JPH0439473A - Check valve - Google Patents

Check valve

Info

Publication number
JPH0439473A
JPH0439473A JP14711290A JP14711290A JPH0439473A JP H0439473 A JPH0439473 A JP H0439473A JP 14711290 A JP14711290 A JP 14711290A JP 14711290 A JP14711290 A JP 14711290A JP H0439473 A JPH0439473 A JP H0439473A
Authority
JP
Japan
Prior art keywords
valve body
valve
spring
lock rod
rod
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP14711290A
Other languages
Japanese (ja)
Other versions
JP3099345B2 (en
Inventor
Chikashi Gomi
知佳士 五味
Hiroshi Naito
宏 内藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kitz Corp
Original Assignee
Kitz Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kitz Corp filed Critical Kitz Corp
Priority to JP02147112A priority Critical patent/JP3099345B2/en
Publication of JPH0439473A publication Critical patent/JPH0439473A/en
Application granted granted Critical
Publication of JP3099345B2 publication Critical patent/JP3099345B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE:To simplify a valve structure and secure a more reliable valve closing condition by restricting a reciprocated valve unit to the valve closing position by means of a lock device actuated by one touch operation. CONSTITUTION:A lock device 2 comprises a lock lever 4 possible to reciprocate at a right angle to a direction of reciprocating a valve unit 3, spring 5 for resiliently urging the lock lever in a direction of approaching the valve unit 3 and an operating lever 6 for moving the lock lever 4 by one touch operation against or by resilient force of the spring 5, and the valve unit 3 is restricted to a closing position by stopping an internal end part 4a of the lock lever 4 to a shaft end part 3a of the valve unit 3 when the lock lever 4 approaches the valve unit 3. A cam mechanism is formed by forming a slope 4b in the internal end part 4a of the lock lever 4. Next, the operating lever 6 is flexibly connected to an external end part 4c of the lock lever 4 by a pin 7 so as to place the lock lever 4 distant from the valve unit 3, when the operating lever 6 is extended, and to stop the internal end part 4a of the lock lever 4 to the shaft end part 3a of the valve unit 3 when the lever is flexed. A protrusion 8b for limiting a rotational operating surface of the lock lever 4 is provided. Further, the valve unit 3, having a valve seat surface 3c of elastic material, is resiliently urged in a closing direction by a coil spring 9. In this way, a check function at reverse flow time can be more surely maintained, and a valve can be operated in a very short time with operation facilitated.

Description

【発明の詳細な説明】[Detailed description of the invention]

災匪座1孜 Kaiseiza 1 Kei

【産業上の利用分野】[Industrial application field]

本発明は、冷温水、空気、ガスなどの配管に装着して逆
流を防止する逆止弁に関するものであり、特に、ロック
装置を装備し、これをワンタッチ操作で作動させて、弁
体を閉弁位置に拘束させることができる逆止機能と開閉
機能とを兼備した逆止弁に関するものである。
The present invention relates to a check valve that is attached to piping for hot and cold water, air, gas, etc. to prevent backflow.In particular, the present invention is equipped with a locking device that can be activated with a single touch to close the valve body. The present invention relates to a check valve that has both a check function that allows the valve to be restrained in its position and an opening/closing function.

【従来の技術】[Conventional technology]

一般に多く用いられている逆止弁は、逆流を閉止する逆
止機能だけを有し、正流を阻止する開閉機能を有してい
ない。このため、多くの場合、逆止弁に仕切弁などの開
閉弁を併設するのが一般であった。 特殊なバルブとして、ねじ締め逆止弁と呼ばれる。玉形
弁の弁体と弁体との接続を開放して弁体をリフト逆止弁
の弁体のように機能させるものがあった。
Check valves that are commonly used have only a check function to close back flow, and do not have an opening/closing function to block forward flow. For this reason, in many cases, it has been common to provide an on-off valve such as a gate valve in conjunction with the check valve. A special type of valve is called a screw-on check valve. There is a globe valve that releases the connection between the valve bodies and allows the valve bodies to function like the valve bodies of a lift check valve.

