JP4697863B2 - Acoustic reflector device - Google Patents

Description

  The present invention relates to an acoustic reflector apparatus, and more particularly to an improvement of a movable acoustic reflector apparatus provided on a theater stage or the like.

  In recent years, theaters and halls have a tendency to increase the size of the building itself so that it can be used for multiple purposes, and the trend is also to increase the size of movable acoustic reflectors installed on the stage. On the other hand, for example, as disclosed in Patent Document 1, it is possible to select a case where a large acoustic space appears and a case where a small acoustic space appears in this type of acoustic reflector apparatus. There is a suggestion to do.

  That is, the acoustic reflector apparatus disclosed in Patent Document 1 can reveal a small acoustic space when the front structure disposed on the front side, which is the audience seat side of the stage, is used exclusively. It is said that a large acoustic space can be revealed when used in combination with the back side structure that is distributed on the back side of the stage.

By the way, in this proposal, the front side structure includes a side reflector that is swingably held on the front wall of the stage, and a ceiling reflector and a front reflector that are suspended up and down above the stage. The back side structure has a front reflector that can be moved up and down on the back wall of the stage via a link mechanism, a ceiling reflector that can be raised and lowered on the front reflector, and can swing And a side reflector that is held on the surface.
Japanese Patent Laid-Open No. 11-1410112 (Claims Claims 1, paragraphs 0010, 0015 to 0018, 0049, 0053, FIGS. 2 and 3)

  However, in the acoustic reflector apparatus disclosed in Patent Document 1 described above, there is a fear that it may be pointed out that a so-called dead space appears in a portion near the back wall of the stage.

  That is, the back side structure in the above proposal has a side reflection plate and a ceiling reflection plate as the front reflection plate held on the back wall of the stage through the link mechanism. Aside from the reflector, the ceiling reflector is stored next to the front reflector in a position along the inner wall, that is, the ceiling reflector is superimposed on the front reflector.

  Therefore, when the above-mentioned back side structure is not in use, it will protrude from the back wall of the stage toward the audience side, and accordingly, around this back side structure, that is, for example, the back A dead space will appear in the stage part below the side structure.

  The present invention was created in view of the above-described circumstances, and the object of the invention is to bring out a desired acoustic space, but a dead space appears on the stage when not in use. It is an object of the present invention to provide an acoustic reflector device that is optimal for expecting improvement in its versatility.

In order to achieve the above-mentioned object, the means of the present invention includes a ceiling reflector plate that is hangable up and down above the front side of the stage, which is the audience side, and a vertical state that is hung down from the back side of the stage. A fixed front reflection in the lower half of the front side facing the audience seat, with a back side structure that can be erected at any position from the back side of the stage toward the audience side when descending a plate portion, constituted by a raise or inclined reflector portion of the upper front half, and is characterized by being set in the ceiling reflector portion capable undulations half side on the inclined reflector unit Is.

  More specifically, the back side structure has a side reflector formed under the folding structure on both side ends so as to be swingable, or is movable at both ends on the back side of the stage. Suppose that the side reflecting plate is adjacent to the back side structure.

  In addition, the side reflector near the ceiling reflector that descends from the upper front of the stage is held swingably on the front wall of the stage, or can be moved on both sides of the stage near the front of the stage. Suppose that

  In addition, an elevating proscenium hangs under the suspension structure on both sides above the front side of the stage, and a ceiling reflector above the front side of the stage crosses the elevating proscenium and moves to the front side of the stage when the elevating proscenium descends. Suppose that it is lowered.

  Therefore, in the present invention, the ceiling reflector and the rear structure are suspended above the stage, so that they are placed above the stage when not in use and a dead space appears on the stage. I will not let you.

  When the back reflector is lowered while the back structure is lowered and is placed near the front of the stage, the back reflector becomes a front reflector facing the audience seat, and the ceiling reflector In other words, the smallest acoustic space will appear.

In addition, while maintaining the state in which the ceiling reflector is lowered, the back side structure on the stage is set back by being moved back to the substantially central portion of the stage , and then the entire inclined reflector is tilted and tilted. Thus, it becomes possible to make a slanted front reflector appear at the upper end of the fixed front reflector part consisting of the lower half side, so that it is a medium-sized sound that is wider than the above-mentioned small acoustic space together with the ceiling reflector. Space can appear .
And, of course, the ceiling reflector is kept in the lowered state, but the entire tilt reflector is raised while the back side structure on the stage is further retracted to the back side of the stage. Tilt and tilt the ceiling reflector on the upper half of the tilted reflector so that it can be used as a ceiling reflector that is continuous with the ceiling reflector on the front of the stage. In this case, the largest acoustic space that is wider than the medium acoustic space can be displayed.
As a result, according to the present invention, the dead space does not appear in the stage part when not in use, and an acoustic space of a large, medium, and small size can appear, and an improvement in its versatility can be expected. become.

