JP3411546B2 - Pipe fitting - Google Patents
Pipe fittingInfo
- Publication number
- JP3411546B2 JP3411546B2 JP2000210390A JP2000210390A JP3411546B2 JP 3411546 B2 JP3411546 B2 JP 3411546B2 JP 2000210390 A JP2000210390 A JP 2000210390A JP 2000210390 A JP2000210390 A JP 2000210390A JP 3411546 B2 JP3411546 B2 JP 3411546B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- tightening
- insertion tube
- diameter
- ring body
- 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
Links
Classifications
-
- 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
- F16L37/088—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 split elastic ring
-
- 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
- F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
- F16L33/02—Hose-clips
- F16L33/03—Self-locking elastic clips
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joints With Pressure Members (AREA)
- Joints With Sleeves (AREA)
- Joints That Cut Off Fluids, And Hose Joints (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、管継手に関する。TECHNICAL FIELD The present invention relates to a pipe joint.
【０００２】[0002]
【従来の技術】合成樹脂材から成る給水や給湯用等のパ
イプを接続するための管継手は、従来、例えば、図13に
示すように、パイプａを抜け止め状態に被嵌・掛止させ
るための複数段の周状テーパー（タケノコ状）が形成さ
れた挿入筒部ｂを有する継手本体ｃと、切り割りｄを有
する割リングｅと、その割リングｅを縮径させるための
袋ナットｆと、その袋ナットｆに内嵌される抜け止めリ
ングｈと、から成るもの等が用いられていた。2. Description of the Related Art A conventional pipe joint for connecting pipes for supplying water or hot water, which is made of a synthetic resin material, has a pipe a fitted and hooked in a retaining state as shown in FIG. Joint body c having an insertion tube portion b formed with a plurality of stages of circumferential taper (bamboo shoot shape), a split ring e having a slit d, and a cap nut f for reducing the diameter of the split ring e. , A retaining ring h fitted in the cap nut f, and the like have been used.
【０００３】このような管継手では、まず、パイプａ
に、袋ナットｆと抜け止めリングｈと割リングｅを嵌め
込んで、そのパイプａを、継手本体ｃの挿入筒部ｂに押
し込んで被嵌させ、次いで、袋ナットｆを、継手本体ｃ
のネジ部ｇにねじ込むことにより、その割リングｅを縮
径させて、パイプａを継手本体ｃの挿入筒部ｂに抜け止
め状態に掛止させるようにしていた。In such a pipe joint, first, the pipe a
Then, the cap nut f, the retaining ring h, and the split ring e are fitted in, and the pipe a is pushed into the insertion tube portion b of the joint body c to be fitted therein, and then the cap nut f is fitted in the joint body c.
The split ring e is reduced in diameter by being screwed into the threaded portion g, so that the pipe a is retained in the insertion tubular portion b of the joint main body c in a retaining state.
【０００４】さらに、抜け止めリングｈを、継手本体ｃ
の挿入筒部ｂに外嵌されたパイプａの外周面に抜け止め
状態に内周側が掛止するようにし、パイプａに（挿入筒
部ｂからの）引き抜き力が発生しても、パイプａの引き
抜けが防止される。即ち、図14に示すように、抜止リン
グｈの内周側には、周方向に分割された複数個の歯部ｉ
…が設けられ、その歯部ｉ…が、パイプａの外周面に掛
止する。Further, the retaining ring h is attached to the joint body c.
Even if a pulling force (from the insertion tube portion b) is generated on the pipe a, the outer surface of the pipe a fitted on the insertion tube portion b of FIG. Is prevented from being pulled out. That is, as shown in FIG. 14, on the inner peripheral side of the retaining ring h, there are a plurality of circumferentially divided tooth portions i.
Are provided, and their tooth portions i ... Hook on the outer peripheral surface of the pipe a.
【０００５】[0005]
【発明が解決しようとする課題】しかし、従来の管継手
は、３つの部品から成るため、部品管理が煩瑣であり、
特に、多数の管継手が必要とされる場合には、現場で、
これらの部品を過不足なく揃えるは容易ではなく、ま
た、部品が紛失しやすいという問題もあった。しかも、
その組付け作業は、３つの工程を要して手間がかかり、
能率が上がらなかった。However, since the conventional pipe joint is made up of three parts, the parts management is complicated,
Especially when many pipe fittings are required,
It is not easy to align these parts without excess or deficiency, and there is a problem that the parts are easily lost. Moreover,
The assembly work requires three steps and is laborious,
The efficiency did not improve.
【０００６】また、パイプａを外周面から締め付けるこ
とにより、シール性を確保しているため、パイプａの径
のばらつきや熱変形等による寸法変化がある場合には、
充分な止水性能を確保できないことがあった。特に、温
度変化が大きい環境条件下では、長期にわたり高い止水
性能を安定して維持できないことがあった。Further, since the sealing property is secured by tightening the pipe a from the outer peripheral surface, when there is a dimensional change due to variations in the diameter of the pipe a or thermal deformation,
In some cases, sufficient water-stopping performance could not be ensured. In particular, under environmental conditions where the temperature change is large, it may not be possible to stably maintain high water-stopping performance for a long period of time.
【０００７】さらに、抜け止めリングｈの歯部ｉ…は、
リング体を（プレスなどで）打ち抜くことで形成されて
いるため、隣り合う歯部ｉ，ｉの隙間が大きく設定さ
れ、歯部ｉ…のパイプａの外周面への接触面積が小さく
なると共に接触面圧が大きくなり、パイプａへの負担が
大きくなる。即ち、歯部ｉ…がパイプａに食い込み、パ
イプａが切断などの損傷を受ける。Further, the tooth portions i ... Of the retaining ring h are
Since the ring body is formed by punching (using a press or the like), the gap between the adjacent tooth portions i, i is set to be large, and the contact area of the tooth portion i ... The surface pressure increases and the load on the pipe a increases. That is, the tooth portions i ... bite into the pipe a, and the pipe a is damaged by cutting or the like.
