JP3558960B2 - Soundproof wall - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproof wall installed along a highway, a railway, or the like to prevent noise from leaking to the surroundings.
[0002]
[Prior art]
Tall noise barriers are provided on the side of railways such as highways and Shinkansen to suppress noise to the surroundings. This sound insulation wall is literally a flat wall, and concrete, synthetic resin, or the like is used as a material.
[0003]
However, if both sides of the road or track are surrounded by a wall, the wall blocks the eyes of the passengers, making it difficult to enjoy the outside scenery, and is likely to give psychological pressure. Therefore, in recent years, a transparent sound insulation wall using a transparent synthetic resin has appeared.
[0004]
However, regardless of whether it is transparent or not, since it is a flat surface, it is easily affected by wind, and therefore, it is required to have sufficient strength to withstand strong wind pressure such as a typhoon. To obtain strength, the weight of the wall increases, and the cost of manufacturing and installation also increases.
[0005]
[Problems to be solved by the invention]
Therefore, there is a demand for a soundproof wall which has a sufficient soundproofing effect and durability, does not completely block the driver's or passenger's line of sight, and is inexpensive to manufacture and install.
[0006]
[Means for Solving the Problems]
Deadening wall member according to claim 1 of the present invention, there is provided a sound barrier member that is column set along the road or track (A), a frame (8), the frame body provided with a gap to each other (8 ) Equipped with a plurality of soundproof cylinders (1), the soundproof cylinder (1) has a windmill (2) , can rotate around the axis in response to wind, and the soundproof cylinder (1) has ventilation on the outer peripheral surface A possible porous layer (4) is provided, and a plurality of sound absorbing chambers (R) are provided on the inner peripheral side of the porous layer (4), and at least some of the sound absorbing chambers (R) are adjacent to each other. to have other acoustic chamber vent (6) between the (R), said acoustic chamber (R) is a top plate ventilation hole (6) is provided with (3b), the top plate ( It is characterized in that it is formed by a partition plate (3b) provided radially vertically in 3b) and provided with a vent hole (6) .
[0007]
According to this, since the soundproof wall (A) is a row of the columnar soundproof cylinders (1), the scene can be seen from the gap of the soundproof cylinder (1) while obtaining a sufficient soundproof effect. The soundproof cylinder (1) has a columnar shape, and the wind blows through the gap between the soundproof cylinders (1), so that a strong force is not applied to the soundproof wall (A) itself. Therefore, a large strength is not required, and manufacturing and installation costs can be reduced. In addition, the soundproof tube (1) has a windmill (2) and can rotate around the axis in response to the wind, so that the entire circumference of the soundproof tube (1) sequentially faces the road or the track side by rotation. Therefore, the soundproof tube (1) becomes substantially uniformly stained. Therefore, only one side is not concentrated and soiled, the durability as a whole is improved, and the interval between maintenance such as replacement and cleaning of the soundproof tube (1) can be extended .
[0008]
According to a second aspect of the present invention, there is provided the soundproof wall body according to the first aspect, wherein the frame body (8) is installed in two or more layers, and the installation interval between the parallel frame bodies can be changed. Features.
[0009]
According to this, since the frames (8a) and (8b) provided with the soundproof tube (1) are arranged in parallel in two or more layers, the soundproofing effect is enhanced. The soundproof effect can be changed by adjusting the installation interval (w).
[0010]
In other words, if you want to obtain a large soundproofing effect such as near a tunnel entrance or a private house, the view is difficult to see, but the installation interval is reduced, and if not so large soundproofing is required, the installation interval is increased. The view can be made easier to see.
[0013]
The soundproof wall of claim 3 is the soundproof wall of claim 1 or claim 2, wherein the photocatalyst (5) is disposed on at least the surface of the wind turbine (2) (12) or the porous layer (4). It is characterized by.
[0014]
By decomposing NO _X in the exhaust gas by a photocatalyst such as TiO ₂ arranged on the surface according to (5), it is possible to purify the air.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described using preferred embodiments.
[0016]
[Example 1]
FIG. 1 is a front view of the soundproof wall (A) of the present embodiment, and FIG. 2 is a plan view thereof. In the figure, (1) is a soundproof cylinder having a sound absorbing effect, and (8) is a rectangular frame in which a plurality of soundproof cylinders (1) are arranged at intervals substantially equal to the diameter thereof.
[0017]
(7) is a central axis of the soundproof tube (1), and upper and lower ends thereof are rotatably supported by the frame (8). (2) is a windmill fixedly provided at the upper and lower ends of the soundproof cylinder (1) and, if necessary, at the center, and rotates when it receives wind. Therefore, when receiving the wind, each soundproof cylinder (1) rotates together with the windmill (2) around the central axis (7). The wind turbine (2) does not necessarily need to be provided at both the upper and lower ends and the center, and may be attached to another location as long as the soundproof cylinder (1) can be rotated.
