WO2023090160A1

WO2023090160A1 - Glass plate cleaning device and glass plate manufacturing method

Info

Publication number: WO2023090160A1
Application number: PCT/JP2022/041077
Authority: WO
Inventors: 薫鑑継
Original assignee: 日本電気硝子株式会社
Priority date: 2021-11-16
Filing date: 2022-11-02
Publication date: 2023-05-25
Also published as: TW202327745A; JP2023073736A

Abstract

Provided is a glass plate cleaning device 1 comprising: a rotary cleaning body W which has a cleaning member 9 that contacts the upper surface Ga of a glass plate G, and a rotary shaft 8 that is coupled to the cleaning member 9 and rotates together with the cleaning member 9; and a support base 5 for supporting the rotary shaft 8. The support base 5 comprises a sliding support structure S for supporting the rotary shaft 8 so as to allow movement thereof in the axial direction.

Description

Glass plate cleaning device and glass plate manufacturing method

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

Displays such as liquid crystal displays and organic EL displays are being promoted for higher definition. Along with this, a precise electric circuit is formed on the main surface of a glass plate used as a display substrate in the manufacturing process of the display. Therefore, this type of glass plate is required to have a high degree of cleanness, free from dust and dirt.

Therefore, in the glass plate manufacturing process, a cleaning step for cleaning the main surfaces of the glass plates is generally provided after the cutting step to obtain a plurality of glass plates by cutting the original glass plate into a predetermined size. is.

As a method for cleaning the main surface of the glass plate, for example, the method disclosed in Patent Document 1 can be mentioned. In this document, each cleaning member is rotated while a plurality of cleaning members are in contact with the main surface of the glass plate. This cleans the main surface of the glass plate while rubbing it. The cleaning member is attached to the tip of the rotating shaft (spindle). By rotationally driving this rotating shaft, the cleaning member rotates together with the rotating shaft.

JP 2020-7193 A

Patent Document 1 discloses providing a spacer between the cleaning member and the rotating shaft in order to adjust the height position of the cleaning member with respect to the glass plate. By adjusting the thickness of this spacer, the height position of the cleaning member with respect to the glass plate is adjusted.

However, even if spacers are provided, it may not be possible to accurately adjust the height position of the cleaning member with respect to the glass plate due to variations in the thickness of the spacers. As a result, the contact state between the cleaning member and the glass plate becomes insufficient, and there is a risk that uneven cleaning may occur on the main surface of the glass plate.

An object of the present invention is to reliably reduce uneven cleaning of the main surface of a glass plate.

(1) A glass plate cleaning apparatus according to the present invention, which has been invented to solve the above problems, includes a cleaning member that contacts the main surface of the glass plate and a rotating shaft that is connected to the cleaning member and rotates together with the cleaning member. and a support base for supporting the rotating shaft, and the support base includes a slide supporting structure for axially movably supporting the rotating shaft.

With this configuration, the height position of the cleaning member relative to the main surface of the glass plate can be accurately adjusted by moving (sliding) the rotating shaft in the axial direction with the slide support structure. As a result, the contact state between the cleaning member and the main surface of the glass plate is stabilized, and uneven cleaning of the main surface of the glass plate can be reliably reduced.

(2) In the configuration of (1) above, it is preferable that a plurality of rotary cleaning bodies are provided, and one support stand is provided with a plurality of slide support structures that support a plurality of rotating shafts movably in their respective axial directions.

In this way, while supporting a plurality of rotating shafts with one support, the height position of each cleaning member connected to each rotating shaft can be individually adjusted by each slide support structure.

(3) In the configuration of (1) or (2) above, it is preferable that the slide support structure is configured so that the rotating shaft moves toward the main surface by the weight of the rotating cleaning body.

By doing so, the rotating shaft always tries to approach the main surface of the glass plate, so that the contact state between the cleaning member and the main surface of the glass plate becomes more stable.

(4) In the configuration of (3) above, it is preferable that the rotating cleaning body has a detachable weight.

By doing so, the force of the rotating shaft toward the main surface of the glass plate can be adjusted by the weight of the weight. Therefore, the contact state between the cleaning member and the main surface of the glass plate becomes more stable.

(5) In any one of the configurations (1) to (4) above, the slide support structure preferably includes a sliding bearing that supports the rotating shaft rotatably and axially movably.

By doing so, it is possible to stabilize the rotation of the rotating shaft while allowing the axial movement of the rotating shaft.