【０００８】そこで、本発明は、組付け作業性が良好で
あり、かつ、被接続用のパイプに損傷を与えることな
く、部品の管理や調達が容易で、部品紛失のおそれが少
なく、長期にわたり安定した止水性能を維持することが
できる管継手を提供することを目的とする。In view of the above, the present invention has good workability in assembling, is easy to manage and procure parts without damaging the pipes to be connected, is less likely to lose parts, and can be used for a long period of time. It is an object of the present invention to provide a pipe joint that can maintain stable water stop performance.
【０００９】[0009]
【課題を解決するための手段】上述の目的を達成するた
めに、本発明に係る管継手は、被接続用のパイプの端部
に挿入される挿入筒部を有する継手本体と、上記挿入筒
部の凹周溝に装着されるシール部材と、上記挿入筒部に
外嵌された上記パイプの端部を弾発的な締め付け力で締
め付けるためのスリット付きの締付環体と、該締付環体
の弾発力に抗して該締付環体を拡径するように上記スリ
ットの端部に離脱可能に挾持されて、挿入される上記パ
イプの先端部に当接して離脱する拡径片と、被接続用の
パイプの端部に挿入される挿入筒部を有する継手本体
と、上記挿入筒部に外嵌された上記パイプの外周面に抜
け止め状態に内周側が掛止する抜け止めリングと、を具
備し、該抜け止めリングの内周側には、周方向に等間隔
に切り込み形成された複数個の歯部が設けられたもので
ある。To achieve the above object, according to the Invention The pipe joint according to the present invention includes: a fitting body having an insertion cylinder portion inserted to an end portion of the pipe for the connection, on Symbol Insert A seal member mounted in the concave circumferential groove of the tubular portion, a tightening ring body with a slit for tightening the end portion of the pipe fitted on the insertion cylindrical portion with an elastic tightening force, and the tightening body. The expansion ring is detachably held by the end of the slit so as to expand the diameter of the tightening ring against the elastic force of the ring, and abuts against the tip of the pipe to be inserted and expands. The inner peripheral side engages with the diameter piece, the joint main body having the insertion cylinder portion inserted into the end portion of the pipe to be connected, and the outer peripheral surface of the pipe externally fitted to the insertion cylinder portion in a retaining state so as not to come off. A retaining ring, and notches are formed on the inner peripheral side of the retaining ring at equal intervals in the circumferential direction. In which a plurality of teeth is provided.
【００１０】また、挿入筒部の外周面には、抜け止めリ
ングの歯部と対応する部位に、凹部が設けられたもので
ある。Further, the outer peripheral surface of the insertion tube portion is provided with a recess at a portion corresponding to the tooth portion of the retaining ring.
【００１１】[0011]
【発明の実施の形態】以下、実施の形態を示す図面に基
づき、本発明を詳説する。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below in detail with reference to the drawings showing the embodiments.
【００１２】図１は、管継手Ｃの実施の一形態を示す正
面断面図、図２はパイプを接続した状態の正面断面図
で、これらの図において、符号１は接続対象となる給
水、給湯用等のパイプで、例えば、架橋ポリエチレン又
はポリブテン等の合成樹脂材から成る。２は継手本体
で、その一端側には、パイプ１の端部に挿入される挿入
筒部３を有する。FIG. 1 is a front sectional view showing an embodiment of a pipe joint C, and FIG. 2 is a front sectional view showing a state where pipes are connected. In these drawings, reference numeral 1 is a water supply or hot water supply to be connected. A pipe for business use, which is made of a synthetic resin material such as cross-linked polyethylene or polybutene. Reference numeral 2 denotes a joint body, which has an insertion tube portion 3 inserted into the end portion of the pipe 1 at one end side thereof.
【００１３】４はシール部材（Ｏリング等）で、継手本
体２の挿入筒部３の凹周溝７に装着されている。５は締
付環体で、バネ鋼等から成り、軸心方向のスリット（切
割部）51を有し、挿入筒部３に外嵌されたパイプ１の端
部を弾発的な締め付け力で締め付ける。６は拡径片で、
高剛性な鋼材から成り、図１に示す初期状態にて、締付
環体５の弾発力に抗して、そのスリット51の端部に離脱
可能に圧入され、該締付環体５を、パイプ１の挿入が可
能な程度に拡径している。Reference numeral 4 denotes a seal member (O-ring or the like), which is mounted in the concave circumferential groove 7 of the insertion tube portion 3 of the joint body 2. Reference numeral 5 denotes a tightening ring body made of spring steel or the like, having a slit (cutting portion) 51 in the axial direction, and the end portion of the pipe 1 fitted on the insertion tube portion 3 is elastically tightened. tighten. 6 is an expanding piece,
It is made of high-rigidity steel material, and in the initial state shown in FIG. 1, it is removably press-fitted into the end of the slit 51 against the elastic force of the tightening ring body 5, and the tightening ring body 5 is removed. The diameter is enlarged to the extent that the pipe 1 can be inserted.
【００１４】14は、締付環体５を覆うカバーであり、そ
のカバー14の基部内周に形成された雌ネジ141 が、継手
本体２の挿入筒部３の基部寄りの外周に形成した雄ネジ
19に螺合し、かつ、そのカバー14と、挿入筒部３との間
に、締付環体５のスリット51から離脱した拡径片６を収
納するためのリング状の逃げ用空間16を形成している。
また、カバー14は、ＰＡ（ポリアミド，ナイロン）又は
ＰＥＳ（ポリエーテルサルフォン）又はＰＣ（ポリカー
ボネート）等の透明樹脂から成るのが好ましく、拡径片
６の離脱を、外から（目視で）容易に確認できる。Reference numeral 14 denotes a cover for covering the tightening ring body 5, and a female screw 141 formed on the inner circumference of the base of the cover 14 is a male thread formed on the outer circumference of the insertion tube 3 of the joint body 2 near the base. screw
A ring-shaped escape space 16 for screwing the expanded diameter piece 6 detached from the slit 51 of the tightening ring body 5 is provided between the cover 14 and the insertion cylinder portion 3 which is screwed to 19. Is forming.
The cover 14 is preferably made of a transparent resin such as PA (polyamide, nylon), PES (polyether sulfone), or PC (polycarbonate), so that the expansion piece 6 can be easily removed from the outside (visually). Can be confirmed.
