JPH06185688A - Heating plate - Google Patents

Heating plate

Info

Publication number
JPH06185688A
JPH06185688A JP4336938A JP33693892A JPH06185688A JP H06185688 A JPH06185688 A JP H06185688A JP 4336938 A JP4336938 A JP 4336938A JP 33693892 A JP33693892 A JP 33693892A JP H06185688 A JPH06185688 A JP H06185688A
Authority
JP
Japan
Prior art keywords
heating wire
plate
heating
joint
pin
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
JP4336938A
Other languages
Japanese (ja)
Inventor
Hideo Nozaki
日出男 野崎
Takeshi Kato
健 加藤
Nobuhiro Nishikata
伸広 西方
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.)
Proterial Ltd
Original Assignee
Hitachi Metals 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 Hitachi Metals Ltd filed Critical Hitachi Metals Ltd
Priority to JP4336938A priority Critical patent/JPH06185688A/en
Publication of JPH06185688A publication Critical patent/JPH06185688A/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
    • B29C65/34—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
    • 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
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L53/00—Heating of pipes or pipe systems; Cooling of pipes or pipe systems
    • F16L53/30—Heating of pipes or pipe systems
    • F16L53/35—Ohmic-resistance heating
    • 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
    • B29C66/50—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Pipe Accessories (AREA)
  • Resistance Heating (AREA)

Abstract

PURPOSE:To provide a heating plate in which heating wires do not short-circuit with each other even during energization with a pipe for welding. CONSTITUTION:In a heating plate which is embedded in the inner surface of a joint and which is adapted to be used integrally incorporated with the joint, a spiral part in which a heating wire 2 is fitted and secured is formed on one side surface of the plate 1 made of thermoplastic resin, and the heating wire 2 is fixed thereto while pins 15, 16 are fixed to the outer periphery thereof, end parts of the heating wire 2 being connected to the pins 15, 16. Parts of the heating wire 2 in the vicinity of the ends thereof, are covered with insulation tubes 3, 4 which are not melted at the melting point of the plate 1.

Description

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

【０００１】[0001]

【産業上の利用分野】本発明は合成樹脂製のガス管や水
道管等の管路の途中に溶着接合する合成樹脂製の分岐溶
着継手に一体的に埋設する加熱用プレートに関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating plate which is integrally embedded in a branch welding joint made of synthetic resin which is welded and joined in the middle of a conduit such as a gas pipe or a water pipe made of synthetic resin.

【０００２】[0002]

【従来の技術】従来、分岐溶着継手に用いる加熱用プレ
ートとしては例えば、特開昭５８−６５６２４号公報で
開示されている。このものは、合成樹脂製のプレートに
渦巻き状の溝を設け、この溝内に電熱線を埋設装着し
て、渦巻き溝を横断する部分は上記プレートを折り曲げ
た上に電熱線を横断させて短絡を防止したものである。
また実開平４−１１０２９６号公報では、渦巻き溝を横
断する部分の電熱線に合成樹脂製プレートと同じ材質の
合成樹脂製絶縁チューブを被せた技術が開示されてい
る。2. Description of the Related Art Conventionally, a heating plate used for a branch welding joint is disclosed in, for example, Japanese Patent Application Laid-Open No. 58-65624. In this product, a spiral groove is provided on a synthetic resin plate, and heating wires are embedded in the groove, and the portion that crosses the spiral groove is shorted by bending the plate and then crossing the heating wire. Is to prevent.
Further, Japanese Utility Model Laid-Open No. 4-110296 discloses a technique in which a heating wire in a portion which crosses a spiral groove is covered with a synthetic resin insulating tube made of the same material as a synthetic resin plate.

