JP3234026U - Glass making equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a glass manufacturing apparatus for improving the efficiency of removing foreign matters adhering to a transport roll. SOLUTION: A glass manufacturing apparatus urges a transport roll 31 for transporting glass G, a removing member 32 that comes into contact with the transport roll to remove foreign matter adhering to the transport roll, and the removing member toward the transport roll. The urging member 33 is provided. The removing member includes a first plane 32a inclined with respect to the urging direction of the urging member, a second plane 32b that intersects the first plane at an obtuse angle, and a boundary line 32c between the first plane and the second plane. Then, it comes into contact with the transport roll at the boundary line. [Selection diagram] Fig. 2

Description

The present disclosure relates to a glass manufacturing apparatus.

The roll cleaning device described in Patent Document 1 removes foreign matter adhering to a transport roll that transports a glass article. The roll cleaning device includes a removing member and an urging means. The removing member comes into contact with the surface of the transport roll to remove foreign matter. The urging means urges the removing member toward the transport roll. The removing member and the urging means are configured so that the pressing vector indicating the urging direction of the removing member by the urging means starting from the contact point between the transport roll and the removing member deviates from the rotation center of the transport roll.

Japanese Unexamined Patent Publication No. 2015-11273

The removing member described in Patent Document 1 has an inclined surface that is inclined with respect to the pressing vector, and comes into contact with the transport roll at the inclined surface. The removing member makes linear contact with the transport roll on an inclined surface.

Conventionally, the line width of contact between the removing member and the transport roll is wide, the contact pressure between the removing member and the transport roll is low, and the efficiency of removing foreign matter is low.

One aspect of the present disclosure provides a technique for improving the efficiency of removing foreign matter adhering to a transport roll.

The glass manufacturing apparatus according to one aspect of the present disclosure includes a transport roll for transporting glass, a removing member that comes into contact with the transport roll to remove foreign matter adhering to the transport roll, and the removing member on the transport roll. It is provided with an urging member for urging toward. The removing member includes a first plane inclined with respect to the urging direction of the urging member, a second plane intersecting the first plane at an obtuse angle, and a boundary line between the first plane and the second plane. In contact with the transport roll at the boundary line.

According to one aspect of the present disclosure, since the boundary line between the first plane and the second plane of the removing member, that is, the corner of the removing member is brought into contact with the transport roll, the line width in which the removal member and the transport roll are in contact can be narrowed. can. Therefore, the contact pressure between the removing member and the transport roll can be improved, and the efficiency of removing foreign matter adhering to the transport roll can be improved.

FIG. 1 is a cross-sectional view showing a float glass manufacturing apparatus according to an embodiment. FIG. 2 is an enlarged cross-sectional view showing the removal member of FIG. 1 and its periphery. FIG. 3 is an enlarged cross-sectional view showing the removal member and its periphery according to the first modification. FIG. 4 is an enlarged cross-sectional view showing the removal member according to the conventional example and its periphery.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In each drawing, the same or corresponding configurations may be designated by the same reference numerals and description thereof may be omitted. In each drawing, the X-axis direction, the Y-axis direction, and the Z-axis direction are perpendicular to each other, the X-axis direction and the Y-axis direction are the horizontal direction, and the Z-axis direction is the vertical direction. The X-axis direction is the transport direction of the glass G, and the Y-axis direction is the width direction of the glass G. In the specification, "~" indicating a numerical range means that the numerical values described before and after the numerical range are included as the lower limit value and the upper limit value.

The glass manufacturing apparatus 1 according to the embodiment will be described with reference to FIG. The glass manufacturing apparatus 1 is, for example, an apparatus for manufacturing glass by a float method. The technique of the present disclosure can also be applied to an apparatus for manufacturing glass by a method other than the float method, for example, a fusion down draw method, a slot down draw method, or the like. The glass manufacturing apparatus 1 may be an apparatus including a conveying roll for conveying glass. The direction in which the glass is conveyed is not limited to the horizontal direction, and may be the vertical direction.

