JPH0788524A - Strip guide device - Google Patents

Abstract

PURPOSE:To guide at the time of a high speed transfer and a transfer by holding even a thin strip without any trouble. CONSTITUTION:A strip 1 is sucked toward a strip guide surface 36 by a differential pressure between a high speed air flow 39 and the outdoor air by injecting air 15 from a nozzle 40, and forming a high speed air flow 39 between a strip guide surface 36 and the strip 1. A mechanism is made so that the strip 1 is floated and guided with an approximately constant interval to a strip guide surface 36 by the high speed air flow 39 existing between the strip guide surface 36 and the strip 1. And, a strip 1 with arbitrary width and dimensions, can be coped with adjusting the positions of plural strip guide device main bodies 37 and 38 in the width direction 9 by using a width direction moving device 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strip guide device.

[0002]

2. Description of the Related Art As shown in FIG. 5, in a conventional hot rolling line, when a strip 1 is transported, a hot run table 3 formed by arranging a number of table rollers 2 is used to movably guide the lower surface of the strip 1. Was.

In the figure, 4 is the line direction of the hot rolling line, 5 is a rolling mill for rolling the strip 1, 6 is a down coiler for winding the strip 1, 7 is a pinch roll for guiding the strip 1 to the down coiler 6. , 8 are side guides for adjusting the position of the strip 1.

[0004]

However, the hot run table 3 as the conventional strip guide device has the following problems.

That is, when the strip 1 to be guided becomes thin, the rigidity of the strip 1 decreases, so that the strip shown in FIG.
As shown in Fig. 7, the tip of the strip 1 that has left the final rolling mill 5 and becomes a free end enters between the table rollers 2 and hangs down, or, as shown in Fig. 7, exits the final rolling mill 5 to increase the tension. There arises a problem that the released rear end of the strip 1 sags in an uneven shape following the table rollers 2.

Moreover, when the thin strip 1 is conveyed at high speed, the tip of the strip 1 is moved to the table roller 2.
Since the tips of the strips 1 bounce and bend, and the tips of the strips 1 float up due to air resistance as shown in FIG. It was impossible to carry it at high speed.

As described above, the thinner the strip 1, the more difficult it is to handle, and there is a limit to the high speed conveyance of the front and rear end portions of the strip 1 by the hot run table 3.

In view of the above situation, it is an object of the present invention to provide a strip guide device capable of guiding a thin strip without any trouble.

[0009]

SUMMARY OF THE INVENTION The present invention comprises a strip guide surface facing a strip with a required gap.
A plurality of strip guide device bodies each having a nozzle for forming a high-speed gas flow between the strip guide surface and the strip are arranged in the width direction of the strip, and the strip guide device body is moved in the width direction of the strip. The present invention relates to a strip guide device including a direction moving device.

[0010]

The operation of the present invention is as follows.

By injecting a gas such as air from the nozzle to form a high-speed gas flow between the strip guide surface and the strip, the strip is sucked toward the strip guide surface by the pressure difference between the high-speed gas flow and the outside air. At the same time, the strip is suspended and guided with a substantially constant gap with respect to the strip guide surface by the high-velocity gas flow interposed therebetween.

Since the strip is thus floated and guided in a non-contact state with the strip guide surface, it becomes possible to convey a thin strip at high speed.

Further, by using the width direction moving device to adjust the positions of the strips of the plurality of strip guide device main bodies in the width direction, it becomes possible to correspond to the strips of any width dimension.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 4 show an embodiment of the present invention.

In the figure, 1 is a strip, 3 is a hot run table formed by arranging a number of table rollers 2, 4 is the line direction of the hot rolling line, 5 is a rolling mill, and 8 is provided in the middle of the hot rolling line. Side guides 9 are in the width direction of the strip 1, 10 is a drive motor for the table roller 2, 11 is a guide plate of the side guides 8, and 12 is a width adjusting device such as a cylinder connected to the guide plate 11.

Above the hot rolling line, there is provided a carriage 14 movable along the guide member 13 extending in the width direction 9 between the inside and outside of the hot rolling line, and the carriage 14 is provided with a pair of lifting guides 15. A body 16 'of the width direction moving device 16 is provided so as to be able to move up and down along the elevating guide 15, and the height of a cylinder or the like that is vertically expandable and retractable between the carriage 14 and the width direction moving device body 16' is adjusted. The device 17 is interposed.

