JP2002069537A - Device for sealing continuous furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display a good sealing performance without wearing a seal roll even in the case of constituting the seal roll with a low hardness material. SOLUTION: The seal roll 1 for sealing the atmosphere in a furnace from the outer air while interposing a metallic strip ST coming out/in at the outlet/ inlet of the continuous furnace, are provided. An intermediate roll 5 composed of a high hardness rubber material is arranged and this intermediate roll 5 is airtightly brought into contact with the outer periphery of the seal roll 1 composed of a low hardness rubber material and also, a sealing body 6 is airtightly brought into contact with the outer periphery of the intermediate roll 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous furnace, such as a continuous bright annealing furnace, in which a metal strip such as a strip-shaped stainless steel plate continuously enters and exits. The present invention relates to a sealing device for a continuous furnace for preventing the occurrence of odor.

[0002]

2. Description of the Related Art An example of this type of sealing device is disclosed in
-46261, which is shown in FIG. In FIG. 5, the metal strip ST moves in the vertical direction in the figure and enters and exits a not-shown continuous furnace through the cylindrical opening 81. Seal rollers 82 are provided to sandwich the metal strip ST from the left and right. These seal rollers 82 are formed by forming a rubber material 822 on the outer periphery of a metal roll 821 with a predetermined thickness. It is rotating in synchronization with. A sponge rubber body (not shown) for maintaining airtightness is interposed between a side plate 83 (only one is shown) on both end surfaces of each seal roller 82 in a direction perpendicular to the paper surface.

[0003] The rotating shaft 823 of each seal roller 82 is supported at both ends thereof by rotating arms (not shown).
3 can be moved along an arc-shaped notch 831 formed in FIG. The rotating arm is rotated by the drive cylinder,
Each seal roller 82 is pressed against the metal strip ST by urging the seal rollers 82 toward each other. Support arm 8 that rotates around shaft 84
A metal roller 85 is provided at the tip of 41 and is in contact with the peripheral surface of each seal roller 82 to discharge static electricity on the roller peripheral surface generated by contact with the metal strip ST.

[0004] Elastic diaphragms 86 are in airtight contact with other portions of the peripheral surface of each seal roller 82. The elastic diaphragm 86 is formed by attaching a cushion material to the surface of an elastic plate and covering the surface with a low-friction and wear-resistant woven cloth.
The seal roller 82 is brought into contact with the seal roller 82 at a predetermined pressure by the gas pressure supplied into the seal roller 82.

[0005]

By the way, the sealing device having the above-mentioned structure exhibits excellent sealing properties and effectively prevents the leakage of atmospheric gas in the furnace, etc., however, in order to further improve the sealing properties. When the seal roller 82 is formed of a low-hardness rubber material that does not form a gap following the unevenness of the metal strip ST, the outer periphery of the roller is easily scraped when sliding with the elastic diaphragm 86, and rubber debris is removed. There was a problem that occurred.

Accordingly, the present invention solves such a problem, and provides a sealing device for a continuous furnace that exhibits good sealing performance without shaving the roller even if the sealing roller is made of a low-hardness material. The purpose is to do.

[0007]

In order to achieve the above-mentioned object, according to the present invention, there is provided a seal roller (hereinafter referred to as a "seal roller") which sandwiches a metal strip (ST) at the entrance and exit of a continuous furnace to seal the atmosphere in the furnace with the outside air. In the sealing device for a continuous furnace provided with 1), an intermediate roller (5) made of a high-hardness material is provided, and the intermediate roller (5) is provided at one position in the outer circumferential direction of the seal roller (1) made of a low-hardness material. The sealing member (6) is brought into airtight contact with another portion of the intermediate roller (5) in the outer peripheral circumferential direction while being brought into airtight contact.

In the present invention, the sealing of the continuous furnace entrance and exit through which the metal strip enters and exits is effectively performed by the seal roller, the intermediate roller, and the sealing member which are in airtight contact with each other, and the leakage of the atmosphere gas in the furnace is prevented. Is done. In this case, even if the seal roller is made of a low-hardness material,
Since the intermediate roller is in contact with the intermediate roller rotating at substantially the same speed, the roller outer periphery of the seal roller is not shaved and shavings are not generated. Since the intermediate roller is made of a high-hardness material, even if a frictional force is generated between the intermediate roller and the non-rotating seal body, the intermediate roller is not easily shaved, and the generation of shavings is also prevented at this portion.

