KR20160002341A - Method for manufacturing glass plate and apparatus for manufacturing glass plate - Google Patents

Method for manufacturing glass plate and apparatus for manufacturing glass plate Download PDF

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KR20160002341A
KR20160002341A KR1020150066861A KR20150066861A KR20160002341A KR 20160002341 A KR20160002341 A KR 20160002341A KR 1020150066861 A KR1020150066861 A KR 1020150066861A KR 20150066861 A KR20150066861 A KR 20150066861A KR 20160002341 A KR20160002341 A KR 20160002341A
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South Korea
Prior art keywords
glass plate
guide
main surface
guide member
gas
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KR1020150066861A
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Korean (ko)
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KR101740790B1 (en
Inventor
준야 즈지
마사까즈 데라니시
히로노리 이세
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아반스트레이트 가부시키가이샤
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G49/00—Conveying systems characterised by their application for specified purposes not otherwise provided for
    • B65G49/05—Conveying systems characterised by their application for specified purposes not otherwise provided for for fragile or damageable materials or articles
    • B65G49/06—Conveying systems characterised by their application for specified purposes not otherwise provided for for fragile or damageable materials or articles for fragile sheets, e.g. glass
    • B65G49/063—Transporting devices for sheet glass
    • B65G49/064—Transporting devices for sheet glass in a horizontal position
    • B65G49/065—Transporting devices for sheet glass in a horizontal position supported partially or completely on fluid cushions, e.g. a gas cushion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G49/00—Conveying systems characterised by their application for specified purposes not otherwise provided for
    • B65G49/05—Conveying systems characterised by their application for specified purposes not otherwise provided for for fragile or damageable materials or articles
    • B65G49/06—Conveying systems characterised by their application for specified purposes not otherwise provided for for fragile or damageable materials or articles for fragile sheets, e.g. glass
    • B65G49/061—Lifting, gripping, or carrying means, for one or more sheets forming independent means of transport, e.g. suction cups, transport frames
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
    • C03B35/14—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands
    • C03B35/22—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands on a fluid support bed, e.g. on molten metal
    • C03B35/24—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands on a fluid support bed, e.g. on molten metal on a gas support bed

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  • Chemical & Material Sciences (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)

Abstract

An object of the present invention is to provide a glass plate manufacturing method and a glass plate manufacturing apparatus capable of reducing the vibration of the glass plate in the inspection process of the glass plate.
The glass plate manufacturing method includes a conveying step and a suppressing step. The transporting step transports the glass plate 10 in the first direction. The suppressing process suppresses the movement of the glass plate in the second direction intersecting with the first direction. The suppressing step has a first gas supplying step and a second gas supplying step. The first gas supplying step is a step in which the first gas is caused to flow along the first main surface at the first gap between the first main surface 10a of the glass plate and the first guide members 118a and 118c, The force directed toward the member is given to the glass plate. The second gas supplying step is a step of supplying the second gas to the second main surface 10b and the second guide members 118b and 118d in the second gap between the second main surface 10b and the second main surface The force directed toward the second guide member is given to the glass plate.

Figure P1020150066861

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a glass plate manufacturing method,

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

In the manufacturing process of the glass plate, an inspection process for inspecting the glass plate cut to a predetermined size is performed. In the inspection step, defects such as scratches and specks formed on the surface of the glass plate, for example, are detected by an optical method.

Patent Document 1 (Japanese Patent Application Laid-Open No. 2009-236771) discloses an example of a glass plate inspection apparatus. This inspection apparatus has an upper holding means for holding the upper side of the glass plate and a lower holding means for holding the lower side of the glass plate. This inspection apparatus relatively moves the glass plate relative to the apparatus for detecting defects of the glass plate in a state in which the upper gripping means and the lower gripping means are separated from each other and tension is applied to the glass plate in the vertical direction.

Japanese Patent Application Laid-Open No. 2009-236771

However, in the inspection apparatus disclosed in Patent Document 1 (Japanese Patent Laid-Open Publication No. 2009-236771), since the upper holding means and the lower holding means give the vertical tension to the glass plate, When a large and thin glass plate is held, the glass plate may be broken.

Further, in order to detect defects of the glass plate with high accuracy while moving the glass plate, it is necessary to stabilize the posture of the glass plate to suppress the vibration of the glass plate. Particularly, it is important to stabilize the direction of the normal of the surface of the glass plate and to reduce the vibration in the direction of the normal to the surface of the glass plate.

An object of the present invention is to provide a glass plate manufacturing method and a glass plate manufacturing apparatus capable of reducing the vibration of the glass plate in the inspection process of the glass plate.

A glass plate manufacturing method according to the present invention comprises a conveying step and a suppressing step. The transporting step transports the glass plate in the first direction. The suppressing process suppresses the movement of the glass plate in the second direction intersecting with the first direction when the glass plate is transported in the first direction. The suppressing step has a first gas supplying step. The first gas supplying step is a step of supplying the first gas to the first main surface of the glass plate by flowing the first gas along the first main surface in the first gap between the first main surface of the glass plate and the first guide member arranged to face the first main surface, 1 The force directed toward the guide member is given to the glass plate.

In general, a large-sized thin glass plate is liable to vibrate in a direction orthogonal to the main surface of the glass plate due to minute changes in the pressure around the glass plate when no force is applied during transportation. However, in the glass plate manufacturing method according to the present invention, one main surface of the glass plate being conveyed is subjected to a force directed toward a guide member opposed to the main surface thereof. Since the gas flows between the main surface of the glass plate and the guide member, the glass plate does not collide with the guide member, and the distance between the glass plate and the guide member is stably maintained. Therefore, the glass plate being conveyed is hardly subjected to a change in force in a direction orthogonal to the main surface thereof. Therefore, the glass plate manufacturing method according to the present invention can reduce the vibration of the glass plate.

It is preferable that the suppressing step further includes a second gas supplying step. The second gas supplying step is a step of supplying the second gas to the second main surface in the second gap between the second main surface which is the back surface side of the first main surface and the second guide member which is arranged to face the second main surface, The force directed toward the second guide member is given to the glass plate.

