JP2002025415A - Pull-out device for circuit breaker - Google Patents

Pull-out device for circuit breaker

Info

Publication number
JP2002025415A
JP2002025415A JP2000207585A JP2000207585A JP2002025415A JP 2002025415 A JP2002025415 A JP 2002025415A JP 2000207585 A JP2000207585 A JP 2000207585A JP 2000207585 A JP2000207585 A JP 2000207585A JP 2002025415 A JP2002025415 A JP 2002025415A
Authority
JP
Japan
Prior art keywords
core
iron core
bimetal
locking portion
spring
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.)
Granted
Application number
JP2000207585A
Other languages
Japanese (ja)
Other versions
JP3763250B2 (en
Inventor
Tomoyuki Sawada
知行 澤田
Tetsuyasu Kawamoto
哲靖 川本
Hatsuo Mizuno
初男 水野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP2000207585A priority Critical patent/JP3763250B2/en
Publication of JP2002025415A publication Critical patent/JP2002025415A/en
Application granted granted Critical
Publication of JP3763250B2 publication Critical patent/JP3763250B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Breakers (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a pull-out device for a circuit breaker, which can be miniaturized and moreover enhance the magnetic force by a magnetic field generated around a current-carrying circuit. SOLUTION: A first core 41 and a second core 44 are arranged to surround a part of current-carrying circuit including contact points 2a, 2b. On end side the opposing faces of the first core 41 and of the second core 44 are brought into contact, and the other is spaced apart. When a large current flows in the current-carrying circuit, the sides put apart of the first core 41 and the second core 44 are attracted together, and the locking state is released. When an overcurrent flows in the current-carrying circuit, a free end of a bimetal 42 is deformed to move the first core 41 and release its locking state. Furthermore, when the first core 41 moves in accordance with the deformation of the free end of the bimetal 42, the second core 44 moves toward the deformation direction of the free end of the bimetal 42.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、通電電路に過大電
流が流れたときに第１鉄心および第２鉄心の離間側を近
接させて係止部に係止された開閉機構の一部を解除し、
接点を強制開極する回路遮断器の引外し装置に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for releasing a part of an opening / closing mechanism locked in a locking portion by bringing a first core and a second core close to each other when an excessive current flows in a current carrying circuit. And
The present invention relates to a circuit breaker trip device for forcibly opening a contact.

【０００２】[0002]

【従来の技術】一般に、回路遮断器は、電源と負荷との
間の通電電路に挿入された接点を閉極した状態でばね等
により開極方向の力を蓄えた状態で係止され、過電流な
いし短絡電流のような異常電流が通電電路を通過する
と、異常電流を検出する引外し装置によって係止状態が
解除され接点が強制開極されるように構成されている。2. Description of the Related Art Generally, a circuit breaker is locked in a state in which a contact inserted in a current path between a power supply and a load is closed and a force in an opening direction is stored by a spring or the like, and the circuit breaker is closed. When an abnormal current such as a current or a short-circuit current passes through the current path, the tripping device that detects the abnormal current releases the locked state and forcibly opens the contacts.

【０００３】引外し装置としては、たとえば、特開平６
−１６２９１０号公報に記載されたもののように、通電
電路に挿入したバイメタルが吸着片を保持し、磁性材料
のラッチ可動片を吸着片に対向して配置した構成を採用
したものがある。ラッチ可動片はバイメタルの一端部に
係止されており、通電電路に過電流が流れバイメタルが
自己発熱によって撓むとラッチ可動片もバイメタルとと
もに撓んでラッチを解除する。また、通電電路に短絡電
流が流れると吸着片がラッチ可動片を磁力により吸引し
てラッチを解除する。このように、過電流に対してはバ
イメタルの自己発熱による撓みを利用し、短絡電流に対
しては磁力を利用する構成を採用している。[0003] As a tripping device, for example, Japanese Unexamined Patent Publication No.
As described in Japanese Patent Application Laid-Open No. 162910, a structure adopting a structure in which a bimetal inserted into a current-carrying electric path holds a suction piece and a movable piece of a latch made of a magnetic material is arranged to face the suction piece. The latch movable piece is locked to one end of the bimetal, and when an overcurrent flows in the current path and the bimetal is bent by self-heating, the latch movable piece also bends together with the bimetal to release the latch. In addition, when a short-circuit current flows through the current path, the attracting piece attracts the latch movable piece by magnetic force to release the latch. As described above, a configuration is used in which the bending due to the self-heating of the bimetal is used for the overcurrent, and the magnetic force is used for the short-circuit current.

【０００４】[0004]

【発明が解決しようとする課題】上述したものにあって
は、ラッチ可動片自体に開閉機構部の被係止部を係止す
る係止部が一体形成されているので、開閉機構部の被係
止部を係止するための別部材を必要とせず組立性が向上
している。In the above-described apparatus, since the latch movable portion itself is integrally formed with the locking portion for locking the locked portion of the opening / closing mechanism portion, the movable portion of the opening / closing mechanism portion is integrally formed. This eliminates the need for a separate member for locking the locking portion, thus improving the ease of assembly.

【０００５】しかしながら、上述の短絡電流が流れたと
きの引外し装置である引外し装置を構成する吸引鉄片の
先端とラッチ可動片との間を離間させているので、引外
し装置自体の配設スペースを大きくとる必要があり、ま
た離間しているため吸引鉄粉とラッチ可動片との間の吸
引力が弱くなるという問題があった。However, since the tip of the attracting iron piece and the movable piece of the latch constituting the tripping device which is the tripping device when the short-circuit current flows, are separated from each other, the disposition of the tripping device itself is performed. There is a problem that the space needs to be large and the suction force between the attracted iron powder and the latch movable piece is weakened due to the space.

【０００６】本発明は上記事由に鑑みて為されたもので
あり、その目的は、組立性が向上し、小型化が図れ、し
かも係止状態を解除する際の電磁吸引力を強くすること
ができる回路遮断器の引外し装置を提供することにあ
る。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to improve the assemblability, reduce the size, and increase the electromagnetic attraction force when releasing the locked state. It is an object of the present invention to provide a device for tripping a circuit breaker.

【０００７】[0007]

【課題を解決するための手段】請求項１の発明は、電源
と負荷との間の通電電路に挿入された接点と、接点の閉
極時に接点を開極する向きの力を蓄えて係止状態とし係
止状態が解除されると前記力により接点を強制開極させ
る開閉機構とを器体に備える回路遮断器に用いられ、接
点の閉極時に大電流が前記通電電路に流れると前記係止
状態を解除して接点を強制開極させる引外し装置であっ
て、一対の側片の一端間を一体に連結した形状の一方の
主鉄心との間で前記通電電路の一部を囲繞するように配
設されて一端側を前記一方の主鉄心の２つの側片に当接
させるとともに他端側を前記一方の主鉄心の２つの側片
から離間させた状態で保持される他方の主鉄心とをそれ
ぞれ備える第１鉄心および第２鉄心を備え、第１鉄心と
第２鉄心との一方に一体形成されて開閉機構を係止状態
とする係止部を設け、通電電路に大電流が流れると第１
鉄心と第２鉄心との離間側を吸着させて開閉機構と係止
部との係止状態を解除することにより接点を強制開極さ
せるものである。この構成によれば、一方の主鉄心の２
つの側片に他方の主鉄心の一端側が当接しているので、
電磁吸引力が大きくなり、各鉄心の大きさを小さくでき
る。また、係止部を第１鉄心または第２鉄心に一体形成
しているので、これら鉄心とは別体の係止部材を必要と
せず、部品点数を少なくすることができる。その結果、
組立性が向上し、小型化が図れるとともに第１鉄心およ
び第２鉄心間の吸引力を強くすることができる。According to a first aspect of the present invention, there is provided a contact which is inserted into a current carrying path between a power supply and a load, and which stores and locks a force for opening the contact when the contact is closed. And a switching mechanism for forcibly opening the contact by the force when the contact is released is used in a circuit breaker provided in the body. A trip device for releasing a stop state and forcibly opening a contact, wherein a part of the current-carrying circuit is surrounded between the pair of side pieces and one main iron core having one end integrally connected. And one end of the other main core is held in a state where one end thereof is in contact with the two side pieces of the one main core and the other end is separated from the two side pieces of the one main iron core. A first iron core and a second iron core each having an iron core; one of the first iron core and the second iron core; An engagement portion provided for the opening and closing mechanism and the locking state is integrally formed, first a large current flows through the current path
The contact is forcibly opened by releasing the locked state between the opening / closing mechanism and the locking portion by attracting the separated side of the core and the second core. According to this configuration, one main iron core 2
As one end of the other main iron core is in contact with one side piece,
The electromagnetic attraction increases, and the size of each iron core can be reduced. Further, since the locking portion is formed integrally with the first core or the second core, a separate locking member is not required from these cores, and the number of parts can be reduced. as a result,
The assemblability is improved, the size can be reduced, and the suction force between the first and second cores can be increased.

【０００８】請求項２の発明は、請求項１の発明におい
て、前記通電電路を過電流によって自由端側が変位する
バイメタルとし、バイメタルの自由端側に前記係止部を
備えた第１鉄心または第２鉄心をバイメタルの変位によ
って前記係止部と前記開閉機構との係止状態を解除する
方向として連結する板ばねよりなる保持ばねを設けたも
のである。この構成によれば、過電流が流れるとバイメ
タルが変位し、このバイメタルの変位によって保持ばね
を介して係止部を有する第１鉄心または第２鉄心が駆動
され、開閉機構の一部を係止部から解除して接点を強制
開極することができる。According to a second aspect of the present invention, in the first aspect of the present invention, the energizing circuit is formed of a bimetal whose free end is displaced by an overcurrent, and the first core or the second iron core having the locking portion on the free end of the bimetal. (2) A holding spring made of a plate spring is provided for connecting the iron core in a direction in which the locking state between the locking portion and the opening / closing mechanism is released by the displacement of the bimetal. According to this configuration, when an overcurrent flows, the bimetal is displaced, and the displacement of the bimetal drives the first iron core or the second iron core having the locking portion via the holding spring, and locks a part of the opening / closing mechanism. And the contacts can be forcibly opened.

【０００９】請求項３の発明は、請求項２の発明におい
て、前記バイメタルの自由端側を、開閉機構の一部が係
止部に係止された状態でその係止力が働く方向として配
設したものである。この構成によれば、過電流が流れた
ときに、バイメタルの固定端を支点としてバイメタルの
自由端側が開閉機構の一部の係止力を弱める方向で係止
部から開閉機構の一部を解除する方向に回転するので、
素早く解除することができる。According to a third aspect of the present invention, in the second aspect of the invention, the free end side of the bimetal is arranged as a direction in which the locking force acts when a part of the opening and closing mechanism is locked by the locking portion. It was established. According to this configuration, when an overcurrent flows, the free end of the bimetal releases a part of the opening / closing mechanism from the locking portion in a direction to weaken the locking force of a part of the opening / closing mechanism with the fixed end of the bimetal as a fulcrum. Because it rotates in the direction
Can be released quickly.

【００１０】請求項４の発明は、請求項２の発明におい
て、前記バイメタルの自由端側を、開閉機構の一部が係
止部に係止された状態でその係止力が働かない方向とし
て配設したものである。この構成によれば、過電流が流
れたときに、バイメタルの固定端を支点としてバイメタ
ルの自由端側が開閉機構の一部の係止力を強める方向で
係止部から開閉機構の一部を解除する方向に回転するの
で、開閉機構の一部を係止部に確実に係止させ易くでき
る。According to a fourth aspect of the present invention, in the second aspect of the invention, the free end side of the bimetal is set to a direction in which the locking force does not work when a part of the opening / closing mechanism is locked in the locking portion. It is arranged. According to this configuration, when an overcurrent flows, the free end of the bimetal releases the part of the opening / closing mechanism from the locking portion in a direction in which the locking force of the part of the opening / closing mechanism is increased with the fixed end of the bimetal as a fulcrum. In this case, a part of the opening / closing mechanism can be easily locked to the locking portion.

【００１１】請求項５の発明は、請求項２ないし請求項
４の発明において、前記第１鉄心と前記第２鉄心とを連
結するとともに第１鉄心および第２鉄心の離間側で係止
部が非形成な第２鉄心または第１鉄心を係止部が形成さ
れた第１鉄心または第２鉄心側として付勢する板ばねよ
りなる取付ばねを設け、取付ばねによって付勢された係
止部が非形成な第２鉄心または第１鉄心の係止部が形成
された第１鉄心または第２鉄心との対向面側に当接する
移動規制部を器体に設けたものである。この構成によれ
ば、短絡電流等の大電流が流れると、バイメタルを基端
として取付ばねの弾性力で係止部が形成された第１鉄心
または第２鉄心が、係止部が非形成な第２鉄心または第
１鉄心側に移動し、開閉機構の一部を係止部から解除し
て接点を強制開極させることができる。また、過電流が
流れると、バイメタルの変位にともなってバイメタルと
ともに第１鉄心および第２鉄心の両方が移動することと
なり、もってバイメタルの反りを防止し、過電流引外し
特性のばらつきを抑えることができる。According to a fifth aspect of the present invention, in the invention of the second to fourth aspects, the first core and the second core are connected to each other, and a locking portion is provided on a side of the separation between the first core and the second core. A mounting spring composed of a plate spring that urges the non-formed second core or the first iron core as the first core or the second core having the locking portion is provided, and the locking portion urged by the mounting spring is provided. A body is provided with a movement restricting portion that abuts on a surface of the non-formed second iron core or the first iron core in which a locking portion of the first iron core or the second iron core is formed. According to this configuration, when a large current such as a short-circuit current flows, the first iron core or the second iron core having the locking portion formed by the elastic force of the mounting spring with the bimetal as the base end has no locking portion. It is possible to move to the second core or the first core, release part of the opening / closing mechanism from the locking portion, and forcibly open the contact. In addition, when an overcurrent flows, both the first and second cores move together with the bimetal along with the displacement of the bimetal, thereby preventing warping of the bimetal and suppressing variation in overcurrent tripping characteristics. it can.

【００１２】請求項６の発明は、請求項１または請求項
３または請求項４の発明において、前記通電電路を過電
流によって自由端側が変位するバイメタルとし、バイメ
タルの自由端側に前記係止部を備えた第１鉄心または第
２鉄心をバイメタルの変位によって前記係止部と前記開
閉機構との係止状態を解除する方向として連結するとと
もに前記第１鉄心と前記第２鉄心とを連結し、かつ第１
鉄心および第２鉄心の離間側で係止部が非形成な第２鉄
心または第１鉄心を係止部が形成された第１鉄心または
第２鉄心側として付勢する板ばねよりなる取付保持ばね
を設け、取付保持ばねによって付勢された係止部が非形
成な第２鉄心または第１鉄心の係止部が形成された第１
鉄心または第２鉄心との対向面側に当接する移動規制部
を器体に設けたものである。この構成によれば、保持ば
ねと取付ばねとの機能を一体化した取付保持ばねを用い
るから、部品点数を削減して組立性を向上させることが
できる。According to a sixth aspect of the present invention, in the first, third, or fourth aspect of the invention, the energizing circuit is a bimetal whose free end is displaced by an overcurrent, and the locking portion is provided on the free end of the bimetal. A first iron core or a second iron core provided with a first metal core and a second iron core, the first metal core and the second iron core being connected by a bimetal displacement as a direction in which a locking state between the locking portion and the opening / closing mechanism is released; And the first
A mounting and holding spring comprising a leaf spring for urging the second or first core having no locking portion on the side away from the core and the second core as the first or second core having the locking portion. And a first core having a second core or a first core formed with no locking portion urged by the attachment holding spring.
The body is provided with a movement restricting portion that abuts on the side facing the iron core or the second iron core. According to this configuration, since the mounting and holding spring in which the functions of the holding spring and the mounting spring are integrated is used, the number of components can be reduced and the assemblability can be improved.

