JP2017205812A - Manufacturing method of plate glass - Google Patents

Abstract

PROBLEM TO BE SOLVED: To clean a surface plate so as not to leave foreign matters, and efficiently manufacture a plate glass.SOLUTION: A method includes an end surface processing process S3 of processing an end surface of a plate glass G by an end surface processing device 3 having a surface plate 16 for fixing the plate glass G and processing tools 17a, 17b, and a conveyance process of carrying in or out the plate glass G to the surface plate 16 by a conveyance device 2 along a predetermined conveyance direction. The end surface processing process S3 includes a surface plate cleaning process S36 of cleaning the surface plate 16 by a surface plate cleaning device 10 arranged in an upward position of the surface plate 16. In the surface plate cleaning process S36, the plate glass G is carried out after end surface processing of the plate glass G fixed on the surface plate 16 by the processing tools 17a, 17b is finished, and the surface plate 16 is cleaned by the surface plate cleaning device 20 before a new plate glass G to be processed is fixed on the surface plate 16.SELECTED DRAWING: Figure 1

Description

    The present invention relates to a method for producing a plate glass whose end face is processed.

  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 disclosed in Patent Document 1, as a sheet glass manufacturing apparatus, a cutting machine that puts a cutting line (scribe line) into a glass ribbon formed into a strip shape, and a folding machine that folds the glass ribbon along the cutting line And a chamfering device that grinds the end face of the sheet glass formed after the folding.

  The chamfering apparatus in this manufacturing apparatus includes a surface plate (table) that can suck plate glass, a laser displacement meter that measures the position of the end surface of the plate glass, and a chamfering grindstone. The chamfering device acquires the position information of the end face of the plate glass that is sucked and fixed to the surface plate by a laser displacement meter (non-contact sensor), and executes position control of the chamfering grindstone based on the position information. Thereby, the chamfering device can perform chamfering without positioning the plate glass.

JP 2011-110648 A

  A chamfering device in a conventional manufacturing apparatus processes an end surface with a chamfering grindstone in a state where a plate glass is adsorbed and fixed to a surface plate, but foreign matters such as glass powder generated by the chamfering processing remain on the surface plate. There is a case. In such a case, when a new plate glass is fixed to the surface plate so as to be chamfered, the foreign matter may adhere to the plate glass, damage the plate glass, and reduce the quality of the product.

  This invention is made | formed in view of said situation, and makes it a technical subject to wash | clean a surface plate and to manufacture a plate glass efficiently so that a foreign material may not remain.

  The present invention is for solving the above-mentioned problems, and an end face processing step for processing the end face of the plate glass by a face plate processing apparatus including a surface plate for fixing the plate glass and a processing tool, and a predetermined transport direction. And a conveying step of carrying the plate glass into and out of the surface plate by a conveying device, wherein the end surface processing step is performed at a fixed position disposed above the surface plate. A platen washing step of washing the platen with a platen washing device, the platen washing step after the end surface processing by the processing tool is completed on the plate glass fixed to the platen The platen is carried out by the platen washing device until the platen glass is unloaded from the platen and a new plate glass for processing is carried in and fixed on the platen.

  As described above, the surface plate cleaning process is performed by the surface plate cleaning apparatus during the period from the time when the processed plate glass is unloaded from the surface plate and a new plate glass for processing is fixed to the surface plate. Thereby, since a surface plate can be wash | cleaned without inhibiting an end surface processing process, the tact time which concerns on manufacture of plate glass is not prolonged. Therefore, it is possible to manufacture plate glass efficiently.

  In the plate glass manufacturing method according to the present invention, the surface plate cleaning device includes a nozzle that discharges a cleaning liquid toward the surface plate, and a cleaning brush that can contact the surface plate, and the surface plate cleaning step includes: The cleaning brush is moved in contact with the surface plate while rotating, and the surface plate is cleaned by moving the cleaning liquid together with the cleaning brush while discharging the cleaning liquid onto the surface plate by the nozzle, and after the cleaning, It is desirable to retract the cleaning brush from the surface plate.