In this glass plate manufacturing method, a pair of main surfaces of the glass plate being conveyed are subjected to forces in mutually opposite directions. When each of the pair of main surfaces receives the same amount of force, the forces acting on the glass plate in a direction orthogonal to the main surface are balanced. Therefore, the glass plate being conveyed is hardly subjected to a change in force in a direction orthogonal to the main surface thereof. Therefore, the glass plate manufacturing method according to the present invention can reduce the vibration of the glass plate.

Also, in the step of measuring the end face, in the first gas supplying step, the first gas is jetted toward the first guide member to flow along the surface of the first guide member to be guided to the first gap, In the process, it is preferable that the second base body is jetted toward the second guide member, so that it flows along the surface of the second guide member and is guided to the second gap.

Further, in the carrying step, it is preferable that the glass plate is transported in a first direction parallel to the end in a suspended state by holding one end of the glass plate. In this case, in the first gas supplying step, the first gas flows through a first gap which gradually narrows along the first direction, and in the second gas supplying step, the second gas gradually flows along the first direction The discharge flows through the second gap.

Further, it is preferable to further include an inspection process for inspecting the glass plate. In this case, the suppression process is performed at least before the inspection process.

In this glass plate manufacturing method, since the vibration of the glass plate conveyed in the conveying step is reduced, deterioration in the accuracy of detecting defects of the glass plate is suppressed in the inspection step.

A glass plate producing apparatus according to the present invention comprises a table for fixing a glass plate, a chamfer grinding wheel for chamfering an end face of the glass plate, a transporting mechanism, and a restraining mechanism. The transport mechanism is a mechanism for transporting the glass plate in the first direction. The restricting mechanism is a mechanism for suppressing the movement of the glass plate in the second direction crossing the first direction when the glass plate is transported in the first direction. The suppression mechanism has a first guide member, a second guide member, a first gas ejection mechanism, and a second gas ejection mechanism. The first guide member has a first guide surface facing the first main surface of the glass plate. The second guide member has a second guide surface opposed to the second main surface which is the back surface side of the first main surface. The first gas ejection mechanism ejects the first gas toward the first guide surface. The second gas ejection mechanism ejects the second gas toward the second guide surface. The first gas ejection mechanism causes the first gas to flow along the first main surface at a first gap between the first main surface and the first guide surface to impart a force toward the first guide member to the glass plate. The second gas ejection mechanism causes the second gas to flow along the second main surface at a second gap between the second main surface and the second guide surface to impart a force directed toward the second guide member to the glass plate.

Further, the first guide member causes the first gas to flow along the first guide surface to guide the first gas to the first gap, the second guide member to flow the second gas along the second guide surface, 2 gas to the second gap.

It is also preferable that the transport mechanism transports the glass plate in the first direction parallel to the end portion while holding the glass plate by holding one end of the glass plate. In this case, the first guide member has a first guide surface that gradually approaches the first main surface along the first direction, and the second guide member has a second guide surface that gradually approaches the second main surface along the first direction, And has a guide surface.

Further, it is preferable to further include an inspection mechanism for inspecting the glass plate. In this case, the restraining mechanism is provided at least on the upstream side of the inspection mechanism in the first direction.

Further, it is preferable that the restraining mechanism is further provided on the downstream side of the inspection mechanism in the first direction.

In this glass plate manufacturing apparatus, the vibration of the glass plate on the upstream side of the inspection mechanism can be further reduced by reducing the vibration of the glass plate not only on the upstream side of the inspection apparatus but also on the downstream side of the inspection apparatus. Therefore, the glass plate manufacturing apparatus can more effectively suppress deterioration in the accuracy of detecting defects of the glass plate by the inspection mechanism.

It is also preferable to provide a plurality of restraining mechanisms provided on the upstream side of the inspection mechanism in the first direction. In this case, in each of the plurality of restraining mechanisms, the minimum distance between the first main surface and the first guide surface and the minimum distance between the second main surface and the second guide surface gradually decrease along the first direction.

The glass plate manufacturing method and the glass plate manufacturing apparatus according to the present invention can reduce the vibration of the glass plate in the inspection process of the glass plate.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an example of a flowchart showing a manufacturing process of a glass plate. Fig.
2 is a perspective view of a glass plate manufacturing apparatus according to an embodiment.
Fig. 3 is a side view of the glass plate manufacturing apparatus, viewed from the direction of arrow III in Fig. 2; Fig.
4 is a top view of the glass plate manufacturing apparatus viewed from the direction of arrow IV in Fig.
5 is a view for explaining a flow of air discharged from an air knife and guided by a guide plate;
6 is a view for explaining an example of the dimensions and positions of the air knife and the guide plate;
7 is a view for explaining an example of dimensions and positions of the air knife and the guide plate, and is viewed from the direction of arrow VII in Fig.
8 is a top view of a glass plate manufacturing apparatus according to Modification B. Fig.
Fig. 9 is a top view of a glass plate manufacturing apparatus according to Modification C; Fig.

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to the drawings. The glass plate manufacturing apparatus 100 according to the present embodiment mainly includes a transport apparatus 102 for transporting the glass plate 10 and an inspection apparatus 104 for inspecting the glass plate 10 transported by the transport apparatus 102 .

(1) Overview of manufacturing process of glass plate

First, the manufacturing process of the glass plate 10 will be described. The glass plate 10 is used for manufacturing a flat panel display (FPD) such as a liquid crystal display, a plasma display, and an organic EL display. The glass plate 10 has a thickness of, for example, 0.2 mm to 0.8 mm and a size of 680 mm to 2200 mm in length and 880 mm to 2500 mm in width.

As an example of the glass plate 10, glass having the following composition (a) to (j) can be mentioned.

(a) 50% by mass to 70% by mass of SiO 2 ,

(b) 10 to 25% by mass of Al 2 O 3 ,

(c) B 2 O 3 : 1 mass% to 18 mass%

(d) 0 mass% to 10 mass% of MgO,

(e) CaO: 0 mass% to 20 mass%

(f) 0 mass% to 20 mass% of SrO,

(g) 0 mass% to 10 mass% of BaO,

(h) RO: 5 mass% to 20 mass% (R is at least one selected from Mg, Ca, Sr and Ba)

(i) R ' 2 O: 0 mass% to 2.0 mass% (R' is at least one selected from Li, Na and K)

(j) at least one metal oxide selected from SnO 2 , Fe 2 O 3 and CeO 2 .