[0018]
The frame (8) is usually provided in two rows in parallel, but the arrangement of the soundproof tubes (1a) and (1b) of the front and rear frames (8a) and (8b) is shifted by the same length as the diameter. They are arranged in a staggered pattern. Therefore, when the soundproof wall bodies (A) having the two rows of frame bodies (8) are viewed from the front, they are arranged with irregularities, but the soundproof tube (1) is arranged in a wall shape with almost no gap. It appears to overlap. However, the outside of the soundproof wall (A) can be seen obliquely from the gap between the front and rear soundproof cylinders (1a) and (1b).
[0019]
Thus, noise is caused by a vehicle passing through a road or a track, and the noise gradually spreads from the source to the surroundings. Part of the noise is effectively absorbed by the soundproof cylinder (1a) of the frame (8a) installed on the inner side (road side), but the remainder passes through the gap between the inner soundproof cylinders (1a). , Around the back of the inner frame (8a).
[0020]
However, since the sound is absorbed by the soundproof cylinder (1b) of the outer frame (8b) installed at the position just passing therethrough, the sound is efficiently absorbed as a whole without leakage.
[0021]
The distance (w) between the frames (8a) and (8b) can be appropriately changed and set in consideration of the soundproofing effect. FIG. 2 shows a state in which two frames (8a) and (8b) are installed close to each other.
[0022]
The soundproofing effect can be changed by adjusting the installation interval (w) between the frame bodies (8) in this manner. That is, in places such as entrances and exits of tunnels or near private houses, a large soundproofing effect can be obtained by reducing the installation interval (w), but the distance (w) between the front and rear soundproof cylinders (1a) and (1b) is large. Because it becomes narrow, the outside scenery becomes difficult to see. On the other hand, if a very large soundproofing is not required, the interval (w) can be increased to make it easier to see the scenery.
[0023]
FIG. 3 is a diagram showing the soundproof tubes (1a) and (1b), and FIG. 4 is a partial sectional view of the soundproof tubes (1a) and (1b). In the figure, reference numeral (4) denotes a porous layer capable of securing ventilation between the inside and the outside of the soundproof cylinder (1), which has fine irregularities on its surface and solidifies fibers or sponge-like materials or resin particles having an appropriate porosity. Alternatively, a material in which a resin nonwoven fabric is supported on a net made of stainless steel or the like may be used.
[0024]
(5) is a porous coating layer of TiO ₂ coated on the surface of the porous layer (4), which contributes to adsorption of exhaust gas and decomposition and reduction of NO _X in the exhaust gas.
[0025]
(9) is a shaft end fixed portion pivotally attached to the frames (8a) and (8b), and is screwed to both ends of the central shaft (7), respectively, and is provided with a windmill (2) and a soundproof cylinder. (1a) and (1b) are tightened and fixed. (10a) is a washer and (10b) is a spacer for adjusting the total length of the center shaft (7) and the length of the windmill (2) and the soundproof cylinders (1a) and (1b).
[0026]
FIG. 5 is a sectional view of the windmill (2), and FIG. 6 is a plan view of the windmill (2). (2a) is a blade, (2c) is a frame holding the blade (2a), and upper and lower ends of the blade (2a) are fitted into grooves provided in the frame (2c) to be integrated. ing.
[0027]
FIG. 7 is a longitudinal sectional view of the sound absorbing cell (3), and FIG. 8 is a bottom view of the sound absorbing cell (3). (3b) is a top plate having a mounting hole (3a) at the center, and (3c) is eight partition plates provided radially and perpendicular to the top plate (3b). The top plate (3b) and the partition plate (3b ) are provided with ventilation holes (6) .
[0028]
The sound absorbing cell (3) is stacked so that the central axis (7) penetrates the mounting hole (3a), and the porous cylinder forming the porous layer (4) is extrapolated on the outer periphery thereof. A sound absorbing chamber (R) surrounded by the plate (3b), the porous layer (4), the partition plate (3c), and the top plate (3b) of the sound absorbing cell (3) arranged below is formed. The size of the sound absorbing chamber (R) is designed so that the frequency of the sound to be absorbed is checked in advance, and the sound of that frequency can be effectively attenuated.
[0029]
(6) are ventilation holes provided at three places on the top plate of the above-mentioned sound absorbing cell (3), and allow air to pass between the sound absorbing chambers (R) vertically adjacent to each other. Incidentally, the partition plate (8) may be provided with a ventilation hole (6a).
[0030]
The noise first enters the sound absorbing chamber (R) inside the soundproof cylinders (1a) and (1b) while being absorbed by the surface of the porous layer (4). The porous layer (4) is softer than metal, has fine irregularities on the surface, and has an appropriate porosity, so that no reflected sound is generated. Further, since a coating layer of a photocatalyst such as TiO ₂ is provided on the surface of the porous layer (4), NO _X in the exhaust gas can be decomposed.
