JP3344520B2 - Circuit breaker switching mechanism - Google Patents
Circuit breaker switching mechanismInfo
- Publication number
- JP3344520B2 JP3344520B2 JP20804794A JP20804794A JP3344520B2 JP 3344520 B2 JP3344520 B2 JP 3344520B2 JP 20804794 A JP20804794 A JP 20804794A JP 20804794 A JP20804794 A JP 20804794A JP 3344520 B2 JP3344520 B2 JP 3344520B2
- Authority
- JP
- Japan
- Prior art keywords
- support shaft
- frame
- circuit breaker
- trip crossbar
- trip
- 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 - Fee Related
Links
Landscapes
- Breakers (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、配線用遮断器や漏電
遮断器などの回路遮断器の開閉機構に関し、特にトリッ
プクロスバーの組み込みを容易にするための改良に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an open / close mechanism for a circuit breaker such as a circuit breaker or an earth leakage breaker, and more particularly to an improvement for facilitating the installation of a trip crossbar.
【０００２】[0002]
【従来の技術】図６は従来の開閉機構を示す側面図であ
る。図において、開閉機構は鉄板からＵ字形に折り曲げ
形成されたフレーム１に機構部品が搭載されて構成され
ているが、その機構部品の一部としてトリップクロスバ
ー２がフレーム１の左右に相対する側板１ａ間に支軸３
により回動自在に支持され、このトリップクロスバー２
は捩じりばねからなる復帰スプリング４により図の反時
計方向に付勢され、側板１ａの端面に当接して図示直立
状態を保っている。詳細は省略するが、トリップクロス
バー２は過電流状態の発生時に図示しない過電流引外し
装置からの力を受けて回動し、開閉機構の鎖錠を解いて
これをトリップ動作させるものである。2. Description of the Related Art FIG. 6 is a side view showing a conventional opening / closing mechanism. In the figure, the opening / closing mechanism is configured by mounting mechanical parts on a frame 1 formed by bending an iron plate into a U-shape. As a part of the mechanical parts, a trip cross bar 2 is provided on a side plate facing the left and right sides of the frame 1. Support shaft 3 between 1a
The trip crossbar 2 is rotatably supported by the
Is urged in the counterclockwise direction in the figure by a return spring 4 composed of a torsion spring, and abuts against the end face of the side plate 1a to maintain the upright state in the figure. Although the details are omitted, the trip crossbar 2 is rotated by receiving a force from an overcurrent trip device (not shown) when an overcurrent state occurs, unlocks the opening / closing mechanism, and trips the trip mechanism. .
【０００３】[0003]
【発明が解決しようとする課題】ところが、このような
従来の開閉機構は組立に際して、側板１ａとトリップク
ロスバー２の図示しない軸受穴同士を合わせて、これに
支軸３を挿通しなければならないため、その作業が面倒
であった。また、支軸３の軸受部に潤滑油（グリース）
溜めがないためグリースの保持量が十分でなく、長期間
の使用で潤滑不良を生じることがあった。この発明は、
トリップクロスバーの組み付けが容易であり、またその
軸受部にグリースを十分に保持させることのできる回路
遮断器の開閉機構を提供することを目的とするものであ
る。However, when assembling such a conventional opening / closing mechanism, the side plate 1a and the unillustrated bearing holes of the trip crossbar 2 must be aligned with each other, and the support shaft 3 must be inserted therethrough. Therefore, the work was troublesome. Also, lubricating oil (grease) is applied to the bearing of the support shaft 3.
Since there is no reservoir, the amount of retained grease is not sufficient, and poor lubrication may occur during long-term use. The present invention
It is an object of the present invention to provide a circuit breaker opening / closing mechanism that can easily assemble a trip crossbar and can sufficiently hold grease in a bearing portion thereof.
【０００４】[0004]
【課題を解決するための手段】この発明は、Ｕ字形に折
り曲げ形成されたフレームの相対する側板間にトリップ
クロスバーが支軸により回動自在に支持される回路遮断
器の開閉機構において、トリップクロスバーの両側に外
周上の相対する２箇所を互いに平行な平坦面とした支軸
を一体に突出形成するとともに、前記支軸を支承するフ
レームの側板の軸受穴を幅が前記平坦面間の厚みより僅
かに広いスリットを介して前記側板の端面に開口させる
ことにより、上記目的を達成するものとする。SUMMARY OF THE INVENTION The present invention relates to a circuit breaker switching mechanism in which a trip crossbar is rotatably supported by a support shaft between opposing side plates of a frame bent and formed in a U-shape. On both sides of the crossbar, a support shaft having two flat surfaces parallel to each other on the outer periphery is formed so as to protrude integrally, and a bearing hole of a side plate of a frame supporting the support shaft has a width between the flat surfaces. The above-mentioned object is achieved by opening the end face of the side plate through a slit slightly wider than the thickness.
