JP6637647B2 - Pipe fittings - Google Patents

Pipe fittings Download PDF

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JP6637647B2
JP6637647B2 JP2014118012A JP2014118012A JP6637647B2 JP 6637647 B2 JP6637647 B2 JP 6637647B2 JP 2014118012 A JP2014118012 A JP 2014118012A JP 2014118012 A JP2014118012 A JP 2014118012A JP 6637647 B2 JP6637647 B2 JP 6637647B2
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locking member
pipe
cylindrical portion
pipe joint
locking
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JP2015230089A (en
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智明 柏又
智明 柏又
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Bridgestone Corp
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Bridgestone Corp
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Description

本発明は、管継手に関するものである。   The present invention relates to a pipe joint.

パイプなどの管体をワンタッチで接続させるのに、ロック爪を用いた管継手が知られている（例えば、特許文献１参照）。当該ロック爪は、内圧により管継手から抜出る方向に管体が移動するに伴い、管体にロック爪が食込むことにより管体を係止し、管体の管継手からの離脱が防がれる。   A pipe joint using a lock claw for connecting a pipe such as a pipe with one touch is known (for example, see Patent Document 1). The lock claw locks the pipe body as the pipe moves in the direction of being pulled out of the pipe joint due to internal pressure, and the lock claw bites into the pipe body to prevent the pipe body from being detached from the pipe joint. It is.

特開２０１１−１３７５２５号公報JP 2011-137525 A

しかしながら、特許文献１で提案されているような、ロック爪を用いた管継手では、例えば管体に接続されるバルブの開閉などによる内圧の変動により、管体へのロック爪の食込みと食込みの緩和が生じてロック爪が繰返し弾性変形し、ロック爪が比較的早期に破壊され、寿命が短縮するおそれがある。   However, in a pipe joint using a lock claw as proposed in Patent Literature 1, the lock claw bites into the pipe and the bite of the bite is cut into the pipe due to a change in internal pressure due to, for example, opening and closing of a valve connected to the pipe. The lock claw is repeatedly elastically deformed due to relaxation, and the lock claw is destroyed relatively early, which may shorten the life.

したがって、かかる事情に鑑みてなされた本発明は、挿入される管体を係止する係止部材の寿命を長期化する管継手を提供することを目的とする。   Accordingly, an object of the present invention, which has been made in view of such circumstances, is to provide a pipe joint that extends the life of a locking member that locks a pipe to be inserted.

上述した諸課題を解決すべく、本発明の管継手は、挿入される管体の外周面に密接して前記管体の内部を密封するシール部材と、該管体の外表面に係合し得る爪部を有し弾性変形可能な係止部材と、該シール部材および該係止部材の間に設けられるリング部材とを備える管継手であって、前記シール部材側とは逆側への前記係止部材の軸方向の移動を制限する制限部材を、更に備え、前記係止部材は、前記リング部材および前記制限部材の間に挟持され、前記リング部材は前記管継手の軸方向に移動可能であり、前記管体に所定値以上の内圧が付加されたときに、前記リング部材が前記係止部材側に移動し、前記リング部材は、円筒部位と、該円筒部位の一端に設けられ、該円筒部位の内径よりも径方向内側に突出する第１の当接部位と、該円筒部位の他端に設けられ、該円筒部位から離間する方向に向かって内径がテーパー状に拡径し、外径がテーパー状に縮径する第２の当接部位とを有し、前記係止部材の軸方向に沿った断面は横向きのＶ字形状であることを特徴とする。本発明の管継手によれば、係止部材の寿命が長期化される。 In order to solve the above-described problems, a pipe joint according to the present invention includes a sealing member that seals the inside of the tubular body in close contact with an outer peripheral surface of the inserted tubular body, and a seal member that engages with an outer surface of the tubular body. A pipe joint comprising an elastically deformable locking member having a claw portion to be obtained, and a ring member provided between the sealing member and the locking member, wherein the pipe member is provided on a side opposite to the sealing member side. A restricting member that restricts axial movement of the locking member, wherein the locking member is sandwiched between the ring member and the restriction member, and the ring member is movable in the axial direction of the pipe joint. When an internal pressure equal to or more than a predetermined value is applied to the tube, the ring member moves toward the locking member, and the ring member is provided at one end of the cylindrical portion and the cylindrical portion, A first contact portion that projects radially inward from the inner diameter of the cylindrical portion; A second contact portion provided at the other end of the cylindrical portion, the inner diameter of which increases in a tapered shape in the direction away from the cylindrical portion, and the outer diameter of which decreases in a tapered shape; The cross-section along the axial direction of the stop member has a laterally V-shaped shape. According to the pipe joint of the present invention, the life of the locking member is prolonged.

