JP5411601B2 - Pipe fitting - Google Patents

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JP5411601B2
JP5411601B2 JP2009154842A JP2009154842A JP5411601B2 JP 5411601 B2 JP5411601 B2 JP 5411601B2 JP 2009154842 A JP2009154842 A JP 2009154842A JP 2009154842 A JP2009154842 A JP 2009154842A JP 5411601 B2 JP5411601 B2 JP 5411601B2
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locking element
sleeve
pipe joint
peripheral surface
female
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JP2011012692A (en
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盡 山下
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Nitto Kohki Co Ltd
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Nitto Kohki Co Ltd
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本発明は管継手に関し、特に、アルミダイカストなどにおいて金型を一定の温度に保つために該金型に熱媒体油を供給する管路に使われるのに適した管継手に関する。   The present invention relates to a pipe joint, and more particularly to a pipe joint suitable for use in a pipe line for supplying heat medium oil to a mold in order to keep the mold at a constant temperature in aluminum die casting or the like.

アルミダイカストなどでは金型を一定の温度に保つために金型に熱媒体油を供給することが行われるが、金型を変えるたびに、金型内部の管路と該管路に対して熱媒体油を供給排出するための供給排出管路とを外さなければならない。このための作業を容易にするために近年は、雌型管継手と該雌型管継手に挿入連結される雄型管継手とからなる管継手が用いられるようになってきている。   In aluminum die casting and the like, heat medium oil is supplied to the mold in order to keep the mold at a constant temperature, but each time the mold is changed, heat is applied to the pipe line inside the mold and the pipe line. The supply / discharge line for supplying and discharging the medium oil must be disconnected. In order to facilitate the work for this purpose, in recent years, a pipe joint comprising a female pipe joint and a male pipe joint inserted and connected to the female pipe joint has been used.

具体的には、雌型管継手は、雄型管継手を受け入れる受入部を画定する筒状の周壁を有し、該周壁にその半径方向を貫通するように施錠子孔が形成されている雌型本体と、施錠子孔に半径方向で変位可能で、一部が該受入部内に挿入される施錠位置と、該施錠位置よりも外側に変位した解放位置との間で変位可能とされた施錠子（施錠ボール）と、周壁の外周面上に設けられ、該施錠子を半径方向外側から押圧して該施錠子を施錠位置とする押圧位置と該施錠子が半径方向外側に変位して該解放位置となるのを許容する押圧解除位置との間で当該周壁の軸線方向で変位可能なスリーブを有する。これに対して、雄型管継手は雌型管継手の受入部内に挿入される挿入部を有し、該挿入部の外周面に、施錠子を受け入れて、当該挿入部を受入部内に施錠するための施錠凹部を有する。この管継手においては、スリーブを雌型管継手の軸線方向で変位することにより、雄型及び雌型管継手の連結・連結解除が行われる。この種の管継手としては特許文献１に開示されたようなものがある。   Specifically, the female pipe joint has a cylindrical peripheral wall that defines a receiving portion for receiving the male pipe joint, and a female locking hole is formed in the peripheral wall so as to penetrate the radial direction. Locking that is displaceable between a mold body and a locking element hole that is displaceable in a radial direction, a part of which is inserted into the receiving portion, and a release position that is displaced outward from the locking position. A child (locking ball), provided on the outer peripheral surface of the peripheral wall, and pressing the locking element from outside in the radial direction to set the locking element to the locking position; and the locking element is displaced radially outward to A sleeve that is displaceable in the axial direction of the peripheral wall is provided between the pressing release position allowing the release position. On the other hand, the male pipe joint has an insertion part to be inserted into the receiving part of the female pipe joint, and receives a locking element on the outer peripheral surface of the insertion part, and locks the insertion part into the receiving part. For locking recess. In this pipe joint, the male and female pipe joints are connected and disconnected by displacing the sleeve in the axial direction of the female pipe joint. As this type of pipe joint, there is one disclosed in Patent Document 1.

このような管継手を用いている場合、金型取り替えのために、この管継手の連結を解除すると、熱媒体油が漏れ出して当該管継手の周囲に付着するが、この漏れ出た熱媒体油が上述のスリーブと雌型本体の周壁との間の空間に入り時間が経過すると、熱媒体油の粘性が高くなり、スリーブが雌型本体の周壁に固着してしまい、当該管継手の連結・連結解除操作ができなくなることがある。また、金型には離型剤としての油を金型に吹き付けるが、この離型剤も上述のスリーブ固着の原因となる。   When such a pipe joint is used, when the connection of this pipe joint is released for mold replacement, the heat medium oil leaks out and adheres to the periphery of the pipe joint. When the oil enters the space between the sleeve and the peripheral wall of the female main body and the time elapses, the viscosity of the heat transfer oil increases, and the sleeve adheres to the peripheral wall of the female main body.・ The disconnection operation may not be possible. In addition, oil as a mold release agent is sprayed onto the mold, and this mold release agent also causes the above-described fixing of the sleeve.

