JP3920706B2

JP3920706B2 - Louver mounting structure and mounting brackets on the underside of girders such as elevated roads

Info

Publication number: JP3920706B2
Application number: JP2002155985A
Authority: JP
Inventors: 隆司吉村; 雅治藤澤; 徳二大塩
Original assignee: Nippon Steel and Sumikin Metal Products Co Ltd
Current assignee: Nippon Steel Metal Products Co Ltd
Priority date: 2002-05-29
Filing date: 2002-05-29
Publication date: 2007-05-30
Anticipated expiration: 2022-05-29
Also published as: JP2003342918A

Description

【０００１】
【発明の属する技術分野】
この発明は、高架道路等の桁下裏面の小梁へルーバーをボルトで取り付けるボルト貫通型の取付構造、及び前記の取付構造に好適に使用されるルーバー取付金具の技術分野に属する。
【０００２】
【従来の技術】
従来、高架道路等の桁下裏面の小梁へルーバーをボルトで取り付けるための取付構造、及びその取付構造に使用される取付金具については、種々公知であり実施もされている。例えば、
（１）実公平７−３２５８１号公報、実開平７−１５８０７号公報及び特開平７−１８０１１８号公報の図１２、意匠登録第７９０２９４号公報の使用状態を示す参考図２などに、ルーバー上辺部の長手方向に形成した均等断面のスライド溝内に、上向きとした取付ボルトの頭を挿入して取付位置まで移動させ、高架道路等の桁下裏面の小梁へルーバーを取り付ける取付構造が開示されている。
（２）本出願人の特許第３１９６１３８号公報の図３と図４には、取付ボルトの下端に、ルーバー上辺の開口を形成するリップを止めるストッパが付設された取付金具、および該取付金具によるルーバーの取付構造が開示されている。但し、前記の取付金具では、取付ボルトとルーバーとの関係が非拘束でバラバラになる不都合があることに鑑みて、同公報の図９〜図１２には、仮止めワッシャを使用した取付金具と、これを使用したルーバーの取付構造が開示されている。取付ボルトへねじ込んだ仮止めワッシャをルーバーの上面へ引っ掛けることにより、取付ボルトとルーバーの関係を仮止め出来るのである。また、同じ公報の図１３には、前記の仮止めワッシャを使用しないルーバー取付構造を示している。下端にルーバーのリップを止めるストッパが付設されたボルトを予め小梁のフランジに設けたボルト孔へ先行して通し、上方からナットをねじ込み、同ナットによりボルトはフランジから長く吊り下げた状態としておく。ルーバーは、そのリップの間へ前記ストッパを入れて回転する要領でストッパへ吊り掛け、その後前記のナットを締め込んで取付を完成するのである。
【０００３】
【発明が解決しようとする課題】
上記（１）、（２）の各従来技術は、いずれもボルトを小梁のボルト孔へ通してルーバーを取り付ける、いわゆるボルト貫通型の取付構造であるから、取付状態の安定性は十分に高い。
【０００４】
しかし、上記従来技術（１）のように、上向きとした取付ボルトの頭をスライド溝内へ挿入して取付位置まで移動させて、小梁へルーバーを取り付ける構造の場合は、予め決まった個数の取付ボルトをスライド溝内へ挿入して所定位置に用意しておくことが作業上の大事な条件となる。作業途中でボルトの数が不足していることが判明してもボルトを追加することは困難な場合が多いし、また、余ったボルトを撤去することも難しいからである。このように、取付ボルトに関する作業上の段取りが狂うと、作業の進行が不具合になることは問題である。
【０００５】
その点、上記従来技術（２）は、取付ボルトの用意に関する段取りが少しぐらい狂っても、作業の進行にはさして困らない利点がある。しかし、ストッパをボルトの下端部へ付設する手段としては一般的に溶接が採用されるのであり、溶接工程の分だけ取付金具の製造単価が高くなり、競合者との価格競争に不利となる問題がある。まして、仮止めワッシャを使用するときは一層不利である。
【０００６】
価格面で云えば、上記従来技術（１）のように、ルーバー上辺部の長手方向に均等断面のスライド溝を形成することも、それなりにコストアップを避け難いから問題である。
【０００７】
本発明の目的は、製造単価が安く、軽量で、ルーバーの取付作業が容易、且つ至便なルーバー取付金具を提供することである。また、前記取付金具を使用することにより、取付ボルトに関する作業上の段取りに格別の条件を課されず、ルーバー取付作業が容易で効率的な高架道路等の桁下裏面へのルーバー取付構造を提供することである。
【０００８】
【課題を解決するための手段】
上述の課題を解決するための手段として、請求項１に記載した発明に係る高架道路等の桁下裏面へのルーバー取付構造は、
高架道路等の桁下裏面の小梁へルーバーを取り付けるための構造であって、
