JP2021113132A - Production method of glass plate, and cleaning apparatus of glass plate - Google Patents

Abstract

To certainly reduce cleaning unevenness of a glass plate in a width direction orthogonal to a conveying direction in cleaning the surface of the conveyed glass plate.SOLUTION: A production method of a glass plate includes a cleaning step for cleaning a surface Ga of a glass plate G by cleaning lines 8a-8c containing a plurality of cleaning members 10 arranged with a space S from each other in a width direction orthogonal to a conveying direction Y of the glass plate G while conveying the glass plate G. The cleaning lines 8a-8c are set with a space in the conveying direction Y. In the three cleaning lines 8a-8c, the location of the space S does not overlap with each other in the width direction.SELECTED DRAWING: Figure 2

Description

The present invention relates to a method for manufacturing a glass plate and a device for cleaning the glass plate.

High-definition flat panel displays (FPDs) such as liquid crystal displays, plasma displays, and organic EL displays are being promoted. Along with this, a precise electric circuit is formed on the glass plate used as the substrate for the FPD in the manufacturing process of the FPD. Therefore, this type of glass plate is required to have high cleanliness without dust and dirt.

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

Examples of the method for cleaning the glass plate include the method disclosed in Patent Document 1. In the same document, two cleaning rows in which a plurality of disc-shaped cleaning members are arranged side by side in the width direction orthogonal to the transport direction of the glass plate are provided at intervals in the transport direction. By rotating each cleaning member included in the two cleaning rows, the surface of the conveyed glass plate is cleaned.

Here, a gap is formed between the cleaning members adjacent to each other in each cleaning row in order to avoid interference between the adjacent cleaning members.

Japanese Unexamined Patent Publication No. 2017-14060

In Patent Document 1, in order to prevent uneven cleaning in the width direction of the glass plate, the cleaning member included in one of the two cleaning rows is replaced with the cleaning member included in the other cleaning row. On the other hand, they are arranged so as to be offset in the width direction of the glass plate.

However, in the two rows of cleaning rows, at the position corresponding to the gap between the adjacent cleaning members of one cleaning row and the position corresponding to the gap between the adjacent cleaning members of the other cleaning row, The surface of the glass plate comes into contact with the cleaning member only once. Therefore, at the position corresponding to the gap, the contact time between the cleaning member and the glass plate is inevitably shortened, and cleaning unevenness in the width direction of the glass plate may still occur. If such uneven cleaning occurs, streaky stains may remain on the glass plate, which may cause poor cleaning.

Moreover, if one of the two cleaning rows (or some cleaning members of one cleaning row) becomes unusable due to a failure or the like, until one of the cleaning rows is repaired or replaced. It is necessary to clean the glass plate with only one of the other cleaning rows. When the glass plate is cleaned only by the other cleaning row in this way, the surface of the glass plate cannot be cleaned at a position corresponding to the gap between the adjacent cleaning members included in the cleaning row. As a result, uneven cleaning in the width direction of the glass plate, which can cause poor cleaning, is likely to occur.

An object of the present invention is to surely reduce cleaning unevenness in the width direction of a glass plate orthogonal to the transport direction when cleaning the surface of the glass plate to be transported.

The present invention, which was devised to solve the above problems, uses a cleaning row including a plurality of cleaning members arranged with a gap in the width direction orthogonal to the transport direction of the glass plate while transporting the glass plate. A method for manufacturing a glass plate including a cleaning step for cleaning the surface of the glass plate. A plurality of cleaning rows are provided at intervals in the transport direction, and the multiple rows of cleaning rows are in the width direction of the gap. It is characterized by including three or more wash rows whose positions do not overlap each other. Here, the term "front surface of the glass plate" means at least one surface of the front and back surfaces of the glass plate. That is, the present invention includes a case where only one side of the glass plate is cleaned and a case where both sides of the glass plate are cleaned. Further, in the term "a plurality of cleaning rows include three or more types of cleaning rows whose positions in the width direction of the gap do not overlap each other", the plurality of cleaning rows includes three or more types of cleaning rows as a whole. If so, the case where a plurality of cleaning rows of the same type (cleaning rows in which the positions in the width direction of the gap overlap each other) are included is also included. According to such a configuration, even if the positions in the width direction of the gaps do not overlap each other, even if the positions correspond to the gaps in the cleaning row of any one (one row) of the three or more cleaning rows, the glass Since the plate comes into contact with the cleaning members included in the remaining two or more types of cleaning rows at least twice, a sufficient cleaning time can be secured. In addition, any one (one) cleaning row (or cleaning member included in the cleaning row) of the three or more cleaning rows whose positions in the width direction of the gap do not overlap each other cannot be used due to a failure or the like. However, the entire width of the glass plate can be cleaned without gaps in the remaining two or more cleaning rows (two rows). Therefore, it is possible to reliably reduce the uneven cleaning of the glass plate in the width direction.