【００１５】８は、カバー14の一端側（端部）に配設さ
れた抜け止めリングで、ＳＵＳ材（例えば、ＳＵＳ304-
ＣＳＰ（１／２Ｈ））等の弾発力を有する高剛性な板金
材から成り、その内周側には、周方向に等間隔に切り込
み形成されると共にパイプ１の挿入方向Ａ（図１参照）
に折り曲げされてパイプ１の外周面に掛止する複数個の
歯部12…を有し、カバー14の外周面に形成された雄ネジ
９に螺合する袋ナット10によって、着脱自在に締め付け
固定されている。なお、袋ナット10は、真鍮等の銅合金
や、プラスチック複合材料（例えば、変性ＰＰＯ（ＧＦ
30））等から成る。Reference numeral 8 denotes a retaining ring disposed on one end side (end portion) of the cover 14, which is a SUS material (for example, SUS304-
It is made of a highly rigid sheet metal material having elastic force such as CSP (1 / 2H), and is formed with notches at equal intervals in the circumferential direction on the inner peripheral side thereof and the insertion direction A of the pipe 1 (see FIG. 1). )
It is detachably tightened and fixed by a cap nut 10 that has a plurality of tooth portions 12 that are bent to be hooked on the outer peripheral surface of the pipe 1 and that is screwed into a male screw 9 formed on the outer peripheral surface of the cover 14. Has been done. The cap nut 10 is made of a copper alloy such as brass or a plastic composite material (for example, modified PPO (GF
30)) etc.
【００１６】具体的に述べると、抜け止めリング８は、
次のように形成される。即ち、図３に、抜け止めリング
８の形成途中の側面図（Ａ）及び正面断面図（Ｂ）を示
し、所定の環状体23に、その内周面から径方向に所定の
長さの切込部24を、その周方向に所定のピッチ（中心角
度）で設けて、周方向に分割された複数個（本実施の形
態では18個）の歯部12…を形成し、図４に示すように、
その歯部12…を軸心方向に折り曲げて、花弁形状（菊座
状）の抜け止めリング８を形成する。More specifically, the retaining ring 8 is
It is formed as follows. That is, FIG. 3 shows a side view (A) and a front cross-sectional view (B) during formation of the retaining ring 8, showing a predetermined annular body 23, which is cut from the inner peripheral surface thereof to a predetermined length in the radial direction. 4A and 4B, the recesses 24 are provided at a predetermined pitch (center angle) in the circumferential direction to form a plurality of (18 in the present embodiment) tooth portions 12 ... like,
The tooth portions 12 are bent in the axial direction to form a petal-shaped (Chrysalis-shaped) retaining ring 8.
【００１７】なお、切込部24（隣り合う歯部12，12の隙
間）は、プレスで抜き落すのではなく、プレスによりハ
サミで切るように歯切りして形成される。また、切込部
24の（径方向外方の）端部には、穴あけ加工により、
（円形状の）小孔部25が貫設される。従って、歯部12…
を、楽に折り曲げることができると共に、隣り合う歯部
12，12の隙間を（図14に示す従来例に比べて、）小さく
設定することができる。The cut portion 24 (a gap between the adjacent tooth portions 12 and 12) is formed by cutting with a scissors by a press, not by using a press. Also, the notch
At the end of 24 (outward in the radial direction), by drilling,
A small hole (circular shape) 25 is provided therethrough. Therefore, the tooth 12 ...
Can be bent easily and adjacent teeth
The gap between 12 and 12 can be set small (compared to the conventional example shown in FIG. 14).
【００１８】挿入筒部３の外周面には、抜け止めリング
８の歯部12…と対応（対向）する部位に（環状の）凹部
21が設けられると共に、締付環体５と対応（対向）する
部位に（環状の）段付き部22が設けられている。さら
に、継手本体２の他端側（端部）には、接続対象となる
部材（図示省略）に螺合する雄ネジ17が形成されてい
る。On the outer peripheral surface of the insertion tube portion 3, a (annular) recess is formed at a portion corresponding to (opposing) the tooth portions 12 of the retaining ring 8.
21 is provided, and a (annular) stepped portion 22 is provided at a portion corresponding (opposing) to the tightening ring body 5. Further, on the other end side (end portion) of the joint body 2, a male screw 17 that is screwed into a member (not shown) to be connected is formed.
【００１９】締付環体５は、その自由状態（縮径状態）
を表す図５の側面図（Ａ）と要部（図５（Ａ）の仮想円
内）拡大図（Ｂ）及び図６、及び、拡径状態を表す図７
の側面図（Ａ）と要部（図７（Ａ）の仮想円内）拡大図
（Ｂ）及び図８に示されるように、そのスリット51は、
一方の端面52に形成された突部521 が、他方の端面53に
形成された凹部531 に嵌合するように、凹凸嵌合状に形
成されている。スリット51をこのような形状にすること
により、パイプ１に対する締め付け力を円周方向に途切
れることなく連続的に作用させることができ、シール部
材４に対してパイプ１を閉ループ状に万遍なく押圧する
ことができ、軸心方向の流体洩れを防止してシール性が
向上する。The tightening ring body 5 is in its free state (reduced diameter state).
5 is a side view (A) of FIG. 5 and an enlarged view (B) and FIG. 6 of a main part (inside a virtual circle of FIG. 5A), and FIG.
As shown in a side view (A) of FIG. 8 and an enlarged view (B) of FIG. 8 and an essential part (inside a virtual circle of FIG. 7A), the slit 51 is
A protrusion 521 formed on one end face 52 is formed in a concave-convex fitting shape so as to fit into a recess 531 formed on the other end face 53. By forming the slit 51 in such a shape, the tightening force on the pipe 1 can be continuously applied without interruption in the circumferential direction, and the pipe 1 is uniformly pressed against the seal member 4 in a closed loop shape. It is possible to prevent fluid leakage in the axial direction and improve the sealing performance.
【００２０】また、そのスリット51を挟んでその両側に
対向し合う両端面52，53の内側端縁部が、アール（Ｒ）
状に面取りされている。その内側端縁部の曲率半径Ｒ
は、接続するパイプ１の径や肉厚、材質等に応じて適宜
に設定されればよいが、自由状態での締付環体５の外径
が15〜35mmφの場合、Ｒ＝0.4 〜0.6mm 程度に設定され
るのが好ましい。このように、両端面52，53の内側端縁
部をアール（Ｒ）状に面取りすることにより、縮径時に
パイプ１の表面を疵付けることがなく、締付環体５の縮
径動作がよりスムーズとなり、パイプ１に対して強い締
め付け力を作用させることができる。Further, the inner end edges of both end faces 52, 53 which face each other across the slit 51 are rounded (R).
