JP3354547B2 - Soundproofing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproofing device which can be suitably implemented to cut off noise from noise generating areas such as roads and tracks.

[0002]

2. Description of the Related Art A noise barrier is provided on the side of a noise generating area such as a track of a highway or a new transportation system to block noise generated in the noise generating area, and to construct a building such as an adjacent condominium. Noise is suppressed from being transmitted to the vehicle. Such a soundproof wall is disclosed, for example, in JP-A-5-156611. The soundproof wall is configured so that the outside is visible, a microphone fixed to and fixed to a fixing portion of the wall main body, a louver mounted so that the opening angle can be adjusted, and an opening angle of the louver is adjusted. A drive unit, and a control device for giving a drive command of a louver opening angle corresponding to the volume of the microphone to the driving unit. The control device includes a signal input from the microphone and a louver opening previously input and stored. Comparing the characteristic data of the angle and the sound volume to calculate the angle of the corresponding opening and giving a command to the louver drive device, the louver opening is reduced as the volume increases, and the louver opening is closed. As the size of the louver becomes smaller, the louver opening is made larger and the louver is controlled in the opening direction so that the driver can see the external view and improve the environment. That.

Another conventional technique is disclosed in Japanese Patent Laid-Open Publication No.
Reference numeral 4051 shows a waterproof / soundproof louver device having sound insulation and waterproofness, which is attached to a vent or a vent of a general building, a building, or another structure, etc. In this louver device, a plurality of vertically oriented blade plates are supported at predetermined intervals in the left-right direction between the upper and lower frame members, and each of the blade plates (corresponding to the louver of the present invention) extends inward and outward. Central wing part to be arranged,
A pair of left and right arc-shaped blade portions formed so as to be symmetrically branched from one end side of the center blade portion to the center blade portion and smoothly curved to the other end side of the center blade portion. , Each of the adjacent blades described above,
One of the arc-shaped blade portions is opposed to each other and staggered at an appropriate interval, and the outer edge of the arc-shaped blade portion is spaced from the center blade portion of the adjacent blade plate at an appropriate interval. In addition to maintaining sufficient ventilation performance, it is possible to suppress infiltration of rainwater into the inside against strong wind and rain from any angle, and to prevent the sound of the inside or outside from going straight to the opposite side. It is configured so that it can be suppressed.

[0004] Another conventional technique is disclosed in
223587 shows an openable / closable soundproof louver device provided in a communication opening such as a wall surface, a door, or a duct. This louver device is provided with a plurality of blades (corresponding to a louver of the present invention) arranged in a horizontal direction in a communication opening of a wall surface, a door, a duct, or the like, and the blades are inclined with respect to the flow of air. It is arranged at a predetermined interval so as not to form a horizontal through-passage, and a sound insulation plate that is opened by wind pressure at the exit or entrance at the interval of each blade is provided to prevent the noise inside the building from leaking outside through the ventilation passage. It is configured so that it can be prevented and the function of passing outside air is not impaired.

[0005] Still another conventional technique is disclosed in
At -89512, a louver device for motorways is shown. In this louver device, support bars are horizontally extended in parallel from the south to the north at appropriate intervals from the inside and outside of the tunnel, such as at the entrance of the tunnel, at different intervals, and the parallel support is provided. The crossbars are supported by horizontal support rods at appropriate intervals, and a plurality of inclined shield plates (corresponding to louvers of the present invention) are arranged in parallel between the parallel support crossings vertically. A large number of light-transmitting pores are drilled and opened in the inclined shield plate, and a bent shield plate having a bent portion facing south is provided as each inclined shield plate. When a car enters a tunnel, the discontinuity between the outdoor brightness and the brightness inside the tunnel is further remarkably reduced, and a part of artificial lighting is borne to save power costs. Have been.

[0006]

Problems to be Solved by the Invention
Although the soundproof wall as shown in FIG. 1 can suppress the propagation of noise to the side of the noise generation area, it cannot suppress the propagation of noise above the noise generation area. Therefore, when the adjacent building is a low-rise building, the above-mentioned soundproof wall can provide a noise blocking effect, but in an urban area, the adjacent building may be a high-rise building. In such a case, the noise of the noise barrier may be applied to the higher floors of the building located above the noise generation area, which can be seen from the vehicles running on the road and the track through the noise barrier. No blocking effect can be obtained.

