JP4452771B2

JP4452771B2 - Sound barrier insulation for sound barrier

Info

Publication number: JP4452771B2
Application number: JP2000388177A
Authority: JP
Inventors: 忠彦中西
Original assignee: 新中央工業株式会社
Priority date: 2000-12-21
Filing date: 2000-12-21
Publication date: 2010-04-21
Anticipated expiration: 2020-12-21
Also published as: JP2002188124A

Description

【０００１】
【発明の属する技術分野】
本発明は、防音壁において遮音板を固定するための板バネ式の遮音板留め金具に関する。
【０００２】
【従来の技術】
一般に、自動車道路の両側等に設けられる防音壁は、例えば実開平４−５７５１３号公報に示されているように、所定間隔をあけて立設された複数の支柱と、該相隣接する一対の支柱の対向面に形成され、該支柱の長さ方向に延びる断面コ字状溝と、該相対向する断面コ字状溝間に嵌め込まれ、該断面コ字状溝の溝幅よりも厚みが小さく設定された遮音板とを備えている。そして、上記遮音板と断面コ字状溝における一方の側面との隙間（溝幅方向の隙間）には板バネ式の遮音板留め金具が装着され、この留め金具の弾性復元力により遮音板が断面コ字状溝の他方の側面に押圧されて固定されるようになっている。
【０００３】
上記留め金具は、基本的には、略上下方向に延び、上記隙間に装着されたときに、厚み方向の一方の面が上記遮音板の厚み方向における該隙間側の面に当接する第１縦辺部と、この第１縦辺部と対向しかつ該第１縦辺部との水平距離が上側に向かって大きくなるように設けられ、留め金具が上記隙間に装着されたときに、厚み方向における第１縦辺部と反対側面の上端部が上記断面コ字状溝の一方の側面に当接する第２縦辺部とを備えている。上記第１縦辺部及び第２縦辺部の下端部同士は、例えば上記公報のように連結辺部を介して接続されるか、又は、例えば実開昭６１−５０１０９号公報に示されているように、連結辺部を介さずに直接接続されている。
【０００４】
そして、上記第１縦辺部及び第２縦辺部の下端部間の水平距離は、上記隙間よりも小さく設定されている一方、上端部間の水平距離は、上記隙間よりも大きく設定されており、留め金具を上記遮音板と断面コ字状溝との隙間に装着するには、先ず、第１縦辺部及び第２縦辺部の下端部をその隙間に挿入しておき、この留め金具を上側からハンマー等で叩くことにより第１縦辺部及び第２縦辺部の上端部を互いに近付く方向に撓ませて上記隙間に完全に挿入させる。
【０００５】
しかし、上記従来の留め金具の装着方法では、留め金具を重いハンマーで叩いて装着しなければならないため、装着作業に時間がかかると共に、力の弱い作業者に装着作業を行わせることはできないという問題がある。また、装着作業時に大きな音が発生すると共に、留め金具が破損する場合がある。
【０００６】
この不具合対策として、特開平１０−２４５８２１号公報のものが知られている。このものでは、略上下方向に延び、上記隙間に装着されたときに、厚み方向の一方の面が上記遮音板の厚み方向における該隙間側の面に当接する第１縦辺部と、上記第１縦辺部と対向しかつ該第１縦辺部との水平距離が上側に向かって大きくなるように略上下方向に延び、下端部が上記第１縦辺部の下端部に接続され、上記隙間に装着されたときに、厚み方向における第１縦辺部と反対側面の上端部が上記断面コ字状溝の一方の側面に当接する第２縦辺部と、上記第１縦辺部と第２の縦辺部とを係合する係合手段とを備え、上記係合手段により第１縦辺部及び第２縦辺部同士が係合されているときに、該第１縦辺部及び第２縦辺部の上端部間の水平距離が非係合時よりも小さくなるように構成されているものが開示されている。
【０００７】
上記公報の留め金具では、第１縦辺部と第２縦辺部とを圧縮状態で保持する圧縮状態保持機構を備えている。この圧縮状態保持機構により、留め金具は金槌等で強制的に叩かなくても、断面コ字状溝と防音壁の隙間に挿入できる。そして、圧縮状態の解除時には弾性力の復元、上記隙間を弾性的に保持できるようになっている。
【０００８】
【発明が解決しようとする課題】
しかし、留め金具がフリーな状態でＶ字状であるものでは、第１縦辺部１１２と第２縦辺部１１３の上端部同士を係合手段２００で接近させて圧縮状態にすると、図１１に示すように、中膨れの太鼓状になる。
【０００９】
この状態から圧縮状態を解除すると、第１縦辺部と第２縦辺部の上端部同士は復元弾性力により互いに離れる方向に開くが、元のＶ字形状に復元しないことがある。
この点を研究した結果、元々断面コ字状溝と防音壁の隙間が小さいものでは、挿入時の留め金具の中膨れ部分と上記隙間との間隔が非常に狭いために、圧縮状態を解除した場合に、第１縦辺部及び第２縦辺部の上端部が断面コ字状溝と防音壁に当接する前に、留め金具の中膨れ部分が断面コ字状溝と防音壁に当接してしまうことが判明した。この状態では、第１縦辺部と第２縦辺部の下端部と中膨れ部分との長さでのＶ時状で復元弾性力が作用し、第１縦辺部及び第２縦辺部の上端部の復元力が作用しないために、弾性保持力が不足する結果となっている。
【００１０】
即ち、従来技術のように、フリーな状態で、上記第１縦辺部及び第２縦辺部とが略Ｖ字状になって形成され、係合手段による係合時、上記第１縦辺部及び第２縦辺部とが大きな中膨らみ形状（太鼓形状）に形成されていると、隙間に挿入して係合を外したときに、上記第１縦辺部及び第２縦辺部の上下中間部分（太鼓形状の中膨らみ部分）が先に遮音板及び断面コ字状溝の側面に当接することとなり、上記第１縦辺部及び第２縦辺部の上端部は当接しないか当接しても触れているだけ（弾性復元力が作用しない状態）ということになる。その結果、遮音板留め金具の弾性復元力は、上記第１縦辺部及び第２縦辺部の太鼓形状の中膨らみ部分の復元力によって決まり、バネ作用が弱いものになってしまう。
【００１１】
特に、留め金具の第１縦辺部と第２縦辺部とを所定の隙間に挿入して係合を解除した場合に、第１縦辺部と第２縦辺部の角度が１５°以下になるような狭い隙間のような場合には、圧縮状態を解除したときに、留め金具の中膨れ部分が先に断面コ字状溝と防音壁に当接する結果となった。
【００１２】
本発明は斯かる点に鑑みてなされたものであり、その目的とするところは、上記のような防音壁の遮音板留め金具に対して、その構成を改良することによって、遮音板と断面コ字状溝との隙間に装着する留め金具の弾性復元力が、十分に作用するようにすることにある。特に、圧縮状態を解除した場合に、第１縦辺部と第２縦辺部の上端部分が断面コ字状溝と防音壁に当接して、この部分の弾性復元力が作用するようにしたものである。
【００１３】
上記の目的を達成するために、請求項１の発明は、所定間隔をあけて立設された一対の支柱の対向面に該支柱の長さ方向に延びて形成された断面コ字状溝と、相対向する断面コ字状溝間に該断面コ字状溝の溝幅よりも厚みが小さく設定されて嵌め込まれた遮音板との隙間に装着され、弾性復元力により該遮音板を断面コ字状溝の他方の側面に押圧する板バネ式の遮音板留め金具であって、略上下方向に延び、上記隙間に装着されたときに、厚み方向の一方の面が上記遮音板の厚み方向における該隙間側の面に当接する第１縦辺部と、上記第１縦辺部と対向しかつ該第１縦辺部との水平距離が上側に向かって大きくなるように略上下方向に延び、下端部が上記第１縦辺部の下端部に接続され、上記隙間に装着されたときに、厚み方向における第１縦辺部と反対側面の上端部が上記断面コ字状溝の一方の側面に当接する第２縦辺部と、上記第１縦辺部と第２縦辺部とを係合する係合手段とを備え、該第１縦辺部及び第２縦辺部は、それぞれ所定の曲率で互いに反る方向に湾曲して形成され、上記係合手段により第１縦辺部及び第２縦辺部同士が係合されているときに、該第１縦辺部及び第２縦辺部の上端部間の水平距離が非係合時よりも小さくなるように構成されていることを特徴とする構成である。
【００１４】
上記の構成により、係合部と第２縦辺部の上端部との係合時に、第１縦辺部及び第２縦辺部の上端部間の水平距離を、遮音板と断面コ字状溝における一方の側面との隙間量と略同じになるようにするか又はその隙間量よりも小さくなるようにすることができる。この結果、作業者は、予め係合部と第２の縦辺部の上端部とを係合した留め金具をその隙間に挿入して上記係合を解除するだけで済み、力の弱い作業者であっても留め金具を簡単な作業で容易にかつスムーズに装着することができると共に、その装着作業時に大きな音が発生したり、留め金具が壊れたりするのを防止することができる。そして、係合を外した場合に、第１縦辺部及び第２縦辺部の上端部が確実に遮音板と断面コ字状溝における一方の側面とに当接するので、第１縦辺部及び第２縦辺部の上下方向長さをフルに利用した第１縦辺部及び第２縦辺部の弾性復元力により、遮音板を断面コ字状溝に強固に弾性保持できる。
【００１５】
請求項２の発明では、請求項１記載の防音壁の遮音板留め金具において、該第１縦辺部及び第２縦辺部は、第１縦辺部と第２縦辺部とを所定の隙間に挿入して係合を解除した場合に、第１縦辺部と第２縦辺部の角度が１５°以下になる構成であり、係合を外した場合に、第１縦辺部及び第２縦辺部の上端部が確実に遮音板と断面コ字状溝における一方の側面とに当接し、第１縦辺部及び第２縦辺部の上下方向全長の弾性復元力が作用するので、遮音板を断面コ字状溝に強固に弾性保持することができる。
【００１６】
