JPH0314115B2 - - Google Patents

Info

Publication number
JPH0314115B2
JPH0314115B2 JP61053951A JP5395186A JPH0314115B2 JP H0314115 B2 JPH0314115 B2 JP H0314115B2 JP 61053951 A JP61053951 A JP 61053951A JP 5395186 A JP5395186 A JP 5395186A JP H0314115 B2 JPH0314115 B2 JP H0314115B2
Authority
JP
Japan
Prior art keywords
branch pipe
heating wire
joining
hole
fluid transport
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
Application number
JP61053951A
Other languages
Japanese (ja)
Other versions
JPS61294291A (en
Inventor
Kyoshi Hamamoto
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.)
Yano Giken Co Ltd
Original Assignee
Yano Giken Co Ltd
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 Yano Giken Co Ltd filed Critical Yano Giken Co Ltd
Priority to JP61053951A priority Critical patent/JPS61294291A/en
Publication of JPS61294291A publication Critical patent/JPS61294291A/en
Publication of JPH0314115B2 publication Critical patent/JPH0314115B2/ja
Granted 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8145—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81457—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a block or layer of deformable material, e.g. sponge, foam, rubber
    • 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
    • B29C66/11—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
    • B29C66/114—Single butt 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
    • B29C66/50—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
    • B29C66/63—Internally supporting the article during joining
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8145—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81455—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps being a fluid inflatable bag or bladder, a diaphragm or a vacuum bag for applying isostatic pressure
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2101/00—Use of unspecified macromolecular compounds as moulding material
    • B29K2101/12—Thermoplastic materials

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Description

【発明の詳細な説明】 本発明は、水道水やガスなどの流体輸送管の途
中に分岐管を接合する技術のうち、殊に、接着剤
による接合が技術的に困難、或いは、実施不能な
ポリエチレン樹脂などの合成樹脂製流体輸送管に
分岐管を熱溶着手段にて一体的に接合する場合に
好適な、熱可塑性樹脂製流体輸送管への分岐管接
合方法に関する。Detailed Description of the Invention The present invention is particularly applicable to techniques for joining branch pipes in the middle of fluid transport pipes such as tap water or gas, where joining with adhesives is technically difficult or impracticable. The present invention relates to a method for joining a branch pipe to a fluid transport pipe made of a thermoplastic resin, which is suitable for integrally joining a branch pipe to a fluid transport pipe made of a synthetic resin such as polyethylene resin by thermal welding means.

従来の一般的な加熱溶着方法は、第７図で示す
ように、分岐管０２の接合端部側にフランジ部０
２Ａを一体成形しておき、このフランジ部０２Ａ
および流体輸送管０１の外面を夫々別々の器具で
加熱し、その両加熱器具を撤去したのち、両者を
圧接して溶着していたので、加熱、圧接のタイミ
ングをとるのが難しく、高度な技術が要求され、
しかも、常に均一な溶着力を得るのがむずかしく
て、接合強度を確実、安定化できない難点があつ
た。 In the conventional general heat welding method, as shown in FIG.
2A is integrally molded, and this flange part 02A
The outer surface of the fluid transport pipe 01 was heated with separate devices, and after removing both heating devices, they were welded together by pressure, which made it difficult to time the heating and pressure welding and required advanced technology. is required,
Moreover, it is difficult to always obtain a uniform welding force, and the bonding strength cannot be ensured and stabilized.

そこで本発明者は、先に出願した特願昭55−
66320号において、上記従来技術の有する欠点を
解消すべく、且つ可塑性樹脂製流体分岐管の接合
端部外面に加熱用電熱線をコイル状に捲回し、流
体輸送管に形成した孔内に前期接合端部を挿通し
た状態での通電により両者を同時に加熱軟化さ
せ、その後に接合端部を拡径させて一体接合する
技術を提案した。 Therefore, the inventor of the present invention applied for the patent application filed earlier in 1983-
No. 66320, in order to eliminate the drawbacks of the above-mentioned prior art, a heating wire is wound in a coil shape on the outer surface of the joint end of a fluid branch pipe made of plastic resin, and a heating wire is wound in a coil shape in the hole formed in the fluid transport pipe. We proposed a technology that simultaneously heats and softens both by applying electricity while the end is inserted, and then expands the diameter of the joint end to join them together.

