JP6030934B2 - Electromagnetic trip device - Google Patents

Electromagnetic trip device Download PDF

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JP6030934B2
JP6030934B2 JP2012260842A JP2012260842A JP6030934B2 JP 6030934 B2 JP6030934 B2 JP 6030934B2 JP 2012260842 A JP2012260842 A JP 2012260842A JP 2012260842 A JP2012260842 A JP 2012260842A JP 6030934 B2 JP6030934 B2 JP 6030934B2
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伊藤　裕史
裕史 伊藤
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河村電器産業株式会社
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本発明は、電路に短絡電流が流れたときに接点開閉機構を開放動作させる電磁引外し装置に関する。   The present invention relates to an electromagnetic trip device that opens a contact switching mechanism when a short-circuit current flows through an electric circuit.

従来、回路遮断器において、固定電磁片と可動電磁を備えた電磁引外し装置が知られている。例えば、特許文献１には、図４に示すように、固定電磁片５１に蝶番片５２を介して可動電磁片５３を回動可能に取り付け、電路導体５４に短絡電流が流れたときに、固定電磁片５１により可動電磁片５３を吸引し、可動電磁片５３によって掛合片５５を駆動し、掛合片５５で接点開閉機構（図示略）を開放動作させて、電路を遮断する技術が記載されている。   Conventionally, in a circuit breaker, an electromagnetic trip device having a fixed electromagnetic piece and a movable electromagnetic is known. For example, in Patent Document 1, as shown in FIG. 4, a movable electromagnetic piece 53 is rotatably attached to a fixed electromagnetic piece 51 via a hinge piece 52, and is fixed when a short-circuit current flows through the electric conductor 54. A technique is described in which the movable electromagnetic piece 53 is attracted by the electromagnetic piece 51, the engaging piece 55 is driven by the movable electromagnetic piece 53, and the contact opening / closing mechanism (not shown) is opened by the engaging piece 55 to cut off the electric circuit. Yes.

特開２０１０−２６２７８２号公報JP 2010-262882 A

ところが、従来の電磁引外し装置によると、電路の遮断により固定電磁片５１が消磁したときに、可動電磁片５３を待機位置に戻すための復帰バネ５６を蝶番片５２に設ける必要があった。また、復帰バネ５６は待機位置の可動電磁片５３の動きを許容するため、通電により励磁状態にある固定電磁片５１の振動が蝶番片５２を介して可動電磁片５３に伝わり、可動電磁片５３がうなり音を発生するという問題点もあった。   However, according to the conventional electromagnetic trip device, it is necessary to provide the hinge piece 52 with a return spring 56 for returning the movable electromagnetic piece 53 to the standby position when the fixed electromagnetic piece 51 is demagnetized by interruption of the electric circuit. Further, since the return spring 56 allows the movement of the movable electromagnetic piece 53 at the standby position, the vibration of the fixed electromagnetic piece 51 in the excited state is transmitted to the movable electromagnetic piece 53 through the hinge piece 52 by energization, and the movable electromagnetic piece 53 There was also the problem of generating a roaring sound.

そこで、本発明の目的は、可動電磁片から専用の復帰バネを省略し、部品点数を削減できるとともに、可動電磁片のうなり音を防止できる電磁引外し装置を提供することにある。   Therefore, an object of the present invention is to provide an electromagnetic trip device that can reduce the number of parts by omitting a dedicated return spring from the movable electromagnetic piece and can also prevent beat noise of the movable electromagnetic piece.

上記課題を解決するために、本発明の電磁引外し装置は、電路に流れる電流によって磁化される固定電磁片と、短絡電流が流れたときに固定電磁片に吸引される可動電磁片と、可動電磁片に連動して接点開閉機構を開放動作させる合成樹脂製の掛合片とを備え、掛合片に可動電磁片を一体移動可能に取り付けて成り、可動電磁片を固定電磁片から離れた待機位置に向けて付勢するバネ部材を、掛合片の長手方向中間部に設けた支点軸の周りに設け、掛合片は支点軸に回動可能に支持されて、掛合片の一端側に可動電磁片を取り付けると共に、掛合片の他端側に接点開閉機構に係合するカム部を形成したことを特徴とする。 In order to solve the above problems, an electromagnetic trip device of the present invention includes a fixed electromagnetic piece that is magnetized by a current flowing in an electric circuit, a movable electromagnetic piece that is attracted to the fixed electromagnetic piece when a short-circuit current flows, and a movable A synthetic resin hooking piece that opens the contact opening and closing mechanism in conjunction with the electromagnetic piece, and is constructed by attaching the movable electromagnetic piece to the hooking piece so that the movable electromagnetic piece can be moved integrally. A spring member that is biased toward the fulcrum is provided around a fulcrum shaft provided in the middle in the longitudinal direction of the engagement piece. The engagement piece is rotatably supported by the fulcrum shaft, and a movable electromagnetic piece And a cam portion that engages with the contact opening / closing mechanism is formed on the other end side of the engaging piece .

