JP3978379B2

JP3978379B2 - Diverging facilities for snow drift grooves

Info

Publication number: JP3978379B2
Application number: JP2002216189A
Authority: JP
Inventors: 敬二山本; 隆柴崎; 稔卯野
Original assignee: 丸島産業株式会社; 大石田町; 株式会社菅野測量設計
Priority date: 2002-07-25
Filing date: 2002-07-25
Publication date: 2007-09-19
Anticipated expiration: 2022-07-25
Also published as: JP2004060166A

Description

【０００１】
【発明の属する技術分野】
本発明は、流雪溝の分岐設備に関する。
【０００２】
【従来の技術】
豪雪地帯においては、道路などに積もった雪塊は、道路の側部などに設けられている流雪溝に投入して、この流雪溝で流水とともに下流側に流し去るようにしている。
【０００３】
このような流雪溝は、道路に沿って町中を網の目状に巡らされていることから、流雪溝からＹ字状やＴ字状で分岐する分岐流雪溝が到る所に設けられている。
【０００４】
ところで、流雪溝では流水とともに雪塊を下流側に流し去るようにして、分岐流雪溝には流水だけを流すことにより、分岐流雪溝に雪塊を投入して、この分岐流雪溝でも流水とともに雪塊を下流側に流し去るようにしている。
【０００５】
このため、流雪溝と分岐流雪溝との分岐部分に、分岐流雪溝には流水だけを流せるようにした分岐設備を設けることが本出願人によって提案されている（特願２００１−１１２５７５号参照）。
【０００６】
上記分岐設備は、流雪溝を閉じる位置と分岐流雪溝を閉じる位置とに相対的に可動するゲートであり、このゲート下部開口をシャッターで開閉できるようにしている。
【０００７】
そして、ゲートで分岐流雪溝を閉じてシャッターで下部開口を開くと、雪塊は流水の水面近くに浮かんだ状態であるから、下部開口から流水だけが分岐流雪溝に流れ込むようになる。
【０００８】
【発明が解決しようとする課題】
しかしながら、流雪溝が急勾配であるような場合には、流水の流速が非常に早くなるので、ゲートの下部開口から流水が分岐流雪溝に流れ込みにくくなるという問題があった。
【０００９】
また、流雪溝の流水の水位が下がったような場合には、ゲートの下部開口が雪塊で塞がれて雪塊が渋滞し、流水が分岐流雪溝に流れ込みにくくなるという問題もあった。
【００１０】
本発明は、上記問題を解消するためになされたもので、分岐流雪溝に流水を流れ込みやすくして、分岐流雪溝に常に適正な分水量を確保できるようにした流雪溝の分岐設備を提供することを課題とするものである。
【００１１】
【課題を解決するための手段】
上記課題を解決するために、本発明は、流水とともに雪塊を流し去るための流雪溝と、この流雪溝から分岐する分岐流雪溝との分岐部分に設けられる分岐設備であって、上記分岐部分にピットが形成され、このピットの底部に、流雪溝の底部よりも低くなるように凹ませたインバートが形成され、このインバートと上記分岐流雪溝とが連通されるとともに、上記ピット内に、流雪溝の上流側と下流側とを繋ぐ略Ｕ字形状に成形された水路部材が橋架され、この水路部材の底部に、水路部材内の流水を上記インバートから分岐流雪溝に分水する分水用開口が形成されていることを特徴とする流雪溝の分岐設備を提供するものである。
【００１２】
本発明によれば、分岐部分のピット内では、流雪溝を繋ぐように架橋された水路部材（流雪溝の一部）で流水とともに雪塊が流し去られるとともに、水路部材の底部の分水用開口から流水だけがピット底部のインバートから分岐流雪溝に分水されて流れ込むようになる。
【００１３】
この水路部材の分水用開口は底部に形成されていることから、流雪溝が急勾配で、流水の流速が非常に早くなったとしても、流水が底部の分水用開口から分岐流雪溝に流れ込みやすくなる。また、流雪溝の流水の水位が下がったとしても、雪塊は流水の水面近くに浮かんだ状態であるから、底部の分水用開口が雪塊で塞がれて雪塊が渋滞するおそれがなくなって、分水用開口から流水だけが分岐流雪溝に流れ込むようになる。これらのことから、分岐流雪溝に常に適正な分水量を確保できるようになる。
【００１４】
請求項２のように、上記水路部材の底部に、上記分水用開口を開閉可能なシャッター部材が設けられていると、分水量を調整することができる。
【００１５】
請求項３のように、上記水路部材の底部に、上記分水用開口の下流側に位置して上下動可能な可動堰部材が設けられていると、流雪溝の一部である水路部材内の水位が下がったときに、可動堰部材を堰高にして水位を上げることにより、分水用開口が雪塊で塞がれて雪塊が渋滞するおそれがなくなる。
【００１６】
請求項４のように、上記可動堰部材に対応する水路部材の底部に、排砂用開口が形成され、この可動堰部材は、排砂用開口を開放できるように下流側が取り外し可能であると、可動堰部材の下流側を取り外して排砂用開口を開放することにより、ピットのインバートに堆積した砂を分水の水流によって排砂用開口から流雪溝に排出できるようになる。
【００１７】
請求項５のように、上記ピットのインバートは、上下流方向に湾曲されていると、水利特性が向上するとともに、堆積した砂をスムーズに排出できるようになる。
【００１８】
請求項６のように、上記水路部材の側部に、水路部材内の流水を上記分岐流雪溝に分水する緊急分水用開口が形成されるとともに、この緊急分水用開口を開閉可能なゲートが設けられていると、水路部材の下流側の流雪溝で雪塊が渋滞しているような緊急時に、水路部材の分水用開口をバイパスして、上流側の流雪溝から流水とともに雪塊を直接に分岐流雪溝に流し去ることができる。
【００１９】
