JPH0742757B2 - Acoustic variable ceiling structure for hall - Google Patents

Description

TECHNICAL FIELD The present invention relates to an acoustic variable ceiling structure for a hall.

(Prior Art) In a theater, a hall, etc. (hereinafter referred to as a hall),
In addition to its original purpose of use, various events are often held. Therefore, in a conventional hall, an acoustic variable device is fixedly or detachably attached to the wall surface in the hall so that the acoustic effect in the hall can be changed according to a performance or an event.

(Problems to be Solved by the Invention) However, in a conventional acoustic variable device, a part of a wall is provided with an acoustic control plate having one surface having a sound reflecting function and the other surface having a sound absorbing function. , As the structure is such that one surface or the other surface is exposed, as necessary.
There is a problem that the degree of sound, that is, the reverberation time can be changed only in two steps, and the reverberation time may not be appropriate depending on the performance.

Therefore, an object of the present invention is to provide an acoustically variable ceiling structure for a hall, which can change the reverberation time in the hall almost continuously.

(Means for Solving the Problems) In the present invention, the ceiling of the hall is formed by a flexible acoustic control member, and the expanded area of the acoustic control member is increased or decreased by winding and unwinding the acoustic control member. By adjusting the acoustic effect, the above-mentioned object was achieved.

The acoustic control member is formed of an acoustic reflecting member or a sound absorbing member.

(Operation and Effect of the Invention) In the acoustic variable ceiling structure for a hall of the present invention, since the area of the ceiling, that is, the area that contributes to the acoustic effect can be set to an appropriate value, the performance performed in the hall, For example, the optimum sound effect, that is, the reverberation time, can be set for plays, pops, classical music, opera, and the like.

(Example) Hereinafter, a variable acoustic ceiling structure for a hall according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a front-rear cross-sectional view of a hall incorporating an acoustic variable ceiling structure according to an embodiment of the present invention. In this figure, reference numeral 1 indicates the interior of the hall.

This hall room 1 has a stage part 2 which is the front part.
And a passenger seat portion 3 which is a rear portion thereof.
The stage portion 2 is provided with a stage 4, and the audience seat portion 3 is provided with audience seats 5 continuously from the stage 4 to the rear.

An acoustic variable ceiling 10 is installed above the passenger seat portion 3. The acoustically variable ceiling 10 is provided with a plurality of guide rails 11 extending in the front-rear direction of the hall room 1 in parallel to each other at least on the side of the upper portion of the passenger seat portion 3 as shown in FIG. 2, for example. ing. The number of rails 11 is selected according to the size of the width inside the hall. rail
At a position above the rear wall 6 of the hole 11, a winding device 13 for winding a flexible and long acoustic control member 12 such as cloth is parallel to the rear wall 6. It is provided in. The ceiling is substantially constituted by the acoustic control member 12.

The front edge of the acoustic control member 12 is held by a moving body 14 that can move in the front-rear direction of the hole along the rail 11. The moving body 14 is configured to be moved along the rail 11 by a driving mechanism including an internal motor, gears, etc., and when the moving body 14 is moved to the front side of the hole, acoustic control is performed from the winding device 13. With the member 12 extended,
The expanded area of the acoustic control member that functions as a ceiling is enlarged.

On the other hand, since the winding device 13 winds the acoustic control member 12, the winding shaft 15 is rotatable, and the motor 16 for rotationally driving the winding shaft 15 via a gear train (not shown) or the like. Is equipped with. When driven, the winding device 13 winds up the acoustic control member 12 and reduces the development area of the acoustic control member that functions as a ceiling. When the acoustic control member 12 is rolled up, the moving body 14 on the front edge of the acoustic control member 12 is accompanied by this.
Also moves to the winding device 13 side.

A control device 17 including a microcomputer is connected to the plurality of moving bodies 14 and the motor 16. This control device 17, the storage unit 18, the area of the acoustic control member 12 that realizes the optimal acoustic effect, that is, the reverberation time, which is collected in advance by measurement, etc., for the performance of plays, pops, classical music, opera, etc. Stores data regarding the amount of feeding. An operation panel 20 having a plurality of operation keys 19 for instructing each of the above performances is connected to the control device 17.

Next, the acoustic variable ceiling according to the embodiment of the present invention having the above configuration
The operation of 10 will be described.

For this operation, first, the operation keys on the operation panel 20
Select 19 to operate and instruct the performance at that time. In this way, when the program is instructed, the control device 17 reads out from the storage unit 18 the data regarding the payout amount of the acoustic variable ceiling, that is, the acoustic control member 12 according to the program, and then this data is read. Accordingly, the moving body 14 or the motor 15 or the winding device 13 is actuated, the moving body 14 is moved along the rail 11, the acoustic control member 12 is paid out or wound up, and the acoustic control member, that is, the ceiling. Ten
The area is set to a predetermined value, and thus, an optimal sound effect, that is, a reverberation time, is realized in plays, pops, classical music, operas and the like.

Although the acoustic control member has been described as a cloth, that is, a sound absorbing member in the above-described embodiments, the acoustic control member may be formed of an acoustic reflection member made of a predetermined material. Further, the feeding and winding directions of the acoustic control member may be not only the front-back direction but also the left-right direction.

As described above, according to the acoustic variable ceiling structure for a hall of the present invention, the reverberation time can be continuously changed,
This makes it possible to set the optimum reverberation time for each performance.

[Brief description of drawings]

FIG. 1 is a front-rear cross-sectional view of a hall incorporating an acoustic variable ceiling structure according to an embodiment of the present invention, and FIG. 2 is a perspective view of the acoustic variable ceiling structure. 1 …… Hall room 10 …… Acoustic variable ceiling, 11 …… Guide rail 12 …… Acoustic control member, 13 …… Winding device 14 …… Moving body

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Claims (3)

[Claims] 1. A hall characterized in that the ceiling of the hall is formed by a flexible acoustic control member, and the expansion area of the acoustic control member is increased or decreased by winding and unwinding the acoustic control member to adjust the acoustic effect. Acoustic variable ceiling structure. 2. The acoustic variable ceiling structure for a hall according to claim 1, wherein the acoustic control member is an acoustic reflection member. 3. The acoustic variable ceiling structure for a hall according to claim 1, wherein the acoustic control member is a sound absorbing member.