JPH08240294A - Branched joint for electrically fused connection - Google Patents

Branched joint for electrically fused connection

Info

Publication number
JPH08240294A
JPH08240294A JP7045718A JP4571895A JPH08240294A JP H08240294 A JPH08240294 A JP H08240294A JP 7045718 A JP7045718 A JP 7045718A JP 4571895 A JP4571895 A JP 4571895A JP H08240294 A JPH08240294 A JP H08240294A
Authority
JP
Japan
Prior art keywords
saddle
outer peripheral
joint
main pipe
pipe
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
Application number
JP7045718A
Other languages
Japanese (ja)
Inventor
Ryuichiro Nakamura
隆一郎 中村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Plastics Inc
Original Assignee
Mitsubishi Plastics Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Plastics Inc filed Critical Mitsubishi Plastics Inc
Priority to JP7045718A priority Critical patent/JPH08240294A/en
Publication of JPH08240294A publication Critical patent/JPH08240294A/en
Pending legal-status Critical Current

Links

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
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • 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
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • 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
    • B29C66/5224—Joining tubular articles for forming fork-shaped connections, e.g. for making Y-shaped pieces
    • B29C66/52241—Joining tubular articles for forming fork-shaped connections, e.g. for making Y-shaped pieces with two right angles, e.g. for making T-shaped pieces
    • 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
    • B29C66/52296—Joining tubular articles involving the use of a socket said socket comprising sealing elements, e.g. gaskets

Abstract

PURPOSE: To provide a branched pipe joint for an electrically fused connection, ensuring the rear side of a saddle to be firmly fused and jointed to the external surface of a main pipe for preventing a fluid in the pipe to ooze or leak. CONSTITUTION: Annular grooves 13a and 13b are formed on the inner or outer peripheral position of the reverse side of a saddle 11 having an electrical heating wire 2 buried, and seal packings 3 are coupled to the annular grooves 13a and 13b. As a result, the reverse side of the saddle 11 and the external surface of a main pipe are firmly fused and jointed to each other, thereby ensuring a fluid in the pipe to be prevented from oozing or leaking.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、略半円弧状に湾曲した
サドルの上面から枝管が一体的に突出し、またサドルの
裏面に電熱線が所定間隔で渦巻状に埋設された電気融着
用分岐管継手に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to electric fusion welding in which a branch pipe integrally projects from the upper surface of a saddle curved in a substantially semi-circular shape, and heating wires are spirally embedded at a predetermined interval on the back surface of the saddle. The present invention relates to a branch pipe joint.

【０００２】[0002]

【従来の技術】従来からガス管、給湯管等の合成樹脂管
を接続する場合、図３に半断面図で示した如く、略半円
弧状に湾曲したサドル１１の上面から枝管１２が一体的
に突出し、またサドル１１の裏面に電熱線２が所定間隔
で渦巻状に埋設された電気融着用分岐管継手が使用され
ている。2. Description of the Related Art Conventionally, when connecting a synthetic resin pipe such as a gas pipe or a hot water supply pipe, a branch pipe 12 is integrally formed from the upper surface of a saddle 11 which is curved in a substantially semi-circular shape, as shown in a half sectional view in FIG. The branch pipe joint for electric fusion welding is used in which the heating wire 2 is spirally embedded in the back surface of the saddle 11 at predetermined intervals.

【０００３】[0003]

【発明が解決しようとする課題】ところで、この分岐管
継手を合成樹脂製本管に融着接合するとき、クランプ工
具等を用いてサドル裏面を本管外周面に押し付け、サド
ル裏面に埋設された電熱線に通電して融着接合している
が、サドル裏面の内周部や外周部が本管外周面と密着し
ないことによって融着不良が発生することがあった。By the way, when the branch pipe joint is fusion-bonded to the synthetic resin main pipe, the back surface of the saddle is pressed against the outer peripheral surface of the main pipe by using a clamp tool or the like, and the electric wire embedded in the back surface of the saddle is pressed. Although the hot wire is energized to perform fusion bonding, defective fusion may occur due to the inner peripheral portion and outer peripheral portion of the back surface of the saddle not adhering to the outer peripheral surface of the main pipe.

