JP4599158B2 - Pipe fitting - Google Patents

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JP4599158B2
JP4599158B2 JP2004381642A JP2004381642A JP4599158B2 JP 4599158 B2 JP4599158 B2 JP 4599158B2 JP 2004381642 A JP2004381642 A JP 2004381642A JP 2004381642 A JP2004381642 A JP 2004381642A JP 4599158 B2 JP4599158 B2 JP 4599158B2
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sleeve
wall
nut
conical portion
pipe
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JP2006153254A (en
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信二 深谷
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Ihara Science Corp
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Description

本発明は、管継手に関し、詳しくは、スリーブによって押圧されるソフトシールを有するソフトシール管継手に関するものである。  The present invention relates to a pipe joint, and more particularly, to a soft seal pipe joint having a soft seal pressed by a sleeve.

従来の１スリーブのソフトシール管継手としては、図６に示すようなものがある（例えば、特許文献１参照。）。
本管継手は、継手本体１１と、スリーブ１２と、このスリーブ１２の前方に接続されるシール１３と、ナット１４とからなる。
前記継手本体１１の一端には、管１５を受け入れるための穴と、この穴に形成された円錐部１１ａと、この円錐部１１ａに隣接する半径方向の端面１１ｂとナット１４がねじ込まれるネジ部１１ｃが形成されている。前記ナット１４にも同様の穴が形成され、その内壁には円錐部１４ａが形成されている。
前記スリーブ１２の一端には、前記ナット１４の円錐部１４ａと係合する円錐部１２ａが形成され、他端には、継手本体１１の端面１１ｂと接触してシール１３の締め付けを制限する面１２ｂが形成されている。また、スリーブ１２のナット側内壁には、ナット１４を継手本体１１にねじ込んだ時に管１５と係合する切込み刃１２ｃが形成されている。前記シール１３は、スリーブ１２より軟い材料でできていて、継手本体１１の円錐部１１ａと管１５に接触するようにされている。
また、２スリーブのソフトシール管継手としては、図７に示すようなものがある（例えば、特許文献２参照。）。
本管継手は、継手本体２１と、保持スリーブ２２と、密封スリーブ２３と、密封スリーブ２３の前方に接続されるエラストマーシール２４と、ナット２５とからなる。
前記保持スリーブ２２は、管２６を保持する切込み刃２２ａと、ナット２５に係合する係合面２２ｂと、半径方向のストップ面２２ｃとを有し、
前記密封スリーブ２３は、継手本体２１の環状端面２１ａに当接する第１ストップ面２３ａと、前記保持スリーブ２２の半径方向のストップ面２２ｃに当接し、保持スリーブ２２を停止させる半径方向の第２ストップ面２３ｂと、保持スリーブ２２を摺動可能に収容する円錐形の滑り面２３ｃを有する。
米国特許第４３０９０５０号明細書 特許第２７９９７９７号公報 As a conventional one-sleeve soft seal fitting, there is one as shown in FIG. 6 (see, for example, Patent Document 1).
The main pipe joint includes a joint body 11, a sleeve 12, a seal 13 connected to the front of the sleeve 12, and a nut 14.
At one end of the joint body 11, a hole for receiving the tube 15, a conical portion 11a formed in the hole, a radial end surface 11b adjacent to the conical portion 11a, and a screw portion 11c into which the nut 14 is screwed. Is formed. A similar hole is formed in the nut 14, and a conical portion 14a is formed on the inner wall thereof.
One end of the sleeve 12 is formed with a conical portion 12 a that engages with the conical portion 14 a of the nut 14, and the other end is a surface 12 b that comes into contact with the end surface 11 b of the joint body 11 and restricts tightening of the seal 13. Is formed. Further, a cutting blade 12 c that engages with the pipe 15 when the nut 14 is screwed into the joint body 11 is formed on the nut-side inner wall of the sleeve 12. The seal 13 is made of a material softer than the sleeve 12 and is in contact with the conical portion 11 a of the joint body 11 and the pipe 15.
Further, as a two-sleeve soft seal fitting, there is one as shown in FIG. 7 (see, for example, Patent Document 2).
The main pipe joint includes a joint body 21, a holding sleeve 22, a sealing sleeve 23, an elastomer seal 24 connected to the front of the sealing sleeve 23, and a nut 25.
The holding sleeve 22 has a cutting blade 22a for holding the tube 26, an engagement surface 22b for engaging with the nut 25, and a radial stop surface 22c.
The sealing sleeve 23 is in contact with a first stop surface 23 a that contacts the annular end surface 21 a of the joint body 21 and a radial stop surface 22 c of the holding sleeve 22, and a second radial stop that stops the holding sleeve 22. The surface 23b and the conical sliding surface 23c which slidably accommodates the holding sleeve 22 are provided.
U.S. Pat. No. 4,309,050 Japanese Patent No. 27999797

