JP2004353407A

JP2004353407A - Water level regulation sluice

Info

Publication number: JP2004353407A
Application number: JP2003155152A
Authority: JP
Inventors: Toshiki Tanaka; 敏喜田中; Takesuke Onitsuka; 武祐鬼束; Makoto Yoshinaga; 誠吉永
Original assignee: Sumikin Recotech Co Ltd
Current assignee: Nippon Steel Slag Products Co Ltd
Priority date: 2003-05-30
Filing date: 2003-05-30
Publication date: 2004-12-16

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water level regulation sluice capable of easily and accurately regulating the flow of water flowing downstream from the upstream side owing to the arrangement of a second door body at a cutout opening while having excellent productivity and operability needing to use only one lifting mechanism part and having excellent safety with water flowing smoothly because an irrigation canal can be released. <P>SOLUTION: This water level regulation sluice 1 comprises a frame body 2 erected in the irrigation canal; lifting groove parts opposedly formed on both side parts of the frame body 2; a first door body 6 loosely fitted to the lifting groove part and liftably disposed inside the frame body 2; the cutout opening 7 formed in recessed shape in the first door body; sliding groove forming parts 8a, 8b forming sliding groove parts in a face, upstream of the irrigation canal, of the first door body; the second door body 9 loosely fitted to the sliding groove parts and disposed to open/close the cutout opening 7; engaging parts 10a, 10b fixed to the upper end of the first door body 6; and the lifting mechanism part 18 for lifting the second door body 9. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、農業用水路や工業用水路等の用水路に配設され前記用水路の上流側の水位の調整、前記用水路の堰き止め及び開放等、或いは灌漑用貯水池や養殖用池等の出口側に設置され池の水位調整等に用いられる水位調整水門に関するものである。
【０００２】
【従来の技術】
従来、農業用水路等の用水路の上流側に連通する暗渠等を介して接続された水田等の灌漑や灌漑用貯水池や養殖用池等の出口側に設置され池の水位調整等を行うために水位調整水門が用いられている。このような水位調整水門としては、用水路の上流側から下流側へ向かって高さが順次低くなるように複数の仕切り板を所定の間隔で立設した段差式のものや、用水路に配設される枠体と、該枠体内に昇降自在に配設された親扉と、該親扉の上端部に切り欠き形成された開口部に上方に摺動自在で開閉自在に配設された子扉と、前記親扉を枠体内において手動又はモータ等により自動で昇降させる昇降機構部を有するもの等がある。
しかしながら、上述したような段差式の水位調整水門では、所望の水位となるように仕切り板を一々取り外したり取り付けたりする必要があり作業性に欠け、特に老人や女性等には重労働であるという問題があった。また、親扉の上端部に上方に摺動自在な子扉を有するものでは、親扉の昇降により用水路を開閉し通水又は堰き止めることができると共に、親扉を降ろした状態で子扉を開閉することにより、上流側の水位をある程度細かく調整することができるが、子扉は親扉の開口部の両側部の内壁に設けられた摺動溝に上方へ摺動自在に嵌合されているだけなので、該開口部の最下端部のレベルは変化せず、微調整を行うことができないと共に、作業者は子扉を開いた後、所望の水位になるまで監視して所望の水位に達すると子扉を閉めるといった操作を行う必要があり、作業に時間を取られ作業性に欠けるという問題があった。
このような問題を解決するために、特許文献１には「水路に昇降自在に配設された昇降扉と、この昇降扉上に起伏自在に設置された回転扉と、前記昇降扉を昇降させる昇降手段と、前記回転扉を引上げる引上げ手段とを備え、前記引上げ手段が、前記回転扉に結合された紐状体と、この回転扉の上方に設置されてこの紐状体を巻き上げる巻き上げ手段とから成り、前記昇降扉の上昇にともなうこの紐状体の緩みを回避するべくこの紐状体にテンションを付与するテンション付与手段を設けたことを特徴とする２段ゲート装置」が開示されている。
また、特許文献２には、「水路の放流端に取り付けられた枠状の戸当りと、この戸当りの前側に前後方向に隣接して配置された複数段の扉体と、これら扉体それぞれの幅方向両端部の前面に対応して前記戸当りに取り付けられ各扉体の昇降を案内する案内板とを備え、最前段の扉体を吊持して昇降させる開閉装置が設けられ、前記開閉装置による吊り上げで前記最前段の扉体が上限位置に到達する上昇途中で前段の扉体に下面を係合させて、後段の扉体を追従して上昇させる係止部が複数段の扉体における最前段の扉体以外の扉体に設けられた多段式可動堰」が開示されている。
【０００３】
【特許文献１】
特開平６−４１９３７号公報
【特許文献２】
特開２００２−２２７１７０号公報
【０００４】
【発明が解決しようとする課題】
しかしながら上記従来の技術では、以下のような課題を有していた。
（１）特許文献１の「２段ゲート装置」では、昇降扉と回転扉を各々別々の駆動装置により昇降又は起伏させているので、駆動源が２つ必要になり装置が複雑化し生産性及び操作性に欠けるという課題を有していた。
（２）特許文献２の「多段式可動堰」では、枠状の戸当りに複数段の扉体を前後方向に隣接して配置すると共に戸当りに各扉体の昇降を案内する案内板を設けているので、戸当りに少なくとも２以上の案内板を設ける必要があり戸当りの前後方向に装置が大型しコンパクト性に欠けるという課題を有していた。
（３）特許文献２の「多段式可動堰」では、前段及び後段の扉体を下限位置に配置した全開時において扉体により用水路の底部側が堰き止められているため、増水時等に水の流れが滞り床下浸水等の水害を引き起こす可能性があり安全性に欠けるという課題を有していた。
（４）特許文献２の「多段式可動堰」では、前後方向に隣接して配置された複数段の扉体の内、前段の扉体の上端部の高さを調整することにより上流側から下流側へ越流する水の流量を調整しているが、前段の扉体の上端部の幅が広いため前段の扉体を昇降させることによる流量の調整が難しく、特に少ない流量における調整が困難であり使用性に欠けるという課題を有していた。
【０００５】
本発明は上記従来の課題を解決するもので、第２の扉体の昇降させることにより連動して第１の扉体を昇降させることができるので、昇降のために１の昇降機構部を用いるだけでよく生産性及び操作性に優れると共に、用水路を全開して開放することができるので増水時においても水が滞りなく流れ安全性に優れ、第２の扉体を第１の扉体に設けた凹状の切り欠き開口部に配設しているので、上流側から下流側へ流れる水の流量を容易に且つ正確に調整することができる水位調整水門を提供することを目的とする。
【０００６】
【課題を解決するための手段】
上記従来の課題を解決するために本発明は以下の構成を有している。
本発明の請求項１に記載の水位調整水門は、農業用水路や工業用水路等の用水路に配設され前記用水路の流量の調整、前記用水路の上流側の水位の調整、前記用水路の堰き止め及び開放等を行う水位調整水門であって、前記用水路の両側壁に沿って立設された枠体と、前記枠体の両側部の内側に対向して各々形成された昇降溝部と、前記昇降溝部に両側端部が摺動自在に遊嵌し前記枠体の内部に昇降自在に配設された第１の扉体と、前記第１の扉体の上端に凹状に切り欠き形成された切り欠き開口部と、前記第１の扉体の前記用水路の上流側の面に上端部から下方へ前記切り欠き開口部の両側部に沿って各々連設され内側に開口した摺動溝部を形成する摺動溝形成部と、前記摺動溝部に両側端部が摺動自在に遊嵌し前記切り欠き開口部を開閉自在に配設された第２の扉体と、前記第１の扉体の上端部に固設され前記切り欠き開口部の上部の両縁部に水平方向に各々向き合って突設され前記第２の扉体の上端部が係合する係合部と、前記枠体の上部に配設され前記第２の扉体を昇降させる昇降機構部と、を備えた構成を有している。
この構成により、以下のような作用を有する。
（１）第１の扉体を最下部まで下降させた状態で昇降機構部により第２の扉体を下降させることにより、用水路の水位調整水門の上流側の水が下降した第２の扉体の上端部から越流し下流側へ流れ込むので、上流側の水位を第２の扉体の上端部の高さに調整することができる。用水路の水位調整水門の上流側は暗渠を介して水田に連通しているので、用水路の上流側の水位を調整することにより水田の水位を用水路と同じレベルに調整することができる。
（２）第１の扉体を最下部まで下降させた状態で昇降機構部により第２の扉体を上昇させると共に、第２の扉体の上端部に第１の扉体の上端部に固定され切り欠き開口部の上端部に水平方向に向き合って突設された係合部が係合して、第２の扉体と共に第１の扉体を上昇させることができ、用水路を大きく開放することができる。また、第２の扉体の昇降させることにより連動して第１の扉体を昇降させることができるので、昇降のために１の昇降機構部を用いるだけでよく生産性及び操作性に優れる。
