JP2004190307A

JP2004190307A - Sound insulating panel

Info

Publication number: JP2004190307A
Application number: JP2002358562A
Authority: JP
Inventors: Nobuo Hayashi; 伸郎林; Masatoshi Ichihara; 正稔市原; Shuji Tsurishima; 修二釣島; Masahiro Iga; 正浩伊賀
Original assignee: Takiron Co Ltd; JFE Metal Products and Engineering Inc
Current assignee: Takiron Co Ltd; JFE Metal Products and Engineering Inc
Priority date: 2002-12-10
Filing date: 2002-12-10
Publication date: 2004-07-08
Anticipated expiration: 2022-12-10
Also published as: JP4057901B2

Abstract

<P>PROBLEM TO BE SOLVED: To absorb the thermal expansion of a sound insulating plate to eliminate flexural deformation into wavy shape, and to exhibit excellent buffer action while preventing the break of the sound insulating plate at the collision of an automobile regarding a sound insulating panel extended between posts erected every prescribed space in the lengthwise direction of a road at the shoulder part of a highway. <P>SOLUTION: Three side parts, i.e., the upper end part and both side end parts of the sound insulating plate 5 formed of polycarbonate resin are mounted to a rectangular frame comprising upper and lower lateral frame members 1, 2 and both side vertical frame members 3, 4, by a plurality of bolts. As the mounting structure of both side end parts of the sound insulating plate 5 to both side vertical frame members 3, 4, both side end parts of the sound insulating plate 5 are provided with a plurality of laterally-long holes 7, and bolts 8A, 8B with diameters smaller than the minor axis dimension of the laterally-long holes 7 are inserted through the respective laterally-long holes 7. The sound insulating plate 5 is loosely mounted movably in the plane direction by the bolts 8A, 8B. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、高速道路の路肩や側壁に配設して、走行する自動車等の騒音を遮断するための遮音パネルに関するものである。
【０００２】
【従来の技術】
従来から、高速道路を走行する自動車からの騒音が道路周辺の住宅等に伝わるのを防止したり、或いは、道路側からの投物が路肩から落下するのを防止するために、道路の路肩に道路に沿って遮音パネルを張りめぐらすことが行われている。このような遮音パネルとしては、上下横枠材と両側縦枠材とによって矩形状枠を形成し、この矩形状枠に遮音板を嵌め込んで、該遮音板の上端部を上側横枠材に複数個のボルトにより固着していると共に該遮音板の両側端部と下端部とを押し縁材によってこれらの両側縦枠材と下側横枠材とにおける受け部に押しつけて押し縁材と受け部とにより遮音板の両側端部と下端部とを挟持した状態にして該押し縁部をボルトにより両側縦枠材と下側横枠材とに固定した構造のものが知られている（例えば、特許文献１参照）。また、矩形状枠の上下横枠材と両側縦枠材とに遮音板の上下端部と両側端部、即ち、遮音板の四方縁辺部をボルトにより固着した構造の遮音パネルもある。
【０００３】
【特許文献１】特開平９−１５１４１８号公報（第３頁、第３図）。
【０００４】
【発明が解決しようとする課題】
しかしながら、前者の遮音パネルによれば、遮音板はその上端部のみを上側横枠材に複数個のボルトで固着する一方、両側端部と下端部とをボルトで固着することなく、両側縦枠材と押し縁材、及び、下側横枠材と押し縁材によって単に挟持した構造としているため、遮音板に自動車が衝突した場合、該遮音板はＶ字状に屈曲、変形しながらその両側端部と下端部とが両側縦枠材と押し縁材間、及び、下側横枠材と押し縁材間から抜け出て衝撃力を充分に受止することができなく安全面において問題点がある。
【０００５】
一方、後者の遮音パネルによれば、上下横枠材と両側縦枠材とからなる矩形状枠に遮音板の四方縁辺部をボルトによって強固に固着しているので、遮音板に自動車が衝突しても遮音板が矩形状枠から抜け出る虞れはないが、遮音板がポリカーボネート樹脂のように、熱による伸長、収縮率の大きい樹脂板からなる場合には、その伸縮によって遮音板が波打ち状に撓み変形し、外観が見苦しくなるという問題点がある。
【０００６】
本発明は上記のような問題点に鑑みてなされたもので、その目的とするところは、冬期と夏期の温度差等により発生する透光性樹脂製の遮音板の伸長、収縮を吸収して波打ち状に撓み変形するのをなくすると共に、自動車が衝突した際には遮音板の屈曲による緩衝作用を効果的に発揮させて遮音板の割れを防止しながら衝撃力を吸収することができる遮音パネルを提供するにある。
【０００７】
【課題を解決するための手段】