In addition, the glass having the above composition is allowed to have other trace components in the range of less than 0.1% by mass.

Fig. 1 is an example of a flowchart showing the manufacturing process of the glass plate 10. Fig. The manufacturing process of the glass plate 10 mainly includes a forming step (step S1), a plate taking-out step (step S2), a first inspecting step (step S3), a cutting step (step S4) (Step S5), an end face machining step (step S6), a cleaning step (step S7), a second inspection step (step S8), and a packaging step (step S9).

In the molding step (S1), the glass sheet is continuously formed from the molten glass obtained by heating the glass raw material by the down-draw method or the float method. The molded glass sheet is cooled to below the freezing point of the glass while being controlled in temperature so as to prevent deformation and warping.

In the plate taking-out step (S2), the glass sheet formed in the forming step (S1) is cut to obtain a plate glass having a predetermined dimension.

In the first inspection step (S3), the glass platen glass obtained in the plate taking-out step (S2) is inspected by the glass plate manufacturing apparatus (100). In the first inspection step (S3), mainly, light-transmitting and non-light-permeable foreign materials present inside the glass plate are detected. The foreign matter is, for example, a glass raw material component, a metal, and minute bubbles. Further, in the first inspection step (S3), fines and scratches present on the main surface of the glass plate may be detected.

In the cutting step (S4), the platelet-like glass obtained in the first inspection step (S3) is cut to obtain the glass plate (10) of the product size. The glass plate is cut with high precision using a laser.

In the roughening step (S5), roughening treatment is carried out to increase the surface roughness of the main surface of the glass sheet (10) obtained in the cutting step (S4). The roughening treatment of the glass plate 10 is, for example, wet etching using an etchant containing hydrogen fluoride.

In the end face machining step (S6), chamfering of the end face of the glass plate (10) subjected to the roughening treatment in the roughening step (S5) is performed. A part of the chamfered end face has an R shape.

In the cleaning step S7, the glass plate 10 on which the chamfering of the end face is performed in the end face machining step (S6) is cleaned. The glass plate 10 is adhered with minute glass fragments generated by the cutting of the glass plate 10 and processing of the end face of the glass plate 10 and foreign substances such as organic substances existing in the atmosphere. By the cleaning of the glass plate 10, these foreign substances are removed.

In the second inspection step (S8), the glass plate (10) cleaned in the cleaning step (S7) is inspected. Specifically, the main surface of the glass plate 10 is optically measured, and defects of the glass plate 10 are detected. The defects of the glass plate 10 are caused by, for example, flaws formed on the main surface of the glass plate 10, scratches and cracks present on the main surface of the glass plate 10, foreign substances adhering to the main surface of the glass plate 10, And minute bubbles existing in the interior of the glass plate 10 and the like.

In the packaging process (S9), the glass plate (10) passed the inspection in the second inspection process (S8) is stacked and packed on a pallet alternately with the laminate for protecting the glass plate (10). The packaged glass plate 10 is shipped to manufacturers of FPDs and the like.

(2) Configuration of glass plate manufacturing apparatus

The glass plate manufacturing apparatus 100 optically inspects the defects of the platen glass by the inspection apparatus 104 while the platen glass is transported by the transport apparatus 102 in the first inspection step S3. Defects are mainly foreign substances such as minute bubbles existing inside the glass plate. 2 is a perspective view of the glass-sheet manufacturing apparatus 100. Fig. 3 is a side view of the glass plate manufacturing apparatus 100, viewed from the direction of arrow III shown in Fig. 4 is a top view of the glass plate manufacturing apparatus 100 as viewed from the direction of the arrow IV shown in Fig. The glass plate manufacturing apparatus 100 is installed in a space controlled to have a constant pressure. Hereinafter, the glass plate 10 transported by the transport apparatus 102 and inspected by the inspection apparatus 104 is referred to as a glass plate 10 for convenience.

(2-1) Configuration of conveying device

The transport apparatus 102 transports the glass plate 10 in the upright state in the horizontal direction. The normal line of the main surface of the glass plate 10 conveyed by the conveyer 102 is parallel to the horizontal direction. Figs. 2 to 4 show an X-axis, a Y-axis and a Z-axis, which constitute an orthogonal coordinate system in a three-dimensional space. The X-axis is parallel to the conveying direction of the glass plate 10. The Y-axis is parallel to the normal of the main surface of the glass plate 10. The Z axis is parallel to the vertical direction and orthogonal to the normal line of the main surface of the glass plate 10. [

The direction of the X axis is the direction in which the glass plate 10 is transported. Hereinafter, the negative direction of the X-axis is referred to as the upstream side, and the positive direction of the X-axis is referred to as the downstream side. The glass plate 10 is transported from the upstream side toward the downstream side. As shown in Fig. 4, when viewed from the upstream side toward the downstream side, the right side of the glass plate 10 is defined as the negative direction of the Y axis, and the left side of the glass plate 10 is defined as the positive direction of the Y axis. The direction of the Z axis is upward in the vertical direction.

The transport apparatus 102 mainly includes an upper guide mechanism 110, a clamp mechanism 112, a lower guide mechanism 114, a plurality of air knives 116a, ..., and a plurality of guide plates 118a, ...). Hereinafter, the left main surface 10a of the glass plate 10 is referred to as the left main surface 10a, and the right main surface of the glass plate 10 is referred to as the right main surface 10b.

(2-1-1) Upper guide mechanism

The upper guide mechanism 110 is a guide rail extending along the X-axis direction above the glass plate 10 to be transported. In the upper guide mechanism 110, a clamp mechanism 112 is mounted. The upper guide mechanism 110 includes a drive mechanism (not shown) for moving the clamp mechanism 112 in the X-axis direction.

