JP2001074187A - Pipe joint - Google Patents
Pipe jointInfo
- Publication number
- JP2001074187A JP2001074187A JP24951999A JP24951999A JP2001074187A JP 2001074187 A JP2001074187 A JP 2001074187A JP 24951999 A JP24951999 A JP 24951999A JP 24951999 A JP24951999 A JP 24951999A JP 2001074187 A JP2001074187 A JP 2001074187A
- Authority
- JP
- Japan
- Prior art keywords
- valve body
- valve element
- communication hole
- valve
- auxiliary valve
- 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
Links
Landscapes
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、高圧流体を通す配
管または高圧用ホースを接続するのに好適なプラグとソ
ケットとを備える管継手に関し、特に、ソケットとプラ
グの流体通路に弁体がそれぞれ内蔵されており、非接続
状態ではそれぞれの弁体が流体通路に設けた弁座にスプ
リングの弾発力で当接して流体通路を閉じ、接続時にそ
れぞれの弁体が互いに押し合い弁座から離反して流体通
路を開く形成の管継手に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint having a plug and a socket suitable for connecting a pipe or a high-pressure hose through which a high-pressure fluid passes, and in particular, a valve body is provided in a fluid passage of the socket and the plug. In the unconnected state, each valve body abuts on the valve seat provided in the fluid passage with the resilience of a spring to close the fluid passage, and at the time of connection, each valve body pushes each other and separates from the valve seat. To open a fluid passage.
【０００２】[0002]
【従来の技術】従来、この種の管継手として、例えば、
特公昭５９−３２７１１号公報に開示されたものがあ
る。この従来の管継手は、プラグ（同公報ではニップル
と記載されている。）とソケット（同じくカプラーと記
載されている。）とからなり、プラグには、弁座にスプ
リングの弾発力で当接して流体通路を閉じる第１弁体が
内蔵されているとともに、第１弁体の軸心に形成した貫
通孔内に小径弁体（同じくブリーダーと記載されてい
る）が軸方向に移動自在に内蔵され、該小径弁体は、そ
の前端が第１弁体の前端より突出した状態で貫通孔に設
けた弁座に当接するようにスプリングで付勢されてい
る。一方、ソケットには、弁座にスプリングの弾発力で
当接して流体通路を閉じる第２弁体が内蔵されている。
プラグとソケットを接続する際には、ソケットの第２弁
体の前端でプラグの小径弁体の前端を押し、これによっ
て小径弁体の周囲に、すなわち、第１弁体の貫通孔と小
径弁体との間に流体通路ができ、この流体通路を通って
プラグ内に残存する流体が瞬時に抜けて内圧が低下す
る。このため、ソケットとプラグを接続する際に内圧が
加わっている場合でも、人力でプラグとソケットを接続
できる。2. Description of the Related Art Conventionally, as this type of pipe joint, for example,
There is one disclosed in Japanese Patent Publication No. 59-32711. This conventional pipe joint includes a plug (described as a nipple in the same publication) and a socket (also described as a coupler), and the plug is applied to a valve seat by a spring force of a spring. A first valve body that contacts and closes the fluid passage is incorporated, and a small-diameter valve body (also described as a bleeder) is axially movable in a through hole formed in the axis of the first valve body. The small-diameter valve element is built-in, and is biased by a spring so that the front end of the small-diameter valve element projects from the front end of the first valve element and abuts on a valve seat provided in the through hole. On the other hand, the socket incorporates a second valve body that closes the fluid passage by abutting against the valve seat by the resilience of a spring.
When connecting the plug and the socket, the front end of the small valve body of the plug is pushed by the front end of the second valve body of the socket, whereby around the small diameter valve body, that is, the through hole of the first valve body and the small diameter valve. A fluid passage is formed between the body and the body, and the fluid remaining in the plug is instantaneously released through the fluid passage to reduce the internal pressure. For this reason, even when internal pressure is applied when connecting the socket and the plug, the plug and the socket can be connected manually.
【０００３】[0003]
【発明が解決しようとする課題】ところが、上記従来例
では、小径弁体は中実部材となっており、小径弁体はス
プリングの弾発力とプラグ内に残存する流体の圧力とを
受けて弁座に押圧されている。そのため、その流体圧が
高い程、小径弁体を弁座から離れる方へ押して前記流体
通路を開くために大きな力が必要となる。したがって、
残存する流体の圧力が人力では押せない程に高くなる
と、小径弁体を押す力を小さくするために小径弁体の外
径を小さくせざるを得ない。これによって、その外径を
小さくした分だけ小径弁体の周囲にできる流体通路の通
路断面積が小さくなり、人力で管継手を接続する際に内
部に残存する流体が抜けるのに時間が長くかかる。その
ため、管継手のサイズが大きくなる程、すなわち管継手
が大径になる程、内部に残存する流体量が多くなるの
で、内部に残存する流体が通路断面積の小さい流体通路
を通って抜けるのに要する時間が長くなり、人力で管継
手を接続する際に作業者は長い時間力を加え続けなけれ
ばならず、作業性が悪いという問題があった。したがっ
て、上記従来例に係る管継手は、使用する流体の圧力が
高くなる程、或いは、管継手のサイズが大きくなる程、
適用するのが難しいという問題があった。本発明は、こ
のような従来の問題点に鑑みてなされたもので、その課
題は、流体圧の高さや管継手のサイズに影響されずに、
内圧が加わっている場合でも容易に接続することができ
るとともに、設計の自由度を拡大できる管継手を提供す
ることにある。However, in the above-mentioned conventional example, the small-diameter valve element is a solid member, and the small-diameter valve element receives the elastic force of the spring and the pressure of the fluid remaining in the plug. It is pressed against the valve seat. Therefore, as the fluid pressure becomes higher, a larger force is required to push the small-diameter valve body away from the valve seat to open the fluid passage. Therefore,
If the pressure of the remaining fluid becomes so high that it cannot be pressed by human power, the outer diameter of the small-diameter valve element must be reduced in order to reduce the force for pressing the small-diameter valve element. As a result, the passage cross-sectional area of the fluid passage formed around the small-diameter valve body is reduced by an amount corresponding to the reduced outer diameter, and it takes a long time for the fluid remaining inside to escape when connecting the pipe joint by human power. . Therefore, as the size of the pipe joint increases, that is, as the diameter of the pipe joint increases, the amount of fluid remaining inside increases, and the fluid remaining inside passes through the fluid passage having a small passage cross-sectional area. This requires a long time when connecting the pipe joint by human power, and there is a problem that the workability is poor. Therefore, the pipe joint according to the above conventional example, as the pressure of the fluid used increases, or as the size of the pipe joint increases,
There was a problem that it was difficult to apply. The present invention has been made in view of such conventional problems, and the problem is not affected by the height of the fluid pressure and the size of the pipe joint,
It is an object of the present invention to provide a pipe joint that can be easily connected even when an internal pressure is applied and that can increase the degree of freedom in design.
