JP5170657B2 - Overcurrent trip mechanism - Google Patents

Overcurrent trip mechanism Download PDF

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JP5170657B2
JP5170657B2 JP2008097009A JP2008097009A JP5170657B2 JP 5170657 B2 JP5170657 B2 JP 5170657B2 JP 2008097009 A JP2008097009 A JP 2008097009A JP 2008097009 A JP2008097009 A JP 2008097009A JP 5170657 B2 JP5170657 B2 JP 5170657B2
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bimetal
terminal
tripping mechanism
overcurrent tripping
overcurrent
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JP2009252439A (en
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啓太 清水
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河村電器産業株式会社
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Description

本発明は、回路遮断器における過電流引き外し機構に関するものである。   The present invention relates to an overcurrent tripping mechanism in a circuit breaker.

従来、過電流引外し機構を用いた回路遮断器には特許文献１に記載されているような、主回路に過電流、短絡、漏電等の異常が発生した場合はバイメタルと掛合片とからなる引き外し機構が駆動して開閉機構部による可動接触子への押圧を解除し、バネにより固定接触子から可動接触子を開離させて主回路が遮断するようになっている回路遮断器があった。   Conventionally, a circuit breaker using an overcurrent tripping mechanism is composed of a bimetal and a latch piece when an abnormality such as an overcurrent, a short circuit, or a leakage occurs in a main circuit as described in Patent Document 1. There is a circuit breaker in which the tripping mechanism is driven to release the pressing of the movable contact by the open / close mechanism and the main circuit is shut off by separating the movable contact from the fixed contact by a spring. It was.

又、過電流引き外し機構を用いた回路遮断器には特許文献２に記載されているような、器体の内部に、ラッチ部材との係止が解除されると通常時に蓄積した力によって接点部を強制開極させる掛合片と、一端側を固定端とするとともに他端側を自由端とし、通電電路に過電流が流れたときに自由端が掛合片を係止解除方向に押圧駆動するバイメタルと、バイメタルと掛合片との相対的な位置関係を変化させる調整螺子と、調整螺子が螺合するねじ孔が貫設されたナット部材とを収納した回路遮断器があった。
特開２００４−５５１７３ 特開２００８−３４３１３ Also, circuit breakers using an overcurrent tripping mechanism have contact points with the force accumulated during normal operation when the latch with the latch member is released, as described in Patent Document 2, as described in Patent Document 2. The engaging piece for forcibly opening the contact portion and one end side as a fixed end and the other end side as a free end, and when the overcurrent flows through the energizing circuit, the free end pushes the engaging piece in the unlocking direction. There has been a circuit breaker that houses a bimetal, an adjustment screw that changes the relative positional relationship between the bimetal and the engagement piece, and a nut member through which a screw hole into which the adjustment screw is screwed.
JP 2004-55173 A JP2008-34313

しかしながら、特許文献１に記載の発明では、接続端子に設置された引き締めネジによる締め付けによって、バイメタルが回動し、これによって、引き外し部材とバイメタルとの距離に違いが生じ、電路が遮断されるまでの時間が一定ではなくなるという欠点がある。又、バイメタルの回動が過度である場合は通電してから、すぐに電路が遮断される恐れがあるという欠点がある。   However, in the invention described in Patent Document 1, the bimetal is rotated by tightening with the tightening screw installed in the connection terminal, and thereby the distance between the tripping member and the bimetal is different, and the electric circuit is interrupted. There is a disadvantage that the time until is not constant. In addition, when the bimetal is excessively rotated, there is a drawback that the electric circuit may be interrupted immediately after energization.

又、特許文献２に記載の発明では、引き締めネジによる締め付けが可撓電線を伝ってバイメタルに影響し、バイメタルも回動させる。これによって、回路遮断器によって引き外し部材とバイメタルとの距離に違いが生じ、電路が遮断されるまでの時間が一定ではなくなるという欠点がある。又、バイメタルの回動が過度である場合は通電してから、すぐに電路が遮断される恐れがあるという欠点がある。   Further, in the invention described in Patent Document 2, tightening with a tightening screw travels through the flexible wire to affect the bimetal, and the bimetal is also rotated. As a result, the circuit breaker causes a difference in the distance between the tripping member and the bimetal, and there is a disadvantage that the time until the electric circuit is cut off is not constant. In addition, when the bimetal is excessively rotated, there is a drawback that the electric circuit may be interrupted immediately after energization.