[0031]
Noise entering the sound absorbing chamber (R) through the porous layer (4) is effectively absorbed by the frequency component of the target area due to the damping effect of the sound absorbing chamber (R). If the top plate (3b) or the top plate of the lower sound absorbing cell (3) has a ventilation hole (6), the unabsorbed noise passes through the ventilation hole (6) and is vertically adjacent to the sound absorbing cell. The sound reaches the sound absorbing room (R) of (3), where the sound is also absorbed. Further, in this case, a frequency component corresponding to the sum of the upper and lower sound absorbing chambers (R) is also absorbed.
[0032]
As described above, the soundproof wall (A) of the present invention is different from the conventional soundproof wall in that the scene can be seen from between the soundproof cylinders (1a) and (1b), and it is difficult for the driver and the passenger to feel pressure. Further, even if a strong wind is received, the wind passes through the gap between the soundproof cylinders (1a) and (1b), and the soundproof cylinders (1a) and (1b) are also of a cylindrical type, so that they are less likely to receive the wind. Therefore, a large strength is not required for the soundproof wall (A), and the manufacturing and installation costs can be reduced.
[0033]
The soundproof cylinders (1a) and (1b) are rotatable by the windmill (2), and the entire circumference of the soundproof cylinders (1a) and (1b) is sequentially turned to the road side by the rotation. 1a) and (1b) become substantially uniformly stained. Therefore, only one side is not concentrated and becomes dirty, and the interval of maintenance such as replacement and cleaning of the soundproof tubes (1a) and (1b) can be extended.
[0034]
[Example 2]
The basic structure is the same as that of the first embodiment, but the structure of the windmill (12) is different. FIG. 9 is a longitudinal sectional view of the soundproof tube (1) of the present embodiment, and FIG. 10 is a transverse sectional view of the soundproof tube (1) of the present embodiment.
[0035]
In the first embodiment, since the windmill (2) is installed in series with the sound absorbing cell (3), the sound absorbing cell (3) is not arranged at the position of the windmill (2). The blade (12a) of the windmill (12) is arranged around (3).
[0036]
(12b) is a gap between the surface of the soundproof cylinder and the blade (12a), and (12c) is a mounting portion of the blade (12a) to the soundproof cylinder (1).
[0037]
A photocatalyst may be coated on the surface of the blade body (12a), or a fiber impregnated with the photocatalyst may be adhered to the surface by flocking processing.
[0038]
In the present embodiment, although the diameter is larger than that of the first embodiment, a larger sound absorbing space can be secured at the same height and the area of the blade can be increased, so that the soundproof tube (1) can be more smoothly even when the wind is weak. Can be rotated.
[0039]
In each of the above embodiments, the frame (8) is double-walled on one side of the road as a multi-wall, but it is single or triple or more in accordance with the degree of noise and the surrounding environment. You may arrange in line. In addition, the mounting interval of the soundproof tube (1) may be appropriately determined.
[0040]
【The invention's effect】
As described above, according to the present invention, it is possible to provide a soundproof wall which has a sufficient soundproofing effect, does not completely obstruct the line of sight of a driver or a passenger, and is inexpensive to manufacture and install.
[Brief description of the drawings]
FIG. 1 is a front view of a first embodiment.
FIG. 2 is a plan view of the first embodiment.
FIG. 3 is a diagram showing a soundproof cylinder.
FIG. 4 is a partial cross-sectional view of the soundproof cylinder.
FIG. 5 is a sectional view of a windmill.
FIG. 6 is a plan view of a windmill.
FIG. 7 is a longitudinal sectional view of the sound absorbing cell.
FIG. 8 is a bottom view of the sound absorbing cell.
FIG. 9 is a longitudinal sectional view of the soundproof cylinder of the second embodiment.
FIG. 10 is a cross-sectional view of the soundproof cylinder of the second embodiment.
[Explanation of symbols]
(1) Soundproof tube (1a) Inner soundproof tube (1b) Outer soundproof tube (2) Windmill (2a) Windmill blade (2c) Windmill frame (3) Sound absorbing cell (4) Porous layer (5) Porous Coating layer (photocatalyst)
(6) Ventilation hole (7) Central axis (8) Support frame (8a) Inner support frame (8b) Inner support frame (9) Shaft end fixing part (A) Soundproof wall (R) Sound absorbing chamber

Claims (3)

A soundproof wall arranged in line along a road or a track, comprising a frame, a plurality of soundproof cylinders attached to the frame with a gap therebetween,
The soundproof cylinder is equipped with a windmill, can rotate around the axis in response to the wind,
The soundproof cylinder is provided with a porous layer that can be ventilated on the outer peripheral surface, and a plurality of sound absorbing chambers is provided on the inner peripheral side of the porous layer, and at least a part of the sound absorbing chamber is adjacent to another sound absorbing chamber. Has a vent between
The sound-absorbing chamber is formed by a top plate provided with a ventilation hole, and a partition plate provided vertically and radially on the top plate and provided with a ventilation hole. . 2. The soundproof wall according to claim 1, wherein the frames are arranged in two or more rows, and an installation interval between the parallel frames can be changed. The soundproof wall according to claim 1 or 2, wherein a photocatalyst is disposed on at least a surface of the windmill or the porous layer.

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