JPH04118825A

JPH04118825A - Braker

Info

Publication number: JPH04118825A
Application number: JP23792990A
Authority: JP
Inventors: Yasushi Genba; 玄羽　康司; Takayoshi Ishikawa; 尊義石川
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 1990-09-07
Filing date: 1990-09-07
Publication date: 1992-04-20
Anticipated expiration: 2012-01-16
Also published as: JP2570895B2

Abstract

PURPOSE:To convert an electromagnetic repulsive force generated between shunts effectively into contact pressure without decreasing the outward expansion of the shunts and improve the capacity of short-time electricity application by preventing the side plate part of a contact arm and the middle part of a shunt from lapping each other in parallel direction. CONSTITUTION:A cut part 17 is so formed in the side plate parts 6a of a contact arm 6 as to prevent the middle part of a shunt 10 and the side plate part 6a from lapping each other. When the cut part 17 is formed in the side plate part 6a of the contact arm 6 in this way, the middle part of the shunt 10 does not lap the side plate part 6a, so that friction force between both is remarkably decreased. Consequently, the outward expansion of the shunt 10 becomes high and thus rotation of a movable element 5 becomes large. The electromagnetic repulsive force generated between the shunts is converted into contact pressure effectively without lowering the outward expansion of the shunt 10 and short- time electricity application capacity is improved.

