JP5455382B2 - Pipe fittings and seals - Google Patents

Pipe fittings and seals Download PDF

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Publication number
JP5455382B2
JP5455382B2 JP2009014836A JP2009014836A JP5455382B2 JP 5455382 B2 JP5455382 B2 JP 5455382B2 JP 2009014836 A JP2009014836 A JP 2009014836A JP 2009014836 A JP2009014836 A JP 2009014836A JP 5455382 B2 JP5455382 B2 JP 5455382B2
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valve
receiving port
pipe
peripheral surface
port
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JP2010174906A (en
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正蔵 岸
貴司 横溝
昌功 井谷
崇哲 香川
幸平 池田
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Kubota Corp
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Kubota Corp
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Priority to JP2009014836A priority Critical patent/JP5455382B2/en
Application filed by Kubota Corp filed Critical Kubota Corp
Priority to CN201410161002.9A priority patent/CN103925432B/en
Priority to PCT/JP2010/050755 priority patent/WO2010087275A1/en
Priority to CN201080005536.2A priority patent/CN102301172B/en
Priority to CN201310088677.0A priority patent/CN103133793B/en
Priority to EP10735744.4A priority patent/EP2392845B1/en
Priority to CN201310089167.5A priority patent/CN103148293B/en
Priority to KR1020137025902A priority patent/KR101585909B1/en
Priority to US13/146,256 priority patent/US8573654B2/en
Priority to KR1020137025901A priority patent/KR101514689B1/en
Priority to CN201310089272.9A priority patent/CN103174889B/en
Priority to KR1020117016070A priority patent/KR101488752B1/en
Priority to CN201410165455.9A priority patent/CN104075050B/en
Priority to TW099102264A priority patent/TWI487862B/en
Priority to TW103130994A priority patent/TWI542805B/en
Priority to TW103130993A priority patent/TWI530636B/en
Priority to TW103130995A priority patent/TWI542806B/en
Publication of JP2010174906A publication Critical patent/JP2010174906A/en
Priority to US14/022,299 priority patent/US9488300B2/en
Priority to US14/220,433 priority patent/US9719618B2/en
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Publication of JP5455382B2 publication Critical patent/JP5455382B2/en
Priority to US14/974,062 priority patent/US10006572B2/en
Priority to US14/974,118 priority patent/US10520119B2/en
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本発明は、互いに接続される一方の管の端部に形成された受口に、他方の管の端部に形成された挿口を挿入する管継手およびシール材に関する。 The present invention relates to a pipe joint and a sealing material in which an insertion opening formed at an end of the other pipe is inserted into a receiving opening formed at the end of one pipe connected to each other.

従来、この種の管継手としては、図６に示すように、スリップオンタイプの離脱防止管継手１１がある。この管継手１１は、互いに接続される一方の管１２の端部に形成された受口１３に、他方の管１４の端部に形成された挿口１５が挿入されている。   Conventionally, as this type of pipe joint, there is a slip-on type separation preventing pipe joint 11 as shown in FIG. In this pipe joint 11, an insertion opening 15 formed at the end of the other pipe 14 is inserted into a receiving opening 13 formed at the end of one pipe 12 connected to each other.

受口１３の内周には、シール材配置凹部１７と、シール材配置凹部１７よりも奥側に位置するロックリング溝１９とが形成されている。また、シール材配置凹部１７の周面２３には係止溝２４が形成されている。   On the inner periphery of the receiving port 13, a sealing material arrangement recess 17 and a lock ring groove 19 positioned on the back side of the sealing material arrangement recess 17 are formed. Further, a locking groove 24 is formed in the peripheral surface 23 of the sealing material arrangement recess 17.

ロックリング溝１９には、周方向一つ割りのロックリング２０が装着されているとともに、ロックリング２０の外周とロックリング溝１９の底面との間には、ロックリング２０を固定するためのゴム輪などの弾性付勢手段２１が配置されている。また、挿口１５の先端部外周には、ロックリング２０に受口奥側から係合可能な突部２２が形成されている。   The lock ring groove 19 is provided with a circumferentially divided lock ring 20 and a rubber for fixing the lock ring 20 between the outer periphery of the lock ring 20 and the bottom surface of the lock ring groove 19. Elastic urging means 21 such as a ring is disposed. Further, a protrusion 22 that can be engaged with the lock ring 20 from the back of the receiving port is formed on the outer periphery of the distal end of the insertion port 15.

シール材配置凹部１７には、受口１３と挿口１５との間を全周にわたりシールするゴム製で環状のシール材１８が配置されている。図６，図７に示すように、シール材１８は、係止溝２４内に嵌入係合するヒール部２５と、上記周面２３と挿口１５の外周面との間で圧縮されてシール面圧を生ずるバルブ部２６とを備えている。このバルブ部２６は受口奥側ほど内径を小さく形成され、その断面形状が管中心に向けて斜め方向に舌状に突出する略長円形に形成されている。   An annular sealing material 18 made of rubber that seals the space between the receiving port 13 and the insertion port 15 over the entire circumference is arranged in the sealing material arrangement recess 17. As shown in FIGS. 6 and 7, the sealing material 18 is compressed between the heel portion 25 fitted and engaged in the locking groove 24, and the peripheral surface 23 and the outer peripheral surface of the insertion slot 15, thereby sealing the surface. And a valve portion 26 for generating pressure. The valve portion 26 is formed to have a smaller inner diameter toward the back of the receiving port, and its cross-sectional shape is formed in a substantially oval shape protruding in a tongue shape in an oblique direction toward the center of the tube.

以上のような構成によると、受口１３に挿口１５を挿入して接合する時、挿口１５の突部２２がシール材１８の内周を通過する際に、図８に示すように、バルブ部２６の内周部が仮想線で示す状態から実線で示すように管径方向外方に撓むように変形（拡径）する。   According to the configuration as described above, when the insertion port 15 is inserted into the receiving port 13 and joined, when the protrusion 22 of the insertion port 15 passes through the inner periphery of the sealing material 18, as shown in FIG. The inner peripheral portion of the valve portion 26 is deformed (expanded) so as to bend outward in the tube radial direction from the state indicated by the phantom line.

