WO2017150266A1 - Facility for manufacturing glass sheet and method for manufacturing glass sheet - Google Patents

Facility for manufacturing glass sheet and method for manufacturing glass sheet Download PDF

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Publication number
WO2017150266A1
WO2017150266A1 PCT/JP2017/006287 JP2017006287W WO2017150266A1 WO 2017150266 A1 WO2017150266 A1 WO 2017150266A1 JP 2017006287 W JP2017006287 W JP 2017006287W WO 2017150266 A1 WO2017150266 A1 WO 2017150266A1
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WO
WIPO (PCT)
Prior art keywords
furnace
annealing furnace
glass
glass ribbon
glass plate
Prior art date
Application number
PCT/JP2017/006287
Other languages
French (fr)
Japanese (ja)
Inventor
将夫 塚田
松井　浩之
栄 鵜野
敏幸 布施
Original Assignee
日本電気硝子株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 日本電気硝子株式会社 filed Critical 日本電気硝子株式会社
Priority to CN201780013942.5A priority Critical patent/CN108698877B/en
Priority to KR1020187027970A priority patent/KR102132982B1/en
Publication of WO2017150266A1 publication Critical patent/WO2017150266A1/en

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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
    • C03B17/06—Forming glass sheets
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
    • C03B17/06—Forming glass sheets
    • C03B17/064—Forming glass sheets by the overflow downdraw fusion process; Isopipes therefor
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B25/00—Annealing glass products
    • C03B25/04—Annealing glass products in a continuous way
    • C03B25/10—Annealing glass products in a continuous way with vertical displacement of the glass products
    • C03B25/12—Annealing glass products in a continuous way with vertical displacement of the glass products of glass sheets
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B33/00—Severing cooled glass
    • C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
    • Y02P40/57—Improving the yield, e-g- reduction of reject rates

Definitions

  • the present invention relates to a technology for glass plate manufacturing equipment and a method for manufacturing a glass plate by a downdraw method.
  • Patent Documents 1 and 2 have been developed as techniques for preventing foreign matter from adhering to the surface of a glass plate.
  • a cutting chamber that is a space for manufacturing a glass substrate by cutting a glass ribbon into a predetermined size, and a waste glass provided below the cutting chamber
  • a recovery chamber which is a space for recovering the substrate, and the pressure in the recovery chamber is set lower than the pressure in the cutting chamber.
  • a glass ribbon cutting space that is a space for cutting a glass ribbon and an ear portion that is a space for cutting an ear portion from the cut glass ribbon And adjusting the air pressure of at least one of the glass ribbon cutting space and the ear cutting space so that the air pressure in the glass ribbon cutting space is higher than the air pressure in the ear cutting space. It is configured. And in the glass plate manufacturing equipment shown by patent document 2, the glass dust produced when cutting an ear
  • the molding furnace and the annealing furnace are connected by a pothole-shaped booth, and a rising air flow is generated by the chimney effect in the booth, so the glass dust generated when cutting the glass ribbon is below the annealing furnace.
  • glass dust generated when the glass ribbon is cut in the cutting chamber cannot be prevented from diffusing from the cutting chamber into the annealing furnace.
  • the present invention has been made in view of such current problems, and it is possible to prevent glass dust from diffusing from the cutting chamber into the annealing furnace, and to manufacture a glass plate having excellent surface quality. It aims at providing the glass plate manufacturing equipment which can be performed, and the manufacturing method of a glass plate.
  • the glass plate manufacturing facility is connected to a forming furnace provided with a formed body for forming a glass ribbon by a downdraw method, and is formed below the forming furnace and formed by the forming furnace.
  • An annealing furnace that gradually cools the glass ribbon that is conveyed vertically downward, a cutting device that is disposed in a space communicating with the lower part of the annealing furnace, and that cuts the glass ribbon into a predetermined dimension; and the annealing And a pressurizing device that pressurizes the pressure inside the furnace to a pressure higher than the pressure in the space in which the cutting device is disposed.
  • the annealing furnace includes, in order from the upper side, a slow cooling part that gradually cools the glass ribbon formed by the molding furnace, and the slowly cooled glass.
  • a cooling unit that cools the ribbon, the slow cooling unit includes an annealing roller for transporting the glass ribbon while cooling, and the cooling unit transports the glass ribbon while cooling
  • the pressure device is connected to the annealing furnace below the support roller.
  • the pressurizing device is an air conditioner including an air supply fan, a temperature control coil, and a filter device. With such a configuration, it is possible to more reliably prevent glass dust from adhering to the glass ribbon inside the annealing furnace.
  • the manufacturing method of the glass plate which concerns on 4th invention of this application is a glass plate manufacturing method by a down draw method, Comprising: The forming furnace provided with the molded object for shape
  • the said annealing furnace is the slow cooling part which anneals the said glass ribbon shape
  • the slow cooling unit includes an annealing roller for transporting while cooling the glass ribbon, and the cooling unit transports while cooling the glass ribbon
  • a pressure roller is provided below the support roller to supply air into the annealing furnace and pressurize the molding furnace and the annealing furnace.
  • the glass plate manufacturing method according to the sixth invention of the present application is characterized in that air whose temperature is adjusted by an air conditioner is supplied into the annealing furnace. With such a configuration, it is possible to more reliably prevent glass dust from adhering to the glass ribbon inside the annealing furnace.
  • the said air conditioner is equipped with the filter apparatus,
  • the said cleanliness improved through the said filter apparatus by the said air conditioner in the said annealing furnace. It is characterized by supplying air. With such a configuration, it is possible to more reliably prevent glass dust from adhering to the glass ribbon inside the annealing furnace.
  • the space in which the forming furnace and the annealing furnace are arranged is further pressurized.
  • the glass plate manufacturing equipment and the glass plate manufacturing method according to the present invention can prevent foreign matters such as glass dust from entering the annealing furnace, and can prevent foreign matters from adhering to the surface of the glass ribbon during slow cooling. Thereby, the glass plate which has the outstanding surface quality can be manufactured.
  • the front schematic diagram which shows the whole structure of the glass plate manufacturing equipment which concerns on one Embodiment of this invention.
  • the side surface schematic diagram which shows the whole structure of the glass plate manufacturing equipment which concerns on one Embodiment of this invention.
  • a glass plate manufacturing facility 1 shown in FIGS. 1 and 2 is a facility for manufacturing a glass plate by an overflow downdraw method, and is disposed inside a building X.
  • the glass plate manufacturing facility 1 includes a forming furnace 2, and the forming furnace 2 includes a formed body 3 for forming a glass ribbon G2 from molten glass G1.
  • the molded body 3 is used for molding the glass ribbon G2 by the overflow down draw method, has a wedge-shaped cross-sectional shape, and supplies the molten glass G1 from above the molded body 3, and the molten glass G1 from the top.
  • the glass ribbon G2 can be formed by overflowing the molten glass G1 and fusing the overflowed molten glass G1 at its lower end.
  • the molding furnace 2 includes a plate drawing roller 2a, and the end portion in the width direction of the glass ribbon G2 fused at the lower end portion of the molded body 3 is clamped by a pair of plate drawing rollers 2a and 2a to form an ear portion. It is set as the structure shape
  • the configuration in which the plate drawing roller 2a is provided in the molding furnace 2 is illustrated, but the plate drawing roller 2a may be provided in an annealing furnace to be described later.
  • the glass plate manufacturing facility 1 includes an annealing furnace 4.
  • the annealing furnace 4 is a furnace for gradually cooling and cooling the glass ribbon G2, and includes a slow cooling part 5 and a cooling part 6 in order from above.
  • the glass ribbon G2 formed in the forming furnace 2 is sent to an annealing furnace 4 communicating with the lower end of the forming furnace 2.
  • the glass plate manufacturing equipment 1 is set as the structure which covers the series conveyance path
  • a series of booths 7 is constituted by the second booth 7b.
  • the first booth 7a surrounds the slow cooling part 5 of the molding furnace 2 and the annealing furnace 4, is closed above the molding furnace 2, and the second booth 7b surrounds the cooling part 6 of the annealing furnace 4,
  • the annealing furnace 4 is opened below the cooling unit 6. That is, the first booth 7a constitutes a part of the slow cooling part 5 of the molding furnace 2 and the annealing furnace 4, and the second booth 7b constitutes a part of the cooling part 6 of the annealing furnace 4. It is.
  • the annealing portion 5 of the annealing furnace 4 is a portion for gradually cooling to remove the residual distortion of the glass ribbon G2, and includes a heater (not shown), adjusts the temperature in the booth 7, and the glass ribbon G2
  • the glass ribbon G2 is conveyed vertically downward by the ceramic annealing roller 5a while adjusting the cooling rate.
  • the cooling unit 6 of the annealing furnace 4 is a part for further sufficiently cooling the glass ribbon G2 that has been gradually cooled by the slow cooling unit 5, and while the glass ribbon G2 is allowed to cool, by a rubber support roller 6a, The glass ribbon G2 is conveyed vertically downward.
  • the glass plate manufacturing facility 1 includes a cutting device 8.
  • the glass ribbon G2 sufficiently cooled by the cooling unit 6 of the annealing furnace 4 is discharged downward from the lower end of the annealing furnace 4 and into a space (a cutting chamber C described later) communicating with the lower end of the annealing furnace 4. Sent.
  • the glass plate manufacturing equipment 1 having such a configuration is arranged in the building X across a plurality of upper and lower floors.
  • a slow cooling part 5 of the forming furnace 2 and the annealing furnace 4 is arranged in a forming slow cooling chamber A on the fourth floor of the building X, and the cooling part 6 of the annealing furnace 4 is 3 of the building X. It is arranged in the cooling room B on the floor.
  • the installation floor number of the forming furnace 2 and the annealing furnace 4 (the slow cooling part 5 and the cooling part 6) shown in this embodiment is an example, and the structure of the glass plate manufacturing equipment 1 is arranged by the glass plate manufacturing equipment 1 It is not limited by the structure (number of floors) of the building X to be used and the number of installation floors of each part.
  • the cutting device 8 is disposed in the cutting chamber C on the second floor of the building X, and the glass plate G3 cut into a predetermined length L by the cutting device 8 as shown in FIG.
  • a step of transporting in the horizontal direction by a transport device (not shown) and further cutting to a predetermined width W by a cutting device (not shown) is provided on the same floor.
  • the glass plate manufacturing facility 1 has a stacking room D for stacking glass to be discarded and glass to be reused on the first floor of the building X, and a defect occurs during cutting by the cutting device 8.
  • Glass glass (referred to as defective glass G4) is dropped to the lower floor from the opening 9 formed immediately below the cutting device 8, so that the defective glass G4 can be easily accumulated in the accumulation room D on the first floor. It is configured.
  • the opening 9 is provided with an opening / closing door (not shown) that is opened when the defective glass G4 is dropped and closed at other times.
  • the glass plate manufacturing facility 1 includes an air conditioner 10.
  • the air conditioner 10 is arrange
  • the air conditioner 10 is a device for pressurizing the interior of the booth 7 (that is, a pressurizing device), and includes an air supply fan 11, a temperature control coil 12, and the like, and adjusts the air supply temperature of the air conditioner 10. It is configured to be able to.
