JPH0617519Y2 - Water screen projection screen forming device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a water curtain projection screen forming apparatus for forming a projection screen by a water curtain, and in particular, a water curtain projection screen shape is formed by falling water in a water column shape. The present invention relates to a water curtain projection screen forming apparatus that makes it possible.

[Prior Art] Generally, there is known an outdoor movie theater in which a projection screen is set outdoors and an image is projected on the projection screen. The projection screens used in this outdoor theater are known to be sheet-like or board-like similar to those used in indoor theaters, and these projection screens are supports such as turrets assembled at a predetermined height. It is hung or attached by being stretched.

In the conventional outdoor movie theater, a projection screen is usually provided exclusively on land, and a larger projection screen is required to allow many spectators to watch a movie or the like.

When the projection screen is made large, the support for installing the projection screen must be made large, which complicates the assembling work and the disassembling work. Further, when a large projection screen is provided, a large space for the site is required by keeping a predetermined distance between the screen and the audience. For this reason, it is proposed to install an outdoor movie theater in a place facing the sea or lake, but in particular, it is quite difficult to support a screen for an indoor theater on the surface of water such as the sea. The screen size was also limited.

Therefore, a device has been proposed in which a water supply pipe having a predetermined length is provided with nozzles at predetermined intervals along the longitudinal direction, and water is ejected from these nozzles to form a projection screen by a water curtain. According to this device, it is possible to easily form a projection screen with a larger water curtain on an arbitrary place such as on the surface of water or on land, and a large outdoor movie theater or an advertising facility can be established by utilizing the coast. It will be possible to build.

[Problems to be Solved by the Invention] According to the projection screen device using the water curtain proposed above, it is possible to form a large screen on water or on land. However, in order to form a water curtain by ejecting water from the nozzle, the water droplets sprayed from the nozzle are advancing while colliding with the atmosphere, so the momentum disappears in the area far from the nozzle, There was a problem that the water particles diffused and the thickness of the water curtain could not be maintained and scattered.

Therefore, the present invention has been made to solve the above problems, and an object of the present invention is to provide a water curtain projection screen forming apparatus that can easily form a water curtain projection screen without ejecting water.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides an apparatus for forming a projection screen by a water curtain, in which a water tank is provided in the longitudinal direction along the upper edge of the projection screen formed as above. This water tank is formed in the shape of a gutter with an opening at the top, and at the bottom of the water tank is formed a predetermined distance along the longitudinal direction of the water tank to form pores for forming a water curtain projection screen by water drop in a water column below the water tank. Then, the water tank that receives the water falling from the water tank located at the upper stage is received by the water tank located at the lower stage, and at a predetermined interval in the height direction so that the water is sequentially dropped from the upper tank to the water tank located at the lower stage. The water supply means for supplying water to the water tank located at the uppermost stage is provided in multiple stages separated from each other.

[Operation] With the above configuration, when water is continuously supplied to the uppermost water tank of the water tanks provided in multiple stages by the water supply means, the water in the water tank drops from each pore to the next water tank. A water curtain is formed between the water tanks by the falling water having a water column shape. Then, the water is successively dropped from the upper tier to the lower basin, and a projection screen of a water curtain is formed between the aquariums. Therefore, only by supplying water from the water supply means to the uppermost water tank, the water column projection water forms a multi-stage water curtain projection screen.

[Embodiment] A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, reference numeral 10 denotes a water tank, and this water tank 10 has a rectangular parallelepiped shape and is formed in a gutter shape with an open upper part.

As shown in FIG. 2, on the bottom surface of the water tank 10, there are formed pores 7 at a substantially central portion below the water tank 10 at predetermined intervals along the longitudinal direction of the water tank 10 for dropping water in the water tank 10. ing. The pores 7 are provided, for example, with a diameter of about 1.5 mm and an interval of about 5 mm, and water drops from the pores 7 to form a water column projection screen 12 having a water column shape. The length of the water tank is, of course, arbitrarily determined according to the desired size of the projection screen of the water curtain in the length direction.

As shown in FIG. 1, the water tank 10 is arranged in three stages in the multi-stage illustrated example at predetermined intervals in the height direction,
It is supported by two supports 11 that are erected on both sides,
The water falling from the upper water tank 10 is received by the lower water tank 10, and the water is sequentially dropped from the upper water tank to the lower water tank 10, and the water curtain projection screen 12 is provided between the water tanks 10. Are formed.
At this time, the uppermost water tank 10 is arranged in the longitudinal direction along the upper edge of the projection screen 12 to be formed. Further, below the lowermost water tank 10, there is provided a recovery tank 13 for receiving the water falling from the water tank 10, and the water in the recovery tank 13 is supplied to the uppermost water tank 10 by a water supply pump 15 constituting a water supply means 14. To be sent to.

Next, the operation of this embodiment will be described.

In order to form the projection screen 12 on the water surface or on an arbitrary place on the land surface and project an image or the like on the projection screen 12, first, the water tank 10 is supported by the support 11 and installed at a predetermined position.
After installation, the water in the recovery tank 13 is continuously sent to the uppermost water tank 10 by the water supply pump 15.

