JP2006038169A - Pipe coupling - Google Patents

Pipe coupling Download PDF

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Publication number
JP2006038169A
JP2006038169A JP2004221996A JP2004221996A JP2006038169A JP 2006038169 A JP2006038169 A JP 2006038169A JP 2004221996 A JP2004221996 A JP 2004221996A JP 2004221996 A JP2004221996 A JP 2004221996A JP 2006038169 A JP2006038169 A JP 2006038169A
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Japan
Prior art keywords
lock ring
tube
ring
fixed
pipe joint
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Granted
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JP2004221996A
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Japanese (ja)
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JP4700938B2 (en
Inventor
Atsushi Izumi
敦 泉
Shunji Sato
俊次 佐藤
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Nitta Moore Co
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Nitta Moore Co
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Priority to JP2004221996A priority Critical patent/JP4700938B2/en
Priority to KR1020040075855A priority patent/KR101108348B1/en
Priority to CNB2004101000325A priority patent/CN100478600C/en
Publication of JP2006038169A publication Critical patent/JP2006038169A/en
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Publication of JP4700938B2 publication Critical patent/JP4700938B2/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L37/00—Couplings of the quick-acting type
    • F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
    • F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
    • F16L37/091—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of a ring provided with teeth or fingers
    • F16L37/0915—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of a ring provided with teeth or fingers with a separate member for releasing the coupling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L37/00—Couplings of the quick-acting type
    • F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
    • F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
    • F16L37/091—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of a ring provided with teeth or fingers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L17/00—Joints with packing adapted to sealing by fluid pressure
    • F16L17/02—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket
    • F16L17/03—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket having annular axial lips
    • F16L17/032—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket having annular axial lips the sealing rings having only one lip
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces

Abstract

<P>PROBLEM TO BE SOLVED: To provide tube holding power higher than conventional power, while making a tube rotatable. <P>SOLUTION: This pipe coupling has a lock ring 3 having a claw 2 for holding the tube T. The lock ring 3 is fixed in close contact to a back ring 4 rotatably installed in a coupling body 1. Since the lock ring is fixed in close contact to the back ring rotatably installed in the coupling body, when force is applied more than a structure merely arranged between a collar and the back ring having conventionally and respectively a tolerance, the lock ring is hardly displaced, and is thereby hardly reversed. Close contact and a fixation of the lock ring can be performed by press-in and calking to the back ring. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

この発明は、一般空気圧用途やその他の流体圧用途に使用できる配管用の管継手に関するものである。   The present invention relates to a pipe joint that can be used for general pneumatic applications and other fluid pressure applications.

従来より、内周部にチューブを保持するための爪を有する係止リング(ロックリング)が管継手本体内に収容されており、前記係止リングによりチューブを保持する管継手が知られている（例えば、特許文献１参照）。   Conventionally, a locking ring (lock ring) having a claw for holding the tube on the inner peripheral portion is accommodated in the pipe joint body, and a pipe joint that holds the tube by the locking ring is known. (For example, refer to Patent Document 1).

図５に示すように、この管継手は継手本体21内のカラー22とバックリング23 (シール材24を押圧している)との間にロックリング25が配設してあり、チューブＴを差し込むだけでロックリング25の爪26によってチューブＴの保持が可能である。一方リリース27を押し込むことにより、ロックリング25の爪26を奥側へと押圧した状態でチューブＴを取り外すことができる。   As shown in FIG. 5, in this pipe joint, a lock ring 25 is disposed between a collar 22 in the joint body 21 and a back ring 23 (pressing the sealing material 24), and the tube T is inserted. The tube T can be held by the claw 26 of the lock ring 25 only. On the other hand, by pushing the release 27, the tube T can be removed in a state where the claw 26 of the lock ring 25 is pressed to the back side.

また、前記カラー22は継手本体21にかしめて固定されるキャップ28とは別体であって継手本体21に対して回転可能とされており、配管作業時などにチューブＴとロックリング25とカラー22とバックリング23とを継手本体21に対して一定的に相対回転させることが出来る。   The collar 22 is separate from the cap 28 that is caulked and fixed to the joint body 21 and is rotatable with respect to the joint body 21. The tube T, the lock ring 25, and the collar are used during piping work. 22 and the back ring 23 can be rotated relative to the joint body 21 in a constant manner.

