JP2547236B2 - Pipe fitting - Google Patents

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は水道管，ガス管等の配管に使用される管継手
に関する。TECHNICAL FIELD The present invention relates to a pipe joint used for piping such as a water pipe and a gas pipe.

（従来の技術） 水道管などの配管に使用される管継手として，近時，
接続すべき管を挿入するだけで，該接続管を固定し得る
差し込み式の管継手が開発されている。このような差し
込み式の管継手は，接続管の端部を容易に挿入すること
ができると共に，挿入された接続管の端部が容易に抜け
ないことが必要である。このため，差し込み式の管継手
では，通常，特公昭54−21905号公報，特公昭55−25317
号公報等に開示されているように，筒状の継手本体内に
接続管を固定するための割りリングが設けられている。
該割りリングは，周方向の一部が切り取られており，縮
径及び拡径が可能である。該割りリングは，接続管の端
部に外嵌されていない状態では，接続管よりも若干小径
となっており，接続管が継手本体内に挿入された際に，
該接続管が割りリング内に挿入される。該割りリングは
接続管が挿入されることにより拡径し，接続管外周面に
密着状態で外嵌される。接続管が継手本体内から抜けよ
うとする場合には，割りリングは継手本体内周面におけ
るテーパ部に当接して，縮径され，接続管に係止され
る。(Prior art) Recently, as a pipe joint used for piping such as water pipes,
Plug-in type pipe joints have been developed which can fix the connecting pipe by simply inserting the pipe to be connected. In such a plug-in type pipe joint, it is necessary that the end of the connecting pipe can be easily inserted and the end of the inserted connecting pipe cannot be easily pulled out. For this reason, plug-in type pipe joints are normally used in Japanese Patent Publication No. Sho 21-21905 and Japanese Examined Patent Publication No. 55-25317.
As disclosed in Japanese Unexamined Patent Publication (Kokai), etc., a split ring for fixing the connecting pipe is provided in the tubular joint body.
A part of the split ring in the circumferential direction is cut out so that the split ring can be reduced in diameter and expanded in diameter. The split ring has a diameter slightly smaller than that of the connecting pipe when not externally fitted to the end of the connecting pipe, and when the connecting pipe is inserted into the joint body,
The connecting pipe is inserted into the split ring. The split ring expands in diameter when the connecting pipe is inserted, and is fitted onto the outer peripheral surface of the connecting pipe in a close contact state. When the connecting pipe tries to come out from the inside of the joint body, the split ring comes into contact with the tapered portion on the inner peripheral surface of the joint body, is reduced in diameter, and is locked to the connecting pipe.

（発明が解決しようとする課題） このような従来の管継手では，割りリングと接続管と
の係止力を増加するために，接続管外周面に喰い込む凹
凸状の係止部を割りリング内周面に設けることが行われ
る。この場合，該係止部が接続管外周面に係止する際
に，該係止部が接続管外周面を切削してしまうおそれが
ある。接続管には，継手本体から抜けようとする力が，
常時，加わるため，接続管と割りリングとが相互に移動
し，該係止部が接続管外周面を切削する可能性が大き
い。前述のように，割りリングが鋼製で，接続管が合成
樹脂製の場合には，割りリングの係止部が接続管を切削
する可能性が一層大きくなる。このように接続管外周面
が割りリングにて切削されると，その切削屑が接続管内
に入り込む。接続管が水道配管として使用される場合に
は、このような切削屑が上水内に混入することになる。
接続管内を通流する水の圧力が脈動すれば，接続管外周
面に割りリングにて一層切削される。(Problems to be Solved by the Invention) In such a conventional pipe joint, in order to increase the locking force between the split ring and the connecting pipe, the split ring is provided with a concave-convex locking portion that bites into the outer peripheral surface of the connecting pipe. It is provided on the inner peripheral surface. In this case, when the locking portion locks on the outer peripheral surface of the connecting pipe, the locking portion may cut the outer peripheral surface of the connecting pipe. The force to pull out from the joint body is
Since the connecting pipe and the split ring are constantly added, the connecting pipe and the split ring are likely to move with each other, and the locking portion may cut the outer peripheral surface of the connecting pipe. As described above, when the split ring is made of steel and the connecting pipe is made of synthetic resin, the locking portion of the split ring is more likely to cut the connecting pipe. Thus, when the outer peripheral surface of the connecting pipe is cut by the split ring, the cutting chips enter the connecting pipe. When the connecting pipe is used as a water pipe, such cutting chips are mixed in the clean water.
If the pressure of the water flowing through the connecting pipe pulsates, it is further cut by the split ring on the outer peripheral surface of the connecting pipe.

