JP3661581B2

JP3661581B2 - Circuit breaker

Info

Publication number: JP3661581B2
Application number: JP2000293073A
Authority: JP
Inventors: 満富田; 孝北村
Original assignee: Matsushita Electric Works Ltd
Current assignee: Panasonic Electric Works Co Ltd
Priority date: 2000-09-26
Filing date: 2000-09-26
Publication date: 2005-06-15
Anticipated expiration: 2020-09-26
Also published as: JP2002110021A

Description

【０００１】
【発明の属する技術分野】
本発明は、分電盤内に配設される主幹用の回路遮断器に関するものである。
【０００２】
【従来の技術】
この種の回路遮断器を用いた分電盤として、特開平９−８４２２１号公報に記載のものがある。この公報に記載された分電盤は住宅用分電盤であって、図１１に示すように、主幹回路遮断器（主幹ブレーカ）Ａ’および複数の分岐回路遮断器（分岐ブレーカ）Ｂ’を前面開口した直方体状の箱体６０’に収納してある。箱体６０’は横長の直方体状の形状に形成されており、図１１における左側に主幹回路遮断器Ａ’が配設され、主幹回路遮断器Ａ’の右側に分岐回路遮断器Ｂ’が配設されている。
【０００３】
ところで、住宅用分電盤は、室内の壁面などに取り付けられるものであるが、近年では住宅内で使用される電気製品の増加により回路数も増加し住宅用分電盤の大型化が問題になってきており、室内の美観を損なわないように小型化が望まれている。そこで、図１１に示す構成の住宅用分電盤においては、箱体６０’を横長の直方体状の形状に形成して、正面視における主幹回路遮断器Ａ’の右側において複数の分岐回路遮断器Ｂ’を横方向に並設し、且つ、主幹回路遮断器Ａ’のハンドル２ａ’の操作方向と各分岐回路遮断器Ｂ’のハンドル２ｂ’の操作方向とをいずれも上下方向として、操作方向を揃えてある。このため、主幹回路遮断器Ａ’は、箱体６０’内に配設された状態で、端子ねじ（図示せず）を備えたねじ付き端子よりなる電源側端子３’が器体１’の上端部の前面側に位置し、端子ねじ４５を備えたねじ付き端子よりなる負荷側端子４’が器体１’の下端部の前面側に位置している。また、分岐回路遮断器Ｂ’は、左右方向に並設され、下端部に電源側端子が位置し、上端部に負荷側端子が位置しており、箱体６０’内において左右方向に沿って配設された導電バー（主幹バー）５１’，５２’，５３’に電源側端子が接続されている。
【０００４】
ここにおいて、主幹回路遮断器Ａ’の各負荷側端子４’，４’，４’は器体１’の下端部の前面側において左右方向に並設されているので、各負荷側端子４’，４’，４’は、それぞれ折曲形成された送りバー５４，５４，５４を介して各導電バー５１’，５２’，５３’と電気的に接続されている。すなわち、図１１に示した分電盤においては、主幹回路遮断器Ａ’の各負荷側端子４’，４’，４’に各送りバー５４，５４，５４の一端部を上記端子ねじ４５，４５，４５の締め付けによりそれぞれ接続し、各送りバー５４，５４，５４の他端部を固定ねじ５５，５５，５５の締め付けによって各導電バー５１’，５２’，５３’にそれぞれ接続してある。
【０００５】
【発明が解決しようとする課題】
ところで、上記従来構成の主幹回路遮断器Ａ’は、負荷側端子４’，４’，４’を分電盤内に配設される導電バー５１’，５２’，５３’と電気的に接続するために送りバー５４，５４，５４が必要であって、しかも負荷側端子４’，４’，４’に送りバー５４，５４，５４の一端部を端子ねじ４５，４５，４５の締め付けにより接続し、さらに送りバー５４，５４，５４の他端部を固定ねじ５５，５５，５５の締め付けにより接続する必要あり、ねじ締付け作業が煩わしく導電バー５１’，５２’，５３’との接続に手間がかかるという不具合があった。また、ねじ締付箇所が多くなると、ねじ締付箇所の緩みに起因した発熱が起こる可能性が高くなるという不具合があった。
【０００６】
本発明は上記事由に鑑みて為されたものであり、その目的は、分電盤内の内器の電路として用いる導電バーとの接続が容易でねじ締め付け箇所の緩みに起因した発熱の可能性を少なくできる回路遮断器を提供することにある。
【０００７】
【課題を解決するための手段】
請求項１の発明は、上記目的を達成するために、器体に露設された複数の電源側端子および複数の負荷側端子を有し、電源側端子と負荷側端子との間の各電路にそれぞれ介挿された複数の接点部が器体内に収納されるとともに、接点部を開閉操作可能なハンドルが器体の前面側に露設され、分電盤内に配設される回路遮断器であって、前記負荷側端子は、前記器体から一体に突出する形で配置され、且つ、分電盤内の内器の電路として用いる導電バーとの接続部を有することを特徴とするものであり、負荷側端子が、前記器体から一体に突出する形で配置され、且つ、分電盤内の内器の電路として用いる導電バーとの接続部を有するので、負荷側端子と導電バーとの間に従来のような送りバーを介在させることなく直接接続することができるから、前記接続部と前記導電バーとの接続を端子ねじの締め付けにより行うようにしても従来に比べてねじ締め付け箇所を少なくできて、導電バーとの接続が容易になり、また、ねじ締め付け箇所の緩みに起因した発熱の可能性を少なくできる。
【０００８】
また、前記各負荷側端子は、前記電源側端子と前記ハンドルとの配列方向が上下方向となり前記ハンドルの操作方向が当該上下方向に沿うように前記分電盤内に配設したときに前記器体において前記導電バーの長手方向に直交する一側面から突出されているので、主幹回路遮断器として用い前記負荷側端子と前記導電バーとを直接接続すると、前記導電バーが前記ハンドルの開閉操作方向に対して直交する方向に延出することになるから、前記ハンドルの操作方向を前記導電バーに接続される分岐回路遮断器のハンドルの操作方向と揃えることができ、分電盤内に配設した状態での見栄えを良くすることができる。
【０００９】
また、前記器体は、前記一側面に沿って形成され且つ前記電源側端子および前記接点部から隔壁により隔離された収納部を有し、前記負荷側端子の一部が前記収納部に収納されているので、前記電源側端子および前記接点部それぞれと前記負荷側端子とを隔壁により絶縁することができ、また、前記負荷側端子を前記接点部が収納される空間とは別の収納部に収納するから、前記負荷側端子の収納作業が容易になる。
【００１１】
また、前記負荷側端子と前記各接点部とをそれぞれ電気的に接続する複数の被覆電線を備え、前記各被覆電線は前記収納部に収納されているので、前記収納部に被覆電線を配設し、この被覆電線を前記負荷側端子に接続していることにより、前記収納部を小さくすることができ、コンパクト化が図れる。
【００１２】
また、前記電源側端子と前記負荷側端子と前記接点部との組が３組設けられ、前記各負荷側端子の各接続部は、正面視において前記電源側端子の並設方向に直交する方向に並設され、且つ、前記器体の前方向を高さ方向とするとき正面視において隣り合う接続部が異なる高さ位置に配設されているので、各極の接続部間の絶縁間隔を長くすることができる。
【００１３】
また、前記電源側端子の並設方向において中央に配設された電源側端子に対応付けされた負荷側端子の接続部は、前記負荷側端子の並設方向における中央の位置であって前記高さ方向における第１の高さ位置に配設され、前記電源側端子の並設方向において両側に配設された電源側端子にそれぞれ対応付けされた各負荷側端子の接続部は、前記負荷側端子の並設方向における両側の位置であって前記高さ方向における第１の高さ位置よりも低い第２の高さ位置に配設されているので、単層三線式配線路に使用する場合、前記第１の高さ位置に接続部が配設される負荷側端子を中性極とし、前記第２の高さ位置に接続部が配設される２つの負荷側端子を電圧極とすることで中性極の接続部と電圧極の接続部とが触れるのを防ぐことができ、また、前記負荷側端子の並設方向における両側の負荷側端子が同一高さ位置に配設されていることにより、見栄えが良くなる。
【００１４】
また、前記負荷側端子は、Ｌ字状の形状に形成され、前記器体から突出する接続部である接続片と、接続片に直交し前記器体の前記一側面を外面とする周壁の内面に沿って配設される取付片とを備え、前記器体は、前記接点部および前記被覆電線が配設され且つ前記一側面の一部を外面とする第１の側壁に前記負荷側端子の並設方向において両側に配設される負荷側端子の接続片を外部に突出させる通孔が形成された前面開口のボディと、ボディの前面側に覆着され且つ前記負荷側端子の並設方向において中央に配設される負荷側端子を前記一側面の残りの部分を外面とする第２の側壁と前記第１の側壁との間で挟持するカバーとで構成され、前記ボディの第１の側壁には、前記負荷側端子の並設方向における両側の負荷側端子の各接続片をそれぞれ突出させるための通孔が形成され、前記カバーの前記第２の側壁と前記ボディの前記第１の側壁との突き合わせ面の少なくとも一方に前記負荷側端子の並設方向における中央の負荷側端子を外部に突出させるための切溝が形成され、前記両側の負荷側端子は、前記取付片の先端部が前方を向くように配設され、前記中央の負荷側端子は、前記取付片の先端部が後方を向くように配設されているので、前記負荷側端子をねじなどの固定具を用いることなく前記器体に配設することができて、前記各負荷側端子の取付片が前記ボディの前記第１の側壁の内面に当接して前記各負荷側端子が外部へ抜けるのを防止することができ、また、前記複数の負荷側端子に同一形状のものを使用することができ、前記負荷側端子の製造および管理が容易になるとともに組立作業が容易になって低コスト化を図ることができる。
請求項２の発明は、請求項１の発明において、前記電源側端子は、端子ねじを用いて電線導体が端子板に接続されるねじ付き端子であって、前記器体は、前記複数の電源側端子が前記器体の前面側において前記一側面に直交する方向に並設されるとともに、隣り合う前記電源側端子間を絶縁する絶縁壁が形成され、且つ、前記電源側端子を上側として正面視右側に前記収納部を形成するとともに前記収納部の一部を前記電源側端子よりも上方へ延出してあるので、前記電源側端子を上側として前記電源側端子に電線導体をねじ締め接続する場合に一番右側の前記電源側端子への電線導電の接続時の力を前記収納部で吸収することができ、前記一番右側の電源側端子の右側の壁の厚みを比較的薄くしても当該壁の先端部が折損するのを防ぐことができる。
【００１５】
請求項３の発明は、請求項１または請求項２の発明において、前記器体は、前記通孔の近傍において前記ボディの後壁から前方へ突出し前記第１の側壁との間に前記両側の各負荷側端子の取付片をそれぞれ挟持する第１のリブが突設され、前記各通孔は、前記ボディの後面から第１のリブの先端の高さ位置に少なくとも前記接続片の厚さを加えた位置までにわたって形成され、前記カバーは、前壁の後面から後方へ突出して前記ボディの前記第１の側壁の内面との間に前記並設方向における中央の負荷側端子の取付片を挟持する第２のリブが突設されるとともに、前壁の後面から前記両側の負荷側端子それぞれの取付片の先端まで延出する押え片が突設されているので、組立時において、両側の負荷側端子は前記第１の側壁の内面側から接続片を通孔に挿通させて接続片を前記ボディの底壁に近づける向きにずらし、中央の負荷側端子の接続片を前記第１の側壁における前記切溝に対応した部位に載置した状態で前記ボディに前記カバーを覆着すれば、両側の負荷側端子は第１のリブにより内方への移動が防止され且つ前記カバーの押え片により前方への移動が防止されて位置決めされ、また、中央の負荷側端子は第２のリブで内方への移動が防止されて位置決めされるから、各負荷側端子それぞれに前記導電バーを接続する作業が容易になる。