本発明の電磁引外し装置によれば、可動電磁片を掛合片に取り付け、掛合片に設けたバネ部材で可動電磁片を待機位置に向けて付勢するので、可動電磁片から専用の復帰バネを省いて、部品点数を削減できるとともに、可動電磁片のうなり音を防止できるという効果がある。   According to the electromagnetic trip device of the present invention, the movable electromagnetic piece is attached to the engagement piece, and the movable electromagnetic piece is biased toward the standby position by the spring member provided on the engagement piece. The number of parts can be reduced and the noise of the movable electromagnetic piece can be prevented.

本発明の一実施形態を示す電磁引外し装置の斜視図である。It is a perspective view of an electromagnetic trip device showing one embodiment of the present invention. 電路に正常値の電流が流れているときの電磁引外し装置の動作を示す機構図である。It is a mechanism figure which shows operation | movement of the electromagnetic trip device when the electric current of normal value is flowing through the electric circuit. 電路に短絡電流が流れたときの電磁引外し装置の動作を示す機構図である。It is a mechanism figure which shows operation | movement of an electromagnetic trip apparatus when a short circuit current flows into the electric circuit. 従来の電磁引外し装置を示す機構図である。It is a mechanism figure which shows the conventional electromagnetic trip apparatus.

以下、本発明の実施形態を図面に基づいて説明する。図１、図２に示すように、回路遮断器のケーシング１には電路を形成する導体２が内装され、導体２上に電磁引外し装置３が設置されている。電磁引外し装置３は、導体２に流れる電流で磁化される固定電磁片４と、短絡電流が流れたときに固定電磁片４に吸引される可動電磁片５と、可動電磁片５に連動して接点開閉機構６（一部のみを図示）を開放動作させる掛合片７とを備えている。接点開閉機構６としては、ハンドルと連携して接点を開閉する従来周知の各種機構を使用できる。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, a circuit breaker casing 1 is provided with a conductor 2 forming an electric circuit, and an electromagnetic trip device 3 is installed on the conductor 2. The electromagnetic trip device 3 is linked to the fixed electromagnetic piece 4 that is magnetized by the current flowing through the conductor 2, the movable electromagnetic piece 5 that is attracted to the fixed electromagnetic piece 4 when a short-circuit current flows, and the movable electromagnetic piece 5. And an engagement piece 7 for opening the contact opening / closing mechanism 6 (only a part of which is shown). As the contact opening / closing mechanism 6, various conventionally known mechanisms for opening and closing the contact in cooperation with the handle can be used.

固定電磁片４は、磁性板を平面コ字形に折り曲げて形成され、内側に導体２が挿通され、可動電磁片５と対向する端面に斜状の吸着部９が設けられている。掛合片７は、合成樹脂材料で成形され、長手方向中間部の支点軸１０によりフレーム１１に回動可能に支持されている。可動電磁片５は、磁性板により四角形に形成され、熱カシメ１２により掛合片７の下端部に一体回動可能に取り付けられ、固定電磁片４から離れた待機位置（図２参照）と固定電磁片４に吸着された作用位置（図３参照）とに配置される。   The fixed electromagnetic piece 4 is formed by bending a magnetic plate into a planar U-shape, the conductor 2 is inserted inside, and an inclined attracting portion 9 is provided on an end surface facing the movable electromagnetic piece 5. The engaging piece 7 is formed of a synthetic resin material and is rotatably supported on the frame 11 by a fulcrum shaft 10 in the middle portion in the longitudinal direction. The movable electromagnetic piece 5 is formed in a quadrangular shape by a magnetic plate, and is attached to the lower end portion of the engagement piece 7 by heat caulking 12 so as to be integrally rotatable. The standby position away from the fixed electromagnetic piece 4 (see FIG. 2) and the fixed electromagnetic It arrange | positions in the action position (refer FIG. 3) adsorbed by the piece 4. FIG.