本発明は，上記従来の問題を解決するものであり，そ
の目的は，接続管外周面から切削屑が生じる場合にも該
切削屑が接続管内に侵入するおそれのない管継手を提供
することにある。The present invention solves the above-mentioned conventional problems, and an object thereof is to provide a pipe joint in which the cutting waste does not enter the connecting pipe even when the cutting waste is generated from the outer peripheral surface of the connecting pipe. is there.

（課題を解決するための手段） 本発明の管継手は，一端の開口部から接続管の端部が
挿入される筒状であって，その内周側部分には，該開口
部側になるに連れて徐々に小径となるように縮径したテ
ーパ部を有する凹溝が設けられた継手本体と，該継手本
体の凹溝内に配設されており，該継手本体内に挿入され
る接続管に外嵌し得る円環状または円筒状で，かつ，該
凹溝のテーパ部に当接することにより接続管外周面に係
止する係止部を有する抜け止め部材と，該抜け止めリン
グよりも前記継手本体の内奥側に配設され，該継手本体
と該継手本体内に挿入された接続管との間に介装される
透水性のフィルター部材と，を具備してなり，そのこと
により上記目的が達成される。(Means for Solving the Problem) The pipe joint of the present invention has a tubular shape in which the end portion of the connecting pipe is inserted from the opening portion at one end, and the inner peripheral side portion thereof becomes the opening portion side. And a joint body provided with a concave groove having a taper portion whose diameter is gradually reduced along with the joint body, and a connection which is arranged in the concave groove of the joint body and is inserted into the joint body. A retaining member having an annular shape or a cylindrical shape that can be externally fitted to the pipe and having a retaining portion that engages with the outer peripheral surface of the connecting pipe by contacting the tapered portion of the recessed groove, and the retaining ring And a water-permeable filter member disposed inside the joint body and interposed between the joint body and a connecting pipe inserted into the joint body. The above object is achieved.

（実施例） 以下に本発明を実施例について説明する。(Example) Hereinafter, the present invention will be described with reference to Examples.

本発明の管継手は，第１図に示すように，接続管40の
端部に外嵌される筒状の継手本体10と，該継手本体10内
に配設されたシール材20と，同じく継手本体10内に配設
された抜け止めリング31およびフィルター部材50とを有
する。As shown in FIG. 1, the pipe joint of the present invention includes a tubular joint body 10 that is externally fitted to an end portion of a connecting pipe 40, a sealing material 20 disposed in the joint body 10, It has a retaining ring (31) and a filter member (50) arranged in the joint body (10).

本発明の管継手１における継手本体10は，一端部に，
接続管40が挿入される開口部11を有し，該開口部11の近
傍部内周面には，環状のシール材用凹溝12が設けられて
いる。該シール材用凹溝12は，開口部11側が深く，内奥
側が浅い構造となっており，該シール材用凹溝12内に
は，例えばゴム製のシール材20が嵌入されて固定されて
いる。該シール材20は，継手本体10内に挿入される接続
管40の端部外周面に密着し，該接続管40外周面と継手本
体10内周面とを液密にシールする。The joint body 10 in the pipe joint 1 of the present invention has one end
An opening 11 into which the connecting pipe 40 is inserted is provided, and an annular groove 12 for a sealing material is provided on the inner peripheral surface in the vicinity of the opening 11. The groove 12 for the sealing material has a structure in which the opening 11 side is deep and the inner rear side is shallow. For example, a rubber sealing material 20 is fitted and fixed in the groove 12 for the sealing material. There is. The sealing material 20 is in close contact with the outer peripheral surface of the end portion of the connecting pipe 40 inserted into the joint body 10 and liquid-tightly seals the outer peripheral surface of the connecting pipe 40 and the inner peripheral surface of the joint body 10.