In the above configuration, it is preferable that the gaps in the cleaning rows whose positions in the width direction do not overlap each other are positioned so as to repeat at equal intervals in the width direction. In this way, the gaps of the cleaning rows in which the positions of the gaps in the width direction do not overlap each other appear at regular intervals in the width direction. Therefore, the variation in the total contact time between the cleaning member and the glass plate due to the influence of the gap can be suppressed to be small in the width direction. Therefore, it is possible to more reliably reduce the uneven cleaning of the glass plate in the width direction.

In the above configuration, a pair of upper and lower rollers including an upper roller and a lower roller are arranged on each of the upstream side and the downstream side in the transport direction of the plurality of rows of cleaning rows, and the glass plate is vertically sandwiched by the upper and lower roller pairs. It may be transported by. In this way, the posture of the glass plate is stabilized when the glass plate is washed by a plurality of washing rows.

The present invention, which was devised to solve the above problems, comprises a transport mechanism for transporting a glass plate and a cleaning row including a plurality of cleaning members arranged with a gap in a width direction orthogonal to the transport direction of the glass plate. It is a glass plate cleaning device provided with, and a plurality of cleaning rows are provided at intervals in the transport direction, and there are three or more types of cleaning rows in which the positions in the width direction of the gap do not overlap each other. It is characterized by including a washing line of. According to such a configuration, it is possible to obtain the same effect as the corresponding configuration described above.

According to the present invention, when cleaning the surface of the glass plate to be transported, it is possible to reliably reduce the cleaning unevenness of the glass plate in the width direction orthogonal to the transport direction.

It is a side view which shows the cleaning apparatus of a glass plate. It is a top view which shows the arrangement state of the cleaning member included in the cleaning row. It is sectional drawing which shows the glass plate cleaning mechanism. It is sectional drawing which shows the lower end part (tip part) side of a spindle case enlarged. It is sectional drawing which shows the upper end part (base end part) side of a spindle case enlarged.

Hereinafter, the glass plate cleaning apparatus and the glass plate manufacturing method according to the present embodiment will be described with reference to the drawings. Note that XYZ in the figure is a Cartesian coordinate system. The X and Y directions are horizontal, and the Z direction is vertical. The Y direction is the transport direction of the glass plate, and the XZ plane including the X direction and the Z direction is a plane orthogonal to the transport direction of the glass plate.

As shown in FIG. 1, the glass plate cleaning device 1 according to the present embodiment includes a cleaning area W and a drying area D, and while transporting the glass plate G in the Y direction, the upper surface Ga and the lower surface thereof. Gb is washed at the same time.

In the cleaning area W and the drying area D, one end side of the glass plate G is lower than the other end side in the width direction of the glass plate G orthogonal to the transport direction Y (the direction forming an angle θ with the X direction in FIG. 3). It is transported in an inclined position so that it is located. As a result, excess liquid adhering to the upper surface Ga of the glass plate G is prevented from flowing down from the upper surface Ga of the glass plate G due to its own weight, and a liquid pool causing stains is formed on the upper surface Ga of the glass plate G. There is. The glass plate G may be conveyed in a horizontal position in the cleaning area W and / or the drying area D.