(2-1-2) Clamp Mechanism

The clamping mechanism 112 holds the upper end of the glass plate 10, which is an end portion in the Z-axis normal direction. The clamp mechanism 112 mainly includes a base portion 112a and a plurality of grip portions 112b. The base portion 112a is a member extending along the X-axis direction. The base portion 112a is mounted on the upper guide mechanism 110 so as to be slidable with respect to the upper guide mechanism 110. [ The base portion 112a can move in the X-axis direction by sliding with the upper guide mechanism 110. [ On the lower side of the base portion 112a, a plurality of grip portions 112b are mounted at regular intervals along the X-axis direction. The grip portion 112b holds the upper end of the glass plate 10 and fixes the glass plate 10 to the clamping mechanism 112. [ The number of the grip portions 112b and the mounting position of the grip portion 112b with respect to the base portion 112a may be set appropriately in accordance with the dimensions of the glass plate 10 and the conveying speed of the glass plate 10. [

The clamp mechanism 112 is carried in the X-axis direction by the upper guide mechanism 110. [ Thereby, the transport apparatus 102 can transport the glass plate 10 gripped by the clamp mechanism 112 in the X-axis direction.

(2-1-3) Lower guide mechanism

The lower guide mechanism 114 is a member extending along the X-axis direction. A slit 114a is formed along the X-axis direction on the end face of the lower guide mechanism 114 in the positive Z-axis direction. The slit 114a is a space in which a lower end portion, which is an end in the Z-axis direction direction of the glass plate 10 to be transported, is accommodated. The lower end of the glass plate 10 does not contact the bottom of the slit 114a. The lower guide mechanism 114 suppresses the movement of the lower end of the glass plate 10 conveyed by the upper guide mechanism 110 in the Y-axis direction.

(2-1-4) Air knife

The air knives 116a are devices for spraying air (jet flow) toward the main surfaces 10a and 10b of the glass plate 10. The air knives 116a, ... are disposed on both sides of the glass plate 10.

The air knives 116a, ... have discharge holes (not shown) through which air is divided. The discharge hole is an elongated hole formed in the tip portion of the air knives 116a, ... and extending in the Z-axis direction. The air knives 116a have a regulator (not shown) for controlling the amount of air discharged from the discharge holes. The regulator is, for example, a pressure regulating valve. The air knives 116a, ... have a wind direction adjustment mechanism (not shown) for controlling the direction of the air discharged from the discharge holes in the XY plane. The air-direction adjusting mechanism is, for example, a mechanism for controlling the posture of the air knives 116a, .... The air knives 116a have an effect of stabilizing the posture of the glass plate 10 by suppressing the movement of the glass plate 10 conveyed in the Y-axis direction, as will be described later.

As shown in Fig. 4, the glass plate manufacturing apparatus 100 includes four air knives 116a, 116b, 116c, and 116d. The four air knives 116a, 116b, 116c, and 116d are connected to the first left air knife 116a, the first right air knife 116b, the second left air knife 116c, And is referred to as a second right air knife 116d.

The first left air knife 116a and the second left air knife 116c are disposed on the left side of the glass plate 10. The first right air knife 116b and the second right air knife 116d are disposed on the right side of the glass plate 10. The first left air knife 116a and the first right air knife 116b are disposed on the upstream side of the second left air knife 116c and the second right air knife 116d. The first left air knife 116a is disposed at the same position as the first right air knife 116b and the second left air knife 116c is disposed at the same position as the second right air knife 116d As shown in Fig. The distance between the first left air knife 116a and the left main surface 10a is equal to the distance between the first right air knife 116b and the right main surface 10b. The distance between the second left air knife 116c and the left main surface 10a is equal to the distance between the second right air knife 116d and the right main surface 10b.

The first left air knife 116a and the second left air knife 116c inject air toward the center of the left main surface 10a in the Z-axis direction. The first right air knife 116b and the second right air knife 116d inject air toward the center of the right main surface 10b in the Z-axis direction.

(2-1-5) Guide plate

The guide plates 118a, ... are members arranged against the main surfaces 10a, 10b of the glass plate 10, respectively. The guide plates 118a, ... are disposed on both left and right sides of the glass plate 10, respectively. The number of the guide plates 118a, ... is the same as the number of the air knives 116a, ....

The guide plates 118a, ... have a position adjusting mechanism (not shown) for adjusting the position in the Y-axis direction and an angle adjusting mechanism (not shown) for controlling the direction in the XY plane. The guide plates 118a are members for guiding the air discharged from the air knives 116a to the space between the guide plates 118a and the glass plate 10 as described later.

As shown in Fig. 4, the glass plate manufacturing apparatus 100 includes four guide plates 118a, 118b, 118c and 118d. The four guide plates 118a, 118b, 118c and 118d are connected to the first left guide plate 118a, the first right guide plate 118b, the second left guide plate 118c, And is referred to as a second right guide plate 118d.

The first left guide plate 118a and the second left guide plate 118c are disposed on the left side of the glass plate 10. [ The first right guide plate 118b and the second right guide plate 118d are disposed on the right side of the glass plate 10. [ The first left guide plate 118a and the first right guide plate 118b are disposed on the upstream side of the second left guide plate 118c and the second right guide plate 118d. The first left guide plate 118a is disposed at the same position as the first right guide plate 118b in the X axis direction and the Z axis direction and the second left guide plate 118c is disposed at the same position as the second right guide plate 118d As shown in Fig.

The first left guide plate 118a has a first left guide surface 119a facing the left main surface 10a. The first right guide plate 118b has a first right guide surface 119b facing the right main surface 10b. The second left guide plate 118c has a second left guide surface 119c facing the left main surface 10a. The second right guide plate 118d has a second right guide surface 119d opposed to the right main surface 10b. In the X-axis direction, the distance between the first left guide surface 119a and the left main surface 10a is equal to the distance between the first right guide surface 119b and the right main surface 10b. In the X-axis direction, the distance between the second left guide surface 119c and the left main surface 10a is equal to the distance between the second right guide surface 119d and the right main surface 10b.

Next, the effect of the first left guide plate 118a will be described with reference to the drawings. The following description is also applicable to the other guide plates 118b, 118c and 118d.

