JP2004363066A - Terminal board and circuit breaker - Google Patents

Terminal board and circuit breaker Download PDF

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Publication number
JP2004363066A
JP2004363066A JP2003163381A JP2003163381A JP2004363066A JP 2004363066 A JP2004363066 A JP 2004363066A JP 2003163381 A JP2003163381 A JP 2003163381A JP 2003163381 A JP2003163381 A JP 2003163381A JP 2004363066 A JP2004363066 A JP 2004363066A
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Japan
Prior art keywords
bus bar
terminal block
press
spacer
terminal
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JP2003163381A
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JP4020026B2 (en
Inventor
Hiroaki Kobayashi
裕昭 小林
進 ▲たか▼橋
Susumu Takahashi
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a terminal board or a circuit breaker having good workability when the terminal board or the circuit breaker is inserted into a bus-bar, and also, having high reliability capable of easily identifying whether or not a normal electrical contact is kept of a clip terminal and a bus-bar. <P>SOLUTION: The terminal board 1 or the circuit breaker 100 is equipped with a clip terminal 30 formed nearly in U-shape, by inserting an opening part 34 of the clip terminal 30 into the bus-bar 5 and pinching the bus-bar 5. The opening part of the clip terminal 30 is locked with an open condition in a given size by using a spacer 6 in advance, so that an inserting resistance is reduced when the terminal board 1 or the circuit breaker 100 is inserted into the bus-bar 5. And also, a display means 6c is fixed to the spacer 6, whereby, it is enabled to be identified when the terminal board 1 or the circuit breaker 100 is inserted. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
この発明は、分電盤などに装着されるプラグイン方式の端子台またはこの端子台を具備する回路遮断器に関するものである。
【０００２】
【従来の技術】
従来の分電盤などに装着され、電路に過電流が流れたときに周知の引き外し動作により電路を遮断するプラグイン方式の回路遮断器にはブスバーに直接差し込むためのクリップ端子を有する端子台が装着されている。このクリップ端子はリン青銅等の板ばね材料が用いられ、各々がほぼ同一のくちばし形状となるように成形され、安定した接触圧力でブスバーに挟持させるためにブスバーの厚さに対して隙間を狭くした構成にしている（例えば、特許文献１参照）。
【０００３】
【特許文献１】
特開２００２−２３７２４８（図３）
【０００４】
【発明が解決しようとする課題】
従来のクリップ端子を有する端子台は以上のように構成されており、端子台をブスバーに挿入するときにクリップ端子を押し広げるための荷重が挿入抵抗となって、作業性が悪いという課題があった。
また、その挿入抵抗に対して無理やり挿入しようとすると、クリップ端子を変形させてしまう課題があった。
さらにまた、挿入力の大きな大形の回路遮断器においては、回路遮断器を取付ける時に回路遮断器が取付けられる取付板を変形させてしまうことがあり、クリップ端子とブスバーとの間の正常な電気的接触が保たれているか否かの識別が困難であるという課題もあった。
【０００５】
この発明は、上述のような課題を解決するためになされたもので、クリップ端子の開口部をブスバーに嵌挿させ、圧接力によってブスバーを挟持する端子台または端子台を具備する回路遮断器において、端子台または端子台を具備する回路遮断器の取り付けを容易にすると共に、正常にブスバーに挿入されているか否かを容易に確認できるようにすることにより、クリップ端子とブスバーとの電気的接触を安定化させることを目的としている。
【０００６】
【課題を解決するための手段】
この発明に係る端子台または端子台を具備する回路遮断器は、第１の圧接片と、第２の圧接片と、前記第１の圧接片と前記第２の圧接片を連結する連結片とにより一体的に略Ｕ字形状に形成されたクリップ端子を備え、このクリップ端子の開口部をブスバーに嵌挿させて前記第１の圧接片の圧接部と前記第２の圧接片の圧接部の圧接力によって前記ブスバーを挟持する端子台または端子台を具備する回路遮断器において、前記ブスバーを挟持しないときに前記クリップ端子の開口部を所定の寸法に開口させた状態に係止するスペーサを備えたものである。
【０００７】
【発明の実施の形態】
実施の形態１．
図１はこの発明の実施の形態１における回路遮断器の一部断面側面図、図２は図１の要部拡大斜視図、図３は図１のスペーサの拡大斜視図、図４は図１のクリップ端子単体の拡大断面側面図である。
【０００８】
図１から図４において、電路（図示しない）に過電流が流れたときに周知の引き外し動作により電路を遮断する回路遮断器１００に配設された端子１０１に、端子台１の導体２をネジ１０２により固着している。
導体２にはクリップ端子３０がネジ４により固着され、このクリップ端子３０をブスバー５に嵌挿することにより回路遮断器１００は電路の電源側であるブスバー５に電気的に接続される。
【０００９】
クリップ端子３０は、第１の圧接片３１と第２の圧接片３２と第１の圧接片３３と第２の圧接片３２を連結する連結片３３とにより一体的に略Ｕ字形状に形成されており、このクリップ端子３０の開口部３４をブスバー５に嵌挿させて第１の圧接片３１の圧接部３１ａと第２の圧接片３２の圧接部３２ａの挟持力によってブスバー５を挟持する。