桁下裏面側に間隔をあけてほぼ水平に設置された複数の小梁と、前記小梁へ取り付ける複数のルーバーと、取付金具とで構成され、
小梁は下部に水平方向のフランジを備え、同フランジのルーバー取付位置にボルト孔を有していること、
ルーバーは垂直断面が中空構造であり、その上辺中央部の長手方向に平行な開口部を有し、この開口部の口縁に下向きのリップを備えていること、
取付金具は金具と取付ボルトから成り、金具の上面が平坦な中央部の両側に前記ルーバーの下向きのリップを受け止める受け溝部が形成されており、前記中央部にボルト孔が設けられ、同中央部の下面には前記ボルト孔へ通した取付ボルトの頭を回転しないように拘束する間隔をあけて両側に拘束壁が形成され、同拘束壁の下端部内側には前記取付ボルトの頭を通すことは可能であるが抜き難い鉤部が前記取付ボルトの頭の高さに相当する位置に形成されており、取付ボルトは金具中央部の前記ボルト孔へ通され、その頭は拘束壁と鉤部にて支持されていること、
ルーバーは小梁に対して直交する方向に配置され、その上辺が小梁のフランジ下面に当てがわれること、取付金具はその受け溝部にルーバーの下向きのリップを受け止め、取付ボルトをフランジのボルト孔へ上向きに通し、上方からナットをねじ込んで締結されていることを特徴とする。
【０００９】
請求項２に記載した発明は、請求項１に記載した高架道路等の桁下裏面へのルーバー取付構造において、取付ボルトの上端部近傍に直径線方向のピン孔が設けられており、ナットをねじ込んで締結し、更にボルトの前記ピン孔へ止めピンが通されていることを特徴とする。
【００１０】
請求項３に記載した発明は、請求項１に記載した高架道路等の桁下裏面へのルーバー取付構造において、ルーバーには、所定の開口率を達成する小孔が多数設けられていることを特徴とする。
【００１１】
請求項４に記載した発明に係る高架道路等の桁下裏面へのルーバー取付金具は、金具と取付ボルトから成り、金具の上面が平坦な中央部の両側にルーバーの下向きのリップを受け止める受け溝部が形成されており、前記中央部にボルト孔が設けられ、同中央部の下面には前記ボルト孔へ通した取付ボルトの頭を回転しないように拘束する間隔をあけて両側に拘束壁が形成され、拘束壁の下端部内側に前記取付ボルトの頭を通すことは可能であるが抜き難い鉤部が前記取付ボルトの頭の高さに相当する位置に形成されており、取付ボルトは金具中央部の前記ボルト孔へ通され、その頭は拘束壁と鉤部にて支持されていることを特徴とする。
【００１２】
請求項５に記載した発明は、請求項４に記載した高架道路等の桁下裏面へのルーバー取付金具において、金具中央部の両側の受け溝部と下面の拘束壁並びにその下端部内側の鉤部は共通の中心線方向に均等断面に形成したアルミニューム押し出し又は引き抜き成形品を前記中心線と直角方向に裁断して形成されていることを特徴とする。
【００１３】
請求項６に記載した発明は、請求項４又は５に記載した高架道路等の桁下裏面へのルーバー取付金具において、金具中央部の両側の受け溝部は、Ｖ字形又はレ形状に形成されていることを特徴とする。
【００１４】
請求項７に記載した発明は、請求項４〜６のいずれか一に記載した高架道路等の桁下裏面へのルーバー取付金具において、取付ボルトの上端部近傍に直径線方向のピン孔が設けられており、ナットをねじ込んで締結した上に止めピンを差すことが可能であることを特徴とする。
【００１５】
【発明の実施形態】
以下に、図面を参照して、請求項１〜３に記載した発明に係る高架道路等の桁下裏面へのルーバー取付構造、及び請求項４〜７に記載した発明に係る取付金具の実施形態を説明する。
【００１６】
先ず図１と図２は取付金具の代表的な実施形態を示している。
【００１７】
この取付金具（請求項４に記載した発明）は、高架道路等の桁下裏面へ図３のようにルーバー１を取付けるためのもので、取付ボルト２と金具３とから成る。金具３は、上面が平坦な中央部３ａの両側にルーバー１のリップ１ａ、１ａを受け止める（支持する）受け溝部３ｂ、３ｂが形成されている。因みに図３のルーバー１は、その上辺中央部の長手方向に平行な開口部を有し、この開口部の両口縁に下向きのリップ１ａ、１ａを備えている。図１、図２の場合、金具３は、中央部３ａの両側の受け溝部３ｂ、３ｂの垂直断面が左右対称なＶ字形に形成され（請求項６に記載した発明）、同溝の最深部の間隔Ｓは、ルーバー１のリップ１ａ、１ａの間隔とほぼ等しく形成されている。ルーバー１の取付状態の安定性を確保するためである。
【００１８】
金具３の前記中央部３ａの中央位置にボルト孔３ｃが設けられている。一方、前記中央部３ａの下面には、前記ボルト孔３ｃへ通した取付ボルト２の頭２ａを回転しないように拘束する間隔Ｗをあけた両側位置に、拘束壁３ｆ、３ｆが平行に形成されている。各拘束壁３ｆの下端部内側には、前記取付ボルト２の頭２ａを通すことは可能であるが抜き難い内法間隔Ｔの鉤部３ｄが下向きに開口幅が拡大する傾斜面３ｅと共に左右対称な逆止め形状（矢印形状）に形成されている。
【００１９】
前記鉤部３ｄの内法間隔Ｔは、ボルトの頭２ａが六角形又は四角形のいずれであれ、拘束壁３ｆに当たって回転を止められる平行面同士の幅寸Ｕよりも少し小さい関係（Ｗ≧Ｕ≧Ｔ）で構成されている。しかも鉤部３ｄは、前記取付ボルト２の頭２ａの高さＨよりも少し深い位置Ｄ（Ｄ≧Ｈ）に形成されている。
