JPH06201081A - Pipe joint - Google Patents
Pipe jointInfo
- Publication number
- JPH06201081A JPH06201081A JP4348074A JP34807492A JPH06201081A JP H06201081 A JPH06201081 A JP H06201081A JP 4348074 A JP4348074 A JP 4348074A JP 34807492 A JP34807492 A JP 34807492A JP H06201081 A JPH06201081 A JP H06201081A
- Authority
- JP
- Japan
- Prior art keywords
- pipe joint
- cap nut
- joint body
- pipe
- recess
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Joints With Pressure Members (AREA)
- Joints That Cut Off Fluids, And Hose Joints (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、給水管、給湯管など
の用途に用いられる、合成樹脂管、金属管などを接続す
るための管継手に係わり、詳しくは、袋ナットを用いて
合成樹脂管、金属管を接続する際の締付けにより、ねじ
部が変形や破損するおそれのない管継手に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint for connecting synthetic resin pipes, metal pipes, etc. used for water supply pipes, hot water supply pipes, etc. The present invention relates to a pipe joint in which a threaded portion is not deformed or damaged by tightening when connecting a pipe or a metal pipe.
【０００２】[0002]
【従来の技術】給水管、給湯管などの用途に用いられ
る、合成樹脂管、金属管などは、容易に離脱しないよう
に、例えば、実開昭６１−２２９１号公報に開示されて
いるように、接続管の端部同士を管継手を介してねじ結
合により接続する方法が、比較的簡便であり、しかも強
固な締結力が得られることから、よく用いられている。2. Description of the Related Art Synthetic resin pipes, metal pipes, etc. used for water supply pipes, hot water supply pipes, etc. are designed so as not to be easily separated, for example, as disclosed in Japanese Utility Model Laid-Open No. 61-2291. The method of connecting the ends of the connecting pipes by screw connection through a pipe joint is often used because it is relatively simple and a strong fastening force can be obtained.
【０００３】上記の方法において用いられる管継手は、
管継手本体、袋ナット及び接続筒体とからなり、管継手
本体は、一方の接続管の端部が内挿される円筒部と、こ
の円筒部の一端部から外周方向へ一体に突設された鍔部
とを備え、円筒部の外周に雄ねじが形成され、その先端
が縮径し得るように切り欠きが設けられている。また、
袋ナットは、管継手本体の雄ねじ部に螺合する雌ねじ部
が先端内周に形成され、基部内周にテーパーが設けられ
ている。The pipe joint used in the above method is
It consists of a pipe joint body, a cap nut, and a connecting cylinder body. The pipe joint body is integrally provided with a cylindrical portion into which one end of one connecting pipe is inserted, and from one end of this cylindrical portion toward the outer peripheral direction. A flange is provided, a male screw is formed on the outer periphery of the cylindrical portion, and a notch is provided so that the tip can be reduced in diameter. Also,
The cap nut has a female threaded portion that is screwed into the male threaded portion of the pipe joint body on the inner circumference of the tip, and has a taper on the inner circumference of the base.
【０００４】さらに、接続筒体は、他方の接続管の端部
が螺合される雄ねじ部、管継手本体の鍔部内に係合され
るナット部、及び雄ねじ部の反対側の端部が案内部とさ
れている。なお、接続に当たっては、この接続筒の案内
部の外周面にパッキングが装着される。接続筒体は、そ
の接続筒体のナット部に管継手本体の鍔部を外側から嵌
合させることにより、管継手本体に組み込まれる。Further, in the connecting cylinder, the male screw portion to which the end portion of the other connecting pipe is screwed, the nut portion to be engaged in the collar portion of the pipe joint body, and the end portion on the opposite side of the male screw portion are guided. It is considered a division. When connecting, packing is attached to the outer peripheral surface of the guide portion of the connecting tube. The connection tube body is incorporated in the pipe joint body by fitting the flange portion of the pipe joint body into the nut portion of the connection tube body from the outside.
【０００５】そして、管の接続にあたっては、一方の接
続管を接続筒体の雌ねじ部に螺合する。続いて、他方の
接続管の端部を、接続筒体の案内部と管継手本体の円筒
部との間に挿入する。なお、袋ナットは接続管に外嵌し
ておく。次いで、袋ナットの雌ねじ部を管継手本体の雄
ねじ部に螺合し、袋ナットの先端が管継手本体の鍔部端
面に当接するまで袋ナットを締付ける。When connecting the pipes, one of the connecting pipes is screwed into the female screw portion of the connecting cylinder. Then, the end portion of the other connecting pipe is inserted between the guide portion of the connecting cylinder body and the cylindrical portion of the pipe joint body. The cap nut is externally fitted on the connecting pipe. Next, the female screw part of the cap nut is screwed into the male screw part of the pipe joint body, and the cap nut is tightened until the tip of the cap nut comes into contact with the flange end face of the pipe joint body.
【０００６】袋ナットが管継手本体側へ移動するにつれ
て、袋ナットのテーパー部により管継手本体の円筒部先
端が内方へ押圧され、円筒部先端の切欠部が縮径する。
その結果、円筒部先端の切欠部が接続管の外面を全周に
わたって押圧し、接続管の内周面は接続筒の案内部の外
周面に装着したパッキングに圧接して止水構造が形成さ
れ、接続が終了する。As the cap nut moves toward the pipe joint body side, the tapered portion of the cap nut pushes the tip of the cylindrical portion of the pipe joint body inward, and the notch at the tip of the cylindrical portion contracts.