【発明が解決しようとする課題】[Problem to be solved by the invention]

本発明は、上記の従来の技術が有する次の課題を解決し
ようとするものである。 即ち、逆止弁に仕切弁などの開閉弁を併設することは、
配管コストが高く、広い配管空間を必要とする課題を有
している。 更に、仕切弁などの開閉弁は、バルブを開閉するのに手
間取り、特に、逆流が発生して逆止弁が作動した時に急
いで閉弁することが困難であるという課題を有している
。 また、ねじ締め逆止弁は、上記の開閉弁と同様に、バル
ブを開閉するのに手間取り、特に、逆流が発生して逆止
弁が作動した時に急いで閉弁することが困難であるとい
う課題を有している。 更に、ねじ締め逆止弁は、構造がやや複雑で大型であり
、コスト高である。 発明の構成
The present invention aims to solve the following problems that the above-mentioned conventional techniques have. In other words, installing an on-off valve such as a gate valve in addition to a check valve is
The problem is that piping costs are high and a large piping space is required. Furthermore, on-off valves such as gate valves have the problem that it takes time to open and close the valve, and in particular, it is difficult to quickly close the valve when backflow occurs and the check valve is activated. In addition, like the above-mentioned on-off valves, screw-on check valves take time to open and close, and in particular, it is difficult to quickly close them when backflow occurs and the check valve is activated. I have issues. Furthermore, the screw-fastened check valve has a somewhat complicated structure, is large, and is expensive. Composition of the invention

【課題を解決するための手段】[Means to solve the problem]

本発明は、上記の目的を達成するため、次のように構成
した。 即ち、往復動する弁体を、ワンタッチ操作で作動するロ
ック装置によって閉弁位置に拘束して逆止機能を失わせ
、また、該ロック装置による該弁体の拘束を解除して、
該弁体の逆止機能を回復させるようにした。 この場合、該ロック装置は、該弁体の往復動の方向に直
角に往復動が可能なロック桿と、該ロック桿を該弁体に
近づける方向に弾発するばねと、該ロック桿を該ばねの
弾発力に抗して該弁体から遠ざけたり、該ばねの弾発力
によって該弁体に近づくことを可能にさせたりする操作
桿とからなり、該ロック桿が該ばねの弾発力によって該
弁体に近づいた時に、該ロック桿の内端部が該弁体の軸
端部に係止して、該弁体を閉弁位置に拘束するようにす
るとよい。 また、該ロック桿の内端部と該弁体の軸端部とが、該ロ
ック桿が該ばねの弾発力により該弁体へ近づく運動を該
弁体が閉弁する運動に変換するカム機構を形成している
とよく、該操作桿は該ロック桿の外端部にピンで屈伸自
在に接続されており、該操作桿の長手方向を該ロック桿
と同方向に伸長した時に、該操作桿の該ピンから遠い距
離の外縁部がバルブ本体の外面に当接して該ロック桿を
該ばねの弾発力に抗して該弁体から遠ざけ、該操作桿の
長手方向を該ロック桿に直角になるように屈曲した時に
、該操作桿の該ピンから近い距離の外縁部が該バルブ本
体の外面に対面して、該ばねの弾発力によって該ロック
桿の内端部が該弁体の軸端部に係止するようにするとよ
く、更に、該バルブ本体の該外面に該ロック桿の屈伸操
作を該弁体と該ロック桿とを含む平面内に限定する突起
を設けたり、該ロック桿が該バルブ本体に接触摺動する
部分を非回転の嵌合にしたりするとよい。 更にまた、該弁体がゴム等の弾性体からなる弁座面を有
し、コイルはねによって閉弁方向に弾発されているとよ
く、該弁体が該バルブ本体に接触摺動する部分を非回転
の嵌合にするとよい。
In order to achieve the above object, the present invention is configured as follows. That is, the reciprocating valve body is restrained in the closed position by a locking device activated by a one-touch operation, thereby losing the check function, and the restraint of the valve body by the locking device is released.
The check function of the valve body is restored. In this case, the locking device includes a locking rod capable of reciprocating at right angles to the direction of reciprocating movement of the valve body, a spring that springs the locking rod in a direction to bring the locking rod closer to the valve body, and a spring that moves the locking rod toward the valve body. and an operating rod that moves away from the valve body against the elastic force of the spring, or allows it to approach the valve body by resisting the elastic force of the spring, and the lock rod resists the elastic force of the spring. When the valve body is approached by the valve body, the inner end of the lock rod is preferably engaged with the shaft end of the valve body, thereby restraining the valve body in the closed position. Further, the inner end of the lock rod and the shaft end of the valve body are configured as a cam that converts the movement of the lock rod approaching the valve body due to the elastic force of the spring into the movement of the valve body to close the valve. The operation stick is connected to the outer end of the lock stick in a flexible manner with a pin, and when the operation stick is extended in the same direction as the lock stick, the The outer edge of the operating rod that is far from the pin comes into contact with the outer surface of the valve body to move the locking rod away from the valve body against the elastic force of the spring, and the longitudinal direction of the operating rod is moved toward the locking rod. When the operating rod is bent at right angles to the pin, the outer edge of the operating rod at a distance close to the pin faces the outer surface of the valve body, and the inner end of the lock rod is bent due to the elastic force of the spring. It is preferable that the valve body is locked to the shaft end of the valve body, and further, a protrusion is provided on the outer surface of the valve body to limit the bending/extending operation of the lock rod to a plane including the valve body and the lock rod; It is preferable that the portion where the lock rod contacts and slides on the valve body be non-rotatably fitted. Furthermore, it is preferable that the valve body has a valve seat surface made of an elastic body such as rubber, and is urged in the valve closing direction by a coil spring, and a portion where the valve body contacts and slides on the valve body. It is better to have a non-rotating fit.