このため、本発明によって解決しようとする課題は、負荷側の端子を締め付けた際の回動によってバイメタルまでも回動することを防ぎ、電路が遮断されるまでの所要時間を一定に得られる過電流引外し機構を提供することにある。   For this reason, the problem to be solved by the present invention is to prevent the bimetal from rotating by the rotation when the load side terminal is tightened, and to obtain a constant time required until the electric circuit is interrupted. The object is to provide a current trip mechanism.

上記した課題を解決するためになされた本発明の過電流引外し機構は、回路遮断器のケース内部に設けられる過電流引き外し機構であって、この過電流引き外し機構は挿入された電線を端子ネジによって固定する端子と、端子に設置される接続座に一端を固定されるバイメタルと、バイメタルによって押圧駆動する掛合片と、掛合片とバイメタルとの間に設けられると共に端子ネジの締め付けによるバイメタルの過度な回動を抑制するガイド部を設けたものである。 The overcurrent tripping mechanism of the present invention made to solve the above-described problem is an overcurrent tripping mechanism provided inside a case of a circuit breaker, and the overcurrent tripping mechanism is configured to remove an inserted electric wire. A terminal fixed by a terminal screw , a bimetal whose one end is fixed to a connection seat installed on the terminal, a hook piece that is pressed and driven by the bimetal, and a bimetal that is provided between the hook piece and the bimetal and is tightened by the terminal screw The guide part which suppresses excessive rotation of this is provided.

本発明の過電流引外し機構によれば、ガイド部を設けることで端子ネジを締め付けた際であっても、締め付けによる回動によってバイメタルまでもが回動することを防ぎ、バイメタルの回動によって掛合片とバイメタルとの距離に回路遮断器によって違いが生じることを防ぐことが可能である。これにより、電路を遮断するまでの時間を一定に得ることが可能である。   According to the overcurrent tripping mechanism of the present invention, even when the terminal screw is tightened by providing the guide portion, it is possible to prevent the bimetal from rotating due to the rotation due to the tightening, and by the rotation of the bimetal. It is possible to prevent the circuit breaker from causing a difference in the distance between the engagement piece and the bimetal. Thereby, it is possible to obtain a constant time until the electric circuit is cut off.

本発明では、電路の遮断までの時間を一定に得られる構造を少ない部品数で可能にした。   In the present invention, a structure that can obtain a constant time until interruption of the electric circuit can be obtained with a small number of parts.

以下、本発明の実施の形態を説明する。
回路遮断器のケース内部に設けられる過電流引き外し機構であって、過電流引き外し機構は挿入された電線を固定する端子と、端子に設置される接続座に一端を固定されるバイメタルと、バイメタルによって押圧駆動する掛合片と、掛合片とバイメタルとの間に設けられると共にバイメタルの動きを抑制するコ字状に形成したコ字ガイド部を設けた。これにより、端子ネジを締め付けた場合であっても端子の回動によるバイメタルの回動を防ぐことが可能となり、バイメタルと掛合片との間の距離に回路遮断器によって違いが生じることを防ぐことが可能であるため、電路を遮断するまでの時間を一定に得ることが可能である。 Embodiments of the present invention will be described below.
An overcurrent tripping mechanism provided inside the case of the circuit breaker, wherein the overcurrent tripping mechanism has a terminal for fixing the inserted electric wire, a bimetal having one end fixed to a connection seat installed on the terminal, An engagement piece that is pressed and driven by the bimetal, and a U-shaped guide portion that is provided between the engagement piece and the bimetal and that is formed in a U shape that suppresses the movement of the bimetal. This makes it possible to prevent the bimetal from rotating due to the rotation of the terminal even when the terminal screw is tightened, and to prevent the circuit breaker from making a difference in the distance between the bimetal and the engagement piece. Therefore, it is possible to obtain a constant time until the electric circuit is cut off.