  The present invention will be described below on the basis of the illustrated embodiment. As shown in FIG. 1, the acoustic reflector device according to the present invention is used for a stage S in a theater on the right side in the figure when not in use. The ceiling reflector 1 that hangs down above the audience seat G side, that is, the front side of the stage S, and the back that hangs down along the back wall S1 of the stage S on the back side of the stage S on the left side in the figure And a side structure 2.

  As described above, according to the present invention, when the acoustic reflector device is not used, the ceiling reflector 1 and the back structure 2 constituting the acoustic reflector device are suspended above the stage S. Therefore, in particular, effective use on the stage S below the back side structure 2 is enabled, that is, no dead space appears around the acoustic reflector device.

  By the way, the ceiling reflector 1 and the rear structure 2 are formed from a winch or the like (not shown) that is arranged on a cage frame 3 that is a support frame arranged so as to be adjacent to a stage ceiling (not shown) above the stage S from below. It can be lifted by being suspended by appropriate lifting means.

  Therefore, in this acoustic reflector device, the ceiling reflector 1 and the back-side component 2 can be raised and lowered by appropriate control with respect to the lifting and lowering means. The posture change from the state to the substantially horizontal state and the opposite posture change can be realized, respectively. Further, in the back side structure 2, the back side of the stage S on the floor S2 of the stage S when it descends In addition, it is possible to realize standing up to an arbitrary position toward the head and to realize undulation of each part described later.

  Incidentally, as shown in the figure, an elevating proscenium 4 is arranged so as to fill a so-called space (not shown) appearing between the ceiling G1 of the acoustic reflector plate above the audience seat G and the stage S. As a result, the lifting / lowering proscenium 4 is also lifted / lowered by lifting / lowering means such as a winch (not shown) disposed in the above-described cage 3.

  Further, although not shown in the drawing, the main task of the kite 3 is to suspend a so-called baton device. At this time, the baton device suspends a number of batons so that they can be raised and lowered, and is held by the batons. It is supposed that lighting equipment and sound equipment are moved up and down above the stage S.

  And about the structure of the ceiling reflector 1 and the back side structure 2, arbitrary structures can be employ | adopted as long as a predetermined | prescribed acoustic effect is exhibited, for example, although not shown in figure, in order to enable weight reduction, it is a frame structure. The formed main body is formed by spreading a thin steel plate or sheet that easily obtains an acoustic effect.

  On the other hand, when the ceiling reflector 1 is not in use, the ceiling reflector 1 is lifted in a position adjacent to the above-mentioned cage 3 from below. At this time, in the present invention, the ceiling reflector 1 is located above the elevating proscenium 4 described above. To be positioned.

  The ceiling reflector 1 is lowered to a predetermined position when in use. At this time, the ceiling reflector 1 is lowered in such a manner that the ceiling reflector 1 is exchanged so as not to interfere with the elevation prosthenium 4.

  Therefore, in this invention, first, the lifting / lowering proscenium 4 is suspended at both ends along the frontage direction of the stage S, and the ceiling reflector 1 interferes with the lifting / lowering proscenium 4 above the lifting / lowering proscenium 4. It is supposed that it can move in the direction crossing this lifting / lowering proscenium 4 without.

  Next, when the ceiling reflector 1 is used, it is assumed that the ceiling reflector 1 is lowered so as to cross the above-mentioned lifting and lowering proscenium 4. Therefore, the traction member 11 that suspends the ceiling reflector 1 is moved up and down by the arm 12 that moves up and down. It is moved in the left direction, that is, moved so as to be pushed toward the back wall S1 of the stage S.

  Incidentally, the above-described ceiling reflector 1 is suspended by being connected to one end of the pulling member 11, and is also suspended by being connected to an intermediate portion of another pulling member 13. It is assumed that the ceiling reflector 1 is placed in a use state in which the ceiling reflector 1 is in a substantially horizontal state due to the tension of the member 13 (see the solid line diagram).

  The ceiling reflector 1 is replaced with a so-called high position shown by a solid line in the figure depending on the use situation, that is, when it is required to present a considerably small acoustic space. Thus, it may be used at a so-called low position shown by a virtual diagram in the figure.

The back side structure 2 includes a front lower half fixed front reflector 21 facing the seat G and a front upper half undulating inclined reflector 22, and this inclined reflector 2. The upper half side of 22 is set to the ceiling reflecting plate part 23 that can be raised and lowered.