The glass manufacturing apparatus 1 includes a float bus 2, a dross box 3, and a slow cooling furnace 5 from the upstream side to the downstream side in the transport direction of the glass G. The glass manufacturing apparatus 1 forms the glass G on the molten metal M stored in the float bath 2, conveys the formed glass G to the slow cooling furnace 5 via the dross box 3, and slowly cools the inside of the slow cooling furnace 5. The glass manufacturing apparatus 1 cuts the slowly cooled glass G to a desired size and shape to obtain a product.

The glass G is, for example, non-alkali glass, aluminosilicate glass, borosilicate glass, soda lime glass, or the like. The non-alkali glass means a glass that does not substantially contain alkali metal oxides such as _{Na 2} O and K _{2 O.} Here, the fact that the alkali metal oxide is substantially not contained means that the total content of the alkali metal oxide is 0.1% by mass or less.

The use of the glass G is not particularly limited, but is, for example, a cover glass for a display (for example, a liquid crystal display or an organic EL display). When the use of the glass G is a cover glass, the glass G is a chemically strengthened glass. Unlike non-alkali glass, chemically strengthened glass contains an alkali metal oxide.

The use of the glass G may be a glass substrate for forming a thin film transistor or a color filter of a display. When the use of the glass G is a glass substrate, the glass G is a non-alkali glass. Unlike chemically strengthened glass, non-alkali glass contains substantially no alkali metal oxide.

The thickness of the glass G is selected according to the use of the glass G. When the use of the glass G is a cover glass for a display, the thickness of the glass G is, for example, 0.1 mm to 2.0 mm. On the other hand, when the use of the glass G is a glass substrate for a display, the thickness of the glass G is, for example, 0.1 mm to 0.7 mm. When the use of the glass G is a glass substrate for a building or an automobile, the thickness of the glass G is, for example, 2 mm to 25 mm. The thickness of the glass G is measured at the center of the glass G in the width direction.

Next, the float bus 2 and the like according to the embodiment will be described with reference to FIG. 1 again. The float bath 2 includes a bathtub 21. The bathtub 21 accommodates the molten metal M. As the molten metal M, for example, molten tin is used. In addition to molten tin, a molten tin alloy or the like can also be used, and the molten metal M may have a higher density than that of molten glass. The molten glass is continuously supplied onto the molten metal M, and is formed into a strip-shaped glass G by utilizing the smooth liquid surface of the molten metal M.

The dross box 3 includes a transport roll 31 that pulls the glass G formed on the molten metal M from the molten metal M. The transport roll 31 is also called a lift-out roll. The transport roll 31 is rotationally driven by a drive device (not shown) such as a motor, and the drive force thereof transports the glass G diagonally upward. The drive device is provided outside the dross box 3.

A plurality (for example, three) of the transport rolls 31 are arranged inside the dross box 3 at intervals in the transport direction (X-axis direction) of the glass G. The number of transport rolls 31 is not particularly limited and may be one. The axial direction of the transport roll 31 is the same as the width direction (Y-axis direction) of the glass G.

The dross box 3 includes a removing member 32 that comes into contact with the transport roll 31 and removes foreign matter adhering to the transport roll 31. The removing member 32 comes into contact with the outer peripheral surface of the transport roll 31 and removes foreign matter adhering to the outer peripheral surface of the transport roll 31. The foreign substance is, for example, the molten metal M brought into the dross box 3 together with the glass G, or an oxide obtained by oxidizing the molten metal M. The oxide of molten metal M is called dross.

The removing member 32 is, for example, a pentagon when viewed in the Y-axis direction (see FIG. 2). The pentagon is a shape in which one corner of a rectangle is cut diagonally. A plurality of removing members 32 may be provided in the axial direction of the transport roll 31. The number of removing members 32 arranged along each transport roll 31 is determined according to the width of the glass G (Y-axis direction dimension) or the axial length of the transport roll 31 (Y-axis direction dimension).