  According to this, in the surface plate cleaning process, the cleaning brush is brought into contact with the surface plate and moved while rotating to separate foreign matter adhering to the surface plate, and the cleaning liquid is discharged from the nozzle toward the surface plate. By this, this foreign material can be washed away reliably. Further, in the surface plate cleaning process, the cleaning brush is retracted from the surface plate after the cleaning is completed, so that the cleaning brush does not get in the way when a new plate glass is carried into the surface plate.

  In the manufacturing method of the plate glass which concerns on this invention, it is desirable for the said nozzle to discharge a washing | cleaning liquid to the upper surface of the said plate glass, before processing the said plate glass with the said processing tool. Thereby, while being able to wash away the foreign material already adhering to plate glass, it can prevent that glass powder generated by processing with a processing tool adheres to the upper surface of plate glass.

  In the manufacturing method of the plate glass which concerns on this invention, the said processing tool may be comprised so that the end surface of the said plate glass may be processed, moving along the direction opposite to the said conveyance direction of the said plate glass. Thereby, the end surface of plate glass can be processed efficiently.

  In the manufacturing method of the plate glass which concerns on this invention, it is desirable for the said washing | cleaning brush to rotate to the direction opposite to the said conveyance direction while moving to the same direction as the said conveyance direction of the said plate glass. Thereby, the surface plate can be cleaned efficiently.

  In the manufacturing method of the plate glass which concerns on this invention, the said surface plate is comprised by the some structural member, The said conveying apparatus is provided with the conveyance belt arrange | positioned between the said some structural member, The said washing brush is Further, it may be configured to contact only the component member without contacting the conveyor belt. By bringing the cleaning brush into contact with only the surface plate in this way, the surface plate can be cleaned quickly and reliably without obstructing the transport process.

  According to the present invention, it is possible to clean the platen so that no foreign matter remains and to manufacture the plate glass efficiently.

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

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. FIG. 1 thru | or FIG. 13 shows one Embodiment of the manufacturing method and manufacturing apparatus of the plate glass which concern on this invention.

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

  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. As shown in FIG. 1, the transport device 2 includes a first standby position WP1 and a processing position CP that performs processing by the end face processing device 3 on the downstream side of the first standby position WP1 in the process of transporting the plate glass G. The plate glass G is moved to the second standby position WP2 for waiting the plate glass G on the downstream side of the position CP. Moreover, the conveyance apparatus 2 stops the plate glass G in each position WP1, CP, WP2 in conjunction with a sensor (not shown).

  The conveyance device 2 includes a plurality of conveyance belts 6 that convey the plate glass G, a driving device 7 for the conveyance belt 6, a lifting device 8 that moves a part of the conveyance belt 6 up and down, and a holding device that holds the plate glass G in a predetermined position. Device 9.

  The conveyor belt 6 is configured endlessly by rubber or another elastic body, and is driven by the driving device 7 to move the plate glass G placed on the upper portion thereof. 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. Each conveyor belt 6 is arranged at equal intervals.

  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. The guide member 11 can be made of, for example, a synthetic resin. As shown in FIG. 2, the guide member 11 has a groove 11 a that guides the conveyance belt 6. 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 rod-shaped 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. The holding member 13 is filled with water or other liquids, but is not limited thereto, and may be filled with a gas-liquid mixed fluid formed by mixing a gas and a liquid. The holding member 13 has a hole 15 for discharging this liquid to the outside.

  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 16 on which the plate glass G is placed, processing tools 17a and 17b, a positioning device 18 that positions the plate glass G, and displacement sensors 19a to 19c that measure the position of the end surface of the plate glass G. And a surface plate cleaning device 20 for cleaning the surface plate 16.

  The surface plate 16 is divided into a plurality of (four in the illustrated example) component members 16a to 16d. As shown in FIGS. 2 to 4, the constituent members 16 a to 16 d are formed in a long shape and are arranged in parallel at a constant interval. Thereby, a space (running path) through which the conveyor belt 6 can pass is formed between the constituent members 16a to 16d.

  Each of the constituent members 16a to 16d is a rod-like member configured in a hollow shape. Each of the constituent members 16a to 16d is filled with a gas-liquid mixed fluid ML obtained by mixing a gas (for example, air) and a liquid (for example, water). Moreover, the support part 21 which supports the lower surface of the plate glass G is provided in the upper surface of each structural member 16a-16d. The support portion 21 is formed in an elongated shape and is formed of an elastic body such as rubber. The support part 21 has the hole 22 which discharges the gas-liquid mixed fluid ML with which each structural member 16a-16d is filled. Moreover, the through-hole 23 which penetrates inside and outside this structural member 16a-16d is formed in the upper surface of each structural member 16a-16d.

