JP2014101747A - Sound absorption panel and sound-proof wall facility - Google Patents

Sound absorption panel and sound-proof wall facility Download PDF

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JP2014101747A
JP2014101747A JP2013216713A JP2013216713A JP2014101747A JP 2014101747 A JP2014101747 A JP 2014101747A JP 2013216713 A JP2013216713 A JP 2013216713A JP 2013216713 A JP2013216713 A JP 2013216713A JP 2014101747 A JP2014101747 A JP 2014101747A
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sound
sound absorbing
outer frame
absorbing material
frame body
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JP6271213B2 (en
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Masakazu Kiyama
雅和 木山
Yasushi Hoshino
康 星野
Junichi Fukido
淳一 吹戸
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Nippon Sheet Glass Environment Amenity Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To prevent a sound at the side of a sound source from being spread at the back side of a sound-proof wall facility, while preventing a sound absorption performance from being reduced by wind and rain.SOLUTION: In a sound absorption panel 1B, a second sound absorption space 4B is formed inside, which is disposed further on a top-stage object among sound-proof panels 1A which are arranged side by side over a plurality of stages in a vertical direction, and in which a second sound absorption material 3B is packaged ; a second outer frame body 5B is provided which freely forms a partition wall for partitioning a sound source from the vicinity of the sound source; and a sound permeable surface with which a number of sound insertion holes which enables sounds to be inputted/outputted between the second sound absorption space 4B and the outside, is formed over a sound-source-side front face part 7 and a back face part 8 of the second outer frame body 5B. The sound permeable surface is also provided over a ceiling part 20 of the second outer frame body 5B, gaps are provided between an inner surface of the second outer frame body 5B and upper and lower longitudinal surface at front and rear sides and an upper surface in the second sound absorption material 3B, and an upper side of the second sound absorption material 3B is covered with a gas-permeable and water-repellent member 21.

Description

本発明は、例えば道路や鉄道などに設けられる吸音パネル及び防音壁設備に関し、詳しくは、第１吸音材を第１吸音空間に内装してある防音パネルを、上下方向に複数段に並べてある防音壁設備において、上下方向に複数段に並べてある前記防音パネルの内の最上段の物の更に上に配設し、第２吸音材を内装した第２吸音空間を内部に形成すると共に、音源とその音源の周囲とを隔てる隔壁を形成自在な第２外枠体を設け、前記第２吸音空間とその外方とにわたる音の出入りを可能にする音挿通孔を多数設けてある音透過面を、前記第２外枠体の音源側表面部及び、背面部に形成してある吸音パネル、及び、その吸音パネルを使用した防音壁設備に関する。   The present invention relates to a sound-absorbing panel and sound-insulating wall equipment provided, for example, on roads and railways, and more specifically, a sound-insulating panel in which a first sound-absorbing material is arranged in a first sound-absorbing space and arranged in a plurality of stages in the vertical direction. In the wall equipment, a sound-absorbing panel is arranged above the topmost one of the soundproof panels arranged in a plurality of stages in the vertical direction, and a second sound-absorbing space is provided inside the second sound-absorbing material. A sound transmitting surface is provided with a second outer frame body that can form a partition wall that separates the sound source from the sound source, and a plurality of sound insertion holes that allow sound to enter and exit from the second sound absorbing space and the outside thereof. The present invention relates to a sound absorbing panel formed on a sound source side surface portion and a back surface portion of the second outer frame body, and a soundproof wall facility using the sound absorbing panel.

従来、防音壁設備は、前記防音パネルを上下方向に複数段に並べて設置してあるだけであって、夫々それらの吸音空間に内装した吸音材に、面密度が一定の同じ吸音性能の物を使用しており、各防音パネルの音源側表面部は音透過面に形成してあるのに対して、背面側には剛面を設けてあり、遮音壁機能を備えさせていた（例えば、特許文献１参照）。
そのために、上下方向に並べた防音パネルの音源側とその背面側とでは音圧差が大きく、防音壁設備の上端縁近傍の領域に加速された音のエネルギーが回折現象を発生させて、防音壁設備の背面側の住宅側に、回折した音が拡がるという問題があった。
そこで問題を解決すべく、上下方向に複数段に並べてある前記防音パネルの内の最上段の物の更に上に配設し、第２吸音材を内装した第２吸音空間を内部に形成すると共に、音源とその音源の周囲とを隔てる隔壁を形成自在な第２外枠体を設け、前記第２吸音空間とその外方とにわたる音の出入りを可能にする音挿通孔を多数設けてある音透過面を、前記第２外枠体の音源側表面部及び、背面部に形成してある吸音パネル、を配設するという提案があった（例えば、特許文献２参照）。 Conventionally, the soundproofing wall equipment has only the soundproofing panels arranged in a plurality of stages in the vertical direction, and the sound absorbing material installed in each of the sound absorbing spaces has the same sound absorbing performance with a constant surface density. The sound source side surface portion of each soundproof panel is formed on the sound transmission surface, whereas the back surface is provided with a rigid surface and has a sound insulation wall function (for example, Patent Documents) 1).
For this reason, there is a large difference in sound pressure between the sound source side and the back side of the sound insulation panels arranged in the vertical direction, and the energy of the accelerated sound in the region near the top edge of the sound insulation equipment causes a diffraction phenomenon, resulting in a sound insulation wall. There was a problem that the diffracted sound spread to the housing side on the back side of the facility.
Therefore, in order to solve the problem, a second sound-absorbing space is provided inside the sound-insulating panel arranged in a plurality of stages in the vertical direction, and is further disposed above the top-most object, and includes a second sound-absorbing material. The sound is provided with a second outer frame body that can form a partition wall that separates the sound source and the periphery of the sound source, and has many sound insertion holes that allow sound to enter and exit the second sound absorbing space and the outside thereof. There has been a proposal that a transmission surface is provided with a sound absorbing panel formed on a sound source side surface portion and a back surface portion of the second outer frame (see, for example, Patent Document 2).

特開平７−３００８２２号公報JP-A-7-300822 国際公開第２０１２／１０２２７８号International Publication No. 2012/102278

上述した従来の吸音パネルでは、上下方向に複数段に並べてある前記防音パネルの内の最上段の物の上端縁近傍を回折しようとする回折音を、低減させることができる。
しかし、吸音パネルを設けた防音壁設備は、雨にさらされる場所での設置であるために、吸音性能を低下させないためにも、吸音パネルの天井部に雨除け用のキャップが設けられている。
そして、その雨除け用のキャップがあるために、キャップの前後で音圧差が大きくなり、音の回折現象の低減機能が妨げられる虞があった。 In the conventional sound absorbing panel described above, it is possible to reduce the diffracted sound that is diffracted near the upper edge of the uppermost one of the soundproof panels arranged in a plurality of stages in the vertical direction.
However, since the soundproof wall equipment provided with the sound absorbing panel is installed in a place exposed to rain, a cap for rain protection is provided on the ceiling of the sound absorbing panel in order not to deteriorate the sound absorbing performance. .
And since there is a cap for preventing rain, there is a possibility that the sound pressure difference becomes large before and after the cap, and the function of reducing the sound diffraction phenomenon may be hindered.

従って、本発明の目的は、上記問題点を解消し、雨による吸音性能を低減させずに、音源側の音が防音壁設備の背面側に拡がるのを防止できるようにするところにある。   Accordingly, an object of the present invention is to solve the above problems and prevent the sound on the sound source side from spreading to the back side of the soundproof wall equipment without reducing the sound absorption performance due to rain.