(6) A method for manufacturing a glass plate according to the present invention, which was invented to solve the above problems, uses a glass plate cleaning apparatus having any one of the above configurations (1) to (5) to clean a glass plate. characterized by comprising a cleaning step of cleaning the main surface of the

By doing so, it is possible to enjoy the same effect as the corresponding configuration already described.

According to the present invention, since the contact state between the cleaning member and the main surface of the glass plate is stabilized, uneven cleaning of the main surface of the glass plate can be reliably reduced.

BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing which shows the washing|cleaning apparatus of the glass plate which concerns on 1st embodiment. FIG. 2 is a plan view showing the apparatus for cleaning the glass plate of FIG. 1; 1. It is sectional drawing which expands and shows one washing|cleaning unit periphery contained in the washing|cleaning apparatus of the glass plate of FIG. FIG. 3 is a side view for explaining a cleaning process using the glass plate cleaning apparatus of FIG. 1 ; FIG. 3 is a side view for explaining a cleaning process using the glass plate cleaning apparatus of FIG. 1 ; FIG. 3 is a side view for explaining a cleaning process using the glass plate cleaning apparatus of FIG. 1 ; FIG. 3 is a side view for explaining a cleaning process using the glass plate cleaning apparatus of FIG. 1 ; It is sectional drawing which expands and shows the periphery of one washing|cleaning unit contained in the washing|cleaning apparatus of the glass plate which concerns on 2nd embodiment.

A glass plate cleaning apparatus and a glass plate manufacturing method according to the present embodiment will be described below with reference to the drawings. It should be noted that XYZ in the figure is an orthogonal coordinate system. The X and Y directions are horizontal and the Z direction is vertical. Duplicate description may be omitted by attaching the same reference numerals to corresponding components in each embodiment. When only a part of the configuration is described in each embodiment, the configurations of other embodiments previously described can be applied to other portions of the configuration. In addition to combinations of configurations explicitly specified in the description of each embodiment, configurations of a plurality of embodiments can be partially combined even if they are not specified unless there is a particular problem with the combination.

(First embodiment)
As shown in FIGS. 1 and 2, the glass plate cleaning apparatus 1 according to the first embodiment conveys a glass plate G in a horizontal posture by a conveying mechanism (not shown) such as a roller conveyor or a belt conveyor, while cleaning the glass plate. An upper surface Ga and a lower surface Gb, which are a pair of main surfaces of the plate G facing each other in the plate thickness direction, are cleaned at the same time.

Here, in this embodiment, the upper surface Ga of the glass plate G is a guaranteed surface, and the lower surface Gb of the glass plate G is a non-guaranteed surface. An electric circuit or the like is formed on the security surface in the display manufacturing process or the like. Therefore, the cleanliness of the upper surface Ga of the glass plate G, which is the guaranteed surface, is particularly important.

The size of one side of the glass plate G is preferably 500 mm to 4000 mm, the plate thickness is preferably 0.05 mm to 10 mm, and more preferably 0.2 mm to 0.7 mm.

The cleaning apparatus 1 includes an upper surface cleaning mechanism 2 for cleaning the upper surface Ga of the glass plate G and a lower surface cleaning mechanism 3 for cleaning the lower surface Gb of the glass plate G.

Here, the lower surface cleaning mechanism 3 has a configuration in which the upper surface cleaning mechanism 2 is turned upside down, and has substantially the same configuration as the upper surface cleaning mechanism 2 . Therefore, the configuration of the upper surface cleaning mechanism 2 will be described below as an example, and a detailed description of the configuration of the lower surface cleaning mechanism 3 will be omitted.

As shown in FIG. 1, the upper surface cleaning mechanism 2 includes a support base 5 having a housing structure in which the cleaning liquid 4 is stored in the internal space, and a plurality of cleaning units 6 for cleaning the upper surface Ga of the glass plate G.

As the cleaning liquid 4, liquids such as cleaning liquid (eg, liquid detergent) and rinsing liquid (eg, water) can be used.

The support table 5 is arranged so as to straddle the width direction (X direction) of the glass plate G perpendicular to the conveying direction (Y direction) of the glass plate G. Both ends of the support base 5 in the width direction are supported by lifting devices 5a that support the support base 5 so as to be able to move up and down. In this embodiment, when cleaning the glass plate G, the support base 5 is fixed at a predetermined reference position. On the other hand, when the thickness of the glass plate G is greatly changed due to a change in the type of the glass plate G, etc., the height position of the support base 5 is adjusted by the lifting device 5a before cleaning the glass plate G, and the glass plate G is cleaned. A reference position is set in advance according to the thickness of the .

