WO2022130750A1

WO2022130750A1 - Plate glass production method and splitting device

Info

Publication number: WO2022130750A1
Application number: PCT/JP2021/037438
Authority: WO
Inventors: 力岸田
Original assignee: 日本電気硝子株式会社
Priority date: 2020-12-18
Filing date: 2021-10-08
Publication date: 2022-06-23
Also published as: CN116583388A; JP2022097132A; KR20230122051A

Abstract

This plate glass production method is for a plate glass G in a vertical attitude, the plate glass G comprising a first region G1 and a second region G2 arranged to be adjacent in the width direction, and a scribe line S formed in the boundary portion of the regions G1, G2, on the side of the respective front surfaces Ga, Gx thereof, the method comprising a splitting step for applying, on the second region G2, a force directed toward the side of a back surface Gy by way of an external force application unit 4 in a state wherein a region of the first region G1 along the scribe line S is in contact with and supported by a supporting unit 3, thereby splitting the plate glass G along the scribe line S. As a pre-step to the splitting step, the mehod comprises an adjustment step for adjusting in the width direction at least one among the position at which the support unit 3 comes into contact with the first region G1, and the position at which the external force application unit 4 comes into contact with the second region G2.

Description

Flat glass manufacturing method and cutting device

The present invention relates to an improvement in a plate glass manufacturing technique including a technique for cutting a plate glass along a scribe line.

Plate glass is used in various fields, as represented by glass substrates for displays such as liquid crystal displays, plasma displays, and organic EL displays, and cover glasses for organic EL lighting. When producing this type of flat glass, a step of sequentially cutting out flat glass of a predetermined length from a glass ribbon, a step of removing unnecessary regions along the sides of the flat glass, and the like are executed. In these steps, a desired flat glass can be obtained by forming scribe lines on a glass ribbon or flat glass and then cutting them along the scribe lines.

Specific examples of the method for obtaining flat glass by cutting include the method disclosed in Patent Document 1. In the method disclosed in the same document, a scribe line is formed on the front surface side of the boundary portion between the first region and the second region arranged adjacent to each other in the width direction of the plate glass, and the first region is supported from the back surface side (support portion). The second region is pushed toward the back surface side by the external force applying portion (rolling body) in a state of being contact-supported by the back surface support member). As a result, the flat glass is cut along the scribe line. The cutting at this time is performed by supporting the flat glass in a vertical posture.

JP-A-2017-226549

As disclosed in Patent Document 1, if the flat glass is supported in a vertical posture, warpage in the vertical direction may occur. The occurrence of this warp becomes remarkable with the recent thinning of flat glass (for example, flat glass used for displays and the like). In the method disclosed in Patent Document 1, when this kind of flat glass is cut, an appropriate bending stress is not applied to the region where the scribe wire is formed, and chipping, cracking, etc. are likely to occur.

An object of the present invention is to suppress the occurrence of chipping, cracking, etc. by allowing an appropriate bending stress to act on a region where a scribe line is formed when cutting a plate glass in a vertical posture.

(1) In the present invention devised to solve the above problems, the first region and the second region are arranged adjacent to each other in the width direction, and a scribing line is provided on the surface side of the boundary portion between the regions. With respect to the formed vertical glass plate, the plate glass is formed by applying a force toward the back surface side to the second region by the external force applying portion in a state where the end portion on the scrib line side of the first region is contact-supported by the support portion. A method for manufacturing a plate glass including a cutting step of cutting along a scribing line, in which a position where the support portion contacts the first region and a position where the external force applying portion contacts the second region as a pre-step of the cutting step. It is characterized by comprising an adjustment step of adjusting at least one of the above in the width direction.

By doing so, in the adjustment step which is the pre-process of the cutting step, the contact position of the support portion with respect to the first region and the contact position of the external force applying portion with respect to the second region can be adjusted in the width direction. Therefore, in the cutting step, each contact position can be set to an optimum position according to the warp of the flat glass. As a result, when the flat glass is cut, an appropriate bending stress can be applied to the region where the scribe wire is formed, so that the occurrence of chipping, cracking, etc. is suppressed.

(2) In the configuration of (1) above, the support portion contacts and supports the back surface of the first region at a position facing the back surface support member and the back surface support member. A member is provided, and in the cutting step, the first region is sandwiched from both sides of the front and back surfaces by the back surface support member and the front surface support member, and in the adjustment step, the position where the back surface support member and the front surface support member come into contact with the first region. , And at least one of the positions where the external force applying portion contacts the second region may be adjusted in the width direction.

By doing so, the contact position of the back surface support member and the front surface support member with respect to the first region and the contact position of the external force applying portion with respect to the second region can be adjusted in the width direction in the adjustment step. Appropriate bending stress can be applied to the formation region of. Further, in the cutting step, since the first region is sandwiched from both sides of the front and back surfaces by the back surface support member and the front surface support member, it is possible to suppress shaking and reduce warpage when the flat glass is cut.

(3) In the configuration of (1) or (2) above, the external force applying portion is at a position facing the pushing member and the pushing member that pushes the second region to the back surface side in a state of being in contact with the front surface of the second region. It is equipped with a suction mechanism that sucks and holds the back surface of the second region while following the operation of the pushing member. , At least one of the position where the support portion contacts the first region and the position where the pushing member and the suction mechanism contact the second region may be adjusted in the width direction. Here, when the configuration is applied to the configuration of (2) above, in the adjustment step, the position where the back surface support member and the surface support member come into contact with the first region, and the pushing member and the suction mechanism are second. At least one of the positions in contact with the region will be adjusted in the width direction.

By doing so, in the adjusting step, the contact position of the support portion with respect to the first region and the contact position of the pushing member and the suction mechanism with respect to the second region can be adjusted in the width direction. Appropriate bending stress can be applied to. Further, in the cutting step, since the second region is sandwiched from both sides of the front and back surfaces by the pushing member and the suction mechanism, it is easy to apply a force toward the back surface side to the second region, and the warp of the flat glass can be reduced. Further, after cutting, the second region can be recovered while being adsorbed and held by the adsorption mechanism.

(4) In any of the above configurations (1) to (3), the support portion and the external force applying portion are arranged in a single moving mechanism that can move in the width direction. By moving the support portion in the width direction, both the position where the support portion contacts the first region and the position where the external force applying portion contacts the second region may be adjusted in the width direction.

By doing so, both the contact position of the support portion with respect to the first region and the contact position of the external force applying portion with respect to the second region can be adjusted in the width direction by simply moving a single moving mechanism.