請求項７のように、上記水路部材内に、分水用開口に引っ掛かったゴミを引っ掛けて上方に持ち上げ可能なゴミ取り部材が設けられていると、分水用開口に引っ掛かったゴミは、ゴミ取り部材で水面上に持ち上げて簡単に取り除くことができる。
【００２０】
【発明の実施の形態】
以下、本発明の実施の形態を図面を参照して詳細に説明する。
【００２１】
図１は流雪溝の分岐設備の平面図、図２は側面図、図３は図２のＡ−Ａ線断面図である。
【００２２】
流水とともに雪塊を流し去るための流雪溝１と、この流雪溝１から分岐する分岐流雪溝２との分岐部分には、有底四角形状のピット３が形成されている。この流雪溝１と分岐流雪溝２には、通常はコンクリート蓋が落とし込まれて暗渠になっており、ピット３には、格子状のグレーチィングが落とし込まれて閉じられている。
【００２３】
上記ピット３の底部には、流雪溝１の底部１ａよりも低くなるように凹ませたインバート４が形成され、このインバート４は、上下流方向に湾曲されている（図２参照）。このインバート４の底部４ａは、上記分岐流雪溝２の底部２ａとほぼ一致するように形成され、これによってインバート４と分岐流雪溝２とが段差なく連通されるようになる（図３参照）。また、分岐流雪溝２とは反対側のインバート４の底部４ａは傾斜面４ｂに形成されている。
【００２４】
上記ピット３内には、図４および図５にも示すように、上流側と下流側の流雪溝１を繋ぐ水路部材６が橋架されている。この水路部材６は、例えばステンレス板で略Ｕ字形状に成形されて、上流側端部と下流側端部とが、ピット３の上流側開口３ａと下流側開口３ｂとに嵌め込まれた状態でフランジ部６ａがそれぞれ固定されている。
【００２５】
上記水路部材６の底部６ｂの上流側には、幅方向に一定のピッチで上下流方向に延在するスリット状の分水用開口６ｃが形成されている。本例では、幅方向に６個の分水用開口６ｃが形成されている。上記底部６ｂの下面の分水用開口６ｃの上下流方向の両側位置には、スペーサ６ｄが固定され、上流位置のスペーサ６ｄにはストッパー溝６ｅが形成されている（図６参照）。
【００２６】
上記水路部材６の底部６ｂの下流側には、排砂用開口６ｆが形成されるとともに、この排砂用開口６ｆの下流側に位置する水路部材６の両側部６ｇには、底部６ｂの上面と所定の隙間を隔てて内方に突出するガイド６ｈが取付けられている。また、排砂用開口６ｆの上下流方向のほぼ中間に位置する水路部材６の両側部６ｇの下部には、上下方向の長穴６ｉが形成されるとともに、この長穴６ｉの上方に位置する水路部材６の両側部６ｇの上部には、上下方向に一定のピッチ（例えば２５ｍｍ）で係止溝７ａを形成した係止部材７が取付けられている。
【００２７】
上記水路部材６の上流側の底部６ｂのスペーサ６ｄの間には、分水用開口６ｃと同じピッチで開口９ａを形成したシャッター部材９が配置され、このシャッター部材９は、図６および図７にも示すように、上記スペーサ６ｄに固定したガイドプレート１０で底部６ｂとの間で幅方向にスライド可能に支持されている。
【００２８】
そして、シャッター部材９の開口９ａが分水用開口６ｃと一致する開スライド時には、水路部材６内の水流を各開口６ｃ，９ａからインバート４の方向に分水するとともに、シャッター部材９の開口９ａが分水用開口６ｃと一致しない閉スライド時には、水路部材６内の水流を分流しないでそのまま下流側の流雪溝１に流し去るようになる。
【００２９】
上記シャッター部材９の側部には、上記スペーサ６ｄのストッパー溝６ｅ内に入るストッパー部９ｂが形成され、このストッパー部９ｂによりシャッター部材９が開閉位置でストップされるようになる。
【００３０】
上記シャッター部材９の幅方向の一端部にはピン９ｃが取付けられるととともに、上記水路部材６の一方（分岐流雪溝２の反対側）の側部６ｇの外面には上下のブラケット１１でシャッター操作軸１２が支持されて、このシャッター操作軸１２の下端部に取付けたレバー１３の長穴１３ａに上記シャッター部材９にピン９ｃが係合されている。また、シャッター操作軸１２の上端部には、図１３（ａ）（ｂ）に示したようなＴ型ハンドル１４の角穴１４ａを上方から差し込み可能な角部１２ａが形成されている。
【００３１】
そして、Ｔ型ハンドル１４の角穴１４ａを角部１２ａに差し込んで、Ｔ型ハンドル１４を一方回りに回転させると、シャッター操作軸１２が同回り（図６（ｂ）において左回り）に回転されて、レバー１３の長穴１３ａとピン９ｃを介してシャッター部材９が閉スライドするとともに、逆に、Ｔ型ハンドル１４を他方回りに回転させると、シャッター操作軸１２が同回り（図６（ｂ）において右回り）に回転されて、レバー１３の長穴１３ａとピン９ｃを介してシャッター部材９が開スライドするようになる。このシャッター部材９の開閉スライド位置は、Ｔ型ハンドル１４の回転操作量で微調整することができる。
【００３２】
上記水路部材６の排砂用開口６ｆの上部には、この排砂用開口６ｆを塞ぐ可動堰部材１６が配置されている。この可動堰部材１６は、図８および図９にも示すように、上記水路部材６の両側部６ｇの内幅とほぼ同じ外幅に形成されて、山形に湾曲させた湾曲板１６ｂと、この湾曲板１６ｂの上流側にヒンジ部１７ｂで連結された前平板１６ａと、上記湾曲板１６ｂの下流側にヒンジ部１７ｃで連結された中間平板１６ｃと、この中間平板１６ｃにヒンジ部１７ｄで連結された後平板１６ｄとで構成されている。
【００３３】
上記前平板１６ａの先端部は水路部材６の底部６ｂにヒンジ部１７ａで固定されるとともに、上記後平板１６ｄは、上記排砂用開口６ｆの下流側に位置する水路部材６の両側部６ｇの底部６ｂの上面とガイド６ｈとの間に上流側から差し込まれている。
【００３４】
そして、湾曲板１６ｂが水流圧で水路部材６の底部６ｂに押し付けられている状態（最低堰高…図２の実線および図８（ｂ）の二点鎖線ａ参照）から、後述する堰操作軸２０の操作で湾曲板１６ｂを徐々に上動させると、これに追従して各平板１６ａ，１６ｃ，１６ｄが各ヒンジ部１７ａ〜１７ｃで折れながら、後平板１６ｄがガイド６ｈでガイドされて上流側方向に移動するようになる（最高堰高…図８（ｂ）の実線ｂおよび図９（ｂ）参照）。
