JP4219179B2 - Pipe fittings and pipe fitting lock rings - Google Patents

Pipe fittings and pipe fitting lock rings Download PDF

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Publication number
JP4219179B2
JP4219179B2 JP2003019594A JP2003019594A JP4219179B2 JP 4219179 B2 JP4219179 B2 JP 4219179B2 JP 2003019594 A JP2003019594 A JP 2003019594A JP 2003019594 A JP2003019594 A JP 2003019594A JP 4219179 B2 JP4219179 B2 JP 4219179B2
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JP
Japan
Prior art keywords
lock ring
circumferential groove
insertion port
pipe joint
protrusion
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
Application number
JP2003019594A
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Japanese (ja)
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JP2004232679A5 (en
JP2004232679A (en
Inventor
敏雄 戸島
毅史 原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kubota Corp
Original Assignee
Kubota Corp
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Filing date
Publication date
Priority to JP2003019594A priority Critical patent/JP4219179B2/en
Application filed by Kubota Corp filed Critical Kubota Corp
Priority to US10/539,744 priority patent/US7243954B2/en
Priority to DE60335027T priority patent/DE60335027D1/en
Priority to PCT/JP2003/016499 priority patent/WO2004061354A1/en
Priority to KR1020057012649A priority patent/KR101064549B1/en
Priority to EP03781016A priority patent/EP1584854B1/en
Priority to AU2003289506A priority patent/AU2003289506A1/en
Priority to TW092136983A priority patent/TWI295717B/en
Publication of JP2004232679A publication Critical patent/JP2004232679A/en
Publication of JP2004232679A5 publication Critical patent/JP2004232679A5/ja
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Publication of JP4219179B2 publication Critical patent/JP4219179B2/en
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Description

【０００１】
【発明の属する技術分野】
この発明は、管継手および管継手のロックリングに関する。
【０００２】
【従来の技術】
従来、ダクタイル鋳鉄管等の管継手で抜け出し防止機能を有する構造として、図６に示すように、受口１内面の周方向溝２にロックリング３を配置し、一方挿し口４に挿し口突部４ａを設け、この挿し口突部４ａを前記ロックリング３に係合させることにより挿し口４の脱け出しを防止する管継手が知られている。
