JP5393403B2 - Backflow prevention gate - Google Patents

Backflow prevention gate Download PDF

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JP5393403B2
JP5393403B2 JP2009253878A JP2009253878A JP5393403B2 JP 5393403 B2 JP5393403 B2 JP 5393403B2 JP 2009253878 A JP2009253878 A JP 2009253878A JP 2009253878 A JP2009253878 A JP 2009253878A JP 5393403 B2 JP5393403 B2 JP 5393403B2
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door body
backflow prevention
locking means
flow path
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JP2011099232A (en
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洋士 山本
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開成工業株式会社
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本発明は、河川側や海洋側と水路側との水位差に応じて起伏動作することにより河川や海洋側からの水の逆流を防止する機能を備えた浮力式の逆流防止ゲートに関する。   The present invention relates to a buoyancy-type backflow prevention gate having a function of preventing a backflow of water from a river or the ocean side by performing ups and downs according to a water level difference between the river side or the ocean side and a water channel side.

従来、河川管理施設としての樋門や樋管には、集中豪雨などで河川が増水したときの逆流を防止するため浮力式の逆流防止ゲートが設置されている例がある。浮力式の逆流防止ゲートは、一定方向に水を流す流路の底面に水中で浮力を生ずる扉体を、水平軸を中心に起伏自在に軸支した構造である。また、浮力式の逆流防止ゲートは、満潮などによって潮位が上昇した場合に、海水が河川側へ逆流することを防止する管理設備として採用されることもある。   Conventionally, in Xiamen and Xiamen as river management facilities, there is an example in which a buoyancy type backflow prevention gate is installed in order to prevent a backflow when the river is increased due to heavy rain. The buoyancy-type backflow prevention gate has a structure in which a door body that generates buoyancy in water is supported on a bottom surface of a flow path for flowing water in a certain direction so as to be undulated about a horizontal axis. The buoyancy-type backflow prevention gate is sometimes used as a management facility that prevents seawater from flowing back to the river side when the tide level rises due to high tide or the like.

平常時は流路の上流側の水位が高いので、浮力式の逆流防止ゲートの扉体は下流側へほぼ水平に倒伏した状態にあり、水は扉体を乗り越えて流路の上流側から下流側に向かって一定方向に流れている。   Since the water level on the upstream side of the flow path is high during normal times, the door body of the buoyancy type backflow prevention gate is in a state of lying down almost horizontally to the downstream side, and the water gets over the door body and flows downstream from the upstream side of the flow path It flows in a certain direction toward the side.

一方、集中豪雨などで河川が増水し、流路の下流側の水位が上昇すると、扉体は水の浮力によって上流側に起立した状態となるため、流路内に、下流側から上流側に向かう逆流が発生するのを防止することができる。   On the other hand, when the river increases due to heavy rain and the water level on the downstream side of the flow path rises, the door body stands up on the upstream side due to the buoyancy of the water, so in the flow path from the downstream side to the upstream side. It is possible to prevent a backward flow from occurring.

また、浮力式の逆流防止ゲートにおいては、管理あるいは貯水を目的として扉体を起伏させるためのワイヤ式巻上機が設置される場合がある。ワイヤ式巻上機が設置された、浮力式の逆流防止ゲートにおいては、浮力による扉体の起伏動作により、ワイヤが緩んで、巻上機のドラムからワイヤが外れ、その後の巻き上げ動作が不能になる場合がある。   Moreover, in the buoyancy type backflow prevention gate, a wire type hoisting machine for raising and lowering the door body for the purpose of management or water storage may be installed. In a buoyancy-type backflow prevention gate equipped with a wire hoisting machine, the wire loosens due to the undulation action of the door body due to buoyancy, and the wire comes off from the drum of the hoisting machine, making the subsequent hoisting operation impossible. There is a case.

