JPH0542478Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to soundproof panels used as soundproof walls for roads and railways, as well as wall members of buildings. This relates to soundproof panels.

<Prior Art> Among so-called sound-absorbing soundproof panels, a resonator-type soundproof panel is known as one that attenuates sound through resonance.

FIG. 3 shows a perspective view of the main components of a conventionally available resonator type soundproof panel, and FIG. 4 shows a sectional view thereof.

In the figure, a panel body 1 has a large number of elongated spaces 2 formed along the thickness T of the panel body 1, and a slit 3 formed on one side, which is the sound introduction surface, to create spaces 2.
It has a structure that communicates with the outside. In terms of manufacturing, for example, in FIG. 3, the thickness T of the panel body 1 is
It can be obtained by forming slits 3 communicating from the surface to the hollow portions of one row on one side of an extrusion-molded cement plate having a large number of hollow holes 4 formed therein. In this case, the hollow portion communicating with the one side of the panel body 1 is the space 2 of the resonator.
The wall body is erected with the surface on the slit 3 side facing the sound source side. In Fig. 3, there are two rows of hollow holes 4, and the other side where the slits 3 are not formed is the panel body 1.
It has a lightweight or reinforcing function.

In a resonator type soundproof panel, the frequency band and effect of the sound absorbed and attenuated are determined by the shape of the space 2 of the panel body 1, the cross-sectional area S, the width W of the slit 3, and the length of the slit 3 reaching the space 2, that is, both sides of the slit. It varies depending on various factors such as the depth D of the slit 3 formed by the slit forming piece 1a.

When soundproofing panels are used to prevent noise from roads, building exterior walls, etc., a wide range of soundproofing effects is required from the low frequency band to the high frequency band.

In particular, when attenuating the bass frequency band, the above-mentioned shape and structure of the panel body 1 may require, for example, increasing the dimensions of the space 2, and also increasing the width W of the slit 3. Another possibility is to increase the depth D of the slit 3.

<Problems to be solved by the invention> However, in view of dimensions such as the thickness of the panel body, workability, etc., conventional methods have not yet been practically satisfactory.

That is, increasing the dimension of the space 2 or the depth D of the slit 3 increases the thickness T of the panel body 1, which poses a problem of increasing the weight of the panel body 1 and complicating the construction. In addition, in the method of narrowing the width W of the slit 3, the width W is usually several mm.
(for example, 1 to 2 mm),
Manufacturing technology problems arise in terms of accuracy, processing, etc.
Furthermore, in the case of building walls, there are problems with drainage and rain protection when installed horizontally, making it difficult to use as building walls.

The present invention is provided to solve the conventional problems as described above.

An object of the present invention is to provide a panel that can achieve a sufficient sound attenuation effect even if the panel body is thin.

<Means for Solving the Problems> In order to achieve the above object, the present invention provides a resonator in which a long and narrow space is formed in a panel body, and this space is communicated with the outside through a slit formed on one side of the panel body. In the type soundproof panel, slit side pieces of a predetermined length are vertically disposed inside the slits from both ends of the slits into the space while maintaining the groove width of the slits.

Further, on one side of the panel body, a large number of crank-shaped slit forming pieces inclined at an appropriate angle with respect to the panel surface are integrally formed at appropriate intervals, and the above-mentioned intervals are used as inclined slits, and the bottom of the slit is provided with the slits. A resonator space is formed and configured to communicate with the resonator.

<Function> Since the slit forming piece extends into the space of the panel body, the resonator effect can be achieved without increasing the thickness of the panel body while increasing the slit depth.
That is, the sound absorption and damping effect can be improved.

Furthermore, by providing the slit forming pieces at appropriate intervals and at an angle with respect to the panel surface, slits that are inclined relative to the thickness of the panel body are formed, and as a result, the depth of the slit itself can be significantly increased. It is possible to improve the sound absorption and damping effect.

<Embodiments> Preferred embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a sectional view of the main parts of a first embodiment of the present invention, and FIG. 2 is a sectional view of the main parts of a second embodiment of the invention.

The resonator-type soundproof panel of the first embodiment is similar in appearance to the conventional soundproof panel, but has an improved structure. The swallowing depth D1 of the slit 40 formed by both slit side pieces 20, 20 can be increased regardless of the panel thickness.