【０００３】
ところで、上記管接続時で受口１に挿し口４を挿入する際、ロックリング３が邪魔にならないよう、従来では図７に示すように拡径具６を受口１の開口側から受口内面に沿わせて挿入し、先端６ａをロックリング３の割り部に介挿してロックリング３の径ｒを拡大し、ロックリング３を受口１の周方向溝２内に収め、挿し口突部４ａを通過させるようにすることが行われる。なお、図中７はシール用ゴム輪、８は押輪、９は締結ボルトを示す。
【０００４】
ロックリング３の抜け出し防止機能は、図６に示したように、挿し口４が受口１から抜け出ようとするとき、挿し口突部４ａがロックリング３に係合し、一方ロックリング３は周方向溝２の内面に係合することによって抜け出し防止を図るようにしたもので、この抜け出し防止時にロックリング３が挿し口４の外面を締めつけて挿し口突部４ａと確実に係合するよう周方向溝２の開口側側面２ａならびにこの面に接するロックリング側面３ａをテーパ面とすることが考えられている。
【０００５】
なお、このように周方向溝２の開口側側面２ａならびにこの面に接するロックリング側面３ａをテーパ面とした構造の管継手は、既存の規格に無いため文献が提示できない。
【０００６】
【発明が解決しようとする課題】
しかしながら、管接続作業に先立ち、図６に示したようにロックリング３を正しい向きに収納した場合は問題は無いが、図８に示すように逆向配置として挿入した場合、相互の断面形状の関係で、図８に示したようにロックリング３が周方向溝２に入り込んでしまう場合があり、このような逆関係に挿入されてしまった場合はテーパ面の係合による縮径機能が十分に働かず、抜け出し防止機能が発揮されない恐れがある。
【０００７】
しかも、受口１内に挿し口４を挿入してしまった後では、ロックリング３の向きを正しい方向に設置したか否かは確認のしようが無く、抜け出し防止機能が発揮されない事態に至って初めて誤配置に気付くことになりかねないといった問題がある。
【０００８】
この発明は、上記した問題を解消し、従来と同じ形態のロックリングでありながら、管継手を接合する場合に、ロックリングを逆向きに設置することを確実に防止することを課題としてなされたものである。
【０００９】
【課題を解決するための手段】
上記課題を解決するため、本発明の管継手は、受口内面に、周方向溝が形成され、該周方向溝内にロックリングを収納し、挿し口突部を有する挿し口を、前記ロックリングを拡径させた上で前記受口内に挿入接続するようにした管継手において、前記周方向溝内側面とロックリング側面の片側のみにテーパ面が設けられ、該テーパ面同士を対面させた場合以外は、前記周方向溝のテーパ面と前記ロックリングのテーパ面以外の外周とが接触して前記周方向溝の奥方までの前記ロックリングの収納が不能とされ、これによって周方向溝からはみ出たロックリングに挿し口突部が係り合って前記挿し口が受口内に挿入不能となるようにされたことを特徴とするものである。
本発明の管継手のロックリングは、前記管継手が、受口内面に、周方向溝が形成され、該周方向溝内に前記ロックリングを収納し、挿し口突部を有する挿し口を、前記ロックリングを拡径させた上で前記受口内に挿入接続するようにしたものであり、前記周方向溝内側面とロックリング側面の片側のみにテーパ面が設けられ、前記ロックリングは、このロックリングの内面の軸方向幅をｔ、その外面の軸方向幅をｔ ０ 、その高さをＨ、周方向溝の奥面の軸方向幅をＴ ０ 、テーパ面の傾斜角をθ、周方向溝の深さをＶ、挿し口突部の高さをｈ、受口内面と挿し口外面の隙間をＳとして、
Ｓ＋Ｖ＞Ｈ＋ｈ
Ｈ＞Ｓ
ｔ ０ ＜Ｔ ０
ｔ＞Ｔ ０
（Ｓ＋Ｖ）−（ｔ−Ｔ ０ ）ｔａｎθ−Ｈ＜ｈ
の関係を有するものであることを特徴とする。
【００１０】
上記発明によれば、受口内面の周方向溝内にロックリングをテーパ面が対面しない逆向き姿勢で挿入すると、ロックリングが周方向溝内に入りきれなくなり、その結果、周方向溝からはみ出たロックリングに挿し口突部が引っかかって挿し口が挿入できなくなり、ロックリングが正しい向きにされずに挿し口が挿入されるといった誤接続が確実に防止されるのである。
【００１１】
【発明の実施の形態】
次に、この発明の実施の形態を説明する。
図１は管継手の断面図である。なお、従来と同じ部分は同一符号を付すだけで説明は省略する。
【００１２】
図１において、管継手１０は、受口１の内面に、受口開口側の側面２ａがテーパ面とされた周方向溝２が形成され、この周方向溝２内に、受口開口側側面だけがテーパ状３ａとされたロックリング３を収納し、端部に突部４ａを形成した挿し口４が挿入接続されている。
【００１３】
