JP3710147B2

JP3710147B2 - Terminal structure

Info

Publication number: JP3710147B2
Application number: JP06432794A
Authority: JP
Inventors: 弘伸中野
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-02-22
Filing date: 1994-02-22
Publication date: 2005-10-26
Anticipated expiration: 2020-10-26
Also published as: JPH07235253A

Description

【０００１】
【産業上の利用分野】
本発明は端子の接続部の構造に関し、詳しくは電線接続の長期安定的な信頼性を高めるとともに、簡単且つ迅速に接続作業が出来る端子部に関する。
【０００２】
【従来の技術】
従来この種の端子部における構造は、圧着端子、電線をネジで直接締め付けるもの、パイプ端子にネジを設けて電線を直接締め付けるもの、電線上部を蓋う部材等と共にネジで締め付けるもの等がある。
【０００３】
【発明が解決しようとする課題】
従来の圧着端子は、作業現場に圧着器具を持込み操作することが難儀であるため正確に圧着できない場合があり、ネジで電線を直接締め付けるもの又は蓋う部材と共にネジで締め付けるもの等は、使用後一定期間経過するとネジが物理的に必ず緩み締め直さなければ接続不良を生じる恐れがあり信頼が持てなかった。
【０００４】
そこで、電線の締め付け作業が簡単且つ締め付け度合いに多少の強弱があっても確実に電線が接続され、更に、押ネジに緩みが生じても電線押圧力が緩まず恒久的に安定した導電が得られ信頼性の高い端子の開発が切望されていた。
【０００５】
【課題を解決するための手段】
本願発明の端子部の構造は、中空筒状のケースと、
挿入される電線の外形に対応させて電線が少し余裕をもって挿入できる程度の大きさの内径に形成した円形孔を備える筒状の筒端子であって、周壁には外部から押圧バネの一部を円形孔内に挿入された電線に向けて差し込む為の切開部が形成してある筒端子と、
断面をＷ字状に形成してそれの両端をケースに装着する為の支持部とし、Ｗ字状の中央部に位置する凸部を押ネジに対接させる加圧部とし、かつＷ字状の中央部に位置する加圧部の両側における二つの凹状部を電線を押さえ付ける為の押圧部としている押圧バネと、
中空筒状のケースの周壁に対して回動自在に装着して押圧バネにおけるＷ字状の中央部に位置する加圧部を押圧する為の押ネジとを備え、
上記中空筒状ケース内には、上記筒端子を、切開部が中空筒状ケース内壁と空間を隔てた状態で押ネジの存在する方向に向き、かつ、筒端子の軸心が中空筒状ケースの軸芯と平行する状態で中空筒状ケース内壁に接して存置させ、
上記押圧バネは、中空筒状ケース内における中空筒状ケース内壁と上記筒端子との間隙に、二つの支持部と二つの押圧部と加圧部とが筒端子の軸心方向に並び、二つの支持部の一方は上記中空筒状ケースの電線挿入側に、他方は奥部側に夫々取り付けられ、二つの押圧部は夫々挿入される電線の前後の外周を切開部を通しての押し圧を可能に位置させ、
加圧部は、中空筒状ケースの周壁に対して回動自在に装着してある押ネジによっての押圧を可能に押ネジの先端に対向させた位置になるよう配設し、
中空筒状ケースの周壁に対して回動自在に装着してある押ネジの回動によって、上記二つの押圧部が、上記筒端子に挿入される電線の前後の外周を押し圧し、電線の外周面を、電線が少し余裕をもって挿入できる程度の大きさに形成してある内径の上記筒端子における円形孔内壁の円弧面に当接させることができるようにしてある。
【０００６】
押圧バネの前後端をケースで支え、前後端との間の複数の押圧部が筒端子の切開部の口開部から押し圧可能にし、電線を挿入後、押ネジ等を締め付けると押圧部に電線が押圧され筒端子の円形孔の壁面に支えられて崩れず接続を保つ。
【０００７】
