JP3600764B2

JP3600764B2 - Pipe fittings

Info

Publication number: JP3600764B2
Application number: JP30629299A
Authority: JP
Inventors: 浩二池田; 孝彦進藤; 山田　　晃; 尚樹石田
Original assignee: 株式会社喜多村合金製作所
Priority date: 1999-10-28
Filing date: 1999-10-28
Publication date: 2004-12-15
Anticipated expiration: 2019-10-28
Also published as: CN1143070C; CN1295210A; JP2001124258A; KR20010039552A; KR100366129B1

Description

【０００１】
【発明の属する技術分野】
本発明は、給水用，給湯用等の接続管を挿入するだけで接続することのできる管継手に関するものである。
【０００２】
【従来の技術】
従来、給水用，給湯用等の接続管を挿入するだけで接続することができ、しかも容易に抜けないようにした差し込み式の管継手として公知のものに図５及び図６のものがある。この図５及び図６について簡単に説明すると、管継手３０は接続管３８の挿入を許容するスリーブ３２を備えたソケット３１と、スリーブ３２の外周に形成した溝孔３３に装着されるシール部材３４と、前記ソケット３１の内側でスリーブ３２と向かい合う食い込み溝３６を形成したリング３５と、該リング３５を締め付けるキャップ３７とからなり、キャップ３７をソケット３１に螺合した後に接続管３８をスリーブ３２とキャップ３７の間に挿入すると、接続管３８の外周面にはリング３５の食い込み溝３６が食い込み固定されるものである。
【０００３】
上記のものにあっては、接続管をスリーブとキャップの間に挿入する際に、図７に示すようにスリーブの軸方向に対し接続管を傾いた状態で差し込んだり、図８に示すように先端面が垂直に切断されていない接続管を差し込むと、接続管の先端がシール部材の外周面をめくり上げてしまったり、シール部材に傷を付けたり切断したりして、シール不良を引き起こし漏水が発生するという問題があり、作業性及び信頼性に欠けるものであった。
【０００４】
【発明が解決しようとする課題】
本発明が解決しようとする課題は、給水用，給湯用等の接続管を挿入するだけで接続できる管継手において、接続管の挿入を円滑に行えるようにし、作業性及び止水性能を向上させることである。
【０００５】
【課題を解決するための手段】
本発明は請求項１では、継手本体は外周に形成した雄ねじ部の内側に接続管を外嵌する円筒状の案内部を設け、該案内部は外周面に溝孔を形成し、該溝孔に接続管の内周面に密着するシール部材を装着し、前記雄ねじ部に螺着する袋ナットと案内部の間にリングを介在させ、樹脂製の接続管を袋ナットの開口部から挿入し、リングが接続管の外周面を押圧することで継手本体に接続可能とした管継手において、前記案内部の外周にシール部材を覆うことのできるガイド環を外嵌し、該ガイド環は接続管を袋ナットの開口部から挿入すると、接続管の内周面と案内部の外周面に挟圧された状態で、シール部材の外周面を均一に押圧しながら案内部をスライドするものである。
【０００６】
請求項２では、前記ガイド環は、案内部の外周面に外嵌する円筒部と、接続管の先端と当接する鍔部からなるものである。
【０００７】
【発明の実施の形態】
以下、本発明の実施の形態を図に基づいて詳細に説明する。
本発明の管継手Ａは図１乃至図４に示すように、接続管２２が外嵌される略円筒状の案内部８を設けた継手本体１と、該継手本体１に螺着する袋ナット１４と、該袋ナット１４と継手本体１の間に配設されたリング１８及び前記案内部８に外嵌するガイド環１１とを備えている。
【０００８】
前記継手本体１は図１及び図２に示すように略円筒状で、内部軸方向に湯水が通過する通路２が貫通して形成されており、スパナ等の締付け工具が係止されるように、外周面を例えば六角形状にした工具係止部３の一端側外周に、他の継手に接続される連結部６が形成され、他端側外周に該連結部６よりやや大径の雄ねじ部７が形成されている。
【０００９】
前記雄ねじ部７の内周には、所定の間隔をおいて前記接続管２２より小径に形成した円筒状の案内部８が設けられている。該案内部８の先端は雄ねじ部７より前方に露出し、外周面の先端側には溝孔９，９が軸方向に併設して環状に形成され、該溝孔９，９には同一形状のシール部材１０，１０がそれぞれ装着されている。なお、溝孔及びシール部材は１つだけにしてもよいが、複数個の方が止水性能は向上する。
