JP2017226549A - Manufacturing method of sheet glass and manufacturing apparatus of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely cut a sheet glass along a scribe line by bending stress even if a flexure is generated in the sheet glass.SOLUTION: A manufacturing method of a sheet glass includes a cutting step in which a scribe line S is formed in a surface Gx side of a boundary part between a first region Ga and a second region Gb of the sheet glass and the sheet glass G is cut along the scribe line S. In the cutting step, while a back surface Gy side of the first region Ga is supported by a back surface supporting member 3, and while a rolling element 4 is rolled along a surface Gx of the second region Gb, the sheet glass G is cut along the scribe line S by pushing the rolling element 4 into the back surface Gy side of the second region Gb.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an improvement in a manufacturing technique of a plate glass including a step of cleaving a plate glass along a scribe line.

  As is well known, flat glass displays used in various fields such as glass substrates for flat panel displays (FPD) such as liquid crystal displays, plasma displays, and organic EL displays, and cover glasses for organic EL lighting. In many cases, the manufacturing process includes a step of cutting a small-area plate glass from a large-area plate glass or trimming an edge portion along the side of the plate glass. In such a process, it is customary to form a scribe line on the plate glass and then cleave the plate glass along the scribe line.

  As a specific example of the sheet glass cleaving method, for example, a method disclosed in Patent Document 1 can be cited. In the method disclosed in this document, after the scribe line is formed on the surface of the plate glass, the plate-shaped folding bar is brought into contact with the surface of the plate glass in the vicinity of the scribe line, and in this state, the plate glass is moved to the back side by the folding bar. Push into. By the pushing operation of the folding bar, a bending stress is applied in the vicinity of the scribe line, and the plate glass is cut along the scribe line.

International Publication No. 2014/017577

  However, as disclosed in Patent Document 1, when a plate-shaped folding bar is pushed in and bending stress is applied, the plate glass may be bent before being broken. In this case, along with the bending of the plate glass, the surface of the plate glass easily changes to a curved surface, or the angle of the plate glass with respect to the folding bar tends to change. Therefore, the contact state between the folding bar and the plate glass tends to become unstable. If the folding bar is forcibly pushed in such an unstable contact state, slippage occurs between the folding bar and the plate glass, and the bending stress does not sufficiently act on the plate glass, so that the plate glass is scribed with a scribe line. May not be cleaved accurately along. Such a problem becomes more prominent as the thickness of the plate glass to be cut becomes thinner and the deflection becomes larger.

  Even if it is a case where bending arises in plate glass, this invention makes it a subject to cut the plate glass along a scribe line reliably by bending stress.

  The present invention created to solve the above problems includes a cleaving step of forming a scribe line on the surface side of the boundary between the first region and the second region of the plate glass and cleaving the plate glass along the scribe line. In the manufacturing method of plate glass, in the cleaving step, while the back surface side of the first region is supported by the back surface support member, while rolling the rolling element along the surface of the second region, the second region is backed by the rolling element. The glass sheet is cut along the scribe line by being pushed to the side. According to such a configuration, the rolling element pushes in the plate glass while rolling along the surface of the second region of the plate glass. Therefore, even if the plate glass is bent, the rolling element follows the angle and shape change of the plate glass. . For this reason, the contact state between the rolling element and the plate glass is stabilized, and unfair slippage is unlikely to occur between the rolling element and the plate glass. Therefore, even when bending occurs in the plate glass, bending stress acts sufficiently in the vicinity of the scribe line located between the rolling elements and the back surface support member, and the plate glass can be reliably cut along the scribe line. .

  In the above configuration, in the cleaving step, the plate glass may be supported by being suspended so that the scribe line is directed in the vertical direction. In this way, when handling the sheet glass in a vertical position supported by hanging in the upstream process of the cleaving process, the sheet glass is smoothly conveyed to the cleaving process as it is without any significant attitude change. can do. Moreover, it can convey smoothly to a downstream process with the state which suspended and supported the plate glass after the cutting. Furthermore, since the plate glass supported by suspension is in a vertical posture, the floor area occupied by the plate glass is small, which leads to space saving.

