JP3567326B2

JP3567326B2 - U-shaped groove

Info

Publication number: JP3567326B2
Application number: JP2001108714A
Authority: JP
Inventors: 俊夫鎌田; 高栄寺沢
Original assignee: 俊夫鎌田; 高栄寺沢
Priority date: 2001-04-06
Filing date: 2001-04-06
Publication date: 2004-09-22
Anticipated expiration: 2021-04-06
Also published as: JP2002302995A

Description

【０００１】
【発明の属する技術分野】
本発明は、農業用及び工業用水路及び排水路、並びに一般土木用水路及び排水路に用いることができる合成樹脂製のＵ字溝に関する。
【０００２】
【従来の技術】
山野の土木開発現場や一般道路の側溝や排水路として使用されるＵ字溝は軟弱地盤地域において埋設使用する場合、地下水位の上昇により、Ｕ字溝が浮上して位置ずれするおそれがある。特に近年、コンクリート製のＵ字溝部材に代えて軽量で輸送面や施工面で取扱い易い合成樹脂製のＵ字溝部材が用いられるようになってきているので、Ｕ字溝の浮上防止対策はますます重要である。
特に、Ｕ字溝の壁側部が上面開口部に対して外開きに立ち上がる形状である場合には、側壁外からの土圧がＵ字溝の上面開口部方向に作用してＵ字溝が浮き上がり易いという問題があった。
この問題を解決するべく、従来から浮上防止材としてＵ字溝の幅より長い金属製の平板をＵ字溝側部ないし底部に設けることが知られている。例えば特開昭６１−１６２６４５号公報には、様々な方式で幅方向に延出する浮き防止板を側面或いは底面に設けたＵ字溝を開示する。前記浮き防止板においては、ネジやボルト・ナット又はリベット等の固定具を用いてＵ字溝に直接取り付けられる方式の他、浮き防止板を貫通させるためのガイド孔を有するガイド部材を前記のような固定具でＵ字溝に取り付けて、それに浮き防止板を貫通させる方式がとられている。
また、特開平２−３９９１３号では、合成樹脂製のＵ字溝において、浮上防止金具をＵ字溝底面の接続部位に係着し、前記金具の内側にＵ字溝の溝幅より長い棒体等を通してアンカリングすることが記載されている。
一方、合成樹脂製のＵ字溝部材については、従来のコンクリート製のＵ字溝部材と比較して肉厚が薄く、剛性が低いので、Ｕ字溝の底壁面から側壁面を波形もしくは類似の凹凸形状に成形するという方法が採用されている。（特開昭６１−８３７３１号公報、特開平１１−１９５６号公報等）。
このような底面に凹凸を有するＵ字溝に、ネジやボルト・ナット又はリベット等の固定具により安定に浮上防止材を取り付けることは、底面が平らなＵ字溝ほど容易ではない。上記特開昭６１−１６２６４５号公報には、このような形状のＵ字溝への浮上防止材の取り付けもまた示されており、波状の凹凸面が形成されるＵ字溝の外底面において、凹面の１つの開口部を板で閉鎖することによりＵ字溝の幅方向に貫通する挿通孔を形成してこの挿通孔の２つの浮き防止板を挿通し、その端部で嵌合させるものが示される。
【０００３】
【発明が解決しようとする課題】
しかし、上記したような従来の固定具を用いる浮上防止材のＵ字溝への取り付けは煩雑な作業を必要とする。また、浮上防止材または浮上防止材を取り付けるための部材をＵ字溝に固定するために、ネジやボルト・ナット等を使用する場合には、それらを挿入するための孔開け加工が必要になるとともに、該孔から水漏れが発生するおそれもあるのでその対策も必要となる。一方、上記特開昭６１−１６２６４５号公報に示される波状の凹凸面を有するＵ字溝の底面への浮き防止板の取り付けは、ネジ等の固定具の使用しないが、Ｕ字溝底部に形成された挿通孔に嵌合し得る部分を一端に形成した特殊な形状の浮き防止板を準備する必要があるため、別途この浮き防止板を設計・製造する作業が必要となり、これに関する工程数が増え、Ｕ字溝全体の生産コストもかかる。
さらに、これら従来技術における浮上防止材は主に金属製であるので、腐食による強度の低下の問題が生じる。
従って本発明の課題は、壁底部から左右の壁側部の上部へと延びる凹条部位および凸条部位を交互にＵ字溝の長手方向に連続形成することにより波形に成形されかつ浮上防止材を備えるＵ字溝にあって、従来の浮上防止材を備えるＵ字溝よりも容易に製造できるのは勿論のこと、かつ浮上防止材の取り付けがいたって容易なＵ字溝を提供することにある。また、本発明は、従来のＵ字溝のように浮上防止材を取り付けるために設けられた孔による水漏れのおそれがなく、さらに浮上防止材を取り付けるための部材等を必要としないＵ字溝を提供することを課題とする。
【０００４】
【課題を解決するための手段】
本発明者らは上記課題を解決するべく鋭意検討を行った。その結果、壁底部から左右の壁側部の上部へと延びる凹条部位および凸条部位を交互にＵ字溝の長手方向に連続形成することにより波形に成形されるＵ字溝本体の壁底部の一部において、凹条部位及び凸条部位の形状を工夫して角アングル材の浮上防止材を挟み支持する支持溝部を形成するよう成形し、その部分に前記角アングル材を挿通させることにより浮上防止材を簡単に取り付けることのできる、従来にはない構造の浮上防止材を備えるＵ字溝を発明するに至った。
【０００５】
すなわち、本発明は、断面Ｕ字形状の壁を形成するＵ字溝本体であって、該本体の壁底部から左右の壁側部の上部へと延びる凹条部位および凸条部位を交互に、Ｕ字溝の長手方向に連続形成することにより、波形に成形されたＵ字溝本体と、前記本体の壁底部の下側に取付けられる浮上防止材とを備えてなる、硬質合成樹脂または繊維強化樹脂からなるＵ字溝であって、
前記浮上防止材はＵ字溝の幅よりも長い角アングル材からなり、一方前記壁底部は、該浮上防止材を挿通し支持することができる溝部分であって、挿通された浮上防止材の両アングル面部を各々挟持する構造に設計された浮上防止材支持溝部を設けてなることを特徴とする、Ｕ字溝に関する。
本発明の好ましい態様は、前記浮上防止材は、角アングル材の折れ曲がり部分が下になるように前記Ｕ字溝本体に取付けられていることを特徴とするＵ字溝に関する。
さらにまた好ましくは、本発明は、前記Ｕ字溝は、前記Ｕ字溝本体の左右の壁側部の間に横架、固定される架け渡し材をさらに備え、該架け渡し材は、平板または平坦な上面を有する角アングル材からなり、一方、前記Ｕ字溝本体の左右の壁側部は各々、壁底部より垂直にもしくは外開きに立ち上がるが、その上部において、剛性を高めるべく凹条部位は内方に反り成形され、そして両壁側部上端は各々、外方に延びて、平坦な面を有する架け渡し材受け部を形成してなり、前記架け渡し材の両端部が該架け渡し材受け部上で固定されていることを特徴とするＵ字溝に関する。
その中で好ましい態様は、前記架け渡し材の両端部は、硬質合成樹脂または繊維強化樹脂からなるリベットを用いて、前記架け渡し材受け部に鋲着されていることを特徴とする前述のＵ字溝に関する。
さらにまた、本発明の別の好ましい態様は、前記Ｕ字溝本体は、左右の壁側部に、外方に突出するリブ部を設けてなることを特徴とするＵ字溝に関する。
本発明の好ましい態様はまた、前記架け渡し材受け部上にＵ字溝の長手方向に沿って装着される、硬質合成樹脂または繊維強化樹脂からなる補強材をさらに備えてなることを特徴とする。
【０００６】
本発明のＵ字溝は硬質合成樹脂または繊維強化樹脂製であり、剛性をはかるべく、Ｕ字溝本体が壁底部から左右の壁側部の上部へと延びる凹条部位および凸条部位を交互に、Ｕ字溝の長手方向に連続形成することにより、波形に成形されているとともに、該本体の左右の壁側部の間に該本体と同様の樹脂製の架け渡し材が横架、固定されているものである。
Ｕ字溝の一番弱い部分であるＵ字溝上部に、Ｕ字溝の両側壁を架け渡す架け渡し材を取り付けることによって、合成樹脂製Ｕ字溝の側壁外からの土圧に対し剛性を向上させる方法は従来より知られている（特開２０００−１２９７６８号公報、特開２０００−１０４３２６号公報等）。そしてそれらの多くは金属製の補強材を幅方向に数カ所取り付けることによるものであるが、金属は腐食による強度の減少および外観の悪化が生じるおそれがある。しかしながら、本発明では、架け渡し材に金属を使用しないのでこのような問題は起きない。
そして本発明のＵ字溝本体の壁底部の下側には、浮上防止材として、Ｕ字溝の幅よりも長い、同じく硬質合成樹脂または繊維強化樹脂製の角アングル材を備える。この浮上防止用角アングル材を取り付けるため、本発明のＵ字溝の壁底部には、該浮上防止材を挿通し支持することができる溝部分であって、挿通された角アングル材の両アングル面部を各々挟持する構造に設計された浮上防止材支持溝部を設けている。ここで、アングル面部とは、角アングル材の折れ曲がり部分から左右にその幅方向の縁部まで延びる面部分を意味する。