The first left guide plate 118a moves the air discharged from the first left air knife 116a along the first left guide surface 119a so that the first left guide surface 119a and the left main surface 10a To the space between them. 5 is a view for explaining the flow of air discharged from the first left air knife 116a and guided by the first left guide plate 118a. 5 is a top view similar to Fig. In Fig. 5, the flow of air is indicated by white arrows F1 to F4. As shown in Fig. 5, the first left guide surface 119a of the first left guide plate 118a has a guide curved surface 119a1 and a guide plane 119a2. The guide curved surface 119a1 is a surface gradually approaching the left main surface 10a from the upstream side toward the downstream side. The guide plane 119a2 is a plane located on the downstream side of the guide curved surface 119a1 and parallel to the left main surface 10a. The guide curved surface 119a1 is smoothly connected to the guide surface 119a2. That is, the first left guide surface 119a gradually approaches the left main surface 10a from the upstream side toward the downstream side. The distance between the guide plane 119a2 and the left main surface 10a is the minimum value of the distance between the first left guide surface 119a and the left main surface 10a.

With reference to Fig. 5, the flow of air discharged from the first left air knife 116a will be described. First, the air is discharged from the discharge hole of the first left air knife 116a toward the guide curved surface 119a1 of the first left guide plate 118a (arrow F1). At this time, due to the Coanda effect, the group of the discharged air is pulled close to the first left guide plate 118a. As a result, the air flows along the guide curved surface 119a1 (arrow F2). At this time, the air flowing along the guide curved surface 119a1 attracts the ambient air (arrow F3) due to the nature of the draw of the surrounding fluid at this time. The air drawing in the surrounding air flows along the X-axis direction in the space between the guide plane 119a2 and the left main surface 10a (arrow F4).

On the downstream side of the first left guide plate 118a, there is provided a suction mechanism (not shown) for sucking the gas. The air that has passed through the space between the guide plane 119a2 and the left main surface 10a is sucked by the suction mechanism.

(2-2) Configuration of test apparatus

The inspection apparatus 104 detects foreign substances present inside the glass plate 10 by an optical method. The inspection apparatus 104 is provided on the downstream side of the air knives 116a, ... and guide plates 118a, ....

The inspection apparatus 104 mainly includes a light source 120 and a line sensor 122. The light source 120 is provided on the left side of the glass plate 10. The line sensor 122 is provided on the right side of the glass plate 10 so as to face the light source 120. The light source 120 irradiates the line light extending in the Z-axis direction toward the negative direction of the Y-axis. The line sensor 122 has a plurality of cameras 122a arranged in the Z-axis direction. The line sensor 122 receives the line light emitted from the light source 120 and passed through the glass plate 10 to the camera 122a. The line sensor 122 detects the deformation of the glass plate 10 based on the change in the intensity of the received line light and detects foreign matter present inside the glass plate 10. [ The focus area of the camera 122a of the line sensor 122 is ± 5 mm or less.

(3) Specific examples of glass plate manufacturing apparatus

An example of the configuration of the glass plate manufacturing apparatus 100 will be described. 6 and 7 are views for explaining the dimensions and positions of the first left air knife 116a and the first left guide plate 118a. Fig. 6 is a side view similar to Fig. 3; Fig. 7 is a part of a top view similar to Fig. 4, and is a view seen from the direction of an arrow VII shown in Fig. 6 and 7, only the glass plate 10, the first left air knife 116a, the second left air knife 116c, the first left guide plate 118a and the second left guide plate 118c are shown have. The dimension L1 of the glass plate 10 in the X-axis direction is 2400 mm. The dimension L2 of the glass plate 10 in the Z-axis direction is 1550 mm. The conveying speed of the glass plate conveyed in the X-axis direction by the conveying device 102 is 1200 mm / s. The following description is applicable to other air knives 116b, 116c, and 116d and other guide plates 118b, 118c, and 118d.

In Fig. 6, the dimension L3 of the first left air knife 116a in the Z-axis direction is 627 mm. The dimension L4 of the first left guide plate 118a in the Z-axis direction is 693 mm. The center position of the first left air knife 116a in the Z-axis direction is the same as the center position of the first left guide plate 118a in the Z-axis direction. The distance L5 between the upper end of the glass plate 10 and the upper end of the first left air knife 116a is 376 mm. The distance L6 between the lower end of the glass plate 10 and the lower end of the first left air knife 116a is 547 mm.

In Fig. 7, the dimension L7 of the first left guide plate 118a in the X-axis direction is 845 mm. The guide curved surface 119a1 of the first left guide plate 118a has an R shape in the XY plane and has a diameter L8 of 300 mm. The dimension L9 in the X-axis direction of the guide plane 119a2 of the first left guide plate 118a is 195 mm. The distance L10 between the guide plane 119a2 and the left main surface 10a is 10 mm. The first left air knife 116a is disposed so as to approach the left main surface 10a from the upstream side toward the downstream side. The minimum value L11 of the distance between the first left air knife 116a and the left main surface 10a is 32 mm. The angle? Between the first left air knife 116a and the left main surface 10a is 30 degrees. The maximum value of the velocity of the air flowing through the space between the guide plane 119a2 of the first left guide plate 118a and the left main surface 10a is 1.0 m / s to 2.0 m / s. It is preferable that the speed of the air flowing through the space between the guide plane 119a2 and the left main surface 10a is adjusted in accordance with the conveying speed of the glass plate 10 and is larger than the conveying speed of the glass plate 10. [

The larger the dimension of the first left air knife 116a and the first left guide plate 118a in the Z-axis direction is, the more preferable. The center position of the first left air knife 116a and the first left guide plate 118a in the Z-axis direction is preferably closer to the center position of the glass plate 10 in the Z-axis direction.

The numerical values L3 to L11 and the above-described numerical values relating to the dimensions and positions of the first left air knife 116a and the first left guide plate 118a are only examples, and the dimensions L1 and L2 of the glass plate 10, And is appropriately set in accordance with the conveying speed.

(4) Features

The glass plate manufacturing apparatus 100 is configured such that the glass plate 10 is transported in the X axis direction by the transport apparatus 102 and the glass plate 10 is transported by the inspection apparatus 104 in the first inspection step S3 The foreign substance present inside is detected by an optical method.

Air discharged from the air knives 116a, ... is injected onto the main surfaces 10a, 10b of the glass plate 10 conveyed by the transfer device 102. [ The air is guided by the guide plates 118a, ..., and flows in the space between the guide plates 118a, ... and the glass plate 10 along the X-axis direction.

