JPS63225058A - Stable floating passing plate device for band-shaped article - Google Patents

Abstract

PURPOSE:To improve the floating passing performance on plate by installing weir-shaped side guides at the edge parts in the direction of width on a fluid supporting pad surface having a fluid blow-out port and eliminating the deflection from the center part of a band-shaped article. CONSTITUTION:Weirs 3 are installed at the both edges in the direction of width of a pad 2 for fluid floating-up having a fluid blow-out port. A band-shaped article 1 which passes in floating-up on a pad 3 by the blow-out of the fluid is deflected from the center part and set to the R side of the weir 3, the interval between the band-shaped article 1 and a side guide wall 3 reduces, and almost all the fluid supplied from the fluid blow-out port is allowed to flow from the R side to the L side on the undersurface of the band-shaped article 1. Therefore, the deflection from the center part in the direction of width of the band-shaped article 1 is automatically corrected, and the article 1 is allowed to pass always in stable state on the plate at the center part, and the on-plate passing performance can be improved.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a device for floating and conveying a running belt-shaped object such as a metal strip or foil, and in particular, it relates to a device for levitating and conveying a running belt-like object such as a metal strip or foil, and in particular, the invention relates to a device for levitating and conveying a running belt-like object such as a metal strip or foil, and in particular, the invention relates to a device that levitates and conveys a running belt-like object such as a metal strip or foil. It is applied to fields where surface finishing accuracy is required, or where the belt-like material is required to be conveyed without contacting the conveyor rolls, such as when heat-treating the belt-like object.

(Prior art) Examples of the prior art regarding a floating plate passing device for a strip-like material include Japanese Patent Publication No. 43-28961 and Utility Model Application Publication No. 55-633.
There is 38 mag. In these conventional techniques, gas is ejected from the slit or hole to support the strip by floating, but since it does not have a means to control the threading of the strip, the stability of threading is difficult to achieve when applied industrially. It cannot be said that it is sufficient from the point of view of
The band-like material passing over the fluid pad (hereinafter simply referred to as pad) tends to come off to both sides. That is, due to conditions such as poor shape of the strip, non-uniform tension, and running conditions of the front and rear rolls, the strip may easily deviate from the center in the width direction of the pad.
In some cases, it becomes impossible to pass the board.

(Problems to be Solved by the Invention) Problems when applying the prior art will be explained with reference to the drawings. FIG. 5 shows an example of a case where a strip-like object is supported by a conventional non-contact flotation device having a curved surface. The problem with the conventional floating conveyance of a strip is that, as shown in FIG. If the external conditions change while the belt is sliding without the belt, the belt tends to move off to the left or right from the center in the width direction, making it impossible to transport the belt.

An object of the present invention is to solve the problem of such a belt-shaped object coming off the pad and becoming unable to be conveyed, and to provide a floating plate threading device that can stably carry out floating plate threading.

(Means for Solving the Problems) In order to achieve the above object, the present invention corrects the deviation in the width direction of the strip that occurs due to changes in external conditions, and stabilizes the strip at the center of the pad. A feature of the present invention is that weir-like side guide walls are provided at both ends in the width direction of the fluid support pad surface having a gas outlet so that the plate can be threaded through the plate.

The present invention will be explained below with reference to the drawings.

As an example of a desirable embodiment of the present invention, FIG. 1 shows a fluid flotation pad 2 having a fluid outlet 4 at both ends in the width direction.
An example is shown in which a side guide wall 3 is arranged as a weir so that the strip passing position can be corrected to the center even if the strip 1 deviates from the center of the pad toward both ends. By arranging the side guide wall 3 as a weir in this way, even if the strip is deviated from the center in the width direction due to external changes, it is possible to quickly and automatically correct the deviation.

(Function) FIG. 2 is a cross-sectional view taken along the line AB in FIG. 1. In FIG. 2, when the strip 1 is biased towards the R side and is close enough to contact the R side side guide wall 3, the floating fluid of the strip 1 is distributed between the R side end of the strip and the R side side guide wall 3. wall 3
As the distance between the two becomes narrower, it becomes difficult to flow. Therefore, most of the fluid ejected from the fluid outlet 4 of the pad 2 is transferred to the strip 1.
Since the fluid flows from the R side to the L side on the lower surface of the fluid, the strip 1 is automatically transported to the L side and returned to the center due to the viscosity of the fluid.

Even if the strip 1 is shifted toward the L side, it is returned to the R side by the same action, and the stretching position of the strip 1 is automatically corrected to the center in the width direction of the pad 2.

As another example of the present invention, FIG. 4 shows an example in which side guide walls 3 are provided at both ends of the fluid pad in the width direction as weirs, the tops of which are higher toward the ends. By providing a side guide with such a shape, for example, if the strip 1 is biased toward the R side, the strip 1 will ride along the slope of the side guide on the L side, and the effect of gravity as well as the above-mentioned effect will be reduced. With this addition, centering to the L side becomes even stronger.

In addition to the above-mentioned examples, any side guide can be used as the weir in the present invention as long as it has a wall surface that can dam the fluid that is ejected from the pad surface and flows out toward the end of the strip.

(Example) Figure 3 shows an annealing line for a strip, and the weir 3 shown in Figure 1 was installed on both sides of the pad used in the heat treatment section (consisting of a heating furnace 5 and a cooling furnace 6). Give an example. The strip is made of stainless steel foil and the size is thickness x width = 50μm x
0.4 m, line tension 4 kg.

Pad radius is R=250mm, air volume is 15 Nm'/m
in, and non-contact threading was carried out at a discharge pressure of 120111111H20. The use of side guide walls allows the strip to be stabilized in the center in the width direction, significantly improving threading stability.

(Effects of the Invention) By using the device of the present invention, the strip-like object no longer deviates from the center in the width direction, so that stable floating and sheet-passing properties were significantly improved. Therefore, it has become possible to put into practical use non-contact floating sheet threading technology that does not rely on rolls. Furthermore, by implementing the present invention, the strip does not come into contact with the conveying device, reducing the number of defective products caused by contact paper, and eliminating surface flaws caused by contact during surface treatment of heat-treated steel plates, plated steel plates, painted steel plates, etc. was completed.

[Brief Description of the Drawings] Fig. 1 is a perspective view showing a specific example of the device of the present invention, Fig. 2 is a sectional view taken along line A-B in Fig. 1 for explaining the present invention in detail, and Fig. The figure shows an embodiment of the apparatus of the present invention applied to an annealing facility, and FIG. 4 shows another example of the present invention. FIG. 5 is a perspective view of a conventional device. DESCRIPTION OF SYMBOLS 1... Band-shaped object, 2... Static pressure support pad, 3... Side guide, 4... Fluid outlet, 5... Heating furnace, 6
...Cooling furnace.

Claims (2)

[Claims] (1) A device for transporting a traveling strip while supporting it in a non-contact manner, characterized in that weir-like side guides are provided at both ends in the width direction of a fluid support pad surface having a fluid outlet. Floating plate threading device. (2) The device according to claim 1, wherein the side guide is formed in such a shape that the top of the side guide becomes higher toward the end at the widthwise end of the fluid pad.