前記浮上防止材支持溝部は、Ｕ字溝本体の壁底部における１つの凹条部位とその両側に隣接する２つの凸条部位から構成される。浮上防止材である角アングル材は断面略Ｌ字形の折れ曲がり部分が下になるように、Ｕ字溝本体の壁底部に取付けられる。このため、前記Ｕ字溝本体の壁底部の凹条部位はこの角アングル材の谷側の両アングル面部と当接し、また、該凹条部位の両側に隣接する２つの凸条部位は各々、該角アングル材の山側の両アングル面をそれぞれ支持できるように、前記凹条部位と隣接する側において互いに内向きに、より突出する形状をとる。言い換えれば、前記浮上防止材支持溝部は、前記角アングル材の折れ曲がり部分を下にして、それをＵ字溝本体の壁底部の凹凸条部位によって挟み込むように支持できる形状をもち、その形状は全体として、オーム（Ω）形を逆さにした形状に近い形状をもつ。
角アングル材はこの溝部に嵌合させ、Ｕ字溝壁底部の一方側から反対側にわたって挿通させることによって取付けることができる。
また、本発明では浮上防止材として硬質合成樹脂または繊維強化樹脂製で、汎用性のある断面略Ｌ字形状の角アングル材を使用するため、その製造は容易であり、また、十分な強度をもつ。さらに、この浮上防止材である角アングル材はその折れ曲がり部分が下になるようにＵ字溝に取付けられるため、Ｕ字溝埋設時にはより多くの土砂を受けて平板形の浮上防止材よりもより良く固定される。しかも本発明では金属材料を使用しないので腐食による強度低下の問題は生じない。さらにこの浮上防止材支持溝部は、浮上防止材を取り付けるための固定具を必要とせず、また、浮上防止材と嵌合して固定するための嵌合部材を取り付ける必要もない。すなわち、本発明のＵ字溝における浮上防止材の取り付け構造は、浮上防止材としての角アングル材と、Ｕ字溝本体の壁底部の一部の形状を変更した、角アングル材を挿通し支持することができる浮上防止材支持溝部という簡単な構成よりなる。したがって、Ｕ字溝の製造においても特別な工程は必要とされず、また、浮上防止材を取付けても、前記浮上防止材支持溝部に浮上防止材を挿通する作業のみであるので、極めて容易で迅速に行えるものである。また、取り付けにＵ字溝の孔開けを伴わないので水漏れ防止に対する対策を必要としない。
本発明の他の態様においては、浮上防止材として、Ｕ字溝の幅よりも長い硬質合成樹脂または繊維強化樹脂からなる棒材、角材、管材または筒材等を使用するＵ字溝であってもよい。これらは上記角アングル材と同様一般的に入手しやすい。
この場合にあっては、Ｕ字溝本体の壁底部の浮上防止材支持溝部分は、挿通された浮上防止材を囲み支持する構造に設計される。
さらに好ましくは本発明のＵ字溝本体は、前記波形に成形されたＵ字溝本体において左右の壁側部が各々、壁底部より垂直にもしくは外開きに立ち上がるが、左右の壁側部の凹条部位はそのまま上端まで延びるのではなく、上部において内方に反った構造に成形されている。この構造により左右の両壁側部上部においては外方から内方に絞り込まれた形状となるため、Ｕ字溝の構造上特に弱いこの部分において、従来のような単に凹凸条のみを側面に配したＵ字溝よりも、種々の荷重方向からの土圧に対する剛性をより高めることができる。
また、本発明のＵ字溝本体に使用する前記架け渡し材は、好ましくは、平板または平坦な上面を有する角アングル材からなるものであれば、Ｕ字溝上部に設置された後の架け渡し材は鋭利な部分を露出しないため安全であり、見た目もきれいな状態となる。さらに前記架け渡し材の両端部の固定を、好ましくは硬質合成樹脂または繊維強化樹脂からなるリベットを用いて前記架け渡し材受け部に鋲着にすることにより行えば、ネジやボルト・ナットによる固定に比べて取り付け作業は非常に簡単で迅速に行うことができる。
さらにまた、本発明のＵ字溝本体には左右の壁側部に外方に突出するリブ部を設けることによって、より良い剛性を付与し、また、このリブ部によって構成される壁側部から外側に突出した部分も、上記浮上防止材と同様にＵ字溝埋設時にリブ部の上部に置かれる土砂によって、Ｕ字溝の浮き上がりを防止する。
加えて本発明のＵ字溝では、そのＵ字溝本体の両壁側上部の架け渡し材受け部に、長手方向に沿って硬質合成樹脂または繊維強化樹脂製の補強材を装着することもできる。この装着によって、Ｕ字溝にさらにより高い剛性を与えることも可能である。
【０００７】
【実施例】
図面を参照して本発明をさらに詳細に説明する。以下の実施例は本発明を限定することを目的とするものではない。
【０００８】
実施例１
本発明のＵ字溝の一態様を図１ないし図３に示す。図１は本実施例のＵ字溝１を説明する図であり、図２は図１に示すＵ字溝１の平面図であり、図３は、その側面図である。Ｕ字溝１は、例えば幅１８０ｍｍ、２４０ｍｍ、３００ｍｍ、４００ｍｍ、５００ｍｍ、６００ｍｍ、７００ｍｍ、８００ｍｍ、９００ｍｍ、１０００ｍｍの寸法規格を有する各種製品よりなり、いずれも直壁タイプである。図１ないし図３から明らかなように本実施例において、ポリエチレン樹脂からなるＵ字溝本体２は、左右の壁側部４、４が各々、壁底部３から垂直に立ちあがった形状をなし、壁底部３から左右の壁側部４、４の上部へと延びる凹条部位５・・および凸条部位６・・を交互にＵ字溝１の長手方向に連続形成することにより、波形に成形されている。図１および図３にも示すようにＵ字溝本体２の底部には浮上防止材支持溝部３１が形成され、そして浮上防止材としてＵ字溝１の幅より長い角アングル材３０が挿通され支持されている。
Ｕ字溝本体２は本実施例のように壁底部３から垂直に立ち上がった形状の他、上部に向けてやや外開きに立ち上がった形状をとってもよい。また本発明における断面のＵ字形状とは、流体通路を形成する凹部空間を形成するもの一般を含み、本来のＵ字形の他、断面コの字形、あるいは上面が開放された断面半円状のものを含むものとする。
また、本実施例では硬質合成樹脂としてポリエチレン樹脂を使用したが、他に、ポリ塩化ビニル、ポリプロピレン、ポリエチレンテレフタレート、ポリアミド、ポリフェニレンスルフィド等が使用でき、また、不飽和ポリエステル等に、ガラス繊維、炭素繊維、有機繊維（ケブラー等）などを含有させた繊維強化樹脂（ＦＲＰ、ＦＲＴＰ）等が利用できる。さらに、本発明のＵ字溝はブロー成形、回転成形等により成形できる。
図４は、図２中のＡ−Ａ線で切断したＵ字溝本体２の凸条部位６の断面図を示すが、この図から明らかなように、凸条部位６・・は壁底部３からそのまま左右の壁側部４、４の上端まで延び、そして外方に延びて平坦な面である、架け渡し材受け部８、８を形成する。しかし、図５である、図２中のＢ−Ｂ線で切断したＵ字溝本体２の凹条部位５の断面図から明らかであるように、凹条部位５・・は左右の壁側部４、４の上部において、内方に反った形状５ａ・・をとりながら左右の壁側部４、４の上端まで延び、上端から外方に延びて前記架け渡し材受け部８、８に繋がっている。この結果、Ｕ字溝本体２の両壁側部４、４の上部は全体として、外方から内方へ絞り込まれたような形状になる。この形状は、Ｕ字溝１の敷設後に、Ｕ字溝本体２の弱い部分である左右の壁側部４、４の上部付近に加わる種々の荷重方向からの土圧に対しより一層の剛性を与えるものである。
上述したようにＵ字溝本体２の両壁側部４、４の上端は凹条部位５・・および凸条部位６・・のいずれも各々外方に延びて、平坦な面である架け渡し材受け部８，８を形成している。図１および図２に示すように、本実施例のＵ字溝１では、この架け渡し材受け部８、８上で、架け渡し材として図８に示す樹脂製の断面略Ｌ字形の角アングル材７Ａを両壁側部４、４の間に横架して取付けることができる。
この角アングル材７Ａの横架によって、本発明のＵ字溝１はＵ字溝本体２の両壁側部４、４にかかる土圧に対しさらに高い剛性を得ることができ、Ｕ字溝本体２の変形を防止できる。
【０００９】
本実施例に示す本発明のＵ字溝１は、Ｕ字溝本体２の壁底部３の下側に浮上防止材として図６に示すようなＵ字溝本体２と同じ樹脂よりなり、Ｕ字溝１の幅よりも長い、断面略Ｌ字形状の角アングル材３０を備えることを特徴とする。
図７にその詳細を示すように、Ｕ字溝本体２は、その中央部分の壁底部３の凹条部位５とその両側に隣接する２つの凸条部位６、６が、浮上防止角アングル材３０の両アングル面部をそれぞれ挟持できるような構造の浮上防止材支持溝部３１を形成するように成形されている。この前記溝部３１において、前記凹条部位５は変形して浮上防止角アングル材３０の断面Ｌ字形の谷側と図中、部分３５で当接し、また、該凹条部位５の両側の２つの凸条部位６、６は該凹条部位５と隣接する側において各々の形状を変形して前記角アングル材３０の断面Ｌ字形の山側を図中、部分３６で支持するように互いに内向きに突出する形状をとるため、全体として、オーム（Ω）形を逆さにしたような形状をもつ。そして浮上防止角アングル材３０はＵ字溝本体壁底部３下側の溝部３１に一方側から反対側にわたって挿通させて、Ｕ字溝１の幅を規定する、Ｕ字溝本体２の両壁側部４、４よりも外方に突出するように取りつけられる。従って、浮上防止角アングル材３０をＵ字溝本体２に取り付けるためのネジやボルト・ナット又は、リベット等の固定具は必要とならない。本発明のＵ字溝１の浮上防止角アングル材３０の取り付け構造は、極めて簡単な構成からなる。従って、本発明のＵ字溝本体２の成形後に何ら加工を要することが無く、また、この浮上防止材の取り付け作業は非常に簡単である。
なお、浮上防止材支持溝部３１は、壁底部３と両壁側部４、４が接する部分の２箇所にこの形状を適用するのみで浮上防止材を支持させる構造も可能であるが、実際の敷設時において、角アングル材３０を挿通させる取り付け作業が容易なように、通常はＵ字溝本体壁底部３の幅方向全体にわたって浮上防止材支持溝部３１を設ける。また本実施例では、１つのＵ字溝本体２に対し浮上防止角アングル材３０を１つ設けるようにしたが、Ｕ字溝の長さに合わせて、２以上の角アングル材３０を設置できるように設計することもできる。