特開２００６−３１６９８３JP 2006-316983 A

本発明は、上記のような点に鑑み、スリーブと雌型本体の周壁との間に油が付着したとしても、スリーブと周壁との間の固着が生じないようにした管継手を提供することを目的としている。   In view of the above, the present invention provides a pipe joint that prevents the sleeve and the peripheral wall from sticking even if oil adheres between the sleeve and the peripheral wall of the female main body. It is an object.

本発明は、
雌型管継手（以下に述べる実施形態では参照番号１２を付して示す）と該雌型管継手に挿入連結される雄型管継手（１４）とからなる管継手（１０）であって、
該雌型管継手（１２）が、
雄型管継手（１４）を受け入れる受入部（２４）を画定する筒状の周壁（２６）を有し、該周壁にその半径方向を貫通するように施錠子孔（２８）が形成されている雌型本体（１８）、
該施錠子孔（２８）に半径方向で変位可能で、一部が該受入部（２４）内に挿入される施錠位置と、該施錠位置よりも外側に変位した解放位置との間で変位可能とされた施錠子（３０）、及び、
該周壁（２６）の外周面上に取り付けられたスリーブ（２０）であって、その内周面が該施錠子（３０）を半径方向外側から押圧して該施錠子（３０）を該施錠位置とする施錠子押圧凸部（３２）と、該施錠子押圧凸部（３２）に該周壁の軸線方向で隣接して設けられ該施錠子（３０）が半径方向外側に変位して該解放位置となるのを許容する施錠子解放凹部（３６）とを有し、当該スリーブ（２０）が、該施錠子押圧凸部（３２）が該施錠子（３０）の半径方向外側位置となって該施錠子（３０）を該施錠位置とする施錠子押圧位置と、該施錠子解放凹部（３６）が該施錠子の半径方向外側位置となって該施錠子が該解放位置となるのを許容する施錠子押圧解除位置との間で当該周壁（２６）の軸線方向で変位可能なスリーブ（２０）を有し、
該雄型管継手が、
該雌型管継手の受入部（２４）内に挿入される挿入部（２２）を有し、該挿入部の外周面に、該施錠子（３０）を受け入れて、当該挿入部（２２）を該受入部（２４）内に施錠するための施錠凹部（５０）を有し、
該雌型本体の周壁（２６）の外周面が、該スリーブ（２０）の内周面の錠子押圧凸部（３２）と摺動係合される摺動領域（５６）と、該摺動領域（５６）よりも小さな半径とされて該スリーブの内周面の錠子押圧凸部との間に空間（Ｓ）を形成する空間形成領域（５８）とを有し、該施錠子孔（２８）が該摺動領域（５６）に開口するように形成されている管継手を提供する。 The present invention
A pipe joint (10) comprising a female pipe joint (indicated by reference numeral 12 in the embodiment described below) and a male pipe joint (14) inserted and connected to the female pipe joint,
The female pipe joint (12)
A cylindrical peripheral wall (26) defining a receiving portion (24) for receiving the male pipe joint (14) is formed, and a locker hole (28) is formed in the peripheral wall so as to penetrate the radial direction thereof. Female body (18),
The locking element hole (28) can be displaced in the radial direction and can be displaced between a locking position where a part is inserted into the receiving portion (24) and a release position displaced outward from the locking position. Locking element (30), and
A sleeve (20) mounted on the outer peripheral surface of the peripheral wall (26), the inner peripheral surface of which presses the locking element (30) from the outside in the radial direction to bring the locking element (30) into the locking position. The locking element pressing convex part (32) and the locking element pressing convex part (32) provided adjacent to each other in the axial direction of the peripheral wall, the locking element (30) being displaced radially outwardly to the release position A locking element releasing recess (36) that allows the locking element to be formed, and the sleeve (20) has the locking element pressing projection (32) positioned radially outward of the locking element (30). The locking element pressing position with the locking element (30) as the locking position, and the locking element release recess (36) allowing the locking element to be in the radially outward position of the locking element and allowing the locking element to be in the release position. There is a sleeve (20) that can be displaced in the axial direction of the peripheral wall (26) between the locking element pressing release position. ,
The male fitting is
The insertion part (22) inserted into the receiving part (24) of the female pipe joint has an insertion part (22), and the locking part (30) is received on the outer peripheral surface of the insertion part. A locking recess (50) for locking in the receiving part (24);
A sliding region (56) in which the outer peripheral surface of the peripheral wall (26) of the female main body is slidably engaged with the lock pressing convex portion (32) of the inner peripheral surface of the sleeve (20); A space-forming region (58) having a radius smaller than that of the region (56) and forming a space (S) between the sleeve pressing convex portion on the inner peripheral surface of the sleeve, 28) provides a fitting that is formed to open into the sliding region (56).

