method of glass plate - Google Patents

Description

The present invention relates to a method for manufacturing a glass plate, which includes a step of positioning the glass plate when cutting the glass plate or the like.

As is well known, there is a rectangular glass plate as a glass plate having a typical shape. As an example of the method for manufacturing this rectangular glass plate, there is a method of cutting out a rectangular glass plate from the mother glass plate by cutting the mother glass plate which is the basis of the method. When adopting such a method, for example, the following first to third steps are executed.

First, as the first step, the mother glass plate is cut twice in parallel by a cutting device that cuts the mother glass plate along a cutting trajectory extending in a straight line, among the four sides of the rectangular glass plate. First, cut out only two parallel sides. Next, as a second step, one of the two cut-out side portions is used as a reference side portion as a reference for positioning, and after the orientation of the mother glass plate is changed by approximately 90 ° in a plan view, the reference side portion is formed. The mother glass plate is positioned so as to extend along a positioning line orthogonal to the cutting trajectory of the cutting device. Finally, as a third step, the positioned mother glass plate is cut twice in parallel by a cutting device to cut out the remaining two sides of the rectangular glass plate. By the above steps, a rectangular glass plate is cut out from the mother glass plate.

Here, the positioning performed in the second step can be performed by using, for example, the method disclosed in Patent Document 1. In the method disclosed in the same document, a reference side portion (edge in the same document) extending in the vertical direction of a glass plate placed on a processing table is brought into contact with two positioning pins, and a reference side portion extending in the horizontal direction is brought into contact with the two positioning pins. This is a method of positioning a glass plate by bringing the glass plate into contact with one positioning pin. When the same method is used for positioning performed in the second step, positioning can be performed using only one side portion in contact with the two positioning pins as a reference side portion. In this case, the straight line passing through the two positioning pins becomes the positioning line that the reference side portion should follow.

Japanese Unexamined Patent Publication No. 2013-91126

However, when the glass plate is positioned by using the above method, the following problems to be solved occur.

That is, in recent years, thinning of glass plates has been rapidly promoted, and glass plates (glass films) thinned to film form have been developed and manufactured. Since such a glass plate is extremely thin, it easily bends even when a slight external force acts on it. Therefore, when the above method is used, the inclination of the reference side portion with respect to the positioning line increases the allowable range due to the bending deformation of the reference side portion of the glass plate due to the contact with the positioning pin. There was a problem of deviation.

When such a situation occurs, the glass plate is not substantially positioned, and the two sides cut out in the first step and the two sides cut out in the third step are separated from each other. , It is not formed so as to be at a right angle, and as a result, there arises a problem that it becomes impossible to obtain a rectangular glass plate itself. Under these circumstances, it has been expected to develop a technique capable of positioning the glass plate regardless of the thickness of the glass plate, including the case where the thickness of the glass plate is extremely thin.

The present invention made in view of the above circumstances makes it a technical subject to enable positioning of the glass plate regardless of the thickness of the glass plate.

The present invention, which was devised to solve the above problems, manufactures a glass plate including a positioning step of positioning the glass plate so that the reference side portion of the glass plate as a reference for positioning extends along the positioning line. The first method is to use a first imaging means for capturing the first section on the positioning line and a second imaging means for capturing a second section different from the first section on the positioning line. The positioning step is executed by adjusting so that a part of the reference side portion is projected on both the first image captured by the imaging means and the second image captured by the second imaging means. Characterized by.

In this method, both the first imaging means and the second imaging means capture the mutually different sections on the positioning line in the field of view. From this, if a part of the reference side portion is projected on both the first image and the second image captured by both imaging means, the reference side portion inevitably extends along the positioning line. It means that the glass plate is in the positioned state. From the above, if adjustments are made so that a part of the reference side portion is projected on both images, the positioning of the glass plate is completed. Then, in this method, when positioning the glass plate, it is not necessary to bring the reference side portion of the glass plate into contact with an external object such as a positioning pin. Therefore, even when the thickness of the glass plate is extremely thin, a situation in which the reference side portion is bent and deformed due to contact with an external object cannot inevitably occur. Therefore, according to this method, the positioning of the glass plate can be performed regardless of the thickness of the glass plate.