Ｕ字溝１の敷設時には、この浮上防止角アングル材３０の部分に堆積する土砂によって浮上防止効果が得られる。本発明では特に、浮上防止材として硬質合成樹脂または繊維強化樹脂製の角アングル材３０を使用するため、金属製の浮上防止材のように腐食による強度低下のおそれがなく、また、その形状は平板形の浮上防止材よりも強度があり合成樹脂等からなるものであっても十分な強度を有する。さらに本発明では、浮上防止角アングル材３０はその折れ曲がり部分が下になるようにＵ字溝本体２の壁底部３に取付けられるため、埋設時に該角アングル材は平板形の浮上防止材よりもより確実に土砂を受けることができ、Ｕ字溝がより良く固定される。本実施例ではＵ字溝本体２と同じ樹脂を用いたが、上記浮上防止角アングル材３０としてもちろんＵ字溝本体２とは別の種々の硬質合成樹脂等を使用できる。
【００１０】
図２１に示すように、浮上防止材は、上記角アングル材３０の他、それと同様、Ｕ字溝１の幅よりも長い管材４０も採用できる。この管材４０も、Ｕ字溝本体２と同じかまたは異なる硬質合成樹脂または繊維強化樹脂からなるものである。図２１はまた、この浮上防止管材４０を囲み支持するよう設計された、Ｕ字溝本体２の壁底部３に設けた浮上防止材支持溝部４１を示す。この浮上防止材支持溝部４１は、挿通される浮上防止管材４０がＵ字溝本体２の壁底部３に保持され得るように、該壁底部３の２つの部分がそれらの間に丸い空洞を形成するように下方に延び、その先端が該浮上防止材を囲み支持するように内向き変形した部位３ａ、３ａによって形成されている。
なお上記管材４０の他、このような浮上防止材支持溝部を使用する態様には浮上防止材として、樹脂製の棒材、角材、筒材等を使用することもまた可能である。
【００１１】
図８に示すように、本実施例ではＵ字溝１の架け渡し材として、両端に孔７ａ、７ａが穿設された、Ｕ字溝本体２と同じ材質の断面略Ｌ字形の角アングル材７Ａを使用する。この角アングル材７Ａは上述したＵ字溝本体２の両壁側部４、４の上端の平坦な架け渡し材受け部８，８に配置して両壁側部４、４の間に横架するように取付けることができる。
図１および図２等から明らかなように、左右の架け渡し材受け部８、８には凸条部位６・・の上部位置に、長手方向に対して一定の間隔で孔８ａ・・が対となって穿設されているので、図９及び図１０に示すように、この部分に角アングル材７Ａを取付けることができる。本実施例ではこのようにＵ字溝本体２自体に架け渡し材を受ける部分を有しているので架け渡し材を使用するにあたって架け渡し材を配置するための他の補助部材を必要としない。
角アングル材７Ａは、その両端に穿設された孔７ａ、７ａと、架け渡し材受け部の孔８ａ、８ａとを位置合せし、リベット９で鋲着することによりＵ字溝本体２上部に固定できる。リベット９は図１１に示す形状をもち、Ｕ字溝本体２と同じ材質からなる樹脂製であるが他の硬質合成樹脂または繊維強化樹脂も使用できる。このリベット９の使用により、架け渡し材の取り付けは、ネジやボルト・ナット等による場合に比べて非常に簡単である。
また、図８（ｃ）に示すこのＬ字形角アングル材７Ａの孔７ａの無い面は、その両端部が切り欠かれており、孔７ａのある面（図８（ｂ））よりもその短く設計されている。従って、孔７ａの無い面（図８（ｃ））を下向きにＵ字溝本体２内に取り付けることができる。このため、角アングル材７ＡをＵ字溝本体２に取り付けた後、該角アングル材７ＡもＵ字溝上面から突出しないので突出部によって作業者が負傷するというおそれはなく、見た目もきれいである。架け渡し材はまた、上記角アングル材の形状の他に、固定用の孔を両端に設けた平板の形状でも使用できる。
【００１２】
本実施例のＵ字溝１においては架け渡し材として、前記リベット９で固定可能な上記角アングル材７Ａに代えてまたはそれと併用して、Ｕ字溝本体１の壁側部４，４内側上部に架け渡し材受け部を形成し、そこに嵌め止めることのできる他の架け渡し材を使用することができる。この架け渡し材のＵ字溝本体への取り付けはネジ、ボルト・ナットや、リベット等の固定具を必要としないので、取りつけを迅速に進めることができる。しかもこのＵ字溝本体２に形成された架け渡し材受け部もＵ字溝本体２の構造の一部でありその成形と同時に形成されるので、架け渡し材の取り付け時にそれを配置させるための補助部材を必要としない。
本実施例では、Ｕ字溝本体２は、図２にも示すように、図１２に示すＵ字溝本体２と同じ材質の樹脂製の角アングル材７Ｂが使用できるように設計されている。即ち、図１、図１４及び図１５から明らかなようにＵ字溝本体２には、架け渡し材受け部として、前記角アングル材７Ｂに対応する略Ｌ字形の受け凹部１０がその壁側部４、４の凹条部位５・・上部に形成されている。より詳細には、図１、図１３ないし図１５に示すように、該Ｕ字溝本体２の左右の壁側部４、４の上部の、凹条部位５・・における内方に反った形状５ａ・・の一部は、Ｕ字溝１の長手方向に対して一定の間隔で、より大きく内方に反り、隣り合う両側の凸条部位６・・と一緒になって上端まで延びる平坦な壁側部５ｂ・・を形成しており、同時にこの平坦な壁側部５ｂ・・には架け渡し材受け部として、角アングル材７Ｂの端部を受け収めることができる略Ｌ字形の受け凹部１０・・が設けられている。
図１３（ａ）は受け凹部１０に角アングル材７Ｂが嵌め込まれたＵ字溝本体壁側部４の外側から見た状態を示し、そして図１３（ｂ）は同じ状態を壁側部４の内側から見た図である（図１３（ａ）の丸枠Ａ部分の拡大図）。受け凹部１０の形状は、角アングル材７Ｂの端部断面の形を取り囲む略Ｌ字形であり、またこの形状の上部には開口部１０ａが設けられている。この開口部１０ａは角アングル材７Ｂの嵌め込みをより容易にし、また、Ｕ字溝１の設置作業時にこの受け凹部１０に土砂等の異物が入った場合に除去し易い。
この架け渡し材である角アングル材７Ｂはその折れ曲がった部分の山側を上にして使用するので、Ｕ字溝本体２に取り付けた後にその鋭利な縁はＵ字溝上面から突出せず、作業現場において架け渡し材の突出部によって作業者が負傷するというおそれはなく、見た目もきれいである。
【００１３】
また、上記角アングル材７Ａに代えて使用できる、またはそれと併用可能な、Ｕ字溝壁側部４、４に嵌め止めることのできる別の架け渡し材として、図１６に示す管材７Ｃが使用できる。この管材Ｃを架け渡し材として使用する場合のＵ字溝１の構造を図１７に示す。図１７に示すＵ字溝本体２もまた、壁底部３から左右の壁側部４，４の上部に延びる凹条部位５・・および凸条部位６・・を交互に、Ｕ字溝１の長手方向に連続形成することにより、波形に成形されており、また凹状部位５・・は左右の壁側部４、４の上部において、内方に反った形状５ａ・・をとる。本態様では、図１７ないし図１９に示すように前記凹条部位５・・における内方に反った形状５ａ・・の一部は、Ｕ字溝１の長手方向に対して一定の間隔で、架け渡し材である管材７Ｃが嵌合し得る突部１１ａ・・を左右の壁側部４、４上部で対になるように形成し、かつ前記各突部１１ａ・・の下側に嵌合された管材７Ｃを支持するための架け渡し材支持部１１ｂ・・を形成している。即ち架け渡し材である管材Ｃの両端を嵌め止める凸状の架け渡し材受け部１１、１１は、前記突部１１ａ、１１ａと前記架け渡し材支持部１１ｂ、１１ｂとから、構成されている。
なお、この態様では、図１６に示すようなＵ字溝本体２と同じ材質からなる中空の角形の管材７Ｃを使用するが、架け渡し材は他の形状の管材、筒材または両端部に差込み孔を形成する軸材等の形状であってよく、使用する架け渡し材の形状に合せて突部１１ａ・・および架け渡し材支持部１１ｂ・・の形状が設計される。
以上説明した、本発明のＵ字溝１における架け渡し材である角アングル材７Ａ、角アングル材７Ｂまたは管材７Ｃは硬質合成樹脂製または繊維強化樹脂製であるため従来のような金属製の架け渡し材とは異なり、腐食による強度の減少および外観の悪化を生じさせない。また、前記各架け渡し材は、Ｕ字溝本体２と同じ樹脂である例を述べたが、Ｕ字溝本体２と異なる硬質合成樹脂または繊維強化樹脂を使用してもよい。
このようにして、上記架け渡し材７Ａの他、７Ｂまたは７Ｃを単独でまたは架け渡し材７Ａと併用して横架することによって、本発明のＵ字溝１はＵ字溝本体２の両壁側部４、４にかかる土圧に対しさらに高い剛性を得ることができ、Ｕ字溝本体２の変形が防止できる。
【００１４】
上記実施例に挙げた本発明のＵ字溝本体２にはまた、図１ないし図３等に示すように、左右の壁側部４、４のやや下部よりに、一定の間隔で、凹条部位５・・および凸条部位６・・にわたって外方に突出するリブ部１５・・が設けられており、Ｕ字溝本体２にさらに一層の剛性を与えている。さらにこのリブ部１５・・もまた、土中に埋設した場合にＵ字溝壁側部４，４よりも外側に突出するところの部分であり、ここに土砂が堆積しその荷重が負荷されるためＵ字溝本体２が浮上するのを防ぐ。