この管継手においては、雌型管継手の周壁の外周面の摺動領域（５６）がスリーブの内周面の施錠子押圧凸部（３２）と摺動係合することにより、該スリーブが円滑に摺動することができるようにすると共に、同外周面に空間形成領域（５８）を形成することにより、該外周面とスリーブの施錠子押圧凸部（３２）との間に油が入り込んだとしても、該油による周壁外周面とスリーブとの固着が生じにくくすることを可能としている。   In this pipe joint, the sliding region (56) of the outer peripheral surface of the peripheral wall of the female pipe joint is slidably engaged with the locking element pressing convex part (32) of the inner peripheral surface of the sleeve, so that the sleeve is smooth. By forming a space forming region (58) on the outer peripheral surface, oil has entered between the outer peripheral surface and the locking element pressing convex portion (32) of the sleeve. However, it is possible to make it difficult for the oil to adhere to the outer peripheral surface of the peripheral wall and the sleeve.

具体的には、該雌型本体（１８）の周壁（２６）に設けられる該施錠子孔（２８）は、周方向で相互に間隔をあけて少なくとも２つ設けられ、該摺動領域（５６）が各施錠孔の開口を囲むように少なくとも２つ設けられ、該空間形成領域（５８）が、該摺動領域（５６）の間に形成されるようにすることができる。   Specifically, at least two locker holes (28) provided in the peripheral wall (26) of the female main body (18) are provided at intervals in the circumferential direction, and the sliding region (56 ) Are provided so as to surround the openings of the respective locking holes, and the space forming region (58) is formed between the sliding regions (56).

より具体的には、雌型本体の周壁（２６）の外周面が全体的に円筒状とされ、該円筒状の外周面の一部を切削したような形態で平面を形成し、該平面を該空間形成領域（５８）とし、他の領域（５６）を摺動領域とすることができる。   More specifically, the outer peripheral surface of the peripheral wall (26) of the female mold body is entirely cylindrical, and a plane is formed in such a form that a part of the cylindrical outer peripheral surface is cut. The space formation region (58) can be used, and the other region (56) can be a sliding region.

該スリーブの内周面が、全体的に円筒状とされ、該雌型管継手（１２）が該雄型管継手（１４）を受け入れる方向を基準にして、該施錠子押圧凸部（３２）の手前側に該施錠子解放凹部（３６）を有し、該施錠子押圧凸部（３２）の奥側に該施錠子押圧凸部よりも内径の大きいバネ収納凹部（３７）を有し、該スリーブ（２０）が、該バネ収納凹部に収納されて該スリーブと該雌型本体の間に設定されたバネ（３４）により該施錠子押圧位置に付勢するようにされ、該バネに抗して該スリーブ（２０）を後方に変位させることにより該スリーブを該施錠子押圧位置から該施錠子解放位置に変位可能とされており、
該雌型本体（１８）が、該施錠子押圧位置にあるスリーブ（２０）の円筒状の内周面の後端部分と係合し、後方に変位されるスリーブ（２０）の内周面と摺動係合する環状突起部（６０）を有し、該環状突起部が該スリーブの軸線方向で見て多角形状とされてスリーブの円筒状の内周面の周方向で間隔をあけた位置で係合されるようにすることができる。これも油がスリーブの内周面と雌型本体の外周面との間に入って、スリーブの動きに支障となることを抑制するためである。 The inner peripheral surface of the sleeve is generally cylindrical, and the locking element pressing protrusion (32) is based on the direction in which the female pipe joint (12) receives the male pipe joint (14). The locking element release recess (36) on the front side of the locking element, and a spring housing recess (37) having an inner diameter larger than that of the locking element pressing protrusion on the back side of the locking element pressing protrusion (32), The sleeve (20) is housed in the spring housing recess and is urged to the locking element pressing position by a spring (34) set between the sleeve and the female main body to resist the spring. Then, the sleeve (20) is displaced rearward so that the sleeve can be displaced from the locking element pressing position to the locking element release position,
The female main body (18) engages with the rear end portion of the cylindrical inner peripheral surface of the sleeve (20) at the locking element pressing position, and the inner peripheral surface of the sleeve (20) is displaced rearward. A position having an annular protrusion (60) that is slidably engaged, the annular protrusion being polygonal when viewed in the axial direction of the sleeve, and being spaced apart in the circumferential direction of the cylindrical inner peripheral surface of the sleeve Can be engaged. This is also to prevent oil from entering between the inner peripheral surface of the sleeve and the outer peripheral surface of the female main body and hindering the movement of the sleeve.

