JPH0792588B2 - Water curtain projection screen structure and projection device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water curtain projection screen structure and a projection apparatus, and in particular to a water projection screen for forming a large projection screen suitable for use in an outdoor movie theater. The present invention relates to a curtain projection screen structure and a projection device for projecting and projecting an image on the water curtain projection screen.

[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 screen used in this outdoor theater is known to have the same sheet shape or board shape as that used in an indoor theater. These projection screens are mounted by being suspended or stretched on a support body such as a turret assembled at a predetermined height.

[Problems to be Solved by the Invention] In the conventional outdoor movie theater, a projection screen is usually provided on land, and a larger projection screen is required to allow many spectators to watch a movie or the like. become.

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.

In particular, it is proposed to install an outdoor movie theater in a place facing the sea or lake, but it is quite difficult to support a screen for an indoor theater on the water surface such as the sea, and There was also a limit to the size.

Therefore, the present invention makes it possible to easily form a larger projection screen on an arbitrary place such as on the surface of water or on land, and to construct a large outdoor movie theater or an advertising facility by utilizing the coast or the like. The present invention provides a water curtain projection screen structure and a projection device that can be used.

[Means for Solving the Problems] In order to achieve the above object, the water curtain projection screen structure of the present invention includes a water pipe having a predetermined length and a water pipe connected to the water pipe at a predetermined pressure. And a water supply pump for pumping water, etc., and a large number of water supply pipes are provided to form fan-shaped water curtains, and predetermined intervals are provided along the longitudinal direction so that the tips of adjacent fan-shaped water curtains overlap each other. Is provided between the fan-shaped nozzles and the fan-shaped nozzles of the water pipe, and fills the gap between the adjacent fan-shaped water curtains. And a semi-circular nozzle forming the.

The projection apparatus of the present invention includes a water supply pipe having a predetermined length, a water supply pump for supplying water to the water supply pipe at a predetermined pressure, and a large number of fan-shaped water curtains provided on the water supply pipe. And the fan-shaped nozzles of the water pipe are provided adjacent to each other, and the fan-shaped nozzles of the water supply pipe are formed adjacent to each other so that the end portions of the adjacent fan-shaped water curtains overlap each other at a predetermined interval along the longitudinal direction. A semi-circular nozzle that forms an approximately semi-circular water curtain with a height lower than the jet height from the fan-shaped nozzle so as to fill the gap between the fan-shaped water curtain, and to project an image on the projection screen of the water curtain. And the projection means of.

[Operation] Next, the operation of the present invention will be described.

According to the above configuration, water or the like drawn up by the water supply pump is pressure-fed to the water supply pipe and is sprayed from the fan-shaped nozzle and the semicircular nozzle provided in the water supply pipe at predetermined intervals. The fan-shaped water curtains from the fan-shaped nozzles are formed so that adjacent tip portions overlap each other, and the semi-circular water curtains from the semi-circular nozzles are formed so as to fill the gaps between the adjacent fan-shaped water curtains. As described above, the fan-shaped nozzles are provided along the longitudinal direction of the water pipe, and the semi-circular nozzles are provided between the adjacent fan-shaped nozzles to form the semi-circular water curtain. Can be closed to form a uniform and large water curtain screen. That is, since the fan-shaped water curtain from the fan-shaped nozzle has a small injection angle of the fan-shaped nozzle, the injection height can be kept large without increasing the capacity of the water supply pump, but a gap is formed between the adjacent fan-shaped water curtains. . However, this gap is closed by a semicircular water curtain formed by a semicircular nozzle, so that a uniform and large water curtain projection screen is formed as a whole.

By projecting and projecting an image from the projection means on the screen, an outdoor movie theater or the like can be easily set up.

Embodiment An embodiment according to the present invention will be described with reference to the drawings.

As shown in FIG. 1, the water curtain projection screen structure according to the present invention has, for example, a water supply pipe 1 which is floated and supported on a water surface w of a pool or the like with a predetermined length, and the water supply pipe 1 is used to It mainly comprises a water supply pump 2 for pumping water and the like and pumping it, a fan-shaped nozzle 3 and a semicircular nozzle 4 provided in the water supply pipe 1, and these nozzles 3 and 4.

