JP4776121B2

JP4776121B2 - Soundproof material

Info

Publication number: JP4776121B2
Application number: JP2001295164A
Authority: JP
Inventors: 伸一郎高橋; 徹橋村; 誠二笹部; 俊光田中
Original assignee: Kobe Steel Ltd
Current assignee: Kobe Steel Ltd
Priority date: 2001-09-26
Filing date: 2001-09-26
Publication date: 2011-09-21
Anticipated expiration: 2021-09-26
Also published as: JP2003108145A

Description

【０００１】
【発明の属する技術分野】
本発明は、鉄道車両（新幹線、地下鉄、在来線）の構造部材、自動車の構造部材、防音壁（新幹線、高速道路、国道）、道路用吸音板（裏面吸音板、掘割水平吸音板、掘割・トンネル用壁面吸音板）等に使用される防音部材に関し、特に吸音性を有するアルミニウム押出形材からなる防音部材に関する。
【０００２】
【従来の技術】
例えば、車輌の構造部材、特に、表面に配置される表面部材として、２枚の平行な面板部間にジグザグ状のリブ又は仕切を設けたアルミニウム押出形材が使用されており、このアルミニウム押出形材を使用することにより構造部材の軽量化を図っている。しかし、アルミニウム形材は音を伝えやすいため、乗客又は乗員の乗り心地を良くするためには、騒音の低減対策をとる必要がある。
【０００３】
そこで、従来、新幹線及び自動車においては、固有振動音に対して車体に制振材を取り付けたり、エンジンから発生する音並びに車輪からのロードノイズ及び転動音等に関する騒音対策として、車輌の内面、床裏面、及びスカート内側表面、並びに内部のエンジンの周辺に、吸音材を設置したり、また構造部材の剛性を高めたりすることが実施されている。
【０００４】
一方、新幹線及び自動車のように高速走行する車両については、高速気流による風切り音に対する騒音対策が必要となる場合がある。その場合には、車輌表面の構造部材（以下、表面部材ともいう）に防音性能を付加する必要がある。このためには、吸音材を表面部材の表面に張り付けたり、表面部材自体を吸音材で構成することが考えられるが、一般に使用される吸音材は柔軟なものが多く、表面部材の一部として機械的強度が不足する。
【０００５】
従って、風切り音に対する騒音対策としては、機械的強度の保持及び吸音材の飛散防止の観点から、例えば、風速６０乃至９０ｋｍ／ｓの場合には、車輌の構造部材上に、下から、吸音材、ガラス布、金属屑、金網を重ねた防音素材の上に、高速気流による吸音材及びガラス布等の飛散を防止するために、開口率が２０％以上の多孔金属板を重ねた防音部材を設けるのが一般的である。この多孔金属板は防音素材を押さえるものであり、騒音の音波が多孔金属板により反射せずに、吸音材及びガラス布に到達するようにするため、開口率が２０％以上と高いものとなっている。
【０００６】
【発明が解決しようとする課題】
しかしながら、従来の防音部材は、防音素材を多層に重ねたものであり、比重が重い材料を複数使用する必要があるため、質量が重くなり、耐久性も不十分である。また、表面の平滑性が低く、意匠性が低いという欠点がある。更に、体積が大きくなり、製造コストも高くなるという難点がある。
【０００７】
本発明はかかる問題点に鑑みてなされたものであって、平滑性が高く、外観性が優れており、軽量及び小型であると共に、耐久性及び機械的強度が高く、製造コストが低い防音部材を提供することを目的とする。
【０００８】
【課題を解決するための手段】
本発明に係る防音部材は、１対の平行面板部間にリブを連結した構造の断面形状を有するアルミニウム又はアルミニウム合金押出形材と、この形材の一方の面板部の外面に押出方向に線状に延びるように設けられた複数個の突起部と、前記一方の面板部から間隔をおくように前記突起部に固定され複数の貫通孔が形成された多孔の複数個の平行の金属板とを有することを特徴とする。
【００１０】
この場合に、金属板の突起部への固定方法は、以下の態様が好ましい。
【００１１】
即ち、請求項１に記載の発明においては、前記突起部の側面には溝が形成されており、前記金属板は対向する１対の突起部の前記溝に嵌合され接着されて前記突起部に固定されている。
【００１２】
請求項２に記載の発明においては、前記突起部には、前記一方の面板部の表面に平行に延出するフランジ部が形成されており、前記金属板はこのフランジ部の上面にリベットにより接合されて前記突起部に固定されている。
【００１３】
請求項３に係る発明においては、前記突起部には、前記一方の面板部の表面に平行に延出するフランジ部が形成されており、前記金属板はその両端部が折り返されており、この両端部が前記フランジ間又は前記フランジと前記面板部との間の隙間に嵌合されて前記フランジの下面にリベットにより接合されて前記突起部に固定されている。
【００１４】
請求項４に係る発明においては、前記突起部は、前記一方の面板部の外面に一方向に延びるように相互に平行に形成された線状突起部であり、前記金属板は、前記線状突起部の形状に整合するように屈曲してリブを形成しており、前記金属板は前記リブの頂部で前記突起部の頂部にリベットにより接合されて前記突起部に固定されている。
【００１５】
請求項５に係る発明においては、前記突起部は前記一方の面板部の外面に一方向に延びるように相互に平行に形成されていると共に、前記突起部にはその頂部から前記外面に平行に延出するフランジ部が形成されており、前記金属板は前記フランジ部に整合するように湾曲して曲面部を形成しており、前記金属板は前記曲面部で前記突起部のフランジ部にリベットにより接合されて前記突起部に固定されている。
【００１６】
なお、請求項２乃至５のいずれかに記載の発明においては、前記金属板が複数個である場合に、最外側の金属板は平板で前記突起部の頂部にリベットにより接合されて前記突起部に固定されているように構成することができる。
【００１７】
請求項７に係る発明においては、前記突起部は、前記一方の面板部の外面に一方向に延びるように相互に平行に形成された線状突起部であり、前記金属板は、前記線状突起部の形状に整合するように屈曲してリブを形成しており、前記金属板は前記リブの頂部で前記突起部の頂部に重ね摩擦接合により接合されて前記突起部に固定されている。
【００１８】
請求項８に係る発明においては、前記突起部は前記一方の面板部の外面に一方向に延びるように相互に平行に形成されていると共に、前記突起部にはその頂部から前記外面に平行に延出するフランジ部が形成されており、前記金属板は前記フランジ部に整合するように湾曲して曲面部を形成しており、前記金属板は前記曲面部で前記突起部のフランジ部に重ね摩擦接合により接合されて前記突起部に固定されている。
【００１９】
請求項７又は８に記載の発明においては、前記金属板が複数個である場合に、最外側の金属板は平板で前記突起部の頂部に重ね摩擦接合により接合されて前記突起部に固定されているように構成することができる。
【００２０】
請求項１０に係る発明においては、前記金属板には、前記突起部に嵌合するリブが形成されており、前記金属板のリブを前記突起部に、スポット溶接、アーク溶接、レーザ溶接、重ね摩擦接合若しくはリベット接合又はスポット溶接、アーク溶接、レーザ溶接若しくは重ね摩擦接合とリベット接合との併合により接合されて、前記金属板が前記突起部に固定されている。
【００２１】
本発明に係る他の防音部材は、１対の平行面板部間にリブを連結した構造の断面形状を有するアルミニウム又はアルミニウム合金押出形材と、この形材の一方の面板部の外面に押出方向に線状に延びるように設けられた複数個の突起部と、前記一方の面板部から間隔をおくように前記突起部の相互間に配置された多孔金属成形体とを有し、前記多孔金属成形体は複数の貫通孔が形成された多孔金属板を波状に成形したもの又は複数の貫通孔が形成された多孔金属板を箱形に組み立てたものであり、使用温度よりも高温の形材の前記突起部間に前記多孔金属成形体を嵌合し、降温させた使用温度で焼き締めにより前記金属成形体が前記突起部に固定されていることを特徴とする。
【００２２】
本発明に係る更に他の防音部材は、１対の平行面板部間にリブを連結した構造の断面形状を有するアルミニウム又はアルミニウム合金押出形材と、この形材の一方の面板部の外面に押出方向に線状に延びるように設けられた複数個の突起部と、この複数個の突起部を連絡するように前記突起上に重ねられて前記突起部に固定された表面板と、この表面板の前記形材側の面における前記突起部間の位置に固定された多孔金属成形体とを有し、前記多孔金属成形体は複数の貫通孔が形成された多孔金属板を波状に成形したもの又は複数の貫通孔が形成された多孔金属板を箱形に組み立てたものであり、前記突起部は前記多孔金属成形体間に形成される溝に嵌合していることを特徴とする。
【００２３】
なお、本発明において、金属板とは、金属単体に加えて合金製の板も含むことは勿論である。
【００２４】
本発明においては、複数の貫通孔を有する多孔金属板（又は多孔金属成形体）を、アルミニウム又はアルミニウム合金製押出形材の外面から、間隔をおいて配置したので、ヘルムホルツ共鳴原理と粘性減衰原理により共鳴周波数周辺の周波数帯域及びそれ以外の広範囲な周波数域での騒音を良好に吸収して、防音効果を発揮させることができる。これにより、金属板に防音性を付加することができる。また、この多孔金属板（又は多孔金属成形体）が最外面に位置するので、表面の平坦性が高く、多孔金属板（又は多孔金属成形体）は金属又は合金からなるので耐久性が優れている。
【００２５】
本発明においては、構造部材としての形材をアルミニウム又はアルミニウム合金の押出形材としたので、軽量化することができると共に、金属板として、アルミニウム又はアルミニウム合金板を使用することにより、更に軽量化することができる。
【００２６】
【発明の実施の形態】
以下、添付の図面を参照して本発明の実施例について具体的に説明する。図１は本発明の第１実施例に係る防音部材１を示す断面図である。防音部材１は形材２と、この形材２に形材２との間に間隔をおいて固定された２枚の多孔金属板４とを有する。形材２は、その断面形状が、１対の面板部２ａ、２ｂを平行に配置し、面板部２ａ、２ｂ間に面板部２ａ、２ｂに対して傾斜したリブ２ｃを架け渡した構造を有する。そして、この形材２の一方の面板部２ｂの外面には適長間隔で突起部３が形成されている。この形材２は、アルミニウム又はアルミニウム合金を押出成形することにより製造されている。
【００２７】
形材２の突起部３は、断面が台形状又は矩形状をなし、その両側面には、高さ方向の略半分の位置に、面板部２ｂの外面に平行に切り込まれた溝５が形成されている。また、突起部３の上端部には、段差６が形成されている。なお、突起部３を含めて形材２は押出成形により成形されているので、突起部３は図１の紙面に垂直の方向に延びており、線状突起部となっている。
【００２８】
そして、各突起部３間に２枚の多孔金属板４が面板部２ｂに対して間隔をおき、また相互間に間隔をおくようにして、面板部２ｂに平行に配置されており、内側の多孔金属板４は対向する１対の突起部３の溝５内に嵌合されて固定され、外側の多孔金属板４は対向する１対の突起部３の段差６に接着剤により接合されて固定されている。なお、内側の多孔金属板４も溝５に嵌合すると共に、接着剤を使用して突起部３に固定しても良い。
【００２９】
多孔金属板４は金属板に多数の貫通孔を穿設したものであり、アルミニウム若しくはアルミニウム合金板又は鋼板等により製造することができる。なお、リサイクル性から、多孔金属板４は形材のアルミニウム又はアルミニウム合金と同種の素材を使用することが好ましい。また、多孔金属板４としてアルミニウム又はアルミニウム合金板を使用することにより、形材２がアルミニウム又はアルミニウム合金の押出形材であることと相まって、防音部材１をより一層軽量化することができる。
【００３０】
このように構成された防音部材においては、形材２の面板部２ｂから適長間隔をおいて２枚の多孔金属板４を配置したので、ヘルムホルツ共鳴原理と粘性減衰原理とにより共鳴周波数周辺の周波数帯域及びそれ以外の広範囲な周波数域での騒音を良好に吸収して防音効果を発揮することができる。そして、本実施例においては、外側の多孔金属板４の表面と、突起部３の上端面とが略面一であり、この防音部材１を車輌の表面部材として使用した場合に、その外面は凹凸がなく平坦なものとなり、意匠性に優れている。
【００３１】
なお、この防音部材１の製造工程においては、接着剤として熱硬化性樹脂を使用し、形材２を焼鈍炉内に挿入して焼鈍する際に、前記熱硬化性樹脂を同時に硬化させるようにすることにより、工程の短縮化を図ることができる。
【００３２】
