JP3076657B2 - 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 fluid is regulated by the action of the baffle plate, and the floating of the steel plate is certainly eliminated. Although the advantages described above are recognized, new problems have arisen in consideration of the variation in the sheet width, specifically, the blower cost.

That is, according to Japanese Patent Laid-Open Publication No. Sho 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 plate and the floater, which may cause a single 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 the predetermined maximum width of the steel sheet to be passed. As a result, the outflow of the fluid from this location is very large (especially remarkable in the case of a narrow width), which causes 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 influenced by width fluctuation, 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.

[0009]

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, on both sides in the width direction of the steel sheet between the fluid ejection ports, a moving nozzle plate having a collision plate attached at an end at an interval is installed to face each other, and a plurality of parallel nozzle plates are provided between the opposing collision plates. A horizontal fluid holding width variable pad made of a thin steel plate, characterized in that at least a part of the fluid distribution plate is arranged to be movable in the same direction as the moving nozzle plate.

[0010]

According to the present invention, since the moving nozzle plate having the collision plate at the tip is disposed to face in the width direction of the steel plate and the fluid dispersion plate is adjustable between the collision plates, the collision plate and the fluid dispersion plate are provided. Since the plates can be separately arranged at the optimum positions and intervals according to the width of the steel plate, the fluid flowing in the width direction of the steel plate can be used without waste, and stable floating holding traveling of the steel plate is achieved.

[0011]

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 plan view, a front view, and a side view of FIG.

As shown in FIGS. 1 and 2, the pad according to the present invention is disposed immediately below a thin steel sheet S running in a horizontal direction, and is a box-shaped pad body connected to an appropriate fluid supply source. And a pair of fluid ejection ports (slits) 2 for ejecting fluid obliquely upward toward the center of the pad body at both front and rear end positions of the pad body 1 along the sheet passing direction. Has formed. The pair of fluid jets 2 is shown in FIG.
As shown in (c) of FIG.
A and a side edge of the upper surface (pressure receiving surface) 1B of the pad body. Further, in the present invention, two moving nozzle plates 3 slidable over a predetermined range in the width direction are installed opposite to each other on both sides in the width direction of the steel plate between the pair of fluid ejection ports 2, and at the tip of the nozzle plate 3. The collision plates 4 extending in the passing direction are integrally connected at intervals.

The moving nozzle plate 3 is provided with a moving device 6 such as a cylinder at a rear portion thereof. The moving device 6 is located at an optimum position set in advance according to the width of the thin steel sheet S to be processed. The nozzle plate 3 and the collision plate 4 are moved. Although not shown, it is preferable to appropriately provide a guide means in order to smoothly slide the nozzle plate 3.

On the other hand, in the present invention, a plurality of fluid dispersion plates 7 parallel to the collision plate 4 are arranged on the upper surface 1B of the pad body 1 surrounded by the collision plate 4 and the pair of fluid ejection ports 2 as shown. ing. The height of the fluid dispersion plate 7 may be the same height as the collision plate 4 or lower than the collision plate. Although the fluid distribution plate 7 shown has established a total of four, divided at the center of these two by two and two pairs, and a moving nozzle plate 3 for each set can be moved in the same direction. As a moving mechanism of the fluid dispersion plate 7, the dispersion plates of each set may be fixed to the movable bar 8, and the bar 8 may be driven by a cylinder or the like.

The moving form of the fluid dispersion plate 7 is as follows.
In addition to the method of moving collectively for each set, the mechanism becomes complicated, but it may be possible to move each dispersion plate independently, or without moving all the dispersion plates,
It is also possible to adopt a type in which one or two at the center side are fixed and the other dispersion plates are movable. Of course, the number of dispersion plates can be increased or decreased as appropriate. The fluid dispersion plate 7 and the collision plate 4 are located at optimal positions corresponding to the width of the thin steel plate,
That is, the pair of collision plates 4 is first set according to the plate width, and then the distance between the collision plates and the adjacent dispersion plates and the distance between the respective dispersion plates 7 are substantially uniform between the collision plates. The dispersion plates 7 are set so as to have different intervals.

As shown in FIG. 2B, the cross section at the tip of the movable nozzle plate 3 has an angle that spreads inwardly into the pad body, and a gap is formed between the bottom surface of the nozzle plate and the upper surface 1B of the pad body. This is communicated with a slit 5 formed on the upper surface of the pad main body along the direction of the plate passing, and serves as a fluid passage.

For example, a plurality of fluid pads of the present invention having such a configuration are arranged at appropriate intervals along a threading line of a thin steel plate S. In this case, the nozzle plate 3 (impingement plate 4) and each dispersion plate have already been arranged. The position 7 is set to an optimal position according to the width of the thin steel sheet S to be processed. During the passage, the fluid ejected from the pair of fluid ejection ports 2 is supplied to the fluid dispersion plate 7.
Further, since the fluid is interrupted and dispersed to some extent by the collision plate 4, a large amount of fluid does not flow out in the width direction of the steel plate, a suitable static pressure is maintained between the steel plate and the pad, 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. As shown in FIG. 2B, the fluid ejected from the slit 5 passes through the gap between the nozzle plate 3 and the pad upper surface 1B and hits the back surface of the collision plate 4, and turns upward to change the direction of the steel plate S.
Is sprayed on the lower surface in the vicinity of the edge portion of the steel sheet, and this helps the stable floating of the steel sheet. Therefore, the nozzle plate 3 (collision plate 4)
And the edge of the steel sheet S need to be set in such a positional relation that the above-mentioned action is reliably performed.
If such a relationship can be maintained, the steel sheet can be stably held immediately even if the steel sheet meanders.

In addition, when each member and the thin steel plate are in an optimal positional relationship with each other, the steel plate can be levitated 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 nozzle plate 3 and the fluid dispersion plate 7 are immediately changed.
It is sufficient to move the collision plate 4 and the fluid dispersion plate 7 to predetermined positions by the drive mechanism described above.

[0020]

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 with fluid from both the width direction and the longitudinal direction of the steel plate, excellent stability that cannot be obtained with the conventional hydrostatic pad is obtained, and the positions of the plurality of fluid dispersion plates are finely adjusted. Since it is possible, the static pressure can be generated most efficiently with the minimum fluid flow rate, the blower power can be further reduced, and a great industrial effect is achieved.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing one embodiment of the present invention.

2A is a plan view of FIG. 1, FIG. 2B is a front view,
(C) is a side view.

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 top plate 2 Fluid ejection port 3 Moving nozzle plate 4 Impact plate 5 Passing plate direction slit 6 Drive unit 7 Fluid dispersion plate 8 Movable bar

────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Koichi Waki 46-59, Ohara Nakahara, Tobata-ku, Kitakyushu-shi, Fukuoka Nippon Steel Corporation Machinery & Plant Business Department (56) References JP-A-60-184638 ( JP, A) JP-A-3-104826 (JP, A) JP-A-57-164937 (JP, A) JP-A-3-211152 (JP, A) JP-B 3-62619 (JP, B2) JP-B 62-37700 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) C21D 9/63 C21D 9/56 101 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 hydrostatic pad formed in the width direction and composed of a pair of fluid ejection ports that eject fluid obliquely upward toward the center of the pad body. A moving nozzle plate having a collision plate attached thereto is installed facing the same, a plurality of fluid dispersion plates parallel to the collision plate are arranged between the opposed collision plates, and at least a part of the fluid dispersion plate is moved by the moving nozzle. A horizontal fluid holding width variable pad made of thin steel plate, which is adjustable in the same direction as the plate.