JP2004303537A

JP2004303537A - Multi-branch connector

Info

Publication number: JP2004303537A
Application number: JP2003093998A
Authority: JP
Inventors: Kazumichi Mitomi; 和道三富; Kiyoshi Idokawa; 清井戸川
Original assignee: Saneisha Seisakusho KK
Current assignee: Saneisha Seisakusho KK
Priority date: 2003-03-31
Filing date: 2003-03-31
Publication date: 2004-10-28

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multi-branch connector allowing a plurality of branch connection operations to be easily carried out even in a narrow trough in connecting branch lines to a low-voltage main line. <P>SOLUTION: This multi-branch connector A is used for connecting four branch lines C to the low-voltage main line B. The multi-branch connector A comprises a cross-sectionally generally U-shaped frame 1, a cut-through part for connecting the branch lines C to the main line B by being fitted into the frame 1, and a fastening part 3; in connecting the four branch lines C to the main line B, the branch lines C are inserted into respective insulators of the cut-through part; one-side insulator formed by reversing the insulators are fitted into the bottom part in the frame 1; the main line B is fitted into the frame 1 and mounted on the one-side insulator in this state; the other side insulator is fitted into the frame 1 and mounted on the main line B; respective cut-through blades 14 provided for the cut-through parts of the respective insulators are inserted into the main line B and brought into contact with the core wires of the main line B. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
この発明は、電力供給の為地中に埋設されている低圧幹線と、この低圧幹線から分岐して低圧需要家に電力供給を行う分岐線とを接続する多分岐コネクターに関するものである。
【０００２】
【従来の技術】
従来、電力供給の低負荷密度の地域においても、電線類を地中に埋設する作業が行われているが、コスト低減の為、上記低負荷密度地域への地中低圧供給は、従来の高負荷密度地域への供給方式と異なり、変圧器から直接低圧幹線を管路で引き回し、低圧需要家へは個々に分岐コネクターで接続して引き込む方法が採用されている。
【０００３】
この方法において、使用される分岐コネクターとしては、図１１及び図１２に示す防水型の分岐コネクターＧが使用されている。この分岐コネクターＧは、締め付けボルト３８、ねじ板３９等から成る締付け部と、ゴムカバー３１、絶縁丸棒３２、押さえ金具３３、板ばね３４、カットスルー刃３５等から成るカットスルー部４１と、このカットスルー部４１を嵌め入れる断面Ｕ字型の枠体４０から成る。
【０００４】
この分岐コネクターＧによって、低圧幹線Ｂと分岐線Ｃを接続するには、上記枠体４０の底部に低圧幹線Ｂを嵌め入れ、この上から、予め分岐線Ｃを装着したカットスルー部４１を、下面の開口部にカットスルー刃３５を、その刃を下方に向けて低圧幹線Ｂ上に嵌め入れ、その後ねじ板３９を枠体４０の上部に嵌め、締付けボルト３８を締付けて、カットスルー刃３５を上方から押圧して低圧幹線Ｂの電線樹脂被覆を破って芯線にカットスルー刃３５を接触させ、分岐接続している。
【発明が解決しようとする課題】
【０００５】
しかしながら、これらの接続作業が煩雑で狭隘な地中埋設分岐枡や簡易トラフなどでは、容易な作業ではなかった。またこの分岐コネクターＧでは、低圧幹線Ｂの電線樹脂被覆において常時カットスルー刃３５の接点押圧を受けているので、電線樹脂被覆の経年劣化により当該接点押圧に緩みが生じる恐れがあることから細物電線の分岐に限定して使用されていた。さらにこの分岐コネクターＧでは、分岐線Ｃの引き出し数が一つしかなく、同一箇所で複数の分岐接続は出来ず、分岐線Ｃの引き出しの増設は容易には行えなかった。
【０００６】
そこでこの発明は、低圧幹線に分岐線を接続する際、狭隘な簡易トラフなどでも複数の分岐接続作業が容易に出来る多分岐コネクターを提供して上記課題を解決するものである。
【０００７】
【課題を解決するための手段】
請求項１の発明は、低圧幹線と２本の分岐線とを接続する多分岐コネクターにおいて、当該多分岐コネクターは、断面略Ｕ字型の枠体と当該枠体に嵌め込んで低圧幹線と分岐線とを接続するカットスルー部と締付け部から成り、当該カットスルー部は、一対の絶縁体から成り、当該一対の各絶縁体は、夫々内部を中空部とし下面を開口部とした略直方体形状に設け、当該中空部内にカットスルー刃を設け、当該カットスルー刃を上記開口部内から突出自在に設け、当該絶縁体の上面の略中央に、上記中空部に繋がった貫通孔を設け、当該貫通孔に絶縁棒を挿通して設け、当該絶縁体の一側面に上記中空部に繋がった挿入孔を有する略円筒状の分岐線挿入部を設けて成り、上記締付け部は、締付けボルト及び略中央に貫通ねじ孔を穿ったねじ板から成る。
【０００８】
上記低圧幹線と２本の分岐線の接続に際して、上記カットスルー部の上記各絶縁体の分岐線挿入部に、先端に端子部を設けた分岐線を挿入して上記中空部内において各端子部を上記各カットスルー刃の一部に固着し、上記絶縁体を逆さにして開口部を上面に位置させ、上記分岐線と接触した当該カットスルー刃の刃が上記開口部から突出した状態の一方の絶縁体を上記断面略Ｕ字型の枠体内の底部に嵌め入れ、上記カットスルー刃及びその下の上記分岐線の端子部を上記貫通孔に挿通した絶縁棒で支持し、この状態で、上記低圧幹線を上記断面略Ｕ字型の枠体内に嵌め入れて、上記一方の絶縁体のカットスルー刃の上に載置する。
【０００９】
また上記絶縁体の開口部を下面に位置させ、上記分岐線と接触した当該カットスルー刃の刃が上記開口部から突出した状態の他方の絶縁体を上記断面略Ｕ字型の枠体内に嵌め入れて、上記低圧幹線の上に載置し、上記締付けボルトを貫通ねじ孔に螺着した上記ねじ板を上記枠体上部の両側の間に渡して係止し、当該締付けボルトの先端面で上記他方の絶縁体の上面の貫通孔に挿通した絶縁棒の上面を押圧し、さらに締付けボルトを締付けて、上記絶縁棒により上記分岐線の端子部及びカットスルー刃を押圧して当該カットスルー刃を上記低圧幹線に差し込んで低圧幹線の芯線に接触させ、これと同時に当該低圧幹線を押圧して上記一方の絶縁体のカットスルー刃を低圧幹線の芯線に差し込んで接触させた多分岐コネクターとした。