【００１０】
このクリップ端子３０にはブスバー５を嵌挿する前の状態において、第１の圧接片３１の圧接部３１ａと第２の圧接片３２の圧接部３２ａの圧接力に抗してクリップ端子３０の開口部３４の寸法を所定の寸法（後述の図５のＡ）に開口させた状態に係止するスペーサ６を備えており、スペーサ６の当接面６ｂが第１の圧接片３１の当接面３１ｂ及び第２の圧接片３２の当接面３２ｂに当接する。
なお、スペーサ６は例えば、黄銅やオーステナイト系のステンレス材料により形成されており、非磁性体材料で形成させることで、ブスバー５からクリップ端子３０に流れる電流による電磁力により、スペーサ６が振動して発音することを防止する。
【００１１】
第１の圧接片３１と第２の圧接片３２は開口部３４からブスバー５の嵌挿方向に向って広がるように形成されており、ブスバー５の嵌挿方向に略平行にガイド溝３６が配設され、圧接部３１ａ、圧接部３２ａにはブスバー５との接触面を半円筒形状に打出した打出し凸部３５が配設されている。なお、打出し凸部３５の形状は球面状でも良い。
【００１２】
スペーサ６には第１の圧接片３１と第２の圧接片３２に配設されたガイド溝３６に嵌挿されてブスバー５の挿入方向に摺動するガイド６ａが配設されている。
また、端子台１は、ブスバー５に嵌挿したときにブスバー５に嵌挿したことを表示する表示手段７０を具備しており、この表示手段７０は、ブスバー５に押圧されてブスバー５の押圧方向に移動するプッシュロッド７１と、このプッシュロッド７１をブスバー５の反押圧方向に付勢する押しバネ７２と、プッシュロッド７１に押圧されて突出する表示ピース７３とを備えている。
【００１３】
図５は実施の形態１における端子台をブスバーに嵌挿させるときの動作を説明する一部断面拡大図で（ａ）はブスバー嵌挿前及び嵌挿開始時（ｂ）はブスバー嵌挿後を示す。
次に、本図を用いて実施の形態１における端子台をブスバーに嵌挿させるときの動作を説明する。
【００１４】
クリップ端子３０の開口部３４がスペーサ６により所定の寸法（Ａ）に開口させられた状態で端子台１をブスバー５に対して矢印Ｂ方向に嵌挿開始すると、ブスバー５のラウンド部５ａが打出し凸部３５に当接する。
さらに端子台１を矢印Ｂ方向に嵌挿すると、第１の圧接片３１の圧接部３１ａと第２の圧接片３２の圧接部３２ａの挟持力に抗して、ラウンド部５ａが打出し凸部３５を摺動しながら端子台１はブスバー５に嵌挿される。このとき、打出し凸部３５とラウンド部５ａは半円筒形状または球面形状に形成されているのでスムーズに摺動する。
【００１５】
さらに端子台１を矢印Ｂ方向に嵌挿すると、ラウンド部５ａがスペーサ６に当接する。
さらに端子台１を矢印Ｂ方向に嵌挿すると、第１の圧接片３１と第２の圧接片３２は開口部３４からブスバー５の嵌挿方向に向って広がるように形成されているので、第１の圧接片３１の当接面３１ｂ及び第２の圧接片３２の当接面３２ｂとスペーサ６の当接面６ｂとのに当接が解除された後、スペーサ６はラウンド部５ａと一体的にブスバー５の嵌挿方向にスムーズに移動し、ブスバー５は第１の圧接片３１の圧接部３１ａと第２の圧接片３２の圧接部３２ａの挟持力により挟持される。
【００１６】
このとき、ブスバー５の板厚寸法Ｃはクリップ端子３０が単体のとき（図４に示す）の開口部３４の寸法Ｄと比較するとＤ＜Ｃであるため、端子台１はブスバー５に大きな挟持力により挟持する。
また、嵌挿時において、第１の圧接片３１と第２の圧接片３２に配設されたガイド溝３６に沿ってスペーサ６のガイド６ａが摺動するのでスペーサ６が傾くことなくスムーズに摺動する。
【００１７】
端子台１が所定の位置まで嵌挿されると、ブスバー５によりプッシュロッド７１が押しバネの付勢力に抗してブスバー５の嵌挿方向に移動し、プッシュロッド７１に押圧されて表示ピース７３が端子台１から突出する。
【００１８】
以上のように構成された端子台１は、クリップ端子３０の開口部３４の寸法がスペーサ６によって、予め、所定の寸法に開口させた状態に係止されているので、ブスバー５に端子台１を嵌挿するときの挿入抵抗を小さくすることができる。
従って、端子台１の取り付けが容易であり、無理な挿入によるクリップ端子３０の変形を抑制し、作業性が良く、信頼性の高い端子台１を得ることができる。
【００１９】
また、端子台１をブスバー５に嵌挿したとき、ブスバー５が正常な位置まで挿入された場合は、端子台１の表面から表示ピース７３が突出することで、正常に端子台１が挿入できたことを認識することができ、クリップ端子３とブスバー５との間の正常な電気的接触が保たれているか否かの識別ができる。
なお、上記実施の形態では表示手段７０の動作を直接端子台１の表面に突出させたが、別部材を設けるなどして、別の形態、例えば回路遮断器１００の表面に突出させるようにしても良い。
また、表示手段７０は、端子台１が複数極の場合はいずれかの極に１つ配設しておいても良いが、複数個配設することにより挿入に対する認識精度を向上させることができる。
【００２０】
実施の形態２．
図６は、この発明の実施の形態２における回路遮断器の一部断面側面図、図７は図６の要部拡大斜視図、図８はスペーサの拡大斜視図、図９はクリップ端子単体の拡大断面側面図、図１０は表示手段の構成を示す拡大斜視図である。
【００２１】
図において、実施の形態１と同等または相当部品については同一番号を付し説明を省略する。
第１の圧接片３１の圧接部３１ａと第２の圧接片３２の圧接部３２ａの夫々にブスバー５の挿入方向と略平行に圧接部３１ａを分割するスリット３１ｂ、圧接部３２ａを分割するスリット３２ｂが設けられ、分割された圧接部３１ａ、圧接部３２ａの夫々のブスバー５との接触面には半円筒形状または球面形状に打出した打出し凸部３５が配設されている。
【００２２】
また、圧接部３１ａ、圧接部３２ａの夫々の凸部３５の板厚方向の裏面には凹部３５ａが配設され、この凹部３５ａに略Ｃ字形状に形成された円弧バネ７の両端面が嵌挿され、第１の圧接片３１の圧接部３１ａと第２の圧接片３２の圧接部３２ａのブスバー５を挟持する挟持力をバックアップするようにしている。
なお、円弧バネ７は上述した実施の形態１にも同様に配設することができることは言うまでもない。
【００２３】
また、スペーサ６とクリップ端子３０の連結片３３との間にはブスバー５の反嵌挿方向に押圧するコイルバネ８が配設されている。
なお、このコイルバネ８による付勢力は、スペーサ６の自重よりも大きく、また、第１の圧接片３１の圧接部３１ａと第２の圧接片３２の圧接部３２ａのブスバー５を挟持する挟持力に抗してスペーサ６をブスバー５の反嵌挿方向に摺動できる値に設定されている。
【００２４】
スペーサ６には、クリップ端子３０をブスバー５に嵌挿したときにブスバー５に嵌挿したことを表示する表示手段としての表示ロッド６ｃが固着されている。
なお、この表示ロッド６ｃは、端子台１が複数極の場合はいずれかの極に１つ配設しておいても良いが、複数個配設することにより挿入に対する認識精度を向上させることができる。
【００２５】
図１１は実施の形態２における端子台をブスバーに嵌挿させるときの動作を説明する一部断面拡大図で（ａ）はブスバー嵌挿前及び嵌挿開始時（ｂ）はブスバー嵌挿後を示す。なお、図において、実施の形態１と同等または相当部品については同一番号を付し説明を省略する。
【００２６】
最初に、端子台１をブスバー５に嵌挿する場合について説明する。
クリップ端子３０の開口部３４がスペーサ６により所定の寸法（Ａ）に開口させられた状態で、端子台１をブスバー５に対して矢印Ｂ方向に嵌挿開始すると、ブスバー５のラウンド部５ａが打出し凸部３５に当接する。
【００２７】
さらに端子台１を矢印Ｂ方向に嵌挿すると、第１の圧接片３１の圧接部３１ａと第２の圧接片３２の圧接部３２ａの挟持力に抗して、ラウンド部５ａが打出し凸部３５の摺動しながら端子台１はブスバー５に嵌挿される。このとき、打出し凸部３５とラウンド部５ａは半円筒形状または球面形状に形成されているのでスムーズに摺動する。
【００２８】
さらに端子台１を矢印Ｂ方向に嵌挿すると、ラウンド部５ａがスペーサ６に当接する。
さらに端子台１を矢印Ｂ方向に嵌挿すると、第１の圧接片３１の当接面３１ｂ及び第２の圧接片３２の当接面３２ｂとスペーサ６の当接面６ｂとの当接が解除された後、スペーサ６はコイルバネ８による付勢力に抗してブスバー５のラウンド部５ａに接した状態でブスバー５の嵌挿方向にスムーズに移動し、ブスバー５は第１の圧接片３１の圧接部３１ａと第２の圧接片３２の圧接部３２ａの挟持力により挟持される。
端子台１が所定の位置まで嵌挿されると、スペーサ６に固着された表示手段である表示ロッド６ｃが端子台１から突出する。
【００２９】
以上のように構成された端子台１は、クリップ端子３０の開口部３４の寸法がスペーサ６によって、予め、所定の寸法に開口させた状態に係止されているので、ブスバー５に端子台１を嵌挿するときの挿入抵抗を小さくすることができる。
第１の圧接片３１の圧接部３１ａと第２の圧接片３２の圧接部３２ａの夫々にブスバー５の挿入方向と略平行にスリット３１ｂ，３２ｂを設けて、圧接部３１ａ，３２ａを分割しているので、分割された夫々の圧接部が別々にブスバー５を挟持するため、安定した荷重でブスバー５を挟持する。
従って、例えば、大形の端子台１または端子台を具備する回路遮断器１００であっても取り付けが容易であり、無理な挿入によるクリップ端子３０の変形を抑制し、作業性が良く、信頼性の高い端子台１を得ることができる。
【００３０】
また、端子台１をブスバー５に嵌挿したとき、ブスバー５が正常な位置まで挿入された場合は、端子台１の表面から表示手段である表示ロッド６ｃが突出することで、正常な挿入ができたことを認識することができ、クリップ端子３とブスバー５との間の正常な電気的接触が保たれているか否かの識別ができる。
以上のように、この実施の形態２における端子台１または端子台を具備する回路遮断器１００はスペーサ６に表示ロッド６ｃを固着するという簡単な構成で表示手段を形成している。
【００３１】
つぎに、端子台１をブスバー５から引出す場合について説明する。
端子台１を矢印Ｅ方向に引出すと、スペーサ６はコイルバネ８により付勢されているのでブスバー５のラウンド部５ａに接した状態でブスバー５の引出し方向にスムーズに移動した後、第１の圧接片３１の当接面３１ｂ、及び第２の圧接片３２の当接面３２ｂとスペーサ６の当接面６ｂが当接したときに、クリップ端子３０の開口部３４がスペーサ６により所定の寸法（Ａ）に開口させられた状態で係止される。
【００３２】
さらに引出すと、端子台１はラウンド部５ａが打出し凸部３５を摺動しながら移動し、端子台１はブスバー５から開離する。
このとき、クリップ端子３０の開口部３４がスペーサ６により所定の寸法（Ａ）に開口させられた状態で係止されているので、小さい引き抜き荷重で引き抜くことができる。
【００３３】
同様にして、繰り返して嵌挿、引出しする場合においても、コイルバネ８の作用によりクリップ端子３０の開口部３４がスペーサ６により所定の寸法（Ａ）に開口させられた状態で係止されるので、端子台１はブスバー５に容易に嵌挿、引出しを行なうことができる。
【００３４】
【発明の効果】
この発明は以上説明したように、第１の圧接片と、第２の圧接片と、第１の圧接片と第２の圧接片を連結する連結片とにより一体的に略Ｕ字形状に形成されたクリップ端子を備え、このクリップ端子の開口部をブスバーに嵌挿させて第１の圧接片の圧接部と第２の圧接片の圧接部の圧接力によって前記ブスバーを挟持する端子台または回路遮断器において、ブスバーを挟持しないときにクリップ端子の開口部を所定の寸法に開口させた状態に係止するスペーサを備えたので、ブスバーに端子台または回路遮断器を嵌挿するときの挿入抵抗を小さくすることができ、端子台または回路遮断器の取り付けが容易であり、無理な挿入によるクリップ端子の変形を抑制し、信頼性の高い端子台または回路遮断器を得ることができる。
【図面の簡単な説明】
【図１】この発明の実施の形態１における回路遮断器の一部断面側面図である。
【図２】この発明の実施の形態１における端子台の要部拡大斜視図である。
【図３】この発明の実施の形態１におけるスペーサの拡大斜視図である。
【図４】この発明の実施の形態１におけるクリップ端子単体の拡大断面側面図である。
【図５】この実施の形態１における端子台をブスバーに嵌挿させるときの動作を説明する一部断面拡大図で（ａ）はブスバー嵌挿前及び嵌挿開始時（ｂ）はブスバー嵌挿後を示す。
【図６】この発明の実施の形態２における回路遮断器の一部断面側面図である。
【図７】この発明の実施の形態２における端子台の要部拡大斜視図である。
【図８】この発明の実施の形態２におけるスペーサの拡大斜視図である。
【図９】この発明の実施の形態２におけるクリップ端子単体の拡大断面側面図である。
【図１０】この発明の実施の形態２における表示手段の構成を示す拡大斜視図である。
【図１１】この実施の形態２における端子台をブスバーに嵌挿させるときの動作を説明する一部断面拡大図で（ａ）はブスバー嵌挿前及び嵌挿開始時（ｂ）はブスバー嵌挿後を示す。
【符号の説明】
１ 端子台、５ ブスバー、６ スペーサ、６ａ ガイド、
６ｃ 表示ロッド（表示手段）、７ 円弧バネ、８ コイルバネ、
３０ クリップ端子、３１ 第１の圧接片、３１ａ 圧接部、
３２ 第２の圧接片、３２ａ 圧接部、３４ 開口部、３５ 打出し凸部、
３６ ガイド溝、７０ 表示手段、７１ プッシュロッド、
７２ 押しバネ、７３ 表示ピース、１００ 回路遮断器。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a plug-in type terminal block mounted on a distribution board or the like, or a circuit breaker including the terminal block.
[0002]
[Prior art]
A terminal block with a clip terminal that can be directly inserted into the bus bar for a plug-in type circuit breaker that is mounted on a conventional distribution board, etc., and cuts off the electric circuit by a well-known trip operation when an overcurrent flows in the electric circuit Is installed. This clip terminal is made of a leaf spring material such as phosphor bronze, and each is molded so as to have substantially the same beak shape, and the gap is narrowed with respect to the thickness of the bus bar so that the clip terminal can be clamped by the bus bar with a stable contact pressure. (For example, see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-2002-237248 (FIG. 3)
[0004]
[Problems to be solved by the invention]
The conventional terminal block having clip terminals is configured as described above, and there is a problem that the load for pushing and expanding the clip terminals when the terminal block is inserted into the bus bar becomes insertion resistance, resulting in poor workability. Was.
In addition, there is a problem that the clip terminal is deformed when the forcible insertion is attempted with respect to the insertion resistance.
Furthermore, in the case of a large circuit breaker having a large insertion force, when the circuit breaker is mounted, the mounting plate on which the circuit breaker is mounted may be deformed, and a normal electrical connection between the clip terminal and the bus bar may be caused. There is also a problem that it is difficult to identify whether or not a close contact is maintained.
[0005]
The present invention has been made in order to solve the above-described problems. In a circuit breaker including a terminal block or a terminal block that inserts an opening of a clip terminal into a bus bar and clamps the bus bar by a press-contact force. By making it easy to attach the terminal block or the circuit breaker having the terminal block and making it easy to confirm whether or not the terminal block is normally inserted into the bus bar, the electrical contact between the clip terminal and the bus bar can be made. The purpose is to stabilize.
[0006]
[Means for Solving the Problems]
A terminal block or a circuit breaker including the terminal block according to the present invention includes a first pressure contact piece, a second pressure contact piece, and a connection piece that connects the first pressure contact piece and the second pressure contact piece. And a clip terminal integrally formed in a substantially U-shape by inserting an opening of the clip terminal into a bus bar to form a press contact portion of the first press contact piece and a press contact portion of the second press contact piece. In a terminal block or a circuit breaker including a terminal block, which clamps the bus bar by a pressure contact force, the circuit breaker includes a spacer which locks the clip terminal in a state where the opening of the clip terminal is opened to a predetermined size when the bus bar is not clamped. It is a thing.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiment 1 FIG.
1 is a partial cross-sectional side view of a circuit breaker according to Embodiment 1 of the present invention, FIG. 2 is an enlarged perspective view of a main part of FIG. 1, FIG. 3 is an enlarged perspective view of a spacer of FIG. 1, and FIG. FIG. 4 is an enlarged sectional side view of the clip terminal alone.
[0008]
1 to 4, the conductor 2 of the terminal block 1 is connected to a terminal 101 provided in a circuit breaker 100 that cuts off the electric circuit by a known tripping operation when an overcurrent flows in an electric circuit (not shown). It is fixed by screws 102.
A clip terminal 30 is fixed to the conductor 2 with a screw 4, and the circuit breaker 100 is electrically connected to the bus bar 5 on the power supply side of the electric circuit by fitting the clip terminal 30 into the bus bar 5.
[0009]
The clip terminal 30 is integrally formed in a substantially U-shape by a first pressure contact piece 31, a second pressure contact piece 32, and a connection piece 33 connecting the first pressure contact piece 33 and the second pressure contact piece 32. The opening 34 of the clip terminal 30 is inserted into the bus bar 5 so that the bus bar 5 is clamped by the clamping force between the pressure contact portion 31a of the first pressure contact piece 31 and the pressure contact portion 32a of the second pressure contact piece 32.
[0010]
Before the bus bar 5 is inserted into the clip terminal 30, the opening of the clip terminal 30 against the pressing force of the pressing portion 31 a of the first pressing member 31 and the pressing portion 32 a of the second pressing member 32. The spacer 6 is provided so that the dimension of the portion 34 is locked to be opened to a predetermined dimension (A in FIG. 5 described later), and the contact surface 6 b of the spacer 6 is in contact with the contact surface of the first pressure contact piece 31. 31b and the contact surface 32b of the second pressure contact piece 32.
The spacer 6 is made of, for example, brass or an austenitic stainless material, and is made of a non-magnetic material so that the spacer 6 vibrates due to an electromagnetic force caused by a current flowing from the bus bar 5 to the clip terminal 30. Prevent pronunciation.
[0011]
The first pressure contact piece 31 and the second pressure contact piece 32 are formed so as to extend from the opening 34 in the insertion direction of the bus bar 5, and the guide groove 36 is disposed substantially parallel to the insertion direction of the bus bar 5. The protrusions 35 are formed on the press contact portions 31a and 32a, and the contact surfaces with the bus bar 5 are formed in a semi-cylindrical shape. The shape of the projection 35 may be spherical.
[0012]
The spacer 6 is provided with a guide 6 a which is inserted into a guide groove 36 provided in the first press contact piece 31 and the second press contact piece 32 and slides in the insertion direction of the bus bar 5.
Further, the terminal block 1 is provided with display means 70 for displaying that the bus bar 5 has been inserted when the terminal block 1 is inserted into the bus bar 5, and the display means 70 is pressed by the bus bar 5 to press the bus bar 5. A push rod 71 that moves in the direction, a push spring 72 that urges the push rod 71 in a direction opposite to the pushing direction of the bus bar 5, and a display piece 73 that is pushed and protruded by the push rod 71 are provided.
[0013]
5A and 5B are partially enlarged cross-sectional views illustrating the operation when the terminal block according to the first embodiment is inserted into the bus bar. FIG. 5A illustrates the state before the bus bar is inserted and the state at the start of the insertion, and FIG. Show.
Next, the operation when the terminal block according to the first embodiment is inserted into the bus bar will be described with reference to FIG.
[0014]
When the terminal block 1 is inserted into the bus bar 5 in the direction of arrow B in a state where the opening 34 of the clip terminal 30 is opened to a predetermined size (A) by the spacer 6, the round portion 5a of the bus bar 5 is punched out. And comes into contact with the convex portion 35.
When the terminal block 1 is further inserted in the direction of the arrow B, the round portion 5a is pressed against the pressing portion 31a of the first pressing portion 31 and the pressing portion 32a of the second pressing portion 32 to form the convex portion. The terminal block 1 is inserted into the bus bar 5 while sliding on 35. At this time, the projection 35 and the round portion 5a are formed in a semi-cylindrical or spherical shape, so that they slide smoothly.
[0015]
When the terminal block 1 is further inserted in the direction of arrow B, the round portion 5 a comes into contact with the spacer 6.
When the terminal block 1 is further inserted in the direction of arrow B, the first pressure contact piece 31 and the second pressure contact piece 32 are formed so as to expand from the opening 34 in the bus bar 5 insertion direction. After the contact between the contact surface 31b of the first contact piece 31 and the contact surface 32b of the second contact piece 32 and the contact surface 6b of the spacer 6 is released, the spacer 6 is integrated with the round portion 5a. The bus bar 5 is smoothly moved in the insertion direction of the bus bar 5, and the bus bar 5 is held by the holding force of the pressing portion 31a of the first pressing member 31 and the pressing portion 32a of the second pressing member 32.
[0016]
At this time, since the plate thickness dimension C of the bus bar 5 is smaller than the dimension D of the opening portion 34 when the clip terminal 30 is a single piece (shown in FIG. 4), D <C, so that the terminal block 1 is largely held by the bus bar 5. Hold by force.
Further, at the time of insertion, the guide 6a of the spacer 6 slides along the guide groove 36 provided on the first pressure contact piece 31 and the second pressure contact piece 32, so that the spacer 6 slides smoothly without tilting. Move.
[0017]
When the terminal block 1 is inserted to a predetermined position, the push rod 71 is moved by the bus bar 5 in the insertion direction of the bus bar 5 against the urging force of the pressing spring, and is pushed by the push rod 71 to push the display piece 73. It protrudes from the terminal block 1.
[0018]
In the terminal block 1 configured as described above, the dimensions of the opening portion 34 of the clip terminal 30 are locked by the spacer 6 in a state where the clip section 30 is previously opened to a predetermined dimension. Can be reduced when inserting.
Therefore, the terminal block 1 can be easily attached, the deformation of the clip terminal 30 due to excessive insertion is suppressed, and the terminal block 1 with good workability and high reliability can be obtained.
[0019]
When the bus bar 5 is inserted to a normal position when the terminal block 1 is inserted into the bus bar 5, the display piece 73 protrudes from the surface of the terminal block 1, so that the terminal block 1 can be inserted normally. It can be recognized that normal electrical contact between the clip terminal 3 and the bus bar 5 is maintained.
In the above embodiment, the operation of the display means 70 is directly projected on the surface of the terminal block 1. However, another member, for example, is provided so as to project on the surface of the circuit breaker 100. Is also good.
Further, when the terminal block 1 has a plurality of poles, one of the display means 70 may be provided at any one of the poles. However, by providing a plurality of the poles, the recognition accuracy for insertion can be improved. .
[0020]
Embodiment 2 FIG.
6 is a partial sectional side view of a circuit breaker according to Embodiment 2 of the present invention, FIG. 7 is an enlarged perspective view of a main part of FIG. 6, FIG. 8 is an enlarged perspective view of a spacer, and FIG. FIG. 10 is an enlarged perspective view showing the configuration of the display means.
[0021]
In the figure, parts that are the same as or equivalent to those in Embodiment 1 are given the same numbers, and descriptions thereof are omitted.
A slit 31b for dividing the press contact portion 31a into the press contact portion 31a of the first press contact piece 31 and a press contact portion 32a of the second press contact piece 32 substantially in parallel with the insertion direction of the bus bar 5, and a slit 32b for dividing the press contact portion 32a. Are provided on the contact surfaces of the divided press-contact portions 31a and the press-contact portions 32a with the bus bars 5, and a protrusion 35 formed in a semi-cylindrical shape or a spherical shape is provided.
[0022]
A concave portion 35a is provided on the back surface of each of the convex portions 35 of the press-contact portion 31a and the press-contact portion 32a in the plate thickness direction, and both end surfaces of the substantially C-shaped arc spring 7 are fitted into the concave portion 35a. It is inserted to back up the clamping force for clamping the bus bar 5 of the press contact portion 31a of the first press contact piece 31 and the press contact portion 32a of the second press contact piece 32.
Needless to say, the arc spring 7 can be similarly arranged in the first embodiment.
[0023]
A coil spring 8 is disposed between the spacer 6 and the connecting piece 33 of the clip terminal 30 for pressing the bus bar 5 in the direction opposite to the insertion.
Note that the urging force of the coil spring 8 is larger than the weight of the spacer 6, and is smaller than the holding force for holding the bus bar 5 between the press contact portion 31 a of the first press contact piece 31 and the press contact portion 32 a of the second press contact piece 32. The spacer 6 is set to a value that allows the spacer 6 to slide in the direction opposite to the insertion of the bus bar 5.
[0024]
A display rod 6c as display means for displaying that the clip terminal 30 has been inserted into the bus bar 5 when the clip terminal 30 is inserted into the bus bar 5 is fixed to the spacer 6.
When the terminal block 1 has a plurality of poles, one of the display rods 6c may be disposed on any one of the poles. However, by disposing a plurality of the poles, the recognition accuracy for insertion can be improved. it can.
[0025]
11A and 11B are partially enlarged cross-sectional views illustrating the operation when the terminal block according to the second embodiment is inserted into the bus bar. FIG. 11A shows the state before the bus bar is inserted and the state at the start of the insertion, and FIG. Show. In the drawings, parts that are the same as or equivalent to those in Embodiment 1 are given the same numbers, and descriptions thereof are omitted.
[0026]
First, a case where the terminal block 1 is inserted into the bus bar 5 will be described.
When the terminal block 1 is inserted into the bus bar 5 in the direction of arrow B in a state where the opening 34 of the clip terminal 30 is opened to a predetermined size (A) by the spacer 6, the round portion 5a of the bus bar 5 is It comes into contact with the projection 35.
[0027]
Further, when the terminal block 1 is inserted in the direction of arrow B, the round portion 5a is pressed against the pressing portion 31a of the first pressing portion 31 and the pressing portion 32a of the second pressing portion 32 to form the projecting protrusion. The terminal block 1 is inserted into the bus bar 5 while sliding 35. At this time, the projection 35 and the round portion 5a are formed in a semi-cylindrical or spherical shape, so that they slide smoothly.
[0028]
When the terminal block 1 is further inserted in the direction of arrow B, the round portion 5 a comes into contact with the spacer 6.
When the terminal block 1 is further inserted in the direction of arrow B, the contact between the contact surface 31b of the first pressure contact piece 31 and the contact surface 32b of the second pressure contact piece 32 and the contact surface 6b of the spacer 6 is released. After that, the spacer 6 moves smoothly in the insertion direction of the bus bar 5 in a state of being in contact with the round portion 5 a of the bus bar 5 against the urging force of the coil spring 8, and the bus bar 5 is pressed against the first pressure contact piece 31. The portion 31a and the second pressure contact piece 32 are pinched by the pinching force of the pressure contact portion 32a.
When the terminal block 1 is inserted to a predetermined position, the display rod 6c as display means fixed to the spacer 6 projects from the terminal block 1.
[0029]
In the terminal block 1 configured as described above, the dimensions of the opening portion 34 of the clip terminal 30 are locked by the spacer 6 in a state where the clip section 30 is previously opened to a predetermined dimension. Can be reduced when inserting.
Slits 31b and 32b are provided in the press contact portion 31a of the first press contact piece 31 and the press contact portion 32a of the second press contact piece 32 substantially in parallel with the insertion direction of the bus bar 5, and the press contact portions 31a and 32a are divided. Therefore, each of the divided pressure contact portions separately holds the bus bar 5, and therefore holds the bus bar 5 with a stable load.
Therefore, for example, even the large terminal block 1 or the circuit breaker 100 having the terminal block can be easily attached, the deformation of the clip terminal 30 due to excessive insertion is suppressed, the workability is good, and the reliability is high. Terminal block 1 having a high height can be obtained.
[0030]
When the terminal block 1 is inserted into the bus bar 5 and the bus bar 5 is inserted to a normal position, the display rod 6c as a display means protrudes from the surface of the terminal block 1 so that normal insertion is possible. It is possible to recognize that the connection has been made, and to determine whether or not normal electrical contact between the clip terminal 3 and the bus bar 5 is maintained.
As described above, the terminal block 1 or the circuit breaker 100 including the terminal block according to the second embodiment forms the display means with a simple configuration in which the display rod 6c is fixed to the spacer 6.
[0031]
Next, a case where the terminal block 1 is pulled out from the bus bar 5 will be described.
When the terminal block 1 is pulled out in the direction of arrow E, the spacer 6 is urged by the coil spring 8 so that the spacer 6 smoothly moves in the drawing direction of the bus bar 5 in contact with the round portion 5a of the bus bar 5, and then the first pressure contact is performed. When the contact surface 31b of the piece 31 and the contact surface 32b of the second pressure contact piece 32 and the contact surface 6b of the spacer 6 are in contact with each other, the opening portion 34 of the clip terminal 30 has a predetermined size ( It is locked in the state opened in A).
[0032]
When the terminal block 1 is further pulled out, the terminal block 1 moves while the round portion 5 a slides on the embossing projection 35, and the terminal block 1 is separated from the bus bar 5.
At this time, since the opening 34 of the clip terminal 30 is locked in a state of being opened to a predetermined size (A) by the spacer 6, the clip terminal 30 can be pulled out with a small pulling load.
[0033]
Similarly, even when repeatedly inserting and pulling out, the opening portion 34 of the clip terminal 30 is locked by the spacer 6 so as to be opened to a predetermined size (A) by the action of the coil spring 8, The terminal block 1 can be easily inserted into and pulled out from the bus bar 5.
[0034]
【The invention's effect】
As described above, the present invention integrally forms a substantially U-shape with the first press contact piece, the second press contact piece, and the connecting piece connecting the first press contact piece and the second press contact piece. A terminal block or a circuit for holding an opening of the clip terminal in a bus bar, and holding the bus bar by a pressing force of a pressing portion of a first pressing member and a pressing portion of a second pressing member. The circuit breaker is provided with a spacer that locks the opening of the clip terminal to a predetermined size when the bus bar is not clamped, so that the insertion resistance when the terminal block or the circuit breaker is inserted into the bus bar. Can be reduced, the terminal block or the circuit breaker can be easily attached, the deformation of the clip terminal due to excessive insertion can be suppressed, and a highly reliable terminal block or circuit breaker can be obtained.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional side view of a circuit breaker according to Embodiment 1 of the present invention.
FIG. 2 is an enlarged perspective view of a main part of the terminal block according to Embodiment 1 of the present invention.
FIG. 3 is an enlarged perspective view of a spacer according to Embodiment 1 of the present invention.
FIG. 4 is an enlarged sectional side view of a single clip terminal according to the first embodiment of the present invention.
FIGS. 5A and 5B are partially enlarged cross-sectional views illustrating an operation when the terminal block according to the first embodiment is inserted into a bus bar; FIG. 5A is a bus bar insertion state before and at the start of insertion of the bus bar; Show later.
FIG. 6 is a partial cross-sectional side view of a circuit breaker according to Embodiment 2 of the present invention.
FIG. 7 is an enlarged perspective view of a main part of a terminal block according to Embodiment 2 of the present invention.
FIG. 8 is an enlarged perspective view of a spacer according to Embodiment 2 of the present invention.
FIG. 9 is an enlarged sectional side view of a single clip terminal according to Embodiment 2 of the present invention.
FIG. 10 is an enlarged perspective view showing a configuration of a display means according to Embodiment 2 of the present invention.
FIGS. 11A and 11B are partially enlarged cross-sectional views illustrating an operation when the terminal block according to the second embodiment is inserted into a busbar; FIG. 11A is a busbar insertion state before and at the start of insertion of the busbar; Show later.
[Explanation of symbols]
1 terminal block, 5 busbar, 6 spacer, 6a guide,
6c display rod (display means), 7 arc spring, 8 coil spring,
30 clip terminal, 31 first pressure contact piece, 31a pressure contact portion,
32 second pressure contact piece, 32a pressure contact part, 34 opening, 35 embossing projection,
36 guide groove, 70 display means, 71 push rod,
72 push spring, 73 display piece, 100 circuit breaker.

Claims (12)

第１の圧接片と、第２の圧接片と、前記第１の圧接片と前記第２の圧接片を連結する連結片とにより一体的に略Ｕ字形状に形成されたクリップ端子を備え、このクリップ端子の開口部にブスバーを嵌挿させて前記第１の圧接片の圧接部と前記第２の圧接片の圧接部の圧接力によって前記ブスバーを挟持する端子台において、
前記ブスバーを挟持しないときに前記クリップ端子の開口部を所定の寸法に開口させた状態に係止するスペーサを備えたことを特徴とする端子台。A clip terminal integrally formed in a substantially U-shape by a first press contact piece, a second press contact piece, and a connecting piece that connects the first press contact piece and the second press contact piece; In the terminal block, a bus bar is inserted into the opening of the clip terminal, and the bus bar is sandwiched by a pressing force of a pressing portion of the first pressing member and a pressing portion of the second pressing member.