また、本発明の管継手では、前記制限部材は前記係止部材の変形を制限し、前記管体に前記所定値以上の内圧が付加されたときに、前記リング部材の前記第２の当接部位の外径テーパー形状の部位が前記係止部材のＶ字形状の外周側の部位に当接し、前記係止部材の屈曲部が前記制限部材と当接することが好ましい。このような構成によれば、係止部材の寿命がいっそう長期化される。
Further, in the pipe joint of the present invention, the restricting member restricts deformation of the locking member, and when the internal pressure equal to or more than the predetermined value is applied to the tubular body, the second contact of the ring member. site of the outer diameter tapered portion abuts a portion of the outer peripheral side of the V-shape of the locking member, it is preferable that the bent portion of the front Kigakaritome member comes into contact with the restriction member. According to such a configuration, the life of the locking member is further lengthened.

上記のように構成された本発明によれば、挿入される管体を係止する係止部材の寿命を長期化する管継手を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention comprised as mentioned above, the pipe joint which lengthens the life of the locking member which locks the inserted pipe can be provided.

本発明の一実施形態に係る管継手を、管体を挿入した状態で示す、管継手の軸方向に沿った半裁断面図である。FIG. 3 is a half sectional view of the pipe joint according to an embodiment of the present invention, with the pipe body inserted, along an axial direction of the pipe joint. 図１の管継手を分解した、軸方向に沿った半裁断面図である。FIG. 2 is an exploded half sectional view taken along an axial direction of the pipe joint of FIG. 1. 図１の管継手を、管体に所定値以上の内圧が付加された状態で示す、管継手の軸方向に沿った半裁断面図である。FIG. 2 is a half-sectional view along the axial direction of the pipe joint, showing the pipe joint of FIG. 1 in a state where an internal pressure equal to or more than a predetermined value is applied to a pipe body.

以下、本発明の実施形態について、図面を参照して例示説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

まず、本発明の一実施形態に係る管継手について説明する。図１は、本実施形態に係る管継手の、軸方向に沿った半裁断面図である。管継手１０の軸方向ＡＤに沿って、接続すべき給水・給湯配管用のパイプなどの管体１１が挿入されると、管継手１０は、管体１１内部を密封しながら管体１１に接続する。   First, a pipe joint according to an embodiment of the present invention will be described. FIG. 1 is a half sectional view of the pipe joint according to the present embodiment, taken along an axial direction. When a pipe 11 such as a pipe for water / hot water supply piping to be connected is inserted along the axial direction AD of the pipe joint 10, the pipe joint 10 is connected to the pipe 11 while sealing the inside of the pipe 11. I do.

図１に示すように、本実施形態の管継手１０は、本体部１２、制限部材１３、シール部材１４、リング部材１５、係止部材１６、および解放部材１７を含んで構成されている。   As shown in FIG. 1, the pipe joint 10 of the present embodiment includes a main body 12, a restriction member 13, a seal member 14, a ring member 15, a locking member 16, and a release member 17.

