JPWO2018203516A1 - Method and apparatus for manufacturing sheet glass - Google Patents

Abstract

The method for manufacturing a sheet glass includes a transfer step of transferring the sheet glass G in a predetermined transfer direction. In the transport step, when the plate glass G is moved from the first standby position WP1 to the processing position CP, a part of the transport belt 6 is moved upward by the lifting device 8. Further, in the transporting step, when the end face of the sheet glass G is processed by the end face processing device 3, a part of the transport belt 6 that has been moved upward is moved below the processing position CP by the lifting device 8. After this downward movement, the other end of the sheet glass G is disposed at the first standby position WP1 by running the transport belt 6 while processing the end face of the sheet glass G disposed at the processing position CP by the end face processing device 3. . This makes it possible to efficiently transfer the glass sheet when processing the end face of the glass sheet, shorten the tact time, and improve the manufacturing efficiency.

Description

  The present invention relates to a method and an apparatus for manufacturing a sheet glass.

  When manufacturing a flat glass for a flat panel display (FPD) such as a liquid crystal display (LCD), a plasma display (PDP), and an organic EL display (OLED), a large glass substrate formed by a forming method such as a down-draw method, for example. To form a sheet glass of a predetermined size. Specifically, for example, a glass sheet is formed by cutting a glass substrate using a scribe wheel such as a diamond cutter.

  When the glass substrate is cut to form a sheet glass, minute cracks having a depth of about several μm to 100 μm are formed on the cut surface (end surface). Since the cracks cause a decrease in the mechanical strength of the glass sheet, the cracks are removed by processing the end face of the glass sheet. That is, in order to increase the mechanical strength of the sheet glass, prevent cracking or chipping of the sheet glass, and facilitate handling in a later step, the end face of the sheet glass is subjected to grinding (chamfering) and polishing.

  As disclosed in Patent Document 1, a sheet glass manufacturing apparatus includes a cutting section for cutting a glass substrate along a cutting line (scribe line), a cutting section for cutting the glass substrate along the cutting line, and a cutting section. Some include a grinding unit for grinding an end face of a sheet glass to be formed later and a conveying unit for conveying the sheet glass.

  The transport unit in this manufacturing apparatus includes a plurality of vertically movable suction pads and a transfer device for moving the suction pads in the horizontal direction. The suction pad descends toward the glass substrate placed on the cutting section, and rises after adsorbing the plate glass. Thereafter, the suction pad is moved in the horizontal direction by the transfer device, descends from above the fold, and places the glass substrate on the fold. Similarly, the suction pad sucks the sheet glass formed by the split part and transfers it to the grinding part.

JP 2010-47455 A

  Since the transport unit in the conventional manufacturing apparatus transports the sheet glass by the suction pad and the transfer device, the lifting and lowering operation and the suction operation of the suction pad, and further, the horizontal movement operation of the plate glass by the transfer device reduces the time for transferring the plate glass. It costs. For this reason, the tact time concerning the manufacture of the sheet glass becomes long, and it has not been possible to manufacture the sheet glass efficiently.

  The present invention has been made in view of the above circumstances, and a sheet glass capable of shortening a tact time and improving a manufacturing efficiency by efficiently transferring the sheet glass when performing the end face processing of the sheet glass. It is an object of the present invention to provide a manufacturing method and a manufacturing apparatus.

  The present invention is to solve the above-mentioned problem, and is a method for manufacturing a sheet glass including an end face processing step of processing an end face of a sheet glass by an end face processing apparatus. The end surface processing step includes a transfer step of moving the plate glass to a first standby position by a transfer device and a processing position provided downstream of the first standby position in the transfer direction of the transfer device. The end face processing apparatus includes a surface plate having a support surface on which the glass sheet is placed and a fixing portion for fixing the glass sheet. The transport device is a transport belt that transports the plate glass, a guide member that guides the travel of the transport belt, and an elevating device that moves up and down a part of the transport belt by moving the guide member up and down. Prepare. The upstream end of the guide member is located upstream of the upstream end of the surface plate in the transport direction. The downstream end of the guide member is located downstream of the downstream end of the surface plate in the transport direction. In the transporting step, when the sheet glass is moved from the first standby position to the processing position, a part of the transport belt is moved upward by the lifting device to dispose the sheet glass above the processing position. When the end face of the sheet glass is processed by the end face processing device, the sheet glass disposed above the processing position is disposed at the processing position, and the transport belt is moved from the sheet glass. A lowering step of moving the part of the transport belt, which has been moved upward, to a position lower than the processing position by the elevating device, so as to separate the end face of the plate glass disposed at the processing position; While processing by the device, by moving the transport belt moved below the processing position, the other sheet glass is And a step of placing a first standby position.

  In the above configuration, when the plate glass is moved from the first standby position to the processing position so that the end surface of the plate glass is processed by the end surface processing device, the lifting device moves a part of the transport belt upward (a lifting step). Thereby, the sheet glass is moved above the processing position by the transport belt without contacting a part (for example, a surface plate) of the end face processing apparatus at the processing position. At this time, it is possible to prevent a part of the transport belt from bending, and to stably transport the plate glass. This is because, in the transport direction, the upstream end of the guide member is located upstream from the upstream end of the surface plate, and the downstream end of the guide member is located downstream of the downstream end of the surface plate. Because you do. Further, by moving a part of the raised conveyor belt downward, the glass sheet is placed at the processing position. The conveyor belt is further moved below the processing position by the operation of the elevating device, and is separated from the plate glass at the processing position (a descending step).

  By separating the conveyor belt from the glass sheet, the conveyor belt can travel without contacting the glass sheet. Therefore, a new unprocessed sheet glass (another sheet glass) can be arranged at the first standby position by running the transport belt while the sheet glass is arranged at the processing position. Thereby, it becomes possible to arrange a new sheet glass at the first standby position while processing the end face of the sheet glass by the end face processing device. Therefore, the tact time can be reduced as much as possible, and the production efficiency of the sheet glass can be improved.

  In the method, the transport device is connected to the upstream end of the guide member, and a first auxiliary member that guides the travel of the transport belt, and is connected to the downstream end of the guide member. And a second auxiliary member for guiding the conveyance belt. In this case, in the raising step, the first auxiliary member and the second auxiliary member are tilted in accordance with moving the guide member upward by the lifting device, and in the lowering step, the guide is moved by the lifting device. As the member is moved downward, the first auxiliary member and the second auxiliary member are made horizontal. Accordingly, a part of the transport belt is inclined while being held by the first auxiliary member and the second auxiliary member, so that the bending can be reduced even at the inclined portion of the transport belt, and the sheet glass can be transported more stably in the ascent process.

  In the method, the transfer device may include a first tilting device that tilts the first auxiliary member by raising a part of the first auxiliary member, and the first tilting device that raises a part of the second auxiliary member. A second tilting device for tilting the second auxiliary member. In this case, in the raising step, the first auxiliary member is tilted by the first tilting device, and the second auxiliary member is tilted by the second tilting device, as the guide member is moved upward by the lifting device. Tilt. In the lowering step, the first auxiliary member is made horizontal by the first tilting device and the second auxiliary member is moved by the second tilting device as the guide member is moved downward by the lifting device. Level. Thus, since the transport belt is partially inclined using the first tilt device and the second tilt device in addition to the lifting device, the sheet glass can be transported more stably in the lifting process.