【０００５】[0005]
【作用】フレームに対するトリップクロスバーの組み付
けは、平坦面でスリットを潜らせて支軸を軸受穴に挿入
し、次いで平坦面がスリットと直交するようにトリップ
クロスバーを回転させればよいので簡単である。また、
支軸の平坦面と軸受穴の周縁との間に空間ができるの
で、この空間をグリース溜めとしてグリースを保持させ
ることができる。[Function] It is easy to assemble the trip crossbar to the frame because it is enough to insert the support shaft into the bearing hole by digging the slit on the flat surface, and then rotate the trip crossbar so that the flat surface is orthogonal to the slit. It is. Also,
Since a space is formed between the flat surface of the support shaft and the peripheral edge of the bearing hole, the space can be used as a grease reservoir to hold grease.
【０００６】[0006]
【実施例】図１〜図５は２極式回路遮断器におけるこの
発明の実施例を示すもので、図１は開閉機構のＯＦＦ状
態の側面図、図２の（Ａ）はトリップクロスバーの背面
図、（Ｂ）はその側面図、図３の（Ａ）はフレームの側
面図、（Ｂ）はその背面図、図４は図１の要部拡大図、
図５の（Ａ）〜（Ｃ）はトリップクロスバーをフレーム
に組み付ける手順を示す側面図である。なお、従来例と
対応する部分には同一の符号を用いるものとする。ま
ず、図２において、トリップクロスバー２はモールド樹
脂から一体成形され、支軸３が形成された基部の上部に
図示しない過電流引外し装置からの力を受ける左右極の
受動腕が対象に立ち上げ形成された略逆３角形の正面形
状を呈している。支軸３は基部の両側に一体に突出形成
され、その外周上の相対する２箇所は互いに平行な平坦
面３ａ（図２（Ｂ））とされている。1 to 5 show an embodiment of the present invention in a two-pole circuit breaker. FIG. 1 is a side view of an open / close mechanism in an OFF state, and FIG. 3B is a side view of the frame, FIG. 3A is a side view of the frame, FIG. 3B is a rear view thereof, FIG. 4 is an enlarged view of a main part of FIG.
FIGS. 5A to 5C are side views showing a procedure for assembling the trip crossbar to the frame. Note that the same reference numerals are used for the portions corresponding to the conventional example. First, in FIG. 2, the trip crossbar 2 is integrally molded from a molding resin, and the left and right pole passive arms which receive a force from an overcurrent trip device (not shown) stand above the base on which the support shaft 3 is formed. It has a substantially inverted triangular front shape formed by raising. The support shaft 3 is integrally formed on both sides of the base, and two opposing locations on the outer periphery thereof are parallel flat surfaces 3a (FIG. 2B).
【０００７】一方、図３において、フレーム１は鉄板か
らの打抜き・曲げ加工により、左右に相対する側板１ａ
を持つＵ字形に折り曲げ形成されて、一方（図３（Ａ）
の奥側）の側板１ａは他方（同じく手前側）の側板１ａ
よりも高く立ち上げられている。フレーム１の左右の側
板１ａの下部背面側には支軸３を支承する軸受穴５が同
心に設けられているが、この軸受穴５は幅ｗが支軸３の
前記平坦面３ａ間の厚みｔより僅かに広い水平なスリッ
ト６を介して側板１ａの背面側端面に開口させられてい
る。このフレーム１にはトリップクロスバー２が復帰ス
プリング４とともに図１に示すように組み付けられる
が、その作業手順について図５に基づいて説明すると以
下の通りである。On the other hand, in FIG. 3, the frame 1 is formed by punching and bending from an iron plate, and the side plates 1a opposed to the left and right.
Is bent into a U-shape having
Side plate 1a is the other (same side) side plate 1a.
It has been launched higher than. A bearing hole 5 for supporting the support shaft 3 is provided concentrically on the lower rear side of the left and right side plates 1a of the frame 1. The width of the bearing hole 5 is the thickness between the flat surfaces 3a of the support shaft 3. The side plate 1a is opened to the rear end face through a horizontal slit 6 slightly wider than t. The trip crossbar 2 is assembled to the frame 1 together with the return spring 4 as shown in FIG. 1, and the operation procedure will be described below with reference to FIG.