【００１６】
【発明の実施の形態】
まず、本発明に係る回路遮断器を主幹回路遮断器として備えた住宅用分電盤について図１を参照しながら説明する。図１に示す構成の住宅用分電盤は、１つの主幹回路遮断器Ａと複数の分岐回路遮断器Ｂが箱体６０の中に配置されている。なお、図１に示す構成の住宅用分電盤においては、２４個の分岐回路遮断器Ｂを上下２列に分けて各列ごとに１２個の分岐回路遮断器Ｂを並設してある。
【００１７】
箱体６０は、外周形状が矩形状に形成された底板６１の外周縁の全周に亘って周壁６２が前方に突設された形状に形成され、底板６１の中央部には矩形状に開口した開口窓６３が形成されている。底板６１には左右２個ずつの支持台（図示せず）が前方に突設されている。両支持台の周囲にはそれぞれ断面Ｌ字状であって矩形領域の角部をなすように配列されたガイド壁６５ａ，６５ｂが形成されている。上側の支持台には下方に隣接して底板６１からの突出寸法が当該支持台よりもやや大きい抜止ボス６６が形成されている。また、下側の支持台の周囲に設けたガイド壁６５ｂの前端面には下半分程度の受け片６７が連続一体に形成されている。ここに、底板６１から受け片６７までの距離は底板６１から支持台の先端面までの距離よりもやや大きく設定されている。
【００１８】
底板６１における開口窓６３の周縁は全周に亘って前方に突出する補強突条６８を形成しており、補強突条６８により開口窓６３の周部が補強されている。つまり、比較的大面積である開口窓６３を形成しながらも、補強突条６８により剛性を保つことができる。
【００１９】
箱体６０に形成した右側の支持台と左側の支持台との間には、主幹回路遮断器Ａや分岐回路遮断器Ｂなどの内器を取り付けるための架台７０が架設されている。架台７０は、全体としては矩形状の平面形状をなし、四隅にそれぞれ設けた支持片７１ａ，７１ｂのうち図１における右側の２つ支持片７１ｂ，７１ｂがそれぞれ箱体６０の底板６１から突設された支持台に載置されるとともに、図１における左側の２つの支持片７１ａ，７１ａが底板６１から突設された支持台に載置され、右側の支持台に螺入される取付ねじ７２を用いて右端部が箱体６０に固定され、左側の支持台に螺入される取付ねじ７２を用いて左端部が箱体６０に固定される。ここに、各支持片７１ａ，７１ｂには取付ねじ７２の頭部の直径よりも大きい丸孔状の大径部の上縁の一部に取付ねじ７２の直径よりも幅狭の溝部が連続する鍵穴状に形成された取付孔７３が形成されている。したがって、取付ねじ７２を支持台の固定孔（図示せず）に緩く螺入した状態で、取付ねじ７２の頭部に取付孔７３の大径部を通し、取付ねじ７２の頭部を溝部に対応する部位までスライドさせた後に取付ねじ７２を締め付けるようにすることによって、箱体６０への架台７０の取付作業を容易に行うことができる。また、上述したように支持台の周囲にはガイド壁６５ａ，６５ｂが形成されているから、架台７０の取付位置をガイド壁６５ａ，６５ｂに合わせることで位置決めが容易にでき、その上、下側のガイド壁６５ｂ，６５ｂには受け片６７，６７が形成されているから、下側の支持片７１ｂ，７１ａの一部を受け片６７，６７の後面側に重複させることで、取付ねじ７２が外れても受け片６７，６７で架台７０の荷重を受けることができる。さらに、取付孔７３の溝部に取付ねじ７２を挿入した状態では、取付孔７３の大径部に抜止ボス６６，６６が挿入されるように抜止ボス６６，６６の位置が設定されており、取付ねじ７２を締め付けた後には、支持片７１ｂ，７１ａは箱体６０に対して回り止めされることになる。また、抜止ボス６６，６６が取付孔７３の大径部に挿入されることによって、取付ねじ７２が多少緩んでも支持片７１ｂ，７１ａのがたつきが禁止される。例えば、地震などの外部振動によって取付ねじ７２に経年的な緩みが多少生じたとしても、箱体６０に対して架台７０が移動したり脱落したりするのを防止することができる。
【００２０】
ところで、上述の分岐回路遮断器Ｂは、架台７０において左右方向に沿って配設された導電バー５１，５２，５３に電源側端子が接続され器体の前面側に設けたハンドル２ｂの操作方向が上下方向となるように配設されている。すなわち、上下２列のうち上列の分岐回路遮断器Ｂは、下端部に電源側端子（図示せず）が設けられ、上端部に負荷側端子（図示せず）が設けられており、下列の分岐回路遮断器Ｂは、上端部に電源側端子（図示せず）が設けられ、下端部に負荷側端子が設けられている。
【００２１】
以下、主幹回路遮断器Ａについて図１ないし図１０を参照しながら説明する。
【００２２】
本実施形態の主幹回路遮断器Ａは、直方体状に形成された合成樹脂製の器体１を有し、器体１の上端部には端子台３０が形成されており、端子台３０にはそれぞれ端子ねじ３１を有したねじ付き端子よりなる３つの電源側端子（入力端子）３，３，３が左右方向に並設されている。端子台３０は、隣り合う電源側端子３，３間を絶縁する絶縁壁３５が形成されている。また、器体１の上端部の右端部から上方へ端子取付部１０（図２参照）が連続一体に突出しており、端子取付部１０の右側面１ａから負荷側端子（出力端子）４，４，４が突出する形で配置されている。要するに、器体１には、３つの電源側端子３，３，３と３つの負荷側端子４，４，４とが露設されている。ここにおいて、電源側端子３，３，３と負荷側端子４，４，４とは１対１で対応付けされており、電源側端子３，３，３にはそれぞれ電線導体（図示せず）が接続され、負荷側端子４，４，４にはそれぞれ導電バー５１，５２，５３が端子ねじ４３，４３，４３を用いて接続される。
【００２３】
なお、電源側端子３，３，３に電線導体をねじ締め接続する場合、締付け力を受けて電線導体が当たるのは左側および中央の電源側端子３，３の右側の壁としての絶縁壁３５，３５であり、絶縁壁３５，３５を厚くすればよいが、一番右側の電源側端子３の右側の壁となる隔壁２７（図３参照）は端子台３０の一番左側の壁と同一の厚みで形成されており、電線導体の締付け接続時に隔壁２７が先端から折損する恐れがある。しかしながら、本実施形態においては、隔壁２７の右側には内部空洞の収納部１５が形成されているので、電線導体の接続時の力を収納部１５で吸収することができ、隔壁２７が折損する恐れを少なくすることができる。また、収納部１５の一部は上述の端子取付部１０の内部にわたって形成されている。要するに、収納部１５の一部が電源側端子３，３，３よりも上方へ突出しているので、電線導体を電源側端子３，３，３に接続するときのスペースを十分取ることができ、電線導体を電源側端子３，３，３に接続する作業が容易となる。
【００２４】
また、主幹回路遮断器Ａの器体１内には、器体１の幅方向（図１における左右方向）に並設された３つの接点部２６，２６，２６（図３および図５参照）と、トリップ機構５と、接点部２６，２６，２６が介挿された電路に異常電流が流れたときに接点部２６，２６，２６を強制的に開極させるようにトリップ機構５を作動させる引外し装置６，６とが収納されており、３極の接点部２６，２６，２６を器体１の前面に露設した単一のハンドル２ａによって開閉操作可能としてある。
【００２５】
主幹回路遮断器の器体１は、前面が開放されたボディ１１と、ボディ１１の前面側に覆着されるカバー１２とから構成されている。ボディ１１は、ボディ１１の内部空間を各極毎に区分けする絶縁壁２８（図３参照）が形成されており、隣り合う接点部２６，２６間の絶縁を図っている。
【００２６】
接点部２６は、電源側端子３，３，３の端子板３１，３１，３１の下端縁から延設されたＬ字状の接点保持片３３，３３，３３の先端部に固着された固定接点２１，２１，２１と、導電性金属により短冊状に形成された可動接触子２５，２５，２５の長手方向の一端部に固着され固定接点２１，２１，２１に離接する可動接点２２，２２，２２とで構成される。各可動接触子２５，２５，２５は、それぞれ被覆電線７，７，７を介して上述の負荷側端子４，４，４に接続されている。したがって、主幹回路遮断器Ａは、器体１の上部前面に露設した電源側端子３と器体１の右側面に露設した負荷側端子４との間に、電源側端子３−固定接点２１−可動接点２２−被覆電線７−負荷側端子４の経路の電路が３路形成されている。ここにおいて、被覆電線７，７，７は、器体１の下面および右側面に沿って器体１内に形成されたＬ字状の収納部１５内で引き回してある。要するに、被覆電線７，７，７の一部は収納部１５に配設されている。ここにおいて、器体１における収納部１５は、電源側端子３，３，３および接点部２６，２６，２６から隔壁２７により隔離されており、負荷側端子４，４，４の一部が収納部１５に収納されているので、電源側端子３，３，３および接点部２６，２６，２６それぞれと負荷側端子４，４，４とを隔壁２７により絶縁することができ、また、負荷側端子４，４，４を接点部２６，２６，２６が収納される空間とは別の収納部１５に収納するから、収納部１５への負荷側端子４，４，４の収納作業が容易になる。
【００２７】
ハンドル２ａは、器体１の前面に開口する窓孔２９（図５参照）を通して起伏する操作部８（図５参照）を有している。ハンドル２ａは、操作部８が窓孔２９の開口面と略面一になる位置と、操作部８が窓孔２９から突出する位置との間で起伏自在になっている。
【００２８】
ここに、本実施形態の主幹回路遮断器Ａでは、ハンドル２ａの操作部８を倒して窓孔２９の開口面と略面一にした状態ではトリップ機構５がセットされ接点部２６が閉極状態に保たれており、閉極状態からハンドル２ａを図５のように起こして窓孔２９から突出させると、可動接点２２が固定接点２１から離れて開極する。すなわち、ハンドル２ａの操作部８を起こすことによって開極状態になる。また、上述の閉極状態において、引き外し装置６を通して異常電流が流れるとトリップ機構５によって接点部２６が開極する。なお、ハンドル２ａの操作部８を起伏動作させたとき、操作部８の先端部の位置は上下方向における高さ位置が変位するので、器体１を正面視した場合には、ハンドル２ａの開閉操作方向を上下方向とみなすことができる。したがって、各負荷側端子４，４，４は、電源側端子３，３，３とハンドル２ａとの配列方向が上下方向となりハンドル２ａの操作方向が当該上下方向に沿うように分電盤内に配設したときに器体１において上述の導電バー５１，５２，５３の長手方向に直交する右側面１ａから突出されているので、負荷側端子４，４，４と導電バー５１，５２，５３とを直接接続することにより、導電バー５１，５２，５３がハンドル２ａの開閉操作方向に対して直交する方向に延出することになるから、ハンドル２ａの操作方向を導電バー５１，５２，５３に接続される分岐回路遮断器Ｂのハンドル２ｂの操作方向と揃えることができ、分電盤内に配設した状態での見栄えを良くすることができる。
【００２９】
ところで、本実施形態の主幹回路遮断器Ａは、上述のように３つの負荷側端子４，４，４が合成樹脂製の器体１の右側面１ａから一体に突設されている。各負荷側端子４，４，４は、Ｌ字状に形成されており、器体１から突出する接続片４１，４１，４１と、接続片４１，４１，４１に直交し器体１の右側面を外面とする周壁の内面に沿って配設される取付片４２，４２，４２とを備えている。ここにおいて、取付片４２，４２，４２にはそれぞれ上述の被覆電線７，７，７が接続されている。また、接続片４１，４１，４１には、端子ねじ４３，４３，４３（図１参照）が挿通される挿通孔４１ａ，４１ａ，４１ａが形成されており、端子ねじ４３，４３，４３を用いて導電バー５１，５２，５３と接続できる。すなわち、接続片４１，４１，４１を導電バー５１，５２，５３に重ね合わせた状態で端子ねじ４３，４３，４３を挿通孔４１ａ，４１ａ，４１ａに挿通させ導電バー５１，５２，５３のねじ孔（図示せず）に螺入すると、負荷側端子４，４，４と導電バー５１，５２，５３とを機械的および電気的に接続することができる。要するに、本実施形態の主幹回路遮断器Ａにおける負荷側端子４，４，４は上記従来構成における負荷側端子４’，４’４’の機能と送りバー５４，５４，５４の機能とを併せ持っている。なお、本実施形態では、接続片４１，４１，４１が導電バー５１，５２，５３との接続部を構成している。
