JP4079790B2

JP4079790B2 - Terminal block

Info

Publication number: JP4079790B2
Application number: JP2003026254A
Authority: JP
Inventors: 孝花岡
Original assignee: 東洋技研株式会社
Priority date: 2003-02-03
Filing date: 2003-02-03
Publication date: 2008-04-23
Anticipated expiration: 2023-02-03
Also published as: JP2004241151A

Description

【０００１】
【発明の属する技術分野】
本発明は、複数のリード線を導通片を介して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】
杆状導通片を絶縁性基板に横断状に装着し、リード線が杆状導通片に電気的に接続される複数の接続部を、杆状導通片に沿って具備する端子台は種々提案されている。これらの端子台は、前後に重ね合わせられて、据付レール上に保持される（例えば、特許文献１参照。）。
【０００３】
また、上述の端子台にあって、各接続部は、杆状導通片に一体的に形成されて刃先を導通片の長手方向に沿って突出するＶ形破断刃と、ほぼ上下方向のリード線挿入孔が形成され、杆状導通片に沿って移動して、リード線挿入孔がＶ形破断刃から退避する開放位置とＶ形破断刃と上下に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た構成が、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】
かかる構成にあっては、杆状導通片の両側縁から、上端部を内方へ延出した可撓辺部を対向状に立設して、その対向端をほぼ接触させ、かつ両対向端の内縁に傾斜刃先を夫々形成して、該両傾斜刃先によりＶ形破断刃が構成される。また、可動押圧片は、リード線挿入孔の上部を形成する肉厚な基部と、該基部の下方に配設されてリード線挿入孔の下部を形成し、接続位置で、可撓辺部に嵌入する肉薄の押圧部とを備え、該基部と押圧部との間に、リード線挿入孔を横断するようにしてＶ形破断刃の嵌入部位が間隙状に形成される。この端子台のリード線挿入孔にリード線を被覆されたままで挿入し、梃子棒の傾動作用等により可動押圧片を接続位置へ移動すると、前記嵌入部位に進入したＶ形破断刃２２と、リード線挿入端とが当接する。そして、傾斜刃先対がリード線にくい込んで導線が切断されない程度に被覆が破断されると同時に、リード線挿入端が該傾斜刃先対の案内作用により可撓片部を外方に押し広げて対向端間に進入して、該導線を対向端縁間に挟圧されることにより、リード線は杆状導通片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ととなる。このように、かかる端子台ではリード線に圧着端子を固着したり、導線を剥き出しとするなどの加工を要せず、リード線の接続を簡便に行い得る。
【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、上述の端子台にあっては、杆状導通片の可撓辺部の両対向端が相互に接触していると、傾斜刃先対が外方で閉じた形状となる。このため、リード線を該傾斜刃先対にくい込ませて、対向端間に挿入するのに大きな力を要すると共に、リード線が不必要に破断され、接続時に加わる引張り力等によりリード線が破断部位で切断し易くなるという問題がある。こうした問題を解決するために、可撓辺部の対向端間に間隙を有するように杆状導通片を成形して、リード線を対向端間に嵌入し易くすると共に、リード線を必要部分だけ破断するようにした端子台が提案されている。しかし、かかる構成にあっては、杆状導通片の成形時にその間隙幅を均一に形成するのは難しく、該間隙幅の差異により端子台毎にリード線の破断具合にムラができ易いという問題が生じている。
【０００７】
本発明はかかる問題の解決を試みたものであって、リード線の接続時に、該リード線の被覆を確実かつ容易に破断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、杆状導通片を絶縁性基板に横断状に装着し、リード線が杆状導通片に電気的に接続される複数の接続部を、杆状導通片に沿って具備する端子台において、各接続部は、杆状導通片に一体的に形成されて刃先を導通片の長手方向に沿って突出するＶ形破断刃と、ほぼ上下方向のリード線挿入孔が形成され、杆状導通片に沿って移動して、リード線挿入孔がＶ形破断刃から退避する開放位置とＶ形破断刃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Ｖ形破断刃にくい込ませて、その導線と杆状導通片とを電気的に接続するようにしたものにあって、杆状導通片の両側縁から、上端部を内方へ延出した可撓辺部を対向状に立設して、その対向端をほぼ接触させ、かつ両対向端の内縁に傾斜刃先を夫々形成して、両傾斜刃先によりＶ形破断刃を構成すると共に、可動押圧片のＶ形破断刃への嵌入部位の、リード線挿入孔の外側傍位置に形成され、可動押圧片の接続位置で、傾斜刃先対の間にくい込んで、両対向端の間を所定幅に押し広げる誘導薄片を備えることを特徴とする端子台である（請求項１）。
【０００９】
ここで可動押圧片の外側とは、開放位置でＶ形破断刃と対向する側を指し、可動押圧片の内側とはその反対側を指す。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、誘導薄片が、リード線より先にＶ形破断刃と当接し、傾斜刃先の案内作用により、両可撓片部を両脇に押し広げて、該可撓片部の対向端間に進入する。従って、リード線がＶ形破断刃と当接する時点では、該傾斜刃先対の間には、誘導薄片の厚み分だけの隙間が生じていることとなる。このように、可撓辺部の対向端間に間隙を予め形成しなくても、リード線の接続時には、該誘導薄片が、対向端縁間に嵌入して常に一定幅の間隙を形成するから、リード線を少ない力で対向端間に挿入可能となると共に、リード線を好適な破断具合で安定して破断することが可能となる。
【００１０】
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、該基部の下部に配設され、リード線挿入孔の下部両側及び下面を形成する正面略Ｕ字状の肉薄な押圧部とを具備すると共に、前記誘導薄片が、押圧部の外側縦辺の上端と、基部との間に上下に差し渡して一体的に連成される構成としてもよい（請求項２）。かかる構成にあっては、誘導薄片により、押圧部の外側縦辺の上端と基部とを連結することにより、肉薄な押圧部の構造がより安定したものとなる。
【００１１】
また、可動押圧片のＶ形破断刃への嵌入部位の、リード線挿入孔の内側傍位置に上下に差し渡して形成され、可動押圧片の接続位置で、前記対向端の間に嵌入する支持薄片を備えることも提案される（請求項３）。かかる構成にあっては、リード線をＶ形破断刃に押圧して破断する際に、該リード線の破断部位の直内側部が該支持薄片により支持されるため、リード線が撓み難く、リード線の破断態様が安定することとなる。
【００１２】
【発明の実施の形態】
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、杆状導通片２０及び可動押圧片３０，３０を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８０，８０を挿入して、杆状導通片２０の左右の側部に接続することで、該杆状導通片２０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。
【００１３】
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する。すなわち、絶縁性基板２の上面は逆三角状の肉厚頂部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、可動押圧片３０の変位に際して挿入される梃子棒８２（図１７，１８参照）の先端部をその支持側縁９で傾動可能に支持する上方へ開放する操作溝８が画成壁４により区画形成されている。