上記において、ロックリング３とこれを収納するための周方向溝２の断面形状の相関は、テーパ面２ａ、３ａ同士を対面させた場合は、図２に示すように周方向溝２の奥方までロックリング３が収納され、その結果挿し口突部４ａが通過できるが、逆方向に設置した場合は、図３に示すように周方向溝２のテーパ面２ａと前記ロックリング外周３ｃとが接触して、周方向溝２の奥方までロックリング３の拡径収納が不能とされ、このために周方向溝からはみ出たロックリング３に挿し口突部４ａが引っかかり、挿し口４を受口１内に挿入不能となるようにされている。
【００１４】
具体的には、図２に示すように、ロックリング３の内面３ｂの軸方向幅をｔ、外面３ｃの軸方向幅をｔ０、ロックリング３の高さをＨ、周方向溝２の開口幅をＴ、周方向溝の奥面の軸方向幅をＴ０、テーパ面の傾斜角をθ、周方向溝の深さをＶ、挿し口突部４ａの高さをｈ、受口１内面と挿し口４外面の隙間をＳとすると、図２を参照して
テーパ面同士を対面させて周方向溝２内にロックリング３を収納すれば挿口突部４ａが通過可能とされているので
Ｓ+Ｖ＞Ｈ+ｈ … （１）
また、挿し口４が抜け出ようとしたときにロックリング３と挿し口突部４ａとが引っかかるので、
Ｈ＞Ｓ … （２）
また、拡径すれば周方向溝２内にロックリング３が収納されてしまうので
ｔ０＜Ｔ０ … （３）
一方、ロックリング３を反対向きに設置すると、拡径してもロックリング３は周方向溝２のテーパ面２ａと接触して奥方まで入りきれず、挿し口突部を通過させないので、図３を参照して
ｔ＞Ｔ０ … （４）
この時のロックリング外周面と周方向溝２の内面との隙間をｙとすると
ｙ＝（ｔ−Ｔ０）tanθ … （５）
ロックリング３が挿口突部４ａに引っかかって挿し口４の挿入を妨げるので
(Ｓ+Ｖ)−(ｙ＋Ｈ)＜ｈ
即ち
(Ｓ+Ｖ)−(ｔ−Ｔ０)tanθ−Ｈ＜ｈ … （６）
の上記(１)〜(６)の関係がある。
【００１５】
従って、このロックリング３を周方向溝２に挿入する場合、正しい方向に設置した場合は、図１に示すように拡径具６によってロックリング３は拡径されて周方向溝２内に正しく収納されて、挿口突部４ａが図示のように収納溝２より受口１の奥方へと確実に入り込むことができるが、逆向きに設置した場合、図３に示すように、テーパ面３ａと周方向溝２の内壁２ｃの角２ｄ及び、周方向溝２のテーパ面２ａとロックリング３の端面の角３ｃとが接触してロックリング３が周方向溝内に入り込むことが出来ず、この結果、挿し口突部４ａが通過出来ず、挿し口の挿入が出来なくなるのである。
【００１６】
これにより誤接続が確実に防止できるのである。
なお、管の寸法公差上、上記のような構成としても、逆向き配置のロックリングが溝内に入り込んでしまう場合が考えられる。このような寸法関係がある場合は、図４に示すように、少なくともロックリング内底面３ｂに対し直交する側面３ｄの径方向厚さをＨ１で示すように大きくすれば、逆向きに挿入したときに挿口突部４ａをより確実に通過させないようにすることができる。
【００１７】
なお、このロックリング３の高さＨ１は、図示のように側面部分だけの厚さであっても良く、ロックリング３の外面３ｄが傾斜面となる断面形状とされていても良い。
【００１８】
この場合は、図５に示すように、高さＨ１によりロックリング３の角３ｃが受口１内面の周方向溝２のテーパ面２ａに引っ掛かると共に、周方向溝２の内壁２ｃの角２ｄもロックリング３のテーパ面３ａに引っ掛かるので逆向き挿入による挿し口４の誤接続が確実に防止される。
【００１９】
【発明の効果】
この発明は以上説明したように、ロックリングを受口内の周方向溝に収納して挿し口を挿入する際、ロックリングを逆向きに設置した場合は、周方向溝内にロックリングが完全に入り込まず、そのためにはみ出たロックリングに突部が引っかかって、挿し口を受口内に完全に挿入することが出来なくなり、これによってロックリングの誤配置のままに受口内に挿し口を挿入してしまうことが防止できるのである。
【００２０】
また、この発明におけるロックリングは、形状も単純であるので製造も容易であり安価に提供できるなどの効果を有する。
【図面の簡単な説明】
【図１】この発明の管継手の要部断面図である。
【図２】この発明の管継手の要部拡大断面図である。
【図３】この発明の管継手の作用説明断面図である。
【図４】この発明の管継手の抜け出し防止構造の他の構成例の断面図を示す。
【図５】この発明の他の構成例における管継手の作用説明断面図である。
【図６】従来例の抜け出し防止管継手の断面図である。
【図７】拡径具を用いてロックリングを拡径した状態を示す正面図である。
【図８】従来の脱け出し防止管継手の作動を示す要部断面図である。
【符号の説明】
１ 受口
２ 周方向溝
２ａ 周方向溝側面
３ ロックリング
３ａ テーパ面
４ 挿し口
４ａ 挿し口突部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pipe joint and a lock ring for the pipe joint .
