JP2016118235A

JP2016118235A - Pipe joint

Info

Publication number: JP2016118235A
Application number: JP2014257476A
Authority: JP
Inventors: 文雄今市; Fumio Imaichi
Original assignee: Bridgestone Corp
Current assignee: Bridgestone Corp
Priority date: 2014-12-19
Filing date: 2014-12-19
Publication date: 2016-06-30
Anticipated expiration: 2034-12-19
Also published as: JP6654801B2

Abstract

PROBLEM TO BE SOLVED: To provide a pipe joint capable of suppressing generation of burr in pressing spherical bodies in through holes, and easily attaching and detaching a male joint and a female joint.SOLUTION: A pipe joint 10 includes a male joint 12, and a female joint 14 on which a recessed insertion portion 28 for inserting the male joint 12 from an axial one end side, is formed, and further through holes 42 including hole walls 42A expanded from an inner peripheral side toward an outer peripheral side, are arranged in a circumferential direction. In the through holes 42, spherical bodies 48 for fixing the male joint 12 to the recessed insertion portion 28 by being engaged with a recessed portion 18 of the male joint 12 are disposed. A collar 26 for supporting the spherical bodies 48 from a radial outer side of the female joint 14 is externally mounted on the female joint 14. The through holes 42 are provided with cutoff portions 42B formed by cutting off corner portions formed at an axial one end side of the female joint 14 at an inner peripheral side of the hole walls 42A.SELECTED DRAWING: Figure 3

Description

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

従来から、一方の配管と他方の配管を組み付ける際にコネクタを用いて接続を行っている。 Conventionally, connection is performed using a connector when assembling one pipe and the other pipe.

下記特許文献１には、筒状のプラグ（雄継手）と、このプラグが差し込まれる筒状のソケット（雌継手）と、を備えたクイックコネクタ（迅速継手）が開示されている。このクイックコネクタでは、ソケットの周囲にスライダが外装されており、スライダの内側では、ソケットに硬球収容孔が形成されている。スライダで硬球収容孔内に収容された硬球がプラグの凹部から抜けないように拘束されることで、プラグとソケットとの連結状態が保持されている。 Patent Document 1 below discloses a quick connector (quick joint) including a cylindrical plug (male joint) and a cylindrical socket (female joint) into which the plug is inserted. In this quick connector, a slider is packaged around the socket, and a hard ball housing hole is formed in the socket inside the slider. The hard ball accommodated in the hard ball accommodating hole is restrained by the slider so as not to come out of the concave portion of the plug, so that the connected state of the plug and the socket is maintained.

特開平１１−２１８２８３号公報JP-A-11-218283

上記した迅速継手のような管継手では、内圧による力を、硬球に接する雄継手と、雌継手と、スライダとで保持している。しかしながら、高圧の繰り返し入力にさらされると、雌継手の硬球収容孔における硬球の保持部分が内周面側に変形し、硬球収容孔から半径方向内側に突出するバリが発生する可能性がある。このため、管継手の脱着時に、雌継手のバリが雄継手の外周面や凹部に引っ掛かり、雄継手と雌継手との脱着が困難になるおそれがある。 In a pipe joint such as the quick joint described above, a force due to internal pressure is held by a male joint, a female joint, and a slider that are in contact with a hard ball. However, when exposed to repeated high pressure, there is a possibility that the holding portion of the hard ball in the hard ball housing hole of the female joint is deformed to the inner peripheral surface side, and a burr protruding radially inward from the hard ball housing hole may occur. For this reason, at the time of detachment of the pipe joint, the burr of the female joint may be caught on the outer peripheral surface or the recess of the male joint, and it may be difficult to detach the male joint and the female joint.

本発明は、上記問題点に鑑みてなされたものであり、貫通孔での球体の押圧によるバリの発生を抑制し、雄継手と雌継手とを容易に脱着することができる管継手を提供することを目的とする。 The present invention has been made in view of the above problems, and provides a pipe joint that can suppress the occurrence of burrs due to the pressing of a sphere in a through hole and can easily detach and attach a male joint and a female joint. For the purpose.

上記問題点を解決するために、請求項１に記載の発明に係る管継手は、内部に流路が形成され、外周面に凹部が形成された筒状の雄継手と、筒状とされ軸方向の一端側から前記雄継手が挿入される凹状挿入部が形成されると共に前記凹状挿入部と連続して流路が形成され、前記凹状挿入部に内周側から外周側に向かって拡径する孔壁を備えた貫通孔が周方向に配列された雌継手と、前記貫通孔に配置され、前記雄継手を前記凹状挿入部に挿入したときに前記凹部に係合されることで、前記雄継手を前記凹状挿入部に固定する球体と、前記雌継手に外装され、前記凹部に係合された前記球体を前記雌継手の半径方向外側から支持するカラーと、前記孔壁の内周面側の前記雌継手の前記一端側に形成された角部を切り落とした切り落とし部と、を有する。 In order to solve the above-described problems, a pipe joint according to the first aspect of the present invention includes a cylindrical male joint in which a flow path is formed inside and a recess is formed in an outer peripheral surface, and a cylindrical male shaft. A concave insertion portion into which the male joint is inserted is formed from one end side in the direction and a flow path is formed continuously with the concave insertion portion, and the diameter of the concave insertion portion is increased from the inner peripheral side toward the outer peripheral side. A through-hole provided with a hole wall to be arranged in the circumferential direction, and the through-hole is disposed in the through-hole, and is engaged with the recess when the male joint is inserted into the concave insertion portion, A sphere that fixes a male joint to the concave insertion portion, a collar that is externally mounted on the female joint and that supports the sphere engaged with the recess from the radially outer side of the female joint, and an inner peripheral surface of the hole wall A cut-off portion obtained by cutting off a corner portion formed on the one end side of the female joint on the side; To.

請求項１に記載の発明によれば、雄継手を雌継手の軸方向の一端側から凹状挿入部に挿入したときに、雌継手の貫通孔内に配置された球体が雄継手の外周面に形成された凹部に係合することで、雄継手が雌継手の凹状挿入部に固定される。その際、雌継手に外装されたカラーにより、球体が雌継手の半径方向外側から支持され、球体の凹部からの外れが防止されることで、雄継手と雌継手との連結状態が維持される。 According to the first aspect of the present invention, when the male joint is inserted into the concave insertion portion from the one axial end side of the female joint, the sphere disposed in the through hole of the female joint is formed on the outer peripheral surface of the male joint. The male joint is fixed to the concave insertion portion of the female joint by engaging with the formed recess. At that time, the collar mounted on the female joint supports the sphere from the radially outer side of the female joint and prevents the sphere from coming off from the concave portion, so that the connection state between the male joint and the female joint is maintained. .

