JP2005315420A - Joint - Google Patents

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JP2005315420A
JP2005315420A JP2005099192A JP2005099192A JP2005315420A JP 2005315420 A JP2005315420 A JP 2005315420A JP 2005099192 A JP2005099192 A JP 2005099192A JP 2005099192 A JP2005099192 A JP 2005099192A JP 2005315420 A JP2005315420 A JP 2005315420A
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Prior art keywords
joint
valve body
guided
liquid flow
valve seat
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JP2005099192A
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Japanese (ja)
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Hiroshi Okuma
寛 大熊
Kenta Obara
賢太 小原
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Nabtesco Corp
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Nabtesco Corp
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Priority to JP2005099192A priority Critical patent/JP2005315420A/en
Publication of JP2005315420A publication Critical patent/JP2005315420A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L37/00—Couplings of the quick-acting type
    • F16L37/28—Couplings of the quick-acting type with fluid cut-off means
    • F16L37/30—Couplings of the quick-acting type with fluid cut-off means with fluid cut-off means in each of two pipe-end fittings
    • F16L37/32—Couplings of the quick-acting type with fluid cut-off means with fluid cut-off means in each of two pipe-end fittings at least one of two lift valves being opened automatically when the coupling is applied

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Joints That Cut Off Fluids, And Hose Joints (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint capable of preventing the impairing of sealing performance even in a case when a valve element is made out of a synthetic resin. <P>SOLUTION: This joint comprises a joint main body 2 having an axially extended cavity 3 opened at its front side faced to a mating joint 50, and provided with a valve seat 5 on its inner peripheral face near the opening part 4, and the valve element 10 axially movably loaded in the cavity 3 of the joint main body 2 and having a seal part 11 for cutting off a liquid flow channel by being kept into contact with the whole periphery of the valve seat 5. The joint main body 2 has a cylindrical inner peripheral face 3a having an inner diameter larger than a maximum diameter of the valve seat 5 on a position at a rear side with respect to the valve seat 5, the valve element 10 is made out of a synthetic resin material, and has a guided part 12 having an outer diameter larger than a maximum diameter of the seal part 11 and axially guided by the cylindrical inner peripheral face 3a of the joint main body 2, on a position at a rear side with respect to the seal part 11, and the axially extended liquid flow channel 13 is formed on a position at a radial outer side with respect to the seal part 11 in the guided part 12. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、例えば自動車等の油圧管を互いに連結分離させる継ぎ手に関する。   The present invention relates to a joint for connecting and separating hydraulic pipes such as automobiles.

上記継ぎ手として、図７に示す構成のものが知られている（特許文献１参照）。この継ぎ手は、継ぎ手本体１００の内部に設けた空洞１０１内に配したポペット弁体１０２を備え、そのポペット弁体１０２は概略円錐形状をした先端部と、それよりも小径の軸部とを有し、軸部が軸心方向にスライド可能に保持部材１０３に支持されていて、その保持部材１０３に、空洞１０１内を通流する流体を通す流体通流路１０４が周方向に複数形成され、流体がポペット弁体１０２の外側を通流するようになっており、ポペット弁体１０２における先端側のシール部１０５が空洞１０１内に設けた弁座１０６に接触すると液通流を停止し、一方、シール部１０５が弁座１０６から離れると液流通を可能とする。   As the joint, one having the structure shown in FIG. 7 is known (see Patent Document 1). The joint includes a poppet valve body 102 disposed in a cavity 101 provided in the joint body 100, and the poppet valve body 102 has a substantially conical tip portion and a shaft portion having a smaller diameter. The shaft portion is supported by the holding member 103 so as to be slidable in the axial direction, and a plurality of fluid passages 104 are formed in the holding member 103 in the circumferential direction for allowing fluid flowing through the cavity 101 to pass therethrough. The fluid flows through the outside of the poppet valve body 102. When the seal portion 105 on the distal end side of the poppet valve body 102 contacts the valve seat 106 provided in the cavity 101, the liquid flow is stopped. When the seal part 105 is separated from the valve seat 106, the liquid flow is enabled.

上記継ぎ手のように弁体を保持部材にてスライド可能に支持する構成に代えて、図８に示すように、継ぎ手本体１１０の内部に設けた空洞１１１内に、空洞１１１とほぼ同じ外径の弁体１１２自体がスライド可能に支持された構成のものも提案されている（特許文献２参照）。   Instead of the configuration in which the valve body is slidably supported by the holding member like the joint, as shown in FIG. 8, the cavity 111 provided inside the joint body 110 has an outer diameter substantially the same as the cavity 111. A structure in which the valve body 112 is slidably supported has also been proposed (see Patent Document 2).

この継ぎ手による場合には、上述したように空洞１１１の内周壁で弁体１１２をスライド可能に支持する。そして、上記特許文献１の継ぎ手では保持部材１０３が弁ばね支持手段を兼ねているのに対し、この特許文献２の継ぎ手は、弁ばね支持手段１１７を別途備えていて、その弁ばね支持手段１１７が弁体１１２をスライド可能に支持するものではない。つまり、上記弁ばね支持手段１１７は、特許文献１の継ぎ手において相応する保持部材１０３に比べて、必要機能が少ない分だけ設計的要件を少なくすることができる。これにより、特許文献２の継ぎ手は、上記弁ばね支持手段１１７の継ぎ手本体１１０への取付け方法を種々選択し易いため、継ぎ手本体１１０の後端部に配管をつなげる際にその弁ばね支持手段１１７を有効に利用し易いという利点がある。
実公昭５７−３４３９６号公報 特開平６−１７４１６４号公報 When using this joint, the valve body 112 is slidably supported by the inner peripheral wall of the cavity 111 as described above. In the joint of Patent Document 1, the holding member 103 also serves as a valve spring support means. On the other hand, the joint of Patent Document 2 is provided with a separate valve spring support means 117, and the valve spring support means 117. However, the valve body 112 is not slidably supported. That is, the valve spring support means 117 can reduce the design requirements by the amount of the required functions as compared with the holding member 103 corresponding to the joint of Patent Document 1. As a result, since the joint of Patent Document 2 can easily select various attachment methods of the valve spring support means 117 to the joint body 110, the valve spring support means 117 is connected when piping is connected to the rear end portion of the joint body 110. Is advantageous in that it can be used effectively.
Japanese Utility Model Publication No. 57-34396 JP-A-6-174164

しかしながら、特許文献２の継ぎ手にあっては、弁体１１２の内部を流体通路として用いるため、その弁体１１２の外周側と内部流体通路とを連絡するための貫通孔１１３を設ける必要があり、その貫通孔１１３が、弁体１１２を径方向に貫通するとともに、弁座１１４に対して接離する弁体１１２のシール部１１５に形成されているため、弁体を合成樹脂材料により形成する場合に、以下のような問題があった。   However, in the joint of Patent Document 2, since the inside of the valve body 112 is used as a fluid passage, it is necessary to provide a through hole 113 for connecting the outer peripheral side of the valve body 112 and the internal fluid passage. When the through hole 113 is formed in the seal portion 115 of the valve body 112 that penetrates the valve body 112 in the radial direction and contacts and separates from the valve seat 114, the valve body is formed of a synthetic resin material. However, there were the following problems.

