JP2831562B2 - Noise barrier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproof wall which is installed around a road or a factory to prevent noise, and more particularly to a soundproof wall for attenuating a diffracted sound from the upper edge of the wall to the backside thereof. .

[0002]

2. Description of the Related Art Conventionally, as this kind of sound insulating wall, for example, Japanese Patent Publication No. 51-46969 discloses a sound insulating wall having a columnar sound absorbing material fixed along the upper edge of the sound insulating wall. Japanese Utility Model Laid-Open Publication No. 1-138909 discloses a sound absorbing tube provided along an upper edge of a sound insulating wall, and the inside of the sound absorbing tube is divided into a plurality of parts by a partition plate.

[0003]

However, in each of the conventional soundproof walls, the sound absorbing material or the sound absorbing cylinder is provided continuously over the entire length of the upper edge portion of the sound insulating wall. However, it is necessary to increase the surface area of the sound absorbing material or the sound absorbing cylinder, and there is a problem that a considerably large sound absorbing material or the sound absorbing cylinder is required. In addition, since the peripheral surface of the sound absorbing material or the sound absorbing cylinder is formed as a sound absorbing surface, the sound absorbing surface facing upwards is easily affected by ultraviolet rays, rain, snow, etc., and the sound absorbing effect is easily reduced as a whole, and the durability is improved. There is a problem that is inferior.

An object of the present invention is to provide a soundproof wall which solves such a conventional problem.

[0005]

In order to solve the above-mentioned problems, the present invention provides a sound-insulating wall having a large number of sound-absorbing members alternately provided on an upper edge portion of the sound-absorbing member on a front side and a rear side thereof, and a main sound absorbing surface of the sound absorbing body is provided on the sound insulating wall. It has a vertical shape substantially perpendicular to the body, and has an increased sound absorbing area to increase the sound absorbing power. That is, the soundproof wall of the present invention is:
A number of sound absorbers are provided alternately on the front side and the back side of the soundproof wall at predetermined intervals along the upper edge of the soundproof wall,
Each sound absorbing body is formed as a substantially vertical panel substantially orthogonal to the soundproof wall body, at least the vertical left and right side surfaces are sound absorbing surfaces, and the left and right side surfaces of the sound absorbing body adjacent to each other on the front side and the back side of the soundproof wall body. Are made to face each other.

[0006]

[Function] Even if the wall height of the soundproof wall is not increased, the diffracted sound circulating from the upper edge to the back side is absorbed from the sound absorbing surface of the sound absorber. At this time, since a large number of sound absorbers are provided at predetermined intervals, and the right and left vertical sides of the sound absorber are sound absorbing surfaces, the sound absorbing area can be widened and the sound absorbing performance can be improved to absorb sound. Also, since a large number of sound absorbers are provided alternately protruding from the front and back sides of the soundproof wall, the diffraction width of the diffracted sound is increased, the sound reduction effect is improved, and the propagation path of the diffracted sound becomes complicated. The noises cancel each other due to the interference, and the noise can be reduced.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. In the drawings, reference numeral 1 denotes a soundproof wall, which may have a conventionally known sound insulation or sound absorption structure made of a suitable material such as concrete, metal, synthetic resin, or a composite material thereof. This soundproof wall 1 is generally
A soundproof panel in which a sound absorbing material is filled in a box having a large number of sound absorbing holes is formed by stacking a plurality of columns between columns.
The soundproof wall 1 is provided at the side of a road, around a factory, or the like to prevent noise.

Reference numeral 2 denotes a sound absorber, which is provided at a predetermined interval along the upper edge of the soundproof wall 1. As shown in FIG. 1, the sound absorbers 2 are alternately provided on the front side and the back side of the soundproof wall 1. The sound absorbing body 2 is a substantially vertical panel that is substantially perpendicular to the soundproof wall body 1, and has a rectangular shape as shown in FIG. 1 or a semicircular, triangular, or polygonal shape as shown in FIGS. The shape may be appropriately determined.