On the other hand, it is conceivable that the height of the soundproof wall is set to a height at which a high floor of a building cannot be seen from the vehicle through the soundproof wall, but from the viewpoint of wind resistance load strength. Therefore, it is difficult to provide a soundproof wall that can obtain a noise blocking effect even on a high floor of a high-rise building. Also, it is conceivable that a roof having the same configuration as the soundproof wall is provided extending from the soundproof wall in an arch shape above the noise generating area to form a dome-shaped structure, and this structure covers the noise generating area. However, the production cost is high, the production cost is high, and the vehicle is formed in a tunnel shape. Therefore, a separate ventilating facility for removing exhaust gas discharged from the vehicle is required.

A louver device disclosed in Japanese Patent Application Laid-Open No. 4-84051 is provided at a ventilation opening of a building or the like. The louver device is used for an area above a noise generated in an outdoor noise generating area such as a road and a track. Is not a configuration that can suppress the propagation of Specifically, the blades are provided so as to face each other, and the space between the blades is not linearly inserted in any direction, and has a large resistance to movement of air or the like. In such a configuration, when installed outdoors, a large wind pressure load is applied. Thus, no consideration has been given to wind pressure loads acting outdoors.
It cannot be used as a soundproofing device outdoors.

[0009] The device disclosed in Japanese Patent Application Laid-Open No. 60-223587 is also provided in a ventilation opening of a building, similar to the device disclosed in Japanese Patent Application Laid-Open No. 4-84051, and is used for outdoor noise generating areas such as roads and tracks. This is not a configuration that can suppress the propagation of the noise generated in the above to the upper region. Specifically, a sound insulating plate that closes the interval between the blades is provided, and when the sound insulating plate is not opened, the space between the blades is not linearly inserted in any direction, and air Has great resistance to movement. Although the sound insulating plate is configured to open by wind pressure, the sound insulating plate provides resistance to the movement of air. In such a configuration, when installed outdoors, a large wind pressure load is applied.
As described above, no consideration is given to the wind pressure load acting outdoors, and it cannot be used as a soundproofing device outdoors. Further, in this device, there is a risk that the sound insulating plate may open and close due to wind pressure to generate sound, and the device itself may be a source of noise.

Further, the louver device for an automobile road disclosed in Japanese Patent Application Laid-Open No. 55-89512 is provided with an inclined shield plate having a light-transmitting pore to reduce the discontinuity of luminance inside and outside the tunnel. . Further, the inclined shielding plate has a bent portion, and the resistance to the movement of air between the inclined shielding plates is increased, so that the configuration is enlarged to obtain sufficient strength.

[0011] In addition to the above-mentioned prior arts, Japanese Patent Laid-Open No.
510 and JP-A-54-45838 disclose devices provided with a soundproof structure using a louver. However, each of these devices also generates noise such as roads and tracks in the same manner as in the prior arts described above. It is not a configuration that can suppress propagation of noise generated in the region to the region above.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a small soundproofing device which can suppress the propagation of noise generated in a noise generation area existing outdoors to an area above the noise generation area. To provide.

[0013]

SUMMARY OF THE INVENTION The present invention comprises a plurality of louvers provided above a road existing outdoors and extending in a longitudinal direction of the road, each louver in a predetermined direction perpendicular to the longitudinal direction. The predetermined direction inclining from the road toward one side thereof with respect to a vertical direction perpendicular to the longitudinal direction,
The louvers are arranged in the transverse direction of the road so that the thickness direction of the louvers is the same as that of the louvers. It is a soundproofing device characterized by being arranged.

According to the present invention, a plurality of louvers are provided above the road, and the louvers can cover the road from above. Each louver extends in the longitudinal direction of the road, is provided side by side in the transverse direction, and is disposed so as not to form a space that is linearly inserted in a predetermined direction. Vibration of air, which is noise, propagates in the predetermined direction. Can be suppressed. Furthermore, since each louver is provided so that its thickness direction is the same as the predetermined direction, the directional characteristics of the soundproofing device may be set to the directional characteristics that can most suppress noise propagation in the predetermined direction. it can. This makes it possible to realize a soundproofing device having a high effect of suppressing the propagation of noise in the predetermined direction. The predetermined direction is a direction perpendicular to the longitudinal direction and inclined toward a side of the road with respect to the vertical direction. This allows noise to propagate from the road in a direction that is perpendicular to the longitudinal direction and that is inclined to the vertical direction toward one side of the road,
It can be suppressed with a high propagation suppression effect. Therefore, a region which is perpendicular to the longitudinal direction of the road and which exists in a direction inclined with respect to the vertical direction toward one side of the road, for example, a region adjacent to the road on one side of the road. Propagation of noise generated on the road to the upper region can be suppressed.