【００１０】
前記シール部材１０は接続管２２の内周面に付着した異物の捕捉と水漏れを防止するためのもので、ゴム等の弾性材からなり、ガイド環１１及び接続管２２が案内部８に外嵌されるとシール部材１０，１０は変形し、接続管２２の内周面に水密的に密着してシールが確実となるようにしている。
【００１１】
前記ガイド環１１は図４に示すように、前記案内部８の外周面に装着した一方のシール部材１０を覆うことのできる長さの円筒部１２と、案内部８の先端と向かい合う端縁に円筒部よりやや大径に形成した鍔部１３からなり、案内部８の外周にスライド自在に外嵌されるものである。そして図２に示すように、鍔部１３が接続管２２の端面に当接すると、円筒部１２の内周面はシール部材１０の外周面に密接し、さらに接続管２２を挿入すると図３に示すように鍔部１３は継手本体１のストッパー４に当接して停止するものである。
【００１２】
袋ナット１４は内周面入口に前記継手本体１の雄ねじ部７に螺着する雌ねじ部１５が形成され、該雌ねじ部１５の奥には接続管２２が挿入される開口部１７に向かうにつれて徐々に小径にしたテーパー面１６が形成されている。
【００１３】
リング１８は袋ナット１４のテーパー面１６の内側に挿入されるものであり、図４に示すように軸方向の一部にスリット１９を形成することで、縮径及び拡径が可能で、内周面には接続管２２を容易に挿入するためのテーパー面２０、及び接続管２２の外周面を押圧し食い込む凹凸状の食い込み溝２１を形成している。従ってリング１８は接続管２２の挿入時に拡径するので管継手Ａに容易に挿入させることができるが、接続管２２を管継手Ａから引き出そうとする力が加わるとリング１８は縮径し、食い込み溝２１が接続管２２の外周面に深く食い込み、引き出せないようにしている。
【００１４】
接続管２２はポリエチレン，ポリプロピレン等の樹脂製で、継手本体１の案内部８と袋ナット１４の間に形成される空間に挿入され案内部８に水密的に外嵌するものであり、継手本体１の工具係止部３には、接続管２２の先端が工具係止部３内周に設けたストッパー４に当たるまで挿入されているのかを、外部のどの方向からでも目視できるように、確認孔５を周面に同一間隔で複数個（本実施例では３個）穿設している。
【００１５】
本発明において接続管２２を管継手Ａに接続するには、まず袋ナット１４を内部にガイド環１１とリング１８を挿入した状態で、図１に示すように継手本体１の雄ねじ部７に螺着する。この時ガイド環１１は案内部８の先端に外嵌される。
【００１６】
次に図１の状態から接続管２２の先端を袋ナット１４の開口部１７から挿入し、継手本体１の案内部８に外嵌すると、図２に示すように接続管２２の内周面はガイド環１１の円筒部１２外周面に外嵌し、円筒部１２は接続管２２の内周面と案内部８の外周面に挟圧された状態となり、円筒部１２の内周面がシール部材１０の外周面全体を均一に押圧しつつシール部材１０を覆ってスライドする。なおこの時、接続管２２の先端面が垂直でなく傾斜状に切断されていたり、接続管２２を袋ナット１４の開口部１７に傾いた状態で挿入することがあっても、接続管２２はシール部材１０に当接しないでガイド環１１に外嵌し、ガイド環１１の円筒部１２内周面がシール部材１０の外周面全体を均一に押圧するので、接続管２２の先端でシール部材１０がめくり上がったり、傷が付くということはない。
【００１７】
さらに接続管２２を奥に挿入すると、ガイド環１１は鍔部１３が接続管２２の端面で押圧されて接続管２２と共に移動し、図３に示すようにガイド環１１の鍔部１３が継手本体１のストッパー４に当接したところで停止する。この時、接続管２２は継手本体１の案内部８とリング１８の間で挟着され、しかもリング１８のテーパー面２０が接続管２２の外周面を押圧し、食い込み溝２１が外周面に食い込み、接続管２２を案内部８の外周面に押圧しているのでシール部材１０のシールが確実で、袋ナット１４を緩めないと引き抜くことはできない。
【００１８】
また、万一接続管２２の内周面に異物が付着していても、継手本体１の案内部８に装着されている先端側のシール部材１０で異物を捕捉し、内側のシール部材１０で接続管２２とのシールを確実に行うことができる。
【００１９】
さらに工具係止部３の周面に穿設した確認孔５からは、接続管２２の先端が継手本体１のストッパー４に当接しているかを目視することができ、ストッパー４に当接していない場合は、確認孔５を目視しながら接続管２２をもう一度奥まで挿入すればよい。
【００２０】