  Said structure WHEREIN: It is preferable that a rolling element contacts the surface of a 2nd area | region in the position except the both ends of the glass plate which opposes in the longitudinal direction of a scribe line. If it does in this way, since a rolling element does not contact directly to the edge of a plate glass which is easy to break, it can prevent that a plate glass breaks starting from the edge of a plate glass in the position unrelated to a scribe line.

  Said structure WHEREIN: It is preferable that the scribe line is formed in the position except the both ends of the glass plate which opposes in the longitudinal direction of a scribe line. In this way, since the scribe line does not reach the edge of the sheet glass that is easily damaged, it is possible to prevent the sheet glass from being damaged starting from the edge of the sheet glass at an improper timing before cutting. .

  In the above configuration, the scribe line is formed at a position excluding both ends of the glass plate opposed in the longitudinal direction of the scribe line, and the rolling element is within a scribe line forming range excluding both ends of the scribe line. It is preferable to contact the surface of the second region alone. The inventor of the present application has confirmed that such a configuration allows the plate glass to be more reliably cleaved along the scribe line.

  In the above configuration, the rolling element may be a cylindrical roller having a rotation axis along the longitudinal direction of the scribe line. If it does in this way, the long continuous area | region of the plate glass along the longitudinal direction of a scribe line can be pushed in with one rolling element. Therefore, it is possible to efficiently apply a bending stress to the scribe line.

  In this case, the roller is preferably divided into a plurality of parts in the longitudinal direction of the scribe line. If it does in this way, it will become easy to adjust the position and number of rollers, for example, when the size of the plate glass to be cleaved is changed.

  In said structure, it is preferable that the thickness of plate glass is 0.3 mm or less. That is, with such a plate glass, the bending at the time of cleaving becomes large, so that the effect of the present invention is sufficiently exhibited.

  The present invention devised to solve the above-described problem includes a cleaving device that cleaves a plate glass having a scribe line formed on the surface side of the boundary between the first region and the second region along the scribe line. In the sheet glass manufacturing apparatus, the cleaving device includes a back surface supporting member that supports the back surface side of the first region, and a second rolling while rolling along the surface of the second region in order to cleave the sheet glass along the scribe line. A rolling element that pushes the region into the back side. According to such a configuration, it is possible to receive the same effect as the corresponding configuration already described.

  As described above, according to the present invention, even when bending occurs in the plate glass, the plate glass can be reliably cleaved along the scribe line by the bending stress.

It is a perspective view which shows the cleaving apparatus contained in the manufacturing apparatus of the plate glass which concerns on one Embodiment of this invention. It is the front view which expanded the principal part of the cleaving apparatus shown in FIG. It is sectional drawing of the cleaving apparatus shown in FIG. It is a figure which shows the cleaving process included in the manufacturing method of the plate glass which concerns on one Embodiment of this invention, Comprising: (a) is the state of the early stage of a cleaving process, (b) is the state of the middle stage of cleaving process, (c) is The final stage of the cleaving process is shown.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the accompanying drawings.

  As shown in FIG. 1, in the cleaving apparatus 1 included in the sheet glass manufacturing apparatus according to the embodiment of the present invention, the scribe line S is formed on the surface Gx side of the boundary portion between the first region Ga and the second region Gb. The formed glass sheet G is cleaved along the scribe line S by bending stress. In this embodiment, two scribe lines S are formed on the plate glass G, and the plate glass G is arranged in a vertical posture (preferably a vertical posture) so that each scribe line S faces the vertical direction. In this embodiment, the central portion in the width direction is a first region Ga that is a necessary portion of the plate glass G, and both end portions in the width direction are the second regions Gb that are unnecessary portions of the plate glass G. For example, when the glass sheet G is formed by the overflow downdraw method, the first region Ga is a product portion that is relatively thin, and the second region Gb is a non-product portion that includes a portion that is relatively thick. . Of course, both the first region Ga and the second region Gb may be required portions.