Since the louvers capable of suppressing the propagation of noise are arranged with spaces that are linearly inserted in a direction different from the predetermined direction, air or the like is disposed in the predetermined direction. The resistance when moving in a direction different from the above can be reduced. Therefore, the wind can easily blow through the space between the louvers, and it is possible to prevent a large wind pressure load from acting on the soundproofing device. This eliminates the need for the soundproofing device to have a large wind load resistance, so that the soundproofing device can have a simple configuration. Can be provided.

With such a configuration, it is possible to easily realize a soundproofing device that can suppress the propagation of noise from the noise generation area to an area above the noise generation area at low cost. This soundproofing device is provided, for example, in such a manner that each louver is provided above a road and a track, so that noise caused by running of the vehicle is prevented from being transmitted to a high-rise building provided adjacent to the road and the track. can do.

Further, according to the present invention, each of the louvers has a crescent-shaped cross section perpendicular to the longitudinal direction, and includes a louver body concave toward the road, and a sound absorbing material provided in the recess of the louver body. It is characterized by having.

According to the present invention, each of the louvers is formed in a crescent shape in which the louver body is concave toward the road, so that even if noise is reflected by each louver, the louvers are on the opposite side of the road. Propagation can be made difficult, and the effect of suppressing noise propagation can be enhanced. In addition, a sound absorbing material is provided in the recess of the louver body, and thus on the road side, so that the sound absorbing material can absorb noise, in other words, absorb the energy of air vibration and attenuate the noise. Therefore, the effect of suppressing noise propagation can be enhanced. As described above, it is possible to realize a soundproofing device having a high effect by improving the effect of suppressing noise propagation.

Further, the present invention has a nozzle fixed at a position facing each other louver adjacent to each of the louvers, and an ejection means for atomizing and ejecting a liquid from the nozzle to a space between the louvers. And a jet liquid supply means for supplying the liquid to the jet means.

According to the present invention, the liquid is atomized and ejected from the nozzle fixed to each louver into the space between the louvers, so that the vibration of the air propagated into this space is changed by the atomized liquid. This allows the vibration energy to be absorbed and attenuated, and thus the noise transmitted between the louvers to be absorbed. Therefore, even when the space is formed between the louvers so that the wind pressure load can be reduced, it is possible to greatly suppress the noise from leaking from this space and propagate upward, and the soundproofing effect can be further improved. . Such a liquid is realized, for example, by water,
A high sound absorbing effect can be achieved, and handling is easy. The liquid ejected from the ejecting means is supplied by the ejecting liquid supplying means, and by adjusting the amount of liquid supplied by the ejecting liquid supplying means, the sound absorption characteristics can be easily adjusted, and the noise level can be reduced. The sound absorbing material can be adjusted so as to obtain the optimum sound absorbing characteristics, and the sound absorbing material can be always achieved without the risk of deterioration due to aging as compared with the case of using the sound absorbing material. There is no dropout or loss, no maintenance work is required, and reliability can be improved.

[0021]

[0022]

[0023]

[0024]

FIG. 1 is an enlarged perspective view showing a part of a soundproofing device 1 according to an embodiment of the present invention. The soundproofing device 1 has a plurality of louvers 3 provided side by side above a road 2 which is a noise generation area existing outdoors. Each louver 3
Are arranged without a linear insertion in the predetermined direction A and with a space 4 that is inserted linearly in a direction intersecting the predetermined direction, specifically, a direction B orthogonal to the predetermined direction. Each louver 3
Are supported by the support structure 5 and provided above the road 2. In FIG. 1, a part of the support structure 5 is cut away.

FIG. 2 is a perspective view showing the entire structure of the soundproofing device 1, and shows the soundproofing device 1 as viewed obliquely from above. FIG.
FIG. 2 is a sectional view showing a part of the soundproofing device 1. Soundproofing device 1
Is a device for preventing noise generated on the road 2 from being propagated to the surroundings, and includes a louver-shaped soundproof body 6. In the present embodiment, since the soundproofing device 1 is provided symmetrically with respect to the central portion in the transverse direction of the road 2, only the configuration related to one side lane will be described. The road 2, which is a travel path on which a vehicle 8 such as a vehicle travels, is formed above a road structure 9, which is a travel path structure. The road 2 is, for example, an elevated highway, and the road structure 9 includes a plurality of main girders 10 supported by piers 11 and a subgrade 12 that is supported by each main girder 10 to form a road surface. I have.
A separating body 13 is provided at a central portion of the roadbed 12 in the transverse direction X, and lanes are formed on the roadbed 12 on both sides of the separating body 13, and each lane forms the road 2. A soundproof wall 7 is provided on the side of the road 2. Thus, one side lane of the road 2 is formed on one side of the separating body 13.