  In the method, it is preferable that the transfer device includes a horizontal maintenance mechanism that mechanically maintains the guide member horizontally in a process of moving the guide member by the lifting device. This ensures that the guide member is kept horizontal, so that the plate glass can be stably moved up and down together with the guide member.

  In this method, the horizontal maintaining mechanism may have a configuration including a first rotating member and a second rotating member that can rotate around an axis orthogonal to the transport direction. In this configuration, the first rotating member and the second rotating member are arranged at intervals in the transport direction, and the guide member is rotatable around an axis orthogonal to the transport direction. Is linked to

  In the method, the transporting step is configured to move the sheet glass on which the end face processing has been completed to a second standby position provided on the downstream side in the transport direction from the processing position by the transport belt, and the second standby In the position, a holding device that holds the plate glass in a state where the plate glass is separated from the transfer belt is provided, and in the transfer step, in a state where the plate glass is disposed in the processing position, the other When arranging the sheet glass at the first standby position, it is preferable to further include a holding step of holding the sheet glass at the second standby position above the second standby position by the holding device.

  According to the above configuration, the sheet glass moved from the first standby position to the processing position can be transported to the second standby position further downstream by the transport belt. The holding device can separate the glass sheet from the transport belt by holding the glass sheet that has reached the second standby position above the second standby position (a holding step). This allows the transport belt to travel without contacting the plate glass. That is, the transport belt passes through the above-described lowering step and the holding step, so that the new unprocessed sheet glass is moved to the first standby position without contacting the sheet glass processed at the processing position and the processed sheet glass. Can be arranged. For this reason, it becomes possible to arrange a new sheet glass at the first standby position while processing the end face of the sheet glass by the end face processing device. Thereby, the tact time can be further reduced, and the production efficiency of the sheet glass can be significantly improved.

  In the method, the transporting step includes moving the glass sheet at the first standby position to the processing position, moving the glass sheet that has been processed at the processing position to the second standby position, It is desirable to simultaneously move the sheet glass at the second standby position to the downstream side. Thereby, the plate glass can be efficiently transported.

  In the method, the end face processing device includes a surface plate having a support surface on which the plate glass is placed and a fixing portion for fixing the plate glass, a positioning device for positioning the plate glass, and a position of an end surface of the plate glass. Wherein the end face processing step includes a step of positioning the glass sheet by the positioning device, a fixing step of fixing the glass sheet to the support surface by the fixing portion, and the glass sheet by the displacement sensor. And a measuring step of measuring the position of the end face of the light emitting element.

  According to the above configuration, by executing the measuring step after the positioning step and the fixing step, the position of the end face of the sheet glass after fixing can be accurately grasped. For this reason, the end face processing apparatus can accurately process the end face based on the position information of the end face obtained by the displacement sensor.

  In the method, it is preferable that the plate glass is formed in a quadrangular shape, and in the measuring step, a position of the end face on two opposite sides of the plate glass is measured by the displacement sensor. According to such a configuration, by measuring the positions of the end faces related to the two sides of the sheet glass, the end face processing device can accurately process these end faces.

  In this method, it is preferable that the platen is configured to be divided into a plurality of constituent members, and that a traveling path of the transport belt is formed between the constituent members. Thus, the transport belt can transport the sheet glass without contacting the platen.

  The present invention has been made to solve the above-described problems, and is a sheet glass manufacturing apparatus including: a transfer device that transfers a sheet glass in a predetermined transfer direction; and an end surface processing device that processes an end surface of the plate glass. The end face processing apparatus includes a surface plate having a support surface on which the glass sheet is placed and a fixing portion for fixing the glass sheet. The transport device is a transport belt that transports the plate glass, a guide member that guides the travel of the transport belt, and an elevating device that moves up and down a part of the transport belt by moving the guide member up and down. Prepare. The upstream end of the guide member is located upstream of the upstream end of the surface plate in the transport direction. The downstream end of the guide member is located downstream of the downstream end of the surface plate in the transport direction. The transport belt is configured to move the sheet glass to a first standby position and a processing position provided downstream of the first standby position in the transport direction. The transfer device, when moving the plate glass from the first standby position to the processing position, moving a part of the transfer belt upward by a lifting device to arrange the plate glass above the processing position When processing the end face of the plate glass by the end face processing device, the plate glass disposed above the processing position is disposed at the processing position, and the support of the plate glass by the transport belt is released. In order to move a part of the transport belt moved upward from the processing position by the elevating device below the processing position, while processing the end face of the plate glass disposed at the processing position by the end face processing apparatus, By moving the conveyor belt moved below the processing position, another sheet glass is arranged at the first standby position. It is made.

  According to the above configuration, when the plate glass is moved from the first standby position to the processing position so that the end surface of the plate glass is processed by the end surface processing device, the lifting device moves a part of the transport belt upward. Thereby, the sheet glass is moved above the processing position by the transport belt without contacting a part (for example, a surface plate) of the end face processing apparatus at the processing position. At this time, it is possible to prevent a part of the transport belt from bending, and to stably transport the plate glass. This is because, in the transport direction, the upstream end of the guide member is located upstream from the upstream end of the surface plate, and the downstream end of the guide member is located downstream of the downstream end of the surface plate. Because you do. Further, from this state, the sheet glass is placed at the processing position by moving a part of the raised conveyor belt downward. The conveyor belt is moved further below the processing position by the operation of the elevating device, and is separated from the plate glass at the processing position.

  By separating the conveyor belt from the glass sheet, the conveyor belt can travel without contacting the glass sheet. Therefore, a new unprocessed sheet glass (another sheet glass) can be arranged at the first standby position by running the transport belt while the sheet glass is arranged at the processing position.

  As described above, the plate glass is directly supported by the transport belt, and the plate glass can be transported efficiently by raising and lowering a part of the transport belt. Thereby, the tact time can be reduced as much as possible, and the production efficiency of the sheet glass can be improved.

  In the present manufacturing apparatus, the transport device is connected to the upstream end of the guide member, a first auxiliary member that guides the travel of the transport belt, and connected to the downstream end of the guide member, Preferably, a second auxiliary member for guiding the traveling of the transport belt is provided. In this case, the transport device inclines the first auxiliary member and the second auxiliary member as the guide device is moved upward by the lifting device, and lowers the guide member by the lifting device. The first auxiliary member and the second auxiliary member are configured to be horizontal with each other. Accordingly, a part of the transport belt is inclined while being held by the first auxiliary member and the second auxiliary member, so that the bending can be reduced even at the inclined portion of the transport belt, and the sheet glass can be transported more stably in the ascent process.