  The cleaving device 1 includes a first support device 2 that supports the plate glass G in a suspended manner, a back support member 3 that supports the back surface Gy side of the first region Ga of the plate glass G, and a surface Gx of the second region Gb of the plate glass G. A rolling element 4 that pushes the front surface Gx of the second region Gb of the glass sheet G toward the back surface Gy side while rolling along. The front surface Gx and the rear surface Gy of the plate glass G are main surfaces that face each other in the thickness direction of the plate glass 2. That is, the front surface Gx and the back surface Gy are terms for distinguishing the two main surfaces, and do not mean surfaces (upper surface, lower surface) facing in the vertical direction.

  The first support device 2 includes a rail member 21, a moving body 22 that slides along the rail member 21, and one or more upper support members 23 attached to the moving body 22.

  In this embodiment, a plurality of (two in the illustrated example) upper support members 23 are attached to one moving body 22, and the plurality of upper support members 23 are integrated with the rail member 21 as the moving body 22 moves. It is designed to move along. Since the rail member 21 is provided along the width direction of the plate glass G, the plate glass G is conveyed in the width direction along the front and back surfaces. The rail member 21 may be provided in a direction perpendicular to the front and back surfaces of the plate glass G, and the plate glass G may be conveyed in a direction perpendicular to the front and back surfaces.

  In this embodiment, the upper support member 23 is configured to sandwich and hold the upper part of the plate glass G from both the front and back sides in the first region Ga of the plate glass G. Here, since the upper end edge Gu of the plate glass G is easily damaged, the upper support member 23 is preferably configured to contact the plate glass G at a position avoiding the upper end edge Gu of the plate glass G. The plurality of upper support members 23 may be attached to independent moving bodies 22 so as to be able to approach and separate from each other. In this way, there is an advantage that tension can be applied to the plate glass G in the width direction, and even if the size of the plate glass G is changed, it is easy to adjust the support position of the plate glass G. is there. Further, the upper support member 23 may be configured to hold only one surface of the upper portion of the plate glass G by negative pressure adsorption in the first region Ga of the plate glass G. Further, the upper support member 23 does not need to be attached to the moving body 22, and may be configured to grip the upper end portion Gu during a folding operation described later.

  The back surface support member 3 is arranged in parallel with the scribe line S at an interval in the width direction of the plate glass G from the scribe line S at both ends in the width direction of the back surface Gy of the first region Ga of the plate glass G. The distance D1 in the width direction between the back support member 3 and the scribe line S is, for example, 10 to 30 mm (preferably 10 to 20 mm) (see FIG. 2). In this embodiment, the back surface support member 3 is a plate-like body (surface plate) in which a support surface that supports the back surface Gy of the first region Ga of the plate glass G is formed as a flat surface. In addition, the back surface support member 3 may be a round bar-like body having a curved support surface.

  The rolling elements 4 are arranged at intervals in the width direction of the plate glass G from the scribe line S in each second region Gb of the plate glass G. The distance D2 in the width direction between the rolling element 4 and the scribe line S at the position where the rolling element 4 first contacts the plate glass G is, for example, 70 to 130 mm (see FIG. 2). In this embodiment, the rolling element 4 is composed of a cylindrical roller having a rotating shaft 4 a parallel to the scribe line S. The diameter of the rolling element 4 is preferably 10 to 30 mm. The rolling element 4 is divided into a plurality (preferably three or more) in the vertical direction. Each of the divided rolling elements 4 is rotatable about the respective rotation shaft 4a. Although each of the rotating shafts 4a of the rolling elements 4 may be the same shaft that is continuous with each other, in this embodiment, they are independent shafts positioned on the same straight line. Each rolling element 4 is a free roller, and is driven to rotate along the surface Gx of the second region Gb of the plate glass G by a frictional force generated by contact with the surface Gx of the second region Gb of the plate glass G. ing. The rolling element 4 may be driven to rotate. Moreover, the rolling element 4 is not divided | segmented into the up-down direction, and may be comprised by one roller. Furthermore, the rolling element 4 is not limited to a roller as long as it can roll along the surface Gx of the second region Gb of the glass sheet G, and may be, for example, a spherical body (ball).