支点軸１０の周りにはねじりバネ１３が設けられ、その一端がフレーム１１に掛止され、他端が掛合片７に係着され、ねじりバネ１３の弾発力で可動電磁片５が待機位置に向けて付勢されている。掛合片７の上端には頭部１４が設けられ、頭部１４と支点軸１０との間に接点開閉機構６と係合するカム部１５が突設されている。なお、この実施形態の電磁引外し装置３は、頭部１４にバイメタル片１６が当接する当接部１７を備え、電路に過電流が流れたときに、バイメタル片１６で掛合片７を回動し、接点開閉機構６を開放動作させるようになっている。   A torsion spring 13 is provided around the fulcrum shaft 10, one end of which is engaged with the frame 11, and the other end is engaged with the engagement piece 7, and the movable electromagnetic piece 5 is moved to the standby position by the elastic force of the torsion spring 13. It is energized towards. A head portion 14 is provided at the upper end of the engagement piece 7, and a cam portion 15 that engages with the contact opening / closing mechanism 6 protrudes between the head portion 14 and the fulcrum shaft 10. The electromagnetic trip device 3 of this embodiment includes a contact portion 17 with which the bimetal piece 16 comes into contact with the head 14, and rotates the engaging piece 7 with the bimetal piece 16 when an overcurrent flows in the electric circuit. Then, the contact opening / closing mechanism 6 is opened.

上記構成の電磁引外し装置３において、導体２に正常値の電流が流れているときには、図２に示すように、可動電磁片５が待機位置に配置され、掛合片７の頭部１４がフレーム１１のストッパ１８に当接し、掛合片７のカム部１５が接点開閉機構６に係合し、回路遮断器の接点（図示略）が閉じた状態に保持されている。この状態で、導体２に短絡電流が流れると、図３に示すように、可動電磁片５が固定電磁片４に吸引され、カム部１５が接点開閉機構６から解離され、接点開閉機構６が接点を開いて電路を遮断する。   In the electromagnetic trip device 3 configured as described above, when a current of normal value flows through the conductor 2, as shown in FIG. 2, the movable electromagnetic piece 5 is disposed at the standby position, and the head 14 of the engagement piece 7 is attached to the frame. 11, the cam portion 15 of the engagement piece 7 is engaged with the contact opening / closing mechanism 6, and the contact (not shown) of the circuit breaker is held in a closed state. In this state, when a short-circuit current flows through the conductor 2, as shown in FIG. 3, the movable electromagnetic piece 5 is attracted to the fixed electromagnetic piece 4, the cam portion 15 is dissociated from the contact opening / closing mechanism 6, and the contact opening / closing mechanism 6 is Open the contact to cut off the electrical circuit.

電路が遮断されると、固定電磁片４が消磁し、可動電磁片５がねじりバネ１３によって待機位置に復帰する（図２参照）。このとき、可動電磁片５を掛合片７と兼用のバネ１３で復帰させるので、専用の復帰バネを省いて、部品点数を削減できる。また、待機位置では、可動電磁片５が固定電磁片４から離れ、掛合片７がねじりバネ１３でストッパ１８に押し付けられた状態で静止しているため、固定電磁片４から掛合片７への振動伝播を遮断して、うなり音を防止できる。そのうえ、可動電磁片５、支点軸１０、ねじりバネ１３およびカム部１５を掛合片７の長手方向に配列したので、電磁引外し装置３の全体をコンパクトに構成し、遮断器ケース１の限られたスペースに容易に設置できるという利点もある。   When the electric path is interrupted, the fixed electromagnetic piece 4 is demagnetized, and the movable electromagnetic piece 5 is returned to the standby position by the torsion spring 13 (see FIG. 2). At this time, since the movable electromagnetic piece 5 is returned by the spring 13 which is also used as the engaging piece 7, the number of parts can be reduced by omitting a dedicated return spring. At the standby position, the movable electromagnetic piece 5 is separated from the fixed electromagnetic piece 4 and the engaging piece 7 is stationary while being pressed against the stopper 18 by the torsion spring 13. It can block the vibration propagation and prevent the roaring sound. In addition, since the movable electromagnetic piece 5, the fulcrum shaft 10, the torsion spring 13 and the cam portion 15 are arranged in the longitudinal direction of the engaging piece 7, the entire electromagnetic trip device 3 is configured in a compact manner, and the circuit breaker case 1 is limited. There is also an advantage that it can be easily installed in a space.