Description

【発明の詳細な説明】【産業上の利用分野】この発明は、複数並列接点を有する遮断器に関するもの
である。〔従来の技術１第６図は例えば特開昭５８−１２９７１７号公報に示さ
れた従来の遮断器を示す概略図であり、図において（１
）は筐体、（２）は筐体（１）に複数個並設された固定
接点、（３）は固定接点（２）が設けられた固定導体、
（４）は固定接点（２）と接離する可動接点、（５）は
可動接点（４）が設けられかつ複数個並設された可動子
、（６）は可動子（５）を軸（７）により回動可能に保
持するコンタクトアーム、（８）はコンタクトアーム（
６）を筐体（１）に回動可能に支持する軸（９）は端子
を形成する導体、（１ｏ）は可動子（５）と導体（９）
とを接続するシャント、（１１）は接圧ばね、（１２）
はコンタクトアーム（６）にビン（１３）により連繋さ
れて可動接点（４）・を開閉させる開閉機構部、（１４
）は引外しリレ一部、（１５）は消弧室である。開閉機構部（１２）に動作されてコンタクトアーム（６
）および可動子（５）が回転し、両接点（２）、（４）
が開閉する。その際に発生するアークは消弧室（１５）
で消弧される。上記遮断器におけるコンタクトアーム（６）は、第７図
および第８図に示すように可動子（５）とシャント（１
０）とを隔離して並設するための側板部（６ａ）を有し
ている。【発明が解決しようとする課題１上記のような従来の遮断器ではコンタクトアーム（６）
の側板部（６ａ）とシャント（１０）の側面（１０ａ）
とがラップしているので、複数シャント（１０）間に発
生する電磁吸引力（矢印１６で示す）と側板部（６ａ）
との間で摩擦力が発生した。そのために、シャント（ｌ
Ｏ）が第７図および第８図中想像線で示すように外向き
に膨れて軸（７）を中心に可動子（５）を接点押圧方向
に回転させて接点圧力を高める効果が減ぜられ、短時間
通電容量を高めることができないという問題点があった
。この発明はかかる問題点を解消するためになされたもの
で、シャントの外向きの膨れを減することなくシャント
間に発生する電磁反発力を有効に接点圧力に変換できて
短時間通電容量の向上が図れる遮断器を得ることを目的
とする。〔課題を解決するための手段Ｊ上記目的を達成するために、この発明に係る遮断器は、
コンタクトアームの側板部とシャントの中間部とが並設
方向にラップしないようにしたものである。また、コンタクトアームの側板部をシャントの中間部と
並設方向にラップしないように切欠いてこの側板部の切
欠き部にシャントと共に移動する移動スペーサを設ける
とよい。【作用］この発明においては、シャントの中間部がコンタクトア
ームの側板部とラップしないので、両者間の摩擦力が大
幅に減少する。また、シャントと共に移動スペーサも移動するので、移
動時においてシャント間の電磁吸引力によってシャント
が変形するのを防げる。【実施例）この発明の一実施例を第１図、第２図について説明する
。第１図は要部断面図、第２図は第１図の線ｎ−ＩＩの
断面図であり、上記従来のものと同一または相当部分に
は同一符号を付して説明を省略する０図において、（１
７）はコンタクトアーム（６）の側板部（６ａ）に設け
た切欠き部で、シャント（１０）の中間部が側板部（６
ａ）とラップしないように形成しである。このようにコンタクトアーム（６）の側板部（６ａ）に
切欠き部（１７）を設けておくと、シャント（１０）の
中間部が側板部（６ａ）とラップしないので、両者間の
摩擦力が大幅に減少する。従って、シャント（１０）の外向きの膨れも第２図中想
像線で示すように大きくなるので、可動子（５）の回転
が大きくなる。次に、この発明の他の実施例を第３図、第４図について
説明する。第３図は要部断面図、第４図は第３図の線Ｉ
Ｖ−ＴＶの断面図であり、上記実施例のものと同一また
は相当部分には同一符号を付して説明を省略する０図に
おいて、（１８）は筐体（１）に軸（１９）により回動
可能に支持した移動スペーサで、コンタクトアーム（６
）の側板部（６ａ）の切欠き部（１７）にそれぞれ挿入
配置されている。（２０）は移動スペーサ（１８）を常
時側板部（６ａ）に当接させるためのヒネリバネである
。このように側板部（６ａ）の切欠き部（１７）に移動ス
ペーサ（１８）を配置しておくと、シャント（１０）が
外向きに膨れるとき、電磁吸引力によって移動スペーサ
（１８）も一体的に移動（第４図中想像線で示す）する
（移動スペーサ１８はヒネリバネ２０に抗して軸１９を
支点として回動する）ので、シャント（１０）に掛る摩
擦力が大幅に減少すると共に、シャント（１０）が膨れ
た状態（第４図の想像線の状態）ではシャント（１０）
間に移動スペーサ（１８）が在るので電磁吸引力によっ
てシャント（１０）が変形することがない。第３図および第４図に示す実施例では移動スペーサ（１
８）を筐体（１）側に設けたものを示したが、第５図に
示すようにコンタクトアーム（６）に設けても良い。［発明の効果〕以上のように、この発明によればシャントの外向きの膨
れを減することなくシャント間に発生する電磁反発力を
有効に接点圧力に変換できて短時間通電容量の向上が図
れるという効果が得られるDETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a circuit breaker having a plurality of parallel contacts. [Prior art 1] Fig. 6 is a schematic diagram showing a conventional circuit breaker disclosed in, for example, Japanese Patent Laid-Open No. 58-129717, and in the figure (1
) is a housing, (2) is a fixed contact that is arranged in parallel on the housing (1), (3) is a fixed conductor that is provided with a fixed contact (2),
(4) is a movable contact that comes into contact with and separates from the fixed contact (2), (5) is a mover provided with a movable contact (4) and a plurality of them are arranged in parallel, and (6) is a movable contact (5) that rotates around the movable contact (5). 7) is a contact arm rotatably held, and (8) is a contact arm (
The shaft (9) that rotatably supports 6) on the housing (1) is a conductor forming a terminal, and (1o) is a movable element (5) and a conductor (9).
(11) is a contact spring, (12) is a shunt that connects
(14) is an opening/closing mechanism connected to the contact arm (6) by a pin (13) to open and close the movable contact (4);
) is a part of the tripping relay, and (15) is the arc extinguishing chamber. The contact arm (6) is operated by the opening/closing mechanism (12).
) and mover (5) rotate, both contacts (2), (4)
opens and closes. The arc generated at that time is in the arc extinguishing room (15)
The arc is extinguished. The contact arm (6) in the circuit breaker has a movable element (5) and a shunt (1) as shown in FIGS. 7 and 8.
It has a side plate part (6a) for separating and arranging the parts 0) and 0) in parallel. [Problem to be solved by the invention 1] In the conventional circuit breaker as described above, the contact arm (6)
side plate part (6a) and side surface (10a) of the shunt (10)
Because they overlap, the electromagnetic attraction force (indicated by arrow 16) generated between the multiple shunts (10) and the side plate part (6a)
A frictional force was generated between the For this purpose, a shunt (l
O) expands outward as shown by the imaginary lines in Figures 7 and 8, reducing the effect of rotating the mover (5) around the shaft (7) in the contact pressing direction and increasing the contact pressure. However, there was a problem in that it was not possible to increase the current carrying capacity for a short time. This invention was made to solve this problem, and it is possible to effectively convert the electromagnetic repulsion force generated between the shunts into contact pressure without reducing the outward swelling of the shunts, thereby improving short-term current carrying capacity. The purpose is to obtain a circuit breaker that can achieve this. [Means for Solving the Problems J In order to achieve the above object, the circuit breaker according to the present invention has the following features:
The side plate portion of the contact arm and the intermediate portion of the shunt are prevented from wrapping in the direction in which they are arranged side by side. Further, it is preferable that the side plate portion of the contact arm is cut out so as not to overlap the intermediate portion of the shunt in the parallel direction, and a movable spacer that moves together with the shunt is provided in the cutout portion of the side plate portion. [Operation] In this invention, since the intermediate portion of the shunt does not overlap the side plate portion of the contact arm, the frictional force between the two is significantly reduced. Furthermore, since the movable spacer moves together with the shunt, it is possible to prevent the shunt from deforming due to electromagnetic attraction between the shunts during movement. [Embodiment] An embodiment of the present invention will be described with reference to FIGS. 1 and 2. Fig. 1 is a cross-sectional view of main parts, and Fig. 2 is a cross-sectional view taken along line n-II in Fig. 1, and the same or corresponding parts as those of the above-mentioned conventional one are given the same reference numerals and explanations are omitted. In (1
7) is a notch provided in the side plate part (6a) of the contact arm (6), and the middle part of the shunt (10) is the notch part provided in the side plate part (6a) of the contact arm (6).
It is formed so that it does not overlap with a). By providing the notch (17) in the side plate (6a) of the contact arm (6) in this way, the middle part of the shunt (10) does not overlap with the side plate (6a), which reduces the frictional force between them. is significantly reduced. Therefore, the outward bulge of the shunt (10) also increases as shown by the imaginary line in FIG. 2, so the rotation of the movable element (5) increases. Next, another embodiment of the present invention will be described with reference to FIGS. 3 and 4. Figure 3 is a sectional view of the main part, Figure 4 is line I in Figure 3.
In Figure 0, which is a cross-sectional view of the V-TV, parts that are the same or equivalent to those of the above embodiment are given the same reference numerals and explanations are omitted, (18) is a shaft (19) attached to the housing (1). The contact arm (6
) are respectively inserted into the notches (17) of the side plate portions (6a). (20) is a torsion spring for constantly bringing the movable spacer (18) into contact with the side plate portion (6a). If the movable spacer (18) is arranged in the notch (17) of the side plate (6a) in this way, when the shunt (10) expands outward, the movable spacer (18) will also be integrated with the electromagnetic attraction force. (The moving spacer 18 rotates about the shaft 19 as a fulcrum against the twisting spring 20.) Therefore, the frictional force applied to the shunt (10) is significantly reduced and , when the shunt (10) is swollen (the state shown by the imaginary line in Figure 4), the shunt (10)
Since there is a moving spacer (18) in between, the shunt (10) will not be deformed by electromagnetic attraction force. In the embodiment shown in FIGS. 3 and 4, the movable spacer (1
8) is shown as being provided on the housing (1) side, but it may also be provided on the contact arm (6) as shown in FIG. [Effects of the Invention] As described above, according to the present invention, the electromagnetic repulsive force generated between the shunts can be effectively converted into contact pressure without reducing the outward swelling of the shunts, and the short-time current carrying capacity can be improved. You can achieve the effect of being able to

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はこの発明の一実施例を示す要部断面図、第２図
は第１図の線ＩＩ　−ＩＩの断面図、第３図はこの発明
の他の実施例を示す要部断面図、第４図は第３図の線Ｉ
Ｖ−ＴＶの断面図、第５図はこの発明のさらに異なる実
施例を示す要部断面図、第６図は従来の遮断器を示す概
略図、第７図は第６図の要部を示す断面図、第８図は第
７図の線■−■の断面図である。図において、（１）は筐体、（２）は固定接点（４）は
可動接点、（５）は可動子、（６）はコンタクトアーム
、（６ａ）はコンタクトアームの側板部、（９）は導体
、（１０）はシャント、（１７）は切欠き部、（１８）
は移動スペーサを示す。なお、各図中同一符号は同一または相当部分を示す。代理人　弁理士　　大　　岩　　増　　雄第図第図第図１８：移動スペーサ第図第図FIG. 1 is a sectional view of a main part showing one embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II in FIG. 1, and FIG. 3 is a sectional view of a main part showing another embodiment of the invention. , Figure 4 is line I in Figure 3.
A sectional view of a V-TV, FIG. 5 is a sectional view of a main part showing still another embodiment of the present invention, FIG. 6 is a schematic diagram showing a conventional circuit breaker, and FIG. 7 shows a main part of FIG. 6. The cross-sectional view, FIG. 8, is a cross-sectional view taken along the line ■--■ in FIG. In the figure, (1) is the housing, (2) is the fixed contact, (4) is the movable contact, (5) is the mover, (6) is the contact arm, (6a) is the side plate of the contact arm, (9) is a conductor, (10) is a shunt, (17) is a notch, (18)
indicates a moving spacer. Note that the same reference numerals in each figure indicate the same or corresponding parts. Agent Patent Attorney Masuo Oiwa Figure 18: Moving spacer Figure 18