次に、図２を参照して本発明の第２実施例について説明する。図２において、図１と同一構成物には同一符号を付してその詳細な説明は省略する。形材２の外面には、適長間隔で複数の突起部３ａが形成されている。この突起部３ａは面板部２ｂに垂直に立設されており、面板部２ｂの表面を線状に相互に平行に延びている。
【００３３】
この突起部３ａには、その中間部に、横方向に延出するフランジ７が形成されており、内側の多孔金属板４は対向する突起部３ａ間の間隔と一致する幅を有しており、その両端部が対向する突起部２ａの各中間部のフランジ７の上面に重ねられ、リベット８によりフランジ７に接合されて固定されている。外側の多孔金属板４ａは防音部材１の全体を覆う大きな１枚の板であり、各突起部３ａの上端部にリベット８により接合されて固定されている。
【００３４】
本実施例においては、多孔金属板４、４ａと突起部３ａとをリベット８により接合しているが、図１に示す第１実施例と同様の効果を奏する。なお、外側の多孔金属板４ａも各突起部３ａにおいて分断されたものとすることもできる。しかし、本実施例のように、外側の多孔金属板４ａを防音部材１の全体を覆うような大板とすることにより、防音部材１の強度を高めることができ、また、防音部材１の外面が完全に平坦となり、意匠性が極めて優れたものとなる。
【００３５】
図３（ａ）は本発明の第３実施例を示す斜視図、図３（ｂ）は図３（ａ）のＡ−Ａ線による断面図である。図３（ａ）、（ｂ）において、図２と同一構成物には同一符号を付してその詳細な説明は省略する。本実施例は、図２に示す第２実施例の外側の多孔金属板４ａの代わりに、矩形の凸部４０ｂを突起部３ａ間に設けた多孔金属板４ｂを使用したものである。この凸部４０ｂは平面視で突起部３ａの長手方向に延び、矩形の島状のものである。
【００３６】
本実施例においては、多孔金属板４ｂに凸部４０ｂが成形されているので、剛性が高く、多孔金属板４ｂの板厚をより薄くすることができる。
【００３７】
次に、図４の断面図を参照して本発明の第４実施例について具体的に説明する。本実施例においては、形材２の面板２ｂの外面に突起部３ａが相互に平行に延びるように形成されている。突起部３ａの頂部と中間部にはフランジ７が形成されており、突起部３ａは下方のフランジ７より下方の部分が、下方のフランジ７より上方の部分よりも幅広になっている。この上方及び下方のフランジ７の下面に多孔金属板４ｃがリベット８により固定されている。多孔金属板４ｃはその幅方向（突起部３ａ側）の両端部が折り返されて、各端部に２個の垂直折り曲げ部が形成されている。そして、多孔金属板４ｃはこの折り返された両端部を対向する突起部３ａ間のフランジ下部に嵌合し、フランジ７とその下面に重なる多孔金属板４ｃとをリベット８により接合して多孔金属板４ｃが突起部３ａに固定されている。
【００３８】
本実施例においては、突起部３ａの頂部のフランジ７が防音部材１の外面に突出するが、このフランジ７は薄いものであり、意匠性を損なうものではない。本実施例の多孔金属板４ｃはその両端部が折り返されているので、その強度が高いという利点がある。
【００３９】
次に、図５を参照して本発明の第５実施例について説明する。形材２の面板２ｂの外面には、図１に示す実施例と同様の突起部３が形成されている。外側の多孔金属板４ａは図２に示す実施例と同様に、防音部材１の全体を覆うか、又は複数個の突起部３にまたがって覆う大板である。しかし、内側の多孔金属板４ｄは突起部３の上半部の形状に倣って屈曲しており、この内側の多孔金属板４ｄの屈曲部を突起部３に嵌合し、更に外側の多孔金属板４ａを重ねた状態で、これらの多孔金属板４ｄ、４ａが同時にリベット８により突起部３の頂部に接合されている。
【００４０】
本実施例においては、リベットによる接合箇所が少なく、組み立て作業が容易であるという効果を奏する。
【００４１】
図６（ａ）は本発明の第６実施例を示す斜視図、図６（ｂ）は図６（ａ）のＢ−Ｂ線による断面図である。本実施例は、図５に示す実施例の外側多孔金属板４ａの代わりに、図３に示す実施例の凸部４０ｂを有する多孔金属板４ｂを使用したものである。図６において、図５と同一構成物には同一符号を付してその詳細な説明は省略する。本実施例の多孔金属板４ｂは、凸部４０ｂが突起部３ａ間に形成されており、リベット８により多孔金属板４ｂを突起部３ａに固定したものである。
【００４２】
本実施例においては、多孔金属板４ｂに凸部４０ｂが成形されているので、剛性が高く、多孔金属板４ｂの板厚を薄くすることができる。
【００４３】
図７（ａ）、（ｂ）は本発明の第７実施例を示す断面図である。本実施例は、図５に示す実施例に対し、形材２の面板部２ｂの外面に形成された突起部３ｂがその頂部に曲面のフランジ７ａを有し、内側の多孔金属板４ｅはこのフランジ７ａの曲面に倣う形状の凹凸を有する点が異なる。そして、内側の多孔金属板４ｅの凹凸を突起部３ｂのフランジ７ａに嵌合し、更に外側の大板の多孔金属板４ａをフランジ７ａ上に重ねた状態で、リベット８により多孔金属板４ａ、４ｅを同時に突起部３ｂのフランジ７ａに接合している。図７（ａ）に示す多孔金属板４ｅは、フランジ７ａに整合する位置における凸部が末広がりであり、図７（ｂ）に示す多孔金属板４ｅは、凸部が垂直に屈曲しているものである。
【００４４】
本実施例においても、図５に示す実施例と同様の効果を奏するのに加え、本実施例においては、突起部３ｂの頂部にフランジ７ａが形成されているので、リベット７を打ち込む位置に融通性があり、作業が容易である。
【００４５】
図８は本発明の第８実施例を示す断面図である。本実施例は、図５の実施例において、多孔金属板４ａ、４ｄをリベットではなく、ツール１０を使用して摩擦撹拌接合（ＦＳＷ）により突起部３に接合したものである。この場合に、先ず、内側の多孔金属板４ｄをＦＳＷツール１０により突起部３に摩擦撹拌接合した後、更に外側の多孔金属板４ａを突起部３上に重ね、再度、摩擦撹拌接合により、多孔金属板４ａを多孔金属板４ｄ及び突起部３に接合する（重ねＦＳＷ接合）。
【００４６】
多孔金属板４ａ、４ｄを２枚重ねた状態で突起部３に固定する場合、２枚同時に摩擦撹拌接合すると、多孔金属板４ａ、４ｄ間の界面が撹拌によって巻き込まれ、その方向によって継手強度が低下してしまう。そこで、継手強度を確保するために、２枚の多孔金属板を接合する場合は、１枚の多孔金属板毎に摩擦撹拌接合し、２回の摩擦撹拌接合により多孔金属板４ａ、４ｄを接合する必要がある。多孔金属板が３枚以上の場合も同様で、多孔金属板の枚数分の回数だけ、摩擦撹拌接合する必要がある。なお、形材２は、本実施例のように、面板２ａ、２ｂ間のリブ２ｄが面板２ａ、２ｂに対して垂直でもよい。
【００４７】
図９は本発明の第９実施例を示す断面図である。本実施例においては、形材２の面板部２ｂの外面に断面が長方形の突起部３ｃが形成されている。そして、内側の多孔金属板４ｆはこの突起部３ｃの形状に倣うように屈曲しており、多孔金属板４ｆは突起部３ｃの側面とスポット溶接１１により接合されている。また、大板の外側多孔金属板４ａが、突起部３ｃの頂部にて、摩擦撹拌接合又は機械的接合により内側多孔金属板４ｆに接合されている。なお、外側多孔金属板４ａは内側多孔金属板４ｆを突き抜けて突起部３ｃの頂部に至るように摩擦撹拌接合又は機械的接合により接合してもよい。
【００４８】
このように、リベット接合又は摩擦撹拌接合のみではなく、複数の接合方法を組み合わせても良く、スポット溶接、アーク溶接、レーザ溶接等の溶接方法を、摩擦撹拌接合又は機械的接合に組み合わせても良い。
【００４９】
図１０（ａ）は本発明の第１０実施例を示す断面図である。形材２の面板部２ｂの外面に、断面がＴ字状をなす突起部３ｄが形成されている。この突起部３ｄはその頂部に横方向に延びるフランジ７ｂが設けられている。本実施例は上述の各実施例の多孔金属板の代わりに、箱状の多孔金属成形体４ｇを使用する。この多孔金属成形体４ｇは多孔金属板を箱状に成形又は組み立てたものである。この多孔金属成形体４ｇは、対向する１対の突起部３ｄ間に配置され、突起部３ｄにおいて面板部２ｂとの間にスペーサ１３を介して、フランジ７ｂと面板部２ｂとの間に挟まれて焼き嵌めにより拘束されている。多孔金属成形体４ｇはスペーサ１３により面板部２ｂから適長間隔をおいて面板部２ｂに平行に配置されている。
【００５０】
なお、図１０（ｂ）に示すように、箱状の多孔金属成形体４ｇの両端部を折り返すことにより折り曲げ部４０ｇを形成し、この折り曲げ部４０ｇをスペーサ１３の代わりに使用しても良い。
【００５１】
また、多孔金属成形体４ｇの厚さとスペーサ１３の高さとの総和又は折り曲げ部４０ｇを有する多孔金属成形体４ｇの折り曲げ部４０ｇにおける全体の高さは、常温において、押出成形時の突起部３ｃのフランジ７ｂと面板部２ｂとの間の間隔よりも長い。そして、この形材２を高温に加熱した後、多孔金属成形体４ｇとスペーサ１３とをフランジ７ｂと面板部２ｂとの間に嵌め込み、形材２を常温に冷却する。これにより、多孔金属成形体４ｇが焼き嵌めにより突起部３ｄに拘束されて固定される。
【００５２】
なお、多孔金属成形体４ｇの代わりに、図３及び図６ｂに示すような凹みを成形した多孔金属成形体を使用して、これを焼き嵌めにより突起部３ｄ間に拘束固定することもできる。
【００５３】
図１１は本発明の第１１実施例を示す断面図である。本実施例は、図１０の実施例において、多孔金属成形体４ｇを焼き嵌めにより突起部３ｄ間に固定する代わりに、複数個の多孔金属成形体４ｇを表面板４０ｈの下面に適長間隔をおいて固定し、表面板４０ｈを突起部３ｄの頂部にリベット８により固定したものである。多孔金属成形体４ｇ間の間隔は、突起部３ｄの幅と同一であり、多孔金属成形体４ｇ間に形成される溝に突起部３ｄが嵌合している。表面板４０ｈは突起部３ｄの頂部に接触するように重ねられ、リベット８により突起部３ｄに直接接合されている。
【図面の簡単な説明】
【図１】本発明の第１実施例に係る防音部材を示す断面図である。
【図２】本発明の第２実施例に係る防音部材を示す断面図である。
【図３】（ａ）は本発明の第３実施例に係る防音部材を示す斜視図、（ｂ）は図３（ａ）のＡ−Ａ線による断面図である。
【図４】本発明の第４実施例に係る防音部材を示す断面図である。
【図５】本発明の第５実施例に係る防音部材を示す断面図である。
【図６】（ａ）は本発明の第６実施例に係る防音部材を示す斜視図、（ｂ）は図６（ａ）のＢ−Ｂ線による断面図である。
【図７】（ａ）本発明の第７実施例に係る防音部材を示す断面図、（ｂ）はその変形例である。
【図８】本発明の第８実施例に係る防音部材を示す断面図である。
【図９】本発明の第９実施例に係る防音部材を示す断面図である。
【図１０】（ａ）は本発明の第１０実施例に係る防音部材を示す断面図、（ｂ）はその変形例である。
【図１１】本発明の第１１実施例に係る防音部材を示す断面図である。
【符号の説明】
１：防音部材
２：形材
２ａ、２ｂ：面板部
２ｃ：リブ
３、３ａ、３ｂ、３ｃ、３ｄ：突起部
４、４ａ、４ｂ、４ｃ、４ｄ、４ｅ、４ｆ：多孔金属板
４ｇ：多孔金属成形体
５：溝
６：段差
７、７ａ、７ｂ：フランジ
８：リベット
９：当て板
１０：ＦＳＷツール
１１：スポット溶接
１２：摩擦撹拌接合又は機械的接合
１３：スペーサ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structural member of a railway vehicle (Shinkansen, subway, conventional line), a structural member of an automobile, a soundproof wall (Shinkansen, expressway, national highway), a sound absorbing plate for a road (back surface sound absorbing plate, digging horizontal sound absorbing plate, digging The present invention relates to a soundproof member used for a tunnel wall surface sound absorbing plate), and more particularly to a soundproof member made of an extruded aluminum material having sound absorbing properties.
[0002]
[Prior art]
For example, an aluminum extruded member in which zigzag ribs or partitions are provided between two parallel face plate portions is used as a structural member of a vehicle, particularly a surface member disposed on the surface. The weight of the structural member is reduced by using a material. However, since the aluminum profile easily transmits sound, it is necessary to take measures to reduce noise in order to improve the riding comfort of passengers or passengers.
