JP3258369B2 - Pipe joint connection device with built-in heating wire - Google Patents

Pipe joint connection device with built-in heating wire

Info

Publication number
JP3258369B2
JP3258369B2 JP11497192A JP11497192A JP3258369B2 JP 3258369 B2 JP3258369 B2 JP 3258369B2 JP 11497192 A JP11497192 A JP 11497192A JP 11497192 A JP11497192 A JP 11497192A JP 3258369 B2 JP3258369 B2 JP 3258369B2
Authority
JP
Japan
Prior art keywords
synthetic resin
peripheral surface
heating wire
pipe
inner peripheral
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 - Fee Related
Application number
JP11497192A
Other languages
Japanese (ja)
Other versions
JPH05306794A (en
Inventor
忠雄 安藤
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.)
Mitsubishi Plastics Inc
Original Assignee
Mitsubishi Plastics Inc
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 Mitsubishi Plastics Inc filed Critical Mitsubishi Plastics Inc
Priority to JP11497192A priority Critical patent/JP3258369B2/en
Publication of JPH05306794A publication Critical patent/JPH05306794A/en
Application granted granted Critical
Publication of JP3258369B2 publication Critical patent/JP3258369B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • 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
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • B29C65/58—Snap connection
    • 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
    • B29C65/7802—Positioning the parts to be joined, e.g. aligning, indexing or centring
    • 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
    • B29C66/01—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
    • B29C66/50—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
    • 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
    • B29C66/52297—Joining tubular articles involving the use of a socket said socket comprising slip-off prevention means
    • 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
    • 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 provide a device for connecting a pipe joint with a built-in heating wire, which can perform the piping easily and securely. CONSTITUTION:Heating 12 are embedded in the inner peripheral surface of a socket 11, which is provided in one end of a pipe joint 1, spirally with a predetermined space, and the end of a synthetic resin tube 2 is inserted into the socket 11. A projecting part 13a provided in the inner peripheral surface of the socket 11 and a recessed part 13b provided in the outer peripheral surface of the end of the synthetic resin pipe 2 are engaged with each other to prevent the fall-off of the synthetic resin pipe 2, and the heating wires 12 generate to perform the melting joint of the inner peripheral surface of the socket 11 to the outer peripheral surface of the end of the synthetic resin pipe 2. The piping can be thereby facilitated, and the melting joint is performed securely and strongly without fall-off of the synthetic resin pipe from the socket of the pipe joint.

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、電熱線を内蔵した管継
手に合成樹脂管を確実、かつ強固に融着接合できる接続
装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting device capable of securely and strongly fusing a synthetic resin pipe to a pipe joint containing a heating wire.

【０００２】[0002]

【従来の技術】従来からガス管等の配管分野では、図２
に部分断面図で示した如く、受口１１の内周面に電熱線
１２を埋設した管継手１を用いて合成樹脂管２を融着接
合することが行われている。2. Description of the Related Art Conventionally, in the field of piping such as gas pipes, FIG.
As shown in the partial sectional view of FIG. 1, a synthetic resin pipe 2 is fusion-bonded using a pipe joint 1 in which a heating wire 12 is embedded in an inner peripheral surface of a receiving port 11.

【０００３】ところで、管継手１に合成樹脂管２を融着
接合する場合、管継手１の受口１１内に合成樹脂管２の
端部を嵌挿してから電熱線１２を発熱させて受口１１の
内周面と合成樹脂管２の端部外周面とを同時に溶融させ
たときに、該溶融樹脂の圧力が高まって受口１１内から
合成樹脂管２が押し出されて脱出するという問題が起き
る。このため、従来は管継手１の受口１１内に合成樹脂
管２の端部を嵌挿してからそれぞれの合成樹脂管２をク
ランプＣで把持し、受口１１内から合成樹脂管２が脱出
するのを防止しながら電熱線１２を発熱させて融着接合
していた。[0003] When the synthetic resin pipe 2 is fusion-bonded to the pipe joint 1, the end of the synthetic resin pipe 2 is inserted into the receptacle 11 of the pipe joint 1, and then the heating wire 12 is heated to generate heat. When the inner peripheral surface of the resin tube 11 and the outer peripheral surface of the end portion of the synthetic resin tube 2 are simultaneously melted, the pressure of the molten resin increases and the synthetic resin tube 2 is pushed out from the receiving port 11 and escapes. Get up. For this reason, conventionally, the end of the synthetic resin pipe 2 is inserted into the socket 11 of the pipe joint 1 and then each synthetic resin pipe 2 is gripped with the clamp C, and the synthetic resin pipe 2 escapes from the socket 11. In this case, the heating wire 12 is caused to generate heat while performing fusion bonding.