The length of the water pipe 1 is arbitrarily determined according to the desired size of the projection screen 13 of the water curtain in the length direction, and
As shown in FIG. 2, it is composed of a metal pipe or a synthetic resin pipe divided into predetermined lengths. The divided water supply pipes 1 are connected to each other by a flexible joint pipe 7 and set to a desired length.
Further, a water supply pump 2 for pumping water and the like for pressure feeding is connected to one end of the water supply pipe 1. The water supply pump 2 is installed on the poolside in the illustrated example. A connection pipe 9 is connected to the discharge port of the water supply pump 2, and the water supply pipe 1 is connected to the water supply pump 2 via the connection pipe 9.

Further, as shown in FIG. 3, the water supply pipe 1 is provided with a floating body 10 for floating and supporting the water supply pipe 1 along the longitudinal direction thereof. The floating body 10 does not need to be provided in the water supply pipe 1 unless the water supply pipe 1 needs to be floated above the water surface. On the upper surface of the water pipe 1, there are fan-shaped nozzles 3 for spraying a fan-like water upward from the upper surface of the water-jet pipe 1 with a predetermined space therebetween. A semi-circular nozzle 4 for making a circular fountain is provided, respectively. Specifically, the fan-shaped nozzle 3 is attached to the water pipe 1 as shown in FIG.
It has a spout 11 with an upward water discharge or fountain angle α of about 20 degrees. Further, although it is arbitrarily determined by the water pressure supplied to the water supply pipe 1, the fan-shaped nozzle 3 is set so that the height of the water discharge or the fountain is about 15 m. Of course, the height of this fountain can be arbitrarily determined according to the desired size of the screen.

On the other hand, as shown in FIG. 5, the semicircular nozzle 4 has a spout 12 above the water supply pipe 1 for spouting or spraying water at a water spouting angle α of about 170 degrees. The semicircular nozzle 4 forms a water curtain under the water curtain spouted by the fan-shaped nozzle 3, and the fan-shaped nozzle 3 and the semicircular nozzle 4 form a uniform and flat water curtain above the water supply pipe 1. Will be done.

The semi-circular nozzle 4 is located on the front surface or front surface side of the water curtain formed by the fan-shaped nozzle 3, forms a water curtain at the lower part, and forms a mist on the surface of the water curtain formed by the fan-shaped nozzle 3. It is configured to stack water curtains.

Next, the operation of this embodiment will be described. In order to form the projection screen 13 on the water surface of a pool or the like and project an image or the like on the projection screen 13, first, as shown in FIG. Install it in the specified position. Each of the water pipes 1 is floatingly supported on the water surface by the floating body 10. Further, the length of the water pipe 1 is arbitrarily determined depending on the size of the projection screen 13. In this way, the water pipe 1 is floated and supported on the water surface of the pool or the like, and then the water in the pool is pumped up by the water supply pump 2 and pumped to the water pipe 1. The water pressure-fed to the water pipe 1 is sprayed upward from the fan-shaped nozzle 3 and the semicircular nozzle 4 to form a projection screen 13 of a water curtain.

As shown in FIG. 6, the fountain ejected from the fan-shaped nozzle 3 is formed as a water curtain A from the fountain angle of the fountain port 11. Further, the semicircular nozzle 4 provided between the fan-shaped nozzles 3 has a large fountain angle and a low fountain or discharge height, and a water curtain B is formed at a relatively low position between the water curtains A. Thus, the projection screen 13 of a flat water curtain is formed above the water pipe 1 and along the longitudinal direction of the water pipe A without forming a void area between the water curtains A.

Further, since the semicircular nozzle 4 is located in front of the fan-shaped nozzle 3, the water curtain B formed thereby is formed on the surface of the water curtain A so as to cover it.

Further, seawater or the like ejected from the fan-shaped nozzle 3 and the semi-circular nozzle 4 into the atmosphere mixes with the atmosphere to form water droplets, which are separated into smaller water droplets and atomized. Therefore, the screen 13 of the water curtain formed by the fountain is formed as a fog-like curtain having a very low degree of light transmission.

The water curtain formed as described above becomes a suitable projection screen 13. It is possible to project an image from the projection means 5 arranged at an appropriate position away from the water curtain so that a large number of spectators near the pool can view the image. By playing the sound required with this video from a speaker installed on the poolside or the like, it is possible to form an outdoor theater with a different taste.

