JP2655785B2 - Non-contact transport device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art The non-contact conveyance of a belt-like material has the advantage that the conveyed object does not come into contact with the support roll as compared with the conveyance means using a support roll, so that surface defects are not generated on the conveyed object. is there. In this non-contact transfer device, a fluid pressurized by a blower or the like is ejected from a slit-shaped nozzle provided on the static pressure pad toward the band, and the band is formed by the pressure generated by the air between the static pressure pad and the band. It is intended to levitate an object, for example, Japanese Patent Application Laid-Open No. 62-63623.
In applying the non-contact transfer device in which a plurality of static pressure pads provided with two slit nozzles in the width direction of the strip to be passed to a continuous annealing furnace, a heating device is provided between each static pressure pad. There is disclosed an apparatus in which 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 floating, for example, when the thickness of a conveyed band-like material is large or the weight per unit area of the conveyed material is large. The pressurized blower capacity has become enormous, which has made application to heavy objects virtually impossible.

An object of the present invention is to provide a non-contact transfer device capable of stably transferring even a heavy belt-like material such as a relatively thick steel strip.

[0005]

SUMMARY OF THE INVENTION A non-contact transfer device according to the present invention is a fluid cushion type non-contact transfer device for use in a continuous processing device for a strip, wherein the non-contact transfer device is provided on both sides of a side edge of the transfer strip. And a casing-like header for introducing a leakage fluid around the upper part , and both ends of the header
An opening is provided in the side wall .

[0006] The header can follow the width change of the band-shaped material and can be moved in the width direction.

[0007]

The fluid leaking from the gap between the strip and the static pressure pad is introduced into the header to impart fluid resistance to the ejection path of the leaked fluid and reduce the amount of leaked fluid, thereby generating a static pressure. Efficiency improves.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the non-contact transfer device of the present invention is applied to transfer of a steel strip is described.

In FIG. 1, reference numeral 1 denotes a hydrostatic pad for generating a plurality of floating gas cushions arranged in the direction of transport of the transport strip S indicated by an arrow. This static pressure pad 1 has
The slit-shaped nozzles 2 are arranged along both side edges of the strip S to be conveyed by levitation. Reference numeral 3 denotes a header which is slightly outside and slightly above the end edge of the strip S to be conveyed, and includes a blocking wall 31 along the upper edge of the hydrostatic pad 1 and the end of the strip S to be conveyed. The cross-section covering the outside of the rim comprises a circular casing portion 32. As shown in FIG. 2 which is a cross-sectional view of the header 3 taken along the transport direction of the transport strip S, openings 4 for discharging a pressurized gas are provided on the front and rear surfaces of the header 3. .

The arrangement interval of the header 3 can be adjusted according to the width of the strip S to be conveyed, so that the header 3 can correspond to the width of the strip S to be conveyed.

In the non-contact transfer device having such a structure, gas A pressurized by a blower or the like (not shown) is introduced into the static pressure pad 1 from the lower inlet port 5, and the gas A is applied to both ends on the static pressure pad 1. It is jetted from the arranged slit-shaped nozzle 2 toward the lower surface of the steel strip S. As indicated 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 side edges from the side to the upper side. The gas flowing into the header 3 generates an internal pressure in the header 3 and then blows out from the openings 4 at both ends of the header 3.

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

[0013] A header 3 is provided to collect once 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 leakage amount as a whole can be reduced by the pressure resistance when the fluid passes through the openings 4.

[0014]

According to the present invention, the following effects can be obtained.

(1) The amount of escape of the cushion-forming fluid ejected from the static pressure pad from the side edge of the transport strip can be extremely reduced. Therefore, when the present invention is applied to transport of a steel plate, the capacity of the pressurizing blower is increased. And the transport of the weight plate becomes possible.

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

(3) As 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 in the width direction of the strip.

[Brief description of the drawings]

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

FIG. 2 is a cross-sectional view of the header section of the non-contact transport device shown in FIG. 1 cut along the transport direction of the transport strip.

[Explanation of symbols]

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

Claims (1)

(57) [Claims] 1. A fluid cushion type non-contact transfer device for use in a continuous processing device for a belt- like material, wherein a casing for introducing a leaked fluid into the periphery from both sides of the transport belt to the upper side thereof. Provide a header and
Non-contact transfer device with openings on both side walls