JP6562305B2 - Sheet glass manufacturing method and manufacturing apparatus - Google Patents

Description

  The present invention relates to a plate glass manufacturing method and a manufacturing apparatus.

  When manufacturing flat glass for flat panel displays (FPD) such as liquid crystal displays (LCD), plasma displays (PDP), organic EL displays (OLED), etc., a large glass substrate formed by a molding method such as a downdraw method. Is cut to form a plate glass of a predetermined size. Specifically, a plate glass is formed by cleaving the glass substrate using a scribe wheel such as a diamond cutter, for example.

  When a glass substrate is cut to form a plate glass, a minute crack having a depth of about several μm to 100 μm is formed on the cut surface (end surface). Since this crack causes a decrease in the mechanical strength of the plate glass, it is removed by processing the end face of the plate glass. That is, in order to increase the mechanical strength of the plate glass, prevent cracking and chipping of the plate glass, and facilitate handling in the subsequent process, the end surface of the plate glass is subjected to grinding (chamfering) and polishing.

  As a sheet glass manufacturing apparatus, as disclosed in Patent Document 1, a cutting part that cuts a cutting line (scribe line) into a glass substrate, a folding part that splits the glass substrate along the cutting line, Some include a grinding unit that grinds an end surface of a plate glass that is formed later, and a conveyance unit that conveys the plate glass.

  The transport unit in the manufacturing apparatus includes a plurality of suction pads that can be moved up and down, and a transfer device that moves the suction pads in the horizontal direction. The suction pad descends toward the glass substrate placed on the cutting part 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 folding portion, and the glass substrate is placed on the folding portion. Similarly, the suction pad sucks the plate glass formed by the folding part and transfers it to the grinding part.

JP 2010-47455 A

  Since the transport unit in the conventional manufacturing apparatus transports the plate glass by the suction pad and the transfer device, it takes time to transport the plate glass by the lifting and lowering operation and suction operation of the suction pad, and further the horizontal movement operation of the plate glass by the transfer device. Cost. For this reason, the tact time concerning manufacture of plate glass became long, and manufacture of efficient plate glass was not able to be performed.

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

  The present invention is for solving the above-described problems, and in the manufacturing method of a plate glass including an end surface processing step of processing the end surface of the plate glass by an end surface processing apparatus, the end surface processing step is performed by applying the plate glass in a predetermined conveyance direction. A transport step of transporting the plate glass to a first standby position and a processing position provided downstream of the first standby position in the transport direction by a transport belt, the transport step comprising: When the plate glass is moved from the standby position to the processing position, a lifting step in which a part of the conveyor belt is moved upward by a lifting device so as to place the plate glass above the processing position; When the end surface is processed by the end surface processing apparatus, the plate glass disposed above the processing position is disposed at the processing position. And in order to separate the said conveyance belt from the said glass plate, the lower part which moves the said one part of the said conveyance belt moved upwards rather than the said processing position by the said raising / lowering apparatus, and it arrange | positioned in the said processing position Placing the other plate glass at the first standby position by running the conveyor belt moved below the processing position while processing the end face of the plate glass by the end face processing device; It is characterized by providing.

  In this method, when the plate glass is moved from the first standby position to the processing position in order to process the end surface of the plate glass by the end surface processing apparatus, the lifting device moves a part of the transport belt upward (ascending step). Thereby, plate glass moves above a processing position with a conveyance belt, without contacting a part (for example, surface plate) of the end surface processing apparatus in a processing position. Furthermore, the plate glass is placed at the processing position by moving a part of the raised conveyor belt downward. The conveyor belt moves further below the processing position by the operation of the lifting device, and is separated from the plate glass at the processing position (lowering step).

  By separating the conveying belt from the plate glass, it is possible to travel without contacting the plate glass. Therefore, a new unprocessed sheet glass (other sheet glass) can be disposed at the first standby position by running the conveyor belt while the sheet glass is disposed at the processing position. Thereby, it becomes possible to arrange | position a new plate glass in a 1st standby position, processing the end surface of plate glass with an end surface processing apparatus. Therefore, the tact time can be shortened as much as possible, and the production efficiency of the plate glass can be improved.

