JP2004064869A

JP2004064869A - Distribution board

Info

Publication number: JP2004064869A
Application number: JP2002219002A
Authority: JP
Inventors: Takeshi Yano; 矢野　剛; Yoshizo Kanehira; 金平　芳三
Original assignee: Matsushita Electric Works Ltd
Current assignee: Panasonic Electric Works Co Ltd
Priority date: 2002-07-26
Filing date: 2002-07-26
Publication date: 2004-02-26
Anticipated expiration: 2022-07-26
Also published as: JP4182701B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a distribution board where the drawing-around work of a cable becomes easier. <P>SOLUTION: A mounting plate 30 where a master breaker 6 and a plurality of branch breakers 7 are attached to the front side is arranged in the main body 10 of a box. A conductive bar 100 connected via a transmission line 97 on power side to the output terminal on power side of the master breaker 6 is connected to the input terminal of the branch breaker 7. A terminal block 80 has a terminal plate 81b to which the output terminal on ground side of the master breaker 6, is connected via a transmission line 96 on ground side, and is arranged within the main body 10 of the box. The transmission line 96 on ground side is arranged in such form that it abuts on the inner bottom of the fitting-in groove of each breaker 6 and 7, and a cut 38 leads to an opening window 31a made in a main piece 31, and is made at the step of the mounting plate 30. On the subject of the step 32, the transmission line 96 on ground side can be passed through the cut 38. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、ＤＩＮ規格のブレーカを収納した分電盤に関するものである。
【０００２】
【従来の技術】
この種の従来の分電盤として、特開２００１−２８８１０号公報に開示されたものが存在する。この公報に開示された分電盤は、図１５および図１６に示すように、箱本体１０の左右両側の側板１２，１２に両端部１４３，１４３がそれぞれ取り付けられるとともに中央部１４１が背板１１側に凹設された取付板１４０と、この取付板１４０の前面側に取着されたＤＩＮレール４０と、ＤＩＮレール４０に取り付けられた主幹ブレーカ６と、主幹ブレーカ６と横１列に並ぶようにＤＩＮレール４０に取り付けられる複数の分岐ブレーカ７とを備えている。
【０００３】
ＤＩＮレール４０は、断面コ字状であって両脚片の各先端縁から互いに離れる向きに張出片４１，４１が延設されている。これに対し、ＤＩＮレール４０に取り付けられる分岐ブレーカ７は、器体の後面にＤＩＮレール４０の一部が嵌入可能な嵌入溝部７２が形成されており、嵌入溝部７２の一方の内側面にはＤＩＮレール４０の一方の張出片４１を係止する係止溝７３が形成され、嵌入溝部７２の他方の内側面には嵌入溝部７２内に進退自在に突出してＤＩＮレール４０の他方の張出片４１を係止するスライダ（図示せず）が配設されており、ＤＩＮレール４０に取り付けることができるようになっている。ところで、主幹ブレーカ６もＤＩＮレール４０に取り付ける構造として分岐ブレーカ７と同様の嵌入溝部、係止溝、スライダが設けられている。
【０００４】
上述の箱本体１０内に配設される各分岐ブレーカ７は、それぞれの入力端子７９ａに、主幹ブレーカ６の電源側出力端子６９ｄから取付板１４０と箱本体１０の背板１１との間に挿通される電源側送り線９７を介して接続された導電バー１００’が接続されている。また、主幹ブレーカ６の接地側出力端子６９ａには、取付板１４０と箱本体１０の背板１１との間に挿通される接地側送り線９６が接続されており、箱本体１０に取着された端子台８０’に設けられた端子板８１ｂに接地側送り線９６が接続されており、負荷に電気を供給するには、負荷を分岐ブレーカ７の出力端子７９ｂに接続するとともに端子板８１ａに接続することで行うようになっている。なお、導電バー１００’はバー本体１０１’から延設された分岐接続片１０２’が分岐ブレーカ７の入力端子７９ａに接続されている。
【０００５】
【発明が解決しようとする課題】
ところで、上述した分電盤にあっては、導電バー１００’に接続される電源側送り線９７と端子板８１ｂに接続される接地側送り線９６とを取付板１４０と箱本体１０の背板１１との間に挿通させているので、分岐ブレーカ７の出力端子７９ｂに接続される分岐用の電線を取付板１４０と箱本体１０の背板１１との間に挿通させて分岐ブレーカ７の入力端子７９ａ側に引き回す際、各送り線９６，９７が邪魔となり、分岐用の電線を引き回す作業が困難であった。
【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、電線の引き回し作業が容易となる分電盤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、背板および背板の周縁から立設された側板とで構成され前面開口した箱本体と、箱本体の内部に収納される主幹ブレーカと、主幹ブレーカに並設された複数の分岐ブレーカと、分岐ブレーカの並設方向に延長される形で箱本体の内部に配設され主幹ブレーカの電源側の出力端子と分岐ブレーカの入力端子とを電気的に接続する導電バーと、主幹ブレーカおよび各分岐ブレーカが前面側に取り付けられる取付板と、前記主幹ブレーカの接地側出力端子に接地側送り配線を介して電気的に接続される端子板を有し箱本体に取着された端子台とを備え、主幹ブレーカおよび各分岐ブレーカは、ＤＩＮレールが嵌入可能な嵌入溝部が後面に形成され且つ嵌入溝部内に臨む位置と臨まない位置との間で進退自在なスライダがそれぞれの器体の長手方向の一端面側に有し、取付板は、前記並設方向に延出する形で切り起こし形成され嵌入溝部に臨んでスライダに係止される張出片を中央部に有し且つ主幹ブレーカおよび分岐ブレーカを前記中央部に取着した状態で嵌入溝部の高さ位置と略同一高さ位置まで切り欠いて張出片の切り起こし孔に連通する切欠部が両端部に形成され、主幹ブレーカおよび分岐ブレーカの嵌入溝部から前記両端部の切欠部にかけて前記接地側送り線を挿通させてなることを特徴とするものであり、取付板の張出片の切り起こし孔から両端部の切欠部にかけて主幹ブレーカの接地側出力端子に接続された接地側送り線を挿通させて端子板に接続することができ、分岐ブレーカの出力端子に接続される分岐用の電線を引き回す際、接地側送り線が邪魔にならず、もって分岐用の電線を引き回す作業が容易となる。
【０００８】
請求項２の発明は、請求項１の発明において、前記接地側送り線の外径寸法を、前記取付板に前記主幹ブレーカおよび前記分岐ブレーカを取着した状態で前記取付板の前面から前記嵌入溝部の内底面の高さ位置までの間に収まる寸法としたので、前記接地側送り線を前記嵌入溝部の内底面に当接する形で配設すれば、前記接地側送り線が前記取付板の後面側に突出することがなくなり、もって前記各分岐ブレーカに接続される分岐用の電線を前記取付板と前記箱本体の前記背板との間に挿通させる形で前記分岐ブレーカの入力端子側に引き回すときに前記接地側送り線が邪魔にならず、もって分岐用の電線を引き回す作業が容易となる。
【０００９】
