JPH0788041B2 - How to connect the plastic pipe - Google Patents

How to connect the plastic pipe

Info

Publication number
JPH0788041B2
JPH0788041B2 JP62094627A JP9462787A JPH0788041B2 JP H0788041 B2 JPH0788041 B2 JP H0788041B2 JP 62094627 A JP62094627 A JP 62094627A JP 9462787 A JP9462787 A JP 9462787A JP H0788041 B2 JPH0788041 B2 JP H0788041B2
Authority
JP
Japan
Prior art keywords
pipe
metal fittings
outside
supporting metal
tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP62094627A
Other languages
Japanese (ja)
Other versions
JPS63260429A (en
Inventor
大三郎 塚本
Original Assignee
大三郎 塚本
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 大三郎 塚本 filed Critical 大三郎 塚本
Priority to JP62094627A priority Critical patent/JPH0788041B2/en
Publication of JPS63260429A publication Critical patent/JPS63260429A/en
Publication of JPH0788041B2 publication Critical patent/JPH0788041B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • 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
    • B29C66/50—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
    • B29C66/5229—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
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • B29C66/52291—Joining tubular articles involving the use of a socket said socket comprising a stop
    • B29C66/52292—Joining tubular articles involving the use of a socket said socket comprising a stop said stop being internal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • B29C66/52298—Joining tubular articles involving the use of a socket said socket being composed by several 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
    • B29C66/50—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
    • B29C66/61—Joining from or joining on the inside
    • B29C66/612—Making circumferential 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
    • B29C66/63—Internally supporting the article during joining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3468—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the means for supplying heat to said heated elements which remain in the join, e.g. special electrical connectors of windings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
    • B29C65/3476—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined

Landscapes

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

Abstract

PURPOSE:To make conveyance of a device easy and to enable, moreover, connection of the same reliably and simply even outdoors, by a method wherein inside diameter-supporting metal fittings of apecific structure is inserted within an inner pipe, the inner pipe is inserted within an outer pipe by winding a heating unit such as a metallic wire round the outside of the inner pipe and the inner and outer pipes are melted and stuck together by electrifying the heating unit while clamping down the outside of the outer pipe with outside diameter- supporting metal fittings. CONSTITUTION:Inside diameter-supporting metal fittings 40 are fitted to a pipe 1A, and a heating wire 3 is wound round the outside of the pipe 1A. Then after insertion of the same into a socket connector 12, outside diameter-supporting metal fittings 30 are fitted to one side of the same. In this instance, a heating unit of the inner supporting metal fittings is heated by connecting an electric wire 43 with an outside electric power source. Therefore, a main body 41 is constituted so that it is held at a predetermined temperature, centered on the inside of an inner pipe and holds the inner pipe firmly. Then the heating wire 3 is heated for a predetermined period of time at the predetermined temperature by connecting the heating wire 3 with the electric power source and a molten part is pressed by clamping down the outside diameter-supporting metal fittings 30 at need. After completion of heating, both the electric power sources for a heating unit and the heating wire are disconnected for cooling. Then the inside diameter-supporting metal fittings 40 are fitted to a pipe 1B and the pipe 1B is welded to the other end of the socket connector 12 by a similar method.

Description

【発明の詳細な説明】 （３−１）産業上の利用分野 本発明はポリエチレン等熱可塑性プラスチックパイプの
接続方法に係り、詳細にはジュール熱による発熱体を利
用したソケット溶接による接続方法であって、内径支持
金具、外径支持金具によって、溶融部分を圧迫すること
によって確実な接着を可能としたプラスチックパイプの
接続方法に関する。DETAILED DESCRIPTION OF THE INVENTION (3-1) Field of Industrial Application The present invention relates to a method for connecting a thermoplastic pipe such as polyethylene, and more particularly to a connection method by socket welding using a heating element by Joule heat. The present invention relates to a method for connecting a plastic pipe in which the inner diameter support fitting and the outer diameter support fitting are pressed against the melted portion to ensure reliable adhesion.

（３−２）従来の技術 熱可塑性プラスチックのうち、ポリエチレン等は、化学
的にきわめて安定である反面、良好な接着剤がなく、接
着強度が母材強度の数分の一程度のものしか得られてい
ないのが現状である。(3-2) Conventional Technology Among thermoplastics, polyethylene and the like are chemically extremely stable, but have no good adhesive and only have an adhesive strength of a fraction of the base metal strength. The current situation is that it is not done.

したがって、強度を必要とするポリエチレン等のプラス
チックパイプの接続には、接続金具を用いる機械的な接
続方法か、熱融着による接続方法が常用されている。Therefore, for connection of a plastic pipe such as polyethylene which requires strength, a mechanical connection method using connection fittings or a connection method by heat fusion is commonly used.

ポリエチレン等のプラスチックパイプは定尺物でなく、
長尺物をドラムに巻付けて供給されることが多く、鍔付
きパイプは殆ど供給されていない。したがって、機械的
接続方法においては、接続金具とパイプ本体との固定は
両者間の摩擦力によるか、または管端を押し広げて継な
ぐいわゆるフレヤ方式によるかであるが、いずれも確実
性に欠け、2B以上の口径のパイプには不向きであるとさ
れている。Plastic pipes such as polyethylene are not standard lengths,
Long products are often supplied by winding them around a drum, and a pipe with a collar is hardly supplied. Therefore, in the mechanical connection method, the connection between the fitting and the pipe body is fixed by the frictional force between them or by the so-called flare method in which the pipe end is spread and connected, but neither is reliable. It is said that it is not suitable for pipes with a diameter of 2B or more.