  Moreover, in the manufacturing method of the plate glass which concerns on this invention, the said conveyance process is made to move the plate glass by which the end surface process was complete | finished to the 2nd standby position provided in the downstream of the said conveyance direction rather than the said processing position with the said conveyance belt. The second standby position is provided with a holding device that holds the plate glass in a state in which the plate glass is separated from the conveyance belt, and the plate glass is disposed at the processing position in the conveyance step. A holding step of holding the plate glass at the second standby position above the second standby position by the holding device when placing the other plate glass at the first standby position in the state where It is desirable to provide.

  In this method, the plate glass moved from the first standby position to the processing position can be transported further to the second standby position on the downstream side by the transport belt. The holding device can separate the plate glass from the transport belt by holding the plate glass that has arrived at the second standby position above the second standby position (holding step). Thereby, the conveyance belt can travel without contacting the plate glass. That is, the transport belt passes through the lowering step and the holding step, so that a new unprocessed plate glass is brought into the first standby position without contacting the plate glass processed at the processing position and the processed plate glass. Can be arranged. For this reason, it becomes possible to arrange | position a new plate glass in a 1st standby position, processing the end surface of plate glass with an end surface processing apparatus. Thereby, the tact time can be further shortened, and the production efficiency of the plate glass can be dramatically improved.

  Moreover, in this method, the said conveyance process is the movement to the said processing position of the said plate glass in the said 1st standby position, and the movement to the said 2nd standby position of the said plate glass which complete | finished processing in the said processing position. It is desirable to simultaneously perform the movement of the plate glass in the second standby position to the downstream side. Thereby, plate glass can be conveyed efficiently.

  In this method, it is preferable that the lifting device includes a guide member that guides the transport belt in the transport direction and is movable in the vertical direction. According to this, a part of the conveyor belt can be raised and lowered while being guided by the guide member. Accordingly, the transport belt can reliably and efficiently transport the plate glass by moving up and down without deviating from the transport direction.

  Further, in this method, the end face processing device includes a surface plate on which the plate glass is placed and a fixing plate for fixing the plate glass, a positioning device for positioning the plate glass, and an end face of the plate glass. A displacement sensor for measuring a position, and the end face processing step includes a positioning step of the plate glass by the positioning device, a fixing step of fixing the plate glass to the support surface by the fixing portion, and the displacement sensor It is desirable to provide a measuring step for measuring the position of the end face of the plate glass.

  According to such a configuration, the position of the end face of the plate glass after fixing can be accurately grasped by executing the measuring process after the positioning process and the fixing process. 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 this method, it is desirable that the plate glass is formed in a quadrangular shape, and in the measurement step, the position of the end face related to two opposite sides of the plate glass is measured by the displacement sensor. According to such a configuration, the end face processing apparatus can process these end faces with high accuracy by measuring the positions of the end faces relating to the two sides of the plate glass.

  In the present method, it is preferable that the surface plate is divided into a plurality of constituent members, and a travel path of the conveyor belt is formed between the constituent members. Thereby, a conveyance belt can convey plate glass, without contacting a surface plate.

  The present invention is for solving the above-mentioned problem, and in the sheet glass manufacturing apparatus comprising: a conveying device that moves the plate glass in a predetermined conveying direction; and an end surface processing device that processes the end surface of the plate glass; The apparatus includes a conveyance belt that conveys the plate glass, and an elevating device that raises and lowers a part of the conveyance belt, and the conveyance belt has a first standby position and a conveyance direction that is closer to the conveyance direction than the first standby position. The plate glass is configured to move to a downstream processing position and a second standby position provided on the downstream side of the processing position, and the conveying device moves the plate glass from the first standby position to the processing position. When moving the sheet glass, a part of the conveyor belt is moved upward by an elevating device so as to place the sheet glass above the processing position, and the end surface of the sheet glass is When processing by the surface processing apparatus, the plate glass arranged above the processing position is arranged at the processing position, and the plate glass is moved upward to release the support of the plate glass by the conveyor belt. A part of the conveyor belt is moved below the processing position by the lifting device, and the end surface of the plate glass arranged at the processing position is moved below the processing position while being processed by the end surface processing device. It is configured that another sheet glass is arranged at the first standby position by running the transported belt.