A plurality of cleaning units 6 are arranged in a row along the width direction (X direction) of the glass plate G perpendicular to the glass plate G conveying direction (Y direction). Each cleaning unit 6 has a shaft case 7 fixed to the support base 5 so as to face the inner space of the support base 5, and is rotatably held in the shaft case 7 so as to face the inner space of the shaft case 7. A rotating shaft 8 and a cleaning member 9 attached to the tip of the rotating shaft 8 outside the support base 5 and the shaft case 7 are provided. In each washing unit 6, the rotating shaft 8 and the washing member 9 constitute a rotating washing body W, which rotate together integrally. Here, the "front end" means the end on the glass plate G side, and the "base end" means the end on the side opposite to the front end on the glass plate G side (the same applies hereinafter).

The shaft case 7 is a cylindrical member, and is fixed in a state of being inserted through holes respectively provided on the upper and lower surfaces of the support base 5 .

Slide bearings

10 and 11 are press-fitted and fixed to the tip and base ends of the shaft case 7, respectively. The slide bearing 10 on the tip side has a cylindrical portion 10a and a collar portion 10b provided at the tip portion of the cylindrical portion 10a. The sliding bearing 11 on the proximal end side has a cylindrical portion 11a and a collar portion 11b provided at the proximal end portion of the cylindrical portion 11a. The sliding

bearings

10 and 11 may be made of metal, for example, but are made of resin (eg, engineering plastic) in this embodiment.

The rotary shaft 8 is rotatably held by

cylindrical portions

10a and 11a of

slide bearings

10 and 11 while allowing movement in the axial direction (Z direction). That is, the

slide bearings

10 and 11 and the shaft case 7 constitute a slide support structure S that supports the rotary shaft 8 so as to be axially movable. In this embodiment, one support table 5 includes a plurality of slide support structures S, and a plurality of rotating shafts 8 are supported so as to be axially movable. In other words, a plurality of rotary cleaning bodies W are movable in the axial direction.

The cleaning member 9 is detachable with respect to the rotary shaft 8. The cleaning member 9 includes a cleaning portion 9a that comes into contact with the upper surface Ga of the glass plate G to clean the upper surface Ga of the glass plate G, and a support portion 9b that supports the cleaning portion 9a.

The type of the cleaning part 9a may be, for example, a brush, but in this embodiment it is a sponge. Although the shape of the cleaning portion 9a is not particularly limited, it is disc-shaped in this embodiment.

The shaft case 7 is provided with a first supply path R1 that communicates the inner space of the support base 5 with the inner space of the shaft case 7, and the cleaning liquid 4 in the inner space of the support base 5 flows as indicated by an arrow a. The internal space of the shaft case 7 is supplied through the first supply path R1.

The rotary shaft 8 is provided with a second supply path R2 that communicates the inner space of the shaft case 7 with the cleaning member 9, and the cleaning liquid 4 in the inner space of the shaft case 7 is supplied to the second supply path R2 as indicated by an arrow b. It is supplied to the cleaning member 9 through the path R2.

The cleaning member 9 is provided with a through hole R3 communicating with the second supply path R2, and the cleaning liquid 4 supplied through the second supply path R2 is supplied to the glass plate G through the through hole R3 as indicated by an arrow c. It has become so. The through hole R3 may be omitted when the cleaning member 9 is made of a material (for example, a porous material or the like) through which the cleaning liquid 4 can pass.

The upper surface cleaning mechanism 2 includes a rotation drive mechanism 12 that rotates the rotating shaft 8 of each cleaning unit 6 . The rotary drive mechanism 12 applies a rotary drive force to the proximal end portion of the rotary shaft 8 outside the support base 5 and the shaft case 7 .

The rotation drive mechanism 12 includes a gear mechanism 13 and a drive section 14. The gear mechanism 13 has a plurality of gears 13a attached to the base end of each rotating shaft 8, and the adjacent gears 13a are meshed with each other. The drive unit 14 includes a motor 14 a and a gear 14 b attached to the motor 14 a , and the gear 14 b meshes with the gear 13 a of the gear mechanism 13 . Therefore, when the gear 14b is rotated by the rotation of the motor 14a, the power is transmitted to the gear mechanism 13, and the rotary shaft 8 of each cleaning unit 6 rotates.