(5) In the configuration of (4) above, it is preferable that the operation unit for operating the movement of the moving mechanism in the width direction is arranged outside the cutting chamber for performing the cutting step.

In the adjustment process, when an operator enters the cutting room and performs the adjustment work, it is necessary to temporarily stop the supply of flat glass to the cutting room during the adjustment work from the viewpoint of safety. However, with the above configuration, since the operator can perform the adjustment work from outside the cutting room, it is not necessary to stop the supply of the flat glass to the cutting room even during the adjustment work. Therefore, since the plate glass cutting process can be restarted immediately after the adjustment work is completed, the plate glass manufacturing efficiency is improved.

(6) In any of the above configurations (1) to (3), the support portion is arranged in the first moving mechanism that can move in the width direction, and the external force applying portion can move in the width direction. It is arranged in the second moving mechanism, and in the adjustment step, by moving at least one of the first moving mechanism and the second moving mechanism in the width direction, the position where the support portion comes into contact with the first region and the external force are applied. At least one of the positions where the portion contacts the second region may be adjusted in the width direction.

By doing so, the contact position of the support portion with respect to the first region can be adjusted in the width direction by moving the first moving mechanism, and the external force applying portion to the second region can be adjusted by moving the second moving mechanism. The contact position of can be adjusted in the width direction. Further, since the widthwise distance between the support portion and the external force applying portion can be adjusted by the first movement mechanism and the second movement mechanism, more precise adjustment is possible.

(7) In the configuration of (6) above, each of the first operation unit that operates the movement in the width direction of the first movement mechanism and the second operation unit that operates the movement in the width direction of the second movement mechanism is divided. It is preferably located outside the cutting chamber for performing the process.

By doing so, the worker can perform the adjustment work from outside the cutting room, so that it is not necessary to stop the supply of the flat glass to the cutting room even during the adjustment work. Therefore, since the plate glass cutting process can be restarted immediately after the adjustment work is completed, the plate glass manufacturing efficiency is improved.

(8) In any of the above configurations (1) to (7), as a post-process of the cutting step, an inspection step of inspecting at least one of the divided first region and the second region as an inspection target is provided. When an abnormality is detected in the inspection target in the inspection step, it is preferable to perform the adjustment step.

By doing so, the presence or absence of abnormalities in the inspection target is directly inspected in the inspection process, and the adjustment process is performed based on the result, so that the adjustment process can be reliably performed at the required time.

(9) In the present invention devised to solve the above problems, the first region and the second region are arranged adjacent to each other in the width direction, and a scribe line is provided on the surface side of the boundary portion between the regions. With respect to the formed vertical plate glass, the region along the scribe line of the first region is contact-supported by the support portion, and the external force applying portion applies a force toward the back surface side to the second region to apply the plate glass. It is a plate glass cutting device that cuts along a scribe line, and is characterized in that a support portion and an external force applying portion are arranged in a single moving mechanism that can move in the width direction.

By doing so, it is possible to enjoy the same action and effect as the corresponding configuration described above.

(10) In the present invention devised to solve the above problems, the first region and the second region are arranged adjacent to each other in the width direction, and a scribe line is provided on the surface side of the boundary portion between the regions. With respect to the formed vertical glass plate, the plate glass is formed by applying a force toward the back surface side to the second region by the external force applying portion in a state where the end portion on the scribe line side of the first region is contact-supported by the support portion. A flat glass breaking device that cuts along a scribe line, the support part is arranged in the first moving mechanism that can move in the width direction, and the external force applying part is independent of the first moving mechanism in the width direction. It is characterized in that it is arranged in a movable second moving mechanism.

According to the present invention, it is possible to suppress the occurrence of chipping, cracking, etc. by allowing an appropriate bending stress to act on the formation region of the scribe line when cutting the flat glass in the vertical posture.

It is a perspective view which shows the cutting apparatus included in the plate glass manufacturing apparatus which concerns on 1st Embodiment of this invention. It is a schematic bottom view which shows the cutting process included in the plate glass manufacturing apparatus which concerns on 1st Embodiment of this invention. It is a schematic bottom view which shows the cutting process included in the plate glass manufacturing apparatus which concerns on 1st Embodiment of this invention. It is a schematic bottom view which shows the cutting process included in the plate glass manufacturing apparatus which concerns on 1st Embodiment of this invention. FIG. 3 is a schematic plan view showing an adjusting device included in the cutting device shown in FIG. 1. It is a schematic bottom view which shows the cutting process included in the manufacturing method of the flat glass which concerns on the 2nd Embodiment of this invention. It is a schematic plan view which shows the adjustment apparatus provided in the cutting apparatus included in the plate glass manufacturing apparatus which concerns on 3rd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. By assigning the same reference numerals to the corresponding components in each embodiment, duplicate description may be omitted. When only a part of the configuration is described in each embodiment, the configuration of the other embodiment described above can be applied to the other parts of the configuration. Further, not only the combination of the configurations specified in the description of each embodiment but also the configurations of a plurality of embodiments can be partially combined even if the combination is not specified.

(First Embodiment)
FIG. 1 is a perspective view illustrating the cutting device 1 included in the flat glass manufacturing device according to the first embodiment of the present invention. As shown in the figure, the flat glass G has a first region G1 and a second region G2 arranged adjacent to each other in the width direction. In this embodiment, the first region G1 is a region cut out from the plate glass G to be a product, and the plate thickness is uniform over the entire area. The second region G2 is a region cut out from the plate glass G and discarded, and although not shown, the selvage portion having a thicker plate thickness than the first region G1 at the outer end portion in the width direction (left end portion in the figure). including. A scribe line S is formed on the surface Ga and Gx side of the boundary portion between the first region G1 and the second region G2. In the illustrated example, the scribe line S does not reach the upper end and the lower end of the flat glass G. The scribe line S may reach the upper end and the lower end of the flat glass G. In the following description, for convenience, the first region G1 is referred to as an effective region, and the second region G2 is referred to as an unnecessary region.

The flat glass G is suspended and supported in a vertical position so that the scribe line S faces in the vertical direction. The plate thickness of the plate glass G (the plate thickness of the region excluding the selvage portion) is, for example, 200 to 2000 μm, and the upper limit of this plate thickness is preferably 500 μm, more preferably 400 μm. In this embodiment, the flat glass G has flexibility. The plate glass G is warped in the vertical direction. The specific shape of the warp is a shape in which the scribe line S on the surfaces Ga and Gx of the flat glass G and an arbitrary virtual straight line parallel to the scribe line S are curved. Further, the shape of the warp in the vertical direction generated in the plate glass G may change with time due to a change in molding conditions (for example, a change in the plate thickness or the glass composition).