【０００４】[0004]

【発明が解決しようとする課題】しかしながら、現場で
の配管施工の際に、それぞれの合成樹脂管２をクランプ
Ｃで把持したり、取り外したりする作業が非常に面倒で
あった。また、施工時間の短縮を図るために溶融樹脂が
十分に固化していない間に配管施工業者がクランプＣを
取り外してしまうことがあるため、受口１１内から合成
樹脂管２が押し出されて接続不良が発生するという問題
があった。However, the work of grasping and removing each synthetic resin pipe 2 with the clamp C during piping work on site is very troublesome. In addition, since the plumbing contractor may remove the clamp C while the molten resin is not sufficiently solidified in order to shorten the construction time, the synthetic resin pipe 2 is pushed out from the receiving port 11 and connected. There was a problem that defects occurred.

【０００５】本発明はかかる課題を解決したものであっ
て、配管施工が簡単に行なえると共に、管継手と合成樹
脂管とを確実かつ強固に融着接合できる接続装置を提供
するものである。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a connecting device which can easily perform piping work and can surely and firmly fusion-bond a pipe joint and a synthetic resin pipe.

【０００６】[0006]

【課題を解決するための手段】本発明は、管継手１の一
端部に設けた受口１１の内周面に電熱線１２を所定間隔
で螺旋状に埋設し、該受口１１内に合成樹脂管２の端部
を嵌挿してから前記電熱線１２を発熱させて受口１１の
内周面と合成樹脂管２の端部外周面とを溶融させて融着
接合する電熱線１２を内蔵した管継手であって、電熱線
１２が埋設されていない受口奥部の内周面に受口の開口
側から奥側に向かって内径が除々に小さくなる傾斜面と
この傾斜面の奥側に引っ掛り段部を有する環状凸起３ａ
を設け、また合成樹脂管２の先端部外周面に前記環状凸
起３ａが嵌入すると共に、該環状凸起３ａの引っ掛り段
部と係合する段部を有する環状凹溝３ｂを設けたことを
特徴とするものである。According to the present invention, a heating wire 12 is helically embedded at a predetermined interval on an inner peripheral surface of a receiving port 11 provided at one end of a pipe joint 1 and is synthesized in the receiving port 11. After the end of the resin tube 2 is inserted, the heating wire 12 is heated and
The inner peripheral surface and the outer peripheral surface of the end of the synthetic resin tube 2 are fused and fused.
A pipe fitting having a built-in heating wire 12 to be joined,
The opening of the receiving port on the inner peripheral surface at the back of the receiving port where 12 is not buried
With an inclined surface whose inside diameter gradually decreases from the side to the back side
An annular protrusion 3a having a hooked step on the back side of the inclined surface
Is provided on the outer peripheral surface of the distal end portion of the synthetic resin tube 2.
The protrusion 3a fits in and the hooking step of the annular protrusion 3a
An annular groove 3b having a stepped portion for engaging with the portion is provided .