  • the air conditioner 10 may adjust the temperature of the outside air taken from the outside air duct 13 by the temperature control coil 12 and then supply the air inside the booth 7 via the air supply duct 14 to increase the atmospheric pressure in the booth 7. It is configured to be able to. It is agreed that the atmospheric pressure in the booth 7 will increase and the atmospheric pressure in the furnaces of the forming furnace 2 and annealing furnace 4 will increase.
  • the glass plate manufacturing equipment 1 adjusts the temperature in the booth 7 by adjusting the temperature of the supply air according to the temperature of the outside air taken in from the outside air duct 13 by the temperature control coil 12 of the air conditioner 10, thereby achieving a chimney effect. It is comprised so that the air volume of the rising airflow which arises can be adjusted.
  • the air conditioner 10 further includes a filter device 15.
  • the filter device 15 is a device for filtering the air supplied into the booth 7 and increasing the cleanliness of the air.
  • the glass plate manufacturing facility 1 is configured such that the outside air taken in from the outside air duct 13 by the air conditioner 10 can be supplied into the booth 7 after temperature adjustment and filtration.
  • the glass plate manufacturing facility 1 employs a so-called HEPA filter as a filter constituting the filter device 15 and highly removes dust from the air supplied through the filter device 15. Can be maintained as clean as a clean room.
  • the glass plate manufacturing equipment 1 pressurizes the inside of the booth 7 with the air conditioner 10, thereby comparing the pressure of the part corresponding to the annealing furnace 4 in the booth 7 to the pressure of the cutting chamber C in which the cutting device 8 is disposed. Thus, an air flow from the annealing furnace 4 toward the cutting chamber C is generated.
  • the glass plate manufacturing facility 1 can suppress the rising air flow generated in the booth 7 by the chimney effect by supplying air into the booth 7 by the air conditioner 10, and further, dust is generated along with the rising air flow. Can be prevented from flowing into the booth 7 (annealing furnace 4) from the cutting chamber C, whereby the adhesion of foreign matter (particularly glass dust) to the glass ribbon G2 is more reliably suppressed.
  • the glass plate manufacturing facility 1 communicates with a forming furnace 2 including a formed body 3 for forming a glass ribbon G2 by an overflow downdraw method, and a lower portion of the forming furnace 2,
  • An annealing furnace 4 that gradually cools the glass ribbon G2 formed by the forming furnace 2 while being conveyed vertically downward, and a glass ribbon G2 that is disposed in a cutting chamber C that is a space communicating below the annealing furnace 4 is predetermined.
  • the pressure inside the annealing furnace 4 ie, inside the booth 7) is increased to a pressure higher than the pressure in the cutting chamber C in which the cutting device 8 is disposed.
  • an air conditioner 10 as a pressure device.
  • the glass plate manufacturing equipment 1 invasion of foreign matters such as glass dust into the annealing furnace 4 can be prevented, and foreign matter can be prevented from adhering to the surface of the glass ribbon G2 during slow cooling, and has excellent surface quality.
  • the glass plate G3 can be manufactured.
  • the pressurizing device in the glass plate manufacturing facility 1 is an air conditioner 10 including an air supply fan 11, a temperature control coil 12, and a filter device 15. With such a configuration, glass dust is generated inside the annealing furnace 4. It can prevent more reliably that it adheres to the glass ribbon G2.
  • the glass plate manufacturing facility 1 has a configuration in which an air supply duct 14 for sending air supply from the air conditioner 10 into the booth 7 is connected to the booth 7 corresponding to the annealing furnace 4 at a position below the support roller 6a. Among each part of the booth 7, the pressure in the second booth 7b closest to the cutting device 8 and corresponding to the cooling furnace 6 is made highest.
  • the annealing furnace 4 gradually cools the glass ribbon G2 while adjusting the cooling rate while heating with a heater or the like in the slow cooling section 5, so that the first booth 7 a corresponding to the slow cooling section 5 is supplied with air. When the duct 14 is connected, the slow cooling rate may be disturbed.
  • the air supply duct 14 is preferably connected to the second booth 7b corresponding to the cooling unit 6 rather than being connected to the first booth 7a corresponding to the slow cooling unit 5 of the annealing furnace 4, and More preferably, the booth 7b is connected to a portion closer to the cutting device 8.
  • the annealing furnace 4 includes, in order from the upper side, a slow cooling part 5 that gradually cools the glass ribbon G2 formed by the forming furnace 2, and a cooling part that cools the slowly cooled glass ribbon G2.
  • the slow cooling unit 5 includes an annealing roller 5a made of an inorganic material such as ceramic for transporting the glass ribbon G2 while cooling, and the cooling unit 6 cools the glass ribbon G2.
  • a support roller 6a made of a heat-resistant resin material such as rubber for conveyance is provided, and an air supply duct 14 connected to the air conditioner 10 is below the support roller 6a, and the annealing furnace 4 (that is, the second).
  • This configuration is connected to the booth 7b). With such a configuration, it is possible to increase the pressure of the cooling unit 6 in the annealing furnace 4, and to ensure that glass dust enters the annealing furnace 4 from the cutting chamber C. prevent Door can be.
  • the glass plate manufacturing facility 1 further includes a pressure fan 20.
  • the pressurizing fan 20 is a fan for pressurizing the inside of the forming slow cooling chamber A, and is connected to the forming slow cooling chamber A by an air supply duct 21, and the outside air taken in from the outside air duct 22 is converted into the forming slow cooling chamber.
  • the inside of the molding annealing chamber A is pressurized.
  • the glass plate manufacturing equipment 1 is suppressing the leak of the updraft from the booth 7 corresponding to the slow cooling part 5 of the forming furnace 2 and the annealing furnace 4 by pressurizing the inside of the forming slow cooling chamber A, Thereby, the air volume of the updraft flowing through the booth 7 is suppressed.
  • the manufacturing method of the glass plate which concerns on one Embodiment of this invention is demonstrated.
  • the manufacturing method of the glass plate which concerns on one Embodiment of this invention is a manufacturing method which manufactures the glass plate G3 using the glass plate manufacturing equipment 1.
  • the inside of the booth 7 is pressurized with the air conditioner 10, and the atmospheric
  • the pressure of each part of the glass plate manufacturing facility 1 if there is an exhaust fan (not shown) that exhausts air from the glass plate manufacturing facility 1, the exhaust amount of the exhaust fan is also adjusted. Also good.
  • the difference between the atmospheric pressure of each part of the annealing furnace 4 (the slow cooling part 5 and the cooling part 6) and the atmospheric pressure of each room (the cutting room C and the accumulation room D) is represented by a symbol “+”. Expressed by the size of the number.
  • the cooling unit 6 (high pressure side) and the cooling chamber B of the annealing furnace 4 are detected by the differential pressure gauge P1.
  • the pressure difference with respect to the (low pressure side) is managed so that the inside of the cooling unit 6 has a positive pressure of about 2 Pa with respect to the cooling chamber B.
  • the air conditioner 10 since the air conditioner 10 is pressurizing the cooling part 6, the inside of the cooling part 6 is 5 with respect to the cutting chamber C in the differential pressure gauge P2. It shows that the positive pressure is about 15 Pa.
  • voltage of the annealing part 4 (low pressure side) and the cooling part 6 (high pressure side) of the annealing furnace 4 is managed with the differential pressure gauge P3.
  • the inside of the cooling unit 6 is set to a positive pressure of about 0 to 3 Pa with respect to the slow cooling unit 5.
  • voltage of the cooling part 6 (low pressure side) and the annealing annealing chamber A (high pressure side) of the annealing furnace 4 is managed with the differential pressure gauge P4.
  • the forming slow cooling chamber A is set to a positive pressure of about 0 to 6 Pa with respect to the inside of the cooling unit 6.
  • the differential pressure gauge P5 manages the differential pressure
  • a positive pressure of about 1 to 5 Pa is applied to the accumulation chamber D.
  • the cooling part 6 of the annealing furnace 4 is the slow cooling part 5 by managing the differential pressure
  • FIG. thus, a positive pressure is surely applied to the cutting chamber C, so that the adhesion of foreign matter to the glass ribbon G2 is reliably suppressed.
  • the method for manufacturing a glass plate according to an embodiment of the present invention is a method for manufacturing a glass plate G3 by an overflow downdraw method, and includes a forming furnace 2 including a formed body 3 for forming a glass ribbon G2.
  • the furnace (in the booth 7) of the annealing furnace 4 that communicates with the lower part of the forming furnace 2 and gradually cools the glass ribbon G2 formed by the forming furnace 2 while being conveyed vertically downward is pressurized.
  • the pressure in the forming furnace 2 and the annealing furnace 4 (in the booth 7) as compared to the pressure in the cutting chamber C in which the cutting device 8 for cutting the glass ribbon G2 into a predetermined length L is disposed. Is to raise.
  • invasion of foreign materials, such as glass dust, into the annealing furnace 4 is prevented, and the glass ribbon G2 under slow cooling is prevented.
  • a foreign material can be prevented from adhering to the surface, and a glass plate G3 having excellent surface quality can be manufactured.
  • the air supply duct 14 constituting the glass plate manufacturing facility 1 is connected to the booth 7 at a position below the support roller 6 a of the annealing furnace 4.
  • the pressure inside the annealing furnace 4 is set to be the highest at the part closest to the cutting device 8.
  • the annealing furnace 4 is gradually cooled from the upper side, with the slow cooling part 5 for gradually cooling the glass ribbon G2 formed by the forming furnace 2.
  • a cooling unit 6 for cooling the glass ribbon G2 includes an annealing roller 5a for transporting the glass ribbon G2 while gradually cooling, and the cooling unit 6 cools the glass ribbon G2.
  • a support roller 6a is provided for transporting, and air is supplied into the annealing furnace 4 (in the second booth 7b) below the support roller 6a to pressurize the inside of the forming furnace 2 and the annealing furnace 4. Is.
  • the pressure of the cooling unit 6 in the annealing furnace 4 can be increased, and glass dust can be reliably prevented from entering the annealing furnace 4 from the cutting chamber C.
  • the manufacturing method of the glass plate which concerns on one Embodiment of this invention by adjusting the temperature of the air supplied in the booth 7 with the air conditioner 10, the upward airflow which arises in the booth 7 by a chimney effect is further suppressed.
  • the annealing furnace 4 it is possible to more reliably prevent foreign matter (particularly glass dust) from adhering to the glass ribbon G2.
  • the inside of the booth 7 is maintained by the cleanliness degree of a clean room by making the cleanliness of the air supplied into the booth 7 with the air conditioner 10 high.
  • the adhesion of foreign matter (particularly glass dust) to the glass ribbon G2 in the annealing furnace 4 is more reliably suppressed.
  • the air adjusted in temperature by the air conditioner 10 is supplied into the annealing furnace 4, and the air conditioner 10 includes the filter device 15.
  • the air conditioner 10 includes the filter device 15.
  • air with increased cleanliness is supplied through the filter device 15 by the air conditioner 10.
  • the air supply amount of the pressurization fan 20 which comprises the glass plate manufacturing equipment 1 is adjusted, and this glass The pressure in the forming annealing chamber A of the plate manufacturing facility 1 is adjusted.