【０００３】[0003]

【発明が解決しようとする課題】このような従来の加熱
用プレートにあっては、電熱線に通電前の状態におい
て、電熱線が渦巻き溝内に装着されており、渦巻き溝を
横断する部分についてもプレートの介在によって絶縁さ
れているので何の問題もない。しかし管との通電溶着時
においては、電熱線の加熱によって加熱されたプレート
を含む継手内面の樹脂が溶融して体積膨張し、溶融樹脂
が管の表面との隙間部分に広がろうとする現象が生じ
る。このため渦巻き溝内の電熱線、特に内周側の電熱線
が溶融樹脂と共に外周側に移動して渦巻き溝外周側のピ
ント係止した電熱線と接触して通電中に短絡を起こす問
題がある。従って電熱線の渦巻き溝の横断部にプレート
と同じ材質の樹脂製絶縁チューブを被せてあっても通電
中にこの絶縁チューブが溶融するので電熱線同志が短絡
する。In such a conventional heating plate, the heating wire is mounted in the spiral groove before the heating wire is energized, and the portion crossing the spiral groove is Also, there is no problem because it is insulated by the interposition of the plate. However, at the time of current welding with the pipe, there is a phenomenon in which the resin on the inner surface of the joint including the plate heated by the heating of the heating wire melts and expands in volume, and the molten resin tries to spread in the gap between the surface of the pipe and the pipe. Occurs. Therefore, there is a problem that the heating wire inside the spiral groove, especially the heating wire on the inner peripheral side moves to the outer peripheral side together with the molten resin and comes into contact with the focused heating wire on the outer peripheral side of the spiral groove to cause a short circuit during energization. . Therefore, even if a resin insulation tube made of the same material as the plate is placed on the crossing portion of the spiral groove of the heating wire, the insulation tube is melted during energization, so that the heating wires are short-circuited.

【０００４】この問題は電熱線の巻き初めあるいは巻き
終わりの端部をピンと接続してあり、ピンは溶融しない
継手の表面から突出して係止されているので、ピンに接
続した電熱線の端部が移動せず、端部付近の電熱線が移
動してきた内周側の電熱線と重なり短絡する。この問題
は通電溶着中に初めて判る問題であって、加熱プレート
と同じ材質の絶縁材を用いても、通電中に溶融するので
問題が解消しない。通電時に短絡が生じると周辺の樹脂
が過度に加熱されて溶着不良の原因となる。本発明は、
上記の問題を解消し、管との通電溶着中においても電熱
線同志が短絡しない加熱用プレートを提供することを目
的とするものである。The problem is that the end of the heating wire at the beginning or end of the heating wire is connected to the pin, and the end of the heating wire connected to the pin is locked because the pin projects and is locked from the surface of the unmelting joint. Does not move, and the heating wire near the end overlaps with the moving heating wire on the inner circumference side and short-circuits. This problem cannot be solved for the first time during current welding, and even if an insulating material made of the same material as that of the heating plate is used, it melts during current application and cannot be solved. If a short circuit occurs during energization, the surrounding resin will be excessively heated and cause defective welding. The present invention is
It is an object of the present invention to solve the above problems and provide a heating plate in which heating wires do not short-circuit even during electric welding with a tube.

【０００５】[0005]

【課題を解決するための手段】上記の目的を達成するた
めに本発明の加熱用プレートは、継手の内面に埋設して
継手と一体化して用いられる加熱用プレートであって、
熱可塑性樹脂を素材とするプレートの片面側に電熱線を
装着固定する渦巻き部を設けて電熱線を固定すると共に
その外側にピンを固定し、前記電熱線の端部がピンと接
続してある加熱用プレートにおいて、前記電熱線の端部
付近に前記プレートの溶融温度で溶融しない絶縁性チュ
ーブを被せたことを特徴とするものである。In order to achieve the above object, the heating plate of the present invention is a heating plate which is embedded in the inner surface of a joint and is used integrally with the joint.
A plate made of a thermoplastic resin is provided with a spiral part for mounting and fixing a heating wire on one side of the plate to fix the heating wire and to fix a pin to the outside, and the end of the heating wire is connected to the pin. In the plate for application, an insulating tube that does not melt at the melting temperature of the plate is covered near the end of the heating wire.

【０００６】[0006]

【作用】本発明の加熱用プレートでは、分岐溶着継手の
サドル部の内周面に埋設して使用される。そして上記の
ごとくピンと接続した電熱線の巻き初めあるいは巻き終
わりの端部に樹脂製プレートの溶融温度で溶融しない絶
縁性のチューブを被せてある。上記電熱線と接続したピ
ンは継手の外面から突出して設けてあり、この突出した
ピンに別のコントローラからの電流を通電してプレート
に装着した電熱線を加熱させ、サドルの内周面に密着固
定した熱可塑性の管と一体に溶着する。この通電の際、
継手と管が動かないように固定されており、上記通電中
の加熱によってサドルの内面が加熱され、加熱部分の樹
脂が溶融して体積膨張を越し、溶融樹脂が管表面との隙
間部分に広がろうとする現象を生じる。The heating plate of the present invention is used by being embedded in the inner peripheral surface of the saddle portion of the branch welding joint. Then, as described above, the end of the beginning or end of winding of the heating wire connected to the pin is covered with an insulating tube that does not melt at the melting temperature of the resin plate. The pin connected to the above heating wire is provided so as to project from the outer surface of the joint, and a current from another controller is applied to this protruding pin to heat the heating wire mounted on the plate and to adhere to the inner surface of the saddle. It is welded together with a fixed thermoplastic tube. During this energization,
The joint and the pipe are fixed so that they do not move.The inner surface of the saddle is heated by the above heating during energization, the resin in the heated part melts and exceeds the volume expansion, and the molten resin spreads in the gap between the pipe surface and the surface. The phenomenon of trying to get up occurs.

【０００７】このため、継手の内面側に埋設された樹脂
プレートの電熱線も溶融樹脂と一体で渦巻き溝の外周側
に移動する。しかしピンは溶融しない継手の表面から突
出して係止されており、ピンに接続した電熱線端部が移
動しないので端部付近の電熱線が移動してきた内周側の
電熱線と重なる。本発明では、継手を通電溶着中に継手
の溶融樹脂が膨張して渦巻き部内周側の電熱線が外周側
に移動しても、ピンに接続した電熱線の端部付近に溶融
しない絶縁性のチューブを被せてあるので、絶縁状態が
維持され短絡しない。Therefore, the heating wire of the resin plate buried on the inner surface side of the joint also moves to the outer peripheral side of the spiral groove together with the molten resin. However, the pin is projected and locked from the surface of the unmelted joint, and since the end of the heating wire connected to the pin does not move, the heating wire near the end overlaps with the moving heating wire on the inner circumference side. In the present invention, even if the molten resin of the joint expands and the heating wire on the inner circumference side of the spiral portion moves to the outer circumference side during current welding of the fitting, it does not melt near the end of the heating wire connected to the pin. Since it is covered with a tube, the insulation is maintained and no short circuit occurs.

【０００８】[0008]

【実施例】以下本発明の実施例を図面に基づいて説明す
る。図１は実施例の加熱用プレートを示す平面図であ
る。樹脂プレート１はポリエチレン等の熱可塑性樹脂を
素材として大略方形状に形成されている。この樹脂プレ
ート１の中央部には孔１１を設けてある。この樹脂プレ
ート１の片面側に全体に亘って孔１１を取り巻く渦巻き
溝１２を形成してある。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing a heating plate of the embodiment. The resin plate 1 is made of a thermoplastic resin such as polyethylene and has a generally rectangular shape. A hole 11 is provided at the center of the resin plate 1. A spiral groove 12 surrounding the hole 11 is formed on one side of the resin plate 1 as a whole.

【０００８】この渦巻き溝１２の内部に加熱要素となる
電熱線２を装着して固定してあり、一端部は渦巻き溝１
２の外周端からプレート１の孔に差し込んで固定された
ピン１５に接続され、他端部は渦巻き溝１２の内周端か
ら渦巻き溝１２を横断して引き出され、プレート１の外
周端に固定されたもう一方のピン１６に接続してある。
尚、プレート１はポリエチレンの他ポリブテンを用いて
も良い。電熱線２は鉄クロム、銅ニッケル、ニクロム等
の抵抗加熱用電熱線である。A heating wire 2 serving as a heating element is mounted and fixed inside the spiral groove 12, and one end portion thereof has a spiral groove 1.
2 is connected to the pin 15 fixed by being inserted into the hole of the plate 1 from the outer peripheral end, and the other end is pulled out from the inner peripheral end of the spiral groove 12 across the spiral groove 12 and fixed to the outer peripheral end of the plate 1. It is connected to the other pin 16 which is connected.
The plate 1 may use polybutene instead of polyethylene. The heating wire 2 is a resistance heating heating wire made of iron chromium, copper nickel, nichrome, or the like.