その後、突部２２がシール材１８の内周を通過してしまうと、図６に示すように、バルブ部２６が挿口１５の外周面とシール材配置凹部１７の周面２３との間で圧縮され、バルブ部２６の内周部が挿口１５の外周面に圧接するとともに外周部がシール材配置凹部１７の周面２３（受口１３の内周面）に圧接し、これにより、シール面圧が確保される。   Thereafter, when the protrusion 22 has passed the inner periphery of the sealing material 18, the valve portion 26 is interposed between the outer peripheral surface of the insertion port 15 and the peripheral surface 23 of the sealing material disposing recess 17 as shown in FIG. 6. The inner peripheral portion of the valve portion 26 is pressed against the outer peripheral surface of the insertion port 15 and the outer peripheral portion is pressed against the peripheral surface 23 (the inner peripheral surface of the receiving port 13) of the seal material disposing recess 17. Surface pressure is secured.

尚、上記のような管継手１１に用いられるシール材１８については例えば下記特許文献１に記載されている。   In addition, about the sealing material 18 used for the above pipe joints 11, it describes in the following patent document 1, for example.

特開平５−２３１５７０号公報JP-A-5-231570

しかしながら上記の従来形式では、図８に示すように、受口１３に挿口１５を挿入する時、バルブ部２６の内周部を仮想線で示す状態から実線で示すように管径方向外方に撓むように変形（拡径）させるのに要する力を低減させることは困難であった。このため、挿口１５を受口１３に挿入する際に、大きな挿入力（接合力）を作用させる必要があるといった問題があった。   However, in the above-described conventional format, as shown in FIG. 8, when the insertion port 15 is inserted into the receiving port 13, the inner peripheral portion of the valve portion 26 is outward in the pipe radial direction as indicated by the solid line from the phantom line. It has been difficult to reduce the force required for deformation (expansion) so as to be bent. For this reason, when inserting the insertion port 15 into the receiving port 13, there existed a problem that it was necessary to apply a big insertion force (joining force).

本発明は、挿口を受口に挿入する際に要する挿入力（接合力）を低減することが可能な管継手およびシール材を提供することを目的とする。 An object of this invention is to provide the pipe joint and sealing material which can reduce the insertion force (joining force) required when inserting an insertion port in a receptacle.

上記目的を達成するために、本第１発明は、互いに接続される一方の管の端部に形成された受口に、他方の管の端部に形成された挿口を挿入する管継手であって、
受口の内周面に、嵌め込み溝と、嵌め込み溝よりも奥側に位置する凹部と、凹部よりも奥側に位置するロックリング収容溝とが形成され、
ロックリング収容溝にロックリングが設けられ、
挿口の外周に、ロックリングに受口奥側から係合可能な突部が形成され、
突部は挿口の先端面よりも引き抜き方向へ後退した位置に形成され、
受口と挿口との間は弾性材からなる環状のシール材によって全周にわたりシールされ、
シール材は、嵌め込み溝内に嵌め込まれるヒール部と、受口の内周面と挿口の外周面との間に挟まれるバルブ部とを有し、
バルブ部は互いに接合された第１バルブと第２バルブとを備え、
第１バルブの外周部に、受口の内周面に圧接する第１シール部が形成され、
第２バルブの内周部に、挿口の外周面に圧接する第２シール部が形成され、
第１バルブがヒール部に接合され、
第１バルブと第２バルブとの接合部分にはくびれ部が形成され、
第２バルブは、第１バルブに対して受口の奥側に位置し、且つ、第１バルブから管中心に向って傾斜しており、
ヒール部は、第１バルブに対して、受口の奥側とは反対の手前側に位置し、
第２バルブは、その内径が挿口の外径よりも小さく設定され、且つ、くびれ部の変形により管径方向において拡縮自在であり、
第２バルブの外周と凹部の底面との間に間隙が形成されており、
挿口が受口に挿入される際、先ず、第２バルブが挿口の先端によって挿入方向へ押されながら拡径し、次に、挿口がさらに受口に挿入されると、第１バルブが突部の外周面と受口の内周面との間に挟まれて管径方向において圧縮され、その後、挿口がさらに受口に挿入されて突部が第２バルブの内周に当接すると、第２バルブが突部に対して間隙内を管径方向の外向きに逃げるものである。 In order to achieve the above object, the first invention is a pipe joint in which an insertion opening formed at the end of one pipe is inserted into a receiving opening formed at the end of one pipe connected to each other. There,
On the inner peripheral surface of the receiving port, there are formed a fitting groove, a recess located on the back side of the fitting groove, and a lock ring housing groove located on the back side of the recess,
A lock ring is provided in the lock ring receiving groove,
A protrusion that can be engaged with the lock ring from the back of the receiving port is formed on the outer periphery of the insertion port,
The protrusion is formed at a position retracted in the extraction direction from the front end surface of the insertion opening,
The space between the receiving port and the insertion port is sealed all around by an annular sealing material made of an elastic material,
The sealing material has a heel portion that is fitted into the fitting groove, and a valve portion that is sandwiched between the inner peripheral surface of the receiving port and the outer peripheral surface of the insertion port,
The valve portion includes a first valve and a second valve joined to each other,
A first seal portion that is in pressure contact with the inner peripheral surface of the receiving port is formed on the outer peripheral portion of the first valve,
A second seal portion that is in pressure contact with the outer peripheral surface of the insertion port is formed on the inner peripheral portion of the second valve,
The first valve is joined to the heel,
A constriction is formed at the joint between the first valve and the second valve,
The second valve is located on the back side of the receiving port with respect to the first valve, and is inclined from the first valve toward the pipe center,
The heel portion is located on the front side opposite to the back side of the receiving port with respect to the first valve,
The second valve, the inner diameter is smaller than the outer diameter of the spigot, and, Ri scaled freely der in pipe diameter direction by the deformation of the constricted portion,
A gap is formed between the outer periphery of the second valve and the bottom surface of the recess,
When the insertion port is inserted into the receiving port, first, the second valve is expanded in diameter while being pushed in the insertion direction by the distal end of the insertion port, and then when the insertion port is further inserted into the receiving port, the first valve Is sandwiched between the outer peripheral surface of the projection and the inner peripheral surface of the receiving port and compressed in the pipe radial direction. When in contact, the second valve escapes outward in the radial direction of the pipe with respect to the protrusion .

これによると、一方の管と他方の管とを接合するとき、予め、ロックリングをロックリング収容溝に設け、シール材のヒール部を嵌め込み溝内に嵌め込んでおく。その後、挿口を受口に挿入する。   According to this, when joining one pipe | tube and the other pipe | tube, a lock ring is previously provided in a lock ring accommodation groove | channel, and the heel part of a sealing material is engage | inserted in the insertion groove | channel. Thereafter, the insertion slot is inserted into the receiving slot.