[0003]
Therefore, conventionally, in the Shinkansen and automobiles, vibration damping materials are attached to the vehicle body against natural vibration noise, and noise countermeasures related to noise generated from the engine and road noise and rolling noise from the wheels, Sound absorbing materials are installed on the back of the floor, the inner surface of the skirt, and the inside of the engine, and the rigidity of the structural member is increased.
[0004]
On the other hand, for vehicles that run at high speed, such as the Shinkansen and automobiles, noise countermeasures against wind noise caused by high-speed airflow may be required. In that case, it is necessary to add soundproofing performance to a structural member on the vehicle surface (hereinafter also referred to as a surface member). For this purpose, it is conceivable that the sound absorbing material is attached to the surface of the surface member, or the surface member itself is made of a sound absorbing material. However, generally used sound absorbing materials are often flexible, and as a part of the surface member. The mechanical strength is insufficient.
[0005]
Therefore, as a noise countermeasure against wind noise, from the viewpoint of maintaining mechanical strength and preventing scattering of the sound absorbing material, for example, in the case of a wind speed of 60 to 90 km / s, the sound absorbing material is placed on the structural member of the vehicle from below. In order to prevent scattering of sound absorbing material and glass cloth due to high-speed airflow on a soundproof material in which glass cloth, metal scrap, and wire mesh are stacked, a soundproof member in which a porous metal plate having an aperture ratio of 20% or more is stacked. It is common to provide it. This perforated metal plate suppresses the soundproof material, so that the sound wave of noise reaches the sound absorbing material and the glass cloth without being reflected by the perforated metal plate, so that the aperture ratio is as high as 20% or more. ing.
[0006]
[Problems to be solved by the invention]
However, the conventional soundproofing member is obtained by stacking soundproofing materials in multiple layers, and it is necessary to use a plurality of materials having a high specific gravity, so that the mass becomes heavy and the durability is insufficient. Further, there are disadvantages that the surface smoothness is low and the design property is low. Furthermore, there is a drawback that the volume is increased and the manufacturing cost is increased.
[0007]
The present invention has been made in view of such problems, and is a soundproof member having high smoothness, excellent appearance, light weight and small size, high durability and mechanical strength, and low manufacturing cost. The purpose is to provide.
[0008]
[Means for Solving the Problems]
The soundproof member according to the present invention includes an aluminum or aluminum alloy extruded profile having a cross-sectional shape in which a rib is connected between a pair of parallel plane plates, and a line in the extrusion direction on the outer surface of one of the profile plates. A plurality of protrusions provided so as to extend in a shape, and a plurality of porous parallel metal plates fixed to the protrusions and formed with a plurality of through holes so as to be spaced from the one face plate part, It is characterized by having.
[0010]
In this case, the method for fixing the metal plate to the protrusion is preferably as follows.
[0011]
That is, in the first aspect of the present invention, a groove is formed on a side surface of the protrusion, and the metal plate is fitted and bonded to the groove of a pair of opposing protrusions. It is fixed to.
[0012]
According to a second aspect of the present invention, a flange portion extending in parallel with the surface of the one face plate portion is formed on the projection portion, and the metal plate is joined to the upper surface of the flange portion by a rivet. And fixed to the protrusion.
[0013]
In the invention which concerns on Claim 3, the flange part extended in parallel with the surface of said one face plate part is formed in the said projection part, The both ends of the said metal plate are return | folded, Both end portions are fitted into a gap between the flanges or between the flange and the face plate portion, and are joined to the lower surface of the flange by rivets and fixed to the protrusions.
[0014]
In the invention which concerns on Claim 4, the said projection part is a linear projection part formed mutually parallel so that it might extend in one direction on the outer surface of said one face plate part, and the said metal plate is said linear form. A rib is formed by bending so as to match the shape of the projection, and the metal plate is joined to the top of the projection by a rivet at the top of the rib and fixed to the projection.
[0015]
In the invention which concerns on Claim 5, while the said projection part is mutually formed in parallel so that it may extend in one direction on the outer surface of said one faceplate part, it is parallel to the said outer surface from the top part to the said projection part. An extending flange portion is formed, and the metal plate is curved so as to be aligned with the flange portion to form a curved surface portion, and the metal plate is a rivet on the flange portion of the projection portion at the curved surface portion. And fixed to the protrusion.