このような問題を解決するため、巻き上げ用のワイヤに張力を付与する重錘としてのアームの基端部を扉体に回転自在に軸着し、このアームの先端部に前記ワイヤを取り付けたものがある（例えば、特許文献１参照。）。   In order to solve such a problem, a base end portion of an arm as a weight for applying tension to a wire for winding is rotatably attached to a door body, and the wire is attached to the distal end portion of the arm. (For example, refer to Patent Document 1).

特許文献１記載の転倒ゲートにおいては、一旦転倒した扉体が水位の上昇に伴って起立した状態となったとき、重錘としてのアームによりワイヤに張力が付与されるので、ワイヤが弛んで巻上機から外れることがない。   In the overturning gate described in Patent Document 1, when the door body once overturned is in a standing state as the water level rises, tension is applied to the wire by the arm as a weight, so the wire is loosened and wound. It will not come off the upper machine.

特許第２９６４０４６号公報Japanese Patent No. 2964046

特許文献１記載の転倒ゲートの場合、ワイヤを巻き上げて扉体を起立させたときアーム部分は巻上機で巻き取ることができないので、アーム無しの場合に比べ、このアームの長さに相当する分だけ高い位置に巻上機を設置する必要がある。このため、巻上機の設置場所となる流路側壁が低いときは、巻上機設置用の基礎構造を高く形成しなければならないので、建設資材が増大しがちであり、施工性も良くない。   In the case of the overturning gate described in Patent Document 1, the arm portion cannot be wound up by a hoist when the door is raised by winding up the wire, which corresponds to the length of this arm compared to the case without an arm. It is necessary to install the hoisting machine at a higher position. For this reason, when the flow passage side wall where the hoisting machine is installed is low, the foundation structure for installing the hoisting machine must be formed high, so the construction materials tend to increase and the workability is not good. .

また、特許文献１記載の転倒ゲートの場合、扉体が起伏するときのアームの動作領域を確保するため、流路の上面が開放されていなければならないので、四方水密構造の流路への設置は極めて困難である。   In addition, in the case of the overturn gate described in Patent Document 1, the upper surface of the flow path must be opened in order to secure the operating area of the arm when the door body is raised and lowered, so that it is installed in the flow path of the four-way watertight structure Is extremely difficult.

本発明が解決しようとする課題は、施工が容易であり、ワイヤ弛緩に起因する巻上機ドラムからのワイヤ離脱が発生し難く、四方水密構造の流路にも設置可能な浮力式の逆流防止ゲートを提供することにある。   The problem to be solved by the present invention is that buoyancy-type backflow prevention that is easy to install, is less likely to cause wire detachment from the hoisting drum due to wire relaxation, and can be installed in a flow path of a four-way watertight structure To provide a gate.

本発明の逆流防止ゲートは、流路の底部に起伏可能に配置され水中で浮力を生じる扉体と、係止手段を介して先端側が前記扉体に繋がれたワイヤと、前記ワイヤの基端側を巻き取る巻上機と、を備え、前記扉体の起伏範囲内において前記係止手段が前記ワイヤの長手方向に沿ってスライド可能であることを特徴とする。   The backflow prevention gate of the present invention includes a door body that can be raised and lowered at the bottom of the flow path and generates buoyancy in water, a wire having a distal end connected to the door body via a locking means, and a base end of the wire And a hoisting machine that winds the side, wherein the locking means is slidable along the longitudinal direction of the wire within the undulation range of the door body.