【００１４】
また、絶縁性基板２の周囲に形成された画成壁４の前面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相互は重ね合わせ状に連結される。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、この端子台列を据付レール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。
【００１５】
杆状導通片２０は銅合金等よりなり、図１に示すように、絶縁性基板２の座定溝面５，５に差し渡して装着され、絶縁性基板２の背板１０に対して、へ字状に屈曲した杆状をなす。そして、この杆状導通片２０は、図５〜８で示すように、各座定溝面５，５に装着される各辺部にあって、底面部２１ａと、該底面部２１ａの両側から起立する側面部２１ｂ，２１ｂとからなる断面コ字状をなす。そして、底面部２１ａ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を形成している。側面部２１ｂ，２１ｂには、可動押圧片３０と係合する係合突起２５，２５が内方に向けて突成され、さらに側面部２１ｂ，２１ｂの両側縁には、可撓辺部２１ｃ，２１ｃが立設される。
【００１６】
前記可撓辺部２１ｃ，２１ｃは、上端部を図７中の内方へ対向状に湾曲させ、その対向端２４，２４を中間位置で相互に接触する。そして図５、６に示すように、該対向端２４，２４の内縁から、夫々両側下方へ弧状に傾斜する傾斜刃先２６，２６が形成されており、この上面Ｖ形をなす傾斜刃先２６，２６対により、リード線８０を破断するＶ形破断刃２２が構成される。そして、後述するように、かかる可撓辺部２１ｃ，２１ｃでは、該Ｖ形破断刃２２にリード線８０を内方から押し付けると、該傾斜刃先２６，２６の案内作用により、可撓辺部２１ｃ，２１ｃが図７中の外方に撓み、両対向端２４，２４間に間隙を生じて、該間隙に嵌入したリード線８０を該対向端２４，２４間で挟圧し保持するようになっている。
【００１７】
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、杆状導通片２０の側面部２１ｂ，２１ｂ間に、該杆状導通片２０に沿って移動可能に装着される。この可動押圧片３０は、表裏対称に形成されたナイロン等の絶縁性合成樹脂材料よりなり、図９，１０に示すように、外側（図９，１０中の右側）にリード線挿入孔３１が、内側（図９，１０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。また、リード線挿入孔３１と梃子棒貫通孔３２との間には、作動孔４４が上下方向に形成されており、この作動孔４４内には、後述するリード線挿入確認片４５が昇降可能に保持される。
【００１８】
さらに図９〜１５に従って、詳しく述べる。なお、以下の説明では、可動押圧片３０の内方とは図９中の左方を指す。
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、正面略Ｕ字形をなす肉薄な押圧部３４とを備える。この押圧部３４は杆状導通片２０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、前記杆状導通片２０の側面部２１ｂ,２１ｂ及び可撓辺部２１ｃ，２１ｃ間に、押圧部３４全体が嵌入する。すなわち、該押圧部３４の上縁と基部３３の外側部下縁との間に、接続位置IIでＶ形破断刃２２がくい込み、進入することとなり、かかる位置に本発明にかかる嵌入部位ｓが形成される。
【００１９】
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が開放位置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。
【００２０】
前記梃子棒貫通孔３２は、基部３３の内側部に、杆状導通片２０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、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１７，１８参照）。
【００２１】
また、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貫通部３１ａと、該貫通部３１ａの下端と連通し、押圧部３４内で前後に開放する開放部３１ｂとからなり、該開放部３１ｂの下部をリード線挿入端８１の座定位置Ｘとしている。
【００２２】
そして、開放部３１ｂの外側面を形成する押圧部３４の外側縦辺３４ａには、舌片状のリード線保持片４６が、座定位置Ｘへ向けて突成される。かかるリード線保持片４６は、リード線８０の挿入時に、リード線挿入端８１に弾接して、該リード線挿入端８１を開放部３１ｂの内側面に押し付けて、該リード線挿入端８１を座定位置Ｘに押し止めるようになっている（図１６参照）。
【００２３】
また、押圧部３４の底辺の前後面には突起３６，３６が形成される。この突起３６，３６は、杆状導通片２０に形成される係合突起２５と、可動押圧片３０の開放位置Ｉや接続位置IIで夫々係合して、可動押圧片３０を保持する節度手段を構成する。
【００２４】
次にリード線挿入確認片４５、及び該リード線挿入確認片４５を変位させる確認片変位手段について、図９〜図１５に従って説明する。確認片変位手段は、リード線挿入確認片４５を昇降可能に保持する作動孔４４と、リード線挿入端８１の押圧作用によりリード線挿入確認片４５を上昇させる傾動変換片４２により構成される。
【００２５】
リード線挿入確認片４５は、図９，１０に示すように、下部に切欠部９１が形成された上下に長い杆状をなし、可動押圧片３０の作動孔４４内に昇降可能に保持される。この作動孔４４は、可動押圧片３０の中央部に上下に形成されており、その断面は、嵌入するリード線挿入確認片に対して、遊びのない形状となっている。そして、作動孔４４の上端は、突成部３８の上面に開口し、その上方をリード線挿入確認片４５上端の確認位置Ｙとする。一方、作動孔４４の下端は、その外側を押圧部３４の内側辺３４ｂに開口し、保持するリード線挿入確認片４５の切欠部９１を、リード線挿入孔３１の開放部３１ｂに露出する。また、可動押圧片３０は赤色樹脂、リード線挿入確認片４５は白色樹脂により形成されており、該リード線挿入確認片４５が上端を確認位置Ｙとした際に、可動押圧片３０との色の対比により視認容易となるようにしている。
【００２６】
一方、傾動変換片４２は、押圧部３４の内側辺３４ｂから下方に垂下する薄肉保持部４７の下端から両側に突出する杆状をなし、該薄肉保持部４７を介して可動押圧片３０と一体的に形成される。そして、傾動変換片４２の両端のうち、開放部３１ｂに突出する受圧端４８は、リード線８０挿入時にリード線挿入端８１と当接するようにその先端を座定位置Ｘ上方に配置され、一方、作動孔４４下部の開口側へ突出する係合端５０は、その先端をリード線挿入確認片４５の切欠部９１に嵌入される。かかる構成にあっては、図１６に示すように、リード線挿入孔３１の座定位置Ｘにリード線８０を挿入すると、リード線挿入端８１の押圧作用により、リード線挿入確認片４５の上端が確認位置Ｙへ突出して端子台１の外方から視認容易となり、該リード線挿入端８１が座定位置Ｘまで挿入されたことを作業者に報知し得るようになっている。
【００２７】
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、基部３３の内側端から突成される正面視Ｖ字形の屈曲防塵片４３ａと、該屈曲防塵片４３ａの屈曲部から下方に突成される舌片状の可撓性防塵片４３ｂとで構成される。前記屈曲防塵片４３ａは、左端部に形成される嵌合部６０を、絶縁性基板２の肉厚頂部７に形成される嵌合溝６１（図２参照）に嵌合し、可動押圧片３０の開放位置Ｉでは、可動押圧片３０と肉厚頂部７との間で折り畳まれ、可動押圧片３０の接続位置IIでは、端子台１の外方へ伸長し、可動押圧片３０の接続位置IIへの変位後に生じる間隙を杆状導通片２０の上方で遮蔽する。一方、可撓性防塵片４３ｂは、屈曲防塵片４３ａの伸縮に伴い傾動して、可動押圧片３０の開放位置Ｉで操作溝８方向に突出し、梃子棒貫通孔３２より挿入された梃子棒８２を該操作溝８へ案内すると共に、可動押圧片３０の接続位置IIで梃子棒貫通孔３２を下方で遮蔽して、該梃子棒貫通孔３２から塵埃が杆状導通片２０上に落下するのを防止する。