【０００７】[0007]

【作用】受口内に合成樹脂管の端部を嵌挿したとき、該
受口奥部の内周面に設けた環状凸起が合成樹脂管の先端
部外周面に設けた環状凹溝に嵌入し、該環状凸起の引っ
掛り段部が環状凹溝の段部と係合して合成樹脂管の抜け
出しが防止される。この ため、電熱線を発熱させて受口
の内周面と合成樹脂管の端部外周面とを同時に溶融させ
たとき、該溶融樹脂の圧力が高まって合成樹脂管に押出
力が作用しても受口内から脱出することがなく、受口の
内周面と合成樹脂管の端部外周面とが強固に融着接合す
る。 When the end of the synthetic resin tube is inserted into the socket ,
An annular protrusion provided on the inner peripheral surface at the back of the socket is the tip of the synthetic resin tube
Into the annular groove provided on the outer peripheral surface of the
The hanging step engages with the step of the annular groove to pull out the synthetic resin tube.
Dispensing is prevented. For this reason, the heating wire generates heat and
Simultaneously melt the inner peripheral surface of the
When the pressure of the molten resin increases, it is extruded into a synthetic resin tube.
Even if force is applied, it does not escape from the receptacle,
The inner peripheral surface and the outer peripheral surface of the end of the synthetic resin tube are firmly fusion bonded.
You.

【０００８】[0008]

【実施例】以下、本発明の実施例を図面にて詳細に説明
する。図１は本発明の一実施例を示す接続装置の要部断
面図である。Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a sectional view of a main part of a connection device showing one embodiment of the present invention.

【０００９】図中１はポリエチレン、ポリプロピレン、
ポリブテン等の合成樹脂からなる管継手、２は管継手１
と同種の樹脂からなる合成樹脂管である。管継手１の一
端部には合成樹脂管２の外径とほぼ等しい内径を有する
受口１１が設けられており、該受口１１の内周面に電熱
線１２が所定間隔で螺旋状に埋設されている。一方、受
口１１の外周面には電源接続端子１３を内蔵したコネク
ター１４が設けられており、該電源接続端子１３に前記
電熱線１２の両端部が接続している。１５は受口１１の
奥部に設けたストッパー段部である。In the figure, reference numeral 1 denotes polyethylene, polypropylene,
Pipe fitting made of synthetic resin such as polybutene, 2 is pipe fitting 1
And a synthetic resin tube made of the same kind of resin. A receiving port 11 having an inner diameter substantially equal to the outer diameter of the synthetic resin pipe 2 is provided at one end of the pipe joint 1, and a heating wire 12 is helically embedded at a predetermined interval in an inner peripheral surface of the receiving port 11. Have been. On the other hand, a connector 14 containing a power supply connection terminal 13 is provided on the outer peripheral surface of the receptacle 11, and both ends of the heating wire 12 are connected to the power supply connection terminal 13. Reference numeral 15 denotes a stopper step provided at the back of the receiving port 11.

【００１０】管継手１の受口１１の奥側の内周面、即ち
電熱線１２が埋設されていない受口奥部の内周面には受
口１１の開口側から奥側に向かって内径が除々に小さく
なる傾斜面と、この傾斜面の奥側に引っ掛り段部を有す
る環状凸起３ａが設けられている。また、合成樹脂管２
の先端部外周面には前記環状凸起３ａが嵌入すると共
に、該環状凸起３ａの引っ掛り段部と係合する段部を管
の先端側に有する環状凹溝３ｂが設けられている。 [0010] The inner peripheral surface on the back side of the receiving port 11 of the pipe joint 1, ie,
On the inner peripheral surface at the back of the port where the heating wire 12 is not buried,
The inside diameter gradually decreases from the opening side of the mouth 11 to the back side.
Has an inclined surface, and a stepped portion on the back side of the inclined surface.
An annular protrusion 3a is provided. In addition, synthetic resin pipe 2
When the annular protrusion 3a is fitted on the outer peripheral surface of the tip of
In addition, a step engaging with the hooking step of the annular protrusion 3a is connected to a tube.
Is provided with an annular concave groove 3b provided on the tip side.