図６に示した管継手では、ナットを回転するとスリーブと管が共回りすることがある。また、管の外径寸法がばらつくと、スリーブのくい込み量が変化する。さらに、管に加わる横方向の力に弱いといった問題があった。
図７に示した管継手では、保持スリーブを管にくい込ませることに大きな推力が必要となるので、締め付け開始時から締め付けトルクが高くなり、締め付け完了時の把握がわかり難いという問題があった。
本発明は、ナット回転時のスリーブと管の共回りを無くし、管外径寸法のばらつきによるスリーブのくい込み量の変化を無くし、管に加わる横方向の力に強く、かつ、ナット締め付け完了時の把握を容易にした管継手を提供することを目的とする。In the pipe joint shown in FIG. 6, when the nut is rotated, the sleeve and the pipe may rotate together. Further, when the outer diameter of the tube varies, the amount of biting of the sleeve changes. In addition, there is a problem that the lateral force applied to the tube is weak.
The pipe joint shown in FIG. 7 has a problem that a large thrust is required to insert the holding sleeve into the pipe so that the tightening torque becomes high from the start of tightening and it is difficult to grasp when the tightening is completed.
The present invention eliminates co-rotation of the sleeve and the tube during rotation of the nut, eliminates a change in the amount of biting of the sleeve due to variations in the outer diameter of the tube, is strong against the lateral force applied to the tube, and completes when the nut is tightened. It aims at providing the pipe joint which made grasping easy.

本発明の管継手は、継手本体（１）と、スリーブ（２）と、継手本体（１）とスリーブ（２）間に設けられるシール（３）と、継手本体（１）にねじ込まれるナット（４）と、スリーブ（２）とナット（４）間に設けられるスラストワッシャー（５）とからなり、
前記スリーブ（２）の本体側内壁には、管（６）の外壁を摺動する突起部（２ａ）が形成され、ナット側内壁には、管（６）に係合する切込み刃（２ｂ）が形成され、ナット側外壁には、円錐部（２ｅ）が形成されており、さらに前記スリーブ（２）の中央近傍の外壁には、前記スラストワッシャー（５）の内壁を摺動可能に保持する突起部（２ｆ）が形成されており、
前記スラストワッシャー（５）のナット側内壁には、前記スリーブ（２）の円錐部（２ｅ）と係合する円錐部（５ａ）が形成され、本体側端部には、継手本体（１）の端面（１ｃ）と係合してスリーブ（２）のくい込みを制限する面（５ｂ）が形成されており、
前記ナット（４）には、スラストワッシャー外壁の円錐部（５ｃ）に係合する円錐部（４ａ）が形成されており、前記スラストワッシャー内壁の円錐部（５ａ）の角度は、前記ナット（４）の円錐部（４ａ）の角度より小さいことを特徴とする。
その場合、前記スリーブの継手本体側の外壁が前記継手本体の円錐部に係合し、スリーブの突起部が管に係合して、前記シールを継手本体の円錐部内に密封保持することが好ましい。
またその場合、前記切込み刃は、継手本体側に刃先が向けられた多刃であることが好ましい。 The pipe joint of the present invention includes a joint body (1), a sleeve (2), a seal (3) provided between the joint body (1) and the sleeve (2), and a nut ( 4) and a thrust washer (5) provided between the sleeve (2) and the nut (4),
A protrusion (2a) that slides on the outer wall of the pipe (6) is formed on the inner wall of the sleeve (2), and a cutting blade (2b) that engages the pipe (6) is formed on the inner wall of the nut (2). A conical portion (2e) is formed on the nut-side outer wall, and the inner wall of the thrust washer (5) is slidably held on the outer wall near the center of the sleeve (2). The protrusion (2f) is formed,
A conical portion (5a) that engages with the conical portion (2e) of the sleeve (2) is formed on the inner wall of the thrust washer (5) on the nut side. A surface (5b) that engages with the end surface (1c) and restricts the biting of the sleeve (2) is formed,
The nut (4) is formed with a conical portion (4a) that engages with the conical portion (5c) of the outer wall of the thrust washer, and the angle of the conical portion (5a) of the inner wall of the thrust washer depends on the nut (4 ) Is smaller than the angle of the conical portion (4a).
In that case, it is preferable that the outer wall of the sleeve on the side of the joint main body engages with the conical portion of the joint main body, and the protrusion of the sleeve engages with the pipe, so that the seal is hermetically held within the conical portion of the joint main body. .
Moreover, in that case, it is preferable that the cutting blade is a multi-blade having a cutting edge directed toward the joint body.

