JP2013028081A - Iron for heating connection end of three-layer pipe and pipe joint, heating device that uses the iron and heating method - Google Patents

Iron for heating connection end of three-layer pipe and pipe joint, heating device that uses the iron and heating method Download PDF

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JP2013028081A
JP2013028081A JP2011165965A JP2011165965A JP2013028081A JP 2013028081 A JP2013028081 A JP 2013028081A JP 2011165965 A JP2011165965 A JP 2011165965A JP 2011165965 A JP2011165965 A JP 2011165965A JP 2013028081 A JP2013028081 A JP 2013028081A
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pipe
layer
heating
joint
pipe joint
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Takeshi Maejima
岳 前島
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TECHNO FUREKKUSU KK
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TECHNO FUREKKUSU 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
    • 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
    • B29C66/124—Tongue and groove joints
    • B29C66/1244—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue
    • B29C66/12441—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue being a single wall
    • 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"
    • 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"
    • B29C65/2053—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 special ways of bringing the welding mirrors into position
    • B29C65/2084—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 special ways of bringing the welding mirrors into position by pivoting
    • 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
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/30—Electrical means
    • B29C65/305—Electrical means involving the use of cartridge heaters
    • 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
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7841—Holding or clamping means for handling purposes
    • 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
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
    • 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
    • B29C66/72—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 structure of the material of the parts to be joined
    • B29C66/723—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 structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—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 structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72321—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 structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
    • 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
    • B29C66/739—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 material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—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 material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—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 material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • 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
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/841—Machines or tools adaptable for making articles of different dimensions or shapes or for making joints of different dimensions
    • B29C66/8414—Machines or tools adaptable for making articles of different dimensions or shapes or for making joints of different dimensions of different diameter
    • 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
    • B29C66/70—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
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
    • B29K2705/02—Aluminium
    • 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
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
    • B29K2705/08—Transition metals
    • B29K2705/10—Copper
    • 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
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
    • B29K2705/08—Transition metals
    • B29K2705/12—Iron

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

Abstract

PROBLEM TO BE SOLVED: To provide an iron for heating a connection end of a three-layer pipe and a pipe joint that enables melting connection of the resin-coated metal three-layer pipe and the resin made pipe joint.SOLUTION: The iron for heating the pipe end to fuse a joint surface of an end 7a of resin coated metal three-layer pipe 7 and an end 8a of a resin made pipe joint 8 that includes a three-layer pipe insertion groove 11 that touches resin coating layers 13 and 14 on both inside and outside sides of the end 7a of three-layer pipe 7 and includes: (a) a three-layer pipe heated body 3 that has a back surface fixed to the iron core 2, with a circumferential groove 9 insertably corresponding to the end 7a of the three-layer pipe 7 being formed in the front surface; (b) a joint heating body 4 that has a back surface fixed to the iron core 2 and includes a tubular projection 10 insertably corresponding to the three-layer pipe insertion groove 11 of the pipe joint 8 in the front surface; and (c) an electric heater 5 fixed to the base 2a of the iron core 2 and an electric cord 6 to transmit electricity to the heater 5.

Description

本発明は、樹脂被覆金属三層管の端部と樹脂製管継手の端部とを溶融接続する際に、両者の接続部分を加熱して溶融するための三層管と管継手の接続端部加熱用鏝と、その鏝を用いた三層管と管継手の接続端部の加熱装置及び加熱方法に関する。   The present invention provides a connecting end of a three-layer tube and a pipe joint for heating and melting the connecting portion between the end of the resin-coated metal three-layer pipe and the end of the resin pipe joint. The present invention relates to a part heating rod, a heating device and a heating method for a connecting end portion of a three-layer pipe and a pipe joint using the rod.

ポリエチレン等の樹脂管を樹脂製管継手で接続する場合、樹脂同士の接着剤による接続が困難であるため、従来、接続面を加熱溶融して融着することが行われている。
例えば、下記特許文献１には、管と継手の接続部分を加熱溶融して接続する「熱可塑性樹脂の融着接続方法」が提案されている。この方法では、図７に示すように、管状の突起Ａと柱状の突起ＢをヒータＣで加熱する加熱治具を用いて、管状の突起Ａで樹脂管Ｄの外周部分を加熱溶融し、柱状の突起Ｂで樹脂製継手Ｅの接続部分を加熱溶融し、その溶融部分を接合させて両者を溶着することが可能となる。 When connecting resin pipes made of polyethylene or the like with resin pipe joints, it is difficult to connect the resin to each other with an adhesive, and conventionally, the connection surfaces are heated and melted to be fused.
For example, Patent Document 1 below proposes a “thermoplastic resin fusion splicing method” in which a connection portion between a pipe and a joint is heated and melted. In this method, as shown in FIG. 7, the outer periphery of the resin tube D is heated and melted with the tubular projection A using a heating jig that heats the tubular projection A and the columnar projection B with the heater C, and the columnar shape. It is possible to heat and melt the connecting portion of the resin joint E with the projection B, and join the melted portions to weld them together.

特公昭６４−６０１８号公報Japanese Patent Publication No. 64-6018

しかしながら、上記特許文献１の技術では、一般的な樹脂製の管の外周面と樹脂製の管継手の内周面とを溶融させて接合することはできても、金属管の内外に樹脂層を有する樹脂被覆金属三層管の場合では、内外の樹脂層を同時に溶融させて管継手に接合することはできない。   However, in the technique of the above-mentioned patent document 1, even if the outer peripheral surface of a general resin pipe and the inner peripheral surface of a resin pipe joint can be melted and joined, a resin layer is formed inside and outside the metal pipe. In the case of a resin-coated metal three-layer pipe having the following, the inner and outer resin layers cannot be simultaneously melted and joined to the pipe joint.

そこで本発明は、前記樹脂被覆金属三層管（以下「三層管」と呼ぶ）の内外両側の樹脂層を樹脂製管継手（以下「管継手」と呼ぶ）に融着により接続可能とするために、両者の接続端部を加熱して溶融するための三層管と管継手の接続端部加熱用鏝と、その鏝を用いた三層管と管継手の接続端部の加熱装置及び加熱方法を提供することを目的とする。   Therefore, the present invention enables the resin layers on both the inner and outer sides of the resin-coated metal three-layer pipe (hereinafter referred to as “three-layer pipe”) to be connected to a resin pipe joint (hereinafter referred to as “pipe joint”) by fusion bonding. For this purpose, a three-layer tube and pipe joint heating rod for heating and melting the connection end of both, a heating device for the connection end of the three-layer pipe and pipe joint using the rod, and An object is to provide a heating method.

上記課題を解決するための三層管と管継手の接続端部加熱用鏝における請求項１に記載の発明は、樹脂被覆金属三層管の端部と、該三層管の端部の内外両側の樹脂被覆層に当接する三層管端部差込溝を備えた樹脂製管継手の端部との接合面を融着するための三層管と管継手の接続端部加熱用鏝であって、ａ）鏝芯に背面を固定し、前面に前記三層管の端部に差込可能に対応する円周溝を形成した三層管加熱体と、ｂ）前記鏝芯に背面を固定し、前面に前記管継手の三層管端部差込溝に差込可能に対応する管状突起を備えた継手加熱体と、ｃ）鏝芯の基部に固定した電気ヒータと、そのヒータに送電する電気コードとを備えて成ることを特徴とする。   The invention according to claim 1 in the connecting end heating rod between the three-layer pipe and the pipe joint for solving the above-mentioned problems is the end of the resin-coated metal three-layer pipe and the inside and outside of the end of the three-layer pipe. A three-layer pipe and pipe joint connecting end heating rod for fusing the joint surface with the end of the resin pipe joint with the three-layer pipe end insertion groove abutting against the resin coating layer on both sides A) a three-layer tube heating body in which a back surface is fixed to the core and a circumferential groove corresponding to the front end of the three-layer tube is formed so as to be insertable; and b) a back surface on the core. A joint heating body having a tubular protrusion that is fixed and has a tubular protrusion corresponding to the three-layer pipe end insertion groove of the pipe joint on the front surface; c) an electric heater fixed to the base of the core; And an electric cord for transmitting power.