本発明の吸音パネルの第１の特徴構成は 第１吸音材を第１吸音空間に内装してある防音パネルを、上下方向に複数段に並べてある防音壁設備において、上下方向に複数段に並べてある前記防音パネルの内の最上段の物の更に上に配設し、第２吸音材を内装した第２吸音空間を内部に形成すると共に、音源とその音源の周囲とを隔てる隔壁を形成自在な第２外枠体を設け、前記第２吸音空間とその外方とにわたる音の出入りを可能にする音挿通孔を多数設けてある音透過面を、前記第２外枠体の音源側表面部及び、背面部に形成してある吸音パネルであって、前記音透過面を、第２外枠体の天井部にも設け、前記第２外枠体の内面に対して前記第２吸音材における表裏の上下縦面、及び、上面との間に間隙を設け、前記第２吸音材の上方を通気性のある撥水部材２１で覆ったところにある。   The first characteristic configuration of the sound absorbing panel according to the present invention is that the soundproofing panel in which the first sound absorbing material is housed in the first sound absorbing space is arranged in a plurality of stages in the vertical direction, and is arranged in a plurality of stages in the vertical direction. Arranged above the topmost one of the soundproof panels to form a second sound-absorbing space with a second sound-absorbing material inside, and to form a partition that separates the sound source from the sound source. A sound transmitting surface provided with a large number of sound insertion holes for allowing sound to enter and exit from the second sound absorbing space and the outside of the second sound absorbing space, and a sound source side surface of the second outer frame. And a sound absorbing panel formed on the back surface, wherein the sound transmitting surface is also provided on a ceiling portion of the second outer frame body, and the second sound absorbing material with respect to the inner surface of the second outer frame body A gap is provided between the upper and lower vertical surfaces of the front and back and the upper surface of the second sound absorbing material. There is to covered by the water-repellent member 21 with sex.

本発明の第１の特徴構成によれば、一般的に最上段の防音パネルの上端縁部上方空間において、その上端縁部に近い部分ほど音を伝える空気の粒子の流速が加速されやすい。
そこで、例えば道路などの音源側で発生した音の大部分は上下方向に複数段に並べてある防音パネル夫々の第１吸音空間に内装した第１吸音材で吸収され、尚且つ、複数段の防音パネルの内の最上段のものの上端縁部から背面側に回折しようとする音が、第２吸音材で吸収されながらその振動エネルギーが減衰される。
しかも、音透過面を、第２外枠体の天井部にも設け、前記第２外枠体の内面に対して前記第２吸音材における表裏の上下縦面、及び、上面との間に間隙を設け、前記第２吸音材の上方を通気性のある撥水部材で覆ってあるために、第２吸音材を透過しようとする空気の流れが、第２外枠体の天井部で遮られて、天井部近傍との大きな音圧差をつけることが防止されるために、音源側の音が防音壁設備の背面側に拡がるという音の回折現象を防止できるようになる。
また、第２外枠体の天井部を音透過面に形成することによる第２吸音空間への雨水の侵入を、通気性のある撥水部材で第２吸音材の上方を覆うことにより防止でき、結局、吸音性能を維持しながら音源側の音が防音壁設備の背面側に拡がるのを防止できる。 According to the first characteristic configuration of the present invention, generally, in the space above the upper end edge of the uppermost soundproof panel, the flow velocity of air particles that transmit sound tends to be accelerated closer to the upper end edge.
Therefore, for example, most of the sound generated on the sound source side such as a road is absorbed by the first sound absorbing material provided in the first sound absorbing space of each of the soundproof panels arranged in a plurality of stages in the vertical direction, and the soundproofing of the plurality of stages is performed. The vibration energy is attenuated while the sound to be diffracted from the upper edge of the uppermost panel of the panel to the back side is absorbed by the second sound absorbing material.
In addition, a sound transmission surface is also provided on the ceiling of the second outer frame body, and a gap is formed between the upper and lower vertical surfaces of the second sound absorbing material and the upper surface with respect to the inner surface of the second outer frame body. And the upper part of the second sound absorbing material is covered with a water-repellent water repellent member, so that the air flow trying to pass through the second sound absorbing material is blocked by the ceiling portion of the second outer frame body. Thus, since a large sound pressure difference with the vicinity of the ceiling is prevented, it is possible to prevent the sound diffraction phenomenon that the sound on the sound source side spreads to the back side of the soundproof wall equipment.
In addition, it is possible to prevent rainwater from entering the second sound absorbing space by forming the ceiling portion of the second outer frame body on the sound transmitting surface by covering the second sound absorbing material with a breathable water repellent member. As a result, it is possible to prevent the sound on the sound source side from spreading to the back side of the soundproof wall equipment while maintaining the sound absorbing performance.

本発明の第２の特徴構成は、前記撥水部材は、前記第２吸音材の少なくとも表裏の前記上下縦面いずれか一方側に雨水が流下する水勾配を形成するように支持されている撥水性の布である。   According to a second characteristic configuration of the present invention, the water repellent member is supported so as to form a water gradient on which at least one of the top and bottom vertical surfaces of the second sound absorbing material flows down rainwater. It is an aqueous cloth.

本発明の第２の特徴構成によれば、第２外枠体の天井部を透過して第２吸音空間に侵入しようとする雨水は、水勾配のある撥水部材で受け止められながら流下することで、第２吸音材が雨水を含んで吸音性能を低下させてしまうのを防止できる。   According to the second characteristic configuration of the present invention, the rainwater that tries to enter the second sound absorbing space through the ceiling of the second outer frame body flows down while being received by the water repellent member having a water gradient. Thus, it is possible to prevent the second sound absorbing material from containing rainwater and reducing the sound absorbing performance.

本発明の第３の特徴構成は、前記撥水部材における水勾配の下流側に、前記第２吸音材の前記上下縦面よりも外方側に延設する軒部を形成したところにある。   The 3rd characteristic structure of this invention exists in the place which formed the eaves part extended in an outward side rather than the said up-and-down vertical surface of a said 2nd sound-absorbing material in the downstream of the water gradient in the said water-repellent member.

本発明の第３の特徴構成によれば、撥水部材で受け止めた雨水は、その水勾配に従って流れながら、更に軒部を流下して下方に落下することで、第２吸音材が雨水に濡れて含水してしまい、吸音性能を低下させてしまうのを一層防止できる。   According to the third characteristic configuration of the present invention, the rainwater received by the water repellent member flows along the water gradient, and further flows down the eaves part and falls downward, so that the second sound absorbing material is wetted by the rainwater. Thus, it is possible to further prevent the water absorption and the sound absorption performance from being deteriorated.

本発明の第４の特徴構成は、前記撥水部材を、前記第２外枠体の天井部よりも下側に配設したところにある。   The 4th characteristic structure of this invention exists in the place which has arrange | positioned the said water repellent member below the ceiling part of the said 2nd outer frame.

本発明の第４の特徴構成によれば、撥水部材を、前記第２外枠体の天井部よりも下側に配設することにより、第２外枠体により撥水部材が保護され、長期にわたる撥水性能を維持できる。   According to the fourth characteristic configuration of the present invention, the water-repellent member is protected by the second outer frame body by disposing the water-repellent member below the ceiling of the second outer frame body, Long-term water repellency can be maintained.

本発明の第５の特徴構成は、前記第２吸音材の底部の下側に、前記第２外枠体の内部に侵入した雨水を前記外枠体の長手方向に沿って排水する排水溝を形成するように支持する吸音材支持部を、前記第２外枠体に設けたところにある。   According to a fifth characteristic configuration of the present invention, a drainage groove for draining rainwater that has entered the inside of the second outer frame body along the longitudinal direction of the outer frame body is provided below the bottom of the second sound absorbing material. The sound absorbing material support portion that supports the formation is formed in the second outer frame body.

本発明の第５の特徴構成によれば、第２吸音空間に侵入した雨水は、撥水部材によって第２吸音材が濡れるのを防止して、下方に流下した雨水が第２外枠体に設けた排水溝によって外枠体の長手方向に排出させることができ、吸音支持部で支持された第２吸音材が吸水してその吸音性能を低下させる心配を防止できる。   According to the fifth characteristic configuration of the present invention, the rainwater that has entered the second sound absorbing space prevents the second sound absorbing material from getting wet by the water repellent member, and the rainwater that has flowed downwards into the second outer frame body. The drainage groove provided can be discharged in the longitudinal direction of the outer frame, and it is possible to prevent the second sound-absorbing material supported by the sound-absorbing support part from absorbing water and lowering its sound-absorbing performance.

本発明の第６の特徴構成は、前記第２吸音材が、ポリエステル繊維ウールから成る多孔質材から成形されているところにある。   A sixth characteristic configuration of the present invention is that the second sound absorbing material is molded from a porous material made of polyester fiber wool.

本発明の第６の特徴構成によれば、多孔質材のポリエステル繊維ウールで第２吸音材が成形されていることにより、吸音材を軽量で安価に提供できる。   According to the sixth characteristic configuration of the present invention, since the second sound absorbing material is formed of the polyester fiber wool of the porous material, the sound absorbing material can be provided at a low cost at a low cost.