  In the present manufacturing apparatus, it is preferable that the transfer device includes a first tilt device that tilts the first auxiliary member and a second tilt device that tilts the second auxiliary member. In this case, the transport device tilts the first auxiliary member by the first tilting device and moves the second auxiliary member by the second tilting device as the guide member is moved upward by the lifting device. And, along with moving the guide member downward by the elevating device, the first auxiliary member is made horizontal by the first tilting device, and the second auxiliary member is moved by the second tilting device. It is configured to be horizontal. Accordingly, a part of the transport belt is inclined using the first tilting device and the second tilting device in addition to the elevating device, so that the glass sheet can be transported more stably with the transport belt partially raised.

  ADVANTAGE OF THE INVENTION According to this invention, when carrying out edge processing of a sheet glass, it can shorten a takt time and improve manufacturing efficiency by performing conveyance of a sheet glass efficiently.

It is a side view of the end face processing device concerning a 1st embodiment of the present invention. It is a top view of the end face processing device of a 1st embodiment. FIG. 3 is a cross-sectional view of the lifting device in the end face processing device of the first embodiment. It is a longitudinal section of a holding device in an end face processing device of a 1st embodiment. It is a flowchart which shows the manufacturing method of a sheet glass. It is a flowchart which shows an end surface processing process. It is a side view which shows a part of conveyance process in the end surface processing process of a sheet glass. It is a side view which shows a part of conveyance process in the end surface processing process of a sheet glass. It is a side view which shows a part of conveyance process in the end surface processing process of a sheet glass. It is a side view which shows a part of conveyance process in the end surface processing process of a sheet glass. It is a side view which shows a part of conveyance process in the end surface processing process of a sheet glass. It is a side view of the end face processing device concerning a 2nd embodiment of the present invention. It is a side view showing a level maintenance mechanism of a 3rd embodiment of the present invention. It is a side view showing the state where a guide member was raised in a 3rd embodiment.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. 1 to 11 show one embodiment (first embodiment) of a method and an apparatus for manufacturing a sheet glass according to the present invention.

  As shown in FIGS. 1 and 2, the manufacturing apparatus 1 includes a transport device 2 that transports a sheet glass G in a predetermined direction, and an end surface processing device 3 that processes an end surface of the sheet glass G. In addition, the manufacturing device 1 includes a cutting device 4 disposed upstream of the end face processing device 3 and a cleaning device 5 disposed downstream of the end surface processing device 3.

  The transport device 2 transfers the sheet glass G from the cutting device 4 to the edge processing device 3 and from the edge processing device 3 to the cleaning device 5. Specifically, as shown in FIG. 1, in the process of transporting the glass sheet G, the transport device 2 includes a first standby position WP <b> 1, a processing position CP where the processing by the end face processing device 3 is performed, and a downstream side of the processing position CP. The plate glass G is moved to the second standby position WP2 where the plate glass G is made to stand by. Further, the transport device 2 stops the plate glass G at each of the positions WP1, CP, and WP2 in conjunction with a sensor (not shown).

  The transport device 2 includes a plurality of transport belts 6 that transport the glass sheet G, an elevating device 8 that moves a part of the transport belt 6 up and down, and a holding device 12 that holds the glass sheet G at a predetermined position.

  The transport belt 6 is configured to be endless by rubber or another elastic body, and is configured to circulate around when driven by the drive device 7. In the present embodiment, three transport belts 6 are illustrated, but the number of the transport belts 6 is not limited to this, and can be appropriately set according to the size of the plate glass G.

  The driving device 7 has a plurality of pulleys 7a around which the transport belt 6 is wound, and a motor (not shown) for driving the pulleys 7a. The driving device 7 is not limited to the pulley 7a described above, and can drive the transport belt 6 to rotate by a sprocket or other various driving bodies.

  The elevating device 8 moves a guide member 9 for guiding the transport belt 6 in the vertical direction in order to raise and lower a part of the transport belt 6. The elevating device 8 includes two actuators 8a that move the guide member 9 up and down. The number of actuators 8a may be one, or three or more. The actuator 8a is constituted by a cylinder device, but is not limited to this. The actuator 8a changes the position of the guide member 9 between a standby position and a position above the standby position.

  The guide member 9 extends along the transport direction. In the transport direction, the upstream end 9a of the guide member 9 is located upstream of the upstream end of the surface plate 18, and the downstream end 9b of the guide member 9 is located downstream of the downstream end of the surface plate 18. Located in. Further, as shown in FIG. 3, the guide member 9 has a concave portion 9c for supporting the transport belt 6. The guide member 9 can be made of, for example, a synthetic resin.

  The upstream end 9a of the guide member 9 is rotatably connected to the downstream end 10b of the first auxiliary member 10 via a joint (not shown), and the downstream end 9b of the guide member 9 is It is rotatably connected to an upstream end 11a of the second auxiliary member 11 via a not shown. The upstream end 10a of the first auxiliary member 10 and the downstream end 11b of the second auxiliary member 11 are held rotatably and movably in the horizontal direction.

  Thus, when the guide member 9 is at the standby position, the first auxiliary member 10 and the second auxiliary member 11 are both horizontal, and a straight line is formed by the guide member 9, the first auxiliary member 10, and the second auxiliary member 11. Formed (see FIG. 1). When the guide member 9 is changed to a position above the standby position, the first auxiliary member 10 is inclined with the rise of the downstream end 10b of the first auxiliary member 10 (see FIG. 8). Further, as the upstream end 11a of the second auxiliary member 11 rises, the second auxiliary member 11 is inclined. The upstream end 9a of the guide member 9 is connected to the downstream end 10b of the first auxiliary member 10 via a joint (not shown) so as to be rotatable and movable in the horizontal direction. The downstream end 9b may be rotatably and horizontally movable via a joint (not shown) and connected to the upstream end 11a of the second auxiliary member 11. In this case, the upstream end 10a of the first auxiliary member 10 and the downstream end 11b of the second auxiliary member 11 are rotatably held.

  Each of the first auxiliary member 10 and the second auxiliary member 11 has a concave portion like the guide member 9 for supporting the transport belt 6 and guiding the travel of the transport belt 6.

  As shown in FIG. 1, the holding device 12 included in the transport device 2 is disposed so as to correspond to the second standby position WP2 of the sheet glass G. The holding device 12 includes a plurality of holding members 13 that can hold the sheet glass G, and an actuator 14 that moves each holding member 13 up and down.

  The holding member 13 is a hollow rod member made of metal and configured in a long shape. The width of the holding member 13 is set smaller than the interval between the respective conveyor belts 6. Thereby, the holding member 13 can move vertically between the transport belts 6. As shown in FIG. 4, the inside of the holding member 13 is filled with a liquid L such as water. The holding member 13 has a hole 15 for discharging the liquid L to the outside. Note that the holding member 13 is not limited to the above-described configuration, and may have a configuration in which, for example, a pipe through which the liquid L can flow, and the liquid L in the pipe is discharged from the hole 15.

  On the upper surface of the holding member 13, a support portion 16 for supporting the lower surface of the sheet glass G is provided. The support portion 16 is formed in a rectangular shape, and is formed of, for example, an elastic body such as rubber. The material of the support portion 16 is not limited to an elastic body, and may be made of a sponge or other contractible material. The support 16 has a hole 17 communicating with the hole 15 of the holding member 13. The hole 17 functions as a discharge unit that discharges the liquid L filled in the holding member 13 onto the upper surface of the support unit 16.