更に、該スリーブ（２０）が該施錠子押圧解除位置とされたときに、該雌型本体（１８）の環状突起部（６０）よりも後方に延びる該スリーブ（２０）の部分に対応する該雌型本体の外周面を環状凹部（６２）とすることもできる。これも油がスリーブの内周面と雌型本体の外周面との間に入って、スリーブの動きに支障となることを抑制するためである。   Further, when the sleeve (20) is in the locker pressing release position, the sleeve (20) corresponding to a portion of the sleeve (20) extending rearward from the annular protrusion (60) of the female main body (18). The outer peripheral surface of the female mold main body may be an annular recess (62). This is also to prevent oil from entering between the inner peripheral surface of the sleeve and the outer peripheral surface of the female main body and hindering the movement of the sleeve.

該空間形成部（５８）が該摺動領域（５６）の並行に延び、該摺動領域（５６）よりも後方まで延びるようにすることができる。雌型本体（２８）の外周面とスリーブ（２０）の内周面との間に形成される空間（Ｓ）をより大きくとるためである。   The space forming portion (58) may extend in parallel with the sliding area (56) and extend further to the rear than the sliding area (56). This is because the space (S) formed between the outer peripheral surface of the female main body (28) and the inner peripheral surface of the sleeve (20) can be made larger.

以下、本発明に係る管継手を添付図面に示した実施形態に基づき説明する。   Hereinafter, a pipe joint concerning the present invention is explained based on an embodiment shown in an accompanying drawing.

図１は、本発明に係る管継手の縦断面図で、雌型管継手及び雄型管継手が連結されている状態を示す。FIG. 1 is a longitudinal sectional view of a pipe joint according to the present invention, showing a state in which a female pipe joint and a male pipe joint are connected. 図２は、同管継手の縦断面図で、雌型管継手及び雄型管継手が分離されている状態を示す。FIG. 2 is a longitudinal sectional view of the pipe joint, showing a state where the female pipe joint and the male pipe joint are separated. 図３は、雌型管継手を示す図で、（Ａ）雌型管継手の上半部手前側を切り欠いて示した側面図、（Ｂ）は（Ａ）における３Ｂ−３Ｂ線に沿ってみた図である。3A and 3B are views showing a female pipe joint, in which FIG. 3A is a side view of the female pipe joint cut out from the front side of the upper half, and FIG. 3B is taken along line 3B-3B in FIG. FIG. 図４は、雌型本体の側面図である。FIG. 4 is a side view of the female main body.

図１及び図２に示すように、本発明に係る管継手１０は、雌型管継手１２と該雌型管継手１２に挿入連結される雄型管継手１４とからなる。   As shown in FIGS. 1 and 2, the pipe joint 10 according to the present invention includes a female pipe joint 12 and a male pipe joint 14 inserted and connected to the female pipe joint 12.

雌型管継手１２は、前後方向に延びる貫通孔１６を有する全体として筒状の雌型本体１８と、該雌型本体上に摺動可能に取り付けられるスリーブ２０とを有する。具体的には、雌型本体１８は、雄型管継手１４の挿入部２２（図２）を受け入れる受入部２４を画定する筒状の周壁２６にその半径方向で貫通する施錠子孔２８を有している。施錠子孔２８内には球形の施錠子３０が設けられており、該施錠子３０は施錠子孔２８内において半径方向で変位可能で、一部が受入部２４内に挿入される施錠位置（図１乃至図３）と、該施錠位置よりも外側に変位した解放位置との間で変位可能とされている。   The female pipe joint 12 has a generally cylindrical female main body 18 having a through-hole 16 extending in the front-rear direction, and a sleeve 20 slidably mounted on the female main body. Specifically, the female main body 18 has a locking hole 28 penetrating in a radial direction in a cylindrical peripheral wall 26 that defines a receiving portion 24 that receives the insertion portion 22 (FIG. 2) of the male pipe joint 14. doing. A spherical locking element 30 is provided in the locking element hole 28, and the locking element 30 can be displaced in the radial direction in the locking element hole 28, and a locking position where a part is inserted into the receiving portion 24 ( 1 to 3) and a release position displaced outward from the locking position.