【００３５】
上記可動堰部材１６の下流端の後平板１６ｄは、底部６ｂの上面とガイド６ｈとの間から上流方向に抜き取りできるようになっていて、この抜き取りによって、上記水路部材６の排砂用開口６ｆを開放できるようになる。
【００３６】
上記湾曲板１６ｂの下面には幅方向に延在する湾曲状ブロック１８が差し込まれ、この湾曲状ブロック１８の両端のピン１８ａが上記水路部材６の両側部６ｇの長穴６ｉに係合されて外方に突出されている。この外方に突出された各ピン１８ａには、長穴６ｉからの水洩れを防止するシール部材１９が固定され、この各シール部材１９には、堰操作軸２０の下端部が取付けられている。また、堰操作軸２０の上端部には、図８（ｂ）および図９（ａ）に示したように、上記係止部材７の上下方向の係止溝７ａのいずれか１つに係合可能なＬ字状フック部２０ａが形成されている。
【００３７】
そして、図８（ｂ）に二点鎖線で示したようなフック状操作レバー２１を堰操作軸２０のフック部２０ａに引っ掛けて、係止部材７の上下方向の係止溝７ａのいずれか１つに係合させるように操作することで、可動堰部材１６の堰高を段階的に調整できるようになる。
【００３８】
図１〜図３に戻って、上記分水用開口６ｃが位置する水路部材６の他方（分岐流雪溝２と同じ側）の側部６ｇには緊急分水用開口６ｊが形成されるとともに、この緊急分水用開口６ｊには、下流側のゲート操作軸２４を中心にして、緊急分水用開口６ｊを閉じる閉じ位置（実線ｃ参照）と、水路部材６内に揺動して緊急分水用開口６ｊを開く開き位置（二点鎖線ｄ参照）とに開閉可能な旋回式のゲート２５が設けられている。
【００３９】
このゲート操作軸２４の上端部には、図１３（ａ）（ｂ）に示したようなＴ型ハンドル１４の角穴１４ａを上方から差し込み可能な角部２４ａが形成されていて、Ｔ型ハンドル１４の角穴１４ａを角部２４ａに差し込んで、Ｔ型ハンドル１４を一方回りに回転させると、ゲート操作軸２４が同回り（図１において左回り）に回転されて、ゲート２５が開き旋回するとともに、逆に、Ｔ型ハンドル１４を他方回りに回転させると、ゲート操作軸２４が同回り（図１において右回り）に回転されて、ゲート２５が閉じ旋回するようになる。なお、このゲート２５は閉じまたは開き位置に水流圧で自然に保持されるようになる。
【００４０】
図１１および図１２に示すように、上記旋回式のゲート２５に代えて、緊急分水用開口６ｊには、水路部材６の他方（分岐流雪溝２と同じ側）の側部６ｇに取付けたガイドレール２６で、緊急分水用開口６ｊを閉じる閉じ位置と、上方にスライドして緊急分水用開口６ｊを開く開き位置（二点鎖線ｄ参照）とに上下開閉可能なスライド式のゲート２５を設けても良い。
【００４１】
このスライド式のゲート２５の外面側には、ゲート操作ねじ軸２７の下端部が固定され、このゲート操作ねじ軸２７の中間部は、水路部材６の他方（分岐流雪溝２と同じ側）の側部６ｇに取付けたナット部材２８に螺合されて、上端部には、図１３（ａ）（ｂ）に示したようなＴ型ハンドル１４の角穴１４ａを上方から差し込み可能な角部２７ａが形成されていて、Ｔ型ハンドル１４の角穴１４ａを角部２７ａに差し込んで、Ｔ型ハンドル１４を一方回りに回転させると、ゲート操作ねじ軸２７が同回り（図１１において左回り）に回転されて、ゲート２５が開きスライド（上動）するとともに、逆に、Ｔ型ハンドル１４を他方回りに回転させると、ゲート操作ねじ軸２７が同回り（図１１において右回り）に回転されて、ゲート２５が閉じスライド（下動）するようになる。
【００４２】
図１０に示すように、略Ｕ字形状のゴミ取り部材３３を設けて、このゴミ取り部材３３の両上端部は、上記水路部材６内で両側部６ｇにピン３４で上下揺動可能に取付けるとともに、下揺動位置で水路部材６の底部６ｂの上面すれすれに設定した下部の引っ掛け部３３ａの前端部は傾斜面に形成されている。
【００４３】
このゴミ取り部材３３は、図１０（ｂ）の実線ｅの下揺動位置では、引っ掛け部３３ａが水路部材６の分水用開口６ｃの下流端に臨んで、分水用開口６ｃの下流端に引っ掛かるゴミが同時に引っ掛け部３３ａにも引っ掛かるようにしている。
【００４４】
上記のように構成した流雪溝１の分岐設備の作用を次に説明する。通常時は、水路部材６の分水用開口６ｃはシャッター部材９で閉じられ、緊急分水用開口６ｊはゲート２５で閉じられ、可動堰部材１６は最低堰高に調整され、ゴミ取り部材３３は下揺動位置に下揺動されている。
【００４５】
そして、上流側の流雪溝１から流水とともに流れてきた雪塊は、流雪溝１の一部である水路部材６内を通って下流側の流雪溝１に流し去られるようになる。
【００４６】
この状態で、分岐流雪溝２に流水のみを分水する必要が生じた時には、Ｔ型ハンドル１４でシャッター操作軸１２を図６（ａ）において右回りに回転させると、シャッター部材９が開スライドするようになる。
【００４７】
これにより、水路部材６内を通る流水と雪塊の内、流水の水面近くに浮かんだ雪塊は底部６ｂの分水用開口６ｃを通ることなくそのまま流し去られて、流水だけが分水用開口６ｃを通ってピット３のインバート４から分岐流雪溝２に分水されて流れ込むようになる。
【００４８】
この水路部材６の分水用開口６ｃは底部に形成されていることから、流雪溝１が急勾配で、流水の流速が非常に早くなったとしても、流水が底部６ｂの分水用開口６ｃから分岐流雪溝２に流れ込みやすくなる。
【００４９】
また、流雪溝１の流水の水位が下がったとしても、雪塊は流水の水面近くに浮かんだ状態であるから、底部６ｂの分水用開口６ｃが雪塊で塞がれて雪塊が渋滞するおそれがなくなって、分水用開口６ｃから流水だけが分岐流雪溝２に流れ込むようになる。これらのことから、分岐流雪溝２に常に適正な分水量を確保できるようになる。
【００５０】
さらに、シャッター部材９は、Ｔ型ハンドル１４の回転操作量で開閉スライド位置を微調整できるから、分水量を調整することができる。
【００５１】