請求項３の発明では、請求項１又は２記載の防音壁の遮音板留め金具において、上記係合手段が第１縦辺部の上端部に設けられ、上記第２縦辺部の上端部に対して係脱自在な係合部とを備える構成であり、簡単な構成で係合部を形成することができる。また、係合部を第１の縦辺部に一体形成することができ、低コストで係合部を形成することができる。
【００１７】
請求項４の発明では、請求項１ないし３のいずれか記載の防音壁の遮音板留め金具において、上記係合手段が第１縦辺部及び第２縦辺部のいずれか一方に形成された片持ちはり状の可撓部と、他方に形成されかつ該可撓部と係合する係合受部とからなる構成であり、簡単な構成で係合部を形成でき、低コストで係合部を形成することができる。その上、楽な作業で留め金具を設置でき、かつ簡単に係合を解除できる構成であり、作業者への負担を極めて軽減できる。
【００１８】
請求項５の発明では、請求項１ないし４のいずれか記載の防音壁の遮音板留め金具において、上記係合手段は、基端部が第１縦辺部に接続されかつ該基端部から上側に延びて先端部が第１縦辺部の厚み方向に撓むことが可能な片持張り状の可撓部と、該可撓部の両側部が第２縦辺部側に突出するように略直角に折り曲げて形成されかつ第２縦辺部の上端部に対して上側を覆うように係合する突起部とからなる構成であり、上記突起部と第２縦辺部の上端部との係合が確実であり、かつ係合状態を安定維持して得られる。
【００１９】
請求項６の発明では、請求項５記載の防音壁の遮音板留め金具において、上記係合手段は略凸形状から形成されており、略凸形状の基端部が第１縦辺部の上端部に接続され、第１縦辺部の厚み方向に撓むことが可能な片持張り状になっており、略凸形状の両端部がお互いに平行になるように略直角に折り曲げられて第２縦辺部側に突出するように形成され、かつ第２縦辺部の上端部に対して上側を覆うように係合する突起部として設けられ、略凸形状の先端部に略上下方向に延びて且つ第２縦辺部の方向に傾斜して形成された延設部が備えられているので、この延設部をガイドにして該延設部と第２縦辺部との間にドライバー等の工具を差し込むことができ、該工具を差し込んだ状態で回したりこじたりすることにより、係合部と第２縦辺部との係合を容易に解除することができる。
【００２０】
請求項７の発明は、請求項５又は６記載の防音壁の遮音板留め金具において、上記第２縦辺部の上端部には、該上端部から上記第１縦辺部側でかつ下側に延びる斜辺部１４が接続され、上記突起部の下面は上記斜辺部ないし第２縦辺部の上端部に沿う円弧状をなして形成されている構成であり、上記突起部と第２縦辺部の上端部との係合が確実であり、かつ係合状態を安定維持して得られるとともに、解除作業もスムーズに行うことができる。
【００２１】
【発明の実施の形態】
図１及び図２は、本発明の実施形態１に係る遮音板留め金具１０が設けられた防音壁１を示し、この防音壁１は、自動車道路の両側において該自動車道路に沿った方向（図１の紙面に垂直な方向）に所定間隔をあけて立設された多数の支柱２，２，…を備えている。この各支柱２の上部は、自動車道路側に向けて円弧状に湾曲されている。上記各支柱２は、Ｈ形鋼からなっていて、該支柱２の長さ方向に延びる２つの断面コ字状溝３，３を有し、この各断面コ字状溝３の開口が自動車道路に沿った方向（防音壁１の長さ方向）を向くように立設されている。すなわち、各断面コ字状溝３は、相隣接する一対の支柱２，２の対向面に形成されていることになる。
【００２２】
上記一対の支柱２，２の対向面における相対向する断面コ字状溝３，３間には、自動車道路に沿った方向に延びる複数の遮音板４，４，…が上下方向に積み重ねられた状態で嵌め込まれている。この各遮音板４は、ポリカーボネート等のプラスチック製や、鉄及びアルミニウムからなるボックスタイプ製であり、その厚みｔは上記断面コ字状溝３の溝幅Ｗよりも小さく設定されている。尚、図１及び図２中、５は、各支柱２の自動車道路と反対側面に貼付固定された金属製の外装板である。
【００２３】
上記各遮音板４と各断面コ字状溝３における自動車道路と反対側の側面との隙間（隙間量Ｓ＝Ｗ−ｔ）には、弾性復元力により該遮音板４を断面コ字状溝３の自動車道路側の側面に押圧しかつばね鋼材等からなる板バネ式の遮音板留め金具１０が装着されている。この留め金具１０は、上記各遮音板４の長さ方向両端部の上端部に設けられていて、遮音板４の厚み方向における自動車道路と反対側面（上記隙間側面）の上端部を自動車道路側に押圧するように構成されている。尚、上記各遮音板４の上端部における自動車道路側部には、下側に凹む段差部４ａが形成され、この段差部４ａと断面コ字状溝３の自動車道路側の側面との間には、この遮音板４の直ぐ上側に積み重ねられる遮音板４の下端部に設けた凸部４ｂが挿入されるようになっており、このことで、遮音板４の下端部の厚み方向への移動が規制されるようになっている。
【００２４】
上記留め金具１０は、具体的には、図３及び図４に示すように、該留め金具１０が上記隙間に装着されたときに、下面が上記遮音板４の上端面に当接しかつ該上端面に突設された断面円形の嵌合部４ｃ（図６参照）と略嵌合する嵌合孔１１ａを有する取付辺部１１を備えている。この取付辺部１１の自動車道路と反対側端部には、略上下方向に延びる第１縦辺部１２の上端部が接続されている。この第１縦辺部１２の厚み方向における自動車道路側面は、留め金具１０が上記隙間に装着されたときに、略全体的に上記遮音板４の厚み方向における上記隙間側面に当接するようになっている。
【００２５】
上記第１縦辺部１２の下端部には、該第１縦辺部１２と対向しかつ第１縦辺部１２との水平距離が上側に向かって大きくなるように略上下方向に延びる第２縦辺部１３の下端部が接続されている。この第２縦辺部１３の厚み方向における上記第１縦辺部１２と反対側面（自動車道路と反対側面）の上端部は、留め金具１０が上記隙間に装着されたときに、上記断面コ字状溝３の自動車道路と反対側の側面に当接するようになっている。
【００２６】
上記第２縦辺部１３の上端部には、該上端部から上記第１縦辺部１２側でかつ下側に延びる斜辺部１４が接続されている。この斜辺部１４の第１縦辺部１２側端部は、留め金具１０が上記隙間に装着されたときに、第１縦辺部１２の上下方向略中央部に当接するようになっている。尚、上記斜辺部１４の第１縦辺部１２側端部（下端部）は、略直角に曲げられて第２縦辺部１３側に僅かに突出している。
【００２７】
上記第１縦辺部１２ないし取付辺部１１の幅方向略中央部には、上記斜辺部１４ないし第２縦辺部１３の上端部（斜辺部１４と第２縦辺部１３との接続部）に対して係脱自在な係合部２０が設けられている。
この係合部２０は、基端部が第１縦辺部１２の上端部に一体に接続されかつ該基端部から上側（第２の縦辺部１３側に僅かに傾斜している）に延びて先端部が第１縦辺部１２の厚み方向に撓むことが可能な片持張り状の可撓部２１と、該可撓部２１の先端部に第２縦辺部１３側に突出するように形成されかつ第２縦辺部１３の上端部に対して上側を覆うように係合する２つの突起部２２，２２とからなっている（係合状態は、図４の二点鎖線又は図５を参照）。この各突起部２２の下面は、上記斜辺部１４ないし第２縦辺部１３の上端部に沿う円弧状をなしている。したがって、上記斜辺部１４ないし第２縦辺部１３の上端部は、上記係合部２０における可撓部２１の各突起部２２と係合する係合受部を構成し、この係合受部と係合部２０とは、第１縦辺部１２と第２縦辺部１３とを係合する係合手段を構成している。
【００２８】
上記係合部２０の両突起部２２，２２は、上記第１縦辺部１２の幅方向（可撓部２１の幅方向）に所定間隔をあけて設けられ、この両突起部２２，２２間における上記可撓部２１の先端部には、略上下方向（可撓部２１が延びる方向）に延びかつ上端部が該両突起部２２，２２よりも僅かに上側に位置する延設部２３が形成されている。
【００２９】
上記係合部２０の可撓部２１、各突起部２２及び延設部２３は、第１縦辺部１２と一体形成されている。具体的には、第１縦辺部１２の上端部から取付辺部１１にかけて、略凸形状に切り込みを形成し、第１縦辺部１２の上端部側になる略凸形状部分の基端部を基点として、切り込み部分を略９０°起こして可撓部２１を形成し、略凸形状部分の両側辺部をお互いに平行になるように略９０°折り曲げて突起部２２，２２を形成し、略凸形状部分の凸辺部を第２縦辺部１３側に少し折り曲げて延設部２３を形成している。
【００３０】
上記第１縦辺部１２及び第２縦辺部１３の上端部間の水平距離（対向面とは反対側面間の水平距離）は、上記係合部２０の各突起部２２と上記斜辺部１４ないし第２縦辺部１３の上端部とが係合していないときには、遮音板４と断面コ字状溝３における自動車道路と反対側の側面との隙間量Ｓよりも大きいＬ１に設定されている一方、係合しているときには、非係合時のＬ１よりも小さくかつ上記隙間量Ｓよりも小さいＬ２に設定されている。尚、上記第１縦辺部１２及び第２縦辺部１３の上端部間の水平距離が、係合時に上記隙間量Ｓと同じか又は少し大きくても、後述の如く遮音板留め金具１０を軽い力で所定位置に装着できればそれでもよい。
【００３１】
本発明では、特に、上記係合部２０の各突起部２２と上記斜辺部１４ないし第２縦辺部１３の上端部とが係合していないときには、上記第１縦辺部１２及び第２縦辺部１３は、図３及び図４に示すように、お互いに反り返った状態になるように形成してある。即ち、上記第１縦辺部１２及び第２縦辺部１３は、下端部から上端部にかけて湾曲して形成してある。このことにより、図４に２点鎖線で示すように、上記係合部２０の各突起部２２と上記斜辺部１４ないし第２縦辺部１３の上端部とが係合しているときには、上記第１縦辺部１２及び第２縦辺部１３は、少し中膨らみの太鼓形状であるが、中膨らみの太鼓形状が目立つほどではなく、ほぼ平行に近い形状に形成される。
【００３２】
