JP2608489B2 - Joint for removing resin pipe - Google Patents
Joint for removing resin pipeInfo
- Publication number
- JP2608489B2 JP2608489B2 JP2270224A JP27022490A JP2608489B2 JP 2608489 B2 JP2608489 B2 JP 2608489B2 JP 2270224 A JP2270224 A JP 2270224A JP 27022490 A JP27022490 A JP 27022490A JP 2608489 B2 JP2608489 B2 JP 2608489B2
- Authority
- JP
- Japan
- Prior art keywords
- resin
- joint
- joint body
- end side
- stiffener
- 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
Landscapes
- Branch Pipes, Bends, And The Like (AREA)
Description
【発明の詳細な説明】 [産業上の利用分野] この発明は、金属製の管と樹脂製の管とを接続するた
めの樹脂管取出用継手に関する。Description: TECHNICAL FIELD The present invention relates to a joint for taking out a resin pipe for connecting a metal pipe and a resin pipe.
[従来の技術] 金属管と樹脂管とを接続するために、金属管と接続す
る部分は金属によって形成し、樹脂管と接続する部分は
樹脂によって形成した継手が提案されているが、そのよ
うな継手として従来のものは、専ら継手の金属部分を収
容した金型内に樹脂部分を射出成形することによって、
金属部分と樹脂部分とを一体に形成したものであった
(実公昭55−22312号、実公昭59−31987号、実公昭61−
18302号)。[Prior Art] In order to connect a metal tube and a resin tube, a joint has been proposed in which a portion connected to the metal tube is formed of metal and a portion connected to the resin tube is formed of resin. As a conventional joint, the resin part is exclusively injection-molded in a mold containing the metal part of the joint,
The metal part and the resin part were integrally formed (Japanese Utility Model Publication No. 55-22312, Japanese Utility Model Publication No. 59-31987, Japanese Utility Model Publication No. 61-1986).
18302).
[発明が解決しようとする課題] 上記従来の樹脂管取出用継手は、専ら継手の金属部分
を収容した金型内に樹脂部分を射出成形することによっ
て製造する他はないから、製造コストが高くなるという
問題点があった。また金属部分と樹脂部分との間が締付
け固定されていないために、温度変化に起因する金属部
分と樹脂部分との間の熱膨張の差異等によって金属部分
と樹脂部分とが剥離すると、直ちにシール性の破壊をも
たらすという問題点があった。[Problems to be Solved by the Invention] The above-mentioned conventional joint for removing a resin pipe has a high manufacturing cost because there is no other way but to manufacture the joint by exclusively injection-molding the resin part in a mold containing the metal part of the joint. There was a problem of becoming. Also, since the metal part and the resin part are not fastened and fixed, if the metal part and the resin part peel off due to the difference in thermal expansion between the metal part and the resin part due to temperature change, etc. There is a problem that it causes the destruction of sex.
したがって本発明は、製造容易でシール性の確実な樹
脂管取出用継手を提供することを目的とする。Therefore, an object of the present invention is to provide a joint for taking out a resin pipe which is easy to manufacture and has a reliable sealing property.
[課題を解決するための手段] 本発明は上記目的を達成するために成されたものであ
り、すなわち一端側にめねじを設け他端側の内周面に溝
を設けた継手本体と、該継手本体の外面を覆い継手本体
の前記他端側より突出した筒状部を有する樹脂被覆層
と、一端側を継手本体の前記他端側に嵌装し他端側は継
手本体の前記他端側より突出した樹脂製短管と、内面は
前記樹脂製短管に接し外面は継手本体の前記他端側端部
内面と前記樹脂被覆層の筒状部内面とに接するパッキン
と、樹脂製短管の前記一端側内面に嵌装したスティフナ
ーとからなり、該スティフナーを拡径して前記樹脂製短
管を前記継手本体に固定した樹脂管取出用継手である。Means for Solving the Problems The present invention has been made to achieve the above object, that is, a joint body having a female thread at one end and a groove at an inner peripheral surface at the other end, A resin coating layer having a tubular portion that covers the outer surface of the joint body and protrudes from the other end of the joint body; one end of the joint body is fitted to the other end of the joint body; A resin short tube protruding from an end side, a packing in which an inner surface is in contact with the resin short tube and an outer surface is in contact with the inner surface of the other end of the joint body and the inner surface of the cylindrical portion of the resin coating layer; A resin pipe take-out joint comprising a stiffener fitted on the inner surface of the one end side of the short pipe, and expanding the stiffener to fix the resin short pipe to the joint body.