上記分水用開口６ｃの下流端には、ビニールなどのゴミが引っ掛かることがある。このゴミは、同時にゴミ取り部材３３の引っ掛け部３３ａにも引っ掛かるから、図１３（ｃ）に示したような伸縮式のフック棒３５を用いて、ゴミ取り部材３３を上揺動させ、引っ掛け部３３ａを水面上に引き上げることにより、分水用開口６ｃに引っ掛かったゴミをゴミ取り部材３３の引っ掛け部３３ａで水面上に持ち上げて簡単に取り除くことができる。
【００５２】
一方、流雪溝１の一部である水路部材６内の水位が下がったときには、分水用開口６ｃが雪塊で塞がれて雪塊が渋滞するおそれがある。
【００５３】
このような場合には、フック状操作レバー２１を堰操作軸２０のフック部２０ａに引っ掛けて、係止部材７の上下方向の係止溝７ａのいずれか１つに係合させるように操作して、可動堰部材１６の湾曲板１６ｂを上動させると、可動堰部材１６の堰高を調整することができる。
【００５４】
これにより、水路部材６内の水位が上がることから、分水用開口６ｃが雪塊で塞がれて雪塊が渋滞するおそれがなくなる。
【００５５】
また、ピット３のインバート４に砂が堆積した場合には、可動堰部材１６の下流端の後平板１６ｄをガイド６ｈの間から上流方向に抜き取ると、水路部材６の排砂用開口６ｆが開放するので、インバート４に堆積した砂を分水の水流によって排砂用開口６ｆから流雪溝１に排出することができる。この砂の排出は定期的に行うことが好ましい。
【００５６】
さらに、ピット３のインバート４は、上下流方向に湾曲されているから、水利特性が向上するとともに、堆積した砂の排出がスムーズになる。
【００５７】
さらにまた、水路部材６の下流側の流雪溝１で雪塊が渋滞しているような緊急時には、Ｔ型ハンドル１４でゲート操作軸２４を図１において左回りに回転させると、ゲート２５が開き旋回（若しくはスライド）するようになる。
【００５８】
これにより、水路部材６の分水用開口６ｃをバイパスして、上流側の流雪溝１から流水とともに雪塊を直接に分岐流雪溝２に流し去ることができる。
【００５９】
【発明の効果】
以上の説明からも明らかなように、本発明は、分岐部分のピット内では、流雪溝を繋ぐように架橋された水路部材（流雪溝の一部）で流水とともに雪塊が流し去られるとともに、水路部材の底部の分水用開口から流水だけがピット底部のインバートから分岐流雪溝に分水されて流れ込むようになる。
【００６０】
この水路部材の分水用開口は底部に形成されていることから、流雪溝が急勾配で、流水の流速が非常に早くなったとしても、流水が底部の分水用開口から分岐流雪溝に流れ込みやすくなる。また、流雪溝の流水の水位が下がったとしても、雪塊は流水の水面近くに浮かんだ状態であるから、底部の分水用開口が雪塊で塞がれて雪塊が渋滞するおそれがなくなって、分水用開口から流水だけが分岐流雪溝に流れ込むようになる。これらのことから、分岐流雪溝に常に適正な分水量を確保できるようになる。
【００６１】
また、水路部材の底部に、分水用開口を開閉可能なシャッター部材を設けると（請求項２）、分水量を調整することができる。
【００６２】
さらに、水路部材の底部に、分水用開口の下流側に位置して上下動可能な可動堰部材を設けると（請求項３）、流雪溝の一部である水路部材内の水位が下がったときに、可動堰部材を堰高にして水位を上げることにより、分水用開口が雪塊で塞がれて雪塊が渋滞するおそれがなくなる。
【００６３】
さらにまた、可動堰部材に対応する水路部材の底部に、排砂用開口を形成し、この可動堰部材は、排砂用開口を開放できるように下流側が取り外し可能であると（請求項４）、可動堰部材の下流側を取り外して排砂用開口を開放することにより、ピットのインバートに堆積した砂を分水の水流によって排砂用開口から流雪溝に排出できるようになる。
【００６４】
また、ピットのインバートを上下流方向に湾曲させると（請求項５）、水利特性が向上するとともに、堆積した砂をスムーズに排出できるようになる。
【００６５】
さらに、水路部材の側部に、水路部材内の流水を分岐流雪溝に分水する緊急分水用開口を形成するとともに、この緊急分水用開口を開閉可能なゲートを設けると（請求項６）、水路部材の下流側の流雪溝で雪塊が渋滞しているような緊急時に、水路部材の分水用開口をバイパスして、上流側の流雪溝から流水とともに雪塊を直接に分岐流雪溝に流し去ることができる。
【００６６】
さらにまた、水路部材内に、分水用開口に引っ掛かったゴミを引っかけて上方に持ち上げ可能なゴミ取り部材を設けると（請求項７）、分水用開口に引っ掛かったゴミは、ゴミ取り部材で水面上に持ち上げて簡単に取り除くことができる。
【図面の簡単な説明】
【図１】旋回式ゲートを備えた流雪溝の分岐設備の平面図である。
【図２】図１の側面図である。
【図３】図２のＡ−Ａ線断面図である。
【図４】水路部材であり、（ａ）は平面図、（ｂ）は側面図である。
【図５】（ａ）は図４（ｂ）のＢ−Ｂ線断面図、（ｂ）は係止部材の正面図である。
【図６】シャッター部材とスライド機構であり、（ａ）は平面図、（ｂ）は側面図である。
【図７】（ａ）は図１のＣ−Ｃ線断面図、（ｂ）はシャッター部材の平面図である。
【図８】可動堰部材であり、（ａ）は要部破断平面図、（ｂ）は側面図である。
【図９】可動堰部材であり、（ａ）は要部破断正面図、（ｂ）は図８（ｂ）の要部拡大図である。
【図１０】ゴミ取り部材であり、（ａ）は正面図、（ｂ）は側面図である。
【図１１】スライド式ゲートを備えた流雪溝の分岐設備の平面図である。
【図１２】図１１の側面図である。
【図１３】（ａ）はＴ型ハンドルの正面図、（ｂ）は角穴の拡大図、（ｃ）はフック棒の正面図である。
【符号の説明】
１流雪溝
１ａ底部
２分流用流雪溝
３ピット
４インバート
６水路部材
６ｂ底部
６ｃ分水用開口
６ｆ排砂用開口
６ｊ緊急分水用開口
９シャッター部材
１６可動堰部材
２５ゲート[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a branch facility for a snow flow groove.
