JP2516996Y2 - Electrofusion fittings - Google Patents
Electrofusion fittingsInfo
- Publication number
- JP2516996Y2 JP2516996Y2 JP1987160582U JP16058287U JP2516996Y2 JP 2516996 Y2 JP2516996 Y2 JP 2516996Y2 JP 1987160582 U JP1987160582 U JP 1987160582U JP 16058287 U JP16058287 U JP 16058287U JP 2516996 Y2 JP2516996 Y2 JP 2516996Y2
- Authority
- JP
- Japan
- Prior art keywords
- coil
- heat
- joint
- connecting member
- adhesive
- 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
【考案の詳細な説明】 産業上の利用分野 この考案はプラスチック管を連結するのに使用される
管継手に関し、ことに内側にコイル状の電熱線(以下コ
イルという)を埋設し、これに通電して管との接触面を
加熱溶融することにより融着するエレクトロフュージョ
ン継手に関する。TECHNICAL FIELD The present invention relates to a pipe joint used for connecting plastic pipes, and in particular, a coiled heating wire (hereinafter referred to as a coil) is embedded inside and a current is applied to this. The present invention relates to an electrofusion joint in which a contact surface with a tube is fused by heating and melting.
従来技術 上下水道管やガス管などに使用されるプラスチック管
の管継手として近年開発されたものにエレクトロフュー
ジョン継手がある。この継手は図示するように、内側に
コイルを埋設した成形品よりなっており、管との融着
は、継手の両側より管を嵌挿後通電して接触面を加熱溶
融することにより行うようになっている。2. Description of the Related Art Electrofusion joints have been recently developed as pipe joints for plastic pipes used for water and sewer pipes and gas pipes. As shown in the figure, this joint consists of a molded product with a coil embedded inside, and fusion with the pipe is performed by inserting the pipe from both sides of the joint and energizing it to heat and melt the contact surface. It has become.
考案が解決しようとする問題点 エレクトロフュージョン継手は、管の連結が継手の両
側より管を嵌挿後通電するだけで行うことができ従来の
ように管継手と管の互いの接触面を加熱溶融したのち管
に管継手を嵌挿して行うのと比べ、連結作業を容易かつ
迅速に行うことができて作業能率が向上し、しかも連結
を比較的確実に行うことができる利点があるが、なお解
決されるべき問題点を有している。その一つがコイルに
通電して発熱させ、周囲の熱可塑性樹脂を溶融させたと
きコイルが溶融樹脂の流れにより流されたり、またコイ
ル自体の捩れによりコイルが移動し、コイルのピッチが
均一でなくなることで(第8図)、ピッチが均一でなく
なると、発熱密度も不均一となり、第8図のニ、ヘで示
されるようにショートしたり、ピッチの小さい部分イで
は高温になり過ぎて樹脂の高温劣化を招き、またロ、
ハ、ホ、トで示されるように、ピッチの大きな部分では
温度上昇が少く溶融不足となり、いづれの場合も溶融不
良を起すようになる。Problems to be solved by the invention Electrofusion joints can be connected simply by inserting the pipes from both sides of the joint and energizing the pipes, and then heating and melting the contact surfaces of the pipe joint and the pipe as in the past. After that, compared to inserting the pipe joint into the pipe, there is an advantage that the connection work can be performed easily and quickly, the work efficiency is improved, and the connection can be performed relatively reliably. It has a problem to be solved. One of them energizes the coil to generate heat, and when the surrounding thermoplastic resin is melted, the coil is swept by the flow of the molten resin, or the coil moves due to the twisting of the coil itself, and the coil pitch becomes uneven. As a result (Fig. 8), if the pitch is not uniform, the heat generation density will also be non-uniform, resulting in short-circuiting as shown in Fig. 8 D and F, or the temperature will become too high in the small pitch area B Cause high temperature deterioration of
As indicated by C, E, and G, in a portion with a large pitch, the temperature rise is small and insufficient melting occurs, and in either case, defective melting occurs.
問題点の解決手段 本考案はコイルのピッチが変わらないようにして発熱
密度を均一に保ち、上述するようなショートや溶融不良
を生じないようにしたもので、コイルのピッチが変わら
ないようにするためにコイルを下記(1)〜(4)のい
づれか一つの連結手段によって連結し、固定状態とした
ものである。The present invention is to prevent the short circuit and the melting failure as described above by keeping the heat generation density uniform by keeping the pitch of the coil unchanged, so that the pitch of the coil does not change. For this purpose, the coils are connected by any one of the following connecting means (1) to (4) to be in a fixed state.
(1)第2図に示されるように、継手の軸方向に延びる
板状部材であって、非電導性で耐熱性を有し、その一方
側にコイル3と同一ピッチでコイル3の嵌まる溝1を形
成した連結部材2よりなり、該部材2の各溝にコイル3
を嵌合させることによってコイルを連結する手段。(1) As shown in FIG. 2, a plate-shaped member extending in the axial direction of the joint, having non-conductivity and heat resistance, and one side of which the coil 3 is fitted at the same pitch as the coil 3. A connecting member 2 having a groove 1 is formed, and a coil 3 is provided in each groove of the member 2.