このとき、第２バルブが挿口により管径方向において拡大（拡径）され、挿口がシール材の内周に挿入され、バルブ部の第１シール部が受口の内周面に圧接するとともに第２シール部が挿口の外周面に圧接する。これにより、受口と挿口との間で高い水密性を保持することができる。   At this time, the second valve is expanded (expanded) in the tube diameter direction by the insertion port, the insertion port is inserted into the inner periphery of the sealing material, and the first seal portion of the valve portion is in pressure contact with the inner peripheral surface of the receiving port. At the same time, the second seal portion is in pressure contact with the outer peripheral surface of the insertion slot. Thereby, high watertightness can be maintained between the receiving port and the insertion port.

上記のように挿口を受口に挿入した際、くびれ部が変形することで、第２バルブが管径方向において拡大するため、第２バルブを管径方向において拡大させるのに要する力が低減され、これにより、挿口を受口に挿入する際に要する挿入力（接合力）を低減することができる。
また、挿口の突部が第２バルブの内周を通過する際、間隙が逃げ代となって、第２バルブが、突部に対して、管径方向の外向きに変位して逃げる。これにより、挿口を受口に挿入する際に要する挿入力（接合力）をさらに低減することができる。
また、互いに接合された管内に水圧が作用すると、第２バルブの外周と凹部の底面との間隙にも水圧が作用するため、第２バルブには管中心に向いた押付力が作用し、これにより、第２バルブの第２シール部が挿口の外周面に強く押し付けられ、受口と挿口との間の水密性がさらに向上する。
また、本第２発明は、くびれ部は第１および第２バルブよりも薄いものである。 When the insertion port is inserted into the receiving port as described above, the constricted portion is deformed, so that the second valve expands in the tube radial direction, so that the force required to expand the second valve in the tube radial direction is reduced. Thus, the insertion force (joining force) required for inserting the insertion port into the receiving port can be reduced.
Further, when the protrusion of the insertion port passes through the inner periphery of the second valve, the gap serves as a clearance, and the second valve is displaced outward in the tube radial direction with respect to the protrusion and escapes. Thereby, the insertion force (joining force) required when inserting the insertion port into the receiving port can be further reduced.
In addition, when water pressure acts on the pipes joined to each other, the water pressure also acts on the gap between the outer periphery of the second valve and the bottom surface of the recess, so that a pressing force toward the center of the pipe acts on the second valve. Accordingly, the second seal portion of the second valve is strongly pressed against the outer peripheral surface of the insertion port, and the watertightness between the receiving port and the insertion port is further improved.
In the second invention, the constricted portion is thinner than the first and second valves.

また、本第３発明は、第１シール部は受口の嵌め込み溝と凹部との間に形成された凸部の内周面に圧接し、
第１シール部の位置と第２シール部の位置とが管軸方向にずれているものである。 Further, in the third invention, the first seal portion is in pressure contact with the inner peripheral surface of the convex portion formed between the fitting groove and the concave portion of the receiving port,
The position of the first seal part and the position of the second seal part are shifted in the tube axis direction.

これによると、第１バルブの径を小さくして、受口の凸部の内径を小さくすることができ、これにより、受口の凸部と挿口との隙間が小さくなり、水圧負荷時にシール材に作用する水圧の絶対値が小さくなる。したがって、高水圧負荷時でも、シール材が受口と挿口との隙間から離脱し難くなる。また、受口の端面開口部の内径を従来よりも大きくすることができ、挿口が曲がった状態で受口に接合することができる。   According to this, the diameter of the first valve can be reduced, and the inner diameter of the convex portion of the receiving port can be reduced, thereby reducing the gap between the convex portion of the receiving port and the insertion port, and sealing at the time of hydraulic load. The absolute value of the water pressure acting on the material is reduced. Therefore, it is difficult for the sealing material to be detached from the gap between the receiving port and the insertion port even under a high water pressure load. Moreover, the inner diameter of the end surface opening of the receiving port can be made larger than before, and the insertion port can be joined to the receiving port in a bent state.

また、本第４発明は、第１バルブの管径方向の厚さは第２バルブの管径方向の厚さよりも薄いものである。 In the fourth aspect of the invention, the thickness of the first valve in the pipe radial direction is thinner than the thickness of the second valve in the pipe radial direction .

これによると、挿口の突部が第１バルブの内周を通過する際、第１バルブの厚さは第２バルブの厚さよりも薄いため、第１バルブの管径方向の圧縮量が小さくなり、挿口の突部が第１バルブの内周をスムーズに通過し、挿口を受口に挿入する際に要する挿入力（接合力）をさらに低減することができる。   According to this, when the protrusion of the insertion port passes through the inner periphery of the first valve, the thickness of the first valve is thinner than the thickness of the second valve, so that the compression amount of the first valve in the pipe diameter direction is small. Thus, the insertion projection (joining force) required when the projection of the insertion port passes smoothly through the inner circumference of the first valve and the insertion port is inserted into the receiving port can be further reduced.

また、本第５発明は、上記第１発明から第４発明のいずれか１項に記載の管継手に用いられることを特徴とするシール材である。The fifth invention is a sealing material used for the pipe joint according to any one of the first to fourth inventions.

以上のように本発明によると、挿口を受口に挿入する際に要する挿入力（接合力）を低減することができ、受口と挿口との間で高い水密性を保持することができる。   As described above, according to the present invention, it is possible to reduce the insertion force (bonding force) required when inserting the insertion port into the receiving port, and to maintain high water tightness between the receiving port and the insertion port. it can.

本発明の実施の形態における管継手の断面図である。It is sectional drawing of the pipe joint in embodiment of this invention. 同、管継手に備えられるシール材の自然状態（シール材を管継手から取り外した非圧縮状態）での横断面図である。It is a cross-sectional view in the natural state (non-compressed state in which the sealing material is removed from the pipe joint) of the sealing material provided in the pipe joint. 同、管継手に供えられるシール材の自然状態（シール材を管継手から取り外した非圧縮状態）での各部分の寸法を示した横断面図である。It is the cross-sectional view which showed the dimension of each part in the natural state (The uncompressed state which removed the sealing material from the pipe joint) of the sealing material provided to a pipe joint similarly. 同、管同士を接合する手順を示す断面図である。It is sectional drawing which shows the procedure which joins pipes similarly. 同、管同士を接合する手順を示す断面図である。It is sectional drawing which shows the procedure which joins pipes similarly. 従来の管継手の断面図である。It is sectional drawing of the conventional pipe joint. 同、管継手に備えられるシール材の自然状態（シール材を管継手から取り外した非圧縮状態）での横断面図である。It is a cross-sectional view in the natural state (non-compressed state in which the sealing material is removed from the pipe joint) of the sealing material provided in the pipe joint. 同、管同士を接合する手順を示す断面図である。It is sectional drawing which shows the procedure which joins pipes similarly.