It is chamfered into a shape. Radius of curvature R of the inner edge
May be appropriately set according to the diameter, wall thickness, material, etc. of the pipe 1 to be connected, but when the outer diameter of the tightening ring body 5 in the free state is 15 to 35 mmφ, R = 0.4 to 0.6 It is preferably set to about mm. In this manner, by chamfering the inner end edge portions of the both end surfaces 52, 53 in a rounded (R) shape, the diameter reduction operation of the tightening ring body 5 can be performed without scratching the surface of the pipe 1 at the time of diameter reduction. It becomes smoother and a strong tightening force can be applied to the pipe 1.
【００２１】拡径片６は、図９の拡大斜視図及び図10の
正面図（Ａ）と側面図（Ｂ）に示すように、スリット51
に圧入される圧入部61と、締付環体５の側端面に当接し
て該拡径片６の圧入位置を規制する規制部62と、が一体
的に形成されて成る。その圧入部61の外径側（圧入時
の）の両側部には、締付環体５のスリット51に挾持され
る被圧接面611, 611が形成される。As shown in the enlarged perspective view of FIG. 9 and the front view (A) and side view (B) of FIG. 10, the diameter expanding piece 6 has a slit 51.
A press-fitting portion 61 that is press-fitted into the press-fitting portion and a restricting portion 62 that contacts the side end surface of the tightening ring body 5 and restricts the press-fitting position of the expanded diameter piece 6 are integrally formed. Pressed contact surfaces 611, 611 held by the slit 51 of the tightening ring body 5 are formed on both outer diameter sides (when press-fitting) of the press-fitting portion 61.
【００２２】また、拡径片６の圧入部61はその端部に折
曲げ部612 が設けられ、該折曲げ部612 に規制部62が連
設されている。具体的に述べると、圧入部61は、矩形状
の平板の一辺側を折り曲げて形成され、規制部62は、圧
入部61よりも幅広の矩形状の平板でその一辺端面がテー
パー状に形成され、圧入部61と規制部62が連設されてい
る。即ち、拡径片６は、略凸字状（乃至Ｔ字状）の平板
の中途部を折り曲げた形状をしている。Further, the press-fitting portion 61 of the expanded diameter piece 6 is provided with a bent portion 612 at its end portion, and the bent portion 612 is continuously provided with a restriction portion 62. Specifically, the press-fitting portion 61 is formed by bending one side of the rectangular flat plate, and the restricting portion 62 is a rectangular flat plate that is wider than the press-fitting portion 61, and one end face of which is tapered. The press-fitting portion 61 and the regulating portion 62 are connected in series. That is, the diameter-expanding piece 6 has a shape obtained by bending the middle part of a substantially convex (or T-shaped) flat plate.
【００２３】そして、図７及び図８に示すように、拡径
片６が締付環体５に圧入された状態にて、圧入部61が締
付環体５の内側両端縁部に挾持されると共にその端部側
が締付環体５の径方向内方へ突設され、規制部62が締付
環体５の軸心方向外方へ突設されている。Then, as shown in FIGS. 7 and 8, the press-fitting portions 61 are sandwiched between the inner end edges of the tightening ring body 5 in a state where the expanded diameter piece 6 is press-fitted into the tightening ring body 5. At the same time, its end portion is provided so as to project inward in the radial direction of the tightening ring body 5, and the restriction portion 62 is provided so as to project outward in the axial center direction of the tightening ring body 5.
【００２４】具体的に述べると、圧入部61の被圧接面61
1 ，611 の中途部が、締付環体５の両端面52，53の内周
側両端縁部に挾まれており、圧入部61が、挿入されるパ
イプ１の先端面に当接可能となるように締付環体５の径
方向内方へ突設され、規制部62がそのテーパー状の一辺
側が先端となるように締付環体５の軸心方向外方へ突設
されている。Specifically, the press-contact surface 61 of the press-fitting portion 61
The middle part of 1, 611 is sandwiched by the inner peripheral side end edges of both end faces 52, 53 of the tightening ring body 5, and the press-fitting part 61 can contact the tip end face of the pipe 1 to be inserted. So as to project inward in the radial direction of the tightening ring body 5, and the restriction portion 62 projects outward in the axial direction of the tightening ring body 5 such that one side of the tapered shape is the tip. .
【００２５】そして、図１に示すように、このように組
み合わされた締付環体５と拡径片６を、カバー14の内部
に嵌込む。なお、カバー14の内周面には、周方向に複数
個（例えば３個）の当り部15…が設けられ、締付環体５
の端面が当り部15…に当接して、締付環体５が必要以上
に軸心方向奥側へ移動しないように抑制している。Then, as shown in FIG. 1, the tightening ring body 5 and the expanded diameter piece 6 thus combined are fitted into the inside of the cover 14. In addition, a plurality of (for example, three) contact portions 15 ... Are provided in the inner peripheral surface of the cover 14 in the circumferential direction, and the tightening ring body 5
The end face of the contacting member abuts on the abutting portions 15 and prevents the tightening ring body 5 from moving unnecessarily inward in the axial direction.
【００２６】この際、締付環体５は、当り部15…と抜け
止めリング８との間で、カバー14の内部を軸心方向へ微
小距離（例えば１mm程度）移動自在となるが、拡径片６
は、（その微小距離より長い）規制部62を、締付環体５
の端面から出っ張り状に配設されているため、締付環体
５をカバー14の内部に嵌込むときに、当り部15…と締付
環体５の端面との間の隙間に、拡径片６（規制部62）を
挾むことを防止でき、従って、拡径片６を締付環体５か
ら確実に離脱させることができる。At this time, the tightening ring 5 is movable in the inside of the cover 14 in the axial direction by a minute distance (for example, about 1 mm) between the contact portions 15 ... Diameter piece 6
Means that the restriction portion 62 (longer than the minute distance) is attached to the tightening ring 5
Since it is arranged so as to project from the end surface of the fastening ring body 5, when the tightening ring body 5 is fitted into the cover 14, the diameter of the contact ring 15 and the end surface of the tightening ring body 5 are expanded. It is possible to prevent the piece 6 (regulating portion 62) from being caught, and therefore, the expanded diameter piece 6 can be reliably separated from the tightening ring body 5.