上記目的を達成するために、本発明の遮音パネルは、請求項１に記載したように、上下横枠材と両側縦枠材とによって形成された矩形状枠に透光性樹脂よりなる遮音板を張設してなる遮音パネルであって、遮音板はその下端部を除く上端部と両側端部とを上側横枠材と両側縦枠材とに複数個のボルト・ナットによってそれぞれ取付けられた構造を有し、この構造において、上側横枠材に対しては遮音板の上端部を上記ボルト・ナットにより固定している一方、遮音板の両側端部においては、その両側端部に横長孔を上下方向に一定間隔毎に設けられていてこの横長孔に該横長孔の短径寸法よりも小径のボルトを挿通してナットにより該遮音板の両側端部を両側縦枠材に板面方向に移動可能に取り付けた構造としている。
【０００８】
このように構成した遮音パネルにおいて、請求項２に係る発明は、遮音板の両側端部に設けている上記横長孔の形状を、長円形状孔又は楕円形状孔に形成していることを特徴とする。
【０００９】
また、請求項３に係る発明は、矩形状枠における上記両側縦枠材の構造であって、前後方向に一定幅を有する外側板部の内側面前後部に内側方に向かって一定の突出幅を有する前側支持枠部とこの前側支持枠部よりも突出幅が小さい後側支持枠部とをそれぞれ突設し、且つ、これらの前後支持枠部の対向面間に遮音板の側端部を受け入れる挿入溝を設けていると共に上記後側支持枠部の突出端面に押し縁材を重ね合わせ、この押し縁材と前側支持枠部の突出端部間を上記挿入溝に挿入した遮音板の側端部に設けている横長孔を通じてボルト・ナットにより連結していることを特徴としている。
【００１０】
さらに、上記請求項１、請求項２又は請求項３に記載の遮音パネルにおいて、請求項４に係る発明は、上記両側縦枠材における外側板部の前端面に外側方に向かって一定幅を有する固定用板部を突設し、この固定用板部を支柱にボルト・ナットによって固着するように構成している。
【００１１】
【作用】
遮音板はその上端部に複数個のボルト取付孔を設けていると共に、両側端部に横方向に長い長円形状又は楕円形状の横長孔を上下方向に一定間隔毎に設けてあり、その上端部を上記ボルト取付孔を通じてボルト・ナットにより矩形状枠における上側横枠材に固着すると共に両側端部を上記横長孔を通じて該横長孔の短径よりも小径のボルトにより両側縦枠材に緊締することなく板面方向に伸縮移動可能に取り付けているので、この遮音板は熱による伸長、収縮の大きい透光性樹脂よりなるにもかかわらず、上下左右方向への伸縮を許容して波打ち状に撓み変形することはない。
【００１２】
また、遮音板は上記のように、その下端部を除く上端部と両側端部とを上側横枠材と両側縦枠材とに複数個のボルト・ナットによってそれぞれ取付けられているから、自動車がこの遮音パネルの遮音板に衝突しても、遮音板がボルト・ナットによって保持されて枠材から抜け出るのを阻止することができる。
【００１３】
さらに、自動車が遮音板に衝突した際には、その衝撃力によって遮音板が衝撃を受けた個所に向かって屈曲変形しようとするが、その際、遮音板の両側端部はボルト・ナットによって緊締されることなく緩く締めつけられており、且つ、該ボルトの径よりもこのボルトを挿通させている横長孔の径を大径に形成していると共に、下端部はボルト・ナットにより固定されていないので、遮音板は衝撃力によって上記横長孔の孔壁がボルトに当接するまで容易に屈曲変形して衝撃力を緩衝することができる。
【００１４】
また、このボルトを挿通させている孔が円形孔の場合には、遮音板の両側端部が衝撃を受けた個所に向かって引き寄せられて該円形孔がボルトに当接した時に、このボルト当接点における孔壁に対する接線方向が上記遮音板の引き寄せ方向、即ち、衝撃点とボルトの中心とを結ぶ線に対して常に直角となり、従って、遮音板がそれ以上、屈曲変形するのを強固に阻止された状態となってその時の孔壁とボルトとの衝撃力が強大となってその衝撃力で遮音板が割れ易くなるが、本発明においては、上記のように、ボルトを挿通させている孔は、その長径方向を遮音板の幅方向に向けている長円形状孔又は楕円形状孔からなる横長孔であるから、遮音板が衝撃力を受けた際にその衝撃力を受けた個所に向かって遮音板の両側端部が引き寄せられる方向に対して、即ち、衝撃点とボルトの中心とを結ぶ線に対してボルトが当接する孔壁部分は傾斜しており、従って、ボルトと孔壁とが当接した後においてもボルトが孔壁に圧接しながら横長孔の端部に向かって摺動し、その間に衝撃力を吸収、減衰させて遮音板が割れることなく優れた緩衝作用を発揮するものである。
【００１５】
【発明の実施の形態】
次に本発明の具体的な実施の形態を図面について説明すると、図１において、遮音パネルＡは、一定長さと厚みを有する上下横枠材１、２と両側縦枠材３、４とを矩形状に組み合わせて固定してなる矩形状枠に矩形状の遮音板５を張設してなるものであり、上下横枠材１、２及び両側縦枠材３、４はアルミニウム、又はアルミ合金製の中空フレーム材からなる一方、遮音板５は透光性と遮音性とを有する一定厚みのポリカーボネート樹脂板や耐衝撃アクリル樹脂板などから形成されている。
【００１６】
この遮音板５の上端部には図２に示すように、幅方向に所定間隔毎に円形のボルト取付孔６、６・・・が設けられていると共に、両側端部には上下方向に所定間隔毎に長径方向を遮音板５の左右方向に向けている長円形状孔又は楕円形状孔からなる横長孔７、７・・・が設けられている。これらの横長孔７の短径寸法は、該横長孔７を通じて遮音板５を両側縦枠材３、４に取付けるための後述するボルト８Ａ、８Ｂの径よりも大径に形成している。そして、横長孔７の長径寸法を短径寸法の１．２〜２．０倍となしている。例えば、このボルト８Ａ、８Ｂの径が６ｍｍであれば、該横長孔７の短径寸法を８ｍｍ、長径寸法を１２ｍｍに形成している。
【００１７】
上記矩形状枠における両側縦枠材３、４は図３に示すように、横断面形状が対称な形状に形成されてあり、前後方向に一定幅を有する縦長帯板形状の外側板部３ａ、４ａと、この外側板部３ａ、４ａの対向側面、即ち、内側面の前後部に内側方に向かって突設している前側中空支持枠部３ｂ、４ｂ及び該前側中空支持枠部３ｂ、４ｂよりも内側方への突出幅の短い後側中空支持枠部３ｃ、４ｃと、これらの前後中空支持枠部３ｂ、３ｃの前後対向面間及び前後中空支持枠部４ｂ、４ｃの前後対向面間でそれぞれ形成されている遮音板５の側端部挿入溝３ｄ、４ｄと、上記前側中空支持枠部３ｂ、４ｂからこれらの前側中空支持枠部３ｂ、４ｂの前面と面一となるように外側方に向かって突設している一定幅を有するボルト固定用板部３ｅ、４ｅと、内側方への突出幅の短い上記後側中空支持枠部３ｃ、４ｃの突出端面、即ち、内側端面に全長に亘って重ね合わされ、固定されている中空の押し縁材３ｆ、４ｆとから形成されている。
【００１８】
そして、このように後側中空支持枠部３ｃ、４ｃの突出端面に押し縁材３ｆ、４ｆをそれぞれ重ね合わせて固定した際の突出幅（突出高さ）は上記前側中空支持枠部３ｂ、４ｂの突出幅（突出高さ）に略等しく形成されてあり、さらに、押し縁材３ｆ、４ｆの前面部、即ち、前側中空支持枠部３ｂ、４ｂの後面部と対向する面に、上記遮音板５の両側端部に設けている横長孔７、７・・・と同一間隔毎に複数個のボルト挿通孔３１、４１をそれぞれ設けていると共に、各ボルト挿通孔３１、４１に連通させて押し縁材３ｆ、４ｆ内にナット体３２、４２を固着している。
