JPH0560286A - Connecting method of resin pipe - Google Patents

Connecting method of resin pipe

Info

Publication number
JPH0560286A
JPH0560286A JP3220104A JP22010491A JPH0560286A JP H0560286 A JPH0560286 A JP H0560286A JP 3220104 A JP3220104 A JP 3220104A JP 22010491 A JP22010491 A JP 22010491A JP H0560286 A JPH0560286 A JP H0560286A
Authority
JP
Japan
Prior art keywords
pipe joint
heater
heating element
resin
diameter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP3220104A
Other languages
Japanese (ja)
Inventor
Tsuneo Aoi
恒夫 青井
Satoru Okada
哲 岡田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Furukawa Electric Co Ltd
Zeon Corp
Original Assignee
Furukawa Electric Co Ltd
Nippon Zeon Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Furukawa Electric Co Ltd, Nippon Zeon Co Ltd filed Critical Furukawa Electric Co Ltd
Priority to JP3220104A priority Critical patent/JPH0560286A/en
Publication of JPH0560286A publication Critical patent/JPH0560286A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • 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
    • B29C65/66—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by liberation of internal stresses, e.g. shrinking of one of the parts to be joined
    • B29C65/68—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by liberation of internal stresses, e.g. shrinking of one of the parts to be joined using auxiliary shrinkable elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5224—Joining tubular articles for forming fork-shaped connections, e.g. for making Y-shaped pieces
    • B29C66/52241—Joining tubular articles for forming fork-shaped connections, e.g. for making Y-shaped pieces with two right angles, e.g. for making T-shaped pieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8145—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81471—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps being a wrap-around tape or band
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8182—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the thermal insulating constructional aspects
    • B29C66/81821—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the thermal insulating constructional aspects of the welding jaws
    • 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
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0049—Heat shrinkable
    • 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
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid

Abstract

PURPOSE:To allow the constantly uniform heating of a fitting and improve, the reliability of connecting state by winding a flexible heating element on the outside of a resin fitting to be contracted in diameter by heating. CONSTITUTION:The pipe holes of resin pipes 1 and 2 to be connected to each other are inserted in a resin fitting 3 which is contracted in diameter by heating, and a flexible heating element 8 consisting of an elastic heat insulator 6 and a heater 7 integrated into the heat insulator is wound on the outside of the fitting 3 to fasten the fitting 3. A rated current is supplied to the heater 7 of the flexible heating element 8 from a rated current device 10 to heat the fitting 3.

Description

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

【０００１】[0001]

【産業上の利用分野】本発明は樹脂管の接続方法に関
し、更に詳しくは、加熱によって縮径可能な樹脂製の管
継手を用いる樹脂管の接続方法において、管継手を終始
一様に加熱することができるので安定した接続を可能に
する接続方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin pipe connecting method, and more particularly, in a resin pipe connecting method using a resin pipe joint whose diameter can be reduced by heating, the pipe joint is heated uniformly from beginning to end. The present invention relates to a connection method that enables stable connection.

【０００２】[0002]

【従来の技術】形状記憶機能を備えた樹脂製の管継手を
用いて樹脂管を接続する方法としては、従来から、次の
ような方法が知られている。すなわち、まず、図３で示
したように、加熱によってその内径が接続すべき樹脂管
１，２の外径と略同じかまたは若干小径となるように縮
径する樹脂製の円筒形の管継手３を用意し、この管継手
３の中に樹脂管１，２の各管口１ａ，２ａを突き合わせ
て配置したのち、管継手３を外部から加熱して管継手３
を縮径し、図４で示したように、縮径後の管継手３’の
内周壁で樹脂管１，２の外周壁を緊締して両者を接続す
る。2. Description of the Related Art As a method for connecting resin pipes using a resin pipe joint having a shape memory function, the following methods have been conventionally known. That is, first, as shown in FIG. 3, a resin cylindrical pipe joint whose inner diameter is reduced by heating so that its inner diameter is substantially the same as or slightly smaller than the outer diameter of the resin pipes 1 and 2 to be connected. 3 is prepared, and the pipe openings 1a and 2a of the resin pipes 1 and 2 are placed in the pipe joint 3 butted to each other, and then the pipe joint 3 is heated from the outside to form the pipe joint 3
As shown in FIG. 4, the outer peripheral walls of the resin pipes 1 and 2 are tightened by the inner peripheral wall of the pipe joint 3 ′ after the diameter reduction to connect them.

