JPH10207468A - Transparent sound-insulating wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a sound-insulating wall which is light in weight, haw transparency and is capable of exhibiting sound-insulating performance to noises of a broad frequency range by varying the spacings of the gap parts formed by transparent plates facing each other according to sections. SOLUTION: This transparent sound-insulating wall is constituted by arranging plural sheets of the transparent plates so as to face each other apart prescribed spacings. The sound-insulating performance of the wall is exhibited by arbitrarily changing the spacings of the gap parts formed by at lest one set of the transparent plates facing each other. The rugged parts are merely necessitated to be formed on the inner surface of at least either of one set of the transparent plates facing each other and may be formed on both of two sheets of transparent plates or above. Namely, the transparent sound- insulating wall partially varying in the sapcings of the gap parts (c) is manufactured by arranging, for example, two sheets of the transparent plates (a), (a) made of polycarbonate so as to face each other and providing the inner surface of the one transparent plate (a) made of the polycarbonate with the rugged parts (b) varying in the height.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transparent soundproofing wall, and more particularly to a transparent soundproofing wall for preventing noise generated from an expressway from being transmitted to the surroundings.

[0002]

2. Description of the Related Art Conventionally, asbestos slate boards and lightweight cellular concrete boards have been used as soundproofing boards for roads in terms of soundproofing effect. However, asbestos slate boards and lightweight aerated concrete boards are not transparent, making it difficult for the driver to see, and because of the heavy weight, the workability is poor and the support structure needs to be of high strength.
There are problems such as that the surface is easily stained by exhaust gas and the like, and it is difficult to remove the stain.

On the other hand, there is disclosed a transparent soundproof wall in which a plurality of transparent resin plates are fixed to face each other at a predetermined interval, for example, via spacers provided at a constant interval (see, for example, Japanese Patent Application Laid-Open No. H11-157556). For example, JP-A-8-151703,
JP-A-63-73296;
No. 30, JP-A-4-66284, etc.).

[0004] However, in the above-mentioned transparent soundproof wall, except for the spacer portion, the gaps between the opposing transparent resin plates are equally spaced in all portions, so that the soundproof effect against noise of a specific frequency is obtained. However, there is a problem that the soundproofing effect cannot be exhibited for a wide range of noise from low frequency to high frequency.

Therefore, the above-mentioned transparent soundproofing wall cannot be used as a soundproofing wall for a highway which requires soundproofing performance for a wide range of noise from low frequency to high frequency.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a transparent soundproof wall which is lightweight and transparent, and which can exhibit soundproof performance against noise in a wide frequency range.

[0007]

Means for Solving the Problems Claim 1 of the present invention
The transparent soundproof wall of the described invention (hereinafter referred to as the present invention 1)
A transparent soundproof wall in which a plurality of transparent plates are arranged so as to face each other at a predetermined interval, and that a gap between voids formed by at least one pair of opposing transparent plates is different depending on a part. Features.

The transparent soundproofing wall of the invention according to claim 2 of the present invention (hereinafter referred to as the present invention 2) is a transparent soundproofing wall in which a plurality of transparent plates are arranged so as to face each other at a predetermined interval. At least one transparent plate among the transparent plates is provided with a plurality of step-shaped uneven portions having different heights, and the interval between voids formed by at least one pair of opposing transparent plates differs depending on the region. It is characterized by having.

As the transparent plate used in the present invention, a transparent synthetic resin plate material is preferable, and for example, a plate material such as a polycarbonate resin and an acrylic resin is suitably used.

The thickness of the synthetic resin plate material is preferably 10 mm or less, because if the thickness is too large, the transparent soundproof wall of the present invention loses its lightness.

In the transparent soundproof wall of the present invention, a plurality of transparent plates are arranged so as to oppose each other at a predetermined interval, and the interval between voids formed by at least one pair of opposing transparent plates is arbitrarily changed. Thereby, soundproof performance is exhibited, and the interval between the voids may be changed continuously or may be changed stepwise. In order to change the space between the voids in a stepped manner, for example, a plurality of stepped uneven portions having different heights may be provided on the transparent plate.

The uneven portion may be formed on at least one of the inner surfaces of at least one pair of transparent plates, and may be formed on both of two or more transparent plates. The cross-sectional shape of the transparent soundproof wall having a stepped uneven portion provided on one side of the transparent plate is, for example, as shown in FIG.
Or the cross-sectional shape shown in FIG.

In FIG. 1, a step-shaped uneven portion b is provided on the inner surface of the transparent plate a, but since the outer surface is flat, the distance between the surfaces of the two transparent plates a is constant. on the other hand,
In FIG. 2, a step-like uneven portion d is provided on the inner surface of the transparent plate a, but a concave portion corresponding to the convex portion is formed on the outer surface, so that two transparent plates a and a The distance between the surfaces varies depending on the site.

