JP3992653B2

JP3992653B2 - Sound absorption and translucent soundproof wall

Info

Publication number: JP3992653B2
Application number: JP2003178202A
Authority: JP
Inventors: 泰伸鈴木; 新次日高; 義博太田; 陽一池田
Original assignee: Kurimoto Ltd
Current assignee: Kurimoto Ltd
Priority date: 2003-06-23
Filing date: 2003-06-23
Publication date: 2007-10-17
Anticipated expiration: 2023-06-23
Also published as: JP2005016015A

Description

【０００１】
【発明の属する技術分野】
本発明は、透光遮音板と透光性吸音材を間隔を持って取り付けた吸音・透光性防音壁に関する。特に、既設の防音壁に透光性吸音材を追加、固定する吸音・透光性防音壁に関するものである。
【０００２】
【従来の技術】
従来、透光性のある道路用防音壁として、透明樹脂板からなる透光遮音板を立設した防音壁があるが、この防音壁は、透光機能と遮音機能を有しているものの、吸音機能に乏しいため、道路を走行する車輌などから発生する騒音が、防音壁に反射するため十分な騒音低減効果が得られないという問題があり、この対策として、道路側に透光性吸音材を取り付けた構造の防音板が提案されている。（特許文献１を参照のこと）
【０００３】
【特許文献１】
特開２００２−３１７４０８号公報：例えば、図４、図８、図９、段落〔００２２〕。
【０００４】
特許文献１の方法は、透明樹脂板を枠材でパネル化した透光板をＨ形支柱に嵌合させて建て込んだ防音壁に、透光性吸音材を取り付けるものであるが、透光板の押え材を一度取り外してから、押さえ材兼支え材と四周を額縁部材で縁取りしてカートリッジ化した透光性吸音材パネルを、透光板のパネル枠材に取り付ける方法により行われるものであるため、現場での取り付け手間がかかる問題があった。さらに、図１に示すような透明樹脂板２を壁面としてＨ形支柱間に立設した既設の防音壁１を対象として、吸音機能を追加するには適合するものではなかった。
【０００５】
【発明が解決しようとする課題】
本発明は、上記の問題点を解決するためになされたものであり、透光遮音板をＨ形支柱間に立設してなる既設の防音壁に対して、透光性吸音材を容易に組み付け加工して完成できる吸音性を付加した吸音・透光性防音壁を提供する。
【０００６】
【課題を解決するための手段】
上記の問題は、左右のＨ形支柱にその両側端部を固定した透光遮音板を立設してなる既設の防音壁の対象音源側に、透光性の膜状材料と多孔材料を積層した透光性吸音材を四周枠材に取り付けた透光性吸音材パネルを、前記透光遮音板との間に空間を隔てて取り付けて吸音性を付加した吸音・透光性防音壁であって、その透光性吸音材パネルを、既設の前記Ｈ形支柱にその四周枠材の側端部を取り付けることにより、前記左右のＨ形支柱の間に装着したことを特徴とする本発明の吸音・透光性防音壁によって、解決することができる。
また、本発明は以下の形態に具体化される。
ａ）前記Ｈ形支柱のウエブ部または道路側フランジに予め固定された中間金具に、前記透光性吸音材パネルの四周枠材の側端部を取り付けるようにした前記の吸音・透光性防音壁。
ｂ）左右のＨ形支柱の民地側フランジとウエブに固定されたＬ形固定金具との間にその両側端部を固定した透光遮音板を立設してなる既設の防音壁を対象として、前記Ｌ形固定金具と道路側フランジとの間に、前記透光性吸音材パネルの四周枠材の側端部を挿入して取り付けるようにした前記の吸音・透光性防音壁。
ｃ）左右のＨ形支柱の民地側フランジとウエブに固定されたＬ形固定金具との間にその両側端部を固定した透光遮音板を立設してなる既設の防音壁を対象として、前記Ｌ形固定金具と、ウエブに別途固定されたＬ形取付け金具との間に、前記透光性吸音材パネルの四周枠材の側端部を挿入して取り付けるようにした前記の吸音・透光性防音壁。
【０００７】
また、本発明は、前記透光性吸音材パネルの四周枠材には、Ｈ形支柱への取付け金具部、透光吸音材の取り付け部、防塵・防水カバー、通気開口部が設けられている形態に好ましく具体化され、前記四周枠材には、その中間部分に中間枠材が横架されている形態や、透光性吸音材パネルの四周枠材を、断面略コ字形の金属部材で形成し、そのコ字形凹部に多孔質吸音材を装着した形態にも具体化できる。
【０００８】
【発明の実施の形態】
次に、本発明の吸音・透光性防音壁に関する第１実施形態について図１〜１１を、第２実施形態について図１２〜１８を参照しながら説明する。
本発明の吸音・透光性防音壁は、図２の概念図に示すように、ａ）透光遮音板２を左右のＨ形支柱３、３の間に立設してなる既設の防音壁１と、ｂ）この既設の防音壁１の対象音源側に、透光遮音板２との間に空間を隔てて取り付けられる、透光性の膜状材料と多孔材料を積層した透光性吸音材６を四周枠材５に取り付けた透光性吸音材パネル４から構成される。
【０００９】
既設の防音壁１としては、図１に示すように、透明樹脂製の透光遮音板２が、所定の間隔で建て込まれたＨ形支柱３、３の道路と反対側（民地側）の支柱フランジ寄りに取り付けられている（その断面構造については後述する）。なお、透光遮音板２は、アクリル樹脂やポリカーボネート樹脂の透明板が使用されており、一般に厚さ５〜１５ｍｍ、高さ２０００〜５０００ｍｍ、横幅２０００ｍｍ程度の大型板が用いられる。
【００１０】
（第１実施形態）
次ぎに、図３〜９によって、本発明に用いられる透光性吸音材パネル４について説明する。
透光性吸音材パネル４は、正面図である図３に示す通り、透光性の膜状材料、例えば、ポリフッ化ビニルやポリフッ化エチレンなどのフッ素樹脂系フィルム、ポリエステル、ポリプロピレン、ポリ塩化ビニルなどの合成樹脂フィルムで、厚さが０．００６〜２ｍｍ程度の透明膜材料と、多孔材料、例えば、金属ワイヤメッシュ、エキスパンドメタル、パンチングメタルシートなどの金属製や樹脂製の網目板状材料、孔明き板状材料を積層して一体化した透光性吸音材６と、その外周部分を固定する四周枠材５という構成部材から基本的に構成される。
【００１１】
この透光性吸音材６は、図４（横断面図）図５（縦断面図）に例示するように、四周枠材５、中間枠材７からなる枠材に、適宜間隔のビス止め、リベット止めなどによって取り付けられて、透光性吸音材パネル４を形成している。この場合、中間枠材７は、四周枠材５の高さが５０ｃｍ以上となる大型の場合に補強のため、四周枠材５の適宜な中間に横架されるＣ形あるいは角筒形部材であるが、必ずしも必須の部材ではない。