このような構成とすれば、倒伏状態にある扉体が起立するとき係止手段がワイヤの長手方向に沿ってスライドするので、ワイヤの先端側が扉体とともに持ち上がってワイヤが弛緩することがなくなり、ワイヤ弛緩に起因する巻上機ドラムからのワイヤ離脱を防止することができる。また、扉体の起伏範囲内においてワイヤの長手方向に沿ってスライド可能な係止手段を介して当該ワイヤの先端側を扉体に繋いだ簡素な構造であるため、施工は容易である。さらに、ワイヤの先端側と扉体との間は係止手段で繋がれているが、巻上機でワイヤを巻き取って扉体を起立させたとき、扉体より高く突出する部材や巻上機と扉体との間に収まらない部材が存在しないので、四方水密構造の流路にも設置可能である。   With such a configuration, the locking means slides along the longitudinal direction of the wire when the door body in the lying state stands up, so that the wire does not lift up with the door body and the wire is not loosened. Wire detachment from the hoisting drum due to wire relaxation can be prevented. In addition, the construction is easy because it has a simple structure in which the leading end side of the wire is connected to the door body via a locking means that can slide along the longitudinal direction of the wire within the undulating range of the door body. Furthermore, although the tip side of the wire and the door body are connected by locking means, when the wire is wound up by a hoisting machine and the door body is raised, a member or hoisting that protrudes higher than the door body Since there is no member that does not fit between the machine and the door body, it can also be installed in a flow path having a four-way watertight structure.

ここで、前記係止手段として、前記ワイヤをスライド可能に把持する把持部材を設け、前記把持部材のスライドを阻止するためのストッパを前記ワイヤの先端側に設けることが望ましい。このような構成とすれば、簡素な構造でありながら、ワイヤ巻き上げによる扉体の起立動作に支障を与えることなく、ワイヤに対する確実なスライド機能を確保することができるので、優れた弛緩防止効果を得ることができる。   Here, it is preferable that a gripping member for slidably gripping the wire is provided as the locking means, and a stopper for preventing the gripping member from sliding is provided on the distal end side of the wire. With such a configuration, although it has a simple structure, it can secure a reliable sliding function for the wire without hindering the standing operation of the door body by winding the wire, so it has an excellent relaxation prevention effect. Can be obtained.

また、前記ストッパが、前記ワイヤに張力を付与するための重錘としての機能を有することが望ましい。このような構成とすれば、扉体がどの傾斜角度にあっても、ワイヤが常に引っ張られた状態に保たれるため、ワイヤの弛緩防止機能がさらに向上する。
Further, the stopper is Rukoto to have a function as a weight for imparting tension to the wire is desirable. With such a configuration, since the wire is always kept pulled regardless of the inclination angle of the door body, the wire relaxation prevention function is further improved.

本発明により、施工が容易であり、ワイヤ弛緩に起因する巻上機ドラムからのワイヤ離脱が発生し難く、四方水密構造の流路にも設置可能な浮力式の逆流防止ゲートを提供することができる。   According to the present invention, it is possible to provide a buoyancy-type backflow prevention gate that can be easily installed in a flow path of a four-way watertight structure, which is easy to construct, does not easily cause wire detachment from the hoisting drum due to wire relaxation. it can.

本発明の実施形態である逆流防止ゲートを示す平面図である。It is a top view which shows the backflow prevention gate which is embodiment of this invention. 図１のＡ−Ａ線における断面図である。It is sectional drawing in the AA of FIG. 図１の矢線Ｂで示す部分の一部省略拡大図である。FIG. 2 is a partially omitted enlarged view of a portion indicated by an arrow B in FIG. 1. 図２の矢線Ｃで示す部分の一部省略拡大図である。FIG. 3 is a partially omitted enlarged view of a portion indicated by an arrow C in FIG. 2. 図１に示す逆流防止ゲートを構成する係止手段の機能を示す図である。It is a figure which shows the function of the latching means which comprises the backflow prevention gate shown in FIG. 図１に示す逆流防止ゲートの作動状態を示す図である。It is a figure which shows the operating state of the backflow prevention gate shown in FIG. 図６中の矢線Ｘ状態における逆流防止ゲートの一部省略拡大図である。FIG. 7 is a partially omitted enlarged view of a backflow prevention gate in the state of arrow X in FIG. 6.