  The end face processing device 3 is arranged corresponding to the processing position CP of the sheet glass G set by the transfer device 2. In the present embodiment, the end face processing apparatus 3 is exemplified as a grinding apparatus for chamfering the end face of the sheet glass G, but is not limited thereto, and may include a polishing apparatus for polishing the end face of the sheet glass G.

  The end face processing device 3 includes a surface plate 18 on which the glass sheet G is placed, processing tools 19a and 19b, a positioning device 20 for positioning the glass sheet G, and displacement sensors 21a to 21c for measuring the position of the end face of the glass sheet G. And.

  The platen 18 is divided into a plurality of constituent members 18a to 18d. By increasing or decreasing the number of the constituent members 18a to 18d, the size of the platen 18 can be changed according to the size of the plate glass G to be processed.

  As shown in FIG. 2, each of the constituent members 18a to 18d is formed in a long shape and is arranged at a fixed interval. Thereby, a space (running path) 22 through which the transport belt 6 can pass is formed between the respective constituent members 18a to 18d. The upper surface of each of the constituent members 18a to 18d is a support surface 23 that supports the glass sheet G.

  Each of the components 18a to 18d is provided with a fixing portion 24 for fixing the glass sheet G to the support surface 23. The fixing portion 24 is a hole formed in the support surface 23 and is connected to a vacuum pump (not shown). By the action of the vacuum pump, the fixing part 24 sucks the plate glass G placed on the support surface 23.

  The processing tools 19a and 19b are configured by grinding tools such as diamond wheels. As shown in FIG. 2, the processing tools 19a and 19b process the end face of one side G1 so as to process the end faces of the two sides G1 and G2 of the sheet glass G, and the processing tool 19a and 19b of the other side G2. And a processing tool 19b for processing the end face. Each of the processing tools 19a and 19b moves linearly from one end of each side G1 and G2 to the other end while rotating (indicated by a solid line and a two-dot chain line), so that the end face of the plate glass G is the full length. Grinding (chamfering). Note that the linear movement of each of the processing tools 19a and 19b is performed by, for example, a linear motion guide, but is not limited thereto.

  As shown in FIG. 2, the positioning device 20 includes two pressing members 25 a and 25 b that can be brought into contact with the first side G1 of the square plate glass G placed on the support surface 23 of the surface plate 18. Two receiving members 26a and 26b capable of abutting on the second side G2 facing the first side G1 and a third receiving member 26a and 26b forming a right angle with respect to the first side G1 and the second side G2. Has one pressing member 25c that can abut on the side G3, and one receiving member 26c that can abut on the fourth side G4 facing the third side G3.

  In this case, the four sides G1 to G4 of the plate glass G are located outside the outer peripheral edge of the support surface 23 of the platen 18, and the pressing members 25a to 25c and the receiving members 26a to 26c are The outer peripheral edge of the support surface 18 of the sheet glass G is further disposed outside the four sides G1 to G4 of the sheet glass G. Accordingly, the glass sheet G is supported at three points by a total of three receiving members 26a to 26c, and is also supported at three points by a total of three pressing members 25a to 25c.

  The pressing members 25a to 25c and the receiving members 26a to 26c are configured to come into contact with the glass sheet G when positioning the glass sheet G, and to retreat from the glass sheet G when the positioning is completed.

  Each of the pressing members 25a to 25c is a circular contact pressing body that abuts the corresponding side G1, G3 of the sheet glass G, respectively, and is orthogonal to each side G1, G3 of the sheet glass G with respect to each contact pressing body. Actuators that respectively apply moving forces in the directions.

  Each of the receiving members 26a to 26c has a columnar (or cylindrical) contact receiving body that contacts the corresponding side G2, G4 of the sheet glass G. The contact receiving body is formed of an elastic body and supported by a biasing member such as a spring or a fluid pressure cylinder. Therefore, each contact receiving body can be moved together with the sheet glass G while maintaining the contact with the corresponding side G2, G4 of the sheet glass G, respectively.

  As shown in FIG. 2, the displacement sensors 21a to 21c include two displacement sensors 21a that can contact the first side G1 of the sheet glass G and two pieces of displacement sensors 21a to 21c that can contact the second side G2 of the sheet glass G. , And one displacement sensor 21c that can abut on the third side G3.

  Further, as shown in FIG. 2, each of the displacement sensors 21 a to 21 c is a contact sensor, and has a contact that can contact each corresponding side G <b> 1 to G <b> 3 of the sheet glass G. Each of the displacement sensors 21a to 21c can compare the position data measured in contact with the glass sheet G with a reference value to measure the amount of positional deviation of the glass sheet G generated at the time of positioning.

  The cutting device 4 has a scribe wheel such as a diamond cutter. The cutting device 4 engraves a scribe line on the glass substrate by the scribe wheel, and folds the glass substrate along the scribe line to form a sheet glass G of a predetermined size.

  The cleaning device 5 includes a supply device that supplies a predetermined cleaning liquid to the glass sheet G, and a rotatable cleaning head. The cleaning device 5 brings the cleaning head into contact with the surface of the glass sheet G while supplying the cleaning liquid to the glass sheet G by the supply device, and removes foreign substances attached to the glass sheet G by the rotation thereof.

  Hereinafter, a method for manufacturing the glass sheet G will be described with reference to FIGS. As shown in FIG. 5, the manufacturing method of the sheet glass G according to the present embodiment mainly includes a forming step S1, a cutting step S2, an end face processing step S3, and a cleaning step S4.

  In the forming step S1, a known float method, roll-out method, slot down draw method, redraw method or the like can be used, but it is preferable to form the glass substrate by the overflow down draw method. In the overflow down draw method, molten glass is poured into an overflow groove provided at the top of a molded article having a substantially wedge-shaped cross section, and molten glass overflowing from both sides of the overflow groove along the side walls on both sides of the molded article. While flowing down, they are fused and integrated at the lower end of the molded body and stretched downward to continuously mold one glass substrate. Thereby, a large-sized glass substrate with high dimensional accuracy is formed.

  In the cutting step S2, the glass substrate is cut by scribe cutting by the cutting device 4 to obtain a sheet glass G having a predetermined size. In the cutting step S2, the scribe wheel is caused to travel along the planned cutting line set on the glass substrate, and a scribe line having a predetermined depth is cut along the planned cutting line on the glass substrate. Thereafter, a bending moment is applied to the periphery of the scribe line to break the sheet glass G along the scribe line. A plurality of glass sheets G are obtained by this splitting. Each glass sheet G is sequentially sent to the end face processing device 3, and the end face processing step S3 is executed.