【００１２】
この四周枠材５は、金属製または透明樹脂製のＣ形チャンネル材を四角形に枠組みしたものであり、その四周枠前面５ｂに透光性吸音材６の取り付け部５１、その取り付け部５１を覆うよう突設された防塵・防水カバー５２が設けられ、その防塵・防水カバー５２で覆われた隙間を通じて取り付け部５１相互間の開口に通じた通気開口部５３が設けられるとともに、四周枠両側面５ａには、例えば、Ｈ形支柱３への取付け金具部５４、例えばアングル材が側方に突設されている。
【００１３】
図６は、透光性吸音材パネル４の側端部分の横断面、図７は、透光吸音材パネル４の上部縦断面、図８は、透光性吸音材パネル４の中間枠材７近傍の縦断面、および図９は、透光性吸音材パネル４の下部縦断面のそれぞれの詳細を示す。
【００１４】
この四周枠材５は、強度面から鉄、アルミニウムなど金属製が好ましいが、透明合成樹脂製でも利用可能である。そして、これら四周枠材５（中間枠材７を含む）の略コ字状凹部５ｃ（７ｃ）に、図６以降に例示するように多孔質吸音材５５（７５）を装着すると、更に吸音性能（吸音率）を高めることができるので好ましい。なお、この吸音材５５（７５）は縦横全部に装着してもよいし、部分的に装着してもよい。
【００１５】
これら図には、四周枠前面５ｂに設けた透光性吸音材６の取り付け部５１の詳細が例示されている。この取り付け部５１では、パッキン６１が嵌着された透光性吸音材６の端部が、押え金具６２で挟み込まれ、隙間調整材６３を介して四周枠前面５ｂに、ブラインドリベットやビス６４で固定されている。このような取り付け部５１は、四周枠材５の四周にわたって、１００ｍｍ〜３００ｍｍ間隔に設けられている。
なお、通気性を得るために、隙間調整材６３は大きさが１０ｍｍ〜２０ｍｍ程度の座金等を用いるが、通し材と併用してもよい。
【００１６】
また、中間枠材７は断面がコ字または角筒状部材で、四周枠材と同様な材質が用いられ得るが、外部からの衝撃を受止める目的から金属製が好ましく、四周枠材５との間隔が５００ｍｍ以下になるよう単数本または複数本を配設するのが好ましい。なお、中間枠材７と透光性吸音材６とは、押え金具７２、隙間調整材７３を介してブラインドリベットやビス７４で固定されるのは、四周枠材５の場合とほぼ同様である。
【００１７】
そして、透光性吸音材パネル４を取り付ける際に、中間枠材７の後端部を透光遮音板２に密接させると、透光遮音板２の板振動抑制により低周波域の遮音性を数ｄＢ向上させることができる。この場合、透光遮音板２との接触する中間枠材７の後端部７ａには緩衝材７１を取り付けておくのがよい（図５参照）。
【００１８】
また、防塵・防水カバー５２で覆われた隙間を通じて取り付け部５１相互間の開口に通じた通気開口部５３が設けられているので、透光性吸音材６と透光遮音板２で囲まれた防音壁内部の通風が計られるので、内部が結露するなどの問題を回避できる。また、この通気開口部５３と透光吸音材６の取り付け部５１などは、防塵・防水カバー５２で覆われているので、埃や雨水の浸入が防止され、保護される。
【００１９】
次ぎに第１実施形態の防音壁の構造について、以上説明した透光性吸音材パネル４の既設の防音壁１への取り付け方に基づいて、図１０を参照して以下に説明する。
（ａ）既設防音壁１のＨ形支柱３の道路側フランジ部３１に孔明け加工を行い、基端部８１と延長部８２がＬ形に屈曲した金具であるＬ形取付け金具８を、その基端部８１をウエブ部３２に当接させ、延長部８２の先端部分を突出させてボルトで留め付ける。
【００２０】
このＬ形金具８は、Ｈ形支柱３と透光性吸音材パネル４とを結合するための中間金具であって、その延長部８２には前記フランジ部３１裏面と結合するボルト孔８２ａと、突出する先端部分には透光性吸音材パネル４の取付け金具部５４と結合するボルト孔８２ｂが準備されている。これらボルト孔８２ａ、８２ｂは、位置調整可能な長孔とするのがよい。このＬ形金具８は、後述するように図１１の示す場合と共用できる形状にすることが好ましい。
【００２１】
（ｂ）透光性吸音材パネル４を吊り上げて、取り付け予定位置まで運び、Ｈ形支柱に取り付けた先のＬ形取付け金具８と、パネル側の取付け金具部５４とをボルトで固定して、透光遮音板２との間に所定の吸音空気層を設けて配置する。以下、同様な要領で下段のパネルから逐次上段へと積み上げる。パネルの上下間は隙間が生じないよう配置する。なお、この場合、パネル側の取付け金具部５４に準備するボルト孔５４ａも、前記Ｌ形金具８のボルト孔８２ｂと直交する位置調整可能な長孔に形成しておくのがよい。
【００２２】
なお、透光遮音板２と透光性吸音材６との空間（空気層）は、厚さ５０〜１００ｍｍ程度が好ましいが、要求性能に応じて適宜に調整すればよい。空気層を大きくすると低周波域の吸音率が高くなり、空気層を小さくすると低周波の吸音率は低くなる。なお、空気層厚さの調整は、四周枠材の厚さを変えることや、取り付け金具の大きさや位置を調整することなどにより行うことができる。また、透光性吸音材パネルには支柱に固定した落下防止ワイヤーロープを取り付けるのもよい。
【００２３】
図１１に例示したものは、透光性吸音材パネル４を既設の防音壁１のＨ形支柱のウエブ部へ取り付ける事例である。
既設のＨ形支柱のウエブ部３２が長すぎて、前記フランジ部３１への取り付けでは好ましくない場合には、フランジ部３１の替わりにウエブ部３２に孔明け加工を行い、Ｌ形取付け金具８の基端部８１をボルトで留め付ける。このＬ形取付け金具８は、先の事例のＬ形取付け金具８と同一形態のものであってもよい。この場合、位置調整可能な長孔のボルト孔８２ｂを用いて透光性吸音材パネル４を固定できるのは、先の事例と同様である。
【００２４】
なお、図１１に例示の透光性吸音材パネル４では、それまでのものと異なり、透光性吸音材６が四周枠材５の内周面内において張設されている（第２実施形態の項で説明する）が、本発明ではこのような形態も包含するのである。
以下、先の場合と同様に、透光性吸音材パネル４を吊り上げて、取り付け予定位置まで運び、準備したＬ形取付け金具８にボルトで固定して設置するなど一連の工事によって、防音壁を構成できるのである。
【００２５】
（第２実施形態）
次いで、本願発明の第２実施形態の吸音・透光性防音壁について、図１２〜１８を参照して説明する。
この実施形態も、先に図１に例示し、説明した既設の防音壁１を対象とし、同じく図２の概念図に示すように、ａ）透光遮音板２を左右のＨ形支柱３、３の間に立設してなる既設の防音壁１と、ｂ）その既設の防音壁１の対象音源側に、透光遮音板２との間に空間を隔てて取り付けられる、透光性の膜状材料と多孔材料を積層した透光性吸音材６を四周枠材５に取り付けた透光性吸音材パネル４から構成される点は、第１実施形態と同様である。
【００２６】