【００１０】
請求項２の発明は、上記絶縁体の分岐線挿入部に挿入する各分岐線の先端部の被覆を一定長剥ぎ取り、当該箇所の芯線に、端子を被せて取り付け、低圧幹線と２本の分岐線の接続に際して、当該端子を取り付けた各分岐線の先端部を上記絶縁体の分岐線挿入部から中空部内まで嵌め入れ、当該箇所において、当該各分岐線の端子の一部と断面略コの字状に設けた上記カットスルー刃の背面部とを固着して、これらを電気的に接続した上記請求項１に記載の多分岐コネクターとした。
【００１１】
請求項３の発明は、低圧幹線と４本の分岐線とを接続する多分岐コネクターにおいて、当該多分岐コネクターは、断面略Ｕ字型の枠体と当該枠体に嵌め込んで低圧幹線と分岐線とを接続するカットスルー部と締付け部から成り、当該カットスルー部は、一対の絶縁体から成り、当該一対の各絶縁体は、夫々内部を中空部とし下面を開口部とした略直方体形状に設け、当該中空部内にカットスルー刃を設け、当該カットスルー刃を上記開口部内から突出自在に設け、当該絶縁体の上面の略中央に、上記中空部に繋がった貫通孔を設け、当該貫通孔に絶縁棒を挿通して設け、当該絶縁体の一方の相対向する両側面に上記中空部に繋がった挿入孔を有する略円筒状の分岐線挿入部を夫々設けて成り、上記締付け部は、締付けボルト及び略中央に貫通ねじ孔を穿ったねじ板から成る。
【００１２】
低圧幹線と４本の分岐線の接続に際して、上記カットスルー部の上記各絶縁体の二つの相対向する位置の分岐線挿入部に、先端に端子部を設けた二つの分岐線を夫々挿入して上記中空部内において互いの端子部を突き合わせて接続し、上記絶縁体を逆さにして開口部を上面に位置させ、当該中空部内の上記分岐線を接続した箇所に上記カットスルー刃を載置して上記各分岐線と接触した上記カットスルー刃が上記開口部から突出した状態の一方の絶縁体を上記断面略Ｕ字型の枠体内の底部に嵌め入れ、上記カットスルー刃及びその下の上記各分岐線の端子部を接続した箇所を上記貫通孔に挿通した絶縁棒で支持し、この状態で、上記低圧幹線を上記断面略Ｕ字型の枠体内に嵌め入れて、上記一方の絶縁体のカットスルー刃の上に載置する。
【００１３】
上記絶縁体の開口部を下面に位置させ、上記中空部内の上記各分岐線の端子部を接続した箇所に上記カットスルー刃を嵌め入れて上記各分岐線と接触した当該カットスルー刃が上記開口部から突出した状態の他方の絶縁体を上記断面略Ｕ字型の枠体内に嵌め入れて、上記低圧幹線の上に載置し、上記締付けボルトを貫通ねじ孔に螺着した上記ねじ板を上記枠体上部の両側の間に渡して係止し、当該締付けボルトの先端面で上記他方の絶縁体の上面の貫通孔に挿通した絶縁棒の上面を押圧し、さらに締付けボルトを締付けて、上記絶縁棒により上記分岐線の端子部及びカットスルー刃を押圧して当該カットスルー刃を上記低圧幹線に差し込んで低圧幹線の芯線に接触させ、これと同時に当該低圧幹線を押圧して上記一方の絶縁体のカットスルー刃を低圧幹線の芯線に差し込んで接触させた多分岐コネクターとした。
【００１４】
請求項４の発明は、上記絶縁体の各分岐線挿入部に挿入する各分岐線の先端部の被覆を一定長剥ぎ取り、当該箇所に、雄ねじ端子又は雌ねじ端子のどちらかを被せて取り付け、低圧幹線と４本の分岐線の接続に際して、当該雄ねじ端子又は雌ねじ端子を取り付けた各分岐線の先端部を上記各絶縁体の分岐線挿入部から相対向して中空部内まで夫々嵌め入れ、当該箇所において、夫々の二つの分岐線の雄ねじ端子と雌ねじ端子を嵌合して、これらを電気的に接続した上記請求項３に記載の多分岐コネクターとした。
【００１５】
請求項５の発明は、低圧幹線と複数の分岐線とを接続する多分岐コネクターにおいて、上記一対の絶縁体の各中空部内の夫々の断面略コの字状に設けたカットスルー刃の背面に、対向したかたちで板ばねを夫々設け、上記断面略Ｕ字型の枠体内において、低圧幹線を各カットスルー刃で差し込んだ際、各絶縁体の絶縁棒で上記各板ばねを押圧し、これらの各板ばねが各カットスルー刃を背面から押圧して、各カットスルー刃の押圧の減退を生じ難くした上記請求項１乃至４の何れかに記載の多分岐コネクターとした。
【００１６】
【発明の実施の形態】
以下、この発明の実施の形態例を図に基づいて説明する。
図１乃至図６は、この発明の実施の形態例を示す。この発明の多分岐コネクターには、４分岐型と２分岐型とあり、ここでは４分岐型の多分岐コネクター（以下「分岐コネクター」という）Ａを使って説明する。この分岐コネクターＡは、図２及び図３に示すように、帯状の板体を断面Ｕ字型に折り曲げて形成した枠体１と、図２に示すように、上記枠体１に嵌め込んで分岐線Ｃと接続するカットスルー部２、及び締付け部３から成る。
【００１７】
上記枠体１は、図３に示すように、両側板の上部の相対向する位置に貫通係止孔４を設けている。上記カットスルー部２は、一対の絶縁体５から成る。この一対の絶縁体５は、図４に示すように、ゴム製の直方体形状に設けた絶縁カバー６から成り、この絶縁カバー６の内部に小さな直方体形状の中空部６ａを設け、その下面を湾曲して凹ませて形成した開口部６ｂを設けている。
【００１８】
この絶縁カバー６の上面の中央に上記中空部６ａに繋がった貫通孔６ｃを設け、この絶縁カバー６の一方の相対向する両側面に、上記中空部６ａに繋がった挿入孔（図示省略）を有する円筒状の分岐線挿入部１０を夫々突設している。また上記中空部６ａ内には、この中空部６ａの形状と同形で、底の無い略箱形のガイド金具１１を設けており、このガイド金具１１の上面の中央には貫通孔１１ａを設け、相対向する一方の両側面には、上記絶縁カバー６の両分岐線挿入部１０を通じて挿入された上記分岐線Ｃを夫々挿入する貫通孔１１ｂを設けている。このガイド金具１１内に、接点ばね板１２、座金１３、断面コの字状のカットスルー刃１４を順に嵌め入れられている。低圧幹線Ｂと分岐線Ｃの接続の際、後述する分岐線Ｃの端子部は、座金１３と断面コの字状のカットスルー刃１４の間に挿入され、この時、カットスルー刃１４は、開口部６ｂから突出するように設けられている。
【００１９】
またこの絶縁カバー６の外側には、直方体形状でこの絶縁体より一回り大きい補強体１５を被せており、この補強体１５の上面の中央には、貫通孔１５ａを設け、下面は開口面とし、相対向する一方の両側面には、上記絶縁カバー６の二つの分岐線挿入部１０を挿通するための開口部１５ｂを設けている。この絶縁カバー６の補強体１５を被せた上面には、中央に貫通孔１６ａを穿ったカバーばね板１６を載置し、この貫通孔１６ａに絶縁丸棒１７を挿通して設けている。この絶縁丸棒１７の下端は、補強体１５の貫通孔１５ａ、絶縁カバー６の貫通孔６ｃ及びガイド金具１１の貫通孔１１ａを通って、接点ばね板１２と当接し、上端は、後述する締付けボルト７の凹部７ｂ内に嵌合した状態となっている。但し後述する枠体１の底部に逆さに入れた絶縁体５の絶縁丸棒１７の一端は、枠体１の底面に当接している。
【００２０】
さらにこの絶縁カバー６の二つの分岐線挿入部１０の外側には、図５に示すように、収縮チューブ１８を夫々被せるようになっている。
また締付け部３は、図４に示すように、突出したねじ部７ａの先端面に凹部７ｂ（図１参照）を設けた締付けボルト７、ばね座金８、中央に貫通ねじ孔９ａを穿ち、一方の相対向する端縁を夫々係止縁９ｂとして設けたねじ板９から成る。
【００２１】
次にこの分岐コネクターＡを使って、分岐枡Ｄ（図７参照）において、１本の低圧幹線Ｂと４本の分岐線Ｃを接続する手順を説明する。
分岐枡Ｄ（図７参照）内において、撚り線となっている低圧幹線Ｂの分岐接続し易い位置にカットスルー部２の接続点を決め、そこに撚り戻し治具（図示省略）を差し込み、この接続相電線を他の相の接続電線から離す。そして、低圧幹線Ｂにおける分岐線Ｃとの接続箇所の電線被覆を清掃する。
