JPH08188831A - Pinch type bridle device in metallic strip passing line - Google Patents

Abstract

PURPOSE: To prevent the insertion of a metallic strip between segments of a caterpillar, at the time of applying to the passing metallic strip having thin thickness and low tension in a caterpillar system bridle device. CONSTITUTION: This bridle device is provided with the upper and the lower one pair of the caterpillar bodies 1a, 1b, an endless belt 2 shiftably stretched at the outside of at least upper part caterpillar body, and guide rolls 3A, 3B for endless belt arranged at the inlet side and the outlet side of the caterpillar body, and constituted so as to linearly shift each of the upper and and lower caterpillar bodies at a pinch part for metallic strip. Further, this bridle device is constituted so as to bring the endless belt with contact with only the linear shifting part of the caterpillar body by forming the linear part of the endless belt between the guide rolls. Since the metallic strip is brought into contact with only the linear shifting part of the caterpillar body without inserting between the segments of the caterpillar body by the endless belt interposed between the caterpillar body and the metallic strip, the slippage is not developed between the endless belt and the segment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pinch type bridle device used in a metal strip line such as a continuous heat treatment line for steel strips.

[0002]

2. Description of the Related Art As a method for industrially producing a high silicon steel strip having a Si content of 4 wt% or more, a continuous siliconizing treatment method for a steel strip is known. In this manufacturing method, a siliconizing treatment furnace is provided in the continuous processing line, and Si: 4 is set in the siliconizing treatment furnace.
A high silicon steel strip enriched in Si is manufactured by subjecting a thin steel strip of less than wt% to a series of treatments such as heating, siliconizing treatment, diffusion heat treatment and cooling.

[0003]

In such a continuous processing line, it is necessary to provide a bridle device for separating the tension on the outlet side of the siliconizing treatment furnace. This bridle device is a high silicon after the siliconizing treatment. In order to pass the converted steel strip, it is impossible to use a bridle device (bridle roll) of a type in which a plate is wound around a roll, which is used in a general heat treatment furnace. This is because the high silicon steel strip is very brittle and easily breaks when bent by a bridle roll. Further, since the tension of the steel strip in the siliconizing furnace is very small, it is difficult to control the tension itself with the bridle device of the roll type.

A caterpillar type bridle device as shown in FIG. 4 is known as a device suitable for controlling the tension on the outlet side of the siliconizing treatment furnace. This device comprises a pair of upper and lower caterpillar bodies 21a and 21b that pinch the steel strip S, a holding mechanism 22 (cylinder device, etc.) for holding the upper caterpillar body 21a and pressing down the steel strip S, and upper and lower caterpillar bodies. And a drive device (not shown) that rotationally drives 21a and 21b. Upper and lower track bodies 21a,
21b is composed of a chain belt in which a large number of rectangular segments 23 are connected, and an annular guide mechanism 26 for holding the chain belt is provided inside each of them (in FIG. 4, the guide mechanism 26 is provided only for the lower caterpillar 1b). (Shown) is provided, and each track body 21a, 2a
A sprocket wheel 24 that drives a chain belt is provided at one end on the inner side of 1b. Therefore,
The caterpillar bodies 21a and 21b are driven by the sprocket wheel 24 and cyclically move along an annular guide mechanism 26. Further, a rubber coating layer is formed on the upper surface of each segment 23.

The annular guide mechanism 26 is constructed so as to hold the steel strip pinch portion in the caterpillar circumferential direction in a straight line shape and the other portions in an appropriate shape such as an arc shape, whereby the upper and lower portions are held. In the steel strip pinch portions of the caterpillar bodies 21a, 21b, a plurality of segments 23 are moved linearly with their ends contacting each other, and the linear movement portion 25 can pinch the steel strip S. Therefore, in this bridle device, the steel strip S can be reliably pinched by surface contact with the linear moving portions 25 of the upper and lower caterpillar bodies 1a, 1b, whereby the tension separating function can be achieved without bending the steel strip S.

[0006]

However, when such a bridle device is arranged on the outlet side of the siliconizing treatment furnace, the following problems occur. That is, the upper and lower caterpillar bodies 21a and 21b of the bridle device are composed of a large number of segments 23 each having a width of about 40 mm. As shown in FIG. 5, these segments 23 are moved in a straight line immediately before the steel strip S is pinched. The ends contact each other immediately before the transition to the portion 25, but in the process of the trailing segment 23 coming into contact with the preceding segment 23, the corner portion of the trailing segment 23 as shown in the partially enlarged view of FIG. And the preceding segment 2
There is a problem that the steel strip S is sandwiched between the steel strip 3 and the steel strip 3 and the steel strip is broken, and such a steel strip fold is a direct cause of plate breakage.