  The surface of the rolling element 4 is formed of a material that is unlikely to be scratched on the surface Gx of the second region Gb of the plate glass G and that does not easily slide between the surface Gx of the second region Gb of the plate glass G. Is preferred. The surface of the rolling element 4 is formed of an elastic body such as rubber, silicon, or resin. Specifically, the surface of the rolling element 3 is preferably natural rubber having a hardness of 40 ° to 70 °, for example.

  As shown in FIG. 2, the scribe line S is a position excluding the upper end portion (including the upper end edge Gu) and the lower end portion (including the lower end edge Gd) of the plate glass G facing in the vertical direction (longitudinal direction of the scribe line S). Thus, it is formed on the surface Gx of the second region Gb of the plate glass G. That is, the upper end Su and the lower end Sd of the scribe line S are separated from the upper end edge Gu and the lower end edge Gd of the glass sheet G. The vertical distance between the upper end Su of the scribe line S and the upper edge Gu of the glass sheet G, and the vertical distance D3 between the lower edge Sd of the scribe line S and the lower edge Gd of the glass sheet G are, for example, 10 to 30 mm. It is.

  Moreover, the rolling element 4 contacts the surface Gx of the 2nd area | region Gb of the plate glass G in the position except the upper end part and lower end part of the plate glass G. FIG. That is, the contact portion between the rolling element 4 and the surface Gx of the second region Gb is separated from the upper end edge Gu and the lower end edge Gd of the plate glass G. In this embodiment, the vertical distance between the contact portion of the rolling element 4 at the highest position and the upper edge Gu of the sheet glass G, and the contact portion of the rolling element 4 at the lowest position and the lower end of the sheet glass G. The vertical distance D4 from the edge Gd is, for example, 10 to 50 mm.

  In addition, the magnitude | size of D1, D2, D3, and D4 is not limited to the numerical range illustrated above, It can adjust suitably according to the magnitude | size and thickness of the plate glass G. FIG.

  Furthermore, in this embodiment, the rolling element 4 is the second region of the sheet glass G only within the formation range of the scribe line S excluding the upper end portion (including the upper end Su) and the lower end portion (including the lower end Sd) of the scribe line S. It contacts the surface Gx of Gb. In other words, the size relationship of the vertical dimension L1 of the glass sheet G> the vertical dimension L2 of the scribe line> the vertical dimension L3 of the contact portion between the rolling element 4 and the surface Gx of the second region Gb is established, and When viewed from the direction, among the three regions having these dimensional relationships, both ends of a region having a large vertical dimension do not overlap with both ends of a region having a large vertical dimension. Here, in this embodiment, since the rolling element 4 is divided into a plurality in the vertical direction, the vertical dimension L3 is the vertical dimension L31 of the contact portion between each rolling element 4 and the surface Gx of the second region Gb. , L32, L33 (L3 = L31 + L32 + L33). The vertical dimensions L31, L32, and L33 may be the same or different. In the latter case, for example, the relationship L32> L31 = L33 or the relationship L32 <L31 = L33 may be satisfied.

  In this embodiment, the back surface support member 3 protrudes up and down from the upper end portion and the lower end portion of the plate glass G so as to support the entire vertical region of the back surface Gy of the first region Ga of the plate glass G. That is, the vertical dimension L4 of the back surface support member 3 is longer than the vertical dimension L1 of the plate glass G. In addition, when the back surface support member 3 supports the whole up-down direction whole surface of the back surface Gy of the 1st area | region Ga of the plate glass G, L4 may be equal to L1. Moreover, L4 may be made smaller than L1, and the back surface support member 3 may be made to contact the back surface Gy of the 1st area | region Ga of the plate glass G in the position except the upper end part and lower end part of the plate glass G.