【０００９】絶縁性チューブ３は樹脂プレート１に固定
したピン１５と電熱線２の一端を接続して電熱線２を渦
巻き溝１２内に挿入するまでの巻き始め部分に被せてあ
る。もう一方の絶縁性チューブ４は、同じ樹脂プレート
１に固定したピン１６と電熱線の他端を接続して電熱線
が渦巻き溝１２を横断し渦巻き溝１２内に挿入するまで
の巻き終わり部分に被せてある。この絶縁性チューブ３
はガラス繊維を編んで円筒形状に形成し外面にフッ素樹
脂をコーテングしたもので、耐熱性があり樹脂プレート
１の溶融温度で溶融することがない。電熱線２を巻き始
める前に絶縁性チューブ３を通して端部に装着しても良
く、またチューブ３に軸方向のスリットを設けておき、
プレートに電熱線を巻いた後で端部に被せても良い。The insulating tube 3 is connected to the pin 15 fixed to the resin plate 1 and one end of the heating wire 2 and is covered on the winding start portion until the heating wire 2 is inserted into the spiral groove 12. The other insulating tube 4 connects the pin 16 fixed to the same resin plate 1 and the other end of the heating wire to the winding end portion until the heating wire crosses the spiral groove 12 and is inserted into the spiral groove 12. It is covered. This insulating tube 3
Is a glass fiber knitted into a cylindrical shape and coated with a fluororesin on the outer surface, which has heat resistance and does not melt at the melting temperature of the resin plate 1. Before starting the heating wire 2, it may be attached to the end through the insulating tube 3, and the tube 3 may be provided with an axial slit.
The plate may be wrapped with a heating wire and then covered at the end.

【００１０】図２は分岐溶着継手４０を示す断面図で、
本実施例の加熱用プレート１はこの分岐溶着継手のサド
ル部４１の内周部に一体に埋設して使用される。そして
上記電熱線２と接続したピン１５、１６は継手４０の外
面から突出しており、ピン１５、１６に別のコントロー
ラからの電流を通電して加熱用プレート１に装着した電
熱線２を加熱させ、熱可塑性の管５と一体に溶着する。FIG. 2 is a sectional view showing a branch welding joint 40.
The heating plate 1 of this embodiment is used by being integrally embedded in the inner peripheral portion of the saddle portion 41 of this branch welding joint. The pins 15 and 16 connected to the heating wire 2 project from the outer surface of the joint 40, and current is supplied to the pins 15 and 16 from another controller to heat the heating wire 2 mounted on the heating plate 1. , Welded integrally with the thermoplastic tube 5.

【００１１】この通電の際、継手４０と管５が動かない
ように固定してあり、通電中の加熱によって継手４０の
内面が加熱され、継手内面の樹脂が溶融し、溶融した樹
脂は体積膨張して管５との間に広がり管５の表面が溶融
して継手４０と管５が一体に溶着する。この際、電熱線
２も溶融した樹脂と共に渦巻き溝の外周側に移動する。
しかしピン１５あるいはピン１６と接続してある電熱線
２の端部付近には絶縁性のチューブ３、４を被せてある
ので、電熱線同志が重なっても溶融しない絶縁性チュー
ブ３、４によって短絡することがない。During this energization, the joint 40 and the pipe 5 are fixed so as not to move, the inner surface of the joint 40 is heated by heating during energization, the resin on the inner surface of the joint is melted, and the melted resin is expanded in volume. Then, it spreads between the pipe 5 and the surface of the pipe 5, and the joint 40 and the pipe 5 are welded together. At this time, the heating wire 2 also moves to the outer peripheral side of the spiral groove together with the molten resin.
However, since the insulating tubes 3 and 4 are covered in the vicinity of the ends of the heating wire 2 connected to the pin 15 or the pin 16, the insulating tubes 3 and 4 that do not melt even if the heating wires overlap each other are short-circuited. There is nothing to do.