【０００３】このときの管継手の加熱方法としては、例
えば、図５で示したように、金属製のバンドヒータ４を
管継手３の外周に巻回してこれに通電する方法がある。
しかしながら、この方法の場合には、加熱によって管継
手３が縮径していっても、バンドヒータ４は硬質の金属
製であるため管継手３の縮径に追随して自らも縮径する
ことがなく、図６で示したように、管継手３とバンドヒ
ータ４との間に空隙５が成長していき、管継手３の円周
方向で一様な加熱を行なえないことがある。As a method of heating the pipe joint at this time, for example, as shown in FIG. 5, there is a method of winding a metal band heater 4 around the outer periphery of the pipe joint 3 and energizing it.
However, in the case of this method, even if the pipe joint 3 is reduced in diameter by heating, since the band heater 4 is made of a hard metal, the diameter of the pipe joint 3 is also reduced by itself. In some cases, as shown in FIG. 6, the gap 5 grows between the pipe joint 3 and the band heater 4, and uniform heating cannot be performed in the circumferential direction of the pipe joint 3.

【０００４】そのため、硬質な金属製のバンドヒータに
代えて、図７で示したように、弾性を有する断熱材のシ
ート６の片面に導電性を有する繊維で編んだヒータ７を
取り付けて成るシート状の可撓性発熱体８を用いる方法
が考えられる。すなわち、この可撓性発熱体を管継手の
外周に巻回して緊締し、ヒータ端子７ａ，７ｂから通電
する方法である。Therefore, in place of the band heater made of a hard metal, as shown in FIG. 7, a sheet 7 formed by attaching a heater 7 knitted with a conductive fiber to one surface of a sheet 6 of a heat insulating material having elasticity. A method of using a flexible heating element 8 having a shape of a circle may be considered. That is, this flexible heating element is wound around the outer circumference of the pipe joint, tightened, and energized from the heater terminals 7a and 7b.

【０００５】この方法によれば、シート６は弾性を有し
ているので、加熱に伴って管継手が縮径してもその縮径
運動に可撓性発熱体８は追随することができ、その結
果、管継手との間に間隙は成長せず、管継手への一様な
加熱は可能になる。しかしながら、可撓性発熱体８の上
記追随運動の過程で、ヒータ７が相互に短絡してしまう
という事態が起こり得る。According to this method, since the sheet 6 has elasticity, even if the diameter of the pipe joint is reduced due to heating, the flexible heating element 8 can follow the diameter reduction movement. As a result, no gap grows between the pipe joint and uniform heating of the pipe joint is possible. However, in the process of the following movement of the flexible heating element 8, the heaters 7 may short-circuit with each other.

【０００６】このような事態が起こると、発熱体全体と
して温度上昇して総抵抗値が変動してしまう。そのた
め、終始一様な管継手への加熱が求められるような場合
には、上記事態が発生するたびに、その都度、通電時の
印加電圧を調整することが必要となって接続作業が煩雑
になると同時に、過大電流の流れる虞れもあって作業上
の安全性の点でも不都合である。When such a situation occurs, the temperature of the entire heating element rises and the total resistance value fluctuates. Therefore, if uniform heating of the pipe joint is required from beginning to end, it is necessary to adjust the applied voltage each time the above situation occurs, and the connection work becomes complicated. At the same time, there is a risk that an excessive current may flow, which is also inconvenient in terms of work safety.