本発明は、以上説明したように構成されているため、次のような効果を得ることができる。
（１）本発明では、スラストワッシャーを設け、ナット内壁の円錐部の角度と、スラストワッシャー内壁の円錐部の角度を変えているので、ナット回転時にスリーブと管の共回りがなくなる。また、ナット締め付け時のトルクが低くなり、締め付け完了時にトルクが急上昇するので、締め付け完了時の把握が容易となる。
（２）本発明では、スラストワッシャーを設けたので、管の外径寸法がばらついても、スラストワッシャーの膨張、収縮によりスリーブのくい込み量を一定にすることができる。Since the present invention is configured as described above, the following effects can be obtained.
(1) In the present invention, a thrust washer is provided, and the angle of the conical portion of the inner wall of the nut and the angle of the conical portion of the inner wall of the thrust washer are changed. Further, the torque at the time of tightening the nut becomes low, and the torque increases rapidly when the tightening is completed, so that it is easy to grasp when the tightening is completed.
(2) In the present invention, since the thrust washer is provided, the amount of biting of the sleeve can be made constant by expansion and contraction of the thrust washer even if the outer diameter of the pipe varies.

本発明による管継手の一実施例について図面を参照して説明する。
図１は、本発明の管継手の要部断面図で、締め付け前の状態を示す図であり、図２は、本発明の管継手の分解説明図である。
図１及び図２に示すように、本発明の管継手は、継手本体１と、スリーブ２と、継手本体１とスリーブ２間に設けられるシール３と、ナット４と、スリーブ２とナット４間に設けられるスラストワッシャー５とからなる。
前記継手本体１の図中右側（後側）には、管６を収容する穴１ａと、この穴１ａに隣接する円錐部１ｂと、この円錐部１ｂに隣接する半径方向の端面１ｃと、ナット４がねじ込まれるネジ部１ｄが形成されている。
前記スリーブ２の図中左側（前側）の内壁には、管の外壁を摺動する突起部２ａが形成され、右側（後側）の内壁には、管６に係合する切込み刃２ｂが形成されている。前記切込み刃２ｂは、継手本体１側に刃先が向けられた多刃であることが好ましい。なお、スリーブ２の中央近傍の内壁にも、管６の外壁を摺動する突起部２ｃが形成されている。このように、スリーブ２の両側は柔軟な構成とされ、更に、スリーブ自体も、柔軟な材料が採用されている。スリーブ２の前側端部は、シールを押圧する端面２ｄとされ、その外壁は、継手本体１の円錐部１ｂに嵌め込み可能な寸法とされている。また、後側外壁には、後述するスラストワッシャー５に係合する円錐部２ｅが形成されている。なお、スリーブ２の円筒状の外壁にも、スラストワッシャー５の内壁を摺動する円筒状の突起部２ｆが形成されている。
前記シール２は、継手本体１の円錐部１ｂとスリーブ２の端面２ｄと管６に接触するように構成されている。シール２には、エラストマーシールが好ましい。
前記スラストワッシャー５の図中左側（前側）の内壁には、前記スリーブ２の中央近傍の突起部２ｆと係合する円筒部が形成され、スラストワッシャー５の右側（後側）の内壁には、前記スリーブ２の円錐部２ｅと係合する円錐部５ａが形成されている。この円錐部５ａの拡大端に隣接して、スリーブ２の後側外壁を摺動する円筒部が形成されている。スラストワッシャー５の前側端部には、継手本体１の前記端面１ｃと係合してスリーブ２のくい込みを制限する面５ｂが形成され、スラストワッシャー５の後側外壁には、前記ナット４の円錐部と係合する円錐部５ｃが形成されている。また、スラストワッシャー５は、滑り易い材質で製作し、かつ潤滑処理をして、ナットを締め付けるときの回転方向の力を管６まで伝えないようしている。
前記ナット４には、管６が挿入される穴に隣接して、前記スラストワッシャー外壁の円錐部５ｃに係合する円錐部４ａが形成されている。なお、スラストワッシャー内壁の円錐部の５ａ角度を、ナット４の円錐部４ａの角度より小さくして、スラストワッシャー５からスリーブ２に加わる力の半径方向と軸方向の分力のバランスを取っている。An embodiment of a pipe joint according to the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view of a main part of the pipe joint of the present invention, showing a state before tightening, and FIG. 2 is an exploded explanatory view of the pipe joint of the present invention.
As shown in FIGS. 1 and 2, the pipe joint of the present invention includes a joint body 1, a sleeve 2, a seal 3 provided between the joint body 1 and the sleeve 2, a nut 4, and a sleeve 2 and a nut 4. The thrust washer 5 is provided.