【００１３】請求項７の発明は、請求項２ないし請求項
４の発明において、前記係止部が非形成な第２鉄心また
は第１鉄心の係止部が形成された第１鉄心または第２鉄
心との離間側を器体に回動自在に軸支させ、係止部が非
形成な第２鉄心または第１鉄心を係止部が形成された第
１鉄心または第２鉄心方向に付勢する復帰ばねを前記器
体内に配設したものである。この構成によれば、短絡電
流等の大電流が流れると、バイメタルの自由端側を支点
として復帰ばねの弾性力でもって係止部が形成された第
１鉄心または第２鉄心が復帰ばねのばね力に逆らって係
止部が非形成な第２鉄心または第１鉄心側に回転するこ
ととなり、開閉機構の一部を係止部から解除して接点を
強制開極することができる。また、過電流が流れると、
バイメタルの自由端とともに係止部が形成された第１鉄
心または第２鉄心が、係止部が非形成な第２鉄心または
第１鉄心を復帰ばねのばね力に逆らって駆動するので、
バイメタルの反りを防止し、過電流引外し特性のばらつ
きを抑えることができる。According to a seventh aspect of the present invention, in the second to fourth aspects of the present invention, the second iron core or the first iron core or the second iron core having the first iron core locking portion is not formed. The side away from the iron core is rotatably supported by the container, and the second core or the first iron core having no locking portion is urged toward the first core or the second core where the locking portion is formed. A return spring is provided in the housing. According to this configuration, when a large current such as a short-circuit current flows, the first iron core or the second iron core having the locking portion formed by the elastic force of the return spring with the free end side of the bimetal as a fulcrum is the spring of the return spring. The locking portion rotates toward the second or first core side where the locking portion is not formed against the force, so that a part of the opening / closing mechanism is released from the locking portion and the contact can be forcibly opened. When an overcurrent flows,
Since the first or second core having the locking portion formed together with the free end of the bimetal drives the second or first core having no locking portion against the spring force of the return spring,
The warpage of the bimetal can be prevented, and variations in overcurrent tripping characteristics can be suppressed.

【００１４】請求項８の発明は、請求項１の発明におい
て、前記通電電路を過電流によって自由端側が変位する
バイメタルとし、前記係止部を有する第１鉄心または第
２鉄心からバイメタルの自由端側に延出してバイメタル
の変位によって係止部に係止された開閉機構部の一部を
解除する方向に駆動される駆動部を設けたものである。
この構成によれば、過電流が流れるとバイメタルが変位
し、バイメタルで駆動部を駆動して開閉機構部の一端を
係止部から解除して接点を強制開極することができる。According to an eighth aspect of the present invention, in the first aspect of the present invention, the energizing current path is made of a bimetal whose free end is displaced by an overcurrent, and the free end of the bimetal is connected to the first or second iron core having the locking portion. A drive unit is provided which extends to the side and is driven in a direction to release a part of the opening / closing mechanism unit locked by the locking unit by the displacement of the bimetal.
According to this configuration, when an overcurrent flows, the bimetal is displaced, and the driving unit is driven by the bimetal to release one end of the opening / closing mechanism unit from the locking unit, thereby forcibly opening the contact.

【００１５】請求項９の発明は、請求項８の発明におい
て、前記第１鉄心および前記第２鉄心間を、第１鉄心と
第２鉄心との離間側を離す方向に付勢する板ばねを介し
て連結したものである。この構成によれば、第１鉄心お
よび第２鉄心間を板ばねを介して連結しているので、第
１鉄心および第２鉄心をブロック化して組み立てること
ができ、収納作業が容易となる。According to a ninth aspect of the present invention, in the eighth aspect of the present invention, there is provided a leaf spring for urging the first iron core and the second iron core in a direction in which a separation side between the first iron core and the second iron core is separated. Are connected via According to this configuration, since the first core and the second core are connected via the leaf spring, the first core and the second core can be assembled into a block, and the storing operation is facilitated.

【００１６】請求項１０の発明は、請求項９の発明にお
いて、前記バイメタルを連結してバイメタルに対向する
固定電路を設け、該固定電路に係止部が非形成な第２鉄
心または第１鉄心を固定したものである。この構成によ
れば、係止部が非形成な第２鉄心または第１鉄心を、バ
イメタルを連結した固定電路に固定しているので、第１
鉄心および第２鉄心に加えてバイメタルをまとめてブロ
ック化することができ、請求項３の効果に加え、さらに
収納作業が容易となる。According to a tenth aspect of the present invention, in the ninth aspect of the present invention, a fixed electric path is provided opposite to the bimetal by connecting the bimetals, and a second core or a first iron core having no locking portion formed in the fixed electric path. Is fixed. According to this configuration, the second core or the first iron core having no locking portion is fixed to the fixed electric circuit connecting the bimetals.
In addition to the iron core and the second iron core, the bimetal can be collectively made into a block, so that the storing operation is further facilitated in addition to the effect of the third aspect.

【００１７】請求項１１の発明は、請求項８の発明にお
いて、前記バイメタルに係止部が非形成な第２鉄心また
は第１鉄心を固着したものである。この構成によれば、
バイメタルに係止部が非形成な第２鉄心または第１鉄心
を固着しているので、バイメタルの変位によって係止部
が非形成な第２鉄心または第１鉄心も同時に変位するの
で、バイメタルが変位したときに係止部が非形成な第２
鉄心または第１鉄心にバイメタルが当ってバイメタルが
それ以上変位しなくなるのを防止でき、もってバイメタ
タルの反りを防止し、過電流引外し特性のばらつきを抑
えることができる。According to an eleventh aspect of the present invention, in the invention of the eighth aspect, the second iron core or the first iron core having no locking portion is fixed to the bimetal. According to this configuration,
Since the second core or the first iron core having no locking portion is fixed to the bimetal, the displacement of the bimetal causes the second core or the first iron core having no locking portion to be displaced at the same time. When the locking part is not formed when the second
It is possible to prevent the bimetal from hitting the iron core or the first iron core so that the bimetal is no longer displaced, thereby preventing the bimetal from warping and suppressing the variation in overcurrent tripping characteristics.

【００１８】請求項１２の発明は、請求項８の発明にお
いて、前記係止部が形成された第１鉄心または第２鉄心
の係止部が非形成な第２鉄心または第１鉄心との当接側
を器体に回動自在に軸支させ、第１鉄心および第２鉄心
の離間側を離す方向に付勢する復帰ばねを前記器体内に
設けたものである。この構成によれば、軸部と軸受部に
よって係止部が形成された第１鉄心または第２鉄心を器
体に回動自在に軸支させ、復帰ばねで第１鉄心と第２鉄
心との離間側を離す方向に付勢することで第１鉄心と第
２鉄心との当接側を当接させるとともに離間側を離した
状態で保持することができる。According to a twelfth aspect of the present invention, in the invention of the eighth aspect, the first iron core or the second iron core having the locking portion formed thereon is not in contact with the second core or the first iron core having no locking portion formed thereon. A return spring is provided in the body so that the contact side is rotatably supported by the body and the biasing force is applied in a direction in which the separated sides of the first and second cores are separated. According to this configuration, the first iron core or the second iron core in which the locking portion is formed by the shaft portion and the bearing portion is rotatably supported on the body, and the return spring is used to connect the first iron core and the second iron core. By biasing in the direction in which the separated side is separated, the contact side between the first core and the second core can be brought into contact with each other, and the separated side can be held in a separated state.

【００１９】請求項１３の発明は、請求項８の発明にお
いて、前記係止部が形成された第１鉄心または第２鉄心
の係止部が非形成な第２鉄心または第１鉄心との当接側
と、係止部が非形成な第２鉄心または第１鉄心の第１鉄
心または第２鉄心との離間側とを器体に回動自在に軸支
させ、係止部が非形成な第２鉄心または第１鉄心を係止
部が形成された第１鉄心または第２鉄心方向に付勢する
復帰ばねを前記器体内に配設したものである。この構成
によれば、短絡電流等の大電流が流れると、復帰ばねの
付勢力に逆らって係止部が非形成な第２鉄心または第１
鉄心側に、係止部が形成された第１鉄心または第２鉄心
がその軸支位置を中心に回動する。また、過電流が流れ
てバイメタルが変位すると、係止部が形成された第１鉄
心または第２鉄心が軸支位置を中心に回動するが、その
まま係止部が非形成な第２鉄心または第１鉄心を復帰ば
ねのばね力に逆らって駆動することができ、バイメタル
の反りを防止し、過電流引外し特性のばらつきを抑える
ことができる。According to a thirteenth aspect of the present invention, in the eighth aspect of the present invention, the first iron core or the second iron core on which the locking part is formed is not in contact with the second iron core or the first iron core having no locking part. The contact side and the second core having no locking portion or the side of the first iron core separated from the first core or the second iron core are rotatably supported by the body so that the locking portion is not formed. A return spring for urging the second iron core or the first iron core in the direction of the first iron core or the second iron core in which the locking portion is formed is disposed in the body. According to this configuration, when a large current such as a short-circuit current flows, the second iron core or the first iron core having no locking portion formed against the urging force of the return spring.
The first or second core having the locking portion formed on the side of the core rotates about its pivotal position. When an overcurrent flows and the bimetal is displaced, the first core or the second iron core having the locking portion is rotated about the pivot position, but the second core or the second core having no locking portion is formed as it is. The first iron core can be driven against the spring force of the return spring, thereby preventing the bimetal from warping and suppressing the variation in overcurrent tripping characteristics.

【００２０】請求項１４の発明は、請求項８の発明にお
いて、前記バイメタルを連結してバイメタルに対向する
固定電路を設け、該固定電路と係止部が形成された第１
鉄心または第２鉄心との間と、第１鉄心および第２鉄心
の離間側で係止部が非形成な第２鉄心または第１鉄心を
係止部が形成された第１鉄心または第２鉄心側として付
勢した状態で第１鉄心と第２鉄心との間とを連結する板
ばねを設け、第２の板ばねによって付勢された係止部が
非形成な第２鉄心または第１鉄心の係止部が形成された
第１鉄心または第２鉄心との対向面側に当接する移動規
制部を器体に設けたものである。この構成によれば、バ
イメタルおよび係止部を有した第１鉄心または第２鉄心
を同一の固定電路に連結することができ、ブロック化が
図れて収納性が向上する。According to a fourteenth aspect of the present invention, in the first aspect of the present invention, a fixed electric path is provided by connecting the bimetals, the fixed electric path facing the bimetal, and the fixed electric path and the locking portion are formed.
A first iron core or a second iron core having a locking portion formed between a second iron core or a first iron core having no locking portion between the iron core or the second iron core and a side away from the first iron core and the second iron core. A plate spring for connecting the first core and the second core in a state of being urged as a side, wherein the second core or the first core in which the locking portion urged by the second plate spring is not formed; In this case, the body is provided with a movement restricting portion that comes into contact with the first iron core or the second iron core on which the locking portion is formed. According to this configuration, the first iron core or the second iron core having the bimetal and the locking portion can be connected to the same fixed electric circuit, and the storage is improved by blocking.

【００２１】[0021]

【発明の実施の形態】（第１の実施の形態）本実施形態
の回路遮断器は、図１に示すように、合成樹脂成形品で
ある直方体状の器体１を有し、器体１内には、器体１の
幅方向（図１の面に直交する方向）に並設された２組の
接点２ａ，２ｂと、接点２ａ，２ｂを一括して開閉する
開閉機構３と、接点２ａ，２ｂが挿入された通電電路に
異常電流が通過したときに接点２ａ，２ｂを強制開極さ
せるように開閉機構３を作動させる引外し装置４とが収
納される。接点２ａ，２ｂは器体１に固定された２個の
固定接点２１ａ，２１ｂと、各固定接点２１ａ，２１ｂ
に離接する可動接点２２ａ，２２ｂとを備えている。す
なわち、本実施形態では２極の回路遮断器を示す。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) As shown in FIG. 1, a circuit breaker according to this embodiment has a rectangular parallelepiped body 1 which is a synthetic resin molded article. Inside, two sets of contacts 2a and 2b arranged side by side in the width direction of the body 1 (a direction orthogonal to the plane of FIG. 1), an opening and closing mechanism 3 for opening and closing the contacts 2a and 2b collectively, and a contact A trip device 4 that activates the opening / closing mechanism 3 so as to forcibly open the contacts 2a and 2b when an abnormal current passes through the current carrying path into which the 2a and 2b are inserted is housed. The contacts 2a and 2b are composed of two fixed contacts 21a and 21b fixed to the body 1 and fixed contacts 21a and 21b, respectively.
And movable contacts 22a and 22b which are separated from and separated from the movable contacts 22a and 22b. That is, this embodiment shows a two-pole circuit breaker.

【００２２】固定接点２１ａは、図の正面側に開放され
た断面コ字状の端子板２３から延設された接点保持片２
３ａに固着される。接点保持片２３ａは端子板２３の下
片の側縁から下向きに延長された後に器体１の下壁に沿
って端子板２３から離れる向きに延長されたＬ字状に形
成され、器体１の下面に沿って延長されている部位の上
面に固定接点２１ａが露出する。また、端子板２３は、
器体１の側面（図１の左側面）に近い部位ほど上片と下
片とが器体１の下壁との距離を広げるように、器体１の
下壁に対して斜めに傾斜するように配置される。端子板
２３の上片と下片との間には鎖錠ばね２４が配置され
る。鎖錠ばね２４は帯状の板ばねの長手方向の一端部を
Ｊ字状に曲成して鎖錠片２４ａを形成し他端部をＳ字状
に曲成して接触片２４ｂを形成した略ム字状であって、
鎖錠片２４ａおよび接触片２４ｂが端子板２３の上片に
向き合うように配置される。したがって、器体１の側壁
に形成した電線挿入孔１１を通して器体１に挿入される
電線が鎖錠片２４ａおよび接触片２４ｂと端子板２３の
上片との間に鎖錠片２４ａ側から挿入されると、鎖錠片
２４ａおよび接触片２４ｂのばね力によって端子板２３
の上片との間に電線が挟持されて電線が端子板２３に電
気的に接続され、さらに鎖錠片２４ａが電線に食い込ん
で電線の引き抜きが防止される（すなわち、鎖錠され
る））。この種の端子の構造は速結端子構造として周知
のものである。端子板２３には鎖錠ばね２４を位置決め
するための突起２３ｃが切り起こして形成されている。The fixed contact 21a is a contact holding piece 2 extending from a terminal plate 23 having a U-shaped cross section opened to the front side in the figure.
3a. The contact holding piece 23a is formed in an L-shape extending downward from the side edge of the lower piece of the terminal plate 23 and then extending away from the terminal plate 23 along the lower wall of the body 1, and The fixed contact 21a is exposed on the upper surface of the portion extending along the lower surface of the fixed contact 21a. In addition, the terminal plate 23
The upper piece and the lower piece are inclined obliquely with respect to the lower wall of the body 1 so that a portion closer to the side surface (the left side surface in FIG. 1) of the body 1 increases the distance from the lower wall of the body 1. Are arranged as follows. A lock spring 24 is arranged between the upper piece and the lower piece of the terminal plate 23. The lock spring 24 is formed by bending one end of a belt-shaped leaf spring in the longitudinal direction into a J-shape to form a lock piece 24a and bending the other end into an S-shape to form a contact piece 24b. It is shaped like
The lock piece 24a and the contact piece 24b are arranged so as to face the upper piece of the terminal plate 23. Therefore, the electric wire inserted into the body 1 through the wire insertion hole 11 formed in the side wall of the body 1 is inserted between the locking pieces 24a and the contact pieces 24b and the upper piece of the terminal plate 23 from the locking piece 24a side. Then, the terminal plate 23 is moved by the spring force of the locking piece 24a and the contact piece 24b.
The electric wire is sandwiched between the upper piece and the electric wire, and the electric wire is electrically connected to the terminal plate 23. Further, the lock piece 24a bites into the electric wire to prevent the wire from being pulled out (that is, locked). . This type of terminal structure is well known as a quick-connect terminal structure. A protrusion 23c for positioning the locking spring 24 is cut and raised on the terminal plate 23.

【００２３】端子板２３と鎖錠ばね２４とにより保持さ
れた電線の鎖錠状態を解除するために、器体１の上面に
設けた露出窓１２から操作部２５ａが露出する解除ハン
ドル２５が設けられており、解除ハンドル２５は下部の
両側面に設けた軸支部２５ｂが器体１に対して軸支さ
れ、露出窓１２の範囲内で操作部２５ａが移動可能にな
っている。解除ハンドル２５の下部には鎖錠片２４ａに
当接可能な解除突起２５ｃが突設され、操作部２５ａを
手操作して解除ハンドル２５を軸支部２５ｂの回りで図
の反時計方向に回転させると、解除突起２５ｃが鎖錠片
２４ａの先端部を下向きに押して端子板２３の上片から
鎖錠片２４ａを引き離して電線の鎖錠状態を解除する。
この状態においては電線は引き抜き可能になる。ここ
に、鎖錠片２４ａにおいて電線を保持する部位と解除突
起２５ｃが当接する部位とはずらしてある。In order to release the locked state of the electric wire held by the terminal plate 23 and the locking spring 24, a release handle 25 is provided in which the operation portion 25a is exposed from the exposure window 12 provided on the upper surface of the body 1. The release handle 25 has pivot portions 25b provided on both lower side surfaces of the release handle 25, which are pivotally supported with respect to the body 1, and the operation portion 25a is movable within the range of the exposure window 12. At the lower part of the release handle 25, a release projection 25c that can be brought into contact with the lock piece 24a is protruded, and the release handle 25 is rotated around the shaft support 25b counterclockwise by manual operation of the operation part 25a. Then, the release projection 25c pushes the tip of the lock piece 24a downward to separate the lock piece 24a from the upper piece of the terminal plate 23 to release the locked state of the electric wire.
In this state, the wire can be pulled out. Here, the part of the lock piece 24a that holds the electric wire and the part that the release protrusion 25c abuts are shifted.