As shown in FIG. 7, a semicircular nozzle 4 is integrally formed in front of and behind the water curtain A formed on the fan-shaped nozzle 3 so that the water curtain B is formed on the surface thereof. It is a thing.

With such a configuration, the water curtain B can be formed on the front surface or the back surface of the hydrogen A without being affected by the wind that blows before and after the projection screen 13 of the water curtain, which is flat. A screen having a surface can be formed.

Further, in the present embodiment, two combinations of the fan-shaped nozzle 3 and the semicircular nozzle 4 are used. However, in order to form an even larger water curtain, a rod-shaped nozzle having a wider spray height and a higher water discharge height is used. You may provide in combination.

FIG. 8 is a diagram showing another embodiment according to the present invention.

As shown in FIG. 1, the water curtain projection screen structure according to the present invention not only has its water pipe positioned downward and spouts water upward to form a water curtain transfer screen, but also FIG. As shown in, the water pipe 1 may be installed above and water may be sprayed downward to form the projection screen 14 of the water curtain. That is, as shown in FIG. 8, the water curtain projection screen structure is installed on the support 15 provided above,
A water supply pipe 1 having a predetermined length, and a water supply pump 2 for pumping water to the water supply pipe 1 and pumping the water at a predetermined water pressure,
The water pipe 1 is mainly composed of a fan-shaped nozzle 3 and a semicircular nozzle 4 which are provided along the longitudinal direction of the water pipe 1 at predetermined intervals to form a projection screen by a water curtain.

The water supply pipe 1, the water supply pump 2, the fan-shaped nozzle 3 and the semi-circular nozzle 4 are the same as in the embodiment shown in FIG. However, since the water curtain projection screen structure in the present embodiment does not float above the water, the water supply pipe 1 does not need to have the floating body 10 as shown in FIG.

Next, the operation of the present embodiment will be described. In order to form the projection screen 13 on the land such as a stage and project an image or the like on the screen, first, as shown in FIG. Install in place. The water pipe 1 will be supported by the support 15 provided on the stage. Further, the length of the water pipe 1 is arbitrarily determined depending on the size of the projection screen 13. After the water supply pipe 1 is thus supported by a support such as a stage, water is pumped up from the water supply pump 2 and pressure-fed to the water supply pipe 1. The water pressure-fed to the water pipe 1 is sprayed upward from the fan-shaped nozzle 3 and the semicircular nozzle 4 to form a projection screen 13 of a water curtain.

As shown in FIG. 6, the fountain ejected from the fan-shaped nozzle 3 is formed as a water curtain A from the fountain angle of the fountain port 11. Further, the semicircular nozzle 4 provided between the fan-shaped nozzles 3 has a large fountain angle and a low fountain or discharge height, and a water curtain B is formed at a relatively low position between the water curtains A. Thus, the projection screen 13 of a flat water curtain is formed above the water pipe 1 and along the longitudinal direction of the water pipe A without forming a void area between the water curtains A.

Further, since the semicircular nozzle 4 is located in front of the fan-shaped nozzle 3, the water curtain B formed thereby is formed on the surface of the water curtain A so as to cover it.

Further, the water jetted from the fan-shaped nozzle 3 and the semi-circular nozzle 4 to the atmosphere mixes with the atmosphere to form water droplets, which are separated into smaller water droplets and atomized. Therefore, the screen 13 of the water curtain formed by the fountain is formed as a fog-like curtain having a very low degree of light transmission.

The water curtain formed as described above becomes a suitable projection screen 13. An image can be projected from the projection means 5 arranged at an appropriate position apart from the water curtain so that the audience can appreciate the image. The audio required for this video can be played from a speaker installed in the theater to form an indoor theater with a different taste.

As shown in FIG. 7, a semicircular nozzle 4 is integrally formed in front of and behind the water curtain A formed on the fan-shaped nozzle 3 so that the water curtain B is formed on the surface thereof. It is a thing.

The water curtain B can be fountain-formed on the front surface or the back surface of the water curtain A without being affected by the wind blown before and after the projection screen 13 of the water curtain formed by such a configuration. A screen with a flat surface can be formed.