特に図示されている撚線を接続する場合においては、筒端子を用い押圧部が位置する部分に複数の切開部を設け、電線を挿入後押ネジ等を締め付けると押圧部が直接電線を押圧し、より線は円形孔の内壁に支えられ全体が緩むことなく接続が安定する。
【０００８】
更に、筒端子の円形孔の奥部をテーパーに形成し、そのテーパー孔部分に挿入した撚り線端末は、全体が円形孔の内壁に押し付けられ、特に撚線の崩れを防止する。
【０００９】
本願発明は、より線に限らず単線に用いても何ら支障無く使用でき、電線が固定するなどの効果が得られる。
【００１０】
【作用】
押ネジ等を締め付けると押圧部が電線と端子を締め付け、一定期間使用後の押ネジ等及び電線の緩みを押圧バネの弾力性の蓄積で補強し、堅固な押ネジ等が押圧バネの緩みを補強する。
【００１１】
切開部を設けた筒端子を用いると、電線がその内壁全体に支えられるとともに、押圧部が直接電線を押圧できる。
【００１２】
奥部に向けて緩やかに細くテーパー孔を形成した筒端子を使用すると、電線の外径に差があってもテーパー部分で自動的に合致する位置が定まり、挿入した電線端末がテーパー内壁に押し付けられ、電線全体の緩み崩れを防止する。
【００１３】
【実施例】
以下本願の実施例を示す図面について説明すると、１は筒端子であり、電線７を挿入し支える円形孔２を形成しその奥部はテーパー孔３を形成し電線７の端末が押し付けられ、円形孔２と共に電線７全体を崩さず原形を保つ。
円形孔２の内径は、図１及び図３に示されるように、電線７が少し余裕をもって挿入できる程度に電線７の外径に対応する大きさに形成し、押圧部６、６で挿入された電線７を押圧した状態では図３に示されるように、電線７の両側が円形孔２の内壁に当接するような内径に形成してある。円形孔２は口開部１２から奥底の少し前まで平行孔に形成してある。また円形孔２の内径は全長を緩やかなテーパー孔にしてもよい。テーパー孔３は図５に示すように奥部の一部に限りテーパーにし、電線７の外径に差があつても挿入時にテーパー孔３の部分で調節され端末部分がその内壁全周に押し付けられ固定するため安定的に接続を保つ。４・４は切開部であり、筒端子１の上部に複数設け押圧部６・６が触れることなく入る大きさに口開しておく。５はケースであり、一方に口開部を形成し、前後の側部に細長い横孔を設けている。この横孔には、図１に示されているように断面をＷ字状に形成してある押圧バネ８の両端の支持部９・９を取付ける。押圧部６・６は押圧バネ８の両端中間に複数設け、図１に表れているように切開部４・４の位置にある電線７の上部に定着させる。断面がＷ字状の押圧バネ８における中央部に位置する凸部の加圧部に図示のように押ネジ１１を対接させ、押ネジ１１をネジ込むと断面がＷ字状の押圧バネ８における凸部の加圧部の両側に位置する凹状の押圧部６、６は図１、図３に現れているように電線７を直接押圧する。電線７はより線に限らず単線でも使用できる。押圧バネ８は押ネジ１１で強固に押圧定着すると共に弾力性を蓄積し、押ネジ１１の物理的緩み及び電線７の通電による緩みを補強する。１０はバネ先端であり、ケース５の前部に設けた押圧ネジ１１で締め付けると押圧部６・６が作動し電線７を同時に押圧する。押ネジ１１は押圧バネ８を強固に押圧し定着させる。口開部１２は筒端子１に電線７の先端が容易に入るよう少し余裕のある内径にする。１３は連結部であり、それぞれの端子が電線７から導電した電気を次ぎに送電する接続部である。１４は滑り止めであり、円形孔２に線を多数形成し電線７の滑り止めを成す。
【００１４】
図１においては、押圧バネ８を用いて筒端子１内の電線７の接続状態を示す一部の側断面図であり、図５に示す筒端子１をケース５に装着し、その奥まで電線７を差し込み奥のテーパー孔３に端末を押し付け固定し、ケース５の前後に設けた横孔に押圧バネ８の両端を取付けて支え、Ｖ字形の押圧部６・６が筒端子１の上部に設けた切開部４・４の入口に位置させ、押圧バネ８の中央上部に押ネジ１１をケース５に取付けておき、これをネジ込むと押圧バネ８が下降し押圧部６・６が電線７を均一的に押圧し筒端子１に接続する。押し圧される電線７は円形孔２の全壁及びテーパー孔３に支えられ縒りが崩れず接続が安定する。接続後一定期間を経過すると物理的に押ネジ１１は緩みを生ずるが、押圧バネ８が蓄積している弾力性が作用し、その緩みを補強し電線７に対する押圧力が弱小すること無く、従って一定期間使用後の点検及び押ネジ１１の締め直し無用となり手間が省けるばかりか、締め直しを怠った場合の危険性が解消する。
【００１５】
図２においては、図１と同じく筒端子の一部側断面図であり、図１とは異なり、底部に向けて細く緩やかなテーパー形状の円形孔２を形成した筒端子１の実施例を示すものである。ケース５に装着した筒端子１は、例えば後部に押圧バネ８の後端９を取り付けて支え、押圧バネ８の先端上部に押ネジ１１を取付け、切開部４・４の入口に押圧部６・６を位置させておき、電線７を口開部１２から差し込むと奥のテーパー孔３に先端が挿入して図示のように内壁に囲まれ、それにより強く締め付けられ、次ぎに押ネジ１１をネジ込むとバネ先端１０が押し圧され押圧部６・６が電線７を押圧し円形孔２の壁面により線部分が支えられて崩れず押圧力が安定する。押圧部６・６においては弾力性を有しており、使用後一定期間が経過した押ネジ１１及び電線７の緩みを補強するに足る剛性な弾力性が作用し電線７に対する押圧力が緩むことなく安定した導電効果を保ち、押ネジ１１の締め直し無用であり保安上点検の手間が省けるなど信頼性が著しく向上する。
【００１６】
図３においては、図１のＡ−Ａ断面図であり、押ネジ１１で押圧バネ８の中央部頂点を経て押圧部６・６に圧縮された電線７が筒端子１の円形孔２の壁面に支えらて崩れず固定した完全な接続導電状態を示している。
【００１７】
図４においては、筒端子１の斜視図であり、テーパー孔３、切開部４・４の状態を示しており、外形は円形に限らず、必要に応じ任意の形状でよく、漏電遮断器の構造等の条件に適した形状にすれば効果的である。
【００１８】
図５においては、筒端子１の側断面図であり、テーパー孔３の内壁状態と、平行な円形孔２及び切開部４・４の溝の深さを示している。更に、筒端子１の円形孔２の形状は、口開部１２から奥底部に至る全長を同径による平行孔であっても、切開部４・４を設けて押圧部６・６を形成する押圧バネ８との組み合わせ構造にすれば、本願の効果は充分得られる。更に、円形孔２の下部壁面に滑り止め１４の線を多数を並列に設けておけば電線７の抜け止めとなる。
【００１９】
作業条件の悪い場所で使用する場合においても、本願による漏電遮断器の各端子部は、押ネジ１１で剛性な押圧バネ８を押し圧しても弾力性が作用して非常に軽く締まり、しかも１本の押ネジ１１をネジ込むだけで複数の押圧部を一挙に押圧作動し、作業が簡単容易であり省力化の効果も得られる。
【００２０】
なお、本願の押圧バネ８を用いる端子部については、本願の筒端子１の使用に限定されること無く、従来使用されている総ての端子部に応用可能であり、その場合においても何ら劣ることなく本願による効果が得られる特徴をも兼ね備えている。
【００２１】
【発明の効果】
以上のように本願発明にあっては、押圧バネ８の特徴である弾力性と、押ネジ１１の持つ堅固性とを組み合わせた構造にしたことにより、押圧バネ８だけでは緩みを生ずる欠点を押ネジの持つ強固性で補強し、押ネジ１１が物理的に緩む欠点及び通電による電線の緩みを押圧バネ８の持つ弾力性の蓄積分で補強する構造にしたことにより強力且つ剛性な押圧力を均一的に持続し、長期に安定した接続導電による信頼性を飛躍的に向上させた。
【００２２】
筒端子１の円形孔２及びテーパー孔３に電線７を挿入して支え、切開部４から押圧部６、６が直接電線７を押圧するようにして安定した接続を可能にした。
特に、筒状の筒端子１は、挿入される電線７の外形に対応させて電線が少し余裕をもって挿入できる程度の大きさの内径に形成した円形孔を備えるので、押圧部６，６で押圧した状態では、図３に現れるように電線の両側は円形孔の内壁における円弧面で囲んで、そこの型崩れを保護する特長がある。
【００２３】
押ネジ１１をネジ込む場合、押圧バネ８の弾力性が働き軽く締まり、更に１本の押圧バネ１１を締めれば複数の押圧部６、６が押圧作用するなど、作業条件の悪い場所においても簡単正確な接続作業が容易にできる特長をも有する。
繰り返すと、押圧バネ８は、二つの支持部９，９の一方は上記中空筒状ケース５の電線挿入側に、他方は奥部側に夫々取り付け、二つの押圧部６，６は夫々挿入される電線７の前後の外周を切開部４，４を通しての押し圧を可能に位置させ、加圧部は、中空筒状ケースの周壁に対して回動自在に装着してある押ネジ１１によっての押圧を可能に押ネジの先端に対向させた位置になるよう配設するものであるから、前述したように１本の押圧バネ１１を締めれば複数の押圧部６・６が同時に押圧でき、電線７を複数カ所で、堅固に、しかも迅速に締め付けできる効果がある。
【００２４】
【図面の簡単な説明】
【図１】支持部９で両端を支え、押圧バネ８の中央部を押ネジ１１で押圧し、電線７が筒端子１に押し付けた状態を示す一部側断面図。
【図２】底部に向けて細く緩やかなテーパー形状の円形孔２を形成した例を示し、電線７を挿入した状態を示す一部側断面図。
【図３】切開部４・４から押圧部６・６で電線７を押圧した状態を示すＡ−Ａ断面図。
【図４】筒端子１の斜視図。
【図５】筒端子１の側断面図。
【符号の説明】
１筒端子
２円形孔
３テーパー孔
４切開部
５ケース
６押圧部
７電線
８押圧バネ
９支持部
１０バネ先端
１１押ネジ
１２口開部
１３連結部
１４滑り止め[0001]
[Industrial application fields]
The present invention relates to a structure of a terminal connecting portion, and more particularly to a terminal portion that can improve the long-term stable reliability of electric wire connection and can be easily and quickly connected.
[0002]
[Prior art]
Conventionally, this type of terminal portion includes a crimp terminal, a wire that is directly tightened with a screw, a screw that is provided on a pipe terminal to directly tighten the wire, and a screw that is tightened together with a member that covers the upper portion of the wire.
[0003]
[Problems to be solved by the invention]
Conventional crimp terminals cannot be accurately crimped because it is difficult to bring a crimping instrument into the work site, and it may not be possible to crimp accurately. When a certain period of time has passed, the screws may not be physically loosened and tightened, resulting in poor connection and unreliability.
[0004]
Therefore, even if the tightening operation of the wire is simple and the tightening degree is somewhat strong, the wire is securely connected, and even if the push screw is loosened, the wire pressing force does not loosen and a permanent and stable conductivity is obtained. The development of highly reliable terminals was eagerly desired.
[0005]
[Means for Solving the Problems]
The structure of the terminal portion of the present invention is a hollow cylindrical case,
A cylindrical tube terminal having a circular hole formed in the inner diameter of a size that allows the wire to be inserted with a slight margin corresponding to the outer shape of the inserted wire, and a part of the pressing spring is externally attached to the peripheral wall A tube terminal in which an incision is formed for insertion toward the electric wire inserted into the circular hole;
The cross section is formed in a W shape and both ends thereof are used as support parts for mounting on the case, and the convex part located at the center part of the W shape is used as a pressurizing part that comes into contact with the push screw. A pressing spring as a pressing part for pressing the electric wire with two concave parts on both sides of the pressing part located in the center of
A pressing screw for rotatably mounting on the peripheral wall of the hollow cylindrical case and pressing the pressing portion located at the W-shaped central portion of the pressing spring;
In the hollow cylindrical case, the cylindrical terminal is oriented in the direction in which the push screw is present with the incision portion separating the space from the inner wall of the hollow cylindrical case, and the axial center of the cylindrical terminal is the hollow cylindrical case In contact with the inner wall of the hollow cylindrical case in a state parallel to the axis of the
The pressing spring includes two support portions, two pressing portions, and a pressing portion arranged in the axial direction of the cylindrical terminal in a gap between the inner wall of the hollow cylindrical case and the cylindrical terminal in the hollow cylindrical case. One of the two support parts is attached to the wire insertion side of the hollow cylindrical case, and the other is attached to the back side. The two pressing parts can push the outer circumference of the inserted wire through the incision part. Located in
The pressurizing part is disposed so as to be opposed to the tip of the push screw so as to be able to be pressed by a push screw that is rotatably attached to the peripheral wall of the hollow cylindrical case,
The two pressing portions press and compress the outer circumference of the electric wire inserted into the cylindrical terminal by the rotation of the push screw rotatably attached to the peripheral wall of the hollow cylindrical case, and the outer circumference of the electric wire The surface can be brought into contact with the circular arc surface of the inner wall of the circular hole in the cylindrical terminal having an inner diameter formed so as to allow the electric wire to be inserted with a slight margin.
[0006]
The front and rear ends of the pressing spring are supported by the case, and a plurality of pressing portions between the front and rear ends can be pressed from the opening of the incision portion of the tube terminal. The wire is pressed and supported by the wall surface of the circular hole of the tube terminal, and the connection is maintained without breaking.
[0007]
In particular, when connecting the stranded wires shown in the figure, use a tube terminal to provide a plurality of incisions in the part where the pressing part is located, and after inserting the electric wire, tighten the push screw and the pressing part directly presses the electric wire. The stranded wire is supported by the inner wall of the circular hole and the connection is stabilized without loosening the whole.
[0008]
Further, the inner end of the circular hole of the cylindrical terminal is formed into a taper, and the entire stranded wire terminal inserted into the tapered hole portion is pressed against the inner wall of the circular hole, and particularly prevents the twisted wire from collapsing.
[0009]
The present invention can be used without any problem even if it is used not only for a stranded wire but also for a single wire, and an effect such as fixing an electric wire can be obtained.
[0010]
[Action]
When the push screw is tightened, the pressing part tightens the electric wire and terminal, and the looseness of the push screw and the electric wire after a certain period of use is reinforced by the accumulation of elasticity of the press spring. Reinforce.
[0011]
When the cylindrical terminal provided with the incision portion is used, the electric wire is supported on the entire inner wall, and the pressing portion can directly press the electric wire.
[0012]
When using a cylindrical terminal with a tapered hole that is gently narrowed toward the back, even if there is a difference in the outer diameter of the wire, the position where it automatically matches is determined at the tapered portion, and the inserted wire end is pressed against the tapered inner wall This prevents the entire wire from coming loose.
[0013]
【Example】
Referring to the drawings showing the embodiments of the present application, 1 is a cylindrical terminal, which forms a circular hole 2 into which an electric wire 7 is inserted and supported, and the inner part of which forms a tapered hole 3 so that the end of the electric wire 7 is pressed and circular. The original shape is maintained without breaking the entire wire 7 together with the hole 2.