[0002]
[Prior art]
In heavy snowfall areas, snow blocks piled up on roads and the like are thrown into a snow flow groove provided on the side of the road, etc., and are washed away along with the flowing water to the downstream side.
[0003]
Since such a snow flute is routed around the town in the form of a mesh along the road, a branch snow flute that branches in a Y-shape or T-shape from the snow flute arrives. Is provided.
[0004]
By the way, in the snow flow groove, the snow mass is washed away along with the flowing water, and only the flowing water is flowed into the branch flow snow groove, thereby introducing the snow mass into the branch flow snow groove. However, the snow mass is washed away with the running water.
[0005]
For this reason, the present applicant has proposed to provide a branching facility in which only flowing water is allowed to flow in the branching snow groove at the branching part between the snowfall groove and the branching snow groove (Japanese Patent Application No. 2001-112575). Issue).
[0006]
The branch facility is a gate that is relatively movable between a position where the snow flow groove is closed and a position where the snow flow groove is closed, and the lower gate opening can be opened and closed with a shutter.
[0007]
When the branching snow groove is closed at the gate and the lower opening is opened with the shutter, the snow mass is in a state of floating near the surface of the flowing water, so that only the flowing water flows into the branching snow groove from the lower opening.
[0008]
[Problems to be solved by the invention]
However, when the snow flow groove has a steep slope, the flow rate of the flowing water becomes very fast, and there is a problem that the flowing water is difficult to flow into the branch flow snow groove from the lower opening of the gate.
[0009]
In addition, when the water level in the snow channel is lowered, there is a problem that the lower opening of the gate is blocked with a snow block and the snow block is congested, making it difficult for the water to flow into the branch flow channel. It was.
[0010]
The present invention has been made to solve the above-mentioned problem, and it is easy to flow water into the branch snow flute so that an appropriate amount of water can always be secured in the branch snow groove. It is a problem to provide.
[0011]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention is a branch facility provided at a branch portion of a snow flow groove for flowing away a snow mass together with running water, and a branch flow snow groove branched from the snow flow groove, pits are formed in the branching portion, the bottom of the pit, is formed inverted with recessed to be lower than the bottom of the Nagareyukimizo, together with the inverting and the branched flow Yukimizo is communicated, the in a pit, waterway member formed in a substantially U-shaped connecting the upstream side and the downstream side of the Nagareyukimizo is bridged, the bottom of the waterway member, branch flow flowing water in the waterway member from said inverted Yukimizo The present invention provides a diverging facility for a snowdrift groove, characterized in that an opening for diversion is formed.
[0012]
According to the present invention, in the pit of the branch portion, the snow mass is washed away together with the flowing water by the water channel member (a part of the snow flow groove) bridged so as to connect the snow flow groove, and the bottom portion of the water channel member is separated. From the water opening, only running water is diverted from the invert at the bottom of the pit into the diverging snow groove.
[0013]
Since the diversion opening of this water channel member is formed at the bottom, even if the snow flow groove is steep and the flow velocity of the flowing water becomes very fast, the flowing water is diverging from the diversion opening at the bottom. It becomes easy to flow into the groove. In addition, even if the water level in the drifting snow channel drops, the snow mass is floating near the surface of the running water, so the bottom diversion opening may be blocked by the snow mass and the snow mass may be congested. As a result, only running water flows from the diversion opening into the diverging snow groove. From these things, it becomes possible to always secure an appropriate amount of water distribution in the diverging snow groove.
[0014]
If the shutter member which can open and close the said water distribution opening is provided in the bottom part of the said water channel member like Claim 2, the amount of water distribution can be adjusted.
[0015]
When a movable weir member is provided at the bottom of the water channel member, which is located downstream of the water diversion opening and is movable up and down as in claim 3, the water channel member that is a part of the snow drift groove When the water level inside falls, by raising the water level by setting the movable weir member to the weir height, there is no possibility that the water diversion opening is blocked by the snow mass and the snow mass is congested.
[0016]
As in claim 4, a sand discharge opening is formed at the bottom of the water channel member corresponding to the movable dam member, and the movable dam member is removable on the downstream side so that the sand discharge opening can be opened. By removing the downstream side of the movable weir member and opening the opening for sand removal, the sand accumulated in the invert of the pit can be discharged from the opening for sand discharge to the snow drift groove by the water flow.
[0017]
As described in claim 5, when the invert of the pit is curved in the upstream / downstream direction, the water use characteristics are improved and the accumulated sand can be discharged smoothly.
[0018]
As in claim 6, an emergency diversion opening for diverting the running water in the water channel member to the branch snow groove is formed at the side of the water channel member, and the emergency diversion opening can be opened and closed. If an emergency gate is provided, it will bypass the water diversion opening of the waterway member in the event of an emergency where snow blocks are congested in the snowflow groove on the downstream side of the waterway member. Along with running water, snow blocks can be washed away directly into the branching snow trench.
[0019]
As in claim 7, if a dust collecting member is provided in the water channel member that can be lifted upward by hooking the dust caught in the diversion opening, the dust caught in the diversion opening is It can be easily removed by lifting it onto the water surface with a take-up member.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0021]
FIG. 1 is a plan view of a branching facility for flowing snow grooves, FIG. 2 is a side view, and FIG. 3 is a cross-sectional view taken along line AA in FIG.
[0022]
A pit 3 having a bottomed square shape is formed at a branching portion between a flowing snow groove 1 for flowing away a snow mass together with flowing water and a branched flowing snow groove 2 branched from the flowing snow groove 1. A concrete lid is usually dropped into the snowfall groove 1 and the branch snowfall groove 2, and a lattice-like grating is dropped into the pit 3 to be closed.
[0023]
An invert 4 is formed at the bottom of the pit 3 so as to be lower than the bottom 1a of the snow flow groove 1. The invert 4 is curved in the upstream and downstream directions (see FIG. 2). The bottom portion 4a of the invert 4 is formed so as to substantially coincide with the bottom portion 2a of the branch flow snow groove 2 so that the invert 4 and the branch flow snow groove 2 communicate with each other without any step (see FIG. 3). ). Further, the bottom 4a of the invert 4 on the side opposite to the branched snow groove 2 is formed on the inclined surface 4b.
[0024]
In the pit 3, as shown in FIGS. 4 and 5, a water channel member 6 that bridges the upstream and downstream snow flow grooves 1 is bridged. The water channel member 6 is formed in a substantially U shape by, for example, a stainless steel plate, and the upstream end and the downstream end are fitted in the upstream opening 3a and the downstream opening 3b of the pit 3. The flange portions 6a are fixed respectively.