  A suction device and a pressure feeding device (not shown) are connected to the constituent members 16a to 16d. Due to the action of the suction device, the constituent members 16 a to 16 d adsorb the plate glass G placed on the support portion 21 through the holes 22 and the through holes 23 of the support portion 21. That is, the hole 22 and the through hole 23 according to each of the constituent members 16 a to 16 d function as a fixing portion that fixes the plate glass G to the support portion 21. Moreover, the hole 22 and the through-hole 23 discharge the gas-liquid mixed fluid ML with which the inside of structural member 16a-16d is filled to the support part 21 side by the effect | action of a pumping apparatus.

  The processing tools 17a and 17b are constituted by a grinding tool (grinding stone) such as a diamond wheel. As shown in FIG. 2, the processing tools 17 a and 17 b include a processing tool 17 a that processes the end face of one side G <b> 1 and a processing tool 17 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 17b for processing the end face. Each processing tool 17a, 17b moves linearly from one end of each side G1, G2 to the other end while rotating (indicated by a solid line and a two-dot chain line), thereby each side G1, G1 of the glass sheet G. The end face in G2 is ground (chamfered) over its entire length. In addition, although linear movement of each processing tool 17a, 17b is performed, for example with a linear motion guide, it is not limited to this.

  As shown in FIG. 2, the positioning device 18 includes two pressing members 24a and 24b that can come into contact with the first side G1 of the rectangular plate glass G placed on the support portion 21 of the surface plate 16, and Two receiving members 25a and 25b 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 24c capable of contacting the side G3, and a receiving member 25c capable of contacting the fourth side G4 facing the third side G3.

  In this case, the sides G1 to G4 of the plate glass G are located outside the outer peripheral edge of the surface plate 16, and the pressing members 24a to 24c and the receiving members 25a to 25c are outside the surface plate 16. It is arranged outside the periphery, and further outside the four sides G1 to G4 of the plate glass G. Accordingly, the glass sheet G is supported at three points by a total of three receiving members 25a to 25c, and is also supported at three points by a total of three pressing members 24a to 24c.

  The pressing members 24a to 24c and the receiving members 25a to 25c 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 24a to 24c includes a circular contact pressing body 26 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 26. And an actuator 27 for applying a moving force in the orthogonal direction.

  The receiving members 25a to 25c have a columnar (or cylindrical) contact receiving body 28 that contacts the corresponding sides G2 and G4 of the plate glass G. The contact receiving body 28 is made of an elastic body and is supported by a biasing member 29 such as a spring or a fluid pressure cylinder. Therefore, each contact receiving body 28 is movable together with the plate glass G while maintaining the contact with the corresponding sides G2 and G4 of the plate glass G.

  As shown in FIG. 2, the displacement sensors 19 a to 19 c include two displacement sensors 19 a that can come into contact with the first side G <b> 1 of the plate glass G and two pieces that can come into contact with the second side G <b> 2 of the plate glass G. Displacement sensor 19b, and one displacement sensor 19c that can come into contact with the third side G3.

  Moreover, as shown in FIG. 2, each displacement sensor 19a-19c 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 19a-19c can measure the amount of positional deviation of the plate glass G generated during positioning by comparing the position data measured in contact with the plate glass G and the reference value.

  As shown in FIG. 1, the surface plate cleaning device 20 is disposed above the surface plate 16. The surface plate cleaning device 20 includes a plurality of shower nozzles 30 that discharge a cleaning liquid and a plurality of cleaning brushes 31 that can come into contact with the surface plate 16. The number of shower nozzles 30 is the same as the number of constituent members 16a to 16d so that the cleaning liquid is individually discharged to the constituent members 16a to 16d of the surface plate 16. Similarly, the number of cleaning brushes 31 is four, which is the same as the number of component members 16a to 16d. The shower nozzles 30 and the cleaning brushes 31 are spaced apart from each other at a predetermined interval, similarly to the constituent members 16 a to 16 d of the surface plate 16.