  As shown in FIG. 3, in this embodiment, in order to prevent the second region Gb of the plate glass G from dropping in the vicinity of the first region Ga of the plate glass G after cleaving, the back surface Gy side of the second region Gb is It is supported by the second support device 5. The second support device 5 includes a robot arm 51 and a vacuum cup (suction cup) 52 attached to the tip of the robot arm 51. The robot arm 51 adjusts the position of the vacuum cup 52 so as to retreat to the back surface Gy side of the plate glass G so as not to hinder the pushing operation of the second region Gb of the plate glass G by the rolling element 4. The robot arm 51 also adjusts the angle of the vacuum cup 52 as necessary. The vacuum cup 52 is made of an elastic body such as rubber that can be deformed according to the bending deformation of the plate glass G, and holds the back surface Gy of the second region Gb of the plate glass G by negative pressure adsorption. In addition, if the pushing operation of the rolling element 4 accompanying rolling is not inhibited, the 2nd support apparatus 5 may be comprised so that the plate glass G may be clamped and supported from both front and back sides, for example. The second support device 5 may be omitted.

  Next, the manufacturing method of the plate glass using the plate glass manufacturing apparatus comprised as mentioned above is demonstrated.

  First, in the process on the upstream side of the position shown in FIG. 1, the surface of the plate glass G is pressed by a wheel cutter, laser irradiation, or the like while the upper portion of the plate glass G is supported by the upper support member 23 of the first support device 2. A scribe line S is formed in Gx. The scribe line S is formed in a straight line along the vertical direction of the plate glass G, excluding the upper end portion and the lower end portion of the plate glass G. Here, the thickness of the plate glass G is, for example, 0.7 mm or less, preferably 0.2 mm to 0.5 mm, and more preferably 0.2 mm to 0.3 mm.

  Next, the moving body 22 was moved along the rail member 21, and the plate glass G was conveyed, with the upper part of the plate glass G in which the scribe line S was formed supported by the upper support member 23 of the first support device 2. Then, it stops at the position shown in FIG. When the plate glass G stops, as shown in FIG. 3, the back surface support member 3 approaches and comes into contact with the back surface Gy side of the first region Ga of the plate glass G, and the rolling elements 4 are on the surface Gx side of the second region Gb. Contact closely. Furthermore, in this embodiment, the back surface Gy side of the second region Gb is adsorbed by a vacuum cup 52 attached to the tip of the robot arm 51 of the second support device 5.

  In this state, as shown in FIGS. 4A to 4C, the rolling element 4 pushes the surface Gx of the second region Gb of the glass sheet G toward the back surface Gy.

  Specifically, first, as shown in FIG. 4A, the rolling element 4 comes into contact with the surface Gx of the second region Gb of the plate glass G. At this time, the rolling element 4 and the surface Gx of the 2nd area | region Gb of the plate glass G contact at the point P1. For convenience of explanation, the state of the plate glass G in FIG. 4A is referred to as an initial state.

  Next, as illustrated in FIG. 4B, the rolling element 4 moves straight in the X direction (plate thickness direction) perpendicular to the surface Gx of the second region Gb of the glass sheet G in the initial state. Thereby, the 2nd area | region Gb of the plate glass G bends from the back surface supporting member 3 as a starting point. In this process, the rolling element 4 moving in the X direction rolls along the surface Gx of the second region Gb due to friction generated between the rolling element 4 and the glass sheet G, and the relative position with respect to the glass sheet G is set to the outside in the width direction (scribe line). (Y direction away from S). Accordingly, the contact position between the glass sheet G and the rolling element 4 continuously changes between the point P1 and the point P2 from the point P1 to the point P2, for example. Therefore, even if bending occurs in the plate glass G (second region Gb), the rolling element 4 sequentially changes the contact position with the plate glass G while rolling and follows the bending deformation of the plate glass G. Therefore, the contact state between the rolling element 4 and the glass sheet G is stabilized, and unjustified slippage is unlikely to occur between the rolling element 4 and the glass sheet G. Therefore, even when the glass plate G is bent, the bending stress sufficiently acts on the scribe line S formed in the vicinity of the back surface supporting member 3.