この管継手では、貫通孔の孔壁の内周面側の雌継手の一端側に形成された角部を切り落とした切り落とし部が設けられている。これにより、管継手が高圧の繰り返し入力にさらされた際に、雌継手の貫通孔に球体が押圧されても、切り落とし部により角部の部分の体積が減り、貫通孔の孔壁から半径方向内側に突出するバリ、すなわち脱着に影響があるような雌継手のバリが発生しにくい。このため、雌継手における貫通孔の孔壁の内周面側と雄継手とのバリによる干渉が抑制され、雄継手と雌継手とを容易に脱着することができる。また、切り落とし部が、貫通孔における雌継手の一端側に形成されており、貫通孔の全周に形成されているわけではないので、球体が雌継手の貫通孔から落ち込むことを抑制できる。 In this pipe joint, a cut-off portion is provided by cutting off a corner portion formed on one end side of the female joint on the inner peripheral surface side of the hole wall of the through hole. As a result, when the sphere is pressed against the through hole of the female joint when the pipe joint is exposed to repeated high pressure, the volume of the corner portion is reduced by the cut-off portion, and the radial direction from the hole wall of the through hole is reduced. It is difficult to generate burrs protruding inward, that is, burrs of female joints that may affect desorption. For this reason, the interference by the burr | flash with the inner peripheral surface side of the hole wall of a through-hole in a female joint and a male joint is suppressed, and a male joint and a female joint can be attached or detached easily. Moreover, since the cut-off portion is formed on one end side of the female joint in the through hole and is not formed on the entire circumference of the through hole, it is possible to suppress the sphere from dropping from the through hole of the female joint.

請求項２に記載の発明は、請求項１に記載の管継手において、前記切り落とし部は、前記角部を前記雌継手の略半径方向に切り落としている。 According to a second aspect of the present invention, in the pipe joint according to the first aspect, the cut-off portion cuts off the corner portion in a substantially radial direction of the female joint.

請求項２に記載の発明によれば、切り落とし部は、角部を雌継手の略半径方向に切り落としているため、例えば、ドリルを雌継手の貫通孔の外周側から挿入して、切り落とし部を形成することができる。このため、切り落とし部の加工が容易となる。 According to the invention described in claim 2, since the cut-off portion has cut off the corner portion in the substantially radial direction of the female joint, for example, a drill is inserted from the outer peripheral side of the through-hole of the female joint, Can be formed. For this reason, the process of a cut-off part becomes easy.

請求項３に記載の発明は、請求項１に記載の管継手において、前記切り落とし部は、前記雌継手の軸方向と直交する方向視にて前記貫通孔の一部に周方向に沿って連続して形成されている。 According to a third aspect of the present invention, in the pipe joint according to the first aspect, the cut-off portion is continuous along a circumferential direction with a part of the through hole as viewed in a direction orthogonal to the axial direction of the female joint. Is formed.

請求項３に記載の発明によれば、切り落とし部が、雌継手の軸方向と直交する方向視にて貫通孔の一部に周方向に沿って連続して形成されているので、貫通孔の孔壁から半径方向内側に突出するバリの発生をより確実に抑制することができる。また、切り落とし部が、軸方向と直交する方向視にて貫通孔の全周ではなく、貫通孔の一部に周方向に沿って連続して形成されているので、球体が雌継手の貫通孔から落ち込むことをより確実に抑制することができる。 According to the invention described in claim 3, since the cut-off portion is continuously formed along the circumferential direction in a part of the through hole as viewed in a direction orthogonal to the axial direction of the female joint, Generation | occurrence | production of the burr | flash which protrudes in a radial inside from a hole wall can be suppressed more reliably. Further, since the cut-off portion is formed continuously along the circumferential direction in a part of the through-hole instead of the entire circumference of the through-hole as viewed in a direction orthogonal to the axial direction, the sphere is a through-hole of the female joint. It can suppress more reliably that it falls from.

請求項４に記載の発明は、請求項１から請求項３までのいずれか１項に記載の管継手において、前記切り落とし部は、前記孔壁における前記雌継手の軸方向の前記一端側のほか、前記雌継手の軸方向の他端側にも設けられている。 According to a fourth aspect of the present invention, in the pipe joint according to any one of the first to third aspects of the present invention, the cut-off portion is in addition to the one end side in the axial direction of the female joint on the hole wall. The other end of the female joint in the axial direction is also provided.

請求項４に記載の発明によれば、切り落とし部は、孔壁における雌継手の軸方向の一端側のほか、軸方向の他端側にも設けられているので、雌継手における貫通孔の一方向だけでなく、貫通孔の孔壁の両サイドに球体が押圧される場合でも、バリの発生を抑制することができる。 According to the invention described in claim 4, since the cut-off portion is provided on the other end side in the axial direction in addition to the one end side in the axial direction of the female joint in the hole wall, Generation of burrs can be suppressed not only in the direction but also when the sphere is pressed against both sides of the hole wall of the through hole.

本願発明の管継手によれば、貫通孔での球体の押圧によるバリの発生を抑制し、雄継手と雌継手とを容易に脱着することができる。 According to the pipe joint of the present invention, the generation of burrs due to the pressing of the spheres in the through holes can be suppressed, and the male joint and the female joint can be easily detached.

本発明の一実施形態に係る管継手における雄継手と雌継手が分離された状態を示す半裁断面図である。It is a half cut sectional view showing the state where the male joint and female joint in the pipe joint concerning one embodiment of the present invention were separated. 図１に示す管継手における雄継手と雌継手が連結された状態を示す半裁断面図である。It is a half-cut sectional view which shows the state in which the male joint and female joint in the pipe joint shown in FIG. 1 were connected. 図２に示す雌継手の貫通孔の切り落とし部付近を示す拡大断面図である。FIG. 3 is an enlarged sectional view showing the vicinity of a cut-off portion of a through hole of the female joint shown in FIG. 2. 図２に示す雌継手の貫通孔の切り落とし部付近を示す平面図である。It is a top view which shows the cut-off part vicinity of the through-hole of the female joint shown in FIG. （Ａ）は、比較例の管継手における無加圧状態の雌継手の貫通孔付近を示す断面図であり、（Ｂ）は、比較例の管継手における加圧状態の雌継手の貫通孔付近を示す断面図である。(A) is sectional drawing which shows the through-hole vicinity of the female joint of the non-pressurized state in the pipe joint of a comparative example, (B) is the through-hole vicinity of the pressurized female joint in the pipe joint of a comparative example FIG. 図５に示す雌継手の貫通孔にバリが発生した状態を示す断面図である。FIG. 6 is a cross-sectional view illustrating a state where burrs are generated in the through hole of the female joint illustrated in FIG. 5.