[0016]
In the invention according to any one of claims 2 to 5, when there are a plurality of the metal plates, the outermost metal plate is a flat plate and is joined to the top of the projection by a rivet, and the projection It can comprise so that it may be fixed to.
[0017]
In the invention which concerns on Claim 7, the said projection part is a linear projection part formed mutually parallel so that it might extend in one direction on the outer surface of said one face plate part, and the said metal plate is said linear form. A rib is formed by bending so as to match the shape of the protrusion, and the metal plate is joined to the top of the protrusion at the top of the rib by overlapping friction bonding and fixed to the protrusion.
[0018]
In the invention according to claim 8, the protrusions are formed in parallel to each other so as to extend in one direction on the outer surface of the one face plate portion, and the protrusions are parallel to the outer surface from the top. An extending flange portion is formed, the metal plate is curved so as to be aligned with the flange portion to form a curved surface portion, and the metal plate is overlapped with the flange portion of the projection portion at the curved surface portion. Joined by friction welding and fixed to the protrusion.
[0019]
In the invention according to claim 7 or 8, when there are a plurality of the metal plates, the outermost metal plate is a flat plate and is joined to the top of the protrusion by overlap friction bonding and fixed to the protrusion. Can be configured.
[0020]
In the invention which concerns on Claim 10, the rib which fits into the said projection part is formed in the said metal plate, The spot welding, arc welding, laser welding, lap | lamination are carried out to the said projection part at the rib of the said metal plate. The metal plate is fixed to the protruding portion by friction bonding or rivet bonding or spot welding, arc welding, laser welding, or lap friction bonding and rivet bonding.
[0021]
Another soundproof member according to the present invention includes an aluminum or aluminum alloy extruded shape having a cross-sectional shape in which a rib is connected between a pair of parallel face plates, and an extrusion direction on the outer surface of one face plate of the shape. A plurality of protrusions provided to extend linearly, and a porous metal molded body disposed between the protrusions so as to be spaced from the one face plate portion, the porous metal The compact is a corrugated porous metal plate formed with a plurality of through-holes or a box-shaped perforated metal plate formed with a plurality of through-holes, and has a shape higher than the operating temperature. The porous metal molded body is fitted between the protrusions, and the metal molded body is fixed to the protrusions by baking at a lowered operating temperature.
[0022]
Still another soundproofing member according to the present invention is an aluminum or aluminum alloy extruded profile having a structure in which a rib is connected between a pair of parallel plane plates, and is extruded to the outer surface of one of the profile plates. A plurality of protrusions provided to extend linearly in the direction, a surface plate that is superimposed on the protrusions and is fixed to the protrusions so as to connect the plurality of protrusions, and the surface plate A porous metal molded body fixed at a position between the projections on the surface on the shape member side, and the porous metal molded body is a corrugated porous metal plate formed with a plurality of through holes. Alternatively, a porous metal plate in which a plurality of through holes are formed is assembled in a box shape, and the protrusion is fitted in a groove formed between the porous metal molded bodies.
[0023]
In the present invention, the metal plate includes an alloy plate in addition to a single metal.
[0024]
In the present invention, the porous metal plate (or porous metal molded body) having a plurality of through-holes is disposed at a distance from the outer surface of the extruded shape made of aluminum or aluminum alloy, so the Helmholtz resonance principle and the viscous damping principle Therefore, it is possible to satisfactorily absorb noise in a frequency band around the resonance frequency and in a wide frequency range other than that, and to exhibit a soundproofing effect. Thereby, soundproofing can be added to the metal plate. Moreover, since this porous metal plate (or porous metal molded body) is located on the outermost surface, the surface is highly flat, and the porous metal plate (or porous metal molded body) is made of a metal or an alloy and thus has excellent durability. Yes.
[0025]
In the present invention, since the shape as the structural member is an extruded shape of aluminum or aluminum alloy, the weight can be reduced, and the weight can be further reduced by using an aluminum or aluminum alloy plate as the metal plate. can do.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a sectional view showing a soundproof member 1 according to a first embodiment of the present invention. The soundproofing member 1 has a shape member 2 and two porous metal plates 4 fixed to the shape member 2 with a space between the shape member 2. The cross section of the profile 2 has a structure in which a pair of face plate portions 2a and 2b are arranged in parallel, and ribs 2c inclined with respect to the face plate portions 2a and 2b are bridged between the face plate portions 2a and 2b. . And the protrusion part 3 is formed in the outer surface of one face-plate part 2b of this shape material 2 with an appropriate length space | interval. This shape member 2 is manufactured by extruding aluminum or an aluminum alloy.