さらに本質的にはプラスチック配管は腐食性雰囲気内で
金属材料に代るものとしてその威力を発揮するものであ
るが、そのような場合、機械的接続方法においては、高
価な耐食性金属を使用しなければならず、プラスチック
配管の利点が半減するという欠点があった。Furthermore, plastic pipes are essentially effective as a substitute for metallic materials in corrosive atmospheres.In such cases, expensive corrosion-resistant metal must be used in the mechanical connection method. However, there is a drawback in that the advantages of plastic piping are halved.

ポリエチレン等のプラスチックパイプの熱融着による接
続方法としては、こて等の加熱具を用い、接着面を加熱
溶融した後、密着せしめて溶着する方法が採られてい
る。この方法はバット溶接にもソケット溶接にも採用さ
れているが、接着面の溶融状態、接着面の押付け圧力等
の微妙な調整が必要であり、工場内で厳重な管理を行な
いながら施行するときは、確実な接続を得られるが、配
管の工事現場等屋外であって、風、雨、湿気等の外部条
件が変化する中では確実な接着を得ることは難かしかっ
た。As a method for connecting a plastic pipe made of polyethylene or the like by heat fusion, there is adopted a method in which a heating tool such as a trowel is used to heat and melt the adhesive surface, and then the materials are brought into close contact and welded. This method is used for both butt welding and socket welding, but it requires delicate adjustments such as the melted state of the adhesive surface and the pressing pressure on the adhesive surface, so when performing it while performing strict control in the factory. It is possible to obtain a reliable connection, but it was difficult to obtain a reliable adhesion outside the construction site of the piping and under the changing external conditions such as wind, rain and humidity.

最近この従来の熱融着による接続方法の欠点を改良し、
小型で感度のよい各種のセンサー類を活用して工事現場
等の屋外であっても確実な接着が得られるような装置が
開発されているが、装置が高価であり、取扱いが厄介で
あり、また構造が複雑で重いために、持運びが大変であ
るという欠点を免れることはできなかった。Recently, the drawbacks of the conventional connection method by heat fusion have been improved,
A device has been developed that makes it possible to obtain reliable adhesion even when outdoors such as at a construction site by utilizing various small and sensitive sensors, but the device is expensive and difficult to handle. In addition, the structure is complicated and heavy, and it is inevitable that it is difficult to carry.

ポリエチレン等のプラスチックパイプの熱融着による接
続方法としては、前記以外に金属線または金属箔に通電
しその際に発生するジュール熱を利用する方法が提示さ
れている。第５図に示されるものがその一例である。同
図において、プラスチックパイプ1A、1Bは端部を突き合
せられ、内側にスペーサー２がパイプ1A、1Bの両方にま
たがって挿入される。パイプ1A、1Bの外面にはジュール
熱による発熱体である電熱線３が巻付けられ、その外側
にパイプと同質のプラスチックシート４が装着され、さ
らにその外周はゴムテープ５が巻付けられる。電熱線に
通電することによって、パイプ1A、1Bはバット溶接され
る。In addition to the above, as a method for connecting a plastic pipe such as polyethylene by heat fusion, a method of applying Joule heat generated at that time by energizing a metal wire or a metal foil has been proposed. An example is shown in FIG. In the figure, the ends of the plastic pipes 1A and 1B are butted, and the spacer 2 is inserted inside the pipes 1A and 1B. A heating wire 3 which is a heating element by Joule heat is wound around the outer surfaces of the pipes 1A and 1B, a plastic sheet 4 of the same quality as the pipe is mounted on the outer side thereof, and a rubber tape 5 is wound around the outer periphery thereof. By energizing the heating wire, the pipes 1A and 1B are butt welded.

この方法は場合によってはゴムテープ５の巻付け張力が
不足して、電熱線３、パイプ1A、1Bの間等に存在する空
気が抜けきらず、気密性に欠ける接続が行なわれるおそ
れがある。さらにパイプ1A、1Bの内面に挿入したスペー
サー２を後から取除く手段がないため、腐食性雰囲気で
使用するときはスペーサーには高価な耐食材料を使用し
なければならず原価高になり、さらにそれ以上の欠点と
しては取残されたスペーサーが配管の隘路部分となり、
流路抵抗が大きくなり、場合によっては管路閉塞の原因
ともなる。In this method, the winding tension of the rubber tape 5 may be insufficient in some cases, and the air existing between the heating wire 3 and the pipes 1A, 1B may not be exhausted, resulting in a connection lacking in airtightness. Furthermore, since there is no means to remove the spacer 2 inserted into the inner surface of the pipes 1A and 1B later, when using in a corrosive atmosphere, an expensive corrosion resistant material must be used for the spacer, which increases the cost. As a further disadvantage, the spacer left behind becomes a bottleneck part of the pipe,
The flow path resistance is increased, and in some cases, it may cause blockage of the conduit.

