1284720 九、發明說明： 【發明所屬之技術領域】 本發明，係關於具備止回功能之止水閥。 【先前技術】 以往，在將配水管加以分歧之供水管設置之止水閥 中，由於未設置止回閥，因止水閥之一次側成為負壓，或 止水閥之二次側壓力變成較一次側高，致使水回流，而使 配水管側有被污染之危險。 為防止上述回流，雖已在流路中設置止回閥，但由於 需要设置止回閥之空間，裝設時為謀求與周邊機器之調 和，其裝設位置受到限制而有缺乏汛用性等之問題，故廣 泛地使用一體具備止回閥之止水閥（例如，參照專利文獻 [專利文獻1 ]日本特許第3 4 5 3 4 2 4號公報 【發明内容】 w而，上述止水閥，係單純地組合止回閥而構成，！ 於需組裝止水閥與止回閥之2個閥機構，故其構造複雜」 ’’’、可避免的大型化’亦有組裝及維修保養煩雜等課題。 本發明，有鑒於上述課題’藉由提供一種具備止回; 此之止水閥來解決上述課題，該止水㈣在連通—次側^ :=側：路之閥口之二次側設置閥座，並且在該㈣ 線丄庄的方式设置閥體’該閥體在與沿閥口之朝 、本方向進退自如的心軸之間’裝有對應心軸 與閥體之間伸縮的彈箬。 進k而此在 1284720 與閥座之間，j：匕外，止水時亦無少量漏水，故不需進行維 ”蒦’且因通過閥體之水能從一次側沿球面順暢地流動至二 次側’故能減少壓力損I’提高止水閥之性能等，其實用 效果甚大。 【實施方式】 以下，根據圖式說明本發明之一實施形態例。 圖1、2，係具備止回功能之止水閥的縱截面圖，圖夏 顯示止水狀態、圖2顯示回流·時之止水狀態。 止水閥之閥箱1係形成為γ型，亦即，連通於供水源 J入口 2之（_人側）流路3與連通於排水側出口 4之（二次 側）流路5的中心線係在—直線上，往閥口 6(連通一次側流 路3與一次側流路5)之二次侧延伸的軸線及二次側流路& 成為一銳角。 、$箱1之上°卩，沿著往閥口 6之二次側延伸之軸線形 成為大致筒形，其上端形成為開口，此開口部係以具〇型 山封圈8之盖體9加以鎖緊密封使其不透水，該蓋體9係 將沿閥口 6之軸線方向進退自如的心軸7插通支撐成不透 水。 〜 口 6之擴徑之二次側設置閥座丨〇。 在閥座10 ’將橡膠製且球狀之閥體11設置成著朋 ^。玄閥體11係、在與心軸7之間，裝S因應心軸7之達 %在與闕體11之間伸縮的彈簧12，該彈簧1 2係隨時 閥體單壓向閉間方向。 1284720 心轴7 ’係將刻設在其基端部之公 Q , 丨螺紋，鎖進刻設在筒 狀邠9a(突設於蓋體9之上中 7 ^ 内面的母螺紋，在心軸 (之基端部端面之直徑方向刻設一條 凹槽7a，將「一」字 i起子等治具之頭部插入於該凹槽，益丄 „ Ah ^ ^，藉由使其正反旋 轉，此使心軸7沿閥口 6之軸線方向進退自如。 又’於心軸7’在插通蓋體9且不具公螺紋之部位周設 1型密封槽，藉由裝設於該〇型密封槽之。型密封圈⑴吏 盍體9與插通於此之心軸7之間 。卜处不，又，在心軸7之 中途部位，向外方突設直徑大於蓋體9之心轴插通孔的凸 緣狀擒件7b，在心軸7後退結束狀態下使擋件㈣接於蓋 體9之内侧端面9b。 彈菁12,係由圓錐螺旋彈菁構成，將其直徑較小之端 部固裝於設在心轴7前端部的彈簧承接部&，直徑較大之 端部則恒抵接於閥體π。 又，彈簧12， 螺旋彈簧，或者， 該延伸端部設置用 並不限於圓錐螺旋彈簧，亦可以是圓筒 亦可將心軸7之基端形成一延伸部，在 來進行心軸7之進退操作的把手。 又，本實施例中，雖顯示γ型之閥箱i，但閥箱 之形 式不限於Y型，例如亦可以是方形 狀，亦可以是圓盤狀，此時，閥口 形狀亦形成為對應閥體11之形狀。 ，又，閥體11不限於球 6、閥座10及彈簧12之 接著，說明本發明之具備止回功能之止水閥之作用。 在圖1所示之止水狀態，藉由使心軸7往閉閥方向移 動、彈簧1 2收縮最大限度，使閥體丨丨強固地著座於閥座 1284720 1 〇以進行止水。 在此止水狀態下，藉由旋轉心軸7使其後退，使彈瞽 伸長於閥體η與心軸7之間’減弱彈簧12之彈性力(對： 體11之閉閥力），使作用於閥體u之開閥方向的—次側壓 力’勝過作用於閥體u之閉閥方向的彈簧12之彈性力邀 二次側展力’使彈簧12收縮而使閥體n從閥座1〇離開:、 水即通過閥口 6從一次側流動至二次側而能進行通水。 在打開閥體11而進行通水時，若產生回流之情形，回 用欠側塵力將變得大於-次側麼力，冑由此回流壓力 ，用於閥體U之閉閥方向的彈簧12之彈性力，使閥 直11立即著座於闕座10’防止向一次側的回流（參照圖2)。 【圖式簡單說明】 弟1圖’係顯示具備止回功能 縱截面圖。 卩力-之止水閥之止水狀態的 圖。弟2圖，係顯示回流時之止水狀態之止水闕的縱截面 【元件代表符號】 ^ 一次側流路 ’ 一次側流路1284720 IX. Description of the Invention: [Technical Field of the Invention] The present invention relates to a water stop valve having a non-return function. [Prior Art] In the conventional water stop valve in which the water distribution pipe is provided with a water supply pipe, since the check valve is not provided, the primary side of the water stop valve becomes a negative pressure, or the secondary side pressure of the water stop valve becomes It is higher than the primary side, causing the water to flow back, and there is a danger of contamination on the side of the water distribution pipe. In order to prevent the above-mentioned recirculation, a check valve is provided in the flow path. However, since it is necessary to provide a space for the check valve, it is required to be reconciled with the peripheral device during installation, and the installation position is limited and there is a lack of usability. In the case of the above-mentioned problem, the water stop valve having the check valve is widely used. For example, the above-mentioned water stop valve is described in the patent document [Patent Document 1] Japanese Patent No. 3 4 5 3 4 2 4 It is composed of a combination of a check valve, and the two valve mechanisms of the