In the above method, it is preferable to display the positioning target line corresponding to the positioning line on each of the first image and the second image.

By doing so, since the positioning target line corresponding to the positioning line is displayed in each of the two images, a part of the reference side portion projected on both images is aimed at the positioning target line. However, the positioning accuracy can be improved by adjusting so as to follow the positioning target line.

In the above method, it is preferable to display marks indicating an allowable range of inclination of the reference side with respect to the positioning line on both sides of each of the first image and the second image with the positioning target line as a boundary.

If the width of the field of view along the direction orthogonal to the positioning line is too wide for each field of view of both image pickup means, even if a part of the reference side portion is projected on both images, the reference side is projected. There is a possibility that the portion is tilted beyond the permissible range with respect to the positioning line. However, if the marks indicating the allowable range of the inclination of the reference side with respect to the positioning line are displayed on both sides of each of the two images with the positioning target line as the boundary, the above-mentioned fear can be surely eliminated. it can. This can be done by adjusting so that a part of the reference side section fits between the mark displayed on one side and the mark displayed on the other side with the positioning target line as the boundary. This is because it is possible to surely keep the inclination of the side portion within the allowable range. Further, by displaying both marks, the following effects can be obtained as a side effect. That is, the positioning work is completed only by fitting a part of the reference side portion between the two marks, so that the work can be performed efficiently.

In the above method, it is preferable that the mark is a positioning auxiliary line extending in parallel with the positioning target line.

By doing so, in each of the first image and the second image, the allowable range of the inclination of the reference side with respect to the positioning line is displayed as a pair of positioning auxiliary lines, so that the allowable range can be easily set on both images. Can be recognized. As a result, the positioning work can be performed more efficiently.

In the above method, it is preferable to display both images side by side so that the positioning target lines and the positioning auxiliary lines are located on the same straight line between the first image and the second image.

By doing so, since the first image and the second image are displayed side by side, it becomes easy to visually recognize both images at the same time. Moreover, since the positioning target lines and the positioning auxiliary lines are located on the same straight line between the two images, the positioning auxiliary line on one side and the positioning auxiliary line on the other side with the positioning target line as the boundary are used. It is extremely advantageous to make adjustments for accommodating a part of the reference side portion between the two images at the same time.

In the above method, a mounting table on which the glass plate is placed is installed, and assistance for assisting positioning is provided at each of the positions within the field of view of the first imaging means and the locations within the field of view of the second imaging means on the mounting table. It is preferable to provide a mark.

In this way, by providing auxiliary marks on the mounting table at locations within the fields of view of both imaging means, the reference side portion of the glass plate mounted on the mounting table and each of the two imaging means are provided. The relative positional relationship with the visual field can be easily grasped based on the auxiliary mark. As a result, the reference side portion can be quickly captured in the respective fields of view of both imaging means, and a part of the reference side portion can be quickly projected on both images. As a result, the positioning work can be performed more efficiently.

In the above method, the first imaging means and the second imaging means are arranged on the front surface side of the glass plate, and the reflectance to visible light is lower than that of the glass plate between the back surface of the glass plate and the mounting table. It is preferable to arrange the light source so that the light mirror-reflected on the surface of the glass plate enters the first imaging means and the second imaging means, respectively, with the rate member laid.

In this way, due to the difference in reflectance between the glass plate and the low reflectance member, the light emitted from the light source is reflected (specularly reflected) on the surface of the glass plate and then enters each of the two imaging means. Comparing the amount of light with the amount of light that enters each of the two imaging means after being reflected by the low reflectance member, the former is larger. Therefore, on both images, a part of the reference side portion is projected relatively brightly, and the low reflectance member is projected relatively darkly. This makes it easier to identify a part of the reference side portion on both images.

In the above method, the low reflectance member is preferably a foamed resin sheet.

