JP4213970B2

JP4213970B2 - Terminal block

Info

Publication number: JP4213970B2
Application number: JP2003066131A
Authority: JP
Inventors: 孝花岡
Original assignee: 東洋技研株式会社
Priority date: 2003-03-12
Filing date: 2003-03-12
Publication date: 2009-01-28
Anticipated expiration: 2023-03-12
Also published as: JP2004273382A

Description

【０００１】
【発明の属する技術分野】
本発明は、導電金具を介して複数のリード線を電気的に接続するための端子台に関するものである。
【０００２】
【従来の技術】
導電金具が絶縁性基板に横断状に装着され、かつリード線が導電金具に電気的に接続される複数の接続部を、導電金具に沿って配設してなる端子台は種々提案されている。これらの端子台は、通常、前後に重ね合わせられ、据付レール上に保持されて集合端子台を形成する（例えば、特許文献１参照。）。かかる集合端子台にあっては、複数の端子台に亘って短絡部材を接続することにより、該端子台の導電金具間を短絡可能となっており、該集合端子台を構成する各端子台にリード線及び短絡部材を適宜接続することで、リード線の接続や分岐、中継等を行い得る。
【０００３】
そして、上述の端子台にあって、各接続部が、導電金具に設けられ、導電金具の長手方向に沿って突出するＶ形刃先を備えた圧接刃部と、ほぼ上下方向のリード線挿入孔が形成され、導電金具に沿って移動して、リード線挿入孔が圧接刃部から退避する開放位置と圧接刃部と上下で重なる接続位置とに位置決めされる可動押圧片とを備え、可動押圧片を接続位置に移動することにより、該接続位置で、リード線挿入孔に挿入されたリード線を圧接刃部にくい込ませて、該リード線を導電金具に電気的に接続するようにした端子台が、本発明者により提案され、既に特許出願している（特願２００２−０９０６６２）。
【０００４】
かかる端子台にあっては、導電金具は杆状をなす単一の金属導通片よりなり、該杆状導通片の長尺方向に沿って複数設けられた個々の破断刃が、それぞれ圧接刃部を構成する。この破断刃は、長軸に沿って対向する二つの可撓辺部によって構成され、杆状導通片の長尺方向に沿って略接触状に対向する両可撓辺部の端縁を挟圧端縁とし、該挟圧端縁対の長尺方向の一側が幅方向へ傾斜状に拡開して上面Ｖ形の刃先が形成される。そして、可動押圧片のリード線挿入孔に被覆したままのリード線を挿入し、梃子作用により可動押圧片を接続位置方向へ移動すると、リード線の側縁が前記破断刃のＶ形刃先と当接する。更に可動押圧片を移動すると、Ｖ形刃先がリード線にくい込んで該リード線をその導線部が切断されない程度に破断すると同時に、リード線側縁とＶ形刃先との押圧作用により、両可撓辺部が幅方向に拡開して、リード線がその挟圧端縁間に進入する。そして、破断により露出した導線部を挟圧端縁に挟圧されて、リード線は導電金具と電気的に接続すると共に、引き抜き不可能に保持される。このように、かかる端子台では、リード線を破断刃にくい込ませるだけで、導線部の露出、及びリード線の接続、保持が行われるため、リード線に圧着端子を固着したり、その導線部を剥き出したりするなどの端末加工を要せず、リード線と導電金具との接続作業が極めて容易である。
【０００５】
【特許文献１】
特開平１０−２２４４５９号公報
【０００６】
【発明が解決しようとする課題】
ところで、上述の破断刃を構成する可撓辺部は、リード線の接続時に、幅方向に撓んでリード線を端縁間で挟圧・保持すると共に、そのＶ形刃先を形成する端縁でリード線の被覆部を破断するものであり、その形状は適度な薄さが必要とされる。このため、かかる破断刃を介して、リード線と導電金具とを接続する端子台にあっては、ねじ端子台等の他の接続機構を備える端子台に比して、リード線の導線部と導電金具との接触面積が小さく、接続したリード線に流し得る許容電流量が少ないという欠点がある。
【０００７】
本発明はかかる問題の解決を試みたものであり、上記接続機構を有する端子台にあって、大量の電流をリード線に流し得る端子台の提供を目的とする。
【０００８】
【課題を解決するための手段】
本発明は、導電金具が絶縁性基板に横断状に装着され、かつリード線が導電金具に電気的に接続される複数の接続部を、導電金具に沿って配設してなる端子台において、各接続部は、導電金具に設けられ、導電金具の長手方向に沿って突出するＶ形刃先を備えた圧接刃部と、ほぼ上下方向のリード線挿入孔が形成され、導電金具に沿って移動して、リード線挿入孔が圧接刃部から退避する開放位置と圧接刃部と上下で重なる接続位置とに位置決めされる可動押圧片とを備え、可動押圧片を接続位置に移動することにより、該接続位置で、リード線挿入孔に挿入されたリード線を圧接刃部にくい込ませ、該リード線と導電金具とを電気的に接続するようにしたものであって、前記圧接刃部は、Ｖ形刃先を導電金具の長手方向に沿って突出する複数の破断刃を上下に重ねて配設してなり、可動押圧片の接続位置で、リード線挿入孔に挿入されたリード線を各破断刃にくい込ませて、該リード線を、各破断刃を介して導電金具と複数位置で接続するものであることを特徴とする端子台である。
【０００９】
ここで、個々の破断刃は、二つの可撓辺部により構成され、略接触状に対向する挟圧端縁と、挟圧端縁の一側に形成されるＶ形刃先を備える従来構成と略同形状をなす。かかる構成にあっては、従来の端子台に比して、該リード線の導線部と、導電金具の接触面積が重ねた破断刃の枚数倍だけ増加することとなり、接続したリード線の電流許容量が増加することとなる。なお、上下の破断刃は、相互に接近させすぎると、リード線の破断部分が局所に集中し、リード線の強度が過度に低下したり、接続部でのリード線の保持力が弱くなり易いため、各破断刃は、上下に適度な間隙をおいて配設するとよい。
【００１０】
そして、かかる破断刃を複数重ねてなる圧接刃部は形状が複雑であり、従来のような単一の金属導通片には形成するのに手間がかかる。ここで、導電金具が、異なる幅の杆状導通片を、複数入れ子状に組み付けてなり、杆状導通片は、両側縁から上方へ延出されてその端部を内方へ対向状に湾曲させた二枚の可撓辺部からなる破断刃を夫々備え、且つその可撓辺部の相互に対向する端部の一側縁をＶ形刃先としており、各杆状導通片の組み付けにより、破断刃を上下に重ならせて、その複数の破断刃により、各接続部の圧接刃部を構成している。かかる構成にあっては、杆状導通片は、断面Ｕ字状や、管状をなすものであり、この杆状導通片の幅方向にサイズの異なるものを入れ子状に組み付けることにより導電金具が構成される。ここで、個々の杆状導通片は、それぞれ破断刃を備え、組み付け時に夫々の破断刃が上下に重なって圧接刃部を構成する。すなわち、幅の異なる杆状導通片を必要数だけ組み付けて導電金具を構成することにより、その導電金具の圧接刃部に必要な枚数の破断刃が配設される。そして、かかる導電金具は、複数の杆状導通片の繰り返しで構成されるものであるから、各杆状導通片を、破断刃の枚数が異なる導電金具同士で共通部品として利用することが可能であり、かかる杆状導通片を単一で用いて、従来構成の端子台の導電金具を構成することも可能である。
【００１１】
さらに、圧接刃部の各破断刃のＶ形刃先を、可動押圧片の移動方向に対して夫々異なる位置に配設した構成にあっては、リード線の接続時に可動押圧片を接続位置へ移動すると、該リード線の側縁は、上下の各破断刃の中で、Ｖ形刃先が該側縁に近いものから順次くい込んで、挟圧端縁間に進入することとなる。すなわち、リード線を複数の破断刃にくい込ませる仕事量が可動押圧片の移動方向に沿って分散されることとなり、少ない力でリード線を接続可能となる。
【００１２】
