JP2007247869A - Heat fusion joining method of resin tube - Google Patents

Heat fusion joining method of resin tube Download PDF

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JP2007247869A
JP2007247869A JP2006075707A JP2006075707A JP2007247869A JP 2007247869 A JP2007247869 A JP 2007247869A JP 2006075707 A JP2006075707 A JP 2006075707A JP 2006075707 A JP2006075707 A JP 2006075707A JP 2007247869 A JP2007247869 A JP 2007247869A
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hole
diameter
branch pipe
pipe
main pipe
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Kuniomi Kuroda
田 邦 臣 黒
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SOLAR GIKEN KK
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SOLAR GIKEN KK
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    • 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
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
    • B29C65/2007—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror" characterised by the type of welding mirror
    • B29C65/203—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror" characterised by the type of welding mirror being several single mirrors, e.g. not mounted on the same tool
    • 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
    • B29C66/01—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
    • B29C66/1226—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 one bevelled 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
    • B29C66/5224—Joining tubular articles for forming fork-shaped connections, e.g. for making Y-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
    • B29C66/5224—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
    • B29C66/70—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
    • 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
    • B29C66/73—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7377—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined amorphous, semi-crystalline or crystalline
    • B29C66/73773—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined amorphous, semi-crystalline or crystalline the to-be-joined area of at least one of the parts to be joined being semi-crystalline
    • B29C66/73774—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined amorphous, semi-crystalline or crystalline the to-be-joined area of at least one of the parts to be joined being semi-crystalline the to-be-joined areas of both parts to be joined being semi-crystalline
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/60—Multitubular or multicompartmented articles, e.g. honeycomb
    • B29L2031/601—Multi-tubular articles, i.e. composed of a plurality of tubes
    • B29L2031/602—Multi-tubular articles, i.e. composed of a plurality of tubes composed of several elementary tubular elements

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

<P>PROBLEM TO BE SOLVED: To provide a heat fusion joining method of a resin tube capable of connecting many small diameter branch pipes to a large diameter main pipe at a right angle. <P>SOLUTION: In the case of fusing and joining the small diameter branch pipes made of polybutene, polyethylene or polypropylene to the large diameter main pipe of the same material of which diameter is larger than the branch pipes at a right angle or obliquely by using the fusion joining method of the resin tube by this invention, an attaching hole is provided in the main pipe and an inlet peripheral of the attaching hole and an outer circumference of an insertion part of the branch pipe are heated and joined. The attaching hole consists of a first hole bored through to the inside of the main pipe and having a hole diameter fitted to an inner diameter of the branch pipes and a second hole having a hole diameter fitted to an outer diameter of the branch pipes. It is preferable to form a step part for locking the branch pipe between the first hole and the second hole. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、給水器、給湯器、暖房器、熱交換器などの配管材として使用される樹脂管に係り、より詳しくは、大口径の主管に直角または斜めに接合される小口径の分岐管の熱融着接合方法に関する。   The present invention relates to a resin pipe used as a piping material for water heaters, water heaters, heaters, heat exchangers, and the like, and more specifically, a small-diameter branch pipe joined perpendicularly or diagonally to a large-diameter main pipe. The present invention relates to a heat fusion bonding method.

一般に、樹脂管の融着接続には、特許文献１に示されるように、エレクトロフュージョン（ＥＦ）法、ヒートフュージョン（ＨＦ）法及びアウターフュージョン（ＯＦ）法などがある。ＥＦ法は、継手となるソケットの内部、融着部近辺にニクロム線があらかじめ挿入された部品を射出成形によって作り、ソケットと挿入管を嵌合して接続した後、このニクロム線に通電して加熱融着する工法である。ＨＦ法は、ソケットの内側と一方の挿入管の端部を、それぞれ電気ヒーターが内蔵された加熱工具で溶かした上で嵌合し接合する。次に、ソケットの内側と、他方の挿入管の端部を同じ作業で熱融着する工法である。すなわち、ＨＦ法は、２工程で一つのソケットに２本のパイプを接続するものである。ＯＦ法は、挿入管の外径に合致した内径を有する４ｃｍ長のストレートなソケットに、両側から２つの挿入管を挿入した後、ソケットを外部より加熱し融着する工法である。   Generally, the fusion splicing of resin pipes includes an electrofusion (EF) method, a heat fusion (HF) method, and an outer fusion (OF) method, as disclosed in Patent Document 1. In the EF method, a part in which a nichrome wire is inserted in advance in the socket serving as a joint and in the vicinity of the fusion part is made by injection molding, the socket and the insertion tube are fitted and connected, and then the nichrome wire is energized. This is a method of heat fusion. In the HF method, the inside of a socket and the end of one insertion tube are respectively melted with a heating tool having a built-in electric heater and then fitted and joined. Next, it is a construction method in which the inner side of the socket and the end of the other insertion tube are heat-sealed by the same operation. That is, in the HF method, two pipes are connected to one socket in two steps. The OF method is a method in which two insertion tubes are inserted from both sides into a 4 cm long straight socket having an inner diameter that matches the outer diameter of the insertion tube, and then the socket is heated and fused from the outside.