The breaking device 1 cuts (folds) the flat glass G along the scribe line S in order to remove the unnecessary region G2. More specifically, the cutting device 1 has a gripping mechanism 2 that suspends and supports the flat glass G, a support portion 3 that contacts and supports the end of the effective region G1 on the scribe line S side, and an unnecessary region G2 toward the back surface Gy side. It is provided with an external force applying portion 4 for exerting a pushing force.

The gripping mechanism 2 has a pair of gripping pieces 2a and a driving unit 2b that brings the pair of gripping pieces 2a close to and separate from each other. The configuration of the drive unit 2b is not limited to that of the illustrated example. The pair of gripping pieces 2a grip the upper end portion of the effective region G1 by approaching each other, and release the state of gripping the upper end portion of the effective region G1 by separating from each other. The pair of gripping pieces 2a may be configured to be gripped by opening the legs to release the gripped state and closing the legs. Here, the open leg means that the pair of gripping pieces 2a rotates in the direction of opening around the fulcrum (fulcrum), and the closed leg means that the pair of gripping pieces 2a closes around the fulcrum (fulcrum). It is to rotate in the direction.

The gripping mechanism 2 is slidably held on a rail (not shown) extending above the plate glass G along the width direction. The gripping mechanism 2 plays a role of transporting the plate glass G to the cutting position and a role of transporting the effective region G1 to a subsequent process (for example, an inspection process) after the cutting. The gripping mechanism 2 conveys the plate glass G in the width direction along the front surfaces Ga, Gx (or the back surface Gb, Gy) of the effective region G1 and the unnecessary region G2. When the plate glass G is cut at the breaking position, the gripping mechanism 2 is in a stopped state while holding the upper end portion of the effective region G1. In this case, the lower end of the flat glass G is not held. The gripping mechanism 2 grips a plurality of locations in the width direction at the upper end of the effective region G1 (two locations (one location is not shown) in this embodiment).

The support portion 3 includes a back surface support member 5 arranged on the back surface Gb side of the effective region G1 and a surface support member 6 arranged on the front surface Ga side of the effective region G1 so as to face the back surface support member 5. ing.

The back surface support member 5 contacts and supports the effective region G1 from the back surface Gb side when the flat glass G is cut, and is arranged at the end of the effective region G1 on the scribe line S side. The back surface support member 5 contacts and supports a vertically long region (a region along the scribe line S) of the back surface Gb of the effective region G1. The back surface support member 5 moves closer to and away from the back surface Gb of the effective region G1 by the operation of a fluid pressure cylinder such as an air cylinder, a ball screw mechanism, or a drive means 7 (see FIG. 3) such as a robot arm. .. The back surface support member 5 is a columnar body or a plate-like body (surface plate) elongated in the vertical direction. The separation distance in the width direction between the back surface support member 5 and the scribe line S (the separation distance when the back surface support member 5 comes into contact with the effective region G1) is, for example, 10 to 30 mm, preferably 10 to 20 mm. In the illustrated example, the back surface support member 5 extends from the upper end and the lower end of the effective region G1, but may not extend from the upper end and the lower end of the effective region G1. The contact portion of the effective region G1 of the back surface support member 5 with the back surface Gb is preferably made of a material (for example, an elastic member such as rubber or resin) that does not easily scratch the back surface Gb of the effective region G1. ..

The surface support member 6 is contact-supported from the surface Ga side of the effective region G1 when the flat glass G is cut, and is arranged at the end of the effective region G1 on the scribe line S side. The surface support member 6 contact-supports a vertically long region of the surface Ga of the effective region G1. The front surface support member 6 presses the effective region G1 against the back surface support member 5 when the flat glass G is cut. The surface support member 6 moves closer to and away from the surface Ga of the effective region G1 by the operation of a fluid pressure cylinder such as an air cylinder, a ball screw mechanism, or a drive means 8 (see FIG. 3) such as a robot arm. .. In this embodiment, the surface support member 6 is a columnar body or a plate-like body elongated in the vertical direction. The length of the front surface support member 6 in the vertical direction is the same as that described above for the back surface support member 5. Further, the contact portion of the effective region G1 of the surface support member 6 with the surface Ga is preferably formed of a material (for example, an elastic member such as rubber or resin) that does not easily scratch the surface Ga of the effective region G1. ..

The external force applying portion 4 includes a suction mechanism 9 arranged on the back surface Gy side of the unnecessary region G2, and a pushing member 10 arranged on the front surface Gx side of the unnecessary region G2 so as to face the suction mechanism 9. ..

The suction mechanism 9 includes a holding base 9a that is long in the vertical direction and a plurality of (four in the example) suction pads 9b mounted at equal intervals in the longitudinal direction of the holding base 9a. The holding substrate 9a moves closer to and away from the back surface Gy of the unnecessary region G2 by the operation of a fluid pressure cylinder such as an air cylinder, a ball screw mechanism, or a driving means 11 (see FIG. 3) such as a robot arm. Further, the holding substrate 9a moves so as to follow the pushing operation of the pushing member 10 by the operation of the driving means 11. The suction pad 9b sucks and holds the back surface Gy of the unnecessary region G2 by a negative pressure, and is made of an elastic member such as elastic rubber or resin. In the illustrated example, the suction pad 9b is configured to suck and hold the region of the unnecessary region G2 excluding the selvage portion, but may be configured to suck and hold the selvage portion of the unnecessary region G2. However, since the front and back surfaces of the selvage portion are not flat, it is preferable that the suction pad 9b is configured to suck and hold the region of the unnecessary region G2 excluding the selvage portion.