即ち、弁体を金属材料で形成した場合、弁座への直接接触では金属同士の接触となるためにシール性の確保が困難であるため、弁体の弁座と接触する部分にシール材を介在させる必要があるのに対し、弁体を合成樹脂材料で形成する場合には、弁座への直接接触によるシール性の確保が容易であるため、シール材を不要にできる。しかし、特許文献２の継ぎ手による場合には、貫通孔１１３がシール部１１５に直径方向に設けられているため、シール部１１５付近の肉厚が周方向で不均一となり、弁体を合成樹脂材料で形成すると、樹脂成型時の温度変化による収縮度合いが周方向で不均一となってシール部の真円度が確保できず、シール性能が悪化する虞がある。   In other words, when the valve body is made of a metal material, it is difficult to ensure the sealing performance because the metal contacts with each other in direct contact with the valve seat. On the other hand, when the valve body is formed of a synthetic resin material, it is easy to ensure sealing performance by direct contact with the valve seat, so that a sealing material can be dispensed with. However, in the case of the joint of Patent Document 2, since the through-hole 113 is provided in the seal portion 115 in the diameter direction, the thickness near the seal portion 115 becomes uneven in the circumferential direction, and the valve body is made of a synthetic resin material. If it is formed, the degree of shrinkage due to temperature change during resin molding is not uniform in the circumferential direction, and the roundness of the seal portion cannot be ensured, and the sealing performance may be deteriorated.

本発明は、このような従来技術の課題を解決するためになされたもので、弁体を合成樹脂製としてもシール性能の悪化を防止することができる継ぎ手を提供することを目的とする。   The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to provide a joint that can prevent deterioration in sealing performance even if the valve body is made of a synthetic resin.

本発明の請求項１の継ぎ手は、相手方の継ぎ手に向かう前方側を開口した軸方向に延びる空洞を有し、その開口部近傍の内周面に弁座が形成された継ぎ手本体と、この継ぎ手本体の前記空洞内に軸方向へ移動可能に装填され、前記弁座に対してその全周にわたり接触することにより液流通路を遮断するシール部を有した弁体とを備え、この弁体が、前記シール部が前記弁座に接触する閉弁位置と前記弁座から離れた開弁位置との間で移動可能に設けられた継ぎ手において、前記継ぎ手本体は、前記弁座よりも後方側の位置に当該弁座の最大径よりも大きな内径をもつ円筒状内周面を有し、前記弁体は、合成樹脂材料により成形され、前記シール部よりも後方側の位置に、当該シール部の最大径よりも大きな外径であって前記継ぎ手本体の円筒状内周面により軸方向に案内される外径をもつ被案内部を有し、この被案内部において前記シール部よりも径方向外側の位置に軸方向に延びる液流通路が形成されていることを特徴とする。   According to a first aspect of the present invention, there is provided a joint main body having a hollow extending in the axial direction that opens on the front side toward the counterpart joint, and a valve seat formed on the inner peripheral surface in the vicinity of the opening, and the joint. A valve body that is movably loaded in the cavity of the main body and has a seal portion that shuts off the liquid flow passage by contacting the valve seat over its entire circumference. In the joint provided movably between the valve closing position where the seal portion contacts the valve seat and the valve opening position away from the valve seat, the joint body is located on the rear side of the valve seat. A cylindrical inner peripheral surface having an inner diameter larger than the maximum diameter of the valve seat at a position, and the valve body is formed of a synthetic resin material, and is positioned at a position on the rear side of the seal portion. The outer diameter of the joint larger than the maximum diameter of the joint body A guided portion having an outer diameter guided in the axial direction by the inner peripheral surface, and a liquid flow passage extending in the axial direction is formed at a position radially outside the seal portion in the guided portion. It is characterized by.

本発明の請求項２の継ぎ手は、請求項１に記載の継ぎ手において、前記弁体のシール部は、その周方向に肉厚が均一な回転体形状に成形されていることを特徴とする。   A joint according to a second aspect of the present invention is the joint according to the first aspect, wherein the sealing portion of the valve body is formed into a rotating body shape having a uniform thickness in the circumferential direction.

本発明の請求項３の継ぎ手は、請求項２に記載の継ぎ手において、前記被案内部は、周方向に間欠的に並び、前記シール部の外周部から後方に向かって延びる複数の被案内片を有し、これら被案内片同士の間に前記液流通路が形成されていることを特徴とする。   A joint according to a third aspect of the present invention is the joint according to the second aspect, wherein the guided portions are intermittently arranged in the circumferential direction and extend from the outer peripheral portion of the seal portion toward the rear. The liquid flow passage is formed between the guided pieces.

本発明の請求項４の継ぎ手は、請求項３に記載の継ぎ手において、前記複数の被案内片の内側には、該弁体の後端と前記シール部よりも後方側であって前記液流通路の前端又はその後方位置との間にわたり内部通路が上記液流通路に繋がる状態で形成され、かつ、弁体の上記内部通路を前側から臨む面には後方に向いて突出する凸部が形成されていることを特徴とする。   According to a fourth aspect of the present invention, there is provided the joint according to the third aspect, wherein the liquid flow is arranged behind the rear end of the valve body and the seal portion inside the plurality of guided pieces. Formed in a state where the internal passage is connected to the liquid flow passage between the front end of the passage or the rear position thereof, and a convex portion protruding backward is formed on the surface of the valve body facing the internal passage from the front side. It is characterized by being.

本発明の請求項５の継ぎ手は、請求項４に記載の継ぎ手において、前記凸部が前記内部通路の中心部に近づく程後側に位置する形状となっていることを特徴とする。   A joint according to a fifth aspect of the present invention is the joint according to the fourth aspect, characterized in that the joint has a shape that is located on the rear side as it approaches the center of the internal passage.

本発明の請求項６の継ぎ手は、請求項５に記載の継ぎ手において、前記凸部が、周方向で同一半径としかつ前記内部通路と同一軸心状に形成されているとともに前記液流通路が周方向に均等に複数設けられていることを特徴とする。   A joint according to a sixth aspect of the present invention is the joint according to the fifth aspect, wherein the convex portion has the same radius in the circumferential direction and is formed in the same axial center as the internal passage, and the liquid flow passage is It is characterized in that a plurality are provided evenly in the circumferential direction.

