JP4268745B2

JP4268745B2 - Electric wire insulation protective tube terminal fixture

Info

Publication number: JP4268745B2
Application number: JP2000266092A
Authority: JP
Inventors: 清棚橋; 敬秋山
Original assignee: 名伸電機株式会社
Priority date: 2000-09-01
Filing date: 2000-09-01
Publication date: 2009-05-27
Anticipated expiration: 2020-09-01
Also published as: JP2002084612A

Description

【０００１】
【発明の属する技術分野】
本発明は、架設電線に被着した電線絶縁保護管の端末を高所作業車等を使用して、電線等に直接手を触れずに固定させる電線絶縁保護管の端末固定具の改良に関するものである。
【０００２】
【従来の技術】
従来、電柱間等に架設された電線は樹木や建造物に近接した個所にあると風による樹木や建造物の一部が接触して損傷したり、或いは、架設工事等に際してはクレーン車のクレーンが接触するなどして損傷し易く、これにより感電事故等を起こすことがあった。そこで、これを防止するために電線に電線絶縁保護管を被着するようにしている。その際、電線に被着した電線絶縁保護管の端末を電線に固定しておかないと電線絶縁保護管が電線上を移動して必要個所を被覆する目的を達し得ないため、電線絶縁保護管に設けられた孔に引掛具を係止させ該引掛具に紐やゴムバンド等を掛止すると共に電線に結束させたり、引掛具を使用しないで帯状片を直接電線絶縁保護管にらせん状に巻回すると共に電線に巻き付けるようにして電線絶縁保護管を固定する手段が講じられていた。しかしながら、このような従来の固定手段はすべて架線上での高所でしかも手作業で行なわれているために感電事故を惹起するおそれがあるばかりか作業に手間が掛かり極めて危険であった。
【０００３】
また、電線に被着した２本の電線絶縁保護管を互いに連結すると共に、これらの電線絶縁保護管を位置ずれを起こすことなく固定させる管継手が例えば特開昭６２−７１４１４号公報に開示され知られているが、この管継手を使用することで前記した従来の問題点はかなり改善されるもののなお煩わしい多くの手作業が必要であった。
【０００４】
そこで、出願人は、このような作業を高所作業車等を使用し、しかも絶縁性に富んだ遠隔操作棒を用いて電線に直接手を触れずに電線絶縁保護管を電線に簡単に固定することができ、また、感電事故をも防止し得る電線絶縁保護管の端末固定具を特開平５−２５２６２７号公報に開示されるように出願した。即ち、この発明に係る電線絶縁保護管の端末固定具ａは、図９及び図１０に示すように、主幹１０２の上下両端にそれぞれ水平腕部１０３，１０４を突出させて側面コ形状をなす本体部材１０１を形成し、前記上側の水平腕部１０３の一側に電線絶縁保護管Ｄに掛止する掛止腕片１０５及び抑止片１０６を突設し、前記下側の水平腕部１０４には前記主幹１０２と平行に配置されかつ回動しつつ自在に上下動するねじ棒１０７を螺着し、該ねじ棒１０７の上端と上側の水平腕部１０３との間を電線挟持部１０８とした構成よりなる。そして、ねじ棒１０７の下端には、下面で開口した円筒形状の係止碗状体１０９を一体に形成し、該係止碗状体１０９の外周壁両側に下端で開口するＴ形状の係止溝１１０を対向させて設けている。
【０００５】
一方、図１０に示すように遠隔操作棒１１１は、円柱状をなしその先端が前記係止碗状体１０９に嵌脱自在に嵌入される外径を有し、その外周面の先端両側部にそれぞれ前記一対の係止溝１１０に係合する係合ピン１１２を突設している。そこで、端末固定具ａのねじ棒１０７を緩め下げて電線挟持部１０８を拡げた状態にする。そして、係止碗状体１０９に遠隔操作棒１１１の先端部を嵌入させ各係合ピン１１２を係止碗状体１０９の各係止溝１１０に係合させ遠隔操作棒１１１に端末固定具ａが抜脱しないように支持する。この状態で、遠隔操作棒１１１を高所作業車から高く差し上げて端末固定具ａの電線挟持部１０８に電線Ｗを挿通する。次いで、端末固定具ａの掛止腕片１０５と抑止片１０６を電線保護管Ｄの端縁に係止し、遠隔操作棒１１１そのものを手で回動させてねじ棒１０７を螺締めすると共に上動させ締め付けることにより電線Ｗを電線挟持部１０８で挟持固定するようにしている。
【０００６】
【発明が解決しようとする課題】
ところで、前記遠隔操作棒１１１はそのもの自体を手で回動させつつ使用するものであるから、何回も回すと手が疲れて作業者には負担が多く、作業能率が上がらないという課題があった。このため、近時、遠隔操作棒自体を回動せずに作業者が手元のハンドルを回動するのみでねじ軸１０７の回動動作が可能となり、作業が楽で能率的に行なえるようにした新タイプのものが出現している。しかしながら、該新タイプの遠隔操作棒は、その先端部と前記係止椀状体１０９との係合構造が異なり、この種従来の端末固定具には使用できないものであった。
そこで、本発明は上記課題に鑑みなされたもので、新タイプの遠隔操作棒に適合するようにして、作業の容易化を進め、作業能率の向上を可能とした電線絶縁保護管の端末固定具を提供することを目的とするものである。
【０００７】
【課題を解決するための手段】
