JP5885221B2 - Edge effect suppression type soundproof wall panel - Google Patents

Description

  The present invention relates to an edge effect suppression type soundproof wall panel that absorbs diffracted sound at the upper end of the soundproof wall.

Conventionally, in order to prevent noise, the sound source side and the sound receiving side are generally separated by a soundproof wall.
However, since the sound wave has a diffraction phenomenon, that is, a property of trying to go around from the upper end of the soundproof wall to the sound receiving side, the soundproof performance of the soundproof wall cannot be fully exhibited.
In addition, in order to reduce the influence of diffracted sound at the top of the sound barrier, the height of the sound barrier can be increased. In this case, however, the cost increases and the height is restricted depending on the installation location. Can not get a good effect.

Therefore, a material in which a sound absorbing material made of a fibrous material and having a high sound absorbing effect is attached to the upper end of the soundproof wall has been proposed (see Patent Document 1).
In addition, as a shape having a high sound absorbing effect of the sound absorbing material, it has been proposed to have a substantially triangular shape having an inclined surface whose thickness becomes thinner toward the upper side (see Patent Document 2).
According to the techniques according to these proposals, the diffracted sound that tries to go around from the upper end of the soundproof wall to the sound receiving side is absorbed by the sound absorbing material, so that an excellent soundproofing effect can be obtained.

Japanese Patent Publication No.51-46969 International Publication No. 2012/102278

  However, in the thing of the said patent document, since the special means for keeping the shape of a sound-absorbing material in the predetermined shape considered that a sound-absorbing effect is high is not given, it is outdoors exposed to a collision of rain wind, a scattered matter, etc. However, it is difficult to keep the sound absorbing material in a predetermined shape, and there is a problem that the effect of absorbing the diffracted sound cannot be obtained stably over a long period of time.

  In view of the above-described problems, the present invention provides an edge effect-suppressing soundproof wall that can stably obtain a diffraction sound absorption effect over a long period of time even when used outdoors exposed to a collision with rain wind or flying objects. The purpose is to provide a panel.

In order to achieve the above object, the edge effect suppressing type soundproof wall panel of the present invention is installed at the upper end of a soundproof wall standing upright so as to partition the sound source side and the sound receiving side, and is received from the upper end of the soundproof wall. An edge effect-suppressing soundproof wall panel that absorbs diffracted sound that tends to wrap around the sound side. The sound absorbing material made of fibrous material is wrapped in a shape-retaining cloth that has air permeability, and the sound receiving side is directed upward. In addition, the sound source side and the sound receiving side have inclined surfaces inclined on the sound source side and the sound receiving side, respectively, so that the width on the upper end side is narrower than the width on the lower end side, and the width gradually decreases as it proceeds from the lower end toward the upper end. A panel body is formed by retaining the shape, and the panel body is covered with a protective cover having a vent hole, and diffracted sound is absorbed by the sound absorbing material through the shape retaining cloth from the vent hole of the protective cover. .

  In this case, the shape-retaining cloth can be made of a glass cloth having water repellency.

According to the edge effect-suppressing soundproof wall panel of the present invention, a sound absorbing material made of a fibrous material is wrapped in a shape-retaining cloth so that the sound absorbing effect is high, that is, the sound receiving side and the sound source side upward. Each of which has an inclined surface on the sound source side and the sound receiving side, and has a wedge shape that is narrower at the upper end side than the lower end side and gradually narrows from the lower end toward the upper end. Because the panel body is configured by this, and the panel body is covered with a protective cover, the effect of absorbing diffracted sound can be stably obtained over a long period of time even when used outdoors where it is exposed to the impact of rain, wind or flying objects. be able to.
Further, by adopting the edge effect suppressing type soundproof wall panel of the present invention, for example, even if the height of the soundproof wall is 4 m, a sound reduction effect of 6 m can be obtained. Can be made lower than before, and the cost can be reduced.

