JP5417677B2 - Assembled spherical screen - Google Patents

Description

  The present invention is an assembled spherical screen capable of projecting a photographed image or a computer graphics image on both the inside and outside of a spherical surface. The assembled spherical screen can be assembled before use, and can be carried after assembly. The present invention relates to an assembled spherical screen for storing and saving space.

Conventional spherical screens (Patent Documents 1 to 5) are large and fixed, but there are some which are made small in order to save space. There is also a dome as a creation, not as a spherical screen. Until now, it has been made of wooden and bamboo frames. (For example, there is a hemispherical dome composed of polyhedrons of 6 regular pentagons, 10 equilateral triangles, 30 isosceles triangles (A), 30 isosceles triangles (B). See.)
Patent No. 2916142 JP-A-6-148563 JP 2002-14611 JP 10-1111534 A Special table 2000-510206 Stardome homepage http: // www. stardome. jp

  The conventional spherical screen described above is generally large and difficult to move even if it is reduced in size, and is not an assembly type but an installation type. In addition, there is only a method of performing projection only on one side inside the spherical surface or outside the spherical surface.

  The present invention is intended to solve the above problems, and is intended to be easy to move, does not take up space during storage, saves space, and projects onto both the inside and outside of a spherical surface. is there.

  In order to achieve the above object, the present invention includes a spherical screen combined with a polygonal sheet and a single strut set that can be bent when a force is applied, or a plurality of struts that can be joined. A set and a belt-like bag that can be inserted from both ends or from the center and passed through are attached to the screen, and the post is fixed to the end of the belt-like bag so that the screen has a spherical curve. A fixing device that can be used is attached.

  In order to achieve the above object, the present invention uses a white and translucent material for the sheet.

  The operation of the first problem solving means is as follows. That is, a spherical screen can be formed by joining a support, passing it through a belt-like bag attached to the screen, and fixing the end while applying tension. Also, the storage space can be reduced by disassembling the assembled spherical screen, folding the seat, and dividing the joined struts. In addition, since the structure is simple, for example, cloth or vinyl is used as the material for the sheet, plastic (such as a horticultural pole) is used as the material for the column, and the overall weight is relatively light, making it easy to carry. be able to.

The operation of the second problem solving means is as follows. That is, by using the semi-transparent material in white the sheet can be projected inside of the sphere surface, an image on both sides of the outer.

  As described above, the assembled spherical screen of the present invention can be moved while maintaining its spherical shape when it is used by reducing the weight, and the storage space can be reduced by folding it when it is disassembled.

As described above, prefabricated spherical screen of the present invention, the inner sphere surface, by projecting an image on both surfaces of the outer, the inner spherical, for example, or can view the live-action video-held realistic It can be used as a planetarium, or from the outside of a spherical surface, for example, as a globe.

By viewing the image from the inside of the spherical screen, it is possible to have an effect (a sense of reality) as if the observer is still there. This is related to the size of the projected image.
In addition, the image displayed on the spherical screen covers the viewer's field of view and has a wide angle that requires moving the eyes and head to capture the entire image. You can experience it (immersive feeling). This is related to the viewing angle of the projected image.

  As an example, a spherical screen can alternatively be used as a planetarium in a city area where there are many night lights in the vicinity of the observation, even if it is difficult to observe the starry sky or even if it is not observed using a planetarium facility.

  For example, by projecting landscape images of nature and cities around the world, you can have a simulated experience of being in that place. As an example, a three-dimensional structure can be understood by projecting a real object such as a building or a virtual model as an image.

  For example, it can be used as a globe by projecting satellite images while adjusting the position so that the position is accurately displayed on the spherical surface. In this case, compared with the conventional globe, there is no deterioration of the digital image as the display object, and the reproducibility is excellent. In addition, it is easy to edit. In this case, it is possible to mark on the globe and insert various images such as atmospheric circulation, ocean currents, earthquake and tsunami propagation, etc. It can be used.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

In the figure, reference numeral 1 denotes a sheet for projecting an image as a spherical screen.
A white and translucent sheet is used to enable viewing of images from both the inside and outside of the spherical screen. Examples include white cloth, translucent polyethylene sheet, Japanese paper, and imitation paper. However, in use, it is necessary that the thickness of these sheets be strong enough to withstand the tension of the column. On the other hand, if the sheet is too thick, the spherical surface cannot be formed well even if the column is bent. Use a moderately thick sheet to form the spherical surface.