請求項２に記載の発明は、上記発明おいて、鏝芯の継手加熱体の内部に前記管継手の内径と等しい外径の円柱状の管内支持芯を前記管継手の三層管端部差込溝の深さと同程度の高さに形成したことを特徴とする。   According to a second aspect of the present invention, in the above invention, a cylindrical in-tube support core having an outer diameter equal to the inner diameter of the pipe joint is disposed inside the core-joint joint heating body. It is characterized in that it is formed at a height similar to the depth of the recessed groove.

請求項３に記載の発明は、上記各発明おいて、前記鏝芯に三層管加熱体と継手加熱体とを背合わせに設けたことを特徴とする。   The invention described in claim 3 is characterized in that, in each of the above inventions, a three-layer tube heating body and a joint heating body are provided back to back on the core.

請求項４に記載の発明は、上記発明おいて、前記鏝芯に複数対の三層管加熱体及び継手加熱体を設けたことを特徴とする。   The invention described in claim 4 is characterized in that, in the above invention, a plurality of pairs of three-layer tube heaters and joint heaters are provided on the core.

請求項５に記載の発明は、上記各発明おいて、前記背中合わせの三層管加熱体と継手加熱体とを、各々の中心線を共通の中心線となるように配設したことを特徴とする。   The invention according to claim 5 is characterized in that, in each of the above-described inventions, the back-to-back three-layer tube heating body and the joint heating body are arranged so that the center lines thereof become a common center line. To do.

請求項６に記載の発明は、上記各発明おいて、前記三層管加熱体の円周溝及び継手加熱体の管状突起の各表面に、ポリテトラフルオロエチレンの被覆層を形成したことを特徴とする。   The invention according to claim 6 is characterized in that, in each of the above inventions, a polytetrafluoroethylene coating layer is formed on each surface of the circumferential groove of the three-layer tube heating body and the tubular protrusion of the joint heating body. And

請求項７に記載の発明は、上記請求項１から６のうちいずれかに記載の三層管と管継手の接続端部加熱用鏝を用いた管端部加熱装置であって、前記三層管と管継手の接続端部加熱用鏝を支持台に固定し、ａ）前記三層管と管継手の接続端部加熱用鏝の三層管加熱体の円周溝に対向させて前記三層管の端部を把持する送りクランプを設けるとともに該送りクランプの基部には前記円周溝に向けて進退可能とするクランプ移動台を設け、ｂ）前記三層管と管継手の接続端部加熱用鏝の継手加熱体の管状突起に対向させて前記管継手の端部を把持する送りチャックを設けるとともに該送りチャックの基部には前記管状突起に向けて進退可能とするチャック移動台を設けたことを特徴とする。   The invention according to claim 7 is a pipe end heating device using the connection end heating rod of the three-layer pipe and pipe joint according to any one of claims 1 to 6, wherein the three-layer pipe A connecting end heating rod between the pipe and the pipe joint is fixed to a support, and a) the three-layer pipe and the connecting end heating rod between the pipe joint are opposed to the circumferential groove of the three-layer tube heating body. A feed clamp for gripping the end of the layer pipe and a base for the clamp that is movable toward and away from the circumferential groove; b) a connecting end of the three-layer pipe and the pipe joint A feed chuck for gripping the end of the pipe joint is provided facing the tubular protrusion of the joint heating body of the heating rod, and a chuck moving base is provided at the base of the feed chuck so as to be able to advance and retract toward the tubular protrusion. It is characterized by that.

請求項８に記載の発明は、上記請求項７に記載の発明おいて、ａ）前記支持台を送りクランプと送りチャックから離れるように移動可能とする鏝移動機構を設け、ｂ）前記送りクランプ及び／又は前記送りチャックの移動台を、把持した前記三層管の端部と前記管継手の端部とが接合可能な位置に移動可能とする台移動手段を設けたことを特徴とする。   According to an eighth aspect of the present invention, in the invention according to the seventh aspect of the present invention, a) a scissor moving mechanism is provided that allows the support base to move away from the feed clamp and the feed chuck; and b) the feed clamp. And / or a moving means for moving the feed chuck is provided, which is capable of moving to a position where the gripped end of the three-layer pipe and the end of the pipe joint can be joined.

請求項９に記載の発明は、上記請求項１から６のうちいずれかに記載の三層管と管継手の接続端部加熱用鏝を用いた三層管と管継手の接続端部の加熱方法であって、内外両側の樹脂被覆層の厚さが３ｍｍ以上の熱溶融性ポリエチレン層を有する樹脂被覆金属三層管を対象とし、ａ）三層管と管継手の接続端部加熱用鏝で前記三層管を加熱する時間を３〜４秒に設定し、且つ加熱する温度を２８０〜３００°Ｃに設定して前記各樹脂被覆層の金属管側に非溶融部分を残して表層を溶融し、ｂ）同時に、前記三層管と管継手の接続端部加熱用鏝で、樹脂製管継手の三層管端部差込溝の内面を加熱して管の内側と外側に非溶融部分を残して該内面表層を溶融し、ｃ）その溶融中に前記管継手の三層管端部差込溝に前記三層管の加熱端部を差し込んで両者を融着することを特徴とする。   Invention of Claim 9 is heating of the connection end part of a three-layer pipe and a pipe joint using the scissors for connecting end part heating of the three-layer pipe and pipe joint in any one of the said Claim 1 to 6 A method for a resin-coated metal three-layer tube having a heat-meltable polyethylene layer having a thickness of 3 mm or more on both the inner and outer resin coating layers, and a) a connecting end heating rod for a three-layer tube and a pipe joint The heating time of the three-layer tube is set to 3 to 4 seconds, and the heating temperature is set to 280 to 300 ° C., leaving a non-melted portion on the metal tube side of each resin coating layer. B) At the same time, the inner surface of the three-layer pipe end insertion groove of the resin pipe joint is heated by the connecting end heating rod between the three-layer pipe and the pipe joint so that the inner and outer sides of the pipe are not melted. C) melting the inner surface layer leaving a part, and c) inserting the heating end of the three-layer pipe into the three-layer pipe end insertion groove of the pipe joint during the melting Characterized by fusing the person.

本発明の三層管と管継手の接続端部加熱用鏝は、鏝芯に前記三層管の端部に差込可能に対応する円周溝を有する三層管加熱体と、三層管端部差込溝を有する継手加熱体とが備わっているので、金属管をポリエチレンなどの熱溶融性樹脂で内外から被覆した樹脂被覆金属三層管と樹脂製管継手との接続部分を、加熱した三層管加熱体と継手加熱体にそれぞれ差し込むことで、該三層管の内外両側の樹脂表面と、前記管継手の三層管端部差込溝の内面との接合面を確実に溶融させることが可能となる。
このため、両者を溶融させた直後に三層管端部差込溝に前記三層管の端部を差込んで接合することで、前記三層管の内外の樹脂被覆層と前記管継手の三層管を挟む溶融部分同士が融着してその接合部分を強固に密着一体化させることが可能となる。
また、その接合部分は両者が一体化されて肉厚となるので、通常では部分的に弱体化するとされる管の継手部分の強度をより高めることができる。
さらに、前記三層管の金属管の切り口端部は、接続後に管内部に又は管外部に露出する部分が全て樹脂で覆われて保護されるため、金属管端部の腐食が防止できて使用寿命を大幅に伸ばすことが可能となる。 The connection end portion heating rod of the three-layer tube and pipe joint of the present invention has a three-layer tube heating body having a circumferential groove corresponding to a core that can be inserted into the end of the three-layer tube, and a three-layer tube Because it has a joint heating element with an end insertion groove, the connection part between the resin-coated metal three-layer pipe with a metal pipe covered with a heat-melting resin such as polyethylene from the inside and outside and the resin pipe joint is heated. By inserting the three-layer pipe heating body and the joint heating body respectively, the joint surface between the inner and outer resin surfaces of the three-layer pipe and the inner surface of the three-layer pipe end insertion groove of the pipe joint is surely melted. It becomes possible to make it.
For this reason, immediately after melting both, the end of the three-layer pipe is inserted into the three-layer pipe end insertion groove and joined, so that the resin coating layer inside and outside the three-layer pipe and the pipe joint The melted parts sandwiching the three-layer tube are fused together, and the joined parts can be firmly and closely integrated.
In addition, since the joint portion is integrated and becomes thick, it is possible to further increase the strength of the joint portion of the pipe that is normally partially weakened.
Furthermore, the cut end of the metal pipe of the three-layer pipe is protected by being covered with resin to protect all the parts exposed inside or outside the pipe after connection. The service life can be greatly extended.