【００１９】
一方、上記前側中空支持枠部３ｂ、４ｂの突出端部の前後面に長さ方向に上記ボルト挿通孔３１、４１と同一間隔毎にこれらのボルト挿通孔３１、４１と対向するボルト挿通孔３３、４３をそれぞれ設けてあり、前側中空支持枠部３ｂ、４ｂの前面側から各ボルト挿通孔３３、４３にボルト８Ａ、８Ｂを挿入し、該ボルト８Ａ、８Ｂを上記挿入溝３ｄ、４ｄ内に挿入された遮音板５の側端部に設けている横長孔７を挿通させて上記押し縁材３ｆ、４ｆのナット体３２、４２に螺合させることにより、遮音板５の両側端部を前側中空支持枠部３ｂ、４ｂと押し縁材３ｆ、４ｆとの対向面で該遮音板５が板面方向に伸縮移動できるように緩く挟持した状態で取付けている。
【００２０】
このとき、ボルト８Ａ、８Ｂの先端が押し縁材３ｆ、４ｆの内面内側に当接し、それ以上ボルト８Ａ、８Ｂが螺入しないようにすることで、遮音板側端部挿入溝３ｄ、４ｄの隙間を保っている。そして、遮音板５が熱によって膨脹、収縮した時に、ボルト８Ａ、８Ｂよりも大径の横長孔７の孔壁と該ボルト８Ａ、８Ｂの外周面との間の隙間によってその膨脹、収縮代を吸収させるように形成している。
【００２１】
また、両側縦枠材３、４における前側中空支持枠部３ｂ、４ｂから外側方に向かって突設している上記一定幅を有するボルト固定用板部３ｅ、４ｅには、その幅方向の中央部に、長さ方向に所定間隔毎にボルト取付孔９Ａ、９Ｂを設けていると共に、これらのボルト固定用板部３ｅ、４ｅの外側端に係止溝１０Ａ、１０Ｂをそれぞれ設けてあり、さらに、両側縦枠材３、４の外側板部３ａ、４ａの後端に、外側方に向かって小幅の突片部１１Ａ、１１Ｂをそれぞれ突設している。そして、横断面Ｌ字状のカバー部材１２Ａ、１２Ｂの前端縁に形成している係止片１３Ａ、１３Ｂを上記係止溝１０Ａ、１０Ｂにそれぞれ係止させると共にこのカバー部材１２Ａ、１２Ｂの後面板部の内端を上記突片部１１Ａ、１１Ｂの後面上に重ね合わせてビス１４Ａ、１４Ｂにより固定することにより、カバー部材１２Ａ、１２Ｂによってボルト固定用板部３ｅ、４ｅの後面をそれぞれ全面的に被覆し、上記ボルト取付孔９Ａ、９Ｂを通じて支柱Ｂ、Ｂに両側縦枠材３、４のボルト固定用板部３ｅ、４ｅを固着するボルト１５Ａ、１５Ｂを隠蔽するように構成している。
【００２２】
一方、上記両側縦枠材３、４と共に遮音パネルＡの矩形状枠を形成している上記上下横枠材１、２においては、図４に示すように、遮音板５の上下端部の前面をそれぞれ受止する壁面部１Ａ、２Ａを形成していると共に、遮音板５の上下端部の後面に当てがって該遮音板５の上下端部を上記壁面部１Ａ、２Ａと共に保持する中空押し縁材１６Ａ、１６Ｂをそれぞれ設けてあり、これらの上下押し縁材１６Ａ、１６Ｂをボルト１７Ａ、１７Ｂによって上下横枠材１、２の後部にそれぞれ取り外し可能に固着している。さらに上側横枠材１においては、その中空押し縁材１６Ａの前面に長さ方向（遮音板５の幅方向）に一定間隔毎に複数個のボルト挿通孔１８を設けていると共にこれらの各ボルト挿通孔１８に連通させて該押し縁材１６Ａ内にナット体１９を固着している。
【００２３】
また、遮音板５の上端部に該遮音板５の幅方向に一定間隔毎にボルト挿通孔６を設けて各ボルト挿通孔６を通じてボルト２１を挿通し、その先端部を上記ナット体１９に螺締することによって遮音板５の上端部をこれらの複数個のボルト２１によって押し縁材１６Ａを介し、上側横枠材１に固着している。遮音板５の下端部は、下側横枠材２の壁面部２Ａと中空押し縁材１６Ｂにより挟持されているだけであり、ボルト挿通孔は開設されていない。
【００２４】
遮音板５は上下横枠材１、２と両側縦枠材３、４とで形成された矩形状枠に張設される前に、予め、該遮音板５の上端部後面に上記押し縁材１６Ａを複数個のボルト２１によって上記のように装着、固定しておき、しかるのち、遮音板５の前面上下端部を上下横枠材１、２の壁面部１Ａ、２Ａに当てがうと共に前面両側端部を両側縦枠材３、４の対向面に形成している挿入溝３ｄ、４ｄにそれぞれ挿入させた状態にし、上下横枠材１、２側においては上下押し縁材１６Ａ、１６Ｂをボルト１７Ａ、１７Ｂによって上下横枠材１、２の後部下面に固着する。
【００２５】
一方、両側縦枠材３、４側においては、押し縁材３ｆ、４ｆをそれぞれ遮音板５の両側端部の後面に載置し、且つこれらの押し縁材３ｆ、４ｆの外側端面を両側縦枠材３、４の後側中空支持部３ｃ、４ｃの内側面に接した状態にして、例えば、押し縁材３ｆ、４ｆの内側よりボルトを挿通、螺合して後側中空支持部３ｃ、４ｃに固定する。そして、該押し縁材３ｆ、４ｆに設けている各ボルト挿通孔３１、４１を遮音板５の両側端部に設けている各横長孔７と前側中空支持部３ｂ、４ｂに設けているボルト挿通孔３３、４３とにそれぞれ同一中心線上で連通させ、しかるのち、前側中空支持部３ｂ、４ｂの前面側から各ボルト挿通孔３３、４３を通じてボルト８Ａ、８Ｂを挿通し、これらのボルト８Ａ、８Ｂの先端部を押し縁材３ｆ、４ｆ内に固着しているナット体３２、４２に螺合することによって、遮音板５の両側端部を前側中空支持部３ｂ、４ｂと押し縁材３ｆ、４ｆとで挟持させて両側縦枠材３、４に固定させる。この際、前側中空支持部３ｂ、４ｂと押し縁材３ｆ、４ｆとによる遮音板５の挟持は、該遮音板５の熱伸縮を妨げないように軽く接した状態ないしは僅かな隙間を存した挟持状態にしている。なお、両側縦枠材３、４の上端開口部は、図１に示すように取り外し可能なキャップ体２２によって密閉している。
【００２６】
このように構成した遮音パネルＡを、高速道路端等に沿って一定間隔毎に立設しているＨ形鋼からなる支柱Ｂ、Ｂ・・・における隣接する支柱Ｂ、Ｂ間に施工するには、遮音パネルＡの両側ボルト固定用板部３ｅ、４ｅを被覆しているカバー部材１２Ａ、１２Ｂを取り外した状態にしてその両側ボルト固定用板部３ｅ、４ｅを支柱Ｂ、Ｂにおけるフランジ部Ｂ１、Ｂ１間上に架設し、これらのボルト固定用板部３ｅ、４ｅに設けているボルト取付孔９Ａ、９Ｂを上記フランジ部Ｂ１、Ｂ１に予め長さ方向に該ボルト取付孔９Ａ、９Ｂと同一間隔毎に穿設しているボルト取付孔ｂ、ｂ・・にそれぞれ合致させ、ボルト取付孔９Ａ、９Ｂ側からボルト１５Ａ、１５Ｂを挿通させて支柱Ｂ側のボルト取付孔ｂから突出する該ボルト１５Ａ、１５Ｂにナット２３を螺合させることによって行われる。そして、支柱Ｂ、Ｂ間に該遮音パネルＡを張設、施工したのち、両側ボルト固定用板部３ｅ、４ｅ上にカバー部材１２Ａ、１２Ｂをそれぞれ取付けてボルト１５Ａ、１５Ｂを隠蔽する。
【００２７】
このような遮音パネルＡの施工作業を、各隣接する支柱Ｂ、Ｂのフランジ部Ｂ１、Ｂ１間において、長さ方向に複数枚の遮音パネルＡが積み重なるように順次行うことにより、遮音壁を構築するものである。
【００２８】
