JPH0755798Y2 - Circuit breaker - Google Patents
Circuit breakerInfo
- Publication number
- JPH0755798Y2 JPH0755798Y2 JP1987134944U JP13494487U JPH0755798Y2 JP H0755798 Y2 JPH0755798 Y2 JP H0755798Y2 JP 1987134944 U JP1987134944 U JP 1987134944U JP 13494487 U JP13494487 U JP 13494487U JP H0755798 Y2 JPH0755798 Y2 JP H0755798Y2
- Authority
- JP
- Japan
- Prior art keywords
- handle
- coil spring
- receiving portion
- circuit breaker
- operating handle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Breakers (AREA)
Description
【考案の詳細な説明】[Detailed description of the device]
この考案は、配線用しゃ断器などの回路しゃ断器におい
て、電流しゃ断時に操作ハンドル部からガスやアークが
噴出しないようにした改良に関する。The present invention relates to an improvement in a circuit breaker such as a breaker for wiring, which prevents gas or arc from being ejected from an operation handle portion when a current is cut off.
第6図及び第7図に基づいて、従来の配線用回路しゃ断
器の一例を説明する。 第6図において、カバー1及びベース2からなる本体ケ
ース内には、固定接点3を備えた固定接触子4及び可動
接点5を備えた可動接触子6からなるしゃ断部、このし
ゃ断部を囲む消弧室7、開閉機構8、引外し装置9、操
作ハンドル10などから構成されており、図は配線用回路
しゃ断器の投入状態を示している。 開閉機構8は、軸11により可動接触子6と連結され軸12
を中心に開閉動作をする可動接触子ホルダ13、軸14によ
り回動自在に支持されたラッチ15、可動接触子ホルダ13
及びラッチ15にそれぞれ軸16及び17で結合されたトグル
リンク18、開閉機構8部分の略中心の図示しない支点を
中心にして図の左右方向に回動するハンドルレバー19、
トグルリンク18の連結軸20とハンドルレバー19との間に
取り付けられた操作スプリング21などから構成されてい
る。 引外し装置9は熱動電磁型で、バイメタル22、引外しコ
イル23で駆動される可動鉄片24、トリップバー25、一端
がこのトリップバー25に係合し他端がラッチ15に係合す
るラッチ受け26などからなっている。 操作ハンドル10は、ハンドルレバー9の頭部に被嵌する
ようにして取り付けられており、カバー1のハンドル受
け部27の窓27aからつまみ部10aを覗かせている。操作ハ
ンドル10とハンドル受け部27の互いの対向面は共に円弧
状に形成されている。この円弧は操作ハンドル10がハン
ドルレバー9とともに回動する際の回転半径に沿って形
成されており、操作ハンドル10の基部10bは操作ハンド
ル10の回動範囲に渡ってハンドル受け部27の窓27aを閉
塞するようになっている。 さて、このように構成された回路しゃ断器において、操
作ハンドル10を図の投入位置から左方向に回動させる
と、操作スプリング21はトグルリンク18の作用線を越え
てその左側に移行し、トグルリンク18が図上逆くの字形
に折れ曲がって、可動接触子ホルダ13は軸12を中心に図
の左向きに回動して接点が開離する。 また、過負荷時あるいは短絡時に引外し装置9が動作す
ると、ラッチ受け26とラッチ15の係合が解除され、ラッ
チ15はラッチ軸14を中心に図の右方向に回動し、ストッ
パ軸28は係止される。その結果、操作スプリング21はト
グルリンク18の作用線を越えるため、上述した場合と同
様に接点が開離する。An example of a conventional circuit breaker for wiring will be described with reference to FIGS. 6 and 7. In FIG. 6, in a main body case composed of a cover 1 and a base 2, a blocking portion composed of a fixed contact 4 having a fixed contact 3 and a movable contact 6 having a movable contact 5, and an eraser surrounding the blocking portion. It is composed of an arc chamber 7, an opening / closing mechanism 8, a trip device 9, an operation handle 10 and the like, and the drawing shows a closed state of a circuit breaker for wiring. The opening / closing mechanism 8 is connected to the movable contact 6 by a shaft 11 and the shaft 12
Movable contact holder 13, which opens and closes around, latch 15 rotatably supported by shaft 14, movable contact holder 13
And a toggle link 18, which is connected to the latch 15 by shafts 16 and 17, respectively, and a handle lever 19, which rotates in the left-right direction in the drawing about a fulcrum not shown, which is substantially the center of the opening / closing mechanism 8.