  The end face processing step S <b> 3 includes a transport step of loading / unloading the sheet glass G with respect to the end face processing apparatus 3. In addition, as shown in FIG. 6, the end face processing step S3 includes a positioning step S31 of the sheet glass G by the positioning device 20, a fixing step S32 of fixing the sheet glass G to the surface plate 18, and a sheet glass G by each of the displacement sensors 21a to 21c. And a grinding step S34 of chamfering the end face of the sheet glass G with the processing tools 19a and 19b.

  Hereinafter, the transport process will be described in detail with reference to FIGS. 7 to 11, the illustration of the end face processing device 3 is omitted for convenience of description.

  FIG. 7 illustrates a case where the processing of the sheet glass G arranged at the processing position CP is completed and the end face processing is performed on the sheet glass G waiting at the first standby position WP1. In the state shown in FIG. 7, the guide member 9 of the elevating device 8 and the holding member 13 of the holding device 12 are at the standby position, and the transport belt 6 is stopped. The first auxiliary member 10 and the second auxiliary member 11 are in a horizontal posture.

  As shown in FIG. 7, at the first standby position WP <b> 1, the sheet glass G to be processed next stands by while being placed on the upper portion of the transport belt 6.

  At the processing position CP, the processed glass sheet G is placed on the support surface 23 of the surface plate 18. In this case, at the processing position CP, the upper portion of the transport belt 6 is located below the support surface 23 of the surface plate 18 and is not in contact with the plate glass G. Further, at the processing position CP, the suction of the plate glass G by the fixing unit 24 is released.

  At the second standby position WP <b> 2, the sheet glass G, which has already been processed by the end face processing device 3, stands by while being placed on the upper portion of the transport belt 6. As described above, the transport belt 6 supports the plate glass G at the first standby position WP1 and the second standby position WP2, but does not support the plate glass G at the processing position CP.

  From the state shown in FIG. 7, the transport device 2 transfers the plate glass G at the second standby position WP2 to the cleaning device 5 on the downstream side, and moves the plate glass G at the processing position CP to the second standby position WP2. Then, the plate glass G at the first standby position WP1 is moved to the processing position CP.

  That is, the transport process includes moving the sheet glass G at the first standby position WP1 to the processing position CP, moving the sheet glass G processed at the processing position CP to the second standby position WP2, and moving the sheet glass G to the second standby position WP2. The movement of the sheet glass G in the WP2 to the downstream side is performed at the same time. Specifically, as shown in FIG. 8, the lifting device 8 raises the guide member 9 and pushes up the upper portion of the transport belt 6. Thereby, the downstream end 10b of the first auxiliary member 10 is raised, and the first auxiliary member 10 is inclined. Further, the upstream end 11a of the second auxiliary member 11 also rises, and the second auxiliary member 11 is also inclined. Along with this, the upper portion of the transport belt 6 is elastically deformed, and has a shape along the guide member 9, the first auxiliary member 10, and the second auxiliary member 11. At this time, the portion of the conveyor belt 6 supported by the guide member 9 lifts the plate glass G at the processing position CP, and the plate glass G moves above the processing position CP (the position of the plate glass G indicated by the two-dot chain line). I do.

  As a result, all of the three glass sheets G are supported by the transport belt 6 and are transported by the transport device 2 at the same time. In this state, the transport device 2 rotates the pulley 7a of the drive device 7 to rotate the transport belt 6 in the direction indicated by the arrow in FIG. Thereby, each sheet glass G moves to the next position.

  In particular, the sheet glass G waiting at the first standby position WP1 is moved by the transport belt 6 to a position above the support surface 23 of the surface plate 18, that is, a position above the processing position CP. At this time, the transport device 2 temporarily stops the traveling transport belt 6. As described above, when the plate glass G is moved from the first standby position WP1 to the processing position CP, a part of the transfer belt 6 is disposed to move the plate glass G to a position above the processing position CP. Is moved upward by the lifting device 8 (raising step).

  Next, the lifting device 8 lowers the guide member 9 located at the upper position, and returns the guide member 9 to the standby position. Accordingly, the first auxiliary member 10 and the second auxiliary member 11 also return to the horizontal posture. Thereby, the sheet glass G that has moved from the first standby position WP1 to the processing position CP descends from a position above the surface plate 18 toward the surface plate 18 as shown in FIG. Is placed. When the guide member 9 returns to the standby position, the conveyor belt 6 moves below the support surface 23 of the surface plate 18. As described above, in the transporting step, when the end face of the sheet glass G is processed, the sheet glass G disposed above the processing position CP is disposed at the processing position CP, and the support of the sheet glass G by the transport belt 6 is released. To this end, a step (a descending step) of moving a part of the transport belt 6 below the processing position CP (the position of the support surface 23 of the surface plate 18) by the lifting device 8 is provided.

  As shown in FIG. 9, the sheet glass G at the processing position in FIG. 8 has been moved to the second standby position WP2, and the sheet glass G at the second standby position WP2 has been transferred to the cleaning device 5. Further, as shown in FIGS. 8 and 9, a new sheet glass G formed by the cutting device 4 is moving toward the end face processing device 3.

  Before receiving the new sheet glass G, the transport device 2 operates the holding device 12 to move the holding member 13 upward from the standby position. Then, the support portion 16 of the holding member 13 contacts the lower surface of the glass sheet G at the second standby position WP2, and further pushes the glass sheet G upward. Thereby, as shown in FIG. 10, the plate glass G is in a state of being separated upward from the transport belt 6, that is, in a state of being located above the second standby position WP2.

  As described above, in the transport step, when another plate glass G is placed at the first standby position WP1 in a state where the plate glass G is placed at the processing position CP, the plate glass G placed at the second standby position WP2 is moved. A step (holding step) of holding at a position above the second standby position WP2 by the holding device 12 is provided. In the holding step, the support portion 16 of the holding member 13 discharges the liquid L from the hole 17. As a result, the liquid L is interposed between the support portion 16 and the glass sheet G, thereby preventing the glass sheet G from being scratched in the holding step.

  In this state, there is no sheet glass G in contact with the conveyor belt 6. In this state, the positioning step S31, the fixing step S32, the measuring step S33, and the grinding step S34 are sequentially performed on the sheet glass G at the processing position CP. During the execution of these steps S31 to S34, the transport device 2 rotates the transport belt 6 to receive a new sheet glass G from the cutting device 4 and, as shown in FIG. After moving to WP1, the transport belt 6 is stopped.

  When a new sheet glass G arrives at the first standby position WP1, the holding device 12 lowers the holding member 13 and returns the holding member 13 to the standby position (the position indicated by the two-dot chain line in FIG. 11). Thereby, the glass G separates from the holding member 13 and is again supported by the transport belt 6. When the holding member 13 returns to the standby position, the transport device 2 returns to the state shown in FIG. 7, and thereafter repeats the same operation as described above.

  In the positioning step S31, the contact pressing body of the two pressing members 25a and 25b presses the first side G1 of the sheet glass G, and the contact pressing body of one pressing member 25c moves the third side G3. Push it. As a result, the second side G2 of the sheet glass G contacts the contact receiving members of the two receiving members 26a and 26b, and the fourth side G4 contacts the contact receiving member of the single receiving member 26c. Touch (see FIG. 2). Thereby, the plate glass G is positioned with respect to the surface plate 18.