As a result, the notch at the tip of the cylindrical portion presses the outer surface of the connecting pipe over the entire circumference, and the inner peripheral surface of the connecting pipe is pressed against the packing attached to the outer peripheral surface of the guide portion of the connecting cylinder to form a water blocking structure. , The connection is closed.
【０００７】ところで、給湯管のような管の接続は、天
井裏、床下等の狭くて暗い場所に配管される。そのた
め、袋ナットを管継手本体に対して相対的に回転させて
鍔部の端面に袋ナットの先端面を当接させる際、端面同
士が突き当たったことを視認することができない。By the way, the connection of a pipe such as a hot water supply pipe is made in a narrow and dark place such as a space under the ceiling or under the floor. Therefore, when the cap nut is rotated relative to the pipe joint main body and the tip end face of the cap nut is brought into contact with the end face of the flange portion, it is not possible to visually recognize that the end faces abut.
【０００８】そこで、袋ナットを注意しつつ徐々に締付
け、袋ナットの端面が管継手本体の鍔部端面に当接した
後の締付け抵抗の上昇を、スパナ等の工具を介して手で
関知して締付けを止めていた。Therefore, the cap nut is gradually tightened carefully, and the increase in the tightening resistance after the end face of the cap nut comes into contact with the end face of the flange portion of the pipe joint body is manually detected through a tool such as a spanner. Had stopped tightening.
【０００９】しかし、工具に作用する締付け抵抗は、徐
々に且つ連続的に上昇するので、適切な最終締付け時点
が分からず、袋ナットの端面が管継手本体の鍔部端面に
当接しているにもかかわらず、さらに袋ナットを締付け
てしまうことがあった。この袋ナットの過剰締付けによ
って、ねじ部が変形したり、破損してしまい、袋ナット
が所定位置から後退して、袋ナットによる接続管の締付
け力が低下し、接続部のシールが完全なものとならず、
液体が漏れる恐れがあった。However, since the tightening resistance acting on the tool gradually and continuously rises, an appropriate final tightening time cannot be known, and the end face of the cap nut is in contact with the end face of the flange portion of the pipe joint body. Nevertheless, the cap nut was sometimes tightened further. Due to over-tightening of the cap nut, the screw part may be deformed or damaged, the cap nut may retract from the specified position, the tightening force of the connecting pipe by the cap nut may decrease, and the sealing of the connection part may be perfect. Not
The liquid could leak.
【００１０】そこで、前記のような管継手において、袋
ナットの過剰締付けを避けるため、袋ナットの当接面ま
たは鍔部の当接面のいずれか一方に係合部を設け、いず
れか他方に上記係合部に係合自在な突部を設けた管継手
が提案されている（特開昭６４−６５３８４号公報）。Therefore, in the pipe joint as described above, in order to avoid excessive tightening of the cap nut, an engaging portion is provided on one of the contact surface of the cap nut and the contact surface of the collar portion, and the other is provided on the other. A pipe joint has been proposed in which the engaging portion is provided with a protrusion that can be engaged (Japanese Patent Laid-Open No. 64-65384).
【００１１】この管継手によれば、接続の際、袋ナット
と管継手本体とを相対的に回転させて両当接面を近接さ
せ、所望の止水構造が得られる状態になると、突部は係
合部に係合して締付けに要する力が大きく変動するため
に、作業者は工具を介して締付け抵抗の変化を容易に感
知することができる。According to this pipe joint, at the time of connection, when the cap nut and the pipe joint main body are relatively rotated to bring both abutting surfaces close to each other, and the desired water-stop structure is obtained, the protrusion is formed. Since the force of engaging with the engaging portion fluctuates greatly, the worker can easily detect the change in the tightening resistance through the tool.
【００１２】そして、この時点を適正な最終締付け位置
と判断して袋ナットの締付けを止めることによって、袋
ナット及び管継手本体のねじ部を破損あるいは変形させ
ることがなくなり、確実にシールできるとともに、締付
け力も均一に行える。[0012] Then, by judging this time as the proper final tightening position and stopping the tightening of the cap nut, the cap nut and the threaded portion of the pipe joint body are not damaged or deformed, and a reliable seal can be made. The tightening force can be uniform.
【００１３】上記管継手においては、管の接続後の暫く
は、袋ナットのテーパー部によって縮径された管継手本
体の円筒部先端は、元の径に復元しようとする力が残っ
ており、この復元力により袋ナットのテーパー部は外方
に押圧されるので、この押圧力により袋ナットの緩みが
阻止されるIn the above pipe joint, for a while after the pipe is connected, the tip of the cylindrical portion of the pipe joint body, which has been reduced in diameter by the tapered portion of the cap nut, has a force to restore the original diameter. The taper portion of the cap nut is pressed outward by this restoring force, so that the pressing force prevents the cap nut from loosening.
【００１４】しかし、長期にわたる使用によって、円筒
部先端が元の径に復元しようとする力は弱まり、袋ナッ
トのテーパー部に対する円筒部先端の押圧力がなくなる
ので、袋ナットが緩むことがある。However, due to long-term use, the force with which the tip of the cylindrical portion tries to return to the original diameter is weakened, and the pressing force of the tip of the cylindrical portion against the taper portion of the cap nut disappears, so the cap nut may loosen.