【００２０】
要するに本発明の取付金具は、取付ボルト２が予め金具３の中央部３ａの前記ボルト孔３ｃへ通され、その頭２ａは両側の拘束壁３ｆ、３ｆと鉤部３ｄ、３ｄにて回転しないように拘束を受けた状態に支持され一体化されている。
【００２１】
金具３において上記Ｖ字形の受け溝部３ｂを形成した両腕部３ｈの先端縁には、中央部３ａの上面とほぼ面一で水平な圧接面部３ｇが一連に形成されている。また、取付ボルト２の上端部近傍の位置には直径線方向に貫通されたピン孔４が設けられており、上方から座金７と共にナット６をねじ込んで締結した上に、更にナット緩み止め手段としての止めピン５を差すことが可能に構成されている（請求項７に記載した発明）。
【００２２】
図１から明らかなように、図示例の金具３は、その中央部３ａと両側の受け溝部３ｂを形成する両腕部３ｈ、及び中央部下面の拘束壁３ｆ並びにその下端部内側の鉤部３ｄ、傾斜面３ｅなどが、共通な中心線の方向に均等断面に形成されており、例えば前記の均等断面で成形したアルミニューム押し出し又は引き抜き成形品を前記中心線と直角方向に所要の幅寸Ｙに裁断して形成されている（請求項５に記載した発明）。従って、この金具３は、裁断とボルト孔３ｃの加工を要するけれども、きわめて軽量であり、且つ安価に大量生産することに適しているのである。
【００２３】
次に、上記の取付金具を使用して、ルーバー１を、高架道路等の桁下裏面の小梁１０の下部フランジ１０ａの下面へ取り付ける構造の実施形態を、図３に基づいて説明する。
【００２４】
周知のとおり、高架道路等の桁下裏面には一定の間隔をあけてほぼ水平に複数の小梁１０が設置される。そこで、請求項１記載の発明に係るルーバー取付構造は、前記の小梁１０と、同小梁１０へ取り付ける複数のルーバー１…と、上記した取付金具とで構成される。
【００２５】
小梁１０は下部に水平方向のフランジ１０ａを備え、同フランジ１０ａのルーバー取付位置には予めボルト孔８を加工している。
【００２６】
図３に示したように、ルーバー１は垂直断面が中空構造であり、その上辺中央部には長手方向に平行な開口部を有しており、同開口部の両口縁に下向きのリップ１ａ、１ａを備えている。
【００２７】
取付金具は、上記した通り、金具３と取付ボルト２との組み合わせから成る。取付ボルト２は予め金具中央部３ａのボルト孔３ｃへ通され、同ボルト２の頭２ａは拘束壁３ｆと鉤部３ｄにより回転しないように拘束して支持され、両者は一体化されている。したがって、この取付金具は、使用者が手に持った際の安定性に優れ、使用者はルーバー取付作業に集中できて好都合である。
【００２８】
ルーバー１は小梁１０の長手方向に対して直交する向きに配置され、その上辺が小梁１０における下部フランジ１０ａの下面に当てがわれる。上記の取付金具は、金具３の両側の受け溝部３ｂ、３ｂにルーバー１の下向きのリップ１ａ、１ａを受け止めた上で、その取付ボルト２をフランジ１０ａのボルト孔８へ上向きに通し、上方からナット６を座金７と共にねじ込んで締結される。かくすると、金具３の両側の受け溝部３ｂ、３ｂの最深部に両側のリップ１ａ、１ａが安定に納まって横ズレすることは決してないから、ルーバー１の取付状態が安定している。しかもルーバー１の取付間隔は、小梁１０に予め工場などで加工されたボルト孔８のピッチに準拠して正確なものとなる。
【００２９】
上記のルーバー取付作業を容易にするため、金具３の横幅Ｙ（図１を参照＝上述した裁断の幅）は、ルーバー１の開口部における下向きのリップ１ａ、１ａの間隔（図２、図３中の間隔Ｓを参照）よりも十分小さい寸法で構成されている。したがって、ルーバー１の取付作業に際しては、同ルーバー１のボルト止め位置において金具３の前記横幅Ｙをルーバー１の開口部の長手方向に沿う配置とし、その両口縁の間に下ろしてゆく。そして、下向きのリップ１ａ、１ａより深く入った位置で約９０度回転して両側の受け溝部３ｂ、３ｂにリップ１ａ、１ａを受け止めさせる要領で使用する。したがって、取付金具をルーバー１のボルト止め位置に予め用意するような段取りは一切無用であり、ルーバー取付作業の遂行を円滑に自在に行うことが出来る。
【００３０】
上記したようにナット６を座金７と共にねじ込んでルーバー１を小梁１０のフランジ１０ａへ締結した後の作業として、図１に示したように取付ボルト２の上端部近傍に予め設けておいた直径線方向のピン孔４へ止めピン５を通してナット６の万が一の緩み事故を未然に防止することも行う（請求項２に記載した発明）。もっとも、図３には止めピン５の図示を省略した。
【００３１】
また、図３の図示では明瞭でないが、ルーバー１には、その両側面と底面のほぼ全面にわたり、所定の開口率（通例３０％から８０％）を達成する小孔が多数設けられている（請求項３に記載した発明）。
【００３２】
図４〜図７には、取付金具を構成する金具３の異なる実施例を示している。以下これらを間単に説明する。
【００３３】
先ず図４は、図１、図２の金具３とほぼ同一の構成であるが、受け溝部３ｂを形成した両腕部３ｈの先端縁に水平な圧接面部（３ｇ）を持たない構成である。
【００３４】