また、本実施例のＵ字溝本体２の一端部は、図２および図３に示すように、内壁の大きさが他の部分よりもやや大きく設計された外嵌接続部２ａとなっており、他端部を内嵌接続部２ｂとして他のＵ字溝本体２が接続できるように設計されている。２つのＵ字溝本体を接続する場合、外嵌接続部２ａがリブ部１５を含めて内嵌接続部２ｂを被うように嵌合される。また、接続方法は、接続部の水漏れを最小にするため、水の流れ方向がＵ字溝本体２の内嵌接続部２ｂから他のＵ字溝本体２の外嵌接続部２ａに向かう方向となるように接続することが好ましい。
【００１５】
本発明のＵ字溝１はさらに、剛性を高めるため、Ｕ字溝本体２と同じ材質である、図２０に示すような断面略Ｌ字形の角アングル材である補強材２０をＵ字溝本体２の両壁側部上端の架け渡し材受け部８、８上に長手方向に装着して使用することもできる。補強材２０にはその一方の面部に孔２０ａ・・が穿設されているので、これを架け渡し材受け部８、８の孔８ａ・・と位置合わせして装着し、その後、上述した角アングル材７Ａの両端の孔７ａ，７ａをも位置合わせして前記架け渡し受け部８、８上に置き、リベット９により同時に固定することができる。
【００１６】
【発明の効果】
以上の説明から明らかなように、本発明は上記のように波形に成形されたＵ字溝本体の壁底部の下側に、浮上防止材として、該Ｕ字溝の幅よりも長い合成樹脂等からなる角アングル材を備えるＵ字溝であるが、その取り付けのためにＵ字溝本体自体がその壁底部に該浮上防止材を挿通し支持することができる浮上防止材支持溝部を設けて成形されている。従って、本発明のＵ字溝は、従来技術のように浮上防止材を固定するための部材を必要としないので製造コストにおいて有利である。さらに、浮上防止材の取り付けは単にＵ字溝の底部下側の浮上防止材支持溝部に一方側から反対側にわたって嵌合挿通させるのみであるのでＵ字溝施工時における取り付け作業も極めて容易で迅速に行える。また、取り付けにＵ字溝の孔開けを伴わないので孔による水漏れのおそれはない。
また、本発明では浮上防止材が角アングル材であるため、合成樹脂等からなるものであっても十分な強度をもち、さらに、それは該角アングル材の折れ曲がり部分が下になるようにＵ字溝に取付けられるため、埋設時には平板形の浮上防止材よりもより多くの土砂を受け、より良く固定される。
なお上記角アングル材の他、浮上防止材として、樹脂製の棒材、角材、管材または筒材等、汎用性のある様々な形状の部材を利用し、それに対応して、Ｕ字溝本体の壁底部は該浮上防止材を囲み支持することができるように浮上防止材支持溝部を設計して成形することによっても、角アングル材を使用する場合と同様の効果が得られる。
さらにまた、本発明のＵ字溝はＵ字溝本体の壁底部から左右の壁側部の上部へと延びる凹条部位および凸条部位を交互に、Ｕ字溝の長手方向に連続形成することにより、波形に成形されたＵ字溝本体と、該本体の左右の壁側部の間に横架、固定される架け渡し材とを備える構造をもつが、この構造によって本発明は全ての部材が硬質合成樹脂または繊維強化樹脂からなるＵ字溝であるにもかかわらず、従来の金属製の架け渡し材を使用する場合に劣らず、その左右の壁側部上部付近に加わる種々の方向からの土圧荷重に対して十分な剛性をもつ。しかも、金属の腐食による各部材の強度の減少や外観の悪化を生じることがない。
特に、本発明のＵ字溝本体の形状が左右の壁側部が各々、壁底部より垂直にもしくは外開きに立ち上がるが、その上部において凹条部位は内方に反り成形されるのであれば、Ｕ字溝本体の形状は両壁側部上部において外方から内方に絞り込まれた形状となるので、従来の単に凹凸条のみを底面から側面上端まで配したＵ字溝よりも、左右の壁側部の上部付近において種々の荷重方向からの土圧に対して高い剛性が得られる。さらにこの場合両壁側部上端は各々外方に延びて、平坦な面を有する架け渡し材受け部を形成する形状をとるので、架け渡し材を架け渡すための補助部材を使用せずに架け渡し材の両端部をそのまま該架け渡し材受け部上に固定できる。また、本発明の前記架け渡し材は、平板または平坦な上面を有する角アングル材からなるものであれば、Ｕ字溝上部に設置された後の架け渡し材の状態は鋭利な部分を露出しないため作業者を負傷させるおそれがなく安全であり、見た目もきれいな状態となる。
さらに、前記架け渡し材の前記架け渡し材受け部への固定を、Ｕ字溝と同様、合成樹脂等からなるリベットを用いる鋲着によって行うこととすれば、ネジやボルト・ナットを用いる場合のように固定作業が煩雑にならずに架け渡し材を非常に簡単で迅速に取り付けることができる。
さらに、本発明のＵ字溝本体に左右の壁側部に外方に突出するリブ部を設けることによって、本発明のＵ字溝により一層のより良い剛性を与え、また、このリブ部によって構成される壁側部から外側に突出した部分もまた、上記浮上防止材と同様にＵ字溝埋設時にリブ部の上部に置かれる土砂によってＵ字溝を固定し、Ｕ字溝の浮き上がりを防止する効果が得られる。
加えて、本発明のＵ字溝の両壁側上部の架け渡し材受け部に、Ｕ字溝の長手方向に沿って樹脂製の補強材を装着することもでき、この装着によってＵ字溝にさらにより高い剛性を与えることも可能である。
従って、本発明により浮上防止材の取り付けが容易で、軽量であるが剛性が高い合成樹脂製のＵ字溝が提供できる。
【図面の簡単な説明】
【図１】本発明のＵ字溝の一態様を説明する図である。
【図２】本発明のＵ字溝の一態様を示すＵ字溝の平面図である。
【図３】図２に示すＵ字溝の側面図である。
【図４】図２のＡ−Ａ線で切断したＵ字溝本体の凸条部位の断面図である。
【図５】図２のＢ−Ｂ線で切断したＵ字溝本体の凹条部位の断面図である。
【図６】本発明のＵ字溝の浮上防止材としての角アングル材の平面図（ａ）および正面図（ｂ）である。
【図７】Ｕ字溝本体壁底部の浮上防止材支持溝部において図６の角アングル材が挿通された状態を示す図である。
【図８】本発明のＵ字溝に横架する架け渡し材としての角アングル材の平面図（ａ）、正面図（ｂ）および側面図（ｃ）である。
【図９】Ｕ字溝本体の架け渡し材受け部において図８の角アングル材を架け渡した状態を上方からみた部分図である。
【図１０】図９のＣ−Ｃ線で切断した断面図である。
【図１１】角アングル材を固定するためのリベットの平面図（ａ）および正面図（ｂ）である。
【図１２】他の架け渡し材の例としての角アングル材の正面図（ａ）および側面図（ｂ）である。
【図１３】受け凹部に図１２の角アングル材が嵌め込まれた状態をＵ字溝本体壁側部外側から見た図（ａ）および同じ状態を壁側部内側から見た丸枠Ａ部分の拡大図（ｂ）である。
【図１４】図１２の角アングル材をＵ字溝本体の受け凹部に嵌め込んだ状態を上方からみた部分図である。
【図１５】図１４のＤ−Ｄ線で切断した断面図である。
【図１６】他の架け渡し材の別の例としての管材の正面図（ａ）および側面図（ｂ）である。
【図１７】図１６に示す管材を使用するために設計された他の態様のＵ字溝を説明する図である。
【図１８】図１６に示す管材をＵ字溝本体の架け渡し材受け部に嵌合させた状態を上方からみた部分図である。
【図１９】図１８のＥ−Ｅ線で切断した断面図である。
【図２０】架け渡し材受け部上にＵ字溝の長手方向に沿って装着される補強材の平面図（ａ）および正面図（ｂ）である。
【図２１】浮上防止材として管材を使用した場合における、浮上防止材支持溝部に管材が挿通された状態を示す図である。
【符号の説明】
１Ｕ字溝
２Ｕ字溝本体
３壁底部
４壁側部
５凹条部位
５ａ内方に反った形状
６凸条部位
７Ａ角アングル材
７Ｂ角アングル材
７Ｃ管材
８架け渡し材受け部
９リベット
１０受け凹部
１１ａ突部
１１ｂ架け渡し材支持部
１５リブ部
２０補強材
３０浮上防止角アングル材
３１、４１浮上防止材支持溝部
４０浮上防止管材[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a synthetic resin U-shaped groove that can be used for agricultural and industrial waterways and drainage channels, and general civil engineering waterways and drainage channels.
[0002]
[Prior art]
When U-shaped grooves used as side gutters and drainage channels for civil engineering development sites and general roads in Yamano are buried in soft ground areas, the U-shaped grooves may rise and shift due to rising groundwater levels. In particular, in recent years, a U-shaped groove member made of synthetic resin, which is lightweight and easy to handle in terms of transportation and construction, has been used instead of a U-shaped groove member made of concrete. More and more important.
