JPH09296227A - Device for supporting metallic strip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a supporting device for a metallic strip which can prevent damage to the metallic strip at the time of changing a roller for supporting the metallic strip in a catenary type furnace. SOLUTION: This supporting device is constituted so as to arrange the rollers 10a, 10b for supporting the metallic strip rotatably to the inside and the outside in the furnace respectively in the longitudinal direction on the periphery of a rotary drum 1. In this case, a lift roller 26 for elevating/lowering the metallic strip near the rotary drum and a rotation driving mechanisms 15, 33 capable of controlling the speed and torque for both rollers are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal strip supporting device used in, for example, a continuous heat treatment furnace.

[0002]

2. Description of the Related Art Conventionally, when heat treating a metal strip in a continuous heat treatment furnace such as a catenary type furnace, it is necessary to support the metal strip on the charging side, the extracting side and the intermediate part of the furnace.
Although various methods have been proposed as a supporting method,
An example thereof is disclosed in Japanese Patent Publication No. 2-33767. In this system, two metal strip supporting rollers are rotatably arranged, for example, 180 ° apart in the longitudinal direction on the circumference of the rotating drum, and if the supporting roller in use (inside the furnace) is damaged, the rotating drum is By rotating 180 °, the other supporting roller (outside the furnace) is positioned inside the furnace to support the metal strip and to repair the supporting roller located inside the furnace.

[0003]

However, since the peripheral speed of the rotating drum during the replacement of the supporting rollers is not synchronized with the line speed at the initial stage of rotation and at the time of stop, the metal strip is damaged during the rotation of the rotating drum. Have challenges. Further, since the supporting roller is simply rotatably supported, when the metal strip is thin (light), for example, 3 mm or less, the supporting roller and the metal strip slip and the metal strip is damaged. When exchanging, the running metal strip comes into contact with the supporting roller in a stopped state, and the metal strip is damaged regardless of its thickness (weight).

[0004]

In order to solve the above-mentioned problems, a metal strip supporting apparatus according to the present invention is characterized in that, in the invention of claim 1, a metal strip supporting roller is provided in a longitudinal direction on the circumference of a rotary drum. In a metal strip supporting device rotatably arranged inside and outside the furnace, a lift roller for raising and lowering the metal strip is provided near the rotating drum. According to a second aspect of the invention, a rotation drive mechanism is provided on the supporting roller and the lift roller. According to a third aspect of the invention, the speed and torque of each of the rotary drive mechanisms can be controlled.

[0005]

Next, an embodiment of the present invention will be described with reference to the drawings. The metal strip supporting apparatus according to the present invention is generally a rotary drum 1, a metal strip supporting roller 10 (10a, 10b), and the metal strip supporting roller (hereinafter referred to as a supporting roller).
The rotary drive mechanism 15 and the lift roll mechanism 21. The rotary drum 1 is supported by bearings 5 provided on the support base 4 at both ends of its rotary shaft 3, and a belt 7 is driven by a drive motor 6 installed on the one support base 4.
It is rotatable via a sprocket 8.

The supporting roller 10 (10a, 10b)
Is rotatable in a state in which a part of the supporting roller 10 is slightly projected from the outer peripheral surface of the rotary drum 1 in a recess 2 formed by an arc surface provided 180 ° apart in the longitudinal direction of the peripheral surface of the rotary drum 1. The rotating shaft 11 is rotatably supported by bearings 14 which are detachably provided at both ends of a supporting member 13 attached to the rotating shaft 3 of the rotating drum 1. The support rollers 10 may be arranged as long as one support roller is located inside the furnace and the other support rollers are located outside the furnace.

The rotary drive mechanism 15 is rotatably mounted on the rotary shaft 3 of the rotary drum 1 via a bearing 16 and is mounted on the support base 4 and gears 17 (17a, 17b) having teeth on the outer circumference. Motor shaft 1 of the driven drive motor 18
A gear 20 attached to the gear 9 and meshing with the gear 17a
And a gear 12 that is attached to the tip of the rotary shaft 11 of the supporting roller 10a and meshes with the gear 17b.

The lift roller mechanism 21 is provided in the vicinity of the rotary drum 1, and a swing arm 23 is rotatably attached to a support base 22 via a support shaft 24.
The swing arm 23 is swingable by a cylinder 25. A lift roller 26 protruding from an arcuate opening Ta provided in the furnace wall T is rotatably attached to the tip end of the swing arm 23, and a chain sprocket 28 is attached to the roller shaft 27 thereof. . On the other hand, a chain sprocket 29 is attached to the support shaft 24, and a chain 30 is wound around the chain sprockets 28 and 29. The chain 30 is provided on the motor shaft of a drive motor 31 attached to the swing arm 23. The rotation drive mechanism 33 is configured by meshing with the chain sprocket 32.

Further, the swing arm 23 is larger than the arc-shaped opening Ta and the lift roller 2 is provided.
A movable cover 34, which rotatably penetrates through 6, is attached, moves integrally with the swing arm 23, and constantly seals the arc-shaped opening Ta. Reference numeral 35 is a guide plate that is in sliding contact with the furnace wall T.

Although only one side of the metal strip supporting device is shown in FIGS. 1 and 2, the other side is the same except for the drive motor 6 of the rotary drum 1 and the rotary drive mechanism 33 of the lift roller 26. It has the same configuration. That is, the rotary shaft 3 of the rotary drum 1 is supported by the bearing 5, and is rotatable by the drive motor 6 and the supporting roller 10b by the rotary drive mechanism 15 (not shown) similar to the above. The drive motors 18 and 31 can switch between speed control and torque control.

