JP3360891B2 - Strip position adjusting device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strip position adjusting device used for a hot rolling line, a strip conveying line in a plating facility, and the like. As shown in FIG. 6, in a hot rolling line, a strip 2 finished and rolled by a finishing mill 1 is
The sheet is conveyed by a run-out table 4 having a plurality of table rollers 3 arranged side by side, and is taken up by a down coiler 6 through a pinch roll 5. [0003] Conventionally, a side guide 7 as shown in FIG. 7 is provided as a strip position adjusting device on the entrance side of the pinch roll 5.
The position of the strip 2 can be adjusted by adjusting the distance between the pair of guide plates 9 by the cylinder 8 or the like and restraining the strip 2 from both sides. [0004] However, the conventional strip position adjusting device has the following problems. [0005] That is, while the strip 2 is supported on the run-out table 4, the position of the strip 2 in the width direction is adjusted by the side guide 7, but the frictional force between the table roller 3 and the strip 2 is adjusted. Is large, the movement of the strip 2 in the width direction is restricted, and it has been difficult to freely adjust the position of the strip 2 in the width direction. Further, if the side guide 7 is forcibly adjusted in position in the width direction of the strip 2, the strip 2
There was a problem that a scratch, a pushing scratch, or an edge portion was damaged. In view of the above circumstances, an object of the present invention is to provide a strip position adjusting device capable of freely adjusting the position without damaging the strip. [0008] According to an aspect of the present invention, moves to the strip width <br/> direction or line relative strip width direction
A strip position adjusting pinch roll device provided with a roll capable of tilting in a direction , and a strip provided with a nozzle capable of generating a fluid film for floatingly supporting the strip at an output side of the strip position adjusting pinch roll device. The present invention relates to a strip position adjusting device provided with a floating device. The operation of the present invention is as follows. [0010] A fluid film is generated by the fluid ejected from the nozzle of the strip floating device, and the strip is floated and supported by the fluid film. In this state, the strip is easily moved in the width direction by moving the roll of the pinch roll device for adjusting the strip position in the strip width direction or tilting the roll in the line direction with respect to the strip width direction. . Therefore, it is possible to freely adjust the position in the width direction without damaging the strip. Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show a first embodiment of the present invention. In the figure, 2 is a strip, 4 is a run-out table in which a plurality of drivable table rollers 3 are arranged, 10 is a line direction, and 34 is a width direction. A tilting device 11 such as a cylinder which can be extended and contracted in the line direction 10 in the middle of the strip 2 transport line.
A strip position adjusting pinch roll device 13 including a pair of upper and lower rolls 12 that can be tilted in the line direction 10 is provided. A fluid 15 such as air or water from a fluid supply source 14 such as an air pump is supplied to a fluid supply path 16 and a flow regulating valve below the run-out table 4 at the outlet side of the strip position adjusting pinch roll device 13. A fluid chamber 18 is supplied through the strip 17 and the strip 2 is positioned between the fluid chamber 18 and each table roller 3.
A plurality of nozzles 19 capable of ejecting the fluid 15 toward the lower surface are provided, and a strip floating device 21 capable of floating and supporting the strip 2 by the fluid film 20 is configured. Further, the deviation between the strip position detection signal 23 from the strip position detection device 22 provided on the run-out table 4 and the strip position setting signal 25 set on the setting device 24 is controlled to control the tilting device 11. An arithmetic control unit 28 is provided for sending a strip position adjustment command 27 to a hydraulic control unit 26 such as a servo valve. In the drawing, reference numeral 29 denotes a shaft box which rotatably supports both ends of the roll 12 constituting the pinch roll device 13 for adjusting the strip position. Next, the operation will be described. The fluid supply source 14 is driven for the strip 2 that has traveled on the transport line and has been discharged from the strip position adjusting pinch roll device 13, and the fluid 15 is supplied to the fluid supply path 16 and the flow rate adjusting valve 17. Through the fluid chamber 18
From the fluid chamber 18 to the run-out table 4
Are ejected to the lower surface of the strip 2 through a number of nozzles 19 provided at positions between the table rollers 3 to form a fluid film 20 between the run-out table 4 and the strip 2. Since the strip 2 is levitated and supported by the pressure of the fluid film 20, the frictional resistance acting on the strip 2 is significantly reduced in both the line direction 10 and the width direction 34. Therefore, the strip 2 is fed by the strip position adjusting pinch roll device 13. And transportation is stabilized. When adjusting the position of the strip 2 in the width direction 34, the position of the strip 2 is set in the setting unit 24. The arithmetic and control unit 28 receives the strip position setting signal 25 from the setting unit 24 and the strip position detection signal 23 from the strip position detecting unit 22 provided in the run-out table 4 and calculates the deviation between them. Until the deviation disappears, a strip position adjustment command 27 is sent to the hydraulic control device 26 of the tilting device 11, and the tilting device 1
The amount of protrusion of one in the line direction 10 is adjusted. Thus, the line direction 10 of the roll 12 constituting the pinch roll device 13 for adjusting the strip position is adjusted.
Is changed, for example, as shown by the two-dot chain line in FIG. 2, the position of the strip 2 in the width direction 34 is changed to the position shown by the two-dot chain line, and adjusted according to the strip position setting signal 25. At this time, since the strip 2 is levitated and supported by the fluid film 20, the strip 2 and the fluid film 20
Is less than 0.001, so that the position can be freely adjusted without damaging the strip 2. In this embodiment, since the strip 2 is levitated by the ejection pressure (positive pressure) of the fluid 15 such as air or water, the feed amount of the fluid 15 can be reduced. FIGS. 3 and 4 show a second embodiment of the present invention, which has a required gap 30 with respect to the upper surface of the run-out table 4 provided on the exit side of the pinch roll device 13 for adjusting the strip position. A strip-shaped floating device main body 31 extending in the line direction 10 is provided, a strip guide surface 32 is formed on the lower surface of the strip floating device main body 31, and a gas chamber 33 is formed above the strip floating device main body 31. And the width direction 3 of the strip levitation device main body 31.
4 extends in the line direction 10 to the center position, and is inclined toward both width ends of the strip 2 so that the strip guide surface 32
A pair of slit-shaped nozzles 36 for forming a high-speed gas flow 35 such as air or nitrogen gas between the strip 2 and the strip 2 is formed as a strip floating device 21. In this embodiment, a required flow rate of the fluid 15 is supplied from the fluid supply source 14 to the gas chamber 33 through the fluid supply passage 16, and the fluid 15 is supplied from a slit-shaped nozzle 36 formed in the strip levitation apparatus main body 31. A fluid 15 such as air is ejected toward the strip guide surface 32. Then, since the nozzles 36 are inclined toward both width ends of the strip 2, the strip guide surface 3
A high velocity gas flow 35 is formed along the lower surface of 2. With the high-speed gas flow 35, the pressure on the upper surface side of the strip 2 becomes lower than the pressure of the stationary outside air on the lower surface side of the strip 2 according to Bernoulli's principle.
Due to the pressure difference between the two, the strip 2 becomes the strip guide surface 3
It is sucked into 2. When the strip 2 is sucked and approaches the strip guide surface 32 to some extent, the distance between the strip and the strip guide surface 32 becomes narrower, the fluid resistance of the high-speed gas flow 35 increases, and the pressure of the fluid 15 between them increases. The suction force is weakened by that amount, and the strip 2 is held floating on the strip guide surface 32 at a position where the suction force and the own weight of the strip 2 are balanced. Here, the strip guide surface 32 functions to determine the position of the strip 2 to be sucked and held, and to actively form a portion into which external air cannot enter, thereby improving the suction holding efficiency by the high-speed gas flow 35. It has the function of improving the required suction holding area. It should be noted that the strip guide surface 32 is
The high-speed gas flow 35 may be injected in a direction other than the width direction 34. Also, in this embodiment, unlike the previous embodiment, the strip 2 is levitated by utilizing the negative pressure generated by the high-speed gas flow 35, so that a large amount of fluid 15 is required. Other than the above, the configuration is the same as that of the above embodiment, and the same operation and effect can be obtained. FIG. 5 shows a third embodiment of the present invention, in which the roll 12 of the pinch roll device 13 for adjusting the strip position is used.
Tilting device 1 such as a cylinder that can expand and contract in the width direction 34
1 is connected and the position of the strip 2 is adjusted by moving the roll 12 in the width direction 34. be able to. It should be noted that the present invention is not limited to the above-described embodiment, and it goes without saying that various changes can be made without departing from the spirit of the present invention. As described above, according to the strip position adjusting apparatus of the present invention, an excellent effect that the position can be freely adjusted without damaging the strip can be obtained.