以下、本発明における実施の形態を、図面を参照して説明する。
図１に示すように、３１はプッシュオンタイプの離脱防止管継手であり、互いに接続される一方の管３２の端部に形成された受口３３に、他方の管３４の端部に形成された挿口３５が挿入されている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, reference numeral 31 denotes a push-on type separation preventing pipe joint, which is formed at a receiving port 33 formed at the end of one pipe 32 connected to each other and at an end of the other pipe 34. The insertion slot 35 is inserted.

受口３３の内周面には、嵌め込み溝３７と、嵌め込み溝３７よりも受口奥側に位置する凹部３８と、凹部３８よりも受口奥側に位置するロックリング収容溝３９とがそれぞれ全周にわたり形成されている。嵌め込み溝３７と凹部３８との間には凸部４４が形成されている。また、ロックリング収容溝３９から奥側に距離をおいた受口３３の内部には、管径方向の奥端面４０が形成されている。   On the inner peripheral surface of the receiving port 33, there are a fitting groove 37, a concave portion 38 positioned on the deeper side of the receiving port than the fitting groove 37, and a lock ring receiving groove 39 positioned on the deeper side of the receiving port than the concave portion 38. It is formed all around. A convex portion 44 is formed between the fitting groove 37 and the concave portion 38. Further, a deep end face 40 in the tube radial direction is formed inside the receiving port 33 which is spaced from the lock ring receiving groove 39 to the far side.

ロックリング収容溝３９には金属製の周方向一つ割りのロックリング４１が収容されている。このロックリング４１は、弾性的な縮径力を有することで、挿口３５の外周面に弾性的に抱き付くように構成されている。ロックリング４１の外周面とロックリング収容溝３９の底面との間には心出しゴム体４２が配置されており、挿口３５が受口３３に挿入されていないときにロックリング４１を受口３３に対して心出し状態に保持可能である。また、挿口３５の先端部の外周には、ロックリング４１に受口奥側から係合可能な突部４３が形成されている。尚、突部４３は挿口３５の先端面よりも所定距離だけ引き抜き方向へ後退した位置に形成されている。   The lock ring housing groove 39 houses a metal-made circumferentially divided lock ring 41. The lock ring 41 is configured to elastically hold onto the outer peripheral surface of the insertion opening 35 by having an elastic diameter reducing force. A centering rubber body 42 is disposed between the outer peripheral surface of the lock ring 41 and the bottom surface of the lock ring receiving groove 39, and the lock ring 41 is received when the insertion port 35 is not inserted into the reception port 33. 33 can be held in a centered state. Further, a protrusion 43 that can be engaged with the lock ring 41 from the back of the receiving port is formed on the outer periphery of the distal end of the insertion port 35. The protrusion 43 is formed at a position retracted in the extraction direction by a predetermined distance from the distal end surface of the insertion opening 35.

受口３３と挿口３５との間はゴム（弾性材の一例）製で環状のシール材４５によって全周にわたりシールされている。シール材４５は以下のように構成されている。
図１〜図３に示すように、シール材４５は、嵌め込み溝３７に嵌め込まれるヒール部４６と、受口３３の内周面と挿口３５の外周面との間に挟まれるバルブ部４７とを有している。ヒール部４６は横断面形状（周方向に対して垂直な断面の形状）が方形をした環状の部材である。 The space between the receiving port 33 and the insertion port 35 is made of rubber (an example of an elastic material) and sealed around the entire circumference by an annular sealing material 45. The sealing material 45 is configured as follows.
As shown in FIGS. 1 to 3, the sealing material 45 includes a heel portion 46 fitted into the fitting groove 37, and a valve portion 47 sandwiched between the inner peripheral surface of the receiving port 33 and the outer peripheral surface of the insertion port 35. have. The heel portion 46 is an annular member whose transverse cross-sectional shape (cross-sectional shape perpendicular to the circumferential direction) is square.

バルブ部４７は、環状の部材であり、互いに接合された第１バルブ４８および第２バルブ４９とを備えている。第１バルブ４８の横断面形状は管軸方向に長く且つ両端部に半径ｒ１の半円部を有する長円形状である。また，第２バルブ４９の横断面形状は半径ｒ２の円形状である。尚、上記半径ｒ１は半径ｒ２よりも小さく、第１バルブ４８の厚さＴ１は第２バルブ４９の厚さＴ２よりも薄い。また、第２バルブ４９の横断面の直径（＝２×ｒ２）は凸部４４の内周面と挿口３５の外周面との管径方向の間隔Ｓよりも大きく形成されている。   The valve portion 47 is an annular member, and includes a first valve 48 and a second valve 49 that are joined to each other. The cross-sectional shape of the first valve 48 is an oval shape that is long in the tube axis direction and has semicircular portions with a radius r1 at both ends. The second valve 49 has a circular cross section with a radius r2. The radius r1 is smaller than the radius r2, and the thickness T1 of the first valve 48 is thinner than the thickness T2 of the second valve 49. Further, the diameter (= 2 × r2) of the cross section of the second valve 49 is formed larger than the interval S in the tube diameter direction between the inner peripheral surface of the convex portion 44 and the outer peripheral surface of the insertion port 35.

第１バルブ４８はヒール部４６に接合され、第１バルブ４８とヒール部４６との接合部分の外周部には凹部５２が形成されている。尚、第１バルブ４８の内径は挿口３５の外径よりも僅かに小さく形成され、第１バルブ４８の外径は凸部４４の内径よりも僅かに大きく形成されている。   The first valve 48 is joined to the heel portion 46, and a recess 52 is formed on the outer peripheral portion of the joint portion between the first valve 48 and the heel portion 46. Note that the inner diameter of the first valve 48 is slightly smaller than the outer diameter of the insertion opening 35, and the outer diameter of the first valve 48 is slightly larger than the inner diameter of the convex portion 44.

ヒール部４６は、第１バルブ４８に対して、受口３３の奥側とは反対の手前側に位置している。また、第１バルブ４８と第２バルブ４９との接合部分には、第１および第２バルブ４８，４９よりも薄いくびれ部５３が形成されている。くびれ部５３の内周面と外周面とにはそれぞれ、円弧状の凹部５４，５５が形成されている。   The heel portion 46 is located on the front side opposite to the back side of the receiving port 33 with respect to the first valve 48. Further, a constricted portion 53 that is thinner than the first and second valves 48 and 49 is formed at the joint portion between the first valve 48 and the second valve 49. Arc concavities 54 and 55 are formed on the inner peripheral surface and the outer peripheral surface of the constricted portion 53, respectively.