Next, the operation of the metal strip supporting apparatus will be described. Now, as shown in FIGS. 1 and 3, it is assumed that the metal strip W is supported and conveyed by the supporting roll 10a. In this case, the supporting roll 10a is torque-controlled by the drive motor 18 and rotates so that the torque with the traveling metal strip W becomes constant, and even if the metal strip W has any thickness, the surface thereof is hardly damaged. Support without giving. The supporting roll 10b has stopped rotating, and the lift roller 26 is rotating at a fixed position at a lower position.

When the supporting roll 10a is damaged due to long-term use and needs to be replaced, the drive motor (not shown) of the other rotary drive mechanism 15 and the drive motor 31 of the rotary drive mechanism 33 are driven. And support roller 1
0b and the rotation speed of the lift roller 26 are the metal strip W
The cylinder 25 is driven and the lift roller 26 is raised while controlling the speed to be the same as the traveling speed of, and the metal strip W is pushed up and separated from the supporting roll 10a. Then, after driving the drive motor 6 to rotate the rotary drum 1 180 ° in the traveling direction of the metal strip W, the drive motor 6 of the rotary drum 1 is stopped and the lift roller 26 is returned to its original state. The strip W is supported by the supporting roller 10b. That is, since the metal strip W is separated upward from the supporting roller 10a by the lift roller 26, even if the rotary drum 1 is subsequently rotated, the metal strip W does not come into contact with the rotary drum 1. When the metal strip W is supported by the supporting roller 10b, the supporting roller 10b is torque-controlled.

When the metal strip W is supported by the supporting roller 10b as described above, the rotation of the drive motor 18 for the supporting roller 10a is stopped. After that, the supporting roller 10a is removed from the bearing member 13 together with the bearing 14 for repair. When the repair is completed, it is attached to the bearing member 13 again, and the next supporting roller 1 is attached.
Prepare for replacement of 0b. As shown in FIG. 2, water supply / drainage pipes 21a and 21b are provided at the end of the shaft 11 on the opposite side of the rotation driving mechanism 15 of the supporting roller 10 and the rotary shaft 3, and these are provided to the rotary shaft 3 and the supporting shaft. You may make it connect with the piping which is not shown in the roller 10a, 10b, and may supply cooling water from one end of the rotating shaft 3 to cool the rotating drum 1 and the supporting rollers 10a, 10b. In addition, the lift roller 2
6 also has a water cooling structure by a known method.

In the above embodiment, the supporting rollers 10a, 10b and the lift roller 26 are provided with the rotation driving mechanisms 15, 33 for controlling the speed and the torque, and the rotation speeds of these rollers are controlled by the metal strip W. Support the metal strip W at the same transport speed, then
Although the torque control is performed, the present invention is not limited to this, and at least the speed control or the torque control may be performed by the rotary drive mechanisms 15 and 33 depending on the thickness (weight) of the metal strip W and the transport speed. The structure may be simply rotatable without providing the drive mechanisms 15 and 33.

[0015]

As is apparent from the above description, claim 1
According to the invention, since the lift roller for raising and lowering the metal strip is provided in the vicinity of the rotating drum, when the supporting roller is replaced, the metal strip is moved upward by the lift roller and does not come into contact with the rotating drum. Once in place, the rotating drum can be rotated, preventing the metal strip from contacting and damaging the rotating drum as is conventional. According to the second aspect of the present invention, each supporting roller and each lift roller can be rotated by the rotation driving mechanism, and by rotating the supporting roller and the lift roller at substantially the same speed as the metal strip, the thickness (weight) of the metal strip.
In any case, the metal strip is hardly damaged not only when the metal strip is supported but also when the switch is supported. Further, as in the invention of claim 3, the drive motors of the supporting rollers and the lift rollers are controlled in speed and torque, and the supporting rollers and the lift rollers that are on standby before the replacement of the supporting rollers are If the speed is controlled at the same speed as that of the metal strip and the torque is controlled when the metal strip is supported, the metal strip is not damaged further, and the yield of products can be improved.

[Brief description of drawings]

FIG. 1 is a partial perspective view of a metal strip supporting apparatus according to the present invention with a furnace wall removed.

2 is a cross-sectional view of a state in which the lift roll mechanism of FIG. 1 is removed.

FIG. 3 is an enlarged sectional view taken along line III-III in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Rotating drum, 2 ... Recess, 3 ... Rotating shaft, 6 ... Drive motor, 10 (10a, 10b) ... Metal strip supporting roller, 11 ... Shaft, 12, 17, 20 ... Gear, 15 ... Rotation drive mechanism , 16 ... Bearing, 18 ... Drive motor, 21 ... Lift roller mechanism, 22 ... Support base, 23 ... Swing arm,
25 ... Swing cylinder, 26 ... Lift roller, 30 ...
Chain, 31 ... Drive motor, 33 ... Rotation drive mechanism, W
... metal strip.

Claims (3)

[Claims] 1. A metal strip supporting device in which rollers for supporting a metal strip are rotatably arranged inside a furnace and outside the furnace in a longitudinal direction on a circumference of a rotating drum, and the metal strip is moved up and down in the vicinity of the rotating drum. A support device for a metal strip, characterized in that it is provided with a lift roller. 2. The metal strip supporting apparatus according to claim 1, wherein the supporting roller and the lift roller are provided with a rotation driving mechanism. 3. The support device for a metal strip according to claim 2, wherein each of the rotary drive mechanisms is capable of speed / torque control.