継手本体10における該シール材用凹溝12よりも継手本
体10の軸方向内奥側の内周面には，抜け止めリング用凹
溝13が設けられている。該抜け止めリング用凹溝13内に
は，抜け止めリング31が嵌入されている。また，該抜け
止めリング用凹溝13のさらに軸方向内奥側の内周面に
は，フィルター部材用凹溝14が設けられており，該フィ
ルター部材用凹溝14内にフィルター部材50が嵌入されて
いる。A recess 13 for a retaining ring is provided on the inner peripheral surface of the joint body 10 on the inner side in the axial direction with respect to the groove 12 for seal material. A retaining ring 31 is fitted in the retaining ring concave groove 13. Further, a filter member groove 14 is provided on the inner peripheral surface further axially inward of the retaining ring groove 13, and the filter member 50 is fitted into the filter member groove 14. Has been done.

抜け止めリング31は，例えば鋼等により周方向の一部
が切り取られた環状に形成されている。該抜け止めリン
グ31は，断面略円形状をしている。該抜け止めリング31
の内径は，継手本体10内に挿入される接続管40の外径よ
り若干小径であり，該抜け止めリング31内に接続管40が
挿入されると，該抜け止めリング31が拡径して，該接続
管40外周面に密着される。The retaining ring 31 is formed in an annular shape, for example, made of steel or the like and is partially cut off in the circumferential direction. The retaining ring 31 has a substantially circular cross section. The retaining ring 31
The inner diameter of is slightly smaller than the outer diameter of the connecting pipe 40 inserted into the joint body 10, and when the connecting pipe 40 is inserted into the retaining ring 31, the retaining ring 31 expands in diameter. , Is closely attached to the outer peripheral surface of the connecting pipe 40.

抜け止めリング31における継手本体10の内奥側の内周
側部分には，階段状に切欠された係止部分31aが全周に
わたって形成されている。係止部31aは，例えば，接続
管40外周面とは平行な２面を有するように切欠されてい
て、３つの角部が形成されている。An inner peripheral portion of the retaining ring 31 on the inner rear side of the joint body 10 is formed with a stepped notch engaging portion 31a over the entire circumference. The locking portion 31a is cut out so as to have, for example, two surfaces parallel to the outer peripheral surface of the connecting pipe 40, and three corner portions are formed.

抜け止めリング31が嵌入された抜け止めリング用凹溝
13は，継手本体10内奥側部分に，該抜け止めリング31よ
り若干大きい空間部を有する。該抜け止めリング用凹溝
13の継手本体10内奥側の側面13bは，継手本体10の軸心
に対して略直交状態となっている。該抜け止めリング用
設溝13は，継手本体10の開口部11側に，該開口部11側に
なるに連れて徐々に小径となるように縮径したテーパ部
13aを有する。Groove for retaining ring with retaining ring 31
Reference numeral 13 has a space portion, which is slightly larger than the retaining ring 31, in the inner portion of the joint body 10. The groove for the retaining ring
The inner side surface 13b of the joint body 10 of 13 is substantially orthogonal to the axis of the joint body 10. The retaining ring groove 13 is formed on the side of the opening 11 of the joint body 10 and has a taper portion that is gradually reduced in diameter toward the opening 11 side.
Have 13a.

継手本体10の抜け止めリング用凹溝13よりもさらに継
手本体10内奥側部分には，フィルター部材用凹溝14が設
けられており，該フィルター部材用凹溝14内に，環状の
フィルター部材50が嵌入されている。該フィルター部材
50は，透水性かつ弾性を有し，該継手本体10内に挿入さ
れる接続管４の外周面に外嵌して該接続管40外周面に密
着する。従って，該フィルター部材50は，継手本体10内
周面と接続管40外周面との間に，上水等の水を通過さ
せ，その水内の異物は通過させない。A groove 14 for a filter member is provided further inside the joint body 10 than the groove 13 for the retaining ring of the joint body 10, and an annular filter member is provided in the groove 14 for the filter member. 50 is inserted. The filter member
The reference numeral 50 has water permeability and elasticity, and is fitted onto the outer peripheral surface of the connecting pipe 4 inserted into the joint body 10 to be in close contact with the outer peripheral surface of the connecting pipe 40. Therefore, the filter member 50 allows water such as tap water to pass between the inner peripheral surface of the joint body 10 and the outer peripheral surface of the connection pipe 40, and does not allow foreign matter in the water to pass therethrough.