図１〜図４に示すように、本発明の実施形態である浮力式の逆流防止ゲート１０は、流路１１の底部１１ｂに支承部１２を介して起伏可能に配置され水中で浮力を生じる扉体１３と、係止手段１４を介して先端側が扉体１３に繋がれたワイヤ１５と、ワイヤ１５の基端側を巻き取る巻上機１６と、を備え、扉体１３の起伏範囲１７内において係止手段１４がワイヤ１５の長手方向１５Ｌに沿ってスライド可能である。支承部１２は流路１１の水流方向Ｒと直交する方向の支軸１２ａを有し、この支軸１２ａを中心に扉体１３が回動して起伏することにより、流路１１の開閉が行われる。   As shown in FIGS. 1 to 4, a buoyancy-type backflow prevention gate 10 according to an embodiment of the present invention is disposed on a bottom 11 b of a flow path 11 so as to be able to undulate via a support portion 12 and generates buoyancy in water. A body 15, a wire 15 having a distal end connected to the door body 13 through a locking means 14, and a hoisting machine 16 that winds up the proximal end side of the wire 15. The locking means 14 is slidable along the longitudinal direction 15L of the wire 15. The support portion 12 has a support shaft 12a in a direction orthogonal to the water flow direction R of the flow path 11, and the door body 13 rotates around the support shaft 12a to be undulated, thereby opening and closing the flow path 11. Is called.

係止手段１４は、ワイヤ１５をその長手方向１５Ｌに沿ってスライド可能に把持する把持部材１８を有し、この把持部材１８のスライドを所定位置（ワイヤ１５の先端部）で阻止するためのストッパ１９をワイヤ１５の先端側に設けている。このストッパ１９は、後述するように、ワイヤ１５に張力を付与するための重錘としての機能も有する。   The locking means 14 has a gripping member 18 that slidably grips the wire 15 along its longitudinal direction 15L, and a stopper for preventing the gripping member 18 from sliding at a predetermined position (the tip of the wire 15). 19 is provided on the distal end side of the wire 15. As will be described later, the stopper 19 also has a function as a weight for applying tension to the wire 15.

把持部材１８は、扉体１３の前縁部１３ａの一方の側端を流路１１の側壁１１ａに向かって延設して形成された突状部１３ｂから突設された一対のブラケット２０ａ，２０ｂ間に回動自在に保持された軸体１８ａと、ブラケット２０ａ，２０ｂ間において軸体１８ａにより回動自在に軸支されたカラー１８ｂと、を備えている。軸体１８ａ及びカラー１８ｂの軸心１８ｃは支承部１２の支軸１２ａと平行をなす方向（流路１１の水流方向Ｒと直交する方向）に配置されている。突状部１３ｂは、扉体１３の本体部１３ｃの横幅１３ｗよりも広く突出している。   The gripping member 18 is a pair of brackets 20 a and 20 b that protrude from a protruding portion 13 b that is formed by extending one side end of the front edge portion 13 a of the door body 13 toward the side wall 11 a of the flow path 11. A shaft body 18a is rotatably held between the brackets 20a and 20b, and a collar 18b is rotatably supported by the shaft body 18a between the brackets 20a and 20b. The shaft body 18a and the shaft center 18c of the collar 18b are disposed in a direction parallel to the support shaft 12a of the support portion 12 (a direction perpendicular to the water flow direction R of the flow path 11). The protruding portion 13b protrudes wider than the lateral width 13w of the main body portion 13c of the door body 13.

軸体１８ａ及びカラー１８ｂには、軸心１８ｃと直交する方向に沿って互いに同軸をなすワイヤ孔１８ａｈ，１８ｂｈがそれぞれ開設され、これらのワイヤ孔１８ａｈ，１８ｂｈを貫通した状態でワイヤ１５がスライド可能に挿通されている。図５に示すように、把持部材１８は、ワイヤ１５の長手方向１５Ｌに沿ってスライド可能であり、把持部材１８を貫通するワイヤ１５とともに軸心１８ｃを中心に回動可能である。   The shaft body 18a and the collar 18b are respectively provided with wire holes 18ah and 18bh that are coaxial with each other along a direction orthogonal to the shaft center 18c, and the wire 15 can slide while passing through the wire holes 18ah and 18bh. Is inserted. As shown in FIG. 5, the gripping member 18 can slide along the longitudinal direction 15 </ b> L of the wire 15, and can rotate around the axis 18 c together with the wire 15 penetrating the gripping member 18.

