JP3686200B2 - Stage acoustic reflector device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a stage acoustic reflector apparatus.
[0002]
[Prior art]
FIG. 3 is a longitudinal sectional view of a stage provided with a conventional acoustic reflector apparatus. In the figure, 101 is a stage, 102 is a ceiling part of the stage, 103a and 103b are acoustic reflector storage parts provided on the ceiling part, and 104a and 104b indicated by solid lines are stored in the storage part. It is an acoustic reflector. Each acoustic reflector is suspended from the ceiling by a wire rope wound around a winder (not shown) and stored in a vertical state. Reference numerals 104a and 104b indicated by dotted lines indicate acoustic reflectors that are unwound and stretched obliquely by rewinding the wire rope. The acoustic reflector is spread by an electric stretcher (not shown) provided below the storage unit.
[0003]
[Problems to be solved by the invention]
In the conventional liftable acoustic reflector apparatus as described above, there are safety problems due to the presence of the relatively heavy acoustic reflectors 104a and 104b above the performers and workers on the stage 101 even in the stored state. In addition, since the acoustic reflector 104 itself is relatively thick, the ratio of the storage portions 103a and 103b occupying the ceiling portion 102 is large, which often causes a problem of interference with other hanging equipment, so as to increase the production effect. It was an obstacle.
[0004]
The present invention has been devised in order to eliminate the above-mentioned drawbacks of the prior art. The acoustic reflector is collectively stored in the upper part behind the stage to ensure safety on the stage. It is an object of the present invention to provide an acoustic reflector device that is preferable in terms of production effect, in which storage and expansion are automatically performed, and there are few interferences with other hanging equipment and many hanging objects can be installed.
[0005]
[Means for Solving the Problems]
The present invention solves the above-described problems, and relates to a stage acoustic reflector apparatus having the following characteristics.
[0006]
(1) Supported by the building frame and provided on both the left and right sides of the stage. The sides of the stage are curved at the center, the upper part of the curved part is vertical in the upper part at the back of the stage, and the lower part of the curved part is slightly forward in the upper part of the stage A pair of guide rails having a shape inclined obliquely upward, a plurality of acoustic reflectors whose edges are close to each other, a self-propelled wheel and a driven wheel provided on the side so as to roll along the guide rail, An acoustic reflector plate assembly, a winder that can be rotated forward and backward provided above a vertical portion of the guide rail, and the acoustic reflector plate assembly is moved up and down along the guide rail by the winder. When the acoustic reflector is not used, lift the acoustic reflector and store it between the vertical parts of the guide rails. When using the acoustic reflector, release the acoustic reflector and release both Spread between the inclined parts of the guide rail.
[0007]
(2) In the stage acoustic reflector apparatus according to (1), the end of the rope is attached to a coupling fitting connected to the acoustic reflector assembly by a hinge.
[0008]
(3) In the stage acoustic reflector apparatus described in (1) above, a counterweight is hung on the end of the rope connected to the acoustic reflector assembly after being wound around the rope drum of the winder. Has been lowered.
[0009]
(4) In the acoustic reflector apparatus for a stage according to the above items (1) to (3), the hoisting machine includes a drive unit capable of rotating forward and reverse, a drive shaft connected to the drive unit, and the drive shaft. A plurality of rope drums attached to the rope drum, pulleys corresponding to the respective rope drums, and counterweights suspended at the end of the rope, and a plurality of ropes corresponding to the plurality of rope drums. The assembly is raised and lowered.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a longitudinal sectional view of a stage provided with an acoustic reflector apparatus according to an embodiment of the present invention, and FIG. 2 is a perspective view of the apparatus. In the figure, 1 is a stage, 2 is a rear frame of the building, 3 is a pair of side frames provided on the left and right sides of the stage so as to protrude obliquely upward in front of the stage, 47 It is a guide rail supported by the building rear frame 2 and the side frame 3, and its cross section has a “U” shape forming an inward groove, and its side shape is curved at the center, and is almost “L”. "It has a letter shape.
[0011]
Reference numeral 30 denotes an acoustic reflector holding frame, and reference numerals 31, 32, and 33 denote acoustic reflectors attached to the acoustic reflector holding frame. 41 and 42 are wheels provided on the side of the holding frame and roll in the inward groove of the guide rail, 42 is a self-propelled wheel driven by a motor 45, and 41 is a driven wheel that freely rotates. It is. The acoustic reflector assembly is formed by the acoustic reflector holding frame 30, the acoustic reflectors 31, 32, 33, the wheels 41, 42, and the motor 45.
[0012]
Reference numeral 35 denotes a connection fitting, and 36 denotes a hinge that rotatably connects the connection fitting to the acoustic reflector holding frame 30. Reference numeral 29 denotes a plurality of wire ropes each having one end aligned and attached to one edge of the connection fitting 35.
[0013]
Reference numeral 21 denotes a drive unit for winding the wire rope provided on the saw 13 on the stage ceiling, which is composed of an electric guard motor that can rotate forward and reverse. Reference numeral 22 denotes a drive shaft that is rotationally driven by the drive unit, and reference numeral 23 denotes a wire rope drum that is fixed to the drive shaft and rotates together with the drive shaft. The wire rope drum is provided corresponding to each wire rope 29. 24 and 25 are pulleys whose shafts are fixed to the ceiling or the rear frame of the building, and are provided corresponding to the respective wire ropes 29. Reference numeral 27 denotes a fixed end of each wire rope 29, and 26 denotes a counterweight suspended from the hanging portion of the wire rope between the fixed end 27 of the wire rope and the pulley 25 via the pulley. Each wire rope 29 is wound around the corresponding wire rope drum 23 about twice. The hoisting machine 20 is constituted by the above 21, 22, 23, 24, 25, 26, 27.
[0014]
A in FIG. 1 is an acoustic reflector storage unit at the upper rear of the stage, and the acoustic reflector is stored in a vertical posture. B is an acoustic reflector extension region where the acoustic reflector is extended obliquely upward with respect to the front of the stage.
[0015]
In this apparatus, when the acoustic reflector is not used, the hoisting machine 20 is driven in the winding direction, and the acoustic reflector holding frame 30 is pulled up along the guide rail 47 by the wire rope 29, and the storage portion A of FIG. Store in. Since the acoustic reflectors 31, 32, and 33 are integrated with the frame 30, they are lifted and stored together. At the curved portion of the guide rail, the connecting bracket 35 is rotated at an appropriate angle with respect to the holding frame 30 by the action of the hinge 36, so that the holding frame 30 can be pulled up without difficulty. Since the counterweight 26 is suspended from the wire rope 29, the load on the drive unit of the hoisting machine 20 is reduced. The distance between the wheels 41 and 42 is set so as to exceed the curved portion of the guide rail 47. The holding frame 30 is smoothly moved by the action of the self-propelled wheel 42 on the lower end side.
[0016]
When using the acoustic reflectors 31, 32, and 33, the winder 20 is driven in the lowering direction, the acoustic reflector holding frame 30 is moved downward, and the direction is changed along the guide rail 47 to change the acoustic reflector. Move to the extension area B for extension. At this time, the holding frame 30 is smoothly moved by the action of the self-propelled wheels 42 in the inclined portion of the guide rail.
[0017]
In the acoustic reflector apparatus having the above configuration, the storage portion A for accommodating a plurality of sets of acoustic reflectors attached to the holding frame when not in use is formed vertically at the upper rear part of the stage, and is provided above the storage part A. The entire acoustic reflector is lifted and stored in the storage portion by a hoisting machine, and interference with other hanging objects such as a border light, a suspension light, and a scum curtain is minimized. In addition, safety against heavy falling objects on the stage is ensured. Further, the acoustic reflector descends by the release operation of the hoist along the substantially L-shaped guide rails provided on the left and right side frames of the building over the extending area B above the stage, and further, both sides of the acoustic reflector The self-propelled wheel and the driven wheel provided on the vehicle are automatically and quickly expanded in the expansion region B.
[0018]
【The invention's effect】
As described above, according to the stage raising / lowering acoustic reflector apparatus of the present invention, when not in use, the storage part for accommodating the acoustic reflector is formed vertically at the upper rear part of the stage, and the hoisting machine provided above the storage part Since the entire acoustic reflector is lifted and stored by using a large number of various suspensions that are effective for production while minimizing interference with other suspensions, it is safe against heavy falling objects on the stage. Sex is secured. When the acoustic reflector is used, it is lowered by the release operation of the hoist along the substantially L-shaped guide rails provided on the left and right frames of the building from the storage section to the extension area of the stage ceiling, and further the acoustic reflector The self-propelled wheels and the driven wheels provided on both sides of the wheel are automatically expanded in the expansion region, and there are remarkable effects such as saving labor.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a stage provided with an acoustic reflector apparatus according to an embodiment of the present invention.
FIG. 2 is a perspective view of the acoustic reflector apparatus.
FIG. 3 is a longitudinal sectional view of a stage provided with a conventional acoustic reflector device.
[Explanation of symbols]
A Storage part B Extension area 1 Stage 2 Building rear frame 3 Side frame 13 Saw 20 Lifter 21 Drive part 22 Drive shaft 23 Wire rope drum 24 Pulley 25 Pulley 26 Counterweight 27 Wire rope fixed end 29 Wire rope 30 Acoustic reflection Plate holding frame 31 Acoustic reflector 32 Acoustic reflector 33 Acoustic reflector 35 Coupling bracket 36 Hinge 41 Driven wheel 42 Self-propelled wheel 45 Motor 47 Guide rail