The pushing member 10 has a flat surface portion 10a in contact with the surface Gx of the unnecessary region G2, and in this embodiment, it is a columnar body or a plate-shaped body elongated in the vertical direction. The pushing member 10 moves closer to and away from the surface Gx of the unnecessary region G2 by the operation of a fluid pressure cylinder such as an air cylinder, a ball screw mechanism, or a driving means 12 (see FIG. 3) such as a robot arm. Further, the pushing member 10 is rotated in a direction (for example, in the direction of arrow A) in which a pushing force toward the back surface Gy side is applied to the unnecessary region G2 by the operation of the driving means 12. In the illustrated example, the pushing member 10 extends from the upper end and the lower end of the unnecessary region G2, but may not extend from the upper end and the lower end of the unnecessary region G2. Further, in the illustrated example, the push-in member 10 is configured to come into contact with the selvage portion of the unnecessary region G2, but may be configured to come into contact with the region of the unnecessary region G2 excluding the selvage portion. The contact portion of the pressing member 10 with the surface Gx of the unnecessary region G2 may be formed of a material (for example, an elastic member such as rubber or resin) that does not easily scratch the surface Gx of the unnecessary region G2. Further, when the pushing member 10 is formed into a plate-like body as shown in the figure, the pushing member 10 may have rigidity equal to or higher than that of the plate glass G and have flexibility. preferable. As a result, even when a part of the pushing member 10 comes into contact with the selvage portion of the unnecessary region G2, the pushing member 10 comes into contact with both the selvage portion of the unnecessary region G2 and the other portion, and is appropriate for the unnecessary region G2. The pushing force can be applied. From the viewpoint of imparting flexibility, the pressing member 10 is preferably a porous resin plate or a foamed resin plate typified by plastic corrugated cardboard or paronia.

Next, a method for manufacturing a flat glass using the flat glass manufacturing apparatus configured as described above will be described.

Although not shown, the method for manufacturing the flat glass according to this embodiment includes a molding step of molding a glass ribbon by an overflow downdraw method in a molding furnace, and a slow cooling step of slowly cooling the molded glass ribbon in a slow cooling furnace. It includes a cooling step of cooling the slowly cooled glass ribbon in a cooling unit and a cutting step of cutting the cooled glass ribbon in a cutting chamber. The molding furnace, the slow cooling furnace, the cooling chamber, and the cutting chamber are arranged in this order in the vertical direction. That is, the molding furnace is located at the top and the cutting chamber is located at the bottom. Then, in the molding furnace, the slow cooling furnace, the cooling chamber, and the cutting chamber, the postures of the glass ribbon and the plate glass G are maintained in the vertical posture. A collection chamber for collecting unnecessary glass ribbons and / or flat glass may be provided below the cutting chamber.

In the cutting step, the first cutting step of cutting the glass ribbon at predetermined lengths to obtain the flat glass G and the boundary portion between the effective region G1 and the unnecessary region G2 of the flat glass G are cut by using the above-mentioned cutting device 1. It is equipped with a second cutting process. In the following, the second cutting step having a characteristic configuration will be described in detail.

In the second cutting step (hereinafter, simply referred to as a cutting step), first, in the step on the upstream side of the position shown in FIG. 1, the flat glass G is suspended and supported by the gripping mechanism 2, and then pressed by a wheel cutter or irradiated with a laser. A screen line S is formed on the surface of the flat glass G by the above means. Specifically, the scribe line S is formed on the surfaces Ga and Gx of the boundary portion between the effective region G1 and the unnecessary region G2 of the plate glass G. Next, the plate glass G on which the scribe line S is formed is conveyed in the width direction while being suspended and supported by the gripping mechanism 2, so that the plate glass G reaches the split position shown in FIG. At this point, the front surface support member 6 and the back surface support member 5 are separated from the front surface Ga and the back surface Gb of the effective region G1, respectively, and the pushing member 10 and the suction mechanism 9 are also separated from the front surface Gx and the back surface Gy of the unnecessary region G2, respectively. is seperated. In this state, the plate glass G is warped in the vertical direction.

After that, the back surface support member 5 moves toward the effective region G1, and the front surface support member 6 also moves toward the effective region G1. When the movements of both 5 and 6 are completed, the front surface support member 6 presses the effective region G1 against the back surface support member 5. Under this state, the suction mechanism 9 moves toward the unnecessary region G2, and the pushing member 10 also moves toward the unnecessary region G2. When the movements of both 9 and 10 are completed, the suction pad 9b of the suction mechanism 9 sucks and holds the back surface Gy of the unnecessary region G2, and the pushing member 10 comes into contact with the surface Gx of the unnecessary region G2. In such a moving process, the flat glass G is straightened into a flat shape with almost no warp around each contact portion of the front surface support member 6, the back surface support member 5, the pushing member 10, and the suction mechanism 9. The shape for correcting the warp of the flat glass G is not limited to a flat shape as long as the flat glass G can be accurately cut along the scribe line S. Further, if the shape of the warp of the plate glass G changes, the positions where the front surface support member 6, the back surface support member 5, the pushing member 10 and the suction mechanism 9 come into contact with the effective region G1 and the unnecessary region G2 are adjusted in the width direction of the plate glass G. There is a need to. This is because an appropriate bending stress is applied to the formed region of the scribe line S to suppress chipping and cracking of the plate glass G at the time of breaking. The details of this adjustment process will be described later.

2A, 2B, and 2C show a procedure for cutting the plate glass G after that, and each of these figures crosses the main part of the cutting device 1 and the main part of the plate glass G as viewed from below. It is a bottom view. FIG. 2A shows an aspect in the initial stage of the cutting process. From this state, as shown in FIG. 2B, by rotating the suction mechanism 9 and the pushing member 10 in the direction of the arrow A, the pushing member 10 exerts a pushing force toward the back surface Gy side on the unnecessary region G2. .. As a result, the unnecessary region G2 is bent toward the back surface Gy side with the back surface support member 5 as a fulcrum. The suction mechanism 9 does not substantially exert a pulling force toward the back surface Gy side of the unnecessary region G2. In this process, bending stress acts on the formation region of the scribe line S. After that, when the bending stress acting on the forming region of the scribe line S becomes sufficiently large with the further rotation of the suction mechanism 9 and the pushing member 10, the flat glass G becomes the scribe line S as shown in FIG. 2C. It is cut along. After the splitting, the unnecessary region G2 is transported to the retracted position in a state of being sucked and held by the suction pad 9b, and then the suction state by the suction pad 9b is released and is dropped and collected. On the other hand, the effective region G1 is conveyed to the inspection process by the gripping mechanism 2, and chipping, cracking, defects (adhesion amount of glass powder P) and the like on the cut surface of the effective region G1 are inspected.

In this embodiment, the tip of the drive means 8 of the front surface support member 6 and the tip of the drive means 7 of the back surface support member 5 so as to project toward the scribe line S side on the surface on the scribe line S side, respectively. A pair of thin plate-shaped lip sheets 13 that are fixed and whose tip end abuts on the front surface Gx and the back surface Gy of the unnecessary region G2 are provided (not shown in FIG. 1). The lip sheet 13 does not have an essential configuration and can be omitted as appropriate.