Such a phenomenon is relatively unlikely to occur when the steel strip is thick or the tension is high, but the high silicon steel strip manufactured in the continuous siliconizing line has a plate thickness of 0.1 mm.
Since many of them are extremely thin and pass through with low tension, the steel strip is significantly broken due to the above phenomenon. Further, this phenomenon is particularly remarkable on the side of the upper caterpillar body. Therefore, an object of the present invention is to prevent a metal strip from being sandwiched between segments and to be broken even when applied to a metal strip that is thin in thickness and passes through with low tension in a caterpillar bridle device. , To provide an improved bridle device.

[0008]

The constitution of the device of the present invention for solving such a problem is as follows. (1) A pair of upper and lower caterpillar bodies that pinch a metal strip, an endless belt that is movably stretched outside the upper caterpillar body, and a part of the circumferential direction is in contact with the metal strip pinch part of the upper caterpillar body, and the upper portion. With a guide roll arranged at each position on the metal strip entrance side and the exit side with respect to the caterpillar body to guide the endless belt, and configured to move the upper and lower caterpillar bodies linearly at the metal strip pinch portion, A pinch type bridle device in a metal strip threading line, wherein the endless belt is configured to contact only the linear moving portion of the upper caterpillar body by forming a straight portion of the endless belt between the guide rolls.

(2) A pair of upper and lower caterpillar bodies for pinching the metal strip, and an endless belt movably stretched outside the respective caterpillar bodies, a part of which in the circumferential direction is in contact with the metal strip pinch portion of each caterpillar body. And guide rolls arranged at respective positions on the metal strip entrance side and the metal strip exit side of each caterpillar body to guide the endless belt, and the upper and lower caterpillar bodies are linearly moved by the metal strip pinch portion. In addition, by forming a linear portion of the endless belt between the guide rolls, the endless belt is configured to contact only the linear moving portion of each caterpillar body, the pinch type in the metal strip passing line Bridle device.

[0010]

In the apparatus according to the first aspect of the present invention, the metal strip that passes through the linear moving portions of the rotating upper and lower caterpillar bodies is pinched, but a part of the endless belt in the circumferential direction is located above the metal strip pinch portion. The metal band is not sandwiched between the segments of the upper track body because it is interposed between the track body and the metal band. The endless belt is moved by the rotational driving force of the upper track body due to the frictional force between the endless belt or the upper track body, or is moved substantially in synchronization with the track body by the driving means for the endless belt.

Further, the moving speed of the segment of the caterpillar body is different between the linear moving portion which is the metal band pinch portion and the arcuate moving portion which is the upstream side portion thereof, and the endless belt is the linear moving portion of the caterpillar body. If it is in contact with not only the arcuate moving portion but also the above-mentioned speed difference, slippage may occur between the endless belt and the segment, and as a result, tension fluctuation may occur in the metal strip and the plate may be broken. In this respect, in the device of the present invention, the linear portion of the endless belt is formed between the guide rolls,
Since the endless belt is configured to contact only the linear moving portion of the upper caterpillar body, slip does not occur between the endless belt and the segment due to the speed difference. Further, according to the apparatus of the second aspect, the above-described action can be obtained not only in the upper track body but also in the lower track body.

[0012]

1 and 2 show an embodiment of the present invention, in which an endless belt is provided only on an upper track body. The device of the present invention is the same as the conventional bridle device shown in FIG. 4 in the structure of the upper and lower caterpillar bodies, the holding mechanism of the upper caterpillar body, the driving mechanism of each caterpillar body, and the like. The detailed illustration and description of are omitted. The apparatus of this embodiment has a pair of upper and lower track bodies 1 for pinching a metal strip.
a, 1b, an endless belt 2 that is movably stretched outside the body of the upper caterpillar 1a, and a guide roll 3A that guides the endless belt 2 at each position of the metal strip insertion side and the ejection side with respect to the upper caterpillar body 1a. 3B, the tension adjusting roll 4 of the endless belt, and the like.

The caterpillar bodies 1a and 1b have a large number of rectangular segments 5 as in the bridle device shown in FIG.
Is composed of a chain belt which is connected to the sprocket wheels and rotationally driven between sprocket wheels, and each metal strip pinch portion is configured as a linear movement portion 6 in which a plurality of segments 5 can move linearly by contacting the end portions. I am doing it. Further, as in the apparatus of FIG. 4, inside the respective track bodies 1a and 1b, the metal band pinch portion in the track circumferential direction is held in a straight line shape, and the other portions are held in an appropriate shape such as an arc shape. A guide mechanism for this is provided. Further, this bridle device also includes a holding device (a cylinder device or the like) for holding the upper track body 1a and pressing down the metal band S, and a drive device for rotating and driving the upper and lower track bodies 1a, 1b. .

The endless belt 2 includes guide rolls 3A,
By being wound between 3B and the tension adjusting roller 4, it is stretched outside the upper track body 1a so as to surround it. The guide rolls 3A and 3B are supported by the bracket 13 so that the upper track body 1a is supported.
It is located on the entry side and the exit side. Guide roll 3A,
3B forms a linear portion 7 of the endless belt 2 between them so that the endless belt 2 is only in contact with the linear moving portion 6 of the upper track body 1a.