The action of the air discharged from the first left air knife 116a and guided by the first left guide plate 118a will be described with reference to Fig. 5, the air ejected from the first left air knife 116a flows along the guide curved surface 119a1 while drawing ambient air, and is guided by the guide plane 119a2 and the left main surface 10a ). ≪ / RTI > The space between the first left guide plate 118a and the glass plate 10 is a flow path of air discharged from the first left air knife 116a and gradually narrows from the upstream side toward the downstream side. Thus, in the space between the first left guide plate 118a and the glass plate 10, the flow velocity of the air gradually increases from the upstream side toward the downstream side. Particularly, in the space between the guide plane 119a2 and the left main surface 10a, the flow velocity of the air is maximized. By the Bernoulli's theorem, as the air flow rate increases, the pressure of the air decreases, so that the space between the guide plane 119a2 and the left main surface 10a becomes negative with respect to the surrounding space. As a result, the glass plate 10 receives a force in the Y-axis direction toward the first left guide plate 118a. Similarly, the air discharged from the first right air knife 116b and guided by the first right guide plate 118b causes the glass plate 10 to generate a force in the Y axis direction toward the first right guide plate 118b Receive. Further, the glass plate 10 receives a force in the Y-axis direction toward the second left guide plate 118c and a force in the Y-axis direction toward the second right guide plate 118d. Thus, the glass plate 10 is transported in the X-axis direction while receiving the force in the positive direction of the Y-axis and the force in the negative direction of the Y-axis.

The region where the force in the Y-axis direction which the glass plate 10 receives by the action of the guide plates 118a ... is maximized in the region facing the guide plates 118a ..., Area. The central region of the glass plate 10 in the Z-axis direction extends from the clamp mechanism 112 for gripping the glass plate 10 and the lower guide mechanism 114 for suppressing the movement of the glass plate 10 in the Y- Includes the most distant point in the direction. Therefore, when no force is applied in the Y-axis direction, the center region in the Z-axis direction of the glass plate 10 being transported is shifted to Y It is likely to vibrate in the axial direction.

However, in the present embodiment, the glass plate 10 conveyed by the conveyance apparatus 102 is given a force in the positive and negative directions of the Y-axis in the central region in the Z-axis direction. When the magnitude of the force in the positive direction of the Y axis is equal to the magnitude of the force in the negative direction of the Y axis, the force in the Y axis direction acting on the glass plate 10 is balanced. As a result, the glass plate 10 being conveyed is less likely to receive a change in force in the Y-axis direction in the central region in the Z-axis direction. Therefore, the vibration in the Y-axis direction of the glass plate 10 is reduced.

The force in the Y axis direction applied to the glass plate 10 being conveyed is adjusted by adjusting the flow rate and direction of the air discharged from the air knives 116a and the positions and angles of the guide plates 118a, , And can be controlled with high precision. Therefore, the glass plate manufacturing apparatus 100 can easily reduce the vibration in the Y-axis direction of the glass plate 10 being transported.

The air having passed through the space between the guide plane 119a2 of the first left guide plate 118a and the left main surface 10a of the glass plate 10 is sucked by the suction mechanism. This stabilizes the airflow along the left main surface 10a in the space between the guide plane 119a2 and the left main surface 10a and reduces the vibration of the glass plate 10 in the Y-axis direction.

When the glass plate 10 conveyed by the conveying apparatus 102 vibrates in the Y axis direction, the focus position of the camera 122a of the line sensor 122 of the inspection apparatus 104 is shifted, The detection accuracy of the foreign matter present inside the sensor is deteriorated. When the focus area of the camera 122a of the line sensor 122 is as short as +/- 3 mm or less, a high precision is required at the focal position of the camera 122a, so that detection of foreign matters existing in the glass plate 10 The accuracy is lowered. Therefore, the glass plate manufacturing apparatus 100 can reduce the vibration of the glass plate 10 being conveyed, and can suppress the amplitude of vibration in the Y-axis direction of the glass plate 10 to 1 mm or less. It is possible to suppress deterioration in the detection accuracy of the foreign substance present in the exhaust gas.

(5) Modifications

Although the embodiments of the glass plate manufacturing apparatus according to the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications and changes may be made without departing from the gist of the present invention.

(5-1) Modification Example A

The glass plate manufacturing apparatus 100 of the embodiment has four air knives 116a, 116b, 116c and 116d and four guide plates 118a, 118b, 118c and 118d. The number of the air knives 116a and the number of the guide plates 118a ... provided in the glass sheet manufacturing apparatus 100 is set to be equal to or greater than the dimension L1 of the glass sheet 10 and the conveyance speed of the glass sheet 10 Therefore, it may be appropriately set.

The larger the number of the air knives 116a and the guide plates 118a provided in the glass plate manufacturing apparatus 100 becomes, the more stable the flow of air along the main surfaces 10 and 10b of the glass plate 10 becomes , The Y-axis direction vibration of the conveyed glass plate 10 is more effectively suppressed. Therefore, even if airflow in the Y-axis direction is generated in the space in which the glass plate manufacturing apparatus 100 is installed, the vibration in the Y-axis direction of the glass plate 10 is sufficiently suppressed, And deterioration of the detection accuracy is suppressed.

(5-2) Variation B

In the glass plate manufacturing apparatus 100 of the embodiment, the air knives 116a and the guide plates 118a are provided on the upstream side of the inspection apparatus 104. [ However, the air knives 116a, ..., and the guide plates 118a, ... may be provided on the downstream side of the inspection apparatus. Fig. 8 is a top view of the glass plate manufacturing apparatus 100 according to the present modification. The glass plate manufacturing apparatus 100 shown in Fig. 8 further includes two air knives 116e and 116f and two guide plates 118e and 118f on the downstream side of the inspection apparatus. The air knife 116e and the guide plate 118e are disposed on the left side of the glass plate 10. The air knife 116f and the guide plate 118f are disposed on the right side of the glass plate 10.