[Brief description of the drawings] FIG. 1 is a schematic side view of a first embodiment of the present invention. FIG. 2 is a schematic plan view of FIG. FIG. 3 is a schematic side view of a second embodiment of the present invention. FIG. 4 is a schematic front view of FIG. 3; FIG. 5 is a schematic plan view of a third embodiment of the present invention. FIG. 6 is a schematic side view of a hot rolling line. FIG. 7 is a schematic plan view of a conventional example. [Explanation of symbols] 2 strips 10 line direction 12 rolls 13 Pinch roll device for strip position adjustment 19, 36 nozzles 20 fluid membrane 21 Strip floating device 34 width direction (perpendicular to line direction 10) 35 High-speed gas flow

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiroshi Takayo 1 Shin-Nakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Prefecture Ishikawajima-Harima Heavy Industries Co., Ltd.Yokohama Second Factory (72) Inventor Masao Nitanda New Isogo-ku, Yokohama-shi, Kanagawa No. 1, Nakahara-cho, Ishikawajima-Harima Heavy Industries, Ltd.Yokohama No. 2 Factory (72) Inventor Nobuhiro Ito No. 1, Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Kawasaki Steel Corporation Chiba Works (72) Inventor Toshio Imaseki, Chiba-shi, Chiba 1 Kawasaki-cho, Ward Kawasaki Steel Corporation Chiba Works (72) Inventor Toshisada Takechi 1 Kawasaki-cho, Chuo-ku, Chiba City, Chiba Prefecture Kawasaki Steel Corporation Chiba Works (56) References JP-Sho 57-12777 (JP) , B2) (58) Field surveyed (Int. Cl. ⁷ , DB name) B21B 39/18 B21B 39/12 B21B 39/14

Claims (1)

(57) moves to the Claims 1. A strip width direction, or strike
A pinch roll device for strip position adjustment with a roll tiltable in the line direction with respect to the lip width direction is provided,
A strip position adjusting device, comprising a strip floating device provided with a nozzle capable of generating a fluid film for floatingly supporting the strip on an output side of the strip position adjusting pinch roll device.