The louver-shaped soundproof body 6 includes the plurality of louvers 3 and a support structure 5 for supporting each louver 3, and the support structure 5 includes a holder 14 for holding each louver 3.
And a support 15 for supporting the holder 14. Each strut 1
5 is fixed at the lower end on the side of the noise generation area,
Specifically, a plurality of the lower surfaces are provided on one side of the one side lane of the roadbed 12 and the separating body 13 at intervals in the longitudinal direction Y of the road 2 so as to be disposed on both sides of the one side lane. The part is fixed. To be fixed to the upper end of each strut 15 and extend from each strut 15 so as to protrude above one lane,
In the present embodiment, the support 1
4 are provided.

The holder 14 connects a plurality of beams 16, for example, a plurality of beams extending along the longitudinal direction Y of the road 2 and a plurality of beams extending along the transverse direction X of the road 2 to form a frame. It is formed. Each louver 3 held by the holding body 14
Is provided above the one-sided lane 2. Each strut 15 and each beam 16 may be a profile made of a metal such as steel and an aluminum alloy, for example. In particular, the beam 16 is
5 is preferably made of a light metal alloy such as an aluminum alloy. Here, "along the transverse direction X and the longitudinal direction Y" means that each direction X, Y
Is not only parallel to
Includes tilting at a small angle of about 5 degrees or less.

Referring also to FIG. 1, each louver 3 has a long plate shape, is provided extending along the longitudinal direction Y of the road 2, and is arranged along the transverse direction X of the road 2. . Each louver 3 is fixed to a beam along the transverse direction X at both ends in the longitudinal direction, and is provided side by side so as to fit into the frame-shaped holding body 14.

Each louver 3 includes a louver main body 17 and a sound absorbing material 18. The louver main body 17 is a plate-shaped member having a crescent shape in a cross section perpendicular to the longitudinal direction, and curving convexly in one thickness direction. At least the convex side of the louver body 17, in the present embodiment, each surface on both sides in the thickness direction,
For example, it is formed smoothly by a cylindrical surface. The louver body 17 is made of, for example, a light metal such as aluminum and its alloy or a synthetic resin, and is formed to be lightweight and highly rigid.

The sound absorbing material 18 is made of a fiber material and a porous material, specifically, for example, glass wool or rock wool. The sound absorbing material 18 is provided in a recess on the other side in the thickness direction of the louver main body 17. Each louver 3 includes a flat holding member 19 provided on the other side in the thickness direction of the louver main body 17 and fixed to both ends in the width direction of the louver main body 17. The holding member 19 is a member having a large number of through-holes, such as a punched metal and a net-like member. Sound absorbing material 1
8 is provided so as to be filled between the louver main body 17 and the holding member 19. Here, the longitudinal direction, the width direction, and the thickness direction of the louver 3 are orthogonal to each other.

Each of the louvers 3 has a cross section perpendicular to the longitudinal direction as a whole such that the length between both ends in the width direction on the outer surface is longer on one side in the thickness direction than on the other side in the thickness direction. Is formed. Specifically, the outer shape of the cross section perpendicular to the longitudinal direction of the louver 3 is a shape formed by an arc and a line (chord) connecting both ends of the arc.

Each of the louvers 3 is provided so that one side in the thickness direction is directed upward and the other side in the thickness direction is directed downward so that the thickness direction is the same as the predetermined direction A. The predetermined direction A is a direction that is perpendicular to the longitudinal direction Y of the road and that inclines from the road 2 toward one side thereof at an angle of, for example, 30 degrees with respect to the vertical direction Z. The transverse direction X, the longitudinal direction Y, and the vertical direction Z are perpendicular to each other, and the direction B in which the space 4 is perpendicular to the predetermined direction A is perpendicular to the longitudinal direction Y. With each louver 3 arranged in this manner, the louver body 17 of each louver 3 is arranged so as to be concave toward the road 2 located below, and a sound absorbing material is provided on the louver body 17 on the road 2 side. 18 are provided.