The cleaning device 1 includes a drawing rollers 2 and 3 for removing liquid adhering to the upper surface Ga and the lower surface Gb of the glass plate G, an upper cleaning mechanism 4 for cleaning the upper surface Ga of the glass plate G, and a glass plate in the cleaning area W. It is provided with a lower cleaning mechanism 5 for cleaning the lower surface Gb of G. The glass plate G is supplied to the cleaning area W by an arbitrary mechanism such as a transport roller arranged on the upstream side thereof.

The drawing rollers 2 and 3 are composed of a pair of upper and lower rollers including upper rollers 2a and 3a and lower rollers 2b and 3b that sandwich and convey the glass plate G vertically. That is, the drawing rollers 2 and 3 also function as a transport mechanism. In the present embodiment, the drawing rollers 2 and 3 are arranged on the upstream side and the downstream side of the cleaning mechanisms 4 and 5, respectively.

The drawing rollers 2 and 3 are composed of rollers made of a material capable of absorbing a liquid (for example, a soft sponge), but are not limited thereto.

In the upper cleaning mechanism 4, the cleaning liquids C are stored in the internal space in order to supply the cleaning liquids C to the cleaning rows 6a to 6c provided in three rows at intervals in the transport direction Y and the cleaning liquids C to the respective cleaning rows 6a to 6c. It includes a housing 7.

The lower cleaning mechanism 5 includes cleaning rows 8a to 8c provided in three rows at intervals in the transport direction Y so as to face each other with the cleaning rows 6a to 6c of the upper cleaning mechanism 4 sandwiching the glass plate G. In order to supply the cleaning liquid C to the cleaning rows 8a to 8c, a housing 9 in which the cleaning liquid C is stored is provided in the internal space.

As the cleaning liquid C, for example, a liquid such as a cleaning liquid (for example, liquid detergent) or a rinsing liquid (for example, water) can be used.

Here, the lower cleaning mechanism 5 has a configuration in which the upper cleaning mechanism 4 is turned upside down, and has substantially the same configuration and operation effect as the upper cleaning mechanism 4. Therefore, in the following, the configuration of the upper cleaning mechanism 4 will be described as an example, and the detailed description of the configuration of the lower cleaning mechanism 5 will be omitted.

As shown in FIG. 2, each cleaning row 6a to 6c of the upper cleaning mechanism 4 includes a plurality of cleaning members 10 arranged in a row with a gap S in the width direction of the glass plate G orthogonal to the transport direction Y. ing. Each cleaning member 10 is a disk-shaped rotating body capable of rubbing and cleaning the upper surface Ga of the glass plate G. The cleaning members 11 included in the cleaning rows 8a to 8c of the lower cleaning mechanism 5 form a pair with the cleaning members 10 included in the cleaning rows 6a to 6c of the upper cleaning mechanism 4 so as to sandwich the glass plate G. The pair of cleaning members 10 and 11 rotate in the same direction as each other.

The three rows of cleaning rows 6a to 6c are arranged so as to be offset in the width direction so that the positions of the gaps S in each row in the width direction (range of the gaps S in each row) do not overlap each other. That is, the three cleaning rows 6a to 6c are composed of three types of cleaning rows in which the positions of the gaps S in the width direction do not overlap each other. Therefore, when viewed in the transport direction Y, the two cleaning rows included in the remaining two rows are included in any of the gaps S of the cleaning rows included in any one of the cleaning rows 6a to 6c. A part of the cleaning member 10 is located.

As a result, the glass plate G is a cleaning member included in the remaining two rows of cleaning rows at a position in the width direction corresponding to any gap S of any one row of cleaning rows in the three rows of cleaning rows 6a to 6c. Since it comes into contact with 10 twice, a sufficient cleaning time can be secured. Further, even if any one of the three cleaning rows 6a to 6c (or the cleaning member 10 included in the cleaning row) becomes unusable due to a failure or the like, the remaining two cleaning rows are used for glass. The entire width of the plate G can be washed without gaps. Therefore, it is possible to reliably reduce the cleaning unevenness of the glass plate G in the width direction.

Further, in the present embodiment, in order to suppress the total contact time between the glass plate G and the cleaning member 10 from varying in the width direction, the gaps S of the three rows of cleaning rows 6a to 6c are constant in the width direction. It is located so as to repeat at the interval ΔL. Thereby, the cleaning unevenness of the glass plate G in the width direction can be reduced more reliably. The gaps S of the three rows of cleaning rows 6a to 6c may be positioned so as to repeat at unequal intervals in the width direction.