Reference numeral 2 denotes a pair of struts that can bend when a force is applied, or a pair of struts that can be joined. The strut is divided into a hemisphere upper part and a base part. Since the bottom support column is circular when assembled, at least one seam is required. When projecting an image, it is desirable that the support column be transparent and easily transmit light. An example of the material of the support is plastic (such as a gardening pole). For example, the cross section of the column may be a circle or a rectangle. Further, as an example, there are cases where two or three struts are joined to form the entire length. When joining together, the pipe (3) is attached to the end of one of the columns. The tube shall be matched to the shape of the column. Examples include circles and rectangles. The tube shall not bend easily when force is applied. Moreover, if the width of the tube is the same as the width of the support column, it is difficult to connect and it is difficult to use. Also, if it is too large, it is difficult to fix and a curve for the spherical surface of the screen cannot be made. It shall have a slight clearance that does not hinder assembly. In the case of joining the above, for example, there is a use in which struts are connected with an elastic string (rubber string or the like) and folded.
To avoid damaging the belt-like bag during use, do not sharpen both ends of the column. As an example, it is conceivable to attach a cap so that both ends pass smoothly through a belt-like bag. As an example of a method for fixing the columns to each other, there is a case where the columns are passed through a belt-like bag and fixed by a fixing tool. Further, as an example, there is a case in which a hemisphere upper support and a bottom support are fixed with a thumbscrew or the like.

Reference numeral 4 denotes a belt-like bag through which a support is passed. The support can be passed from both ends and the center. The band-shaped bag is divided into a hemispherical upper part and a bottom part. The belt-like bags at the top of the hemisphere have the role of a guide that makes a three-dimensional intersection and makes it easier for the struts to intersect. The end of the belt-like bag at the top of the hemisphere may be longer for fixation. For example, the belt-like bag may be attached outside the spherical surface or attached inside the spherical surface. When projecting an image, the belt is preferably white or transparent.
Necessary conditions for the belt-like bag are that it is larger than the width of the column, and there is no obstacle on the wall or inside of the belt-like bag so that the column can pass smoothly. That is. Further, as an example, a case where a guide made of a material having a small friction coefficient is attached in order to smoothly pass the column. Further, in order to protect the belt-like bag, there may be a case where a protective sheet is attached to the inner surface of the end of the belt-like bag so that the support can pass smoothly. Moreover, the case where one side is closed among the both ends of a hemispherical upper belt-like bag as an example can be considered. A three-dimensional intersection is provided at the portion of the belt-like bag where the struts intersect. It is necessary that the material does not bend easily and has a role of a guide that can bend so that the support can pass smoothly. For example, the same material as the band-shaped bag or a different material may be used for this part.

Reference numerals 5 and 6 denote fixtures attached near the end of the belt-like bag.
To apply tension to the spherical screen, pull the tip of the belt-like bag on the top of the hemisphere attached to the sheet, fix it with a fixture, and apply tension evenly. As an example, there is a method of fixing the end of a belt-like bag through a belt stopper or the like as in 5. As an example, there is a method in which a hook or the like is attached to the outside of the end of the belt-like bag, and a receiving metal fitting such as the hook is attached to the outside from the center of the belt-like bag. As an example, there is a method of attaching and fixing a velcro tape or the like to the outside of the end of the belt-like bag and the outside from the center of the belt-like bag. As an example, there is a method in which a snap or the like is attached and fixed to the outside outside the belt-like bag and the outside from the center of the belt-like bag. As an example, there is a method in which an elastic string (rubber string or the like) is attached to the outside of the end of the belt-like bag, and a hook or the like is attached to the outside from the center of the belt-like bag. As an example, there is a method in which a ring or the like is attached to the outside of the end of the belt-like bag, and a protruding metal fitting or the like is attached to the outside from the center of the belt-like bag. As an example, there is a method in which a metal fitting such as a thumbscrew is attached and fixed to the outside outside the belt-like bag and the outside from the center of the belt-like bag. In addition, as shown in FIG. 6, without using a belt-like bag or the like for fixing, a tube is attached to both ends of the column, and a pin (6) is attached to the bottom side (sheet, etc.) of the spherical screen to give tension to the column. There is also. In this case, the direction of the pin etc. can be changed, and the strength and length of the pin etc. are such that the tube does not easily come off from the pin etc. when tension is applied to the post, and the pin etc. can be easily seated It is necessary to have a bonding strength between the sheet or the like and the pin or the like that cannot be removed from the sheet.
Further, in each of the above-described fixing methods, there is a method of exchanging the position of the fixing tool.
As an example, there is a method of attaching and fixing one belt and a metal fitting or the like between the belt-like bags instead of the plurality of belt metal fittings shown in FIG. The belt needs to be wide enough to stop a plurality of struts and strong enough to fix the struts.
Further, as an example, instead of the plurality of belt brackets shown in FIG. 5, a plurality of strut supports having a width are attached between the belt-like bags, and further, a plurality of fixing tools and a sheet or the like are attached to the support. There is also a method of fixing the support column by attaching the same number of fixtures to the fixture. The abutment tool needs to be wide enough to hold a plurality of struts and strong enough to fix the struts. Examples of the abutment tool include canvas and plastic.
When projecting an image, it is desirable that the one having a large area, such as a patch, be white or transparent.

  In order to construct an ideal spherical screen when the column is bent, the column material and width, the amount of tension required, and the sheet material and thickness are interrelated. These conditions necessary for the entire structure are determined comprehensively while adjusting the strength of each part.