It is important to reduce the vibration of the glass plate 10 on the upstream side of the inspection apparatus 104 in order to suppress deterioration in detection accuracy of the foreign substance present inside the glass plate 10 by the inspection apparatus 104. [ However, by reducing the vibration of the glass plate 10 not only on the upstream side of the inspection apparatus 104 but also on the downstream side of the inspection apparatus 104 as in the present modified example, the glass plate 10 on the upstream side of the inspection apparatus 104, The vibration of the motor 10 is further reduced. As a result, the present variation can more effectively suppress deterioration in the detection accuracy of the foreign substances present in the glass plate 10 by the inspection apparatus 104. [

(5-3) Variation C

The glass plate manufacturing apparatus 100 of the embodiment has four air knives 116a, 116b, 116c and 116d and four guide plates 118a, 118b, 118c and 118d. The left main surface 10a of the glass plate 10 faces the first left guide plate 118a and the second left guide plate 118c from the upstream side toward the downstream side. When a plurality of guide plates 118a are provided along the transport direction of the glass plate 10 as described above, the distance between the guide plates 118a, ... and the glass plate 10 is changed from the upstream side to the downstream side It may be made smaller gradually. That is, the guide plates 118a, ... may be gradually moved toward the glass plate 10 along the conveying direction of the glass plate 10. [

9 is a top view of the glass plate manufacturing apparatus 100 in the present modification. 9, only the glass plate 10, the first left air knife 116a, the second left air knife 116c, the first left guide plate 118a, and the second left guide plate 118c are shown. 9, the minimum value L20 of the distance between the second left guide surface 119c and the left main surface 10a of the second left guide plate 118c is smaller than the minimum value L20 of the distance 1 is smaller than the minimum value L10 of the distance between the left guide surface 119a and the left main surface 10a. 9, the minimum value of the distance between the second right guide surface 119d and the right main surface 10b of the second right guide plate 118d is the same as the minimum value of the distance between the second right guide plate 118b and the right main surface 10b. Is smaller than the minimum value of the distance between the first right guide surface 119b and the right main surface 10b.

The closer the guide plates 118a ... are to the glass plate 10 and the more the distance between the guide plates 118a ... and the glass plate 10 is, The velocity of the air flowing through the space is increased and the pressure of the air is lowered. The closer to the glass plate 10 the greater the force in the Y-axis direction acting on the glass plate 10 toward the guide plates 118a ..., The vibration in the axial direction is more effectively reduced. However, when the distance between the guide plates 118a, ... and the glass plate 10 on the upstream side is excessively small, the glass plate 10 is moved in the Y-axis direction by the guide plates 118a, ..., So that there is a risk of breakage. Therefore, as in the present modified example, it is preferable that the distance between the guide plates 118a, ... and the glass plate 10 gradually decreases from the upstream side toward the downstream side.

(5-4) Variation example D

In the glass sheet manufacturing apparatus 100 of the embodiment, air knives 116a, ..., and guide plates 118a, ... are arranged on both right and left sides of the glass sheet 10, respectively. However, the air knives 116a, ..., and guide plates 118a, ... may be disposed only on the left side of the glass plate 10 or on the right side of the glass plate 10. [

For example, when only the air knife 116a, ..., and the guide plates 118a, ..., opposed to the left main surface 10a of the glass plate 10 are arranged, the glass plate 10 is positioned on the left guide plate 118a , ...). Air flows between the left main surface 10a of the glass plate 10 and the guide plates 118a so that the glass plate 10 does not collide with the guide plates 118a, The distance between the plates 118a, ... is maintained stably. As a result, the glass plate 10 being conveyed is hardly subjected to a change in force in the Y-axis direction. Therefore, also in this modification, the vibration of the glass plate 10 is reduced.

(5-5) Variation E

The glass sheet manufacturing apparatus 100 of the embodiment detects the defects of the glass sheet 10 which is the platelet glass obtained in the plate taking-out step S2 in the first inspection step (S3). However, the glass plate manufacturing apparatus 100 may detect defects of the glass plate 10 cleaned in the cleaning step S7 in the second inspection step (S8). In this case, instead of detecting the foreign substances present inside the glass plate 10, the glass plate manufacturing apparatus 100 may be configured such that the glass plate 10 is formed by a spatula formed on the main surface of the glass plate 10, Cracks, foreign matter adhering to the main surface of the glass plate 10, and the like. The glass plate manufacturing apparatus 100 detects foreign substances existing in the glass plate 10 and detects foreign matter existing on the main surface of the glass plate 10 and flaws formed on the main surface of the glass plate 10, Cracks, and foreign matter adhering to the main surface of the glass plate 10 may be further detected.

(5-6) Variation Example F

The glass plate manufacturing apparatus 100 according to the embodiment is a glass plate manufacturing apparatus 100 that is formed by air discharged from air knives 116a, ... and guided by guide plates 118a, The vibration of the glass plate 10 in the Y-axis direction is sufficiently suppressed by the flow of the air along the main surfaces 10a and 10b of the glass plate 10 to suppress the deterioration of the detection accuracy of the foreign substances present in the glass plate 10 can do.

However, before the first inspection step (S3), the glass plate manufacturing apparatus 100 may further perform a cleaning step for removing foreign matters adhering to the main surfaces 10a and 10b of the glass plate 10. [ The cleaning process blows air toward the main surfaces 10a and 10b, for example, to blow off the foreign substances adhering to the main surfaces 10a and 10b from the main surfaces 10a and 10b. Specifically, in the cleaning step, high-pressure compressed air is blown toward the main surfaces 10a and 10b by using an air nozzle or the like to blow off foreign substances adhering to the main surfaces 10a and 10b. Thereafter, in the cleaning step, the compressed air ejected from the air nozzle is sucked together with foreign matter removed from the main surfaces 10a and 10b by using a vacuum nozzle or the like provided in the vicinity of the air nozzle. The foreign substance is a cullet which is a minute glass which is generated from the cut surface of the glass sheet in the plate taking-out step (S2), and a substance caused by the conveying roll used for conveying the glass sheet downward in the forming step (S1) to be.

In this modification, a cleaning process for removing foreign substances adhered to the main surfaces 10a and 10b of the glass plate 10 is performed before the first inspection step S3, It is possible to more effectively suppress the deterioration of the detection accuracy of the foreign substance present inside the sensor.

(5-7) Variation example G

The glass plate manufacturing apparatus 100 according to the embodiment has the main surfaces 10a and 10b of the glass plate 10 formed by the air discharged from the air knives 116a ... and guided by the guide plates 118a, The vibration of the glass plate 10 in the Y-axis direction can be sufficiently suppressed.