[0027]
The projecting portion 3 of the profile 2 has a trapezoidal or rectangular cross section, and grooves 5 cut in parallel to the outer surface of the face plate portion 2b are formed on both side surfaces at approximately half the height direction. Is formed. A step 6 is formed at the upper end of the protrusion 3. In addition, since the shape material 2 including the projection part 3 is shape | molded by extrusion molding, the projection part 3 is extended in the direction perpendicular | vertical to the paper surface of FIG. 1, and is a linear projection part.
[0028]
The two porous metal plates 4 are spaced between the projections 3 with respect to the face plate portion 2b, and are arranged in parallel to the face plate portion 2b so as to be spaced from each other. The porous metal plate 4 is fitted and fixed in the grooves 5 of the pair of protruding portions 3 facing each other, and the outer porous metal plate 4 is joined to the step 6 of the pair of protruding portions 3 facing each other by an adhesive. It is fixed. The inner porous metal plate 4 may be fitted into the groove 5 and may be fixed to the protrusion 3 using an adhesive.
[0029]
The perforated metal plate 4 is formed by drilling a large number of through holes in a metal plate, and can be manufactured from aluminum, an aluminum alloy plate, a steel plate, or the like. In view of recyclability, the porous metal plate 4 is preferably made of the same kind of material as aluminum or aluminum alloy. Further, by using an aluminum or aluminum alloy plate as the porous metal plate 4, the soundproofing member 1 can be further reduced in weight in combination with the shape 2 being an extruded shape of aluminum or aluminum alloy.
[0030]
In the soundproofing member configured in this way, since the two porous metal plates 4 are arranged at an appropriate distance from the face plate portion 2b of the profile member 2, the resonance frequency surroundings are determined by the Helmholtz resonance principle and the viscous damping principle. Noise in a frequency band and a wide frequency range other than that can be satisfactorily absorbed to exhibit a soundproofing effect. In the present embodiment, the surface of the outer porous metal plate 4 and the upper end surface of the protrusion 3 are substantially flush, and when the soundproof member 1 is used as a vehicle surface member, its outer surface is There is no unevenness and it is flat and excellent in design.
[0031]
In the production process of the soundproof member 1, a thermosetting resin is used as an adhesive, and the thermosetting resin is simultaneously cured when the shape member 2 is inserted into the annealing furnace and annealed. By doing so, the process can be shortened.
[0032]
Next, a second embodiment of the present invention will be described with reference to FIG. 2, the same components as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted. On the outer surface of the profile 2, a plurality of protrusions 3 a are formed at appropriate intervals. The protrusions 3a are erected perpendicularly to the face plate portion 2b, and extend linearly parallel to each other on the surface of the face plate portion 2b.
[0033]
The projecting portion 3a is formed with a flange 7 extending in the lateral direction at an intermediate portion thereof, and the inner porous metal plate 4 has a width corresponding to the interval between the projecting portions 3a facing each other. The both end portions are overlapped on the upper surface of the flange 7 at each intermediate portion of the projecting portion 2 a facing each other, and are joined and fixed to the flange 7 by rivets 8. The outer porous metal plate 4a is a single large plate that covers the entire soundproofing member 1, and is joined and fixed to the upper end of each projection 3a by a rivet 8.
[0034]
In the present embodiment, the porous metal plates 4 and 4a and the protrusion 3a are joined by the rivet 8, but the same effects as in the first embodiment shown in FIG. The outer porous metal plate 4a can also be divided at each protrusion 3a. However, the strength of the soundproofing member 1 can be increased by making the outer porous metal plate 4 a a large plate that covers the entire soundproofing member 1 as in this embodiment, and the outer surface of the soundproofing member 1 can be increased. Becomes completely flat, and the design is extremely excellent.
[0035]
FIG. 3A is a perspective view showing a third embodiment of the present invention, and FIG. 3B is a cross-sectional view taken along line AA of FIG. 3A and 3B, the same components as those in FIG. 2 are denoted by the same reference numerals, and detailed description thereof is omitted. In this embodiment, instead of the porous metal plate 4a on the outside of the second embodiment shown in FIG. 2, a porous metal plate 4b in which rectangular convex portions 40b are provided between the protruding portions 3a is used. The convex portion 40b extends in the longitudinal direction of the protruding portion 3a in plan view, and has a rectangular island shape.
[0036]
In the present embodiment, since the convex portions 40b are formed on the porous metal plate 4b, the rigidity is high, and the thickness of the porous metal plate 4b can be further reduced.
[0037]