In particular, when the wall side of the U-shaped groove has a shape that rises outward with respect to the upper surface opening, the earth pressure from outside the side wall acts on the U-shaped groove toward the upper surface opening, and the U-shaped groove is formed. There was a problem that it was easily lifted.
In order to solve this problem, it has been conventionally known to provide a metal flat plate longer than the width of the U-shaped groove on the side or bottom of the U-shaped groove as a floating prevention member. For example, Japanese Unexamined Patent Publication (Kokai) No. 61-162645 discloses a U-shaped groove provided on a side surface or a bottom surface with a floating prevention plate extending in the width direction by various methods. In the floating prevention plate, a guide member having a guide hole for penetrating the floating prevention plate is used as described above, in addition to a method of directly mounting the floating prevention plate using a fixture such as a screw, a bolt, a nut, or a rivet. There is adopted a method in which the anti-floating plate is attached to the U-shaped groove with a simple fixing tool and penetrated therethrough.
In Japanese Unexamined Patent Publication (Kokai) No. 2-39913, in a U-shaped groove made of synthetic resin, an anti-floating metal fitting is engaged with a connection portion on the bottom surface of the U-shaped groove, and a rod body longer than the groove width of the U-shaped groove inside the metal fitting. And the like are described.
On the other hand, since the U-shaped groove member made of synthetic resin is thinner and has lower rigidity than the U-shaped groove member made of conventional concrete, the U-shaped groove has a corrugated or similar side wall surface from the bottom wall surface. A method of molding into an uneven shape is employed. (JP-A-61-83731, JP-A-11-1956, etc.).
It is not as easy to attach an anti-floating material to such a U-shaped groove having irregularities on the bottom surface with a fixing tool such as a screw, a bolt, a nut, or a rivet. The above-mentioned Japanese Patent Application Laid-Open No. 61-162645 also shows attachment of a floating prevention member to a U-shaped groove having such a shape, and at the outer bottom surface of the U-shaped groove on which a wavy uneven surface is formed, By closing one opening of the concave surface with a plate, an insertion hole penetrating in the width direction of the U-shaped groove is formed, and two floating prevention plates of the insertion hole are inserted and fitted at its ends. Shown.
[0003]
[Problems to be solved by the invention]
However, mounting the anti-floating material to the U-shaped groove using the above-mentioned conventional fixing device requires a complicated operation. In addition, when screws, bolts, nuts, and the like are used to fix the surfacing prevention member or a member for attaching the surfacing prevention material to the U-shaped groove, a hole-drilling process for inserting them is required. At the same time, there is a possibility that water leaks from the holes. On the other hand, the mounting of the floating prevention plate on the bottom surface of the U-shaped groove having a wavy uneven surface disclosed in Japanese Patent Application Laid-Open No. 61-162645 does not use a fixing tool such as a screw. It is necessary to prepare a specially shaped floating prevention plate with a part that can be fitted into the insertion hole formed at one end, so it is necessary to separately design and manufacture this floating prevention plate. And the production cost of the entire U-shaped groove is increased.
Further, since the anti-floating materials in these prior arts are mainly made of metal, there arises a problem of a decrease in strength due to corrosion.
Therefore, an object of the present invention is to form a wavy shape by forming a concave portion and a convex portion extending from the bottom of the wall to the upper portion of the left and right wall side portions alternately and continuously in the longitudinal direction of the U-shaped groove. It is an object of the present invention to provide a U-shaped groove that can be manufactured more easily than a U-shaped groove provided with a conventional anti-floating material, and that is easy to attach the anti-floating material. . Further, the present invention provides a U-shaped groove which is free from the risk of water leakage due to a hole provided for attaching a floating preventing material unlike a conventional U-shaped groove, and further does not require a member or the like for mounting the floating preventing material. The task is to provide
[0004]
[Means for Solving the Problems]
The present inventors have intensively studied to solve the above problems. As a result, the wall bottom portion of the U-shaped groove main body formed into a waveform by alternately and continuously forming the concave ridge portions and the convex ridge portions extending from the wall bottom portion to the upper portions of the left and right wall side portions in the longitudinal direction of the U-shaped groove. In a part of, by devising the shape of the concave streak portion and the convex streak portion to form a support groove portion that sandwiches and supports the anti-floating material of the angle angle material, by inserting the angle angle material into that portion The present inventors have invented a U-shaped groove provided with a non-conventional floating preventing member to which the floating preventing member can be easily attached.
[0005]
That is, the present invention is a U-shaped groove main body that forms a wall having a U-shaped cross section, and alternately includes a concave portion and a convex portion extending from the bottom of the main body to the upper portions of the left and right wall sides, A hard synthetic resin or fiber reinforced comprising a U-shaped groove main body formed in a corrugated shape by being continuously formed in the longitudinal direction of the U-shaped groove, and an anti-floating material attached to a lower side of a bottom of a wall of the main body. A U-shaped groove made of resin,
The anti-floating material is made of an angled material longer than the width of the U-shaped groove, while the bottom of the wall is a groove portion through which the anti-floating material can be inserted and supported. The present invention relates to a U-shaped groove, which is provided with an anti-floating material supporting groove designed to hold both angle surface portions.
A preferred aspect of the present invention relates to a U-shaped groove, wherein the floating preventing member is attached to the U-shaped groove main body such that a bent portion of a square angle member is downward.
Still more preferably, in the present invention, the U-shaped groove further includes a bridging member fixed between the left and right wall sides of the U-shaped groove main body, and the bridging material is a flat plate or The U-shaped groove body is made of an angled material having a flat upper surface, while the left and right wall sides of the U-shaped groove body each stand vertically or outwardly from the bottom of the wall. Are formed inwardly, and the upper ends of both side walls extend outward to form a bridging material receiving portion having a flat surface, and both ends of the bridging material are connected to the bridging material. The present invention relates to a U-shaped groove fixed on a material receiving portion.
In a preferred embodiment, both ends of the bridging material are riveted to the bridging material receiving portion using rivets made of a hard synthetic resin or a fiber reinforced resin. Regarding the character groove.
Still another preferred embodiment of the present invention relates to a U-shaped groove, wherein the U-shaped groove main body is provided with rib portions protruding outward on left and right wall side portions.
A preferred embodiment of the present invention is further characterized by further comprising a reinforcing member made of a hard synthetic resin or a fiber reinforced resin, which is mounted on the bridging member receiving portion along the longitudinal direction of the U-shaped groove. .
[0006]
The U-shaped groove of the present invention is made of a hard synthetic resin or a fiber reinforced resin. In order to measure rigidity, the U-shaped groove main body alternates between a concave portion and a convex portion extending from the bottom of the wall to the upper portion of the left and right wall side portions. The U-shaped groove is continuously formed in the longitudinal direction, so that the U-shaped groove is formed into a corrugated shape, and a resin bridging material similar to that of the main body is horizontally suspended and fixed between the left and right wall sides of the main body. Is what is being done.
By attaching a bridging member that bridges both side walls of the U-shaped groove to the upper part of the U-shaped groove, which is the weakest part of the U-shaped groove, rigidity against earth pressure from outside the side wall of the synthetic resin U-shaped groove is increased. Methods for improving the performance are conventionally known (JP-A-2000-129768, JP-A-2000-104326, etc.). Most of them are obtained by attaching a metal reinforcing material at several places in the width direction. However, there is a possibility that the metal may cause a decrease in strength and a deterioration in appearance due to corrosion. However, in the present invention, such a problem does not occur because no metal is used for the bridging member.
Under the bottom of the wall of the U-shaped groove body of the present invention, an angle material, which is longer than the width of the U-shaped groove and is also made of a hard synthetic resin or a fiber-reinforced resin, is provided as a floating prevention material. In order to attach the anti-floating angle material, the U-shaped groove of the present invention is provided at the bottom of the wall with a groove portion through which the anti-float material can be inserted and supported. An anti-floating material support groove designed to hold the surface is provided. Here, the angle surface portion means a surface portion extending from the bent portion of the angled angle material right and left to the edge in the width direction thereof.
The anti-floating material supporting groove portion includes one concave portion at the bottom of the wall of the U-shaped groove main body and two convex portions adjacent to both sides thereof. The angle angle material, which is an anti-floating material, is attached to the bottom of the wall of the U-shaped groove main body so that a bent portion having a substantially L-shaped cross section is downward. For this reason, the concave portion at the bottom of the wall of the U-shaped groove body is in contact with both angle surface portions on the valley side of the angled material, and two convex portions adjacent to both sides of the concave portion are respectively On the side adjacent to the concave streak portion, the corner angles are formed so as to protrude inwardly from each other on the side adjacent to the concave streak portion so as to be able to support both the angled surfaces on the mountain side. In other words, the anti-floating material support groove has a shape capable of supporting the bent portion of the angular angle material with the bent portion downward, and sandwiching the bent portion between the concave and convex portions of the bottom of the wall of the U-shaped groove main body, and the entire shape thereof. It has a shape close to the shape of an inverted ohmic (Ω) shape.
The square angle material can be fitted by fitting into this groove and being inserted from one side to the opposite side of the U-shaped groove wall bottom.
Further, in the present invention, since a versatile square angle material having a substantially L-shaped cross section is used as the anti-floating material, which is made of a hard synthetic resin or a fiber reinforced resin, its production is easy, and sufficient strength is obtained. Have. Furthermore, since the angle angle material, which is the floating prevention material, is attached to the U-shaped groove so that the bent portion thereof is downward, when the U-shaped groove is buried, it receives more earth and sand and is more than the flat type floating prevention material. Well fixed. In addition, in the present invention, since no metal material is used, there is no problem of a decrease in strength due to corrosion. Further, the anti-floating material supporting groove does not require a fixing device for mounting the anti-floating material, and does not require a fitting member to be fitted and fixed to the anti-floating material. That is, the mounting structure of the anti-floating material in the U-shaped groove of the present invention supports the angled material as the anti-floating material, and the shape of a part of the bottom of the wall of the U-shaped groove main body which is inserted through the angled material. And a simple structure of a floating prevention member supporting groove portion. Therefore, no special process is required in the production of the U-shaped groove, and even if the anti-floating material is attached, only the work of inserting the anti-floating material into the anti-floating material support groove portion is extremely easy. It can be done quickly. Further, since the mounting does not involve the opening of the U-shaped groove, there is no need to take measures to prevent water leakage.