かかる目的を達成するために本発明に係る電線絶縁保護管の端末固定具は、主幹の上下両端にそれぞれ水平腕部を突設させて側面コ形状の本体部材を形成し、上側の水平腕部の一側に電線と平行となる向きに一対の掛止腕片を突設すると共に該各掛止腕片の下面先端寄りに該各掛止腕片に直交するようにして下端面が円弧状凹曲面となり電線保護管に係止する抑止片を設け、下側の水平腕部には回動しつつ自在に上下動するねじ棒を螺着し、前記ねじ棒の上端と前記上側の水平腕部との間を電線が挿通され挟持される電線挟持部とした電線絶縁保護管の端末固定具において、前記下側の水平腕部から下方に突出する前記ねじ棒の下端部外周面に円形状の鍔片を設け、前記鍔片の下面に噛合凸部を設けると共にその下側に該噛合凸部より小径の円柱部を設け、前記円柱部の下側に前記遠隔操作棒先端側の嵌合筒部材内に配置され自在に上下動すると共に回動する作動軸の上端部に係脱自在に係合する係合部を設け、前記ねじ棒の下端部に前記係合部を囲うようにして配置され嵌合筒部材が嵌合するガイド筒部材を取着してなり、前記ガイド筒部材は上下両端面が開口すると共にその内周面に前記噛合凸部と同形状をなしかつ該噛合凸部が嵌合する噛合孔を開設した止板部が設けられ、前記ガイド筒部材の外周面に前記嵌合筒部材の周壁に設けられた係合溝に係脱自在に係合する係止ピンが突設され、前記ねじ棒の下端部をガイド筒部材に挿通した状態で前記止板部と前記係合部との間に圧縮コイルバネを介装し、前記ガイド筒部材を上動させることにより前記鍔片の下面で前記噛合凸部と前記止板部の噛合孔が嵌合して該ガイド筒部材が前記ねじ棒に係合し、前記ガイド筒部材を前記圧縮コイルバネに抗して下動させることにより前記噛合凸部と前記噛合孔との嵌合が外れ該ガイド筒部材と前記ねじ棒との係合が外れて該ガイド筒部材が水平面内で自在に回動し得るように構成した。
【０００８】
【発明の実施の形態】
以下に本発明に係る電線絶縁保護管の端末固定具（以下、単に端末固定具という。）の実施の形態を図面と共に説明する。図１は端末固定具の正面図、図２は同側面図、図３は同側面断面図である。該端末固定具Ａは硬質の合成樹脂材からなり、鉛直な主幹２の上下両端にそれぞれ水平腕部３，４を突出させて側面コ形状の本体部材１を形成している。上下の水平腕部３，４の間では主幹２の内側壁面５が垂直面に形成されると共に、該内側壁面５の所要高さ位置に断面弧状をなし畝状に突出する突条６が水平に設けられている。前記上側の水平腕部３の下面は凹弧状面に形成されると共に、該水平腕部３の先端には下方へ鉛直に伸びる突出片７が延設されている。
【０００９】
また、前記下側の水平腕部４に螺子孔８が開設され、該螺子孔８に前記主幹２、すなわちその内側壁面５と平行に配置されかつ回動しつつ自在に上下動するねじ棒９が螺合され、該ねじ棒９の上端に上面を凹弧状面とした受片１０が固着される。該受片１０はその内側端面１０ａが前記内側壁面５に摺接するように配設されると共に内側端面１０ａの両側縁に主幹２の内側壁面５の両側縁を囲って摺動する案内片１０ｂを突設している。そして、この受片１０とその上方の水平腕部３との間を後記する電線Ｗが挿通され挟持される電線挟持部１１としている。さらに、上側の水平腕部３の一側の両側端に電線挟持部１１に挟持された電線Ｗと平行となる向きに一対の掛止腕片１２が突設され、これら掛止腕片１２の下面先端寄りに各掛止腕片１２に直交するようにして下端面が円弧状凹曲面となる抑止片１３が設けられている。
【００１０】
しかして、本発明にあっては、前記ねじ棒９の下端部外周面に円形状の鍔片１４が設けられ、その下面に六角形状の噛合凸部１５、またその下側に前記噛合凸部１５より小径の円柱部１６、更にその下側に前記噛合凸部１５と同形状をなす六角短柱状の係合部としての係合凸部１７がそれぞれ設けられている。１８は前記ねじ棒９の下端部に、噛合凸部１５を囲うようにして配置され取着されるガイド筒部材である。該ガイド筒部材１８は、上下両端面が開口した円筒状をなし、その内径は前記鍔片１４の外径とほぼ一致している。そして、内周面の上部位置に前記噛合凸部１５とほぼ同形状をなし該噛合凸部１５が嵌合し得る噛合孔１９を開設した止板部２０が設けられている。また、外周面の両側には対向位置して一対の係止ピン２１が突設されている。
【００１１】
そして、図３に示すようにねじ棒９の下端部をガイド筒部材１８に上側から挿通した状態で止板部２０と係合凸部１７との間に圧縮コイルバネ２２が介装され、ガイド筒部材１８を常に上方へ付勢している。ガイド筒部材１８は、上動した位置で水平面内で回動させることにより鍔片１４に止板部２０の上面が当接すると共に噛合孔１９に噛合凸部１５が嵌合してねじ棒９と一体化し、ガイド筒部材１８が自由に回動し得ないようになっている。また、この状態で前記圧縮コイルバネ２２に抗してガイド筒部材１８を下動すると、前記噛合孔１９と噛合凸部１５との嵌合が外れガイド筒部材１８がねじ棒９と関係なく水平面内で自由に回動できるようになっている。前記係合凸部１７は、後記する遠隔操作棒２３先端の嵌合筒部材２８内に配置されると共に自在に上下動しかつ回動する作動軸３６の先端部と係脱自在に係合することとなる。
【００１２】
次に、本発明に使用される遠隔操作棒２３について説明する。該遠隔操作棒２３は公知のもので絶縁材料から形成され、図４、図５に示すように中空状をなしその中に所定のストロークの範囲内で自在に上下動する回動軸２４が内装され、該回動軸２４の先端が遠隔操作棒２３の先端面に穿設された凹窪み２５から突出し得るようになっている。そして、その先端部に六角穴２６を有する接続嵌部２７が一体に設けられている。また、遠隔操作棒２３の基端側には前記回動軸２４を回動させる操作ハンドル（図示せず。）が取着される。
【００１３】
そして、前記遠隔操作棒２３の先端には端末固定具Ａを電線Ｗに固定するための嵌合筒部材２８が着脱自在に取着される。該嵌合筒部材２８は図４、図５に示すように上下両端面が開口する円筒体２９からなり、該円筒体２９の上端両側部に対向位置させて前記各係止ピン２１が係合する一対の係合溝３０が開設されている。該各係合溝３０は側面略Ｌ字状をなしその上端が円筒体２９の上端縁に達した位置で開放されている。また、嵌合筒部材２８の下端部一側に軸孔３１が開設され、遠隔操作棒２３の先端部を円筒体２９内に下から嵌入した状態で前記軸孔３１に螺子３２を螺合することにより嵌合筒部材２８が遠隔操作棒２３に取着されるようになっている。
【００１４】
前記嵌合筒部材２８内には、その内周面に軸受保持部３４が周設されている。そして、該軸受保持部３４に嵌挿される軸受部３５に支持されて自在に上下動し得る作動軸３６が配設されている。該作動軸３６の上端部に前記係合凸部１７が嵌入して係合する平面六角形状の係合凹部３７を穿設した連結部３８が一体に設けられ、一方、下端部には前記接続嵌部２７の六角穴２６に嵌合する保持凸部３９が突設されている。また、前記連結部３８と軸受部３５との間に位置して、作動軸３６に環状の受止板４０と制止板４１が遊嵌され、これら受止板４０と制止板４１との間に圧縮コイルバネ４２が介装されている。これにより、常態では圧縮コイルバネ４２の弾発力により連結部３８が上動位置で停止しており、上から押動することにより圧縮コイルバネ４２に抗して下動することとなる。そして、連結部３８の係合凹部３７がねじ棒９下端部の係合凸部１７に嵌合して係合し得るようになっている。
【００１５】
次に、本発明の端末固定具Ａの取付方法について説明する。まず、端末固定具Ａのねじ棒９を緩めて受片１０の位置を下げ、電線挟持部１１を拡げた状態にしておく。一方、遠隔操作棒２３の先端部を嵌合筒部材２８の下端部に嵌入して軸孔３１に螺子３２を螺合させ、遠隔操作棒２３の先端部に嵌合筒部材２８を取着する。そして、図６（ａ）、図７（ａ）に示すようにガイド筒部材１８に設けた一対の係止ピン２１を嵌合筒部材２８上端部の各係合溝３０の垂直部３０ａに嵌入する。この状態では、連結部３８の係合凹部３７がねじ棒９下端部の係合凸部１７に嵌合し係合している。次に、前記ガイド筒部材１８を下動させ一対の係止ピン２１を前記各垂直部３０ａの奥端部まで押し込む。これにより、連結部３８が下動し圧縮コイルバネ４２が収縮し、図６（ｂ）、図７（ｂ）に示すように係止ピン２１が水平部３０ｂの奥端部に位置する。
【００１６】
更に、ガイド筒部材１８を回動させて各係止ピン２１を各水平部３０ｂの奥端部に位置させる。この際、圧縮コイルバネ４２の弾発付勢により連結部３８が係合凸部１７を押動し、図６（ｃ）、図７（ｃ）に示すように各係止ピン２１が各水平部３０ｂの奥端部から上方に屈曲する曲がり部３０ｃの上端部に達する。この位置に各係止ピン２１が嵌入し端末固定具Ａが自由になると、圧縮コイルバネ４２の弾発力により前記六角形状の噛合孔１９と噛合凸部１５との嵌合が外れ、ガイド筒部材１８がねじ棒９と関係なく回動し、換言すれば、ねじ棒９が作動軸３６と共にガイド筒部材１８に関係なく回動できることとなる。
【００１７】
このようにして、端末固定具Ａが取着された遠隔操作棒２３を高所作業車（図示せず。）より高く差し上げて端末固定具Ａの外側で開放した電線挟持部１１に電線Ｗを挿通させる。この時、端末固定具Ａの掛止腕片１２，１２が電線保護管Ｄ側へ位置するようにする。そして、遠隔操作棒２３を電線絶縁保護管Ｄの方向へ移動させて図４に示すように端末固定具Ａに突設した鉤状の掛止腕片１２，１２及び弧状の抑止片１３を電線保護管Ｄに係止する。次いで、前記図６（ｃ）、図７（ｃ）に示す状態で、作業者が手元でハンドル（図示せず。）を回動することにより作動軸３６が回動し、これに伴い連結部３８、係合凸部１７を介してねじ棒９が回動される。遠隔操作棒２３の嵌合筒部材２８及びガイド筒部材１８は、一体となり回動することはない。これにより、電線Ｗが電線挟持部１１に挟持され端末固定具Ａが固定される。
【００１８】
このねじ棒９の締め付けに際して、該ねじ棒９上端の受片１０の内側端面１０ａが主幹２の内側壁面５に設けた突条６の表面のテーパに摺接しつつ次第に外側に反って上昇する。そして、受片１０が突条６を乗り越えると受片１０は外側に反り返った状態から開放されて元の姿勢に戻り、受片１０の下端縁が突条６に乗って受け止められることとなり、締め付けたねじ棒９の緩みを防止するようになっている。
【００１９】
締付作業が完了すれば、作動軸３６を下動させ係合凸部１７と連結部３８との嵌合を外す。更に、遠隔操作棒２３を少し上動させ噛合孔１９に噛合凸部１５を嵌合しガイド筒部材１８をねじ棒９と一体化させ、無用に回動しないようにする。この状態で、遠隔操作棒２３を前とは逆方向へ回動させ、各係合溝３０から係止ピン２１を抜き、端末固定具Ａから嵌合筒部材２８共々遠隔操作棒２３を外す。このようにして、電線Ｗに取り付けられた端末固定具Ａは、図１、図４に示すように電線Ｗが電線挟持部１１に挟持されるのと同時的に、電線絶縁保護管Ｄの端末の鍔部１ｄに掛止腕片１２，１２の鉤状部が係止され、更にその下端縁が弧状曲面をなす抑止片１３に抑止されて電線絶縁保護管Ｄをしっかりと固定する。
【００２０】
そして、前述のように締め付けられたねじ棒９は、受片１０の内側端面１０ａが本体部材１の内側壁面５に突設した突条６によって受け止められ、緩みが阻止されることにより、上方の水平腕部３と受片１０とで電線Ｗをしっかりと挟持する。しかも、電線挟持部１１の開放した外側上部は上方の水平腕部３の先端から延設した突出片７で囲われ開放幅が狭められていることから、電線Ｄが電線挟持部１１より抜け出るようなことは無い。また、これに伴いねじ棒９の緩みが阻止されることにより掛止腕片１２と抑止片１３とで固定される電線絶縁保護管Ｄも確実に固定保持される。
【００２１】
このように締め付けたねじ棒９を緩める必要が生じたときは、前記と同様に連結部３８と係合凸部１７とを係合させた状態で、ガイド筒部材１８の各係止ピン２１を嵌合筒部材２８の各係合溝３０に嵌入し、係止ピン２１を水平部３０ｂの奥端部に位置させる。この状態で、嵌合筒部材２８を少し下動させ、前記六角形状の噛合孔１９と噛合凸部１５との嵌合を外し、作動軸３６をねじ棒９を緩める方向に回動させて緩める。これにより、電線挟持部１１による電線Ｗの締付けが緩められ、端末固定具Ａを電線Ｗに沿って移動させたり、取り外したりすることができる。
【００２２】
本発明にあっては、電線絶縁保護管Ｄについて適用される場合を説明したが、図８に示すように電気絶縁保護管Ｄに管継手Ｋが連結されている場合についても本発明が適用されることは勿論であり、この場合も前記電線絶縁保護管Ｄと同じ要領で端末固定具Ａを取着することができ、管継手Ｋの端末に形成されているラッパ管部１ｋの外表面を鉤状の掛止腕片１２及び弧状の抑止片１３で抑止させることにより、電線絶縁保護管Ｄが固定される。