Next, the fourth embodiment of the present invention will be described in detail with reference to the sectional view of FIG. In the present embodiment, the protrusions 3a are formed on the outer surface of the face plate 2b of the profile 2 so as to extend in parallel to each other. A flange 7 is formed at the top and middle of the protrusion 3 a, and the protrusion 3 a is wider at the part below the lower flange 7 than at the part above the lower flange 7. A porous metal plate 4 c is fixed to the lower surface of the upper and lower flanges 7 by rivets 8. Both ends of the porous metal plate 4c in the width direction (projection 3a side) are folded, and two vertical bent portions are formed at each end. The perforated metal plate 4c is fitted into the lower flange portion between the projecting portions 3a facing each other, and the flange 7 and the perforated metal plate 4c overlapping the lower surface thereof are joined by the rivet 8 to join the perforated metal plate. 4c is fixed to the protrusion 3a.
[0038]
In this embodiment, the flange 7 at the top of the protrusion 3a protrudes from the outer surface of the soundproofing member 1, but this flange 7 is thin and does not impair the design. Since both ends of the porous metal plate 4c of the present embodiment are folded, there is an advantage that the strength is high.
[0039]
Next, a fifth embodiment of the present invention will be described with reference to FIG. On the outer surface of the face plate 2b of the profile 2 is formed a protrusion 3 similar to the embodiment shown in FIG. The outer porous metal plate 4a is a large plate that covers the entire soundproofing member 1 or covers the plurality of protrusions 3 as in the embodiment shown in FIG. However, the inner porous metal plate 4d is bent in accordance with the shape of the upper half of the protruding portion 3. The bent portion of the inner porous metal plate 4d is fitted into the protruding portion 3, and the outer porous metal plate is further bent. These porous metal plates 4 d and 4 a are simultaneously joined to the top of the protrusion 3 by rivets 8 in a state where the plates 4 a are stacked.
[0040]
In this embodiment, there are few joints by rivets, and the assembly work is easy.
[0041]
FIG. 6A is a perspective view showing a sixth embodiment of the present invention, and FIG. 6B is a cross-sectional view taken along the line BB of FIG. 6A. In this embodiment, the porous metal plate 4b having the convex portions 40b of the embodiment shown in FIG. 3 is used instead of the outer porous metal plate 4a of the embodiment shown in FIG. In FIG. 6, the same components as those in FIG. 5 are denoted by the same reference numerals, and detailed description thereof is omitted. In the porous metal plate 4b of this embodiment, convex portions 40b are formed between the protruding portions 3a, and the porous metal plate 4b is fixed to the protruding portions 3a by rivets 8.
[0042]
In the present embodiment, since the convex portion 40b is formed on the porous metal plate 4b, the rigidity is high and the thickness of the porous metal plate 4b can be reduced.
[0043]
7A and 7B are cross-sectional views showing a seventh embodiment of the present invention. This embodiment is different from the embodiment shown in FIG. 5 in that the projection 3b formed on the outer surface of the face plate portion 2b of the profile 2 has a curved flange 7a on the top, and the inner porous metal plate 4e is The point which has the unevenness | corrugation of the shape which follows the curved surface of the flange 7a differs. Then, in the state where the unevenness of the inner porous metal plate 4e is fitted to the flange 7a of the projection 3b and the outer large porous metal plate 4a is superimposed on the flange 7a, the porous metal plate 4a, 4e is simultaneously joined to the flange 7a of the protrusion 3b. In the porous metal plate 4e shown in FIG. 7 (a), the convex portion at the position aligned with the flange 7a is divergent, and in the porous metal plate 4e shown in FIG. 7 (b), the convex portion is bent vertically. It is.
[0044]
In this embodiment, in addition to the same effects as the embodiment shown in FIG. 5, in this embodiment, the flange 7a is formed on the top of the projection 3b, so that the rivet 7 can be driven into the position. And work is easy.
[0045]
FIG. 8 is a sectional view showing an eighth embodiment of the present invention. In this embodiment, the porous metal plates 4a and 4d are joined to the protrusion 3 by friction stir welding (FSW) using the tool 10 instead of the rivet in the embodiment of FIG. In this case, first, the inner porous metal plate 4d is friction stir welded to the protruding portion 3 by the FSW tool 10, and the outer porous metal plate 4a is further stacked on the protruding portion 3, and again by friction stir welding. The metal plate 4a is joined to the porous metal plate 4d and the protrusion 3 (overlapping FSW joining).
[0046]
When fixing the two porous metal plates 4a and 4d to the protrusion 3 in a state where they are stacked, if two sheets are simultaneously friction stir welded, the interface between the porous metal plates 4a and 4d is caught by stirring, and the joint strength depends on the direction. It will decline. Therefore, in order to secure the joint strength, when two porous metal plates are joined, friction stir welding is performed for each porous metal plate, and the porous metal plates 4a and 4d are joined by two friction stir weldings. There is a need to. The same applies when there are three or more porous metal plates, and it is necessary to perform friction stir welding as many times as the number of porous metal plates. In the profile 2, the rib 2d between the face plates 2a and 2b may be perpendicular to the face plates 2a and 2b, as in the present embodiment.
[0047]