The toggle link 18 is composed of an operating spring 21 and the like mounted between a connecting shaft 20 and a handle lever 19. The trip device 9 is a thermo-electromagnetic type, and has a bimetal 22, a movable iron piece 24 driven by a trip coil 23, a trip bar 25, a latch having one end engaged with the trip bar 25 and the other end engaged with a latch 15. It consists of a receiver 26 and the like. The operation handle 10 is attached so as to fit on the head of the handle lever 9, and the knob 10a is seen through the window 27a of the handle receiving portion 27 of the cover 1. The facing surfaces of the operation handle 10 and the handle receiving portion 27 are both formed in an arc shape. This arc is formed along the turning radius when the operation handle 10 rotates together with the handle lever 9, and the base portion 10b of the operation handle 10 extends over the rotation range of the operation handle 10 and the window 27a of the handle receiving portion 27. Is designed to be blocked. Now, in the circuit breaker configured as described above, when the operation handle 10 is rotated leftward from the closing position in the figure, the operation spring 21 moves to the left side beyond the line of action of the toggle link 18, and toggles. The link 18 is bent in an inverted shape in the figure, and the movable contact holder 13 rotates about the shaft 12 in the left direction in the figure to open the contact. When the trip device 9 operates during overload or short circuit, the latch receiver 26 and the latch 15 are disengaged, and the latch 15 rotates around the latch shaft 14 in the right direction in the drawing, and the stopper shaft 28 is rotated. Is locked. As a result, the operating spring 21 exceeds the line of action of the toggle link 18, so that the contacts are opened as in the case described above.
第7図にハンドル受け部27及び操作ハンドル10部分を拡
大して示す。 第7図において、操作ハンドル10は回路しゃ断器の投入
及び解放動作に伴って、そのつまみ部10aはハンドル受
け部27の窓27aの全長Aにわたって移動するが、その間
操作ハンドル12は窓27aを常に閉塞するようになってお
り、操作ハンドル10及びハンドル受け部27の互いの対向
面10c,27bの円弧は半径を一致させてある。 しかしながら、操作ハンドル10が円滑に運動するために
はハンドル受け部27に対して若干の遊びが必要で、操作
ハンドル10及びハンドル受け部27の円弧状の対向面10c,
27b間には、第7図に示すように隙間Bを設けてある。 ところが、回路しゃ断器内部は上記隙間Bを通して外部
大気に通じるため、過負荷や短絡しゃ断時の相当大きい
アークの場合には、発生したガスあるいは炎がハンドル
受け部27の窓27aから噴出することがあり、人や周りの
設備に危害をあたえる危険があった。また、上記隙間B
を通して外部大気中の塵埃が回路しゃ断器内に侵入し
て、塵埃の多い設置環境では開閉機構8部への付着によ
る操作不良や、接点3,5間への侵入による接触不良を生
ずることがあった。 この考案は、操作ハンドルとハンドル受け部との間の隙
間を無くすことにより、ハンドル受け部の窓からのしゃ
断時のガスや炎の噴出と外気からの塵埃の侵入とを防止
し、安全で信頼性の高い回路しゃ断器を提供することを
目的とするものである。FIG. 7 shows an enlarged view of the handle receiving portion 27 and the operation handle 10. In FIG. 7, the operating handle 10 moves along the entire length A of the window 27a of the handle receiving portion 27 with the opening and closing operations of the circuit breaker, while the operating handle 12 constantly opens the window 27a. The arcs of the facing surfaces 10c and 27b of the operation handle 10 and the handle receiving portion 27 are made to have the same radius. However, in order for the operating handle 10 to move smoothly, some play is required for the handle receiving portion 27, and the arcuate facing surfaces 10c of the operating handle 10 and the handle receiving portion 27 are