【００１５】ところで、上記管継手において、管継手本
体の鍔部と袋ナットとの当接面については、図８（ａ）
及び（ｂ）に示すとおり、鍔部１０Ａは外側面に平坦部
１０１Ａと角部１０２Ａとを有する側面六角形のナット
状に形成され、係合部１２Ａは、鍔部１０Ａの角部１０
２Ａの近傍に袋ナット２Ａ方向及び外側方向へ開口し、
突部２３Ａの内周面端縁２３１Ａと螺合方向側側縁２３
２Ａとで囲まれる部分が入り込むように形成されている
が、突部２３Ａの螺合方向と反対側の側端縁２３３Ａは
係合部１１Ａにおいて全く係止されるところがない。な
お、３Ａは接続筒体、５Ａは接続管である。By the way, in the above pipe joint, the contact surface between the flange portion of the pipe joint body and the cap nut is shown in FIG.
As shown in (b), the flange portion 10A is formed in a side surface hexagonal nut shape having a flat portion 101A and a corner portion 102A on the outer surface, and the engaging portion 12A is formed in the corner portion 10A of the flange portion 10A.
Open in the vicinity of 2A toward the cap nut 2A and outward,
The inner peripheral surface edge 231A of the protrusion 23A and the side edge 23 in the screwing direction
Although the portion surrounded by 2A is formed so as to enter, the side edge 233A on the side opposite to the screwing direction of the protrusion 23A has no place to be locked at the engaging portion 11A. In addition, 3A is a connection cylinder and 5A is a connection pipe.
【００１６】それ故、袋ナット２Ａを締付ける方向に回
転させる場合には、突部２３Ａの内周面端縁２３１Ａと
螺合方向側側縁２３２Ａとが、係合部１１Ａに係合して
大きな抵抗力が生ずるが、その逆の回転、すなわち、袋
ナット２Ａが緩む方向の回転に対しては全く抵抗力は生
じない構造となっている。Therefore, when the cap nut 2A is rotated in the tightening direction, the inner peripheral surface end edge 231A of the projection 23A and the side edge 232A on the screwing direction side engage with the engaging portion 11A to form a large size. Although the resistance force is generated, the resistance force is not generated at all in the opposite rotation, that is, the rotation in the direction in which the cap nut 2A is loosened.
【００１７】したがって、継手本体１Ａの円筒部の縮径
された先端部の復元力がなくなると、振動等によって袋
ナット１０Ａが締付け螺合方向とは逆の方向に回転して
緩むことがあり、止水機能が低下し、漏水する恐れがあ
った。Therefore, if the restoring force of the reduced diameter tip of the cylindrical portion of the joint body 1A disappears, the cap nut 10A may rotate and loosen in the direction opposite to the tightening and screwing direction due to vibration or the like. There was a risk that the water-stopping function would deteriorate, causing water leakage.
【００１８】この発明は、上記の点に鑑み、袋ナットの
過剰締付けが避けられてねじ部の変形や破損の恐れがな
く、且つ、長時間の使用によっても、袋ナットの緩みの
恐れがない管継手を提供することを目的とする。In view of the above points, the present invention avoids the excessive tightening of the cap nut and prevents the screw portion from being deformed or damaged, and does not cause the cap nut to loosen even after long-term use. The purpose is to provide a pipe joint.
【００１９】[0019]
【課題を解決するための手段】この発明の管継手は、接
続管の端部に外嵌され、その外周に雄ねじ部が形成され
た円筒部、及びこの円筒部の一端部から外周方向へ突設
された鍔部を備えた管継手本体と、この管継手本体の前
記雄ねじ部に螺合する雌ねじ部が端部内周に形成されて
いるとともに、基部内周にテーパー部が設けられた袋ナ
ットとを有し、前記袋ナットの雌ねじと前記管継手本体
の雄ねじ部との螺合により、袋ナットの先端に形成され
た当接面を管継手本体の鍔部に形成された当接面に近接
させるとともに、袋ナットの前記テーパー部の内方への
押圧によって前記管継手本体の円筒部に内嵌された接続
管外面が挟圧されるようになされた管継手において、袋
ナットの当接面または管継手本体の鍔部の当接面のいず
れか一方に凹部が形成され、他方に上記凹部に嵌合する
突部が形成されているものであり、そのことにより上記
目的が達成される。DISCLOSURE OF THE INVENTION The pipe joint of the present invention is a cylindrical portion externally fitted to an end portion of a connecting pipe and having a male screw portion formed on the outer periphery thereof, and an outer peripheral direction projecting from one end portion of the cylindrical portion. A cap nut having a flange portion provided therein and a female screw portion that is screwed into the male screw portion of the pipe joint body is formed on the inner circumference of the end portion, and a taper portion is provided on the inner circumference of the base portion. And a threaded engagement between the female thread of the cap nut and the male thread of the pipe joint body causes the contact surface formed at the tip of the cap nut to be the contact surface formed in the flange portion of the pipe joint body. In a pipe joint in which the outer surface of the connecting pipe fitted in the cylindrical portion of the pipe joint body is pinched by pressing the cap nut inwardly of the taper portion, the cap nut abuts There is a recess on either the surface or the contact surface of the flange of the pipe fitting body. Made is, which projections fit into the recesses in the other are formed, the object can be achieved.
【００２０】[0020]
【作用】接続の際、袋ナットと管継手本体とを相対的に
回転させて両当接面を近接させると、所望の止水構造が
得られる状態になる時点で、突部が凹部に嵌合し、締付
けに要する力が大きく増加し、その力は工具を介して容
易に感知され、この時点を作業者は適正な最終締付け位
置と判断できる。When the cap nut and the pipe joint body are relatively rotated at the time of connection so that both contact surfaces come close to each other, the projection fits into the recess when the desired water-stop structure is obtained. Therefore, the force required for tightening is greatly increased, and the force is easily sensed through the tool, and the operator can determine this time as the proper final tightening position.