（３）切り欠き開口部の大きさを適宜設定すると共に第２の扉体の上端部の高さを可変させることにより、用水路の上流側から下流側へ切り欠き開口部の第２の扉体の上端部から越流する用水の流量を調整することができる。特に第１の扉体の上端部に用水路の幅より幅の小さい切り欠き開口部が形成され、切り欠き開口部から上流側の水が下流側へ越流するため、少ない流量において流量を正確に且つ微調整することができる。
（４）摺動溝部を形成する摺動溝形成部が第１の扉体の用水路の上流側の面に沿って配設されているので、第２の扉体が摺動溝部に遊嵌され第１の扉体の用水路の上流側の面に配設され、上流側から下流側への水の流れ又は水圧により第２の扉体を第１の扉体に圧接させることができ、第２の扉体と第１の扉体との間隙を水密にすることができる。
【０００７】
ここで、枠体としては形鋼等の鋼材等により形成され、枠体の両側部が各々用水路の両側壁に沿って配設される矩形状のもの等が用いられる。枠体の底部は必ずしも設ける必要はなく、用水路を造設する際に鋼材等を用水路の側壁や底壁に埋め込んで立設し枠体の側部としてもよい。
第１及び第２の扉体としては、金属製等の板状体や鋼材等からなるフレームに金属製板状体を溶着したもの等が用いられる。また、用水路の水の水圧がかかるため補強のためのリブ等を設けてもよい。
第１の扉体の上端部に形成される切り欠き開口部としては、両側部に沿って直線状の摺動溝形成部が形成されるため矩形状等に形成されることが好ましい。切り欠き開口部が矩形状に形成された場合は、その幅を用水路の幅より小さく形成すれば、用水路の上流側から切り欠き開口部を介して下流側へ越流する水の流量を少量にすることができ、さらに第２の扉体を昇降させることで少ない流量において流量を正確に且つ微調整することができる。切り欠き開口部の形成位置は、第１の扉体の上端中央部でもよく上端側部でもよい。
昇降溝部には第１の扉体の両側端部が遊嵌されるため、第１の扉体と枠体の両側部との間隙を覆う又は埋めるためのゴム材等からなる水密部を設けることが好ましい。なお、昇降溝部と第１の扉体との摺接部分にゴム材や合成樹脂材等の水密部を設けると摩擦により第１の扉体が円滑に摺動し難いため、第１の扉体の両側部の水密部としては、第１の扉体の表面から枠体の側部に沿って湾曲して第１の扉体と摺動溝部との間隙を覆うように配設される帯状のゴム材等を用いることが好ましい。また、第１の扉体の下端部に沿って配設され枠体の底部に当接するゴム材や合成樹脂材等からなる水密部を設けることが好ましい。
摺動溝部を形成する摺動溝形成部としては、断面略Ｌ字、Ｕ字、コ字形状等の金属製等の長尺部材が用いられる。摺動溝形成部は第１の扉体に螺着や溶着により固定してもよく、或いは一体的に設けてもよい。また、摺動溝部と第２の扉体との摺接部分にゴム材等からなる水密部を設けてもよい。
【０００８】
昇降機構部としては、ハンドル部の回転により回転するピニオンと、ピニオンに噛み合うと共に第２の扉体の上端部に接続された長尺のラック又はピンラック等を有するもの、ハンドル部の回転により回転するナットと、ナットに挿通し螺合する螺螺子が形成されると共に第２の扉体の上端部に接続されたロッド状部材を有するもの、或いは第２の扉体の上端部に一端部が接続されたワイヤの他端部を巻き上げる巻き上げプーリを有するもの、可動する梃子又はレバーとそれと第２の扉体とを接続するリンク等を有するもの等が用いられる。また、昇降機構部は第２の扉体の昇降を手動で行うためのハンドル部、又は自動で行うためのモータ等の駆動部を有し、ハンドル部や駆動部の回転をピニオンや巻き上げプーリに伝達するためのウォームギア及びウォームホイール等を有する回転伝達部等を有してもよい。
なお、回転伝達部にウォームギア及びウォームホイールを設けることにより、又はピニオンや巻き上げプーリの回転を止めるためのストッパを設けることにより、或いはハンドル部を枠体に固定するために鎖等をハンドル部に巻き付けることにより、第１、第２の扉体を所定の位置で確実に停止させることができ、落下を防止することができる。また、枠体の側部と第１の扉体の各々に、第１の扉体が所定の高さに位置する際に連通する孔を穿設し、該孔にピン等を挿入して第１の扉体を所定の位置で固定して落下を防止することもできる。
扉体の昇降を行わない場合は、ハンドル部に枠体に固定するための鎖等を巻き付けて、さらに鎖に施錠しておくことにより、他人が勝手にハンドル部を操作して扉体の昇降を行うことを防ぐことができる。
【０００９】
本発明の請求項２に記載の発明は、請求項１に記載の水位調整水門であって、前記第１の扉体に形成された係止部と、前記第２の扉体に形成され前記係止部が脱着自在に係止される被係止部と、を備えた構成を有している。
この構成によって、請求項１の作用に加え、以下のような作用を有する。
（１）第１の扉体を最下部まで下降させた状態で昇降機構部により第２の扉体を上昇させると共に、第２の扉体の上端部に第１の扉体の上端部に固定された係合部を係合させ、第２の扉体と共に第１の扉体を上昇させる場合に、係止部を被係止部に係止することにより、第１の扉体は第２の扉体に強固に固定されるため、第１の扉体を上昇又は下降させる際に、第１の扉体と第２の扉体を一体的に上昇又は下降させることができ、例えば第１の扉体が昇降溝部につまったゴミ等により下降途中で引っ掛かって第２の扉体のみが下降することがなく確実に開閉動作を行うことができ、また、ゴミ等によるつまりがなくなって第１の扉体が急に落下したりすることがないため安全性に優れる。
（２）第１の扉体を最下部まで下降させると、係止部が被係止部から外れるようにした場合は、第１の扉体を最下部まで下降させた状態、即ち用水路を閉止した状態で、第２の扉体のみを下降又は上昇させ切り欠き開口部を開閉することができる。
【００１０】
ここで、係止部としては第１の扉体の第２の扉体側に形成された凸状部又は凹状部、或いは爪部等が用いられ、被係止部としては第２の扉体の下端部や側部に形成され係止部が係止される又は嵌合する凹状部又は凸状部、或いは爪部等が用いられる。また、係止部としてピン、被係止部として該ピンが挿入される孔等を用いることもできる。
係止部と被係止部に脱着自在に係止するための脱着手段としては、一端部が第１の扉体に軸着されたレバー等の他端部に係止部を設け、該レバーを回転させて係止部を被係止部に脱着自在に係止するものや、係止部をレール等に摺動自在に配設し、被被係止部に対して進退自在に配設したもの等が用いられる。なお、このとき、係止部を被係止部に向かって付勢するコイルばね等の弾性部と、第１の扉体の下端部から下方へ突出した突出部と、突出部と被係止部とを連結するＬ字状のクランクや梃子、レバー等のリンク機構等と、を設けることもできる。これにより、第１の扉体が最下部まで下降すると突出部が枠体の底部に当接して第１の扉体の内部に納置され、これにリンク機構を介して連動して係止部が被係止部から外れる。また、第１の扉体を上昇させ第１の扉体が枠体の底部から離れると、突出部が第１の扉体の底部から突出すると共に、連動して弾性部により係止部が被係止部に向かって付勢され係止される。
【００１１】
本発明の請求項３に記載の発明は、請求項１又は２に記載の水位調整水門であって、前記摺動溝形成部の下端部側の前記第１の扉体の上流側の面に突設された下部ストッパ部を備えた構成を有している。
この構成により、請求項１又は２の作用に加え、以下のような作用を有する。
（１）摺動溝形成部の下端部側の第１の扉体の上流側の面に下部ストッパ部が突設されているので、第２の扉体が第１の扉体の用水路の上流側の面に沿って下降し切り欠き開口部を開放した状態で第２の扉体の下端部が下部ストッパ部に当接し、第２の扉体がそれ以上下方へ下降することを防ぐことができる。
【００１２】
本発明の請求項４に記載の発明は、請求項１乃至３の内いずれか１項に記載の水位調整水門であって、前記第２の扉体の前記第１の扉体側の面の下端部及び両端部に沿って配設された水密圧接部を備えた構成を有している。
この構成により、請求項１乃至３の内いずれか１項の作用に加え、以下のような作用を有する。
（１）第２の扉体が第１の扉体の用水路の上流側の面に配設されると共に、第２の扉体の第１の扉体側の下端部及び両端部に水密圧接部が配設されているので、上流側から下流側への用水の流れにより第２の扉体を第１の扉体に圧接させ、水密圧接部を第１の扉体に圧接させることができ、第２の扉体と第１の扉体との間隙を確実に水密にすることができる。
【００１３】
ここで、水密圧接部としては、ゴム材やプラスチック等の合成樹脂材等が用いられる。また、ゴム材として内部に長手方向に孔を形成した長尺のゴム材等を用いてもよい。これにより、ゴム材の柔軟性を高め、第１の扉体に対する摩擦を低減させることができる。
【００１４】
【発明の実施の形態】
以下、本発明の一実施の形態について、図面を参照しながら説明する。
（実施の形態１）
図１は本実施の形態１における水位調整水門の要部正面図であり、図２は図１のＡ−Ａ線の要部矢視断面図であり、図３は図１のＢ−Ｂ線の要部矢視断面図である。
図中、１は本実施の形態１における水位調整水門、２は農業用水路や工業用水路等の用水路に配設される枠体、３は用水路の底部に沿って配設される枠体２の枠体底部、４ａ，４ｂは枠体底部３の両端部から用水路の両側壁に沿って各々立設された枠体側部、５は枠体側部４ａ，４ｂの上端部に横架された枠体上部、６は枠体側部４ａ，４ｂの各々の内側に対向して形成された後述の昇降溝部に両側部が遊嵌され昇降溝部に沿って摺動し枠体２内に昇降自在に配設された第１の扉体、６ａは第１の扉体６の用水路の上流側に向けて配設される上流側面、７は第１の扉体６の上端中央部に凹状に切り欠き形成された矩形状の切り欠き開口部、８ａ，８ｂは切り欠き開口部７の両側縁部に沿って第１の扉体６の上流側面６ａに固設された断面略Ｌ字形状の長尺部材からなる摺動溝形成部、９は摺動溝形成部８ａ，８ｂにより形成された後述の摺動溝部に両側部が遊嵌され摺動溝部に沿って摺動し切り欠き開口部７に開閉自在に配設された第２の扉体である。摺動溝形成部８ａ，８ｂは上側略半分が切り欠き開口部７の両側縁部に沿って配設され下側略半分はその下方に直線状に延設されている。これにより、摺動溝形成部８ａ，８ｂにより形成された後述の摺動溝部に遊嵌された第２の扉体９は、切り欠き開口部７を覆い閉止する最上位置と、切り欠き開口部７を開放する最下位置との間を昇降自在に配設されている。なお、図１乃至図３は第２の扉体９が切り欠き開口部７を覆った最上位置にある状態を示している。
【００１５】
