JP2004187421A

JP2004187421A - Temporary arm metal for power transmission steel tower

Info

Publication number: JP2004187421A
Application number: JP2002352432A
Authority: JP
Inventors: Kazumi Hatakeyama; 和美畠山; Minoru Shizukuishi; 稔雫石; Koji Murata; 功二村田; Hitoshi Goto; 均後藤; Teiichiro Igarashi; 貞一郎五十嵐; Yoshitoku Hatakeyama; 良徳畠山; Ryoji Sato; 良治佐藤
Original assignee: Yurtec Corp
Current assignee: Yurtec Corp
Priority date: 2002-12-04
Filing date: 2002-12-04
Publication date: 2004-07-02
Anticipated expiration: 2022-12-04
Also published as: JP4218012B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a temporary arm metal for a power transmission steel tower which can be applied to a power transmission steel tower of a tension-proof type. <P>SOLUTION: The temporary arm metal for a power transmission steel tower is constituted of a bottom support 5 having two sticks 5a which are fixed to two facing horizontal members 45, respectively, below an arm metal 15 of a surface on which the arm metal 15 of a power transmission steel tower 13 is not arranged, a top support 3 having one stick 3a which is mounted over two facing horizontal members 17 above the arm metal 15 of a surface on which the arm metal 15 of the power transmission steel tower 13 is arranged, two stick-shaped lower temporary arm metal members 9 which are retained linked with ends of the sticks 5a of the bottom support 5, respectively, stretched in the stretching direction of the arm metal 15 and longer than the length of the arm metal 15, one stick-shaped upper temporary arm metal member 7 retained linked with ends of the stick 3a of the top support 3 stretched in the stretching direction of the arm metal 15 and longer than the length of the arm metal 15, and a power transmission line retaining member 11 arranged at a tip wherein the three temporary arm metal members 7, 9 are aggregated and by which a power transmission line is retained. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、送電鉄塔に関する作業時に、送電線を送電鉄塔の腕金に代わって支持する送電鉄塔用仮腕金に関する。
【０００２】
【従来の技術】
送電鉄塔の建て替えなどを行う場合、送電線への通電を止める時間、つまり停電時間をできるだけ短くする必要があるため、送電鉄塔の建て替えなどの作業は、できる限り送電線に通電した状態で行われる。したがって、作業時の作業者の安全を確保するため、送電線と作業者との間に所定の距離を置く離隔が必要となる。
【０００３】
これに対して、従来は、送電鉄塔の腕金の延在方向に延在し、送電鉄塔の腕金よりも長く延びた１本の棒状の鋼材または四角柱状に組んだ鋼材からなる仮腕金を送電鉄塔に取り付け、この仮腕金に送電線を支持させることで、送電線と作業者との離隔を行っている。このような送電鉄塔に取り付けられる従来の送電鉄塔用仮腕金では、送電鉄塔用仮腕金の先端部に碍子を懸架し、この碍子の下端に設けられたフックに送電線を吊り下げることで、送電線を送電鉄塔の位置から遠ざけ、作業者と送電線との離隔を行っている（例えば、特許文献１参照）。
【０００４】
【特許文献１】
特開２００１−１１２１３１号公報（第２−４頁、第１図）
【発明が解決しようとする課題】
ところで、送電鉄塔の腕金による送電線の支持方式には、懸垂型支持方式と耐張型支持方式とがある。懸垂型支持方式は、一連の送電線の一部を腕金の先端部から垂下された碍子の一端に掛けて吊り下げたものである。一方、耐張型支持方式は、２本の送電線の端部を腕金の先端部に、この先端部の両側方側から各々碍子を介して掛け、２本の送電線をジャンパーで電気的に接続するものである。したがって、懸垂型支持方式では、送電鉄塔の間隔などに関係なく送電鉄塔の腕金には、送電線の荷重が均等にかかる。しかし、耐張型支持方式では、両側の隣り合う送電鉄塔との間隔などが異なると、送電鉄塔の腕金には、荷重により一方の送電線がこの送電線側に引っ張る力と、他方の送電線がこの送電線側に引っ張る力とに差が生じる。つまり、耐張型支持方式では、送電鉄塔の腕金が、左右方向に異なる張力がさようすることになる。
【０００５】
したがって、従来の棒状または四角柱状の送電鉄塔用仮腕金は、左右方向で均等に張力が作用する懸垂型支持方式に用いることはできたが、左右方向で異なる張力が作用する耐張型支持方式の場合には強度の問題から用い難い。このため、従来の送電鉄塔用仮腕金では、耐張型支持方式の送電鉄塔の場合、腕金の両側に掛けられた送電線を通常のジャンパ線よりも長いジャンパ線で接続して、送電鉄塔用仮腕金の先端部に懸架された碍子に吊り下げることで、懸垂型支持方式と同じ支持状態とするか、または、仮の鉄塔などを施工し、この仮の鉄塔で送電線を支持している。しかし、従来の送電鉄塔用仮腕金を用いる場合には、送電線の送電鉄塔用仮腕金の取る付け作業が煩雑であり、また、仮の送電鉄塔を設置する場合には、仮の送電鉄塔を設置するという煩雑な作業が生じるのに加えて、現在鉄塔が設置され送電線の経路以外の場所に仮の送電鉄塔を設置するための用地を確保しなければならないなどといった問題が生じている。
【０００６】
本発明の課題は、耐張型支持方式の送電鉄塔に適用できる送電鉄塔用仮腕金を提供することにある。
【０００７】
【課題を解決するための手段】
本発明の送電鉄塔用仮腕金は、送電鉄塔の腕金が設けられた部分の下部に取り付けられる下側支持部材と、送電鉄塔の腕金が設けられた部分の上部に取り付けられる上側支持部材と、下側支持部材に支持されて腕金よりも長い棒状の下側の仮腕金部材と、上側支持部材に支持されて腕金よりも長い棒状の上側の仮腕金部材と、これら複数の仮腕金部材が角錐状に集合した先端部に取り付けられて送電線が支持される送電線支持部材とを備えた構成とすることにより上記課題を解決する。
【０００８】
このような構成とすることにより、複数の仮腕金部材が鉄塔に取り付けられた送電鉄塔の腕金以下の部分に取り付けられる下側支持部材及び腕金以上の部分に取り付けられる上側支持部材で支持される。そして、下側支持部材及び上側支持部材で支持された複数の仮腕金部材が角錐を形成して送電鉄塔の腕金を囲った状態で設置される。これにより、送電鉄塔用仮腕金が、送電鉄塔の腕金と同様の構造で送電鉄塔に取り付けられた状態となり、送電鉄塔用仮腕金の強度が向上して送電鉄塔の腕金と同様の強度を有した状態となる。したがって、耐張型支持方式で送電鉄塔用仮腕金の左右方向での張力に差がある場合でも、送電鉄塔用仮腕金は、送電線を支持することができる。すなわち、耐張型支持方式の送電鉄塔に適用できる送電鉄塔用仮腕金を提供できる。
【０００９】
ところで、鉄塔の腕金が設けられた部分の主柱材には、主柱材に斜材や水平材を組み付けるためのプレート状部材やステップなどがあるため、主柱材には、下側支持部材及び上側支持部材を取り付けるスペースが確保し難い場合がある。そこで、下側支持部材は、送電鉄塔の腕金が設けられた部分の下側に位置する水平材に取り付けられ、上側支持部材送電鉄塔の腕金が設けられた部分の上側に位置する水平材に取り付けられる構成とする。このような構成とすれば、水平部材には、ステップやプレート状部材などが設けられていないため、送電鉄塔に下側支持部材及び上側支持部材を取り付けて、送電鉄塔用仮腕金を送電鉄塔に容易に固定することができる。
【００１０】
さらに、送電鉄塔の腕金が設けられていない面の腕金の下側に位置する２つの対向する水平材に各々固定される２本の棒状部を有する下側支持部材と、送電鉄塔の腕金が設けられている面の腕金の上側に位置する２つの対向する水平材を跨いで載置される１本の棒状部を有する上側支持部材と、下側支持部材の棒状部の端部に各々連結されて支持され、腕金の延在方向に延在して腕金の長さよりも長い２本の棒状の下側の仮腕金部材と、上側支持部材の棒状部の端部に連結されて支持され、腕金の延在方向に延在して腕金の長さよりも長い１本の棒状の上側の仮腕金部材と、これら３本の仮腕金部材が集合した先端部に設けられて送電線が支持される送電線支持部材とを備えた構成とする。
【００１１】
このような構成とすれば、送電鉄塔の水平材を利用して三角錐形状に形成された仮腕金部材が送電鉄塔の腕金を囲んだ状態に設置できるため、耐張型支持方式の送電鉄塔に適用できる強度を保ちながら、仮腕金部材の構成を簡素化できる。
【００１２】
また、上側の仮腕金部材は、伸縮してこの仮腕金部材の長さを調整する伸縮部を有し、一端部でこの仮腕金部材が上下方向に回動可能に上側支持部材に連結され、他端部で上下方向に回動可能に送電線支持部材に連結されており、下側の仮腕金部材は、一端部でこの仮腕金部材が横方向に回動可能に前記下側支持部材に連結され、他端部で横方向に回動可能に送電線支持部材に連結されている構成とする。このような構成とすれば、上側の仮腕金部材の長さと、上側支持部材及び下側支持部材に支持された各々の仮腕金部材の角度とを調整でき、仮腕金部材で形成される角錐の大きさを調整できる。このため、規格が異なる送電鉄塔の腕金に対応することができるため、送電鉄塔用仮腕金に汎用性を与ることができるので好ましい。
【００１３】
また、送電線支持部材は、水平方向に両側に張り出して各々貫通穴が形成された水平プレート部と、垂直方向に垂下されて貫通穴が形成された垂直プレート部とが形成されている構成とする。これにより、１つの送電鉄塔用仮腕金で懸垂型支持方式と耐張型支持方式の両方の方式で送電線を支持できるので好ましい。