【００２８】
次に本発明の要部について説明する。
図９，１５に示すように、可動押圧片３０のＶ形破断刃２２への嵌入部位ｓは、押圧部３４の上縁と基部３３の外側部下縁との間に形成される。この嵌入部位ｓは、リード線挿入孔３１を横断して形成される。すなわち、接続位置IIでＶ形破断刃２２が該嵌入部位ｓに進入し、リード線挿入孔３１を横断するようになっている。そして、該嵌入部位ｓの、リード線挿入孔３１の外側傍位置には、押圧部３４の外側縦辺３４ａ上端と基部３３の外側下部との間を上下に差し渡すようにして誘導薄片４０が形成される。また、該嵌入部位ｓの、リード線挿入孔３１の内側傍位置には、押圧部３４の内側辺３４ｂの上端と基部３３の下部との間を上下に差し渡すようにして支持薄片４１が形成される。この誘導薄片４０と支持薄片４１とは、図１２，１５に示すように、リード線挿入孔３１を内外で挟むようにして、可動押圧片３０の中央に形成されており、リード線挿入孔３１に挿入されるリード線８０の導線８３の太さよりも薄い薄板形状をなす。そして、後述するように、誘導薄片４０及び支持薄片４１は、可動押圧片３０の開放位置ＩではＶ形破断刃２２の内方に退避して、可動押圧片３０の接続位置IIではＶ形破断刃２２にくい込んで、可撓辺部２１ｃの対向端２４，２４間に嵌入するようになっている。
【００２９】
ここで、リード線８０の接続部３，３への結線手順を、図１７，１８に従って説明する。
リード線８０の非接続時には、可動押圧片３０は、開放位置Ｉとなっている（図１７（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に挿入し、リード線８０の挿入端８１が、座定位置Ｘまで達すると、上述したように、傾動変換片４２の傾動により、リード線挿入確認片４５の上端が確認位置Ｙに突出し、外方から容易に視認可能となる（図１７（ロ）参照）。そして、梃子棒貫通孔３２及び梃子棒作動口２３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１８（ハ）参照）。次に、梃子棒８２を操作溝８内の支持側縁９を支点として傾動すると、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杆状導通片２０に沿って移動して接続位置IIとなる（図１８（ニ）参照）。
【００３０】
次に上述の結線手順に伴う、リード線８０の接続態様を図１９に従って説明する。
可動押圧片３０の開放位置Ｉでは、図１９（イ）に示すように、可動押圧片３０の嵌入部位ｓは、Ｖ形破断刃２２の内方に位置しており、杆状導通片２０の対向端２４は相互に接触している。そして、梃子棒８４の押圧作用により、可動押圧片３０が外方へ移動して、嵌入部位ｓの外側に位置する誘導薄片４０をＶ形破断刃２２に押し付けると、傾斜刃先２６の案内作用により可撓辺部２１ｃ，２１ｃを前後に撓ませて、誘導薄片４０は対向端２４，２４間に嵌入する（図１９（ロ）参照）。続いてリード線８０がＶ形破断刃２２を押し付けると、傾斜刃先２６により、該リード線８０が破断され、その導線部分８３が露出すると同時に、傾斜刃先２６の案内作用により可撓辺部２１ｃをさらに撓ませて、リード線８０の破断した部位が対向端２４間に進入することとなる（図１９（ロ））。かかる可動押圧片３０の接続位置IIにあっては、露出した導線部分８３が対向端２４，２４に挟圧されて、リード線８０は、杆状導通片２０と電気的に接続すると共に、リード線挿入孔３１から引抜き不可能に保持されることとなる。
【００３１】
かかる構成にあっては、リード線挿入端８１に先立って、誘導薄片４０が可撓辺部の対向端間に嵌入するから、リード線挿入端８１をＶ形破断刃２２に押圧する際には、常に傾斜刃先２６の間に誘導薄片４０の厚みだけ間隙が生じることとなる。このように、リード線８０の挿入前に傾斜刃先２６間を押し広げておくことにより、リード線を対向端の間に挿入し易くなる。そして、この間隙幅は、誘導薄片４０の厚み分に一定しているから、リード線８０の破断態様はバラつきがなく、安定したものとなる。
【００３２】
以上のように実施例を説明したが、本発明は、上記実施例の構成に限定したものではなく、本発明の趣旨の範囲内で適宜変更可能である。例えば、傾斜刃先２６は、弧状のものでなく直線状に形成したものを用いることもできるし、また、可撓辺部２３ｃ，２３ｃの対向端２４，２４は完全に接触状態でなくとも、誘導薄片４０の厚みより狭い間隙を有するものでもよい。また、誘導薄片４０の横断面は矩形に限定するものではなく、例えばＶ形破断刃２２との当接部分に傾斜面を形成して、対向端２４間に嵌入し易いようにしてもよい。さらに、本発明は、左右に接続部３を一つずつ具備する端子台１に限らず、杆状導通片２０の一側に複数の可動押圧片３０を装着して、一側に接続部３を複数具備した端子台にも同様にして適用できる。
【００３３】
【発明の効果】
本発明は、杆状導通片の両側縁から、上端部を内方へ延出した可撓辺部を対向状に立設して、その対向端をほぼ接触させ、かつ両対向端の内縁に傾斜刃先を夫々形成して、両傾斜刃先によりＶ形破断刃を構成すると共に、可動押圧片のＶ形破断刃への嵌入部位の、リード線挿入孔の外側傍位置に形成され、可動押圧片の接続位置で、傾斜刃先対の間にくい込んで、両対向端の間を所定幅に押し広げる誘導薄片を備えたから（請求項１）、リード線の接続時に、誘導薄片が、リード線に先立って両対向端を押し広げて、傾斜刃先対の間に常に一定幅の間隙を形成することとなり、該リード線を少ない力で対向端間に挿入することができると共に、リード線の破断態様が安定したものとなり、リード線を必要以上に破断することを防止できる。
【００３４】
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、該基部の下部に配設され、リード線挿入孔の下部両側及び下面を形成する正面略Ｕ字状の肉薄な押圧部とを具備すると共に、前記誘導薄片が、押圧部の外側縦辺の上端と、基部との間に上下に差し渡して一体的に連成される場合には（請求項２）、外側縦辺の上端を誘導薄片を介して基部と連結することにより、押圧部を構造的に安定したものとできる。このため、リード線を繰り返し端子台に接続しても、可動押圧片が破損することがない。
【００３５】
そして、可動押圧片のＶ形破断刃への嵌入部位の、リード線挿入孔の内側傍位置に上下に差し渡して形成され、可動押圧片の接続位置で、前記対向端の間に嵌入する支持薄片を備えた場合には（請求項３）、リード線の接続時に、該支持薄片が、Ｖ形破断刃の反対側からリード線を押圧するから、リード線を歪むことなく破断でき、リード線の破断具合をより安定させることができる。また、誘導薄片と同様に、破断刃の嵌入部位に上下に差し渡されるため、可動押圧片を構造的に強固なものとできる。
【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、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】集合した端子台１を据付レール７０に装着した状態を示す平面図である。
【図４】集合した端子台１を据付レール７０に装着した状態を示す側面図である。
【図５】杆状導通片２０を一部切欠して示す、正面図である。
【図６】杆状導通片２０の一辺側の平面図である。
【図７】杆状導通片２０の一辺側の側面図である。
【図８】図６のＡ−Ａ断面図である。
【図９】可動押圧片３０及びリード線挿入確認片４５の正面図である。
【図１０】リード線挿入確認片４５を保持した状態での可動押圧片３０の縦断正面図である。
【図１１】可動押圧片３０の平面図である。
【図１２】図９のＢ−Ｂ断面図である。
【図１３】可動押圧片３０の底面図である。
【図１４】可動押圧片３０の内方側面図である。
【図１５】可動押圧片３０の外方側面図である。
【図１６】リード線８０挿入に伴うリード線挿入確認片４５の変位態様を示す説明図（イ），（ロ），（ハ）である。
【図１７】接続部３，３への結線手順を示す説明図（イ），（ロ）である。ここで杆状導通片２０を縦断して示している。
【図１８】接続部３，３への結線手順を示す説明図（ハ），（ニ）である。ここで杆状導通片２０を縦断して示している。
【図１９】リード線８０の接続過程を示す説明図（イ），（ロ），（ハ）である。ここで誘導薄片４０と支持薄片４１、リード線８０を横断して示している。
【符号の説明】
１端子台
２絶縁性基板
３接続部
４画成壁
２０杆状導通片
２１ｃ可撓辺部
２２Ｖ形破断刃
２４対向端
２６傾斜刃先
３０可動押圧片
３１リード線挿入孔
３３基部
３４押圧部
４０誘導薄片
４１支持薄片
８０リード線
８２梃子棒
Ｉ開放位置
II 接続位置
ｓ嵌入部位[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a terminal block for electrically connecting a plurality of lead wires via a conductive piece.
[0002]
[Prior art]
Various terminal blocks have been proposed in which a hook-shaped conductive piece is mounted transversely on an insulating substrate, and a plurality of connection portions are provided along the hook-shaped conductive piece so that lead wires are electrically connected to the hook-shaped conductive piece. ing. These terminal blocks are overlapped in the front-rear direction and held on the installation rail (see, for example, Patent Document 1).
[0003]
Further, in the above-described terminal block, each connection portion is formed integrally with the bowl-shaped conductive piece and has a V-shaped breaking blade that protrudes along the longitudinal direction of the conductive piece, and a substantially vertical lead wire. A movable pressing piece in which an insertion hole is formed and moves along the bowl-shaped conductive piece, and the lead wire insertion hole is positioned at an open position where the lead wire insertion hole is retracted from the V-shaped breaking blade and a connection position where the V-shaped breaking blade is vertically overlapped Has been proposed by the present inventor and has already filed a patent application (Japanese Patent Application No. 2002-090662).
[0004]
In such a configuration, the flexible side portions with the upper end extending inward from the both side edges of the bowl-shaped conducting piece are erected in an opposing manner, the opposing ends thereof are substantially in contact with each other, and both opposing ends Inclined cutting edges are formed on the inner edge of each of the two, and a V-shaped breaking blade is constituted by the both inclined cutting edges. In addition, the movable pressing piece is disposed below the base to form a lower portion of the lead wire insertion hole and to form a thin base portion that forms the upper portion of the lead wire insertion hole. A thin pressing portion to be inserted is provided, and the insertion portion of the V-shaped breaking blade is formed in a gap shape between the base portion and the pressing portion so as to cross the lead wire insertion hole. When the lead wire is inserted into the lead wire insertion hole of the terminal block while being covered, and the movable pressing piece is moved to the connection position by, for example, tilting operation of the lever rod, the V-shaped breaking blade 22 that has entered the insertion site, and the lead Contact the wire insertion end. Then, the sheath is broken to such an extent that the pair of inclined blades is not easily cut by the lead wire and the lead wire is not cut, and at the same time, the lead wire insertion end pushes the flexible piece portion outwardly by the guide action of the inclined blade tip pair and opposes it. By entering between the ends and pinching the conducting wire between the opposing end edges, the lead wire is electrically connected to the bowl-shaped conducting piece and is held undrawn. Thus, in such a terminal block, it is possible to easily connect the lead wires without requiring a process such as fixing a crimp terminal to the lead wires or exposing the lead wires.
