JP2017160064A - Production method of glass plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable positioning of a glass plate of any thickness.SOLUTION: A production method of a glass plate includes a positioning step for positioning a glass film 2 so that a reference side 2a of the glass film 2 which is a reference of positioning extends along a positioning line 3. By using a first camera 5 keeping a first section 3a on the positioning line 3 in its field of view 5a, and a second camera 6 keeping a second section 3b different from the first section 3a in its field of view 6a, the positioning step is executed by adjusting so that partial sections 2aa and 2ab of the reference side 2a are displayed in a first picture 7 taken by the first camera 5 and a second picture 8 taken by the second camera 6 respectively.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method of manufacturing a glass plate including 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 typical glass plate. As an example of a method for manufacturing the rectangular glass plate, a method of cutting the rectangular glass plate from the mother glass plate by cutting the mother glass plate from which the rectangular glass plate is based can be cited. When employing such a method, for example, the following first to third steps are executed.

  First, as a first step, by cutting the mother glass plate 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 serving as a positioning reference, and the direction of the mother glass plate is changed by approximately 90 ° in a plan view. The mother glass plate is positioned so as to follow the positioning line perpendicular to the cutting track of the cutting device. Finally, as the third step, the remaining two sides of the rectangular glass plate are cut out by cutting the positioned mother glass plate twice in parallel with a cutting device. Through 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 using, for example, the method disclosed in Patent Document 1. In the method disclosed in the document, a reference side part (edge in the same document) extending in the vertical direction of the glass plate placed on the processing table is brought into contact with two positioning pins, and a reference side part extending in the horizontal direction. This is a method of positioning the glass plate by bringing it into contact with one positioning pin. When this method is used for positioning performed in the second step, it is possible to perform positioning using only one side contacting the two positioning pins as a reference side. In this case, a straight line passing through the two positioning pins is a positioning line that the reference side portion should follow.

JP2013-91126A

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

  That is, in recent years, thinning of a glass plate has been promoted rapidly, and a glass plate (glass film) that has been thinned to a film shape has been developed and manufactured. Since such a glass plate is extremely thin, the glass plate is easily bent only by a slight external force. For this reason, when the above method is used, the inclination of the reference side with respect to the positioning line increases the allowable range due to the deformation of the reference side of the glass plate caused by contact with the positioning pin. There was a problem that deviated.

  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 However, it is not formed to have a right angle, and as a result, it becomes impossible to obtain a rectangular glass plate itself. Under such circumstances, it has been expected to develop a technique capable of positioning regardless of the thickness of the glass plate including the case where the thickness of the glass plate is extremely thin.

  This invention made | formed in view of said situation makes it the technical subject to enable the positioning regardless of the thickness of the glass plate.

  The present invention devised to solve the above problems is a method for manufacturing a glass plate including a positioning step for positioning the glass plate so that a reference side portion of the glass plate serving as a positioning reference extends along the positioning line. A first imaging means for accommodating a first section on a positioning line in a field of view and a second imaging means for accommodating a second section different from the first section on the positioning line in a field of view. The positioning step is executed by adjusting the first side image captured by the imaging unit and the second image captured by the second imaging unit so that a partial section of the reference side portion is projected. Characterized by

  In this method, both the first imaging means and the second imaging means have different sections on the positioning line in the field of view. From this, if a partial section of the reference side is projected on both the first image and the second image respectively captured by the two imaging units, the reference side inevitably extends along the positioning line. Thus, the glass plate is positioned. From the above, if the adjustment is performed so that a partial section of the reference side portion is projected in both images, the positioning of the glass plate is completed. And in this method, when positioning a glass plate, it becomes unnecessary to contact | abut the reference | standard side part of a glass plate with external objects, such as a positioning pin. Therefore, even if 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 necessarily occur. Therefore, according to this method, positioning can be performed regardless of the thickness of the glass plate.

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

  In this way, since the positioning target line corresponding to the positioning line is displayed in each of both images, a part of the reference side portion projected on both images aiming at the positioning target line. However, if it adjusts so that it may follow a positioning target line, positioning accuracy can be improved.