一本の大口径の主管に多数本の小口径の分岐管を直角または斜めに、あるいはＴ字状に融着する場合、使用するパイプどうしを従来の方法では接続できない。従来の方法で行なうとすると、Ｔ字型または十字型をした短い部品（ヘッダー分岐管構造体と呼ぶ）を射出成形で作り、その部品を連接して融着することになる。このようなヘッダー分岐管構造体を作るには、二重三重の手間がかかる。さらに、ヘッダー分岐管構造体を作っても、配管接続法であるＥＦ法、ＨＦ法及びＯＦ法が適用できるわけではなく、一般には困難である。
特開２００１−１７１００７号公報 When a large number of small-diameter branch pipes are fused at right angles, obliquely, or in a T shape to a single large-diameter main pipe, the pipes to be used cannot be connected by the conventional method. If the conventional method is used, a T-shaped or cross-shaped short part (referred to as a header branch pipe structure) is formed by injection molding, and the parts are connected and fused. To make such a header branch pipe structure, it takes a double and triple effort. Furthermore, even if the header branch pipe structure is made, the EF method, the HF method, and the OF method, which are pipe connection methods, are not applicable and are generally difficult.
JP 2001-171007 A

本発明の目的は、上記の問題を解決するためになされたもので、大口径の主管に多数の小口径の分岐管を直角または斜めに接続することができる樹脂管の熱融着接合方法を提供することにある。   An object of the present invention is to solve the above-described problem, and is a resin pipe heat fusion bonding method capable of connecting a large number of small diameter branch pipes to a large diameter main pipe at right angles or obliquely. It is to provide.

上記の目的を達成するため、本発明による樹脂管の熱融着接合方法は、ポリブテン、ポリエチレンまたはポリプロピレン製の小口径の分岐管を、該分岐管より径が大きく、同じ材質の大口径の主管に直角または斜めに融着接合する場合、該主管に取付穴をあけ、該取付穴の入口周辺及び該分岐管の挿入部分の外周を加熱して接合することを特徴とする。   In order to achieve the above object, the resin pipe heat-sealing method according to the present invention comprises a small-diameter branch pipe made of polybutene, polyethylene or polypropylene having a larger diameter than the branch pipe, and a large-diameter main pipe made of the same material. In the case of fusion bonding at a right angle or oblique to the main pipe, a mounting hole is formed in the main pipe, and the periphery of the inlet of the mounting hole and the outer periphery of the insertion portion of the branch pipe are heated and bonded.

前記取付穴は、前記主管の内部に貫通し前記分岐管の内径に合わせた穴径を有する第１の穴と、前記分岐管の外径に合わせた穴径を有する第２の穴とで構成され、前記第１の穴と前記第２の穴の間に前記分岐管を係止させる段部が形成されていることが好ましい。   The mounting hole includes a first hole that penetrates into the main pipe and has a hole diameter that matches the inner diameter of the branch pipe, and a second hole that has a hole diameter that matches the outer diameter of the branch pipe. It is preferable that a step portion for locking the branch pipe is formed between the first hole and the second hole.

