JP3861741B2 - Energization control device for electric fusion joint - Google Patents

Energization control device for electric fusion joint Download PDF

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JP3861741B2
JP3861741B2 JP2002128331A JP2002128331A JP3861741B2 JP 3861741 B2 JP3861741 B2 JP 3861741B2 JP 2002128331 A JP2002128331 A JP 2002128331A JP 2002128331 A JP2002128331 A JP 2002128331A JP 3861741 B2 JP3861741 B2 JP 3861741B2
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electrode
connector
joint
terminal
electrodes
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JP2003320586A (en
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均 浅野
晃 竹内
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JFE Engineering Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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"
    • B29C65/3468—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
    • B29C66/50—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
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/87—Auxiliary operations or devices
    • B29C66/874—Safety measures or devices
    • B29C66/8742—Safety measures or devices for operators
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/96—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process
    • B29C66/967—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving special data inputs or special data outputs, e.g. for monitoring purposes
    • B29C66/9672—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving special data inputs or special data outputs, e.g. for monitoring purposes involving special data inputs, e.g. involving barcodes, RFID tags

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

Description

【０００１】
【発明の属する技術分野】
本発明は熱可塑性樹脂管を電気融着継手を用いて融着接合する際に用いる電気融着継手用の通電制御装置に関するものである。
【０００２】
【従来の技術】
従来、ポリエチレン管などの熱可塑性樹脂管の融着接合には、電気融着継手が一般的に用いられている。電気融着継手とは、継手内部に電熱線を埋設した継手をいう。
【０００３】
電気融着継手には、内部に埋設された電熱線に電気を流すため、通電制御装置に繋がる出力ケーブルの先端部差込口（コネクター）と、電熱線を接続するための電気融着継手の被差込口（ターミナル）が各継手毎に２ヵ所設置されている。
【０００４】
電気融着継手の融着時間制御方式には、自己制御方式と時間制御方式の２つの方法がある。自己制御方式には２つの方法があり、圧力検知方式が特開昭６０−１９８２２４号公報に、温度検知方式が特開平４−３６６０８８号公報に提案されている。
【０００５】
また、もう一方の時間制御方式には２つの方式があり、識別抵抗読み込み方式が特開平５−５２２２８８号公報、バーコード時間制御方式が特許第２７３９５７８号公報に提案されている。当該特許第２７３９５７８号公報を基本としてＩＳＯが制定されており、バーコード時間制御方式を用いる場合は、ＩＳＯ１３９５０／ＴＲに準拠したバーコードラベルを電気融着継手に装置することが一般的である。
【０００６】
現在、日本国内の各電機融着継手メーカーは、（１）圧力検知方式、）（２）温度検知方式、（３）識別抵抗読み込み方式、それぞれ異なった融着時間制御方式を採用している。
【０００７】
また、各メーカーの電気融着継手は、融着時間制御方法が異なることと同時に、通電制御装置との取り合い部分となる継手ターミナルおす状電極部の外径、ターミナル被差込部の内径が異なっている。
【０００８】
従来は、融着時間制御方法毎に専用のコントローラーが必要であるために、継手ターミナル形状が各メーカーで異なって、通電制御装置と継手が一対一の関係にあるため、使用する通電制御装置を使い分けることで互換性確保の必要性は無かった。
【０００９】
近年欧米で実績があり日本においても導入されるバーコード時間制御方式では、ＩＳＯ１３９５０／ＴＲに準拠するバーコードラベルが貼付された電気融着継手であれば通電制御上は、異なるメーカーの電気融着継手も融着が可能であることから、今後は（４）バーコード時間制御方式に対応した電気融着継手が普及することが予測される。
【００１０】
融着時間制御方法としては、ＩＳＯに準拠したバーコードラベルを添付した電気融着継手であれば、バーコード時間制御方式通電制御装置により融着時間制御が可能となる。
【００１１】
しかし、各メーカーのバーコード時間制御方式の通電制御装置の出力ケーブル先端のコネクター形状は、従来の通電制御装置メーカーと継手メーカーとの互換性を確保するために、現行の電気融着継手のターミナル形状が従来通りであることから、コネクターの電極部形状は、従来通りの電極部形状となっている。
【００１２】
このような、各メーカーの継手ターミナルにも接続可能とするために、特開２０００−２０８２１９で開示されているごとく、電気融着継手の電熱線に接続したターミナル端子と、これに通電する電気融着装置の電源コードに接続したター
ミナルコネクターとの間を連結するターミナルアダプターが提案されている。
【００１３】
また、融着制御方法が異なる電気融着継手を同一の通電制御装置で融着するために、特開平１１−３２０６８９号公報で開示されるごとく、コネクター内に複数の継手ターミナル差込口及びセンサーを設けることが提案されている。
【００１４】
【発明が解決しようとする課題】
異なるメーカーの電気融着継手を、１台のバーコード時間制御方式を兼ね備える通電制御装置を使用して融着作業を行なう場合、継手に合ったアダプターが必要となる。
【００１５】
しかし、アダプターを使用した場合、使用しない場合に比べ接続箇所数が２倍となる。このため、接続部での接触抵抗が増大する。効率よく電気エネルギーを電気融着継手の電熱線に供給することが必要な電気融着継手では、極力接触抵抗を減らすことが、品質向上に繋がる。