[0002]
[Prior art]
Conventionally, as shown in FIG. 6, a lock ring 3 is disposed in the circumferential groove 2 on the inner surface of the receiving port 1 and the insertion port 4 is inserted into the insertion port 4, as shown in FIG. There is known a pipe joint that is provided with a portion 4a and prevents the insertion port 4 from coming out by engaging the insertion port protrusion 4a with the lock ring 3.
[0003]
By the way, in order to prevent the lock ring 3 from interfering when the insertion port 4 is inserted into the reception port 1 when the pipe is connected, conventionally, the diameter expanding tool 6 is received from the opening side of the reception port 1 as shown in FIG. Insert along the inner surface, insert the tip 6a into the split portion of the lock ring 3 to enlarge the diameter r of the lock ring 3, and place the lock ring 3 in the circumferential groove 2 of the receiving port 1 The part 4a is allowed to pass through. In the figure, 7 is a rubber ring for sealing, 8 is a push wheel, and 9 is a fastening bolt.
[0004]
As shown in FIG. 6, when the insertion port 4 is about to come out of the receiving port 1, the lock ring 3 is prevented from coming out, and the insertion port protrusion 4 a engages with the lock ring 3. By engaging with the inner surface of the circumferential groove 2, it is intended to prevent slipping out, and when this slipping is prevented, the lock ring 3 tightens the outer surface of the insertion port 4 so as to be surely engaged with the insertion port protrusion 4 a. It is considered that the opening side surface 2a of the circumferential groove 2 and the lock ring side surface 3a in contact with this surface are tapered surfaces.
[0005]
In addition, since there is no existing standard for a pipe joint having a structure in which the opening side surface 2a of the circumferential groove 2 and the lock ring side surface 3a in contact with this surface are tapered surfaces, literature cannot be presented.
[0006]
[Problems to be solved by the invention]
However, there is no problem when the lock ring 3 is stored in the correct orientation as shown in FIG. 6 prior to the pipe connection work, but when inserted in the reverse orientation as shown in FIG. Thus, as shown in FIG. 8, the lock ring 3 may enter the circumferential groove 2, and if it is inserted in such a reverse relationship, the diameter reducing function by the engagement of the taper surface is sufficient. There is a risk that it will not work and the function of preventing the removal will not be demonstrated.
[0007]
In addition, after inserting the insertion port 4 into the receiving port 1, there is no way to confirm whether or not the lock ring 3 has been installed in the correct direction, and this is the first time that the function of preventing the removal is not exhibited. There is a problem that a misplacement may be noticed.
[0008]
An object of the present invention is to solve the above-mentioned problems and reliably prevent the lock ring from being installed in the reverse direction when joining pipe joints while being a lock ring of the same form as the conventional one. Is.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the pipe joint of the present invention has a circumferential groove formed on the inner surface of the receiving port, a lock ring is accommodated in the circumferential groove, and the insertion port having an insertion port protrusion is provided with the lock. In a pipe joint that is inserted and connected into the receiving port after expanding the ring diameter, a tapered surface is provided only on one side of the circumferential groove inner surface and the lock ring side surface, and the tapered surfaces face each other. In other cases, the taper surface of the circumferential groove and the outer periphery of the lock ring other than the taper surface come into contact with each other, and the lock ring cannot be stored to the back of the circumferential groove. The insertion port protrusion is engaged with the protruding lock ring so that the insertion port cannot be inserted into the receiving port.
In the lock ring of the pipe joint of the present invention, the pipe joint is formed with a circumferential groove on the inner surface of the receiving port, the lock ring is accommodated in the circumferential groove, and an insertion port having an insertion port protrusion is provided. The lock ring is expanded and inserted into the receiving port, and a tapered surface is provided only on one side of the circumferential groove inner surface and the lock ring side surface. The axial width of the inner surface of the lock ring is t, the axial width of the outer surface is t 0 , its height is H, the axial width of the inner surface of the circumferential groove is T 0 , the inclination angle of the taper surface is θ, The depth of the directional groove is V, the height of the insertion port protrusion is h, and the clearance between the inner surface of the receiving port and the outer surface of the insertion port is S,
S + V> H + h
H> S
t 0 <T 0
t> T 0
(S + V) − (t−T 0 ) tan θ−H <h
It has the following relationship.