  • the differential pressure between the forming annealing chamber A (high pressure side) and the tower E (low pressure side) is managed by the differential pressure gauge P6.
  • the forming annealing chamber A is set to a positive pressure of about 20 to 30 Pa with respect to the tower E.
  • the leak of the updraft from the booth 7 is suppressed by managing the differential pressure
  • molding slow cooling chamber A with the pressurization fan 20, and a booth by the air conditioner 10 The quality of the glass plate G3 can be further improved by the synergistic effect of the surface quality improvement effect of the glass ribbon G2 obtained by pressurizing the inside 7.
  • the forming annealing chamber A which is a space in which the forming furnace 2 and the annealing furnace 4 are arranged, is further pressurized.
  • the upward air flow in the booth 7 can be suppressed, and consequently, the glass dust is prevented from adhering to the glass ribbon G2 inside the annealing furnace 4, and the shaking of the glass ribbon G2 is suppressed.
  • the distortion of the glass ribbon G2 can be reduced.
  • the case where the glass plate G3 is manufactured by the overflow downdraw method has been exemplified.
  • the glass plate manufacturing method and the glass plate manufacturing facility according to the present invention are manufactured by the slot (slit) downdraw method.
  • the present invention can also be applied when manufacturing.
  • the glass plate manufacturing equipment and the glass plate manufacturing method according to the present invention can be widely applied when manufacturing various glass substrates for liquid crystal displays, plasma displays, electroluminescence displays, field emission displays, and the like. .

Abstract

To prevent glass dust from diffusing from a cutting chamber into the interior of an annealing furnace, and to manufacture a glass sheet having exceptional surface quality. This facility 1 for manufacturing a glass sheet is provided with: a molding furnace 2 provided with a molded body 3 for molding a glass ribbon G2 by the overflow downdraw method; an annealing furnace 4 for gradually cooling the glass ribbon G2 molded by the molding furnace 2 while conveying the glass ribbon G2 vertically downward, the annealing furnace 4 communicating with the lower part of the molding furnace 2; a cutting device 8 disposed in a cutting chamber C which is a space communicating with the lower part of the annealing furnace 4, the cutting device 8 cutting the glass ribbon G2 to a prescribed length L; and an air conditioner 10 for pressurizing the interior of the annealing furnace 4 (i.e., the inside of a booth 7) to an atmospheric pressure higher than the atmospheric pressure of the cutting chamber C in which the cutting device 8 is disposed.

Description

ガラス板製造設備およびガラス板の製造方法Glass plate manufacturing equipment and glass plate manufacturing method
　本発明は、ダウンドロー法によるガラス板製造設備およびガラス板の製造方法の技術に関する。 The present invention relates to a technology for glass plate manufacturing equipment and a method for manufacturing a glass plate by a downdraw method.
　近年、液晶ディスプレイの高精細化の要求等に対応するべく、ガラス板の表面品質の更なる向上が求められており、ガラス板を製造する際に、ガラス板の表面に異物が付着することを防止する必要性が高まっている。
　このため従来、ガラス板の表面に異物が付着することを防止するための技術として、特許文献１、２に示すような技術が開発されている。 In recent years, there has been a demand for further improvements in the surface quality of glass plates in order to meet the demands for higher definition of liquid crystal displays. When manufacturing glass plates, foreign substances adhere to the surface of the glass plates. The need to prevent is increasing.
For this reason, techniques as shown in Patent Documents 1 and 2 have been developed as techniques for preventing foreign matter from adhering to the surface of a glass plate.
　特許文献１に示されているガラス板製造設備では、ガラスリボンを所定の寸法に切断してガラス基板を製造するための空間である切断室と、該切断室の下方に設けられた、廃棄ガラス基板を回収するための空間である回収室と、を備えており、回収室の気圧を切断室の気圧に比して低くする構成としている。
　そして、特許文献１に示されているガラス板製造設備では、このような構成により、廃棄ガラス基板が割れる際に生じるガラス粉塵が、回収室から切断室へと拡散することを防止し、これにより、切断室においてガラス粉塵がガラス基板に付着することを防止している。 In the glass plate manufacturing facility disclosed in Patent Document 1, a cutting chamber that is a space for manufacturing a glass substrate by cutting a glass ribbon into a predetermined size, and a waste glass provided below the cutting chamber A recovery chamber which is a space for recovering the substrate, and the pressure in the recovery chamber is set lower than the pressure in the cutting chamber.
And in the glass plate manufacturing equipment shown by patent document 1, by such composition, it prevents that the glass dust which arises when a waste glass substrate cracks spreads from a recovery room to a cutting room, thereby In the cutting chamber, glass dust is prevented from adhering to the glass substrate.
　また、特許文献２に示されているガラス板製造設備では、ガラスリボンを切断するための空間であるガラスリボン切断空間と、切断されたガラスリボンから耳部を切断するための空間である耳部切断空間と、を備えており、ガラスリボン切断空間の気圧が耳部切断空間の気圧に比して高くなるように、ガラスリボン切断空間および耳部切断空間の少なくとも何れか一方の気圧を調整する構成としている。
　そして、特許文献２に示されているガラス板製造設備では、このような構成により、ガラスリボンから耳部を切断する際に生じたガラス粉塵が、ガラスリボン切断空間に侵入し、ガラスリボンに付着することを防止している。 Moreover, in the glass plate manufacturing facility shown in Patent Document 2, a glass ribbon cutting space that is a space for cutting a glass ribbon and an ear portion that is a space for cutting an ear portion from the cut glass ribbon And adjusting the air pressure of at least one of the glass ribbon cutting space and the ear cutting space so that the air pressure in the glass ribbon cutting space is higher than the air pressure in the ear cutting space. It is configured.
And in the glass plate manufacturing equipment shown by patent document 2, the glass dust produced when cutting an ear | edge part from a glass ribbon penetrate | invades into a glass ribbon cutting space, and adheres to a glass ribbon with such a structure. To prevent it.
特開２００８－２６６０９８号公報JP 2008-266098 A 国際公開２０１３／０４６６８３号International Publication No. 2013/046683
　ガラス板製造設備では、成形炉とアニール炉が竪穴状のブースによって連通されており、ブース内で煙突効果による上昇気流が生じるため、ガラスリボンを切断する際に生じるガラス粉塵が、アニール炉の下方に位置する切断室から上昇気流に乗ってアニール炉の内部に拡散することが懸念されていた。
　しかしながら、特許文献１、２に係る従来技術では、切断室においてガラスリボンを切断する際に生じるガラス粉塵が、切断室からアニール炉の内部に拡散することは防止できなかった。 In the glass plate manufacturing facility, the molding furnace and the annealing furnace are connected by a pothole-shaped booth, and a rising air flow is generated by the chimney effect in the booth, so the glass dust generated when cutting the glass ribbon is below the annealing furnace. There has been concern about diffusion into the inside of the annealing furnace by riding an ascending current from the cutting chamber located at 1.
However, in the prior arts according to Patent Documents 1 and 2, glass dust generated when the glass ribbon is cut in the cutting chamber cannot be prevented from diffusing from the cutting chamber into the annealing furnace.
　本発明は、斯かる現状の課題に鑑みてなされたものであり、ガラス粉塵が切断室からアニール炉の内部に拡散することを防止して、優れた表面品質を有するガラス板を製造することができるガラス板製造設備およびガラス板の製造方法を提供することを目的としている。 The present invention has been made in view of such current problems, and it is possible to prevent glass dust from diffusing from the cutting chamber into the annealing furnace, and to manufacture a glass plate having excellent surface quality. It aims at providing the glass plate manufacturing equipment which can be performed, and the manufacturing method of a glass plate.
　本発明の解決しようとする課題は以上の如くであり、次にこの課題を解決するための手段を説明する。 The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.
　即ち、本願の第１の発明に係るガラス板製造設備は、ダウンドロー法によりガラスリボンを成形するための成形体を備えた成形炉と、前記成形炉の下方に連通し、前記成形炉により成形された前記ガラスリボンを、鉛直下方に搬送しつつ徐冷するアニール炉と、前記アニール炉の下方に連通する空間に配置される、前記ガラスリボンを所定の寸法に切断する切断装置と、前記アニール炉の内部の気圧を、前記切断装置が配置される空間の気圧に比して高い気圧に加圧する加圧装置と、を備えることを特徴とする。 That is, the glass plate manufacturing facility according to the first invention of the present application is connected to a forming furnace provided with a formed body for forming a glass ribbon by a downdraw method, and is formed below the forming furnace and formed by the forming furnace. An annealing furnace that gradually cools the glass ribbon that is conveyed vertically downward, a cutting device that is disposed in a space communicating with the lower part of the annealing furnace, and that cuts the glass ribbon into a predetermined dimension; and the annealing And a pressurizing device that pressurizes the pressure inside the furnace to a pressure higher than the pressure in the space in which the cutting device is disposed.
　また、本願の第２の発明に係るガラス板製造設備において、前記アニール炉は、上方側から順に、前記成形炉により成形された前記ガラスリボンを徐冷する徐冷部と、徐冷した前記ガラスリボンを冷却する冷却部と、を備え、前記徐冷部は、前記ガラスリボンを徐冷しつつ搬送するためのアニールローラを備えており、前記冷却部は、前記ガラスリボンを冷却しつつ搬送するための支持ローラを備えており、前記加圧装置は、前記支持ローラよりも下方で、前記アニール炉に接続されることを特徴とする。
　このような構成により、アニール炉のうち冷却部の気圧を高めることができ、切断室からアニール炉にガラス粉塵が侵入することを確実に防ぐことができる。 Further, in the glass plate manufacturing facility according to the second invention of the present application, the annealing furnace includes, in order from the upper side, a slow cooling part that gradually cools the glass ribbon formed by the molding furnace, and the slowly cooled glass. A cooling unit that cools the ribbon, the slow cooling unit includes an annealing roller for transporting the glass ribbon while cooling, and the cooling unit transports the glass ribbon while cooling The pressure device is connected to the annealing furnace below the support roller.
With such a configuration, it is possible to increase the pressure of the cooling unit in the annealing furnace, and reliably prevent glass dust from entering the annealing furnace from the cutting chamber.
　また、本願の第３の発明に係るガラス板製造設備において、前記加圧装置は、給気ファンと温調コイルとフィルタ装置を備えた空調機であることを特徴とする。
　このような構成により、アニール炉の内部でガラス粉塵がガラスリボンに付着することをより確実に防ぐことができる。 In the glass plate manufacturing facility according to the third invention of the present application, the pressurizing device is an air conditioner including an air supply fan, a temperature control coil, and a filter device.
With such a configuration, it is possible to more reliably prevent glass dust from adhering to the glass ribbon inside the annealing furnace.