図１，図２に示すように、ワイヤ１５の基端部は巻上機１６のドラム２１に巻き付けられ、ドラム２１と係止手段１４との間のワイヤ１５及び係止手段１４の移動経路となる凹状部２２が流路１１の一方の側壁１１ａに形成されている。ワイヤ１５の先端部はストッパ１９によって係止手段１４に係止されているので、巻上機１６を作動させてワイヤ１５をドラム２１に巻き取っていくと、扉体１３はワイヤ１５で引っ張られて徐々に流路１１の上流側へ起立していき、図２に示すように、扉体１３の上縁部１３ａが上部戸当たり２３に当接した時点で流路１１が閉止される。逆に、巻上機１６のドラム２１からワイヤ１５を繰り出すと、扉体１３は徐々に流路１１の下流側へ倒伏していき、ほぼ水平に倒伏した状態となる。   As shown in FIGS. 1 and 2, the proximal end portion of the wire 15 is wound around the drum 21 of the hoisting machine 16, and the movement path of the wire 15 and the locking means 14 between the drum 21 and the locking means 14. A concave portion 22 is formed on one side wall 11 a of the flow path 11. Since the distal end portion of the wire 15 is locked to the locking means 14 by the stopper 19, when the winding machine 16 is operated and the wire 15 is wound around the drum 21, the door body 13 is pulled by the wire 15. As shown in FIG. 2, the flow path 11 is closed when the upper edge 13a of the door body 13 abuts against the upper door stop 23. On the contrary, when the wire 15 is fed out from the drum 21 of the hoisting machine 16, the door body 13 gradually falls down to the downstream side of the flow path 11, and is in a state of lying down almost horizontally.

ここで、図６，図７に基づいて逆流防止ゲート１０の機能について説明する。平常時は流路１１の上流側の水位が高いので、図６に示すように、逆流防止ゲート１０の扉体１３は下流側へほぼ水平に倒伏した状態にあり、水は扉体１３を乗り越えて流路１１の上流側から下流側に向かって一定方向に流れている。このとき、ワイヤ１５は、巻上機１６のドラム２１と、扉体１３の係止手段１４に係合したストッパ１９との間で直線状をなしている。   Here, the function of the backflow prevention gate 10 will be described with reference to FIGS. Since the water level on the upstream side of the flow path 11 is high in normal times, as shown in FIG. 6, the door body 13 of the backflow prevention gate 10 is in a state of lying down almost horizontally to the downstream side, and the water gets over the door body 13. Thus, the fluid flows in a certain direction from the upstream side to the downstream side of the flow path 11. At this time, the wire 15 is linear between the drum 21 of the hoisting machine 16 and the stopper 19 engaged with the locking means 14 of the door body 13.

集中豪雨などで河川が増水し、流路１１の下流側の水位が上昇すると、扉体１３は水の浮力によって上流側に起立した状態（図６中の矢線Ｘで示す状態）となる。このとき、扉体１３とともに起立する係止手段１４の把持部材１８は、ワイヤ１５の長手方向１５Ｌに沿ってその上方へスライドするとともに、扉体１３の傾斜角度に応じて軸心１８ｃを中心に反時計方向に回転し、図７に示すような状態となる。即ち、巻上機１６のドラム２１と把持部材１８との間に位置するワイヤ１５は直線状態となり、把持部材１８とストッパ１９との間に位置するワイヤ１５は、重錘を兼ねるストッパ１９の重さにより、鉛直下方へ垂下した状態に保たれる。   When the river is increased due to heavy rain and the water level on the downstream side of the flow path 11 rises, the door body 13 is erected on the upstream side due to the buoyancy of water (state indicated by the arrow X in FIG. 6). At this time, the gripping member 18 of the locking means 14 that stands up together with the door body 13 slides upward along the longitudinal direction 15L of the wire 15 and at the center of the axis 18c according to the inclination angle of the door body 13. It rotates counterclockwise and the state shown in FIG. 7 is obtained. That is, the wire 15 positioned between the drum 21 of the hoist 16 and the gripping member 18 is in a straight line state, and the wire 15 positioned between the gripping member 18 and the stopper 19 is the weight of the stopper 19 that also serves as a weight. As a result, it is maintained in a state of hanging vertically downward.