In this way, since the foamed resin is a material that easily diffuses and reflects light, the amount of light that enters each of the two imaging means after being reflected by the surface of the glass plate and is reflected by the low reflectance member. After that, it becomes easy to make a significant difference in the amount of light entering each of the two imaging means. As a result, it becomes easier to identify a part of the reference side portion on both images. Further, by laying a foamed resin sheet between the back surface of the glass plate and the mounting table, it is possible to preferably prevent the back surface of the glass plate from being damaged due to sliding with the mounting table or the like. Become.

In the above method, it is preferable that the distance between the field of view of the first imaging means and the field of view of the second imaging means can be changed.

The more the partial section of the reference side portion projected on the first image and the partial section of the reference side portion projected on the second image are separated from each other, the more accurately the glass plate is positioned. In other words, the wider the distance between the field of view of the first imaging means and the field of view of the second imaging means, the more the positioning accuracy can be improved. From this, if it is possible to change the distance between the two visual fields when the size of the glass plate to be positioned changes and the length of the reference side is changed, a new one is available. According to the length of the reference side portion, the distance between the two visual fields can be widened to the distance at which the desired positioning accuracy can be obtained.

In the above method, when the cutting step of cutting the glass plate in the direction orthogonal to the reference side portion is executed by the cutting device that cuts the glass plate along the cutting trajectory extending in a straight line, the reference side portion is orthogonal to the cutting trajectory. The positioning step may be performed so as to extend following the positioning line.

In the method according to the present invention, it is possible to reliably position the glass plate. Therefore, when the cutting step of cutting the glass plate in the direction orthogonal to the reference side portion is executed by the above-mentioned cutting device, if the positioning step is executed as described above, the side portion and the reference side formed in the cutting step are executed. The portions can be formed at right angles with high accuracy.

In the above method, before executing the positioning step, the glass plate is cut to form two side portions extending parallel to each other on the glass plate, and in the positioning step, one of the two side portions is set as a reference side. It is preferable to form two side portions extending in a direction orthogonal to the above two side portions on the glass plate by executing the cutting step.

In this way, two sides extending parallel to each other are formed on the glass plate before the positioning step is executed, and the two sides are orthogonal to the two sides in the cutting step executed after the positioning step. By forming the two side portions extending in the direction, a rectangular glass plate which is a glass plate having a typical shape can be obtained. From this, according to this method, it is possible to obtain a rectangular glass plate by executing the positioning step only once.

In the above method, the glass plate may be a flexible glass film.

According to the method according to the present invention, even when the thickness of the glass plate is extremely thin, its positioning is possible. Therefore, when the glass plate is a flexible glass film, the effect can be utilized more effectively by applying the method according to the present invention.

According to the present invention, the positioning of the glass plate can be performed regardless of the thickness of the glass plate.

It is a top view which shows the glass plate manufacturing apparatus used in the glass plate manufacturing method which concerns on embodiment of this invention. It is a side view which shows the glass plate manufacturing apparatus used in the glass plate manufacturing method which concerns on embodiment of this invention. It is a figure which shows the 1st image and the 2nd image which were imaged in the manufacturing method of the glass plate which concerns on embodiment of this invention.

Hereinafter, a method for manufacturing a glass plate according to an embodiment of the present invention will be described with reference to the accompanying drawings. First, the configuration of the glass plate manufacturing apparatus used in the glass plate manufacturing method according to the embodiment of the present invention will be described.

In the glass plate manufacturing apparatus 1 shown in FIGS. 1 and 2, a reference side portion 2a, which is a reference for positioning a flexible glass film 2 (for example, a thickness of 300 μm or less), extends along the positioning line 3. As described above, it is an apparatus for executing the positioning step of positioning the glass film 2 and the cutting step of cutting the positioned glass film 2.

The glass plate manufacturing apparatus 1 includes a mounting table 4 on which the glass film 2 is placed, a first camera 5 as a first imaging means for accommodating the first section 3a on the positioning line 3 in the field of view 5a, and a positioning line 3. The second camera 6 as the second imaging means for accommodating the second section 3b of the above in the field of view 6a, the display device 9 for displaying the first image 7 and the second image 8 captured by both cameras 5 and 6, respectively, and the planned disconnection A cutting device 11 that cuts the glass film 2 along the line 10 and a first light source 13 and a second light source 14 that emit light 12 that illuminates the reference side portion 2a of the glass film 2 are provided as main components. .. The positioning line 3 in the present embodiment is a virtual line extending in a direction orthogonal to the planned cutting line 10 along the support surface 4a formed on the mounting table 4.