The Y-axis direction dimension of the removing member 32 is, for example, 300 mm to 1000 mm, preferably 400 mm to 800 mm. The Z-axis direction dimension of the removing member 32 is, for example, 50 mm to 200 mm, preferably 70 mm to 150 mm. The X-axis direction dimension of the removing member 32 is, for example, 20 mm to 100 mm, preferably 30 mm to 80 mm.

The removing member 32 may contain graphite powder. The maximum particle size of the graphite powder is, for example, 0.1 mm to 3 mm, preferably 0.5 mm to 2.5 mm. When the maximum particle size of the graphite powder is 0.1 mm to 3 mm, the strength of the removing member 32, which is a molded body of the graphite powder, can be ensured.

The removing member 32 may include a graphite powder molded body and a ceramic cloth. The ceramic cloth is provided, for example, on the contact surface of the removing member 32 with the transport roll 31. Instead of the graphite powder molded body, a powder molded body such as boron nitride, alkaline sulfate, alkaline earth sulfate, alkaline carbonate, alkaline earth carbonate, silica, or alumina may be used. ..

The dross box 3 includes an urging member 33 that urges the removing member 32 toward the transport roll 31. The urging direction of the urging member 33 is, for example, a vertically upward direction (X-axis positive direction). The urging direction of the urging member 33 is the direction in which the removing member 32 of the urging member 33 is urged. The urging member 33 includes, for example, a metal spring. The spring is a leaf spring. The urging member 33 may include a coil spring, a compression coil spring, a disc spring, a bamboo child spring, a ring spring, or the like instead of the leaf spring. The urging member 33 may include a fluid pressure cylinder such as a pneumatic cylinder.

The dross box 3 may include a support member 34 that supports the removal member 32 so as to be able to move up and down. The support member 34 is arranged on the bottom wall 39 of the dross box 3. The support member 34 has a U-shape in cross section perpendicular to the Y-axis direction, and the removal member 32 and the urging member 33 are arranged inside the support member 34. The support member 34 prevents the removal member 32 from shifting in the X-axis direction. The material of the support member 34 is, for example, a metal such as cast iron.

The dross box 3 may include a cooling member 35 that cools the urging member 33. The cooling member 35 includes, for example, a pipe through which a refrigerant flows. As the refrigerant, a liquid such as water or a gas such as air is used. The cooling member 35 cools the urging member 33 and suppresses thermal deterioration of the urging member 33. The cooling member 35 is provided inside the support member 34.

The dross box 3 may include an adjusting member 36 that adjusts the urging force of the urging member 33. The urging force of the urging member 33 is a force that urges the removing member 32 of the urging member 33. The adjusting member 36 includes, for example, a shim. The urging force of the urging member 33 can be adjusted by changing the number or thickness of the shims used.

When the urging member 33 is a compression spring, the thicker the adjusting member 36, the larger the amount of compression of the compression spring and the larger the urging force (elastic restoring force) of the compression spring. When the urging member 33 is a tension spring, the thicker the adjusting member 36, the larger the tension amount of the tension spring and the smaller the urging force (elastic restoring force) of the tension spring.

The adjusting member 36 is provided inside the supporting member 34. Although the adjusting member 36 is provided between the urging member 33 and the cooling member 35 in the present embodiment, the adjusting member 36 may be provided on the side opposite to the urging member 33 (for example, the lower side) with the cooling member 35 as a reference.

The dross box 3 includes a plurality of assemblies including the removing member 32, the urging member 33, the support member 34, the cooling member 35, and the adjusting member 36 at intervals in the transport direction of the glass G (for example, the X-axis direction). .. The number of assemblies is the same as the number of transport rolls 31 in this embodiment, but may be less than the number of transport rolls 31.