In another aspect of the present invention, the anti-lifting material is a U-shaped groove using a bar, a square member, a tube or a tube made of a hard synthetic resin or a fiber-reinforced resin longer than the width of the U-shaped groove. Is also good. These are generally easily available as in the case of the above angle materials.
In this case, the anti-floating material support groove portion at the bottom of the wall of the U-shaped groove main body is designed to surround and support the inserted anti-floating material.
More preferably, in the U-shaped groove main body of the present invention, the left and right wall side portions of the U-shaped groove main body formed in the corrugated shape stand vertically or outwardly from the bottom of the wall, respectively. The ridge portion does not extend to the upper end as it is, but is formed into a structure that is curved inward at the upper portion. With this structure, the upper part of the left and right side walls has a shape narrowed from the outside to the inside. Therefore, in this part, which is particularly weak due to the structure of the U-shaped groove, only the concavo-convex strip as in the related art is arranged on the side surface. Rigidity against earth pressure from various load directions can be increased more than the U-shaped groove.
Preferably, the bridging material used for the U-shaped groove body of the present invention is a bridging material after being set on the upper part of the U-shaped groove, as long as the bridging material is made of a flat plate or a square angle material having a flat upper surface. The material is safe because it does not expose sharp parts, and it looks beautiful. Further, if the fixing of both ends of the bridging member is performed by attaching the bridging member to the bridging member receiving portion by using a rivet preferably made of a hard synthetic resin or a fiber reinforced resin, the fixing by screws, bolts and nuts The installation work is much simpler and faster than in the past.
Further, the U-shaped groove main body of the present invention is provided with rib portions protruding outward on the left and right wall side portions to provide better rigidity, and further, from the wall side portion formed by the rib portions. The portion protruding outward also prevents the U-shaped groove from being lifted up by the earth and sand placed on the upper portion of the rib portion when the U-shaped groove is buried, similarly to the above-mentioned floating prevention material.
In addition, in the U-shaped groove of the present invention, a reinforcing material made of a hard synthetic resin or a fiber-reinforced resin can be attached along the longitudinal direction to the bridging member receiving portions on both upper sides of the U-shaped groove main body. . With this mounting, it is also possible to give the U-shaped groove even higher rigidity.
[0007]
【Example】
The present invention will be described in more detail with reference to the drawings. The following examples are not intended to limit the invention.
[0008]
Example 1
One embodiment of the U-shaped groove of the present invention is shown in FIGS. FIG. 1 is a view for explaining the U-shaped groove 1 of the present embodiment, FIG. 2 is a plan view of the U-shaped groove 1 shown in FIG. 1, and FIG. 3 is a side view thereof. The U-shaped groove 1 is made of various products having dimensional standards of, for example, widths of 180 mm, 240 mm, 300 mm, 400 mm, 500 mm, 600 mm, 700 mm, 800 mm, 900 mm, and 1000 mm, all of which are of a straight wall type. As is clear from FIGS. 1 to 3, in the present embodiment, the U-shaped groove body 2 made of polyethylene resin has a shape in which the left and right wall sides 4, 4 each stand upright from the wall bottom 3, respectively. Concave portions 5... And convex portions 6... Extending from the bottom portion 3 to the upper portions of the left and right wall side portions 4 and 4 are alternately and continuously formed in the longitudinal direction of the U-shaped groove 1 to form a corrugated shape. ing. As shown in FIGS. 1 and 3, an anti-floating material support groove portion 31 is formed at the bottom of the U-shaped groove main body 2, and an angle material 30 longer than the width of the U-shaped groove 1 is inserted and supported as the anti-floating material. Have been.
The U-shaped groove main body 2 may have a shape that rises vertically from the wall bottom 3 as in the present embodiment, or may have a shape that rises slightly upward toward the top. In addition, the U-shaped cross section in the present invention includes a general one that forms a concave space that forms a fluid passage, and in addition to the original U-shape, a U-shaped cross section, or a semicircular cross section with an open upper surface. Shall be included.
In this embodiment, a polyethylene resin was used as the hard synthetic resin.In addition, polyvinyl chloride, polypropylene, polyethylene terephthalate, polyamide, polyphenylene sulfide, and the like can be used. Fiber-reinforced resins (FRP, FRTP) containing fibers, organic fibers (Kevlar, etc.) and the like can be used. Further, the U-shaped groove of the present invention can be formed by blow molding, rotational molding or the like.
FIG. 4 is a cross-sectional view of the ridge portion 6 of the U-shaped groove main body 2 taken along the line AA in FIG. 2. As is clear from this figure, the ridge portion 6. , And extend to the upper ends of the left and right wall side portions 4 and 4 and extend outward to form the bridging member receiving portions 8 and 8 which are flat surfaces. However, as is clear from FIG. 5, which is a cross-sectional view of the concave portion 5 of the U-shaped groove main body 2 taken along the line BB in FIG. At the upper part of the fourth and fourth parts, while taking inwardly curved shapes 5a, they extend to the upper ends of the left and right wall side parts 4, 4 and extend outward from the upper ends to be connected to the bridging member receiving parts 8, 8. ing. As a result, the upper portions of both side walls 4 and 4 of the U-shaped groove main body 2 have a shape as a whole that is narrowed inward from the outside. This shape further increases the rigidity against earth pressure from various load directions applied to the vicinity of the upper portions of the left and right wall side portions 4 and 4 which are the weak portions of the U-shaped groove main body 2 after the U-shaped groove 1 is laid. Is to give.
As described above, the upper ends of the two side walls 4 and 4 of the U-shaped groove main body 2 extend outward in both the concave portions 5 and the convex portions 6. Material receiving portions 8 are formed. As shown in FIGS. 1 and 2, in the U-shaped groove 1 of this embodiment, on the bridging material receiving parts 8, 8, as the bridging material, a resin-made substantially L-shaped cross-sectional angle shown in FIG. 8. The material 7A can be mounted horizontally between the side walls 4,4.
Due to the horizontal suspension of the angled material 7A, the U-shaped groove 1 of the present invention can obtain higher rigidity against the earth pressure applied to the side walls 4, 4 of the U-shaped groove body 2, 2 can be prevented.
[0009]
The U-shaped groove 1 of the present invention shown in this embodiment is made of the same resin as the U-shaped groove main body 2 as shown in FIG. It is characterized by including a square angle member 30 having a substantially L-shaped cross section longer than the width of the groove 1.
As shown in detail in FIG. 7, the U-shaped groove main body 2 is configured such that a concave ridge portion 5 of a wall bottom portion 3 at a central portion thereof and two convex ridge portions 6, 6 adjacent to both sides thereof are angle-preventing floating angle materials. 30 are formed so as to form the anti-floating material support groove 31 having a structure capable of sandwiching both angle surface portions of the anti-floating member 30. In the groove portion 31, the concave portion 5 is deformed and abuts on the valley side of the L-shaped cross section of the floating prevention angle angle member 30 at a portion 35 in the drawing, and two portions on both sides of the concave portion 5 are shown. The protruding ridge portions 6 and 6 are deformed on the side adjacent to the concave ridge portion 5 so as to face each other inward so as to support the mountain side of the L-shaped cross section of the angular angle member 30 by a portion 36 in the figure. In order to take a protruding shape, it has a shape like an inverted ohmic (Ω) shape as a whole. The anti-floating angle material 30 is inserted through the groove 31 below the U-shaped groove main body wall bottom 3 from one side to the opposite side to define the width of the U-shaped groove 1, and to define the width of the U-shaped groove 1 on both wall sides. It is mounted so as to protrude outward from the parts 4,4. Therefore, there is no need for screws, bolts and nuts, or fixing tools such as rivets for attaching the floating prevention angle material 30 to the U-shaped groove main body 2. The mounting structure of the anti-floating angle material 30 of the U-shaped groove 1 of the present invention has an extremely simple configuration. Therefore, no processing is required after the U-shaped groove main body 2 of the present invention is formed, and the work of attaching the floating prevention member is very simple.
The anti-floating material supporting groove 31 may have a structure in which the anti-floating material is supported only by applying this shape to two portions, that is, a portion where the wall bottom portion 3 and the side portions 4 and 4 are in contact with each other. At the time of laying, usually, an anti-floating material support groove portion 31 is provided over the entire width direction of the U-shaped groove main body wall bottom portion 3 so that the mounting operation for inserting the angled angle member 30 is easy. Further, in this embodiment, one floating prevention angle angle member 30 is provided for one U-shaped groove main body 2, but two or more angle angle members 30 can be installed according to the length of the U-shaped groove. It can be designed as follows.
When the U-shaped groove 1 is laid, the floating prevention effect is obtained by the earth and sand deposited on the part of the floating prevention angle angle member 30. In the present invention, in particular, since the angle preventing member 30 made of a hard synthetic resin or a fiber reinforced resin is used as a floating preventing material, there is no possibility of a decrease in strength due to corrosion unlike a metal floating preventing material, and its shape is It is stronger than a flat floating prevention material and has sufficient strength even if it is made of synthetic resin or the like. Further, in the present invention, the floating angle preventing member 30 is attached to the wall bottom 3 of the U-shaped groove main body 2 so that the bent portion thereof is downward, so that at the time of embedding, the angle preventing member is more than the flat floating preventing member. The earth and sand can be received more reliably, and the U-shaped groove is better fixed. In this embodiment, the same resin as that of the U-shaped groove main body 2 is used. However, various hard synthetic resins or the like different from the U-shaped groove main body 2 can be used as the floating prevention angle angle member 30 as a matter of course.