Claims (4)

It is supported by the building frame and is provided on both the left and right sides of the stage. A pair of guide rails having an inclined shape, a plurality of acoustic reflectors whose edges are close to each other, and a self-propelled wheel and a driven wheel provided on the side so as to roll along the guide rail An acoustic reflector assembly, a winder that can rotate forward and backward provided above the vertical portion of the guide rail, and a rope that moves the acoustic reflector assembly up and down along the guide rail by the winder. When not using the acoustic reflector, raise the acoustic reflector and store it between the vertical parts of both guide rails. When using the acoustic reflector, release the acoustic reflector and release both guides. Stage of the acoustic reflector apparatus, characterized in that the stretched during the inclined portion of the Lumpur. 2. The stage acoustic reflector apparatus according to claim 1, wherein an end of the rope is attached to a coupling fitting connected to the acoustic reflector assembly by a hinge. 2. The stage acoustic reflection according to claim 1, wherein a counterweight is suspended from an end of the rope connected to the acoustic reflector assembly after being wound around the rope drum of the hoisting machine. Board equipment. The hoisting machine includes a drive unit capable of rotating forward and reverse, a drive shaft connected to the drive unit, a plurality of rope drums attached to the drive shaft, and a pulley provided corresponding to each rope drum, 4. The stage according to claim 1, wherein the acoustic reflector assembly is lifted and lowered by a plurality of ropes corresponding to a plurality of rope drums. Acoustic reflector device.

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