Inside the width direction moving device body 16 ', two upper and lower reverse screw screws 18 and 19 extending in the width direction 9 are arranged, and both ends are rotatably supported by bearings 20. Gear 2 attached to one end of 19
An expansion / contraction drive device 24 such as a motor is connected to the motors 1 and 22 via a gear 23, and a position adjustment signal 25 from the outside and a position detection signal 27 from a rotational position detector 26 attached to the expansion / contraction drive device 24 are connected. An arithmetic and control unit 29 for inputting and sending a command signal 28 to the scaling drive unit 24 is provided.

A pair of left and right nuts 30 and 31 are screwed onto the respective reverse screw screws 18 and 19, and
31 is connected to support brackets 33 and 34 extending downward from an opening 32 extending in the width direction 9 formed in the lower portion of the width direction moving device body 16 ′, and the support bracket 34 connected to the lower nut 31 is located inward. Then, the support bracket 33 connected to the upper nut 30 is arranged so as to be located outside.

The above-described structure is provided in pairs in the upstream and downstream portions in the line direction 4.

Then, at a position between a pair of width direction moving device main bodies 16 'provided in the line direction 4, there is a gap 35 with respect to the upper surface of the hot run table 3 and extends in the line direction 4, and a strip guide surface 36 is provided on the lower surface. A plurality of (two pairs in this embodiment) gas chambers 37, 38 (strip guide device main body) are provided, and each of the support brackets 33,
Gas chambers 37 and 38 are fixed to the lower ends of 34, respectively.

Furthermore, each gas chamber 37, 38 extends in the line direction 4 and is inclined towards the width end on the corresponding side of the strip 1, the strip guide surface 36 and the strip 1.
A slit-shaped nozzle 40 for forming a high-speed gas flow 39 is formed between and.

A flow path such as an air supply flow path 43 for supplying a gas such as air 42 from a gas supply source such as an air pump 41 is connected to the gas chambers 37 and 38, and the air supply flow path 4 is connected.
A flow rate adjusting valve 44 for adjusting the flow rate of the air 42 is provided in the middle of 3.

45 is a strip 1 and a gas chamber 37,
It is a gap formed with 38.

Next, the operation will be described.

If the strip 1 is thick, the rolling mill 5
The strip 1 delivered to the delivery side is supported and transported by the hot run table 3.

If the strip 1 is a thin material having a thickness of about 1.2 mm or less and cannot be supported and transported by the hot run table 3, the strip 1 is transported as follows.

That is, first, the arithmetic and control unit 29 inputs the position adjusting signal 25 from the outside and the position detecting signal 27 from the rotational position detector 26 attached to the expansion / contraction driving device 24 and takes the difference between them. A command signal 28 is sent to the expansion / contraction driving device 24 such as a motor to drive the expansion / contraction driving device 24 so as to eliminate the deviation, and the expansion / contraction driving device 24 is provided inside the width direction moving device main body 16 ′ via the gears 23, 22, 21. The reverse screw screws 18 and 19 are rotated to move the pair of nuts 30 and 31 screwed to the reverse screw screws 18 and 19 in the width direction 9,
Through the support brackets 33, 34, the gas chamber 3
The positions of 7, 38 are adjusted to match the width dimension of the strip 1.

In this state, the air 42 is fed from the air pump 41 to the gas chambers 37 and 38 through the air feed passage 43 at a required flow rate according to the opening of the flow rate adjusting valve 44. It is ejected from the slit-shaped nozzle 40 formed in the chambers 37 and 38 toward the strip guide surface 36.

The nozzles 40 are then inclined towards the corresponding width ends of the strip 1, so that a high-velocity gas flow 39 is formed along the lower surface of the strip guide surface 36.

Due to Bernoulli's principle, this high-speed gas flow 39 causes the pressure on the upper surface side of the strip 1 to be lower than the pressure of the stationary outside air on the lower surface side of the strip 1, so that the pressure difference between the two causes the strip to flow. 1 is attracted to the strip guide surface 36.