A gap B is provided between 27b as shown in FIG. However, since the inside of the circuit breaker communicates with the outside atmosphere through the gap B, in the case of a considerably large arc at the time of overload or short circuit interruption, the generated gas or flame may be ejected from the window 27a of the handle receiving portion 27. There was a risk of harming people and surrounding equipment. In addition, the gap B
Dust in the external atmosphere may enter the circuit breaker through the circuit breaker, and in a dusty installation environment, operation failure due to adhesion to the switching mechanism 8 part or contact failure due to entry between the contacts 3 and 5 may occur. It was This invention eliminates the gap between the operating handle and the handle receiving part to prevent gas and flame from spouting from the window of the handle receiving part and dust from entering the outside, and is safe and reliable. The purpose of the present invention is to provide a circuit breaker with high flexibility.
この考案は、開閉機構のハンドルレバーの頭部に被嵌し
て取り付けられた操作ハンドルが、カバーのハンドル受
け部の窓からつまみ部を覗かせてカバーの内側に配置さ
れ、操作ハンドルとハンドル受け部は互いの対向面が共
に円弧状に形成された回路しゃ断器において、操作ハン
ドルとハンドルレバーとの間にコイルばねを挿入し、前
記操作ハンドルをハンドル受け部に押圧するようにする
とともに、前記操作ハンドルに断面形状が亀甲状でその
長径側の幅寸法Pと短径側の幅寸法Rとが前記コイルば
ねの内径Qに対して僅かにP>Q>Rの関係になり、か
つ先端が傾斜した柱状突起を設け、この柱状突起に前記
コイルばねの端部を圧入するものである。According to this invention, the operation handle fitted and attached to the head of the handle lever of the opening / closing mechanism is arranged inside the cover with the knob part looking through the window of the handle receiving part of the cover. In the circuit breaker in which the surfaces facing each other are both arcuate, a coil spring is inserted between the operating handle and the handle lever to press the operating handle against the handle receiving portion, and The operating handle has a hexagonal cross section, and the width dimension P on the major axis side and the width dimension R on the minor axis side have a relation of slightly P>Q> R with respect to the inner diameter Q of the coil spring, and the tip is An inclined columnar protrusion is provided, and the end of the coil spring is pressed into the columnar protrusion.
この考案によれば、操作ハンドルはばね力によりハンド
ル受け部に押圧されるため両者間に隙間が生じない。ま
た、コイルばねの端部を圧入する柱状突起は断面形状を
亀甲状とし、その長径側の幅寸法Pと短径側の幅寸法R
とが前記コイルばねの内径Qに対して僅かにP>Q>R
の関係になるようにしたが、この柱状突起へのコイルば
ねの圧入は掛け止め用の突起などを乗り越えると必要が
ないので容易であり、圧入後のコイルばねは亀甲状断面
の長径側の角部で押し広げられた端部で柱状突起を弾性
的に把持して操作ハンドルに確実に保持される。According to this invention, since the operation handle is pressed against the handle receiving portion by the spring force, there is no gap between the two. Further, the columnar projections into which the ends of the coil springs are press-fitted have a hexagonal cross-sectional shape, and the width dimension P on the major diameter side and the width dimension R on the minor diameter side thereof.
Is slightly P>Q> R with respect to the inner diameter Q of the coil spring.
However, it is easy to press fit the coil spring into this columnar protrusion because it is not necessary to go over the protrusion for locking, etc., and the coil spring after press fitting should have a corner on the long diameter side of the hexagonal section. The column-shaped projection is elastically gripped by the end portion that is spread by the section, and is securely held by the operation handle.