本体部１２は、例えば樹脂製または砲金製、青銅製とすることができ、図２に示すように、円筒部位１８を有している。
円筒部位１８の内周側には、第１の座面１９および第２の座面２０が設けられている。第２の座面２０は、第１の座面１９よりも開口側に設けられている。第１の座面１９および第２の座面２０は環状となっている。第１の座面１９の内径は、第２の座面２０の内径より小さくなっている。
円筒部位１８の外周側には、第３の座面２１および少なくとも一つの係合部位２２が設けられている。第３の座面２１は環状となっている。係合部位２２は第３の座面２１よりも開口側に設けられている。係合部位２２は環状であり、係合部位２２の軸方向ＡＤにおける開口側は、当該開口に向かってテーパー状に縮径しており、係合部位２２の開口側の逆側は軸方向に垂直な平面状となっている。 The main body 12 can be made of, for example, resin, gunmetal, or bronze, and has a cylindrical portion 18 as shown in FIG.
A first seat surface 19 and a second seat surface 20 are provided on the inner peripheral side of the cylindrical portion 18. The second seating surface 20 is provided closer to the opening than the first seating surface 19. The first seat surface 19 and the second seat surface 20 are annular. The inner diameter of the first seat surface 19 is smaller than the inner diameter of the second seat surface 20.
A third seat surface 21 and at least one engagement portion 22 are provided on the outer peripheral side of the cylindrical portion 18. The third seating surface 21 is annular. The engagement portion 22 is provided closer to the opening than the third seating surface 21. The engaging portion 22 is annular, and the opening side in the axial direction AD of the engaging portion 22 is tapered toward the opening, and the opposite side of the opening side of the engaging portion 22 is in the axial direction. It is a vertical plane.

制限部材１３は、例えば樹脂製とすることができ、全体的に円筒状である。
制限部材１３の一端側の一部である第１の部分２３の内周側には、本体部１２の係合部位２２に係合する溝状部位２４が形成されている。本実施形態では、本体部１２の円筒部位１８を制限部材１３に挿入すると、円筒部位１８の係合部位２２と制限部材１３の溝状部位２４とが係合し、また、制限部材１３の端面が円筒部位１８の第３の座面２１に当接し、その結果、制限部材１３が軸方向に変位不能に支持されるようになっている。
なお、本体部１２の円筒部位１８と、制限部材１３の第１の部分２３とが、互いに螺合する構造とされていてもよい。
制限部材１３の軸方向に沿って第１の部分２３に連続する、第２の部分２５の内径は、一定となっている。制限部材１３の軸方向に沿って第２の部分２５に連続する、第３の部分２６の内径は、第２の部分２５から離間する方向に向かってテーパー状に縮径している。制限部材１３の軸方向に沿って第３の部分２６に連続する、第４の部分２７の内径は、一定となっている。制限部材１３の軸方向に沿って第４の部分２７に連続する、第５の部分２８は、制限部材１３の他端を含む部分である。第５の部分２８の内径は、第４の部分２７の内径より小さくなっている。 The restriction member 13 can be made of, for example, a resin, and is entirely cylindrical.
On the inner peripheral side of the first portion 23 which is a part of one end of the restricting member 13, a groove-shaped portion 24 that engages with the engaging portion 22 of the main body 12 is formed. In the present embodiment, when the cylindrical portion 18 of the main body 12 is inserted into the restricting member 13, the engaging portion 22 of the cylindrical portion 18 engages with the groove-shaped portion 24 of the restricting member 13. Abuts against the third seating surface 21 of the cylindrical portion 18, and as a result, the restricting member 13 is supported so as not to be displaceable in the axial direction.
Note that the cylindrical portion 18 of the main body 12 and the first portion 23 of the restricting member 13 may be configured to be screwed together.
The inner diameter of the second portion 25, which is continuous with the first portion 23 along the axial direction of the restriction member 13, is constant. The inner diameter of the third portion 26, which is continuous with the second portion 25 along the axial direction of the restriction member 13, is tapered in a direction away from the second portion 25. The inner diameter of the fourth portion 27, which is continuous with the third portion 26 along the axial direction of the restriction member 13, is constant. The fifth portion 28, which is continuous with the fourth portion 27 along the axial direction of the restriction member 13, is a portion including the other end of the restriction member 13. The inner diameter of the fifth part 28 is smaller than the inner diameter of the fourth part 27.