  According to such a configuration, when the plate glass is moved from the first standby position to the processing position in order to perform the end surface processing of the plate glass by the end surface processing device, the lifting device moves a part of the transport belt upward. Thereby, plate glass moves above a processing position with a conveyance belt, without contacting a part (for example, surface plate) of the end surface processing apparatus in a processing position. Furthermore, by moving a part of the raised conveyor belt downward from this state, the plate glass is placed at the processing position. The conveyor belt moves further downward than the processing position by the operation of the lifting device and is separated from the plate glass at the processing position.

  By separating the conveying belt from the plate glass, it is possible to travel without contacting the plate glass. Therefore, a new unprocessed sheet glass (other sheet glass) can be disposed at the first standby position by running the conveyor belt while the sheet glass is disposed at the processing position.

  As described above, the plate glass is directly supported by the transport belt, and a part of the transport belt is moved up and down, whereby the plate glass can be transported efficiently. Thereby, tact time can be shortened as much as possible, and the manufacturing efficiency of plate glass can be improved.

  Further, in the plate glass manufacturing apparatus according to the present invention, the transport belt is configured to move the plate glass whose end face processing has been completed to a second standby position provided downstream of the processing position in the transport direction, The conveyance device includes a holding device that holds the plate glass in the second standby position in a state where the plate glass is separated from the conveyance belt, and the holding device has the plate glass at the processing position. It is configured to hold the plate glass in the second standby position above the second standby position when the other glass plate is disposed in the first standby position in the disposed state. Is desirable.

  According to this configuration, the plate glass moved from the first standby position to the processing position can be transported further to the second standby position on the downstream side by the transport belt. The holding device holds the plate glass that has arrived at the second standby position above the second standby position, thereby separating the plate glass from the transport belt. Thereby, the conveyance belt can travel without contacting the plate glass. That is, the conveyor belt places a new unprocessed plate glass at the first standby position without contacting the plate glass processed at the processing position and the processed plate glass held above the second standby position. Can do. For this reason, it becomes possible to arrange | position a new plate glass in a 1st standby position, processing the end surface of plate glass with an end surface processing apparatus. Thereby, the tact time can be further shortened, and the production efficiency of the plate glass can be dramatically improved.

  ADVANTAGE OF THE INVENTION According to this invention, when performing end surface processing of plate glass, a tact time can be shortened and manufacturing efficiency can be improved by conveying plate glass efficiently.

It is a side view of the end surface processing apparatus which concerns on this invention. It is a top view of an end surface processing apparatus. It is III-III sectional drawing of FIG. It is IV-IV sectional drawing of FIG. It is a flowchart which shows the manufacturing method of plate glass. It is a flowchart which shows an end surface process. It is a side view which shows a part of conveyance process in the end surface processing process of plate glass. It is a side view which shows a part of conveyance process in the end surface processing process of plate glass. It is a side view which shows a part of conveyance process in the end surface processing process of plate glass. It is a side view which shows a part of conveyance process in the end surface processing process of plate glass. It is a side view which shows a part of conveyance process in the end surface processing process of plate glass.

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

  As shown in FIG.1 and FIG.2, this manufacturing apparatus 1 is provided with the conveying apparatus 2 which conveys the plate glass G to a predetermined direction, and the end surface processing apparatus 3 which processes an end surface of the plate glass G. As shown in FIG. In addition, the manufacturing apparatus 1 includes a cutting device 4 disposed upstream of the end surface processing device 3 and a cleaning device 5 disposed downstream of the end surface processing device 3.

  The conveying device 2 transfers the glass sheet G from the cutting device 4 to the end surface processing device 3 and from the end surface processing device 3 to the cleaning device 5. Specifically, as shown in FIG. 1, the conveying device 2 includes a first standby position WP <b> 1, a machining position CP for machining by the end face machining device 3, and a downstream side of the machining position CP in the process of conveying the glass sheet G. The glass sheet G is moved to the second standby position WP2 where the glass sheet G is made to wait. Moreover, the conveyance apparatus 2 stops the plate glass G in each position WP1, CP, WP2 in conjunction with a sensor (not shown).

  The conveying device 2 holds a plurality of conveying belts 6 that convey the plate glass G, a driving device 7 for the conveying belt 6, an elevating device 8 that moves a part of the conveying belt 6 up and down, and the plate glass G in a predetermined position. Holding device 9.