On the right side (rear side) of the joint body 1 in the figure, a hole 1a for accommodating the tube 6, a conical part 1b adjacent to the hole 1a, a radial end face 1c adjacent to the conical part 1b, and a nut A screw portion 1d into which 4 is screwed is formed.
A protrusion 2a that slides on the outer wall of the pipe is formed on the inner wall on the left side (front side) of the sleeve 2 in the figure, and a cutting blade 2b that engages with the pipe 6 is formed on the inner wall on the right side (rear side). Has been. The cutting blade 2b is preferably a multi-blade with the cutting edge directed to the joint body 1 side. A protrusion 2 c that slides on the outer wall of the tube 6 is also formed on the inner wall near the center of the sleeve 2. Thus, both sides of the sleeve 2 are configured to be flexible, and the sleeve itself is also made of a flexible material. The front end portion of the sleeve 2 is an end surface 2d that presses the seal, and the outer wall thereof is dimensioned to be fitted into the conical portion 1b of the joint body 1. Moreover, the cone part 2e engaged with the thrust washer 5 mentioned later is formed in the rear side outer wall. A cylindrical projection 2 f that slides on the inner wall of the thrust washer 5 is also formed on the cylindrical outer wall of the sleeve 2.
The seal 2 is configured to contact the conical portion 1 b of the joint body 1, the end surface 2 d of the sleeve 2, and the pipe 6. The seal 2 is preferably an elastomer seal.
On the inner wall on the left side (front side) of the thrust washer 5 in the figure, a cylindrical portion that engages with the protrusion 2f near the center of the sleeve 2 is formed, and on the inner wall on the right side (rear side) of the thrust washer 5, A conical portion 5 a that engages with the conical portion 2 e of the sleeve 2 is formed. A cylindrical portion that slides on the rear outer wall of the sleeve 2 is formed adjacent to the enlarged end of the conical portion 5a. A front end portion of the thrust washer 5 is formed with a surface 5b that engages with the end surface 1c of the joint body 1 to limit the biting of the sleeve 2, and a rear outer wall of the thrust washer 5 has a cone of the nut 4. A conical portion 5c that engages with the portion is formed. The thrust washer 5 is made of a slippery material and is lubricated so as not to transmit the force in the rotational direction when the nut is tightened to the pipe 6.
The nut 4 is formed with a conical portion 4a that engages with the conical portion 5c of the outer wall of the thrust washer adjacent to the hole into which the tube 6 is inserted. The angle 5a of the conical portion of the inner wall of the thrust washer is made smaller than the angle of the conical portion 4a of the nut 4 to balance the radial force and the axial component force applied from the thrust washer 5 to the sleeve 2. .

