JPH09322989A - Acoustic reflection system for stage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently provide the reflection effects of acoustics played by an orchestra, etc., in a hall or the like and to facilitate installation/handling. SOLUTION: An acoustic reflection system 10 is composed of plural gate- shaped acoustic reflection units 11, 12 and 13 which can be mutually freely put in/out. On the lower surfaces of the respective acoustic reflection units 11, 12 and 13, air bearings and ground bodies are provided. When air is fed into the air bearings with pressure, the respective acoustic reflection units 11, 12 and 13 are floated a little from the surface of a stage 1 so that these units can be moved on the stage 1 with a small power. Since the orchestra or the like on the stage 1 is covered with the acoustic reflection system 10, played sounds are reflected toward the seats for the audience so that the audience can enjoy powerful play.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound reflection device for a stage, which is installed in a stage such as a hall in order to improve a sound effect.

[0002]

2. Description of the Related Art In a hall or the like where an orchestra is played, various ideas are applied to the material and shape of the wall in order to improve the acoustic effect.

[0003]

However, since there is a considerable ceiling space on the stage and there is a considerable distance between the performer on the stage and the wall of the hall, the acoustic effect of the wall of the hall is It wasn't always enough.

Therefore, it is an object of the present invention to provide a sound reflection device for a stage which can sufficiently enhance the sound reflection effect of an orchestra on a stage such as a hall and which is easy to install and handle. .

[0005]

SUMMARY OF THE INVENTION The present invention comprises a plurality of gate-shaped acoustic reflection units that are installed on the stage so that they can be inserted into and removed from each other, and air bearings and air bearings are provided on the lower surfaces of these acoustic reflection units. In the contracted state, a grounding body is provided for grounding on the stage, and the acoustic bearing unit is levitated from the upper surface of the stage by this air bearing so that it can be moved forward and backward on the stage.

[0006]

According to the present invention having the above-described structure, the player can effectively reflect the performance sound toward the spectator seat in front of the stage by performing the performance inside the gate type acoustic reflection unit. Further, by using the air bearing, the sound reflection unit can be easily moved forward and backward on the stage without damaging the upper surface of the stage and pulled out or stored in a predetermined position.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a plan view of the inside of a hall in which a stage acoustic reflector is installed, FIG. 2 is a perspective view of the stage acoustic reflector, FIG. 3 is a partial plan view thereof, and FIG. 4 is a partial side view thereof.

First, referring to FIG. 1, the overall structure inside the hole will be described. Inside the hall is the stage 1 at the front and the spectator seats 2 at the back. 3 is an orchestra playing on stage 1. An acoustic reflector 10 is installed on the stage 1. The orchestra 3 plays inside the acoustic reflector 10.

Next, the acoustic reflector 10 will be described. 1 and 2, the acoustic reflection device 10 includes a plurality of (three in this example) acoustic reflection units 11, 12,
There are thirteen. Sound reflection unit 11, 12, 13
The outer shape of the is gate-shaped, and becomes smaller in order. The second acoustic reflection unit 12 can be freely put in and taken out of the first (first) acoustic reflection unit 11, and the third (last) acoustic reflection unit 13 is the second acoustic reflection unit. The unit 12 can be freely taken in and out. Further, as shown in FIG. 1, a back wall 14 is provided on the third acoustic reflection unit 13. A doorway 15 is opened in the side wall of the first acoustic reflection unit 11. The conductor of the orchestra passes through the doorway 15 at the time of encore.