water stop valve and the check valve are required to be assembled. Therefore, the structure is complicated, and the size that can be avoided is large. It is also complicated to assemble and maintain. In view of the above problems, the present invention solves the above problems by providing a water stop valve having a check valve. The water stop (4) is connected to the secondary side: the side of the road: The valve seat is disposed on the side, and the valve body is disposed in the manner of the (four) line. The valve body is stretched between the corresponding mandrel and the valve body between the mandrel and the mandrel which is retractable in the direction of the valve port. The impeachment. Into k and this between 1284720 and the valve seat, j: 匕In addition, there is no small amount of water leakage when stopping water, so it is not necessary to carry out the dimension "蒦" and because the water passing through the valve body can smoothly flow from the primary side to the secondary side along the spherical surface, it can reduce the pressure loss I' and increase the water stop valve. [Embodiment] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 and Fig. 2 are vertical cross-sectional views of a water stop valve having a non-return function, and Fig. Fig. 2 shows the water stop state at the time of reflow and time. The valve box 1 of the water stop valve is formed in a γ type, that is, the flow path 3 connected to the inlet of the water supply source J (the human side) is connected to the drain water. The center line of the (secondary side) flow path 5 of the side outlet 4 is on the straight line, and the axis and the secondary side extending to the secondary side of the valve port 6 (connecting the primary side flow path 3 and the primary side flow path 5) The flow path & becomes an acute angle. The upper side of the box 1 is formed in a substantially cylindrical shape along an axis extending toward the secondary side of the valve port 6, and the upper end is formed as an opening, and the opening is formed in a shape The cover 9 of the mountain seal ring 8 is locked and sealed so as to be impervious to water, and the cover body 9 will advance and retreat along the axis of the valve port 6 If the mandrel 7 is inserted through the support to be impervious to water. 〜 The second side of the expansion of the port 6 is provided with a valve seat 丨〇. In the valve seat 10', the rubber-made and spherical valve body 11 is set as a friend. The valve body 11 is disposed between the mandrel 7 and the spring 12 so as to expand and contract with the body 11 in response to the % of the mandrel 7, and the spring 12 is a single pressure in the closing direction at any time. The mandrel 7' will be engraved on the base end of the male Q, 丨 thread, locked into the cylindrical 邠 9a (the female thread protruding from the inside of the cover 9), on the mandrel A groove 7a is engraved in the diameter direction of the end surface of the base end portion, and the head of the jig of the "one" i-pin is inserted into the groove, and the Ah ^ Ah ^ ^ is rotated by the forward and reverse directions. The mandrel 7 is retractable in the direction of the axis of the valve port 6. Further, a "type seal groove" is