[0010]
According to the above invention, when the lock ring is inserted into the circumferential groove on the inner surface of the receiving port in a reverse orientation in which the tapered surface does not face, the lock ring cannot enter the circumferential groove, and as a result, protrudes from the circumferential groove. Therefore, it is possible to reliably prevent an erroneous connection such that the insertion port protrusion is caught by the lock ring and the insertion port cannot be inserted, and the insertion port is inserted without the lock ring being oriented correctly.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described.
FIG. 1 is a cross-sectional view of a pipe joint. In addition, the same part as the past is attached | subjected the same code | symbol, and description is abbreviate | omitted.
[0012]
In FIG. 1, a pipe joint 10 is formed with a circumferential groove 2 in which a side surface 2 a on the opening side of the receiving port is a tapered surface on the inner surface of the receiving port 1. Only the lock ring 3 having the tapered shape 3a is accommodated, and the insertion port 4 having a protrusion 4a formed at the end is inserted and connected.
[0013]
In the above description, the correlation between the cross-sectional shapes of the lock ring 3 and the circumferential groove 2 for housing the lock ring 3 is as far as the back of the circumferential groove 2 as shown in FIG. 2 when the tapered surfaces 2a and 3a are opposed to each other. The lock ring 3 is accommodated so that the insertion port protrusion 4a can pass through. However, when installed in the opposite direction, the tapered surface 2a of the circumferential groove 2 and the lock ring outer periphery 3c come into contact with each other as shown in FIG. Thus, the lock ring 3 cannot be expanded to the back of the circumferential groove 2, and for this reason, the insertion port protrusion 4 a is caught by the lock ring 3 protruding from the circumferential groove, and the insertion port 4 is received by the receiving port 1. It is designed so that it cannot be inserted inside.
[0014]
Specifically, as shown in FIG. 2, the axial width of the inner surface 3 b of the lock ring 3 is t, the axial width of the outer surface 3 c is t 0 , the height of the lock ring 3 is H, and the circumferential groove 2 is opened. The width is T, the axial width of the inner surface of the circumferential groove is T 0 , the inclination angle of the tapered surface is θ, the depth of the circumferential groove is V, the height of the insertion port protrusion 4a is h, the inner surface of the receiving port 1 If the clearance of the outer surface of the insertion opening 4 is S, the insertion protrusion 4a can be passed if the taper surfaces face each other and the lock ring 3 is housed in the circumferential groove 2 with reference to FIG. So S + V> H + h (1)
Further, when the insertion port 4 is about to come out, the lock ring 3 and the insertion port protrusion 4a are caught.
H> S (2)
Further, since the lock ring 3 is accommodated in the circumferential groove 2 if the diameter is increased, t 0 <T 0 (3)
On the other hand, if the lock ring 3 is installed in the opposite direction, even if the diameter is increased, the lock ring 3 contacts the tapered surface 2a of the circumferential groove 2 so that it cannot enter all the way back, and the insertion port protrusion does not pass through. T> T 0 (4)
If the clearance between the outer peripheral surface of the lock ring and the inner surface of the circumferential groove 2 is y, y = (t−T 0 ) tan θ (5)
Since the lock ring 3 is caught on the insertion projection 4a and prevents the insertion port 4 from being inserted.
(S + V)-(y + H) <h
That is
(S + V) − (t−T 0 ) tan θ−H <h (6)
(1) to (6) above.
[0015]
Accordingly, when the lock ring 3 is inserted into the circumferential groove 2, when the lock ring 3 is installed in the correct direction, the lock ring 3 is expanded in diameter by the diameter expanding tool 6 as shown in FIG. As shown in FIG. 3, the insertion projection 4a can be surely inserted into the interior of the receiving port 1 from the storage groove 2 as shown in the figure. However, when installed in the reverse direction, as shown in FIG. And the corner 2d of the inner wall 2c of the circumferential groove 2 and the tapered surface 2a of the circumferential groove 2 and the corner 3c of the end face of the lock ring 3 contact each other, so that the lock ring 3 cannot enter the circumferential groove. As a result, the insertion port protrusion 4a cannot pass, and the insertion port cannot be inserted.