The tension adjusting roll 4 is held by a frame body 8 so that it can be raised and lowered, and the tension of the endless belt 2 is adjusted by raising and lowering it. The frame body 8 has a guide portion 9 in the vertical direction, and the tension adjusting roll 4 is attached to the guide portion 9 via a bearing member 10 so as to be able to move up and down. A holding shaft 11 with a handle 12 is screwed into the screw hole at the upper end of the frame body 8, and the lower end of the holding shaft 11 is rotatably connected to the bearing member 10 and is held by the handle 12. Axis 11
By rotating and raising and lowering, the tension adjusting roll 4
Can be raised and lowered.

In the present embodiment, the endless belt 2 has a frictional force with the upper caterpillar body 1a to cause the upper caterpillar body 1 to move.
Although it is configured to move by the rotational driving force of a,
Depending on the case, the guide roll 3A, the guide roll 3B,
At least one of the tension adjusting rollers 4 may be a drive roll, or a separate drive roll may be provided and moved. Further, a rubber coating layer is formed on the upper surface of the segment 5 forming the caterpillar bodies 1a, 1b in order to obtain a predetermined pinch force, but it is not necessarily limited to such a configuration, and for example, the entire segment May be made of metal. The material of the endless belt 2 is not particularly limited, and the material normally used for industry may be used.

In the apparatus of the above embodiment, the metal strip S passed through the linear moving portions 6 of the rotating upper and lower caterpillar bodies 1a, 1b is pinched and a part of the endless belt 2 in the circumferential direction. Intervenes between the upper track body 1a and the metal band S in the metal band pinch portion, and prevents the metal band from being sandwiched between the segments 5 of the upper track body 1a. The endless belt 2 is moved by the rotational driving force of the upper track body 1a due to the frictional force between the endless belt 2 and the upper track body 1a. In addition, the endless belt 2 is provided between the guide rows 3A and 3B.
Since the linear portion 7 is formed and the endless belt 2 is configured to contact only the linear moving portion 6 of the upper caterpillar body 1a, the endless belt 2 does not slip between the segment 5 and the caterpillar body 1a. Move in sync with.

FIG. 3 shows another embodiment of the present invention.
In this embodiment, not only the upper track body 1a but also the lower track body 1b is provided with the endless belt 2, the guide rolls 3A and 3B, the tension adjusting roller 4, and the like.
Since each specific configuration is the same as that of the embodiment shown in FIG. 1, the same reference numerals are given and detailed description will be omitted.

[0019]

According to the present invention described above, even when applied to a metal plate having a thin plate thickness and passing through with low tension, a metal band is not caught between the segments and is not broken. The tension control in the line can be performed without causing trouble such as plate breakage. Therefore, the device of the present invention is extremely useful as a bridle device or the like provided on the exit side of the siliconizing process furnace of the continuous process line.

[Brief description of drawings]

FIG. 1 is a front view partially showing an embodiment of the device of the present invention.

FIG. 2 is a front view partially showing a guide portion by the guide roll of the embodiment shown in FIG.

FIG. 3 is a front view showing another embodiment of the device of the present invention.

FIG. 4 is a front view showing a conventional caterpillar bridle device.

5 is an explanatory view schematically showing a state in which the conventional bridle device shown in FIG. 4 pinches a steel strip.

[Explanation of symbols]

1a, 1b ... Caterpillar body, 2 ... Endless belt, 3A, 3
B ... Guide roll, 4 ... Tension adjusting roll, 5 ... Segment, 6 ... Linear moving part, 7 ... Straight part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuhisa Okada 1-2 1-2 Marunouchi, Chiyoda-ku, Tokyo Nihon Steel Pipe Co., Ltd.

Claims (2)

[Claims] 1. A pair of upper and lower caterpillar bodies that pinch a metal strip, and an endless belt that is movably stretched outside the upper caterpillar body and has a circumferential portion that is in contact with a metal strip pinch portion of the upper caterpillar body. A guide roll arranged at each position on the metal strip entrance side and the metal strip exit side with respect to the upper caterpillar body for guiding the endless belt, and the upper and lower caterpillar bodies are configured to move linearly at the metal strip pinch portion. Along with this, by forming a linear portion of the endless belt between the guide rolls, the endless belt is configured to contact only the linear moving portion of the upper caterpillar body, a pinch type bridle in a metal strip passing line. apparatus. 2. A pair of upper and lower caterpillar bodies that pinch a metal strip, and a movably stretched outer side of each caterpillar body,
An endless belt, a part of which in the circumferential direction is in contact with the metal band pinch portion of each caterpillar body, and a guide roll that is arranged at each position of the metal band entry side and the exit side with respect to each caterpillar body to guide the endless belt, By configuring each of the upper and lower caterpillar bodies to move linearly with the metal band pinch portion, and by forming the linear portion of the endless belt between the guide rolls, the endless belt is the linear movement portion of each caterpillar body. A pinch type bridle device in a metal strip passing line, characterized in that it is configured so as to contact only with it.