【００２３】
【発明の効果】
以上説明したように、本発明に係る電線絶縁保護管の端末固定具は、手元で操作ハンドルを回して操作する新タイプの遠隔操作棒が使用できるようにしたので、これにより電線絶縁保護管の固定作業が容易かつ楽になるばかりか作業能率が格段と向上するという効果がある。
【図面の簡単な説明】
【図１】本発明に係わる電線絶縁保護管の端末固定具の正面図。
【図２】同側面図。
【図３】同側面断面図。
【図４】端末固定具により電線保護管を固定する方法を示す斜視図。
【図５】同側面断面図。
【図６】同作用を示す嵌合筒部材の側面断面図。
【図７】同側面図。
【図８】管継手を連結した電線絶縁保護管を固定する方法を示す斜視図。
【図９】従来の端末固定具の側面図。
【図１０】同端末固定具により電線保護管を固定する方法を示す斜視図。
【符号の説明】
１本体部材
２主幹
３，４水平腕部
９ねじ棒
１１電線挟持部
１２掛止腕片
１３抑止片
１４鍔片
１５噛合凸部
１６円柱部
１７係合部（係合凸部）
１８ガイド筒部材
１９噛合孔
２０止板部
２１係止ピン
２２圧縮コイルバネ
２３遠隔操作棒
２４回動軸
２８嵌合筒部材
３０係合溝
３６作動軸
Ａ端末固定具
Ｄ電線絶縁保護管
Ｗ電線[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to an improvement of a terminal fixing tool for a wire insulation protective tube that fixes a wire insulation protective tube terminal attached to a built-in electric wire by using an aerial work vehicle or the like without directly touching the wire or the like. It is.
[0002]
[Prior art]
Conventionally, if an electric wire installed between utility poles is located near a tree or building, a part of the tree or building caused by wind may be damaged due to contact with the wind, or a crane of a crane truck may be used for installation work. Can easily be damaged by contact, etc., which can cause electric shock accidents. In order to prevent this, a wire insulation protective tube is attached to the electric wire. At that time, if the end of the wire insulation protective tube attached to the wire is not fixed to the wire, the wire insulation protection tube cannot reach the purpose of moving over the wire and covering the necessary part. Lock the hook in the hole provided in the hook and hook the string or rubber band to the hook and bind it to the electric wire or spiral the strip piece directly to the wire insulation protection tube without using the hook Means for fixing the electric wire insulation protective tube so as to be wound and wound around the electric wire has been taken. However, since all of these conventional fixing means are carried out manually at a high place on the overhead wire, there is a risk of causing an electric shock, and the work is troublesome and extremely dangerous.
[0003]
Further, a pipe joint for connecting two electric wire insulation protective tubes attached to an electric wire to each other and fixing the electric wire insulation protective tubes without causing positional displacement is disclosed in, for example, Japanese Patent Application Laid-Open No. 62-71414. As is known, the use of this pipe joint considerably improves the above-mentioned conventional problems, but still requires a lot of troublesome manual work.
