JPH0610064A - Non-contact conveying device - Google Patents

Abstract

PURPOSE:To apply a non-contact conveying device to continuous heat treatment or the like for a hoop in which stable conveying is enabled even in the case of a heavy band-shaped material such as a relatively thick hoop. CONSTITUTION:In the fluid cushion type non-contact conveying device used in a continuous treating device for a band-shaped material, both edges of the band-shaped material to be conveyed are provided with a header 3 introducing the leaked fluid to the circumference from the side direction to the upper direction. By introducing the fluid leaked from the space between the band-shaped material and a static pressure pad 1 into the header 3, the amt. of the fluid to be leaked is reduced, and the static pressure generating efficiency is improved. This header 3 is also allowed to follow up the breadwise change in the band-shaped material and move in the breadwise direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-contact transfer in which a strip is floated by a fluid cushion such as air, as in the case of continuous heat treatment of steel strip.

[0002]

2. Description of the Related Art The non-contact conveyance of such a belt-like material has an advantage that a conveyed object does not come into contact with the support roll and therefore a surface flaw is not generated on the conveyed object, as compared with a conveying means using a supporting roll. is there. This non-contact transfer device ejects fluid whose pressure has been increased by a blower, etc., toward a strip from a slit-shaped nozzle provided on the static pressure pad, and the pressure generated by the air between the static pressure pad and the strip causes the strip to move. It floats an object, and is disclosed in, for example, JP-A-62-63623.
In applying a non-contact transfer device having a plurality of static pressure pads provided with two slit nozzles in the width direction of a strip to be threaded to a continuous annealing furnace, a heating device is provided between the static pressure pads. It is disclosed that a space for installation is provided to shorten the furnace length.

[0003]

However, such a non-contact transfer device using a fluid cushion is required for levitation, for example, when the plate thickness of the belt to be transferred is increased or the weight per unit area of the transferred object is increased. Since the capacity of the pressurized blower becomes enormous, it is practically impossible to apply it to heavy objects.

An object of the present invention is to provide a non-contact transfer device which can stably transfer even a heavy strip such as a relatively thick strip.

[0005]

SUMMARY OF THE INVENTION The non-contact carrier of the present invention is a fluid cushion type belt non-contact carrier for use in a continuous processing apparatus for belts. It is characterized in that a header for introducing the leakage fluid is provided around the area from the top to the top.

The header can follow the width change of the strip and be movable in the width direction.

[0007]

[Function] By introducing the fluid leaking from the gap between the strip and the static pressure pad into the header, a fluid resistance is given to the jetting path of the leaking fluid, and the leaking fluid amount can be reduced, so that the static pressure is generated. Efficiency is improved.

[0008]

EXAMPLE An example in which the non-contact transfer device of the present invention is applied to transfer of steel strip will be described.

In FIG. 1, reference numeral 1 denotes a static pressure pad for generating a plurality of floating gas cushions arranged in the transport direction of the transport strip steel S indicated by the arrow. In this static pressure pad 1,
The slit-shaped nozzles 2 are arranged along both edge portions of the strip steel S that is floated and conveyed. Reference numeral 3 denotes a header opened slightly outside and slightly upward of the edge of the strip S to be transported, and the blocking wall 31 along the upper edge of the static pressure pad 1 and the edge of the strip S to be transported. The casing 32 has a circular cross section that covers the outside of the edge. Then, as shown in FIG. 2, which is a cross-sectional view of the header 3 taken along the transport direction of the transport steel strip S, openings 4 are provided in the front and rear surfaces of the header 3 for discharging the pressurized gas. .

The header 3 is arranged such that its arrangement interval can be adjusted in accordance with the width of the steel strip S to be conveyed, whereby the width of the steel strip S to be conveyed can be adjusted.

In the non-contact transfer apparatus having such a structure, the gas A whose pressure is increased by a blower (not shown) is introduced into the static pressure pad 1 through the lower inlet port 5, and the static pressure pad 1 is provided at both end portions. It is jetted from the slit-shaped nozzle 2 arranged toward the lower surface of the steel strip S. As shown by the arrow
The gas flowing in the width direction of the steel strip S and leaking from both side edges flows into the header 3 arranged around the both side edges from the upper side to the upper side. The gas flowing into the header 3 generates internal pressure in the header 3 and then is ejected from the openings 4 at both ends of the header 3.

The smaller the area of the opening 4, the greater the static pressure generation efficiency. However, if the area is extremely small, the flow at the edge of the strip S is disturbed and the stability in the width direction of the strip S is deteriorated. It is necessary to choose a large area.

The header 3 is provided to once collect the leaked gas,
Since the fluid is finally discharged to the external pressure region by the openings 4 at both ends of the header 3, the amount of leakage as a whole can be reduced by the pressure resistance when the fluid passes through the opening 4.

[0014]

The present invention has the following effects.

(1) Since the escape amount of the cushion-forming fluid ejected from the static pressure pad from the side edge of the conveyor belt can be extremely reduced, the capacity of the booster blower should be increased when applied to the conveyance of steel sheets. Instead, the weight plate can be transported.

(2) By improving the floating efficiency, the capacity of the conventional blower equipment can be reduced, and the equipment cost can be reduced.

(3) Compared with the case where the present invention is not applied,
The gas flow at the end of the strip has little turbulence, and therefore contributes to stabilization of the width of the strip.

[Brief description of drawings]

FIG. 1 shows an embodiment in which the non-contact transfer device of the present invention is applied to the transfer of strip steel.

FIG. 2 is a cross-sectional view of the header portion of the non-contact carrier device shown in FIG. 1, taken along the carrier direction of a carrier steel strip.

[Explanation of symbols]

 1: Static pressure pad 2: Slit nozzle 3: Header 31: Header blocking wall 32: Casing 4: Opening at both ends of header 5: Pressurized gas inlet

Claims (1)

[Claims] 1. A fluid-cushion-type non-contact belt-shaped conveying device used in a continuous treatment device for strips, wherein a header for introducing a leaking fluid to the periphery of both side edges of the conveying strip from the side to the top is provided. Non-contact transfer device provided.