これによれば、分岐管の接合端部を流体輸送管
に形成した孔に差込んで両者を予め、最終の接合
姿勢に仮保持させた状態での通電により両者接合
面を同時に加熱することができるから、同じ溶着
接合手段であつても、分岐管の接合端部外面と孔
内面又は管外周面とを別々の器具で加熱し、その
加熱器具を撤去したのち、両加熱面を圧接して溶
着する場合に比べて作業工程が少ない上に、加
熱、圧接に高度なタイミングを必要とせず、確実
かつ均一な溶着力を得易くて、所期の接合を能率
的、安定的に行える利点を有する。反面この種、
溶着接合手段によると、前記加熱用電熱線が接合
部分に埋め殺しされるものであるから、接合を確
実、かつ、高強度のものにして仕上りの良い接合
効果を得るためには、拡径作業が完全に終了する
まで、流体輸送管の孔に対する分岐管の接合端部
の位置、ならびに、その接合端部に対する加熱用
電熱線の相対位置を、これらが相互に位置ずれな
どしないように、かつ、溶着接合後においてその
接合部肉厚内に埋入位置して強固な接合力を有す
るように、確実な位置固定状態に維持しての作業
が要求される。 According to this, it is possible to simultaneously heat the joint surfaces of both by inserting the joint end of the branch pipe into a hole formed in the fluid transport pipe and temporarily holding both in the final joint position by applying electricity. Therefore, even if the same welding method is used, the outer surface of the joint end of the branch pipe and the inner surface of the hole or the outer peripheral surface of the pipe are heated with separate devices, and after the heating device is removed, both heating surfaces are pressed together. It has the advantage of requiring fewer work steps than welding, does not require sophisticated timing for heating and pressure welding, makes it easy to obtain reliable and uniform welding force, and allows the desired welding to be performed efficiently and stably. have On the other hand, this kind
According to the welding joining method, the heating wire is buried in the joining part, so in order to make the joining reliable and strong, and to obtain a good joining effect, it is necessary to perform diameter expansion work. Until the process is completely completed, the position of the joint end of the branch pipe with respect to the hole of the fluid transport pipe and the relative position of the heating wire with respect to the joint end must be adjusted so that they do not shift relative to each other, and After welding and joining, work is required to maintain the position in a securely fixed state so that it is embedded within the thickness of the joint and has a strong joining force.

本発明は、上記した諸効果を有する溶着接合手
段を実施する場合において要求される電熱線の位
置固定を確実、容易に行えて、仕上り精度の良い
分岐管接合方法を得ることにその目的がある。 An object of the present invention is to provide a method for joining branch pipes that can reliably and easily fix the position of a heating wire, which is required when implementing a welding joining means having the above-mentioned effects, and that provides a high finishing accuracy. .

上記目的を達成するための本発明の特徴とする
構成は、熱可塑性樹脂製流体輸送管に形成した孔
内に挿通される熱可塑性樹脂製分岐管の接合端部
外面に、コイル状の加熱用電熱線を装着し、か
つ、前記孔内への挿通状態での通電により、前記
接合端部外面および前記孔内面を同時に加熱軟化
させてそれらの両者を一体に溶着接合させる流体
輸送管への分岐管接合方法において、前記分岐管
の接合端部外面に、外力が作用していない自由状
態ではコイル状に形成され、かつ、前記自由状態
でのコイル内径が前記分岐管の外径よりもやや小
であるように寸法設定されている加熱用電熱線
を、その弾性力に抗して拡開状態で前記分岐管に
外嵌装着し、その後、加熱用電熱線に通電する点
にあり、かかる構成から次の作用ならびに効果を
奏する。 The characteristic configuration of the present invention for achieving the above object is that a coil-shaped heating coil is attached to the outer surface of the joint end of a thermoplastic resin branch pipe that is inserted into a hole formed in a thermoplastic resin fluid transport pipe. Branching into a fluid transport pipe in which a heating wire is attached and electricity is supplied while the wire is inserted into the hole to simultaneously heat and soften the outer surface of the joint end and the inner surface of the hole and weld and join them together. In the pipe joining method, the outer surface of the joint end of the branch pipe is formed into a coil shape in a free state where no external force is applied, and the inner diameter of the coil in the free state is slightly smaller than the outer diameter of the branch pipe. A heating heating wire whose dimensions are set as shown in FIG. It produces the following actions and effects.