このような管継手Ａにおいて、接続管２２を継手本体１から引き抜こうとしても、リング１８が袋ナット１４のテーパー面１６に沿って開口部１７に向けて移動すれば食い込み溝２１がさらに深く接続管２２の外周面に食い込み、しかもシール部材１０が接続管２２の内周面を押圧しているので、漏水したり引き抜くことはできない。
【００２１】
また、接続管２２を通過する水に異常に高い水圧が加わると接続管２２は膨張するが、シール部材１０が変形して接続管２２の内周面に確実に密着し、漏水することはない。
【００２２】
【発明の効果】
本発明では、継手本体は外周に形成した雄ねじ部の内側に接続管を外嵌する円筒状の案内部を設け、該案内部は外周面に溝孔を形成し、該溝孔に接続管の内周面に密着するシール部材を装着し、前記雄ねじ部に螺着する袋ナットと案内部の間にリングを介在させ、樹脂製の接続管を袋ナットの開口部から挿入し、リングが接続管の外周面を押圧することで継手本体に接続可能とした管継手において、前記案内部の外周にシール部材を覆うことのできるガイド環を外嵌し、該ガイド環は接続管を袋ナットの開口部から挿入すると、接続管の内周面と案内部の外周面に挟圧された状態で、シール部材の外周面を均一に押圧しながら案内部をスライドするので、接続管を袋ナットから継手本体に挿入する際に接続管の先端面が傾斜状に切断されていたり、接続管が傾いていても、ガイド環がシール部材の外周面を均一に押圧し、シール部材がめくれたりよじれることがなく、スムーズに挿入することができ、接続作業を迅速に行えるうえ、無理な接続に起因する漏水等の恐れを取り除くことができる。
【００２３】
従来の管継手の案内部にガイド環を外嵌するだけで、作業性及び信頼性を著しく向上させることができる。
【図面の簡単な説明】
【図１】管継手に接続管を接続する前の状態の縦断面図である。
【図２】管継手に接続管を接続する途中の状態の縦断面図である。
【図３】管継手に接続管を接続した状態の縦断面図である。
【図４】管継手の分解斜視図である。
【図５】従来の管継手に接続管を接続する途中の状態の縦断面図である。
【図６】従来の管継手に接続管を接続した状態の縦断面図である。
【図７】図５の接続管を傾いた状態で管継手に差し込んだ場合の説明図である。
【図８】図５の先端面が傾斜状に切断された接続管を管接手に差し込んだ場合の説明図である。
【符号の説明】
１継手本体
７雄ねじ部
８案内部
９溝孔
１０シール部材
１１ガイド環
１２円筒部
１３鍔部
１４袋ナット
１７開口部
１８リング
２２接続管
Ａ管継手[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a pipe joint that can be connected simply by inserting a connection pipe for water supply, hot water supply, or the like.
[0002]
[Prior art]
Conventionally known plug-in type pipe joints that can be connected simply by inserting a connection pipe for water supply, hot water supply, or the like and that are not easily removed include those shown in FIGS. 5 and 6, the pipe joint 30 includes a socket 31 having a sleeve 32 that allows the connection pipe 38 to be inserted, and a seal member 34 mounted in a slot 33 formed on the outer periphery of the sleeve 32. And a ring 35 formed with a biting groove 36 facing the sleeve 32 inside the socket 31, and a cap 37 for tightening the ring 35. After the cap 37 is screwed into the socket 31, the connection pipe 38 is connected to the sleeve 32. When inserted between the caps 37, the biting grooves 36 of the ring 35 bite into the outer peripheral surface of the connection pipe 38 and are fixed.