Both cameras 5 and 6 of the first camera 5 and the second camera 6 have different sections on the positioning line 3 in the field of view, and the first section 3a and the first section 3a that the first camera 5 has in the field of view 5a. The two cameras 6 are separated from each other from the second section 3b within the field of view 6a. The fields of view 5a and 6a are equal in width to each other. Further, both visual fields 5a and 6a evenly straddle both sides with the positioning line 3 as a boundary.

The first camera 5 is installed in a state of being fixed at a fixed point on the surface 2b side (upper surface side) of the glass film 2, and the field of view 5a is fixed. That is, the position of the first section 3a is fixed on the positioning line 3. The second camera 6 is installed on the surface 2b side of the glass film 2 like the first camera 5, but unlike the first camera 5, it can be moved in parallel with the positioning line 3. There is. The second camera 6 is configured to move its field of view 6a along the positioning line 3 as it moves. As a result, the distance S between the two visual fields 5a and 6a can be changed, and the location position of the second section 3b on the positioning line 3 can be changed as the second camera 6 moves. Is possible. Each of the cameras 5 and 6 has an optical axis tilted with respect to the surface 2b of the glass film 2. Further, the second camera 6 can be moved in parallel with the positioning line 3 while maintaining its posture.

The cutting device 11 is formed so that a local heating part by laser irradiation and a local cooling part by refrigerant injection are adjacent to each other on the planned cutting line 10, and the reference side is generated by the thermal stress generated due to the temperature difference between the two parts. It is a device that executes laser cutting that gradually forms the cut portion 15 by advancing the initial crack formed in the portion 2a. The cutting device 11 is capable of cutting the glass film 2 along a cutting trajectory extending in a straight line in a direction orthogonal to the positioning line 3. As the cutting device 11, a device that executes laser fusing or a device that executes folding may be used.

The first light source 13 and the second light source 14 are arranged on the surface 2b side of the glass film 2 and are arranged so as to face the first camera 5 and the second camera 6, respectively, with the positioning line 3 interposed therebetween. .. The second light source 14 can be moved in parallel with the positioning line 3, and when the second camera 6 is moved, it can be moved to a position facing the second camera 6. Each of the light sources 13 and 14 has an optical axis tilted in the direction opposite to that of the cameras 5 and 6 with respect to the surface 2b of the glass film 2, and the light sources 13 and 14 are positioned respectively. It is oriented to line 3. Then, both the light sources 13 and 14 mirror-reflect (normally reflect) the light 12 emitted from themselves on the surface 2b of the glass film 2 and then enter the first camera 5 and the second camera 6, respectively. It is configured to emit light 12. As both the light sources 13 and 14, for example, LED flat plate illumination lamps can be used.

A foamed resin sheet 16 as a low reflectance member is laid on the support surface 4a formed on the mounting table 4, and the mounting table 4 places the glass film 2 on the back surface 2c side (lower surface side) via the foamed resin sheet 16. ) To support. The foamed resin sheet 16 is formed to be one size larger than the glass film 2, and the entire circumference of the outer peripheral edge of the foamed resin sheet 16 is in a state of protruding from the outer peripheral edge of the glass film 2. Further, the foamed resin sheet 16 is made of a foamed resin having a lower reflectance to visible light than the glass film 2 and easily diffuse-reflecting (diffusely reflecting) the light 12 emitted from the first light source 13 and the second light source 14. .. As a result, when both the partial sections 2aa and 2ab of the reference side portion 2a and the foamed resin sheet 16 are projected on the first image 7 and the second image 8, the reference side portion 2a is relatively It is projected brightly and the foamed resin sheet 16 is projected relatively darkly so that the reference side portion 2a can be easily identified on both images 7 and 8.