  Then, as shown in FIG. 4C, when the rolling element 4 is further moved in the X direction from the state of FIG. 4B, the rolling element 4 relative to the plate glass G is accompanied by the rolling of the rolling element 4. The actual contact position further moves outward in the width direction (Y direction) and, for example, continuously changes from the point P2 to the point P3 between the points P2 and P3. By such an operation of the rolling element 4, the bending stress acting on the scribe line S is further increased, and the plate glass G can be reliably cut along the scribe line S.

  In this embodiment, the rolling element 4 moves straight at a constant speed in the X direction, but may move straight while changing the speed in the X direction.

  Further, instead of moving the rolling element 4 straight in the X direction perpendicular to the surface Gx of the glass sheet G in the initial state, the rolling element 4 may be moved straight in an oblique direction that forms an angle with the X direction. In this case, you may move the rolling element 4 diagonally so that it may transfer to the width direction outward side as it goes to the back surface Gy side of the plate glass G, or the width direction inner side as it goes to the back surface Gy side of the plate glass G You may move it diagonally so that it may shift to. In the former case, the rolling element 4 rolls outward in the width direction along the surface Gx of the second region Gb due to friction generated between the rolling element 4 and the glass sheet G. In the latter case, the rolling element 4 rolls inward in the width direction along the surface Gx of the second region Gb due to friction generated between the rolling element 4 and the glass sheet G.

  In this embodiment, when the rolling element 4 is pushed in as described above, the scribe line S and the rolling element 4 are separated from the upper edge Gu and the lower edge Gd of the sheet glass G as shown in FIG. Unfair cracking starting from the upper edge Gu and the lower edge Gd can be prevented.

  Further, in this embodiment, when the rolling element 4 is pushed in as described above, the scribe line S is formed at a position away from the upper edge Gu and the lower edge Gd of the glass sheet G as shown in FIG. The rolling element 4 is in the second region Gb of the glass sheet G only within the formation range of the scribe line S excluding the upper end and lower end of the scribe line S (in the region below the upper end Su and above the lower end Sd). The front surface Gx is pushed into the back surface Gy side. By pushing the rolling element 4 in such a manner, the bending stress acting on the scribe line S becomes more appropriate, and accurate cleaving along the scribe line S can be realized more reliably. In addition, when cleaved in such a mode, after the central region of the scribe line S is cleaved first, the cleaved region develops in the vertical direction, and the upper and lower sides of the plate glass G along the scribe line S. The entire direction is considered to be cleaved.

  Here, as shown in FIG. 4C, after the plate glass G is cut, the second region Gb of the plate glass G does not fall and maintains the state of being sucked and supported by the vacuum cup 52 of the robot arm 51. . The second region Gb separated from the first region Ga of the plate glass G is dropped and collected after the suction of the vacuum cup 52 is released, for example, at a position where the first region Ga of the plate glass G is not affected.

  When the plate glass G is cleaved as described above, the first region Ga of the plate glass G supported by the upper support member 23 is subjected to subsequent manufacturing-related processing (end face processing such as trimming and chamfering, cleaning, film formation, etc. ), The sheet is conveyed from the position shown in FIG. 1 to the downstream process by the movement of the moving body 22 along the rail member 21.

  As mentioned above, although the manufacturing apparatus and the manufacturing method of the plate glass which concern on embodiment of this invention were demonstrated, embodiment of this invention is not necessarily limited to this, In the range which does not deviate from the summary of this invention, various changes are carried out. It is possible to apply.