また、かかる圧接刃部の構成に応じて、可動押圧片にも新規な構成が考えられる。ここで、可動押圧片が、リード線挿入孔の上部を形成する肉厚な基部と、該基部の下部に連成されてリード線挿入孔の下部両側及び底面を形成する正面略Ｕ字状の肉薄な押圧部とを具備してなり、該押圧部の外側縦辺を該基部の下部と連結すると共に、該外側縦辺に複数の誘導薄部を形成して、可動押圧片の接続位置で、各誘導薄部を、各破断刃にくい込ませるようにした構成が提案される。ここで可動押圧片の外側とは、その開放位置で破断刃と対向する側を指し、また、誘導薄部は、リード線挿入孔に挿入されるリード線の導線部の太さよりも薄い形状をなす。かかる構成にあっては、リード線挿入孔にリード線を挿入して可動押圧片を接続位置へ移動させると、誘導薄部が、リード線より先に各Ｖ形刃先と当接し、その挟圧端縁を幅方向に押し広げて、該挟圧端縁間に進入することとなる。従って、リード線が各破断刃のＶ形刃先と当接する時点では、その挟圧端縁間は、誘導薄部の厚み分だけの隙間が生じており、該リード線を各破断刃にくい込ませるのに要する力が少なくて済む。また、圧接刃部で、各破断刃に接続・保持されたリード線を開放位置に復帰させる際には、外側縦辺がリード線の挟圧部位を外方から押圧するため、該リード線を撓ませることなく各破断刃から引抜くことが可能となる。
【００１３】
【発明の実施の形態】
本発明の一実施例を添付図面に従って説明する。
図１は、本発明の一実施例に係る端子台１を示す。この端子台１はポリカーボネイト等絶縁性樹脂材料によって板状に形成された左右対称の絶縁性基板２を主体部とする。そして該絶縁性基板２上に導電金具１６を横断状に装着し、さらに導電金具１６に設けられた圧接刃部１７，１７の内側傍に可動押圧片３０，３０を移動可能に装着することにより、端子台１の両側に、リード線８０を接続するための接続部３，３が配設される。すなわち、かかる端子台１では、可動押圧片３０，３０のリード線挿入孔３１に夫々リード線８０を挿入して、導電金具１６の左右の圧接刃部１７，１７に接続することで、該導電金具１６を介して左右のリード線８０が電気的に接続される。以下にこの端子台１の各部を詳細に説明する。
【００１４】
絶縁性基板２は、図２に示すように、背板１０から所定肉厚で画成壁４が突出することにより、座定溝面５，５などを一面側で開放状に形成してなる。すなわち、絶縁性基板２の上面は肉厚頂部７から両側へ、等角度で傾斜したへ字状をなし、その傾斜辺の内側を、画成壁４により傾斜辺に沿ってほぼ矩形状に区画された座定溝面５，５とし、さらに座定溝面５，５上を上方へ開放する結線口６，６としている。また前記座定溝面５，５の底部には、梃子棒８２（図１４，１５参照）の先端部を支持側縁９で傾動可能に支持する上方へ拡開する操作溝８が画成壁４により区画形成されている。
【００１５】
また、絶縁性基板２の画成壁４の適宜位置に連結孔５５を形成し、さらに背板１０の、該連結孔５５と対向する位置に、該連結突起（図示せず）を形成して、相互に嵌入することにより、端子台１は、前面の開放部を隣接する端子台１の背板１０で遮蔽するようにして、相互に重ね合わせ状に連結して集合端子台１１を形成する。また最端部の端子台１の画成壁４に端子台１とほぼ同一外形の端板５７が被着される。このようにして端子台１は、図３，４で示すように、上述した据付レール７０の連係突部７１，７１に連結片１５，１５を係合して、据付レール７０上に多数重ね合わせ状に連結される。さらに、この集合端子台１１を据付レール７０上で固定するために、該据付レール７０に固定金具７６，７６が螺子７７により固定される。
【００１６】
次に導電金具１６の構成について説明する。
導電金具１６は、図５に示すように、正面ヘ字状に屈曲した左右対称の杆状をなし、図１に示すように絶縁性基板２上に差し渡して装着される。この導電金具１６は、図５〜７に示すように、幅の異なる二本の杆状導通片１８，１９を入れ子状に組み付けてなり、その両側上部に、本発明の要部をなす圧接刃部１７，１７が配設される。また、導電金具１６の底面には操作溝８の開口に臨む部位を切欠して、梃子棒作動口２３，２３が形成されると共に、短絡部材（図示せず）が嵌合する副接続孔２７，２７が左右に形成されている。さらに側面には、絶縁性基板２の画成壁４と嵌合する嵌合溝２８が適宜位置に形成されている。
【００１７】
導電金具１６を構成する各杆状導通片１８，１９について、図５〜９を参照して説明すると、各杆状導通片１８，１９は、いずれも同厚の銅板を成形してなり、底面部２１ａ，２２ａと、該底面部２１ａ，２２ａの両側から起立する側面部２１ｂ，２２ｂとからなる断面Ｕ字状をなす。ここで、二つの杆状導通片１８，１９は両側面部２１ｂ，２２ｂ間の幅が夫々異なっており、幅広の外側杆状導通片１８の側面部２１ｂ，２１ｂ間に、幅狭の内側杆状導通片１９の側面部２２ｂ，２２ｂを密嵌するようにして、両杆状導通片１８，１９は入れ子状に組み付けられる。ここで両杆状導通片１８，１９には、所定位置に貫通孔２３ａ，２３ｂ，２７ａ，２７ｂや切欠２８ａ，２８ｂが形成されており、組み付け時に、各杆状導通片１８，１９の貫通孔２３ａ，２３ｂ，２７ａ，２７ｂや切欠２８ａ，２８ｂが重なって、梃子棒作動口２３や副接続孔２７、嵌合溝２８を形成するようになっている。さらに、内側杆状導通片１９の両側面部２２ｂ，２２ｂには、内方に向けて突部２５，２５が形成される。この突部２５は、後述するように可動押圧片３０の節度手段を構成する。
【００１８】
ここで本発明の要部である導電金具１６の圧接刃部１７の構成を詳細に説明する。本実施例の圧接刃部１７は、杆状導通片１８，１９に形成される各破断刃２０ａ，２０ｂを上下に重ねることによりなる。この破断刃２０ａ，２０ｂは上下で略同形状なすものであり、外側杆状導通片１８に形成される上部破断刃２０ａを例にして説明すると、上部破断刃２０ａは、外側杆状導通片１８の両側面部２１ｂ，２１ｂから上方に延出して、その上端部を内方へ対向状に湾曲させる二枚の可撓辺部２１ｃ，２１ｃより構成される。そして、可撓辺部２１ｃ，２１ｃは、その略接触状に対抗する両端縁により挟圧端縁２６ａ，２６ａを形成すると共に、該挟圧端縁２６ａ，２６ａ対を内方で幅方向に傾斜状に拡開させて上面Ｖ形の刃先２４ａを形成する。すなわち、リード線８０を内方から該上部破断刃２０ａにくい込ませると、Ｖ形刃先２４ａにより該リード線８０の被覆部８４が破断されると共に、破断して露出した導線部８３が挟圧端縁対２６ａ，２６ａで挟持されるようになっている。
【００１９】
一方の内側杆状導通片１９に形成される下部破断刃２０ｂは、前記上部破断刃２０ａと略同形状をなすが、その高さ、幅、長さ共に、上部破断刃２０ａより小さく、杆状導通片１８，１９の組み付け時に、外側杆状導通片１８の可撓辺部２１ｃ，２１ｃ間に可撓辺部２２ｃ，２２ｃが内嵌して、上部破断刃２０ａと下部破断刃２０ｂが上下に重なるようになっている。ここで、可動押圧片３０の移動方向に対して上部破断刃２０ａのＶ形刃先２４ａは、下部破断刃２０ｂのそれよりも内方に位置するように配設されており、後述するように、リード線８０の接続時に、リード線８０が上部破断刃２０ａから先にくい込むようになっている。
【００２０】
このように、幅の異なる二つの杆状導通片１８，１９を組み付けることにより導電金具１６を構成し、該導電金具１６の各圧接刃部１７を、各杆状導通片１８，１９に設けられた破断刃２０ａ，２０ｂを上下に重ねることにより構成すれば、かかる複雑な形状をなす圧接刃部１７を容易に形成できる。また、かかる各杆状導通片１８，１９は、従来の構成の端子台において、単一の破断刃からなる圧接刃部を備える導電金具を構成することもできるし、さらに幅の異なる杆状導通片と重ね合わせて、三枚以上の破断刃からなる圧接刃部を備える導電金具を構成することもできる。すなわち、かかる杆状導通片１８，１９は、多様な導電金具の共通部品として用いることできる。なお、本実施例の導電金具１６は、絶縁性基板２の形状に合わせて中央で屈折したへ字状をしているが、導電金具を屈折のない形状とすれば、各杆状導通片をより組み付け易くなる。
【００２１】
次に可動押圧片３０の構成を説明する。可動押圧片３０は、図１に示すように、夫々左右の接続部３，３にあって、導電金具１６に沿って移動可能に装着される。この可動押圧片３０は、絶縁性合成樹脂を成型してなり、図１０，１１に示すように、外側（図１０，１１中の右側）にリード線挿入孔３１が、内側（図１０，１１中の左側）に梃子棒貫通孔３２が上下方向へ夫々形成される。
【００２２】
さらに図１０〜１３に従って、詳しく述べる。尚、以下の説明では可動押圧片３０の内方とは図１０中の左方を指し、外方とは図１０中の右方を指す。前記可動押圧片３０は、正面鉤形をなす肉厚な基部３３と、該基部３３の外側下部に形成される肉薄な押圧部３４とを備える。この押圧部３４は正面略Ｕ字形をなし、この押圧部３４は内側杆状導通片１９の側面部２２ｂ，２２ｂ間に嵌入するように装着されて、可動押圧片３０の接続位置IIでは、前記内側杆状導通片１９の内部に、押圧部３４全体が嵌入する。ここで、押圧部３４の外側縦辺３４ａは基部３３の下部と連結しており、該外側縦辺３４ａに接続位置IIで破断刃２０ａ，２０ｂがくい込むこととなる。