With each louver 3 thus supported by the support structure 5 and provided above one lane of the road 2, one side (one side) of the road 2 is passed through each louver 3 from this one lane. In other words, the space between the louvers 3 from one side lane of the road 2 toward the upper region portion 20a of the region 20 so that the upper region portion 20a of the region 20 adjacent to the lane side) cannot be seen through. Each louver 3 is arranged so that 4 does not penetrate. The predetermined direction A is:
One of a plurality of directions from the one side lane of the road 2 toward the upper region portion 20a. In the present embodiment, the louvers 3 are arranged so that the thickness direction of each louver 3 is inclined from the road toward one side thereof with respect to the vertical direction, and the cross direction X
, The space 4 of each louver 3 is configured so that the space is not inserted in each direction extending from the vertical direction Z to the transverse direction X and inclining from the road toward one side thereof. Therefore, as described above, it is configured such that the upper region portion 20a cannot be seen from one lane of the road 2.

The soundproof wall 7 is provided on one side of the road 2 and between the area 20. This soundproof wall 7 is a subgrade 1
A lower end portion is fixedly provided on the side of one of the two lanes on the outside of the column 15 (on the side away from the road 2). This soundproof wall 7 may be a wall made of concrete,
A wall made of a steel plate may be used as long as a sound insulating effect can be obtained. The holding body 14 of the support structure 5 is provided so as to extend on the road 2 from near the upper end of the soundproof wall 7.

The soundproofing device 1 is provided symmetrically in the transverse direction X of the road 2 as described above. At this time, the strut 15 or the like standing upright on the separation body 13 may be shared as the strut 15 for supporting another lane-shaped holding body 14 on the opposite side to one lane with respect to the separation body 13, Also, they may be provided individually.

According to such a soundproofing device 1, a plurality of louvers 3 are provided above the road 2, which is a noise generating area.
Each louver 3 can cover the road 2 from above. Each of the louvers 3 is arranged so that the space 4 that linearly penetrates in the predetermined direction A is not formed, and suppresses the vibration of air, which is noise, from propagating from the road 2 in the predetermined direction A. Can be. As a result, the noise generated when the car 8 runs on the road 2 is
Propagation to the upper region portion 20 a above the road 2 and in the predetermined direction A with respect to the road 2 can be suppressed by each louver 3. Further, as described above, the upper region portion 20 from one lane of the road 2 through each space 4.
Because it is configured so that you cannot see a
It is possible to reliably suppress the noise generated in one lane of the road 2 from propagating to the upper region portion 20a to be soundproofed. In other words, by providing the louvers so that the space 4 does not pass in the direction from the noise generation area to the soundproofing target area, it is possible to reliably suppress the propagation of noise from the noise generation area to the soundproofing target area. Therefore, even if there is a building such as a high-rise apartment where a high-rise floor portion is arranged in the soundproofing target area 20a, the propagation of noise to this building is suppressed, and the influence of the noise of this building is markedly reduced. Can be smaller.

The louvers 3 are separated from each other by spaces 4 that are linearly inserted in a direction B from a noise generation area, which is a direction B different from the predetermined direction A, to a region other than the soundproof target area. Air is placed in this space 4
Can reduce the resistance when moving. Therefore, the wind can easily blow through the space 4 between the louvers 3, and the soundproofing device 1, specifically, the soundproofing body 6
A large wind pressure load can be prevented from acting on the surface.
Furthermore, since the soundproofing device 1 does not need to have a large wind-proof load strength, the structure can be simplified, and the entire soundproofing device can be formed small and lightweight, and the soundproofing device 1 can be placed above the road 2 which is an outdoor noise generating area. The louver 3 can be easily provided.

With such a configuration, it is possible to easily realize the soundproofing device 1 that can suppress the propagation of noise from the road 2 to an area above the road 2 at low cost.

Further, the soundproof body 6 of the soundproof device 1 can be easily installed as described above, and each strut can be configured to be thin, and can be easily provided on the side of the road. Even when used together with the soundproof wall 7, a large occupied space is not required, and the soundproof wall 7 can be used together. Even when the existing soundproof wall 7 is provided on the road 2, the soundproof device 1 can be additionally installed later, so to speak, without greatly improving the road structure 9. By providing the soundproof body 6 and the soundproof wall 7 in this way, the propagation of noise generated on the road 2 to the side and upward can be suppressed. Moreover, even if the road 2 is covered from the side and above, the road 2 can be ventilated through the space 4 between the louvers 3, and there is no need to provide a separate ventilation means.