The diameter of the cleaning member 10 is preferably, for example, 50 to 200 mm, and the width of the gap S is preferably, for example, 2 to 10 mm. The repetition interval ΔL of the gap S can be appropriately set according to the diameter of the cleaning member 10 and the type of cleaning row.

The plurality of cleaning rows may be composed of four or more rows as long as they include three types of cleaning rows in which the positions of the gaps S in the width direction do not overlap with each other. From the viewpoint of suppressing an increase in equipment cost, it is preferable that the cleaning row having a plurality of rows is composed of 20 rows or less. From the same viewpoint, the number of types of cleaning rows included in the plurality of cleaning rows is preferably 5 or less.

As shown in FIG. 3, the upper cleaning mechanism 4 has a configuration for supplying the cleaning liquid C stored in the housing 7 to each cleaning member 10 of the three rows of cleaning rows 6a to 6c. In the present embodiment, the cleaning liquid C is supplied from one housing 7 to each cleaning member 10 of the three rows of cleaning rows 6a to 6c (see FIG. 1). The cleaning liquid C may be supplied from a plurality of housings, for example, by providing a dedicated housing for each of the three rows of cleaning rows 6a to 6c.

In the upper cleaning mechanism 4, the housing 7 is inclined in accordance with the inclination of the upper surface Ga of the glass plate G. Due to the inclination of the housing 7, each cleaning member 10 of each cleaning row 6a to 6c is inclined according to the upper surface Ga of the glass plate G. The inclination angle θ of the upper surface Ga of the glass plate G with respect to the horizontal plane is preferably 2 to 10 °, for example.

The upper cleaning mechanism 4 faces the spindle case 12 fixed to the housing 7 so as to face the internal space of the housing 7 and the internal space of the spindle case 12 at positions corresponding to each cleaning member 10. The spindle case 12 includes a spindle 13 rotatably held. The cleaning member 10 is attached to the lower end portion of the spindle 13 on the outside of the housing 7 and the spindle case 12.

A tubular slide bearing (bushing) 14 is press-fitted and fixed to the lower end of the spindle case 12, and a tubular slide bearing (bushing) 15 is press-fitted and fixed to the upper end of the spindle case 12. The outer peripheral surface of the spindle 13 is rotatably held by the bearing surfaces (inner peripheral surfaces) of the slide bearings 14 and 15. The slide bearings 14 and 15 may be made of, for example, metal, but in the present embodiment, they are made of resin (for example, made of engineering plastic).

The cleaning member 10 is attached to the spindle 13 via the spacer 16. The cleaning member 10 and the spacer 16 are removable from the spindle 13.

The cleaning member 10 includes a cleaning portion 10a that comes into contact with the upper surface Ga of the glass plate G and scrubs and cleans the upper surface Ga of the glass plate G, and a support portion 10b to which the cleaning portion 10a is attached. The cleaning unit 10a may be, for example, a brush or the like, but in the present embodiment, it is a pad made of a sponge, a non-woven fabric, or the like.

The contact pressure of the cleaning member 10 with respect to the glass plate G is preferably set to be smaller than the contact pressure of the upper rollers 2a and 3a with respect to the glass plate G. As a result, the straight running stability of the glass plate G in the transport direction Y is improved. The contact pressure of the cleaning member 10 with respect to the glass plate G is, for example, adjusting the position of the upper cleaning mechanism 4 with respect to the glass plate G and changing the thickness of the spacer 16 (including the case where the spacer 16 is not attached). ) Etc. can be adjusted.

The housing 7 is provided with a supply path R1 for supplying the cleaning liquid C from the outside to the internal space of the housing 7, and the cleaning liquid stored in a tank (not shown) arranged outside the housing 7. C is pumped into the internal space of the housing 7 through the supply path R1 as shown by an arrow a by a pump (not shown) or the like. By pumping the cleaning liquid C, the pressure of the cleaning liquid C supplied to the internal space of the housing 7 is maintained in a high state. In addition, one or a plurality of supply paths R1 are provided in the housing 7.