  In addition, the shape-retaining cloth is made of a water-repellent glass cloth, so that moisture can be surely prevented from entering the sound-absorbing material, and the sound-absorbing performance of the sound-absorbing material can be stably maintained. it can.

It is a figure which shows the soundproof wall provided with the panel for edge effect suppression type | mold soundproof walls which concerns on one Embodiment of this invention, (a) is a front view, (b) is a left view. It is a figure which shows the panel for edge effect suppression type | mold soundproof walls, (a) is a front view, (b) is XX sectional drawing of (a), (c) is structure explanatory drawing of a panel main body. It is a figure which shows the Example of the soundproof structure using the panel for edge effect suppression type | mold soundproof walls of this invention, (a) is a front view, (b) is a left view, (c) is a rear view. It is a figure which shows the soundproof structure which concerns on a comparative example, (a) is a front view of the soundproof structure of the comparative example 1, (b) is a left view of the soundproof structure, (c) is the soundproof structure of the comparative example 2. The front view of a thing, (d) is the left view of the soundproof structure. It is explanatory drawing of a soundproof experiment, (a) is a top view which shows a measurement point, (b) is a side view which shows a measurement point.

  Next, an embodiment of the edge effect suppressing type soundproof wall panel of the present invention will be described based on the drawings.

<Outline explanation of soundproof wall provided with edge effect suppressing type soundproof wall panel>
As shown in FIG. 1B, the soundproof wall 1 having the edge effect suppressing type soundproof wall panel according to the present invention includes a sound source side on which the sound source 2 is arranged on the ground G, and a sound from the sound source 2. The soundproof wall 3 is provided so as to be separated from the sound receiving side for receiving the sound, and the edge effect suppression type soundproof wall panel 4 is installed at the upper end of the soundproof wall 3.
As shown in FIG. 1A, the soundproof wall 3 is configured by combining required soundproof panels 5.
Although detailed description by illustration is omitted as the soundproof panel 5, a soundproof panel made by filling a sound absorbing material made of, for example, polyester wool or water repellent glass wool inside a protective cover having a vent is preferably used. It is done.
In addition, the edge effect suppressing type soundproof wall panel 4 serves to absorb the diffracted sound that tends to go around from the upper end of the soundproof wall 3 to the sound receiving side among the sound emitted from the sound source 2.

<Edge effect suppression type soundproof wall panel 4>
As shown in FIGS. 2A and 2B, the edge effect suppressing type soundproof wall panel 4 includes a panel body 11 and a protective cover 12 that covers and protects the panel body 11. Yes.

<Description of panel body>
As shown in FIG. 2C, the panel body 11 is configured by wrapping a sound absorbing material 13 with a shape retaining cloth 14 and retaining the shape in a predetermined shape having a high sound absorbing effect.
Here, examples of the sound absorbing material 13 include fibrous materials such as glass wool and rock wool, and it is preferable to use rock wool from the environmental viewpoint, and a material having a density of about 64 kg / m ³ is preferably used.
Moreover, as the shape-retaining cloth 14, for example, a glass cloth woven with glass fibers can be used, so that moisture can be surely prevented from entering the sound-absorbing material 13 and the sound-absorbing performance of the sound-absorbing material 13 can be stably maintained. In addition, it is preferable to use a water-repellent treatment.
In addition, as the predetermined shape having a high sound absorption effect, for example, the sound source side has an inclined surface 15 inclined upward toward the sound receiving side, and an inclined surface 16 inclined upward toward the sound source side toward the sound receiving side. The width W2 on the upper end side is narrower than the width W1 on the lower end side and gradually decreases in width from the lower end toward the upper end. A shape extending in a predetermined length dimension in the penetration direction).

<Description of protective cover>
As shown in FIGS. 2 (a) and 2 (b), the protective cover 12 is made of a punching plate having a large number of round holes that function as the air holes 17 in a staggered manner and an opening ratio of about 26 to 46%. Thus, the panel body 11 is formed in a shape that can cover the entire inclined surface 15 on the sound source side, the top portion 18, and the inclined surface 16 on the sound receiving side.
In addition, although the example which comprised the protective cover 12 with the punching board was shown here, it is not limited to this, The mesh board which has mesh-shaped opening as a vent hole, and many blade-like boards The protective cover 12 may be formed of a louvered plate in which the portions are arranged parallel to each other in a blind shape and a vent hole is formed between adjacent blade-like plate portions.