図５に示す金具は、垂直な拘束壁３ｆの下端部から斜め上方へ立ち上がる腕部３ｈによりレ形状の受け溝部３ｂ（請求項６に記載した発明）を形成した実施例を示している。レ形状の受け溝部３ｂにも、上記Ｖ字形の受け溝部３ｂと同様な作用、効果を期待できる。両腕部３ｈの先端縁に水平な圧接面部３ｇを設けるか否かは設計事項である。
【００３５】
図６に示す金具は、垂直な拘束壁３ｆの下端部から斜め上方へ立ち上がる腕部３ｈを設けてレ形状の受け溝部３ｂを形成した点までは図５の実施例と共通するが、同腕部３ｈの上方部に垂直に立ち上がる部分３ｋを形成した点が異なる。
【００３６】
図７に示す金具は、両側の拘束壁３ｆの途中位置から外方に腕部３ｈを突き出して矩形状の受け溝部３ｂを形成した実施例を示している。
【００３７】
【発明の効果】
請求項４〜７に記載した発明に係るルーバー取付金具は、取付ボルト２が金具３のボルト孔３ｃへ通され、その頭２ａは拘束壁３ｆと鉤部３ｄとによって回転しないように支持され一体化されているから、これを使用者が手に持った際の安定性に優れ、ルーバー取付作業に集中できる。したがって、ルーバー取付作業を容易にでき、その作業効率を高めることができる。また、この取付金具は軽量であり、安価に提供できる。ルーバー１の取付け作業に対する段取りに自在性と融通性があり、ルーバーのボルト止め位置に予め用意する等の段取りも無用であるから、その意味でも、ルーバー取付作業を容易にでき、その作業効率を高めることができる。
【００３８】
請求項１〜３に記載した発明に係る高架道路等の桁下裏面へのルーバー取付構造は、上記の取付金具を使用して実施するので、同取付金具が軽量で、しかも安価であるという利点をそのままルーバー取付構造の結果に反映させることができる。そして、ルーバー取付作業を容易にでき、その作業効率を高めることができるのである。
【図面の簡単な説明】
【図１】本発明に係る取付金具の実施形態を示した斜視図である。
【図２】取付金具の主要部を拡大して示した正面図である。
【図３】ルーバー取付構造を示した正面図である。
【図４】金具の異なる実施形態を示した正面図である。
【図５】金具の異なる実施形態を示した正面図である。
【図６】金具の異なる実施形態を示した正面図である。
【図７】金具の異なる実施形態を示した正面図である。
【符号の説明】
１０小梁
１ルーバー
１０ａフランジ
８ボルト孔
１ａリップ
３金具
２取付ボルト
３ａ金具の中央部
３ｂ受け溝部
３ｃボルト孔
３ｆ拘束壁
６ナット
４ピン孔
５止めピン[0001]
BACKGROUND OF THE INVENTION
The present invention belongs to the technical field of a bolt-through type mounting structure in which a louver is attached to a small beam on the underside of a girder such as an elevated road with a bolt, and a louver mounting bracket suitably used in the mounting structure.
[0002]
[Prior art]
Conventionally, various mounting structures for mounting a louver to a small beam on the underside of a girder such as an elevated road with bolts and mounting brackets used in the mounting structure are known and practiced. For example,
(1) The upper side of the louver is shown in FIG. 12 of Japanese Utility Model Publication No. 7-32581, Japanese Utility Model Laid-Open No. 7-15807 and Japanese Patent Application Laid-Open No. 7-180118, Reference FIG. 2 showing the state of use of Design Registration No. 790294, etc. A mounting structure is disclosed in which the head of an upward mounting bolt is inserted into a slide groove having an equal cross section formed in the longitudinal direction of the inner wall and moved to the mounting position, and the louver is attached to a small beam on the back surface of the underside of an elevated road or the like. ing.
