JPS617161A - Floating/supporting device for stripe member - Google Patents

Abstract

PURPOSE:To float a stripe member stably by forming air-curtains positioned at the opposite sides of a stripe member with barrier wall arranged near the opposite side sections of the stripe member thereby stabilizing the air-flow at the opposite sides of pressure chamber formed below the stripe member. CONSTITUTION:An injection nozzle 2 made of a pair of slits directing inwardly each other in the lateral direction of a stripe member W, a central injection nozzle 3 made of a slit arranged to partition said nozzle 2 and a solid state barrier wall 4 made of steel plate and arranged with predetermined gap against the edge section of said member W are provided on the upper face of a nozzle box 1. Pressure chambers A, B are formed by the ejection flow through said nozzles 2, 3 and the ejection flow through the gap between the edge section of said member W and the barrier wall 4 to float the stripe member W. Here, the gas from the pressure chambers A, B is limited by the barrier wall 4 to form stable air-curtains at the opposite edge sections of the stripe member W with the gas ejected through the gap between the barrier wall 4 and the stripe member W.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a floating support device for a strip material, particularly a thin strip material, for conveying the strip material in a non-contact manner.

(Prior Art) A sheet body support device that conveys a strip material without contact and restores it to its normal state even if the strip material is tilted or skids in the left and right direction is disclosed in, for example, JP-A-55-11I.
This is proposed in Publication No. 344.

This sheet body support device has a nozzle box with a rectangular ejection groove and a central ejection groove to form a Japanese-shaped nozzle, and in addition to ejecting high-pressure gas from these seven holes, it also ejects high-pressure gas from a pair of left and right ejection grooves. By locating the cutting part of the strip 4 in the ejected airflow and forming two pressure chambers on the left and right below the conveyed strip, the two pressure chambers will normally float and support the strip. When the strip material tilts or slides sideways, the pressure difference between the two pressure chambers causes the strip material to return to a predetermined position.

(Problem to be Solved by the Invention) However, in the support device, all the pressure chambers are formed by air curtains made of ejected gas, and in particular, it is necessary to keep the air curtains on both sides of the strip material stable at all times. This poses a problem in that stable support and sufficient restoring force of the strip material cannot be obtained.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention forms an air curtain located on the side of the strip material by a barrier wall located near the side of the strip material, This stabilizes the airflow on both sides of both pressure chambers.

(Embodiment) FIGS. 1 to 3 show a first embodiment of the flotation support device for a strip material according to the present invention, and 1 is a nozzle box of the flotation support device provided below the conveyance path for the strip material W. On the upper surface of this nozzle box 1, there is a jet nozzle 2.2 formed of a pair of slits facing inwardly in the width direction of the strip material W.
and, at the center of the jet nozzles 2, 2, both jet nozzles 2.
It has a central jet nozzle 3 consisting of a slit arranged to partition two spaces, and a solid partition wall 4 made of steel plate arranged with a predetermined gap from the edge of the belt-shaped material W to be conveyed. Then, the pressurized gas supplied from the mesuruheng (not shown) to the nozzle box 1 is ejected/thrown 2.2.3.
Make it squirt from.

In this case, the space formed by the lower surface of the strip W and the surface of the nozzle box 1 is divided by the gas ejected from the ejection nozzles 2 and 2 #- and the gas ejected from the central ejection nozzle 3, and Because both sides are divided by 4,4,
The gas in the space blows out from the gap between the edge of the strip material W and the barrier wall 4. In other words, the space is filled with jet gas from the jet nozzles 2, 2, jet gas from the central jet nozzle 3, and the strip material W. This is because the pressure chambers A and B are formed by the edge of the belt and the gas ejected from the gap between the barrier walls 4 and 4, and the strip material W is supported in a floating manner.

Furthermore, when the strip material W is tilted, the distance between the edge of the strip material W and both walls 4, 4 becomes unbalanced, and accordingly, a pressure difference occurs between the pressure chambers A and B, and this pressure Due to the difference, the strip material W is restored to its normal state.