The spindle case 12 is provided with a communication passage R2 that communicates the internal space of the housing 7 and the internal space of the spindle case 12, and the cleaning liquid C in the internal space of the housing 7 communicates with the communication passage as shown by the arrow b. It is supplied to the internal space of the spindle case 12 through R2.

The spindle 13 and the spacer 16 are provided with a communication passage R3 for communicating the internal space of the spindle case 12 and the cleaning member 10, and the cleaning liquid C in the internal space of the spindle case 12 is provided with the communication passage R3 as shown by the arrow c. It is supplied to the cleaning member 10 through. The communication passage R3 is composed of a through hole provided in the spindle 13 and a through hole provided in the spacer 16.

The cleaning member 10 is provided with a through hole R4 communicating with the communication passage R3, and the cleaning liquid C supplied by the communication passage R3 is supplied to the glass plate G through the through hole R4 as shown by an arrow d. ing. The through hole R4 may be omitted when the cleaning member 10 is made of a material (for example, a porous body) that can permeate the cleaning liquid C.

In this way, the cleaning liquid C is supplied to the cleaning liquid C in the order of the internal space of the housing 7, the internal space of the spindle case 12, the cleaning member 10, and the glass plate G by the supply passage R1, the communication passage R2, the communication passage R3, and the through hole R4. Be supplied. Therefore, the cleaning liquid C supplied to the internal space of the housing 7 is directly supplied to each cleaning member 10 via the communication passage R2 and the communication passage R3, so that complicated piping for supplying the cleaning liquid is not required and the cleaning liquid C is not required. There is less waste.

Further, since most of the spindle case 12 and the spindle 13 are immersed in the cleaning liquid C stored in the internal space of the housing 7, the spindle case 12 and the spindle 13 are cooled by the cleaning liquid C. Can also be expected. Therefore, it is considered that the thermal expansion of the spindle case 12 and the spindle 13 can be reduced and the rotational operation of the spindle 13 can be maintained satisfactorily while the spindle 13 is rotated to clean the glass plate G. In the present embodiment, the plurality of spindle cases 12 and the plurality of spindles 13 corresponding to the cleaning members 10 of the cleaning rows 6a to 6c are immersed in the cleaning liquid C in one housing 7.

Here, in the present embodiment, the inclination of the housing 7 causes a height difference in the housing 7 at a position corresponding to each cleaning member 10 included in the cleaning rows 6a to 6c. Therefore, the amount of the cleaning liquid C supplied to each cleaning member 10 included in the cleaning rows 6a to 6c may vary due to the pressure difference due to the height difference. Therefore, although not shown, from the viewpoint of reducing the variation in the supply amount of the cleaning liquid C due to the height difference, in each of the cleaning rows 6a to 6c, the lower passage R3 is more than the higher passage R3. Also preferably has a portion having a small opening area. Specifically, for example, the opening area of the through hole of the spacer 16 located at the lower position may be smaller than the opening area of the through hole of the spacer 16 located at the higher position, or the opening area of the through hole of the spindle 13 located at the lower position. Is preferably smaller than the opening area of the through hole of the spindle 13 located at a higher position. Alternatively, an orifice may be provided in a part of the through hole of the spindle 13 to change the opening area.

The upper cleaning mechanism 4 includes a rotation driving mechanism 17 that rotationally drives the spindle 13 for each cleaning row 6a to 6c. The rotation drive mechanism 17 applies a rotation drive force to the upper end portion of the spindle 13 on the outside of the housing 7 and the spindle case 12.

The rotation drive mechanism 17 includes a gear mechanism 18 and a drive unit 19. The gear mechanism 18 includes a plurality of gears 18a attached to the upper ends of each spindle 13, and the gears 18a adjacent to each other in the X direction are meshed with each other. The drive unit 19 includes a motor 19a and a gear 19b attached to the motor 19a, and the gear 19b meshes with the gear 18a on one end side of the gear mechanism 18 in the X direction. Therefore, when the gear 19b is rotated by the rotation of the motor 19a, the power is transmitted to the gear mechanism 18 so that each spindle 13 rotates.

