JP2013148163A - Pipe joint - Google Patents

Pipe joint Download PDF

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JP2013148163A
JP2013148163A JP2012009082A JP2012009082A JP2013148163A JP 2013148163 A JP2013148163 A JP 2013148163A JP 2012009082 A JP2012009082 A JP 2012009082A JP 2012009082 A JP2012009082 A JP 2012009082A JP 2013148163 A JP2013148163 A JP 2013148163A
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Prior art keywords
fastening member
ring
adapter
shaped tube
pipe joint
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JP5867815B2 (en
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Nobuyuki Asari
信之 浅里
Yasuaki Taniguchi
泰章 谷口
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Sapporo Breweries Ltd
Nitta Corp
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Sapporo Breweries Ltd
Nitta Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a pipe joint, in which a liquid pool is not produced while maintaining sealability and rotation performance between pipes.SOLUTION: An L-shaped tube 11 to be connected to a fastening member 12 is inserted in the nut-shaped fastening member 12. An adapter 13 is fitted to and inserted in the fastening member 12, and the L-shaped tube 11 is held between the adapter 13 and the fastening member 12 in a turnable and locking manner. A tapered surface 13D is formed on a fore end outer circumferential edge of a sleeve part 13A of the adapter 13 to be fitted to and inserted in an end part 11B of the L-shaped tube 11. A triangular groove is formed of the tapered surface 13D, a boundary surface 11D of the L-shaped tube 11, and an inner circumferential surface of the end part 11B, and an O-ring is arranged in the triangular groove and compressed therein. The G dimension of the triangular groove is set to be 0.9 to 1.1 W with respect to an O-ring wire diameter W.

Description

本発明は、管同士を回転自在に接続する管継手に関する。   The present invention relates to a pipe joint that connects pipes rotatably.

ナット状の締結部材とその内側に嵌挿されるアダプタとの間に例えばＬ字型の管の一端が回転自在かつ抜け止め状態で嵌着される管継手が知られている（特許文献１参照）。特許文献１の管継手では、気密性を維持するとともに管の回転性を維持ためにＯリングをＬ字管の円筒内周面とアダプタの円筒外周面の間に介挿している。   A pipe joint is known in which, for example, one end of an L-shaped pipe is rotatably fitted between a nut-shaped fastening member and an adapter fitted inside the nut-shaped fastening member (see Patent Document 1). . In the pipe joint of Patent Document 1, an O-ring is inserted between the cylindrical inner peripheral surface of the L-shaped tube and the cylindrical outer peripheral surface of the adapter in order to maintain airtightness and maintain the rotation of the pipe.

特許第３９３２５０９号公報Japanese Patent No. 3932509

しかし特許文献１の構成では、Ｏリングの両側にＬ字管の円筒内周面とアダプタの円筒外周面が摺接する区間が形成されるため液体を流通させる場合、管内からこの区間まで液体が滲入し液溜りとなる。飲料、食品、医薬品などを扱う場合、液溜りの発生は特に問題となる。   However, in the configuration of Patent Document 1, a section where the cylindrical inner peripheral surface of the L-shaped tube and the cylindrical outer peripheral surface of the adapter are in sliding contact is formed on both sides of the O-ring. It becomes a puddle. When handling beverages, foods, pharmaceuticals, etc., the occurrence of liquid pools is particularly problematic.

本発明は、管同士の間のシール性、回転性を維持しながらも液溜りが発生しない管継手を提供することを課題としている。   It is an object of the present invention to provide a pipe joint that does not generate a liquid pool while maintaining sealing performance and rotational performance between pipes.