In this embodiment, the rotating shafts 8 adjacent in the width direction are designed to rotate in opposite directions (see FIG. 2), but they may rotate in the same direction. The power transmission unit is not limited to the gear mechanism 13, and may be other means such as a belt. A drive unit (motor) may be attached to each rotating shaft 8 individually.

Further, like the upper surface cleaning mechanism 2, the lower surface cleaning mechanism 3 has a cleaning unit 15, a cleaning member 16, a cleaning section 16a, a support section 16b, and the like. The cleaning apparatus 1 cleans the upper and lower surfaces Ga and Gb of the glass plate G while sandwiching them between a pair of cleaning

members

9 and 16 . However, in this embodiment, the cleaning member 9 of the upper surface cleaning mechanism 2 moves vertically so as to follow the upper surface Ga of the glass plate G, but the cleaning member 16 of the lower surface cleaning mechanism 3 moves along the lower surface of the glass plate G. It does not move vertically to follow Gb. In other words, the cleaning member 16 of the undersurface cleaning mechanism 3 maintains a constant height position during cleaning.

As shown in FIG. 2, the upper surface cleaning mechanism 2 has a plurality of cleaning rows L1 and L2 in which a plurality of cleaning units 6 are arranged in rows in the X direction, spaced apart in the transport direction (Y direction). The example has two rows). The cleaning members 9 included in the cleaning line L1 on the upstream side and the cleaning members 9 included in the cleaning line L2 on the downstream side are arranged so as not to completely overlap when viewed from the transport direction. As a result, when viewed from the conveying direction, the cleaning members 9 of the cleaning row L2 on the downstream side are arranged so as to overlap the gaps between the cleaning members 9 adjacent in the width direction in the cleaning row L1 on the upstream side. ing.　

Separate support bases 5 may be used for each of the washing lines L1 and L2. Alternatively, a common (one) support table 5 may be used for the plurality of cleaning lines L1 and L2.

As shown in FIG. 3, in the upper surface cleaning mechanism 2, the slide support structure S is arranged so that the rotating shaft 8 moves toward the upper surface Ga of the glass plate G by the weight of the rotating cleaning body W (the rotating shaft 8 and the cleaning member 9). is configured to That is, the amount D1 of downward projection of the tip of the rotating shaft 8 from the support base 5 without the glass plate G is the amount D2 of downward protrusion of the tip of the rotating shaft 8 from the support base 5 with the glass plate G. bigger than In other words, the upward protrusion amount U1 of the base end portion of the rotating shaft 8 without the glass plate G from the support base 5 is the same as the amount U1 of the base end portion of the rotating shaft 8 with the glass plate G present from the support base 5 It is smaller than the upward protrusion amount U2.

In the present embodiment, when the glass plate G is not present, the cleaning member 9 of the upper surface cleaning mechanism 2 moves onto the cleaning member 16 of the lower surface cleaning mechanism 3 as the rotating shaft 8 descends due to the weight of the rotating cleaning body W. It is designed to be placed. When the gear mechanism 13 transmits the rotational driving force, in order to maintain the engagement between the gears 13a, the maximum amount of movement of the rotating shaft 8 (the amount of downward projection D1−the amount of downward projection D2) is the thickness of the gear 13a ( face width). The maximum amount of movement of the rotating shaft 8 can be controlled, for example, by the size of the gap in the vertical direction (Z direction) between the lower surface of the gear 13a and the upper surface of the shaft case 7 (slide bearing 11). The maximum amount of movement of the rotating shaft 8 is set to 0.1 to 10 mm, for example.

In this embodiment, inclined guide surfaces 9aa, 16aa for guiding the glass plate G between the cleaning

members

9, 16 are provided at the peripheral edges of the

cleaning portions

9a, 16a of the

cleaning members

9, 16. . This allows the glass plate G to easily enter between the two

cleaning members

9 and 16 in the cleaning process.

Next, a method for manufacturing a glass plate according to this embodiment will be described.

This manufacturing method includes, for example, a molding process, a slow cooling process, a board picking process, a cutting process, a cleaning process, an inspection process, and a packing process.

In the forming process, a glass ribbon is formed from molten glass by a known method such as an overflow downdraw method or a float method.

In the slow cooling process, the molded glass ribbon is slowly cooled in order to reduce the warp and internal strain of the molded glass ribbon.