Both lip sheets 13 have a long rectangular shape in the vertical direction and are made of a flexible material such as resin or rubber. The base end portions of both lip sheets 13 are fixed to the tip portions of the driving means 7 and 8 at positions separated from the front surface Ga, Gx and the back surface Gb, Gy of the unnecessary region G2 and the effective region G1, respectively. At the center of the width direction, it is curved so as to be recessed in the direction in which they approach each other.

The space surrounded by the front surface support member 6, the back surface support member 5, and the pair of lip sheets 13 is a gas flow space V, and the scribe line S exists in this space V. Further, one end (for example, the lower end) in the vertical direction of both lip sheets 13 is a suction port of the gas flow space V, and a suction hose (not shown) guided from the suction source is communicated and connected to this suction port. Further, the other end (for example, the upper end) in the vertical direction of both lip sheets 13 is regarded as the inlet of the gas flow space V, and the air passing through the filter is guided to this inlet.

Then, in the cutting step, the gas flows in from the inflow port of the gas flow space V to form a gas flow from the inflow port to the suction port in the gas flow space V. As a result, as shown in FIG. 2C, the glass powder (chips) P generated during cutting is drawn into the suction hose from the suction port by riding on the air flow in the gas flow space V, and is collected at a predetermined storage location. To. As a result, the adhesion of the glass powder P to the effective region G1 can be suppressed.

As shown in FIG. 3, the splitting device 1 adjusts the contact positions of the front surface support member 6 and the back surface support member 5 with respect to the effective region G1 and the contact positions of the push member 10 and the suction mechanism 9 with respect to the unnecessary region G2 in the width direction. The adjusting device 21 is provided.

The adjusting device 21 operates with a single moving mechanism 22 in which the front surface supporting member 6 and the back surface supporting member 5, the pushing member 10 and the suction mechanism 9 are arranged, and an operation unit 23 for operating the movement of the moving mechanism 22. It is provided with a power transmission unit 24 that transmits the power of the unit 23 to the moving mechanism 22.

The moving mechanism 22 supports a pair of rails 25 extending in the width direction, a moving table 26 that can move in the width direction along the rail 25, and a back surface support member 5 and a suction mechanism 9 fixed on the moving table 26. The back surface side substrate 27 and the front surface side substrate 28 fixed on the moving table 26 and supporting the surface support member 6 and the pushing member 10 are provided. Specifically, the rail 25 and the moving table 26 are arranged below the plate glass G, and the moving table 26 is arranged so as to straddle both the front and back surfaces of the plate glass G. The back surface side substrate 27 is fixed to the regions on the back surface Gb and Gy side of the plate glass G of the moving table 26, and the front surface side substrate 28 is fixed to the regions on the front surface Ga and Gx side of the plate glass G of the moving table 26. There is. The back surface side substrate 27 supports the back surface support member 5 and the base ends of the driving means 7 and 11 of the suction mechanism 9 at a predetermined height corresponding to the plate glass G. The surface-side substrate 28 supports the base ends of the drive means 8 and 12 of the surface support member 6 and the push-in member 10 at a predetermined height corresponding to the plate glass G.

The operation unit 23 is composed of handles that can rotate on both the forward and reverse sides. The operation unit 23 is arranged outside the cutting chamber R that cuts the flat glass G.

The power transmission unit 24 converts the rotational motion of the operation unit 23 into a straight motion along the width direction (reciprocating motion in the arrow B direction), and in this embodiment, the pair of timing pulleys 29 and 30 and A timing belt 31 spanned between the pair of timing pulleys 29 and 30 and a ball screw mechanism 32 are provided.

One timing pulley 29 is fixed to the operation unit 23 on the outside of the cutting chamber R and can rotate in the same direction (forward rotation or reverse rotation) with the rotation operation of the operation unit 23. When the operation unit 23 is rotated, one timing pulley 29 is rotated, the rotation operation is transmitted by the timing belt 31, and the other timing pulley 30 is also rotated in the same direction as the rotation operation of the operation unit 23.

The ball screw mechanism 32 includes a screw shaft 33 extending in the width direction and a nut 34 fixed to the lower surface of the moving table 26 and meshing with the screw shaft 33. The screw shaft 33 is supported by a bearing 35, and the rotation shaft of the timing pulley 30 is connected to one end of the screw shaft 33. When the timing pulley 30 rotates as described above with the rotation of the operation unit 23, the screw shaft 33 rotates, and the nut 34 moves straight on the screw shaft 33 in the direction of arrow B. As a result, the moving table 26 fixed to the nut 34 moves in the width direction. Specifically, when the operation unit 23 is rotated in the normal direction, the moving table 26 moves to one side in the width direction (for example, the left side in the figure) by the dimension corresponding to the rotation amount, and when the operation unit 23 is reversed, the operation unit 23 is reversed. The moving table 26 moves to the other side in the width direction (for example, the right side in the figure) by the dimension corresponding to the rotation amount.

The configuration of the operation unit 23 and the power transmission unit 24 is not particularly limited as long as the moving table 26 can be moved in the width direction from the outside of the cutting chamber R. The operation unit 23 may be, for example, a servo motor or the like. The power transmission unit 24 may be, for example, a rack and pinion mechanism or the like.

In the method for manufacturing a flat glass according to the first embodiment, as a pre-process of the cutting step, the position where the front surface support member 6 and the back surface support member 5 come into contact with the effective region G1 by the above-mentioned adjusting device 21, and the pushing member 10 and It is provided with an adjustment step of adjusting both the positions where the suction mechanism 9 comes into contact with the unnecessary region G2 in the width direction. In the adjusting step, the front surface support member 6 and the back surface support member 5 are separated from the front surface Ga and the back surface Gb of the effective region G1, respectively, and the pushing member 10 and the suction mechanism 9 are also separated from the front surface Gx and the back surface Gy of the unnecessary region G2, respectively. is seperated. Here, as shown in FIG. 2A, each contact position adjusted in the adjustment step is an initial position where the surface support member 6 first contacts the front surface Ga of the effective region G1, and the back surface support member 5 is the back surface Gb of the effective region G1. It means the initial position where the pushing member 10 first contacts the front surface Gx of the unnecessary region G2, and the initial position where the suction mechanism 9 first contacts the back surface Gy of the unnecessary region G2.