【００１４】
さらに、上側支持部材、下側支持部材、及び仮腕金部材が各々鋼管で形成されている構成とすれば、組み立てや取り付け作業を簡素化できるので好ましい。
【００１５】
【発明の実施の形態】
以下、本発明を適用してなる送電鉄塔用仮腕金の一実施形態について図１乃至図８を参照して説明する。図１は、本発明を適用してなる送電鉄塔用仮腕金の概略構成を送電鉄塔に取り付けた状態で示す側面図である。図２は、本発明を適用してなる送電鉄塔用仮腕金の上側支持部材と上側の仮腕金部材との概略構成を示す平面図である。図３は、本発明を適用してなる送電鉄塔用仮腕金の下側支持部材と下側の仮腕金部材との概略構成を示す平面図である。図４は、本発明を適用してなる送電鉄塔用仮腕金の下側支持部材の概略構成を示す（ａ）は平面図、（ｂ）は底面図、（ｃ）は断面図である。図５は、本発明を適用してなる送電鉄塔用仮腕金の架線プレートの概略構成を示す（ａ）は平面図、（ｂ）は側面図、（ｃ）は正面図である。図６は、本発明を適用してなる送電鉄塔用仮腕金を送電鉄塔に取り付けたところを説明する側面図である。図７は、本発明を適用してなる送電鉄塔用仮腕金を送電鉄塔に取り付けたところを説明する平面図である。図８は、本発明を適用してなる送電鉄塔用仮腕金を送電鉄塔の上段の腕金部分及び中段の腕金部分に取り付けた状態を説明する側面図である。
【００１６】
本実施形態の送電鉄塔用仮腕金１は、図１に示すように、上側支持部材３、下側支持部材５、上側支持部材３の両側に取り付けられた１本ずつの上側の仮腕金部材７、下側支持部材５の両側に取り付けられた２本ずつの下側の仮腕金部材９、そして上側の仮腕金部材７と下側の仮腕金部材９とが形成する三角錐の先端部に取り付けられて送電線支持部材となる架線プレート１１などで構成されている。なお、本実施形態では、１本の上側の仮腕金部材７、２本の下側の仮腕金部材９、そして架線プレート１１は、上側支持部材３と下側支持部材５とを挟んで対称に上側支持部材３と下側支持部材５とに取り付けられている。そして、上側の仮腕金部材７、下側の仮腕金部材９、そして架線プレート１１は、両側とも同じ構成である。ただし、上側の仮腕金部材７、下側の仮腕金部材９、そして架線プレート１１は、上側支持部材３と下側支持部材５とを挟んで対称に取り付けられている必要はなく、例えば片側だけに取り付けられた構成などにすることもできる。
【００１７】
上側支持部材３は、図１及び図２に示すように、上側支持部材の棒状部となる１本の円筒状の鋼管からなる鋼管部３ａの両端部寄りの部分に、各々、鋼材からなるバンド３ｂで山形鋼からなる補強部３ｃを取り付けたものである。鋼管部３ａの両端部には、面の中央部分に貫通穴が形成された平板状の連結プレート３ｄが各々設けられている。補強部３ｃは、Ｌ字状の断面において一辺を形成する部分の外面を鋼管部３ａに向けて、そして、他の一辺を形成する部分の外面を鋼管部３ａの端部側に向け、鋼管部３ａの延在方向と９０度で交わる方向に延在させて、補強部３ｃの中央部分が鋼管部３ａに接触した状態で、各々鋼管部３ａに取り付けられている。
【００１８】
２つの補強部３ｃは、Ｌ字状の断面を有する補強部３ｃの鋼管部３ａに接触しない側の辺を形成する部分の外面間の間隔を、送電鉄塔用仮腕金１を取り付ける送電鉄塔１３の腕金１５の上側部分に位置する山形鋼からなる水平材１７の送電鉄塔１３の内側に向いた面間の間隔に調整した状態で、バンド３ｂをボルト３ｅとボルト３ｅに対応するナット３ｆとで補強部３ｃに固定することで、鋼管部３ａに取り付けられている。また、鋼管部３ａは、連結プレート３ｄの面が側方に向いた状態、つまり連結プレート３ｄの面が鋼管部３ａの延在方向と９０度で交わる方向に向いた状態で補強部３ｃに取り付けられている。
【００１９】
上側の仮腕金部材７は、２本の円筒状の鋼管部７ａ、７ｂで形成されている。鋼管部７ａ、７ｂは、各々、一端に鍔状に形成されたフランジ７ｃ、７ｄを有し、他端に断面がＵ字状に形成されて各面の中央部分に図示していない貫通穴が形成された連結アーム７ｅ、７ｆを有している。２本の鋼管部７ａ、７ｂは、フランジ７ｃ、７ｄを対向させた状態で、フランジ７ｃ、７ｄに等間隔に形成された図示していない複数の貫通穴に挿通されたボルト１９と、ボルト１９に対応するナット２１で連結されている。そして、鋼管部７ａのフランジ７ｃ、鋼管部７ｂのフランジ７ｄ、そしてボルト１９及びナット２１により、上側の仮腕金部材７の長さを伸縮させて調整する伸縮部２３が形成されている。このように伸縮部２３を介して連結した鋼管部７ａと鋼管部７ｂなどからなる仮腕金部材７の長さは、送電鉄塔用仮腕金１を取り付ける送電鉄塔１３の腕金１５を形成する上側の斜めに取り付けられた山形鋼の長さよりも長くなっている。
【００２０】
伸縮部２３は、フランジ７ｃ、７ｄに、各々、等間隔に形成された複数の貫通穴に挿通された各ボルト１９に対して３つずつのナット２１ａ、２１ｂ、２１ｃを螺合させることで、フランジ７ｃ、７ｄ間の間隔を調整し、仮腕金部材７の長さを調整するものである。例えば、ボルト１９がフランジ７ｃの連結アーム７ｅ側の面側からフランジ７ｃの図示していない貫通穴に挿通されているとき、フランジ７ｄと対向する面側にナット２１ａを締め込むことで、ボルト１９の頭部とナット２１ａでフランジ７ｃが挟まれ、ボルト１９がフランジ７ｃに固定される。
【００２１】
フランジ７ｃに固定されたボルト１９の軸部に２つ目のナット２１ｂを取り付けた状態で、ボルト１９の軸部をフランジ７ｄのフランジ７ｃに対向する面側からフランジ７ｄの貫通穴に挿通し、フランジ７ｄの連結アーム７ｆ側の面側に突出したボルト１９の軸部に３つ目のナット２１ｃを螺合させる。そして、フランジ７ｄの連結アーム７ｆ側の面側に在るナット２１ｃを締め付けることで、フランジ７ｄのフランジ７ｃに対向する面側に在るナット２１ｂとフランジ７ｄの連結アーム７ｆ側の面側に在るナット２１ｃとで、フランジ７ｄが挟まれ、フランジ７ｄがボルト１９に固定される。このとき、フランジ７ｄのフランジ７ｃに対向する面側に在るナット２１ｂの位置により、フランジ７ｃ、７ｄ間の間隔が決まり、仮腕金部材７の長さが決まる。
【００２２】
本実施形態では、上側の仮腕金部材７を形成する鋼管部７ａの連結アーム７ｅに上側支持部材３の連結プレート３ｄが挿入され、各々の図示していない貫通穴を位置合わせした状態で、回転軸となるボルト２４が鋼管部７ａの連結アーム７ｅと上側支持部材３の連結プレート３ｄの図示していない貫通穴に挿通される。鋼管部７ａの連結アーム７ｅの外面から突出したボルト２４の軸部には、ボルト２４に対応する図示していないナットが螺合される。これにより、上側支持部材３が送電鉄塔１３に取り付けられた状態で、上側の仮腕金部材７が上下方向に回動可能に上側支持部材３に連結される。また、上側の仮腕金部材７を形成する鋼管部７ｂの連結アーム７ｆには、架線プレート１１が連結される。
【００２３】
下側支持部材５は、図１、図３及び図４に示すように、下側支持部材の棒状部となる円筒状の鋼管からなる鋼管部５ａに、複数の連結板５ｂを介して鋼管部５ａと同方向に延在する山形鋼からなる取付部５ｃを取り付けたもの２つを１組として構成されている。また、各鋼管部５ａの両端部には、各々、面の鋼管部５ａの中心線上に対応する位置に貫通穴２５が形成された平板状の連結プレート５ｄが設けられている。取付部５ｃは、断面がＬ字状の取付部５ｃの内面に適宜の間隔をおいて、この内面と直角に設けられた複数の連結板５ｂを介し、Ｌ字状の断面の一辺を形成する部分が鋼管部５ａの断面の中心点を通る線上に延在して、かつ、この部分の端縁が鋼管部５ａに接した状態で、鋼管部５ａに取り付けられている。
【００２４】
取付部５ｃの、Ｌ字状の断面の鋼管部５ａに接していない側の辺を形成する部分には、この部分の端縁寄りに、この端縁に沿って複数の貫通穴２７が形成されている。連結プレート５ｄは、取付部５ｃの貫通穴２７が形成されている部分の面と面を平行にした状態で設けられている。また、連結プレート５ｄは、取付部５ｃの貫通穴２７が形成されている部分と同方向に張り出した部分を有しており、この部分には、張り出した方向に沿って、つまり鋼管部５ａの延在方向に直角な方向に沿って複数の貫通穴２９が形成されている。
【００２５】
２つの鋼管部５ａは、各々の対応する端部の連結プレート５ｄに設けられた張り出した部分間に渡された山形鋼や帯状の鋼材などを適宜組み合わせて棒状に形成した連結材５ｅによって連結される。２本の連結材５ｅの両端部には、連結プレート５ｄの貫通穴２９に対応する位置に図示していない貫通穴が形成されており、連結プレート５ｄと連結材５ｅとは、連結プレート５ｄの貫通穴２９と、連結材５ｅの図示していない貫通穴に挿通されたボルト３１とボルト３１に対応するナットとによって固定される。これにより、下側支持部材５は、２つの鋼管部５ａ、そして２つの鋼管部５ａを連結する連結材５ｅなどからなる枠状に形成されている。
【００２６】
下側の仮腕金部材９は、１本の円筒状の鋼管部９ａ、鋼管部９ａの両端に設けられた断面がＵ字状に形成されて各面の中央部分に貫通穴が形成された連結アーム９ｂ、９ｃなどで形成されている。この仮腕金部材９の長さは、送電鉄塔用仮腕金１を取り付ける送電鉄塔１３の腕金１５を形成する下側の水平に取り付けられた山形鋼の長さよりも長くなっている。一方の連結アーム９ｂには図示していない１つの貫通穴が、他方の連結アーム９ｃには、鋼管部９ａの延在方向に並ぶ図示していない２つの貫通穴が形成されている。
【００２７】
そして、仮腕金部材９の連結アーム９ｂに下側支持部材５の連結プレート５ｄが挿入され、連結プレート５ｄの貫通穴２５と仮腕金部材９の連結アーム９ｂの図示していない貫通穴を位置合わせした状態で、回転軸となるボルト２４が連結アーム９ｄの１方の外面側から挿通される。連結アーム９ｄの他方の外面側に突出したボルト２４の軸端部には、ボルト２４に対応する図示していないナットが螺合される。このように２つの下側支持部材５の各々に仮腕金部材９が連結されることにより、下側支持部材５が送電鉄塔１３に取り付けられた状態で、下側の仮腕金部材９が横方向に回動可能に下側支持部材５に連結される。また、下側の仮腕金部材９の連結アーム９ｃには、架線プレート１１が連結される。
【００２８】
架線プレート１１は、図５に示すように、略方形の平板状で、両長辺側の縁部が連続する複数の円弧形状に形成された水平プレート部１１ａ、水平プレート部１１ａの一面側に、この面の長辺に沿う中心線上に直角に突設された楔形の平板状の上側垂直プレート部１１ｂ、そして水平プレート部１１ａの他面側に、この面の長辺に沿う中心線上に直角に突設された略方形の平板状の下側垂直プレート部１１ｃなどで形成されている。
【００２９】
水平プレート部１１ａは、本実施形態では、各々の長辺側の縁部に４つの円弧状に突出した部分を対称な形状で有しており、各々の円弧の中心点に対応する部分には、貫通穴が形成されている。片側の縁部に設けられた４つの貫通穴のうち、両端側の２つの貫通穴と、中央に位置する貫通穴のうちの一方の貫通穴は、円形の貫通穴３１となっている。そして、中央に位置する貫通穴のうちの他方の貫通穴は、隣り合う端側の貫通穴３１を中心点とする円弧状の貫通穴３３となっている
上側垂直プレート部１１ｂは、楔の先端側が水平プレート部１１ａの一方の短辺側縁部に位置し、楔の頭側が水平プレート部１１ａの他方の短辺側縁部から張り出した状態となっている。この水平プレート部１１ａの他方の短辺側縁部から張り出した楔の頭側の端部は円弧状に形成されており、この端部の円弧の中心点に対応する位置に貫通穴３５が形成されている。下側垂直プレート部１１ｃは、水平プレート部１１ａの対向する短辺側縁部の間に設けられており、下側垂直プレート部１１ｃの延在方向に沿って、等間隔で３つの貫通穴３７が形成されている。
【００３０】