【０００４】[0004]
【課題を解決するための手段】上記課題を解決するため
請求項１に係る発明は、ソケットとプラグの流体通路に
弁体がそれぞれ内蔵されており、非接続状態ではそれぞ
れの弁体が流体通路に設けた弁座にスプリングの弾発力
で当接して流体通路を閉じ、接続時にそれぞれの弁体が
互いに押し合い弁座から離反して流体通路を開く管継手
であって、ソケットとプラグのいずれか一方の弁体に
は、その中央軸方向に先端側を開口し後端側を閉鎖した
中心穴を形成するとともに、該中心穴内と前記流体通路
とを連通する第１連通孔を形成し、中心穴内には軸方向
に移動自在に嵌合した補助弁体と、該補助弁体を先端方
向に付勢してその先端部を前記弁体の先端から突出させ
るスプリングとを設け、また、弁体の前方内周面と前記
補助弁体前方外周面との間に隙間が形成され、更に、補
助弁体の先端部が弁体の先端から突出した状態にあると
き弁体に形成した第１連通孔の軸方向前後に位置して弁
体と補助弁体との間をそれぞれシールする一対のシール
リングを設け、補助弁体が後退したとき一対のシールリ
ングのうち第１連通孔の前側にあるシールリングによる
シールが解かれ、弁体と補助弁体との間に形成した隙間
と第１連通孔とが連通するように構成したことを特徴と
する。かかる構成により、ソケットとプラグを接続する
際に、ソケットとプラグのいずれか一方の弁体の先端か
ら突出した補助弁体の先端部を他方の弁体の先端で押し
て補助弁体を後退させることにより、前記弁体と補助弁
体との間に設けた一対のシールリングのうち前側にある
シールリングによるシールが解かれ、弁体と補助弁体と
の間に形成した前記隙間と第１連通孔とが連通し、一方
の弁体の流体通路に残存する流体が第１連通孔と前記隙
間を通って他方の弁体内部へ流出する。これによって、
前記一方の弁体を流体通路を閉じる方向へ押圧している
流体の圧力が急速に低下する。このとき、補助弁体は、
その周囲に設けた一対のシールリング間の空間が第１連
通孔を介して流体通路と連通しているため、一対のシー
ルリングが残存する流体により受ける互いに逆向きの軸
方向の力、すなわち、一対のシールリングのシール径の
差に応じた大きさの軸方向の力と、スプリングの弾発力
との合力である一定の押付け力で先端方向に押されてい
る。このため、補助弁体は、上記従来技術の小径弁体の
ように残存する流体の圧力（内圧）を受けて弁座側に押
圧されていない。したがって、残存する流体の圧力が人
力では押せない程に高い流体を使用する場合、或いは、
管継手のサイズが大きい場合でも、上記従来技術の小径
弁体のように、補助弁体を弁座側へ押す力を小さくする
ために補助弁体の外径を小さくする必要がなく、補助弁
体の外径を、流体の圧力や管継手のサイズに影響されず
に自由に決めることができる。また、管継手のサイズが
大きい場合でも、補助弁体の外径を小さくする必要がな
いため、上記従来技術のように内部に残存する流体が抜
けるのに要する時間が長くならず、人力で管継手を接続
する際に作業者は長い時間力を加え続ける必要がなく、
内圧が加わっている場合でも容易に接続することがで
き、作業性が良い。また、一対のシールリングのシール
径を異ならせることにより、そのシール径の差に応じて
補助弁体の開弁圧を任意の値に設定することができる。According to a first aspect of the present invention, a valve body is provided in each of fluid passages of a socket and a plug. A pipe joint which closes the fluid passage by contacting the valve seat provided by the spring with the resilient force of the spring, and when connected, the respective valve bodies push each other away from the valve seat to open the fluid passage. In one of the valve bodies, a central hole having a front end side opened in the central axial direction and a rear end side closed is formed, and a first communication hole communicating the inside of the center hole with the fluid passage is formed. An auxiliary valve body fitted movably in the axial direction in the center hole, and a spring for urging the auxiliary valve body in the distal direction and projecting the distal end from the distal end of the valve body are provided. Front inner peripheral surface of body and front outer peripheral surface of auxiliary valve body A gap is formed between the valve body and the auxiliary valve, and the valve body and the auxiliary valve are positioned axially forward and backward of the first communication hole formed in the valve body when the distal end portion of the auxiliary valve body projects from the distal end of the valve body. A pair of seal rings for sealing between the valve body and the auxiliary valve body are provided, and when the auxiliary valve body retreats, the seal of the pair of seal rings on the front side of the first communication hole is released, and the valve body and the auxiliary valve body are removed. And a gap formed between the first communication hole and the first communication hole communicates with each other. With such a configuration, when the socket and the plug are connected, the distal end of the auxiliary valve body protruding from the distal end of one of the socket and the plug is pushed by the distal end of the other valve body to retract the auxiliary valve body. As a result, the seal formed by the seal ring on the front side of the pair of seal rings provided between the valve element and the auxiliary valve element is released, and the gap formed between the valve element and the auxiliary valve element communicates with the first communication port. The holes communicate with each other, and the fluid remaining in the fluid passage of one valve element flows out into the other valve element through the first communication hole and the gap. by this,
The pressure of the fluid pressing the one valve body in the direction to close the fluid passage rapidly decreases. At this time, the auxiliary valve element
Since the space between the pair of seal rings provided therearound communicates with the fluid passage via the first communication hole, the pair of seal rings receives opposite axial forces received by the remaining fluid, that is, The pair of seal rings are pushed in the distal direction by a constant pressing force, which is a combined force of an axial force having a magnitude corresponding to a difference in seal diameter between the pair of seal rings and an elastic force of the spring. For this reason, the auxiliary valve element is not pressed to the valve seat side by receiving the pressure (internal pressure) of the remaining fluid as in the small-diameter valve element of the related art. Therefore, when using a fluid in which the pressure of the remaining fluid is too high to be pushed by human power, or
Even when the size of the pipe joint is large, there is no need to reduce the outer diameter of the auxiliary valve element in order to reduce the force for pushing the auxiliary valve element toward the valve seat, unlike the above-described conventional small-diameter valve element. The outer diameter of the body can be freely determined without being affected by the pressure of the fluid or the size of the fitting. Further, even when the size of the pipe joint is large, it is not necessary to reduce the outer diameter of the auxiliary valve body, so that the time required for the fluid remaining inside to escape as in the above-described prior art does not become long, and the pipe is manually operated. Workers do not need to keep applying force for a long time when connecting joints,
Connection can be easily made even when internal pressure is applied, and workability is good. Further, by making the seal diameters of the pair of seal rings different, the valve opening pressure of the auxiliary valve body can be set to an arbitrary value according to the difference in the seal diameters.