請求項２に記載の発明は、前記鏝芯の継手加熱体の内部に円柱状の管内支持芯を形成したことで、該管内支持芯が、加熱中に前記管継手に差し込まれて管内支持管の外周面で前記管継手の内部が変化されるのを防ぎ、前記管継手への管内支持管の装着作業の工程がなくなり、その分、作業効率を高めることが可能となる。   According to a second aspect of the present invention, since a cylindrical in-tube support core is formed inside the core joint heating body, the in-pipe support core is inserted into the pipe joint during heating, and the in-pipe support tube It is possible to prevent the inside of the pipe joint from being changed on the outer peripheral surface of the pipe and to eliminate the process of attaching the pipe support pipe to the pipe joint, thereby improving work efficiency.

請求項３に記載の発明は、前記鏝芯に三層管加熱体と継手加熱体とを背合わせにしたので、前記三層管の端部と前記管継手の端部を両側で同時に加熱することができる。このため効率良く融着作業を行うことが可能となる。   In the invention according to claim 3, since the three-layer tube heater and the joint heater are back-to-back with the core, the end of the three-layer tube and the end of the tube joint are heated simultaneously on both sides. be able to. For this reason, it is possible to perform the fusion work efficiently.

請求項４に記載の発明は、前記鏝芯に複数対の三層管加熱体及び継手加熱体を設けたことで、１個の鏝で複数のサイズの前記三層管と前記管継手に対応可能となる。
即ち、取り付け交換せずに、１個の鏝で異なるサイズの前記三層管と前記管継手の融着作業を効率良く行うことが可能となる。 The invention according to claim 4 is provided with a plurality of pairs of three-layer tube heaters and joint heaters on the core, so that a single rod can handle the three-layer tube and the pipe joint of a plurality of sizes. It becomes possible.
That is, it is possible to efficiently perform the fusion work of the three-layer pipes and the pipe joints having different sizes with a single rod without changing the attachment.

請求項５に記載の発明は、前記三層管の端部と前記管継手の端部との管中心線が共通するので、前記三層管の端部を把持する送りクランプと前記管継手の端部を把持する送りチャックの移動が、その中心線に沿って対向側で正確に行うことができ、前記三層管と前記管継手とを正確位置で接続することが可能となる。   Since the pipe center line of the end part of the three-layer pipe and the end part of the pipe joint is common, the feed clamp for gripping the end part of the three-layer pipe and the pipe joint of the invention described in claim 5 The feed chuck for gripping the end can be accurately moved on the opposite side along the center line, and the three-layer pipe and the pipe joint can be connected at an accurate position.

請求項６に記載の発明は、前記三層管加熱体の円周溝の表面と継手加熱体の管状突起の表面とに、ポリテトラフルオロエチレンの被覆層を形成することで、鏝に溶融した樹脂の付着が防止され円滑に繰り返し使用することができる。   The invention according to claim 6 is melted into the ridge by forming a polytetrafluoroethylene coating layer on the surface of the circumferential groove of the three-layer tube heating body and the surface of the tubular protrusion of the joint heating body. Resin adhesion is prevented and it can be used repeatedly and smoothly.

請求項７に記載の三層管と管継手の接続端部の加熱装置では、前記三層管と管継手の接続端部加熱用鏝の管状突起と円周溝とに対向して送りクランプが前記三層管の端部を把持して進退可能となり、また送りチャックが前記管継手の端部を把持して進退可能となる。
このため、前記三層管の端部と前記管継手の端部に同時的に嵌合することと外すことができ、前記三層管と管継手の接続端部加熱用鏝の三層管加熱体の円周溝を三層管端部へと円滑に嵌合することができ、また前記継手加熱体の管状突起を樹脂製管継手の三層管端部差込溝の内にも円滑に嵌合することが可能となる。
さらに、溶融後、三層管の端部と管継手の端部から前記三層管加熱体と継手加熱体を円滑に引き離すことが可能となる。
そして、溶融部分の温度が低下しないうち前記三層管の端部と前記管継手の端部とを溶融状態で速やかに接合させることが可能となる。 In the heating device for the connection end portion of the three-layer pipe and the pipe joint according to claim 7, a feed clamp is opposed to the tubular projection and the circumferential groove of the connection end portion heating rod of the three-layer pipe and the pipe joint. The end portion of the three-layer pipe can be held and moved forward and backward, and the feed chuck can hold the end portion of the pipe joint and move forward and backward.
Therefore, the end of the three-layer pipe and the end of the pipe joint can be simultaneously fitted and removed, and the three-layer pipe heating of the connecting end heating rod of the three-layer pipe and the pipe joint is possible. The circumferential groove of the body can be smoothly fitted to the end of the three-layer pipe, and the tubular protrusion of the joint heating body can be smoothly inserted into the three-layer pipe end insertion groove of the resin pipe joint. It becomes possible to fit.
Furthermore, after melting, the three-layer tube heater and the joint heater can be smoothly separated from the end of the three-layer tube and the end of the pipe joint.
And while the temperature of a fusion | melting part does not fall, it becomes possible to join the edge part of the said three-layer pipe and the edge part of the said pipe joint rapidly in a molten state.

請求項８に記載の発明は、前記支持台を送りクランプと送りチャックとの間から外へ移動可能とする鏝移動機構によって、三層管と管継手を把持させたままで、溶融後、直ちに前記三層管の端部と前記管継手の端部が嵌合可能な位置にまで移動して、前記三層管の端部と前記管継手の端部とを効率良く融着することが可能となる。   The invention according to claim 8 is characterized in that, immediately after melting, the three-layer pipe and the pipe joint are held by the scissor moving mechanism that enables the support base to move from between the feed clamp and the feed chuck. The end of the three-layer pipe and the end of the pipe joint are moved to a position where they can be fitted, and the end of the three-layer pipe and the end of the pipe joint can be efficiently fused. Become.

請求項９に記載の発明は、三層管の樹脂被覆層の金属管側に非溶融部分を残して表層のみを溶融させることが可能となる。そして、前記三層管の端部と前記管継手の端部との接触面を強固に融着一体化することが可能となる。   According to the ninth aspect of the present invention, only the surface layer can be melted while leaving a non-melted portion on the metal tube side of the resin coating layer of the three-layer tube. And it becomes possible to firmly fuse and integrate the contact surface between the end of the three-layer pipe and the end of the pipe joint.