【００２７】そして、パイプ１を矢印Ａ方向へ挿入して
いくと、図11（Ａ）に示すように、パイプ１の先端面
が、拡径片６の圧入部61を押圧し、拡径片６が規制部62
の外径側端部ｓを中心として回動（揺動）しながら、圧
入部61がスリット51から離脱していく。なお、規制部62
の外径側端部ｓと、パイプ１の先端部が当接する圧入部
61の当接部位ｐと、の間には、挿入したパイプ１によっ
て、圧入状態の拡径片６に対して十分な回転モーメント
を作用させることができるように、所定の間隔ｒが設定
され、拡径片６のスリット51からの離脱を容易としてい
る。Then, when the pipe 1 is inserted in the direction of arrow A, as shown in FIG. 11 (A), the tip end surface of the pipe 1 presses the press-fitting portion 61 of the diameter expanding piece 6 to expand the diameter expanding piece. 6 is the regulation unit 62
The press-fitting portion 61 separates from the slit 51 while rotating (swinging) around the outer diameter side end portion s of the. The regulation unit 62
The outer diameter side end portion s of the pipe and the press-fitting portion where the tip portion of the pipe 1 abuts
A predetermined interval r is set between the contact portion p of 61 and the pipe 1 inserted so that a sufficient rotation moment can be applied to the expanded diameter piece 6 in the press-fitted state. The expansion piece 6 is easily removed from the slit 51.
【００２８】さらに、パイプ１を挿入していくと、図11
（Ｂ）に示すように、規制部62の先端部がカバー14の内
面に当接点ｎにて当接し、拡径片６は、外径側端部ｓに
代わって当接点ｎを中心として、回動し、図11（Ｃ）に
示すように、圧入部61がスリット51から離脱していき、
図２に示すように、拡径片６が締付環体５から離脱して
パイプ１の締付接続状態となる。When the pipe 1 is further inserted, as shown in FIG.
As shown in (B), the tip end of the restricting portion 62 abuts on the inner surface of the cover 14 at a contact point n, and the expanded diameter piece 6 is centered on the contact point n instead of the outer diameter side end s. By rotating, the press-fitting portion 61 is separated from the slit 51 as shown in FIG.
As shown in FIG. 2, the expanded diameter piece 6 separates from the tightening ring body 5 to bring the pipe 1 into the tightened connection state.
【００２９】このように、パイプ１の先端面は、平坦状
の圧入部61を押圧するので、パイプ１が柔らかい樹脂の
場合でも、パイプ１の先端面が圧入部61に突き刺さるこ
とがない。また、図７（Ｂ）に示すように、圧入部61が
締付環体５の内側両端縁部に挾持されているため、周方
向からの力に対しても、拡径片６は安定した挾持姿勢を
保持することができ、従って、パイプ１をねじ込むよう
に回転させながら挿入しても、拡径片６が締付環体５か
ら離脱しない。さらに、図11（Ｂ）に示すように、拡径
片６の回動の中心（支点）が、外径側端部ｓから当接点
ｎに変移することにより、回転モーメントを大きくで
き、一層軽い力で、確実に、拡径片６を離脱することが
できる。As described above, since the tip end surface of the pipe 1 presses the flat press-fitting portion 61, the tip end surface of the pipe 1 does not stick into the press-fitting portion 61 even when the pipe 1 is made of soft resin. Further, as shown in FIG. 7 (B), since the press-fitting portion 61 is sandwiched between the inner end edges of the tightening ring body 5, the diameter-expanding piece 6 is stable against the force from the circumferential direction. The holding posture can be maintained, and therefore, even when the pipe 1 is inserted while being rotated so as to be screwed in, the expanded diameter piece 6 does not separate from the tightening ring body 5. Further, as shown in FIG. 11 (B), the center of rotation (fulcrum) of the expanded diameter piece 6 is changed from the outer diameter side end portion s to the contact point n, so that the rotational moment can be increased and the weight is further reduced. The expanded diameter piece 6 can be reliably separated by force.
【００３０】また、拡径片６が、スリット51から離脱す
る時には、外部から確認できる程度のパチンという離脱
音が発生し、拡径片６は、図２に示すように、逃げ用空
間16に放出されると共に、直ちに、締付環体５が縮径し
て、パイプ１が締め付けられ、パイプ１の内面が、シー
ル部材４に密接して密封状態となり、パイプ１の外周面
に抜け止め状態に掛止する。このように、拡径片６の離
脱音により、パイプ１の締め付け（挿入）が完了したこ
とを作業者が明確に確認することができる。When the expanded diameter piece 6 separates from the slit 51, a snapping sound that can be confirmed from the outside is generated, and the expanded diameter piece 6 is placed in the escape space 16 as shown in FIG. Immediately after being discharged, the diameter of the tightening ring body 5 is reduced and the pipe 1 is tightened, and the inner surface of the pipe 1 is brought into close contact with the seal member 4 to be in a sealed state, and the outer peripheral surface of the pipe 1 is prevented from coming off. Hang on. In this way, the operator can clearly confirm that the tightening (insertion) of the pipe 1 has been completed by the sound of the expansion piece 6 coming off.
【００３１】以上のように接続された状態では、締付環
体５によって、パイプ１が縮径して挿入筒部３（段付き
部22）に食い込むため、パイプ１は継手本体２に抜け止
め状態に掛止されており、かつ、シール部材４によっ
て、パイプ１の内面全周にわたって途切れることなく密
封性が確保されるため、パイプ１の径のばらつきや熱変
形等による寸法変化があっても、常に、すぐれた止水性
能を維持することができ、長期にわたり安定したシール
性を確保することができる。なお、この場合、カバー14
によってパイプ１の接続部が保護されるため、耐久性が
向上し、シール性を長期にわたりより安定に確保できる
利点がある。In the above-mentioned connected state, the pipe 1 is reduced in diameter by the tightening ring body 5 and bites into the insertion tube portion 3 (stepped portion 22), so that the pipe 1 is prevented from coming off from the joint body 2. In this state, the sealing member 4 ensures the sealing performance without interruption over the entire inner surface of the pipe 1, so that even if the pipe 1 has a variation in diameter or a dimensional change due to thermal deformation or the like. Always, it is possible to maintain excellent water stopping performance and to secure stable sealing performance for a long period of time. In this case, the cover 14
Since the connection portion of the pipe 1 is protected by this, there is an advantage that the durability is improved and the sealing property can be secured more stably for a long period of time.