In the adjustment process, the position of the moving table 26 in the width direction is adjusted by operating the operation unit 23. Since the front surface support member 6, the back surface support member 5, the pushing member 10, and the suction mechanism 9 are arranged on the moving table 26, when the position of the moving table 26 in the width direction is adjusted by the operation unit 23, the effective region G1 is provided. The contact positions of the front surface support member 6 and the back surface support member 5, and the contact positions of the pushing member 10 and the suction mechanism 9 with respect to the unnecessary region G2 are also adjusted in the width direction. Therefore, in the cutting step, the contact positions of the front surface support member 6 and the back surface support member 5 with respect to the effective region G1 and the contact positions of the push member 10 and the suction mechanism 9 with respect to the unnecessary region G2 are optimally set according to the warp of the plate glass G. Can be set to position. As a result, when the plate glass G is cut, an appropriate bending stress can be applied to the formation region of the scribe line S, so that the occurrence of chipping, cracking, etc. can be suppressed. The adjustment width in the width direction of the contact positions of the front surface support member 6 and the back surface support member 5 with respect to the effective region G1 and the contact positions of the push member 10 and the suction mechanism 9 with respect to the unnecessary region G2 is, for example, within 5 mm. To.

Further, since the operation unit 23 is provided on the outside of the cutting chamber R, the operator can perform the adjustment work from the outside of the cutting chamber R in the adjusting step. Therefore, it is not necessary to stop the supply of the flat glass G into the cutting chamber R even during the adjustment work. Therefore, since the cutting process of the flat glass G can be restarted immediately after the adjustment work is completed, the manufacturing efficiency of the flat glass G is improved.

Further, by simply moving the single moving table 26, both the contact positions of the front surface support member 6 and the back surface support member 5 with respect to the effective region G1 and the contact positions of the push member 10 and the suction mechanism 9 with respect to the unnecessary region G2 can be obtained. It can be adjusted in the width direction. That is, the adjustment work can be performed easily and quickly.

The adjustment step may be performed at a predetermined timing determined in advance, but in this embodiment, the adjustment step is performed when an abnormality is detected in the effective region G1 divided by the inspection step. Here, as an abnormality of the effective region G1 in the inspection step, for example, when there is chipping or cracking at the widthwise end portion of the effective region G1, the amount of foreign matter (glass powder P or the like) adhering to the surface of the effective region G1 is Cutting defects such as when the value exceeds a predetermined value can be mentioned. By doing so, the presence or absence of chipping, cracking, or the like is directly inspected in the inspection process, and the adjustment process is performed based on the result, so that the adjustment process can be reliably performed at a required time. The inspection target in the inspection step may be the divided unnecessary region G2.

Here, the adjustment of the contact positions of the front surface support member 6 and the back surface support member 5 with respect to the effective region G1 and the contact positions of the push member 10 and the suction mechanism 9 with respect to the unnecessary region G2 in the width direction is adjusted by the drive means 7, 8, respectively. It can also be done by 11 and 12. Specifically, each of the driving means 7, 8, 11 and 12 can be carried out by moving the back surface supporting member 5, the surface supporting member 6, the suction mechanism 9, and the pushing member 10 in the direction of arrow B. Therefore, in the above adjustment step, the drive means 7, 8, 11, 12 may be used instead of the adjustment device 21, or the adjustment device 21 and the drive means 7, 8, 11, 12 may be used in combination. May be good. However, when the drive means 7, 8, 11, and 12 are used, it is necessary to temporarily stop the supply of the flat glass G to the cutting chamber R because the operator enters the cutting chamber R to perform the adjustment step. Therefore, from the viewpoint of improving the production efficiency of the flat glass G, it is preferable that the adjusting step is performed from the outside of the cutting chamber R by using the adjusting device 21 described above.

(Second embodiment)
In the cutting device 1 and the cutting step according to the first embodiment described above, the unnecessary region G2 at one end in the width direction of the flat glass G has been described, but in the second embodiment, the unnecessary region G2 is the width of the flat glass G. A case where the glass is formed at both ends of the direction will be described. In order to cut the flat glass G to remove the unnecessary region G2, the following configuration is adopted.

That is, as shown in FIG. 4, in this flat glass G, the central region in the width direction is the effective region G1 and both sides in the width direction are unnecessary regions G2. A scribe line S is formed at each of the two boundary portions between the effective region G1 and each unnecessary region G2. The cutting of the flat glass G along the two scribe lines S is performed by the cutting device 1 arranged corresponding to each unnecessary region G2. Both of these two splitting devices 1 are on the front surface support member 6 and the back surface support member 5 arranged on the front surface Ga side and the back surface Gb side of the effective region G1, respectively, and on the front surface Gx side and the back surface Gy side of the unnecessary region G2. It has a pushing member 10 and a suction mechanism 9 arranged respectively. Both the pushing member 10 and the suction mechanism 9 are configured to rotate in the direction of arrow A. The detailed configuration of the two breaking devices 1 is the same as that of the above-mentioned breaking device 1. In this case, the cutting by the two cutting devices 1 may be performed at the same time, or the cutting by the other cutting device 1 may be performed after the cutting by the one cutting device 1 is completed. When arranging the two cutting devices 1 in this way, the adjusting device 21 is also provided in each cutting device 1, and the adjusting step is performed for each cutting device 1.

Separately from this, one cutting device 1 and the other cutting device 1 are arranged at a distance longer than the length in the width direction of the flat glass G, and one unnecessary region G2 is provided by the one cutting device 1. After cutting and removing, the plate glass G may be moved in the width direction, and then the other unnecessary region G2 may be cut and removed by the other cutting device 1.

Further, separately from this, one unnecessary region G2 is divided and removed by the dividing device 1 as one, and then the flat glass G is rotated 180 degrees in a plan view, and then the other. The unnecessary area G2 may be divided and removed by the dividing device 1. When arranging one cutting device 1 in this way, the adjusting device 21 is also provided only in one cutting device 1, and the adjusting step is performed on the cutting device 1.

(Third embodiment)
As shown in FIG. 5, the difference between the plate glass manufacturing apparatus and the manufacturing method according to the third embodiment from the first and second embodiments is the configuration of the adjusting device.

As shown in the figure, in this embodiment, the adjusting device 41 has a first moving mechanism 42 in which the front surface supporting member 6 and the back surface supporting member 5 are arranged, and a second moving mechanism 42 in which the pushing member 10 and the suction mechanism 9 are arranged. The power of the movement mechanism 43, the first operation unit 44 that operates the movement of the first movement mechanism 42, the second operation unit 45 that operates the movement of the second movement mechanism 43, and the first operation unit 44 is first moved. It includes a first power transmission unit 46 that transmits power to the mechanism 42, and a second power transmission unit 47 that transmits the power of the second operation unit 45 to the second movement mechanism 43. That is, in the adjusting device 21 of the first embodiment, the configuration for adjusting the positions of the front surface supporting member 6 and the back surface supporting member 5 in the width direction and the configuration for adjusting the positions of the pushing member 10 and the suction mechanism 9 in the width direction are different. However, in the adjusting device 41 of the second embodiment, these two configurations are independent of each other.