次に、本管継手より管の接続方法について説明する。
図２に示すように管６にナット４、スラストワッシャー５、スリーブ２、シール３を順に通し、管端を継手本体１の穴底に当たるまで差し込む。次に、ナット４を手で回転して継手本体方向に移動し、上記各部品を図２及び図３に示す締め付け前の状態に組み立てる。
次に、ナット４を締め付けて、ナット４の円錐部４ａでスラストワッシャー外壁の円錐部５ｃを押すと、スラストワッシャー内壁の円錐部５ａがスリーブ２を押す。これによりスリーブ２は継手本体側に動くと共に、その前側端部が継手本体１の円錐部１ｂに当たりスリーブ２が絞られて、スリーブ２の前側の突起部２ａで管６を保持する。その際、シール３を継手本体１の円錐部１ｂと管６の間にできた隙間に押し込む。これにより、流体の漏れを防ぐことができる。同時に、スリーブ外壁の円錐部２ｅも絞られて、内壁に形成されている切込み刃２ｂが管６を保持すると共に、管６にくい込む。これにより管６を保持することができる。更に、ナット４を締め付けると継手本体１１の端面１ｃとスラストワッシャー５の前端の面５ｂが当たり、締め付けトルクは急激に上昇する。これにより締め付けは終了して図４に示した状態となる。
上述したように、スラストワッシャー内壁の円錐部５ａの角度（１０°〜２０°）を、ナット４の円錐部４ａの角度（４０°〜９０°）より小さくして、スラストワッシャー５からスリーブ２に加わる力の半径方向と軸方向の分力のバランスを取っている。これはスリーブ２が管６を保持している部分２ｂの半径方向の反力をスラストワッシャー５で受ける為、スラストワッシャー５とナット４のすべり部分４ａ，５ｃを圧着しようとする力は図６に示した従来例の管継手と比べ小さくなり、ナット回転時にスリーブ２と管６の共回りがなくなる。また、図５に示すように、ナット締め付け時のトルクが、図７に示した従来例の管継手より低くなり、締め付け完了時にトルクが急上昇するので、締め付け完了時の把握が容易となる。
また、本継手では、スラストワッシャー５は適度に広がってスリーブ２を締め付けるので、管６の外径の寸法許容差が大きくても、くい込み量を一定に保つことができる。さらに、スリーブ２が、継手本体側とナット側の２点で管６をホールドしているため、管６に加わる横方向の力に対して強い。Next, a method for connecting pipes from the main pipe joint will be described.
As shown in FIG. 2, the nut 4, the thrust washer 5, the sleeve 2, and the seal 3 are passed through the tube 6 in order, and the tube end is inserted until it contacts the hole bottom of the joint body 1. Next, the nut 4 is rotated by hand and moved toward the joint body, and the above-described components are assembled in the state before tightening as shown in FIGS.
Next, when the nut 4 is tightened and the conical portion 5 c of the thrust washer outer wall is pushed by the conical portion 4 a of the nut 4, the conical portion 5 a of the inner wall of the thrust washer pushes the sleeve 2. As a result, the sleeve 2 moves toward the joint body, and the front end of the sleeve 2 comes into contact with the conical portion 1b of the joint body 1 so that the sleeve 2 is squeezed, and the tube 6 is held by the projection 2a on the front side of the sleeve 2. At that time, the seal 3 is pushed into a gap formed between the conical portion 1 b of the joint body 1 and the pipe 6. As a result, fluid leakage can be prevented. At the same time, the conical portion 2e of the outer wall of the sleeve is also squeezed so that the cutting blade 2b formed on the inner wall holds the tube 6 and is difficult to insert into the tube 6. Thereby, the pipe | tube 6 can be hold | maintained. Further, when the nut 4 is tightened, the end surface 1c of the joint body 11 and the front end surface 5b of the thrust washer 5 come into contact with each other, and the tightening torque rapidly increases. As a result, the tightening is completed and the state shown in FIG. 4 is obtained.
As described above, the angle (10 ° to 20 °) of the conical portion 5a of the inner wall of the thrust washer is made smaller than the angle (40 ° to 90 °) of the conical portion 4a of the nut 4, and the thrust washer 5 is transferred to the sleeve 2. The radial force of the applied force is balanced with the axial component force. This is because the thrust washer 5 receives the reaction force in the radial direction of the portion 2 b where the sleeve 2 holds the tube 6, and the force to press the thrust washers 5 and the sliding portions 4 a and 5 c of the nut 4 is shown in FIG. Compared to the conventional pipe joint shown, the sleeve 2 and the pipe 6 do not rotate together when the nut rotates. Further, as shown in FIG. 5, the torque at the time of tightening the nut is lower than that of the conventional pipe joint shown in FIG. 7, and the torque increases rapidly when the tightening is completed, so that it is easy to grasp when the tightening is completed.
Further, in this joint, since the thrust washer 5 spreads moderately and tightens the sleeve 2, even if the dimensional tolerance of the outer diameter of the pipe 6 is large, the amount of biting can be kept constant. Furthermore, since the sleeve 2 holds the pipe 6 at two points on the joint main body side and the nut side, it is strong against a lateral force applied to the pipe 6.