The operation of the above configuration will be described below. A spherical surface of the screen is formed by passing a support through a belt-like bag attached to the screen, fixing both ends, and applying tension. Then, the height is adjusted by using a plurality of stands, and it is used as a spherical screen. Moreover, the storage space can be reduced by disassembling into one sheet and a short support.
Strictly speaking, the screen is composed of a polyhedron, but it can be used as a screen regarded as a sphere.
Since the folded sheet is tensioned when assembled, it functions as a spherical screen. In addition, the sheet can be temporarily uneven when pressed by hand, but when it is used, it does not apply any force other than tension or fixing force by a stand.

As an example at the time of assembly, when it is not necessary to connect the support columns, first, the support columns are inserted from either end of the belt-like bag so that the support columns protrude from both ends.
Also, if you need to connect multiple struts, for example, insert struts from either end of the strip bag so that the equal number of struts in each strip bag is inserted, Make it come out. In this case, if the column is a type in which the columns are joined at the center, a method of joining the columns, which are the respective parts, from the windows at the both ends or the center of the belt-like bag in advance and then joining them at the center can be considered.

  After all the struts have passed, the struts automatically cross each other at the intersection provided in the belt-like bag.

  Next, the support column protruding from the belt-like bag is pushed into the belt-like bag and fixed with a fixture. And it adjusts so that tension may become equal.

  The support for the bottom frame is inserted from the hole in the bottom of the sheet and passed through a belt-like bag attached to the bottom. Connect the struts together in a belt-like bag.

  The spherical screen thus assembled is fixed with three or more stands. Adjust the height according to the type of projection device. An image is adjusted so as to be projected onto a spherical screen according to the type of the projection device. As an example, the center of the hemisphere is the eye height, and the position is fixed with a plurality of stands. As an example of the stand, the one having an adjustable height (clips with springs, screw fittings (plastic, wooden, etc.)) that can adjust the height and does not damage the seat is used.

In the case of a projection method using a combination of a convex mirror and a liquid crystal projector in Japanese Patent No. 2991642 (all-round spherical screen projection device), a fixed axis is placed in a diametric direction at a position lower than the center, and the convex mirror is placed inside the spherical screen. Therefore, the liquid crystal projector is fixed on the opposite side of the convex mirror near the center. Note that the height of the fixed axis, the convex mirror, and the position of the liquid crystal projector are adjusted so that an image can be projected on a spherical surface over a wide range.
Therefore, in this case, it is assumed that a plurality of observers are positioned away from the projection apparatus.

  In the case of a projection apparatus using a fish-eye lens as seen in Japanese Patent Application Laid-Open No. 2002-14611 (video projection method and apparatus for planetarium or spherical screen), the lens is located at the center, and light is emitted radially from the center. Therefore, in this case, it is assumed that a plurality of observers are located outside below the position of the central lens.

  As an example of image projection, there is a case where a celestial sphere image is projected inside a spherical screen and used as a planetarium. In addition, by projecting a landscape image, there are uses that give the impression of walking around the city and looking at the streets, or being in a place surrounded by mountains and the sea. In addition, the use of observing the celestial bodies (sun, moon, earth, etc.) as spheres in three dimensions using photographs of the surface of the sun and moon, photographs taken by artificial satellites, etc. is there. When using a convex mirror and a liquid crystal projector, the projection method differs depending on the projection device, such as predistorting the original image. Also, use a liquid crystal projector with sufficient light intensity so that it can be sufficiently observed when the room is darkened and the light emitted from the liquid crystal projector is projected onto a spherical surface.

It is a perspective view which shows a spherical screen main body. It is a front view which shows a support | pillar. It is a perspective view which shows the support | pillar which let the strip | belt-shaped bag attached to the spherical screen main body, and the strip | belt-shaped bag pass. It is a perspective view which shows an example of the fixing tool attached to the strip | belt-shaped bag. It is a figure which shows an example of fixation of a support | pillar with the fixing tool attached to the strip | belt-shaped bag. It is a figure which shows an example of fixation of a support | pillar which does not use a strip | belt-shaped bag etc. for fixation.

1 Sheet 2 Strut 3 Tube 4 Band-shaped Bag 5 Fixing Tool (Belt Hardware)
6 Fixing device (pin)

Claims (2)

A spherical screen in which polygonal sheets are stitched together, a set of struts that can bend when a force is applied, a belt-like bag provided on the spherical screen, through which the struts can be inserted from both ends, and the spherical screen An assembled spherical screen, comprising: a fixture for fixing the post to the end of the belt-shaped bag so that a spherical curve is formed . The belt-like bag has a structure in which the support column can be inserted and passed from both ends as well as from the center, and the sheet uses a white and translucent material. it is, prefabricated spherical screen according to claim 1, characterized in that it is the image projected on both sides of the inner, outer side of the ball surface.

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