【０００５】請求項２に係る発明は、一方の弁体の先端
部に、前記隙間を通って先端側に流れてくる流体を同弁
体の内側から外側へ通す第２連通孔を設けたことを特徴
とする。かかる構成により、一方の弁体内に設けた補助
弁体の先端が他方の弁体の先端で押されて両弁体同士が
密着し、弁体と補助弁体との間に形成した隙間が閉塞さ
れた状態になっても、ソケットとプラグのいずれか一方
に残存する流体圧が、第１連通路、前記隙間、および第
２連通孔を通って前記一方の弁体の内側から外側へ流れ
るので、ソケットとプラグを接続する際に、内圧を確実
に低下させることができる。According to a second aspect of the present invention, a second communication hole is provided at the distal end of one of the valve bodies to allow the fluid flowing toward the distal end through the gap from the inside to the outside of the valve body. It is characterized by. With such a configuration, the tip of the auxiliary valve element provided in one valve element is pushed by the tip of the other valve element, and the two valve elements are brought into close contact with each other, and the gap formed between the valve element and the auxiliary valve element is closed. Even if the state is set, the fluid pressure remaining in one of the socket and the plug flows from the inside to the outside of the one valve body through the first communication passage, the gap, and the second communication hole. When the socket and the plug are connected, the internal pressure can be reliably reduced.
【０００６】[0006]
【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいて詳細に説明する。図１は本発明に係る管継手
の実施の形態の一例を示す図で、図３の一部を拡大した
縦断面図、図２は非接続状態にある管継手を示す四半部
縦断面図、図３は接続途中の状態にある管継手を示す四
半部縦断面図、そして、図４は接続完了状態にある管継
手を示す四半部縦断面図である。本例に係る管継手は、
図２に示すように、先端に挿入口１９を有する筒状のソ
ケット１と、該ソケット１にその挿入口から挿入して接
続される筒状のプラグ２とからなる。この管継手は、ソ
ケット１とプラグ２の各流体通路３，４に弁体５，６が
内蔵されており、非接続状態ではそれぞれの弁体５，６
が流体通路３，４にそれぞれ設けた弁座７，８にスプリ
ング９，１０の弾発力で当接して流体通路３，４を閉
じ、接続時にそれぞれの弁体５，６の先端同士が互いに
押し合い弁座７，８から離反して流体通路３，４を開く
ものである。Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a view showing an example of an embodiment of the pipe joint according to the present invention, and is a longitudinal sectional view in which a part of FIG. 3 is enlarged, FIG. 2 is a quarter longitudinal sectional view showing the pipe joint in an unconnected state, FIG. 3 is a quarter longitudinal sectional view showing the pipe joint in the middle of connection, and FIG. 4 is a quarter longitudinal sectional view showing the pipe joint in the connection completed state. The pipe fitting according to this example is
As shown in FIG. 2, the socket 1 includes a cylindrical socket 1 having an insertion port 19 at a distal end, and a cylindrical plug 2 inserted into the socket 1 through the insertion port and connected thereto. This pipe joint has valve bodies 5 and 6 incorporated in respective fluid passages 3 and 4 of the socket 1 and the plug 2, and each valve body 5 and 6 in a disconnected state.
Abuts against valve seats 7 and 8 provided in the fluid passages 3 and 4 by the resilient force of the springs 9 and 10 to close the fluid passages 3 and 4. The fluid passages 3 and 4 are opened apart from the push valve seats 7 and 8.
【０００７】ソケット１の後端側には、配管等とねじ結
合される連結部１１が形成されている。また、ソケット
１の流体通路３の途中には、複数の流通孔１２と弁体５
の軸部１３が摺動自在に嵌合する案内筒部１４とを有す
るバルブ爪１５が配置されている。このバルブ爪１５は
ソケット１の内周面に設けたストップリング１６により
抜け止め固定されている。バルブ爪１５と弁体５との間
に、該弁体５を先端方向に付勢して弁座７に当接させる
スプリング９が介装されている。また、ソケット１の挿
入口１ａの内周面には、該内周面とプラグ２の先端側外
周面との間をシールするＯリングとバックアップリング
とからなるシール部材１７が設けられている。On the rear end side of the socket 1, there is formed a connecting portion 11 which is screwed to a pipe or the like. In the middle of the fluid passage 3 of the socket 1, a plurality of flow holes 12 and the valve 5
A valve claw 15 having a guide cylinder portion 14 into which the shaft portion 13 is slidably fitted is disposed. The valve claw 15 is fixed so as not to come off by a stop ring 16 provided on the inner peripheral surface of the socket 1. A spring 9 is provided between the valve claw 15 and the valve element 5 to urge the valve element 5 in the distal direction to contact the valve seat 7. A seal member 17 including an O-ring and a backup ring for sealing between the inner peripheral surface and the outer peripheral surface on the distal end side of the plug 2 is provided on the inner peripheral surface of the insertion port 1 a of the socket 1.
【０００８】ソケット１の先端側外周には、ソケット１
とプラグ２をロックするロック位置（図４に示す位置）
と該ロックを解除するロック解除位置（図３に示す位
置）との間で摺動自在にスリーブ１８を嵌合させてあ
る。すなわち、ソケット１の先端部に複数のロックボー
ル嵌合孔１９が周方向にほぼ等間隔に形成され、該各嵌
合孔１９にロックボール２０が出没自在に嵌合してい
る。[0008] The socket 1
Lock position to lock the plug 2 and the plug 2 (position shown in FIG. 4)
The sleeve 18 is slidably fitted between the lock release position (the position shown in FIG. 3) for releasing the lock. That is, a plurality of lock ball fitting holes 19 are formed at the distal end portion of the socket 1 at substantially equal intervals in the circumferential direction, and the lock ball 20 is fitted into each of the fitting holes 19 so as to be freely retractable.
【０００９】スリーブ１８の先端部内周面にはロックボ
ール２０を求心方向に押圧する押圧部２２と、ロックボ
ール２０の遠心方向への移動を許容する解放部２３とが
形成されている。また、スリーブ１８は、押圧部２２が
ロックボール２０を求心方向に押圧するロック位置側に
スプリング２４により付勢されている。この位置では、
スリーブ１８の先端が抜け止めを兼ねたストッパ２５に
当接し先端方向への移動が規制されている。この状態か
ら、スリーブ１８を図２に示すロック位置からスプリン
グ２４の弾発力に抗して同図の左方へ移動させると、ロ
ックボール２０は押圧部２２による押圧から解放され遠
心方向へ移動可能になるので、ソケット１の先端挿入口
１ａにプラグ２を挿入していくと、ロックボール２０が
プラグ２の外周に形成されているロックボール係合溝２
１に係合し、ソケット１とプラグ２とが接続固定される
ようになっている。A pressing portion 22 for pressing the lock ball 20 in the centripetal direction and a release portion 23 for allowing the lock ball 20 to move in the centrifugal direction are formed on the inner peripheral surface of the distal end portion of the sleeve 18. Further, the sleeve 18 is urged by a spring 24 toward a lock position where the pressing portion 22 presses the lock ball 20 in the centripetal direction. In this position,
The distal end of the sleeve 18 comes into contact with a stopper 25 also serving as a stopper, and the movement in the distal direction is restricted. When the sleeve 18 is moved from the locked position shown in FIG. 2 to the left in FIG. 2 against the elastic force of the spring 24 from this state, the lock ball 20 is released from the pressing by the pressing portion 22 and moves in the centrifugal direction. When the plug 2 is inserted into the front end insertion opening 1a of the socket 1, the lock ball 20 is formed in the lock ball engaging groove 2 formed on the outer periphery of the plug 2.