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

  For each field of view of both imaging means, if the field of view along the direction perpendicular to the positioning line is too wide, even if a partial section of the reference side is projected on both images, the reference side There is a possibility that the portion is inclined beyond the allowable range with respect to the positioning line. However, if a mark indicating the allowable range of the inclination of the reference side with respect to the positioning line is displayed on both sides of each of the images with the positioning target line as a boundary, the above-described possibility can be surely eliminated. it can. This can be achieved by adjusting the reference side part so that a part of the reference side part fits between the mark displayed on one side with the positioning target line as the boundary and the mark displayed on the other side. This is because the inclination of the side can be surely kept within the allowable range. Further, by displaying both marks, the following effects can be obtained as secondary effects. That is, the positioning operation is completed only by allowing a part of the reference side portion to fall between the marks, so that the operation can be performed efficiently.

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

  In this way, 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. Therefore, the allowable range can be easily displayed on both images. Can be recognized. As a result, the positioning operation 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 positioned on the same straight line between the first image and the second image.

  In this way, since the first image and the second image are displayed side by side, both images can be easily viewed at the same time. In addition, since the positioning target lines and the positioning auxiliary lines are positioned 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 a boundary. It is extremely advantageous to perform adjustment for accommodating both of the images at the same time so that a part of the reference side portion is placed between them.

  In the above method, a mounting table on which the glass plate is mounted is installed, and an auxiliary for assisting positioning in each of the place that fits in the field of view of the first image pickup means and the place that fits in the field of view of the second image pickup means. It is preferable to provide a mark.

  In this way, in the mounting table, by providing auxiliary marks at locations that fit in the respective fields of view of both imaging means, the reference side of the glass plate placed on the mounting table, and the respective imaging means The relative positional relationship with the visual field can be easily grasped based on the auxiliary landmarks. As a result, the reference side can be quickly stored in the respective fields of view of both imaging means, and a partial section of the reference side can be quickly displayed on both images. As a result, the positioning operation 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 low reflection with a lower reflectance to visible light than the glass plate is provided between the back surface of the glass plate and the mounting table. It is preferable to arrange the light source so that the light specularly reflected on the surface of the glass plate enters the first image pickup means and the second image pickup means in a state where the rate member is 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 image pickup means. When the amount of light is compared with the amount of light that enters each of the image pickup 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 easy to identify a partial section of the reference side 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, after reflecting on the surface of the glass plate, the amount of light that enters each of the imaging means and reflected by the low reflectance member. After that, it becomes easy to provide a significant difference in the amount of light entering each of the image pickup means. As a result, it becomes easier to identify a partial section of the reference side on both images. In addition, by placing a foamed resin sheet between the back surface of the glass plate and the mounting table, it is possible to suitably avoid damaging the back surface of the glass plate due to sliding with the mounting table or the like. Become.

  In the above method, it is preferable that the interval between the visual field of the first imaging unit and the visual field of the second imaging unit can be changed.

  The glass plate is positioned more accurately as the partial section of the reference side projected on the first image and the partial section of the reference side projected on the second image are separated from each other. In other words, positioning accuracy can be improved, so that the space | interval between the visual field of a 1st imaging means and the visual field of a 2nd imaging means is widened. Therefore, if the distance between the two fields of view can be changed when the size of the glass plate to be positioned is changed and the length of the reference side is changed, a new one can be obtained. According to the length of the reference side part, the distance between the two visual fields can be expanded to the distance at which the desired positioning accuracy can be obtained.

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

  In the method according to the present invention, it is possible to reliably position the glass plate. Therefore, when performing the cutting process for cutting the glass plate in the direction orthogonal to the reference side by the above-described cutting device, if the positioning process is performed as described above, the side and the reference side formed in the cutting process The portion can be accurately formed at a right angle.

  In the above method, before execution of the positioning step, the glass plate is cut to form two sides extending parallel to the glass plate, and in the positioning step, one of the two sides is set as a reference side. It is preferable to form two sides extending in the direction perpendicular to the two sides on the glass plate by performing the cutting step.

  If it does in this way, before execution of a positioning process, two sides which extend mutually in parallel will be formed in a glass board, and in a cutting process performed after a positioning process, it intersects perpendicularly with the above-mentioned two sides. By forming two side portions extending in the direction, a rectangular glass plate which is a glass plate having a typical shape is obtained. From this, according to this method, if a positioning process is performed only once, it is possible to obtain a rectangular glass plate.

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

  According to the method of the present invention, positioning can be performed even when the glass plate is extremely thin. For this reason, when the glass plate is a flexible glass film, the effect can be utilized more effectively if the method according to the present invention is applied.

