JPH09242970A - Electrically fused joint - Google Patents
Electrically fused jointInfo
- Publication number
- JPH09242970A JPH09242970A JP8051294A JP5129496A JPH09242970A JP H09242970 A JPH09242970 A JP H09242970A JP 8051294 A JP8051294 A JP 8051294A JP 5129496 A JP5129496 A JP 5129496A JP H09242970 A JPH09242970 A JP H09242970A
- Authority
- JP
- Japan
- Prior art keywords
- layer body
- heating wire
- groove
- inner layer
- terminal pin
- 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.)
- Granted
Links
Landscapes
- Branch Pipes, Bends, And The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電熱線を発熱させ
て合成樹脂管を融着接合できる電気融着継手に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric fusion joint capable of fusion-bonding synthetic resin pipes by heating an electric heating wire.
【０００２】[0002]
【従来の技術】従来からガス管や給水・給湯管等の合成
樹脂管の接続には、合成樹脂からなる継手本体の両端部
に受口を設け、それぞれの受口内周面に電熱線を埋設し
たソケット継手が使用されている。例えば、実公平５ー
２０９５７号には、継手本体を構成する内層体の外面に
係止溝を刻設して該溝に電熱線を埋設し、また内層体の
適所に端子ピンが立設し、該端子ピンの隣り合う２カ所
に設けたフランジ状の鍔によって形成された環状溝に前
記電熱線の端部を巻回すると共に、該内層体の外面に外
層体を一体的に融着接合した電気融着継手が提案されて
いる。2. Description of the Related Art Conventionally, for connecting synthetic resin pipes such as gas pipes and water / hot water supply pipes, sockets are provided at both ends of a joint body made of synthetic resin, and heating wires are embedded in inner surfaces of the sockets. Used socket fittings. For example, in Japanese Utility Model Publication No. 5-20957, a locking groove is engraved on the outer surface of the inner layer body that constitutes the joint body, the heating wire is embedded in the groove, and a terminal pin is erected at a proper position on the inner layer body. An end portion of the heating wire is wound around an annular groove formed by flange-shaped flanges provided at two adjacent positions of the terminal pin, and an outer layer body is integrally fusion-bonded to an outer surface of the inner layer body. An electric fusion-bonded joint has been proposed.
【０００３】[0003]
【発明が解決しようとする課題】ところが、この従来継
手は、フランジ状の鍔によって形成された一条の環状溝
に電熱線の端部が巻回されるだけであるため、電熱線の
端部がしっかりと固定されないことがあった。また、電
熱線の端部を端子ピンに巻き付ける回数が一定しないと
きには電熱線の抵抗値が変動し、電熱線に印加する電圧
との関係で融着不良の発生することがあった。However, in this conventional joint, since the end of the heating wire is only wound around the single annular groove formed by the flange-shaped collar, the end of the heating wire is Sometimes it wasn't fixed securely. Further, when the number of times the end portion of the heating wire is wound around the terminal pin is not constant, the resistance value of the heating wire fluctuates, and the fusion failure may occur in relation to the voltage applied to the heating wire.
【０００４】本発明はかかる課題を解決したものであっ
て、電熱線の端部を端子ピンに簡単かつ確実に固定でき
ると共に、合成樹脂管との融着接合が確実に行える電気
融着継手を提供するものである。The present invention has been made to solve the above problems, and provides an electric fusion joint capable of easily and surely fixing an end of a heating wire to a terminal pin and reliably performing fusion bonding with a synthetic resin pipe. It is provided.
【０００５】[0005]
【課題を解決するための手段】本発明は、熱可塑性樹脂
からなる内層体と外層体との境界面に電熱線を埋設した
電気融着継手であって、内層体の境界面に所定間隔をも
って係止溝を刻設すると共に、該係止溝に電熱線を埋設
する。また、内層体の適所には端子ピンを立設し、該端
子ピンの隣り合う３カ所に設けたフランジ状の鍔によっ
て区分された環状溝を形成すると共に、真中の鍔には双
方の環状溝に連通する切溝を設ける。そして、前記電熱
線の端部を切溝を介して一方の環状溝から他方の環状溝
に亘って巻回し、該内層体の境界面に外層体を一体的に
融着接合したことを特徴とする。DISCLOSURE OF THE INVENTION The present invention is an electric fusion joint in which a heating wire is embedded in a boundary surface between an inner layer body made of a thermoplastic resin and an outer layer body, wherein the boundary surface of the inner layer body has a predetermined interval. A locking groove is engraved and a heating wire is embedded in the locking groove. In addition, terminal pins are erected at appropriate places on the inner layer body, and annular grooves are formed which are divided by flange-shaped flanges provided at three adjacent positions of the terminal pins, and both annular grooves are formed in the middle flange. A kerf communicating with the. The end portion of the heating wire is wound from one annular groove to the other annular groove via a cut groove, and the outer layer body is integrally fusion-bonded to the boundary surface of the inner layer body. To do.
【０００６】[0006]
【発明の実施の形態】以下、本発明の実施例を図面にて
詳細に説明する。図１は本発明の一実施例を示す電気融
着継手の要部を示す断面図、図２は図１の要部拡大図で
あって、図中の符号１は継手本体、２は電熱線、３は端
子ピン、Ｐは合成樹脂管である。Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing a main part of an electric fusion joint showing an embodiment of the present invention, and FIG. 2 is an enlarged view of a main part of FIG. 1, wherein reference numeral 1 is a joint body, and 2 is a heating wire. 3 is a terminal pin, and P is a synthetic resin tube.
【０００７】継手本体１は、ポリエチレン等の熱可塑性
樹脂からなる内層体１Ａと外層体１Ｂとで構成されてい
る。内層体１Ａは筒状に成形されており、その外周面に
はスパイラル状に連続した係止溝１１が所定間隔に刻設
され、該係止溝１１に電熱線２が埋設されている。ま
た、内層体１Ａの両端外周には端子ピン３が突設されて
いる。The joint body 1 is composed of an inner layer body 1A and an outer layer body 1B made of a thermoplastic resin such as polyethylene. The inner layer body 1A is formed into a tubular shape, and spirally continuous locking grooves 11 are formed at predetermined intervals on the outer peripheral surface thereof, and the heating wire 2 is embedded in the locking grooves 11. In addition, terminal pins 3 are provided on the outer circumference of both ends of the inner layer body 1A.
【０００８】前記端子ピン３には隣り合う３カ所にフラ
ンジ状の鍔３１，３２，３３が設けられており、それぞ
れの鍔３１，３２，３３によって区分された環状溝３
４，３５が形成されている。また、真中の鍔３２には双
方の環状溝３４，３５に連通する切溝３２ａが設けられ
ており、前記電熱線２の端部が切溝３２ａを介して一方
の環状溝３４から他方の環状溝３５に亘って一体的に巻
回固定されている。尚、図１及び２には、環状溝３４，
３５の幅寸法を電熱線２の線径とほぼ同程度としたもの
を例示したが、継手の種類、サイズ等に応じて電熱線２
の線径の１〜５倍とすることができる。The terminal pin 3 is provided with flange-shaped flanges 31, 32, 33 at three adjacent positions, and the annular groove 3 is divided by the flanges 31, 32, 33.
4, 35 are formed. Further, the middle flange 32 is provided with a cut groove 32a communicating with both annular grooves 34, 35, and the end portion of the heating wire 2 is cut from the one annular groove 34 to the other annular groove via the cut groove 32a. It is wound and fixed integrally over the groove 35. 1 and 2, the annular groove 34,
Although the width dimension of the heating wire 35 is approximately the same as the wire diameter of the heating wire 2, the heating wire 2 is selected depending on the type and size of the joint.
The diameter can be 1 to 5 times.
【０００９】そして、電熱線２が埋設された内層体１Ａ
の境界面には筒状の外層体１Ｂが一体的に融着接合して
いる。この融着接合の一例として、内層体１Ａを金型内
にセットしてからキャビテイ内に溶融樹脂を射出し、内
層体１Ａの境界面に筒状の外層体１Ｂを一体的に成形す
るとよい。Then, the inner layer body 1A in which the heating wire 2 is embedded
The cylindrical outer layer body 1B is integrally fusion-bonded to the boundary surface of. As an example of this fusion bonding, it is advisable to set the inner layer body 1A in a mold and then inject the molten resin into the cavity to integrally form the cylindrical outer layer body 1B on the boundary surface of the inner layer body 1A.
【００１０】本発明の電気融着継手は前記の構成からな
るものであって、係止溝１１に埋設された電熱線２の端
部が鍔３２に設けた切溝３２ａを介して双方の環状溝３
４，３５に巻回されるため、強固に締付固定される。こ
のため、射出成型によって内層体１Ａの境界面に外層体
１Ｂを一体的に融着接合する間での間に電熱線２が緩ん
で係止溝１１から脱出することもない。The electric fusion joint of the present invention has the above-mentioned structure, and the end portion of the heating wire 2 buried in the locking groove 11 is provided with a groove 32a provided in the collar 32 so that both ends are annular. Groove 3
Since it is wound around 4, 35, it is firmly clamped and fixed. Therefore, the heating wire 2 does not loosen and escape from the locking groove 11 while the outer layer body 1B is integrally fusion-bonded to the boundary surface of the inner layer body 1A by injection molding.
【００１１】尚、前記実施例では、筒状に成形した内層
体を用いてソケットタイプの電気融着継手に適用した場
合について例示したが、本発明はこれに限定されない。
シート状に形成した内層体を用いて分岐サドルタイプの
電気融着継手に適用することもできる。この場合には、
シート状に形成した内層体の片面に刻設した渦巻状の係
止溝を電熱線を埋設してから、電熱線の端部を内層体に
立設した端子ピンに巻回固定し、射出成型によって内層
体の片面に外層体を一体的に融着接合することができ
る。In the above embodiment, the case where the inner layer body formed in a cylindrical shape is used and applied to the socket type electric fusion joint is illustrated, but the present invention is not limited to this.
It can also be applied to a branch saddle type electric fusion joint by using a sheet-shaped inner layer body. In this case,
After embedding the heating wire in the spiral locking groove engraved on one side of the sheet-shaped inner layer body, the end of the heating wire is wound around and fixed to the terminal pin erected on the inner layer body, and injection molded. Thus, the outer layer body can be integrally fused and bonded to one surface of the inner layer body.
【００１２】[0012]
【発明の効果】以上詳述した如く、本発明は端子ピンの
隣り合う３カ所に設けたフランジ状の鍔によって区分さ
れた環状溝を形成すると共に、真中の鍔には双方の環状
溝に連通する切溝を設け、電熱線の端部を切溝を介して
一方の環状溝から他方の環状溝に亘って巻回するので、
内層体の境界面に外層体を一体的に融着接合する間での
間に電熱線が緩んで係止溝から脱出することもない。As described above in detail, according to the present invention, the annular groove is formed by the flange-shaped flanges provided at three adjacent positions of the terminal pin, and the central flange is connected to both annular grooves. Since the cutting groove is provided and the end of the heating wire is wound from one annular groove to the other annular groove via the cutting groove,
The heating wire does not loosen and escape from the locking groove during the fusion bonding of the outer layer body to the boundary surface of the inner layer body.
【００１３】また、電熱線の端部が端子ピンに確実かつ
強固に固定されるため、端子ピンへの電熱線の巻回数が
一定となって電熱線の抵抗値が変動しないため、継手本
体に合成樹脂管を嵌挿してから電熱線に所定の電圧を所
定時間印加するだけで、強固な融着接合が得られる。Further, since the end portion of the heating wire is securely and firmly fixed to the terminal pin, the number of windings of the heating wire around the terminal pin is constant and the resistance value of the heating wire does not fluctuate. A strong fusion-bonding can be obtained only by inserting the synthetic resin tube and then applying a predetermined voltage to the heating wire for a predetermined time.
【図１】図１は本発明の一実施例を示す電気融着継手の
要部を示す断面図である。FIG. 1 is a sectional view showing an essential part of an electric fusion joint showing an embodiment of the present invention.
【図２】図２は図１の要部拡大図である。FIG. 2 is an enlarged view of a main part of FIG.
１ 継手本体 ２ 電熱線 ３ 端子ピン １１ 係止溝 ３１、３２，３３ 鍔 ３４，３５ 環状溝 ３２ａ 切溝 1 Joint body 2 Heating wire 3 Terminal pin 11 Locking groove 31, 32, 33 Tsuba 34, 35 Annular groove 32a Cutting groove
Claims (1)
外層体（１Ｂ）との境界面に電熱線（２）を埋設した電
気融着継手であって、内層体（１Ａ）の境界面に所定間
隔をもって係止溝（１１）を刻設すると共に、該係止溝
（１１）に電熱線（２）を埋設し、また内層体（１Ａ）
の適所には端子ピン（３）が立設し、該端子ピン（３）
の隣り合う３カ所に設けたフランジ状の鍔（３１，３
２，３３）によって区分された環状溝（３４，３５）を
形成すると共に、真中の鍔（３２）には双方の環状溝
（３４，３５）に連通する切溝（３２ａ）を設け、前記
電熱線（２）の端部を切溝（３２ａ）を介して一方の環
状溝（３４）から他方の環状溝（３５）に亘って巻回
し、該内層体（１Ａ）の境界面に外層体（１Ｂ）を一体
的に融着接合した構成からなることを特徴とする電気融
着継手。1. An electric fusion joint in which a heating wire (2) is embedded in a boundary surface between an inner layer body (1A) made of a thermoplastic resin and an outer layer body (1B), the boundary surface of the inner layer body (1A). The engaging groove (11) is engraved at a predetermined interval on the inner surface, and the heating wire (2) is embedded in the engaging groove (11).
The terminal pin (3) is erected in the proper place of the terminal pin (3)
Flange-like collars (31, 3
2 and 33) to form an annular groove (34, 35), and the central flange (32) is provided with a cutting groove (32a) communicating with both annular grooves (34, 35). The end portion of the heat wire (2) is wound from the one annular groove (34) to the other annular groove (35) via the cut groove (32a), and the outer layer body (1A) is wound around the boundary surface of the inner layer body (1A). 1B) is an integral fusion-bonding structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05129496A JP3571839B2 (en) | 1996-03-08 | 1996-03-08 | Electric fusion joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05129496A JP3571839B2 (en) | 1996-03-08 | 1996-03-08 | Electric fusion joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09242970A true JPH09242970A (en) | 1997-09-16 |
| JP3571839B2 JP3571839B2 (en) | 2004-09-29 |
Family
ID=12882911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05129496A Expired - Fee Related JP3571839B2 (en) | 1996-03-08 | 1996-03-08 | Electric fusion joint |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3571839B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106684587A (en) * | 2017-01-09 | 2017-05-17 | 宁波恒元精工管阀科技有限公司 | Conductive binding post of pipe and mounting method for conductive binding post |
| CN108591660A (en) * | 2018-05-16 | 2018-09-28 | 宁波恒元精工管阀科技有限公司 | Wiring terminal of electric melting pipe |
-
1996
- 1996-03-08 JP JP05129496A patent/JP3571839B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106684587A (en) * | 2017-01-09 | 2017-05-17 | 宁波恒元精工管阀科技有限公司 | Conductive binding post of pipe and mounting method for conductive binding post |
| CN108591660A (en) * | 2018-05-16 | 2018-09-28 | 宁波恒元精工管阀科技有限公司 | Wiring terminal of electric melting pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3571839B2 (en) | 2004-09-29 |
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