  When the positioning step S31 is completed, the positioning device 20 is retracted from the glass sheet G, and the fixing step S32 is executed. In the fixing step S32, a negative pressure is generated on the back side of the glass sheet G through the plurality of fixing portions (holes) 24 of the surface plate 18, whereby the glass sheet G is suction-held on the support surface 23 of the surface plate 18.

  When the fixing step S32 ends, a measurement step S33 is executed. In this measurement step S33, each of the displacement sensors 21a to 21c comes into contact with the corresponding end face of each side G1 to G3 of the sheet glass G, and measures the position (displacement). In the measurement step S33, the amount of deviation from the reference position of the sheet glass G positioned in the positioning step S31 is detected.

  When the measurement step S33 is completed, the displacement sensors 21a to 21c are retracted from the sheet glass G, and the grinding step S34 is executed. In this grinding step S34, the amount of grinding of each of the processing tools 19a and 19b is determined based on the amount of displacement of the end surface of the sheet glass G measured by each of the displacement sensors 21a to 21c. Each of the processing tools 19a and 19b performs grinding on an end face based on the grinding amount determined by the displacement sensors 21a to 21c. Each of the processing tools 19a and 19b has its end surface ground from one end to the other end of the first side G1 and the second side G2.

  In the end face processing step S3, after the end faces of the two sides G1 and G2 of the square sheet glass G are ground, the sheet glass G is rotated 90 ° in the horizontal direction to change its posture, and the remaining two pieces are ground. Although the end faces relating to the sides G3 and G4 are ground, this step is not shown. Further, after the grinding step S34 is performed, a corner cutting step (not shown) of the sheet glass G may be performed, but the embodiment is not limited thereto.

  When the grinding step S34 ends, a cleaning step S4 is executed. In the cleaning step S4, the glass sheet G on which the end face processing has been completed is transferred to the cleaning device 5, and the cleaning liquid is supplied by the supply device, and the surface of the glass sheet G is cleaned by the cleaning head. The sheet glass G is commercialized through the above steps S1 to S4.

  According to the manufacturing method and the manufacturing apparatus 1 of the plate glass G according to the present embodiment described above, the plate glass G is directly supported by the transport belt 6 and a part of the transport belt 6 is moved up and down to transfer the plate glass G. Can be performed efficiently.

  That is, when moving the sheet glass G from the first standby position WP1 to the processing position CP, the transport device 2 moves a part of the transport belt 6 upward by the elevating device 8 (elevating step). Thereby, the plate glass G is moved above the processing position CP by the transport belt 6 without contacting the surface plate 18 of the end face processing device 3.

  In addition, by moving a part of the transport belt 6 that has been raised downward, the glass sheet G is placed on the support surface 23 of the platen 18, that is, the processing position CP. At this time, the conveyor belt 6 is further moved below the support surface 23 of the platen 18 which is the processing position CP by the elevating device 8 (down step), and is separated from the plate glass G at the processing position CP.

  By moving away from the glass sheet G, the conveyor belt 6 can run without contacting the glass sheet G. Therefore, by moving the transport belt 6 while the plate glass G is kept at the processing position CP, a new unprocessed plate glass G can be transported to the first standby position WP1.

  In the holding step (see FIGS. 10 and 11), the sheet glass G is transported from the processing position CP to the second standby position WP2, and the sheet glass G supported by the transport belt 6 is held by the holding device 12 in the second standby position. Hold it above WP2. As a result, the glass sheet G can be separated from the conveyor belt 6 and run round without contacting the glass sheet G.

  That is, the transport belt 6 passes the new unprocessed plate glass G to the first position without contacting the plate glass G to be processed at the processing position CP and the processed plate glass G through the lowering step and the holding step. It can be arranged at the standby position WP1. For this reason, it is possible to arrange a new sheet glass G at the first standby position WP1 while processing the end face of the sheet glass G at the processing position CP by the end face processing device 3.

  Thereby, processing and conveyance of the sheet glass G can be performed efficiently. Therefore, the tact time can be shortened as much as possible, and the production efficiency of the sheet glass G can be significantly improved.

  The present invention is not limited to the configuration of the above-described embodiment, nor is it limited to the above-described operation and effect. The present invention can be variously modified without departing from the gist of the present invention.

  In the above-described first embodiment, in the end face processing step S3, the grinding step S34 for chamfering the end face of the sheet glass G is exemplified, but the present invention is not limited to this. The end face processing step S3 may include a polishing step of polishing the end face of the sheet glass G in addition to the grinding step S34.

  In the above-described first embodiment, the first auxiliary member 10 and the second auxiliary member 11 are used. However, the first auxiliary member 10 and the second auxiliary member 11 are not used, and only the guide member 9 is used. The part may be moved up and down. In addition, the first auxiliary member 10 and the second auxiliary member 11 may be non-rotatably connected to the guide member 9, in other words, the first auxiliary member 10 and the second auxiliary member 11 that are inclined may be guided. It may be fixed to the member 9. In this embodiment, when the guide member 9 is at the standby position, the transport belt 6 does not contact the first auxiliary member 10 and the second auxiliary member 11. As the guide member 9 rises, the first auxiliary member 10 and the second auxiliary member 11 come into contact with the transport belt 6 and guide the travel of the transport belt 6.

  In the above-described first embodiment, the first auxiliary member 10 and the second auxiliary member 11 are inclined only by the elevating device 8, but as in the second embodiment shown in FIG. A device 31 and a second tilt device 32 may be provided.

  The manufacturing apparatus 1 according to the second embodiment is obtained by adding a first tilt device 31 and a second tilt device 32 to the manufacturing device 1 according to the first embodiment. The first tilting device 31 tilts the first auxiliary member 10 by raising a part of the first auxiliary member 10 and horizontally lowers the first auxiliary member 10 by lowering a part of the first auxiliary member 10. Return to The second tilting device 32 tilts the second auxiliary member 11 by raising a part of the second auxiliary member 11, and lowers the second auxiliary member 11 by lowering a part of the second auxiliary member 11. Back to horizontal. The first tilting device 31 and the second tilting device 32 can be configured by actuators, similarly to the lifting / lowering device 8.

  In the first embodiment, the guide member 9 is supported by the two actuators 8a. However, as in the third embodiment shown in FIGS. 13 and 14, a horizontal maintaining mechanism for maintaining the guide member 9 in a horizontal state. May be provided. 13 and 14, only the elevating device 8, the guide member 9, the first auxiliary member 10 and the second auxiliary member 11 are shown to facilitate understanding of the horizontal maintenance mechanism 40, and other configurations are illustrated. Omitted.