従来また以上述べた欠点を解消するために第６図に示す
ようなプラスチックパイプの接続方法が提示されている
（昭和55年特許出願公告第213号）。この方法は内管と
外管との間に電熱線を巻付け、それに電流を通しその発
熱によって溶着するソケット溶接による方法であるが、
溶融部分を内方と外方とから圧迫してその部分の気泡等
を追出し、確実な接着を図り、同時に接着後管内部に隘
路部分となるようなスペーサー等を残さないものであ
る。Conventionally, and in order to eliminate the above-mentioned drawbacks, a method of connecting plastic pipes has been proposed as shown in FIG. 6 (Japanese Patent Application Publication No. 213 of 1980). This method is a method by which a heating wire is wound between the inner tube and the outer tube, and a current is passed through the heating wire to weld it by heat generation.
The melted portion is pressed from the inside and the outside to expel air bubbles and the like in the portion to ensure reliable bonding, and at the same time, after bonding, a spacer or the like that becomes a bottleneck portion is not left inside the pipe.

すなわち同図において、内管６の内側には内径支持金具
20が挿入され、支持板21が内管６の内壁に密着すること
によって支えられている。That is, in the figure, the inner diameter support fitting is provided inside the inner pipe 6.
20 is inserted, and the support plate 21 is supported by closely contacting the inner wall of the inner tube 6.

内管６の外側には、電熱線３が巻付けられ、電熱線の巻
付け後の内管６の外径とほぼ等しい内径を持つ外管７が
装着されている。外管７の外側には外径支持金具30がそ
の内壁が外管の外壁に密着するように取付けられてい
る。The heating wire 3 is wound on the outer side of the inner tube 6, and an outer tube 7 having an inner diameter substantially equal to the outer diameter of the inner tube 6 after winding the heating wire is mounted. An outer diameter support fitting 30 is attached to the outside of the outer pipe 7 such that its inner wall is in close contact with the outer wall of the outer pipe.

内径支持金具20の一端は可撓管８に接続され、その内部
には加圧管９、ドレン管10が収納されている。可撓管８
は外管から外部に取出され、加圧管９、ドレン管10は水
圧ポンプ11に接続されている。One end of the inner diameter support fitting 20 is connected to the flexible tube 8, and a pressurizing tube 9 and a drain tube 10 are housed inside the flexible tube 8. Flexible tube 8
Is taken out from the outer pipe, and the pressurizing pipe 9 and the drain pipe 10 are connected to the hydraulic pump 11.

第７図は内径支持金具の構造を示す断面を含んだ正面
図、第８図はその左側面図である。第７図および第８図
において、内径支持金具の本体22はシリンダ部22A、カ
ム収納部22B、案内部22Cから成り、カム収納部の外周に
は複数個のボス22Dが設けられている（図示のものは４
個）。本体内部にはカム軸23が収納されている。カム軸
23はピストン23A、カム23B、案内軸23Cより成る。FIG. 7 is a front view including a cross section showing the structure of the inner diameter support fitting, and FIG. 8 is a left side view thereof. 7 and 8, the main body 22 of the inner diameter support fitting is composed of a cylinder portion 22A, a cam storage portion 22B, and a guide portion 22C, and a plurality of bosses 22D are provided on the outer circumference of the cam storage portion (illustration). The one is 4
Individual). The cam shaft 23 is housed inside the main body. Cam shaft
23 comprises a piston 23A, a cam 23B, and a guide shaft 23C.

ピストン23Aは本体22のシリンダ部22Aに、案内軸23Cは
本体22の案内部22Cにそれぞれ摺動可能に嵌合されてい
る。本体22の案内部22Cにはばね24が挿入され、カム軸2
3はばね挿入後本体22に挿入されて、蓋25によって本体2
2に固定されている。The piston 23A is slidably fitted in the cylinder portion 22A of the body 22, and the guide shaft 23C is slidably fitted in the guide portion 22C of the body 22. A spring 24 is inserted in the guide portion 22C of the main body 22, and the cam shaft 2
3 is inserted into the main body 22 after spring insertion, and the main body 2 is
It is fixed at 2.

本体22のシリンダ部22Aには蓋25が取付けられている。
蓋25には下部に加圧水通路25A、上部にドレン通路25Bが
穿孔され、それぞれ加圧管９、ドレン管10に接続されて
いる。また蓋25には可撓管８が固定されている。A lid 25 is attached to the cylinder portion 22A of the main body 22.
A pressurized water passage 25A is formed in the lower portion of the lid 25, and a drain passage 25B is formed in the upper portion thereof, which are connected to the pressure pipe 9 and the drain pipe 10, respectively. The flexible tube 8 is fixed to the lid 25.

支持板21は板21A、支持軸21B、ばね受21C、カム接触部2
1Dより成る。板21Aは内管６の内径とほぼ等しい外径を
持つ中空円筒のほぼ四半分の形状をしたものの複数個
（図示のものは４個）から成っている。板の巾は内管６
と外管７との差込み深さとほぼ等しい寸法に加工成型さ
れている。４個の板21Aのそれぞれほぼ中央に支持軸21B
が固定され、支持軸21Bの他端はばね受21C、カム接触21
Dとなっている。The support plate 21 includes a plate 21A, a support shaft 21B, a spring bearing 21C, and a cam contact portion 2
Composed of 1D. The plate 21A is made up of a plurality (four in the figure) of a hollow cylinder having an outer diameter substantially equal to the inner diameter of the inner tube 6 and having a substantially quarter shape. The width of the plate is the inner tube 6
And the outer tube 7 are formed to have a size substantially equal to the insertion depth. Support shafts 21B are provided at the centers of the four plates 21A.
Is fixed, and the other end of the support shaft 21B has a spring bearing 21C and a cam contact 21.
It is D.