  In said embodiment, the manufacturing apparatus (or manufacturing method) of plate glass may further be equipped with the shaping | molding apparatus (or shaping | molding process) which shape | molds plate glass from molten glass in the upstream of the cleaving apparatus 1. FIG. The forming apparatus forms the glass sheet G by an overflow downdraw method, a float method, or the like. However, as in the above-described embodiment, when the glass sheet G is suspended and supported and conveyed and cut in a vertical posture, the glass sheet G is preferably formed by the overflow down draw method. This is because, in the overflow downdraw method, the plate glass G is formed in a vertical posture, so that a large posture change of the plate glass G is not necessary when the plate glass G is conveyed and cleaved. In this case, the manufacturing apparatus (or manufacturing method) is a cutting apparatus (or cutting) that cuts a long glass ribbon in the width direction for every predetermined length (bending stress cleaving, laser cleaving, etc.) upstream of the cleaving apparatus 1. Step) may be further provided.

  In said embodiment, the attitude | position of the plate glass G may be a horizontal attitude | position (preferably horizontal attitude | position). In this case, it is preferable to push the upper surface of the plate glass G into the lower surface side (downward) by the rolling elements 4 with the lower surface of the plate glass G supported by the back surface support member 3. If it does in this way, even if the 2nd area | region Gb of the plate glass G is dropped at the position after cleaving the plate glass G, the situation which contacts the 1st area | region Ga of the plate glass G does not arise easily. Note that the second support device 5 that supports the second region Gb may be omitted. Further, the lower surface of the plate glass G may be pushed into the upper surface side (upward) by the rolling element 4 while the upper surface of the plate glass G is supported by the back surface support member 3. The posture of the plate glass G may be an inclined posture inclined with respect to a vertical plane or a horizontal plane.

DESCRIPTION OF SYMBOLS 1 Cleaving device 2 1st support device 21 Rail member 22 Moving body 23 Upper support member 3 Back surface support member 4 Rolling body 4a Rotating shaft 5 Second support device 51 Robot arm 52 Vacuum cup G Sheet glass Ga First area | region Gb of plate glass 2nd area S scribe line

Claims (9)

In the manufacturing method of plate glass including a cleaving step of forming a scribe line on the surface side of the boundary portion between the first region and the second region of the plate glass and cleaving the plate glass along the scribe line,
In the cleaving step, in a state where the back surface of the first region is supported by a back surface support member, while rolling the rolling element along the surface of the second region, the second region is moved to the back surface side by the rolling element. A plate glass manufacturing method characterized by cleaving the plate glass along the scribe line by pressing.   2. The method for producing a plate glass according to claim 1, wherein in the cleaving step, the plate glass is supported by being suspended so that the scribe line is directed in a vertical direction.   The said rolling element contacts the surface of the said 2nd area | region in the position except the both ends of the said glass plate which opposes in the longitudinal direction of the said scribe line, The manufacturing of the plate glass of Claim 1 or 2 characterized by the above-mentioned. Method.   The said scribe line is formed in the position except the both ends of the said plate glass which opposes in the longitudinal direction of the said scribe line, The manufacturing method of the plate glass of any one of Claims 1-3 characterized by the above-mentioned.   The scribe line is formed at a position excluding both end portions of the plate glass opposed in the longitudinal direction of the scribe line, and the rolling element is only within a formation range of the scribe line excluding both end portions of the scribe line. The manufacturing method of the plate glass of Claim 3 which contacts the surface of the said 2nd area | region.   The said rolling element is a cylindrical roller which has a rotating shaft along the longitudinal direction of the said scribe line, The manufacturing method of the plate glass of any one of Claims 1-5 characterized by the above-mentioned.   The said roller is divided | segmented into plurality in the longitudinal direction of the said scribe line, The manufacturing method of the plate glass of Claim 6 characterized by the above-mentioned.   The thickness of the said plate glass is 0.3 mm or less, The manufacturing method of the plate glass of any one of Claims 1-7 characterized by the above-mentioned. In the manufacturing apparatus of the plate glass provided with the cleaving apparatus which cleaves the plate glass in which the scribe line was formed in the surface side of the boundary part of the 1st field and the 2nd field along the scribe line,
The cleaving device rolls along the surface of the second region in order to cleave the plate glass along the scribe line with a back surface supporting member that supports the back surface side of the first region, and the second device. An apparatus for producing plate glass, comprising: a rolling element that pushes the region into the back side.

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