しかし、ロックリング25やバックリング23やカラー22はそれぞれ組立て上の公差を有しており、これらの間に隙間が形成されることがあり、その結果チューブＴに引っ張り力が加わった際にロックリング25が前記隙間内で変位して反転し内径が拡大してチューブＴが抜けるような事態となってしまい、高いチューブ保持力が得られない場合があるという問題があった。
特開２００１―２４１５８３号公報（図１） However, the lock ring 25, the back ring 23, and the collar 22 each have tolerances in assembly, and a gap may be formed between them. As a result, the tube T is locked when a tensile force is applied. As a result, the ring 25 is displaced and reversed in the gap, the inner diameter is enlarged and the tube T is pulled out, and there is a problem that a high tube holding force may not be obtained.
JP 2001-241583 A (FIG. 1)

そこでこの発明は、チューブが回転可能であると共に従来よりも高いチューブ保持力を得ることができる管継手を提供しようとするものである。   Therefore, the present invention is intended to provide a pipe joint in which a tube can be rotated and a tube holding force higher than that in the prior art can be obtained.

前記課題を解決するためこの発明では次のような技術的手段を講じている。
(１)この発明の管継手は、チューブを保持する爪を有するロックリングを具備し、継手本体に回転可能に内装されるバックリングに対し前記ロックリングは密着・固定されたことを特徴とする。 In order to solve the above problems, the present invention takes the following technical means.
(1) A pipe joint according to the present invention includes a lock ring having a claw for holding a tube, and the lock ring is closely attached to and fixed to a back ring rotatably mounted in a joint body. .

この管継手では、継手本体に回転可能に内装されるバックリングに対してロックリングが密着・固定されたので、従来のようにそれぞれ公差のあるカラーとバックリングとの間に単に配設される構造よりも力が加わった際にロックリングは変位がし難くよって反転し難い。前記ロックリングの密着・固定は、バックリングへの圧入や加締めなどにより行うことができる。   In this pipe joint, since the lock ring is closely attached and fixed to the back ring rotatably mounted in the joint body, it is simply disposed between the collar and the back ring having tolerances as in the prior art. When a force is applied rather than the structure, the lock ring is difficult to displace because it is difficult to displace. The lock ring can be adhered and fixed by press-fitting or crimping the back ring.

(２) 前記バックリングに対しロックリングはチューブの挿入方向に密着・固定されたこととしてもよい。  (2) The lock ring may be closely attached and fixed in the tube insertion direction with respect to the buckling.

このように構成すると、ロックリングはバックリングの壁面にチューブの挿入方向に押付けられているが、チューブに引張り力が作用するとロックリングの爪(内端)が抜け方向に変位しようとする一方、これに対応しロックリングの外端も回動して変位しようとするものの、ロックリングの外端はバックリングの壁面に押付けられていて回動が妨げられている。したがって、ロックリングの反転は困難でありその内径は拡大し難い。   With this configuration, the lock ring is pressed against the wall surface of the buckling in the tube insertion direction, but when a tensile force acts on the tube, the lock ring claw (inner end) tends to displace in the removal direction, Corresponding to this, the outer end of the lock ring is also rotated and displaced, but the outer end of the lock ring is pressed against the wall surface of the buckling to prevent rotation. Therefore, it is difficult to reverse the lock ring and its inner diameter is difficult to expand.

(３)前記バックリングに対してチューブの挿入口側にキャップを配設し、前記キャップは継手本体に固定したこととしてもよい。  (3) A cap may be disposed on the tube insertion port side with respect to the buckling, and the cap may be fixed to the joint body.

このように構成すると、従来よりも少ない部品点数(カラーの分が減少)でチューブの回転機構を実現することができる。前記キャップは、継手本体にかしめることにより固定することができる。   If comprised in this way, the rotation mechanism of a tube can be implement | achieved by the number of parts (a part for a color | collar decreases) smaller than before. The cap can be fixed by caulking the joint body.

この発明は上述のような構成であり、次の効果を有する。   The present invention is configured as described above and has the following effects.

ロックリングが固定されるバックリングは継手本体に回転可能に内装されているのでチューブは回転可能であると共に、従来のようにそれぞれ公差のあるカラーとバックリングとの間に単に配設される構造よりも力が加わった際にロックリングは変位がし難くよって反転し難いので従来よりも高いチューブ保持力を得ることができる管継手を提供することができる。   Since the back ring to which the lock ring is fixed is rotatably mounted in the joint body, the tube can be rotated and, as in the prior art, a structure that is simply disposed between the collar and the back ring each having a tolerance. When the force is applied, the lock ring is difficult to displace and therefore difficult to reverse, so that it is possible to provide a pipe joint that can obtain a higher tube holding force than before.

以下、この発明の実施の形態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.