【０００４】即ち、分岐管継手と本管は、いずれもポリ
エチレン，ポリプロピレン，ポリブテン等の合成樹脂か
らなるため変形し易く、図４に要部拡大断面図で示した
如く、サドル裏面の内周部や外周部に隙間Ａが発生する
ことがある。この隙間Ａが存在する状態で電熱線を発熱
させると、サドル裏面と本管外周面の樹脂が溶融すると
共に熱膨張して隙間Ａの方向に逃げる。このため、サド
ル裏面と本管外周面との接合面に界面圧力が立たず、所
望の融着強度が得られないことがあった。That is, since the branch pipe joint and the main pipe are both made of synthetic resin such as polyethylene, polypropylene and polybutene, they are easily deformed. As shown in the enlarged cross-sectional view of the main part of FIG. A gap A may occur in the outer peripheral portion. When the heating wire is caused to generate heat in the presence of the gap A, the resin on the rear surface of the saddle and the outer peripheral surface of the main pipe are melted and thermally expanded to escape in the direction of the gap A. For this reason, the interfacial pressure does not rise on the joint surface between the rear surface of the saddle and the outer peripheral surface of the main pipe, and the desired fusion strength may not be obtained.

【０００５】また、サドル裏面と本管外周面との接合面
から溶融樹脂が逃げまま冷却されると、溶融樹脂が収縮
することによって接合面の近傍に真空ボイドが発生する
ことがある。この様にしてサドル裏面と本管外周面との
接合面に融着不良部が存在すると、この部分を起点とし
て亀裂が発生し、管内流体が染み出したり、漏洩する危
険性があった。Further, if the molten resin is cooled while it escapes from the joint surface between the rear surface of the saddle and the outer peripheral surface of the main pipe, the molten resin contracts, so that a vacuum void may occur near the joint surface. In this way, if there is a defective fusion-bonding portion on the joint surface between the rear surface of the saddle and the outer peripheral surface of the main pipe, cracks may occur starting from this portion, and the fluid in the pipe may leak or leak.

【０００６】本発明はかかる課題を解決したものであっ
て、サドル裏面が本管外周面と強固に融着接合して管内
流体が染み出したり、漏洩することのない電気融着用分
岐管継手を提供するものである。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides an electric fusion branch pipe joint in which the back surface of the saddle is firmly fusion-bonded to the outer peripheral surface of the main pipe so that the fluid in the pipe does not exude or leak. It is provided.

【０００７】[0007]

【課題を解決するための手段】本発明は、電熱線が埋設
されたサドル裏面の内周部、又は外周部に環状溝を設
け、該環状溝にシールパッキンを装着したことを特徴と
する。The present invention is characterized in that an annular groove is provided in an inner peripheral portion or an outer peripheral portion of a back surface of a saddle in which a heating wire is buried, and a seal packing is attached to the annular groove.

【０００８】[0008]

【作用】サドル裏面の内周部、又は外周部にシールパッ
キンを装着したので、サドル裏面を本管外周面に押し付
けて電熱線を発熱させたとき、溶融樹脂は接合面の間か
ら逃げ出すことなく封じ込められる。このため、サドル
裏面と本管外周面とが相互に加圧された状態で強固に融
着接合する。また、サドル裏面と本管外周面との接合面
から溶融樹脂が逃げないので、溶融樹脂が固化するとき
接合面の近傍に真空ボイドが発生しない。[Function] Since the seal packing is attached to the inner or outer circumference of the back surface of the saddle, the molten resin does not escape from between the joint surfaces when the back surface of the saddle is pressed against the outer surface of the main pipe to generate heat. Be contained. Therefore, the rear surface of the saddle and the outer peripheral surface of the main pipe are firmly fusion-bonded to each other in a state of being pressed against each other. Further, since the molten resin does not escape from the joint surface between the back surface of the saddle and the outer peripheral surface of the main pipe, a vacuum void does not occur near the joint surface when the molten resin solidifies.

【０００９】[0009]

【実施例】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用分岐管
継手の半断面図、図２は図１の底面図であって、図中１
は電気融着用分岐管継手、２は電熱線、３はシールパッ
キンである。Embodiments of the present invention will now be described in detail with reference to the drawings. 1 is a half sectional view of a branch pipe joint for electric fusion welding showing an embodiment of the present invention, and FIG. 2 is a bottom view of FIG.
Is a branch pipe joint for electric fusion, 2 is a heating wire, and 3 is a seal packing.