1 so that the socket 1 and the plug 2 are connected and fixed.
【００１０】一方、プラグ２にあっては、その後端側
に、配管等とねじ結合される連結部２６が形成されてい
る。また、プラグ２の流体通路４の途中には、複数の流
通孔２７と弁体６を案内する案内筒部２８とを有するバ
ルブ爪２９が配置されている。このバルブ爪２９はプラ
グ２の内周面に設けたストップリング３０により抜け止
め固定されている。バルブ爪２９と弁体６との間に、該
弁体６を先端方向に付勢して弁座８に当接させるスプリ
ング１０が介装されている。On the other hand, the plug 2 has a connecting portion 26 formed at its rear end side, which is screwed to a pipe or the like. In the middle of the fluid passage 4 of the plug 2, a valve claw 29 having a plurality of flow holes 27 and a guide cylinder 28 for guiding the valve element 6 is arranged. The valve claw 29 is secured by a stop ring 30 provided on the inner peripheral surface of the plug 2. A spring 10 is provided between the valve claw 29 and the valve element 6 to urge the valve element 6 in the distal direction to abut on the valve seat 8.
【００１１】プラグ２の弁体６には、図１に示すよう
に、その中央軸方向に先端側を開口し後端側を閉鎖した
中心穴３１が形成されているとともに、該中心穴３１内
と流体通路４とを連通する第１連通孔３２が形成されて
いる。すなわち、本例では、弁体６は、軸心部に貫通孔
を有し弁座８に当接する頭部３３ａと該頭部から後端側
へ延びる筒部３３ｂとが一体に形成された弁本体３３
と、閉鎖した底部を有する筒体３４の２部材からなり、
筒体３４の開口端側を弁本体３３の筒部内周に嵌合さ
せ、該筒部をカシメて筒体３４と一体化してある。この
一体化はねじまたはロー付であってもよい。これによっ
て、前記中心穴３１が、弁本体３３の貫通孔と、筒体３
４の穴とにより形成されている。また、弁本体３３の筒
部３３ｂには前記第１連通孔３２が形成されている。ま
た、弁体６の筒体３４をバルブ爪２９の案内筒部２８に
摺動自在に嵌合させてある。これによって、弁体６がプ
ラグ２内を軸方向真直に移動可能になっている。As shown in FIG. 1, the valve body 6 of the plug 2 is formed with a center hole 31 which is open at the front end and closed at the rear end in the center axis direction. A first communication hole 32 that communicates with the fluid passage 4 is formed. That is, in this example, the valve element 6 is a valve in which a head portion 33a having a through hole in the axial center portion and abutting on the valve seat 8 and a cylindrical portion 33b extending from the head portion to the rear end side are integrally formed. Body 33
And two members of a cylindrical body 34 having a closed bottom,
The opening end side of the cylinder 34 is fitted to the inner periphery of the cylinder of the valve body 33, and the cylinder is caulked and integrated with the cylinder 34. This integration may be threaded or brazed. As a result, the center hole 31 is connected to the through hole of the valve body 33 and the cylindrical body 3.
4 holes. Further, the first communication hole 32 is formed in the cylindrical portion 33 b of the valve body 33. The cylinder 34 of the valve 6 is slidably fitted to the guide cylinder 28 of the valve claw 29. Thus, the valve element 6 can move straight in the plug 2 in the axial direction.
【００１２】弁体６の中心穴３１内には、円筒状の補助
弁体３５を軸方向に移動自在に嵌合させてあるととも
に、補助弁体３５を先端方向に付勢してその先端部を図
２に示すように弁体６の先端から突出させるスプリング
３６が設けられている。また、補助弁体３５の外周に
は、補助弁体３５の先端部が弁体６の先端から突出した
状態にあるとき（図２参照）、弁体６に形成した第１連
通孔３２の軸方向前後に位置して弁体６と補助弁体３５
との間をそれぞれシールする一対のシールリング３７，
３８が設けられている。これによって、非接続状態にお
いて補助弁体３５は、その周囲に設けた一対のシールリ
ング３７，３８間の空間４７が第１連通孔３２を介して
流体通路４と連通しているため、両シールリング３７，
３８が流体通路に残存する流体により受ける互いに逆向
きの軸方向の力、すなわち、一対のシールリング３７，
３８のシール径の差に応じた大きさの軸方向の力と、ス
プリングの弾発力との合力で先端方向に押されている。A cylindrical auxiliary valve body 35 is fitted in the center hole 31 of the valve body 6 so as to be movable in the axial direction. As shown in FIG. 2, a spring 36 is provided to project from the tip of the valve body 6. On the outer periphery of the auxiliary valve element 35, when the distal end of the auxiliary valve element 35 projects from the distal end of the valve element 6 (see FIG. 2), the shaft of the first communication hole 32 formed in the valve element 6 is formed. The valve element 6 and the auxiliary valve element 35 are located in front and rear directions.
, A pair of seal rings 37 for sealing between
38 are provided. Accordingly, in the non-connected state, the auxiliary valve body 35 is configured such that the space 47 between the pair of seal rings 37 and 38 provided therearound communicates with the fluid passage 4 through the first communication hole 32, Ring 37,
, Which are received by the fluid remaining in the fluid passage in the opposite axial direction, ie, a pair of seal rings 37,
38 is pushed in the distal direction by the combined force of the axial force having a magnitude corresponding to the difference in the seal diameter and the spring force of the spring.
【００１３】そして、補助弁体３５は、図２に示すよう
にその先端部が弁体６の先端から突出した閉弁位置と、
この位置からスプリング３６の弾発力に抗して後退した
開弁位置（図１に示す位置）との間で、所定のストロー
クだけ移動可能である。すなわち、補助弁体３５の中央
部より先端側の部分は、弁本体３３の貫通孔３３ａの先
端側部分である小径孔部３９に僅かな隙間４５を持って
嵌合する外径の小径筒部４０に形成され、その中央部に
は、シールリング３７の収容溝を形成する環状の突部４
１が形成され、また、この突部４１より後端側の部分
は、筒体３４内を摺動自在に嵌合する筒部４２に形成さ
れている。As shown in FIG. 2, the auxiliary valve body 35 has a valve-closing position in which the distal end projects from the distal end of the valve body 6.