本発明の管継手の要部断面図で、締め付け前の状態を示す図である。It is principal part sectional drawing of the pipe joint of this invention, and is a figure which shows the state before clamping. 本管継手の分解説明図である。It is decomposition | disassembly explanatory drawing of a main pipe joint. 本管継手の締め付け前の状態を示す図である。It is a figure which shows the state before fastening of a main pipe joint. 本管継手の締め付け後の状態を示す図である。It is a figure which shows the state after tightening of a main pipe joint. 本発明の管継手と従来例２の管継手の締め付けトルクの変化を示す図である。It is a figure which shows the change of the fastening torque of the pipe joint of this invention, and the pipe joint of the prior art example 2. FIG. 従来例１のソフトシール管継手の断面図である。It is sectional drawing of the soft seal pipe joint of the prior art example 1. 従来例２のソフトシール管継手の断面図である。It is sectional drawing of the soft seal pipe joint of the prior art example 2.

符号の説明Explanation of symbols

１ 継手本体
１ａ 穴
１ｂ 円錐部
１ｃ 端面
１ｄ ネジ部
２ スリーブ
２ａ 突起部
２ｂ 切込み刃
２ｃ 突起部
２ｄ 端面
２ｅ 円錐部
２ｆ 突起部
３ シール
４ ナット
４ａ 円錐部
５ スラストワッシャー
５ａ 円錐部
５ｂ 面
５ｃ 円錐部
６ 管DESCRIPTION OF SYMBOLS 1 Joint main body 1a Hole 1b Conical part 1c End surface 1d Thread part 2 Sleeve 2a Protrusion part 2b Cutting blade 2c Protrusion part 2d End surface 2e Conical part 2f Protrusion part 3 Seal 4 Nut 4a Conical part 5 Thrust washer 5a Conical part 5b Surface 5c Conical part 6 pipes

Claims (3)