シール部材１４は、例えばＯリングであって、本体部１２の円筒部位１８に挿入される前の状態で、外径は円筒部位１８の内径より僅かに大きくなっている。シール部材１４は、本体部１２の円筒部位１８の内部に収容されており、第２の座面２０に当接され得る。シール部材１４は、本体部１２の円筒部材１８の内周面と、挿入される管体１１の外周面とに密接して、円筒部位１８および管体１１の内部を密封、内部が液体で満たされる場合には止水する。   The seal member 14 is, for example, an O-ring, and has an outer diameter slightly larger than an inner diameter of the cylindrical portion 18 before being inserted into the cylindrical portion 18 of the main body 12. The seal member 14 is housed inside the cylindrical portion 18 of the main body 12 and can abut on the second seating surface 20. The seal member 14 is in close contact with the inner peripheral surface of the cylindrical member 18 of the main body 12 and the outer peripheral surface of the inserted tube 11, and seals the inside of the cylindrical portion 18 and the tube 11, and the inside is filled with liquid. If water is stopped, stop the water.

リング部材１５は、例えば樹脂製とすることができ、円筒部位２９、第１の当接部位３０、および第２の当接部位３１からなっている。リング部材１５の円筒部位２９の外径は本体部１２の円筒部位１８の内径と実質的に等しい、または僅かに小さくなっている。第１の当接部位３０はリング部材１５の円筒部位２９の一端に設けられ、第２の当接部位３１は他端に設けられている。第１の当接部位３０は、リング部材１５の円筒部位２９を本体部１２の円筒部位１８に挿入した状態で、シール部材１４に当接可能である。即ち、本実施形態では、リング部材１５は、管体１１が管継手１０内に挿入され流体内圧が付加された際に、本体部１２との間でシール部材１４を一定の位置に保持するという、基本的な機能を果たす。第２の当接部位３１は、リング部材１５の円筒部位２９から離間する方向に向かって内径がテーパー状に拡径し、外径がテーパー状に縮径している。なお、第２の当接部位３１の最大外径は制限部材１３の第２の部分２５の内径以下とされている。第２の当接部位３１は、係止部材１６に当接可能である。   The ring member 15 can be made of, for example, resin and includes a cylindrical portion 29, a first contact portion 30, and a second contact portion 31. The outer diameter of the cylindrical portion 29 of the ring member 15 is substantially equal to or slightly smaller than the inner diameter of the cylindrical portion 18 of the main body 12. The first contact portion 30 is provided at one end of the cylindrical portion 29 of the ring member 15, and the second contact portion 31 is provided at the other end. The first contact portion 30 can contact the seal member 14 in a state where the cylindrical portion 29 of the ring member 15 is inserted into the cylindrical portion 18 of the main body 12. That is, in the present embodiment, the ring member 15 holds the seal member 14 at a fixed position between itself and the main body 12 when the pipe body 11 is inserted into the pipe joint 10 and an internal fluid pressure is applied. Performs basic functions. The inner diameter of the second contact portion 31 increases in a tapered shape in the direction away from the cylindrical portion 29 of the ring member 15, and the outer diameter decreases in a tapered shape. The maximum outer diameter of the second contact portion 31 is equal to or smaller than the inner diameter of the second portion 25 of the restriction member 13. The second contact portion 31 can contact the locking member 16.

係止部材１６は、弾性を有する素材、例えばステンレスにより全体的に環状に形成され、外径は制限部材１３の第２の部分２５の内径より小さく且つ第４の部分２７の内径よりは大きくなっている。係止部材１６を軸方向に沿って切断した断面は、横向きのＶ字形状となっている。係止部材１６の内周側のＶ字形状の先端部は、爪部３２を構成している。係止部材１６の断面のＶ字の屈曲側から、係止部材１６の環状の内周側に管体１１を押込むと、爪部３２が径方向外側に広がるように弾性変形して、管体１１が挿入され得る。一方、係止部材１６の断面のＶ字の屈曲側に管体１１を引張ると、爪部３２が管体１１の外表面に係合、例えば、外径が一様な管体１１の外表面への爪部３２の食込み、または、管体１１の外周面に形成された環状の溝への爪部３２の掛合せにより管体１１の係止部材１６からの離脱が防がれる。   The locking member 16 is made of an elastic material, for example, stainless steel, and has a generally annular shape. The outer diameter of the locking member 16 is smaller than the inner diameter of the second portion 25 of the restricting member 13 and larger than the inner diameter of the fourth portion 27. ing. The cross section of the locking member 16 cut along the axial direction has a laterally V-shaped shape. The V-shaped tip on the inner peripheral side of the locking member 16 forms a claw portion 32. When the tube 11 is pushed into the annular inner peripheral side of the locking member 16 from the V-shaped bent side of the cross section of the locking member 16, the claw portion 32 is elastically deformed to spread radially outward, and The body 11 can be inserted. On the other hand, when the tube 11 is pulled to the V-shaped bent side of the cross section of the locking member 16, the claw portion 32 engages with the outer surface of the tube 11, for example, the outer surface of the tube 11 having a uniform outer diameter. The engagement of the claw 32 with an annular groove formed on the outer peripheral surface of the tube 11 prevents the engagement of the claw 32 with the annular member formed on the outer peripheral surface of the tube 11, thereby preventing the tube 11 from being detached from the locking member 16.