このような架線プレート１１は、図３に示すように、水平プレート部１１ａの両側の、円弧状の貫通穴３３と貫通穴３３に隣り合う端側の貫通穴３１とが形成された部分を、各々、下側の仮腕金部材９の連結アーム９ｃに挿入する。仮腕金部材９の連結アーム９ｃの鋼管部９ａ側に位置する図示していない貫通穴と、架線プレート１１の水平プレート部１１ａの端部側に位置する貫通穴３１とを位置合わせし、仮腕金部材９の連結アーム９ｃのもう一方の図示していない貫通穴と、架線プレート１１の円弧状の貫通穴３３とを位置合わせして、各々にボルト２４を挿通して、ボルト２４の軸の端部にボルト２４に対応する図示していないナットを螺合させる。
【００３１】
これにより、下側の仮腕金部材９は、架線プレート１１の水平プレート部１１ａの面に沿う面内で回動可能に架線プレート１１と連結される。なお、下側の仮腕金部材９の回動範囲は、架線プレート１１の水平プレート部１１ａに形成された円弧状の貫通穴３３の長さによって決まる。また、本実施形態では、腕金部材９の連結アーム９ｃの上側に来る面上に断面Ｌ字状で、架線プレート１１の隣り合う貫通穴３１、３３に対応する位置に、対応する形状の貫通穴を形成した板材３９を、Ｌ字状の断面の１辺を形成する部分の外面が架線プレート１１の上側垂直プレート部１１ｂの面に接するように、ボルト２４により取り付けている。
【００３２】
一方、架線プレート１１の楔状に形成された上側垂直プレート部１１ｂの頭側の端部は、図１に示すように、上側の仮腕金部材７を形成する鋼管部７ｂの連結アーム７ｆに挿入される。上側の仮腕金部材７を形成する鋼管部７ｂの連結アーム７ｆの図示していない貫通穴と、架線プレート１１の上側垂直プレート部１１ｂの貫通穴３５とを位置合わせしてボルト２４を挿通し、ボルト２４の軸部にボルト２４に対応する図示していないナットを螺合させる。これにより、上側の仮腕金部材７は、架線プレート１１の上側垂直プレート部１１ｂの面に沿う面内で回動可能に架線プレート１１と連結される。
【００３３】
なお、本実施形態では、図１乃至図４に示すように、下側支持部材５の鋼管部５ａの外側側面、上側の仮腕金部材７の鋼管部７ａ、７ｂの両側面、そして下側の仮腕金部材９の鋼管部９ａの両側面に各々等間隔でステップを取り付けるためのねじが切られた穴を有するステップ台座４１が設けられている。ステップ台座４１には、ボルト状で軸端部にステップ台座４１に対応するねじが切られたステップ４３が螺合され取り付けられている。
【００３４】
このような構成の送電鉄塔用仮腕金の設置方法と本発明の特徴部について説明する。本実施形態の送電鉄塔用仮腕金１を設置する場合、図１乃至図３に示すように、鋼管部３ａと補強部３ｃなどで形成される上側支持部材３、鋼管部５ａと連結材５ｅなどで枠状に形成される下側支持部材５を各々組み立てる。さらに、架線プレート１１の上側の仮腕金部材７と下側の仮腕金部材９とを連結しておく。組み立てた上側支持部材３は、送電鉄塔用仮腕金１を設置する送電鉄塔１３の腕金１５の位置に釣り上げ、図１及び図２に示すように、腕金１５の上側で、腕金１５が設置されている送電鉄塔１３の面の水平材１７上に、鋼管部３ａが腕金の延在方向に延在した状態に設置する。なお、上側支持部材３の補強材３ｃと送電鉄塔１３の水平材１７とは、必要に応じてボルトなどを用いて固定する。
【００３５】
一方、組み立てた下側支持部材５は、送電鉄塔用仮腕金１を設置する送電鉄塔１３の腕金１５の位置に釣り上げ、図１及び図３に示すように、腕金１５の下側で、送電鉄塔１３の腕金１５が設置されていない面の水平材４５に、取付部５ｃを固定することで設置する。このとき、送電鉄塔１３の水平材４５には、予め取付部５ｃの貫通穴２７に対応する位置に貫通穴を形成しておく。そして、送電鉄塔１３の水平材４５に形成した貫通穴と下側支持部材５の取付部５ｃに形成した貫通穴２７とを位置合わせして固定用のボルト４７を挿通し、ボルト４７に対応する図示していないナットを螺合させることで、下側支持部材５を送電鉄塔１３に固定する。
【００３６】
架線プレート１１に上側の仮腕金部材７と下側の仮腕金部材９とを連結したものは、三脚様に開閉が可能であるため、上側の仮腕金部材７と下側の仮腕金部材９とを閉じて畳んだ状態で、送電鉄塔１３の腕金１５の位置に釣り上げる。そして、上側の仮腕金部材７と下側の仮腕金部材９とを開き、上側の仮腕金部材７の連結アーム７ｅに上側支持部材３の連結プレート３ｄを挿入し、ボルト２４と図示していないナットで上側支持部材３に上側の仮腕金部材７を連結する。また、２本の下側の仮腕金部材９の連結アーム９ｂに、各々対応する下側支持部材５の連結プレート５ｄを挿入し、ボルト２４と図示していないナットで下側支持部材５に２本の下側の仮腕金部材９を連結する。この状態で、２本の下側の仮腕金部材９が水平になっていない場合には、上側の仮腕金部材７の伸縮部２３により上側の仮腕金部材７の長さを調整し、２本の下側の仮腕金部材９を水平にする。この状態で、必要に応じて各ボルト２４と図示していないナットとを締め付ける。
【００３７】
このようにして送電鉄塔用仮腕金１が取り付けられると、図１及び図６に示すように、１本の上側の仮腕金部材７と２本の下側の仮腕金部材９によって、２本の下側の仮腕金部材９が水平な状態の三角錐が、送電鉄塔１３の腕金１５を囲った状態となり、１本の上側の仮腕金部材７と２本の下側の仮腕金部材９からなる三角錐は、送電鉄塔１３の腕金１５よりも長く水平に張りだした状態となる。送電鉄塔用仮腕金１の実際の取付作業を行ったときの取付所用時間は、１方向の仮腕金当たり１時間もかからず数十分程度であった。
【００３８】
このように取り付けられた送電鉄塔用仮腕金１に、送電鉄塔１３の腕金１５に支持されている架空送電線４７を送電鉄塔用仮腕金１に掛け替える。このとき、図６に示すように、架空送電線４７が耐張型支持方式で支持される場合、架空送電線４７が取り付けられた碍子４９の架空送電線４７が取り付けられていない側の端部に設けられたフックを、例えば図３に示すような架線プレート１１の水平プレート部１１ａの先端側に上側垂直プレート部１１ｂを挟んで対称に位置する貫通穴３１に掛ける。なお、架線プレート１１の水平プレート部１１ａの先端側に上側垂直プレート部１１ｂを挟んで対称に位置する貫通穴３１に各々掛けられた２本の架空送電線４７は、図６に示すように、ジャンパ５１で電気的に接続されている。また、図６では、送電鉄塔１３の上段の腕金１５部分に送電鉄塔用仮腕金１を取り付けた場合を示している。
【００３９】
一方、図示していないが、架空送電線４７が懸垂型支持方式で支持される場合、架線プレート１１の下側垂直プレート部１１ｃに形成された貫通穴３７に、鋼材からなる吊り環を通して掛け、この吊り環に碍子を介して架空送電線を吊り下げる。このように架線プレート１１は、１つで、懸垂型支持方式と耐張型支持方式の両方の支持方式に対応できる。
【００４０】
このように送電鉄塔用仮腕金１に架空送電線４７を支持させることにより、図７に示すように、建て替えようとする既設の送電鉄塔１３の位置で、この送電鉄塔１３に取り付けられた送電鉄塔用仮腕金１によって、送電鉄塔１３の両側に支持されていた架空送電線４７が、各々、送電鉄塔１３の腕金１５に支持されていたときよりも外側に拡がった状態となる。これにより、新しく設置する送電鉄塔５３は、腕金５５の先端部分でも架空送電線４７とは、離隔された状態となっており、送電線４７が通電された活線状態であっても、送電鉄塔５３の設置作業を安全に行うことができる。なお、図７の破線は、建て替えを行う送電鉄塔１３の腕金１５に架空送電線４７が支持されていたときの架空送電線４７の位置を示す。
【００４１】
ところで、図６に例示した送電鉄塔１３の中段の腕金５７は、水平に張りだした長さが上段の腕金１５よりもほぼ倍の長さになっている。そして、送電鉄塔１３の上段の腕金１５部分に用いた送電鉄塔用仮腕金１は、送電鉄塔１３の中段の腕金５７と水平方向に張り出した長さがほぼ同じになっている。このため、送電鉄塔１３の上段の腕金１５部分に用いた送電鉄塔用仮腕金１は、送電鉄塔１３の中段の腕金５７部分に用いることはできない。
【００４２】
このような場合には、送電鉄塔１３の中段の腕金５７部分に用いるために、腕金５７を形成する上側に位置する山形鋼や下側に位置する山形鋼よりも長い、上側の仮腕金部材７や下側の仮腕金部材９を備えた送電鉄塔用仮腕金１を用いる。送電鉄塔１３の上段の腕金１５部分と中段の腕金５７部分に各々対応する長さの上側の仮腕金部材７や下側の仮腕金部材９を備えた送電鉄塔用仮腕金１を取り付けた状態を図８に示す。
【００４３】
また、送電鉄塔１３の下段の腕金５９は、水平に張りだした長さは上段の腕金１５と同じであるが、腕金５９の送電鉄塔１３を形成する主柱材６１側の部分における高さ方向の幅が腕金１５よりも広くなっている。本実施形態の送電鉄塔用仮腕金１では、上側の仮腕金部材７が上側支持部材３と架線プレート１１に上下方向に回動自在に取り付けられており、２本の下側の仮腕金部材９が、各々下側支持部材５と架線プレート１１に横方向に回動可能に取り付けられている。つまり、上側の仮腕金部材７と２本の下側の仮腕金部材９とが、互いに直角に交わる面内で回動可能である。さらに、上側の仮腕金部材７は、伸縮部２３を有しており、長さの調整が可能である。
【００４４】
したがって、腕金５９の主柱材６１側の部分における高さ方向の幅にもよるが、本実施形態の送電鉄塔用仮腕金１では、上側の仮腕金部材７と２本の下側の仮腕金部材９とで形成される三角錐の形状を調整可能であるため、主柱材６１側の部分における高さ方向の幅が腕金１５よりも広くなっている送電鉄塔１３の下段の腕金５９部分にも、上段の腕金１５の部分に用いた送電鉄塔用仮腕金１を用いることができる。このように、本実施形態の送電鉄塔用仮腕金１は、規格などが異なるため腕金の大きさや形状が異なる送電鉄塔に対して適用することができ汎用性を有している。また、これにより、より少ない種類の送電鉄塔用仮腕金で、より多くの送電鉄塔に対応できる。
【００４５】
ここで、本実施形態の送電鉄塔用仮腕金１の強度について検討した結果の一例を示す。図６に示すように、架空送電線４７が耐張型支持方式で支持される場合、架空送電線４７は送電鉄塔用仮腕金１の部分で分断されている。このため、この送電鉄塔用仮腕金１が取り付けられた送電鉄塔１３と隣り合う両側の送電鉄塔までの距離が異なる場合などでは、送電鉄塔用仮腕金１の架線プレート１１側から、つまり送電鉄塔用仮腕金１の先端部側から送電鉄塔用仮腕金１を見たときに送電鉄塔用仮腕金１の左右方向で斜め下方への張力、つまり送電鉄塔用仮腕金１の左右にかかる垂直荷重と水平荷重は不均一となる。このため、架空送電線４７が耐張型支持方式で支持される場合、送電鉄塔用仮腕金は、この左右不均一な荷重、つまり不平均荷重に対して耐えうる強度を有している必要がある。
【００４６】
そこで、上側支持部材３の鋼管部３ａ、下側支持部材５の鋼管部５ａ、上側の仮腕金部材７の鋼管部７ａ、そして下側の仮腕金部材９の鋼管部９ａに管径１１４．３ｍｍ、厚み３．５ｍｍの鋼管を用いて形成した、両方向に延びた仮腕金の先端部間の距離つまり両方向に延びた仮腕金に掛けられた送電線の水平線間距離が７７００ｍｍと１１７００ｍｍの２種類の送電鉄塔用仮腕金１を準備し、垂直方向載荷試験と水平方向載荷試験を行った。この結果、本実施形態の送電鉄塔用仮腕金１は、２トン程度の不平均荷重に十分に耐えうることがわかった。したがって、この強度に関する結果と送電線の種類やその張力などから、本発明を適用してなる送電鉄塔用仮腕金は、耐張型支持方式の送電鉄塔に適用できることがわかった。
【００４７】
さらに、上側支持部材３の鋼管部３ａ、下側支持部材５の鋼管部５ａ、上側の仮腕金部材７の鋼管部７ａ、そして下側の仮腕金部材９の鋼管部９ａなど棒状部に用いる鋼材の形態について検討を行った。等辺山形鋼材を用いた場合と、本実施形態のような中空鋼管材を用いた場合とを比較したところ、表１のような結果となった。
【００４８】
【表１】