[0010]
As shown in FIG. 21, a tube material 40 longer than the width of the U-shaped groove 1 can be used as the floating prevention material in addition to the angle angle material 30. This pipe member 40 is also made of the same or different hard synthetic resin or fiber-reinforced resin as the U-shaped groove main body 2. FIG. 21 also shows an anti-floating material support groove 41 provided on the bottom wall 3 of the U-shaped groove body 2 and designed to surround and support the anti-floating tube 40. The anti-floating material support groove portion 41 forms a round cavity between two portions of the wall bottom portion 3 so that the anti-floating tube material 40 to be inserted can be held by the wall bottom portion 3 of the U-shaped groove main body 2. The lower end is formed by portions 3a, 3a which are inwardly deformed so as to surround and support the anti-floating material.
In addition to the above-described tube member 40, a resin bar, a square member, a tubular member, or the like may be used as the anti-floating material in an embodiment in which such an anti-floating material supporting groove is used.
[0011]
As shown in FIG. 8, in this embodiment, as a bridging material for the U-shaped groove 1, a square angle material having the same material as the U-shaped groove main body 2 and having the same material as the U-shaped groove main body 2 having holes 7 a, 7 a drilled at both ends. Use 7A. The angle material 7A is disposed in the flat bridging material receiving portions 8, 8 at the upper ends of the two side walls 4, 4 of the U-shaped groove main body 2 described above, and is horizontally mounted between the two side walls 4, 4. Can be installed as
As is clear from FIGS. 1 and 2, etc., the right and left bridging member receiving portions 8, 8 are paired with holes 8a at regular intervals in the longitudinal direction at positions above the convex portions 6. 9 and 10, the corner angle member 7A can be attached to this portion as shown in FIGS. In this embodiment, since the U-shaped groove main body 2 itself has a portion for receiving the bridging material, other auxiliary members for disposing the bridging material are not required when using the bridging material.
The square angle material 7A is aligned with the holes 7a, 7a formed at both ends thereof and the holes 8a, 8a of the bridging material receiving portion, and riveted with rivets 9 to attach the upper portion of the U-shaped groove body 2 to the upper portion. Can be fixed. The rivet 9 has a shape shown in FIG. 11 and is made of a resin made of the same material as that of the U-shaped groove main body 2, but other hard synthetic resin or fiber reinforced resin can also be used. The use of the rivets 9 makes it very easy to attach the bridging material as compared with the case of using screws, bolts, nuts and the like.
The surface of the L-shaped angled material 7A shown in FIG. 8 (c) without the hole 7a is cut at both ends, and is shorter than the surface with the hole 7a (FIG. 8 (b)). Designed. Therefore, the surface without the hole 7a (FIG. 8C) can be attached in the U-shaped groove main body 2 downward. For this reason, after the square angle member 7A is attached to the U-shaped groove main body 2, since the square angle member 7A also does not protrude from the upper surface of the U-shaped groove, there is no danger that an operator may be injured by the protruding portion, and the appearance is beautiful. . The bridging material can also be used in the form of a flat plate having fixing holes at both ends in addition to the shape of the above-mentioned angled material.
[0012]
In the U-shaped groove 1 of the present embodiment, as the bridging material, instead of or in combination with the above-described angled angle material 7A that can be fixed with the rivet 9, the upper part of the inside of the wall sides 4, 4 of the U-shaped groove main body 1 A bridging material receiving portion can be formed on the bridging member, and another bridging material that can be fitted into the bridging material receiving portion can be used. The mounting of the bridging member to the U-shaped groove main body does not require fixing devices such as screws, bolts and nuts, and rivets, so that the mounting can be performed quickly. Moreover, the bridging member receiving portion formed in the U-shaped groove main body 2 is also a part of the structure of the U-shaped groove main body 2 and is formed at the same time as the molding thereof. No auxiliary member is required.
In the present embodiment, as shown in FIG. 2, the U-shaped groove main body 2 is designed such that a resin angled material 7B made of the same material as the U-shaped groove main body 2 shown in FIG. 12 can be used. That is, as is apparent from FIGS. 1, 14 and 15, the U-shaped groove main body 2 has a substantially L-shaped receiving concave portion 10 corresponding to the angular angle material 7B as a bridging material receiving portion. Four, four concave portions 5 are formed in the upper part. More specifically, as shown in FIG. 1 and FIGS. 13 to 15, upper portions of the right and left wall side portions 4, 4 of the U-shaped groove main body 2 are inwardly curved in concave groove portions 5. 5a are partly warped inward at regular intervals with respect to the longitudinal direction of the U-shaped groove 1, and extend to the upper end together with the adjacent ridge portions 6 on both sides. A substantially L-shaped receiving recess capable of receiving an end of the angled angle material 7B as a bridging material receiving portion at the same time as the bridging material receiving portion on the flat wall side portion 5b. 10 are provided.
FIG. 13A shows a state as viewed from the outside of the U-shaped groove main body wall side 4 in which the angled angle member 7B is fitted into the receiving recess 10, and FIG. 13B shows the same state as the wall side 4. It is the figure seen from the inside (the enlarged view of the circle A part of Drawing 13 (a)). The shape of the receiving recess 10 is substantially L-shaped surrounding the shape of the cross section at the end of the angled material 7B, and an opening 10a is provided at the upper part of this shape. The opening 10a facilitates the fitting of the angle angle member 7B, and is easy to remove when foreign matter such as earth and sand enters the receiving recess 10 during the installation work of the U-shaped groove 1.
Since the angle material 7B, which is a bridging member, is used with its bent portion having the mountain side facing up, its sharp edge does not protrude from the upper surface of the U-shaped groove after being attached to the U-shaped groove main body 2, and the work site In this case, there is no risk of the worker being injured by the projecting portion of the bridging member, and the appearance is beautiful.
[0013]
As another bridging material that can be used in place of the above-described angled angle material 7A or that can be used in combination with the U-shaped groove wall side portions 4, 4, a tube material 7C shown in FIG. 16 can be used. . FIG. 17 shows the structure of the U-shaped groove 1 when the pipe C is used as a bridging member. The U-shaped groove main body 2 shown in FIG. 17 also includes a concave portion 5 and a convex portion 6 that extend from the wall bottom 3 to the upper portions of the left and right wall side portions 4 and 4 alternately. By being continuously formed in the longitudinal direction, it is formed into a corrugated shape, and the concave portions 5 take an inwardly curved shape 5a at the upper portions of the left and right wall side portions 4, 4. In this embodiment, as shown in FIGS. 17 to 19, a part of the inwardly curved shape 5a in the concave streak portion 5 is formed at a constant interval in the longitudinal direction of the U-shaped groove 1. The projections 11a to which the pipe member 7C as the bridging member can be fitted are formed so as to form a pair at the upper portions of the left and right wall side portions 4 and 4, and fitted to the lower side of each of the projections 11a. The bridge member support portion 11b for supporting the formed tube member 7C is formed. That is, the convex bridging material receiving portions 11, 11 for fitting both ends of the tubular material C, which is the bridging material, are composed of the protrusions 11a, 11a and the bridging material support portions 11b, 11b.
In this embodiment, a hollow rectangular tube 7C made of the same material as the U-shaped groove main body 2 as shown in FIG. 16 is used, but the bridging member is inserted into a tube, a tube, or both ends of another shape. The shape of the shaft member or the like forming the hole may be used, and the shapes of the protruding portions 11a and the bridging material support portions 11b are designed according to the shape of the bridging material to be used.
As described above, the square angle member 7A, the square angle member 7B, or the pipe member 7C, which is the bridging material in the U-shaped groove 1 of the present invention, is made of a hard synthetic resin or a fiber-reinforced resin, so that it is made of a conventional metal bridging. Unlike the passing material, it does not cause a decrease in strength and a deterioration in appearance due to corrosion. Further, the example in which each of the bridging members is the same resin as the U-shaped groove main body 2 has been described, but a hard synthetic resin or a fiber-reinforced resin different from the U-shaped groove main body 2 may be used.
In this way, the U-shaped groove 1 of the present invention can be formed on both walls of the U-shaped groove main body 2 by transversely using the bridging material 7A, 7B or 7C alone or in combination with the bridging material 7A. Even higher rigidity can be obtained with respect to the earth pressure applied to the side portions 4, 4, and deformation of the U-shaped groove main body 2 can be prevented.
[0014]
As shown in FIGS. 1 to 3 and the like, the U-shaped groove main body 2 of the present invention described in the above-described embodiment is also provided with concave streaks at a certain interval from slightly lower portions of the left and right wall side portions 4, 4. The rib portions 15 projecting outward over the portions 5 and the projecting ridge portions 6 are provided to give the U-shaped groove main body 2 even more rigidity. The ribs 15 also project outward from the U-shaped groove wall side parts 4 and 4 when buried in the soil, where sediment accumulates and the load is applied. Therefore, the U-shaped groove main body 2 is prevented from floating.
Further, as shown in FIGS. 2 and 3, one end of the U-shaped groove main body 2 of this embodiment is an external fitting connection portion 2a whose inner wall is designed to be slightly larger than other portions. The other U-shaped groove main body 2 is designed so that the other end portion can be connected to the other U-shaped groove main body 2 as an inner fitting connection portion 2b. When connecting two U-shaped groove main bodies, the outer fitting connection portion 2a is fitted so as to cover the inner fitting connection portion 2b including the rib portion 15. In addition, in the connection method, in order to minimize water leakage at the connection part, the direction of water flow is from the inner fitting connection part 2b of the U-shaped groove body 2 to the outer fitting connection part 2a of the other U-shaped groove body 2. It is preferable that the connection be made as follows.