こうして施工された遮音パネルＡにおいて、遮音板５は熱による伸長、収縮の大きいポリカーボネート樹脂板からなるので、冬期と夏期とにおける温度差等によって伸縮するが、該遮音板５はその上端部のみを上側横枠材１の押し縁材１６Ａに複数個のボルト２１によって強固に固定しているだけで、下端部はボルトによる固定などはなされてなく、両側端部は上述したように両側縦枠材３、４の前側中空支持部３ｂ、４ｂと押し縁材３ｆ、４ｆとによって挟持状態でボルト８Ａ、８Ｂにより取付られていてもその挟持状態は、遮音板５の熱伸縮を妨げない程度のルーズな状態であり、且つ、ボルト８Ａ、８Ｂを挿通させている横長孔７とこれらのボルト８Ａ、８Ｂとの間には熱収縮を吸収可能な隙間を設けているので、遮音板５は長さ方向、幅方向に自由に伸縮することができる。
【００２９】
また、遮音パネルＡの遮音板５に自動車が衝突した場合、遮音板５は、まず、その両側端に設けている横長孔７、７・・・がボルト８Ａ、８Ｂに当接するまで前方側、即ち、道路外に向かって屈曲変形し、この変形によって衝撃力を吸収、緩和すると共にボルト８Ａ、８Ｂにより遮音板５が両側縦枠材３、４から抜け出るのを防止する。
【００３０】
衝撃力により遮音板５が屈曲変形してその横長孔７、７をボルト８Ａ、８Ｂに当接すると、衝撃力はこの横長孔７、７を介してボルト８Ａ、８Ｂに作用することになる。この際、図５に示すように、自動車が遮音板５に衝突した点をＯとすると、遮音板５の両側端部に設けている横長孔７側はこの衝突点Ｏに向かって引き寄せられながら遮音板５は屈曲変形することになる。そして、衝突点Ｏよりも上側に設けられている横長孔７に対してはボルト８Ａ、８Ｂは該横長孔７の上側長辺における外側部の孔壁に当接し、衝突点Ｏよりも下側に設けられている横長孔７に対してはボルト８Ａ、８Ｂは該横長孔７の下側長辺における外側部の孔壁に当接した状態となる。
【００３１】
この状態において、遮音板５の屈曲変形によって横長孔７が衝突点Ｏに向かって引き寄せられる方向は、衝突点Ｏと該横長孔７に挿通しているボルト８Ａ又は８Ｂの中心を結ぶ直線Ｒ方向であり、この直線Ｒが交差する上記横長孔７のボルト当接側の長辺部の孔壁における接線Ｌは、直線Ｒに対して傾斜している。
【００３２】
そして、横長孔７の外側端部側においてはこの接線Ｌと上記直線Ｒとのなす角度が鈍角となるため、横長孔７が直線Ｒ方向に衝突点Ｏに向かって引き寄せられると、ボルト８Ａ又は８Ｂが横長孔７の長辺側の孔壁に接しながら上記接線Ｌ上を横長孔７の外側端部に向かって相対的に移動し、従って、遮音板５はさらに屈曲、変形して衝撃力を吸収、緩和し、ボルト８Ａ又は８Ｂが横長孔７の外側端部の湾曲孔壁面に達した時にそれ以上の移動が阻止され、衝撃力はこのボルト８Ａ、８Ｂから両側縦枠材３、４を介して支柱Ｂ、Ｂに強固に受止されるものである。
【００３３】
上記ように、遮音板５が移動するため、ボルト８Ａ、８Ｂが横長孔７の孔壁に当接するまでに動く距離が短く、孔壁へ加わる衝撃が大きくならず、その後も滑りながら移動し、右端にて受け止められる際にも、それ程大きな衝撃力が加わらず、横長孔７に亀裂が発生することがないのである。
【００３４】
【発明の効果】
以上のように本発明の遮音パネルによれば、請求項１に記載したように、上下横枠材と両側縦枠材とによって形成された矩形状枠に透光性樹脂よりなる遮音板を張設してなる遮音パネルであって、遮音板はその下端部を除く上端部と両側端部とを上側横枠材と両側縦枠材とに複数個のボルト・ナットによってそれぞれ取付けられた構造を有し、この構造において、上側横枠材に対しては遮音板の上端部を上記ボルト・ナットにより固定している一方、遮音板の両側端部においては、その両側端部に横長孔を上下方向に一定間隔毎に設けられていてこの横長孔に該横長孔の短径寸法よりも小径のボルトを挿通してナットにより該遮音板の両側端部を両側縦枠材に板面方向に移動可能に緩く取り付けているので、遮音板の上下左右方向への伸縮を許容して遮音板が波打ち状に撓み変形したり、亀裂等が発生するのを防止することができる。
【００３５】
さらに、上記のように、遮音板の両側端部が複数個のボルト・ナットによって矩形状枠の両側縦枠材に取付けられているから、この遮音パネルの遮音板に自動車等が衝突しても、その衝撃力によって遮音板が両側縦枠材から離脱するのを確実に防止することができる。
【００３６】
遮音板の両側端部に設けている孔は、その長径方向を遮音板の幅方向に向けている長円形状孔又は楕円形状孔からなる横長孔であるから、遮音板が衝撃力を受けた際に該遮音板の両側端部がその衝撃力を受けた個所に向かって引き寄せられるが、その引き寄せられる方向に対してボルトが当接する孔壁部分は常に傾斜した状態となり、従って、ボルトと孔壁とが当接した後においてもボルトが孔壁に圧接しながら横長孔の端部に向かって摺動し、その間に衝撃力を吸収、減衰させて優れた緩衝作用を発揮することができると共に遮音板の割れを防止することができる。
【００３７】
また、請求項３に係る発明によれば、遮音パネルの上記両側縦枠材は、前後方向に一定幅を有する外側板部の内側面前後部に内側方に向かって一定の突出幅を有する前側支持枠部とこの前側支持枠部よりも突出幅が小さい後側支持枠部とをそれぞれ突設し、且つ、これらの前後支持枠部の対向面間に遮音板の側端部を受け入れる挿入溝を設けているので、遮音板の両側端部を両側の挿入溝に挿入することによって、該遮音板を簡単且つ正確な位置に配置することができ、その上、上記後側支持枠部の突出端面に押し縁材を重ね合わせ、この押し縁材と前側支持枠部の突出端部間を上記挿入溝に挿入した遮音板の側端部に設けている横長孔を通じてボルト・ナットにより連結しているので、両側縦枠材に遮音板の両側端部を伸縮が可能な取付構造となるように容易に装着することができる。
【００３８】
さらに、請求項４に係る発明によれば、上記遮音パネルの両側縦枠材における外側板部の前端面に外側方に向かって一定幅を有する固定用板部を突設し、この固定用板部を支柱にボルト・ナットによって固着するように構成しているので、支柱に対する遮音パネルの取付作業が道路側から確実に且つ能率よく行うことができる。
【図面の簡単な説明】
【図１】遮音パネルを正面側から見た状態の簡略斜視図、
【図２】遮音板の簡略斜視図、
【図３】支柱間に取付けた状態の一部を省略した横断面図、
【図４】遮音パネルの中間部を省略した中央縦断側面図、
【図５】衝撃を受けた時の作用を説明するための遮音板の一部正面図。
【符号の説明】
１、２上下横枠材
３、４両側縦枠材
３ａ、４ａ外側板部
３ｂ、４ｂ前側中空支持枠部
３ｃ、４ｃ後側中空支持枠部
３ｄ、４ｄ挿入溝
３ｆ、４ｆ押し縁材
５遮音板
６ボルト取付孔
７横長孔
８Ａ、８Ｂボルト[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound insulation panel disposed on a shoulder or a side wall of a highway to block noise of a running automobile or the like.
[0002]
[Prior art]
Conventionally, to prevent noise from cars running on a highway from being transmitted to houses around the road, or to prevent projectiles from the road from falling off the road shoulder, Sound insulation panels are stretched along the road. As such a sound insulating panel, a rectangular frame is formed by upper and lower horizontal frame materials and vertical frame materials on both sides, a sound insulating plate is fitted into the rectangular frame, and the upper end of the sound insulating plate is used as an upper horizontal frame material. The sound insulating plate is fixed by a plurality of bolts, and both side ends and a lower end of the sound insulating plate are pressed against the receiving portions of the vertical frame members on both sides and the lower horizontal frame member by pressing rims, and the pressing rim is received. There is known a structure in which both end portions and a lower end portion of a sound insulating plate are sandwiched between portions and a pressing edge portion is fixed to both vertical frame members and lower horizontal frame members by bolts (for example, And Patent Document 1). There is also a sound insulation panel having a structure in which upper and lower ends and both side ends of a sound insulation plate, that is, four sides of the sound insulation plate are fixed to upper and lower horizontal frame members and both vertical frame members of a rectangular frame with bolts.
[0003]
[Patent Document 1] JP-A-9-151418 (page 3, FIG. 3).
[0004]
[Problems to be solved by the invention]
However, according to the former sound insulation panel, only the upper end portion of the sound insulation plate is fixed to the upper horizontal frame member with a plurality of bolts, while the both end portions and the lower end portion are not fixed to each other with the bolts. When the vehicle collides with the sound insulating plate, the sound insulating plate bends and deforms in a V-shape, so that both sides of the sound insulating plate are deformed. The end and the lower end escape from between the vertical frame material and the pressing edge material on both sides, and between the lower horizontal frame material and the pressing edge material and cannot sufficiently receive the impact force, and there is a problem in safety. is there.
[0005]
On the other hand, according to the latter, the four sides of the sound insulating plate are firmly fixed to the rectangular frame consisting of the upper and lower horizontal frame members and the vertical frame members on both sides with bolts, so that the vehicle collides with the sound insulating plate. There is no danger that the sound insulating plate will fall out of the rectangular frame, but if the sound insulating plate is made of a resin plate with a large expansion and shrinkage rate due to heat, such as a polycarbonate resin, the expansion and contraction will cause the sound insulating plate to have a wavy shape. There is a problem that it is bent and deformed, and the appearance becomes unsightly.
[0006]
The present invention has been made in view of the above-described problems, and aims to absorb the elongation and shrinkage of a light-transmitting resin sound insulation plate generated due to a temperature difference between winter and summer. Sound insulation that eliminates wavy deformation and, in the event of an automobile collision, effectively absorbs the impact force while preventing the sound insulation plate from cracking by effectively exhibiting the cushioning effect of the sound insulation plate bending. In providing the panel.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a sound insulating panel according to the present invention, as described in claim 1, has a sound insulating plate made of a translucent resin in a rectangular frame formed by upper and lower horizontal frame members and both side vertical frame members. A sound insulating plate, the upper end of which is excluding the lower end and both end portions are respectively attached to the upper horizontal frame member and both vertical frame members by a plurality of bolts and nuts. In this structure, the upper end of the sound insulating plate is fixed to the upper horizontal frame member by the above-mentioned bolts and nuts. Are provided at regular intervals in the vertical direction, and a bolt having a smaller diameter than the minor diameter of the oblong hole is inserted into this oblong hole, and both ends of the sound insulating plate are attached to the longitudinal frame material by nuts on both sides of the longitudinal frame material. It is structured to be movable to
[0008]
In the sound insulation panel configured as described above, the invention according to claim 2 is characterized in that the shape of the oblong hole provided at both end portions of the sound insulation plate is formed as an oval hole or an oval hole. And
[0009]
Further, the invention according to claim 3 is the structure of the vertical frame material on both sides of the rectangular frame, wherein a constant protruding width toward the inside is formed at the front and rear portions on the inner side surface of the outer plate portion having a certain width in the front and rear direction. The front support frame portion and the rear support frame portion having a smaller projecting width than the front support frame portion are respectively protruded, and the side end of the sound insulating plate is received between the opposing surfaces of the front and rear support frame portions. A side edge of the sound insulating plate is provided with an insertion groove and a pressing edge material is superimposed on the protruding end surface of the rear support frame portion, and a space between the pressing edge material and the protruding end portion of the front support frame portion is inserted into the insertion groove. It is characterized by being connected by bolts and nuts through a horizontally long hole provided in the part.
[0010]
Furthermore, in the sound insulation panel according to claim 1, 2, or 3, the invention according to claim 4 is characterized in that a constant width is provided outwardly on a front end face of an outer plate portion of the vertical frame members on both sides. The fixing plate portion is provided so as to protrude, and the fixing plate portion is fixed to the column with bolts and nuts.
[0011]
[Action]
The sound insulating plate has a plurality of bolt mounting holes at the upper end thereof, and has a horizontally long oval or elliptical horizontally long hole at both ends at regular intervals in the vertical direction. Parts are fixed to the upper horizontal frame member of the rectangular frame by bolts and nuts through the bolt mounting holes, and both side ends are tightened to the vertical frame members by bolts having a smaller diameter than the short diameter of the horizontal elongated holes through the horizontal elongated holes. The sound insulation board is made of a translucent resin that expands and shrinks greatly due to heat, allowing it to expand and contract in the up, down, left, and right directions. There is no bending deformation.
[0012]
In addition, as described above, the sound insulating plate has its upper end excluding the lower end and both end portions attached to the upper horizontal frame member and both vertical frame members by a plurality of bolts and nuts, respectively. Even if the sound insulation panel collides with the sound insulation plate, the sound insulation plate is held by the bolts and nuts and can be prevented from falling out of the frame material.
[0013]
Furthermore, when the vehicle collides with the sound insulating plate, the impact force tends to cause the sound insulating plate to bend and deform toward the location where the impact was received. At this time, both ends of the sound insulating plate are tightened with bolts and nuts. The bolt is loosely tightened, and the diameter of the elongated hole through which the bolt is inserted is larger than that of the bolt, and the lower end is not fixed by the bolt and nut. Therefore, the sound insulating plate can be easily bent and deformed by the impact force until the hole wall of the horizontally long hole comes into contact with the bolt, thereby absorbing the impact force.
[0014]
If the hole through which the bolt is inserted is a circular hole, when both ends of the sound insulating plate are drawn toward the impacted portion and the circular hole comes into contact with the bolt, the bolt comes into contact with the bolt. The direction of the tangent to the hole wall at the contact point is always perpendicular to the pulling direction of the sound insulating plate, that is, the line connecting the point of impact and the center of the bolt, so that the sound insulating plate is firmly prevented from being further bent and deformed. In this state, the impact force between the hole wall and the bolt at that time becomes strong and the sound insulating plate is easily broken by the impact force. In the present invention, as described above, the hole through which the bolt is inserted is used. Is an oblong hole or an oval hole whose major axis is oriented in the width direction of the sound insulating plate, so that when the sound insulating plate receives an impact force, it faces the place where the impact force was applied. Side edges of the sound insulation board are drawn The hole wall portion where the bolt abuts with respect to the direction, that is, with respect to the line connecting the impact point and the center of the bolt, is inclined. It slides toward the end of the oblong hole while being pressed against the wall, absorbs and attenuates the impact force during that time, and exhibits an excellent cushioning effect without breaking the sound insulating plate.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, a specific embodiment of the present invention will be described with reference to the drawings. In FIG. 1, a sound insulation panel A is formed by forming upper and lower horizontal frame members 1 and 2 and both vertical frame members 3 and 4 having a certain length and thickness into a rectangular shape. The rectangular sound insulating plate 5 is stretched over a rectangular frame fixed in combination with the shape, and the upper and lower horizontal frame members 1 and 2 and both side vertical frame members 3 and 4 are made of aluminum or aluminum alloy. On the other hand, the sound insulating plate 5 is formed of a polycarbonate resin plate or a shock-resistant acrylic resin plate having a certain thickness and having light transmitting and sound insulating properties.
[0016]
As shown in FIG. 2, circular bolt mounting holes 6, 6,... Are provided at predetermined intervals in the width direction at the upper end of the sound insulating plate 5, and predetermined vertical There are provided oblong holes 7, 7,... Each having an elliptical hole or an elliptical hole whose major axis is directed in the left-right direction of the sound insulating plate 5 at each interval. The short diameter of these horizontally long holes 7 is formed larger than the diameters of bolts 8A and 8B, which will be described later, for attaching the sound insulating plate 5 to the vertical frame members 3 and 4 through the horizontally long holes 7. The major axis of the horizontally long hole 7 is 1.2 to 2.0 times the minor axis. For example, if the diameter of the bolts 8A and 8B is 6 mm, the short diameter of the horizontally long hole 7 is 8 mm and the long diameter is 12 mm.
[0017]
As shown in FIG. 3, both side vertical frame members 3 and 4 in the rectangular frame are formed to have a symmetrical cross-sectional shape, and have a longitudinally long strip-shaped outer plate portion 3a having a constant width in the front-rear direction. 4a, front hollow support frames 3b, 4b and front hollow support frames 3b, 4b projecting inward from front and rear portions of the inner side surfaces of the outer plate portions 3a, 4a. The rear hollow support frames 3c, 4c having a smaller inward width than the front hollow support frames 3b, 3c, and between the front and rear opposing surfaces of the front and rear hollow support frames 4b, 4c. And the outer end insertion grooves 3d and 4d of the sound insulation plate 5 formed from the front hollow support frame portions 3b and 4b so as to be flush with the front surfaces of the front hollow support frame portions 3b and 4b. Bolt fixing plate portions 3e, 4e having a fixed width and projecting toward And the hollow pressing edge members 3f, 4f that are overlaid and fixed over the entire length on the protruding end surfaces of the rear hollow support frame portions 3c, 4c having a short inward protruding width, that is, the inner end surfaces. Is formed.
[0018]
The protrusion width (projection height) when the pressing edge members 3f, 4f are respectively overlapped and fixed on the protruding end surfaces of the rear hollow support frame portions 3c, 4c in this way is the front hollow support frame portions 3b, 4b. And the front surface of the pressing edge members 3f, 4f, that is, the surface facing the rear surface of the front hollow support frames 3b, 4b. , A plurality of bolt insertion holes 31 and 41 are provided at the same intervals as the horizontally long holes 7 provided on both side ends of the bolt 5, and are pushed to communicate with the bolt insertion holes 31 and 41. The nut bodies 32 and 42 are fixed in the edge members 3f and 4f.
[0019]
On the other hand, bolt insertion holes 33 facing the bolt insertion holes 31, 41 at the same intervals in the longitudinal direction on the front and rear surfaces of the protruding ends of the front hollow support frame portions 3b, 4b. , 43 are provided respectively, and bolts 8A, 8B are inserted into the bolt insertion holes 33, 43 from the front side of the front hollow support frame portions 3b, 4b, and the bolts 8A, 8B are inserted into the insertion grooves 3d, 4d. By inserting the horizontally long holes 7 provided at the side ends of the inserted sound insulating plate 5 and screwing the nuts 32 and 42 of the pressing edge members 3f and 4f, the both end portions of the sound insulating plate 5 are located on the front side. The sound insulating plate 5 is mounted so as to be loosely held between the opposing surfaces of the hollow support frames 3b, 4b and the pressing edge members 3f, 4f so that the sound insulating plate 5 can expand and contract in the plate surface direction.
[0020]
At this time, the tips of the bolts 8A and 8B abut against the inner surfaces of the pressing rims 3f and 4f, and the bolts 8A and 8B are prevented from being screwed any further, so that the sound insulating plate side end insertion grooves 3d and 4d are not inserted. I keep a gap. When the sound insulating plate 5 expands and contracts due to heat, the expansion and contraction allowance is reduced by the gap between the hole wall of the horizontally long hole 7 having a larger diameter than the bolts 8A and 8B and the outer peripheral surfaces of the bolts 8A and 8B. It is formed so as to be absorbed.
[0021]
Further, the bolt fixing plate portions 3e, 4e having a certain width protruding outward from the front hollow support frame portions 3b, 4b of the vertical frame members 3, 4 on both sides are provided at the center in the width direction. In addition, bolt mounting holes 9A and 9B are provided at predetermined intervals in the length direction, and locking grooves 10A and 10B are provided at outer ends of the bolt fixing plate portions 3e and 4e, respectively. At the rear ends of the outer plate portions 3a, 4a of the vertical frame members 3, 4, projecting portions 11A, 11B having a small width project outward. The locking pieces 13A, 13B formed on the front end edges of the cover members 12A, 12B having an L-shaped cross section are locked in the locking grooves 10A, 10B, respectively, and the rear plates of the cover members 12A, 12B are formed. The inner ends of the parts are superimposed on the rear surfaces of the protruding pieces 11A and 11B and fixed by screws 14A and 14B, so that the rear surfaces of the bolt fixing plates 3e and 4e are entirely covered by the cover members 12A and 12B, respectively. Bolts 15A, 15B for covering and fixing the bolt fixing plates 3e, 4e of the vertical frame members 3, 4 on both sides to the columns B, B through the bolt mounting holes 9A, 9B are concealed.
[0022]
On the other hand, in the upper and lower horizontal frame members 1 and 2 which form the rectangular frame of the sound insulation panel A together with the vertical frame members 3 and 4 on both sides, as shown in FIG. And a hollow for holding the upper and lower ends of the sound insulation plate 5 together with the wall surfaces 1A and 2A by applying to the rear surfaces of the upper and lower ends of the sound insulation plate 5. Pressing edge members 16A and 16B are provided, respectively, and these upper and lower pressing edge members 16A and 16B are detachably fixed to the rear portions of the upper and lower horizontal frame members 1 and 2 by bolts 17A and 17B, respectively. Further, in the upper horizontal frame member 1, a plurality of bolt insertion holes 18 are provided at regular intervals in the length direction (the width direction of the sound insulating plate 5) on the front surface of the hollow pressed edge member 16A, and each of these bolts is provided. A nut body 19 is fixed in the pressing rim 16A so as to communicate with the insertion hole 18.
[0023]
Further, a bolt insertion hole 6 is provided at an upper end portion of the sound insulation plate 5 at regular intervals in the width direction of the sound insulation plate 5, a bolt 21 is inserted through each of the bolt insertion holes 6, and a tip end thereof is screwed into the nut body 19. By tightening, the upper end portion of the sound insulating plate 5 is fixed to the upper horizontal frame member 1 by the plurality of bolts 21 via the pressing edge member 16A. The lower end of the sound insulating plate 5 is only sandwiched between the wall surface portion 2A of the lower horizontal frame member 2 and the hollow pressing edge member 16B, and no bolt insertion hole is formed.
[0024]
Before the sound insulating plate 5 is stretched over the rectangular frame formed by the upper and lower horizontal frame materials 1 and 2 and the vertical frame materials 3 and 4 on both sides, the above-mentioned pressing edge material is previously attached to the rear surface of the upper end portion of the sound insulating plate 5. 16A is mounted and fixed with a plurality of bolts 21 as described above. Thereafter, the upper and lower ends of the front surface of the sound insulating plate 5 are applied to the wall surfaces 1A and 2A of the upper and lower horizontal frame members 1 and 2 and Both end portions are inserted into insertion grooves 3d and 4d formed on the opposing surfaces of the vertical frame members 3 and 4, respectively. On the upper and lower horizontal frame members 1 and 2, the upper and lower pressing edge members 16A and 16B are inserted. It is fixed to the rear lower surface of the upper and lower horizontal frame members 1 and 2 by bolts 17A and 17B.
[0025]
On the other hand, on both sides of the vertical frame members 3 and 4, the pressing edge members 3 f and 4 f are respectively placed on the rear surfaces of both end portions of the sound insulating plate 5, and the outer end surfaces of these pressing edge members 3 f and 4 f are vertically positioned on both sides. For example, a bolt is inserted from the inside of the pressing edge members 3f, 4f and screwed into the rear hollow supporting portions 3c, 4c in a state of being in contact with the inner side surfaces of the rear hollow supporting portions 3c, 4c of the frame members 3, 4. 4c. Then, the bolt insertion holes 31 and 41 provided in the pressing edge members 3f and 4f are provided in the respective laterally elongated holes 7 provided in both end portions of the sound insulating plate 5 and the bolt insertion holes provided in the front hollow support portions 3b and 4b. The bolts 8A, 8B are inserted through the bolt insertion holes 33, 43 from the front side of the front hollow support portions 3b, 4b, respectively. Are screwed into the nut bodies 32, 42 fixed in the pressing rims 3f, 4f, so that both ends of the sound insulating plate 5 are connected to the front hollow support portions 3b, 4b and the pressing rims 3f, 4f. And fixed to the vertical frame members 3 and 4 on both sides. At this time, the sound insulating plate 5 is sandwiched between the front hollow support portions 3b, 4b and the pressing edge members 3f, 4f in a state in which the sound insulating plate 5 is lightly touched so as not to hinder the thermal expansion and contraction or with a slight gap. In the state. The upper end openings of the vertical frame members 3 and 4 are sealed by a removable cap body 22 as shown in FIG.
[0026]
The sound insulation panel A configured as described above is installed between the adjacent columns B, B of the columns B, B,... Made of H-section steel standing at regular intervals along the edge of the highway or the like. With the cover members 12A, 12B covering the bolt fixing plates 3e, 4e on both sides of the sound insulation panel A removed, the bolt fixing plates 3e, 4e on both sides are fixed to the flanges B1 on the columns B, B. , B1 and the bolt mounting holes 9A, 9B provided in the bolt fixing plate portions 3e, 4e are the same as the bolt mounting holes 9A, 9B in the longitudinal direction in the flange portions B1, B1 in advance. The bolts 15A, 15B are inserted through the bolt mounting holes 9A, 9B from the bolt mounting holes 9A, 9B, respectively, and the bolts project from the bolt mounting holes b on the support B side. 15A, 15 It is performed by screwing the nut 23 to. After the sound insulation panel A is stretched and constructed between the columns B, B, the cover members 12A, 12B are mounted on both side bolt fixing plates 3e, 4e, respectively, to cover the bolts 15A, 15B.
[0027]
A sound insulation wall is constructed by sequentially performing such a construction work of the sound insulation panel A so that a plurality of sound insulation panels A are stacked in the length direction between the flange portions B1 and B1 of the adjacent columns B and B. Things.
[0028]
In the sound insulation panel A thus constructed, since the sound insulation plate 5 is made of a polycarbonate resin plate that is greatly expanded and shrunk by heat, it expands and contracts due to a temperature difference between winter and summer, but the sound insulation plate 5 has only its upper end. Only the bolts 21 are firmly fixed to the pressing edge material 16A of the upper horizontal frame material 1, but the lower end is not fixed by bolts, etc., and both ends are vertical frame materials on both sides as described above. Even if the front hollow support portions 3b, 4b and the pressing edge members 3f, 4f are attached by bolts 8A, 8B in the sandwiched state, the sandwiched state does not hinder the thermal expansion and contraction of the sound insulating plate 5. The sound insulation plate 5 has a length which is in a state where the sound insulation plate 5 is provided between the elongated holes 7 through which the bolts 8A and 8B are inserted and the bolts 8A and 8B. direction It can be freely expanded and contracted in the width direction.
[0029]
When a vehicle collides with the sound insulating plate 5 of the sound insulating panel A, the sound insulating plate 5 firstly moves on the front side until the horizontally long holes 7, 7,... Provided on both side ends thereof contact the bolts 8A, 8B. That is, it bends toward the outside of the road, absorbs and reduces the impact force by this deformation, and prevents the sound insulating plate 5 from coming out of the vertical frame members 3, 4 by the bolts 8A, 8B.
[0030]
When the sound insulating plate 5 is bent and deformed by the impact force and the elongated holes 7, 7 contact the bolts 8A, 8B, the impact force acts on the bolts 8A, 8B via the elongated holes 7, 7. At this time, as shown in FIG. 5, assuming that a point at which the automobile collides with the sound insulating plate 5 is O, the horizontally long holes 7 provided at both end portions of the sound insulating plate 5 are drawn toward the collision point O. The sound insulating plate 5 is bent and deformed. The bolts 8A and 8B abut against the outer side wall of the upper long side of the horizontally long hole 7 with respect to the horizontally long hole 7 provided above the collision point O, and are located below the collision point O. The bolts 8A and 8B are in contact with the outer side wall of the lower long side of the horizontally long hole 7 with respect to the horizontally long hole 7 provided in.
[0031]
In this state, the direction in which the oblong hole 7 is drawn toward the collision point O by the bending deformation of the sound insulating plate 5 is the direction of the straight line R connecting the collision point O and the center of the bolt 8A or 8B inserted into the oblong hole 7. The tangent line L in the hole wall on the long side of the bolt contact side of the horizontally long hole 7 where the straight line R intersects is inclined with respect to the straight line R.