本発明の請求項７の継ぎ手は、請求項１乃至６のいずれかに記載の継ぎ手において、前記空洞内には、前記円筒状内周面よりも後方の位置にその内周面が拡径された段差部が形成されるとともに、この段差部に後方から押付けられることにより前記空洞内に固定される金属固定部材と、この金属固定部材と前記弁体との間に介在することにより前記弁体を前方へ付勢するばねとを備えたことを特徴とする。   A joint according to a seventh aspect of the present invention is the joint according to any one of the first to sixth aspects, wherein the inner peripheral surface of the joint is expanded in the cavity at a position rearward of the cylindrical inner peripheral surface. A metal fixing member that is fixed in the cavity by being pressed against the step part from the rear, and the valve body is interposed between the metal fixing member and the valve body. And a spring for urging the lens forward.

本発明の請求項８の継ぎ手は、請求項７に記載の継ぎ手において、前記空洞の後方側の端部に、フレア部を有する金属管が内部に通された金属製の環状固着部材がねじ込まれ、そのねじ込み力によりフレア部が、前記金属固定部材に押付けられていることを特徴とする。   According to an eighth aspect of the present invention, there is provided the joint according to the seventh aspect, wherein a metal annular fixing member having a metal tube having a flared portion inserted therein is screwed into an end portion on the rear side of the cavity. The flare portion is pressed against the metal fixing member by the screwing force.

請求項１の発明による場合には、弁体に成形されている被案内部が空洞に案内されるので、別途支持部材を要しない。しかも、この被案内部はシール部の最大径よりも大径であり、かつこの被案内部においてシール部よりも径方向外側の位置に流体通路が軸方向に延びるように設けられる構成としているので、弁体を合成樹脂製としてもシール部の肉厚を均一化することが可能となって、シール部の真円度を確保することが可能となり、シール性能を悪化させることがない。特に、請求項２のようにシール部を周方向に肉厚が均一な回転体形状に成形することで、シール部の真円度の確保がより確実となる。   In the case of the first aspect of the invention, the guided portion molded in the valve body is guided into the cavity, so that no separate support member is required. In addition, since the guided portion has a larger diameter than the maximum diameter of the seal portion, the fluid passage is provided in the guided portion at a position radially outside the seal portion so as to extend in the axial direction. Even if the valve body is made of synthetic resin, the thickness of the seal portion can be made uniform, the roundness of the seal portion can be secured, and the sealing performance is not deteriorated. In particular, the roundness of the seal portion can be ensured more reliably by forming the seal portion into a rotating body shape having a uniform thickness in the circumferential direction as in claim 2.

請求項３の発明による場合には、被案内部の被案内片が周方向に間欠的に設けられ、分散配置となっているため、被案内片により弁体を空洞内においてスライド可能に安定して支持することができる。また、被案内片同士の間に液通流路が設けられているので、液の通流を円滑に行わせることが可能となる。   In the case of the invention of claim 3, since the guided pieces of the guided portion are intermittently provided in the circumferential direction and are arranged in a distributed manner, the guided body stably stabilizes the valve body in the cavity. Can be supported. Moreover, since the liquid flow path is provided between the guided pieces, it is possible to smoothly flow the liquid.

請求項４の発明による場合には、弁体の内部通路を前側から臨む面に、後方に向いて突出する凸部が形成されているので、内部通路から液流通路へ向かう液流が内部通路で淀むことなく液流通路へ流れ、前記内部通路を前側から臨む面を前側に窪むように形成した場合に顕著に起こる圧力損失を減少させ得る。   In the case of the invention according to claim 4, since the convex portion projecting rearward is formed on the surface facing the internal passage of the valve body from the front side, the liquid flow from the internal passage toward the liquid flow passage is It is possible to reduce the pressure loss that occurs remarkably when the surface that flows into the liquid flow passage without stagnation and the surface facing the internal passage from the front side is formed to be recessed toward the front side.

請求項５の発明による場合には、凸部が内部通路の中心部に近づく程後側に位置する形状となっているので、凸部において液流を滑らかにすることが可能となり、圧力損失の減少化をより高めることが可能となる。   In the case of the invention according to claim 5, since the convex portion has a shape that is located on the rear side as it approaches the central portion of the internal passage, the liquid flow can be made smooth in the convex portion, and pressure loss can be reduced. It is possible to further increase the decrease.

請求項６の発明による場合には、凸部が周方向で同一半径としかつ内部通路と同一軸心状に形成されているので、内部通路を流れる液流を内部通路の周方向で均一化でき、しかも液流通路が周方向に均等に設けられているので、各液流通路へ導かれる液流を均一化させ得る。   In the case of the invention of claim 6, since the convex portion has the same radius in the circumferential direction and is formed in the same axial center as the internal passage, the liquid flow through the internal passage can be made uniform in the circumferential direction of the internal passage. Moreover, since the liquid flow passages are provided uniformly in the circumferential direction, the liquid flow guided to each liquid flow passage can be made uniform.

請求項７の発明による場合には、後方からの押付け力を金属固定部材で受け止めて、合成樹脂製の弁体を保護した上で、この固定部材と弁体との間に介在するばねで弁体を付勢することができる。   According to the seventh aspect of the present invention, the pressing force from the rear is received by the metal fixing member to protect the valve body made of synthetic resin, and the spring is interposed between the fixing member and the valve body. The body can be energized.

請求項８の発明による場合には、合成樹脂製の弁体の後方側に金属固定部材が設けられているので、この金属固定部材と、継ぎ手本体の後端側に金属管を内部に通して着脱可能に取付けられる金属製の環状固着部材（ナット）との間、つまり金属同士の間で、上記金属管の端部に設けられるフレア部を挟んで固定することができるため、上記金属固定部材を有効に利用したフレア管継ぎ手を提供することが可能となる。   In the case of the invention according to claim 8, since the metal fixing member is provided on the rear side of the synthetic resin valve body, the metal pipe is passed through the metal fixing member and the rear end side of the joint body. The metal fixing member can be fixed between a metal annular fixing member (nut) that is detachably attached, that is, between metals, with a flare provided at the end of the metal tube interposed therebetween. Therefore, it is possible to provide a flare pipe joint that effectively utilizes the above.

以下に、本発明の実施形態を具体的に説明する。   Embodiments of the present invention will be specifically described below.

図１は、本実施形態に係る２つの継ぎ手の両方を示す断面図である。   FIG. 1 is a cross-sectional view showing both of two joints according to the present embodiment.