With this configuration, it is possible to increase the swallowing depth D1 of the slit, which is one of the factors for the sound attenuation function, even if the thickness T1 of the panel body 10 is small. This means that when the width W of the slit 3 of the conventional panel body 1 (see FIG. 4) and the width W1 of the slit 40 of this embodiment are the same, the panel of the first embodiment has a thickness T of This shows that the swallowing depth of the slit 40 can be increased by reducing the thickness T1 of the body 10. That is, if the sound absorption and attenuation effect in the same frequency band is the same as the conventional one, in this embodiment, the panel body 10
This means that the thickness T1 can be made thinner and lighter.

The resonator-type soundproof panel according to the second embodiment shown in FIG. 2 has a large number of crank-shaped slit-forming pieces 21 arranged at appropriate intervals on one side of the panel body 11 and inclined at an appropriate angle with respect to the panel surface. An inclined slit 41 is formed, and a space 31 is formed at the bottom of the slit and closer to the slit forming piece 21.
This space 31 is formed by the inclined slits 41 at appropriate intervals.
communicate with. The inclined slit 41 is used as a resonator slit, and the space 31 is used as a resonator space.

According to this configuration, the swallowing depth D2 of the inclined slit 41 can be made equal to or larger than the thickness T2 of the panel body 11. This means that, like the first embodiment, if the sound absorption and attenuation effect in the same frequency band is the same as that of the conventional soundproof panel, the soundproof panel of the second embodiment has a thinner thickness T2 of the panel body 11, This shows that it can be made lightweight.

As described above, in each of the above embodiments of the present invention,
Compared to a conventional resonator type soundproof panel, when the widths W1 and W2 of the slit 40 and the inclined slit 41 are the same, the thicknesses T1 and T1 of the panel bodies 10 and 11 are the same.
It is possible to form T2 thinner. Further, when the panel bodies 10 and 11 are made the same as the conventional panel body 1, the sound absorption and attenuation effect for sounds in the same frequency band is further improved.

In this way, the thickness T1 of the panel bodies 10, 11,
The fact that T2 can be formed thinly makes it possible to reduce the weight of the soundproof panel and improve workability.

In the above embodiment, the explanation was given by absorbing and attenuating the low frequency range, but functionally,
It is possible to apply attenuation to frequency bands generated by various sound sources, including high-frequency ranges. In this case, if the thickness of the panel body is the same as that of the previous embodiment, the width of the slit, the depth of insertion, the cross-sectional area of the space, etc. will be changed as necessary.

<Effects of the invention> As described above, according to the invention, when absorbing and attenuating sound in the same frequency band as before, when the width of the slits forming the resonator is the same, the thickness of the panel body can be made thinner. be able to.
This means that the soundproof panel can be made lightweight, and this thinner and lighter weight can further improve workability. Furthermore, it is possible to reduce the overall cost of materials, construction, etc.

Furthermore, if the slit-forming piece is formed at an angle, drainage of rainwater can be improved, making it even more practical to use as a building wall, and also exhibiting characteristics as a building design. .

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the main parts of a resonator-type soundproof panel according to the first embodiment of the present invention, and FIG. 2 is a cross-sectional view of the main parts of the resonator-type soundproof panel according to the second embodiment of the present invention. FIG. 3 is a perspective view of the main components of a conventional resonator-type soundproof panel, and FIG. 4 is a sectional view of the main components of a conventional resonator-type soundproof panel. DESCRIPTION OF SYMBOLS 10, 11... Panel body, 20... Slit side piece, 21... Slit forming piece, 30, 31... Space, 40... Slit, 41... Inclined slit,
D1, D2... Swallowing depth of the slit, S1,
S2... Cross-sectional area of space, T1, T2... Thickness of panel body, W1, W2... Width of slit.

Claims (1)

[Claims for Utility Model Registration] (1) Forming an elongated space in the in-plane direction of the panel body,
In a resonator-type soundproof panel in which the space is communicated with the outside by a slit formed on one side of the panel body, there is a hole in the space from both ends of the slit while maintaining the groove width of the slit. A resonator-type soundproof panel characterized by having a slit side piece of a predetermined length vertically disposed toward. (2) By arranging a plurality of crank-shaped slit-forming pieces on one side of the panel body at a predetermined angle and at appropriate intervals, a plurality of inclined slits that are open to the outside and have a predetermined depth are formed. A resonator-type soundproof panel characterized in that a space is formed at the bottom of each of the slits toward the side where the slits are formed.