Water in the water tank 10 continuously descends from each of the pores 7 to the next-stage water tank 10, and a water column projection screen 12 having a water column shape is formed between the water tanks 10 along the longitudinal direction thereof.
Since the screen 12 formed by the water curtain is formed by falling water, the layer thickness of the water curtain is formed to be substantially constant. Also,
Since the water supply pump 15 only needs to send water to the uppermost water tank 10 and does not have to send water at a predetermined water pressure, its power is reduced. Furthermore, since water is not ejected from the nozzle, there is no need for a device or the like to prevent the water droplets that have been sprayed in the area far from the nozzle from losing momentum and spreading, and it is easy to do without adding any other device. The projection screen 12 of the water curtain can be formed on the screen.

Then, the water is sequentially dropped from the upper stage to the lower water tank 10,
A projection screen 12 of a water curtain is formed between the water tanks 10.

The flow of water in the form of a water column forming this water curtain, because the water is viscous to some extent, drops from the pores 7 and its surface comes into contact with the atmosphere, creating a frictional force there.
Water particles enter each other and become turbulent. Therefore, when light is projected onto a water column shaped water curtain, the light is refracted to some extent and transmitted. Therefore, by utilizing this, when an image is projected on the water curtain by the projection device 8 from the opposite side of the water curtain as shown in FIG. 2, the image projected on the water curtain is almost clearly projected. By viewing the video and playing the required audio along with the video from the installed speaker, a theater with a different taste can be formed.

Therefore, only by supplying water to the uppermost water tank 10, the water curtain projection screens 12 are formed by falling water in multiple stages, and an image can be projected on each projection screen 12. For this reason, if each water tank 10 is installed so that these water curtain projection screens 12 are formed according to each floor, the respective images can be viewed on each floor. Further, since the recovery tank 13 is provided below the lowermost water tank 10 and the water in the recovery tank 13 is sent to the uppermost water tank 10 by the water supply pump 15, the water is circulated. If enough water is stored to form the water curtain, the multi-stage water curtain projection screen 12 can be easily formed even in a place where there is no water around.

If the image is projected on the formed water curtain and the projection effect is sufficiently obtained, the diameter and interval of the pores of the water tank are
It can be decided arbitrarily. In this case, if the space between the pores is narrowed, the water curtain formed as the pores come closer to each other becomes closer to the curtain shape, but the water falling from the pores comes into contact with the water from the adjacent pores in the vicinity of the pores. Then, it merges into a slit shape, and the water curtain on both sides of the water column is not formed. For this reason, a groove may be provided between each of the pores of the water tank, or a nozzle may be provided for each of the pores so that the water independently drops from the groove.

Further, the height of the water curtain can be arbitrarily determined if an image is projected on the formed water curtain. For example, if pores are provided at intervals of about 5 mm and with a diameter of about 1.5 mm, the image projected on the formed water curtain is projected almost clearly up to about 3 m from the water tank, and after that it has a water column shape. Images can be displayed on the water curtain until the water becomes granular.

The pores of the water tank described above may be formed in parallel in a plurality of rows, for example, three rows as shown in FIG. 3, at predetermined intervals along the longitudinal direction. That is, the pores 7 are arranged such that the incident light on the water curtain surface formed by the water descending from each of the pores 7 hits more the water column group of the falling water that constitutes the water curtain. With such a configuration, when an image is projected with light on the water curtain formed by the falling water from each pore 7, the image is less likely to pass through between the water column groups of the falling water. The image projected on the formed water curtain projection screen 9 is more clearly projected.

[Effects of the Invention] In summary, the present invention exhibits an excellent effect that a multi-stage water curtain projection screen can be easily formed by only supplying water to the uppermost stage of the multi-stage water tank.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a perspective view showing an example of pores of a water tank, and FIG. 3 is a perspective view showing another example of pores of a water tank. In the figure, 7 is a pore, 10 is a water tank, 12 is a projection screen,
14 is a water supply means.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshimitsu Araki 3-1-1, Toyosu, Koto-ku, Tokyo Ishikawajima Harima Heavy Industries Ltd. Tokyo Second Factory (72) Inventor Toshikuni Iijima 3-chome, Toyosu, Koto-ku, Tokyo No. 15 Ishikawajima Harima Heavy Industry Co., Ltd. Tokyo Second Factory (72) Inventor Isota Amano 3-15-15 Toyosu, Koto-ku, Tokyo Ishikawajima Harima Heavy Industry Co., Ltd. Tokyo Second Factory (72) Inventor Takeshi Udagawa Tokyo 3-1-15-1 Toyosu, Koto-ku, Ishikawajima Harima Heavy Industries, Ltd. Tokyo Second Factory (72) Inventor Masayuki Ogino 1-1-19 Mouri, Koto-ku, Tokyo Ishikawajima Harima Heavy Industries, Ltd. Koto Office (56) Reference References Japanese Patent Laid-Open No. 50-60379 (JP, A) Actual Development No. 50-135493 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A device for forming a projection screen by means of a water curtain, wherein a water tank is provided in a longitudinal direction along an upper edge of the projection screen formed above, and the water tank is formed in a gutter shape with an upper opening, and a bottom portion thereof. Along the lengthwise direction of the water tank, water is dropped from the water tank located at the upper stage by forming pores for forming a water curtain projection screen by water drop in the water column below the water tank at predetermined intervals. Are received in the water tank located in the lower tier, and the water is placed in the water tank located in the uppermost tier in a multi-tiered manner in order to drop the water from the upper tier to the water tier located in the lower tier. A water curtain projection screen forming apparatus comprising a water supply means for supplying water.