以下、本発明の実施の形態を図面に基づいて説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１には、本発明の一実施形態である管継手の雄継手と雌継手とが分離された状態が半裁断面図にて示されている。また、図２には、管継手の雌継手と雄継手とが連結された状態が半裁断面図にて示されている。図１及び図２に示されるように、本実施形態の管継手１０は、カップラーと称される迅速継手であり、雄型金具である雄継手（ノーズ）１２と、この雄継手１２が挿入される雌型金具である雌継手（ボディ）１４と、を備えている。図示を省略するが、雄継手１２は一方の配管に接続され、雌継手１４は他方の配管に接続されている。 FIG. 1 is a half-cut sectional view showing a state where a male joint and a female joint of a pipe joint according to an embodiment of the present invention are separated. Moreover, the state by which the female joint and male joint of the pipe joint were connected by FIG. 2 is shown with the half cut sectional view. As shown in FIG. 1 and FIG. 2, the pipe joint 10 of this embodiment is a quick joint called a coupler, and a male joint (nose) 12 that is a male metal fitting, and the male joint 12 are inserted. And a female joint (body) 14 which is a female fitting. Although not shown, the male joint 12 is connected to one pipe, and the female joint 14 is connected to the other pipe.

雄継手１２は、略円筒状に構成されており、内部に流体が通過可能な流路１６が形成されている。雄継手１２は、軸方向の一端部が小径とされている。より具体的には、図１に示されるように、雄継手１２は、軸方向の一端部側に、先端から第一円筒部１２Ａと、この第一円筒部１２Ａとテーパ面１２Ｂを介して連続すると共に第一円筒部１２Ａより外径が大きい第二円筒部１２Ｃと、を備えている。第二円筒部１２Ｃの外周面には、雌継手１４に設けられた複数の球体４８が係合される溝状の凹部１８が設けられている（図２参照）。この凹部１８は、軸方向に沿った断面が略台形状に形成されている。 The male joint 12 is formed in a substantially cylindrical shape, and a flow path 16 through which a fluid can pass is formed. The male joint 12 has a small diameter at one end in the axial direction. More specifically, as shown in FIG. 1, the male joint 12 is continuous from the front end to the one end side in the axial direction via the first cylindrical portion 12A and the first cylindrical portion 12A and the tapered surface 12B. And a second cylindrical portion 12C having an outer diameter larger than that of the first cylindrical portion 12A. On the outer peripheral surface of the second cylindrical portion 12C, there is provided a groove-like recess 18 with which a plurality of spheres 48 provided on the female joint 14 are engaged (see FIG. 2). The recess 18 has a substantially trapezoidal cross section along the axial direction.

雄継手１２の軸方向の中間部には、半径方向外側に突出した突出部２０が形成されている。雄継手１２の軸方向の他端部には、一方の配管（図示省略）が接続される雄ねじ部２２が形成されている。突出部２０は、軸方向視で外形が略六角形状に形成されており、一方の配管（図示省略）が雄ねじ部２２に螺合されるときにスパナを掛けて固定することができる。 A protruding portion 20 that protrudes outward in the radial direction is formed at the axial intermediate portion of the male joint 12. A male screw portion 22 to which one pipe (not shown) is connected is formed at the other end portion of the male joint 12 in the axial direction. The protrusion 20 has a substantially hexagonal outer shape when viewed in the axial direction, and can be fixed with a spanner when one pipe (not shown) is screwed into the male screw portion 22.

図１に示されるように、雌継手１４は、略円筒状に構成されており、軸方向の一端１５Ａ側に雄継手１２が挿入される凹状挿入部２８を備えている。雌継手１４の凹状挿入部２８は、軸方向の一端１５Ａ側（雄継手１２が挿入される側）から奥側に向かって内径が段階的に小径となるように形成されている。より具体的には、凹状挿入部２８には、凹状挿入部２８の奥側から雄継手１２の第一円筒部１２Ａに対応する第一内周面１４Ａと、雄継手１２のテーパ面１２Ｂに対応するテーパ面１４Ｂと、雄継手１２の第二円筒部１２Ｃに対応する第二内周面１４Ｃとが設けられている。雌継手１４の第一内周面１４Ａには、ゴム製のＯリング３０とバックアップリング３２が嵌入される溝部３４が形成されている。 As shown in FIG. 1, the female joint 14 is formed in a substantially cylindrical shape, and includes a concave insertion portion 28 into which the male joint 12 is inserted on the one end 15 A side in the axial direction. The concave insertion portion 28 of the female joint 14 is formed such that the inner diameter gradually decreases from the one end 15A side in the axial direction (side on which the male joint 12 is inserted) toward the back side. More specifically, the concave insertion portion 28 corresponds to the first inner peripheral surface 14A corresponding to the first cylindrical portion 12A of the male joint 12 and the tapered surface 12B of the male joint 12 from the back side of the concave insertion portion 28. A tapered surface 14B and a second inner peripheral surface 14C corresponding to the second cylindrical portion 12C of the male joint 12 are provided. A groove portion 34 into which a rubber O-ring 30 and a backup ring 32 are fitted is formed on the first inner peripheral surface 14A of the female joint 14.

雌継手１４の第一内周面１４Ａの奥側には、流体が流れる流路３６が凹状挿入部２８と連続して設けられている。また、雌継手１４の軸方向の他端１５Ｂ側（雄継手１２が挿入される側と反対側）には、他方の配管（図示省略）が接続される雌ねじ部３８が形成されている。 On the back side of the first inner peripheral surface 14 A of the female joint 14, a flow path 36 through which fluid flows is provided continuously with the concave insertion portion 28. Further, a female thread portion 38 to which the other pipe (not shown) is connected is formed on the other end 15B side in the axial direction of the female joint 14 (the side opposite to the side where the male joint 12 is inserted).

雌継手１４の軸方向の一端１５Ａ側（雄継手１２が挿入される側）の外周面には、雌継手１４と雄継手１２とを連結するためのカラー２６が外装されている。カラー２６は、環状体、筒状体、スリーブ、又はカバーなどで構成されている。カラー２６は、雌継手１４の軸方向に移動可能とされている。カラー２６の内側では、雌継手１４の外周面に半径方向内側に縮径された段部４０が形成されており、この段部４０に複数の貫通孔４２が周方向に形成（配列）されている。貫通孔４２は、第二内周面１４Ｃに設けられている。本実施形態では、貫通孔４２は、雌継手１４の周方向に８個設けられているが、貫通孔４２の数は変更可能である。例えば、貫通孔４２の数は、６〜１２個程度に設定することができる。貫通孔４２の形状については、後に詳述する。 A collar 26 for connecting the female joint 14 and the male joint 12 is provided on the outer peripheral surface of the female joint 14 on the one end 15A side in the axial direction (the side where the male joint 12 is inserted). The collar 26 is configured by an annular body, a cylindrical body, a sleeve, a cover, or the like. The collar 26 is movable in the axial direction of the female joint 14. On the inner side of the collar 26, a step portion 40 having a diameter reduced radially inward is formed on the outer peripheral surface of the female joint 14, and a plurality of through holes 42 are formed (arranged) in the circumferential direction in the step portion 40. Yes. The through hole 42 is provided in the second inner peripheral surface 14C. In the present embodiment, eight through holes 42 are provided in the circumferential direction of the female joint 14, but the number of through holes 42 can be changed. For example, the number of through holes 42 can be set to about 6 to 12. The shape of the through hole 42 will be described in detail later.