【００３２】また、その接続作業は、継手本体２に対し
て、パイプ１を押し込むだけでよく、接続工具や、締結
部材を要することなく、また、熟練を要さずに、きわめ
て能率よく、いわゆるワンタッチ動作で接続作業を完了
することができ、かつその接続作業の完了を、拡径片６
の離脱音によって外部から明確に確認することができる
ため、現場での施工作業性が著しく向上する。また、各
構成部材が、予め、一体的に組付けられているため、部
品の管理が容易となり、かつ、現場での調達も容易かつ
確実なものとなり、部品の紛失のおそれも少ない。Further, the connecting work is performed by simply pushing the pipe 1 into the joint body 2, without using a connecting tool or a fastening member, and without requiring any skill, it is very efficient, so-called. The connection work can be completed by one-touch operation, and the completion of the connection work is performed by the diameter expansion piece 6
Since it can be clearly confirmed from the outside by the detachment sound of, the workability at the site is significantly improved. Further, since the respective constituent members are integrally assembled in advance, the management of the parts becomes easy, and the on-site procurement becomes easy and reliable, and the risk of losing the parts is small.
【００３３】次に、図12に、接続完了後のパイプ１に引
き抜き力が発生した場合のパイプ１と抜け止めリング８
との作用説明図を示す。即ち、図12（Ａ）に示すよう
に、パイプ１が挿入筒部３から抜ける方向に引っ張られ
た場合、パイプ１の端部は締付環体５により絞り込まれ
ている（締め付けられている）ため、パイプ１の端部
は、その内周面が挿入筒部３の段付き部22に引っ掛かる
と共にその内周面と挿入筒部３の外周面との摩擦抵抗に
より、引抜き方向に移動し難くなる。Next, FIG. 12 shows the pipe 1 and the retaining ring 8 when a pulling force is generated in the pipe 1 after the connection is completed.
The action explanatory drawing with and is shown. That is, as shown in FIG. 12 (A), when the pipe 1 is pulled in the direction of coming out of the insertion tube portion 3, the end portion of the pipe 1 is narrowed (tightened) by the tightening ring body 5. Therefore, the end portion of the pipe 1 is difficult to move in the pulling direction due to the friction between the inner peripheral surface of the end portion of the pipe 1 and the outer peripheral surface of the insertion cylindrical portion 3 as the inner peripheral surface thereof is caught by the stepped portion 22 of the insertion cylindrical portion 3. Become.
【００３４】そして、そのパイプ１の端部の移動が発生
するより先に、締付環体５に締め付けられていないパイ
プ１の部位───図12において、締付環体５より（軸心
方向）左側のパイプ１の部位───が（変形により）伸
び始め、図12（Ｂ）に示すように、このパイプ１の伸び
により、折り曲げられて（角度をつけて）パイプ１に接
触している抜け止めリング８の歯部12は、パイプ１に追
従して、その折り曲げを水平状となるように揺動し（角
度が元に戻る方向に起き上がり）、図12（Ｃ）に示すよ
うに、袋ナット10の内鍔部の壁面に当接するまで揺動す
る。Before the movement of the end of the pipe 1 occurs, the portion of the pipe 1 that is not fastened to the fastening ring body 5 in FIG. (Direction) The part of the pipe 1 on the left side begins to expand (due to the deformation), and as shown in FIG. 12B, the expansion of the pipe 1 causes the pipe 1 to be bent (at an angle) and come into contact with the pipe 1. The tooth portion 12 of the retaining ring 8 that follows the pipe 1 swings so that its bending becomes horizontal (raised in the direction in which the angle returns to its original position), as shown in FIG. 12 (C). Then, the cap nut 10 is rocked until it comes into contact with the wall surface of the inner flange portion.
【００３５】従って、抜け止めリング８の歯部12は、角
度が元に戻る方向に起き上がりながら、パイプ１を絞り
込んでいくため、パイプ１に引き抜き力がかかれば、一
層強い締付力が作用し、強固な抜け止めとなる。なお、
この際、挿入筒部３の外周面の凹部21に、歯部12…によ
り絞り込まれたパイプ１の内周側が掛止されることで、
パイプ１の引き抜けが一層阻止される。Therefore, the tooth portion 12 of the retaining ring 8 narrows down the pipe 1 while rising in the direction in which the angle returns to its original position. Therefore, if a pulling force is applied to the pipe 1, a stronger tightening force acts. , Will be a strong retainer. In addition,
At this time, the inner peripheral side of the pipe 1 narrowed by the tooth portions 12 is hooked in the concave portion 21 on the outer peripheral surface of the insertion tubular portion 3,
The withdrawal of the pipe 1 is further prevented.
【００３６】また、（図３と図４に示すように）歯部12
…が（打ち抜きでなく）切り込みにより形成され、隣り
合う歯部12，12の隙間が小さく設定されているため、
（図14に示す）従来の抜け止めリングに比べ、歯部12…
とパイプ１との接触面積が大きくなると共に接触面圧が
小さくなり、歯部12…のパイプ１の外周面への食いつき
が軽減され、パイプ１の歯部12による損傷を抑制でき、
パイプ１の切断の事故が防止できる。さらに、歯部12に
掛かる負担が軽減し、歯部12の逆折れや、歯部12による
パイプ１の外皮を削ってのパイプ１の抜けが、抑制され
る。Also, the tooth portion 12 (as shown in FIGS. 3 and 4)
... are formed by notches (not punching), and the gap between adjacent tooth portions 12, 12 is set small,
Compared to the conventional retaining ring (shown in Fig. 14), tooth 12 ...
The contact surface pressure between the pipe 1 and the pipe 1 becomes large, the contact surface pressure becomes small, the biting of the teeth 12 on the outer peripheral surface of the pipe 1 is reduced, and the damage by the teeth 12 of the pipe 1 can be suppressed.