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-224459
[0006]
[Problems to be solved by the invention]
By the way, in the above-mentioned terminal block, when the opposing ends of the flexible side portions of the bowl-shaped conducting piece are in contact with each other, the inclined blade tip pair is closed outward. For this reason, the lead wire is difficult to insert into the inclined blade tip and requires a large force to be inserted between the opposing ends, and the lead wire is unnecessarily broken, and the lead wire is broken due to a tensile force applied at the time of connection. There is a problem that it becomes easy to cut. In order to solve such a problem, a hook-shaped conductive piece is formed so as to have a gap between the opposing ends of the flexible side portion so that the lead wire can be easily fitted between the opposing ends, and only the lead wire is necessary. A terminal block has been proposed that breaks. However, in such a configuration, it is difficult to form the gap width uniformly when molding the bowl-shaped conductive piece, and the difference in the gap width tends to cause unevenness in the degree of breakage of the lead wire for each terminal block. Has occurred.
[0007]
An object of the present invention is to provide a terminal block that can reliably and easily break the coating of the lead wire when the lead wire is connected.
[0008]
[Means for Solving the Problems]
The present invention relates to a terminal block having a plurality of connecting portions along a hook-shaped conductive piece, in which the hook-shaped conductive piece is mounted transversely on an insulating substrate, and a lead wire is electrically connected to the hook-shaped conductive piece. In each of the connecting portions, a V-shaped breaking blade formed integrally with the hook-shaped conductive piece and projecting the blade edge along the longitudinal direction of the conductive piece, and a substantially vertical lead wire insertion hole are formed. A movable pressing piece which moves along the conductive piece and is positioned at an open position where the lead wire insertion hole is retracted from the V-shaped breaking blade and a connecting position which overlaps the V-shaped breaking blade vertically; By moving to the connection position, the lead wire inserted into the lead wire insertion hole is inserted into the V-shaped breaking blade at the connection position so that the lead wire and the hook-like conductive piece are electrically connected. A flexible side part extending inward from the both side edges of the bowl-shaped conducting piece. Standing in a direction, the opposed ends thereof are substantially in contact with each other, and inclined blade edges are formed on the inner edges of both opposed ends to form a V-shaped breaking blade with both inclined blade edges, and the V-shaped movable pressing piece An induction thin piece that is formed on the outer side of the lead wire insertion hole at the part to be inserted into the breaking blade, and is inserted between the pair of inclined blade tips at the connecting position of the movable pressing piece and pushes between the opposing ends to a predetermined width. A terminal block comprising: (Claim 1).
[0009]
Here, the outer side of the movable pressing piece refers to the side facing the V-shaped breaking blade in the open position, and the inner side of the movable pressing piece refers to the opposite side. In this 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 guide thin piece comes into contact with the V-shaped breaking blade before the lead wire, and the inclined blade tip is guided. By the action, both flexible piece parts are spread out on both sides, and enter between the opposing ends of the flexible piece parts. Therefore, when the lead wire comes into contact with the V-shaped breaking blade, a gap corresponding to the thickness of the guiding thin piece is formed between the pair of inclined blade tips. Thus, even if a gap is not formed in advance between the opposing ends of the flexible side portion, when the lead wire is connected, the guide flakes are fitted between the opposing end edges to always form a constant width gap. The lead wire can be inserted between the opposing ends with a small force, and the lead wire can be stably broken with a suitable breaking condition.
[0010]
Here, the movable pressing piece is disposed on the thick base part that forms the upper part of the lead wire insertion hole and the lower part of the base part, and has a substantially U-shaped front surface that forms both the lower side and the lower surface of the lead wire insertion hole. It is good also as a structure which comprises a thin press part, and the said guidance thin piece is integrally connected by extending up and down between the upper end of the outer side vertical side of a press part, and a base (Claim 2). . In such a configuration, the structure of the thin pressing portion becomes more stable by connecting the upper end of the outer vertical side of the pressing portion and the base with the guide thin piece.
[0011]
Further, the supporting thin piece is formed by passing up and down in the position near the inner side of the lead wire insertion hole of the portion where the movable pressing piece is inserted into the V-shaped breaking blade, and is inserted between the opposing ends at the connecting position of the movable pressing piece. It is also proposed to comprise (Claim 3). In such a configuration, when the lead wire is pressed against the V-shaped breaking blade and broken, the inner side portion of the broken portion of the lead wire is supported by the supporting thin piece, so that the lead wire is not easily bent, and the lead The breaking mode of the line will be stable.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
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, by attaching the bowl-shaped conducting piece 20 and the movable pressing pieces 30, 30 on the insulating substrate 2, connecting portions 3, 3 for connecting the lead wires 80 are arranged on both sides of the terminal block 1. Is done. That is, in the terminal block 1, the lead wires 80 and 80 are inserted into the lead wire insertion holes 31 of the movable pressing pieces 30 and 30, respectively, and connected to the left and right side portions of the hook-like conductive piece 20, thereby The left and right lead wires 80 are electrically connected via the conductive piece 20. Below, each part of this terminal block 1 is demonstrated in detail.
[0013]
As shown in FIG. 2, the insulating substrate 2 projects the seating groove surfaces 5, 5, etc. in an open state 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 has a square shape inclined at an equal angle from the thick triangular top portion 7 to both sides, and the inside of the inclined side is substantially rectangular along the inclined side by the defining wall 4. The seating groove surfaces 5 and 5 are divided into shapes, and further, the connection ports 6 and 6 open upward on the seating groove surfaces 5 and 5. Further, at the bottom of the seating groove surfaces 5 and 5, there is an upper portion that supports the tip end portion of a lever rod 82 (see FIGS. 17 and 18) inserted when the movable pressing piece 30 is displaced so as to be tiltable by the support side edge 9. An operation groove 8 that opens to the right is defined by the defining wall 4.
[0014]
Further, a connection hole 55 is formed at an appropriate position on the front surface of the defining wall 4 formed around the insulating substrate 2, and the connection protrusion (see FIG. The terminal blocks 1 are connected to each other in a superposed manner. 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 terminal block row on the installation rail 70, fixing brackets 76 are fixed to the installation rail 70 with screws 77.
[0015]
The bowl-shaped conducting piece 20 is made of a copper alloy or the like, and is attached to the seating groove surfaces 5 and 5 of the insulating substrate 2 and attached to the back plate 10 of the insulating substrate 2 as shown in FIG. It has a bowl shape that is bent into a letter shape. As shown in FIGS. 5 to 8, the bowl-shaped conductive piece 20 is located on each side portion attached to each seating groove surface 5, 5, and includes a bottom surface portion 21 a and both sides of the bottom surface portion 21 a. It has a U-shaped cross-section composed of standing side portions 21b and 21b. Then, on the bottom surface portion 21a, a portion facing the opening of the operation groove 8 is cut out to form lever rod operating ports 23,23. Engagement protrusions 25 and 25 that engage with the movable pressing piece 30 are formed inwardly on the side surfaces 21b and 21b, and further on the side edges of the side surfaces 21b and 21b, flexible side portions 21c and 21b are formed. 21c is erected.
[0016]
The flexible side portions 21c and 21c have their upper end portions bent inwardly in FIG. 7, and the opposite ends 24 and 24 are in contact with each other at an intermediate position. As shown in FIGS. 5 and 6, inclined blade edges 26 and 26 are formed to be inclined in an arc shape downward from both inner edges of the opposed ends 24 and 24, respectively. The pair forms a V-shaped breaking blade 22 that breaks the lead wire 80. Then, as will be described later, in the flexible side portions 21c and 21c, when the lead wire 80 is pressed against the V-shaped breaking blade 22 from the inside, the flexible side portion 21c is guided by the guide action of the inclined blade edges 26 and 26. , 21c bends outward in FIG. 7 to create a gap between the opposed ends 24, 24 so that the lead wire 80 fitted in the gap is clamped and held between the opposed ends 24, 24. Yes.
[0017]
As shown in FIG. 1, the movable pressing piece 30 is located at the left and right connecting portions 3 and 3, and is movable along the saddle-like conducting piece 20 between the side portions 21 b and 21 b of the saddle-like conducting piece 20. It is attached to. The movable pressing piece 30 is made of an insulating synthetic resin material such as nylon formed symmetrically on the front and back sides, and as shown in FIGS. 9 and 10, a lead wire insertion hole 31 is formed on the outer side (right side in FIGS. 9 and 10). On the inner side (left side in FIGS. 9 and 10), a lever rod through hole 32 is formed in the vertical direction. In addition, an operation hole 44 is formed in the vertical direction between the lead wire insertion hole 31 and the insulator rod through hole 32, and a lead wire insertion confirmation piece 45 described later can be moved up and down in the operation hole 44. Retained.
[0018]
Further details will be described with reference to FIGS. In the following description, the inner side of the movable pressing piece 30 refers to the left 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 on the outer lower portion of the base portion 33 and having a substantially U-shape on the front side. The pressing portion 34 is mounted so as to be fitted into the bowl-shaped conducting piece 20, and at the connection position II of the movable pressing piece 30, the side portions 21 b and 21 b of the bowl-shaped conducting piece 20 and the flexible side portions 21 c and 21 c are connected. In addition, the entire pressing portion 34 is fitted. That is, between the upper edge of the pressing portion 34 and the lower edge of the outer portion of the base portion 33, the V-shaped breaking blade 22 is inserted and enters at the connection position II, and the insertion site s according to the present invention is formed at this position. Is done.
[0019]
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 surely positioned at the open position I and the connection position II.
[0020]
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 hook-shaped conductive piece 20. 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 moves between the inner open position I and the outer connection position II (see FIGS. 17 and 18).
[0021]
Further, the lead wire insertion hole 31 formed in the outer portion of the movable pressing piece 30 communicates with a through portion 31a vertically passing through the outer portion of the base portion 33 and a lower end of the through portion 31a, and within the pressing portion 34. The open portion 31b is opened to the front and rear, and the lower portion of the open portion 31b is a seating position X of the lead wire insertion end 81.
[0022]
A tongue-like lead wire holding piece 46 projects toward the seating position X on the outer vertical side 34a of the pressing portion 34 that forms the outer surface of the opening 31b. The lead wire holding piece 46 elastically contacts the lead wire insertion end 81 when the lead wire 80 is inserted, and presses the lead wire insertion end 81 against the inner side surface of the open portion 31b, so that the lead wire insertion end 81 is seated. It is configured to stop at a fixed position X (see FIG. 16).
[0023]
Protrusions 36 are formed on the front and rear surfaces of the bottom side of the pressing portion 34. The protrusions 36, 36 are engaged with the engaging protrusion 25 formed on the bowl-shaped conducting piece 20 at the opening position I and the connecting position II of the movable pressing piece 30, respectively, and the moderation means for holding the movable pressing piece 30. Configure.
[0024]
Next, the lead wire insertion confirmation piece 45 and confirmation piece displacement means for displacing the lead wire insertion confirmation piece 45 will be described with reference to FIGS. The confirmation piece displacing means includes an operation hole 44 that holds the lead wire insertion confirmation piece 45 so as to be movable up and down, and a tilt conversion piece 42 that raises the lead wire insertion confirmation piece 45 by the pressing action of the lead wire insertion end 81.
[0025]
As shown in FIGS. 9 and 10, the lead wire insertion confirmation piece 45 has a vertically long bowl shape with a notch 91 formed in the lower portion, and is held up and down in the operation hole 44 of the movable pressing piece 30. . The operation hole 44 is formed vertically in the central portion of the movable pressing piece 30, and its cross section has a shape free of play with respect to the lead wire insertion confirmation piece to be inserted. The upper end of the operating hole 44 opens to the upper surface of the projecting portion 38, and the upper position is set as a confirmation position Y of the upper end of the lead wire insertion confirmation piece 45. On the other hand, the lower end of the operating hole 44 opens to the inner side 34 b of the pressing portion 34, and the notch portion 91 of the lead wire insertion confirmation piece 45 to be held is exposed to the open portion 31 b of the lead wire insertion hole 31. The movable pressing piece 30 is made of red resin, and the lead wire insertion confirmation piece 45 is made of white resin. When the upper end of the lead wire insertion confirmation piece 45 is set to the confirmation position Y, the color with the movable pressing piece 30 is This makes it easy to visually recognize.
[0026]
On the other hand, the tilt conversion piece 42 has a hook-like shape projecting to both sides from the lower end of the thin holding part 47 that hangs downward from the inner side 34 b of the pressing part 34, and is integrated with the movable pressing piece 30 via the thin holding part 47. Formed. Of the two ends of the tilt conversion piece 42, the pressure receiving end 48 protruding to the open portion 31b is disposed with its tip above the seating position X so as to come into contact with the lead wire insertion end 81 when the lead wire 80 is inserted. The engagement end 50 protruding toward the opening side below the operation hole 44 is fitted into the notch 91 of the lead wire insertion confirmation piece 45 at the tip. In this configuration, as shown in FIG. 16, when the lead wire 80 is inserted into the seating position X of the lead wire insertion hole 31, the upper end of the lead wire insertion confirmation piece 45 is pressed by the lead wire insertion end 81. Protrudes to the confirmation position Y and is easily visible from the outside of the terminal block 1 so that the operator can be notified that the lead wire insertion end 81 has been inserted to the seating position X.
[0027]
Further, a dustproof valve 43 is integrally formed at the inner end of the base portion 33. The dustproof valve 43 includes a V-shaped bent dustproof piece 43a protruding from the inner end of the base 33 and a tongue-like flexible dustproof protrusion protruding downward from the bent portion of the bent dustproof piece 43a. It consists of a piece 43b. The bent dust-proof piece 43a fits the fitting portion 60 formed at the left end portion into the fitting groove 61 (see FIG. 2) formed in the thick top portion 7 of the insulating substrate 2, and the movable pressing piece 30. At the open position I, the movable pressing piece 30 is folded between the thick top portion 7 and at the connection position II of the movable pressing piece 30, it extends outward from the terminal block 1 and the connecting position II of the movable pressing piece 30 is reached. The gap that occurs after the displacement to is shielded above the bowl-shaped conductive piece 20. On the other hand, the flexible dustproof piece 43b tilts as the bent dustproof piece 43a expands and contracts, protrudes in the direction of the operation groove 8 at the opening position I of the movable pressing piece 30, and is inserted through the lever rod through hole 32. To the operation groove 8 and at the connection position II of the movable pressing piece 30, the insulator rod through hole 32 is shielded downward, and dust falls from the insulator rod through hole 32 onto the bowl-shaped conducting piece 20. To prevent.
[0028]
Next, the main part of the present invention will be described.
As shown in FIGS. 9 and 15, the insertion portion s of the movable pressing piece 30 into the V-shaped breaking blade 22 is formed between the upper edge of the pressing portion 34 and the lower outer edge of the base portion 33. This insertion site s is formed across the lead wire insertion hole 31. That is, the V-shaped breaking blade 22 enters the fitting site s at the connection position II and crosses the lead wire insertion hole 31. Then, at the position near the outside of the lead wire insertion hole 31 of the insertion site s, the guide thin piece 40 is provided so as to pass up and down between the upper end of the outer vertical side 34a of the pressing portion 34 and the outer lower portion of the base portion 33. It is formed. Further, a support thin piece 41 is formed at a position near the inner side of the lead wire insertion hole 31 of the insertion portion s so as to pass up and down between the upper end of the inner side 34b of the pressing portion 34 and the lower portion of the base portion 33. Is done. As shown in FIGS. 12 and 15, the guide thin piece 40 and the support thin piece 41 are formed at the center of the movable pressing piece 30 so as to sandwich the lead wire insertion hole 31 inside and outside, and are inserted into the lead wire insertion hole 31. The lead wire 80 has a thin plate shape thinner than the thickness of the conductive wire 83. Then, as will be described later, the guiding thin piece 40 and the supporting thin piece 41 are retracted inward of the V-shaped breaking blade 22 at the opening position I of the movable pressing piece 30 and V-shaped breaking at the connecting position II of the movable pressing piece 30. The blade 22 is inserted so as to fit between the opposed ends 24, 24 of the flexible side portion 21c.
[0029]
Here, the procedure for connecting the lead wire 80 to the connecting portions 3 and 3 will be described with reference to FIGS.
When the lead wire 80 is not connected, the movable pressing piece 30 is in the open position I (see FIG. 17A). In this state, when the lead wire 80 is inserted into the lead wire insertion hole 31 from the connection ports 6 and 6, and the insertion end 81 of the lead wire 80 reaches the seating position X, as described above, the tilt conversion piece 42 is inserted. The upper end of the lead wire insertion confirmation piece 45 protrudes to the confirmation position Y and can be easily visually recognized from the outside (see FIG. 17B). Then, the lever rod 82 is inserted from the lever rod through-hole 32 and the lever rod operating port 23, and its tip abuts against the bottom edge of the operation groove 8 (see FIG. 18C). Next, when the lever rod 82 is tilted with the support side edge 9 in the operation groove 8 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 dynamic moment, the movable pressing piece 30 moves along the rod-shaped conducting piece 20 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 (FIG. 18). (See D).
[0030]
Next, the connection mode of the lead wires 80 according to the above-described connection procedure will be described with reference to FIG.
In the open position I of the movable pressing piece 30, as shown in FIG. 19A, the insertion site s of the movable pressing piece 30 is located inward of the V-shaped breaking blade 22, and Opposing ends 24 are in contact with each other. When the movable pressing piece 30 is moved outward by the pressing action of the lever rod 84 and the guiding thin piece 40 positioned outside the insertion site s is pressed against the V-shaped breaking blade 22, the guiding action of the inclined cutting edge 26 is performed. The flexible side portions 21c and 21c are bent back and forth, and the guiding thin piece 40 is fitted between the opposed ends 24 and 24 (see FIG. 19B). Subsequently, when the lead wire 80 presses the V-shaped breaking blade 22, the lead wire 80 is broken by the inclined blade edge 26, and the conductive wire portion 83 is exposed. At the same time, the flexible side portion 21 c is moved by the guiding action of the inclined blade edge 26. Further bent, the broken portion of the lead wire 80 enters between the opposing ends 24 (FIG. 19B). At the connection position II of the movable pressing piece 30, the exposed conductor portion 83 is sandwiched between the opposed ends 24, 24, and the lead wire 80 is electrically connected to the bowl-shaped conduction piece 20 and leads The wire insertion hole 31 is held so that it cannot be pulled out.
[0031]
In this configuration, prior to the lead wire insertion end 81, the guide thin piece 40 is fitted between the opposing ends of the flexible side portions, and therefore when the lead wire insertion end 81 is pressed against the V-shaped breaking blade 22. A gap is always generated between the inclined cutting edges 26 by the thickness of the guiding thin piece 40. In this way, by pushing and spreading between the inclined blade edges 26 before inserting the lead wire 80, the lead wire can be easily inserted between the opposed ends. Since the gap width is constant for the thickness of the induction thin piece 40, the breakage of the lead wire 80 does not vary and is stable.
[0032]
Although the embodiments have been described above, the present invention is not limited to the configurations of the above embodiments, and can be appropriately changed within the scope of the gist of the present invention. For example, the inclined blade edge 26 may be formed in a straight line instead of an arcuate shape, and the opposing ends 24 and 24 of the flexible side portions 23c and 23c may be guided even if they are not completely in contact with each other. It may have a gap narrower than the thickness of the flake 40. In addition, the cross section of the guide thin piece 40 is not limited to a rectangle, and for example, an inclined surface may be formed at a contact portion with the V-shaped breaking blade 22 so as to be easily fitted between the opposed ends 24. Furthermore, the present invention is not limited to the terminal block 1 having one connection part 3 on each of the left and right sides, but a plurality of movable pressing pieces 30 are attached to one side of the bowl-shaped conduction piece 20 and the connection part 3 is provided on one side. It can be similarly applied to a terminal block provided with a plurality of terminals.
[0033]
【The invention's effect】
According to the present invention, the flexible side portions having the upper ends extending inward from the both side edges of the bowl-shaped conducting piece are erected in an opposing manner so that the opposing ends are substantially in contact with each other and the inner edges of both opposing ends are Each of the inclined cutting edges is formed to form a V-shaped breaking blade by both inclined cutting edges, and the movable pressing piece is formed at a position near the outside of the lead wire insertion hole in the portion where the movable pressing piece is inserted into the V-shaped breaking blade. In the connecting position, the guide flakes are provided so that they are inserted between the inclined blade tip pairs and pushed between the opposing ends to a predetermined width (Claim 1). Therefore, when the lead wires are connected, the guide flakes precede the lead wires. Thus, both opposing ends are widened to always form a gap having a constant width between the pair of inclined blades, and the lead wire can be inserted between the opposing ends with a small force. It becomes stable and can prevent the lead wire from being broken more than necessary.
[0034]
The movable pressing piece is disposed on the thick base portion that forms the upper portion of the lead wire insertion hole and the lower portion of the base portion, and the front substantially U-shaped thin press that forms both the lower side and the lower surface of the lead wire insertion hole. And when the guide thin piece is integrally connected between the upper end of the outer vertical side of the pressing portion and the base and is integrally coupled (Claim 2), the outer vertical side The pressing portion can be structurally stable by connecting the upper end of the pressing portion to the base portion via the induction thin piece. For this reason, even if the lead wire is repeatedly connected to the terminal block, the movable pressing piece is not damaged.
[0035]
And the supporting thin piece which is formed by passing up and down on the inner side position of the lead wire insertion hole of the insertion portion of the movable pressing piece to the V-shaped breaking blade and is inserted between the opposing ends at the connecting position of the movable pressing piece. (Claim 3), when the lead wire is connected, since the supporting thin piece presses the lead wire from the opposite side of the V-shaped breaking blade, the lead wire can be broken without being distorted. The breaking condition can be made more stable. Further, similarly to the induction thin piece, the movable pressing piece can be made structurally strong because it is passed up and down to the insertion site of the breaking blade.
[Brief description of the drawings]
FIG. 1 is a front view showing a terminal block 1 of the present invention. 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.
FIG. 3 is a plan view showing a state in which the assembled terminal block 1 is mounted on the installation rail 70. FIG.
4 is a side view showing a state in which the assembled terminal block 1 is mounted on the installation rail 70. FIG.
FIG. 5 is a front view showing the bowl-shaped conducting piece 20 with a part cut away.
6 is a plan view of one side of the bowl-shaped conducting piece 20. FIG.
7 is a side view of one side of the bowl-shaped conductive piece 20. FIG.
8 is a cross-sectional view taken along the line AA in FIG.
9 is a front view of the movable pressing piece 30 and the lead wire insertion confirmation piece 45. FIG.
10 is a longitudinal sectional front view of the movable pressing piece 30 in a state where the lead wire insertion confirmation piece 45 is held. FIG.
11 is a plan view of the movable pressing piece 30. FIG.
12 is a cross-sectional view taken along the line BB in FIG.
13 is a bottom view of the movable pressing piece 30. FIG.
14 is an inner side view of the movable pressing piece 30. FIG.
15 is an outer side view of the movable pressing piece 30. FIG.
FIGS. 16A and 16B are explanatory views (a), (b), and (c) showing a displacement mode of the lead wire insertion confirmation piece 45 when the lead wire 80 is inserted. FIGS.
FIGS. 17A and 17B are explanatory views (a) and (b) showing a connection procedure to the connection units 3 and 3; FIGS. Here, the bowl-shaped conductive piece 20 is shown in a longitudinal section.
FIGS. 18A and 18B are explanatory views (c) and (d) showing a connection procedure to the connection units 3 and 3; FIGS. Here, the bowl-shaped conductive piece 20 is shown in a longitudinal section.
19 is an explanatory diagram (a), (b), (c) showing a connection process of the lead wire 80. FIG. Here, the guiding thin piece 40, the supporting thin piece 41, and the lead wire 80 are shown crossed.
[Explanation of symbols]
1 Terminal block
2 Insulating substrate
3 connections
4 painting walls
20 bowl-shaped conducting piece
21c Flexible side
22 V-shaped breaking blade
24 Opposite end
26 Inclined cutting edge
30 Movable pressing piece
31 Lead wire insertion hole
33 Base
34 Pressing part
40 induction flakes
41 Support flake
80 lead wire
82
I Open position
II Connection position
s Insertion site

Claims

In the terminal block comprising a plurality of connecting portions along the hook-shaped conductive piece, the hook-shaped conductive piece is mounted transversely on the insulating substrate, and the lead wire is electrically connected to the hook-shaped conductive piece.
Each connection is
A V-shaped breaking blade that is integrally formed with the bowl-shaped conducting piece and projects the blade edge along the longitudinal direction of the conducting piece;
An approximately vertical lead wire insertion hole is formed, which moves along the bowl-shaped conducting piece to an open position where the lead wire insertion hole is retracted from the V-shaped breaking blade and a connection position where the V-shaped breaking blade overlaps vertically. A movable pressing piece to be positioned,
By moving the movable pressing piece to the connection position, the lead wire inserted into the lead wire insertion hole is inserted into the V-shaped breaking blade at the connection position, and the lead wire and the hook-like conduction piece are electrically connected. In what you do
From the both side edges of the bowl-shaped conducting piece, the flexible side parts extending from the upper end to the inside are erected in an opposing manner so that the opposed ends are substantially in contact with each other, and the inclined blade edge is formed on the inner edges of both opposed ends, respectively. Forming and forming a V-shaped breaking blade with both inclined cutting edges,
It is formed at the position near the outside of the lead wire insertion hole at the part where the movable pressing piece is inserted into the V-shaped breaking blade. A terminal block comprising induction flakes that extend to the width.

The movable pressing piece has a thick base that forms the upper part of the lead wire insertion hole,
A thin U-shaped pressing portion that is disposed in the lower part of the base and forms the lower side and the lower surface of the lead wire insertion hole;
The terminal block according to claim 1, wherein the guide flakes are integrally connected by passing up and down between an upper end of an outer vertical side of the pressing portion and a base portion.

The movable pressing piece is provided with a support thin piece that is formed so as to be vertically inserted at a position adjacent to the inner side of the lead wire insertion hole of the insertion portion of the movable pressing piece into the V-shaped breaking blade. The terminal block according to claim 1 or claim 2.