[作用] 樹脂製短管の一端側内面に嵌装したスティフナーを拡
径すると、樹脂製短管の一端側も拡径されるから、該樹
脂製短管は継手本体の他端側内周面に形成した溝に喰い
込んで引抜き阻止力を発揮し、同時にパッキンは樹脂製
短管と継手本体の他端側端部内面及び樹脂被覆層の筒状
部内面との間で押圧されるから、内部流体の漏洩と外部
流体の進入とを防止する。[Operation] When the diameter of the stiffener fitted to the inner surface of one end of the resin short tube is increased, the diameter of one end of the resin short tube is also increased. Since the packing is pressed between the resin short tube and the inner surface of the other end of the joint body and the inner surface of the cylindrical portion of the resin coating layer, the packing is pressed at the same time to exert the pull-out inhibiting force by being engaged in the groove formed in the groove. Prevents leakage of internal fluid and entry of external fluid.
[実施例] 本発明を図面によって説明する。第1図は本発明によ
る樹脂管取出用継手の一実施例の上半断面下半正面図で
あり、継手本体1の左端側にはめねじ1aが刻設されてお
り、右端側の内面には周方向に複数の溝1bが形成されて
いる。継手本体1の外面は樹脂被覆層2によって覆われ
ており、該樹脂被覆層2は、継手本体のめねじ1aに接続
される金属管(図示せず)との間の接続部の外面防食を
果たすために、継手本体1の左端側より突出した突出部
2aを有し、また継手本体1の右端側より突出した筒状部
2bをも有する。[Example] The present invention will be described with reference to the drawings. FIG. 1 is an upper half cross-sectional lower half front view of an embodiment of a joint for taking out a resin pipe according to the present invention, in which a female screw 1a is engraved on a left end side of a joint main body 1, and an inner surface on a right end side is provided. A plurality of grooves 1b are formed in the circumferential direction. The outer surface of the joint main body 1 is covered with a resin coating layer 2, and the resin coating layer 2 protects the outer surface of a connection portion between the joint main body 1 and a metal pipe (not shown) connected to the female thread 1 a of the joint main body. To fulfill, a protrusion protruding from the left end side of the joint body 1
2a, and a cylindrical portion protruding from the right end side of the joint body 1
Also has 2b.
継手本体1の右端側内面に形成した溝1bの内面には、
ポリエチレン短管3の左端側が嵌装されており、該ポリ
エチレン短管3の右端側は継手本体1の右端側よりも突
出している。ポリエチレン短管3の右端には、適宜手段
によってポリエチレン管4が接続される。第1図では溶
着管5を介して、エレクトロフュージョンないしはヒー
トフュージョンによって、ポリエチレン短管3とポリエ
チレン管4とを接続する場合を仮想線によって示した。On the inner surface of the groove 1b formed on the inner surface on the right end side of the joint body 1,
The left end side of the polyethylene short tube 3 is fitted, and the right end side of the polyethylene short tube 3 protrudes from the right end side of the joint body 1. A polyethylene pipe 4 is connected to the right end of the polyethylene short pipe 3 by an appropriate means. In FIG. 1, the case where the polyethylene short tube 3 and the polyethylene tube 4 are connected by the electrofusion or the heat fusion via the welding tube 5 is shown by a virtual line.