【００３０】
また、各負荷側端子４，４，４の各接続片４１，４１，４１は、正面視において電源側端子３，３，３の並設方向に直交する方向に並設され、且つ、器体１の前方向（図４における左方向）を高さ方向とするとき正面視において隣り合う接続片４１が異なる高さ位置に配設されているので、各極の接続片４１間の絶縁間隔を長くすることができる。ここに、電源側端子３，３，３の並設方向において中央に配設された電源側端子３に対応付けされた負荷側端子４の接続片４１は、負荷側端子４，４，４の並設方向における中央の位置であって上記高さ方向における第１の高さ位置に配設され、電源側端子４，４，４の並設方向において両側に配設された電源側端子４，４にそれぞれ対応付けされた各負荷側端子３，３、の接続片４１，４１は、負荷側端子４，４，４の並設方向における両側の位置であって上記高さ方向における第１の高さ位置よりも低い第２の高さ位置に配設されているので、本実施形態のような単層三線式配線路に使用する場合、上記第１の高さ位置に接続片４１が配設される負荷側端子４を中性極とし、上記第２の高さ位置に接続片４１が配設される２つの負荷側端子４，４を電圧極とすることで中性極の接続片４１と電圧極の接続片４１とが触れるのを防ぐことができ、また、負荷側端子４，４，４の並設方向における両側の負荷側端子４，４が同一高さ位置に配設されていることにより、見栄えが良くなる。
【００３１】
ところで、器体１における上述の右側面１ａの一部を外面とするボディ１１の第１の側壁に、負荷側端子４の接続片４１を外部に突出させる通孔１６，１６が形成され、上述の右側面の残りの部分を外面とするカバー１２の第２の側壁とボディ１１の第１の側壁との突き合わせ面の少なくとも一方（図示例ではカバー２２の第２の側壁）に負荷側端子４，４，４の並設方向における中央の負荷側端子４を外部に突出させるための切溝１４（図７および図９参照）が形成され、両側の負荷側端子４，４は、取付片４１の先端部が前方を向くように配設され、中央の負荷側端子４は、取付片４１の先端部が後方を向くように配設されている（図６参照）。したがって、負荷側端子４，４，４をねじなどの固定具を用いることなく器体１に配設することができて、各負荷側端子４，４，４の取付片４１，４１，４１がボディ１１の上記第１の側壁の内面に当接して各負荷側端子４，４，４が外部へ抜けるのを防止することができ、また、全ての負荷側端子４，４，４に同一形状のものを使用することができ、負荷側端子４，４，４の製造および管理が容易になるとともに組立作業が容易になって低コスト化を図ることができる。
【００３２】
ここにおいて、器体１は、各通孔１６，１６の近傍においてボディ１１の後壁から前方へ突出し上記第１の側壁との間に上記両側の各負荷側端子４，４の取付片４１，４１をそれぞれ挟持する第１のリブ１８，１８が突設されている。また、各通孔１６，１６は、ボディ１１の後面から第１のリブ１８，１８の先端の高さ位置に少なくとも接続片４１，４１の厚さを加えた位置までにわたって形成され、カバー１２は、前壁の後面から後方へ突出してボディ１１の上記第１の側壁の内面との間に上記並設方向における中央の負荷側端子４の取付片４２を挟持する第２のリブ１９が突設されるとともに、前壁の後面から両側の負荷側端子４，４それぞれの取付片４２，４２の先端まで延出する押え片２０，２０が突設されている。
【００３３】
したがって、組立時において、両側の負荷側端子４，４は、図１０に示すように上記第１の側壁の内面側から接続片４１を通孔１６に挿通させ（図１０における左側から右側へ挿通させ）、取付片４２が図１０において第１のリブ１８よりも右側にくるまで挿通し、その後、接続片４１をボディ１１の底壁に近づける向きにずらし、中央の負荷側端子４の接続片４１を上記第１の側壁における切溝１４に対応して突出した部位である突起１３に載置した状態でボディ１１にカバー１２を覆着すれば、両側の負荷側端子４，４は第１のリブ１８，１８により内方への移動が防止され且つカバー１２の押え片２０，２０により前方への移動が防止されて位置決めされ、また、中央の負荷側端子４は第２のリブ１９で内方への移動が防止されて位置決めされるから、各負荷側端子４，４，４それぞれに導電バー５１，５２，５３を接続する作業が容易になる。なお、ボディ１１における上記第１の側壁の内面には、通孔１６，１６それぞれの周部に取付片４２，４２の外周形状に沿った形状に形成されて取付片４２，４２を位置決めするガイド壁１７，１７が突設されており、各取付片４２，４２の一部は通孔１６，１６の開口周縁に重複している。
【００３４】
しかして、本実施形態の主幹回路遮断器Ａでは、負荷側端子４，４，４が、器体１から一体に突出する形で配置され、且つ、分電盤内の内器の電路として用いる導電バー５１，５２，５３との接続部を有するので、負荷側端子４，４，４と導電バー５１，５２，５３との間に従来のような送りバー５４，５４，５４を介在させることなく直接接続することができるから従来に比べてねじ締め付け箇所を少なくできて、導電バー５１，５２，５３との接続が容易になり、また、ねじ締め付け箇所の緩みに起因した発熱の可能性を少なくできる。
【００３５】
【発明の効果】
請求項１の発明は、器体に露設された複数の電源側端子および複数の負荷側端子を有し、電源側端子と負荷側端子との間の各電路にそれぞれ介挿された複数の接点部が器体内に収納されるとともに、接点部を開閉操作可能なハンドルが器体の前面側に露設され、分電盤内に配設される回路遮断器であって、前記負荷側端子は、前記器体から一体に突出する形で配置され、且つ、分電盤内の内器の電路として用いる導電バーとの接続部を有するものであり、負荷側端子が、前記器体から一体に突出する形で配置され、且つ、分電盤内の内器の電路として用いる導電バーとの接続部を有するので、負荷側端子と導電バーとの間に従来のような送りバーを介在させることなく直接接続することができるから、前記接続部と前記導電バーとの接続を端子ねじの締め付けにより行うようにしても従来に比べてねじ締め付け箇所を少なくできて、導電バーとの接続が容易になるという効果があり、また、ねじ締め付け箇所の緩みに起因した発熱の可能性を少なくできるという効果がある。
【００３６】
また、前記各負荷側端子は、前記電源側端子と前記ハンドルとの配列方向が上下方向となり前記ハンドルの操作方向が当該上下方向に沿うように前記分電盤内に配設したときに前記器体において前記導電バーの長手方向に直交する一側面から突出されているので、主幹回路遮断器として用い前記負荷側端子と前記導電バーとを直接接続すると、前記導電バーが前記ハンドルの開閉操作方向に対して直交する方向に延出することになるから、前記ハンドルの操作方向を前記導電バーに接続される分岐回路遮断器のハンドルの操作方向と揃えることができ、分電盤内に配設した状態での見栄えを良くすることができるという効果がある。
【００３７】
また、前記器体は、前記一側面に沿って形成され且つ前記電源側端子および前記接点部から隔壁により隔離された収納部を有し、前記負荷側端子の一部が前記収納部に収納されているので、前記電源側端子および前記接点部それぞれと前記負荷側端子とを隔壁により絶縁することができ、また、前記負荷側端子を前記接点部が収納される空間とは別の収納部に収納するから、前記負荷側端子の収納作業が容易になるという効果がある。
【００３９】
また、前記負荷側端子と前記各接点部とをそれぞれ電気的に接続する複数の被覆電線を備え、前記各被覆電線は前記収納部に収納されているので、前記収納部に被覆電線を配設し、この被覆電線を前記負荷側端子に接続していることにより、前記収納部を小さくすることができ、コンパクト化が図れるという効果がある。
【００４０】
また、前記電源側端子と前記負荷側端子と前記接点部との組が３組設けられ、前記各負荷側端子の各接続部は、正面視において前記電源側端子の並設方向に直交する方向に並設され、且つ、前記器体の前方向を高さ方向とするとき正面視において隣り合う接続部が異なる高さ位置に配設されているので、各極の接続部間の絶縁間隔を長くすることができるという効果がある。
【００４１】
また、前記電源側端子の並設方向において中央に配設された電源側端子に対応付けされた負荷側端子の接続部は、前記負荷側端子の並設方向における中央の位置であって前記高さ方向における第１の高さ位置に配設され、前記電源側端子の並設方向において両側に配設された電源側端子にそれぞれ対応付けされた各負荷側端子の接続部は、前記負荷側端子の並設方向における両側の位置であって前記高さ方向における第１の高さ位置よりも低い第２の高さ位置に配設されているので、単層三線式配線路に使用する場合、前記第１の高さ位置に接続部が配設される負荷側端子を中性極とし、前記第２の高さ位置に接続部が配設される２つの負荷側端子を電圧極とすることで中性極の接続部と電圧極の接続部とが触れるのを防ぐことができ、また、前記負荷側端子の並設方向における両側の負荷側端子が同一高さ位置に配設されていることにより、見栄えが良くなるという効果がある。
【００４２】
また、前記負荷側端子は、Ｌ字状の形状に形成され、前記器体から突出する接続部である接続片と、接続片に直交し前記器体の前記一側面を外面とする周壁の内面に沿って配設される取付片とを備え、前記器体は、前記接点部および前記被覆電線が配設され且つ前記一側面の一部を外面とする第１の側壁に前記負荷側端子の並設方向において両側に配設される負荷側端子の接続片を外部に突出させる通孔が形成された前面開口のボディと、ボディの前面側に覆着され且つ前記負荷側端子の並設方向において中央に配設される負荷側端子を前記一側面の残りの部分を外面とする第２の側壁と前記第１の側壁との間で挟持するカバーとで構成され、前記ボディの第１の側壁には、前記負荷側端子の並設方向における両側の負荷側端子の各接続片をそれぞれ突出させるための通孔が形成され、前記カバーの前記第２の側壁と前記ボディの前記第１の側壁との突き合わせ面の少なくとも一方に前記負荷側端子の並設方向における中央の負荷側端子を外部に突出させるための切溝が形成され、前記両側の負荷側端子は、前記取付片の先端部が前方を向くように配設され、前記中央の負荷側端子は、前記取付片の先端部が後方を向くように配設されているので、前記負荷側端子をねじなどの固定具を用いることなく前記器体に配設することができて、前記各負荷側端子の取付片が前記ボディの前記第１の側壁の内面に当接して各負荷側端子が外部へ抜けるのを防止することができ、また、前記複数の負荷側端子に同一形状のものを使用することができ、前記負荷側端子の製造および管理が容易になるとともに組立作業が容易になって低コスト化を図ることができるという効果がある。
請求項２の発明は、請求項１の発明において、前記電源側端子は、端子ねじを用いて電線導体が端子板に接続されるねじ付き端子であって、前記器体は、前記複数の電源側端子が前記器体の前面側において前記一側面に直交する方向に並設されるとともに、隣り合う前記電源側端子間を絶縁する絶縁壁が形成され、且つ、前記電源側端子を上側として正面視右側に前記収納部を形成するとともに前記収納部の一部を前記電源側端子よりも上方へ延出してあるので、前記電源側端子を上側として前記電源側端子に電線導体をねじ締め接続する場合に一番右側の前記電源側端子への電線導電の接続時の力を前記収納部で吸収することができ、前記一番右側の電源側端子の右側の壁の厚みを比較的薄くしても当該壁の先端部が折損するのを防ぐことができるという効果がある。
【００４３】
請求項３の発明は、請求項１または請求項２の発明において、前記器体は、前記通孔の近傍において前記ボディの後壁から前方へ突出し前記第１の側壁との間に前記両側の各負荷側端子の取付片をそれぞれ挟持する第１のリブが突設され、前記各通孔は、前記ボディの後面から第１のリブの先端の高さ位置に少なくとも前記接続片の厚さを加えた位置までにわたって形成され、前記カバーは、前壁の後面から後方へ突出して前記ボディの前記第１の側壁の内面との間に前記並設方向における中央の負荷側端子の取付片を挟持する第２のリブが突設されるとともに、前壁の後面から前記両側の負荷側端子それぞれの取付片の先端まで延出する押え片が突設されているので、組立時において、両側の負荷側端子は前記第１の側壁の内面側から接続片を通孔に挿通させて接続片を前記ボディの底壁に近づける向きにずらし、中央の負荷側端子の接続片を前記第１の側壁における前記切溝に対応した部位に載置した状態で前記ボディに前記カバーを覆着すれば、両側の負荷側端子は第１のリブにより内方への移動が防止され且つ前記カバーの押え片により前方への移動が防止されて位置決めされ、また、中央の負荷側端子は第２のリブで内方への移動が防止されて位置決めされるから、各負荷側端子それぞれに前記導電バーを接続する作業が容易になるという効果がある。
【図面の簡単な説明】
【図１】本発明の回路遮断器を主幹回路遮断器として配設した住宅用分電盤の正面図である。
【図２】同上における主幹回路遮断器の正面図である。
【図３】同上における主幹回路回路遮断器のカバーを取り外した状態の正面図である。
【図４】同上における主幹回路遮断器の右側面図である。
【図５】同上における主幹回路遮断器の断面図である。
【図６】同上における主幹回路遮断器の一部破断した右側面図である。
【図７】同上における主幹回路遮断器の要部分解斜視図である。
【図８】同上における主幹回路遮断器の要部断面図である。
【図９】同上における主幹回路遮断器の要部断面図である。
【図１０】同上における主幹回路遮断器の組立方法の説明図である。
【図１１】従来の住宅用分電盤の正面図である。
【符号の説明】
１器体
３電源側端子
４負荷側端子
１０端子取付部
３０端子台
４１接続片
４３端子ねじ
５１導電バー
５２導電バー
５３導電バー
Ａ主幹回路遮断器
Ｂ分岐回路遮断器[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a main circuit breaker disposed in a distribution board.
[0002]
[Prior art]
As a distribution board using this type of circuit breaker, there is one disclosed in JP-A-9-84221. The distribution board described in this publication is a residential distribution board. As shown in FIG. 11, a main circuit breaker (main circuit breaker) A ′ and a plurality of branch circuit breakers (branch breakers) B ′ are provided. It is housed in a rectangular parallelepiped box 60 'having a front opening. The box body 60 'is formed in a horizontally long rectangular parallelepiped shape. The main circuit breaker A' is arranged on the left side in FIG. 11, and the branch circuit breaker B 'is arranged on the right side of the main circuit breaker A'. It is installed.
[0003]
By the way, residential distribution boards are installed on indoor wall surfaces, etc., but in recent years, the number of circuits has increased due to the increase in electrical products used in houses, and the increase in the size of residential distribution boards has become a problem. Therefore, downsizing is desired so as not to impair the aesthetics of the room. Accordingly, in the residential distribution board having the configuration shown in FIG. 11, the box body 60 ′ is formed in a horizontally long rectangular parallelepiped shape, and a plurality of branch circuit breakers are provided on the right side of the main circuit breaker A ′ in a front view. B ′ is arranged in parallel in the horizontal direction, and the operation direction of the handle 2a ′ of the main circuit breaker A ′ and the operation direction of the handle 2b ′ of each branch circuit breaker B ′ are both vertical directions. Are aligned. For this reason, the main circuit breaker A ′ is arranged in the box body 60 ′, and the power supply side terminal 3 ′ composed of a screwed terminal provided with a terminal screw (not shown) is the main body 1 ′. A load-side terminal 4 ′, which is located on the front surface side of the upper end portion and is formed of a screwed terminal provided with a terminal screw 45, is located on the front surface side of the lower end portion of the container body 1 ′. Further, the branch circuit breakers B ′ are juxtaposed in the left-right direction, the power-side terminal is located at the lower end, the load-side terminal is located at the upper end, and along the left-right direction in the box body 60 ′. A power supply side terminal is connected to the disposed conductive bars (main trunk bars) 51 ′, 52 ′, and 53 ′.
[0004]
Here, since each load side terminal 4 ', 4', 4 'of main circuit breaker A' is arranged in parallel in the left-right direction in the front side of the lower end part of vessel 1 ', each load side terminal 4' , 4 ′, 4 ′ are electrically connected to the respective conductive bars 51 ′, 52 ′, 53 ′ via feed bars 54, 54, 54 that are bent. That is, in the distribution board shown in FIG. 11, one end portion of each feed bar 54, 54, 54 is connected to each of the load-side terminals 4 ′, 4 ′, 4 ′ of the main circuit breaker A ′. The other ends of the feed bars 54, 54, 54 are connected to the conductive bars 51 ', 52', 53 'by fastening the fixing screws 55, 55, 55, respectively. .
[0005]
[Problems to be solved by the invention]
By the way, the main circuit breaker A ′ having the conventional configuration electrically connects the load side terminals 4 ′, 4 ′, 4 ′ to the conductive bars 51 ′, 52 ′, 53 ′ disposed in the distribution board. Feed bars 54, 54, 54 are required, and one end of the feed bars 54, 54, 54 is fastened to the load side terminals 4 ′, 4 ′, 4 ′ by tightening terminal screws 45, 45, 45. In addition, it is necessary to connect the other end portions of the feed bars 54, 54, 54 by fastening the fixing screws 55, 55, 55, and the screw tightening operation is troublesome, and the connection to the conductive bars 51 ′, 52 ′, 53 ′ is required. There was a problem that it took time and effort. Further, when the number of screw tightening points increases, there is a problem that the possibility of heat generation due to looseness of the screw tightening points increases.