【００１０】電気融着用分岐管継手１は、ポリエチレ
ン，ポリプロピレン，ポリブテン等の合成樹脂からなる
ものであって、略半円弧状に湾曲したサドル１１の上面
から枝管１２が一体的に突出しており、該枝管１２と連
通してサドル１１に貫通孔１１０が設けられている。サ
ドル１１の裏面には、貫通孔１１０を中心としてニクロ
ム線等の電熱線２が所定間隔で渦巻状に埋設されてお
り、その内周端及び外周端から引き出された電熱線２の
両端部はサドル１１の上面に突出した端子ピンと接続し
ている。The branch pipe joint 1 for electric fusion is made of synthetic resin such as polyethylene, polypropylene and polybutene, and a branch pipe 12 integrally projects from the upper surface of a saddle 11 which is curved in a substantially semi-arcuate shape. A through hole 110 is provided in the saddle 11 so as to communicate with the branch pipe 12. On the back surface of the saddle 11, the heating wire 2 such as a nichrome wire is embedded in a spiral shape around the through hole 110 at a predetermined interval, and both ends of the heating wire 2 drawn from the inner peripheral end and the outer peripheral end are It is connected to a terminal pin protruding from the upper surface of the saddle 11.

【００１１】また、前記サドル１１の裏面には、貫通孔
１１０と接近した内周部に環状溝１３ａと、電熱線２の
埋設位置より外側の外周部に環状溝１３ｂが設けられて
おり、それぞれの環状溝１３ａ，１３ｂにシールパッキ
ン３が装着されている。シールパッキン３はサドル１１
の裏面より若干突出した状態で装着しておくことが肝要
であって、サドル１１の裏面を本管４の外周面に押し付
けたとき、シールパッキン３が押し潰されて本管４の外
周面に弾性的に圧接すると共に、電熱線２が埋設された
サドル１１の裏面が本管４の外周面と隙間なく密着する
ように設定しておく。On the back surface of the saddle 11, an annular groove 13a is provided in the inner peripheral portion close to the through hole 110, and an annular groove 13b is provided in the outer peripheral portion outside the position where the heating wire 2 is embedded. The seal packing 3 is attached to the annular grooves 13a and 13b. Seal packing 3 is saddle 11
It is important that the back of the saddle 11 is attached to the outer surface of the main pipe 4, and when the rear surface of the saddle 11 is pressed against the outer peripheral surface of the main pipe 4, the seal packing 3 is crushed to the outer peripheral surface of the main pipe 4. The saddle 11 in which the heating wire 2 is embedded is elastically pressed, and the back surface of the saddle 11 is set in close contact with the outer peripheral surface of the main pipe 4 without a gap.

【００１２】この電気融着用分岐管継手１をポリエチレ
ン，ポリプロピレン，ポリブテン等の合成樹脂からなる
本管４に融着接合する場合、従来継手と同様に、クラン
プ工具等を用いてサドル１１の裏面を本管４の外周面に
押し付けて固定し、サドル１１の裏面に埋設された電熱
線２に通電する。すると、サドル１１の裏面と本管４の
外周面とが同時に溶融して融着接合する。When the branch pipe joint 1 for electric fusion welding is fusion-bonded to the main pipe 4 made of synthetic resin such as polyethylene, polypropylene or polybutene, the back surface of the saddle 11 is fixed to the back face of the saddle 11 by using a clamp tool or the like as in the conventional joint. The main tube 4 is pressed and fixed to the outer peripheral surface thereof, and the heating wire 2 embedded in the back surface of the saddle 11 is energized. Then, the back surface of the saddle 11 and the outer peripheral surface of the main pipe 4 are simultaneously melted and fusion-bonded.