１０ａ，１０ｂは第１の扉体６の上端部に固設され切り欠き開口部７の上部の両端部に水平方向に各々向き合って突設された係合部、１１は第１の扉体６の上流側面６ａに突設され第２の扉体９の下端部が最下位置において当接する下部ストッパ部、１２ａ，１２ｂは第１の扉体６の両側部の上流側面６ａに配設され第１の扉体６と枠体側部４ａ，４ｂとの間隙を塞いで水密にするための板状ゴム材等からなる側部水密部、１３ａ，１３ｂは側部水密部１２ａ，１２ｂを第１の扉体６に固定するための側部押さえ板、１４は後述の底部水密部を第１の扉体６に固定するための底部押さえ板、１５は第２の扉体９の上端部から水平方向に突設され第２の扉体９が最上位置にある場合に係合部１０ａ，１０ｂに係合する板状の係合受け部、１６は枠体上部５上に配設された後述の昇降機構部から下方へ垂下された長尺のピンラックからなる昇降接続部、１７は昇降接続部１６の下端部と第２の扉体９の上端部とを接続する扉体接続部である。扉体接続部１７は、第２の扉体９の上端部に用水路の上流側から下流側へ向けて拡がる断面略Ｖ字形状に形成された板状部材により形成されている。これにより、用水路の上流側の用水が第２の扉体９の上端から越流する際に、断面略Ｖ字形状の扉体接続部１７の受ける抵抗を少なくしスムーズに水を流すことができる。
【００１６】
１８は昇降接続部１６のピンラックに噛み合うピニオンを回転させ昇降接続部１６を介して第２の扉体９を昇降させる昇降機構部、１９は昇降機構部１８に接続されスプロケット２０，２１やチェーン２２、或いは昇降機構部１８に内蔵されたギア等を介して昇降機構部１８のピニオンを回転させるハンドル部である。ここで、昇降機構部１８はハンドル部１９の回転をピニオンに伝達するためのウォームギア及びウォームホイール等を有する回転伝達部、又はピニオン２５の回転を止めるストッパを有することが好ましい。これにより、第２の扉体９を所定の高さまで下降又は上昇させてハンドル部１９の回転操作を停止することにより、第２の扉体９を所定の高さで停止させることができる。また、回転伝達部のギア比を調整することにより、第１の扉体６や第２の扉体９の重量が大きい場合であっても、小さい力で容易に昇降させることができる。
【００１７】
図２において、２３は第１の扉体６の下端部に沿って配設され第１の扉体６と枠体底部３との間隙を塞いで水密にするための板状ゴム材等からなる底部水密部、２４は第２の扉体９の第１の扉体６側の下端部に沿って配設され第２の扉体９と第１の扉体６との間隙を用水路の水の水圧により塞いで水密にするためのゴム材等からなる水密圧接部、２４ａは水密圧接部２４を第２の扉体９の背面側下端部に固定するための押さえ板、２４ｂは水密圧接部２４に形成された孔、２５は昇降機構部１８に内蔵され昇降接続部１６のピンラックに噛み合うピニオンである。
図３において、２６ａ，２６ｂは枠体側部４ａ，４ｂの内側に形成された昇降溝部、２７ａ，２７ｂは摺動溝形成部８ａ，８ｂにより形成された摺動溝部、２８は第２の扉体９の第１の扉体６側の両側部に沿って配設され第２の扉体９と第１の扉体６との間隙を用水路の水の水圧により塞いで水密にするためのゴム材等からなる水密圧接部、２８ａは水密圧接部２８を第２の扉体９の背面側両側部に固定するための押さえ板、２８ｂは水密圧接部２８に形成された孔である。摺動溝部２７ａ，２７ｂは断面略Ｌ字形状の摺動溝形成部８ａ，８ｂと第１の扉体６の上流側面６ａとにより囲まれて形成されている。
図２に示す水密圧接部２４及び図３に示す水密圧接部２８は、その長手方向に内部に孔２４ｂ，２８ｂを有する長尺状のゴム材等により形成され、第２の扉体９の第１の扉体６側の下端部及び両端部に押さえ板２４ａ，２８ａにより第２の扉体９に狭まれビス及びナットにより螺着固定されている。
また、図３に示すように、板状ゴム材等により形成されている側部水密部１２ａ，１２ｂは、幅方向の一側部が側部押さえ板１３ａ，１３ｂに挟まれボルトナットにより螺着され第１の扉体６の上流側面６ａの両側部に沿って固定され、反対側の側部が枠体側部４ａ，４ｂの内側に沿うように湾曲して第１の扉体６と枠体側部４ａ，４ｂとの間隙を覆うように配設されている。
【００１８】
以上のように構成された本実施の形態１における水位調整水門について、以下その動作を図を用いて説明する。
図４（ａ）は本実施の形態１における水位調整水門の第２の扉体を下降させる途中の状態を示す要部正面図であり、図４（ｂ）はその要部断面図であり、図５（ａ）は本実施の形態１における水位調整水門の第２の扉体を最下位置まで下降させた状態を示す要部正面図であり、図５（ｂ）はその要部断面図であり、図６は本実施の形態１における水位調整水門の使用状態を示す使用状態図である。なお、図１乃至図３において説明したものは同様の符号を付けて説明を省略する。
図６において、Ｘは水位調整水門１が設置される用水路、Ｙは用水路Ｘの水位調整水門１の上流側（図６の手前側）から水田Ｚに連通する暗渠である。なお、図６は第２の扉体９を最上位置と最下位置の中間位置で停止させた状態を示す。
まず、図１乃至３に示すように第１の扉体６を最下部まで下降させた状態でハンドル部１９を第２の扉体９を下降させる方向に回転操作し、スプロケット２０、チェーン２２、スプロケット２１や、昇降機構部１８に内蔵されたウォームギアやウォームホイール等の回転伝達部を介してピニオン２５を回転させる。これにより、ピニオン２５に噛み合うピンラックからなる昇降接続部１６が下降し、図４（ａ）及び図４（ｂ）に示すように、扉体接続部１７を介して接続された第２の扉体９が下降する。これにより、用水路Ｘの水位調整水門１の上流側（図４（ａ）の手前側）の用水は切り欠き開口部７の開口部分から越流し下流側へ流れ込み、上流側の水位は第２の扉体９の上端部の高さに調整される。図６に示すように用水路Ｘの水位調整水門１の上流側は暗渠Ｙを介して水田Ｚに連通しているので、用水路Ｘの水位の下降に伴って水田Ｚの水位が下降し、用水路Ｘの水位と同じレベルに調整される。第２の扉体９を所定の高さまで下降させてハンドル部１９の回転操作を停止させることにより、第２の扉体９を所定の高さで停止させることができ、用水路Ｘの上流側の水位を所望のレベルに調整し維持することができ、水田Ｚの水位を所望のレベルに調整し維持することができる。さらにハンドル部１９を回転操作すると、図５（ａ）及び図５（ｂ）に示すように、第２の扉体９の下端部が下部ストッパ部１１に当接するまで、第２の扉体９を下降させることができる。
【００１９】
次に、第１の扉体６を上昇させ用水路を全開する動作について、図を用いて説明する。
図７は第１の扉体を上昇させ用水路を全開した状態を示す要部正面図である。なお、図１乃至図６において説明したものは同様の符号を付けて説明を省略する。
まず、図１乃至３に示すように第１の扉体６を最下部まで下降させた状態でハンドル部１９を第２の扉体９を上昇させる方向に回転操作し、スプロケット２０、チェーン２２、スプロケット２１や、昇降機構部１８に内蔵されたウォームギアやウォームホイール等を介してピニオン２５を回転させる。これにより、ピニオン２５に噛み合うピンラックからなる昇降接続部１６が上昇し、扉体接続部１７を介して第２の扉体９が上昇する。このとき、第２の扉体９の上端部に配設された係合受け部１５に、第１の扉体６の上端部に固定された係合部１０ａ，１０ｂが係合しているので、第２の扉体９の上昇に伴って第１の扉体６が上昇する。さらにハンドル部１９を回転操作すると、図７に示すように第２の扉体９と第１の扉体６が上昇して用水路Ｘが開放される。
【００２０】
以上のように実施の形態１の水位調整水門は構成されているので、以下のような作用を有する。
（１）第１の扉体６を最下部まで下降させた状態でハンドル部１９を第２の扉体９を下降させる方向に回転操作することにより、ピニオン２５に噛み合うピンラックからなる昇降接続部１６を下降させ、扉体接続部１７を介して接続された第２の扉体９を下降させ、これにより、用水路Ｘの水位調整水門１の上流側の用水は切り欠き開口部７の開口部分から下流側へ流れるので、上流側の水位を第２の扉体９の上端部の高さに調整することができる。
（２）用水路Ｘの水位調整水門１の上流側は暗渠Ｙを介して水田Ｚに連通しているので、用水路Ｘの水位を調整することにより水田Ｚの水位を用水路Ｘと同じレベルに調整することができる。
（３）第１の扉体６を最下部まで下降させた状態でハンドル部１９を第２の扉体９を上昇させる方向に回転操作することにより、ピニオン２５を回転させ、ピニオン２５に噛み合うピンラックからなる昇降接続部１６を上昇させ、扉体接続部１７を介して第２の扉体９を上昇させることができ、このとき、第２の扉体９の上端部に配設された係合受け部１５に、第１の扉体６の上端部に固定された係合部１０ａ，１０ｂが係合しているので、第２の扉体９と共に第１の扉体６を上昇させることができ、用水路Ｘを大きく開放することができる。
（４）切り欠き開口部７の幅が用水路Ｘの幅より小さく形成されると共に、第２の扉体９の上端部の高さを可変させることにより、用水路Ｘの上流側から下流側へ切り欠き開口部７の第２の扉体９の上端部から越流する水の流量を調整することができる。特に第１の扉体６の上端部に用水路Ｘの幅より幅の狭い切り欠き開口部７が形成されているので、上流側から切り欠き開口部７を介して下流側へ越流する水の流量を少なくすることができ、さらに少ない流量において流量を正確に且つ微調整することができる。
（５）第２の扉体９の第１の扉体６側の下端部及び両端部に水密圧接部２４及び水密圧接部２８が配設されているので、水位調整水門１の上流側に貯水された水の背圧により第２の扉体９と第１の扉体６との間隙を塞いで水密にすることができ、用水路の用水が上流側から下流側へ漏れ難く正確な調整を行うことができる。
（６）側部水密部１２ａ，１２ｂが第１の扉体６の上流側面６ａの両側部に沿って配設され、底部水密部２３が第１の扉体６の下端部に沿って配設されているので、第１の扉体６と枠体側部４ａ，４ｂ及び枠体底部３との間隙を塞いで水密にし、用水路の用水が上流側から下流側へ漏れ難く正確な調整を行うことができる。
（７）側部水密部１２ａ，１２ｂが第１の扉体６の上流側面６ａから枠体側部４ａ，４ｂの内側に沿うように湾曲して第１の扉体６と枠体側部４ａ，４ｂとの間隙を覆うように配設されているので、第１の扉体６が昇降溝部２６ａ，２６ｂに遊びを有して嵌合されている場合であっても、第１の扉体６のがたつき等に追随して確実に間隙を塞ぐことができ水密にすることができる。
（８）水密圧接部２４及び水密圧接部２８に孔２４ｂ及び孔２８ｂが形成されているので、水密圧接部２４，２８の柔軟性を高め、第１の扉体６との摩擦を低減させることができる。
（９）摺動溝形成部８ａ，８ｂの下端部側の第１の扉体６の上流側面６ａに下部ストッパ部１１が突設されているので、第２の扉体９が第１の扉体６の上流側面６ａに沿って下降し切り欠き開口部７を開放した状態で第２の扉体９の下端部が下部ストッパ部１１に当接し、第２の扉体９がそれ以上下方へ下降することを防ぐことができる。
【００２１】
（実施の形態２）