回路遮断器のケース内部に設けられる過電流引き外し機構であって、過電流引き外し機構は挿入された電線を固定する端子と、端子に設置される接続座に一端を固定されるバイメタルと、バイメタルによって押圧駆動する掛合片と、掛合片とバイメタルとの間に設けられると共にバイメタルの動きを抑制するＬ字状に形成したＬ字ガイド部を設けた。又、Ｌ字ガイド部は端子ネジの締め付け方向に壁が来るように設置する。これにより、端子ネジを締め付けた場合であっても端子の回動によるバイメタルの回動を防ぐことが可能となり、バイメタルと掛合片との間の距離に回路遮断器によって違いが生じることを防ぐことが可能であるため、電路を遮断するまでの時間を一定に得ることが可能である。   An overcurrent tripping mechanism provided inside the case of the circuit breaker, wherein the overcurrent tripping mechanism has a terminal for fixing the inserted electric wire, a bimetal having one end fixed to a connection seat installed on the terminal, An engagement piece that is pressed and driven by the bimetal, and an L-shaped guide portion that is provided between the engagement piece and the bimetal and that is formed in an L shape that suppresses the movement of the bimetal are provided. Also, the L-shaped guide part is installed so that the wall comes in the terminal screw tightening direction. This makes it possible to prevent the bimetal from rotating due to the rotation of the terminal even when the terminal screw is tightened, and to prevent the circuit breaker from making a difference in the distance between the bimetal and the engagement piece. Therefore, it is possible to obtain a constant time until the electric circuit is cut off.

以上のように、本発明の過電流引外し機構は、ガイド部を設けたことで、回路遮断器によって掛合片とバイメタルとの距離に違いが生じることを防ぎ、電路が遮断されるまでの時間も一定とすることが可能となるものである。   As described above, the overcurrent tripping mechanism according to the present invention is provided with the guide portion, thereby preventing the circuit breaker from causing a difference in the distance between the engagement piece and the bimetal, and the time until the circuit is interrupted. Can also be kept constant.

本発明の実施例１における、過電流引外し機構の斜視図である。It is a perspective view of an overcurrent tripping mechanism in Example 1 of the present invention. 本発明の実施例２における、過電流引外し機構の斜視図である。It is a perspective view of the overcurrent tripping mechanism in Example 2 of the present invention. 従来技術における、特許文献１に記載の過電流引外し機構の断面図である。It is sectional drawing of the overcurrent trip mechanism of patent document 1 in a prior art. 従来技術における、特許文献２に記載の過電流引外し機構の断面図である。It is sectional drawing of the overcurrent trip mechanism of patent document 2 in a prior art.

符号の説明Explanation of symbols

１、１１、２１、３１ バイメタル
２、１２、２２、３２ 掛合片
３、１３、２３、３３ 端子
４、１４、２４、３４ 端子ネジ
５ コ字ガイド部
１６ Ｌ字ガイド部 1, 11, 21, 31 Bimetal 2, 12, 22, 32 Engagement piece 3, 13, 23, 33 Terminal 4, 14, 24, 34 Terminal screw 5 U-shaped guide part 16 L-shaped guide part

Claims (1)

回路遮断器のケース内部に設けられる過電流引き外し機構であって、該過電流引き外し機構は挿入された電線を端子ネジによって固定する端子と、該端子に設置される接続座に一端を固定されるバイメタルと、該バイメタルによって押圧駆動する掛合片と、該掛合片と前記バイメタルとの間に設けられると共に前記端子ネジの締め付けによる前記バイメタルの過度な回動を抑制するガイド部を設けたことを特徴とする過電流引き外し機構。 An overcurrent tripping mechanism provided inside the case of a circuit breaker, wherein the overcurrent tripping mechanism secures one end to a terminal for fixing an inserted electric wire with a terminal screw and a connection seat installed on the terminal. Provided with a bimetal to be pressed, a latching piece to be pressed and driven by the bimetal, and a guide portion provided between the latching piece and the bimetal and suppressing excessive rotation of the bimetal due to tightening of the terminal screw. An overcurrent tripping mechanism.
JP2008097009A 2008-04-03 2008-04-03 Overcurrent trip mechanism Active JP5170657B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102359997B (en) * 2011-06-22 2014-04-09 吉林省辉南长龙生化药业股份有限公司 Discriminating method for lidanqing Wan

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0326613Y2 (en) * 1986-11-10 1991-06-10
JPH05342967A (en) * 1992-06-04 1993-12-24 Mitsubishi Electric Corp Circuit breaker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102359997B (en) * 2011-06-22 2014-04-09 吉林省辉南长龙生化药业股份有限公司 Discriminating method for lidanqing Wan

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