段部４０の先端側には周溝４４が形成されている。そして、段部４０に付勢部材としてのコイルスプリング４６が嵌められ、コイルスプリング４６の一端が雌継手１４における段部４０の他端１５Ｂ側の側壁に接触している。また、複数の貫通孔４２内にそれぞれ球体４８が納められている。球体４８は、硬い球からなり、例えば、ステンレス鋼（鋼球）で形成することができる。 A circumferential groove 44 is formed on the tip side of the stepped portion 40. A coil spring 46 as an urging member is fitted to the step portion 40, and one end of the coil spring 46 is in contact with the side wall on the other end 15 B side of the step portion 40 in the female joint 14. A sphere 48 is accommodated in each of the plurality of through holes 42. The sphere 48 is made of a hard sphere, and can be formed of, for example, stainless steel (steel ball).

カラー２６の内周側には、段部４０に対向して段部５０が形成されており、カラー２６が雌継手１４の外側に配置された状態で、コイルスプリング４６の他端が段部５０の一端１５Ａ側の側壁に接触している。すなわち、カラー２６と雌継手１４との間に配置されたコイルスプリング４６により、カラー２６が雄継手１２の半径方向外側から球体４８を支持する位置、すなわち球体４８の外れを防止する位置に付勢されている。これによって、カラー２６を雌継手１４の軸方向中間部側に移動するときに、段部５０の側壁によりコイルスプリング４６を押圧することとなる。また、雌継手１４の周溝４４に止め輪５２が嵌め込まれており、周溝４４と対向するカラー２６の先端（雄継手１２の挿入側）には、内周面を切り欠いた凹部５４が設けられている。そして、凹部５４が止め輪５２の外周に当たることで、雌継手１４からのカラー２６の抜け止めとされている。 A step portion 50 is formed on the inner peripheral side of the collar 26 so as to face the step portion 40, and the other end of the coil spring 46 is connected to the step portion 50 in a state where the collar 26 is disposed outside the female joint 14. Is in contact with the side wall on the one end 15A side. That is, the coil spring 46 disposed between the collar 26 and the female joint 14 is biased to a position where the collar 26 supports the sphere 48 from the radially outer side of the male joint 12, that is, a position where the sphere 48 is prevented from coming off. Has been. As a result, when the collar 26 is moved to the axially intermediate portion side of the female joint 14, the coil spring 46 is pressed by the side wall of the step portion 50. A retaining ring 52 is fitted in the circumferential groove 44 of the female joint 14, and a concave portion 54 with a notched inner circumferential surface is formed at the tip of the collar 26 facing the circumferential groove 44 (on the insertion side of the male joint 12). Is provided. The concave portion 54 hits the outer periphery of the retaining ring 52 to prevent the collar 26 from coming off from the female joint 14.

カラー２６の内周には、球体４８の当たり面となる内周面５６が構成されている。内周面５６は、段部５０の内径よりも小さい内径になるように形成されている。球体４８が内周面５６に当たっているときには、球体４８は雌継手１４の半径方向内側へ押されて雌継手１４の第二内周面１４Ｃから内側へ突出している。これにより、複数の球体４８が雄継手１２の凹部１８から外れることが防止され、雄継手１２が凹状挿入部２８に固定されるようになっている（図２参照）。 On the inner periphery of the collar 26, an inner peripheral surface 56 that is a contact surface of the sphere 48 is formed. The inner peripheral surface 56 is formed to have an inner diameter that is smaller than the inner diameter of the stepped portion 50. When the sphere 48 is in contact with the inner peripheral surface 56, the sphere 48 is pushed inward in the radial direction of the female joint 14 and protrudes inward from the second inner peripheral surface 14 C of the female joint 14. Thereby, it is prevented that the some spherical body 48 remove | deviates from the recessed part 18 of the male joint 12, and the male joint 12 is fixed to the concave insertion part 28 (refer FIG. 2).

また、カラー２６の内周面５６よりも止め輪５２側（コイルスプリング４６と反対側）には、半径方向外側に拡径された拡径部５８が形成されている。カラー２６をコイルスプリング４６の力に抗して雌継手１４の軸方向中間部側に移動させ、拡径部５８が球体４８と対応する位置に配置されると、球体４８が半径方向外側へ移動可能となる。これにより、球体４８が雄継手１２の凹部１８から外れ、雄継手１２を雌継手１４から引き抜く（分離する）ことができる。 Further, on the side of the retaining ring 52 (on the side opposite to the coil spring 46) from the inner peripheral surface 56 of the collar 26, a diameter-expanded portion 58 that is expanded radially outward is formed. When the collar 26 is moved to the axially intermediate portion side of the female joint 14 against the force of the coil spring 46 and the enlarged diameter portion 58 is arranged at a position corresponding to the sphere 48, the sphere 48 moves radially outward. It becomes possible. Thereby, the sphere 48 is detached from the recess 18 of the male joint 12, and the male joint 12 can be pulled out (separated) from the female joint 14.

また、カラー２６の外周面の外径が大きい部分には、ユーザーがカラー２６を指でつかんで軸方向に移動しやすくするために、細かい凹凸が形成されている。 Further, in the portion where the outer diameter of the outer peripheral surface of the collar 26 is large, fine irregularities are formed so that the user can easily move the collar 26 in the axial direction by grasping the collar 26 with a finger.

図３に示されるように、雌継手１４の貫通孔４２は、内周側から外周側に向かって拡径する孔壁４２Ａを備えている。すなわち、側断面視にて貫通孔４２はすり鉢状に形成されており、孔壁４２Ａはテーパ部とされている。さらに、貫通孔４２の孔壁４２Ａにおける雌継手１４の内周面としての第二内周面１４Ｃ側には、雌継手１４の軸方向の一端１５Ａ側（雄継手１２が挿入される側）に形成された角部（エッジ）を切り落とした切り落とし部４２Ｂが形成されている。言い換えると、切り落とし部４２Ｂは、貫通孔４２における雌継手１４の軸方向の一端１５Ａ側、すなわち、内圧が作用したときに球体４８が貫通孔４２の孔壁４２Ａに押圧される側の角部（孔壁４２Ａと第二内周面１４Ｃとによって形成される角部）を切り落としている。言い換えると、切り落とし部４２Ｂは、貫通孔４２の孔壁４２Ａの角部を面取りした構成とされている。切り落とし部４２Ｂは、貫通孔４２における孔壁４２Ａの底面側（内径が小さい側）に設けられている。本実施形態では、切り落とし部４２Ｂは、貫通孔４２の角部を雌継手１４の略半径方向（雌継手１４の軸方向に対して略直交する方向）に切り落としている。 As shown in FIG. 3, the through hole 42 of the female joint 14 includes a hole wall 42 A that increases in diameter from the inner peripheral side toward the outer peripheral side. That is, the through hole 42 is formed in a mortar shape in a side sectional view, and the hole wall 42A is a tapered portion. Further, on the second inner peripheral surface 14C side as the inner peripheral surface of the female joint 14 in the hole wall 42A of the through hole 42, on the one end 15A side in the axial direction of the female joint 14 (the side on which the male joint 12 is inserted). A cut-off portion 42B is formed by cutting off the formed corner (edge). In other words, the cut-off portion 42B is on the end 15A side in the axial direction of the female joint 14 in the through hole 42, that is, the corner portion on the side where the sphere 48 is pressed against the hole wall 42A of the through hole 42 when internal pressure is applied. The corner formed by the hole wall 42A and the second inner peripheral surface 14C is cut off. In other words, the cut-off portion 42B has a configuration in which a corner portion of the hole wall 42A of the through hole 42 is chamfered. The cut-off portion 42B is provided on the bottom surface side (the smaller inner diameter side) of the hole wall 42A in the through hole 42. In the present embodiment, the cut-off portion 42B cuts off the corner portion of the through hole 42 in a substantially radial direction of the female joint 14 (a direction substantially perpendicular to the axial direction of the female joint 14).