【００１２】[0012]

【発明の効果】以上説明のごとく本発明の加熱用プレー
トは、電熱線に通電溶着中において問題であった電熱線
同志の短絡がなくなり、管との良好な溶着接続が行える
ものである。As described above, the heating plate of the present invention eliminates the problem of short-circuiting between the heating wires, which was a problem during energization welding of the heating wires, and enables good welding connection with the tube.

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

【図１】 本発明の実施例を示す加熱用プレートの平面
図である。FIG. 1 is a plan view of a heating plate showing an embodiment of the present invention.

【図２】 図１のＡ−Ａ断面図である。FIG. 2 is a sectional view taken along line AA of FIG.

【図３】 本発明の加熱用プレートを用いた分岐溶着継
手を示す断面図である。FIG. 3 is a sectional view showing a branch welding joint using the heating plate of the present invention.

【符号の説明】[Explanation of symbols]

１ 樹脂プレート ２ 電熱線 ３ 絶縁性チューブ ４ 絶縁性チューブ ５ 熱可塑性の管 １１ 孔 １２ 渦巻き溝 １３ 樹脂 １５、１６ ピン ４０ 分岐溶着継手 ４１ サドル部 DESCRIPTION OF SYMBOLS 1 Resin plate 2 Heating wire 3 Insulating tube 4 Insulating tube 5 Thermoplastic tube 11 Hole 12 Spiral groove 13 Resin 15, 16 pin 40 Branch welding joint 41 Saddle part

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 継手の内面に埋設して継手と一体化して
用いられる加熱用プレートであって、熱可塑性樹脂を素
材とするプレートの片面側に電熱線を装着固定する渦巻
き部を設けて電熱線を固定すると共にその外側にピンを
固定し、前記電熱線の端部がピンと接続してある加熱用
プレートにおいて、 前記電熱線の端部付近に前記プレートの溶融温度で溶融
しない絶縁性チューブを被せたことを特徴とする加熱用
プレート。1. A heating plate embedded in an inner surface of a joint and used integrally with the joint, wherein a spiral part for mounting and fixing a heating wire is provided on one side of a plate made of a thermoplastic resin. Fixing the heating wire and fixing the pin to the outside thereof, in a heating plate in which the end of the heating wire is connected to the pin, an insulating tube that does not melt at the melting temperature of the plate near the end of the heating wire. A heating plate characterized by being covered.
JP4336938A 1992-12-17 1992-12-17 Heating plate Pending JPH06185688A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4336938A JPH06185688A (en) 1992-12-17 1992-12-17 Heating plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4336938A JPH06185688A (en) 1992-12-17 1992-12-17 Heating plate

Publications (1)

Publication Number Publication Date
JPH06185688A true JPH06185688A (en) 1994-07-08

Family

ID=18304021

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4336938A Pending JPH06185688A (en) 1992-12-17 1992-12-17 Heating plate

Country Status (1)

Country Link
JP (1) JPH06185688A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011089599A (en) * 2009-10-23 2011-05-06 Mitsui Kagaku Sanshi Kk Electric heating mat
JP2022088842A (en) * 2020-12-03 2022-06-15 株式会社西村鐵工所 Disk type dryer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04347094A (en) * 1991-05-21 1992-12-02 Sekisui Chem Co Ltd Insulation resistance wire for deposited joint
JP4110296B2 (en) * 2003-03-31 2008-07-02 富士フイルム株式会社 Camera theft prevention method and imaging system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04347094A (en) * 1991-05-21 1992-12-02 Sekisui Chem Co Ltd Insulation resistance wire for deposited joint
JP4110296B2 (en) * 2003-03-31 2008-07-02 富士フイルム株式会社 Camera theft prevention method and imaging system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011089599A (en) * 2009-10-23 2011-05-06 Mitsui Kagaku Sanshi Kk Electric heating mat
JP2022088842A (en) * 2020-12-03 2022-06-15 株式会社西村鐵工所 Disk type dryer

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