【作 用】[For use]

本発明の逆止弁は、上記のように構成したので、次のよ
うに作用する。 操作桿の長手方向をロック桿と同方向にし、操作桿のピ
ンから遠い距離の外縁部をバルブ本体の外面に当接させ
、ロック桿をばねの弾発力に抗して弁体から遠ざけであ
ると、弁体は流体の正流によってコイルばねに抗して開
弁方向に移動し、流体が流れる。 流体の流れが止まるか逆流になろうとする時に、弁体は
コイルばねの弾発力によって閉弁位置になり、流体の逆
流が防止される。 この状態で、操作桿をワンタッチ操作して長い方向をロ
ック桿に直角になるように屈曲すると、操作桿のピンか
ら近い距離の外縁部がバルブ本体の外面に対面するよう
になり、ロック桿がばねの弾発力で移動して弁体に近づ
き、ロック桿の内端部が弁体の軸端部に係止して弁体を
閉弁位置に拘束する。このため、流体が正流になるよう
な圧力状態になっても、流体が弁体を押して流れること
がない。 操作桿を操作して長手方向をロック桿と同方向になるよ
うにすると、ロック桿はばねの弾発力に抗して弁体から
遠ざかって弁体の拘束を解除するので、弁体は流体の正
流によって開弁じ、流体の逆流によって閉弁する逆止機
能を回復する。 なお、ロック桿の内端部と弁体の軸端部とが、ロック桿
がばねの弾発力により弁体へ近づく運動を弁体が開弁す
る運動に変換するカム機構を形成しているので、ばねの
弾発力によって弁体を閉弁方向に押し続けており、ロッ
ク桿の内端部と弁体の軸端部とが係止している部分が摩
耗したりしても、弁体は確実に閉弁している。また、弁
体の弁座面はゴム等の弾性体によって形成され、弁体は
コイルばねによっても閉弁方向に押されているので、閉
弁状態を一層確実なものにしている。 また、バルブ本体の外面にロック桿の屈伸操作を弁体と
ロック桿を含む平面内に限定する突起を設けたり、ロッ
ク桿がバルブ本体に接触摺動する部分を非回転の嵌合に
したりすると、ロック桿は軸線方向に移動するだけで回
転しないので、ロック桿の内端部の弁体の軸端部に係止
する位置が変わることがなく、特に、この部分がカム形
状に形成されている場合には、カム作用を確実に維持す
ることができる。 また、弁体がバルブ本体に接触する部分を非回転の嵌合
にすると、弁体は軸線方向に移動するだけで回転しない
ので、弁体の軸端部のロック桿の内端部に係止する位置
が変わることがなく、特に、この部分がカム形状に形成
されている場合には、カム作用を確実に維持することが
できる。
Since the check valve of the present invention is constructed as described above, it operates as follows. The longitudinal direction of the operation stick should be in the same direction as the lock stick, and the outer edge of the operation stick farthest from the pin should be in contact with the outer surface of the valve body, so that the lock stick can be moved away from the valve body against the elastic force of the spring. If so, the valve body moves in the valve opening direction against the coil spring due to the forward flow of the fluid, and the fluid flows. When the flow of fluid is about to stop or reverse, the valve body is brought to the closed position by the elastic force of the coil spring, thereby preventing the fluid from flowing back. In this state, if you operate the control stick with one touch and bend the long direction so that it is perpendicular to the lock stick, the outer edge of the control stick at a distance from the pin will face the outer surface of the valve body, and the lock stick will open. The lock rod is moved by the elastic force of the spring and approaches the valve body, and the inner end of the locking rod engages the shaft end of the valve body to restrain the valve body in the closed position. Therefore, even if the pressure is such that the fluid flows forward, the fluid will not push the valve body and flow. When the operating rod is operated so that its longitudinal direction is in the same direction as the lock rod, the lock rod moves away from the valve body against the elastic force of the spring, releasing the restriction of the valve body, so that the valve body is free from fluid. It restores the check function of opening the valve with the forward flow of fluid and closing it with the reverse flow of fluid. Note that the inner end of the lock rod and the shaft end of the valve body form a cam mechanism that converts the movement of the lock rod approaching the valve body due to the elastic force of the spring into the movement of the valve body to open the valve. Therefore, the elastic force of the spring continues to push the valve body in the valve closing direction, and even if the part where the inner end of the lock rod and the shaft end of the valve body are engaged wears out, the valve will not close. The body is definitely closed. Further, the valve seat surface of the valve body is formed of an elastic body such as rubber, and the valve body is also pushed in the valve closing direction by a coil spring, thereby making the valve closed state even more reliable. In addition, by providing a protrusion on the outer surface of the valve body that limits the bending/extending operation of the lock rod within a plane that includes the valve body and the lock rod, or by making the portion where the lock rod contacts and slides on the valve body a non-rotating fit. Since the lock rod only moves in the axial direction and does not rotate, the position at which the inner end of the lock rod engages with the shaft end of the valve body does not change, especially if this part is formed in a cam shape. If there is, the cam action can be reliably maintained. In addition, if the part where the valve body contacts the valve body is fitted in a non-rotating manner, the valve body will only move in the axial direction and will not rotate, so it will be locked to the inner end of the locking rod at the end of the shaft of the valve body. The position of the cam does not change, and the cam action can be reliably maintained, especially if this part is formed in a cam shape.