【００２４】一方、固定接点２１ｂは、端子板２３の背
方に配置された断面コ字状の端子板から延設した接点保
持片２３ｂに固着される。接点保持片２３ｂは端子板の
下片の側縁から上向きに延長された後に端子板から離れ
る向きに延長されたＬ字状に形成され、器体１の内面に
設けた隔壁部１３に沿うように配置される。この接点保
持片２３ｂの先端部の上面に固定接点２１ｂが突出す
る。この端子板は端子板２３と同様に器体１の下壁に対
して斜めに傾斜するように配置され、鎖錠ばね２４と同
構成を有した鎖錠ばね（図示せず）を保持する。また、
鎖錠ばねに対応するように解除ハンドル２５と同構成を
有した解除ハンドルが設けられる。つまり、解除ハンド
ル２５は各鎖錠ばね２４ごとに独立して個別に設けられ
る。On the other hand, the fixed contact 21b is fixed to a contact holding piece 23b extending from a U-shaped terminal plate disposed behind the terminal plate 23. The contact holding piece 23b is formed in an L-shape extending upward from the side edge of the lower piece of the terminal plate and then extending away from the terminal plate so as to extend along the partition 13 provided on the inner surface of the body 1. Placed in The fixed contact 21b protrudes from the upper surface of the tip of the contact holding piece 23b. The terminal plate is disposed so as to be obliquely inclined with respect to the lower wall of the body 1 like the terminal plate 23, and holds a lock spring (not shown) having the same configuration as the lock spring 24. Also,
A release handle having the same configuration as the release handle 25 is provided to correspond to the locking spring. That is, the release handles 25 are provided independently and individually for each locking spring 24.

【００２５】上述した構成から明らかなように、固定接
点２１ａは固定接点２１ｂよりも下側に配置されること
になる。各固定接点２１ａ，２１ｂにそれぞれ対応する
可動接点２２ａ，２２ｂはそれぞれ開閉機構３に連結さ
れた可動接触子２６ａ，２６ｂの端部に保持され、可動
接触子２６ａ，２６ｂにおいて可動接点２２ａ，２２ｂ
を設けた端部は開閉機構３により駆動されて上下に移動
する。ここに、下側の固定接点２１ａに対応する可動接
触子２６ａは移動範囲の上端位置において上側の固定接
点２１ｂに干渉しないように配置される。また図示して
いないが、両接点２ａ，２ｂ間には絶縁材料からなる隔
壁部材が配置され、両接点２ａ，２ｂの間の絶縁距離が
保たれている。As is apparent from the above configuration, the fixed contact 21a is disposed below the fixed contact 21b. The movable contacts 22a and 22b respectively corresponding to the fixed contacts 21a and 21b are held at the ends of the movable contacts 26a and 26b connected to the opening / closing mechanism 3, respectively, and the movable contacts 22a and 22b in the movable contacts 26a and 26b.
Is driven by the opening / closing mechanism 3 and moves up and down. Here, the movable contact 26a corresponding to the lower fixed contact 21a is arranged so as not to interfere with the upper fixed contact 21b at the upper end position of the moving range. Although not shown, a partition member made of an insulating material is disposed between the two contacts 2a and 2b to maintain an insulation distance between the two contacts 2a and 2b.

【００２６】開閉機構３は、器体１の上面に開口する窓
孔１４を通して起伏する操作部３１ａを備えたハンドル
３１を有し、操作部３１ａの一端部には回転部３１ｂが
一体に形成され、回転部３１ｂは窓孔１４の内側で器体
１に支承されるハンドル軸３１ｃを備える。したがっ
て、ハンドル３１は操作部３１ａが窓孔１４の開口面と
略面一になる位置と、操作部３１ａが窓孔１４から突出
する位置との間で起伏自在になっている。器体１におけ
る窓孔１４の内周面には、ハンドル３１の回転部３１ｂ
に設けた案内突起３１ｄが摺接する弧状の案内面１４ａ
が形成され、ハンドル３１の起伏時に案内突起３１ｄが
案内面１４ａに摺接することによってハンドル３１が滑
らかに起伏する。また、窓孔１４にはストップ１４ｂが
突設され、ハンドル３１を倒したときに操作部３１ａが
ストップ１４ｂに当接することによってハンドル３１の
位置が規制される。The opening / closing mechanism 3 has a handle 31 having an operating portion 31a which rises and falls through a window hole 14 opened on the upper surface of the body 1, and a rotating portion 31b is integrally formed at one end of the operating portion 31a. The rotating part 31b has a handle shaft 31c supported by the body 1 inside the window hole 14. Therefore, the handle 31 can be raised and lowered between a position where the operation portion 31 a is substantially flush with the opening surface of the window hole 14 and a position where the operation portion 31 a protrudes from the window hole 14. The rotating part 31b of the handle 31 is provided on the inner peripheral surface of the window hole 14 of the body 1.
Guide surface 14a with which the guide projection 31d provided in the sliding contact
Is formed, and when the handle 31 is raised and lowered, the guide projection 31d slides on the guide surface 14a, so that the handle 31 is smoothly raised and lowered. Further, a stop 14b is protrudingly provided in the window hole 14, and the position of the handle 31 is regulated by bringing the operation portion 31a into contact with the stop 14b when the handle 31 is tilted.

【００２７】ハンドル３１の回転部３１ｂにはコ字状の
リンク３２の上端部が軸着され、リンク３２の下端部に
は作動板３３が軸着される。また、開閉機構３は、可動
接触子２６ａ，２６ｂを保持する合成樹脂成形品の保持
体３４を備え、保持体３４の上端部側面には軸部３４ｃ
が突設され、軸部３４ｃは器体１に回転自在に軸支され
る。保持体３４の下端部と器体１の底部との間にはコイ
ルばねからなる開極ばね３５が保持され、保持体３４は
開極ばね３５のばね力によって図１における時計方向に
付勢されている。ここにおいて、可動接触子２６ｂは合
成を有する導電性金属板により短冊状に形成され長手方
向の中間部が保持体３４の一方の側面（図１の裏面）に
設けた切溝３４ｂに挿通され、可動接触子２６ｂの下面
と保持体３４との間にはコイルばねからなる接圧ばね３
６が挟持される。また、保持体３４の他方の側面（図１
の正面）に設けた切溝３４ａには薄肉の導電性金属板に
より形成された可動接触子２６ａの中間部が挿入され
る。上述したハンドル３１、リンク３２、作動板３３、
保持体３４、開極ばね３５、接圧ばね３６は開閉機構３
を構成しており、開閉機構３は後述する引外し装置４と
連携して動作することによって、接点２ａ，２ｂを開閉
させる。An upper end of a U-shaped link 32 is pivotally mounted on the rotating portion 31 b of the handle 31, and an operation plate 33 is pivotally mounted on a lower end of the link 32. Further, the opening / closing mechanism 3 includes a holding body 34 of a synthetic resin molded product holding the movable contacts 26a and 26b.
Are projected, and the shaft portion 34c is rotatably supported by the body 1. An opening spring 35 composed of a coil spring is held between the lower end of the holding body 34 and the bottom of the body 1, and the holding body 34 is urged clockwise in FIG. 1 by the spring force of the opening spring 35. ing. Here, the movable contact 26b is formed in a strip shape by a synthetic conductive metal plate, and an intermediate portion in the longitudinal direction is inserted into a cut groove 34b provided on one side surface (the back surface in FIG. 1) of the holder 34, A contact pressure spring 3 composed of a coil spring is provided between the lower surface of the movable contact 26b and the holder 34.
6 are clamped. Further, the other side surface of the holding body 34 (FIG. 1)
The front part of the movable contact 26a formed of a thin conductive metal plate is inserted into the cut groove 34a provided at the front of the movable contact 26a. The above-described handle 31, link 32, operating plate 33,
The holding body 34, the opening spring 35, and the contact pressure spring 36
The opening and closing mechanism 3 opens and closes the contacts 2a and 2b by operating in cooperation with a trip device 4 described later.

【００２８】ところで、作動板３３は短冊状に形成され
た主片３３ａを有し、主片３３ａの長手方向の中間部の
両側に垂設された軸受片３３ｂを備える。軸受片３３ｂ
は先端部が弧状に形成され、保持体３４の上面において
軸部３４ｃよりも接点２ａ，２ｂ寄りに突設された突起
部３４ｄに当接可能になっている。主片３３ａにおける
接点２ａ，２ｂ側の一端部は突起部３４ｄの先端に当接
可能であって、主片３３ａにおける他端部は引外し装置
４に設けた係止部としてのラッチ突起４１ａ（後述す
る）に係合可能になっている。The operating plate 33 has a main piece 33a formed in a strip shape, and has bearing pieces 33b vertically provided on both sides of an intermediate portion in the longitudinal direction of the main piece 33a. Bearing piece 33b
The tip is formed in an arc shape, and is capable of abutting on a projection 34d projecting closer to the contacts 2a and 2b than the shaft 34c on the upper surface of the holder 34. One end of the main piece 33a on the side of the contacts 2a, 2b can contact the tip of the projection 34d, and the other end of the main piece 33a has a latch projection 41a ( (To be described later).

【００２９】器体１の右側部には分電盤内に配設される
導電バー（図示せず）に接続可能な端子台５０が設けら
れる。端子台５０は上下３箇所に挿入溝５１ａ〜５１ｃ
を有し、各挿入溝５１ａ〜５１ｃのうちの上下の2個の
挿入溝５１ａ，５１ｃに対応して刃受ばね５２ａ，５２
ｃが配置される。各刃受ばね５２ａ，５２ｂは上下一対
のばね片を備え、両ばね片の間に導電バーを挟むことに
よって導電バーに電気的に接続されるようにしてある。
上側の刃受ばね５２ａには可動接触子２６ａの一端部が
固着されており、可動接触子２６ａは器体１の下部まで
延長された後、器体１の下壁に沿って延長され、さらに
可動接点２２ａが固着されている部位に向かって器体１
の下壁との距離を大きくするように傾斜した傾斜片２６
ｃが延長形成される。可動接触子２６ａは傾斜片２６ｃ
の先端から延長形成された接点保持片２６ｄを備え、接
点保持片２６ｄの中間部が保持体３４に設けた切溝３４
ａに挿入されている。一方、下側の刃受ばね５２ｂには
上方向に延長されたバイメタル固定板５３が固定電路と
して固着される。バイメタル固定板５３の上端部は器体
１の内周面に設けた保持部１ａにより保持され、バイメ
タル固定板５３において保持部１ａよりも上方には図１
の正面側に開放されたコ字状の固定片５３ａが設けら
れ、固定片５３ａの一端部には引外し装置４を構成する
バイメタル４２の上端部が固着される。つまり、バイメ
タル４２の上端部がバイメタルの固定端になり、下端部
がバイメタル４２の自由端になる。On the right side of the housing 1, a terminal block 50 is provided which can be connected to a conductive bar (not shown) provided in the distribution board. The terminal block 50 has three insertion grooves 51a to 51c at the top and bottom.
And blade receiving springs 52a, 52c corresponding to the upper and lower two insertion grooves 51a, 51c of the respective insertion grooves 51a-51c.
c is arranged. Each blade receiving spring 52a, 52b has a pair of upper and lower spring pieces, and is electrically connected to the conductive bar by sandwiching the conductive bar between the two spring pieces.
One end of the movable contact 26a is fixed to the upper blade receiving spring 52a, and the movable contact 26a extends to the lower part of the body 1, then extends along the lower wall of the body 1, and The body 1 moves toward the portion where the movable contact 22a is fixed.
Inclined piece 26 inclined to increase the distance from the lower wall
c is extended. The movable contact 26a is an inclined piece 26c.
A contact holding piece 26d extended from the tip of the contact holding piece 26d.
a. On the other hand, a bimetal fixing plate 53 extending upward is fixed to the lower blade receiving spring 52b as a fixed electric path. The upper end of the bimetal fixing plate 53 is held by a holding portion 1a provided on the inner peripheral surface of the container 1, and the upper portion of the bimetal fixing plate 53 is higher than the holding portion 1a in FIG.
An open U-shaped fixing piece 53a is provided on the front side of the fixing device 53. An upper end of the bimetal 42 constituting the trip device 4 is fixed to one end of the fixing piece 53a. That is, the upper end of the bimetal 42 is a fixed end of the bimetal, and the lower end is a free end of the bimetal 42.

【００３０】図５および図６に示すように、バイメタル
４２の下端部の両側縁には板ばねよりなる保持ばね４３
が固定される。保持ばね４３はバイメタル４２に当接す
る固定片４３ａを下端部に備え、固定片４３ａの両側縁
にはバイメタル４２の下部両側縁に設けた切欠溝４２ａ
に係合する形でバイメタル４２にかしめ固定されるかし
め片４３ｂが設けられる。また、固定片４３ａの上縁か
らはバイメタル４２から離れる向きに撓み片４３ｃが延
長され、撓み片４３ｃの先端から上方に向かって取付片
４３ｄが延長される。取付片４３ｄはフェライトのよう
な磁性体からなる第１鉄心４１の下部に重ね合わされ
る。取付片４３ｄの両側縁にはかしめ片４３ｅが設けら
れ、かしめ片４３ｅが第１鉄心４１にかしめ固定され
る。As shown in FIGS. 5 and 6, a holding spring 43 made of a leaf spring is
Is fixed. The holding spring 43 has a fixing piece 43a at the lower end which comes into contact with the bimetal 42. Notch grooves 42a provided on both lower edges of the bimetal 42 are provided on both side edges of the fixing piece 43a.
A caulking piece 43b is provided which is caulked and fixed to the bimetal 42 in such a manner as to engage with the metal. Further, a bending piece 43c is extended from the upper edge of the fixing piece 43a in a direction away from the bimetal 42, and a mounting piece 43d is extended upward from the tip of the bending piece 43c. The mounting piece 43d is superimposed on the lower part of the first iron core 41 made of a magnetic material such as ferrite. Caulking pieces 43e are provided on both side edges of the mounting piece 43d, and the caulking pieces 43e are caulked and fixed to the first iron core 41.

【００３１】第１鉄心４１は、バイメタル４２の中間部
における厚み方向の一面および両側面を囲むコ字状ない
しＵ字状に形成された主鉄心４１ｂを備え、主鉄心４１
ｂの下端からは固定片４１ｃが突設され、主鉄心４１ｂ
の上端からは位置規制片４１ｄが突設される。つまり、
主鉄心４１ｂはバイメタル４２の幅方向の両側に配置さ
れた一対の側片を有し両側片をバイメタル４２の厚み方
向の一面側で連結した形状に形成されていることにな
る。固定片４１ｃの両側縁には固定溝４１ｅが形成さ
れ、固定溝４１ｅにかしめ片４３ｅが係合してかしめ固
定されることにより、第１鉄心４１に保持ばね４３が固
定される。第１鉄心４１の外側面にはラッチ突起４１ａ
が突設され、ラッチ突起４１ａには上述した開閉機構３
の作動板３３の一端部が係止可能になっている。The first iron core 41 has a main iron core 41b formed in a U-shape or a U-shape surrounding one surface and both side surfaces in the thickness direction at an intermediate portion of the bimetal 42.
A fixing piece 41c protrudes from the lower end of the main iron core 41b.
A position restricting piece 41d is protruded from the upper end of the member. That is,
The main iron core 41b has a pair of side pieces arranged on both sides in the width direction of the bimetal 42, and is formed in a shape in which both side pieces are connected on one surface side in the thickness direction of the bimetal 42. Fixing grooves 41e are formed on both side edges of the fixing piece 41c, and the holding spring 43 is fixed to the first iron core 41 by engaging the caulking piece 43e with the fixing groove 41e. A latch projection 41a is provided on the outer surface of the first iron core 41.
The latching projection 41a is provided with the opening / closing mechanism 3 described above.
One end of the operating plate 33 can be locked.