[0006]
The present invention has been made in view of the above-mentioned reasons, and its purpose is that it is easy to connect with a conductive bar used as an electric circuit of an internal unit in a distribution board, and the possibility of heat generation due to loosening of screw tightening points. It is an object of the present invention to provide a circuit breaker that can reduce the number of circuit breakers.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the first aspect of the present invention has a plurality of power supply side terminals and a plurality of load side terminals that are exposed in the body, and each electric circuit between the power supply side terminals and the load side terminals. A circuit breaker in which a plurality of contact portions inserted in the housing are housed in the body, and a handle capable of opening and closing the contact portions is exposed on the front side of the body and disposed in the distribution board The load side terminal is arranged so as to protrude integrally from the container body, and has a connection portion with a conductive bar used as an electric path of the internal unit in the distribution board. And the load side terminal is disposed so as to protrude integrally from the container body and has a connection portion with a conductive bar used as an electric path of the internal unit in the distribution board. Can be connected directly without any conventional feed bar Therefore, even if the connection portion and the conductive bar are connected by tightening the terminal screw, the number of screw tightening points can be reduced as compared with the conventional case, and the connection with the conductive bar is facilitated. It is possible to reduce the possibility of heat generation due to the looseness of the.
[0008]
  In addition,Each load side terminalThe power supplySide terminalAnd said cThe direction of arrangement with theRAs the main circuit breaker is projected from one side surface perpendicular to the longitudinal direction of the conductive bar in the container body when disposed in the distribution board so that the operation direction of the handle is along the vertical direction, When the load side terminal and the conductive bar are directly connected, the conductive bar extends in a direction orthogonal to the opening / closing operation direction of the handle. The operating direction of the handle of the branch circuit breaker to be connected can be aligned, and the appearance in the state of being arranged in the distribution board can be improved.
[0009]
  In addition,The container body has a storage part formed along the one side surface and separated from the power supply side terminal and the contact part by a partition wall, and a part of the load side terminal is stored in the storage part. The power supply side terminal and the contact part can be insulated from the load side terminal by a partition wall, and the load side terminal is stored in a storage part separate from the space in which the contact part is stored. The load side terminal can be easily stored.
[0011]
  In addition,Provided with a plurality of covered electric wires that electrically connect the load side terminals and the respective contact portions, respectively, and since each of the covered electric wires is stored in the storage portion, the covered electric wires are disposed in the storage portion, Sheathed wireThe negativeBy connecting to the load side terminal, the said accommodating part can be made small and size reduction can be achieved.
[0012]
  In addition,Three sets of the power supply side terminal, the load side terminal, and the contact portion are provided, and the connection portions of the load side terminals are arranged in parallel in a direction orthogonal to the parallel arrangement direction of the power supply side terminals in a front view. In addition, when the front direction of the vessel is the height direction, the adjacent connection portions are arranged at different height positions in front view, so that the insulation interval between the connection portions of each pole is increased. Can do.
[0013]
  In addition,The connection portion of the load side terminal associated with the power supply side terminal disposed in the center in the direction in which the power supply side terminals are arranged is a center position in the direction in which the load side terminals are arranged in the height direction. The connection portions of the load side terminals, which are arranged at the first height position and are respectively associated with the power source side terminals arranged on both sides in the direction in which the power source side terminals are arranged, are arranged in parallel with the load side terminals. Since it is disposed at a second height position that is lower than the first height position in the height direction on both sides in the installation direction, when used in a single-layer three-wire wiring path, A load-side terminal having a connection portion disposed at a height position of 1 is a neutral electrode, and two load-side terminals having a connection portion disposed at the second height position are a voltage electrode. The contact portion of the negative electrode and the connection portion of the voltage electrode can be prevented from touching, and the load By both sides of the load-side terminal in the arrangement direction of the terminals are arranged at the same height position, appearance is improved.
[0014]
  In addition,The load side terminal is formed in an L-shape.The vesselA connecting piece projecting from the body, and a mounting piece disposed along the inner surface of the peripheral wall perpendicular to the connecting piece and having the one side surface of the container as an outer surface, Contact pieces of the load side terminals arranged on both sides in the parallel arrangement direction of the load side terminals on the first side wall having the contact portion and the covered electric wire and having a part of the one side as an outer surface The body of the front opening formed with a through-hole to project, and the load side terminal that is covered on the front side of the body and disposed in the center in the direction in which the load side terminals are arranged, It is comprised by the cover pinched between the 2nd side wall used as an outer surface, and the said 1st side wall, and the 1st side wall of the said body has a load side terminal of the both sides in the juxtaposition direction of the said load side terminal A through-hole for projecting each connection piece is formed, in front of the cover. A kerf is formed in at least one of the abutting surfaces of the second side wall and the first side wall of the body for projecting a central load side terminal in the juxtaposition direction of the load side terminals to the outside. The load-side terminal of the mounting piece is disposed so that the front end portion of the mounting piece faces frontward, and the center load-side terminal is disposed so that the front end portion of the mounting piece faces rearward. The load side terminal can be arranged on the container without using a fixing tool such as a screw., Each of the aboveThe load-side terminal mounting piece abuts against the inner surface of the first side wall of the body.EachThe load side terminal can be prevented from pulling outside, and, The compoundSame number of load side terminals can be usedThe negativeManufacture and management of the load side terminals are facilitated, and the assembly work is facilitated to reduce costs..
  According to a second aspect of the present invention, in the first aspect of the invention, the power supply side terminal is a screwed terminal in which a wire conductor is connected to a terminal plate using a terminal screw, and the container body includes the plurality of power supplies. Side terminals are juxtaposed in a direction orthogonal to the one side surface on the front side of the vessel body, an insulating wall is formed to insulate between the adjacent power supply side terminals, and the power supply side terminals are on the front side. Since the storage part is formed on the right side of the view and a part of the storage part extends upward from the power supply side terminal, the wire conductor is screwed and connected to the power supply side terminal with the power supply side terminal as the upper side. In this case, it is possible to absorb the force at the time of connection of the electric wire conduction to the power supply side terminal on the rightmost side by the storage portion, and to make the right wall thickness of the power supply side terminal on the rightmost side relatively thin. To prevent the tip of the wall from breaking It can be.
[0015]
  Claim3Claimed inventionClaim 1 or Claim 2In the invention, the container body protrudes forward from the rear wall of the body in the vicinity of the through hole, and holds the mounting pieces of the load side terminals on both sides between the first side walls. Each through hole is formed from the rear surface of the body to the height position of the tip end of the first rib and at least the thickness of the connection piece, and the cover is formed on the front wall. A second rib projecting rearward from the rear surface and sandwiching the mounting piece of the central load side terminal in the juxtaposition direction between the inner surface of the first side wall of the body and protruding from the front wall Since pressing pieces extending from the rear surface to the tips of the mounting pieces of the load side terminals on both sides protrude from the rear surface, the load side terminals on both sides have connecting pieces from the inner surface side of the first side wall during assembly. Insert the connecting piece into the bottom of the body If the cover is covered on the body in a state where the connecting piece of the central load side terminal is placed on the portion corresponding to the cut groove in the first side wall, the load side terminals on both sides The first rib is positioned to prevent inward movement and the cover pressing piece is prevented from moving forward, and the center load side terminal is moved inward by the second rib. Therefore, the work of connecting the conductive bar to each load side terminal is facilitated.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
First, a residential distribution board equipped with a circuit breaker according to the present invention as a main circuit breaker will be described with reference to FIG. In the residential distribution board having the configuration shown in FIG. 1, one main circuit breaker A and a plurality of branch circuit breakers B are arranged in a box 60. In the residential distribution board having the configuration shown in FIG. 1, 24 branch circuit breakers B are divided into two upper and lower rows, and 12 branch circuit breakers B are arranged in parallel for each row.
[0017]
The box body 60 is formed in a shape in which a peripheral wall 62 protrudes forward over the entire outer periphery of the bottom plate 61 whose outer peripheral shape is formed in a rectangular shape, and is opened in a rectangular shape in the center of the bottom plate 61. An open window 63 is formed. The bottom plate 61 has two left and right support bases (not shown) protruding forward. Guide walls 65a and 65b each having an L-shaped cross section and arranged so as to form a corner of a rectangular region are formed around both support bases. The upper support base is formed with a retaining boss 66 adjacent to the lower side and having a protruding dimension from the bottom plate 61 slightly larger than that of the support base. A receiving piece 67 of about the lower half is formed continuously and integrally on the front end surface of the guide wall 65b provided around the lower support base. Here, the distance from the bottom plate 61 to the receiving piece 67 is set to be slightly larger than the distance from the bottom plate 61 to the front end surface of the support base.
[0018]
The peripheral edge of the opening window 63 in the bottom plate 61 forms a reinforcing protrusion 68 protruding forward over the entire circumference, and the peripheral portion of the opening window 63 is reinforced by the reinforcing protrusion 68. That is, the rigidity can be maintained by the reinforcing protrusion 68 while the opening window 63 having a relatively large area is formed.
[0019]
Between the right support base and the left support base formed in the box body 60, a base 70 for mounting internal devices such as the main circuit breaker A and the branch circuit breaker B is installed. The gantry 70 has a rectangular planar shape as a whole, and two support pieces 71 b and 71 b on the right side in FIG. 1 out of the support pieces 71 a and 71 b provided at the four corners respectively project from the bottom plate 61 of the box body 60. The mounting screws 72 are placed on the support base, and the left two support pieces 71a and 71a in FIG. 1 are placed on the support base projecting from the bottom plate 61 and screwed into the right support base. The right end portion is fixed to the box body 60 using the, and the left end portion is fixed to the box body 60 using the mounting screw 72 screwed into the left support base. Here, in each of the support pieces 71a and 71b, a groove portion narrower than the diameter of the mounting screw 72 is continuous with a part of the upper edge of the large-diameter portion having a round hole shape larger than the diameter of the head of the mounting screw 72. A mounting hole 73 formed in a keyhole shape is formed. Therefore, with the mounting screw 72 loosely screwed into a fixing hole (not shown) of the support base, the large diameter portion of the mounting hole 73 is passed through the head of the mounting screw 72, and the head of the mounting screw 72 is used as a groove. By attaching the mounting screw 72 after sliding to the corresponding part, the mounting work of the gantry 70 to the box body 60 can be easily performed. Moreover, since the guide walls 65a and 65b are formed around the support base as described above, the positioning can be facilitated by matching the mounting position of the gantry 70 with the guide walls 65a and 65b. Since the receiving walls 67 and 67 are formed on the guide walls 65b and 65b, a part of the lower supporting pieces 71b and 71a is overlapped on the rear surface side of the receiving pieces 67 and 67, so that the mounting screw 72 is attached. Even if it comes off, the receiving pieces 67 and 67 can receive the load of the gantry 70. Further, in the state where the mounting screw 72 is inserted into the groove portion of the mounting hole 73, the positions of the retaining bosses 66 and 66 are set so that the retaining bosses 66 and 66 are inserted into the large diameter portion of the mounting hole 73. After the screw 72 is tightened, the support pieces 71 b and 71 a are prevented from rotating with respect to the box body 60. Further, when the retaining bosses 66 and 66 are inserted into the large-diameter portion of the mounting hole 73, the support pieces 71b and 71a are prohibited from rattling even if the mounting screw 72 is somewhat loosened. For example, even if the mounting screw 72 is somewhat loose due to external vibration such as an earthquake, the pedestal 70 can be prevented from moving or dropping with respect to the box 60.
[0020]
By the way, the above-mentioned branch circuit breaker B is operated in the direction of operation of the handle 2b provided on the front side of the container body by connecting the power supply side terminals to the conductive bars 51, 52, 53 arranged in the horizontal direction on the gantry 70. Are arranged in the vertical direction. That is, the upper row branch circuit breaker B in the upper and lower rows is provided with a power supply side terminal (not shown) at the lower end and a load side terminal (not shown) at the upper end. In the branch circuit breaker B, a power supply side terminal (not shown) is provided at the upper end, and a load side terminal is provided at the lower end.
[0021]
The main circuit breaker A will be described below with reference to FIGS.
[0022]
The main circuit breaker A of the present embodiment includes a synthetic resin container 1 formed in a rectangular parallelepiped shape, and a terminal block 30 is formed on the upper end of the container 1. Three power supply side terminals (input terminals) 3, 3, and 3, each formed of a screwed terminal having a terminal screw 31, are juxtaposed in the left-right direction. The terminal block 30 is formed with an insulating wall 35 that insulates between the adjacent power supply side terminals 3 and 3. Further, a terminal mounting portion 10 (see FIG. 2) protrudes continuously and integrally from the right end portion of the upper end portion of the container 1, and load side terminals (output terminals) 4, 4 from the right side surface 1 a of the terminal mounting portion 10. , 4 are arranged in a protruding manner. In short, the container body 1 is provided with three power supply side terminals 3, 3, 3 and three load side terminals 4, 4, 4. Here, the power supply side terminals 3, 3, 3 are associated with the load side terminals 4, 4, 4 in a one-to-one correspondence, and each of the power supply side terminals 3, 3, 3 is a wire conductor (not shown). Are connected to the load side terminals 4, 4, 4 using terminal screws 43, 43, 43, respectively.
[0023]
When the electric wire conductor is screwed and connected to the power supply side terminals 3, 3, 3, the insulation wall 35 as the right side wall of the left side and the central power supply side terminals 3, 3 hits the electric wire conductor by receiving the tightening force. , 35, and the insulating walls 35, 35 may be thickened, but the partition wall 27 (see FIG. 3), which is the right wall of the rightmost power supply side terminal 3, is the same as the leftmost wall of the terminal block 30. The partition wall 27 may be broken from the tip when the wire conductor is tightened and connected. However, in the present embodiment, since the housing portion 15 having an internal cavity is formed on the right side of the partition wall 27, the housing portion 15 can absorb the force when the electric wire conductor is connected, and the partition wall 27 is broken. Fear can be reduced. Further, a part of the storage portion 15 is formed over the inside of the terminal attachment portion 10 described above. In short, since a part of the storage portion 15 protrudes upward from the power supply side terminals 3, 3, 3, a sufficient space can be taken when connecting the wire conductor to the power supply side terminals 3, 3, 3, The operation of connecting the wire conductor to the power supply side terminals 3, 3, 3 becomes easy.
[0024]
In the main body 1 of the main circuit breaker A, three contact portions 26, 26 and 26 (see FIGS. 3 and 5) arranged in parallel in the width direction of the main body 1 (left and right direction in FIG. 1). The trip mechanism 5 is operated so as to forcibly open the contact portions 26, 26, 26 when an abnormal current flows through the trip mechanism 5 and the electric path in which the contact portions 26, 26, 26 are inserted. The tripping devices 6 and 6 are housed, and can be opened and closed by a single handle 2a in which three-pole contact portions 26, 26 and 26 are exposed on the front surface of the container body 1.
[0025]
The main body 1 of the main circuit breaker is composed of a body 11 whose front surface is open and a cover 12 that is covered on the front side of the body 11. The body 11 is formed with an insulating wall 28 (see FIG. 3) that divides the internal space of the body 11 for each pole, and insulates the adjacent contact portions 26 and 26 from each other.
[0026]
  The contact portion 26 is a fixed contact fixed to the tip end portion of an L-shaped contact holding piece 33, 33, 33 extending from the lower end edge of the terminal plate 31, 31, 31 of the power supply side terminals 3, 3, 3. 21, 21, 21 and a movable contact formed in a strip shape from a conductive metal25, 25, 25The movable contacts 22, 22, and 22 are fixed to one end in the longitudinal direction of the contacts and are connected to and separated from the fixed contacts 21, 21, and 21. Each movable contact25, 25, 25Are connected to the load side terminals 4, 4, 4 via the covered electric wires 7, 7, 7, respectively. Therefore, the main circuit breaker A includes a power supply side terminal 3-a fixed contact between the power supply side terminal 3 exposed on the upper front surface of the body 1 and the load side terminal 4 exposed on the right side surface of the body 1. Three electric paths of 21-movable contact 22-covered electric wire 7-load side terminal 4 are formed. Here, the covered electric wires 7, 7, 7 are routed in an L-shaped storage portion 15 formed in the container body 1 along the lower surface and the right side surface of the container body 1. In short, a part of the covered electric wires 7, 7, 7 is disposed in the storage portion 15. Here, the storage portion 15 in the container 1 is separated from the power supply side terminals 3, 3, 3 and the contact portions 26, 26, 26 by the partition wall 27, and a part of the load side terminals 4, 4, 4 is stored. Since it is housed in the part 15, the power supply side terminals 3, 3, 3 and the contact parts 26, 26, 26 can be insulated from the load side terminals 4, 4, 4 by the partition wall 27, and the load side Since the terminals 4, 4, 4 are stored in the storage unit 15 that is different from the space in which the contact units 26, 26, 26 are stored, it is easy to store the load side terminals 4, 4, 4 in the storage unit 15. Become.
[0027]
The handle 2a has an operating portion 8 (see FIG. 5) that undulates through a window hole 29 (see FIG. 5) that opens to the front surface of the vessel 1. The handle 2 a can be raised and lowered between a position where the operation portion 8 is substantially flush with the opening surface of the window hole 29 and a position where the operation portion 8 protrudes from the window hole 29.
[0028]
Here, in the main circuit breaker A of the present embodiment, the trip mechanism 5 is set and the contact portion 26 is in a closed state when the operation portion 8 of the handle 2a is tilted to be substantially flush with the opening surface of the window hole 29. When the handle 2a is raised as shown in FIG. 5 and protruded from the window hole 29 from the closed state, the movable contact 22 opens away from the fixed contact 21. That is, when the operating portion 8 of the handle 2a is raised, the open state is established. Further, when an abnormal current flows through the tripping device 6 in the above-described closed state, the contact portion 26 is opened by the trip mechanism 5. When the operation portion 8 of the handle 2a is raised and lowered, the position of the tip portion of the operation portion 8 is displaced in the vertical position. Therefore, when the body 1 is viewed from the front, the handle 2a is opened and closed. The operation direction can be regarded as the vertical direction. Therefore, each load side terminal 4, 4, 4 is placed in the distribution board so that the arrangement direction of the power source side terminals 3, 3, 3 and the handle 2a is up and down and the operation direction of the handle 2a is along the up and down direction. When disposed, the container body 1 protrudes from the right side surface 1a orthogonal to the longitudinal direction of the conductive bars 51, 52, 53, so that the load side terminals 4, 4, 4 and the conductive bars 51, 52, 53 Are directly connected to each other, so that the conductive bars 51, 52, 53 extend in a direction orthogonal to the opening / closing operation direction of the handle 2a. The operating direction of the handle 2b of the branch circuit breaker B connected to can be aligned, and the appearance in the state of being arranged in the distribution board can be improved.
[0029]
By the way, as for the main circuit breaker A of this embodiment, as above-mentioned, three load side terminals 4, 4, and 4 are integrally projected from the right side surface 1a of the container 1 made from a synthetic resin. Each of the load side terminals 4, 4, 4 is formed in an L shape, and is connected to the connection pieces 41, 41, 41 projecting from the vessel body 1, and orthogonal to the connection pieces 41, 41, 41, on the right side of the vessel body 1. And mounting pieces 42, 42, 42 disposed along the inner surface of the peripheral wall with the surface as the outer surface. Here, the above-mentioned covered electric wires 7, 7, 7 are connected to the attachment pieces 42, 42, 42, respectively. The connection pieces 41, 41, 41 are formed with insertion holes 41a, 41a, 41a through which the terminal screws 43, 43, 43 (see FIG. 1) are inserted, and the terminal screws 43, 43, 43 are used. Can be connected to the conductive bars 51, 52, 53. That is, the terminal screws 43, 43, 43 are inserted into the insertion holes 41 a, 41 a, 41 a with the connection pieces 41, 41, 41 superimposed on the conductive bars 51, 52, 53, and the screws of the conductive bars 51, 52, 53 are inserted. When screwed into a hole (not shown), the load side terminals 4, 4, 4 and the conductive bars 51, 52, 53 can be mechanically and electrically connected. In short, the load side terminals 4, 4, 4 in the main circuit breaker A of the present embodiment have both the functions of the load side terminals 4 ′, 4 ′ 4 ′ and the functions of the feed bars 54, 54, 54 in the conventional configuration. ing. In the present embodiment, the connection pieces 41, 41, 41 constitute connection portions with the conductive bars 51, 52, 53.
[0030]
The connection pieces 41, 41, 41 of the load side terminals 4, 4, 4 are juxtaposed in a direction orthogonal to the juxtaposition direction of the power supply side terminals 3, 3, 3 in front view, and When the front direction of 1 (the left direction in FIG. 4) is the height direction, the adjacent connection pieces 41 are arranged at different height positions in front view, so that the insulation interval between the connection pieces 41 of each pole is Can be long. Here, the connection piece 41 of the load side terminal 4 associated with the power supply side terminal 3 disposed in the center in the direction in which the power supply side terminals 3, 3, 3 are arranged is the load side terminals 4, 4, 4. The power supply side terminals 4 disposed at the center position in the juxtaposed direction and at the first height position in the height direction and disposed on both sides in the juxtaposition direction of the power supply side terminals 4, 4, 4. 4, the connection pieces 41, 41 of the load side terminals 3, 3 respectively associated with the load side terminals 3, 3 are positions on both sides in the direction in which the load side terminals 4, 4, 4 are arranged side by side. Since it is disposed at a second height position lower than the height position, when used in a single-layer three-wire wiring path as in this embodiment, the connection piece 41 is arranged at the first height position. The load side terminal 4 provided as a neutral pole, and two load side ends in which the connection piece 41 is disposed at the second height position By making 4 and 4 voltage poles, the contact pieces 41 of the neutral pole and the voltage pole connection pieces 41 can be prevented from touching, and both sides of the load side terminals 4, 4 and 4 in the parallel arrangement direction can be prevented. The load side terminals 4 and 4 are arranged at the same height position, so that the appearance is improved.
[0031]
By the way, on the first side wall of the body 11 whose outer surface is a part of the right side surface 1a described above in the vessel body 1, through holes 16 and 16 are formed for projecting the connection piece 41 of the load side terminal 4 to the outside. The load side terminal 4 is connected to at least one of the butted surfaces of the second side wall of the cover 12 and the first side wall of the body 11 (the second side wall of the cover 22 in the illustrated example) with the remaining portion of the right side surface of the cover 12 as the outer surface. , 4 and 4 are formed with a cut groove 14 (see FIGS. 7 and 9) for projecting the central load side terminal 4 to the outside. The load terminal 4 at the center is arranged so that the tip of the mounting piece 41 faces rearward (see FIG. 6). Therefore, the load side terminals 4, 4, 4 can be arranged in the container 1 without using a fixing tool such as a screw, and the mounting pieces 41, 41, 41 of the load side terminals 4, 4, 4 are provided. It is possible to prevent the load side terminals 4, 4, 4 from coming out of contact with the inner surface of the first side wall of the body 11, and the same shape for all the load side terminals 4, 4, 4. The load side terminals 4, 4 and 4 can be easily manufactured and managed, and the assembling work can be facilitated to reduce the cost.
[0032]
Here, the container body 1 protrudes forward from the rear wall of the body 11 in the vicinity of each through hole 16, 16 and is attached to the mounting pieces 41 of the load side terminals 4, 4 on both sides between the first side wall. First ribs 18 and 18 are provided so as to project 41 respectively. Further, each through hole 16, 16 is formed from the rear surface of the body 11 to a position where the thickness of the connection pieces 41, 41 is added to the height position of the tip of the first ribs 18, 18. The second rib 19 protrudes rearward from the rear surface of the front wall and sandwiches the mounting piece 42 of the central load side terminal 4 in the juxtaposition direction between the inner surface of the first side wall of the body 11 and projects. In addition, presser pieces 20, 20 that project from the rear surface of the front wall to the tips of the attachment pieces 42, 42 of the load side terminals 4, 4 on both sides are projected.
[0033]
Therefore, at the time of assembly, the load side terminals 4 and 4 on both sides are inserted into the through holes 16 from the inner surface side of the first side wall as shown in FIG. 10 (inserted from the left side to the right side in FIG. 10). 10) until the attachment piece 42 is on the right side of the first rib 18 in FIG. 10, and then the connection piece 41 is shifted so as to approach the bottom wall of the body 11 to connect the connection piece of the central load side terminal 4 If the cover 12 is covered on the body 11 in a state where the cover 41 is placed on the protrusion 13 which is a portion protruding corresponding to the kerf 14 on the first side wall, the load-side terminals 4 and 4 on both sides are the first. The ribs 18, 18 are prevented from moving inward and the cover 12 is prevented from moving forward by the presser pieces 20, 20, and the center load side terminal 4 is the second rib 19. Position to prevent inward movement Since the fit, the work of connecting the conductive bars 51, 52 and 53 in each of the load-side terminals 4,4,4 is facilitated. A guide for positioning the mounting pieces 42, 42 is formed on the inner surface of the first side wall of the body 11 at the peripheral portions of the through holes 16, 16 along the outer peripheral shape of the mounting pieces 42, 42. Walls 17 and 17 are protruded, and a part of each of the attachment pieces 42 and 42 overlaps the opening peripheral edge of the through holes 16 and 16.
[0034]
Thus, in the main circuit breaker A of the present embodiment, the load side terminals 4, 4, 4 are arranged so as to protrude integrally from the body 1 and are used as the electric circuit of the internal unit in the distribution board. Since it has a connecting portion with the conductive bars 51, 52, 53, conventional feed bars 54, 54, 54 are interposed between the load side terminals 4, 4, 4 and the conductive bars 51, 52, 53. Therefore, the number of screw tightening points can be reduced compared to the conventional case, the connection to the conductive bars 51, 52, 53 is facilitated, and the possibility of heat generation due to looseness of the screw tightening points can be reduced. Less.
[0035]
【The invention's effect】
The invention of claim 1 has a plurality of power supply side terminals and a plurality of load side terminals that are exposed on the body, and each of the plurality of power supply terminals interposed between the power supply side terminals and the load side terminals. A contact breaker is housed in the container, and a handle capable of opening and closing the contact is exposed on the front side of the container. Is arranged so as to protrude integrally from the container body, and has a connection portion with a conductive bar used as an electric circuit of the internal unit in the distribution board, and the load side terminal is integrated from the container body. And has a connecting portion with a conductive bar used as an electric circuit of the internal unit in the distribution board, so that a conventional feed bar is interposed between the load side terminal and the conductive bar. So that the connection between the connection portion and the conductive bar can be terminated. Even if it is done by tightening the screw, it is possible to reduce the number of screw tightening points compared to the conventional method, making it easier to connect to the conductive bar, and the possibility of heat generation due to loosening of the screw tightening points. There is an effect that it can be reduced.
[0036]
  In addition,Each load side terminalThe power supplySide terminalAnd said cThe direction of arrangement with theRAs the main circuit breaker is projected from one side surface perpendicular to the longitudinal direction of the conductive bar in the container body when disposed in the distribution board so that the operation direction of the handle is along the vertical direction, When the load side terminal and the conductive bar are directly connected, the conductive bar extends in a direction orthogonal to the opening / closing operation direction of the handle. It can be aligned with the operation direction of the handle of the branch circuit breaker to be connected, and there is an effect that the appearance in the state of being arranged in the distribution board can be improved.
[0037]
  In addition,The container body has a storage part formed along the one side surface and separated from the power supply side terminal and the contact part by a partition wall, and a part of the load side terminal is stored in the storage part. The power supply side terminal and the contact part can be insulated from the load side terminal by a partition wall, and the load side terminal is stored in a storage part separate from the space in which the contact part is stored. The load side terminal can be easily stored.
[0039]
  In addition,Provided with a plurality of covered electric wires that electrically connect the load side terminals and the respective contact portions, respectively, and since each of the covered electric wires is stored in the storage portion, the covered electric wires are disposed in the storage portion, Sheathed wireThe negativeBy connecting to the load side terminal, the said accommodating part can be made small and there exists an effect that reduction in size can be achieved.
[0040]
  In addition,Three sets of the power supply side terminal, the load side terminal, and the contact portion are provided, and the connection portions of the load side terminals are arranged in parallel in a direction orthogonal to the parallel arrangement direction of the power supply side terminals in a front view. In addition, when the front direction of the vessel is the height direction, the adjacent connection portions are arranged at different height positions in front view, so that the insulation interval between the connection portions of each pole is increased. There is an effect that can be.
[0041]
  In addition,The connection portion of the load side terminal associated with the power supply side terminal disposed in the center in the direction in which the power supply side terminals are arranged is a center position in the direction in which the load side terminals are arranged in the height direction. The connection portions of the load side terminals, which are arranged at the first height position and are respectively associated with the power source side terminals arranged on both sides in the direction in which the power source side terminals are arranged, are arranged in parallel with the load side terminals. Since it is disposed at a second height position that is lower than the first height position in the height direction on both sides in the installation direction, when used in a single-layer three-wire wiring path, A load-side terminal having a connection portion disposed at a height position of 1 is a neutral electrode, and two load-side terminals having a connection portion disposed at the second height position are a voltage electrode. The contact portion of the negative electrode and the connection portion of the voltage electrode can be prevented from touching, and the load By both sides of the load-side terminal in the arrangement direction of the terminals are arranged at the same height position, there is an effect that the appearance is improved.
[0042]
  In addition,The load side terminal is formed in an L-shape.The vesselA connecting piece projecting from the body, and a mounting piece disposed along the inner surface of the peripheral wall perpendicular to the connecting piece and having the one side surface of the container as an outer surface, Contact pieces of the load side terminals arranged on both sides in the parallel arrangement direction of the load side terminals on the first side wall having the contact portion and the covered electric wire and having a part of the one side as an outer surface A body having a front opening formed with a through-hole to project, and a load-side terminal that is covered on the front side of the body and disposed in the center in the direction in which the load-side terminals are arranged side by side, It is comprised by the cover pinched between the 2nd side wall used as an outer surface, and the said 1st side wall, and the 1st side wall of the said body has a load side terminal of the both sides in the juxtaposition direction of the said load side terminal A through-hole for projecting each connection piece is formed, in front of the cover. A kerf is formed in at least one of the abutting surfaces of the second side wall and the first side wall of the body for projecting a central load side terminal in the juxtaposition direction of the load side terminals to the outside. The load-side terminal of the mounting piece is arranged so that the front end portion of the mounting piece faces frontward, and the center load-side terminal is arranged so that the front end portion of the mounting piece faces rearward. The load side terminal can be arranged on the container without using a fixing tool such as a screw., Each of the aboveIt is possible to prevent the load-side terminal mounting pieces from coming into contact with the inner surface of the first side wall of the body and pulling out the load-side terminals to the outside., The compoundSame number of load side terminals can be usedThe negativeThere is an effect that the manufacturing and management of the load side terminal become easy and the assembling work becomes easy and the cost can be reduced..
  According to a second aspect of the present invention, in the first aspect of the invention, the power supply side terminal is a screwed terminal in which a wire conductor is connected to a terminal plate using a terminal screw, and the container body includes the plurality of power supplies. Side terminals are juxtaposed in a direction orthogonal to the one side surface on the front side of the vessel body, an insulating wall is formed to insulate between the adjacent power supply side terminals, and the power supply side terminals are on the front side. Since the storage part is formed on the right side of the view and a part of the storage part extends upward from the power supply side terminal, the wire conductor is screwed and connected to the power supply side terminal with the power supply side terminal as the upper side. In this case, it is possible to absorb the force at the time of connection of the electric wire conduction to the power supply side terminal on the rightmost side by the storage portion, and to make the right wall thickness of the power supply side terminal on the rightmost side relatively thin. To prevent the tip of the wall from breaking There is an effect that can be.