解放部材１７は、例えば樹脂製とすることができ、円筒部位３３およびテーパー部位３４からなっている。円筒部位３３およびテーパー部位３４は、連続する、同一の内径であり、管体１１を挿入可能な孔を有している。解放部材１７の円筒部位３３の外径は、制限部材１７の第５の部分２８の内径と実質的に等しい、または僅かに小さくなっている。解放部材１３のテーパー部位３４の外径は、解放部材１７の端から軸方向に沿った中心に向かって拡径するテーパー状であって、テーパー部位３４の最大外径は、制限部材１３の第５の部分２８の内径より大きく、且つ、第４の部分２７の内径と実質的に等しい、または、僅かに小さくなっている。解放部材１７は、係止部材１６の爪部３２にテーパー部位３４を圧入することにより、爪部３２を係止部材１６の径方向外側に広げ、爪部３２の管体１１への係合を解放する。   The release member 17 can be made of, for example, resin, and includes a cylindrical portion 33 and a tapered portion 34. The cylindrical portion 33 and the tapered portion 34 are continuous, have the same inner diameter, and have holes through which the tube 11 can be inserted. The outer diameter of the cylindrical portion 33 of the release member 17 is substantially equal to or slightly smaller than the inner diameter of the fifth portion 28 of the restriction member 17. The outer diameter of the tapered portion 34 of the release member 13 is a tapered shape that increases in diameter from the end of the release member 17 toward the center along the axial direction, and the maximum outer diameter of the tapered portion 34 is The inner diameter of the fifth portion 28 is larger than and substantially equal to or slightly smaller than the inner diameter of the fourth portion 27. The release member 17 expands the claw portion 32 radially outward of the locking member 16 by press-fitting the tapered portion 34 into the claw portion 32 of the locking member 16, and engages the claw portion 32 with the tube 11. release.

上述の管継手１０は、以下の工程で組立てられる。まず、本体部１２の円筒部位１８の内部にシール部材１４が圧入される。次に、リング部材１５の円筒部位２９が、第１の当接部位３０側から、本体部１２の円筒部位１８の内部に挿入される。また、解放部材１７の円筒部位３３が、制限部材１３の第１の部分２３側から、制限部材１３の第５の部分２８の内部に挿入される。次に、制限部材１３の第１の部分２３側から、係止部材１６が、断面のＶ字の屈曲側を制限部材１３内の解放部材１７側に向かせた状態で、制限部材１３の内部に、解放部材１７とともに並置される。次に、制限部材１３の内部に、制限部材１３の第１の部分２３側から、本体部１２の円筒部位１８が、制限部材１３の溝状部位２４が本体部１２の係合部位２２に係合するまで、圧入される。   The above-described pipe joint 10 is assembled in the following steps. First, the seal member 14 is press-fitted into the cylindrical portion 18 of the main body 12. Next, the cylindrical portion 29 of the ring member 15 is inserted into the cylindrical portion 18 of the main body 12 from the first contact portion 30 side. Further, the cylindrical portion 33 of the release member 17 is inserted into the fifth portion 28 of the restriction member 13 from the first portion 23 side of the restriction member 13. Next, from the side of the first portion 23 of the restricting member 13, the locking member 16 is positioned inside the restricting member 13 with the bent side of the V-shaped cross section facing the release member 17 in the restricting member 13. , Together with the release member 17. Next, inside the restricting member 13, the cylindrical portion 18 of the main body 12 and the groove-shaped portion 24 of the restricting member 13 are engaged with the engaging portion 22 of the main body 12 from the first portion 23 side of the restricting member 13. Press in until it fits.