[0025]
On the upstream side of the bottom 6 b of the water channel member 6, slit-shaped water diversion openings 6 c extending in the upstream and downstream directions at a constant pitch in the width direction are formed. In this example, six water diversion openings 6c are formed in the width direction. Spacers 6d are fixed to both upstream and downstream sides of the water diversion opening 6c on the lower surface of the bottom 6b, and stopper grooves 6e are formed in the upstream spacer 6d (see FIG. 6).
[0026]
A sand discharge opening 6f is formed on the downstream side of the bottom portion 6b of the water channel member 6, and both sides 6g of the water channel member 6 located on the downstream side of the sand discharge opening 6f have an upper surface of the bottom portion 6b. A guide 6h protruding inward with a predetermined gap is attached. Further, an elongate hole 6i in the vertical direction is formed in the lower part of both side portions 6g of the water channel member 6 located substantially in the middle in the upstream and downstream direction of the sand discharge opening 6f, and is located above the elongate hole 6i. A locking member 7 having locking grooves 7a formed at a constant pitch (for example, 25 mm) in the vertical direction is attached to the upper part of both side portions 6g of the water channel member 6.
[0027]
Between the spacer 6d of the bottom 6b on the upstream side of the water channel member 6, a shutter member 9 having openings 9a formed at the same pitch as the diversion openings 6c is disposed. This shutter member 9 is shown in FIGS. As also shown, the guide plate 10 fixed to the spacer 6d is supported so as to be slidable in the width direction between the bottom 6b.
[0028]
When the opening 9a of the shutter member 9 coincides with the diversion opening 6c, the water flow in the water channel member 6 is diverted from the openings 6c and 9a toward the invert 4, and the opening 9a of the shutter member 9 is also opened. At the time of a closed slide that does not coincide with the water diversion opening 6c, the water flow in the water channel member 6 is not diverted but flows directly into the snow flow groove 1 on the downstream side.
[0029]
A stopper portion 9b that enters the stopper groove 6e of the spacer 6d is formed on the side of the shutter member 9, and the shutter member 9 is stopped at the open / closed position by the stopper portion 9b.
[0030]
A pin 9c is attached to one end of the shutter member 9 in the width direction, and the upper and lower brackets 11 are used as shutters on the outer surface of one side portion 6g of the water channel member 6 (opposite to the branching snow groove 2). The operation shaft 12 is supported, and the pin 9 c is engaged with the shutter member 9 in the long hole 13 a of the lever 13 attached to the lower end portion of the shutter operation shaft 12. Further, at the upper end portion of the shutter operation shaft 12, a corner portion 12a into which the square hole 14a of the T-type handle 14 as shown in FIGS. 13A and 13B can be inserted from above is formed.
[0031]
Then, when the square hole 14a of the T-type handle 14 is inserted into the corner portion 12a and the T-type handle 14 is rotated in one direction, the shutter operation shaft 12 is rotated in the same direction (counterclockwise in FIG. 6B). Then, the shutter member 9 closes and slides through the long hole 13a of the lever 13 and the pin 9c, and conversely, when the T-type handle 14 is rotated in the other direction, the shutter operation shaft 12 rotates in the same direction (FIG. 6B). The shutter member 9 is opened and slid through the elongated hole 13a of the lever 13 and the pin 9c. The opening / closing slide position of the shutter member 9 can be finely adjusted by the rotation operation amount of the T-type handle 14.
[0032]
A movable weir member 16 that closes the sand discharge opening 6f is disposed above the sand discharge opening 6f of the water channel member 6. As shown in FIGS. 8 and 9, the movable dam member 16 is formed to have an outer width substantially the same as the inner width of both side portions 6 g of the water channel member 6, and a curved plate 16 b that is curved in a mountain shape. A front flat plate 16a connected to the upstream side of the curved plate 16b by a hinge portion 17b, an intermediate flat plate 16c connected to the downstream side of the curved plate 16b by a hinge portion 17c, and a hinge portion 17d connected to the intermediate flat plate 16c. And a flat plate 16d.
[0033]
The front flat plate 16a has a front end fixed to the bottom 6b of the water channel member 6 by a hinge portion 17a, and the rear flat plate 16d is formed on both sides 6g of the water channel member 6 located downstream of the sand discharge opening 6f. It is inserted from the upstream side between the upper surface of the bottom 6b and the guide 6h.
[0034]
Then, from the state in which the curved plate 16b is pressed against the bottom 6b of the water channel member 6 with water flow pressure (the minimum weir height: see the solid line in FIG. 2 and the two-dot chain line a in FIG. 8B), the weir operation shaft described later When the curved plate 16b is gradually moved up by the operation 20, the flat plates 16a, 16c, and 16d follow this, and the rear flat plate 16d is guided by the guide 6h while being bent by the hinge portions 17a to 17c. (The maximum weir height: see solid line b in FIG. 8B and FIG. 9B).
[0035]
The rear flat plate 16d at the downstream end of the movable weir member 16 can be extracted in the upstream direction from between the upper surface of the bottom 6b and the guide 6h. By this extraction, the sand discharge opening 6f of the water channel member 6 is obtained. Can be released.
[0036]
A curved block 18 extending in the width direction is inserted into the lower surface of the curved plate 16b, and pins 18a at both ends of the curved block 18 are engaged with elongated holes 6i on both side portions 6g of the water channel member 6. It protrudes outward. A seal member 19 for preventing water leakage from the long hole 6i is fixed to each pin 18a protruding outward, and a lower end portion of the weir operation shaft 20 is attached to each seal member 19. . Further, as shown in FIGS. 8B and 9A, the upper end portion of the weir operation shaft 20 is engaged with any one of the vertical locking grooves 7a of the locking member 7. A possible L-shaped hook portion 20a is formed.
[0037]
Then, a hook-shaped operation lever 21 as shown by a two-dot chain line in FIG. 8B is hooked on the hook portion 20a of the weir operation shaft 20, and any one of the locking grooves 7a in the vertical direction of the locking member 7 is set. By operating to engage the two, the weir height of the movable weir member 16 can be adjusted stepwise.
[0038]
Returning to FIGS. 1 to 3, an emergency diversion opening 6 j is formed on the side 6 g of the other side of the water channel member 6 where the diversion opening 6 c is located (the same side as the branching snow groove 2). The emergency diversion opening 6j swings into the closing position (see the solid line c) for closing the emergency diversion opening 6j around the gate operation shaft 24 on the downstream side and urgently into the water channel member 6. A swing type gate 25 that can be opened and closed is provided at an opening position (see a two-dot chain line d) for opening the water diversion opening 6j.