  According to the present invention, positioning is possible regardless of the thickness of the glass plate.

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

  Hereinafter, the manufacturing method of the glass plate which concerns on embodiment of this invention is demonstrated with reference to attached drawing. First, the structure of the manufacturing apparatus of the glass plate used for the manufacturing method of the glass plate which concerns on embodiment of this invention is demonstrated.

  In the glass plate manufacturing apparatus 1 shown in FIGS. 1 and 2, a reference side portion 2 a that serves as a positioning reference for a flexible glass film 2 (for example, a thickness of 300 μm or less) extends along the positioning line 3. Thus, it is an apparatus for performing the positioning process which positions the glass film 2, and the cutting process which cut | disconnects the positioned glass film 2. FIG.

  The glass plate manufacturing apparatus 1 includes a mounting table 4 on which a glass film 2 is mounted, a first camera 5 serving as a first imaging unit that houses a first section 3a on the positioning line 3 in a visual field 5a, and a positioning line 3 A second camera 6 as a second imaging means for accommodating the second section 3b in the visual field 6a, a display device 9 for displaying the first image 7 and the second image 8 captured by the cameras 5 and 6, respectively, and a cutting schedule 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 2 a of the glass film 2 are provided as main components. . Note that 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 4 a formed on the mounting table 4.

  Both the 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 camera 3 and the first section 3a in the field of view 5a, The second camera 3 is spaced apart from the second section 3b in which the camera 6 fits in the visual field 6a. The visual fields 5a and 6a have the same width. Both visual fields 5a and 6a are evenly straddled on both sides with the positioning line 3 as a boundary.

  The 1st camera 5 is installed in the state fixed to the fixed point by the surface 2b side (upper surface side) of the glass film 2, and the visual field 5a is being fixed. That is, the location of the first section 3a is determined on the positioning line 3. Similar to the first camera 5, the second camera 6 is installed on the surface 2 b side of the glass film 2, but unlike the first camera 5, it can be moved in parallel with the positioning line 3. Yes. And the 2nd camera 6 becomes a structure which moves the visual field 6a along the positioning line 3 with an own movement. Thereby, it is possible to change the space | interval S between both the visual fields 5a and 6a, and to change the location position of the 2nd area 3b on the positioning line 3 with the movement of the 2nd camera 6. FIG. Is possible. Each of the cameras 5 and 6 has an attitude in which the optical axis is inclined with respect to the surface 2 b 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 by forming a local heating part by laser irradiation and a local cooling part by refrigerant injection adjacent to each other on the planned cutting line 10, and a reference side due to a thermal stress generated due to a temperature difference between the two parts. It is an apparatus that executes laser cleaving to gradually form the cutting part 15 by advancing the initial crack formed in the part 2a. The cutting device 11 can cut the glass film 2 along a cutting track extending in a straight line in a direction orthogonal to the positioning line 3. The cutting device 11 may be a device that performs laser fusing or a device that performs splitting.

  The first light source 13 and the second light source 14 are disposed on the surface 2b side of the glass film 2 and are disposed so as to face the first camera 5 and the second camera 6 with the positioning line 3 interposed therebetween. . The second light source 14 can be moved in parallel with the positioning line 3, and can be moved to a position facing the second camera 6 when the second camera 6 is moved. Each of the light sources 13 and 14 has an attitude in which the optical axis is inclined with respect to the surface 2b of the glass film 2 in the opposite direction to the cameras 5 and 6, and the light sources 13 and 14 are respectively positioned. Directed to line 3. And both the light sources 13 and 14 are made so that the light 12 radiate | emitted from itself may specularly reflect on the surface 2b of the glass film 2 (regular reflection), and may inject into the 1st camera 5 and the 2nd camera 6, respectively. The light 12 is emitted. In addition, as both the light sources 13 and 14, the flat plate illumination lamp of LED can be used, for example.

  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 allows the glass film 2 to be placed 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 slightly larger than the glass film 2, and the entire outer periphery of the foamed resin sheet 16 protrudes from the outer periphery of the glass film 2. Further, the foamed resin sheet 16 is made of a foamed resin that has a lower reflectance to visible light than the glass film 2 and easily diffuses (reflects) the light 12 emitted from the first light source 13 and the second light source 14. . Thereby, when both the partial sections 2aa and 2ab of the reference side 2a and the foamed resin sheet 16 are projected on the first image 7 and the second image 8, the reference side 2a is relatively It is projected brightly and the foamed resin sheet 16 is projected relatively dark so that the reference side 2a can be easily identified on both images 7 and 8.