[0015]
In order to further increase the rigidity, the U-shaped groove 1 of the present invention further includes a reinforcing member 20 which is the same material as the U-shaped groove main body 2 and is a square angle material having a substantially L-shaped cross section as shown in FIG. It can also be used by being mounted in the longitudinal direction on the bridging member receiving portions 8 at the upper ends of both side walls of the two. Since holes 20a are formed in one surface of the reinforcing member 20, the holes 20a are aligned with the holes 8a of the bridging member receiving portions 8, 8, and then mounted. The holes 7a, 7a at both ends of the angle member 7A can also be aligned and placed on the bridging receiving portions 8, 8, and can be simultaneously fixed by the rivets 9.
[0016]
【The invention's effect】
As is apparent from the above description, the present invention provides, as a floating prevention material, a synthetic resin or the like longer than the width of the U-shaped groove below the bottom of the wall of the U-shaped groove main body formed into a corrugated shape as described above. A U-shaped groove provided with a square angle member consisting of: The U-shaped groove body itself is provided with an anti-floating material support groove portion which can insert and support the anti-floating material at the bottom of the wall for mounting. Have been. Therefore, the U-shaped groove of the present invention does not require a member for fixing the anti-floating member unlike the prior art, and is advantageous in manufacturing cost. Furthermore, since the mounting of the anti-floating material is simply performed by simply fitting the anti-floating material from the one side to the opposite side from the anti-floating material support groove at the bottom of the U-shaped groove, the mounting operation at the time of the U-shaped groove is extremely easy and quick. Can be done. Also, since the mounting does not involve the opening of the U-shaped groove, there is no risk of water leakage due to the hole.
Further, in the present invention, since the anti-floating material is a square angle material, it has sufficient strength even if it is made of a synthetic resin or the like, and furthermore, it has a U-shape so that the bent portion of the square angle material is downward. Because it is mounted in the groove, it receives more earth and sand when buried than a flat anti-floating material, and is better fixed.
In addition to the above-mentioned square angle materials, as surfacing prevention materials, various versatile members such as resin rods, square materials, pipe materials or cylindrical materials are used, and correspondingly, the U-shaped groove body is used. The same effect as in the case of using a square angle material can also be obtained by designing and forming the anti-floating material support groove so that the bottom of the wall can surround and support the anti-floating material.
Still further, the U-shaped groove of the present invention is formed by alternately forming concave portions and convex portions extending from the bottom of the wall of the U-shaped groove main body to the upper portions of the left and right side walls alternately in the longitudinal direction of the U-shaped groove. Has a structure including a U-shaped groove main body formed into a corrugated shape, and a bridging member that is horizontally suspended and fixed between the left and right wall sides of the main body. Despite being a U-shaped groove made of a hard synthetic resin or a fiber reinforced resin, it is not inferior to the case of using a conventional metal bridging material, and from various directions applied near the upper portions of the left and right walls. Has sufficient rigidity against earth pressure load. In addition, the strength of each member does not decrease and the appearance does not deteriorate due to corrosion of the metal.
In particular, if the shape of the U-shaped groove main body of the present invention is such that the left and right wall side portions rise vertically or outwardly from the bottom of the wall, but if the concave portion is formed by warping inward at the upper portion, The shape of the U-shaped groove body is narrowed inward from the outside at the upper part on both side walls, so that the left and right walls are more than the conventional U-shaped groove in which only the concave and convex strips are arranged from the bottom to the upper end of the side surface. In the vicinity of the upper part of the side, high rigidity is obtained against earth pressure from various load directions. Furthermore, in this case, since the upper ends of the side walls extend outward to form a bridging material receiving portion having a flat surface, the bridging material can be bridged without using an auxiliary member for bridging the bridging material. Both ends of the bridge can be fixed on the bridge receiving portion as they are. Further, if the bridging material of the present invention is made of a flat plate or a square angle material having a flat upper surface, the bridging material after being installed on the upper part of the U-shaped groove does not expose a sharp portion. Therefore, there is no risk of injuring the worker, the safety is ensured, and the appearance is beautiful.
Furthermore, if fixing of the bridging material to the bridging material receiving portion is performed by rivet using a rivet made of a synthetic resin or the like as in the case of the U-shaped groove, it is possible to use screws, bolts and nuts. As described above, the bridging member can be attached very simply and quickly without making the fixing work complicated.
Further, the U-shaped groove body of the present invention is provided with rib portions protruding outward on the left and right wall side portions, so that the U-shaped groove of the present invention provides more rigidity. The portion protruding outward from the side of the wall to be fixed also fixes the U-shaped groove by the earth and sand placed on the upper part of the rib portion when the U-shaped groove is buried in the same manner as the above-mentioned floating prevention material, and prevents the U-shaped groove from rising. The effect is obtained.
In addition, a reinforcing material made of resin can be installed along the longitudinal direction of the U-shaped groove in the bridging member receiving portion on the upper side of both walls of the U-shaped groove of the present invention. It is also possible to provide even higher rigidity.
Therefore, the present invention can provide a U-shaped groove made of a synthetic resin, which is easy to attach the anti-floating material and is lightweight but has high rigidity.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating one embodiment of a U-shaped groove of the present invention.
FIG. 2 is a plan view of a U-shaped groove showing one embodiment of the U-shaped groove of the present invention.
FIG. 3 is a side view of the U-shaped groove shown in FIG. 2;
FIG. 4 is a cross-sectional view of a ridge portion of the U-shaped groove main body cut along the line AA in FIG. 2;
FIG. 5 is a cross-sectional view of a concave portion of the U-shaped groove main body cut along a line BB in FIG. 2;
FIGS. 6A and 6B are a plan view (a) and a front view (b) of a square angle member as a floating prevention member of a U-shaped groove according to the present invention.
FIG. 7 is a view showing a state in which the square angle member of FIG. 6 is inserted into a floating prevention member support groove at the bottom of the U-shaped groove main body wall.
FIG. 8 is a plan view (a), a front view (b), and a side view (c) of a square angle material as a bridging material that is laid across the U-shaped groove of the present invention.
FIG. 9 is a partial view of a state in which the angle member of FIG. 8 is bridged in the bridge member receiving portion of the U-shaped groove main body as viewed from above.
FIG. 10 is a sectional view taken along line CC of FIG. 9;
FIG. 11 is a plan view (a) and a front view (b) of a rivet for fixing a corner angle material.
FIG. 12 is a front view (a) and a side view (b) of a corner angle material as an example of another bridging material.
FIG. 13 (a) is a view of the state in which the corner angle member of FIG. 12 is fitted into the receiving recess viewed from the outside of the U-shaped groove main body wall side, and FIG. It is an enlarged view (b).
FIG. 14 is a partial view from above showing a state in which the angle member of FIG. 12 is fitted into a receiving recess of a U-shaped groove main body.
FIG. 15 is a sectional view taken along the line DD in FIG. 14;
FIG. 16 is a front view (a) and a side view (b) of a tube as another example of another bridging member.
FIG. 17 is a view illustrating another embodiment of a U-shaped groove designed to use the tube shown in FIG. 16;
FIG. 18 is a partial view from above showing a state in which the tube material shown in FIG. 16 is fitted to the bridging member receiving portion of the U-shaped groove main body.
FIG. 19 is a sectional view taken along line EE of FIG. 18;
FIG. 20 is a plan view (a) and a front view (b) of a reinforcing member mounted on the bridging member receiving portion along the longitudinal direction of the U-shaped groove.
FIG. 21 is a diagram showing a state in which a tube is inserted into a floating prevention member supporting groove when a tube is used as a floating prevention member.
[Explanation of symbols]
1 U-shaped groove
2 U-shaped groove body
3 Wall bottom
4 Wall side
5 concave stripes
5a Inwardly curved shape
6 ridge section
7A square angle material
7B square angle material
7C pipe material
8 Bridge material receiving section
9 rivets
10 Receiving recess
11a protrusion
11b Bridging material support
15 ribs
20 Reinforcement
30 Anti-floating angle material
31, 41 Anti-floating material support groove
40 Anti-floating tubing

Claims

A U-shaped groove main body forming a wall having a U-shaped cross section, wherein a concave portion and a convex portion extending from the bottom of the main body to the upper portions of the left and right wall side portions are alternately arranged in a longitudinal direction of the U-shaped groove. A U-shaped groove made of a hard synthetic resin or a fiber reinforced resin, comprising a U-shaped groove body formed into a corrugated shape by being formed continuously, and an anti-floating material attached below the bottom of the wall of the main body. And
The anti-floating material is made of an angled material longer than the width of the U-shaped groove, while the bottom of the wall is a groove portion through which the anti-floating material can be inserted and supported. A U-shaped groove comprising a floating prevention member supporting groove designed to hold both angle surface portions.

2. The U-shaped groove according to claim 1, wherein the floating prevention member is attached to the U-shaped groove main body such that a bent portion of the angle angle material is downward. 3.

The U-shaped groove further includes a bridging member that is horizontally suspended and fixed between the left and right wall sides of the U-shaped groove main body, and the bridging material is a flat angled material having a flat upper surface. On the other hand, the left and right wall sides of the U-shaped groove main body respectively stand vertically or outwardly from the bottom of the wall, and at the top thereof, the concave portion is formed to warp inward to increase rigidity, and The upper ends of both wall side portions each extend outward to form a bridging material receiving portion having a flat surface, and both ends of the bridging material are fixed on the bridging material receiving portion. The U-shaped groove according to claim 1, wherein:

The U-shaped groove according to claim 3 , wherein both ends of the bridging member are riveted to the bridging member receiving portion using rivets made of a hard synthetic resin or a fiber reinforced resin.

The U-shaped groove according to claim 1, wherein the U-shaped groove main body is provided with rib portions protruding outward on left and right wall side portions.