ここで、上記２つの継ぎ手は、一方（左側）の継ぎ手１が雄型で、相手方の継ぎ手５０が雌型であること以外は同様に構成されていて、以下の説明では左側の継ぎ手について述べる。   The two joints are configured in the same manner except that one (left side) joint 1 is a male type and the counterpart joint 50 is a female type. In the following description, the left side joint will be described.

上記継ぎ手１は、金属製の継ぎ手本体２と、この継ぎ手本体２の内部にそれぞれ装填される弁体１０及び金属製の固定部材２０とを備える。   The joint 1 includes a metal joint main body 2, and a valve body 10 and a metal fixing member 20 that are respectively loaded in the joint main body 2.

継ぎ手本体２は、軸方向に延びる空洞３を内部に有し、その空洞３は相手方の継ぎ手５０に向かって軸方向に開口しており、その前方側（相手方の継ぎ手５０に向かう側）の開口部４の後側近傍には、空洞３の内周面に開口部４から離れるに従って拡径する形状の弁座５が形成されている。空洞３内には、弁座５が形成される部分よりも後方側の位置に弁座５の最大径よりも大きな内径をもつ円筒状内周面３ａが形成され、その円筒状内周面３ａよりも後方側には、後側が拡径した段差部６が設けられ、空洞３の後端部には雌ねじ７が形成されており、その雌ねじ７には、金属製の環状固着部材としてのナット３０が螺入されている。   The joint body 2 has a cavity 3 extending in the axial direction inside, and the cavity 3 is opened in the axial direction toward the mating joint 50, and an opening on the front side (side toward the mating joint 50). In the vicinity of the rear side of the portion 4, a valve seat 5 is formed on the inner peripheral surface of the cavity 3 so as to increase in diameter as the distance from the opening 4 increases. In the cavity 3, a cylindrical inner peripheral surface 3a having an inner diameter larger than the maximum diameter of the valve seat 5 is formed at a position on the rear side of the portion where the valve seat 5 is formed, and the cylindrical inner peripheral surface 3a. On the rear side, a stepped portion 6 whose rear side is enlarged is provided, and a female screw 7 is formed at the rear end portion of the cavity 3. A nut as a metal annular fixing member is formed on the female screw 7. 30 is screwed.

空洞３内には、ナット３０により抜け防止された状態で固定部材２０が設けられている。この固定部材２０は、後方側が拡径した凸部２１を有し、ナット３０により前方側へ押付けられることで凸部２１側が段差部６に当接し、空洞３内の所定箇所に設けられている。そして、ナット３０の内部を通り、かつフレア部２３をナット３０の前方側に配した金属管２２の前記フレア部２３が、ナット３０のねじ込み力により固定部材２０に押付けられた状態で、金属製の固定部材２０と金属製ナット３０との間に挟持されている。   A fixing member 20 is provided in the cavity 3 in a state in which the nut 3 is prevented from coming off. The fixing member 20 has a convex portion 21 whose rear side is enlarged in diameter, and is pressed to the front side by a nut 30 so that the convex portion 21 abuts on the stepped portion 6 and is provided at a predetermined location in the cavity 3. . Then, the flare portion 23 of the metal tube 22 that passes through the inside of the nut 30 and has the flare portion 23 disposed on the front side of the nut 30 is pressed against the fixing member 20 by the screwing force of the nut 30. Between the fixing member 20 and the metal nut 30.

固定部材２０よりも前方側であって円筒状内周面３ａ内には、上記弁体１０が軸方向へスライド可能に装填されている。弁体１０には、その前方側に向かうに従って縮径する形状を有するシール部１１が形成されており、この弁体１０と固定部材２０との間には、コイルばね２４が介装され、弁体１０にはコイルばね２４による前方側への押圧付勢力が作用している。   The valve body 10 is slidably loaded in the axial direction in the cylindrical inner peripheral surface 3a on the front side of the fixing member 20. The valve body 10 is formed with a seal portion 11 having a shape that decreases in diameter toward the front side, and a coil spring 24 is interposed between the valve body 10 and the fixing member 20, A forward biasing force by the coil spring 24 acts on the body 10.

よって、弁体１０は、上記押圧付勢力により前方側へ向けてスライドし、これに伴いシール部１１の全周が弁座５に接触する。このとき、弁体１０におけるシール部１１よりも前方側に位置する先端部１０ａは、開口部４よりも外側に突出するように形成されている。一方、相手方の継ぎ手５０とこの継ぎ手１を連結すると、継ぎ手５０の先端部１０ａと、継ぎ手１の先端部１０ａとがそれぞれ後方側へ押圧付勢力に抗して押し込まれ、シール部１１が弁座５から離れる。したがって、弁体１０は、シール部１１が弁座５に接触する閉弁位置と、シール部１１が弁座５から軸方向に後退する開弁位置との間で移動可能となっている。   Therefore, the valve body 10 slides toward the front side by the pressing urging force, and accordingly, the entire circumference of the seal portion 11 contacts the valve seat 5. At this time, the tip portion 10 a located on the front side of the seal portion 11 in the valve body 10 is formed so as to protrude outward from the opening portion 4. On the other hand, when the mating joint 50 and the joint 1 are connected, the distal end portion 10a of the joint 50 and the distal end portion 10a of the joint 1 are respectively pushed rearward against the pressing force, and the seal portion 11 is moved to the valve seat. Leave 5 Therefore, the valve body 10 is movable between a valve closing position where the seal portion 11 contacts the valve seat 5 and a valve opening position where the seal portion 11 moves backward from the valve seat 5 in the axial direction.

図２は弁体を斜め前方向から見た外観図で、図３（ａ）は弁体を示す正面図、図３（ｂ）は正面断面図（図３（ｃ）のＢ−Ｂ線による断面図）、図３（ｃ）は図３（ａ）の右側面図、図３（ｄ）は図３（ａ）のＤ−Ｄ線による断面図である。   FIG. 2 is an external view of the valve body as viewed obliquely from front, FIG. 3 (a) is a front view showing the valve body, and FIG. 3 (b) is a front sectional view (according to line BB in FIG. 3 (c)). 3 (c) is a right side view of FIG. 3 (a), and FIG. 3 (d) is a sectional view taken along the line DD of FIG. 3 (a).