Each louver 3 has a shape in which the louver main body 17 is concave toward the road 2, so that even if the noise is reflected by each louver main body 17, the noise is directed to the opposite side of the road. Specifically, it can be made difficult to propagate to the soundproofing target area, and the effect of suppressing noise propagation can be enhanced.
Further, on the road 2 side of the louver body 17, a sound absorbing material 18 is provided, and the sound absorbing material 18 can absorb noise, in other words, absorb energy of air vibration and attenuate the noise. This also makes it possible to increase the noise propagation suppression effect. In this way, the noise suppression device 1 having a high effect by improving the effect of suppressing noise propagation can be realized.

Further, since each louver 3 is provided so that its thickness direction is the same as the predetermined direction A, the directional characteristics of the soundproofing device 1 can be minimized in the propagation of noise in the predetermined direction A. It can be a directional characteristic. Therefore, the effect of suppressing noise propagation in the predetermined direction A can be improved, and the soundproofing device 1 with a high effect can be realized.

FIG. 4 is a front view showing an experimental facility 25 for confirming the soundproofing effect of the present inventor, and FIG.
FIG. 2 is a perspective view showing an experimental facility 25. The experimental apparatus 25 has a frame 27 installed on a floor 26 of a laboratory, for example. The frame 27 is a lower frame 2 that is framed in a rectangular shape.
8, a pair of supporting columns 29 rising from both sides in the width direction.
However, a plurality of pairs are provided at intervals in the longitudinal direction of the lower frame 28, and a support member 30 is provided between upper ends of the columns 29 forming a pair.

The lower frame of the frame 27 is provided with a sound source 32 extending in the longitudinal direction at a position closer to one side in the width direction. In the support member 30, a plurality of grooves 31a that are inclined downward from the center to one side are formed at intervals from one side from the center in the width direction of the frame body 27, and are formed from the center in the width direction of the frame body 27. On the other side, a plurality of grooves 31b inclined downward from the center toward the other are formed at intervals. The test louvers 34 having a rectangular cross-section are fitted into the grooves 31a and 31b, and are supported by the support members 30 so as to be arranged above the sound source 32. In this state, each test louver 34 provided in each groove 31a is arranged so that a space between the test louvers 34 does not penetrate in a direction inclining toward one side in the width direction of the frame 27 as it goes upward. Each test louver 34 provided is:
In the direction inclining toward the other side in the width direction of the frame 27 as it goes upward, the spaces are arranged so that the space between them does not penetrate.
Each test louver 34 is made of acrylic.

Using this test equipment 25, a sound is generated from the sound source 32 at a frequency of 315 to 500 Hz in terms of the actual size, and the microphone 35 is placed on the upper semicircle around the sound source 32 having a radius of 500 mm. And the sound pressure level was measured. Each test louver 3 is provided in each groove 31a, 31b.
4, the sound pressure level was measured when not provided.

FIG. 6 is a semicircular graph showing the test results. In the semicircle graph, the angular position around the center O of the circle indicates the angular position around the sound source 32, and the distance from the center O indicates the sound pressure level. The closed circles ● indicate the sound pressure levels when the test louvers 34 are provided, and the open circles ○ indicate the test louvers 3.
4 shows a sound pressure level in a state in which No. 4 is provided. As is clear from the test results, it was confirmed that the louvers provided above the sound source had a soundproofing effect upward. Also, it was confirmed that a soundproofing effect was obtained in a direction in which the intervals between the louvers were not linearly inserted.

FIG. 7 is a perspective view showing a part of a soundproofing apparatus 1A according to another embodiment of the present invention. This soundproofing device 1A
Is similar to the soundproofing device 1 shown in FIGS. 1 to 6, and the description of the same configuration will be omitted. The soundproofing device 1A is
In addition to the configuration of the soundproofing device 1, an ejection unit 40 for atomizing and ejecting the liquid into the space 4 between the louvers 3, and an injection liquid supply unit 41 for supplying the liquid to the injection unit 40
And The injection means 40 has a plurality of nozzles 42 fixed on the upper surface side portion of each louver 3 at positions facing other adjacent louvers. The injection liquid supply means 41 includes:
Liquid having a liquid supply pipe 43 to which each nozzle 42 is connected, a pump for supplying the liquid under pressure, a motor for driving the pump, and a valve unit for adjusting the pressure and flow rate of the liquid supplied to each nozzle 42 And a source 44.