  The shower nozzle 30 is configured to reciprocate in the conveyance direction X of the glass sheet G and the opposite direction (hereinafter referred to as “anti-conveyance direction”) XR by a moving mechanism (not shown). Each shower nozzle 30 is disposed above the constituent members 16a to 16d of the surface plate 16 so as to face downward, and is configured to discharge a cleaning liquid composed of a liquid or a gas-liquid mixed fluid downward.

  As with the shower nozzle 30, the cleaning brush 31 is configured to reciprocate in the transport direction X and the reverse transport direction XR of the plate glass G by a moving mechanism. The cleaning brush 31 is moved at the same speed as the shower nozzle 30 is moved. The cleaning brush 31 is configured to move in the vertical direction by an actuator 32. That is, the cleaning brush 31 is configured to be changeable between a retracted position above the surface plate 16 and a cleaning position that descends from the retracted position and contacts the support portion 21 related to the constituent members 16a to 16d of the surface plate 16. Is done. The cleaning brush 31 is driven to rotate by a motor (not shown).

  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, a method for manufacturing the glass sheet G using the manufacturing apparatus 1 will be described. As shown in FIG. 5, the manufacturing method of the plate glass G according to the present embodiment includes a forming step S1, a cutting step S2, an end face processing step S3, and a cleaning step S4. In addition, this method includes a conveying step of moving 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.

  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 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.

  The plate glass G obtained by cutting process S2 is conveyed from the cutting device 4 to the end surface processing apparatus 3 by a conveyance process. Specifically, the sheet glass G temporarily kept at the first standby position WP <b> 1 by the transport device 2 is carried into the processing position CP set with respect to the surface plate 16 of the end face processing device 3. When the processing by the end face processing device 3 is completed, the plate glass G is unloaded from the surface plate 16, moved to the second standby position WP2, and temporarily held.

  As shown in FIG. 6, the end surface processing step S <b> 3 includes a positioning step S <b> 31 of the plate glass G by the positioning device 18, a fixing step S <b> 32 for fixing the plate glass G to the surface plate 16, and the end surfaces of the plate glass G by the displacement sensors 19 a to 19 c. A measuring step S33 for measuring the position of the plate glass, a plate glass cleaning step S34 for cleaning the upper surface of the plate glass G fixed to the surface plate 16, and a grinding step S35 for chamfering the end surface of the plate glass G by the processing tools 17a and 17b. And a platen washing step S36 for washing the support portion 21 of the platen 16.

  Hereinafter, the end face processing step S3 will be described in detail with reference to FIGS. FIG. 7 shows a state immediately before starting the processing of the glass sheet G arranged at the processing position CP. As shown in FIG. 7, at the second standby position WP2, the plate glass G that has already been processed is on standby. Further, a new plate glass G cut by the cutting device 4 is moving toward the transport device 2.

  In this state, the manufacturing apparatus 1 waits for the glass sheet G at the second standby position WP2 while receiving the new glass sheet G from the cutting device 4 by the transport device 2 and is at the processing position CP by the end face processing device 3. The plate glass G is processed.

  At this time, as shown in FIG. 8, the transport device 2 starts the holding device 9. The holding member 13 of the holding device 9 is lifted by the operation of the actuator 14 and lifts the plate glass G supported by the transport belt 6. Thereby, the plate glass G will be in the state spaced apart from the conveyance belt 6, ie, the state located above 2nd standby position WP2.

  Thus, in the transporting process, when another plate glass G is arranged at the first standby position WP1 in a state where the plate glass G is arranged at the processing position CP, the plate glass G arranged at the second standby position WP2 is used. It is held at a position above the second standby position WP2 by the holding device 9 (holding step). At this time, the holding member 13 discharges liquid from the hole 15. Thereby, this liquid intervenes between the holding member 13 and the plate glass G, and the generation of scratches on the plate glass G in the holding step is prevented.

  Next, the transport device 2 starts the transport belt 6 and receives a new plate glass G from the cutting device 4. As shown in FIG. 9, the transport device 2 stops the transport belt 6 after moving the plate glass G to the first standby position WP1. Note that the glass sheet G held above the second standby position WP2 does not move when the transport belt 6 is started.