  The conveyor belt 6 is configured to be endless by rubber or another elastic body, and is configured to circulate and rotate when driven by the driving device 7. In the present embodiment, three conveyor belts 6 are illustrated, but the number of conveyor belts 6 is not limited to this, and can be set as appropriate according to the size of the glass sheet G.

  The driving device 7 includes a plurality of pulleys 10 around which the conveyance belt 6 is wound, and a motor (not shown) that drives the pulleys 10. The driving device 7 is not limited to the pulley 10 described above, and can drive the conveyor belt 6 by a sprocket and other various driving bodies.

  The lifting device 8 includes a guide member 11 that guides the conveyor belt 6 and an actuator 12 that moves the guide member 11 up and down. As shown in FIGS. 1 and 2, the guide member 11 is configured as a pair so as to sandwich the end face processing device 3, but the number is not limited to this. Moreover, the guide member 11 has the recessed part 11a which supports the conveyance belt 6, as shown in FIG. The guide member 11 can be made of, for example, a synthetic resin. The actuator 12 includes a cylinder device, but is not limited to this. The actuator 12 changes the position of the guide member 11 to a standby position and a position above the standby position.

  As shown in FIG. 1, the holding device 9 is disposed so as to correspond to the second standby position WP <b> 2 of the plate glass G. The holding device 9 includes a plurality of holding members 13 that can hold the plate glass G, and an actuator 14 that raises and lowers each holding member 13.

  The holding member 13 is a hollow bar member made of metal and configured in a long shape. The width of the holding member 13 is set to be smaller than the interval between the transport belts 6. As a result, the holding member 13 can move in the vertical direction between the conveyor belts 6. As shown in FIG. 4, the inside of the holding member 13 is filled with water or other liquid L. The holding member 13 has a hole 15 for discharging the liquid L to the outside. The holding member 13 is not limited to the above configuration, and may be configured to have a pipe through which the liquid L can flow, for example, and discharge the liquid L in the pipe from the hole 15.

  A support portion 16 that supports the lower surface of the plate glass G is provided on the upper surface of the holding member 13. The support portion 16 is formed in a rectangular shape and is formed of an elastic body such as rubber, for example. The material of the support portion 16 is not limited to an elastic body, and may be composed of a sponge or other contractible material. The support portion 16 has a hole 17 that communicates 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 surface processing device 3 is arranged corresponding to the processing position CP of the plate glass G set by the transport device 2. In the present embodiment, the end face processing apparatus 3 is exemplified as a grinding apparatus that chamfers the end face of the plate glass G, but is not limited thereto, and may include a polishing apparatus that polishes the end face of the plate glass G.

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

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

  Each component member 18 a to 18 d is provided with a fixing portion 24 that fixes the plate glass G to the support surface 23. The fixing part 24 is a hole formed in the support surface 23 and is connected to a vacuum pump (not shown). The fixing portion 24 sucks the plate glass G placed on the support surface 23 by the action of the vacuum pump.

  The processing tools 19a and 19b are configured by a grinding tool such as a diamond wheel. As shown in FIG. 2, the processing tools 19 a and 19 b include a processing tool 19 a that processes the end face of one side G <b> 1 and a processing tool 19 a that processes the end faces of the two sides G <b> 1 and G <b> 2 of the plate glass G. And a processing tool 19b for processing the end face. Each processing tool 19a, 19b moves linearly from one end of each side G1, G2 toward the other end while rotating (indicated by a solid line and a two-dot chain line), thereby making the end surface of the plate glass G its full length. Grind (chamfer) over. In addition, although linear movement of each processing tool 19a, 19b is performed, for example by a linear motion guide, it is not limited to this.

  As shown in FIG. 2, the positioning device 20 includes two pressing members 25a and 25b that can come into contact with the first side G1 of the rectangular plate glass G placed on the support surface 23 of the surface plate 18, and Two receiving members 26a and 26b that can abut on the second side G2 opposite to the first side G1, and a third that makes a right angle to the first side G1 and the second side G2. A pressing member 25c that can contact the side G3, and a receiving member 26c that can contact 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 surface plate 18, and the pressing members 25a to 25c and the receiving members 26a to 26c are the surface plate. 18 is disposed outside the outer peripheral edge of the support surface 23 and further outside the four sides G1 to G4 of the glass sheet 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 plate glass G when positioning the plate glass G and retract from the plate glass G when the positioning ends.