[0039]
At the upper end portion of the gate operation shaft 24, a corner portion 24a into which the square hole 14a of the T-type handle 14 can be inserted from above as shown in FIGS. 13 (a) and 13 (b) is formed. When the square hole 14a is inserted into the corner 24a and the T-handle 14 is rotated in one direction, the gate operating shaft 24 is rotated in the same direction (counterclockwise in FIG. 1), and the gate 25 opens and turns. On the other hand, when the T-type handle 14 is rotated in the other direction, the gate operation shaft 24 is rotated in the same direction (clockwise in FIG. 1), and the gate 25 is closed and turned. The gate 25 is naturally held at a closed or open position by water flow pressure.
[0040]
As shown in FIG. 11 and FIG. 12, instead of the swivel gate 25, the emergency diversion opening 6j is attached to the other side 6g of the water channel member 6 (the same side as the branching snow groove 2). The sliding gate that can be opened and closed vertically by the guide rail 26 to a closed position for closing the emergency diversion opening 6j and an open position (see a two-dot chain line d) that slides upward to open the emergency diversion opening 6j. 25 may be provided.
[0041]
A lower end portion of the gate operation screw shaft 27 is fixed to the outer surface side of the slide type gate 25, and an intermediate portion of the gate operation screw shaft 27 is the other side of the water channel member 6 (the same side as the branch flow snow groove 2). A corner portion in which a square hole 14a of a T-shaped handle 14 as shown in FIGS. 13 (a) and 13 (b) can be inserted from above into an upper end portion by being screwed into a nut member 28 attached to the side portion 6g. 27a is formed. When the square hole 14a of the T-type handle 14 is inserted into the corner 27a and the T-type handle 14 is rotated in one direction, the gate operation screw shaft 27 rotates in the same direction (counterclockwise in FIG. 11). And the gate 25 opens and slides (moves upward). Conversely, when the T-handle 14 is rotated in the other direction, the gate operation screw shaft 27 is rotated in the same direction (clockwise in FIG. 11). Gate 25 is closed It comes to ride (downward).
[0042]
As shown in FIG. 10, a substantially U-shaped dust removing member 33 is provided, and both upper ends of the dust removing member 33 are attached to both side portions 6 g in the water channel member 6 so as to be swingable up and down by pins 34. At the same time, the front end portion of the lower hook 33a, which is set to pass the upper surface of the bottom 6b of the water channel member 6 at the lower swing position, is formed on an inclined surface.
[0043]
In the dust swinging member 33 at the downward swing position of the solid line e in FIG. 10B, the hook 33a faces the downstream end of the water distribution opening 6c of the water channel member 6, and the downstream end of the water distribution opening 6c. The garbage caught on the hook is also hooked on the hook 33a at the same time.
[0044]
Next, the operation of the branching facility for the flowing snow groove 1 configured as described above will be described. Under normal conditions, the diversion opening 6 c of the water channel member 6 is closed by the shutter member 9, the emergency diversion opening 6 j is closed by the gate 25, the movable dam member 16 is adjusted to the minimum dam height, and the dust removing member 33. Is swung downward to a lower swing position.
[0045]
Then, the snow mass that has flowed along with running water from the upstream snow flow groove 1 passes through the water channel member 6 that is a part of the snow flow groove 1 and is washed away to the downstream snow flow groove 1.
[0046]
In this state, when it is necessary to divide only the flowing water into the diverging snow groove 2, if the shutter operating shaft 12 is rotated clockwise in FIG. It comes to slide.
[0047]
As a result, of the running water and snow mass passing through the water channel member 6, the snow mass floating near the surface of the running water is washed away without passing through the diversion opening 6c of the bottom 6b, and only the running water is used for diversion. The water is diverted from the invert 4 of the pit 3 to the branched snow groove 2 through the opening 6c.
[0048]
Since the diversion opening 6c of the water channel member 6 is formed at the bottom, even if the snow flow groove 1 has a steep slope and the flow velocity of the flowing water becomes very high, the flowing water has an opening for diversion of the bottom 6b. It becomes easy to flow into the branch flow snow groove 2 from 6c.
[0049]
Even if the water level of the flowing snow groove 1 is lowered, the snow mass is in a state of floating near the surface of the flowing water, so that the diversion opening 6c in the bottom portion 6b is blocked by the snow mass and the snow mass is formed. There is no possibility of traffic jams, and only running water flows into the diverging snow groove 2 from the diversion opening 6c. From these things, it becomes possible to always ensure an appropriate amount of water distribution in the branch flow snow groove 2.
[0050]
Furthermore, since the shutter member 9 can finely adjust the open / close slide position by the rotation operation amount of the T-type handle 14, the amount of water can be adjusted.
[0051]
Garbage such as vinyl may be caught on the downstream end of the diversion opening 6c. Since this dust is also caught on the hooking portion 33a of the dust collecting member 33 at the same time, the dust collecting member 33 is swung upward by using an extendable hook bar 35 as shown in FIG. By lifting the 33a on the water surface, the dust caught in the water diversion opening 6c can be easily removed by lifting it up on the water surface by the hook portion 33a of the dust removing member 33.
[0052]
On the other hand, when the water level in the water channel member 6, which is a part of the snow flow groove 1, falls, the diversion opening 6 c may be blocked by the snow mass, and the snow mass may be congested.
[0053]
In such a case, the hook-shaped operation lever 21 is hooked on the hook portion 20a of the weir operation shaft 20 and is operated so as to be engaged with any one of the vertical locking grooves 7a of the locking member 7. When the curved plate 16b of the movable dam member 16 is moved upward, the dam height of the movable dam member 16 can be adjusted.
[0054]
Thereby, since the water level in the water channel member 6 rises, there is no possibility that the water diverting opening 6c is blocked by the snow mass and the snow mass becomes congested.
[0055]
When sand accumulates on the invert 4 of the pit 3, if the rear flat plate 16 d of the downstream end of the movable weir member 16 is extracted upstream from between the guides 6 h, the sand discharge opening 6 f of the water channel member 6 is opened. Therefore, the sand deposited on the invert 4 can be discharged to the snow drift groove 1 from the sand discharge opening 6f by the diversion water flow. The sand is preferably discharged periodically.
[0056]
Furthermore, since the invert 4 of the pit 3 is curved in the upstream / downstream direction, the water use characteristics are improved and the accumulated sand is smoothly discharged.