  While the conveying device 2 operates as described above, the end surface processing device 3 starts processing the end surface of the plate glass G at the processing position CP. Specifically, a positioning step S31, a fixing step S32, a measuring step S33, a plate glass cleaning step S34, a grinding step S35, and a surface plate cleaning step S36 are sequentially executed.

  In the positioning step S31, the contact pressing bodies 26 of the two pressing members 24a and 24b push the first side G1 of the glass sheet G, and the contact pressing body 26 of one pressing member 24c 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 28 of the two receiving members 25a and 25b, and the fourth side G4 has the contact receiving body 28 of the single receiving member 25c. (See FIG. 2). Thereby, the plate glass G is positioned with respect to the surface plate 16.

  When the positioning step S31 is completed, the positioning device 18 is retracted from the plate glass G, and the fixing step S32 is executed. In the fixing step S <b> 32, a negative pressure is generated on the back side of the plate glass G through the holes 22 and 23 of the surface plate 16 by the suction device, and thereby the plate glass G is sucked and held on the support portion 21 of the surface plate 16.

  When the fixing step S32 is completed, the measuring step S33 is executed. In this measurement process S33, each displacement sensor 19a-19c 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 step S33 is completed, the displacement sensors 19a to 19c are retracted from the plate glass G, and the plate glass cleaning step S34 is executed. In the plate glass cleaning step S34, as shown in FIGS. 3 and 7 to 9, the shower nozzle 30 stopped on the downstream side of the plate glass G is moved along the counter-transport direction XR, and the shower nozzle 30 is moved. Then, the cleaning liquid is discharged to the plate glass G located below. The shower nozzle 30 injects the cleaning liquid onto the glass sheet G before the grinding process S35 by the processing tools 17a and 17b is started.

  Thereby, the foreign material adhering to the upper surface of the plate glass G in cutting process S2 can be removed. Furthermore, since the cleaning liquid remains on the upper surface of the plate glass G, glass powder generated from the plate glass G in the subsequent grinding step S35 is prevented from adhering to the upper surface of the plate glass G. The cleaning brush 31 passes above the plate glass G along the counter-transport direction XR together with the shower nozzle 30 without rotating.

  As shown in FIG. 9, when the cleaning liquid is sprayed onto the plate glass G in the range from the downstream end of the plate glass G to the upstream end, the shower nozzle 30 stops the discharge of the cleaning liquid and is put together with the cleaning brush 31 on the spot. And wait.

  In the grinding step S35, the grinding amount of each processing tool 17a, 17b is determined based on the amount of deviation of the end face of the plate glass G measured by each displacement sensor 19a-19c. Each processing tool 17a, 17b grinds the end face based on the determined grinding amount. Each processing tool 17a, 17b grinds the end face from one end of the first side G1 and the second side G2 to the other end.

  Each processing tool 17a, 17b moves along the counter-transport direction XR so as to follow the shower nozzle 30 while the shower nozzle 30 of the surface plate cleaning device 20 moves, and grinds the end surface of the plate glass G. In this case, the moving speed of each processing tool 17a, 17b is equal to or lower than the moving speed of the shower nozzle 30, and the processing tools 17a, 17b do not pass the shower nozzle 30. Thus, by starting the grinding process S35 during the movement of the shower nozzle 30, the tact time relating to the production of the plate glass G can be shortened.

  Each processing tool 17a, 17b returns to the standby position on the one end portion side of the plate glass G in preparation for the next grinding processing after grinding the end face from one end portion to the other end portion of the plate glass G. At the end of processing, a new plate glass G has arrived at the first standby position WP1 by the transport process. When this plate glass G arrives, the holding device 9 returns the held plate glass G to the transport belt 6. That is, 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. 9). As a result, the glass sheet G is separated from the holding member 13 and is again disposed at the second standby position WP2 on the transport belt 6.

  When the grinding process S35 is completed, the sheet glass G is simultaneously conveyed by the conveying device 2. When transporting the plate glass G, the end surface processing device 3 operates the pressure feeding device to discharge the gas-liquid mixed fluid ML from the holes 22 and 23 of the constituent members 16a to 16d in the surface plate 16, thereby adsorbing and fixing the plate glass G. Is released.