本発明による請求項１の樹脂管の熱融着接合方法によれば、分岐方向が異なる場合、分岐の数だけ必要とした従来の十字型またはＴ字型のソケットを不要にできる。大口径の主管に取付穴をあけ、取付穴に小口径の分岐管を挿入し、その周囲を加熱して接合するだけであり、分岐したい箇所に簡単に接合できる。ソケットがなく作業効率が良いから、必要コストの削減も図れる。   According to the method for heat-sealing and joining resin pipes according to the first aspect of the present invention, when the branching directions are different, the conventional cross-shaped or T-shaped socket required for the number of branches can be eliminated. Simply drill a mounting hole in the main pipe with a large diameter, insert a branch pipe with a small diameter into the mounting hole, and heat the periphery to join it. Since there is no socket and work efficiency is good, the required cost can be reduced.

本発明の請求項２によれば、取付穴には、分岐管を係止させる段部が形成されているので、挿入時、分岐管の先端面が段部に当接する。そのため、挿入が確実で、分岐管が主管の内部に突き出すことがない。また、加熱融着した時、挿入した分岐管の先端面と外側の一部の両方を主管の樹脂に融着させることができる。   According to the second aspect of the present invention, since the mounting hole is formed with the step portion for locking the branch pipe, the distal end surface of the branch pipe contacts the step portion during insertion. Therefore, the insertion is reliable and the branch pipe does not protrude into the main pipe. Further, when heat-sealing, both the front end surface of the inserted branch pipe and a part of the outside can be fused to the resin of the main pipe.

以下、図面を参照して、本発明による樹脂管の熱融着接合方法を説明する。   Hereinafter, with reference to the drawings, a method for heat fusion bonding of resin pipes according to the present invention will be described.

図１は、本発明による熱融着接合作業後の、主管と分岐管の接合部の断面図である。大口径の主管１に小口径の分岐管２が直角に接合されていることを示す。主管１は外径が大口径の管であり、分岐管２は主管１より外径の小さな小口径の管である。ここで、主管１と分岐管２は、ポリブテン、ポリエチレンまたはポリプロピレン製の樹脂管である。例えば、ポリブテンの樹脂管は、無毒で、耐凍結及び耐熱性に優れ、耐蝕性があり水道管などに広く使用されている。また熱可塑性で加工がしやすい。   FIG. 1 is a cross-sectional view of a joint portion between a main pipe and a branch pipe after a heat fusion joining work according to the present invention. It shows that a small-diameter branch pipe 2 is joined to a large-diameter main pipe 1 at a right angle. The main pipe 1 is a pipe having a large outer diameter, and the branch pipe 2 is a small diameter pipe having a smaller outer diameter than the main pipe 1. Here, the main pipe 1 and the branch pipe 2 are resin pipes made of polybutene, polyethylene, or polypropylene. For example, polybutene resin pipes are non-toxic, have excellent freezing and heat resistance, corrosion resistance, and are widely used for water pipes and the like. It is also thermoplastic and easy to process.

図２は、本発明による熱融着接合作業前の、主管と分岐管の接合部の拡大された断面図である。主管１には、分岐管２が挿入される取付穴５が設けられる。取付穴５は、分岐管２の内径に合わせた穴径を有する第１の穴６と、分岐管２の外径に合わせた穴径を有する第２の穴７からなる。また、第１の穴６と第２の穴７の間には段部４が設けられる。そして、分岐管２を第２の穴７に挿入し、分岐管２の先端面が段部４に当接するまで押し込む。円で囲った熱融着部３に示すように、分岐管２の先端面（軸方向正面）と側面の両方が主管１の樹脂に融着できる。ｔ１は主管１の肉厚で、ｔ２は第１の穴６の深さを示す。一例として、主管１の外径が２７ｍｍ、肉厚ｔ１が５ｍｍの場合、分岐管２は、外径が１３ｍｍで肉厚が１．６ｍｍの管を使用することができる。その場合、第１の穴６の深さｔ２は、約４ｍｍとすることができる。   FIG. 2 is an enlarged cross-sectional view of the joint portion between the main pipe and the branch pipe before the heat fusion joining work according to the present invention. The main pipe 1 is provided with a mounting hole 5 into which the branch pipe 2 is inserted. The mounting hole 5 includes a first hole 6 having a hole diameter matched to the inner diameter of the branch pipe 2 and a second hole 7 having a hole diameter matched to the outer diameter of the branch pipe 2. A step 4 is provided between the first hole 6 and the second hole 7. Then, the branch pipe 2 is inserted into the second hole 7 and pushed in until the front end surface of the branch pipe 2 comes into contact with the step portion 4. As shown in the heat-sealed portion 3 surrounded by a circle, both the front end surface (front surface in the axial direction) and the side surface of the branch pipe 2 can be fused to the resin of the main pipe 1. t1 is the thickness of the main pipe 1, and t2 indicates the depth of the first hole 6. As an example, when the outer diameter of the main pipe 1 is 27 mm and the wall thickness t1 is 5 mm, the branch pipe 2 can be a pipe having an outer diameter of 13 mm and a wall thickness of 1.6 mm. In that case, the depth t2 of the first hole 6 may be about 4 mm.