弁体１０は、シール部１１よりも後方側の位置に、シール部１１の最大径よりも大きな外径であって前記継ぎ手本体２の円筒状内周面３ａにより軸方向に案内される外径をもつ被案内部１２を有する。この被案内部１２は、周方向に間欠的に並び、シール部１１の外周部から後方に向かって延びる複数、図示例では４つの被案内片１２ａを有し、これら被案内片１２ａの後端は、環状連結部１２ｂにより連結されていて撓み防止が図られており、被案内片１２ａ同士の間に、被案内片１２ａと同数の液流通路１３が形成された構成となっている。液流通路１３は、シール部１１よりも径方向外側の位置に、軸方向に伸びるように設けられていて、空洞３内の液を軸方向に流通させる機能を有する。この弁体１０は、その全体が合成樹脂材料により一体的に成形されたもので、シール部１１は合成樹脂からなるとともに、その周方向に肉厚が均一な回転体形状に成形されている。   The valve body 10 has an outer diameter larger than the maximum diameter of the seal portion 11 at a position rearward of the seal portion 11 and is guided in the axial direction by the cylindrical inner peripheral surface 3a of the joint body 2. It has the guided part 12 with. The guided portion 12 is arranged intermittently in the circumferential direction and has a plurality of guided pieces 12a extending in the rearward direction from the outer peripheral portion of the seal portion 11, and the rear end of the guided pieces 12a. Are connected by an annular connecting portion 12b to prevent bending, and the same number of liquid flow passages 13 as the guided pieces 12a are formed between the guided pieces 12a. The liquid flow passage 13 is provided at a position radially outward from the seal portion 11 so as to extend in the axial direction, and has a function of circulating the liquid in the cavity 3 in the axial direction. The entire valve body 10 is integrally formed of a synthetic resin material. The seal portion 11 is made of a synthetic resin and is formed into a rotating body shape having a uniform thickness in the circumferential direction.

このように構成された継ぎ手の液流につき説明する。なお、ここでは、継ぎ手１側から継ぎ手５０側へ液を通流される場合を例に挙げる。   The liquid flow of the joint configured as described above will be described. Here, a case where liquid is passed from the joint 1 side to the joint 50 side will be described as an example.

開口部４よりも外側に突出している弁体１０の先端部１０ａ同士の位置を合わせて継ぎ手１と５０とを接続すると、両継ぎ手の弁体１０がコイルばね２４による押圧付勢力に抗して後方側へ押し込まれ、シール部１１が弁座５から離れる。これにより、継ぎ手１側の金属管２２の内部を通流する液は、弁体１０に設けた液流通路１３を介してシール部１１の外側へ導かれ、その後開口部４を経て、継ぎ手５０側の開口部４内へ入り、その継ぎ手５０の液流通路１３を経て金属管２２に導かれる。   When the joints 1 and 50 are connected by aligning the positions of the tip portions 10a of the valve body 10 protruding outward from the opening 4, the valve bodies 10 of both joints resist the pressing biasing force of the coil spring 24. The seal portion 11 is separated from the valve seat 5 by being pushed rearward. Thereby, the liquid flowing through the inside of the metal pipe 22 on the joint 1 side is guided to the outside of the seal portion 11 through the liquid flow passage 13 provided in the valve body 10, and then passes through the opening portion 4 and then the joint 50. It enters into the side opening 4 and is guided to the metal pipe 22 through the liquid flow passage 13 of the joint 50.

一方、継ぎ手１と５０とを非接続状態にすると、弁体１０はコイルばね２４による押圧付勢力により前方側へ向けてスライドし、シール部１１の全周が弁座５に接触する。これにより、各継ぎ手１と５０の液流が遮断される。   On the other hand, when the joints 1 and 50 are disconnected from each other, the valve body 10 slides forward due to the pressing biasing force of the coil spring 24, and the entire circumference of the seal portion 11 contacts the valve seat 5. Thereby, the liquid flow of each joint 1 and 50 is interrupted | blocked.

したがって、このように構成された本実施形態の継ぎ手１及び５０においては、弁体１０に成形されている被案内部１２が空洞３の円筒状内周面３ａに案内されるので、別途支持部材を要しない。しかも、この被案内部１２はシール部１１の最大径よりも大径であり、かつこの被案内部１２においてシール部１１よりも径方向外側の位置に流体通路１３が軸方向に伸びるように設けられる構成としているので、弁体１０を合成樹脂製としてもシール部１１の肉厚を均一化することが可能となって、シール部１１の真円度を確保することが可能となり、シール性能を悪化させることがない。特に、シール部１１を周方向に肉厚が均一な回転体形状に成形することで、シール部１１の真円度の確保がより確実となる。   Therefore, in the joints 1 and 50 of the present embodiment configured as described above, the guided portion 12 formed on the valve body 10 is guided to the cylindrical inner peripheral surface 3a of the cavity 3, so that a separate support member is provided. Is not required. In addition, the guided portion 12 has a diameter larger than the maximum diameter of the seal portion 11, and the fluid passage 13 extends in the axial direction at a position radially outside the seal portion 11 in the guided portion 12. Therefore, even if the valve body 10 is made of a synthetic resin, the thickness of the seal portion 11 can be made uniform, and the roundness of the seal portion 11 can be ensured, and the sealing performance can be improved. There is no worsening. In particular, the roundness of the seal portion 11 can be more reliably ensured by forming the seal portion 11 into a rotating body shape having a uniform thickness in the circumferential direction.

また、本実施形態において、被案内部１２の被案内片１２ａが周方向に間欠的に設けられ、分散配置となっているため、被案内片１２ａにより弁体１０を空洞３内においてスライド可能に安定して支持することができる。また、被案内片１２ａ同士の間に液通流路１３が設けられているので、液の通流を円滑に行わせることが可能となる。加えて、ナット３０の固着に伴う後方からの押付け力を金属製固定部材２０で受け止めて、合成樹脂製の弁体１０を保護した上で、この固定部材２０と弁体１０との間に介在するばね２４で弁体１０を前方へ付勢することができる。更に、合成樹脂製の弁体１０の後端側に金属製固定部材２０が設けられているので、この金属製固定部材２０と、継ぎ手本体１、５０の後端側に金属管２２を内部に通して着脱可能に取付けられる金属製のナット３０との間、つまり金属同士の間で、金属管２２の端部に設けられるフレア部２３を挟んで固定することができるため、上記金属製固定部材２０を有効に利用したフレア管継ぎ手を提供することが可能となる。   Further, in the present embodiment, the guided pieces 12a of the guided portion 12 are intermittently provided in the circumferential direction and are distributed, so that the valve body 10 can be slid in the cavity 3 by the guided pieces 12a. It can be supported stably. In addition, since the liquid flow path 13 is provided between the guided pieces 12a, it is possible to smoothly flow the liquid. In addition, the pressing force from the rear accompanying the fixing of the nut 30 is received by the metal fixing member 20 to protect the valve body 10 made of synthetic resin, and then interposed between the fixing member 20 and the valve body 10. The spring body 24 can urge the valve body 10 forward. Further, since the metal fixing member 20 is provided on the rear end side of the synthetic resin valve body 10, the metal fixing member 20 and the metal pipe 22 on the rear end side of the joint bodies 1 and 50 are provided inside. Since the flare 23 provided at the end of the metal tube 22 can be sandwiched and fixed between the metal nuts 30 that are detachably mounted through, that is, between the metals, the metal fixing member It is possible to provide a flare pipe joint that effectively uses 20.