本発明の第７の特徴構成は、前記第２吸音材の面密度を０．９〜１００ｋｇ／ｍ2で、その流れ抵抗値を４００〜４０００Ｎ・ｓ／ｍ3に設定したところにある。 A seventh characteristic configuration of the present invention is that the surface density of the second sound absorbing material is set to 0.9 to 100 kg / m 2 and the flow resistance value is set to 400 to 4000 N · s / m 3 .

本発明の第７の特徴構成によれば、吸音性能を高く維持できる。   According to the seventh characteristic configuration of the present invention, the sound absorption performance can be maintained high.

本発明の防音壁設備の第８の特徴構成は、第１吸音材を第１吸音空間に内装してある防音パネルを、上下方向に複数段に並べ、上下方向に複数段に並べてある前記防音パネルの内の最上段の物の更に上に、第２吸音材を内装した第２吸音空間を内部に形成すると共に、音源とその音源の周囲とを隔てる隔壁を形成自在な第２外枠体を設け、前記第２吸音空間とその外方とにわたる音の出入りを可能にする音挿通孔を多数設けてある音透過面を、前記第２外枠体の音源側表面部及び、背面部に形成すると共に、前記音透過面を、第２外枠体の天井部にも設け、前記第２外枠体の内面に対して前記第２吸音材における表裏の上下縦面、及び、上面との間に間隙を設け、前記第２吸音材の上方を通気性のある撥水部材で覆ってある吸音パネルを配設したところにある。   According to an eighth characteristic configuration of the soundproof wall equipment of the present invention, the soundproofing panel in which the first sound absorbing material is arranged in the first sound absorbing space is arranged in a plurality of stages in the vertical direction and in a plurality of stages in the vertical direction. A second outer frame that forms a second sound-absorbing space with a second sound-absorbing material inside and further forms a partition that separates the sound source and the periphery of the sound source on the top of the panel. A sound transmitting surface provided with a number of sound insertion holes that allow sound to enter and exit from the second sound absorbing space and the outside thereof, on the sound source side surface portion and the back surface portion of the second outer frame body The sound transmitting surface is also provided on the ceiling of the second outer frame body, and the upper and lower vertical surfaces on the front and back of the second sound absorbing material with respect to the inner surface of the second outer frame body, and the upper surface A sound absorbing panel is provided with a gap in between and the second sound absorbing material covered with a breathable water-repellent member. In the place it was.

本発明の第８の特徴構成によれば、一般的に最上段の防音パネルの上端縁部上方空間において、その上端縁部に近い部分ほど音を伝える空気の粒子の流速が加速されやすい。
そこで、例えば道路などの音源側で発生した音の大部分は上下方向に複数段に並べてある防音パネル夫々の第１吸音空間に内装した第１吸音材で吸収され、尚且つ、複数段の防音パネルの内の最上段のものの上端縁部から背面側に回折しようとする音が、第２吸音材で吸収されながらその振動エネルギーが減衰される。
しかも、音透過面を、第２外枠体の天井部にも設け、前記第２外枠体の内面に対して前記第２吸音材における表裏の上下縦面、及び、上面との間に間隙を設け、前記第２吸音材の上方を通気性のある撥水部材で覆ってあるために、第２吸音材を透過しようとする空気の流れが、第２外枠体の天井部で遮られて、天井部近傍との大きな音圧差をつけることが防止されるために、音源側の音が防音壁設備の背面側に拡がるという音の回折現象を防止できるようになる。
また、第２外枠体の天井部を音透過面に形成することによる第２吸音空間への雨水の侵入を、通気性のある撥水部材で第２吸音材の上方を覆うことにより防止でき、結局、吸音性能を維持しながら音源側の音が防音壁設備の背面側に拡がるのを防止できる。
従って、防音壁設備全体として例えば道路上の音源からの周辺住居地域への拡散を、効果的に防止できる。 According to the eighth characteristic configuration of the present invention, generally, in the space above the upper end edge of the uppermost soundproof panel, the flow velocity of the air particles that transmit sound tends to be accelerated closer to the upper end edge.
Therefore, for example, most of the sound generated on the sound source side such as a road is absorbed by the first sound absorbing material provided in the first sound absorbing space of each of the soundproof panels arranged in a plurality of stages in the vertical direction, and the soundproofing of the plurality of stages is performed. The vibration energy is attenuated while the sound to be diffracted from the upper edge of the uppermost panel of the panel to the back side is absorbed by the second sound absorbing material.
In addition, a sound transmission surface is also provided on the ceiling of the second outer frame body, and a gap is formed between the upper and lower vertical surfaces of the second sound absorbing material and the upper surface with respect to the inner surface of the second outer frame body. And the upper part of the second sound absorbing material is covered with a water-repellent water repellent member, so that the air flow trying to pass through the second sound absorbing material is blocked by the ceiling portion of the second outer frame body. Thus, since a large sound pressure difference with the vicinity of the ceiling is prevented, it is possible to prevent the sound diffraction phenomenon that the sound on the sound source side spreads to the back side of the soundproof wall equipment.
In addition, it is possible to prevent rainwater from entering the second sound absorbing space by forming the ceiling portion of the second outer frame body on the sound transmitting surface by covering the second sound absorbing material with a breathable water repellent member. As a result, it is possible to prevent the sound on the sound source side from spreading to the back side of the soundproof wall equipment while maintaining the sound absorbing performance.
Therefore, for example, the entire soundproof wall equipment can be effectively prevented from spreading from the sound source on the road to the surrounding residential area.

本発明の第９の特徴構成は、前記第２吸音材が上端部側ほどその流れ抵抗値及び面密度が小さくなるように形成されているところにある。   According to a ninth characteristic configuration of the present invention, the second sound absorbing material is formed such that the flow resistance value and the surface density become smaller toward the upper end side.

本発明の第９の特徴構成によれば、第２吸音材が上端部側ほどその流れ抵抗値及び面密度が小さくなるように形成されていることにより、効果的に音の回折現象を減少させることができる。   According to the ninth characteristic configuration of the present invention, the second sound absorbing material is formed so that the flow resistance value and the surface density thereof become smaller toward the upper end portion, thereby effectively reducing the sound diffraction phenomenon. be able to.

本発明の第１０の特徴構成は、前記第２外枠体の上下幅を、前記第１外枠体の上下幅より小に形成したところにある。   According to a tenth feature of the present invention, the vertical width of the second outer frame is formed smaller than the vertical width of the first outer frame.

本発明の第１０の特徴構成によれば、複数段に上下に並べられた防音パネルの更に上方に、吸音パネルを設置する際に、防音壁設備全体として邪魔になることなく高い防音性能の設置物に形成できる。   According to the 10th characteristic structure of this invention, when installing a sound-absorbing panel further above the sound-insulation panel arranged up and down in multiple steps, installation of a high sound-insulation performance without interfering with the entire sound-proof wall equipment Can be formed into objects.

