JPH0815777A - Liquid curtain screen for projection - Google Patents

Abstract

PURPOSE:To obtain a liquid curtain screen for projection constituted so as an excellent liquid curtain to be formed even when a large-sized liquid curtain is formed by making fluid for projection flow down along a sheet hung down from a high place and forming the liquid curtain along the surface of the sheet. CONSTITUTION:At the upper part of the sheet 11, a conduit 13 provided with a slit 12 along in the width direction of the sheet 11 is disposed. From the conduit 13, high-reflection liquid or the like is made to flow down in a curtain state along the surface of the sheet 11 as the fluid for projection 15 so as to form the liquid curtain 14 on the surface of the sheet 11. A receiving funnel 16 is disposed at the lower part of the sheet 11 in parallel with the conduit 13 in order to recover the fluid for projection 15 flowing down along the surface of the sheet 11. Besides, a pump 18 supplying and circulating the fluid for projection 15 recovered by the funnel 16 to the conduit 13 is interposed in the middle of a circulating path 17. Thus, the stable large liquid curtain 14 is continuously formed. Besides, an effect by wind is reduced, only small power is required and a clear video is obtained in comparison with water vision.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid curtain screen for projection, and more particularly to a liquid curtain screen for projection capable of forming a large liquid curtain.

[0002]

2. Description of the Related Art When an object such as a live bullet or an arrow is passed through a cloth screen generally used for games and the like, traces of the object remain, which affects the image. In addition, in water vision, where water is sprayed in the air and the light is reflected by the water droplets to display an image, the image is unclear, and it is easily affected by air currents such as the wind, limiting the installation environment and intended use. Great power is required to make it.

[0003]

In order to solve such a problem, it has been attempted to form a liquid curtain and project the liquid curtain on it. In the case of the liquid curtain screen, a passage mark of an object remains like a cloth screen. Otherwise, you can get a clearer picture than water vision.

Therefore, as shown in FIG. 3, when the liquid 2 is flowed down from the conduit 1 in a curtain shape to form the liquid curtain 3,
Although it is possible to obtain a good liquid curtain 3 when the height position of the conduit 1 is relatively low, as the height position of the conduit 1 is gradually increased, the liquid curtain 3 formed below the liquid curtain 3 is disturbed.
That is, when the large liquid curtain 3 is formed, the liquid 2
Even if the initial velocity of the is zero, the downward velocity is gradually increased by its own weight, and the surrounding air is entrained and the wind is generated, so the wavy phenomenon 4 occurs, the liquid curtain 3 is cut off midway, or the surface tension of the liquid 2 causes the curtain. The width t may shrink, and there is a problem that a good liquid curtain cannot be obtained.

The present invention was devised to effectively solve the above problems. An object of the present invention is to provide a projection liquid curtain screen that can form a good liquid curtain even if the liquid curtain is upsized.

[0006]

SUMMARY OF THE INVENTION The present invention is a sheet suspended from a high place, and a projection liquid such as a high-reflecting liquid which is disposed on the sheet and is covered along the sheet surface. And a pump for circulating the liquid for projection, which flows down along the sheet and is collected under the conduit, to circulate the liquid for projection. Is.

Further, the sheet is wound around a sheet feeding roll and a sheet winding roll arranged above and below to move below the conduit.

[0008]

In the above structure, the projection liquid is made to flow down on the sheet surface so as to cover it, so that the projection liquid moves on the sheet surface. Therefore, the liquid curtain that constantly flows down is superposed on the sheet surface to form a screen having a two-layer structure.

Further, the sheet is moved so that a new sheet surface can always be obtained.

[0010]

An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, a large cloth or vinyl sheet 11 is hung from a high place over a predetermined width and a predetermined height in front of the projector, and an upper portion of the sheet 11 is placed above the sheet 11. A conduit 13 having a slit 12 is arranged along the sheet width direction. This conduit 1
In order to form the liquid curtain 14 on the sheet surface, 3 is made to flow down in a curtain shape as the projection liquid 15 such as a highly reflective liquid (for example, white paint) in which pigments are dispersed and mixed along the sheet surface. There is. At the lower part of the sheet 11, a receiving funnel 16 opened upward to collect the projection liquid 15 flowing down along the sheet surface is arranged in parallel with the conduit 13 along the sheet width direction. A pump 18 for supplying the projection liquid 15 recovered by the receiving funnel 16 to the conduit 13 and circulating it is provided in a circulation path 17 connecting one end in the longitudinal direction and the central upper portion of the conduit 13.

In this way, when the projection liquid 15 is made to flow down like a curtain on the sheet surface to form a screen having a two-layer structure of the sheet 11 and the liquid curtain 14 superposed on the sheet surface, the projection liquid 15 is formed. Since it slides on the sheet surface, resistance is given to the projection liquid 15 flowing down, and the flow-down speed becomes slower as compared with the case where the liquid curtain 3 is formed by a single liquid as in the conventional example. It is possible to prevent the curtain 14 from being cut. Further, since the liquid curtain 14 is guided along the sheet surface, the liquid curtain 14 can be formed along the sheet surface, and the curtain width is not reduced by the surface tension of the liquid 2 as in the conventional example. Therefore, a stable large liquid curtain 1
4 can be formed continuously. Furthermore, compared to water vision, it is less affected by the wind, requires less power, and produces clear images.

FIG. 2 shows a structure in which the sheet 11 is moved together with the liquid curtain 14. That is, the sheet 11 is laid over the sheet feeding roll 21 arranged in the upper part and the winding roll 22 arranged in the lower part, and the sheet 11 is arranged in the vicinity of the conduit 13 and the receiving funnel 16. A sheet surface is formed on a substantially vertical plane by being guided in the vertical direction by rollers 23 and 24.

Since an object has passed through the sheet 11, even if a passage mark is formed, the liquid curtain 14 of the projection liquid 15 which continuously flows down the passage mark covers the liquid, so that the image is not affected. . When a large amount of passage marks of an object remain on the sheet 11, the winding roll 22 is rotationally driven to unwind or wind the sheet 11 intermittently or at a slow speed, so that a new sheet surface can always be obtained.

[0015]

In summary, according to the present invention, the following excellent effects are exhibited.

(1) In claim 1, since the projection fluid is made to flow down to the sheet suspended from a high place and a liquid curtain is formed along the sheet surface along the sheet, it is not affected by wind or the like. A stable liquid curtain can be formed, and a clear and large screen can be formed.

(2) In claim 2, since the sheet is moved, a new sheet surface can always be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing a projection liquid curtain screen of the present invention.

FIG. 2 is a side sectional view showing a liquid curtain screen for projection of the present invention.

FIG. 3 is a diagram showing a conventional example when a liquid curtain is formed.

[Explanation of symbols]

 11 sheet 13 conduit 14 liquid curtain 15 projection liquid 18 pump 21 feeding roll 22 winding roll

Claims (2)

[Claims] 1. A sheet suspended from a high place, and a projection liquid, such as a high-reflecting liquid, which is arranged on the sheet surface so as to cover the sheet surface along the sheet and flows in a curtain shape. A projection liquid, comprising: a conduit for forming a liquid curtain; and a pump that circulates by supplying the conduit to the projection liquid flowing down along the sheet and collected under the conduit. Curtain screen. 2. The sheet is stretched over a sheet feeding roll and a sheet winding roll arranged above and below to move below the conduit.
Liquid curtain screen for projection as described.