[0003]
In the above, when the connecting pipe is inserted between the sleeve and the cap, as shown in FIG. 7, the connecting pipe is inserted in a state of being inclined with respect to the axial direction of the sleeve, or as shown in FIG. If you insert a connecting pipe whose end face is not cut vertically, the tip of the connecting pipe will flip up the outer peripheral surface of the sealing member, scratch or cut the sealing member, causing poor sealing and water leakage However, there has been a problem in that workability and reliability have been lacking.
[0004]
[Problems to be solved by the invention]
The problem to be solved by the present invention is to improve the workability and water stopping performance by smoothly inserting a connection pipe in a pipe joint that can be connected simply by inserting a connection pipe for water supply or hot water supply. That is.
[0005]
[Means for Solving the Problems]
According to the present invention, in the first aspect, the joint main body is provided with a cylindrical guide portion for externally fitting the connection pipe inside a male screw portion formed on the outer periphery, and the guide portion has a groove formed on the outer peripheral surface. Attach a seal member that is in close contact with the inner peripheral surface of the connection pipe, insert a ring between the cap nut screwed to the male thread and the guide section, and insert a resin connection pipe from the opening of the cap nut. In a pipe joint which can be connected to the joint body by the ring pressing the outer peripheral surface of the connecting pipe, a guide ring capable of covering a seal member is fitted around the outer periphery of the guide portion, and the guide ring is connected to the connecting pipe. Is inserted through the opening of the cap nut, the guide portion slides while uniformly pressing the outer peripheral surface of the seal member while being pressed between the inner peripheral surface of the connection pipe and the outer peripheral surface of the guide portion.
[0006]
In the second aspect, the guide ring includes a cylindrical portion externally fitted to the outer peripheral surface of the guide portion, and a flange portion abutting on the distal end of the connection pipe.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
As shown in FIGS. 1 to 4, a pipe joint A of the present invention includes a joint body 1 provided with a substantially cylindrical guide portion 8 to which a connection pipe 22 is fitted, and a cap nut screwed to the joint body 1. 14, a ring 18 disposed between the cap nut 14 and the joint body 1, and a guide ring 11 fitted to the guide portion 8.
[0008]
As shown in FIGS. 1 and 2, the joint body 1 has a substantially cylindrical shape, and has a passage 2 through which hot and cold water passes in an inner axial direction. The passage 2 is formed so that a tightening tool such as a spanner is locked. A connecting portion 6 to be connected to another joint is formed on the outer periphery of one end of the tool engaging portion 3 having a hexagonal outer peripheral surface, for example. 7 are formed.
[0009]
On the inner periphery of the external thread portion 7, a cylindrical guide portion 8 formed at a predetermined interval and having a smaller diameter than the connection pipe 22 is provided. The distal end of the guide portion 8 is exposed forward of the male screw portion 7, and grooves 9, 9 are formed in an annular shape on the distal end side of the outer peripheral surface along the axial direction, and have the same shape. Are mounted respectively. In addition, although only one slot and one seal member may be used, a plurality of members improve water stopping performance.
[0010]
The seal member 10 is for catching foreign matter adhered to the inner peripheral surface of the connection pipe 22 and preventing water leakage, and is made of an elastic material such as rubber, and the guide ring 11 and the connection pipe 22 When fitted, the seal members 10, 10 are deformed and tightly adhere to the inner peripheral surface of the connection pipe 22 in a watertight manner to ensure the seal.
[0011]
As shown in FIG. 4, the guide ring 11 has a cylindrical portion 12 having a length capable of covering one seal member 10 attached to the outer peripheral surface of the guide portion 8 and an edge facing the tip of the guide portion 8. It is composed of a flange portion 13 having a slightly larger diameter than the cylindrical portion, and is slidably fitted to the outer periphery of the guide portion 8. Then, as shown in FIG. 2, when the flange portion 13 comes into contact with the end surface of the connection pipe 22, the inner peripheral surface of the cylindrical portion 12 comes into close contact with the outer peripheral surface of the seal member 10. As shown, the flange 13 comes into contact with the stopper 4 of the joint body 1 and stops.
