JP3012392B2 - Horizontal fluid holding width variable pad of thin steel plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable-width fluid pressure pad for stably holding a thin steel sheet in a non-contact state when horizontally transporting the same.

[0002]

2. Description of the Related Art In the heat treatment of a thin steel sheet, for example, a stainless steel sheet, the sheet may be conveyed horizontally over a long section. In this horizontal transport section, since the surface properties are kept good, without using contact means such as rolls,
It is desirable to keep the steel sheet as non-contact as possible.

[0003] A hydrostatic pressure pad is conventionally known as a device for holding a steel sheet in such a non-contact state. As shown in FIG. 3, the pad opens slits (fluid ejection ports) 12 extending in the width direction of the steel sheet at both front and rear ends of the surface of the pad body 11 along the running direction of the steel sheet S.
A structure is employed in which a fluid is jetted obliquely upward from the pad toward the center of the pad body to generate a static pressure between the steel plate S and the upper surface of the pad (pressure receiving surface) to float and hold the steel plate.

However, in this type of pad, since a large amount of fluid flows out in the width direction of the steel sheet, it is difficult to maintain the static pressure uniformly in the width direction of the steel sheet. In a state where the steel plate and the pad surface are not parallel). To solve this drawback, for example, a technique disclosed in Japanese Patent Application Laid-Open No. 62-96621 has been proposed. As shown in FIG. 4, a floater structure in which a plurality of baffle plates 13 extending in the running direction of a steel plate are arranged on a pad body surface between a pair of slits 12 of the basic static pressure pad shown in FIG. Having.

[0005]

However, in the apparatus disclosed in Japanese Patent Application Laid-Open No. 62-96621, the flow of the fluid in the width direction of the plate is regulated by the action of the baffle plate, and the floating of the steel plate is certainly eliminated. Despite the benefits, new blower costs have arisen. In other words, according to Japanese Patent Application Laid-Open No. 62-96621, when the steel sheet meanders for some reason and the edge of the steel sheet exactly coincides with the position of the baffle plate, a negative pressure may be generated between the steel sheet and the floater. This may cause a one-sided floating state.

In the static pressure pad disclosed in Japanese Patent Application Laid-Open No. 62-96621, the length of the slit is longer than a predetermined maximum width of the steel sheet to be passed. As a result, the outflow of the fluid from this location was very large, which caused the blower power not to be reduced, resulting in an increase in blower cost.

The present invention solves the above-mentioned problems of the conventional horizontal holding means, enables the thin steel sheet to float and hold in a stable state without being affected by width variations, and suppresses the blower cost as low as possible. It is an object of the present invention to provide a thin steel plate fluid holding pad that can be used.

[0008]

The gist of the present invention for achieving this object is to provide a box-shaped pad main body which is arranged immediately below a horizontally running thin steel plate and connected to an appropriate fluid supply source. And a pair of fluid ejection ports formed in the width direction of the thin steel plate at the front and rear end positions of the pad body along the passing direction and ejecting fluid obliquely upward toward the center of the pad body. In the pad, opposing moving nozzle plates are installed on both sides in the steel sheet width direction between the fluid ejection ports, and at the tip of the nozzle plate, impact plates extending in the direction of the plate are integrally connected at intervals, and A horizontal fluid holding width variable pad made of a thin steel plate, characterized in that a fluid can be ejected from a gap between a nozzle plate and a pad body upper surface plate.

[0009]

According to the present invention, since the moving nozzle plate having the collision plate at the tip is disposed to face the width direction of the steel plate, the fluid flowing in the width direction of the steel plate is blocked by the collision plate and its outflow is suppressed. At the same time, the flow of the fluid ejected from between the nozzle plate and the collision plate makes the floating and holding of the steel plate more stable, and since this movable nozzle plate can be moved to the optimum position according to the width of the steel plate, it is always minimum. Therefore, the steel sheet can be floated with a small amount of blower power.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings. FIG. 1 is a perspective view showing an example of a fluid holding pad according to the present invention, and FIG. 2 is a sectional view taken along line AA of FIG.

As shown in FIG. 1, the pad according to the present invention is disposed immediately below a thin steel sheet S running horizontally, and has a box-shaped pad body 1 connected to an appropriate fluid supply source.
And a pair of fluid outlets (slits) 2 for ejecting a fluid obliquely upward toward the center of the pad body are formed in the width direction of the thin steel plate at both front and rear end positions of the pad body 1 along the passing direction. are doing. As shown in FIG. 1B, the pair of fluid outlets 2 is an outer plate 1A on the upper side wall of the pad body.
And a side edge of the upper surface (pressure receiving surface) 1B of the pad body. In the present invention, two opposing moving nozzle plates 3 are installed on both sides in the width direction of the steel sheet between the pair of fluid ejection ports 2, and a collision plate 4 extending in the passing direction is provided at the tip of the nozzle plate 3. They are integrally connected at intervals.