【００１６】
また、アダプター本体は、継手電極との取り合いを考えた場合、小さい物となるため、使用している間に紛失する可能性が大きい。
【００１７】
異なる融着時間制御方式での互換性を確保するために、同一のコネクター内に電極及び圧力検知用のセンサー及び温度検知用のセンサーを設けることが提案されている。
【００１８】
しかし、形状が非常に複雑で且つ嵩高であるために、埋設等の限られた空間で電気融着継手のターミナル部に接続する場合には、作業性が良くない問題がある。
【００１９】
また、同一の通電制御装置内に複数の通電制御方法に対応したシステムを搭載する必要があるために非常に高価で且つ重い通電制御装置となる問題がある。
【００２０】
従って、本発明の目的は、上述の問題点を解決し、ターミナルの種類が異なる電気融着継手の電源ケーブルの接続を簡便に且つ安全に行なうことができる電気融着継手用通電制御装置を提供することにある。
【００２１】
【課題を解決するための手段】
請求項１記載の発明は電気融着継手と樹脂管とを接合する際に用いる電気融着継手用通電制御装置において、種類が異なる２つの電極を有するコネクターを備え、前記コネクターは前記２つの電極が前記コネクターの本体を挟んだ両側に対称に配置されており、前記２つの電極はめす状の電極からなり、前記２つの電極内には、前記電極内を塞いで感電を防止するための電極ガード棒が、前記２つの電極内において摺動可能に配されていることに特徴を有するものである。
【００２２】
請求項２記載の発明は、電気融着継手と樹脂管とを接合する際に用いる電気融着継手用通電制御装置において、種類が異なる２つの電極を有するコネクターを備え、前記コネクターは前記２つの電極が前記コネクターの本体を挟んだ両側に対称に配置されており、前記コネクターは前記電極の周囲に配された非導電体からなるコネクター差込部を備え、前記コネクター差込部の形状は、非接続側の電気融着継手のターミナルに設けられたターミナル被差込部に嵌合できない形状であることに特徴を有するものである。
【００２３】
請求項３記載の発明は、電気融着継手と樹脂管とを接合する際に用いる電気融着継手用通電制御装置において、種類が異なる２つの電極を有するコネクターを備え、前記２つの電極はめす状の電極からなり、前記２つのめす状電極は前記コネクターの本体を挟んだ両側に対称に配置されており、一方のめす状電極には、前記電極内を塞いで感電を防止するための電極ガード棒の一方側が、他方のめす状電極には前記電極ガード棒の他方側が、前記２つのめす状電極内において摺動可能に配され、前記一方のめす状電極が前記電気融着継手のターミナルのおす状の電極に差し込まれるときは、前記おす状電極によって押された前記電極ガード棒の他方側によって前記他方のめす状電極内が塞がれることに特徴を有するものである。
【００２４】
請求項４記載の発明は、前記コネクターは、前記めす状電極の周囲に配された非導電体からなるコネクター差込部を備え、前記電気融着継手のターミナルは、前記コネクター差込部を差し込むための、非導電体からなる凹状のターミナル被差込部を備え、前記ターミナルのおす状電極は、前記ターミナル被差込部内に設けられており、前記ターミナルのおす状電極は、前記一方のめす状電極と嵌合可能な一方のおす状電極、又は、前記他方のめす状電極と嵌合可能な他方のおす状電極であり、前記一方のめす状電極の内径は、前記他方のめす状電極の内径よりも大径となっており、前記一方のめす状電極の周囲の前記コネクター差込部の外径は、前記他方のおす状電極が設けられた前記ターミナル被差込部の内径よりも大径となっており、かくして、前記一方のめす状電極が前記他方のおす状電極に誤って差し込まれることがないようになっていることに特徴を有するものである。
【００２５】
【発明の実施の形態】
次に、本発明の実施の形態を図面を参照しながら説明する。
【００２６】
図１は、本発明の実施の形態に係るコネクターの平面図、図２は、側面図、図３は、電極ガード棒を示す側面図、図４は、通電制御装置と電気融着継手との接続図、図５は、コネクターの第１電極と第１電気融着継手（Ａ社製）のターミナルとを接続した状態を示す断面図、図６は、コネクターの第２電極と第２電気融着継手（Ｂ社製）のターミナルとを接続した状態を示す断面図、図７は、コネクターの第１電極と第２電気融着継手（Ｂ社製）のターミナルとが接続できない状態を示す断面図、図８は、コネクターの第２電極と第１電気融着継手（Ａ社製）のターミナルとが接続できない状態を示す断面図である。
【００２７】
図４に示すように、電気融着継手２（Ａ社製の電気融着継手２１、Ｂ社製の電気融着継手２２）は、電気融着継手用通電制御装置（以下、「通電制御装置」という）１からの２本の電源ケーブル（出力ケーブル）６、６を備え、その先端部にはコネクター（差し込み口）４が設けられている。電気融着継手２は、管３、３の端部外側には嵌められている。電気融着継手２には２つのターミナル５が設けられており、電源ケーブル６は、コネクター４とターミナル５とによって接続されるようになっている。
【００２８】
図１、２、図５〜８に示すように、コネクター４は、コネクター本体４ａと、コネクター本体４ａを挟んだ両側に対称に配置された、図２、図５〜８の図面上においては、コネクター本体４ａを挟んだ両側に上下対称に配置された、第１電極７（以下、「電極７」）及び第２電極８（以下、「電極８」）を備えている。電極７は、円筒状のめす状の電極であり、電極７の周囲には、円筒状の非導電体からなるコネクター差込部１７が配されている。電極８は、めす状の電極７よりも内径の小さい、円筒状のめす状の電極であり、電極８の周囲には、前記のコネクター差込部１７よりも外径の小さい、円筒状の非導電体からなるコネクター差込部１８が配されている。そして、めす状の電極７と電極８とは、互いの軸線が１軸線状になるように配置されている。このめす状の電極７、８は、例えば、真鍮等からなっている。コネクター差込部１７、１８は、例えば、樹脂等からなっている。
【００２９】
電気融着継手２｛２１（Ａ社）、２２（Ｂ社）｝は継手メーカーによってターミナル５（５１、５２）の電極の規格が異なるが、コネクター４の電極７は電気融着継手２１（Ａ社）に、電極８は電気融着継手２２（Ｂ社）に、それぞれ規格が合うように製造されており、電気融着継手に応じて電極７又は電極８を選択して用いる。
【００３０】
図５〜８に示すように、コネクター本体４ａには電源ケーブル６が接続されている。該コネクター本体４ａ内には、導電体からなるストッパー９が設けられ、ストッパー９は、電極７、８と電源ケーブル６とを接続している。更に、ストッパー９は略箱状体となっており、その上下（図５〜８の図面上において）、すなわち、電極７側及び８側のそれぞれには、非導電体、例えば、樹脂等からなる電極ガード棒１０を挿通するための孔９ａ、９ｂが穿孔されている。
【００３１】
電極ガード棒１０は、電極７内に挿入可能な外径を有する大径部１０ａと、電極８内に挿入可能な外径を有する小径部１０ｂと、孔９ａ、９ｂの内径よりも大きな外径を有する中央部１０ｃとからなっている。ストッパー９の孔９ａは、電極ガード棒１０の大径部１０ａよりもやや大きい内径を有し、ストッパー９の孔９ｂは、電極ガード棒１０の小径部１０ｂよりもやや大きい内径を有し、かくして、電極ガード棒１０の大径部１０ａは孔９ａを、電極ガード棒１０の小径部１０ｂは孔９ｂを、それぞれ通過可能である。また、ストッパー９内に配置されている電極ガード棒１０の中央部１０ｃはその外径が孔９ａ及び９ｂの内径よりも大きいので、電極ガード棒１０がストッパー９から抜けることはない。
【００３２】
電極ガード棒１０の小径部１０ｂは孔９ｂを介して電極８内に挿入され、大径部１０ａは孔９ａを介して電極７に挿入され、かくして、電極７、８内が電極ガード棒１０によって塞がれる。電極ガード棒１０の中央部１０ｃの、図５〜８に示す上下方向の高さは、ストッパー９の内側の上下方向高さよりも所定寸法小さく形成されており、電極ガード棒１０は、中央部１０ｃがストッパー９内において上下に移動可能な距離の分だけ、上下に移動可能である。かくして、電極ガード棒１０の小径部１０ｂは電極８内で、大径部１０ａは電極７内で、それぞれ上下に摺動可能である。そして、電極ガード棒１０が電極７側に移動したときは大径部１０ａが電極７内の空間を塞ぎ、一方、該ガード棒１０が電極８側に移動したときは小径部１０ｂが電極８内の空間を塞ぐ。
【００３３】
次に、電気融着継手２（２１、２２）のターミナル５（５１、５２）について説明する。電気融着継手２１（Ａ社）には、ターミナル５１が設置されている（図５、８参照）。一方、電気融着継手２２（Ｂ社）には、ターミナル５２が設置されている（図６、７参照）。
【００３４】
ターミナル５１は、コネクター４の電極７と嵌合可能で、電極８と嵌合不能である（図５、８参照）。一方、ターミナル５２は、コネクター４の電極８と嵌合可能で、電極７と嵌合不能である（図６、７参照）。
【００３５】
図５、８に示すように、ターミナル５１は、コネクター４の電極７のコネクター差込部１７を挿入するための、非導電体（電気融着継手２１の本体と同材質）からなる凹状のターミナル被差込部１２と、前記ターミナル被差込部１２内に設けられた、電極７と嵌合可能なおす状の電極１１とを備えている。ターミナル被差込部１２の内径は、電極７のコネクター差込部１７を挿入可能な所定の寸法を備えている。
【００３６】
図６、７に示すように、ターミナル５２は、コネクター４の電極８のコネクター差込部１８を挿入するための、非導電体（電気融着継手２２の本体と同材質）からなる凹状のターミナル被差込部１４と、前記ターミナル被差込部１４内に設けられた、電極８と嵌合可能なおす状の電極１３とを備えている。ターミナル被差込部１４の内径は、電極８のコネクター差込部１８を挿入可能な所定の寸法を備えている。
【００３７】
図５に示すように、電気融着継手２１のターミナル５１に差し込むときは、電極７を選択し、電極７を下に向けてターミナル５１に差し込む。これにより、ターミナル５１のおす状の電極１１が電極ガード棒１０を押し上げ、電極ガード棒１０の小径部１０ｂが電極８内の空間を塞ぎ、電極８の内表面が露出せず、人などが直接電極８に触れて感電すること等が防止される。
【００３８】
図６に示すように、電気融着継手２２のターミナル５２に差し込むときは、電極８を選択し、電極８を下に向けてターミナル５２に差し込む。これにより、ターミナル５２のおす状の電極１３が電極ガード棒１０を押し上げ、電極ガード棒１０の大径部１０ａが電極７内の空間を塞ぎ、電極７の内表面が露出せず、人などが直接電極７に触れて感電すること等が防止される。
【００３９】
更に、電極ガード棒１０がターミナル５に差し込まれない側の電極（７又は８）の空間を塞ぐことにより、空間内に泥等の異物が入りにくくなる。それによりコネクター４とターミナル５との電極間の接触抵抗の増大が防止される。更に、泥等に含まれる水分による電極表面の錆びが防止される。
【００４０】
以上、コネクター４は、電極７及び電極８が上下対称に配置されているので、作業者等が容易に電極を選ぶことができ、ターミナルへの差込み作業を容易に行なうことができる。
【００４１】
次に、本発明の差込み間違い（誤差込み）防止機構について説明する。図７に示すように、本発明のコネクターは、第１電極７と第２電極８を有するが、第１電極７の内径は、第２電極８の内径よりも大径である。従って、第２電極８と接続するＢ社の電気融着継手（以下、「ＥＦ継手」という）２２のターミナル５２のおす状の電極１３の外径は、第１電極７と接続するＡ社のＥＦ継手２１のおす状の電極１１の外径よりも小径である。従って、第１電極７を、誤ってＢ社のＥＦ継手２２のターミナル５２に差し込もうとしたときは、第１電極７の内径の方が、ＥＦ継手２２のターミナル５２のおす状電極１３の外径Ｘ（図７参照）よりもかなり大径なので、いわゆるスカスカの状態ながら、第１電極７内にこのおす状電極１２が嵌合されてしまうこととなる。これを防ぐために、第１電極７のコネクター差込部１７の外径Ｙ（図７参照）は、Ｂ社のＥＦ継手２２のターミナル被差込部１４の内径Ｚ（図７参照）よりも大径となっている。これにより、第１電極７のコネクター差込部１７と、Ｂ社のＥＦ継手２２のターミナル被差込部１４とが突き当たって、第１電極７のコネクター差込部１７をＢ社のＥＦ継手２２のターミナル被差込部１４内に差し込むことができず、結果として、第１電極７がＢ社のＥＦ継手２２のターミナル５２と接合されることはない。
【００４２】
一方、図８に示すように、第２電極８を誤ってＡ社のＥＦ継手２１のターミナル５１に差し込もうとしてしまったときは、第２電極８内にＡ社のＥＦ継手２１のターミナル５１のおす状電極１１が挿入されなければよく、従って、第２電極８の内径Ｖ（図８参照）は、Ａ社のＥＦ継手２１のターミナル５１のおす状電極１１の外径W（図８参照）よりも小径となっている。これにより、第２電極８がＡ社のＥＦ継手２１のターミナル５１のおす状電極１１と突き当たって、ＥＦ継手２１のターミナル５１のおす状電極１１を第２電極８内に挿入することができず、結果として、第２電極８がＡ社のＥＦ継手２１のターミナル５１と接続されることはない。
【００４３】
【実施例】
次に、本発明を用いて、熱可塑性樹脂管を電気融着継手を用いて融着接合する実施例を説明する。
【００４４】
図９は、接合する樹脂管（以下、「パイプ」という）の外側に電気融着継手（「ＥＦ継手」）を被覆し、ＥＦ継手に通電してパイプとＥＦ継手とを融着接合し、かくして、パイプをつなげる下記、１．〜１４．の工程からなる実施例を示す説明図である。本実施例は、バーコード方式及び圧力検知方式に共通するパイプの接合作業である。
１．パイプ３の融着部の表面を切削する。
２．パイプ３の融着部の表面を清掃する。
３．ＥＦ継手２の内面を清掃する。
４．ＥＦ継手２にパイプ３を挿入する。
５．ＥＦ継手２とパイプ３をクランプ（固定冶具）（図示せず）で固定する。
６．本発明コネクター（以下、「コネクター」という）４に被せておいた感電防止用のゴムカバー（図示せず）を取り外す。
７．ＥＦ継手２のターミナル５と、電源ケーブル６のコネクター４とを接続する。接続作業工程を、下記（１）〜（５）に詳細に示す。
【００４５】
（１） 複数社ある中から選んだＥＦ継手のターミナル形状に合わせてコネクターの電極部を選択する。例えば、本実施例においては、Ａ社のＥＦ継手を用いるものとし、このＡ社のＥＦ継手に適合する第１電極を選択する。
【００４６】
（２） 選択を容易にするために、コネクターの電極部（コネクター差込部）は色分けされている。これにより、電極を間違えることはない。
【００４７】
（３） 選択したコネクターの第１電極のコネクター差込部を、Ａ社のＥＦ継手のターミナルの被差込部に差し込む。これにより、第１電極内に、Ａ社のＥＦ継手のターミナルのおす状の電極が差し込まれ、Ａ社のＥＦ継手に電源ケーブルが接続される。本発明電気融着継手用通電制御装置は、コネクターの第１電極と第２電極とが、コネクター本体を挟んだ両側に対称に配置されているので、図９に示すようにＥＦ継手の上部に位置しているターミナルに対して、選択した第１電極をコネクターの下部に位置させて作業者がコネクターを把持すれば、容易に第１電極を下方のＥＦ継手のターミナルに差し込むことができる。
【００４８】
（４） 第１電極を下方のＥＦ継手のターミナルに差し込んだとき、第１電極内の電極ガード棒が、Ａ社のＥＦ継手のターミナルのおす状の電極に押されて、第１電極とは反対側の第２電極内に押し出され、第２電極内が塞がれて第２電極の内表面が露出しない状態となる。かくして、人などが直接電極に触れて感電すること等が防止される。更に、電極ガード棒が非接続側の電極の空間を塞ぐことにより、泥等の異物が入りにくくなり、コネクターとターミナルとの電極間の接触抵抗の増大が防止され、及び、泥等に含まれる水分による電極表面の錆びが防止される。
【００４９】
（５） 本発明の電気融着継手用通電制御装置は、差込み間違い（誤差込み）防止機構を備えているので、規格が合わないコネクターとＥＦ継手のターミナルとが誤って接続されることはない。
【００５０】
８．バーコードリーダー１５でバーコードラベル１６を読み込む。
９．通電制御装置１の融着開始ボタンを押す。
１０．融着（通電）。
１１．コネクター４を継手ターミナル５から取り外す。
１２．コネクター４にゴムカバーを取り付ける。
１３．冷却状態により保持する。
１４．次の、ＥＦ継手融着工程へ。
【００５１】
【発明の効果】
以上説明したように、本発明によれば下記に示す有用な効果がもたらされる。
（１） コネクターの電極を、コネクター本体を挟んで対称に配置したので、使用する電極を容易に選択することができ、各種形状の異なる電気融着継手のターミナル電極であっても、コネクターを間違えることなく選択し、電源ケーブルを電気融着継手に接続することができる。また、異なるメーカーの継手も併用して同一の通電制御装置によって電気融着接合が可能である。
（２） コネクターに複数の電極を装備することによりアダプターを使用しないため、該アダプター等の付け替え作業を行うことなく迅速に電気融着接合が可能である。また、コネクター自体が非常に小さくターミナルへの接続が非常に行ない易い。
（３） 電極ガード棒という簡便な機構を用いた感電防止機能を装備しているので、コネクター形状を大型化することなく感電の恐れを解消し安全性を確保することができる。更に、電極ガード棒が非接続側の電極の空間を塞ぐことにより、泥等の異物が入りにくくなる。それによりコネクターとターミナルとの電極間の接触抵抗の増大が防止され、及び、泥等に含まれる水分による電極表面の錆びが防止される。
（４） コネクター電極部の電極、コネクター差込口の形状、寸法を規定することにより、非接続側の電気融着継手のターミナルに誤って接続されることが防止される。
【図面の簡単な説明】
【図１】 本発明の実施の形態に係るコネクターの平面図である。
【図２】 本発明の実施の形態に係るコネクターの側面図である。
【図３】 本発明の実施の形態に係る電極ガード棒を示す側面図である。
【図４】 本発明の実施の形態に係る通電制御装置と電気融着継手との接続を示す説明図である。
【図５】 本発明の実施の形態に係るコネクターの第１電極と第１電気融着継手（Ａ社製）のターミナルとを接続した状態を示す断面図である。
【図６】 本発明の実施の形態に係るコネクターの第２電極と第２電気融着継手（Ｂ社製）のターミナルとを接続した状態を示す断面図である。
【図７】 本発明の実施の形態に係るコネクターの第１電極と第２電気融着継手（Ｂ社製）のターミナルとが接続できない状態を示す断面図である。
【図８】 本発明の実施の形態に係るコネクターの第２電極と第１電気融着継手（Ａ社製）のターミナルとが接続できない状態を示す断面図である。
【図９】 熱可塑性樹脂管を電気融着継手を用いて融着接合する本発明の実施例を示す説明図である。
【符号の説明】
１ 通電制御装置
２ 電気融着継手
２１ Ａ社の電気融着継手
２２ Ｂ社の電気融着継手
３ 管
４ コネクター
４ａ コネクター本体
５ ターミナル
５１ Ａ社の電気融着継手２１のターミナル
５２ Ｂ社の電気融着継手２２のターミナル
６ 電源ケーブル
７ 第１電極
８ 第２電極
９ ストッパー
９ａ、９ｂ 孔
１０ 電極ガード棒
１０ａ 電極ガード棒の大径部
１０ｂ 電極ガード棒の小径部
１０ｃ 電極ガード棒の中央部
１１ おす状の電極
１２ ターミナル被差込部
１３ おす状の電極
１４ ターミナル被差込部
１５ バーコードリーダー
１６ バーコードラベル
１７ 第１電極のコネクター差込部
１８ 第２電極のコネクター差込部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an energization control device for an electric fusion joint used when a thermoplastic resin pipe is fusion-bonded using an electric fusion joint.
[0002]
[Prior art]
Conventionally, an electric fusion joint is generally used for fusion bonding of thermoplastic resin pipes such as polyethylene pipes. The electric fusion joint is a joint in which a heating wire is embedded inside the joint.
[0003]
In the electric fusion joint, in order to pass electricity through the heating wire embedded inside, the tip end of the output cable (connector) connected to the current controller is connected to the electric fusion joint for connecting the heating wire. Two insertion ports (terminals) are installed for each joint.
[0004]
There are two methods for controlling the fusion time of an electric fusion joint: a self-control method and a time control method. There are two self-control methods, a pressure detection method is proposed in Japanese Patent Laid-Open No. 60-198224, and a temperature detection method is proposed in Japanese Patent Laid-Open No. 4-366088.
[0005]
In addition, there are two other time control methods, and an identification resistance reading method is proposed in Japanese Patent Laid-Open No. 5-522288, and a barcode time control method is proposed in Japanese Patent No. 2739578. ISO has been established on the basis of the Japanese Patent No. 2739578, and when a barcode time control system is used, it is common to install a barcode label conforming to ISO 13950 / TR on an electric fusion joint.
[0006]
At present, each electric fusion joint manufacturer in Japan employs (1) pressure detection method, (2) temperature detection method, (3) identification resistance reading method, and different fusion time control methods.
[0007]
In addition, each manufacturer's electric fusion joints have different fusion time control methods, and at the same time, the outer diameter of the joint terminal male electrode part and the inner diameter of the terminal insertion part, which are parts to be engaged with the power supply control device, are different. ing.
[0008]
Conventionally, since a dedicated controller is required for each fusion time control method, the shape of the joint terminal differs from manufacturer to manufacturer, and the current controller and joint have a one-to-one relationship. There was no need to ensure compatibility through proper use.
[0009]
In the bar code time control method that has been used in Europe and America in recent years and is also introduced in Japan, an electric fusion joint with a bar code label that conforms to ISO 13950 / TR is used. Since joints can also be fused, it is predicted that electric fusion joints compatible with the (4) bar code time control method will become widespread in the future.
[0010]
As a fusion time control method, if it is an electric fusion joint with a bar code label conforming to ISO, the fusion time control can be performed by a barcode time control type energization control device.
[0011]
However, the connector shape at the end of the output cable of each manufacturer's bar code time control energization control device is the terminal of the current electric fusion joint to ensure compatibility between the conventional energization control device manufacturer and the joint manufacturer. Since the shape is conventional, the electrode part shape of the connector is a conventional electrode part shape.
[0012]
In order to enable connection to such manufacturer's joint terminals, as disclosed in Japanese Patent Laid-Open No. 2000-208219, a terminal terminal connected to a heating wire of an electric fusion joint, There has been proposed a terminal adapter for connecting a terminal connector connected to a power cord of a landing gear.
[0013]
Further, in order to fuse electric fusion joints having different fusion control methods with the same energization control device, as disclosed in JP-A-11-320689, a plurality of joint terminal insertion ports and sensors are provided in the connector. Has been proposed.
[0014]
[Problems to be solved by the invention]
When an electric fusion joint of a different manufacturer is used to perform fusion work using an energization control device that also has one bar code time control method, an adapter suitable for the joint is required.
[0015]
However, when the adapter is used, the number of connection points is doubled compared to when the adapter is not used. For this reason, the contact resistance in a connection part increases. In an electric fusion joint that needs to efficiently supply electric energy to the heating wire of the electric fusion joint, reducing the contact resistance as much as possible leads to quality improvement.
[0016]
Further, the adapter body is small when considering the connection with the joint electrode, and therefore, the adapter body is likely to be lost during use.
[0017]
In order to ensure compatibility with different fusion time control systems, it has been proposed to provide an electrode, a sensor for pressure detection, and a sensor for temperature detection in the same connector.
[0018]
However, since the shape is very complicated and bulky, there is a problem that workability is not good when connecting to the terminal portion of the electrofusion joint in a limited space such as embedded.
[0019]
In addition, since it is necessary to mount a system corresponding to a plurality of energization control methods in the same energization control device, there is a problem that the energization control device is very expensive and heavy.
[0020]
Accordingly, an object of the present invention is to provide an energization control device for an electric fusion joint that can solve the above-mentioned problems and can easily and safely connect power cables of electric fusion joints of different types of terminals. There is to do.
[0021]
[Means for Solving the Problems]
The invention according to claim 1 is an energization control device for an electrofusion joint used when joining an electrofusion joint and a resin pipe, and includes a connector having two different types of electrodes, the connector being the two electrodes Are arranged symmetrically on both sides of the connector main body, and the two electrodes are formed of female electrodes, and the electrodes for closing the electrodes to prevent an electric shock. The guard rod is characterized in that it is slidably disposed in the two electrodes .
[0022]
According to a second aspect of the present invention, in the energization control device for an electrofusion joint used when joining an electrofusion joint and a resin pipe, the electrofusion joint energization control device includes a connector having two different types of electrodes. The electrodes are symmetrically disposed on both sides of the connector body, and the connector includes a connector insertion portion made of a non-conductor disposed around the electrode, and the shape of the connector insertion portion is: It is characterized in that it has a shape that cannot be fitted into a terminal insertion portion provided in a terminal of the non-connection-side electric fusion joint.
[0023]
According to a third aspect of the present invention, in an energization control device for an electrofusion joint used when joining an electrofusion joint and a resin pipe, the electrofusion joint energization control device includes a connector having two different types of electrodes, and the two electrodes are female. The two female electrodes are symmetrically arranged on both sides of the connector body, and one female electrode is an electrode for closing the inside of the electrode to prevent electric shock. One side of the guard rod is disposed on the other female electrode so that the other side of the electrode guard rod is slidable within the two female electrodes, and the one female electrode is a terminal of the electrofusion joint. When inserted into the male electrode, the other female electrode is blocked by the other side of the electrode guard rod pushed by the male electrode.
[0024]
According to a fourth aspect of the present invention, the connector includes a connector insertion portion made of a non-conductor disposed around the female electrode, and a terminal of the electrofusion joint inserts the connector insertion portion. The terminal male electrode is provided in the terminal inserted portion, and the terminal male electrode is the first female electrode. One female electrode that can be fitted to the other electrode, or the other female electrode that can be fitted to the other female electrode, and the inner diameter of the first female electrode is the other female electrode. The outer diameter of the connector insertion portion around the one female electrode is larger than the inner diameter of the terminal insertion portion provided with the other male electrode. It has become a large diameter, or To, be one having a characteristic that is adapted to have no said that one of the female-like electrode inserted by mistake vinegar-like electrodes of the other.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
[0026]
FIG. 1 is a plan view of a connector according to an embodiment of the present invention, FIG. 2 is a side view, FIG. 3 is a side view showing an electrode guard rod, and FIG. FIG. 5 is a cross-sectional view showing a state in which the first electrode of the connector and the terminal of the first electrofusion joint (manufactured by Company A) are connected, and FIG. FIG. 7 is a cross-sectional view showing a state in which a terminal of a fitting joint (manufactured by B company) is connected, and FIG. FIG. 8 is a cross-sectional view showing a state where the second electrode of the connector and the terminal of the first electrofusion joint (manufactured by Company A) cannot be connected.
[0027]
As shown in FIG. 4, the electric fusion joint 2 (the electric fusion joint 21 manufactured by Company A and the electric fusion joint 22 manufactured by Company B) is an electric conduction control device for electric fusion joints (hereinafter referred to as “electric conduction control device”). 2 ”are provided with two power cables (output cables) 6 and 6, and a connector (insertion port) 4 is provided at the tip thereof. The electric fusion joint 2 is fitted on the outer side of the ends of the tubes 3 and 3. The electric fusion joint 2 is provided with two terminals 5, and the power cable 6 is connected to the connector 4 and the terminal 5.