図３は、熱融着接合作業後の主管と分岐管の接合部の断面図である。（ａ）は、分岐管２の押込圧が適切な場合で、分岐管２の付け根部分が適度に膨らんでいる。（ｂ）は、分岐管２の押込圧が弱い場合で溝が残っているから、分岐管２の側面と主管１の接合が十分でないことを示す。（ｃ）は、分岐管２の押込圧が強い場合で、分岐管２の内径が狭まるほど変形させたことを示している。（ａ）となるように、熱融着時の押込圧を調整することが望ましい。   FIG. 3 is a cross-sectional view of the joint portion between the main pipe and the branch pipe after the heat fusion joining work. (A) is a case where the indentation pressure of the branch pipe 2 is appropriate, and the root portion of the branch pipe 2 is appropriately expanded. (B) shows that the side surface of the branch pipe 2 and the main pipe 1 are not sufficiently joined because the groove remains when the pushing pressure of the branch pipe 2 is weak. (C) shows that the branch pipe 2 is deformed as the inner diameter of the branch pipe 2 becomes narrower when the pushing pressure of the branch pipe 2 is strong. It is desirable to adjust the indentation pressure at the time of heat-sealing so as to be (a).

図４は、主管にキリで穴をあける作業の模式図である。第１の穴６は、電動の穴あけキリ１０で、主管１の内径に貫通するようにあけられる。第１の穴６の外径ｔ１０は、分岐管２の内径に合わせている。従って、穴あけキリ１０の外径も分岐管２の内径に合わせている。第１の穴６をあけるとき、穴あけキリの付け根部分には、座ぐり用のカッター１１がある。第２の穴７は座ぐり用カッター１１で同時にあけることができる。第２の穴７の外径ｔ２０は、分岐管２の外径に合わせている。   FIG. 4 is a schematic diagram of an operation for drilling a hole in the main pipe. The first hole 6 is an electric drilling hole 10 that is formed so as to penetrate the inner diameter of the main pipe 1. The outer diameter t <b> 10 of the first hole 6 is matched with the inner diameter of the branch pipe 2. Therefore, the outer diameter of the drilling hole 10 is also matched with the inner diameter of the branch pipe 2. When drilling the first hole 6, there is a counterbore cutter 11 at the base of the drilling hole. The second hole 7 can be simultaneously drilled with a counterbore cutter 11. The outer diameter t <b> 20 of the second hole 7 is matched with the outer diameter of the branch pipe 2.

図５は、図４で示すようにして形成された取付穴を有する主管と分岐管の、挿入熱融着接合作業前の斜視図である。取付穴５と分岐管２の先端はそれぞれ熱で軟化され、軟化したら直ちに矢印で示す方向に挿入される。   FIG. 5 is a perspective view of the main pipe and the branch pipe having mounting holes formed as shown in FIG. 4 before the insertion heat fusion bonding operation. The attachment holes 5 and the tips of the branch pipes 2 are each softened by heat, and immediately after being softened, they are inserted in the directions indicated by the arrows.

図６は、熱融着接合作業後の主管と分岐管の斜視図である。   FIG. 6 is a perspective view of the main pipe and the branch pipe after the heat fusion bonding operation.