Accidents of cutting the pipe 1 can be prevented. Further, the load applied to the tooth portion 12 is reduced, and the reverse bending of the tooth portion 12 and the dropout of the pipe 1 by scraping the outer skin of the pipe 1 by the tooth portion 12 are suppressed.
【００３７】なお、本発明は上述の実施の形態に限定さ
れず、図示省略するが、挿入筒部３の外周面には、例え
ば、複数段のテーパー面や周状段部を形成して、パイプ
１の抜け止めをより確実なものとするも好ましい。ま
た、締付環体５の内周面に、パイプ１の外周面を掛止す
るローレット状等の凹凸状又はテーパー状等の抜止掛止
部を形成してもよい。さらに、締付環体５、拡径片６、
抜け止めリング８の形状は、本発明の要旨を逸脱しない
範囲で設計変更可能である。The present invention is not limited to the above-described embodiment, and although not shown, the outer peripheral surface of the insertion tube portion 3 is formed with, for example, a plurality of tapered surfaces or circumferential step portions, It is also preferable to prevent the pipe 1 from coming off more reliably. In addition, an inner surface of the tightening ring body 5 may be formed with a retaining hook portion such as a knurled concave-convex shape or a tapered shape that locks the outer peripheral surface of the pipe 1. Further, the tightening ring body 5, the expanding piece 6,
The shape of the retaining ring 8 can be changed in design without departing from the scope of the present invention.
【００３８】[0038]
【発明の効果】本発明は、上述の如く構成されているの
で、次に記載する効果を奏する。Since the present invention is configured as described above, it has the following effects.
【００３９】（請求項１によれば）抜け止めリング８の
内周側には、周方向に等間隔に切り込み形成された複数
個の歯部12…が設けられているため、隣り合う歯部12，
12の隙間を小さく設定でき、歯部12…とパイプ１との接
触面積が増大し、歯部12…がパイプ１の周方向全般に渡
って掛止し、抜け止めが一層強固となる。また、歯部12
…とパイプ１との接触面圧が減少し、歯部12…のパイプ
１の外周面への食いつきが軽減され、パイプ１の歯部12
による損傷を抑制でき、パイプ１の切断の事故が防止で
きる。さらに、歯部12に掛かる負担が軽減し、歯部12の
逆折れや、歯部12によるパイプ１の外皮を削ってのパイ
プ１の抜けが、抑制される。このように、簡単な構造に
て、一層強固なパイプ１の抜け止めを発揮する。 On the inner peripheral side of the retaining ring 8 (according to claim 1), a plurality of tooth portions 12 formed by cutting at equal intervals in the circumferential direction are provided. 12,
The gap between the teeth 12 can be set to be small, the contact area between the teeth 12 ... And the pipe 1 is increased, the teeth 12 are hooked over the entire circumferential direction of the pipe 1, and the retaining is further strengthened. Also, tooth 12
The contact surface pressure between the pipe 1 and the tooth 1 is reduced, the biting of the tooth portion 12 on the outer peripheral surface of the pipe 1 is reduced, and the tooth portion 12 of the pipe 1 is reduced.
It is possible to suppress the damage due to, and prevent the accident of cutting the pipe 1. Further, the load applied to the tooth portion 12 is reduced, and the reverse bending of the tooth portion 12 and the dropout of the pipe 1 by scraping the outer skin of the pipe 1 by the tooth portion 12 are suppressed. In this way, with a simple structure, stronger retaining of the pipe 1 is prevented .
【００４０】また、パイプ１を押し込むワンタッチ動作
により、拡径片６が、締付環体５のスリット51から離脱
すると共に、締付環体５が縮径して、パイプ１の端部を
締め付け、パイプ１の内面がシール部材４に密接して密
封状態となり、接続作業を完了することができる。 Further, the one-touch operation of pushing the pipe 1, diameter-expansion piece 6, with detached from the slit 51 of the clamping ring body 5, the ring body 5 tightening is reduced in diameter, fastening the ends of the pipe 1 The inner surface of the pipe 1 comes into close contact with the seal member 4 to be in a sealed state, and the connection work can be completed.
【００４１】その接続状態では、シール部材４によっ
て、パイプ１の内面が密封状態に保持されるため、パイ
プ１の径のばらつきや熱変形等による寸法変化があって
も、常に、すぐれた止水性能を維持することができ、長
期にわたり安定したシール性を保持することができる。In the connected state, the inner surface of the pipe 1 is kept in a sealed state by the sealing member 4, so that even if the diameter of the pipe 1 is changed or the dimension is changed due to thermal deformation, the water is always excellent. The performance can be maintained and stable sealing property can be maintained for a long period of time.
【００４２】その接続作業は、パイプ１を押し込むだけ
でよく、接続工具や、締結部材を要することなく、ま
た、熟練を要さずに、きわめて能率よく、いわゆるワン
タッチ動作で接続作業を完了することができ、現場での
施工作業性が著しく向上する。また、各構成部材が、予
め、一体的に組付けられているため、部品の管理が容易
となり、かつ、現場での調達が容易かつ確実なものとな
り、部品の紛失のおそれも少ない。The connecting work can be accomplished simply by pushing in the pipe 1, without using a connecting tool or a fastening member, and without requiring skill, so that the connecting work can be completed by a so-called one-touch operation. The workability at the site is significantly improved. Further, since the respective constituent members are integrally assembled in advance, the management of the parts is facilitated, the on-site procurement is facilitated and reliable, and the risk of the parts being lost is small.
【００４３】（請求項２によれば）挿入筒部３の外周面
には、抜け止めリング８の歯部12…と対応する部位に、
凹部21が設けられているため、歯部12…にて締め付けら
れたパイプ１が、凹部21に掛止可能となるため、一層強
固な抜け止めとなる。On the outer peripheral surface of the insertion tube portion 3 (according to claim 2 ), a portion corresponding to the tooth portions 12 of the retaining ring 8 is provided,
Since the concave portion 21 is provided, the pipe 1 tightened by the tooth portions 12 can be hooked in the concave portion 21, so that the pipe 1 is more firmly prevented from coming off.
【図１】本発明の管継手の実施の一形態を示す正面断面
図である。FIG. 1 is a front sectional view showing an embodiment of a pipe joint of the present invention.