以下、第1図〜第5図に基づいてこの考案の実施例を説
明する。なお、第6図及び第7図の従来構成と同一又は
対応する部分には同一の符号を付け説明を省略する。 第3図及び第4図は操作ハンドル10を示し、その底部に
は、後述するように操作ハンドル10をハンドルレバー19
の頭部に被嵌して取り付けるための両側に貫通する凹所
29が設けられている。この凹所29の頂部中央にはさらに
円形の凹所30が設けられ、そしてこの凹所30の中心に柱
状突起31が形成されている。 柱状突起31は、第4図に示すように、角柱の前後を三角
柱で挟んだような亀甲状の断面形状をしており、三角柱
部分の先端は斜めに削られて傾斜面31a,31aになってい
る(第3図)。柱状突起31の長径側の幅寸法Pと小径側
の幅寸法Rとは、第5図に示すコイルばね32の内径Qに
対して僅かにP>Q>Rの関係に設定されている。 さて、第5図のコイルばね32は、次のようにして上記柱
状突起31に取り付けられる。すなわち、コイルばね32の
一端部32aを上記柱状突起31の傾斜面31a,31aに当てが
い、コイルばね32を回しながらその一端部32aの少なく
とも1巻きを柱状突起31の垂直部31bに嵌め込む。この
とき、コイルばね32の内径Qに対して、垂直部31bの長
径側の幅寸法Pは僅かに大きく、また小径側の幅寸法R
は僅かに小さいので、コイルばね32は亀甲状断面の垂直
部31bの長径側の角部で押し広げられた端部32aが垂直部
31bを弾性的に把持して操作ハンドル10に確実に保持さ
れる(第2図)。また、柱状突起31へのコイルばね32の
圧入は、傾斜面31a,31aをガイドにして単に挿入するだ
けでよいので、掛け止め用の突起を乗り越えさせてこれ
に掛止させる構成に比べて作業が容易である。 上述したようにコイルばね32を取り付けた操作ハンドル
10は、第1図に示すように、ハンドルレバー19の頭部上
面にコイルばね32の他端部32bを押し当てた状態で凹所2
9がハンドルレバー19の頭部L曲げ部19aに被嵌される。
操作ハンドル10の凹所29とハンドルレバー19の頭部19a
とは、操作ハンドル10がハンドルレバー19に対してその
軸方向に摺動できる程度に緩く嵌め込まれるようになっ
ている。その後、操作ハンドル10の上方からカバー1が
取り付けられる。 このような構成において、コイルばね32は操作ハンドル
10をハンドル受け部27に押圧して、円弧状の対向面10c,
27b同志を密着させ、その間の隙間を排除する。この密
着は操作ハンドル10の静止状態は勿論、開閉動作の際も
操作ハンドル10がばね力を受けながらハンドル受け部27
の対向面27b上を摺動することにより維持される。 その結果、ハンドル受け部27の窓27aは操作ハンドル10
により常時完全に閉塞され、しゃ断動作時のガスあるい
は炎の噴出、及び常時の塵埃の侵入が阻止される。な
お、コイルばね32は、操作ハンドル10の重量と上記隙間
B(第7図)の大きさに応じて線径、巻数などを適宜に
設定でき、操作ハンドル10とハンドル受け部27間の摩擦
力が操作ハンドル10の移動を妨げる荷重以下になるよう
にコイルばね32のばね力を設定すれば、しゃ断動作時に
操作不良を生じさせることはない。An embodiment of the present invention will be described below with reference to FIGS. It should be noted that the same or corresponding parts as those of the conventional configuration shown in FIGS. 3 and 4 show the operation handle 10, and the operation handle 10 is provided on the bottom of the operation handle 10 as will be described later.