なお、図１に一基の電磁引外し装置３を示したが、回路遮断器の極数に応じて、二基または３基の引外し装置３を遮断器ケースの内部に並設することができる。その他、本発明の電磁引外し装置は、上記実施形態に限定されるものではなく、例えば、バイメタル片１６を装備しない回路遮断器に適用したり、ねじりバネ１３に代えて板バネを使用したりするなど、発明の趣旨を逸脱しない範囲で、各部の構成や形状を適宜に変更して実施することも可能である。   Although one electromagnetic trip device 3 is shown in FIG. 1, two or three trip devices 3 may be arranged in parallel in the circuit breaker case according to the number of poles of the circuit breaker. it can. In addition, the electromagnetic trip device of the present invention is not limited to the above-described embodiment. For example, the electromagnetic trip device can be applied to a circuit breaker not equipped with the bimetal piece 16 or a leaf spring can be used instead of the torsion spring 13. For example, the configuration and shape of each part can be changed as appropriate without departing from the spirit of the invention.

１ 遮断器ケース
２ 導体
３ 電磁引外し装置
４ 固定電磁片
５ 可動電磁片
６ 接点開閉機構
７ 掛合片
１３ ねじりバネ
１５ カム部 DESCRIPTION OF SYMBOLS 1 Circuit breaker case 2 Conductor 3 Electromagnetic trip device 4 Fixed electromagnetic piece 5 Movable electromagnetic piece 6 Contact opening / closing mechanism 7 Engagement piece 13 Torsion spring 15 Cam part

Claims (1)

電路に流れる電流によって磁化される固定電磁片と、短絡電流が流れたときに前記固定電磁片に吸引される可動電磁片と、前記可動電磁片に連動して接点開閉機構を開放動作させる合成樹脂製の掛合片とを備え、前記掛合片に前記可動電磁片を一体移動可能に取り付けて成り、
前記可動電磁片を前記固定電磁片から離れた待機位置に向けて付勢するバネ部材を、前記掛合片の長手方向中間部に設けた支点軸の周りに設け、
前記掛合片は前記支点軸に回動可能に支持されて、前記掛合片の一端側に前記可動電磁片を取り付けると共に、前記掛合片の他端側に前記接点開閉機構に係合するカム部を形成したことを特徴とする電磁引外し装置。 A fixed magnetic piece which is magnetized by the current flowing through the path, the movable electromagnetic piece is attracted to the fixed magnetic piece, synthetic resin for opening operation of the contact switch mechanism in association with the movable magnetic piece when the short-circuit current flows and a manufacturing of the lock plate comprises attached so as to be integrally moving the movable electromagnetic piece to said lock plate,
A spring member for biasing the movable magnetic piece in a standby position away from the fixed magnetic piece, provided around the fulcrum shaft provided on the longitudinally intermediate portion of the lock plate,
The engaging piece is rotatably supported by the fulcrum shaft, and the movable electromagnetic piece is attached to one end side of the engaging piece, and a cam portion engaging the contact opening / closing mechanism is provided on the other end side of the engaging piece. An electromagnetic trip device characterized by being formed .
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Publication number Priority date Publication date Assignee Title
US10672579B2 (en) 2017-03-09 2020-06-02 Lsis Co., Ltd. Circuit breaker with instant trip mechanism

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US10566160B2 (en) 2015-05-18 2020-02-18 Gigavac, Llc Passive triggering mechanisms for use with switching devices incorporating pyrotechnic features
US9887055B2 (en) * 2015-05-18 2018-02-06 Gigavac, Llc Mechanical fuse device
US11239038B2 (en) 2015-05-18 2022-02-01 Gigavac, Llc Mechanical fuse device
US11443910B2 (en) 2019-09-27 2022-09-13 Gigavac, Llc Contact levitation triggering mechanisms for use with switching devices incorporating pyrotechnic features

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DE549860C (en) * 1931-03-15 1932-05-02 Bing Werke Vorm Gebr Bing Akt Switch designed as electromagnetic short-circuit protection, especially for small transformers
US3646488A (en) * 1969-11-05 1972-02-29 Tokyo Shibaura Electric Co Electric circuit breaker
JPS6386331A (en) * 1986-09-30 1988-04-16 東芝ライテック株式会社 Circuit breaker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10672579B2 (en) 2017-03-09 2020-06-02 Lsis Co., Ltd. Circuit breaker with instant trip mechanism

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