【００２２】
２本ずつ２組の分岐線Ｃの先端部の被覆を夫々、一定長剥ぎ取り、これらの箇所に、図５に示すように、雄ねじ端子１９又は雌ねじ端子２０のどちらかを被せて圧縮して取り付ける。これらの雄ねじ端子１９又は雌ねじ端子２０の夫々異なる端子を取り付けた２本の分岐線Ｃを各絶縁カバー６の二つの分岐線挿入部１０及び各ガイド金具１１の貫通孔１１ｂを通して夫々挿入し、夫々の絶縁カバー６の中空部６ａのガイド金具１１内において、接点ばね板１２及び座金１３とカットスルー刃１４との間で、雄ねじ端子１９をばね座金１９ａを介して雌ねじ端子２０に嵌合して螺着する。
【００２３】
そして、２本の分岐線Ｃを取り付けた一方の絶縁体５を逆さにして、上記開口部６ｂを上面に位置し、中空部６ａ内の雄ねじ端子１９と雌ねじ端子２０を接続した箇所の上にカットスルー刃１４を、その刃を上方に向けて設置し、上記各分岐線Ｃの端子部と接触したこのカットスルー刃１４の刃が上記開口部６ｂから突出した状態で、上記断面Ｕ字型の枠体１内の底部に嵌め入れて、枠体１内の底部において、上記各分岐線Ｃの接続した端子部を介して上記カットスルー刃１４を、ガイド金具１１、絶縁カバー６、補強体１５、及びカバーばね板１６の夫々の貫通孔１１ａ、６ｃ、１５ａ、及び１６ａを夫々挿通した絶縁丸棒１７で支持する（図１参照）。この際、絶縁丸棒１７の上端は、接点ばね板１２と当接し、下端は、枠体１の底面に当接する。
【００２４】
この後、上記低圧幹線Ｂを上記断面Ｕ字型の枠体１内に嵌め入れて、先に嵌め入れた上記一方の絶縁体５のカットスルー刃１４上に載置する。そして、他方の絶縁体５を、その開口部６ｂを下面に位置させて中空部６ａ内の雄ねじ端子と雌ねじ端子を接続した箇所にカットスルー刃１４を、その刃を下方に向けて設置し、上記各分岐線Ｃと接触したこのカットスルー刃１４の刃が上記開口部６ｂから突出した状態で、上記断面Ｕ字型の枠体１内に嵌め入れて、上記低圧幹線Ｂ上に載置する。
【００２５】
この後、あらかじめ上記ばね座金８を通した締付けボルト７を螺着したねじ板９を、上記枠体１上部の両側の間に渡し、このねじ板９の係止縁９ｂを枠体１の貫通係止孔４に係止して、このねじ板９を枠体１に固定する。そして、締付けボルト７のねじ部７ａの先端面の凹部７ｂを、上記他方の絶縁体５の上面の貫通孔１１ａ、６ｃ、１５ａ、及び１６ａに挿通した絶縁丸棒１７の頭部の位置と合わせてこの頭部に被せる（図１参照）。そして枠体１乃至は枠体１に係止したねじ板９を適宜のものに固定した状態（図示省略）で、締付けボルト７を締付けて、絶縁丸棒１７の頭部を押圧し、絶縁丸棒１７を下方向に移動させる。
【００２６】
これにより、絶縁丸棒１７が上記他方の絶縁体５のカットスルー刃１４を、接点ばね板１２、座金１３、及び上記分岐線Ｃの各端子部の接続した箇所を介して押圧する。この押圧により、カットスルー刃１４は、低圧幹線Ｂ側に移動してこの低圧幹線Ｂに差し込まれ、低圧幹線Ｂと上記分岐線Ｃとは電気的に接触する。さらに締付けボルト７を、ばね座金８が潰れるまで締付けると、分岐線Ｃ、カットスルー刃１４、低圧幹線Ｂの順で押圧し、この低圧幹線Ｂを上記一方の絶縁体５のカットスルー刃１４に食い込ませて低圧幹線Ｂの芯線にその先端が挿入されて低圧幹線Ｂは、各分岐線Ｃと電気的に接触させる。この後、撚り戻し治具を取り外し、他の相も同様の手順にて分岐接続を行う。
【００２７】
この様にして、図１に示すように、低圧幹線Ｂは、四本の分岐線Ｃと電気的に接続される。分岐枡Ｄ内において、低圧幹線Ｂから４分岐接続した様子を図７及び図８に示す。なお図７において、Ｆは、各分岐線Ｃに設けたヒューズを示す。
【００２８】
また図９及び図１０に示すのは、他の実施の形態例の２分岐型の多分岐コネクターＥ（以下「分岐コネクターＥ」という）を示す。この分岐コネクターＥにおいては、上記実施の形態例の分岐コネクターＡと異なる構成は、４分岐型か２分岐型かの相違であって、他の構成は、分岐コネクターＡと同様である（同じ構成の部位については、同じ番号を使用した）。
【００２９】
具体的に説明すると、分岐コネクターＡでは、カットスルー部２の絶縁カバー６に設ける分岐線挿入部１０として、相対向する一方の両側面に二つ設けているが、この分岐コネクターＥは、一側にしか設けていない、またこの分岐コネクターＥにおいて、接続する分岐線Ｃに被せる端子としては、雌ねじ端子２０を使用し、この雌ねじ端子２０は、予め分岐コネクターＥの絶縁体の内部の中空部内にあるカットスルー刃１４の背面部にねじ１４ａにより螺着している。低圧幹線Ｂと分岐線Ｃの接続における他の手順については、各分岐線Ｃにおける雄ねじ端子１９と雌ねじ端子２０の螺着箇所を除き、上記分岐コネクターＡにおける場合と同様である。
【００３０】
この様な結果、これらの実施の形態例の分岐コネクターＡ、Ｅを使用した場合、以下の効果を奏するものである。
一つの分岐コネクターＡから同時に最大４分岐の引き出しが容易にでき、一対のカットスルー刃１４で低圧幹線Ｂの芯線に対向して差し込み、各カットスルー刃１４を背面から絶縁丸棒１７で接点ばね板１２を介して押圧しているので、一対の絶縁体５のカットスルー刃１４の押し圧力の減退が生じ難い。低圧幹線Ｂから同時に複数の分岐線Ｃを引出すとき、低圧幹線Ｂの切断、皮むき作業が不要であり、そのため複数の分岐線Ｃの接続作業を活線状態で同時に行える。
【００３１】
また複数の分岐線Ｃの接続時の空間占有幅が狭くて済むので、現行の分岐枡Ｄ及び簡易トラフなどの狭隘な作業空間で、複数の分岐線Ｃの接続作業を同時に行え、さらに電力の複数分岐と通信線分岐の同一箱内収納が可能となる。また分岐線Ｃの分岐数、サイズ及び引き出し方向を現場で設定することができ、各相の分岐位置が分岐枡Ｄ又は簡易トラフ内に分散できるので一箇所に輻輳せず、ヒューズを相別、行き先順序別にまとめることができる。
【００３２】
さらにカットスルー部２に予め工場で分岐線Ｃ又はヒューズＦ（図７参照）を接続しておけば分岐コネクターＡ、Ｅ本体の防水処理の信頼性が上がる。分岐線Ｃの芯線から水の浸入があっても、絶縁カバー６及びこの絶縁カバー６の中空部６ａ内の端子接続部の外側で遮断されるので、カットスルー刃１４と低圧幹線Ｂとの接点及び低圧幹線Ｂの芯線まで浸入することがない。
【００３３】
カットスルー刃１４の部分に不乾性シール剤を入れることとカットスルー刃１４を押圧する接点ばね板１２とは別に絶縁カバー６に常時圧力を加えるカバーばね板１６を設けることにより、低圧幹線Ｂの被覆との接合部の長期防水信頼性が上がる。低圧幹線Ｂ電線のサイズ別の芯線外径及び被覆外径寸法でカットスルー刃１４の締め込み寸法を設定しており、締付けボルト７を完全に締め込むことにより、確実な通電性能と防水性能を確保できるので、締付けボルト７のトルク管理が不要となる。
【００３４】
上記実施の形態例において、絶縁体５において、絶縁カバー６、ガイド金具１１、接点ばね板１２、座金１３、補強体１５、カバーばね板１６、収縮チューブ１８などを設けているが、これらの部材は、この発明の必須要件ではない。また低圧幹線Ｂから分岐線Ｃを４分岐接続又は２分岐接続する際に、全ての分岐箇所に分岐線Ｃを設けているが、分岐接続に当っては、必ずしも全ての分岐線Ｃを使用する必要はなく、必要な箇所のみの使用で良い。この時使用しない分岐線Ｃには、防護カバーを被せ、防水処理を施しておくとよい。
【００３５】
さらに分岐コネクターＥにおいて、分岐線の端子部とカットスルー刃１４とを固着するのに、ねじ１４ａを使用しているが、分岐線の端子部とカットスルー刃１４とを固着する方法は、これに限定するものではない。また絶縁体５の中空部６ａ内において、接続した分岐線Ｃの雄ねじ端子１９と雌ねじ端子２０及びカットスルー刃１４を押圧又は支持している絶縁棒として、絶縁丸棒１７を使用しているが絶縁棒の形状は、丸棒に限定するものではない。
