JPS6146100Y2 - - Google Patents

Description

[Detailed explanation of the idea]

This invention relates to a sound insulating board that has a ventilation function.
A resonator is used to attenuate the sound that enters through the air passage. Conventionally, in order to provide a ventilation function to a sound insulation board used for a partition or door, for example, an opening is formed by penetrating the sound insulation board and a louver is attached to the opening.
Many sound insulation boards sacrifice the sound insulation performance, and there are few that have a ventilation function and can exhibit sufficient sound insulation properties. However, in this invention, an air passage is formed in a sound insulation plate in which two perforated plates are installed facing each other, and openings are formed at different positions in the face plate to communicate with the air passage. In addition to providing a ventilation function, a resonator made up of a perforated plate and a face material is installed in the air passage, and the sound that enters through the air passage is attenuated by the resonator. We provide ventilation sound insulation boards that also have sound insulation functions,
They succeeded in solving the above-mentioned conventional problems. That is, to explain this invention with reference to an embodiment, there are two face plates 2, 2 in which openings 1 are formed at different positions.
are arranged oppositely at a predetermined interval, and inside each of the facing materials 2, 2,
Perforated plates 4,
4 are arranged in parallel, and an air passage 5 is formed inside the face materials 2, 2 by the perforated plates 4, 4. The air passage 5 communicates with the openings 1, 1 through communicating portions 6, 6, respectively, and the inner walls of the communicating portions 6, 6 are coated with rock wool or glass wool at the positions where the sound passing through the portions hits. , a sound absorbing material 7 such as nonwoven fabric, cotton, etc. is installed. That is, in this embodiment, small holes 8, 8 are bored in the perforated plate 4 in the portion facing the opening 1, and the sound absorbing material 7 is installed in the space 9 surrounded by this portion and the face material 2. Cavities 10, 10 formed by the crosspiece 3 between the face plate and the perforated plate 4 in which small holes are bored.
(In the embodiment, three rows horizontally and four stages vertically) constitute a resonator R for sound entering the air passage 5. In the figure, 12 is a louver installed inside the opening 1.
3 and 14 are crosspieces. According to the embodiment described above, the openings 1, 1 and the air passage 5 allow air to flow from one side of the sound insulation plate to the other side, while allowing sound to pass through this. At the same time, the sound propagating through the air passage 5 can be attenuated by the resonator R configured toward the air passage 5, thereby providing a ventilation sound insulation plate having a ventilation function and a sound insulation function. be able to. As is known from the theory of resonators, the size of the cavity 10 and the size, position, etc. of the small hole 11 of the resonator R are limited, and therefore, in reality, the purpose of the resonator R is attenuation. It is necessary to appropriately determine the dimensions of each part depending on the frequency of the sound. Table 1 shows the resonance center frequency of 63 for each stage of the resonator R configured in four stages in the above embodiment.
It shows various specifications of the resonator R when set to Hz, 125Hz, 250Hz, and 500Hz.

[Table] In the table, W, L, and D are the dimensions of the parts shown in Figures 1 and 2, K is a value determined by √/2S, and S is the cross-sectional area of the air passage (duct). ,
N is the number of small holes 11, and G is the conductivity of one small hole. FIG. 3 shows the sound insulation characteristics of the ventilation sound insulation board manufactured according to the above specifications. In other words, the design attenuation amount at each center frequency is
In contrast to the 10 dB attenuation characteristic on the actual side, an attenuation characteristic of 20 to 25 dB was obtained, demonstrating excellent sound insulation characteristics. Next, FIG. 4 shows another embodiment of this invention, in which a deodorizing device 1 is installed in the communicating portions 6, 6, which communicate the opening 1 of the ventilation sound insulating board and the air passage 5, which are constructed in the same manner as described above.
5 and a dust removal device 16 are installed. In this embodiment, in addition to the same effects as in the previous embodiment, the deodorizing device 15 exerts a deodorizing effect on the air flowing from one side of the ventilation sound insulating plate to the other side through the air passage 5, and the dust removing device 16 provides a deodorizing effect. Can exhibit dust removal action. The deodorizing device 15
It goes without saying that the dust removal device 16 and the dust removal device 16 are installed as necessary for the circulating air, and that either one of them may be used. That is, according to this invention, since a resonator is arranged in parallel to the air passage for a sound insulation board provided with an air passage, it is possible to provide a sound insulation board that has a ventilation function and has excellent sound insulation properties. There is also the effect that rigidity can be obtained without increasing the weight by using the perforated plate and the face material through the crosspiece.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway reduced front view of an embodiment of this invention, FIG. 2 is a partially cutaway vertical side view of the same embodiment, and FIG. 3 is a sound insulation characteristic diagram of the same embodiment. FIG. 4 is a partially cut away vertical sectional side view of another embodiment of this invention. 1... Opening, 2... Face material, 3, 13, 14...
... Piece material, 4... Perforated plate, 5... Air passage, 6...
...Communication part, 7...Sound absorbing material, 8, 11...Small hole, 9
...Empty, 10...Hollow, 12...Garari, 15
... Deodorizing device, 16... Dust removing device.

Claims (1)

[Claims for Utility Model Registration] 1. Face materials are arranged in parallel at a predetermined interval on both sides of opposed perforated plates via crosspieces, and a cavity formed by the perforated plates and the face materials forms a resonator. Furthermore, each of the face members has openings formed at different positions, and these openings communicate with the air passage formed by the opposing perforated plate. Features ventilation sound insulation board. 2. The ventilation sound insulating board according to claim 1, wherein the resonators are installed in a plurality of stages so that their center frequencies differ. 3. The ventilation sound insulating board according to claim 1 or 2, wherein a sound absorbing material is installed on the inner wall surface of the communication portion between the opening and the air passage.