【０００８】捩じりばねからなる復帰スプリング４は図
２（Ｂ）に示すように、予め支軸３の一方の付け根側の
ボス部に嵌め込み、その一方の脚を背面側のばね受け溝
２ａに嵌入させてトリップクロスバー２に装着してお
く。図５において、このトリップクロスバー２をまず
（Ａ）に示すように水平にして、フレーム１に底面側か
ら矢印方向に接近させる。そして、復帰スプリング４の
他方の脚がフレーム１の底面に突き当たったら、これを
弾性変形させながらなおもトリップクロスバー２を上昇
させ、（Ｂ）に示すように支軸３をスリット６と相対さ
せる。この状態で支軸３の平坦面３ａとスリット６とは
平行である。As shown in FIG. 2B, a return spring 4 composed of a torsion spring is previously fitted into a boss on one base side of the support shaft 3, and one leg thereof is attached to a spring receiving groove 2a on the rear side. And mounted on the trip crossbar 2. In FIG. 5, the trip crossbar 2 is first made horizontal as shown in FIG. 5A, and is approached to the frame 1 from the bottom side in the direction of the arrow. Then, when the other leg of the return spring 4 abuts against the bottom surface of the frame 1, the trip crossbar 2 is still raised while elastically deforming the same, and the support shaft 3 is opposed to the slit 6 as shown in FIG. . In this state, the flat surface 3a of the support shaft 3 and the slit 6 are parallel.
【０００９】次いで、復帰スプリング４を更に変形させ
ながら平坦面３ａでスリット６を矢印方向に潜らせて、
（Ｃ）に示すように支軸３を軸受穴５に挿入する。その
後、トリップクロスバー２を矢印方向に９０度回転さ
せ、平坦面３ａをスリット６に直交させれば、トリップ
クロスバー２はフレーム１の背面に当接して停止し図１
の組み付け状態となる。この状態で、支軸３は軸受穴５
から抜けなくなり、かつトリップクロスバー２は復帰ス
プリング４でフレーム１に押し付けられて直立状態に保
持される。図４は図１における軸受穴５部分の拡大図
で、軸受穴５のスリット６と反対側の部分には空間５ａ
ができ、この空間にグリースが保持される。Next, while further deforming the return spring 4, the slit 6 is sunk in the direction of the arrow on the flat surface 3a,
The support shaft 3 is inserted into the bearing hole 5 as shown in FIG. Thereafter, when the trip crossbar 2 is rotated 90 degrees in the direction of the arrow and the flat surface 3a is perpendicular to the slit 6, the trip crossbar 2 comes into contact with the rear surface of the frame 1 and stops.
Is assembled. In this state, the support shaft 3 has the bearing hole 5
And the trip crossbar 2 is pressed against the frame 1 by the return spring 4 and held upright. FIG. 4 is an enlarged view of the bearing hole 5 in FIG. 1, and a space 5 a is provided in a portion of the bearing hole 5 opposite to the slit 6.
Grease is retained in this space.
【００１０】図１の開閉機構において、フレーム１には
操作ハンドル７が回動自在に支持され、この操作ハンド
ル７はハンドルスプリング８により図の時計方向に付勢
されている。操作ハンドル７には両端がコ字形に折り曲
げられた丸棒材からなるリンク９の上端が連結され、リ
ンク９の下端はフレーム１の円弧状の長穴１０に挿入さ
れている。また、このリンク９の他端には鉄板からなる
へ字形の爪１１がこれに一体に折り曲げ形成された耳辺
を介して連結されている。一方、フレーム１が固定され
た図示しないケースには固定接点１２ａを有する固定接
点台１２と、可動接点１３ａを有する可動板ばね１３が
固定され、詳細には図示しないが爪１１と可動板ばね１
３との間には上下に昇降自在な開閉板１４が設けられて
いる。In the opening / closing mechanism shown in FIG. 1, an operation handle 7 is rotatably supported on the frame 1, and the operation handle 7 is urged clockwise in FIG. An upper end of a link 9 made of a round bar material whose both ends are bent into a U-shape is connected to the operation handle 7, and a lower end of the link 9 is inserted into an arc-shaped long hole 10 of the frame 1. The other end of the link 9 is connected to an elliptical claw 11 made of an iron plate via an edge which is integrally formed with the hook. On the other hand, a fixed contact base 12 having a fixed contact 12a and a movable leaf spring 13 having a movable contact 13a are fixed to a case (not shown) to which the frame 1 is fixed.