Further, in the present embodiment, two combinations of the fan-shaped nozzle 3 and the semicircular nozzle 4 are used. However, in order to form an even larger water curtain, a rod-shaped nozzle having a wider spray height and a higher water discharge height is used. You may provide in combination.

In the water curtain projection screen structure according to the present invention, it is not necessary to limit the water pipe group in which the water pipes are connected in one row as shown in FIG. If desired, as shown in FIG. 9, a water pipe group 16 in which water pipes are connected in a line may be installed in a plurality of stages in the vertical direction.
That is, the water curtain projection screen structure has three support members 1 fixed in the up-and-down direction along the columns 17 standing on both sides.
8, 18 and 18 are provided with a water supply pipe having a predetermined length, a water supply pump 2 for pumping water to the water supply pipe 1 to pump the water at a predetermined water pressure, and the water supply pipe 1 in the longitudinal direction thereof. It is mainly composed of a fan-shaped nozzle 3 and a semi-circular nozzle 4 for forming a projection screen by a water curtain provided along a predetermined interval.

The water supply pipe 1, the water supply pump 2, the fan-shaped nozzle 3 and the semi-circular nozzle 4 are the same as in the embodiment shown in FIG. However, since the water curtain projection screen structure in the present embodiment does not float above the water, the water supply pipe 1 does not need to have the floating body 10 as shown in FIG.

Next, to form the projection screen 13 on land such as a ground for explaining the operation of this embodiment, first, as shown in FIG. 9, the water pipe 1 is installed at a predetermined position such as a ground. The water pipe 1 will be supported by the support 18. Further, the length of the water pipe 1 is arbitrarily determined depending on the size of the projection screen 13.
After the water pipe 1 is installed on the ground such as the ground in this manner, water is pumped up from the water supply pump 2 and pressure-fed to the water pipe 1. The water pressure-fed to the water pipe 1 is sprayed upward from the fan-shaped nozzle 3 and the semicircular nozzle 4 to project the water curtain projection screen.
13 will be formed.

As shown in FIG. 6, the fountain ejected from the fan-shaped nozzle 3 is formed as a water curtain A from the fountain angle of the fountain port 11. Further, the semicircular nozzle 4 provided between the fan-shaped nozzles 3 has a large fountain angle and a low fountain or discharge height, and a water curtain B is formed at a relatively low position between the water curtains A. Thus, the projection screen 13 of a flat water curtain is formed above the water pipe 1 and along the longitudinal direction of the water pipe A without forming a void area between the water curtains A.

Further, since the semicircular nozzle 4 is located in front of the fan-shaped nozzle 3, the water curtain B formed thereby is formed on the surface of the water curtain A so as to cover it.

Further, the water jetted from the fan-shaped nozzle 3 and the semi-circular nozzle 4 to the atmosphere mixes with the atmosphere to form water droplets, which are separated into smaller water droplets and atomized. Therefore, the screen 13 of the water curtain formed by the fountain is formed as a fog-like curtain having a very low degree of light transmission. Due to these actions, the second and third stage supports 18 are hidden by the mist-like water droplets and do not interfere with the screen.

As shown in FIG. 7, a semicircular nozzle 4 is integrally formed in front of and behind the water curtain A formed on the fan-shaped nozzle 3 so that the water curtain B is formed on the surface thereof. It is a thing.

The water curtain B can be fountain-formed on the front surface or the back surface of the water curtain A without being affected by the wind blown before and after the projection screen 13 of the water curtain formed by such a configuration. A screen with a flat surface can be formed.

Further, in this embodiment, the fan-shaped nozzle 3 and the semi-circular nozzle 4 are combined into two, but a rod-shaped nozzle in which the water jet height is increased by narrowing the fountain angle for forming a larger water curtain. May be provided in combination.

In the water curtain projection screen structure according to the present invention, as shown in FIG. 9, the direction in which the fan-shaped nozzles 3 and the semicircular nozzles 4 spray water is not limited to the upper or lower direction, but the water curtain is sprayed laterally. A projection screen may be formed.
That is, as shown in FIG. 10, the water curtain projection screen structure has a water pipe 1 having a predetermined length, which is installed along the columns 20 and 20 standing on both sides, and the water pipe 1 And a fan-shaped nozzle 3 for forming a projection screen 13 by a water curtain, which is provided in the water supply pipe 1 at predetermined intervals along the longitudinal direction of the water supply pipe 2 It is mainly composed of a circular nozzle 4.