流路１１の下流側の水位がさらに上昇して、図６に示すように、扉体１３の上縁部１３ａが上部戸当たり２３に当接した状態（図６中の矢線Ｙで示す状態）となると、図７で示した場合と同様に、巻上機１６のドラム２１と把持部材１８との間に位置するワイヤ１５は直線状態となり、把持部材１８とストッパ１９との間に位置するワイヤ１５は、重錘を兼ねるストッパ１９の重さにより、鉛直下方へ垂下した状態に保たれる。   The water level on the downstream side of the flow path 11 further rises, and as shown in FIG. 6, the upper edge portion 13a of the door body 13 is in contact with the upper door stop 23 (the state indicated by the arrow Y in FIG. 6). ), The wire 15 positioned between the drum 21 of the hoist 16 and the gripping member 18 is in a straight line and is positioned between the gripping member 18 and the stopper 19 as in the case shown in FIG. The wire 15 is maintained in a state of hanging vertically downward by the weight of the stopper 19 that also serves as a weight.

図６に示すように、逆流防止ゲート１０においては、倒伏状態にある扉体１３が起立するとき係止手段１４がワイヤ１５の長手方向１５Ｌに沿ってスライドするので、ワイヤ１５の先端側が扉体１３とともに持ち上がってワイヤ１５が弛緩することがない。このため、ワイヤ１５の弛緩に起因する巻上機１６のドラム２１からのワイヤ１５の離脱を防止することができる。   As shown in FIG. 6, in the backflow prevention gate 10, the locking means 14 slides along the longitudinal direction 15 </ b> L of the wire 15 when the lying door body 13 stands, so that the distal end side of the wire 15 is the door body. The wire 15 is not lifted together with the wire 13 and relaxed. For this reason, the detachment of the wire 15 from the drum 21 of the hoisting machine 16 due to the relaxation of the wire 15 can be prevented.

また、扉体１３の起伏範囲１７内においてワイヤ１５の長手方向１５Ｌに沿ってスライド可能な係止手段１４を介して当該ワイヤ１５の先端側のストッパ１９を扉体１３に繋いだ簡素な構造であるため、施工は容易である。さらに、ワイヤ１３の先端側と扉体１３との間はスライド可能な係止手段１４で繋がれているが、巻上機１６でワイヤ１５を巻き取って扉体１３を起立させたとき、扉体１３より高く突出する部材や巻上機１６と扉体１３との間に収まらない部材などが存在しないので、天井部１１ｃを有する四方水密構造の流路１１にも設置可能である。   Further, the stopper 19 on the distal end side of the wire 15 is connected to the door body 13 via the locking means 14 that can slide along the longitudinal direction 15L of the wire 15 within the undulation range 17 of the door body 13. Therefore, construction is easy. Further, the leading end side of the wire 13 and the door body 13 are connected by a slidable locking means 14, but when the wire 15 is wound up by the hoist 16 and the door body 13 is erected, the door Since there is no member that protrudes higher than the body 13 or a member that does not fit between the hoisting machine 16 and the door body 13, it can also be installed in the flow path 11 of a four-way watertight structure having the ceiling portion 11c.

逆流防止ゲート１０においては、係止手段１４として、ワイヤ１５をスライド可能に把持する把持部材１８を設け、把持部材１８のスライドを阻止するためのストッパ１９をワイヤ１５の先端側に設けている。このため、簡素な構造でありながら、ワイヤ１５の巻き上げによる扉体１３の起伏動作に支障を与えることなく、ワイヤ１５に対する確実なスライド機能を確保することができるので、優れた弛緩防止効果を得ることができる。   In the backflow prevention gate 10, a gripping member 18 that slidably grips the wire 15 is provided as the locking means 14, and a stopper 19 for preventing the gripping member 18 from sliding is provided on the distal end side of the wire 15. For this reason, although it is a simple structure, since the reliable sliding function with respect to the wire 15 can be ensured without interfering with the raising / lowering operation | movement of the door body 13 by winding of the wire 15, the outstanding relaxation prevention effect is acquired. be able to.