An opening / closing plate 14 which can be moved up and down is provided between the opening and closing plate 3.
【００１１】そこで、図１のＯＦＦ状態から操作ハンド
ル７を反時計方向に回動操作すると、リンク９の下端は
長穴１０に案内されて下方に移動し、同時に爪１１が押
し下げられる。この爪１１は下降の途中で図の右端がト
リップクロスバー２の凸部２ｂに突き当たって係止され
るが、なおも押し下げられると凸部２ｂを支点に反時計
方向に回動し、その左端で開閉板１４を押し下げて、こ
れに接する可動板ばね１３を弾性変形させる。これによ
り、可動接点１３ａが固定接点１２ａに接触して、回路
遮断器はＯＮする。すでに述べたように操作ハンドル７
はハンドルスプリング８から時計方向（ＯＦＦ方向）の
力を受けているが、この状態では操作ハンドル７とリン
ク９とで構成されるトグルリンク機構は逆く字状に反転
しているため、ハンドルスプリング８からの力は爪１１
を押し下げる向きに作用してＯＮ状態を継続させる。When the operating handle 7 is rotated counterclockwise from the OFF state in FIG. 1, the lower end of the link 9 is guided by the elongated hole 10 and moves downward, and at the same time, the claw 11 is pushed down. While the claw 11 is being lowered, the right end of the drawing abuts on the protrusion 2b of the trip crossbar 2 and is locked. To push down the opening / closing plate 14 to elastically deform the movable leaf spring 13 in contact therewith. As a result, the movable contact 13a comes into contact with the fixed contact 12a, and the circuit breaker is turned on. As described above, the operation handle 7
Receives a force in the clockwise direction (OFF direction) from the handle spring 8, but in this state, the toggle link mechanism formed by the operation handle 7 and the link 9 is inverted in an inverted letter shape. Power from 8 is claw 11
Acts in the direction of pushing down to keep the ON state.
【００１２】上記ＯＮ状態から操作ハンドル７をＯＦＦ
方向に回動操作すると、上記トグルリンク機構が図１の
状態に反転した時点で爪１１が引き上げられ、回路遮断
器はＯＦＦする。また、ＯＮ状態において、過電流状態
の発生により図示しないトリップクロスバー２が過電流
引外し装置からの力を受けて時計方向に回動させられる
と、凸部２ｂによる爪１１の係止が外される結果、上記
トグルリンク機構の反転が生じ、爪１１はハンドルスプ
リング８の作用で引き上げられて回路遮断器はＯＦＦす
る（トリップ動作）。The operation handle 7 is turned off from the above ON state.
When the turning operation is performed in the direction, the claw 11 is pulled up when the toggle link mechanism is reversed to the state shown in FIG. 1, and the circuit breaker is turned off. Further, in the ON state, when the trip crossbar 2 (not shown) is rotated clockwise by receiving the force from the overcurrent tripping device due to the occurrence of the overcurrent state, the locking of the claw 11 by the projection 2b is released. As a result, the toggle link mechanism is inverted, the claw 11 is pulled up by the action of the handle spring 8, and the circuit breaker is turned off (trip operation).
【００１３】[0013]
【発明の効果】以上述べた通り、この発明によれば、ト
リップクロスバーの支軸の平坦面の向きをフレームのス
リットに合わせ、平坦面でスリットを潜らせて支軸を軸
受穴に挿入するだけでトリップクロスバーをフレームに
組み付けられるので、別部品の支軸をフレームとトリッ
プクロスバーとに挿通する構成に比べて部品点数が減る
とともに、トリップクロスバーの組み付け作業がきわめ
て簡単となる。また、支軸の平坦面と軸受穴の周縁との
間の空間ができるので、この空間をグリース溜めとして
グリースを良好に保持させ、回路遮断器の引外し特性を
長期に安定させることができる。As described above, according to the present invention, the flat surface of the spindle of the trip crossbar is aligned with the slit of the frame, and the slit is sunk on the flat surface to insert the spindle into the bearing hole. Since the trip crossbar can be assembled to the frame only by itself, the number of components is reduced as compared with a configuration in which a support shaft of another part is inserted through the frame and the trip crossbar, and the operation of assembling the trip crossbar becomes extremely simple. In addition, since a space is formed between the flat surface of the support shaft and the peripheral edge of the bearing hole, the space can be used as a grease reservoir to hold the grease satisfactorily and stabilize the tripping characteristics of the circuit breaker for a long time.