  Each of the pressing members 25a to 25c includes a circular contact pressing body 27 that contacts each corresponding side G1 and G3 of the plate glass G, and each side G1 and G3 of the plate glass G with respect to each contact pressing body 27. And an actuator 28 for applying a moving force in the orthogonal direction.

  The receiving members 26a to 26c have columnar (or cylindrical) contact receiving bodies 29 that contact the corresponding sides G2 and G4 of the glass sheet G. The contact receiving body 29 is formed of an elastic body and is supported by a biasing member 30 such as a spring or a fluid pressure cylinder. Therefore, each contact receiving body 29 is movable together with the sheet glass G while maintaining contact with the corresponding sides G2 and G4 of the sheet glass G.

  As shown in FIG. 2, the displacement sensors 21 a to 21 c include two displacement sensors 21 a that can abut on the first side G <b> 1 of the plate glass G and two that can abut on the second side G <b> 2 of the plate glass G. Displacement sensor 21b and one displacement sensor 21c capable of contacting the third side G3.

  Moreover, as shown in FIG. 2, each displacement sensor 21a-21c is a contact-type sensor, and has a contactor which can contact | abut to each edge | side G1-G3 to which the plate glass G respond | corresponds, respectively. Each displacement sensor 21a-21c can measure the amount of positional deviation of the plate glass G generated during positioning by comparing the position data measured by contacting the plate glass G with a reference value.

  The cutting device 4 has a scribe wheel such as a diamond cutter. The cutting device 4 forms scribe lines on the glass substrate by the scribe wheel, and folds the glass substrate along the scribe lines to form a plate glass G having a predetermined size.

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

  Hereinafter, the manufacturing method of the plate glass G is demonstrated, referring FIG. 5 thru | or FIG. As shown in FIG. 5, the manufacturing method of the plate 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 on the upper part of a substantially wedge-shaped cross section, and the molten glass overflowing on both sides from the overflow groove is formed along the side wall portions on both sides of the molded body. While flowing down, they are fused and integrated at the lower end of the molded body, and a single glass substrate is continuously formed. Thereby, a large-sized glass substrate with high dimensional accuracy is formed.

  In the cutting step S <b> 2, the glass substrate is cut by scribe cutting by the cutting device 4 to obtain a plate glass G having a predetermined size. In this cutting step S2, a scribe wheel is run along a planned cutting line set on the glass substrate, and a scribe line having a predetermined depth is engraved on the glass substrate along the planned cutting line. Thereafter, a bending moment is applied to the periphery of the scribe line, and the plate glass G is broken along the scribe line. A plurality of plate glasses G are obtained by this folding. Each plate glass G is sent to the end surface processing apparatus 3 in order, and an end surface processing step S3 is executed.

  The end surface processing step S <b> 3 includes a conveyance step for carrying in and out the plate glass G with respect to the end surface processing apparatus 3. In addition, as shown in FIG. 6, the end surface processing step S3 includes a plate glass G positioning step S31 by the positioning device 20, a fixing step S32 for fixing the plate glass G to the surface plate 18, and the displacement sensors 21a to 21c. A measuring step S33 for measuring the position of the end face of the steel sheet, and a grinding step S34 for chamfering the end face of the plate glass G by the processing tools 19a and 19b.

  Hereinafter, the conveyance process will be described in detail with reference to FIGS. In addition, in FIG. 7 thru | or FIG. 11, illustration of the end surface processing apparatus 3 is abbreviate | omitted for convenience of explanation.

  FIG. 7 illustrates a case where the processing of the plate glass G arranged at the processing position CP is finished and the end surface processing is performed on the plate glass G waiting at the first standby position WP1. In the state shown in FIG. 7, the guide member 11 of the lifting device 8 and the holding member 13 of the holding device 9 are in the standby position, and the transport belt 6 is stopped.

  As shown in FIG. 7, at the first standby position WP <b> 1, the plate glass G to be processed next is in a standby state in a state where it is placed on the upper part of the transport belt 6.

  At the processing position CP, the plate glass G that has been processed is placed on the support surface 23 of the surface plate 18. In this case, at the processing position CP, the upper part of the conveyor 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 adsorption of the plate glass G by the fixing portion 24 is released.