[0004]
Therefore, the applicant uses an aerial work vehicle etc. to perform such work, and easily secures the wire insulation protective tube to the wire without touching the wire directly with a remote control rod with high insulation properties. Further, an application for a terminal fixing tool for an electric wire insulation protective tube that can prevent an electric shock accident has been filed as disclosed in JP-A-5-252627. That is, as shown in FIGS. 9 and 10, the terminal fixture a of the electric wire insulation protective tube according to the present invention is a main body having a lateral U shape by projecting the horizontal arm portions 103 and 104 respectively at the upper and lower ends of the main trunk 102. A member 101 is formed, and a latching arm piece 105 and a restraining piece 106 that are hooked on the electric wire insulation protective tube D are provided on one side of the upper horizontal arm part 103, and the lower horizontal arm part 104 is provided on the lower horizontal arm part 104. A screw rod 107 which is arranged in parallel with the main trunk 102 and rotates freely while being rotated is screwed, and an electric wire clamping portion 108 is formed between the upper end of the screw rod 107 and the upper horizontal arm portion 103. It becomes more. The lower end of the screw rod 107 is integrally formed with a cylindrical locking rod 109 opened at the lower surface, and a T-shaped locking opening at the lower end on both sides of the outer peripheral wall of the locking rod 109. The grooves 110 are provided to face each other.
[0005]
On the other hand, as shown in FIG. 10, the remote control rod 111 has a cylindrical shape and has an outer diameter that is detachably fitted into the locking rod 109 and is provided on both sides of the outer circumferential surface of the distal end. Engaging pins 112 that project into the pair of locking grooves 110 are provided. Therefore, the screw rod 107 of the terminal fixture a is loosened and the electric wire holding portion 108 is expanded. Then, the distal end portion of the remote control rod 111 is fitted into the locking rod-shaped body 109, and each engagement pin 112 is engaged with each locking groove 110 of the locking rod-shaped body 109, so that the terminal fixture a Support so as not to pull out. In this state, the remote control rod 111 is raised from the aerial work vehicle and the electric wire W is inserted into the electric wire holding portion 108 of the terminal fixture a. Next, the latching arm piece 105 and the restraining piece 106 of the terminal fixture a are locked to the end edge of the electric wire protection tube D, and the remote control rod 111 itself is rotated by hand to screw the screw rod 107 and The electric wire W is clamped and fixed by the electric wire clamping unit 108 by being moved and tightened.
[0006]
[Problems to be solved by the invention]
By the way, since the remote control rod 111 is used while being rotated by hand, there is a problem that if the hand is turned many times, the hand becomes tired and burdens the operator, and the work efficiency does not increase. It was. Therefore, recently, the operator can rotate the screw shaft 107 only by rotating the handle at hand without rotating the remote control rod itself, so that the work can be performed easily and efficiently. A new type has appeared. However, this new type of remote control rod has a different engagement structure between its tip and the locking rod 109 and cannot be used for this type of conventional terminal fixture.
Therefore, the present invention has been made in view of the above problems, and is adapted to a new type of remote control rod, facilitates work, and improves the work efficiency, and the terminal fixing tool for a wire insulation protective tube that can improve work efficiency. Is intended to provide.
[0007]
[Means for Solving the Problems]
In order to achieve such an object, the terminal fixture of the electric wire insulation protective tube according to the present invention forms a horizontal U-shaped main body member by projecting horizontal arm portions at the upper and lower ends of the main trunk, and the upper horizontal arm portion. A pair of latching arm pieces project in a direction parallel to the electric wire on one side, and the lower end surface is arcuate so as to be orthogonal to each latching arm piece near the lower surface tip of each latching arm piece suppression piece for locking the wire protecting tube becomes concave surface provided on the horizontal arms of the lower and screwed a threaded rod that moves up and down freely while rotating, the horizontal arm of the upper end and the upper side of the threaded rod in the terminal fixture wire insulation protection tube wire is an electric wire clamping portion to be clamped is inserted between the parts, circular in the lower end outer peripheral surface of the threaded rod protruding downward from the horizontal arm portion of the lower And a meshing convex portion is provided on the lower surface of the collar piece, and a lower diameter than the meshing convex portion is provided below the meshing convex portion. The pillar portion is provided, the remote control rod tip end side of the disposed engaging cylinder member upper end to disengageably engage the actuating shaft which rotates together with the moving up and down in the self standing on the lower side of the cylindrical portion the provided engagement portions, the disposed so as to surround the engaging portion to the lower end of the threaded rod fitting tube member is then attached to the guide tube member to be fitted, the guide sleeve member both upper and lower ends of faces the inner stop plate portion on the circumferential surface without the interlock convex portion and the same shape and該噛convex portion is opened meshing hole to be fitted is provided with an opening, said fitting on the outer peripheral surface of said guide tube member A locking pin that detachably engages with an engaging groove provided on the peripheral wall of the combined cylinder member protrudes, and the lower end portion of the screw rod is inserted through the guide cylinder member and the locking plate portion and the engagement pin are inserted. A compression coil spring is interposed between the mating portion and the guide cylinder member is moved upward to cause the meshing convexity on the lower surface of the flange piece. And the engagement hole of the stop plate portion is fitted, the guide cylinder member is engaged with the screw rod, and the guide cylinder member is moved down against the compression coil spring to engage the engagement convex part and the engagement. The fitting with the hole is released, the engagement between the guide cylinder member and the screw rod is released, and the guide cylinder member can be freely rotated in a horizontal plane.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Embodiments of a terminal fixing tool (hereinafter simply referred to as a terminal fixing tool) of an electric wire insulation protective tube according to the present invention will be described below with reference to the drawings. 1 is a front view of a terminal fixture, FIG. 2 is a side view thereof, and FIG. 3 is a side sectional view thereof. The terminal fixture A is made of a hard synthetic resin material, and the horizontal arm portions 3 and 4 are protruded from the upper and lower ends of the vertical main trunk 2 to form the side-shaped body member 1. Between the upper and lower horizontal arm portions 3, 4, the inner wall surface 5 of the main trunk 2 is formed as a vertical surface, and the ridge 6 projecting in a bowl shape and having a cross-sectional arc shape at a required height position of the inner wall surface 5 is horizontal. Is provided. A lower surface of the upper horizontal arm portion 3 is formed in a concave arc-like surface, and a protruding piece 7 extending vertically downward is extended at the tip of the horizontal arm portion 3.
[0009]
Further, a screw hole 8 is formed in the lower horizontal arm portion 4, and a screw rod 9 is arranged in the screw hole 8 in parallel with the main trunk 2, that is, the inner wall surface 5, and freely moves up and down while rotating. Are fastened to the upper end of the threaded rod 9, and a receiving piece 10 whose upper surface is a concave arc surface is fixed. The receiving piece 10 is disposed such that its inner end face 10a is in sliding contact with the inner wall face 5, and guide pieces 10b sliding around both side edges of the inner wall face 5 of the main trunk 2 are provided on both side edges of the inner end face 10a. It is protruding. And it is set as the electric wire clamping part 11 by which the electric wire W mentioned later between this receiving piece 10 and the horizontal arm part 3 above it is penetrated and clamped. Further, a pair of latching arm pieces 12 project from both side ends of one side of the upper horizontal arm part 3 in a direction parallel to the electric wire W held by the electric wire holding part 11. A restraining piece 13 whose lower end surface is an arc-shaped concave curved surface is provided near the lower end of the lower surface so as to be orthogonal to the respective latch arm pieces 12.
[0010]
Accordingly, in the present invention, the circular rod piece 14 is provided on the outer peripheral surface of the lower end portion of the screw rod 9, the hexagonal engagement convex portion 15 on the lower surface, and the engagement convex portion on the lower side thereof. A cylindrical portion 16 having a diameter smaller than 15 and an engaging convex portion 17 as a hexagonal short columnar engaging portion having the same shape as the meshing convex portion 15 are provided below the cylindrical portion 16. Reference numeral 18 denotes a guide cylinder member which is disposed and attached to the lower end portion of the screw rod 9 so as to surround the meshing convex portion 15. The guide tube member 18 has a cylindrical shape with both upper and lower end surfaces opened, and the inner diameter thereof substantially coincides with the outer diameter of the flange piece 14. A stop plate portion 20 is provided at the upper position on the inner peripheral surface. The stop plate portion 20 has a shape substantially the same as that of the meshing convex portion 15 and a meshing hole 19 into which the meshing convex portion 15 can be fitted. Further, a pair of locking pins 21 project from both sides of the outer peripheral surface so as to face each other.
[0011]
Then, as shown in FIG. 3, a compression coil spring 22 is interposed between the stop plate portion 20 and the engaging convex portion 17 in a state where the lower end portion of the screw rod 9 is inserted into the guide tube member 18 from above, and the guide tube The member 18 is always urged upward. The guide cylinder member 18 is rotated in a horizontal plane at a position where the guide cylinder member 18 is moved upward, so that the upper surface of the stop plate portion 20 comes into contact with the flange piece 14 and the engagement projection 15 is fitted into the engagement hole 19 so that the screw rod 9 The guide cylinder member 18 cannot be freely rotated. Further, when the guide cylinder member 18 is moved downward against the compression coil spring 22 in this state, the engagement between the engagement hole 19 and the engagement protrusion 15 is disengaged, and the guide cylinder member 18 is in a horizontal plane irrespective of the screw rod 9. It can be freely rotated with. The engaging convex portion 17 is disposed in a fitting cylinder member 28 at the distal end of a remote operation rod 23 described later, and is detachably engaged with a distal end portion of an operating shaft 36 that freely moves up and down and rotates. It will be.
[0012]
Next, the remote control rod 23 used in the present invention will be described. The remote control rod 23 is a known one and is formed of an insulating material. As shown in FIGS. 4 and 5, the remote control rod 23 has a hollow shape and has a rotating shaft 24 that moves up and down freely within a predetermined stroke range. The distal end of the rotating shaft 24 can project from a recessed recess 25 formed in the distal end surface of the remote control rod 23. And the connection fitting part 27 which has the hexagonal hole 26 in the front-end | tip part is provided integrally. An operation handle (not shown) for rotating the rotation shaft 24 is attached to the proximal end side of the remote control rod 23.
[0013]
A fitting tube member 28 for fixing the terminal fixture A to the electric wire W is detachably attached to the tip of the remote control rod 23. As shown in FIGS. 4 and 5, the fitting cylinder member 28 is formed of a cylindrical body 29 whose both upper and lower end surfaces are open, and the respective locking pins 21 are engaged with each other so as to be opposed to both sides of the upper end of the cylindrical body 29. A pair of engaging grooves 30 are opened. Each engagement groove 30 has a substantially L-shaped side surface and is opened at a position where the upper end reaches the upper end edge of the cylindrical body 29. Further, a shaft hole 31 is formed on one side of the lower end portion of the fitting cylinder member 28, and the screw 32 is screwed into the shaft hole 31 in a state where the distal end portion of the remote control rod 23 is fitted into the cylindrical body 29 from below. Thus, the fitting cylinder member 28 is attached to the remote control rod 23.
[0014]
A bearing holding portion 34 is provided around the inner peripheral surface of the fitting cylinder member 28. An operation shaft 36 that is supported by a bearing portion 35 that is inserted into the bearing holding portion 34 and can freely move up and down is disposed. A connecting portion 38 having a flat hexagonal engaging concave portion 37 into which the engaging convex portion 17 is fitted and engaged is provided at the upper end portion of the operating shaft 36, and the connecting portion 38 is provided at the lower end portion. A holding convex part 39 that fits into the hexagonal hole 26 of the fitting part 27 is projected. In addition, an annular receiving plate 40 and a stop plate 41 are loosely fitted to the operating shaft 36 between the connecting portion 38 and the bearing portion 35, and between the receiving plate 40 and the stop plate 41. A compression coil spring 42 is interposed. Accordingly, in a normal state, the coupling portion 38 is stopped at the upward movement position due to the elastic force of the compression coil spring 42, and is pushed downward from the compression coil spring 42 by being pushed from above. And the engagement recessed part 37 of the connection part 38 can be engaged and engaged with the engagement convex part 17 of the screw rod 9 lower end part.
[0015]
Next, the attachment method of the terminal fixture A of this invention is demonstrated. First, the screw rod 9 of the terminal fixture A is loosened, the position of the receiving piece 10 is lowered, and the electric wire holding part 11 is expanded. On the other hand, the distal end portion of the remote operation rod 23 is fitted into the lower end portion of the fitting tube member 28, the screw 32 is screwed into the shaft hole 31, and the fitting tube member 28 is attached to the tip portion of the remote operation rod 23. . Then, as shown in FIGS. 6A and 7A, the pair of locking pins 21 provided on the guide cylinder member 18 are fitted into the vertical portions 30a of the engagement grooves 30 at the upper end of the engagement cylinder member 28. To do. In this state, the engaging concave portion 37 of the connecting portion 38 is fitted and engaged with the engaging convex portion 17 at the lower end portion of the screw rod 9. Next, the guide cylinder member 18 is moved downward to push the pair of locking pins 21 to the back end portions of the vertical portions 30a. As a result, the connecting portion 38 moves downward and the compression coil spring 42 contracts, and the locking pin 21 is positioned at the far end of the horizontal portion 30b as shown in FIGS. 6 (b) and 7 (b).
[0016]
Further, the guide cylinder member 18 is rotated so that the locking pins 21 are positioned at the back end portions of the horizontal portions 30b. At this time, the elastic force of the compression coil spring 42 causes the connecting portion 38 to push the engaging convex portion 17 so that each locking pin 21 corresponds to each horizontal portion as shown in FIGS. 6 (c) and 7 (c). It reaches the upper end portion of the bent portion 30c bent upward from the rear end portion of 30b. When each locking pin 21 is fitted in this position and the terminal fixture A becomes free, the engagement between the hexagonal engagement hole 19 and the engagement protrusion 15 is released by the elastic force of the compression coil spring 42, and the guide tube member In other words, the screw rod 9 can be rotated together with the operating shaft 36 regardless of the guide cylinder member 18.
[0017]
In this way, the remote control rod 23 to which the terminal fixture A is attached is raised higher than an aerial work vehicle (not shown), and the electric wire W is connected to the electric wire holding portion 11 opened outside the terminal fixture A. Insert. At this time, the latching arm pieces 12 and 12 of the terminal fixture A are positioned on the wire protection tube D side. Then, the remote control rod 23 is moved in the direction of the electric wire insulation protective tube D, and the hook-shaped hooking arm pieces 12 and 12 and the arc-shaped restraining piece 13 projecting from the terminal fixture A as shown in FIG. Lock to the protective tube D. Next, in the state shown in FIGS. 6 (c) and 7 (c), the operator rotates the handle (not shown) at hand, so that the operating shaft 36 is rotated. 38, the screw rod 9 is rotated via the engaging projection 17. The fitting cylinder member 28 and the guide cylinder member 18 of the remote control rod 23 are integrated and do not rotate. Thereby, the electric wire W is clamped by the electric wire clamping part 11, and the terminal fixture A is fixed.
[0018]
When tightening the screw rod 9, the inner end surface 10 a of the receiving piece 10 at the upper end of the screw rod 9 is gradually raised outward while sliding in contact with the taper of the surface of the protrusion 6 provided on the inner wall surface 5 of the main trunk 2. When the receiving piece 10 gets over the ridge 6, the receiving piece 10 is released from the state of being bent outward and returns to the original posture, and the lower end edge of the receiving piece 10 is ridden on the ridge 6 and received. The screw rod 9 is prevented from loosening.
[0019]
When the tightening operation is completed, the operating shaft 36 is moved downward to disengage the engagement convex portion 17 from the coupling portion 38. Further, the remote control rod 23 is slightly moved upward to fit the meshing convex portion 15 into the meshing hole 19 so that the guide tube member 18 is integrated with the screw rod 9 so as not to rotate unnecessarily. In this state, the remote control rod 23 is rotated in the opposite direction to the previous direction, the locking pin 21 is removed from each engagement groove 30, and the remote control rod 23 is removed from the terminal fixture A together with the fitting cylinder member 28. In this way, the terminal fixture A attached to the electric wire W is connected to the end of the electric wire insulation protective tube D at the same time as the electric wire W is held by the electric wire holding portion 11 as shown in FIGS. The hook-shaped portions of the latching arm pieces 12, 12 are locked to the flange portion 1d, and the lower end edge thereof is restrained by the restraining piece 13 having an arcuate curved surface, thereby firmly fixing the wire insulation protective tube D.