As shown in FIG. 2, the tip of the movable nozzle plate 3 has an angle extending toward the inside of the pad body, and a gap is provided between the bottom surface of the nozzle plate and the upper surface 1B of the pad body. This communicates with the slit 5 in the direction of the plate formed on the upper surface of the pad body, and serves as a fluid passage. Also,
A moving device 6 such as a cylinder is connected to a rear portion of each of the nozzle plates 3, and moves the nozzle plate 3 to an optimum position set in advance according to, for example, the width of the thin steel sheet S to be processed. It is supposed to. Although not shown, it is preferable to appropriately provide a guide means in order to smoothly slide the nozzle plate 3. The collision plate 4 attached at a distance from the nozzle plate 3 slides in contact with the pad upper surface 1B.

A plurality of the fluid pads of the present invention configured as described above are arranged at appropriate intervals, for example, along a threading line of the thin steel sheet S. In this case, the position of the nozzle plate 3 (impingement plate 4) is already processed. It is set at an optimum position according to the width of the target thin steel sheet S. The fluid ejected from the pair of fluid ejection ports 2 at the time of passing the plate is cut off to some extent by the collision plate 4 and is sealed, so that a large amount of fluid does not flow out in the width direction of the steel plate, and a suitable space between the steel plate and the pad is provided. The static pressure is maintained, and a stable passing state is obtained.

Further, the thin steel sheet S is stably floated and held by the fluid ejected from the slit 5 along the steel sheet longitudinal direction (passing direction) together with the fluid from the ejection port 2 along the steel sheet width direction. FIG. 2 (b) shows the fluid flow through the slit 5, and the fluid ejected from the slit 5 passes through the gap between the nozzle plate 3 and the pad upper surface 1B, hits the back surface of the collision plate 4, and turns upward. And is sprayed on the lower surface in the vicinity of the edge of the steel sheet S, which contributes to the stable floating of the steel sheet. Therefore, it is necessary to set the relationship between the nozzle plate 3 (collision plate 4) and the edge portion of the steel plate S in such a positional relationship that the above-described operation is reliably performed.

In addition, when each member and the thin steel plate are in an optimal positional relationship with each other, the steel plate can be floated and held in a stable state with the least blower power, which has a positive effect on the reduction of blower cost. When the width of the steel plate changes, the driving device 6 immediately changes the nozzle plate 3.
Then, the collision plate 4 may be moved to a predetermined position.

[0016]

As described above, the fluid pressure holding pad of the present invention can cope with variations in the sheet width and can be said to be the most suitable as a stable floating holding means for a thin steel sheet traveling in the horizontal direction. In addition, since it is possible to maintain the levitation by the fluid from both the width direction and the longitudinal direction of the steel sheet, excellent stability that cannot be obtained with the conventional hydrostatic pad is obtained, and the structure is simple and the blower power is minimized. Can be reduced to
It is advantageous in terms of cost and has a very high industrial effect.

[Brief description of the drawings]

FIG. 1A is an overall perspective view showing one embodiment of the present invention,
(B) is a partial sectional view of (a).

2A is a cross-sectional view taken along the line AA of FIG. 1 with an outer plate removed, and FIG. 2B is a partially enlarged cross-sectional view of FIG.

FIG. 3 is a plan view and a sectional view showing a basic configuration of a conventional fluid pressure pad.

FIG. 4 is a plan view and a sectional view of a conventional floater having a baffle plate.

[Explanation of symbols]

 S Thin steel plate 1 Pad body 1A Outer plate 1B Pad upper plate 2 Fluid ejection port 3 Moving nozzle plate 4 Impact plate 5 Passing plate direction slit 6 Drive unit

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kazuo Muraoka 3434 Shimada, Hikari-shi, Yamaguchi Prefecture Inside Nippon Steel Corporation Hikari Works (56) References JP-A-3-104826 (JP, A) JP JP-A-57-164937 (JP, A) JP-A-56-123330 (JP, A) JP-A-3-211152 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) C21D 9 / 63 B65H 20/10

Claims (1)

(57) [Claims] 1. A box-shaped pad body disposed immediately below a thin steel sheet traveling in a horizontal direction and connected to an appropriate fluid supply source, and the thin steel sheet is positioned at both front and rear ends of the pad body along the passing direction. A fluid static pressure pad formed in the width direction and comprising a pair of fluid ejection ports for ejecting fluid obliquely upward toward the center of the pad body, wherein moving nozzles opposed to both sides in the steel sheet width direction between the fluid ejection ports A plate is installed, and a collision plate extending in the passing direction is integrally connected to a tip end of the nozzle plate at an interval, and a fluid can be ejected from a gap between the nozzle plate and the pad body upper plate. A horizontal fluid holding width variable pad made of thin steel plate characterized by the following characteristics.