  In the third embodiment, the upstream end 9a of the guide member 9 and the downstream end 10b of the first auxiliary member 10 are connected to be rotatable and movable in the longitudinal direction of the first auxiliary member 10. For such connection, a connection arm 9d is provided at the upstream end 9a of the guide member 9, and a pin 9e is fixed to the tip of the connection arm 9d. A long hole 10c for receiving a pin 9e provided at the tip of the connecting arm 9d is provided at the downstream end 10b of the first auxiliary member 10. For this reason, the pin 9 e provided at the tip of the connecting arm 9 d is rotatable and movable in the longitudinal direction of the first auxiliary member 10 due to the elongated hole 10 c of the downstream end 10 b of the first auxiliary member 10. . Similarly, the downstream end 9 b of the guide member 9 and the upstream end 11 a of the second auxiliary member 11 are connected to be rotatable and movable in the longitudinal direction of the first auxiliary member 10.

  Both the upstream end 10a of the first auxiliary member 10 and the downstream end 11b of the second auxiliary member 11 are rotatably held. In order to hold in this manner, rotation pins 10d and 11d are provided at the upstream end 10a of the first auxiliary member 10 and the downstream end 11b of the second auxiliary member 11, respectively. Each of the rotating pins 10d and 11d is held by a first holding member (not shown).

  The horizontal maintenance mechanism 40 has a first rotating member 41 and a second rotating member 42 that can rotate around an axis (an axis perpendicular to the paper surface) orthogonal to the transport direction. Each of the first rotating member 41 and the second rotating member 42 of the third embodiment has a triangular shape, and is rotatable around the axes of the rotating pins 41a and 42a provided on the first top. It is. Each of the rotation pins 41a and 42a is held by a second holding member (not shown).

  The first rotating member 41 and the second rotating member 42 are arranged side by side in the transport direction with an interval. Further, both the first rotating member 41 and the second rotating member 42 are connected to the guide member 9 so as to be rotatable around an axis orthogonal to the transport direction. The first rotation member 41 and the second rotation member 42 of the third embodiment are connected to the guide member 9 via connection pins 41b and 42b provided on the second top, respectively, and the connection pins 41b and 42b Is rotatable around the axis of.

  The distal end of the rod of the actuator 8a, which is the elevating device 8, is pressed against the third tops of the first rotating member 41 and the second rotating member 42 from below.

  Next, the operation of moving the guide member 9 up and down by the manufacturing apparatus of the third embodiment will be described. When raising the guide member 9, as shown in FIG. 14, the actuator 8a as the lifting / lowering device 8 is extended. As a result, the third tops of the first rotating member 41 and the second rotating member 42 are pushed up by the actuator 8a, so that the first rotating member 41 and the second rotating member 42 are connected to the rotating pins 41a and 42a. Rotate counterclockwise around the axis. As a result, the guide member 9 slightly moves in the direction opposite to the transport direction while ascending.

  As the guide member 9 rises, the first auxiliary member 10 turns around the axis of the turning pin 10d provided at the upstream end 10a and tilts. In addition, the second auxiliary member 11 rotates around the axis of a rotation pin 11d provided at the downstream end portion 11b and inclines.

  As the guide member 9 slightly moves in the direction opposite to the transport direction, a pin 9e fixed to the connection arm 9d on the upstream side of the guide member 9 is provided at the downstream end 10b of the first auxiliary member 10. In the elongated hole 10c. Further, the pin 9h fixed to the connection arm 9f on the downstream side of the guide member 9 moves in the elongated hole 11c provided in the upstream end 11a of the second auxiliary member 11.

  The square having the axes of the rotation pins 41a, the connection pins 41b, the connection pins 42b, and the rotation pins 42a as vertices is a parallelogram. While the guide member 9 is rising, the parallelogram is maintained while changing the angle of the inner angle. Therefore, the line connecting the connecting pin 41b and the connecting pin 42b is kept parallel to the line connecting the rotating pin 41a and the rotating pin 42a. Here, the line connecting the rotation pin 41a and the rotation pin 42a is always horizontal, so the line connecting the connection pin 41b and the connection pin 42b is also always horizontal. Therefore, the guide member 9 is maintained in a horizontal state while the guide member 9 is rising.

  When lowering the guide member 9, the actuator 8a, which is the elevating device 8, is shortened. In response to this, the first rotating member 41 and the second rotating member 42 rotate clockwise around the axes of the rotating pins 41a and 42a by their own weight. Go to As the guide member 9 descends, the first auxiliary member 10 and the second auxiliary member 11 become horizontal (see FIG. 13). In the process of lowering the guide member 9, the guide member 9 is maintained in a horizontal state for the same reason as the process of raising.

  In the above-described third embodiment, the first auxiliary member 10 and the second auxiliary member 11 are tilted only by the lifting / lowering device 8, but the first tilting device 31 and the second tilting device 32 are assisted as in the second embodiment. It may be provided in some way.

  The first rotating member 41 and the second rotating member 42 may be connected to the actuator 8a, which is the elevating device 8, via a connecting pin. In this case, the positions of the third tops of the first rotating member 41 and the second rotating member 42 in the transport direction slightly move as they rotate around the axes of the rotating pins 41a and 42a. In order to absorb the slight movement of the third top, it is preferable to make the hole for receiving the connecting pin an elongated hole, or to make the inner diameter of the hole larger than the outer diameter of the connecting pin. From the viewpoints of durability and operational stability, it is more preferable that the lower end of the actuator 8a is rotatably held. If the lower end of the actuator 8a is rotatably held, the upper end of the actuator 8a moves in accordance with the movement of the third apex, and the actuator 8a rotates around the rotation axis provided at the lower end of the actuator 8a. It turns and tilts.

  The lifting device 8 is not limited to the actuator 8a, and may use a motor. In this case, for example, the rotation shaft may be fixed to the first rotation member 41 instead of the rotation pin 41a, and the rotation shaft may be connected to the motor in a state where the rotation shaft is rotatably supported.

  The first rotating member 41 and the second rotating member 42 are not limited to a triangular shape, but may be a rod shape.

DESCRIPTION OF SYMBOLS 1 Manufacturing apparatus 2 Conveying apparatus 3 End surface processing apparatus 6 Conveying belt 8 Elevating apparatus 9 Guide member 9a Upstream end 9b Downstream end 10 First auxiliary member 10a Upstream end 10b Downstream end 11 Second auxiliary member 11a Upstream end 11b Downstream end 12 Holding device 18 Surface plate 18a Surface plate component 18b Surface plate component 18c Surface plate component 18d Surface plate component 20 Positioning device 21a Displacement sensor 21b Displacement sensor 21c Displacement Sensor 23 Support surface 24 Fixing part 31 First tilting device 32 Second tilting device 40 Horizontal maintenance mechanism 41 First rotating member 42 Second rotating member CP Processing position G Plate glass S3 End face processing step S31 Positioning step S32 Fixing step S33 Measurement Step WP1 First standby position WP2 Second standby position

Claims (15)