From this position, it is possible to move by a predetermined stroke between a valve opening position (the position shown in FIG. 1) which is retracted against the elastic force of the spring 36. That is, the portion of the auxiliary valve body 35 on the distal end side from the center portion is fitted with a small-diameter hole portion 39, which is the distal end portion of the through hole 33a of the valve body 33, with a small gap 45 with an outer diameter. An annular projection 4 which forms a receiving groove for the seal ring 37 is formed at the center of the annular projection 4.
1 is formed, and a portion on the rear end side of the protrusion 41 is formed in a cylindrical portion 42 which is slidably fitted in the cylindrical body 34.
【００１４】さらに、補助弁体３５が図２に示す位置か
ら図３に示す位置まで所定のストロークだけ後退したと
き、一対のシールリング３７，３８のうち第１連通孔３
２の前側にあるシールリング３７によるシールが解か
れ、弁体６と補助弁体３５との間に形成された隙間４５
と第１連通孔３２とが連通するように構成されている
（図１参照）。すなわち、本例では、補助弁体３５が図
２に示す閉弁位置にあるとき、シールリング３７が小径
孔部３９より大径で弁本体３３の貫通孔の後端側に形成
した中径孔部４３の内周面に密着するとともに、該中径
孔部４３と小径孔部３９の段差部で環状の突部４１が当
接し、補助弁体３５が位置決めされ、これによって、流
体通路４内の流体が補助弁体３５の外周を通って外部に
流出しないようになっている。そして、補助弁体３５が
図２に示す閉弁位置から図１に示す開弁位置まで所定の
ストロークだけ後退すると、シールリング３７が中径孔
部４３の内周面から外れ、該中径孔部４３より大径で第
１連通孔３２と連通した大径孔部４４内に位置し、これ
によって、弁体６と補助弁体３５との間に形成された隙
間４５が連通し、流体通路４内の流体が第１連通孔３２
および補助弁体３５の隙間４５を通って先端側へ抜ける
ようになっている。Further, when the auxiliary valve body 35 is retracted by a predetermined stroke from the position shown in FIG. 2 to the position shown in FIG. 3, the first communication hole 3 of the pair of seal rings 37, 38 is formed.
The seal provided by the seal ring 37 on the front side of the valve body 2 is released, and a gap 45 formed between the valve body 6 and the auxiliary valve body 35 is released.
And the first communication hole 32 communicate with each other (see FIG. 1). That is, in this example, when the auxiliary valve body 35 is at the valve closing position shown in FIG. 2, the seal ring 37 has a diameter larger than the small diameter hole 39 and is formed at the rear end side of the through hole of the valve body 33. While being in close contact with the inner peripheral surface of the portion 43, the annular projection 41 abuts at the step between the middle diameter hole 43 and the small diameter hole 39, and the auxiliary valve body 35 is positioned. Is prevented from flowing out through the outer periphery of the auxiliary valve body 35 to the outside. When the auxiliary valve body 35 is retracted by a predetermined stroke from the valve closing position shown in FIG. 2 to the valve opening position shown in FIG. 1, the seal ring 37 is disengaged from the inner peripheral surface of the medium diameter hole portion 43, and The fluid passage is located in a large-diameter hole portion 44 having a diameter larger than that of the portion 43 and communicating with the first communication hole 32, whereby a gap 45 formed between the valve body 6 and the auxiliary valve body 35 communicates. Fluid in the first communication hole 32
And through the gap 45 of the auxiliary valve element 35 to the distal end side.
【００１５】また、弁体６の先端部には、前記隙間４５
を通って流れてくる流体を弁体６の内側から外側へ通す
第２連通孔４６が設けられている。また、前記シール部
材１７は、補助弁体３５が図１に示す位置まで後退して
隙間４５が連通する前に、ソケット１の先端部内周面と
プラグ２の先端部外周面との間をシールする位置に配置
されている。これによって、隙間４５および第２連通孔
４６を通って流出する流体が外へ漏れないようになって
いる。そして、プラグ２の先端部をソケット１の先端挿
入口１ａに挿入していく際に、ソケット１側の弁体５に
よって押されて補助弁体３５が後退して第１連通孔３２
と隙間４５が連通するのとほぼ同時或いはその前に、ソ
ケット１の弁体５が図１に示すように弁座７から離れて
開弁するように構成されている。これによって、隙間４
５を通って第２連通孔４６から流出する流体がソケット
１の流体通路３側へ流れるようになっている。The tip of the valve body 6 is provided with the gap 45.
A second communication hole 46 that allows the fluid flowing therethrough to pass from the inside to the outside of the valve body 6 is provided. The seal member 17 seals the gap between the inner peripheral surface of the distal end portion of the socket 1 and the outer peripheral surface of the distal end portion of the plug 2 before the auxiliary valve body 35 is retracted to the position shown in FIG. It is arranged in the position to be. This prevents the fluid flowing out through the gap 45 and the second communication hole 46 from leaking outside. When the distal end portion of the plug 2 is inserted into the distal end insertion opening 1a of the socket 1, the auxiliary valve body 35 is pushed back by the valve body 5 on the socket 1 side and retreats to the first communication hole 32.
The valve body 5 of the socket 1 is configured to be separated from the valve seat 7 and open at substantially the same time as or before the gap 45 communicates with the valve seat 7 as shown in FIG. Thereby, the gap 4
The fluid flowing out of the second communication hole 46 through the hole 5 flows to the fluid passage 3 side of the socket 1.
【００１６】上記構成を有する本例に係る管継手を接続
する際に、スリーブ１８を図２に示すロック位置からス
プリング２４の弾発力に抗して同図の左方へ移動させ、
この状態でソケット１の先端挿入口１ａにプラグ２の先
端部を挿入していくと、プラグ２の弁体６の先端から突
出した補助弁体３５の先端部がソケット１の弁体５の先
端で押され（図１，図３を参照）、図２に示す位置から
図１に示す位置まで所定のストロークだけ後退し、補助
弁体３５の外周に設けた２個のシールリング３７，３８
のうち前側にあるシールリング３７によるシールが解か
れ、弁体６と補助弁体３５との間に形成した隙間４５と
第１連通孔３２とが連通する。これによって、プラグ２
の流体通路４に残存する流体が第１連通孔３２、前記隙
間４５、および第２連通孔４６を通って接続相手である
ソケット１の流体通路３内へ流出していく。その結果、
ソケット１とプラグ２を接続する際に加わっている内
圧、すなわち、プラグ２の弁体６に流体通路４を閉じる
方向に作用している流体の圧力が急速に低下し、弁体６
も図４に示すように開弁位置に変位する。これによっ
て、ソケット１とプラグ２の各流体通路３，４が連通す
るとともに、ロックボール２０がプラグ２のロックボー
ル係合溝２１に係合した状態で、前記スリーブ１８をス
プリング２４の付勢力により復帰させ、該ロックボール
２０がスリーブ１８の押圧部２２で押圧されて接続が完
了する。When connecting the pipe joint according to the present embodiment having the above configuration, the sleeve 18 is moved from the locked position shown in FIG.