  Here, in order to make it easier to identify the reference side 2a on both the images 7 and 8, the reflectance of the foamed resin sheet 16 is preferably set to 50% or less on the basis of the reflectance of the glass film 2. Further, in order to make it easier to identify the reference side portion 2 a on both images 7 and 8, not only the foamed resin sheet 16 but also the mounting table 4 may have a lower reflectance with respect to visible light than the glass film 2. preferable. Furthermore, with respect to the light 12 emitted from the first light source 13 and the second light source 14, respectively, as the incident angle θ1 and the reflection angle θ2 with respect to the surface 2b of the glass film 2 are reduced, from the first light source 13 to the first camera 5, and The planar installation range from the second light source 14 to the second camera 6 can be easily narrowed, and space saving can be facilitated. For this reason, 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 as auxiliary marks for assisting positioning at intervals, and the plurality of pins 17 are arranged along a straight line parallel to the positioning line 3. . The intervals between the plurality of pins 17 are adjusted such that at least one pin 17 is accommodated in each of the visual field 5a of the first camera 5 and the visual field 6a of the second camera 6. Thereby, based on the pin 17, it is easy to grasp the relative positional relationship between the reference side 2a of the glass film 2 and the visual fields 5a and 6a of the cameras 5 and 6.

  As shown in FIG. 3, the display device 9 enlarges the first monitor 18 that 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. The magnifications of the images 7 and 8 are equal to each other, and the scales of the images 7 and 8 are the same.

  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 21 a and 21 a extending in parallel with the positioning target line 20. In addition, when both the images 7 and 8 are planarly viewed, the positioning target lines 20 and the positioning auxiliary lines 21a are positioned on the same straight line between the images 7 and 8.

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

  Hereinafter, the aspect which performs the manufacturing method of the glass plate which concerns on embodiment of this invention using said glass plate manufacturing apparatus 1 is demonstrated. Here, a case where a rectangular glass film is manufactured will be described as an example.

  First, before execution of the positioning step, the glass film 2 placed on the placing table 4 is cut twice in parallel by the cutting device 11 to form two side portions extending in parallel with each other on the glass film 2. . Thereby, out of the four sides of the rectangular glass film finally obtained, first, only two parallel sides are cut out.

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

  In the positioning step, first, the second camera 6 is moved in parallel with the positioning line 3, so that the field of view 5a of the first camera 5 and the field of view 6a of the second camera 6 are matched to the length of the reference side 2a. The distance S between each other is adjusted. Here, for the purpose of improving positioning accuracy, the interval S is preferably widened as much as possible within a range not exceeding the total length of the reference side 2a.

  When the adjustment of the interval S is completed, the operator who performs the positioning operation moves the glass film 2 so that the reference side 2a approaches the plurality of pins 17 embedded in the mounting table 4. As a result, the reference side 2 a approaches the visual field 5 a of the first camera 5 and the visual field 6 a of the second camera 6. In this operation, partial sections 2aa and 2ab of the reference side 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. Will continue until. Here, the movement of the glass film 2 and the change in the direction described above 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 2a are projected on both the first image 7 and the second image 8, respectively, the operator can view a part of the reference side 2a in both the images 7 and 8. Adjust the position of the glass film 2 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 crossing the positioning auxiliary line 21a. To do. When this adjustment is completed, the positioning process is completed, and the glass film 2 is positioned in a state where the inclination of the reference side 2a with respect to the positioning line 3 is within an allowable range.

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

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

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

  Here, the manufacturing method of the glass plate which concerns on this invention is not limited to the aspect demonstrated by said embodiment. In the above embodiment, the glass film is positioned by an operator. However, the above glass plate manufacturing apparatus may be configured as follows, and the apparatus may be positioned. 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 capable of rotating about an axis extending vertically, so that the mounting table can be moved and rotated. Along with this, the glass film placed thereon 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 partial section of the reference side portion projected on each of the images is displayed on the frame. Adjustment is performed so as to pass through the inside of the frame without crossing the included positioning auxiliary line. However, the present invention is not limited to this, and the first image itself and the second image itself can also serve as a frame. That is, the first image itself and the second image itself can serve as a frame by causing a straight line portion extending in parallel with the positioning line to function as a positioning auxiliary line in the outer peripheral contours of both images. . In this case, in order to improve the positioning accuracy, it is preferable to narrow the field of view of the first camera and the field of view of the second camera as much as possible.