【００１３】このとき、サドル１１の裏面の内周部、及
び外周部に装着したシールパッキン３が本管４の外周面
と圧接するため、溶融樹脂がサドル１１の裏面と本管４
の外周面の間から逃げ出すことなく封じ込められる。こ
のため、サドル１１の裏面と本管４の外周面とが相互に
加圧された状態で強固に融着接合する。また、サドル１
１の裏面と本管４の外周面との接合面から溶融樹脂が逃
げないため、溶融樹脂が固化して収縮しても接合面の近
傍に真空ボイドが発生することがない。At this time, since the seal packing 3 attached to the inner peripheral portion and the outer peripheral portion of the rear surface of the saddle 11 is in pressure contact with the outer peripheral surface of the main pipe 4, the molten resin causes the molten resin to contact the rear surface of the saddle 11 and the main pipe 4.
It is contained without escaping from between the outer peripheral surfaces. Therefore, the back surface of the saddle 11 and the outer peripheral surface of the main pipe 4 are firmly fusion-bonded to each other in a state of being pressed against each other. Also saddle 1
Since the molten resin does not escape from the joint surface between the back surface of No. 1 and the outer peripheral surface of the main pipe 4, vacuum voids do not occur near the joint surface even if the molten resin solidifies and contracts.

【００１４】尚、前記実施例では、サドル１１の裏面の
内周部、及び外周部の両方に環状溝１３ａ，１３ｂを設
け、それぞれの環状溝１３ａ，１３ｂにシールパッキン
３を装着したものを例示したが、管継手のサイズ、施工
状況等によってはサドル裏面の内周部か外周部のいずれ
か一方にシールパッキンを装着しておくだけでも同様の
効果が期待できる。In the above embodiment, annular grooves 13a and 13b are provided on both the inner peripheral portion and the outer peripheral portion of the back surface of the saddle 11, and the seal packing 3 is attached to each of the annular grooves 13a and 13b. However, depending on the size of the pipe joint, the construction situation, etc., the same effect can be expected only by attaching the seal packing to either the inner peripheral portion or the outer peripheral portion of the back surface of the saddle.

【００１５】[0015]

【発明の効果】以上詳述した如く、本発明はサドル裏面
の内周部、又は外周部にシールパッキンを装着したの
で、サドル裏面を本管外周面に押し付けて電熱線を発熱
させたとき、溶融樹脂が接合面の間から逃げ出すことな
く封じ込められる。このため、サドル裏面と本管外周面
とが加圧されて強固に融着接合し、また溶融樹脂が固定
するとき接合面の近傍に真空ボイドが発生することもな
い。As described above in detail, according to the present invention, since the seal packing is attached to the inner peripheral portion or the outer peripheral portion of the back surface of the saddle, when the back surface of the saddle is pressed against the outer peripheral surface of the main pipe to generate heat, The molten resin is contained without escaping between the joint surfaces. For this reason, the back surface of the saddle and the outer peripheral surface of the main pipe are pressed to firmly fuse and bond, and when the molten resin is fixed, vacuum voids do not occur near the joint surface.

【００１６】従って、本発明の電気融着用分岐管継手を
用いると、サドル裏面と本管外周面との間に発生した融
着不良部を起点として亀裂が発生することによって、管
内流体が染み出したり、漏洩することがない。Therefore, when the branch pipe joint for electric fusion of the present invention is used, the fluid in the pipe oozes out due to the occurrence of cracks starting from the defective fusion portion formed between the rear surface of the saddle and the outer peripheral surface of the main pipe. And never leak.

【図面の簡単な説明】[Brief description of drawings]

【図１】図１は本発明の一実施例を示す電気融着用分岐
管継手の半断面図である。FIG. 1 is a half sectional view of a branch pipe joint for electric fusing showing an embodiment of the present invention.

【図２】図２は図１の底面図である。FIG. 2 is a bottom view of FIG.

【図３】図３は従来継手を示す半断面図である。FIG. 3 is a half sectional view showing a conventional joint.

【図４】図４は従来継手の要部拡大断面図である。FIG. 4 is an enlarged sectional view of a main part of a conventional joint.