本発明の三層管と管継手の接続端部の加熱装置の（イ）が加熱前を示し、（ロ）が加熱中の状態を示す一部要部を縦断した側面図である。(A) of the heating apparatus of the connection end part of the three-layer pipe of this invention and a pipe joint is the side view which cut through the one part principal part which shows the state before a heating, (b) shows the state in heating. 本発明の三層管と管継手の接続端部の加熱装置の（ハ）が加熱後鏝を外した状態を示し、（ニ）が接続した状態を示す一部要部を縦断した側面図である。(C) of the heating device at the connection end of the three-layer pipe and pipe joint of the present invention shows a state in which the flaw is removed after heating, and (d) is a side view in which a part of the main part showing the connected state is cut vertically. is there. 本発明の（イ）が三層管と管継手の接続端部加熱用鏝、（ロ）が樹脂被覆金属三層管、（ハ）が樹脂製管継手を示す各縦断斜視図である。(A) of the present invention is a connecting end heating rod for a three-layer pipe and a pipe joint, (b) is a resin-coated metal three-layer pipe, and (c) is a vertical perspective view showing a resin pipe joint. 樹脂被覆金属三層管と樹脂製管継手の接続状態の（イ）が加熱直後を示し、（ロ）が接続後を示す各縦断側面図である。(A) of the connection state of the resin-coated metal three-layer pipe and the resin pipe joint shows immediately after heating, and (b) is a longitudinal side view showing the state after connection. 一対の三層管加熱体と継手加熱体を複数設けた鏝を示す三層管と管継手の接続端部加熱用鏝の縦断斜視図である。It is a vertical perspective view of a connection end portion heating rod of a three-layer tube and a pipe joint showing a rod provided with a plurality of pairs of three-layer tube heaters and a joint heater. 別の形態の（イ）が三層管と管継手の接続端部加熱用鏝、（ロ）が樹脂被覆金属三層管、（ハ）が樹脂製管継手を示す各縦断側面図である。FIG. 5 is a longitudinal side view showing another embodiment of (a) a connecting end heating rod for a three-layer pipe and a pipe joint, (b) a resin-coated metal three-layer pipe, and (c) a resin pipe joint. 従来の加熱装置の加熱部分を示す縦断側面図であるIt is a vertical side view which shows the heating part of the conventional heating apparatus.

以下、本発明の実施形態を図に基づいて説明する。
本発明で接続対象となる樹脂被覆金属三層管７は、図４に示すように、肉薄の金属管１２の内側と外側に樹脂被覆層１３、１４を有する樹脂被覆金属三層管７である。
前記金属管１２の材質は、アルミニウム、銅、ステンレス、鋼及びそれらの合金など各種金属管材が使用できる。
そして該金属管１２の内側と外側を被覆する樹脂材１３、１４は、熱溶融性のＰＥＲＴ（Ｐｏｌｙ Ｅｔｈｙｌｅｎｅ Ｒａｉｓｅｄ Ｔｅｍｐｅｒａｔｕｒｅ ｒｅｓｉｓｔａｎｃｅ）の高分子ポリエチレン化合物等の使用が可能である。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 4, the resin-coated metal three-layer tube 7 to be connected in the present invention is a resin-coated metal three-layer tube 7 having resin coating layers 13 and 14 inside and outside a thin metal tube 12. .
As the material of the metal tube 12, various metal tube materials such as aluminum, copper, stainless steel, steel and alloys thereof can be used.
The resin materials 13 and 14 covering the inside and the outside of the metal tube 12 can be made of a heat-meltable PERT (Poly Ethylene Raised Temperature Resistance) high molecular polyethylene compound.

例えば、前記三層管７がスプリンクラー用送水管の場合では、前記三層管７のサイズは、管の内径２０ｍｍ、内側の樹脂部分の肉厚さが４ｍｍ、外側の樹脂部分の肉厚さが３ｍｍ、薄肉の金属管１０の肉厚が２．２５ｍｍのものが使用に適する。その理由は、このサイズであるとスプリンクラー用の送水管としての強度を満足し、且つ湾曲性にも優れているからである。
該スプリンクラー用送水管は、配管施工の際、湾曲させたときにポリエチレン樹脂被覆層１３、１４が薄肉の金属管１２をその内側から構造的に支え、また伸び率が７７３％と大きい前記ポリエチレン層が三層管の外側を保護し、中の薄肉の金属管１２が座屈することを効果的に防止できる。しかし、屈曲が鋭角である場合では座屈が生じ易くなるのでエルボウ継手などの管継手８を介在させることが必要となる。 For example, when the three-layer pipe 7 is a sprinkler water pipe, the three-layer pipe 7 has a size of an inner diameter of the pipe of 20 mm, an inner resin portion having a thickness of 4 mm, and an outer resin portion having a thickness of 4 mm. A thin metal tube 10 having a thickness of 2.25 mm is suitable for use. The reason is that this size satisfies the strength as a water pipe for a sprinkler and is excellent in curvature.
When the water pipe for sprinkler is bent during piping construction, the polyethylene resin coating layers 13 and 14 structurally support the thin metal pipe 12 from the inside, and the polyethylene layer has a large elongation rate of 773%. Protects the outside of the three-layer tube and can effectively prevent the thin metal tube 12 inside from buckling. However, when the bend is an acute angle, buckling is likely to occur, and it is necessary to interpose a pipe joint 8 such as an elbow joint.

また本発明では接続対象となる樹脂製管継手８は、図４に示すように、継ぎ口の開口端部８ａに開口部の内周に沿って一周した奥の深い円形の三層管端部差込溝１１を備える。
該三層管端部差込溝１１の溝幅は溝開口部では前記三層管７の肉厚と同サイズ又は若干広い幅にするとともに、最深部では前記三層管７の金属管１２部分の肉厚よりも広く且つ該三層管７を温めた管の肉厚よりも若干狭く形成される。
また、該管継手８の径は、該三層管７の流路のネックとなるのを避けるため前記三層管２と略同内径程度の径とした管継手８を用いるのが好ましい。 Further, in the present invention, the resin pipe joint 8 to be connected is, as shown in FIG. 4, a deep circular three-layer pipe end that goes around the inner end of the opening at the opening end 8a of the joint. The insertion groove 11 is provided.
The groove width of the three-layer tube end insertion groove 11 is the same as or slightly wider than the wall thickness of the three-layer tube 7 at the groove opening, and the metal tube 12 portion of the three-layer tube 7 at the deepest portion. The wall thickness is larger than the thickness of the tube and the wall thickness of the tube where the three-layer tube 7 is warmed is slightly narrower.
Further, it is preferable to use a pipe joint 8 having a diameter of about the same inner diameter as that of the three-layer pipe 2 so as to avoid the neck of the flow path of the three-layer pipe 7.

なお、前記樹脂製管継手８には、図４に示すように、該三層管７と同内径で、前記管差込溝１１の深さと同程度の長さとした薄い銅等の金属製の肉薄管内支持管１５を用意し、加熱させた前記管継手８の開口端部８ａに装着すると良い。これは、加熱で前記管継手８の内径側に生じる樹脂の溶融による変形やダレを防ぐものである。   As shown in FIG. 4, the resin pipe joint 8 is made of a metal such as thin copper having the same inner diameter as the three-layer pipe 7 and a length similar to the depth of the pipe insertion groove 11. A thin tube inner support tube 15 is prepared and attached to the heated open end 8a of the pipe joint 8. This prevents deformation and sagging due to melting of the resin that occurs on the inner diameter side of the pipe joint 8 due to heating.

そして、接続する際には、図４の（ロ）に示すように、前記樹脂被覆層１２、１３を加熱溶融させた前記三層管７の開口端部７ａを前記管継手８の三層管端部差込溝１１（図４の（イ）中の符号Ｍで示す）に樹脂被覆層１３、１４を変形させつつ開口端部７ａが最深部に達するまで圧入して両者を密着一体化する。
このように融着することで前記三層管７が前記管継手８に強固に接続し、その接合部分の金属は樹脂で覆われるため、腐食は起こらず、液漏れの事故がなくなる。 When connecting, as shown in FIG. 4B, the open end 7a of the three-layer pipe 7 in which the resin coating layers 12 and 13 are heated and melted is connected to the three-layer pipe of the pipe joint 8. The resin coating layers 13 and 14 are deformed into the end insertion groove 11 (denoted by the symbol M in FIG. 4 (a)) until the open end 7a reaches the deepest part, and both are closely integrated. .
By fusing in this way, the three-layer pipe 7 is firmly connected to the pipe joint 8 and the metal at the joint portion is covered with resin, so that corrosion does not occur and an accident of liquid leakage is eliminated.