【００３２】ところで、第１鉄心４１の主鉄心４１ｂは
上述のようにコ字状ないしＵ字状に形成されているか
ら、図１における主鉄心４１ｂの右端面（図５の左端
面）は開放され磁極面４１ｆを形成している。一方、磁
極面４１ｆに対向する形でフェライトのような磁性体か
らなる第２鉄心４４が配設され、第２鉄心４４は板ばね
よりなる取付ばね４５を介して第１鉄心４１に結合され
ている。第２鉄心４４は矩形状に形成された主鉄心４４
ａにおける第１鉄心４１との対向面にダボ４４ｂが突設
され、主鉄心４４ａの上面には位置規制突起４４ｃが突
設される。一方、取付ばね４５は、ダボ４４ｂが挿入固
定される固定孔４５ａを有した固定片４５ｂを備え、固
定片４５ｂの下端部には第２鉄心４４から離れる向きに
屈曲されたばね片４５ｃが形成され、ばね片４５ｃの下
端縁には第１鉄心４１の主鉄心４１ｂの下面を受ける受
け片４５ｄが形成されている。受け片４５ｄの両側縁に
は主鉄心４１ｂの外側面に当接可能な抱え片４５ｅが上
向きに突設され、各抱え片４５ｅにおいて固定片４５ｂ
から遠い側の端縁には、主鉄心４１ｂの外側面に形成さ
れた２個の引掛溝４１ｇにそれぞれ係合する引掛片４５
ｆが突設される。つまり、第２鉄心４４に固定された取
付ばね４５が第１鉄心４１に係合することによって第１
鉄心４１と第２鉄心４４とが取付ばね４５を介して連結
されるのである。Since the main iron core 41b of the first iron core 41 is formed in a U-shape or U-shape as described above, the right end face (left end face in FIG. 5) of the main iron core 41b in FIG. 1 is open. Thus, a magnetic pole surface 41f is formed. On the other hand, a second iron core 44 made of a magnetic material such as ferrite is provided so as to face the magnetic pole surface 41f, and the second iron core 44 is connected to the first iron core 41 via a mounting spring 45 made of a leaf spring. I have. The second iron core 44 is a main iron core 44 formed in a rectangular shape.
A dowel 44b protrudes from the surface facing the first iron core 41 at a, and a position regulating protrusion 44c protrudes from the upper surface of the main iron core 44a. On the other hand, the mounting spring 45 includes a fixing piece 45b having a fixing hole 45a into which the dowel 44b is inserted and fixed, and a spring piece 45c bent at a lower end of the fixing piece 45b in a direction away from the second core 44. A receiving piece 45d for receiving the lower surface of the main iron core 41b of the first iron core 41 is formed at the lower end edge of the spring piece 45c. On both side edges of the receiving piece 45d, holding pieces 45e that can abut on the outer side surface of the main iron core 41b are provided to protrude upward.
The hook pieces 45 respectively engaging with two hook grooves 41g formed on the outer surface of the main iron core 41b are provided on the edge farther from the main iron core 41b.
f is projected. In other words, the first spring 41 fixed to the second core 44 engages with the first
The iron core 41 and the second iron core 44 are connected via the mounting spring 45.

【００３３】以上説明したように、バイメタル４２に保
持ばね４３を介して第１鉄心４１が結合され、第２鉄心
４４が取付ばね４５を介して第１鉄心４１に結合される
から、第１鉄心４１とバイメタル４２と保持ばね４３と
第２鉄心４４と取付ばね４５とは一体化され、引外し装
置４を１つの部材として扱うことが可能になる。ここ
に、バイメタル４２は第１鉄心４１の主鉄心４１ｂと第
２鉄心４４の主鉄心４４ａとに囲まれる空間内に挿通さ
れ、バイメタル４２への通電に伴ってバイメタル４２の
周囲に形成される磁束が第１鉄心４１および第２鉄心４
４を通るようにしてある。As described above, the first iron core 41 is connected to the bimetal 42 via the holding spring 43, and the second iron core 44 is connected to the first iron core 41 via the mounting spring 45. 41, the bimetal 42, the holding spring 43, the second iron core 44, and the mounting spring 45 are integrated, and the trip device 4 can be handled as one member. Here, the bimetal 42 is inserted into a space surrounded by the main iron core 41b of the first iron core 41 and the main iron core 44a of the second iron core 44, and a magnetic flux formed around the bimetal 42 when the bimetal 42 is energized. Are the first iron core 41 and the second iron core 4
Pass through 4.

【００３４】ところで、第１鉄心４１の磁極面４１ｆは
第２鉄心４４に対向しており、バイメタル４２に電流が
流れていない状態では、磁極面４１ｆと第２鉄心４４と
は下端部のみ当接し、上端部は互いに離れるように配置
される。また、器体１に引き外し装置４を組み付けた状
態では、第１鉄心４１の位置規制片４１ｄが器体１の内
周面に突設した位置規制突起１ｂに当接し、第２鉄心４
４の位置規制突起４４ｃが器体１の内周面に設けた移動
規制部としての位置規制溝１ｃに挿入される。By the way, the magnetic pole surface 41f of the first iron core 41 is opposed to the second iron core 44, and when no current flows through the bimetal 42, the magnetic pole surface 41f and the second iron core 44 abut only at the lower end. , The upper ends are arranged apart from each other. Further, in a state where the tripping device 4 is assembled to the body 1, the position regulating pieces 41 d of the first iron core 41 abut against the position regulating protrusions 1 b protruding from the inner peripheral surface of the body 1, and the second iron core 4.
The fourth position regulating projection 44c is inserted into a position regulating groove 1c as a movement regulating portion provided on the inner peripheral surface of the container 1.

【００３５】引外し装置４に設けたバイメタル４２の上
端部は上述のようにバイメタル固定板５３を介して刃受
ばね５２ｃに接続されている。また、バイメタル４２の
下端部は編組線４７を介して可動接触子２６ｂの一端部
に接続されている。したがって、刃受ばね５２ｃと図示
しない端子板（端子板２３の背面側の端子板）との間に
は、バイメタル固定板５３−バイメタル４２−編組線４
７−可動接触子２６ｂ−可動接点２２ｂ−固定接点２１
ｂ−接点保持片２３ｂの経路の通電電路が形成される。
さらに、刃受ばね５２ａと端子板２３との間には、可動
接触子２６ａ−可動接点２２ａ−固定接点２１ａ−接点
保持片２３ａの経路の通電電路が形成される。The upper end of the bimetal 42 provided in the trip unit 4 is connected to the blade receiving spring 52c via the bimetal fixing plate 53 as described above. The lower end of the bimetal 42 is connected to one end of the movable contact 26b via a braided wire 47. Therefore, between the blade receiving spring 52c and a terminal plate (not shown) (terminal plate on the back side of the terminal plate 23), a bimetal fixing plate 53-bimetal 42-braided wire 4 is provided.
7-movable contact 26b-movable contact 22b-fixed contact 21
An energization electric path of the path of the b-contact holding piece 23b is formed.
Further, between the blade receiving spring 52a and the terminal plate 23, an energizing electric path of a path of the movable contact 26a-the movable contact 22a-the fixed contact 21a-the contact holding piece 23a is formed.

【００３６】次に、本実施形態の動作を説明する。図１
は接点２ａ，２ｂの閉極状態を示しており、この状態で
はハンドル３１が倒されて操作部３１ａがストップ１４
ｂに当接し、リンク３２の上端はハンドル軸３１ｃより
も左側に位置している。リンク３２の下端に連結された
作動板３３の左端部は、保持体３４に設けた突起部３４
ｄに当接し、開極ばね３５のばね力によってリンク３２
との結合部の回りに時計方向の回転力を受ける。ここ
で、作動板３３の右端部は第１鉄心４１に設けたラッチ
突起４１ａの上に係止されているから、作動板３３は回
転せず、結果的に保持体３４は開極ばね３５を圧縮して
可動接触子２６ａ，２６ｂを下向きに押し付けることに
なり、可動接点２２ａ，２２ｂが固定接点２１ａ，２１
ｂに接触することになる。このとき、開極ばね３５のば
ね力によって作動板３３を押し上げる向きの力が作用す
るが、リンク３２の上端がハンドル軸３１ｃよりも左側
に位置するからハンドル３１には時計方向の回転力が作
用し、ハンドル３１は倒された位置に保たれる。また、
切溝３４ａの上壁が可動接触子２６ａの接点保持片２６
ｄを上から押さえることによって、可動接点２２ａの固
定接点２１ａに対する接触圧が得られるようになってお
り、可動接触子２６ｂについても切溝３４ｂの上壁に一
部が接触した状態で接圧ばね３６のばね力が作用するこ
とによって可動接点２２ｂの固定接点２１ｂに対する接
触圧が得られるようになっている。Next, the operation of this embodiment will be described. FIG.
Indicates a closed state of the contacts 2a and 2b. In this state, the handle 31 is tilted and the operation unit 31a is stopped.
b, and the upper end of the link 32 is located on the left side of the handle shaft 31c. The left end of the operation plate 33 connected to the lower end of the link 32 is provided with a protrusion 34 provided on the holder 34.
d and a link 32 by the spring force of the opening spring 35.
Receives a clockwise rotational force around the joint with the. Here, since the right end of the operation plate 33 is locked on the latch projection 41a provided on the first iron core 41, the operation plate 33 does not rotate, and as a result, the holding body 34 operates the opening spring 35. The movable contacts 26a, 26b are pressed downward by compression, and the movable contacts 22a, 22b become fixed contacts 21a, 21b.
b. At this time, a force in the direction of pushing up the operating plate 33 is applied by the spring force of the opening spring 35, but a clockwise rotational force is applied to the handle 31 since the upper end of the link 32 is located on the left side of the handle shaft 31c. Then, the handle 31 is kept at the tilted position. Also,
The upper wall of the notch 34a is the contact holding piece 26 of the movable contact 26a.
By pressing d from above, a contact pressure of the movable contact 22a against the fixed contact 21a can be obtained, and the contact pressure spring of the movable contact 26b also partially contacts the upper wall of the cut groove 34b. The contact pressure of the movable contact 22b to the fixed contact 21b is obtained by the action of the spring force 36.

【００３７】一方、図１の閉極状態からハンドル３１を
図２のように起こすと、リンク３２の上端がハンドル軸
３１ｃの右側に位置するように引き上げられ、作動板３
３が上方に引き上げられるから保持体３４は作動板３３
に接触しなくなり、開極ばね３５のばね力によって保持
体３４が時計方向に回転することになる。その結果、保
持体３４に保持された可動接触子２６ａ，２６ｂが引き
上げられ、可動接点２２ａ，２２ｂが固定接点２１ａ，
２１ｂから上方に離れて開極する。すなわち、ハンドル
３１の操作部３１ａを起こすことによって開極状態にな
る。ここに、開極状態では保持体３４の下部が隔壁部１
３に当接することによって保持体３４の時計方向への回
転位置が規制される。On the other hand, when the handle 31 is raised from the closed state of FIG. 1 as shown in FIG. 2, the upper end of the link 32 is pulled up so as to be located on the right side of the handle shaft 31c, and the operating plate 3
3 is lifted upward, so that the holding body 34 is
And the holding body 34 is rotated clockwise by the spring force of the opening spring 35. As a result, the movable contacts 26a, 26b held by the holding body 34 are pulled up, and the movable contacts 22a, 22b become fixed contacts 21a,
The contact is opened upward away from 21b. That is, opening the operating portion 31a of the handle 31 results in the opening state. Here, in the open state, the lower part of the holding body 34 is
The rotation position of the holding body 34 in the clockwise direction is regulated by contacting the holding member 3.

【００３８】ところで、図１の閉極状態においてバイメ
タル４２を含む通電電路に過電流が流れると、バイメタ
ル４２は図３および図８に示すように、下端部を図の右
側に変位させるように撓み、バイメタル４２に対して保
持ばね４３を介して連結されている第１鉄心４１の下端
部が上端部に対して右側に移動するから、ラッチ突起４
１ａと作動板３３との係止状態が解除される。その結
果、作動板３３はリンク３２の下端の回りで回転可能に
なり、開極ばね３５のばね力により保持体３４が時計方
向に回転して可動接点２２ａ，２２ｂが固定接点２１
ａ，２１ｂから開極することになる。このとき、作動板
３３はリンク３２の下端の回りで自由に回転することで
開極ばね３５のばね力はハンドル３１に伝達されず、ハ
ンドル３１の操作部３１ａは倒れた状態に保たれる。つ
まり、いわゆるトリップフリーの状態になる。この状態
において保持体３４は隔壁部１３に当接することによっ
て、回転位置が規制される。When an overcurrent flows through the conducting circuit including the bimetal 42 in the closed state shown in FIG. 1, the bimetal 42 bends so as to displace the lower end portion to the right in the drawing, as shown in FIGS. Since the lower end of the first iron core 41 connected to the bimetal 42 via the holding spring 43 moves to the right with respect to the upper end, the latch protrusion 4
The locked state between 1a and the operation plate 33 is released. As a result, the operation plate 33 becomes rotatable around the lower end of the link 32, and the holding member 34 rotates clockwise by the spring force of the opening spring 35, and the movable contacts 22a and 22b become fixed contacts 21.
a, 21b. At this time, the operating plate 33 is freely rotated around the lower end of the link 32, so that the spring force of the opening spring 35 is not transmitted to the handle 31, and the operating portion 31a of the handle 31 is kept in a collapsed state. That is, a trip-free state is established. In this state, the rotation position is regulated by the contact of the holding body 34 with the partition 13.

【００３９】バイメタル４２を含む通電電路に短絡電流
のような大電流が流れたときには、バイメタル４２の周
囲に生じる磁界によって第１鉄心４１と第２鉄心４４と
の間に吸引力が作用する。第１鉄心４１の磁極面４１ｆ
の下端部は第２鉄心４４と接触しているから、図４およ
び図９に示すように、第１鉄心４１の上部と第２鉄心４
４との間に吸引力が作用して第１鉄心４１の上部が図の
右向きに急速に移動する。その結果、第１鉄心４１のラ
ッチ突起４１ａは作動板３３から外れ、過電流が流れた
ときと同様に、可動接点２２ａ，２２ｂが固定接点２１
ａ，２１ｂから開極する。また、この場合もトリップフ
リーの状態になる。When a large current, such as a short-circuit current, flows through the current path including the bimetal 42, an attractive force acts between the first iron core 41 and the second iron core 44 by a magnetic field generated around the bimetal 42. Magnetic pole surface 41f of first iron core 41
4 is in contact with the second iron core 44, the upper end of the first iron core 41 and the second iron core 4, as shown in FIGS.
4, an upper portion of the first iron core 41 rapidly moves rightward in the drawing. As a result, the latch projection 41a of the first iron core 41 is disengaged from the operating plate 33, and the movable contacts 22a and 22b are fixed to the fixed contact 21 similarly to the case where an overcurrent flows.
a, 21b. Also in this case, a trip-free state is set.

【００４０】引外し装置４の動作をさらに詳しく説明す
る。図１の閉極状態では、第１鉄心４１のラッチ突起４
１ａに作動板３３が係止されており、第１鉄心４１は保
持ばね４３により上端部を図の左側に倒し、位置規制片
４１ｄを器体の位置規制突起１ｂに当接させている。第
１鉄心４１の磁極面４１ｆは下端のみが第２鉄心４４に
接触しており、第２鉄心４４は取付ばね４５のばね片４
５ｃによって左向きに付勢されている。この状態におい
て、第２鉄心４４の上部に設けた位置規制突起４４ｃが
器体１の位置規制溝１ｃの左周壁に当接し、第２鉄心４
４の下部は第１鉄心４１に当接する。すなわち、第１鉄
心４１は保持ばね４３によってバイメタル４２の自由端
に結合され、保持ばね４３のばね力によってバイメタル
４２から引き離される向きに付勢されているが、位置規
制片４１ｄが器体１の位置規制突起１ｂに当接すること
によって、バイメタル４２との位置関係が決定される。
また、取付ばね４５に設けたばね片４５ｃによって第１
鉄心４１と第２鉄心４４との位置関係が決定される。The operation of the trip device 4 will be described in more detail. In the closed state of FIG.
The operation plate 33 is locked to 1a, the upper end of the first iron core 41 is tilted to the left side in the figure by the holding spring 43, and the position restricting piece 41d is brought into contact with the position restricting projection 1b of the body. Only the lower end of the magnetic pole surface 41 f of the first core 41 is in contact with the second core 44, and the second core 44 is
5c is urged to the left. In this state, the position regulating protrusion 44c provided on the upper part of the second core 44 abuts on the left peripheral wall of the position regulating groove 1c of the body 1, and the second core 4
The lower part of 4 contacts the first iron core 41. That is, the first iron core 41 is coupled to the free end of the bimetal 42 by the holding spring 43 and is urged in a direction in which the first iron core 41 is separated from the bimetal 42 by the spring force of the holding spring 43. By contacting the position regulating protrusion 1b, the positional relationship with the bimetal 42 is determined.
In addition, the first spring piece 45c provided on the mounting spring 45
The positional relationship between the iron core 41 and the second iron core 44 is determined.

【００４１】ここで、バイメタル４２に過電流が通過す
ると、図２に示すように、バイメタル４２の下端部が右
側に変位するようにバイメタル４２が撓み、ラッチ突起
４１ａと作動板３３との係止状態を解除する。ここで、
第２鉄心４４が固定されているとすれば、第１鉄心４１
の移動範囲が規制されてバイメタル４２が撓みにくくか
つバイメタル４２がＳ字状に撓むことになって、バイメ
タル４２の本来の撓み方向とは異なる向きの力がバイメ
タル４２に作用することになる。このような力がバイメ
タル４２に作用するとバイメタル４２が塑性変形するこ
とがあり、ラッチ突起４１ａが作動板３３との係止状態
を解除する電流値が大きくなって、動作すべき過電流に
対して動作しないことになる。これに対して、本実施形
態の構成では第２鉄心４４をバイメタル４２の撓み方向
に移動可能としていることによって、バイメタル４２の
下端部が右側に撓んで第１鉄心４１の下端部が右側に移
動すると、第２鉄心４４が第１鉄心４１に押されて右側
に移動するから、ラッチ突起４１ａが作動板３３との係
止状態を解除する電流値を上昇させるような変形をバイ
メタル４２に生じさせることがなくなるのである。Here, when an overcurrent passes through the bimetal 42, as shown in FIG. 2, the bimetal 42 bends so that the lower end of the bimetal 42 is displaced rightward, and the latch projection 41a and the operating plate 33 are locked. Release the state. here,
If the second core 44 is fixed, the first core 41
Is restricted, the bimetal 42 is not easily bent, and the bimetal 42 is bent in an S-shape, so that a force different from the original bending direction of the bimetal 42 acts on the bimetal 42. When such a force acts on the bimetal 42, the bimetal 42 may be plastically deformed, and the current value at which the latch projection 41 a releases the locked state with the operation plate 33 increases, thereby preventing an overcurrent to be operated. Will not work. On the other hand, in the configuration of the present embodiment, since the second core 44 is movable in the bending direction of the bimetal 42, the lower end of the bimetal 42 is bent rightward, and the lower end of the first core 41 moves rightward. Then, since the second iron core 44 is pushed by the first iron core 41 and moves rightward, the bimetal 42 is deformed such that the latch protrusion 41 a increases the current value for releasing the locked state with the operation plate 33. It is gone.

【００４２】バイメタル４２に短絡電流が通過したとき
には、図３に示すように、バイメタル４２はほとんど撓
まずに第１鉄心４１が第２鉄心４４に吸着することによ
って、ラッチ突起４１ａと作動板３３との係止状態が解
除される。つまり、短絡電流がバイメタル４２を通過す
るとバイメタル４２が自己発熱によって高温になるか
ら、この状態でバイメタル４２が湾曲するとバイメタル
４２が塑性変形しやすくなるが、第１鉄心４１の磁極面
４１ｆの下端が第２鉄心４４に当接していることによっ
て、第１鉄心４１と第２鉄心４４との間の磁気抵抗が比
較的小さく、第１鉄心４１に生じる磁力を第２鉄心４４
に効率よく作用させることができ、バイメタル４２が変
形する前に、第１鉄心４１を第２鉄心４４に瞬時に吸着
させ、ラッチ突起４１ａと作動板３３との係止状態を解
除することができるのである。When the short-circuit current passes through the bimetal 42, as shown in FIG. 3, the bimetal 42 hardly bends and the first iron core 41 is attracted to the second iron core 44. Is released. That is, when the short-circuit current passes through the bimetal 42, the bimetal 42 becomes high in temperature due to self-heating. If the bimetal 42 bends in this state, the bimetal 42 is likely to be plastically deformed. Due to the contact with the second core 44, the magnetic resistance between the first core 41 and the second core 44 is relatively small, and the magnetic force generated in the first core 41 is reduced by the second core 44.
Before the bimetal 42 is deformed, the first iron core 41 can be instantaneously attracted to the second iron core 44 to release the latching state between the latch projection 41a and the operating plate 33. It is.

【００４３】（第２の実施の形態）本実施形態は、図７
ないし図９に示す構成の引外し装置４を用いるものであ
って、第１の実施の形態における取付ばね４５を省略
し、器体１に保持されたねじりコイルばね４６を第２鉄
心４４に当接させて、第２鉄心４４を第１鉄心４１に当
接させる向きに付勢しているものである。(Second Embodiment) This embodiment is similar to FIG.
9 is used, the mounting spring 45 in the first embodiment is omitted, and the torsion coil spring 46 held in the body 1 is applied to the second iron core 44. The second core 44 is urged in a direction in which the second core 44 is brought into contact with the first core 41.

【００４４】しかして、接点２ａ，２ｂの閉極状態で
は、図７に示すように、ラッチ突起４１ａが作動板３３
に係止され、このときねじりコイルばね４６のばね力が
第２鉄心４４を介して第１鉄心４１に伝達されることに
よって、第１鉄心４１の位置規制片４１ｄが器体１に設
けた位置規制突起１ｂに当接し、第１鉄心４１の主鉄心
４１ｂと第２鉄心４４の主鉄心４４ａとは下端部のみ当
接させた状態に保たれる。また第２鉄心４４の位置規制
突起４４ｃは器体１に設けた位置規制溝１ｃに挿入され
ているから、位置規制溝１ｃの左側の周壁に当接するこ
とで第２鉄心４４の移動も規制される。バイメタル４２
に過電流が通過すれば、図８に示すように、バイメタル
４２の下端部が右方に変位するように撓み、第１鉄心４
１の下部が保持ばね４３とともに右方に移動するからラ
ッチ突起４１ａは作動板３３を係止している状態を解除
し接点２ａ，２ｂを開極させる。このとき、第１鉄心４
１が右方に移動することによって第２鉄心４４が右方に
押され、バイメタル４２の不自然な変形が防止される。
また、バイメタル４２に短絡電流が流れたときには、図
９に示すように、第１鉄心４１が第２鉄心４４に吸引さ
れ、ラッチ突起４１ａが作動板３３の係止状態を解除す
る。他の構成および動作は第１の実施の形態と同様であ
る。When the contacts 2a and 2b are in the closed state, the latch projection 41a is connected to the operating plate 33 as shown in FIG.
At this time, the spring force of the torsion coil spring 46 is transmitted to the first iron core 41 via the second iron core 44, so that the position regulating piece 41d of the first iron core 41 is provided on the body 1 The main iron core 41b of the first iron core 41 and the main iron core 44a of the second iron core 44 are kept in contact with each other at the lower end portions thereof. Further, since the position regulating protrusion 44c of the second core 44 is inserted into the position regulating groove 1c provided in the body 1, the movement of the second iron core 44 is regulated by contacting the left peripheral wall of the position regulating groove 1c. You. Bimetal 42
8, the lower end of the bimetal 42 is bent so as to be displaced rightward as shown in FIG.
Since the lower portion of 1 moves rightward together with the holding spring 43, the latch projection 41a releases the state in which the operation plate 33 is locked, and opens the contacts 2a and 2b. At this time, the first iron core 4
By moving 1 to the right, the second iron core 44 is pushed to the right, and unnatural deformation of the bimetal 42 is prevented.
When a short-circuit current flows through the bimetal 42, as shown in FIG. 9, the first iron core 41 is attracted to the second iron core 44, and the latch projection 41a releases the locked state of the operation plate 33. Other configurations and operations are the same as those of the first embodiment.

【００４５】（第３の実施の形態）本実施形態は、図１
０ないし図１２に示す構成の引外し装置４を用いるもの
であって、第１の実施の形態とは第１鉄心４１の主鉄心
４１ｂと第２鉄心４４の主鉄心４４ａとの形状が入れ替
わっている。つまり、第１鉄心４１は主鉄心４１ｂが平
板状であって、第２鉄心４４は主鉄心４４ａが断面コ字
状ないし断面Ｕ字状に形成されている。また、第１の実
施の形態において説明した保持ばね４３と取付ばね４５
との機能を合わせ持つ図１３に示す構成の取付保持ばね
４８を用いている。(Third Embodiment) This embodiment is similar to FIG.
The first embodiment uses a tripping device 4 having a configuration shown in FIGS. 0 to 12, and is different from the first embodiment in that the shapes of the main iron core 41 b of the first iron core 41 and the main iron core 44 a of the second iron core 44 are interchanged. I have. That is, the first iron core 41 has a main iron core 41b having a flat plate shape, and the second iron core 44 has a main iron core 44a having a U-shaped or U-shaped cross section. Further, the holding spring 43 and the mounting spring 45 described in the first embodiment are used.
An attachment holding spring 48 having the configuration shown in FIG.

【００４６】取付保持ばね４８は、図１３に示すよう
に、バイメタル４２の下端部（自由端）に重複する固定
片４８ａを備え、固定片４８ａの両側縁にはバイメタル
４２に設けた切欠溝４２ａに係合してかしめ固定される
かしめ片４８ｂが設けられる。固定片４８ａからは上方
に向かってバイメタル４２との距離を広げるように傾斜
する部位を有したばね片４８ｃが延長され、ばね片４８
ｃの上端縁の両側部からはバイメタル４２から離れる向
きに屈曲されて第１鉄心４１の主片４１ｂの下面を受け
る一対の受け片４８ｄが延長される。また、ばね片４８
ｃの上端縁の中間部には上方に延長された押さえ片４８
ｅが延長される。受け片４８ｄの先端縁には押さえ片４
８ｅとの間で第１鉄心４１の主鉄心４１ｂを保持する一
対の保持片４８ｆが上方に向かって延長され、各保持片
４８ｆの上端部外側縁からは、第２鉄心４４の主鉄心４
４ａの外側面に当接する一対の抱え片４８ｇが延長され
る。さらに各抱え片４８ｇの先端部には第２鉄心４４の
主鉄心４４ａの外側面に設けた固定溝４４ｅに係合して
かしめ固定されるかしめ片４８ｈが設けられる。As shown in FIG. 13, the mounting and holding spring 48 has a fixed piece 48a that overlaps the lower end (free end) of the bimetal 42, and has cutout grooves 42a formed in the bimetal 42 on both side edges of the fixed piece 48a. And a caulking piece 48b which is fixed by caulking. From the fixing piece 48a, a spring piece 48c having a portion inclined upward so as to increase the distance from the bimetal 42 is extended, and the spring piece 48c is extended.
From both sides of the upper edge of c, a pair of receiving pieces 48d which are bent away from the bimetal 42 and receive the lower surface of the main piece 41b of the first iron core 41 are extended. Also, the spring piece 48
In the middle part of the upper edge of c, a holding piece 48 extended upward
e is extended. Pressing piece 4 is provided on the tip edge of receiving piece 48d.
A pair of holding pieces 48f holding the main iron core 41b of the first iron core 41 extend upward from the upper core 8e, and the main iron core 4 of the second iron core 44 extends from the outer edge of the upper end of each of the holding iron pieces 48f.
48 g of a pair of holding pieces which contact the outer surface of 4a are extended. Further, a caulking piece 48h which is engaged with a fixing groove 44e provided on the outer surface of the main iron core 44a of the second iron core 44 and is caulked and fixed is provided at the tip end of each holding piece 48g.

【００４７】したがって、第１鉄心４１と第２鉄心４４
とバイメタル４２とが取付保持ばね４８を介して一体に
結合されることになる。また、ばね片４８ｃのばね力を
押さえ片４８ｅから第１鉄心４１に伝達することによっ
て、第１鉄心４１の上端部を図の左方に倒す向きのばね
力を与え、またばね片４８ｃは第２鉄心４４も図の左方
に倒す向き（つまり、第１鉄心４１に近付ける向き）の
ばね力を与える。ただし、第２鉄心４４の位置規制突起
４４ｃは器体１の位置規制溝１ｃに挿入され、位置規制
溝１ｃの左周壁に当接することによって第２鉄心４４の
移動が規制される。Therefore, the first iron core 41 and the second iron core 44
And the bimetal 42 are integrally connected via the attachment holding spring 48. Further, by transmitting the spring force of the spring piece 48c from the holding piece 48e to the first iron core 41, a spring force in a direction in which the upper end of the first iron core 41 is tilted leftward in the drawing is given. The second iron core 44 also applies a spring force in a direction in which it is tilted leftward in the drawing (that is, a direction in which it comes closer to the first iron core 41). However, the position regulating protrusion 44c of the second core 44 is inserted into the position regulating groove 1c of the body 1, and the movement of the second iron core 44 is regulated by abutting on the left peripheral wall of the position regulating groove 1c.

【００４８】しかして、接点２ａ，２ｂの閉極状態で
は、図１０に示すように、ラッチ突起４１ａが作動板３
３に係止され、このときばね片４８ｃのばね力が第１鉄
心４１に伝達されることによって、第１鉄心４１の位置
規制片４１ｄが器体１に設けた位置規制突起１ｂに当接
し、第１鉄心４１の主鉄心４１ｂと第２鉄心４４の主鉄
心４４ａとは下端部のみ当接させた状態に保たれる。バ
イメタル４２に過電流が通過すれば、図１１に示すよう
に、バイメタル４２の下端部が右方に変位するように撓
み、第１鉄心４１の下部が保持片４８ｆに押されて右方
に移動するからラッチ突起４１ａは作動板３３を係止し
ている状態を解除し接点２ａ，２ｂを開極させる。この
とき、第１鉄心４１が右方に移動することによって第２
鉄心４４が右方に押され、バイメタル４２の不自然な変
形が防止される。また、バイメタル４２に短絡電流が流
れたときには、図１２に示すように、第１鉄心４１が第
２鉄心４４に吸引され、ラッチ突起４１ａが作動板３３
の係止状態を解除する。他の構成および動作は第１の実
施の形態と同様である。When the contacts 2a and 2b are in the closed state, as shown in FIG.
3 at this time, the spring force of the spring piece 48c is transmitted to the first iron core 41, whereby the position restriction piece 41d of the first iron core 41 abuts on the position restriction protrusion 1b provided on the body 1. The main iron core 41b of the first iron core 41 and the main iron core 44a of the second iron core 44 are kept in a state where only the lower end portions are in contact with each other. When an overcurrent passes through the bimetal 42, as shown in FIG. 11, the lower end of the bimetal 42 bends to be displaced rightward, and the lower portion of the first iron core 41 is pushed rightward by the holding piece 48f. Therefore, the latch projection 41a releases the state in which the operation plate 33 is locked, and opens the contacts 2a and 2b. At this time, the first iron core 41 moves rightward to
The iron core 44 is pushed rightward, and unnatural deformation of the bimetal 42 is prevented. When a short-circuit current flows through the bimetal 42, the first iron core 41 is attracted to the second iron core 44 as shown in FIG.
Release the locked state of. Other configurations and operations are the same as those of the first embodiment.

【００４９】（第４の実施の形態）上述した実施形態で
はバイメタル４２の上端部を固定端としていたが、本実
施形態では、図１４ないし図１６に示すように、刃受ば
ね５２ｃから延長形成されてバイメタル固定板５３にバ
イメタルの下端部を固定した構成としている。(Fourth Embodiment) In the above embodiment, the upper end of the bimetal 42 is a fixed end, but in this embodiment, as shown in FIGS. 14 to 16, it is formed to extend from the blade receiving spring 52c. The lower end of the bimetal is fixed to the bimetal fixing plate 53.

【００５０】本実施形態の引外し装置４は、断面コ字状
ないし断面Ｕ字状の主鉄心４４ａを有した第２鉄心４４
を用い、第１鉄心４１は平板状であって、第１鉄心４１
と第２鉄心４４との対向面の上端部を当接させ下端部を
離間させて配置してある。この状態で第１鉄心４１およ
び第２鉄心４４は板ばねよりなる取付保持ばね４８によ
り連結される。ここに、取付保持ばね４８の形状は第３
の実施の形態で用いたものとほぼ同様の形状に形成され
ている。The tripping device 4 of the present embodiment comprises a second iron core 44 having a main iron core 44a having a U-shaped or U-shaped cross section.
The first iron core 41 has a flat plate shape, and the first iron core 41
The upper end of the surface facing the second iron core 44 is in contact with the lower end, and the lower end is spaced apart. In this state, the first iron core 41 and the second iron core 44 are connected by an attachment holding spring 48 formed of a leaf spring. Here, the shape of the attachment holding spring 48 is the third
It is formed in almost the same shape as that used in the embodiment.