スリーブ２０は、雌型本体１８の周壁２６の外周面上に当該周壁２６の軸線方向で摺動可能に設けられている。スリーブ２０の内周面は、施錠子３０を半径方向外側から押圧して施錠子を上記施錠位置とする環状の施錠子押圧凸部３２、施錠子凸部３２の前側にあり施錠子３０が半径方向外側に変位して解放位置となるのを許容する環状の施錠子解放凹部３６，施錠子凸部３２の後側にある環状のバネ収納凹部３７を有する。該スリーブ２０は、バネ収納凹部３７内に配置された圧縮コイルバネ３４により、該施錠子押圧凸部３２が施錠子３０を半径方向外側に位置して、該施錠子を押圧する押圧位置に付勢されており、作業者が圧縮コイルバネ３４に抗してスリーブ２０を図２で見て左方に変位させることにより、施錠子解放凹部３６が施錠子３０の半径方向外側位置となって該施錠子３０が解放位置に変位可能とする押圧解除位置となることができるようになっている。   The sleeve 20 is provided on the outer peripheral surface of the peripheral wall 26 of the female main body 18 so as to be slidable in the axial direction of the peripheral wall 26. The inner peripheral surface of the sleeve 20 is located on the front side of the annular locking element pressing convex part 32 and the locking element convex part 32 in which the locking element 30 is pressed from the outside in the radial direction so that the locking element is in the locking position. It has an annular lock release recess 36 that allows it to be displaced outwardly in the direction and an annular spring housing recess 37 on the rear side of the lock projection 32. The sleeve 20 is urged by a compression coil spring 34 disposed in the spring housing recess 37 to a pressing position where the locking element pressing protrusion 32 presses the locking element with the locking element 30 positioned radially outward. When the operator displaces the sleeve 20 to the left as viewed in FIG. 2 against the compression coil spring 34, the locking element release recess 36 becomes the radially outer position of the locking element 30. 30 can become a press release position which can be displaced to a release position.

雌型本体１８の周壁２６の外周面は、図３の（Ｂ）に最もよく示すように、スリーブ２０内周面の施錠子押圧凸部３２と摺動係合される摺動領域５６と、摺動領域５６によりも小さな半径とされてスリーブ２０の施錠子押圧凸部３２との間に空間Ｓを形成する空間形成領域５８とを有し、施錠子孔２８が摺動領域５６に開口するように形成されている。本実施形態においては、全体として円筒形とされた周壁２６の外周面に対して、施錠子２８が設けられている図３Ｂで見て上下左右の部分を上記摺動領域５６として残し、それらの間を切削して雌型本体１８の軸線に平行な図４で見て矩形状の面として、これを空間形成領域５８としている。具体的には、周壁２６の外周面は、スリーブ２０の内周面の施錠子押圧凸部３２が摺動する摺動領域５６と、該摺動領域５６の軸線方向後側に隣接して設けられた該摺動領域５６よりも大きな直径とされてスリーブの施錠子押圧凸部３２が該摺動領域よりも後方へ変位するのを阻止するためのスリーブ変位阻止領域５９とを有しており、空間形成領域５８は該スリーブ変位阻止領域５９まで延びるように形成され、スリーブの施錠子押圧凸部３２が移動可能な範囲よりも後方に長く延びるように形成されている（図４）。   The outer peripheral surface of the peripheral wall 26 of the female main body 18 is, as best shown in FIG. 3B, a sliding region 56 that is slidably engaged with the locking element pressing convex portion 32 on the inner peripheral surface of the sleeve 20; It has a space forming area 58 that has a smaller radius than the sliding area 56 and forms a space S with the locking element pressing projection 32 of the sleeve 20, and the locking element hole 28 opens into the sliding area 56. It is formed as follows. In the present embodiment, the upper and lower and left and right portions of the outer peripheral surface of the peripheral wall 26 having a cylindrical shape as a whole as viewed in FIG. A space forming region 58 is formed as a rectangular surface as viewed in FIG. 4 parallel to the axis of the female main body 18 by cutting the gap. Specifically, the outer peripheral surface of the peripheral wall 26 is provided adjacent to the sliding region 56 in which the locking element pressing convex portion 32 on the inner peripheral surface of the sleeve 20 slides, and the rear side in the axial direction of the sliding region 56. And a sleeve displacement prevention region 59 for preventing the sleeve locking projection pressing portion 32 from being displaced rearward from the sliding region. The space forming region 58 is formed so as to extend to the sleeve displacement prevention region 59, and is formed so as to extend rearward longer than the movable range of the locking element pressing convex portion 32 of the sleeve (FIG. 4).

