JPH06279868A - Fluid floating-up conveying device - Google Patents

Abstract

PURPOSE:To convey a steel strip or a steel sheet while floating up in a high efficiency by effectively using the air for floating-up to the max. limit without using a complicated electrical control device, etc., in the floating-up conveying device for steel strip or steel sheet. CONSTITUTION:In the device for conveying the steel strip or the steel sheet 1 while floating up with fluid, plural rubber pads 4 are arranged in the advancing direction of the sheet and in the width direction of the sheet and a flapper 10 is arranged at each air flowing inlet 9 of a part or all of the pads 4 and a rigid body 11 is arranged at the supporting part of the flapper. By this method, without using the complicated electrical control device, etc., the air supplying quantity for floating-up can automatically be optimized according to the passed sheet width and position, and gas energy for floating-up can be saved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for floating and conveying a steel strip or a steel plate with a fluid.

[0002]

2. Description of the Related Art In recent years, in steel strip or steel sheet conveying equipment, it has been attempted to convey the material in a non-contact manner in order to avoid a roll contact flaw caused by using a roll, but a large amount of fluid such as air is consumed. Therefore, it is necessary to provide a transportation facility that uses the minimum necessary amount of air according to the width of the steel strip or the steel plate. For example, in Japanese Unexamined Patent Publication No. 2-166236, a floater that supports a steel strip in a non-contact manner is composed of a chamber having a large number of nozzles and a pair of side plates that are movable in the plate width direction on a nozzle formation surface. By moving the distance between the side plates according to the plate width, it has been attempted to use the minimum necessary air amount when the plate widths of the steel strips are different.

[0003]

However, the above method requires a device for moving the side plate in accordance with the strip width of the steel strip, and generally, information on the strip dimension and strip width sensor in the operation management system are required. It requires a complicated electric control device that calculates the side plate movement amount based on the signal and issues a command to the side plate drive device based on the calculation result, which not only causes an increase in equipment cost but also equipment reliability. In addition, there is a risk of deterioration of the property, and in addition, in order to avoid a contact accident between the steel strip and the side plate, it is necessary to move the side plate with a margin for the actual strip width variation. There is a problem that the side plates are opened in the initial stage and the final stage of conveyance, and unnecessary air is consumed. When a cut plate-shaped steel plate is levitationally transported by the above method, the chamber is divided in the plate traveling direction,
A device for controlling the amount of air to the chamber is also required depending on the position of the steel sheet in the traveling direction, resulting in an increase in equipment cost.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above problems, makes the most effective use of levitation air without using a complicated electric control device, etc., and efficiently floats steel strips and steel sheets. The purpose of this is to convey a steel strip or steel plate with a fluid and to convey it in a device, in which a plurality of rubber pads are provided in the plate advancing direction and the plate width direction, and the air flow of some or all of the rubber pads. A fluid levitation type conveying device is characterized in that a flapper is provided at an inlet and a rigid body is arranged at a support portion of the flapper.

The present invention will be described in detail below with reference to the drawings. FIG. 1 is a perspective view of a steel strip levitation type conveyance device including a rubber pad according to the present invention. As shown in FIG. 1, the levitation type conveying device 2 including a plurality of rubber pads installed in the plate advancing direction and the plate width direction can selectively use the levitation of the steel strip 1 according to the change of the wide and narrow steel strips 1. Is configured as follows. That is, in the case of a narrow steel strip, the rubber pad 3 without the flapper, and in the case of a wide steel strip, the rubber pad 3 without the flapper and the rubber pad 4 with the flapper.
Both are configured to operate freely.

FIG. 2 is a perspective view of a levitation type conveying device for changing the direction of a steel strip formed of a rubber pad according to the present invention. As shown in FIG. 2, the direction-changing levitation-type conveying device 5 composed of a plurality of rubber pads installed in the plate advancing direction and the plate width direction selectively uses the levitation of the steel strip 1 according to the change of the wide and narrow steel strips 1. It is configured to be able to. That is, in the case of a narrow steel strip, the rubber pad 3 without a flapper and in the case of a wide steel strip both the rubber pad 3 without a flapper and the rubber pad 4 with a flapper are configured to operate freely.

FIG. 3 is a perspective view of a levitation type conveying device for a cut plate-shaped steel plate comprising a rubber pad according to the present invention. As shown in FIG. 3, the levitation type conveyance device 7 composed of a plurality of rubber pads installed in the plate traveling direction and the plate width direction can selectively use the levitation of the steel plate 6 depending on the position of the steel plate 6 in the traveling direction and the plate width direction. Is configured as follows. That is, the rubber pad 4 with the flapper is configured to freely operate according to the position of the steel plate in the traveling direction and the plate width direction.