(2) In FIGS. 3 and 4 of the applicant's patent No. 3196138, there is provided a mounting bracket in which a stopper for stopping a lip forming an opening on the upper side of the louver is attached to the lower end of the mounting bolt, and the mounting bracket. A louver mounting structure is disclosed. However, in view of the disadvantage that the relationship between the mounting bolt and the louver is unconstrained and disjoint in the mounting bracket described above, FIGS. 9 to 12 of the same publication include mounting brackets using temporary fixing washers. A louver mounting structure using the same is disclosed. The relationship between the mounting bolt and the louver can be temporarily fixed by hooking the temporary fixing washer screwed onto the mounting bolt onto the upper surface of the louver. Further, FIG. 13 of the same publication shows a louver mounting structure that does not use the temporary fixing washer. A bolt with a stopper attached to the lower end to stop the lip of the louver is passed in advance through the bolt hole provided in the flange of the beam, and the nut is screwed from above, and the bolt is suspended from the flange for a long time. . The louver is hung on the stopper in such a manner that the stopper is inserted between the lips and rotated, and then the nut is tightened to complete the mounting.
[0003]
[Problems to be solved by the invention]
Each of the prior arts (1) and (2) above is a so-called bolt-through mounting structure in which a louver is mounted by passing a bolt through a bolt hole of a small beam, so that the stability of the mounting state is sufficiently high. .
[0004]
However, as in the case of the prior art (1), in the case of a structure in which the head of an upward mounting bolt is inserted into the slide groove and moved to the mounting position to mount the louver to the beam, a predetermined number of Inserting the mounting bolt into the slide groove and preparing it at a predetermined position is an important work condition. This is because it is often difficult to add bolts even if the number of bolts is found to be insufficient during the work, and it is also difficult to remove the remaining bolts. As described above, when the work setup related to the mounting bolt is out of order, it is a problem that the progress of the work becomes defective.
[0005]
In that respect, the above-described conventional technique (2) has an advantage that even if the setup related to the preparation of the mounting bolt is slightly out of order, the work is not troubled. However, welding is generally used as a means to attach the stopper to the lower end of the bolt, and the manufacturing cost of the mounting bracket is increased by the welding process, which is disadvantageous for price competition with competitors. There is. Moreover, it is more disadvantageous when using a temporary washer.
[0006]
In terms of price, it is also a problem to form a slide groove having a uniform cross section in the longitudinal direction of the upper side of the louver as in the prior art (1) because it is difficult to avoid an increase in cost.
[0007]
An object of the present invention is to provide a louver mounting bracket that is inexpensive, inexpensive, easy to mount louvers, and convenient. In addition, by using the mounting bracket, a louver mounting structure is provided on the underside of a girder such as an elevated road that does not impose special conditions on work setup related to mounting bolts and is easy and efficient for louver mounting. It is to be.
[0008]
[Means for Solving the Problems]
As means for solving the above-mentioned problem, the louver mounting structure to the underside of the underside of an elevated road or the like according to the invention described in claim 1 is:
It is a structure for attaching a louver to a small beam on the underside of a girder such as an elevated road,
It is composed of a plurality of small beams installed almost horizontally with a gap on the back side under the girders, a plurality of louvers attached to the small beams, and mounting brackets,
The small beam has a horizontal flange at the bottom, and has a bolt hole at the louver mounting position of the flange,
The louver has a hollow structure in the vertical cross section, has an opening parallel to the longitudinal direction of the center of the upper side, and has a downward lip on the mouth edge of the opening,
The mounting bracket is composed of a bracket and a mounting bolt, and a receiving groove portion for receiving the downward lip of the louver is formed on both sides of the center portion where the upper surface of the bracket is flat, and a bolt hole is provided in the center portion. A constraining wall is formed on both sides of the lower surface of the constraining wall so that the head of the mounting bolt passed through the bolt hole is constrained so as not to rotate, and the head of the mounting bolt is passed inside the lower end of the constraining wall. A hook that is possible but difficult to remove is formed at a position corresponding to the height of the head of the mounting bolt, the mounting bolt is passed through the bolt hole in the center of the bracket, and the head is the restraint wall and the hook Supported by
The louver is arranged in a direction perpendicular to the beam, and the upper side of the louver is applied to the lower surface of the flange of the beam. The mounting bracket receives the downward lip of the louver in the receiving groove, and the mounting bolt is inserted into the flange bolt hole. It is characterized by being screwed and tightened from above.
[0009]
According to a second aspect of the present invention, in the louver mounting structure on the underside of an elevated road or the like described in the first aspect, a pin hole in the diameter line direction is provided near the upper end of the mounting bolt, It is characterized in that it is screwed and fastened, and a stop pin is passed through the pin hole of the bolt.
[0010]
According to a third aspect of the present invention, in the louver attaching structure to the underside of a girder such as an elevated road described in the first aspect, the louver is provided with a large number of small holes for achieving a predetermined opening ratio. Features.
[0011]
The louver mounting bracket on the underside of the girder of an elevated road or the like according to the invention described in claim 4 comprises a bracket and a mounting bolt, and a receiving groove portion for receiving a downward lip of the louver on both sides of a central portion where the upper surface of the bracket is flat Bolt holes are provided in the central portion, and constraining walls are formed on both sides of the lower surface of the central portion with an interval for restraining the heads of the mounting bolts passed through the bolt holes from rotating. The head of the mounting bolt can be passed inside the lower end of the restraint wall, but a hook that is difficult to remove is formed at a position corresponding to the height of the head of the mounting bolt. The head is passed through the bolt hole, and its head is supported by a restraint wall and a collar.