図４に示されるように、切り落とし部４２Ｂは、雌継手１４の軸方向と直交する方向視（平面視）にて貫通孔４２の一部に周方向に沿って連続して形成されている。本実施形態では、切り落とし部４２Ｂは、貫通孔４２の孔壁４２Ａの円周の約１／４程度の範囲に形成されている。また、本実施形態では、孔壁４２Ａは、雌継手１４の半径方向の仮想線に対して約１５度の角度で形成されている。 As shown in FIG. 4, the cut-off portion 42 B is continuously formed along a circumferential direction in a part of the through hole 42 in a direction view (plan view) orthogonal to the axial direction of the female joint 14. In the present embodiment, the cut-off portion 42B is formed in a range of about ¼ of the circumference of the hole wall 42A of the through hole 42. In the present embodiment, the hole wall 42 A is formed at an angle of about 15 degrees with respect to the imaginary line in the radial direction of the female joint 14.

切り落とし部４２Ｂを形成する際には、図４に示されるように、雌継手１４の外周側から孔壁４２Ａの底面（内径が小さい側）の径より小さい直径のドリル７０を貫通孔４２に挿入する。そして、雌継手１４の軸方向の一端１５Ａ側（すなわち、球体４８の押圧面側）に貫通孔４２の円周の約１／４程度に軸方向に対して垂直にドリル７０を入れて切削加工を施すことで、貫通孔４２の円周の約１／４の範囲に切り落とし部４２Ｂを形成することができる。言い換えると、孔壁４２Ａの中心に対してドリル７０の中心をずらしてドリル７０を孔壁４２Ａの周方向の所定の範囲に当てることで、孔壁４２Ａの底面の限られた範囲内での切削加工を行うため、切り落とし部４２Ｂの孔径が貫通孔４２の全周に広がるわけではなく、貫通孔４２の周方向の限られた範囲に切り落とし部４２Ｂを形成することができる。 When the cut-off portion 42B is formed, as shown in FIG. 4, a drill 70 having a diameter smaller than the diameter of the bottom surface (the smaller inner diameter side) of the hole wall 42A is inserted into the through hole 42 from the outer peripheral side of the female joint 14. To do. Then, a drill 70 is inserted perpendicularly to the axial direction at about ¼ of the circumference of the through hole 42 at one end 15A side of the female joint 14 in the axial direction (that is, the pressing surface side of the sphere 48). As a result, the cut-off portion 42B can be formed in a range of about ¼ of the circumference of the through-hole 42. In other words, by cutting the center of the drill 70 with respect to the center of the hole wall 42A and applying the drill 70 to a predetermined range in the circumferential direction of the hole wall 42A, cutting within a limited range of the bottom surface of the hole wall 42A is performed. In order to perform processing, the hole diameter of the cut-off portion 42B does not spread all around the through-hole 42, and the cut-out portion 42B can be formed in a limited range in the circumferential direction of the through-hole 42.

このように、切り落とし部４２Ｂが、貫通孔４２の孔壁４２Ａの底面側の全周ではなく、貫通孔４２の孔壁４２Ａの周方向の限られた範囲に形成されていることで、球体４８が貫通孔４２から内側に落ち込むことを阻止することができる。 Thus, the cut-off portion 42B is formed not in the entire circumference on the bottom surface side of the hole wall 42A of the through hole 42 but in a limited range in the circumferential direction of the hole wall 42A of the through hole 42, so that the sphere 48 is formed. Can be prevented from falling inward from the through hole 42.

管継手１０を構成する雌継手１４と雄継手１２の材料としては、鋼材などの金属が用いられている。本実施形態の管継手１０は、例えば、自動車、船舶などに用いられる油圧配管用の管継手などに用いることができるが、これらに限定されず、他の流体（液体、気体）に使用することも可能である。 As a material of the female joint 14 and the male joint 12 constituting the pipe joint 10, a metal such as a steel material is used. The pipe joint 10 of the present embodiment can be used for, for example, pipe joints for hydraulic piping used in automobiles, ships, etc., but is not limited to these, and is used for other fluids (liquid, gas). Is also possible.

次に、管継手１０の作用について説明する。 Next, the operation of the pipe joint 10 will be described.

図２に示されるように、雄継手１２が雌継手１４の凹状挿入部２８に挿入された状態では、カラー２６の内周面５６に押されて貫通孔４２内の球体４８が雄継手１２の凹部１８に係合され（凹部１８内に嵌まり）、雄継手１２が雌継手１４の凹状挿入部２８に固定されている。その際、雄継手１２の半径方向外側でカラー２６により複数の球体４８が支持されており、カラー２６の内周面５６により複数の球体４８の外れが防止されることで、雄継手１２と雌継手１４との連結状態が維持されている。カラー２６は、コイルスプリング４６により球体４８の外れが防止される位置（雌継手１４の軸方向の一端１５Ａ側）に付勢されている。 As shown in FIG. 2, in a state where the male joint 12 is inserted into the concave insertion portion 28 of the female joint 14, the sphere 48 in the through hole 42 is pushed by the inner peripheral surface 56 of the collar 26. The male joint 12 is engaged with the concave portion 18 (fit into the concave portion 18), and is fixed to the concave insertion portion 28 of the female joint 14. At this time, the plurality of spheres 48 are supported by the collar 26 on the radially outer side of the male joint 12, and the detachment of the plurality of spheres 48 is prevented by the inner peripheral surface 56 of the collar 26. The connection state with the joint 14 is maintained. The collar 26 is biased to a position where the sphere 48 is prevented from coming off by the coil spring 46 (on the one end 15A side in the axial direction of the female joint 14).