　また、本願の第４の発明に係るガラス板の製造方法は、ダウンドロー法によるガラス板製造方法であって、ガラスリボンを成形するための成形体を備えた成形炉と、前記成形炉の下方に連通し、前記成形炉により成形された前記ガラスリボンを鉛直下方に搬送しつつ徐冷するアニール炉、の炉内を加圧して、前記アニール炉の下方に連通し、前記ガラスリボンを所定の寸法に切断する切断装置が配置される空間の気圧に比して、前記成形炉と前記アニール炉内の気圧を高くすることを特徴とする。 Moreover, the manufacturing method of the glass plate which concerns on 4th invention of this application is a glass plate manufacturing method by a down draw method, Comprising: The forming furnace provided with the molded object for shape | molding a glass ribbon, Below the said forming furnace And pressurizing the inside of an annealing furnace that gradually cools while conveying the glass ribbon formed by the forming furnace vertically downward, and communicates with the lower part of the annealing furnace to connect the glass ribbon to a predetermined The air pressure in the molding furnace and the annealing furnace is made higher than the air pressure in the space in which the cutting device for cutting into dimensions is arranged.
　また、本願の第５の発明に係るガラス板の製造方法において、前記アニール炉は、上方側から順に、前記成形炉により成形された前記ガラスリボンを徐冷する徐冷部と、徐冷した前記ガラスリボンを冷却する冷却部と、を備え、前記徐冷部は、前記ガラスリボンを徐冷しつつ搬送するためのアニールローラを備えており、前記冷却部は、前記ガラスリボンを冷却しつつ搬送するための支持ローラを備えており、前記支持ローラよりも下方で前記アニール炉内に給気して、前記成形炉内と前記アニール炉内を加圧することを特徴とする。
　このような構成により、アニール炉のうち冷却部の気圧を高めることができ、切断室からアニール炉にガラス粉塵が侵入することを確実に防ぐことができる。 Moreover, in the manufacturing method of the glass plate which concerns on 5th invention of this application, the said annealing furnace is the slow cooling part which anneals the said glass ribbon shape | molded by the said molding furnace in order from the upper side, and said slow-cooled said A cooling unit that cools the glass ribbon, the slow cooling unit includes an annealing roller for transporting while cooling the glass ribbon, and the cooling unit transports while cooling the glass ribbon And a pressure roller is provided below the support roller to supply air into the annealing furnace and pressurize the molding furnace and the annealing furnace.
With such a configuration, it is possible to increase the pressure of the cooling unit in the annealing furnace, and reliably prevent glass dust from entering the annealing furnace from the cutting chamber.
　また、本願の第６の発明に係るガラス板の製造方法は、前記アニール炉内に、空調機によって温度調整された空気を給気することを特徴とする。
　このような構成により、アニール炉の内部でガラス粉塵がガラスリボンに付着することをより確実に防ぐことができる。 Moreover, the glass plate manufacturing method according to the sixth invention of the present application is characterized in that air whose temperature is adjusted by an air conditioner is supplied into the annealing furnace.
With such a configuration, it is possible to more reliably prevent glass dust from adhering to the glass ribbon inside the annealing furnace.
　また、本願の第７の発明に係るガラス板の製造方法においては、前記空調機はフィルタ装置を備えており、前記アニール炉内に、前記空調機によって、前記フィルタ装置を通して清浄度を高めた前記空気を給気することを特徴とする。
　このような構成により、アニール炉の内部でガラス粉塵がガラスリボンに付着することをより確実に防ぐことができる。 Moreover, in the manufacturing method of the glass plate which concerns on 7th invention of this application, the said air conditioner is equipped with the filter apparatus, The said cleanliness improved through the said filter apparatus by the said air conditioner in the said annealing furnace. It is characterized by supplying air.
With such a configuration, it is possible to more reliably prevent glass dust from adhering to the glass ribbon inside the annealing furnace.
　また、本願の第８の発明に係るガラス板の製造方法においては、さらに、前記成形炉と前記アニール炉が配置された空間を加圧することを特徴とする。
　このような構成により、上昇気流を抑制することができ、ひいては、アニール炉の内部でガラス粉塵がガラスリボンに付着することを防ぐとともに、ガラスリボンの揺れを抑制し、歪みの低減を図ることができる。 In the glass plate manufacturing method according to the eighth invention of the present application, the space in which the forming furnace and the annealing furnace are arranged is further pressurized.
With such a configuration, it is possible to suppress the upward air flow, and thus, it is possible to prevent the glass dust from adhering to the glass ribbon inside the annealing furnace, and to suppress the shaking of the glass ribbon, thereby reducing distortion. it can.
　本発明の効果として、以下に示すような効果を奏する。 As the effects of the present invention, the following effects are obtained.
　本発明に係るガラス板製造設備およびガラス板の製造方法は、アニール炉へのガラス粉塵等の異物の侵入が防止され、徐冷中のガラスリボンの表面に異物が付着することを防止できる。これにより、優れた表面品質を有するガラス板を製造することができる。 The glass plate manufacturing equipment and the glass plate manufacturing method according to the present invention can prevent foreign matters such as glass dust from entering the annealing furnace, and can prevent foreign matters from adhering to the surface of the glass ribbon during slow cooling. Thereby, the glass plate which has the outstanding surface quality can be manufactured.
本発明の一実施形態に係るガラス板製造設備の全体構成を示す正面模式図。The front schematic diagram which shows the whole structure of the glass plate manufacturing equipment which concerns on one Embodiment of this invention. 本発明の一実施形態に係るガラス板製造設備の全体構成を示す側面模式図。The side surface schematic diagram which shows the whole structure of the glass plate manufacturing equipment which concerns on one Embodiment of this invention.
　次に、本発明の実施の形態を説明する。
　まず、本発明の一実施形態に係るガラス板製造設備について説明する。
　図１および図２に示すガラス板製造設備１は、オーバーフローダウンドロー法によりガラス板を製造する設備であり、建屋Ｘの内部に配置されている。
　ガラス板製造設備１は、成形炉２を備えており、成形炉２は、溶融ガラスＧ１からガラスリボンＧ２を成形するための成形体３を備えている。 Next, an embodiment of the present invention will be described.
First, the glass plate manufacturing equipment which concerns on one Embodiment of this invention is demonstrated.
A glass plate manufacturing facility 1 shown in FIGS. 1 and 2 is a facility for manufacturing a glass plate by an overflow downdraw method, and is disposed inside a building X.
The glass plate manufacturing facility 1 includes a forming furnace 2, and the forming furnace 2 includes a formed body 3 for forming a glass ribbon G2 from molten glass G1.
　成形体３は、オーバーフローダウンドロー法によるガラスリボンＧ２の成形に用いるものであり、楔状の断面形状を有しており、該成形体３の上方から溶融ガラスＧ１を供給し、頂部から溶融ガラスＧ１を溢れ出させるとともに、溢れ出た溶融ガラスＧ１をその下端部で融合させることによって、ガラスリボンＧ２を成形することができるものである。 The molded body 3 is used for molding the glass ribbon G2 by the overflow down draw method, has a wedge-shaped cross-sectional shape, and supplies the molten glass G1 from above the molded body 3, and the molten glass G1 from the top. The glass ribbon G2 can be formed by overflowing the molten glass G1 and fusing the overflowed molten glass G1 at its lower end.
　また、成形炉２は、板引きローラ２ａを備えており、成形体３の下端部で融合されたガラスリボンＧ２の幅方向端部を一対の板引きローラ２ａ・２ａで挟圧して、耳部を備えた所定の形状に成形する構成としている。尚、本実施形態では、成形炉２において板引きローラ２ａが備えられる構成を例示しているが、板引きローラ２ａは、後述するアニール炉に備えられる構成であっても良い。 Further, the molding furnace 2 includes a plate drawing roller 2a, and the end portion in the width direction of the glass ribbon G2 fused at the lower end portion of the molded body 3 is clamped by a pair of plate drawing rollers 2a and 2a to form an ear portion. It is set as the structure shape | molded in the predetermined | prescribed shape provided with. In the present embodiment, the configuration in which the plate drawing roller 2a is provided in the molding furnace 2 is illustrated, but the plate drawing roller 2a may be provided in an annealing furnace to be described later.
　また、ガラス板製造設備１は、アニール炉４を備えている。
　アニール炉４は、ガラスリボンＧ２を徐冷および冷却するための炉であり、上方から順に、徐冷部５と冷却部６を備えている。
　成形炉２において成形されたガラスリボンＧ２は、該成形炉２の下端に連通するアニール炉４へと送られる。 The glass plate manufacturing facility 1 includes an annealing furnace 4.
The annealing furnace 4 is a furnace for gradually cooling and cooling the glass ribbon G2, and includes a slow cooling part 5 and a cooling part 6 in order from above.
The glass ribbon G2 formed in the forming furnace 2 is sent to an annealing furnace 4 communicating with the lower end of the forming furnace 2.
　そして、ガラス板製造設備１は、成形炉２からアニール炉４へと繋がるガラスリボンＧ２の一連の搬送経路を竪穴状のブース７で覆う構成としており、上端側の第一ブース７ａと下端側の第二ブース７ｂによって、一連のブース７を構成している。第一ブース７ａは、成形炉２とアニール炉４の徐冷部５を囲っており、成形炉２の上方において閉塞され、第二ブース７ｂは、アニール炉４の冷却部６を囲っており、アニール炉４の冷却部６下方において開放されている。
　即ち、第一ブース７ａは、成形炉２とアニール炉４の徐冷部５の一部を構成するものであり、第二ブース７ｂは、アニール炉４の冷却部６の一部を構成するものである。 And the glass plate manufacturing equipment 1 is set as the structure which covers the series conveyance path | route of the glass ribbon G2 connected from the shaping furnace 2 to the annealing furnace 4 with the potted booth 7, and the first booth 7a on the upper end side and the lower end side A series of booths 7 is constituted by the second booth 7b. The first booth 7a surrounds the slow cooling part 5 of the molding furnace 2 and the annealing furnace 4, is closed above the molding furnace 2, and the second booth 7b surrounds the cooling part 6 of the annealing furnace 4, The annealing furnace 4 is opened below the cooling unit 6.
That is, the first booth 7a constitutes a part of the slow cooling part 5 of the molding furnace 2 and the annealing furnace 4, and the second booth 7b constitutes a part of the cooling part 6 of the annealing furnace 4. It is.
　アニール炉４の徐冷部５は、ガラスリボンＧ２の残留歪みを除去するべく徐冷するための部位であり、図示しないヒータ等を備えており、ブース７内の温度を調整し、ガラスリボンＧ２の冷却速度を調整しつつ、セラミック製のアニールローラ５ａによって、鉛直下方にガラスリボンＧ２を搬送する。 The annealing portion 5 of the annealing furnace 4 is a portion for gradually cooling to remove the residual distortion of the glass ribbon G2, and includes a heater (not shown), adjusts the temperature in the booth 7, and the glass ribbon G2 The glass ribbon G2 is conveyed vertically downward by the ceramic annealing roller 5a while adjusting the cooling rate.
　アニール炉４の冷却部６は、徐冷部５で徐冷されたガラスリボンＧ２をさらに十分に冷却するための部位であり、ガラスリボンＧ２を放冷させつつ、ゴム製の支持ローラ６ａによって、鉛直下方にガラスリボンＧ２を搬送する。 The cooling unit 6 of the annealing furnace 4 is a part for further sufficiently cooling the glass ribbon G2 that has been gradually cooled by the slow cooling unit 5, and while the glass ribbon G2 is allowed to cool, by a rubber support roller 6a, The glass ribbon G2 is conveyed vertically downward.