したがって、遮音板留め金具１０を上記各遮音板４と各断面コ字状溝３における自動車道路と反対側の側面との隙間Ｓに挿入して、係合部２０による係合を外したときに、上記第１縦辺部１２及び第２縦辺部１３の上端部が遮音板４及び断面コ字状溝３の側面に当接し、上記第１縦辺部１２及び第２縦辺部１３の弾性復元力が十分に作用している。
【００３３】
本発明では、上記第１縦辺部１２及び第２縦辺部１３の上下中間部分に影響されずに、上記第１縦辺部１２及び第２縦辺部１３の上端部が遮音板４及び断面コ字状溝３の側面に当接するので、上記第１縦辺部１２及び第２縦辺部１３の上下中間部分に影響されずに、上記第１縦辺部１２及び第２縦辺部１３の上下方向の長さを十分に生かした状態で、遮音板留め金具１０の弾性復元力が作用し、十分な弾性係合状態を発揮できる。
【００３４】
上記のように、第１縦辺部１２及び第２縦辺部１３の上端部が遮音板４及び断面コ字状溝３の側面に当接して、弾性復元力が作用する形状であれば、１縦辺部１２及び第２縦辺部１３は、それぞれ１つの曲率で湾曲して形成しても良いし、複数の曲率で湾曲して形成しても良い。
【００３５】
以上のように構成された遮音板留め金具１０を遮音板４と断面コ字状溝３の自動車道路と反対側の側面との隙間に装着して該遮音板４を固定する方法を説明する。尚、留め金具１０を装着する段階では、外装板５は各支柱２に貼付固定されてはいない。
【００３６】
先ず、予め留め金具１０の第２縦辺部１３を第１縦辺部１２側に撓ませることにより、係合部２０の各突起部２２と斜辺部１４ないし第２縦辺部１３の上端部とを係合させておく。この係合は、留め金具１０の製造時に製造装置により行ってもよく、装着作業者が工具を用いて行ってもよい。そして、この状態を保持したまま、図６に示すように、留め金具１０の第１縦辺部１２及び第２縦辺部１３を、上記隙間に挿入しながら、取付辺部１１の嵌合孔１１ａを、遮音板４の上端面の嵌合部４ｃに嵌合させてセットする。このとき、第１縦辺部１２及び第２縦辺部１３の上端部間の水平距離Ｌ２が、上記隙間量Ｓよりも小さいので、第１縦辺部１２及び第２縦辺部１３の下端部から上端部に至るまでの全体を、上記隙間内に容易に挿入することができる。すなわち、従来のように係合部２０がない状態では、第１縦辺部１２及び第２縦辺部１３の上端部を上記隙間内に挿入するには、上側からハンマー等により叩いて無理矢理挿入する必要があったが、このような作業は全く行わなくてもよい。
【００３７】
次いで、図７に示すように、上記係合部２０の延設部２３と斜辺部１４ないし第２縦辺部１３の上端部との間に、先端部が楔状に形成されたドライバー等の工具５０を、上側でかつ断面コ字状溝３の開口側から差し込んで回したりこじたりすることにより、係合部２０の各突起部２２と斜辺部１４ないし第２縦辺部１３の上端部との係合を解除する。このとき、延設部２３がなければ、工具５０を各突起部２２と斜辺部１４ないし第２縦辺部１３の上端部との間に差し込んで上記係合を解除することになるが、延設部２３を設けたことにより、延設部２３がない場合よりも工具５０が差し込み易くなって係合解除を容易に行うことができる。
【００３８】
上述の如く係合部２０の各突起部２２と斜辺部１４ないし第２縦辺部１３の上端部との係合を解除すると、第２縦辺部１３における自動車道路と反対側面の上端部が断面コ字状溝３の自動車道路と反対側の側面に当接する一方、第１縦辺部１２の自動車道路側面の略全体が遮音板４の自動車道路と反対側面に当接し、このことで、遮音板４が断面コ字状溝３の自動車道路側の側面に押圧されて固定され、留め金具１０の装着が完了する（図８参照）。
【００３９】
したがって、上記実施形態では、係合部２０の各突起部２２と斜辺部１４ないし第２縦辺部１３の上端部とが係合しているときに、第１縦辺部１２及び第２縦辺部１３の上端部間の水平距離Ｌ２が非係合時のＬ１よりも小さくかつ遮音板４と断面コ字状溝３における自動車道路と反対側の側面との隙間量Ｓと同じレベルか又はその隙間量Ｓよりも小さくなるように構成されているので、予め係合部２０の各突起部２２と斜辺部１４ないし第２縦辺部１３の上端部とを係合しておけば、留め金具１０をハンマー等を用いて無理矢理挿入することなく容易に上記隙間に挿入することができ、しかも、その挿入後に上記係合の解除も容易に行える。よって、力の弱い作業者であっても留め金具１０を簡単な作業で容易に装着することができると共に、その装着作業時に大きな音が発生したり、留め金具１０が壊れたりするのを防止することができる。
【００４０】
本発明では、特に、上記第１縦辺部１２及び第２縦辺部１３がフリーな状態では互いに反り返る用に湾曲して形成されているので、留め金具１０を遮音板４と断面コ字状溝３における自動車道路と反対側の側面との隙間に挿入して、係合を解除した場合に、上記第１縦辺部１２及び第２縦辺部１３の上端部が遮音板４及び断面コ字状溝３の側面に当接し、その中間部分が当接しないので、上記第１縦辺部１２及び第２縦辺部１３の上下方向の長さを十分に生かした状態で、弾性復元力が作用する。
【００４１】
さらに、図９に示すように、係合部２０を、略Ｔ字状のスリットによって周囲から切り離すことで第１の縦辺部１２と一体形成するようにしてもよい。この場合、可撓部２１の先端部において第１の縦辺部１２の幅方向に突出した部分を略直角に曲げれば、２つの突起部２２，２２を形成することができると共に、該両突起部２２，２２間に延設部２３を形成することができる。また、この延設部２３の上端部位置を、各突起部２２よりも高くなるようにすることもできる。
【００４２】
さらにまた、図１０に示すように、可撓部２１の先端部の両側部に切り込みを入れてその上側部分を略直角に曲げることで突起部２２，２２を形成するようにしてもよい。この図９及び図１０のもののように、可撓部２１の両側部を内側に略直角に曲げることで突起部２２，２２を形成した場合には、第２の縦辺部１３の上端部との係合を確実に保持することができる。
【００４３】
加えて、係合部２０の可撓部２１は、第２縦辺部１３側に傾ける必要はなく、基端部から略真上に延びるようにしてもよく、係合部２０を、第１縦辺部１２とは別部材で構成してもよい。また、係合部２０を第１縦辺部１２に設けかつこの係合部２０と係合する係合受部を第２縦辺部１３に設ける必要はなく、逆に、係合部２０を第２縦辺部１３に設け、係合受部を第１縦辺部１２に設けるようにしてもよい。
【００４４】
さらに、取付辺部１１及び斜辺部１４は必ずしも必要ではない。つまり、遮音板４を押圧するのに十分な弾性復元力が得られれば、斜辺部１４はなくてもよく、留め金具１０の装着時に、第１縦辺部１２の自動車道路側面を遮音板４の自動車道路と反対側面に貼り付ける等すれば、取付辺部１１はなくてもよい。
【００４５】
また、上記実施形態では、係合部２０の各突起部２２と斜辺部１４ないし第２縦辺部１３の上端部とが係合しているときに、第１縦辺部１２及び第２縦辺部１３の上端部間の水平距離Ｌ２を、非係合時のＬ１よりも小さくかつ遮音板４と断面コ字状溝３における自動車道路と反対側の側面との隙間量Ｓよりも小さくなるようにすることが望ましいが、上記水平距離Ｌ２が上記隙間量Ｓ以上であっても、非係合時のＬ１よりも小さければ、第１及び第２の縦辺部１２，１３の上端部を上記隙間に挿入する作業は、非係合時よりもかなり容易になる。
【００４６】
【発明の効果】
以上説明したように、請求項１の発明では、所定間隔をあけて立設された一対の支柱の対向面に該支柱の長さ方向に延びて形成された断面コ字状溝と、相対向する断面コ字状溝間に該断面コ字状溝の溝幅よりも厚みが小さく設定されて嵌め込まれた遮音板との隙間に装着され、弾性復元力により該遮音板を断面コ字状溝の他方の側面に押圧する板バネ式の遮音板留め金具であって、略上下方向に延び、上記隙間に装着されたときに、厚み方向の一方の面が上記遮音板の厚み方向における該隙間側の面に当接する第１縦辺部と、上記第１縦辺部と対向しかつ該第１縦辺部との水平距離が上側に向かって大きくなるように略上下方向に延び、下端部が上記第１縦辺部の下端部に接続され、上記隙間に装着されたときに、厚み方向における第１縦辺部と反対側面の上端部が上記断面コ字状溝の一方の側面に当接する第２縦辺部と、
上記第１縦辺部と第２縦辺部とを係合する係合手段とを備え、該第１縦辺部及び第２縦辺部はお互いに湾曲して反り返る形状で形成され、上記係合手段により第１縦辺部及び第２縦辺部同士が係合されているときに、該第１縦辺部及び第２縦辺部の上端部間の水平距離が非係合時よりも小さくなるように構成した。
【００４７】
上記構成では、遮音板留め金具を装着する前に、予め係合手段により第１縦辺部及び第２縦辺部同士を、該第１縦辺部及び第２縦辺部の上端部間の水平距離が非係合時よりも小さくなるように係合しておき、その後、遮音板留め金具を、該遮音板留め金具の第１縦辺部及び第２縦辺部を、遮音板と断面コ字状溝における一方の側面との隙間に挿入しながら所定位置にセットし、次いで、上記係合手段による第１縦辺部及び第２縦辺部同士の係合を解除することにより、遮音板留め金具を上記隙間に装着することができる。したがって、この発明によると、力の弱い作業者であっても留め金具を簡単な作業で容易に装着することができ、安全で作業性に優れていると共に、その装着作業時に大きな音が発生したり、留め金具が壊れて散乱したりするのを防止することができる。それと共に、係合解除時、第１縦辺部及び第２縦辺部の上端部が確実に遮音板と断面コ字状溝とに当接するので、遮音板留め金具全体の十分な弾性復元力を作用させることができ、遮音板を断面コ字状溝に強固に弾性保持することができる。
【００４８】