【００３６】
【発明の効果】
請求項１乃至５の各発明によれば、一つの分岐コネクターから同時に最大４分岐の引き出しが容易にできる。また複数の分岐線の接続時の空間占有幅が狭くて済むので、現行の分岐枡及び簡易トラフなどの狭隘な作業空間で、複数の分岐線の接続作業を同時に行え、さらに電力の複数分岐と通信線分岐の同一箱内収納が可能となる。また分岐線の分岐数、サイズ及び引き出し方向を現場で設定することができ、各相の分岐位置が分岐枡又は簡易トラフ内に分散できるので一箇所に輻輳せず、ヒューズを相別、行き先順序別にまとめることができる。
【００３７】
さら請求項２の発明によれば、絶縁体の各分岐線挿入部に挿入する各分岐線の先端部に端子を設け、この端子を各絶縁体の中空部内で、カットスルー刃の背面部とを固着して電気的に接続しているので、また請求項４の発明によれば、各分岐線の先端部に雄ねじ端子又は雌ねじ端子のどちらかを設け、これらを各絶縁体の中空部内で、螺着して電気的に接続しているので、これらの接続が確実かつ簡単にでき、電気的な接続の信頼も極めて高いものである。
【００３８】
また請求項５の発明によれば、上記断面略Ｕ字型の枠体内において、低圧幹線を各カットスルー刃で差し込んだ際、一対のカットスルー刃で低圧幹線の芯線に対向して差し込み、これらの一対のカットスルー刃を背面で対向したかたちに設けた夫々の絶縁丸棒で板ばねを介して押圧しているので、これらのカットスルー刃の押し圧力の減退が生じ難い。よって、長期の使用における劣化の心配が無く、細物電線に限らず他の電線においても安心して使用できる。
【図面の簡単な説明】
【図１】この発明の実施の形態例の４分岐型の分岐コネクターで４分岐接続した状態を示す一部断面正面図である。
【図２】この発明の実施の形態例の４分岐型の分岐コネクターで４分岐接続した状態を示す一部断面側面図である。
【図３】この発明の実施の形態例の分岐コネクターの断面Ｕ字型の枠体の斜視図である。
【図４】この発明の実施の形態例の分岐コネクターのカットスルー部及び締付け部を夫々分解した状態の斜視図である。
【図５】この発明の実施の形態例の分岐コネクターにおいて、２本の分岐線に夫々雄ねじ端子又は雌ねじ端子を取付けて、これらを絶縁体内で螺着して接続する様子を示す分解斜視図である。
【図６】この発明の実施の形態例の分岐コネクターの底部に、２本の分岐線を固着した絶縁体を嵌め入れた状態の斜視図である。
【図７】この発明の実施の形態例の分岐コネクターを使用して分岐枡内において、低圧幹線を４箇所で４分岐接続した状態の正面図である。
【図８】上記図７におけるＸ−Ｘ線の端面図である。
【図９】この発明の他の実施の形態例の２分岐型の分岐コネクターで２分岐接続した状態を示す一部断面正面図である。
【図１０】この発明の他の実施の形態例の２分岐型の分岐コネクターで２分岐接続した状態を示す一部断面側面図である。
【図１１】従来の分岐型の分岐コネクターで分岐接続した状態を示す一部断面正面図である。
【図１２】従来の分岐型の分岐コネクターで分岐接続した状態を示す一部断面側面図である。
【符号の説明】
Ａ（４分岐型の）分岐コネクターＢ低圧幹線
Ｃ分岐線Ｅ（２分岐型の）分岐コネクター
１断面Ｕ字型の枠体２カットスルー部
３締付け部５絶縁体
７締付けボルト９ねじ板
１０中空部１１分岐線挿入部
１２接点ばね板１４カットスルー刃
１７絶縁丸棒１９雄ねじ端子
２０雌ねじ端子[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-branch connector for connecting a low-voltage main line buried underground for supplying power and a branch line branched from the low-voltage main line and supplying power to low-voltage consumers.
[0002]
[Prior art]
In the past, the work of burying electric wires underground has been carried out even in areas with low load density of power supply.However, in order to reduce costs, underground low pressure supply to the above low load density area has been Unlike the supply method to load density areas, a method is adopted in which low-voltage mains are routed directly from transformers via pipelines, and individually connected to low-voltage consumers with branch connectors.
[0003]
In this method, a waterproof branch connector G shown in FIGS. 11 and 12 is used as a branch connector to be used. The branch connector G includes a tightening portion including a tightening bolt 38, a screw plate 39, and the like, and a cut-through portion 41 including a rubber cover 31, an insulating round bar 32, a holding bracket 33, a plate spring 34, a cut-through blade 35, and the like. It is composed of a frame body 40 having a U-shaped cross section in which the cut-through portion 41 is fitted.
[0004]
In order to connect the low-voltage main line B and the branch line C with the branch connector G, the low-voltage main line B is fitted into the bottom of the frame 40, and the cut-through portion 41 to which the branch line C is previously attached is inserted from above. A cut-through blade 35 is fitted into the opening on the lower surface of the low-pressure main line B with the blade facing downward, and a screw plate 39 is fitted over the upper portion of the frame body 40, and a tightening bolt 38 is tightened. Is pressed from above to break the wire resin coating of the low-voltage trunk B, and the cut-through blade 35 is brought into contact with the core wire for branch connection.
[Problems to be solved by the invention]
[0005]
However, the connection work is complicated, and it is not easy work in a narrow underground branch basin or a simple trough. Further, in this branch connector G, since the contact pressure of the cut-through blade 35 is constantly received in the wire resin coating of the low-voltage trunk line B, the contact pressing may be loosened due to aging of the wire resin coating, so that the thin connector is thin. It was used only for branching wires. Further, in this branch connector G, only one branch line C was pulled out, and a plurality of branch connections could not be made at the same location, and extension of the branch line C could not be easily performed.
[0006]
Accordingly, the present invention solves the above-described problems by providing a multi-branch connector that can easily perform a plurality of branch connection operations even with a narrow simple trough when connecting a branch line to a low-voltage main line.
[0007]
[Means for Solving the Problems]
The invention according to claim 1 is a multi-branch connector for connecting a low-voltage main line and two branch lines, wherein the multi-branch connector is fitted into the frame having a substantially U-shaped cross section and is connected to the low-voltage main line to form a branch. It consists of a cut-through part that connects the wire and a tightening part, and the cut-through part consists of a pair of insulators. Each of the pair of insulators has a substantially rectangular parallelepiped shape in which the inside is hollow and the lower surface is open. Provided, a cut-through blade is provided in the hollow portion, the cut-through blade is provided to be able to protrude from the opening, and a through hole connected to the hollow portion is provided substantially at the center of the upper surface of the insulator. An insulating rod is inserted through the hole, and a substantially cylindrical branch line insertion portion having an insertion hole connected to the hollow portion is provided on one side surface of the insulator. The tightening portion includes a tightening bolt and a substantially central portion. Screw plate with perforated screw holes in Et al made.
[0008]
When connecting the low-voltage main line and the two branch lines, a branch line having a terminal portion provided at the tip is inserted into the branch line insertion portion of each of the insulators of the cut-through portion, and each terminal portion is inserted in the hollow portion. It is fixed to a part of each of the cut-through blades, the insulator is turned upside down and the opening is positioned on the upper surface, and one of the cut-through blades in contact with the branch line projects from the opening. The insulator is fitted into the bottom of the frame having the substantially U-shaped cross section, and the cut-through blade and the terminal portion of the branch line thereunder are supported by an insulating rod inserted through the through-hole. A low-voltage main line is fitted into the frame having a substantially U-shaped cross section, and placed on the cut-through blade of the one insulator.
[0009]
In addition, the opening of the insulator is positioned on the lower surface, and the other insulator in a state where the blade of the cut-through blade in contact with the branch line protrudes from the opening is fitted into the frame having a substantially U-shaped cross section. Put, placed on the low-voltage main line, the screw plate with the tightening bolt screwed into the through screw hole is passed across both sides of the upper part of the frame body and locked, and the tip surface of the tightening bolt is The upper surface of the insulating rod inserted into the through hole on the upper surface of the other insulator is pressed, the tightening bolt is further tightened, and the terminal portion of the branch line and the cut-through blade are pressed by the insulating rod to cut the blade. Was inserted into the low-voltage main line and brought into contact with the core of the low-voltage main line, and at the same time, the low-voltage main line was pressed and the cut-off blade of the one insulator was inserted into the core of the low-voltage main line and brought into contact with the multi-branch connector. .
[0010]
The invention according to claim 2 is that the end of each branch line to be inserted into the branch line insertion portion of the insulator is stripped of a predetermined length, the core wire at the location is covered with a terminal and attached, and a low-voltage main line and two low-voltage trunk lines are attached. At the time of connection of the branch line, the distal end of each branch line to which the terminal is attached is fitted from the branch line insertion portion of the insulator to the inside of the hollow portion. The multi-branch connector according to claim 1, wherein the multi-branch connector according to claim 1, wherein the back part of the cut-through blade provided in a U-shape is fixed and electrically connected.
[0011]
According to a third aspect of the present invention, in the multi-branch connector for connecting the low-voltage main line and the four branch lines, the multi-branch connector includes a frame having a substantially U-shaped cross section and a low-voltage main line that is fitted into the frame. It consists of a cut-through part that connects the wire and a tightening part, and the cut-through part consists of a pair of insulators. Each of the pair of insulators has a substantially rectangular parallelepiped shape in which the inside is hollow and the lower surface is open. Provided, a cut-through blade is provided in the hollow portion, the cut-through blade is provided to be able to protrude from the opening, and a through hole connected to the hollow portion is provided substantially at the center of the upper surface of the insulator. An insulating rod is inserted through the hole, and a substantially cylindrical branch line insertion portion having an insertion hole connected to the hollow portion is provided on one of two opposite side surfaces of the insulator, and the fastening portion is , Penetrating into the tightening bolt and almost in the center Flip consisting screw plate bored holes.
[0012]
When connecting the low-voltage main line and the four branch lines, insert two branch lines each having a terminal portion at the tip into each of the branch line insertion portions of the insulator at two opposite positions of the cut-through portion. In the hollow part, the terminals are connected to each other, and the insulator is turned upside down so that the opening is located on the upper surface, and the cut-through blade is placed at a location where the branch line is connected in the hollow part. Then, one of the insulators in a state where the cut-through blade in contact with each of the branch lines protrudes from the opening is fitted into the bottom of the frame having a substantially U-shaped cross section, and the cut-through blade and the lower portion thereunder are inserted. The portion where the terminal portion of each branch line is connected is supported by an insulating rod inserted into the through hole. In this state, the low-voltage main line is fitted into the frame having a substantially U-shaped cross section, and the one insulator Place on the cut-through blade.
[0013]
The opening of the insulator is positioned on the lower surface, and the cut-through blade is fitted into the hollow portion at a position where the terminal of each branch line is connected, and the cut-through blade in contact with each branch line is opened by the opening. The other insulator in a state protruding from the portion is fitted into the frame having a substantially U-shaped cross section, placed on the low-voltage main line, and the screw plate in which the tightening bolt is screwed into a through screw hole. The upper surface of the insulating rod inserted through the through hole in the upper surface of the other insulator is pressed by the tip surface of the tightening bolt, and further tightened by tightening the tightening bolt. The insulating rod presses the terminal portion and the cut-through blade of the branch line, inserts the cut-through blade into the low-voltage main line and contacts the core of the low-voltage main line, and simultaneously presses the low-voltage main line to press the one of the low-voltage main lines. Insulation cut-through It was used as a multi-branch connector in contact plugged into the core wire of the low-pressure mains.
[0014]
The invention according to claim 4 is characterized in that a predetermined length of the coating of the distal end of each branch line to be inserted into each branch line insertion portion of the insulator is stripped off, and the corresponding portion is covered with either a male screw terminal or a female screw terminal and attached. When connecting the low-voltage main line and the four branch lines, the distal end of each branch line to which the male screw terminal or the female screw terminal is attached is inserted into the hollow portion facing each other from the branch line insertion portions of the insulators. The multi-branch connector according to claim 3, wherein the male screw terminal and the female screw terminal of each of the two branch wires were fitted to each other and electrically connected to each other.
[0015]
According to a fifth aspect of the present invention, in the multi-branch connector for connecting the low-voltage main line and the plurality of branch lines, a back surface of the cut-through blade provided in each hollow portion of the pair of insulators in a substantially U-shaped cross section. The leaf springs are respectively provided in opposing shapes, and when the low-voltage main line is inserted with each cut-through blade in the frame having a substantially U-shaped cross section, each of the leaf springs is pressed with an insulating rod of each insulator. The multi-branched connector according to any one of claims 1 to 4, wherein each leaf spring presses each cut-through blade from the back surface, so that the pressure of each cut-through blade is hardly reduced.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 6 show an embodiment of the present invention. The multi-branch connector of the present invention includes a four-branch type and a two-branch type. Here, a four-branch type multi-branch connector (hereinafter, referred to as a “branch connector”) A will be described. As shown in FIGS. 2 and 3, the branch connector A is formed by bending a band-shaped plate into a U-shaped cross section, and is fitted into the frame 1 as shown in FIG. It comprises a cut-through portion 2 connected to the branch line C, and a fastening portion 3.