次ぎに、この第２実施形態における透光性吸音材パネル４について説明する。透光性吸音材パネル４は、正面図である図１２に示すが、基本的構造は先に説明した図３の場合と同様である。そして図３のものとの具体的な相違点は、この図１２の実施形態では、図３では両側に設けられている取付け金具部（図４の５４として示される）を欠如している点である。
【００２７】
この透光性吸音材パネル４における透光性吸音材６は、図１３（横断面図）図１４（縦断面図）に例示するように、四周枠材５、必要に応じて中間枠材７からなる枠材に、適宜間隔のビス止め、リベット止めなどによって取り付けられて、透光性吸音材パネル４を形成している。この場合、中間枠材７の仕様は先に述べた場合と同様である。
【００２８】
この四周枠材５は、金属製または透明樹脂製のＣ形チャンネル材を四角形に枠組みしたものであり、その四周枠内周面５ｄには透光性吸音材６を取付けるための金属製または合成樹脂製の取付け枠部材５０が固定されている。この取付け枠部材５０は、底部５０ｂの両側に屈曲片５０ａ、５０ｃを設けて、内側に開口した断面コ字状枠材であり、その底部５０ｂが前記四周枠内周面５ｄにビス、ボルトなどで取付けられ、内側の屈曲片５０ａには、前記透光性吸音材６の端部が固定されて、透光性吸音材パネル４を形成している。なお、外側の屈曲片５０ｃは、第１実施形態の防塵・防水カバー５２と同じく防塵・防水の役割を持つものであるので、屈曲片５０ａより長さを短くしてもよい。
なお、四周枠材５と取り付け枠部材５０は一体成形されたものでもよい。
【００２９】
この第２実施形態における、四周枠材５、中間枠材７の形状、材質などは先の場合と同様であり、図１３、１４以降に例示するように多孔質吸音材５５（７５）を装着することができる点も同様である。
【００３０】
また、四周枠内周面５ｂに透光性吸音材６を取付ける具体的な構造は、第１実施形態の図６に示す、パッキン６１が嵌着された透光吸音材６の端部が、押え金具６２で挟み込まれ、隙間調整材６３を介してビスやブラインドリベット６４で固定される構造が準用される。その固定間隔もまた同様である。また、中間枠材７の仕様、透光性吸音材６との取付け構造、中間枠材７の後端部に配置する緩衝材などについても同様である。
【００３１】
また、この第２実施形態でも、防塵・防水カバーの役目を持つ外側の屈曲片５０ｃで覆われた隙間と、透光吸音材６の固定箇所間の隙間を通じて、透光性吸音材６と透光遮音板２で囲まれた防音壁内部の通風が計られるので、内部が結露するなどの問題を回避できるのも同様である。
【００３２】
次ぎに、第２実施形態の防音壁の構造について、図１５を参照して上記透光性吸音材パネル４を既設の防音壁１へ取り付ける方法に基づいて、以下に説明する。
（ａ）この事例では、既設防音壁１として、Ｈ形支柱３の民地側フランジ３１ｂと、ウエブ部３２にボルト固定されたＬ形アングル状の固定金具３３の突設片部３３ａとの間に透光遮音板２が挟持され、Ｈ形支柱３、３間に配設された形態の防音壁が対象とされる。
【００３３】
（ｂ）前記のように構成した透光性吸音材パネル４を吊り上げて、取り付け予定位置まで運び、Ｈ形支柱３、３の上端部分から降下させ、Ｈ形支柱３の道路側フランジ３１ａと固定金具３３の突設片部３３ａとの間に、吸音材パネル４の四周枠材５を挿入することによって、透光性吸音材パネル４をＨ形支柱３、３間に設置することができる。この場合、図１７のように、透光性吸音材パネル４の上部に板ばね形状のばね部材５６ｂ、下部に弾性部材５６を用いて吸音材パネル４を緩みのないように固定することが好ましい。
【００３４】
（ｃ）以下、同様な要領で下段のパネルから逐次上段へと、パネルの上下間は隙間が生じないよう積み上げる。かくして、透光性吸音材６と透光遮音板２との間に所定の吸音空気層を設けて配置されることになる。なお、この吸音空間層は、厚さ５０〜１００ｍｍ程度が好ましいが、要求性能に応じて適宜に調整すればよいのは、第１実施形態と同様である。
【００３５】
以上説明したように、本発明では透光性吸音材パネル４を段積みするのであるが、この場合、図１７に示すように、Ｈ形支柱の道路側フランジ３１ａと固定金具の突設片部３３ａとの間に挟持される四周枠材５の上側下面５ａｕと下側上面５ａｄとを水平面に形成しておけば、実質的に隙間なく段積みできる。そして、道路側フランジ３１ａとのクリアランスには、ブロック状の弾性部材５６ａまたは板ばね形状のばね部材５６ｂなどを嵌め付けて固定するのが適当である。
【００３６】
さらに、図１８に示すように、四周枠材５の上側下面５ａｕと下側上面５ａｄとを同角度の傾斜面に形成しておいても、実質的に隙間なく段積みできる。この場合、道路側に向けて下り勾配に傾斜させたときは、上側四周枠材５の背面に突起片５７を垂下させて、下側四周枠材５の背面に係止させれば、相互の位置が拘束されるので、図１７における弾性部材５６ａを省略することもできる。
【００３７】
次ぎの図１６に示す、透光性吸音材パネル４を既設の防音壁のＨ形支柱のウエブ部へ取り付ける事例を示す。
既設のＨ形支柱のウエブ部３２が長すぎて、前記フランジ部３１への取り付けでは好ましくない場合には、第１実施形態の場合と同様にフランジ部３１の替わりにウエブ部３２に孔明け加工を行い、Ｌ形取付け金具８の基端部８１をボルトで留め付ける。ただし、このＬ形取付け金具８は、先の事例のＬ形取付け金具８とは異なり、パネル４固定用のボルト孔８２ｂなどは不要である。
【００３８】
次いで、このＬ形取付け金具８の延長部８２と固定金具の突設片部３３ａとの間で、透光性吸音材パネル４の四周枠材５が挟持された状態で段積みされるのであるが、その態様は先の場合と全く同様である。図１７、１８を用いた説明もこの場合に同様に適用されるのは言うまでもない。
【００３９】
【発明の効果】
本発明の吸音・透光性防音壁は、以上説明したように構成されているので、次ぎの優れた効果が得られる。
１）既設の透光遮音板からなる防音壁に簡単に取り付けられる透光性吸音材パネルによって吸音性を付加、向上させた防音壁が構成でき、防音壁面による騒音の反射を効果的に防止し、走行車輌の騒音を低下させることができる。
２）透光性吸音材パネルは、Ｈ形支柱の躯体に簡単に取り付けられるので、取り付け手間が大幅に軽減する。
【００４０】
３）透光性吸音材パネルには、中間枠材が設けられるので、車輌から飛び出した積み荷などを受け止め、道路の外側（民地側）への落下を防止できるので、安全性が向上する。
４）中間枠材と透光遮音板を密接させて、防音壁の遮音性を更に向上することもできる。
よって本発明は、従来の問題点を解消した吸音・透光性防音壁として、実用的価値はきわめて大なるものがある。
【図面の簡単な説明】
【図１】本発明が対象とする既設の防音壁の斜視図。
【図２】本発明の吸音・透光性防音壁の基本構造を示す概念図。