このように，管継手１は，継手本体10の抜け止めリン
グ用凹溝13内に，抜け止めリング31が嵌入され，かつシ
ール材用凹溝12内にシール材20,フィルター部材用凹溝1
4内にフィルター部材50それそれ嵌入されて，それぞれ
が固定的に配設されている。そして，該継手本体10の開
口部11から接続管40が挿入されると，該接続管40の先端
部は，抜け止めリング31内に挿入される。接続管40に挿
入された抜け止めリング31は，拡径状態となって接続管
40外周面に密着される。接続管40がさらに継手本体10内
に挿入されると，抜け止めリング31は，接続管40と一体
的に平行移動し，該抜け止めリング31は，抜け止めリン
グ用凹溝13の継手本体10内奥側側面13bに当接する。こ
のような状態で，接続管40はさらに継手本体10の内奥側
へ挿入されるが，このとき，抜け止めリング用凹溝13の
該側面13bは，継手本体10の軸心に略直交する状態とな
っているため，該側面13bからは継手本体10の軸方向へ
の力が抜け止めリング31に作用し，抜け止めリング31
は，第２図に示すように，該側面13bに当接した状態で
停止する。As described above, in the pipe joint 1, the retaining ring 31 is fitted in the retaining ring recess groove 13 of the joint body 10, and the sealing member 20 and the filter member recess groove 1 are disposed in the sealing member recess groove 12.
The filter members 50 are fitted in the respective 4 and fixedly arranged. When the connecting pipe 40 is inserted from the opening 11 of the joint body 10, the tip of the connecting pipe 40 is inserted into the retaining ring 31. The retaining ring 31 inserted in the connecting pipe 40 is in the expanded state, and
40 Closely attached to the outer peripheral surface. When the connecting pipe 40 is further inserted into the joint main body 10, the retaining ring 31 moves in parallel with the connecting pipe 40, and the retaining ring 31 is connected to the joint body 10 of the retaining ring recess groove 13. It abuts on the inner side surface 13b. In this state, the connection pipe 40 is further inserted into the inner side of the joint body 10, and at this time, the side surface 13b of the retaining ring groove 13 is substantially orthogonal to the axis of the joint body 10. Since the state is in the state, the axial force of the joint body 10 acts on the retaining ring 31 from the side surface 13b, and the retaining ring 31
Stops as abutting against the side surface 13b, as shown in FIG.

このような状態で，さらに接続管40が継手本体10の内
奥側へ挿入されると，該接続管40の先端部は，内奥側に
設けられたフィルター部材50内に挿入される。該フィル
ター部材50は，接続管40外周面に密着する。接続管40
は，継手本体10内に所定の長さまで挿入される。When the connecting pipe 40 is further inserted into the inner side of the joint body 10 in such a state, the tip of the connecting pipe 40 is inserted into the filter member 50 provided on the inner side. The filter member 50 is in close contact with the outer peripheral surface of the connecting pipe 40. Connection pipe 40
Is inserted into the joint body 10 to a predetermined length.

