JP4599731B2

JP4599731B2 - Connecting terminal

Info

Publication number: JP4599731B2
Application number: JP2001061658A
Authority: JP
Inventors: 勝高橋
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2001-03-06
Filing date: 2001-03-06
Publication date: 2010-12-15
Anticipated expiration: 2021-03-06
Also published as: JP2002260751A

Description

【０００１】
【発明の属する技術分野】
この発明は、例えば放電加工機における電源装置から加工機本体への加工電力供給用配線の中継等に用いられる接続端子の改良に関するものである。
【０００２】
【従来の技術】
接続端子を用いる例として、以下において放電加工機の場合について説明する。放電加工機においては、電源装置と加工機本体との間の輸送時等における切り離しの必要性のため、接続端子が設けられている。また、放電加工機では、電源装置内のパルス電源ユニットから加工機本体に加工電力を供給するために同軸ケーブルが一般的に使用されている。この同軸ケーブルのコア導体とシールド導体には互いに逆方向となる往路電流又は復路電流をそれぞれ通電させ、方向の違う電流による磁界の相互打ち消し作用によりインダクタンスを低減させ、放電電流のピーク値の低下を抑制することにより加工速度の低下を防止している。
【０００３】
図１１は、放電加工機において一般的に使用されている従来の接続端子の構成図であり、図において、１は端子台、１ａ及び１ｂは端子台導体部、２は同軸ケーブル、２ａはコア導体、２ｂはシールド導体、３ａ及び３ｂは圧着端子、４は配線接続用ネジである。コア導体２ａ及びシールド導体２ｂは、同軸ケーブル２の端末近傍において露出し分離させられ絶縁チューブにより被覆されており、コア導体２ａ及びシールド導体２ｂの端末に付けられた圧着端子３ａ及び３ｂが配線接続用ネジ４によりそれぞれ端子台導体部１ａ及び１ｂに固定される。このように、同軸ケーブル２のコア導体２ａ及びシールド導体２ｂは、配線接続用ネジ４により、それぞれ端子台導体部１ａ及び１ｂとの接続及び切り離しが可能となるように構成されている。
【０００４】
図１２は、実開平２−１５０７６７号公報に開示された従来の接続端子の別の構成図であり、図１２の（ａ）は端子台部分の構成図、図１２の（ｂ）は同軸ケーブルと端子台の導体部との間に介在させる接触導体と同軸ケーブルとの接続を示す断面図である。図１２において、図１１と同一符号は同一又は相当部分を示しており、２ｃはコア導体２ａとシールド導体２ｂを絶縁する絶縁体、２ｄはシース、５ａ及び５ｂは接触導体、６は接触導体５ａ及び５ｂを絶縁する絶縁板である。接触導体５ａ及び５ｂは絶縁板６を挟んでほぼ密着して積層されている。
【０００５】
図１２の（ｂ）のように、同軸ケーブル２のシールド導体２ｂは、接触導体５ｂ側面に半田付けされ、コア導体２ａは、接触導体５ｂ、絶縁板６及び接触導体５ａの３部材を貫通させてから、接触導体５ａに半田付けされる。
【０００６】
図１２の（ａ）のように、接触導体５ａ及び５ｂは、配線接続用ネジ４により、それぞれ端子台導体部１ａ及び１ｂとの接続及び切り離しが可能となるように構成されている。
【０００７】
【発明が解決しようとする課題】
図１１のような構成の従来の接続端子では、同軸ケーブル２のコア導体２ａとシールド導体２ｂとが各々、接続端子台１上の同一平面上に並設された端子台導体部１ａ及び１ｂにネジ止めされており、往路電流と復路電流との間に同軸ケーブル２の端末を分離した開きの部分からなるループ空間（図中Ｓ）が形成され、このループ空間部分においては前記往路電流及び復路電流による磁界の打ち消しが不十分となり、この部分でインダクタンスが増大し、近年における加工速度向上のための大電流化の要求に対応できないという問題点があった。
【０００８】
図１２のような構成の従来の接続端子では、コア導体２ａとシールド導体２ｂの端末がほぼ密着したまま接触導体５ａ及び５ｂに接続され、この接触導体が端子台導体部１ａ及び１ｂに接続されるため、図１１の構成のような同軸ケーブル２端末の前記ループ空間（図１１のＳ）を無くすことができ、接続端子部のインダクタンスを減少させることができる。しかし、特にコア導体２ａを接触導体５ｂ、絶縁板６及び接触導体５ａの３部材を貫通させてから、接触導体５ａに半田付けする必要がある等作業性が悪いと共に接触導体５ａ及び５ｂ等の部品点数増加により製造コストが増大するという問題点があった。
【０００９】
また、コア導体２ａの前記貫通部において、コア導体２ａ及びシールド導体２ｂ間の絶縁距離が不足する問題点があった。
【００１０】
さらに、前記のような大電流化の要求に対応するために同軸ケーブルの本数を増加した場合の考慮が何らなされていないという問題点があった。
【００１１】
この発明は、前記のような問題点を解消するためになされたものであり、加工速度向上のための大電流化の要求に対応できると共に製造時の作業性の改善及び部品点数削減等により製造コストを低減することができる接続端子を得ることを目的とする。
【００１２】
また、大電流化の要求に対応するために複数本の同軸ケーブル等の分布定数線路の接続を容易に行うことができる接続端子を得ることを目的とする。
【００１３】
また、同軸ケーブル等の分布定数線路の導体間の絶縁距離を簡単に確保することができる接続端子を得ることを目的とする。
【００１４】
【課題を解決するための手段】
この発明に係る接続端子は、少なくとも１本の分布定数線路を接続する接続端子において、前記分布定数線路の第１の導体の端末に固定された第１の端末接続手段と、前記分布定数線路の第２の導体の端末に固定された第２の端末接続手段と、第１の導体板と第２の導体板とを絶縁板を介して積層してなる積層部材と、前記第１の導体板及び前記第１の端末接続手段との接続及び切り離しを行う第１の締結手段と、前記第２の導体板及び前記第２の端末接続手段との接続及び切り離しを行う第２の締結手段とを備えたものである。
【００１５】
また、この発明に係る接続端子は、第１の分布定数線路及び第２の分布定数線路を接続する接続端子において、前記第１の分布定数線路の第１の導体の端末と前記第２の分布定数線路の第２の導体の端末とを合わせて固定してなる第１の端末接続手段と、前記第１の分布定数線路の第２の導体の端末と前記第２の分布定数線路の第１の導体の端末とを合わせて固定してなる第２の端末接続手段と、第１の導体板と第２の導体板とを絶縁板を介して積層してなる積層部材と、前記第１の導体板及び前記第１の端末接続手段との接続及び切り離しを行う第１の締結手段と、前記第２の導体板及び前記第２の端末接続手段との接続及び切り離しを行う第２の締結手段とを備えたものである。
【００１６】
また、この発明に係る接続端子は、前記第１の締結手段が前記第１の導体板に植設された第１のスタッドボルト及びこの第１のスタッドボルトに前記第１の端末接続手段を締結するための第１のナットであり、前記第２の締結手段が前記第２の導体板に植設された第２のスタッドボルト及びこの第２のスタッドボルトに前記第２の端末接続手段を締結するための第２のナットであるものである。
【００１７】
また、この発明に係る接続端子は、前記端末接続手段が圧着端子であるものである。
【００１８】
また、この発明に係る接続端子は、前記第１の導体板及び第２の導体板に他の積層部材又はパワー基板等の他の機器と接続するための接続部分を設けたものである。
【００１９】
また、この発明に係る接続端子は、少なくとも１本の分布定数線路を接続する接続端子において、前記分布定数線路の第１の導体を第１の導体板に固着する第１の固着手段と、前記分布定数線路の第２の導体を第２の導体板に固着する第２の固着手段と、前記第１の導体板と前記第２の導体板とを絶縁板を介して積層してなる積層部材とを備え、前記第１の導体板及び第２の導体板に他の積層部材又はパワー基板等の他の機器と接続するための接続部分を設けたものである。
【００２０】
また、この発明に係る接続端子は、前記絶縁板の外形を前記第１の導体板及び第２の導体板の外形よりも大きく形成したものである。
【００２１】
また、この発明に係る接続端子は、少なくとも１本の分布定数線路を接続する接続端子において、前記分布定数線路の第１の導体を第１の導体板に接続する第１の接続手段と、前記分布定数線路の第２の導体を第２の導体板に接続する第２の接続手段と、前記第１の導体板と前記第２の導体板とを第１の絶縁板を介して積層してなる第１の積層部材と、第１の連結導体板と第２の連結導体板とを第２の絶縁板を介して積層してなる第２の積層部材と、前記第１の導体板と前記第１の連結導体板との接続及び切り離しを行う第１の締結手段と、前記第２の導体板と前記第２の連結導体板との接続及び切り離しを行う第２の締結手段と、前記第２の積層部材の前記第１の連結導体板及び第２の連結導体板をパワー基板等の機器に接続する第３の接続手段とを備えたものである。
【００２２】
また、この発明に係る接続端子は、少なくとも１本の分布定数線路を接続する接続端子において、前記分布定数線路の第１の導体を第１の導体板に接続する第１の接続手段と、前記分布定数線路の第２の導体を第２の導体板に接続する第２の接続手段と、絶縁板である中央隔壁部を有し、機器の筐体等の側壁に取り付け可能に形成された絶縁台と、前記第１の導体板と前記第２の導体板とを前記中央隔壁部を介して積層してなる第１の積層部材と、第１の連結導体板と第２の連結導体板とを前記中央隔壁部を介して積層してなる第２の積層部材と、前記第１の導体板を前記絶縁台と締結する第１の締結手段と、前記第２の導体板を前記絶縁台と締結する第２の締結手段と、前記第１の導体板と前記第１の連結導体板との接続及び切り離しを行う第３の締結手段と、前記第２の導体板と前記第２の連結導体板との接続及び切り離しを行う第４の締結手段とを備えたものである。
【００２３】
【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に係る接続端子の構成図であり、図において、３ａ及び３ｂは端末接続手段の一例である圧着端子、７ａ及び７ｂはスタッドボルト、８ａ及び８ｂはナット、９ａ及び９ｂは座金、１０ａは第１の導体板、１０ｂは第２の導体板、１１は絶縁板、１０１は同軸ケーブル、１０１ａは同軸ケーブル１０１の第１の導体であるコア導体、１０１ｂは同軸ケーブル１０１の第２の導体であるシールド導体である。スタッドボルト７ａ、ナット８ａ及び座金９ａ並びにスタッドボルト７ｂ、ナット８ｂ及び座金９ｂが、端末接続手段である圧着端子３ａ及び３ｂを導体板１０ａ及び１０ｂと締結する締結手段を構成している。
【００２４】
図２は、締結手段の構成を説明するための部分断面図であり、図において図１と同一符号は同一又は相当部分を示している。スタッドボルト７ａ及び７ｂは第１の導体板１０ａ及び１０ｂに植設されている。即ち、スタッドボルト７ａは例えば絶縁板１１側から第１の導体板１０ａに圧入され固定されており、また、スタッドボルト７ｂは例えば絶縁板１１側から第２の導体板１０ｂに圧入され固定されている。このような構成により、第１の導体板１０ａ、絶縁板１１及び第２の導体板１０ｂは密着積層でき、圧着端子３ａ及び３ｂの穴部にスタッドボルト７ａ及び７ｂを挿入して、ナット８ａ及び８ｂにより締結することができる。
【００２５】
図１において、コア導体１０１ａ及びシールド導体１０１ｂは、同軸ケーブル１０１の端末近傍において露出し分離させられ絶縁チューブにより被覆されており、端末に付けられた圧着端子３ａ及び３ｂが前記締結手段によりそれぞれ導体板１０ａ及び１０ｂに固定される。このように、同軸ケーブル１０１のコア導体１０１ａ及びシールド導体１０１ｂは、前記締結手段により、それぞれ導体板１０ａ及び１０ｂとの接続及び切り離しが可能となるように構成されている。
【００２６】
第１の導体板１０ａ及び第２の導体板１０ｂには、互いに逆向きの加工電流（往復電流）が流れ、この加工電流が高周波であることから表皮効果を考慮して薄く幅の広い帯状導体が使用される。絶縁板１１は例えばエポキシ樹脂などの絶縁材が使用され、この絶縁板１１を挟んで導体板１０ａ及び１０ｂとは積層されており、第１の導体板１０ａ、絶縁板１１及び第２の導体板１０ｂからなる積層部材の厚さ（図中Ｄ）は必要最小限の厚さとされる。また、第１の導体板１０ａと第２の導体板１０ｂとの間の絶縁板１１の端部は導体板１０ａと導体板１０ｂとの間から延長されている。また、前記積層部材の導体板１０ａ及び１０ｂの端部を図中Ｃのように面取り形状として、同軸ケーブル１０１の端末を分離した開きの部分からなるループ空間（図中Ｓ１）をより小さく形成している。
【００２７】
圧着端子３ａ及び３ｂは前記積層部材の導体板１０ａ及び１０ｂ表面に圧着端子の接合面（図中Ｅ）を合わせて固定されているため、前記ループ空間（図中Ｓ１）を例えば従来技術の図１１のＳと比較して小さく形成することができ、このループ空間部分におけるインダクタンスの増大を抑制することができる。したがって、加工速度向上のための大電流化への対応性を向上することができる。
【００２８】
また、圧着端子３ａ及び３ｂを用いてコア導体１０１ａ及びシールド導体１０１ｂを導体板１０ａ及び１０ｂ表面に固定する方式のため、従来技術の図１２の構成のようなコア導体２ａ及びシールド導体２ｂの接触導体５ａ及び５ｂへの複雑な接合作業が不要となると共に接触導体５ａ及び５ｂ等の介在が不要であり、部品点数を削減することができる。したがって、製造コストを削減することができると共に信頼性を向上することができる。さらに、第１の導体板１０ａと第２の導体板１０ｂとの間の絶縁板１１の縁がコア導体１０１ａとシールド導体１０１ｂとの間に延長されているので、必要な絶縁距離を簡単に確保することができる。
【００２９】
次に、前記積層部材の保持構造の一例を図３によって説明する。第１の導体板１０ａと第２の導体板１０ｂとには、適宜な位置にそれぞれ穴Ｈ１０ａ、Ｈ１０ｂが設けられ、絶縁板１１には穴Ｈ１１が設けられている。１２は絶縁ブッシュで、穴Ｈ１２の周りに円形段部１２ａ及び筒部１２ｂを有する。１３は絶縁カラーで、絶縁ブッシュ１２の筒部１２ｂを受け入れる穴Ｈ１３の周りに円形段部１３ａを有する。絶縁ブッシュ１２と絶縁カラー１３は、それぞれ第１の導体板１０ａの穴Ｈ１０ａ又は第２の導体板１０ｂの穴Ｈ１０ｂに、円形段部１２ａ又は１３ａが嵌合されると共に、絶縁ブッシュ１２の筒部１２ｂが絶縁板１１の穴Ｈ１１に嵌合される。この組立状態で絶縁ブッシュ１２の穴Ｈ１２を通るボルト１４とナット１５により締め付け固定される。さらに、前記ボルト１４又はナット１５を利用して筐体等への固定が可能である。
【００３０】
以上の説明においては、第１の導体板１０ａ、絶縁板１１及び第２の導体板１０ｂからなる積層部材に片側から１本の同軸ケーブルを接続する場合を示したが、複数本を接続してもよい。前記積層部材への同軸ケーブルの接続は、圧着端子及び締結手段等による簡単な構成で可能であるため、大電流化の要求に対応するための同軸ケーブルの本数増加を容易に行うことができる。
【００３１】
また、以上の説明においては、同軸ケーブルのコア導体及びシールド導体の端末に端末接続手段として圧着端子を固定して、この圧着端子を第１の導体板及び第２の導体板に接続したが、同軸ケーブルのコア導体及びシールド導体の端末に所定形状の導体板を半田付け又は抵抗溶接等により接続し、この端末接続手段である導体板を第１の導体板及び第２の導体板にボルト締結等により接続してもよい。
【００３２】
また、以上の説明においては、同軸ケーブルを用いる場合を示したが、ツイストペアケーブル等の他の分布定数線路を用いる場合においても同様の効果を奏する。
【００３３】
また、以上の説明においては、締結手段として、スタッドボルト及びナットを用いる場合を示したが、このような締結手段に限定されるものではなく、通常のボルト及びナットを用いる等、所望の絶縁特性等を確保して、端末接続手段と導体板との接続及び切り離しが可能な構成であればよい。
【００３４】
実施の形態２．