請求項３の発明は、請求項１の発明において、前記取付板の両端部は、前記中央部との連設部分と前記両端部を取着する一対の側板の先端との間であって前記箱本体の前面側から見た間隔を前記接地側送り線の外径寸法よりも大きくしてあるので、前記取付板の両端部と該両端部を取着する一対の側板との間であって、前記接地側送り線を引き回した状態で、前記取付板の両端部を前記箱本体の前面側から前記一対の側板に着脱する際、前記一対の側板に接地側送り線が干渉することなく前記取付板を着脱させることができ、もって前記箱本体に前記取付板を着脱する作業が容易となる。
【００１０】
請求項４の発明は、請求項３の発明において、前記取付板の両端部は、前記箱本体の一対の側板の前端に取着される耳片および耳片から背板へ向かって延出して中央部に連設される折曲片にて形成され、前記折曲片は、前記中央部との連設部分から耳片との連設部分にかけて傾斜した状態に折曲形成されているので、折曲片を直角に折曲する場合に比べて耳片を小さくすることができ、前記取付板の形成時に材料取りが良くなり、低コスト化を図れる。
【００１１】
【発明の実施の形態】
以下、本実施形態の分電盤を図１ないし図１４を参照しながら説明する。
【００１２】
本実施形態の分電盤は、図２ないし図４に示すように、１つの主幹ブレーカ６と複数の分岐ブレーカ７とを内器として箱体１の中に配置したものであって、主幹ブレーカ６および複数の分岐ブレーカ７は横１列に並設されている。箱体１は、前面開口した金属製の箱本体１０と、箱本体１０の開口を塞ぐ形で箱本体１０に結合される蓋体２０とで構成される。なお、箱本体１０は壁面などの造営面に埋込配置される。
【００１３】
箱本体１０は、矩形状の背板１１および背板１１の周縁から前方に立設された側板１２とで構成され、左右両側の側板１２の前端縁から支持片１３，１３が互いに近づく向きに延設されている。ここに、各支持片１３にはねじ孔１４，１４が形成されており、左右の支持片１３，１３間には、主幹ブレーカ６および複数の分岐ブレーカ７を取り付ける取付板３０が架設されている。
【００１４】
取付板３０は、板金（鉄板）により形成されたものであり、外形が細長の矩形状に形成された主片３１の左右両端部に段差部３２を介して耳片３３，３３が延設されている。各耳片３３，３３には、取付ねじ５１の頭部の直径よりも大きい丸孔状の大径部の一部に取付ねじ５１の頭部の直径よりも幅狭の溝部が連続する鍵穴状の取付孔３４，３４がそれぞれ形成されている。したがって、各支持片１３，１３のねじ孔１４，１４に取付ねじ５１，５１を緩く螺入した状態で、取付ねじ５１，５１の頭部を取付孔３４，３４の大径部に通し、取付ねじ５１，５１の頭部を溝部に対する部位までスライドさせた後に取付ねじ５１，５１を締め付けることにより箱本体１０に取付板３０を容易に取り付けることができる。
【００１５】
また、図５における左側の耳片３３は取付孔３４の下側に止めねじ孔３５が形成され、右側の連結片３３は取付孔３４の上側に止めねじ孔３５が形成されており、止めねじ孔３５，３５に螺合する固定ねじ５２，５２を用いて蓋体２０が取り付けられている。
【００１６】
一方、蓋体２０は、上下方向および左右方向それぞれの外形寸法が箱本体１０より大きく設定され取付板３０に固定ねじ５２，５２を用いて結合されるカバー２１と、後述の扉２２とで構成されている。ここにおいて、カバー２１の前面の中央部には周部よりも後面側へ凹んだ凹部２３が形成されており、凹部２３の中央部にはさらに後面側へ凹んだ凹部２４が形成されており、凹部２４の奥面に、主幹ブレーカ６や分岐ブレーカ７などの内器の一部を露出させる矩形状の窓孔２５が形成されている。なお、カバー２１は、上述の固定ねじ５２，５２が挿通される止め孔２６，２６が凹部２３の奥面の左右両端部に形成されており、箱本体１０の各支持片１３，１３には、固定ねじ５２，５２の干渉を避けるための切欠部１３ａが形成されている。
【００１７】
窓孔２５は、取付板３０に取り付けられた主幹ブレーカ６および複数の分岐ブレーカ７それぞれのハンドル６ａ，７ａを一括して露出させることができるように開口寸法が設定されている。上述の扉２２は、凹部２３を覆う位置と凹部２３を開放する位置との間で開閉自在となるようにカバー２１に軸着されている。なお、扉２２は当該扉２２を閉じた状態で左右両側面の上端部となる部分に軸部が設けられている。
【００１８】
扉２２が凹部２３を覆う位置においては扉２２の前面とカバー２１の前面とがほぼ面一になる。一方、扉２２が凹部２３を開放する位置においては、各ブレーカ６，７のハンドル６ａ，７ａを操作することができる。なお、扉２２を閉じたい状態で簡単に開かないように、扉２２において軸部から遠い一端部の後面にはロック突起２７（図４参照）が突設され、カバー２１にはロック突起２７を受けるキャッチ２８（図４参照）が設けられている。この種のキャッチ２８は周知の機構であって、扉２２の下部を押し込むことでロック突起２７が挿入されるとロック突起２７が抜けないようにロックし、扉２２の下部を押し込むことでロック突起２７をキャッチ２８に押し込んで離すとロック突起２７のロック状態が解除されるように構成されている。
【００１９】
ところで、取付板３０に取り付けられている分岐ブレーカ７は１Ｐ型のブレーカであって、分岐ブレーカ７の器体７０の寸法は、例えば電灯分電盤協約形配線遮断器の単位寸法の大きさに形成されている。一方、主幹ブレーカ６の器体６０の寸法は、上記単位寸法の大きさの２倍の大きさ（２個分の大きさ）に形成されている。すなわち、主幹ブレーカ６の器体６０は１Ｐ型の分岐ブレーカ７の器体７０を幅方向に２個並べた大きさに形成されている。なお、後述の分岐ブレーカ７’（図１３および図１４参照）は２Ｐ型のブレーカであって、分岐ブレーカ７’の器体７０’の寸法は、主幹ブレーカ６の器体６０と同様に、上記単位寸法の大きさの２倍の大きさ（２個分の大きさ）に形成されている。
【００２０】
分岐ブレーカ７は、器体７０の後面に、従来例にて説明したＤＩＮレール４０に取り付けるための嵌入溝部７２が形成されており、嵌入溝部７２の一方の内側面にはＤＩＮレール４０（図１５および図１６参照）の一方の張出片４１を係止可能な係止溝７３が形成され、他方の内側面側には当該内側面から進退自在に突出してＤＩＮレール４０の他方の張出片４１を係止可能なスライダ７４が保持されている。また、主幹ブレーカ６，分岐ブレーカ７’にも同様の嵌入溝部、係止溝が形成され、スライダが保持されている。なお、以上説明した各ブレーカ６，７，７’の構造は周知なので詳細な説明は省略する。
【００２１】
一方、取付板３０の主片３１は、断面逆Ｌ字状の張出片３６が前面側に切り起こされた形で形成されており、張出片３６が切り起こされた部位は矩形状の開口窓３１ａとなっている。また、取付板３０は、各ブレーカ６，７，７’の入力側の端面に形成された引掛孔７７（図８および図１３参照）に挿入可能な多数の逆Ｌ字状の引掛爪３７（図１、図８および図１３参照）が主片３１の上端縁から延設されている。ここに、引掛爪３７は、主片３１の長手方向において等ピッチで形成されている。また、主片３１の短手方向において引掛爪３７と張出片３６との間の距離は、図８に示すように、引掛爪３７が引掛孔７７に挿入係止された状態で張出片３７が嵌入溝部７２に臨んでスライダ７４により係止されるように設定してある。また、取付板３０の下部前面側にはブレーカ（主幹ブレーカ６、分岐ブレーカ７，７’）の出力側の端面が当接する複数の弾性抜止部材１３０ａが左右方向に連結された合成樹脂製の弾性抜止ブロック１３０が配設されている。
【００２２】
ここにおいて、弾性抜止部材１３０ａは、例えば図１および図７および図８に示すように、分岐ブレーカ７のスライダ７４の両側で分岐ブレーカ７の出力側の端面（図７における下面）が当接する一対の当接片１３１，１３１と、当該一対の当接片１３１，１３１を連結してスライダ７４の後面に対向する連結片１３２とを有している。したがって、一対の当接片１３１，１３１が分岐ブレーカ７の幅方向においてスライダ７４の両側で分岐ブレーカ７の出力側の端面に当接するので、分岐ブレーカ７のがつつきを少なくでき、分岐ブレーカ７を取付板３０に強固に取着することができるのである。なお、連結片１３２には、スライダ７４が張出片３６を係止している状態（図７および図８参照）から解除する方向（図７であれば下向き）に図９および図１０に示すように分岐ブレーカ７をずらした際に、スライダ７４の後面が当接して分岐ブレーカ７の長手方向においてスライダ７４を保持している側の端部を取付板３０の主片３１から離すように傾斜した解除面１３３が形成されているので、分岐ブレーカ７を取付板３０から取り外す作業が容易となる。また、解除面１３３は、分岐ブレーカ７の端面から離れるほど取付板３０の表面からのの高さ位置が徐々に高くなるように傾斜しているので、スライダ７４を張出片３６から解除する方向に分岐ブレーカ７を移動させる際に、傾斜面１３３に徐々に乗り上げることとなり、スライダ７４を張出片３６から解除する方向に移動させる力を弱くすることができ、分岐ブレーカ７を取付板３０から取り外す作業がさらに容易となる。
【００２３】