Claims

【特許請求の範囲】[Claims]

（１）筺体側に複数並設される固定接点と、この各固定
接点と接離する可動接点をそれぞれ有しかつ複数並設さ
れる可動子と、この各可動子を側板部で隔離して並設状
態に保持するコンタクトアームと、このコンタクトアー
ムの前記側板部を挟んで並設状態に配置されかつ前記各
可動子を各導体にそれぞれ接続するシャントとを有する
ものにおいて、前記コンタクトアームの側板部と前記シャントの中間部
とが並設方向にラップしないようにしたことを特徴とす
る遮断器。(1) A plurality of fixed contacts arranged in parallel on the housing side, a plurality of movers each having a movable contact that comes into contact with and separates from each of the fixed contacts, and a plurality of movers arranged in parallel, and each of the movers is separated by a side plate part. A contact arm that is held in a parallel state, and a shunt that is arranged in a parallel state across the side plate portion of the contact arm and connects each of the movable elements to each conductor, the side plate of the contact arm. A circuit breaker characterized in that the intermediate portion of the shunt and the intermediate portion of the shunt do not overlap in the direction in which they are arranged side by side.

（２）コンタクトアームの側板部をシャントの中間部と
並設方向にラップしないように切欠いて、この側板部の
切欠き部に前記シャントと共に移動する移動スペーサを
設けたことを特徴とする請求項１記載の遮断器。(2) A side plate portion of the contact arm is cut out so as not to overlap the intermediate portion of the shunt in a direction in which it is arranged in parallel, and a movable spacer that moves together with the shunt is provided in the cutout portion of the side plate portion. The circuit breaker according to 1.