When the strip 1 is sucked and approaches the strip guide surface 36 to some extent, the gap 4 between the strip guide surface 36 and the strip guide surface 36 is reduced.
5 becomes narrower, the fluid resistance of the high-speed gas flow 39 increases, and the pressure of the air 42 between them increases, so the suction force is weakened by that amount, and at a position where the suction force and the self-weight of the strip 1 are balanced, The strip 1 is suspended and guided with respect to the strip guide surface 36.

Here, the strip guide surface 36 has a function of determining the posture of the strip 1 to be sucked and held, and a portion where external air cannot enter is positively formed so that the high speed gas flow 3
9 has a function of improving the suction holding efficiency and securing a necessary suction holding area.

The high-velocity gas flow 39 may flow in a direction other than the width direction 9 of the strip 1.

As described above, when the strip 1 is thin, the strip 1 can be suspended and guided by the high-speed gas flow 39 in a stable non-contact state with respect to the strip guide surface 36, so that the tension of the strip 1 is applied. It is possible to hold even the front and rear edges that are not provided, without any hindrance, and perform high-speed conveyance or guide during high-speed conveyance.

Further, according to the present invention, the reverse screw 1
By rotating 8 and 19 to adjust the positions of the plurality of gas chambers 37 and 38, it becomes possible to accommodate the strip 1 having an arbitrary width dimension.

Furthermore, the height of the gas chambers 37 and 38 is adjusted by expanding and contracting the height adjusting device 17 through the widthwise moving device body 16 ', so that the strip 1
It is possible to adjust the gap 35 between the upper surface of the hot run table 3 and the strip guide surface 36 according to the thickness dimension of the hot run table 3.

Further, when unnecessary, the carriage 14 can be carried out and removed from the hot rolling line.

The present invention is not limited to the above-described embodiment, but it is sufficient that the number of gas chambers is two or more, the gas may be nitrogen gas, etc. It goes without saying that various changes can be made within the range not covered.

[0040]

As described above, according to the strip guide device of the present invention, even a thin strip can be held without any trouble for high-speed conveyance or guide during conveyance, and moreover, the strip guide device main body can be provided. By providing a plurality of strips in the width direction and allowing them to move in the width direction, it is possible to obtain an excellent effect that it is possible to cope with a change in the width dimension of the strip.

[Brief description of drawings]

FIG. 1 is a schematic side view of an embodiment of the present invention.

FIG. 2 is a partially enlarged view of FIG.

FIG. 3 is a view taken along the line III-III in FIG.

FIG. 4 is an operation diagram of FIG. 3.

FIG. 5 is a schematic side view of a conventional example.

FIG. 6 is a side view showing the hanging down of the tip of the strip.

FIG. 7 is a side view showing a droop at the rear end of the strip.

FIG. 8 is a side view showing lifting of the strip tip.

[Explanation of symbols]

1 strip 9 width direction 16 width direction moving device 16 'width direction moving device body 35 gap 36 strip guide surface 37, 38 strip guide device body (gas chamber) 39 high-speed gas flow 40 nozzle

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hiroshi Takayo, 1st Shin-Nakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Ishi, Kawashima Harima Heavy Industries, Ltd. Yokohama Second Factory (72) Hiroaki Kuwano Isogo-ku, Yokohama-shi, Kanagawa Shin-Nakahara Town No. 1 Ishi Kawashima Harima Heavy Industries Co., Ltd. Yokohama No. 2 Factory (72) Inventor Tsukasa Otani Shin Nakahara Town No. 1 Shin Nakahara-machi Ishi Kanagawa Prefecture Yokohama City No. 2 Ishi Kawashima Harima Heavy Industries Co., Ltd. Yokohama No. 2 Factory (72) Invention Person Hiroyuki Yoshimura 1 Kawasaki-cho, Chuo-ku, Chiba, Chiba Prefecture Chiba Works, Kawasaki Steel (72) Inventor Soichiro Onda 1 Kawasaki-cho, Chuo-ku, Chiba, Chiba Prefecture Chiba Works (72) Inventor Nobuhiro Ito 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Kawasaki Works Chiba Works

Claims (1)

[Claims] 1. A strip guide device main body comprising a strip guide surface facing a strip with a required gap and a nozzle for forming a high-speed gas flow between the strip guide surface and the strip. 1. A strip guide device, comprising a plurality of width direction moving devices arranged in the direction, and moving the strip guide device body in the width direction of the strip.