したがって、引掛爪３７を分岐ブレーカ７の引掛孔７７に係止するとともに、スライダ７４によって張出片３６を係止することによって、分岐ブレーカ７を取付板３０に容易に取り付けることができ、また、スライダ７４を張出片３６から解除する方向に分岐ブレーカ７を移動させることによって、分岐ブレーカ７を取付板３０から容易に取り外すことができる。なお、上述の主幹ブレーカ６および分岐ブレーカ７’についても同様にして取付板３０に取り付けたり、取付板３０から取り外したりすることができる。
【００２４】
ところで、各分岐ブレーカ７の各入力端子７９ａは、主幹ブレーカ６の電源側出力端子６９ｄに電源側送り線９７を介して電気的に接続された導電バー１００に接続される。
【００２５】
箱本体１０の上側の側板１２および下側の側板１２には切除可能な複数の円形状のノックアウト部１６が左右方向に並設され、ノックアウト部１６を適宜切除して形成した配線孔に電線を挿通できるようになっており、主幹ブレーカ６の電源側入力端子６９ａには箱本体１０の外部から上記配線孔を通して箱本体１０内に導入された電源線が接続され、接地側入力端子６９ｂには、同様にして箱本体１０内に導入された接地線が接続される。ここにおいて、主幹ブレーカ６の接地側入力端子６９ａは、周知のように、器体６０内に収納された断面ロ字形の端子金具（図示せず）と、端子金具の上片に螺挿した引締ねじ６６（図５参照）と、引締ねじ６６の下端に当接する端子板（図示せず）とを備えており、器体６０の前面に形成したねじ操作孔６８（図１参照）にドライバなどの先端部を挿入して引締ねじ６６を回転させると、端子金具の下片と端子板との距離を変えることができる。
【００２６】
したがって、器体６０の周壁に貫設された接続用孔６５（図１参照）を通して電線やブスバーのような配線部材を端子金具と端子板との間に挿入し、引締ねじ６６を回転させて端子金具の下片を端子板に近づけることで配線部材を端子金具と端子板との間に挟持し、配線部材との電気的接続が行えるのである。なお、主幹ブレーカ６の電源側入力端子６９ｂ、接地側出力端子６９ｃ、電源側出力端子６９ｄの構造は接地側入力端子６９ａと同様である。また、分岐ブレーカ７の入力端子７９ａおよび出力端子７９ｂの構造も主幹ブレーカ６の電源側入力端子６９ｂの構造と同様であって、器体７０の周壁に貫設された接続用孔７５（図１参照）を通して電線やブスバーのような配線部材を端子金具と端子板との間に挿入し、引締ねじ７６を回転させて端子金具の下片を端子板に近づけることで配線部材を端子金具と端子板との間に挟持し、配線部材との電気的接続が行えるようになっている。
【００２７】
導電バー１００は、帯板状のバー本体１０１と、バー本体１０１の短手方向（幅方向）の一側縁から複数のＬ字状の分岐接続片１０２が突設されている。ここに、分岐接続片１０２は、バー本体１０１の短手方向に沿って突設された接続片１０２ａと、接続片１０２ａの先端縁から接続片１０２ａに対して直交方向に延長された挿入端子片１０２ｂとが連続一体に形成されている。ここに、挿入端子片１０２ｂは取付板３０の主片３１に対向するように接続片１０２ａに対して直交方向に延長されている。また、分岐接続片１０２には、バー本体１０１から当該分岐接続片１０２を切断可能とするための切断溝１０３がバー本体１０１近傍に設けられている。切断溝１０３については後述する。なお、本実施形態では、分岐接続片１０２がバー本体１０１の幅方向の一端部から延設されて分岐ブレーカ７の入力端子に接続される分岐接続部を構成し、切断溝１０３が切断補助部を構成している。
【００２８】
また、導電バー１００は、図１および図６に示すように、バー本体１０１の長手方向の一端部において上記一側縁から挿入端子片１０２ｂとは反対向きに端子片１０４が延設され、端子片１０４には端子ねじ１０７が挿通される端子孔１０５が形成されている。ここに、端子ねじ１０７は中継端子台９０の凹所８１の底部に設けたナット１０８に螺合し、これによって電源側送り線９７と導電バー１００とを電気的に接続することができる。なお、中継端子台９０は図５における左側と下側とが開放されている。また、接続台９０には、端子ねじ１０７の前面側を開放する位置（図６参照）と端子ねじ１０７の前面側を覆う位置（図１参照）との間で開閉自在な扉９３が設けられている。
【００２９】
ところで、箱本体１０の内部において上側の側板１２の近傍には、各ブレーカ６，７，７’などの内器や外部からの電線を接続するための端子台８０が配設されている。
【００３０】
端子台８０は絶縁性を有する合成樹脂製の基台８０ａに導電性材料からなる細長の２個の端子板（以下、電線接続部と称す）８１ａ，８１ｂが長手方向を左右方向として横並びに配設されている。電線接続部８１ａ，８１ｂの前面には、端子ねじ８５が螺合する多数のねじ穴（図示せず）が長手方向（左右方向）に並設されており、電線接続部８１ａ，８１ｂの下面には各ねじ穴と一体一で連通する多数の配線挿入孔（図示せず）が形成されている。しかして、端子台８０においては、配線挿入孔に電線などの配線部材を挿入して当該配線挿入孔に対応したねじ穴の端子ねじ８５を締め付けることにより、電線接続部８１ａ，８１ｂに配線部材が接続される。なお、端子台８０は、箱本体１０の左右の支持片１３，１３の上端部間に連結ねじ５３，５３（図５参照）を用いて架設され中央部が両端部に比べて凹んだ取付金具１２０の中央部の前面側に配設される。なお、一方の電線接続部８１ａは、固定ねじ８６を用いて基台８０ａとともに取付金具１２０に取り付けられ、取付金具１２０を介して箱本体１０に接地される。また、他方の電線接続部８１ｂは箱本体１０と電気的に絶縁されている。ここに、主幹ブレーカ６の電源側入力端子６９ｂには箱本体１０内に外部から導入された電源線（図示せず）が接続され、接地側出力端子６９ｃは、接地側送り線９６を介して電線接続部７１ｂに接続される。また、主幹ブレーカ６の電源側出力端子６９ｄは電源側送り線９７を介して導電バー１００に接続されており、導電バー１００は分岐ブレーカ７の入力端子（電源側端子）７９ａに接続されている。そして、各分岐ブレーカ７の出力端子（負荷側端子）７９ｂと、電線接続部８１ｂの各端子ねじ８５との間に負荷が接続される。また、負荷からのアース線は箱本体１０に接地された電線接続部８１ａに接続される。
【００３１】
なお、接地側送り線９６は、各ブレーカ６，７の後面側の嵌入溝部の内側を通して図５の左側から右側へ引き回してある。ここに、図１１に示すように、接地側送り線９６の外径Ｈ１は、取付板３０の主片３１に主幹ブレーカ６および分岐ブレーカ７を取り付けた状態で主片３１の前面から嵌入溝部の内底面までの寸法Ｈ２よりも小さくしてある。また、取付板３０の主片３１の両端部から延設された段差部３２には、主片３１に形成された開口窓３１ａに連通する切欠部３８（図１参照）が形成してあり、この切欠部３８は主片３１に各ブレーカ６，７を取り付けた状態で各ブレーカ６，７の嵌入溝部の内底面と同じ高さ位置まで切り欠いてあるので、段差部３２にいては切欠部３８に接地側送り線９６を通すことができる。したがって、接地側送り線９６を各ブレーカ６，７の嵌入溝部の内底面に当接する形で配設すれば、接地側送り線９６が取付板３０の主片３１の後面側に露出することがなくなり、各分岐ブレーカ７の各出力端子７９ｂに接続される分岐用の電線を主片３１の後面と箱本体１０の背板１１との間に挿通させる形で分岐ブレーカ７の入力端子７９ａ側に引き回すときに接地側送り線９６が邪魔にならず、もって分岐用の電線を引き回す作業が容易となる。
【００３２】
ところで、本実施形態では、分岐接続部たる分岐接続片１０２を各分岐ブレーカ７の入力端子７９ａに接続した状態（分岐接続片１０２を接続用孔７５に挿入して引締ねじ７６を締め付けた状態）で分岐接続片１０２の露出した部分を覆う絶縁カバー１１０が導電バー１００のバー本体１０１に取着されている。ここにおいて、絶縁カバー１１０は、複数個の分岐接続片１０２を一括して覆うことができるように左右方向の寸法が設定してあり、本実施形態では、１４個の分岐接続片１０２を３個の絶縁カバー１１０で覆っている。
【００３３】
ここにおいて、分岐接続片１０２とバー本体１０１との繋がっている部分には、上述の切断補助部たる切断溝１０３（図１および図８参照）が形成されているので、導電バー１００のうち使用しない分岐接続片１０２を切断溝１０３の位置で容易に切断することができる。さらに、絶縁カバー１１０には、分岐接続片１０２に沿って切断溝１０３と略同一位置まで延びる切溝１１３が形成されているので、絶縁カバー１１０のうち切断した分岐接続片１０２に対応する部分を切溝１０３の位置で簡単に切断することができる。しかして、取付板３０から１Ｐ型の分岐ブレーカ７のいくつかを取り外して図１３および図１４に示すような２Ｐ型の分岐ブレーカ７’を取り付ける際には、同各図のように２Ｐ型の分岐ブレーカ７’の２つの入力端子のうち導電バー１００を接続しない方の入力端子に対応する分岐接続片１０２を切断するとともに絶縁カバー１１０において当該分岐接続片１０２に対応する部分を切断して挿通溝１１６を形成すれば、導電バー１１０を接続しない方の入力端子に例えば電線９８等の他の導体を絶縁カバー１１０に形成された挿通溝１１６を通して簡単に接続することができる。要するに、本実施形態の分電盤では、１Ｐ型の分岐ブレーカ７から２Ｐ型の分岐ブレーカ７’への変更作業が容易となる。
【００３４】
また、導電バー１００は、上述のように、バー本体１０１の幅方向の一端部から分岐接続片１０２が延設されているが、絶縁カバー１１０は、バー本体１０１の幅方向の他端部を挟持する形で取着される断面コ字状の取付部１１１と、取付部１１１から回転自在に連設されバー本体１０１の上記一端部側の端面に係止されるカバー本体１１２とを有するので、図１１に示すように絶縁カバー１１０の取付部１１１をバー本体１０１に取着してから、カバー本体１１２を同図中の半時計回りに回動させることで、図１２に示すようにカバー本体１１２を導電バー１００の表面に被せて導電バー１００のバー本体１０１に係止することができる。しかして、導電バー１００を分岐ブレーカ７に接続した状態で絶縁カバー１１０を後付けすることができ、絶縁カバー１１０を導電バー１００に取着する作業が容易となる。なお、カバー本体１１２には、導電バー１００のバー本体１０１において隣り合う分岐接続片１０２の間の部位に係止される係合突起１１５が連続一体に突設されるとともに、バー本体１０１に当接する当てリブ１１４が連続一体に突設されている。
【００３５】
また、本実施形態の分電盤では、導電バー１００をバー本体１０１の幅方向が取付板３０の主片３１の前面に直交するように配設されているので、箱本体１０の前面側から見て分岐ブレーカ７からの導電バー１００の突出量が少なくなり、箱本体１０の小型化を図れる。すなわち、図５における上下方向に関して箱本体１０の外形寸法を図１５に示した従来構成に比べて小さくすることができる。
【００３６】
以上説明した本実施形態の分電盤では、主幹ブレーカ６および分岐ブレーカ７を取付板３０の主片３１に取着した状態で嵌入溝部７２の高さ位置と略同一高さ位置まで切り欠いて張出片３６の切り起こし孔である開口窓３１ａに連通する切欠部３８，３８が段差部３２，３２に形成され、主幹ブレーカ６および分岐ブレーカ７の嵌入溝部から切欠部３８にかけて接地側送り線９６を挿通させているので、取付板３０の開口窓３１ａから切欠部３８，３８にかけて主幹ブレーカ６の接地側出力端子６９ｃに接続された接地側送り線９６を挿通させて端子板に接続することができ、分岐ブレーカ７の出力端子７９ｂに接続される分岐用の電線を引き回す際、接地側送り線９６が邪魔にならず、分岐用の電線を引き回す作業が容易となる。また、接地側送り線９６の外径寸法を、取付板３０に主幹ブレーカ６および分岐ブレーカ７を取着した状態で取付板３０の前面から嵌入溝部の内底面の高さ位置までの間に収まる寸法としたので、接地側送り線９６を嵌入溝部の内底面に当接する形で配設すれば、接地側送り線９６が取付板３０の後面側に突出することがなくなり、もって各分岐ブレーカ７に接続される分岐用の電線を取付板３０と箱本体１０の背板１１との間に挿通させる形で分岐ブレーカ７の入力端子７９ａ側に引き回すときに接地側送り線９６が邪魔にならず、分岐用の電線を引き回す作業が容易となる。
【００３７】
ところで、本実施形態では、取付板３０の主片３１が取付板３０の中央部を構成し、主片３１の両側の段差部３２と耳片３３とで取付板３０の両端部を構成しており、取付板３０の中央部との連設部分と取付板３０の両端部を取着する左右の側板１２，１２の先端との間であって箱本体１０の前面側から見た間隔を接地側送り線９６の外径寸法よりも大きくしてある（図５参照）ので、取付板３０の両端部と該両端部を取着する一対の側板１２，１２との間であって、接地側送り線９６を引き回した状態で、取付板３０の両端部を箱本体１０の前面側から一対の側板１２，１２に着脱する際、一対の側板１２，１２に接地側送り線９６が干渉することなく取付板３０を着脱させることができ、箱本体１０に取付板３０を着脱する作業が容易となる。また、本実施形態では、取付板３０の段差部３２が耳片３３から背板１１へ向かって延出して中央部に連設される折曲片を構成しており、折曲片は、中央部との連設部分から耳片３３との連設部分にかけて傾斜した状態に折曲形成されている（図３参照）ので、折曲片を直角に折曲する場合に比べて耳片３３を小さくすることができ、取付板３０の形成時に材料取りが良くなり、低コスト化を図れるという利点がある。
【００３８】
【発明の効果】
請求項１の発明は、背板および背板の周縁から立設された側板とで構成され前面開口した箱本体と、箱本体の内部に収納される主幹ブレーカと、主幹ブレーカに並設された複数の分岐ブレーカと、分岐ブレーカの並設方向に延長される形で箱本体の内部に配設され主幹ブレーカの電源側の出力端子と分岐ブレーカの入力端子とを電気的に接続する導電バーと、主幹ブレーカおよび各分岐ブレーカが前面側に取り付けられる取付板と、前記主幹ブレーカの接地側出力端子に接地側送り配線を介して電気的に接続される端子板を有し箱本体に取着された端子台とを備え、主幹ブレーカおよび各分岐ブレーカは、ＤＩＮレールが嵌入可能な嵌入溝部が後面に形成され且つ嵌入溝部内に臨む位置と臨まない位置との間で進退自在なスライダがそれぞれの器体の長手方向の一端面側に有し、取付板は、前記並設方向に延出する形で切り起こし形成され嵌入溝部に臨んでスライダに係止される張出片を中央部に有し且つ主幹ブレーカおよび分岐ブレーカを前記中央部に取着した状態で嵌入溝部の高さ位置と略同一高さ位置まで切り欠いて張出片の切り起こし孔に連通する切欠部が両端部に形成され、主幹ブレーカおよび分岐ブレーカの嵌入溝部から前記両端部の切欠部にかけて前記接地側送り線を挿通させてなるものであり、取付板の張出片の切り起こし孔から両端部の切欠部にかけて主幹ブレーカの接地側出力端子に接続された接地側送り線を挿通させて端子板に接続することができ、分岐ブレーカの出力端子に接続される分岐用の電線を引き回す際、接地側送り線が邪魔にならず、もって分岐用の電線を引き回す作業が容易となるという効果がある。
【００３９】
請求項２の発明は、請求項１の発明において、前記接地側送り線の外径寸法を、前記取付板に前記主幹ブレーカおよび前記分岐ブレーカを取着した状態で前記取付板の前面から前記嵌入溝部の内底面の高さ位置までの間に収まる寸法としたので、前記接地側送り線を前記嵌入溝部の内底面に当接する形で配設すれば、前記接地側送り線が前記取付板の後面側に突出することがなくなり、もって前記各分岐ブレーカに接続される分岐用の電線を前記取付板と前記箱本体の前記背板との間に挿通させる形で前記分岐ブレーカの入力端子側に引き回すときに前記接地側送り線が邪魔にならず、もって分岐用の電線を引き回す作業が容易となるという効果がある。
【００４０】
請求項３の発明は、請求項１の発明において、前記取付板の両端部は、前記中央部との連設部分と前記両端部を取着する一対の側板の先端との間であって前記箱本体の前面側から見た間隔を前記接地側送り線の外径寸法よりも大きくしてあるので、前記取付板の両端部と該両端部を取着する一対の側板との間であって、前記接地側送り線を引き回した状態で、前記取付板の両端部を前記箱本体の前面側から前記一対の側板に着脱する際、前記一対の側板に接地側送り線が干渉することなく前記取付板を着脱させることができ、もって前記箱本体に前記取付板を着脱する作業が容易となるという効果がある。
【００４１】
請求項４の発明は、請求項３の発明において、前記取付板の両端部は、前記箱本体の一対の側板の前端に取着される耳片および耳片から背板へ向かって延出して中央部に連設される折曲片にて形成され、前記折曲片は、前記中央部との連設部分から耳片との連設部分にかけて傾斜した状態に折曲形成されているので、折曲片を直角に折曲する場合に比べて耳片を小さくすることができ、前記取付板の形成時に材料取りが良くなり、低コスト化を図れるという効果がある。
【図面の簡単な説明】
【図１】実施形態の分電盤における要部分解斜視図である。
【図２】同上の分電盤の分解斜視図である。
【図３】同上の分電盤の断面図である。
【図４】同上の分電盤の側断面図である。
【図５】同上の分電盤において蓋体を取り外した状態の正面図である。
【図６】同上の分電盤における要部分解斜視図である。
【図７】同上の分電盤における一部破断した要部正面図である。
【図８】同上の分電盤における要部断面図である。
【図９】同上の分電盤における取付板からの分岐ブレーカの取り外し方の説明図である。
【図１０】同上の分電盤における取付板からの分岐ブレーカの取り外し方の説明図である。
【図１１】同上の分電盤における導電バーへの絶縁カバーの取り付け方の説明図である。
【図１２】同上の分電盤における導電バーへの絶縁カバーの取り付け方の説明図である。
【図１３】同上の分電盤における２Ｐ型の分岐ブレーカの配設方法の説明図である。
【図１４】同上の分電盤における２Ｐ型の分岐ブレーカの配設方法の説明図である。
【図１５】従来例を示す分電盤の要部正面図である。
【図１６】同上の分電盤の側断面図である。
【符号の説明】
６　主幹ブレーカ
７　分岐ブレーカ
１０　箱本体
３０　取付板
３１　主片
３２　段差部
３３　耳片
３８　切欠部
８０　端子台
８１ｂ　端子板
９６　接地側送り線
９７　電源側送り線
１００　導電バー[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a distribution board containing breakers conforming to DIN standards.
[0002]
[Prior art]
As such a conventional distribution board, there is one disclosed in Japanese Patent Application Laid-Open No. 2001-28810. As shown in FIGS. 15 and 16, the distribution board disclosed in this publication has both ends 143 and 143 attached to left and right side plates 12 and 12 of the box body 10, respectively, and a central portion 141 has a back plate 11. A mounting plate 140 recessed on the side, a DIN rail 40 mounted on the front side of the mounting plate 140, a main breaker 6 mounted on the DIN rail 40, and a row of the main breaker 6 arranged side by side. And a plurality of branch breakers 7 attached to the DIN rail 40.
[0003]
The DIN rail 40 has a U-shaped cross section, and overhanging pieces 41, 41 extend in directions away from the respective leading edges of both leg pieces. On the other hand, in the branch breaker 7 attached to the DIN rail 40, a fitting groove 72 into which a part of the DIN rail 40 can be fitted is formed on the rear surface of the body, and a DIN groove is formed on one inner surface of the fitting groove 72. A locking groove 73 that locks one of the overhanging pieces 41 of the rail 40 is formed, and the other overhanging piece of the DIN rail 40 projects on the other inner side surface of the fitting groove 72 so as to advance and retreat into the fitting groove 72. A slider (not shown) for locking the 41 is provided and can be attached to the DIN rail 40. Incidentally, the main breaker 6 also has the same fitting groove, locking groove, and slider as the branch breaker 7 as a structure to be attached to the DIN rail 40.
[0004]
Each of the branch breakers 7 disposed in the box body 10 described above is inserted into the respective input terminals 79a from the power supply side output terminal 69d of the main breaker 6 between the mounting plate 140 and the back plate 11 of the box body 10. The conductive bar 100 ′ connected via the power supply side feed line 97 is connected. In addition, a ground side feed line 96 inserted between the mounting plate 140 and the back plate 11 of the box body 10 is connected to the ground side output terminal 69a of the main breaker 6, and is attached to the box body 10. The ground side feeder 96 is connected to a terminal plate 81b provided on the terminal block 80 ', and in order to supply electricity to the load, the load is connected to the output terminal 79b of the branch breaker 7 and the terminal plate 81a is connected to the output terminal 79b. This is done by connecting. In the conductive bar 100 ', a branch connecting piece 102' extending from the bar main body 101 'is connected to the input terminal 79a of the branch breaker 7.
[0005]
[Problems to be solved by the invention]
By the way, in the above-mentioned distribution board, the power supply side feed line 97 connected to the conductive bar 100 ′ and the ground side feed line 96 connected to the terminal plate 81 b are connected to the mounting plate 140 and the back plate of the box body 10. 11, an electric wire for branching connected to the output terminal 79 b of the branch breaker 7 is inserted between the mounting plate 140 and the back plate 11 of the box body 10, and the input of the branch breaker 7 is made. When routed to the terminal 79a side, the feed lines 96 and 97 hindered, and it was difficult to route the branching wire.
[0006]
SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a distribution board that facilitates the work of routing electric wires.
[0007]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a box body having a back plate and a side plate erected from the periphery of the back plate and having a front opening, and a main breaker housed inside the box body. A plurality of branch breakers juxtaposed to the main breaker, and an output terminal on the power supply side of the main breaker and an input terminal of the branch breaker, which are arranged inside the box body and extend in the juxtaposition direction of the branch breakers. A conductive bar for electrical connection, a mounting plate on which the main breaker and each branch breaker are mounted on the front side, and a terminal plate electrically connected to a ground-side output terminal of the main breaker via a ground-side feed wiring. A terminal block attached to the holding box main body, wherein the main breaker and each branch breaker have a fitting groove formed on a rear surface into which a DIN rail can be fitted, and a position between a position facing the fitting groove and a position not facing the fitting groove. In advance A free slider is provided on one end surface side in the longitudinal direction of each body, and the mounting plate is cut and raised so as to extend in the juxtaposed direction, and is extended to be engaged with the slider facing the fitting groove. A notch having a piece in the center and having the main breaker and the branch breaker attached to the center and cut out to a position substantially equal to the height of the fitting groove to communicate with the cut-and-raised hole of the overhanging piece; Parts are formed at both ends, and the ground-side feed line is inserted from the fitting groove of the main breaker and the branch breaker to the notch at the both ends, and the projecting piece of the mounting plate is formed. The ground-side feed line connected to the ground-side output terminal of the main breaker can be inserted from the cut-and-raised hole to the notch at both ends, and connected to the terminal board, and used for branching connected to the output terminal of the branch breaker. Route the wires When, unobtrusive ground-side feed line, thereby facilitating the work of laying the electric wire for the branch have.
[0008]
According to a second aspect of the present invention, in the first aspect of the present invention, the outer diameter of the ground-side feed line is adjusted such that the outer diameter of the ground side feed line is fitted from the front surface of the mounting plate with the main breaker and the branch breaker mounted on the mounting plate. Since the dimensions are set to fit within the height of the inner bottom surface of the groove, if the ground-side feed line is disposed in contact with the inner bottom surface of the fitting groove portion, the ground-side feed line can be attached to the mounting plate. No longer protruding to the rear side, the branching wire connected to each of the branch breakers is inserted between the mounting plate and the back plate of the box body in the input terminal side of the branch breaker. The ground-side feeder does not become an obstacle when it is routed, thereby facilitating the work of routing the branching wire.
[0009]
According to a third aspect of the present invention, in the first aspect of the present invention, both end portions of the mounting plate are located between a continuous portion with the central portion and a tip of a pair of side plates for attaching the both end portions. Since the interval as viewed from the front side of the box body is larger than the outer diameter of the ground-side feed line, the distance between both ends of the mounting plate and a pair of side plates for attaching the both ends. When the both ends of the mounting plate are attached to and detached from the front side of the box body to the pair of side plates while the ground side feed line is routed, the ground side feed line does not interfere with the pair of side plates. The mounting plate can be attached and detached, so that the operation of attaching and detaching the attaching plate to and from the box main body is facilitated.
[0010]
According to a fourth aspect of the present invention, in the third aspect of the present invention, both end portions of the mounting plate extend from the ear piece to the back plate from the ear piece attached to the front ends of the pair of side plates of the box body. Since it is formed of a bent piece continuously provided at the center portion, and the bent piece is bent and formed in an inclined state from a portion connected to the center portion to a portion connected to the ear piece, As compared with the case where the bent piece is bent at a right angle, the ear piece can be made smaller, the material can be removed more efficiently when the mounting plate is formed, and the cost can be reduced.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the distribution board of the present embodiment will be described with reference to FIGS.
[0012]
As shown in FIGS. 2 to 4, the distribution board of the present embodiment has one main breaker 6 and a plurality of branch breakers 7 disposed inside the box 1 as an internal unit. 6 and the plurality of branch breakers 7 are arranged side by side in a row. The box body 1 includes a metal box body 10 having a front opening, and a lid 20 coupled to the box body 10 so as to close the opening of the box body 10. The box main body 10 is embedded in a construction surface such as a wall surface.
[0013]
The box body 10 is composed of a rectangular back plate 11 and side plates 12 erected forward from the periphery of the back plate 11, and the support pieces 13, 13 approach from each other from the front edges of the left and right side plates 12. It has been extended. Here, screw holes 14, 14 are formed in each support piece 13, and a mounting plate 30 for mounting the main breaker 6 and the plurality of branch breakers 7 is provided between the left and right support pieces 13, 13. .
[0014]
The mounting plate 30 is formed of a sheet metal (iron plate), and ear pieces 33, 33 are extended through left and right end portions of a main piece 31 formed in an elongated rectangular shape through step portions 32. ing. Each of the ear pieces 33 has a keyhole shape in which a part of a large-diameter portion having a round hole shape larger than the diameter of the head of the mounting screw 51 is continuously provided with a groove narrower than the diameter of the head of the mounting screw 51. Are formed, respectively. Therefore, with the mounting screws 51, 51 loosely screwed into the screw holes 14, 14 of the respective support pieces 13, 13, the heads of the mounting screws 51, 51 are passed through the large-diameter portions of the mounting holes 34, 34, and the mounting is performed. After the heads of the screws 51, 51 are slid to the positions corresponding to the grooves, the mounting plates 30 can be easily mounted on the box body 10 by tightening the mounting screws 51, 51.
[0015]
The left ear piece 33 in FIG. 5 has a set screw hole 35 formed below the mounting hole 34, and the right connecting piece 33 has a set screw hole 35 formed above the mounting hole 34. The lid 20 is attached using fixing screws 52, 52 that are screwed into the holes 35, 35.
[0016]
On the other hand, the lid 20 includes a cover 21 whose outer dimensions in the up-down direction and the left-right direction are set larger than the box body 10 and are coupled to the mounting plate 30 using fixing screws 52, 52, and a door 22 described later. Have been. Here, a concave portion 23 recessed toward the rear side from the peripheral portion is formed at a central portion of the front surface of the cover 21, and a concave portion 24 further concaved toward the rear side is formed at the central portion of the concave portion 23, A rectangular window hole 25 that exposes a part of the inner unit such as the main breaker 6 and the branch breaker 7 is formed in the inner surface of the recess 24. The cover 21 has stopper holes 26, 26 through which the above-mentioned fixing screws 52, 52 are inserted, formed at both left and right ends of the inner surface of the recess 23. A notch 13a is formed to avoid interference between the fixing screws 52, 52.
[0017]
The opening size of the window hole 25 is set so that the handles 6a, 7a of the main breaker 6 and the plurality of branch breakers 7 attached to the attachment plate 30 can be exposed collectively. The above-described door 22 is pivotally mounted on the cover 21 so as to be openable and closable between a position for covering the concave portion 23 and a position for opening the concave portion 23. The door 22 is provided with a shaft portion at the upper ends of the left and right side surfaces when the door 22 is closed.
[0018]
At the position where the door 22 covers the recess 23, the front surface of the door 22 and the front surface of the cover 21 are substantially flush. On the other hand, at the position where the door 22 opens the recess 23, the handles 6a, 7a of the breakers 6, 7 can be operated. In order to prevent the door 22 from being easily opened when the door 22 is to be closed, a lock projection 27 (see FIG. 4) is provided on the rear surface of one end of the door 22 far from the shaft portion. A receiving catch 28 (see FIG. 4) is provided. This type of catch 28 is a well-known mechanism, and locks the lock projection 27 so that it does not come out when the lock projection 27 is inserted by pushing the lower part of the door 22. When the lock projection 27 is pushed into the catch 28 and released, the locked state of the lock projection 27 is released.
[0019]
By the way, the branch breaker 7 attached to the mounting plate 30 is a 1P type breaker, and the size of the body 70 of the branch breaker 7 is, for example, the size of the unit size of the electric light distribution board contract type wiring breaker. Is formed. On the other hand, the size of the body 60 of the main breaker 6 is formed to be twice as large as the unit size (the size of two units). That is, the main body 60 of the main breaker 6 is formed to have a size in which two main bodies 70 of the 1P-type branch breaker 7 are arranged in the width direction. Note that a branch breaker 7 ′ (see FIGS. 13 and 14) described later is a 2P-type breaker, and the dimensions of the body 70 ′ of the branch breaker 7 ′ are the same as those of the body 60 of the main breaker 6. It is formed in a size twice as large as the unit size (a size for two pieces).
[0020]
The branch breaker 7 has a fitting groove 72 for attachment to the DIN rail 40 described in the conventional example formed on the rear surface of the body 70. One of the inner surfaces of the fitting groove 72 is a DIN rail 40 (FIG. 15). And FIG. 16), a locking groove 73 capable of locking one of the overhanging pieces 41 is formed, and the other overhanging piece of the DIN rail 40 projects on the other inner side from the inner side. A slider 74 capable of locking the 41 is held. The main breaker 6 and the branch breaker 7 'are also formed with similar fitting grooves and locking grooves to hold the slider. Since the structure of each of the breakers 6, 7, 7 'described above is well known, a detailed description is omitted.
[0021]
On the other hand, the main piece 31 of the mounting plate 30 is formed in a shape in which an overhanging piece 36 having an inverted L-shaped cross section is cut and raised on the front side, and a portion where the overhanging piece 36 is cut and raised is rectangular. The opening window 31a is provided. The mounting plate 30 has a number of inverted L-shaped hooking claws 37 (see FIG. 8 and FIG. 13) that can be inserted into hooking holes 77 (see FIGS. 8 and 13) formed on the input-side end faces of the breakers 6, 7, 7 ′. 1, 8, and 13) extend from the upper edge of the main piece 31. Here, the hooking claws 37 are formed at an equal pitch in the longitudinal direction of the main piece 31. 8, the distance between the hooking claw 37 and the overhanging piece 36 in the short direction of the main piece 31 is such that the hooking claw 37 is inserted and locked in the hooking hole 77, as shown in FIG. 37 is set so as to face the fitting groove 72 and be locked by the slider 74. Further, a plurality of elastic stopper members 130a with which the output end surfaces of the breakers (the main breaker 6, the branch breakers 7, 7 ') abut on the lower front side of the mounting plate 30 are connected in the left-right direction and are made of synthetic resin. A retaining block 130 is provided.
[0022]
Here, as shown in FIGS. 1, 7 and 8, for example, as shown in FIGS. 1, 7 and 8, the elastic retaining member 130 a has a pair of end faces (lower faces in FIG. 7) on both sides of the slider 74 of the branch breaker 7. And a connecting piece 132 that connects the pair of contact pieces 131 and 131 to face the rear surface of the slider 74. Therefore, the pair of abutting pieces 131, 131 abut on the output side end face of the branch breaker 7 on both sides of the slider 74 in the width direction of the branch breaker 7, so that the branch breaker 7 can be reduced in pecking and the branch breaker 7 can be mounted. It can be firmly attached to the mounting plate 30. The connecting piece 132 is shown in FIGS. 9 and 10 in a direction (downward in FIG. 7) in which the slider 74 is released from the state in which the overhanging piece 36 is locked (see FIGS. 7 and 8). When the branch breaker 7 is shifted as described above, the rear surface of the slider 74 abuts and the end on the side holding the slider 74 in the longitudinal direction of the branch breaker 7 is inclined so as to be separated from the main piece 31 of the mounting plate 30. Since the released release surface 133 is formed, the work of removing the branch breaker 7 from the mounting plate 30 becomes easy. Further, since the release surface 133 is inclined so that the height position from the surface of the mounting plate 30 gradually increases as the distance from the end surface of the branch breaker 7 increases, the direction in which the slider 74 is released from the overhanging piece 36. When the branch breaker 7 is moved, the rider gradually rides on the inclined surface 133, so that the force for moving the slider 74 in the direction of releasing the slider 74 from the overhanging piece 36 can be reduced, and the branch breaker 7 can be moved from the mounting plate 30. Removal work is further facilitated.
[0023]
Therefore, by engaging the hook 37 with the hook hole 77 of the branch breaker 7 and locking the projecting piece 36 with the slider 74, the branch breaker 7 can be easily attached to the mounting plate 30. By moving the branch breaker 7 in a direction in which the slider 74 is released from the overhanging piece 36, the branch breaker 7 can be easily removed from the mounting plate 30. The above-mentioned main breaker 6 and branch breaker 7 ′ can be similarly attached to the attachment plate 30 or removed from the attachment plate 30.
[0024]
By the way, each input terminal 79a of each branch breaker 7 is connected to a conductive bar 100 which is electrically connected to a power supply output terminal 69d of the main breaker 6 via a power supply feed line 97.
[0025]
The upper side plate 12 and the lower side plate 12 of the box main body 10 are provided with a plurality of circular knockout portions 16 that can be cut in parallel in the left-right direction. The main body breaker 6 has a power supply side input terminal 69a connected to a power supply line introduced into the box main body 10 from the outside of the box main body 10 through the wiring hole, and a ground side input terminal 69b. Similarly, the ground wire introduced into the box body 10 is connected. Here, as is well known, the ground-side input terminal 69a of the main breaker 6 includes a terminal fitting (not shown) having a rectangular cross section housed in the body 60 and a tightening screw inserted into the upper piece of the terminal fitting. A screw 66 (see FIG. 5) and a terminal plate (not shown) that contacts the lower end of the tightening screw 66 are provided. A screw operation hole 68 (see FIG. 1) formed on the front surface of the body 60 has a screwdriver or the like. When the tightening screw 66 is rotated by inserting the tip of the terminal, the distance between the lower piece of the terminal fitting and the terminal plate can be changed.
[0026]
Therefore, a wiring member such as an electric wire or a bus bar is inserted between the terminal fitting and the terminal plate through the connection hole 65 (see FIG. 1) penetrating through the peripheral wall of the body 60, and the tightening screw 66 is rotated. By bringing the lower piece of the terminal fitting closer to the terminal plate, the wiring member is sandwiched between the terminal fitting and the terminal plate, and electrical connection with the wiring member can be performed. The structure of the power input terminal 69b, the ground output terminal 69c, and the power output terminal 69d of the main breaker 6 is the same as that of the ground input terminal 69a. The structure of the input terminal 79a and the output terminal 79b of the branch breaker 7 is the same as the structure of the power supply side input terminal 69b of the main breaker 6, and a connection hole 75 (see FIG. ), Insert a wiring member such as an electric wire or bus bar between the terminal fitting and the terminal plate, and rotate the tightening screw 76 to bring the lower piece of the terminal fitting close to the terminal plate, thereby connecting the wiring member with the terminal fitting and the terminal plate. It is sandwiched between plates and can be electrically connected to a wiring member.
[0027]
The conductive bar 100 has a strip-shaped bar main body 101 and a plurality of L-shaped branch connection pieces 102 projecting from one side edge of the bar main body 101 in the short direction (width direction). Here, the branch connection piece 102 includes a connection piece 102a protruding along the short direction of the bar main body 101, and an insertion terminal piece extending in a direction orthogonal to the connection piece 102a from a leading edge of the connection piece 102a. 102b are formed continuously and integrally. Here, the insertion terminal piece 102b extends in a direction orthogonal to the connection piece 102a so as to face the main piece 31 of the mounting plate 30. Further, the branch connecting piece 102 is provided with a cutting groove 103 near the bar main body 101 so that the branch connecting piece 102 can be cut from the bar main body 101. The cutting groove 103 will be described later. In the present embodiment, the branch connecting piece 102 extends from one end of the bar body 101 in the width direction to form a branch connecting part connected to the input terminal of the branch breaker 7, and the cutting groove 103 serves as a cutting auxiliary part. Is composed.
[0028]
Also, as shown in FIGS. 1 and 6, the conductive bar 100 has a terminal piece 104 extending from one side edge of the bar main body 101 in a direction opposite to the insertion terminal piece 102b at one end in the longitudinal direction. A terminal hole 105 through which a terminal screw 107 is inserted is formed in the piece 104. Here, the terminal screw 107 is screwed into a nut 108 provided at the bottom of the recess 81 of the relay terminal block 90, whereby the power supply side feed line 97 and the conductive bar 100 can be electrically connected. The relay terminal block 90 is open on the left side and the lower side in FIG. The connection base 90 is provided with a door 93 that can be opened and closed between a position where the front side of the terminal screw 107 is opened (see FIG. 6) and a position where the front side of the terminal screw 107 is covered (see FIG. 1). ing.
[0029]
By the way, inside the box body 10, near the upper side plate 12, a terminal block 80 for connecting an internal unit such as each of the breakers 6, 7, 7 'and an external electric wire is provided.
[0030]
The terminal block 80 is composed of two elongated terminal plates (hereinafter, referred to as wire connection portions) 81a and 81b made of a conductive material arranged side by side on a base 80a made of a synthetic resin having an insulating property. Is established. A large number of screw holes (not shown) into which the terminal screws 85 are screwed are arranged in the longitudinal direction (left and right direction) on the front surfaces of the electric wire connection portions 81a and 81b. Are formed with a large number of wiring insertion holes (not shown) which communicate with the respective screw holes. Thus, in the terminal block 80, by inserting a wiring member such as an electric wire into the wiring insertion hole and tightening the terminal screw 85 of the screw hole corresponding to the wiring insertion hole, the wiring member is connected to the electric wire connection portions 81a and 81b. Connected. The terminal block 80 is mounted between the upper ends of the left and right support pieces 13, 13 of the box body 10 using connecting screws 53, 53 (see FIG. 5), and has a central portion that is recessed from both ends. 120 is disposed on the front side of the center. The one wire connection portion 81a is attached to the mounting bracket 120 together with the base 80a using the fixing screw 86, and is grounded to the box body 10 via the mounting bracket 120. The other electric wire connection portion 81b is electrically insulated from the box body 10. Here, a power supply line (not shown) externally introduced into the box body 10 is connected to the power supply side input terminal 69b of the main breaker 6, and a ground side output terminal 69c is connected via a ground side feed line 96. It is connected to the electric wire connection part 71b. Further, the power supply side output terminal 69d of the main breaker 6 is connected to the conductive bar 100 via the power supply side feed line 97, and the conductive bar 100 is connected to the input terminal (power side terminal) 79a of the branch breaker 7. . Then, a load is connected between the output terminal (load-side terminal) 79b of each branch breaker 7 and each terminal screw 85 of the electric wire connection portion 81b. In addition, the ground wire from the load is connected to the wire connection portion 81a grounded to the box body 10.
[0031]
The ground-side feeder 96 is routed from the left side to the right side in FIG. 5 through the inside of the fitting groove on the rear side of each of the breakers 6 and 7. Here, as shown in FIG. 11, the outer diameter H1 of the ground-side feeder 96 is such that the main breaker 6 and the branch breaker 7 are attached to the main piece 31 of the mounting plate 30, and the fitting groove from the front face of the main piece 31. It is smaller than the dimension H2 up to the inner bottom surface. A notch 38 (see FIG. 1) communicating with an opening window 31a formed in the main piece 31 is formed in a step 32 extending from both ends of the main piece 31 of the mounting plate 30. The notch 38 is cut out to the same height as the inner bottom surface of the fitting groove of each breaker 6, 7 in a state where the breakers 6, 7 are attached to the main piece 31. A ground-side feed line 96 can be passed through 38. Therefore, if the ground-side feeder 96 is disposed so as to contact the inner bottom surface of the fitting groove of each of the breakers 6 and 7, the ground-side feeder 96 can be exposed on the rear surface side of the main piece 31 of the mounting plate 30. And a branch wire connected to each output terminal 79b of each branch breaker 7 is inserted between the rear surface of the main piece 31 and the back plate 11 of the box body 10 so as to be connected to the input terminal 79a side of the branch breaker 7. The ground-side feeder 96 does not become an obstacle when it is routed, so that the work of routing the branching wire becomes easier.
[0032]
By the way, in the present embodiment, a state in which the branch connection piece 102 as the branch connection portion is connected to the input terminal 79a of each branch breaker 7 (a state in which the branch connection piece 102 is inserted into the connection hole 75 and the tightening screw 76 is tightened). The insulating cover 110 covering the exposed portion of the branch connection piece 102 is attached to the bar main body 101 of the conductive bar 100. Here, the dimension of the insulating cover 110 in the left-right direction is set so that the plurality of branch connection pieces 102 can be collectively covered. In the present embodiment, the fourteen branch connection pieces 102 are divided into three pieces. Cover 110.
[0033]
Here, a cutting groove 103 (see FIGS. 1 and 8) serving as the above-described cutting auxiliary portion is formed at a portion where the branch connection piece 102 and the bar main body 101 are connected. The unconnected branch connection piece 102 can be easily cut at the position of the cutting groove 103. Further, the insulating cover 110 has a cut groove 113 extending along the branch connecting piece 102 to substantially the same position as the cutting groove 103, so that a portion of the insulating cover 110 corresponding to the cut branch connecting piece 102 is removed. Cutting can be easily performed at the position of the cut groove 103. When removing some of the 1P-type branch breakers 7 from the mounting plate 30 and attaching the 2P-type branch breakers 7 'as shown in FIGS. 13 and 14, the 2P-type branch breakers 7' as shown in the respective drawings are used. Of the two input terminals of the branch breaker 7 ', the branch connection piece 102 corresponding to the input terminal to which the conductive bar 100 is not connected is cut, and the portion corresponding to the branch connection piece 102 in the insulating cover 110 is cut and inserted. By forming the groove 116, another conductor such as the electric wire 98 can be easily connected to the input terminal to which the conductive bar 110 is not connected through the insertion groove 116 formed in the insulating cover 110. In short, in the distribution board of the present embodiment, the work of changing from the 1P-type branch breaker 7 to the 2P-type branch breaker 7 'becomes easy.
[0034]
In the conductive bar 100, as described above, the branch connection piece 102 extends from one end in the width direction of the bar main body 101. However, the insulating cover 110 connects the other end of the bar main body 101 in the width direction. Since it has a mounting portion 111 having a U-shaped cross section which is attached in a sandwiching manner, and a cover main body 112 which is rotatably connected to the mounting portion 111 and is locked to the end surface of the bar main body 101 at the one end side. After attaching the mounting portion 111 of the insulating cover 110 to the bar main body 101 as shown in FIG. 11, the cover main body 112 is rotated counterclockwise in FIG. The main body 112 can be put on the surface of the conductive bar 100 and locked to the bar main body 101 of the conductive bar 100. Thus, the insulating cover 110 can be retrofitted with the conductive bar 100 connected to the branch breaker 7, and the work of attaching the insulating cover 110 to the conductive bar 100 becomes easy. The cover body 112 is provided with an engagement projection 115 that is continuously and integrally protruded from the bar body 101 of the conductive bar 100 at a portion between the adjacent branch connection pieces 102. The contact ribs 114 that are in contact with each other are continuously and integrally provided.
[0035]
Further, in the distribution board of the present embodiment, since the conductive bar 100 is disposed so that the width direction of the bar body 101 is orthogonal to the front surface of the main piece 31 of the mounting plate 30, the conductive bar 100 is disposed from the front side of the box body 10. When viewed, the amount of protrusion of the conductive bar 100 from the branch breaker 7 is reduced, and the size of the box body 10 can be reduced. That is, the outer dimensions of the box body 10 in the vertical direction in FIG. 5 can be made smaller than in the conventional configuration shown in FIG.
[0036]
In the distribution board of the present embodiment described above, the main breaker 6 and the branch breaker 7 are cut off to a position substantially the same as the height position of the fitting groove 72 in a state where the main breaker 6 and the branch breaker 7 are attached to the main piece 31 of the mounting plate 30. Notch portions 38, 38 communicating with the opening windows 31a, which are cut-and-raised holes of the overhanging piece 36, are formed in the step portions 32, 32. Since the 96 is inserted, the ground side feed line 96 connected to the ground side output terminal 69c of the main breaker 6 is inserted from the opening window 31a of the mounting plate 30 to the cutouts 38, 38 and connected to the terminal plate. When the wiring for branching connected to the output terminal 79b of the branch breaker 7 is routed, the ground-side feeder 96 does not become an obstacle, and the work for routing the branching wire becomes easy. In addition, the outer diameter of the ground-side feed line 96 is set within a range from the front surface of the mounting plate 30 to the height of the inner bottom surface of the fitting groove in a state where the main breaker 6 and the branch breaker 7 are mounted on the mounting plate 30. Since the ground-side feeder 96 is disposed so as to abut the inner bottom surface of the fitting groove, the ground-side feeder 96 does not protrude to the rear side of the mounting plate 30. The grounding-side feeder 96 does not interfere when the branching wire connected to the wire is routed to the input terminal 79a side of the branch breaker 7 in such a manner as to be inserted between the mounting plate 30 and the back plate 11 of the box body 10. In addition, the work of routing the branching wire becomes easy.