Here, the seal roller (1) can be made of a low-hardness rubber material, and the intermediate roller (5)
Can be made of a high-hardness rubber or metal material. The intermediate roller made of a metal material can have a water-cooled structure. According to this, the temperature of the seal roller with which the intermediate roller contacts is excessively increased due to frictional heat with the metal strip and heat of the atmosphere gas in the furnace. Is prevented.

[0010] The reference numerals in parentheses indicate the correspondence with specific means described in the embodiment described later.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows only the right half of a sealing device which is located symmetrically with respect to a metal strip ST. The sealing device has a flange 9 connected to the entrance and exit of a continuous furnace (not shown).
Moves up and down in the continuous furnace. The seal roller 1 is positioned so as to sandwich the metal strip ST from the left and right. The seal roller 1 is formed by forming a low-hardness rubber material with a predetermined thickness on the outer periphery of the metal roll in order to secure good sealing performance. It is configured. Both end surfaces of the seal roller 1 in the direction perpendicular to the paper face oppose side plates 2 (only one is shown) located close to each other, and a sponge rubber body (not shown) is provided between these to maintain airtightness. Is interposed.

A bearing member 12 (only one is shown) which receives both ends of the rotating shaft 11 of the seal roller 1 is movably positioned along a notch 21 formed in the side plate 2 and will be described later. The leading end of the rotating arm 3 reaches the periphery of the bearing member 12. The base end of the rotating arm 3 is fixed to a rotating shaft 31, and an operating arm 32 extends from the rotating shaft 31 in a direction perpendicular to the axis. The distal end of the operating arm 32 is connected to the distal end of the rod 41 of the air cylinder 4 disposed between the operating arm 32 and the flange.

In the state shown in FIG. 1 in which the rod 41 of the air cylinder 4 is retracted and retracted, the rotating arm 3 is
The seal roller 1 is urged in the counterclockwise direction in the figure, and rotates in substantially synchronism with the movement of the seal roller 1 in contact with the metal strip ST at a predetermined pressure. Rod 4 of air cylinder 4
1 is extended and advanced as shown by the chain line in the figure,
Is rotated clockwise around the rotating shaft body 31, whereby the seal roller 1 moves along the notch 21 of the side plate 2 and separates from the metal strip ST as shown by a chain line in the figure. The intermediate roller 5 is brought into contact with the outer peripheral top surface of the seal roller 1 by a structure described later.

As shown in FIG. 2, the notch 21 of the side plate 2 is formed in a substantially arc shape with the rotation shaft 31 as the center.
In addition, one end of the lower side of the rotating arm 3 is fixed to the rotating shaft body 31, and a substantially U-shaped notch 32 that opens toward the metal strip ST is formed at the end of the arm. Reference numeral 32 surrounds substantially half the circumference of the bearing member 12. The rotation shaft 51 of the intermediate roller 5 is supported by a rectangular support plate 52, and one end of the support plate 52 is rotatably connected to a shaft 53 provided on the side plate 2 (FIG. 4). The other end of the support plate 52 is connected to the support arm 54 at a vertical position (FIG. 2). The support arm 54 is formed in a U-shape as a whole so as to hold the upper and lower edges of the support plate 52, and a projection 541 formed at an intermediate position is formed on the guide shaft 22 provided on the side plate 2 in the vertical direction. It is fitted so that it can move linearly along.

Coil springs 23 and 24 are provided between the protrusion 541 and the upper and lower ends of the guide shaft 22, respectively.
As a result, the intermediate roller 5 is brought into contact with the seal roller 1 at an appropriate pressure, and rotates at substantially the same speed as the seal roller. The intermediate roller 5 is formed by forming a high-hardness rubber material with a predetermined thickness on the outer periphery of a metal roll. The intermediate roller 5 is air-tight by being pressed against the outer periphery of the seal roller 1 made of a low-hardness rubber material. Sex is maintained.