However, the glass plate manufacturing apparatus 100 may confirm in the inspection device 104 whether or not the vibration in the Y-axis direction of the glass plate 10 is sufficiently suppressed in the first inspection step (S3). In the first inspection step (S3), the camera 122a of the line sensor 122 of the inspection apparatus 104 picks up the glass plate 10 at the focusing position (in-focus position) in the Y-axis direction. The focusing position is in the focus area of the camera 122a at the position where the focus of the image on the camera 122a is the best. The focusing position can be set at any position in the Y-axis direction. However, in order to effectively detect defects scattered in the thickness direction (Y-axis direction) of the glass plate 10, the focusing position is set at the center of the glass plate 10 in the thickness direction .

In the case where the Y-axis direction vibration of the glass plate 10 conveyed by the conveying apparatus 102 is not sufficiently suppressed, the glass plate 10 sometimes deviates from the focus area of the camera 122a. Particularly, when the focus area of the camera 122a is as short as +/- 3 mm or less, the glass plate 10 tends to deviate from the focus area by vibrating in the Y-axis direction. If the glass plate 10 is displaced from the focus area of the camera 122a, there is a possibility that the detection accuracy of the foreign substance present inside the glass plate 10 is lowered.

The glass plate manufacturing apparatus 100 of the present modification detects the glass plate 10 out of the focus area of the camera 122a in the first inspection step S3, May be determined as a defective product and may be removed from the production line without being sent to the cutting step (S4). A distance sensor for measuring the distance in the Y axis direction from the camera 122a to the main surfaces 10a and 10b of the glass plate 10 is used to determine whether or not the glass plate 10 is out of the focus area . In this case, it is preferable that the distance sensor is provided in the vicinity of the camera 122a in order to bring the timing of imaging of the camera 122a and the timing of measurement of the distance sensor as close as possible.

10: Glass plate
10a: left main surface (first main surface)
10b: right main surface (second main surface)
100: Glass plate manufacturing apparatus
102: conveying device (conveying device)
104: inspection apparatus (inspection apparatus)
116a: first left air knife (first air blowing mechanism)
116b: first right air knife (second air blowing mechanism)
116c: second left air knife (first air blowing mechanism)
116d: second right air knife (second gas ejection mechanism)
118a: a first left guide plate (first guide member)
118b: first right guide plate (second guide member)
118c: a second left guide plate (first guide member)
118d: second right guide plate (second guide member)
119a: first left guide surface (first guide surface)
119b: first right guide surface (second guide surface)
119c: second left guide surface (first guide surface)
119d: second right guide surface (second guide surface)

Claims (11)

A transporting step of transporting the glass plate in a first direction,
And suppressing the movement of the glass plate in a second direction intersecting with the first direction when the glass plate is transported in the first direction,
Wherein the suppressing step comprises the step of causing the first gas to flow along the first main surface at a first gap between a first main surface of the glass plate and a first guide member disposed so as to face the first main surface, And a first gas supplying step of applying a force toward the first guide member to the glass plate. The method according to claim 1,
Wherein the suppressing step is a step of restricting the second gap between the second main surface which is the back surface side of the first main surface and the second guide member which is arranged to face the second main surface, And a second gas supplying step of applying a force directed toward the second guide member to the glass plate by flowing along the surface of the glass plate. 3. The method of claim 2,
In the first gas supplying step, the first base body is jetted toward the first guide member, and flows along the surface of the first guide member to be guided to the first gap,
Wherein the second base body is jetted toward the second guide member to flow along the surface of the second guide member to be guided to the second gap in the second base member supplying step. The method according to claim 2 or 3,
In the carrying step, the glass plate is transported in the first direction parallel to the end in a suspended state by gripping one end of the glass plate,
In the first gas supplying step, the first gas flows through the first gap gradually narrowing along the first direction,
Wherein in the second gas supplying step, the second base flows through the second gap gradually narrowing along the first direction. 5. The method according to any one of claims 1 to 4,
Further comprising an inspection step of inspecting the glass plate,
Wherein the suppressing step is performed at least before the inspection step. A transport mechanism for transporting the glass plate in the first direction,
And an inhibiting mechanism for suppressing the movement of the glass plate in a second direction intersecting with the first direction when the glass plate is transported in the first direction,
Wherein the suppression mechanism comprises:
A first guide member having a first guide surface opposed to a first main surface of the glass plate,
A second guide member having a second guide surface opposed to a second main surface which is a back side of the first main surface,
A first gas ejection mechanism for ejecting a first gas toward the first guide surface,
And a second gas ejection mechanism for ejecting the second gas toward the second guide surface,
Wherein the first gas ejection mechanism is a mechanism for ejecting the first gas along the first main surface at a first gap between the first main surface and the first guide surface so that a force toward the first guide member To the glass plate,
The second gas ejection mechanism is a mechanism for ejecting the second gas along the second main surface at a second gap between the second main surface and the second guide surface so that the force toward the second guide member And the glass plate is attached to the glass plate. The method according to claim 6,
Wherein the first guide member is formed by flowing the first base body along the first guide surface to guide the first base body to the first gap,
And the second guide member flows the second base body along the second guide surface to guide the second base body to the second gap. 8. The method according to claim 6 or 7,
The transport mechanism transports the glass plate in the first direction parallel to the end in a state in which the glass plate is suspended by holding one end of the glass plate,
Wherein the first guide member has the first guide surface gradually approaching the first main surface along the first direction,
And the second guide member has the second guide surface that gradually approaches the second main surface along the first direction. 9. The method according to any one of claims 6 to 8,
Further comprising an inspection mechanism for inspecting the guide plate,
Wherein the suppressing mechanism is provided at least on the upstream side of the inspection mechanism in the first direction. 10. The method of claim 9,
Wherein the restricting mechanism is further provided on the downstream side of the inspection mechanism in the first direction. 11. The method according to claim 9 or 10,
And a plurality of restraining mechanisms provided on the upstream side of the inspection mechanism in the first direction,
The minimum distance between the first major surface and the first guide surface and the minimum distance between the second major surface and the second guide surface are gradually increased along the first direction The glass plate manufacturing apparatus being reduced in size.
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