請求項２の発明では、請求項１記載の防音壁の遮音板留め金具において、該第１縦辺部及び第２縦辺部がそれぞれ所定の曲率で互いに反る方向に湾曲して形成されているので、係合の解除時、第１縦辺部及び第２縦辺部の上端部が確実に遮音板と断面コ字状溝における一方の側面とに当接して、第１縦辺部及び第２縦辺部の上下方向全長での弾性復元力が作用するので、遮音板を断面コ字状溝への弾性保持力が向上する。
【００４９】
請求項５の発明では、請求項１ないし４のいずれか記載の防音壁の遮音板留め金具において、可撓部の両側部分が第２縦辺部側に突出するように略直角に折り曲げて突起部が形成されているので、上記突起部を第２縦辺部の上端部に係合した場合に、該第１縦辺部及び第２縦辺部の弾性復元力に負けることなく、係合状態を安定維持して得られる。
【００５０】
請求項６の発明では、請求項５記載の防音壁の遮音板留め金具において、略凸形状の留め金具の基端部が第１縦辺部の上端部に一体に連続形成され、第１縦辺部の厚み方向に撓むことが可能な片持張り状になっており、略凸形状の両端部がお互いに平行になるように略直角に折り曲げられて第２縦辺部側に突出するように形成され、かつ第２縦辺部の上端部に対して上側を覆うように係合する突起部として設けられ、略凸形状の先端部に略上下方向に延びて且つ第２縦辺部の方向に傾斜して形成された延設部が備えられているので、この延設部をガイドにして該延設部と第２縦辺部との間にドライバー等の工具を差し込むことにより、係合部と第２縦辺部との係合を容易に解除することができる。
【００５１】
【図面の簡単な説明】
【図１】本発明の実施形態１に係る遮音板留め金具が設けられた防音壁を示す断面図である。
【図２】図１のII−II線断面図である。
【図３】遮音板留め金具の詳細を示す斜視図である。
【図４】遮音板留め金具の側面図である。
【図５】係合部と第２の縦辺部の上端部とが係合している状態を示す図３相当図である。
【図６】遮音板留め金具の装着初期の状態を示す図１の要部拡大図である。
【図７】遮音板留め金具の装着途中の状態を示す図６相当図である。
【図８】遮音板留め金具の装着完了の状態を示す図６相当図である。
【図９】遮音板留め金具の係合部の変形例を示す図３相当図である。
【図１０】遮音板留め金具の係合部のさらなる変形例を示す図３相当図である。
【図１１】従来の遮音板留め金具を示す。
【符号の説明】
１防音壁
２支柱
３断面コ字状部
４遮音板
１０遮音板留め金具
１２第１の縦辺部
１３第２の縦辺部
１６連結辺部
１７上辺部
１８下辺部
２０係合部（係合手段）
２１可撓部
２２突起部
２３延設部
２４湾曲部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a leaf spring type sound insulation plate fastener for fixing a sound insulation plate in a sound insulation wall.
[0002]
[Prior art]
In general, the soundproof walls provided on both sides of a motorway, for example, as shown in Japanese Utility Model Laid-Open No. 4-57513, are provided with a plurality of struts erected at predetermined intervals and a pair of adjacent ones. A U-shaped cross-section groove that is formed on the opposing surface of the column and extends in the length direction of the column, and is fitted between the opposed U-shaped cross-section grooves, and has a thickness that is greater than the groove width of the U-shaped groove. And a sound insulation board set small. A leaf spring type sound insulation plate fastener is attached to the clearance (gap in the groove width direction) between the sound insulation plate and one side surface of the U-shaped groove in cross section, and the sound insulation plate is attached by the elastic restoring force of the fastener. The other side surface of the U-shaped groove is pressed and fixed.
[0003]
The fastener basically extends in a substantially vertical direction, and when mounted in the gap, the first vertical surface in which one surface in the thickness direction contacts the surface on the gap side in the thickness direction of the sound insulating plate. When the horizontal portion is provided so that the horizontal distance between the side portion and the first vertical side portion and the first vertical side portion increases toward the upper side, and the fastener is attached to the gap, the thickness direction The upper end of the side opposite to the first vertical side is provided with a second vertical side that abuts against one side of the U-shaped groove. The lower ends of the first vertical side portion and the second vertical side portion are connected to each other through a connecting side portion as described in the above publication, or disclosed in, for example, Japanese Utility Model Publication No. 61-50109. As shown in the figure, they are directly connected without going through the connecting side portion.
[0004]
The horizontal distance between the lower ends of the first vertical side and the second vertical side is set smaller than the gap, while the horizontal distance between the upper ends is set larger than the gap. In order to attach the fastener to the gap between the sound insulating plate and the U-shaped groove, first, the lower ends of the first vertical side and the second vertical side are inserted into the gap, By hitting the metal fitting with a hammer or the like from the upper side, the upper ends of the first vertical side and the second vertical side are bent toward each other and completely inserted into the gap.
[0005]
However, in the above conventional fastener mounting method, it is necessary to hit the fastener with a heavy hammer so that it takes time for the mounting work and it is impossible to allow a weak worker to perform the mounting work. There's a problem. In addition, a loud noise is generated during the mounting operation, and the fastener may be damaged.