　また、ガラス板製造設備１は、切断装置８を備えている。
　アニール炉４の冷却部６で十分に冷却されたガラスリボンＧ２は、アニール炉４の下端から下方に向けて排出され、該アニール炉４の下端に連通する空間（後述する切断室Ｃ）へと送られる。 Further, the glass plate manufacturing facility 1 includes a cutting device 8.
The glass ribbon G2 sufficiently cooled by the cooling unit 6 of the annealing furnace 4 is discharged downward from the lower end of the annealing furnace 4 and into a space (a cutting chamber C described later) communicating with the lower end of the annealing furnace 4. Sent.
　このような構成のガラス板製造設備１は、建屋Ｘの内部において上下複数の階に跨って配置されている。
　ガラス板製造設備１は、成形炉２とアニール炉４の徐冷部５が建屋Ｘの４階の成形徐冷室Ａに配置されており、アニール炉４の冷却部６は、建屋Ｘの３階の冷却室Ｂに配置されている。
　尚、本実施形態で示した成形炉２およびアニール炉４（徐冷部５、冷却部６）の設置階数は例示であり、ガラス板製造設備１の構成は、該ガラス板製造設備１が配置される建屋Ｘの構造（階数）および各部位の設置階数によっては限定されない。 The glass plate manufacturing equipment 1 having such a configuration is arranged in the building X across a plurality of upper and lower floors.
In the glass plate manufacturing facility 1, a slow cooling part 5 of the forming furnace 2 and the annealing furnace 4 is arranged in a forming slow cooling chamber A on the fourth floor of the building X, and the cooling part 6 of the annealing furnace 4 is 3 of the building X. It is arranged in the cooling room B on the floor.
In addition, the installation floor number of the forming furnace 2 and the annealing furnace 4 (the slow cooling part 5 and the cooling part 6) shown in this embodiment is an example, and the structure of the glass plate manufacturing equipment 1 is arranged by the glass plate manufacturing equipment 1 It is not limited by the structure (number of floors) of the building X to be used and the number of installation floors of each part.
　ガラス板製造設備１は、切断装置８が建屋Ｘの２階の切断室Ｃに配置されており、図２に示すように、切断装置８で所定の長さＬに切断されたガラス板Ｇ３を図示しない搬送装置によって水平方向に搬送して、さらに図示しない切断装置によって所定の幅Ｗに切断する工程が同じ階に設けられている。 In the glass plate manufacturing facility 1, the cutting device 8 is disposed in the cutting chamber C on the second floor of the building X, and the glass plate G3 cut into a predetermined length L by the cutting device 8 as shown in FIG. A step of transporting in the horizontal direction by a transport device (not shown) and further cutting to a predetermined width W by a cutting device (not shown) is provided on the same floor.
　さらに、ガラス板製造設備１は、建屋Ｘの１階において、廃棄するガラスや再利用するガラスを集積するための集積室Ｄを配置しており、切断装置８による切断の際等に不良が生じたガラス（不良ガラスＧ４と呼ぶ）を、切断装置８の直下に形成した開口部９から下階に落下させることで、不良ガラスＧ４を１階の集積室Ｄに容易に集積することができるように構成している。尚、開口部９には、不良ガラスＧ４を落下させるときに開とし、その他のときは閉とする図示しない開閉扉を設けている。 Further, the glass plate manufacturing facility 1 has a stacking room D for stacking glass to be discarded and glass to be reused on the first floor of the building X, and a defect occurs during cutting by the cutting device 8. Glass glass (referred to as defective glass G4) is dropped to the lower floor from the opening 9 formed immediately below the cutting device 8, so that the defective glass G4 can be easily accumulated in the accumulation room D on the first floor. It is configured. The opening 9 is provided with an opening / closing door (not shown) that is opened when the defective glass G4 is dropped and closed at other times.
　さらに、ガラス板製造設備１は、空調機１０を備えている。尚、本実施形態では、空調機１０を建屋Ｘの２階に配置した場合を例示しているが、ガラス板製造設備１における空調機１０の配置はこれに限定されない。 Furthermore, the glass plate manufacturing facility 1 includes an air conditioner 10. In addition, in this embodiment, although the case where the air conditioner 10 is arrange | positioned on the 2nd floor of the building X is illustrated, arrangement | positioning of the air conditioner 10 in the glass plate manufacturing equipment 1 is not limited to this.
　空調機１０は、ブース７の内部を加圧するための装置（即ち、加圧装置）であり、給気ファン１１、温調コイル１２等を備えており、空調機１０の給気温度を調整することができるように構成している。空調機１０は、外気ダクト１３から取り入れた外気を温調コイル１２によって温度調整した後に、給気ダクト１４を介してブース７の内部に給気して、ブース７内の気圧を上昇させることができるように構成している。尚、ブース７内の気圧が上昇することと、成形炉２およびアニール炉４の炉内の気圧が上昇することは同意である。 The air conditioner 10 is a device for pressurizing the interior of the booth 7 (that is, a pressurizing device), and includes an air supply fan 11, a temperature control coil 12, and the like, and adjusts the air supply temperature of the air conditioner 10. It is configured to be able to. The air conditioner 10 may adjust the temperature of the outside air taken from the outside air duct 13 by the temperature control coil 12 and then supply the air inside the booth 7 via the air supply duct 14 to increase the atmospheric pressure in the booth 7. It is configured to be able to. It is agreed that the atmospheric pressure in the booth 7 will increase and the atmospheric pressure in the furnaces of the forming furnace 2 and annealing furnace 4 will increase.
　ガラス板製造設備１は、空調機１０の温調コイル１２によって、外気ダクト１３から取り入れる外気の温度に応じて給気温度を調整することにより、ブース７内の温度を調整して、煙突効果に起因して生じる上昇気流の風量を調整することができるように構成している。 The glass plate manufacturing equipment 1 adjusts the temperature in the booth 7 by adjusting the temperature of the supply air according to the temperature of the outside air taken in from the outside air duct 13 by the temperature control coil 12 of the air conditioner 10, thereby achieving a chimney effect. It is comprised so that the air volume of the rising airflow which arises can be adjusted.
　また、空調機１０は、フィルタ装置１５をさらに備えている。
　フィルタ装置１５は、ブース７内に給気する空気を濾過して、該空気の清浄度を高めるための装置である。
　ガラス板製造設備１は、空調機１０によって外気ダクト１３から取り入れた外気を、温度調整および濾過した後に、ブース７内に給気することができるように構成している。 The air conditioner 10 further includes a filter device 15.
The filter device 15 is a device for filtering the air supplied into the booth 7 and increasing the cleanliness of the air.
The glass plate manufacturing facility 1 is configured such that the outside air taken in from the outside air duct 13 by the air conditioner 10 can be supplied into the booth 7 after temperature adjustment and filtration.
　また、ガラス板製造設備１では、フィルタ装置１５を構成するフィルタとして所謂ＨＥＰＡフィルタを採用しており、フィルタ装置１５を介して給気される空気から高度に粉塵を除去しており、ブース７内をクリーンルーム並みの清浄度に維持することができる構成としている。 Further, the glass plate manufacturing facility 1 employs a so-called HEPA filter as a filter constituting the filter device 15 and highly removes dust from the air supplied through the filter device 15. Can be maintained as clean as a clean room.
　さらに、ガラス板製造設備１は、空調機１０でブース７内を加圧することによって、ブース７におけるアニール炉４に対応する部位の気圧を、切断装置８の配置された切断室Ｃの気圧に比して高くしており、これにより、アニール炉４から切断室Ｃに向かう気流を生じさせるようにしている。 Furthermore, the glass plate manufacturing equipment 1 pressurizes the inside of the booth 7 with the air conditioner 10, thereby comparing the pressure of the part corresponding to the annealing furnace 4 in the booth 7 to the pressure of the cutting chamber C in which the cutting device 8 is disposed. Thus, an air flow from the annealing furnace 4 toward the cutting chamber C is generated.
　また、ガラス板製造設備１は、空調機１０によってブース７内に給気を行うことにより、煙突効果によってブース７内で生じる上昇気流も抑制することができ、さらに、その上昇気流に伴って粉塵が切断室Ｃからブース７内（アニール炉４）へ流入するのを抑制することができ、これにより、ガラスリボンＧ２への異物（特にガラス粉塵）の付着がより確実に抑制される。 Moreover, the glass plate manufacturing facility 1 can suppress the rising air flow generated in the booth 7 by the chimney effect by supplying air into the booth 7 by the air conditioner 10, and further, dust is generated along with the rising air flow. Can be prevented from flowing into the booth 7 (annealing furnace 4) from the cutting chamber C, whereby the adhesion of foreign matter (particularly glass dust) to the glass ribbon G2 is more reliably suppressed.
　即ち、本発明の一実施形態に係るガラス板製造設備１は、オーバーフローダウンドロー法によりガラスリボンＧ２を成形するための成形体３を備えた成形炉２と、成形炉２の下方に連通し、成形炉２により成形されたガラスリボンＧ２を、鉛直下方に搬送しつつ徐冷するアニール炉４と、アニール炉４の下方に連通する空間である切断室Ｃに配置される、ガラスリボンＧ２を所定の長さＬに切断する切断装置８と、アニール炉４の内部（即ち、ブース７内）の気圧を、切断装置８が配置される切断室Ｃの気圧に比して高い気圧に加圧する加圧装置たる空調機１０と、を備えるものである。 That is, the glass plate manufacturing facility 1 according to an embodiment of the present invention communicates with a forming furnace 2 including a formed body 3 for forming a glass ribbon G2 by an overflow downdraw method, and a lower portion of the forming furnace 2, An annealing furnace 4 that gradually cools the glass ribbon G2 formed by the forming furnace 2 while being conveyed vertically downward, and a glass ribbon G2 that is disposed in a cutting chamber C that is a space communicating below the annealing furnace 4 is predetermined. The pressure inside the annealing furnace 4 (ie, inside the booth 7) is increased to a pressure higher than the pressure in the cutting chamber C in which the cutting device 8 is disposed. And an air conditioner 10 as a pressure device.
　そして、ガラス板製造設備１によれば、アニール炉４へのガラス粉塵等の異物の侵入が防止され、徐冷中のガラスリボンＧ２の表面に異物が付着することを防止でき、優れた表面品質を有するガラス板Ｇ３を製造することができる。 And according to the glass plate manufacturing equipment 1, invasion of foreign matters such as glass dust into the annealing furnace 4 can be prevented, and foreign matter can be prevented from adhering to the surface of the glass ribbon G2 during slow cooling, and has excellent surface quality. The glass plate G3 can be manufactured.
　また、ガラス板製造設備１における加圧装置は、給気ファン１１と温調コイル１２とフィルタ装置１５を備えた空調機１０であり、このような構成により、アニール炉４の内部でガラス粉塵がガラスリボンＧ２に付着することをより確実に防ぐことができる。 The pressurizing device in the glass plate manufacturing facility 1 is an air conditioner 10 including an air supply fan 11, a temperature control coil 12, and a filter device 15. With such a configuration, glass dust is generated inside the annealing furnace 4. It can prevent more reliably that it adheres to the glass ribbon G2.