本発明は、以上の如き前記樹脂被覆金属三層管と前記樹脂製管継手とを融着する際に、両者の接続端部を加熱して溶融するために用いる三層管と管継手の接続端部加熱用鏝（以下「鏝」と呼ぶ）と、その鏝を用いた三層管と管継手の接続端部の加熱装置及び管端部加熱方法であり、それらの本発明のうち、先ず鏝の形態から先に説明する。   In the present invention, when the resin-coated metal three-layer pipe and the resin pipe joint as described above are fused, the connection between the three-layer pipe and the pipe joint used for heating and melting the connecting end portions of the two is provided. An end heating rod (hereinafter referred to as “鏝”), a heating device and a tube end heating method for a connecting end portion of a three-layer pipe and a pipe joint using the rod, and of these inventions, The form of the bag will be described first.

本発明の鏝は、図３に示すように、前記三層管７の端部７ａと、該三層管７の端部７ａの内外両側の樹脂被覆層１３、１４の表面に当接する三層管端部差込溝１１を備えた前記管継手８の端部８ａとの接合面を融着するための金鏝である。
該鏝にはａ）銅製の鏝芯２に背面を固定し、前面に前記三層管７の端部７ａに差込可能に対応する円周溝９を形成した鉄製の三層管加熱体３と、ｂ）前記銅製鏝芯２に背面を固定し、前面に前記管継手８の三層管端部差込溝１１に差込可能に対応する管状突起１０を備えた鉄製の継手加熱体４と、を鏝芯２の両面に背中合わせに備える。
そして、前記鏝芯２の基部２ａに電気ヒータ５を固定し、そのヒータ５に送電する電気コード６を接続する。そして電気コード６を電源に接続して電気ヒータ５を加熱できるようにする。このため前記鏝芯２が前記電気ヒータ５で加熱されて熱伝導性の優れた金属製の該鏝芯２を熱が伝わり、該鏝芯２に設けた前記三層管加熱体３と継手加熱体４とを加熱する。 As shown in FIG. 3, the bag of the present invention has a three-layer structure in contact with the end portion 7 a of the three-layer tube 7 and the resin coating layers 13 and 14 on both the inner and outer sides of the end portion 7 a of the three-layer tube 7. It is a hammer for fusing the joint surface with the end 8a of the pipe joint 8 provided with the pipe end insertion groove 11.
The iron has a three-layer tube heating body 3 in which a) a back surface is fixed to a copper core 2 and a circumferential groove 9 corresponding to an end portion 7a of the three-layer tube 7 is formed on the front surface. And b) an iron joint heater 4 having a back surface fixed to the copper core 2 and a front surface provided with a tubular protrusion 10 that can be inserted into the three-layer tube end insertion groove 11 of the pipe joint 8. Are provided back to back on both sides of the core 2.
And the electric heater 5 is fixed to the base 2a of the said core 2, and the electric cord 6 which transmits electric power to the heater 5 is connected. Then, the electric cord 6 is connected to a power source so that the electric heater 5 can be heated. Therefore, the core 2 is heated by the electric heater 5 and heat is transmitted through the metal core 2 having excellent thermal conductivity, and the three-layer tube heating body 3 provided on the core 2 and joint heating The body 4 is heated.

また、前記三層管加熱体３の円周溝９の深さと、継手加熱体４と管状突起１０の突出長さとは、接続対象のなる該三層管７と前記管継手８の溶融対応部位の長さが同じなので略同一とすることが好ましい。
そして、前記三層管加熱体３と継手加熱体４とは、図３に示すように、両側から前記三層管７と管継手８の接続端部を夫々同時に溶融できるように、厚い板状の鏝芯２の板面両側に背合わせ状態に設ける。 Further, the depth of the circumferential groove 9 of the three-layer tube heating body 3 and the protruding lengths of the joint heating body 4 and the tubular protrusion 10 are determined by the melt-corresponding portions of the three-layer tube 7 and the pipe joint 8 to be connected. It is preferable that the lengths are substantially the same.
The three-layer tube heater 3 and the joint heater 4 are thick plate-shaped so that the connection end portions of the three-layer tube 7 and the tube joint 8 can be simultaneously melted from both sides as shown in FIG. Are provided in a back-to-back state on both sides of the plate surface of the core 2.

さらに、図５に示すように、１つの鏝芯２には、複数対の円周溝９、９ａを備えた三層管加熱体３、３ａ及び管状突起１０、１０ａを備えた継手加熱体４、４ａを背中合わせに一体的に設けることもできる。この形態では、複数の異なるサイズの鏝を交換せずに、１個の鏝で異なるサイズの前記三層管と管継手の融着作業を行うことが可能となる。
各三層管加熱体３、３ａ及び継手加熱体４、４ａの各設置位置は、前記鏝芯２の表面に一定の間隔を置いて縦方向や横方向に列設したり、等間隔に配置することが可能である。 Furthermore, as shown in FIG. 5, a single core 2 has a three-layer tube heater 3, 3a provided with a plurality of pairs of circumferential grooves 9, 9a and a joint heater 4 provided with tubular protrusions 10, 10a. 4a can be integrally provided back to back. In this embodiment, it is possible to perform the fusion work of the three-layer pipe and the pipe joint of different sizes with one ridge without exchanging a plurality of rivets of different sizes.
The installation positions of the three-layer tube heaters 3 and 3a and the joint heaters 4 and 4a are arranged at regular intervals on the surface of the core 2 in the vertical and horizontal directions, or at equal intervals. Is possible.

また、図６に示すように、鏝芯２の継手加熱体４の内部には前記管継手８の内径と等しい外径の円柱状の管内支持芯２２を形成することも可能である。この形態では、管内支持芯２２が、図３に示す管内支持管１５の代用となって、加熱中に前記管継手８に差し込まれて管内支持管１５の外周面で前記管継手８の内部が変化されるのを防ぐ。
このため、前記管継手８への管内支持管１５の装着作業の工程がなくなり、その分、作業効率を高めることが可能となる。 Further, as shown in FIG. 6, it is also possible to form a cylindrical in-tube support core 22 having an outer diameter equal to the inner diameter of the pipe joint 8 inside the joint heating body 4 of the core 2. In this embodiment, the in-pipe support core 22 is substituted for the in-pipe support pipe 15 shown in FIG. 3 and is inserted into the pipe joint 8 during heating so that the inside of the pipe joint 8 is connected to the outer peripheral surface of the in-pipe support pipe 15. Prevent changes.
For this reason, the process of attaching the in-pipe support pipe 15 to the pipe joint 8 is eliminated, and the work efficiency can be increased accordingly.

さらに、前記背中合わせの三層管加熱体３と継手加熱体４とは、図１の（イ）に示すように、各々の中心線を共通の中心線とすれば、後述の加熱装置に用いた場合、前記三層管の端部を把持する送りクランプと前記管継手の端部を把持する送りチャックの移動が、その中心線に沿って対向側で正反対に移動させて行うことができ、前記三層管と管継手の位置決めを容易且つ正確に行うことが可能となる。   Further, the back-to-back three-layer tube heating body 3 and the joint heating body 4 were used in a heating device described later if each center line is a common center line as shown in FIG. In this case, the feed clamp for gripping the end of the three-layer pipe and the feed chuck for gripping the end of the pipe joint can be moved diametrically on the opposite side along the center line. Positioning of the three-layer pipe and the pipe joint can be performed easily and accurately.

また、溶融した樹脂が前記三層管加熱体３及び継手加熱体４に付着して、前記三層管と管継手の端部が該三層管加熱体３及び継手加熱体４から容易に抜けなくなるのを防ぐため、前記三層管加熱体３の円周溝９の表面と継手加熱体４の管状突起１０の表面には、ポリテトラフルオロエチレン等のフッ素樹脂の被覆層を形成する。
ポリテトラフルオロエチレンは溶融した三層管加熱体３及び継手加熱体４の端部の金属面に樹脂がべた付くのを防止できるため溶融後の円滑な抜取りが可能となる。 Further, the melted resin adheres to the three-layer tube heating body 3 and the joint heating body 4, and the end portions of the three-layer tube and the pipe joint easily come off from the three-layer tube heating body 3 and the joint heating body 4. In order to prevent disappearance, a coating layer of a fluororesin such as polytetrafluoroethylene is formed on the surface of the circumferential groove 9 of the three-layer tube heating body 3 and the surface of the tubular protrusion 10 of the joint heating body 4.
Since polytetrafluoroethylene can prevent the resin from sticking to the metal surfaces at the ends of the melted three-layer tube heater 3 and joint heater 4, smooth extraction after melting becomes possible.

次に、上記鏝を用いた三層管と管継手の接続端部の加熱装置について説明する。
該加熱装置は、図１の（イ）に示すように、前記鏝を支持台１に固定し、該支持台１の両側に、前記鏝の管状突起１０と円周溝９とに対向して前記三層管７の端部７ａを把持して進退可能とする送りクランプ１６と、前記管継手８の端部８ａを把持して進退可能とする送りチャック１７とを備える。 Next, a heating device for the connecting end portion of the three-layer pipe and the pipe joint using the above-mentioned rod will be described.
As shown in FIG. 1A, the heating device fixes the scissors to the support base 1 and faces the tubular protrusions 10 and the circumferential grooves 9 on both sides of the support base 1. A feed clamp 16 that holds the end portion 7a of the three-layer pipe 7 and can move forward and backward, and a feed chuck 17 that holds the end portion 8a of the pipe joint 8 and can move forward and backward are provided.

前記送りクランプ１６は、把持する三層管７の向きに沿って全体を垂直又は水平方向に２分割し、前記三層管７の中間を横から入れてその両側から挟んで固定する。その際、前面に形成した三層管クランプ部１６ａで前記三層管７の側面を確実に挟み付けて、把持可能とする。
該送りクランプ１６の基部に移動台２０を設け、さらに移動台２０をガイドする送りレール１９を前記鏝に向けて設け、このレール１９に乗った送りクランプ１６を、前記鏝に向かって前後にスライドして移動できるようにする。
また、前記送りチャック１７は、その前面に設けた継手チャック部１７ａの３つ爪を狭めて前記管継手８を掴むようにチャックする。
そして該送りチャック１７側にも、その基部に移動台２０を設けるとともに該移動台２０をガイドする送りレール１９を前記鏝に向けて設け、前記送りチャック１７が該送りレール１９に乗ってスライドして前後に移動できるようにする。
前記送りクランプ１６及び送りチャック１７の移動は、人為的又は機械的に行うことが可能である。
この送りクランプ１６及び送りチャック１７の移動によって、図１の（ロ）に示すように、前記鏝に前記三層管７及び前記管継手８の端部を管状突起１０と円周溝９とに夫々差し込んで加熱でき、前記三層管７及び前記管継手８の端部の加熱終了後に、前記三層管７及び前記管継手８を前記鏝から抜き離すことが可能となる。 The feed clamp 16 is divided into two vertically or horizontally along the direction of the three-layer tube 7 to be gripped, and the middle of the three-layer tube 7 is inserted from the side and fixed from both sides. At that time, the side surface of the three-layer tube 7 is securely clamped by the three-layer tube clamp portion 16a formed on the front surface so as to be gripped.
A moving base 20 is provided at the base of the feed clamp 16, and a feed rail 19 for guiding the moving base 20 is provided toward the saddle. The feed clamp 16 on the rail 19 is slid back and forth toward the saddle. To be able to move.
Further, the feed chuck 17 chucks the pipe joint 8 by narrowing the three claws of the joint chuck portion 17a provided on the front surface thereof.
The feed chuck 17 is also provided with a moving table 20 at its base, and a feed rail 19 for guiding the moving table 20 is provided toward the flange. The feed chuck 17 slides on the feed rail 19. To move back and forth.
The feed clamp 16 and the feed chuck 17 can be moved artificially or mechanically.
By the movement of the feed clamp 16 and the feed chuck 17, as shown in FIG. 1B, the end portions of the three-layer pipe 7 and the pipe joint 8 are formed into the tubular projection 10 and the circumferential groove 9 on the flange. Each of them can be inserted and heated, and after the heating of the end portions of the three-layer pipe 7 and the pipe joint 8 is completed, the three-layer pipe 7 and the pipe joint 8 can be removed from the rod.

加熱後、前記鏝から抜き取った前記三層管７及び前記管継手８は、次に端部同士を接合する作業に移行するが、前記三層管７及び前記管継手８は前記送りクランプと送りチャックに把持させたままで、遅滞なく接合させには最適な方法である。
そのために、前記管端部加熱装置には、送りクランプと送りチャックとを接近させて、図２の（二）に示すように、前記三層管７の端部７ａを三層管端部差込溝１１に圧入し密着させるための台移動手段を設け、また、前記送りクランプと送りチャックとを接近させるのに障害となる前記鏝を、一旦、前記送りクランプ１６と送りチャック１７との間からその外側に移動可能とする鏝移動機構１８を設ける。 After the heating, the three-layer pipe 7 and the pipe joint 8 extracted from the scissors are shifted to the operation of joining the end portions to each other, but the three-layer pipe 7 and the pipe joint 8 are transferred to the feed clamp and the feed. This is the most suitable method for joining without any delay while being held by the chuck.
For this purpose, the pipe end heating device is brought close to the feed clamp and the feed chuck, and the end 7a of the three-layer pipe 7 is connected to the three-layer pipe end difference as shown in FIG. A table moving means is provided for press-fitting into the insertion groove 11 and closely contacting it, and the wrinkles that obstruct the approach between the feed clamp and the feed chuck are temporarily placed between the feed clamp 16 and the feed chuck 17. A scissors moving mechanism 18 that can move to the outside is provided.

前記移動機構１８は、前記送りクランプ１６と送りチャック１７との間からその側方へスライドさせて移動させる構造や、図２に（ハ）に示すように、側方へ回転させる構造とする。該移動機構１８によって、前記鏝全体を送りクランプと送りチャックとの間から邪魔にならない位置まで移動させることが可能となる。   The moving mechanism 18 has a structure in which the moving mechanism 18 is slid and moved to the side from between the feed clamp 16 and the feed chuck 17 or a structure that is rotated to the side as shown in FIG. The moving mechanism 18 can move the entire hook from between the feed clamp and the feed chuck to an unobstructed position.

前記台移動手段は、図１及び図２に示すように、送りレール１９と該レールに架設した送りクランプ１６の移動台２０及び送りチャック１７の移動台２１とが共用できる。
そして、その移動範囲を、図２の（ニ）に示すように、前記移動機構１８によって、邪魔にならない位置まで移動させた鏝を跨いで、送りクランプと送りチャックとが接合可能な距離にまでに前進させることで前記三層管７の端部７ａを三層管端部差込溝１１に嵌合できるようになる。
前記台移動手段は、このように送りレール１９を配して移動台２０、２１をその上に移動させるほか、移動台２０、２１を直接ロボットアームの先端に固定して電子制御して移動させることも可能である。 As shown in FIGS. 1 and 2, the table moving means can share the feed rail 19, the moving table 20 of the feed clamp 16 installed on the rail, and the moving table 21 of the feed chuck 17.
Then, as shown in FIG. 2 (d), the moving range is extended to a distance at which the feed clamp and the feed chuck can be joined across the scissors moved to the position where it does not get in the way by the moving mechanism 18. The end portion 7a of the three-layer tube 7 can be fitted into the three-layer tube end portion insertion groove 11 by moving forward.
In this way, the platform moving means arranges the feed rail 19 and moves the movable platforms 20 and 21 thereon, and also moves the movable platforms 20 and 21 directly to the tip of the robot arm and electronically controls them. It is also possible.