【０００７】また、上記した管継手への通電加熱による
接続作業の場合は、管継手を所定温度に達するまで通電
し続けることが必要である。現状では、電流が２５Ａの
ときには約１０分程度通電加熱することができる。すな
わち、１個所の接続に要する時間は、通常の金属製のメ
カニカル継手を用いる場合に比べて可成り長くなる。そ
のため、施工時における能率向上のためには、通常、数
個所の接続を同時に行なうという作業態様が採られてい
る。Further, in the case of the connection work by heating the pipe joint by energization and heating, it is necessary to continue to energize the pipe joint until a predetermined temperature is reached. At present, when the current is 25 A, it can be energized and heated for about 10 minutes. That is, the time required to connect at one location is considerably longer than that in the case where an ordinary mechanical joint made of metal is used. Therefore, in order to improve the efficiency at the time of construction, a work mode in which several places are connected at the same time is usually adopted.

【０００８】しかしながら、各種管継手の形状、例えば
ソケット、エルボ、チーズなどに適合した発熱体を品揃
えした場合、それら発熱体は大きさや形状がそれぞれ異
なってくるため、全体として容量の統一ができず、結局
は、各発熱体の容量に合わせて電圧を選定しなければな
らなくなり、複数個の電源を用意することが必要になる
うえ、作業時にはそれぞれの発熱体への電圧調整を行な
わなければならず、その作業は極めて煩雑になる。However, when a variety of heating elements suitable for the shapes of various pipe joints, such as sockets, elbows, cheeses, etc. are prepared, the heating elements have different sizes and shapes, so that the capacities can be unified as a whole. In the end, the voltage must be selected according to the capacity of each heating element, and it is necessary to prepare a plurality of power supplies, and the voltage for each heating element must be adjusted during work. However, the work becomes extremely complicated.

【０００９】[0009]

【発明が解決しようとする課題】本発明は上記した硬質
のバンドヒータを用いた接続方法における上記問題を解
決し、管継手に対して終始一様な加熱を行なうことがで
き、また複数の接続個所に対しても１つの電源を用いて
接続作業を行なうことができる樹脂管の接続方法の提供
を目的とする。DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems in the connection method using the above-mentioned hard band heater, and can uniformly heat the pipe joint from beginning to end. It is an object of the present invention to provide a resin pipe connecting method capable of performing connection work using a single power source even at a location.

【００１０】[0010]

【課題を解決するための手段】上記した目的を達成する
ために、本発明においては、加熱されて縮径する樹脂製
管継手の中に接続すべき樹脂管の各管口を挿入・配置
し、弾性を有する断熱材と該断熱材に組込まれたヒータ
とから成る可撓性発熱体を前記管継手の外側に巻回して
前記管継手を緊締し、ついで、前記可撓性発熱体の前記
ヒータに定電流制御装置から定電流を供給して前記管継
手を加熱することを特徴とする樹脂管の接続方法が提供
される。In order to achieve the above-mentioned object, in the present invention, each pipe port of a resin pipe to be connected is inserted and arranged in a resin pipe joint which is heated and reduced in diameter. A flexible heating element comprising a heat insulating material having elasticity and a heater incorporated in the heat insulating material is wound around the outside of the pipe joint to tighten the pipe joint, and then the flexible heating element A method for connecting resin pipes is provided, wherein a constant current is supplied to a heater from a constant current controller to heat the pipe joint.

【００１１】[0011]

【作用】定電流制御装置からは常に一定値の電流が発熱
体に供給されるので、ヒータの短絡や発熱体それ自体の
温度上昇によって発熱体の総抵抗値が変動したとして
も、発熱体のヒータの単位長さ当りの発熱量は一定にコ
ントロールされる。そのため、管継手は終始一様に加熱
される。またヒータの短絡による過大電流が流れること
もないので安全である。Since a constant current is constantly supplied from the constant current controller to the heating element, even if the total resistance value of the heating element fluctuates due to a short circuit of the heater or a temperature rise of the heating element itself, The heat generation amount per unit length of the heater is controlled to be constant. Therefore, the pipe joint is heated uniformly throughout. Further, it is safe because an excessive current does not flow due to the short circuit of the heater.

【００１２】更には、同種抵抗体を用いたヒータであれ
ば、形状や大きさの違いによってヒータの容量が変わっ
たとしても、発熱量を統一することができるので、形状
や大きさの異なる複数の発熱体を複数の接続個所に配置
しても、それを１度に１つの電源で動作することがで
き、接続作業の能率向上と同時に、電源の種類を選択す
る煩雑さを解消することができるようになる。Further, in the case of the heater using the same type of resistor, even if the heater capacity changes due to the difference in shape and size, the calorific value can be unified, so that a plurality of heaters having different shapes and sizes can be used. Even if the heating element is placed at a plurality of connection points, it can be operated by one power source at a time, and the efficiency of connection work can be improved, and the complexity of selecting the type of power source can be eliminated. become able to.

【００１３】[0013]

【発明の実施例】図１で示したように、内径３6.４mm、
長さ７０mmの樹脂製の管継手３の中に、外径３4.８mmの
ポリエチレン管１，２を互いの管口を突き合わせた状態
で配置した。この管継手３は、１８０℃に加熱されると
内径が３6.４mmから３4.８mmに縮径する形状記憶機能を
有している。BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIG. 1, an inner diameter of 36.4 mm,
Polyethylene pipes 1 and 2 having an outer diameter of 34.8 mm were placed in a resin pipe joint 3 having a length of 70 mm with their pipe openings abutting each other. The pipe joint 3 has a shape memory function of reducing the inner diameter from 36.4 mm to 34.8 mm when heated to 180 ° C.

【００１４】ガラス繊維のマット（断熱材）６の片面に
導電性繊維のヒータ７（総抵抗１６Ω）が取り付けら
れ、両端の表・裏面に係着テープ９ａ，９ｂが取り付け
られている可撓性発熱体８を、この管継手３の外周に、
そのヒータ７が管継手３の外周面と圧接するように巻回
し、その圧接状態を係着テープ９ａ，９ｂを噛み合わせ
ることにより保持した。A conductive fiber heater 7 (total resistance 16Ω) is attached to one surface of a glass fiber mat (heat insulating material) 6, and fastening tapes 9a and 9b are attached to the front and back surfaces of both ends. The heating element 8 is attached to the outer circumference of the pipe joint 3,
The heater 7 was wound so as to come into pressure contact with the outer peripheral surface of the pipe joint 3, and the pressure contact state was held by engaging the fastening tapes 9a and 9b.

【００１５】ついで、ヒータ端子７ａ，７ｂを定電流制
御装置１０に接続し、装置の通電量を1.５Ａにセットし
た。ヒータ７が発熱して管継手３は加熱され、縮径しは
じめた。この縮径の過程で、ヒータ７はマット６の弾性
によって常時管継手３の外周面と接触し続けた。１０分
後、管継手３は、円周方向に均一に縮径して、ポリエチ
レン管１，２が接続された。この過程で、電流値は常に
1.５Ａに維持された。Next, the heater terminals 7a and 7b were connected to the constant current control device 10, and the energization amount of the device was set to 1.5A. The heater 7 generates heat and the pipe joint 3 is heated, and the diameter starts to be reduced. In the process of this diameter reduction, the heater 7 was constantly in contact with the outer peripheral surface of the pipe joint 3 due to the elasticity of the mat 6. After 10 minutes, the pipe joint 3 was uniformly reduced in diameter in the circumferential direction, and the polyethylene pipes 1 and 2 were connected. During this process, the current value is always
It was maintained at 1.5A.

【００１６】図２は他の実施例を示す概略図である。図
において、可撓性発熱体Ａ1 ，Ａ2 はいずれも総抵抗が
１６Ωの同一ヒータを用いたものであり、可撓性発熱体
Ｂ1 ，Ｂ2 ，Ｂ3 はいずれも総抵抗が８Ωの同一ヒータ
を用いたものである。そして、これらの各可撓性発熱体
は、定電流制御装置１０からＡ1 →Ｂ1 →Ｂ2 →Ｂ3 →
Ａ2 と直列に接続されている。FIG. 2 is a schematic view showing another embodiment. In the figure, the flexible heating elements A 1 and A 2 both use the same heater having a total resistance of 16Ω, and the flexible heating elements B 1 , B 2 and B 3 all have a total resistance of 8Ω. The same heater is used. Then, each of these flexible heating elements is transferred from the constant current control device 10 to A 1 → B 1 → B 2 → B 3 →
It is connected in series with A 2 .

【００１７】定電流制御装置１０を1.５Ａにセットする
と、各接続部においては、それぞれ、発熱量が統一され
る。図２の実施例のように、複数の発熱体を１つの定電
流制御装置に接続して定電流を供給する場合には、それ
らの発熱体は同種の抵抗体を使用し、継手のサイズに応
じて発熱量の異なるものを使用することが望ましい。When the constant current control device 10 is set to 1.5 A, the amount of heat generated is uniform at each connection. When a plurality of heating elements are connected to one constant current control device to supply a constant current as in the embodiment of FIG. 2, those heating elements use the same type of resistors, and the size of the joint varies. Therefore, it is desirable to use those having different heating values.

【００１８】[0018]

【発明の効果】以上の説明で明らかなように、本発明の
樹脂管の接続方法は、加熱されて縮径する樹脂製管継手
の中に接続すべき樹脂管の各管口を挿入・配置し、弾性
を有する断熱材と該断熱材に組込まれたヒータとから成
る可撓性発熱体を前記管継手の外側に巻回して前記管継
手を緊締し、ついで、前記可撓性発熱体の前記ヒータに
定電流制御装置から定電流を供給して前記管継手を加熱
することを特徴とするので、管継手が縮径しても可撓性
発熱体はそれに追随することができ、終始一様な管継手
への加熱を行なうことができる。そのため、接続状態の
信頼性は高くなる。また、可撓性発熱体におけるヒータ
の短絡や温度上昇による総抵抗の変動が起こっても、定
電流制御装置からは常に一定値の電流が供給されて、ヒ
ータの単位長さ当りの発熱量は変わることがないので、
終始一様な加熱が可能になる。As is apparent from the above description, the resin pipe connecting method according to the present invention is such that the respective pipe openings of the resin pipe to be connected are inserted and arranged in the resin pipe joint which is heated and reduced in diameter. Then, a flexible heating element consisting of a heat insulating material having elasticity and a heater incorporated in the heat insulating material is wound around the outside of the pipe joint to tighten the pipe joint, and then the flexible heating element Since a constant current is supplied to the heater from the constant current control device to heat the pipe joint, even if the pipe joint has a reduced diameter, the flexible heating element can follow it, and the whole time can be kept constant. It is possible to heat such a pipe joint. Therefore, the reliability of the connection state is high. Further, even if the total resistance of the flexible heating element fluctuates due to a short circuit of the heater or a temperature rise, the constant current control device always supplies a constant current, and the amount of heat generated per unit length of the heater is It won't change, so
Uniform heating is possible from beginning to end.

【００１９】更には、１つの電源で、１度に、複数個所
を接続することができ、従来に比べて大幅にその作業能
率の向上を図ることができる。Furthermore, one power source can be connected to a plurality of places at one time, and the working efficiency can be greatly improved as compared with the prior art.

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

【図１】本発明方法を説明するための概略斜視図であ
る。FIG. 1 is a schematic perspective view for explaining a method of the present invention.

【図２】本発明方法で複数個所を接続する状態を示す概
略図である。FIG. 2 is a schematic view showing a state in which a plurality of points are connected by the method of the present invention.

【図３】管継手の中で樹脂管を突き合わせた状態を示す
断面図である。FIG. 3 is a cross-sectional view showing a state in which resin pipes are butted in a pipe joint.

【図４】管継手が縮径した状態を示す断面図である。FIG. 4 is a cross-sectional view showing a state in which the pipe joint has a reduced diameter.

【図５】管継手の外周に金属製のバンドヒータ４を巻回
した状態を示す断面図である。FIG. 5 is a cross-sectional view showing a state in which a metal band heater 4 is wound around the outer circumference of the pipe joint.