【図３】第１実施形態の透光性吸音材パネルの正面図。
【図４】同じく透光性吸音材パネルの横断面略図。
【図５】同じく透光性吸音材パネルの縦断面略図。
【図６】同じく透光吸音材パネルの側端部分の部分横断面図。
【図７】同じく透光吸音材パネル上部の部分縦断面図。
【図８】同じく透光吸音材パネル・の中間枠材・近傍の部分縦断面図。
【図９】同じく透光吸音材パネル・下部の部分縦断面図。
【図１０】同じくＨ形支柱近傍の横断面図。
【図１１】第１実施形態の変形例のＨ形支柱近傍の横断面図。
【図１２】第２実施形態の透光性吸音材パネルの正面図。
【図１３】同じく透光性吸音材パネルの横断面略図。
【図１４】同じく透光性吸音材パネルの縦断面略図。
【図１５】同じくＨ形支柱近傍の横断面図。
【図１６】第２実施形態の変形例のＨ形支柱近傍の横断面図。
【図１７】第２実施形態の透光性吸音材パネル上下の合わせ目近傍の縦断面略図。
【図１８】第２実施形態の変形例の透光性吸音材パネル上下の合わせ目近傍の縦断面略図。
【符号の説明】
１既設の防音壁、２透光遮音板、３Ｈ形支柱、４透光性吸音材パネル、５四周枠材、５ａ四周枠両側面、５ｂ四周枠前面、５１取り付け部、５２防塵・防水カバー、５３通気開口部、５４取付け金具部、６透光性吸音材、７中間枠材[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sound-absorbing / light-transmitting sound-proof wall in which a light-transmitting sound-insulating plate and a light-transmitting sound-absorbing material are attached with an interval. In particular, the present invention relates to a sound-absorbing / light-transmitting soundproof wall in which a light-transmitting sound-absorbing material is added and fixed to an existing soundproof wall.
[0002]
[Prior art]
Conventionally, as a sound-proof wall for light-transmitting roads, there is a sound-proof wall provided with a light-transmitting sound-insulating plate made of a transparent resin plate, although this sound-proof wall has a light-transmitting function and a sound-insulating function, Since the sound absorption function is poor, noise generated from vehicles traveling on the road is reflected on the soundproof wall, so that there is a problem that sufficient noise reduction effect cannot be obtained. There has been proposed a soundproof board having a structure with a slab. (See Patent Document 1)
[0003]
[Patent Document 1]
JP 2002-317408 A: For example, FIG. 4, FIG. 8, FIG. 9, paragraph [0022].
[0004]
In the method of Patent Document 1, a translucent sound absorbing material is attached to a soundproof wall built by fitting a translucent plate made of a transparent resin plate with a frame material into an H-shaped support. This is done by removing the presser material of the board once and then attaching the translucent sound absorbing material panel, which is made into a cartridge by framing the presser and support material and the four circumferences with a frame member, to the panel frame material of the translucent board For this reason, there was a problem that it took a lot of time and labor for installation on site. Furthermore, it is not suitable for adding a sound absorbing function to the existing soundproof wall 1 in which the transparent resin plate 2 as shown in FIG.
[0005]
[Problems to be solved by the invention]
The present invention has been made to solve the above-described problems, and it is easy to provide a light-transmitting sound absorbing material for an existing sound-proof wall in which a light-transmitting sound insulating plate is erected between H-shaped columns. Providing a sound-absorbing and translucent soundproof wall with added sound absorption that can be completed by assembly.