防音壁設備の全体斜視図である。It is the whole soundproof wall equipment perspective view. 防音壁設備の設置状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the installation state of a soundproof wall equipment. 第１実施形態の吸音パネルの正面図である。It is a front view of the sound absorption panel of a 1st embodiment. 第１実施形態の吸音パネルの背面図である。It is a rear view of the sound absorption panel of 1st Embodiment. 第１実施形態の吸音パネルの平面図である。It is a top view of the sound absorption panel of a 1st embodiment. 第１実施形態の吸音パネルの底面図である。It is a bottom view of the sound absorption panel of a 1st embodiment. 第１実施形態の吸音パネルの側面図（左右同形）である。It is a side view (left-right isomorphism) of the sound-absorption panel of 1st Embodiment. 第１実施形態の吸音パネルの全体斜視図である。It is the whole sound absorption panel perspective view of a 1st embodiment. 第１実施形態の吸音パネルの縦断面図である。It is a longitudinal cross-sectional view of the sound absorption panel of 1st Embodiment. 第２実施形態の防音壁設備の全体正面図である。It is a whole front view of the soundproof wall equipment of 2nd Embodiment. 第２実施形態の防音壁設備の設置状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the installation state of the soundproof wall equipment of 2nd Embodiment. 第２実施形態の吸音パネルの正面図である。It is a front view of the sound absorption panel of 2nd Embodiment. 第２実施形態の吸音パネルの背面図である。It is a rear view of the sound absorption panel of 2nd Embodiment. 第２実施形態の吸音パネルの平面図である。It is a top view of the sound absorption panel of 2nd Embodiment. 第２実施形態の吸音パネルの底面図である。It is a bottom view of the sound absorption panel of 2nd Embodiment. 第２実施形態の吸音パネルの側面図（左右同形）である。It is a side view (left-right same shape) of the sound-absorption panel of 2nd Embodiment. 第２実施形態の吸音パネルの斜視図である。It is a perspective view of the sound absorption panel of 2nd Embodiment. 第２実施形態の吸音パネルの縦断面図である。It is a longitudinal cross-sectional view of the sound absorption panel of 2nd Embodiment. 第２実施形態の吸音パネルを設置した状態の縦断面図である。It is a longitudinal cross-sectional view of the state which installed the sound absorption panel of 2nd Embodiment. 第３実施形態の吸音パネルの縦断面図である。It is a longitudinal cross-sectional view of the sound absorption panel of 3rd Embodiment. 第３実施形態の吸音パネルの上部縦断面図である。It is an upper part longitudinal cross-sectional view of the sound absorption panel of 3rd Embodiment. 第３実施形態の吸音パネルの下部縦断面図である。It is a lower part longitudinal cross-sectional view of the sound absorption panel of 3rd Embodiment. 第３実施形態の吸音パネルの上部分解斜視図である。It is a top exploded perspective view of a sound absorption panel of a 3rd embodiment. 第３実施形態の吸音パネルの下部分解斜視図である。It is a lower part exploded perspective view of a sound absorption panel of a 3rd embodiment. 第４実施形態の吸音パネルの縦断面図である。It is a longitudinal cross-sectional view of the sound absorption panel of 4th Embodiment. 第４実施形態の吸音パネルの上部縦断面図である。It is an upper part longitudinal cross-sectional view of the sound absorption panel of 4th Embodiment. 第４実施形態の吸音パネルの下部縦断面図である。It is a lower part longitudinal cross-sectional view of the sound absorption panel of 4th Embodiment. 第４実施形態の吸音パネルの上部分解斜視図である。It is a top exploded perspective view of the sound-absorption panel of a 4th embodiment. 第４実施形態の吸音パネルの下部分解斜視図である。It is a lower part exploded perspective view of the sound-absorption panel of a 4th embodiment. 各種吸音パネルの要部の概略縦断面図で、（ａ）は第１実施形態、（ｂ）と、（ｃ）は、夫々異なる実施形態である。It is a schematic longitudinal cross-sectional view of the principal part of various sound-absorbing panels, (a) is 1st Embodiment, (b) and (c) are each different embodiment. 図３０の実施形態の音の回折現象抑制効果を表すグラフである。It is a graph showing the diffraction effect suppression effect of the sound of embodiment of FIG. 第２外枠体の上面と第２吸音材の上面との間の隙間と、空気粒子流れ抵抗との関係を示すグラフである。It is a graph which shows the relationship between the clearance gap between the upper surface of a 2nd outer frame, and the upper surface of a 2nd sound-absorbing material, and air particle flow resistance.

以下に本発明の実施の形態を図面に基づいて説明する。
図１、図２に示すように、例えば道路等の防音壁設備は、道路の側方において道路とその周辺とを隔てるように、道路に沿って一定間隔置きに立設させたパネル支持用Ｈ型鋼１０の縦溝内に、パネル１を上下方向に複数段に積み上げた状態で、道路に沿って並べて設置することで構成されている。 Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 and 2, for example, a soundproof wall facility such as a road is provided with panel support H erected at regular intervals along the road so as to separate the road and its periphery on the side of the road. In the vertical groove of the steel plate 10, the panels 1 are arranged side by side along the road in a state where the panels 1 are stacked in a plurality of stages in the vertical direction.

[第１実施形態]
図１、図２に示すように、前記パネル１は、コンクリート製の基礎外壁２の上に上下方向に複数段に積み上げる防音パネル１Ａと、その防音パネル１Ａの最上段の物の更に上に配設する吸音パネル１Ｂとからなり、いずれの防音パネル１Ａも第２吸音パネル１Ｂも、夫々の左右両端部を、横方向に隣接するパネル支持用Ｈ型鋼１０の夫々の縦溝内に嵌入させてある。
図１、図２に示すように、防音パネル１Ａは、グラスウールからなる第１吸音材３Ａを内装した第１吸音空間４Ａを内部に形成すると共に、音源となる道路とその道路の周囲とを隔てる隔壁を形成自在な金属板から成る第１外枠体５Ａを設け、第１吸音空間４Ａに外方の音を取り入れ自在な音導入孔６を多数形成してあるガラリ構造からなる音透過面を、第１外枠体５Ａの音源側表面部７に形成すると共に、第１外枠体５Ａの音源側とは反対側の背面部８には孔の開いてない鉄板製の遮音板を設けて、道路側からの発生音を防音壁の背面側には逃がさないように構成してある。
図５〜図８中の１４は、吸音パネル１Ｂを、パネル支持用Ｈ型鋼１０に設置してＨ形鋼との間に上部より固定用ばね鋼材を打ち込んで固定した後に、パネル支持用Ｈ型鋼１０に連結したワイヤー（図外）を通す切り欠き部で、図中の１５は、切り欠き部１４と同時に通すアイボルトで、パネル支持用Ｈ型鋼１０からの吸音パネル１Ｂの脱落を防止してある。 [First embodiment]
As shown in FIG. 1 and FIG. 2, the panel 1 is arranged on a concrete foundation outer wall 2 and stacked on a soundproof panel 1A stacked in a plurality of levels in the vertical direction, and further on the topmost object of the soundproof panel 1A. Each soundproof panel 1A and second sound absorption panel 1B has both left and right ends fitted into respective longitudinal grooves of the H-steel 10 for panel support adjacent in the horizontal direction. is there.
As shown in FIGS. 1 and 2, the soundproof panel 1 </ b> A forms a first sound absorbing space 4 </ b> A in which a first sound absorbing material 3 </ b> A made of glass wool is internally provided, and separates a road serving as a sound source from the periphery of the road. The first outer frame 5A made of a metal plate capable of forming a partition wall is provided, and a sound transmission surface having a louver structure in which a large number of sound introduction holes 6 are formed in the first sound absorbing space 4A to be able to take in outside sound. In addition, a sound insulating plate made of iron plate with no holes is provided on the back surface portion 8 on the side opposite to the sound source side of the first outer frame body 5A. The sound generated from the road side is configured not to escape to the back side of the soundproof wall.
5 to 8, reference numeral 14 denotes a panel-supporting H-shaped steel after the sound-absorbing panel 1B is installed on the panel-supporting H-shaped steel 10 and a fixing spring steel material is driven in between the H-shaped steel from above. 10 is a notch through which a wire (not shown) connected to 10 is passed, and 15 in the figure is an eyebolt that passes simultaneously with the notch 14, and prevents the sound absorbing panel 1 B from falling off the panel-supporting H-shaped steel 10. .

図３〜図９に示すように、吸音パネル１Ｂは、第２吸音材３Ｂを内装した第２吸音空間４Ｂを内部に形成すると共に、音源とその音源の周囲とを隔てる隔壁を形成自在な第２外枠体５Ｂを設け、第２吸音空間４Ｂに外方の音を取り入れ自在な音導入孔６を多数設けてある音透過面を、第２外枠体５Ｂの音源側表面部７及び、背面部８に形成してある。そして、第２吸音材３Ｂが上端部側ほどその流れ抵抗値及び面密度が小さくなるように形成されており、第２外枠体５Ｂの内面との間に間隙を設けてある。
尚、第１外枠体５Ａ及び第２外枠体５Ｂは、夫々２部材以上の板金部材から成り、それらの複数の板金部材をリベットやボルトナット又は接着、溶接などで一体に箱状に組み付けて形成してある。 As shown in FIGS. 3 to 9, the sound absorbing panel 1 </ b> B has a second sound absorbing space 4 </ b> B in which the second sound absorbing material 3 </ b> B is housed, and a partition that separates the sound source and the periphery of the sound source. 2 A sound transmitting surface provided with a plurality of sound introduction holes 6 provided with an outer frame body 5B and capable of taking outside sound into the second sound absorbing space 4B, and a sound source side surface portion 7 of the second outer frame body 5B; It is formed on the back surface portion 8. The second sound absorbing material 3B is formed such that the flow resistance value and the surface density thereof become smaller toward the upper end side, and a gap is provided between the second sound absorbing material 3B and the inner surface of the second outer frame body 5B.
The first outer frame body 5A and the second outer frame body 5B are each composed of two or more sheet metal members, and the plurality of sheet metal members are assembled together in a box shape by rivets, bolts and nuts, adhesion, welding, or the like. Formed.