支持板21はばね受21Cが本体22のボス22Dに穿孔された孔
に摺動可能に嵌合され、ばね26およびばね抑え27によっ
て、カム軸23のカム23Bにカム接触部21Dが押付けられた
形で本体22に固定されている。The support plate 21 has a spring receiver 21C slidably fitted in a hole formed in the boss 22D of the main body 22, and the cam contact portion 21D is pressed against the cam 23B of the cam shaft 23 by the spring 26 and the spring retainer 27. It is fixed to the body 22 in shape.

第９図は外径支持金具30の構造を示した正面図、第10図
はその側面の断面図である。両図において、外径支持金
具30は内径がほぼ外管の外径と等しい円筒形を２っ割り
にした形状を持つ２個の半割金具31より成り、ボルト3
2、ナット33により外管の外壁に密着するように締付け
られている。半割金具31の巾は支持板21の板21Aの巾と
ほぼ等しくなっている。FIG. 9 is a front view showing the structure of the outer diameter support fitting 30, and FIG. 10 is a side sectional view thereof. In both figures, the outer diameter support metal fitting 30 is composed of two half metal fittings 31 each having a cylindrical shape whose inner diameter is approximately equal to the outer diameter of the outer pipe, and which is formed by a bolt 3
2. The nut 33 is tightened so as to come into close contact with the outer wall of the outer tube. The width of the half metal fitting 31 is substantially equal to the width of the plate 21A of the support plate 21.

以上述べた内径支持金具、外径支持金具を用いたプラス
チックパイプの接続は次のような方法で行なわれる。先
ずドレン管10のバルブ（図示していない）を開いた状態
にすれば、内径支持金具20のシリンダ部22Aは加圧され
ない状態となり、カム軸23はばね24の力により、第７図
における右方向に押付けられ、カム23B、ばね26の作用
によって、支持板21は内径支持金具20の中心部に引寄せ
られる。その結果支持板21の外径は内管６の内径よりも
かなり小さくなる。The connection of the plastic pipe using the inner diameter support fitting and the outer diameter support fitting described above is performed by the following method. First, if the valve (not shown) of the drain pipe 10 is opened, the cylinder portion 22A of the inner diameter support fitting 20 is not pressurized, and the cam shaft 23 is pressed by the force of the spring 24 to the right in FIG. The support plate 21 is pushed toward the center of the inner diameter support fitting 20 by the action of the cam 23B and the spring 26. As a result, the outer diameter of the support plate 21 is considerably smaller than the inner diameter of the inner pipe 6.

この状態で内径支持金具20を内管６の中に挿入し、次い
でドレン管10のバルブを閉め、水圧ポンプ11を作動せし
めれば、加圧水は加圧管９から加圧水通路25Aを経て、
本体22のシリンダ部22Aに送られ、カム軸23は第６図に
おける左方向に移動し、カム23Bとカム接触部21Dとの作
用により、支持板21は内径支持金具20の中心から外方に
押し出される。支持板21の外径が内管６の内径とほぼ等
しくなった所で水圧ポンプの作動を止め、内管６の外側
に電熱線３を巻き、さらに外管７をその外側にかぶせ、
外径支持金具30を取付けた後電熱線に電気を通して加熱
する。In this state, the inner diameter support fitting 20 is inserted into the inner pipe 6, and then the valve of the drain pipe 10 is closed and the hydraulic pump 11 is operated, whereby the pressurized water passes from the pressurizing pipe 9 through the pressurized water passage 25A,
The cam shaft 23 is sent to the cylinder portion 22A of the main body 22 and moves leftward in FIG. 6, and the support plate 21 moves outward from the center of the inner diameter support bracket 20 by the action of the cam 23B and the cam contact portion 21D. Pushed out. When the outer diameter of the support plate 21 becomes substantially equal to the inner diameter of the inner pipe 6, the operation of the hydraulic pump is stopped, the heating wire 3 is wound on the outer side of the inner pipe 6, and the outer pipe 7 is covered on the outer side.
After attaching the outer diameter support fitting 30, electricity is passed through the heating wire for heating.

加熱途中適宜水圧ポンプ11を作動せしめて支持板21を押
し出し、または外径支持金具30をナット33によって締付
け、加熱溶融部を圧迫する。所定時間加熱後、ドレン管
10のバルブを開いて内径支持金具20を取出し、また外径
支持金具30を取外して内管６と外管７との接続は完了す
る。During heating, the water pressure pump 11 is appropriately operated to push out the support plate 21, or the outer diameter support fitting 30 is tightened by the nut 33 to press the heating and melting portion. After heating for a predetermined time, drain tube
The valve 10 is opened to take out the inner diameter support fitting 20, and the outer diameter support fitting 30 is removed to complete the connection between the inner pipe 6 and the outer pipe 7.

以上述べた従来のプラスチックパイプの接続方法は、プ
ラスチックの加熱が外管と内管との間で行なわれるた
め、風、雨等の影響がなく、また加熱がジュール熱によ
って行なわれるため、入熱が一定しており、さらに加熱
部を圧迫するため、ガス等を溶融部分から追出すことが
できるので、きわめて確実な接着を行なうことができ
る。In the conventional plastic pipe connection method described above, since the plastic is heated between the outer pipe and the inner pipe, there is no influence of wind, rain, etc. Is constant, and since the heating portion is further pressed, gas and the like can be expelled from the molten portion, so that extremely reliable bonding can be performed.