Here, in order to make it easier to identify the reference side portion 2a on both images 7 and 8, it is preferable that the reflectance of the foamed resin sheet 16 is 50% or less based on the reflectance of the glass film 2. Further, in order to make it easier to identify the reference side portion 2a on both images 7 and 8, not only the foamed resin sheet 16 but also the mounting table 4 may have a lower reflectance to visible light than the glass film 2. preferable. Further, with respect to the light 12 emitted from the first light source 13 and the second light source 14, the smaller the incident angle θ1 and the reflection angle θ2 with respect to the surface 2b of the glass film 2, the more the first light source 13 to the first camera 5 and , It is easy to narrow the flat installation range from the second light source 14 to the second camera 6, and it is easy to save space. Therefore, the magnitudes of the incident angle θ1 and the reflection angle θ2 are preferably 30 ° or less, and more preferably 10 ° or less.

A plurality of pins 17 are embedded in the mounting table 4 at intervals from each other as auxiliary marks for assisting the positioning, and the plurality of pins 17 are arranged along a straight line parallel to the positioning line 3. .. Further, the distance between the plurality of pins 17 is adjusted so that at least one pin 17 fits in each of the field of view 5a of the first camera 5 and the field of view 6a of the second camera 6. This makes it easier to grasp the relative positional relationship between the reference side portion 2a of the glass film 2 and the fields of view 5a and 6a of both cameras 5 and 6 based on the pin 17.

As shown in FIG. 3, the display device 9 enlarges and displays the first monitor 18 which enlarges and displays the first image 7 captured by the first camera 5, and the second image 8 captured by the second camera 6. The second monitor 19 to be displayed is arranged in parallel. Both images 7 and 8 are displayed so as to have the same size as each other. Further, the magnifications of enlargement in both images 7 and 8 are equal to each other, and the scales are equal between both images 7 and 8.

In each of the first image 7 and the second image 8, a positioning target line 20 corresponding to the positioning line 3 and a rectangular frame 21 evenly straddling both sides with the positioning target line 20 as a boundary are displayed. .. The frame 21 includes a pair of positioning auxiliary lines 21a, 21a extending in parallel with the positioning target line 20. When both images 7 and 8 are viewed in a plan view, the positioning target lines 20 and the positioning auxiliary lines 21a are located on the same straight line between the images 7 and 8.

The positioning target line 20 is a reference side projected on both images 7 and 8 when the glass film 2 is ideally positioned so that the total length of the reference side portion 2a completely overlaps with the positioning line 3. It is a line that completely overlaps with the partial sections 2aa and 2ab of the part 2a. On the other hand, the positioning auxiliary line 21a is a line that serves as a mark indicating an allowable range of inclination of the reference side portion 2a with respect to the positioning line 3. More specifically, in at least one of both images 7 and 8, when the projected partial section 2aa (2ab) of the reference side portion 2a and the positioning auxiliary line 21a intersect, or in the reference side portion 2a. When the partial section 2aa (2ab) passes outside the frame 21, it indicates that the inclination of the reference side portion 2a with respect to the positioning line 3 exceeds the allowable range. The distance D between the pair of positioning auxiliary lines 21a and 21a can be arbitrarily set according to the required positioning accuracy. Then, the narrower the interval D, the more the positioning accuracy can be improved.

Hereinafter, an embodiment of the method for manufacturing a glass plate according to the embodiment of the present invention will be described using the above-mentioned glass plate manufacturing apparatus 1. Here, a case of manufacturing a rectangular glass film will be described as an example.

First, before executing the positioning step, the glass film 2 placed on the mounting table 4 is cut twice in parallel by the cutting device 11 to form two sides extending in parallel with each other on the glass film 2. .. As a result, out of the four sides of the finally obtained rectangular glass film, only two parallel sides are cut out.

Next, one of the two cut-out side portions is determined as the reference side portion 2a of the glass film 2 as the reference for positioning. Then, after the orientation of the glass film 2 is changed by approximately 90 ° in a plan view on the mounting table 4, the glass film extends so that the reference side portion 2a extends along the positioning line 3 orthogonal to the cutting trajectory of the cutting device 11. The positioning step of positioning 2 is executed.