  Thereafter, as shown in FIG. 10, the guide member 11 in the lifting device 8 of the transport device 2 is raised. Thereby, the conveyor belt 6 moves above the support portion 21 of the surface plate 16 and lifts the plate glass G. Accordingly, the plate glass G is separated from the support portion 21 of the surface plate 16 and is positioned above the processing position CP.

  In this state, the conveyance device 2 starts the conveyance belt 6 and simultaneously conveys the plate glasses G along the conveyance direction X to the downstream side. That is, the plate glass G that has been waiting at the second standby position WP2 is moved to the cleaning device 5, the plate glass G that has been processed at the processing position CP is moved to the second standby position WP2, and the first standby position is reached. The plate glass G waiting at WP1 is moved to the processing position CP.

  The platen cleaning step S36 is started during the movement of these plate glasses G. As shown in FIGS. 10 and 11, the surface plate cleaning device 20 operates the actuator 32 to lower the cleaning brush 31. Each cleaning brush 31 comes into contact with the support portion 21 of the corresponding component 16a to 16d of the surface plate 16. Moreover, the cleaning brush 31 starts rotating by being driven by the motor.

  In this case, the cleaning brush 31 and the conveyor belt 6 overlap in a side view (see FIG. 10), but the cleaning brushes 31 are arranged at intervals so as not to contact the conveyor belt 6. For this reason, each cleaning brush 31 contacts only the support part 21 of each structural member 16a-16d (refer FIG. 11).

  At this time, the glass sheet G at the processing position CP has started to move to the second standby position WP2, and the cleaning brush 31 and the shower nozzle 30 move along the transport direction X so as to follow the glass sheet G. To start. The shower nozzle 30 and the cleaning brush 31 move to the downstream side at substantially the same speed as the conveying speed of the sheet glass G on the conveying belt 6 by the operation of the moving mechanism. Thus, by cleaning the surface plate 16 while conveying the plate glass G, the tact time for manufacturing the plate glass G can be shortened as much as possible.

  The cleaning brush 31 cleans the support portion 21 of the surface plate 16 while rotating in a direction opposite to the moving direction. That is, as shown in FIG. 12, the cleaning brush 31 moving in the right direction (conveying direction X) toward the paper surface rotates counterclockwise (counterclockwise). By such rotation, the cleaning brush 31 can reliably separate foreign substances such as glass powder attached to the support portion 21 of the surface plate 16.

  In the surface plate cleaning step S <b> 36, cleaning with the cleaning brush 31 is performed while discharging the gas-liquid mixed fluid ML to the support portion 21 from the holes 22 and 23 in the constituent members 16 a to 16 d of the surface plate 16. By doing in this way, it becomes easy to isolate | separate the foreign material adhering to the support part 21 of the surface plate 16. FIG. Moreover, in the surface plate washing | cleaning process S36, the washing brush 31 precedes and the shower nozzle 30 moves at the same speed so that it may follow. Thereby, immediately after the foreign matter adhering to the support part 21 of each structural member 16a-16d is isolate | separated by the cleaning brush 31, it can wash away reliably with the cleaning liquid of the shower nozzle 30.

  As shown in FIG. 13, when the cleaning brush 31 finishes cleaning the support portions 21 of the constituent members 16 a to 16 d related to the surface plate 16, the cleaning brush 31 is raised by the operation of the actuator 32 in the surface plate cleaning device 20, and the standby position ( Return to the position indicated by the two-dot chain line. Further, the shower nozzle 30 is stopped together with the cleaning brush 31, and the discharge of the cleaning liquid is also stopped. Thus, the surface plate cleaning step S36 is completed.

  At the end of the surface plate cleaning step S36, the plate glass G that has been waiting at the first standby position WP1 arrives at the processing position CP. As shown by a two-dot chain line in FIG. 13, the plate glass G is disposed above the surface plate 16 while being supported by the conveyor belt 6. Thereafter, the lifting device 8 lowers the guide member 11 located at the upper position and returns it to the standby position. Thereby, the plate glass G descend | falls from the upper position of the surface plate 16 toward this surface plate 16, and is mounted in the support part 21 (processing position CP). When the guide member 11 returns to the standby position, the conveyor belt 6 moves below the support portion 21 of the surface plate 16. As described above, the state returns to the state shown in FIG. 7, and the above operation is repeated thereafter.