本発明の管継手は、締結部材と、締結部材に連結される管と、締結部材内に配置され管を締結部材との間に回転自在かつ抜け止め状態で保持するアダプタと、アダプタと管の間に介挿されるＯリングとを備える管継手であって、管内に嵌挿されるアダプタのスリーブ部の先端外周縁にテーパー面が形成されるとともにテーパー面と管の内側面との間で三角溝が形成され、Ｏリングがこの三角溝内に配置され、三角溝のＧ寸法が、Ｏリング線径Ｗに対して０．９Ｗ〜１．１Ｗとされたことを特徴としている。   The pipe joint of the present invention includes a fastening member, a pipe connected to the fastening member, an adapter that is disposed in the fastening member and holds the pipe in a rotatable and retaining state between the fastening member, and the adapter and the pipe. A pipe joint including an O-ring interposed therebetween, wherein a tapered surface is formed at the outer peripheral edge of the tip of the sleeve portion of the adapter inserted into the pipe, and a triangular groove is formed between the tapered surface and the inner surface of the pipe. The O-ring is disposed in the triangular groove, and the G dimension of the triangular groove is 0.9 W to 1.1 W with respect to the O-ring wire diameter W.

液溜りの発生をより低減するには、スリーブ部の先端と前記管の内側面との間の隙間は０．２７Ｗ〜０．４７Ｗであることが好ましく、更にスリーブ部の内周面からテーパー面までの距離を０．２７Ｗ〜０．４０Ｗとすることが好ましい。また、外部からの異物の侵入を防止するために、スリーブ部の外周面と管の内周面の間に第２のＯリングを介挿してもよい。   In order to further reduce the occurrence of liquid accumulation, the gap between the tip of the sleeve portion and the inner surface of the tube is preferably 0.27 W to 0.47 W, and further from the inner peripheral surface of the sleeve portion to a tapered surface. It is preferable to set the distance to 0.27 W to 0.40 W. Further, a second O-ring may be interposed between the outer peripheral surface of the sleeve portion and the inner peripheral surface of the pipe in order to prevent foreign matter from entering from the outside.

本発明によれば、管同士の間のシール性、回転性を維持しながらも液溜りが発生しない管継手を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the pipe joint which does not generate | occur | produce a liquid pool can be provided, maintaining the sealing performance between pipes and rotation.

本実施形態の管継手の部分断面図である。It is a fragmentary sectional view of the pipe joint of this embodiment. Ｏリング装着部の拡大断面図である。It is an expanded sectional view of an O-ring mounting part.

以下、本発明の実施の形態を、図面を参照して説明する。図１は、本発明の一実施形態である管継手の構成を示す部分断面図である。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a partial cross-sectional view showing a configuration of a pipe joint according to an embodiment of the present invention.

図１は、本実施形態の管継手１０の軸に沿った半分を断面図として描き、残りを側面図として描いたものである。管継手１０は、例えば液配管に用いられる管継手であり、管１１、締結部材１２、アダプタ１３、Ｏリング１４とから主に構成される。   FIG. 1 shows a half along the axis of the pipe joint 10 of this embodiment as a cross-sectional view and the rest as a side view. The pipe joint 10 is a pipe joint used for, for example, a liquid pipe, and mainly includes a pipe 11, a fastening member 12, an adapter 13, and an O-ring 14.

本実施形態において管１１は例えばＬ字形状を呈するＬ字管であり、Ｌ字管１１の一端は後述するように締結部材１２に回転自在に接続される。一方、Ｌ字管１１の他端には例えばプッシュイン継手１５が設けられ、可撓チューブ（図示せず）が接続される。   In the present embodiment, the tube 11 is an L-shaped tube having an L-shape, for example, and one end of the L-shaped tube 11 is rotatably connected to a fastening member 12 as described later. On the other hand, for example, a push-in joint 15 is provided at the other end of the L-shaped tube 11 and a flexible tube (not shown) is connected thereto.

また本実施形態において締結部材１２は、例えば手回しで用いられるナット状の締結部品であり、外周部には周に沿って一定の間隔で滑り止めのノブ状の突起１２Ａが設けられる。締結部材１２の内側には雌ネジ１２Ｂが螺刻され、通常は機器等の固定部あるいは固定されたパイプなどに螺着される。   Further, in the present embodiment, the fastening member 12 is a nut-like fastening part that is used, for example, by hand turning, and is provided with knob-like projections 12A that are non-slip at regular intervals along the circumference. A female screw 12B is threaded on the inside of the fastening member 12, and is usually screwed to a fixed part of a device or a fixed pipe.