[0016]
As a result, erroneous connection can be reliably prevented.
In addition, due to the dimensional tolerance of the tube, even if the above-described configuration is used, there may be a case where the lock ring arranged in the reverse direction enters the groove. When there is such a dimensional relationship, as shown in FIG. 4, at least the radial thickness of the side surface 3 d orthogonal to the lock ring inner bottom surface 3 b is increased as indicated by H 1 , so that it is inserted in the opposite direction. Sometimes it is possible to prevent the insertion projection 4a from passing through more reliably.
[0017]
The height H 1 of the locking ring 3 may be the only thickness of the side portions as shown, the outer surface 3d of the lock ring 3 may be the cross-sectional shape which is inclined.
[0018]
In this case, as shown in FIG. 5, with the square 3c of the lock ring 3 by the height H 1 is caught by the tapered surface 2a of the receptacle 1 the inner surface of the circumferential groove 2, the corners 2d of the circumferential grooves 2 of the inner wall 2c In addition, since the hook is caught on the tapered surface 3a of the lock ring 3, erroneous connection of the insertion opening 4 due to reverse insertion is reliably prevented.
[0019]
【The invention's effect】
As described above, when the lock ring is housed in the circumferential groove in the receiving port and the insertion port is inserted, when the lock ring is installed in the reverse direction, the lock ring is completely in the circumferential groove. For this reason, the protruding part is caught by the protruding lock ring, so that the insertion port cannot be completely inserted into the receiving port, so that the insertion port can be inserted into the receiving port while the lock ring is misplaced. It can be prevented.
[0020]
In addition, the lock ring according to the present invention is simple in shape, so that it is easy to manufacture and can be provided at a low cost.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a main part of a pipe joint according to the present invention.
FIG. 2 is an enlarged cross-sectional view of a main part of the pipe joint of the present invention.
FIG. 3 is a sectional view for explaining the operation of the pipe joint of the present invention.
FIG. 4 is a cross-sectional view of another configuration example of the pipe joint withdrawal prevention structure according to the present invention.
FIG. 5 is a sectional view for explaining the operation of a pipe joint according to another configuration example of the present invention.
FIG. 6 is a cross-sectional view of a conventional fitting prevention pipe joint.
FIG. 7 is a front view showing a state in which the diameter of the lock ring is expanded using a diameter expanding tool.
FIG. 8 is a cross-sectional view of a main part showing the operation of a conventional escape prevention pipe joint.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Receptacle 2 Circumferential groove 2a Circumferential groove side surface 3 Lock ring 3a Tapered surface 4 Insertion opening 4a Insertion protrusion

Claims (2)

受口内面に、周方向溝が形成され、該周方向溝内にロックリングを収納し、挿し口突部を有する挿し口を、前記ロックリングを拡径させた上で前記受口内に挿入接続するようにした管継手において、前記周方向溝内側面とロックリング側面の片側のみにテーパ面が設けられ、該テーパ面同士を対面させた場合以外は、前記周方向溝のテーパ面と前記ロックリングのテーパ面以外の外周とが接触して前記周方向溝の奥方までの前記ロックリングの収納が不能とされ、これによって周方向溝からはみ出たロックリングに挿し口突部が係り合って前記挿し口が受口内に挿入不能となるようにされたことを特徴とする管継手。  