ポリエチレン短管3の中間部外面にはパッキン6が嵌
装されており、したがってパッキン6の外面は継手本体
1の右端部内面と、樹脂被覆層2の筒状部2b内面とに接
している。A packing 6 is fitted on the outer surface of the intermediate portion of the polyethylene short tube 3. Therefore, the outer surface of the packing 6 is in contact with the inner surface of the right end portion of the joint body 1 and the inner surface of the cylindrical portion 2 b of the resin coating layer 2.
またポリエチレン短管3の左端側内面には、円筒形の
左端側に外方に突出した鍔を有するスティフナー7が嵌
装されており、この鍔はスティフナー7の位置決めを容
易にするために形成されているものである。スティフナ
ー7は当初の形状より拡径されており、且つ拡径した状
態でポリエチレン短管3を継手本体1に固定するもので
あり、したがって外力によって塑性変形して拡径できる
必要があり、本実施例ではスティフナー7は銅によって
形成している。A stiffener 7 having a flange protruding outward at the left end of the cylindrical shape is fitted on the inner surface on the left end side of the polyethylene short tube 3, and this flange is formed to facilitate positioning of the stiffener 7. Is what it is. The stiffener 7 is expanded from its original shape and fixes the polyethylene short pipe 3 to the joint body 1 in the expanded state. Therefore, it is necessary that the stiffener 7 can be plastically deformed by an external force to expand the diameter. In the example, the stiffener 7 is formed of copper.
第2図と第3図とは上記実施例の樹脂管取出用継手を
製造する一手段を示し、外面に樹脂被覆層2を固定した
継手本体1の内面に、外面にパッキン6を及び内面にス
ティフナー7を嵌装したポリエチレン短管3を嵌装し、
右端側又は左端側より治具を挿入する。図では右端側よ
り治具を挿入した場合を示した。本実施例ではこの治具
として、丸棒の左端に円盤を固定したT部材10と、該T
部材10の丸棒部に嵌装される円筒状のゴム11及び円筒部
材12とからなるゴムバルジを用いた。2 and 3 show one means of manufacturing the joint for removing a resin pipe of the above embodiment. The polyethylene short tube 3 fitted with the stiffener 7 is fitted,
Insert the jig from the right end or left end. The figure shows a case where the jig is inserted from the right end side. In this embodiment, as the jig, a T member 10 having a disk fixed to the left end of a round bar,
A rubber bulge composed of a cylindrical rubber 11 and a cylindrical member 12 fitted to the round bar portion of the member 10 was used.
このゴムバルジによるスティフナー7の拡径は、本実
施例では2回に分けて行っており、先ずゴム11が継手本
体の溝1b部分に至るように位置決めして(第2図)、ゴ
ム11が圧縮されるようにT部材10と円筒部材12とを押圧
すると、ゴム11は拡径するからスティフナー7も拡径
し、したがってポリエチレン短管3も拡径してその外面
は継手本体の溝1b内に喰い込む。しかるのちゴム11の圧
縮を解除するとゴム11は原形状に復するが、銅製のステ
ィフナー7は塑性変形して変形形状を維持する。In this embodiment, the diameter of the stiffener 7 is increased by the rubber bulge in two steps. First, the rubber 11 is positioned so as to reach the groove 1b of the joint body (FIG. 2), and the rubber 11 is compressed. When the T member 10 and the cylindrical member 12 are pressed so that the rubber 11 expands, the stiffener 7 also expands, so the polyethylene short tube 3 also expands, and its outer surface is placed in the groove 1b of the joint main body. Bite. Thereafter, when the compression of the rubber 11 is released, the rubber 11 returns to the original shape, but the copper stiffener 7 is plastically deformed and maintains the deformed shape.
次いでより小型のゴムバルジを用い、ゴム11がパッキ
ン6部分に至るように位置決めして(第3図)、ゴム11
を圧縮すると、ゴム11は拡径するからスティフナー7も
拡径してその形状を維持し、したがってポリエチレン短
管3も拡径して、パッキン6はポリエチレン短管3と継
手本体1の右端部内面及び樹脂被覆層2の筒状部1b内面
との間で押圧される。Then, using a smaller rubber bulge, the rubber 11 is positioned so as to reach the packing 6 (FIG. 3).