締結部材１２内にはＬ字管１１を締結部材１２に回転自在に係合させるアダプタ１３が装着される。アダプタ１３は、フランジ付のスリーブ形状を呈し、スリーブ部１３ＡはＬ字管１１内に嵌挿され、フランジ部１３Ｂは締結部材１２内の係止面１２Ｃに当接されその軸方向の運動が規制される。   In the fastening member 12, an adapter 13 is mounted for rotatably engaging the L-shaped tube 11 with the fastening member 12. The adapter 13 has a sleeve shape with a flange, the sleeve portion 13A is fitted into the L-shaped tube 11, and the flange portion 13B is brought into contact with the locking surface 12C in the fastening member 12 to restrict its axial movement. Is done.

すなわち、締結部材１２には、雌ネジ１２Ｂが形成された締結部１２Ｄと、その内径が雌ネジ１２Ｂの内径よりも狭くＬ字管１１の接続に用いられる接続部１２Ｅが設けられ、締結部１２Ｄの内周面と接続部１２Ｅの内周面の間には円筒軸に垂直な段部が係止面１２Ｃとして形成される。Ｌ字管１１が接続部１２Ｅ側の開口から締結部材１２内に嵌挿された状態において、アダプタ１３は締結部１２Ｄ側の開口から締結部材１２内に挿入され、スリーブ部１３ＡがＬ字管１１内に嵌挿される。   That is, the fastening member 12 is provided with a fastening portion 12D in which a female screw 12B is formed, and a connecting portion 12E that has an inner diameter smaller than the inner diameter of the female screw 12B and is used for connecting the L-shaped tube 11, and the fastening portion 12D. A step portion perpendicular to the cylindrical axis is formed as a locking surface 12C between the inner peripheral surface of the connecting portion and the inner peripheral surface of the connecting portion 12E. In a state where the L-shaped tube 11 is fitted and inserted into the fastening member 12 from the opening on the connection portion 12E side, the adapter 13 is inserted into the fastening member 12 from the opening on the fastening portion 12D side, and the sleeve portion 13A is inserted into the L-shaped tube 11. It is inserted inside.

フランジ部１３Ｂの外径は、接続部１２Ｅの内径よりも大きく形成され、フランジ部１３Ｂと係止面１２Ｃが当接することによりＬ字管１１の接続部１２Ｅからの抜脱が防止される。また、締結部材１２が固定部（図示せず）に螺着されると、フランジ部１３Ｂは固定部の雄ネジの先端（図示せず）と係止面１２Ｃとの間にパッキング等を介して挟まれ、その動きは軸方向、回転方向の何れにも規制され、締結部材１２とアダプタ１３は一体的に固定部に固定される。   The outer diameter of the flange portion 13B is formed larger than the inner diameter of the connection portion 12E, and the flange portion 13B and the locking surface 12C come into contact with each other, so that the L-shaped tube 11 is prevented from being detached from the connection portion 12E. Further, when the fastening member 12 is screwed to the fixing portion (not shown), the flange portion 13B is interposed between the front end (not shown) of the male screw of the fixing portion and the locking surface 12C via a packing or the like. The movement is restricted in both the axial direction and the rotational direction, and the fastening member 12 and the adapter 13 are integrally fixed to the fixing portion.

また、アダプタ１３のスリーブ部１３ＡとＬ字管１１の係合は、スリーブ部１３Ａの外周に形成された円環状の突起１３ＣをＬ字管１１の内周面に形成された円環状の溝１１Ａの嵌合により行われ、これによりＬ字管１１はアダプタ１３に対して軸方向への運動が規制されながらも周方向へは回転自在とされる。なお、アダプタ１３は例えば樹脂などの弾性を有する素材から形成され、スリーブ部１３ＡがＬ字管１１へ挿入される際、スリーブ部１３Ａは突起１３Ｃが溝１１Ａに嵌合されるまで径方向内側へ圧縮される。   Further, the sleeve 13A of the adapter 13 and the L-shaped tube 11 are engaged with each other by connecting an annular protrusion 13C formed on the outer periphery of the sleeve 13A with an annular groove 11A formed on the inner peripheral surface of the L-shaped tube 11. As a result, the L-shaped tube 11 is rotatable in the circumferential direction while the movement in the axial direction is restricted with respect to the adapter 13. The adapter 13 is formed of an elastic material such as resin, and when the sleeve portion 13A is inserted into the L-shaped tube 11, the sleeve portion 13A is radially inward until the projection 13C is fitted in the groove 11A. Compressed.