図４は、この発明の実施の形態２に係る接続端子の構成図であり、実施の形態１の図１と同一符号は同一又は相当部分を示している。実施の形態２は実施の形態１と基本的な構成は同様であり、また、同様の作用効果を奏するものである。図４において、１０２、１０３及び１０４は同軸ケーブル、１０２ａ、１０３ａ及び１０４ａは第１の導体であるコア導体、１０２ｂ、１０３ｂ及び１０４ｂは第２の導体であるシールド導体であり、同軸ケーブル１０１及び１０２は一組で使用され、同様に同軸ケーブル１０３及び１０４も一組で使用される。以下において、同軸ケーブル１０１及び１０２を例にとって説明する。
【００３５】
図４の（ｂ）に示すように、同軸ケーブル１０１のシールド導体１０１ｂと同軸ケーブル１０２のコア導体１０２ａを合わせて、圧着端子３ｂにより第２の導体板７ｂに接続し、同軸ケーブル１０１のコア導体１０１ａと同軸ケーブル１０２のシールド導体１０２ｂを合わせて、圧着端子３ａにより第１の導体板７ａに接続する構成をとっている。したがって、同軸ケーブル１０１のコア導体１０１ａと同軸ケーブル１０２のシールド導体１０２ｂには同方向の電流が流れ、同軸ケーブル１０２のコア導体１０２ａと同軸ケーブル１０１のシールド導体１０１ｂには同方向の電流が流れる。
【００３６】
以上のような同軸ケーブルの組み合わせ構成により、この組み合わせ構成からなる分布定数線路のインダクタンスが電流の方向の違いによっても同等となるため、方向の違う電流による磁界の相互打ち消し作用の効果を高めることができ、実施の形態１のような構成の場合に加えて、さらに放電電流のピーク値の低下を抑制することができるため、より加工速度を向上することができる。
【００３７】
以上の説明においては、同軸ケーブル１０１、１０２、１０３及び１０４の４本を用いて、同軸ケーブル１０１及び１０２を一組、同軸ケーブル１０３及び１０４を一組とする場合について説明したが、同軸ケーブルの本数は４本に限定されるものではなく、大電流化の要求等に対応するために、さらに本数を増やしてもよい。
【００３８】
実施の形態３．
図５は、この発明の実施の形態３に係る接続端子の構成図であり、実施の形態１の図１と同一符号は同一又は相当部分を示している。実施の形態３は実施の形態１と基本的な構成は同様であり、また、同様の作用効果を奏するものである。図５において、１６ａは第１の導体板、１６ｂは第２の導体板である。実施の形態１及び２と同様に、第１の導体板１６ａ、絶縁板１１及び第２の導体板１６ｂにより積層部材が構成される。また、第１の導体板１６ａ及び第２の導体板１６ｂはＬ形に形成されており、図６に示すように積層部分であるＬ１と接続部分であるＬ２により構成される。接続部分Ｌ２には、接続用のボルト等を通す穴Ｈ１６が形成されている。
【００３９】
導体板１６ａ及び１６ｂに接続部分Ｌ２を設けることにより、例えば他の積層部材の接続部分と接続することができると共にパワー基板等の機器に直接接続することもできる。
【００４０】
このような接続部分を設けることにより、この接続部分で接続及び切り離しが可能となるため、図５における締結手段であるスタッドボルト７ａ、ナット８ａ及び座金９ａ並びにスタッドボルト７ｂ、ナット８ｂ及び座金９ｂを、例えばリベット、半田付け又は抵抗溶接等の固着手段とすることもできる。このような固着手段を用いてコア導体１０１ａ及びシールド導体１０１ｂを、それぞれ導体部１６ａ及び１６ｂに固定する場合には、前記締結手段による場合と比較して作業の迅速性及び固定部の信頼性を向上することができる。
【００４１】
以上の説明においては、第１の導体板１６ａ及び第２の導体板１６ｂをＬ形として接続部分（Ｌ２）を形成したが、導体板に接続部分を設ける形状はこのような形状に限定されるものではなく、他の積層部材の接続部分又はパワー基板等の機器に接続できる形状であればよい。
【００４２】
実施の形態４．
図７は、この発明の実施の形態４に係る接続端子の構成図であり、実施の形態３の図５と同一符号は同一又は相当部分を示している。図７において、１１は第１の絶縁板、１７ａは第１の導体板１６ａと接続される第１の連結導体板、１７ｂは第２の導体板１６ｂと接続される第２の連結導体板、１８は第２の絶縁板、１９ａ及び１９ｂは絶縁シート、２０は電源装置に収納されるパルス電源ユニットのパワー基板、２１は取り付け金具、２２はボルト、２３はナット、２４はボルトである。また、１２は絶縁ブッシュ、１３は絶縁カラー、１４はボルトであり、実施の形態１の図３と同様の積層部材の保持構造となっており、ボルト１４により取り付け金具２１に固定され、第１の連結導体板１７ａ、第２の絶縁板１８及び第２の連結導体板１７ｂ等により構成される積層部材を保持している。
【００４３】
第１の連結導体板１７ａ及び第２の連結導体板１７ｂは、第２の絶縁板１８とその両側に配設された絶縁シート１９ａ及び１９ｂとを挟んで積層され、第１の導体板１６ａ及び第２の導体板１６ｂと同様のＬ形の接続部分を有しており、ボルト２２及びナット２３により、それぞれ第１の導体板１６ａ及び第２の導体板１６ｂと接続される。
【００４４】
第１の連結導体板１７ａ及び第２の連結導体板１７ｂの前記Ｌ形の接続部分の反対側端部は、図のように折り曲げられており、この端部（図中Ｆ）は、パワー基板２０の出力部分に形成されたスルーホールに挿入され、例えば半田付け等の接続手段により接続される。
【００４５】
第２の絶縁板１８は、第１の絶縁板１１よりも厚く、かつ、第１の連結導体板１７ａ及び第２の連結導体板１７ｂのＬ形の接続部分よりも後退して構成されているので、第１の導体板１６ａ及び第２の導体板１６ｂとの間から突出している絶縁板１１の端縁（図中Ｇ）を、第１の連結導体板１７ａ及び第２の連結導体板１７ｂとの間に支障無く挿入することができる。また、絶縁シート１９ａ及び１９ｂの先端（図中Ｈ）は、絶縁板１８の端縁（図中Ｇ）の両側に延長されており、この部分の第１の連結導体板１７ａ及び第２の連結導体板１７ｂとの間の絶縁距離を延ばすことができる。また、絶縁シート１９ａ及び１９ｂの他端（図中Ｉ）は、図のように湾曲して延びており、第１の連結導体板１７ａと第２の連結導体板１７ｂとの間の絶縁が確保されている。
【００４６】
以上の説明においては、パワー基板２０を備えるパルス電源ユニットが１台の場合を示したが、より大きい加工電流を得るために複数台を接続してもよい。
【００４７】
図７の構成において、パルス電源ユニットを取り出す場合又は輸送等で電源装置と機械本体を切り離す場合には、同軸ケーブル１０１を接続したまま、かつ、第１の導体板１６ａ、絶縁板１１及び第２の導体板１６ｂを積層組立したままの状態で、ボルト２２及びナット２３を外すことにより、前記パルス電源ユニットの取り出し等が可能である。このようなボルト２２等の取り外し又は再接続作業は、少ない本数のボルト等の取り外し又は締結作業により可能なため、多数本の同軸ケーブルの取り外し及び再接続作業よりも簡単に行うことができる。
【００４８】
また、パワー基板２０から第１の導体板１６ａ及び第２の導体板１６ｂまでの経路に従来のような同軸ケーブルを使用せず、第１の連結導体板１７ａ及び第２の連結導体板１７ｂを使用して接続しているので、特に大電流を流す場合において、小形化を図ることができると共に電流経路を短縮することができる。さらに、第１の導体板１６ａ及び第２の導体板１６ｂ並びに第１の連結導体板１７ａ、第２の連結導体板１７ｂはほぼ密着積層されていると共に第１の導体板１６ａと第１の連結導体板１７ａとの接続部分及び第２の導体板１６ｂと第２の連結導体板１７ｂとの接続部分も密着しているので、パワー基板２０から機械本体に接続される同軸ケーブルに至るまで低インダクタンスの電流経路を構成することができる。さらにまた、第１の導体板１６ａ及び第２の導体板１６ｂによって、複数台のパルス電源ユニットを並列接続するための導体を兼ねることもできる。
【００４９】
実施の形態５．
図８は、この発明の実施の形態５に係る接続端子の構成図であり、図において、実施の形態４の図７と同一符号は同一又は相当部分を示している。図８において、１０ａは第１の導体板、１０ｂは第２の導体板、２５ａ及び２５ｂはスタッドボルト、２６ａ及び２６ｂはナット、２７ａ及び２７ｂは座金、２８ａは第１の連結導体板、２８ｂは第２の連結導体板である。
【００５０】
第１の導体板１０ａ及び第２の導体板１０ｂには、スタッドボルト２５ａ及び２５ｂがそれぞれ植設されている。また、第１の連結導体板２８ａ及び第２の連結導体板２８ｂは、図のように段付きに形成されており、この段付き部にはそれぞれスタッドボルトを受け入れる溝穴（図示せず）が設けられている。前記段付き部の間隔（図中Ｊ）に、ナット２６ａ及び２６ｂを緩めた積層部材（第１の導体板１０ａ、第１の絶縁板１１及び第２の導体板１０ｂ）が挿入され、ナット２６ａ及び２６ｂを締め付けることにより締結される。また、前記挿入を容易にするために第１の連結導体板２８ａ及び第２の連結導体板２８ｂにはガイド用の傾斜部（図中Ｋ）が形成されている。その他の構成は実施の形態４の図７と同様であるため説明を省略する。
【００５１】
実施の形態５の図８の構成は、実施の形態４の図７と同様の作用効果を奏すると共に、パルス電源ユニットを取り出す場合又は輸送等で電源装置と機械本体を切り離す場合には、第１の導体板１０ａ、第１の絶縁板１１及び第２の導体板１０ｂを積層組立したまま、ナット２６ａ及び２６ｂを緩め、第１の連結導体板２８ａ及び第２の連結導体板２８ｂの前記溝穴に沿って引き抜けばよいので、当該作業を非常に容易かつ確実に行うことができる。例えば、ナット２６ａ及び２６ｂは緩めるのみで外す必要が無いので、不用意に落下させる等の懸念が全く無い。また、実施の形態４の図７の構成のようなＬ形の接続部分を必要としないため、より電流経路を短くでき、小形化を図ることができる。
【００５２】
実施の形態６．
図９及び図１０は、この発明の実施の形態６に係る接続端子の構成図であり、図において、３ａ及び３ｂは端末接続手段の一例である圧着端子、７ａ及び７ｂはスタッドボルト、８ａ及び８ｂはナット、２９ａは第１の導体板、２９ｂは第２の導体板、３０ａは第１の連結導体板、３０ｂは第２の連結導体板、３１は絶縁台、３２、３３及び３４はボルト、３５は筐体等の側壁部、１０１及び１０２は同軸ケーブルである。
【００５３】
第１の導体板２９ａ、第２の導体板２９ｂ、第１の連結導体板３０ａ及び第２の連結導体板３０ｂは、実施の形態３の図５と同様にＬ形に形成されている。また、絶縁台３１は、筒状の周囲隔壁部３１ａと、この周囲隔壁部３１ａの２辺を繋ぐように一体に形成された中央隔壁部３１ｂとを有する。また、周囲隔壁部３１ａの内側と外側にそれぞれ内フランジ３１ｃと外フランジ３１ｄが一体に形成されている。
【００５４】
第１の導体板２９ａ及び第２の導体板２９ｂの接続部分は絶縁台３１の内フランジ３１ｃの周囲に重なる大きさを有し、第１の連結導体板３０ａ及び第２の連結導体板３０ｂの接続部分は絶縁台３１の内フランジ３１ｃの内側に収まる大きさを有している。
【００５５】
第１の導体板２９ａ及び第２の導体板２９ｂの接続部分の端部はボルト３２により絶縁台３１の内フランジ３１ｃと締結されており、第１の導体板２９ａ及び第２の導体板２９ｂの積層部分は絶縁台３１の中央隔壁部３１ｂを挟んで積層されている。また、第１の導体板２９ａ及び第２の導体板２９ｂの積層部分には背中合わせにスタッドボルト７ａ及び７ｂが植設されており、同軸ケーブル１０１及び１０２が圧着接続された圧着端子３ａ及び３ｂがナット８ａ及び８ｂにより締結されている。また、絶縁台３１は、外フランジ３１ｄを貫通するボルト３３により筐体等の側壁部３５と締結されている。
【００５６】
第１の連結導体板３０ａ及び第２の連結導体板３０ｂの接続部分はそれぞれボルト３４により第１の導体板２９ａ及び第２の導体板２９ｂの接続部分に締結されており、第１の連結導体板３０ａ及び第２の連結導体板３０ｂの積層部分は絶縁台３１の中央隔壁部３１ｂを挟んで積層されている。また、第１の連結導体板３０ａ及び第２の連結導体板３０ｂの積層部分には背面合わせにスタッドボルト７ａ及び７ｂが植設されており、同軸ケーブル１０１及び１０２が圧着接続された圧着端子３ａ及び３ｂがナット８ａ及び８ｂにより締結されている。
【００５７】
以上のような構成によれば、絶縁台３１の中央隔壁部３１ｂと直交する形で内フランジ３１ｃ及び外フランジ３１ｄを形成しているので、接続端子部を筐体等の側壁部３５に固定及び貫通でき、かつ、インダクタンスの小さい接続端子が得られる。また、内フランジ３１ｃ及び外フランジ３１ｄによって側壁部３５で隔てられた両側の空間を密閉隔離することができる。さらに、ボルト３４を外すことにより、簡単に接続部分の切り離しができる。
【００５８】
以上の説明においては、第１の導体板２９ａ及び第２の導体板２９ｂ並びに第１の連結導体板３０ａ及び第２の連結導体板３０ｂに、同軸ケーブル１０１及び１０２が接続されているが、いずれかをパワー基板等他の機器に直接接続される導体とすることもできる。また、同軸ケーブルの本数は、同軸ケーブル１０１及び１０２の２本に限定されるものではなく、大電流化の要求等により適宜本数を変更することができる。
【００５９】
また、以上の説明においては、第１の導体板２９ａに第１の連結導体板３０ａを連結し、第２の導体板２９ｂに第２の連結導体板３０ｂを連結する場合を示したが、このような連結を行わずに、それぞれ一個の導体で構成することもできる。この場合、この一個の導体に絶縁台の内フランジ３１ｃ等と接続するための接続部分を形成するか、又は、別部品であるＬ形の接続用部材をリベットカシメ等で固着してもよい。但し、接続部分の切り離しは同軸ケーブル１０１及び１０２を外して行うことになる。
【００６０】
また、以上の説明においては、絶縁台３１に周囲隔壁部３１ａが一体成形されている場合を示したが、この周囲隔壁部３１ａの一部を絶縁台３１と着脱可能な構成としてもよい。
【００６１】
【発明の効果】
この発明は、以上説明したように構成されているので、以下に示すような効果を奏する。
この発明に係る接続端子は、インダクタンスの増大を抑制することができるため、加工速度向上のための大電流化への対応性を向上することができる。
【００６２】
また、この発明に係る接続端子は、製造時の作業性の改善及び部品点数削減等により製造コストを低減することができると共に信頼性を向上することができる。
【００６３】
また、この発明に係る接続端子は、同軸ケーブル等の分布定数線路の本数増加を容易に行うことができる。
【００６４】
また、この発明に係る接続端子は、同軸ケーブル等の分布定数線路の導体間の絶縁距離を簡単に確保することができる。
【図面の簡単な説明】
【図１】この発明の実施の形態１に係る接続端子の構成図である。
【図２】この発明の実施の形態１に係る接続端子の締結手段の構成を説明するための部分断面図である。
【図３】この発明の実施の形態１に係る接続端子の積層部材の保持構造の一例を示す説明図である。
【図４】この発明の実施の形態２に係る接続端子の構成図である。
【図５】この発明の実施の形態３に係る接続端子の構成図である。
【図６】この発明の実施の形態３に係る接続端子の第１の導体板及び第２の導体板の構造を示す部分断面図である。
【図７】この発明の実施の形態４に係る接続端子の構成図である。
【図８】この発明の実施の形態５に係る接続端子の構成図である。
【図９】この発明の実施の形態６に係る接続端子の構成図である。
【図１０】この発明の実施の形態６に係る接続端子の構成図である。
【図１１】従来の接続端子の構成図である。
【図１２】従来の接続端子の別の構成図である。
【符号の説明】
３ａ、３ｂ圧着端子、７ａ、７ｂスタッドボルト、８ａ、８ｂナット、９ａ、９ｂ座金、１０ａ第１の導体板、１０ｂ第２の導体板、１１第１の絶縁板、１６ａ第１の導体板、１６ｂ第２の導体板、１７ａ第１の連結導体板、１７ｂ第の連結導体板、１８第２の絶縁板、２８ａ第１の連結導体板、２８ｂ第２の連結導体板、２９ａ第１の導体板、２９ｂ第２の導体板、３０ａ第１の連結導体板、３０ｂ第２の連結導体板、３１絶縁台、３１ｂ中央隔壁部、３２、３３、３４ボルト、３５筐体等の側壁部、１０１、１０２、１０３、１０４同軸ケーブル、１０１ａ、１０２ａ、１０３ａ、１０４ａ第１の導体であるコア導体、１０１ｂ、１０２ｂ、１０３ｂ、１０４ｂ第２の導体であるシールド導体。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of a connection terminal used for relaying, for example, a wiring for supplying machining power from a power supply device to a machine body in an electric discharge machine.
[0002]
[Prior art]
As an example using connection terminals, the case of an electric discharge machine will be described below. In the electric discharge machine, a connection terminal is provided because of the necessity of disconnection during transportation between the power supply device and the machine body. Further, in an electric discharge machine, a coaxial cable is generally used to supply machining power from a pulse power supply unit in a power supply device to a machining machine body. The core conductor and shield conductor of this coaxial cable are respectively passed forward and reverse currents in opposite directions, reducing the inductance by the mutual canceling action of the magnetic field due to currents in different directions, and reducing the peak value of the discharge current. By suppressing it, the reduction of the processing speed is prevented.
[0003]
FIG. 11 is a configuration diagram of a conventional connection terminal generally used in an electric discharge machine, in which 1 is a terminal block, 1a and 1b are terminal block conductors, 2 is a coaxial cable, and 2a is a core. A conductor, 2b is a shield conductor, 3a and 3b are crimp terminals, and 4 is a wire connection screw. The core conductor 2a and the shield conductor 2b are exposed and separated in the vicinity of the end of the coaxial cable 2 and are covered with an insulating tube, and the crimp terminals 3a and 3b attached to the ends of the core conductor 2a and the shield conductor 2b are connected by wiring. It is fixed to the terminal block conductor portions 1a and 1b by screws 4 for use. As described above, the core conductor 2a and the shield conductor 2b of the coaxial cable 2 are configured to be able to be connected to and disconnected from the terminal block conductor portions 1a and 1b, respectively, by the wiring connection screws 4.
[0004]
12 is another configuration diagram of a conventional connection terminal disclosed in Japanese Utility Model Laid-Open No. 2-150767. FIG. 12 (a) is a configuration diagram of a terminal block portion, and FIG. 12 (b) is a coaxial cable. It is sectional drawing which shows the connection of the contact conductor and coaxial cable which are interposed between the conductor part of a terminal block. 12, the same reference numerals as those in FIG. 11 denote the same or corresponding parts, 2c is an insulator for insulating the core conductor 2a and the shield conductor 2b, 2d is a sheath, 5a and 5b are contact conductors, and 6 is a contact conductor 5a. And 5b. The contact conductors 5a and 5b are laminated in close contact with the insulating plate 6 therebetween.
[0005]
As shown in FIG. 12B, the shield conductor 2b of the coaxial cable 2 is soldered to the side surface of the contact conductor 5b, and the core conductor 2a passes through the three members of the contact conductor 5b, the insulating plate 6 and the contact conductor 5a. After that, it is soldered to the contact conductor 5a.
[0006]
As shown in FIG. 12A, the contact conductors 5a and 5b are configured to be connected to and disconnected from the terminal block conductor portions 1a and 1b, respectively, by the wiring connection screws 4.
[0007]
[Problems to be solved by the invention]
In the conventional connection terminal configured as shown in FIG. 11, the core conductor 2 a and the shield conductor 2 b of the coaxial cable 2 are respectively connected to the terminal block conductor portions 1 a and 1 b arranged in parallel on the same plane on the connection terminal block 1. A loop space (S in the figure) is formed which is screwed, and is formed by an open portion separating the end of the coaxial cable 2 between the forward current and the backward current. In the loop space portion, the forward current and the backward path are formed. There is a problem that the magnetic field cancellation due to the current becomes insufficient, the inductance increases in this portion, and it is not possible to meet the recent demand for a large current for improving the processing speed.
[0008]
In the conventional connection terminal configured as shown in FIG. 12, the ends of the core conductor 2a and the shield conductor 2b are connected to the contact conductors 5a and 5b while being in close contact with each other, and this contact conductor is connected to the terminal block conductor portions 1a and 1b. Therefore, the loop space (S in FIG. 11) of the two coaxial cable terminals as in the configuration of FIG. 11 can be eliminated, and the inductance of the connection terminal portion can be reduced. However, in particular, the core conductor 2a must be soldered to the contact conductor 5a after passing through the contact conductor 5b, the insulating plate 6 and the contact conductor 5a, and the contact conductors 5a and 5b. There is a problem that the manufacturing cost increases due to an increase in the number of parts.
[0009]
In addition, there is a problem in that the insulation distance between the core conductor 2a and the shield conductor 2b is insufficient in the penetrating portion of the core conductor 2a.
[0010]
Furthermore, there has been a problem that no consideration has been given to the case where the number of coaxial cables is increased in order to meet the demand for a large current as described above.
[0011]
The present invention has been made to solve the above-mentioned problems, and can be manufactured by improving the workability at the time of manufacture and reducing the number of parts, etc., while being able to meet the demand for a large current for improving the processing speed. An object is to obtain a connection terminal capable of reducing the cost.
[0012]
Another object of the present invention is to obtain a connection terminal that can easily connect a distributed constant line such as a plurality of coaxial cables in order to meet the demand for a large current.
[0013]
Another object of the present invention is to obtain a connection terminal that can easily secure an insulation distance between conductors of a distributed constant line such as a coaxial cable.
[0014]
[Means for Solving the Problems]
The connection terminal according to the present invention is a connection terminal for connecting at least one distributed constant line, the first terminal connection means fixed to the terminal of the first conductor of the distributed constant line, and the distributed constant line Second terminal connecting means fixed to the terminal of the second conductor, a laminated member obtained by laminating the first conductor plate and the second conductor plate via an insulating plate, and the first conductor plate And first fastening means for connecting and disconnecting with the first terminal connecting means, and second fastening means for connecting and disconnecting with the second conductor plate and the second terminal connecting means. It is provided.
[0015]
Further, the connection terminal according to the present invention is the connection terminal connecting the first distributed constant line and the second distributed constant line, and the terminal of the first conductor of the first distributed constant line and the second distribution. A first terminal connecting means fixed together with a terminal of the second conductor of the constant line; a terminal of the second conductor of the first distributed constant line; and a first of the second distributed constant line. A second terminal connecting means that is fixed together with a terminal of the conductor; a laminated member that is formed by laminating a first conductor plate and a second conductor plate with an insulating plate interposed therebetween; and First fastening means for connecting and disconnecting the conductor plate and the first terminal connecting means, and second fastening means for connecting and disconnecting the second conductor plate and the second terminal connecting means It is equipped with.
[0016]
In the connecting terminal according to the present invention, the first fastening means is fastened to the first stud bolt, and the first terminal connecting means is fastened to the first stud bolt. And a second stud bolt in which the second fastening means is planted on the second conductor plate, and the second terminal connecting means is fastened to the second stud bolt. It is a 2nd nut for doing.
[0017]
In the connection terminal according to the present invention, the terminal connection means is a crimp terminal.
[0018]
In the connection terminal according to the present invention, the first conductor plate and the second conductor plate are provided with a connection portion for connecting to another device such as another laminated member or a power board.
[0019]
Further, the connection terminal according to the present invention is a connection terminal for connecting at least one distributed constant line, wherein the first fixing means for fixing the first conductor of the distributed constant line to the first conductor plate; A laminated member formed by laminating the second conductor plate of the distributed constant line to the second conductor plate and the first conductor plate and the second conductor plate via an insulating plate. Are provided, and the first conductor plate and the second conductor plate are provided with a connection portion for connecting to another laminated member or another device such as a power board.
[0020]
In the connection terminal according to the present invention, the outer shape of the insulating plate is formed larger than the outer shapes of the first conductor plate and the second conductor plate.
[0021]
Further, the connection terminal according to the present invention is a connection terminal for connecting at least one distributed constant line, wherein the first connection means connects the first conductor of the distributed constant line to the first conductor plate, and A second connecting means for connecting the second conductor of the distributed constant line to the second conductor plate, the first conductor plate and the second conductor plate are laminated via the first insulating plate. A first laminated member, a second laminated member formed by laminating a first connecting conductor plate and a second connecting conductor plate via a second insulating plate, the first conductor plate, and the A first fastening means for connecting and disconnecting with the first connecting conductor plate; a second fastening means for connecting and disconnecting between the second conductor plate and the second connecting conductor plate; A third connection for connecting the first connection conductor plate and the second connection conductor plate of the two laminated members to a device such as a power board. It is obtained by a means.
[0022]
Further, the connection terminal according to the present invention is a connection terminal for connecting at least one distributed constant line, wherein the first connection means connects the first conductor of the distributed constant line to the first conductor plate, and Insulation formed to have a second connecting means for connecting the second conductor of the distributed constant line to the second conductor plate, and a central partition wall portion which is an insulating plate, and to be attachable to a side wall of a device casing or the like A first laminated member formed by laminating a base, the first conductor plate and the second conductor plate via the central partition wall, a first connecting conductor plate and a second connecting conductor plate; A second laminated member formed by laminating the first partition plate with the central partition, first fastening means for fastening the first conductive plate with the insulating base, and the second conductive plate with the insulating base. Connection and disconnection of the second fastening means for fastening, the first conductor plate and the first connecting conductor plate are performed. A third fastening means, in which a fourth fastening means for connecting and disconnecting said second conductive plate and the second connecting conductor plate.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
FIG. 1 is a configuration diagram of a connection terminal according to Embodiment 1 of the present invention, in which 3a and 3b are crimp terminals which are examples of terminal connection means, 7a and 7b are stud bolts, and 8a and 8b are nuts. , 9a and 9b are washers, 10a is a first conductor plate, 10b is a second conductor plate, 11 is an insulating plate, 101 is a coaxial cable, 101a is a core conductor which is the first conductor of the coaxial cable 101, and 101b is This is a shield conductor that is the second conductor of the coaxial cable 101. The stud bolt 7a, the nut 8a and the washer 9a, and the stud bolt 7b, the nut 8b and the washer 9b constitute fastening means for fastening the crimp terminals 3a and 3b, which are terminal connection means, to the conductor plates 10a and 10b.
[0024]
FIG. 2 is a partial cross-sectional view for explaining the configuration of the fastening means, in which the same reference numerals as those in FIG. 1 denote the same or corresponding parts. The stud bolts 7a and 7b are implanted in the first conductor plates 10a and 10b. That is, the stud bolt 7a is press-fitted and fixed to the first conductor plate 10a from the insulating plate 11 side, for example, and the stud bolt 7b is press-fitted and fixed to the second conductor plate 10b from the insulating plate 11 side, for example. Yes. With such a configuration, the first conductor plate 10a, the insulating plate 11 and the second conductor plate 10b can be closely stacked, and stud bolts 7a and 7b are inserted into the holes of the crimp terminals 3a and 3b, and the nut 8a and It can be fastened by 8b.
[0025]
In FIG. 1, a core conductor 101a and a shield conductor 101b are exposed and separated in the vicinity of the end of the coaxial cable 101 and are covered with an insulating tube, and the crimp terminals 3a and 3b attached to the end are respectively connected by the fastening means. It is fixed to the plates 10a and 10b. As described above, the core conductor 101a and the shield conductor 101b of the coaxial cable 101 are configured to be connectable to and disconnected from the conductor plates 10a and 10b, respectively, by the fastening means.
[0026]
In the first conductor plate 10a and the second conductor plate 10b, machining currents (reciprocating currents) that are opposite to each other flow, and since this machining current has a high frequency, a thin and wide strip-like conductor is taken into consideration for the skin effect. Is used. For example, an insulating material such as an epoxy resin is used for the insulating plate 11, and the conductive plates 10a and 10b are laminated with the insulating plate 11 interposed therebetween. The first conductive plate 10a, the insulating plate 11 and the second conductive plate are stacked. The thickness of the laminated member 10b (D in the figure) is the minimum necessary thickness. Further, the end portion of the insulating plate 11 between the first conductor plate 10a and the second conductor plate 10b is extended from between the conductor plate 10a and the conductor plate 10b. Further, the end portions of the conductor plates 10a and 10b of the laminated member are chamfered as shown in C in the figure, and a loop space (S1 in the figure) composed of an open portion separating the end of the coaxial cable 101 is formed smaller. ing.
[0027]
Since the crimp terminals 3a and 3b are fixed to the surfaces of the conductor plates 10a and 10b of the laminated member with the joint surfaces (E in the figure) of the crimp terminals, the loop space (S1 in the figure) is, for example, a diagram of the prior art. 11 can be formed smaller than S, and an increase in inductance in the loop space portion can be suppressed. Therefore, it is possible to improve the compatibility with a large current for improving the processing speed.
[0028]
Further, since the core conductor 101a and the shield conductor 101b are fixed to the surfaces of the conductor plates 10a and 10b using the crimp terminals 3a and 3b, the contact between the core conductor 2a and the shield conductor 2b as shown in FIG. A complicated joining operation to the conductors 5a and 5b is not necessary, and the intervention of the contact conductors 5a and 5b is not necessary, and the number of parts can be reduced. Therefore, the manufacturing cost can be reduced and the reliability can be improved. Furthermore, since the edge of the insulating plate 11 between the first conductor plate 10a and the second conductor plate 10b is extended between the core conductor 101a and the shield conductor 101b, a necessary insulation distance can be easily secured. can do.
[0029]
Next, an example of the holding structure of the laminated member will be described with reference to FIG. The first conductor plate 10a and the second conductor plate 10b are provided with holes H10a and H10b at appropriate positions, respectively, and the insulating plate 11 is provided with a hole H11. An insulating bush 12 has a circular step portion 12a and a cylindrical portion 12b around the hole H12. An insulating collar 13 has a circular step portion 13a around a hole H13 that receives the cylindrical portion 12b of the insulating bush 12. The insulating bush 12 and the insulating collar 13 are fitted with the circular step 12a or 13a in the hole H10a of the first conductor plate 10a or the hole H10b of the second conductor plate 10b, respectively, and the cylindrical portion of the insulating bush 12 12b is fitted into the hole H11 of the insulating plate 11. In this assembled state, the bolt 14 and the nut 15 that pass through the hole H12 of the insulating bush 12 are tightened and fixed. Furthermore, the bolt 14 or the nut 15 can be used for fixing to a housing or the like.
[0030]
In the above description, the case where one coaxial cable is connected from one side to the laminated member composed of the first conductor plate 10a, the insulating plate 11, and the second conductor plate 10b has been shown. Also good. Since the coaxial cable can be connected to the laminated member with a simple configuration such as a crimp terminal and a fastening means, the number of coaxial cables can be easily increased to meet the demand for a large current.
[0031]
In the above description, the crimp terminal is fixed as a terminal connecting means to the ends of the core conductor and shield conductor of the coaxial cable, and the crimp terminal is connected to the first conductor plate and the second conductor plate. A conductor plate of a predetermined shape is connected to the ends of the core conductor and shield conductor of the coaxial cable by soldering or resistance welding, and the conductor plate as the terminal connection means is bolted to the first conductor plate and the second conductor plate. You may connect by such as.
[0032]
Moreover, although the case where a coaxial cable is used was shown in the above description, the same effect can be obtained when another distributed constant line such as a twisted pair cable is used.
[0033]
In the above description, the case where stud bolts and nuts are used as the fastening means has been described. However, the present invention is not limited to such fastening means, and desired insulation characteristics such as using normal bolts and nuts. And the like, as long as the terminal connection means and the conductor plate can be connected and disconnected.
[0034]
Embodiment 2. FIG.
4 is a configuration diagram of a connection terminal according to Embodiment 2 of the present invention, and the same reference numerals as those in FIG. 1 of Embodiment 1 denote the same or corresponding parts. The basic configuration of the second embodiment is the same as that of the first embodiment, and provides the same operational effects. In FIG. 4, reference numerals 102, 103 and 104 denote coaxial cables, reference numerals 102a, 103a and 104a denote core conductors which are first conductors, reference numerals 102b, 103b and 104b denote shield conductors which are second conductors, and coaxial cables 101 and 102. Are used as a set, and the coaxial cables 103 and 104 are also used as a set. Hereinafter, the coaxial cables 101 and 102 will be described as an example.
[0035]
As shown in FIG. 4B, the shield conductor 101b of the coaxial cable 101 and the core conductor 102a of the coaxial cable 102 are combined and connected to the second conductor plate 7b by the crimp terminal 3b, and the core conductor of the coaxial cable 101 is connected. 101a and the shield conductor 102b of the coaxial cable 102 are combined and connected to the first conductor plate 7a by the crimp terminal 3a. Therefore, a current in the same direction flows through the core conductor 101a of the coaxial cable 101 and the shield conductor 102b of the coaxial cable 102, and a current in the same direction flows through the core conductor 102a of the coaxial cable 102 and the shield conductor 101b of the coaxial cable 101.
[0036]
With the coaxial cable combination configuration described above, the inductance of the distributed constant line composed of this combination configuration becomes the same even when the current direction is different. In addition to the configuration of the first embodiment, the reduction in the peak value of the discharge current can be further suppressed, so that the processing speed can be further improved.
[0037]
In the above description, the case where four coaxial cables 101, 102, 103, and 104 are used and one set of coaxial cables 101 and 102 and one set of coaxial cables 103 and 104 is described. The number is not limited to four, and the number may be further increased in order to meet a demand for a large current.
[0038]
Embodiment 3 FIG.
5 is a configuration diagram of a connection terminal according to Embodiment 3 of the present invention. The same reference numerals as those in FIG. 1 of Embodiment 1 denote the same or corresponding parts. The basic configuration of the third embodiment is the same as that of the first embodiment, and the same operational effects are achieved. In FIG. 5, 16a is a first conductor plate and 16b is a second conductor plate. As in the first and second embodiments, the first conductor plate 16a, the insulating plate 11, and the second conductor plate 16b constitute a laminated member. Further, the first conductor plate 16a and the second conductor plate 16b are formed in an L shape, and are constituted by a laminated portion L1 and a connecting portion L2 as shown in FIG. A hole H16 through which a connecting bolt or the like is passed is formed in the connection portion L2.
[0039]
By providing the connection portions L2 on the conductor plates 16a and 16b, for example, the connection portions L2 can be connected to connection portions of other laminated members and can be directly connected to a device such as a power board.
[0040]
By providing such a connecting portion, it is possible to connect and disconnect at this connecting portion. Therefore, the stud bolt 7a, the nut 8a and the washer 9a, and the stud bolt 7b, the nut 8b and the washer 9b, which are fastening means in FIG. For example, a fixing means such as rivet, soldering or resistance welding may be used. When fixing the core conductor 101a and the shield conductor 101b to the conductor portions 16a and 16b using such fixing means, the work speed and the reliability of the fixing part are improved as compared with the case using the fastening means. Can be improved.
[0041]
In the above description, the first conductor plate 16a and the second conductor plate 16b are L-shaped to form the connection portion (L2). However, the shape of providing the connection portion on the conductor plate is limited to such a shape. It may be a shape that can be connected to a connection part of another laminated member or a device such as a power board.
[0042]
Embodiment 4 FIG.
7 is a configuration diagram of a connection terminal according to Embodiment 4 of the present invention. The same reference numerals as those in FIG. 5 of Embodiment 3 denote the same or corresponding parts. In FIG. 7, 11 is a first insulating plate, 17a is a first connecting conductor plate connected to the first conductor plate 16a, 17b is a second connecting conductor plate connected to the second conductor plate 16b, 18 is a second insulating plate, 19a and 19b are insulating sheets, 20 is a power board of a pulse power supply unit housed in the power supply device, 21 is a mounting bracket, 22 is a bolt, 23 is a nut, and 24 is a bolt. In addition, 12 is an insulating bush, 13 is an insulating collar, and 14 is a bolt, and has a laminated member holding structure similar to that in FIG. 3 of the first embodiment. The laminated member composed of the connecting conductor plate 17a, the second insulating plate 18, the second connecting conductor plate 17b, and the like is held.
[0043]
The first connecting conductor plate 17a and the second connecting conductor plate 17b are stacked with the second insulating plate 18 and insulating sheets 19a and 19b disposed on both sides of the second insulating plate 18 sandwiched therebetween, and the first conductor plate 16a and It has an L-shaped connection portion similar to the second conductor plate 16b, and is connected to the first conductor plate 16a and the second conductor plate 16b by bolts 22 and nuts 23, respectively.
[0044]
The opposite end portions of the L-shaped connecting portions of the first connecting conductor plate 17a and the second connecting conductor plate 17b are bent as shown in the figure, and this end portion (F in the figure) is a power board. It is inserted into a through hole formed in the output portion 20 and connected by connecting means such as soldering.
[0045]
The second insulating plate 18 is thicker than the first insulating plate 11, and is configured to recede from the L-shaped connecting portions of the first connecting conductor plate 17a and the second connecting conductor plate 17b. Therefore, the edge (G in the figure) of the insulating plate 11 protruding from between the first conductor plate 16a and the second conductor plate 16b is used as the first connection conductor plate 17a and the second connection conductor plate 17b. Can be inserted without any problem. In addition, the leading ends (H in the figure) of the insulating sheets 19a and 19b are extended to both sides of the edge (G in the figure) of the insulating plate 18, and the first connecting conductor plate 17a and the second connecting conductor in this part. The insulation distance between the conductor plate 17b can be extended. In addition, the other ends (I in the figure) of the insulating sheets 19a and 19b extend in a curved manner as shown in the figure, and insulation between the first connecting conductor plate 17a and the second connecting conductor plate 17b is ensured. Has been.
[0046]
In the above description, the case where there is one pulse power supply unit including the power substrate 20 is shown, but a plurality of units may be connected in order to obtain a larger machining current.
[0047]
In the configuration of FIG. 7, when the pulse power supply unit is taken out or when the power supply device and the machine main body are separated by transportation or the like, the first conductor plate 16 a, the insulating plate 11, and the second plate are kept connected to the coaxial cable 101. The pulse power supply unit can be taken out by removing the bolts 22 and the nuts 23 with the conductor plate 16b being laminated and assembled. Such removal or reconnection work of the bolts 22 and the like is possible by removal or fastening work of a small number of bolts or the like, and therefore can be performed more easily than removal and reconnection work of a large number of coaxial cables.
[0048]
Further, the first connecting conductor plate 17a and the second connecting conductor plate 17b are not used in the path from the power board 20 to the first conductor plate 16a and the second conductor plate 16b, and a conventional coaxial cable is not used. Since they are used and connected, particularly when a large current flows, the size can be reduced and the current path can be shortened. Further, the first conductor plate 16a, the second conductor plate 16b, the first connecting conductor plate 17a, and the second connecting conductor plate 17b are almost closely laminated and the first conductor plate 16a and the first connecting plate are connected to each other. Since the connecting portion between the conductor plate 17a and the connecting portion between the second conductor plate 16b and the second connecting conductor plate 17b are also in close contact with each other, low inductance is achieved from the power board 20 to the coaxial cable connected to the machine body. Current paths can be configured. Furthermore, the first conductor plate 16a and the second conductor plate 16b can also serve as conductors for connecting a plurality of pulse power supply units in parallel.
[0049]
Embodiment 5 FIG.
FIG. 8 is a configuration diagram of a connection terminal according to Embodiment 5 of the present invention. In the figure, the same reference numerals as those in FIG. 7 of Embodiment 4 denote the same or corresponding parts. In FIG. 8, 10a is a first conductor plate, 10b is a second conductor plate, 25a and 25b are stud bolts, 26a and 26b are nuts, 27a and 27b are washers, 28a is a first connecting conductor plate, and 28b is It is a 2nd connection conductor board.
[0050]
Stud bolts 25a and 25b are respectively implanted in the first conductor plate 10a and the second conductor plate 10b. The first connecting conductor plate 28a and the second connecting conductor plate 28b are stepped as shown in the figure, and each stepped portion has a slot (not shown) for receiving a stud bolt. Is provided. A laminated member (first conductor plate 10a, first insulating plate 11 and second conductor plate 10b) in which nuts 26a and 26b are loosened is inserted into the gap between the stepped portions (J in the figure), and nut 26a And 26b are tightened. Further, in order to facilitate the insertion, the first connecting conductor plate 28a and the second connecting conductor plate 28b are formed with a guide inclined portion (K in the figure). Since other configurations are the same as those of the fourth embodiment shown in FIG.
[0051]
The configuration of FIG. 8 of the fifth embodiment has the same effect as that of FIG. 7 of the fourth embodiment, and is the first when the pulse power supply unit is taken out or when the power supply device and the machine main body are separated by transportation or the like. While the conductive plate 10a, the first insulating plate 11 and the second conductive plate 10b are laminated and assembled, the nuts 26a and 26b are loosened, and the slot holes of the first connecting conductive plate 28a and the second connecting conductive plate 28b are formed. Therefore, the operation can be performed very easily and reliably. For example, since the nuts 26a and 26b are only loosened and do not need to be removed, there is no concern of inadvertent dropping. Further, since the L-shaped connecting portion as in the configuration of FIG. 7 of the fourth embodiment is not required, the current path can be further shortened and the size can be reduced.
[0052]
Embodiment 6 FIG.
FIGS. 9 and 10 are configuration diagrams of connection terminals according to Embodiment 6 of the present invention, in which 3a and 3b are crimp terminals which are examples of terminal connection means, 7a and 7b are stud bolts, 8a and 8b is a nut, 29a is a first conductor plate, 29b is a second conductor plate, 30a is a first connection conductor plate, 30b is a second connection conductor plate, 31 is an insulating base, 32, 33 and 34 are bolts , 35 are side walls of the housing and the like, and 101 and 102 are coaxial cables.
[0053]
The first conductor plate 29a, the second conductor plate 29b, the first connection conductor plate 30a, and the second connection conductor plate 30b are formed in an L shape as in FIG. 5 of the third embodiment. The insulating base 31 includes a cylindrical peripheral partition wall portion 31a and a central partition wall portion 31b integrally formed so as to connect two sides of the peripheral partition wall portion 31a. Further, an inner flange 31c and an outer flange 31d are integrally formed on the inner side and the outer side of the peripheral partition wall 31a, respectively.
[0054]
The connecting portion of the first conductor plate 29a and the second conductor plate 29b has a size overlapping the periphery of the inner flange 31c of the insulating base 31, and the first connection conductor plate 30a and the second connection conductor plate 30b are connected to each other. The connecting portion has a size that fits inside the inner flange 31 c of the insulating table 31.
[0055]
The end portions of the connecting portions of the first conductor plate 29a and the second conductor plate 29b are fastened to the inner flange 31c of the insulating base 31 by bolts 32, and the first conductor plate 29a and the second conductor plate 29b are connected to each other. The stacked portions are stacked with the central partition wall 31b of the insulating base 31 interposed therebetween. Further, stud bolts 7a and 7b are planted back to back in the laminated portion of the first conductor plate 29a and the second conductor plate 29b, and crimp terminals 3a and 3b to which the coaxial cables 101 and 102 are crimped are connected. It is fastened by nuts 8a and 8b. The insulating base 31 is fastened to a side wall 35 such as a housing by a bolt 33 penetrating the outer flange 31d.
[0056]
The connecting portions of the first connecting conductor plate 30a and the second connecting conductor plate 30b are fastened to the connecting portions of the first conductor plate 29a and the second conductor plate 29b by bolts 34, respectively. The laminated portions of the plate 30a and the second connecting conductor plate 30b are laminated with the central partition wall portion 31b of the insulating base 31 interposed therebetween. Further, stud bolts 7a and 7b are planted on the back surface of the laminated portion of the first connecting conductor plate 30a and the second connecting conductor plate 30b, and the crimp terminal 3a to which the coaxial cables 101 and 102 are crimped. And 3b are fastened by nuts 8a and 8b.
[0057]
According to the above configuration, the inner flange 31c and the outer flange 31d are formed so as to be orthogonal to the central partition wall portion 31b of the insulating base 31, so that the connection terminal portion is fixed to the side wall portion 35 such as a housing. A connection terminal that can penetrate and has a small inductance is obtained. Moreover, the space of both sides separated by the side wall part 35 by the inner flange 31c and the outer flange 31d can be sealed and isolated. Further, by removing the bolt 34, the connecting portion can be easily disconnected.
[0058]
In the above description, the coaxial cables 101 and 102 are connected to the first conductor plate 29a and the second conductor plate 29b, and the first connection conductor plate 30a and the second connection conductor plate 30b. It is also possible to use a conductor that is directly connected to another device such as a power board. Further, the number of coaxial cables is not limited to the two coaxial cables 101 and 102, and the number can be appropriately changed according to a demand for a large current.
[0059]
In the above description, the case where the first connecting conductor plate 30a is connected to the first conductor plate 29a and the second connecting conductor plate 30b is connected to the second conductor plate 29b is shown. Each connection may be made of one conductor without performing such connection. In this case, a connecting portion for connecting to the inner flange 31c of the insulating base or the like may be formed on this single conductor, or an L-shaped connecting member which is a separate part may be fixed by rivet caulking or the like. However, the connection portion is disconnected by removing the coaxial cables 101 and 102.
[0060]
In the above description, the peripheral partition wall 31a is integrally formed with the insulating base 31, but a part of the peripheral partition wall 31a may be detachable from the insulating base 31.
[0061]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
Since the connection terminal according to the present invention can suppress an increase in inductance, it is possible to improve the compatibility with a large current for improving the processing speed.
[0062]
Further, the connection terminal according to the present invention can reduce the manufacturing cost and improve the reliability by improving the workability at the time of manufacture and reducing the number of parts.
[0063]
The connection terminal according to the present invention can easily increase the number of distributed constant lines such as coaxial cables.
[0064]
Further, the connection terminal according to the present invention can easily secure an insulation distance between conductors of a distributed constant line such as a coaxial cable.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a connection terminal according to Embodiment 1 of the present invention.
FIG. 2 is a partial cross-sectional view for explaining the configuration of a connecting terminal fastening means according to Embodiment 1 of the present invention;
FIG. 3 is an explanatory diagram showing an example of a holding structure for a laminated member of connection terminals according to Embodiment 1 of the present invention.
FIG. 4 is a configuration diagram of a connection terminal according to Embodiment 2 of the present invention.
FIG. 5 is a configuration diagram of a connection terminal according to Embodiment 3 of the present invention.
FIG. 6 is a partial cross-sectional view showing the structure of a first conductor plate and a second conductor plate of a connection terminal according to Embodiment 3 of the present invention.
FIG. 7 is a configuration diagram of a connection terminal according to Embodiment 4 of the present invention.
FIG. 8 is a configuration diagram of a connection terminal according to Embodiment 5 of the present invention.
FIG. 9 is a configuration diagram of a connection terminal according to Embodiment 6 of the present invention.
FIG. 10 is a configuration diagram of a connection terminal according to Embodiment 6 of the present invention.
FIG. 11 is a configuration diagram of a conventional connection terminal.
FIG. 12 is another configuration diagram of a conventional connection terminal.
[Explanation of symbols]
3a, 3b crimp terminal, 7a, 7b stud bolt, 8a, 8b nut, 9a, 9b washer, 10a first conductor plate, 10b second conductor plate, 11 first insulating plate, 16a first conductor plate, 16b Second conductor plate, 17a First connecting conductor plate, 17b Second connecting conductor plate, 18 Second insulating plate, 28a First connecting conductor plate, 28b Second connecting conductor plate, 29a First conductor Plate, 29b second conductor plate, 30a first connection conductor plate, 30b second connection conductor plate, 31 insulation base, 31b central partition wall portion, 32, 33, 34 bolt, 35 side wall portion of housing, etc., 101 , 102, 103, 104 Coaxial cable, 101a, 102a, 103a, 104a Core conductor as the first conductor, 101b, 102b, 103b, 104b Shield conductor as the second conductor.

Claims

In the connection terminal for connecting the first terminal connection means fixed to the terminal of the first conductor of at least one distributed constant line, the second terminal connection means fixed to the terminal of the second conductor,
A first conductor plate in which a first stud bolt for connection with first terminal connection means of the distributed constant line is implanted;
A second conductor plate in which a second stud bolt for connection with the second terminal connection means of the distributed constant line is implanted;
An insulating plate for insulating the first conductive plate and the second conductive plate;
A first laminated member formed by laminating the first conductor plate and the second conductor plate via the insulating plate;
Fastening means for fastening the first and second terminal connecting means and the first and second stud bolts;
A connection terminal characterized by comprising:

The first terminal connecting means connects the terminal of the first conductor of the first distributed constant line and the terminal of the second conductor of the second distributed constant line together,
The second terminal connection means connects the terminal of the second conductor of the first distributed constant line and the terminal of the first conductor of the second distributed constant line together. Connection terminal.

2. The connection terminal according to claim 1, wherein the first and second stud bolts are implanted by being press-fitted and fixed to the first and second conductor plates from the insulating plate side.

The connection terminal according to claim 1, wherein the terminal connection means is a crimp terminal.

The connection part for connecting with other apparatuses, such as another laminated member or a power board, was provided in the said 1st conductor board and the 2nd conductor board, The any one of Claims 1-4 characterized by the above-mentioned. Connection terminal.

Connection terminal according to any one of claims 1 to 5, wherein said that the outer shape of the insulating plate is formed larger than the outer shape of the first conductive plate and second conductive plate.

A first connecting conductor plate connected to the connecting portion of the first conductor plate and a second connecting conductor plate connected to the connecting portion of the second conductor plate via a second insulating plate. The connection terminal according to claim 5, further comprising a second laminated member formed by laminating and connecting to a device such as a power board.

The insulating plate in the first laminated member is a central partition wall portion of an insulating base formed so as to be attachable to a side wall of the device, and a first connecting conductor plate connected to a connecting portion of the first conductor plate A second connecting conductor plate connected to a connection portion of the second conductor plate, and a second laminated member formed by laminating the central partition wall as an insulating plate, The connection terminal according to claim 5, wherein two laminated members are connected.