[0028]
As shown in FIGS. 1, 2, and 5-8, the connector 4 is disposed symmetrically on both sides of the connector body 4a and the connector body 4a, and in the drawings of FIGS. 2 and 5-8, A first electrode 7 (hereinafter referred to as “electrode 7”) and a second electrode 8 (hereinafter referred to as “electrode 8”) are provided symmetrically on both sides of the connector body 4a. The electrode 7 is a cylindrical female electrode, and a connector insertion portion 17 made of a cylindrical nonconductor is disposed around the electrode 7. The electrode 8 is a cylindrical female electrode having a smaller inner diameter than the female electrode 7, and a cylindrical non-cylindrical electrode having an outer diameter smaller than that of the connector insertion portion 17 around the electrode 8. A connector insertion portion 18 made of a conductor is disposed. And the female electrode 7 and the electrode 8 are arrange | positioned so that a mutual axis may become uniaxial. The female electrodes 7 and 8 are made of, for example, brass. The connector insertion parts 17 and 18 are made of, for example, resin.
[0029]
In the electric fusion joint 2 {21 (Company A), 22 (Company B)}, the electrode standard of the terminal 5 (51, 52) differs depending on the joint manufacturer, but the electrode 7 of the connector 4 is the electric fusion joint 21 (A The electrode 8 is manufactured so as to meet the specifications of the electric fusion joint 22 (Company B), and the electrode 7 or the electrode 8 is selected and used according to the electric fusion joint.
[0030]
As shown in FIGS. 5 to 8, a power cable 6 is connected to the connector body 4a. A stopper 9 made of a conductor is provided in the connector main body 4 a, and the stopper 9 connects the electrodes 7 and 8 and the power cable 6. Furthermore, the stopper 9 is a substantially box-like body, and is made of a non-conductive material, such as a resin, on the upper and lower sides (in the drawings of FIGS. 5 to 8), that is, on the electrode 7 side and the 8 side, respectively. Holes 9a and 9b for inserting the electrode guard rod 10 are perforated.
[0031]
The electrode guard rod 10 has a large diameter portion 10a having an outer diameter that can be inserted into the electrode 7, a small diameter portion 10b having an outer diameter that can be inserted into the electrode 8, and an outer diameter larger than the inner diameters of the holes 9a and 9b. And a central portion 10c having The hole 9a of the stopper 9 has a slightly larger inner diameter than the large-diameter portion 10a of the electrode guard rod 10, and the hole 9b of the stopper 9 has a slightly larger inner diameter than the small-diameter portion 10b of the electrode guard rod 10, thus The large-diameter portion 10a of the electrode guard rod 10 can pass through the hole 9a, and the small-diameter portion 10b of the electrode guard rod 10 can pass through the hole 9b. Further, since the outer diameter of the central portion 10c of the electrode guard rod 10 disposed in the stopper 9 is larger than the inner diameters of the holes 9a and 9b, the electrode guard rod 10 does not come out of the stopper 9.
[0032]
The small-diameter portion 10b of the electrode guard rod 10 is inserted into the electrode 8 through the hole 9b, and the large-diameter portion 10a is inserted into the electrode 7 through the hole 9a. It is blocked. The vertical height of the central portion 10c of the electrode guard rod 10 shown in FIGS. 5 to 8 is smaller than the vertical height inside the stopper 9 by a predetermined dimension. The electrode guard rod 10 has a central portion 10c. However, it can move up and down by the distance that can move up and down in the stopper 9. Thus, the small-diameter portion 10b of the electrode guard rod 10 can slide up and down in the electrode 8 and the large-diameter portion 10a in the electrode 7, respectively. When the electrode guard rod 10 moves to the electrode 7 side, the large-diameter portion 10a closes the space inside the electrode 7, while when the guard rod 10 moves to the electrode 8 side, the small-diameter portion 10b moves inside the electrode 8. Block the space.
[0033]
Next, the terminal 5 (51, 52) of the electric fusion joint 2 (21, 22) will be described. A terminal 51 is installed in the electric fusion joint 21 (Company A) (see FIGS. 5 and 8). On the other hand, the terminal 52 is installed in the electric fusion joint 22 (Company B) (see FIGS. 6 and 7).
[0034]
The terminal 51 can be fitted to the electrode 7 of the connector 4 and cannot be fitted to the electrode 8 (see FIGS. 5 and 8). On the other hand, the terminal 52 can be fitted to the electrode 8 of the connector 4 and cannot be fitted to the electrode 7 (see FIGS. 6 and 7).
[0035]
As shown in FIGS. 5 and 8, the terminal 51 is a concave terminal made of a non-conductive material (same material as the main body of the electrofusion joint 21) for inserting the connector insertion portion 17 of the electrode 7 of the connector 4. A plug-in portion 12 and a male electrode 11 provided in the terminal plug-in portion 12 and capable of fitting with the electrode 7 are provided. The inner diameter of the terminal insertion part 12 has a predetermined dimension into which the connector insertion part 17 of the electrode 7 can be inserted.
[0036]
As shown in FIGS. 6 and 7, the terminal 52 is a concave terminal made of a non-conductive material (same material as the main body of the electrofusion joint 22) for inserting the connector insertion portion 18 of the electrode 8 of the connector 4. A plug-in portion 14 and a male electrode 13 which is provided in the terminal plug-in portion 14 and can be fitted to the electrode 8 are provided. The inner diameter of the terminal insertion part 14 has a predetermined dimension into which the connector insertion part 18 of the electrode 8 can be inserted.
[0037]
As shown in FIG. 5, when inserting into the terminal 51 of the electrofusion joint 21, the electrode 7 is selected, and the electrode 7 is inserted downward into the terminal 51. As a result, the male electrode 11 of the terminal 51 pushes up the electrode guard rod 10, the small diameter portion 10b of the electrode guard rod 10 closes the space in the electrode 8, the inner surface of the electrode 8 is not exposed, and a person or the like directly It is possible to prevent an electric shock by touching the electrode 8.
[0038]
As shown in FIG. 6, when inserting into the terminal 52 of the electrofusion joint 22, the electrode 8 is selected, and the electrode 8 is inserted downward into the terminal 52. As a result, the male electrode 13 of the terminal 52 pushes up the electrode guard rod 10, the large-diameter portion 10a of the electrode guard rod 10 closes the space in the electrode 7, the inner surface of the electrode 7 is not exposed, and a person etc. It is possible to prevent an electric shock by directly touching the electrode 7.
[0039]
Furthermore, foreign substances such as mud are less likely to enter the space by closing the space of the electrode (7 or 8) on the side where the electrode guard rod 10 is not inserted into the terminal 5. Thereby, an increase in contact resistance between the electrodes of the connector 4 and the terminal 5 is prevented. Further, rusting of the electrode surface due to moisture contained in mud or the like is prevented.
[0040]
As described above, since the electrode 7 and the electrode 8 are arranged vertically symmetrically in the connector 4, an operator or the like can easily select the electrode and can easily perform the insertion work into the terminal.