【００２１】接続後、振動等により袋ナットが逆回転し
ようとしても、突部が凹部に嵌合してその回転が阻止さ
れ、袋ナットは緩まない。After the connection, even if the cap nut tries to rotate in the reverse direction due to vibration or the like, the protrusion fits into the recess to prevent the rotation, and the cap nut does not loosen.
【００２２】[0022]
【実施例】以下、この発明の実施例を図面を参照して説
明する。Embodiments of the present invention will be described below with reference to the drawings.
【００２３】図１〜図３は、この発明の管継手の実施例
を示しており、図１は正面図、図２は管を接続した状態
を示す一部破断正面図、図３は横断面図であって、
（ａ）は図１の III−III 線の断面図、（ｂ）はその要
部拡大断面図である。1 to 3 show an embodiment of a pipe joint of the present invention. FIG. 1 is a front view, FIG. 2 is a partially cutaway front view showing a state in which pipes are connected, and FIG. Figure,
1A is a sectional view taken along the line III-III in FIG. 1, and FIG. 1B is an enlarged sectional view of an essential part thereof.
【００２４】図１〜図３に示されるとおり、管継手は、
管継手本体１、袋ナット２から構成され、接続筒体３を
用いて給湯管や給水管などの一対の接続管４、５が接続
されるものである。As shown in FIGS. 1 to 3, the pipe joint is
It is composed of a pipe joint body 1 and a cap nut 2, and a pair of connection pipes 4 and 5 such as a hot water supply pipe and a water supply pipe are connected using a connection cylinder 3.
【００２５】管継手本体１は、外周に雄ねじ部１５が形
成された円筒部１４と、この円筒部１４の一端部から外
周方向へ一体に突設された鍔部１０とを備えている。The pipe joint body 1 is provided with a cylindrical portion 14 having a male screw portion 15 formed on the outer periphery thereof, and a flange portion 10 integrally projecting from one end of the cylindrical portion 14 in the outer peripheral direction.
【００２６】円筒部１４の先端にはその軸方向に長い複
数の切欠部１６が形成され、外部からの押圧力によりこ
の円筒部１４の先端が縮径できるようになっている。円
筒部１４の内径は、接続管５の外径にほぼ等しいかもし
くはやや大きく形成されている。また、円筒部１４の長
さは上記切欠部１６の先端が、後述する接続筒体３の案
内筒３１の外周に設けられた環状凹溝３３の位置にほぼ
対応するように設定されている。A plurality of notches 16 which are long in the axial direction are formed at the tip of the cylindrical portion 14 so that the tip of the cylindrical portion 14 can be reduced in diameter by an external pressing force. The inner diameter of the cylindrical portion 14 is substantially equal to or slightly larger than the outer diameter of the connecting pipe 5. The length of the cylindrical portion 14 is set so that the tip of the cutout portion 16 substantially corresponds to the position of an annular groove 33 provided on the outer periphery of the guide cylinder 31 of the connecting cylinder body 3 described later.
【００２７】鍔部１０は、外周面に平坦部１０１と角部
１０２とを有する例えば六角形状のナット状に形成さ
れ、スパナなどの締付け工具をその外面に係合して廻
し、あるいは固定できるようになっている。この鍔部１
０の開放する側面は接続筒体３のナット部３２に外嵌で
きる形状に形成されている。The collar portion 10 is formed, for example, in the shape of a hexagonal nut having a flat portion 101 and a corner portion 102 on the outer peripheral surface, so that a tightening tool such as a spanner can be engaged with the outer surface of the collar portion, or rotated or fixed. It has become. This collar part 1
The open side surface of 0 is formed in a shape that can be externally fitted to the nut portion 32 of the connection cylindrical body 3.
【００２８】そして、鍔部１０の当接面１１に凹部１２
がその周方向に適宜間隔をおいて、例えば６個設けられ
ている。この凹部１２は、当接面１１の縁部に位置し、
図３（ａ）及び（ｂ）に示されるとおり、平坦部１０１
における袋ナット２の角部１０２の螺合方向側の近傍
に、側面からみてほぼ三角形状に形成されている。Then, the contact surface 11 of the collar 10 is provided with a recess 12
Are provided at appropriate intervals in the circumferential direction, for example, six pieces are provided. The recess 12 is located at the edge of the contact surface 11,
As shown in FIGS. 3A and 3B, the flat portion 101
In the vicinity of the side of the corner portion 102 of the cap nut 2 in the screwing direction, a substantially triangular shape is formed when viewed from the side.
【００２９】袋ナット２は、一端内周に上記円筒部１４
の雄ねじ部１５に螺合するための雌ねじ部２０と、内周
面に他端方向に縮径して形成されたテーパー部２１と、
雌ねじ部２０の反対側端部の開口部とを備えている。こ
の開口部は、接続管５を案内する部分であり、接続管５
の外径よりやや大きい内径を有している。The cap nut 2 has a cylindrical portion 14 on the inner circumference at one end.
A female screw portion 20 for screwing into the male screw portion 15, and a taper portion 21 formed on the inner peripheral surface with a reduced diameter toward the other end,
And an opening at the opposite end of the female screw portion 20. This opening is a part for guiding the connecting pipe 5, and the connecting pipe 5
Has an inner diameter slightly larger than the outer diameter of.