[0012]
The cap nut 14 has an internal thread 15 formed at the entrance of the inner peripheral surface thereof to be screwed to the external thread 7 of the joint main body 1. Is formed with a tapered surface 16 having a small diameter.
[0013]
The ring 18 is inserted inside the tapered surface 16 of the cap nut 14, and by forming a slit 19 in a part of the axial direction as shown in FIG. On the peripheral surface, a tapered surface 20 for easily inserting the connection pipe 22 and a concave and convex cutting groove 21 for pressing and biting the outer peripheral surface of the connection pipe 22 are formed. Accordingly, the ring 18 expands in diameter when the connecting pipe 22 is inserted, so that the ring 18 can be easily inserted into the pipe joint A. However, when a force is applied to pull out the connecting pipe 22 from the pipe joint A, the ring 18 is reduced in diameter and bites. The groove 21 penetrates deeply into the outer peripheral surface of the connection pipe 22 so that it cannot be pulled out.
[0014]
The connection pipe 22 is made of a resin such as polyethylene or polypropylene, and is inserted into a space formed between the guide portion 8 and the cap nut 14 of the joint main body 1 and is fitted to the guide portion 8 in a watertight manner. A confirmation hole is provided in the first tool engagement portion 3 so that it can be visually confirmed from any external direction whether or not the tip of the connection pipe 22 is inserted until it hits the stopper 4 provided on the inner periphery of the tool engagement portion 3. 5 (three in this embodiment) are formed at equal intervals on the peripheral surface.
[0015]
To connect the connection pipe 22 to the pipe joint A in the present invention, first, with the cap nut 14 inserted therein and the guide ring 11 and the ring 18 inserted therein, as shown in FIG. To wear. At this time, the guide ring 11 is fitted around the tip of the guide portion 8.
[0016]
Next, when the distal end of the connection pipe 22 is inserted from the opening 17 of the cap nut 14 into the guide section 8 of the joint main body 1 from the state of FIG. 1, the inner peripheral surface of the connection pipe 22 becomes as shown in FIG. The outer peripheral surface of the cylindrical portion 12 of the guide ring 11 is fitted to the outer peripheral surface of the connecting tube 22 and the outer peripheral surface of the guide portion 8, and the inner peripheral surface of the cylindrical portion 12 is sealed with a sealing member. The cover 10 slides over the seal member 10 while uniformly pressing the entire outer peripheral surface of the seal member 10. At this time, even if the distal end surface of the connection pipe 22 is cut not vertically but inclining, or the connection pipe 22 may be inserted into the opening 17 of the cap nut 14 in an inclined state, The outer peripheral surface of the cylindrical portion 12 of the guide ring 11 uniformly presses the entire outer peripheral surface of the seal member 10 without being in contact with the seal member 10. There is no flipping or scratching.
[0017]
When the connecting pipe 22 is further inserted into the back, the flange 13 of the guide ring 11 is pressed by the end face of the connecting pipe 22 and moves together with the connecting pipe 22, and as shown in FIG. It stops when it comes into contact with the first stopper 4. At this time, the connecting pipe 22 is sandwiched between the guide portion 8 of the joint body 1 and the ring 18, and the tapered surface 20 of the ring 18 presses the outer peripheral surface of the connecting pipe 22, and the biting groove 21 bites into the outer peripheral surface. Since the connecting pipe 22 is pressed against the outer peripheral surface of the guide portion 8, the sealing of the seal member 10 is reliable, and the sealing member 10 cannot be pulled out unless the cap nut 14 is loosened.
[0018]
Also, even if foreign matter adheres to the inner peripheral surface of the connection pipe 22, the foreign matter is captured by the distal-side seal member 10 attached to the guide portion 8 of the joint main body 1, and the foreign matter is captured by the inner seal member 10. Sealing with the connection pipe 22 can be reliably performed.
[0019]
Further, from the confirmation hole 5 formed in the peripheral surface of the tool engaging portion 3, it can be visually checked whether the tip of the connection pipe 22 is in contact with the stopper 4 of the joint body 1 and not in contact with the stopper 4. In this case, the connection pipe 22 may be inserted all the way again while visually checking the confirmation hole 5.