図１乃至図４に示すように、この実施形態の管継手は、金属製の筒状の継手本体１内にチューブＴを保持する爪２を有する断面略くの字状の金属製のロックリング３と、継手本体１に回転可能に内装される合成樹脂製のバックリング４と、流体密性を担保するためのゴム製のシール材５と、前記バックリング４を抜け止め状態で固定する金属製のキャップ６と、前記キャップ６に対し進退可能に配設された合成樹脂製のリリース７と、チューブＴを外嵌する内筒８ (継手本体１内に固定されている)とが収容されている。前記バックリング４に対してチューブの挿入口側に配設したキャップ６は、継手本体１にかしめることにより固定している。また、継手本体１の内径に対し、バックリング４の外径は僅かに小径に設定されている。   As shown in FIGS. 1 to 4, the pipe joint of this embodiment is a metal lock ring having a generally U-shaped cross section having a claw 2 for holding a tube T in a metal tubular joint body 1. 3, a synthetic resin back ring 4 rotatably mounted in the joint body 1, a rubber sealing material 5 for ensuring fluid tightness, and a metal that fixes the back ring 4 in a retaining state. A cap 6 made of plastic, a release 7 made of synthetic resin disposed so as to be able to advance and retreat with respect to the cap 6, and an inner cylinder 8 (fixed in the joint body 1) for fitting the tube T are accommodated. ing. A cap 6 disposed on the tube insertion port side with respect to the back ring 4 is fixed by caulking the joint body 1. Further, the outer diameter of the back ring 4 is set to be slightly smaller than the inner diameter of the joint body 1.

図３及び図４に示すように、前記ロックリング３は断面略くの字状を形成する屈曲点９を有し、管継手内でチューブＴを保持するジグザグ状の環状部材としている。   As shown in FIGS. 3 and 4, the lock ring 3 has a bending point 9 having a substantially U-shaped cross section, and is a zigzag annular member that holds the tube T in the pipe joint.

またこの管継手は、断面略くの字状のロックリング３の爪２は管挿入方向に向けて傾斜させて配設しており、チューブＴを差し込むだけでロックリング３の爪２がチューブＴ表面に抜け止め方向に食い込むことによってチューブＴの保持が可能である。一方、リリース７を押し込むことにより、ロックリング３の爪２を奥側へと押圧して逃がした状態でチューブＴを取り外すことができる。   Further, in this pipe joint, the claw 2 of the lock ring 3 having a substantially U-shaped cross section is arranged so as to be inclined toward the tube insertion direction. The tube T can be held by biting into the surface in the retaining direction. On the other hand, by pushing the release 7, the tube T can be removed in a state where the claw 2 of the lock ring 3 is pressed toward the back and released.

そして前記バックリング４に対し、ロックリング３はチューブの挿入方向に強制的に挿入されて密着・固定されている。ロックリング３はバックリング４の段部にチューブの挿入方向に当接し、それ以上の変位は不能な状態となっている。したがって、バックリング４の前記段部Ａの近傍の寸法Ｘ(図２参照)の公差(誤差)に関係なく、ロックリング３は変位が困難な構造である。なお前記ロックリング３の密着・固定は、バックリング４への圧入や加締めなどにより行うことができる。   The lock ring 3 is forcibly inserted and fixed in the tube insertion direction with respect to the back ring 4. The lock ring 3 is in contact with the stepped portion of the back ring 4 in the tube insertion direction and cannot be displaced further. Therefore, regardless of the tolerance (error) of the dimension X (see FIG. 2) of the buckling 4 near the step A, the lock ring 3 has a structure that is difficult to displace. The lock ring 3 can be closely attached and fixed by press-fitting or crimping the back ring 4.

次に、この実施形態の管継手の使用状態を説明する。   Next, the use state of the pipe joint of this embodiment will be described.

この管継手では、ロックリング３が固定されるバックリング４は継手本体１に回転可能に内装されているのでチューブＴは回転可能である。   In this pipe joint, since the back ring 4 to which the lock ring 3 is fixed is rotatably mounted in the joint body 1, the tube T is rotatable.

また、継手本体１に回転可能に内装されるバックリング４に対してロックリング３が密着・固定されたので、従来のようにそれぞれ公差のあるカラー22(図５参照)とバックリング23(図５参照)との間に単に配設される構造よりも力が加わった際にロックリング３は変位がし難く、従来よりも高いチューブ保持力を得ることができるという利点がある。   Further, since the lock ring 3 is closely attached and fixed to the back ring 4 that is rotatably mounted in the joint body 1, the collar 22 (see FIG. 5) and the back ring 23 (see FIG. 5), the lock ring 3 is less likely to be displaced when a force is applied compared to the structure simply disposed, and there is an advantage that a tube holding force higher than that of the conventional structure can be obtained.