[0017]
As shown in FIG. 3, the frame 1 is provided with through-locking holes 4 at opposing positions on the upper portions of both side plates. The cut-through portion 2 includes a pair of insulators 5. As shown in FIG. 4, the pair of insulators 5 includes an insulating cover 6 provided in a rubber rectangular parallelepiped shape. A small rectangular parallelepiped hollow portion 6 a is provided inside the insulating cover 6, and the lower surface thereof is curved. An opening 6b is formed by being recessed.
[0018]
A through-hole 6c connected to the hollow portion 6a is provided at the center of the upper surface of the insulating cover 6, and an insertion hole (not shown) connected to the hollow portion 6a is formed on one of two opposite side surfaces of the insulating cover 6. Each of the cylindrical branch line insertion portions 10 is protruded. In the hollow part 6a, a substantially box-shaped guide fitting 11 having the same shape as the hollow part 6a and having no bottom is provided, and a through hole 11a is provided in the center of the upper surface of the guide fitting 11, On opposite one side surfaces, through holes 11b for inserting the branch lines C inserted through the two branch line insertion portions 10 of the insulating cover 6, respectively, are provided. A contact spring plate 12, a washer 13, and a cut-through blade 14 having a U-shaped cross section are sequentially fitted into the guide fitting 11. When connecting the low-voltage main line B and the branch line C, a terminal portion of the branch line C described later is inserted between the washer 13 and the cut-through blade 14 having a U-shaped cross section. At this time, the cut-through blade 14 It is provided so as to protrude from the opening 6b.
[0019]
Further, a reinforcing member 15 having a rectangular parallelepiped shape and slightly larger than the insulating member is covered on the outside of the insulating cover 6, and a through hole 15a is provided in the center of the upper surface of the reinforcing member 15, and the lower surface is an opening surface. An opening 15b for inserting the two branch line insertion portions 10 of the insulating cover 6 is provided on one of the two opposite side surfaces. A cover spring plate 16 having a through hole 16a in the center is placed on the upper surface of the insulating cover 6 covered with the reinforcing member 15, and an insulating round bar 17 is inserted through the through hole 16a. The lower end of the insulating round bar 17 passes through the through-hole 15a of the reinforcing member 15, the through-hole 6c of the insulating cover 6, and the through-hole 11a of the guide fitting 11, and abuts on the contact spring plate 12. The bolt 7 is fitted into the recess 7b. However, one end of the insulating round bar 17 of the insulator 5 which is placed upside down on the bottom of the frame 1 described below is in contact with the bottom surface of the frame 1.
[0020]
Further, as shown in FIG. 5, shrink tubes 18 are respectively placed on the outside of the two branch line insertion portions 10 of the insulating cover 6.
Further, as shown in FIG. 4, the tightening portion 3 has a tightening bolt 7 having a concave portion 7b (see FIG. 1) provided on the distal end surface of a protruding screw portion 7a, a spring washer 8, and a through screw hole 9a at the center. Are provided as screwing edges 9 each of which is provided as an engaging edge 9b.
[0021]
Next, a procedure for connecting one low-voltage main line B and four branch lines C in the branch box D (see FIG. 7) using the branch connector A will be described.
In the branch basin D (see FIG. 7), a connection point of the cut-through portion 2 is determined at a position where branch connection of the low-voltage trunk line B, which is a stranded wire, is easy, and a untwisting jig (not shown) is inserted therein. This connecting phase electric wire is separated from the connecting electric wires of the other phases. Then, the wire covering of the connection point with the branch line C in the low-voltage main line B is cleaned.
[0022]
The coatings at the end portions of the two sets of branch wires C are stripped off by a predetermined length, and either of the male screw terminal 19 or the female screw terminal 20 is put on these portions as shown in FIG. Attach. Two branch wires C to which different terminals of the male screw terminal 19 or the female screw terminal 20 are attached are inserted through the two branch wire insertion portions 10 of the insulating cover 6 and the through holes 11b of the guide fittings 11, respectively. The male screw terminal 19 is fitted to the female screw terminal 20 via the spring washer 19a between the contact spring plate 12 and the washer 13 and the cut-through blade 14 in the guide fitting 11 in the hollow portion 6a of the insulating cover 6 of FIG. Screw it.
[0023]
Then, one of the insulators 5 to which the two branch lines C are attached is turned upside down, and the opening 6b is positioned on the upper surface, and the opening 6b is positioned above the portion where the male screw terminal 19 and the female screw terminal 20 are connected in the hollow portion 6a. The cut-through blade 14 is installed with its blade facing upward, and the cut-through blade 14 in contact with the terminal portion of each branch line C protrudes from the opening 6b. Of the cut-through blade 14 at the bottom of the frame 1 through the terminal connected to each of the branch lines C, the guide fitting 11, the insulating cover 6, and the reinforcing member. The through-holes 11a, 6c, 15a, and 16a of the cover spring plate 16 and the cover spring plate 16 are supported by insulating round bars 17 inserted therein (see FIG. 1). At this time, the upper end of the insulating round bar 17 contacts the contact spring plate 12, and the lower end contacts the bottom surface of the frame 1.
[0024]
Thereafter, the low-voltage main line B is fitted into the frame 1 having a U-shaped cross section, and is placed on the cut-through blade 14 of the one insulator 5 previously fitted. Then, the other insulator 5 is provided with the cut-through blade 14 at a position where the opening 6b is positioned on the lower surface and the male screw terminal and the female screw terminal are connected in the hollow portion 6a, with the blade facing downward, With the blade of the cut-through blade 14 in contact with each of the branch lines C protruding from the opening 6b, the cut-through blade 14 is fitted into the U-shaped frame 1 and placed on the low-voltage trunk line B. .
[0025]
Thereafter, a screw plate 9 screwed with a tightening bolt 7 previously passed through the spring washer 8 is passed between both sides of the upper portion of the frame 1, and the locking edge 9 b of the screw plate 9 is passed through the frame 1. The screw plate 9 is fixed to the frame 1 by being locked in the locking hole 4. Then, the concave portion 7b on the tip surface of the screw portion 7a of the tightening bolt 7 is aligned with the position of the head of the insulating round bar 17 inserted through the through holes 11a, 6c, 15a, and 16a on the upper surface of the other insulator 5. Put it on the head of the lever (see Fig. 1). Then, with the frame 1 or the screw plate 9 fixed to the frame 1 fixed to an appropriate member (not shown), the tightening bolt 7 is tightened, and the head of the insulating round bar 17 is pressed, so that the insulating round bar 17 is pressed. The rod 17 is moved downward.
[0026]
As a result, the insulating round bar 17 presses the cut-through blade 14 of the other insulator 5 via the contact points of the contact spring plate 12, the washer 13, and the respective terminals of the branch line C. Due to this pressing, the cut-through blade 14 moves toward the low-voltage main line B and is inserted into the low-voltage main line B, and the low-voltage main line B and the branch line C are electrically contacted. When the tightening bolt 7 is further tightened until the spring washer 8 is crushed, the branch line C, the cut-through blade 14 and the low-voltage main line B are pressed in this order, and the low-voltage main line B is pressed against the cut-through blade 14 of the one insulator 5. The tip of the low-voltage main line B is inserted into the core of the low-voltage main line B, and the low-voltage main line B is brought into electrical contact with each branch line C. Thereafter, the untwisting jig is removed, and the other phases are branched and connected in the same procedure.