また、ワイヤ１５に張力を付与するための重錘としての機能をストッパ１４に持たせたことにより、扉体１３が起伏範囲１７内のいずれの状態にあってもワイヤ１５が常に引っ張られた状態に保たれるため、安定したワイヤ１５の弛緩防止機能を発揮する。   Further, since the stopper 14 has a function as a weight for applying tension to the wire 15, the wire 15 is always pulled regardless of the state of the door body 13 in the undulation range 17. Therefore, the function of preventing the loosening of the stable wire 15 is exhibited.

本発明の逆流防止ゲートは、河川の管理施設あるいは沿岸地域の防潮施設などとして広く利用することができる。   The backflow prevention gate of the present invention can be widely used as a river management facility or a coastal tide prevention facility.

１０ 逆流防止ゲート
１１ 流路
１１ａ 側壁
１１ｂ 底部
１１ｃ 天井部
１２ 支承部
１２ａ 支軸
１３ 扉体
１３ａ 前縁部
１３ｂ 突状部
１３ｃ 本体部
１３ｗ 横幅
１４ 係止手段
１５ ワイヤ
１５Ｌ 長手方向
１６ 巻上機
１７ 起伏範囲
１８ 把持部材
１８ａ 軸体
１８ｂ カラー
１８ｃ 軸心
１９ ストッパ（重錘）
２０ａ，２０ｂ ブラケット
２１ ドラム
２２ 凹状部 DESCRIPTION OF SYMBOLS 10 Backflow prevention gate 11 Flow path 11a Side wall 11b Bottom part 11c Ceiling part 12 Bearing part 12a Support shaft 13 Door body 13a Front edge part 13b Projection part 13c Main body part 13w Width 14 Locking means 15 Wire 15L Longitudinal direction 16 Hoisting machine 17 Relief range 18 Gripping member 18a Shaft body 18b Collar 18c Shaft center 19 Stopper (weight)
20a, 20b Bracket 21 Drum 22 Concave part

Claims (3)

流路の底部に起伏可能に配置され水中で浮力を生じる扉体と、係止手段を介して先端側が前記扉体に繋がれたワイヤと、前記ワイヤの基端側を巻き取る巻き上げ装置と、を備え、前記扉体の起伏範囲内において前記係止手段が前記ワイヤの長手方向に沿ってスライド可能であることを特徴とする逆流防止ゲート。   A door body that can be raised and lowered at the bottom of the flow path and generates buoyancy in water, a wire having a distal end connected to the door body via a locking means, and a winding device that winds up the proximal end side of the wire; A backflow prevention gate, characterized in that the locking means is slidable along the longitudinal direction of the wire within the undulation range of the door body. 前記係止手段として、前記ワイヤをスライド可能に把持する把持部材を設け、前記把持部材のスライドを阻止するためのストッパを前記ワイヤの先端側に設けたことを特徴とする請求項１記載の逆流防止ゲート。   2. The backflow according to claim 1, wherein a gripping member for slidably gripping the wire is provided as the locking means, and a stopper for preventing the gripping member from sliding is provided on the distal end side of the wire. Prevention gate. 前記ストッパが、前記ワイヤに張力を付与するための重錘としての機能を有することを特徴とする請求項２記載の逆流防止ゲート。
The backflow prevention gate according to claim 2 , wherein the stopper has a function as a weight for applying tension to the wire.
JP2009253878A 2009-11-05 2009-11-05 Backflow prevention gate Active JP5393403B2 (en)

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JPS54182522U (en) * 1978-06-15 1979-12-24
JPH0338258Y2 (en) * 1985-07-10 1991-08-13
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