A terminal block comprising: a spacer for locking the opening of the clip terminal to a predetermined size when the bus bar is not clamped. 第１の圧接片の圧接部と第２の圧接片の圧接部の夫々にブスバーの嵌挿方向と略平行に前記圧接部を分割するスリットを設けたことを特徴とする請求項１に記載の端子台。2. The slit according to claim 1, wherein a slit is provided in each of the press-contact portion of the first press-contact piece and the press-contact portion of the second press-contact piece to divide the press-contact portion substantially in parallel with the busbar insertion direction. 3. Terminal block. 第１の圧接片と第２の圧接片はブスバーとの接触部からブスバーの嵌挿方向に向って広がるように形成されていることを特徴とする請求項１または請求項２記載の端子台。The terminal block according to claim 1, wherein the first and second press contact pieces are formed so as to expand from a contact portion with the bus bar in a direction in which the bus bar is inserted. 第１の圧接片の圧接部と第２の圧接片の圧接部のブスバーとの接触部に打出し凸部を配設したことを特徴とする請求項１から請求項３のいずれか１項に記載の端子台。4. The projection according to claim 1, wherein a projection is provided at a contact portion between the press contact portion of the first press contact piece and the bus bar of the press contact portion of the second press contact piece. 5. The terminal block described. ブスバーを挟持する方向に打出し凸部を付勢する円弧バネを配設したことを特徴とする請求項４に記載の端子台。5. The terminal block according to claim 4, wherein an arc spring for urging the embossed protrusion in a direction to clamp the bus bar is provided. 第１の圧接片と第２の圧接片にブスバーの嵌挿方向に略平行にガイド溝を配設すると共に、スペーサに前記ガイド溝に嵌挿されて前記ブスバー挿入方向に摺動するガイドを配設したことを特徴とする請求項１から請求項５のいずれか１項に記載の端子台。A guide groove is disposed on the first and second pressure contact pieces substantially parallel to the bus bar insertion direction, and a guide that is inserted into the guide groove and slides in the bus bar insertion direction is disposed on a spacer. The terminal block according to any one of claims 1 to 5, wherein the terminal block is provided. スペーサをブスバーの反嵌挿方向に押圧するコイルバネを配設したことを特徴とする請求項１から請求項６のいずれか１項に記載の端子台。The terminal block according to any one of claims 1 to 6, further comprising a coil spring that presses the spacer in a direction opposite to the bus bar. スペーサを非磁性材料で形成させたことを特徴とする請求項１から請求項７のいずれか１項に記載の端子台。The terminal block according to any one of claims 1 to 7, wherein the spacer is formed of a non-magnetic material. 端子台にブスバーに嵌挿されたことを表示する表示手段を前記端子台に備えたことを特徴とする請求項１から請求項８のいずれか１項に記載の端子台。The terminal block according to any one of claims 1 to 8, wherein the terminal block includes a display unit that indicates that the terminal block has been fitted into the bus bar. 表示手段は、ブスバーに押圧されてブスバーの押圧方向に移動するプッシュロッドと、このプッシュロッドを前記ブスバーの反押圧方向に付勢する押しバネと、前記プッシュロッドに押圧されて突出する表示ピースとにより構成されることを特徴とする請求項９に記載の端子台。The display means is a push rod that is pressed by the bus bar and moves in the pressing direction of the bus bar, a push spring that urges the push rod in the opposite pressing direction of the bus bar, and a display piece that is pressed and protruded by the push rod. The terminal block according to claim 9, wherein: 表示手段は、スペーサに固着されこのスペーサと一体的に移動する表示ロッドであることを特徴とする請求項９に記載の端子台。The terminal block according to claim 9, wherein the display means is a display rod fixed to the spacer and moved integrally with the spacer. 請求項１から請求項１１のいずれか１項に記載の端子台を具備する回路遮断器。A circuit breaker comprising the terminal block according to any one of claims 1 to 11.
JP2003163381A 2003-06-09 2003-06-09 Terminal block and circuit breaker Expired - Fee Related JP4020026B2 (en)

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JPS402588Y1 (en) * 1964-06-05 1965-01-25
JPS5243694U (en) * 1975-09-25 1977-03-28
JPS55163783A (en) * 1979-06-06 1980-12-20 Hitachi Ltd Multiiterminal connector
JPS56136480A (en) * 1980-03-03 1981-10-24 Amp Inc Zero insertion and removal force edge connector for substrate
JPS5931775U (en) * 1982-08-24 1984-02-28 日本電気株式会社 Structure of connector
JPH0523464U (en) * 1991-09-10 1993-03-26 日本電気株式会社 PCB connector
JPH0523434U (en) * 1991-09-05 1993-03-26 日本電気株式会社 connector
JPH0742078U (en) * 1993-12-27 1995-07-21 矢崎総業株式会社 Connector inspection tool
JPH11204225A (en) * 1998-01-08 1999-07-30 Sumitomo Wiring Syst Ltd Connector inspection jig
JP2001006764A (en) * 1999-06-17 2001-01-12 Yazaki Corp Terminal hardware
JP2001006765A (en) * 1999-06-17 2001-01-12 Yazaki Corp Terminal hardware
JP2002237248A (en) * 2001-02-08 2002-08-23 Toshiba Lighting & Technology Corp Plug-in terminal device and distribution board

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS402588Y1 (en) * 1964-06-05 1965-01-25
JPS5243694U (en) * 1975-09-25 1977-03-28
JPS55163783A (en) * 1979-06-06 1980-12-20 Hitachi Ltd Multiiterminal connector
JPS56136480A (en) * 1980-03-03 1981-10-24 Amp Inc Zero insertion and removal force edge connector for substrate
JPS5931775U (en) * 1982-08-24 1984-02-28 日本電気株式会社 Structure of connector
JPH0523434U (en) * 1991-09-05 1993-03-26 日本電気株式会社 connector
JPH0523464U (en) * 1991-09-10 1993-03-26 日本電気株式会社 PCB connector
JPH0742078U (en) * 1993-12-27 1995-07-21 矢崎総業株式会社 Connector inspection tool
JPH11204225A (en) * 1998-01-08 1999-07-30 Sumitomo Wiring Syst Ltd Connector inspection jig
JP2001006764A (en) * 1999-06-17 2001-01-12 Yazaki Corp Terminal hardware
JP2001006765A (en) * 1999-06-17 2001-01-12 Yazaki Corp Terminal hardware
JP2002237248A (en) * 2001-02-08 2002-08-23 Toshiba Lighting & Technology Corp Plug-in terminal device and distribution board

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