The cross-sectional shape of the transparent soundproof wall having the concave and convex portions provided on both of the transparent plates is, for example, the cross-sectional shape shown in FIG. In FIG. 3, an uneven portion b is provided on the inner surface of one transparent plate a, and another uneven portion d is provided on the other transparent plate a. In FIG. 3, different uneven portions b and d are used in combination, but the uneven portions b or d may be provided on both transparent plates a.

Although FIGS. 1 to 3 show a transparent soundproof wall formed of two layers of transparent plates, the transparent soundproof wall may be formed of three or more layers of transparent plates. In this case, a step-shaped uneven portion is provided between two opposing transparent plates.

The shape of the uneven portion is not particularly limited, and examples thereof include a square (as a projected area on a transparent plate), a circle, and a triangle. In addition, the corners of the irregularities may be formed so as to be substantially right angles, or may be further formed into a slope or a curved surface by chamfering.

The dimensions of the one concavo-convex portion provided in the step shape are as follows:
The projected area on the transparent plate is 1 × 1 cm ² to 50
× 50 cm ² is preferred. When the projection area is less than 1 × 1 cm ² , the change in the gap between the gaps is small, and there is no great difference from the case where the gaps are at a constant interval. The nature also decreases. Also, even if the projected area exceeds 50 × 50 cm ² , the change in the gap between the gaps is small and there is no great difference from the case where the gaps are at a fixed interval. No longer available.

The number of layers of the transparent plate and the shape and dimensions of the concave and convex portions are appropriately determined depending on the required soundproof performance and the like.

As an example of continuously changing the space between the voids, for example, a structure in which a plurality of corrugated uneven portions having different heights are continuously provided on at least one of the inner surfaces. No.

[0020] The transparent plate having the irregularities is formed by extrusion molding,
It can be manufactured by injection molding, casting and the like.
By attaching both ends of the transparent plate to the columns and fixing them vertically, a transparent soundproof wall can be obtained.

[0021]

According to the transparent soundproof wall of the present invention, the gap between the two transparent plates which are arranged opposite to each other at a predetermined interval is partially different from each other, so that a low frequency to a high frequency can be obtained. Demonstrates soundproofing performance over a wide area of noise.

[0022]

Embodiments of the present invention will be described below. (Example 1) As shown in a partial schematic cross-sectional view of FIG. 1, two polycarbonate transparent plates a, a were disposed so as to face each other, and a high level was placed on the inner surface of one of the polycarbonate transparent plates a. By providing uneven portions b having different
A transparent soundproof wall in which the gap c was partially different was produced.

(Example 2) As shown in a partial schematic sectional view of FIG. 2, two polycarbonate transparent plates a, a
Are arranged so as to face each other, and by providing irregularities d having different heights on one polycarbonate transparent plate a,
A transparent soundproof wall in which the gap c was partially different was produced.

(Example 3) As shown in a partial schematic sectional view of FIG. 3, two polycarbonate transparent plates a, a
Are arranged so as to face each other, and the irregularities b having different heights are provided on one polycarbonate transparent plate a, and the irregularities d having different heights are provided on the other polycarbonate transparent plate a. Transparent soundproof walls with partially different intervals were made.

(Comparative Example 1) As shown in a partial schematic cross-sectional view of FIG. 4, two polycarbonate transparent plates a, a having different thicknesses are formed so that the gap c is uniformly spaced over the entire surface. The placed transparent soundproof wall was produced.

Comparative Example 2 As shown in a partial schematic cross-sectional view of FIG. 5, two polycarbonate transparent plates a, a having the same thickness are arranged so that the gaps c are uniformly spaced over the entire surface. A transparent soundproof wall was manufactured.

The transparent soundproof walls (size: 1480 × 1230 mm) obtained in the above Examples and Comparative Examples were subjected to JIS.
500, 1000 and 200 according to A1416
The sound transmission loss at a frequency of 0 Hz was measured, and the measurement results are shown in Table 1.

[0028]

[Table 1]

[0029]

The transparent soundproof wall of the present invention has the above-mentioned structure, is lightweight and transparent, and can exhibit soundproof performance against noise in a wide frequency range from a low frequency to a high frequency.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a transparent soundproof wall of Example 1. FIG.

FIG. 2 is a schematic sectional view showing a transparent soundproof wall of Example 2.

FIG. 3 is a schematic sectional view showing a transparent soundproof wall of Example 3.

FIG. 4 is a schematic sectional view showing a transparent soundproof wall of Comparative Example 1.

FIG. 5 is a schematic sectional view showing a transparent soundproof wall of Comparative Example 2.

[Explanation of symbols]

 a transparent plate b, d uneven part c void

Claims (2)

[Claims] 1. A transparent soundproof wall in which a plurality of transparent plates are arranged so as to face each other at a predetermined interval, and a gap between at least one pair of opposing transparent plates has an interval between portions. A transparent soundproof wall characterized by being different. 2. A transparent soundproof wall in which a plurality of transparent plates are arranged so as to face each other at a predetermined interval, wherein at least one of the transparent plates has a plurality of different heights. A transparent soundproof wall provided with a step-like uneven portion, wherein a gap formed by at least one pair of opposing transparent plates has a different interval depending on a portion.