The gears 18a and 19b may be made of, for example, metal (for example, SUS), but in the present embodiment, they are made of resin (for example, engineering plastic). The gears 18a and 19b may be made of metal and resin in combination.

In each of the cleaning rows 6a to 6c, since the gears 18a adjacent to each other in the X direction are directly meshed with each other, the spindle 13 and the cleaning member 10 adjacent to each other in the X direction rotate in opposite directions. (See FIG. 2), the gears may be increased to rotate in the same direction as each other. Further, the power transmission unit is not limited to the gear mechanism 18, and may be another means such as a belt. Further, a drive unit may be individually attached to each spindle 13.

As shown in FIGS. 4 and 5, between the bearing surface of the slide bearing 14 and the outer peripheral surface of the lower end portion of the spindle 13, and between the bearing surface of the slide bearing 15 and the outer peripheral surface of the upper end portion of the spindle 13. In each case, liquid layers C1 and C2 are formed. The liquid layers C1 and C2 are formed by the cleaning liquid C supplied to the internal space of the spindle case 12 exuding from the portions corresponding to the liquid layers C1 and C2. Therefore, since the liquid layers C1 and C2 have a lubricating function derived from the cleaning liquid C, wear of the slide bearings 14, 15 and / or the spindle 13 can be prevented.

The exudation of the cleaning liquid C forming the liquid layers C1 and C2 is likely to occur by increasing the pressure of the cleaning liquid C in the internal space of the housing 7. The pressure of the cleaning liquid C in the internal space of the housing 7 can be adjusted, for example, by changing the supply amount of the cleaning liquid C to the internal space of the housing 7 per unit time.

As shown in FIG. 1, the cleaning device 1 includes air knives 20a and 20b and a transfer roller 21 in the drying area D. The air knife 20a is arranged above the transfer roller 21, and the air knife 20b is arranged below the transfer roller 21.

In the drying area D, while transporting the glass plate G by the transport roller 21, high-pressure gas is injected from the air knives 20a and 20b onto the upper surface Ga and the lower surface Gb of the glass plate G to remove the moisture adhering to these surfaces. Remove. In the drying area D, the glass plate G may be dried by a known drying means other than the air knives 20a and 20b. Further, the drying area D may be omitted.

Next, a method for manufacturing a glass plate according to the present embodiment will be described. The present manufacturing method includes a cleaning step using the above-mentioned glass plate cleaning device 1.

Specifically, the method for manufacturing a glass plate includes, for example, a molding step, a slow cooling step, a plate sampling step, a cutting step, a cleaning step (including a drying step), an inspection step, and a packing step. ing. A heat treatment step may be provided after the plate sampling step. Further, an end face processing step may be provided after the cutting step.

In the molding step, a glass ribbon is molded from molten glass by a known method such as an overflow down draw method or a float method.

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

In the plate-taking step, the slowly cooled glass ribbon is cut into predetermined lengths to obtain a plurality of original glass plates.

In the heat treatment step, the original glass plate is heat-treated, for example, in a heat treatment furnace.

In the cutting step, the original glass plate is cut to a predetermined size to obtain one or a plurality of glass plates G. As a method of cutting the original glass plate, for example, bending stress breaking in which a scrib line formed along the planned cutting line is advanced by bending stress, and initial cracks formed in a part of the planned cutting line are laser-irradiated and rapidly cooled. Laser cutting that advances along the planned cutting line by the generated thermal stress, laser cutting that cuts along the planned cutting line while melting by laser irradiation, and the like can be used. The glass plate G preferably has a rectangular shape. The size of one side of the glass plate G is preferably 1000 mm to 3000 mm, the plate thickness is preferably 0.05 mm to 10 mm, and more preferably 0.2 mm to 0.7 mm.

In the end face processing step, end face processing including grinding, polishing and corner cutting of the end face is performed on the glass plate G.

In the washing step, the glass plate G is washed while being conveyed in an inclined posture by using the above-mentioned washing device 1, and then dried.