　ガラス板製造設備１は、空調機１０の給気をブース７内に送り込む給気ダクト１４を、支持ローラ６ａよりも下方の位置で、アニール炉４に対応するブース７に接続する構成としており、ブース７の各部のうち、切断装置８に最も近く冷却炉６に対応する第二ブース７ｂ内の気圧が最も高くなるようにしている。
　尚、アニール炉４は、徐冷部５において、ヒータ等で加熱しながら冷却速度を調整しつつガラスリボンＧ２を徐冷しているため、徐冷部５に対応する第一ブース７ａに給気ダクト１４を接続すると、徐冷速度が乱れる恐れがある。このため、給気ダクト１４は、アニール炉４の徐冷部５に対応する第一ブース７ａに接続するよりも冷却部６に対応する第二ブース７ｂに接続することが好ましく、さらに、第二ブース７ｂのうち切断装置８により近い部位に接続することがより好ましい。 The glass plate manufacturing facility 1 has a configuration in which an air supply duct 14 for sending air supply from the air conditioner 10 into the booth 7 is connected to the booth 7 corresponding to the annealing furnace 4 at a position below the support roller 6a. Among each part of the booth 7, the pressure in the second booth 7b closest to the cutting device 8 and corresponding to the cooling furnace 6 is made highest.
The annealing furnace 4 gradually cools the glass ribbon G2 while adjusting the cooling rate while heating with a heater or the like in the slow cooling section 5, so that the first booth 7 a corresponding to the slow cooling section 5 is supplied with air. When the duct 14 is connected, the slow cooling rate may be disturbed. For this reason, the air supply duct 14 is preferably connected to the second booth 7b corresponding to the cooling unit 6 rather than being connected to the first booth 7a corresponding to the slow cooling unit 5 of the annealing furnace 4, and More preferably, the booth 7b is connected to a portion closer to the cutting device 8.
　即ち、ガラス板製造設備１において、アニール炉４は、上方側から順に、成形炉２により成形されたガラスリボンＧ２を徐冷する徐冷部５と、徐冷したガラスリボンＧ２を冷却する冷却部６と、を備え、徐冷部５は、ガラスリボンＧ２を徐冷しつつ搬送するためのセラミック等の無機材料製のアニールローラ５ａを備えており、冷却部６は、ガラスリボンＧ２を冷却しつつ搬送するためのゴム等の耐熱樹脂材料製の支持ローラ６ａを備えており、空調機１０に接続された給気ダクト１４は、支持ローラ６ａよりも下方で、アニール炉４（即ち、第二ブース７ｂ）に接続されるものであり、このような構成により、アニール炉４のうち冷却部６の気圧を高めることができ、切断室Ｃからアニール炉４にガラス粉塵が侵入することを確実に防ぐことができる。 That is, in the glass plate manufacturing facility 1, the annealing furnace 4 includes, in order from the upper side, a slow cooling part 5 that gradually cools the glass ribbon G2 formed by the forming furnace 2, and a cooling part that cools the slowly cooled glass ribbon G2. 6, and the slow cooling unit 5 includes an annealing roller 5a made of an inorganic material such as ceramic for transporting the glass ribbon G2 while cooling, and the cooling unit 6 cools the glass ribbon G2. A support roller 6a made of a heat-resistant resin material such as rubber for conveyance is provided, and an air supply duct 14 connected to the air conditioner 10 is below the support roller 6a, and the annealing furnace 4 (that is, the second). This configuration is connected to the booth 7b). With such a configuration, it is possible to increase the pressure of the cooling unit 6 in the annealing furnace 4, and to ensure that glass dust enters the annealing furnace 4 from the cutting chamber C. prevent Door can be.
　また、本発明の一実施形態に係るガラス板製造設備１は、さらに加圧ファン２０を備えている。
　加圧ファン２０は、成形徐冷室Ａ内を加圧するためのファンであり、給気ダクト２１によって成形徐冷室Ａに接続されており、外気ダクト２２から取り入れた外気を、成形徐冷室Ａ内に給気することで、成形徐冷室Ａ内を加圧するように構成している。
　そして、ガラス板製造設備１は、成形徐冷室Ａ内を加圧することによって、成形炉２およびアニール炉４の徐冷部５に対応するブース７からの上昇気流の漏れを抑制しており、これにより、ブース７内を流れる上昇気流の風量を抑制している。 The glass plate manufacturing facility 1 according to an embodiment of the present invention further includes a pressure fan 20.
The pressurizing fan 20 is a fan for pressurizing the inside of the forming slow cooling chamber A, and is connected to the forming slow cooling chamber A by an air supply duct 21, and the outside air taken in from the outside air duct 22 is converted into the forming slow cooling chamber. By supplying air into A, the inside of the molding annealing chamber A is pressurized.
And the glass plate manufacturing equipment 1 is suppressing the leak of the updraft from the booth 7 corresponding to the slow cooling part 5 of the forming furnace 2 and the annealing furnace 4 by pressurizing the inside of the forming slow cooling chamber A, Thereby, the air volume of the updraft flowing through the booth 7 is suppressed.
　本発明の一実施形態に係るガラス板の製造方法について説明する。
　本発明の一実施形態に係るガラス板の製造方法は、ガラス板製造設備１を用いてガラス板Ｇ３を製造する製造方法である。 The manufacturing method of the glass plate which concerns on one Embodiment of this invention is demonstrated.
The manufacturing method of the glass plate which concerns on one Embodiment of this invention is a manufacturing method which manufactures the glass plate G3 using the glass plate manufacturing equipment 1. FIG.
　本発明の一実施形態に係るガラス板の製造方法では、図１および図２に示すように、ガラス板製造設備１を構成する空調機１０でブース７内を加圧することによって、アニール炉４の気圧を、切断装置８の配置された切断室Ｃの気圧に比して高くしており、これにより、アニール炉４から切断室Ｃに向かう気流を生じさせるようにしている。 In the manufacturing method of the glass plate which concerns on one Embodiment of this invention, as shown in FIG.1 and FIG.2, by pressurizing the inside of the booth 7 with the air conditioner 10 which comprises the glass plate manufacturing equipment 1, of the annealing furnace 4 The air pressure is set higher than the air pressure in the cutting chamber C in which the cutting device 8 is disposed, and thereby an air flow from the annealing furnace 4 toward the cutting chamber C is generated.
　そして、本発明の一実施形態に係るガラス板の製造方法では、空調機１０によってブース７内を加圧することにより、煙突効果によってブース７内で生じる上昇気流を抑制しており、上昇気流に伴って粉塵が切断室Ｃからブース７内へ流入することを抑制することができ、これにより、アニール炉４においてガラスリボンＧ２へ異物（特にガラス粉塵）が付着することを確実に抑制するようにしている。 And in the manufacturing method of the glass plate which concerns on one Embodiment of this invention, by pressurizing the inside of the booth 7 with the air conditioner 10, the upward airflow which arises in the booth 7 by the chimney effect is suppressed, and with an upward airflow Thus, it is possible to suppress the dust from flowing into the booth 7 from the cutting chamber C, thereby reliably suppressing foreign matter (particularly glass dust) from adhering to the glass ribbon G2 in the annealing furnace 4. Yes.
　そして、本発明の一実施形態に係るガラス板の製造方法では、ブース７のうち、アニール炉４の冷却部６に対応する第二ブース７ｂにおいて、アニール炉４内の気圧を最も高くするようにしており、これにより、切断室Ｃで生じたガラス粉塵が、アニール炉４内に流入することを抑制するようにしている。さらに、本発明の一実施形態に係るガラス板の製造方法では、第二ブース７ｂのうち、切断装置８に最も近い部位において、アニール炉４内の気圧を最も高くするようにしており、これにより、切断室Ｃで生じたガラス粉塵が、アニール炉４内に流入することをより確実に抑制するようにしている。 And in the manufacturing method of the glass plate which concerns on one Embodiment of this invention, it is made to make the atmospheric pressure in the annealing furnace 4 highest in the 2nd booth 7b corresponding to the cooling part 6 of the annealing furnace 4 among the booths 7. FIG. Thus, the glass dust generated in the cutting chamber C is prevented from flowing into the annealing furnace 4. Furthermore, in the manufacturing method of the glass plate which concerns on one Embodiment of this invention, it is trying to make the atmospheric pressure in the annealing furnace 4 the highest in the site | part nearest to the cutting device 8 among the 2nd booths 7b. The glass dust generated in the cutting chamber C is more reliably suppressed from flowing into the annealing furnace 4.
　また、本発明の一実施形態に係るガラス板の製造方法では、空調機１０によって、ブース７内を加圧して、該ガラス板製造設備１の各部位の気圧が、気圧の高い側から順に冷却部６、徐冷部５、切断室Ｃ、集積室Ｄとなるようにしている。尚、ガラス板製造設備１の各部位の気圧の調整に際しては、該ガラス板製造設備１から排気を行う図示しない排気ファンが存在する場合には、当該排気ファンの排気量を併せて調整してもよい。また、ここでは説明の便宜上、アニール炉４の各部（徐冷部５および冷却部６）の気圧と各部屋（切断室Ｃおよび集積室Ｄ）の気圧の高低差を、「＋」の記号の個数の大小で表している。 Moreover, in the manufacturing method of the glass plate which concerns on one Embodiment of this invention, the inside of the booth 7 is pressurized with the air conditioner 10, and the atmospheric | air pressure of each site | part of this glass plate manufacturing equipment 1 cools in an order from the high pressure side. It becomes the part 6, the slow cooling part 5, the cutting room C, and the accumulation room D. When adjusting the pressure of each part of the glass plate manufacturing facility 1, if there is an exhaust fan (not shown) that exhausts air from the glass plate manufacturing facility 1, the exhaust amount of the exhaust fan is also adjusted. Also good. Here, for convenience of explanation, the difference between the atmospheric pressure of each part of the annealing furnace 4 (the slow cooling part 5 and the cooling part 6) and the atmospheric pressure of each room (the cutting room C and the accumulation room D) is represented by a symbol “+”. Expressed by the size of the number.
　具体的には、図１、２に示すように、本発明の一実施形態に係るガラス板Ｇ３の製造方法では、差圧計Ｐ１によって、アニール炉４の冷却部６（高圧側）と冷却室Ｂ（低圧側）との差圧を管理して、冷却部６内が冷却室Ｂに対して２Ｐａ程度の陽圧となるようにしている。 Specifically, as shown in FIGS. 1 and 2, in the manufacturing method of the glass plate G3 according to one embodiment of the present invention, the cooling unit 6 (high pressure side) and the cooling chamber B of the annealing furnace 4 are detected by the differential pressure gauge P1. The pressure difference with respect to the (low pressure side) is managed so that the inside of the cooling unit 6 has a positive pressure of about 2 Pa with respect to the cooling chamber B.