しかしながらこの方法に使用する内径支持金具はその構
造がきわめて複雑であるため、11/2B以下の配管には適
用しにくいという欠点があり、また水圧ポンプのように
大きくて重い道具が必要であり、持運びが厄介であると
いう欠点もあった。However, since the inner diameter support fitting used in this method has an extremely complicated structure, it has a drawback that it is difficult to apply to pipes of 1 1/2 B or less, and a large and heavy tool such as a hydraulic pump is required, It also had the drawback of being difficult to carry.

（３−３）発明が解決しようとする問題点 本発明は以上述べた従来のプラスチックパイプの接続方
法の欠点を解消し、11/2B以下の配管にも適用でき、装
置の持運びが容易でしかも屋外においても確実、簡単に
行ない得るプラスチックパイプの接続方法を提供しよう
とするものである。(3-3) Problems to be Solved by the Invention The present invention solves the above-mentioned drawbacks of the conventional plastic pipe connection method and can be applied to pipes of 11 / 2B or less, which makes the device easy to carry. Moreover, it is an object of the present invention to provide a method for connecting plastic pipes that can be reliably and easily performed outdoors.

（３−４）問題点を解決するための手段およびその作用 本発明はプラスチックパイプを次のような方法で接続す
ることによって、前記した問題点を解決しているのであ
る。すなわちそれは、内管の内側に後記（ａ）〜（ｃ）
の要素を有する内径支持金具を挿入して内管に取付け、
内管の外側に金属線等のジュール熱による発熱体を巻い
て外管の内側に挿入し、外管の外側に締付け手段を有す
る外径支持金具を装着した後、必要に応じて外径支持金
具を締付けながら前記発熱体に電流を通じて内外管を溶
融接着するプラスチックパイプの接続方法である。(3-4) Means for Solving Problems and Actions Thereof The present invention solves the above problems by connecting plastic pipes in the following manner. That is, it is described below (a) to (c) inside the inner tube.
Insert the inner diameter support fitting with the element of and attach it to the inner pipe,
Wrap a heating element by Joule heat such as metal wire on the outside of the inner tube, insert it inside the outer tube, and attach an outer diameter support fitting with a tightening means on the outer side of the outer tube, then support the outer diameter as necessary. It is a method of connecting a plastic pipe in which an inner and outer tubes are melt-bonded by passing an electric current through the heating element while tightening a metal fitting.

（ａ）断面が楕円または長孔状をなす金属製のパイプ中
に常温付近に沸点を有する液体を充填して両端を密閉
し、常温付近においてはさしわたし寸法が前記内管の内
径よりも小さい渦巻状をなし、常温より高い所定温度以
上では外径が前記内管の内径と同一または大きい円弧状
をなす如く成型されている１個または２個以上のブルド
ン管状体から成る本体。(A) A metal pipe having an elliptical or oblong cross section is filled with a liquid having a boiling point near room temperature and both ends are sealed. A main body made of one or more bourdon tubular bodies which are formed in a small spiral shape and are formed to have an arc shape whose outer diameter is equal to or larger than the inner diameter of the inner tube at a predetermined temperature higher than room temperature.

（ｂ）前記ブルドン管状体の内部または内側に取付けら
れ、外部の電源に接続されているジュール熱による発熱
体。(B) A heating element by Joule heat that is attached to the inside or inside of the Bourdon tubular body and is connected to an external power source.

（ｃ）前記本体に取付けられ、外部にその端部が取出さ
れている紐状体。(C) A string-shaped body attached to the main body and having an end portion taken out to the outside.

このような方法によれば、内径支持金具は常温付近では
その寸法が内管の内径よりも小さいので、内管の適当な
開口部分から挿入して、接続部分に自由に移動させるこ
とができ、そこで外部からジュール熱を加えることによ
って、内管内部に芯出しされ、内管を内側からしっかり
と支持する。したがって内管の外側に電熱線を巻き、外
管に挿入し、電熱線に電流を通じ、加熱して内管が軟化
しても変形して内側にだれ込むこともなく、外管の外側
に外径支持金具を装着して電熱線の加熱中に締付ければ
プラスチックパイプの溶融部分に充分な圧力が加わり、
その部分に介在する空気その他の気体を追出し、確実な
熱融着が可能となる。According to such a method, since the inner diameter support fitting has a size smaller than the inner diameter of the inner pipe at around room temperature, it can be freely moved to the connecting portion by inserting it from the appropriate opening portion of the inner pipe. Then, by applying Joule heat from the outside, it is centered inside the inner pipe and firmly supports the inner pipe from the inside. Therefore, a heating wire is wound on the outside of the inner tube, inserted into the outer tube, and an electric current is passed through the heating wire. If you attach a diameter support fitting and tighten it while heating the heating wire, sufficient pressure will be applied to the molten part of the plastic pipe,
Air and other gases present in that portion are expelled, and reliable heat fusion becomes possible.