The above-mentioned action is similar to that of the invention disclosed in Japanese Patent Application Laid-Open No. 55-111344.

However, in the present invention, the pressure chamber A.

Barriers 4, 4 are arranged on both sides of the pressure chamber A.
, B is regulated by the barrier walls 4, 4 on both sides, so that the gas ejected from between the barrier walls 4, 4 and the strip material W is stabilized at both edges of the strip material W. Form an air curtain.

Therefore, it is possible not only to stably support the strip material W, but also to effectively and stably ensure the restoring force when the strip material W is tilted or skids sideways.

FIG. 4 shows a second embodiment, in which the barrier wall 4 is formed of seven sul boxes, and a high-pressure gas ejection slit 5 having an air sealing function is provided on the opposite surface of the barrier wall 4, so that the ejected gas from the ejection slit 5 is is guided by the barrier wall 4 together with the gas from pressure chambers A and B, and is ejected from between the barrier wall 4 and the strip material W.

The pressure at B is maintained.

FIG. 5 shows a third embodiment, in which the ejection slit 5 is provided above.

FIG. 6 shows a fourth embodiment, in which the barrier wall 4 is of an airflow type, and a jet nozzle 5 is arranged above near the edge of the band-shaped interlayer, and the jet nozzle 5 is directed toward the surface of the nozzle honox 1. FIG. 7 shows the fifth embodiment.
The partition wall 4 is made movable, and jet ports 6, which are multi-hole nozzles, are provided between both sides of the jet nozzle 2.2. It allows the same effect to be performed. In addition, this eruption U-
] 61, you can also use a slit nozzle.

Also, in the 21st 3I 4th embodiment, the barrier wall 4
Of course, it is also possible to have a movable configuration.

In addition, FIG. 8 shows the moving mechanism of the barrier wall 4 in the $1 embodiment.
are stretched in a cross shape, and barrier walls 4, 4 are attached to this chain 8. However, the mechanism for moving the barrier wall 4 may be a mechanism, or of course may be carried out manually. It's good.

Furthermore, the central jet nozzle 3 may be a hole nozzle, and its arrangement may be in a cross shape (X-shape).

(Effects of the Invention) As is clear from the above explanation, according to the flotation support device for a strip material according to the present invention, the airflow for forming a pressure chamber flowing along both edges of the strip material is stabilized by the presence of the barrier wall. Become a thing,
Stable pressure chambers are formed on the left and right.

Therefore, the strip material is reliably supported in buoyancy, and
Even if it is tilted or shifted from side to side, it will be restored to its original position.

Furthermore, if the barrier wall is movable in the width direction of the strip material, it can be applied to strip materials of various widths.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the first embodiment of the present invention, FIG. 2 is a sectional view taken along line II-n in FIG. 1, and FIG.
4 and 5 are partial sectional views showing the second and third embodiments, FIG. 6 is a partial plan view showing the fourth embodiment, and FIG. 7 is a portion of the fifth embodiment. In a plan view, FIG. 8 is an explanatory diagram showing an example of a means for moving the barrier wall. 1...Nozzle Bonx, 2...Ejection nozzle, 3...
- Central spout nozzle, 4... barrier, W... strip material.

Claims (3)

[Claims] (1) A pair of front and rear jet nozzles provided in the width direction of the belt-shaped material to be conveyed, and a pair of left and right jet nozzles located near the outside of both edges of the belt-shaped material so that both sides of the jet nozzles end with each other. A flotation support device for a band-shaped material, which comprises a pressure chamber-forming barrier wall and a central jet nozzle located at the center in the width direction of the band-shaped material to divide the jet nozzles into left and right. (2) The floating support device for a strip material according to claim 1, wherein the barrier wall is movable in the width direction of the strip material. (3) The barrier wall is a solid barrier wall equipped with a nozzle box having a jet port that spouts gas at an angle between the inside and the top. Or the flotation support device for a strip material according to item 2.