【図６】図５において、管継手が縮径した状態を示す断
面図である。FIG. 6 is a cross-sectional view showing a state in which the pipe joint has a reduced diameter in FIG.

【図７】可撓性発熱体の１例を示す斜視図である。FIG. 7 is a perspective view showing an example of a flexible heating element.

【符号の説明】[Explanation of symbols]

１ 樹脂管 １ａ 樹脂管１の管口 ２ 樹脂管 ２ａ 樹脂管２の管口 ３ 管継手 ４ 金属製のバンドヒータ ５ 空隙 ６ 断熱材 ７ ヒータ ７ａ，７ｂ ヒータ７の端子 ８ 可撓性発熱体 ９ａ，９ｂ 係着テープ １０ 定電流制御装置 Ａ1 ，Ａ2 ，Ｂ1 ，Ｂ2 ，Ｂ3 可撓性発熱体DESCRIPTION OF SYMBOLS 1 Resin pipe 1a Resin pipe 1 pipe port 2 Resin pipe 2a Resin pipe 2 pipe port 3 Pipe joint 4 Metal band heater 5 Air gap 6 Heat insulating material 7 Heaters 7a, 7b Heater terminal 8 Flexible heating element 9a , 9b Attachment tape 10 Constant current control device A 1 , A 2 , B 1 , B 2 , B 3 Flexible heating element

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 加熱されて縮径する樹脂製管継手の中に
接続すべき樹脂管の各管口を挿入・配置し、弾性を有す
る断熱材と該断熱材に組込まれたヒータとから成る可撓
性発熱体を前記管継手の外側に巻回して前記管継手を緊
締し、ついで、前記可撓性発熱体の前記ヒータに定電流
制御装置から定電流を供給して前記管継手を加熱するこ
とを特徴とする樹脂管の接続方法。1. A heat-insulating material having elasticity, and a heater incorporated in the heat-insulating material, in which each tube opening of a resin tube to be connected is inserted and arranged in a resin-made pipe joint that is heated and reduced in diameter. A flexible heating element is wound around the outside of the pipe joint to tighten the pipe joint, and then a constant current is supplied to the heater of the flexible heating element from a constant current controller to heat the pipe joint. A method for connecting a resin pipe, characterized by:
JP3220104A 1991-08-30 1991-08-30 Connecting method of resin pipe Pending JPH0560286A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3220104A JPH0560286A (en) 1991-08-30 1991-08-30 Connecting method of resin pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3220104A JPH0560286A (en) 1991-08-30 1991-08-30 Connecting method of resin pipe

Publications (1)

Publication Number Publication Date
JPH0560286A true JPH0560286A (en) 1993-03-09

Family

ID=16745978

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3220104A Pending JPH0560286A (en) 1991-08-30 1991-08-30 Connecting method of resin pipe

Country Status (1)

Country Link
JP (1) JPH0560286A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001171007A (en) * 1999-12-20 2001-06-26 Solar Giken:Kk Heat-fusion joining method for small-bore pipe of thermoplastic resin
WO2008002022A1 (en) * 2006-06-29 2008-01-03 Aon Instrument Co., Ltd. Insulating heater jacket
EP2987624A1 (en) * 2014-08-21 2016-02-24 Frans Nooren Afdichtingssystemen B.V. Heating blanket
JP2017037817A (en) * 2015-08-13 2017-02-16 富士通株式会社 Microwave heating device
JP2017037792A (en) * 2015-08-11 2017-02-16 富士通株式会社 Microwave heating device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001171007A (en) * 1999-12-20 2001-06-26 Solar Giken:Kk Heat-fusion joining method for small-bore pipe of thermoplastic resin
WO2008002022A1 (en) * 2006-06-29 2008-01-03 Aon Instrument Co., Ltd. Insulating heater jacket
EP2987624A1 (en) * 2014-08-21 2016-02-24 Frans Nooren Afdichtingssystemen B.V. Heating blanket
JP2017037792A (en) * 2015-08-11 2017-02-16 富士通株式会社 Microwave heating device
JP2017037817A (en) * 2015-08-13 2017-02-16 富士通株式会社 Microwave heating device

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