更に、最上段の吸音パネル１Ｂは、図１〜図９において示すように、道路とその道路の周囲とを隔てる隔壁を形成自在な第２外枠体５Ｂを設け、第２吸音空間４Ｂに外方の音を取り入れ自在な音導入孔６を多数設けたアルミニウム製のパンチングメタルで、第２外枠体５Ｂの正面、上面、背面の３面を形成してある。また、第２吸音空間４Ｂには、多孔質系吸音材であるポリエステル（ＰＥＴ）ウールで第２吸音材３Ｂを形成し、その第２吸音材３Ｂが、上端部側ほどその流れ抵抗値及び面密度が小さくなるように形成されており、しかも、パンチングメタルからなる第２外枠体５Ｂの内面とは密接させずに、その内面との間に１ｍｍ以上の間隙を開けて空気層を設けてある。
前記第２吸音材３Ｂには、その表面に難燃性のクロス９を貼り付けて耐候性を保持してあると共に、前記パンチングメタルの開口率は、５０％以上では防音壁設備上端縁近傍での音の回折現象の抑制効果は変わりないがパネル剛性が低下しやすくなるために、約３２％にしてある。
図９における１７は、第２吸音材３Ｂの上端と、第２外枠体５Ｂの上端部下面との間隙に充填して、第２吸音材３Ｂの安定保持を行う充填ゴムで、１８は、第２吸音材の横中間部を押えて第２吸音材３Ｂを安定保持する押え部材であり、第２吸音材３Ｂの反対面にも同趣旨の押さえ部材１８を設けてある。
尚、第２吸音材３Ｂの横両端は、アングル部材により前後方向の移動を同様に規制してある。 Further, as shown in FIGS. 1 to 9, the uppermost sound absorbing panel 1B is provided with a second outer frame body 5B capable of forming a partition that separates the road from the periphery of the road, and is provided outside the second sound absorbing space 4B. This is a punching metal made of aluminum provided with a number of sound introduction holes 6 that can freely take the sound of the other side, and the three surfaces of the second outer frame body 5B, the front surface, the upper surface, and the rear surface, are formed. Further, in the second sound absorbing space 4B, the second sound absorbing material 3B is formed of polyester (PET) wool, which is a porous sound absorbing material, and the second sound absorbing material 3B has its flow resistance value and surface closer to the upper end side. It is formed so as to have a low density, and it is not in close contact with the inner surface of the second outer frame body 5B made of punching metal, and an air layer is provided with a gap of 1 mm or more between the inner surface. is there.
The second sound-absorbing material 3B has a weather-resistant cloth 9 attached to the surface thereof to maintain the weather resistance, and the punching metal has an opening ratio of 50% or more in the vicinity of the upper edge of the soundproof wall equipment. Although the effect of suppressing the sound diffraction phenomenon is not changed, the panel rigidity is likely to be lowered.
In FIG. 9, 17 is a filling rubber that fills the gap between the upper end of the second sound absorbing material 3B and the lower surface of the upper end portion of the second outer frame body 5B to stably hold the second sound absorbing material 3B. It is a pressing member that holds the second sound absorbing material 3B stably by pressing the lateral intermediate portion of the second sound absorbing material, and a pressing member 18 having the same meaning is provided on the opposite surface of the second sound absorbing material 3B.
The lateral ends of the second sound absorbing material 3B are similarly restricted from moving in the front-rear direction by an angle member.

前記第２吸音材３Ｂは、ポリエステル繊維をベルトコンベア上に吹き付け成形してマット上に成形したもので、縦断面台形で上方側ほど厚みが薄く、最小厚み約３５ｍｍ、下端部の最大厚み約７０ｍｍとし、上下幅ｌは１００〜１０００ｍｍ前後とする。図２、図９では、上下幅４４０ｍｍ、上端部の厚み４０〜５０ｍｍ、下端部の厚み６０〜７０ｍｍに成形し、そして、成形時の目付量を１３００ｇ／ｍ2（最小厚み部分）〜３７００ｇ／ｍ2（最大厚み部分）前後として、空気の流れ抵抗値が４０００Ｎ・ｓ／ｍ3以下で、下部の厚み大の箇所で約３０００Ｎ・ｓ／ｍ3で、上部の厚み小の箇所で約３００Ｎ・ｓ／ｍ3に設定して、上下方向に夫々連続的に変化するように形成してある。
つまり、図１、図２に示すように、従来の既設の防音壁設備において、最上段の第１吸音パネル１Ａを取り外して、吸音パネル１Ｂに入れ換えるだけでも、道路側の発生音が、防音壁設備の背面側に回り込んで拡がるのを防止できる。 The second sound-absorbing material 3B is formed by spraying polyester fiber onto a belt conveyor and molding it on a mat. The trapezoidal longitudinal section has a thickness that is thinner toward the upper side, a minimum thickness of about 35 mm, and a maximum thickness of the lower end of about 70 mm. The vertical width l is about 100 to 1000 mm. 2 and 9, the upper and lower width is 440 mm, the upper end thickness is 40 to 50 mm, the lower end thickness is 60 to 70 mm, and the basis weight during molding is 1300 g / m 2 (minimum thickness portion) to 3700 g / Before and after m 2 (maximum thickness portion), the air flow resistance value is 4000 N · s / m 3 or less, the lower thick portion is about 3000 N · s / m 3 , and the upper thickness portion is about 300 N. -It is set to s / m 3 and is formed so as to continuously change in the vertical direction.
That is, as shown in FIGS. 1 and 2, in the conventional existing soundproof wall equipment, even if the first sound absorbing panel 1A at the uppermost stage is removed and replaced with the sound absorbing panel 1B, the sound generated on the road side is generated as a soundproof wall. It is possible to prevent it from spreading around the back side of the facility.

[第２実施形態]
第１実施形態の吸音パネル１Ｂの別の第２実施形態を、図１０〜図１９に示し説明をする。
吸音パネル１Ｂは、第２吸音材３Ｂを内装した第２吸音空間４Ｂを内部に形成すると共に、音源とその音源の周囲とを隔てる隔壁を形成自在な第２外枠体５Ｂを、縦断面形状が台形になるように形成し、第２吸音空間４Ｂに外方の音を取り入れ自在な音導入孔６を多数設けてある音透過面を、第２外枠体５Ｂの音源側表面部７及び、背面部８に形成してある。そして、第２外枠体５Ｂの上下幅を、第１外枠体５Ａの上下幅よりも小に形成してある。 [Second Embodiment]
Another second embodiment of the sound absorbing panel 1B of the first embodiment will be described with reference to FIGS.
The sound absorbing panel 1B has a second sound absorbing space 4B in which a second sound absorbing material 3B is housed, and a second outer frame 5B that can form a partition wall that separates the sound source and the periphery of the sound source. Is formed in a trapezoidal shape, and a sound transmitting surface provided with a large number of sound introduction holes 6 through which the outside sound can be taken in the second sound absorbing space 4B is provided as a sound source side surface portion 7 of the second outer frame 5B and The back surface 8 is formed. The vertical width of the second outer frame body 5B is smaller than the vertical width of the first outer frame body 5A.