[0006]
Japanese Patent Laid-Open No. 10-245821 is known as a countermeasure against this problem. In this structure, the first vertical side portion that extends substantially in the vertical direction and has one surface in the thickness direction that contacts the surface on the gap side in the thickness direction of the sound insulating plate when mounted in the gap, The first vertical side portion is opposed to the first vertical side portion so that the horizontal distance between the first vertical side portion and the first vertical side portion increases in a substantially vertical direction, and the lower end portion is connected to the lower end portion of the first vertical side portion, A second vertical side portion in which the upper end portion of the side surface opposite to the first vertical side portion in the thickness direction contacts the one side surface of the U-shaped cross-section groove when mounted in the gap; and the first vertical side portion, Engagement means for engaging with the second vertical side portion, and when the first vertical side portion and the second vertical side portion are engaged with each other by the engagement means, the first vertical side portion And the thing comprised so that the horizontal distance between the upper end parts of a 2nd vertical side part may become smaller than the time of non-engagement is disclosed.
[0007]
The fastener of the above publication includes a compressed state holding mechanism that holds the first vertical side portion and the second vertical side portion in a compressed state. With this compressed state holding mechanism, the fastener can be inserted into the gap between the U-shaped groove and the soundproof wall without forcibly hitting with a hammer. When the compressed state is released, the elastic force can be restored and the gap can be held elastically.
[0008]
[Problems to be solved by the invention]
However, in the case where the fastener is free and V-shaped, when the upper end portions of the first vertical side portion 112 and the second vertical side portion 113 are brought close to each other by the engaging means 200 and are compressed, FIG. As shown in FIG.
[0009]
When the compressed state is released from this state, the upper end portions of the first vertical side portion and the second vertical side portion open in a direction away from each other by the restoring elastic force, but may not be restored to the original V shape.
As a result of studying this point, in the case where the gap between the U-shaped groove and the soundproof wall was originally small, the compressed state was released because the gap between the bulging portion of the fastener during insertion and the gap was very narrow. In this case, before the upper ends of the first vertical side portion and the second vertical side portion contact the U-shaped groove and the soundproof wall, the swollen portion of the fastener comes into contact with the U-shaped groove and the soundproof wall. It turned out that. In this state, the restoring elastic force acts in a V-like manner with the lengths of the first vertical side portion, the lower end portion of the second vertical side portion, and the middle swelling portion, and the first vertical side portion and the second vertical side portion As a result, the elastic holding force is insufficient because the restoring force of the upper end of the plate does not act.
[0010]
That is, as in the prior art, the first vertical side and the second vertical side are formed in a substantially V shape in a free state, and when engaged by the engaging means, the first vertical side When the portion and the second vertical side portion are formed in a large middle bulge shape (drum shape), when the first vertical side portion and the second vertical side portion are inserted into the gap and released from engagement, The upper and lower middle part (the drum-shaped middle bulge part) will first come into contact with the sound insulating plate and the side surface of the U-shaped groove in cross section, and the upper ends of the first vertical side part and the second vertical side part will not come into contact with each other. Even if it comes into contact, it is only touched (a state in which the elastic restoring force does not act). As a result, the elastic restoring force of the sound insulating plate fastener is determined by the restoring force of the middle bulge portion of the drum shape of the first vertical side portion and the second vertical side portion, and the spring action becomes weak.
[0011]
Particularly, when the first vertical side portion and the second vertical side portion of the fastener are inserted into a predetermined gap to release the engagement, the angle between the first vertical side portion and the second vertical side portion is 15 ° or less. In the case of such a narrow gap, when the compressed state is released, the middle swelling portion of the fastener first comes into contact with the U-shaped groove and the soundproof wall.
[0012]
The present invention has been made in view of such a point, and the object of the present invention is to improve the structure of the sound insulation plate fastener of the sound insulation wall as described above, thereby improving the structure of the sound insulation plate and the cross section. The purpose of this is to ensure that the elastic restoring force of the clasp mounted in the gap with the letter-shaped groove acts sufficiently. In particular, when the compressed state is released, the upper ends of the first vertical side and the second vertical side abut against the U-shaped groove and the soundproof wall, and the elastic restoring force of this part acts. Is.
[0013]
In order to achieve the above object, the invention of claim 1 is characterized in that a U-shaped groove having a cross-section formed in the lengthwise direction of the struts on the opposing surfaces of a pair of struts erected at a predetermined interval. The sound insulation plate is mounted in a gap between the opposing U-shaped grooves with a thickness smaller than the groove width of the U-shaped groove and fitted with the sound insulation plate. A leaf spring type sound insulation plate clamp that presses against the other side surface of the letter-shaped groove, extending substantially in the vertical direction, and when mounted in the gap, one surface in the thickness direction is the thickness direction of the sound insulation plate The first vertical side that is in contact with the surface on the gap side and the first vertical side that faces the first vertical side and extends in a substantially vertical direction so that a horizontal distance between the first vertical side and the first vertical side increases upward. When the lower end portion is connected to the lower end portion of the first vertical side portion and attached to the gap, the second end in the thickness direction is Engaging means for engaging the second vertical side portion with which the upper end portion of the side surface opposite to the vertical side portion is in contact with one side surface of the U-shaped groove, and the first vertical side portion and the second vertical side portion And the first vertical side and the second vertical side are Each of them has a predetermined curvature and is curved in a direction that warps each other When the first vertical side portion and the second vertical side portion are engaged with each other by the engaging means, the horizontal distance between the upper ends of the first vertical side portion and the second vertical side portion is not engaged. It is the structure characterized by being comprised so that it may become smaller than time.
[0014]
With the above configuration, when the engagement portion is engaged with the upper end portion of the second vertical side portion, the horizontal distance between the first vertical side portion and the upper end portion of the second vertical side portion is set to the sound insulating plate and the U-shaped cross section. It can be made to be substantially the same as the gap amount with one side surface in the groove or smaller than the gap amount. As a result, the worker only needs to release the above-mentioned engagement by inserting a fastener that has previously engaged the engaging portion and the upper end portion of the second vertical side portion into the gap, and a worker with weak force. Even so, it is possible to easily and smoothly attach the fasteners with a simple operation, and it is possible to prevent a loud noise or breakage of the fasteners during the attachment operation. When the engagement is released, the upper end portions of the first vertical side portion and the second vertical side portion are surely brought into contact with the sound insulating plate and one side surface of the U-shaped groove, so that the first vertical side portion And the sound insulation board can be firmly elastically held in the U-shaped cross-section groove by the elastic restoring force of the first vertical side part and the second vertical side part that fully utilizes the vertical length of the second vertical side part.
[0015]
According to a second aspect of the present invention, in the sound insulating plate fastener of the soundproof wall according to the first aspect, the first vertical side portion and the second vertical side portion have a predetermined length between the first vertical side portion and the second vertical side portion. When the engagement is released by inserting it into the gap, the angle between the first vertical side and the second vertical side is 15 ° or less. When the engagement is released, the first vertical side and The upper end portion of the second vertical side portion is surely brought into contact with the sound insulating plate and one side surface of the U-shaped groove, and the elastic restoring force of the entire length in the vertical direction of the first vertical side portion and the second vertical side portion acts. Therefore, the sound insulating plate can be firmly elastically held in the U-shaped groove.
[0016]
According to a third aspect of the present invention, in the sound insulating plate fastener of the soundproof wall according to the first or second aspect, the engaging means is provided at an upper end portion of the first vertical side portion, and at an upper end portion of the second vertical side portion. On the other hand, it is a structure provided with the engaging part which can be engaged / disengaged, and an engaging part can be formed with a simple structure. Further, the engaging portion can be formed integrally with the first vertical side portion, and the engaging portion can be formed at a low cost.
[0017]
According to a fourth aspect of the present invention, in the sound insulating plate fastener of the soundproof wall according to any one of the first to third aspects, the engaging means is formed on one of the first vertical side portion and the second vertical side portion. It is composed of a cantilevered flexible part and an engagement receiving part that is formed on the other side and engages with the flexible part. The engaging part can be formed with a simple structure and can be engaged at low cost. The part can be formed. In addition, the fastener can be easily installed and the engagement can be easily released, which can greatly reduce the burden on the operator.
[0018]
According to a fifth aspect of the present invention, in the sound insulating plate fastener of the soundproof wall according to any one of the first to fourth aspects, the engaging means has a base end portion connected to the first vertical side portion and the base end portion. A cantilevered flexible portion extending upward and having a distal end portion capable of bending in the thickness direction of the first vertical side portion, and both side portions of the flexible portion project toward the second vertical side portion side. And a projecting portion that is formed to be bent substantially at right angles to the upper end portion of the second vertical side portion so as to cover the upper side, and the upper end portion of the second vertical side portion, The engagement is reliable and the engagement state is stably maintained.