Next, referring to FIG. 3 and FIG. 4, the moving means for moving the sound reflecting units 11, 12, 13 on the stage 1 will be described. Acoustic reflection unit 11,1
A plurality of air bearings 20 are provided on the lower surfaces of 2 and 13. Further, the grounding member 2 is provided on the side of the air bearing 20.
1 is provided. FIG. 4 shows that air is sent to the air bearing 20 from an air pump (not shown).
By blowing air from the sound reflection unit 1
It shows a state where 1, 12, 13 are slightly floated above the upper surface of the stage 1. Thus air bearing 20
If the sound reflection units 11, 12, and 13 are levitated above the stage 1, the sound reflection unit 1 can be made with a very small force.
1, 12, 13 can be moved by sliding on the stage 1. Further, if the pressure feeding of air to the air bearing 20 is stopped, the air bearing 20 contracts and the grounding body 2
1 is grounded on the stage 1, and sound reflection units 11 and 1
2 and 13 are fixed to the stage 1 (see the grounding body 21 shown by the chain line in FIG. 4).

Wheels 22 are provided on the lower surfaces of the acoustic reflection units 11, 12, and 13, and a motor 23 and a speed reducer 24 for rotating the wheels 22 are provided therein. When the motor 23 is driven, the wheels 22 rotate, and the sound reflection units 11, 12, 13 are self-propelled on the stage 1. In FIG. 1, a light reflection plate 2 is provided on the back surface of the back wall 14.
5 is installed. A laser unit 26 is provided on the front wall of the hole. The laser unit 26 emits laser light toward the light reflection plate 25 and receives the reflected light to detect the position of the acoustic reflection unit 13. The motor 23 is automatically controlled by a controller (not shown), and the sound reflection units 11, 12, 13 move forward and backward on the stage 1, but the laser unit 26 detects the current position of the sound reflection unit 13, and By transmitting the signal to the control device, the acoustic reflection unit 11 is prevented from deviating from the course.

In FIG. 4, one end of a frame 27 that pivotally supports the wheels 22 has sound reflection units 11, 12, and 13.
It is rotatably attached to the main body side by a pin 28.
The frame 27 is springed upward by a spring 29. Further, the air spring 34 is provided on the other end side of the frame 27.
Is held in. When the air spring 34 is inhaled, the wheels 22 land on the floor as shown in FIG. When the air bearing 20 is exhausted and the grounding body 21 is grounded, the air spring 34 is exhausted and contracted,
The frame 22 is rotated clockwise around the pin 28 so that the wheel 22 is lifted above the grounding body 21.

The acoustic reflector 10 is constructed as described above, and the handling method will be described below. In FIG. 1, when unnecessary, the acoustic reflection units 11, 12, and 13 of the acoustic reflection device 10 are retracted and housed behind the stage 1 as indicated by the chain line. In this state, the air bearing 20 and the air spring 34 contract,
The grounding body 21 is grounded on the stage 1.

In use, air is pumped to the air bearing 20 so that each of the acoustic reflection units 11, 12, 13 is levitated above the stage 1. Further, the air spring 30 is sucked into the vehicle to ground the wheel 22. Next, if the motor 23 is rotated in the forward direction, each of the acoustic reflection units 11, 12, 13 will move to the spectator seat 2
It advances toward and stops at the position shown by the solid line in FIG. Therefore, if the driving of the motor 23 is stopped and the pressure feeding of air to the air bearing 20 is stopped, the air bearing 20
Contracts and the air spring 34 also contracts, so that the sound reflection units 11, 12, and 13 are fixed on the stage 1.

As described above, the sound reflecting device 10 is pulled out to the stage 1 and a performance such as an orchestra is performed, but the sound of the performance is sound reflecting units 11, 12, 13 as shown by the arrow a in FIG. Is reflected toward the spectator seat 2, so that the spectator can enjoy a powerful sound. As shown in FIG. 1, each acoustic reflection unit 1
On the inner surfaces of 1 and 12, an inclined surface a for reflecting the sound forward is formed. When the performance is finished and the sound reflection device 10 is no longer needed, the operation opposite to the above is performed,
The motor 23 is rotated in the reverse direction and retracted to the position shown by the chain line in FIG.