また、最上段の吸音パネル１Ｂは、図１０〜図１９において示すように、道路とその道路の周囲とを隔てる隔壁を形成自在な第２外枠体５Ｂを設け、第２吸音空間４Ｂに外方の音を取り入れ自在な音導入孔６を多数設けたアルミニウム製のパンチングメタルで、第２外枠体５Ｂの正面、上面、背面の３面を形成してある。また、第２吸音空間４Ｂには、多孔質系吸音材であるポリエステル（ＰＥＴ）ウールで第２吸音材３Ｂを形成し、その第２吸音材３Ｂを、パンチングメタルからなる外枠体の内面とは密接させずに、その内面との間に１ｍｍ以上の間隙を開けて空気層を設けてある。
前記第２吸音材３Ｂには、その表面に難燃性のクロス９を貼り付けて耐候性を保持してあると共に、前記パンチングメタルの開口率は、５０％以上では防音壁設備上端縁近傍での音の回折現象の抑制効果は変わりないがパネル剛性が低下しやすくなるために、約３２％にしてある。 Further, as shown in FIGS. 10 to 19, the uppermost sound absorbing panel 1B is provided with a second outer frame body 5B that can form a partition wall that separates the road from the periphery of the road, and is provided outside the second sound absorbing space 4B. This is a punching metal made of aluminum provided with a number of sound introduction holes 6 that can freely take the sound of the other side, and the three surfaces of the second outer frame body 5B, the front surface, the upper surface, and the rear surface, are formed. Further, in the second sound absorbing space 4B, the second sound absorbing material 3B is formed of polyester (PET) wool, which is a porous sound absorbing material, and the second sound absorbing material 3B is connected to the inner surface of the outer frame body made of punching metal. The air layer is provided with a gap of 1 mm or more between the inner surface without being in close contact with each other.
The second sound-absorbing material 3B has a weather-resistant cloth 9 attached to the surface thereof to maintain the weather resistance, and the punching metal has an opening ratio of 50% or more in the vicinity of the upper edge of the soundproof wall equipment. Although the effect of suppressing the sound diffraction phenomenon is not changed, the panel rigidity is likely to be lowered.

前記第２吸音材３Ｂは、ポリエステル繊維をベルトコンベア上に吹き付け成形してマット上に成形したもので、上下方向に均一な約３５〜８０ｍｍの厚みで（図１８では、３５ｍｍ厚）、上下幅は１９５ｍｍとする。そして、成形時の目付量を３０００ｇ／ｍ2前後として、面密度７０００ｇ／ｍ2以下で、空気の流れ抵抗値が４０００Ｎ・ｓ／ｍ3以下に設定してある。
尚、吸音パネル１Ｂは、図１０、図１１、図１９に示すように、上下複数段に積み上げた防音パネル１Ａの内の最上段のものの更に上に配設すべく、横方向に隣接するパネル支持用Ｈ型鋼１０間に亘ってそれらの上端に連結した天板１１の上に、第２吸音パネル１Ｂを載置して連結部材１２で連結固定してある。
図中の１３は、防音パネル１Ａの上端部と天板１１との間に介在して、第１吸音パネル１Ａを固定するスペーサーである。
また、道路に沿って並べた吸音パネル１Ｂどうしの間の隙間は、間隙カバー部材１９を、隣接する吸音パネル１Ｂの端部同士に亘って被せることで、塞いである。 The second sound absorbing material 3B is formed by spraying polyester fiber on a belt conveyor and molding it on a mat. The second sound absorbing material 3B has a uniform thickness of about 35 to 80 mm in the vertical direction (35 mm thickness in FIG. 18) and the vertical width. Is 195 mm. The basis weight during molding is about 3000 g / m 2 , the surface density is 7000 g / m 2 or less, and the air flow resistance value is set to 4000 N · s / m 3 or less.
In addition, as shown in FIGS. 10, 11, and 19, the sound absorbing panel 1B is a panel adjacent in the lateral direction so as to be disposed above the uppermost one of the soundproof panels 1A stacked in a plurality of upper and lower stages. The second sound absorbing panel 1B is placed on the top plate 11 connected to the upper ends of the supporting H-shaped steels 10 and connected and fixed by the connecting member 12.
13 in the figure is a spacer that is interposed between the upper end portion of the soundproof panel 1A and the top plate 11 and fixes the first sound absorbing panel 1A.
Further, the gap between the sound absorbing panels 1B arranged along the road is closed by covering the gap cover member 19 across the ends of the adjacent sound absorbing panels 1B.

[第３実施形態]
吸音パネル１Ｂの第３実施形態を、図２０〜図２４に示し、説明する。
吸音パネル１Ｂは、第２吸音材３Ｂを内装した第２吸音空間４Ｂを内部に形成すると共に、音源とその音源の周囲とを隔てる隔壁を形成自在な第２外枠体５Ｂを設け、第２吸音空間４Ｂとその外方とにわたる音の出入りを可能にする音挿通孔を多数設けてある音透過面を、第２外枠体５Ｂの音源側表面部７及び、背面部８に形成し、音透過面を、第２外枠体５Ｂの天井部２０にも設け、第２外枠体５Ｂの内面に対して第２吸音材３Ｂにおける表裏の上下縦面、及び、上面との間に間隙を設け、第２吸音材３Ｂの上方を通気性のある撥水部材２１で覆ってある。つまり、第２外枠体５Ｂを穴開きのパンチングメタルで構成して、音源側表面部７、背面部８、天井部２０に音透過面を形成してある。 [Third embodiment]
A third embodiment of the sound absorbing panel 1B will be described with reference to FIGS.
The sound absorbing panel 1B has a second sound absorbing space 4B in which the second sound absorbing material 3B is housed, and a second outer frame 5B that can form a partition that separates the sound source and the periphery of the sound source. A sound transmitting surface provided with a large number of sound insertion holes that allow sound to enter and exit the sound absorbing space 4B and the outside thereof is formed on the sound source side surface portion 7 and the back surface portion 8 of the second outer frame body 5B. A sound transmission surface is also provided on the ceiling portion 20 of the second outer frame body 5B, and a gap is formed between the upper and lower vertical surfaces on the front and back surfaces of the second sound absorbing material 3B and the upper surface with respect to the inner surface of the second outer frame body 5B. The second sound absorbing material 3B is covered with a breathable water repellent member 21. That is, the second outer frame body 5B is made of perforated metal with holes, and sound transmitting surfaces are formed on the sound source side surface portion 7, the back surface portion 8, and the ceiling portion 20.

前記撥水部材２１は、撥水性の布で形成され、吸音パネル１Ｂ裏面側に雨水が流下する水勾配を形成するように、第２外枠体５Ｂの下側で、間隔を隔てて取り付けると共に、パネル全幅に亘る長さの布支持用第１パンチングメタル２２で支持されている。
また、撥水部材２１における水勾配の下流側に、第２吸音材３Ｂの上下縦面よりも外方側に延設する軒部を形成する第２パンチングメタル２３を取り付け、その第２パンチングメタル２３上に延設した撥水部材２１を載置支持させて、撥水部材２１上を流下する雨水が、水勾配に沿って軒部を流下して下方に落下することで、第２吸音材３Ｂが雨水に濡れて含水して吸音性能を低下させてしまうのを防止してある。
尚、第２吸音材３Ｂの表面及び裏面にも、撥水部材２１としての防水布を貼ってある。 The water repellent member 21 is formed of a water repellent cloth, and is attached to the lower side of the second outer frame body 5B with an interval so as to form a water gradient on which the rainwater flows down on the back side of the sound absorbing panel 1B. The first punching metal 22 for supporting the cloth has a length over the entire width of the panel.
Moreover, the 2nd punching metal 23 which attaches the eaves part extended in the outward side rather than the up-and-down vertical surface of the 2nd sound-absorbing material 3B is attached to the downstream of the water gradient in the water repellent member 21, The 2nd punching metal The water-repellent member 21 extended on 23 is placed and supported, and rainwater flowing down on the water-repellent member 21 flows down along the water gradient and falls downward, so that the second sound absorbing material It prevents the 3B from getting wet with rain water and deteriorating the sound absorption performance.
In addition, the waterproof cloth as the water repellent member 21 is also stuck on the front surface and the back surface of the second sound absorbing material 3B.

前記第２吸音材３Ｂの底部の下側には、図２２、図２４に示すように、第２外枠体５Ｂの内部に侵入した雨水を第２外枠体５Ｂの長手方向に沿って排水する排水溝２４を形成するように支持する吸音材支持部２５を、第２外枠体５Ｂに設けてある。つまり、第２外枠体５Ｂの天井部２０に形成された音透過面としての多数の音挿通孔から雨水が第２吸音空間４Ｂに侵入して、下方に流下しても、第２外枠体５Ｂに設けた排水溝２４によって第２外枠体５Ｂの長手方向に排出させることができ、吸音材支持部２５で支持された第２吸音材３Ｂが吸水してその吸音性能を低下させる心配を防止できる。また、排水溝２４により第２外枠体５Ｂの長手方向（左右両横方向）に案内して排水することで、下側の防音パネル１Ａに対しても雨水の浸入を防止できる。   Under the bottom of the second sound absorbing material 3B, as shown in FIGS. 22 and 24, rainwater that has entered the inside of the second outer frame 5B is drained along the longitudinal direction of the second outer frame 5B. A sound absorbing material support portion 25 that supports the drainage groove 24 to be formed is provided in the second outer frame body 5B. That is, even if rainwater enters the second sound absorbing space 4B and flows downward from a large number of sound insertion holes as sound transmitting surfaces formed in the ceiling portion 20 of the second outer frame body 5B, the second outer frame The drainage groove 24 provided in the body 5B can be discharged in the longitudinal direction of the second outer frame body 5B, and the second sound absorbing material 3B supported by the sound absorbing material support portion 25 absorbs water, and the sound absorbing performance is deteriorated. Can be prevented. Further, the drainage groove 24 guides and drains the second outer frame body 5B in the longitudinal direction (both left and right lateral directions), thereby preventing rainwater from entering the lower soundproof panel 1A.