更に詳細に説明すると、Ｌ字管１１の接続側の端部１１Ｂでは、管本体１１Ｃに比べその外径および内径が大きく形成され、アダプタ１３のスリーブ部１３Ａの軸方向長さと、Ｌ字管１１の端部１１Ｂの軸方向長さは略同じ長さとされる。すなわち、管本体１１Ｃの内周面と端部１１Ｂの内周面の境界には、軸方向に垂直な境界面１１Ｄが形成され、アダプタ１３の突起１３Ｃと端部１１Ｂに設けられた溝１１Ａが嵌合すると、フランジ部１３Ｂは端部１１Ｂの先端面に僅かな隙間を隔てて隣接し、スリーブ部１３Ａの先端は、後述する所定の隙間を隔てて境界面１１Ｄに隣接する。また、管本体１１Ｃの内径とスリーブ部１３Ａの内径は略等しく形成され、流通される流体の圧力損失の発生が防止される。   More specifically, the end 11B on the connection side of the L-shaped tube 11 has a larger outer diameter and inner diameter than the tube main body 11C, and the axial length of the sleeve portion 13A of the adapter 13 and the L-shaped tube 11 The lengths of the end portions 11B in the axial direction are substantially the same. That is, a boundary surface 11D perpendicular to the axial direction is formed at the boundary between the inner peripheral surface of the tube main body 11C and the inner peripheral surface of the end portion 11B, and the protrusion 13C of the adapter 13 and the groove 11A provided in the end portion 11B are formed. When fitted, the flange portion 13B is adjacent to the distal end surface of the end portion 11B with a slight gap, and the distal end of the sleeve portion 13A is adjacent to the boundary surface 11D with a predetermined gap described later. Further, the inner diameter of the tube main body 11C and the inner diameter of the sleeve portion 13A are formed to be substantially equal, and the occurrence of pressure loss of the circulating fluid is prevented.

更に本実施形態では、スリーブ部１３Ａの先端部の外周縁にテーパー面１３Ｄが設けられる。テーパー面１３Ｄには、Ｏリング１４が配置され、組立時Ｏリング１４は、テーパー面１３Ｄ、境界面１１Ｄ、端部１１Ｂの内周面との間で圧縮され、Ｌ字管１１とアダプタ１３の間の隙間を気密する。   Further, in the present embodiment, a tapered surface 13D is provided on the outer peripheral edge of the distal end portion of the sleeve portion 13A. An O-ring 14 is disposed on the tapered surface 13D. During assembly, the O-ring 14 is compressed between the tapered surface 13D, the boundary surface 11D, and the inner peripheral surface of the end portion 11B. Airtight between the gaps.

また本実施形態では、外側からの異物の侵入をより確実に防止するため、スリーブ部１３Ａの外周面と端部１１Ｂの間にＯリング１６が介挿される。図１の例では、スリーブ１３Ａの外周面に円環溝が設けられ、ここにＯリング１６が装置される。またスリーブ１３Ａの外周面に形成された円環溝に対応してＬ字管１１の端部１１Ｂの内周面には段部が形成され、Ｏリング１６はこの円環溝と段部の間で圧縮される。なお、本実施形態では、Ｌ字管１１の端部１１Ｂの外径は、公差を除き締結部材１２の接続部１２Ｅの内径に略等しく形成される。   In the present embodiment, an O-ring 16 is inserted between the outer peripheral surface of the sleeve portion 13A and the end portion 11B in order to more reliably prevent foreign matter from entering from the outside. In the example of FIG. 1, an annular groove is provided on the outer peripheral surface of the sleeve 13 </ b> A, and an O-ring 16 is installed here. Corresponding to the annular groove formed on the outer peripheral surface of the sleeve 13A, a step portion is formed on the inner peripheral surface of the end portion 11B of the L-shaped tube 11, and the O-ring 16 is provided between the annular groove and the step portion. It is compressed with. In the present embodiment, the outer diameter of the end portion 11B of the L-shaped tube 11 is formed substantially equal to the inner diameter of the connection portion 12E of the fastening member 12 except for tolerance.

