KR102317952B1 - Flat glass manufacturing method and flat glass manufacturing apparatus - Google Patents

Abstract

The plate glass manufacturing method is the time of the start of continuous manufacture of the plate glass GR. WHEREIN: The process of making a part of molten glass GM fall from the molded object 4 as a glass lump GR, The glass block GL is manufactured In order to be pinched by the one roller 10, the separation distance D1 of the 1st roller 10 in the width direction X of the molded object 4 in the width direction X of the molded object 4 The process of setting smaller than the separation distance D2 of the 2nd roller 11 is provided.

Description

Flat glass manufacturing method and flat glass manufacturing apparatus

The present invention relates to a method and apparatus for manufacturing flat glass from molten glass.

As is already known, as represented by glass substrates for flat panel displays (FPD) such as liquid crystal displays (LCD), plasma displays (PDP), and organic EL displays (OLED), there are surface defects in flat glass used in various fields. However, the current situation is that strict product quality is required for wave.

In order to satisfy such a request|requirement, the down-draw method is widely used as a manufacturing method of plate glass. As this downdraw method, an overflow downdraw method and a slot downdraw method are known.

In the overflow down-draw method, molten glass is poured into an overflow groove formed in the upper part of the molded body having a substantially wedge-shaped cross section, and the molten glass overflowing from this overflow groove on both sides is flowed along the sidewalls on both sides of the molded body, while the lower end of the molded body It is said that one sheet of glass is continuously molded by fusion integration. In addition, the slot-down draw method is said that a slot-shaped opening is formed in the bottom wall of the molded object to which molten glass is supplied, and a sheet glass is continuously shape|molded by flowing a molten glass through this opening part.

In particular, in the overflow down-draw method, since both sides of the molded plate glass are molded without contacting any part of the molded body during the molding process, the forged surface has excellent flatness and is free from defects such as scratches.

For example, as a plate glass manufacturing apparatus using the overflow down-draw method, as disclosed by patent document 1, the forming furnace which has a molded object inside, the slow cooling furnace provided below the forming furnace, and the lower side of the slow cooling furnace There are those provided with a cooling unit and a cutting unit installed in the. This plate glass manufacturing apparatus forms a plate glass (glass ribbon) by overflowing the molten glass from the top of the molded body and fusing it at the lower end thereof, passing this plate glass through an annealing furnace to remove its internal deformation, and in the cooling part After cooling to room temperature, it is configured to be cut to a predetermined dimension at the cutting part. In the slow cooling furnace, a plurality of upper and lower rollers for pulling the plate glass formed by the molded body are arranged.

Japanese Patent Laid-Open No. 2012-197185

The preparation step in the shaping|molding process by a shaping|molding furnace WHEREIN: The molten glass which overflowed from a shaping|molding object is comprised in the lower end of a shaping|molding object in a lump (henceforth a "glass lump"). Initiating a shaping|molding process WHEREIN: It is necessary to perform efficiently the preparatory work which clamps this glass lump and makes it pinched|interposed by the roller in an annealing furnace.

This invention was made in view of the said situation, and an object of this invention is to provide the plate glass manufacturing method and plate glass manufacturing apparatus which can perform the preparatory work of a shaping|molding process efficiently.

This invention is for solving the said subject, while flowing molten glass from a molded object and shaping|molding as plate glass, while arrange|positioning below the said molded object, and a set 1st roller which is spaced apart in the width direction of the said molded object, , A method of continuously manufacturing the plate glass by pulling the plate glass by a plurality of upper and lower rollers including a set of second rollers disposed below the first roller and spaced apart in the width direction of the molded article WHEREIN: at the time of the start of continuous manufacture of the said plate glass, in order to receive a part of the said molten glass as a glass block from the said molded object, and to clamp the said glass block with the said 1st roller, the said 1st roller The step of setting the separation distance in the width direction of the second roller to be smaller than the separation distance in the width direction of the second roller is provided.

At the start of manufacture of plate glass, that is, in the preparatory stage of a shaping|molding process, the glass lump which arises in the lower end part of a molded object is formed in the width direction center position of a molded object. In this method, this glass block can be reliably clamped by a 1st roller by setting the separation distance of the 1st roller in the width direction of a molded object smaller than the separation distance of a 2nd roller. The glass block is cooled by being pinched by the 1st roller, and while the width|variety spreads, it deform|transforms into plate shape. By clamping this plate-shaped deformed portion with a lower second roller, the width can be further expanded and plate glass having a desired width can be molded. By the positional relationship of such a 1st roller and a 2nd roller, it becomes possible to perform the preparatory work of a shaping|molding process efficiently.

In the plate glass manufacturing method, the first roller may have a shaft for supporting the first roller, and may be configured to be movable in the axial direction of the shaft. According to this, by configuring the first roller to be movable in the axial direction, the position of the first roller can be adjusted according to the position and size of the glass block. Therefore, the first roller can reliably pinch the glass gob at a suitable position.

In the said plate glass manufacturing method, after clamping the said glass block, it is preferable to move to the position near the edge part of the width direction in the said molded object so that it may become the same position as the said 2nd roller. According to this, a 1st roller can guide a glass gob to the 2nd roller side, and can pinch this glass gob with a 2nd roller at an early stage.

In addition, after the second roller pinches the end of the plate glass, it is preferable that the first roller falls so as not to contact the plate glass. In the state in which the plate glass of a predetermined width was continuously formed by the 2nd roller, this plate glass can be stably pulled by a 2nd roller, without changing the temperature of plate glass abruptly by removing a 1st roller from plate glass.

In the plate glass manufacturing method, the pressure at which the first roller clamps the glass block is preferably set to be greater than the pressure at which the second roller clamps the plate glass. According to this, it becomes possible to clamp a glass gob reliably by a 1st roller, and to expand the width|variety of the said glass gob suitably so that a part of this glass gob may face to a 2nd roller.

In the plate glass manufacturing method, it is preferable that the second roller has a shaft portion supporting the second roller, and the length of the shaft portion of the first roller is set longer than the length of the shaft portion of the second roller. . By configuring the axial portion of the first roller to be elongated in this way, the movement range of the first roller in the axial direction can be increased as much as possible. Accordingly, the first roller can reliably grip the glass block in response to the size and position of the glass block that changes depending on the size and temperature conditions of the plate glass.

In the plate glass manufacturing method, the width of the first roller is preferably set to be larger than the width of the second roller. According to this, a 1st roller can clamp a glass block reliably. In addition, the ability of the first roller to cool the glass gob is improved, so that the sandwiched glass gob can be effectively expanded in the direction of the second roller.

This invention is for solving the said subject, while receiving a part of molten glass as a glass lump, while arrange|positioning below the molded object which shape|molds the said molten glass as plate glass, and the said molded object, the upper and lower sides which pull the said plate glass A plate glass manufacturing apparatus having a plurality of stages of rollers, wherein the rollers are disposed below the molded body and spaced apart in the width direction of the molded body, a set of first rollers, and disposed below the first roller and a set of second rollers separated from each other in the width direction of the molded article, wherein the separation distance in the width direction of the first roller is determined in order to clamp the glass block by the first roller. It has a structure set smaller than the separation distance in the said width direction of the said 2nd roller, It is characterized by the above-mentioned.

In the preparatory stage of the molding process, a glass block formed at the lower end of the molded body is formed at a central position in the width direction of the molded body. In the said plate glass manufacturing apparatus, this glass block can be clamped reliably with a 1st roller by setting the separation distance of the 1st roller in the width direction of a molded object smaller than the separation distance of a 2nd roller. The glass block sandwiched by the first roller is cooled by the first roller, so that its width is gradually increased to be sandwiched by the second roller. Thereby, the plate glass can be continuously molded while maintaining a predetermined width. By the positional relationship of such a 1st roller and a 2nd roller, a plate glass manufacturing apparatus can perform the preparatory operation of a shaping|molding process efficiently.

(Effects of the Invention)

ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to perform the preparatory operation of a shaping|molding process efficiently.

1 : is a front view of a plate glass manufacturing apparatus.
It is a side view of a plate glass manufacturing apparatus.
3 : is sectional drawing of a roller and a shaft part.
It is a front view of the plate glass manufacturing apparatus which shows one process of a plate glass manufacturing method.
5 : is a front view of the plate glass manufacturing apparatus which shows one process of a plate glass manufacturing method.
6 : is a side view of the plate glass manufacturing apparatus which shows one process of a plate glass manufacturing method.
7 : is a front view of the plate glass manufacturing apparatus which shows one process of a plate glass manufacturing method.
It is a front view of the plate glass manufacturing apparatus which shows one process of a plate glass manufacturing method.
It is a side view of the plate glass manufacturing apparatus which shows one process of a plate glass manufacturing method.

EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing this invention is demonstrated, referring drawings. 1 to 9 show an embodiment of a plate glass manufacturing method and a plate glass manufacturing apparatus according to the present invention.

As shown in FIG.1 and FIG.2, the plate glass manufacturing apparatus 1 is mainly equipped with the shaping|molding furnace 2 and the slow cooling furnace 3 located below the shaping|molding furnace 2. As shown in FIG. The plate glass manufacturing apparatus 1 molds the molten glass GM supplied from the melting furnace installed on the upstream side into the plate glass GR by the shaping|molding furnace 2, Then, the internal deformation of this plate glass GR is carried out by the slow cooling furnace ( 3) is removed.

The molding furnace 2 includes a molded body 4 that performs an overflow downdraw method inside the furnace wall, and an edge roller 5 that extracts the molten glass GM overflowing from the molded body 4 as plate glass GR. be prepared

The molded body 4 has an elongated shape and an overflow groove 6 formed along the longitudinal direction at the top. Further, the molded body 4 has a vertical surface portion 7 and an inclined surface portion 8 constituting a pair of side wall portions opposed to each other. The lower end of the vertical surface portion 7 is formed such that the inclined surface portion 8 is connected. A pair of inclined surface portions 8 intersect by gradually approaching downward to constitute a lower end portion 9 of the molded body 4 .

As shown in FIG. 1, when the edge roller 5 sees from the front so that each edge part GRa, GRb of the width direction X in the plate glass GR may be pinched|interposed just below the molded object 4, right and left 1 constituted as a set. Moreover, as shown in FIG. 2, the edge roller 5 is a roller arranged in parallel in the plate thickness direction Y of the plate glass GR so that the edge roller 5 may pinch the edge parts GRa, GRb of the width direction X in the plate glass GR. constituted as a pair. In addition, below, the longitudinal direction of the molded object 4 is called "the width direction", and the common code|symbol X is used for the width direction of the molded object 4, and the width direction of the plate glass GR (FIG. 1, FIG. 4, 5, 7 and 8).

In this molding furnace 2, the molten glass GM is poured into the overflow groove 6 of the molded object 4, and the molten glass GM which overflowed from this overflow groove 6 to both sides is transferred to the vertical surface portion ( 7) and while flowing down along the inclined surface portion 8, the plate glass GR is continuously molded by fusion integration at the lower end portion 9 . In addition, the molded object 4 is not limited to the said structure, The structure which implements the slot down-draw method may be sufficient.

1 and 2, the slow cooling furnace 3 has rollers (annealer rollers) 10 to 13 configured as multiple stages (four stages in the drawing example) in the vertical direction. Hereinafter, the rollers 10-13 of these multiple stages are called 1st roller 10 thru|or 4th roller 13 in order from the top. As shown in FIG. 2, each roller 10-13 is comprised as a roller pair which clamps the plate glass GR in the plate|board thickness direction Y. As shown in FIG. Moreover, each roller 10-13 is comprised so that each edge part GRa, GRb of the width direction X in the plate glass GR may be clamped so that it may become one set of right and left when viewed from the front (refer FIG. 1).

Each of the rollers 10-13 is individually provided with the shaft parts 10a-13a which support the said rollers 10-13. Each roller 10-13 is a one-side support roller supported by one end of each shaft part 10a-13a. The length L1 of the shaft portion 10a of the first roller 10 is set longer than the lengths L2 to L4 of the shaft portions 11a-13a of the other rollers 11-13. Each of the shaft portions 11a to 13a of the second roller 11, the third roller 12, and the fourth roller 13 is configured such that the lengths L2 to L4 are equal.

As shown in FIG. 3, the cooling device 14 is provided in each axial part 10a-13a of each roller 10-13. The cooling device 14 is formed by arranging the cooling pipe 15 inside the shaft portions 10a to 13a formed in a hollow shape. The cooling pipe 15 has a mouth 15a for discharging a cooling medium such as air. The cooling medium discharged from the opening 15a cools the shaft portions 10a to 13a and the rollers 10 to 13 by circulating the shaft portions 10a to 13a.

Each roller 10-13 used as a pair in the plate|board thickness direction Y of the plate glass GR is comprised so that the distance between its axes can be changed. Moreover, each roller 10-13 is comprised so that a movement is possible along the axial direction, ie, the width direction X in the molded object 4 or plate glass GR. Hereinafter, the direction from the ends 4a and 4b of the molded body 4 toward the central portion 4c is referred to as "axially inward", and the direction from the central 4c to the ends 4a and 4b is referred to as "axially outward". ' is said.