The first moving mechanism 42 is fixed on a pair of first rails 48 extending in the width direction, a first moving table 49 movable in the width direction along the first rail 48, and the first moving table 49. It includes a first back surface side substrate 50 that supports the back surface support member 5, and a first front surface side substrate 51 that is fixed on the first moving table 49 and supports the surface support member 6. Specifically, the first rail 48 and the first moving table 49 are arranged below the plate glass G, and the first moving table 49 is arranged so as to straddle both the front and back sides of the plate glass G. The first back surface side substrate 50 is fixed to the regions on the back surface Gb and Gy side of the plate glass G of the first moving table 49, and the first front surface side substrate 51 is the surface Ga of the plate glass G of the first moving table 49. It is fixed in the area on the Gx side. The first back surface side substrate 50 supports the base end portion of the drive means 7 of the back surface support member 5 at a predetermined height corresponding to the plate glass G. The first surface-side substrate 51 supports the base end portion of the driving means 8 of the surface support member 6 at a predetermined height corresponding to the plate glass G.

The second moving mechanism 43 is fixed on a pair of second rails 52 extending in the width direction, a second moving table 53 that can move in the width direction along the second rail 52, and the second moving table 53. It includes a second back surface side substrate 54 that supports the suction mechanism 9, and a second front surface side substrate 55 that is fixed on the second moving table 53 and supports the pushing member 10. Specifically, the second rail 52 and the second moving table 53 are arranged below the plate glass G, and the second moving table 53 is arranged so as to straddle both the front and back sides of the plate glass G. The second back surface side substrate 54 is fixed to the regions on the back surface Gb and Gy side of the plate glass G of the second moving table 53, and the second front surface side substrate 55 is the surface Ga of the plate glass G of the second moving table 53. It is fixed in the area on the Gx side. The second back surface side substrate 54 supports the base end portion of the driving means 11 of the suction mechanism 9 at a predetermined height corresponding to the plate glass G. The second surface side substrate 55 supports the base end portion of the driving means 12 of the pushing member 10 at a predetermined height corresponding to the plate glass G.

The first operation unit 44 and the second operation unit 45 are composed of handles that can rotate on both the forward and reverse sides. Both

operation units

44 and 45 are arranged outside the cutting chamber R for cutting the flat glass G.

The first power transmission unit 46 converts the rotational motion of the first operation unit 44 into a straight motion along the width direction (reciprocating motion in the arrow C direction), and in this embodiment, a pair of first timings. A first timing belt 58 spanned between the

pulleys

56 and 57, both timing

pulleys

56 and 57, and a first ball screw mechanism 59 having a screw shaft 60 and a nut 61 are provided. The screw shaft 60 extends in the width direction while being supported by the bearing 62, and the nut 61 is fixed to the lower surface of the first moving table 49 and meshed with the screw shaft 60. As a result, similarly to the adjusting device 21 of the first embodiment, the position in the width direction of the first moving table 49 is adjusted according to the rotation direction and the amount of rotation of the first operation unit 44.

The second power transmission unit 47 converts the rotational motion of the second operation unit 45 into a straight motion along the width direction (reciprocating motion in the arrow D direction), and in this embodiment, a pair of second timings. A second timing belt 65 spanned between the

pulleys

63 and 64, both timing

pulleys

63 and 64, and a second ball screw mechanism 66 having a screw shaft 67 and a nut 68 are provided. The screw shaft 67 extends in the width direction while being supported by the bearing 69, and the nut 68 is fixed to the lower surface of the second moving table 53 and meshed with the screw shaft 67. As a result, similarly to the adjusting device 21 of the first embodiment, the position in the width direction of the second moving table 53 is adjusted according to the rotation direction and the amount of rotation of the second operation unit 45.

The configurations of the first and

second operation units

44, 45 and the first and second

power transmission units

46, 47 are such that the first and second moving tables 49, 53 are oriented in the width direction from the outside of the cutting chamber R. The configuration is not particularly limited as long as it can be moved.

In the adjustment step included in the method for manufacturing a flat glass according to the second embodiment, the first moving table 49 of the first moving mechanism 42 is moved in the width direction by the operation of the first operating unit 44, whereby the surface with respect to the effective region G1 is moved. The contact positions of the support member 6 and the back surface support member 5 are adjusted in the width direction. Similarly, by moving the second moving table 53 of the second moving mechanism 43 in the width direction by operating the second operating unit 45, the contact positions of the pushing member 10 and the suction mechanism 9 with respect to the unnecessary region G2 are adjusted in the width direction. do. That is, the contact positions of the front surface support member 6 and the back surface support member 5 with respect to the effective region G1 and the contact positions of the push member 10 and the suction mechanism 9 with respect to the unnecessary region G2 are determined by the first movement mechanism 42 and the second movement mechanism 43. Since it can be adjusted individually in the width direction, more precise adjustment is possible. In the adjustment step, only one of the first moving table 49 and the second moving table 53 may be moved in the width direction.

The present invention is not limited to the configuration of the above embodiment, and is not limited to the above-mentioned action and effect. The present invention can be modified in various ways without departing from the gist of the present invention.

In the above embodiment, the adjustment step may be performed when the molding conditions are changed (for example, the plate thickness or the glass composition is changed).

In the above embodiment, the case where the adjusting

devices

21 and 41 are arranged on the floor surface side of the cutting chamber R has been described, but the adjusting

devices

21 and 41 may be arranged on the ceiling side of the cutting chamber R. That is, the front surface support member 6, the back surface support member 5, the push-in member 10, and the suction mechanism 9 may be suspended and supported from the ceiling via the adjusting

devices

21 and 41.

In the above embodiment, the second region G2 is an unnecessary region having a selvage portion, but the second region G2 may be an unnecessary region having no selvage portion or an effective region (first region) to be a product. It may be an effective region having the same plate thickness as G1).

In the above embodiment, the case where the support portion 3 includes the back surface support member 5 and the front surface support member 6 has been described, but the support portion 3 has only the back surface support member 5 among the back surface support member 5 and the front surface support member 6. It may be provided with.