[0043]
  Claim3Claimed inventionClaim 1 or Claim 2In the invention, the container body protrudes forward from the rear wall of the body in the vicinity of the through hole, and holds the mounting pieces of the load side terminals on both sides between the first side walls. Each through hole is formed from the rear surface of the body to a height position of the tip end of the first rib at least the thickness of the connecting piece, and the cover is formed on the front wall. A second rib projecting rearward from the rear surface and sandwiching the mounting piece of the central load side terminal in the juxtaposition direction between the inner surface of the first side wall of the body and protruding from the front wall Since pressing pieces extending from the rear surface to the tips of the mounting pieces of the load side terminals on both sides protrude from the rear surface, the load side terminals on both sides are connected to the connection pieces from the inner side of the first side wall during assembly. Insert the connecting piece into the bottom of the body If the cover is covered on the body in a state where the connecting piece of the central load side terminal is placed on the portion corresponding to the cut groove in the first side wall, the load side terminals on both sides The first rib is positioned to prevent inward movement and the cover pressing piece is prevented from moving forward, and the center load side terminal is moved inward by the second rib. Therefore, there is an effect that the work of connecting the conductive bar to each load side terminal becomes easy.
[Brief description of the drawings]
FIG. 1 is a front view of a residential distribution board in which a circuit breaker of the present invention is disposed as a main circuit breaker.
FIG. 2 is a front view of the main circuit breaker in the same as above.
FIG. 3 is a front view of the main circuit circuit breaker with the cover removed.
FIG. 4 is a right side view of the main circuit breaker in the same as above.
FIG. 5 is a sectional view of the main circuit breaker in the same as above.
FIG. 6 is a right side view, partly broken, of the main circuit breaker in the same as above.
FIG. 7 is an exploded perspective view of main parts of the main circuit breaker in the same as above.
FIG. 8 is a cross-sectional view of a main part of the main circuit breaker in the same as above.
FIG. 9 is a cross-sectional view of a main part of the main circuit breaker in the same as above.
FIG. 10 is an explanatory diagram of a method of assembling the main circuit breaker in the same as above.
FIG. 11 is a front view of a conventional residential distribution board.
[Explanation of symbols]
1 body
3 Power supply terminal
4 Load side terminals
10 Terminal mounting part
30 terminal block
41 connection piece
43 Terminal screw
51 Conductive bar
52 Conductive bar
53 Conductive bar
A Main circuit breaker
B branch circuit breaker

Claims

器体に露設された複数の電源側端子および複数の負荷側端子を有し、電源側端子と負荷側端子との間の各電路にそれぞれ介挿された複数の接点部が器体内に収納されるとともに、接点部を開閉操作可能なハンドルが器体の前面側に露設され、分電盤内に配設される回路遮断器であって、前記負荷側端子は、前記器体から一体に突出する形で配置され、且つ、分電盤内の内器の電路として用いる導電バーとの接続部を有し、前記各負荷側端子は、前記電源側端子と前記ハンドルとの配列方向が上下方向となり前記ハンドルの操作方向が当該上下方向に沿うように前記分電盤内に配設したときに前記器体において前記導電バーの長手方向に直交する一側面から突出されてなり、前記器体は、前記一側面に沿って形成され且つ前記電源側端子および前記接点部から隔壁により隔離された収納部を有し、前記負荷側端子の一部が前記収納部に収納されてなり、前記負荷側端子と前記各接点部とをそれぞれ電気的に接続する複数の被覆電線を備え、前記各被覆電線は前記収納部に収納されてなり、前記電源側端子と前記負荷側端子と前記接点部との組が３組設けられ、前記各負荷側端子の各接続部は、正面視において前記電源側端子の並設方向に直交する方向に並設され、且つ、前記器体の前方向を高さ方向とするとき正面視において隣り合う接続部が異なる高さ位置に配設されてなり、前記電源側端子の並設方向において中央に配設された電源側端子に対応付けされた負荷側端子の接続部は、前記負荷側端子の並設方向における中央の位置であって前記高さ方向における第１の高さ位置に配設され、前記電源側端子の並設方向において両側に配設された電源側端子にそれぞれ対応付けされた各負荷側端子の接続部は、前記負荷側端子の並設方向における両側の位置であって前記高さ方向における第１の高さ位置よりも低い第２の高さ位置に配設されてなり、前記負荷側端子は、Ｌ字状の形状に形成され、前記器体から突出する接続部である接続片と、接続片に直交し前記器体の前記一側面を外面とする周壁の内面に沿って配設される取付片とを備え、前記器体は、前記接点部および前記被覆電線が配設され且つ前記一側面の一部を外面とする第１の側壁に前記負荷側端子の並設方向において両側に配設される負荷側端子の接続片を外部に突出させる通孔が形成された前面開口のボディと、ボディの前面側に覆着され且つ前記負荷側端子の並設方向において中央に配設される負荷側端子を前記一側面の残りの部分を外面とする第２の側壁と前記第１の側壁との間で挟持するカバーとで構成され、前記ボディの第１の側壁には、前記負荷側端子の並設方向における両側の負荷側端子の各接続片をそれぞれ突出させるための通孔が形成され、前記カバーの前記第２の側壁と前記ボディの前記第１の側壁との突き合わせ面の少なくとも一方に前記負荷側端子の並設方向における中央の負荷側端子を外部に突出させるための切溝が形成され、前記両側の負荷側端子は、前記取付片の先端部が前方を向くように配設され、前記中央の負荷側端子は、前記取付片の先端部が後方を向くように配設されてなることを特徴とする回路遮断器。Has a plurality of power supply side terminals and a plurality of load side terminals exposed in the body, and a plurality of contact portions inserted in each electrical path between the power supply side terminals and the load side terminals are housed in the body. And a handle that can be operated to open and close the contact portion is exposed on the front side of the device body, and is disposed in the distribution board. The load-side terminal is integrated with the device body. Each of the load side terminals has an arrangement direction of the power source side terminals and the handles. When the handle is disposed in the distribution board so that the operation direction of the handle is along the vertical direction, the container is protruded from one side surface perpendicular to the longitudinal direction of the conductive bar. A body is formed along the one side surface and the power supply side terminal and A plurality of storage portions that are separated from the contact portions by a partition wall, wherein a part of the load side terminals are stored in the storage portion and electrically connect the load side terminals and the contact portions, respectively. Each of the covered wires is housed in the housing portion, and three sets of the power supply side terminal, the load side terminal, and the contact portion are provided, and each connection of each load side terminal is provided. Are arranged in a direction orthogonal to the direction in which the power supply side terminals are arranged in front view, and when the front direction of the container is the height direction, adjacent connection parts in the front view have different height positions. The connecting portion of the load-side terminal corresponding to the power-side terminal disposed in the center in the direction in which the power-side terminals are arranged is positioned at the center in the direction in which the load-side terminals are arranged. And arranged at a first height position in the height direction. The connection portions of the load side terminals respectively associated with the power supply side terminals arranged on both sides in the direction in which the power supply side terminals are arranged are positions on both sides in the direction in which the load side terminals are arranged. The connecting portion is disposed at a second height position lower than the first height position in the height direction, and the load side terminal is formed in an L-shape and protrudes from the vessel body And a mounting piece disposed along the inner surface of the peripheral wall orthogonal to the connection piece and having the one side surface of the device body as the outer surface. The device body includes the contact portion and the covered electric wire. And a through hole is formed on the first side wall having a part of the one side surface as an outer surface, and projecting the connection pieces of the load side terminals arranged on both sides in the parallel arrangement direction of the load side terminals. A body having a front opening formed on the front side of the body and the load side end A load side terminal disposed in the center in the direction in which the children are arranged, the second side wall having the remaining portion of the one side surface as an outer surface, and a cover sandwiched between the first side wall, On the first side wall of the body, through holes for projecting the connection pieces of the load side terminals on both sides in the direction in which the load side terminals are arranged side by side are formed, and the second side wall of the cover and the body A cut groove is formed on at least one of the abutting surfaces with the first side wall of the first side wall to project the central load side terminal in the direction in which the load side terminals are juxtaposed, and the load side terminals on both sides are A circuit breaker characterized in that the tip of the mounting piece is disposed so as to face forward, and the center load side terminal is disposed so that the tip of the mounting piece faces rearward .

前記電源側端子は、端子ねじを用いて電線導体が端子板に接続されるねじ付き端子であって、前記器体は、前記複数の電源側端子が前記器体の前面側において前記一側面に直交する方向に並設されるとともに、隣り合う前記電源側端子間を絶縁する絶縁壁が形成され、且つ、前記電源側端子を上側として正面視右側に前記収納部を形成するとともに前記収納部の一部を前記電源側端子よりも上方へ延出してなることを特徴とする請求項１記載の回路遮断器。 The power supply side terminal is a screwed terminal in which a wire conductor is connected to a terminal plate using a terminal screw, and the instrument body has the plurality of power supply side terminals on the one side surface on the front side of the instrument body. In parallel to the orthogonal direction, an insulating wall that insulates between the adjacent power supply side terminals is formed, and the storage part is formed on the right side of the front view with the power supply side terminal as the upper side, and the storage part The circuit breaker according to claim 1 , wherein a part of the circuit breaker extends upward from the power supply side terminal .

前記器体は、前記通孔の近傍において前記ボディの後壁から前方へ突出し前記第１の側壁との間に前記両側の各負荷側端子の取付片をそれぞれ挟持する第１のリブが突設され、前記各通孔は、前記ボディの後面から第１のリブの先端の高さ位置に少なくとも前記接続片の厚さを加えた位置までにわたって形成され、前記カバーは、前壁の後面から後方へ突出して前記ボディの前記第１の側壁の内面との間に前記並設方向における中央の負荷側端子の取付片を挟持する第２のリブが突設されるとともに、前壁の後面から前記両側の負荷側端子それぞれの取付片の先端まで延出する押え片が突設されてなることを特徴とする請求項１または請求項２記載の回路遮断器。 The container has a first rib projecting forward from the rear wall of the body in the vicinity of the through-hole and sandwiching the mounting pieces of the load-side terminals on both sides between the first side wall and the first rib. Each of the through holes is formed from the rear surface of the body to the height position of the tip end of the first rib and at least the thickness of the connecting piece, and the cover is rearward from the rear surface of the front wall. And a second rib projecting from the inner surface of the first side wall of the body to sandwich the mounting piece of the central load side terminal in the juxtaposed direction, and projecting from the rear surface of the front wall 3. The circuit breaker according to claim 1 , further comprising a pressing piece that extends to the tip of each of the mounting pieces of the load side terminals on both sides .