[0041]
Next, a mechanism for preventing erroneous insertion (including errors) according to the present invention will be described. As shown in FIG. 7, the connector of the present invention includes the first electrode 7 and the second electrode 8, and the inner diameter of the first electrode 7 is larger than the inner diameter of the second electrode 8. Therefore, the outer diameter of the male electrode 13 of the terminal 52 of the electric fusion joint (hereinafter referred to as “EF joint”) 22 of the company B connected to the second electrode 8 is that of the company A connected to the first electrode 7. The EF joint 21 has a smaller diameter than the outer diameter of the male electrode 11. Therefore, when the first electrode 7 is mistakenly inserted into the terminal 52 of the EF joint 22 of Company B, the inner diameter of the first electrode 7 is smaller than that of the male electrode 13 of the terminal 52 of the EF joint 22. Since the diameter is considerably larger than the outer diameter X (see FIG. 7), the male electrode 12 is fitted into the first electrode 7 while being in a so-called scaly state. In order to prevent this, the outer diameter Y (see FIG. 7) of the connector insertion portion 17 of the first electrode 7 is larger than the inner diameter Z (see FIG. 7) of the terminal insertion portion 14 of the EF joint 22 of B company. It is a diameter. Thereby, the connector insertion part 17 of the 1st electrode 7 and the terminal insertion part 14 of the EF joint 22 of B company contact | abut, and the connector insertion part 17 of the 1st electrode 7 is EF joint 22 of B company. As a result, the first electrode 7 is not joined to the terminal 52 of the EF joint 22 of B company.
[0042]
On the other hand, as shown in FIG. 8, when the second electrode 8 is mistakenly inserted into the terminal 51 of the EF joint 21 of company A, the terminal 51 of the EF joint 21 of company A is inserted into the second electrode 8. The male electrode 11 need not be inserted. Therefore, the inner diameter V (see FIG. 8) of the second electrode 8 is the outer diameter W (see FIG. 8) of the male electrode 11 of the terminal 51 of the EF joint 21 of company A. ) Is smaller than. As a result, the second electrode 8 abuts against the male electrode 11 of the terminal 51 of the EF joint 21 of Company A, and the male electrode 11 of the terminal 51 of the EF joint 21 cannot be inserted into the second electrode 8. As a result, the second electrode 8 is not connected to the terminal 51 of the EF joint 21 of company A.
[0043]
【Example】
Next, an embodiment in which a thermoplastic resin pipe is fusion-bonded using an electric fusion joint using the present invention will be described.
[0044]
FIG. 9 shows an outer surface of a resin pipe to be joined (hereinafter referred to as “pipe”) covered with an electric fusion joint (“EF joint”), and the pipe and the EF joint are fusion-bonded by energizing the EF joint. Thus, connecting the pipes: -14. It is explanatory drawing which shows the Example which consists of these processes. The present embodiment is a pipe joining operation common to the barcode method and the pressure detection method.
1. The surface of the fused part of the pipe 3 is cut.
2. The surface of the fused part of the pipe 3 is cleaned.
3. Clean the inner surface of the EF joint 2.
4). The pipe 3 is inserted into the EF joint 2.
5). The EF joint 2 and the pipe 3 are fixed with a clamp (fixing jig) (not shown).
6). A rubber cover (not shown) for preventing electric shock that has been put on the connector (hereinafter referred to as “connector”) 4 of the present invention is removed.
7). The terminal 5 of the EF joint 2 and the connector 4 of the power cable 6 are connected. The connection work process is shown in detail in the following (1) to (5).
[0045]
(1) Select the electrode part of the connector according to the terminal shape of the EF joint selected from multiple companies. For example, in this embodiment, the EF joint of company A is used, and the first electrode that matches the EF joint of company A is selected.
[0046]
(2) In order to facilitate the selection, the electrode part of the connector (connector insertion part) is color-coded. This ensures that the electrodes are not mistaken.
[0047]
(3) The connector insertion portion of the first electrode of the selected connector is inserted into the insertion portion of the terminal of the EF joint of Company A. Thereby, the male electrode of the terminal of the EF joint of company A is inserted into the first electrode, and the power cable is connected to the EF joint of company A. Since the first electrode and the second electrode of the connector are arranged symmetrically on both sides of the connector body, the energization control device for the electric fusion joint according to the present invention has an upper portion of the EF joint as shown in FIG. If the operator places the selected first electrode on the lower terminal of the connector and holds the connector, the first electrode can be easily inserted into the terminal of the lower EF joint.
[0048]
(4) When the first electrode is inserted into the terminal of the lower EF joint, the electrode guard rod in the first electrode is pushed by the male electrode of the terminal of the EF joint of company A. What is the first electrode? It is pushed into the second electrode on the opposite side, the second electrode is closed, and the inner surface of the second electrode is not exposed. Thus, it is prevented that a person or the like touches the electrode directly to receive an electric shock. Furthermore, since the electrode guard rods block the electrode space on the non-connected side, foreign matter such as mud becomes difficult to enter, and increase in contact resistance between the electrode of the connector and the terminal is prevented, and contained in mud and the like. Rust on the electrode surface due to moisture is prevented.
[0049]
(5) Since the energization control device for an electrofusion joint according to the present invention includes a mechanism for preventing erroneous insertion (including error), a connector that does not meet the standards and a terminal of an EF joint are not erroneously connected. .
[0050]
8). The barcode label 16 is read by the barcode reader 15.
9. Press the fusion start button of the power supply control device 1.
10. Fusion (energization).
11. The connector 4 is removed from the joint terminal 5.
12 Attach a rubber cover to the connector 4.
13. Hold by cooling.
14 To the next EF joint fusion process.
[0051]
【The invention's effect】
As described above, according to the present invention, the following useful effects are brought about.
(1) Since the electrodes of the connector are arranged symmetrically across the connector body, it is possible to easily select the electrode to be used, and even the terminal electrodes of electrofusion joints of various shapes can be mistaken. Without selection, and the power cable can be connected to the electric fusion joint. Also, joints from different manufacturers can be used together, and electrofusion bonding can be performed by the same energization control device.
(2) Since an adapter is not used by providing a connector with a plurality of electrodes, it is possible to quickly perform electrofusion bonding without replacing the adapter or the like. Also, the connector itself is very small and it is very easy to connect to the terminal.
(3) Since an electric shock prevention function using a simple mechanism called an electrode guard rod is provided, the risk of electric shock can be eliminated and safety can be ensured without increasing the size of the connector. Furthermore, foreign matters such as mud are difficult to enter by the electrode guard rod closing the electrode space on the non-connection side. As a result, an increase in contact resistance between the electrodes of the connector and the terminal is prevented, and rusting of the electrode surface due to moisture contained in mud or the like is prevented.
(4) By defining the shape and dimensions of the electrode of the connector electrode portion and the connector insertion port, it is possible to prevent erroneous connection to the terminal of the non-connection-side electrofusion joint.
[Brief description of the drawings]
FIG. 1 is a plan view of a connector according to an embodiment of the present invention.
FIG. 2 is a side view of the connector according to the embodiment of the present invention.
FIG. 3 is a side view showing an electrode guard rod according to an embodiment of the present invention.