[0057]
Furthermore, in an emergency where snow blocks are congested in the flowing snow groove 1 on the downstream side of the water channel member 6, when the gate operating shaft 24 is rotated counterclockwise in FIG. It opens and turns (or slides).
[0058]
As a result, it is possible to bypass the diversion opening 6 c of the water channel member 6, and allow the snow mass to flow directly from the upstream snow flow groove 1 together with running water to the branch snow flow groove 2.
[0059]
【The invention's effect】
As is clear from the above description, in the present invention, in the pit of the branch portion, the snow mass is washed away together with the running water by the water channel member (part of the running snow groove) bridged so as to connect the running snow groove. At the same time, only flowing water flows from the inversion at the bottom of the pit into the branched snow groove from the diversion opening at the bottom of the water channel member.
[0060]
Since the diversion opening of this water channel member is formed at the bottom, even if the snow flow groove is steep and the flow velocity of the flowing water becomes very fast, the flowing water is diverging from the diversion opening at the bottom. It becomes easy to flow into the groove. In addition, even if the water level in the drifting snow channel drops, the snow mass is floating near the surface of the running water, so the bottom diversion opening may be blocked by the snow mass and the snow mass may be congested. As a result, only running water flows from the diversion opening into the diverging snow groove. From these things, it becomes possible to always secure an appropriate amount of water distribution in the diverging snow groove.
[0061]
Further, when a shutter member capable of opening and closing the water distribution opening is provided at the bottom of the water channel member (Claim 2), the water distribution amount can be adjusted.
[0062]
Furthermore, if a movable weir member that can move up and down is provided at the bottom of the water channel member and is located downstream of the diversion opening (Claim 3), the water level in the water channel member that is a part of the snow flow groove is lowered. In such a case, by raising the water level by setting the movable weir member to the height of the weir, there is no possibility that the diversion opening is blocked by the snow mass and the snow mass is congested.
[0063]
Furthermore, a sand discharge opening is formed at the bottom of the water channel member corresponding to the movable dam member, and the movable dam member is removable on the downstream side so that the sand discharge opening can be opened (Claim 4). By removing the downstream side of the movable weir member and opening the opening for sand removal, the sand accumulated in the invert of the pit can be discharged from the opening for sand discharge to the snow drift groove by the water flow.
[0064]
Further, when the invert of the pit is curved in the upstream / downstream direction (Claim 5), the water use characteristics are improved and the accumulated sand can be discharged smoothly.
[0065]
Further, an emergency diversion opening that divides the running water in the water channel member into a diverging snow groove is formed on a side portion of the water channel member, and a gate capable of opening and closing the emergency diversion opening is provided (claim). 6) In case of an emergency where snow blocks are congested in the flow channel on the downstream side of the water channel member, bypass the diversion opening on the water channel member and directly pass the snow block from the flow channel on the upstream side along with running water. It can be washed away in a diverging snow groove.
[0066]
Furthermore, if a dust removing member is provided in the water channel member that can be lifted upward by catching the dust caught in the water diversion opening (claim 7), the dust caught in the water diversion opening is removed by the dust removing member. Can be easily removed by lifting on the surface of the water.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a plan view of a snowfall groove branching facility equipped with a swivel gate.
FIG. 2 is a side view of FIG.
FIG. 3 is a cross-sectional view taken along line AA in FIG.
4A and 4B are water channel members, where FIG. 4A is a plan view and FIG. 4B is a side view.
5A is a cross-sectional view taken along line BB in FIG. 4B, and FIG. 5B is a front view of the locking member.
6A and 6B are a shutter member and a slide mechanism, where FIG. 6A is a plan view and FIG. 6B is a side view.
7A is a cross-sectional view taken along the line CC of FIG. 1, and FIG. 7B is a plan view of the shutter member.
8A and 8B are movable weir members, where FIG. 8A is a plan view of a principal part and FIG. 8B is a side view.
9A and 9B are movable weir members, in which FIG. 9A is a cutaway front view of the main part, and FIG. 9B is an enlarged view of the main part of FIG.
FIG. 10 is a dust removal member, (a) is a front view and (b) is a side view.
FIG. 11 is a plan view of a snowfall diverging facility equipped with a sliding gate.
12 is a side view of FIG. 11. FIG.
13A is a front view of a T-type handle, FIG. 13B is an enlarged view of a square hole, and FIG. 13C is a front view of a hook bar.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Snow flow groove 1a Bottom part 2 Snow flow groove for diversion 3 Pit 4 Invert 6 Water channel member 6b Bottom part 6c Water diversion opening 6f Sand discharge opening 6j Emergency diversion opening 9 Shutter member 16 Movable weir member 25 Gate

Claims

A branching facility provided at a branching portion of a snowfall groove for removing snow blocks together with running water and a branching snowfall groove branched from the snowfall groove,
Pits are formed in the branching portion, the bottom of the pit, is formed inverted with recessed to be lower than the bottom of the Nagareyukimizo, together with the inverting and the branched flow Yukimizo is communicated, the in a pit, waterway member formed in a substantially U-shaped connecting the upstream side and the downstream side of the Nagareyukimizo is bridged, the bottom of the waterway member, branch flow flowing water in the waterway member from said inverted Yukimizo A diverging facility for drifting snow grooves, characterized in that an opening for diverting water is formed.

The branching facility for snow drift grooves according to claim 1, wherein a shutter member capable of opening and closing the diversion opening is provided at the bottom of the water channel member.

The branching facility for a snow drift groove according to claim 1 or 2, wherein a movable weir member is provided at the bottom of the water channel member and is located downstream of the diversion opening and is movable up and down.

4. The snow drift groove according to claim 3, wherein a sand discharge opening is formed at a bottom of the water channel member corresponding to the movable weir member, and the movable weir member is removable on the downstream side so that the sand discharge opening can be opened. Branching equipment.

The inversion of the said pit is a branching facility of the snow drift groove as described in any one of Claims 1-4 curved in the up-down direction.

On the side of the water channel member, an emergency water diverting opening for diverting running water in the water channel member to the branch snow flow groove is formed, and a gate capable of opening and closing the emergency water diverting opening is provided. The branching facility for snow drift grooves according to any one of claims 1 to 5.

The facility for branching snow drift grooves according to any one of claims 1 to 6, wherein a dust removing member is provided in the water channel member, which is capable of hooking up the dust caught in the diversion opening and lifting it upward.