[0037]
By the way, in the present embodiment, the main piece 31 of the mounting plate 30 forms the center of the mounting plate 30, and the step 32 and the lug 33 on both sides of the main piece 31 form both ends of the mounting plate 30. The distance between the end of the left and right side plates 12, 12 to which both ends of the mounting plate 30 are attached, and the space viewed from the front side of the box body 10 is grounded. Since the outer diameter of the side feed line 96 is larger than that of the side feed line 96 (see FIG. 5), it is located between both ends of the mounting plate 30 and the pair of side plates 12 for attaching the both ends to the ground side. When both ends of the mounting plate 30 are attached to and detached from the front side of the box body 10 with the pair of side plates 12 in a state where the feed line 96 is routed, the ground side feed line 96 may interfere with the pair of side plates 12. The attachment plate 30 can be attached and detached without the need, and the work of attaching and detaching the attachment plate 30 to and from the box body 10 is easy. That. Further, in the present embodiment, the step portion 32 of the mounting plate 30 extends from the ear piece 33 toward the back plate 11 to form a bent piece continuously provided at the center, and the bent piece is located at the center. The bent portion is bent from the portion connected to the portion to the portion connected to the ear piece 33 (see FIG. 3), so that the ear piece 33 is bent more than when the bent piece is bent at a right angle. There is an advantage that the size can be reduced, material can be easily removed when the mounting plate 30 is formed, and cost can be reduced.
[0038]
【The invention's effect】
According to the first aspect of the present invention, the main body is constituted by a back plate and a side plate erected from the periphery of the back plate and has a front opening, a main breaker housed inside the box main body, and a main breaker arranged side by side. A plurality of branch breakers, and a conductive bar that is disposed inside the box body and extends in the direction in which the branch breakers are arranged and electrically connects an output terminal on the power supply side of the main breaker and an input terminal of the branch breaker. A mounting plate on which the main breaker and each branch breaker are mounted on the front side, and a terminal plate electrically connected to a ground-side output terminal of the main breaker via a ground-side feed wiring, and attached to the box body. The main breaker and each of the branch breakers each have a fitting groove on the rear surface into which a DIN rail can be fitted, and each of the sliders that can move back and forth between a position facing the fitting groove and a position not facing the fitting groove. The mounting plate is provided on one end surface side in the longitudinal direction of the container, and the mounting plate has a protruding piece at the center portion which is cut and raised so as to extend in the juxtaposed direction and is engaged with the slider facing the fitting groove. The main breaker and the branch breaker are attached to the central portion, and cutouts are formed at both ends by cutting out to a position substantially equal to the height position of the fitting groove portion and communicating with the cutout and raised hole of the overhanging piece. The ground-side feed line is inserted from the insertion groove portion of the main breaker and the branch breaker to the cutout portion of the both ends, and extends from the cut-and-raised hole of the projecting piece of the mounting plate to the cutout portion of both ends. The ground-side feed line connected to the ground-side output terminal of the breaker can be inserted and connected to the terminal plate.When the branch wire connected to the output terminal of the branch breaker is routed, the ground-side feed line is obstructed. Not enough Working routing the wire of use there is an effect that it becomes easy.
[0039]
According to a second aspect of the present invention, in the first aspect of the present invention, the outer diameter of the ground-side feed line is adjusted such that the outer diameter of the ground side feed line is fitted from the front surface of the mounting plate with the main breaker and the branch breaker mounted on the mounting plate. Since the dimensions are set to fit within the height of the inner bottom surface of the groove, if the ground-side feed line is disposed in contact with the inner bottom surface of the fitting groove portion, the ground-side feed line can be attached to the mounting plate. No longer protruding to the rear side, the branching wire connected to each of the branch breakers is inserted between the mounting plate and the back plate of the box body in the input terminal side of the branch breaker. There is an effect that the ground-side feeder does not become a hindrance when it is routed, thereby facilitating the work of routing the branching wire.
[0040]
According to a third aspect of the present invention, in the first aspect of the present invention, both end portions of the mounting plate are located between a continuous portion with the central portion and a tip of a pair of side plates for attaching the both end portions. Since the interval as viewed from the front side of the box body is larger than the outer diameter of the ground-side feed line, the distance between both ends of the mounting plate and a pair of side plates for attaching the both ends. When the both ends of the mounting plate are attached to and detached from the front side of the box body to the pair of side plates while the ground side feed line is routed, the ground side feed line does not interfere with the pair of side plates. The mounting plate can be attached and detached, so that the operation of attaching and detaching the attaching plate to and from the box body is facilitated.
[0041]
According to a fourth aspect of the present invention, in the third aspect of the present invention, both end portions of the mounting plate extend from the ear piece to the back plate from the ear piece attached to the front ends of the pair of side plates of the box body. Since it is formed of a bent piece continuously provided at the center portion, and the bent piece is bent and formed in an inclined state from a portion connected to the center portion to a portion connected to the ear piece, As compared with the case where the bent piece is bent at a right angle, the size of the ear piece can be reduced, so that the material can be easily removed when the mounting plate is formed, and the cost can be reduced.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a main part of a distribution board according to an embodiment.
FIG. 2 is an exploded perspective view of the distribution board.
FIG. 3 is a sectional view of the distribution board according to the first embodiment.
FIG. 4 is a side sectional view of the distribution board according to the first embodiment.
FIG. 5 is a front view of the distribution board with the lid removed.
FIG. 6 is an exploded perspective view of a main part of the distribution board.
FIG. 7 is a front view of an essential part of the distribution board, which is partially broken.
FIG. 8 is a cross-sectional view of a main part of the distribution board.
FIG. 9 is an explanatory diagram of how to remove a branch breaker from a mounting plate in the distribution board.
FIG. 10 is an explanatory diagram of how to remove a branch breaker from a mounting plate in the distribution board.
FIG. 11 is an explanatory diagram of how to attach an insulating cover to a conductive bar in the distribution board.
FIG. 12 is an explanatory diagram of how to attach an insulating cover to a conductive bar in the distribution board.
FIG. 13 is an explanatory diagram of a method of arranging a 2P type branch breaker in the above distribution board.
FIG. 14 is an explanatory diagram of a method of arranging a 2P-type branch breaker in the above distribution board.
FIG. 15 is a front view of a main part of a distribution board showing a conventional example.
FIG. 16 is a side sectional view of the distribution board of the above.
[Explanation of symbols]
Reference Signs List 6 main breaker 7 branch breaker 10 box main body 30 mounting plate 31 main piece 32 step portion 33 ear piece 38 cutout portion 80 terminal block 81b terminal plate 96 ground side feed line 97 power supply side feed line 100 conductive bar

Claims

A box body composed of a back plate and side plates erected from the periphery of the back plate and having a front opening, a main breaker housed inside the box body, a plurality of branch breakers juxtaposed to the main breaker; A conductive bar that is disposed inside the box body and extends in the juxtaposition direction of the breakers and electrically connects the output terminal on the power supply side of the main breaker and the input terminal of the branch breaker; and the main breaker and each branch breaker. A mounting plate attached to the front side, and a terminal block having a terminal plate electrically connected to a ground output terminal of the main breaker via a ground feed line, and having a terminal block attached to the box body, In the main breaker and each branch breaker, a fitting groove in which a DIN rail can be fitted is formed on a rear surface, and a slider that can move back and forth between a position facing the fitting groove and a position not facing the fitting groove is provided in a longitudinal direction of each body. The main plate breaker and the branch breaker are provided on the end face side, and the mounting plate has a projecting piece formed at the center thereof, which is cut and raised so as to extend in the juxtaposition direction, and which is engaged with the slider while facing the fitting groove. Notches are attached to the central portion and cut out to approximately the same height position as the fitting groove portion, and cutout portions communicating with cutout and raised holes of the overhanging pieces are formed at both ends, and the main breaker and the branch breaker are formed. A power distribution board characterized in that the ground-side feeder line is inserted from the fitting groove portion to the cutout portion at both ends.

The outer diameter of the ground-side feed line is a dimension that fits from the front surface of the mounting plate to the height position of the inner bottom surface of the fitting groove in a state where the main breaker and the branch breaker are mounted on the mounting plate. The distribution board according to claim 1, wherein:

Both ends of the mounting plate are between the portion connected to the central portion and the ends of a pair of side plates to which the both ends are attached, and the distance as viewed from the front side of the box body is the ground side feed. The distribution board according to claim 1, wherein the distribution board is larger than an outer diameter of the wire.

Both ends of the mounting plate are formed of ear pieces attached to the front ends of the pair of side plates of the box body, and bent pieces extending from the ear pieces toward the back plate and continuously provided at the center. 4. The distribution board according to claim 3, wherein the bent piece is formed so as to be inclined from a portion connected to the center portion to a portion connected to the ear piece.