FIG. 4 is a sectional view of the rubber pad according to the present invention. As shown in FIG. 4, a flapper 10 is provided in the air supply port 9 of the cylindrical body 8 below the rubber pad 4, and the flapper 1
The flapper 10 is automatically attached to one end of 0 by the rigid body 11 of the flapper supporting portion, and when the steel strip 1 or the steel plate 6 is not present, the flapper 10 is automatically closed by the air supply pressure and the air supply port 9 is closed to cause almost air leakage. I try not to. Further, when the steel strip 1 and the steel plate 6 are present, a slight pressure difference is applied to the inlet / outlet of the air supply port, so that the flapper 10 has a slight pressure difference between the inlet and outlet of the air supply port due to the rigidity of the elastic body 11 supporting the flapper 10. The steel strip 1 or the steel plate 6 is levitated.

However, when the steel strip 1 and the steel plate 6 originally on the rubber pad 4 are lost due to their movement, the flapper 10 in the open state is pressed against the air supply port 9 by the pressure of air and automatically. In order to shift to the closed state, it is important to set the angle between the flapper 10 and the opening surface of the air supply port 9 in the opened state to 90 degrees or less. In addition, when the steel strip 1 or the steel plate 6 that was not initially on the rubber pad 4 comes on the rubber pad 4 due to their movement, the flapper 10 that was in the closed state is automatically closed. Flapper 10 and air supply port 9 in the state
It is important that a slight gap be provided in the rubber pad 4 so that the air slightly flows into the rubber pad 4. Due to this slight gap, when the steel strip 1 or the steel plate 6 comes on the rubber pad 4, the pressure inside the rubber pad 4 rises due to the inflowing air, the pressure difference between the air supply port and the air supply port almost disappears, and the flapper 10 is opened. Migrate automatically.

According to the research conducted by the inventors, the opening area due to this slight gap is about 1/100 to 1/100 of the opening area of the air supply port 9 when the flapper 10 is fully opened.
0 is sufficient, and the flapper 10 is provided on the opening surface of the air supply port 9.
The unevenness may be provided so that the opening area when fully closed is about 1/100 to 1/1000. The same effect can be achieved by placing a small hole in the flapper 10 instead of providing the unevenness. As a result, the amount of air leakage when the flapper 10 is fully closed is 1% or less and can be almost ignored. Further, it is desirable to use a spring or the like as the elastic body.

That is, when the steel strip or steel plate is not floated, the internal pressure of the rubber pad 4 is substantially equal to the external air pressure, and there is a pressure difference between the air supply pressure and the external air pressure when the rubber pad enters and leaves the air supply port. On the other hand, when the steel strip or steel plate is levitated, the air entering the rubber pad flows out into the outside air through the narrow gap between the steel strip or steel plate, causing a large pressure difference in the gap, and the rubber pad The internal pressure is much higher than the external pressure and is close to the air supply pressure. Therefore, a flapper is provided at the air supply port inlet / outlet of the rubber pad, the flapper is closed when there is a pressure difference between the air supply pressure and the outside air pressure at the air supply port inlet / outlet, and the rubber pad internal pressure is close to the air supply pressure.
By appropriately setting the elastic force of the flapper supporting portion so that the flapper opens when the pressure difference is not so large, the flapper is automatically opened and closed depending on the presence or absence of the steel strip or the steel plate.

As described above, conventionally, when a steel strip or a steel plate is directly levitated, it is necessary to take measures against air leakage from the levitation type carrier whenever the plate width or the position in the traveling direction changes. There is no need, and even if the strip width of the steel strip is constantly changed or the position of the steel sheet in the traveling direction changes, no countermeasure is required.

[0013]

As described above, by carrying out the present invention, it is possible to automatically levitate according to the plate width and the position of the plate passed by a simple device without using a complicated electric control device or the like. The air supply amount can be optimized, and many excellent effects such as reduction of the levitation gas energy can be achieved.

[Brief description of drawings]

FIG. 1 is a perspective view of a levitation type conveying device for steel strips including a rubber pad according to the present invention,

FIG. 2 is a perspective view of a levitation-type conveying device for changing the direction of a steel strip formed of a rubber pad according to the present invention,

FIG. 3 is a perspective view of a levitation-type conveying device for a cut plate-shaped steel plate including a rubber pad according to the present invention,

FIG. 4 is a sectional view of a rubber pad according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Steel strip 2 Floating carrier device for steel strip 3 Rubber pad without flapper 4 Rubber pad with flapper 5 Floating carrier device for changing direction of steel strip 6 Steel plate 7 Floating carrier device for steel plate 8 Cylindrical body 9 Air supply port 10 Flapper 11 Flapper Hinge elastic

Claims (1)

[Claims] 1. A device for floating and transporting a steel strip or a steel plate with a fluid, wherein a plurality of rubber pads are provided in a plate advancing direction and a plate width direction, and a flapper is provided at an air inlet of a part or all of the rubber pads. A fluid levitation type transport device, characterized in that a rigid body is disposed on the support portion of the.