  And this back side structure 2 is hung by the same posture as the above-mentioned elevating proscenium 4, that is, it is hung at both ends along the frontage direction of the stage S, and this back side structure 2 When standing on the floor S2 of the stage S at an arbitrary position from the back side of the stage S toward the audience seat G side, consideration is given so as to avoid the interference with the baton device described above.

  In addition, the back side structure 2 is suspended by a plurality of pulling members 25 and 26 wound in a V-shape on a pulley 24 held at the upper end thereof. Depending on the priority of the tension in the pulling members 25 and 26, it becomes possible to select the standing position on the floor S2 of the stage S of the back structure 2.

  By forming the back side structure 2 as described above, in this acoustic reflector apparatus, together with the ceiling reflector 1 described above, a large, medium and small acoustic space having a desired size is formed as follows. Can appear.

  That is, first, when the ceiling reflector 1 is lowered and placed in a substantially horizontal state, and when the back side structural body 2 is lowered and is erected near the front side of the stage S, the back side structural body 2 is in the passenger seat G. It becomes a front reflector opposite to the ceiling reflector 1, so that the smallest acoustic space appears together with the ceiling reflector 1.

And while maintaining the ceiling reflector 1 in the said substantially horizontal state, on the floor S2 of the stage S, the back side structure 2 is made to stand up so that it may reverse | retreat to the approximate center part of the stage S, and an inclined reflector By tilting the entire portion 22 and inclining it, an oblique front reflector appears at the upper end of the fixed front reflector 21 composed of the lower half, and together with the ceiling reflector 1, the above small acoustic space A large, medium-sized acoustic space will appear.
And, of course, the ceiling reflector 1 is maintained in the above-mentioned substantially horizontal state, but it is erected so that the back side structure 2 is further retracted to the back side of the stage S on the floor S2 of the stage S. On the other hand, the entire tilted reflector 22 is tilted and tilted, and then the ceiling reflector 23 on the upper half of the tilted reflector 22 is tilted to tilt the ceiling reflector 23. It can be used as a ceiling reflector that is continuous with the ceiling reflector 1 on the front side of S, and at this time, the largest acoustic space that is wider than the medium acoustic space described above appears.
As described above, by positioning the ceiling reflector 1 and transforming the back side structure 2, an acoustic space of a desired size that is large, medium, and small can be revealed. By using the side reflectors 5, 6, and 7 together with 1 and the back side structure 2, an acoustic space that is substantially large, medium, and small can be revealed.

  As long as an acoustic space that is substantially large, medium, and small can be revealed, the side reflectors 5, 6, and 7 can be formed in a free configuration, but a free configuration can be selected for the distribution mode. .

  That is, the side reflector 5 when forming the smallest acoustic space together with the ceiling reflector 1 is, for example, held swingably on the front wall of the stage S, or adjacent to the front of the stage S. It may be movably equipped on a so-called sleeve or the like on both sides of the stage S.

  Further, the side reflectors 6 and 7 when the medium acoustic space appears and when the largest acoustic space appears are formed, for example, under the folded structure on both side ends of the back structure 2. It may be held so as to be able to swing, or may be movably equipped on so-called sleeves or the like at both ends of the stage S.

It is a schematic longitudinal cross-sectional view which shows the acoustic reflector apparatus by this invention in a non-use state and a use state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ceiling reflector 2 Back side structure 4 Elevation proscenium 5, 6, 7 Side reflector 21 Fixed front reflector part 22 Inclined reflector part 23 Ceiling reflector part G Guest seat S Stage S2 Floor

Claims (4)

A ceiling reflector that can be moved up and down above the front side of the stage, which is the audience side, and a vertical reflector that is hung from the back side of the stage and moved up and down in the vertical state. A fixed front reflector plate in the lower half of the front side facing the passenger seat, and an inclined reflector plate that can be raised and lowered in the upper half of the front side And an upper part of the inclined reflecting plate part is set as a undulating ceiling reflecting plate part. The back side structure has a side reflector formed under the folding structure on both side ends so that it can swing, or a side reflector that can be moved at both ends on the back side of the stage The acoustic reflector apparatus according to claim 1, wherein the acoustic reflector apparatus is adjacent to a body. Side reflectors close to the ceiling reflector descending from above the front of the stage are held swingably on the front wall of the stage, or can be moved on both sides of the stage near the front of the stage The acoustic reflector apparatus according to claim 1. An elevating proscenium is suspended under the suspension structure on both sides above the front side of the stage, and a ceiling reflector above the front side of the stage is lowered to the front side of the stage across the elevating proscenium when the elevating proscenium is lowered. The acoustic reflector apparatus according to claim 1.

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