As shown in FIG. 3, a sealing body 6 is in contact with the outer peripheral side surface of the intermediate roller 5. The seal body 6 has a structure similar to that of the elastic diaphragm 86 (FIG. 5) described in the related art, in which a cushion material is adhered to the surface of an elastic plate and the surface is covered with a low-friction and wear-resistant woven cloth. It is. The seal body 6 is joined to a vertical wall of a stay plate 61 having an L-shaped cross section, and a horizontal wall of the stay plate 61 is joined to a sponge rubber body 71 arranged between the stay 9 and an angle member 72 provided on the lower surface of the flange 9. At the same time, it is fitted with a predetermined gap to a bolt 73 erected on the angle member 72. Behind the vertical wall of the stay plate 61, a coil spring 75 is provided between the stay plate and a support column 74 erected on the lower surface of the flange, and the seal body 6 is slightly deformed by the spring force while slightly deforming the sponge rubber body 71. The outer peripheral surface of the intermediate roller 5 is moved and contacted at a predetermined pressure toward the outer peripheral side surface to maintain airtightness. Note that sponge rubber bodies 76 and 77 are interposed between the side plate 2 (FIG. 4), the end surface of the intermediate roller 5 and the end wall 62 of the stay plate 61 to maintain airtightness.

According to the sealing device of this embodiment, the seal at the continuous furnace entrance and exit through which the metal strip ST enters and exits is effectively formed by the seal roller 1, the intermediate roller 5 and the seal body 6 which are in airtight contact with each other. This is performed to prevent the leakage of the atmosphere gas in the furnace. In this case, even if the seal roller 1 is made of a low-hardness rubber material, the seal roller 1 comes into contact with the intermediate roller 5 rotating at the same speed.
Therefore, there is no problem that the roller outer periphery of the seal roller 1 is shaved and rubber dust is generated. In addition, since the intermediate roller 5 is made of a high-hardness rubber material, even if a frictional force is generated between the intermediate roller 5 and the seal body 6 that is stopped without rotating, the intermediate roller 5 is not easily shaved. Also, the generation of rubber waste is prevented.

The intermediate roller 5 can be made of a metal material. In this case, the intermediate roller 5 is
It can also be used as a discharge roller for discharging static electricity generated in the apparatus. In this case, if the intermediate roller 5 has a water-cooled structure, the seal roller 1 in contact therewith is
Excessive temperature rise due to frictional heat with T and heat of the furnace atmosphere gas can be prevented. The position at which the intermediate roller 5 is brought into contact with the outer periphery of the seal roller 1 is not limited to the above embodiment, but may be any position on the outer periphery of the seal roller 1. The position where the seal body 6 contacts may be any position on the outer periphery of the intermediate roller 5.

[0019]

As described above, according to the sealing apparatus for a continuous furnace of the present invention, shavings are formed even when the sealing roller is made of a low-hardness material so that no gap is formed at the uneven contact portion with the metal strip. It does not occur and exhibits good sealing performance.

[Brief description of the drawings]

FIG. 1 is a half-part front view showing an embodiment of a sealing device of the present invention.

FIG. 2 is a front view of a half part of a seal roller installation portion.

FIG. 3 is a schematic front view of a half of a seal roller installation section including a cross section of the seal body installation section.

FIG. 4 is a horizontal sectional view of an end portion of an intermediate roller and a seal body.

FIG. 5 is a partial cross-sectional front view of a conventional sealing device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Seal roller, 2 ... Side plate, 3 ... Rotating arm, 4 ... Air cylinder, 5 ... Intermediate roller, 6 ... Seal body, ST ... Metal strip.

Claims (3)

[Claims] 1. A sealing device for a continuous furnace comprising a sealing roller for sandwiching a metal strip coming into and out of the furnace at an entrance and exit of the continuous furnace to seal the atmosphere in the furnace from the outside air, wherein an intermediate roller made of a hard material is provided. While making the intermediate roller hermetically contact one position in the outer circumferential direction of the seal roller made of a low-hardness material, and sealingly contacting the seal body with another portion in the outer circumferential direction of the intermediate roller. Features a continuous furnace sealing device. 2. The continuous furnace sealing device according to claim 1, wherein the seal roller is made of a low-hardness rubber material, and the intermediate roller is made of a high-hardness rubber material or a metal material. 3. The sealing device for a continuous furnace according to claim 2, wherein the intermediate roller made of a metal material has a water cooling structure.