In the plate-cutting process, the slowly cooled glass ribbon is cut into predetermined lengths to obtain multiple original glass plates.

In the cutting step, the original glass plate is cut into a predetermined size to obtain one or more glass plates G. As a method for cutting the original glass plate, for example, bending stress cutting, laser cutting, laser fusion cutting, or the like can be used. The glass plate G is preferably rectangular.

In the cleaning process, the cleaning apparatus 1 is used to clean the glass plate G while conveying it in a horizontal posture.

In the inspection process, the cleaned glass plate G is inspected for scratches, dust, dirt, etc. on the surface and/or internal defects such as air bubbles and foreign matter. The inspection is performed using an optical inspection device such as a camera.

In the packing process, as a result of the inspection, the glass plates G that satisfy the desired quality are packed. Packing is performed by stacking a plurality of glass sheets G horizontally or vertically on a predetermined pallet. In this case, it is preferable to interpose a protective sheet made of interleaving paper, foamed resin, or the like between the glass plates G in the stacking direction.

It should be noted that this manufacturing method may further include a heat treatment process after the board picking process and an end surface processing process after the cutting process.

Next, the operation of the cleaning device 1 in the cleaning process described above will be described.

In the cleaning step, first, as shown in FIG. 4, the glass plate G is transported along the transport direction (Y direction) from the upstream side of the cleaning device 1. At this time, the cleaning members 9 of the upper surface cleaning mechanism 2 stand by while being placed on the cleaning members 16 of the lower surface cleaning mechanism 3 as the rotating shaft 8 descends due to the weight of the rotary cleaning body W itself. That is, both cleaning

members

9 and 16 are in contact with each other in the standby state.

After that, when the glass plate G reaches both cleaning

members

9 and 16, as shown in FIGS. Plank G enters.

Specifically, the cleaning member 9 of the upper surface cleaning mechanism 2 is movable along with the rotating shaft 8 in the axial direction (vertical direction) of the rotating shaft 8 by the slide support structure S. Therefore, when the glass plate G reaches both cleaning

members

9 and 16, the cleaning member 9 of the upper surface cleaning mechanism 2 is pushed upward by the glass plate G coming into contact with the inclined guide surface 9aa (see FIG. 5). As a result, the cleaning member 9 of the upper surface cleaning mechanism 2 rides on the upper surface Ga of the glass plate G while moving upward together with the rotating shaft 8 . After riding on the upper surface Ga, the cleaning member 9 of the upper surface cleaning mechanism 2 continues to press the upper surface Ga of the glass plate G downward as the rotating shaft 8 descends due to the weight of the cleaning rotary unit W (see FIG. 6).

Further, when the glass plate G is withdrawn from between the cleaning

members

9 and 16, the cleaning member 9 of the upper surface cleaning mechanism 2 moves downward due to the weight of the cleaning rotating portion W, as shown in FIG. and placed on the cleaning member 16 of the lower surface cleaning mechanism 3 again.

As described above, the rotating shaft 8 (cleaning rotating part W) of the upper surface cleaning mechanism 2 can be vertically moved by the slide support structure S. Therefore, the height position of the cleaning member 9 of the upper surface cleaning mechanism 2 is automatically adjusted so as to follow the upper surface Ga of the glass plate G. As shown in FIG. Such an operation similarly occurs in each cleaning member 9 included in the upper surface cleaning mechanism 2 . Therefore, the contact state between each cleaning member 9 and the upper surface Ga of the glass plate G is stabilized, and uneven cleaning of the upper surface Ga of the glass plate G can be reliably reduced.

(Second embodiment)
As shown in FIG. 8, the glass plate cleaning apparatus 1 and the glass plate cleaning method according to the second embodiment differ from the first embodiment in that a The point is that the weight 21 is provided.

Specifically, the weight 21 is detachably fixed to the support portion 9b by a fastening member such as a bolt while being placed on the support portion 9b of the cleaning member 9 .

The shape of the weight 21 is not particularly limited, but in this embodiment, it has an annular shape along the periphery of the disk-shaped cleaning portion 9a in plan view. Further, the weight 21 is divided into a plurality of parts in the circumferential direction (for example, a half-split shape) in consideration of mountability.