図７は、主管用の加熱工具の斜視図である。主管１は、例えば、外径２７ｍｍ（内径１７ｍｍ、肉厚５ｍｍ）とする。２０ｍｍピッチで３本分岐管２を接続する場合を示す。主管１には、先ず外側の所定の位置に、図４のやり方で３つの取付穴５を２０ｍｍ間隔であけておく。主管用の加熱工具２０は、取付穴５に挿入できる３個の凸部８がある。凸部８の外径は第１の穴６と第２の穴７に合わせた形状を有する。凸部８を含む灰色のヒーター部材は、ポリテトラフルオロエチレンを被覆して樹脂が付着しないようにしている。このヒーター部材は着脱可能であり、取付穴５の穴径に応じて交換できる。そして、２３０度に加熱し保持している。凸部８が取付穴５に挿入されている時間は３０秒である。   FIG. 7 is a perspective view of a heating tool for the main pipe. The main pipe 1 has an outer diameter of 27 mm (inner diameter: 17 mm, wall thickness: 5 mm), for example. A case where three branch pipes 2 are connected at a pitch of 20 mm is shown. In the main pipe 1, first, three mounting holes 5 are formed at predetermined intervals on the outer side at intervals of 20 mm in the manner shown in FIG. The heating tool 20 for the main pipe has three convex portions 8 that can be inserted into the mounting holes 5. The outer diameter of the convex portion 8 has a shape matched to the first hole 6 and the second hole 7. The gray heater member including the convex portion 8 is coated with polytetrafluoroethylene so that the resin does not adhere. This heater member is detachable and can be replaced according to the diameter of the mounting hole 5. And it heats and holds at 230 degrees. The time during which the convex portion 8 is inserted into the mounting hole 5 is 30 seconds.

図８は、分岐管用の加熱工具の斜視図である。分岐管２は、外径１３ｍｍ（内径９．８ｍｍ）とする。分岐管２は、主管１と同じ材質で、ここではポリプロピレン系のポリプロピレンランダムコポリマー（ＰＰＲ）製パイプとする。分岐管用の加熱工具３０は、分岐管２の先端が挿入される３個の凹部９がある。凹部９を含む灰色のヒーター部材は、ポリテトラフルオロエチレンを被覆して樹脂が付着しないようにしている。このヒーター部材は着脱可能であり、分岐管２の径に応じて交換できる。そして、２３０度に加熱し保持している。３本の分岐管２の加熱は、主管１の加熱開始より１０秒遅く開始する。分岐管２の先端が凹部９に挿入されている時間は２０秒である。   FIG. 8 is a perspective view of a heating tool for a branch pipe. The branch pipe 2 has an outer diameter of 13 mm (an inner diameter of 9.8 mm). The branch pipe 2 is made of the same material as that of the main pipe 1, and here is a polypropylene-based polypropylene random copolymer (PPR) pipe. The heating tool 30 for the branch pipe has three recesses 9 into which the tips of the branch pipe 2 are inserted. The gray heater member including the recess 9 is coated with polytetrafluoroethylene so that the resin does not adhere. This heater member is detachable and can be replaced according to the diameter of the branch pipe 2. And it heats and holds at 230 degrees. The heating of the three branch pipes 2 starts 10 seconds later than the heating start of the main pipe 1. The time during which the tip of the branch pipe 2 is inserted into the recess 9 is 20 seconds.

主管１の作業開始より３０秒が経過したら、加熱工具から主管１と分岐管２を外し、主管１の取付穴５に分岐管２の先端を３本同時に押し込む。この時、３本の分岐管２が、同じ力で取付穴５に押し込まれるように、３本の分岐管２が１本の押込み棒にクランプされることが好ましい。押し込んだ後、９０秒間加圧した状態を保つ。加圧は図３の（ａ）に示すような押込圧が望ましい。加圧が終ると融着が完了する。   When 30 seconds have elapsed from the start of the operation of the main pipe 1, the main pipe 1 and the branch pipe 2 are removed from the heating tool, and three tips of the branch pipe 2 are simultaneously pushed into the mounting holes 5 of the main pipe 1. At this time, it is preferable that the three branch pipes 2 are clamped to one push bar so that the three branch pipes 2 are pushed into the mounting hole 5 with the same force. After being pushed in, the pressure is maintained for 90 seconds. The pressurization is preferably an indentation pressure as shown in FIG. When the pressurization is completed, the fusion is completed.