このような状態で，管継手１および接続管40内に，例
えば上水が，継手本体10の内奥部側から通流される。こ
れにより，接続管40には，継手本体10から抜けようとす
る方向に力が加わり，接続管40は，継手本体10から抜け
る方向へ移動する。この移動に伴い，継手本体10内の接
続管40に外嵌された抜け止めリング31は，該接続管40と
一体的に平行移動する。そして，継手本体10内の抜け止
めリング31が，抜け止めリング用凹溝13のテーパ部13a
に当接する。このような状態で，接続管40がさらに継手
本体10から抜ける方向へ移動すると，抜け止めリング31
には，抜け止めリング洋凹溝13のテーパ部13aからの反
力が加わり，該テーパ部13aに沿った力が加わる。これ
により，抜け止めリング31には，第２図に矢印Ａで示す
方向へのねじれ力が作用し，第２図に二点鎖線で示すよ
うに，該抜け止めリング31の係止部31aが接続管40外周
面に係止される。このような状態でさら接続管40が継手
本体10から抜ける方向へ移動すると，抜け止めリング31
は抜け止めリング用凹溝13のテーパ部13aに押圧され
て，その係止部31aは接続管40外周面に喰い込む。これ
により，接続管40が継手本体10から抜けようとする方向
への移動が停止される。In such a state, clean water, for example, flows into the pipe joint 1 and the connection pipe 40 from the inner back side of the joint body 10. As a result, a force is applied to the connecting pipe 40 in a direction in which the connecting pipe 40 tends to come out of the joint body 10, and the connecting pipe 40 moves in a direction in which it comes out of the joint body 10. With this movement, the retaining ring 31 fitted on the connection pipe 40 in the joint body 10 moves in parallel with the connection pipe 40. The retaining ring 31 in the joint body 10 is attached to the tapered portion 13a of the retaining ring recess groove 13.
Abut. In this state, when the connecting pipe 40 moves further in the direction of coming out of the joint body 10, the retaining ring 31
Is applied with a reaction force from the taper portion 13a of the retaining ring recess 13 and a force along the taper portion 13a. As a result, a twisting force acts in the direction indicated by the arrow A in FIG. 2 on the retaining ring 31, and the locking portion 31a of the retaining ring 31 is locked as indicated by the chain double-dashed line in FIG. It is locked to the outer peripheral surface of the connecting pipe 40. In this state, when the connecting pipe 40 moves in the direction of coming off the joint body 10, the retaining ring 31
The stopper portion 31a is pressed by the tapered portion 13a of the retaining ring concave groove 13, and the locking portion 31a bites into the outer peripheral surface of the connecting pipe 40. As a result, the movement of the connecting pipe 40 in the direction in which it is trying to come out of the joint body 10 is stopped.

このとき，継手本体10における抜け止めリング31の内
奥側に配設された透水性のフィルター部材50を，上水の
一部が透過し，継手本体10の抜け止めリング用凹溝13内
に上水が流入する。抜け止めリング用凹溝13内に流入し
た上水は，抜け止めリング31を該抜け止めリング用凹溝
13のテーパ部13aに押付ける作用をする。また，同時
に，接続管40の内側と外側との圧力を等しくして，該接
続管40が破損することを防止する。At this time, part of the clean water permeates through the water-permeable filter member 50 disposed on the inner side of the retaining ring 31 in the joint body 10 and enters the retaining ring recess groove 13 of the joint body 10. Clean water flows in. The clean water that has flowed into the retaining ring concave groove 13 moves the retaining ring 31 into the retaining ring concave groove.
It acts to press against the taper portion 13a of 13. At the same time, the pressure inside and outside the connecting pipe 40 is made equal to prevent the connecting pipe 40 from being damaged.

抜け止めリング31の係止部31aが接続管40に係止する
際に，該係止部31aは接続管40外周面を切削するおそれ
がある。また，接続管40に，上水からさらに高圧が印加
されると，接続管40は継手本体10から抜けようと移動す
る。このとき，抜け止めリング31は，抜け止めリング用
凹溝13のテーパ部13aにさらに押付けられるため，該抜
け止めリング31の係止部31aが接続管40の外周面にさら
に喰い込む。この食い込み時に，抜け止めリング31の係
止部31は，接続管40の外周面を切削し，その切削屑が継
手本体10と接続管40との間に生じることがある。しかし
ながら，このような切削屑は，継手本体10内周面と接続
管40外周面との間に介装されたフィルター部材50とシー
ル材20との間に閉じ込められ，その間隙から流出するお
それがない。従って，抜け止めリング31の係止部31が接
続管40外周面に係止した場合に，たとえ切削屑が生じて
も，該切削屑は，接続管40内を通流する上水に混入する
おそれがない。When the locking portion 31a of the retaining ring 31 is locked to the connecting pipe 40, the locking portion 31a may cut the outer peripheral surface of the connecting pipe 40. Further, when a higher pressure is applied to the connecting pipe 40 from the clean water, the connecting pipe 40 moves so as to come out of the joint body 10. At this time, the retaining ring 31 is further pressed against the tapered portion 13a of the retaining ring concave groove 13, so that the locking portion 31a of the retaining ring 31 further digs into the outer peripheral surface of the connecting pipe 40. At the time of this bite, the locking portion 31 of the retaining ring 31 cuts the outer peripheral surface of the connecting pipe 40, and cutting chips may be generated between the joint body 10 and the connecting pipe 40. However, such cutting waste may be trapped between the seal member 20 and the filter member 50 interposed between the inner peripheral surface of the joint body 10 and the outer peripheral surface of the connecting pipe 40, and may flow out from the gap. Absent. Therefore, even if cutting debris is generated when the locking portion 31 of the retaining ring 31 is locked to the outer peripheral surface of the connection pipe 40, the cutting debris is mixed with the clean water flowing in the connection pipe 40. There is no fear.