A circumferential groove is formed on the inner surface of the receiving port, a lock ring is accommodated in the circumferential groove, and an insertion port having an insertion port protrusion is inserted and connected into the receiving port after the diameter of the lock ring is expanded. In the pipe joint, the tapered surface of the circumferential groove and the lock are provided except that a tapered surface is provided only on one side of the circumferential groove inner surface and the lock ring side surface, and the tapered surfaces face each other. Contact with the outer periphery other than the taper surface of the ring makes it impossible to store the lock ring up to the depth of the circumferential groove, and this causes the insertion protrusion to engage with the lock ring protruding from the circumferential groove. A pipe joint characterized in that the insertion slot is made uninsertable into the receiving slot. 管継手のロックリングであって、前記管継手は、受口内面に、周方向溝が形成され、該周方向溝内に前記ロックリングを収納し、挿し口突部を有する挿し口を、前記ロックリングを拡径させた上で前記受口内に挿入接続するようにしたものであり、前記周方向溝内側面とロックリング側面の片側のみにテーパ面が設けられており、前記ロックリングは、このロックリングの内面の軸方向幅をｔ、その外面の軸方向幅をｔA lock ring of a pipe joint, wherein the pipe joint is formed with a circumferential groove on the inner surface of the opening, the lock ring is accommodated in the circumferential groove, and the insertion opening having an insertion opening protrusion The lock ring is expanded and then inserted and connected into the receptacle, and a tapered surface is provided only on one side of the circumferential groove inner side surface and the lock ring side surface. The axial width of the inner surface of the lock ring is t, and the axial width of the outer surface is t. ０0 、その高さをＨ、周方向溝の奥面の軸方向幅をＴ, Its height is H, and the axial width of the inner surface of the circumferential groove is T ０0 、テーパ面の傾斜角をθ、周方向溝の深さをＶ、挿し口突部の高さをｈ、受口内面と挿し口外面の隙間をＳとして、, The inclination angle of the taper surface is θ, the depth of the circumferential groove is V, the height of the insertion port protrusion is h, the clearance between the inner surface of the receiving port and the outer surface of the insertion port is S,
Ｓ＋Ｖ＞Ｈ＋ｈS + V> H + h
Ｈ＞ＳH> S
ｔt ０0 ＜Ｔ<T ０0
ｔ＞Ｔt> T ０0
（Ｓ＋Ｖ）−（ｔ−Ｔ(S + V)-(t-T ０0 ）ｔａｎθ−Ｈ＜ｈ) Tan θ−H <h
の関係を有するものであることを特徴とする管継手のロックリング。A lock ring for a pipe joint, characterized by having the following relationship:
JP2003019594A 2003-01-07 2003-01-29 Pipe fittings and pipe fitting lock rings Expired - Lifetime JP4219179B2 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
JP2003019594A JP4219179B2 (en) 2003-01-29 2003-01-29 Pipe fittings and pipe fitting lock rings
DE60335027T DE60335027D1 (en) 2003-01-07 2003-12-22 TUBE CONNECTION WITH EARTHQUAKE SAFETY FUNCTION
PCT/JP2003/016499 WO2004061354A1 (en) 2003-01-07 2003-12-22 Pipe joint with earthquake-proof function
KR1020057012649A KR101064549B1 (en) 2003-01-07 2003-12-22 Pipe joint with earthquake?proof function
US10/539,744 US7243954B2 (en) 2003-01-07 2003-12-22 Pipe joint with earthquake-proof function
EP03781016A EP1584854B1 (en) 2003-01-07 2003-12-22 Pipe joint with earthquake-proof function
AU2003289506A AU2003289506A1 (en) 2003-01-07 2003-12-22 Pipe joint with earthquake-proof function
TW092136983A TWI295717B (en) 2003-01-07 2003-12-26 Pipe joint with vibration resistance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003019594A JP4219179B2 (en) 2003-01-29 2003-01-29 Pipe fittings and pipe fitting lock rings

Publications (3)

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JP2004232679A JP2004232679A (en) 2004-08-19
JP2004232679A5 JP2004232679A5 (en) 2007-07-05
JP4219179B2 true JP4219179B2 (en) 2009-02-04

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005140138A (en) * 2003-11-04 2005-06-02 Kubota Corp Pipe joint structure
JP5870158B2 (en) 2014-06-13 2016-02-24 株式会社クボタ Pipe structure and program for pipe structure
JP6735123B2 (en) * 2016-03-28 2020-08-05 株式会社クボタ Pipe joint and pipe joining method
WO2017169531A1 (en) * 2016-03-28 2017-10-05 株式会社クボタ Pipe joint, separation prevention member, and pipe joining method
JP6735124B2 (en) * 2016-03-28 2020-08-05 株式会社クボタ Pipe fitting and separation prevention member

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