【実施例】【Example】

以下に、本発明の逆止弁を実施例に基づいて説明する。 第1図は、本発明の逆止弁の一実施例を示す縦断面であ
って、ロック装置によって弁体を閉弁位置に拘束した状
態を示しており、第2図は、第1図の部分平面図であり
、第3図は、第1図の状態からロック装置を操作して弁
体の拘束を解除し、流体によって開弁状態になった状態
を示す縦断面図である。 第1図乃至第3図において、1は逆止弁、2はロック装
置、3は弁体であって、往復動する弁体3は、ワンタッ
チ操作で作動するロック装置2によって、第1図に示し
たように閉弁位置に拘束されて逆止機能を失い、また、
第3図に示したようにロック装置2による拘束が解除さ
れて逆止機能を回復するようになっている。 4はロック桿、5はばね、6は操作桿であって、ロック
装置2は、弁体3の往復動の方向に直角に往復動が可能
なロック桿4と、ロック桿4を弁体3に近づける方向に
弾発するばね5と、ロック桿4をばね5の弾発力に抗し
て弁体3がら遠ざけたり、ばね5の弾発力によって弁体
3に近づくことを可能にさせたりすることを、ワンタッ
チで行なう操作桿6とからなっており、ロック桿4がば
ね5の弾発力によって弁体3に近づいた時に、第1図に
示したように、ロック桿4の内端部4aが弁体3の軸端
部3aに係止して、弁体3を閉弁位置に拘束するように
なっている。また、ロック桿4の内端部4aと弁体3の
軸端部3aとは、ロック桿4がばね5の弾発力によって
弁体3に近づく運動を、弁体3が閉弁する運動に変換す
るように、内端部4aに斜面4bを形成して、カム機構
を形成している。なお、第4図は、このカム機構の他の
実施例を示した部分側面図であって、内端部4aに斜面
4bを形成すると共に、軸端部3aにも斜面3bが形成
しである。 次に、操作桿6はピン7でロック桿4の外端部4cに屈
伸自在に接続されており、第3図に示したように、操作
桿6の長手方向A−Aをロック桿4と同方向に伸長した
時に、操作桿6のピン7から遠い距離の外縁部6aがバ
ルブ本体8の外面8aに当接して、ロック桿4をばね5
の弾発力に抗して弁体3から遠ざけ、第1図に示したよ
うに。 操作桿6の長手方向A−Aをロック桿4に直角になるよ
うに屈曲した時に、操作桿6のピン7から近い距離の外
縁部6bがバルブ本体8の外面8aに対面して、ばね5
の弾発力によってロック桿4の内端部4aが弁体3の軸
端部3aに係止するようになっている。 また、バルブ本体8の外面8aには、ロック桿4の回転
操作を、弁体3とロック桿4とを含む平面、即ち第1図
及び第3図が示す断面に限定するための突起8bが設け
である。なお、この突起8bを設ける代わりに、ロック
桿4がバルブ本体8に接触摺動する部分、例えば第1図
及び第3図の鍔4dと六8cを多角形やキー付きのよう
な非回転の嵌合にしてもよい。 更に、弁体3はゴム等の弾性体からなる弁座面3cを有
しており、コイルばね9によって閉弁方向に弾発されて
いる。なお、第4図に示したように軸端部3aに斜面3
bが形成しであるなどして、弁体3が回転すると不都合
を生ずる場合には、弁体3がバルブ本体8に接触摺動す
る部分1例えば第1図及び第3図の軸部3d及びガイド
穴8dを多角形やキー付きのような非回転の嵌合にする
とよい。 次に、第1図乃至第4図に示した実施例に基づいて、そ
の作用を説明する。 第3図に示したように、操作桿6の長手方向A−Aをロ
ック桿4と同方向にし、操作桿6のピン7から遠い距離
の外縁部6aをバルブ本体8の外面8aに当接させ、ロ
ック桿4をばね5の弾発力に抗して弁体3から遠ざけで
あると、弁体3は流体の正流、図に矢で示した方向の流
れによって、コイルばね9に抗して図のように開弁方向
に移動し流体が流れる。 流体の流れが止まるか、図に矢で示した方向とは反対の
逆流になろうとする時に、弁体3はコイルばね9の弾発
力によって閉弁位置になって、逆流が防止される。 この状態で、操作桿6をワンタッチ操作して、第1図に
示したように、長手方向A−Aをロック桿4に直角にな
るように屈曲すると、操作桿6のピン7から近い距離の
外縁部6bがバルブ本体8の外面8aに対面するように
なり、ロック桿4がばね5の弾発力で移動して弁体3に
近づき、ロック桿4の内端部4aが弁体3の軸端部3a
に係止して、弁体3を閉弁位置に拘束する。このため。 流体が正流になるような圧力状態になっても、流体が弁
体3を押して流れることがない。 操作桿6を操作して、第3図に示したように、長手方向
A−Aをロック桿4と同方向になるようにすると、ロッ
ク桿4はばね5の弾発力によって弁体3から遠ざかって
、弁体3の拘束を解除するので、弁体3は流体の正流に
よって開弁じ、流体の逆流によって閉弁する逆止機能を
回復する。 なお、ロック桿4の内端部4aと弁体3の軸端部3aと
が、ロック桿4がばね5の弾発力により弁体3に近づく
運動を、弁体3が開弁する運動に変換するカム機構を、
内端部4aに斜面4bを設けて形成しであるので、ばね
5の弾発力によって弁体3を閉弁方向に押し続けており
、ロック桿4の内端部4aと弁体3の軸端部3aとが係
止している部分が摩耗したりしても、弁体3は確実に閉
弁している。また、弁体3の弁座面3cはゴム等の弾性
体によって形成され、弁体3はコイルばね9によって閉
弁方向に押されているので、閉弁状態を一層確実なもの
にしている。 また、バルブ本体8の外面8aにロック桿4の回転操作
を弁体3とロック桿4とを含む平面、即ち第1図及び第
3図が示す断面内に限定する突起8bを設けたり、ロッ
ク桿4がバルブ本体8に接触摺動する部分1例えば第1
図及び第3図の鍔4dと六8cを多角形やキー付きのよ
うな非回転の嵌合にしたりすると、ロック桿4は軸線方
向に移動するだけで回転しないので、ロック桿4の内端
部4aに係止する位置が変わることがなく、特に、この
部分が第1図及び第3図又は第4図に示したようにカム
形状に形成されていると、カム作用を確実に維持するこ
とができる。 また、弁体3がバルブ本体8に接触する部分、例えば第
1図及び第3図の軸部3d及びガイド穴8dを多角形や
キー付きの非回転の嵌合にすると、弁体3が軸線方向に
移動するだけで回転しないので、軸端部3aの内端部4
aに係止する位置が変わるごとがなく、特に、この部分
が第4図に示したようにカム形状に形成されている場合
には、カム作用を確実に維持することができる。 発明の効果 以上のことから明らかなように、本発明によると、次の
ような優れた効果を奏する。 (1)1つのバルブで逆止機能と、開閉機能とを併せ持
っている。 (2)逆止機能だけを持っ逆止弁として使用することが
できる。 (3)逆流時の逆止機能を一層確実に維持することがで
き、正流状態になっても閉弁状態を維持することができ
る。 (4)ロック操作又は開閉操作をワンタッチ操作で行な
うことができ、操作が容易であり、極めて短時間に操作
することができる。 (5)ロック装置で弁体を拘束する構造が簡単で、かつ
確実である。 (6)弁座やロック装置に摩耗が生じても、ロック機能
に影響がない。 (7)構造が簡単で、低コストである。 (8)配管に逆止機能と閉止機能とを与えるのに、配管
コストが低く配管空間が小さくてよい。
EMBODIMENT OF THE INVENTION Below, the check valve of this invention is demonstrated based on an Example. FIG. 1 is a longitudinal section showing an embodiment of the check valve of the present invention, showing a state in which the valve body is restrained in the closed position by a locking device, and FIG. 3 is a partial plan view, and FIG. 3 is a vertical sectional view showing a state in which the locking device is operated from the state shown in FIG. 1 to release the restriction of the valve body, and the valve is opened by fluid. In FIGS. 1 to 3, 1 is a check valve, 2 is a locking device, and 3 is a valve body. As shown, the valve is restricted to the closed position and loses its check function, and