  At the second standby position WP2, the plate glass G that has already been processed by the end face processing device 3 is on standby in a state where it is placed on the upper portion of the conveyor 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 glass sheet G at the second standby position WP2 to the downstream cleaning device 5, and moves the glass sheet G at the processing position CP to the second standby position WP2. Then, the glass sheet G at the first standby position WP1 is moved to the processing position CP.

  That is, the transport process includes the movement of the plate glass G at the first standby position WP1 to the processing position CP, the movement of the plate glass G that has been processed at the processing position CP to the second standby position WP2, and the second standby position. The movement to the downstream side of the plate glass G in WP2 is simultaneously performed. Specifically, as shown in FIG. 8, the lifting device 8 raises the guide member 11 and pushes the upper part of the conveyor belt 6 upward. Thereby, the upper part of the conveyance belt 6 moves upward with elastic deformation, and lifts the plate glass G in the processing position CP. If it does so, the plate glass G will move above the process position CP (position of the plate glass G shown with a dashed-two dotted line) by this lifting.

  As a result, all of the three plate glasses G are supported by the transport belt 6 and are transported simultaneously by the transport device 2. In this state, the conveying device 2 rotates the pulley 10 of the driving device 7 to rotate the conveying belt 6 in the direction indicated by the arrow in FIG. Thereby, each plate glass G moves to the next position.

  In particular, the plate glass G that has been waiting at the first standby position WP1 is moved to a position above the support surface 23 of the surface plate 18, that is, a position above the processing position CP, by the transport belt 6. At this time, the conveying device 2 temporarily stops the rotating conveying belt 6. As described above, in the transport process, 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 disposed so as to place the plate glass G above the processing position CP. Is moved upward (lifting step) by the lifting device 8.

  Next, the lifting / lowering device 8 lowers the guide member 11 at the upper position and returns it to the standby position. As a result, the plate glass G moved from the first standby position WP1 to the processing position CP is lowered from the upper position of the surface plate 18 toward the surface plate 18 and placed on the support surface 23 as shown in FIG. Placed. When the guide member 11 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 conveyance process, when the end surface of the plate glass G is processed, the plate glass G arranged above the processing position CP is arranged at the processing position CP and the support of the plate glass G by the conveyance belt 6 is released. Therefore, it has a process (lowering process) in which a part of the conveyor belt 6 is moved below the processing position CP (the position of the support surface 23 of the surface plate 18) by the lifting device 8.

  As shown in FIG. 9, the plate glass G at the processing position in FIG. 8 has moved to the second standby position WP <b> 2, and the plate glass G at the second standby position WP <b> 2 has been transferred to the cleaning device 5. Further, as shown in FIGS. 8 and 9, a new plate glass G formed by the cutting device 4 is moving toward the end surface processing device 3.

  Before receiving the new plate glass G, the transport device 2 operates the holding device 9 and moves the holding member 13 upward from the standby position. If it does so, the support part 16 of the holding member 13 will contact the lower surface of the plate glass G in the 2nd standby position WP2, and will further push up this plate glass G upwards. Thereby, as shown in FIG. 10, the glass sheet G is in a state of being separated upward from the conveyance belt 6, that is, in a state of being positioned above the second standby position WP <b> 2.

  As described above, in the state in which the sheet glass G is disposed at the processing position CP, the conveying step is performed when the other glass sheet G is disposed at the first standby position WP1, and the sheet glass G disposed at the second standby position WP2 is used. There is a step (holding step) of holding the holding device 9 at a position above the second standby position WP2. In this holding step, the support portion 16 of the holding member 13 discharges the liquid L from the hole 17. Thereby, this liquid L will intervene between the support part 16 and the plate glass G, and generation | occurrence | production of the abrasion with respect to the plate glass G in a holding process is prevented.

  In this state, there is no plate glass G that contacts 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 plate glass G at the processing position CP. During the execution of these steps S31 to S34, the conveyance device 2 rotates the conveyance belt 6 and receives a new plate glass G from the cutting device 4, and the plate glass G is placed in the first standby position as shown in FIG. After moving to WP1, the conveyor belt 6 is stopped.