（３−５）実施例 以下図面に基づいて本発明の実施例について説明する。
第１図は本発明に係るプラスチックパイプの接続方法を
例示した図である。本方法の場合にあっても先に説明し
た従来例と同様、内管６の外側にはジュール熱による発
熱体である電熱線３が巻付けられており、これを外管７
にさし込み、外管７の外側には外径支持金具を、内管の
内側には内径支持金具を取付け、電熱線を加熱して溶着
するようになっている。しかしながら、内径支持金具40
の構造が従来の内径支持金具と全く異なっている。(3-5) Example An example of the present invention will be described below with reference to the drawings.
FIG. 1 is a diagram illustrating a method for connecting plastic pipes according to the present invention. Even in the case of this method, as in the conventional example described above, the heating wire 3 which is a heating element by Joule heat is wound on the outer side of the inner tube 6, and this is heated by the outer tube 7.
An outer diameter support fitting is attached to the outside of the outer tube 7 and an inner diameter support fitting is attached to the inside of the inner tube to heat and heat the heating wire. However, the inner diameter support bracket 40
The structure of is completely different from the conventional inner diameter support fitting.

すなわち、同図において内径支持金具40は断面が楕円ま
たは長孔状（例示したものは長孔状）をなす金属製のパ
イプ中に常温付近に沸点を有する液体を充填して両端を
密閉したブルドン管状体の１個または複数個（図示のも
のは１個）から成る本体41、本体の内部または内側に取
付けられているジュール熱による発熱体（図示されてい
ない）、その一端は本体41に取付けられ、他端は外部に
取出されている紐状体42、その一端が前記発熱体に連結
され、他端が外部に取出されている電線43とから成って
いる。That is, in the figure, the inner diameter support fitting 40 is a Bourdon whose both ends are sealed by filling a liquid having a boiling point near room temperature into a metal pipe having an elliptical or long hole-shaped cross section (the long hole is illustrated). Main body 41 consisting of one or more tubular bodies (one shown), Joule heating element (not shown) mounted inside or inside the body, one end of which is mounted on body 41 The other end is composed of a string-shaped body 42 that is taken out to the outside, and an electric wire 43 that is connected to the heating element at one end and is taken out to the outside at the other end.

前記ブルドン管状体の中に充填されるべき液体は１気圧
における沸点が常温付近のものであればよく、たとえば
水、水とアルコールとの共沸混合物、冷媒として常用さ
れているＲ−113等を使用することができる。ただし充
填に際しては常温付近で所定容積の気相部分を持つよう
にしなければならない。The liquid to be filled in the Bourdon tubular body may have a boiling point at 1 atm near room temperature, and examples thereof include water, an azeotropic mixture of water and alcohol, and R-113 commonly used as a refrigerant. Can be used. However, at the time of filling, it is necessary to have a predetermined volume of gas phase portion near room temperature.

第２図は本体41の正面の断面図、第３図はその右側面図
である。両図において本体41は常温よりも高い所定の温
度（θ）で両図の実線で示されるような円筒の側面の１
ケ所に切割り41Aを有する形状をなし、常温付近では第
３図の２点鎖線で示すような渦巻き状の形状をなすよう
に成型されている。温度θは常温より高くパイプ材料で
あるプラスチックの軟化点よりも低い適宜の温度が選定
されている。FIG. 2 is a front sectional view of the main body 41, and FIG. 3 is a right side view thereof. In both figures, the main body 41 is at a predetermined temperature (θ) higher than room temperature and is located on one side of the cylindrical side as shown by the solid line in both figures.
It has a shape having a slit 41A at a place, and is molded to have a spiral shape as shown by a chain double-dashed line in FIG. 3 at around room temperature. The temperature θ is selected to be higher than normal temperature and lower than the softening point of the plastic material of the pipe.

この両図の実線で示された円筒の直径ｄは内管６の内径
と同一である僅かに大きい寸法となっている。また第３
図の２点鎖線で示される渦巻き状の最大寸法（さしわた
し寸法）は内管６の内径よりもかなり小さな寸法となっ
ており、したがってこの内径支持金具40は常温では内管
内を自由に通ることが出来る。The diameter d of the cylinder shown by the solid line in these figures is slightly larger than the inner diameter of the inner tube 6. Also the third
The maximum size of spiral (shown by I) shown by the chain double-dashed line in the figure is much smaller than the inner diameter of the inner pipe 6, and therefore the inner diameter support fitting 40 freely passes through the inner pipe at room temperature. You can

本例に示すプラスチックパイプの接続方法に使用する外
径支持金具30は第９図および第10図に示した従来のもの
と全く同一の構造を有しておりその使用方法も従来の例
と同様であるので説明は省略する。The outer diameter support metal fitting 30 used in the method of connecting the plastic pipes shown in this example has exactly the same structure as the conventional one shown in FIGS. 9 and 10, and its usage is the same as the conventional example. Therefore, the description is omitted.