As shown in FIG. 3, the restraint by the lock device 2 is released and the non-return function is restored. 4 is a lock rod, 5 is a spring, and 6 is an operating rod. The spring 5 springs toward the valve body 3 and moves the lock rod 4 away from the valve body 3 against the spring force of the spring 5, or allows the lock rod 4 to move closer to the valve body 3 by the spring force of the spring 5. When the lock rod 4 approaches the valve body 3 due to the elastic force of the spring 5, the inner end of the lock rod 4 is activated as shown in FIG. 4a is engaged with the shaft end 3a of the valve body 3 to restrain the valve body 3 in the closed position. In addition, the inner end 4a of the lock rod 4 and the shaft end 3a of the valve body 3 are arranged so that the movement of the lock rod 4 approaching the valve body 3 due to the elastic force of the spring 5 is controlled by the movement of the valve body 3 to close the valve. A slope 4b is formed on the inner end 4a to form a cam mechanism. FIG. 4 is a partial side view showing another embodiment of this cam mechanism, in which a slope 4b is formed on the inner end 4a, and a slope 3b is also formed on the shaft end 3a. . Next, the operation rod 6 is connected to the outer end 4c of the lock rod 4 with a pin 7 in a flexible manner, and as shown in FIG. When extended in the same direction, the outer edge 6a of the operation rod 6 at a distance from the pin 7 comes into contact with the outer surface 8a of the valve body 8, and the lock rod 4 is pulled into the spring 5.
as shown in FIG. 1. When the operating rod 6 is bent in the longitudinal direction A-A to be perpendicular to the lock rod 4, the outer edge 6b of the operating rod 6 at a short distance from the pin 7 faces the outer surface 8a of the valve body 8, and the spring 5
The inner end 4a of the lock rod 4 is engaged with the shaft end 3a of the valve body 3 by the resilient force. Further, on the outer surface 8a of the valve body 8, there is a protrusion 8b for limiting the rotational operation of the lock rod 4 to a plane including the valve body 3 and the lock rod 4, that is, a cross section shown in FIGS. 1 and 3. It is a provision. In addition, instead of providing this protrusion 8b, the parts where the lock rod 4 contacts and slides on the valve body 8, for example, the collars 4d and 68c in FIGS. It may be fitted. Further, the valve body 3 has a valve seat surface 3c made of an elastic material such as rubber, and is urged in the valve closing direction by a coil spring 9. In addition, as shown in FIG. 4, there is a slope 3 on the shaft end 3a.
If the rotation of the valve body 3 causes a problem, such as when the valve body 3 is formed so that the portion 1 where the valve body 3 slides in contact with the valve body 8, for example, the shaft portion 3d and the shaft portion 3d in FIGS. It is preferable to make the guide hole 8d a non-rotating fit such as a polygonal shape or a keyed shape. Next, the operation will be explained based on the embodiment shown in FIGS. 1 to 4. As shown in FIG. 3, the longitudinal direction A-A of the operating rod 6 is in the same direction as the lock rod 4, and the outer edge 6a of the operating rod 6 at a far distance from the pin 7 is brought into contact with the outer surface 8a of the valve body 8. When the lock rod 4 is moved away from the valve body 3 against the elastic force of the spring 5, the valve body 3 resists the coil spring 9 due to the normal flow of fluid, the flow in the direction shown by the arrow in the figure. Then, the valve moves in the valve opening direction as shown in the figure, and fluid flows. When the flow of fluid stops or is about to flow backward in the direction opposite to the direction shown by the arrow in the figure, the valve body 3 is brought to the closed position by the elastic force of the coil spring 9, thereby preventing backflow. In this state, by one-touch operation of the operation stick 6 and bending the longitudinal direction A-A to be perpendicular to the lock stick 4 as shown in FIG. The outer edge 6b comes to face the outer surface 8a of the valve body 8, the lock rod 4 moves by the elastic force of the spring 5 and approaches the valve body 3, and the inner end 4a of the lock rod 4 comes to face the outer surface 8a of the valve body 3. Shaft end 3a