図８（ａ）は第１の扉体を最下部まで下降させた状態で第２の扉体が最上位置と最下位置の中間位置にある状態を示す概略側面図であり、図８（ｂ）は第１の扉体を最下部まで下降させた状態で第２の扉体が最上位置にある状態を示す概略側面図であり、図８（ｃ）は第１の扉体を第２の扉体と共に上昇させた状態を示す概略側面図である。
図８において、図１乃至７において説明したものと同様のものは同一の符号を付けて説明を省略する。
３０は本実施の形態２における水位調整水門、３０ａは水位調整水門３０の第１の扉体６に内蔵され第１の扉体６の昇降時に第１の扉体６を第２の扉体９に固定するための扉体固定機構部、３１は第２の扉体９の底部に第１の扉体６側に突出して形設された被係止部の一例である凸状部、３２は第１の扉体６の内部に配設され下端部が第１の扉体６に回動自在に軸着されたストッパレバー部、３３はストッパレバー部３２の上端部の凸状部３１側に形成されストッパレバー部３２の回動により凸状部３１に対して嵌脱自在に配設された係止部の一例である凹状部、３４はストッパレバー部３２に接続され凹状部３３を凸状部３１に向かって付勢する弾性部であるコイルばね、３５はストッパレバー部３２の軸着された下端部に略直角に連設されたレバー連設部、３６はレバー連設部３５の先端部に下方へ屈曲して形設されストッパレバー部３２及びレバー連設部３５の回動に連動して第１の扉体６の下端部から下方へ出入する突出部である。
凹状部３３は、本実施の形態１においては、凸状部３１の先端の上部側に当接する面と、下部側に当接する面とを有する凹状に形成されているが、これに限られるものではなく、下部側に当接する面のみを有する鉤状のものであってもよい。これにより、第２の扉体９を下降させる際に、凸状部３１の下部側で鉤状部分を押し下げ、第１の扉体６を押し下げることができる。
【００２２】
以上のように構成された本実施の形態２における水位調整水門３０について、以下その動作を図８を用いて説明する。
図８（ａ）に示すように、第１の扉体６を最下部まで下降させた状態で第２の扉体を上昇させる。このとき、第１の扉体６の下端部は枠体底部３に当接しているので、突出部３６は枠体底部３により第１の扉体６の内部へ納置されている。さらに第２の扉体９を上昇させると、図８（ｂ）に示すように、第２の扉体９の上端部に配設された係合受け部１５に第１の扉体６の上端部に固定された係合部１０ａが係合する。さらに第２の扉体９を上昇させると、係合部１０ａが係合受け部１５に係合しているので、第２の扉体９の上昇に伴って第１の扉体が上昇する。図８（ｃ）に示すように、ストッパレバー部３２がコイルばね３４により第２の扉体９側へ付勢されているので、第１の扉体６の下端部が枠体底部３から離れると、突出部３６が第１の扉体６の下端部から下方へ突出すると共に、ストッパレバー部３２の凹状部３３が凸状部３１に嵌合し、第１の扉体６と第２の扉体９を連結する。
また、第１の扉体６を上昇させた位置から第１の扉体６を最下部まで下降させると、第１の扉体６の下端部に突出した突出部３６が枠体底部３に当接し押し込まれて納置され、これに連動してレバー連設部３５及びストッパレバー部３２が回動し、凸状部３１に嵌合していた凹状部３３が凸状部３１から離れる方向へ移動し、嵌合していた凹状部３３が凸状部３１から外れる。
【００２３】
以上のように本実施の形態２における水位調整水門３０は構成されているので、実施の形態１の作用に加え、以下のような作用を有する。
（１）第１の扉体６の昇降時において、第１の扉体６の下端部が枠体底部３から離れるとストッパレバー部３２の凹状部３３が第２の扉体９の凸状部３１に嵌合するため、第１の扉体６は第２の扉体９に強固に固定される。これにより、第１の扉体６と第２の扉体９を一体的に昇降させることができ、例えば第１の扉体６が昇降溝部２６ａ，２６ｂにつまったゴミ等により下降途中で引っ掛かって第２の扉体９のみが下降することがなく確実に開閉動作を行うことができ、また、ゴミ等によるつまりがなくなって第１の扉体６が急に落下したりすることがないため安全性に優れる。
【００２４】
【発明の効果】
以上のように、本発明によれば、以下のような有利な効果が得られる。
請求項１に記載の発明によれば、
（１）昇降機構部により第２の扉体を下降させることにより、用水路の水位調整水門の上流側の水が下降した第２の扉体の上端部から越流し下流側へ流れ込むので、上流側の水位を第２の扉体の上端部の高さに調整することができ、水田の水位を用水路と同じレベルに調整することができる水位調整水門を提供することができる。
（２）昇降機構部により第２の扉体を上昇させると共に、第２の扉体の上端部に第１の扉体の上端部に固定され切り欠き開口部の上端部に水平方向に向き合って突設された係合部が係合して、第２の扉体と共に第１の扉体を上昇させることができ、用水路を大きく開放することができ、増水時であっても水が滞ることなく流れる安全性に優れた水位調整水門を提供することができる。
（３）第２の扉体の昇降させることにより連動して第１の扉体を昇降させることができるので、昇降のために１の昇降機構部を用いるだけでよく生産性及び操作性に優れた水位調整水門を提供することができる。
（４）切り欠き開口部の大きさを適宜設定すると共に第２の扉体の上端部の高さを可変させることにより、用水路の上流側から下流側へ切り欠き開口部の第２の扉体の上端部から越流する用水の流量を調整することができる水位調整水門を提供することができる。
（５）第１の扉体の上端部に用水路の幅より幅の小さい切り欠き開口部が形成され、切り欠き開口部から上流側の水が下流側へ越流するため、少ない流量において流量を正確に且つ微調整することができる流量調整の正確性に優れ且つ流量の微調整可能な水位調整水門を提供することができる。
（６）摺動溝部を形成する摺動溝形成部が第１の扉体の用水路の上流側の面に沿って配設されているので、第２の扉体が摺動溝部に遊嵌され第１の扉体の用水路の上流側の面に配設され、上流側から下流側への水の流れ又は水圧により第２の扉体を第１の扉体に圧接させることができ、第２の扉体と第１の扉体との間隙を水密にすることができる水密性に優れた水位調整水門を提供することができる。
【００２５】
請求項２に記載の発明によれば、請求項１の効果に加え、
（１）係止部を被係止部に係止することにより、第１の扉体は第２の扉体に強固に固定されるため、第１の扉体を上昇又は下降させる際に、第１の扉体と第２の扉体を一体的に上昇又は下降させることができ、例えば第１の扉体が昇降溝部につまったゴミ等により下降途中で引っ掛かって第２の扉体のみが下降することがなく確実に開閉動作を行うことができ、また、ゴミ等によるつまりがなくなって第１の扉体が急に落下したりすることがなく安全性に優れた水位調整水門を提供することができる。
（２）第１の扉体を最下部まで下降させると、係止部が被係止部から外れるようにした場合は、第１の扉体を最下部まで下降させた状態、即ち用水路を閉止した状態で、第２の扉体のみを下降又は上昇させ切り欠き開口部を開閉することができる使用性に優れた水位調整水門を提供することができる。
【００２６】
請求項３に記載の発明によれば、請求項１又は２の効果に加え、
（１）摺動溝形成部の下端部側の第１の扉体の上流側の面に下部ストッパ部が突設されているので、第２の扉体が第１の扉体の用水路の上流側の面に沿って下降し切り欠き開口部を開放した状態で第２の扉体の下端部が下部ストッパ部に当接し、第２の扉体がそれ以上下方へ下降することを防ぐことができる操作性及び使用性に優れた水位調整水門を提供することができる。
【００２７】
請求項４に記載の発明によれば、請求項１乃至３の内いずれか１項の効果に加え、
（１）第２の扉体が第１の扉体の用水路の上流側の面に配設されると共に、第２の扉体の第１の扉体側の下端部及び両端部に水密圧接部が配設されているので、上流側から下流側への用水の流れにより第２の扉体を第１の扉体に圧接させ、水密圧接部を第１の扉体に圧接させることができ、第２の扉体と第１の扉体との間隙を確実に水密にすることができる水密性に優れた水位調整水門を提供することができる。
【図面の簡単な説明】
【図１】実施の形態１における水位調整水門の要部正面図
【図２】図１のＡ−Ａ線の要部矢視断面図
【図３】図１のＢ−Ｂ線の要部矢視断面図
【図４】（ａ）実施の形態１における水位調整水門の第２の扉体を下降させる途中の状態を示す要部正面図
（ｂ）実施の形態１における水位調整水門の第２の扉体を下降させる途中の状態を示す要部断面図
【図５】（ａ）実施の形態１における水位調整水門の第２の扉体を最下位置まで下降させた状態を示す要部正面図
（ｂ）実施の形態１における水位調整水門の第２の扉体を最下位置まで下降させた状態を示す要部断面図
【図６】実施の形態１における水位調整水門の使用状態を示す使用状態図
【図７】第１の扉体を上昇させ用水路を全開した状態を示す要部正面図
【図８】（ａ）第１の扉体を最下部まで下降させた状態で第２の扉体が最上位置と最下位置の中間位置にある状態を示す概略側面図
（ｂ）第１の扉体を最下部まで下降させた状態で第２の扉体が最上位置にある状態を示す概略側面図
（ｃ）第１の扉体を第２の扉体と共に上昇させた状態を示す概略側面図
【符号の説明】
１水位調整水門
２枠体
３枠体底部
４ａ，４ｂ枠体側部
５枠体上部
６第１の扉体
６ａ上流側面
７切り欠き開口部
８ａ，８ｂ摺動溝形成部
９第２の扉体
１０ａ，１０ｂ係合部
１１下部ストッパ部
１２ａ，１２ｂ側部水密部
１３ａ，１３ｂ側部押さえ板
１４底部押さえ板
１５係合受け部
１６昇降接続部
１７扉体接続部
１８昇降機構部
１９ハンドル部
２０，２１スプロケット
２２チェーン
２３底部水密部
２４，２８水密圧接部
２４ａ，２８ａ押さえ板
２４ｂ，２８ｂ孔
２５ピニオン
２６ａ，２６ｂ昇降溝部
２７ａ，２７ｂ摺動溝部
３０水位調整水門
３０ａ扉体固定機構部
３１凸状部（被係止部）
３２ストッパレバー部
３３凹状部（係止部）
３４コイルばね（弾性部）
３５レバー連設部
３６突出部
Ｘ用水路
Ｙ暗渠
Ｚ水田[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention is arranged in an irrigation canal such as an agricultural irrigation canal or an industrial irrigation canal, and adjusts the water level on the upstream side of the irrigation canal, blocks and opens the irrigation canal, or is installed at an outlet side of an irrigation reservoir or aquaculture pond. It relates to a water level adjustment gate used for water level adjustment of a pond.