表１に示すように、本発明を適用してなる送電鉄塔用仮腕金は、中空鋼管材に代えて等辺山形鋼材など中空鋼管材以外の鋼材を用いて送電鉄塔用仮腕金を形成することもできる。しかし、中空鋼管材を用いた方が、組み立て及び取付作業を簡素化できることに加えて、汎用性を与えるために仮腕金部材を回動及び伸縮可能な構成にし易い。
【００４９】
また、送電鉄塔用仮腕金の形状について検討を行った。仮腕金部材で形成される角錐が、四角錐の場合と本実施形態のように三角錐の場合とを比較したところ、表２のうような結果となった。
【００５０】
【表２】

表２に示すように、本発明を適用してなる送電鉄塔用仮腕金は、三角錐に代えて四角錐など他の角錐形状を有する送電鉄塔用仮腕金にすることもできる。しかし、三角錐とした方が、組み立て状態で軽量であり、また、組み立て及び取付作業を簡素化できる。さらに、汎用性を与えるための仮腕金部材を回動可能とする連結部分の構成を簡素化でき、また、１箇所の伸縮部の調整で角錐の形状の調整が可能になる。
【００５１】
このように本実施形態の送電鉄塔用仮腕金１は、上側の仮腕金部材７と２本の下側の仮腕金部材９とで三角錐を形成し、送電鉄塔１３の腕金１５を囲った状態で設置される。これにより、送電鉄塔用仮腕金１は、送電鉄塔１３の腕金１５と同様の状態で送電鉄塔１３に取り付けられ、耐張型支持方式の送電鉄塔１３で送電鉄塔用仮腕金１の左右方向での張力に差がある場合でも、送電鉄塔用仮腕金１は、架空送電線４７を支持することができる。すなわち、耐張型支持方式の送電鉄塔に適用できる送電鉄塔用仮腕金を提供できる。
【００５２】
さらに、送電鉄塔１３は、図１、図６及び図８に示すように、主柱材６１に斜材６３や水平材１７を組み合わせた構造となっており、送電鉄塔１３の腕金１５が設けられた部分の主柱材６１には、主柱材６１に斜材６３や水平材１７を組み付けるための図示していないプレート状部材や、作業用のステップなどが設けられている。このため、例えば下側支持部材及び上側支持部材などが主柱材６１を把持することで仮腕金部材を支持するような構成にすることもできるが、主柱材６１に下側支持部材及び上側支持部材で把持するためのスペースを確保することが難い場合がある。そこで、本実施形態の下側支持部材５は、送電鉄塔１３の腕金１５の下側に位置する水平材４５に取り付けられ、上側支持部材３は、送電鉄塔１３の腕金１５の上側に位置する水平材１７に取り付けられる構成とすることで、送電鉄塔の腕金部分への送電鉄塔用仮腕金の固定を容易にしている。
【００５３】
加えて、本実施形態の送電鉄塔用仮腕金１は、上側の仮腕金部材７は、伸縮してこの仮腕金部材の長さを調整する伸縮部２３を有すると共に、一端部で上下方向に回動可能に上側支持部材３に連結され、他端部で上下方向に回動可能に架線プレート１１に連結されている。２本の下側の仮腕金部材９は、各々、一端部で横方向に回動可能に下側支持部材５に連結され、他端部で横方向に回動可能に架線プレート１１に連結されている。このため、上側の仮腕金部材７の長さと、上側支持部材３に対する仮腕金部材７の上下方向の角度と、下側支持部材５に対する下側の仮腕金部材９の水平方向の角度を調整でき、仮腕金部材７、９で形成される三角錐の大きさを調整できる。このため、規格が異なる送電鉄塔の腕金に対応することができ、送電鉄塔用仮腕金に汎用性を与ることができる。
【００５４】
ところで、従来の送電鉄塔用仮腕金は、送電鉄塔製作メーカーのオリジナルの物品となっており、送電鉄塔の新設工事などを行う際、送電鉄塔用仮腕金をメーカーからリースで借りて用いている。さらに、送電鉄塔製作メーカー毎に送電鉄塔用仮腕金をリースで借りる必要がある。また、従来の送電鉄塔用仮腕金は、製品化されたものではなく、送電鉄塔に合った大きさや送電鉄塔への取り付け構造のものを、必要時にその都度製作して用いるものであり、使用後は廃棄されている。このため、送電鉄塔の建て替え作業のコストの上昇、作業効率の低下、作業に伴う廃棄物の発生といった問題が生じている。
【００５５】
これに対して、本実施形態の送電鉄塔用仮腕金１は、上側支持部材３と下側支持部材５とは、送電鉄塔への着脱が自在な構成であり、また、上側支持部材３、下側支持部材５、そして仮腕金部材７、９などの構成から汎用性があり、製品化が可能な送電鉄塔用仮腕金となっている。したがって、送電鉄塔の建て替え作業のコストを低減でき、また、作業効率を向上できる。加えて、送電鉄塔用仮腕金を用いることに伴う廃棄物の発生など抑えることができる。
【００５６】
さらに、１本の上側の仮腕金部材７と、２本の下側の仮腕金部材９で三角錐を形成して送電鉄塔１３の腕金１５を囲っているため、仮腕金部材の構成や送電鉄塔用仮腕金の組み立て及び取り付けを簡素化できる。また、汎用性を与えるための仮腕金部材を回動可能とする連結部分の構成を簡素化でき、また、１箇所の伸縮部の調整で角錐の形状の調整が可能になる。
【００５７】
加えて、上側支持部材３、下側支持部材５、及び仮腕金部材７、９が各々鋼管で形成されているため、組み立て及び取付作業を簡素化できることに加えて、汎用性を与えるために仮腕金部材を回動及び伸縮可能な構成にし易い。
【００５８】
さらに、本実施形態の送電鉄塔用仮腕金１では、送電線支持部材である架線プレート１１は、水平方向に両側に張り出して各々貫通穴が形成された水平プレート部１１ａと、垂直方向に垂下されて貫通穴が形成された下側垂直プレート部１１ｂとが形成されている。このため、１つの本実施形態の送電鉄塔用仮腕金１で、懸垂型支持方式と耐張型支持方式の両方の方式で架空送電線を支持できる。
【００５９】
また、本実施形態では、伸縮部２３は、鋼管部７ａのフランジ７ｃ、鋼管部７ｂのフランジ７ｄ、そしてボルト１９及びナット２１により形成された構成としているが、伸縮部は、上側の仮腕金部材を伸縮させ長さを調整できれば様々な構成にできる。例えば、伸縮部は、ターンバックルのような構造で構成することもできる。ただし、本実施形態の伸縮部２３のような構成であれば、コストを抑えながら伸縮部を形成することができ、また、強度も向上できる。
【００６０】
【発明の効果】
本発明によれば、耐張型支持方式の送電鉄塔に適用できる送電鉄塔用仮腕金を提供できる。
【図面の簡単な説明】
【図１】本発明を適用してなる送電鉄塔用仮腕金の一実施形態の概略構成を送電鉄塔に取り付けた状態で示す側面図である。
【図２】本発明を適用してなる送電鉄塔用仮腕金の一実施形態の上側支持部材と上側の仮腕金部材との概略構成を示す平面図である。
【図３】本発明を適用してなる送電鉄塔用仮腕金の一実施形態の下側支持部材と下側の仮腕金部材との概略構成を示す平面図である。
【図４】本発明を適用してなる送電鉄塔用仮腕金の一実施形態の下側支持部材の概略構成を示す（ａ）は平面図、（ｂ）は底面図、（ｃ）は断面図である。
【図５】本発明を適用してなる送電鉄塔用仮腕金の一実施形態の架線プレートの概略構成を示す（ａ）は平面図、（ｂ）は側面図、（ｃ）は正面図である。
【図６】本発明を適用してなる送電鉄塔用仮腕金を送電鉄塔に取り付けたところを説明する側面図である。
【図７】本発明を適用してなる送電鉄塔用仮腕金を送電鉄塔に取り付けたところを説明する平面図である。
【図８】本発明を適用してなる送電鉄塔用仮腕金を送電鉄塔の上段の腕金部分及び中段の腕金部分に取り付けた状態を説明する側面図である。
【符号の説明】
１送電鉄塔用仮腕金
３上側支持部材
３ａ鋼管部
５下側支持部材
５ａ鋼管部
７上側の仮腕金部材
９下側の仮腕金部材
１１架線プレート
１３送電鉄塔
１５腕金
１７、４５水平材
２３伸縮部[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temporary wrench for a power transmission tower that supports a power transmission line in place of a power wagon of the power transmission tower during work on the power transmission tower.
[0002]
[Prior art]
When rebuilding a power transmission tower, etc., it is necessary to minimize the time during which power to the power transmission line is stopped, that is, the power outage time.Therefore, work such as power transmission tower rebuilding is performed while power is supplied to the power transmission line as much as possible. . Therefore, in order to ensure the safety of the worker during the work, it is necessary to provide a certain distance between the transmission line and the worker.
[0003]
On the other hand, in the related art, a provisional arm made of a single rod-shaped steel material or a steel material assembled in a square pole shape that extends in the direction in which the arm of the power transmission tower extends and is longer than the arm of the power transmission tower. Is attached to the power transmission tower, and the temporary wire is supported by the power transmission line, thereby separating the power transmission line from the worker. In the conventional temporary wrench for the transmission tower attached to such a transmission pylon, an insulator is suspended at the tip of the temporary wrench for the transmission tower, and the transmission line is hung on a hook provided at the lower end of the insulator. In addition, the power transmission line is moved away from the power transmission tower to separate an operator from the power transmission line (for example, see Patent Document 1).
[0004]
[Patent Document 1]
JP 2001-112131 A (Pages 2-4, FIG. 1)
[Problems to be solved by the invention]
By the way, there are a suspension type support system and a tension type support system as a support system of the transmission line by the arm of the power transmission tower. In the suspension type support system, a part of a series of power transmission lines is hung from one end of an insulator suspended from a tip end of an arm bar and suspended. On the other hand, in the tension-type support system, the ends of the two transmission lines are hung on the tip of the arm bar via insulators from both sides of the tip, and the two transmission lines are electrically connected by jumpers. Is to be connected to. Therefore, in the suspension type support system, the load of the transmission line is uniformly applied to the arm of the transmission tower irrespective of the interval between the transmission towers. However, in the tension-type support method, if the distance between adjacent power transmission towers on the two sides is different, the arm of the power transmission tower will have a force that pulls one transmission line toward this transmission line due to the load and the other power transmission line. There is a difference between the wire pulling force toward the power transmission line. In other words, in the tension-type support system, the arms of the power transmission tower receive different tensions in the left-right direction.
[0005]
Therefore, the conventional rod-shaped or quadrangular column-shaped temporary arm for a power transmission tower could be used for a suspension type support system in which tension acts uniformly in the left-right direction, but a tension-resistant support system in which different tensions act in the left-right direction. In the case of the method, it is difficult to use it due to the problem of strength. For this reason, in the case of a conventional power transmission tower for a transmission tower, in the case of a transmission tower with a tension-type support system, the transmission lines hung on both sides of the arm are connected by a jumper wire longer than a normal jumper wire, and power transmission is performed. Hanging on the insulator suspended from the tip of the temporary steel arm for the steel tower, it can be in the same support state as the suspension type support method, or a temporary steel tower is constructed and the temporary steel tower supports the transmission line are doing. However, in the case of using the conventional transmission tower temporary armrest, the work of attaching the power transmission tower temporary armrest to the transmission line is complicated, and when the temporary transmission tower is installed, the temporary power transmission tower is temporarily installed. In addition to the troublesome work of installing a tower, there are also problems such as the fact that the tower is currently installed and it is necessary to secure a site for installing a temporary transmission tower other than the route of the transmission line. I have.
[0006]
An object of the present invention is to provide a provisional arm for a power transmission tower that can be applied to a power transmission tower of a tension-type support system.
[0007]
[Means for Solving the Problems]
The provisional arm for a power transmission tower of the present invention includes a lower support member attached to a lower portion of a portion of the transmission tower provided with the arm, and an upper support member attached to an upper portion of the portion provided with the arm of the transmission tower. A rod-shaped lower temporary arm member supported by the lower support member and longer than the arm member; a rod-shaped upper temporary arm member supported by the upper support member and longer than the arm member; The above problem is solved by providing a configuration in which a provisional arm member is attached to a tip portion of a pyramidal shape and a transmission line support member that supports a transmission line.
[0008]
With this configuration, a plurality of temporary arm members are supported by a lower support member attached to a portion of the power transmission tower attached to the tower below the arm bar and an upper support member attached to the portion of the power transmission tower above the arm bar. Is done. Then, the plurality of temporary arm members supported by the lower support member and the upper support member form a pyramid and are installed so as to surround the arm members of the power transmission tower. As a result, the transmission tower temporary armrest is attached to the transmission tower with the same structure as the power transmission tower armrest, and the strength of the power transmission tower temporary armrest is improved to be similar to the power transmission tower armrest. It becomes a state having strength. Therefore, even when there is a difference in the tension in the left-right direction of the power transmission tower temporary arm in the tension type support method, the power transmission tower temporary arm can support the transmission line. That is, it is possible to provide a provisional arm for a power transmission tower that can be applied to a power transmission tower of a tension-type support system.
[0009]
By the way, the main pillars in the part of the tower where the armrests are provided include plate-like members and steps for assembling diagonal and horizontal members to the main pillars. In some cases, it is difficult to secure a space for mounting the member and the upper support member. Therefore, the lower support member is attached to a horizontal member located below the portion of the transmission tower where the arm is provided, and the horizontal member located above the portion of the transmission tower where the arm is provided. To be attached to With such a configuration, since the horizontal member is not provided with a step or a plate-like member, the lower support member and the upper support member are attached to the power transmission tower, and the power transmission tower temporary arm is mounted on the power transmission tower. Can be fixed easily.
[0010]
Further, a lower support member having two rod-shaped portions respectively fixed to two opposed horizontal members located below the arm bar on the surface where the arm of the power transmission tower is not provided; An upper support member having one rod-like portion placed over two opposing horizontal members located above the arm member on the surface on which the gold is provided, and an end of the rod-like portion of the lower support member And two rod-shaped lower temporary arm members extending in the extending direction of the arm and longer than the length of the arm, and an end of the rod-shaped portion of the upper support member. One rod-shaped upper temporary arm member that is connected and supported, extends in the direction in which the arm metal extends, and is longer than the length of the arm metal, and a tip portion in which these three temporary arm members are assembled And a transmission line support member that is provided on the transmission line and supports the transmission line.
[0011]
With such a configuration, a temporary arm member formed in a triangular pyramid shape using the horizontal member of the power transmission tower can be installed in a state surrounding the arm of the power transmission tower. The structure of the temporary arm member can be simplified while maintaining the strength applicable to the steel tower.
[0012]
The upper temporary arm member has an extendable portion that expands and contracts to adjust the length of the temporary arm member, and the upper temporary member is rotatable up and down at one end to the upper support member. The other end is connected to the transmission line support member so as to be rotatable in the vertical direction, and the lower temporary arm member is rotatable in the lateral direction at one end. It is configured to be connected to the lower support member and connected to the transmission line support member at the other end so as to be rotatable in the lateral direction. With such a configuration, the length of the upper temporary arm member and the angle of each temporary arm member supported by the upper support member and the lower support member can be adjusted, and the temporary arm member is formed of the temporary arm member. The size of the pyramid can be adjusted. For this reason, it is possible to cope with the arm of the transmission tower having different standards, and it is preferable because the temporary arm for the transmission tower can be given versatility.
[0013]
Further, the transmission line supporting member has a configuration in which a horizontal plate portion which protrudes horizontally on both sides and has a through hole formed therein, and a vertical plate portion which is vertically hung and a through hole is formed is formed. I do. This is preferable because the transmission line can be supported by both the suspension type support system and the tension type support system with one temporary wrench for the power transmission tower.
[0014]
Further, it is preferable that the upper support member, the lower support member, and the provisional arm member are each formed of a steel pipe because assembly and mounting operations can be simplified.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a provisional arm for a power transmission tower to which the present invention is applied will be described with reference to FIGS. 1 to 8. FIG. 1 is a side view showing a schematic configuration of a provisional arm for a power transmission tower to which the present invention is applied, in a state where the provisional arm is attached to the power transmission tower. FIG. 2 is a plan view illustrating a schematic configuration of an upper support member and an upper temporary arm member of a temporary arm for a power transmission tower to which the present invention is applied. FIG. 3 is a plan view illustrating a schematic configuration of a lower support member and a lower temporary arm member for a transmission tower to which the present invention is applied. 4 (a) is a plan view, FIG. 4 (b) is a bottom view, and FIG. 4 (c) is a cross-sectional view showing a schematic configuration of a lower support member of a provisional arm for a power transmission tower to which the present invention is applied. 5 (a) is a plan view, FIG. 5 (b) is a side view, and FIG. 5 (c) is a front view showing a schematic configuration of an overhead wire plate of a temporary wrench for a power transmission tower to which the present invention is applied. FIG. 6 is a side view illustrating a state where a temporary wrench for a power transmission tower to which the present invention is applied is attached to the power transmission tower. FIG. 7 is a plan view illustrating a state in which a temporary wrench for a power transmission tower to which the present invention is applied is attached to the power transmission tower. FIG. 8 is a side view for explaining a state in which the provisional arm for the transmission tower to which the present invention is applied is attached to the upper arm part and the middle arm part of the transmission tower.
[0016]
As shown in FIG. 1, the temporary wrench 1 for a power transmission tower of the present embodiment includes an upper support member 3, a lower support member 5, and an upper temporary buckle attached to both sides of the upper support member 3. The member 7, two lower temporary arm members 9 attached to both sides of the lower support member 5, and a triangular pyramid formed by the upper temporary arm member 7 and the lower temporary arm member 9 And an overhead wire plate 11 or the like, which is attached to the distal end of the transmission line and serves as a transmission line support member. In the present embodiment, one upper temporary arm member 7, two lower temporary arm members 9, and an overhead wire plate 11 sandwich the upper support member 3 and the lower support member 5. It is symmetrically attached to the upper support member 3 and the lower support member 5. The upper temporary arm member 7, the lower temporary arm member 9, and the overhead wire plate 11 have the same configuration on both sides. However, the upper temporary arm member 7, the lower temporary arm member 9, and the overhead wire plate 11 do not need to be symmetrically attached to each other with the upper support member 3 and the lower support member 5 interposed therebetween. It is also possible to adopt a configuration attached to only one side.
[0017]
As shown in FIG. 1 and FIG. 2, the upper support member 3 has a band formed of a steel material at a portion near both ends of a steel pipe portion 3 a formed of a single cylindrical steel pipe serving as a rod-shaped portion of the upper support member. At 3b, a reinforcing portion 3c made of angle iron is attached. At both ends of the steel pipe portion 3a, a flat connection plate 3d having a through hole formed in the center of the surface is provided. The reinforcing portion 3c is configured such that an outer surface of a portion forming one side in the L-shaped cross section faces the steel pipe portion 3a, and an outer surface of a portion forming another side faces the end side of the steel pipe portion 3a. The reinforcing portions 3c are attached to the steel pipe portions 3a so as to extend in a direction intersecting at 90 degrees with the extending direction of the steel pipe portions 3a, with the central portion of the reinforcing portions 3c contacting the steel pipe portions 3a.
[0018]
The distance between the outer surfaces of the sides of the reinforcing portion 3c having the L-shaped cross section that does not contact the steel pipe portion 3a is determined by the distance between the outer surfaces of the two reinforcing portions 3c. The band 3b is bolted with the nut 3f corresponding to the bolt 3e and the horizontal member 17 made of angle iron, which is positioned on the upper part of the arm 15 of the armature 15 and adjusted to the interval between the surfaces facing the inside of the power transmission tower 13. It is attached to the steel pipe 3a by fixing to the reinforcement 3c with. The steel pipe portion 3a is attached to the reinforcing portion 3c in a state where the surface of the connection plate 3d faces sideways, that is, in a state where the surface of the connection plate 3d faces 90 degrees with the extending direction of the steel pipe portion 3a. Have been.
[0019]
The upper temporary arm member 7 is formed of two cylindrical

steel pipe portions

7a and 7b. Each of the

steel pipe portions

7a and 7b has

flanges

7c and 7d formed in a flange shape at one end, and a U-shaped cross section at the other end, and a through hole (not shown) is formed at a central portion of each surface. It has formed connecting

arms

7e and 7f. The two

steel pipe portions

7a and 7b are provided with a bolt 19 inserted through a plurality of through holes (not shown) formed at regular intervals in the

flanges

7c and 7d, with the

flanges

7c and 7d facing each other. Are connected by a nut 21 corresponding to. The flange 7c of the steel pipe portion 7a, the flange 7d of the steel pipe portion 7b, and the bolt 19 and the nut 21 form an expansion / contraction portion 23 that expands and contracts the length of the upper temporary arm member 7 to adjust. The length of the provisional arm member 7 including the steel pipe portion 7a and the steel tube portion 7b connected via the expansion and contraction portion 23 as described above forms the arm 15 of the power transmission tower 13 to which the power transmission tower provisional arm 1 is attached. It is longer than the length of the angled steel at the upper diagonal.
[0020]
The expansion and contraction portion 23 is screwed with three nuts 21a, 21b, and 21c on the

flanges

7c and 7d, respectively, with the bolts 19 inserted into the plurality of through holes formed at equal intervals. The distance between the

flanges

7c and 7d is adjusted to adjust the length of the temporary arm member 7. For example, when the bolt 19 is inserted from the surface of the flange 7c on the connection arm 7e side into the through hole (not shown) of the flange 7c, the nut 19a is tightened on the surface of the flange 7c facing the flange 7d. And the nut 21a sandwich the flange 7c, and the bolt 19 is fixed to the flange 7c.
[0021]
With the second nut 21b attached to the shaft of the bolt 19 fixed to the flange 7c, the shaft of the bolt 19 is inserted through the through hole of the flange 7d from the side of the flange 7d facing the flange 7c, A third nut 21c is screwed onto the shaft of the bolt 19 protruding from the flange 7d on the side of the connecting arm 7f. By tightening the nut 21c on the surface of the flange 7d on the side of the connecting arm 7f, the nut 21b on the surface of the flange 7d facing the flange 7c and the nut 21c on the surface of the connecting arm 7f of the flange 7d are provided. With the nut 21c, the flange 7d is sandwiched, and the flange 7d is fixed to the bolt 19. At this time, the distance between the

flanges

7c and 7d is determined by the position of the nut 21b on the side of the flange 7d facing the flange 7c, and the length of the temporary arm member 7 is determined.
[0022]
In this embodiment, the connection plate 3d of the upper support member 3 is inserted into the connection arm 7e of the steel pipe portion 7a forming the upper temporary arm member 7, and the through holes (not shown) are aligned. A bolt 24 serving as a rotating shaft is inserted into a connecting arm 7e of the steel pipe portion 7a and a through hole (not shown) of the connecting plate 3d of the upper support member 3. A nut (not shown) corresponding to the bolt 24 is screwed into the shaft of the bolt 24 protruding from the outer surface of the connecting arm 7e of the steel pipe 7a. Thus, the upper temporary arm member 7 is connected to the upper support member 3 so as to be rotatable in the vertical direction while the upper support member 3 is attached to the power transmission tower 13. The overhead wire plate 11 is connected to the connecting arm 7f of the steel pipe part 7b forming the upper temporary arm member 7.
[0023]
As shown in FIGS. 1, 3 and 4, the lower support member 5 is connected to a steel pipe part 5a made of a cylindrical steel pipe serving as a rod-shaped part of the lower support member via a plurality of connecting plates 5b. A pair of two mounting portions 5c made of angle steel extending in the same direction as 5a are configured as one set. At both ends of each steel pipe portion 5a, a flat plate-like connection plate 5d having a through hole 25 formed at a position corresponding to the center line of the steel pipe portion 5a on the surface is provided. The mounting portion 5c forms one side of the L-shaped cross section through a plurality of connecting plates 5b provided at right angles to the inner surface of the mounting portion 5c having an L-shaped cross section at appropriate intervals. The part extends on a line passing through the center point of the cross section of the steel pipe part 5a, and is attached to the steel pipe part 5a in a state where the edge of this part is in contact with the steel pipe part 5a.
[0024]
A plurality of through-holes 27 are formed along the edge near the edge of the portion of the mounting portion 5c that forms the side of the L-shaped cross section that is not in contact with the steel pipe portion 5a. ing. The connection plate 5d is provided in a state where the surface of the portion where the through hole 27 of the mounting portion 5c is formed is parallel to the surface. The connecting plate 5d has a portion that extends in the same direction as the portion where the through hole 27 of the mounting portion 5c is formed, and this portion extends along the direction in which it extends, that is, the steel pipe portion 5a. A plurality of through holes 29 are formed along a direction perpendicular to the extending direction.
[0025]
The two steel pipe sections 5a are connected by a rod-shaped connecting member 5e formed by appropriately combining angle steel, band-shaped steel, and the like passed between the overhanging portions provided on the connecting plates 5d at the corresponding ends. You. At both ends of the two connecting members 5e, through holes (not shown) are formed at positions corresponding to the through holes 29 of the connecting plate 5d, and the connecting plate 5d and the connecting member 5e are connected to each other by the connecting plate 5d. It is fixed by the through hole 29, a bolt 31 inserted into a through hole (not shown) of the connecting member 5 e, and a nut corresponding to the bolt 31. Thus, the lower support member 5 is formed in a frame shape including the two steel pipe portions 5a and the connecting member 5e that connects the two steel pipe portions 5a.
[0026]
The lower temporary arm member 9 has a single cylindrical steel pipe portion 9a, a cross section provided at both ends of the steel pipe portion 9a is formed in a U-shape, and a through hole is formed in a central portion of each surface. It is formed by connecting

arms

9b, 9c and the like. The length of the temporary arm member 9 is longer than the length of the lower, horizontally mounted angle iron that forms the arm 15 of the power transmission tower 13 to which the power transmission tower temporary arm 1 is attached. One connecting arm 9b is formed with one through hole (not shown), and the other connecting arm 9c is formed with two through holes (not shown) arranged in the extending direction of the steel pipe portion 9a.
[0027]
Then, the connection plate 5d of the lower support member 5 is inserted into the connection arm 9b of the provisional arm member 9, and the through hole 25 of the connection plate 5d and the through hole (not shown) of the connection arm 9b of the provisional arm member 9 are inserted. In the aligned state, a bolt 24 serving as a rotation shaft is inserted from one outer surface of the connection arm 9d. A nut (not shown) corresponding to the bolt 24 is screwed to a shaft end of the bolt 24 protruding to the other outer surface side of the connection arm 9d. By connecting the provisional arm member 9 to each of the two lower support members 5 in this manner, the lower provisional arm member 9 is attached to the power transmission tower 13 with the lower support member 5 attached. It is connected to the lower support member 5 so as to be rotatable in the lateral direction. The overhead wire plate 11 is connected to the connection arm 9c of the lower temporary arm member 9.
[0028]
As shown in FIG. 5, the overhead wire plate 11 has a substantially rectangular flat plate shape, a horizontal plate portion 11a formed in a plurality of arc shapes in which edges on both long sides are continuous, and one side of the horizontal plate portion 11a. A wedge-shaped plate-shaped upper vertical plate portion 11b projecting at right angles to a center line along the long side of this surface, and a right angle to the other surface side of the horizontal plate portion 11a at a center line along the long side of this surface. The lower vertical plate portion 11c of a substantially rectangular flat plate protruding from the lower plate 11c is formed.
[0029]
In the present embodiment, the horizontal plate portion 11a has four arc-shaped protruding portions at the edges on the long sides thereof in a symmetrical shape, and a portion corresponding to the center point of each arc has , Through holes are formed. Of the four through holes provided on one edge, two through holes at both ends and one of the through holes located at the center are circular through holes 31. The other of the through holes located at the center is an arc-shaped through hole 33 having the center point at the adjacent end side through hole 31.
In the upper vertical plate portion 11b, the leading end side of the wedge is located at one short side edge of the horizontal plate portion 11a, and the head side of the wedge projects from the other short side edge of the horizontal plate portion 11a. I have. The head-side end of the wedge projecting from the other short side edge of the horizontal plate portion 11a is formed in an arc shape, and a through hole 35 is formed at a position corresponding to the center point of the arc of this end portion. Have been. The lower vertical plate portion 11c is provided between the opposite short side edges of the horizontal plate portion 11a, and three through holes 37 are provided at equal intervals along the extending direction of the lower vertical plate portion 11c. Is formed.
[0030]
As shown in FIG. 3, such an overhead wire plate 11 includes, on both sides of the horizontal plate portion 11 a, portions where an arc-shaped through hole 33 and an end side through hole 31 adjacent to the through hole 33 are formed. Each is inserted into the connecting arm 9c of the lower temporary arm member 9. The through-hole (not shown) located on the steel pipe portion 9a side of the connecting arm 9c of the temporary arm member 9 and the through-hole 31 located on the end side of the horizontal plate portion 11a of the overhead wire plate 11 are aligned. The other through-hole (not shown) of the connecting arm 9c of the arm member 9 is aligned with the arc-shaped through-hole 33 of the overhead wire plate 11, and the bolt 24 is inserted into each of the through-holes. Is screwed into a nut (not shown) corresponding to the bolt 24.
[0031]
Thus, the lower temporary arm member 9 is rotatably connected to the overhead wire plate 11 in a plane along the surface of the horizontal plate portion 11a of the overhead wire plate 11. The rotation range of the lower temporary arm member 9 is determined by the length of the arc-shaped through hole 33 formed in the horizontal plate portion 11a of the overhead wire plate 11. Further, in the present embodiment, an L-shaped cross section is formed on a surface of the arm member 9 that is on the upper side of the connection arm 9c, and a through hole of a corresponding shape is formed at a position corresponding to the adjacent through

holes

31 and 33 of the overhead wire plate 11. The plate member 39 having the hole is attached by the bolt 24 so that the outer surface of the portion forming one side of the L-shaped cross section is in contact with the surface of the upper vertical plate portion 11b of the overhead wire plate 11.
[0032]
On the other hand, the head end of the upper vertical plate portion 11b formed in a wedge shape of the overhead wire plate 11 is inserted into a connecting arm 7f of a steel pipe portion 7b forming an upper temporary arm member 7, as shown in FIG. Is done. The through-hole (not shown) of the connecting arm 7f of the steel pipe portion 7b forming the upper temporary arm member 7 is aligned with the through-hole 35 of the upper vertical plate portion 11b of the overhead wire plate 11, and the bolt 24 is inserted therethrough. Then, a nut (not shown) corresponding to the bolt 24 is screwed into the shaft of the bolt 24. Thus, the upper temporary arm member 7 is rotatably connected to the overhead wire plate 11 in a plane along the surface of the upper vertical plate portion 11b of the overhead wire plate 11.
[0033]
In this embodiment, as shown in FIGS. 1 to 4, the outer side surface of the steel pipe portion 5 a of the lower support member 5, the both side surfaces of the

steel pipe portions

7 a and 7 b of the upper temporary arm member 7, and the lower side A step pedestal 41 having threaded holes for attaching steps at equal intervals is provided on both side surfaces of the steel pipe portion 9a of the temporary arm member 9. The step pedestal 41 has a bolt-shaped step 43 corresponding to the step pedestal 41 at the shaft end and screwed thereto.
[0034]
A method for installing a temporary wrench for a transmission tower having such a configuration and features of the present invention will be described. When the provisional arm 1 for a power transmission tower according to the present embodiment is installed, as shown in FIGS. 1 to 3, the upper support member 3 formed by the steel pipe portion 3a and the reinforcing portion 3c, the steel pipe portion 5a and the connecting member 5e The lower supporting member 5 formed in a frame shape is assembled by, for example, each. Furthermore, the temporary arm member 7 on the upper side of the overhead wire plate 11 and the temporary arm member 9 on the lower side are connected. The assembled upper support member 3 is caught at the position of the arm 15 of the power transmission tower 13 where the provisional arm 1 for the power transmission tower is installed, and as shown in FIGS. The steel pipe portion 3a is installed on the horizontal member 17 on the surface of the power transmission tower 13 where is installed in a state where the steel pipe portion 3a extends in the extending direction of the arm. The reinforcing member 3c of the upper support member 3 and the horizontal member 17 of the power transmission tower 13 are fixed using bolts or the like as necessary.
[0035]
On the other hand, the assembled lower support member 5 is lifted to the position of the arm 15 of the power transmission tower 13 where the temporary arm 1 for the power transmission tower is installed, and as shown in FIGS. The mounting part 5c is fixed to the horizontal member 45 on the surface of the power transmission tower 13 where the arm 15 is not installed. At this time, a through hole is previously formed in the horizontal member 45 of the power transmission tower 13 at a position corresponding to the through hole 27 of the mounting portion 5c. Then, the through-hole formed in the horizontal member 45 of the power transmission tower 13 and the through-hole 27 formed in the mounting portion 5c of the lower support member 5 are aligned, and a fixing bolt 47 is inserted therethrough. The lower support member 5 is fixed to the power transmission tower 13 by screwing a nut (not shown).
[0036]
Since the upper temporary arm member 7 and the lower temporary arm member 9 are connected to the overhead wire plate 11 and can be opened and closed like a tripod, the upper temporary arm member 7 and the lower temporary arm are connected. With the metal member 9 closed and folded, the fish is picked up to the position of the arm 15 of the power transmission tower 13. Then, the upper temporary arm member 7 and the lower temporary arm member 9 are opened, the connection plate 3d of the upper support member 3 is inserted into the connection arm 7e of the upper temporary arm member 7, and the bolt 24 and the figure are inserted. The upper temporary arm member 7 is connected to the upper support member 3 with a nut not shown. Also, the connection plates 5d of the corresponding lower support members 5 are inserted into the connection arms 9b of the two lower temporary arm members 9 respectively, and the bolts 24 and nuts (not shown) are used to connect the lower support members 5 to the lower support member 5. The two lower temporary arm members 9 are connected. In this state, when the two lower temporary arm members 9 are not horizontal, the length of the upper temporary arm member 7 is adjusted by the elastic portion 23 of the upper temporary arm member 7. The two lower temporary arm members 9 are made horizontal. In this state, the bolts 24 and nuts (not shown) are tightened as necessary.
[0037]
When the provisional arm 1 for the power transmission tower is attached in this manner, as shown in FIGS. 1 and 6, one provisional arm member 7 on the upper side and two provisional arm members 9 on the lower side The triangular pyramid with the two lower temporary arm members 9 in a horizontal state surrounds the arm 15 of the power transmission tower 13, one upper temporary arm member 7 and two lower arm members 9. The triangular pyramid formed by the provisional arm member 9 extends horizontally longer than the arm 15 of the power transmission tower 13. The time required for the installation site when the temporary installation arm 1 for the power transmission tower was actually mounted was several tens of minutes, not less than one hour per temporary installation arm in one direction.
[0038]
The overhead power transmission line 47 supported by the arm 15 of the power transmission tower 13 is replaced with the power transmission tower temporary arm 1 attached to the power transmission tower temporary arm 1 thus attached. At this time, as shown in FIG. 6, when the overhead power transmission line 47 is supported by the tension-type support method, the end of the insulator 49 to which the overhead power transmission line 47 is attached, on the side where the overhead power transmission line 47 is not attached. Is hooked on a through-hole 31 symmetrically located on the tip side of the horizontal plate portion 11a of the overhead wire plate 11 as shown in FIG. 3 with the upper vertical plate portion 11b interposed therebetween. As shown in FIG. 6, the two overhead transmission lines 47 respectively hung in the through-holes 31 symmetrically located on the tip side of the horizontal plate portion 11a of the overhead wire plate 11 with the upper vertical plate portion 11b interposed therebetween, as shown in FIG. They are electrically connected by a jumper 51. FIG. 6 shows a case in which the provisional arm 1 for the power transmission tower is attached to the upper arm 15 of the power transmission tower 13.
[0039]
On the other hand, although not shown, when the overhead power transmission line 47 is supported by the suspension type support system, a suspension ring made of steel is passed through a through-hole 37 formed in the lower vertical plate portion 11c of the overhead wire plate 11, An overhead transmission line is suspended from the suspension ring via an insulator. As described above, the single overhead wire plate 11 can support both the suspension type support system and the tension type support system.
[0040]
By supporting the overhead power transmission line 47 on the provisional arm 1 for the power transmission tower in this way, as shown in FIG. 7, the power transmission attached to the power transmission tower 13 at the position of the existing power transmission tower 13 to be rebuilt. The overhead transmission wires 47 supported on both sides of the power transmission tower 13 by the provisional arm 1 for the power transmission tower are each expanded to a more outward position than when the overhead power transmission lines 47 are supported by the arm 15 of the power transmission tower 13. Thus, the newly installed power transmission tower 53 is separated from the overhead power transmission line 47 even at the tip of the arm 55, and even if the transmission line 47 is in a live state where power is supplied, The installation work of the steel tower 53 can be performed safely. The broken line in FIG. 7 indicates the position of the overhead transmission line 47 when the overhead transmission line 47 is supported by the arm 15 of the transmission tower 13 to be rebuilt.
[0041]
By the way, the middle arm bar 57 of the transmission tower 13 illustrated in FIG. 6 has a horizontally extended length substantially twice as long as the upper arm bar 15. The power transmission tower provisional arm 1 used for the upper arm 15 of the power transmission tower 13 has substantially the same length as the middle arm 57 of the power transmission tower 13 in the horizontal direction. For this reason, the power transmission tower provisional arm 1 used for the upper arm 15 of the power transmission tower 13 cannot be used for the middle arm 57 of the power transmission tower 13.
[0042]
In such a case, the upper temporary arm, which is longer than the upper angle iron and the lower angle iron that forms the arm 57, is used for the middle arm 57 of the transmission tower 13. The temporary arm 1 for a power transmission tower provided with the gold member 7 and the lower temporary arm member 9 is used. Temporary arm 1 for a power transmission tower provided with an upper temporary arm member 7 and a lower temporary arm member 9 having a length corresponding to the upper arm member 15 and the middle arm member 57 of the power transmission tower 13, respectively. FIG. 8 shows a state in which is attached.
[0043]
The lower arm 59 of the power transmission tower 13 has the same length as the upper arm 15 extending horizontally, but the lower arm 59 of the arm 59 on the side of the main pillar 61 forming the power transmission tower 13. The width in the height direction is wider than the arm 15. In the transmission tower temporary arm 1 of the present embodiment, the upper temporary arm member 7 is attached to the upper support member 3 and the overhead wire plate 11 so as to be vertically rotatable, and the two lower temporary arms are provided. The gold member 9 is attached to the lower support member 5 and the overhead wire plate 11 so as to be rotatable in the lateral direction. That is, the upper temporary arm member 7 and the two lower temporary arm members 9 are rotatable in a plane perpendicular to each other. Further, the upper temporary arm member 7 has an elastic portion 23, and its length can be adjusted.
[0044]
Therefore, although it depends on the width in the height direction of the part of the arm 59 on the side of the main pillar 61, in the temporary arm 1 for a power transmission tower according to the present embodiment, the upper temporary arm member 7 and the two lower arms are used. Since the shape of the triangular pyramid formed with the temporary arm member 9 can be adjusted, the lower part of the power transmission tower 13 in which the width in the height direction at the portion of the main pillar 61 is wider than the arm 15 The provisional arm 1 for the power transmission tower used for the upper arm 15 can also be used for the arm 59. As described above, the provisional arm 1 for a power transmission tower of the present embodiment can be applied to power transmission towers having different sizes and shapes of the power arms because of different standards and the like, and has versatility. In addition, with this, it is possible to cope with a larger number of power transmission towers with a smaller number of provisional arms for the power transmission tower.
[0045]
Here, an example of the result of examining the strength of the provisional arm 1 for the power transmission tower of the present embodiment will be described. As shown in FIG. 6, when the overhead power transmission line 47 is supported by the tension-type support method, the overhead power transmission line 47 is divided at the portion of the temporary wrench 1 for the power transmission tower. For this reason, when the distance between the power transmission tower 13 on which the power transmission tower temporary arm 1 is mounted and the adjacent power transmission tower is different, for example, from the overhead wire plate 11 side of the power transmission tower temporary arm 1, When the power transmission tower temporary arm 1 is viewed from the tip side of the power tower temporary arm 1, the tension of the power transmission tower temporary arm 1 is obliquely downward in the left-right direction, that is, the left and right of the power transmission tower temporary arm 1. The vertical load and the horizontal load applied are uneven. For this reason, when the overhead power transmission line 47 is supported by the tension-type support method, the provisional arm for the power transmission tower needs to have a strength that can withstand the non-uniform load on the left and right, that is, the non-average load. There is.
[0046]
Therefore, the steel pipe portion 3a of the upper support member 3, the steel pipe portion 5a of the lower support member 5, the steel pipe portion 7a of the upper temporary arm member 7, and the steel pipe portion 9a of the lower temporary arm member 9 have a pipe diameter 114. The distance between the tips of the provisional arm members extending in both directions, that is, the distance between the horizontal lines of the transmission lines hung on the provisional arm members extending in both directions is 7700 mm and 11700 mm. Were prepared, and a vertical loading test and a horizontal loading test were performed. As a result, it was found that the provisional arm 1 for a power transmission tower of the present embodiment can sufficiently withstand an average load of about 2 tons. Therefore, from the result regarding the strength, the type of the transmission line, the tension thereof, and the like, it was found that the provisional arm for the transmission tower to which the present invention was applied can be applied to the transmission tower of the tension-support type.
[0047]
Further, the steel pipe portion 3a of the upper support member 3, the steel pipe portion 5a of the lower support member 5, the steel pipe portion 7a of the upper temporary arm member 7, and the steel pipe portion 9a of the lower temporary arm member 9 are formed into rod-like portions. The form of the steel material used was studied. Table 1 shows the results of comparison between the case using the equilateral angle steel and the case using the hollow steel pipe as in the present embodiment.
[0048]
[Table 1]