The width W1 of the first roller 10 is configured to be larger than the widths W2 to W4 of the other rollers 11 to 13 . The width W2 of the second roller 11, the width W3 of the third roller 12, and the width W4 of the fourth roller 13 are configured to be equal.

The 1st roller 10 is mainly for the shaping|molding preparation process of the plate glass GR WHEREIN: It is for pinching the glass mass GL formed by the molten glass GM which overflowed from the molded object 4. As shown in FIG. When the glass mass GL held by the first roller 10 is deformed and formed into a plate shape, the second roller 11 to the fourth roller 13 interpose a part thereof and have a predetermined width. It is for clamping edge part GRa, GRb of the width direction X in plate glass GR.

Hereinafter, the method (plate glass manufacturing method) of shape|molding the plate glass GR with the plate glass manufacturing apparatus 1 of the said structure is demonstrated. At the time of the manufacturing start of the plate glass GR, it is necessary to perform the operation|work (preparation operation|work of a shaping|molding process) which clamps the molten glass GM which flows down from the molded object 4 to each roller 5 and 10-13. That is, while the molten glass GM supplied from the melting furnace is injected into the overflow groove 6 of the molded body 4, it overflows from the overflow groove 6 to form the vertical surface portion 7 and the inclined surface portion 8. and joins at the lower end (9). At this time, the edge roller 5 of one set of right and left pinches a part of molten glass GM which merges and is going to fall (fall) (refer FIG. 4). Moreover, in this invention, at the time of manufacture start of the plate glass GR, the case where the preparatory work of the shaping|molding process of the plate glass GR is needed is said, For example, the operation of the plate glass manufacturing apparatus 1 is temporarily interrupted. After becoming, the case where shaping|molding of the plate glass GR is restarted shall also be included.

As shown in FIG. 4, molten glass GM forms glass block GL in the center part 4c of the width direction X in the molded object 4. As shown in FIG. This glass block GL periodically falls (falls down) from the molded object 4 over a plurality of times. The 1st roller 10 is waiting in the position of the edge part 4a, 4b vicinity of the width direction X in the molded object 4 . In this standby position, the 1st roller 10 exists in the same position as the other rollers 11-13 in the width direction X. Accordingly, the separation distance D1 of the first roller 10 is the same as the separation distance D2-D4 of the other rollers 11-13.

When the glass mass GL is formed, as shown in FIG. 5 , the first roller 10 is positioned in the vicinity of the central portion 4c in the width direction X in the molded body 4 from the standby position (initial clamping position). It moves toward and clamps this glass block GL (the pinching process of the glass block GL by the 1st roller 10). In this case, as shown in Fig. 6, the first rollers 10 as a pair of rollers approach each other (indicated by a dashed-dotted line), thereby pinching the glass block GL in the middle of falling (falling).

Here, since the width of the glass block GL is smaller than the width of the plate glass GR to be formed later, the first roller 10 is positioned near the central portion 4c of the molded body 4, that is, the plate glass to be formed later. It is arrange|positioned at the position of center part GRc vicinity in the width direction X in (GR). In other words, when viewed from the front, the separation distance D1 in the axial direction (width direction X) in the first roller 10 that is one set of left and right is set to the left and right sets of the other rollers 11 to 13. It becomes smaller than the separation distances D2 to D4 in the axial direction (refer to Fig. 5).

The size of the glass block GL is changed according to the size or temperature condition of the plate glass GR to be formed. For this reason, the separation distance D1 of the 1st roller 10 is adjusted by movement to an axial direction. In the plate thickness direction Y of the plate glass GR, as for the 1st roller 10 used as a pair, the pressure which clamps the glass mass GL becomes larger than the pressure in which the other rollers 11-13 clamp the plate glass GR. is set to

The first roller 10 cools the glass block GL by pinching it, and expands the width of the glass block GL. As shown in FIG. 7 , the first roller 10 moves outward in the axial direction from a position in the vicinity of the central portion 4c of the molded body 4 so as to correspond to the expansion of the glass mass GL. Accordingly, the width of the glass block GL is further expanded. Thereby, the glass block GL approaches the 2nd roller 11. As shown in FIG.