Means for connecting the coils by fitting.
(2)第4図に示されるように、継手の軸方向に延びる
棒状部材であって、耐熱性を有する連結部材6と、非電
導性で耐熱性を有し、連結部材6にコイル7を連結する
接着剤8とよりなり、コイル7を連結部材6に接着剤8
を介して連結する手段、又は継手の軸方向に延びる棒状
部材であって、非電導性で耐熱性を有する連結部材6
と、耐熱性を有し、連結部材6にコイル7を連結する接
着剤8とよりなり、コイル7を連結部材6に接着剤8を
介して連結する手段。(2) As shown in FIG. 4, a rod-shaped member extending in the axial direction of the joint, having a heat-resistant connecting member 6, and a non-conductive and heat-resistant connecting member 6 provided with a coil 7. The adhesive 8 for connecting the coil 7 to the connecting member 6
Or a rod-shaped member extending in the axial direction of the joint, which is non-conductive and has heat resistance.
And an adhesive 8 having heat resistance and connecting the coil 7 to the connecting member 6, and connecting the coil 7 to the connecting member 6 via the adhesive 8.
(3)第6図に示されるように、熱溶融性プラスチック
製スリーブ13にコイル12を該スリーブ外面へ軸方向に連
なる非電導性で耐熱性を有する帯状接着剤を介して連結
する手段。連結するのに使用される接着剤としては、例
えばビスフェノール型エポキシ、エポキシフェノール、
ブタジエン−アクリロニトリル、シリコーン、変性シリ
コーン等がある。(3) As shown in FIG. 6, means for connecting the coil 12 to the heat-meltable plastic sleeve 13 to the outer surface of the sleeve via a non-conductive and heat-resistant band-shaped adhesive which is continuous in the axial direction. As the adhesive used for connecting, for example, bisphenol type epoxy, epoxy phenol,
There are butadiene-acrylonitrile, silicone, modified silicone and the like.
実施例 第1図は第2図に示すような構造の非電導性で耐熱性
を有する連結部材2を上下及び前後からコイル3に嵌込
んでコイルが軸方向に動かないように連結した例を示す
もので、第3図は上述するように連結部材2により連結
したコイル3をインサート成形により一体成形したエレ
クトロフュージョン継手を示すものである。Example FIG. 1 shows an example in which a non-conductive and heat-resistant connecting member 2 having a structure as shown in FIG. 2 is fitted into a coil 3 from above and below and from the front and back so that the coil does not move in the axial direction. FIG. 3 shows an electrofusion joint in which the coil 3 connected by the connecting member 2 as described above is integrally formed by insert molding.
第4図はコイル7の上下及び前後から連結部材6を当
てがって耐熱性を有する接着剤8で接着し連結した例を
示すもので、第5図はかゝるコイル7を一体成形したエ
レクトロフュージョン継手を示す。ここで連結部材6は
好ましくは非電導性をなすが、コイル7と非接触でその
間に接着剤を十分に介在させるようにすれば、非電導性
でなくてもよい。FIG. 4 shows an example in which the connecting member 6 is applied from above and below and to the front and back of the coil 7 and is adhered and connected by a heat-resistant adhesive 8. In FIG. 5, such a coil 7 is integrally formed. 3 shows an electrofusion joint. Here, the connecting member 6 is preferably non-conductive, but may not be non-conductive as long as it is in non-contact with the coil 7 and a sufficient adhesive agent is interposed therebetween.
第6図はコイル12にプラスチック製のスリーブ13を嵌
挿し、上下及び前後の四か所において耐熱性を有する接
着剤11を塗布し、スリーブ上にコイル12を連結した例を
示すもので、第7図はこれを一体成形したエレクトロフ
ュージョン継手を示す。なおスリーブ13はインサート成
形時に溶融され、一体化される。FIG. 6 shows an example in which a plastic sleeve 13 is fitted into the coil 12, and a heat-resistant adhesive 11 is applied to the upper, lower, front and rear portions of the coil 12, and the coil 12 is connected to the sleeve. FIG. 7 shows an electrofusion joint in which this is integrally molded. The sleeve 13 is melted and integrated at the time of insert molding.
考案の効果 本考案のエレクトロフュージョン継手によれば、埋設
されたコイルは軸方向に動かないように固定されてお
り、溶融樹脂の流れにより流されたり、コイル自体の捩
れにより移動してショートすることがなく、ピッチが当
初のピッチで維持されるため発熱密度が均一化し、溶融
不良を来すことがなくなる。Effect of the Invention According to the electrofusion joint of the present invention, the embedded coil is fixed so as not to move in the axial direction, and the flow may be caused by the flow of the molten resin, or the coil itself may be twisted to cause a short circuit. Since the pitch is maintained at the initial pitch, the heat generation density becomes uniform, and melting failure does not occur.
第1図は連結部材で連結したコイルの断面図、第2図は
連結部材の部分拡大図、第3図は第1図に示すコイルを
埋設したエレクトロフュージョン継手の断面図、第4図
は別の態様のコイルの断面図、第5図は第4図に示すコ
イルを埋設したエレクトロフュージョン継手の断面図、
第6図は一部を切欠いた正面図、第7図は第6図に示す
コイルを埋設したエレクトロフュージョン継手の断面
図、第8図はプラスチック管を連結した時の状態を示す
従来のエレクトロフュージョン継手の断面図である。 1……溝、2……連結部材、3、7、12……コイル 6……連結部材、8、11……接着剤1 is a sectional view of a coil connected by a connecting member, FIG. 2 is a partially enlarged view of the connecting member, FIG. 3 is a sectional view of an electrofusion joint in which the coil shown in FIG. 1 is embedded, and FIG. FIG. 5 is a cross-sectional view of the coil of the embodiment, FIG. 5 is a cross-sectional view of the electrofusion joint in which the coil shown in FIG. 4 is embedded,
FIG. 6 is a partially cutaway front view, FIG. 7 is a sectional view of an electrofusion joint in which the coil shown in FIG. 6 is embedded, and FIG. 8 is a conventional electrofusion showing a state in which plastic pipes are connected. It is sectional drawing of a joint. 1 ... Groove, 2 ... Connection member, 3, 7, 12 ... Coil 6 ... Connection member, 8, 11 ... Adhesive
Claims (1)
通電してプラスチック管との接触面を加熱溶融すること
により融着するエレクトロフュージョン継手において、
加熱溶融時に電熱線が軸方向に移動するのを防止するた
めに、上記コイル状の電熱線を下記(1)〜(4)のい
づれか一つの連結手段によって連結し、固定状態とした
ことを特徴とするエレクトロフュージョン継手。 (1)継手の軸方向に延びる板状部材であって、非電導
性で耐熱性を有し、その一方側にコイル3と同一ピッチ
でコイル3の嵌まる溝1を形成した連結部材2よりな
り、該部材2の各溝にコイル3を嵌合させることによっ
てコイルを連結する手段。 (2)継手の軸方向に延びる棒状部材であって、耐熱性
を有する連結部材6と、非電導性で耐熱性を有し、連結
部材6にコイル7を連結する接着剤8とよりなり、コイ
ル7を連結部材6に接着剤8を介して連結する手段。 (3)継手の軸方向に延びる棒状部材であって、非電導
性で耐熱性を有する連結部材6と、耐熱性を有し、連結
部材6にコイル7を連結する接着剤8とよりなり、コイ
ル7を連結部材6に接着剤8を介して連結する手段。 (4)熱溶融性プラスチック製スリーブ13上にコイル12
を軸方向に連なる非電導性で耐熱性を有する帯状接着剤
を介して連結する手段。1. An electrofusion joint in which a coil-shaped heating wire is embedded inside, and electric current is applied to the heating wire to heat and melt the contact surface with a plastic tube to thereby fuse the electrofusion joint,
In order to prevent the heating wire from moving in the axial direction during heating and melting, the coiled heating wire is connected by any one of the following connecting means (1) to (4) to be in a fixed state. And an electrofusion joint. (1) A connecting member 2 that is a plate-shaped member that extends in the axial direction of the joint, has non-conductivity and heat resistance, and has a groove 1 into which the coil 3 fits at the same pitch as the coil 3 on one side thereof. And means for connecting the coils by fitting the coils 3 into the respective grooves of the member 2. (2) A rod-shaped member extending in the axial direction of the joint, which is composed of a heat-resistant connecting member 6 and an adhesive 8 which is non-conductive and heat-resistant and connects the coil 7 to the connecting member 6. Means for connecting the coil 7 to the connecting member 6 via the adhesive 8. (3) A rod-shaped member that extends in the axial direction of the joint, and is composed of a non-conductive and heat-resistant connecting member 6 and an adhesive 8 that has heat resistance and connects the coil 7 to the connecting member 6. Means for connecting the coil 7 to the connecting member 6 via the adhesive 8. (4) Coil 12 on heat-meltable plastic sleeve 13
Means for connecting the two via an adhesive, which is non-conductive and has heat resistance and which is continuous in the axial direction.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1987160582U JP2516996Y2 (en) | 1987-10-19 | 1987-10-19 | Electrofusion fittings |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1987160582U JP2516996Y2 (en) | 1987-10-19 | 1987-10-19 | Electrofusion fittings |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0163894U JPH0163894U (en) | 1989-04-24 |
JP2516996Y2 true JP2516996Y2 (en) | 1996-11-13 |
Family
ID=31442771
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1987160582U Expired - Lifetime JP2516996Y2 (en) | 1987-10-19 | 1987-10-19 | Electrofusion fittings |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2516996Y2 (en) |
-
1987
- 1987-10-19 JP JP1987160582U patent/JP2516996Y2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0163894U (en) | 1989-04-24 |
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