The slow cooling furnace 5 slowly cools the glass G to a temperature equal to or lower than the strain point of the glass while transporting the glass G by the transport roll 51. The slow cooling furnace 5 is provided with heaters (not shown) on the ceiling and bottom wall in order to adjust the temperature of the glass G. The transport roll 51 is rotationally driven by a drive device (not shown) such as a motor, and the glass G is transported in the horizontal direction by the driving force. The transport roll 51 is also called a rare roll.

The technique of the present disclosure may be applied to the slow cooling furnace 5. That is, in the slow cooling furnace 5, in addition to the transport roll 51, although not shown, a removing member that comes into contact with the transport roll 51 to remove foreign matter adhering to the transport roll 51 and a removing member are urged toward the transport roll 51. An urging member may be provided.

Next, with reference to FIG. 2, the details of the removal member 32 and the like according to the embodiment will be described. The removing member 32 is, for example, a pentagon when viewed in the Y-axis direction. The pentagon is a shape in which one corner of a rectangle is cut diagonally.

The removing member 32 has a first plane 32a, a second plane 32b, and a boundary line 32c. The first plane 32a is inclined with respect to the urging direction (for example, the Z-axis positive direction) of the urging member 33. The first plane 32a corresponds to a portion where one corner of the rectangle is cut diagonally. The first plane 32a is larger than the second plane 32b.

The second plane 32b intersects the first plane 32a at an obtuse angle. The angle θ formed by the first plane 32a and the second plane 32b is, for example, 135 ° to 175 °, preferably 150 ° to 170 °. The boundary line 32c is a boundary line between the first plane 32a and the second plane 32b.

The removing member 32 comes into contact with the transport roll 31 at the boundary line 32c. Since the corners of the removing member 32 are brought into contact with the transport roll 31, the line width of contact between the removing member 32 and the transport roll 31 can be narrowed. Therefore, the contact pressure between the removing member 32 and the transport roll 31 can be improved, and the efficiency of removing foreign matter adhering to the transport roll 31 can be improved.

As described above, in the removing member 32, the first plane 32a and the second plane 32b intersect at an obtuse angle at the boundary line 32c. The angles that intersect at obtuse angles are more durable than the angles that intersect at acute angles. Therefore, even if the contact pressure between the removing member 32 and the transport roll 31 is improved, the occurrence of chipping can be suppressed.

The removing member 32 has a first side surface 32d that intersects the first plane 32a at an obtuse angle, and a second side surface 32e that intersects the second plane 32b at a right angle. The first side surface 32d and the second side surface 32e are planes parallel to each other.

The removal member of Patent Document 1 does not have a surface corresponding to the second plane 32b of the present embodiment, and the surface corresponding to the first plane 32a and the surface corresponding to the second side surface 32e intersect at an acute angle. The corners that intersect at acute angles have low durability.

On the other hand, according to the present embodiment, as described above, the second plane 32b exists, and the second plane 32b and the second side surface 32e intersect at right angles. Angles that intersect at right angles are more durable than angles that intersect at acute angles.

The second plane 32b intersects the second side surface 32e at a right angle in the present embodiment, but may intersect at an obtuse angle. In this case, the first plane 32a and the second plane 32b are inclined in opposite directions to form a chevron shape.

As shown in FIG. 2, the support member 34 has a pair of facing surfaces 34a and 34b orthogonal to the transport direction (for example, the X-axis direction) of the glass G. The removing member 32 is inserted between the pair of facing surfaces 34a and 34b. The distance between the pair of facing surfaces 34a and 34b is set to be larger than the thickness of the removal member 32 in consideration of the difference in thermal expansion between the removal member 32 and the support member 34. The material of the removing member 32 is, for example, graphite, and the material of the support member 34 is, for example, cast iron.

Conventionally, as shown in FIG. 4, the horizontal upper surface of the removing member 32 and the lower end of the transport roll 31 are in contact with each other. The transport roll 31 pushes the removal member 32 back vertically downward. There was a gap between the pair of facing surfaces 34a and 34b and the removing member 32, and the removing member 32 was easily shaken in the X-axis direction, which sometimes caused a large vibration.