[0002]
[Prior art]
Conventionally, water levels are installed at the outlet side of irrigation and irrigation reservoirs and aquaculture ponds that are connected through culverts that communicate with the upstream of irrigation canals, etc. A regulating sluice is used. As such a water level adjustment floodgate, a stepped type in which a plurality of partition plates are erected at predetermined intervals so that the height gradually decreases from the upstream side to the downstream side of the waterway, or provided in the waterway. Frame, a main door disposed in the frame so as to be movable up and down, and a child door disposed in an opening formed by cutting out an upper end portion of the main door so as to be slidable upward and openable and closable. And those having a lifting mechanism for raising and lowering the parent door manually or automatically by a motor or the like in the frame.
However, the above-mentioned step-type water level adjustment floodgate requires removal and installation of the partition plates one by one so that a desired water level is obtained. was there. In the case of having a child door slidable upward at the upper end of the parent door, the waterway can be opened and closed by opening and closing the parent door, and water can be blocked or blocked, and the child door can be opened with the parent door lowered. By opening and closing, the water level on the upstream side can be adjusted finely to some extent, but the child door is slidably fitted upward in sliding grooves provided on the inner walls on both sides of the opening of the main door. The level at the lowermost end of the opening does not change, so that fine adjustment cannot be performed.After opening the child door, the worker monitors until the desired water level is reached and reaches the desired water level. When it reaches, it is necessary to perform an operation such as closing the child door, and there is a problem that the operation takes time and the workability is lacking.
In order to solve such a problem, Patent Literature 1 discloses “a lift door disposed in a water channel so as to be able to move up and down, a rotating door that is installed on the lift door so as to be able to move up and down, and the lift door is moved up and down. Lifting means, and pulling means for pulling up the revolving door, wherein the pulling means is connected to the revolving door, and a winding means is provided above the revolving door to wind up the resilient body. A two-stage gate device, comprising a tension applying means for applying tension to the string-shaped body in order to avoid loosening of the string-shaped body due to the rise of the lift door. I have.
Further, Patent Document 2 discloses that “a frame-shaped door stop attached to the discharge end of a water channel, a plurality of doors disposed adjacent to the front side of the door stop in the front-rear direction, A guide plate attached to the door stop corresponding to the front surface of both ends in the width direction, and a guide plate for guiding the ascending and descending of each door body, and an opening / closing device for suspending and elevating the frontmost door body is provided, A plurality of doors are provided with a locking portion that engages the lower surface of the front door body with the lower surface of the front door body during the ascent by which the front door body reaches the upper limit position by lifting by the opening / closing device, and that follows and raises the rear door body. A multistage movable weir provided on a door body other than the frontmost door body in the body is disclosed.
[0003]
[Patent Document 1]
JP-A-6-41937
[Patent Document 2]
JP-A-2002-227170
[0004]
[Problems to be solved by the invention]
However, the above conventional technology has the following problems.
(1) In the "two-stage gate device" of Patent Literature 1, the lift door and the revolving door are respectively raised and lowered or raised and lowered by separate drive devices. Therefore, two drive sources are required, the device becomes complicated, and productivity and productivity are improved. There was a problem of lack of operability.
(2) In the “multi-stage movable weir” of Patent Document 2, a plurality of doors are arranged adjacent to each other in the front-rear direction at a frame-shaped door stop, and a guide plate for guiding the ascending and descending of each door body at the door stop is provided. Since it is provided, at least two guide plates need to be provided at the door stop, and there is a problem that the device is large in the front-rear direction of the door stop and lacks compactness.
(3) In the "multi-stage movable weir" of Patent Document 2, since the bottom side of the irrigation canal is blocked by the doors when the front and rear doors are fully opened with the doors at the lower limit position, the water is increased when the water is increased. There is a problem that the flow may be stagnant and cause flood damage such as inundation under the floor, and the safety is lacking.
(4) In the “multi-stage movable weir” of Patent Document 2, from the upstream side by adjusting the height of the upper end portion of the front-stage door body among the multi-stage door bodies arranged adjacently in the front-rear direction. Adjusting the flow rate of water flowing to the downstream side, but it is difficult to adjust the flow rate by raising and lowering the front door body because the upper end of the front door body is wide, especially difficult to adjust at low flow rate Therefore, there is a problem that the usability is lacking.
[0005]
The present invention solves the above-mentioned conventional problems. Since the first door body can be moved up and down in conjunction with raising and lowering the second door body, one lifting mechanism is used for lifting and lowering. In addition to being excellent in productivity and operability alone, the irrigation canal can be fully opened and opened, so that even when water increases, water flows without interruption and is excellent in safety, and the second door is provided in the first door. An object of the present invention is to provide a water level adjusting floodgate that can easily and accurately adjust the flow rate of water flowing from an upstream side to a downstream side because the water level adjusting water gate is disposed in a concave notch opening.
[0006]
[Means for Solving the Problems]
In order to solve the above conventional problems, the present invention has the following configuration.
The water level adjusting sluice according to claim 1 of the present invention is disposed in an irrigation canal such as an agricultural irrigation canal or an industrial irrigation canal, and adjusts the flow rate of the irrigation canal, adjusts the water level on the upstream side of the irrigation canal, and blocks and opens the irrigation canal. A water level adjusting floodgate for performing, etc., a frame erected along both side walls of the irrigation channel, a lifting groove formed opposite to the inside of both sides of the frame, and a lifting groove, A first door body whose both ends are slidably loosely fitted and disposed inside the frame so as to be movable up and down, and a notch opening formed in the upper end of the first door body in a concave shape; A sliding groove formed on the upstream surface of the irrigation channel of the first door body, from the upper end to both sides along both sides of the cutout opening, and formed with a sliding groove opening inward. Both side ends are slidably loosely fitted in the groove forming portion and the sliding groove portion to open and close the notch opening. And a second door body disposed at an upper end of the first door body, and the second door body is horizontally protruded from both edges of an upper portion of the cutout opening. And an ascending / descending mechanism arranged at an upper portion of the frame for raising and lowering the second door.
With this configuration, the following operation is provided.
(1) The second door body in which the water on the upstream side of the water level adjustment floodgate in the irrigation canal has been lowered by lowering the second door body by the elevating mechanism with the first door body lowered to the lowest position. Since the water overflows from the upper end and flows downstream, the water level on the upstream side can be adjusted to the height of the upper end of the second door body. Since the upstream side of the water level adjustment floodgate of the irrigation canal communicates with the paddy field through the underdrain, the water level of the paddy field can be adjusted to the same level as the irrigation canal by adjusting the water level on the upstream side of the irrigation canal.
(2) The second door is raised by the elevating mechanism in a state where the first door is lowered to the lowest position, and is fixed to the upper end of the first door at the upper end of the second door. The engaging portion protruding in the horizontal direction is engaged with the upper end of the cutout opening, and the first door body can be raised together with the second door body, and the water channel is largely opened. be able to. In addition, since the first door body can be moved up and down in conjunction with the second door body being moved up and down, it is only necessary to use one elevating mechanism for elevating, so that productivity and operability are excellent.
(3) The size of the notch opening is appropriately set, and the height of the upper end of the second door body is varied, so that the second door body having the notch opening from the upstream side to the downstream side of the irrigation channel. It is possible to adjust the flow rate of the water flowing from the upper end of the water. In particular, a cutout opening having a width smaller than the width of the irrigation channel is formed at the upper end of the first door body, and since water on the upstream side flows downstream from the cutout opening, the flow rate can be accurately determined at a small flow rate. And it can be fine-tuned.
(4) Since the sliding groove forming portion forming the sliding groove portion is disposed along the upstream surface of the water channel of the first door body, the second door body is loosely fitted into the sliding groove portion. The second door can be pressed against the first door by the flow or the water pressure of the water from the upstream to the downstream, which is disposed on the upstream surface of the water channel of the first door. The gap between the door body and the first door body can be made watertight.
[0007]
Here, the frame body is formed of a steel material such as shaped steel or the like, and a rectangular shape or the like is used in which both side portions of the frame body are disposed along both side walls of the irrigation channel. It is not always necessary to provide the bottom of the frame, and when constructing the irrigation channel, a steel material or the like may be embedded in the side wall or the bottom wall of the irrigation channel to be erected and used as the side of the frame.
As the first and second doors, a metal plate or the like obtained by welding a metal plate to a frame made of steel or the like is used. Further, a rib or the like for reinforcement may be provided because the water pressure of the irrigation channel is applied.
The cutout opening formed at the upper end of the first door body is preferably formed in a rectangular shape or the like since a linear sliding groove forming portion is formed along both sides. If the notch opening is formed in a rectangular shape, if the width is formed smaller than the width of the irrigation channel, the flow rate of water flowing from the upstream side of the irrigation channel to the downstream side through the notch opening is reduced. By moving the second door body up and down, the flow rate can be accurately and finely adjusted at a small flow rate. The position where the notch opening is formed may be at the center of the upper end of the first door body or at the upper end side.
Since both end portions of the first door body are loosely fitted in the lifting groove, a watertight portion made of a rubber material or the like is provided to cover or fill a gap between the first door body and both side portions of the frame body. Is preferred. If a watertight portion such as a rubber material or a synthetic resin material is provided in a sliding portion between the lifting groove portion and the first door body, the first door body is difficult to slide smoothly due to friction. As the watertight portions on both sides of the frame, a belt-like shape is provided so as to be curved along the side of the frame from the surface of the first door and to cover the gap between the first door and the sliding groove. It is preferable to use a rubber material or the like. Further, it is preferable to provide a watertight portion made of a rubber material, a synthetic resin material, or the like, which is disposed along the lower end portion of the first door body and abuts on the bottom portion of the frame body.
As the sliding groove forming portion that forms the sliding groove portion, a long member such as a metal having a substantially L-shaped, U-shaped, or U-shaped cross section is used. The sliding groove forming portion may be fixed to the first door body by screwing or welding, or may be provided integrally. Further, a watertight portion made of a rubber material or the like may be provided at a sliding contact portion between the sliding groove portion and the second door body.