即ち、自由状態において分岐管の接合端部外径
よりも、コイル内径をやや小径に寸法設定された
コイル状の加熱用電熱線を、それの弾性力に抗し
て拡開しながら分岐管の接合端部に外嵌装着する
ことによつて、その弾性縮径力をもつて、この加
熱用電熱線を所要位置に確実に固定保持できるば
かりでなく、前記流体管の孔に挿通させる前に、
予め、通電してその捲回外面部分を加熱軟化させ
ることによつて前記弾性縮径力を利用して、この
加熱用電熱線を分岐管外面に食い込ませて、加熱
用電熱線の外嵌に拘わらず分岐管接合端部の実質
的な外径を、加熱用電熱線が外嵌されていないも
のの外径と等しい又はほぼ等しいものにすること
ができる。そのため、前記孔内径を加熱用電熱線
相当分だけ余分に大きくする必要がなく、分岐管
の接合端部を挿通するに足るだけの可及的に小径
のものにして、それの挿通時にコイル状電熱線が
位置ずれすることによる仕上り精度の大幅な低下
を招く不都合を回避することができる。 That is, in a free state, a coil-shaped heating wire whose coil inner diameter is set to be slightly smaller than the outer diameter of the joint end of the branch pipe is expanded against the elastic force of the coil to open the branch pipe. By externally fitting the joint end, the heating wire can not only be securely fixed and held in the desired position by its elastic diameter-reducing force, but also can be ,
By applying electricity in advance to heat and soften the outer surface of the winding, the elastic diameter-reducing force is used to make the heating wire bite into the outer surface of the branch pipe, so that the heating wire is fitted onto the outer surface of the branch pipe. Regardless, the substantial outer diameter of the joint end of the branch pipe can be made equal to or approximately equal to the outer diameter of the branch pipe without the heating wire fitted onto the outside. Therefore, there is no need to make the inner diameter of the hole extra large by the amount equivalent to the heating wire, and the diameter of the hole is made as small as possible, just enough to insert the joint end of the branch pipe, and when it is inserted, it is coiled. It is possible to avoid the inconvenience of a significant drop in finishing accuracy due to positional displacement of the heating wire.

従つて、挿通状態での通電に伴い必要個所を確
実、迅速に加熱軟化させて強力な溶着接合が行え
るとともに、電熱線を分岐管の接合端部の外面と
孔内面との接合面部分から外れた接合部肉厚内に
移行させた状態で埋入位置させて、前記分岐管外
面と孔内面との接合面部分における互いの接合面
積を、電熱線の存在によつて減ずることがないの
で、仕上りの良い接合状態が得られるに至つた。 Therefore, when electricity is applied while the wire is inserted, the necessary parts are reliably and quickly heated and softened to make a strong welding joint, and the heating wire can be removed from the joint surface between the outer surface of the joint end of the branch pipe and the inner surface of the hole. By embedding the heating wire within the joint wall thickness, the joint area of the joint surface between the outer surface of the branch pipe and the inner surface of the hole is not reduced due to the presence of the heating wire. A bonded state with a good finish was obtained.

以下に、本発明の実施例を図面の記載に基いて
説明する。 Embodiments of the present invention will be described below with reference to the drawings.

先ず、本発明の接合方法に用いる加熱用電熱線
について説明する。 First, the heating wire used in the joining method of the present invention will be explained.