雌型本体１８の外周面は、スリーブ２０が図１乃至３の位置にあるときにスリーブ２０の後端部分内周面が係合する環状突起部６０を有しており、該環状突起部６０は雌型本体の軸線の周りで正六角形とされて、その六カ所の角部分で、スリーブ２０の後端部分内周面と摺動係合するようにされている。雌型本体１８の外周面は更に、該環状突起部６０に隣接する後側に環状凹部６２を有しており、スリーブ２０が後方に変位されるときに、この環状凹部６２の部分では、該スリーブ２０の内周面が雌型本体１８の外周面と係合しないようにされている。これら環状突起部６０の六角形の形状及び環状凹部６２は、スリーブ２０の内周面と雌型本体１８の外周面との間に油が付着しても、スリーブ２０を前後方向で変位させるのに余り影響を与えないようにするためのものである。   The outer peripheral surface of the female main body 18 has an annular protrusion 60 with which the inner peripheral surface of the rear end portion of the sleeve 20 engages when the sleeve 20 is in the position shown in FIGS. Is formed in a regular hexagon around the axis of the female main body, and is slidably engaged with the inner peripheral surface of the rear end portion of the sleeve 20 at the six corners. The outer peripheral surface of the female main body 18 further has an annular recess 62 on the rear side adjacent to the annular protrusion 60. When the sleeve 20 is displaced rearward, The inner peripheral surface of the sleeve 20 is not engaged with the outer peripheral surface of the female main body 18. The hexagonal shape of the annular protrusion 60 and the annular recess 62 displace the sleeve 20 in the front-rear direction even when oil adheres between the inner peripheral surface of the sleeve 20 and the outer peripheral surface of the female mold body 18. This is intended to prevent the influence on the product from being affected.

雌型管継手１２の貫通孔１６内にはバルブ支持部材４０によって該貫通孔１６の軸線方向で変位可能とされたバルブ４２が支持されている。該バルブ４２は、圧縮コイルバネ４４によって、バルブシート４６に押圧されて密封係合されている。   A valve 42 that is displaceable in the axial direction of the through hole 16 is supported in the through hole 16 of the female pipe joint 12 by a valve support member 40. The valve 42 is pressed against the valve seat 46 by a compression coil spring 44 and is sealingly engaged.

雄型管継手１４は、該雌型管継手１２の受入部２４内に挿入される挿入部２２の外周面に、施錠子３０を受け入れて、当該挿入部２２を受入部２４内に施錠するための環状の施錠凹部５０を有する。雄型管継手１４は前後方向で貫通する貫通孔５２を有しており、雌型管継手１２と同様のバルブ５４、バルブシート５５、圧縮コイルバネ５７を備えている。   The male pipe joint 14 receives the locking element 30 on the outer peripheral surface of the insertion part 22 inserted into the receiving part 24 of the female pipe joint 12, and locks the insertion part 22 into the receiving part 24. The annular locking recess 50 is provided. The male pipe joint 14 has a through hole 52 that penetrates in the front-rear direction, and includes a valve 54, a valve seat 55, and a compression coil spring 57 similar to the female pipe joint 12.

本発明に係る管継手の上述のように構成されるものであり、スリーブ２０の内周面と雌型本体１８の周壁２６の外周面との間に前述の熱媒体油などが入ったとしても、それらの間に空間Ｓが形成されているために該熱媒体油によるスリーブ２０と周壁２６との間の固着は生じにくくなる。   Even if the above-described heat medium oil or the like enters between the inner peripheral surface of the sleeve 20 and the outer peripheral surface of the peripheral wall 26 of the female main body 18, the pipe joint according to the present invention is configured as described above. Since the space S is formed between them, the heat medium oil hardly adheres between the sleeve 20 and the peripheral wall 26.