<Description of effects>
According to the soundproof wall 1 provided with the edge effect suppressing type soundproof wall panel 4 configured as described above, most of the sound emitted from the sound source 2 toward the sound receiving side is caused by the soundproof wall 3. While being absorbed, the diffracted sound that tends to wrap around from the upper end of the soundproof wall 3 to the sound receiving side is absorbed by the edge effect-suppressing type soundproof wall panel 4, so that an excellent soundproof effect can be obtained.
Moreover, in the edge effect-suppressing soundproof wall panel 4, the panel main body 11 is formed by wrapping the sound absorbing material 13 made of a fibrous material in a shape-retaining cloth 14 and keeping the cross-sectional wedge shape having a high sound absorbing effect. Since the panel body 11 is configured and covered with the protective cover 12, the diffraction sound absorption effect can be stably obtained over a long period of time even when used outdoors where it is exposed to a collision such as rain and wind. .

  Next, examples of the edge effect suppressing type soundproof wall panel of the present invention will be described with reference to the drawings.

FIG. 3 is a view showing an embodiment of a soundproof structure (soundproof wall) provided with the edge effect suppressing type soundproof wall panel of the present invention, and is a front view (a), a left side view (b), and a rear view ( c) is shown respectively.
FIG. 4 includes a front view (a) and a left side view (b) of the soundproof structure according to Comparative Example 1, and a front view (c) and a left side view (d) of the soundproof structure according to Comparative Example 2. Each is shown.

<Description of Example of Soundproof Structure>
As shown in FIGS. 3 (b) and 3 (c), the soundproof structure 20 shown in FIG. 3 (a) has an embedded material 21, a corroded material 22 and a diagonal material, each of which is a single tube for temporary enclosure installation. 23, a soundproof wall support 26 in which a support 24 and a horizontal ground 25 are connected to each other, and a soundproof wall 1 including an edge effect suppression type soundproof wall panel 4 supported in an upright state by the soundproof wall support 26. It is composed of

<Description of Comparative Example 1 of Soundproof Structure>
The soundproof structure 30 shown in FIGS. 4A and 4B has a configuration in which the edge effect suppression type soundproof wall panel 4 in the soundproof structure 20 of the above embodiment is omitted.

<Description of Comparative Example 2 of Soundproof Structure>
4 (c) and 4 (d), the soundproof structure 40 has a predetermined interval on a concrete foundation 41 constructed in the ground G, and the required H-shaped steel columns 42 face each other's web surfaces. A soundproof wall 45 is formed so that a required soundproof panel 44 is sandwiched between flanges of the H-shaped steel support 42 between the soundproof wall support 43 installed in a combined state and the adjacent H-shaped steel support 42. And is configured.
As the soundproof panel 44, as in the soundproof panel 5, the soundproof material made of, for example, polyester wool or water repellent glass wool is preferably filled in a protective cover having a ventilation hole. Used for.

As shown in FIG. 5 (a), with respect to the soundproof structures 20, 30, and 40 according to the above-mentioned Examples and Comparative Examples 1 and 2, the soundproof walls 1, 3, and 45 having a length of 40 m are provided in a vacant area of 114 m × 96 m. As shown in FIG. 5 (b), five measurement points indicated by symbols A to E in the drawing are arranged within a range of 20 m from the installation center of the sound barriers 1, 3, 45 to the sound receiving side. In addition, four measurement points were arranged in the height direction from 1.5 m to 3.5 m above the ground, and a total of 20 measurement points were provided to conduct a soundproofing experiment.
5 (a) and 5 (b), the structure of the soundproof structures 20, 30, 40 is simplified and schematically shown for convenience of explanation.