[0020]
Then, the screw rod 9 tightened as described above is received by the ridge 6 protruding from the inner wall surface 5 of the main body member 1 at the inner end surface 10a of the receiving piece 10, and is prevented from loosening, so that The electric wire W is firmly held between the horizontal arm 3 and the receiving piece 10. In addition, since the open upper portion of the wire holding portion 11 is surrounded by the protruding piece 7 extending from the tip of the upper horizontal arm portion 3 and the open width is narrowed, the wire D comes out of the wire holding portion 11. There is nothing wrong. Further, along with this, the loosening of the screw rod 9 is prevented, so that the electric wire insulation protective tube D fixed by the latching arm piece 12 and the restraining piece 13 is also securely fixed and held.
[0021]
When it is necessary to loosen the screw rod 9 thus tightened, each locking pin 21 of the guide tube member 18 is engaged with the connecting portion 38 and the engaging convex portion 17 engaged as described above. The engaging pin 30 is fitted into each engaging groove 30 of the fitting cylinder member 28, and the locking pin 21 is positioned at the back end of the horizontal portion 30b. In this state, the fitting cylinder member 28 is slightly moved downward to remove the fitting between the hexagonal engagement hole 19 and the engagement protrusion 15 and loosen the operating shaft 36 by rotating it in the direction of loosening the screw rod 9. . Thereby, the fastening of the electric wire W by the electric wire clamping part 11 is loosened, and the terminal fixing tool A can be moved along the electric wire W, or can be removed.
[0022]
In the present invention, the case where it is applied to the electric wire insulation protective tube D has been described. However, the present invention is also applied to the case where the pipe joint K is connected to the electric insulation protective tube D as shown in FIG. Of course, also in this case, the terminal fixture A can be attached in the same manner as the wire insulation protective tube D, and the outer surface of the trumpet tube portion 1k formed at the end of the pipe joint K The wire insulation protective tube D is fixed by being restrained by the hook-shaped hooking arm piece 12 and the arc-shaped restraining piece 13.
[0023]
【The invention's effect】
As described above, since the terminal fixture of the electric wire insulation protective tube according to the present invention can use a new type of remote control rod operated by turning the operation handle at hand, This not only makes fixing work easier and easier, but also has the effect of significantly improving work efficiency.
[Brief description of the drawings]
FIG. 1 is a front view of a terminal fixture of a wire insulation protective tube according to the present invention.
FIG. 2 is a side view of the same.
FIG. 3 is a side sectional view of the same.
FIG. 4 is a perspective view showing a method of fixing an electric wire protection tube with a terminal fixture.
FIG. 5 is a side sectional view of the same.
FIG. 6 is a side sectional view of a fitting cylinder member showing the same action.
FIG. 7 is a side view of the same.
FIG. 8 is a perspective view showing a method of fixing an electric wire insulation protective pipe connected with pipe joints.
FIG. 9 is a side view of a conventional terminal fixture.
FIG. 10 is a perspective view showing a method of fixing the wire protective tube with the terminal fixing tool.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main body member 2 Main trunks 3, 4 Horizontal arm part 9 Screw rod 11 Electric wire clamping part 12 Hanging arm piece 13 Suppression piece
14 pieces
15 Meshing convex part
16 Cylindrical part 17 Engagement part (engagement convex part)
18 Guide cylinder member
19 Mating hole
20 Stop plate portion 21 Lock pin
22 Compression coil spring 23 Remote control rod 24 Rotating shaft 28 Fitting cylinder member 30 Engaging groove 36 Actuation axis A Terminal fixture D Electric wire insulation protection tube W Electric wire

Claims

Horizontal arm parts project from the upper and lower ends of the main trunk to form side-shaped body members,
A pair of latching arm pieces project from one side of the upper horizontal arm portion in a direction parallel to the electric wire, and are orthogonal to each latching arm piece near the lower end of the bottom surface of each latching arm piece. A lower end surface becomes an arc-shaped concave curved surface, and a restraining piece to be locked to the wire protection tube is provided.
The lower horizontal arm is screwed with a screw rod that moves freely while rotating,
In the terminal fixture wire insulation protection tube wire between has a wire clamping portion to be clamped is inserted between the upper end and the upper horizontal arm of the threaded rod,
Provided a circular flange piece to the lower end outer peripheral surface of the threaded rod protruding downward from the horizontal arm portion of said lower than該噛convex portions on its lower side provided with a lower surface to interlock convex portion of the flange piece a cylindrical portion of smaller diameter is provided, the remote control at the upper end portion of the actuating shaft that rotates together with disposed rod tip side fitting cylinder member moves up and down in its own resident engaged detachably on the lower side of the cylindrical portion An engaging portion is provided to engage,
A guide cylinder member that is disposed so as to surround the engagement portion at the lower end portion of the screw rod and is fitted with a fitting cylinder member is attached.
The guide tube member is provided with a stop plate portion having upper and lower end surfaces that are open and having an inner peripheral surface that has the same shape as the engagement protrusion and has an engagement hole into which the engagement protrusion is fitted. A locking pin is provided on the outer peripheral surface of the member so as to be detachably engaged with an engaging groove provided on the peripheral wall of the fitting cylinder member.
A compression coil spring is interposed between the stop plate portion and the engagement portion in a state where the lower end portion of the screw rod is inserted into the guide tube member,
By moving the guide cylinder member upward, the engagement projections of the engagement protrusions and the stop plate part are fitted on the lower surface of the flange piece so that the guide cylinder member engages with the screw rod, and the guide cylinder member Is moved downward against the compression coil spring to disengage the engagement convex portion from the engagement hole and disengage the guide tube member from the screw rod so that the guide tube member moves in a horizontal plane. terminal fixture of the wire insulation protective tube, characterized in that it has adapted to freely rotate.