JPH0221478B2 - - Google Patents
Info
- Publication number
- JPH0221478B2 JPH0221478B2 JP57132123A JP13212382A JPH0221478B2 JP H0221478 B2 JPH0221478 B2 JP H0221478B2 JP 57132123 A JP57132123 A JP 57132123A JP 13212382 A JP13212382 A JP 13212382A JP H0221478 B2 JPH0221478 B2 JP H0221478B2
- Authority
- JP
- Japan
- Prior art keywords
- bead
- pipe
- sleeve nut
- nut
- sleeve
- 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.)
- Expired - Lifetime
Links
Landscapes
- Joints With Pressure Members (AREA)
Description
【発明の詳細な説明】
本発明は、接続端付近で半径方向に膨出するビ
ードを有する管と、接続端の逆側で管に遊嵌した
スリーブナツトと、導口と該ナツトの接続口とを
有する接手部分を有し、スリーブナツトの端面と
接続口の底面間で管のビードを挾み、管の接続端
側のビードに隣接した絞り部に嵌め込んだゴム弾
性Ｏリングが、ビード方向に拡大するテーパー孔
として形成された導口の内周面に圧着されている
管継手に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention comprises a tube having a bead that bulges out in the radial direction near the connecting end, a sleeve nut loosely fitted into the tube on the opposite side of the connecting end, and an inlet and a connecting port of the nut. The bead of the pipe is sandwiched between the end face of the sleeve nut and the bottom face of the connection port, and a rubber elastic O-ring fitted into the constricted part adjacent to the bead on the connection end side of the pipe is inserted into the bead. The present invention relates to a pipe joint that is crimped onto the inner peripheral surface of an inlet that is formed as a tapered hole that expands in the direction of the pipe.
本出願人による特開昭57−195985号公報に記載
のこの種の管継手は、同明細書に記載された様
に、Ｏリングがテーパー孔の拡大方向から縮少方
向へ押込められるので、Ｏリングがビードと絞り
部とテーパー孔内周面間に挾持され、テーパー孔
のテーパー角度を適当に選択することによりＯリ
ングの圧縮量も自在とすることができるので、流
体の圧力等に応じてＯリングの密封性を高くでき
るという利点があつた。しかしながら、この従来
技術においては、スリーブナツトを締込んだ際、
管の塑性変形によつて生じたビードが、締込み量
を過度にするとき、ビード部分が更に過度の塑性
変形を起すことになるので、この部分に亀裂が生
じたり、ねじ切れたりするという欠点がある。 In this type of pipe joint described in Japanese Patent Application Laid-Open No. 1985-195985 by the present applicant, as described in the same specification, the O-ring is pushed in from the direction of expansion of the tapered hole to the direction of contraction. The O-ring is held between the bead, the constriction part, and the inner circumferential surface of the tapered hole, and by appropriately selecting the taper angle of the tapered hole, the amount of compression of the O-ring can be adjusted freely, depending on the pressure of the fluid, etc. This has the advantage that the sealing performance of the O-ring can be improved. However, in this conventional technology, when the sleeve nut is tightened,
When the bead formed due to plastic deformation of the pipe is tightened excessively, the bead part will further undergo excessive plastic deformation, resulting in cracks or thread breakage in this part. There is.
本発明の課題は上述従来技術の欠点を除去する
ことを課題とする。スリーブナツトにスリーブナ
ツトの締込み量を制限するストツパーを設けるこ
とにより、スリーブナツトの過度の締込みを防止
でき、従つてスリーブナツトの締込みトルクを調
節することなく、ビードの破断、破損を確実に防
止できる。次に図示の実施例により本発明を詳細
に説明する。 An object of the present invention is to eliminate the drawbacks of the prior art described above. By providing the sleeve nut with a stopper that limits the amount of tightening of the sleeve nut, it is possible to prevent excessive tightening of the sleeve nut, thereby ensuring that the bead does not break or break without adjusting the tightening torque of the sleeve nut. can be prevented. Next, the present invention will be explained in detail with reference to illustrated embodiments.
第１図は、本発明による管継手の締込む直前の
状態を示している。管継手は、接続端１付近に設
けた半径方向に等様に膨出するビード２を有する
管３と、ビード２の接続端１とは逆側で管３に遊
嵌したスリーブナツト４と、該スリーブナツト４
がねじ込まれる接続口５を有する接手部分１０か
らなる。接続口５はビード２をスリーブナツト４
の端面４′と共に挾持する底面５′を有し、該底面
５′は接続口５方向に拡大するテーパー孔として
形成され、そのテーパー角度は約80゜程度の大き
な角度としている。接続端１側でビード２に隣接
して絞り６が形成され、該絞り６の外周にはゴム
弾性Ｏリング７が位置決め嵌合されている。 FIG. 1 shows the state of the pipe joint according to the present invention just before it is tightened. The pipe joint includes a pipe 3 having a bead 2 provided near the connecting end 1 and uniformly bulging in the radial direction, a sleeve nut 4 loosely fitted into the pipe 3 on the opposite side of the bead 2 from the connecting end 1, The sleeve nut 4
It consists of a joint part 10 having a connection port 5 into which a screw is screwed. Connection port 5 connects bead 2 to sleeve nut 4
The bottom surface 5' is formed as a tapered hole that expands in the direction of the connection port 5, and the taper angle is a large angle of about 80 degrees. A diaphragm 6 is formed adjacent to the bead 2 on the connection end 1 side, and a rubber elastic O-ring 7 is positioned and fitted around the periphery of the diaphragm 6.
接手部分１０の接続口５と同心に導口８が形成
されていて、該導口８は接続口５の底面５′方向
に拡大するテーパー孔９を備え、そのテーパー角
度は40゜程度であるが、流体の圧力により適宜選
択できる。スリーブナツト４のナツト頭部１１の
端面がストツパー１１′として形成され、該スト
ツパー１１′は接手部分１０の端面１０′と協働
し、スリーブナツト４の締込み量を制限する。 An inlet 8 is formed concentrically with the connection port 5 of the joint portion 10, and the inlet 8 is provided with a tapered hole 9 that expands in the direction of the bottom surface 5' of the connection port 5, and the taper angle is about 40 degrees. can be appropriately selected depending on the pressure of the fluid. The end face of the nut head 11 of the sleeve nut 4 is formed as a stopper 11', which cooperates with the end face 10' of the joint part 10 and limits the amount by which the sleeve nut 4 can be tightened.
第２図に示しているように、本発明による管継
手のスリーブナツト４を締込むと、スリーブナツ
ト４は、第１図に示した締込み量だけ締込ま
れ、その時ビード部分は塑性変形を起す。締込み
量はビード部分２の軸方向の間隙Ｃより大き
く、この間隙Ｃと管の肉厚ｔを加えた量よりも小
さくする。この様にすると、ビード２の破断を防
ぐことができる程度にビード２を塑性変形でき、
この塑性変形により、接続口５の底面５′のテー
パー孔に適合してビード２の当接面を塑性変形で
きる。従つて、この管継手を保守点検、補修等で
着脱して使用する際、この当接面をテーパー孔底
面とで管と接手部分との調心を容易にする。な
お、Ｏリング７は導口８のテーパー孔９の内周面
と、管の絞り６との間に圧縮されて、この間を密
封する。このとき流体の圧力等に応じてテーパー
孔９のテーパー角度とＯリングの弾性を適正に選
択することは言う迄もない。 As shown in FIG. 2, when the sleeve nut 4 of the pipe joint according to the present invention is tightened, the sleeve nut 4 is tightened by the tightening amount shown in FIG. 1, and at that time, the bead portion undergoes plastic deformation. cause. The tightening amount is larger than the axial gap C of the bead portion 2 and smaller than the sum of this gap C and the wall thickness t of the pipe. In this way, the bead 2 can be plastically deformed to the extent that breakage of the bead 2 can be prevented,
This plastic deformation allows the contact surface of the bead 2 to be plastically deformed to fit the tapered hole in the bottom surface 5' of the connection port 5. Therefore, when this pipe joint is attached and detached for maintenance, inspection, repair, etc., the abutting surface and the bottom surface of the tapered hole facilitate alignment of the pipe and the joint portion. Note that the O-ring 7 is compressed between the inner circumferential surface of the tapered hole 9 of the inlet 8 and the restriction 6 of the pipe, thereby sealing the space therebetween. At this time, it goes without saying that the taper angle of the tapered hole 9 and the elasticity of the O-ring should be appropriately selected depending on the pressure of the fluid and the like.
第１図は本発明による管接手のスリーブナツト
を締込む直前の縦断面図であり、第２図は第１図
の管継手のスリーブナツトを締込んだ後の縦断面
図である。
１……管３の接続端、２……ビード、３……
管、４……スリーブナツト、４′……スリーブナ
ツト端面、５……接続口、５′……接続口底面、
６……管３の絞り、７……Ｏリング、８……導
口、９……導口８のテーパー孔、１０……接手部
分、１１……スリーブナツト頭部、１１′……ス
トツパー。
FIG. 1 is a longitudinal sectional view of the pipe joint according to the present invention immediately before the sleeve nut is tightened, and FIG. 2 is a longitudinal sectional view of the pipe joint of FIG. 1 after the sleeve nut is tightened. 1... Connection end of pipe 3, 2... Bead, 3...
Pipe, 4...Sleeve nut, 4'...Sleeve nut end face, 5...Connection port, 5'...Bottom surface of connection port,
6... Throttle of pipe 3, 7... O-ring, 8... Inlet, 9... Tapered hole of inlet 8, 10... Joint portion, 11... Sleeve nut head, 11'... Stopper.
Claims (1)
する管と、接続端の逆側で管に遊嵌したスリーブ
ナツトと、導口および該ナツトの接続口を有する
接手部分とを有し、スリーブナツトの端面と接続
口の底面との間で管のビードを挾み、管の接続端
側のビードに隣接した絞り部に嵌め込んだゴム弾
性Ｏリングが、ビード方向に拡大するテーパー孔
として形成された導口の内周面に圧着されている
管継手において、スリーブナツトの締込み量を制
限するストツパーをスリーブナツト頭部と接手部
分との間に設けており、該スリーブナツトの締込
み量が、管のビードの軸方向の間〓Ｃよりも大で
あり、該間〓Ｃと管の肉厚ｔとの和よりも小であ
り、前記接続口の底面を僅かにテーパー状に傾斜
させていることを特徴とする管継手。1 A pipe having a bead that bulges in the radial direction near the connecting end, a sleeve nut loosely fitted into the pipe on the opposite side of the connecting end, and a joint portion having an inlet and a connecting port for the nut, and the sleeve The bead of the pipe is sandwiched between the end face of the nut and the bottom face of the connection port, and a rubber elastic O-ring fitted into the constricted part adjacent to the bead on the connection end side of the pipe is formed as a tapered hole that expands in the direction of the bead. In pipe fittings that are crimped onto the inner circumferential surface of the inlet port, a stopper is provided between the sleeve nut head and the joint portion to limit the amount of tightening of the sleeve nut. is larger than the distance C in the axial direction of the bead of the tube and smaller than the sum of the distance C and the wall thickness t of the tube, and the bottom surface of the connection port is slightly tapered. A pipe fitting characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13212382A JPS5923181A (en) | 1982-07-30 | 1982-07-30 | Pipe joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13212382A JPS5923181A (en) | 1982-07-30 | 1982-07-30 | Pipe joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5923181A JPS5923181A (en) | 1984-02-06 |
| JPH0221478B2 true JPH0221478B2 (en) | 1990-05-15 |
Family
ID=15073942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13212382A Granted JPS5923181A (en) | 1982-07-30 | 1982-07-30 | Pipe joint |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5923181A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0842983A (en) * | 1994-07-28 | 1996-02-16 | Diamond Electric Mfg Co Ltd | Heat pipe |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56162385U (en) * | 1980-05-01 | 1981-12-02 | ||
| JPS5779290U (en) * | 1980-10-31 | 1982-05-15 |
-
1982
- 1982-07-30 JP JP13212382A patent/JPS5923181A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0842983A (en) * | 1994-07-28 | 1996-02-16 | Diamond Electric Mfg Co Ltd | Heat pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5923181A (en) | 1984-02-06 |
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