FIG. 4 is an explanatory diagram showing a connection between an energization control device and an electric fusion joint according to an embodiment of the present invention.
FIG. 5 is a cross-sectional view showing a state where the first electrode of the connector according to the embodiment of the present invention is connected to the terminal of the first electrofusion joint (manufactured by Company A).
FIG. 6 is a cross-sectional view showing a state where the second electrode of the connector according to the embodiment of the present invention and the terminal of the second electrofusion joint (manufactured by B company) are connected.
FIG. 7 is a cross-sectional view showing a state in which the first electrode of the connector according to the embodiment of the present invention and the terminal of the second electrofusion joint (manufactured by B company) cannot be connected.
FIG. 8 is a cross-sectional view showing a state in which the second electrode of the connector according to the embodiment of the present invention and the terminal of the first electrofusion joint (manufactured by Company A) cannot be connected.
FIG. 9 is an explanatory view showing an embodiment of the present invention in which a thermoplastic resin pipe is fusion-bonded using an electric fusion joint.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Electric conduction control device 2 Electric fusion joint 21 Electric fusion joint 22 of company A Electric fusion joint 3 of company B Pipe 4 Connector 4a Connector main body 5 Terminal 51 Terminal 52 of electric fusion joint 21 of company A Electricity of company B Terminal 6 of fusion joint 22 Power cable 7 First electrode 8 Second electrode 9 Stopper 9a, 9b Hole 10 Electrode guard rod 10a Large diameter portion 10b of electrode guard rod Small diameter portion 10c of electrode guard rod Central portion 11 of electrode guard rod Male electrode 12 Terminal insertion part 13 Male electrode 14 Terminal insertion part 15 Bar code reader 16 Bar code label 17 Connector insertion part 18 of the first electrode Connector insertion part of the second electrode

Claims (4)

電気融着継手と樹脂管とを接合する際に用いる電気融着継手用通電制御装置において、種類が異なる２つの電極を有するコネクターを備え、前記コネクターは前記２つの電極が前記コネクターの本体を挟んだ両側に対称に配置されており、前記２つの電極はめす状の電極からなり、前記２つの電極内には、前記電極内を塞いで感電を防止するための電極ガード棒が、前記２つの電極内において摺動可能に配されていることを特徴とする電気融着継手用通電制御装置。An electrification control device for an electric fusion joint used for joining an electric fusion joint and a resin pipe, comprising a connector having two electrodes of different types, wherein the two electrodes sandwich the main body of the connector The two electrodes are formed of female electrodes, and electrode guard rods for blocking the electrodes and preventing electric shock are provided in the two electrodes. An energization control device for an electrofusion joint, characterized in that it is slidably arranged in an electrode . 電気融着継手と樹脂管とを接合する際に用いる電気融着継手用通電制御装置において、種類が異なる２つの電極を有するコネクターを備え、前記コネクターは前記２つの電極が前記コネクターの本体を挟んだ両側に対称に配置されており、前記コネクターは前記電極の周囲に配された非導電体からなるコネクター差込部を備え、前記コネクター差込部の形状は、非接続側の電気融着継手のターミナルに設けられたターミナル被差込部に嵌合できない形状であることを特徴とする電気融着継手用通電制御装置。An electrification control device for an electric fusion joint used for joining an electric fusion joint and a resin pipe, comprising a connector having two different types of electrodes, wherein the two electrodes sandwich the main body of the connector The connector is provided with a connector insertion part made of a non-conductor disposed around the electrode, and the shape of the connector insertion part is a non-connection-side electric fusion joint. An energization control device for an electrofusion joint, which has a shape that cannot be fitted into a terminal insertion portion provided in the terminal. 電気融着継手と樹脂管とを接合する際に用いる電気融着継手用通電制御装置において、種類が異なる２つの電極を有するコネクターを備え、前記２つの電極はめす状の電極からなり、前記２つのめす状電極は前記コネクターの本体を挟んだ両側に対称に配置されており、一方のめす状電極には、前記電極内を塞いで感電を防止するための電極ガード棒の一方側が、他方のめす状電極には前記電極ガード棒の他方側が、前記２つのめす状電極内において摺動可能に配され、前記一方のめす状電極が前記電気融着継手のターミナルのおす状の電極に差し込まれるときは、前記おす状電極によって押された前記電極ガード棒の他方側によって前記他方のめす状電極内が塞がれることを特徴とする、電気融着継手用通電制御装置。  In the energization control device for an electrofusion joint used when joining an electrofusion joint and a resin pipe, the electrofusion joint energization control device includes a connector having two electrodes of different types, and the two electrodes comprise female electrodes, Two female electrodes are arranged symmetrically on both sides of the connector body, and one female electrode has one side of an electrode guard rod for blocking the inside of the electrode to prevent electric shock, and the other female electrode. In the female electrode, the other side of the electrode guard rod is slidably arranged in the two female electrodes, and the one female electrode is inserted into the male electrode of the terminal of the electrofusion joint. When this is the case, the other female electrode is closed by the other side of the electrode guard rod pushed by the male electrode. 前記コネクターは、前記めす状電極の周囲に配された非導電体からなるコネクター差込部を備え、前記電気融着継手のターミナルは、前記コネクター差込部を差し込むための、非導電体からなる凹状のターミナル被差込部を備え、前記ターミナルのおす状電極は、前記ターミナル被差込部内に設けられており、前記ターミナルのおす状電極は、前記一方のめす状電極と嵌合可能な一方のおす状電極、又は、前記他方のめす状電極と嵌合可能な他方のおす状電極であり、前記一方のめす状電極の内径は、前記他方のめす状電極の内径よりも大径となっており、前記一方のめす状電極の周囲の前記コネクター差込部の外径は、前記他方のおす状電極が設けられた前記ターミナル被差込部の内径よりも大径となっており、かくして、前記一方のめす状電極が前記他方のおす状電極に誤って差し込まれることがないようになっている、請求項３記載の電気融着継手用通電制御装置。The connector includes a connector insertion portion made of a non-conductor disposed around the female electrode, and a terminal of the electric fusion joint is made of a non-conductor for inserting the connector insertion portion. A concave terminal insertion portion, the male electrode of the terminal is provided in the terminal insertion portion, and the male electrode of the terminal can be fitted with the one female electrode. A male electrode or the other female electrode that can be fitted with the other female electrode, and the inner diameter of the first female electrode is larger than the inner diameter of the other female electrode. The outer diameter of the connector insertion portion around the one female electrode is larger than the inner diameter of the terminal insertion portion provided with the other male electrode, and thus , One female Electrode is made so as not be inserted by mistake vinegar-like electrodes of the other, electrification control apparatus for an electric welding joint according to claim 3, wherein.
JP2002128331A 2002-04-30 2002-04-30 Energization control device for electric fusion joint Expired - Lifetime JP3861741B2 (en)

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