【図１】この発明の実施例を示す開閉機構の側面図であ
る。FIG. 1 is a side view of an opening / closing mechanism according to an embodiment of the present invention.
【図２】図１におけるトリップクロスバーを示し、
（Ａ）は背面図、（Ｂ）はその側面図である。FIG. 2 shows a trip crossbar in FIG. 1;
(A) is a rear view and (B) is a side view thereof.
【図３】図１におけるフレームを示し、（Ａ）は側面
図、（Ｂ）はその背面図である。3A and 3B show a frame in FIG. 1, wherein FIG. 3A is a side view and FIG. 3B is a rear view thereof.
【図４】図１の要部拡大図である。FIG. 4 is an enlarged view of a main part of FIG. 1;
【図５】（Ａ）〜（Ｃ）は図２のトリップクロスバーを
図３のフレームに組み付ける手順を示す順次示す側面図
である。5A to 5C are side views sequentially showing a procedure for assembling the trip crossbar of FIG. 2 to the frame of FIG. 3;
【図６】従来例を示す開閉機構の側面図である。FIG. 6 is a side view of an opening / closing mechanism showing a conventional example.
１ フレーム １ａ 側板 ２ トリップクロスバー ３ 支軸 ３ａ 平坦面 ５ 軸受穴 ６ スリット ７ 操作ハンドル Reference Signs List 1 frame 1a side plate 2 trip crossbar 3 support shaft 3a flat surface 5 bearing hole 6 slit 7 operation handle
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭63−271841（ＪＰ，Ａ) 特開 平３−280320（ＪＰ，Ａ) 特開 平５−109354（ＪＰ，Ａ) 特開 平４−341722（ＪＰ，Ａ) 特開 平３−250521（ＪＰ，Ａ) 特開 平３−11517（ＪＰ，Ａ) 実開 平３−53734（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) H01H 71/10 H01H 73/36 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-271841 (JP, A) JP-A-3-280320 (JP, A) JP-A-5-109354 (JP, A) JP-A-4- 341722 (JP, A) JP-A-3-250521 (JP, A) JP-A-3-11517 (JP, A) JP-A-3-53734 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) H01H 71/10 H01H 73/36
Claims (1)
相対する側板間にトリップクロスバーが支軸により回動
自在に支持される回路遮断器の開閉機構において、 トリップクロスバーの両側に外周上の相対する２箇所を
互いに平行な平坦面とした支軸を一体に突出形成すると
ともに、前記支軸を支承するフレームの側板の軸受穴を
幅が前記平坦面間の厚みより僅かに広いスリットを介し
て前記側板の端面に開口させたことを特徴とする回路遮
断器の開閉機構。An open / close mechanism for a circuit breaker in which a trip crossbar is rotatably supported by a support shaft between opposing side plates of a frame bent and formed in a U-shape. A support shaft having two opposing flat surfaces parallel to each other is integrally formed so as to protrude, and a bearing hole of a side plate of a frame supporting the support shaft is formed through a slit having a width slightly larger than the thickness between the flat surfaces. An opening / closing mechanism for a circuit breaker, wherein the opening / closing mechanism is opened at an end face of the side plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20804794A JP3344520B2 (en) | 1994-08-09 | 1994-08-09 | Circuit breaker switching mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20804794A JP3344520B2 (en) | 1994-08-09 | 1994-08-09 | Circuit breaker switching mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0850844A JPH0850844A (en) | 1996-02-20 |
| JP3344520B2 true JP3344520B2 (en) | 2002-11-11 |
Family
ID=16549770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20804794A Expired - Fee Related JP3344520B2 (en) | 1994-08-09 | 1994-08-09 | Circuit breaker switching mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3344520B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4607306B2 (en) * | 2000-09-28 | 2011-01-05 | テンパール工業株式会社 | Circuit breaker |
| JP5217019B2 (en) * | 2008-04-17 | 2013-06-19 | テンパール工業株式会社 | Circuit breaker switching mechanism |
| JP5217020B2 (en) * | 2008-04-17 | 2013-06-19 | テンパール工業株式会社 | Circuit breaker switching mechanism |
-
1994
- 1994-08-09 JP JP20804794A patent/JP3344520B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0850844A (en) | 1996-02-20 |
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