FIG. 9 is a sectional view showing a ninth embodiment of the present invention. In this embodiment, a protrusion 3c having a rectangular cross section is formed on the outer surface of the face plate 2b of the profile 2. The inner porous metal plate 4f is bent so as to follow the shape of the projection 3c, and the porous metal plate 4f is joined to the side surface of the projection 3c by spot welding 11. Further, a large outer porous metal plate 4a is joined to the inner porous metal plate 4f by friction stir welding or mechanical joining at the top of the protrusion 3c. The outer porous metal plate 4a may be joined by friction stir welding or mechanical joining so as to penetrate the inner porous metal plate 4f and reach the top of the protrusion 3c.
[0048]
Thus, not only rivet joining or friction stir welding, but also a plurality of joining methods may be combined, and welding methods such as spot welding, arc welding, and laser welding may be combined with friction stir welding or mechanical joining. .
[0049]
FIG. 10A is a sectional view showing a tenth embodiment of the present invention. A protrusion 3d having a T-shaped cross section is formed on the outer surface of the face plate 2b of the profile 2. The protrusion 3d is provided with a flange 7b extending in the lateral direction at the top. In this embodiment, a box-shaped porous metal molded body 4g is used instead of the porous metal plate of each of the above-described embodiments. This porous metal molded body 4g is formed by assembling or assembling a porous metal plate into a box shape. The porous metal molded body 4g is disposed between a pair of opposing protruding portions 3d, and is sandwiched between the flange 7b and the face plate portion 2b via the spacer 13 between the protruding portion 3d and the face plate portion 2b. It is restrained by shrink fitting. The porous metal molded body 4g is arranged in parallel to the face plate portion 2b at an appropriate distance from the face plate portion 2b by the spacer 13.
[0050]
10B, the bent portion 40g may be formed by folding both ends of the box-shaped porous metal molded body 4g, and the bent portion 40g may be used instead of the spacer 13.
[0051]
The total height of the bent metal portion 4g having the bent portion 40g or the sum of the thickness of the porous metal formed body 4g and the spacer 13 is equal to that of the protrusion 3c at the time of extrusion molding at room temperature. It is longer than the interval between the flange 7b and the face plate portion 2b. Then, after heating the profile 2 to a high temperature, the porous metal molded body 4g and the spacer 13 are fitted between the flange 7b and the face plate portion 2b, and the profile 2 is cooled to room temperature. Thereby, the porous metal molded body 4g is restrained and fixed to the protrusion 3d by shrink fitting.
[0052]
In addition, instead of the porous metal molded body 4g, a porous metal molded body formed with a recess as shown in FIGS. 3 and 6b can be used, and this can be restrained and fixed between the protrusions 3d by shrink fitting.
[0053]
FIG. 11 is a sectional view showing an eleventh embodiment of the present invention. In the present embodiment, instead of fixing the porous metal molded body 4g between the protrusions 3d by shrink fitting in the embodiment of FIG. 10, a plurality of porous metal molded bodies 4g are placed at appropriate intervals on the lower surface of the surface plate 40h. The surface plate 40h is fixed to the top of the projection 3d by a rivet 8. The interval between the porous metal molded bodies 4g is the same as the width of the protruding portions 3d, and the protruding portions 3d are fitted in the grooves formed between the porous metal molded bodies 4g. The surface plate 40h is stacked so as to be in contact with the top of the protrusion 3d, and is directly joined to the protrusion 3d by the rivet 8.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a soundproof member according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view showing a soundproof member according to a second embodiment of the present invention.
3A is a perspective view showing a soundproof member according to a third embodiment of the present invention, and FIG. 3B is a cross-sectional view taken along line AA of FIG. 3A.
FIG. 4 is a cross-sectional view showing a soundproof member according to a fourth embodiment of the present invention.
FIG. 5 is a sectional view showing a soundproofing member according to a fifth embodiment of the present invention.
6A is a perspective view showing a soundproof member according to a sixth embodiment of the present invention, and FIG. 6B is a cross-sectional view taken along line BB of FIG. 6A.
7A is a sectional view showing a soundproofing member according to a seventh embodiment of the present invention, and FIG. 7B is a modified example thereof.
FIG. 8 is a sectional view showing a soundproofing member according to an eighth embodiment of the present invention.
FIG. 9 is a sectional view showing a soundproofing member according to a ninth embodiment of the present invention.
10A is a cross-sectional view showing a soundproof member according to a tenth embodiment of the present invention, and FIG. 10B is a modified example thereof.
FIG. 11 is a sectional view showing a soundproofing member according to an eleventh embodiment of the present invention.
[Explanation of symbols]
1: Soundproof member 2: Profile 2a, 2b: Face plate 2c: Ribs 3, 3a, 3b, 3c, 3d: Protrusions 4, 4a, 4b, 4c, 4d, 4e, 4f: Porous metal plate 4g: Porous metal Molded body 5: groove 6: steps 7, 7a, 7b: flange 8: rivet 9: backing plate 10: FSW tool 11: spot welding 12: friction stir welding or mechanical joining 13: spacer