In the positioning step, first, by moving the second camera 6 in parallel with the positioning line 3, the field of view 5a of the first camera 5 and the field of view 6a of the second camera 6 are adjusted according to the length of the total length of the reference side portion 2a. Adjust the interval S between and. Here, for the purpose of improving the positioning accuracy, it is preferable that the interval S is widened as much as possible within a range that does not exceed the total length of the reference side portion 2a.

When the adjustment of the interval S is completed, the operator performing the positioning operation moves the glass film 2 so that the reference side portion 2a approaches the plurality of pins 17 embedded in the mounting table 4. As a result, the reference side portion 2a approaches the field of view 5a of the first camera 5 and the field of view 6a of the second camera 6. In this work, the partial sections 2aa and 2ab of the reference side portion 2a are projected on both the first image 7 displayed on the first monitor 18 and the second image 8 displayed on the second monitor 19, respectively. Will continue until. Here, the movement of the glass film 2 and the above-mentioned change of orientation are performed together with the foamed resin sheet 16 that supports the glass film 2.

When the partial sections 2aa and 2ab of the reference side portion 2a are projected on both the first image 7 and the second image 8, the operator can perform a part of the reference side portion 2a in both the images 7 and 8. The position of the glass film 2 is adjusted while looking at both the first monitor 18 and the second monitor 19 so that the sections 2aa and 2ab pass through the inside of the frame 21 without intersecting the positioning auxiliary line 21a. To do. When this adjustment is completed, the positioning step is completed, and the glass film 2 is positioned with the inclination of the reference side portion 2a with respect to the positioning line 3 within the allowable range.

Finally, with the execution of the cutting step, the positioned glass film 2 is cut twice in parallel by the cutting device 11 to cut out the remaining two sides of the rectangular glass film. By completing this cutting step, a rectangular glass film is obtained.

Hereinafter, the main actions and effects of the above glass plate manufacturing method will be described.

In the above method for manufacturing a glass plate, it is not necessary to bring the reference side portion 2a of the glass film 2 into contact with an external object when positioning the glass film 2. Therefore, even if the object of positioning is a glass film 2 having an extremely thin thickness, a situation in which the reference side portion 2a is bent and deformed due to contact with an external object cannot inevitably occur. Therefore, according to this method, the positioning of the glass plate can be performed regardless of the thickness of the glass plate.

Here, the method for producing a glass plate according to the present invention is not limited to the embodiment described in the above embodiment. In the above embodiment, the glass film is positioned by the operator, but the device for manufacturing the glass plate may be configured as follows and the device may be used for positioning. For example, the mounting table is configured to be movable in a direction along the positioning line and in a direction orthogonal to the direction, and is configured to be able to rotate around an axis extending vertically, so that the mounting table can be moved and rotated. Along with this, the glass film placed on the glass film may be moved for positioning.

Further, in the above embodiment, when positioning the glass film, a frame is displayed on each of the first image and the second image, and a part of the reference side portion projected on each of the images is displayed on the frame. The adjustment is made so that it passes through the inside of the frame without intersecting the included positioning auxiliary line. However, this is not the case, and the first image itself and the second image itself can act as a frame. That is, by making the straight line portion extending parallel to the positioning line of the outer peripheral contours of both images function as a positioning auxiliary line, the first image itself and the second image itself can serve as a frame. .. In this case, in order to improve the positioning accuracy, it is preferable that the field of view of the first camera and the field of view of the second camera are as narrow as possible.

Further, in the above embodiment, the light emitted from the first light source and the second light source is mirror-reflected on the surface of the glass film and then entered into the first camera and the second camera, respectively. is not. For example, of both light sources and both cameras, one is arranged on the front surface side of the glass film and the other is arranged on the back surface side of the glass film, and the light emitted from each of the two light sources is transmitted through the glass film. After that, each of the two cameras may be illuminated. Specific examples include the following forms. That is, both light sources in the above embodiment are arranged below the mounting table, and holes are formed in the mounting table. Then, the light that has passed through the hole enters the back surface of the glass film, passes through the glass film, and then enters each of the cameras. When this form is adopted, it is preferable that at least the reference side portion of the outer peripheral edge of the glass film protrudes from the outer peripheral edge of the foamed resin sheet.