[0019]
According to a sixth aspect of the present invention, in the soundproof plate fastener of the soundproof wall according to the fifth aspect, the engaging means is formed in a substantially convex shape, and the proximal end portion of the substantially convex shape is the upper end of the first vertical side portion. The first vertical side portion is bent in a cantilever shape that can be bent in the thickness direction, and is bent at a substantially right angle so that both ends of the substantially convex shape are parallel to each other. 2 It is formed as a protrusion that protrudes toward the vertical side and is engaged with the upper end of the second vertical side so as to cover the upper side. Since the extended portion formed to extend and incline in the direction of the second vertical side portion is provided, a driver is provided between the extended portion and the second vertical side portion using the extended portion as a guide. The tool can be inserted, and the engaging part and the second vertical side part can be turned by turning or prying the tool in the inserted state. It is possible to release the engagement easily.
[0020]
The invention of claim 7 is the sound insulation plate fastener of the soundproof wall according to claim 5 or 6, wherein the upper end portion of the second vertical side portion is on the first vertical side portion side and lower side from the upper end portion. And the lower surface of the projection is formed in an arc shape along the upper end of the oblique side or the second vertical side, and the projection and the second vertical side Engagement with the upper end part of the part is ensured, the engagement state is stably maintained, and the releasing operation can be performed smoothly.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2 show a soundproof wall 1 provided with a sound insulation plate fastener 10 according to Embodiment 1 of the present invention, and the soundproof wall 1 is oriented along the motorway on both sides of the motorway (see FIG. 1). .. Are provided with a predetermined interval in a direction perpendicular to the paper surface of FIG. The upper part of each column 2 is curved in an arc shape toward the automobile road side. Each of the columns 2 is made of H-shaped steel and has two U-shaped grooves 3 and 3 extending in the length direction of the column 2, and the opening of each of the U-shaped grooves 3 is an automobile road. Is set up so as to face the direction along the length (the length direction of the soundproof wall 1). That is, each U-shaped groove 3 in cross section is formed on the opposing surfaces of a pair of adjacent columns 2 and 2.
[0022]
Between the opposed U-shaped grooves 3 and 3 on the opposing surfaces of the pair of support columns 2 and 2, a plurality of sound insulating plates 4, 4,... Extending in the direction along the automobile road are stacked in the vertical direction. It is inserted in the state. Each of the sound insulating plates 4 is made of a plastic such as polycarbonate or a box type made of iron and aluminum, and the thickness t is set smaller than the groove width W of the U-shaped groove 3 in cross section. In FIG. 1 and FIG. 2, reference numeral 5 denotes a metal exterior plate that is affixed and fixed to the side surface of each support column 2 opposite to the automobile road.
[0023]
In the gap (gap amount S = W−t) between each sound insulating plate 4 and the side surface opposite to the automobile road in each U-shaped groove 3, the sound insulating plate 4 is made to have a U-shaped groove by the elastic restoring force. A leaf spring type sound insulation plate clasp 10 made of spring steel or the like is mounted on the side surface of the automobile road 3. The fastener 10 is provided at the upper end of each end portion in the length direction of each of the sound insulation plates 4, and the upper end portion of the side surface (the gap side surface) opposite to the automobile road in the thickness direction of the sound insulation plate 4 is the automobile road side. It is comprised so that it may press. In addition, a stepped portion 4a that is recessed downward is formed on the side of the automobile road at the upper end of each of the sound insulation plates 4, and between the stepped portion 4a and the side surface of the U-shaped groove 3 on the side of the automobile road. Has a convex portion 4b provided at the lower end portion of the sound insulating plate 4 that is stacked immediately above the sound insulating plate 4, so that the lower end portion of the sound insulating plate 4 is moved in the thickness direction. Are now regulated.
[0024]
Specifically, as shown in FIGS. 3 and 4, when the fastener 10 is mounted in the gap, the lower surface abuts the upper end surface of the sound insulating plate 4 and An attachment side portion 11 having a fitting hole 11a that substantially fits with a fitting portion 4c (see FIG. 6) having a circular cross section that protrudes from the end surface is provided. An upper end portion of the first vertical side portion 12 extending substantially in the vertical direction is connected to the end portion of the attachment side portion 11 opposite to the automobile road. The side surface of the automobile road in the thickness direction of the first vertical side portion 12 comes to substantially abut against the side surface of the gap in the thickness direction of the sound insulating plate 4 when the fastener 10 is mounted in the gap. ing.
[0025]
A second lower end of the first vertical side portion 12 extends substantially in the vertical direction so as to face the first vertical side portion 12 and to increase the horizontal distance from the first vertical side portion 12 upward. The lower end portion of the vertical side portion 13 is connected. The upper end portion of the side surface opposite to the first vertical side portion 12 in the thickness direction of the second vertical side portion 13 (the side surface opposite to the automobile road) has a U-shaped cross section when the fastener 10 is mounted in the gap. The groove 3 comes into contact with the side surface opposite to the automobile road.
[0026]
An oblique side portion 14 is connected to the upper end portion of the second vertical side portion 13 and extends downward from the upper end portion on the first vertical side portion 12 side. The end portion of the oblique side portion 14 on the first vertical side portion 12 side comes into contact with the substantially vertical central portion of the first vertical side portion 12 when the fastener 10 is mounted in the gap. Note that the first vertical side 12 side end (lower end) of the oblique side 14 is bent substantially at a right angle and slightly protrudes toward the second vertical side 13.
[0027]
At the substantially central portion in the width direction of the first vertical side portion 12 or the attachment side portion 11, there is an upper end portion of the oblique side portion 14 or the second vertical side portion 13 (the connection portion between the oblique side portion 14 and the second vertical side portion 13. ) Is provided.
The engaging portion 20 has a base end portion integrally connected to the upper end portion of the first vertical side portion 12 and is located above the base end portion (inclined slightly toward the second vertical side portion 13). A cantilevered flexible portion 21 that extends and can bend in the thickness direction of the first vertical side portion 12, and protrudes toward the second vertical side portion 13 at the distal end portion of the flexible portion 21. And two projecting portions 22 and 22 engaged so as to cover the upper end of the second vertical side portion 13 (the engaged state is a two-dot chain line in FIG. 4). Or see FIG. The lower surface of each projection 22 has an arc shape along the upper end of the oblique side 14 or the second vertical side 13. Therefore, the upper end portion of the oblique side portion 14 to the second vertical side portion 13 constitutes an engagement receiving portion that engages with each projection portion 22 of the flexible portion 21 in the engaging portion 20, and this engagement receiving portion. The engaging portion 20 constitutes an engaging means for engaging the first vertical side portion 12 and the second vertical side portion 13.
[0028]
Both protrusions 22, 22 of the engaging portion 20 are provided at a predetermined interval in the width direction of the first vertical side portion 12 (width direction of the flexible portion 21), and between the protrusions 22, 22. In the distal end portion of the flexible portion 21, there is an extended portion 23 that extends in a substantially vertical direction (direction in which the flexible portion 21 extends) and whose upper end portion is positioned slightly above the projecting portions 22, 22. Is formed.
[0029]
The flexible portion 21, the protruding portions 22, and the extending portion 23 of the engaging portion 20 are integrally formed with the first vertical side portion 12. Specifically, a cut is formed in a substantially convex shape from the upper end portion of the first vertical side portion 12 to the attachment side portion 11, and the base end portion of the substantially convex shape portion that becomes the upper end portion side of the first vertical side portion 12. , The cut portion is raised approximately 90 ° to form the flexible portion 21, the side portions of the substantially convex portion are bent approximately 90 ° so as to be parallel to each other, and the protrusions 22, 22 are formed, The extended portion 23 is formed by slightly bending the convex side portion of the substantially convex portion toward the second vertical side portion 13 side.
[0030]
The horizontal distance between the upper ends of the first vertical side portion 12 and the second vertical side portion 13 (the horizontal distance between the side surfaces opposite to the opposing surface) is the projections 22 of the engaging portion 20 and the oblique side portion 14. When the upper end portion of the second vertical side portion 13 is not engaged, it is set to L1 which is larger than the gap amount S between the sound insulating plate 4 and the side surface on the opposite side in the U-shaped groove 3 in cross section. On the other hand, when engaged, it is set to L2 smaller than L1 at the time of non-engagement and smaller than the gap amount S. Even if the horizontal distance between the upper end portions of the first vertical side portion 12 and the second vertical side portion 13 is the same as or slightly larger than the gap amount S at the time of engagement, the sound insulating plate fastener 10 is fixed as described later. It may be sufficient if it can be mounted in a predetermined position with a light force.
[0031]
In the present invention, the first vertical side portion 12 and the second vertical side portion 12 and the second vertical side portion 12 are particularly engaged when the protrusions 22 of the engaging portion 20 are not engaged with the upper sides of the oblique side portion 14 or the second vertical side portion 13. As shown in FIGS. 3 and 4, the vertical side portion 13 is formed so as to be warped from each other. That is, the first vertical side portion 12 and the second vertical side portion 13 are formed to be curved from the lower end portion to the upper end portion. As a result, as shown by a two-dot chain line in FIG. 4, when each protrusion 22 of the engaging portion 20 is engaged with the upper end portion of the oblique side portion 14 or the second vertical side portion 13, The first vertical side portion 12 and the second vertical side portion 13 have a slightly swelled drum shape, but are not so conspicuous that the middle swelled drum shape is noticeable, and are formed in a shape that is almost parallel.