Recesses on both sides for fitting and mounting on the head of
29 are provided. A circular recess 30 is further provided at the center of the top of the recess 29, and a columnar protrusion 31 is formed at the center of the recess 30. As shown in FIG. 4, the columnar protrusion 31 has a hexagonal cross-sectional shape such that the front and rear of a prism are sandwiched by triangular prisms, and the tip of the triangular prism portion is cut diagonally to form inclined surfaces 31a and 31a. (Fig. 3). The width dimension P on the long diameter side and the width dimension R on the small diameter side of the columnar protrusion 31 are set to have a relationship of slightly P>Q> R with respect to the inner diameter Q of the coil spring 32 shown in FIG. The coil spring 32 shown in FIG. 5 is attached to the columnar protrusion 31 as follows. That is, one end 32a of the coil spring 32 is applied to the inclined surfaces 31a, 31a of the columnar protrusion 31, and at least one turn of the one end 32a is fitted into the vertical portion 31b of the columnar protrusion 31 while rotating the coil spring 32. At this time, with respect to the inner diameter Q of the coil spring 32, the width dimension P of the vertical portion 31b on the major diameter side is slightly larger, and the width dimension R on the smaller diameter side R.
Since the coil spring 32 is slightly small, the end 32a of the coil spring 32, which is widened at the corner on the long diameter side of the vertical part 31b of the hexagonal cross section, has a vertical part.
31b is elastically gripped and securely held by the operation handle 10 (Fig. 2). Further, since the coil spring 32 is press-fitted into the columnar protrusion 31 by simply inserting it by using the inclined surfaces 31a, 31a as guides, it is more workable than the structure in which the latching protrusion is passed over and latched. Is easy. Operation handle with coil spring 32 attached as described above
As shown in FIG. 1, reference numeral 10 denotes a recess 2 with the other end 32b of the coil spring 32 pressed against the upper surface of the head of the handle lever 19.
9 is fitted on the head L bent portion 19a of the handle lever 19.
Recess 29 of operating handle 10 and head 19a of handle lever 19
Means that the operation handle 10 is loosely fitted to the handle lever 19 to such an extent that it can slide in its axial direction. After that, the cover 1 is attached from above the operation handle 10. In such a configuration, the coil spring 32 is the operating handle.
10 is pressed against the handle receiving portion 27, and the arcuate facing surface 10c,
27b Close up the gap between the two and eliminate the gap between them. This close contact is caused not only by the operation handle 10 being in a stationary state, but also when the operation handle 10 is opened and closed while receiving the spring force.
It is maintained by sliding on the facing surface 27b of the. As a result, the window 27a of the handle receiving portion 27 is closed by the operating handle 10.
As a result, it is completely closed at all times, and gas or flame jetting at the time of the shutoff operation and dust intrusion at all times are prevented. The coil spring 32 can have a wire diameter, the number of turns, and the like appropriately set according to the weight of the operation handle 10 and the size of the gap B (FIG. 7), and the friction force between the operation handle 10 and the handle receiving portion 27 can be set. If the spring force of the coil spring 32 is set so as to be equal to or less than the load that hinders the movement of the operation handle 10, the operation failure does not occur during the cutting operation.
この考案は、操作ハンドルとハンドル受け部との間にコ
イルばねを挿入し、操作ハンドルをハンドル受け部に押
圧するようにしたので、操作ハンドルとハンドル受け部
との間の隙間が排除され、ハンドル受け部の窓部からの
しゃ断動作時のガスや炎の噴出、及び常時の塵埃の侵入
を防止することができる。また、上記コイルばねは操作
ハンドルの柱状突起に弾性的に保持させるようにしたの
で、掛け止め用の突起を乗り越えさせてこれに掛止させ
る構成に比べて操作ハンドルへのコイルばねの取付けが
容易で操作ハンドル部の組立作業が簡単となる。In this invention, the coil spring is inserted between the operating handle and the handle receiving portion to press the operating handle against the handle receiving portion, so that the gap between the operating handle and the handle receiving portion is eliminated, and the handle It is possible to prevent the gas and flame from being ejected from the window of the receiving portion during the cutoff operation and the intrusion of dust at all times. Further, since the coil spring is elastically held by the columnar protrusion of the operation handle, it is easier to attach the coil spring to the operation handle as compared with a structure in which the protrusion for locking is passed over and latched. As a result, the assembly work of the operation handle is simplified.
