JPH08277130A - Edge roll apparatus for producing float glass - Google Patents

Abstract

PURPOSE: To raise the sealability in a metallic bath and improve the durability of a sealing material. CONSTITUTION: This edge roll apparatus for producing a float glass is obtained by securing one end of a sealing material 70 to the peripheral edge of a through- hole 17A in a sidewall part of a metallic bath 15, installing the other end of the sealing material 70 in the edge roll apparatus body, sealing the gap between through-hole 17A and the rotating shaft 66, covering the peripheral surface of the rotating shaft 66 with the sealing material 70 and deforming the sealing material following up to the displacement of the rotating shaft 66. Metallic bellows 74 are used as the sealing material 70.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an edge roll device for producing a float glass, in which an edge roll is brought into contact with a glass ribbon edge surface in a metal bath and the edge roll is rotated to pull the glass ribbon in a direction to widen the width of the glass ribbon.

[0002]

2. Description of the Related Art In the production of float glass, molten glass in a tank kiln is poured onto tin in a metal bath, and the molten glass is spread on the tin to a substantially equilibrium thickness. Then, the rotational speed of the layer roll provided on the downstream side of the metal bath is adjusted to pull the molten glass ribbon spread in the metal bath to a substantially equilibrium thickness. The molten glass ribbon pulled by the layer roll is stretched on tin to form a glass ribbon having a certain thickness, which is conveyed to the downstream side via the layer roll and cooled. Therefore, the plate glass having a desired plate thickness is manufactured by adjusting the rotational speed of the layer roll to change the draw ratio of the molten glass ribbon.

In the case of manufacturing a thin glass sheet having a thinner plate thickness by such a method, it is necessary to increase the draw ratio by the layer roll. However, if the draw ratio of the molten glass is increased only by increasing the rotation speed of the layer roll, the conveying speed of the layer roll is significantly increased, and further, the plate width of the glass ribbon is narrowed, which is not practical. Therefore, as shown in FIG. 6, through holes 3 are formed in both walls 2A, 2B of the metal bath 2, respectively.
A and 3A ... and through holes 3B, 3B ...
The edge rolls 4, 4 ... Are inclined and arranged in the metal bath 2 through A, 3A ... And through holes 3B, 3B. Then, the edge rolls 4, 4, ... Are brought into contact with the edge surface of the glass ribbon 6 and rotated to pull the glass ribbon 6 outward in the width direction by the edge rolls 4, 4.

As a result, even if the rotation speed of the layer rolls 8, 8 ... Is increased, the plate thickness of the glass ribbon 6 can be made thin without making the plate width of the glass ribbon 6 too narrow. The transport speed can be set to various values. The edge rolls 4, 4, ... Are rotatably supported by the edge roll device.
In order to position the ... in the proper position of the glass ribbon, it is necessary to swing and move back and forth. Therefore, the edge roll device is attached to the carriage with casters.

In this case, the shaft 4A for supporting the edge roll 4 is supported in an inclined state as shown in FIG. The through holes 3A, 3A ... And the through holes 3B, 3B ... Formed in both walls 2A, 2B of the metal bath 2 are closed by a bellows 9 made of cloth.

[0006]

However, when the edge roll 4 is placed at a desired position so as to come into contact with the edge surface of the glass ribbon 6, the shaft 4A is attached to the metal bath 2.
It is necessary to move the shaft 4A in the axial direction (the arrow direction in FIG. 7) in order to push it in or pull it out of the metal bath 2. Further, it is necessary to rotate the shaft 4A to rotate the edge roll 4. Therefore, since the end 9A of the bellows 9 needs to be formed in a free state with respect to the shaft 4A, a gap S is formed between the end 9A of the bellows 9 and the shaft 4A. Therefore, there is a problem that the metal bath 2 has a poor sealing property. Further, since the bellows 9 is generally made of cloth, there is a problem that the bellows 9 is easily broken and has low durability.

The present invention has been made in view of the above circumstances, and provides an edge roll device for manufacturing a float glass capable of improving the sealing property of a metal bath and the durability of a sealing member. It is an object.