[0032]
Therefore, when the sound insulating plate fastener 10 is inserted into the gap S between each sound insulating plate 4 and the side surface opposite to the automobile road in each U-shaped groove 3 and the engagement by the engaging portion 20 is released. The upper ends of the first vertical side portion 12 and the second vertical side portion 13 are in contact with the side surfaces of the sound insulating plate 4 and the U-shaped groove 3, and the first vertical side portion 12 and the second vertical side portion 13 The elastic restoring force is acting sufficiently.
[0033]
In the present invention, the upper end portions of the first vertical side portion 12 and the second vertical side portion 13 are not affected by the upper and lower intermediate portions of the first vertical side portion 12 and the second vertical side portion 13, and the sound insulating plate 4 and Since it contacts the side surface of the U-shaped groove 3 in cross section, the first vertical side portion 12 and the second vertical side portion are not affected by the upper and lower intermediate portions of the first vertical side portion 12 and the second vertical side portion 13. The elastic restoring force of the sound insulating plate fastener 10 acts in a state where the vertical length of 13 is fully utilized, and a sufficient elastic engagement state can be exhibited.
[0034]
As described above, if the upper end portions of the first vertical side portion 12 and the second vertical side portion 13 are in contact with the side surfaces of the sound insulating plate 4 and the U-shaped groove 3, the elastic restoring force acts. The 1 vertical side part 12 and the 2nd vertical side part 13 may each be curved and formed with one curvature, and may be curved and formed with a plurality of curvatures.
[0035]
A method of fixing the sound insulating plate 4 by mounting the sound insulating plate fastener 10 configured as described above in the gap between the sound insulating plate 4 and the side surface of the U-shaped groove 3 opposite to the automobile road will be described. It should be noted that at the stage of attaching the fastener 10, the exterior plate 5 is not pasted and fixed to each column 2.
[0036]
First, by previously bending the second vertical side portion 13 of the fastener 10 toward the first vertical side portion 12, each projection 22 of the engaging portion 20 and the oblique side portion 14 or the upper end portion of the second vertical side portion 13. And are engaged. This engagement may be performed by a manufacturing apparatus when the fastener 10 is manufactured, or may be performed by a mounting operator using a tool. Then, with this state maintained, as shown in FIG. 6, the first vertical side portion 12 and the second vertical side portion 13 of the fastener 10 are inserted into the gap while fitting holes in the attachment side portion 11. 11a is fitted to the fitting portion 4c on the upper end surface of the sound insulating plate 4 and set. At this time, since the horizontal distance L2 between the upper ends of the first vertical side portion 12 and the second vertical side portion 13 is smaller than the gap amount S, the lower ends of the first vertical side portion 12 and the second vertical side portion 13 are used. The whole from the part to the upper end part can be easily inserted into the gap. That is, in the state where there is no engaging portion 20 as in the prior art, in order to insert the upper end portions of the first vertical side portion 12 and the second vertical side portion 13 into the gap, they are forcedly inserted by hitting with a hammer or the like from above. However, it is not necessary to perform such work at all.
[0037]
Next, as shown in FIG. 7, a tool such as a screwdriver whose tip is formed in a wedge shape between the extended portion 23 of the engaging portion 20 and the upper end portion of the oblique side portion 14 or the second vertical side portion 13. 50 is inserted from the opening side of the U-shaped groove 3 on the upper side and turned or twisted so that each protrusion 22 of the engaging portion 20 and the upper edge portion of the oblique side portion 14 or the second vertical side portion 13 Release the engagement. At this time, if there is no extending portion 23, the tool 50 is inserted between each protruding portion 22 and the oblique side portion 14 or the upper end portion of the second vertical side portion 13 to release the engagement. By providing the installation portion 23, the tool 50 can be inserted more easily than when the extension portion 23 is not provided, and the engagement can be easily released.
[0038]
As described above, when the engagement between the protrusions 22 of the engaging portion 20 and the upper end portion of the oblique side portion 14 or the second vertical side portion 13 is released, the upper end portion of the second vertical side portion 13 opposite to the automobile road is While contacting the side surface of the U-shaped groove 3 opposite to the automobile road, substantially the entire side of the automobile road side of the first vertical side 12 abuts the side surface of the sound insulating plate 4 opposite to the automobile road, The sound insulation plate 4 is pressed and fixed to the side surface of the U-shaped groove 3 on the side of the automobile road, and the mounting of the fastener 10 is completed (see FIG. 8).
[0039]
Therefore, in the said embodiment, when each projection part 22 of the engaging part 20 and the upper edge part of the oblique side part 14 thru | or the 2nd vertical side part 13 are engaging, the 1st vertical side part 12 and the 2nd vertical side. The horizontal distance L2 between the upper ends of the side portions 13 is smaller than L1 at the time of non-engagement and is the same level as the gap amount S between the sound insulating plate 4 and the side surface on the opposite side in the U-shaped groove 3 or Since it is configured to be smaller than the gap amount S, if the respective protrusions 22 of the engaging portion 20 are engaged with the oblique side portion 14 or the upper end portion of the second vertical side portion 13 in advance, the fastening is achieved. The metal fitting 10 can be easily inserted into the gap without using a hammer or the like, and the engagement can be easily released after the insertion. Therefore, even if it is an operator with weak power, the fastener 10 can be easily attached by a simple operation, and a loud sound is generated during the attachment operation, and the fastener 10 is prevented from being broken. be able to.
[0040]
In the present invention, in particular, since the first vertical side portion 12 and the second vertical side portion 13 are curved so as to warp each other in a free state, the fastener 10 is formed in a U-shaped cross section with the sound insulating plate 4. When the groove 3 is inserted into the gap between the side opposite to the automobile road and the engagement is released, the upper ends of the first vertical side 12 and the second vertical side 13 are connected to the sound insulating plate 4 and the cross-section Since it contacts the side surface of the letter-shaped groove 3 and the intermediate portion thereof does not contact, the elastic restoring force is obtained in a state where the vertical lengths of the first vertical side portion 12 and the second vertical side portion 13 are fully utilized. Works.
[0041]
Furthermore, as shown in FIG. 9, the engaging portion 20 may be integrally formed with the first vertical side portion 12 by being separated from the surroundings by a substantially T-shaped slit. In this case, if the portion protruding in the width direction of the first vertical side portion 12 at the tip end portion of the flexible portion 21 is bent at a substantially right angle, the two protruding portions 22 and 22 can be formed, and both An extending portion 23 can be formed between the protruding portions 22 and 22. Further, the position of the upper end portion of the extending portion 23 can be made higher than each protruding portion 22.
[0042]
Furthermore, as shown in FIG. 10, the protrusions 22 and 22 may be formed by making cuts on both sides of the distal end portion of the flexible portion 21 and bending the upper portion thereof at a substantially right angle. 9 and 10, when the protrusions 22 and 22 are formed by bending both side portions of the flexible portion 21 inward at substantially right angles, the upper end portion of the second vertical side portion 13 and Can be reliably held.
[0043]
In addition, the flexible portion 21 of the engaging portion 20 does not need to be inclined to the second vertical side portion 13 side, and may extend substantially directly from the base end portion. You may comprise with the vertical side part 12 and another member. Further, it is not necessary to provide the engagement portion 20 on the first vertical side portion 12 and the engagement receiving portion to be engaged with the engagement portion 20 on the second vertical side portion 13. It may be provided in the second vertical side portion 13 and the engagement receiving portion may be provided in the first vertical side portion 12.
[0044]
Furthermore, the attachment side 11 and the oblique side 14 are not necessarily required. In other words, if an elastic restoring force sufficient to press the sound insulating plate 4 is obtained, the oblique side portion 14 may not be provided, and when the fastener 10 is mounted, the side surface of the motor vehicle road of the first vertical side portion 12 is connected to the sound insulating plate 4. If attached to the opposite side of the automobile road, the attachment side 11 may be omitted.
[0045]
Moreover, in the said embodiment, when each projection part 22 of the engaging part 20 and the upper edge part of the oblique side part 14 thru | or the 2nd vertical side part 13 are engaging, the 1st vertical side part 12 and the 2nd vertical side. The horizontal distance L2 between the upper end portions of the side portions 13 is smaller than L1 at the time of non-engagement, and smaller than the gap amount S between the sound insulating plate 4 and the side surface on the opposite side in the U-shaped groove 3 in cross section. Although it is desirable that the horizontal distance L2 is equal to or greater than the gap amount S, the upper ends of the first and second vertical side portions 12 and 13 can be used as long as the horizontal distance L2 is smaller than L1 when not engaged. The work of inserting into the gap is much easier than when not engaged.