次に、上記鏝を用いた三層管と管継手の接続端部の加熱方法について説明する。
該加熱方法は、対象となるの樹脂被覆金属三層管７の内外両側の樹脂被覆層が厚さ３ｍｍ以上の熱溶融性ポリエチレンとする。
そして、前記鏝を用い、前記三層管７を加熱する設定時間を３〜４秒とし、且つ加熱する設定温度を２８０〜３００°Ｃとして、前記各樹脂被覆層１３、１４の金属管１２側に非溶融部分を残して表層を溶融する。
また同時に、前記管継手８の三層管端部差込溝１１の内面を加熱して、該管継手８の内側と外側に非溶融部分を残して該内面表層を溶融する。
該管継手８の材質は、前記三層管７の内外両側の樹脂被覆層と同じ熱溶融性ポリエチレンとすれば、同じ加熱条件で樹脂表層を溶融でき、前記管端部加熱装置を用いて前記三層管７と管継手８とを同時に溶融可能となるので、その後の融着を進行させる上で好ましい。 Next, a method for heating the connecting end portion of the three-layer pipe and the pipe joint using the above-mentioned rod will be described.
The heating method is such that the resin coating layers on both the inner and outer sides of the target resin-coated metal three-layer tube 7 are heat-meltable polyethylene having a thickness of 3 mm or more.
Then, the set time for heating the three-layer tube 7 is set to 3 to 4 seconds and the set temperature for heating is set to 280 to 300 ° C., and the metal coating 12 side of each of the resin coating layers 13 and 14 is used. The surface layer is melted leaving a non-melted portion.
At the same time, the inner surface of the three-layer pipe end insertion groove 11 of the pipe joint 8 is heated to melt the inner surface layer leaving unmelted portions inside and outside the pipe joint 8.
If the material of the pipe joint 8 is the same heat-meltable polyethylene as the resin coating layers on both the inner and outer sides of the three-layer pipe 7, the resin surface layer can be melted under the same heating conditions, and the pipe end heating device is used to Since the three-layer pipe 7 and the pipe joint 8 can be melted at the same time, it is preferable for the subsequent fusion to proceed.

上記加熱する温度及び時間の条件下では、前記三層管７と該管継手８の溶融部分Ｍは、図４の（イ）に示すように、樹脂被覆金属三層管７の内外両側端部の樹脂被覆層１３、１４の表層のみと、樹脂製管継手８の三層管端部差込溝１１の内面の表層のみとに形成される。
そして、その溶融部分Ｍの硬化が起こらない数秒後のうちに直ちに、図２の（二）に示すように、前記管継手８の三層管端部差込溝１１に前記三層管７の加熱端部を差し込んで両者を接合させる。 Under the conditions of the heating temperature and time, the melted portion M of the three-layer pipe 7 and the pipe joint 8 is formed at both end portions on both the inner and outer sides of the resin-coated metal three-layer pipe 7, as shown in FIG. Are formed only on the surface layer of the resin coating layers 13 and 14 and only on the surface layer of the inner surface of the three-layer tube end insertion groove 11 of the resin pipe joint 8.
Then, immediately after a few seconds when the molten portion M does not harden, the three-layer pipe 7 is inserted into the three-layer pipe end insertion groove 11 of the pipe joint 8 as shown in FIG. Insert the heating end and join them together.

また、前記管継手８には、図４に示すように、該三層管７と同内径で、前記管差込溝１１の深さと同程度の長さを有する薄手の金属製薄肉管内支持管１５を用意し、加熱させた前記管継手８の開口端部８ａに予め装着しておくと、加熱で前記管継手８の内径側に生じる可能性のある変形やダレを防ぐことが可能となる。
また、該金属製薄肉管内支持管１５を用ない場合には、鏝芯２の継手加熱体４の内部に円柱状の管内支持芯２２を形成した鏝を用いれば、加熱で前記管継手８の内径側に生じる可能性のある変形やダレを防ぐことが可能となる。 Further, as shown in FIG. 4, the pipe joint 8 has a thin metal thin-wall support pipe having the same inner diameter as that of the three-layer pipe 7 and a length comparable to the depth of the pipe insertion groove 11. 15 is prepared and attached in advance to the heated open end 8a of the pipe joint 8, it is possible to prevent deformation and sagging that may occur on the inner diameter side of the pipe joint 8 due to heating. .
In addition, when the metal thin-wall support pipe 15 is not used, if a rod having a cylindrical tube support core 22 formed inside the joint heating body 4 of the rod core 2 is used, the pipe joint 8 is heated by heating. It is possible to prevent deformation and sagging that may occur on the inner diameter side.

以上によって、前記三層管７の端部が前記管継手８の三層管端部差込溝１１に差し込まれ、その接合面が融着一体的された強固な接続が実現される。   As described above, the end portion of the three-layer pipe 7 is inserted into the three-layer pipe end portion insertion groove 11 of the pipe joint 8, and a firm connection is realized in which the joint surfaces are fused and integrated.

本発明は、スプリンクラー用給水管の他に、水道管やガス管等の各種の液体や気体を送るために使用される樹脂被覆金属三層管と、その管を接続する管継手との融着による接合に利用することが可能である。   In addition to the water supply pipe for sprinklers, the present invention is a fusion of a resin-coated metal three-layer pipe used for feeding various liquids and gases such as water pipes and gas pipes, and a pipe joint connecting the pipes. It can be used for joining by.

１ 支持台
２ 鏝芯
２ａ 鏝芯の基部
３ 三層管加熱体
３ａ 三層管加熱体
４ 継手加熱体
４ａ 継手加熱体
５ 電気ヒータ
６ 電気コード
７ 三層管
７ａ 三層管の端部
８ 管継手
８ａ 管継手の端部
９ 円周溝
９ａ 円周溝
１０ 管状突起
１０ａ 管状突起
１１ 三層管端部差込溝
１２ 金属管
１３ 樹脂被覆層
１４ 樹脂被覆層
１５ 肉薄管内支持管
１６ 送りクランプ
１６ａ 三層管クランプ部
１７ 送りチャック
１７ａ 継手チャック部
１８ 鏝転倒機構
１９ 送りレール
２０ 移動台
２１ 移動台
２２ 管内支持芯
Ｍ 溶融部分 DESCRIPTION OF SYMBOLS 1 Support stand 2 Core 2a Core base 3 Three-layer pipe heating body 3a Three-layer pipe heating body 4 Joint heating body 4a Joint heating body 5 Electric heater 6 Electric cord 7 Three-layer pipe 7a End part of three-layer pipe 8 Pipe Joint 8a Pipe joint end 9 Circumferential groove 9a Circumferential groove 10 Tubular projection 10a Tubular projection 11 Three-layer tube end insertion groove 12 Metal tube 13 Resin coating layer 14 Resin coating layer 15 Thin tube support tube 16 Feed clamp 16a Three-layer tube clamp part 17 Feed chuck 17a Joint chuck part 18 倒 Tipping mechanism 19 Feed rail 20 Moving base 21 Moving base 22 In-pipe support core M Melting part

Claims (9)