継手本体（１）と、スリーブ（２）と、継手本体（１）とスリーブ（２）間に設けられるシール（３）と、継手本体（１）にねじ込まれるナット（４）と、スリーブ（２）とナット（４）間に設けられるスラストワッシャー（５）とからなり、
前記スリーブ（２）の本体側内壁には、管（６）の外壁を摺動する突起部（２ａ）が形成され、ナット側内壁には、管（６）に係合する切込み刃（２ｂ）が形成され、ナット側外壁には、円錐部（２ｅ）が形成されており、さらに前記スリーブ（２）の中央近傍の外壁には、前記スラストワッシャー（５）の内壁を摺動可能に保持する突起部（２ｆ）が形成されており、
前記スラストワッシャー（５）のナット側内壁には、前記スリーブ（２）の円錐部（２ｅ）と係合する円錐部（５ａ）が形成され、本体側端部には、継手本体（１）の端面（１ｃ）と係合してスリーブ（２）のくい込みを制限する面（５ｂ）が形成されており、
前記ナット（４）には、スラストワッシャー外壁の円錐部（５ｃ）に係合する円錐部（４ａ）が形成されており、前記スラストワッシャー内壁の円錐部（５ａ）の角度は、前記ナット（４）の円錐部（４ａ）の角度より小さいことを特徴とする管継手。 Joint body (1), sleeve (2), seal (3) provided between joint body (1) and sleeve (2), nut (4) screwed into joint body (1), sleeve (2 ) And a thrust washer (5) provided between the nut (4),
A protrusion (2a) that slides on the outer wall of the pipe (6) is formed on the inner wall of the sleeve (2), and a cutting blade (2b) that engages the pipe (6) is formed on the inner wall of the nut (2). A conical portion (2e) is formed on the nut-side outer wall, and the inner wall of the thrust washer (5) is slidably held on the outer wall near the center of the sleeve (2). The protrusion (2f) is formed,
A conical portion (5a) that engages with the conical portion (2e) of the sleeve (2) is formed on the inner wall of the thrust washer (5) on the nut side. A surface (5b) that engages with the end surface (1c) and restricts the biting of the sleeve (2) is formed,
The nut (4) is formed with a conical portion (4a) that engages with the conical portion (5c) of the outer wall of the thrust washer, and the angle of the conical portion (5a) of the inner wall of the thrust washer depends on the nut (4 A pipe joint characterized by being smaller than the angle of the conical part (4a). 前記スリーブ（２）の継手本体側の外壁が前記継手本体（１）の円錐部（１ｂ）に係合し、スリーブ（２）の突起部（２ａ）が管（６）に係合して、前記シール（３）を継手本体（１）の円錐部（１ｂ）内に密封保持することを特徴とする請求項１記載の管継手。 The outer wall on the joint body side of the sleeve (2) is engaged with the conical portion (1b) of the joint body (1), and the protrusion (2a) of the sleeve (2) is engaged with the pipe (6). The pipe joint according to claim 1, characterized in that the seal (3) is hermetically held in the conical part (1b) of the joint body (1). 前記切込み刃（２ｂ）は、継手本体側に刃先が向けられた多刃であることを特徴とする請求項１または２記載の管継手。
The pipe joint according to claim 1 or 2, wherein the cutting blade (2b) is a multi-blade having a cutting edge directed to the joint body side.
JP2004381642A 2004-12-01 2004-12-01 Pipe fitting Expired - Fee Related JP4599158B2 (en)

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KR101393395B1 (en) * 2013-09-30 2014-05-12 주식회사 우정메카트로닉스 Pipe and nut assembly for fixing pipe
JP2015197200A (en) * 2014-04-03 2015-11-09 イハラサイエンス株式会社 Joint
CN106571613A (en) * 2016-11-15 2017-04-19 江苏泰普特电气仪表有限公司 Novel explosion-proof armor stuffing box

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5142120A (en) * 1974-10-05 1976-04-09 Tatsuya Takagi
JPS5560782A (en) * 1978-10-31 1980-05-08 Normark Olov Magnus Joint for machine elements
JPH0238589U (en) * 1988-09-07 1990-03-14
JPH0640565U (en) * 1992-10-29 1994-05-31 株式会社リケン Mechanical fitting

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5142120A (en) * 1974-10-05 1976-04-09 Tatsuya Takagi
JPS5560782A (en) * 1978-10-31 1980-05-08 Normark Olov Magnus Joint for machine elements
JPH0238589U (en) * 1988-09-07 1990-03-14
JPH0640565U (en) * 1992-10-29 1994-05-31 株式会社リケン Mechanical fitting

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