[0012]
The invention described in claim 5 is the louver mounting bracket on the underside of the undercarriage of the elevated road or the like described in claim 4, wherein the receiving groove portion on both sides of the center portion of the bracket, the restraining wall on the lower surface, and the flange on the inner side of the lower end portion thereof Is characterized in that it is formed by cutting an aluminum extruded or pultruded product formed in a uniform cross section in a common center line direction in a direction perpendicular to the center line.
[0013]
According to a sixth aspect of the present invention, in the louver mounting bracket on the underside of the elevated road or the like described in the fourth or fifth aspect, the receiving groove portions on both sides of the central portion of the bracket are formed in a V shape or a re-shape. It is characterized by being.
[0014]
According to a seventh aspect of the present invention, in the louver mounting bracket on the underside of the elevated road or the like according to any one of the fourth to sixth aspects, a pin hole in the diameter line direction is provided near the upper end of the mounting bolt. It is characterized in that it is possible to insert a set pin after screwing in a nut and fastening it.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, referring to the drawings, a louver mounting structure on the underside of a girder such as an elevated road according to the invention described in claims 1 to 3, and an embodiment of a mounting bracket according to the invention described in claims 4 to 7 Will be explained.
[0016]
First, FIG. 1 and FIG. 2 show a typical embodiment of a mounting bracket.
[0017]
This mounting bracket (invention described in claim 4) is for mounting the louver 1 on the underside of an underpass such as an elevated road as shown in FIG. The metal fitting 3 is formed with receiving groove portions 3b and 3b for receiving (supporting) the lips 1a and 1a of the louver 1 on both sides of the central portion 3a having a flat upper surface. Incidentally, the louver 1 in FIG. 3 has an opening parallel to the longitudinal direction of the central portion of the upper side, and is provided with downward lips 1a and 1a at both mouth edges of the opening. In the case of FIGS. 1 and 2, the metal fitting 3 is formed in a V-shape in which the vertical cross sections of the receiving groove portions 3b and 3b on both sides of the central portion 3a are symmetrical (the invention described in claim 6), and the deepest portion of the groove Is formed to be substantially equal to the interval between the lips 1 a and 1 a of the louver 1. This is to ensure the stability of the attached state of the louver 1.
[0018]
A bolt hole 3 c is provided at the central position of the central portion 3 a of the metal fitting 3. On the other hand, on the lower surface of the central portion 3a, constraining walls 3f and 3f are formed in parallel on both sides of the mounting bolt 2 passing through the bolt hole 3c so as to prevent the head 2a from rotating. ing. Inside the lower end of each restraint wall 3f, the head 2a of the mounting bolt 2 can be passed, but the flange 3d having an internal spacing T that is difficult to remove is symmetrical with the inclined surface 3e whose opening width increases downward. It is formed in a non-return shape (arrow shape).
[0019]
The internal spacing T of the flange 3d is a little smaller than the width dimension U between the parallel surfaces that can stop rotating by hitting the restraint wall 3f, regardless of whether the bolt head 2a is hexagonal or rectangular (W ≧ U ≧ T). Moreover, the flange 3d is formed at a position D (D ≧ H) that is slightly deeper than the height H of the head 2a of the mounting bolt 2.
[0020]
In short, in the mounting bracket of the present invention, the mounting bolt 2 is passed through the bolt hole 3c in the central portion 3a of the bracket 3 in advance so that the head 2a does not rotate at the restraining walls 3f and 3f and the flange portions 3d and 3d on both sides. It is supported and integrated in a state of being restrained by.
[0021]
A series of pressure contact surface portions 3g that are substantially flush with the upper surface of the central portion 3a are formed at the tip edges of both arm portions 3h in the metal fitting 3 where the V-shaped receiving groove portions 3b are formed. Further, a pin hole 4 penetrating in the diameter line direction is provided at a position in the vicinity of the upper end portion of the mounting bolt 2, and a nut 6 is screwed together with a washer 7 from the upper side and fastened, and further as means for preventing nut loosening. The stop pin 5 can be inserted (the invention described in claim 7).
[0022]
As is apparent from FIG. 1, the metal fitting 3 in the illustrated example includes a central portion 3a and both arm portions 3h forming receiving groove portions 3b on both sides, a constraining wall 3f on the lower surface of the central portion, and a flange portion 3d inside the lower end portion thereof. The inclined surface 3e is formed in a uniform cross section in the direction of a common center line. For example, an aluminum extrusion or pultruded product formed in the uniform cross section has a required width dimension Y in a direction perpendicular to the center line. (Invention described in claim 5). Therefore, the metal fitting 3 requires cutting and processing of the bolt hole 3c, but is extremely lightweight and suitable for mass production at low cost.