樹脂被覆金属三層管の端部と、該三層管の端部の内外両側の樹脂被覆層に当接する三層管端部差込溝を備えた樹脂製管継手の端部との接合面を融着するための三層管と管継手の接続端部加熱用鏝であって、
ａ）鏝芯に背面を固定し、前面に前記樹脂被覆金属三層管の端部に差込可能に対応する円周溝を形成した三層管加熱体と、
ｂ）前記鏝芯に背面を固定し、前面に前記管継手の三層管端部差込溝に差込可能に対応する管状突起を備えた継手加熱体と、
ｃ）鏝芯の基部に固定した電気ヒータと、そのヒータに送電する電気コードと、
を備えて成ることを特徴とする三層管と管継手の接続端部加熱用鏝。 Joint surface between the end portion of the resin-coated metal three-layer tube and the end portion of the resin-made pipe joint provided with the three-layer tube end insertion groove contacting the resin coating layer on both the inside and outside of the end portion of the three-layer tube A connecting end heating rod for a three-layer pipe and a pipe joint for fusing
a) a three-layer tube heating body in which a back surface is fixed to the core and a circumferential groove corresponding to the front surface of the resin-coated metal three-layer tube is formed so as to be insertable;
b) A joint heating body having a tubular projection corresponding to a front face fixed to the core and capable of being inserted into the three-layer pipe end insertion groove of the pipe joint on the front face;
c) an electric heater fixed to the base of the core, an electric cord for transmitting power to the heater,
A heating rod for connecting end of a three-layer pipe and a pipe joint, characterized by comprising: 請求項１に記載の三層管と管継手の接続端部加熱用金鏝において、
鏝芯の継手加熱体の内部に前記管継手の内径と等しい外径の円柱状の管内支持芯を前記管継手の三層管端部差込溝の深さと同程度の高さに形成したことを特徴とする三層管と管継手の接続端部加熱用金鏝。 In the three-layer pipe according to claim 1 and a metal bar for heating the connection end of the pipe joint,
A cylindrical in-pipe support core having an outer diameter equal to the inner diameter of the pipe joint is formed at the same height as the depth of the three-layer pipe end insertion groove of the pipe joint inside the joint heating body of the core. A metal rod for heating the connection end of a three-layer pipe and a pipe joint. 請求項１又は２に記載の三層管と管継手の接続端部加熱用金鏝において、
鏝芯に三層管加熱体と継手加熱体とを背合わせに設けたことを特徴とする三層管と管継手の接続端部加熱用金鏝。 In the metal shell for connecting end portion heating of the three-layer pipe and the pipe joint according to claim 1 or 2,
A three-layer pipe and pipe joint heating end metal bar characterized in that a three-layer pipe heater and a joint heater are provided back-to-back on the core. 請求項３に記載の三層管と管継手の接続端部加熱用金鏝において、
鏝芯に複数対の三層管加熱体及び継手加熱体を設けたことを特徴とする三層管と管継手の接続端部加熱用金鏝。 In the metal shell for connecting end portion heating of the three-layer pipe and the pipe joint according to claim 3,
A metal rod for heating a connecting end portion of a three-layer tube and a pipe joint, wherein a plurality of pairs of three-layer tube heaters and joint heaters are provided on the core. 請求項３又は４に記載の三層管と管継手の接続端部加熱金鏝において、
背中合わせの三層管加熱体と継手加熱体とを、各々の中心線を共通の中心線となるように配設したことを特徴とする三層管と管継手の接続端部加熱金鏝。 In the connection end portion heating metal bar of the three-layer pipe and the pipe joint according to claim 3 or 4,
A three-layer pipe and pipe joint connecting end heating bar characterized in that back-to-back three-layer pipe heating bodies and joint heating bodies are arranged such that their center lines are the common center line. 請求項１から５のうちいずれかに記載の三層管と管継手の接続端部加熱用鏝において、
三層管加熱体の円周溝及び継手加熱体の管状突起の各表面に、ポリテトラフルオロエチレンの被覆層を形成したことを特徴とする三層管と管継手の接続端部加熱用鏝。 In the scissors for heating the connection end of the three-layer pipe and pipe joint according to any one of claims 1 to 5,
A connecting end heating rod between a three-layer pipe and a pipe joint, wherein a coating layer of polytetrafluoroethylene is formed on each surface of the circumferential groove of the three-layer pipe heating body and the tubular protrusion of the joint heating body. 請求項１から６のうちいずれかに記載の三層管と管継手の接続端部加熱用鏝を用いた三層管と管継手の接続端部の加熱装置であって、
ａ）前記三層管と管継手の接続端部加熱用鏝を支持台に固定し、
ｂ）前記三層管と管継手の接続端部加熱用鏝の三層管加熱体の円周溝に対向させて前記三層管の端部を把持する送りクランプを設けるとともに該送りクランプの基部には前記円周溝に向けて進退可能とするクランプ移動台を設け、
ｃ）前記三層管と管継手の接続端部加熱用鏝の継手加熱体の管状突起に対向させて前記管継手の端部を把持する送りチャックを設けるとともに該送りチャックの基部には前記管状突起に向けて進退可能とするチャック移動台を設け、
たことを特徴とする三層管と管継手の接続端部の加熱装置。 A heating device for a connection end portion of a three-layer pipe and a pipe joint using the three-layer pipe and pipe joint connection heating rod according to any one of claims 1 to 6,
a) Fix the connection end heating rod of the three-layer pipe and the pipe joint to the support base,
b) A feed clamp for gripping the end of the three-layer pipe facing the circumferential groove of the three-layer pipe heating body of the flange for heating the connection end of the three-layer pipe and the pipe joint, and a base of the feed clamp Is provided with a clamp moving base that can advance and retract toward the circumferential groove,
c) A feed chuck for gripping the end of the pipe joint facing the tubular protrusion of the joint heating body of the flange for heating the connecting end of the three-layer pipe and the pipe joint is provided, and the tubular portion is provided at the base of the feed chuck A chuck moving base that can move forward and backward toward the protrusion is provided.
A heating device for a connecting end of a three-layer pipe and a pipe joint, characterized in that 請求項７に記載の三層管と管継手の接続端部の加熱装置であって、
ａ）前記支持台を送りクランプと送りチャックから離れるように移動可能とする鏝移動機構を設け、
ｂ）前記送りクランプ及び／又は前記送りチャックの移動台を、把持した前記三層管の端部と前記管継手の端部とが接合可能な位置に移動可能とする台移動手段を設け、
たことを特徴とする三層管と管継手の接続端部の加熱装置。 It is a heating device of the connection end part of the three-layer pipe and pipe joint according to claim 7,
a) provided with a scissors moving mechanism that enables the support base to move away from the feed clamp and the feed chuck;
b) providing a table moving means for enabling the moving clamp and / or the moving chuck moving table to move to a position where the gripped end of the three-layer pipe and the end of the pipe joint can be joined;
A heating device for a connecting end of a three-layer pipe and a pipe joint, characterized in that 請求項１から６のうちいずれかに記載の三層管と管継手の接続端部加熱用鏝を用いた三層管と管継手の接続端部の加熱方法であって、
内外両側の樹脂被覆層の厚さが３ｍｍ以上の熱溶融性ポリエチレン層を有する樹脂被覆金属三層管を対象とし、
ａ）三層管と管継手の接続端部加熱用鏝で前記三層管を加熱する時間を３〜４秒に設定し、且つ加熱する温度を２８０〜３００°Ｃに設定して前記各樹脂被覆層の金属管側に非溶融部分を残して表層を溶融し、
ｂ）同時に、三層管と管継手の接続端部加熱用鏝で脂製管継手の三層管端部差込溝の内面を加熱して管の内側と外側に非溶融部分を残して該内面表層を溶融し、
ｃ）直ちに前記管継手の三層管端部差込溝に前記三層管の加熱端部を差し込んで両者を融着することを特徴とする三層管と管継手の接続端部の加熱方法。 A method for heating the connection end of the three-layer pipe and the pipe joint using the scissors for heating the connection end of the three-layer pipe and the pipe joint according to any one of claims 1 to 6,
For a resin-coated metal three-layer tube having a heat-meltable polyethylene layer with a thickness of 3 mm or more on both the inner and outer resin coating layers,
a) The time for heating the three-layer pipe with a scissors for heating the connection end of the three-layer pipe and the pipe joint is set to 3 to 4 seconds, and the heating temperature is set to 280 to 300 ° C. Melt the surface layer leaving a non-melted part on the metal tube side of the coating layer,
b) At the same time, the inner surface of the three-layer pipe end insertion groove of the fat pipe joint is heated with a scissors for heating the connection end of the three-layer pipe and the pipe joint to leave unmelted portions on the inside and outside of the pipe. Melting the inner surface layer,
c) Immediately inserting the heating end of the three-layer pipe into the three-layer pipe end insertion groove of the pipe joint and fusing them together, and heating the connection end of the three-layer pipe and the pipe joint .
JP2011165965A 2011-07-28 2011-07-28 Iron for heating connection end of three-layer pipe and pipe joint, heating device that uses the iron and heating method Pending JP2013028081A (en)

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CN108150751A (en) * 2017-11-22 2018-06-12 温州伟国建设有限公司 Municipal blow-off line
WO2022054939A1 (en) * 2020-09-14 2022-03-17 旭有機材株式会社 Plumbing connection device

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WO2022054939A1 (en) * 2020-09-14 2022-03-17 旭有機材株式会社 Plumbing connection device

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