In the experiment, a loudspeaker as the sound source 2 was installed at a position 2 m away from the soundproof walls 1, 3, and 45 to generate a test sound, and the magnitude of the test sound was measured at each measurement point.
The loudspeaker was installed so that the center of the loudspeaker was at a position of 0.3 m above the ground.
The power level of the loudspeaker was 117 dB (A).
The height of the soundproof walls 1, 3, 45 in each soundproof structure 20, 30, 40 is 3.5 m, the test sound is compared at each measurement point, and the results are shown in Table 1. It was.

As is clear from Table 1, the soundproof structure 30 of Comparative Example 1 and the soundproof structure 40 of Comparative Example 2 have substantially the same measured values, and it is understood that the same soundproofing effect is achieved.
Moreover, in the soundproof structure 20 of the Example provided with the panel 4 for edge effect suppression type | mold soundproof walls, compared with the thing of the comparative examples 1 and 2, a measured value becomes small about 3-5 dB, and an edge effect suppression type | mold soundproof wall It can be seen that the soundproofing effect is increased by providing the panel 4 for absorbing the diffracted sound.

According to the soundproof structure 20 of the first embodiment, the edge effect suppression type soundproof wall panel 4 is attached to the soundproof wall 3 supported by the soundproof wall support 26 assembled with a required single pipe. Therefore, both installation and removal are easy and can be reused, and a high-performance soundproofing effect can be obtained easily and inexpensively.
It goes without saying that the same soundproofing effect as that of the soundproofing structure 20 of the embodiment can be obtained by adopting a configuration in which the edge effect suppressing type soundproofing wall panel 4 is attached to the soundproofing structure 40 of the comparative example 2. The concrete foundation 41 for constructing the concrete foundation 41 is necessary, which increases the installation cost, and the concrete foundation 41 becomes industrial waste when removed, resulting in additional industrial waste disposal costs. It can be said that 20 is more advantageous in terms of cost and environment.

  As described above, the edge effect suppression type soundproof wall panel of the present invention has been described based on the embodiments and examples. However, the present invention is not limited to the configurations described in the above embodiments and the like, and departs from the spirit thereof. The configuration can be appropriately changed within a range not to be performed.

  The edge effect-suppressing soundproof wall panel according to the present invention has a characteristic that the effect of absorbing diffracted sound can be stably obtained over a long period of time even when used outdoors where it is exposed to a collision with rain wind or flying objects. Therefore, it can be suitably used for the purpose of improving the sound environment around the construction site where construction sounds such as road construction and building construction are generated.

DESCRIPTION OF SYMBOLS 1 Soundproof wall provided with edge effect suppression type soundproof wall panel 2 Sound source 3 Soundproof wall 4 Edge effect control type soundproof wall panel 11 Panel main body 12 Protective cover 13 Sound absorbing material 14 Shape retaining cloth 15 Inclined surface 16 Inclined surface 20 Soundproof structure Things (sound barrier)
26 Sound barrier support

Claims (2)

For an edge effect-suppressing type soundproof wall that is installed at the upper end of a soundproof wall standing upright so as to separate the sound source side and the sound receiving side and absorbs the diffracted sound that attempts to wrap around from the upper end of the soundproof wall to the sound receiving side A lower end of a panel, in which a sound-absorbing material made of a fibrous material is wrapped with a shape-retaining cloth having air permeability, and has an inclined surface on the sound receiving side and the sound receiving side that is inclined upward toward the sound receiving side and the sound source side, respectively. The width of the upper end side is narrower than the width of the side, and the panel body is formed in the shape of a wedge- shaped cross section that gradually narrows from the lower end toward the upper end, and this panel body is protected with a vent hole. An edge effect-suppressing type soundproof wall panel characterized in that it is covered with a cover and diffracted sound is absorbed by a sound-absorbing material through a shape-retaining cloth from the vent hole of the protective cover.   2. The edge effect-suppressing type soundproof wall panel according to claim 1, wherein the shape retaining cloth is made of a glass cloth having water repellency.

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