第３図は本発明の管継手の他の実施例を示す一部破断
断面図である。本実施例では，継手本体10内周面におけ
る抜け止めリング用凹溝13の継手本体10内奥側部分に，
継手本体内周面より突出する突条13dが設けられてお
り，該突条13dに，透水性かつ弾性を有する感情のフィ
ルター部材50が係止されている。そして、該フィルター
部材50における抜け止めリング用凹溝13側側面には，抜
け止めリング31が継手本体10に対して同心状に係止され
ている。FIG. 3 is a partially cutaway sectional view showing another embodiment of the pipe joint of the present invention. In the present embodiment, the inner peripheral surface of the joint body 10 has a recess 13 for the retaining ring on the inner side of the joint body 10.
A protrusion 13d protruding from the inner peripheral surface of the joint body is provided, and the emotional filter member 50 having water permeability and elasticity is locked to the protrusion 13d. A retaining ring 31 is concentrically locked to the joint body 10 on the side surface of the filter member 50 on the retaining ring concave groove 13 side.

本実施例では，抜け止めリング31が継手本体10に対し
て同心状に固定されているため，該継手本体10内に挿入
される接続管40が，容易に抜け止めリング31内に挿入さ
れる。In this embodiment, since the retaining ring 31 is concentrically fixed to the joint body 10, the connecting pipe 40 inserted into the joint body 10 can be easily inserted into the retaining ring 31. .

第４図に本発明のさらに他の実施例を示す。本実施例
で，第３図に示す実施例と同様に，抜け止めリング用凹
溝13の内奥側部分に突状13dが設けられており，該突条1
3dと，継手本体10のさらに内奥側の内周面との間に，透
水性および弾性を有する環状のフィルター部材50が配設
されている。そして，該フィルター部材50の抜け止めリ
ング用凹溝13側側面に抜け止めリング31が継手本体10と
同心状に係止されている。FIG. 4 shows still another embodiment of the present invention. In this embodiment, similarly to the embodiment shown in FIG. 3, a protrusion 13d is provided on the inner rear side of the groove 13 for the retaining ring.
An annular filter member 50 having water permeability and elasticity is disposed between 3d and the inner peripheral surface of the joint body 10 on the further inner side. A retaining ring 31 is concentrically engaged with the joint body 10 on the side surface of the filter member 50 on the retaining ring concave groove 13 side.

本実施例では，継手本体10内に挿入された接続管40
が，抜け止めリング31内に挿入されると，該抜け止めリ
ング31がフィルター部材50に押付けられ，該抜け止めリ
ング31の移動が停止される。In the present embodiment, the connection pipe 40 inserted in the joint body 10
However, when the retaining ring 31 is inserted into the retaining ring 31, the retaining ring 31 is pressed against the filter member 50 and the movement of the retaining ring 31 is stopped.

