JPH1018237A - Soundproof unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a V-shaped portion of a Y-shaped soundproof wall on the upper end side thereof into a unit so that the wall can be attached to a main wall easily and rapidly. SOLUTION: The soundproof units 1 are mounted parallelly on the upper end of a main wall formed by providing wall panels between supports disposed at a predetermined interval. In this case, a first and second branch walls 2, 3 which are inclined toward the side of a sound source and toward the opposite side of the sound source, respectively, are provided and a standing wall 4 which rises from the inner surfaces of the walls 2, 3 and extends from the side of the sound source to the opposite side of the sound side to interconnect both the walls 2, 3 is provided and further a plurality of connection pipes 5-7 are provided on the walls 2, 3 in the longitudinal direction of the main wall.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproof unit used for a soundproof wall provided as a measure for preventing noise generated by roads, railways, factories and the like.

[0002]

2. Description of the Related Art Conventionally, as a measure for preventing noise generated by roads, railways, factories, and the like, installation of a soundproof wall has been widely adopted to prevent noise from directly transmitting from a noise source. ing. This is because sound barriers are relatively inexpensive in various noise prevention measures, and are effective for various noise sources. In order to increase the noise reduction effect, it is necessary to increase the height of the soundproof wall. However, raising the noise barrier increases costs (the higher the height, the higher the construction costs,
It will increase the cost). In addition, there are many problems such as sunshine, landscape, view, feeling of oppression, ventilation, radio interference, wind load resistance, and the like.

Further, if the noise reduction effect is not sufficient with the straight wall alone, the front end of the soundproof wall or the front end of the soundproof wall formed by bending the front end of the soundproof wall toward the noise source side in a shape of "<" is used. There are curved soundproof walls that are curved on the noise source side, but these have more problems than landscape walls, such as landscape, view, oppression, ventilation, radio interference, wind resistance, and the like. Recently, with the increase in traffic volume and the speed of vehicles, the environmental noise problem has become serious, and there is no other countermeasure. Therefore, at the expense of the above problems, 3m, 7m, and 10m straight wall soundproofing. Walls, and even break-through soundproof walls,
Curved soundproof walls are used.

However, even if these soundproof walls are used, they can only be expected to have an effect corresponding to the height of the soundproof walls. In general, at a distant position (at a distance of about 20 m from the soundproof wall), the noise reduction effect obtained by increasing the height of the soundproof wall by 1 m is about 1 dB.

In order to increase the noise reduction effect without increasing the height of the sound-insulating wall, a Y-type sound-insulating wall as a whole has been developed by inclining the upper end side to the sound source side and the opposite sound source side. Was done. In the construction of the inclined wall on the upper end side of the Y-type soundproof wall, a frame was formed using a steel frame or the like, and a wall panel was attached to the frame.

[0006]

The assembling of the branch wall on the upper end side of the Y-type soundproof wall is not only a work at a high place, but also requires a slope, so that it is difficult to construct the branch wall. I couldn't shorten it either.

Accordingly, an object of the present invention is to provide a soundproofing unit in which a V-shaped portion on the upper end side of a Y-type soundproofing wall is unitized and can be easily and quickly mounted on a main body wall. .

[0008]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention relates to a soundproofing unit which is attached in parallel to an upper end of a main body wall formed by attaching a wall panel between columns provided at predetermined intervals. A first and a second branch wall that are respectively inclined on a sound source side and an anti-sound source side, and a standing wall that rises from the inner surface of these branch walls, extends from the sound source side to the anti-sound source side, and connects the two branch walls. It is provided with a plurality of connecting pipes provided on the branch wall along the length direction of the wall.

[0009]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a side view of the soundproofing unit 1, in which first branch walls 2 are inclined on the sound source side and on the opposite sound source side, respectively.
And a second branch wall 3, which rises from the inner surface of the branch walls 2, 3 and extends from the sound source side to the anti-sound source side to form the two branch walls 2, 3.
And a connecting pipe 5 at the intersection of the two branch walls 2 and 3, and connecting pipes 6 and 7 at the intermediate position of the branch wall 2 and the intermediate position of the branch wall 3, respectively. I have. Further, in this embodiment, re-branching walls 8 and 9 are provided which intersect with the rising wall 4 from an intermediate position between the inner surfaces of the branch walls 2 and 3. In addition, holes 4A to 4C are formed in the standing wall 4 to reduce the weight. Connecting pipe 5
Portions other than 7 can be integrally molded by means such as injection molding of a plastic material.