第４図（イ）、（ロ）、（ハ）は本発明に係る方法を使
用して２本のプラスチックパイプ1A、1Bをソケット継手
12で接続する手順を示した図である。同図においてまず
パイプ1Aに内径支持金具40を取付け、パイプ1Aの外側に
電熱線３を巻付け次いでソケット継手12に挿入した後、
外径支持金具30をその片側に取付ける（（ロ）図参
照）。この際内径支持金具の発熱体は外部電源に電線43
を接続することによって加熱されており、そのために本
体41は所定の温度θに保持され、したがって本体41は内
管の内部に芯出しされ内管をしっかり保持するようにな
っている。次に電熱線３を電源に接続して所定温度で所
定時間加熱し、必要に応じて外径支持金具を締付けて溶
融部分を圧迫する（（ロ）図参照）。加熱終了後は発熱
体、電熱線３の両方の電源を切り冷却せしめる。内径支
持金具の本体41が常温になれば、元の形状である渦巻き
形となるので、内管の内部から容易に取出すことができ
る。次いでパイプ1Bに内径支持金具40を取付け、前記し
たと同様な方法でソケット継手12の他方の端部にパイプ
1Bを溶着する（（ハ）図参照）。この際内径支持金具の
紐状体42、電線43はパイプ1Bの開放されている端部から
外部に取出されているので、溶着後冷却された内径支持
金具はその開放端部から紐状体42を引張ることによって
取出される。4 (a), (b), and (c) show two plastic pipes 1A and 1B as socket joints using the method according to the present invention.
It is the figure which showed the procedure of connecting by 12. In the figure, first, the inner diameter support fitting 40 is attached to the pipe 1A, the heating wire 3 is wound on the outer side of the pipe 1A, and then inserted into the socket joint 12,
Attach the outer diameter support bracket 30 to one side (see figure (b)). At this time, the heating element of the inner diameter support fitting should be
The main body 41 is kept at a predetermined temperature θ for that reason, and therefore the main body 41 is centered inside the inner pipe to firmly hold the inner pipe. Next, the heating wire 3 is connected to a power source and heated at a predetermined temperature for a predetermined time, and if necessary, the outer diameter support fitting is tightened to press the molten portion (see (b)). After the heating is finished, both the heating element and the heating wire 3 are turned off to cool them. When the body 41 of the inner diameter support fitting is at room temperature, it has the original spiral shape, so that it can be easily taken out from the inside of the inner tube. Next, attach the inner diameter support fitting 40 to the pipe 1B, and pipe the other end of the socket joint 12 in the same manner as described above.
Weld 1B (see Figure (C)). At this time, since the cord-like body 42 of the inner diameter support fitting and the electric wire 43 are taken out from the open end of the pipe 1B, the inner diameter support fitting cooled after welding is cooled from the open end. Is pulled out by pulling.

（３−６）発明の効果 以上述べたことを要約すれば本発明は次に示すような極
めて優れた効果を有するものである。(3-6) Effects of the Invention In summary of what has been described above, the present invention has the following extremely excellent effects.

金属の継手を必要としないため安価でしかも耐食性
にすぐれた配管系を得ることができる。Since no metal joint is required, it is possible to obtain a piping system that is inexpensive and has excellent corrosion resistance.

すぐれた接着剤のないポリエチレン等のパイプも確
実に接着することができる。A pipe made of polyethylene or the like, which does not have an excellent adhesive, can be reliably bonded.

配管中にスペーサ等を残すことがないため隘路形成
したり、つまりの原因を招いたりすることがない。Since no spacers or the like are left in the pipe, a bottleneck is not formed or the cause of clogging is not caused.

溶着部分を圧迫して空気ガス等を追い出すために接
着がきわめて確実である。Adhesion is extremely reliable because the welded part is pressed to expel air gas and the like.

加熱はジュール熱によっているためその入熱量の制
御が容易であり、そのため確実な接着を得ることができ
る。Since the heating is performed by Joule heat, the amount of heat input can be easily controlled, so that reliable bonding can be obtained.

溶着は内管と外管との間で行なわれるため雨、風、
外気温度等によって大きな影響を受けることがない。Welding is done between the inner and outer tubes, so rain, wind,
It is not significantly affected by the outside temperature.

内径支持金具およびその他の工具の構造がきわめて
簡単であるため11/2B以下の小さな配管にも充分適用す
ることができる。Since the structure of the inner diameter support and other tools is extremely simple, it can be sufficiently applied to small pipes of 11 / 2B or smaller.

使用する工具がすべて小型軽量であるため電源が利
用できる場所であればどんなところでも作業をすること
ができる。All the tools used are small and lightweight, so you can work wherever power is available.

内径支持金具の取出しが容易であるため極めて長い
配管同志の接続も容易である。Since it is easy to take out the inner diameter support fitting, it is easy to connect extremely long pipes.