[0023]
Next, an embodiment of a structure in which the louver 1 is attached to the lower surface of the lower flange 10a of the small beam 10 on the underside of the undercarriage such as an elevated road using the above-described mounting bracket will be described with reference to FIG.
[0024]
As is well known, a plurality of small beams 10 are installed almost horizontally at regular intervals on the underside of an underpass such as an elevated road. Therefore, the louver mounting structure according to the first aspect of the present invention includes the small beam 10, a plurality of louvers 1 attached to the small beam 10, and the mounting bracket described above.
[0025]
The small beam 10 is provided with a horizontal flange 10a at the bottom, and a bolt hole 8 is processed in advance at a louver mounting position of the flange 10a.
[0026]
As shown in FIG. 3, the louver 1 has a hollow structure in the vertical cross section, and has an opening parallel to the longitudinal direction at the center of the upper side, and downward lips 1a at both mouth edges of the opening. 1a.
[0027]
The mounting bracket is composed of a combination of the bracket 3 and the mounting bolt 2 as described above. The mounting bolt 2 is passed in advance through the bolt hole 3c in the central part 3a of the metal fitting, and the head 2a of the bolt 2 is restrained and supported by the restraining wall 3f and the flange 3d so as to be integrated. Therefore, this mounting bracket is excellent in stability when the user holds it in his / her hand, and the user can conveniently concentrate on the louver mounting work.
[0028]
The louver 1 is arranged in a direction orthogonal to the longitudinal direction of the small beam 10, and its upper side is applied to the lower surface of the lower flange 10 a in the small beam 10. The mounting bracket receives the downward lip 1a, 1a of the louver 1 in the receiving grooves 3b, 3b on both sides of the bracket 3, and then passes the mounting bolt 2 upward into the bolt hole 8 of the flange 10a. The nut 6 is screwed together with the washer 7 and fastened. In this way, since the lips 1a and 1a on both sides are stably stored in the deepest portions of the receiving grooves 3b and 3b on both sides of the metal fitting 3 and never shift laterally, the mounting state of the louver 1 is stable. Moreover, the mounting interval of the louvers 1 is accurate in accordance with the pitch of the bolt holes 8 that have been processed in advance in the small beam 10 at a factory or the like.
[0029]
In order to facilitate the above-described louver mounting operation, the lateral width Y of the metal fitting 3 (see FIG. 1 = the cutting width described above) is the distance between the downward lips 1a and 1a at the opening of the louver 1 (FIGS. 2 and 3). The dimension is sufficiently smaller than the distance S in the middle). Therefore, when the louver 1 is attached, the lateral width Y of the metal fitting 3 is arranged along the longitudinal direction of the opening of the louver 1 at the bolting position of the louver 1 and is lowered between both mouth edges. Then, it is used in such a manner that it is rotated about 90 degrees at a position deeper than the downward-facing lips 1a, 1a and the receiving grooves 3b, 3b on both sides receive the lips 1a, 1a. Therefore, there is no need to prepare the mounting bracket in advance at the bolted position of the louver 1, and the louver mounting operation can be performed smoothly and freely.
[0030]
As described above, as a work after the nut 6 is screwed together with the washer 7 and the louver 1 is fastened to the flange 10a of the small beam 10, the diameter previously provided near the upper end of the mounting bolt 2 as shown in FIG. It is also possible to prevent an accident of loosening of the nut 6 through the stopper pin 5 to the pin hole 4 in the linear direction (the invention described in claim 2). However, the illustration of the stop pin 5 is omitted in FIG.
[0031]
Although not clearly shown in FIG. 3, the louver 1 is provided with a large number of small holes that achieve a predetermined aperture ratio (usually 30% to 80%) over almost the entire side surfaces and bottom surface thereof (typically 30% to 80%). Invention of Claim 3).
[0032]
4 to 7 show different embodiments of the metal fitting 3 constituting the attachment metal fitting. These will be briefly described below.
[0033]
First, FIG. 4 has substantially the same configuration as that of the metal fitting 3 of FIGS. 1 and 2, but does not have a horizontal pressure contact surface portion (3g) at the distal ends of both arm portions 3h in which the receiving groove portions 3b are formed.
[0034]
The metal fitting shown in FIG. 5 shows an embodiment in which a receiving groove portion 3b having a rectangular shape is formed by an arm portion 3h that rises obliquely upward from a lower end portion of a vertical restraint wall 3f. The same operation and effect as the V-shaped receiving groove 3b can be expected for the receiving groove 3b. It is a matter of design whether or not to provide a horizontal pressure contact surface portion 3g at the leading edge of both arm portions 3h.
[0035]
The metal fitting shown in FIG. 6 is the same as the embodiment shown in FIG. 5 up to the point that the arm portion 3h that rises obliquely upward from the lower end portion of the vertical restraining wall 3f is formed to form the receptacle groove portion 3b. The difference is that a portion 3k rising vertically is formed above the portion 3h.
[0036]
The metal fitting shown in FIG. 7 shows an embodiment in which a rectangular receiving groove portion 3b is formed by projecting an arm portion 3h outward from a midway position of the restraining walls 3f on both sides.