【００２３】
前記梃子棒貫通孔３２は、基部３３の内側部に、導電金具１６の長尺方向と直交するようにして上下に貫通状に形成される。そして、ドライバー等からなる梃子棒８２を、梃子棒貫通孔３２及び梃子棒作動口２３を通し、操作溝８に挿入して傾動すると、梃子棒貫通孔３２の内面が該梃子棒８２に押圧され、可動押圧片３０が、端子台１内方の開放位置Ｉと外方の接続位置IIとの間を移動するようになっている（図１４，１５参照）。
【００２４】
また、基部３３の上面には、突成部３８が形成される。この突成部３８の上端には、前後に指標凹部９０，９０が形成されており、絶縁性基板２の結線口６，６に形成される開放位置Ｉを示すマーク３９ａや接続位置IIを示すマーク３９ｂ（図２参照）に、該指標凹部９０を一致させることにより、可動押圧片３０の開放位置Ｉと接続位置IIへの位置決めを確実に行い得るようにしている。
【００２５】
さらに、基部３３の内側端には、防塵弁４３が一体的に形成される。かかる防塵弁４３は、可動押圧片３０の接続位置IIで、その上部が左右に展開して、可動押圧片３０の接続位置IIへの変位後に、可動押圧片３０の内側端と肉厚頂部７との間に生じる間隙を導電金具１６の上方で遮蔽すると共に、その下部で梃子棒貫通孔３２を下方で遮蔽して、該梃子棒貫通孔３２から塵埃が導電金具１６上に落下するのを防止する（図１４，１５参照。）。
【００２６】
可動押圧片３０の外側部に形成される前記リード線挿入孔３１は、基部３３外側部を上下に貫通する上部の貫通部３１ａと、該貫通部３１ａの下端と連通し、前記押圧部３４の中央部に形成されて、前後に開放する下部の開放部３１ｂとからなる。そして、上述したように該押圧部３４には、接続位置IIで破断刃２０ａ，２０ｂがくい込むため、リード線挿入孔３１の開放部３１ｂ上部に、接続位置IIで破断刃２０ａ，２０ｂが横断して、リード線挿入孔３１と破断刃２０ａ，２０ｂとが上下で重なることとなる。そして、開放部３１ｂの外側に位置する押圧部３４の外側縦辺３４ａには、接続位置IIで破断刃２０ａ，２０ｂと交差する部位に、それぞれ誘導薄部４５ａ，４５ｂが形成される。かかる誘導薄部４５ａ，４５ｂは、リード線挿入孔３１に挿入されるリード線８０の導線部８３の太さよりも薄い形状をなし、可動押圧片３０を、開放位置Ｉから接続位置IIに移動させると、リード線挿入孔３１に先立って各破断刃２０ａ，２０ｂにくい込んで、リード線８０を破断刃２０ａ，２０ｂにくい込ませやすく且つその被覆８４が適切に切断されるように、破断刃２０ａ，２０ｂの挟圧端縁２６ａ，２６ｂを押し広げる（図１６参照）。
【００２７】
また、押圧部３４の底辺部の前後面には突起３６，３６が形成される。そして、この突起３６，３６は、可動押圧片３０が、開放位置Ｉや接続位置IIに位置する状態で、内側杆状導通片１９の内側面に形成される突起２５，２５と相互に当接し、可動押圧片３０を保持する節度手段を構成する。
【００２８】
次に、この端子台１の、接続部３，３への結線手順を図１４，１５に従って説明する。まずリード線８０の非接続時には、可動押圧片３０は圧接刃部１７内方の開放位置Ｉとなっている（図１４（イ）参照）。この状態で、結線口６，６からリード線８０をリード線挿入孔３１の奥まで挿入する（図１４（ロ）参照）。続いて、梃子棒貫通孔３２及び梃子棒作動口２３とから梃子棒８２を挿入し、その先端を操作溝８の底縁に当接する（図１５（ハ）参照）。そして、支持側縁９を支点として梃子棒８２を操作溝８内で傾動すると、梃子棒貫通孔３２は、梃子棒８２に対して遊びがほとんどないから、該梃子棒８２の傾動操作による回動モーメントの作用を受けて、可動押圧片３０は梃子棒貫通孔３２での梃子棒８２の幅変位に相当する分だけ導電金具１６に沿って移動して接続位置IIとなり、リード線８０が圧接刃部１７にくい込んで、導電金具１６と電気的に接続する（図１５（ニ）参照）。
【００２９】
続いて、上述の結線手順に伴う、リード線８０の接続態様を図１６，１７に従って詳細に説明する。可動押圧片３０の開放位置Ｉでは、図１６（イ）に示すように、可動押圧片３０は、圧接刃部１７の内方に位置しており、破断刃２０ａ，２０ｂはいずれも閉じた状態にある。そして、梃子棒８２の押圧作用により、可動押圧片３０が外方へ移動すると、まず、上方の誘導薄部４５ａが前記上部破断刃２０ａのＶ形刃先２４ａと当接し、Ｖ形刃先２４ａの案内作用により可撓辺部２１ｃ，２１ｃを前後に撓ませて、誘導薄部４５ａは挟圧端縁２６ａ、２６ａ間に進入する（図１６（ロ）参照）。
【００３０】
引き続き可動押圧片３０を押し進めると、該リード線８０がＶ形刃先２４ａに当接し、該Ｖ形刃先２４ａにより、該リード線８０が破断されて、その導線部８３が露出すると共に、該リード線８０の破断部位が挟圧端縁２６ａ間に進入する。また、これと同時に外側縦辺３４ａの誘導薄部４５ｂがＶ形刃先２４ｂに当接し、可撓辺部２２ｃ，２２ｃを押し広げて、挟圧端縁２６ｂ，２６ｂ間に進入する（図１７（ハ）参照）。さらに可動押圧片３０を押し進めると、リード線８０が下部破断刃２０ｂにくい込み、挟圧端縁２６ｂ，２６ｂ間に進入して、可動押圧片３０が接続位置IIとなる（図１７（ニ）参照）。
【００３１】
そして図１８に示すように、かかる接続位置IIにおいては、可撓辺部２１ｃ，２２ｃの弾性力により、リード線８０は被覆部８４の破断した部位を、各破断刃２０ａ，２０ｂの挟圧端縁２６ａ，２６ｂ間で挟圧されて、リード線８０は引抜き不可能に保持されると共に、その導線部８３と挟圧端縁２６ａ，２６ｂとの接触部を介して導電金具１６と電気的に接続する。
【００３２】
このように、かかる構成にあっては、リード線８０は二つの破断刃２０ａ，２０ｂを介して導電金具１６に接続されるため、従来構成と比べて、リード線８０と導電金具１６の接触面積が増加することとなり、接続したリード線８０により多くの電流を流すことが可能となる。また、二つの破断刃２０ａ，２０ｂを介して接続、保持するため、接続不良が起こり難く、リード線８０の保持強度も優れる。
【００３３】
尚、本発明の端子台は、上述の実施例の端子台１にのみ限定されるものではなく、本発明の要旨を逸脱しない範囲内において種々変更を加え得ることは勿論である。例えば、圧接刃部１７は、本実施例のように破断刃２０を上下に二重に重ねた構成だけでなく、三重、又はそれ以上に重ねた構成でも構わない。図１９には、変形例の圧接刃部１７の概略を示し、この圧接刃部１７’は幅の異なる四つの杆状導通片５０〜５３を入れ子状に組み付けてなる導電金具１６’に配設される。この杆状導通片５０〜５３は、前記の杆状導通片１８，１９と同形状のもので構成され、圧接刃部１７’には、各杆状導通片５０〜５３の破断刃２０ｃ〜２０ｆが上下に重ねて設けられる。そして、かかる圧接刃部１７’にくい込んだリード線８０は、四つの破断刃２０ｃ〜２０ｆを介して導電金具１６’と接続されることとなり、さらに多量の電流を該リード線８０に流し得る。
【００３４】
また、圧接刃部１７は導電金具１６に沿って接続部毎に形成されるものであるから、本実施例のように左右に接続部３を一箇所ずつ具備する端子台１に限らず、三箇所以上の接続部３を具備する端子台にも本発明は適用できる。
【００３５】
【発明の効果】
以上説明したように、本発明は、導電金具の圧接刃部が、Ｖ形刃先を導電金具の長手方向に沿って突出する複数の破断刃を上下に重ねて配設してなり、可動押圧片の接続位置で、リード線挿入孔に挿入されたリード線を各破断刃にくい込ませて、該リード線を、各破断刃を介して導電金具と複数位置で接続するものであることを特徴とする端子台であるから、導電金具に接続したリード線の導線部と、該導電金具との接触面積が広くなり、従来構成より大量の電流を該リード線に流すことができる。また、複数の破断刃を介して接続するため、接続部におけるリード線の保持強度が向上すると共に、リード線の接続不良も減少できる。
【００３６】