上述のように組立てられた本実施形態の管継手１０において、リング部材１５は、本体部１２および制限部材１３の何れとも別体とされ、またそれらのいずれにも固定されておらず、シール部材１４および係止部材１６の間において、本体部１２すなわち管継手１０の軸方向に移動可能となっている。また、解放部材１７は、テーパー部位３４が制限部材１３の第４の部分２７および第５の部分２８の間の段部３５によって係止するまで、制限部材１３の第５の部分２８側に、管継手１０の軸方向に移動可能となっている。また、リング部材１５が最も本体部１２側に位置し、かつ、解放部材１７が最も制限部材１３の第５の部分２８側の端側に位置しているとき、係止部材１６は管継手１０の軸方向に沿って移動または変形可能となっている。   In the pipe joint 10 of the present embodiment assembled as described above, the ring member 15 is separate from any of the main body 12 and the restricting member 13, and is not fixed to any of them, and the sealing member Between the locking member 14 and the locking member 16, the main body 12, that is, the pipe joint 10 is movable in the axial direction. Further, the release member 17 is provided on the fifth portion 28 side of the restricting member 13 until the tapered portion 34 is locked by the step 35 between the fourth portion 27 and the fifth portion 28 of the restricting member 13. The pipe joint 10 can be moved in the axial direction. When the ring member 15 is located closest to the main body 12 and the release member 17 is located closest to the end of the restricting member 13 on the fifth portion 28 side, the locking member 16 is Can be moved or deformed along the axial direction.

上述のような構成の管継手１０に、管体１１の端が本体部１２の第１の座面１９に当接するまで、管体１１を挿入すると、図１に示すように、シール部材１４は管体１１と連動して、本体部１２の第２の座面２０に当接する位置に変位する。管継手１０に管体１１が接続された状態で、例えば管体１１内に水などの流体が導入され、当該流体の内圧が管体１１に付加されると、当該内圧により管継手１０から管体１１を引抜く力がかかる。
管体１１が管継手１０から引抜き方向に変位すると、図３に示すように、管体１１の外表面に係合した係止部材１６が、管体１１に連動して管体１１の引抜き方向に移動する。係止部材１６が制限部材１３の第３の部分２６に当接すると、係止部材１６のそれ以上の移動が制限される。係止部材１６の移動の制限により、係止部材１６に係合した管体１１の、管継手１０からの離脱が防がれる。
また、所定値以上の内圧が管体１１に付加されると、部材間の僅かな隙間を介してシール部材１４に直接及ぼされる上記引抜き方向の流体の内圧によりシール部材１４もリング部材１５側に押圧され、リング部材１５を係止部材１６側に押圧して、ともに移動する。なお、本実施形態では、所定値は、例えば、シール部材１４と本体部１２の円筒部位１８および管体１１の少なくとも一方との間の最大静止摩擦力に相当する圧力値である。シール部材１４が一旦移動すると、管体１１の内圧が所定値未満に低下しても、シール部材１４と本体部１２の円筒部位１８および管体１１との間の摩擦力により、シール部材１４およびリング部材１５は移動したままの位置に留まり得る。係止部材１６側に移動したリング部材１５は、係止部材１６に当接し得る。 When the pipe body 11 is inserted into the pipe joint 10 having the above-described configuration until the end of the pipe body 11 comes into contact with the first seating surface 19 of the main body portion 12, as shown in FIG. In conjunction with the pipe 11, the main body 12 is displaced to a position where it comes into contact with the second seating surface 20. In a state where the pipe 11 is connected to the pipe fitting 10, for example, a fluid such as water is introduced into the pipe 11, and when the internal pressure of the fluid is applied to the pipe 11, the pipe from the pipe fitting 10 is caused by the internal pressure. A force to pull out the body 11 is applied.
When the pipe 11 is displaced from the pipe joint 10 in the pulling direction, as shown in FIG. 3, the locking member 16 engaged with the outer surface of the pipe 11 is moved in conjunction with the pipe 11 in the pulling direction of the pipe 11. Go to When the locking member 16 contacts the third portion 26 of the restriction member 13, further movement of the locking member 16 is restricted. By restricting the movement of the locking member 16, the detachment of the pipe 11 engaged with the locking member 16 from the pipe joint 10 is prevented.
Further, when an internal pressure equal to or more than a predetermined value is applied to the pipe body 11, the seal member 14 also moves toward the ring member 15 due to the internal pressure of the fluid in the drawing direction directly applied to the seal member 14 through a slight gap between the members. When pressed, the ring member 15 is pressed toward the locking member 16 and moves together. In the present embodiment, the predetermined value is, for example, a pressure value corresponding to the maximum static friction force between the seal member 14 and at least one of the cylindrical portion 18 of the main body 12 and the tube 11. Once the seal member 14 moves, even if the internal pressure of the tube 11 drops below a predetermined value, the frictional force between the seal member 14 and the cylindrical portion 18 of the main body 12 and the tube 11 causes the seal member 14 and the Ring member 15 may remain in the moved position. The ring member 15 moved to the locking member 16 side can abut on the locking member 16.