FIG. 2 is a plan view of the soundproofing unit 1 of FIG. 1 as viewed from above, and the upright wall 4 includes first and second branch walls 2 and 3.
In the width direction (that is, the length direction of the main body wall 22 (described later)).

The V-shaped angle formed by the first branch wall 2 and the second branch wall 3 is set to about 120 °, and the re-branch walls 8 rising from the two branch walls 2 and 3. 9 is both branch walls 2,
3 rises perpendicularly. The distance between the upper end of the first branch wall 2 and the upper end of the second branch wall 3 is 1256 mm
And The thickness of both branch walls 2, 3 and re-branch walls 8, 9 was 4 mm. The thickness of the standing wall 4 was also set to 4 mm. Further, a connecting plate 10 is provided at the upper end of the upright wall 4 at the center portion to connect between the upper ends of the re-branching walls 8 and 9. The width of the connecting plate 10 was 20 mm. In addition, connecting pipe 5
7 to 7 used a pipe made of polyvinyl chloride having an outer diameter of about 27 mm.

FIG. 3 shows a state in which a plurality of soundproof units 1 are connected, and a joint portion 11 for joining to the other side surface of another adjacent soundproof unit 1 is formed on one side surface of the branch walls 2 and 3. I have. As shown in FIG. 3, the joint portion 11 has a plate-like member fixed to the lower surface of one of the side walls of the branch walls 2 and 3, and the branch walls 2 and 2 of the other soundproof unit 1 are attached to the protruding portions of the plate-like member. 3 is placed on the other side. After placing, adhere. A plurality of soundproofing units 1 are juxtaposed while being jointed via a joint portion 11, and a connecting pipe 5 (6
And 7), and the connecting rod 12 is inserted into the connecting rod 12 and fastened with stoppers 13 at both ends. Thus, the plurality of soundproof units 1 are connected in parallel via the connection pipes 5 to 7.

FIG. 4 shows a main body wall 22 formed by mounting a wall panel 21 between columns 20 provided at predetermined intervals.
2 shows a state in which a plurality of soundproof units 1 are attached in parallel to the upper end of the soundproof unit 2. As the support 20, H steel was used. The wall panel 2 is inserted into the U-shaped gap of the pillar 20 made of H steel.
1 was dropped from above to form a main body wall 22.

FIG. 5 and FIG.
1 shows an example of a mounting member 14 for mounting on a support 20. The mounting member 14 includes a leg portion 14A that is mounted on a support 20 and a V-shaped portion 14B that is mounted on branch walls 2 and 3 of the soundproofing unit 1.

Although the above-described soundproofing unit 1 is formed of a plastic material, it may be formed of a metal material such as stainless steel or aluminum. The branch wall 2 on the sound source side
The sound absorbing material can be attached to the outer surfaces of the two, the inner surfaces of the branch wall 2 and the re-branch wall 8, and the inner surfaces of the branch wall 3 and the re-branch wall 9, respectively. Further, in the above-described embodiment, the re-branching walls 8 and 9 are all provided, but the re-branching walls 8 and 9 may not be provided.

FIG. 7 illustrates the sound transmission at the upper end side of the soundproof wall in which the soundproof unit 1 having the branch walls 2 and 3 and the re-branch walls 8 and 9 is attached in parallel to the upper end of the main body wall 22. . Diffraction sound is reduced by the existence of the re-branching walls 8 and 9 as compared with the conventional soundproof wall. FIG. 8 shows a sound pressure distribution when a 250 Hz octave band noise is generated, and FIG. 9 shows a sound intensity distribution. The unit of the numerical value in FIG. 8 is dB. The direction of the arrow in FIG. 9 indicates the direction in which the energy of sound flows, and the longer the length of the arrow, the greater the energy of sound.