加熱用電熱線３は、加熱用抵抗線など通電によ
り加熱昇温される素材で構成され、かつ、第３図
に展開して示すように、ヘアーピン状に二つ折り
状態に折曲げ形成されている線材を、第４図の如
くコイル状に形成したものである。そして、この
加熱用電熱線３は、そのコイル内径が、自由状態
において前記分岐管２の外径よりもやや小である
ように寸法設定されている。 The heating wire 3 is made of a material such as a heating resistance wire that can be heated and heated by electricity, and is bent in half into a hairpin shape, as shown unfolded in FIG. 3. The wire rod is formed into a coil shape as shown in FIG. The heating wire 3 is dimensioned so that the inner diameter of the coil is slightly smaller than the outer diameter of the branch pipe 2 in the free state.

次に、前記加熱用電熱線３を用いての接着接合
要領を説明する。 Next, a method of adhesive bonding using the heating wire 3 will be explained.

第１図で示すようなポリエチレン樹脂製の流体
輸送管１の分岐必要個所に、分岐管２の外径と等
しい又はそれよりもやや大径の孔１Ａを貫通形成
するとともに、前記分岐管２の接合端部２Ａ外面
に、予め、前記加熱用電熱線３を、その弾性力に
抗して少し拡開させながら、裸のままでかつその
両端ターミナル部３Ａ，３Ａを上方に突出位置さ
せる状態で外嵌装着する。 As shown in FIG. 1, a hole 1A having a diameter equal to or slightly larger than the outer diameter of the branch pipe 2 is formed through the branch pipe 1 at a point where it is necessary to branch. The heating wire 3 is placed on the outer surface of the joint end portion 2A in advance, with the heating wire 3 slightly expanded against its elastic force, with both end terminal portions 3A, 3A protruding upward. Attach externally.

そして、この加熱用電熱線３を装着した接合端
部２Ａを、第１図の如く前記孔１Ａ内に挿通させ
た状態でターミナル部３Ａ，３Ａを通じて加熱用
電熱線３に通電することにより、前記接合端部２
Ａ外面および孔１Ａ内面を同時に加熱（約180℃）
して軟化させる。 Then, by inserting the joint end 2A to which the heating wire 3 is attached into the hole 1A as shown in FIG. 1, the heating wire 3 is energized through the terminal portions 3A, 3A. Joint end 2
Simultaneously heats the outer surface of A and the inner surface of hole 1A (approximately 180℃)
to soften.

このようにして、前記接合端部２Ａの外面の加
熱軟化に伴つて、加熱用電熱線３自信の縮径方向
への弾性復元力により、この電熱線３を第６図で
示すように分岐管２の肉厚内に喰い込ませた状態
に位置固定しておく。 In this way, as the outer surface of the joint end 2A is heated and softened, the heating wire 3 is moved into a branch pipe as shown in FIG. Fix the position in the state where it is bitten into the wall thickness of 2.

しかるのち、第２図の如く、前記分岐管２内を
通して流体輸送管１内に挿通位置させる、或い
は、予め挿通位置させてある、弾性部材６を操作
具７を介して圧縮拡大させて、軟化した分岐管２
の接合端部２Ａを拡径することによつて、その拡
径部分を孔１Ａ内面に圧接させて一体に、溶着接
合させるのである。 Thereafter, as shown in FIG. 2, the elastic member 6 is inserted into the fluid transport pipe 1 through the branch pipe 2, or the elastic member 6, which has been inserted in advance, is compressed and expanded via the operating tool 7 to soften it. branch pipe 2
By enlarging the diameter of the joining end 2A, the enlarged diameter portion is brought into pressure contact with the inner surface of the hole 1A and integrally welded and joined.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図、第２図は分岐管の熱溶着要領を示す要
部の縦断面図、第３図は加熱用電熱線を展開して
素材の状態で示す拡大側面図、第４図は加熱用電
熱線の装着状態を示す側面図、第５図は加熱用電
熱線の装着状態での分岐管の拡大断面図、第６図
は第５図の要部拡大図である。第７図は従来方法
を示す説明図である。 １……流体輸送管、１Ａ……孔、２……分岐
管、２Ａ……接合端部、３……加熱用電熱線。 Figures 1 and 2 are longitudinal cross-sectional views of the main parts showing the steps for heat welding the branch pipes, Figure 3 is an enlarged side view showing the heating wire in its raw material state, and Figure 4 is the heating wire. FIG. 5 is an enlarged sectional view of the branch pipe with the heating wire attached, and FIG. 6 is an enlarged view of the main part of FIG. 5. FIG. 7 is an explanatory diagram showing a conventional method. 1...Fluid transport pipe, 1A...hole, 2...branch pipe, 2A...junction end, 3...heating wire.