As shown in FIGS. 1 and 3, the inner diameter of the circular hole 2 is formed to a size corresponding to the outer diameter of the electric wire 7 so that the electric wire 7 can be inserted with a little margin, and is inserted by the pressing portions 6 and 6. In the state in which the electric wire 7 is pressed, the inner diameter of the electric wire 7 is formed such that both sides of the electric wire 7 come into contact with the inner wall of the circular hole 2 as shown in FIG. The circular hole 2 is formed as a parallel hole from the opening 12 to a little before the depth. The inner diameter of the circular hole 2 may be a tapered hole with a gentle overall length. As shown in FIG. 5, the tapered hole 3 is tapered only to a part of the inner part, and even if there is a difference in the outer diameter of the electric wire 7, it is adjusted at the tapered hole 3 part at the time of insertion and the terminal part is pressed against the entire inner wall. The connection is stable because it is fixed. Reference numerals 4 and 4 denote incisions, which are provided in the upper portion of the tube terminal 1 and opened in such a size that the pressing portions 6 and 6 can enter without touching. Reference numeral 5 denotes a case, in which an opening is formed on one side, and elongated lateral holes are provided on the front and rear sides. As shown in FIG. 1, support portions 9 and 9 at both ends of a pressing spring 8 having a W-shaped cross section are attached to the horizontal holes. A plurality of pressing parts 6 and 6 are provided in the middle of both ends of the pressing spring 8 and are fixed to the upper part of the electric wire 7 at the position of the incision parts 4 and 4 as shown in FIG. When the pressing screw 11 is brought into contact with the pressing portion of the convex portion located in the center of the W-shaped pressing spring 8 as shown in the drawing and the pressing screw 11 is screwed in, the pressing spring 8 having a W-shaped section is inserted. Recessed pressing parts 6 and 6 located on both sides of the pressing part of the protruding part directly press the electric wire 7 as shown in FIGS. The electric wire 7 can be used not only as a stranded wire but also as a single wire. The pressing spring 8 is firmly pressed and fixed by the pressing screw 11 and accumulates elasticity, and reinforces physical loosening of the pressing screw 11 and loosening due to energization of the electric wire 7. Reference numeral 10 denotes a spring tip, and when it is tightened with a pressing screw 11 provided at the front portion of the case 5, the pressing portions 6 and 6 are operated to simultaneously press the electric wire 7. The push screw 11 firmly presses and fixes the pressing spring 8. The opening 12 has an inner diameter with a slight margin so that the tip of the electric wire 7 can easily enter the tube terminal 1. 13 is a connection part, and is a connection part which each terminal transmits the electricity conducted from the electric wire 7 next. 14 is an anti-slip, and forms many lines in the circular hole 2 to prevent the electric wire 7 from slipping.
[0014]
In FIG. 1, it is a partial sectional side view which shows the connection state of the electric wire 7 in the cylindrical terminal 1 using the press spring 8, and attaches the cylindrical terminal 1 shown in FIG. 7 is inserted and the end is pressed and fixed to the tapered hole 3 at the back, and both ends of the pressing spring 8 are attached to and supported by the lateral holes provided at the front and rear of the case 5, and the V-shaped pressing parts 6 and 6 are formed on the upper part of the tube terminal 1 The push screw 11 is attached to the case 5 at the center upper portion of the pressing spring 8 and is positioned at the entrance of the provided incisions 4. 4. When this is screwed, the pressing spring 8 is lowered and the pressing portions 6 and 6 are connected to the electric wires 7. Are uniformly pressed and connected to the tube terminal 1. The pressed electric wire 7 is supported by the entire wall of the circular hole 2 and the tapered hole 3, and the connection is stable without being damaged. After a certain period of time elapses after the connection, the push screw 11 is physically loosened, but the elasticity stored in the pressure spring 8 acts to reinforce the loosening and the pressing force on the electric wire 7 does not weaken. This eliminates the need for inspection after use for a certain period of time and re-tightening of the push screw 11, thereby eliminating the need for re-tightening.
[0015]
2 is a partial cross-sectional side view of the tube terminal as in FIG. 1. Unlike FIG. 1, an embodiment of the tube terminal 1 is shown in which a circular hole 2 having a thin and gentle taper shape is formed toward the bottom. Is. For example, the cylindrical terminal 1 attached to the case 5 is supported by attaching a rear end 9 of the pressing spring 8 to the rear part, attaching a pressing screw 11 to the upper end of the pressing spring 8, and pressing part 6. 6 is positioned, and when the electric wire 7 is inserted from the opening 12, the tip is inserted into the taper hole 3 at the back and is surrounded by the inner wall as shown in the figure, so that it is strongly tightened. Then, the spring tip 10 is pressed and the pressing portions 6 and 6 press the electric wire 7, and the line portion is supported by the wall surface of the circular hole 2, and the pressing force is stabilized without breaking. The pressing portions 6 and 6 have elasticity, and the pressing force on the electric wire 7 is loosened by the elastic force sufficient to reinforce the looseness of the push screw 11 and the electric wire 7 after a certain period of use. Therefore, the reliability is remarkably improved by maintaining a stable conductive effect, eliminating the need to retighten the push screw 11 and eliminating the need for safety inspections.
[0016]
3 is a cross-sectional view taken along the line AA in FIG. 1, and the electric wire 7 compressed by the pressing screw 11 through the central apex of the pressing spring 8 to the pressing portions 6 and 6 is the wall surface of the circular hole 2 of the cylindrical terminal 1. It shows a complete connection conductive state that is fixed without being broken by support.
[0017]
FIG. 4 is a perspective view of the tube terminal 1, showing the state of the tapered hole 3 and the incised portions 4, 4. The outer shape is not limited to a circle, and may be any shape as necessary. It is effective to make the shape suitable for conditions such as structure.
[0018]
In FIG. 5, it is a sectional side view of the tube terminal 1, and shows the inner wall state of the tapered hole 3, and the depth of the parallel circular hole 2 and the grooves of the incisions 4 and 4. Furthermore, even if the shape of the circular hole 2 of the tube terminal 1 is a parallel hole having the same diameter in the entire length from the mouth opening part 12 to the deep bottom part, the incision parts 4 and 4 are provided to form the pressing parts 6 and 6. If the combined structure with the pressing spring 8 is adopted, the effect of the present application can be sufficiently obtained. Further, if a large number of anti-slip wires 14 are provided in parallel on the lower wall surface of the circular hole 2, the electric wire 7 can be prevented from coming off.
[0019]
Even when used in a place with poor working conditions, each terminal portion of the earth leakage breaker according to the present invention is very lightly tightened even if the rigid pressing spring 8 is pressed by the set screw 11 and is tightened very lightly. A plurality of pressing portions can be pressed at once by simply screwing the push screws 11, the operation is simple and easy, and the labor saving effect can be obtained.
[0020]
In addition, about the terminal part using the press spring 8 of this application, it is applicable to all the terminal parts used conventionally, without being limited to use of the cylindrical terminal 1 of this application, and in that case, it is inferior at all. It also has the feature that the effect by this application is acquired without it.
[0021]
【The invention's effect】
As described above, according to the present invention, the structure that combines the elasticity characteristic of the pressing spring 8 and the firmness of the pressing screw 11 makes it possible to suppress the disadvantage that the pressing spring 8 alone causes loosening. Reinforced by the strength of the screw, the structure that reinforces the disadvantage that the push screw 11 is physically loosened and the looseness of the electric wire due to energization by the accumulated amount of elasticity of the pressing spring 8 provides a strong and rigid pressing force. Reliability has been dramatically improved by long-term stable and stable connection conduction.
[0022]
An electric wire 7 is inserted and supported in the circular hole 2 and the tapered hole 3 of the tube terminal 1, and the pressing portions 6 and 6 directly press the electric wire 7 from the incision portion 4 to enable stable connection.
In particular, the cylindrical tube terminal 1 is provided with a circular hole formed in the inner diameter so that the electric wire can be inserted with a slight margin corresponding to the outer shape of the electric wire 7 to be inserted. In this state, as shown in FIG. 3, both sides of the electric wire are surrounded by a circular arc surface on the inner wall of the circular hole, and there is a feature of protecting the deformation of the shape.
[0023]
When the pressing screw 11 is screwed in, the elasticity of the pressing spring 8 is activated and lightly tightened, and if one pressing spring 11 is further tightened, a plurality of pressing portions 6 and 6 are pressed and operated easily even in a place with poor working conditions. It also has the feature of making accurate connection work easy.
If it repeats, as for the press spring 8, one of the two support parts 9 and 9 is attached to the electric wire insertion side of the said hollow cylindrical case 5, respectively, and the other is attached to the back part side, respectively, and the two press parts 6 and 6 are inserted, respectively. The outer periphery of the front and rear of the electric wire 7 is positioned so as to allow a pressing force through the incisions 4, 4, and the pressurizing portion is rotated by a pressing screw 11 that is rotatably attached to the peripheral wall of the hollow cylindrical case. Since it is arranged so as to be opposed to the tip of the push screw so that the pressing can be performed, as described above, if one pressing spring 11 is tightened, a plurality of pressing portions 6 and 6 can be pressed at the same time. 7 can be tightened firmly and quickly at a plurality of locations.
[0024]
[Brief description of the drawings]
FIG. 1 is a partial side cross-sectional view showing a state in which both ends are supported by a support portion 9, the center portion of a pressing spring 8 is pressed by a pressing screw 11, and an electric wire 7 is pressed against a tube terminal 1. FIG.
FIG. 2 is a partial side cross-sectional view illustrating an example in which a circular hole 2 that is thin and gently tapered toward the bottom is formed, and shows a state in which an electric wire 7 is inserted.
FIG. 3 is a cross-sectional view taken along line AA showing a state where the electric wire 7 is pressed by the pressing portions 6 and 6 from the incisions 4 and 4;
4 is a perspective view of a tube terminal 1. FIG.
FIG. 5 is a side sectional view of a tube terminal 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Tube terminal 2 Circular hole 3 Tapered hole 4 Incision part 5 Case 6 Press part 7 Electric wire 8 Press spring 9 Support part 10 Spring tip 11 Press screw 12 Opening part 13 Connection part 14 Non-slip

Claims

A hollow cylindrical case,
A cylindrical tube terminal having a circular hole formed in the inner diameter of a size that allows the wire to be inserted with a slight margin corresponding to the outer shape of the inserted wire, and a part of the pressing spring is externally attached to the peripheral wall A tube terminal in which an incision is formed for insertion toward the electric wire inserted into the circular hole;
The cross section is formed in a W shape and both ends thereof are used as support parts for mounting on the case, and the convex part located at the center part of the W shape is used as a pressurizing part that comes into contact with the push screw. A pressing spring as a pressing part for pressing the electric wire with two concave parts on both sides of the pressing part located in the center of
A pressing screw for rotatably mounting on the peripheral wall of the hollow cylindrical case and pressing the pressing portion located at the W-shaped central portion of the pressing spring;
In the hollow cylindrical case, the cylindrical terminal is oriented in the direction in which the push screw is present with the incision portion separating the space from the inner wall of the hollow cylindrical case, and the axial center of the cylindrical terminal is the hollow cylindrical case In contact with the inner wall of the hollow cylindrical case in a state parallel to the axis of the
The pressing spring includes two support portions, two pressing portions, and a pressing portion arranged in the axial direction of the cylindrical terminal in a gap between the inner wall of the hollow cylindrical case and the cylindrical terminal in the hollow cylindrical case. One of the two support parts is attached to the wire insertion side of the hollow cylindrical case, and the other is attached to the back side, and the two pressing parts allow the front and rear outer circumferences of the inserted wires to be pressed through the incision part, respectively. Position
The pressurizing part is disposed so as to be opposed to the tip of the push screw so as to be able to be pressed by a push screw that is rotatably attached to the peripheral wall of the hollow cylindrical case,
The two pressing portions press the outer circumferences of the two front and rear portions of the electric wire inserted into the cylindrical terminal by the rotation of the push screw that is rotatably attached to the peripheral wall of the hollow cylindrical case, and the electric wire A terminal characterized in that the outer peripheral surface can be brought into contact with the circular arc surface of the inner wall of the circular hole in the cylindrical terminal having an inner diameter formed so that the electric wire can be inserted with a slight margin. Part structure.

2. An inner diameter of a circular hole in the cylindrical tube terminal is formed so that a back portion is narrowed toward a back bottom portion, and an inserted electric wire end is surrounded and tightened by an inner wall thereof. The structure of the terminal part described.