[0008]
The lifting mechanism includes a pinion that rotates by rotation of the handle, a long rack or a pin rack that meshes with the pinion and is connected to the upper end of the second door body, and rotates by rotation of the handle. One having a nut and a rod-shaped member formed with a screw that is inserted into and screwed into the nut and connected to the upper end of the second door, or one end connected to the upper end of the second door One having a hoisting pulley for winding up the other end of the wire, one having a movable lever or lever and a link connecting the second door to the movable lever or lever, or the like is used. Further, the lifting mechanism has a handle portion for manually lifting and lowering the second door body, or a drive unit such as a motor for automatically performing the rotation, and the rotation of the handle unit and the drive unit is transmitted to a pinion or a winding pulley. It may have a rotation transmitting section having a worm gear, a worm wheel, and the like for transmitting.
In addition, a chain or the like is wound around the handle portion by providing a worm gear and a worm wheel in the rotation transmission portion, or by providing a stopper for stopping rotation of the pinion or the hoisting pulley, or by fixing the handle portion to the frame. Accordingly, the first and second door bodies can be reliably stopped at predetermined positions, and fall can be prevented. Further, a hole is formed in each of the side portion of the frame body and the first door body when the first door body is located at a predetermined height, and a pin or the like is inserted into the hole to insert the hole. The door can be fixed at a predetermined position to prevent the door from falling.
If the door is not raised or lowered, a chain or the like for fixing to the frame is wrapped around the handle, and the chain is further locked, so that others can operate the handle without permission to raise and lower the door. Can be prevented.
[0009]
The invention according to claim 2 of the present invention is the water level adjustment floodgate according to claim 1, wherein the locking part formed on the first door body and the locking part formed on the second door body And a locked part to which the locking part is detachably locked.
This configuration has the following operation in addition to the operation of the first aspect.
(1) With the first door body lowered to the lowermost position, the second door body is lifted by the elevating mechanism, and fixed to the upper end of the first door body at the upper end of the second door body. When the first door body is lifted together with the second door body by engaging the engaged engagement part, the first door body is moved to the second door body by locking the locking part to the locked part. The first door body and the second door body can be integrally raised or lowered when the first door body is raised or lowered because the first door body is raised or lowered. The door body can be reliably opened and closed without being caught in the middle of the descent by the dust or the like in the elevating groove, and only the second door body is not lowered. Since the door body does not drop suddenly, the safety is excellent.
(2) When the first door body is lowered to the lowermost part, and the locking portion is disengaged from the locked part, the first door body is lowered to the lowermost part, that is, the water channel is closed. In this state, only the second door body can be lowered or raised to open and close the cutout opening.
[0010]
Here, a convex portion or a concave portion formed on the second door body side of the first door body, a claw portion, or the like is used as the locking portion, and a locked portion of the second door body is used as the locked portion. A concave portion or a convex portion formed at the lower end portion or the side portion to which the locking portion is locked or fitted, or a claw portion or the like is used. Alternatively, a pin may be used as the locking portion, and a hole into which the pin is inserted may be used as the locked portion.
As an attaching / detaching means for detachably engaging the engaging portion and the engaged portion, an engaging portion is provided at the other end of a lever or the like having one end pivotally attached to the first door body. Rotate to lock the locking part to the locked part so that it can be detached and attached, or arrange the locking part slidably on a rail etc. and move it freely to and from the locked part What was done is used. At this time, an elastic portion such as a coil spring for urging the locking portion toward the locked portion, a protruding portion protruding downward from the lower end portion of the first door body, It is also possible to provide an L-shaped crank, a lever, a link mechanism such as a lever, or the like that connects the parts. As a result, when the first door body descends to the lowermost part, the protruding portion comes into contact with the bottom of the frame body and is stored inside the first door body, and is interlocked with the locking portion via the link mechanism. Is detached from the locked portion. Further, when the first door body is lifted and the first door body moves away from the bottom of the frame, the protruding portion projects from the bottom of the first door body, and the locking portion is covered by the elastic portion in conjunction therewith. It is urged toward the locking portion and locked.
[0011]
The invention according to claim 3 of the present invention is the water level adjusting floodgate according to claim 1 or 2, wherein a lower surface of the sliding groove forming portion has an upstream surface of the first door body. It has a configuration provided with a projecting lower stopper portion.
With this configuration, the following operation is obtained in addition to the operation of the first or second aspect.
(1) Since the lower stopper portion protrudes from the upper surface of the first door body on the lower end side of the sliding groove forming portion, the second door body is located upstream of the water channel of the first door body. The lower end of the second door body abuts on the lower stopper in a state where the second door body is lowered along the side surface and the notch opening is opened, thereby preventing the second door body from lowering further downward. it can.
[0012]
The invention according to claim 4 of the present invention is the water level adjusting floodgate according to any one of claims 1 to 3, wherein a lower end of a surface of the second door body on the first door body side. And a watertight pressure-contact portion disposed along both ends.
With this configuration, in addition to the function of any one of claims 1 to 3, the following function is provided.
(1) The second door body is disposed on the surface of the first door body on the upstream side of the irrigation channel, and the watertight pressure contact portions are provided at the lower end and both ends of the second door body on the first door body side. Since it is provided, the second door body can be pressed against the first door body by the flow of water from the upstream side to the downstream side, and the watertight pressure-contact portion can be pressed against the first door body. The gap between the second door body and the first door body can be reliably made watertight.
[0013]
Here, a synthetic resin material such as a rubber material or a plastic material is used as the watertight pressure contact portion. Further, a long rubber material having a hole formed in the longitudinal direction therein may be used as the rubber material. Thereby, the flexibility of the rubber material can be increased, and the friction on the first door body can be reduced.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
(Embodiment 1)
FIG. 1 is a front view of a main part of a water level adjusting floodgate according to the first embodiment, FIG. 2 is a cross-sectional view taken along a line AA of FIG. 1, and FIG. 3 is a line BB of FIG. FIG. 3 is a cross-sectional view of a main part of FIG.
In the figure, reference numeral 1 denotes a water level adjusting sluice in the first embodiment, 2 denotes a frame disposed in an irrigation canal such as an agricultural canal or an industrial canal, and 3 denotes a frame of a frame 2 disposed along the bottom of the irrigation canal. Body bottom portions, 4a and 4b, are frame side portions erected from both ends of the frame bottom portion 3 along both side walls of the irrigation channel, and 5 is an upper portion of the frame body laterally laid on the upper end portions of the frame side portions 4a, 4b. , 6 are arranged so that both sides thereof are loosely fitted into the below-described elevating grooves formed opposite to the inside of each of the frame side parts 4a and 4b, and slide along the elevating grooves to be able to move up and down inside the frame 2. The first door body 6a is an upstream side surface disposed toward the upstream side of the irrigation channel of the first door body 6, and 7 has a concave cutout formed at the center of the upper end of the first door body 6. The rectangular cutout openings 8 a and 8 b are substantially L-shaped in cross section fixed to the upstream side surface 6 a of the first door body 6 along both side edges of the cutout opening 7. A sliding groove forming portion 9 made of a long member having a shape is provided with both sides loosely fitted in a sliding groove portion described later formed by the sliding groove forming portions 8a and 8b, and slides along the sliding groove portion to cut out. It is a second door body that is provided in the opening 7 so as to be freely opened and closed. The upper half of the sliding groove forming portions 8a and 8b is disposed along both side edges of the notch opening 7, and the lower substantially half extends linearly below the lower half. As a result, the second door body 9 loosely fitted in a sliding groove portion, which will be described later, formed by the sliding groove forming portions 8a and 8b, covers the notch opening portion 7 at the uppermost position, and the notch opening portion. 7 is disposed so as to be able to move up and down between the lowest position where the opening 7 is opened. FIGS. 1 to 3 show a state in which the second door 9 is at the uppermost position covering the cutout opening 7.
[0015]
10a and 10b are engaging portions which are fixed to the upper end of the first door body 6 and project from both ends of the upper part of the cutout opening 7 so as to face each other in the horizontal direction, and 11 denotes the first door body 6. The lower stopper portions 12a and 12b projecting from the upstream side surface 6a of the second door body 9 and contacting the lower end portion of the second door body 9 at the lowest position are disposed on the upstream side surfaces 6a on both side portions of the first door body 6. 1 is a side watertight portion made of a plate-like rubber material or the like for closing and closing the gap between the door body 6 and the frame body side portions 4a and 4b, and 13a and 13b are first watertight portions 12a and 12b. A side pressing plate for fixing to the door 6, 14 is a bottom pressing plate for fixing a bottom watertight portion to be described later to the first door 6, and 15 is a horizontal direction from an upper end of the second door 9. And a plate-shaped engagement receiving portion 16 which engages with the engaging portions 10a and 10b when the second door body 9 is at the uppermost position. An elevating connection part composed of a long pin rack suspended downward from an elevating mechanism part, which will be described later, provided on the body upper part 5, a lower end part 17 of an elevating connection part 16 and an upper end part of the second door body 9. Is a door connecting part. The door connecting portion 17 is formed of a plate-shaped member having a substantially V-shaped cross section that extends from the upstream side to the downstream side of the irrigation channel at the upper end of the second door body 9. Thereby, when the water on the upstream side of the water channel overflows from the upper end of the second door body 9, the resistance received by the door body connecting portion 17 having a substantially V-shaped cross section can be reduced and the water can flow smoothly. .
[0016]
Reference numeral 18 denotes an elevating mechanism for rotating a pinion meshing with a pin rack of the elevating connection 16 to elevate and lower the second door body 9 via the elevating connection 16, and 19 denotes a sprocket 20, 21 or a chain 22 connected to the elevating mechanism 18. Alternatively, it is a handle that rotates a pinion of the lifting mechanism 18 via a gear or the like built in the lifting mechanism 18. Here, the elevating mechanism 18 preferably has a rotation transmitting unit having a worm gear and a worm wheel for transmitting the rotation of the handle 19 to the pinion, or a stopper for stopping the rotation of the pinion 25. Thus, the second door 9 can be stopped at a predetermined height by lowering or raising the second door 9 to a predetermined height and stopping the rotation operation of the handle portion 19. Further, by adjusting the gear ratio of the rotation transmitting section, even when the first door body 6 and the second door body 9 are heavy, they can be easily moved up and down with a small force.
[0017]
In FIG. 2, reference numeral 23 denotes a plate-like rubber material or the like which is disposed along the lower end of the first door body 6 and closes the gap between the first door body 6 and the frame bottom 3 to make it watertight. The bottom watertight part 24 is disposed along the lower end of the second door body 9 on the first door body 6 side, and the gap between the second door body 9 and the first door body 6 is used for water in the irrigation canal. A watertight pressure contact portion made of a rubber material or the like for closing and watertight by water pressure, 24a is a pressing plate for fixing the watertight pressure contact portion 24 to the lower rear end of the second door body 9, and 24b is a watertight pressure contact portion 24. Are formed in the lifting mechanism 18 and engage with the pin racks of the lifting connection 16.