なお、上述した実施形態における被案内部は、複数の被案内片の間に複数の液流通路が設けられた構成としているが、本発明はこれに限らない。例えば、シール部の最大径よりも大きな外径であって継ぎ手本体の円筒状内周面により軸方向に案内される外径をもつ被案内部に弁体の内部と外部とに開口を有する液流通路を１又は２以上設ける構成としてもよい。   In addition, although the to-be-guided part in embodiment mentioned above is set as the structure by which the some liquid flow path was provided between several to-be-guided pieces, this invention is not limited to this. For example, a liquid having openings on the inside and outside of the valve body in a guided portion having an outer diameter larger than the maximum diameter of the seal portion and having an outer diameter guided in the axial direction by the cylindrical inner peripheral surface of the joint body It is good also as a structure which provides one or two or more flow paths.

また、本発明は、上述した図２及び図３に示した弁体１０に代えて、図４及び図５に示す他の構成の弁体１０Ａを用いることができる。なお、図４及び図５において、図２及び図３の弁体と同一部分には同一番号を付している。   Further, in the present invention, a valve body 10A having another configuration shown in FIGS. 4 and 5 can be used in place of the valve body 10 shown in FIGS. 2 and 3 described above. 4 and 5, the same parts as those in FIGS. 2 and 3 are denoted by the same reference numerals.

この弁体１０Ａは、一体成形により作製された合成樹脂製のもので、周方向の外径を均一とした中実の回転体形状に形成されたシール部１１Ａを有し、そのシール部１１Ａの外周部から後方に向かう複数の被案内片１２ａが、周方向に間欠的に並べて設けられている。これら被案内片１２ａの後端部は、環状連結部１２ｂにより連結されていて、被案内片１２ａ同士の間には液流通路１３が形成されている。この液流通路１３は周方向に均等に複数、図示例では４つ設けられている。   This valve body 10A is made of a synthetic resin produced by integral molding, and has a seal portion 11A formed in a solid rotating body shape with a uniform outer diameter in the circumferential direction. A plurality of guided pieces 12a heading rearward from the outer peripheral portion are provided intermittently arranged in the circumferential direction. The rear end portions of these guided pieces 12a are connected by an annular connecting portion 12b, and a liquid flow passage 13 is formed between the guided pieces 12a. A plurality of liquid flow passages 13 are provided equally in the circumferential direction, and four in the illustrated example.

上記複数の被案内片１２ａの内側には、液流通路１３に繋がった状態で内部通路１５が形成されている。内部通路１５の後端は弁体１０Ａの後端に位置し、内部通路１５の前端１５ａは液流通路１３の前端１３ａに位置している。また、弁体１０Ａには、内部通路１５を前側から臨む面に、後方に向いて突出する凸部１４が形成されている。この凸部１４は、内部通路１５と同一軸心状に形成されていて、内部通路１５の中心部に近づく程後側に位置する凸形状、図示例では頂部分が丸くなった円錐台形状、つまり周方向で同一半径の形状となっている。   Inside the plurality of guided pieces 12a, an internal passage 15 is formed in a state connected to the liquid flow passage 13. The rear end of the internal passage 15 is located at the rear end of the valve body 10 </ b> A, and the front end 15 a of the internal passage 15 is located at the front end 13 a of the liquid flow passage 13. Further, the valve body 10A is formed with a convex portion 14 projecting rearward on the surface facing the internal passage 15 from the front side. This convex portion 14 is formed in the same axial center as the internal passage 15 and is located on the rear side as it approaches the central portion of the internal passage 15, in the illustrated example, a truncated cone shape whose top portion is rounded, That is, it has a shape with the same radius in the circumferential direction.

この弁体１０Ａによる場合は、以下の効果が得られる。即ち、図６（ａ）に示すように内部通路１０ｂを、その前端位置が液流通路１３の前端１３ａよりも前方に位置するように形成した場合には、その内部通路１０ｂを後方から前方へ向けて流れる白抜矢印で示す液流が、内部通路１０ｂの前端に存在する前側に窪んだ面１０ｃに衝突することにより一旦後側に戻って液流通路１３から前側へ出ていくために、面１０ｃで淀みが発生し大きな圧力損失が起こる。これに対し、図６（ｂ）に示すように弁体１０Ａによる場合は、内部通路１５をその前端１５ａが液流通路１３の前端１３ａに位置するように形成するとともに、内部通路１５を前側から臨む面に後方に向いて突出する凸部１４を形成しているので、内部通路１５から液流通路１３へ向かう液流が内部通路１５で淀むことなく液流通路１３へ流れ、圧力損失を減少させ得る。この圧力損失の減少化は、凸部１４を単に凸形状にする場合よりも、内部通路１５の中心部に近づく程後側に位置する形状にする場合の方が、凸部１４を通る液流がより滑らかになることで、より高めることが可能となる。また、凸部１４が内部通路１５と同一軸心状に形成されていると、周方向に均等配置した液流通路１３に対し、複数（図示例では４つ）の液流通路１３それぞれに導かれる液流の状況を均一にすることができる。なお、以上の効果は、内部通路１５の前端１５ａが液流通路１３の前端１３ａよりも少し後方に位置するように内部通路１５を形成した場合も同様に得られることは勿論である。   In the case of this valve body 10A, the following effects are obtained. That is, as shown in FIG. 6A, when the internal passage 10b is formed so that its front end position is located in front of the front end 13a of the liquid flow passage 13, the internal passage 10b is moved from the rear to the front. In order for the liquid flow indicated by the white arrow flowing toward the rear to collide with the surface 10c recessed on the front side existing at the front end of the internal passage 10b, it once returns to the rear side and exits from the liquid flow passage 13 to the front side. Stagnation occurs on the surface 10c and a large pressure loss occurs. On the other hand, in the case of the valve body 10A as shown in FIG. 6B, the internal passage 15 is formed so that the front end 15a thereof is located at the front end 13a of the liquid flow passage 13, and the internal passage 15 is formed from the front side. Since the convex portion 14 projecting rearward is formed on the facing surface, the liquid flow from the internal passage 15 toward the liquid flow passage 13 flows into the liquid flow passage 13 without stagnation in the internal passage 15 to reduce pressure loss. Can be. This pressure loss is reduced when the convex portion 14 is formed in a shape that is located on the rear side closer to the central portion of the internal passage 15 than in the case where the convex portion 14 is simply formed in a convex shape. It becomes possible to raise more by becoming smoother. Further, when the convex portion 14 is formed in the same axial center as the internal passage 15, the plurality of (four in the illustrated example) liquid flow passages 13 are guided with respect to the liquid flow passages 13 arranged evenly in the circumferential direction. It is possible to make the liquid flow condition uniform. Of course, the above effect can also be obtained when the internal passage 15 is formed so that the front end 15a of the internal passage 15 is located slightly behind the front end 13a of the liquid flow passage 13.