The valve body 3 is locked in the closed position. For this reason. Even if the pressure is such that the fluid flows forward, the fluid will not push the valve body 3 and flow. When the operating rod 6 is operated so that the longitudinal direction A-A is in the same direction as the lock rod 4, as shown in FIG. Since the valve body 3 is moved away and the restriction of the valve body 3 is released, the valve body 3 restores the check function of opening due to the forward flow of fluid and closing the valve due to the reverse flow of fluid. Note that the inner end 4a of the lock rod 4 and the shaft end 3a of the valve body 3 convert the movement of the lock rod 4 toward the valve body 3 due to the elastic force of the spring 5 into the movement of the valve body 3 to open the valve. The cam mechanism to convert
Since the inner end 4a is formed with a slope 4b, the elastic force of the spring 5 continues to push the valve body 3 in the valve closing direction, and the inner end 4a of the lock rod 4 and the axis of the valve body 3 Even if the portion where the end portion 3a is engaged is worn out, the valve body 3 remains reliably closed. Further, the valve seat surface 3c of the valve body 3 is formed of an elastic body such as rubber, and the valve body 3 is pushed in the valve closing direction by the coil spring 9, thereby making the valve closed state even more reliable. In addition, a protrusion 8b is provided on the outer surface 8a of the valve body 8 to limit the rotational operation of the lock rod 4 to a plane including the valve body 3 and the lock rod 4, that is, within the cross section shown in FIGS. 1 and 3. The part 1 where the rod 4 contacts and slides on the valve body 8, for example, the first
If the collars 4d and 68c in Figures 4 and 3 are non-rotating, such as polygonal or keyed, the lock rod 4 only moves in the axial direction and does not rotate, so the inner end of the lock rod 4 The position of locking on the portion 4a does not change, and in particular, if this portion is formed in a cam shape as shown in FIGS. 1 and 3 or 4, the cam action is reliably maintained. be able to. Further, if the portion where the valve body 3 contacts the valve body 8, for example, the shaft portion 3d and the guide hole 8d in FIGS. Since it only moves in the direction and does not rotate, the inner end 4 of the shaft end 3a
The position of locking on a does not change every time, and especially when this portion is formed into a cam shape as shown in FIG. 4, the cam action can be maintained reliably. Effects of the Invention As is clear from the above, the present invention provides the following excellent effects. (1) One valve has both check function and opening/closing function. (2) It has only a check function and can be used as a check valve. (3) The check function during backflow can be maintained even more reliably, and the valve can be kept closed even when the flow is in the normal flow state. (4) The locking operation or the opening/closing operation can be performed with one-touch operation, and the operation is easy and can be performed in an extremely short time. (5) The structure for restraining the valve body with the locking device is simple and reliable. (6) Even if the valve seat or locking device wears out, the locking function will not be affected. (7) Simple structure and low cost. (8) In order to provide the piping with a check function and a closing function, the piping cost is low and the piping space is small.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の逆止弁の一実施例のロック装置が作用
している状態を示す縦断面図であり、第2図は第1図の
部分平面図であり、第3図は第1図のロック装置が作用
していない状態を示す縦断面図である。 また、第4図はカム機構の他の実施例を示す部分側面図
である。 8a・・・外面 9・・・コイルばね 8b・・・突起
FIG. 1 is a longitudinal cross-sectional view showing a state in which a locking device of an embodiment of the check valve of the present invention is in operation, FIG. 2 is a partial plan view of FIG. 1, and FIG. 3 is a partial plan view of FIG. FIG. 2 is a longitudinal cross-sectional view showing a state in which the locking device of FIG. 1 is not in operation. Moreover, FIG. 4 is a partial side view showing another embodiment of the cam mechanism. 8a...Outer surface 9...Coil spring 8b...Protrusion