FIG. 10 shows this soundproofing unit 1 attached to the main body wall 22.
The method of measuring the sound reduction (dB) in a state where the soundproofing device was mounted on the road was shown, and the soundproofing effect was measured by installing each soundproofing wall over a length of 100 m at the end of the road 30 of the embankment having a step of 3.5 m. The speaker 31 is installed on the road 30 which is 4.5 m away from the soundproof wall, and is set to 250 Hz, 500 Hz, 1 Hz.
KHz, 2KHz, 4KHz octave band sound is generated, 20m away from the edge of the road 30 and 1.
The microphone 32 was installed at a height of 2 m to measure the noise level. As a soundproof wall, a straight wall type consisting of only a main body wall having a height of 2.5 m from the ground is used as a comparative example. Based on this comparative example, a Y-type soundproof wall having no 2.5 m re-branch walls 8 and 9 is provided. Example A was a wall, and Example B was provided with re-branching walls 8 and 9 in Example A, and the sound reduction at each frequency was compared. The measurement results are as shown in Table 1 below.

[0019]

[Table 1]

As is clear from Table 1, the straight wall having only the main body wall, that is, the soundproofing effect of the embodiment A is higher than that of the comparative example, and the embodiment in which the re-branching walls 8 and 9 are provided as compared with the embodiment A. Example B
It can be seen that the soundproofing effect is higher for. The numerical values in Table 1 indicate the sound reduction (dB) with respect to the comparative example.

In general, the smaller the sound pressure level at the diffraction point of a sound, the weaker the diffraction sound. In the embodiment B, as shown in FIG. 11, at the tip of the re-branch wall 9 re-branched from the second branch wall 3 on the opposite side to the sound source, the sound wave a circulating from the sound source is reflected by the second branch wall 3. At a certain frequency, the sound pressure level becomes extremely low due to interference with the generated sound wave b, and the final diffraction sound is drastically reduced. Further, as shown in FIG. 12, it is considered that the energy flow becomes a vortex at a certain frequency from the sound receiving point side to the sound source side, and a noise reduction effect is produced.

[0022]

As described above, according to the present invention, the first and second branch walls are provided on the sound source side and the opposite sound source side, respectively, and rise from the inner surfaces of these branch walls and return from the sound source side. It has a standing wall that extends to the sound source side and connects both branch walls, and since it has a plurality of connecting pipes provided on the branch wall along the length direction of the main body wall, the work of attaching these to the upper end of the main body wall, Parallel connection can be easily performed via a plurality of connection pipes. Also, before installing the soundproofing units on site, each one is compact, easy to store and transport, and even at the time of construction, the V-shaped part on the upper end side of the Y-type soundproof wall is extremely easy and quick. You can do it.

[Brief description of the drawings]

FIG. 1 is a side view showing a preferred embodiment of the present invention.

FIG. 2 is a plan view.

FIG. 3 is a partial cross-sectional view showing a state where the soundproof units are connected to each other via a connection pipe.

FIG. 4 is a front view of a state in which a plurality of soundproof units are mounted in parallel on an upper end of a main body wall.

FIG. 5 is a side view showing an attachment for attaching the soundproofing unit to a main body wall.

FIG. 6 is a front view of the fixture.

FIG. 7 is a view for explaining sound propagation at a location of the soundproofing unit.

FIG. 8 is a sound pressure distribution diagram when noise is generated.

FIG. 9 is a distribution diagram of sound intensity.

FIG. 10 is a diagram illustrating a noise measurement test method.

FIG. 11 is a diagram for explaining sound wave interference.

FIG. 12 is a diagram illustrating a vortex of a sound wave.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Soundproof unit 2, 3 Branch wall 4 Standing wall 5, 6, 7 Connecting pipe 20 Prop 22 Main body wall

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical indication G10K 11/178

Claims (3)

[Claims] 1. A soundproofing unit attached in parallel to an upper end of a main body wall formed by attaching a wall panel between columns provided at predetermined intervals, wherein a first and a second soundproof unit are inclined on a sound source side and a counter sound source side, respectively. Two branch walls, rising from the inner surface of these branch walls, extending from the sound source side to the anti-sound source side, connecting the two branch walls, and further comprising a plurality of connections provided on the branch walls along the length direction of the main body wall. Soundproof unit equipped with a water pipe. 2. The soundproofing unit according to claim 1, wherein a joint portion is formed on one side surface of the branch wall for joining to the other side surface of another adjacent soundproofing unit. 3. The soundproofing unit according to claim 1, wherein a re-branch wall is provided on the inner surface of each of the branch walls so as to intersect the rising wall from the middle of the branch wall.