Generally, as shown in FIGS. 1 and 2, the sound absorbing body 2 of the substantially vertical panel is protected at its peripheral edge by a peripheral edge 3 made of a punched metal, a steel plate, an aluminum molded product or the like. Perforated plates 5 having a large number of sound absorbing holes, such as punched metal and expanded metal, are provided on both left and right side surfaces serving as main sound absorbing surfaces 4, and a sound absorbing material 6 is provided in a frame formed by these surrounding edges 3 and perforated plates 5. Is filled. As the sound absorbing material 6, a material that absorbs noise of an unspecified frequency, such as glass wool or rock wool, is generally used after being covered with a resin film and protected.

The surrounding edge 3 of the sound absorber 2 may not only protect the sound absorbing material 6 but also be a sound absorbing surface having a large number of sound absorbing holes by using a punching metal or the like. The sound absorbing body 2 may have a sound absorbing plate made of aluminum fiber, ceramic, or the like provided at least on both left and right side surfaces serving as the sound absorbing surface 4 and have a hollow interior.

The sound absorber 2 can be attached to the soundproof wall 1 by, for example, attaching the upper and lower ends of the surrounding edge 3 of the sound absorber 2 to the soundproof wall 1 by appropriate means such as bolts. It may be attached, or one connected in advance at a plurality of intervals may be attached, and the attaching method is not particularly limited. .

The sound absorber 2 may be mounted on the upper edge of the existing soundproof wall 1 or, as shown in FIG. 3, previously mounted on a soundproof panel 7 containing a sound absorbing material. At the time of construction 1, the soundproof panel 7 to which the sound absorber 2 is attached may be provided on the upper edge of the soundproof wall 1 by being stacked on the uppermost stage. When the above-mentioned sound absorber 2 is attached to the soundproof panel 7 in advance, the workability is good and it is convenient.

The sound absorbers 2 projecting from the front side and the back side of the soundproof wall 1 may have the same size.
When the sound absorbing body 2 protruding to the rear side is made larger than the sound absorbing body 2 protruding to the front side, the noise reduction effect of the diffracted sound circling from the upper edge of the soundproof wall 1 to the rear side is improved. preferable.

[0014]

As described in detail above, the soundproof wall of the present invention has a number of sound absorbers provided at predetermined intervals along the upper edge of the soundproof wall, and the sound absorber is substantially orthogonal to the soundproof wall. Since a substantially vertical panel is formed, and at least the left and right vertical sides are sound absorbing surfaces, the sound absorbing area can be increased, the sound absorbing power can be increased, and the diffracted sound can be attenuated as compared with the related art. In addition, since the left and right sides of the sound absorber are formed as vertical sound absorption surfaces, the sound absorption surface is hardly affected by ultraviolet rays, rain, snow, etc., and the sound absorption effect can be maintained for a long time, and the durability of the sound absorber is improved. Can be improved.

Also, since a large number of sound absorbers are alternately provided on the front side and the back side of the soundproof wall at predetermined intervals, diffraction of the diffracted sound circling from the upper edge of the soundproof wall to the backside. The width can be widened and the sound reduction effect can be improved, and the propagation path of the diffracted sound becomes complicated, so that the noise can be canceled out by the interference and the sound can be reduced efficiently.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing one embodiment of a soundproof wall of the present invention.

FIG. 2 is a partially cutaway enlarged plan view of the soundproof wall of FIG.

FIG. 3 is a perspective view showing an example of a soundproof panel forming the soundproof wall of the present invention.

FIG. 4 is a partially cutaway side view showing another embodiment of the soundproof wall of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Soundproof wall 2 Sound absorber 3 Surrounding edge 4 Sound absorbing surface 5 Perforated plate 6 Sound absorbing material 7 Soundproof panel

Claims (1)

(57) [Claims] 1. A large number of sound absorbers are provided alternately at predetermined intervals along an upper edge portion of a soundproof wall at front and back sides of the soundproof wall, and each sound absorber is substantially orthogonal to the soundproof wall. At least the right and left sides of the sound absorbing wall are sound absorbing surfaces, and the sound absorbing surfaces of the left and right sides of the sound absorbing body adjacent to each other on the front side and the back side of the soundproof wall are opposed to each other. Soundproof wall.