[0037]
【The invention's effect】
In the louver mounting bracket according to the invention described in claims 4 to 7, the mounting bolt 2 is passed through the bolt hole 3c of the bracket 3, and the head 2a is supported so as not to rotate by the restraining wall 3f and the flange 3d. Therefore, it has excellent stability when the user holds it in his hand and can concentrate on the louver installation work. Therefore, the louver attaching work can be facilitated and the working efficiency can be enhanced. Moreover, this mounting bracket is lightweight and can be provided at low cost. There is flexibility and flexibility in setting up the louver 1 mounting work, and there is no need to prepare in advance at the bolting position of the louver. In this sense, the louver mounting work can be facilitated and the work efficiency can be improved. Can be increased.
[0038]
Since the louver mounting structure to the underside of the underpass such as an elevated road according to the first to third aspects of the present invention is implemented using the mounting bracket, the mounting bracket is lightweight and inexpensive. Can be directly reflected in the result of the louver mounting structure. Then, the louver attaching work can be facilitated and the working efficiency can be enhanced.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of a mounting bracket according to the present invention.
FIG. 2 is an enlarged front view showing the main part of the mounting bracket.
FIG. 3 is a front view showing a louver mounting structure.
FIG. 4 is a front view showing another embodiment of the metal fitting.
FIG. 5 is a front view showing another embodiment of the metal fitting.
FIG. 6 is a front view showing another embodiment of the metal fitting.
FIG. 7 is a front view showing another embodiment of the metal fitting.
[Explanation of symbols]
10 beam 1 louver 10a flange 8 bolt hole 1a lip 3 metal fitting 2 mounting bolt 3a metal fitting central part 3b receiving groove 3c bolt hole 3f restraint wall 6 nut 4 pin hole 5 set pin

Claims

It is a structure for attaching a louver to a small beam on the underside of a girder such as an elevated road,
It is composed of a plurality of small beams installed almost horizontally with a gap on the back side under the girders, a plurality of louvers attached to the small beams, and mounting brackets,
The beam has a horizontal flange at the bottom, and has a bolt hole at the louver mounting position of the flange,
The louver has a hollow structure in the vertical cross section, has an opening parallel to the longitudinal direction of the central part of the upper side, and has a downward lip on the mouth edge of the opening,
The mounting bracket is composed of a bracket and a mounting bolt, and a receiving groove portion for receiving the downward lip of the louver is formed on both sides of the center portion where the upper surface of the bracket is flat, and a bolt hole is provided in the center portion. A constraining wall is formed on both sides of the lower surface of the constraining wall so that the head of the mounting bolt passed through the bolt hole is constrained so as not to rotate, and the head of the mounting bolt is passed inside the lower end of the constraining wall. A hook that is possible but difficult to remove is formed at a position corresponding to the height of the head of the mounting bolt, the mounting bolt is passed through the bolt hole in the center of the bracket, and the head is the restraint wall and the hook Supported by
The louver is arranged in a direction perpendicular to the beam, and the upper side of the louver is applied to the lower surface of the flange of the beam. The mounting bracket receives the downward lip of the louver in the receiving groove, and the mounting bolt is inserted into the flange bolt hole. A louver mounting structure on the underside of a girder such as an elevated road, wherein the nut is screwed from above and fastened.

A pin hole in the diameter line direction is provided near the upper end of the mounting bolt, and a nut is screwed in and tightened, and a stop pin is passed through the pin hole of the bolt. Louver mounting structure on the underside of girders such as elevated roads described.

The louver attachment structure to the underside of a girder such as an elevated road according to claim 1, wherein the louver is provided with a large number of small holes that achieve a predetermined opening ratio.

It consists of metal fittings and mounting bolts, and a receiving groove for receiving the downward lip of the louver is formed on both sides of the central part where the upper surface of the metal fitting is flat, a bolt hole is provided in the central part, and the lower surface of the central part is A constraining wall is formed on both sides with a constraining interval so as not to rotate the head of the mounting bolt that has passed through the bolt hole, and the head of the mounting bolt can be passed inside the lower end of the constraining wall. A difficult flange is formed at a position corresponding to the height of the head of the mounting bolt, the mounting bolt is passed through the bolt hole at the center of the metal fitting, and the head is supported by the restraining wall and the flange. A louver mounting bracket on the underside of a girder such as an elevated road.

The receiving groove part on the both sides of the center part of the metal fitting, the constraining wall on the lower surface, and the flange part inside the lower end part of the aluminum extruded or pultruded product formed in a uniform cross section in the common center line direction are cut in a direction perpendicular to the center line. The louver mounting bracket to the underside of a girder such as an elevated road according to claim 4, wherein the louver mounting bracket is formed by:

6. The louver mounting bracket on the underside of a girder such as an elevated road according to claim 4 or 5, characterized in that the receiving groove portions on both sides of the central portion of the bracket are formed in a V shape or a cross shape.

7. A pin hole in the diameter line direction is provided in the vicinity of the upper end portion of the mounting bolt, and it is possible to insert a set pin after screwing and fastening a nut. The louver mounting bracket to the underside of girders such as elevated roads described in 1.