JP3617106B2

JP3617106B2 - Magnetic contactor with surge absorber

Info

Publication number: JP3617106B2
Application number: JP05925395A
Authority: JP
Inventors: 文夫田中; 祐嗣佐古
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 1995-03-17
Filing date: 1995-03-17
Publication date: 2005-02-02
Anticipated expiration: 2020-02-02
Also published as: JPH08255542A

Description

【０００１】
【産業上の利用分野】
この発明は電磁接触器の接点機構を開閉した際に該接点間に発生するアークを抑制するサージ吸収器を取り付けたサージ吸収器付き電磁接触器の改良に関するものである。
【０００２】
【従来の技術】
図７及び図８は実開平２−７４７４３号公報に開示されているサージ吸収器付き電磁接触器である。図７において、１０はサージ吸収素子を内蔵したサージ吸収器で、このサージ吸収器１０はサージ吸収素子が収納されたケース１１とベース１２とから成っている。ベース１２の下部には凹所１２ａが形成され、この凹所１２ａの両側壁にはそれぞれ内側に突出する４個の爪部１２ｂ〜１２ｅが形成されている。ベース１２の凹所１２ａの略中央部には凹所１２ａ底面から垂直に支持板１２ｆが植設され、この支持板１２ｆには支持板１２ｆに対して垂直に弾性を有する舌片部１２ｇが設けられている。この舌片部１２ｇには電磁接触器５０の上面のはめ合い部５２ｅ（図８参照）に係合する突起部１２ｈが設けられている。なお、１４はデルタ結線のそれぞれの頂点に接続されたリード線で、１５はリード線１４の先端に接続された端子である。
【０００３】
図８において、電磁接触器５０はベース５１とケース５２からなり、ベース５１には固定鉄心及び固定鉄心に巻回された電磁コイルと、この電磁コイルへの通電により固定鉄心に吸引される可動体５９である可動鉄心が収納されている。なお、ケース５２内には可動鉄心に連結された可動接触子支え、接点機構部が収納されている。ケース５２の上面には４個の鈎状係合部５２ａ〜５２ｄが形成され、可動体５９の上部が僅かにケース５２の表面から突出されている。また、ケース５２の上面には角穴からなるはめ合い部５２ｅが形成されている。なお、５２ｆは電線の端子が接続される端子部である。
【０００４】
サージ吸収器１０の電磁接触器５０への取付について説明する。図８に示す状態で電磁接触器５０が制御盤等に取り付けられているとすると、サージ吸収器１０の底面を電磁接触器５０の上面に対向させ、サージ吸収器１０をスライドさせて、サージ吸収器１０の爪部１２ｂ〜１２ｅが電磁接触器５０上面の鈎状係合部５２ａ〜５２ｄに圧入される。この圧入によりサージ吸収器１０の舌片部１２ｇが電磁接触器５０のはめあい部５２ｅに嵌合される。これによりサージ吸収器１０が電磁接触器５０に取り付けられ、ロックされる。この状態からサージ吸収器１０の端子１５を電磁接触器５０の端子部５２ｆに配線する。
【０００５】
【発明が解決しようとする課題】
従来、上記のようにサージ吸収器１０を電磁接触器５０に取り付けていたので、既に、端子部５２ｆに外部電線の端子が配線されている場合、サージ吸収器１０の端子１５を該端子部５２ｆに配線するには端子部５２ｆのネジを取り外し、端子１５を該端子部５２ｆに接続した後、再度、ネジを締めなければならないので、作業が繁雑であった。また、電磁接触器５０の端子部５２ｆに外部電線の端子が複数配線されている場合、端子部５２ｆの接続端子数の制限等によりサージ吸収器１０の端子１５を端子部５２ｆへ配線することが困難であるという第１の問題点がある。
【０００６】
また、電磁接触器５０の表面にサージ吸収器１０が取付けられた場合、サージ吸収器１０により可動体５９が覆われるので、電磁接触器５０のオン・オフの動作を可動体５９によって確認することが困難になるという第２の問題点がある。
【０００７】
この発明の第１の目的は上記第１の問題点を解決するためになされたもので、サージ吸収器と電磁接触器の配線を簡易にし、電磁接触器が配線されていても容易にサージ吸収器の配線ができるサージ吸収器付き電磁接触器を提供することにある。
【０００８】
また、この発明の第２の目的は上記第２の問題点を解決するためになされたもので、サージ吸収器を電磁接触器に装着した状態において、電磁接触器の動作状態の確認ができるサージ吸収器付き電磁接触器を提供することにある。
【０００９】
【課題を解決するための手段】
第１の発明に係るサージ吸収器付き電磁接触器は、サージ吸収素子を内蔵したサージ吸収器を電磁接触器の表面に取付けると共に、上記サージ吸収素子と上記電磁接触器の端子ネジを電気的に接続するサージ吸収器付き電磁接触器において、上記サージ吸収素子に電気的に接続された導電性の押圧部材と、上記押圧部材に固定された導電性の弾性体と、上記弾性体に押圧されると共に、上記電磁接触器の端子ネジの頭部を押圧する導電性の充電部材と、上記サージ吸収器には上記押圧部材が固定される固定部を設けると共に、上記サージ吸収器を上記電磁接触器の表面に取付けた状態において、上記電磁接触器の端子ネジの略中心と一致する位置に上記弾性体及び上記充電部材を挿入する孔とを備え、上記弾性体が固定された上記押圧部材及び上記充電部材を上記孔に挿入すると共に、上記固定部に上記押圧部材を固定することを特徴とするものである。
【００１１】
第２の発明に係るサージ吸収器付き電磁接触器は、上記弾性体はコイル状のバネであり、上記押圧部材は板状であると共に、上記バネを嵌合させる溝部を備えたことを特徴とするものである。
【００１３】
第３の発明に係るサージ吸収器付き電磁接触器は、上記サージ吸収器には上記電磁接触器の可動接点を駆動する可動体の上部を覆わないように中空部を設けたことを特徴とするものである。
【００１４】
【作用】
第１の発明に係るサージ吸収器付き電磁接触器によれば、導電性の押圧部材はサージ吸収素子に電気的に接続され、導電性の弾性体は上記押圧部材に固定され、導電性の充電部材は上記弾性体に押圧されると共に、上記電磁接触器の端子ネジの頭部を押圧し、上記サージ吸収器の固定部は上記押圧部材が固定し、上記サージ吸収器の孔は上記サージ吸収器を上記電磁接触器の表面に取付けた状態において、上記電磁接触器の端子ネジの略中心と一致する位置に上記弾性体及び上記充電部材を挿入する。
【００１６】
第２の発明に係るサージ吸収器付き電磁接触器によれば、板状の押圧部材の溝部にコイル状のバネを嵌合させる。
【００１８】
第３の発明に係るサージ吸収器付き電磁接触器によれば、サージ吸収器の中空部は電磁接触器の接点機構を駆動する可動体上部を露出する。
【００１９】
【実施例】
実施例１．
この発明の実施例を図１〜図４を参照して説明する。図１において、電磁接触器の本体１５８には端子ネジ２０６が接続され、この本体１５８の上面にはサージ吸収器１００との第２の連結部１５１を備え、第２の連結部１５１には２対の対向した逆Ｌ型片１５１ａを設け、中央部を切り欠いた１対の対向した切欠き部１５１ｂとを設けている。なお、可動体１５９は本体１５８の内部の可動鉄心と連動して上下動自在な構成になっている。
【００２０】
図４において、１００はサージ吸収器で、このサージ吸収器１００はケース１０１とベース１０２が一体と成っている。このケース１０１には注形樹脂１１５により封止されたプリント基板１１３が収納されている。なお、プリント基板１１３は抵抗Ｒ及びコンデンサＣの直列回路からなる３個のサージ吸収素子をデルタ結線して接続され、それぞれの３つの結合部にはリード線１１４が接続されている。なお、１１０は端子ネジ２０６を固定する固定端子で、この固定端子１１０の先端には接点１１０ａが固定されている。また、１１１ａは接点１１０ａと開閉動作する可動接点である。
【００２１】
図２において、サージ吸収器１００のベース１０２には底面が四角形に切り欠かれた切欠き部１０２ｂが設けられ、この切欠き部１０２ｂの中央部に貫通された中空部１０２ｅが形成されている。さらに、ベース１０２の底面には切り欠き部１０２ｂの側面に後述する継手部材１９０の水平案内部１９２をスライドさせる一対の凹状の水平レール部１０６が設けられており、この水平レール部１０６に近接して垂直に後述する継手部材１９０の垂直案内部１９１をスライドさせる一対の凹状の垂直レール部１０５が設けられている。水平レール部１０６の下面部１０６ｃには円弧状の第２の突起１０７が設けられていて、この第２の突起１０７の一端に垂直面１０７ａが形成されている。さらに、この下面部１０６ｃの奥の端部には傾斜した第２の傾斜部１０８が設けられている。また、両垂直レール部１０５を結合する橋絡部１０９の中央下部に四角形の凹部１０９ａを設けていて、この凹部１０９ａにははめ合い部１０９ｂが設けられている。また、ベース１０２の底面部には僅かに突出し、各々が均一な高さで形成される４個の突起１０２ｚが形成されている。なお、この実施例では水平レール部１０６及び垂直レール部１０５が案内受け部を構成するが、どちらか一方が案内受け部でも良い。
【００２２】
図１において、３本のリード線１１４の端末には導電性の材料からなる押圧部材２０１がそれぞれ接続されている。この押圧部材２０１は導電性の材料からなる弾性体としてのコイル状のバネ２０３の内径部に嵌合して係止するための溝部２０１ａを設け、この押圧部材２０１の溝部２０１ａから先端にはバネ２０３に嵌入する先端部２０１ｂが設けられている。なお、押圧部材２０１の形状は板状である必要はなく、例えば、棒状でも良いが押圧部材２０１の相互間の絶縁距離を確保するために板状が望ましい。なお、バネ２０３の一端は頭部２０４ａを有する充電部材としての接触ピン２０４を押圧するために、この頭部２０４ａの外径よりもバネ２０３の外径が小さく成っている。
【００２３】
また、ベース１０２には押圧部材２０１及びバネ２０３、接触ピン２０４が挿入される穿設された孔１０３が設けられており、この孔１０３の先端部には接触ピン２０４を孔１０３に挿入後に、接触ピン２０４が横方向へずれることを防止する機能を有する筒状の案内部１０４を設けている。さらに、サージ吸収器１００を電磁接触器の本体１５８の表面に取付けた状態において、この孔１０３は本体１５８の端子ねじ２０６の頭部の中心と一致するように穿設されている。
【００２４】
孔１０３の挿入口には押圧部材２０１をベース１０２に圧入して嵌合するための板状の固定部としての溝部１０２ｃが形成されており、この孔１０３の近傍には押圧部材２０１の相互間の絶縁を確保するバリア１０２ｄが形成されている。なお、ケース１０１には側面部の４箇所に穿設された孔１０１ａと、ベース１０２には孔１０１ａに嵌合させる鎌状の突起１０２ａを設けている。
【００２５】
図２において、１９０は継手部材で、この継手部材１９０はサージ吸収器１００と本体１５８を結合させる仲介をする機能を有するものであり、サージ吸収器１００に継手部材１９０が圧入された後、継手部材１９０を本体１５８にスライドして強固に固定するものである。
【００２６】
継手部材１９０は略コの字状をしており、継手部材１９０は下面の両端に本体１５８の第２の連結部１５１と結合されるＬ字型の一対の対向した第１の連結部１９６が設けられ、この第１の連結部１９６は一端には一対の対向したＬ型部１９６ａと、同様に他端には２つの切り欠き１９６ｂにより形成された一対の対向したＬ型部１９６ｃと、中央部には切り欠いた１対の対向した切欠き部１９６ｄとが形成されている。継手部材１９０の両側面にベース１０２の水平レール部１０６に摺動結合させる板状の一対の水平案内部１９２を設けている。継手部材１９０の上部には、ベース１０２の垂直レール部１０９に摺動結合させる板状の一対の垂直案内部１９１を設けている。この水平案内部１９２の前面側の端には２段に形成された第１の傾斜部１９３ａ、１９３ｂが設けられている。なお、この実施例では水平案内部１９２及び垂直案内部１９１が案内部を構成するが、どちらか一方が案内部でも良い。また、第１の傾斜部１９３ａ、１９３ｂと２段に形成されているが、傾斜部１９３ａ、１９３ｂのいづれか１段でも良い。
【００２７】
また、水平案内部１９２の側面に円弧状の滑らかな面で形成されている抜け止めの機能を有する一対の第１の突起１９４が設けられていて、この第１の突起１９４の一端に垂直面１９４ａが形成されている。さらに、水平案内部１９２には長方形状の穿設された一対の孔１９５を設け、この孔１９５によって水平案内部１９２の側面が押圧されることにより弾性変形可能となっている。両水平案内部１９２を橋絡する橋絡部１９８が設けられており、この橋絡部１９８には中央に突起１９８ａを設けていて、この突起１９８ａの奥にベース１０２のはめ合い部１０９ｂに嵌合される四角形の突起１９８ｂが設けられている。
【００２８】
以上のように構成されたサージ吸収器付き電磁接触器の組立を説明する。まず、サージ吸収器の組立について説明する。
【００２９】
ケース１０１にプリント基板１１３が収納され、接触ピン２０４をベース１０２の孔１０３に挿入する。次に、バネ２０３の一端を押圧部材２０１の先端部２０１ｂに貫通させ、バネ２０３の一巻を押圧部材２０１の溝２０１ａに嵌合させる。これにより押圧部材２０１とバネ２０３が一体となる。一体になった押圧部材２０１とバネ２０３をベース１０２の孔１０３に挿入し、押圧部材２０１を溝部１０２ｃに圧入して固定させる。この状態において、押圧部材２０１がバネ２０３の一端を押圧し、バネ２０３の他端が接触ピン２０４を押圧する。したがって、充分な押圧力を接触ピン２０４に与えている。さらに、ケース１０１の孔１０１ａにベース１０２の鎌状の突起１０２ａを嵌合し、ケース１０１とベース１０２が結合する。これによりサージ吸収器１００の組立が完了する。
【００３０】
次に、継手部材１９０をサージ吸収器１００のベース１０２への装着について説明する。
【００３１】
まず、継手部材１９０を矢印ａの方向から水平にベース１０２に挿入する。継手部材１９０の垂直案内部１９１および水平案内部１９２はそれぞれベース１０２の垂直レール部１０５と水平レール部１０６に摺動しながら挿入される。この挿入が進むにつれて継手部材１９０の突起１９４とベース１０２の突起１０７とラップするが継手部材１９０の孔１９５により水平案内部１９２が内側へ弾性変形し、該突起１９４も内側に移動するので、突起１９４が突起１０７を乗り越える。突起１０７の垂直面１０７ａと突起１９４の垂直面１９４ａが相互に当接して継手部材１９０がベース１０２からの抜け止め防止となる。同時に、ベース１０２の傾斜面１０８に継手部材１９０のベース１０２から水平案内部１９２が接触し水平案内部１９２が上方に押し上げられ、継手部材１９０の傾斜部１９３ａ、１９３ｂと水平レール部１０６の入口部と圧接される。さらに、ベース１０２の橋絡部１０９のはめ合い部１０９ｂと継手部材１９０の突起１９８が嵌合する。
【００３２】
継手部材１９０がベース１０２に圧入された後、図２の矢視Ｘから見た平面図を図３に示す。
【００３３】
次に、継手部材１９０が装着されたサージ吸収器１００を本体１５８への取り付けについて説明する。
【００３４】
継手部材１９０の切り欠き部１９６ｄを本体１５８の逆Ｌ型片１５１ａに遊挿するとともに、継手部材１９０のＬ型部１９６ａを本体１５８の切欠き部１５１ｂに遊挿して、矢印ｂのようにサージ吸収器１００をスライド挿入して、本体１５８の逆Ｌ型片１５１ａと継手部材１９０のＬ型部１９６ａ、１９６ｃと連結固定する。ここで、継手部材１９０の水平案内部１９２は下側から荷重を加えながら圧入されているので、この反力によりサージ吸収器１００の突起部１０２ｚが本体１０８の表面に押えられるために、強固な固定力が得られ、本体１５８の端子ねじ２０６と接触ピン２０４の中心軸が一致する。
【００３５】
したがって、押圧部材２０１と一体になったバネ２０３により押圧した接触ピン２０４は端子ねじ２０６により押圧されて接触され、サージ吸収器１０１のサージ吸収素子と端子ねじ２０６とが電気的に接続される。
【００３６】
なお、コイルばね２０３の収縮量が短くとも接触ピン２０４を押圧できるようにすることにより端子ネジ２０６に接続される端子金具の数や厚さにより端子ネジ２０６の頭部の上下位置が変動するが、この位置が下にあっても充分な押圧力を接触ピン２０４に与えることができる。このため端子ネジ２０６に配線されていても容易にサージ吸収器１００の配線ができる。
【００３８】
実施例２．
この発明の他の実施例を図５及び図６を参照して説明する。図５及び図６において、６００は略コの字形のサージ吸収器で、このサージ吸収器６００は略コの字形のベース６０２とケース６０１にサージ吸収素子を結線したプリント基板６１３が収納されている。ここで、サージ吸収器６００の中空部６００ａの幅Ｗが可動体１５９の幅ｗａよりも大きく形成されている。
【００３９】
サージ吸収器６００を本体５１８に取付けた場合、図６に示すように本体５１８の可動体１５９の上面露出部はサージ吸収器６００により覆われないので、可動体１５９の動作確認、すなわち、電磁接触器の動作を目視により確認ができる。また、可動体１５９の上面を作業者が手で押せるので、電磁接触器を組み込んだシステムにおけるシーケンスチック等が容易となる。
【００４０】
なお、電磁接触器の本体５１８に過電流保護継電器５１６を接続した状態において、サージ吸収器６００を固定できる。
【００４１】
【発明の効果】
この発明は以上説明したように第１の発明によれば、サージ吸収素子に電気的に接続された導電性の押圧部材と、上記押圧部材に固定された導電性の弾性体と、上記弾性体に押圧されると共に、上記電磁接触器の端子ネジの頭部を押圧する導電性の充電部材と、上記サージ吸収器には上記押圧部材が固定される固定部を設けると共に、上記サージ吸収器を上記電磁接触器の表面に取付けた状態において、上記電磁接触器の端子ネジの略中心と一致する位置に上記弾性体及び上記充電部材を挿入する孔とを備え、上記弾性体が固定された上記押圧部材及び上記充電部材を上記孔に挿入すると共に、上記固定部に上記押圧部材を固定したので、サージ吸収器と電磁接触器の配線が容易になるという効果がある。
【００４３】
第２の発明によれば、弾性体はコイル状のバネであり、押圧部材は板状であると共に、バネを嵌合させる溝部を備えたので、押圧部材間の絶縁が容易になる効果がある。
【００４５】
第３の発明によれば、サージ吸収器を電磁接触器の接点機構を駆動する可動体上部を覆わないように中空部を設けたので、サージ吸収器を電磁接触器に装着した状態において、電磁接触器の可動体の動作が確認できるという効果がある。
【図面の簡単な説明】
【図１】この発明の実施例を示すサージ吸収器と電磁接触器の斜視図。
【図２】図１のサージ吸収器と電磁接触器の結合部を示す斜視図。
【図３】図１のサージ吸収器と電磁接触器の結合部である部分断面図。
【図４】図１のサージ吸収器付き電磁接触器の断面図である。
【図５】この発明の他の実施例であるサージ吸収器の断面図。
【図６】図５のサージ吸収器を電磁接触器に取付けた正面図である。
【図７】従来のサージ吸収器の斜視図。
【図８】従来の電磁接触器本体の斜視図。 [0001]
[Industrial application fields]
The present invention relates to an improvement in an electromagnetic contactor with a surge absorber to which a surge absorber that suppresses an arc generated between the contacts when the contact mechanism of the electromagnetic contactor is opened and closed.
[0002]
[Prior art]
7 and 8 show an electromagnetic contactor with a surge absorber disclosed in Japanese Utility Model Laid-Open No. 2-74743. In FIG. 7 , reference numeral 10 denotes a surge absorber having a built-in surge absorbing element, and the surge absorber 10 includes a case 11 and a base 12 in which the surge absorbing element is housed. A recess 12a is formed in the lower portion of the base 12, and four claw portions 12b to 12e projecting inward are formed on both side walls of the recess 12a. A support plate 12f is implanted in a substantially central portion of the recess 12a of the base 12 perpendicularly from the bottom surface of the recess 12a, and a tongue piece 12g having elasticity perpendicular to the support plate 12f is provided on the support plate 12f. It has been. The tongue piece 12g is provided with a protrusion 12h that engages with a fitting portion 52e (see FIG. 8 ) on the upper surface of the electromagnetic contactor 50. Reference numeral 14 denotes a lead wire connected to each apex of the delta connection, and 15 denotes a terminal connected to the tip of the lead wire 14.
[0003]
In FIG. 8 , an electromagnetic contactor 50 includes a base 51 and a case 52. The base 51 includes a fixed iron core, an electromagnetic coil wound around the fixed iron core, and a movable body that is attracted to the fixed iron core by energizing the electromagnetic coil. A movable iron core 59 is housed. In the case 52, a movable contact support and a contact mechanism connected to the movable iron core are accommodated. Four hook-shaped engaging portions 52 a to 52 d are formed on the upper surface of the case 52, and the upper portion of the movable body 59 slightly protrudes from the surface of the case 52. Further, a fitting portion 52e made of a square hole is formed on the upper surface of the case 52. Reference numeral 52f denotes a terminal portion to which a wire terminal is connected.
[0004]
The attachment of the surge absorber 10 to the electromagnetic contactor 50 will be described. If the electromagnetic contactor 50 is attached to the control panel or the like in the state shown in FIG. 8 , the bottom surface of the surge absorber 10 faces the top surface of the electromagnetic contactor 50, and the surge absorber 10 is slid to absorb surge. The claw portions 12b to 12e of the container 10 are press-fitted into the hook-shaped engagement portions 52a to 52d on the upper surface of the electromagnetic contactor 50. By this press fitting, the tongue piece 12g of the surge absorber 10 is fitted to the fitting portion 52e of the electromagnetic contactor 50. Thereby, the surge absorber 10 is attached to the electromagnetic contactor 50 and locked. From this state, the terminal 15 of the surge absorber 10 is wired to the terminal portion 52 f of the electromagnetic contactor 50.
[0005]
[Problems to be solved by the invention]
Conventionally, since the surge absorber 10 is attached to the magnetic contactor 50 as described above, when the terminal of the external wire is already wired to the terminal portion 52f, the terminal 15 of the surge absorber 10 is connected to the terminal portion 52f. In order to perform wiring, it is necessary to remove the screw of the terminal portion 52f, connect the terminal 15 to the terminal portion 52f, and then tighten the screw again. Moreover, when the terminal part 52f of the magnetic contactor 50 is wired with a plurality of terminals of the external electric wire, the terminal 15 of the surge absorber 10 may be wired to the terminal part 52f due to the limitation of the number of connection terminals of the terminal part 52f. There is a first problem that it is difficult.
[0006]
Further, when the surge absorber 10 is attached to the surface of the electromagnetic contactor 50, the movable body 59 is covered by the surge absorber 10, and therefore the on / off operation of the electromagnetic contactor 50 should be confirmed by the movable body 59. There is a second problem that it becomes difficult.
[0007]
The first object of the present invention is to solve the above first problem, simplify the wiring between the surge absorber and the electromagnetic contactor, and easily absorb the surge even if the electromagnetic contactor is wired. It is an object of the present invention to provide an electromagnetic contactor with a surge absorber that can be wired.
[0008]
A second object of the present invention is to solve the second problem, and in a state in which the surge absorber is mounted on the electromagnetic contactor, the surge that can confirm the operation state of the electromagnetic contactor. It is to provide an electromagnetic contactor with an absorber.
[0009]
[Means for Solving the Problems]
An electromagnetic contactor with a surge absorber according to a first aspect of the present invention attaches a surge absorber with a built- in surge absorbing element to the surface of the electromagnetic contactor, and electrically connects the terminal screw of the surge absorbing element and the electromagnetic contactor. In the electromagnetic contactor with surge absorber to be connected, a conductive pressing member electrically connected to the surge absorbing element, a conductive elastic body fixed to the pressing member, and the elastic body being pressed In addition, a conductive charging member that presses the head of the terminal screw of the electromagnetic contactor, and a fixed portion to which the pressing member is fixed are provided in the surge absorber, and the surge absorber is connected to the electromagnetic contactor. And a hole for inserting the elastic body and the charging member at a position coinciding with the approximate center of the terminal screw of the electromagnetic contactor, and the pressing member to which the elastic body is fixed. Said charging member is inserted into the hole, it is characterized in that for fixing the pressing member to the fixed part.
[0011]
The electromagnetic contactor with surge absorber according to a second aspect of the invention is characterized in that the elastic body is a coiled spring, the pressing member is plate-shaped, and has a groove for fitting the spring. To do.
[0013]
The electromagnetic contactor with a surge absorber according to a third invention is characterized in that the surge absorber is provided with a hollow portion so as not to cover the upper part of the movable body that drives the movable contact of the electromagnetic contactor. Is.
[0014]
[Action]
According to the electromagnetic contactor with a surge absorber according to the first invention, the conductive pressing member is electrically connected to the surge absorbing element, the conductive elastic body is fixed to the pressing member, and the conductive charging member The member is pressed by the elastic body, and the head of the terminal screw of the electromagnetic contactor is pressed. The fixing portion of the surge absorber is fixed by the pressing member, and the hole of the surge absorber is the surge absorbing member. In a state where the device is attached to the surface of the electromagnetic contactor, the elastic body and the charging member are inserted at a position that coincides with the approximate center of the terminal screw of the electromagnetic contactor.
[0016]
According to the electromagnetic contactor with surge absorber according to the second invention, the coiled spring is fitted into the groove of the plate-shaped pressing member.
[0018]
According to the electromagnetic contactor with surge absorber according to the third invention, the hollow portion of the surge absorber exposes the upper part of the movable body that drives the contact mechanism of the electromagnetic contactor.
[0019]
【Example】
Example 1.
An embodiment of the present invention will be described with reference to FIGS. In FIG. 1, a terminal screw 206 is connected to the main body 158 of the electromagnetic contactor. The upper surface of the main body 158 is provided with a second connecting portion 151 to the surge absorber 100, and the second connecting portion 151 has 2 A pair of opposed inverted L-shaped pieces 151a is provided, and a pair of opposed notched portions 151b with a central portion cut away are provided. The movable body 159 is configured to be movable up and down in conjunction with the movable iron core inside the main body 158.
[0020]
4, 100 denotes a surge absorber, the surge absorber 100 includes a case 101 and the base 102 that are integrated. The case 101 houses a printed circuit board 113 sealed with a casting resin 115. Note that the printed circuit board 113 is connected with three surge absorbing elements composed of a series circuit of a resistor R and a capacitor C by delta connection, and a lead wire 114 is connected to each of the three coupling portions. Reference numeral 110 denotes a fixed terminal for fixing the terminal screw 206, and a contact 110 a is fixed to the tip of the fixed terminal 110. Reference numeral 111a denotes a movable contact that opens and closes with the contact 110a.
[0021]
In FIG. 2, the base 102 of the surge absorber 100 is provided with a notch portion 102b whose bottom surface is notched in a square shape, and a hollow portion 102e penetrating through the central portion of the notch portion 102b is formed. Further, a pair of concave horizontal rail portions 106 for sliding a horizontal guide portion 192 of a joint member 190 (to be described later) are provided on the bottom surface of the base 102 on the side surface of the notch portion 102 b, and are adjacent to the horizontal rail portion 106. A pair of concave vertical rail portions 105 are provided to slide a vertical guide portion 191 of a joint member 190 described later vertically. An arc-shaped second projection 107 is provided on the lower surface portion 106 c of the horizontal rail portion 106, and a vertical surface 107 a is formed at one end of the second projection 107. Further, an inclined second inclined portion 108 is provided at the back end of the lower surface portion 106c. In addition, a quadrangular recess 109a is provided at the lower center of the bridging portion 109 that couples the two vertical rail portions 105, and a fitting portion 109b is provided in the recess 109a. In addition, four protrusions 102z are formed on the bottom surface of the base 102 so as to slightly protrude and each have a uniform height. In this embodiment, the horizontal rail portion 106 and the vertical rail portion 105 constitute a guide receiving portion, but either one may be a guide receiving portion.
[0022]
In FIG. 1, pressing members 201 made of a conductive material are connected to the ends of three lead wires 114, respectively. The pressing member 201 is provided with a groove portion 201a for fitting and locking to an inner diameter portion of a coiled spring 203 as an elastic body made of a conductive material, and a spring is provided from the groove portion 201a of the pressing member 201 to the tip. A distal end portion 201 b that fits into 203 is provided. Note that the shape of the pressing member 201 does not have to be a plate shape. For example, a rod shape may be used, but a plate shape is desirable in order to secure an insulation distance between the pressing members 201. One end of the spring 203 has a smaller outer diameter than the outer diameter of the head 204a in order to press the contact pin 204 as a charging member having the head 204a.
[0023]
The base 102 is provided with a hole 103 into which a pressing member 201, a spring 203, and a contact pin 204 are inserted. After the contact pin 204 is inserted into the hole 103 at the tip of the hole 103, A cylindrical guide portion 104 having a function of preventing the contact pin 204 from shifting in the lateral direction is provided. Further, when the surge absorber 100 is attached to the surface of the main body 158 of the electromagnetic contactor, the hole 103 is formed so as to coincide with the center of the head of the terminal screw 206 of the main body 158.
[0024]
A groove portion 102c as a plate-like fixing portion for press-fitting the pressing member 201 into the base 102 is formed in the insertion opening of the hole 103, and the pressing member 201 is located between the pressing members 201 in the vicinity of the hole 103. A barrier 102d is formed to ensure insulation. The case 101 is provided with holes 101a drilled at four locations on the side surface, and the base 102 is provided with sickle-like protrusions 102a that fit into the holes 101a.
[0025]
In FIG. 2, reference numeral 190 denotes a joint member. The joint member 190 has a function of mediating the connection between the surge absorber 100 and the main body 158, and after the joint member 190 is press-fitted into the surge absorber 100 , The member 190 is slid to the main body 158 and firmly fixed.
[0026]
The joint member 190 is substantially U-shaped, and the joint member 190 has a pair of opposed L-shaped first connecting portions 196 coupled to the second connecting portions 151 of the main body 158 at both ends of the lower surface. The first connecting portion 196 is provided with a pair of opposed L-shaped portions 196a at one end, and a pair of opposed L-shaped portions 196c formed by two notches 196b at the other end, The part is formed with a pair of notched parts 196d that are opposed to each other. A pair of plate-like horizontal guide portions 192 that are slidably coupled to the horizontal rail portion 106 of the base 102 are provided on both side surfaces of the joint member 190. A pair of plate-shaped vertical guide portions 191 that are slidably coupled to the vertical rail portion 109 of the base 102 is provided on the upper portion of the joint member 190. First inclined portions 193a and 193b formed in two stages are provided at the front end of the horizontal guide portion 192. In this embodiment, the horizontal guide part 192 and the vertical guide part 191 constitute a guide part, but either one may be a guide part. Further, although the first inclined portions 193a and 193b are formed in two stages, any one of the inclined portions 193a and 193b may be provided.
[0027]
In addition, a pair of first protrusions 194 having a function of preventing the slip is formed on the side surface of the horizontal guide portion 192 and is formed as an arc-shaped smooth surface, and a vertical surface is provided at one end of the first protrusion 194. 194a is formed. Further, the horizontal guide portion 192 is provided with a pair of rectangular holes 195, and the side surface of the horizontal guide portion 192 is pressed by the holes 195 so as to be elastically deformable. A bridging portion 198 that bridges both horizontal guide portions 192 is provided. The bridging portion 198 is provided with a projection 198a at the center, and is fitted into the fitting portion 109b of the base 102 at the back of the projection 198a. A square protrusion 198b to be joined is provided.
[0028]
The assembly of the electromagnetic contactor with surge absorber configured as described above will be described. First, assembly of the surge absorber will be described.
[0029]
A printed circuit board 113 is accommodated in the case 101, and the contact pins 204 are inserted into the holes 103 of the base 102. Next, one end of the spring 203 is passed through the tip 201 b of the pressing member 201, and one turn of the spring 203 is fitted into the groove 201 a of the pressing member 201 . As a result, the pressing member 201 and the spring 203 are integrated. The integrated pressing member 201 and the spring 203 are inserted into the hole 103 of the base 102, and the pressing member 201 is press-fitted into the groove 102c and fixed. In this state, the pressing member 201 presses one end of the spring 203, and the other end of the spring 203 presses the contact pin 204. Therefore, a sufficient pressing force is applied to the contact pin 204. Furthermore, the sickle-shaped protrusion 102a of the base 102 is fitted into the hole 101a of the case 101, and the case 101 and the base 102 are coupled. Thereby, the assembly of the surge absorber 100 is completed.
[0030]
Next, attachment of the joint member 190 to the base 102 of the surge absorber 100 will be described.
[0031]
First, the joint member 190 is inserted into the base 102 horizontally from the direction of the arrow a. The vertical guide portion 191 and the horizontal guide portion 192 of the joint member 190 are inserted into the vertical rail portion 105 and the horizontal rail portion 106 of the base 102 while sliding. As this insertion proceeds, the projection 194 of the joint member 190 and the projection 107 of the base 102 overlap with each other, but the horizontal guide portion 192 is elastically deformed inward by the hole 195 of the joint member 190, and the projection 194 also moves inward. 194 gets over the protrusion 107. The vertical surface 107 a of the protrusion 107 and the vertical surface 194 a of the protrusion 194 are in contact with each other, and the joint member 190 is prevented from coming off from the base 102. At the same time, the horizontal guide portion 192 contacts a horizontal guide portion 192 from the base 102 of the joint member 190 to the inclined surface 108 of the base 102 is pushed upward, the inclined portion of the joint member 190 193a, 193b and the inlet portion of the horizontal rail portion 106 And pressed. Further, the fitting portion 109b of the bridging portion 109 of the base 102 and the protrusion 198 of the joint member 190 are fitted.
[0032]
After the joint member 190 is press-fitted into the base 102, FIG. 3 shows a plan view seen from the arrow X in FIG.
[0033]
Next, attachment of the surge absorber 100 to which the joint member 190 is attached to the main body 158 will be described.
[0034]
The notched portion 196d of the joint member 190 is loosely inserted into the inverted L-shaped piece 151a of the main body 158, and the L-shaped portion 196a of the joint member 190 is loosely inserted into the notched portion 151b of the main body 158 as shown by the arrow b. The surge absorber 100 is slid and inserted and fixed to the inverted L-shaped piece 151 a of the main body 158 and the L-shaped portions 196 a and 196 c of the joint member 190. Here, since the horizontal guide portion 192 of the joint member 190 is press-fitted while applying a load from the lower side, the protrusion 102z of the surge absorber 100 is pressed against the surface of the main body 108 by this reaction force. A fixing force is obtained, and the center axis of the terminal screw 206 of the main body 158 and the contact pin 204 coincide.
[0035]
Therefore, the contact pin 204 that is pressed by the pressing member 201 and a spring 203 which is integral is contacted is pressed by the terminal screw 206, and the surge absorbing element and the terminal screw 206 of the surge absorber 101 are electrically connected.
[0036]
Although the vertical position of the head of the terminal screw 206 by the number and thickness of the terminal fitting to be connected to the terminal screws 206 by contraction of the coil spring 203 to be able to press the contact pin 204 also short fluctuates Even if this position is below, a sufficient pressing force can be applied to the contact pin 204. For this reason, even if it is wired to the terminal screw 206 , the surge absorber 100 can be easily wired.
[0038]
Example 2
Another embodiment of the present invention will be described with reference to FIGS. 5 and 6 , reference numeral 600 denotes a substantially U-shaped surge absorber. The surge absorber 600 stores a substantially U-shaped base 602 and a printed circuit board 613 in which a surge absorbing element is connected to a case 601. . Here, the width W of the hollow portion 600 a of the surge absorber 600 is formed larger than the width wa of the movable body 159.
[0039]
If the surge absorber 600 is attached to the body 518, the upper surface exposed portion of the movable body 159 of the body 518 is not covered by the surge absorber 600 as shown in FIG. 6, the operation check of the movable body 159, i.e., an electromagnetic contactor The operation of the vessel can be confirmed visually. In addition, since the operator can press the upper surface of the movable body 159 by hand, sequence ticks and the like in a system incorporating an electromagnetic contactor are facilitated.
[0040]
In addition, the surge absorber 600 can be fixed in a state where the overcurrent protection relay 516 is connected to the main body 518 of the magnetic contactor.
[0041]
【The invention's effect】
As described above, according to the first aspect of the present invention, the conductive pressing member electrically connected to the surge absorbing element, the conductive elastic body fixed to the pressing member, and the elastic body A conductive charging member that presses the head of the terminal screw of the magnetic contactor, and a surge absorber is provided with a fixing portion to which the pressing member is fixed, and the surge absorber In the state attached to the surface of the electromagnetic contactor, the elastic contactor is provided with a hole for inserting the elastic body and the charging member at a position coinciding with the approximate center of the terminal screw of the electromagnetic contactor, and the elastic body is fixed. Since the pressing member and the charging member are inserted into the hole and the pressing member is fixed to the fixing portion, there is an effect that wiring between the surge absorber and the electromagnetic contactor becomes easy.
[0043]
According to the second invention, the elastic body is a coiled spring, the pressing member is plate-shaped, and the groove portion for fitting the spring is provided, so that there is an effect that the insulation between the pressing members is facilitated. .
[0045]
According to the third invention, since the surge absorber is provided with the hollow portion so as not to cover the upper part of the movable body that drives the contact mechanism of the electromagnetic contactor, in the state where the surge absorber is attached to the electromagnetic contactor, the electromagnetic There is an effect that the operation of the movable body of the contactor can be confirmed.
[Brief description of the drawings]
FIG. 1 is a perspective view of a surge absorber and an electromagnetic contactor showing an embodiment of the present invention.
2 is a perspective view showing a coupling portion between the surge absorber and the magnetic contactor of FIG. 1;
3 is a partial cross-sectional view showing a coupling portion between the surge absorber and the magnetic contactor of FIG. 1;
4 is a cross-sectional view of the electromagnetic contactor with surge absorber of FIG.
FIG. 5 is a cross-sectional view of a surge absorber according to another embodiment of the present invention.
6 is a front view of the surge absorber shown in FIG . 5 attached to an electromagnetic contactor.
FIG. 7 is a perspective view of a conventional surge absorber.
FIG. 8 is a perspective view of a conventional electromagnetic contactor body.

Claims

In the electromagnetic contactor with a surge absorber that attaches a surge absorber with a built- in surge absorbing element to the surface of the magnetic contactor, and electrically connects the surge absorbing element and the terminal screw of the electromagnetic contactor,
A conductive pressing member electrically connected to the surge absorbing element;
A conductive elastic body fixed to the pressing member;
A conductive charging member that is pressed by the elastic body and presses the head of the terminal screw of the electromagnetic contactor;
In the state where the surge absorber is provided with a fixing portion to which the pressing member is fixed, and the surge absorber is attached to the surface of the electromagnetic contactor,
A hole for inserting the elastic body and the charging member at a position coinciding with the approximate center of the terminal screw of the electromagnetic contactor; and the pressing member and the charging member to which the elastic body is fixed are inserted into the hole. In addition, an electromagnetic contactor with a surge absorber, wherein the pressing member is fixed to the fixing portion.

The electromagnetic contactor with a surge absorber according to claim 1, wherein the elastic body is a coiled spring, the pressing member is plate-shaped, and includes a groove portion into which the spring is fitted.

3. The surge absorber according to claim 1, wherein a hollow portion is provided in the surge absorber so as not to cover an upper portion of a movable body that drives a movable contact of the electromagnetic contactor. With magnetic contactor.