Claims (1)

【特許請求の範囲】[Claims] １ 熱可塑性樹脂製流体輸送管１に形成した孔１
Ａ内に挿通される熱可塑性樹脂製分岐管２の接合
端部２Ａ外面に、コイル状の加熱用電熱線３を装
着し、かつ、前記孔１Ａ内への挿通状態での通電
により、前記接合端部２Ａ外面および前記孔１Ａ
内面を同時に加熱軟化させてそれらの両者を一体
に溶着接合させる流体輸送管への分岐管接合方法
であつて、前記分岐管２の接合端部２Ａ外面に、
外力が作用していない自由状態ではコイル状に形
成され、かつ、前記自由状態でのコイル内径が前
記分岐管２の外径よりもやや小であるように寸法
設定されている加熱用電熱線３を、その弾性力に
抗して拡開状態で前記分岐管２に外嵌装着し、そ
の後、加熱用電熱線３に通電する事を特徴とする
流体輸送管への分岐管接合方法。1 Hole 1 formed in thermoplastic resin fluid transport pipe 1
A coiled heating heating wire 3 is attached to the outer surface of the joining end 2A of the thermoplastic resin branch pipe 2 inserted into the hole 1A, and the joining is performed by applying electricity while the wire is inserted into the hole 1A. The outer surface of the end portion 2A and the hole 1A
A method for joining a branch pipe to a fluid transport pipe in which the inner surfaces are simultaneously heated and softened to weld and join them together, and the method includes:
A heating wire 3 that is formed in a coil shape in a free state where no external force is applied, and whose dimensions are set so that the inner diameter of the coil in the free state is slightly smaller than the outer diameter of the branch pipe 2. A method for joining a branch pipe to a fluid transport pipe, characterized in that the branch pipe is fitted onto the branch pipe 2 in an expanded state against its elastic force, and then the heating wire 3 is energized.
JP61053951A 1986-03-12 1986-03-12 Method of joining branch pipe to fluid transport pipe Granted JPS61294291A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61053951A JPS61294291A (en) 1986-03-12 1986-03-12 Method of joining branch pipe to fluid transport pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61053951A JPS61294291A (en) 1986-03-12 1986-03-12 Method of joining branch pipe to fluid transport pipe

Publications (2)

Publication Number Publication Date
JPS61294291A JPS61294291A (en) 1986-12-25
JPH0314115B2 true JPH0314115B2 (en) 1991-02-26

Family

ID=12957027

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61053951A Granted JPS61294291A (en) 1986-03-12 1986-03-12 Method of joining branch pipe to fluid transport pipe

Country Status (1)

Country Link
JP (1) JPS61294291A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2592914B2 (en) * 1988-06-29 1997-03-19 株式会社クボタ Fusion bonding structure and fusion bonding method for thermoplastic synthetic resin tubes
JPH02190694A (en) * 1989-01-19 1990-07-26 Tokushu Kogyo Kk Connecting method for tube made of polymer material
GB2232330B (en) * 1989-05-01 1993-05-26 Central Plastics Co A method of connecting pipes
JPH0751997B2 (en) * 1989-07-04 1995-06-05 特殊工業株式会社 Joint sleeve
JPH0724719Y2 (en) * 1989-07-21 1995-06-05 三菱樹脂株式会社 Electrofusion type synthetic resin branch pipe joint
FI112338B (en) * 2000-10-06 2003-11-28 Uponor Innovation Ab Method of making a well and a well
DE202005020977U1 (en) * 2004-04-29 2006-12-28 Friatec Ag Device for connecting components made of fusible plastic

Also Published As

Publication number Publication date
JPS61294291A (en) 1986-12-25

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