[0027]
In this manner, as shown in FIG. 1, the low-voltage main line B is electrically connected to the four branch lines C. FIGS. 7 and 8 show a state where four branches are connected from the low-voltage main line B in the branch basin D. In FIG. 7, F indicates a fuse provided on each branch line C.
[0028]
9 and 10 show a two-branch multi-branch connector E (hereinafter, referred to as a "branch connector E") according to another embodiment. In this branch connector E, the configuration different from the branch connector A of the above embodiment is the difference between the four-branch type and the two-branch type, and the other configuration is the same as the branch connector A (the same configuration). The same number was used for the site of).
[0029]
More specifically, in the branch connector A, two branch line insertion portions 10 provided on the insulating cover 6 of the cut-through portion 2 are provided on one of two opposite side surfaces. A female screw terminal 20 is used as a terminal to be placed on the branch line C to be connected in the branch connector E, and the female screw terminal 20 is provided in advance in a hollow portion inside the insulator of the branch connector E. Is screwed to the back of the cut-through blade 14 with a screw 14a. Other procedures in connection between the low-voltage main line B and the branch line C are the same as those in the case of the branch connector A, except for the locations where the male screw terminals 19 and the female screw terminals 20 are screwed in the respective branch lines C.
[0030]
As a result, when the branch connectors A and E of these embodiments are used, the following effects can be obtained.
A maximum of four branches can be easily pulled out from one branch connector A at the same time. A pair of cut-through blades 14 are inserted in opposition to the core wire of the low-voltage main line B, and each cut-through blade 14 is contacted with an insulating round bar 17 from the back. Since the pressing is performed via the plate 12, the pressing force of the cut-through blades 14 of the pair of insulators 5 hardly decreases. When a plurality of branch lines C are drawn from the low-voltage main line B at the same time, cutting and peeling work of the low-voltage main line B is unnecessary, so that the connection work of the plurality of branch lines C can be performed simultaneously in a live state.
[0031]
Further, since the space occupied by the connection of the plurality of branch lines C can be narrowed, the connection work of the plurality of branch lines C can be simultaneously performed in a narrow work space such as the current branching basin D and a simple trough, and the power consumption is further reduced. Multiple branches and communication line branches can be stored in the same box. In addition, the number of branches, the size, and the drawing direction of the branch line C can be set on site, and the branch positions of each phase can be dispersed in the branch basin D or the simple trough. They can be organized by destination order.
[0032]
If the branch line C or the fuse F (see FIG. 7) is connected to the cut-through portion 2 in advance at the factory, the reliability of the waterproof treatment of the branch connectors A and E is improved. Even if water intrudes from the core wire of the branch line C, it is cut off outside the insulating cover 6 and the terminal connection portion in the hollow portion 6a of the insulating cover 6, so that the contact between the cut-through blade 14 and the low-voltage trunk line B Also, there is no intrusion into the core wire of the low-voltage main line B.
[0033]
By providing a non-drying sealant at the cut-through blade 14 and providing a cover spring plate 16 for constantly applying pressure to the insulating cover 6 separately from the contact spring plate 12 for pressing the cut-through blade 14, The long-term waterproofing reliability of the joint with the coating increases. The tightening dimensions of the cut-through blade 14 are set based on the core wire outer diameter and sheath outer diameter for each size of the low-voltage main B wire, and by completely tightening the tightening bolts 7, reliable energizing performance and waterproof performance are achieved. Since it can be ensured, the torque management of the tightening bolt 7 becomes unnecessary.
[0034]
In the above embodiment, the insulator 5 includes the insulating cover 6, the guide fitting 11, the contact spring plate 12, the washer 13, the reinforcing member 15, the cover spring plate 16, the contraction tube 18, and the like. Is not a requirement of the present invention. Further, when the branch line C is connected to the branch line C from the low-voltage main line B in four-branch connection or two-branch connection, the branch lines C are provided in all branch locations. However, in the branch connection, all the branch lines C are necessarily used. There is no need to use only the necessary parts. At this time, the unused branch line C may be covered with a protective cover and subjected to a waterproof treatment.
[0035]
Further, in the branch connector E, the screw 14a is used to fix the terminal portion of the branch line to the cut-through blade 14, but the method of fixing the terminal portion of the branch line to the cut-through blade 14 is as follows. It is not limited to. Also, in the hollow portion 6a of the insulator 5, an insulating round bar 17 is used as an insulating bar for pressing or supporting the male screw terminal 19, the female screw terminal 20, and the cut-through blade 14 of the connected branch line C. The shape of the insulating bar is not limited to a round bar.
[0036]
【The invention's effect】
According to the first to fifth aspects of the present invention, it is possible to easily pull out up to four branches from one branch connector at the same time. In addition, since the space occupation width when connecting a plurality of branch lines can be narrow, the connection work of a plurality of branch lines can be simultaneously performed in a narrow work space such as a current branch basin and a simple trough, and furthermore, a plurality of branches of power can be connected. The communication line branch can be stored in the same box. In addition, the number of branches, the size and the drawing direction of the branch line can be set on site, and the branch position of each phase can be dispersed in a branch basin or a simple trough. Can be summarized separately.
[0037]
Further, according to the invention of claim 2, a terminal is provided at a tip end of each branch line to be inserted into each branch line insertion portion of the insulator, and this terminal is provided inside the hollow portion of each insulator with the back portion of the cut-through blade. According to the invention of claim 4, either the male screw terminal or the female screw terminal is provided at the tip of each branch line, and these are provided in the hollow portions of the insulators. Since they are screwed and electrically connected, these connections can be made reliably and easily, and the reliability of the electrical connection is extremely high.
[0038]
According to the invention of claim 5, when the low-voltage main line is inserted with each cut-through blade in the frame having a substantially U-shaped cross section, the pair of cut-through blades is inserted in opposition to the core line of the low-voltage main line. Since the pair of cut-through blades are pressed via leaf springs by the respective insulating round bars provided in the opposite shape on the back surface, the pressing force of these cut-through blades hardly decreases. Therefore, there is no fear of deterioration during long-term use, and it can be used with confidence not only for thin electric wires but also for other electric wires.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional front view showing a state where four branches are connected by a four-branch type branch connector according to an embodiment of the present invention.
FIG. 2 is a partial cross-sectional side view showing a state where four branches are connected by a four-branch type branch connector according to an embodiment of the present invention.
FIG. 3 is a perspective view of a U-shaped cross section frame of the branch connector according to the embodiment of the present invention;
FIG. 4 is a perspective view of the branch connector according to the embodiment of the present invention in a state in which a cut-through portion and a fastening portion are respectively disassembled.
FIG. 5 is an exploded perspective view showing a state in which a male screw terminal or a female screw terminal is attached to each of two branch wires in the branch connector according to the embodiment of the present invention, and these are screwed and connected in an insulator. is there.
FIG. 6 is a perspective view showing a state where an insulator to which two branch wires are fixed is fitted into the bottom of the branch connector according to the embodiment of the present invention.
FIG. 7 is a front view showing a state where four low-voltage trunk lines are connected in four branches in a branch basin using the branch connector according to the embodiment of the present invention.
FIG. 8 is an end view taken along line XX in FIG. 7;
FIG. 9 is a partial cross-sectional front view showing a state where two branches are connected by a two-branch type branch connector according to another embodiment of the present invention.
FIG. 10 is a partial cross-sectional side view showing a state where two branches are connected by a two-branch type branch connector according to another embodiment of the present invention.
FIG. 11 is a partial cross-sectional front view showing a state of being branched and connected by a conventional branch type branch connector.
FIG. 12 is a partial cross-sectional side view showing a state where a branch connection is made by a conventional branch type branch connector.
[Explanation of symbols]
Reference Signs List A (4-branch type) branch connector B Low-voltage main line C branch line E (2-branch type) branch connector 1 U-shaped cross section frame 2 Cut-through section 3 Tightening section 5 Insulator 7 Tightening bolt 9 Screw plate 10 Hollow Part 11 Branch wire insertion part 12 Contact spring plate 14 Cut-through blade 17 Insulated round bar 19 Male screw terminal 20 Female screw terminal

Claims

In a multi-branch connector for connecting a low-voltage main line and two branch lines, the multi-branch connector has a frame having a substantially U-shaped cross section and a cut-through that is fitted into the frame to connect the low-voltage main line and the branch line. Part and tightening part,
The cut-through portion is composed of a pair of insulators, each of the pair of insulators is provided in a substantially rectangular parallelepiped shape having an inner hollow portion and a lower surface as an opening, and a cut-through blade is provided in the hollow portion. A cut-through blade is provided so as to protrude from inside the opening, a through hole connected to the hollow portion is provided substantially at the center of the upper surface of the insulator, an insulating rod is inserted into the through hole, and an insulating rod is inserted through the through hole. It is provided by providing a substantially cylindrical branch line insertion portion having an insertion hole connected to the hollow portion on one side surface,
The tightening portion is composed of a tightening bolt and a screw plate having a through screw hole substantially in the center,
When connecting the low-voltage main line and two branch lines,
In the cut-through portion, the branch line insertion portion of each of the insulators, a branch line having a terminal portion provided at the tip is inserted, and each terminal portion is fixed to a part of each of the cut-through blades in the hollow portion,
The insulator is turned upside down so that the opening is positioned on the upper surface, and one of the insulators in a state where the blade of the cut-through blade in contact with the branch line protrudes from the opening is placed in the frame having a substantially U-shaped cross section. And the terminal of the cut-through blade and the terminal of the branch line thereunder are supported by an insulating rod inserted through the through-hole. In this state, the low-voltage main line is inserted into the frame having a substantially U-shaped cross section. And placed on the cut-through blade of the one insulator,
The opening of the insulator is positioned on the lower surface, and the other insulator in a state where the blade of the cut-through blade in contact with the branch line protrudes from the opening is fitted into the frame having a substantially U-shaped cross section. And placed on the low-voltage main line,
The screw plate, in which the tightening bolt was screwed into the through screw hole, was passed across both sides of the upper portion of the frame body and locked, and the tip surface of the tightening bolt was inserted into the through hole in the upper surface of the other insulator. Press the upper surface of the insulating rod, further tighten the tightening bolts, press the terminal portion of the branch line and the cut-through blade with the insulating rod, insert the cut-through blade into the low-voltage trunk, and contact the core of the low-voltage trunk. A multi-branch connector characterized in that the low-voltage main line is pressed at the same time and the cut-through blade of the one insulator is inserted into and brought into contact with the core line of the low-voltage main line.

A predetermined length of the coating of the end of each branch line to be inserted into the branch line insertion portion of the insulator is stripped off, and the core wire at the corresponding location is covered with a terminal and attached.
When connecting a low-voltage main line and two branch lines,
The distal end of each branch line to which the terminal was attached was fitted from the branch line insertion portion of the insulator to the inside of the hollow portion, and at that location, a part of the terminal of each branch line and a substantially U-shaped cross section were provided. 2. The multi-branch connector according to claim 1, wherein a back portion of the cut-through blade is fixed and electrically connected.

In a multi-branch connector for connecting a low-voltage main line to four branch lines, the multi-branch connector is a cut-through for connecting the low-voltage main line and the branch line by fitting the frame having a substantially U-shaped cross section and the frame body. Part and tightening part,
The cut-through portion is composed of a pair of insulators, each of the pair of insulators is provided in a substantially rectangular parallelepiped shape having an inner hollow portion and a lower surface as an opening, and a cut-through blade is provided in the hollow portion. A cut-through blade is provided so as to protrude from inside the opening, a through hole connected to the hollow portion is provided substantially at the center of the upper surface of the insulator, an insulating rod is inserted into the through hole, and an insulating rod is inserted through the through hole. A substantially cylindrical branch line insertion portion having an insertion hole connected to the hollow portion is provided on each of two opposing side surfaces,
The tightening portion is composed of a tightening bolt and a screw plate having a through screw hole substantially in the center,
When connecting a low-voltage main line and four branch lines,
Insert two branch lines, each having a terminal portion at the tip, into the branch line insertion portions at two opposing positions of the insulator of the cut-through portion, and abut each other in the hollow portion. connection,
The opening is positioned on the upper surface with the insulator upside down, the cut-through blade is placed at a location where the branch line is connected in the hollow portion, and the cut-through blade in contact with each of the branch lines is opened. One of the insulators protruding from the portion is fitted into the bottom of the frame having the substantially U-shaped cross section, and the cut-through blade and the portion where the terminal portion of each of the branch wires thereunder are connected to the through-hole. Supported by an inserted insulating rod, in this state, the low-voltage main line is fitted into the frame having a substantially U-shaped cross section, and placed on the cut-through blade of the one insulator;
The opening of the insulator is positioned on the lower surface, and the cut-through blade is fitted into the hollow portion at a position where the terminal of each branch line is connected, and the cut-through blade in contact with each branch line is opened by the opening. The other insulator in a state protruding from the part is fitted into the frame having a substantially U-shaped cross section, and placed on the low-voltage main line,
The screw plate, in which the tightening bolt was screwed into the through screw hole, was passed across both sides of the upper portion of the frame body and locked, and the tip surface of the tightening bolt was inserted into the through hole in the upper surface of the other insulator. Press the upper surface of the insulating rod, further tighten the tightening bolts, press the terminal portion of the branch line and the cut-through blade with the insulating rod, insert the cut-through blade into the low-voltage trunk, and contact the core of the low-voltage trunk. A multi-branch connector characterized in that the low-voltage main line is pressed at the same time and the cut-through blade of the one insulator is inserted into and brought into contact with the core line of the low-voltage main line.

A predetermined length of the coating of the end of each branch line to be inserted into each branch line insertion portion of the insulator is peeled off, and the portion is attached with either a male screw terminal or a female screw terminal, and attached.
When connecting a low-voltage main line and four branch lines,
The distal end of each branch line to which the male screw terminal or the female screw terminal is attached is inserted into the hollow portion facing each other from the branch line insertion portion of each of the insulators, and at that point, the male screw terminal of each of the two branch lines. The multi-branch connector according to claim 3, wherein the connector and the female screw terminal are fitted to each other and are electrically connected.

In a multi-branch connector for connecting a low-voltage main line and a plurality of branch lines, a leaf spring is provided in a shape facing a back surface of a cut-through blade provided in a substantially U-shaped cross section in each hollow portion of the pair of insulators. , Respectively,
When the low-voltage main line is inserted with each cut-through blade in the frame having a substantially U-shaped cross section, the respective leaf springs are pressed by the insulating rods of the respective insulators. The multi-branch connector according to any one of claims 1 to 4, wherein the multi-branch connector is characterized in that the pressure of each cut-through blade is hardly reduced by being pressed.