The water supply pipe 1, the water supply pump 2, the fan-shaped nozzle 3 and the semi-circular nozzle 4 are the same as in the embodiment shown in FIG. However, since the water curtain projection screen structure in the present embodiment does not float above the water, the water supply pipe 1 does not need to have the floating body 10 as shown in FIG.

Next, the operation of this embodiment will be described. In order to form the transfer screen 13 on land, first, as shown in FIG. 10, the water pipe 1 is installed at a predetermined position. The water pipes 1 and 1 are vertically supported by columns 20 and 20, respectively. The length of the water pipe 1 is a projection screen.
It will be arbitrarily determined by the size of 13. After the water supply pipe 1 is supported on land as described above, water is pumped up from the water supply pump 2 and pressure-fed to the water supply pipe 1. The water pressure-fed to the water pipe 1 is sprayed upward from the fan-shaped nozzle 3 and the semicircular nozzle 4 to form a projection screen 13 of a water curtain.

As shown in FIG. 6, the fountain ejected from the fan-shaped nozzle 3 is formed as a water curtain A from the fountain angle of the fountain port 11. Further, the semicircular nozzle 4 provided between the fan-shaped nozzles 3 has a large fountain angle and a low fountain or discharge height, and a water curtain B is formed at a relatively low position between the water curtains A. Thus, the projection screen 13 of a flat water curtain is formed above the water pipe 1 and along the longitudinal direction of the water pipe A without forming a void area between the water curtains A.

Further, since the semicircular nozzle 4 is located in front of the fan-shaped nozzle 3, the water curtain B formed thereby is formed on the surface of the water curtain A so as to cover it.

Further, the water jetted from the fan-shaped nozzle 3 and the semi-circular nozzle 4 to the atmosphere mixes with the atmosphere to form water droplets, which are separated into smaller water droplets and atomized. Therefore, the screen 13 of the water curtain formed by the fountain is formed as a fog-like curtain having a very low degree of light transmission.

As shown in FIG. 7, a semicircular nozzle 4 is integrally formed in front of and behind the water curtain A formed on the fan-shaped nozzle 3 so that the water curtain B is formed on the surface thereof. It is a thing.

The water curtain B can be fountain-formed on the front surface or the back surface of the water curtain A without being affected by the wind blown before and after the projection screen 13 of the water curtain formed by such a configuration. A screen with a flat surface can be formed.

Further, in the present embodiment, two combinations of the fan-shaped nozzle 3 and the semicircular nozzle 4 are used. However, in order to form an even larger water curtain, a rod-shaped nozzle having a wider spray height and a higher water discharge height is used. You may provide in combination.

As shown in FIG. 11, the water projection apparatus according to the present invention mainly has a water pipe 1 which is floated and supported on a water surface w such as the sea and has a predetermined length, and sea water is pumped up to the water pipe 1. A water supply pump 2 for pressure feeding, a fan-shaped nozzle 3 and a semicircular nozzle 4 provided on the water supply pipe 1, and a projection for projecting an image on a projection screen of a water curtain formed by these nozzles 3 and 4. It is mainly composed of means 5.

The length of the water pipe 1 is arbitrarily determined according to the desired size of the projection screen 13 of the water curtain in the length direction, and
It is composed of a metal pipe or a synthetic resin pipe divided into predetermined lengths. The divided water supply pipes 1 are connected to each other by a flexible joint pipe 7 and set to a desired length. A water supply pump 2 for pumping seawater or the like and pumping it is connected to one end of the water supply pipe 1. In the illustrated example, the water supply pump 2 is attached to an operation ship 8 for towing the water supply pipe 1 in order to position it on the desired sea or the like. A towing connecting pipe 9 for towing the water supply pipe 1 to the surface of water such as the sea is connected to a discharge port of the water supply pump 2, and the water supply pipe 1 is connected to the water supply pump 2 via the towing connection pipe 9. Will be done.