[実施例１]
次に第３実施形態による吸音効果を、前記第１実施形態（比較例１）と比較実験した。
図３０（ａ）、（ｂ）、（ｃ）に示すように、第２外枠体５Ｂの天井部２０を塞いだ第１実施形態（比較例１）の第１吸音パネル１ＢＡと、天井部２０全面に音透過面を形成するパンチングメタルを設けた第２吸音パネル１ＢＢと、第２外枠体５Ｂの上面及び側面のなす角部を、夫々２５ｍｍ残し、その他をパンチングメタルにした第３吸音パネル１ＢＣ（第３実施形態）との音の回折現象抑制効果を、夫々調べた結果を、図３１のグラフに示す。
これによると、第２吸音パネル１ＢＢが明らかに吸音効果が高いことが分かる。 [Example 1]
Next, the sound absorption effect of the third embodiment was compared with that of the first embodiment (Comparative Example 1).
As shown in FIGS. 30A, 30B, and 30C, the first sound absorbing panel 1BA of the first embodiment (Comparative Example 1) in which the ceiling portion 20 of the second outer frame body 5B is closed, and the ceiling portion. 20 A third sound absorbing panel in which the corners formed by the second sound absorbing panel 1BB provided with a punching metal that forms a sound transmitting surface on the entire surface and the upper surface and side surfaces of the second outer frame body 5B are left 25 mm, and the rest are punched metal. The graph of FIG. 31 shows the results of examining the effect of suppressing the sound diffraction phenomenon with the panel 1BC (third embodiment).
According to this, it can be seen that the second sound absorbing panel 1BB clearly has a high sound absorbing effect.

[実施例２]
次に、音透過面を形成した第２外枠体５Ｂの上面と、第２吸音材３Ｂの上面との間の隙間と、空気粒子流れ抵抗との関係を調べて図３２のグラフに示した。
ＰＥＴ（ポリエステル）ウールの第２吸音材３Ｂ単体 (図３２（ａ）)と、ＰＥＴウールの第２吸音材３Ｂとパンチングメタルとの間の空気層厚０ｍｍ（図３２（ｂ））と、ＰＥＴウールの第２吸音材３Ｂとパンチングメタルとの間の空気層厚１０ｍｍ（図３２（ｃ））と、ＰＥＴウールの第２吸音材３Ｂとパンチングメタルとの間の空気層厚２０ｍｍ（図３２（ｄ））との夫々の空気粒子流れ抵抗（Ｎ・ｓ／ｍ3）を示す図３２のグラフによると、空気層厚は、１０ｍｍ以上が好ましいことが明確である。 [Example 2]
Next, the relationship between the clearance between the upper surface of the second outer frame 5B on which the sound transmission surface is formed and the upper surface of the second sound absorbing material 3B and the air particle flow resistance is examined and shown in the graph of FIG. .
PET (polyester) wool second sound absorbing material 3B alone (FIG. 32 (a)), air layer thickness between PET wool second sound absorbing material 3B and punching metal (FIG. 32 (b)), PET The air layer thickness 10 mm (FIG. 32C) between the second sound absorbing material 3B of wool and the punching metal and the air layer thickness 20 mm between the second sound absorbing material 3B of PET wool and the punching metal (FIG. 32 ( According to the graph of FIG. 32 showing the respective air particle flow resistance (N · s / m 3 ) with d)), it is clear that the air layer thickness is preferably 10 mm or more.

[第４実施形態]
吸音パネル１Ｂは、第３実施形態とは別の実施形態として、図２５〜図２９に示すように、パンチングメタルからなる第２外枠体５Ｂの天井部２０を、撥水部材２１と同様に傾斜姿勢に取付けて、下方の第１パンチングメタル２２とで撥水布からなる撥水部材２１を挟み込み固定してある。
尚、第２外枠体５Ｂと第１パンチングメタル２２は、吸音パネル１Ｂの略横幅全長に亘る長さに形成してあるが、第１パンチングメタル２２の帯状支持部材２６と、その帯状支持部材２６と上端部で連結する第２吸音材３Ｂの押え部材１８とは、夫々幅狭の帯状に形成して吸音パネル１Ｂ横方向の複数個所に取り付けてある。 [Fourth embodiment]
As shown in FIGS. 25 to 29, the sound absorbing panel 1 </ b> B is different from the third embodiment in that the ceiling portion 20 of the second outer frame body 5 </ b> B made of punching metal is the same as the water repellent member 21. A water-repellent member 21 made of a water-repellent cloth is sandwiched and fixed between the lower first punching metal 22 and attached in an inclined posture.
The second outer frame body 5B and the first punching metal 22 are formed to have a length over the substantially entire width of the sound absorbing panel 1B. However, the belt-like support member 26 of the first punching metal 22 and the belt-like support member thereof. 26 and the pressing member 18 of the second sound absorbing material 3B connected at the upper end are formed in a narrow band shape and attached to a plurality of locations in the lateral direction of the sound absorbing panel 1B.

〔別実施形態〕
以下に他の実施の形態を説明する。
〈１〉 前記第１吸音材３Ａ、第２吸音材３Ｂは、ポリエステルウール以外に、グラスウールやロックウール等の無機繊維からなる多孔質体や、ステンレス繊維などの金属繊維からなる多孔質体の他に、アルミニウム焼結板から構成してあってもよい。
〈２〉 前記パンチングメタルを、アルミニウム以外に、ステンレス、亜鉛引き鋼板などの金属板から形成してあってもよい。また、ポリカーボネート、アクリル等の樹脂板であっても良い。
〈３〉 前記防音壁設備は、道路用以外に、鉄道用、一般の防音壁設備、又は、室内のパーティションにも利用することもできる。
〈４〉 前記第１実施形態の第２吸音材３Ｂは、上下方向に連続的に厚み及び流れ抵抗値が変化するもの以外に、厚みが均等で下端部ほど面密度が大きくなるものや、密度一定で厚みを上端側程薄く形成してあったり、密度一定の吸音材マットを、厚み方向に積層して上端側より下端部ほど積層枚数を増加させてあってもよく、つまり、空気の流れ抵抗値を下端部ほど大になるように設定してあればよい。
〈５〉 第２外枠体５Ｂの表面部を、パンチングメタル以外に、金属メッシュやガラリ構造やルーバー形式の金属板や金属製焼結板で形成してあってもよい。
〈６〉 第２吸音材３Ｂの上方を覆う前記撥水部材２１は、撥水性の織布や不織布等でもよく、また、それを支持するのに、少なくとも表裏の上下縦面いずれか一方側に雨水が流下する水勾配を形成するようにしてあればよい。 [Another embodiment]
Other embodiments will be described below.
<1> The first sound absorbing material 3A and the second sound absorbing material 3B are other than polyester wool, a porous body made of inorganic fibers such as glass wool and rock wool, and a porous body made of metal fibers such as stainless steel fibers. Moreover, you may comprise from the aluminum sintered plate.
<2> The punching metal may be formed of a metal plate such as stainless steel or galvanized steel plate in addition to aluminum. Further, a resin plate such as polycarbonate or acrylic may be used.
<3> The soundproof wall equipment can be used not only for roads but also for railways, general soundproof wall equipment, or indoor partitions.
<4> The second sound-absorbing material 3B of the first embodiment has a uniform thickness and a surface density that is increased toward the lower end, in addition to a material whose thickness and flow resistance value continuously change in the vertical direction. The thickness may be constant as the upper end is thinned, or the sound absorbing material mat having a constant density may be laminated in the thickness direction, and the number of laminated layers may be increased from the upper end to the lower end. What is necessary is just to set resistance value so that it may become large in a lower end part.
<5> The surface portion of the second outer frame 5B may be formed of a metal mesh, a galley structure, a louver-type metal plate, or a metal sintered plate in addition to the punching metal.
<6> The water-repellent member 21 covering the second sound-absorbing material 3B may be a water-repellent woven or non-woven fabric, and at least one of the upper and lower vertical surfaces on the front and back sides to support it. What is necessary is just to make it form the water gradient from which rainwater flows down.