  When a new glass sheet G arrives at the first standby position WP1, the holding device 9 lowers the holding member 13 and returns it to the standby position (position indicated by a two-dot chain line in FIG. 11). As a result, the glass G is separated 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 bodies 27 of the two pressing members 25a and 25b push the first side G1 of the glass sheet G, and the contact pressing body 27 of the single pressing member 25c is the third side. G3 is pushed. As a result, the second side G2 of the glass sheet G comes into contact with the contact receiving body 29 of the two receiving members 26a and 26b, and the fourth side G4 has the contact receiving body 29 of the single receiving member 26c. (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 S <b> 32, a negative pressure is generated on the back surface side of the plate glass G through the plurality of fixing portions (holes) 24 of the surface plate 18, whereby the plate glass G is sucked and held on the support surface 23 of the surface plate 18.

  When the fixing step S32 is completed, the measuring step S33 is executed. In this measurement process S33, each displacement sensor 21a-21c contacts the end surface of each edge | side G1-G3 of the corresponding plate glass G, and measures the position (displacement). By this measurement step S33, a deviation amount from the reference position in the glass sheet G positioned in the positioning step S31 is detected.

  When this measurement process S33 is completed, the displacement sensors 21a to 21c are retracted from the glass sheet G, and the grinding process S34 is executed. In this grinding step S34, the grinding amount of each processing tool 19a, 19b is determined based on the amount of deviation of the end face of the plate glass G measured by each displacement sensor 21a-21c. Each processing tool 19a, 19b grinds the end face based on the grinding amount determined by the displacement sensors 21a-21c. Each processing tool 19a, 19b grinds the end face 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 grinding the end faces relating to the two sides G1 and G2 of the rectangular plate glass G, the plate glass G is rotated by 90 ° in the horizontal direction to change its posture, and the remaining two Although the end faces related to the sides G3 and G4 are ground, this process is not shown. Further, after the grinding process S34 is performed, a corner cutting process (not shown) of the plate glass G may be performed, but the present invention is not limited to this.

  When the grinding process S34 is completed, a cleaning process S4 is performed. In the cleaning step S4, the plate glass G for which the end face processing has been finished is transferred to the cleaning device 5, and the cleaning liquid is supplied by the supply device, and the surface of the plate glass G is cleaned by the cleaning head. The plate 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 transfer belt 6 and part of the transfer belt 6 is moved up and down to transfer the plate glass G. Can be performed efficiently.

  That is, when the glass sheet G is moved 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 lifting device 8 (lifting process). Thereby, the plate glass G moves above the processing position CP by the transport belt 6 without contacting the surface plate 18 of the end face processing apparatus 3.

  Further, the glass sheet G is placed on the support surface 23 of the surface plate 18, that is, the processing position CP by moving a part of the raised conveyor belt 6 downward. At this time, the conveyor belt 6 is moved further below the support surface 23 of the surface plate 18 that is the machining position CP by the lifting device 8 (lowering process), and is separated from the plate glass G at the machining position CP.

  By separating the conveying belt 6 from the plate glass G, it is possible to run without contacting the plate glass G. Therefore, a new unprocessed sheet glass G can be conveyed to the first standby position WP1 by running the conveyor belt 6 while the sheet glass G is disposed at the processing position CP.

  In the holding step (see FIGS. 10 and 11), the plate glass G is conveyed from the processing position CP to the second standby position WP2, and the plate glass G supported by the conveyance belt 6 is held by the holding device 9 in the second standby position. Hold above WP2. Thereby, the plate glass G is separated from the conveyance belt 6 and can rotate without contacting the plate glass G.

  That is, the transport belt 6 passes through the lowering process and the holding process, and the first unprocessed sheet glass G is first contacted without contacting the sheet glass G processed at the processing position CP and the processed sheet glass G. It can be arranged at the standby position WP1. For this reason, it becomes possible to arrange | position the new plate glass G in 1st standby position WP1, processing the end surface of the plate glass G in the process position CP by the end surface processing apparatus 3. FIG.

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

  In addition, this invention is not limited to the structure of the said embodiment, It is not limited to an above-described effect. The present invention can be variously modified without departing from the gist of the present invention.