Claims (8)

【特許請求の範囲】[Claims] (1)往復動する弁体を、ワンタッチ操作で作動するロ
ック装置によって閉弁位置に拘束して逆上機能を失わせ
、また、該ロック装置による該弁体の拘束を解除して、
該弁体の逆止機能を回復させるようにしたことを特徴と
する逆止弁。
(1) The reciprocating valve body is restrained in the closed position by a locking device that is activated by a one-touch operation to lose the reverse function, and the restraint of the valve body by the locking device is released,
A check valve characterized in that the check function of the valve body is restored.
(2)該ロック装置は、該弁体の往復動の方向に直角に
往復動が可能なロック桿と、該ロック桿を該弁体に近づ
ける方向に弾発するばねと、該ロック桿を該ばねの弾発
力に抗して該弁体から遠ざけたり、該ばねの弾発力によ
って該弁体に近づくことを可能にさせたりする操作桿と
からなり、該ロック桿が該ばねの弾発力によって該弁体
に近づいた時に、該ロック桿の内端部が該弁体の軸端部
に係止して、該弁体を閉弁位置に拘束するようにした請
求項1記載の逆止弁。
(2) The locking device includes a locking rod capable of reciprocating at right angles to the direction of reciprocating movement of the valve body, a spring that springs the locking rod in a direction toward the valve body, and a spring that moves the locking rod toward the valve body. and an operating rod that moves away from the valve body against the elastic force of the spring, or allows it to approach the valve body by resisting the elastic force of the spring, and the lock rod resists the elastic force of the spring. 2. The non-return check according to claim 1, wherein when the valve body is approached by the valve body, the inner end of the lock rod is locked to the shaft end of the valve body to restrain the valve body in the closed position. valve.
(3)該ロック桿の内端部と該弁体の軸端部とが、該ロ
ック桿が該ばねの弾発力により該弁体へ近づく運動を該
弁体が閉弁する運動に変換するカム機構を形成している
請求項1又は2記載の逆止弁。
(3) The inner end of the lock rod and the shaft end of the valve body convert the movement of the lock rod approaching the valve body due to the elastic force of the spring into the movement of the valve body to close the valve. The check valve according to claim 1 or 2, forming a cam mechanism.
(4)該操作桿は該ロック桿の外端部にピンで屈伸自在
に接続されており、該操作桿の長手方向を該ロック桿と
同方向に伸長した時に、該操作桿の該ピンから遠い距離
の外縁部がバルブ本体の外面に当接して該ロック桿を該
ばねの弾発力に抗して該弁体から遠ざけ、該操作桿の長
手方向を該ロック桿に直角になるように屈曲した時に、
該操作桿の該ピンから近い距離の外縁部が該バルブ本体
の外面に対面して、該ばねの弾発力によって該ロック桿
の内端部が該弁体の軸端部に係止するようにした請求項
1乃至3記載の逆止弁。
(4) The operating stick is connected to the outer end of the locking stick in a flexible manner with a pin, and when the longitudinal direction of the operating stick is extended in the same direction as the locking stick, the operating stick is connected to the outer end of the locking stick with a pin. The outer edge at a far distance abuts the outer surface of the valve body to move the lock rod away from the valve body against the elastic force of the spring, so that the longitudinal direction of the operating rod is perpendicular to the lock rod. When bent,
The outer edge of the operating rod at a distance close to the pin faces the outer surface of the valve body, and the inner end of the lock rod is locked to the shaft end of the valve body by the elastic force of the spring. The check valve according to any one of claims 1 to 3, wherein the check valve is made of:
(5)該バルブ本体の該外面に該ロック桿の屈伸操作を
該弁体と該ロック桿とを含む平面内に限定する突起を設
けた請求項1乃至4記載の逆止弁。
(5) The check valve according to any one of claims 1 to 4, wherein the outer surface of the valve body is provided with a protrusion that limits the bending/extending operation of the lock rod within a plane containing the valve body and the lock rod.
(6)該ロック桿が該バルブ本体に接触摺動する部分を
非回転の嵌合にした請求項1乃至4記載の逆止弁。
(6) The check valve according to any one of claims 1 to 4, wherein the portion of the lock rod that contacts and slides on the valve body is non-rotatably fitted.
(7)該弁体がゴム等の弾性体からなる弁座面を有し、
コイルばねによって閉弁方向に弾発されている請求項1
乃至6記載の逆止弁。
(7) the valve body has a valve seat surface made of an elastic body such as rubber;
Claim 1: The valve is urged in the valve closing direction by a coil spring.
7. The check valve according to 6.
(8)該弁体が該バルブ本体に接触摺動する部分を非回
転の嵌合にした請求項1乃至7記載の逆止弁。
(8) The check valve according to any one of claims 1 to 7, wherein the portion of the valve body that contacts and slides on the valve body is non-rotatably fitted.
JP02147112A 1990-06-05 1990-06-05 Check valve Expired - Fee Related JP3099345B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP02147112A JP3099345B2 (en) 1990-06-05 1990-06-05 Check valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP02147112A JP3099345B2 (en) 1990-06-05 1990-06-05 Check valve