According to the present embodiment, as shown in FIG. 2, the straight line L connecting the rotation center line 31a of the transport roll 31 and the boundary line 32c of the removal member 32 is, for example, far from the rotation center line 31a of the transport roll 31. Indeed, it goes toward the upstream side in the transport direction of the glass G (for example, the negative direction of the X-axis). The boundary line 32c of the removing member 32 comes into contact with the transport roll 31 on the upstream side in the transport direction from the lower end of the transport roll 31. The removing member 32 comes into contact with the pair of facing surfaces 34a and 34b in an inclined state. In the Y-axis direction, the first side surface 32d and the second side surface 32e are inclined toward the upstream side (X-axis negative direction) of the glass G in the transport direction toward the urging direction (Z-axis positive direction) of the urging member 33. doing.

As shown in FIG. 3, the farther the straight line L is from the rotation center line 31a of the transport roll 31, the more it may be toward the downstream side of the glass G in the transport direction (for example, the positive direction of the X-axis). In this case, the boundary line 32c of the removing member 32 comes into contact with the transport roll 31 on the downstream side in the transport direction from the lower end of the transport roll 31. The removal member 32 shown in FIG. 3 comes into contact with the pair of facing surfaces 34a and 34b in a state of being tilted in the direction opposite to that of the removal member 32 shown in FIG. In the Y-axis direction, the first side surface 32d and the second side surface 32e are inclined toward the downstream side (X-axis positive direction) of the glass G in the conveying direction toward the urging direction (Z-axis positive direction) of the urging member 33. doing.

According to the removal member 32 of FIG. 2, the posture of the removal member 32 can be stabilized and the vibration of the removal member 32 can be reduced as compared with the removal member 32 of FIG. This is because, as shown in FIG. 2, the frictional force F acting on the removing member 32 from the transport roll 31 acts in a direction that promotes the inclination of the removing member 32, and strongly presses the removing member 32 against the support member 34. As shown in FIG. 3, when the frictional force F acts in the direction of reducing the inclination of the removing member 32, the force for pressing the removing member 32 against the support member 34 becomes weak, and the removing member 32 vibrates.

Although the glass manufacturing apparatus according to the present disclosure has been described above, the present disclosure is not limited to the above-described embodiment and the like. Various changes, modifications, replacements, additions, deletions, and combinations are possible within the scope of the utility model registration claims. Of course, they also belong to the technical scope of the present disclosure.

1 Glass manufacturing equipment 31 Conveying roll 32 Removal member 32a First plane 32b Second plane 32c Boundary line G Glass

Claims (6)

A transport roll that transports glass and
A removing member that comes into contact with the transport roll and removes foreign matter adhering to the transport roll.
An urging member that urges the removing member toward the transport roll,
With
The removing member includes a first plane inclined with respect to the urging direction of the urging member, a second plane intersecting the first plane at an obtuse angle, and a boundary line between the first plane and the second plane. A glass manufacturing apparatus having the above and in contact with the transport roll at the boundary line. The glass according to claim 1, wherein the straight line connecting the rotation center line of the transport roll and the boundary line of the removal member is directed toward the upstream side in the transport direction of the glass as the distance from the rotation center line of the transport roll increases. manufacturing device. The glass manufacturing apparatus according to claim 1 or 2, wherein the urging direction of the urging member is a vertically upward direction. The glass manufacturing apparatus according to any one of claims 1 to 3, further comprising a cooling member for cooling the urging member. The glass manufacturing apparatus according to any one of claims 1 to 4, further comprising an adjusting member for adjusting the urging force of the urging member. The glass manufacturing apparatus according to any one of claims 1 to 5, wherein the transport roll is a lift-out roll that pulls up the glass formed on the molten metal from the molten metal.

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