【００１１】従って、この管継手１の受口１１内に合成
樹脂管２の端部を嵌挿してその先端部をストッパー段部
１５に当接させると、受口１１の奥部内周面に設けた環
状凸起３ａが合成樹脂管２の先端部外周面に設けた環状
凹溝３ｂ内に嵌入すると共に環状凸起３ａの引っ掛り段
部が環状凹溝３ｂの段部に係合して合成樹脂管２の抜け
出しが防止される。このとき、合成樹脂管２の先端部に
テーパ状の面取り２１を施すと共に、環状凹溝３ｂより
先端側の凸部に管軸方向の溝２２を設けておくか、また
は受口１１の内周面に設けた環状凸起３ａに管軸方向の
溝を設けておくと、合成樹脂管２の端部を受口１１の奥
部まで容易に嵌挿させることができる。 Accordingly, when the end of the synthetic resin pipe 2 is inserted into the socket 11 of the pipe joint 1 and the tip of the synthetic resin pipe 2 is brought into contact with the stopper step 15, the end is provided on the inner peripheral surface of the back of the socket 11. annular protrusion 3a is caught stage annular protrusion 3a while fitted into the annular groove 3b provided above end outer peripheral surface of the synthetic resin pipe 2
The portion is engaged with the step of the annular concave groove 3b to prevent the synthetic resin tube 2 from coming off. At this time, a tapered chamfer 21 is applied to the distal end of the synthetic resin pipe 2, and a groove 22 in the axial direction of the pipe is provided in a convex portion on the distal end side from the annular concave groove 3 b, or the inner circumference of the receiving port 11 is formed. By providing a groove in the tube axis direction in the annular protrusion 3a provided on the surface, the end of the synthetic resin tube 2 can be easily fitted to the inner part of the receiving port 11.

【００１２】そこで、コネクター１４の電源接続端子１
３に電力線を接続し、電熱線１２に所定時間電流を流す
と、電熱線１２が発熱して受口１１の内周面と合成樹脂
管２の端部外周面とが同時に溶融する。このとき、溶融
樹脂の圧力が高まって合成樹脂管２を受口１１から押し
出そうとする力が発生するが、該受口奥部の内周面に設
けた環状凸起３ａが合成樹脂管２の先端部外周面に設け
た環状凹溝３ｂに嵌入し、該環状凸起３ａの引っ掛り段
部が環状凹溝３ｂの段部と係合して合成樹脂管２の抜け
出しが防止されるため、受口の内周面と合成樹脂管の端
部外周面とが強固に融着接合する。 Therefore, the power supply connection terminal 1 of the connector 14
3 is connected to a power line, and a current flows through the heating wire 12 for a predetermined time.
Then, the heating wire 12 generates heat and the inner peripheral surface of the receptacle 11 and the outer peripheral surface of the end of the synthetic resin tube 2 are simultaneously melted. At this time, melting
When the pressure of the resin increases, the synthetic resin tube 2 is pushed from the receiving port 11.
A force is generated, but it is installed on the inner peripheral surface
An annular protrusion 3a is provided on the outer peripheral surface of the distal end portion of the synthetic resin tube 2.
Into which the annular protrusion 3a fits.
Part is engaged with the step of the annular groove 3b, and the synthetic resin pipe 2 comes off.
The inner peripheral surface of the receptacle and the end of the synthetic resin tube are
The outer peripheral surface is firmly fusion bonded.

【００１３】[0013]

【発明の効果】以上詳述した如く、本発明の接続装置は
管継手の受口内に合成樹脂管の端部を押し込むという簡
単な操作を行うだけで、受口奥部の内周面に設けた環状
凸起が合成樹脂管の先端部外周面に設けた環状凹溝に嵌
入し、該環状凸起の引っ掛り段部が環状凹溝の段部と係
合して合成樹脂管の抜け出しが確実に防止される。この
ため、電熱線を発熱させて受口の内周面と合成樹脂管の
端部外周面とを溶融させたときに、受口内から合成樹脂
管が押し出されて脱出することがなく、管継手と合成樹
脂管とが確実かつ強固に融着接合する。また、本発明の
接続装置はクランプによる固定、および取り外し操作が
必要でないので、従来装置と比較して施工時間を大幅に
短縮することができる。As described in detail above, the connecting device of the present invention is simple in that the end of the synthetic resin pipe is pushed into the socket of the pipe joint.
By simply performing a simple operation, the ring provided on the inner peripheral surface
The protrusion fits into the annular groove provided on the outer peripheral surface of the tip of the synthetic resin tube.
And the catching step of the annular protrusion engages with the step of the annular groove.
In addition, the synthetic resin tube is reliably prevented from coming off. this
Therefore , when the heating wire is heated to melt the inner peripheral surface of the receiving port and the outer peripheral surface of the end of the synthetic resin pipe, the synthetic resin pipe is not pushed out from the receiving port and escapes, and the pipe joint and A reliable and strong fusion bonding with the synthetic resin tube. Further, since the connecting device of the present invention does not require fixing and removing operations by a clamp, the construction time can be significantly reduced as compared with the conventional device.