このような構成によれば、所定値以上の内圧が管体１１内に付加されたときに、リング部材１５が係止部材１６側に移動するので、リング部材１５および制限部材１３の間の空間が小さくなる。リング部材１５および制限部材１３の間の空間が小さくなると、係止部材１６が弾性変形する空間が狭められる。その結果、管体１１の内圧の変動による、係止部材１６に生じる弾性変形の変形量が抑制されるので、繰返しの弾性変形による係止部材１６の疲労が緩和される。係止部材１６の疲労の緩和により、係止部材１６の寿命が長期化される。   According to such a configuration, when an internal pressure equal to or more than a predetermined value is applied to the inside of the tubular body 11, the ring member 15 moves toward the locking member 16, so that the space between the ring member 15 and the restriction member 13 is provided. Becomes smaller. When the space between the ring member 15 and the restriction member 13 is reduced, the space where the locking member 16 is elastically deformed is reduced. As a result, the amount of elastic deformation that occurs in the locking member 16 due to the variation in the internal pressure of the tube 11 is suppressed, so that fatigue of the locking member 16 due to repeated elastic deformation is reduced. By alleviating the fatigue of the locking member 16, the life of the locking member 16 is prolonged.

また、本実施形態では、管体１１に所定値以上の内圧が付加されたときに、リング部材１５が係止部材１６に当接するまで上記引抜き方向に移動可能とされている。すなわち、本実施形態によれば、上述のような構成により、管体１１に所定値以上の内圧が付加されたときに、係止部材１６がリング部材１５および制限部材１３に当接するので、係止部材１６は少なくともリング部材１５と制限部材１３との間に挟持されることになり、係止部材１６の弾性変形量がいっそう抑制される。したがって、係止部材１６の寿命がいっそう長期化される。 Further, in the present embodiment, when an internal pressure equal to or more than a predetermined value is applied to the tube 11, the ring member 15 can be moved in the pulling-out direction until the ring member 15 comes into contact with the locking member 16. That is, according to the present embodiment, the locking member 16 abuts on the ring member 15 and the limiting member 13 when the internal pressure equal to or more than the predetermined value is applied to the pipe body 11 by the above-described configuration. The stop member 16 is sandwiched at least between the ring member 15 and the restriction member 13, so that the amount of elastic deformation of the lock member 16 is further suppressed. Therefore, the life of the locking member 16 is further extended.