Further, as shown in FIG. 3, the water supply pipe 1 is provided with a floating body 10 for floating and supporting the water supply pipe 1 along the longitudinal direction thereof. On the upper surface of the water pipe 1, there are fan-shaped nozzles 3 for spraying a fan-like water upward from the upper surface of the water-jet pipe 1 with a predetermined space therebetween, and the fan-shaped nozzles 3 are located between the fan-shaped nozzles 3 and located above the fan-shaped nozzle 3. A semi-circular nozzle 4 for making a circular fountain is provided, respectively. Specifically, the fan-shaped nozzle 3 is attached to the water supply pipe 1 as shown in FIG. 4, and has a water spouting port 11 with a water discharge upward or a fountain angle α of about 20 degrees. Further, although it is arbitrarily determined by the water pressure supplied to the water supply pipe 1, the fan-shaped nozzle 3 is set so that the height of the water discharge or the fountain is about 15 m. Of course, the height of this fountain can be arbitrarily determined according to the desired size of the screen.

On the other hand, as shown in FIG. 5, the semicircular nozzle 4 has a spout 12 above the water supply pipe 1 for spouting or spraying water at a water spouting angle α of about 170 degrees. The semicircular nozzle 4 forms a water curtain under the water curtain spouted by the fan-shaped nozzle 3, and the fan-shaped nozzle 3 and the semicircular nozzle 4 form a uniform and flat water curtain above the water supply pipe 1. Will be done.

The semi-circular nozzle 4 is located on the front surface or front surface side of the water curtain formed by the fan-shaped nozzle 3, forms a water curtain at the lower part, and forms a mist on the surface of the water curtain formed by the fan-shaped nozzle 3. It is configured to stack water curtains.

The projection means 5 is a projection screen of a water curtain formed by the fan-shaped nozzle 3 and the semi-circular nozzle 4 as shown in FIG.
It is composed of a projector 14 for projecting images etc. on 13,
The projector 14 is provided on the hull 15 in the illustrated example so as to be located at a predetermined distance from the projection screen 13, but the projector 14 is not limited to this, and may of course be installed on land such as a coast. .

Next, the operation of this embodiment will be described. First, in order to form a projection screen 13 on the surface of water such as a sea, a lake or a river, and project an image or the like on the projection screen 13, first,
As shown in the figure, the water pipe 1 is towed by the operation ship 8 and installed at a predetermined position. Each of the water pipes 1 is floatingly supported on the water surface by the floating body 10. Further, the length of the water pipe 1 is arbitrarily determined depending on the size of the projection screen 13. After the water supply pipe 1 is thus floated and supported on the surface of water such as the sea, seawater or the like is pumped up from the water supply pump 2 and pressure-fed to the water supply pipe 1. The water pressure-fed to the water supply pipe 1 is sprayed upward from the fan-shaped nose 3 and the semicircular nozzle 4 to form a projection screen 13 of a water curtain.

As shown in FIG. 6, the fountain ejected from the fan-shaped nozzle 3 is formed as a water curtain A from the fountain angle of the fountain port 11. Further, the semicircular nozzles 4 provided between the fan-shaped nozzles 3 have a large fountain angle and a low fountain or discharge height, and the water curtain B is formed at a relatively low position between the water curtains A. As a result, a flat projection screen 13 of a water curtain is formed above the water pipe 1 and along the longitudinal direction of the water pipe A without forming a void area below the water curtain A.

Further, since the semicircular nozzle 4 is located in front of the fan-shaped nozzle 3, the water curtain B formed thereby is formed on the surface of the water curtain A so as to cover it.

Further, seawater or the like ejected from the fan-shaped nozzle 3 and the semi-circular nozzle 4 into the atmosphere mixes with the atmosphere to form water droplets, which are separated into smaller water droplets and atomized. Therefore, the screen 13 of the water curtain formed by the fountain is formed as a fog-like curtain having a very low degree of light transmission.

The water curtain formed as described above becomes a suitable projection screen 13. An image can be projected from the projection means 5 provided on the hull 15 or the like disposed at an appropriate position away from the water curtain so that a large number of spectators at the seaside, lakeside or riverside can view the image. The audio necessary for this video can be played from the hull 15 or on land to form an open-air theater with a different going.

As shown in FIG. 7, a semicircular nozzle 4 is integrally formed in front of and behind the water curtain A formed on the fan-shaped nozzle 3 so that the water curtain B is formed on the surface thereof. It is a thing.