そして、前記導電金具は、異なる幅の杆状導通片を、複数入れ子状に組み付けてなり、該杆状導通片は、両側縁から上方へ延出されてその端部を内方へ対向状に湾曲させた二枚の可撓辺部からなる破断刃を夫々備え、かつその可撓辺部の相互に対向する端部の一側縁をＶ形刃先としており、各杆状導通片の組み付けにより、破断刃を上下に重ならせて、その複数の破断刃により、各接続部の圧接刃部を構成した場合には、上下に重なる破断刃を別々の杆状導通片で構成して、かかる杆状導通片を組み付ける形にしたことにより、複雑な形状の圧接刃部を容易に作製できる。また、導電金具を構成する各杆状導通片を、単一乃至多数の杆状導通片からなる導電金具で共通部品とすれば、導電金具の製造コストを抑えることができる。
【００３７】
ここで、圧接刃部の各破断刃のＶ形刃先を、可動押圧片の移動方向に対して夫々異なる位置に配設した場合には、リード線を各破断刃にくい込ませるのに要する仕事量が、可動押圧片の移動方向に沿って分散されるため、リード線を少ない力で圧接刃部にくい込ませることができる。
【００３８】
さらに、可動押圧片が、リード線挿入孔の上部を形成する肉厚な基部と、該基部の下部に連成され、リード線挿入孔の下部両側及び底面を形成する正面略Ｕ字状の肉薄な押圧部とを具備してなり、該押圧部の外側縦辺を該基部の下部と連結すると共に、該外側縦辺に複数の誘導薄部を形成して、可動押圧片の接続位置で、各誘導薄部を、各破断刃にくい込ませるようにした構成にあっては、リード線の接続時に、該リード線を破断刃にくい込ませる際の力が少なくて済むと共に、接続したリード線を抜き取る際に、外側縦辺が該リード線の挟圧部位を外側から押圧するため、該リード線を撓ませることなく、確実に抜き取ることができる。
【図面の簡単な説明】
【図１】本発明の端子台１を示す正面図である。尚、導電金具１６は一部切欠し、画成壁４は断面を付して示す。
【図２】絶縁性基板２の正面図である。尚、画成壁４は断面を付して示す。
【図３】集合端子台１１の平面図である。
【図４】集合端子台１１の側面図である。
【図５】導電金具１６を一部切欠して示す、正面図である。
【図６】導電金具１６の一辺側の平面図である。
【図７】導電金具１６の一辺側の側面図である。
【図８】導電金具１６の分解正面図である。尚、杆状導通片１８，１９は一部切欠して示す。
【図９】導電金具１６の分解平面図である。
【図１０】可動押圧片３０の正面図である。
【図１１】可動押圧片３０の縦断正面図である。
【図１２】図１０のＢ−Ｂ間の断面図である。
【図１３】可動押圧片３０の外方側面図である。
【図１４】導電金具１６を切欠して、接続部３，３への結線手順を示す説明図（イ），（ロ）である。尚、画成壁４は断面を付して示す。
【図１５】導電金具１６を切欠して、接続部３，３への結線手順を示す説明図（ハ），（ニ）である。尚、画成壁４は断面を付して示す。
【図１６】リード線８０の接続過程を示す説明図（イ），（ロ）である。尚、誘導薄部４５ａ、及びリード線８０は横断して示す。
【図１７】リード線８０の接続過程を示す説明図（ハ），（ニ）である。尚、誘導薄部４５ａ、及びリード線８０は横断して示す。
【図１８】リード線８０と導電金具１６を縦断して、リード線８０と圧接刃部１７との接続態様を示す概略図である。
【図１９】リード線８０と導電金具１６’を縦断して、リード線８０と圧接刃部１７’との接続態様を示す概略図である。
【符号の説明】
１端子台
２絶縁性基板
３接続部
１６，１６’ 導電金具
１７，１７’ 圧接刃部
１８外側杆状導通片
１９内側杆状導通片
２０ａ〜２０ｆ破断刃
２１ａ，２２ａ底面部
２１ｂ，２２ｂ側面部
２１ｃ，２２ｃ可撓片部
２３梃子棒作動口
２４ａ，２４ｂＶ形刃先
２６ａ，２６ｂ挟圧端縁
３０可動押圧片
３１リード線挿入孔
３３基部
３４押圧部
３４ａ外側縦辺
４５ａ，４５ｂ誘導薄部
８０リード線[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a terminal block for electrically connecting a plurality of lead wires through a conductive metal fitting.
[0002]
[Prior art]
Various terminal blocks have been proposed in which a conductive metal fitting is mounted transversely on an insulating substrate, and a plurality of connecting portions are arranged along the conductive metal fitting, and lead wires are electrically connected to the conductive metal fitting. . These terminal blocks are usually overlapped in the front-rear direction and held on a mounting rail to form a collective terminal block (see, for example, Patent Document 1). In such a collective terminal block, by connecting a short-circuit member across a plurality of terminal blocks, it is possible to short-circuit between the conductive fittings of the terminal block, and each terminal block constituting the collective terminal block is connected to each terminal block. By appropriately connecting the lead wire and the short-circuit member, the lead wire can be connected, branched, relayed, or the like.
[0003]
And in the above-mentioned terminal block, each connection part is provided in the conductive metal fitting, and the press contact blade part provided with the V-shaped cutting edge protruding along the longitudinal direction of the conductive metal fitting, and the lead wire insertion hole in the substantially vertical direction And a movable pressing piece that moves along the conductive metal fitting and is positioned at an open position where the lead wire insertion hole is retracted from the press contact blade portion and a connection position where the press contact blade portion overlaps the top and bottom. By moving the piece to the connection position, the lead wire inserted into the lead wire insertion hole is inserted into the press contact blade portion at the connection position, and the lead wire is electrically connected to the conductive metal fitting. A stand has been proposed by the present inventor and a patent application has already been filed (Japanese Patent Application No. 2002-090662).