[0006]
[Means for Solving the Problems]
The above problem is that a translucent film-like material and a porous material are laminated on the target sound source side of an existing soundproof wall in which translucent sound insulation plates are fixed upright on left and right H-shaped support columns. A sound-absorbing / light-transmitting soundproof wall is obtained by attaching a light-transmitting sound-absorbing material panel with a light-transmitting sound-absorbing material attached to a four-frame frame member with a space between the light- transmitting sound-insulating plate and adding sound absorption. Te, light-transmitting sound absorbing material panels of that, by attaching the side edge portions of the four circumferential frame members to the existing the H-shaped struts, characterized in that mounted between the left and right H-shaped struts present invention The sound absorption and translucent soundproof wall can solve this problem.
The present invention is embodied in the following forms.
a) The sound absorbing / translucent soundproofing described above, wherein the side end portion of the four-frame frame material of the translucent sound absorbing material panel is attached to the intermediate metal fitting fixed in advance to the web portion of the H-shaped support column or the road side flange. wall.
b) For existing sound barriers with light-transmitting sound insulation plates standing on both sides of the left and right H-shaped support posts and L-shaped fixing brackets fixed to the web. The sound-absorbing / light-transmitting soundproof wall, wherein a side end portion of the four-frame member of the light-transmitting sound-absorbing material panel is inserted between the L-shaped fixing bracket and the road-side flange.
c) For existing sound barriers with light-transmitting sound insulation plates erected on both sides of the left and right H-shaped support posts and L-shaped fixing brackets fixed to the web. The sound absorption and the above-mentioned sound absorption / adhesive structure, wherein the side end portion of the four-frame member of the translucent sound-absorbing material panel is inserted and attached between the L-shaped fixing bracket and the L-shaped mounting bracket separately fixed to the web. Translucent soundproof wall.
[0007]
Further, according to the present invention, the four-frame member of the translucent sound-absorbing material panel is provided with a mounting bracket portion to the H-shaped support, a translucent sound-absorbing material mounting portion, a dustproof / waterproof cover, and a vent opening. The embodiment is preferably embodied in a form, and the four-frame member is formed of a metal member having a substantially U-shaped cross-section in a form in which an intermediate frame member is laid horizontally in the middle part or a four-frame member of a translucent sound absorbing material panel. It can also be embodied in a form in which a porous sound absorbing material is attached to the U-shaped recess.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, the first embodiment of the sound absorbing / translucent soundproof wall of the present invention will be described with reference to FIGS. 1 to 11 and the second embodiment with reference to FIGS.
As shown in the conceptual diagram of FIG. 2, the sound-absorbing / light-transmitting sound-proof wall of the present invention is a) an existing sound-proof wall in which a light-transmitting sound-insulating plate 2 is erected between left and right H-shaped columns 3 and 3. 1 and b) Translucent sound absorption layered with a translucent film-like material and a porous material attached to the target sound source side of the existing soundproof wall 1 with a space between the translucent sound insulation plate 2 It is comprised from the translucent sound-absorbing material panel 4 which attached the material 6 to the quadrilateral frame material 5. FIG.
[0009]
As the existing soundproof wall 1, as shown in FIG. 1, translucent sound insulation board 2 made of transparent resin is opposite to the road of H-shaped support columns 3 and 3 built at a predetermined interval (private side). (The cross-sectional structure will be described later). The translucent sound insulating plate 2 is a transparent plate made of acrylic resin or polycarbonate resin, and is generally a large plate having a thickness of 5 to 15 mm, a height of 2000 to 5000 mm, and a lateral width of about 2000 mm.
[0010]
(First embodiment)
Next, the translucent sound absorbing material panel 4 used in the present invention will be described with reference to FIGS.
As shown in FIG. 3 which is a front view, the translucent sound-absorbing material panel 4 is a translucent film-like material, for example, a fluororesin film such as polyvinyl fluoride or polyfluorinated ethylene, polyester, polypropylene, or polyvinyl chloride. A transparent film material having a thickness of about 0.006 to 2 mm and a porous material, for example, a metal or resin mesh plate-like material such as a metal wire mesh, an expanded metal, a punching metal sheet, Basically, the light-transmitting sound-absorbing material 6 is formed by laminating and integrating perforated plate-like materials, and a four-frame member 5 that fixes the outer peripheral portion thereof.
[0011]
As shown in FIG. 4 (transverse cross-sectional view) and FIG. 5 (vertical cross-sectional view), the translucent sound-absorbing material 6 is attached to a frame material composed of a quadruple frame material 5 and an intermediate frame material 7 with screws at appropriate intervals, The light-transmitting sound absorbing material panel 4 is formed by being attached by riveting or the like. In this case, the intermediate frame member 7 is a C-shaped or rectangular tube member that is laid horizontally in an appropriate middle of the four-frame member 5 for reinforcement when the height of the four-frame member 5 is 50 cm or more. Although there is, it is not necessarily an essential member.
[0012]
This quadruple frame member 5 is a C-shaped channel member made of metal or transparent resin and is framed in a quadrangular shape, and the mounting portion 51 of the translucent sound absorbing material 6 and the mounting portion 51 are covered on the front surface 5b of the quadruple frame. A dustproof / waterproof cover 52 is provided so as to project, and a ventilation opening 53 is provided through the gap covered by the dustproof / waterproof cover 52 to communicate with the opening between the mounting parts 51, and both sides 5a of the four-frame frame are provided. For example, a mounting bracket portion 54 to the H-shaped support column 3, for example, an angle member, is protruded laterally.
[0013]
6 is a cross-sectional view of the side end portion of the translucent sound absorbing material panel 4, FIG. 7 is an upper longitudinal cross section of the translucent sound absorbing material panel 4, and FIG. 8 is an intermediate frame member 7 of the translucent sound absorbing material panel 4. FIG. 9 shows the details of the lower longitudinal section of the translucent sound absorbing material panel 4 and the longitudinal section in the vicinity.
[0014]
The quadrilateral frame material 5 is preferably made of a metal such as iron or aluminum from the viewpoint of strength, but it can also be made of transparent synthetic resin. When a porous sound absorbing material 55 (75) is attached to the substantially U-shaped recess 5c (7c) of these four-circumferential frame members 5 (including the intermediate frame member 7) as illustrated in FIG. (Sound absorption rate) can be increased, which is preferable. The sound absorbing material 55 (75) may be attached to the entire length and width, or may be attached partially.