第２バルブ４９は、第１バルブ４８に対して受口３３の奥側に位置し、且つ、第１バルブ４８から管中心に向って傾斜している。尚、図３に示すように、第１バルブ４８の第２バルブ４９寄りの端部の半円部の中心Ｐ１と第２バルブ４９の中心Ｐ２とを含む面をＬ１とし、上記中心Ｐ１を含み且つシール材４５の径方向の面をＬ２とすると、面Ｌ２に対する面Ｌ１の傾斜角度Ｍは１５〜３５°に設定されている。さらに、第２バルブ４９は、その内径ｄが挿口３５の外径Ｄよりも小さく設定され、且つ、くびれ部５３の弾性変形により管径方向において拡縮自在である。また、ヒール部４６の内径Ｊは第１バルブ４８の内径Ｋよりも大きく設定されている。   The second valve 49 is located on the back side of the receiving port 33 with respect to the first valve 48 and is inclined from the first valve 48 toward the tube center. As shown in FIG. 3, the surface including the center P1 of the semicircular portion of the end portion of the first valve 48 near the second valve 49 and the center P2 of the second valve 49 is L1, and includes the center P1. Further, assuming that the radial surface of the sealing material 45 is L2, the inclination angle M of the surface L1 with respect to the surface L2 is set to 15 to 35 °. Furthermore, the inner diameter d of the second valve 49 is set to be smaller than the outer diameter D of the insertion opening 35, and the second valve 49 can be expanded and contracted in the tube diameter direction by elastic deformation of the constricted portion 53. Further, the inner diameter J of the heel portion 46 is set larger than the inner diameter K of the first valve 48.

第１バルブ４８の外周部には、凸部４４の内周面（受口３３の内周面）に圧接する第１シール部５０が全周にわたり形成されている。また、第２バルブ４９の内周部には、挿口３５の外周面に圧接する第２シール部５１が全周にわたり形成されている。第１シール部５０の位置と第２シール部５１の位置とは管軸方向にずれている。また、図１に示すように、管径方向において、第２バルブ４９の外周と凹部３８の底面との間には間隙５７が全周にわたり形成されている。また、凸部４４の管軸方向の長さは第２バルブ４９を圧縮しない長さに設定されている。尚、ヒール部４６はバルブ部４７よりも硬質のゴムで形成されている。   A first seal portion 50 that is in pressure contact with the inner peripheral surface of the convex portion 44 (the inner peripheral surface of the receiving port 33) is formed on the entire outer periphery of the first valve 48. A second seal portion 51 that is in pressure contact with the outer peripheral surface of the insertion port 35 is formed on the inner peripheral portion of the second valve 49 over the entire periphery. The position of the first seal portion 50 and the position of the second seal portion 51 are shifted in the tube axis direction. Further, as shown in FIG. 1, a gap 57 is formed over the entire circumference between the outer periphery of the second valve 49 and the bottom surface of the recess 38 in the tube diameter direction. The length of the convex portion 44 in the tube axis direction is set to a length that does not compress the second valve 49. The heel portion 46 is formed of rubber that is harder than the valve portion 47.

以下、上記構成における作用を説明する。
一方の管３２と他方の管３４とを接合する場合、先ず、ロックリング収容溝３９にロックリング４１と心出しゴム体４２とを収容し、図４（ａ）に示すように、シール材４５のヒール部４６を嵌め込み溝３７に嵌め込んで、シール材４５を受口３３の内部に装着する。 Hereinafter, the operation of the above configuration will be described.
When joining the one pipe 32 and the other pipe 34, first, the lock ring 41 and the centering rubber body 42 are accommodated in the lock ring accommodating groove 39, and as shown in FIG. The heel portion 46 is fitted into the fitting groove 37, and the sealing material 45 is mounted inside the receiving port 33.

次に、挿口３５を受口３３に挿入する。このとき、図４（ｂ）に示すように、挿口３５の先端は、第１バルブ４８の内周に挿入され、第２バルブ４９に接触して、第２バルブ４９を挿入方向へ押す。これにより、第２バルブ４９が管径方向において拡大（拡径）される。   Next, the insertion opening 35 is inserted into the receiving opening 33. At this time, as shown in FIG. 4B, the distal end of the insertion port 35 is inserted into the inner periphery of the first valve 48, contacts the second valve 49, and pushes the second valve 49 in the insertion direction. As a result, the second valve 49 is expanded (expanded) in the tube diameter direction.

その後、挿口３５がさらに受口３３に挿入されると、図４（ｃ）に示すように、挿口３５の突部４３がヒール部４６の内周を通って第１バルブ４８の内周に当接し、第１バルブ４８が、突部４３の外周面と凸部４４の内周面（受口３３の内周面）との間に挟まれて、管径方向において圧縮される。この際、管径方向において拡大（拡径）した第２バルブ４９の外周と凹部３８の底面との間には間隙５７が全周にわたり形成される。   Thereafter, when the insertion port 35 is further inserted into the receiving port 33, the protrusion 43 of the insertion port 35 passes through the inner periphery of the heel portion 46 as shown in FIG. The first valve 48 is sandwiched between the outer peripheral surface of the protrusion 43 and the inner peripheral surface of the convex portion 44 (the inner peripheral surface of the receiving port 33), and is compressed in the tube diameter direction. At this time, a gap 57 is formed over the entire circumference between the outer periphery of the second valve 49 expanded (expanded) in the tube diameter direction and the bottom surface of the recess 38.

その後、挿口３５がさらに受口３３に挿入されると、図５（ａ）に示すように、挿口３５の突部４３が第１バルブ４８の内周を通って第２バルブ４９の内周に当接する。この際、上記間隙５７が形成されているため、第２バルブ４９は、突部４３に対して、管径方向の外向きに変位して逃げることができる。   Thereafter, when the insertion port 35 is further inserted into the receiving port 33, the protrusion 43 of the insertion port 35 passes through the inner periphery of the first valve 48, as shown in FIG. Contact the circumference. At this time, since the gap 57 is formed, the second valve 49 can be displaced outward with respect to the protrusion 43 in the radial direction of the pipe.