[0004]
In such a terminal block, the conductive metal fitting is composed of a single metal conductive piece having a bowl shape, and each of the plurality of breaking blades provided along the longitudinal direction of the bowl-shaped conductive piece has a pressure contact blade portion. Configure. This breaking blade is composed of two flexible sides facing each other along the long axis, and clamps the edges of both flexible sides facing each other substantially in the contact direction along the longitudinal direction of the bowl-shaped conducting piece. An edge is formed, and one side in the longitudinal direction of the pair of pressing edges is expanded in an inclined manner in the width direction to form a V-shaped cutting edge. Then, when the lead wire that has been covered is inserted into the lead wire insertion hole of the movable pressing piece, and the movable pressing piece is moved in the direction of the connecting position by the lever action, the side edge of the lead wire contacts the V-shaped cutting edge of the breaking blade. Touch. When the movable pressing piece is further moved, the V-shaped cutting edge is inserted into the lead wire, and the lead wire is broken to such an extent that the lead wire portion is not cut. The side portion expands in the width direction, and the lead wire enters between the pinching edges. And the conducting wire part exposed by the fracture | rupture is clamped by the clamping end edge, and while connecting a lead wire electrically with an electrically-conductive metal fitting, it is hold | maintained so that extraction is impossible. In this way, in such a terminal block, the lead wire is exposed and the lead wire is connected and held only by inserting the lead wire so that the lead wire is not easily broken. It is extremely easy to connect the lead wire and the conductive metal fitting without the need for terminal processing such as stripping off.
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-224459
[0006]
[Problems to be solved by the invention]
By the way, the flexible side portion that constitutes the above-mentioned fractured blade is an edge that bends in the width direction and clamps and holds the lead wire between the edges when the lead wire is connected, and forms the V-shaped cutting edge. The covering portion of the lead wire is broken, and its shape needs to be moderately thin. For this reason, in the terminal block that connects the lead wire and the conductive metal fitting through the breaking blade, the lead wire portion of the lead wire and the terminal block provided with another connection mechanism such as a screw terminal block There are disadvantages that the contact area with the conductive metal fitting is small and the allowable current amount that can be passed through the connected lead wire is small.
[0007]
An object of the present invention is to provide a terminal block having such a connection mechanism and capable of flowing a large amount of current through a lead wire.
[0008]
[Means for Solving the Problems]
  The present invention provides a terminal block in which a plurality of connection portions, in which a conductive metal fitting is mounted transversely on an insulating substrate, and a lead wire is electrically connected to the conductive metal fitting, are disposed along the conductive metal fitting. Each connecting portion is provided on the conductive metal fitting, and is formed with a press-contacting blade portion having a V-shaped cutting edge protruding along the longitudinal direction of the conductive metal fitting and a lead wire insertion hole in a substantially vertical direction, and moves along the conductive metal fitting. The lead wire insertion hole is provided with an open position where the lead wire insertion hole is retracted from the press contact blade portion and a movable press piece positioned at a connection position where the press contact blade portion overlaps the upper and lower sides, and by moving the movable press piece to the connection position, At the connection position, the lead wire inserted into the lead wire insertion hole is inserted into the press contact blade portion so as to electrically connect the lead wire and the conductive metal fitting. A compound with a V-shaped cutting edge protruding along the longitudinal direction of the conductive metal fitting The breaker blades are arranged one above the other, and at the connecting position of the movable pressing piece, the lead wires inserted into the lead wire insertion holes are inserted into the breaker blades, and the lead wires are attached to the breaker blades. Terminal block characterized by being connected to a conductive metal fitting at multiple positions viaIt is.
[0009]
Here, each break blade is composed of two flexible sides, and has a conventional configuration including a pressing edge that is substantially contacted and a V-shaped cutting edge formed on one side of the pressing edge. It has almost the same shape. In such a configuration, the contact area of the lead wire and the conductive metal fitting is increased by the number of the number of the breaking blades overlapped as compared with the conventional terminal block, and the current allowance of the connected lead wire is increased. Capacity will increase. If the upper and lower breaking blades are too close to each other, the broken portion of the lead wire is concentrated locally, the strength of the lead wire is excessively reduced, or the holding force of the lead wire at the connecting portion is likely to be weak. For this reason, it is preferable to dispose each breaking blade with a proper gap in the vertical direction.
[0010]
  And the shape of the press-contacting blade part formed by stacking a plurality of such breaking blades is complicated, and it takes time to form a single metal conductive piece as in the prior art. Here, the conductive metal fitting is formed by assembling a plurality of bowl-shaped conductive pieces having different widths, and the bowl-shaped conductive pieces are extended upward from both side edges and bent in an opposite direction inward. Each of which is provided with a rupture blade composed of two flexible sides, and one side edge of the opposite ends of the flexible sides is a V-shaped cutting edge. The breaking blades are stacked one above the other, and the press-contacting blade portion of each connection portion is moved by the plurality of breaking blades.It is composed.In such a configuration, the bowl-shaped conducting piece has a U-shaped cross section or a tubular shape, and conductive fittings are configured by assembling parts having different sizes in the width direction of the bowl-shaped conducting piece in a nested manner. Is done. Here, each hook-shaped conductive piece includes a breaking blade, and the breaking blades overlap each other at the time of assembly to constitute the press contact blade portion. That is, by assembling a required number of bowl-shaped conductive pieces having different widths to form a conductive metal fitting, a necessary number of breaking blades are disposed on the pressure contact blade portion of the conductive metal fitting. And since this electrically-conductive metal fitting is comprised by the repetition of several hook-shaped conduction | electrical_connection pieces, it is possible to utilize each hook-shaped conduction | electrical_connection piece as a common component between the electric conduction metal fittings from which the number of fracture | rupture blades differ. In addition, it is also possible to configure a conventional terminal block conductive metal fitting using a single bowl-shaped conductive piece.
[0011]
  Furthermore, the V-shaped cutting edge of each fractured blade of the press contact blade portion is arranged at a different position with respect to the moving direction of the movable pressing piece.In that caseWhen the movable pressing piece is moved to the connection position when the lead wire is connected, the side edge of the lead wire is inserted into the upper and lower fractured blades with the V-shaped cutting edge sequentially from the side edge closer to the clamping end. It will enter between the edges. That is, the amount of work for inserting the lead wire into the plurality of broken blades is dispersed along the moving direction of the movable pressing piece, and the lead wire can be connected with a small force.
[0012]
  Moreover, a novel structure can be considered for the movable pressing piece according to the structure of the press contact blade portion. Here, the movable pressing piece has a thick base portion that forms the upper portion of the lead wire insertion hole, and a substantially U-shaped front surface that is continuous with the lower portion of the base portion to form the lower side and the bottom surface of the lead wire insertion hole. A thin pressing portion, and the outer vertical side of the pressing portion is connected to the lower portion of the base, and a plurality of guiding thin portions are formed on the outer vertical side at the connection position of the movable pressing piece. , Proposed a structure that makes each induction thin part difficult to insert into each breaking bladeIs done.Here, the outer side of the movable pressing piece refers to the side facing the breaking blade at the opened position, and the guide thin part has a shape thinner than the thickness of the lead wire part of the lead wire inserted into the lead wire insertion hole. Eggplant. In such a configuration, when the lead wire is inserted into the lead wire insertion hole and the movable pressing piece is moved to the connection position, the guiding thin portion comes into contact with each V-shaped cutting edge before the lead wire, and the clamping pressure The end edge is pushed and expanded in the width direction and enters between the pressing edge. Therefore, when the lead wire comes into contact with the V-shaped cutting edge of each breaking blade, a gap corresponding to the thickness of the guiding thin portion is formed between the clamping edges, and the lead wire is not easily inserted into each breaking blade. Less power is required. Also, when the lead wire connected to and held by each breaking blade is returned to the open position by the press contact blade portion, the outer vertical side presses the pinched portion of the lead wire from the outside. It is possible to pull out from each broken blade without bending.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 shows a terminal block 1 according to an embodiment of the present invention. The terminal block 1 is mainly composed of a bilaterally symmetric insulating substrate 2 formed in a plate shape by an insulating resin material such as polycarbonate. Then, the conductive metal fitting 16 is mounted transversely on the insulating substrate 2, and the movable pressing pieces 30, 30 are movably mounted on the inner sides of the press contact blade portions 17, 17 provided on the conductive metal fitting 16. Connection portions 3 and 3 for connecting the lead wires 80 are disposed on both sides of the terminal block 1. That is, in the terminal block 1, the lead wires 80 are inserted into the lead wire insertion holes 31 of the movable pressing pieces 30 and 30, respectively, and are connected to the left and right press contact blade portions 17 and 17 of the conductive metal fitting 16. The left and right lead wires 80 are electrically connected via the metal fitting 16. Below, each part of this terminal block 1 is demonstrated in detail.
[0014]
As shown in FIG. 2, the insulating substrate 2 is formed such that the seating groove surfaces 5, 5, etc. are opened on one side by projecting the defining wall 4 with a predetermined thickness from the back plate 10. . That is, the upper surface of the insulating substrate 2 is formed in a square shape inclined at an equal angle from the thick top portion 7 to both sides, and the inside of the inclined side is partitioned into a substantially rectangular shape along the inclined side by the defining wall 4. The seating groove surfaces 5 and 5 are connected to each other, and the connection ports 6 and 6 are opened to open the seating groove surfaces 5 and 5 upward. Further, at the bottom of the seating groove surfaces 5, 5, there is an operation groove 8 that expands upward so that the tip of the lever rod 82 (see FIGS. 14 and 15) is supported by the support side edge 9 so as to be tiltable. 4 is partitioned.
[0015]
Further, a connecting hole 55 is formed at an appropriate position of the defining wall 4 of the insulating substrate 2, and a connecting protrusion (not shown) is formed at a position of the back plate 10 facing the connecting hole 55. The terminal blocks 1 are connected to each other in a superposed manner so that the open portions on the front surface are shielded by the back plate 10 of the adjacent terminal block 1 by being fitted to each other, thereby forming the collective terminal block 11. . Further, an end plate 57 having substantially the same outer shape as that of the terminal block 1 is attached to the defining wall 4 of the terminal block 1 at the extreme end. In this way, as shown in FIGS. 3 and 4, the terminal block 1 is engaged with the connecting protrusions 71, 71 of the mounting rail 70 described above so that the connecting pieces 15, 15 are overlaid on the mounting rail 70. Connected to each other. Further, in order to fix the collective terminal block 11 on the installation rail 70, fixing brackets 76 are fixed to the installation rail 70 with screws 77.
[0016]
Next, the configuration of the conductive metal fitting 16 will be described.
As shown in FIG. 5, the conductive metal fitting 16 has a bilaterally symmetrical bowl shape that is bent in a frontal letter shape, and is mounted across the insulating substrate 2 as shown in FIG. 1. As shown in FIGS. 5 to 7, this conductive metal fitting 16 is formed by assembling two hook-shaped conductive pieces 18 and 19 having different widths in a nested manner, and press contact blades forming the main part of the present invention at the upper part of both sides. Parts 17 and 17 are provided. Further, a portion facing the opening of the operation groove 8 is cut out on the bottom surface of the conductive metal fitting 16 to form lever rod operating ports 23 and 23, and a sub-connection hole 27 into which a short-circuit member (not shown) is fitted. , 27 are formed on the left and right. Furthermore, a fitting groove 28 that fits with the defining wall 4 of the insulating substrate 2 is formed at an appropriate position on the side surface.
[0017]
Each bowl-shaped conducting piece 18, 19 constituting the conductive metal fitting 16 will be described with reference to FIGS. 5 to 9. Each bowl-shaped conducting piece 18, 19 is formed by forming a copper plate of the same thickness, It has a U-shaped cross section composed of portions 21a, 22a and side portions 21b, 22b that stand up from both sides of the bottom portions 21a, 22a. Here, the width between the two side surface portions 21b and 22b is different between the two bowl-shaped conducting pieces 18 and 19, and a narrow inner bowl-like shape is provided between the side surface parts 21b and 21b of the wide outer bowl-shaped conducting piece 18. Both hooked conductive pieces 18 and 19 are assembled in a nested manner so that the side surface portions 22b and 22b of the conductive piece 19 are closely fitted. Here, the through-holes 23a, 23b, 27a, 27b and the notches 28a, 28b are formed at predetermined positions in the two hook-like conductive pieces 18, 19, and the through-holes of the hook-like conductive pieces 18, 19 are assembled at the time of assembly. 23a, 23b, 27a, 27b and notches 28a, 28b are overlapped to form the lever rod operating port 23, the sub-connecting hole 27, and the fitting groove 28. Furthermore, protrusions 25 and 25 are formed on both side surface portions 22b and 22b of the inner bowl-shaped conductive piece 19 inward. The protrusion 25 constitutes a moderation means for the movable pressing piece 30 as will be described later.
[0018]
Here, the structure of the press-contacting blade part 17 of the conductive metal fitting 16, which is the main part of the present invention, will be described in detail. The press contact blade portion 17 of the present embodiment is formed by stacking the breaking blades 20a and 20b formed on the bowl-shaped conducting pieces 18 and 19 vertically. The breaking blades 20a and 20b have substantially the same shape in the upper and lower sides. The upper breaking blade 20a will be described by taking the upper breaking blade 20a formed on the outer hook-like conductive piece 18 as an example. The two flexible side portions 21c and 21c extend upward from both side surface portions 21b and 21b and have their upper ends bent inwardly in an opposing manner. The flexible side portions 21c and 21c are formed with pinching end edges 26a and 26a by both end edges opposed to the substantially contact state, and the pair of pinching end edges 26a and 26a are inclined inward in the width direction. The upper surface V-shaped cutting edge 24a is formed by expanding the shape. That is, when the lead wire 80 is inserted into the upper breaking blade 20a from the inside, the covering portion 84 of the lead wire 80 is broken by the V-shaped cutting edge 24a, and the conductor portion 83 exposed by breaking is exposed to the pinching end. It is sandwiched between the edge pairs 26a and 26a.
[0019]
The lower breaking blade 20b formed on one inner hook-shaped conductive piece 19 has substantially the same shape as the upper breaking blade 20a, but the height, width and length thereof are smaller than the upper breaking blade 20a, and the hook shape is When the conductive pieces 18 and 19 are assembled, the flexible side portions 22c and 22c are fitted between the flexible side portions 21c and 21c of the outer bowl-shaped conductive piece 18, and the upper breaking blade 20a and the lower breaking blade 20b are vertically moved. It is supposed to overlap. Here, the V-shaped cutting edge 24a of the upper breaking blade 20a is arranged to be located inward of that of the lower breaking blade 20b with respect to the moving direction of the movable pressing piece 30, as will be described later. When the lead wire 80 is connected, the lead wire 80 is difficult to be inserted from the upper fracture blade 20a.
[0020]
In this way, the conductive metal fitting 16 is formed by assembling the two bowl-shaped conductive pieces 18 and 19 having different widths, and the press-contact blade portions 17 of the conductive metal piece 16 are provided on the respective bowl-shaped conductive pieces 18 and 19. If the broken blades 20a and 20b are stacked one above the other, the press contact blade portion 17 having such a complicated shape can be easily formed. In addition, each of the hook-shaped conductive pieces 18 and 19 can constitute a conductive metal fitting having a press-contact blade portion made of a single broken blade in a terminal block having a conventional configuration, or a hook-shaped conductive piece having a different width. A conductive metal fitting provided with a press-contacting blade portion composed of three or more broken blades can be formed by overlapping with a piece. That is, the hook-shaped conductive pieces 18 and 19 can be used as common parts for various conductive fittings. In addition, although the electrically conductive metal fitting 16 of a present Example is carrying out the crooked shape refracted in the center according to the shape of the insulating board | substrate 2, if a conductive metal fitting is made into the shape which is not refracted, each bowl-shaped conduction piece will be shown. It becomes easier to assemble.
[0021]
Next, the configuration of the movable pressing piece 30 will be described. As shown in FIG. 1, the movable pressing piece 30 is mounted on the left and right connecting portions 3 and 3 so as to be movable along the conductive metal fitting 16. The movable pressing piece 30 is formed by molding an insulating synthetic resin. As shown in FIGS. 10 and 11, a lead wire insertion hole 31 is provided on the outside (right side in FIGS. 10 and 11) and the inside (FIGS. 10 and 11). On the left side in the middle, insulator rod through holes 32 are respectively formed in the vertical direction.
[0022]
Further details will be described with reference to FIGS. In the following description, the inner side of the movable pressing piece 30 indicates the left side in FIG. 10, and the outer side indicates the right side in FIG. The movable pressing piece 30 includes a thick base portion 33 having a front bowl shape and a thin pressing portion 34 formed at the outer lower portion of the base portion 33. This pressing portion 34 is substantially U-shaped in the front, and this pressing portion 34 is mounted so as to be fitted between the side surface portions 22b, 22b of the inner hook-shaped conductive piece 19, and at the connection position II of the movable pressing piece 30, The entire pressing portion 34 is fitted inside the inner bowl-shaped conductive piece 19. Here, the outer vertical side 34a of the pressing portion 34 is connected to the lower portion of the base portion 33, and the breaking blades 20a and 20b are inserted into the outer vertical side 34a at the connection position II.
[0023]
The lever rod through hole 32 is formed in the inner portion of the base portion 33 in a vertically penetrating manner so as to be orthogonal to the longitudinal direction of the conductive metal fitting 16. Then, when the lever rod 82 made of a driver or the like is inserted into the operation groove 8 through the lever rod through hole 32 and the lever rod operating port 23 and tilted, the inner surface of the lever rod through hole 32 is pressed against the lever rod 82. The movable pressing piece 30 is configured to move between an open position I inside the terminal block 1 and an external connection position II (see FIGS. 14 and 15).
[0024]
A projecting portion 38 is formed on the upper surface of the base portion 33. At the upper end of the protruding portion 38, index concave portions 90, 90 are formed in the front and rear, and a mark 39a indicating the open position I and the connection position II formed in the connection ports 6, 6 of the insulating substrate 2 are shown. By aligning the index recess 90 with the mark 39b (see FIG. 2), the movable pressing piece 30 can be reliably positioned at the open position I and the connection position II.
[0025]
Further, a dustproof valve 43 is integrally formed at the inner end of the base portion 33. The dustproof valve 43 is connected to the movable pressing piece 30 at the connection position II, and the upper part of the dustproof valve 43 expands left and right, and after the movable pressing piece 30 is displaced to the connection position II, the inner end of the movable pressing piece 30 and the thick top 7. The gap formed between the metal rod 16 is shielded above the conductive metal fitting 16 and the insulator rod through-hole 32 is shielded below the conductive metal fitting 16 so that dust falls from the metal rod through hole 32 onto the conductive metal fitting 16. (See FIGS. 14 and 15).
[0026]
The lead wire insertion hole 31 formed in the outer portion of the movable pressing piece 30 communicates with an upper penetrating portion 31a that vertically penetrates the outer portion of the base portion 33 and a lower end of the penetrating portion 31a. It consists of a lower opening portion 31b formed at the center and opening back and forth. As described above, since the breaking blades 20a and 20b bite into the pressing portion 34 at the connection position II, the breaking blades 20a and 20b cross at the connection position II above the open portion 31b of the lead wire insertion hole 31. Thus, the lead wire insertion hole 31 and the breaking blades 20a and 20b overlap vertically. Then, on the outer vertical side 34a of the pressing portion 34 located outside the opening portion 31b, guide thin portions 45a and 45b are respectively formed at portions that intersect the breaking blades 20a and 20b at the connection position II. The guide thin portions 45a and 45b have a shape thinner than the thickness of the lead wire portion 83 of the lead wire 80 inserted into the lead wire insertion hole 31, and move the movable pressing piece 30 from the open position I to the connection position II. Prior to the lead wire insertion hole 31, the break blades 20a, 20b are inserted into the break blades 20a, 20b so that the lead wire 80 is easily inserted into the break blades 20a, 20b and the covering 84 is appropriately cut. The pressing edges 26a and 26b of 20b are pushed wide (see FIG. 16).
[0027]
Protrusions 36 are formed on the front and rear surfaces of the bottom side of the pressing portion 34. The protrusions 36 and 36 abut against the protrusions 25 and 25 formed on the inner surface of the inner hook-shaped conductive piece 19 in a state where the movable pressing piece 30 is located at the open position I or the connection position II. The moderation means for holding the movable pressing piece 30 is configured.
[0028]
Next, a procedure for connecting the terminal block 1 to the connecting portions 3 and 3 will be described with reference to FIGS. First, when the lead wire 80 is not connected, the movable pressing piece 30 is in the open position I inside the press contact blade portion 17 (see FIG. 14 (A)). In this state, the lead wire 80 is inserted into the lead wire insertion hole 31 from the connection ports 6 and 6 (see FIG. 14B). Subsequently, the lever rod 82 is inserted from the lever rod through-hole 32 and the lever rod operating port 23, and the tip thereof is brought into contact with the bottom edge of the operation groove 8 (see FIG. 15C). Then, when the lever rod 82 is tilted in the operation groove 8 with the support side edge 9 as a fulcrum, the lever rod through hole 32 has little play with respect to the lever rod 82, and therefore the lever rod 82 is rotated by the tilting operation. Under the action of the moment, the movable pressing piece 30 moves along the conductive metal fitting 16 by an amount corresponding to the width displacement of the lever rod 82 in the lever rod through-hole 32 and becomes the connection position II. The portion 17 is inserted and electrically connected to the conductive metal fitting 16 (see FIG. 15D).
[0029]
Subsequently, the connection mode of the lead wire 80 in accordance with the above-described connection procedure will be described in detail with reference to FIGS. In the open position I of the movable pressing piece 30, as shown in FIG. 16 (a), the movable pressing piece 30 is located inward of the press contact blade portion 17, and the breaking blades 20a and 20b are both closed. It is in. When the movable pressing piece 30 moves outward due to the pressing action of the lever rod 82, the upper guide thin portion 45a first comes into contact with the V-shaped cutting edge 24a of the upper breaking blade 20a, and the V-shaped cutting edge 24a is guided. The flexible side portions 21c and 21c are bent back and forth by the action, and the guiding thin portion 45a enters between the pinching end edges 26a and 26a (see FIG. 16B).
[0030]
When the movable pressing piece 30 is further pushed forward, the lead wire 80 comes into contact with the V-shaped cutting edge 24a, the lead wire 80 is broken by the V-shaped cutting edge 24a, and the lead wire portion 83 is exposed. 80 breakage sites enter between the clamping edge 26a. At the same time, the guiding thin part 45b of the outer vertical side 34a abuts on the V-shaped cutting edge 24b, spreads the flexible side parts 22c and 22c, and enters between the pressing edges 26b and 26b (FIG. 17 ( See c). When the movable pressing piece 30 is further pushed forward, the lead wire 80 is inserted into the lower breaking blade 20b and enters between the clamping edges 26b and 26b, and the movable pressing piece 30 becomes the connection position II (see FIG. 17D). ).
[0031]
Then, as shown in FIG. 18, at the connection position II, the lead wire 80 causes the portion of the covering portion 84 to be broken by the elastic force of the flexible side portions 21c and 22c, and the pinching ends of the breaking blades 20a and 20b. The lead wire 80 is held between the edges 26a and 26b so that the lead wire 80 cannot be pulled out, and is electrically connected to the conductive metal fitting 16 through a contact portion between the lead wire portion 83 and the pinching end edges 26a and 26b. Connecting.
[0032]
In this way, in this configuration, the lead wire 80 is connected to the conductive metal fitting 16 via the two breaking blades 20a and 20b, so that the contact area between the lead wire 80 and the conductive metal fitting 16 is compared with the conventional configuration. As a result, a larger amount of current can flow through the connected lead wire 80. Moreover, since it connects and hold | maintains via the two fracture | rupture blades 20a and 20b, a connection failure does not occur easily and the holding strength of the lead wire 80 is also excellent.
[0033]
In addition, the terminal block of this invention is not limited only to the terminal block 1 of the above-mentioned Example, Of course, a various change can be added in the range which does not deviate from the summary of this invention. For example, the press contact blade portion 17 may have not only a configuration in which the rupture blades 20 are vertically stacked in a double manner as in the present embodiment, but also a configuration in which triple or more layers are stacked. FIG. 19 shows an outline of a pressure-contact blade portion 17 of a modified example, and this pressure-contact blade portion 17 ′ is disposed on a conductive metal fitting 16 ′ formed by assembling four hook-shaped conductive pieces 50 to 53 having different widths. Is done. The hook-like conductive pieces 50 to 53 are formed in the same shape as the hook-like conductive pieces 18 and 19 described above, and the press-contacting blade portion 17 ′ has break blades 20 c to 20 f of the hook-like conductive pieces 50 to 53. Are provided one above the other. Then, the lead wire 80 which is difficult to press against the press contact blade portion 17 ′ is connected to the conductive metal fitting 16 ′ via the four breaking blades 20 c to 20 f, and a larger amount of current can flow through the lead wire 80.