[0015]
In these drawings, the details of the attaching portion 51 of the translucent sound absorbing material 6 provided on the front surface 5b of the four-frame frame are illustrated. In this attachment portion 51, the end of the translucent sound absorbing material 6 to which the packing 61 is fitted is sandwiched between the presser fittings 62, and is attached to the front surface 5 b of the quadrilateral frame via the gap adjusting material 63 with blind rivets or screws 64. It is fixed. Such attachment parts 51 are provided at intervals of 100 mm to 300 mm over the four circumferences of the four-frame member 5.
In order to obtain air permeability, the gap adjusting material 63 uses a washer having a size of about 10 mm to 20 mm, but may be used in combination with a threading material.
[0016]
The intermediate frame member 7 is a U-shaped or square tube-shaped member and can be made of the same material as the four-frame member, but is preferably made of metal for the purpose of receiving external impacts, It is preferable to arrange one or a plurality so that the distance between them is 500 mm or less. The intermediate frame member 7 and the translucent sound-absorbing material 6 are fixed by blind rivets or screws 74 via the presser fitting 72 and the gap adjusting member 73 in substantially the same manner as in the case of the four-round frame member 5. .
[0017]
And when attaching the translucent sound-absorbing material panel 4, if the rear end portion of the intermediate frame member 7 is brought into close contact with the translucent sound-insulating plate 2, the sound-insulating property in the low frequency range is obtained by suppressing the plate vibration of the translucent sound-insulating plate 2. Several dB can be improved. In this case, it is preferable to attach a buffer material 71 to the rear end portion 7a of the intermediate frame member 7 that comes into contact with the translucent sound insulating plate 2 (see FIG. 5).
[0018]
Further, since a ventilation opening 53 is provided through the gap covered with the dustproof / waterproof cover 52 to the opening between the mounting parts 51, it is surrounded by the translucent sound absorbing material 6 and the translucent sound insulating board 2. Ventilation inside the sound barrier is measured, so problems such as condensation inside can be avoided. Further, since the ventilation opening 53 and the mounting portion 51 of the translucent sound absorbing material 6 are covered with the dustproof / waterproof cover 52, the intrusion of dust and rainwater is prevented and protected.
[0019]
Next, the structure of the soundproof wall according to the first embodiment will be described below with reference to FIG. 10 based on how the light-transmitting sound absorbing material panel 4 described above is attached to the existing soundproof wall 1.
(A) Drilling the road-side flange portion 31 of the H-shaped support column 3 of the existing soundproof wall 1, and attaching the L-shaped mounting bracket 8, which is a bracket whose base end portion 81 and extension portion 82 are bent into an L shape, The base end portion 81 is brought into contact with the web portion 32, and the distal end portion of the extension portion 82 is protruded and fastened with a bolt.
[0020]
The L-shaped bracket 8 is an intermediate bracket for coupling the H-shaped support column 3 and the translucent sound-absorbing material panel 4, and its extension 82 has a bolt hole 82 a coupled to the back surface of the flange portion 31, and A bolt hole 82b that is coupled to the mounting bracket portion 54 of the translucent sound absorbing material panel 4 is prepared at the protruding tip portion. These bolt holes 82a and 82b are preferably long holes whose positions can be adjusted. It is preferable that the L-shaped bracket 8 has a shape that can be shared with the case shown in FIG.
[0021]
(B) Lift the translucent sound-absorbing material panel 4 and carry it to the planned mounting position, and fix the L-shaped mounting bracket 8 attached to the H-shaped support column and the mounting bracket portion 54 on the panel side with bolts; A predetermined sound-absorbing air layer is provided between the light-transmitting sound insulating plate 2 and disposed. In the same manner, the lower panel is sequentially stacked from the upper panel. Arrange so that there is no gap between the top and bottom of the panel. In this case, the bolt hole 54a prepared in the mounting bracket portion 54 on the panel side is preferably formed as a long hole whose position can be adjusted perpendicular to the bolt hole 82b of the L-shaped bracket 8.
[0022]
The space (air layer) between the translucent sound insulating plate 2 and the translucent sound absorbing material 6 is preferably about 50 to 100 mm in thickness, but may be appropriately adjusted according to the required performance. Increasing the air layer increases the sound absorption coefficient in the low frequency range, and decreasing the air layer decreases the sound absorption coefficient in the low frequency range. The air layer thickness can be adjusted by changing the thickness of the quadrilateral frame material or adjusting the size and position of the mounting bracket. Moreover, it is good to attach the fall prevention wire rope fixed to the support | pillar to the translucent sound-absorbing material panel.
[0023]
The example illustrated in FIG. 11 is an example in which the translucent sound absorbing material panel 4 is attached to the web portion of the H-shaped column of the existing soundproof wall 1.
If the web portion 32 of the existing H-shaped support column is too long and is not preferable for attachment to the flange portion 31, the web portion 32 is perforated instead of the flange portion 31, and the L-shaped mounting bracket 8 The proximal end portion 81 is fastened with a bolt. The L-shaped mounting bracket 8 may have the same form as the L-shaped mounting bracket 8 of the previous example. In this case, the translucent sound-absorbing material panel 4 can be fixed using the bolt hole 82b having a long hole whose position can be adjusted, as in the previous example.
[0024]
In the translucent sound-absorbing material panel 4 illustrated in FIG. 11, the translucent sound-absorbing material 6 is stretched in the inner peripheral surface of the four-frame member 5 (second embodiment), unlike the previous ones. However, in the present invention, such a form is also included.
Hereinafter, as in the previous case, the light-transmitting sound absorbing material panel 4 is lifted and carried to the planned mounting position, and the soundproof wall is formed by a series of construction work such as fixing and mounting the prepared L-shaped mounting bracket 8 with bolts. It can be configured.
[0025]
(Second Embodiment)
Next, a sound absorbing / translucent soundproof wall according to a second embodiment of the present invention will be described with reference to FIGS.
This embodiment is also intended for the existing sound barrier 1 illustrated and described above in FIG. 1, and as shown in the conceptual diagram of FIG. An existing soundproof wall 1 standing between 3 and 3, b) a translucent sound- proofing plate 1 attached to the target sound source side of the existing soundproof wall 1 with a space between the light-transmitting sound-insulating plate 2 The point comprised from the translucent sound-absorbing material panel 4 which attached the translucent sound-absorbing material 6 which laminated | stacked the film-form material and the porous material to the quadrilateral frame material 5 is the same as that of 1st Embodiment.