その後、挿口３５がさらに受口３３に挿入されると、図５（ｂ），図１に示すように、挿口３５の突部４３は、第２バルブ４９の内周を通過した後、ロックリング４１を受口手前側から受口奥側へ通過する。これにより、一方の管３２と他方の管３４とが接合される。この際、第２バルブ４９は、管径方向において拡大（拡径）された状態であるため、挿口３５の外周面に張り付くとともに、第２バルブ４９の拡径に付随して第１バルブ４８が管径方向の外向きに押される。これにより、第１バルブ４８の第１シール部５０が凸部４４の内周面（受口３３の内周面）に圧接するとともに、第２バルブ４９の第２シール部５１が挿口３５の外周面に圧接するため、受口３３と挿口３５との間で高い水密性を保持することができる。   Thereafter, when the insertion port 35 is further inserted into the receiving port 33, as shown in FIGS. 5B and 1, the protrusion 43 of the insertion port 35 passes through the inner periphery of the second valve 49, Pass the lock ring 41 from the front side of the receiving port to the back side of the receiving port. Thereby, one pipe | tube 32 and the other pipe | tube 34 are joined. At this time, the second valve 49 is in an expanded (expanded) state in the tube diameter direction, and therefore sticks to the outer peripheral surface of the insertion port 35 and is attached to the expanded diameter of the second valve 49. Is pushed outward in the pipe radial direction. As a result, the first seal portion 50 of the first valve 48 is pressed against the inner peripheral surface of the convex portion 44 (the inner peripheral surface of the receiving port 33), and the second seal portion 51 of the second valve 49 is connected to the insertion port 35. Since it press-contacts to an outer peripheral surface, high watertightness can be maintained between the receiving port 33 and the insertion port 35. FIG.

上記のように挿口３５を受口３３に挿入した際、第１および第２バルブ４８，４９よりも薄いくびれ部５３が弾性変形することで、第２バルブ４９が管径方向において拡大するため、第２バルブ４９を管径方向において拡大させるのに要する力が低減され、これにより、挿口３５を受口３３に挿入する際に要する挿入力（接合力）を低減することができる。   When the insertion port 35 is inserted into the receiving port 33 as described above, the constricted portion 53 thinner than the first and second valves 48 and 49 is elastically deformed so that the second valve 49 expands in the tube diameter direction. The force required to expand the second valve 49 in the tube diameter direction is reduced, and thereby the insertion force (joining force) required when the insertion port 35 is inserted into the receiving port 33 can be reduced.

また、図４（ｂ）に示すように、先ず、挿口３５の先端が第２バルブ４９を管径方向において拡大し、その後、図４（ｃ）に示すように、突部４３が第１バルブ４８を圧縮するため、第２バルブ４９の管径方向における拡大と第１バルブ４８の圧縮とが同時に起こらず、これにより、挿口３５を受口３３に挿入する際に要する挿入力（接合力）を低減することができる。さらに、ヒール部４６の内径Ｊは第１バルブ４８の内径Ｋよりも大きいため、第１バルブ４８が圧縮される際、第１バルブ４８の一部がヒール部４６と挿口３５との間に逃げることができる。このことによっても、上記挿入力（接合力）を低減することができる。   Further, as shown in FIG. 4B, first, the tip of the insertion opening 35 expands the second valve 49 in the tube diameter direction, and then the projection 43 is the first as shown in FIG. 4C. Since the valve 48 is compressed, the expansion of the second valve 49 in the pipe radial direction and the compression of the first valve 48 do not occur at the same time, so that the insertion force (joining) required for inserting the insertion port 35 into the receiving port 33 Force) can be reduced. Further, since the inner diameter J of the heel portion 46 is larger than the inner diameter K of the first valve 48, when the first valve 48 is compressed, a part of the first valve 48 is interposed between the heel portion 46 and the insertion opening 35. I can escape. Also by this, the insertion force (bonding force) can be reduced.

また、図４（ｃ）に示すように、第１バルブ４８が突部４３の外周面と凸部４４の内周面との間に挟まれて圧縮されたとき、各凹部５２，５４，５５（図２参照）が逃げ代となって第１バルブ４８の圧縮量が減少する。これにより、挿口３５の突部４３が第１バルブ４８の内周をスムーズに通過するため、挿口３５を受口３３に挿入する際に要する挿入力（接合力）を低減することができる。また、図３に示すように、第１バルブ４８の厚さＴ１は第２バルブ４９の厚さＴ２よりも薄いため、これによっても、第１バルブ４８の管径方向の圧縮量が小さくなり、挿口３５の突部４３が第１バルブ４８の内周をスムーズに通過し、挿口３５を受口３３に挿入する際に要する挿入力（接合力）をさらに低減することができる。   4C, when the first valve 48 is sandwiched between the outer peripheral surface of the protrusion 43 and the inner peripheral surface of the convex portion 44 and compressed, the concave portions 52, 54, 55 are provided. (Refer to FIG. 2) becomes a clearance and the compression amount of the first valve 48 decreases. Thereby, since the protrusion 43 of the insertion port 35 passes smoothly through the inner periphery of the first valve 48, the insertion force (joining force) required when the insertion port 35 is inserted into the receiving port 33 can be reduced. . Further, as shown in FIG. 3, since the thickness T1 of the first valve 48 is thinner than the thickness T2 of the second valve 49, this also reduces the amount of compression of the first valve 48 in the tube diameter direction, The protrusion 43 of the insertion opening 35 passes smoothly through the inner periphery of the first valve 48, and the insertion force (joining force) required for inserting the insertion opening 35 into the receiving opening 33 can be further reduced.

また、図５（ａ）に示すように、挿口３５の突部４３が第２バルブ４９の内周を通過する際、間隙５７（図４（ｃ）参照）が逃げ代となって、第２バルブ４９が、突部４３に対して、管径方向の外向きに変位（拡径）して逃げる。これにより、挿口３５を受口３３に挿入する際に要する挿入力（接合力）をさらに低減することができる。   Further, as shown in FIG. 5A, when the protrusion 43 of the insertion port 35 passes through the inner periphery of the second valve 49, the gap 57 (see FIG. The two-valve 49 is displaced (expanded diameter) outward in the tube diameter direction with respect to the protrusion 43 and escapes. Thereby, the insertion force (joining force) required when inserting the insertion port 35 into the receiving port 33 can be further reduced.