１０ 管継手
１１ 管体
１２ 本体部
１３ 制限部材
１４ シール部材
１５ リング部材
１６ 係止部材
１７ 解放部材
１８ 円筒部位
１９ 第１の座面
２０ 第２の座面
２１ 第３の座面
２２ 係合部位
２３ 第１の部分
２４ 溝状部位
２５ 第２の部分
２６ 第３の部分
２７ 第４の部分
２８ 第５の部分
２９ 円筒部位
３０ 第１の当接部位
３１ 第２の当接部位
３２ 爪部
３３ 円筒部位
３４ テーパー部位
３５ 段部
ＡＤ 軸方向 DESCRIPTION OF SYMBOLS 10 Fitting 11 Pipe 12 Main body 13 Restriction member 14 Seal member 15 Ring member 16 Locking member 17 Release member 18 Cylindrical part 19 First seat surface 20 Second seat surface 21 Third seat surface 22 Engagement site 23 First part 24 Groove part 25 Second part 26 Third part 27 Fourth part 28 Fifth part 29 Cylindrical part 30 First contact part 31 Second contact part 32 Claw part 33 Cylindrical part 34 Tapered part 35 Step AD axis direction

Claims (2)

挿入される管体の外周面に密接して前記管体の内部を密封するシール部材と、該管体の外表面に係合し得る爪部を有し弾性変形可能な係止部材と、該シール部材および該係止部材の間に設けられるリング部材とを備える管継手であって、
前記シール部材側とは逆側への前記係止部材の軸方向の移動を制限する制限部材を、更に備え、
前記係止部材は、前記リング部材および前記制限部材の間に挟持され、
前記リング部材は前記管継手の軸方向に移動可能であり、
前記管体に所定値以上の内圧が付加されたときに、前記リング部材が前記係止部材側に移動し、
前記リング部材は、円筒部位と、該円筒部位の一端に設けられ、該円筒部位の内径よりも径方向内側に突出する第１の当接部位と、該円筒部位の他端に設けられ、該円筒部位から離間する方向に向かって内径がテーパー状に拡径し、外径がテーパー状に縮径する第２の当接部位とを有し、
前記係止部材の軸方向に沿った断面は横向きのＶ字形状である、ことを特徴とする管継手。 A sealing member that is in close contact with the outer peripheral surface of the inserted tubular body and seals the inside of the tubular body; an elastically deformable locking member having a claw that can engage with the outer surface of the tubular body; A pipe joint comprising a seal member and a ring member provided between the locking members,
A limiting member that limits axial movement of the locking member to a side opposite to the seal member side,
The locking member is sandwiched between the ring member and the limiting member,
The ring member is movable in an axial direction of the pipe joint,
When an internal pressure equal to or greater than a predetermined value is applied to the pipe, the ring member moves toward the locking member,
The ring member is provided at a cylindrical portion, at one end of the cylindrical portion, a first contact portion protruding radially inward from an inner diameter of the cylindrical portion, and provided at the other end of the cylindrical portion, A second contact portion having an inner diameter that increases in a tapered shape in a direction away from the cylindrical portion and an outer diameter that is reduced in a tapered shape;
A cross-section along the axial direction of the locking member has a V-shape in a lateral direction. 前記制限部材は、前記係止部材の変形を制限し、
前記管体に前記所定値以上の内圧が付加されたときに、前記リング部材の前記第２の当接部位の外径テーパー形状の部位が前記係止部材のＶ字形状の外周側の部位に当接し、前記係止部材の屈曲部が前記制限部材と当接する、請求項１に記載の管継手。 The limiting member limits the deformation of the locking member,
When an internal pressure equal to or more than the predetermined value is applied to the pipe, the outer diameter tapered portion of the second contact portion of the ring member is positioned on the V-shaped outer peripheral side of the locking member. abuts, contacts the bent portion and the restriction member before Kigakaritome member, the pipe joint according to claim 1.
JP2014118012A 2014-06-06 2014-06-06 Pipe fittings Expired - Fee Related JP6637647B2 (en)

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DE3508296C2 (en) * 1985-03-08 1987-01-29 Agintec AG, Pfäffikon Pipe connection
JPH08277982A (en) * 1995-04-04 1996-10-22 Kyoei Sangyo Kk Flareless type pipe joint
JP2008111531A (en) * 2006-10-31 2008-05-15 Bridgestone Flowtech Corp Pipe fitting lock ring and pipe fitting
JP5778386B2 (en) * 2009-12-28 2015-09-16 株式会社ブリヂストン Lock ring for pipe joint, pipe joint, and manufacturing method of lock ring for pipe joint
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