[0008]

In order to achieve the above object, the present invention arranges edge rolls in the vicinity of both side walls in the longitudinal direction in a metal bath in which molten glass is floated on tin to form a glass ribbon. Then, in the edge roll device for float glass manufacturing for pulling the glass ribbon in a direction of expanding the width of the glass ribbon by rotating the edge roll in a state of being in contact with the edge surface of the glass ribbon, the rotary shaft of the edge roll is One end of the seal material is fixed to the peripheral edge of the through hole of the side wall portion of the metal bath that is penetrated, and the other end of the seal material is attached to the edge roll device main body to form a gap between the through hole and the rotary shaft. A seal is formed, and the sealing material covers the peripheral surface of the rotary shaft, and is deformed following the displacement of the rotary shaft.

Further, in order to achieve the above object, the present invention is characterized in that the sealing material is a non-breathable cylindrical bellows.

[0010]

According to the present invention, one end of the sealing material is fixedly attached to the peripheral portion of the through hole in the side wall portion of the metal bath, and the other end of the sealing material is attached to the main body of the edge roll device to form the through hole and the rotary shaft. Seal the gap. Further, the sealing material covers the peripheral surface of the rotary shaft and deforms following the displacement of the rotary shaft. A metallic cylindrical bellows is used as the sealing material.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An edge roll device for producing a float glass according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is an enlarged view of an essential part of a peripheral part of a float glass manufacturing edge roll device according to the present invention, FIG. 2 is a sectional view thereof, and FIG. It is a front view of an apparatus. In the edge roll device 10 for manufacturing a float glass shown in FIG. 3, a horizontal beam 12 is suspended from an overhanging portion (not shown) of a metal bath 15 via support members 14, 14. A movable body 18 is slidably supported on the horizontal beam 12 via guides 16, 16 in the direction of arrow AB.

An elevating body 32 is suspended from the moving body 18 via shafts 28. The moving body 18 is provided with a drive motor 20, and the drive motor 20 drives the shaft 22, the bevel gears 24, 24, the bevel gears 26, 2
The shafts 28, 28 rotate via 6. Thereby, the ball screw 28 formed on the shafts 28, 28
The lifting and lowering body 32 moves in the vertical direction at A and 28A. Also,
An oscillating body 40 is suspended from the elevating body 32 via an oscillating arm 38. When the shaft 35 rotates, the swing arm 38 swings horizontally about the shaft 36 via the worm speed reducer 34. As a result, the swinging body 40 swings horizontally about the pin 42.

A bearing portion 58 is slidably supported on the rocking body 40 via a slide member 54 in the direction of arrow AB. Then, by driving the drive motor 44, the ball screw 50 is rotated via the drive pulley 44A, the endless belt 48, and the driven pulley 46, and the ball screw 50 is rotated.
The rotation of moves the bearing 58 in the direction of arrow AB through the nut 52 and the slide member 54. The bearing 58 has an arrow A-
By moving in the B direction, the rotating shaft 66 moves in the arrow AB direction together with the bearing 58. Rotating shaft 6
6 is rotatably supported by a bearing 58, and has a rotating shaft 66.
The front end of the metal bath 15 is arranged in the metal bath 15 through a through hole 17A in the longitudinal side wall of the metal bath 15. An edge roll 68 is coaxially fixed to the tip of the rotary shaft 66. The edge roll 68 rotates via the drive pulley 60A, the endless belt 64, the driven pulley 62, and the rotary shaft 66 when the drive motor 60 operates.

As described above, the edge roll 68 moves up and down by the movement of the elevating body 32, and swings horizontally by the movement of the rocking body 40. Further, the edge roll 68 moves in the axial direction (arrow AB direction) by the movement of the bearing 58. Thus, by moving the edge roll 68 in the vertical direction, the horizontal swing movement, and the axial direction movement, the edge roll 6 is moved.
Place 8 at the desired location and at the desired angle. Then, the edge rolls 68, 68 arranged at desired positions are brought into contact with the edges 69A of the glass ribbon 69 and rotated, whereby the edge rolls 68, 68 ... Pull the glass ribbon 69 outward in the width direction. As a result, the glass ribbon 69
Is set to the desired plate thickness.