As shown in Table 1, a temporary arm for a power transmission tower to which the present invention is applied forms a temporary arm for a power transmission tower using a steel material other than a hollow steel pipe material such as an equilateral angle steel instead of a hollow steel pipe material. You can also. However, using a hollow steel tube material can simplify the assembling and mounting operations, and also allows the provisional arm member to easily rotate and expand and contract to provide versatility.
[0049]
In addition, the shape of the temporary arm for the transmission tower was studied. When the pyramid formed by the provisional arm member is a quadrangular pyramid and a triangular pyramid as in the present embodiment, the result is as shown in Table 2.
[0050]
[Table 2]

As shown in Table 2, the temporary wrench for a power transmission tower to which the present invention is applied may be a temporary wrench for a power transmission tower having another pyramid shape such as a quadrangular pyramid instead of the triangular pyramid. However, the triangular pyramid is lighter in the assembled state, and can simplify the assembling and mounting work. Furthermore, the configuration of the connecting portion that allows the provisional arm member to be rotatable for giving versatility can be simplified, and the shape of the pyramid can be adjusted by adjusting one expansion and contraction portion.
[0051]
As described above, the power transmission tower temporary arm 1 of the present embodiment forms a triangular pyramid with the upper temporary arm member 7 and the two lower temporary arm members 9, and the arm 15 of the power transmission tower 13. It is installed in a state surrounding. Thereby, the power transmission tower temporary arm 1 is attached to the power transmission tower 13 in the same state as the arm 15 of the power transmission tower 13, and the left and right sides of the power transmission tower temporary arm 1 are supported by the tension-supported power transmission tower 13. Even if there is a difference in the tension in the directions, the provisional arm 1 for the power transmission tower can support the overhead power transmission line 47. That is, it is possible to provide a provisional arm for a power transmission tower that can be applied to a power transmission tower of a tension-type support system.
[0052]
1, 6 and 8, the power transmission tower 13 has a structure in which a main pillar 61 is combined with a diagonal member 63 and a horizontal member 17, and the arm 15 of the power transmission tower 13 is provided. The main column member 61 in the portion provided is provided with a plate-shaped member (not shown) for assembling the diagonal member 63 and the horizontal member 17 to the main column member 61, a work step, and the like. For this reason, for example, the lower support member and the upper support member may be configured to support the provisional arm member by gripping the main column member 61, but the main support member 61 may be configured to support the provisional arm member. It may be difficult to secure a space for gripping by the upper support member. Therefore, the lower support member 5 of the present embodiment is attached to a horizontal member 45 located below the arm 15 of the power transmission tower 13, and the upper support member 3 is located above the arm 15 of the power transmission tower 13. The structure is attached to the horizontal member 17 to facilitate fixing of the power transmission tower temporary arm to the arm of the power transmission tower.
[0053]
In addition, the temporary iron arm for power transmission tower 1 of the present embodiment has an upper temporary arm member 7 having an elastic portion 23 that expands and contracts to adjust the length of the temporary arm member, and has a vertical end at one end. The other end portion is connected to the overhead wire plate 11 so as to be rotatable vertically. The two lower temporary arm members 9 are each connected to the lower supporting member 5 at one end so as to be rotatable in the lateral direction, and are connected to the overhead wire plate 11 at the other end so as to be rotatable in the horizontal direction. Have been. Therefore, the length of the upper temporary arm member 7, the vertical angle of the temporary arm member 7 with respect to the upper support member 3, and the horizontal angle of the lower temporary arm member 9 with respect to the lower support member 5. Can be adjusted, and the size of the triangular pyramid formed by the

provisional arm members

7 and 9 can be adjusted. For this reason, it is possible to cope with the arm of the transmission tower having different standards, and it is possible to give versatility to the provisional arm for the transmission tower.
[0054]
By the way, the conventional transmission tower temporary arm is an original article of the transmission tower manufacturing maker, and when performing new construction of the transmission tower, etc., it is used by renting the transmission tower temporary arm from the manufacturer by lease. I have. In addition, it is necessary for each power transmission tower manufacturer to borrow a temporary wrench for the power transmission tower. In addition, the conventional temporary wrench for the power transmission tower is not a product, but is manufactured and used whenever necessary, with a size suitable for the power transmission tower and a mounting structure to the power transmission tower when necessary. The rest has been discarded. For this reason, there have been problems such as an increase in the cost of rebuilding the power transmission tower, a reduction in work efficiency, and generation of waste accompanying the work.
[0055]
On the other hand, the power transmission tower temporary arm 1 of the present embodiment is configured such that the upper support member 3 and the lower support member 5 can be freely attached to and detached from the power transmission tower. The configuration of the lower support member 5 and the

temporary arm members

7 and 9 is versatile and is a temporary arm for a power transmission tower that can be commercialized. Therefore, the cost of the work of rebuilding the transmission tower can be reduced, and the work efficiency can be improved. In addition, it is possible to suppress the generation of waste due to the use of the temporary wrench for the power transmission tower.
[0056]
Furthermore, since one upper temporary arm member 7 and two lower temporary arm members 9 form a triangular pyramid and surround the arm 15 of the power transmission tower 13, the temporary arm member The structure and assembly and installation of the temporary arm for the transmission tower can be simplified. In addition, the configuration of the connecting portion that allows the provisional arm member to be rotatable for giving versatility can be simplified, and the shape of the pyramid can be adjusted by adjusting one expansion / contraction portion.
[0057]
In addition, since the upper support member 3, the lower support member 5, and the

provisional arm members

7, 9 are each formed of a steel pipe, in addition to simplifying the assembly and mounting work, it is necessary to provide versatility. It is easy to make the provisional arm member rotatable and extendable.
[0058]
Further, in the temporary iron wire for a transmission tower 1 of the present embodiment, the overhead wire plate 11 as a transmission line supporting member extends horizontally to both sides and has a horizontal plate portion 11a having through holes formed therein, and a vertical hanging direction. And a lower vertical plate portion 11b in which a through hole is formed. For this reason, the power transmission tower temporary arm 1 of the present embodiment can support the overhead transmission line by both the suspension type support system and the tension type support system.
[0059]
Further, in the present embodiment, the elastic portion 23 has a configuration formed by the flange 7c of the steel pipe portion 7a, the flange 7d of the steel pipe portion 7b, and the bolt 19 and the nut 21. Various configurations can be provided if the length can be adjusted by expanding and contracting the members. For example, the expansion and contraction portion may be configured with a structure like a turnbuckle. However, with the configuration like the elastic portion 23 of the present embodiment, the elastic portion can be formed while suppressing the cost, and the strength can be improved.
[0060]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the provisional arm for a power transmission tower applicable to the power transmission tower of a tension type support system can be provided.
[Brief description of the drawings]
FIG. 1 is a side view showing a schematic configuration of an embodiment of a temporary wrench for a power transmission tower to which the present invention is applied, in a state where the temporary arm is attached to the power transmission tower.
FIG. 2 is a plan view showing a schematic configuration of an upper support member and an upper temporary arm member of an embodiment of a temporary iron arm for a power transmission tower to which the present invention is applied.
FIG. 3 is a plan view showing a schematic configuration of a lower support member and a lower temporary arm member according to an embodiment of the present invention.
4 (a) is a plan view, FIG. 4 (b) is a bottom view, and FIG. 4 (c) is a cross-sectional view showing a schematic configuration of a lower support member of an embodiment of a provisional arm for a power transmission tower to which the present invention is applied. FIG.
5 (a) is a plan view, FIG. 5 (b) is a side view, and FIG. 5 (c) is a front view showing a schematic configuration of an overhead wire plate of one embodiment of a temporary arm for a power transmission tower to which the present invention is applied. is there.
FIG. 6 is a side view illustrating a state where a provisional arm for a power transmission tower to which the present invention is applied is attached to the power transmission tower.
FIG. 7 is a plan view illustrating a state in which a provisional arm for a power transmission tower to which the present invention is applied is attached to the power transmission tower.
FIG. 8 is a side view for explaining a state in which a provisional arm for a power transmission tower to which the present invention is applied is attached to an upper arm part and a middle arm part of a power transmission tower.
[Explanation of symbols]
1 Temporary arm for power transmission tower
3 Upper support member
3a Steel pipe section
5 Lower support member
5a Steel pipe section
7. Upper temporary arm member
9 Lower temporary arm member
11 Overhead wire plate
13 Transmission tower
15 Arms
17, 45 horizontal material
23 Telescopic part

Claims

A lower support member attached to the lower part of the power transmission tower provided with the arm, an upper support member attached to the upper part of the power transmission tower provided with the arm, and supported by the lower support member A bar-shaped lower temporary arm member longer than the arm bar, a rod-shaped upper temporary arm member supported by the upper support member and longer than the arm bar, and the plurality of temporary arm members formed into a pyramid shape; A temporary arm for a power transmission tower, comprising: a power transmission line support member attached to a front end portion where the power transmission line is supported.

The lower support member is attached to a horizontal member located below a portion of the power transmission tower provided with the arm bar, and a horizontal member located above the portion of the upper support member power transmission tower provided with the arm bar. The temporary arm for a power transmission tower according to claim 1, wherein the temporary arm is attached to a power transmission tower.

A lower support member having two rod-shaped portions respectively fixed to two opposed horizontal members positioned below the arm of the power transmission tower on which the arm is not provided; An upper support member having one rod-like portion that is placed across two opposing horizontal members located above the arm of the surface provided, and an end of the rod-like portion of the lower support member The two lower rod-shaped provisional arm members, each connected and supported, extending in the extending direction of the arm, and being longer than the length of the arm, and the end of the rod-shaped portion of the upper support member. A rod-shaped upper temporary arm member that is connected and supported, extends in the direction in which the arm arm extends, and is longer than the length of the arm metal, and a tip portion where the three temporary arm members are assembled And a transmission line supporting member for supporting the transmission line provided on the transmission line.

The upper temporary arm member has an extendable portion that expands and contracts to adjust the length of the temporary arm member, and the upper temporary member is rotatable vertically at one end to the upper support member. The other end is connected to the transmission line support member so as to be rotatable in the vertical direction, and the lower temporary arm member is laterally rotatable at one end. The power transmission according to any one of claims 1 to 3, wherein the power transmission member is connected to the lower support member, and the other end portion is connected to the power transmission line support member so as to be rotatable in a lateral direction. Temporary arm for steel tower.

The transmission line supporting member is characterized in that a horizontal plate portion that protrudes horizontally on both sides to form a through hole and a vertical plate portion that vertically hangs down and a through hole is formed are formed. The provisional arm for a transmission tower according to any one of claims 1 to 4.