A method for manufacturing a sheet glass comprising an end face processing step of processing an end face of the sheet glass by an end face processing device,
The end face processing step includes a transfer step of moving the sheet glass to a first standby position by a transfer device and a processing position provided on the downstream side in the transfer direction of the transfer device from the first standby position,
The end face processing device includes a surface plate having a support surface on which the glass sheet is placed and a fixing portion for fixing the glass sheet,
The transport device is a transport belt that transports the plate glass, a guide member that guides the travel of the transport belt, and an elevating device that moves up and down a part of the transport belt by moving the guide member up and down. Prepared,
The upstream end of the guide member is located upstream of the upstream end of the surface plate in the transport direction,
The downstream end of the guide member is located downstream from the downstream end of the surface plate in the transport direction,
The transporting step includes:
When moving the plate glass from the first standby position to the processing position, a lifting step of moving a part of the transport belt upward by the lifting device to dispose the plate glass above the processing position;
When the end face of the sheet glass is processed by the end face processing apparatus, the sheet glass disposed above the processing position is disposed at the processing position, and the conveying belt is separated from the sheet glass by an upper side. A lowering step of moving the part of the transport belt moved to below the processing position by the elevating device,
While the end face of the sheet glass disposed at the processing position is being processed by the end face processing device, the transport belt moved below the processing position is caused to travel to move another sheet glass to the first standby position. And a step of arranging the sheet glass. The transport device is connected to the upstream end of the guide member, and guides the travel of the transport belt. The first auxiliary member is coupled to the downstream end of the guide member, and the transport device travels the transport belt. And a second auxiliary member for guiding the
In the raising step, the first auxiliary member and the second auxiliary member are tilted with moving the guide member upward by the lifting device,
2. The method according to claim 1, wherein in the lowering step, the first auxiliary member and the second auxiliary member are made horizontal as the guide member is moved downward by the elevating device. 3. The transfer device includes a first tilting device that tilts the first auxiliary member by raising a part of the first auxiliary member, and a second tilting member that raises a part of the second auxiliary member. And a second tilt device for tilting
In the raising step, the first auxiliary member is tilted by the first tilting device, and the second auxiliary member is tilted by the second tilting device, as the guide member is moved upward by the lifting device. ,
In the lowering step, the first auxiliary member is leveled by the first tilting device, and the second auxiliary member is leveled by the second tilting device, as the guide member is moved downward by the lifting device. The method for producing a glass sheet according to claim 2.   4. The method for manufacturing a glass sheet according to claim 1, wherein the transfer device includes a horizontal maintenance mechanism that mechanically maintains the guide member horizontally in a process of moving the guide member by the lifting device. 5. . The horizontal maintaining mechanism has a first rotating member and a second rotating member that can rotate around an axis orthogonal to the transport direction,
The first rotating member and the second rotating member are arranged at intervals in the transport direction, and are connected to the guide member so as to be rotatable around an axis perpendicular to the transport direction. A method for producing a sheet glass according to claim 4. The transporting step is configured to move the sheet glass having been subjected to the end face processing to a second standby position provided on the downstream side in the transport direction from the processing position by the transport belt,
At the second standby position, a holding device that holds the plate glass in a state where the plate glass is separated from the transport belt is provided,
In the transporting step, in a state where the plate glass is disposed at the processing position, when the other plate glass is disposed at the first standby position, the plate glass at the second standby position is moved to the second standby position by the holding device. 6. The method for manufacturing a sheet glass according to claim 1, further comprising a holding step of holding the sheet glass above the standby position. 7.   The transporting step includes: moving the sheet glass at the first standby position to the processing position; moving the sheet glass processed at the processing position to the second standby position; The method for producing a glass sheet according to any one of claims 1 to 6, wherein the movement of the glass sheet to the downstream side is simultaneously performed. The end face processing device includes a surface plate having a support surface on which the plate glass is placed and a fixing portion for fixing the plate glass, a positioning device for positioning the plate glass, and a displacement for measuring a position of an end surface of the plate glass. And a sensor,
The end face processing step is a positioning step of the sheet glass by the positioning device, a fixing step of fixing the sheet glass to the support surface by the fixing unit, and a measurement step of measuring the position of the end face of the sheet glass by the displacement sensor. The method for producing a glass sheet according to any one of claims 1 to 7, comprising: The plate glass is configured in a square shape,
9. The method of manufacturing a sheet glass according to claim 8, wherein, in the measuring step, a position of the end face on two opposite sides of the sheet glass is measured by the displacement sensor. 10.   The device according to any one of claims 1 to 9, wherein the surface plate is configured to be divided into a plurality of constituent members, and a traveling path of the transport belt is formed between the constituent members. Manufacturing method of sheet glass. In a sheet glass manufacturing apparatus including a transfer device that transfers a sheet glass in a predetermined transfer direction, and an end surface processing device that processes an end surface of the sheet glass,
The end face processing device includes a surface plate having a support surface on which the glass sheet is placed and a fixing portion for fixing the glass sheet,
The transport device is a transport belt that transports the plate glass, a guide member that guides the travel of the transport belt, and an elevating device that moves up and down a part of the transport belt by moving the guide member up and down. Prepared,
The upstream end of the guide member is located upstream of the upstream end of the surface plate in the transport direction,
The downstream end of the guide member is located downstream from the downstream end of the surface plate in the transport direction,
The transport belt is configured to move the sheet glass to a first standby position and a processing position provided downstream of the first standby position in the transport direction than the first standby position,
The transfer device,
When moving the plate glass from the first standby position to the processing position, a part of the transport belt is moved upward by a lifting device to arrange the plate glass above the processing position,
When processing the end face of the sheet glass by the end face processing apparatus, the sheet glass disposed above the processing position is disposed at the processing position, and the support of the sheet glass by the transport belt is released. Moving a part of the transport belt moved upward from the processing position by the lifting / lowering device,
While the end face of the sheet glass disposed at the processing position is being processed by the end face processing device, the transport belt moved below the processing position is caused to travel to move another sheet glass to the first standby position. An apparatus for manufacturing a sheet glass, wherein the apparatus is configured to be arranged in a plate. The transport device is connected to the upstream end of the guide member, and guides the travel of the transport belt. The first auxiliary member is coupled to the downstream end of the guide member, and the transport device travels the transport belt. And a second auxiliary member for guiding the
Along with moving the guide member upward by the elevating device, inclining the first auxiliary member and the second auxiliary member, and moving the guide member downward by the elevating device, The sheet glass transport device according to claim 11, wherein the first auxiliary member and the second auxiliary member are configured to be horizontal. The transport device includes a first tilt device that tilts the first auxiliary member, and a second tilt device that tilts the second auxiliary member,
As the guide member is moved upward by the elevating device, the first auxiliary member is tilted by the first tilting device, and the second auxiliary member is tilted by the second tilting device. As the guide member is moved downward by the device, the first auxiliary member is made horizontal by the first tilt device, and the second auxiliary member is made horizontal by the second tilt device. The sheet glass conveying device according to claim 12.   14. The sheet glass transfer device according to claim 11, wherein the transfer device includes a horizontal maintaining mechanism that mechanically maintains the guide member horizontally in a process of moving the guide member by the lifting device. . The horizontal maintaining mechanism has a first rotating member and a second rotating member that can rotate around an axis orthogonal to the transport direction,
The first rotating member and the second rotating member are arranged at intervals in the transport direction, and are connected to the guide member so as to be rotatable around an axis perpendicular to the transport direction. The sheet glass conveying device according to claim 14.

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