Publications (2)

Publication Number Publication Date
JPH0439473A true JPH0439473A (en) 1992-02-10
JP3099345B2 JP3099345B2 (en) 2000-10-16

Family

ID=15422799

Family Applications (1)

Application Number Title Priority Date Filing Date
JP02147112A Expired - Fee Related JP3099345B2 (en) 1990-06-05 1990-06-05 Check valve

Country Status (1)

Country Link
JP (1) JP3099345B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008180271A (en) * 2007-01-24 2008-08-07 Kurimoto Shoji Kk Check valve unit
JP2010138998A (en) * 2008-12-11 2010-06-24 Toho Kasei Kk Valve
JP2012102779A (en) * 2010-11-09 2012-05-31 Ebara Corp Check valve with orifice
CN107559466A (en) * 2017-08-17 2018-01-09 张家港保税区贤德国际贸易有限公司 A kind of anti-backflow valve pipe fitting

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008180271A (en) * 2007-01-24 2008-08-07 Kurimoto Shoji Kk Check valve unit
JP2010138998A (en) * 2008-12-11 2010-06-24 Toho Kasei Kk Valve
JP2012102779A (en) * 2010-11-09 2012-05-31 Ebara Corp Check valve with orifice
CN107559466A (en) * 2017-08-17 2018-01-09 张家港保税区贤德国际贸易有限公司 A kind of anti-backflow valve pipe fitting

Also Published As

Publication number Publication date
JP3099345B2 (en) 2000-10-16

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