The edge roll device 1 for producing this float glass
0 is a through hole 17A in the side wall of the metal bath 15 in the longitudinal direction.
A sealing material 70 for sealing the As shown in FIGS. 1 and 2, the sealing material 70 has a case 72 and a bellows 74. The case 72 has a bearing 72A, and the bearing 72
A rope 76 made of a highly heat-resistant heat insulating material such as kao wool rope is wound in an annular shape along the inner peripheral surface of A (see FIG. 2).
Annular stoppers 78, 78 are attached to both sides of the bearing 72A.

As a result, the circularly wound kaowal rope 76 is housed inside the bearing 72A, and the rotary shaft 66 is rotatably supported by the kaowal rope 76.
In this case, the outer circumference of the rotary shaft 66 comes into contact with the inner circumference of the circularly wound kaowal rope 76. Also, the bearing 72
A is attached to the left end portion of the rocking body 40 via a support portion 72B.

As shown in FIG. 1, a bulging plate 80 is attached to the left ends of the bearing 72A and the supporting portion 72B, and a bellows 74 is connected to the bearing 72A via the bulging plate 80. That is, the bellows 74 has a left flange 74A and a right flange 74B at the left and right ends, respectively.
And the right flange 74B of the bellows 74 is coaxially attached to the overhang plate 80. As a result, the bellows 74 is arranged coaxially with the bearing 72A.
The bellows 74 is formed of a metal member in a bellows-like tubular body, is formed so as to be expandable and contractible in the axial direction, and is deformable in a curved shape.

The left flange 74A of the bellows 74 is connected to a reducer 82 described later. The reducer 82 described above is provided with a left flange 82A and a right flange 82B at the left and right ends, respectively, and the left flange 74A of the bellows 74 is coaxially attached to the right flange 82B of the reducer 82. As a result, the bellows 74 is arranged coaxially with the reducer 82. As shown in FIGS. 1 and 2, the reducer 82 is formed in a tubular body, and the tubular body is formed such that its diameter gradually decreases toward the left.

The left flange 82A of the reducer 82 is also used.
Is coaxially attached to a right flange 84A of a side ring 84 described later. The side ring 84 described above is formed in a tubular shape, and the right flange 84A is formed at the right end portion. The side ring 84 is the wall portion 15 of the metal bath 15.
It is fitted in the through hole 17A formed in A. In this case, the right flange 84A of the side ring 84 contacts the outer wall of the metal bath 15.

As a result, the case 72, bellows 74,
The reducer 82 and the side ring 84 are coaxially and integrally connected. In addition, the bearing 72A of the case 72
The rotary shaft 66 is brought into contact with the shaft via a kaool rope 76, and the side ring 84 is fitted into the through hole 17A. In this case, the outer circumference of the side ring 84 contacts the inner circumference of the through hole 17A. Further, the outer circumference of the rotary shaft 66 contacts the inner circumference of the looped kaowle rope 76. A rotating shaft 66 is coaxially arranged in the case 72, the bellows 74, the reducer 82 and the side ring 84 which are integrally connected. Then, the through hole 17A of the metal bath 15 is closed by the case 72, the bellows 74, the reducer 82 and the side ring 84 which are integrally connected.

The operation of the edge roll device for producing a float glass according to the present invention constructed as described above will be described.
First, when the rotary shaft 66 of the edge roll 68 is moved in the vertical direction, the drive motor 20 is driven to drive the drive motor 2
With the rotational force of 0, the shafts 28, 28 rotate via the shaft 22, the bevel gears 24, 24, and the bevel gears 26, 26. As a result, the lifting / lowering body 32 moves in the vertical direction by the ball screws 28A, 28A formed on the shafts 28, 28.

Therefore, the rotary shaft 66 moves up and down through the oscillating body 40 and the bearing 58, and at the same time, the oscillating body 40.
Since the case 72 moves up and down via the right flange 74B, the right flange 74B moves up and down, and the bellows 74 is deformed into a curved shape. Here, as an example, the right flange 7 in FIG.
4B shows a state where the bellows 74 is deformed into a curved shape by moving h upwardly.