[0026]
Next, the translucent sound absorbing material panel 4 in the second embodiment will be described. The translucent sound-absorbing material panel 4 is shown in FIG. 12 which is a front view, but the basic structure is the same as in the case of FIG. 3 described above. A specific difference from that of FIG. 3 is that the embodiment of FIG. 12 lacks mounting bracket portions (shown as 54 in FIG. 4) provided on both sides in FIG. is there.
[0027]
The translucent sound absorbing material 6 in the translucent sound absorbing material panel 4 includes a four-round frame member 5 and, if necessary, an intermediate frame member 7 as illustrated in FIG. 13 (transverse sectional view) and FIG. 14 (vertical sectional view). A translucent sound-absorbing material panel 4 is formed by being attached to a frame material made of the above by screwing or riveting at appropriate intervals. In this case, the specifications of the intermediate frame member 7 are the same as those described above.
[0028]
This quadrilateral frame material 5 is a metal or transparent resin C-shaped channel material framed in a quadrangular shape, and is made of metal or synthetic material for attaching a translucent sound absorbing material 6 to the four-circumferential frame inner peripheral surface 5d. A resin mounting frame member 50 is fixed. The mounting frame member 50 is a U-shaped frame member having a bent portion 50a, 50c provided on both sides of the bottom 50b and opened inward. The bottom 50b is connected to the inner peripheral surface 5d of the four-frame frame with screws, bolts, etc. The end of the translucent sound absorbing material 6 is fixed to the inner bent piece 50a to form the translucent sound absorbing material panel 4. Since the outer bent piece 50c has the role of dustproof / waterproof like the dustproof / waterproof cover 52 of the first embodiment, the length may be shorter than the bent piece 50a.
The four-frame member 5 and the attachment frame member 50 may be integrally formed.
[0029]
In this second embodiment, the shape and material of the four-round frame member 5 and the intermediate frame member 7 are the same as in the previous case, and the porous sound absorbing material 55 (75) is mounted as illustrated in FIGS. The point that can be done is also the same.
[0030]
The specific structure for attaching the translucent sound absorbing material 6 to the inner peripheral surface 5b of the four-frame frame is as shown in FIG. 6 of the first embodiment, where the end of the translucent sound absorbing material 6 fitted with the packing 61 is A structure that is sandwiched between the presser fittings 62 and fixed with screws or blind rivets 64 via a gap adjusting member 63 is applied mutatis mutandis. The fixed interval is also the same. The same applies to the specifications of the intermediate frame member 7, the mounting structure with the translucent sound absorbing material 6, and the cushioning material disposed at the rear end of the intermediate frame member 7.
[0031]
Also in the second embodiment, the light-transmitting sound absorbing material 6 and the light-transmitting sound absorbing material 6 are transmitted through the clearance covered with the outer bent piece 50 c serving as a dustproof / waterproof cover and the space between the fixed portions of the light transmitting sound absorbing material 6. Since the ventilation inside the soundproof wall surrounded by the light insulation board 2 is measured, the problem that the inside is condensed can be avoided.
[0032]
Next, the structure of the soundproof wall according to the second embodiment will be described below with reference to FIG. 15 based on a method of attaching the light transmissive sound absorbing material panel 4 to the existing soundproof wall 1.
(A) In this example, the existing soundproof wall 1 is a space between the private side flange 31b of the H-shaped support column 3 and the protruding piece 33a of the L-shaped angled fixing bracket 33 bolted to the web 32. The sound-proof wall 2 is sandwiched between the H-shaped support columns 3 and 3 and the sound-proof wall is used as a target.
[0033]
(B) The translucent sound-absorbing material panel 4 configured as described above is lifted and carried to the intended mounting position, lowered from the upper end portions of the H-shaped columns 3 and 3, and fixed to the road-side flange 31 a of the H-shaped column 3. The translucent sound-absorbing material panel 4 can be installed between the H-shaped columns 3 and 3 by inserting the quadrilateral frame material 5 of the sound-absorbing material panel 4 between the protruding piece portions 33 a of the metal fitting 33. In this case, as shown in FIG. 17, it is preferable to fix the sound absorbing material panel 4 so as not to loosen by using a leaf spring shaped spring member 56b on the upper part of the translucent sound absorbing material panel 4 and an elastic member 56 on the lower part. .
[0034]
(C) In the same manner, the lower panels are sequentially stacked from the lower panel to the upper stage so that there is no gap between the upper and lower panels. Thus, a predetermined sound-absorbing air layer is provided between the translucent sound absorbing material 6 and the translucent sound insulating plate 2. The sound absorbing space layer preferably has a thickness of about 50 to 100 mm, but may be adjusted appropriately according to the required performance, as in the first embodiment.
[0035]
As described above, in the present invention, the translucent sound-absorbing material panels 4 are stacked. In this case, as shown in FIG. 17, the road-side flange 31a of the H-shaped column and the protruding piece portion of the fixing bracket If the upper lower surface 5au and the lower upper surface 5ad of the quadrilateral frame member 5 sandwiched between the upper peripheral surface 33a and the lower upper surface 5ad are formed on a horizontal plane, they can be stacked substantially without gaps. It is appropriate to fit and fix a block-shaped elastic member 56a or a leaf spring-shaped spring member 56b to the clearance with the road side flange 31a.
[0036]
Furthermore, as shown in FIG. 18, even if the upper lower surface 5au and the lower upper surface 5ad of the quadrilateral frame member 5 are formed on inclined surfaces having the same angle, they can be stacked substantially without gaps. In this case, when inclined downwardly toward the road side, if the projecting piece 57 is suspended from the back surface of the upper quadrilateral frame member 5 and locked to the back surface of the lower quadruple frame member 5, Since the position is constrained, the elastic member 56a in FIG. 17 can be omitted.
[0037]
The example which attaches the translucent sound-absorbing material panel 4 shown in the following FIG. 16 to the web part of the H-shaped support | pillar of the existing soundproof wall is shown.
If the web portion 32 of the existing H-shaped support column is too long and is not preferable to be attached to the flange portion 31, the web portion 32 is punched instead of the flange portion 31 as in the first embodiment. The base end portion 81 of the L-shaped mounting bracket 8 is fastened with a bolt. However, unlike the L-shaped mounting bracket 8 of the previous example, the L-shaped mounting bracket 8 does not require the bolt hole 82b for fixing the panel 4 or the like.