【符号の説明】[Explanation of symbols]

１ 電気融着用分岐管継手 １１ サドル １２ 分岐管 ２ 電熱線 ３ シールパッキン ４ 本管 1 Branch pipe joint for electric fusion 11 Saddle 12 Branch pipe 2 Heating wire 3 Seal packing 4 Main pipe

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 略半円弧状に湾曲したサドル（１１）の
上面から枝管（１２）が一体的に突出し、またサドル
（１１）の裏面に電熱線（２）が渦巻状に所定間隔で埋
設された電気融着用分岐管継手であって、電熱線（２）
が埋設されたサドル（１１）裏面の内周部、又は外周部
に環状溝（１３ａ，１３ｂ）を設け、該環状溝（１３
ａ，１３ｂ）にシールパッキン（３）を装着したことを
特徴とする電気融着用分岐管継手。1. A branch pipe (12) integrally projects from the upper surface of a saddle (11) curved in a substantially semi-circular shape, and a heating wire (2) is spirally formed at predetermined intervals on the back surface of the saddle (11). A branch pipe joint for electric fusion that is embedded, comprising a heating wire (2)
The annular groove (13a, 13b) is provided in the inner peripheral portion or the outer peripheral portion of the back surface of the saddle (11) in which the annular groove (13) is embedded.
A branch pipe joint for electric fusion, characterized in that a seal packing (3) is attached to a, 13b).
JP7045718A 1995-03-06 1995-03-06 Branched joint for electrically fused connection Pending JPH08240294A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7045718A JPH08240294A (en) 1995-03-06 1995-03-06 Branched joint for electrically fused connection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7045718A JPH08240294A (en) 1995-03-06 1995-03-06 Branched joint for electrically fused connection

Publications (1)

Publication Number Publication Date
JPH08240294A true JPH08240294A (en) 1996-09-17

Family

ID=12727137

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7045718A Pending JPH08240294A (en) 1995-03-06 1995-03-06 Branched joint for electrically fused connection

Country Status (1)

Country Link
JP (1) JPH08240294A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020083085A (en) * 2001-04-26 2002-11-01 동도기공 주식회사 Branch pipe revival method of revival pipe and revival pipe for branch pipe
EP1231045A3 (en) * 2001-02-08 2002-11-20 Mitsui Chemicals, Inc. Electrofusion joint
JP2018105371A (en) * 2016-12-26 2018-07-05 株式会社クボタケミックス Branch saddle joint

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1231045A3 (en) * 2001-02-08 2002-11-20 Mitsui Chemicals, Inc. Electrofusion joint
US6840546B2 (en) 2001-02-08 2005-01-11 Mitsui Chemical, Inc. Electrofusion joint
KR20020083085A (en) * 2001-04-26 2002-11-01 동도기공 주식회사 Branch pipe revival method of revival pipe and revival pipe for branch pipe
JP2018105371A (en) * 2016-12-26 2018-07-05 株式会社クボタケミックス Branch saddle joint

Similar Documents

Publication Publication Date Title
JPH08121669A (en) Electric fusion type connecting device
JPH08240294A (en) Branched joint for electrically fused connection
JP2736804B2 (en) Manufacturing method of synthetic resin pipe joint
JPH06265082A (en) Electric fusion coupling
JPH04145294A (en) Transfer coupling between resin tube and metal tube
KR200184213Y1 (en) Device for connecting underground pipes
JPH11153274A (en) Tubular joint
JPS6140543B2 (en)
JP2002039488A (en) Pipe connecting structure and pipe fitting
JPH02130129A (en) Welded joint structure of plastic pipe
JPH01238794A (en) Connection structure for duplex tube and tube fitting
JP2677113B2 (en) Electrofusion fittings
JP2002295780A (en) Electrofusion joint and plastic pipe connecting method using the joint
KR200275923Y1 (en) synthetic resins pipe formed heat welding member
JPH02253094A (en) Electrofusion joint
JPH10185068A (en) Fixing method of electric fusion coupling
JPH076587U (en) Different pipe fittings
JP2719325B2 (en) Pipe closing structure, pipe closing method and plug
JP4422828B2 (en) Fusion bonding method for resin pipes
JP3003003B2 (en) Synthetic resin pipe fittings
JPH0791585A (en) Electric welded joint for corrugated pipe
JPH07332571A (en) Synthetic resin pipe with heating wire
JP3561600B2 (en) Electric fusion joint
KR200194973Y1 (en) Fusion coupler
JPH09324888A (en) Electrodeposition plug for repair

Legal Events

Date Code Title Description
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20040518

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20040525

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20041018