The water curtain B can be fountain-formed on the front surface or the back surface of the water curtain A without being affected by the wind blown before and after the projection screen 13 of the water curtain formed by such a configuration. A screen with a flat surface can be formed.

Further, in this embodiment, the fan-shaped nozzle 3 and the semi-circular nozzle 4 are combined into two, but a rod-shaped nozzle in which the water jet height is increased by narrowing the fountain angle for forming a larger water curtain. May be provided in combination.

[Advantages of the Invention] Since the present invention is as described above, it has the following excellent advantages.

(1) A fan-shaped nozzle is provided in a water pipe to which water or the like is pumped by a water supply pump to form a fan-shaped water curtain, and a semi-circular nozzle is provided between the fan-shaped nozzles to form a semi-circular water curtain. Therefore, it is possible to form a uniform and large projection screen with a large water curtain at any place such as outdoors.

(2) By projecting and projecting an image from the projection means on the projection screen formed by the water curtain formed as described above, a projection device suitable for use as an outdoor movie theater or an advertising facility can be realized.

[Brief description of drawings]

FIG. 1 is a conceptual explanatory view of the present invention, FIG. 2 is a front view showing a water pipe connection and nozzle arrangement according to the present invention, and FIG. 3 is a second view.
III-III sectional view of the drawing, FIG. 4 is a front view of the fan-shaped nozzle according to the present invention, FIG. 5 is a front view of the same semi-circular nozzle, and FIG.
FIG. 7 is a conceptual view of a water curtain formed in the water projection apparatus of the present invention, FIG. 7 is a partially cutaway side view showing a modified embodiment, and FIG. 8 is a conceptual explanation showing another embodiment of the present invention. FIG. 9 is a conceptual explanatory view showing another embodiment of the present invention, FIG. 10 is a conceptual explanatory view showing another embodiment of the present invention, and FIG. 11 is another embodiment of the present invention. It is a conceptual explanatory diagram showing. In the figure, 1 is a water supply pipe, 2 is a water supply pump, 3 is a fan-shaped nozzle,
4 is a semi-circular nozzle, 5 is a projection means, and 13 is a projection screen of a water curtain.

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Mitsuo Watanabe 3-15 Toyosu, Koto-ku, Tokyo Ishikawajima Harima Heavy Industries Ltd. Tokyo Second Factory (72) Inventor Kunihiro Miyashita 3-1-1 Toyosu, Koto-ku, Tokyo No. 15 Ishikawajima Harima Heavy Industries Co., Ltd. Tokyo Second Factory (72) Inventor Fumihiko Kawamata 3-1-15 Toyosu, Koto-ku, Tokyo Ishikawajima Harima Heavy Industries Co., Ltd. Tokyo Second Factory (72) Inventor Miyagawa Hitoshi 3-1-1-17 Marunouchi, Chiyoda-ku Ishi Kawashima-Harima Heavy Industries Co., Ltd. Head Office Annex (56) References British Patent 1150745 (GB, A)

Claims (2)

[Claims] 1. A water supply pipe having a predetermined length, a water supply pump connected to the water supply pipe for pumping water or the like at a predetermined pressure, and a large number of water supply pipes provided in the water supply pipe, each fan-shaped water. The fan-shaped nozzles are provided between the fan-shaped nozzles of the water supply pipe and the fan-shaped nozzles that are formed at predetermined intervals along the longitudinal direction so that the tips of the adjacent fan-shaped water curtains overlap each other. And a semicircular nozzle forming a substantially semicircular water curtain at a height lower than the ejection height from the fan-shaped nozzle so as to fill the gap between the fan-shaped water curtains. 2. A water supply pipe having a predetermined length, a water supply pump connected to the water supply pipe for pumping water or the like at a predetermined pressure, and a plurality of water supply pipes provided in the water supply pipe, each fan-shaped water. The fan-shaped nozzles are provided between the fan-shaped nozzles of the water supply pipe and the fan-shaped nozzles that are formed at predetermined intervals along the longitudinal direction so that the tips of the adjacent fan-shaped water curtains overlap each other. The semi-circular nozzle that forms a substantially semi-circular water curtain with a height lower than the ejection height from the fan-shaped nozzle so as to fill the gap between the fan-shaped water curtain and the projection screen of the water curtain to project the image. And a projection device for the projection device.