In FIG. 3, 26a and 26b are elevating grooves formed inside the frame side portions 4a and 4b, 27a and 27b are sliding grooves formed by the sliding groove forming portions 8a and 8b, and 28 is a second door body. A rubber material disposed along both sides of the first door body 6 to seal the gap between the second door body 9 and the first door body 6 with the water pressure of the irrigation channel to make it watertight. Reference numeral 28a denotes a pressing plate for fixing the watertight pressure contact portion 28 to both rear side portions of the second door body 9, and reference numeral 28b denotes a hole formed in the watertight pressure contact portion 28. The sliding groove portions 27a and 27b are formed by being surrounded by sliding groove forming portions 8a and 8b having a substantially L-shaped cross section and the upstream side surface 6a of the first door body 6.
The watertight pressure contact portion 24 shown in FIG. 2 and the watertight pressure contact portion 28 shown in FIG. 3 are formed of a long rubber material or the like having holes 24 b and 28 b inside thereof in the longitudinal direction. The first door body 6 is narrowed to the second door body 9 at the lower end portion and both end portions on the side of the door body 6 by pressing plates 24a and 28a, and is fixed by screws and nuts.
As shown in FIG. 3, the side watertight portions 12a and 12b formed of a plate-like rubber material or the like are sandwiched on one side in the width direction between the side pressing plates 13a and 13b and screwed with bolt nuts. The first door body 6 is fixed along both sides of the upstream side surface 6a of the first door body 6, and the opposite side parts are curved along the inside of the frame body side parts 4a and 4b to form the first door body 6 and the frame body side. It is provided so as to cover the gap between the portions 4a and 4b.
[0018]
The operation of the water level adjusting floodgate according to the first embodiment configured as described above will be described below with reference to the drawings.
FIG. 4A is a main part front view showing a state in which the second door body of the water level adjusting floodgate according to the first embodiment is being lowered, and FIG. 4B is a main part sectional view thereof. FIG. 5A is a main part front view showing a state in which the second door body of the water level adjusting floodgate according to the first embodiment is lowered to the lowest position, and FIG. 5B is a main part sectional view thereof. FIG. 6 is a use state diagram showing a use state of the water level adjustment floodgate according to the first embodiment. 1 to 3 are denoted by the same reference numerals and description thereof will be omitted.
In FIG. 6, X is a water channel in which the water level adjusting floodgate 1 is installed, and Y is a culvert communicating from the upstream of the water level adjusting floodgate 1 of the waterway X (the near side in FIG. FIG. 6 shows a state where the second door 9 is stopped at an intermediate position between the uppermost position and the lowermost position.
First, as shown in FIGS. 1 to 3, with the first door 6 lowered to the lowermost position, the handle 19 is rotated in the direction of lowering the second door 9, and the sprocket 20, the chain 22, The pinion 25 is rotated via a sprocket 21 and a rotation transmission unit such as a worm gear or a worm wheel built in the lifting mechanism 18. As a result, the elevating connection part 16 formed of a pin rack that meshes with the pinion 25 is lowered, and the second door body connected via the door body connection part 17 as shown in FIGS. 4A and 4B. 9 falls. As a result, the water on the upstream side of the water level adjusting floodgate 1 of the water channel X (on the front side in FIG. 4A) overflows from the opening of the cutout opening 7 and flows downstream, and the water level on the upstream side becomes the second water level. The height of the upper end of the door 9 is adjusted. As shown in FIG. 6, since the upstream side of the water level adjusting floodgate 1 of the irrigation canal X communicates with the paddy field Z through the culvert Y, the water level of the paddy field Z decreases with the lowering of the water level of the irrigation canal X. The water level is adjusted to the same level. By lowering the second door 9 to a predetermined height and stopping the rotation of the handle portion 19, the second door 9 can be stopped at a predetermined height, and the second door 9 can be stopped at a predetermined height. The water level can be adjusted and maintained at a desired level, and the water level of the paddy field Z can be adjusted and maintained at a desired level. When the handle 19 is further rotated, as shown in FIGS. 5A and 5B, the second door 9 is moved until the lower end of the second door 9 contacts the lower stopper 11. Can be lowered.
[0019]
Next, the operation of raising the first door body 6 and fully opening the water channel will be described with reference to the drawings.
FIG. 7 is a main part front view showing a state where the first door body is raised and the water channel is fully opened. 1 to 6 are denoted by the same reference numerals and description thereof will be omitted.
First, as shown in FIGS. 1 to 3, the handle 19 is rotated in a direction to raise the second door 9 with the first door 6 lowered to the lowermost position, and the sprocket 20, the chain 22, The pinion 25 is rotated via a sprocket 21, a worm gear, a worm wheel, or the like built in the lifting mechanism 18. As a result, the elevating connection part 16 formed of a pin rack that meshes with the pinion 25 rises, and the second door body 9 rises via the door body connection part 17. At this time, since the engagement portions 10a and 10b fixed to the upper end of the first door body 6 are engaged with the engagement receiving portion 15 arranged at the upper end of the second door body 9. The first door 6 rises with the elevation of the second door 9. When the handle 19 is further rotated, as shown in FIG. 7, the second door 9 and the first door 6 are raised, and the water channel X is opened.
[0020]
Since the water level adjusting floodgate of the first embodiment is configured as described above, it has the following operation.
(1) By rotating the handle portion 19 in the direction of lowering the second door member 9 with the first door member 6 lowered to the lowermost position, the lifting connection portion 16 composed of a pin rack meshing with the pinion 25 is operated. Is lowered, and the second door body 9 connected via the door body connecting portion 17 is lowered, so that the water on the upstream side of the water level adjustment gate 1 of the water channel X is opened from the opening of the notch opening 7. Since the water flows downstream, the water level on the upstream side can be adjusted to the height of the upper end of the second door body 9.
(2) The water level adjustment of the irrigation canal X Since the upstream side of the floodgate 1 is in communication with the paddy field Z via the culvert Y, the water level of the irrigation canal X is adjusted to the same level as the irrigation canal X by adjusting the water level of the irrigation canal X. be able to.
(3) By rotating the handle portion 19 in a direction to raise the second door body 9 with the first door body 6 lowered to the lowermost position, the pinion 25 is rotated and the pin rack meshes with the pinion 25. And the second door body 9 can be raised via the door body connection part 17. At this time, the engagement provided at the upper end of the second door body 9 Since the engaging portions 10a and 10b fixed to the upper end of the first door body 6 are engaged with the receiving portion 15, the first door body 6 can be raised together with the second door body 9. The irrigation canal X can be greatly opened.
(4) The width of the cutout opening 7 is formed to be smaller than the width of the irrigation channel X, and the height of the upper end portion of the second door body 9 is varied to cut the irrigation channel X from the upstream side to the downstream side. The flow rate of water flowing from the upper end of the second door body 9 of the opening 7 can be adjusted. In particular, since the notch opening 7 having a width smaller than the width of the irrigation channel X is formed at the upper end of the first door body 6, water flowing from the upstream side to the downstream side through the notch opening 7 through the notch opening 7 is formed. The flow rate can be reduced, and the flow rate can be accurately and finely adjusted at a lower flow rate.
(5) Since the watertight pressure contact portions 24 and the watertight pressure contact portions 28 are provided at the lower end and both ends of the second door 9 on the side of the first door 6, the water is stored upstream of the water level adjusting floodgate 1. With the back pressure of the water, the gap between the second door body 9 and the first door body 6 can be closed to make the watertight, and the water in the irrigation channel is less likely to leak from the upstream side to the downstream side, thereby performing accurate adjustment. be able to.
(6) The side watertight portions 12a and 12b are provided along both sides of the upstream side surface 6a of the first door body 6, and the bottom watertight portion 23 is provided along the lower end portion of the first door body 6. Therefore, the gap between the first door body 6 and the frame body side portions 4a, 4b and the frame body bottom portion 3 is closed to be watertight, and accurate adjustment is made such that the water in the waterway hardly leaks from the upstream side to the downstream side. Can be.
(7) The side watertight portions 12a and 12b are curved from the upstream side surface 6a of the first door body 6 along the inside of the frame body side portions 4a and 4b, and the first door body 6 and the frame body side portions 4a and 4b. Is disposed so as to cover the gap between the first door body 6 and the first door body 6 even if the first door body 6 is fitted with play into the elevating grooves 26a and 26b. The gap can be reliably closed following the rattling or the like, and the watertightness can be achieved.
(8) Since the holes 24b and the holes 28b are formed in the watertight pressure contact portions 24 and 28, the flexibility of the watertight pressure contact portions 24 and 28 is increased, and the friction with the first door body 6 is reduced. Can be.
(9) Since the lower stopper 11 protrudes from the upstream side surface 6a of the first door body 6 on the lower end side of the sliding groove forming parts 8a, 8b, the second door body 9 is the first door. The lower end of the second door body 9 abuts on the lower stopper 11 with the notch opening 7 opened down along the upstream side surface 6a of the body 6, and the second door body 9 is further lowered further. It can be prevented from descending.
[0021]
(Embodiment 2)
FIG. 8A is a schematic side view showing a state where the second door body is at an intermediate position between the uppermost position and the lowermost position with the first door body lowered to the lowest position, and FIG. 8) is a schematic side view showing a state in which the first door body is lowered to the lowermost position and the second door body is at the uppermost position, and FIG. It is a schematic side view which shows the state lifted with the door body.
8, the same components as those described in FIGS. 1 to 7 are denoted by the same reference numerals, and description thereof will be omitted.
Reference numeral 30 denotes a water level adjusting floodgate according to the second embodiment, and reference numeral 30a denotes a built-in first door body 6 of the water level adjusting floodgate 30. When the first door body 6 moves up and down, the first door body 6 is connected to the second door body 9. And 31 is a convex portion which is an example of a locked portion formed on the bottom of the second door 9 so as to protrude toward the first door 6. A stopper lever portion 33 which is disposed inside the first door body 6 and has a lower end pivotally attached to the first door body 6 so as to be rotatable, and a stopper lever 33 is provided at the upper end of the stopper lever portion 32 on the side of the convex portion 31. A concave portion 34 which is an example of a locking portion which is formed and is disposed so as to be detachably fitted to the convex portion 31 by the rotation of the stopper lever portion 32, a concave portion 34 is connected to the stopper lever portion 32 and the concave portion 33 has a convex shape. A coil spring 35, which is an elastic portion that urges toward the portion 31, is provided substantially at right angles to the lower end of the stopper lever 32 on which the shaft is mounted. The lever connecting portion 36 is bent downward at the distal end of the lever connecting portion 35 and is formed at the lower end of the first door body 6 in conjunction with the rotation of the stopper lever portion 32 and the lever connecting portion 35. It is a protruding part that goes in and out from the part.