5 (a) and 5 (b) are plan views of other uses of the acoustic reflector. In FIG. 5A, the three acoustic reflection units 11, 12, 13 are pulled out to the front of the stage 1, and the acoustic reflection units 12, 13 are housed inside the acoustic reflection unit 11. By installing the three acoustic reflection units 11, 12 and 13 compactly in this way, a small ensemble or a solo player can perform. 3a is the stage. Further, in FIG. 5B, the acoustic reflection unit 12 is housed inside the acoustic reflection unit 11, and is suitable for the medium-scale stage 3b. In this way, the drawing mode of the three acoustic reflection units 11, 12, 13 can be freely changed according to the scale of the performance.

FIG. 6 is a partial plan view of an acoustic reflecting device of another embodiment, in which a tape 30 such as a light reflecting tape or a magnetic tape is attached on the stage 1. Further, each acoustic reflection unit 11, 12, 13 is provided with a detection unit 31 such as a photo detection unit or a magnetic detection unit for detecting the tape 30. Although not shown in the drawing, each of the acoustic reflection units 11, 12, and 13 has an air bearing 2 as in the above-described embodiments.
0, a grounding body 21, wheels 22, a motor 23, and a speed reducer 24 are provided. Therefore, while detecting the tape 30 by the detection unit 31, each acoustic reflection unit 11, 12,
Move 13 forward and backward straight on Stage 1. Of course, the number of tapes 30 may be one.

FIG. 7 is a partial plan view of an acoustic reflecting device of still another embodiment. Rods 33 of a cylinder 32 are coupled to the rear surfaces of both sides of the rearmost acoustic reflection unit 13. Each of the acoustic reflection units 11, 12, 13 includes the air bearing 20 and the grounding body 21 described above,
The wheel 22 and the motor 23 are not provided. Therefore, if the rod 33 of the cylinder 32 is projected, the acoustic reflection unit 13 moves forward, and if the rod 33 is retracted, the acoustic reflection unit 13 moves backward. The acoustic reflection unit 1
Nos. 1 and 12 are manually moved forward and backward.

Of course, if air is pumped to the air bearing 20 and each of the acoustic reflection units 11, 12 and 13 is levitated, it can be slid with a small force, so that the power unit such as the motor 22 and the cylinder 32 can be moved. Instead of using it, the stage 1 may be manually moved forward and backward. In addition, in any of the above-described embodiments, the sound reflection device 10 can be installed on the stage 1 so as to be able to move forward and backward without performing processing such as paragraph difference on the floor surface of the stage 1. As described above, various design changes can be made to the means for moving the sound reflection units 11, 12, 13 forward and backward on the stage 1, and an accordion type link mechanism or the like can also be applied.

[0020]

According to the present invention, since the acoustic reflection unit is arranged so as to cover a performer such as an orchestra on the stage, the audience in the audience can enjoy a powerful performance. Further, by using the air bearing, each acoustic reflection unit can be smoothly moved forward and backward without adding processing such as paragraph difference to the stage.

[Brief description of drawings]

[Figure 1] Plan view of the hall where the stage acoustic reflector is installed

FIG. 2 is a perspective view of a sound reflection device on the stage.

FIG. 3 is a partial plan view of a stage acoustic reflector.

FIG. 4 is a partial side view of a stage acoustic reflector.

FIG. 5 is a plan view of another usage mode of the stage acoustic reflector.

FIG. 6 is a partial plan view of a stage acoustic reflector.

FIG. 7 is a plan view of a stage acoustic reflector.

[Explanation of symbols]

 1 Stage 2 Spectator Seat 3 Orchestra 10 Acoustic Reflection Device on Stage 11, 12, 13 Acoustic Reflection Unit 15 Doorway 20 Air Bearing 21 Grounding Body

Claims (1)

[Claims] 1. A plurality of gate-shaped acoustic reflection units installed on the stage so that they can be inserted into and removed from each other, and air bearings are provided on the lower surface of the acoustic reflection units, and the air bearings are grounded on the stage in a contracted state. Provide a grounding body to
A sound reflection device for a stage, characterized in that the air reflection unit is levitated from the upper surface of the stage by the air bearings and installed forward and backward on the stage.