When the distal end of the plug 2 is inserted into the distal end insertion opening 1a of the socket 1 in this state, the distal end of the auxiliary valve 35 protruding from the distal end of the valve 6 of the plug 2 is moved to the distal end of the valve 5 of the socket 1. (See FIGS. 1 and 3), retreats by a predetermined stroke from the position shown in FIG. 2 to the position shown in FIG. 1, and has two seal rings 37, 38 provided on the outer periphery of the auxiliary valve body 35.
The seal by the seal ring 37 on the front side is released, and the gap 45 formed between the valve body 6 and the auxiliary valve body 35 communicates with the first communication hole 32. This allows plug 2
The fluid remaining in the fluid passage 4 flows out through the first communication hole 32, the gap 45, and the second communication hole 46 into the fluid passage 3 of the socket 1 to be connected. as a result,
The internal pressure applied when connecting the socket 1 and the plug 2, that is, the pressure of the fluid acting on the valve body 6 of the plug 2 in the direction of closing the fluid passage 4 rapidly decreases, and the valve body 6
Is also displaced to the valve opening position as shown in FIG. Thus, the sleeve 18 is pressed by the spring 24 with the lock ball 20 engaged with the lock ball engaging groove 21 of the plug 2 while the socket 1 and the fluid passages 3 and 4 of the plug 2 communicate with each other. Then, the lock ball 20 is pressed by the pressing portion 22 of the sleeve 18 to complete the connection.
【００１７】上記構成を有する本例に係る管継手によれ
ば、ソケット１とプラグ２を接続する際に、プラグ２の
弁体６の先端から突出した補助弁体３５の先端部をソケ
ット１の弁体５の先端で押すことにより、補助弁体３５
を図２に示す位置から図１に示す位置まで所定のストロ
ークだけ後退させると、補助弁体３５の外周に設けた一
対のシールリング３７，３８のうち前側にあるシールリ
ング３７によるシールが解かれ、弁体６と補助弁体３５
との間に形成した隙間４５と第１連通孔３２とが連通
し、プラグ２の流体通路４に残存する流体が、第１連通
孔３２および前記隙間４５を通って第２連通孔４６から
流出し、相手側の開弁している弁体５よりその流体通路
３内部へ流れる。これによって、弁体６を流体通路４を
閉じる方向へ押圧している流体の圧力が急速に低下す
る。このとき、補助弁体３５は、その周囲に設けた一対
のシールリング３７，３８間の空間４７が第１連通孔３
２を介して流体通路４と連通しているため、一対のシー
ルリング３７，３８が残存する流体により受ける互いに
逆向きの軸方向の力、すなわち、一対のシールリング３
７，３８のシール径の差に応じた大きさの軸方向の力
（本例では、シールリング３７の方がシールリング３８
よりシール径が大きく、その差に応じた大きさの先端方
向へ押す力）とスプリング３６の弾発力との合力で先端
方向に押されている。このため、補助弁体３５は、上記
従来技術の小径弁体のように残存する流体の圧力（内
圧）を径全体で受けて弁座側に押圧されていない。した
がって、残存する流体の圧力が人力では押せない程に高
い流体を使用する場合、或いは、管継手のサイズが大き
い場合でも、上記従来技術の小径弁体のように、補助弁
体３５を弁座側へ押す力を小さくするために補助弁体３
５の外径を小さくする必要がなく、補助弁体３５の外径
を、流体の圧力や管継手のサイズに影響されず自由に決
めることができる。また、管継手のサイズが大きい場合
でも、補助弁体３５の外径を小さくする必要がないた
め、上記従来技術のように内部に残存する流体が抜ける
のに要する時間が長くならず、人力で管継手を接続する
際に作業者は長い時間力を加え続ける必要がなく、内圧
が加わっている場合でも容易に接続することができ、作
業性が良い。また、一対のシールリング３７，３８のシ
ール径を異ならせることにより、そのシール径の差に応
じて補助弁体３５の開弁圧を任意の値に設定することが
できる。According to the pipe joint according to the present embodiment having the above configuration, when connecting the socket 1 and the plug 2, the distal end of the auxiliary valve body 35 protruding from the distal end of the valve 6 of the plug 2 is connected to the socket 1. By pushing with the tip of the valve element 5, the auxiliary valve element 35
Is retracted by a predetermined stroke from the position shown in FIG. 2 to the position shown in FIG. 1, the seal by the seal ring 37 on the front side of the pair of seal rings 37, 38 provided on the outer periphery of the auxiliary valve body 35 is released. , Valve element 6 and auxiliary valve element 35
And the first communication hole 32 communicates with the first communication hole 32, and the fluid remaining in the fluid passage 4 of the plug 2 flows out of the second communication hole 46 through the first communication hole 32 and the gap 45. Then, the fluid flows into the fluid passage 3 from the valve body 5 that is open on the other side. As a result, the pressure of the fluid pressing the valve body 6 in the direction to close the fluid passage 4 rapidly decreases. At this time, the space 47 between the pair of seal rings 37 and 38 provided around the auxiliary valve body 35 is the first communication hole 3.
2 and the fluid path 4, the pair of seal rings 37, 38 receive opposite axial forces received by the remaining fluid, that is, the pair of seal rings 3.
The axial force having a magnitude corresponding to the difference between the seal diameters of the seal rings 7 and 38 (in this example, the seal ring 37 is the seal ring 38
The force is pushed in the distal direction by the combined force of the larger diameter of the seal and the pushing force in the distal direction having a size corresponding to the difference) and the elastic force of the spring 36. For this reason, the auxiliary valve element 35 receives the pressure (internal pressure) of the remaining fluid over the entire diameter unlike the small-diameter valve element of the related art, and is not pressed toward the valve seat. Therefore, even when a fluid whose pressure of the remaining fluid is so high that it cannot be pressed by human power, or when the size of the pipe joint is large, the auxiliary valve body 35 is connected to the valve seat as in the small-diameter valve body of the related art. Auxiliary valve element 3 to reduce the pushing force to the side
The outer diameter of the auxiliary valve body 35 does not need to be reduced, and the outer diameter of the auxiliary valve body 35 can be freely determined without being affected by the pressure of the fluid or the size of the pipe joint. Further, even when the size of the pipe joint is large, it is not necessary to reduce the outer diameter of the auxiliary valve body 35, so that the time required for the fluid remaining inside to escape as in the above-described prior art does not become long, and human power is required. When connecting the pipe joint, the worker does not need to apply force for a long time, and can easily connect even when an internal pressure is applied, and the workability is good. Further, by making the seal diameters of the pair of seal rings 37 and 38 different, the valve opening pressure of the auxiliary valve body 35 can be set to an arbitrary value according to the difference between the seal diameters.