provided around the mandrel 7' at a portion where the cover 9 is inserted and which does not have a male screw, and is attached to the 密封-shaped seal groove. Type seal (1) 盍 The body 9 is interposed between the mandrel 7 and the mandrel 7 inserted therein. Further, in the middle portion of the mandrel 7, a flange-like member 7b having a diameter larger than the mandrel insertion hole of the cover body 9 is protruded outward, and the stopper (4) is connected to the mandrel 7 in the state where the mandrel 7 is retracted. The inner end surface 9b of the lid body 9. The elastic cyanine 12 is composed of a conical spiral elastic crystal, and the end portion having a small diameter is fixed to a spring receiving portion & disposed at the front end portion of the mandrel 7, and the end portion having a larger diameter is constantly abutted against the valve body π . Moreover, the spring 12, the coil spring, or the extending end portion is not limited to the conical coil spring, and the cylinder may also form an extension of the base end of the mandrel 7 to advance and retract the mandrel 7. Handle for operation. Further, in the present embodiment, the valve box i of the γ type is shown, but the form of the valve box is not limited to the Y type, and may be, for example, a square shape or a disk shape. In this case, the shape of the valve port is also formed to correspond. The shape of the valve body 11. Further, the valve body 11 is not limited to the ball 6, the valve seat 10, and the spring 12, and the function of the water stop valve having the non-return function of the present invention will be described. In the water stop state shown in Fig. 1, by moving the mandrel 7 in the valve closing direction and maximizing the spring 12, the valve body is firmly seated on the valve seat 1284720 1 〇 to stop the water. In this water stop state, by rotating the mandrel 7 to retreat, the magazine is extended between the valve body η and the mandrel 7 to weaken the elastic force of the spring 12 (to: the valve closing force of the body 11). The secondary side pressure acting on the valve opening direction of the valve body u exceeds the elastic force of the spring 12 acting on the valve closing direction of the valve body u, inviting the secondary side to spread the force to cause the spring 12 to contract and the valve body n to be from the valve The seat 1 〇 leaves: water flows through the valve port 6 from the primary side to the secondary side to allow water to pass. When the valve body 11 is opened and the water is turned on, if the backflow occurs, the returning underside dust force will become greater than the secondary side force, and thus the return pressure, the spring for the valve closing direction of the valve body U. The elastic force of 12 causes the valve straight 11 to immediately seat on the sley 10' to prevent backflow to the primary side (refer to Fig. 2). [Simple description of the drawing] The brother 1 shows a longitudinal section with a non-return function.卩力- The diagram of the water stop state of the water stop valve. 2, the vertical section of the water stop showing the water stop state at the time of reflow [component symbol] ^ primary side flow path ’ primary side flow path