According to such a soundproofing device 1 A, in addition to the effect of the above soundproofing device 1, the liquid can be atomized and jetted into the space 4 between the louvers 3, and propagated to this space 4. The vibration energy of the air can be absorbed and attenuated by the atomized liquid, so that the noise transmitted between the louvers 3 can be absorbed. Therefore, even when the space is formed between the louvers 3 so that the wind pressure load can be reduced, it is possible to greatly suppress the noise leaking from the space 4 and being transmitted upward.
The soundproofing effect can be further improved.

The liquid is realized by, for example, water, can achieve a high sound absorbing effect, and is easy to handle. The liquid ejected from the ejecting means 40 is supplied by the ejecting liquid supply means 41, and the sound absorption characteristics can be easily adjusted by adjusting the supply amount of the liquid by the ejecting liquid supply means 41 by the valve unit. It can be adjusted to obtain the optimal sound absorption characteristics according to the noise level, and it always achieves a favorable sound absorption effect without the risk of deterioration due to aging as compared with the case where a sound absorbing material is used. As a result, the sound absorbing material does not fall off and is not lost, so that maintenance work is not troublesome and reliability can be improved.

In another embodiment of the present invention, each louver 3
Is composed of only the louver main body 17 having no sound absorbing material 18, thereby improving maintainability.
In such a configuration, it is preferable to provide a means for ejecting the above-described liquid. When the louver is composed of only the louver main body, the louver main body itself can have a sound absorbing effect by making the surface of the louver main body on the side of the noise generation area rough.

In another embodiment of the present invention, each louver 3 is configured to have a light transmitting property, and the illuminance on the road 2 is increased, so that the convenience can be improved. In such a louver, for example, the louver main body 17 may be formed of a translucent synthetic resin or the like, and the sound absorbing material 18 may be configured using fibers made of a translucent material. In addition, by providing only the louver main body 17 without providing the sound absorbing material 18, the light transmission can be further improved.

In another embodiment of the present invention, each louver 3 is provided so as to be angularly displaceable about the longitudinal axis, and a motor for driving each louver 3 for angular displacement about the longitudinal axis is provided. Can be angularly displaced to change the directional characteristics of the soundproof effect, thereby improving convenience.
At this time, the vehicle is detected by, for example, an optical detector embedded in the road surface, and when the vehicle does not pass, the louver 3 is controlled so that the space 4 is widened. The ventilation characteristics can be improved by setting the directional characteristics so as to enhance the soundproofing effect.
Further, for example, a sensor for detecting the frequency of the generated noise may be provided on the holder 14, and the louver 3 may be controlled in accordance with the frequency of the noise so that the noise of the frequency can be cut off most.

In another embodiment of the present invention, the space 4
When a means for injecting a liquid is provided, a means for heating the liquid is provided to inject hot water or the like to melt snow on the road surface and prevent snow accumulation.

In another embodiment of the present invention, the space 4
If a means for injecting liquid is provided, the vehicle is detected by an optical detector embedded in the road surface, and the liquid is injected only for a predetermined period of time when the vehicle has passed, so that useless injection of liquid is eliminated. Can be.

Further, the configuration can be changed within the scope of the present invention, and the shape and material of each member can be changed. For example, a louver having a rectangular or triangular cross section perpendicular to the longitudinal direction may be used as each louver. Further, each of the above soundproofing devices may be provided to obtain a soundproofing effect against noise generated on a track on which a tracked vehicle such as a new transportation system travels.

[0055]

As described above, according to the present invention, a plurality of louvers are provided above a road, and each louver can cover the road from above. Each louver extends in the longitudinal direction of the road, is provided side by side in the transverse direction, and is disposed so as not to form a space that is linearly inserted in a predetermined direction. Vibration of air, which is noise, propagates in the predetermined direction. Can be suppressed. Furthermore, since each louver is provided so that its thickness direction is the same as the predetermined direction, the directional characteristics of the soundproofing device may be set to the directional characteristics that can most suppress noise propagation in the predetermined direction. it can. This makes it possible to realize a soundproofing device having a high effect of suppressing the propagation of noise in the predetermined direction. The predetermined direction is a direction perpendicular to the longitudinal direction and inclined toward a side of the road with respect to the vertical direction. This makes it possible to suppress the propagation of noise from the road in a direction that is perpendicular to the longitudinal direction and that is inclined with respect to the vertical direction toward one side of the road, with a high propagation suppression effect. Therefore, it is perpendicular to the longitudinal direction with respect to the road,
In addition, the noise generated by the road propagates to a region existing in a direction inclined with respect to the vertical direction toward one side of the road, for example, to an upper region of a region adjacent to the road on one side. Can be suppressed.