また、雄継手１２と雌継手１４との連結を解除する際には、コイルスプリング４６の力に抗してカラー２６を図２に示す状態から雌継手１４の軸方向の中間部側に移動させる。これにより、カラー２６の拡径部５８が球体４８と対向し、球体４８が拡径部５８内に退避できるようになる。この状態で、球体４８が雄継手１２の凹部１８から外れることで、雄継手１２を雌継手１４の凹状挿入部２８内から引き抜く（分離する）ことができる。 Further, when the connection between the male joint 12 and the female joint 14 is released, the collar 26 is moved from the state shown in FIG. 2 to the axially intermediate portion side of the female joint 14 against the force of the coil spring 46. . As a result, the enlarged diameter portion 58 of the collar 26 faces the sphere 48, and the sphere 48 can be retracted into the enlarged diameter portion 58. In this state, the sphere 48 is detached from the concave portion 18 of the male joint 12, whereby the male joint 12 can be pulled out (separated) from the concave insertion portion 28 of the female joint 14.

さらに、カラー２６をコイルスプリング４６の力により元の位置（雌継手１４の軸方向の一端１５Ａ側）に戻すと、カラー２６の内周面５６が球体４８に接触する位置に配置される（図１参照）。なお、雄継手１２と雌継手１４とを連結する際には、上記の管継手１０の連結を解除する操作と逆の操作を行なえばよい。 Further, when the collar 26 is returned to the original position (on the one end 15A side in the axial direction of the female joint 14) by the force of the coil spring 46, the inner peripheral surface 56 of the collar 26 is disposed at a position where it contacts the sphere 48 (see FIG. 1). When the male joint 12 and the female joint 14 are connected, an operation opposite to the operation for releasing the connection of the pipe joint 10 may be performed.

このような管継手１０では、図３に示されるように、雌継手１４の貫通孔４２は、内周側から外周側に向かって拡径する孔壁４２Ａを備えている。さらに、貫通孔４２には、孔壁４２Ａの第二内周面１４Ｃ側の雌継手１４の軸方向の一端１５Ａ側（図２参照）に形成された角部を切り落とした切り落とし部４２Ｂが設けられている。すなわち、切り落とし部４２Ｂは、雌継手１４の軸方向の一端１５Ａ側（図２参照）、すなわち、内圧が作用したときに球体４８が貫通孔４２の孔壁４２Ａに押圧される側に設けられている。これにより、管継手１０が高圧の繰り返し入力にさらされた際に、雌継手１４の貫通孔４２の孔壁４２Ａに球体４８が押圧されても、切り落とし部４２Ｂにより角部の部分の体積が減り、貫通孔４２の孔壁４２Ａから半径方向内側に突出するバリ（バリ返り）、すなわち脱着に影響があるようなバリ（バリ返り）が発生しにくい。このため、雌継手１４における貫通孔４２の第二内周面１４Ｃ側と雄継手１２とのバリによる干渉が抑制され、雄継手１２と雌継手１４とを容易に脱着することができる。 In such a pipe joint 10, as shown in FIG. 3, the through hole 42 of the female joint 14 includes a hole wall 42 A that increases in diameter from the inner peripheral side toward the outer peripheral side. Further, the through hole 42 is provided with a cut-off portion 42B formed by cutting off a corner portion formed on one end 15A side (see FIG. 2) of the female joint 14 on the second inner peripheral surface 14C side of the hole wall 42A. ing. That is, the cut-off portion 42B is provided on one end 15A side of the female joint 14 in the axial direction (see FIG. 2), that is, on the side where the sphere 48 is pressed against the hole wall 42A of the through hole 42 when internal pressure is applied. Yes. Thereby, when the spherical body 48 is pressed against the hole wall 42A of the through hole 42 of the female joint 14 when the pipe joint 10 is subjected to repeated high pressure, the volume of the corner portion is reduced by the cut-off portion 42B. In addition, burrs (burr return) projecting radially inward from the hole wall 42A of the through hole 42, that is, burrs (burr return) that have an influence on desorption are unlikely to occur. For this reason, the interference by the burr | flash with the 2nd internal peripheral surface 14C side of the through-hole 42 in the female joint 14 and the male joint 12 is suppressed, and the male joint 12 and the female joint 14 can be remove | desorbed easily.

また、切り落とし部４２Ｂは、貫通孔４２における孔壁４２Ａの半径方向内側から略半径方向に切り落とされており、例えば、雌継手１４の外周側からドリル７０を挿入することで、切り落とし部４２Ｂを形成することができる。図４に示されるように、雌継手１４の外周側から孔壁４２Ａの底面の径より小さい直径のドリル７０を貫通孔４２に挿入し、雌継手１４の軸方向の一端１５Ａ側（球体４８の押圧面側）に貫通孔４２の円周の約１／４程度に軸方向に対して垂直にドリル７０を入れて切削加工する。これにより、貫通孔４２の周方向の所定の範囲に切り落とし部４２Ｂを形成することができ、切り落とし部４２Ｂの加工が容易である。 The cut-off portion 42B is cut off in a substantially radial direction from the radial inner side of the hole wall 42A in the through hole 42. For example, the cut-off portion 42B is formed by inserting the drill 70 from the outer peripheral side of the female joint 14. can do. As shown in FIG. 4, a drill 70 having a diameter smaller than the diameter of the bottom surface of the hole wall 42 A is inserted into the through-hole 42 from the outer peripheral side of the female joint 14. A drill 70 is inserted perpendicularly to the axial direction at about ¼ of the circumference of the through hole 42 on the pressing surface side) and is cut. Thereby, the cut-off portion 42B can be formed in a predetermined range in the circumferential direction of the through hole 42, and the cut-off portion 42B can be easily processed.

また、図４に示されるように、切り落とし部４２Ｂは、雌継手１４の軸方向と直交する方向視（平面視）にて貫通孔４２の一部に周方向に沿って連続して形成されている。本実施形態では、貫通孔４２の円周の約１／４程度の範囲に形成されている。すなわち、切り落とし部４２Ｂは、貫通孔４２の底面側（内径が小さい側）の全周ではなく、貫通孔４２の周方向の限られた範囲に形成されているため、球体４８が雌継手１４の貫通孔４２から内側に落ち込むことを阻止することができる。 Further, as shown in FIG. 4, the cut-off portion 42 B is continuously formed along a circumferential direction in a part of the through hole 42 in a direction view (plan view) orthogonal to the axial direction of the female joint 14. Yes. In the present embodiment, it is formed in a range of about ¼ of the circumference of the through hole 42. That is, since the cut-off portion 42B is formed not in the entire circumference on the bottom surface side (side where the inner diameter is small) of the through hole 42 but in a limited range in the circumferential direction of the through hole 42, the sphere 48 is formed in the female joint 14. It can prevent falling from the through hole 42 to the inside.