[0046]
【The invention's effect】
As described above, according to the first aspect of the present invention, the U-shaped cross-section groove formed on the opposing surfaces of a pair of struts erected at a predetermined interval and extending in the length direction of the struts, The U-shaped groove is mounted in a gap between the U-shaped groove having a thickness smaller than the groove width of the U-shaped groove and is fitted into the U-shaped groove. A leaf spring type sound insulation plate clamp that presses against the other side surface of the sound insulation plate, and extends substantially in the vertical direction, and when attached to the gap, one surface in the thickness direction is the gap in the thickness direction of the sound insulation plate. A first vertical side that abuts the surface of the side, and extends substantially vertically so that the horizontal distance between the first vertical side and the first vertical side is larger toward the upper side, and the lower end Is connected to the lower end portion of the first vertical side portion and mounted in the gap, the first vertical length in the thickness direction A second vertical side portion of the upper end parts opposite side abuts on one side of the U-shaped cross section groove,
Engagement means for engaging the first vertical side portion and the second vertical side portion, the first vertical side portion and the second vertical side portion are formed in a shape that curves and warps each other. When the first vertical side portion and the second vertical side portion are engaged with each other by the combining means, the horizontal distance between the upper end portions of the first vertical side portion and the second vertical side portion is larger than that in the non-engagement state. It comprised so that it might become small.
[0047]
In the above configuration, before attaching the sound insulating plate fastener, the first vertical side portion and the second vertical side portion are connected in advance between the upper end portions of the first vertical side portion and the second vertical side portion by the engaging means. Engage so that the horizontal distance is smaller than when it is not engaged, and then cut the sound insulation plate fastener, the first vertical side portion and the second vertical side portion of the sound insulation plate fastener, and the sound insulation plate By inserting into the gap between one side surface of the U-shaped groove and setting it at a predetermined position, and then releasing the engagement between the first vertical side portion and the second vertical side portion by the engagement means, A plate fastener can be mounted in the gap. Therefore, according to the present invention, even a worker with weak force can easily attach the fastener with a simple operation, and is safe and excellent in workability, and a large noise is generated during the attachment operation. It is possible to prevent the clasps from being broken and scattered. At the same time, when the engagement is released, the upper ends of the first vertical side portion and the second vertical side portion are surely brought into contact with the sound insulating plate and the U-shaped groove, so that a sufficient elastic restoring force of the entire sound insulating plate fastener is obtained. The sound insulating plate can be firmly elastically held in the U-shaped groove.
[0048]
According to a second aspect of the present invention, in the sound insulating plate fastener of the soundproof wall according to the first aspect, the first vertical side portion and the second vertical side portion are each curved with a predetermined curvature in a direction that warps each other. Therefore, when the engagement is released, the upper ends of the first vertical side portion and the second vertical side portion are surely brought into contact with the sound insulating plate and one side surface of the U-shaped groove, and the first vertical side portion and Since an elastic restoring force acts on the entire length of the second vertical side in the vertical direction, the elastic holding force of the sound insulating plate to the U-shaped groove in cross section is improved.
[0049]
According to a fifth aspect of the present invention, in the sound insulating plate fastener of the soundproof wall according to any one of the first to fourth aspects, the projection is formed by bending the flexible portion at a substantially right angle so that both side portions protrude toward the second vertical side portion. When the protrusion is engaged with the upper end portion of the second vertical side portion, the engagement is performed without losing the elastic restoring force of the first vertical side portion and the second vertical side portion. It is obtained by maintaining a stable state.
[0050]
According to a sixth aspect of the present invention, in the sound insulating plate clasp of the soundproof wall according to the fifth aspect, the base end portion of the substantially convex clasp is integrally formed continuously on the upper end portion of the first vertical side portion, and the first vertical It has a cantilever shape that can be bent in the thickness direction of the side, and is bent at a substantially right angle so that both ends of the substantially convex shape are parallel to each other, and protrudes toward the second vertical side. And is provided as a projection that engages with the upper end of the second vertical side so as to cover the upper side, extends substantially vertically at the tip of the substantially convex shape, and the second vertical side Is provided with an extending portion that is inclined in the direction of, by inserting a tool such as a screwdriver between the extending portion and the second vertical side portion using the extending portion as a guide, The engagement between the engagement portion and the second vertical side portion can be easily released.
[0051]
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a soundproof wall provided with a sound insulating plate fastener according to Embodiment 1 of the present invention.
2 is a cross-sectional view taken along line II-II in FIG.
FIG. 3 is a perspective view showing details of a sound insulating plate fastener.
FIG. 4 is a side view of a sound insulating plate fastener.
FIG. 5 is a view corresponding to FIG. 3 showing a state in which the engaging portion is engaged with the upper end portion of the second vertical side portion.
6 is an enlarged view of a main part of FIG. 1 showing a state in which the sound insulating plate fastener is initially attached.
FIG. 7 is a view corresponding to FIG. 6 showing a state in the middle of mounting of the sound insulating plate fastener.
FIG. 8 is a view corresponding to FIG. 6 showing a state where the installation of the sound insulating plate fastener is completed.
FIG. 9 is a view corresponding to FIG. 3 showing a modification of the engaging portion of the sound insulating plate fastener.
FIG. 10 is a view corresponding to FIG. 3 showing a further modification of the engaging portion of the sound insulating plate fastener.
FIG. 11 shows a conventional sound insulation plate fastener.
[Explanation of symbols]
1 sound barrier
2 props
3 U-shaped section
4 Sound insulation board
10 Sound insulation plate bracket
12 First vertical side
13 Second vertical side
16 Connection side
17 Upper side
18 Lower side
20 Engagement part (engagement means)
21 Flexible part
22 Protrusion
23 Extension
24 Curved part

Claims

A cross-sectional U-shaped groove formed in the opposing direction of a pair of struts erected at a predetermined interval extending in the length direction of the strut, and a U-shaped cross-section between the opposing U-shaped grooves A leaf spring type sound insulating plate that is mounted in a gap with a sound insulating plate that is set to have a thickness smaller than the groove width of the groove and that presses the sound insulating plate against the other side surface of the U-shaped groove in an elastic restoring force A first vertical side portion, which is a fastener, extends substantially in the vertical direction, and one surface in the thickness direction contacts the surface on the gap side in the thickness direction of the sound insulating plate when attached to the gap; The first vertical side is opposed to the first vertical side and extends in a substantially vertical direction so that a horizontal distance from the first vertical side increases toward the upper side, and a lower end is connected to a lower end of the first vertical side. When mounted in the gap, the upper end of the side opposite to the first vertical side in the thickness direction is the U-shaped groove in the cross section. A second vertical side portion that comes into contact with the other side surface, and an engaging means for engaging the first vertical side portion and the second vertical side portion, wherein the first vertical side portion and the second vertical side portion are Each of the first vertical side portion and the second vertical side portion, when the first vertical side portion and the second vertical side portion are engaged with each other by the engagement means. A sound insulation plate fastener for a soundproof wall, characterized in that the horizontal distance between the upper ends of the second vertical sides is smaller than that at the time of non-engagement.

The sound insulation plate fastener for a soundproof wall according to claim 1, wherein the first vertical side portion and the second vertical side portion are engaged by inserting the first vertical side portion and the second vertical side portion into a predetermined gap. The sound insulation plate fastener of the soundproof wall is characterized in that the angle between the first vertical side portion and the second vertical side portion is 15 ° or less when is released .

The sound insulation plate fastener for a soundproof wall according to claim 1 or 2, wherein the engaging means is provided at an upper end portion of the first vertical side portion and is detachable with respect to an upper end portion of the second vertical side portion. A sound-insulating plate fastener for a sound-proof wall comprising an engaging part.

The sound insulation plate fastener for a soundproof wall according to any one of claims 1 to 3, wherein the engaging means is a cantilever beam-like formed on one of the first vertical side and the second vertical side. A sound insulation plate fastener for a soundproof wall, comprising: a bending portion; and an engagement receiving portion formed on the other side and engaged with the flexible portion.

5. The sound insulating plate fastener for a soundproof wall according to claim 1, wherein the engaging means has a base end portion connected to the first vertical side portion and extending upward from the base end portion, and a tip end portion thereof. A cantilevered flexible portion that can be bent in the thickness direction of the first vertical side portion, and formed by bending at a substantially right angle so that both side portions of the flexible portion protrude toward the second vertical side portion. And a sound insulation plate fastener for a soundproof wall, comprising a projection that engages with the upper end of the second vertical side so as to cover the upper side.

The sound insulation plate fastener for a soundproof wall according to claim 5, wherein the engaging means is formed in a substantially convex shape, and a proximal end portion of the substantially convex shape is connected to an upper end portion of the first vertical side portion, It has a cantilever shape that can bend in the thickness direction of the vertical side, and is bent at a substantially right angle so that both ends of the substantially convex shape are parallel to each other and protrudes toward the second vertical side And is provided as a protrusion that engages with the upper end of the second vertical side so as to cover the upper side, and the substantially convex tip end is inclined in the direction of the second vertical side. A sound insulation plate clasp for a soundproof wall characterized by being formed.

The sound insulating plate fastener for a soundproof wall according to claim 5 or 6, wherein an oblique side portion 14 extending from the upper end portion toward the first vertical side portion and downward is connected to the upper end portion of the second vertical side portion. The sound insulating plate fastener of the soundproof wall is characterized in that the lower surface of the protruding portion is formed in an arc shape along the upper end portion of the oblique side portion or the second vertical side portion.