When compression is performed, the rubber 11 expands in diameter, so the stiffener 7 also expands and maintains its shape, so that the polyethylene short tube 3 also expands in diameter, and the packing 6 becomes in contact with the polyethylene short tube 3 and the right end inner surface of the joint body 1. And the inner surface of the cylindrical portion 1b of the resin coating layer 2 is pressed.
呼び径25Aのポリエチレン短管3を継手本体1に固定
した例では、1次拡径力として約2.000kg・f、2次拡
径力として約1,000kg・fで拡径すると、樹脂被覆管3
は過度に変形することなく継手本体1に固定され、また
パッキン6によるシール作用も最適であった。なお1次
拡径と2次拡径とを同一のゴムバルジによって行うこと
もできるし、より大型のゴムバルジによって1回の拡径
で済ませることもできる。またスティフナー7の拡径を
他の手段によって行ってもよく、すなわち本発明はステ
ィフナー7の拡径手段について問うものではない。In the example in which the polyethylene short pipe 3 having a nominal diameter of 25 A is fixed to the joint body 1, when the diameter is expanded at about 2.000 kg · f as the primary expanding force and at about 1,000 kg · f as the secondary expanding force, the resin cladding tube is formed. 3
Was fixed to the joint body 1 without excessive deformation, and the sealing action by the packing 6 was also optimal. The primary diameter expansion and the secondary diameter expansion can be performed by the same rubber bulge, or a single rubber bulge can be used for one diameter expansion. Further, the diameter of the stiffener 7 may be expanded by other means, that is, the present invention does not ask about the means of expanding the stiffener 7.
本実施例は以上のように構成されており、ポリエチレ
ン短管3は継手本体1の溝1bに喰い込んでいるから引抜
き阻止力を発揮し、またパッキン6はポリエチレン短管
3と継手本体1の右端部との間で押圧されて内部流体の
漏洩を防止し、更にポリエチレン短管3と樹脂被覆層2
の筒状部2bとの間で押圧されて外部流体の進入を防止し
て外面防食を果たしている。またポリエチレン短管3の
溝1bへの喰い込みとパッキン6の押圧とはスティフナー
7の塑性変形によって維持されているから、温度変化等
があっても本樹脂管取出用継手の機能を損なうことがな
いし、またポリエチレン短管3を継手本体1と一体成形
する必要はないから、本樹脂管取出用継手の製造は容易
である。The present embodiment is configured as described above, and the polyethylene short pipe 3 exerts a pull-out inhibiting force because it is bitten into the groove 1b of the joint main body 1, and the packing 6 is formed between the polyethylene short pipe 3 and the joint main body 1. It is pressed between the right end and prevents the leakage of the internal fluid, and furthermore, the polyethylene short pipe 3 and the resin coating layer 2
And presses against the cylindrical portion 2b to prevent entry of an external fluid, thereby achieving external corrosion protection. In addition, since the biting of the polyethylene short tube 3 into the groove 1b and the pressing of the packing 6 are maintained by the plastic deformation of the stiffener 7, even if there is a temperature change or the like, the function of the joint for removing the resin tube may be impaired. In addition, since it is not necessary to integrally form the polyethylene short pipe 3 with the joint body 1, it is easy to manufacture the present joint for removing a resin pipe.
[発明の効果] 本発明によって、製造容易で且つ継手の内外に対する
シール性の確実な樹脂管取出用継手が提供された。[Effects of the Invention] According to the present invention, there is provided a joint for taking out a resin pipe which is easy to manufacture and has a reliable sealing property between the inside and the outside of the joint.
【図面の簡単な説明】 第1図は本発明の一実施例の上半断面下半正面図、第2
図と第3図とは同実施例を製造するための一方法を示す
上半断面下半正面図である。 1……継手本体、1a……めねじ、1b……溝 2……樹脂被覆層、2a……突出部、2b……筒状部 3……ポリエチレン短管、4……ポリエチレン管 5……溶着管、6……パッキン、7……スティフナー 10……T部材、11……ゴム、12……円筒部材BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an upper half sectional lower half front view of one embodiment of the present invention, FIG.
FIG. 3 and FIG. 3 are upper half cross-sectional lower half front views showing one method for manufacturing the same embodiment. DESCRIPTION OF SYMBOLS 1 ... Joint body, 1a ... Female thread, 1b ... Groove 2 ... Resin coating layer, 2a ... Projection part, 2b ... Cylindrical part 3 ... Polyethylene short pipe, 4 ... Polyethylene pipe 5 ... Welding tube, 6 Packing, 7 Stiffener 10 T member, 11 Rubber, 12 Cylindrical member
Claims (1)
を設けた継手本体と、該継手本体の外面を覆い継手本体
の前記他端側より突出した筒状部を有する樹脂被覆層
と、一端側を継手本体の前記他端側に嵌装し他端側は継
手本体の前記他端側より突出した樹脂製短管と、内面は
前記樹脂製短管に接し外面は継手本体の前記他端側端部
内面と前記樹脂被覆層の筒状部内面とに接するパッキン
と、樹脂製短管の前記一端側内面に嵌装したスティフナ
ーとからなり、該スティフナーを拡径して前記樹脂製短
管を前記継手本体に固定した樹脂管取出用継手。1. A joint body having a female thread on one end side and a groove formed on an inner peripheral surface on the other end side, and a tubular portion covering the outer surface of the joint body and projecting from the other end side of the joint body. A resin coating layer, one end side of which is fitted to the other end side of the joint body, the other end side is a resin short tube projecting from the other end side of the joint body, and the inner surface is in contact with the resin short tube and the outer surface is A packing that comes into contact with the inner surface of the other end of the joint body and the inner surface of the cylindrical portion of the resin coating layer, and a stiffener fitted to the inner surface of the one end of the short resin tube, and the stiffener is expanded in diameter. A resin pipe take-out joint in which the resin short pipe is fixed to the joint body.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2270224A JP2608489B2 (en) | 1990-10-08 | 1990-10-08 | Joint for removing resin pipe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2270224A JP2608489B2 (en) | 1990-10-08 | 1990-10-08 | Joint for removing resin pipe |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04145293A JPH04145293A (en) | 1992-05-19 |
JP2608489B2 true JP2608489B2 (en) | 1997-05-07 |
Family
ID=17483276
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2270224A Expired - Lifetime JP2608489B2 (en) | 1990-10-08 | 1990-10-08 | Joint for removing resin pipe |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2608489B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2517890Y2 (en) * | 1990-10-16 | 1996-11-20 | 日本鋼管継手株式会社 | Conversion joint between resin pipe and metal pipe |
JP2009068715A (en) * | 2001-12-25 | 2009-04-02 | Mirai Ind Co Ltd | Connection device comprising water passing tube and connection body and connection structure comprising water passing tube and connection body |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61175392A (en) * | 1985-01-31 | 1986-08-07 | 東京瓦斯株式会社 | Method of connecting metallic pipe and plastic pipe |
JPH0211672U (en) * | 1988-06-30 | 1990-01-24 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0515674Y2 (en) * | 1988-05-30 | 1993-04-23 |
-
1990
- 1990-10-08 JP JP2270224A patent/JP2608489B2/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61175392A (en) * | 1985-01-31 | 1986-08-07 | 東京瓦斯株式会社 | Method of connecting metallic pipe and plastic pipe |
JPH0211672U (en) * | 1988-06-30 | 1990-01-24 |
Also Published As
Publication number | Publication date |
---|---|
JPH04145293A (en) | 1992-05-19 |
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