Claims

An aluminum or aluminum alloy extruded profile having a cross-sectional shape in which a rib is connected between a pair of parallel plane plates, and an outer surface of one of the profile plates is provided to extend linearly in the extrusion direction . A plurality of projecting portions, and a plurality of parallel parallel metal plates fixed to the projecting portion and formed with a plurality of through holes so as to be spaced from the one face plate portion, One or a plurality of grooves are formed on the side surface, and at least a part of the metal plate is fitted and bonded to the grooves of a pair of protrusions facing each other and fixed to the protrusions. A soundproofing member characterized by the above.

An aluminum or aluminum alloy extruded profile having a cross-sectional shape in which a rib is connected between a pair of parallel plane plates, and an outer surface of one of the profile plates is provided to extend linearly in the extrusion direction . A plurality of protrusions and a plurality of parallel parallel metal plates fixed to the protrusions and formed with a plurality of through holes so as to be spaced from the one face plate part; Has a flange portion extending in parallel to the surface of the one face plate portion, and at least a part of the metal plate is joined to the upper surface of the flange portion by a rivet and fixed to the projection portion. A soundproofing member, characterized in that

An aluminum or aluminum alloy extruded profile having a cross-sectional shape in which a rib is connected between a pair of parallel plane plates, and an outer surface of one of the profile plates is provided to extend linearly in the extrusion direction . A plurality of protrusions and a plurality of parallel parallel metal plates fixed to the protrusions and formed with a plurality of through holes so as to be spaced from the one face plate part; Has a flange portion extending in parallel to the surface of the one face plate portion, and at least a part of both end portions of the metal plate are folded back, and a pair of protrusions facing both end portions. A soundproofing member characterized by being fitted in a gap between the flanges of a part or between the flange and the face plate part, joined to the lower surface of the flange by a rivet and fixed to the projection part.

An aluminum or aluminum alloy extruded profile having a cross-sectional shape in which a rib is connected between a pair of parallel plane plates, and an outer surface of one of the profile plates is provided to extend linearly in the extrusion direction . A plurality of protrusions, and a plurality of parallel parallel metal plates fixed to the protrusions and formed with a plurality of through holes so as to be spaced from the one face plate part, the protrusions being , Linear protrusions formed in parallel to each other so as to extend in one direction on the outer surface of the one face plate part, and at least a part of the metal plate matches the shape of the linear protrusion part. A soundproof member, wherein a rib is formed by bending, and the metal plate is joined to the top of the protrusion by a rivet at the top of the rib and fixed to the protrusion.

An aluminum or aluminum alloy extruded profile having a cross-sectional shape in which a rib is connected between a pair of parallel plane plates, and an outer surface of one of the profile plates is provided to extend linearly in the extrusion direction . A plurality of protrusions, and a plurality of parallel parallel metal plates fixed to the protrusions and formed with a plurality of through holes so as to be spaced from the one face plate part, the protrusions being The outer surface of the one face plate portion is formed in parallel with each other so as to extend in one direction, and the projecting portion is formed with a flange portion extending in parallel to the outer surface from the top portion, and the metal The plate is curved so that at least a part of the plate is aligned with the flange portion to form a curved surface portion, and the metal plate is joined to the flange portion of the projection portion by a rivet at the curved surface portion to the projection portion. Be fixed Soundproof member according to symptoms.

6. The outermost metal plate of the plurality of metal plates is a flat plate and is joined to the top of the projection by a rivet and fixed to the projection. The soundproof member according to Item.

An aluminum or aluminum alloy extruded profile having a cross-sectional shape in which a rib is connected between a pair of parallel plane plates, and an outer surface of one of the profile plates is provided to extend linearly in the extrusion direction . A plurality of protrusions, and a plurality of parallel parallel metal plates fixed to the protrusions and formed with a plurality of through holes so as to be spaced from the one face plate part, the protrusions being , Linear protrusions formed in parallel to each other so as to extend in one direction on the outer surface of the one face plate part, and at least a part of the metal plate matches the shape of the linear protrusion part. A soundproofing member, wherein a rib is formed by bending the metal plate, and the metal plate is joined to the top of the protrusion at the top of the rib by overlap friction bonding and fixed to the protrusion.

An aluminum or aluminum alloy extruded profile having a cross-sectional shape in which a rib is connected between a pair of parallel plane plates, and an outer surface of one of the profile plates is provided to extend linearly in the extrusion direction . A plurality of protrusions, and a plurality of parallel parallel metal plates fixed to the protrusions and formed with a plurality of through holes so as to be spaced from the one face plate part, the protrusions being The outer surface of the one face plate portion is formed in parallel with each other so as to extend in one direction, and the projecting portion is formed with a flange portion extending in parallel to the outer surface from the top portion, and the metal The plate is curved so that at least a part thereof is aligned with the flange portion to form a curved surface portion, and the metal plate is joined to the flange portion of the projection portion by overlap friction bonding at the curved surface portion and the projection Fixed to Soundproof member, wherein.

The outermost metal plate of the plurality of metal plates is a flat plate and is joined to the top of the projection by overlap friction bonding and fixed to the projection. Soundproof member.

An aluminum or aluminum alloy extruded profile having a cross-sectional shape in which a rib is connected between a pair of parallel plane plates, and an outer surface of one of the profile plates is provided to extend linearly in the extrusion direction . A plurality of protrusions and a plurality of parallel metal plates that are fixed to the protrusions so as to be spaced from the one face plate portion and that are formed with a plurality of through holes. Are formed with ribs that fit into the projections, and the ribs of the metal plate are spot welded, arc welded, laser welded, lap friction joined or rivet joined or spot welded, arc welded, laser A soundproofing member characterized in that the metal plate is fixed to the protrusion by being joined by welding or lap friction joining and rivet joining.

An aluminum or aluminum alloy extruded profile having a cross-sectional shape in which a rib is connected between a pair of parallel plane plates, and an outer surface of one of the profile plates is provided to extend linearly in the extrusion direction . It has a plurality of protrusions, and a porous metal formed body arranged therebetween of the protrusions so spaced from said one surface plate portion, the porous metal compacts through hole of multiple formation The perforated metal plate is assembled in a box shape, and the metal porous body is fitted between the protrusions of the shape member having a temperature higher than the use temperature, and the metal is obtained by baking at the lowered use temperature. A soundproof member, wherein the molded body is fixed to the protrusion.

An aluminum or aluminum alloy extruded profile having a cross-sectional shape in which a rib is connected between a pair of parallel plane plates, and an outer surface of one of the profile plates is provided to extend linearly in the extrusion direction . A plurality of protrusions, a surface plate overlaid on the protrusions so as to connect the plurality of protrusions and fixed to the protrusions, and the protrusions on the surface of the surface plate on the shape member side and a porous metal formed body fixed to a position between the porous metal compacts are those assembled into a box-shaped porous metal plate through hole of the multiple is formed, the protrusion is the porous A soundproofing member characterized by being fitted in a groove formed between metal molded bodies.