本発明に係る管継手を、アルミダイカストに対する熱媒体油の供給排出管路に用いる次のような実験を行った。
熱媒体油：バーレルサーム４００（登録商標）
油温度：２８０℃
油圧力：０．５MPa以下
管継手の着脱頻度：２〜３日に一回（金型交換時）
運転状況：当初は１８時間／日
末期は８時間／日
使用環境：管継手の着脱は温調ポンプを止め、温度が低い状態で行う。
一回の成形毎に離型剤をふりかける。
実験結果：従来品では１〜２ヶ月でスリーブが動かなくなった。
本発明に係る管継手では、略９ヶ月使用後も作業者の手でスリーブを動かし、管継手の着脱が可能であった。
以上、本発明に係る管継手を添付図面に示した実施形態に基づき説明したが、本発明はこれに限定されるものではなく、例えば、空間形成領域は切削に限らず、その他の成形方法によって形成することが可能である。 The following experiment was conducted in which the pipe joint according to the present invention was used for the supply / discharge pipe of the heat medium oil to the aluminum die casting.
Heat transfer oil: Barrel Therm 400 (registered trademark)
Oil temperature: 280 ° C
Hydraulic pressure: 0.5 MPa or less Frequency of fitting / removing of pipe fittings: Once every 2-3 days (when changing mold)
Driving situation: Initially 18 hours / day
The last stage is 8 hours / day. Use environment: Pipe fittings should be attached and detached with the temperature control pump stopped and at low temperature.
Sprinkle the release agent after each molding.
Experimental result: In the conventional product, the sleeve stopped moving in 1 to 2 months.
In the pipe joint according to the present invention, it was possible to attach and detach the pipe joint by moving the sleeve by the operator's hand even after use for about 9 months.
As mentioned above, although the pipe joint which concerns on this invention was demonstrated based on embodiment shown to an accompanying drawing, this invention is not limited to this, For example, a space formation area | region is not restricted to cutting, By other shaping | molding methods It is possible to form.

管継手１０；雌型管継手１２；雄型管継手１４；貫通孔１６；雌型本体１８；スリーブ２０；挿入部２２；受入部２４；周壁２６；施錠子孔２８；施錠子３０；施錠子押圧凸部３２；圧縮コイルバネ３４；施錠子解放凹部３６；バネ収納凹部３７；バルブ支持部材４０；バルブ４２；圧縮コイルバネ４４；バルブシート４６；施錠凹部５０；貫通孔５２；バルブ５４；バルブシート５５；摺動領域５６；圧縮コイルバネ５７；空間形成領域５８；環状突起部６０；環状凹部６２；空間Ｓ   Pipe joint 10; Female pipe joint 12; Male pipe joint 14; Through hole 16; Female body 18; Sleeve 20; Insert part 22; Receiving part 24; Peripheral wall 26; Press projection 32; compression coil spring 34; locker release recess 36; spring storage recess 37; valve support member 40; valve 42; compression coil spring 44; valve seat 46; Sliding region 56; compression coil spring 57; space forming region 58; annular projection 60; annular recess 62; space S;

Claims (5)