なお，上記実施例では，断面略円形状の抜け止めリン
グ31を用いる構成としたが，円筒状で，内周面に係止部
を有し，外周面に継手本体10の開口部11側になるに連れ
て徐々に縮径したテーパ面を有する抜け止め部材を用い
る構成としてもよい。Although the retaining ring 31 having a substantially circular cross section is used in the above embodiment, the retaining ring 31 has a cylindrical shape and has an engaging portion on the inner peripheral surface and an opening 11 side of the joint body 10 on the outer peripheral surface. A retaining member having a tapered surface whose diameter is gradually reduced may be used.

（発明の効果） 本発明は管継手は，このように，抜け止め部材が該接
続管外周面に係止する際に該接続管外周面を切削して切
削屑が発生しても，該切削屑はフィルター部材により接
続管内に流入しないようにされているため，該接続管内
に上水を通流させる場合も，上水に切削屑が混入しな
い。フィルター部材は透水性であるため，接続管内を通
流する水が，接続管の外側にまで流入する。従って，接
続管内が通流水により高圧になった場合にも，接続管の
外周面にはその高圧に等しい圧力が加わるため，接続管
は破損するおそれがない。(Effects of the Invention) As described above, the pipe joint according to the present invention can cut the outer peripheral surface of the connecting pipe when the retaining member is engaged with the outer peripheral surface of the connecting pipe and generate cutting waste even if cutting waste is generated. Since the dust is prevented from flowing into the connecting pipe by the filter member, the cutting dust is not mixed in the clean water when the clean water is allowed to flow through the connecting pipe. Since the filter member is water permeable, the water flowing in the connecting pipe flows to the outside of the connecting pipe. Therefore, even when the inside of the connecting pipe has a high pressure due to the flowing water, a pressure equal to the high pressure is applied to the outer peripheral surface of the connecting pipe, so that the connecting pipe is not damaged.

【図面の簡単な説明】[Brief description of drawings]

第１図は本発明の管継手の一例を示す一部破断断面図，
第２図はその動作説明のための要部拡大図，第３図およ
び第４図はそれぞれ本発明の管継手の他の実施例の一部
破断断面図である。 １……管継手,10……継手本体,11……開口部,12……シ
ール材用凹溝、13……抜け止めリング用凹溝,14……フ
ィルター部材用凹溝,20……シール材,31……抜け止めリ
ング,31a……係止部,40……接続管,50……フィルター部
材。FIG. 1 is a partially cutaway sectional view showing an example of a pipe joint of the present invention,
FIG. 2 is an enlarged view of an essential part for explaining the operation, and FIGS. 3 and 4 are partially cutaway sectional views of other embodiments of the pipe joint of the present invention. 1 …… Pipe joint, 10 …… Coupling body, 11 …… Opening, 12 …… Seal groove, 13 …… Retaining ring groove, 14 …… Filter member groove, 20 …… Seal Material, 31 …… retaining ring, 31a …… locking part, 40 …… connecting pipe, 50 …… filter member.

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】一端の開口部から接続管の端部が挿入され
る筒状であって，その内周側部分には，該開口部側にな
るに連れて徐々に小径となるように縮径したテーパ部を
有する凹溝が設けられた継手本体と， 該継手本体の凹溝内に配設されており，該継手本体内に
挿入される接続管に外嵌し得る円環状または円筒状で，
かつ，該凹溝のテーパ部に当接することにより接続管外
周面に係止する係止部を有する抜け止め部材と， 該抜け止めリングよりも前記継手本体の内奥側に配設さ
れ，該継手本体と該継手本体内に挿入された接続管との
間に介装される透水性のフィルター部材と， を具備する管継手。1. A cylindrical shape into which an end portion of a connecting pipe is inserted from an opening portion at one end, and an inner peripheral portion of the connecting pipe portion is contracted so that the diameter gradually becomes smaller toward the opening portion side. A joint main body provided with a concave groove having a tapered portion, and an annular shape or a cylindrical shape which is arranged in the concave groove of the joint main body and can be externally fitted to a connecting pipe inserted into the joint main body. so,
And a retaining member having a retaining portion that engages with the outer peripheral surface of the connecting pipe by coming into contact with the tapered portion of the recessed groove, and the retaining member is disposed on the inner rear side of the joint body with respect to the retaining ring. A pipe joint comprising: a joint body; and a water-permeable filter member interposed between the joint body and a connecting pipe inserted into the joint body.