[0038]
Next, the four-frame member 5 of the translucent sound-absorbing material panel 4 is stacked between the extension 82 of the L-shaped mounting bracket 8 and the protruding piece 33a of the fixing bracket. However, the mode is exactly the same as the previous case. It goes without saying that the description using FIGS. 17 and 18 is similarly applied in this case.
[0039]
【The invention's effect】
Since the sound absorbing / translucent soundproof wall of the present invention is configured as described above, the following excellent effects can be obtained.
1) A light-transmitting sound-absorbing material panel that can be easily attached to a sound-proof wall made of an existing light-transmitting sound-insulating plate makes it possible to construct a sound-proof wall with improved sound absorption, effectively preventing noise reflection from the sound-proof wall. The noise of the traveling vehicle can be reduced.
2) Since the translucent sound-absorbing material panel can be easily attached to the housing of the H-shaped support column, the installation labor is greatly reduced.
[0040]
3) Since the translucent sound-absorbing material panel is provided with an intermediate frame material, it is possible to receive the cargo that has jumped out of the vehicle and prevent it from falling to the outside (private side) of the road, thus improving safety.
4) The sound insulation of the soundproof wall can be further improved by bringing the intermediate frame material and the translucent sound insulation board into close contact with each other.
Therefore, the present invention has extremely great practical value as a sound-absorbing and translucent soundproof wall that has solved the conventional problems.
[Brief description of the drawings]
FIG. 1 is a perspective view of an existing soundproof wall targeted by the present invention.
FIG. 2 is a conceptual diagram showing a basic structure of a sound absorbing / translucent soundproof wall according to the present invention.
FIG. 3 is a front view of the translucent sound absorbing material panel according to the first embodiment.
FIG. 4 is a schematic cross-sectional view of the same translucent sound absorbing material panel.
FIG. 5 is a schematic vertical cross-sectional view of the same translucent sound absorbing material panel.
FIG. 6 is a partial cross-sectional view of a side end portion of the translucent sound absorbing material panel.
FIG. 7 is a partial vertical cross-sectional view of the upper part of the same translucent sound absorbing material panel.
FIG. 8 is a partially longitudinal cross-sectional view of the translucent sound-absorbing material panel / intermediate frame member / vicinity.
FIG. 9 is a partial longitudinal cross-sectional view of the lower part of the light-transmitting sound absorbing panel.
FIG. 10 is a cross-sectional view of the vicinity of the H-shaped support.
FIG. 11 is a cross-sectional view of the vicinity of an H-shaped support in a modification of the first embodiment.
FIG. 12 is a front view of a translucent sound absorbing material panel according to a second embodiment.
FIG. 13 is a schematic cross-sectional view of the same translucent sound absorbing material panel.
FIG. 14 is a schematic vertical cross-sectional view of the same translucent sound absorbing material panel.
FIG. 15 is a cross-sectional view of the vicinity of the H-shaped support.
FIG. 16 is a cross-sectional view of the vicinity of an H-shaped column in a modification of the second embodiment.
FIG. 17 is a schematic vertical cross-sectional view of the vicinity of the joint at the top and bottom of the translucent sound absorbing material panel of the second embodiment.
FIG. 18 is a schematic vertical cross-sectional view in the vicinity of a joint at the top and bottom of a light-transmitting sound-absorbing material panel according to a modification of the second embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Existing soundproof wall, 2 Light transmission sound insulation board, 3 H-type support | pillar, 4 Light transmission sound-absorbing material panel, 5 Four-frame frame material, 5a Both sides of a four-frame frame, 5b Four-frame frame front, 51 Mounting part, 52 Dust-proof / waterproof cover , 53 Ventilation opening, 54 Mounting bracket, 6 Translucent sound absorbing material, 7 Intermediate frame material

Claims

Translucent sound-absorbing sound-transmitting sound-absorbing sound-absorbing sound-absorbing sound-absorbing sound-absorbing sound-absorbing sound-insulating plates that are fixed to the left and right H-shaped struts. translucent sound absorbing material panels attached to four sides frame members of wood, a sound absorbing and sound translucent sound barrier by adding a sound absorbing attached with a space between the translucent sound insulation plate, its permeable A sound-absorbing and translucent soundproofing wall characterized in that a light-absorbing sound-absorbing material panel is mounted between the left and right H-shaped struts by attaching side edges of the four-frame frame material to the existing H-shaped struts. .

The sound absorbing / light transmitting device according to claim 1, wherein the side end portion of the four-frame member of the light transmitting sound absorbing material panel is attached to an intermediate metal fitting fixed in advance to a web portion of the H-shaped support column or a road side flange. Soundproof wall.

For an existing soundproof wall in which a light-transmitting sound insulation plate is fixed between the private flanges of the left and right H-shaped columns and the L-shaped fixing bracket fixed to the web. The sound-absorbing / light-transmitting soundproof wall according to claim 1, wherein a side end portion of a four-frame member of the light-transmitting sound-absorbing material panel is inserted and attached between an L-shaped fixing bracket and a road-side flange.

For an existing soundproof wall in which a light-transmitting sound insulation plate is fixed between the private flanges of the left and right H-shaped columns and the L-shaped fixing bracket fixed to the web. The side end portion of the four-frame member of the translucent sound-absorbing material panel is inserted and attached between the L-shaped fixing bracket and the L-shaped mounting bracket separately fixed to the web. Sound-absorbing and translucent soundproof wall.

Wherein the four sides frame member of the translucent absorbing member panel, mounting bracket portions to H-shaped struts, the mounting portion of the light transmitting sound absorbing material, dustproof and waterproof cover, to claim 1 or 2 ventilation opening is provided The sound-absorbing and translucent soundproof wall described.

The sound absorbing / translucent soundproof wall according to any one of claims 1 to 5 , wherein an intermediate frame member is horizontally mounted on an intermediate portion of the four-circumferential frame member.

The sound absorbing / transmitting material according to any one of claims 1 to 6, wherein the four-frame member of the translucent sound absorbing material panel is formed of a metal member having a substantially U-shaped cross section, and a porous sound absorbing material is attached to the U-shaped recess. Soundproof wall.