次に図２を参照して、本実施形態のテーパー面１３ＤとＯリング１４を用いたシール構造についてより詳細に説明する。図２は、Ｏリング１４と、これを取り囲むテーパー面１３Ｄ、境界面１１Ｄ、端部１１Ｂの内周面１１Ｅで形成される三角溝の拡大段面図である。なおＯリングの大きさは圧縮前の状態として示され、その一部が破線で描かれている。   Next, with reference to FIG. 2, the seal structure using the tapered surface 13D and the O-ring 14 of this embodiment will be described in more detail. FIG. 2 is an enlarged step view of a triangular groove formed by the O-ring 14, the tapered surface 13 </ b> D surrounding the O-ring 14, the boundary surface 11 </ b> D, and the inner peripheral surface 11 </ b> E of the end portion 11 </ b> B. The size of the O-ring is shown as a state before compression, and a part thereof is drawn with a broken line.

本実施形態のテーパー面１３Ｄは、円筒軸方向に対し４５°の角度で設けられ、三角溝のＧ寸法（テーパー面に対面する２辺の長さ）は、Ｏリング線径Ｗに対して０．９Ｗ〜１．１Ｗとされ、スリーブ部１３Ａの先端と境界面１１Ｄの隙間ｔは、０．２７Ｗ〜０．４７Ｗとされる。更に、スリーブ部１３Ａの内周面からテーパー面１３Ｄまでの距離Ｔは０．２７Ｗ〜０．４０Ｗとされる。   The tapered surface 13D of this embodiment is provided at an angle of 45 ° with respect to the cylindrical axis direction, and the G dimension of the triangular groove (the length of the two sides facing the tapered surface) is 0 with respect to the O-ring wire diameter W. .9 W to 1.1 W, and the gap t between the tip of the sleeve portion 13 </ b> A and the boundary surface 11 </ b> D is 0.27 W to 0.47 W. Furthermore, the distance T from the inner peripheral surface of the sleeve portion 13A to the tapered surface 13D is 0.27W to 0.40W.

以上のように構成することで、圧縮されたＯリングが略三角溝を充填し、液溜りの発生が防止されるとともにＯリングに掛かる軸方向力が低減され、アダプタとＬ字管の間の回転運動が阻害されない。   By configuring as described above, the compressed O-ring fills the substantially triangular groove, the occurrence of liquid pool is prevented, and the axial force applied to the O-ring is reduced, so that the space between the adapter and the L-shaped tube is reduced. Rotational motion is not hindered.

なおテーパー面１３Ｄに替え、スリーブ部１３Ａの先端外周縁を四角く切り落とし、すなわち先端部の外周角部を境界面１１Ｄや端部１１Ｂの内周面１１Ｅに平行な面で切り落とし、Ｏリング溝としてもよい。   In place of the tapered surface 13D, the outer peripheral edge of the sleeve portion 13A is cut off into a square shape, that is, the outer peripheral corner portion of the tip portion is cut off in a plane parallel to the boundary surface 11D and the inner peripheral surface 11E of the end portion 11B. Good.

なお、本実施形態では締結部材１２にネジを用いた方式が採用されたが他の接合方式を採用してもよい。また本実施形態ではＬ字管を例に説明を行ったが、管本体は屈曲していなくてもよく、屈曲角度も本実施形態に限定されるものではない。また管にはプッシュイン継手（１５）が装着されたがこれに限定されるものではない。   In this embodiment, a method using a screw for the fastening member 12 is adopted, but another joining method may be adopted. In the present embodiment, an L-shaped tube has been described as an example. However, the tube body may not be bent, and the bending angle is not limited to the present embodiment. Moreover, although the push-in joint (15) was attached to the pipe | tube, it is not limited to this.