また、互いに接合された管３２，３４内に水圧が作用すると、図１，図５（ｂ）に示すように、この水圧によってバルブ部４７を受口３３の奥側から手前側に押し出そうとする押出し力Ｆ１が管軸方向に作用する。これに対して、第１シール部５０の位置と第２シール部５１の位置とが管軸方向にずれているため、押出し力Ｆ１によってバルブ部４７が受口３３の奥側から手前側に押し出されてしまうのを防止することができる。特に、第１シール部５０の位置と第２シール部５１の位置との管軸方向におけるずれ量Ａを大きくするほど、大きな押出し力Ｆ１に対して、バルブ部４７が押し出されてしまうのを防止することができる。これにより、受口３３と挿口３５との間の水密性が向上する。   Further, when water pressure acts in the pipes 32 and 34 joined to each other, as shown in FIGS. 1 and 5 (b), the water pressure will push the valve portion 47 from the back side to the near side. Extrusion force F1 is applied in the tube axis direction. On the other hand, since the position of the first seal portion 50 and the position of the second seal portion 51 are displaced in the tube axis direction, the valve portion 47 is pushed out from the back side of the receiving port 33 to the near side by the pushing force F1. Can be prevented. In particular, the larger the deviation A in the tube axis direction between the position of the first seal portion 50 and the position of the second seal portion 51, the more the valve portion 47 is prevented from being pushed out with respect to a large pushing force F1. can do. Thereby, the watertightness between the receiving port 33 and the insertion port 35 is improved.

また、第２バルブ４９の横断面の直径（＝２×ｒ２）は凸部４４の内周面と挿口３５の外周面との管径方向の間隔Ｓよりも大きく形成されているため、バルブ部４７が押出し力Ｆ１によって押されても、第２バルブ４９は上記間隔Ｓを通過し難く、これによっても、バルブ部４７が受口３３の奥側から手前側に押し出されてしまうのを防止することができる。   Further, since the diameter (= 2 × r2) of the cross section of the second valve 49 is formed larger than the interval S in the tube diameter direction between the inner peripheral surface of the convex portion 44 and the outer peripheral surface of the insertion opening 35, the valve Even if the portion 47 is pushed by the pushing force F1, the second valve 49 is difficult to pass through the interval S, and this also prevents the valve portion 47 from being pushed out from the back side of the receiving port 33 to the near side. can do.

また、間隙５７にも水圧が作用するため、第２バルブ４９には管中心に向いた押付力Ｆ２が作用し、これにより、第２バルブ４９の第２シール部５１が挿口３５の外周面に強く押し付けられ、受口３３と挿口３５との間の水密性がさらに向上する。   Further, since the water pressure also acts on the gap 57, the pressing force F2 directed toward the tube center acts on the second valve 49, whereby the second seal portion 51 of the second valve 49 becomes the outer peripheral surface of the insertion port 35. The water tightness between the receiving port 33 and the insertion port 35 is further improved.

尚、上記実施の形態では、図１に示すように、挿口３５を受口３３に挿入して一方の管３２と他方の管３４とを接合した場合、第１バルブ４８の内周面が挿口３５の外周面に接触しているが、第１バルブ４８の内周面と挿口３５の外周面との間に隙間が形成されていてもよい。この場合、バルブ部４７が押出し力Ｆ１によって押されると、第２バルブ４９が上記第１バルブ４８の内周面と挿口３５の外周面との隙間に入り込むように押されるため、受口３３と挿口３５との間の水密性がさらに向上する。   In the above embodiment, as shown in FIG. 1, when the insertion port 35 is inserted into the receiving port 33 and one tube 32 and the other tube 34 are joined, the inner peripheral surface of the first valve 48 is Although it contacts the outer peripheral surface of the insertion port 35, a gap may be formed between the inner peripheral surface of the first valve 48 and the outer peripheral surface of the insertion port 35. In this case, when the valve portion 47 is pushed by the pushing force F1, the second valve 49 is pushed so as to enter the gap between the inner peripheral surface of the first valve 48 and the outer peripheral surface of the insertion port 35. And the watertightness between the insertion opening 35 is further improved.

３１ 管継手
３２ 一方の管
３３ 受口
３４ 他方の管
３５ 挿口
３７ 嵌め込み溝
３８ 凹部
３９ ロックリング収容溝
４１ ロックリング
４３ 突部
４４ 凸部
４５ シール材
４６ ヒール部
４７ バルブ部
４８ 第１バルブ
４９ 第２バルブ
５０ 第１シール部
５１ 第２シール部
５３ くびれ部
５７ 間隙
ｄ 第２バルブの内径
Ｄ 挿口の外径
Ｔ１ 第１バルブの厚さ
Ｔ２ 第２バルブの厚さ 31 Pipe joint 32 One pipe 33 Receptor 34 Other pipe 35 Insertion slot 37 Insertion groove 38 Recess 39 Lock ring housing groove 41 Lock ring 43 Projection 44 Projection 45 Sealing material 46 Heel part 47 Valve part 48 First valve 49 Second valve 50 First seal portion 51 Second seal portion 53 Constriction portion 57 Gap d Inner diameter D of second valve Outer diameter T1 First valve thickness T2 Second valve thickness

Claims (5)