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

第１図は本発明に係るプラスチックパイプの接続方法を
例示した図、第２図は内径支持金具の本体の正面の断面
図、第３図はその右側面図、第４図（イ）、（ロ）、
（ハ）は本発明に係る方法を使用して２本のプラスチッ
クパイプをソケット継手で接続する手順を示した図、第
５図は従来提示されているプラスチックパイプの接続方
法を例示した図、第６図は従来提示されている別の方法
を示した図、第７図はそれに使用する内径支持金具の構
造を示す断面を含む正面図、第８図はその左側面図、第
９図は外径支持金具の構造を示した正面図、第10図はそ
の側面の断面図である。 1A、1B……プラスチックパイプ ２……スペーサー、３……電熱線 ４……プラスチックシート ５……ゴムテープ、６……内管 ７……外管、８……可撓管 ９……加圧管、10……ドレン管 11……水圧ポンプ、12……ソケット継手 20……内径支持金具 21……支持板、21A……板 21B……支持軸、21C……ばね受 21D……カム接触部、22……本体 22A……シリンダ部、22B……カム収納部 22C……案内部、22D……ボス 23……カム軸、23A……ピストン 23B……カム、23C……案内軸 24……ばね、25……蓋 25A……加圧水路、25B……ドレン水路 26……ばね、27……ばね抑え 30……外径支持金具 31……半割金具、32……ボルト 33……ナット 40……内径支持金具 41……本体、42……紐状体 43……電線FIG. 1 is a diagram illustrating a method for connecting a plastic pipe according to the present invention, FIG. 2 is a cross-sectional view of the front surface of the main body of the inner diameter support fitting, FIG. 3 is a right side view thereof, and FIG. B),
FIG. 5C is a diagram showing a procedure for connecting two plastic pipes with a socket joint by using the method according to the present invention, and FIG. 5 is a diagram showing a conventional plastic pipe connection method, 6 is a view showing another method conventionally presented, FIG. 7 is a front view including a cross section showing the structure of an inner diameter support fitting used therein, FIG. 8 is a left side view thereof, and FIG. 9 is an outer view. FIG. 10 is a front view showing the structure of the diameter support fitting, and FIG. 10 is a sectional view of the side surface thereof. 1A, 1B ... Plastic pipe 2 ... Spacer, 3 ... Heating wire 4 ... Plastic sheet 5 ... Rubber tape, 6 ... Inner tube 7 ... Outer tube, 8 ... Flexible tube 9 ... Pressure tube, 10 …… drain pipe 11 …… hydraulic pump, 12 …… socket joint 20 …… inner diameter support fitting 21 …… support plate, 21A …… plate 21B …… support shaft, 21C …… spring bearing 21D …… cam contact part, 22 …… Main body 22A …… Cylinder part, 22B …… Cam storage part 22C …… Guide part, 22D …… Boss 23 …… Cam shaft, 23A …… Piston 23B …… Cam, 23C …… Guide shaft 24 …… Spring , 25 …… Lid 25A …… Pressurized water channel, 25B …… Drain water channel 26 …… Spring, 27 …… Spring restraint 30 …… Outer diameter support fitting 31 …… Half fitting, 32 …… Bolt 33 …… Nut 40… … Inner diameter support bracket 41… Main body, 42… String-like body 43… Electric wire

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】内管の内側に後記（ａ）〜（ｃ）の要素を
有する内径支持金具を挿入して内管に取付け、内管の外
側に金属線等のジュール熱による発熱体を巻いて外管の
内側に挿入し、外管の外側に締付け手段を有する外径支
持金具を装着した後、必要に応じて外径支持金具を締付
けながら前記発熱体に電流を通じて内外管を溶融接着す
るプラスチックパイプの接続方法。 （ａ）断面が楕円または長孔状をなす金属製のパイプ中
に常温付近に沸点を有する液体を充填して両端を密閉
し、常温付近においてはさしわたし寸法が前記内管の内
径よりも小さい渦巻状をなし、常温より高い所定温度以
上では外径が前記内管の内径と同一または大きい円弧状
をなす如く成型されている１個または２個以上のブルド
ン管状体から成る本体 （ｂ）前記ブルドン管状体の内部または内側に取付けら
れ、外部の電源に接続されているジュール熱による発熱
体 （ｃ）前記本体に取付けられ、外部にその端部が取出さ
れている紐状体1. An inner diameter support fitting having elements (a) to (c) described below is inserted inside the inner tube to be attached to the inner tube, and a heating element such as a metal wire is wound around the inner tube by Joule heat. The inner diameter of the outer tube and the outer diameter of the outer tube is attached to the outer tube by tightening the outer diameter of the outer diameter of the outer tube. How to connect plastic pipes. (A) A metal pipe having an elliptical or oblong cross section is filled with a liquid having a boiling point near room temperature and both ends are sealed. A body composed of one or more bourdon tubular bodies formed in a small spiral shape and having an outer diameter equal to or larger than the inner diameter of the inner tube at a predetermined temperature higher than room temperature or more (b) Joule heat-producing heating element attached to the inside or inside of the Bourdon tubular body and connected to an external power source. (C) A string-shaped element attached to the main body and having its end taken out to the outside.
JP62094627A 1987-04-17 1987-04-17 How to connect the plastic pipe Expired - Lifetime JPH0788041B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62094627A JPH0788041B2 (en) 1987-04-17 1987-04-17 How to connect the plastic pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62094627A JPH0788041B2 (en) 1987-04-17 1987-04-17 How to connect the plastic pipe

Publications (2)

Publication Number Publication Date
JPS63260429A JPS63260429A (en) 1988-10-27
JPH0788041B2 true JPH0788041B2 (en) 1995-09-27

Family

ID=14115497

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62094627A Expired - Lifetime JPH0788041B2 (en) 1987-04-17 1987-04-17 How to connect the plastic pipe

Country Status (1)

Country Link
JP (1) JPH0788041B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015034594A (en) * 2013-08-08 2015-02-19 積水化学工業株式会社 Joint and construction method of piping structure

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH673619A5 (en) * 1987-08-28 1990-03-30 Fischer Ag Georg
DE4428767C2 (en) * 1994-08-13 1996-09-05 Rehau Ag & Co Process for welding pipe sleeves
US6900417B2 (en) * 2001-09-06 2005-05-31 Sealand Technology, Inc. Hose heater
JP2013028081A (en) * 2011-07-28 2013-02-07 Techno Furekkusu:Kk Iron for heating connection end of three-layer pipe and pipe joint, heating device that uses the iron and heating method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015034594A (en) * 2013-08-08 2015-02-19 積水化学工業株式会社 Joint and construction method of piping structure

Also Published As

Publication number Publication date
JPS63260429A (en) 1988-10-27

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