１０ 管継手
１１ Ｌ字管
１１Ａ 円環状溝
１１Ｂ 接続側端部
１１Ｃ 管本体
１１Ｄ 境界面
１１Ｅ 端部内周面
１２ 締結部材
１３ アダプタ
１３Ａ スリーブ部
１３Ｂ フランジ部
１３Ｃ 円環状突起
１３Ｄ テーパー面
１４ Ｏリング
１５ プッシュイン継手
１６ Ｏリング DESCRIPTION OF SYMBOLS 10 Pipe joint 11 L-shaped pipe 11A Toroidal groove 11B Connection side end part 11C Pipe body 11D Interface 11E End part inner peripheral surface 12 Fastening member 13 Adapter 13A Sleeve part 13B Flange part 13C Annular protrusion 13D Tapered surface 14 O-ring 15 Push Inn joint 16 O-ring

Claims (4)

締結部材と、前記締結部材に連結される管と、前記締結部材内に配置され前記管を前記締結部材との間に回転自在かつ抜け止め状態で保持するアダプタと、前記アダプタと前記管の間に介挿されるＯリングとを備える管継手であって、
前記管内に嵌挿される前記アダプタのスリーブ部の先端外周縁にテーパー面が形成されるとともに前記テーパー面と前記管の内側面との間で三角溝が形成され、前記Ｏリングが前記三角溝内に配置され、前記三角溝のＧ寸法が、前記ＯリングのＯリング線径Ｗに対して０．９Ｗ〜１．１Ｗとされることを特徴とする管継手。 A fastening member, a tube connected to the fastening member, an adapter disposed in the fastening member and rotatably held between the fastening member and the adapter and the tube A pipe joint provided with an O-ring inserted in
A taper surface is formed on the outer periphery of the tip of the sleeve portion of the adapter to be inserted into the tube, a triangular groove is formed between the taper surface and the inner surface of the tube, and the O-ring is formed in the triangular groove. And the G dimension of the triangular groove is 0.9 W to 1.1 W with respect to the O-ring wire diameter W of the O-ring. 前記スリーブ部の先端と前記管の内側面との間の隙間が０．２７Ｗ〜０．４７Ｗであることを特徴とする請求項１に記載の管継手。   The pipe joint according to claim 1, wherein a gap between a tip of the sleeve portion and an inner side surface of the pipe is 0.27W to 0.47W. 前記スリーブ部の内周面から前記テーパー面までの距離が０．２７Ｗ〜０．４０Ｗであることを特徴とする請求項２に記載の管継手。   The pipe joint according to claim 2, wherein a distance from an inner peripheral surface of the sleeve portion to the tapered surface is 0.27W to 0.40W. 前記スリーブ部の外周面と前記管の内周面の間に第２のＯリングが介挿されることを特徴とする請求項３に記載の管継手。   The pipe joint according to claim 3, wherein a second O-ring is interposed between the outer peripheral surface of the sleeve portion and the inner peripheral surface of the pipe.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0735873B2 (en) * 1990-09-04 1995-04-19 株式会社豊田自動織機製作所 Pipe fittings for hydraulic piping
JPH10318471A (en) * 1997-04-30 1998-12-04 Salter Labs Turn connector
JP2003227586A (en) * 2001-11-29 2003-08-15 Nitta Moore Co Pipe joint
JP2004036846A (en) * 2002-07-05 2004-02-05 Nitta Moore Co Pipe joint
JP2004092679A (en) * 2002-08-29 2004-03-25 Nitta Moore Co Pipe joint

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0735873B2 (en) * 1990-09-04 1995-04-19 株式会社豊田自動織機製作所 Pipe fittings for hydraulic piping
JPH10318471A (en) * 1997-04-30 1998-12-04 Salter Labs Turn connector
JP2003227586A (en) * 2001-11-29 2003-08-15 Nitta Moore Co Pipe joint
JP2004036846A (en) * 2002-07-05 2004-02-05 Nitta Moore Co Pipe joint
JP2004092679A (en) * 2002-08-29 2004-03-25 Nitta Moore Co Pipe joint

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