【００３０】この袋ナット２は、その雌ねじ部２０が管
継手本体１の雄ねじ部１５に螺合されて管継手本体１に
装着されるが、接続管５を接続するにあたっては、袋ナ
ット２を緩めるか一旦外しておき、接続管５の端部を上
記開口部に挿入してから、袋ナット２を締付けるか螺合
する。袋ナット２の螺合が進むと、そのテーパー部２１
が管継手本体１の円筒部１４の切欠部１６を有する先端
部が内径方向に押圧されて縮径する。The cap nut 2 is mounted on the pipe joint body 1 by screwing the female screw portion 20 into the male screw portion 15 of the pipe joint body 1. When connecting the connecting pipe 5, the cap nut 2 is attached. Loosen or once removed, insert the end of the connection pipe 5 into the opening, and then tighten or screw the cap nut 2. As the screwing of the cap nut 2 progresses, the taper portion 21
Indicates that the tip end portion of the cylindrical portion 14 of the pipe joint body 1 having the cutout portion 16 is pressed in the inner diameter direction to reduce the diameter.
【００３１】袋ナット２の雌ねじ部２０を有する当接面
２２には、前記鍔部１０の凹部１２に嵌合するための突
部２３が形成されている。突部２３は、鍔部１０の当接
面１１を袋ナット２の当接面２２に当接させた際に、上
記凹部１２に対応する位置に配置され、すなわち６個対
応するよう突設されている。この突部２３は、側面から
みてほぼ台形形状に形成されているが、螺合側方向の側
面２３１及びその反対側側面２３２が上記凹部１２に入
り込むことにより凹部１２に嵌合するようになってい
る。On the contact surface 22 having the female thread portion 20 of the cap nut 2, there is formed a projection 23 for fitting into the recess 12 of the flange 10. When the contact surface 11 of the flange 10 is brought into contact with the contact surface 22 of the cap nut 2, the protrusions 23 are arranged at positions corresponding to the recesses 12, that is, six protrusions are provided. ing. The projection 23 is formed in a substantially trapezoidal shape when viewed from the side surface, but the side surface 231 in the screwing side direction and the opposite side surface 232 are fitted into the recess 12 by entering the recess 12. There is.
【００３２】従って、突部２３が凹部１２に嵌合される
と、締付ける方向に袋ナット２を廻すと、螺合側方向の
側面２３１が凹部１２の側面に当接し、逆に緩めるよう
に袋ナット２を廻す場合には、螺合方向と反対側の側面
２３２が凹部１２の側面に当接し、いずれの場合にも大
きな抵抗力が発生することになる。Therefore, when the projection 23 is fitted in the recess 12, when the cap nut 2 is turned in the tightening direction, the side surface 231 in the screwing side direction comes into contact with the side surface of the recess 12 and is loosened in the opposite direction. When the nut 2 is turned, the side surface 232 on the side opposite to the screwing direction comes into contact with the side surface of the recess 12 and a large resistance force is generated in any case.
【００３３】接続筒体３は、そのほぼ中央部に角形、例
えば六角形状のナット部３２が設けられ、その一端に管
４を接続するための接続部３０が延設され、他端に、接
続管５を接続するための円筒状の案内筒３１とが延設さ
れた構成とされている。接続部３０の外周面には雄ねじ
が形成され、接続管４が螺合により接続されるようにな
っている。The connecting cylindrical body 3 is provided with a nut 32 having a square shape, for example, a hexagonal shape, in a substantially central portion thereof, a connecting portion 30 for connecting the pipe 4 is provided at one end thereof, and a connecting portion 30 is provided at the other end thereof. A cylindrical guide tube 31 for connecting the pipe 5 is extended. A male screw is formed on the outer peripheral surface of the connecting portion 30, and the connecting pipe 4 is connected by screwing.
【００３４】この接続筒体３は、そのナット部３２が管
継手本体１の鍔部１０内に内嵌されることにより、管継
手本体１に装着される。そして、管継手本体１の円筒部
１４が接続筒体３の案内筒３１の回りに同芯状に配置さ
れ，案内筒３１の外周面と円筒部１４の内周面との間に
接続管５が挿入可能な間隙部７が形成されることにな
る。また、案内筒３１の先端側外周には環状凹溝３３が
設けられており、この凹溝３３にパッキング６が装着さ
れている。The connecting cylinder 3 is mounted on the pipe joint body 1 by fitting the nut portion 32 into the collar portion 10 of the pipe joint body 1. The cylindrical portion 14 of the pipe joint body 1 is arranged concentrically around the guide cylinder 31 of the connecting cylinder body 3, and the connecting pipe 5 is provided between the outer peripheral surface of the guide cylinder 31 and the inner peripheral surface of the cylindrical portion 14. Thus, the gap portion 7 into which is inserted can be formed. Further, an annular groove 33 is provided on the outer periphery of the guide tube 31 on the tip side, and the packing 6 is mounted in the groove 33.
【００３５】上記管継手本体１、袋ナット２及び接続筒
体３は、合成樹脂あるいはアルミニウム、銅など耐蝕性
材料で製せられ、これらは同一材料あるいは異種材料の
いずれでもよい。The pipe joint body 1, the cap nut 2 and the connecting cylinder 3 are made of a synthetic resin or a corrosion-resistant material such as aluminum or copper, which may be the same material or different materials.