【００５１】すなわち、取付保持ばね４８は、バイメタ
ル４２の上端部（自由端）に重複する固定片４８ａを備
え、固定片４８ａの両側縁にはバイメタル４２に設けた
切欠溝４２ａに係合してかしめ固定されるかしめ片４８
ｂが設けられる。固定片４８ａからはＬ字状のばね片４
８ｃが延設され、ばね片４８ｃの下端縁には第１鉄心４
１の主片４１ｂの上面に沿った受け片４８ｄが延長され
る。また、受け片４８ｄの先端縁からは下方に押さえ片
４８ｅが延長される。受け片４８ｄには押さえ片４８ｅ
との間で第１鉄心４１の主鉄心４１ｂを保持する保持片
４８ｆが下方に向かって延長され、さらに保持片４８ｆ
の下端部からは、第２鉄心４４の主鉄心４４ａの外側面
に当接する一対の抱え片４８ｇが延長される。さらに各
抱え片４８ｇの先端部には第２鉄心４４の主鉄心４４ａ
の外側面に設けた固定溝４４ｅに係合してかしめ固定さ
れるかしめ片４８ｈが設けられる。That is, the mounting and holding spring 48 has a fixed piece 48a that overlaps the upper end (free end) of the bimetal 42, and engages with the cutout grooves 42a provided in the bimetal 42 on both side edges of the fixed piece 48a. The caulking piece 48 which is fixed by caulking
b is provided. An L-shaped spring piece 4 is provided from the fixing piece 48a.
8c is extended, and the first iron core 4 is attached to the lower end edge of the spring piece 48c.
The receiving piece 48d along the upper surface of the one main piece 41b is extended. The holding piece 48e extends downward from the leading edge of the receiving piece 48d. The holding piece 48e is attached to the receiving piece 48d.
The holding piece 48f holding the main iron core 41b of the first iron core 41 is extended downward, and the holding piece 48f is further extended.
A pair of holding pieces 48g abutting on the outer surface of the main iron core 44a of the second iron core 44 extend from the lower end of the second iron core 44. Further, the main iron core 44a of the second iron core 44 is provided at the tip of each holding piece 48g.
A caulking piece 48h is provided which engages with the fixing groove 44e provided on the outer side surface of the member and is caulked and fixed.

【００５２】したがって、第１鉄心４１と第２鉄心４４
とバイメタル４２とが取付保持ばね４８を介して一体に
結合されることになる。また、ばね片４８ｃのばね力を
押さえ片４８ｅから第１鉄心４１に伝達することによっ
て、第１鉄心４１の下端部を図の左方に倒す向きのばね
力を与え、またばね片４８ｃは第２鉄心４４の下端部も
図の左方に倒す向き（つまり、第１鉄心４１に近付ける
向き）のばね力を与える。第２鉄心４４の下面には位置
規制突起４４ｃが突設され、この位置規制突起４４ｃは
位置規制部として器体１に設けた位置規制突起１ｅに当
接することによって、第２鉄心４４の下端部の左方向へ
の移動が規制される。Therefore, the first iron core 41 and the second iron core 44
And the bimetal 42 are integrally connected via the attachment holding spring 48. Further, by transmitting the spring force of the spring piece 48c from the holding piece 48e to the first iron core 41, a spring force in a direction in which the lower end of the first iron core 41 is tilted leftward in the drawing is given. The lower end of the second iron core 44 also applies a spring force in a direction in which it is tilted leftward in the drawing (that is, a direction in which it approaches the first iron core 41). The lower surface of the second iron core 44 is provided with a position restricting protrusion 44c which is in contact with a position restricting protrusion 1e provided on the body 1 as a position restricting portion. Is restricted from moving to the left.

【００５３】しかして、接点２ａ，２ｂの閉極状態で
は、図１４に示すように、ラッチ突起４１ａが作動板３
３に係止され、このときばね片４８ｃのばね力が第１鉄
心４１に伝達されることによって、第１鉄心４１の位置
規制片４１ｄが器体１に設けた位置規制突起１ｂに当接
し、第１鉄心４１の主鉄心４１ｂと第２鉄心４４の主鉄
心４４ａとは上端部のみ当接させた状態に保たれる。バ
イメタル４２に過電流が通過すれば、図１５に示すよう
に、バイメタル４２の上端部が右方に変位するように撓
み、第１鉄心４１の上部が保持片４８ｆに押されて右方
に移動するからラッチ突起４１ａは作動板３３を係止し
ている状態を解除し接点２ａ，２ｂを開極させる。この
とき、第１鉄心４１が右方に移動することによって第２
鉄心４４が右方に押され、バイメタル４２の不自然な変
形が防止される。また、バイメタル４２に短絡電流が流
れたときには、図１６に示すように、第１鉄心４１が第
２鉄心４４に吸引され、ラッチ突起４１ａが作動板３３
の係止状態を解除する。他の構成および動作は第１の実
施の形態と同様である。When the contacts 2a and 2b are in the closed state, as shown in FIG.
3 at this time, the spring force of the spring piece 48c is transmitted to the first iron core 41, whereby the position restriction piece 41d of the first iron core 41 abuts on the position restriction protrusion 1b provided on the body 1. The main iron core 41b of the first iron core 41 and the main iron core 44a of the second iron core 44 are kept in contact with each other only at the upper end. If an overcurrent passes through the bimetal 42, as shown in FIG. 15, the upper end of the bimetal 42 is bent so as to be displaced rightward, and the upper part of the first iron core 41 is pushed rightward by the holding piece 48f. Therefore, the latch projection 41a releases the state in which the operation plate 33 is locked, and opens the contacts 2a and 2b. At this time, the first iron core 41 moves rightward to
The iron core 44 is pushed rightward, and unnatural deformation of the bimetal 42 is prevented. When a short-circuit current flows through the bimetal 42, the first iron core 41 is attracted to the second iron core 44, as shown in FIG.
Release the locked state of. Other configurations and operations are the same as those of the first embodiment.

【００５４】（第５の実施の形態）本実施形態で用いる
引外し装置４は、第３の実施の形態と同様に、第１の実
施の形態における保持ばねばね４３と取付ばね４５との
機能を併せ持つ取付保持ばね４９を用いるものである。
また、本実施形態では第１鉄心４１の主鉄心４１ｂは平
板状であるが下端部がＬ字状に形成されるとともに、バ
イメタル４２の下端部に当接可能な押当部４１ｈが駆動
部として延設されている。また、第２鉄心４４は主鉄心
４４ａが断面コ字状ないし断面Ｕ字状に形成されてい
る。なお、本実施形態における第２鉄心４４には位置規
制突起４４ｃは設けておらず、第１鉄心４１と第２鉄心
４４との対向部位では上端部を当接させている。(Fifth Embodiment) As in the third embodiment, the tripping device 4 used in the present embodiment is a combination of the holding spring 43 and the mounting spring 45 in the first embodiment. The mounting and holding spring 49 having a function is used.
Further, in the present embodiment, the main iron core 41b of the first iron core 41 has a flat plate shape, but the lower end is formed in an L-shape, and a pressing portion 41h capable of contacting the lower end of the bimetal 42 serves as a driving portion. It has been extended. The second iron core 44 has a main iron core 44a having a U-shaped cross section or a U-shaped cross section. Note that the second iron core 44 in the present embodiment does not have the position regulating protrusion 44c, and the upper end portion of the opposing portion of the first iron core 41 and the second iron core 44 is in contact with each other.

【００５５】取付保持ばね４９は、図２０に示すよう
に、第１鉄心４１に設けたダボ（図示せず）が挿入固定
される固定孔４９ａをそれぞれ有した一対の固定片４９
ｂを備え、各固定片４９ｂから上方に向かって第１鉄心
４１との距離を広げるように傾斜した部位を有するばね
片４９ｃが延長される。各ばね片４９ｃの上端縁は第１
鉄心４１の上面に沿った連結片４９ｄにより連結され、
連結片４９ｃの両側縁からは第２鉄心４４の側面に沿っ
た一対の抱え片４９ｅが垂設され、各垂設片４９ｅの下
端部には第２鉄心４４の外側面に設けた固定溝４４ｅに
係合してかしめ固定されるかしめ片４９ｆが設けられ
る。As shown in FIG. 20, the attachment holding spring 49 has a pair of fixing pieces 49 each having a fixing hole 49a into which a dowel (not shown) provided in the first iron core 41 is inserted and fixed.
b, and a spring piece 49c having a portion that is inclined upward from each of the fixing pieces 49b so as to increase the distance from the first iron core 41 is extended. The upper edge of each spring piece 49c is the first
Connected by connecting pieces 49d along the upper surface of the iron core 41,
A pair of holding pieces 49e are provided from both side edges of the connecting piece 49c along the side surface of the second iron core 44, and a fixing groove 44e provided on an outer surface of the second iron core 44 is provided at a lower end of each of the hanging pieces 49e. And a caulking piece 49f which is fixed by caulking.

【００５６】したがって、第１鉄心４１と第２鉄心４４
とバイメタル４２とが取付保持ばね４９を介して一体に
結合され、ばね片４９ｃのばね力によってバイメタル４
２の下端部に第１鉄心４１の押当部４１ｈが当接した状
態に保たれる。また、ばね片４９ｃのばね力により第１
鉄心４１の上端部である位置規制片４１ｄが器体１に設
けた位置規制突起１ｂに当接する。Therefore, the first iron core 41 and the second iron core 44
And the bimetal 42 are integrally connected via an attachment holding spring 49, and the bimetal 4 is
The pressing portion 41h of the first iron core 41 is kept in contact with the lower end of the second iron core 41. Also, the first force is generated by the spring force of the spring piece 49c.
The position restricting piece 41d, which is the upper end of the iron core 41, contacts the position restricting protrusion 1b provided on the body 1.

【００５７】しかして、接点２ａ，２ｂの閉極状態で
は、図１７に示すように、ラッチ突起４１ａが作動板３
３に係止され、このときばね片４９ｃのばね力が第１鉄
心４１に伝達されることによって、第１鉄心４１の位置
規制片４１ｄが器体１に設けた位置規制突起１ｂに当接
し、バイメタル４２の下端部が第１鉄心４１に設けた押
当部４１ｈに当接した状態に保たれる。このとき、第１
鉄心４１と第２鉄心４４との対向面では上端部のみが当
接した状態（下端部は開いた状態）に保たれる。バイメ
タル４２に過電流が通過すれば、図１８に示すように、
バイメタル４２の下端部が右方に変位するように撓み、
第１鉄心４１の下端部に設けた押当部４１ｈがバイメタ
ル４２に押圧されることによって右方に移動するからラ
ッチ突起４１ａは作動板３３を係止している状態を解除
し接点２ａ，２ｂを開極させる。このとき、第１鉄心４
１が右方に移動することによって第２鉄心４４が右方に
押され、バイメタル４２の塑性変形が防止される。ま
た、バイメタル４２に短絡電流が流れたときには、図１
９に示すように、第１鉄心４１が第２鉄心４４に吸引さ
れ、ラッチ突起４１ａが作動板３３の係止状態を解除す
る。他の構成および動作は第１の実施の形態と同様であ
る。When the contacts 2a and 2b are in the closed state, as shown in FIG.
3 and the spring force of the spring piece 49c is transmitted to the first iron core 41 at this time, whereby the position restriction piece 41d of the first iron core 41 abuts on the position restriction protrusion 1b provided on the body 1. The lower end of the bimetal 42 is kept in contact with the pressing portion 41h provided on the first iron core 41. At this time, the first
In the opposing surface of the iron core 41 and the second iron core 44, only the upper end is kept in contact (the lower end is open). If an overcurrent passes through the bimetal 42, as shown in FIG.
The lower end of the bimetal 42 flexes to be displaced rightward,
Since the pressing portion 41h provided at the lower end of the first iron core 41 is moved rightward by being pressed by the bimetal 42, the latch projection 41a releases the state in which the operating plate 33 is locked, and the contacts 2a, 2b Is opened. At this time, the first iron core 4
By moving 1 to the right, the second iron core 44 is pushed to the right, and plastic deformation of the bimetal 42 is prevented. When a short-circuit current flows through the bimetal 42,
As shown in FIG. 9, the first iron core 41 is attracted to the second iron core 44, and the latch projection 41a releases the locked state of the operation plate 33. Other configurations and operations are the same as those of the first embodiment.

【００５８】（第６の実施の形態）第５の実施の形態で
は第２鉄心４４が可動になっているが、本実施形態は図
２１ないし図２３に示すように、第２鉄心４４をバイメ
タル固定板５３に固定したものである。したがって、図
２４に示すように、取付保持ばね４９における抱え片４
９ｅが第５の実施の形態よりも長くなっている。他の構
成は第５の実施の形態と同様である。(Sixth Embodiment) In the fifth embodiment, the second iron core 44 is movable. However, in the present embodiment, as shown in FIGS. It is fixed to a fixing plate 53. Therefore, as shown in FIG.
9e is longer than in the fifth embodiment. Other configurations are the same as those of the fifth embodiment.

【００５９】しかして、接点２ａ，２ｂの閉極状態で
は、図２１に示すように、ラッチ突起４１ａが作動板３
３に係止され、このときばね片４９ｃのばね力が第１鉄
心４１に伝達されることによって、第１鉄心４１の位置
規制片４１ｄが器体１に設けた位置規制突起１ｂに当接
し、バイメタル４２の下端部が第１鉄心４１に設けた押
当部４１ｈに当接した状態に保たれる。このとき、第１
鉄心４１と第２鉄心４４との対向面では上端部のみが当
接した状態（下端部は開いた状態）に保たれる。バイメ
タル４２に過電流が通過すれば、図２２に示すように、
バイメタル４２の下端部が右方に変位するように撓み、
第１鉄心４１の下端部に設けた押当部４１ｈがバイメタ
ル４２に押圧されることによって右方に移動するからラ
ッチ突起４１ａは作動板３３を係止している状態を解除
し接点２ａ，２ｂを開極させる。また、バイメタル４２
に短絡電流が流れたときには、図２３に示すように、第
１鉄心４１が第２鉄心４４に吸引され、ラッチ突起４１
ａが作動板３３の係止状態を解除する。他の構成および
動作は第１の実施の形態と同様である。When the contacts 2a and 2b are closed, as shown in FIG.
3 and the spring force of the spring piece 49c is transmitted to the first iron core 41 at this time, whereby the position restriction piece 41d of the first iron core 41 abuts on the position restriction protrusion 1b provided on the body 1. The lower end of the bimetal 42 is kept in contact with the pressing portion 41h provided on the first iron core 41. At this time, the first
In the opposing surface of the iron core 41 and the second iron core 44, only the upper end is kept in contact (the lower end is open). If an overcurrent passes through the bimetal 42, as shown in FIG.
The lower end of the bimetal 42 flexes to be displaced rightward,
Since the pressing portion 41h provided at the lower end of the first iron core 41 is moved rightward by being pressed by the bimetal 42, the latch projection 41a releases the state in which the operating plate 33 is locked, and the contacts 2a, 2b Is opened. Also, bimetal 42
23, the first iron core 41 is attracted to the second iron core 44, and the latch protrusion 41, as shown in FIG.
“a” releases the locked state of the operation plate 33. Other configurations and operations are the same as those of the first embodiment.

【００６０】（第７の実施の形態）本実施形態で用いる
引外し装置４は図２５ないし図２７に示す構成を有して
いる。本実施形態で用いる第１鉄心４１は断面コ字状な
いし断面Ｕ字状の主鉄心４１ｂの上方に軸支部４１ｉを
有し、軸支部４１ｉが器体１に軸支されて第１鉄心４１
の下部が図の左右に移動可能になっている。また、第１
鉄心４１の主鉄心４１ｂの下方には第５の実施の形態と
同様にバイメタル４２の下端部に当接可能な駆動部とし
ての押当部４１ｈが延設される。一方、第２鉄心４４は
平板状の主鉄心４４ａの下方に軸支部４４ｆを備え、軸
支部４４ｆが器体１に軸支される。また、軸支部４４ｆ
の回りにはねじりコイルばねからなる復帰ばね６１が設
けられ、第２鉄心４４を図における反時計方向に付勢し
ている。この復帰ばね６１によるばね力は第２鉄心４４
を介して第１鉄心４１にも伝達され、第１鉄心４１を軸
支部４４ｆよりも下方で押圧するから、第１鉄心４１の
下部を図の左方に付勢することになる。ここに、第１鉄
心４１の下端部は器体１の内周面に設けた位置規制凸部
１ｄに当接することで移動範囲が規制される。また、第
１鉄心４１の下部が位置規制凸部１ｄに当接していると
きに、第１鉄心４１の主鉄心４１ｂと第２鉄心４４の主
鉄心４４ａとの対向面は上端部のみ接触し下端部は離間
する。(Seventh Embodiment) The tripping device 4 used in this embodiment has the structure shown in FIGS. The first iron core 41 used in the present embodiment has a shaft support 41i above a main iron core 41b having a U-shaped cross section or a U-shaped cross section.
Can be moved left and right in the figure. Also, the first
Below the main iron core 41b of the iron core 41, a pressing part 41h as a driving part capable of abutting on the lower end part of the bimetal 42 is extended as in the fifth embodiment. On the other hand, the second iron core 44 has a shaft support 44f below the flat main core 44a, and the shaft support 44f is supported by the body 1. Also, the shaft support 44f
A return spring 61 formed of a torsion coil spring is provided around the coil, and urges the second iron core 44 in a counterclockwise direction in the drawing. The spring force of the return spring 61 is applied to the second iron core 44.
Is transmitted to the first iron core 41 via the first iron core 41, and presses the first iron core 41 below the shaft supporting portion 44f, so that the lower part of the first iron core 41 is urged to the left in the drawing. Here, the lower end portion of the first iron core 41 abuts on the position regulating protrusion 1 d provided on the inner peripheral surface of the container body 1, so that the movement range is regulated. When the lower part of the first iron core 41 is in contact with the position regulating protrusion 1d, the opposing surfaces of the main iron core 41b of the first iron core 41 and the main iron core 44a of the second iron core 44 contact only the upper end part and the lower end part. The parts are separated.

【００６１】しかして、接点２ａ，２ｂの閉極状態で
は、図２５に示すように、ラッチ突起４１ａが作動板３
３に係止され、このとき復帰ばね６１のばね力が第２鉄
心４４を介して第１鉄心４１に伝達されることによっ
て、第１鉄心４１の下部が器体１に設けた位置規制凸部
１ｄに当接した状態に保たれる。また、この状態におい
てバイメタル４２の下端部は第１鉄心４１に設けた押当
部４１ｈに当接し、第１鉄心４１と第２鉄心４４との対
向面では上端部のみが当接した状態（下端部は開いた状
態）に保たれる。バイメタル４２に過電流が通過すれ
ば、図２６に示すように、バイメタル４２の下端部が右
方に変位するように撓み、第１鉄心４１の下端部に設け
た押当部４１ｈがバイメタル４２に押圧されることによ
って右方に移動するからラッチ突起４１ａは作動板３３
を係止している状態を解除し接点２ａ，２ｂを開極させ
る。このとき、第１鉄心４１が右方に移動することによ
って第２鉄心４４が右方に押され、バイメタル４２の塑
性変形が防止される。また、バイメタル４２に短絡電流
が流れたときには、図２７に示すように、第１鉄心４１
が第２鉄心４４に吸引され、ラッチ突起４１ａが作動板
３３の係止状態を解除する。なお、第１鉄心４１の移動
範囲は器体１に設けた位置規制突起１ｅにより規制され
る。他の構成および動作は第１の実施の形態と同様であ
る。When the contacts 2a and 2b are closed, as shown in FIG.
3 at this time, the spring force of the return spring 61 is transmitted to the first iron core 41 via the second iron core 44, so that the lower part of the first iron core 41 is provided with the position regulating projection provided on the body 1. It is kept in contact with 1d. In this state, the lower end of the bimetal 42 contacts the pressing portion 41h provided on the first core 41, and only the upper end contacts the opposing surface of the first core 41 and the second core 44 (the lower end). Section is kept open). When an overcurrent passes through the bimetal 42, as shown in FIG. 26, the lower end of the bimetal 42 bends to be displaced rightward, and the pressing portion 41h provided at the lower end of the first iron core 41 The latch projection 41a moves to the right by being pressed, so that the operation plate 33
Is released and the contacts 2a and 2b are opened. At this time, the second iron core 44 is pushed rightward by the first iron core 41 moving rightward, and the plastic deformation of the bimetal 42 is prevented. When a short-circuit current flows through the bimetal 42, as shown in FIG.
Is attracted to the second iron core 44, and the latch projection 41a releases the locked state of the operation plate 33. The range of movement of the first iron core 41 is regulated by the position regulating protrusion 1e provided on the case 1. Other configurations and operations are the same as those of the first embodiment.

【００６２】（第８の実施の形態）本実施形態で用いる
引外し装置４は図２８ないし図３０に示す構成を有して
いる。本実施形態で用いる第１鉄心４１は第５の実施の
形態と同様に下部がＬ字状に形成されるとともにバイメ
タル４２の下端部に当接可能な押当部４１ｈを備える。
一方、第２鉄心４４は主鉄心４４ａが断面コ字状ないし
断面Ｕ字状に形成され、主鉄心４４ａの下面側には位置
規制突起４４ｃが突設されている。この位置規制突起４
４ｃは器体１の内周面に設けた位置規制突起１ｅによっ
て図の左方への移動が規制されている。バイメタル４２
は上端部がＬ字状に折曲されており、バイメタル４２に
対向する固定電路としてのバイメタル固定板５３に設け
た固定片５３ａの下面側に固着される。固定片５３ａに
は第１鉄心４１と第２鉄心とを連結するための取付ばね
４５に設けたＬ字状の固定片４５ｇが図の点Ｘにおいて
固着される。取付ばね４５の固定片４５ｇの下部は第１
鉄心４１の上端部に図の点Ｙにおいて固着される。固定
片４５ｇの下端部からは第２鉄心４４の外側面に当接す
る一対の抱え片４５ｅが延長され、抱え片４５ｅの先端
部には第２鉄心４４に設けた固定溝４４ｅにかしめ固定
されるかしめ片４５ｆが形成されている。取付ばね４５
は第１鉄心４１の下部を図の左向きに付勢しており、第
１鉄心４１の下部は器体１に設けた位置規制凸部１ｄに
より左方への移動が規制される。(Eighth Embodiment) A trip unit 4 used in this embodiment has a configuration shown in FIGS. The first iron core 41 used in the present embodiment has an L-shaped lower portion similarly to the fifth embodiment, and includes a pressing portion 41h that can contact the lower end portion of the bimetal 42.
On the other hand, the second iron core 44 has a main iron core 44a formed in a U-shaped cross section or a U-shaped cross section, and a position regulating projection 44c protrudes from a lower surface of the main iron core 44a. This position regulating projection 4
4c is restricted from moving leftward in the figure by a position regulating protrusion 1e provided on the inner peripheral surface of the body 1. Bimetal 42
The upper end is bent in an L-shape, and is fixed to the lower surface side of a fixing piece 53 a provided on a bimetal fixing plate 53 as a fixing electric path facing the bimetal 42. An L-shaped fixing piece 45g provided on a mounting spring 45 for connecting the first iron core 41 and the second iron core is fixed to the fixing piece 53a at a point X in the drawing. The lower part of the fixing piece 45g of the mounting spring 45 is the first
It is fixed to the upper end of the iron core 41 at a point Y in the figure. A pair of holding pieces 45e abutting on the outer surface of the second core 44 extend from the lower end of the fixing piece 45g, and are caulked and fixed to a fixing groove 44e provided in the second iron core 44 at the tip of the holding piece 45e. A swaging piece 45f is formed. Mounting spring 45
Urges the lower part of the first iron core 41 leftward in the figure, and the lower part of the first iron core 41 is restricted from moving leftward by the position restricting projection 1 d provided on the body 1.

【００６３】本実施形態の構成では、第１鉄心４１と第
２鉄心４４とが取付ばね４５を介して一体に結合され、
取付ばね４５とバイメタル４２とがバイメタル固定板５
３に固着されることによって、バイメタル４２と第１鉄
心４１と第２鉄心４４とが一体化されていることにな
る。In the configuration of this embodiment, the first iron core 41 and the second iron core 44 are integrally connected via the mounting spring 45,
The mounting spring 45 and the bimetal 42 are fixed to the bimetal fixing plate 5.
By being fixed to 3, the bimetal 42, the first iron core 41, and the second iron core 44 are integrated.

【００６４】しかして、接点２ａ，２ｂの閉極状態で
は、図２８に示すように、ラッチ突起４１ａが作動板３
３に係止され、このとき取付ばね４５のばね力により第
１鉄心４１の下部が図の左方に付勢され、第１鉄心４１
の下部が位置規制凸部１ｄに当接するとともに、第２鉄
心４４が第１鉄心４１寄りに引きつけられ、第２鉄心４
４が位置規制突起１ｅに当接する。この状態において第
１鉄心４１と第２鉄心４４との対向面では上端部のみが
当接した状態（下端部は開いた状態）に保たれる。バイ
メタル４２に過電流が通過すれば、図２９に示すよう
に、バイメタル４２の下端部が右方に変位するように撓
み、第１鉄心４１の下端部に延設された駆動部としての
押当部４１ｈがバイメタル４２に押圧されることによっ
て右方に移動するからラッチ突起４１ａは作動板３３を
係止している状態を解除し接点２ａ，２ｂを開極させ
る。このとき、第１鉄心４１が右方に移動することによ
って第２鉄心４４が右方に押され、バイメタル４２の塑
性変形が防止される。また、バイメタル４２に短絡電流
が流れたときには、図３０に示すように、第１鉄心４１
が第２鉄心４４に吸引され、ラッチ突起４１ａが作動板
３３の係止状態を解除する。他の構成および動作は第１
の実施の形態と同様である。When the contacts 2a and 2b are closed, as shown in FIG.
3 at this time, the lower part of the first iron core 41 is urged leftward in the figure by the spring force of the mounting spring 45, and the first iron core 41
Abuts against the position regulating protrusion 1d, the second core 44 is attracted toward the first core 41, and the second core 4
4 comes into contact with the position regulating protrusion 1e. In this state, only the upper end of the opposing surface of the first iron core 41 and the second iron core 44 is kept in contact (the lower end is open). When an overcurrent passes through the bimetal 42, as shown in FIG. 29, the lower end of the bimetal 42 is bent so as to be displaced rightward, and the pressing as a drive unit extended to the lower end of the first iron core 41 is performed. Since the portion 41h is moved rightward by being pressed by the bimetal 42, the latch projection 41a releases the state in which the operation plate 33 is locked, and opens the contacts 2a and 2b. At this time, the second iron core 44 is pushed rightward by the first iron core 41 moving rightward, and the plastic deformation of the bimetal 42 is prevented. When a short-circuit current flows through the bimetal 42, as shown in FIG.
Is attracted to the second iron core 44, and the latch projection 41a releases the locked state of the operation plate 33. Other configurations and operations are the first
This is the same as the embodiment.

【００６５】（第９の実施の形態）本実施形態で用いる
引外し装置４は図３１ないし図３３に示す構成を有して
いる。本実施形態では第６の実施の形態と同様に、第２
鉄心４４をバイメタル固定板５３に固定した構成を採用
している。また、第１鉄心４１は平板状であって上端部
のみが第２鉄心４４と当接するように配置してある。第
１鉄心４１の上端部の両側面には器体１の内周面に形成
された左右方向に長い長溝状の軸受部１ｆに支承される
軸４１ｊが突設され、回動自在でかつ軸受部１ｆの範囲
内で移動自在になっている。さらに第１鉄心４１の上端
部はコイルばねよりなる復帰ばね６２に付勢されて、第
２鉄心４４に押し付けられている。(Ninth Embodiment) The tripping device 4 used in this embodiment has the structure shown in FIGS. In the present embodiment, as in the sixth embodiment, the second
A configuration in which the iron core 44 is fixed to the bimetal fixing plate 53 is employed. Further, the first iron core 41 has a flat plate shape and is arranged such that only the upper end portion is in contact with the second iron core 44. On both side surfaces of the upper end portion of the first iron core 41, shafts 41j supported by long longitudinal groove-shaped bearing portions 1f formed on the inner peripheral surface of the container body 1 are projected, and are rotatable and bearing. It is movable within the range of the part 1f. Further, the upper end of the first iron core 41 is urged by a return spring 62 formed of a coil spring and pressed against the second iron core 44.

【００６６】第１鉄心４１の下部にはバイメタル４２の
下端部（自由端）が当接可能な押当部４１ｈが設けられ
ており、押当部４１ｈは器体１との間に保持されたコイ
ルばねよりなる復帰ばね６３によってバイメタル４２に
押し当てられるように付勢されている。したがって、第
１鉄心４１は上端部が第２鉄心４４の主鉄心４４ａの上
端部に当接し、当接部位よりも下部では主鉄心４４ａと
第１鉄心４１とが離間した形になる。At the lower part of the first iron core 41, there is provided a pressing portion 41h to which the lower end portion (free end) of the bimetal 42 can be abutted, and the pressing portion 41h is held between the bimetal 42 and the body 1. It is urged so as to be pressed against the bimetal 42 by a return spring 63 composed of a coil spring. Therefore, the first core 41 has an upper end in contact with the upper end of the main core 44a of the second core 44, and the main core 44a and the first iron core 41 are separated below the contact portion.

【００６７】しかして、接点２ａ，２ｂの閉極状態で
は、図３１に示すように、ラッチ突起４１ａが作動板３
３に係止され、このとき復帰ばね６３のばね力により第
１鉄心４１の下部がバイメタル４２に押し当てられ、第
１鉄心４１の上部が復帰ばね６２により第２鉄心４４に
当接した状態に保たれる。この状態において第１鉄心４
１と第２鉄心４４との対向面では上端部のみが当接した
状態（下端部は開いた状態）に保たれる。バイメタル４
２に過電流が通過すれば、図３２に示すように、バイメ
タル４２の下端部が右方に変位するように撓み、駆動部
としての押当部４１ｈがバイメタル４２に押圧されるこ
とによって右方に移動するから、ラッチ突起４１ａは作
動板３３を係止している状態を解除し接点２ａ，２ｂを
開極させる。このとき、第１鉄心４１の下端部により復
帰ばね６３が押圧されて圧縮される。また、バイメタル
４２に短絡電流が流れたときには、図３３に示すよう
に、第１鉄心４１が第２鉄心４４に吸引され、ラッチ突
起４１ａが作動板３３の係止状態を解除する。他の構成
および動作は第１の実施の形態と同様である。When the contacts 2a and 2b are in the closed state, as shown in FIG.
3 at this time, the lower part of the first iron core 41 is pressed against the bimetal 42 by the spring force of the return spring 63, and the upper part of the first iron core 41 is brought into contact with the second iron core 44 by the return spring 62. Will be kept. In this state, the first iron core 4
On the opposing surface of the first and second cores 44, only the upper end is kept in contact (the lower end is open). Bimetal 4
32, the lower end of the bimetal 42 is bent so as to be displaced rightward as shown in FIG. 32, and the pressing portion 41h as a driving unit is pressed by the bimetal 42 so that , The latch projection 41a releases the state in which the operation plate 33 is locked, and the contacts 2a and 2b are opened. At this time, the return spring 63 is pressed and compressed by the lower end of the first iron core 41. When a short-circuit current flows through the bimetal 42, as shown in FIG. 33, the first iron core 41 is attracted to the second iron core 44, and the latch projection 41a releases the locked state of the operation plate 33. Other configurations and operations are the same as those of the first embodiment.

【００６８】[0068]

【発明の効果】請求項１の発明は、電源と負荷との間の
通電電路に挿入された接点と、接点の閉極時に接点を開
極する向きの力を蓄えて係止状態とし係止状態が解除さ
れると前記力により接点を強制開極させる開閉機構とを
器体に備える回路遮断器に用いられ、接点の閉極時に大
電流が前記通電電路に流れると前記係止状態を解除して
接点を強制開極させる引外し装置であって、一対の側片
の一端間を一体に連結した形状の一方の主鉄心との間で
前記通電電路の一部を囲繞するように配設されて一端側
を前記一方の主鉄心の２つの側片に当接させるとともに
他端側を前記一方の主鉄心の２つの側片から離間させた
状態で保持される他方の主鉄心とをそれぞれ備える第１
鉄心および第２鉄心を備え、第１鉄心と第２鉄心との一
方に一体形成されて開閉機構を係止状態とする係止部を
設け、通電電路に大電流が流れると第１鉄心と第２鉄心
との離間側を吸着させて開閉機構と係止部との係止状態
を解除することにより接点を強制開極させるものであ
り、一方の主鉄心の２つの側片に他方の主鉄心の一端側
が当接しているので、電磁吸引力が大きくなり、各鉄心
の大きさを小さくできる。また、係止部を第１鉄心また
は第２鉄心に一体形成しているので、これら鉄心とは別
体の係止部材を必要とせず、部品点数を少なくすること
ができる。その結果、組立性が向上し、小型化が図れる
とともに第１鉄心および第２鉄心間の吸引力を強くする
ことができる。According to the first aspect of the present invention, a contact inserted into an energizing circuit between a power supply and a load, and a force in a direction of opening the contact when the contact is closed are stored in a locked state to be locked. Used in a circuit breaker having an opening / closing mechanism for forcibly opening a contact by the force when the state is released, which is used in a circuit breaker, and releasing the locked state when a large current flows through the current path when the contact is closed. A trip device for forcibly opening contacts by disposing a part of the current-carrying path between one end of a pair of side pieces and one main core having a shape integrally connected. And the other main core held in a state where one end side is in contact with the two side pieces of the one main core and the other end side is separated from the two side pieces of the one main core. First
A locking portion is provided which includes an iron core and a second iron core, and is integrally formed on one of the first iron core and the second iron core so as to lock the opening / closing mechanism. (2) The contact point is forcibly opened by releasing the locked state between the opening / closing mechanism and the locking portion by attracting the side away from the core and forcibly opening the contact. Two side pieces of one main core are connected to the other main core. Since one end of the core is in contact, the electromagnetic attraction force is increased, and the size of each iron core can be reduced. Further, since the locking portion is formed integrally with the first core or the second core, a separate locking member is not required from these cores, and the number of parts can be reduced. As a result, assemblability is improved, the size can be reduced, and the suction force between the first core and the second core can be increased.