【図２】パイプを管継手に挿入した状態の正面断面図で
ある。FIG. 2 is a front cross-sectional view of a pipe inserted into a pipe joint.
【図３】形成途中の抜け止めリングの側面図と正面断面
図である。3A and 3B are a side view and a front sectional view of a retaining ring during formation.
【図４】抜け止めリングの側面断面図である。FIG. 4 is a side sectional view of a retaining ring.
【図５】締付環体の側面図と要部拡大図である。FIG. 5 is a side view of a tightening ring body and an enlarged view of a main part.
【図６】図５（Ａ）のＸ−Ｘ線矢視断面図である。FIG. 6 is a sectional view taken along line XX of FIG.
【図７】拡径片が圧入された状態の締付環体の側面図と
要部拡大図である。FIG. 7 is a side view and an enlarged view of a main part of the tightening ring body in a state where the expanded diameter piece is press-fitted.
【図８】図７（Ａ）のＹ−Ｙ線矢視断面図である。8 is a cross-sectional view taken along the line YY of FIG. 7 (A).
【図９】拡径片の斜視図である。FIG. 9 is a perspective view of a diameter expansion piece.
【図10】拡径片の正面図と側面図である。FIG. 10 is a front view and a side view of the expanded diameter piece.
【図11】拡径片とパイプの作用説明図である。FIG. 11 is an explanatory view of the action of the expanded diameter piece and the pipe.
【図12】抜け止めリングとパイプの作用説明図である。FIG. 12 is an explanatory view of the action of the retaining ring and the pipe.
【図13】従来の管継手の分解組付け説明図である。FIG. 13 is an exploded view of a conventional pipe joint.
【図14】従来の抜け止めリングの側面図である。FIG. 14 is a side view of a conventional retaining ring.
１ パイプ ２ 継手本体 ３ 挿入筒部 ４ シール部材 ５ 締付環体 ６ 拡径片 ７ 凹周溝 ８ 抜け止めリング 12 歯部 21 凹部 51 スリット 1 pipe 2 Joint body 3 Insert tube 4 Seal member 5 Tightening ring 6 Expanding piece 7 concave groove 8 retaining ring 12 teeth 21 recess 51 slits
───────────────────────────────────────────────────── フロントページの続き (72)発明者 保田 秋生 大阪府河内長野市菊水町８−22 東尾メ ック株式会社内 (56)参考文献 特開 平10−19176（ＪＰ，Ａ) 特開 平７−224978（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) F16L 21/08 F16L 19/08 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akio Yasuda 8-22 Kikusuicho, Kawachinagano-shi, Osaka Prefecture Higashio Mech Co., Ltd. (56) References JP 10-19176 (JP, A) JP H 7-224978 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB name) F16L 21/08 F16L 19/08
Claims (2)
挿入筒部３を有する継手本体２と、上記挿入筒部３の凹
周溝７に装着されるシール部材４と、上記挿入筒部３に
外嵌された上記パイプ１の端部を弾発的な締め付け力で
締め付けるためのスリット51付きの締付環体５と、該締
付環体５の弾発力に抗して該締付環体５を拡径するよう
に上記スリット51の端部に離脱可能に挾持されて、挿入
される上記パイプ１の先端部に当接して離脱する拡径片
６と、被接続用のパイプ１の端部に挿入される挿入筒部
３を有する継手本体２と、上記挿入筒部３に外嵌された
上記パイプ１の外周面に抜け止め状態に内周側が掛止す
る抜け止めリング８と、を具備し、該抜け止めリング８
の内周側には、周方向に等間隔に切り込み形成された複
数個の歯部12…が設けられたことを特徴とする管継手。1. A joint body 2 having an insertion tube portion 3 to be inserted into an end portion of a pipe 1 to be connected, and a recess of the insertion tube portion 3.
The seal member 4 mounted in the circumferential groove 7 and the insertion tube portion 3
With the elastic tightening force on the outer end of the pipe 1
A tightening ring 5 with a slit 51 for tightening, and the tightening ring 5.
Enlarge the diameter of the tightening ring 5 against the elastic force of the ring 5.
Inserted by being detachably held by the end of the slit 51.
Expanding piece that comes into contact with the tip of the pipe 1 and is removed
6 and an insertion tube part to be inserted into the end part of the pipe 1 to be connected
3 and a retaining ring 8 that is retained by the inner peripheral side of the outer peripheral surface of the pipe 1 fitted onto the insertion tube portion 3 in a retaining state.
A plurality of tooth portions 12 formed by cutting at equal intervals in the circumferential direction are provided on the inner peripheral side of the pipe joint.
グ８の歯部12…と対応する部位に、凹部21が設けられた
請求項１記載の管継手。2. A retaining ring is provided on the outer peripheral surface of the insertion tube portion 3.
The concave portion 21 is provided in a portion corresponding to the tooth portion 12 of the gear 8.
The pipe joint according to claim 1 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000210390A JP3411546B2 (en) | 2000-07-11 | 2000-07-11 | Pipe fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000210390A JP3411546B2 (en) | 2000-07-11 | 2000-07-11 | Pipe fitting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002031282A JP2002031282A (en) | 2002-01-31 |
| JP3411546B2 true JP3411546B2 (en) | 2003-06-03 |
Family
ID=18706664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000210390A Expired - Lifetime JP3411546B2 (en) | 2000-07-11 | 2000-07-11 | Pipe fitting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3411546B2 (en) |
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| JP2011132981A (en) * | 2009-12-22 | 2011-07-07 | Kitz Corp | Easy release joint for resin pipe |
| JP2012077804A (en) * | 2010-09-30 | 2012-04-19 | Sekisui Chem Co Ltd | Pipe joint |
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| JP2012077804A (en) * | 2010-09-30 | 2012-04-19 | Sekisui Chem Co Ltd | Pipe joint |
| WO2012128152A1 (en) | 2011-03-22 | 2012-09-27 | 井上スダレ株式会社 | Pipe joint |
| KR20150011791A (en) | 2012-05-11 | 2015-02-02 | 히가시오 멕 가부시키가이샤 | Pipe joint |
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|---|---|
| JP2002031282A (en) | 2002-01-31 |
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