In the above embodiment, the case where the plate glass G is cut by rotating the external force applying portion 4 (the suction mechanism 9 and the pushing member 10) in the direction of the arrow A has been described, but the external force applying portion 4 is the plate thickness of the plate glass G. The flat glass G may be cut by moving straight in only the direction. In this case, the position of the external force applying portion 4 in the width direction is constant during the cutting.

In the above embodiment, the case where the external force applying unit 4 includes the pushing member 10 and the suction mechanism 9 and causes the pushing force toward the back surface Gy side to act on the second region G2 has been described. Instead of the pushing member 10, a pulling member that exerts a pulling force toward the back surface Gy side may be provided in the second region G2. As an example provided with the pull-in member, the external force applying portion 4 includes only the suction mechanism 9 of the push-in member 10 and the suction mechanism 9, and the suction mechanism 9 causes the second region G2 to exert a pull-in force toward the back surface Gy side. The configuration is mentioned. Instead of this, the external force applying portion 4 moves the holding member to the back surface Gy side while the upper end portion and the lower end portion of the second region G2 are held by holding members such as gripping pieces, respectively. A force toward the back surface Gy side may be applied to the region G2.

In the above embodiment, the upper end portion of the first region G1 is held by the grip piece 2a of the grip mechanism 2, but instead of this, it may be held by another holding member such as a suction cup. good.

In the above embodiment, the case where the flat glass G is obtained from the glass ribbon formed by the overflow downdraw method has been described, but the method for forming the glass ribbon is not limited to this. The method for forming the glass ribbon may be a forming method such as a float method, a rollout method, a slot down draw method, or a redraw method.

In the above embodiment, the case where the flat glass G has a warp has been described, but the cutting device and the method for manufacturing a flat glass of the present invention can also be applied to a flat glass without a warp.

1 Splitting device 2 Gripping mechanism 3 Supporting part 4 External force applying part 5 Backside supporting member 6 Surface supporting member 9 Suction mechanism 10 Pushing member 21 Adjusting device 22 Moving mechanism 23 Operating part 24 Power transmission part 41 Adjusting device 42 First moving mechanism 43 (2) Movement mechanism 44 1st operation unit 45 2nd operation unit 46 1st power transmission unit 47 2nd power transmission unit G Plate glass G1 1st area (effective area)
G2 second area (unnecessary area)
R cutting room S scribe line

Claims

The scribe line side of the first region is a vertical glass plate in which the first region and the second region are arranged adjacent to each other in the width direction and the scribe line is formed on the surface side of the boundary portion of the regions. A plate glass having a cutting step of cutting the plate glass along the scribe line by applying a force toward the back surface side to the second region by an external force applying portion in a state where the end portion of the glass is contact-supported by the support portion. It ’s a manufacturing method,
As a pre-step of the cutting step, an adjusting step of adjusting at least one of a position where the support portion comes into contact with the first region and a position where the external force applying portion comes into contact with the second region is provided in the width direction. A method for manufacturing flat glass.
The support portion includes a back surface support member that contacts and supports the back surface of the first region, and a surface support member that contacts and supports the front surface of the first region at a position facing the back surface support member.
In the cutting step, the first region is sandwiched from both sides of the front and back surfaces by the back surface support member and the front surface support member.
In the adjustment step, at least one of the position where the back surface support member and the surface support member come into contact with the first region and the position where the external force applying portion contacts the second region is adjusted in the width direction. The method for manufacturing a flat glass according to claim 1.
The external force applying portion includes a pushing member that pushes the second region toward the back surface side in contact with the front surface of the second region, and the pushing member at a position facing the pushing member, while following the operation of the pushing member. Equipped with a suction mechanism that sucks and holds the back surface of the two regions
In the cutting step, the second region is sandwiched from both sides of the front and back surfaces by the pushing member and the suction mechanism.
Claim 1 in the adjusting step, at least one of a position where the support portion contacts the first region and a position where the pushing member and the suction mechanism contact the second region is adjusted in the width direction. Or the method for manufacturing a flat glass according to 2.
The support portion and the external force applying portion are arranged in a single moving mechanism that can move in the width direction.
In the adjusting step, by moving the moving mechanism in the width direction, both the position where the support portion comes into contact with the first region and the position where the external force applying portion comes into contact with the second region are said. The method for manufacturing a flat glass according to any one of claims 1 to 3, which is adjusted in the width direction.
The method for manufacturing a flat glass according to claim 4, wherein the operation unit for operating the movement of the moving mechanism in the width direction is arranged outside the cutting chamber for performing the cutting step.
The support portion is arranged in the first moving mechanism that can move in the width direction, and the external force applying portion is arranged in the second moving mechanism that can move in the width direction.
In the adjusting step, by moving at least one of the first moving mechanism and the second moving mechanism in the width direction, the position where the support portion comes into contact with the first region and the external force applying portion are said. The method for manufacturing a flat glass according to any one of claims 1 to 3, wherein at least one of the positions in contact with the second region is adjusted in the width direction.
Each of the first operation unit that operates the movement in the width direction of the first movement mechanism and the second operation unit that operates the movement in the width direction of the second movement mechanism are cutting chambers for performing the cutting step. The method for manufacturing a flat glass according to claim 6, which is arranged outside the above.
As a subsequent step of the cutting step, an inspection step of inspecting at least one of the cut first region and the second region as an inspection target is provided.
The method for manufacturing a flat glass according to any one of claims 1 to 7, wherein when an abnormality is detected in the inspection target in the inspection step, the adjustment step is performed.
The scribe line side of the first region is a vertical glass plate in which the first region and the second region are arranged adjacent to each other in the width direction and the scribe line is formed on the surface side of the boundary portion of the regions. It is a plate glass cutting device that cuts the plate glass along the scribe line by applying a force toward the back surface side to the second region by the external force applying portion in a state where the end portion of the glass is contact-supported by the support portion. hand,
A flat glass breaking device, characterized in that the support portion and the external force applying portion are arranged in a single moving mechanism that can move in the width direction.
A vertical glass plate in which the first region and the second region are arranged adjacent to each other in the width direction and a scribe line is formed on the surface side of the boundary portion of the regions, is attached to the scribe line in the first region. It is a plate glass cutting device that cuts the plate glass along the scribe line by applying a force toward the back surface side to the second region by the external force applying portion in a state where the area along the line is contact-supported by the support portion. hand,
The support portion is arranged in the first moving mechanism that can move in the width direction, and the external force applying portion is arranged in the second moving mechanism that can move in the width direction independently of the first moving mechanism. A flat glass cutting device characterized by being