[0034]
Further, since the press contact blade portion 17 is formed for each connection portion along the conductive metal fitting 16, it is not limited to the terminal block 1 having one connection portion 3 on each of the left and right as in this embodiment. The present invention can also be applied to a terminal block provided with more than three connection portions 3.
[0035]
【The invention's effect】
  As described above, according to the present invention, the press contact blade portion of the conductive metal fitting is formed by arranging a plurality of broken blades with a V-shaped cutting edge protruding along the longitudinal direction of the conductive metal metal, vertically, The lead wire inserted into the lead wire insertion hole is inserted into the breaker blade at the connection position of the lead wire, and the lead wire is connected to the conductive metal fitting at a plurality of positions via the breaker blades. Terminal blockbecause there is,The contact area between the conductive wire portion of the lead wire connected to the conductive metal fitting and the conductive metal fitting becomes wide, and a larger amount of current can flow through the lead wire than in the conventional configuration. Further, since the connection is made via a plurality of breaking blades, the holding strength of the lead wire at the connecting portion is improved and the connection failure of the lead wire can be reduced.
[0036]
  The conductive metal fitting is formed by assembling a plurality of hook-shaped conductive pieces having different widths, and the hook-shaped conductive pieces are extended upward from both side edges so that the end portions thereof face inward. Each of the curved cutting edges is made up of two flexible sides, and one side edge of each end of the flexible sides facing each other is a V-shaped cutting edge. In addition, the breaking blades overlap each other, and the plurality of breaking blades constitute the pressure contact blade portion of each connection portion.in case of,By composing the breaking blades that overlap vertically with separate hook-shaped conductive pieces and assembling such hook-shaped conductive pieces, it is possible to easily produce a pressure-contact blade portion having a complicated shape. Further, if each of the hook-shaped conductive pieces constituting the conductive metal fitting is a common component made of a single or many hook-shaped conductive pieces, the manufacturing cost of the conductive metal fitting can be suppressed.
[0037]
  Here, the V-shaped cutting edge of each fractured blade of the press contact blade portion is disposed at a different position with respect to the moving direction of the movable pressing piece.in case of,Since the work required to insert the lead wire into each broken blade is dispersed along the moving direction of the movable pressing piece, the lead wire can be inserted into the press contact blade portion with a small force.
[0038]
  Further, the movable pressing piece is connected to the thick base portion that forms the upper portion of the lead wire insertion hole and the lower portion of the base portion, and is a thin U-shaped thin wall that forms both sides and the bottom surface of the lower portion of the lead wire insertion hole. And connecting the outer vertical side of the pressing part to the lower part of the base, and forming a plurality of thin guide portions on the outer vertical side, at the connection position of the movable pressing piece, Each induction thin part has a structure that makes it difficult to insert each breaking blade.In that caseWhen connecting the lead wire, less force is required to insert the lead wire into the cutting blade, and when the connected lead wire is pulled out, the outer vertical side presses the pinched portion of the lead wire from the outside. The lead wire can be reliably pulled out without bending.
[Brief description of the drawings]
FIG. 1 is a front view showing a terminal block 1 of the present invention. The conductive metal fitting 16 is partially cut away, and the defining wall 4 is shown with a cross section.
FIG. 2 is a front view of an insulating substrate 2; The defining wall 4 is shown with a cross section.
3 is a plan view of the collective terminal block 11. FIG.
4 is a side view of the collective terminal block 11. FIG.
FIG. 5 is a front view showing the conductive metal fitting 16 with a part cut away.
6 is a plan view of one side of the conductive metal fitting 16. FIG.
7 is a side view of one side of the conductive metal fitting 16. FIG.
FIG. 8 is an exploded front view of the conductive metal fitting 16; The bowl-shaped conducting pieces 18 and 19 are partially cut away.
9 is an exploded plan view of the conductive metal fitting 16. FIG.
10 is a front view of the movable pressing piece 30. FIG.
11 is a longitudinal front view of the movable pressing piece 30. FIG.
12 is a cross-sectional view taken along the line BB in FIG.
13 is an outer side view of the movable pressing piece 30. FIG.
FIGS. 14A and 14B are explanatory views (A) and (B) showing a procedure for connecting to the connecting portions 3 and 3 by cutting the conductive metal fitting 16; FIG. The defining wall 4 is shown with a cross section.
FIGS. 15A and 15B are explanatory views (c) and (d) showing a connection procedure to the connecting portions 3 and 3 by cutting the conductive metal fitting 16; The defining wall 4 is shown with a cross section.
FIGS. 16A and 16B are explanatory views (a) and (b) showing a connection process of the lead wire 80. FIGS. In addition, the induction | guidance | derivation thin part 45a and the lead wire 80 are shown transversely.
FIGS. 17A and 17B are explanatory views (c) and (d) showing a connection process of the lead wire 80. FIGS. In addition, the induction | guidance | derivation thin part 45a and the lead wire 80 are shown transversely.
FIG. 18 is a schematic diagram showing a connection mode between the lead wire 80 and the press contact blade portion 17 by vertically cutting the lead wire 80 and the conductive metal fitting 16;
FIG. 19 is a schematic view showing a connection mode between the lead wire 80 and the press contact blade portion 17 ′ by longitudinally cutting the lead wire 80 and the conductive metal fitting 16 ′.
[Explanation of symbols]
1 Terminal block
2 Insulating substrate
3 connections
16, 16 'conductive metal fittings
17, 17 'pressure contact blade
18 Outer bowl-shaped conducting piece
19 Inner bowl-shaped conductive piece
20a-20f Breaking blade
21a, 22a Bottom part
21b, 22b Side surface
21c, 22c Flexible piece
23 Insulator bar opening
24a, 24b V-shaped cutting edge
26a, 26b clamping edge
30 Movable pressing piece
31 Lead wire insertion hole
33 Base
34 Pressing part
34a Outside vertical side
45a, 45b Induction thin section
80 lead wire

Claims

In the terminal block in which the conductive metal fitting is mounted transversely on the insulating substrate and the lead wire is electrically connected to the conductive metal fitting, and a plurality of connection portions arranged along the conductive metal fitting,
Each connection is
A pressure-contact blade portion provided with a V-shaped cutting edge provided on the conductive metal fitting and protruding along the longitudinal direction of the conductive metal fitting;
A substantially vertical lead wire insertion hole is formed and moves along the conductive metal fitting so that the lead wire insertion hole is positioned at an open position where the lead wire insertion hole is retracted from the press contact blade portion and a connection position where the press contact blade portion overlaps vertically. A pressing piece,
By moving the movable pressing piece to the connection position, the lead wire inserted into the lead wire insertion hole is inserted into the press contact blade portion at the connection position, and the lead wire and the conductive metal fitting are electrically connected. Which was
The press contact blade portion is formed by arranging a V-shaped cutting edge with a plurality of broken blades protruding vertically along the longitudinal direction of the conductive metal fitting, and inserted into the lead wire insertion hole at the connection position of the movable pressing piece. The lead wire is inserted into each breaking blade, and the lead wire is connected to the conductive metal fitting at a plurality of positions through the breaking blades .
Further, the conductive metal fitting is formed by assembling a plurality of bowl-shaped conductive pieces of different widths in a nested manner,
Each of the hook-shaped conductive pieces includes a breaking blade composed of two flexible side portions that extend upward from both side edges and have end portions curved inwardly in opposition, and the flexible side portions. One side edge of the mutually opposite end portion is a V-shaped cutting edge,
A terminal block characterized in that, by assembling each hook-shaped conductive piece, the breaking blades are overlapped vertically, and the press-contacting blade portion of each connection portion is constituted by the plurality of breaking blades .

The terminal block according to claim 1 , wherein the V-shaped cutting edge of each fractured blade of the press contact blade portion is disposed at a different position with respect to the moving direction of the movable pressing piece.

The movable pressing piece has a thick base that forms the upper part of the lead wire insertion hole,
It comprises a thin U-shaped pressing part that is coupled to the lower part of the base part and forms the lower both sides and the bottom face of the lead wire insertion hole,
The outer vertical side of the pressing portion is connected to the lower portion of the base, and a plurality of thin guide portions are formed on the outer vertical side, and each guide thin portion is connected to each breaking blade at the connection position of the movable pressing piece. terminal block according to請Motomeko 1 or claim 2 so as to bite into.