By providing the weight 21 in this manner, the self-weight of the rotating cleaning body W acting on the rotating shaft 8 can be adjusted. That is, the force of the rotation shaft 8 directed toward the upper surface Ga of the glass plate G can be adjusted. Therefore, there is an advantage that the contact state between the cleaning member 9 and the upper surface Ga of the glass plate G is very stable.

It should be noted that the weight 21 preferably has a laminated structure in which a plurality of plate-like bodies are stacked. In this way, the weight of the weight 21 can be easily adjusted according to the number of laminated plate-like bodies.

The weight 21 may be detachably attached to the rotating shaft 8 . The mounting position of the weight 21 is not particularly limited as long as it is within the range of the rotating cleaning body W.

The present invention is not limited to the configurations of the above-described embodiments, nor is it limited to the above-described effects. Various modifications can be made to the present invention without departing from the gist of the present invention.

In the above embodiment, the cleaning liquid stored in the inner space of the support is supplied to the glass plate via the rotating shaft and the cleaning member, but the method of supplying the cleaning liquid is not limited to this. For example, the cleaning liquid may be sprayed onto the glass plate using a shower nozzle or the like. In other words, as long as the support table has a slide support structure that supports the rotating shaft, it does not have to be configured to store the cleaning liquid.

In the above embodiment, the case where the cleaning member of the upper surface cleaning mechanism and the cleaning member of the lower surface cleaning mechanism contact each other in the standby state without the glass plate has been described, but the present invention is not limited to this. For example, in a standby state without the glass plate, a gap smaller than the thickness of the glass plate may be formed between the cleaning member of the upper surface cleaning mechanism and the cleaning member of the lower surface cleaning mechanism. In other words, the cleaning member of the upper surface cleaning mechanism and the cleaning member of the lower surface cleaning mechanism do not have to be in contact with each other in the standby state without the glass plate. In this case, it is preferable that the rotation shaft of the upper surface washing mechanism has a retaining portion that engages with the slide support structure (for example, the shaft case) at the most downwardly projecting position (bottom dead center).

In the above embodiment, a single support base supports a plurality of rotating shafts, but each rotating shaft may be provided with its own dedicated support base.

In the above embodiment, the case where the glass plate is moved with respect to the cleaning member arranged at a fixed position has been described. may be That is, the cleaning member may be moved with respect to the glass plate arranged at a fixed position, or both the glass plate and the cleaning member may be moved.

In the above embodiment, the case of cleaning the upper and lower surfaces of the glass plate at the same time has been described, but only the upper surface of the glass plate may be cleaned.

In the above embodiment, the glass plate may be inclined such that one end side is positioned lower than the other end side in the width direction perpendicular to the conveying direction during cleaning and conveying of the glass plate. As a result, it is possible to prevent excess liquid adhering to the upper surface of the glass plate from flowing down from the upper surface of the glass plate due to its own weight and forming a liquid pool that causes contamination on the upper surface of the glass plate.

1 cleaning device 2 upper cleaning mechanism 3 lower cleaning mechanism 4 cleaning liquid 5 support 6 cleaning unit 7 shaft case 8 rotating shaft 9 cleaning member 10 slide bearing 11 slide bearing 12 rotary drive mechanism 16 cleaning member 21 weight G glass plate W rotating cleaning body S slide support structure

Claims

In a glass plate cleaning apparatus for cleaning the main surface of a glass plate,
a rotating cleaning body having a cleaning member that contacts the main surface of the glass plate and a rotating shaft that is connected to the cleaning member and rotates together with the cleaning member;
A support base that supports the rotating shaft,
A cleaning apparatus for a glass plate, wherein the support table has a slide support structure that supports the rotating shaft so as to be axially movable.
A plurality of the rotary cleaning bodies are provided,
2. The apparatus for cleaning a glass plate according to claim 1, wherein one support base includes a plurality of slide support structures that support a plurality of rotation shafts movably in their respective axial directions.
The apparatus for cleaning a glass plate according to claim 1 or 2, wherein the slide support structure is configured such that the rotating shaft moves toward the main surface of the glass plate under the weight of the rotating cleaning body.
The apparatus for cleaning a glass plate according to claim 3, wherein the rotary cleaning body has a detachable weight.
The glass plate cleaning apparatus according to any one of claims 1 to 4, wherein the slide support structure includes a sliding bearing that supports the rotating shaft rotatably and axially movably.
A method for manufacturing a glass plate, comprising a cleaning step of cleaning the main surface of the glass plate using the glass plate cleaning apparatus according to any one of claims 1 to 5.