JPH02201487A - Projection screen forming device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a novel projection screen forming device, and more particularly to a device capable of forming a gas curtain projection screen using gas ejected from a nozzle. It is something.

[Prior Art] Generally, outdoor movie theaters are known in which a projection screen is set outdoors and images are projected onto the screen.

The projection screens used in outdoor theaters are known to be sheet-like or board-like, similar to those used in indoor theaters. These projection screens are hung or stretched from a support such as a tower that is assembled at a predetermined height.

Conventional outdoor movie theaters usually have a projection screen installed exclusively on land, and a larger projection screen is required if a large number of viewers are to watch a movie.

If the projection screen is made larger, the support for installing it must be made larger, and the assembly and disassembly work becomes complicated. Furthermore, when a large projection screen is installed, a large amount of site space is required by maintaining a predetermined distance between the screen and the audience.

It has been proposed to install an outdoor movie theater in a location facing the sea or a lake, but it is particularly difficult to support a screen for an indoor theater on the water surface, and the size of the screen is also difficult. There were limits, too.

Therefore, the present applicant has proposed a device in which a water pipe having a predetermined length is provided with nozzles at predetermined intervals along its length, and water is spouted from these nozzles to form a projection screen using a water curtain. did.

According to this device, it is possible to easily form a larger projection screen using a water curtain at any location, such as on the surface of the water or on land, and it is possible to create a large outdoor movie theater or advertising facility by using the coast, etc. It will be possible to construct.

[Problems to be Solved by the Invention] According to the water screen projection screen device proposed by the present applicant, a large screen can be easily formed on water or on land. However, since water is sprayed from a nozzle to form a water curtain, water droplets are scattered around and water treatment is required after the screen is formed. limited to certain places. For this reason, the surrounding conditions and water treatment must be taken into consideration at the location where the screen is formed, making it difficult to handle the screen.

Furthermore, when a water curtain is formed by spouting water from a nozzle, ice particles are dispersed in a region far from the nozzle, increasing the thickness of the water curtain, and there is a problem that uniform aquatic plants cannot be maintained.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a gas curtain projection screen forming device that allows the screen to be easily handled, forms a uniform screen, and provides a sufficient projection effect. purpose.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a gas ejection pipe having a gas ejection nozzle that ejects a cloudy-colored gas using dry ice or the like, and a gas ejection pipe that is opposed to the gas ejection pipe. It is provided with a suction pipe for sucking in the ejected gas and forming a projection screen by a gas screen between them.

[Function] With the above configuration, cloudy white gas using dry ice or the like is directed from the gas ejection nozzle of the gas ejection pipe along its longitudinal direction onto the suction pipe provided opposite to the gas ejection pipe. It is squirted. The ejected gas is sucked into the suction pipe, and a gas curtain projection screen is formed between the gas ejection pipe and the suction pipe. In this way, a gas curtain projection screen is formed by the cloudy gas being ejected from the gas ejection pipe and sucked into the suction pipe, making it possible to form a large, uniform projection screen in any location. can.

[Example] A preferred embodiment of the present invention will be described based on the accompanying drawings.

As shown in FIG. 1, the projection screen forming device according to the present invention is disposed on a support 1 that is provided substantially horizontally above, has a predetermined length, and is harmlessly exposed below the support 1 along its longitudinal direction. a gas ejection pipe 3 equipped with a gas ejection nozzle 2 that ejects a cloudy-colored gas using dry ice or the like;
It mainly consists of a suction pipe 4 which is provided below and opposite to the gas ejection pipe 3 and for sucking in the gas.

The length of the gas ejection pipe 3 is arbitrarily determined depending on the size of the desired gas curtain in the longitudinal direction of the projection screen 5. A pump 6 for pumping cloudy-colored gas such as dry ice at a predetermined pressure is connected to the -#1 part of the gas ejection pipe 3.
is connected. In addition, on the lower surface of the gas jet pipe 3,
A gas ejection nozzle 2 for ejecting gas downward from this along its longitudinal direction is provided.

Furthermore, below the gas ejection pipe 3, a suction pipe 4 is provided which is spaced apart from the gas ejection pipe 3 by a predetermined distance, facing each other, and having approximately the same length as the gas ejection pipe 3. A suction device 7 for suctioning the suction pipe 4 is connected to one end of the suction pipe 4 . Further, a suction port 8 is formed in the upper surface of the suction pipe 4 along its longitudinal direction, and this suction port 8 sucks gas ejected from the gas ejection nozzle 2 of the gas ejection pipe 3. A projection screen 5 is formed between the gas screen and the suction pipe 4 by means of a gas screen.

Further, as shown in FIGS. 1 and 2, air ejection pipes 9 are arranged in parallel on the support body 1 at the same interval so as to sandwich the gas ejection pipe 3 therebetween. These air jet pipes 9 are provided with air jet nozzles 10 for jetting air downward, and the air jetted from the air jet nozzles 10 is as follows:
It is configured to form an air curtain 11 that flows along the front and back surfaces of the gas curtain formed by the gas ejection pipe 3 and the suction pipe 4, and to reliably maintain or regulate the layer thickness of the residue curtain. . Although not shown, an air suction pipe is provided opposite the air jet pipe, and the air jetted from the air jet pipe is sucked into this air suction pipe, so that the air curtain can be installed more reliably. The layer thickness of the gas curtain is further maintained or regulated.