図９は、このようにして３本の分岐管が主管に連設された場合の、１つの分岐管に注目した断面図である。図６のＡ−Ａ断面図に相当する。図１０は、同じく１つの分岐管に注目した断面図で、図６のＢ−Ｂ断面図に相当するものである。図１１は、取付穴５を斜めにあけ、分岐管２を斜めに取り付ける場合の、主管１と分岐管２の断面図である。図１１に示すように、取付穴５を斜めにあけた場合、第２の穴７の深さは左右で異なるものとなる。この場合、分岐管２は図２と同じものを使用し、分岐管２の先端を主管１に斜めに接合することができる。   FIG. 9 is a cross-sectional view paying attention to one branch pipe when three branch pipes are connected to the main pipe in this way. It corresponds to the AA cross-sectional view of FIG. FIG. 10 is a cross-sectional view focusing on one branch pipe, and corresponds to the cross-sectional view taken along the line BB in FIG. FIG. 11 is a cross-sectional view of the main pipe 1 and the branch pipe 2 when the mounting hole 5 is opened obliquely and the branch pipe 2 is attached obliquely. As shown in FIG. 11, when the attachment hole 5 is formed obliquely, the depth of the second hole 7 is different on the left and right. In this case, the same branch pipe 2 as that in FIG. 2 is used, and the tip of the branch pipe 2 can be obliquely joined to the main pipe 1.

熱交換器には、多数本の分岐管を主管に接続する場合があり、分岐の数は３本に限るものではない。なお、加熱工具２０、３０を一列に配置した構成の装置とすれば作業性が向上する。また、配管工事として工事現場で接続するような場合、穴あけ作業が正確に行なわれなければならない。主管１を固定して穴あけキリ１０が直角に当たるように、穴あけキリ１０の固定具が用意されれば、接合品質を向上させることができる。   In the heat exchanger, a large number of branch pipes may be connected to the main pipe, and the number of branches is not limited to three. In addition, if it is set as the apparatus of the structure which has arrange | positioned the heating tools 20 and 30 in a row, workability | operativity will improve. Also, when connecting at a construction site as piping work, the drilling work must be performed accurately. If a fixing tool for the drilling hole 10 is prepared so that the main pipe 1 is fixed and the drilling hole 10 hits at a right angle, the joining quality can be improved.

本発明による樹脂管の熱融着接合方法は、給水器、給湯器、暖房器、熱交換器などの主管から直角に分岐管を出す場合に好適である。   The method for heat-sealing and joining resin pipes according to the present invention is suitable when a branch pipe is taken out from a main pipe such as a water heater, a water heater, a heater, or a heat exchanger at a right angle.

本発明による熱融着接合作業後の主管と分岐管の接合部の断面図である。（実施例１）It is sectional drawing of the junction part of the main pipe and the branch pipe after the heat-fusion-bonding operation | work by this invention. Example 1 本発明による熱融着接合作業前の主管と分岐管の接合部の拡大された断面図である。（実施例１）It is the expanded sectional view of the junction part of the main pipe and the branch pipe before the heat-fusion-bonding operation | work by this invention. Example 1 本発明による熱融着接合作業後の主管と分岐管の接合部の断面図である。（ａ）は分岐管の押込圧が適切な場合、（ｂ）は分岐管の押込圧が弱い場合、（ｃ）は分岐管の押込圧が強い場合を示す。It is sectional drawing of the junction part of the main pipe and the branch pipe after the heat-fusion-bonding operation | work by this invention. (A) shows the case where the pushing pressure of the branch pipe is appropriate, (b) shows the case where the pushing pressure of the branch pipe is weak, and (c) shows the case where the pushing pressure of the branch pipe is strong. 主管にキリで穴をあける作業の模式図である。（実施例１）It is a schematic diagram of the work which drills a hole in a main pipe. Example 1 熱融着接合作業前の主管と分岐管の斜視図である。（実施例１）It is a perspective view of a main pipe and a branch pipe before heat fusion bonding work. Example 1 熱融着接合作業後の主管と分岐管の斜視図である。（実施例１）It is a perspective view of a main pipe and a branch pipe after heat fusion joining work. Example 1 主管用の加熱工具の斜視図である。（実施例１）It is a perspective view of the heating tool for main pipes. Example 1 分岐管用の加熱工具の斜視図である。（実施例１）It is a perspective view of the heating tool for branch pipes. Example 1 図６のＡ−Ａ断面図である。（実施例１）It is AA sectional drawing of FIG. Example 1 図６のＢ−Ｂ断面図である。（実施例１）It is BB sectional drawing of FIG. Example 1 分岐管を主管に斜めに取り付ける場合の断面図である。（実施例１）It is sectional drawing in the case of attaching a branch pipe to a main pipe diagonally. Example 1