In the first embodiment, the concave portion 33 is formed in a concave shape having a surface that abuts on the upper side of the tip of the convex portion 31 and a surface that abuts on the lower side, but is not limited thereto. Instead, it may be a hook-like member having only a surface that contacts the lower side. Thereby, when lowering the second door body 9, the hook-shaped portion can be pushed down at the lower side of the convex portion 31, and the first door body 6 can be pushed down.
[0022]
The operation of the water level adjusting floodgate 30 according to the second embodiment configured as described above will be described below with reference to FIG.
As shown in FIG. 8A, the second door is raised with the first door 6 lowered to the lowermost position. At this time, since the lower end of the first door 6 is in contact with the frame bottom 3, the projecting portion 36 is placed inside the first door 6 by the frame bottom 3. When the second door 9 is further raised, as shown in FIG. 8B, the upper end of the first door 6 is inserted into the engagement receiving portion 15 disposed at the upper end of the second door 9. The engaging portion 10a fixed to the portion engages. When the second door body 9 is further raised, the first door body is raised with the rise of the second door body 9 because the engagement portion 10a is engaged with the engagement receiving portion 15. As shown in FIG. 8C, since the stopper lever 32 is urged toward the second door 9 by the coil spring 34, the lower end of the first door 6 separates from the frame bottom 3. And the protrusion 36 projects downward from the lower end of the first door body 6, and the concave portion 33 of the stopper lever 32 fits into the convex portion 31, and the first door body 6 and the second door The door 9 is connected.
When the first door 6 is lowered from the position where the first door 6 has been raised to the lowermost position, the projecting portion 36 projecting from the lower end of the first door 6 hits the frame bottom 3. The lever connection portion 35 and the stopper lever portion 32 rotate in conjunction with this, and the concave portion 33 fitted to the convex portion 31 moves away from the convex portion 31. The concave portion 33 that has been moved is disengaged from the convex portion 31.
[0023]
As described above, the water level adjusting floodgate 30 according to the second embodiment is configured, and thus has the following operation in addition to the operation of the first embodiment.
(1) When the lower end of the first door 6 moves away from the bottom 3 of the frame when the first door 6 moves up and down, the concave portion 33 of the stopper lever 32 becomes a convex portion of the second door 9. The first door 6 is firmly fixed to the second door 9 because the first door 6 is fitted to the first door 31. Thereby, the first door body 6 and the second door body 9 can be moved up and down integrally. For example, the first door body 6 is caught in the middle of the descent by dust or the like clogged in the up / down grooves 26a, 26b. Only the second door body 9 can be reliably opened and closed without descending, and the first door body 6 does not drop suddenly due to no clogging due to dust or the like, so that it is safe. Excellent in nature.
[0024]
【The invention's effect】
As described above, according to the present invention, the following advantageous effects can be obtained.
According to the first aspect of the present invention,
(1) By lowering the second door body by the elevating mechanism, the water on the upstream side of the water level adjusting floodgate of the irrigation channel overflows from the upper end of the lowered second door body and flows to the downstream side. Can be adjusted to the height of the upper end portion of the second door body, and the water level of the paddy can be adjusted to the same level as the irrigation canal.
(2) The second door body is lifted by the elevating mechanism, and is fixed to the upper end of the first door body at the upper end of the second door body and horizontally faces the upper end of the cutout opening. The protruding engagement portion is engaged, the first door body can be raised together with the second door body, the irrigation canal can be largely opened, and water remains even when the water is increased. It is possible to provide a water level adjustment floodgate with excellent safety without flowing.
(3) Since the first door body can be moved up and down in conjunction with raising and lowering the second door body, it is sufficient to use only one lifting mechanism for raising and lowering, and it is excellent in productivity and operability. Water level adjustment floodgates can be provided.
(4) The size of the notch opening is appropriately set and the height of the upper end portion of the second door body is varied, so that the second door body of the notch opening from the upstream side to the downstream side of the irrigation channel. And a water level adjusting gate capable of adjusting the flow rate of the water flowing from the upper end of the water level.
(5) A cutout opening having a width smaller than the width of the irrigation channel is formed at the upper end of the first door body, and water on the upstream side flows from the cutout opening to the downstream side. It is possible to provide a water level adjustment gate that is excellent in the accuracy of flow rate adjustment that can be accurately and finely adjusted and that can finely adjust the flow rate.
(6) Since the sliding groove forming portion forming the sliding groove portion is provided along the upstream surface of the water channel of the first door body, the second door body is loosely fitted into the sliding groove portion. The second door can be pressed against the first door by the flow or the water pressure of the water from the upstream to the downstream, which is disposed on the upstream surface of the water channel of the first door. A water level adjusting gate with excellent watertightness that can make the gap between the door body and the first door body watertight can be provided.
[0025]
According to the invention described in claim 2, in addition to the effect of claim 1,
(1) Since the first door body is firmly fixed to the second door body by locking the locking part to the locked part, when the first door body is raised or lowered, The first door body and the second door body can be raised or lowered integrally. For example, the first door body is caught in the middle of the descent by dust or the like caught in the elevating groove, and only the second door body is moved. Provided is a water level adjusting floodgate that can perform opening and closing operations reliably without descending, and that is excellent in safety without being clogged by dust or the like and the first door body does not drop suddenly. be able to.
(2) When the first door body is lowered to the lowermost part, and the locking portion is disengaged from the locked part, the first door body is lowered to the lowermost part, that is, the water channel is closed. In this state, it is possible to provide a water level adjustment gate excellent in usability that can lower or raise only the second door body to open and close the cutout opening.
[0026]
According to the invention described in claim 3, in addition to the effect of claim 1 or 2,
(1) Since the lower stopper portion protrudes from the upper surface of the first door body on the lower end side of the sliding groove forming portion, the second door body is located upstream of the water channel of the first door body. The lower end of the second door body abuts on the lower stopper in a state where the second door body is lowered along the side surface and the notch opening is opened, thereby preventing the second door body from lowering further downward. A water level adjustment gate excellent in operability and usability can be provided.
[0027]
According to the invention described in claim 4, in addition to the effect of any one of claims 1 to 3,
(1) The second door body is disposed on the surface of the first door body on the upstream side of the irrigation channel, and the watertight pressure contact portions are provided at the lower end and both ends of the second door body on the first door body side. Since it is provided, the second door body can be pressed against the first door body by the flow of water from the upstream side to the downstream side, and the watertight pressure-contact portion can be pressed against the first door body. It is possible to provide a water level adjusting gate with excellent watertightness, which can surely make the gap between the second door body and the first door body watertight.
[Brief description of the drawings]
FIG. 1 is a front view of a main part of a water level adjusting floodgate according to a first embodiment.
FIG. 2 is a cross-sectional view taken along line AA of FIG.
FIG. 3 is a sectional view taken along line BB of FIG.
FIG. 4A is a main part front view showing a state where the second door body of the water level adjustment floodgate according to the first embodiment is being lowered.
(B) Principal part cross-sectional view showing a state where the second door body of the water level adjustment floodgate in the first embodiment is being lowered.
FIG. 5A is a main part front view showing a state where the second door body of the water level adjusting floodgate according to the first embodiment is lowered to the lowest position;
(B) Main part sectional view showing a state where the second door body of the water level adjustment floodgate in the first embodiment has been lowered to the lowest position.
FIG. 6 is a use state diagram showing a use state of a water level adjusting floodgate in the first embodiment.
FIG. 7 is a front view of a main part showing a state in which the first door body is raised and a water channel is fully opened.
FIG. 8A is a schematic side view showing a state in which the second door is at an intermediate position between the uppermost position and the lowermost position with the first door being lowered to the lowermost position;
(B) A schematic side view showing a state in which the second door body is at the uppermost position with the first door body lowered to the lowermost position.
(C) A schematic side view showing a state where the first door body is raised together with the second door body.
[Explanation of symbols]
1 water level adjustment floodgate
2 Frame
3 Frame bottom
4a, 4b Frame body side
5 Upper frame
6 First door
6a Upstream side
7 Notch opening
8a, 8b Sliding groove forming part
9 Second door
10a, 10b engaging portion
11 Lower stopper
12a, 12b Side watertight part
13a, 13b Side holding plate
14 Bottom holding plate
15 Engagement receiving part
16 lifting connection
17 Door body connection
18 Lifting mechanism
19 Handle part
20,21 sprocket
22 chain
23 Watertight bottom
24, 28 Watertight pressure contact part
24a, 28a Holding plate
24b, 28b holes
25 pinion
26a, 26b lifting groove
27a, 27b Sliding groove
30 Water level adjustment floodgate
30a Door body fixing mechanism
31 convex part (locked part)
32 Stopper lever
33 concave part (locking part)
34 coil spring (elastic part)
35 Lever connecting part
36 Projection
X Canal
Y culvert
Z paddy field

Claims

A water level adjustment gate disposed in an irrigation canal such as an agricultural irrigation canal or an industrial irrigation canal, for adjusting the flow rate of the irrigation canal, adjusting the water level on the upstream side of the irrigation canal, blocking the irrigation canal, opening the irrigation canal, and the like,
A frame erected along both side walls of the irrigation channel,
Elevating grooves each formed facing the inside of both sides of the frame,
A first door body in which both side ends are slidably and loosely fitted in the elevating groove portion and are arranged movably up and down inside the frame body;
A notch opening formed in a notch in a concave shape at an upper end of the first door body,
A sliding groove forming section which is formed on an upstream surface of the water channel of the first door body from an upper end portion downward along both sides of the cutout opening and forms a sliding groove section which is opened inward; When,
A second door body in which both side ends are slidably loosely fitted in the sliding groove portion and the cutout opening portion is freely opened and closed;
An engaging portion fixed to an upper end portion of the first door body and projecting from both edges of an upper portion of the cutout opening so as to face each other in a horizontal direction and engaged with an upper end portion of the second door body; When,
An elevating mechanism disposed at an upper portion of the frame for elevating the second door,
A water level adjusting floodgate comprising:

A locking portion formed on the first door body, and a locked portion formed on the second door body and the locking portion is removably locked. The water level adjusting floodgate according to claim 1.

The water level adjusting floodgate according to claim 1, further comprising a lower stopper protruding from an upstream surface of the first door body on a lower end side of the sliding groove forming portion. .

4. A watertight pressure contact portion provided along a lower end portion and both end portions of a surface of the second door body on the side of the first door body. The water level adjustment floodgate described in the paragraph.