また、切り落とし部４２Ｂは、貫通孔４２における孔壁４２Ａの半径方向内側から略半径方向に切り落とされているので、雌継手１４の貫通孔４２の周囲の厚さ（軸方向と直交する方向の厚さ）は変化しない。このため、例えば、雌継手１４の貫通孔４２の内周面側から貫通孔４２の周囲に凹部などを形成する場合に比べて、雌継手１４の貫通孔４２の周囲の厚さが変化しないため、雌継手１４の貫通孔４２の周囲の破断強度が低下することもない。さらに、雌継手１４の材料を従来よりも硬度の高い材料に変更したり、熱処理などにより雌継手１４の硬度を増す必要もないので、コスト上昇を抑制できる。 Further, since the cut-off portion 42B is cut off in a substantially radial direction from the inner side in the radial direction of the hole wall 42A in the through-hole 42, the thickness around the through-hole 42 of the female joint 14 (thickness in the direction orthogonal to the axial direction). Is not changed. For this reason, for example, the thickness around the through hole 42 of the female joint 14 does not change compared to the case where a recess or the like is formed around the through hole 42 from the inner peripheral surface side of the through hole 42 of the female joint 14. The breaking strength around the through hole 42 of the female joint 14 is not reduced. Furthermore, it is not necessary to change the material of the female joint 14 to a material having a higher hardness than before, or to increase the hardness of the female joint 14 by heat treatment or the like, so that an increase in cost can be suppressed.

図５には、比較例に係る管継手１００における貫通孔付近の構成が断面図にて示されている。図５（Ａ）には、管継手１００に内圧が作用していない状態（無加圧状態）の断面図が示されており、図５（Ｂ）には、管継手１００に内圧が作用している状態（加圧状態）の断面図が示されている。図５（Ａ）、（Ｂ）に示されるように、雌継手１０４には、雄継手１２の凹部１８に係合される球体４８が配置される貫通孔１０６が周方向に配列されている。貫通孔１０６は、内周側から外周側に向かって拡径する孔壁１０６Ａを備えている。すなわち、雌継手１０４の内周面１０４Ａと孔壁１０６Ａとの交差する位置に角部１０６Ｂが設けられている。この管継手１００では、貫通孔１０６の孔壁１０６Ａにおける内周面１０４Ａ側に、上記実施形態のような角部を切り落とした切り落とし部は設けられていない。 FIG. 5 is a cross-sectional view showing the configuration near the through hole in the pipe joint 100 according to the comparative example. FIG. 5A shows a cross-sectional view in a state where no internal pressure is applied to the pipe joint 100 (non-pressurized state), and FIG. 5B shows that the internal pressure is applied to the pipe joint 100. A cross-sectional view in a pressed state (pressurized state) is shown. As shown in FIGS. 5A and 5B, in the female joint 104, through holes 106 in which the spheres 48 that are engaged with the recesses 18 of the male joint 12 are arranged are arranged in the circumferential direction. The through-hole 106 includes a hole wall 106A that increases in diameter from the inner peripheral side toward the outer peripheral side. That is, the corner portion 106B is provided at a position where the inner peripheral surface 104A of the female joint 104 intersects the hole wall 106A. In this pipe joint 100, a cut-off portion obtained by cutting off a corner portion as in the above embodiment is not provided on the inner peripheral surface 104 A side of the hole wall 106 A of the through-hole 106.

このような管継手１００では、図５（Ｂ）に示されるように、管継手１００に内圧が作用すると、雄継手１２が雌継手１０４から抜ける方向（矢印Ａ方向）に若干移動し、球体４８が雌継手１０４の軸方向の一端側（雄継手１２が挿入される側）の貫通孔１０６の孔壁１０６Ａに押圧される。図６に示されるように、管継手１００が高圧の繰り返し入力にさらされると、雌継手１０４の貫通孔１０６の孔壁１０６Ａにおける球体４８の保持部分（図５（Ｂ）の角部１０６Ｂ付近）が内周面側に変形し、貫通孔１０６の孔壁１０６Ａから半径方向内側に突出するバリ（バリ返り）１１０が発生する。すなわち、貫通孔１０６の孔壁１０６Ａが球体４８により押圧されることで、孔壁１０６Ａの最も強度の低い方向（内周面方向）に突出して変形するバリ１１０となって現れる。このため、雄継手１２と雌継手１０４との脱着時に、バリ１１０が雄継手１２の外周面や凹部１８に引っ掛かり、雄継手１２と雌継手１０４との脱着が困難になる可能性がある。 In such a pipe joint 100, as shown in FIG. 5B, when an internal pressure is applied to the pipe joint 100, the male joint 12 slightly moves in the direction of pulling out from the female joint 104 (arrow A direction), and the sphere 48 Is pressed against the hole wall 106A of the through hole 106 on one end side (the side where the male joint 12 is inserted) of the female joint 104 in the axial direction. As shown in FIG. 6, when the pipe joint 100 is exposed to high pressure repeatedly, the holding portion of the sphere 48 in the hole wall 106A of the through hole 106 of the female joint 104 (near the corner 106B in FIG. 5B). Is deformed to the inner peripheral surface side, and a burr (burr return) 110 protruding radially inward from the hole wall 106A of the through hole 106 is generated. That is, when the hole wall 106A of the through hole 106 is pressed by the sphere 48, it appears as a burr 110 that protrudes and deforms in the lowest strength direction (inner peripheral surface direction) of the hole wall 106A. For this reason, when the male joint 12 and the female joint 104 are attached and detached, the burr 110 may be caught on the outer peripheral surface of the male joint 12 and the recess 18, and the male joint 12 and the female joint 104 may be difficult to attach and remove.

これに対して、本実施形態の管継手１０では、図３に示されるように、貫通孔４２における孔壁４２Ａの第二内周面１４Ｃ側の雌継手１４の一端１５Ａ側に、孔壁４２Ａと第二内周面１４Ｃとの角部を切り落とした切り落とし部４２Ｂが形成されている。このため、管継手１０が高圧の繰り返し入力にさらされた際に、雌継手１４の貫通孔４２の孔壁４２Ａに球体４８が押圧されても、切り落とし部４２Ｂにより孔壁４２Ａの内側の角部が除去されているため、貫通孔４２の孔壁４２Ａから半径方向内側に突出するバリ（バリ返り）、すなわち脱着に影響があるような雌継手１４のバリ（バリ返り）が発生しにくい。このため、雄継手１２と雌継手１４とを容易に脱着することができる。 In contrast, in the pipe joint 10 of the present embodiment, as shown in FIG. 3, the hole wall 42 A is formed on the end 15 A side of the female joint 14 on the second inner peripheral surface 14 C side of the hole wall 42 A in the through hole 42. A cut-off portion 42B is formed by cutting off a corner portion between the second inner peripheral surface 14C and the second inner peripheral surface 14C. For this reason, even when the spherical body 48 is pressed against the hole wall 42A of the through hole 42 of the female joint 14 when the pipe joint 10 is subjected to repeated high-pressure input, the corner portion on the inner side of the hole wall 42A by the cut-off portion 42B. Therefore, the burr (burr return) protruding radially inward from the hole wall 42A of the through hole 42, that is, the burr (burr return) of the female joint 14 that has an influence on the attachment / detachment hardly occurs. For this reason, the male joint 12 and the female joint 14 can be easily detached.