なお、内部通路１５を前側から臨む面に形成する凸部１４は、図４及び図５に示す例では、凸部１４の裾部分１４ａの直径を内部通路１５の直径よりも短い寸法に設定しているが、本発明はこれに限らない。例えば、裾部分１４ａの直径を内部通路１５の直径と等しい寸法、或いは内部通路１５の直径よりも著しく短い寸法に設定してもよい。また、凸部１４の形状は、内部通路１５の中心部に近づく程後側に位置する凸形状であれば、頂部分が丸い円錐台形状に限らない。例えば、頂部分が平らな円錐台形状、或いは円錐形状、或いは山の稜線に相当する傾斜部分が湾曲した或いは段階的に変化する階段状の円錐や円錐台形状などの種々の形態をとることも可能であり、更には、周方向の半径が異なる凸状とした形態をとることも可能である。   In the example shown in FIGS. 4 and 5, the convex portion 14 formed on the surface facing the internal passage 15 from the front side is set so that the diameter of the skirt portion 14 a of the convex portion 14 is shorter than the diameter of the internal passage 15. However, the present invention is not limited to this. For example, the diameter of the skirt portion 14 a may be set to a dimension that is equal to the diameter of the internal passage 15 or a dimension that is significantly shorter than the diameter of the internal passage 15. Moreover, if the shape of the convex part 14 is a convex shape located in the rear side so that the center part of the internal channel | path 15 is approached, it is not restricted to a truncated cone shape with a round top part. For example, it may take various forms such as a truncated cone shape having a flat top portion, a cone shape, or a stepped cone or a truncated cone shape in which an inclined portion corresponding to a ridge line of a mountain is curved or changes stepwise. Further, it is possible to adopt a convex shape with different radii in the circumferential direction.

本発明の一実施形態に係る２つの継ぎ手の両方を示す断面図である。It is sectional drawing which shows both of two joints which concern on one Embodiment of this invention. 弁体を斜め前方向から見た外観図である。It is the external view which looked at the valve body from diagonally forward. （ａ）は弁体を示す正面図、（ｂ）は正面断面図（（ｃ）のＢ−Ｂ線による断面図）、（ｃ）は（ａ）の右側面図、（ｄ）は（ａ）のＤ−Ｄ線による断面図である。(A) is a front view showing a valve body, (b) is a front sectional view (sectional view taken along line BB in (c)), (c) is a right side view of (a), and (d) is (a) It is sectional drawing by the DD line. 本発明の継ぎ手を構成する他の構成の弁体を示す図で、（ａ）はその弁体の正面図、（ｂ）は（ａ）の右側面図である。It is a figure which shows the valve body of the other structure which comprises the coupling of this invention, (a) is the front view of the valve body, (b) is a right view of (a). （ａ）は図４（ａ）におけるＥ−Ｅ線による断面図、図４（ｂ）におけるＦ−Ｆ線による断面図、（ｃ）は図４（ｂ）におけるＧ−Ｇ線による断面図である。4A is a cross-sectional view taken along line EE in FIG. 4A, a cross-sectional view taken along line FF in FIG. 4B, and FIG. 4C is a cross-sectional view taken along line GG in FIG. is there. （ａ）は図２及び図３に示す弁体を流れる液流の説明図、（ｂ）は図４及び図５に示す弁体を流れる液流の説明図である。(A) is explanatory drawing of the liquid flow which flows through the valve body shown in FIG.2 and FIG.3, (b) is explanatory drawing of the liquid flow which flows through the valve body shown in FIG.4 and FIG.5. 特許文献１の継ぎ手を示す断面図である。It is sectional drawing which shows the joint of patent document 1. FIG. 特許文献２の継ぎ手を示す断面図である。It is sectional drawing which shows the joint of patent document 2. FIG.

符号の説明Explanation of symbols

１、５０ 継ぎ手
２ 継ぎ手本体
３ 空洞
３ａ 円筒状内周面
４ 開口部
５ 弁座
１０、１０Ａ 弁体
１１、１１Ａ シール部
１２ 被案内部
１２ａ 被案内片
１３ 液流通路
１３ａ 液流通路の前端
１４ 凸部
１５ 内部通路
１５ａ 内部通路の前端
２０ 固定部材
２２ 金属管
２３ フレア部
３０ ナット（金属製の環状固着部材） DESCRIPTION OF SYMBOLS 1, 50 Joint 2 Joint main body 3 Cavity 3a Cylindrical inner peripheral surface 4 Opening part 5 Valve seat 10, 10A Valve body 11, 11A Sealing part 12 Guided part 12a Guided piece 13 Liquid flow path 13a Front end of liquid flow path 14 Convex part 15 Internal passage 15a Front end of internal passage 20 Fixing member 22 Metal tube 23 Flare part 30 Nut (metal annular fixing member)

Claims (8)

