JP4644525B2 - 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-described object, the structure of the acoustic reflector device according to the present invention basically includes a ceiling reflector that is suspended above the front side of the stage serving as the audience seat, and a rear side of the stage. And a back side structure that is selectively erected at a position close to the back side of the stage and a position near the seat side of the stage when descending, and the back side structure faces the seat A reflection plate portion, and a ceiling reflection plate portion that is held above the front reflection plate portion and can be raised and lowered toward the floor of the stage. Assume that it is possible to stand at a position closer to the audience seat on the stage than above.

  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 this elevating proscenium 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.

  Then, while the ceiling reflector is lowered, the back side structure is lowered and is erected at a substantially central portion of the stage, and the front reflector of the back side structure is rocked so that the link member falls. When placed in a state of moving forward toward the passenger seat by movement, the front reflector plate becomes a front reflector facing the passenger seat, and together with the ceiling reflector, the smallest acoustic space appears.

  In addition, while maintaining the state in which the ceiling reflector is lowered, the link member is raised in the inner structure, and the front reflector is returned to the old shape, that is, it is erected at a predetermined position. When the state is set, this back side structure becomes the front reflector as it is, and an intermediate acoustic space can be revealed together with the previous ceiling reflector.

And, of course, the ceiling reflector is kept in a lowered state, but the rear structure is set up so as to recede to the back side of the stage, and the ceiling in the rear structure is By tilting the reflector toward the floor of the stage, this ceiling reflector can be connected to the previous ceiling reflector. At this time, the front reflector is directly used as the front reflector. Thus, the largest acoustic space can be revealed.
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.

  In addition, when it is required to reveal this small acoustic space, instead of the above-described lowering of the entire ceiling reflector 1, it is also shown in a virtual diagram in the figure, but only the reflector 14 is shown. Of course, it may be lowered.

  The back-side structure 2 has a front reflector 21 that faces the seat G while forming most of the front side, and is held above the front reflector 21 and undulates toward the floor S2 of the stage S. The ceiling reflector 22 is made possible, and the front reflector 21 can be erected at a position closer to the audience seat G side of the stage S than the above in the presence of the link member 23. It is going to be.

  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, while the ceiling reflector 1 is lowered, the back-side structure 2 is lowered and is erected at the substantially central portion of the stage S, and the front reflector 21 of the back-side structure 2 is linked. The front reflector 21 becomes a front reflector facing the passenger seat G by swinging the member 23 so as to fall down, and is the smallest with the ceiling reflector 1. Make the acoustic space appear.

  In addition, while maintaining the state in which the ceiling reflector 1 is lowered, the front reflector plate 21 is returned to the old state by raising the link member 23 in the inner structure 2, that is, at a predetermined position. In this state, the back side structure 2 becomes a front reflector as it is, and, together with the ceiling reflector 1, the medium-sized acoustic space appears.

In addition, of course, the ceiling reflector 1 is maintained in the lowered state, but the back side structure 2 is set up so as to be retracted to the back side of the stage S, and this back side structure is also provided. By tilting the ceiling reflector 22 in the body 2 toward the floor S2 of the stage S, the ceiling reflector 22 can be continued to the previous ceiling reflector 1, and at this time, the front The reflecting plate portion 21 is used as it is as a front reflecting plate, and the largest acoustic space 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 reflectors 5 and 6 when forming the smallest acoustic space and the medium acoustic space together with the ceiling reflector 1 are, for example, held swingably on the front wall of the stage S, or Further, it may be provided so as to be movable on so-called sleeves that are both sides of the stage S adjacent to the front of the stage S.

  On the other hand, with respect to the side reflector 7 in the case where the largest acoustic space appears, for example, the side reflector 7 is formed on both side ends of the back side structure 2 under the folding structure and held so as to be swingable, or It is good also as movably equipped with what is called a sleeve part etc. which are the both ends of S back side.

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 Elevating proscenium 5, 6, 7 Side reflector 21 Front reflector part 22 Ceiling reflector part 23 Link member G Passenger seat S Stage S2 Floor

Claims (4)

A ceiling reflector that hangs above the front side of the stage, which is the audience side, and a vertical position that hangs down on the back side of the stage and moves to the back side of the stage and a position close to the audience side of the stage when descending And a backside structure that has a front reflector that faces the audience seat, and is held above this front reflector and undulates toward the floor of the stage. It is possible to have a ceiling reflecting plate portion, and the front reflecting plate portion can be erected at a position closer to the audience seat side of the stage than the above in the presence of the link member. Acoustic reflector device 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 ends above the front side of the stage, and when the elevating proscenium is lowered, the ceiling reflector above the front side of the stage is lowered to the front side of the stage across the elevating proscenium. The acoustic reflector apparatus according to claim 1

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