　また、本発明の一実施形態に係るガラス板Ｇ３の製造方法では、空調機１０が冷却部６を加圧しているため、差圧計Ｐ２は、冷却部６内が切断室Ｃに対して、５～１５Ｐａ程度の陽圧となることを示している。 Moreover, in the manufacturing method of the glass plate G3 which concerns on one Embodiment of this invention, since the air conditioner 10 is pressurizing the cooling part 6, the inside of the cooling part 6 is 5 with respect to the cutting chamber C in the differential pressure gauge P2. It shows that the positive pressure is about 15 Pa.
　また、本発明の一実施形態に係るガラス板Ｇ３の製造方法では、差圧計Ｐ３によって、アニール炉４の徐冷部５（低圧側）と冷却部６（高圧側）の差圧を管理して、冷却部６内が徐冷部５に対して０～３Ｐａ程度の陽圧となるようにしている。 Moreover, in the manufacturing method of the glass plate G3 which concerns on one Embodiment of this invention, the differential pressure | voltage of the annealing part 4 (low pressure side) and the cooling part 6 (high pressure side) of the annealing furnace 4 is managed with the differential pressure gauge P3. The inside of the cooling unit 6 is set to a positive pressure of about 0 to 3 Pa with respect to the slow cooling unit 5.
　また、本発明の一実施形態に係るガラス板Ｇ３の製造方法では、差圧計Ｐ４によって、アニール炉４の冷却部６（低圧側）と成形徐冷室Ａ（高圧側）の差圧を管理して、成形徐冷室Ａが冷却部６内に対して０～６Ｐａ程度の陽圧となるようにしている。 Moreover, in the manufacturing method of the glass plate G3 which concerns on one Embodiment of this invention, the differential pressure | voltage of the cooling part 6 (low pressure side) and the annealing annealing chamber A (high pressure side) of the annealing furnace 4 is managed with the differential pressure gauge P4. Thus, the forming slow cooling chamber A is set to a positive pressure of about 0 to 6 Pa with respect to the inside of the cooling unit 6.
　また、本発明の一実施形態に係るガラス板Ｇ３の製造方法では、差圧計Ｐ５によって、切断室Ｃ（高圧側）と集積室Ｄ（低圧側）の差圧を管理して、切断室Ｃが集積室Ｄに対して１～５Ｐａ程度の陽圧となるようにしている。 Moreover, in the manufacturing method of the glass plate G3 which concerns on one Embodiment of this invention, the differential pressure gauge P5 manages the differential pressure | voltage of the cutting chamber C (high pressure side) and the accumulation | storage chamber D (low pressure side), and the cutting chamber C is used. A positive pressure of about 1 to 5 Pa is applied to the accumulation chamber D.
　このように、本発明の一実施形態に係るガラス板Ｇ３の製造方法では、ガラス板製造設備１の各部位の差圧を管理することで、アニール炉４の冷却部６が、徐冷部５と切断室Ｃに対して確実に陽圧となるようにしており、これにより、ガラスリボンＧ２に対する異物の付着を確実に抑制するようにしている。 Thus, in the manufacturing method of the glass plate G3 which concerns on one Embodiment of this invention, the cooling part 6 of the annealing furnace 4 is the slow cooling part 5 by managing the differential pressure | voltage of each site | part of the glass plate manufacturing equipment 1. FIG. Thus, a positive pressure is surely applied to the cutting chamber C, so that the adhesion of foreign matter to the glass ribbon G2 is reliably suppressed.
　即ち、本発明の一実施形態に係るガラス板の製造方法は、オーバーフローダウンドロー法によるガラス板Ｇ３の製造方法であって、ガラスリボンＧ２を成形するための成形体３を備えた成形炉２と、成形炉２の下方に連通し、成形炉２により成形されたガラスリボンＧ２を鉛直下方に搬送しつつ徐冷するアニール炉４、の炉内（ブース７内）を加圧して、アニール炉４の下方に連通し、ガラスリボンＧ２を所定の長さＬに切断する切断装置８が配置される切断室Ｃの気圧に比して、成形炉２とアニール炉４内（ブース７内）の気圧を高くするものである。 That is, the method for manufacturing a glass plate according to an embodiment of the present invention is a method for manufacturing a glass plate G3 by an overflow downdraw method, and includes a forming furnace 2 including a formed body 3 for forming a glass ribbon G2. The furnace (in the booth 7) of the annealing furnace 4 that communicates with the lower part of the forming furnace 2 and gradually cools the glass ribbon G2 formed by the forming furnace 2 while being conveyed vertically downward is pressurized. The pressure in the forming furnace 2 and the annealing furnace 4 (in the booth 7) as compared to the pressure in the cutting chamber C in which the cutting device 8 for cutting the glass ribbon G2 into a predetermined length L is disposed. Is to raise.
　そして、本発明の一実施形態に係るガラス板製造設備１を用いたガラス板Ｇ３の製造方法によれば、アニール炉４へのガラス粉塵等の異物の侵入が防止され、徐冷中のガラスリボンＧ２の表面に異物が付着することを防止でき、優れた表面品質を有するガラス板Ｇ３を製造することができる。 And according to the manufacturing method of the glass plate G3 using the glass plate manufacturing equipment 1 which concerns on one Embodiment of this invention, the penetration | invasion of foreign materials, such as glass dust, into the annealing furnace 4 is prevented, and the glass ribbon G2 under slow cooling is prevented. A foreign material can be prevented from adhering to the surface, and a glass plate G3 having excellent surface quality can be manufactured.
　また、本発明の一実施形態に係るガラス板の製造方法では、ガラス板製造設備１を構成する給気ダクト１４を、アニール炉４の支持ローラ６ａよりも下方の位置で、ブース７に接続しており、アニール炉４の各部のうち、切断装置８に最も近い部位において、アニール炉４内部の気圧が最も高くなるようにしている。 In the glass plate manufacturing method according to an embodiment of the present invention, the air supply duct 14 constituting the glass plate manufacturing facility 1 is connected to the booth 7 at a position below the support roller 6 a of the annealing furnace 4. In each part of the annealing furnace 4, the pressure inside the annealing furnace 4 is set to be the highest at the part closest to the cutting device 8.
　即ち、本発明の一実施形態に係るガラス板の製造方法において、アニール炉４は、上方側から順に、成形炉２により成形されたガラスリボンＧ２を徐冷する徐冷部５と、徐冷したガラスリボンＧ２を冷却する冷却部６と、を備え、徐冷部５は、ガラスリボンＧ２を徐冷しつつ搬送するためのアニールローラ５ａを備えており、冷却部６は、ガラスリボンＧ２を冷却しつつ搬送するための支持ローラ６ａを備えており、支持ローラ６ａよりも下方でアニール炉４内（第二ブース７ｂ内）に給気して、成形炉２内とアニール炉４内を加圧するものである。
　このような構成により、アニール炉４のうち冷却部６の気圧を高めることができ、切断室Ｃからアニール炉４にガラス粉塵が侵入することを確実に防ぐことができる。 That is, in the method for manufacturing a glass plate according to an embodiment of the present invention, the annealing furnace 4 is gradually cooled from the upper side, with the slow cooling part 5 for gradually cooling the glass ribbon G2 formed by the forming furnace 2. A cooling unit 6 for cooling the glass ribbon G2, the slow cooling unit 5 includes an annealing roller 5a for transporting the glass ribbon G2 while gradually cooling, and the cooling unit 6 cools the glass ribbon G2. However, a support roller 6a is provided for transporting, and air is supplied into the annealing furnace 4 (in the second booth 7b) below the support roller 6a to pressurize the inside of the forming furnace 2 and the annealing furnace 4. Is.
With such a configuration, the pressure of the cooling unit 6 in the annealing furnace 4 can be increased, and glass dust can be reliably prevented from entering the annealing furnace 4 from the cutting chamber C.
　また、本発明の一実施形態に係るガラス板の製造方法では、空調機１０によってブース７内に給気する空気の温度を調整することにより、煙突効果によってブース７内で生じる上昇気流をさらに抑制しており、アニール炉４においてガラスリボンＧ２へ異物（特にガラス粉塵）が付着することをより確実に抑制するようにしている。
　さらに、本発明の一実施形態に係るガラス板の製造方法では、空調機１０によってブース７内に給気する空気の清浄度を高くすることにより、ブース７内をクリーンルーム程度の清浄度に維持して、アニール炉４におけるガラスリボンＧ２へ異物（特にガラス粉塵）の付着をより確実に抑制するようにしている。 Moreover, in the manufacturing method of the glass plate which concerns on one Embodiment of this invention, by adjusting the temperature of the air supplied in the booth 7 with the air conditioner 10, the upward airflow which arises in the booth 7 by a chimney effect is further suppressed. In the annealing furnace 4, it is possible to more reliably prevent foreign matter (particularly glass dust) from adhering to the glass ribbon G2.
Furthermore, in the manufacturing method of the glass plate which concerns on one Embodiment of this invention, the inside of the booth 7 is maintained by the cleanliness degree of a clean room by making the cleanliness of the air supplied into the booth 7 with the air conditioner 10 high. Thus, the adhesion of foreign matter (particularly glass dust) to the glass ribbon G2 in the annealing furnace 4 is more reliably suppressed.
　即ち、本発明の一実施形態に係るガラス板の製造方法においては、アニール炉４内に、空調機１０によって温度調整された空気を給気するものであり、空調機１０はフィルタ装置１５を備えており、アニール炉４内に、空調機１０によって、フィルタ装置１５を通して清浄度を高めた空気を給気するものである。
　このような構成により、アニール炉４の内部でガラス粉塵がガラスリボンＧ２に付着することをより確実に防ぐことができる。 That is, in the method for manufacturing a glass plate according to an embodiment of the present invention, the air adjusted in temperature by the air conditioner 10 is supplied into the annealing furnace 4, and the air conditioner 10 includes the filter device 15. In the annealing furnace 4, air with increased cleanliness is supplied through the filter device 15 by the air conditioner 10.
With such a configuration, it is possible to more reliably prevent glass dust from adhering to the glass ribbon G2 inside the annealing furnace 4.
　また、本発明の一実施形態に係るガラス板の製造方法では、図１および図２に示すように、ガラス板製造設備１を構成する加圧ファン２０の給気量を調整して、該ガラス板製造設備１の成形徐冷室Ａの気圧を調整している。 Moreover, in the manufacturing method of the glass plate which concerns on one Embodiment of this invention, as shown to FIG. 1 and FIG. 2, the air supply amount of the pressurization fan 20 which comprises the glass plate manufacturing equipment 1 is adjusted, and this glass The pressure in the forming annealing chamber A of the plate manufacturing facility 1 is adjusted.
　具体的には、本発明の一実施形態に係るガラス板Ｇ３の製造方法では、差圧計Ｐ６によって、成形徐冷室Ａ（高圧側）と塔屋Ｅ（低圧側）の差圧を管理して、成形徐冷室Ａが塔屋Ｅに対して２０～３０Ｐａ程度の陽圧となるようにしている。 Specifically, in the manufacturing method of the glass plate G3 according to one embodiment of the present invention, the differential pressure between the forming annealing chamber A (high pressure side) and the tower E (low pressure side) is managed by the differential pressure gauge P6. The forming annealing chamber A is set to a positive pressure of about 20 to 30 Pa with respect to the tower E.