Since the louvers capable of suppressing the propagation of noise are arranged with a space linearly inserted therebetween in a direction different from the predetermined direction, air or the like is disposed in the predetermined direction. The resistance when moving in a direction different from the above can be reduced. Therefore, the wind can easily blow through the space between the louvers, and it is possible to prevent a large wind pressure load from acting on the soundproofing device. This eliminates the need for the soundproofing device to have a large wind load resistance, so that the soundproofing device can have a simple configuration. Can be provided.

With such a configuration, it is possible to easily realize a soundproofing device capable of suppressing the propagation of noise from a noise generation area to an area above the noise generation area at low cost. This soundproofing device is provided, for example, in such a manner that each louver is provided above a road and a track, so that noise caused by running of the vehicle is prevented from being transmitted to a high-rise building provided adjacent to the road and the track. can do.

According to the present invention, each louver is formed in a crescent shape in which the louver body is concave toward the road, and even if noise is reflected by each louver, the louver is on the opposite side to the road. And the effect of suppressing noise propagation can be enhanced. In addition, a sound absorbing material is provided in the recess of the louver body, and thus on the road side, so that the sound absorbing material can absorb noise, in other words, absorb the energy of air vibration and attenuate the noise. Therefore, the effect of suppressing noise propagation can be enhanced. As described above, it is possible to realize a soundproofing device having a high effect by improving the effect of suppressing noise propagation.

Further, according to the present invention, since the liquid is atomized and ejected from the nozzle fixed to each louver to the space between the louvers, the vibration of the air transmitted to this space is reduced by the atomization. The vibration energy can be absorbed and attenuated by the liquid, and thus the noise transmitted between the louvers can be absorbed. Therefore, even when the space is formed between the louvers so that the wind pressure load can be reduced, it is possible to greatly suppress the noise from leaking from this space and propagate upward, and the soundproofing effect can be further improved. . Such a liquid is realized by, for example, water, can achieve a high sound absorbing effect, and is easy to handle. The liquid ejected from the ejecting means is supplied by the ejecting liquid supplying means, and by adjusting the amount of liquid supplied by the ejecting liquid supplying means, the sound absorption characteristics can be easily adjusted, and the noise level can be reduced. The sound absorbing material can be adjusted so as to obtain the optimum sound absorbing characteristics, and the sound absorbing material can be always achieved without the risk of deterioration due to aging as compared with the case of using the sound absorbing material. There is no dropout or loss, no maintenance work is required, and reliability can be improved.

[0060]

[0061]

[Brief description of the drawings]

FIG. 1 is a perspective view showing a part of a soundproofing device 1 according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the overall configuration of the soundproofing device 1 as viewed obliquely from above.

FIG. 3 is a sectional view showing the soundproofing device 1.

FIG. 4 is a front view showing the test equipment 25.

FIG. 5 is a perspective view showing a test facility 25.

FIG. 6 is a graph showing test results.

FIG. 7 is a perspective view showing a part of a soundproofing device according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1A Soundproofing device 2 Road 3 Louver 4 Space 5 Support structure 6 Soundproofing 7 Soundproof wall 8 Automobile 9 Road structure 14 Holder 15 Support 16 Beam 17 Louver body 18 Sound absorbing material 40 Injecting means 41 Liquid supply means 42 Nozzle

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-49-135304 (JP, A) Japanese Utility Model Application 58-171910 (JP, U) Japanese Utility Model Application 50-81609 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) E01F 8/00

Claims (3)

(57) [Claims] Claims: 1. An apparatus is provided above a road that exists outdoors.
It has a plurality of louvers extending in the longitudinal direction of the road, and each louver is a predetermined direction perpendicular to the longitudinal direction, and is inclined from the road toward one side of the vertical direction perpendicular to the longitudinal direction. The predetermined direction and the thickness direction of each louver are arranged in the transverse direction of the road so as to be the same, and are not linearly inserted in the predetermined direction and linearly in a direction intersecting the predetermined direction. A soundproofing device characterized by being arranged with a space for insertion. 2. Each of the louvers has a crescent shape in a cross section perpendicular to the longitudinal direction, and has a louver main body concave toward the road, and a sound absorbing material provided in a concave portion of the louver main body. The soundproofing device according to claim 1, characterized in that: 3. A jetting means for atomizing and jetting a liquid from the nozzle to a space between the louvers, the nozzle having a nozzle fixed at a position facing another louver adjacent to each louver; 3. The soundproofing device according to claim 1, wherein the means includes a jet liquid supply means for supplying the liquid.