さらに、前記バックリング４に対しロックリング３はチューブＴの挿入方向に密着・固定されたこととしており、ロックリング３はバックリング４の壁面にチューブＴの挿入方向に押付けられているが、チューブＴに引張り力が作用するとロックリング３の爪２(内端)が抜け方向に変位しようとする一方、これに対応しロックリング３の外端はロックリング３とリリース７との接点10を中心として回動して変位しようとするものの、ロックリング３の外端はバックリング４の壁面に押付けられていて回動が妨げられている。したがって、ロックリング３の反転は困難でありその内径は拡大し難いという利点がある。   Further, the lock ring 3 is closely attached and fixed to the back ring 4 in the insertion direction of the tube T, and the lock ring 3 is pressed against the wall surface of the back ring 4 in the insertion direction of the tube T. When a tensile force is applied to T, the claw 2 (inner end) of the lock ring 3 tends to be displaced in the pulling direction. However, the outer end of the lock ring 3 is pressed against the wall surface of the back ring 4 to prevent the rotation. Therefore, there is an advantage that the inversion of the lock ring 3 is difficult and its inner diameter is difficult to expand.

その上、前記バックリング４に対してチューブＴの挿入口側にキャップ６を配設し、前記キャップ６は継手本体１に固定したこととしており、従来よりも少ない部品点数(カラーの分が減少)でチューブＴの回転機構を実現することができるという利点がある。   In addition, a cap 6 is disposed on the tube T insertion port side with respect to the buckling 4 and the cap 6 is fixed to the joint body 1. ) Has an advantage that the rotation mechanism of the tube T can be realized.

チューブは回転可能であると共に従来よりも高いチューブ保持力を得ることができ、種々の管継手の用途に適用することができる。   The tube is rotatable and can obtain a higher tube holding force than before, and can be applied to various pipe joint applications.

この発明の管継手の実施形態を説明する半断面図。The half sectional view explaining the embodiment of the pipe joint of this invention. 図１の管継手の要部拡大図。The principal part enlarged view of the pipe joint of FIG. 図１の管継手のロックリングを説明する平面図。The top view explaining the lock ring of the pipe joint of FIG. 図３のロックリングのＡ−Ａ線の矢視図。The arrow view of the AA line of the lock ring of FIG. 従来の管継手を説明する半断面図。The half sectional view explaining the conventional pipe joint.

符号の説明Explanation of symbols

１ 継手本体
２ 爪
３ ロックリング
４ バックリング
６ キャップ
Ｔ チューブ 1 Joint body 2 Claw 3 Lock ring 4 Buck ring 6 Cap T-tube

Claims (3)

チューブＴを保持する爪２を有するロックリング３を具備し、継手本体１に回転可能に内装されるバックリング４に対し前記ロックリング３は密着・固定されたことを特徴とする管継手。 A pipe joint comprising a lock ring 3 having a claw 2 for holding a tube T, wherein the lock ring 3 is closely attached and fixed to a back ring 4 rotatably mounted in the joint body 1. 前記バックリング４に対しロックリング３はチューブＴの挿入方向に密着・固定された請求項１記載の管継手。 The pipe joint according to claim 1, wherein the lock ring (3) is closely attached and fixed to the back ring (4) in the insertion direction of the tube (T). 前記バックリング４に対してチューブＴの挿入口側にキャップ６を配設し、前記キャップ６は継手本体１に固定した請求項１又は２記載の管継手。 The pipe joint according to claim 1, wherein a cap 6 is disposed on the tube T insertion port side with respect to the buckling 4, and the cap 6 is fixed to the joint body 1.
JP2004221996A 2004-07-29 2004-07-29 Pipe fitting Active JP4700938B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2004221996A JP4700938B2 (en) 2004-07-29 2004-07-29 Pipe fitting
KR1020040075855A KR101108348B1 (en) 2004-07-29 2004-09-22 Pipe joint
CNB2004101000325A CN100478600C (en) 2004-07-29 2004-11-30 Union joint

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004221996A JP4700938B2 (en) 2004-07-29 2004-07-29 Pipe fitting

Publications (2)

Publication Number Publication Date
JP2006038169A true JP2006038169A (en) 2006-02-09
JP4700938B2 JP4700938B2 (en) 2011-06-15

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Application Number Title Priority Date Filing Date
JP2004221996A Active JP4700938B2 (en) 2004-07-29 2004-07-29 Pipe fitting

Country Status (3)

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JP (1) JP4700938B2 (en)
KR (1) KR101108348B1 (en)
CN (1) CN100478600C (en)

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JP2016089884A (en) * 2014-10-31 2016-05-23 ニッタ株式会社 Connecting mechanism of valve and joint in air piping
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CN100478600C (en) 2009-04-15
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JP4700938B2 (en) 2011-06-15
KR20060011765A (en) 2006-02-03

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