In addition, the method for producing a glass plate according to the present invention can be applied not only to thin glass such as a flexible glass film but also to the production of a non-flexible and thick glass plate. .. Further, in the method for manufacturing a glass plate according to the present invention, it is not always necessary to execute the cutting step after executing the positioning step. Therefore, the present invention can be applied to a case where the positioned glass plate is subjected to a process other than cutting, for example, processing of an end face (side portion) after the positioning step is executed. ..

2 Glass film 2a Reference side part 2aa Partial section of reference side part 2ab Partial section of reference side part 2b Front side 2c Back side 3 Positioning line 3a First section 3b Second section 4 Mounting stand 5 First camera 5a First camera Field of view 6 Second camera 6a Field of view of second camera 7 First image 8 Second image 11 Cutting device 12 Light 13 First light source 14 Second light source 16 Foamed resin sheet 17 pin 20 Positioning target line 21a Positioning auxiliary line S Interval

Claims (11)

A method for manufacturing a glass plate, which includes a positioning step of positioning the glass plate so that a reference side portion of the glass plate serving as a positioning reference extends along a positioning line.
The glass plate is a flexible glass film.
Install a mounting table on which the glass plate is placed,
It has a foamed resin sheet that supports the glass plate on the above-mentioned table.
Using the first imaging means for capturing the first section on the positioning line in the field of view and the second imaging means for capturing the second section different from the first section on the positioning line in the field of view,
The foamed resin sheet is moved so that a part of the reference side portion is projected on both the first image captured by the first imaging means and the second image captured by the second imaging means. while adjusting by performing the method for producing a glass plate, wherein the execution to Rukoto the positioning step of the glass plate on the mounting table. The method for manufacturing a glass plate according to claim 1, wherein a positioning target line corresponding to the positioning line is displayed on each of the first image and the second image. The claim is characterized in that, for each of the first image and the second image, marks indicating an allowable range of inclination of the reference side portion with respect to the positioning line are displayed on both sides of the positioning target line as a boundary. 2. The method for manufacturing a glass plate according to 2. The method for manufacturing a glass plate according to claim 3, wherein the mark is a positioning auxiliary line extending in parallel with the positioning target line. 4. The fourth aspect of the present invention is characterized in that both images are displayed side by side between the first image and the second image so that the positioning target lines and the positioning auxiliary lines are located on the same straight line. The method for manufacturing a glass plate according to the description. Claims 1 to 5 are characterized in that auxiliary marks for assisting positioning are provided in each of a portion of the pedestal described above that fits in the field of view of the first imaging means and a portion that fits in the field of view of the second imaging means. The method for manufacturing a glass plate according to any one. The first imaging means and the second imaging means are arranged on the surface side of the glass plate .
The glass plate according to claim 1 to 6, wherein a light source is arranged so that the light mirror-reflected on the surface of the glass plate enters the first imaging means and the second imaging means, respectively. Manufacturing method. The method for manufacturing a glass plate according to any one of claims 1 to 7 , wherein the distance between the visual field of the first imaging means and the visual field of the second imaging means can be changed. The method for manufacturing a glass plate according to claim 8 , wherein the field of view of the first imaging means is fixed and the field of view of the second imaging means is movable. When performing a cutting step of cutting the glass plate in a direction orthogonal to the reference side portion by a cutting device that cuts the glass plate along a cutting trajectory extending in a straight line, the reference side portion is orthogonal to the cutting trajectory. The method for manufacturing a glass plate according to any one of claims 1 to 9 , wherein the positioning step is executed so as to extend along the positioning line. Prior to performing the positioning step, the glass plate is cut to form two sides extending parallel to each other on the glass plate.
In the positioning step, one of the two side portions is used as the reference side portion.
The method for manufacturing a glass plate according to claim 10 , wherein the execution of the cutting step forms two side portions extending in a direction orthogonal to the two side portions on the glass plate.

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