The second roller 11, which is a set of left and right, moves inward in the axial direction to pinch a part of the glass mass GL. Thereby, each 2nd roller 11 comes close to each other, and the separation distance D2 becomes small. At this time, the separation distance D2 of the second roller 11 is set to be approximately equal to or slightly larger than the separation distance D1 of the first roller 10 . Then, the second roller 11 pinches a part of the glass mass GL expanded by the first roller 10 . When the 2nd roller 11 pinches a part of glass block GL, it will return to an original position (separation distance D2 becomes large again). By this operation of the first roller 10 and the second roller 11, the glass mass GL is widened and gradually deformed into a plate shape. Thereby, the upstream (upper side) molten glass GM following this glass block GL is also shape|molded in plate shape, expanding the width|variety.

The glass block GL, further expanded in width by the second roller 11 , reaches the third roller 12 . Thereby, the 3rd roller 12 pinches a part of glass block GL, and guides it downward. After that, the fourth roller 13 pinches a part of the glass mass GL and guides it downward (refer to FIG. 8). In this way, by being pinched by the 2nd roller 11 - the 4th roller 13, the plate-shaped molten glass GM following the glass mass GL further expands the width, As a result, the plate glass ( GR) is towed by the second roller 11 to the fourth roller 13 (see FIG. 1 ).

The 2nd roller 11 - the 4th roller 13 are edge part GRa of the width direction X in the said plate glass GR, when molten glass GM is shape|molded by the plate glass GR of predetermined width. , GRb), in the width direction X (axial direction), it is spaced apart by a certain distance D2 to D4 (refer to Fig. 1). In this case, although each separation distance D2-D4 is set so that it may become the same, it is not limited to this, It can set so that it may differ according to the state of the plate glass GR.

When the plate glass GR is clamped by the 2nd roller 11 - the 4th roller 13, the 1st roller 10 cancel|releases the clamping of the plate glass GR. That is, as shown in FIG. 9, the 1st roller 10 of a pair becomes large in the interaxial distance, and falls from the plate glass GR. Thereby, since the 1st roller 10 stops contacting the plate glass GR, the plate glass GR is not cooled by the 1st roller 10. Then, you may move this 1st roller 10 outward in an axial direction, and may make it space|separate further from the plate glass GR. In this case, the separation distance D1 of the 1st roller 10 of one set of right and left may become larger than the separation distance D2-D4 of the other rollers 11-13.

According to the plate glass manufacturing apparatus 1 and the plate glass manufacturing method which concern on this embodiment demonstrated above, at the time of the manufacturing start of the plate glass GR (at the time of the preparatory work of a shaping|molding process), the 1st roller 10 is the molded object 4 By arrange|positioning at the position (position of the central part GRc vicinity of the width direction in the plate glass GR) of the central part 4c vicinity in the width direction X in the said molded object 4 below, 1st The separation distance D1 of the roller 10 is set smaller than the separation distance D2 of the second roller 11 . Thereby, the glass lump GL which arises in the preparatory stage of a shaping|molding process can be clamped reliably.

The glass block GL is cooled by being pinched by the 1st roller 10, and while the width|variety spreads, it deform|transforms into plate shape. By pinching the part deformed in this plate shape by the 2nd roller 11 below, the width|variety of the molten glass GM can be expanded further, and plate glass GR which has a desired width can be shape|molded. Thereby, the plate glass manufacturing apparatus 1 and the plate glass manufacturing method become possible to perform the preparatory work of a shaping|molding process efficiently.

In addition, by configuring the first roller 10 to be movable in the axial direction, the position of the first roller 10 can be adjusted according to the generation position and size of the glass lump GL. Accordingly, the first roller 10 can reliably pinch the glass mass GL at a suitable position. Further, the first roller 10 moves outward in the axial direction so as to be in the same position as the second roller 11 after clamping the glass block GL. When the 1st roller 10 moves to the position near the edge part 4a, 4b of the width direction X in the molded object 4, the glass block GL is guided to the 2nd roller 11 side, and this The glass block GL can be clamped by the second roller 11 at an early stage.

Moreover, after the 2nd roller 11 pinches|interposes edge part GRa, GRb of the plate glass GR, by falling so that the 1st roller 10 may not contact the plate glass GR, cooling of the 1st roller 10 Since the effect does not reach the plate glass GR, the plate glass GR of a uniform thickness can be suitably pulled by the second roller 11 to the fourth roller 13 . In addition, since the pressure at which the first roller 10 clamps the glass block GL is set larger than the pressure at which the second roller 11 clamps the plate glass GR, the glass block having a larger thickness than the plate glass GR GL can be reliably clamped by the first roller 10 . Moreover, by the 1st roller 10, it becomes possible to expand the width|variety of the glass gob GL suitably so that a part of the glass gob GL may face the 2nd roller 11. As shown in FIG.