尚、上述のように、図面との対照を便利にするために符号を記したが、該記入により本
発明は添付図面の構成に限定されるものではない。また、本発明の要旨を逸脱しない範囲において、種々なる態様で実施し得ることは勿論である。 In addition, as mentioned above, although the code | symbol was written in order to make contrast with drawing convenient, this invention is not limited to the structure of an accompanying drawing by this entry. In addition, it goes without saying that the present invention can be carried out in various modes without departing from the gist of the present invention.

１Ａ 防音パネル
１Ｂ 吸音パネル
３Ａ 第１吸音材
３Ｂ 第２吸音材
４Ａ 第１吸音空間
４Ｂ 第２吸音空間
５Ａ 第１外枠体
５Ｂ 第２外枠体
６ 音導入孔
７ 音源側表面部
８ 背面部
２０ 天井部
２１ 撥水部材
２４ 排水溝
２５ 吸音材支持部 DESCRIPTION OF SYMBOLS 1A Soundproof panel 1B Sound absorption panel 3A 1st sound absorption material 3B 2nd sound absorption material 4A 1st sound absorption space 4B 2nd sound absorption space 5A 1st outer frame body 5B 2nd outer frame body 6 Sound introduction hole 7 Sound source side surface part 8 Back surface part 20 Ceiling part 21 Water repellent member 24 Drainage groove 25 Sound absorbing material support part

Claims (10)

第１吸音材を第１吸音空間に内装してある防音パネルを、上下方向に複数段に並べてある防音壁設備において、
上下方向に複数段に並べてある前記防音パネルの内の最上段の物の更に上に配設し、
第２吸音材を内装した第２吸音空間を内部に形成すると共に、音源とその音源の周囲とを隔てる隔壁を形成自在な第２外枠体を設け、
前記第２吸音空間とその外方とにわたる音の出入りを可能にする音挿通孔を多数設けてある音透過面を、前記第２外枠体の音源側表面部及び、背面部に形成してある吸音パネルであって、
前記音透過面を、第２外枠体の天井部にも設け、
前記第２外枠体の内面に対して前記第２吸音材における表裏の上下縦面、及び、上面との間に間隙を設け、
前記第２吸音材の上方を通気性のある撥水部材で覆ってある吸音パネル。 In the soundproof wall equipment in which the soundproof panels in which the first sound absorbing material is installed in the first sound absorbing space are arranged in a plurality of stages in the vertical direction,
Arranged above the topmost one of the soundproof panels arranged in a plurality of stages in the vertical direction,
A second sound absorbing space is provided inside the second sound absorbing material, and a second outer frame body is provided that can form a partition that separates the sound source and the periphery of the sound source.
A sound transmitting surface provided with a large number of sound insertion holes that allow sound to enter and exit from the second sound absorbing space and the outside thereof is formed on the sound source side surface portion and the back surface portion of the second outer frame body. A sound absorbing panel,
The sound transmission surface is also provided on the ceiling of the second outer frame,
A gap is provided between the upper and lower vertical surfaces of the second sound absorbing material and the upper surface with respect to the inner surface of the second outer frame body,
A sound-absorbing panel in which the second sound-absorbing material is covered with a breathable water-repellent member. 前記撥水部材は、前記第２吸音材の少なくとも表裏の前記上下縦面いずれか一方側に雨水が流下する水勾配を形成するように支持されている撥水性の布である請求項１に記載の吸音パネル。   The water-repellent member is a water-repellent cloth supported so as to form a water gradient in which rainwater flows down on at least one of the upper and lower vertical surfaces on the front and back of the second sound absorbing material. Sound absorbing panel. 前記撥水部材における水勾配の下流側に、前記第２吸音材の前記上下縦面よりも外方側に延設する軒部を形成してある請求項２に記載の吸音パネル。   The sound absorbing panel according to claim 2, wherein an eave portion extending outward from the vertical vertical surface of the second sound absorbing material is formed on the downstream side of the water gradient in the water repellent member. 前記撥水部材を、前記第２外枠体の天井部よりも下側に配設してある請求項１〜３のいずれか１項に記載の吸音パネル。   The sound-absorbing panel according to any one of claims 1 to 3, wherein the water-repellent member is disposed below a ceiling portion of the second outer frame body. 前記第２吸音材の底部の下側に、前記第２外枠体の内部に侵入した雨水を前記第２外枠体の長手方向に沿って排水する排水溝を形成するように支持する吸音材支持部を、前記第２外枠体に設けてある請求項１〜４のいずれか１項に記載の吸音パネル。   A sound absorbing material that supports a rain groove that drains rainwater that has entered the inside of the second outer frame body along a longitudinal direction of the second outer frame body under the bottom of the second sound absorbing material. The sound-absorbing panel according to claim 1, wherein a support portion is provided on the second outer frame body. 前記第２吸音材が、ポリエステル繊維ウールから成る多孔質材から成形されている請求項１〜５のいずれか１項に記載の吸音パネル。   The sound absorbing panel according to any one of claims 1 to 5, wherein the second sound absorbing material is formed from a porous material made of polyester fiber wool. 前記第２吸音材の面密度を０．９〜１００ｋｇ／ｍ2で、その流れ抵抗値を４００〜４０００Ｎ・ｓ／ｍ3に設定してある請求項１〜６のいずれか１項に記載の吸音パネル。 The surface density of the second sound absorbing material in 0.9~100kg / m 2, according to any one of claims 1 to 6, is set the flow resistance value in 400~4000N · s / m 3 Sound absorbing panel. 第１吸音材を第１吸音空間に内装してある防音パネルを、上下方向に複数段に並べ、
上下方向に複数段に並べてある前記防音パネルの内の最上段の物の更に上に、第２吸音材を内装した第２吸音空間を内部に形成すると共に、音源とその音源の周囲とを隔てる隔壁を形成自在な第２外枠体を設け、
前記第２吸音空間とその外方とにわたる音の出入りを可能にする音挿通孔を多数設けてある音透過面を、前記第２外枠体の音源側表面部及び、背面部に形成すると共に、
前記音透過面を、第２外枠体の天井部にも設け、
前記第２外枠体の内面に対して前記第２吸音材における表裏の上下縦面、及び、上面との間に間隙を設け、
前記第２吸音材の上方を通気性のある撥水部材で覆ってある吸音パネルを配設してある防音壁設備。 The soundproof panels in which the first sound absorbing material is installed in the first sound absorbing space are arranged in a plurality of stages in the vertical direction,
A second sound-absorbing space with a second sound-absorbing material is formed inside the soundproof panel arranged in a plurality of stages in the vertical direction, and a sound source is separated from the surroundings of the sound source. Providing a second outer frame that can form a partition;
A sound transmitting surface provided with a large number of sound insertion holes for allowing sound to enter and exit from the second sound absorbing space and the outside thereof is formed on the sound source side surface portion and the back surface portion of the second outer frame body. ,
The sound transmission surface is also provided on the ceiling of the second outer frame,
A gap is provided between the upper and lower vertical surfaces of the second sound absorbing material and the upper surface with respect to the inner surface of the second outer frame body,
A soundproof wall facility in which a sound absorbing panel is provided, the upper part of the second sound absorbing material being covered with a breathable water repellent member. 前記第２吸音材が上端部側ほどその流れ抵抗値及び面密度が小さくなるように形成されている請求項８に記載の防音壁設備。   The soundproof wall equipment according to claim 8, wherein the second sound absorbing material is formed such that the flow resistance value and the surface density thereof become smaller toward the upper end side. 前記第２外枠体の上下幅を、前記第１外枠体の上下幅より小に形成してある請求項８または９に記載の防音壁設備。   The soundproof wall equipment according to claim 8 or 9, wherein a vertical width of the second outer frame body is formed smaller than a vertical width of the first outer frame body.
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