In the inspection step, the surface of the washed glass plate G is inspected for scratches, dust, dirt, etc., and / or for internal defects such as air bubbles, foreign substances, etc. 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 plate G satisfying the desired quality is packed. Packing is performed by laminating a plurality of glass plates 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 laminating direction.

The present invention is not limited to the configuration of the above embodiment, and is not limited to the above-mentioned action and effect. The present invention can be modified in various ways without departing from the gist of the present invention.

In the above embodiment, the case where the cleaning liquid is supplied using the housing in which the cleaning liquid is stored has been described, but the method for supplying the cleaning liquid is not limited to this. For example, the cleaning liquid may be sprayed and supplied to the cleaning member and / or the glass plate using a shower nozzle or the like.

In the above embodiment, the drawing roller may be omitted. Further, the drawing roller may be replaced with a transport roller composed of a pair of upper and lower rollers that do not adsorb liquid. In this case, the transport roller may be configured to sandwich and transport only both ends of the glass plate G in the width direction, that is, to not contact the central portion of the glass plate G in the width direction.

In the above embodiment, even if at least one of the pair of cleaning members facing the glass plate thickness direction can be moved between the reference position and the retracted position in the glass plate thickness direction. good. That is, it is detected by a sensor or the like that the glass plate has been conveyed to a predetermined position, and based on the detection result, at least one of the pair of cleaning members facing each other in the thickness direction of the glass plate is retracted. By moving the glass plate from the to the reference position in the plate thickness direction, the facing distance between the pair of cleaning members may be narrowed so that the pair of cleaning members come into contact with the glass plate.

In the above embodiment, the upper cleaning mechanism and the lower cleaning mechanism may have different configurations. For example, if the cleaning liquid is supplied on the upper surface side of the glass plate, the cleaning liquid supplied to the upper surface is also supplied to the lower surface of the glass plate along the surface of the glass plate. Therefore, the lower cleaning mechanism does not have to have a configuration in which the cleaning member directly supplies the cleaning liquid to the glass plate.

In the above embodiment, the case where one cleaning area is provided in the cleaning device has been described, but a plurality of cleaning areas may be provided. In this case, a drying area may be provided on the downstream side of each cleaning area, or a drying area may be provided only on the downstream side of the most downstream cleaning area.

In the above embodiment, the case where both sides of the glass plate are cleaned at the same time has been described, but only one side of the glass plate may be cleaned.

1 Cleaning device 2 Squeezing roller 3 Squeezing roller 4 Upper cleaning mechanism 5 Lower cleaning mechanism 6a to 6c Cleaning row 7 Housing 8a to 8c Cleaning row 9 Housing 10 Cleaning member 11 Cleaning member 13 Spindle G Glass plate W Cleaning area D Drying Area C Cleaning liquid S Gap

Claims (4)

A glass plate provided with a cleaning step of cleaning the surface of the glass plate by a cleaning row including a plurality of cleaning members arranged with a gap in a width direction orthogonal to the transport direction of the glass plate while transporting the glass plate. It is a manufacturing method of
The cleaning rows are provided in a plurality of rows at intervals in the transport direction, and
A method for manufacturing a glass plate, wherein the plurality of rows of cleaning rows include three or more types of cleaning rows in which the positions of the gaps in the width direction do not overlap each other. The glass plate according to claim 1, wherein the gaps in the width direction do not overlap each other, and the gaps in the cleaning row are positioned so as to repeat at equal intervals in the width direction. Production method. A pair of upper and lower rollers including an upper roller and a lower roller are arranged on each of the upstream side and the downstream side in the transport direction of the plurality of rows of cleaning rows, and the glass plate is vertically sandwiched between the upper and lower roller pairs for transport. The method for manufacturing a glass plate according to claim 1 or 2, wherein the glass plate is manufactured. A glass plate cleaning device including a transport mechanism for transporting a glass plate and a cleaning row including a plurality of cleaning members arranged with a gap in a width direction orthogonal to the transport direction of the glass plate.
The cleaning rows are provided in a plurality of rows at intervals in the transport direction, and
A glass plate cleaning apparatus, wherein the plurality of rows of cleaning rows include three or more types of cleaning rows in which the positions of the gaps in the width direction do not overlap each other.

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