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

DESCRIPTION OF SYMBOLS 1 Manufacturing apparatus 2 Conveying apparatus 3 End surface processing apparatus 6 Conveying belt 8 Lifting apparatus 9 Holding apparatus 11 Guide member 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 Fixed portion CP Processing position
G Sheet glass S3 End surface processing step S31 Positioning step S32 Fixing step S33 Measuring step WP1 First standby position
WP2 second standby position

Claims (9)

In the manufacturing method of the plate glass provided with the end surface processing process which processes the end surface of plate glass with an end surface processing apparatus,
The end surface processing step transports the plate glass in a predetermined transport direction, and moves the plate glass to a first standby position by a transport belt and a processing position provided downstream of the first standby position in the transport direction. It has a transport process to move,
The conveying step is
When moving the plate glass from the first standby position to the processing position, an ascending step of moving a part of the transport belt upward by an elevating device so as to place the plate glass above the processing position;
When processing the end surface of the plate glass by the end surface processing apparatus, the plate glass disposed above the processing position is disposed at the processing position, and the transport belt is spaced apart from the plate glass. A lowering step of moving the part of the conveyor belt moved to a position below the processing position by the lifting device;
While the end surface of the plate glass disposed at the processing position is processed by the end surface processing apparatus, the other belt glass is moved to the first standby position by running the transport belt moved below the processing position. A process of arranging in
The manufacturing method of the plate glass characterized by including. The conveying step is configured to move the plate glass whose end face processing is finished to a second standby position provided on the downstream side in the conveying direction from the processing position by the conveying belt,
The second standby position is provided with a holding device that holds the plate glass in a state where the plate glass is separated from the transport belt,
In the conveying step, when the other glass sheet is disposed at the first standby position in a state where the glass sheet is disposed at the processing position, the sheet glass at the second standby position is moved by the holding device. The manufacturing method of the plate glass of Claim 1 further equipped with the holding process hold | maintained above 2 stand-by positions.   The transport step includes the movement of the plate glass at the first standby position to the processing position, the movement of the plate glass that has been processed at the processing position to the second standby position, and the second standby position. The manufacturing method of the plate glass of Claim 1 or 2 which simultaneously performs the movement to the downstream of the said plate glass in a.   The said raising / lowering apparatus is a manufacturing method of the plate glass of any one of Claim 1 to 3 provided with the guide member which can be moved to an up-down direction while guiding the said conveyance belt in the said conveyance direction. The end face processing device includes a surface plate on which the plate glass is placed and a fixing plate that fixes the plate glass, a positioning device that positions the plate glass, and a displacement sensor that measures the position of the end face of the plate glass. And comprising
The end surface processing step includes a positioning step of the plate glass by the positioning device, a fixing step of fixing the plate glass to the support surface by the fixing portion, and a measuring step of measuring the position of the end surface of the plate glass by the displacement sensor, The manufacturing method of the plate glass of any one of Claim 1 to 4 provided with these. The plate glass is configured in a rectangular shape,
The said measurement process is a manufacturing method of the plate glass of Claim 5 which measures the position of the said end surface which concerns on the two sides which the said plate glass opposes with the said displacement sensor. The platen according to claim 5 or 6, wherein the surface plate is configured by being divided into a plurality of constituent members, and a travel path of the transport belt is formed between the constituent members. In the manufacturing apparatus of plate glass provided with the conveying apparatus which conveys plate glass to a predetermined conveyance direction, and the end surface processing apparatus which processes the end surface of the said plate glass,
The transport device includes a transport belt that transports the plate glass, and a lifting device that lifts and lowers a part of the transport belt,
The transport belt is configured to move the plate 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 the plate glass is moved from the first standby position to the processing position, a part of the conveyor belt is moved upward by an elevating device to arrange the plate glass above the processing position,
When the end surface of the plate glass is processed by the end surface processing apparatus, the plate glass disposed above the processing position is disposed at the processing position, and the support of the plate glass by the conveyor belt is to be released. A part of the conveyor belt moved upward is moved below the processing position by the lifting device;
While the end surface of the plate glass disposed at the processing position is processed by the end surface processing apparatus, the other belt glass is moved to the first standby position by running the transport belt moved below the processing position. An apparatus for producing plate glass, characterized in that the apparatus is configured to be disposed on a plate. The transport belt is configured to move the plate glass whose end face processing has been completed to a second standby position provided downstream of the processing position in the transport direction,
The transport device includes a holding device that holds the plate glass in the second standby position in a state where the plate glass is separated from the transport belt,
When the other glass plate is disposed at the first standby position in a state where the glass sheet is disposed at the processing position, the holding device moves the glass sheet at the second standby position to the second standby position. The plate glass manufacturing apparatus according to claim 8, configured to be held upward.

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