Next, the operation of this embodiment will be explained.

In order to form a projection screen 5 at an arbitrary location on the water surface or on the land ring and to project images onto it, first, the gas jet pipe 3 is installed at a predetermined position.

The gas ejection pipe 3 is supported by a support 1 provided substantially horizontally above. Further, the length of the gas jet tube 3 is arbitrarily determined depending on the size of the projection screen 5. After the gas ejection tube 3 is supported by the support 1 in this manner, the pump 6 pumps the cloudy white gas of dry ice, which is harmless, to the gas ejection tube 3. The gas forced into the gas ejection pipe 3 is ejected from the gas ejection nozzle 2 of the gas ejection pipe 3 toward a suction pipe 4 spaced a predetermined distance below. At this time, if the suction pipe 4 is being suctioned by the suction device 7, the ejected gas will be sucked into the suction port 8 of the suction pipe 4. In this way, the gas ejected from the gas ejection pipe 3 is sucked into the suction pipe 4, so that a projection screen 5 of a flat cloudy gas curtain of dry ice is formed between the gas ejection pipe 3 and the suction pipe 4. will be formed.

Therefore, by changing the gas pressure sent to the gas ejection pipe 3 and arbitrarily setting the distance between the gas ejection pipe 3 and the suction pipe 4, the size of the screen 5 can be arbitrarily determined.

Further, since the projection screen 5 is formed of a harmless whitish-colored gas such as dry ice, post-processing of the screen 5 is not necessary, and the screen 5 can be easily handled. Therefore, as long as the gas ejection pipe 3 and suction pipe 4 are installed,
The gas curtain projection screen 5 can be easily formed anywhere.

Furthermore, cloudy gas such as dry ice is leaking from the gas jet pipe 3.
The gas is ejected along the longitudinal direction to form a gas screen projection screen 5, so that the screen 5 is uniformly cloudy in color.

Further, as shown in FIG. 2, when air is forced into the air jet pipe 9 at a predetermined pressure, the forced air is jetted downward from the air jet nozzle 10 of the air jet pipe 9, and the air curtain 11 is will be formed. For this reason, since the air ejection pipes 9 are arranged parallel to each other at the same interval so as to sandwich the gas ejection pipe 3, the gas curtain projection screen 5 is formed by the gas ejection pipe 3 and the suction pipe 4. Since an air curtain 11 is formed that flows along the front and back surfaces of the screen 5, diffusion of gas on the front and back surfaces is prevented, and the screen 5 is formed with a more even layer thickness of the gas curtain. .

The gas curtain formed as described above becomes a suitable projection screen 5 on which an image can be projected from a projection means 12 located at a distance and at a suitable position. Further, since the gas curtain projection screen 5 is formed to have a uniform cloudy color, the image projected on the screen 5-h is clearly projected, and the image can be clearly viewed from other than the front.

Therefore, the audience can watch the video, and the audio required to accompany the video can be played from speakers installed in the theater, making it possible to create a theater with a different taste. In addition, since this device can be constructed by simply arranging the gas ejection pipe 3 and the suction pipe 4, it can be simply installed on an indoor theater, etc., and by ejecting and suctioning gas, the projection screen can be created or deleted instantly, making it possible to create indoor theaters with different tastes.

In this embodiment, a case has been described in which a gas curtain projection screen is formed by ejecting gas from above to below. It is sufficient to form a curtain projection screen, and the arrangement of the gas ejection pipe and the suction pipe does not matter. For example, the gas ejection pipe and the suction pipe are placed upright and facing each other, and one gas ejection pipe is connected to the other suction pipe. Gas may be ejected and its residue drawn into a suction pipe to form a gas curtain projection screen.

In addition, air ejection pipes are provided to sandwich the gas ejection pipe, and an air curtain is formed along the front and back surfaces of the formed gas curtain projection screen, but the gas ejection pipe and the suction pipe are When the separation distance is small or when the suction pressure of the suction pipe is sufficiently high, a uniform gas curtain will be obtained between the gas jet pipe and the suction pipe, so there is no need to provide an air jet pipe that forms an air curtain. .

[Effects of the Invention] In short, according to the present invention, a gas ejection pipe and a suction pipe are provided facing each other with a predetermined distance apart from each other, and cloudy white gas such as dry ice is ejected from the waste ejection pipe and sucked. Since the projection screen was created using a gas curtain between the tubes, there was no need for post-processing of the screen, making it easier to scoop out the screen and forming a uniform screen. It has a great effect.

[Brief explanation of the drawing]

FIG. 1 is a conceptual explanatory diagram of the present invention, and FIG. 2 is a conceptual diagram of the arrangement of a gas jet pipe and an air jet pipe and the formed gas curtain according to the present invention. In the figure, 2 is a gas ejection nozzle, 3 is a gas ejection pipe, 4 is a suction pipe, and 5 is a projection screen.

Claims (1)

[Claims] 1. A gas ejection pipe having a gas ejection nozzle that ejects a cloudy-colored gas using dry ice, etc., and a gas curtain installed between these, which is installed opposite to the gas ejection pipe and sucks the ejected gas. A projection screen forming device comprising: a suction pipe for forming a projection screen.