【００１８】実際には、シールリング３７のシール径を
シールリング３８のシール径より大きくしてある。これ
によって、補助弁体３５は、一対のシールリング３７，
３８のシール径の差に応じた大きさの軸方向先端側へ押
す力と、スプリング３６の弾発力との合力で先端側へ押
されている。In practice, the seal diameter of the seal ring 37 is made larger than the seal diameter of the seal ring 38. As a result, the auxiliary valve body 35 is configured such that the pair of seal rings 37,
The pressing force toward the distal end in the axial direction having a size corresponding to the difference in the seal diameter at 38 and the resilient force of the spring 36 are pressed toward the distal end.
【００１９】さらに、本例に係る管継手によれば、プラ
グ２側にある補助弁体３５の先端と弁体６の先端とがソ
ケット１側にある弁体５の先端で押されて両弁体５，６
の先端面が閉塞された状態（図１および図３に示す状
態）でも、プラグ２の流体通路４に残存する流体が、第
１連通孔３２、補助弁体３５の周囲にできる隙間４５、
および径方向に設けた第２連通孔４６を通ってソケット
１側の流体通路３に抜けるので、ソケット１とプラグ２
を接続する際に、内圧を確実に低下させることができ
る。Further, according to the pipe joint according to the present embodiment, the tip of the auxiliary valve body 35 on the plug 2 side and the tip of the valve body 6 are pushed by the tip of the valve body 5 on the socket 1 side, so that the two valves are closed. Body 5,6
Even when the front end face of the plug 2 is closed (the state shown in FIG. 1 and FIG. 3), the fluid remaining in the fluid passage 4 of the plug 2 allows the gap 45 formed around the first communication hole 32 and the auxiliary valve body 35,
And through the second communication hole 46 provided in the radial direction to the fluid passage 3 on the socket 1 side, so that the socket 1 and the plug 2
, The internal pressure can be reliably reduced.
【００２０】また、本例によれば、補助弁体３５を円筒
状に形成したので、該弁体３５が軸方向に移動する際
に、弁体６に設けた中央穴３１の体積変化を防止して補
助弁体３５の不作動を防止できる。Further, according to this embodiment, since the auxiliary valve body 35 is formed in a cylindrical shape, the volume change of the central hole 31 provided in the valve body 6 is prevented when the valve body 35 moves in the axial direction. As a result, the inoperative of the auxiliary valve body 35 can be prevented.
【００２１】なお、上記一例に係る管継手では、プラグ
２の弁体６に形成した中心穴３１内に補助弁体３５を設
けたが、ソケット１側に内圧が残る場合は、ソケット１
の弁体５に前記中心穴３１と同様の中心穴を形成し、こ
の中心穴内に補助弁体３５と同様の弁体を設けることに
より、上記一例と同様の作用効果が得られる。In the pipe joint according to the above example, the auxiliary valve element 35 is provided in the center hole 31 formed in the valve element 6 of the plug 2. However, when the internal pressure remains on the socket 1 side, the socket 1
By forming a center hole similar to the center hole 31 in the valve body 5 and providing a valve body similar to the auxiliary valve body 35 in this center hole, the same operation and effect as in the above example can be obtained.
【００２２】[0022]
【発明の効果】以上説明したように、請求項１に係る発
明によれば、流体圧の高さや管継手のサイズに影響され
ずに、内圧が加わっている場合でも容易に接続すること
ができるとともに、設計の自由度を拡大することができ
る。As described above, according to the first aspect of the present invention, connection can be easily made even when an internal pressure is applied, without being affected by the height of the fluid pressure or the size of the pipe joint. At the same time, the degree of freedom in design can be expanded.
【００２３】請求項２に係る発明によれば、ソケットと
プラグを接続する際に、内圧を確実に低下させることが
できる。According to the second aspect of the invention, when connecting the socket and the plug, the internal pressure can be reliably reduced.
【図１】本発明に係る管継手の実施の形態の一例を示す
図で、図３の一部を拡大した縦断面図。FIG. 1 is a view showing an example of an embodiment of a pipe joint according to the present invention, and is a longitudinal sectional view in which a part of FIG. 3 is enlarged.
【図２】非接続状態にある管継手を示す縦断面図。FIG. 2 is a longitudinal sectional view showing the pipe joint in a disconnected state.
【図３】接続途中の状態にある管継手を示す縦断面図。FIG. 3 is a longitudinal sectional view showing the pipe joint in a state of being connected.
【図４】接続完了状態にある管継手を示す縦断面図。FIG. 4 is a longitudinal sectional view showing the pipe joint in a connection completed state.
１・・・・・・・・・・ソケット １ａ・・・・・・・・・挿入口 ２・・・・・・・・・・プラグ ３，４・・・・・・・・流体通路 ５，６・・・・・・・・弁体 ７，８・・・・・・・・弁座 ９，１０・・・・・・・スプリング １１，２６・・・・・・連結部 １２，２７・・・・・・流通孔 １３・・・・・・・・・軸部 １４，２８・・・・・・案内筒部 １５，２９・・・・・・バルブ爪 １６，３０・・・・・・ストップリング １７・・・・・・・・・シール部材 １８・・・・・・・・・スリーブ １９・・・・・・・・・ロックボール嵌合孔 ２０・・・・・・・・・ロックボール ２１・・・・・・・・・ロックボール係合溝 ２２・・・・・・・・・押圧部 ２３・・・・・・・・・解放部 ２４・・・・・・・・・スプリング ２５・・・・・・・・・ストッパ ３１・・・・・・・・・中心穴 ３２・・・・・・・・・第１連通孔 ３３・・・・・・・・・弁本体 ３４・・・・・・・・・筒体 ３５・・・・・・・・・補助弁体 ３６・・・・・・・・・スプリング ３７，３８・・・・・・シールリング ３９・・・・・・・・・小径孔部 ４０・・・・・・・・・小径筒部 ４１・・・・・・・・・環状の突部 ４２・・・・・・・・・筒部 ４３・・・・・・・・・中径孔部 ４４・・・・・・・・・大径孔部 ４５・・・・・・・・・隙間 ４６・・・・・・・・・第２連通孔 ４７・・・・・・・・・空間 1 ······ Socket 1a ··························································· Plug 3 , 6, ..., valve body 7, 8, ..., valve seat 9, 10, ..., spring 11, 26, ... connecting part 12, 27 ············································································································ .... Stop ring 17 ... Seal member 18 ... Sleeve 19 ... Lock ball fitting hole 20 ... ··· Lock ball 21 ······ Lock ball engagement groove 22 ············································································· ... Spring 25 ... Stopper 31 Central hole 32 First communication hole 33 Valve body 34 ······ Cylindrical body 35 ··················································· Spring 37, 38 ································・ Small diameter hole part 40 ・ ・ ・ ・ ・ ・ ・ ・ ・ Small diameter cylinder part 41 ・ ・ ・ ・ ・ ・ ・ ・ ・ Annular protrusion 42 ・ ・ ・ ・ ・ ・ ・ ・ ・ Cylinder part 43 ・ ・ ・ ・ ・ ・... Medium diameter hole 44 ... Large diameter hole 45 ... Gap 46 ... Second communication hole 47 ······space
Claims (2)
れぞれ内蔵されており、非接続状態ではそれぞれの弁体
が流体通路に設けた弁座にスプリングの弾発力で当接し
て流体通路を閉じ、接続時にそれぞれの弁体が互いに押
し合い弁座から離反して流体通路を開く管継手であっ
て、 前記ソケットとプラグのいずれか一方の弁体には、その
中央軸方向に先端側を開口し後端側を閉鎖した中心穴を
形成するとともに、該中心穴内と前記流体通路とを連通
する第１連通孔を形成し、 前記中心穴内には軸方向に移動自在に嵌合した補助弁体
と、該補助弁体を先端方向に付勢してその先端部を前記
弁体の先端から突出させるスプリングとを設け、また、