In addition, by setting the length L1 of the shaft portion 10a of the first roller 10 to be longer than the length L2 to L4 of each shaft portion 11a to 13a of the second roller 11 to the fourth roller 13, , it is possible to increase the movement range of the first roller 10 in the axial direction as much as possible. In addition, by shortening the length of the shaft portions 11a to 13a of the second roller 11 to the fourth roller 13, the shaking of the core of the second roller 11 to the fourth roller 13 is minimized to reduce the plate glass GR. It becomes possible to properly tow the

By setting the width W1 of the first roller 10 to be larger than the widths W2 to W4 of the other rollers 11 to 13, the glass block GL is reliably held by the first roller 10, and further, It can improve the ability to cool the glass gob.

In addition, this invention is not limited to the structure of the said embodiment, nor is it limited to the above-mentioned effect. Various changes are possible for this invention in the range which does not deviate from the summary of this invention.

Although the example in which the 1st roller 10 is moved axially outward after clamping the glass block GL was shown in the said embodiment, it is not limited to this. The 1st roller 10 may remain fixed to the position in the state which pinched|interposed the glass block GL.

Although the example in which the 1st roller 10 and the 2nd roller 11 are moved axially in the said embodiment and the glass block GL is clamped by these was shown, it is not limited to this, The 3rd roller 12 and the fourth roller 13 may be moved in the axial direction to sandwich the glass block GL therebetween.

1: Plate glass manufacturing equipment
4: molded body
10: first roller
10a: shaft portion of the first roller
11: 2nd roller
11a: shaft portion of the second roller
GL: glass gob
GM: Molten Glass
GR: flat glass
L1: the length of the shaft portion of the first roller
L2: the length of the shaft of the second roller
W1: the width of the first roller
W2: the width of the second roller

Claims (8)

A set of 1st rollers which flow down a molten glass from a molded object and shape it as plate glass, are arrange|positioned below the said molded object, and are spaced apart in the width direction of the said molded object, and are arrange|positioned below the said 1st roller In the method for continuously manufacturing the plate glass by pulling the plate glass by a plurality of upper and lower rollers including a set of second rollers spaced apart in the width direction of the molded object,
At the start of the continuous production of the plate glass,
A step of receiving a part of the molten glass from the molded body as a glass lump;
a step of setting the separation distance in the width direction of the first roller to be smaller than the separation distance in the width direction of the second roller in order to clamp the glass block by the first roller;
and the step of deforming the glass block into a plate shape by sandwiching the glass block by the first roller and the second roller. The method of claim 1,
The first roller has a shaft for supporting the first roller, and the plate glass manufacturing method is configured to be movable in the axial direction of the shaft. 3. The method of claim 2,
After the said 1st roller clamps the said glass block, the plate glass manufacturing method which moves to the position near the edge part of the width direction in the said molded object so that it may become the same position as the said 2nd roller. 3. The method according to claim 1 or 2,
After the second roller pinches the end of the plate glass in the width direction, the first roller falls so as not to contact the plate glass. 4. The method according to any one of claims 1 to 3,
The plate glass manufacturing method in which the pressure with which the said 1st roller clamps the said glass mass is set larger than the pressure with which the said 2nd roller clamps the said plate glass. 4. The method according to claim 2 or 3,
The second roller has a shaft for supporting the second roller,
The length of the said axial part of a said 1st roller is set longer than the length of the said axial part of a said 2nd roller, The plate glass manufacturing method. 4. The method according to any one of claims 1 to 3,
The width of the first roller is set larger than the width of the second roller. In an apparatus for manufacturing a plate glass comprising a molded body that receives a part of the molten glass as a lump of glass and shapes the molten glass as a plate glass, and a plurality of upper and lower rollers disposed below the molded body and pulling the plate glass ,
The roller is a set of first rollers disposed below the molded body and spaced apart in the width direction of the molded body, and disposed below the first roller and spaced apart in the width direction of the molded body a set of second rollers;
It has a structure for setting the separation distance in the width direction of the first roller to be smaller than the separation distance in the width direction of the second roller,
The said 1st roller and the said 2nd roller are comprised so that it can deform|transform into a plate shape by pinching|interposing the said glass block, The plate glass manufacturing apparatus characterized by the above-mentioned.

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