Next, when the rotary shaft 66 of the edge roll 68 is horizontally swung, the shaft 35 is turned so that the turning force of the shaft 35 is transmitted to the swing arm 38 via the worm speed reducer 34 and the shaft 36. introduce. As a result, the swing arm 38 swings horizontally about the shaft 36. When the swing arm 38 swings horizontally about the shaft 36, the swing body 40 swings horizontally around the pin 42. Therefore, through the bearing 58, the rotating shaft 6
6 swings horizontally, and the case 72 swings horizontally via the swing body 40. This allows the bellows 7
4 right flange 74B swings horizontally and bellows 7
4 is deformed into a curved shape. As an example, FIG. 5 shows a curved deformation of the bellows 74 when the right flange 74B swings in the horizontal direction by θ °.

Then, when the edge roll 68 is moved in the axial direction, the drive motor 44 is driven to rotate the ball screw 50 via the drive pulley 44A, the endless belt 48, and the driven pulley 46. When the ball screw 50 rotates, the bearing 58 moves in the arrow AB direction via the nut 52 and the slide member 54. And bearing 5
When 8 moves in the direction of arrow AB, the rotary shaft 66 moves in the direction of arrow AB together with the bearing 58. In this way, the rotation shaft 66 is moved through the bearing 58 so that the arrow A
The case 7 is moved through the swinging body 40 while moving in the −B direction.
2 swings in the direction of arrow AB, the right flange 74B
Moves in the direction of arrow AB, and the bellows 74 expands and contracts.

[0025]

As described above, according to the edge roll device for producing a float glass according to the present invention, one end of the sealing material is fixed to the peripheral portion of the through hole of the side wall portion of the metal bath, and The end is attached to the rim roll device main body to seal the gap between the through hole and the rotary shaft. Further, the sealing material covers the peripheral surface of the rotary shaft and deforms following the displacement of the rotary shaft. Thereby, the sealing property of the metal bath can be improved.

A non-breathable cylindrical bellows is used as the sealing material. Therefore, the durability of the sealing material can be improved.

[Brief description of drawings]

FIG. 1 is an enlarged view of an essential part showing an enlarged essential part of an edge roll device for producing a float glass according to the present invention.

FIG. 2 is an enlarged sectional view showing a main part of an edge roll device for producing a float glass according to the present invention.

FIG. 3 is a front view of an edge roll device for producing a float glass according to the present invention.

FIG. 4 is a cross-sectional view illustrating the operation of the sealing bellows used in the edge roll device for producing float glass according to the present invention.

FIG. 5 is a cross-sectional view illustrating the operation of the sealing bellows used in the edge roll device for producing a float glass according to the present invention.

FIG. 6 is a plan view illustrating a conventional method for manufacturing plate glass.

FIG. 7 is an enlarged view of a main part of a conventional edge roll device for manufacturing plate glass.

[Explanation of symbols]

 10 ... Edge Roll Device for Float Glass Manufacturing 15 ... Metal Bath 69 ... Glass Ribbon 69A ... Edge 17A ... Through Hole 66 ... Rotating Shaft 68 ... Edge Roll 70 ... Sealing Material 72 ... Seal Case 74 ... Bellows

Claims (2)

[Claims] 1. A state in which edge rolls are arranged in the vicinity of both side wall portions in the longitudinal direction in a metal bath in which molten glass is floated on tin to form a glass ribbon, and the edge rolls are in contact with the edge surface of the glass ribbon. In a float glass manufacturing edge roll device for pulling the glass ribbon in a direction to widen the width of the glass ribbon by rotating at, in the peripheral portion of the through hole of the side wall portion of the metal bath through which the rotary shaft of the edge roll is penetrated. One end of the sealing material is fixed, and the other end of the sealing material is attached to the edge roll device main body to seal the gap between the through hole and the rotary shaft,
The edge roll device for manufacturing a float glass, wherein the sealing material covers the peripheral surface of the rotary shaft and deforms following the displacement of the rotary shaft. 2. The edge roll device for manufacturing a float glass according to claim 1, wherein the sealing material is a non-breathable tubular bellows.