[0032]
On the outer end side of the elongated hole 7, the angle between the tangent L and the straight line R is an obtuse angle. Therefore, when the elongated hole 7 is pulled toward the collision point O in the direction of the straight line R, the bolt 8A or 8B relatively moves on the tangent line L toward the outer end of the horizontally long hole 7 while being in contact with the long side wall wall of the horizontally long hole 7, so that the sound insulating plate 5 further bends and deforms to generate impact force. When the bolt 8A or 8B reaches the curved wall surface at the outer end of the horizontally long hole 7, further movement is prevented, and the impact force is released from the bolts 8A and 8B from the vertical frame members 3 and 4 on both sides. Are firmly received by the supports B, B through the support.
[0033]
As described above, since the sound insulating plate 5 moves, the distance in which the bolts 8A and 8B move until the bolts 8A and 8B contact the hole wall of the horizontally long hole 7 is short, and the impact applied to the hole wall does not increase. Even when received at the right end, not so large impact force is applied, and no crack is generated in the horizontally long hole 7.
[0034]
【The invention's effect】
As described above, according to the sound insulation panel of the present invention, as described in claim 1, a sound insulation plate made of a light-transmitting resin is attached to a rectangular frame formed by the upper and lower horizontal frame members and the vertical frame members on both sides. The sound insulation panel has a structure in which an upper end except for a lower end and both side ends are respectively attached to an upper horizontal frame member and both vertical frame members by a plurality of bolts and nuts. In this structure, the upper end of the sound insulating plate is fixed to the upper horizontal frame member with the above-mentioned bolts and nuts, while, on both side ends of the sound insulating plate, horizontally long holes are vertically formed on both side ends thereof. Are provided at regular intervals in the direction, and a bolt having a smaller diameter than the shorter diameter of the elongated hole is inserted into the elongated hole, and both ends of the sound insulating plate are moved by the nut to the longitudinal frame material on both sides in the plate surface direction. As it is installed as loosely as possible, it is possible to expand and contract Or resiliently deformed shape sound insulating plate wavy and capacity, cracks can be prevented from occurring.
[0035]
Furthermore, as described above, since both ends of the sound insulating plate are attached to the vertical frame members on both sides of the rectangular frame by a plurality of bolts and nuts, even if an automobile or the like collides with the sound insulating plate of the sound insulating panel. In addition, it is possible to reliably prevent the sound insulating plate from separating from the vertical frame members on both sides due to the impact force.
[0036]
The holes provided at both end portions of the sound insulating plate are oblong holes formed by an oblong hole or an elliptical hole whose major axis direction is directed to the width direction of the sound insulating plate. At this time, both side ends of the sound insulating plate are drawn toward the place where the impact force is received, but the hole wall portion where the bolt abuts in the direction in which the sound is drawn is always inclined, so that the bolt and the hole Even after contact with the wall, the bolt slides toward the end of the elongated hole while pressing against the hole wall, absorbing and attenuating the impact force during that time, and can exhibit excellent buffering action. Cracking of the sound insulating plate can be prevented.
[0037]
According to the third aspect of the invention, the vertical frame members on both sides of the sound insulating panel have a front support having a constant inward width at the front and rear portions on the inner surface of the outer plate having a constant width in the front and rear direction. A frame portion and a rear support frame portion having a smaller projecting width than the front support frame portion are respectively protruded, and an insertion groove for receiving a side end portion of the sound insulating plate is provided between opposing surfaces of the front and rear support frame portions. Since the both sides of the sound insulating plate are inserted into the insertion grooves on both sides, the sound insulating plate can be arranged at a simple and accurate position, and furthermore, the protruding end surface of the rear support frame portion. The pressing edge material and the protruding end of the front support frame are connected to each other by bolts and nuts through a horizontally long hole provided at the side end of the sound insulating plate inserted into the insertion groove. The mounting structure is capable of expanding and contracting both ends of the sound insulation plate on the vertical frame material on both sides. It can be easily mounted such that.
[0038]
Further, according to the invention according to claim 4, a fixing plate portion having a constant width projects outwardly from the front end surface of the outer plate portion on both side vertical frame members of the sound insulation panel, and the fixing plate is provided. Since the portion is configured to be fixed to the column by bolts and nuts, the work of attaching the sound insulation panel to the column can be performed reliably and efficiently from the road side.
[Brief description of the drawings]
FIG. 1 is a simplified perspective view of a sound insulation panel viewed from the front side,
FIG. 2 is a simplified perspective view of a sound insulating plate,
FIG. 3 is a cross-sectional view in which a part of a state of being attached between columns is omitted.
FIG. 4 is a central longitudinal side view in which an intermediate portion of the sound insulating panel is omitted.
FIG. 5 is a partial front view of the sound insulating plate for explaining the operation when receiving an impact.
[Explanation of symbols]
1, 2 upper and lower horizontal frame members 3, 4 both side vertical frame members 3a, 4a outer plate portions 3b, 4b front hollow support frame portions 3c, 4c rear hollow support frame portions 3d, 4d insertion grooves 3f, 4f press edge material 5 sound insulation Plate 6 Bolt mounting hole 7 Horizontal holes 8A, 8B Bolt

Claims

A sound insulation panel in which a sound insulation plate made of a translucent resin is stretched over a rectangular frame formed by upper and lower horizontal frame members and both side vertical frame members, and the sound insulation plate has an upper end and both sides excluding a lower end thereof. It has a structure in which the ends are respectively attached to the upper horizontal frame material and both vertical frame materials by a plurality of bolts and nuts. In this structure, the upper end of the sound insulation plate is attached to the upper horizontal frame material as described above. On the other hand, the sound insulation plate is fixed with bolts and nuts, and on both side ends, horizontally long holes are provided at regular intervals in the both ends at a certain interval in the vertical direction. A sound-insulating panel, characterized in that both ends of the sound-insulating plate are attached to both vertical frame members so as to be movable in the direction of the plate surface by inserting small-diameter bolts and nuts.

2. The sound insulation panel according to claim 1, wherein the horizontally long holes provided at both end portions of the sound insulation plate are oval holes or elliptical holes. 3.

The longitudinal frame members on both sides are a front support frame portion having a constant inward width toward the inner side front and rear portions of an outer plate portion having a constant width in the front and rear direction, and a rear side having a smaller protrusion width than the front support frame portion. A supporting frame portion is provided so as to project therefrom, and an insertion groove for receiving a side end portion of the sound insulating plate is provided between facing surfaces of the front and rear supporting frame portions, and a pressing edge is formed on a protruding end surface of the rear supporting frame portion. It is characterized in that bolts and nuts are connected between the pushing edge material and the protruding end of the front support frame portion through a horizontally long hole provided at the side end of the sound insulating plate inserted into the insertion groove. The sound insulation panel according to claim 1 or 2, wherein

A fixing plate portion having a constant width is protruded outward from the front end surface of the outer plate portion on both side vertical frame members, and the fixing plate portion is fixed to the column with bolts and nuts. The sound insulation panel according to claim 1, 2 or 3, wherein: