JPH048994A - Electrofusion joint - Google Patents
Electrofusion jointInfo
- Publication number
- JPH048994A JPH048994A JP2111336A JP11133690A JPH048994A JP H048994 A JPH048994 A JP H048994A JP 2111336 A JP2111336 A JP 2111336A JP 11133690 A JP11133690 A JP 11133690A JP H048994 A JPH048994 A JP H048994A
- Authority
- JP
- Japan
- Prior art keywords
- resistance wire
- synthetic resin
- cylindrical body
- connector pin
- wire
- 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.)
- Pending
Links
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 46
- 239000000057 synthetic resin Substances 0.000 claims abstract description 46
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 22
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 13
- 230000008018 melting Effects 0.000 claims abstract description 11
- 238000002844 melting Methods 0.000 claims abstract description 11
- 230000002093 peripheral effect Effects 0.000 claims description 12
- 239000011810 insulating material Substances 0.000 claims description 9
- 229920005989 resin Polymers 0.000 abstract description 9
- 239000011347 resin Substances 0.000 abstract description 9
- 229910018487 Ni—Cr Inorganic materials 0.000 abstract 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 abstract 1
- -1 polyethylene Polymers 0.000 description 5
- 239000004698 Polyethylene Substances 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- 239000000155 melt Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004962 Polyamide-imide Substances 0.000 description 1
- 239000004695 Polyether sulfone Substances 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910001120 nichrome Inorganic materials 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920002312 polyamide-imide Polymers 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
- B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
- B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
- B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/52—Joining tubular articles, bars or profiled elements
- B29C66/522—Joining tubular articles
- B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/52—Joining tubular articles, bars or profiled elements
- B29C66/522—Joining tubular articles
- B29C66/5229—Joining tubular articles involving the use of a socket
- B29C66/52291—Joining tubular articles involving the use of a socket said socket comprising a stop
- B29C66/52292—Joining tubular articles involving the use of a socket said socket comprising a stop said stop being internal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/3468—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the means for supplying heat to said heated elements which remain in the join, e.g. special electrical connectors of windings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
- B29C65/3476—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Branch Pipes, Bends, And The Like (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はエレクトロフュージョン継手に５ｆｌｌＬ、更
に詳しくは、熱可塑性合成樹脂製の筒状体の内周面に抵
抗線をスパイラル状に配設してあり、この筒状体とこれ
に嵌入したガスまたは上下水道用の熱可塑性合成樹脂製
管とを溶融して接続するためのエレクトロフュージョン
継手に関するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides an electrofusion joint with a resistance wire spirally arranged on the inner circumferential surface of a cylindrical body made of thermoplastic synthetic resin. The present invention relates to an electrofusion joint for melting and connecting this cylindrical body to a thermoplastic synthetic resin pipe for gas or water and sewage systems fitted into the cylindrical body.
ガスまたは上下水道に用いられるポリエチレン等熱可塑
性合成樹脂製の管体を接続するエレクトロフュージョン
継手としては、熱可塑性合成樹脂製の筒状体の内周面に
、該筒状体と同じ合成樹脂材により被覆した抵抗線また
は被覆していない抵抗線を所定のピッチでスパイラル状
に埋込んであり、該筒状体に管体を嵌入した後に、抵抗
線を発熱させて筒状体の内周面と管体の外周面とを溶融
し接続するものが、従来から知られている。As an electrofusion joint that connects pipe bodies made of thermoplastic synthetic resin such as polyethylene used for gas or water and sewage systems, the inner circumferential surface of a cylindrical body made of thermoplastic synthetic resin is coated with the same synthetic resin material as the cylindrical body. Resistance wires coated or uncoated are embedded in a spiral shape at a predetermined pitch, and after the tube is inserted into the cylindrical body, the resistance wires are heated to heat the inner peripheral surface of the cylindrical body. Conventionally, it has been known to melt and connect the outer peripheral surface of the tube and the outer peripheral surface of the tube.
旧記従来のエレクトロフュージョン継手にあっては、抵
抗線を発熱させて筒状体の内周面と管体の外周面とを溶
融したとき、溶融樹脂が膨張して圧力が上り、そのため
に溶融樹脂が継手の開口端側へ流れ動き、それに従って
抵抗線も溶融樹脂と一緒に継手の開口端側へ移動する。In conventional electrofusion joints, when the resistance wire generates heat and melts the inner circumferential surface of the cylindrical body and the outer circumferential surface of the tube body, the molten resin expands and pressure rises, which causes the molten resin to expand. flows toward the open end of the joint, and the resistance wire accordingly moves together with the molten resin toward the open end of the joint.
一方、コネクターピン及びこれに接続された抵抗線の端
部側は継手の開口端側に移動しないので、上記の如く移
動してきた隣接する抵抗線がコネクターピンの下端部や
これに接続された抵抗線の端部側に接触してショートが
発生していた。ショートすると、抵抗線の発熱量が所定
以上に多くなり、合成樹脂が劣化するという問題点を有
していた。On the other hand, since the end of the connector pin and the resistance wire connected to it do not move toward the open end of the joint, the adjacent resistance wire that has moved as described above will move to the lower end of the connector pin and the resistance wire connected to it. A short circuit occurred due to contact with the end of the wire. When short-circuited, the amount of heat generated by the resistance wire increases beyond a predetermined value, which causes the synthetic resin to deteriorate.
本発明は、抵抗線が溶融樹脂と一緒に継手の開口端側に
移動した場合でも、ショートが発生しないように構成し
たエレクトロフュージョン継手を提供するものである。The present invention provides an electrofusion joint configured to prevent short-circuiting even if the resistance wire moves to the open end side of the joint together with the molten resin.
本発明のエレクトロフュージョン継手は、！可塑性合成
樹脂製の筒状体の内周面に抵抗線を所定のピッチでスパ
イラル状に配設すると共に、抵抗線の端部を筒状体に設
けたコネクターピンに接続し、該抵抗線を所定の電力付
勢し発熱させて筒状体とこれに嵌入した熱可塑性合成樹
脂製管とを溶着接続するもので、上記コネクターピンの
下端部またはコネクターピンに近接した位置の抵抗線を
、筒状体の合成樹脂よりも融点の高い合成樹脂材で被覆
してあることを特徴としている。この合成樹脂材に換え
不溶融の絶縁材によって、コネクターピンの下端部また
はコネクターピンに近接した位置の抵抗線を被覆してあ
ってもよい。The electrofusion fitting of the present invention is! A resistance wire is arranged in a spiral shape at a predetermined pitch on the inner peripheral surface of a cylindrical body made of plastic synthetic resin, and the end of the resistance wire is connected to a connector pin provided on the cylindrical body. The cylindrical body and the thermoplastic synthetic resin tube fitted into the cylindrical body are welded and connected by applying a predetermined electric power to generate heat. It is characterized by being coated with a synthetic resin material that has a higher melting point than the synthetic resin of the body. Instead of this synthetic resin material, the lower end of the connector pin or the resistance wire at a position close to the connector pin may be covered with an infusible insulating material.
また、少なくとも上記抵抗線の端部側を隣接する抵抗線
から隔離してコネクターピンの下端部に接続してあるこ
とを特徴としている。Further, at least the end portion of the resistance wire is isolated from the adjacent resistance wire and connected to the lower end portion of the connector pin.
なお、コネクターピンに接続する抵抗線の端部側を他の
抵抗線に比してピッチを広く配設してもよい。Note that the end portions of the resistance wires connected to the connector pins may be arranged with a wider pitch than other resistance wires.
本発明に係るエレクトロフュージョン継手においては、
抵抗線に所定の電力付勢し、その発熱によって筒状体の
内周面とこれに嵌入した熱可塑性合成樹脂製管の外周面
が溶融しても、コネクターピンの下端部または抵抗線の
端部側を被覆している合成樹脂材または絶縁材は不溶融
の状態を保つ。In the electrofusion joint according to the present invention,
Even if the resistance wire is energized with a certain amount of power and the heat generated melts the inner peripheral surface of the cylindrical body and the outer peripheral surface of the thermoplastic synthetic resin tube fitted into it, the lower end of the connector pin or the end of the resistance wire The synthetic resin material or insulating material covering the side remains unmelted.
また、抵抗線が溶融樹脂と共に継手の開口端側に移動し
てきても、コネクターピンに接続した抵抗線の下端部側
は隣接する抵抗線と離れているから、接触することがな
い。Further, even if the resistance wire moves to the open end side of the joint together with the molten resin, the lower end side of the resistance wire connected to the connector pin is separated from the adjacent resistance wire, so that it does not come into contact with the adjacent resistance wire.
次に本発明の実施例を添附の図面において説明する。 Embodiments of the invention will now be described with reference to the accompanying drawings.
第１図は本発明のエレクトロフュージョン継手により熱
可塑性合成樹脂製管を接続する状態の断面図、第２図は
別の実施例を示しくイ）は主要部分の断面図、（１：ｒ
）はその説＃１図、第３図はヌＩＩの発明に係るエレク
トロフュージョン継手を示しくイ）は主要部分の断面図
、（ロ）はその説明図である。Fig. 1 is a sectional view of thermoplastic synthetic resin pipes connected by the electrofusion joint of the present invention, Fig. 2 shows another embodiment.
) shows the theory #1, FIG. 3 shows the electrofusion joint according to the invention of Nu II, a) is a sectional view of the main part, and (b) is an explanatory view thereof.
本発明のエレクトロフュージョン継手ｌは、第１図に示
す如く、熱可塑性合成樹脂例えばポリエチレンからなる
筒状体２で、熱可塑性合成樹脂製管３，４を溶着接続す
るものである。これら管３．４は、例えばポリエチレン
からなり、都市ガス等を輸送するために地中に埋設され
るもので、これらを接続するときは各端部をエレクトロ
フュージョン継手１の筒状体２に継手の開口端側から嵌
入する。このエレクトロフュージョン継手ｌの筒状体２
の内周面にはニクロム線、ステンレス線等からなる抵抗
線５を所定のピッチでスパイラル状に配設しである。ま
た、筒状体２の外面端部にはソケット６とコネクターピ
ン７とが設けられており、このコネクターピン７に上記
抵抗線５の端部が接続されている。しかも、抵抗線５は
コネクターピン７を介して電源及び電圧調整装置（いず
れも図示せず）に直列に接続されており、抵抗線５を所
定の電力付勢し発熱させて筒状体２とこれに嵌入した熱
可塑性合成樹脂製管３．４を溶着接続するものである。As shown in FIG. 1, the electrofusion joint 1 of the present invention is a cylindrical body 2 made of a thermoplastic synthetic resin, such as polyethylene, and is used to weld and connect thermoplastic synthetic resin pipes 3 and 4. These pipes 3.4 are made of polyethylene, for example, and are buried underground to transport city gas, etc. When connecting them, each end is connected to the cylindrical body 2 of the electrofusion joint 1. Insert from the open end side. Cylindrical body 2 of this electrofusion joint l
Resistance wires 5 made of nichrome wire, stainless steel wire, etc. are spirally arranged at a predetermined pitch on the inner peripheral surface of the wire. Further, a socket 6 and a connector pin 7 are provided at the outer end of the cylindrical body 2, and the end of the resistance wire 5 is connected to the connector pin 7. Moreover, the resistance wire 5 is connected in series to a power source and a voltage regulator (none of which are shown) via a connector pin 7, and the resistance wire 5 is energized with a predetermined power to generate heat and connect to the cylindrical body 2. A thermoplastic synthetic resin tube 3.4 fitted into this is welded and connected.
この抵抗線５を接続するコネクターピン７の下端部を、
筒状体２の合成樹脂よりも融点の高い合成樹脂材８で被
覆しである。融点の高い合成樹脂材８としては１例えば
筒状体２がポリエチレンで構成しである場合、ポリアミ
ド、ポリアミドイミド、ポリエーテルエーテルケトン、
ポリエーテルスルホン、ポリエチレンテレフタレート、
ポリフェニレンサルファイド等がある。また、これら融
点の高い合成樹脂材８に換えて、不溶融の絶縁材８によ
りコネクターピン７の下端部を被覆してあってもよい、
不溶融の絶縁材８としては種々あるが、セラミックが好
適である。The lower end of the connector pin 7 to which this resistance wire 5 is connected is
It is coated with a synthetic resin material 8 having a higher melting point than the synthetic resin of the cylindrical body 2. Examples of the synthetic resin material 8 having a high melting point include polyamide, polyamideimide, polyetheretherketone, when the cylindrical body 2 is made of polyethylene.
polyether sulfone, polyethylene terephthalate,
Examples include polyphenylene sulfide. Further, instead of the synthetic resin material 8 having a high melting point, the lower end of the connector pin 7 may be covered with an infusible insulating material 8.
Although there are various types of infusible insulating material 8, ceramic is suitable.
第２図は別の実施例で、コネクターピン７に近接した位
この抵抗線５を、上記のような筒状体２の合成樹脂より
も融点の高い合成樹脂材８、または不溶融の絶縁材８に
より被覆したものである。FIG. 2 shows another embodiment in which the resistance wire 5 close to the connector pin 7 is made of a synthetic resin material 8 having a higher melting point than the synthetic resin of the cylindrical body 2, or an infusible insulating material. 8.
コネクターピン７に近接した位ととしては、コネクター
ピン７に接続する抵抗！１１５の端部側及びコネクター
ピン７に隣接する抵抗線５の一部分が相当する。しかし
、これに限らない、熱可塑性合成樹脂製管３．４の溶着
接続に支障がなく、しがも、溶融樹脂の移動に伴ない抵
抗線５が継手の開口端側に移動した場合でもショートし
ない範囲であればよい。A resistor connected to connector pin 7 is close to connector pin 7! 115 and a portion of the resistance wire 5 adjacent to the connector pin 7 corresponds. However, the welding connection of the thermoplastic synthetic resin pipe 3.4 is not limited to this, and even if the resistance wire 5 moves to the open end side of the joint due to the movement of the molten resin, a short circuit occurs. It is fine as long as it does not.
上述のような本発明においては、筒状体２に熱可塑性合
成樹脂製管３．４を嵌入し、抵抗＆１５に所定の電流を
流し発熱させる。そうすると筒状体２の内周面及び熱可
塑性合成樹脂製管３．４の外周面が加熱されて溶融し、
それらが一体重に溶着接続される。そのこの際、コネク
ターピン７の下端部または抵抗線５の端部側を被覆して
いる合成樹脂材８や絶縁材８は溶融せずに不溶融の状態
を保っている。In the present invention as described above, the thermoplastic synthetic resin tube 3.4 is fitted into the cylindrical body 2, and a predetermined current is passed through the resistor &15 to generate heat. Then, the inner peripheral surface of the cylindrical body 2 and the outer peripheral surface of the thermoplastic synthetic resin tube 3.4 are heated and melted.
They are welded and connected in one piece. At this time, the synthetic resin material 8 and the insulating material 8 covering the lower end of the connector pin 7 or the end of the resistance wire 5 remain unmelted.
第３図は別の発明で、抵抗線５の端部側を隣接する抵抗
線５から隔離してコネクターピン７の下端部に接続した
ものである。抵抗線５の端部側を隔離するには、該端部
側と隣接する抵抗線５との間に、筒状体２と同じ合成樹
脂からなる略三角形状のスペーサー（図示せず）を介装
しておき、射出成形すればよい、具体例としては、内径
が８７厘層の筒状体２の内周面に直径が０．６５ｍｍの
抵抗線５をスパイラル状に配設する場合、第３図に示す
如く、抵抗線５のピッ千Ｐを１．９５厘層とし、コネク
ターピン７の下端部と隣接する抵抗ｍ５の間隔りを３．
５腸璽程度に設定するとよい、また、図示していないが
、抵抗線５の端部側を他の抵抗線５に比ベピッチが広く
なるように予じめ巻回しておき、射出成形することも可
能である。この発明においては、コネクターピン７に接
続しである抵抗線５の端部側が隣接する抵抗線５と離れ
ているから、隣接する抵抗線５が溶融樹脂と共に継手の
開口端側に移動してきても抵抗線５の端部側には接触し
ない。FIG. 3 shows another invention in which the end side of the resistance wire 5 is separated from the adjacent resistance wire 5 and connected to the lower end of the connector pin 7. In order to isolate the end side of the resistance wire 5, a substantially triangular spacer (not shown) made of the same synthetic resin as the cylindrical body 2 is interposed between the end side and the adjacent resistance wire 5. As a specific example, when a resistance wire 5 with a diameter of 0.65 mm is arranged in a spiral shape on the inner peripheral surface of a cylindrical body 2 with an inner diameter of 87 layers, As shown in FIG. 3, the pitch of the resistance wire 5 is set to 1.95 layers, and the distance between the lower end of the connector pin 7 and the adjacent resistor m5 is set to 3.
It is preferable to set the resistance wire 5 to approximately 5 mm.Also, although not shown, the end side of the resistance wire 5 may be wound in advance so that the pitch is wider compared to other resistance wires 5, and then injection molded. is also possible. In this invention, since the end side of the resistance wire 5 connected to the connector pin 7 is separated from the adjacent resistance wire 5, even if the adjacent resistance wire 5 moves to the open end side of the joint together with the molten resin. It does not touch the end side of the resistance wire 5.
以−Ｅのように本発明のエレクトロフュージョン継手に
よれば、抵抗線に所定の電力付勢し、その発熱によって
筒状体の内周面とこれに嵌入した熱可塑性合成樹脂製管
の外周面が溶融しても、コネクターピンの下端部または
抵抗線の端部側を被覆している合成樹脂材または絶縁材
は不溶融の状態を保つので、ショートが発生しない。As shown in E below, according to the electrofusion joint of the present invention, the resistance wire is energized with a predetermined electric power, and the generated heat causes the inner circumferential surface of the cylindrical body and the outer circumferential surface of the thermoplastic synthetic resin tube fitted therein to be heated. Even if the wire melts, the synthetic resin material or insulating material covering the lower end of the connector pin or the end of the resistance wire remains unmelted, so no short circuit occurs.
また、抵抗線が溶融樹脂と共に継手の開口端側に移動し
てきても、コネクターピンに接続した抵抗線の下端部側
は隣接する抵抗線と接触することがないのでショートせ
ず、溶着接続した部分の合成樹脂が劣化するのを防ぎ、
熱可塑性合成樹脂製管を確実に溶着接続できるエレクト
ロフュージョン継手である。In addition, even if the resistance wire moves to the open end of the joint together with the molten resin, the lower end of the resistance wire connected to the connector pin will not come into contact with the adjacent resistance wire, so there will be no short circuit, and the welded and connected portion Prevents the synthetic resin from deteriorating,
This is an electrofusion joint that can reliably weld and connect thermoplastic synthetic resin pipes.
第１図は本発明のエレクトロフュージョン継手により熱
可塑性合成樹脂製管を接続する状態の断面図、第２図は
別の実施例を示しくイ）は主要部分の断面図、（ロ）は
その説明図、第３図は別の発明に係るエレクトロフュー
ジョン継手を示しくイ）は主要部分の断面図、（ロ）は
その説明図である。
図中１はエレクトロフュージョン継手、２は筒状体、３
及び４は熱可塑性合成樹脂製管、５ｔ±抵抗線、７はコ
ネクターピン、８は融点の高１／）合成樹脂材（不溶融
の絶縁材）を示す。Figure 1 is a cross-sectional view of thermoplastic synthetic resin pipes being connected using the electrofusion joint of the present invention, Figure 2 shows another embodiment. Explanatory drawings and FIG. 3 show an electrofusion joint according to another invention, A) is a sectional view of the main part, and FIG. 3 is an explanatory view thereof. In the figure, 1 is an electrofusion joint, 2 is a cylindrical body, and 3
and 4 are thermoplastic synthetic resin tubes, 5t±resistance wires, 7 are connector pins, and 8 is a high melting point 1/) synthetic resin material (non-melting insulating material).
Claims (2)
所定のピッチでスパイラル状に配設すると共に、抵抗線
の端部を筒状体に設けたコネクターピンに接続し、該抵
抗線を所定の電力付勢し発熱させて筒状体とこれに嵌入
した熱可塑性合成樹脂製管とを溶着接続するエレクトロ
フュージョン継手において、上記コネクターピンの下端
部またはコネクターピンに近接した位置の抵抗線を、筒
状体の合成樹脂よりも融点の高い合成樹脂材または不溶
融の絶縁材により被覆してあることを特徴とするエレク
トロフュージョン継手。(1) A resistance wire is arranged in a spiral shape at a predetermined pitch on the inner peripheral surface of a cylindrical body made of thermoplastic synthetic resin, and the end of the resistance wire is connected to a connector pin provided on the cylindrical body, In an electrofusion joint in which the resistance wire is energized with a predetermined power to generate heat to weld and connect a cylindrical body and a thermoplastic synthetic resin tube fitted therein, the lower end of the connector pin or a position close to the connector pin is used. An electrofusion joint characterized in that the resistance wire is covered with a synthetic resin material having a higher melting point than the synthetic resin of the cylindrical body or an infusible insulating material.
所定のピッチでスパイラル状に配設すると共に、抵抗線
の端部を筒状体に設けたコネクターピンに接続し、該抵
抗線を所定の電力付勢し発熱させて筒状体とこれに嵌入
した熱可塑性合成樹脂製管とを溶着接続するエレクトロ
フュージョン継手において、上記抵抗線の端部側を隣接
する抵抗線から隔離してコネクターピンの下端部に接続
してあることを特徴とするエレクトロフュージョン継手
。(2) A resistance wire is arranged in a spiral shape at a predetermined pitch on the inner peripheral surface of a cylindrical body made of thermoplastic synthetic resin, and the end of the resistance wire is connected to a connector pin provided on the cylindrical body, In an electrofusion joint in which the resistance wire is energized with a predetermined power to generate heat to weld and connect a cylindrical body and a thermoplastic synthetic resin pipe fitted therein, the end side of the resistance wire is connected to the adjacent resistance wire. An electrofusion joint characterized in that it is isolated and connected to the lower end of a connector pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2111336A JPH048994A (en) | 1990-04-26 | 1990-04-26 | Electrofusion joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2111336A JPH048994A (en) | 1990-04-26 | 1990-04-26 | Electrofusion joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH048994A true JPH048994A (en) | 1992-01-13 |
Family
ID=14558619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2111336A Pending JPH048994A (en) | 1990-04-26 | 1990-04-26 | Electrofusion joint |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH048994A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4955797A (en) * | 1989-02-15 | 1990-09-11 | Tecumseh Products Company | Valve indexing for a compressor |
| US5832123A (en) * | 1995-11-24 | 1998-11-03 | Kokusai Electric Co., Ltd. | Method and apparatus for producing an enhanced two-grayscale image |
| JP2006329360A (en) * | 2005-05-27 | 2006-12-07 | Hitachi Metals Ltd | Electric fusion joint, manufacturing method thereof and winding device |
| JPWO2008149409A1 (en) * | 2007-05-29 | 2010-08-19 | 三菱電機株式会社 | Connecting the elevator rope |
| WO2021065776A1 (en) * | 2019-09-30 | 2021-04-08 | 積水化学工業株式会社 | Electrically fusion bonded joint |
-
1990
- 1990-04-26 JP JP2111336A patent/JPH048994A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4955797A (en) * | 1989-02-15 | 1990-09-11 | Tecumseh Products Company | Valve indexing for a compressor |
| US5832123A (en) * | 1995-11-24 | 1998-11-03 | Kokusai Electric Co., Ltd. | Method and apparatus for producing an enhanced two-grayscale image |
| JP2006329360A (en) * | 2005-05-27 | 2006-12-07 | Hitachi Metals Ltd | Electric fusion joint, manufacturing method thereof and winding device |
| JPWO2008149409A1 (en) * | 2007-05-29 | 2010-08-19 | 三菱電機株式会社 | Connecting the elevator rope |
| JP5089689B2 (en) * | 2007-05-29 | 2012-12-05 | 三菱電機株式会社 | Connecting the elevator rope |
| WO2021065776A1 (en) * | 2019-09-30 | 2021-04-08 | 積水化学工業株式会社 | Electrically fusion bonded joint |
| JPWO2021065776A1 (en) * | 2019-09-30 | 2021-04-08 | ||
| CN114466987A (en) * | 2019-09-30 | 2022-05-10 | 积水化学工业株式会社 | Electric melting joint |
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