  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 S35 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 end face processing step S3 is completed, a cleaning step 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 plate glass G manufacturing method and manufacturing apparatus 1 according to the present embodiment described above, the foreign matter adhering to the surface plate 16 can be removed by bringing the cleaning brush 31 into contact with the surface plate 16 in the surface plate cleaning step S36. The foreign matter can be washed away by separating and discharging the cleaning liquid from the shower nozzle 30 toward the surface plate 16. In this way, the foreign matter adhering to the surface plate 16 can be reliably removed by spraying the cleaning liquid from the cleaning brush 31 and the shower nozzle 30.

  Further, in the surface plate cleaning step S <b> 36, the processing is performed until the plate glass G whose end face processing has been completed is carried out from the surface plate 16 and a new plate glass G for processing is fixed to the surface plate 16. Thereby, since the surface plate 16 can be washed without hindering the end face processing step S3, the tact time relating to the production of the plate glass G is not prolonged. Therefore, it is possible to manufacture the plate glass G efficiently. Further, when the cleaning with the cleaning brush 31 is completed, the cleaning brush 31 is retracted upward from the surface plate 16, and therefore the cleaning brush 31 does not interfere with the conveyance of the plate glass G.

  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 embodiment, the example in which the surface plate 16 is cleaned by the surface plate cleaning device 20 including the shower nozzle 30 and the cleaning brush 31 is shown, but the present invention is not limited to this. The surface plate 16 may be cleaned by the surface plate cleaning device 20 having only the shower nozzle 30, or the surface plate 16 may be cleaned by the surface plate cleaning device 20 having only the cleaning brush 31. In the above embodiment, the example in which the surface plate 16 is cleaned by rotating the cleaning brush 31 has been described. However, the present invention is not limited to this, and the surface plate 16 is vibrated without rotating the cleaning brush 31. You may make it wash | clean.

2 Conveying device 3 End face processing device 6 Conveying belt 16 Surface plate 16a Surface plate component 16b Surface plate component 16c Surface plate component 16d Surface plate component 17a Processing tool 17b Processing tool 20 Surface plate cleaning device 30 Shower Nozzle 31 Cleaning brush G Sheet glass S3 End face processing step S36 Surface plate cleaning step

Claims (6)

An end face processing device for processing the end face of the plate glass by an end face processing device including a surface plate for fixing the plate glass and a processing tool, and the plate glass with respect to the surface plate by a transport device along a predetermined transport direction. A plate glass manufacturing method comprising a carrying step of carrying in or carrying out,
The end face processing step includes a surface plate cleaning step of cleaning the surface plate by a surface plate cleaning device disposed above the surface plate,
In the surface plate cleaning step, after the end surface processing by the processing tool is completed on the plate glass fixed to the surface plate, the plate glass is unloaded from the surface plate by the conveying device, and a new plate glass for processing The platen is washed by the platen washing apparatus until the platen is carried in and fixed to the platen. The surface plate cleaning device includes a nozzle that discharges a cleaning liquid toward the surface plate, and a cleaning brush that can contact the surface plate.
The surface plate cleaning step moves the surface plate by moving the cleaning brush together with the cleaning brush while discharging the cleaning liquid onto the surface plate by the nozzle while rotating the cleaning brush while contacting the surface plate. The manufacturing method of the plate glass of Claim 1 which wash | cleans and the said cleaning brush is evacuated from the said surface plate after washing | cleaning.   The said nozzle is a manufacturing method of the plate glass of Claim 2 which discharges a washing | cleaning liquid to the upper surface of the said plate glass, before processing the said plate glass with the said processing tool.   The said processing tool is a manufacturing of the plate glass of any one of Claim 1 to 3 comprised so that the end surface of the said plate glass may be processed, moving along the direction opposite to the said conveyance direction of the said plate glass. Method.   The said cleaning brush is a manufacturing method of the plate glass of Claim 2 or 3 while rotating to the direction opposite to the said conveyance direction while moving to the same direction as the said conveyance direction of the said plate glass. The surface plate is composed of a plurality of constituent members,
The transport device includes a transport belt disposed between the plurality of constituent members,
The said cleaning brush is a manufacturing method of the plate glass of any one of Claim 2, 3 and 5 comprised so that it may contact only the said structural member, without contacting the said conveyance belt.

Images