前記弁体の前方内周面と前記補助弁体前方外周面との間
に隙間が形成され、更に、前記補助弁体の先端部が前記
弁体の先端から突出した状態にあるとき前記弁体に形成
した第１連通孔の軸方向前後に位置して弁体と補助弁体
との間をそれぞれシールする一対のシールリングを設
け、前記補助弁体が後退したとき一対のシールリングの
うち前記第１連通孔の前側にあるシールリングによるシ
ールが解かれ、弁体と補助弁体との間に形成した前記隙
間と前記第１連通孔とが連通するように構成したことを
特徴とする管継手。A valve body is provided in each of the fluid passages of the socket and the plug. In a non-connected state, each valve body abuts on a valve seat provided in the fluid passage by the resilient force of a spring to open the fluid passage. A pipe joint that closes and opens the fluid passage by pushing each valve body away from the valve seat at the time of connection, and one of the valve bodies of the socket and the plug has a front end side opened in the central axial direction. An auxiliary valve body having a central hole with a rear end closed and a first communication hole communicating the inside of the central hole with the fluid passage; and an axially movably fitted auxiliary valve body in the central hole. And a spring for urging the auxiliary valve element in the distal direction to project the distal end portion from the distal end of the valve element,
A gap is formed between a front inner peripheral surface of the valve body and a front outer peripheral surface of the auxiliary valve body, and further, when the distal end of the auxiliary valve body is in a state of protruding from the distal end of the valve body, the valve body A pair of seal rings are provided in front and rear of the first communication hole formed in the axial direction to seal between the valve body and the auxiliary valve body, and when the auxiliary valve body retreats, A pipe characterized in that a seal formed by a seal ring at a front side of the first communication hole is released, and the gap formed between the valve body and the auxiliary valve body communicates with the first communication hole. Fittings.
通って先端側に流れてくる流体を同弁体の内側から外側
へ通す第２連通孔を設けたことを特徴とする請求項１記
載の管継手。2. A valve according to claim 1, wherein a distal end of said one valve element is provided with a second communication hole through which fluid flowing toward the distal end through said gap passes from inside to outside of said valve element. Item 7. The pipe joint according to Item 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24951999A JP4404413B2 (en) | 1999-09-03 | 1999-09-03 | Pipe fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24951999A JP4404413B2 (en) | 1999-09-03 | 1999-09-03 | Pipe fitting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001074187A true JP2001074187A (en) | 2001-03-23 |
| JP4404413B2 JP4404413B2 (en) | 2010-01-27 |
Family
ID=17194193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24951999A Expired - Lifetime JP4404413B2 (en) | 1999-09-03 | 1999-09-03 | Pipe fitting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4404413B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007114039A1 (en) * | 2006-03-31 | 2007-10-11 | Nitto Kohki Co., Ltd. | Pipe joint |
| JP2007537401A (en) * | 2004-05-13 | 2007-12-20 | エムエスアー アウアー ゲーエムベーハー | Coupling for compressed gas cylinder |
| JP2009014169A (en) * | 2007-07-09 | 2009-01-22 | Bridgestone Flowtech Corp | Pipe joint with valve and valve support of pipe joint with valve |
| JP2009014168A (en) * | 2007-07-09 | 2009-01-22 | Bridgestone Flowtech Corp | Pipe joint with valve and valve support of pipe joint with valve |
| JP2009024855A (en) * | 2007-07-23 | 2009-02-05 | Bridgestone Flowtech Corp | Pipe joint provided with valve and its valve-support |
| WO2009104409A1 (en) * | 2008-02-20 | 2009-08-27 | 株式会社ワークスベル | Power transmission device |
| CN106939950A (en) * | 2017-04-28 | 2017-07-11 | 中国电子科技集团公司第四十研究所 | It is a kind of from pressure release fluid connector |
| JP2019502114A (en) * | 2015-12-16 | 2019-01-24 | ジーイー・ヘルスケア・バイオプロセス・アールアンドディ・アクチボラグ | Stackable chromatography column module with inlet and outlet valves |
-
1999
- 1999-09-03 JP JP24951999A patent/JP4404413B2/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007537401A (en) * | 2004-05-13 | 2007-12-20 | エムエスアー アウアー ゲーエムベーハー | Coupling for compressed gas cylinder |
| KR101033438B1 (en) | 2006-03-31 | 2011-05-09 | 니토 코키 가부시키가이샤 | Pipe joint |
| JP2007271052A (en) * | 2006-03-31 | 2007-10-18 | Nitto Kohki Co Ltd | Pipe joint |
| WO2007114039A1 (en) * | 2006-03-31 | 2007-10-11 | Nitto Kohki Co., Ltd. | Pipe joint |
| JP4653688B2 (en) * | 2006-03-31 | 2011-03-16 | 日東工器株式会社 | Pipe fitting |
| JP2009014169A (en) * | 2007-07-09 | 2009-01-22 | Bridgestone Flowtech Corp | Pipe joint with valve and valve support of pipe joint with valve |
| JP2009014168A (en) * | 2007-07-09 | 2009-01-22 | Bridgestone Flowtech Corp | Pipe joint with valve and valve support of pipe joint with valve |
| JP2009024855A (en) * | 2007-07-23 | 2009-02-05 | Bridgestone Flowtech Corp | Pipe joint provided with valve and its valve-support |
| WO2009104409A1 (en) * | 2008-02-20 | 2009-08-27 | 株式会社ワークスベル | Power transmission device |
| JP2019502114A (en) * | 2015-12-16 | 2019-01-24 | ジーイー・ヘルスケア・バイオプロセス・アールアンドディ・アクチボラグ | Stackable chromatography column module with inlet and outlet valves |
| JP6991640B2 (en) | 2015-12-16 | 2022-01-12 | サイティバ・バイオプロセス・アールアンドディ・アクチボラグ | Stackable chromatographic column module with inlet and outlet valves |
| CN106939950A (en) * | 2017-04-28 | 2017-07-11 | 中国电子科技集团公司第四十研究所 | It is a kind of from pressure release fluid connector |
| CN106939950B (en) * | 2017-04-28 | 2023-03-14 | 中国电子科技集团公司第四十研究所 | Self-pressure-relief fluid connector |
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|---|---|
| JP4404413B2 (en) | 2010-01-27 |
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