互いに接続される一方の管の端部に形成された受口に、他方の管の端部に形成された挿口を挿入する管継手であって、
受口の内周面に、嵌め込み溝と、嵌め込み溝よりも奥側に位置する凹部と、凹部よりも奥側に位置するロックリング収容溝とが形成され、
ロックリング収容溝にロックリングが設けられ、
挿口の外周に、ロックリングに受口奥側から係合可能な突部が形成され、
突部は挿口の先端面よりも引き抜き方向へ後退した位置に形成され、
受口と挿口との間は弾性材からなる環状のシール材によって全周にわたりシールされ、
シール材は、嵌め込み溝内に嵌め込まれるヒール部と、受口の内周面と挿口の外周面との間に挟まれるバルブ部とを有し、
バルブ部は互いに接合された第１バルブと第２バルブとを備え、
第１バルブの外周部に、受口の内周面に圧接する第１シール部が形成され、
第２バルブの内周部に、挿口の外周面に圧接する第２シール部が形成され、
第１バルブがヒール部に接合され、
第１バルブと第２バルブとの接合部分にはくびれ部が形成され、
第２バルブは、第１バルブに対して受口の奥側に位置し、且つ、第１バルブから管中心に向って傾斜しており、
ヒール部は、第１バルブに対して、受口の奥側とは反対の手前側に位置し、
第２バルブは、その内径が挿口の外径よりも小さく設定され、且つ、くびれ部の変形により管径方向において拡縮自在であり、
第２バルブの外周と凹部の底面との間に間隙が形成されており、
挿口が受口に挿入される際、先ず、第２バルブが挿口の先端によって挿入方向へ押されながら拡径し、次に、挿口がさらに受口に挿入されると、第１バルブが突部の外周面と受口の内周面との間に挟まれて管径方向において圧縮され、その後、挿口がさらに受口に挿入されて突部が第２バルブの内周に当接すると、第２バルブが突部に対して間隙内を管径方向の外向きに逃げることを特徴とする管継手。 A pipe joint that inserts an insertion opening formed at the end of the other pipe into a receiving opening formed at the end of one pipe connected to each other,
On the inner peripheral surface of the receiving port, there are formed a fitting groove, a recess located on the back side of the fitting groove, and a lock ring housing groove located on the back side of the recess,
A lock ring is provided in the lock ring receiving groove,
A protrusion that can be engaged with the lock ring from the back of the receiving port is formed on the outer periphery of the insertion port,
The protrusion is formed at a position retracted in the extraction direction from the front end surface of the insertion opening,
The space between the receiving port and the insertion port is sealed all around by an annular sealing material made of an elastic material,
The sealing material has a heel portion that is fitted into the fitting groove, and a valve portion that is sandwiched between the inner peripheral surface of the receiving port and the outer peripheral surface of the insertion port,
The valve portion includes a first valve and a second valve joined to each other,
A first seal portion that is in pressure contact with the inner peripheral surface of the receiving port is formed on the outer peripheral portion of the first valve,
A second seal portion that is in pressure contact with the outer peripheral surface of the insertion port is formed on the inner peripheral portion of the second valve,
The first valve is joined to the heel,
A constriction is formed at the joint between the first valve and the second valve,
The second valve is located on the back side of the receiving port with respect to the first valve, and is inclined from the first valve toward the pipe center,
The heel portion is located on the front side opposite to the back side of the receiving port with respect to the first valve,
The second valve, the inner diameter is smaller than the outer diameter of the spigot, and, Ri scaled freely der in pipe diameter direction by the deformation of the constricted portion,
A gap is formed between the outer periphery of the second valve and the bottom surface of the recess,
When the insertion port is inserted into the receiving port, first, the second valve is expanded in diameter while being pushed in the insertion direction by the distal end of the insertion port, and then when the insertion port is further inserted into the receiving port, the first valve Is sandwiched between the outer peripheral surface of the projection and the inner peripheral surface of the receiving port and compressed in the pipe radial direction, and then the insertion port is further inserted into the receiving port, so that the projection hits the inner periphery of the second valve. A pipe joint characterized in that the second valve escapes outwardly in the radial direction of the pipe with respect to the protrusion when it comes into contact . くびれ部は第１および第２バルブよりも薄いことを特徴とする請求項１記載の管継手。 The pipe joint according to claim 1, wherein the constricted portion is thinner than the first and second valves . 第１シール部は受口の嵌め込み溝と凹部との間に形成された凸部の内周面に圧接し、
第１シール部の位置と第２シール部の位置とが管軸方向にずれていることを特徴とする請求項１又は請求項２記載の管継手。 The first seal portion is in pressure contact with the inner peripheral surface of the convex portion formed between the fitting groove of the receiving port and the concave portion,
The pipe joint according to claim 1 or 2, wherein the position of the first seal part and the position of the second seal part are shifted in the pipe axis direction . 第１バルブの管径方向の厚さは第２バルブの管径方向の厚さよりも薄いことを特徴とする請求項１から請求項３のいずれか１項に記載の管継手。The pipe joint according to any one of claims 1 to 3, wherein a thickness of the first valve in the pipe radial direction is thinner than a thickness of the second valve in the pipe radial direction. 上記請求項１から請求項４のいずれか１項に記載の管継手に用いられることを特徴とするシール材。The sealing material used for the pipe joint according to any one of claims 1 to 4.
JP2009014836A 2009-01-27 2009-01-27 Pipe fittings and seals Active JP5455382B2 (en)

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JP2009014836A JP5455382B2 (en) 2009-01-27 2009-01-27 Pipe fittings and seals
US13/146,256 US8573654B2 (en) 2009-01-27 2010-01-22 Pipe joint
PCT/JP2010/050755 WO2010087275A1 (en) 2009-01-27 2010-01-22 Pipe joint
CN201310088677.0A CN103133793B (en) 2009-01-27 2010-01-22 Tube joint
KR1020117016070A KR101488752B1 (en) 2009-01-27 2010-01-22 Pipe joint and pipe connecting apparatus
CN201310089167.5A CN103148293B (en) 2009-01-27 2010-01-22 Pipe joint
KR1020137025902A KR101585909B1 (en) 2009-01-27 2010-01-22 Pipe joint
EP10735744.4A EP2392845B1 (en) 2009-01-27 2010-01-22 Pipe joint
KR1020137025901A KR101514689B1 (en) 2009-01-27 2010-01-22 Pipe joint
CN201310089272.9A CN103174889B (en) 2009-01-27 2010-01-22 Pipe joint
CN201410161002.9A CN103925432B (en) 2009-01-27 2010-01-22 Pipe joint
CN201410165455.9A CN104075050B (en) 2009-01-27 2010-01-22 Pipe joint
CN201080005536.2A CN102301172B (en) 2009-01-27 2010-01-22 Pipe joint
TW103130994A TWI542805B (en) 2009-01-27 2010-01-27 Pipe fittings
TW099102264A TWI487862B (en) 2009-01-27 2010-01-27 Pipe fittings
TW103130993A TWI530636B (en) 2009-01-27 2010-01-27 Pipe fittings and fittings for the locking ring
TW103130995A TWI542806B (en) 2009-01-27 2010-01-27 Joints and fittings for pipe joints
US14/022,299 US9488300B2 (en) 2009-01-27 2013-09-10 Pipe joint
US14/220,433 US9719618B2 (en) 2009-01-27 2014-03-20 Pipe joint
US14/974,062 US10006572B2 (en) 2009-01-27 2015-12-18 Pipe joint
US14/974,118 US10520119B2 (en) 2009-01-27 2015-12-18 Pipe joint

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JP5667126B2 (en) * 2012-06-25 2015-02-12 株式会社クボタ Sealing material and pipe fittings
JP5665801B2 (en) * 2012-06-25 2015-02-04 株式会社クボタ Pressers and fittings and valves
JP5950989B2 (en) * 2014-12-10 2016-07-13 株式会社クボタ Sealing material and pipe fittings
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JPH05231570A (en) * 1992-02-20 1993-09-07 Kubota Corp Rubber ring for slip-off preventive tube joint
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