　本発明の一実施形態に係るガラス板の製造方法では、成形徐冷室Ａ（高圧側）と塔屋Ｅ（低圧側）の差圧を管理することで、ブース７からの上昇気流の漏れを抑制している。
　そして、本発明の一実施形態に係るガラス板の製造方法では、成形炉２およびアニール炉４内の上昇気流の風量を抑制することで、アニール炉４におけるガラスリボンＧ２の揺れを抑制することができ、ひいては、揺れに起因して生じるガラスリボンＧ２の歪みを抑制することができる。 In the manufacturing method of the glass plate which concerns on one Embodiment of this invention, the leak of the updraft from the booth 7 is suppressed by managing the differential pressure | voltage of the shaping | molding annealing chamber A (high pressure side) and the tower E (low pressure side). is doing.
And in the manufacturing method of the glass plate which concerns on one Embodiment of this invention, it can suppress the fluctuation | variation of the glass ribbon G2 in the annealing furnace 4 by suppressing the air volume of the updraft in the shaping furnace 2 and the annealing furnace 4. As a result, distortion of the glass ribbon G2 caused by shaking can be suppressed.
　このように、本発明の一実施形態に係るガラス板の製造方法では、加圧ファン２０で成形徐冷室Ａを加圧することにより得られるガラスリボンＧ２の歪み低減効果と、空調機１０によってブース７内を加圧することにより得られるガラスリボンＧ２の表面品質向上効果の相乗効果によって、ガラス板Ｇ３の品質をより向上させることができる。 Thus, in the manufacturing method of the glass plate which concerns on one Embodiment of this invention, the distortion reduction effect of the glass ribbon G2 obtained by pressurizing the shaping | molding slow cooling chamber A with the pressurization fan 20, and a booth by the air conditioner 10 The quality of the glass plate G3 can be further improved by the synergistic effect of the surface quality improvement effect of the glass ribbon G2 obtained by pressurizing the inside 7.
　即ち、本発明の一実施形態に係るガラス板の製造方法においては、さらに、成形炉２とアニール炉４が配置された空間である成形徐冷室Ａを加圧するものである。
　このような構成により、ブース７内の上昇気流を抑制することができ、ひいては、アニール炉４の内部でガラス粉塵がガラスリボンＧ２に付着することを防ぐとともに、ガラスリボンＧ２の揺れを抑制して、ガラスリボンＧ２の歪みを低減することができる。 That is, in the glass plate manufacturing method according to an embodiment of the present invention, the forming annealing chamber A, which is a space in which the forming furnace 2 and the annealing furnace 4 are arranged, is further pressurized.
With such a configuration, the upward air flow in the booth 7 can be suppressed, and consequently, the glass dust is prevented from adhering to the glass ribbon G2 inside the annealing furnace 4, and the shaking of the glass ribbon G2 is suppressed. The distortion of the glass ribbon G2 can be reduced.
　尚、本実施形態では、オーバーフローダウンドロー法によりガラス板Ｇ３を製造する場合を例示したが、本発明に係るガラス板の製造方法およびガラス板製造設備は、スロット（スリット）ダウンドロー法によりガラス板を製造する場合にも適用することができる。 In the present embodiment, the case where the glass plate G3 is manufactured by the overflow downdraw method has been exemplified. However, the glass plate manufacturing method and the glass plate manufacturing facility according to the present invention are manufactured by the slot (slit) downdraw method. The present invention can also be applied when manufacturing.
　本発明に係るガラス板製造設備およびガラス板の製造方法は、液晶ディスプレイ用、プラズマディスプレイ用、エレクトロルミネッセンスディスプレイ用、フィールドエミッションディスプレイ用等の種々のガラス基板を製造する場合に広く適用することができる。 The glass plate manufacturing equipment and the glass plate manufacturing method according to the present invention can be widely applied when manufacturing various glass substrates for liquid crystal displays, plasma displays, electroluminescence displays, field emission displays, and the like. .
　１　　ガラス板製造設備
　２　　成形炉
　３　　成形体
　４　　アニール炉
　５　　徐冷部
　５ａ　アニールローラ
　６　　冷却部
　６ａ　支持ローラ
　７　　ブース
　８　　切断装置
　１０　空調機
　１１　給気ファン
　１２　温調コイル
　１３　外気ダクト
　１４　給気ダクト
　１５　フィルタ装置
　Ａ　　成形徐冷室
　Ｂ　　冷却室
　Ｃ　　切断室
　Ｘ　　建屋
　Ｇ２　ガラスリボン
　Ｇ３　ガラス板 DESCRIPTION OF SYMBOLS 1 Glass plate manufacturing equipment 2 Molding furnace 3 Molded body 4 Annealing furnace 5 Slow cooling part 5a Annealing roller 6 Cooling part 6a Support roller 7 Booth 8 Cutting device 10 Air conditioner 11 Air supply fan 12 Temperature control coil 13 Outside air duct 14 Air supply duct 15 Filter device A Molding slow cooling chamber B Cooling chamber C Cutting chamber X Building G2 Glass ribbon G3 Glass plate

Claims (8)

  1. 　ダウンドロー法によりガラスリボンを成形するための成形体を備えた成形炉と、
    　前記成形炉の下方に連通し、前記成形炉により成形された前記ガラスリボンを、鉛直下方に搬送しつつ徐冷するアニール炉と、
    　前記アニール炉の下方に連通する空間に配置される、前記ガラスリボンを所定の寸法に切断する切断装置と、
    　前記アニール炉の内部の気圧を、
    　前記切断装置が配置される空間の気圧に比して高い気圧に加圧する加圧装置と、
    　を備える、
    　ことを特徴とするガラス板製造設備。     A molding furnace equipped with a molded body for molding a glass ribbon by a downdraw method;
    An annealing furnace that communicates with the lower part of the forming furnace and gradually cools the glass ribbon formed by the forming furnace while being conveyed vertically downward;
    A cutting device for cutting the glass ribbon into a predetermined dimension, which is disposed in a space communicating below the annealing furnace;
    The atmospheric pressure inside the annealing furnace,
    A pressurizing device for pressurizing to a higher pressure than the pressure of the space in which the cutting device is disposed;
    Comprising
    A glass plate manufacturing facility characterized by that.
  2. 　前記アニール炉は、
    　上方側から順に、
    　前記成形炉により成形された前記ガラスリボンを徐冷する徐冷部と、
    　徐冷した前記ガラスリボンを冷却する冷却部と、
    　を備え、
    　前記徐冷部は、
    　前記ガラスリボンを徐冷しつつ搬送するためのアニールローラを備えており、
    　前記冷却部は、
    　前記ガラスリボンを冷却しつつ搬送するための支持ローラを備えており、
    　前記加圧装置は、
    　前記支持ローラよりも下方で、前記アニール炉に接続される、
    　ことを特徴とする請求項１に記載のガラス板製造設備。     The annealing furnace is
    From the upper side,
    A slow cooling part for slowly cooling the glass ribbon formed by the molding furnace;
    A cooling part for cooling the glass ribbon that has been gradually cooled;
    With
    The slow cooling part is
    An annealing roller for conveying the glass ribbon while gradually cooling is provided,
    The cooling part is
    A support roller for transporting the glass ribbon while cooling,
    The pressure device is
    Below the support roller, connected to the annealing furnace,
    The glass plate manufacturing equipment according to claim 1.
  3. 　前記加圧装置は、
    　給気ファンと温調コイルとフィルタ装置を備えた空調機である、
    　ことを特徴とする請求項１または請求項２に記載のガラス板製造設備。     The pressure device is
    It is an air conditioner equipped with an air supply fan, temperature control coil and filter device.
    The glass plate manufacturing equipment according to claim 1 or 2, wherein
  4. 　ダウンドロー法によるガラス板製造方法であって、
    　ガラスリボンを成形するための成形体を備えた成形炉と、前記成形炉の下方に連通し、前記成形炉により成形された前記ガラスリボンを鉛直下方に搬送しつつ徐冷するアニール炉、の炉内を加圧して、
    　前記アニール炉の下方に連通し、前記ガラスリボンを所定の寸法に切断する切断装置が配置される空間の気圧に比して、前記成形炉と前記アニール炉内の気圧を高くする、
    　ことを特徴とするガラス板の製造方法。     A glass plate manufacturing method by a downdraw method,
    A furnace comprising: a molding furnace provided with a molded body for molding a glass ribbon; and an annealing furnace communicating with the lower part of the molding furnace and gradually cooling the glass ribbon formed by the molding furnace while being conveyed vertically downward Pressurize the inside,
    Communicating with the lower part of the annealing furnace, and increasing the pressure in the forming furnace and the annealing furnace as compared to the pressure in the space in which the cutting device for cutting the glass ribbon into a predetermined size is disposed,
    The manufacturing method of the glass plate characterized by the above-mentioned.
  5. 　前記アニール炉は、
    　上方側から順に、
    　前記成形炉により成形された前記ガラスリボンを徐冷する徐冷部と、
    　徐冷した前記ガラスリボンを冷却する冷却部と、
    　を備え、
    　前記徐冷部は、
    　前記ガラスリボンを徐冷しつつ搬送するためのアニールローラを備えており、
    　前記冷却部は、
    　前記ガラスリボンを冷却しつつ搬送するための支持ローラを備えており、
    　前記支持ローラよりも下方で前記アニール炉内に給気して、前記成形炉内と前記アニール炉内を加圧する、
    　ことを特徴とする請求項４に記載のガラス板の製造方法。     The annealing furnace is
    From the upper side,
    A slow cooling part for slowly cooling the glass ribbon formed by the molding furnace;
    A cooling part for cooling the glass ribbon that has been gradually cooled;
    With
    The slow cooling part is
    An annealing roller for conveying the glass ribbon while gradually cooling is provided,
    The cooling part is
    A support roller for transporting the glass ribbon while cooling,
    Air is supplied into the annealing furnace below the support roller to pressurize the molding furnace and the annealing furnace.
    The manufacturing method of the glass plate of Claim 4 characterized by the above-mentioned.
  6. 　前記アニール炉内に、
    　空調機によって温度調整された空気を給気する、
    　ことを特徴とする請求項４または請求項５に記載のガラス板の製造方法。     In the annealing furnace,
    Supplying air whose temperature is adjusted by an air conditioner,
    The method for producing a glass plate according to claim 4 or 5, wherein:
  7. 　前記空調機はフィルタ装置を備えており、
    　前記アニール炉内に、
    　前記空調機によって、前記フィルタ装置を通して清浄度を高めた前記空気を給気する、
    　ことを特徴とする請求項６に記載のガラス板の製造方法。     The air conditioner includes a filter device,
    In the annealing furnace,
    The air that has increased the cleanliness through the filter device is supplied by the air conditioner.
    The manufacturing method of the glass plate of Claim 6 characterized by the above-mentioned.
  8. 　さらに、
    　前記成形炉と前記アニール炉が配置された空間を加圧する、
    　ことを特徴とする請求項４～請求項７の何れか一項に記載のガラス板の製造方法。     further,
    Pressurizing the space in which the forming furnace and the annealing furnace are disposed;
    The method for producing a glass plate according to any one of claims 4 to 7, wherein:
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