雌型管継手と該雌型管継手に挿入連結される雄型管継手とからなる管継手であって、
該雌型管継手が、
雄型管継手を受け入れる受入部を画定する筒状の周壁を有し、該周壁にその半径方向を貫通するように施錠子孔が形成されている雌型本体、
該施錠子孔に半径方向で変位可能で、一部が該受入部内に挿入される施錠位置と、該施錠位置よりも外側に変位した解放位置との間で変位可能とされた施錠子、及び、
該周壁の外周面上に取り付けられたスリーブであって、その内周面が該施錠子を半径方向外側から押圧して該施錠子を該施錠位置とする施錠子押圧凸部と、該施錠子押圧凸部に該周壁の軸線方向で隣接して設けられ該施錠子が半径方向外側に変位して該解放位置となるのを許容する施錠子解放凹部とを有し、当該スリーブが、該施錠子押圧凸部が該施錠子の半径方向外側位置となって該施錠子を該施錠位置とする施錠子押圧位置と、該施錠子解放凹部が該施錠子の半径方向外側位置となって該施錠子が該解放位置となるのを許容する施錠子押圧解除位置との間で当該周壁の軸線方向で変位可能なスリーブを有し、
該雄型管継手が、
該雌型管継手の受入部内に挿入される挿入部を有し、該挿入部の外周面に、該施錠子を受け入れて、当該挿入部を該受入部内に施錠するための施錠凹部を有し、
該雌型本体の周壁の外周面が、該スリーブの内周面の施錠子押圧凸部と摺動係合される摺動領域と、該摺動領域よりも小さな半径とされて該スリーブの内周面の施錠子押圧凸部との間に空間を形成する空間形成領域とを有し、該空間形成領域が該摺動領域に並行に延び、該摺動領域よりも後方まで延びるようにされ、該施錠子孔が該摺動領域に開口するように形成されている管継手。 A pipe joint comprising a female pipe joint and a male pipe joint inserted and connected to the female pipe joint,
The female fitting is
A female main body having a cylindrical peripheral wall defining a receiving portion for receiving a male pipe joint, and having a locking hole formed in the peripheral wall so as to penetrate the radial direction;
A lock element that is displaceable in a radial direction in the lock element hole, and is displaceable between a lock position in which a part is inserted into the receiving portion and a release position displaced outward from the lock position; and ,
A sleeve attached on the outer peripheral surface of the peripheral wall, the inner peripheral surface of which presses the locker from the outside in the radial direction and makes the locker the locking position; and the locker A locking element releasing recess provided adjacent to the pressing protrusion in the axial direction of the peripheral wall and allowing the locking element to be displaced radially outward to the released position, and the sleeve includes the locking element The locking element pressing convex portion serves as the radially outer position of the locking element, and the locking element pressing position with the locking element as the locking position, and the locking element release recess serves as the radially outer position of the locking element. Having a sleeve displaceable in the axial direction of the peripheral wall between the locking element pressing release position allowing the child to be in the release position,
The male fitting is
It has an insertion part to be inserted into the receiving part of the female pipe joint, and has a locking recess for receiving the locking element and locking the insertion part in the receiving part on the outer peripheral surface of the insertion part. ,
The outer peripheral surface of the peripheral wall of the female main body has a sliding area that is slidably engaged with the locking element pressing convex portion of the inner peripheral surface of the sleeve, and a radius smaller than the sliding area. A space forming region that forms a space between the circumferential surface and the locking element pressing convex portion, and the space forming region extends in parallel to the sliding region and extends further to the rear than the sliding region. , the pipe joint該施Joko hole is formed so as to open the sliding region. 該雌型本体の周壁に設けられる該施錠子孔は、周方向で相互に間隔をあけて少なくとも２つ設けられ、該摺動領域が各施錠子孔の開口を囲むように少なくとも２つ設けられ、該空間形成領域が、該摺動領域の間に形成されている請求項１に記載の管継手。   At least two locking holes provided in the peripheral wall of the female main body are provided at intervals in the circumferential direction, and at least two locking areas are provided so as to surround the opening of each locking hole. The pipe joint according to claim 1, wherein the space forming region is formed between the sliding regions. 該雌型本体の周壁の外周面が、全体的に円筒状とされ、該円筒状の外周面の一部を切削したような形態で平面を形成し、該平面を該空間形成領域とし、他の領域を摺動領域とした請求項１又は２に記載の管継手。   The outer peripheral surface of the peripheral wall of the female mold body is generally cylindrical, and a plane is formed in such a form that a part of the cylindrical outer peripheral surface is cut, and the plane is used as the space forming region. The pipe joint according to claim 1 or 2, wherein the region is a sliding region. 該スリーブの内周面が、全体的に円筒状とされ、該雌型管継手が該雄型管継手を受け入れる方向を基準にして、該施錠子押圧凸部の手前側に該施錠子解放凹部を有し、該施錠子押圧凸部の奥側に該施錠子押圧凸部よりも内径の大きいバネ収納凹部を有し、該スリーブが、該バネ収納凹部に収納されて該スリーブと該雌型本体の間に設定されたバネにより該施錠子押圧位置に付勢するようにされ、該バネに抗して該スリーブを後方に変位させることにより該スリーブを該施錠子押圧位置から該施錠子解放位置に変位可能とされており、
該雌型本体が、該施錠子押圧位置にあるスリーブの円筒状の内周面の後端部分と係合し、後方に変位されるスリーブの内周面と摺動係合する環状突起部を有し、該環状突起部が該スリーブの軸線方向で見て多角形状とされてスリーブの円筒状の内周面の周方向で間隔をあけた位置で係合されるようにした請求項１乃至３のいずれかに記載の管継手。 The inner peripheral surface of the sleeve is generally cylindrical, and the locking element release recess is formed on the front side of the locking element pressing protrusion with respect to the direction in which the female pipe fitting receives the male fitting. A spring accommodating recess having an inner diameter larger than that of the locking element pressing convex part on the back side of the locking element pressing convex part, and the sleeve is accommodated in the spring accommodating concave part and the sleeve and the female mold A spring set between the main bodies is urged to the locking element pressing position, and the sleeve is moved backward from the locking element pressing position by displacing the sleeve against the spring. The position can be displaced,
The female main body has an annular protrusion that engages with the rear end portion of the cylindrical inner peripheral surface of the sleeve at the locking element pressing position and slides and engages with the inner peripheral surface of the sleeve that is displaced rearward. The annular projecting portion has a polygonal shape when viewed in the axial direction of the sleeve, and is engaged at a position spaced in the circumferential direction of the cylindrical inner peripheral surface of the sleeve. 4. The pipe joint according to any one of 3. 該スリーブが該施錠子押圧解除位置とされたときに、該雌型本体の環状突起部よりも後方に延びる該スリーブの部分に対応する該雌型本体の外周面が環状凹部とされている請求項４に記載の管継手。
The outer peripheral surface of the female main body corresponding to the portion of the sleeve that extends rearward from the annular protrusion of the female main body is an annular recess when the sleeve is in the locking element pressing release position. Item 5. The pipe joint according to Item 4.
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