なお、上記実施形態では、貫通孔４２における雌継手１４の軸方向の一端１５Ａ側のみに切り落とし部４２Ｂが形成されているが、本発明はこれに限定されるものではない。例えば、貫通孔４２における雌継手１４の軸方向の両サイドに球体４８が押圧される（球体４８の押し圧が作用する）場合は、貫通孔４２における軸方向の一端１５Ａ側とこれに対向する軸方向の他端１５Ｂ側に、角部を切り落とした切り落とし部を設けてもよい。これにより、雌継手における貫通孔の一方向だけでなく、両サイドに球体が押圧される場合でも、貫通孔の孔壁から突出するバリの発生を抑制することができる。 In the above-described embodiment, the cut-off portion 42B is formed only at the axial end of the female joint 14 in the through hole 42, but the present invention is not limited to this. For example, when the sphere 48 is pressed on both sides of the female joint 14 in the through hole 42 in the axial direction (the pressing force of the sphere 48 acts), the one end 15A side in the axial direction of the through hole 42 is opposed to this. You may provide the cut-off part which cut off the corner | angular part in the other end 15B side of an axial direction. Thereby, even when a spherical body is pressed not only in one direction of the through hole in the female joint but also on both sides, the occurrence of burrs protruding from the hole wall of the through hole can be suppressed.

また、上記実施形態では、雌継手１４の軸方向と直交する方向視（平面視）にて貫通孔の円周の約１／４程度に切り落とし部が設けられているが、本発明はこれに限定されるものではない。貫通孔の周方向の一部であれば、貫通孔の円周の約１／４よりも狭い範囲、又は円周の約１／４よりも広い範囲に切り落とし部を設けてもよい。 Moreover, in the said embodiment, although the cut-off part is provided in about 1/4 of the circumference of a through-hole by the direction view (plan view) orthogonal to the axial direction of the female joint 14, this invention is based on this. It is not limited. If it is a part in the circumferential direction of the through hole, the cut-off portion may be provided in a range narrower than about 1/4 of the circumference of the through hole or in a range wider than about 1/4 of the circumference.

また、上記実施形態では、貫通孔４２の孔壁４２Ａから略半径方向に切り落とし部が設けられているが、略半径方向は、雌継手の軸方向と直交する方向から若干ずれていてもよい。特に、貫通孔４２の孔壁４２Ａから軸方向の一端１５Ａ側（雄継手１２が挿入される側）に、雌継手の軸方向に対して切り落とし部の奥側（雌継手の軸方向の中間部側）角度が僅かに鋭角となるように切り落とし部を構成してもよい。 Moreover, in the said embodiment, although the cut-off part is provided in the substantially radial direction from the hole wall 42A of the through-hole 42, the substantially radial direction may be shifted | deviated slightly from the direction orthogonal to the axial direction of a female joint. In particular, from the hole wall 42A of the through hole 42 to the one end 15A side in the axial direction (the side where the male joint 12 is inserted), the back side of the cut-off portion with respect to the axial direction of the female joint (the intermediate part in the axial direction of the female joint) The cut-off portion may be configured so that the side) angle is slightly acute.

さらに、本発明は、上記実施形態の管継手１０の構成に限定されるものではなく、雌継手の貫通孔に球体が配置された構成であれば、他の構成の管継手に本発明を適用することができる。 Furthermore, the present invention is not limited to the configuration of the pipe joint 10 of the above embodiment, and the present invention is applied to pipe joints of other configurations as long as a sphere is arranged in the through hole of the female joint. can do.

１０管継手、１２雄継手、１４雌継手、１４Ｃ第二内周面（内周面）、
１５Ａ一端、１５Ｂ他端、１６流路、１８凹部、２６カラー、
２８凹状挿入部、３６流路、４２貫通孔、４２Ａ孔壁、
４２Ｂ切り落とし部、４８球体 10 pipe joint, 12 male joint, 14 female joint, 14C second inner peripheral surface (inner peripheral surface),
15A one end, 15B other end, 16 channel, 18 recess, 26 collar,
28 concave insertion part, 36 flow path, 42 through-hole, 42A hole wall,
42B Cut-off part, 48 sphere

Claims

内部に流路が形成され、外周面に凹部が形成された筒状の雄継手と、
筒状とされ軸方向の一端側から前記雄継手が挿入される凹状挿入部が形成されると共に前記凹状挿入部と連続して流路が形成され、前記凹状挿入部に内周側から外周側に向かって拡径する孔壁を備えた貫通孔が周方向に配列された雌継手と、
前記貫通孔に配置され、前記雄継手を前記凹状挿入部に挿入したときに前記凹部に係合されることで、前記雄継手を前記凹状挿入部に固定する球体と、
前記雌継手に外装され、前記凹部に係合された前記球体を前記雌継手の半径方向外側から支持するカラーと、
前記孔壁の内周面側の前記雌継手の前記一端側に形成された角部を切り落とした切り落とし部と、
を有する管継手。 A cylindrical male joint in which a flow path is formed inside and a recess is formed on the outer peripheral surface;
A cylindrical insertion portion is formed into which a male joint is inserted from one end side in the axial direction, and a flow path is formed continuously with the concave insertion portion. A female joint in which through-holes having a hole wall that expands toward the circumference are arranged in the circumferential direction;
A sphere that is disposed in the through hole and is engaged with the recess when the male joint is inserted into the concave insertion portion, thereby fixing the male joint to the concave insertion portion,
A collar that is externally mounted on the female joint and supports the sphere engaged with the recess from the radially outer side of the female joint;
A cut-off portion obtained by cutting off a corner portion formed on the one end side of the female joint on the inner peripheral surface side of the hole wall;
Pipe fittings with

前記切り落とし部は、前記角部を前記雌継手の略半径方向に切り落としている請求項１に記載の管継手。 The pipe joint according to claim 1, wherein the cut-off portion cuts off the corner portion in a substantially radial direction of the female joint.

前記切り落とし部は、前記雌継手の軸方向と直交する方向視にて前記貫通孔の一部に周方向に沿って連続して形成されている請求項１又は請求項２に記載の管継手。 The pipe joint according to claim 1 or 2, wherein the cut-off portion is formed continuously along a circumferential direction in a part of the through hole as viewed in a direction perpendicular to the axial direction of the female joint.

前記切り落とし部は、前記孔壁における前記雌継手の軸方向の前記一端側のほか、前記雌継手の軸方向の他端側にも設けられている請求項１から請求項３までのいずれか１項に記載の管継手。 The cut-off portion is provided not only on the one end side in the axial direction of the female joint on the hole wall but also on the other end side in the axial direction of the female joint. The pipe joint according to item.