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

【図１】図１は本発明の一実施例を示す接続装置の要部
断面図である。FIG. 1 is a sectional view of a main part of a connection device showing one embodiment of the present invention.

【図２】図２は従来例を示す部分断面図である。FIG. 2 is a partial sectional view showing a conventional example.

【符号の説明】[Explanation of symbols]

１ 管継手 ２ 合成樹脂管 １１ 受口 １２ 電熱線 ３ａ 環状凸起 ３ｂ 環状凹溝 DESCRIPTION OF SYMBOLS 1 Pipe joint 2 Synthetic resin pipe 11 Reception port 12 Heating wire 3a Annular protrusion 3b Annular groove

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 管継手（１）の一端部に設けた受口（１
１）の内周面に電熱線（１２）を所定間隔で螺旋状に埋
設し、該受口（１１）内に合成樹脂管（２）の端部を嵌
挿してから前記電熱線（１２）を発熱させて受口（１
１）の内周面と合成樹脂管（２）の端部外周面とを溶融
させて融着接合する電熱線（１２）を内蔵した管継手で
あって、電熱線（１２）が埋設されていない受口奥部の
内周面に受口の開口側から奥側に向かって内径が除々に
小さくなる傾斜面とこの傾斜面の奥側に引っ掛り段部を
有する環状凸起（３ａ）を設け、また合成樹脂管（２）
の先端部外周面に前記環状凸起（３ａ）が嵌入すると共
に、該環状凸起（３ａ）の引っ掛り段部と係合する段部
を有する環状凹溝（３ｂ）を設けたことを特徴とする電
熱線を内蔵した管継手の接続装置。A socket (1) provided at one end of a pipe joint (1).
A heating wire (12) is helically embedded at a predetermined interval on the inner peripheral surface of 1), and an end of a synthetic resin pipe (2) is inserted into the receiving port (11), and then the heating wire (12) is inserted. To generate heat and
Melting the inner peripheral surface of 1) and the outer peripheral surface of the end of the synthetic resin pipe (2)
With a built-in heating wire (12) for fusion bonding
There is no heating wire (12)
The inner diameter gradually increases from the opening side of the receptacle to the inner side on the inner peripheral surface.
A slope that becomes smaller and a hook
A ring-shaped protrusion (3a), and a synthetic resin pipe (2).
When the annular protrusion (3a) fits into the outer peripheral surface of the tip of
A step which engages with a hooking step of the annular protrusion (3a).
A pipe joint connecting device having a built-in heating wire , wherein an annular concave groove (3b) having:
JP11497192A 1992-05-07 1992-05-07 Pipe joint connection device with built-in heating wire Expired - Fee Related JP3258369B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11497192A JP3258369B2 (en) 1992-05-07 1992-05-07 Pipe joint connection device with built-in heating wire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11497192A JP3258369B2 (en) 1992-05-07 1992-05-07 Pipe joint connection device with built-in heating wire

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP2001288696A Division JP2002188787A (en) 2001-09-21 2001-09-21 Connecting device for pipe joint with built-in heating wire

Publications (2)

Publication Number Publication Date
JPH05306794A JPH05306794A (en) 1993-11-19
JP3258369B2 true JP3258369B2 (en) 2002-02-18

Family

ID=14651163

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11497192A Expired - Fee Related JP3258369B2 (en) 1992-05-07 1992-05-07 Pipe joint connection device with built-in heating wire

Country Status (1)

Country Link
JP (1) JP3258369B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2813349B1 (en) * 2013-06-11 2017-03-15 Stang GmbH Pipe joint for thermoplastic plastic pipes

Also Published As

Publication number Publication date
JPH05306794A (en) 1993-11-19

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