相手方の継ぎ手に向かう前方側を開口した軸方向に延びる空洞を有し、その開口部近傍の内周面に弁座が形成された継ぎ手本体と、この継ぎ手本体の前記空洞内に軸方向へ移動可能に装填され、前記弁座に対してその全周にわたり接触することにより液流通路を遮断するシール部を有した弁体とを備え、この弁体が、前記シール部が前記弁座に接触する閉弁位置と前記弁座から離れた開弁位置との間で移動可能に設けられた継ぎ手において、
前記継ぎ手本体は、前記弁座よりも後方側の位置に当該弁座の最大径よりも大きな内径をもつ円筒状内周面を有し、
前記弁体は、合成樹脂材料により成形され、前記シール部よりも後方側の位置に、当該シール部の最大径よりも大きな外径であって前記継ぎ手本体の円筒状内周面により軸方向に案内される外径をもつ被案内部を有し、この被案内部において前記シール部よりも径方向外側の位置に軸方向に延びる液流通路が形成されていることを特徴とする継ぎ手。 A joint body having an axially extending cavity opened on the front side toward the counterpart joint, and a valve seat formed on the inner peripheral surface in the vicinity of the opening, and moving in the axial direction into the cavity of the joint body And a valve body having a seal portion that blocks the liquid flow path by contacting the valve seat over the entire circumference thereof, and the valve body is in contact with the valve seat. A joint provided movably between a valve closing position and a valve opening position away from the valve seat;
The joint body has a cylindrical inner peripheral surface having an inner diameter larger than the maximum diameter of the valve seat at a position on the rear side of the valve seat,
The valve body is formed of a synthetic resin material, and has an outer diameter larger than the maximum diameter of the seal portion at a position rearward of the seal portion, and is axially formed by a cylindrical inner peripheral surface of the joint body. A joint having a guided portion having an outer diameter to be guided, wherein a liquid flow passage extending in the axial direction is formed at a position radially outside the seal portion in the guided portion. 請求項１に記載の継ぎ手において、
前記弁体のシール部は、その周方向に肉厚が均一な回転体形状に成形されていることを特徴とする継ぎ手。 The joint according to claim 1,
The joint according to claim 1, wherein the sealing portion of the valve body is formed into a rotating body shape having a uniform thickness in the circumferential direction. 請求項２に記載の継ぎ手において、
前記被案内部は、周方向に間欠的に並び、前記シール部の外周部から後方に向かって延びる複数の被案内片を有し、これら被案内片同士の間に前記液流通路が形成されていることを特徴とする継ぎ手。 The joint according to claim 2,
The guided portion has a plurality of guided pieces arranged intermittently in the circumferential direction and extending rearward from the outer peripheral portion of the seal portion, and the liquid flow passage is formed between the guided pieces. A joint characterized by 請求項３に記載の継ぎ手において、
前記複数の被案内片の内側には、該弁体の後端と前記シール部よりも後方側であって前記液流通路の前端又はその後方位置との間にわたり内部通路が上記液流通路に繋がる状態で形成され、かつ、弁体の上記内部通路を前側から臨む面には後方に向いて突出する凸部が形成されていることを特徴とする継ぎ手。 The joint according to claim 3,
Inside the plurality of guided pieces, an internal passage extends from the rear end of the valve body to the rear side of the seal portion and between the front end of the liquid flow passage or its rear position. A joint that is formed in a connected state, and has a convex portion that protrudes rearward on a surface of the valve body that faces the internal passage from the front side. 請求項４に記載の継ぎ手において、
前記凸部が前記内部通路の中心部に近づく程後側に位置する形状となっていることを特徴とする継ぎ手。 The joint according to claim 4,
A joint characterized in that the convex portion has a shape positioned on the rear side as it approaches the center of the internal passage. 請求項５に記載の継ぎ手において、
前記凸部が、周方向で同一半径としかつ前記内部通路と同一軸心状に形成されているとともに前記液流通路が周方向に均等に複数設けられていることを特徴とする継ぎ手。 The joint according to claim 5,
The joint is characterized in that the convex portion has the same radius in the circumferential direction and is formed in the same axial center as the internal passage, and a plurality of the liquid flow passages are provided equally in the circumferential direction. 請求項１乃至６のいずれかに記載の継ぎ手において、
前記空洞内には、前記円筒状内周面よりも後方の位置にその内周面が拡径された段差部が形成されるとともに、この段差部に後方から押付けられることにより前記空洞内に固定される金属固定部材と、この金属固定部材と前記弁体との間に介在することにより前記弁体を前方へ付勢するばねとを備えたことを特徴とする継ぎ手。 The joint according to any one of claims 1 to 6,
In the cavity, a stepped portion having an enlarged inner peripheral surface is formed at a position rearward of the cylindrical inner peripheral surface, and is fixed in the cavity by being pressed against the stepped portion from the rear. And a spring that biases the valve body forward by being interposed between the metal fixing member and the valve body. 請求項７に記載の継ぎ手において、
前記空洞の後方側の端部に、フレア部を有する金属管が内部に通された金属製の環状固着部材がねじ込まれ、そのねじ込み力によりフレア部が、前記金属固定部材に押付けられていることを特徴とする継ぎ手。 The joint according to claim 7,
A metal annular fixing member into which a metal tube having a flare portion is passed is screwed into an end portion on the rear side of the cavity, and the flare portion is pressed against the metal fixing member by the screwing force. Fitting characterized by.
JP2005099192A 2004-03-31 2005-03-30 Joint Pending JP2005315420A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011185434A (en) * 2010-02-12 2011-09-22 Sumitomo Rubber Ind Ltd Valve connection fitting and tire repairing kit using the same
US8109290B2 (en) 2006-09-20 2012-02-07 Smc Kabushiki Kaisha Pipe joint
WO2015137027A1 (en) * 2014-03-13 2015-09-17 ニッタ株式会社 Pipe joint
CN106885080A (en) * 2015-12-15 2017-06-23 重庆金宇恒科技有限公司 For the pipeline of circulating liquid
CN109458508A (en) * 2018-12-29 2019-03-12 宁波大雅汽车部件有限公司 A kind of quick-release connector of the sealing ring anti-drop structure of big flow low pressure drop

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5276731A (en) * 1975-12-22 1977-06-28 Sumitomo Heavy Ind Ltd Automatic pipe coupling means
JPS58130193U (en) * 1982-02-26 1983-09-02 株式会社新潟鐵工所 Emergency disconnection device for fluid handling lines
JPH01100987U (en) * 1987-09-01 1989-07-06
JPH11230451A (en) * 1998-02-16 1999-08-27 Hitachi Cable Ltd Metal fitting for hose and brake hose

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5276731A (en) * 1975-12-22 1977-06-28 Sumitomo Heavy Ind Ltd Automatic pipe coupling means
JPS58130193U (en) * 1982-02-26 1983-09-02 株式会社新潟鐵工所 Emergency disconnection device for fluid handling lines
JPH01100987U (en) * 1987-09-01 1989-07-06
JPH11230451A (en) * 1998-02-16 1999-08-27 Hitachi Cable Ltd Metal fitting for hose and brake hose

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8109290B2 (en) 2006-09-20 2012-02-07 Smc Kabushiki Kaisha Pipe joint
DE102007044154B4 (en) * 2006-09-20 2013-01-17 Smc K.K. pipe connectors
JP2011185434A (en) * 2010-02-12 2011-09-22 Sumitomo Rubber Ind Ltd Valve connection fitting and tire repairing kit using the same
WO2015137027A1 (en) * 2014-03-13 2015-09-17 ニッタ株式会社 Pipe joint
JPWO2015137027A1 (en) * 2014-03-13 2017-04-06 ニッタ株式会社 Pipe fitting
CN106885080A (en) * 2015-12-15 2017-06-23 重庆金宇恒科技有限公司 For the pipeline of circulating liquid
CN109458508A (en) * 2018-12-29 2019-03-12 宁波大雅汽车部件有限公司 A kind of quick-release connector of the sealing ring anti-drop structure of big flow low pressure drop
CN109458508B (en) * 2018-12-29 2023-08-25 宁波大雅汽车部件有限公司 Quick-change connector of sealing ring anti-drop structure with high flow and low pressure drop

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