符号の説明Explanation of symbols

１ 大口径の主管
２ 小口径の分岐管
３ 熱融着部
４ 段部
５ 取付穴
６ 第１の穴
７ 第２の穴
８ 凸部
９ 凹部
１０ 穴あけキリ
１１ 座ぐり用カッター
２０ 主管用の加熱工具
３０ 分岐管用の加熱工具
ｔ１ 主管の肉厚
ｔ２ 第１の穴の深さ
ｔ１０ 第１の穴の外径
ｔ２０ 第２の穴の外径 DESCRIPTION OF SYMBOLS 1 Large-diameter main pipe 2 Small-diameter branch pipe 3 Heat fusion part 4 Step part 5 Mounting hole 6 1st hole 7 2nd hole 8 Convex part 9 Concave part 10 Drilling hole 11 Counterbore cutter 20 Heating for main pipe Tool 30 Heating tool for branch pipe t1 Wall thickness of main pipe t2 Depth of first hole t10 Outer diameter of first hole t20 Outer diameter of second hole

Claims (2)

ポリブテン、ポリエチレンまたはポリプロピレン製の小口径の分岐管を、該分岐管より径が大きく、同じ材質の大口径の主管に直角または斜めに融着接合する場合、該主管に取付穴をあけ、該取付穴の入口周辺及び該分岐管の挿入部分の外周を加熱して接合することを特徴とする樹脂管の熱融着接合方法。   When a small-diameter branch pipe made of polybutene, polyethylene, or polypropylene is fusion bonded at right angles or obliquely to a large-diameter main pipe of the same material that is larger in diameter than the branch pipe, a mounting hole is formed in the main pipe A method for heat-sealing and joining resin tubes, characterized by heating and joining the periphery of an inlet of a hole and the outer periphery of an insertion portion of the branch tube. 前記取付穴は、前記主管の内部に貫通し前記分岐管の内径に合わせた穴径を有する第１の穴と、前記分岐管の外径に合わせた穴径を有する第２の穴とで構成され、前記第１の穴と前記第２の穴の間に前記分岐管を係止させる段部が形成されていることを特徴とする請求項１記載の樹脂管の熱融着接合方法。   The mounting hole includes a first hole that penetrates into the main pipe and has a hole diameter that matches the inner diameter of the branch pipe, and a second hole that has a hole diameter that matches the outer diameter of the branch pipe. The method for heat-sealing and joining resin pipes according to claim 1, wherein a step portion for locking the branch pipe is formed between the first hole and the second hole.
JP2006075707A 2006-03-17 2006-03-17 Heat fusion joining method of resin tube Pending JP2007247869A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017024352A (en) * 2015-07-27 2017-02-02 株式会社 テスク資材販売 Plastic pipe heat fusion joining device and method for producing plastic pipe joined product

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10314333A (en) * 1997-05-16 1998-12-02 Yamato Protec Co Water branching header for sprinkler fire-extinguishing piping
JPH11118084A (en) * 1997-10-16 1999-04-30 Mitsubishi Plastics Ind Ltd Method for welding branch pipe fitting

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10314333A (en) * 1997-05-16 1998-12-02 Yamato Protec Co Water branching header for sprinkler fire-extinguishing piping
JPH11118084A (en) * 1997-10-16 1999-04-30 Mitsubishi Plastics Ind Ltd Method for welding branch pipe fitting

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017024352A (en) * 2015-07-27 2017-02-02 株式会社 テスク資材販売 Plastic pipe heat fusion joining device and method for producing plastic pipe joined product

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