[0020]
In such a pipe joint A, when the ring 18 moves toward the opening 17 along the tapered surface 16 of the cap nut 14, even if an attempt is made to pull out the connection pipe 22 from the joint main body 1, the biting groove 21 is further connected. Since it penetrates the outer peripheral surface of the pipe 22 and the seal member 10 presses the inner peripheral surface of the connection pipe 22, water cannot be leaked or pulled out.
[0021]
Further, when an abnormally high water pressure is applied to the water passing through the connection pipe 22, the connection pipe 22 expands, but the seal member 10 is deformed and firmly adheres to the inner peripheral surface of the connection pipe 22, and does not leak. .
[0022]
【The invention's effect】
In the present invention, the joint main body is provided with a cylindrical guide portion for externally fitting the connection pipe inside the externally threaded portion formed on the outer periphery, the guide portion has a groove formed on the outer peripheral surface, and the connection hole of the connection pipe is formed in the groove hole. A seal member is attached to the inner peripheral surface, a ring is interposed between the cap nut screwed into the male thread and the guide, and a resin connection pipe is inserted through the cap nut opening to connect the ring. In a pipe joint that can be connected to the joint body by pressing the outer peripheral surface of the pipe, a guide ring that can cover a seal member is fitted around the outer circumference of the guide portion, and the guide ring connects the connecting pipe to the cap nut. When inserted from the opening, the guide is slid while uniformly pressing the outer peripheral surface of the sealing member while being pressed between the inner peripheral surface of the connecting pipe and the outer peripheral surface of the guide. When the connection pipe is inserted into the joint body, the tip Even if the connecting pipe is inclined, the guide ring uniformly presses the outer peripheral surface of the seal member, the seal member can be inserted smoothly without being turned up or twisted, and the connection work can be performed quickly. It is possible to eliminate the risk of water leakage or the like due to excessive connection.
[0023]
Workability and reliability can be remarkably improved only by fitting the guide ring to the guide portion of the conventional pipe joint.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a state before a connection pipe is connected to a pipe joint.
FIG. 2 is a longitudinal sectional view showing a state in which a connection pipe is being connected to a pipe joint.
FIG. 3 is a longitudinal sectional view showing a state where a connection pipe is connected to a pipe joint.
FIG. 4 is an exploded perspective view of a pipe joint.
FIG. 5 is a longitudinal sectional view showing a state in which a connecting pipe is being connected to a conventional pipe joint.
FIG. 6 is a longitudinal sectional view showing a state where a connection pipe is connected to a conventional pipe joint.
FIG. 7 is an explanatory view of a case where the connecting pipe of FIG. 5 is inserted into a pipe joint in an inclined state.
FIG. 8 is an explanatory diagram of a case where a connection pipe whose tip end surface is cut in an inclined shape in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Joint main body 7 Male screw part 8 Guide part 9 Slot 10 Seal member 11 Guide ring 12 Cylindrical part 13 Flange part 14 Cap nut 17 Opening part 18 Ring 22 Connection pipe A Pipe joint

Claims

The joint body is provided with a cylindrical guide portion for externally fitting the connection pipe inside the external thread portion formed on the outer periphery, the guide portion has a groove formed on the outer peripheral surface, and the inner peripheral surface of the connection pipe is formed in the groove hole. A sealing member is attached, and a ring is interposed between the cap nut and the guide, which are screwed to the male screw portion, and a resin connection pipe is inserted through the opening of the cap nut. In a pipe joint that can be connected to the joint body by pressing the guide ring, a guide ring that can cover the seal member is fitted around the outer periphery of the guide portion, and the guide ring inserts the connection pipe from the opening of the cap nut. Then, the pipe joint slides while uniformly pressing the outer peripheral surface of the seal member while being pressed between the inner peripheral surface of the connecting pipe and the outer peripheral surface of the guide portion.

The pipe joint according to claim 1, wherein the guide ring includes a cylindrical portion externally fitted to an outer peripheral surface of the guide portion, and a flange portion abutting on a distal end of the connection pipe.