【００３６】続いて、上記の管継手を使用して例えば給
湯管、給水管等の接続管４、５を接続する場合を図２を
参照して説明する。Next, a case of connecting the connecting pipes 4 and 5 such as a hot water supply pipe and a water supply pipe using the above pipe joint will be described with reference to FIG.
【００３７】まず、一方の接続管４の端部に接続筒体３
の接続部３０を螺合するとともに、雄ねじ１５から外し
た袋ナット２を他方の接続管５に外嵌めしておき、案内
筒３１と円筒部１４との間の間隙部７に、接続管５を挿
入する。続いて、管継手本体１を工具などで固定し、袋
ナット２を工具などで廻して袋ナット２の雌ねじ部２０
を円筒部１４の雄ねじ１５に螺合する。First, the connecting cylinder 3 is attached to the end of one connecting pipe 4.
Screwing the connection portion 30 of the connection nut, and fitting the cap nut 2 removed from the male screw 15 to the other connection pipe 5 in advance, and in the gap portion 7 between the guide cylinder 31 and the cylinder portion 14, the connection pipe 5 Insert. Subsequently, the pipe joint body 1 is fixed with a tool or the like, and the cap nut 2 is turned with a tool or the like to female thread portion 20 of the cap nut 2.
Is screwed onto the male screw 15 of the cylindrical portion 14.
【００３８】この螺合により袋ナット２は管継手本体１
の鍔部１０方向へ進み、袋ナット２の先端に形成された
当接面２２が管継手本体１の鍔部１０の側面に形成され
た当接面１１にほぼ当接する迄袋ナット２を締付ける
と、袋ナット２の当接面２２に形成された突部２３が、
管継手本体１の鍔部１０の当接面１１に形成された凹部
１２に嵌合する。By this screwing, the cap nut 2 becomes the pipe joint body 1
Of the cap nut 2 and tightens the cap nut 2 until the contact surface 22 formed at the tip of the cap nut 2 substantially contacts the contact surface 11 formed on the side surface of the flange 10 of the pipe joint body 1. And the protrusion 23 formed on the contact surface 22 of the cap nut 2,
The pipe joint body 1 is fitted into the recess 12 formed in the contact surface 11 of the flange 10.
【００３９】突部２３が凹部１２に嵌合すると、突部２
３の螺合側方向の側面２３ａが凹部１２の側面に当接す
ることにより、袋ナット２をそれ以上回転させるに要す
る強い締付け抵抗が工具に反力として作用することにな
り，急激に締付け力が増加する。この締付け力は工具を
介して手で感知されるので、この時点を訂正な締付け位
置として判断し、締付けを止める。When the projection 23 is fitted in the recess 12, the projection 2
When the side surface 23a of the screw 3 in the direction of the screwing side comes into contact with the side surface of the recess 12, a strong tightening resistance required to rotate the cap nut 2 further acts on the tool as a reaction force, and the tightening force is suddenly increased. To increase. Since this tightening force is detected by hand through the tool, this time is judged as the correct tightening position and the tightening is stopped.
【００４０】この時、袋ナット２のテーパー面２１で円
筒部１４の切欠部１６が形成されている先端部を内方へ
押圧することになる。この押圧により円筒部１４の先端
部は縮径して、管５の端部を内方へ押圧することにな
り、接続管５の内面が接続筒体３の案内筒３１の凹溝３
３に装着したパッキング６外面に圧接し、この部分で液
密的にシールされるとともに接続管５の離脱が防止され
る。こうして、接続管４、５の接続が終了する。At this time, the tapered surface 21 of the cap nut 2 presses the tip of the cylindrical portion 14 where the notch 16 is formed inward. This pressing reduces the diameter of the tip of the cylindrical portion 14 and presses the end of the pipe 5 inward, so that the inner surface of the connecting pipe 5 has the groove 3 of the guide pipe 31 of the connecting pipe 3.
It is pressed against the outer surface of the packing 6 mounted on the sheet 3, and is sealed in a liquid-tight manner at this portion, and the connecting pipe 5 is prevented from coming off. In this way, the connection of the connecting pipes 4 and 5 is completed.
【００４１】接続後、長時間経過して、円筒部１４の縮
径した先端部の復元力がなくなってくると、円筒部１４
の先端部が袋ナット２のテーパー部２１を外方に押圧す
る押圧力が弱まり、振動等により袋ナット２が緩むよう
に廻ろうとしても、突部２３の螺合方向と反対側の側面
２３ｂが凹部１２の側面に当接して大きな抵抗力が発生
し、その回転が阻止され、袋ナット２の緩みが防止され
る。After a long time has passed after connection, when the restoring force of the reduced diameter tip portion of the cylindrical portion 14 disappears, the cylindrical portion 14
Even if the tip portion of the projection 23 weakens the pressing force that pushes the taper portion 21 of the cap nut 2 outward and the cap nut 2 tries to loosen due to vibration or the like, the side surface 23b of the protrusion 23 opposite to the screwing direction is A large resistance force is generated by coming into contact with the side surface of the concave portion 12, its rotation is blocked, and the cap nut 2 is prevented from loosening.
【００４２】図４は、他の実施例のソケット型管継手で
あって、両端にこの発明の特徴とする接続機構を備えて
いる。管継手本体１ａは、中央部を鍔部１０ａとしてそ
の両端に円筒部１４ａが延設されたものであり、袋ナッ
ト２ａを２個備えている。これらの管継手本体１ａ、袋
ナット２ａ等の凹部１２ａ、突部２３ａやその他の構成
及び使用態様等は、図１〜３に示した管継手の場合と、
本質的に変わらないので説明を省略する。同様に、この
発明の構成はエルボ型やチーズ型等の管継手にも適用さ
れる。FIG. 4 shows a socket type pipe joint according to another embodiment, which is provided at both ends with a connecting mechanism which is a feature of the present invention. The pipe joint body 1a has a flange portion 10a at its center portion and cylindrical portions 14a extending at both ends thereof, and includes two cap nuts 2a. The pipe joint body 1a, the recess 12a such as the cap nut 2a, the protrusion 23a and other configurations and usage modes are the same as those of the pipe joint shown in FIGS.
The description is omitted because it is essentially the same. Similarly, the structure of the present invention is also applied to an elbow type or cheese type pipe joint.
【００４３】なお、突部及び凹部の形状は、図３に示す
形状でなくともよく、突部は、少なくとも凹部に入り込
む螺合側方向側面とその反対側側面とを有し、嵌合時、
この両側面が凹部の側壁に係止される形状であればよ
い。The shape of the protrusion and the recess may not be the shape shown in FIG. 3, and the protrusion has at least a side surface on the screw side toward the recess and a side surface opposite to the side surface.
Any shape may be used as long as both side surfaces are locked to the side walls of the recess.
【００４４】例えば、図５に示すとおり、袋ナット２ｂ
に設けられる突起２３ｂは直方体であって、鍔部１０ｂ
の凹部１２ｂはこの直方体状突起２３ｂが丁度嵌まる形
状のものとすることができる。また、図６に示すとお
り、袋ナット２ｃに設けられる突起２３ｃの螺合側を面
取りして傾斜面として螺合時に鍔部１０ｃの凹部１２ｃ
に嵌合し易くしたものでもよい。For example, as shown in FIG. 5, a cap nut 2b
The projection 23b provided on the base is a rectangular parallelepiped and has a collar 10b.
The recess 12b can be shaped so that the rectangular parallelepiped projection 23b is just fitted. Further, as shown in FIG. 6, the screwing side of the projection 23c provided on the cap nut 2c is chamfered to form an inclined surface, and the recessed portion 12c of the collar portion 10c at the time of screwing.
It may be one that is easily fitted to.
【００４５】図７は、図１〜３の接続筒３とは別の態様
の接続筒３ｄを用いたソケット型管継手を示している。FIG. 7 shows a socket type pipe joint using a connection tube 3d of a mode different from the connection tube 3 of FIGS.
【００４６】管継手本体１ｄは、図４における管継手本
体１ａと同様に、中央部を鍔部１０ｄとしてその両端に
円筒部１４ｄを延設したものである。袋ナット２ｄも２
個備え、管継手本体１ｄの円筒部１４ｄに螺合される。
この接続筒３ｄは、管継手本体１ｄに組み込まれること
なく、各接続管４ｄ、５ｄの端部に装着して用いられ
る。また、接続管４、６と管継手との止水構造部に用い
られるパッキング６ｄは、円筒部１４ｄの先端面と袋ナ
ット２ｄのテーパー部２１ｄとで挟持されるようにして
装着される。Similar to the pipe joint body 1a in FIG. 4, the pipe joint body 1d has a central portion with a collar portion 10d and cylindrical portions 14d extending at both ends thereof. Cap nut 2d is also 2
One piece is provided and screwed into the cylindrical portion 14d of the pipe joint body 1d.
The connecting tube 3d is used by being attached to the ends of the connecting pipes 4d and 5d without being incorporated in the pipe joint body 1d. The packing 6d used for the water blocking structure between the connecting pipes 4 and 6 and the pipe joint is mounted so as to be sandwiched between the tip end surface of the cylindrical portion 14d and the taper portion 21d of the cap nut 2d.
【００４７】従って、この管継手においては、袋ナット
２ｄの螺合により、テーパー部２１ｄがパッキング６ｄ
を押圧し、その結果パッキング６ｄが各接続管４ｄ、５
ｄの外面に押圧され、止水機能が発揮される。凹部１２
ｄ及び突部２３ｄの構成やその他の構成は、図１〜３の
管継手と特に変わらない。Therefore, in this pipe joint, the taper portion 21d is packed 6d by screwing the cap nut 2d.
, And as a result the packing 6d causes the connecting pipes 4d, 5
The water blocking function is exerted by being pressed against the outer surface of d. Recess 12
The configurations of d and the protrusion 23d and other configurations are not particularly different from those of the pipe joints of FIGS.
【００４８】[0048]
【発明の効果】上記したとおり、この発明の管継手は、
突部と凹部との嵌合により、袋ナットの締付け限度を感
知でき、このことにより袋ナットの締付けを止めること
によって、袋ナット及び管継手本体のねじ部を破損ある
いは変形させることがなくなり、確実にシールできると
ともに、締付け力も均一に行える。As described above, the pipe joint of the present invention is
By fitting the protrusion and the recess, the tightening limit of the cap nut can be sensed, and by stopping the tightening of the cap nut, the cap nut and the threaded portion of the pipe joint body will not be damaged or deformed. Not only can it be sealed, but also the tightening force can be made uniform.
【００４９】また、接続後、振動等によっても、突部と
凹部との嵌合によって袋ナットが逆回転することが阻止
されるので、袋ナットが緩むようなく、長期間にわたっ
て良好なシール性を維持できる。Further, after the connection, the cap nut is prevented from rotating in the reverse direction due to the fitting of the projection and the recess even after vibration, so that the cap nut does not become loose and a good sealing property is provided for a long period of time. Can be maintained.
【図１】この発明の管継手の実施例の正面図である。FIG. 1 is a front view of an embodiment of a pipe joint of the present invention.
【図２】図１の管継手の使用状態を示す部分切欠正面図
である。FIG. 2 is a partially cutaway front view showing a usage state of the pipe joint of FIG.
【図３】管継手の横断面図であり、（ａ）は図１のIII-
III 線の断面図、（ｂ）は（ａ）の要部拡大断面図であ
る。FIG. 3 is a cross-sectional view of the pipe joint, (a) of FIG.
FIG. 3B is a sectional view taken along the line III, and FIG.
【図４】他の実施例の正面図である。FIG. 4 is a front view of another embodiment.
【図５】この発明の管継手の突部と凹部の別の態様を示
す斜視図である。FIG. 5 is a perspective view showing another aspect of the projection and the recess of the pipe joint of the present invention.
【図６】この発明の管継手の突部と凹部の更に別の態様
を示す斜視図である。FIG. 6 is a perspective view showing still another aspect of the projection and the recess of the pipe joint of the present invention.
【図７】更に他の実施例の上半部切欠正面図である。FIG. 7 is a cutaway front view of the upper half of yet another embodiment.
【図８】（ａ）は従来の管継手の要部の横断面図、
（ｂ）は（ａ）の部分拡大断面図である。FIG. 8A is a cross-sectional view of a main part of a conventional pipe joint,
(B) is a partial expanded sectional view of (a).
１、１ａ、１ｄ 管継手本体、 １０、１０ａ、１０ｂ、１０ｃ、１０ｄ 鍔部 １２、１２ａ、１２ｂ、１２ｃ、１２ｄ 凹部 １４、１４ｄ 円筒部 ２、２ａ、２ｂ、２ｃ、２ｄ 袋ナット ２０ 雌ねじ部 ２１、２１ｄ テーパー部 ２３、２３ａ 突部 ３、３ｄ 接続筒体 ４、４ｄ、５、５ｄ 接続管 ６、６ｄ パッキング 1, 1a, 1d Pipe joint body, 10, 10a, 10b, 10c, 10d Collar portion 12, 12a, 12b, 12c, 12d Recessed portion 14, 14d Cylindrical portion 2, 2a, 2b, 2c, 2d Cap nut 20 Female screw portion 21 , 21d Tapered part 23, 23a Projection part 3, 3d Connection cylinder 4, 4d, 5, 5d Connection pipe 6, 6d Packing
Claims (1)
ねじ部が形成された円筒部、及びこの円筒部の一端部か
ら外周方向へ突設された鍔部を備えた管継手本体と、こ
の管継手本体の前記雄ねじ部に螺合する雌ねじ部が端部
内周に形成されているとともに、基部内周にテーパー部
が設けられた袋ナットと、を有し、 前記袋ナットの雌ねじと前記管継手本体の雄ねじ部との
螺合により、袋ナットの先端に形成された当接面を管継
手本体の鍔部に形成された当接面に近接させるととも
に、袋ナットの前記テーパー部の内方への押圧によって
前記管継手本体の円筒部に内嵌された接続管外面が挟圧
されるようになされた管継手において、 前記袋ナットの当接面または鍔部の当接面のいずれか一
方に凹部が形成され、他方に上記凹部に嵌合する突部が
形成されていることを特徴とする管継手。1. A pipe joint main body having a cylindrical portion externally fitted to an end portion of a connecting pipe and having a male screw portion formed on the outer periphery thereof, and a flange portion protruding from one end portion of the cylindrical portion toward the outer peripheral direction. And a cap nut having a female screw portion that is screwed into the male screw portion of the pipe joint body is formed on the inner circumference of the end portion, and a taper portion is provided on the inner circumference of the base portion. The contact surface formed at the tip of the cap nut is brought close to the contact surface formed at the flange portion of the pipe joint body by screwing between the male screw portion of the pipe joint body and the male screw portion of the pipe joint body, and the taper portion of the cap nut is formed. In the pipe joint in which the outer surface of the connecting pipe fitted in the cylindrical portion of the pipe joint body is pinched by the inward pressing, the contact surface of the cap nut or the contact surface of the flange portion A recess is formed in one of them, and a protrusion that fits in the recess is formed in the other. Pipe joint, characterized by being made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34807492A JP3188002B2 (en) | 1992-12-28 | 1992-12-28 | Pipe fittings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34807492A JP3188002B2 (en) | 1992-12-28 | 1992-12-28 | Pipe fittings |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06201081A true JPH06201081A (en) | 1994-07-19 |
| JP3188002B2 JP3188002B2 (en) | 2001-07-16 |
Family
ID=18394573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34807492A Expired - Fee Related JP3188002B2 (en) | 1992-12-28 | 1992-12-28 | Pipe fittings |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3188002B2 (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003074779A (en) * | 2001-04-20 | 2003-03-12 | San-Ei Faucet Mfg Co Ltd | Connection structure between resin pipe and joint |
| JP2003254485A (en) * | 2002-02-21 | 2003-09-10 | Dmt Co Ltd | Locking device of cap nut for coupling |
| JP2004183761A (en) * | 2002-12-03 | 2004-07-02 | Ck Kinzoku Kk | Hot water/cold water supplying pipe header and joint |
| JP2008020060A (en) * | 2006-03-14 | 2008-01-31 | Sumika Agrotech Co Ltd | Coupling for flexible hose |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |