JP2006342514A - Soundproof device of trenched road - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce sound from a trenched road, sufficiently ventilate the trenched road, and secure brightness in the road while reducing a flicker phenomenon. <P>SOLUTION: In this soundproof device 3 installed near the upper opening part 21 of the trenched road, a plurality of soundproof panels 4 formed of a translucent sound absorber and a translucent sound insulator are positioned parallel with each other in such a state that the upper opening part 21 of the trenched road is formed crosswise and tilted while forming ventilation spaces 5 at predetermined intervals so that a sunlight s does not strike a road surface 22 in a trench. In the trenched road extending approximately north and south, the soundproof panel 4 is desirably disposed to face north with an upward inclination so as to shield direct sunlight s. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a soundproofing device for preventing noise generated from a moat split road.

  In urban areas, roads with a moat split structure may be installed for environmental measures. The road with the moire split structure (see FIG. 5) has a substantially U shape with an open top, a function of reducing automobile noise by providing the road in the basement, and exhaust gas generated from the automobile from the upper opening 11. It has a function to ventilate and a function to illuminate the road by daylighting from the upper opening 11 in the daytime.

  However, due to an increase in traffic volume and an increase in the noise value due to the reflection of noise on the walls inside the moat, the noise radiated to the ground is not sufficiently reduced, and the sunlight s shining from the upper opening 11 on the road surface 13 There is a possibility that the safety may be impaired by making a shadow of the cross beam (strut) 12 and causing a flicker phenomenon (road surface flickering phenomenon). A technique for installing a sound-absorbing louver type soundproofing device 14 in which quality sound-absorbing materials and the like are arranged at regular intervals has been proposed (see FIG. 6). (See Patent Documents 1 and 2)

  However, when such a sound absorbing louver type soundproofing device 14 is installed, although the effect of flickering and noise reduction can be achieved, the upper opening 11 is blocked by the soundproofing device 14, and between the porous sound absorbing materials. Is provided with ventilation openings (ventilation openings), but the ventilation function is inadequate due to the small size per ventilation opening, the complicated ventilation path, and the small opening rate of about 50%. There was a problem that the field of view became dark and deteriorated due to dirt on the wall surface and smog accumulation.

Further, only a small amount of indirect light from the opening of the ventilation portion of the sound absorbing louver type soundproofing device 14 enters the road, and although the flicker phenomenon is reduced, the brightness in the road is remarkably lowered and it becomes dark like the inside of the tunnel. There was a problem that it was necessary to install electric lighting equipment. Furthermore, since the sound absorbing louver of the soundproofing device 14 has a complicated configuration in which a large number of sound absorbing materials processed into a dogleg shape are arranged vertically, there is a problem of high cost.
Japanese Patent Publication No. 53-111145, “Light-shielding, sound-absorbing louver” claim, description of FIG. Japanese Utility Model Publication No. 6-47932 “Sound-absorbing louver for vehicle traveling path ceiling”, description of FIG.

  The present invention has been made in order to solve the above-described problems, and can reduce the noise on the moat split road, and can provide sufficient ventilation, reducing the flicker phenomenon and ensuring the brightness in the road. Provide soundproofing equipment for Horiwari Road.

  The above problem is a soundproofing device installed near the upper opening of the Horiwari road, where a plurality of soundproofing panels are interposed in the ventilation space, and sunlight directly hits the road surface in the Horiwari through the ventilation space. This can be solved by the soundproofing device for the moat split road according to the present invention, which is characterized by being installed in a non-positional relationship.

  Moreover, the present invention can be embodied in the following first embodiment. That is, in the above invention, the soundproofing device is installed near the upper opening of the moat split road, and a plurality of soundproof panels composed of a translucent sound absorbing material and a translucent sound insulating material are horizontally mounted on the moat split road. It is a soundproofing device for a moat split road that is installed in parallel at a predetermined interval so that sunlight does not hit the road surface in the moat split. The present invention is further embodied in a form in which the soundproof panel is arranged with an upward slope toward the north side on a moat split road extending generally from north to south.

  Moreover, the present invention can be embodied in the following second embodiment. That is, in the above-described invention, the soundproofing device is installed near the upper opening of the moat split road, and the soundproofing panel composed of the light-transmitting sound absorbing material and the light-transmitting sound insulating material is arranged on the inner side from both side walls of the upper opening. A soundproofing device for a moat split road that is disposed so that one soundproof panel front end and the other soundproof panel front end are spaced apart from each other. The present invention is embodied in a form in which the front end of the soundproof panel extending from the south side wall of the opening is located above the front end of the soundproof panel extending from the north side wall on the moat split road extending generally from east to west. Is done.

  Furthermore, in these first and second embodiments of the present invention, it is preferable that the light-transmitting sound-absorbing material of the soundproof panel is a sound-absorbing material in which a light-transmitting film-like material and a porous plate are laminated.

The soundproofing device for the moat split road of the present invention has excellent effects as listed below. Therefore, the present invention has an extremely great industrial value as a soundproofing device that has solved the conventional problems.
(1) [Noise reduction effect] Since the soundproofing device is provided with a soundproofing panel in which a sound absorbing material and a sound insulating material are combined, the vehicle noise emitted from the upper part of the moat can be reduced by sound absorption, sound insulation and diffraction (diffraction of sound). Further, since direct solar radiation is blocked, the flicker phenomenon can be eliminated.

  (2) [Ventilation of exhaust gas] Since the size and area of the opening of the ventilation space of the soundproofing device are set large, the exhaust gas from the automobile is sufficiently ventilated, so there is no stagnation of exhaust gas in the road and visibility is improved. As a result, traffic safety is improved and dirt on the walls can be reduced.

  (3) [Illuminance on the road / Brightness of the road surface] Since a light-transmitting soundproof panel is used, the transmitted light that passes through the soundproof panel is added to the indirect light from the ventilation opening. In addition, by adjusting the translucency (transparency, etc.) of the soundproof panel, it is possible to alleviate the shadow of the horizontal surface of the road surface and reduce the change in the brightness of the road surface, thereby improving the safety of traffic.

  (4) [Cost] Since the soundproofing device has a simple structure with a flat sound-absorbing sound-insulating panel, the cost of the device is greatly reduced, and the installation of electric appliance lighting on the road becomes unnecessary. Economical.

Next, an embodiment according to a soundproofing device for a moat split road of the present invention will be described with reference to FIGS.
<< First Embodiment >>
As shown in FIGS. 1A and 1B, the first embodiment of the present invention is a soundproofing device 3 installed in the vicinity of the upper opening 21 of a moat split road, and will be described in detail later. When a plurality of soundproof panels 4 composed of a material and a translucent sound insulation material are juxtaposed in a state where the upper opening 21 of the moat split road is placed horizontally and inclined, and sunlight s directly hits the road surface 22 in the moat split. This is a soundproofing device for a moat split road that is installed with ventilation spaces 5 at predetermined intervals.

  This embodiment is particularly effective on a moat split road extending generally from north to south, and the configuration in which the soundproof panel 4 is disposed with an upward slope toward the north side (see FIG. 1B) is sunlight s. This is preferable because it blocks direct sunlight. In this case, “extending generally in the north-south direction” means a range from the north-south direction to the left and right, up to an angle of 45 °.

Further supplements are given below.
a) The soundproof panel 4 is installed along the upper part of the cross beam member (strut) 23 obliquely upward. Moreover, although the installation space | interval of the road extension direction of this soundproof panel 4 is corresponded to the ventilation space 5, the space | interval (about 5 m) of a cross beam material may be sufficient, but you may make a space | interval small. The interval is preferably 0.5 m to the interval (5 m) between the cross beam members. If it is too narrow, the ventilation function of the exhaust gas is lowered, and if it is too wide, the noise reduction effect is lowered.

b) The length of the soundproof panel 4 in the upward direction is set to a range that does not exceed the upper end of the upper opening 21 and is set to such an extent that sunlight s is blocked by the lower end of the adjacent soundproof panel while adjusting the angle. For example, the soundproof panel 4 is set up obliquely upward toward the north side, and the length is set to be longer than the length at which the sunlight at the south and middle altitudes (78.5 degrees) in the summer solstice does not directly illuminate the road surface. To do. Note that when the installation angle (angle with respect to the horizontal) is reduced, the noise reduction effect is improved, but the ventilation space is narrowed and the exhaust gas ventilation (effect) is reduced.
The soundproof panel 4 is fixed to a horizontal frame, a side wall directly, or a steel base with bolts. Further, it is preferable to attach a plate-like porous sound absorbing material 31 to at least the end of the soundproof panel 4 on the side walls 21a, 21b of the upper opening 21 to further improve the sound absorbing effect. In order to further increase the sound absorbing effect, a plate-like porous sound absorbing material 31 may be attached over the entire height of the side walls 21a, 21b.

[Translucent soundproof panel]
Next, the soundproof panel 4 of the present invention will be described (see FIG. 4).
In this soundproof panel 4, a translucent sound-absorbing material 41 and a translucent sound-insulating material 42 are formed into a panel with a metal frame member 44 at a predetermined interval (air layer 43).

(Translucent sound absorbing material)
The translucent sound absorbing material 41 is a translucent and translucent film-like material in which a porous plate is arranged on both sides or one side of a translucent film-like material, and the incident sound wave is film-like. The vibrational energy of the material is absorbed as frictional energy between the film-like material and the perforated plate.

  The translucent film-like material may be colorless or colored, transparent, non-transparent fluororesin film such as polyvinyl fluoride or polyethylene fluoride, polyester, polypropylene, polyvinyl chloride, polyethylene, polyethylene acetate, It is a non-light-shielding synthetic resin film such as vinylidene, and the thickness is preferably 6 μm to 500 μm.

  The perforated plate is made of a perforated plate or a net-like perforated plate made of a transparent or non-transparent polycarbonate, a synthetic resin such as polyvinyl chloride, or the like, glass, ceramic, aluminum, iron, etc. A net-like perforated plate such as a net made of a metal material or expanded metal, or a perforated plate-type perforated plate can also be used. There is no particular limitation on the material and the shape of the hole, but the size of one opening (hole) The thickness (diameter) is preferably 3 to 50 mm.

  As the perforated plate made of a translucent material, the above transparent, non-transparent, colored or colorless polycarbonate, synthetic resin such as polyvinyl chloride, or the like, a perforated plate such as glass or ceramic, or a net-like body is preferable. In this case, the aperture ratio of the porous plate is preferably 20 to 40% in order to ensure sound absorption. In addition, the degree of transparency and color of the multi-light plate is appropriately selected and adjusted according to the set luminance and illuminance of the road surface.

  The porous plate made of a non-translucent material is a perforated plate or a net-like body made of a metal material such as aluminum or iron, glass, ceramic, or synthetic resin. Is preferably 40% or more for ensuring sound absorption and translucency.

  The combination of the film-like material and the perforated plate is a two-layer structure in which one layer of the perforated plate is arranged on one side of the one-layer film-like material, or a perforated plate is arranged on both sides of the one-layer film-like material. In addition to the three-layer configuration, a one-layer film-like material is further added to the three-layer configuration, and the four-layer configuration is arranged on the surface of the perforated plate. However, there is no limitation. In the present invention, the lamination of the film-like material and the perforated plate means that the film-like material is configured in a proximity state in which friction occurs between the two due to vibration of the film-like material (the same applies hereinafter). In this case, in order to maintain the shape as a laminated panel, it is assumed that the outer peripheral portion and, if necessary, the intermediate portion are partially fixed with screws or the like.

In addition, since the vibration of the film material itself due to sound waves and the friction between the film material and the perforated plate can be sufficiently performed to exhibit sound absorption, the degree of tension of the film material at the time of lamination is required for sound absorption. Accordingly, it is preferable to adjust the slack allowance (in the range of −3% to 1%).
In addition, depending on how the film-like material is stretched, wrinkles may be formed and the appearance may be affected.

  In the case of laminating using a plurality of perforated plates as described above, the same material and the same opening size and opening ratio may be combined, or different materials, different opening sizes and opening ratios may be combined. The aperture ratio and translucency of the perforated plate are appropriately selected according to the set brightness and illuminance of the road surface.

(Panel frame material)
As the panel frame member 44 constituting the soundproof panel 4, a metal such as aluminum or iron or a synthetic resin such as vinyl chloride can be used. However, a frame member composed of four peripherals assembled from an aluminum alloy or a steel shape member is used. Most preferred.

(Translucent sound insulation)
The translucent sound insulating material 42 provided as the back plate of the soundproof panel 4 is a synthetic resin or rubber such as polycarbonate, vinyl chloride, methacrylic resin, styrene resin, ABS resin, fluorinated ethylene resin, acrylic resin, and is colorless or colored. And those having translucency (transparent and translucent) and those having translucency and transparency such as transparent and translucent glass are used alone or in a multilayer. Its size is determined by the size of the soundproof plate. The thickness is set from the required sound insulation (sound transmission loss), but is preferably 3 to 10 mm in the case of a plastic plate when used for a road noise barrier.

(Soundproof panel assembly and other supplementary items)
a) The soundproof panel 4 includes a light transmissive sound absorbing material 41, a panel frame material 44, and a light transmissive sound insulating plate 42. Each of these members is assembled into a panel using rivets, screws, adhesives, and the like. An air layer 43 is provided between the translucent sound absorbing material 41 and the sound insulating plate 42, and the entire thickness of the translucent soundproof panel 4 may be set in accordance with the frequency of the sound source. Decreasing the thickness improves the sound absorption coefficient in the high frequency region, and increasing the thickness increases the sound absorption coefficient in the low frequency region. Generally, a thickness of 50 to 200 mm is appropriate. The size of the soundproof panel is 0.5 to 2 m in width and 2 to 6 m in length. Furthermore, you may arrange | position a porous sound-absorbing material to the intermediate frame material etc. in a panel as needed.

  b) When assembling the translucent sound absorbing material 41 to the panel frame member 44, which side of the sound absorbing material 41 is the front side, for example, the perforated plate side of the translucent sound absorbing material having a two-layer structure is the front side ( The perforated plate may be on the sound source side and the membrane material is inside the panel), or the membrane material side may be on the front side (the membrane material is on the sound source side and the perforated plate is inside the panel). You can use it properly depending on the type.

c) As the translucent sound insulating material 42, a material subjected to a weather resistance treatment for ultraviolet rays or the like, a treatment for improving surface hardness, a reinforcement by a net or the like may be used. Further, the translucent sound absorbing material 41 may be subjected to a weather resistance treatment against ultraviolet rays or the like.
Furthermore, a photocatalyst such as titanium dioxide may be attached to the front, back, and inside of the soundproof panel 4 by coating or the like to prevent contamination and purify nitrogen oxides.

  In addition, in order to make it difficult to attach dirt substances such as automobile exhaust gas and soot in the atmosphere, and to facilitate the natural removal of deposits by rainwater, etc., as a dirt preventive agent, silicon polymer, fluorine A hydrophilic material such as a polymer or an acrylic polymer, or a water repellent material such as a silicon emulsion, an acrylic emulsion, a silicon acrylic emulsion, or an alkyl alkoxy run emulsion may be applied.

  d) As shown in FIG. 1, the translucent soundproof panel is installed directly on the cross beam member 23 provided along the moat split road, which is a noise source, or attached to a base made of H-shaped steel material with bolts or the like. . In this case, at the upper and lower ends of the translucent soundproof panel, holes (not shown) through which the wire ropes for prevention of dropping pass may be provided at the fitting portions and both ends when the soundproof plates are stacked and installed.

  e) When the translucent soundproof panel 4 of the present invention is configured as a double-sided sound-absorbing soundproof plate, the cross-sectional member configuration of the translucent soundproof panel is made of translucent sound-absorbing material + air layer + light-transmitting property. A light-transmitting sound-absorbing material is arranged on both surfaces, such as a sound insulating plate + an air layer + a light-transmitting sound-absorbing material.

  f) In the soundproof panel 4, a porous sound absorbing material may be disposed on an intermediate frame material inside the panel, if necessary. In addition, the soundproof panel 4 may be sound absorbing on one side or sound absorbing on both sides. Further, the soundproof panel 4 may be bent into an L shape or the like, or a silencer may be attached to the tip.

<< Second Embodiment >>
Next, a second embodiment of the present invention will be described (see FIGS. 2 and 3).
In this embodiment, as in the first embodiment, the soundproofing device is installed in the vicinity of the upper opening 21 of the moat split road, and the soundproofing panel 4 composed of a translucent sound absorbing material and a translucent sound insulating material is disposed on the upper portion. Extending inward from both side walls 21a and 21b of the opening, one soundproof panel front end 4a and the other soundproof panel front end 4b are provided vertically apart via a ventilation space 5, This is a soundproofing device for a moat split road installed so that s does not hit the road surface 22 in the moat split.

  This embodiment is particularly effective on a moat split road extending generally from east to west, and the soundproof panel front end 4b extending from the south side wall 21b of the opening is above the soundproof panel front end 4a extending from the north side wall 21a. It is preferable to use a configuration (see FIG. 2A) so as to prevent direct sunlight s. In this case, “extending approximately east-west” means a range from left to right and an angle of 45 ° centering on east-west.

  The soundproofing device of the present invention proposes two types of the first and second embodiments depending on the direction of the road, but considers the situation of the area where the moat split road is installed or planned to be installed and the direction of the road (east, west, north and south). At the same time, it is set as appropriate in consideration of noise reduction effect, exhaust gas ventilation, and indirect lighting in the road.

  In this second embodiment, the soundproof panel 4 is extended horizontally (see FIG. 3) or obliquely upward (see FIG. 2) from the walls (21a, 21b) on both sides of the upper section 21 of the moire split road toward the center of the road. It will be installed along the road in the direction of the road.

  In this case, the south side soundproof panel front end portion 4b is positioned above the north side soundproof panel front end portion 4a, and the length thereof is such that sunlight traveling downward from the upper soundproof panel front end portion 4b hits the lower soundproof panel. It is set not to irradiate the road surface 22 directly. For example, as shown in the figure, it may be set to a positional relationship in which sunlight at the south, middle altitude (summer solstice) does not directly irradiate the road surface.

Further, it is preferable to attach a plate-like porous sound absorbing material 31 to at least an intermediate portion of the side walls 21a, 21b of the upper opening portion 21 where the base portion of the soundproof panel 4 is located to further improve the sound absorbing effect. In order to further increase the sound absorbing effect, a plate-like porous sound absorbing material 31 may be attached over the entire height of the side walls 21a, 21b.
Furthermore, since the soundproof panel 4 in this embodiment is no different from the soundproof panel 4 of the first embodiment described above, all the structural explanations regarding the soundproof panel 4 described above are the same as those of the second embodiment. Is also applicable.

Further, a supplementary explanation will be given regarding the operation and effects of the present invention.
(Silence / soundproof)
Noise generated by driving a car on the moat split road is radiated upward through the ventilation space 5 between the soundproof panels 4 while being bent by the soundproof panel of the installed soundproofing device. It is attenuated by the effect of sound absorption and bending by the sound absorbing material of the light-proof soundproof plate. Note that the noise that tries to escape directly upward is shielded by the soundproof panel. Further, when noise is radiated from the opening 21, it is attenuated by diffraction due to the wall of the moat and the tip of the soundproof panel.

(Ventilation)
Exhaust gas generated from the automobile is released into the atmosphere by natural ventilation through the ventilation space 5 of the soundproofing device. Further, in the present invention, since the ventilation opening size can be increased in consideration of the ventilation performance, the exhaust gas stays in the road and the visibility is not hindered or the environment is not deteriorated.

(Brightness (brightness), illuminance)
Since the soundproof panel 4 of the present invention is translucent, the interior of the moat split road is illuminated by indirect light through the ventilation space 5 between the soundproof panels and transmitted light that passes through the soundproof panel 4 itself (in the case of daytime). Therefore, even if the indirect light changes depending on the installation interval or angle of the soundproof panel 4, the illuminance in the road is appropriately maintained by arbitrarily adjusting the transmitted light of the soundproof panel according to the condition setting of the sound absorbing material or sound insulating material. be able to. Furthermore, since the luminance change due to the shadow of the cross beam 23 can be reduced, the flicker phenomenon can be reduced.

  The brightness and color tone of the transmitted light of the soundproof panel 4 are the transparency and color of the film-like material of the translucent sound absorbing material, the transparency, color and aperture ratio of the multi-light board, and the transparency and color of the translucent sound insulating material, and the thickness Can be adjusted by selecting them alone or in combination.

  As described above, the soundproofing device of the present invention can be set to have a sufficiently large ventilation opening, and the soundproofing panel is installed so that sunlight does not enter the road directly. Because it is stabilized without significant change, traffic safety is improved. Further, since the road can be set brighter than the conventional soundproofing device, an advantage of improving traffic safety can be obtained.

The principal part sectional view for explaining a 1st embodiment of the present invention (A: the section which crosses the advancing direction, B: the section which follows the advancing direction). The principal part sectional view for explaining a 2nd embodiment (A: the section which crosses the advancing direction, B: the section along the advancing direction). The principal part sectional view for explaining modification of a 2nd embodiment (A: the section which crosses the advancing direction, B: the section along the advancing direction). The front view A, top view B, and side sectional view C of the soundproof panel used by this invention. The principal part sectional drawing for demonstrating a general moat split road (A: Cross section which crosses the advancing direction, B: Cross section along the advancing direction). Sectional drawing for demonstrating the conventional soundproofing apparatus installed in a moat split road (A: Cross section which crosses the advancing direction, B: Cross section along the advancing direction).

Explanation of symbols

21: upper opening, 21a, 21b: side wall, 22: road surface, 23: cross beam material 3: soundproofing device, 31: porous sound absorbing material 4: soundproofing panel, 41: translucent sound absorbing material, 42: translucent soundproofing Material 43: air layer 44: frame material 5: ventilation space s: sunlight

Claims (6)

  A soundproofing device installed near the upper opening of the Horiwari Road, with multiple soundproofing panels interposed in the ventilation space, and in a positional relationship where sunlight does not directly hit the road surface in the Horiwari through the ventilation space A soundproofing device for Horiwari Road.   A soundproofing device installed near the upper opening of the Horiwari road, with a plurality of soundproofing panels composed of a light-transmitting sound absorbing material and a light-transmitting soundproofing material being inclined over the Horiwari road The soundproofing device for a moat split road according to claim 1, wherein the soundproofing device is arranged in parallel and provided with a predetermined interval so that sunlight does not hit the road surface in the moat split.   The soundproofing device for a moat split road according to claim 2, wherein the soundproofing panel is arranged with an upward slope toward the north side in a moat split road extending generally from north to south.   A soundproofing device installed near the upper opening of the Horiwari road, wherein soundproofing panels composed of a translucent sound absorbing material and a translucent sound insulating material are extended inward from both side walls of the upper opening. The soundproofing device for a moat split road according to claim 1, wherein the soundproofing panel front end portion and the other soundproofing panel front end portion are arranged so as to be spaced apart from each other in the vertical direction.   5. The soundproofing of the moat split road according to claim 4, wherein the soundproofing panel extending from the south side wall of the opening is installed so that the tip of the soundproofing panel extending from the south side wall of the opening is located above the tip of the soundproofing panel extending from the north side wall. apparatus. The soundproofing device for a moat split road according to any one of claims 2 to 5, wherein the light-transmitting sound-absorbing material of the sound-proofing panel is a sound-absorbing material in which a light-transmitting film-like material and a porous plate are laminated.

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