第1図はこの考案の実施例の要部断面図、第2図はばね
を取り付けた状態の操作ハンドルの断面図、第3図は第
2図の操作ハンドルの断面図、第4図は第3図の底面
図、第5図は第2図のばねの斜視図、第6図は従来の回
路しゃ断器の断面図、第7図は第6図の要部拡大断面図
である。 1:カバー、8:開閉機構、10:操作ハンドル、10a:操作ハ
ンドルのつまみ部、19:ハンドルレバー、27:ハンドル受
け部、27:ハンドル受け部の窓、32:コイルばね。1 is a sectional view of an essential part of an embodiment of the present invention, FIG. 2 is a sectional view of an operating handle with a spring attached, FIG. 3 is a sectional view of the operating handle of FIG. 2, and FIG. FIG. 3 is a bottom view of FIG. 3, FIG. 5 is a perspective view of the spring of FIG. 2, FIG. 6 is a sectional view of a conventional circuit breaker, and FIG. 7 is an enlarged sectional view of an essential part of FIG. 1: cover, 8: opening / closing mechanism, 10: operating handle, 10a: knob of operating handle, 19: handle lever, 27: handle receiving portion, 27: window of handle receiving portion, 32: coil spring.
Claims (1)
て取り付けられた操作ハンドルが、カバーのハンドル受
け部の窓からつまみ部を覗かせてカバーの内側に配置さ
れ、操作ハンドルとハンドル受け部は互いの対向面が共
に円弧状に形成された回路しゃ断器において、操作ハン
ドルとハンドルレバーとの間にコイルばねを挿入し、前
記操作ハンドルをハンドル受け部に押圧するようにする
とともに、前記操作ハンドルに断面形状が亀甲状でその
長径側の幅寸法Pと短径側の幅寸法Rとが前記コイルば
ねの内径Qに対して僅かにP>Q>Rの関係になり、か
つ先端が傾斜した柱状突起を設け、この柱状突起に前記
コイルばねの端部を圧入したことを特徴とする回路しゃ
断器。1. An operating handle fitted and attached to the head of a handle lever of an opening / closing mechanism is disposed inside the cover with a knob portion looking through a window of a handle receiving portion of the cover. In the circuit breaker, the receiving portions of which face to face each other are both formed in an arc shape, a coil spring is inserted between the operating handle and the handle lever, and the operating handle is pressed against the handle receiving portion. The operating handle has a hexagonal cross-section, and the width dimension P on the major diameter side and the width dimension R on the minor diameter side thereof have a relationship of slightly P>Q> R with respect to the inner diameter Q of the coil spring, and the tip end. A circuit breaker characterized in that an inclined columnar protrusion is provided, and the end of the coil spring is press-fitted into the columnar protrusion.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1987134944U JPH0755798Y2 (en) | 1987-09-03 | 1987-09-03 | Circuit breaker |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1987134944U JPH0755798Y2 (en) | 1987-09-03 | 1987-09-03 | Circuit breaker |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6438745U JPS6438745U (en) | 1989-03-08 |
JPH0755798Y2 true JPH0755798Y2 (en) | 1995-12-20 |
Family
ID=31394142
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1987134944U Expired - Lifetime JPH0755798Y2 (en) | 1987-09-03 | 1987-09-03 | Circuit breaker |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0755798Y2 (en) |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59144856U (en) * | 1983-03-16 | 1984-09-27 | 三菱電機株式会社 | circuit break |
-
1987
- 1987-09-03 JP JP1987134944U patent/JPH0755798Y2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPS6438745U (en) | 1989-03-08 |
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