  Furthermore, in the above embodiment, the light emitted from the first light source and the second light source is specularly reflected on the surface of the glass film and then incident on the first camera and the second camera, respectively. is not. For example, one of the two light sources and the two cameras is arranged on the front side of the glass film and the other is arranged on the back side of the glass film, and the light emitted from each of the two light sources is transmitted through the glass film. Then, the light may enter each of both cameras. Specific examples include the following forms. That is, both the light sources in the above embodiment are arranged below the mounting table, and a hole is formed in the mounting table. And it can be set as the form which the light which passed the hole enters into the back surface of a glass film, permeate | transmits a glass film, and enters into each of both cameras. In the case of adopting this form, it is preferable that at least the reference side portion protrudes from the outer peripheral end of the foamed resin sheet among the outer peripheral ends of the glass film.

  In addition, the glass plate manufacturing method according to the present invention can be applied not only to a thin glass plate such as a flexible glass film but also to a glass plate having a large thickness without flexibility. . Moreover, in the manufacturing method of the glass plate which concerns on invention, it is not necessary to necessarily perform a cutting process after execution of a positioning process. Therefore, the present invention can be applied to a case where processing other than cutting, for example, processing of an end face (side portion) is performed on the positioned glass plate after performing the positioning step. .

2 glass film 2a reference side 2aa part of reference side 2ab part of reference side 2b surface 2c back 3 positioning line 3a first section 3b second section 4 mounting table 5 first camera 5a first camera 5a 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 (12)

A glass plate manufacturing method including 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,
Using the first imaging means for accommodating the first section on the positioning line in the field of view, and the second imaging means for accommodating the second section different from the first section on the positioning line in the field of view,
By performing adjustment so that a partial section of the reference side portion is projected on both the first image captured by the first imaging unit and the second image captured by the second imaging unit, A method for producing a glass plate, comprising performing a positioning step.   The glass plate manufacturing method 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.   2. A mark indicating an allowable range of inclination of the reference side with respect to the positioning line is displayed on both sides of the first image and the second image with the positioning target line as a boundary. The manufacturing method of the glass plate of 2.   The method for manufacturing a glass sheet according to claim 3, wherein the mark is a positioning auxiliary line extending in parallel with the positioning target line.   The both images are displayed side by side so that the positioning target lines and the positioning auxiliary lines are positioned on the same straight line between the first image and the second image. The manufacturing method of the glass plate of description. Installing a mounting table for mounting the glass plate;
6. An auxiliary mark for assisting positioning is provided at each of a place that falls within the field of view of the first image pickup means and a place that falls within the field of view of the second image pickup means on the mounting table. The manufacturing method of the glass plate in any one. The first imaging means and the second imaging means are arranged on the front surface side of the glass plate, and the reflectivity for visible light is lower than the glass plate between the back surface of the glass plate and the mounting table. With the reflectance member laid,
The glass plate manufacturing method according to claim 6, wherein a light source is arranged so that the light specularly reflected on the surface of the glass plate enters the first imaging unit and the second imaging unit, respectively. Method.   The method for producing a glass plate according to claim 7, wherein the low reflectance member is a foamed resin sheet.   The method for manufacturing a glass plate according to any one of claims 1 to 8, wherein an interval between the visual field of the first imaging unit and the visual field of the second imaging unit can be changed.   When performing a cutting step of cutting the glass plate in a direction orthogonal to the reference side by a cutting device that cuts the glass sheet along a straight cutting track, the reference side is orthogonal to the cutting track. The method for manufacturing a glass sheet according to claim 1, wherein the positioning step is performed so as to extend along the positioning line. Before execution of the positioning step, the glass plate is cut to form two sides extending parallel to the glass plate,
In the positioning step, one of the two sides is the reference side,
The method of manufacturing a glass plate according to claim 10, wherein two side portions extending in a direction orthogonal to the two side portions are formed on the glass plate by performing the cutting step.   The said glass plate is a glass film which has flexibility, The manufacturing method of the glass plate in any one of Claims 1-11 characterized by the above-mentioned.

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