JPH0648560Y2 - Reverberation variable box - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a reverberation box which is attached to a wall of a lecture hall, a music room, an audiovisual room, or the like and used for adjusting the reverberation time in the room.

[Prior Art] It is desirable to set a long reverberation time in the room in order to listen to classical music with a pleasant sound, and to set a short reverberation time in order to hear conversations such as lectures clearly.

Therefore, conventionally, in auditoriums, music rooms, audio-visual rooms, etc., interior materials such as wall surfaces and ceilings are selected so that reverberation time can be obtained according to the purpose of use. Further, in order to finely adjust the reverberation time, a sound absorbing panel made of glass wool, rock wool or the like is hung on a wall or a curtain is hung.

[Problems to be solved by the invention] Conventionally, an appropriate interior material is applied to a wall surface of a room so that an appropriate reverberation time is obtained depending on the purpose of use of the room. However, only one kind of reverberation time is obtained. , The room cannot be used for multiple purposes.

On the other hand, when a sound absorbing wall hanging panel or the like is used, the reverberation time can be adjusted according to the purpose of use by selecting the number of panels. However, in this case, it is difficult to attach and remove the sound absorbing wall hanging panel, and the wall portion and the sound absorbing wall hanging panel are easily damaged during the work. Furthermore, since the adjustment is made according to the number of sound absorbing wall panels, it is difficult to make fine adjustment according to the purpose of use, and it is difficult to set an appropriate reverberation time.

Therefore, an object of the present invention is to make it possible to easily adjust the reverberation time and also finely adjust the reverberation time.

[Means for Solving the Problem] In the reverberation variable box of the present invention, a louver that can be opened and closed is provided in the opening portion of the box that is opened only on the front surface, and a suction plate having the same size as the opening surface is provided in the box. At the same time, the upper and lower parts of the sound absorbing plate are independently movable in the front-back direction.

In order to move the top and bottom of the sound absorbing plate independently in the front-back direction,
Rollers are provided on both upper sides of the sound absorbing plate via mounting fittings that can rotate and slide vertically, and rollers are provided on both lower sides of the sound absorbing plate via mounting fittings that are rotatable, and the front and rear direction of each roller Rails for guiding movement may be provided on the inner surfaces of both side walls of the box.

[Operation] In the reverberation variable box of the above means, the sound absorbing effect by the internal sound absorbing plate can be adjusted by adjusting the size of the opening amount of the louver on the front surface of the box. In addition, by moving the sound absorbing plate back and forth inside the box, and by making a difference in the amount of vertical movement to adjust the inclination angle, the thickness of the air layer behind the sound absorbing plate is adjusted to make the sound absorbing effect subtle. Can be changed to.

[Embodiment] An embodiment of the present invention will be described with reference to FIGS.

A box 1 having only a front surface opened is formed into a rectangular parallelepiped shape having the largest front surface, and an openable door 2 is provided on the front surface of the box. The door 2 is composed of a louver on its front surface, and the louver can be stopped at an arbitrary opening amount by allowing both end support shaft portions to rotate. It can be arbitrarily set up to a fairly large value. A mounting bracket 3 is provided on the back surface of the box 1, and the box 1 can be installed on a wall surface by locking the mounting bracket 3 with a receiving bracket 4 provided on the wall.

In the box 1, a sound absorbing plate 5 having the same size as the opening surface is arranged so as to face the opening surface. The sound absorbing plate 5 is made of a porous material or the like. Mounting brackets 6a are mounted on both sides of the sound absorbing plate 5, mounting brackets 6b are mounted at four positions on the upper and lower sides through the brackets 6a, and each mounting bracket 6b is rotatably connected to a pin 7 protruding outward. In this case, the upper two mounting brackets 6b can be slid up and down along the groove of the mounting bracket 6a, and the lower two mounting brackets 6b can be mounted on the mounting bracket 6a.
Fixed to. A horizontal shake prevention roller 8 is provided above the tip of each pin 7.
And a traveling roller 9 is provided below the tip of the pin 7.

In order to guide the various shake prevention rollers 8 provided on the sound absorbing plate 5 in the front-rear direction of the box 1, four rails 10a are attached to the inner surfaces of both side walls of the box 1 in the front-rear direction, and similarly guide rails for each traveling roller 9 10b are provided parallel to the lower side of each rail 10a. The upper and lower portions of the sound absorbing plate 5 can be independently moved in the front-rear direction by moving the traveling rollers 9 by guiding them on the rail 10b. When the sound absorbing plate 5 is tilted by this movement, the mounting member 6b rotates around the pin 7 mounting the upper traveling roller 9 and slides vertically with respect to the mounting member 6a. Further, since the lateral shake preventing roller 8 is sandwiched between the rail 10a and the inner wall of the box, lateral shake is prevented.

Support shafts for the two lateral shake prevention rollers 8 provided on the sound absorbing plate 5
8a project upward and the upper end of each spindle 8a
Connect to one place. Each belt 11 has a corresponding rail 10
It is wound around a small pulley 12 provided at the rear part of a and a rotating shaft 13 provided near the opening edge of the box 1. Rotating shaft
A dial 14 is attached to 13 and is partially projected to the front side from a through hole 16 of a panel 15 provided at the opening edge. By rotating the dial 14, the pin 7 is moved back and forth via the belt 11. In addition, the upper and lower parts of the sound absorbing plate 5 can be independently moved in the front-rear direction.

The reverberation variable box of the present invention is not limited to the configuration of the above-described embodiment, but can be applied by being changed to other configurations that are normally applied, since each partial configuration has the same function.

[Advantage of the device] In the reverberation variable box of the present invention, the sound absorbing plate can be moved back and forth within the box and can be tilted, and the opening amount of the louver on the front of the box can be adjusted. Since the thickness of the air layer can be adjusted, the sound absorption characteristics can be changed subtly and easily. Further, since the moving amount of the sound absorbing plate can be minutely changed, the reverberation time in the room can be finely changed.

[Brief description of drawings]

FIG. 1 is a side sectional view of a reverberation variable box according to the present invention, and FIG.
FIG. 3 is an external perspective view of the reverberation variable box, FIG. 3 is a front view of the sound absorbing plate moving device, and FIG. 4 is a side view of the sound absorbing plate moving device. 1; Box, 5; Sound absorbing plate, 6a, 6b; Mounting bracket, 10a, 10
b; rail

Claims (1)

[Scope of utility model registration request] 1. A louver that can be opened and closed is provided in an opening of a box that is opened only on the front surface, and a sound absorbing plate having substantially the same size as the opening surface is provided in the box, and the sound absorbing plate is rotated to both upper sides of the sound absorbing plate. In addition, the rollers are provided through mounting fittings that can slide up and down, and the rollers are provided at both lower sides of the sound absorbing plate through mounting fittings that are rotatable. A reverberation variable box characterized in that it is provided on the inner surface of both side walls, and the upper and lower parts of the sound absorbing plate can be independently moved and adjusted in the front-rear direction.