【００６９】請求項２の発明は、請求項１の発明におい
て、前記通電電路を過電流によって自由端側が変位する
バイメタルとし、バイメタルの自由端側に前記係止部を
備えた第１鉄心または第２鉄心をバイメタルの変位によ
って前記係止部と前記開閉機構との係止状態を解除する
方向として連結する板ばねよりなる保持ばねを設けたも
のであり、過電流が流れるとバイメタルが変位し、この
バイメタルの変位によって保持ばねを介して係止部を有
する第１鉄心または第２鉄心が駆動され、開閉機構の一
部を係止部から解除して接点を強制開極することができ
る。According to a second aspect of the present invention, in the first aspect of the present invention, the energizing circuit is formed of a bimetal whose free end is displaced by an overcurrent, and the first iron core or the second core having the locking portion on the free end of the bimetal. (2) A holding spring composed of a plate spring that connects the iron core as a direction for releasing the locking state between the locking portion and the opening / closing mechanism by the displacement of the bimetal is provided. When an overcurrent flows, the bimetal is displaced, This displacement of the bimetal drives the first iron core or the second iron core having the locking portion via the holding spring, so that a part of the opening / closing mechanism is released from the locking portion and the contact can be forcibly opened.

【００７０】請求項３の発明は、請求項２の発明におい
て、前記バイメタルの自由端側を、開閉機構の一部が係
止部に係止された状態でその係止力が働く方向として配
設したものであり、過電流が流れたときに、バイメタル
の固定端を支点としてバイメタルの自由端側が開閉機構
の一部の係止力を弱める方向で係止部から開閉機構の一
部を解除する方向に回転するので、素早く解除すること
ができる。According to a third aspect of the present invention, in the second aspect of the present invention, the free end side of the bimetal is arranged in a direction in which the locking force acts when a part of the opening / closing mechanism is locked in the locking portion. When the overcurrent flows, the free end of the bimetal releases the part of the opening / closing mechanism from the locking part in the direction to weaken the locking force of the part of the opening / closing mechanism with the fixed end of the bimetal as a fulcrum. It can be released quickly because it rotates in the direction of

【００７１】請求項４の発明は、請求項２の発明におい
て、前記バイメタルの自由端側を、開閉機構の一部が係
止部に係止された状態でその係止力が働かない方向とし
て配設したものであり、過電流が流れたときに、バイメ
タルの固定端を支点としてバイメタルの自由端側が開閉
機構の一部の係止力を強める方向で係止部から開閉機構
の一部を解除する方向に回転するので、開閉機構の一部
を係止部に確実に係止させ易くできる。According to a fourth aspect of the present invention, in the second aspect of the present invention, the free end side of the bimetal is set to a direction in which the locking force does not work when a part of the opening and closing mechanism is locked by the locking portion. When an overcurrent flows, the free end side of the bimetal uses the fixed end of the bimetal as a fulcrum to move a part of the opening / closing mechanism from the locking part in a direction to increase the locking force of a part of the opening / closing mechanism. Since the rotation is performed in the releasing direction, a part of the opening / closing mechanism can be easily locked to the locking portion.

【００７２】請求項５の発明は、請求項２ないし請求項
４の発明において、前記第１鉄心と前記第２鉄心とを連
結するとともに第１鉄心および第２鉄心の離間側で係止
部が非形成な第２鉄心または第１鉄心を係止部が形成さ
れた第１鉄心または第２鉄心側として付勢する板ばねよ
りなる取付ばねを設け、取付ばねによって付勢された係
止部が非形成な第２鉄心または第１鉄心の係止部が形成
された第１鉄心または第２鉄心との対向面側に当接する
移動規制部を器体に設けたものであり、短絡電流等の大
電流が流れると、バイメタルを基端として取付ばねの弾
性力で係止部が形成された第１鉄心または第２鉄心が、
係止部が非形成な第２鉄心または第１鉄心側に移動し、
開閉機構の一部を係止部から解除して接点を強制開極さ
せることができる。また、過電流が流れると、バイメタ
ルの変位にともなってバイメタルとともに第１鉄心およ
び第２鉄心の両方が移動することとなり、もってバイメ
タルの反りを防止し、過電流引外し特性のばらつきを抑
えることができる。According to a fifth aspect of the present invention, in the second aspect of the present invention, the first core and the second core are connected to each other, and a locking portion is provided on a side away from the first core and the second core. A mounting spring composed of a plate spring that urges the non-formed second core or the first iron core as the first core or the second core having the locking portion is provided, and the locking portion urged by the mounting spring is provided. The body is provided with a movement restricting portion which is in contact with a surface of the non-formed second core or the first core on which the engaging portion of the first core or the first core is formed. When a large current flows, the first iron core or the second iron core having the locking portion formed by the elastic force of the mounting spring with the bimetal as the base end,
The locking portion moves toward the non-formed second core or the first core,
The contact can be forcibly opened by releasing a part of the opening / closing mechanism from the locking portion. In addition, when an overcurrent flows, both the first and second cores move together with the bimetal along with the displacement of the bimetal, thereby preventing warping of the bimetal and suppressing variation in overcurrent tripping characteristics. it can.

【００７３】請求項６の発明は、請求項１または請求項
３または請求項４の発明において、前記通電電路を過電
流によって自由端側が変位するバイメタルとし、バイメ
タルの自由端側に前記係止部を備えた第１鉄心または第
２鉄心をバイメタルの変位によって前記係止部と前記開
閉機構との係止状態を解除する方向として連結するとと
もに前記第１鉄心と前記第２鉄心とを連結し、かつ第１
鉄心および第２鉄心の離間側で係止部が非形成な第２鉄
心または第１鉄心を係止部が形成された第１鉄心または
第２鉄心側として付勢する板ばねよりなる取付保持ばね
を設け、取付保持ばねによって付勢された係止部が非形
成な第２鉄心または第１鉄心の係止部が形成された第１
鉄心または第２鉄心との対向面側に当接する移動規制部
を器体に設けたものであり、保持ばねと取付ばねとの機
能を一体化した取付保持ばねを用いるから、部品点数を
削減して組立性を向上させることができる。According to a sixth aspect of the present invention, in the first, third or fourth aspect of the present invention, the energizing circuit is a bimetal whose free end is displaced by an overcurrent, and the locking portion is provided on the free end of the bimetal. A first iron core or a second iron core provided with a first metal core and a second iron core, the first metal core and the second iron core being connected by a bimetal displacement as a direction in which a locking state between the locking portion and the opening / closing mechanism is released; And the first
A mounting and holding spring comprising a leaf spring for urging the second or first core having no locking portion on the side away from the core and the second core as the first or second core having the locking portion. And a first core having a second core or a first core formed with no locking portion urged by the attachment holding spring.
A movement restricting portion is provided on the body to abut on the side facing the iron core or the second iron core. Since the mounting and holding spring integrated with the functions of the holding spring and the mounting spring is used, the number of parts can be reduced. The assemblability can be improved.

【００７４】請求項７の発明は、請求項２ないし請求項
４の発明において、前記係止部が非形成な第２鉄心また
は第１鉄心の係止部が形成された第１鉄心または第２鉄
心との離間側を器体に回動自在に軸支させ、係止部が非
形成な第２鉄心または第１鉄心を係止部が形成された第
１鉄心または第２鉄心方向に付勢する復帰ばねを前記器
体内に配設したものであり、短絡電流等の大電流が流れ
ると、バイメタルの自由端側を支点として復帰ばねの弾
性力でもって係止部が形成された第１鉄心または第２鉄
心が復帰ばねのばね力に逆らって係止部が非形成な第２
鉄心または第１鉄心側に回転することとなり、開閉機構
の一部を係止部から解除して接点を強制開極することが
できる。また、過電流が流れると、バイメタルの自由端
とともに係止部が形成された第１鉄心または第２鉄心
が、係止部が非形成な第２鉄心または第１鉄心を復帰ば
ねのばね力に逆らって駆動するので、バイメタルの反り
を防止し、過電流引外し特性のばらつきを抑えることが
できる。According to a seventh aspect of the present invention, in the second to fourth aspects of the present invention, the second iron core or the first iron core or the second iron core having the first iron core locking portion is not formed. The side away from the iron core is rotatably supported by the container, and the second core or the first iron core having no locking portion is urged toward the first core or the second core where the locking portion is formed. A return spring is disposed in the body, and when a large current such as a short-circuit current flows, a first core having a locking portion formed by the elastic force of the return spring with the free end side of the bimetal as a fulcrum. Alternatively, the second core, in which the locking portion is not formed because the second iron core is opposed to the spring force of the return spring,
As a result, the contact is rotated toward the iron core or the first iron core, and a part of the opening / closing mechanism is released from the locking portion, so that the contact can be forcibly opened. When an overcurrent flows, the first core or the second iron core having the locking portion together with the free end of the bimetal causes the second core or the first iron core having no locking portion to return to the spring force of the return spring. Since driving is performed in the opposite manner, warpage of the bimetal can be prevented, and variations in overcurrent tripping characteristics can be suppressed.

【００７５】請求項８の発明は、請求項１の発明におい
て、前記通電電路を過電流によって自由端側が変位する
バイメタルとし、前記係止部を有する第１鉄心または第
２鉄心からバイメタルの自由端側に延出してバイメタル
の変位によって係止部に係止された開閉機構部の一部を
解除する方向に駆動される駆動部を設けたものであり、
過電流が流れるとバイメタルが変位し、バイメタルで駆
動部を駆動して開閉機構部の一端を係止部から解除して
接点を強制開極することができる。According to an eighth aspect of the present invention, in the first aspect of the present invention, the energizing circuit is a bimetal whose free end is displaced by an overcurrent, and the free end of the bimetal is connected to the first or second core having the locking portion. A drive unit extending in the side and driven in a direction to release a part of the opening and closing mechanism locked by the locking unit by the displacement of the bimetal,
When an overcurrent flows, the bimetal is displaced, and the driving part is driven by the bimetal to release one end of the opening / closing mechanism from the locking part, thereby forcibly opening the contact.

【００７６】請求項９の発明は、請求項８の発明におい
て、前記第１鉄心および前記第２鉄心間を、第１鉄心と
第２鉄心との離間側を離す方向に付勢する板ばねを介し
て連結したものであり、第１鉄心および第２鉄心間を板
ばねを介して連結しているので、第１鉄心および第２鉄
心をブロック化して組み立てることができ、収納作業が
容易となる。According to a ninth aspect of the present invention, in accordance with the eighth aspect of the present invention, there is provided a leaf spring for urging the first iron core and the second iron core in a direction in which a separation side between the first iron core and the second iron core is separated. Since the first and second cores are connected via a leaf spring, the first and second cores can be assembled into a block, which facilitates the storage operation. .

【００７７】請求項１０の発明は、請求項９の発明にお
いて、前記バイメタルを連結してバイメタルに対向する
固定電路を設け、該固定電路に係止部が非形成な第２鉄
心または第１鉄心を固定したものであり、係止部が非形
成な第２鉄心または第１鉄心を、バイメタルを連結した
固定電路に固定しているので、第１鉄心および第２鉄心
に加えてバイメタルをまとめてブロック化することがで
き、請求項３の効果に加え、さらに収納作業が容易とな
る。According to a tenth aspect of the present invention, in the ninth aspect of the present invention, there is provided a fixed electric path connecting the bimetals and facing the bimetal, and wherein the fixed electric path has no second core or first core formed with no locking portion. Is fixed, and the second core or the first iron core having no locking portion is fixed to the fixed electric circuit connecting the bimetals, so that the bimetal is collectively added in addition to the first iron core and the second iron core. Blocking is possible, and in addition to the effect of the third aspect, the storing operation is further facilitated.

【００７８】請求項１１の発明は、請求項８の発明にお
いて、前記バイメタルに係止部が非形成な第２鉄心また
は第１鉄心を固着したものであり、バイメタルに係止部
が非形成な第２鉄心または第１鉄心を固着しているの
で、バイメタルの変位によって係止部が非形成な第２鉄
心または第１鉄心も同時に変位するので、バイメタルが
変位したときに係止部が非形成な第２鉄心または第１鉄
心にバイメタルが当ってバイメタルがそれ以上変位しな
くなるのを防止でき、もってバイメタタルの反りを防止
し、過電流引外し特性のばらつきを抑えることができ
る。According to an eleventh aspect of the present invention, in the invention of the eighth aspect, the second core or the first iron core having no locking portion is fixed to the bimetal, and the locking portion is not formed in the bimetal. Since the second core or the first core is fixed, the displacement of the bimetal also causes the displacement of the second core or the first core where the locking portion is not formed. Therefore, the locking portion is not formed when the bimetal is displaced. It is possible to prevent the bimetal from hitting the second or first iron core and prevent the bimetal from displacing any more, thereby preventing the bimetal from warping and suppressing the variation in overcurrent tripping characteristics.

【００７９】請求項１２の発明は、請求項８の発明にお
いて、前記係止部が形成された第１鉄心または第２鉄心
の係止部が非形成な第２鉄心または第１鉄心との当接側
を器体に回動自在に軸支させ、第１鉄心および第２鉄心
の離間側を離す方向に付勢する復帰ばねを前記器体内に
設けたものであり、軸部と軸受部によって係止部が形成
された第１鉄心または第２鉄心を器体に回動自在に軸支
させ、復帰ばねで第１鉄心と第２鉄心との離間側を離す
方向に付勢することで第１鉄心と第２鉄心との当接側を
当接させるとともに離間側を離した状態で保持すること
ができる。According to a twelfth aspect of the present invention, in the invention of the eighth aspect, the first iron core or the second iron core having the locking portion formed thereon is not in contact with the second iron core or the first iron core having no locking portion. A return spring for rotatably supporting the contact side to the body and for urging the first and second cores in a direction to separate the separated sides is provided in the body, and includes a shaft portion and a bearing portion. The first core or the second core having the locking portion is rotatably supported on the body and is urged by a return spring in a direction in which the separated side between the first core and the second core is separated. The contact side between the first iron core and the second iron core can be brought into contact with each other and can be held in a state where the separated side is separated.

【００８０】請求項１３の発明は、請求項８の発明にお
いて、前記係止部が形成された第１鉄心または第２鉄心
の係止部が非形成な第２鉄心または第１鉄心との当接側
と、係止部が非形成な第２鉄心または第１鉄心の第１鉄
心または第２鉄心との離間側とを器体に回動自在に軸支
させ、係止部が非形成な第２鉄心または第１鉄心を係止
部が形成された第１鉄心または第２鉄心方向に付勢する
復帰ばねを前記器体内に配設したものであり、短絡電流
等の大電流が流れると、復帰ばねの付勢力に逆らって係
止部が非形成な第２鉄心または第１鉄心側に、係止部が
形成された第１鉄心または第２鉄心がその軸支位置を中
心に回動する。また、過電流が流れてバイメタルが変位
すると、係止部が形成された第１鉄心または第２鉄心が
軸支位置を中心に回動するが、そのまま係止部が非形成
な第２鉄心または第１鉄心を復帰ばねのばね力に逆らっ
て駆動することができ、バイメタルの反りを防止し、過
電流引外し特性のばらつきを抑えることができる。According to a thirteenth aspect of the present invention, in the invention of the eighth aspect, the first iron core or the second iron core having the locking portion formed thereon is not in contact with the second core or the first iron core having no locking portion formed thereon. The contact side and the second core having no locking portion or the side of the first iron core separated from the first core or the second iron core are rotatably supported by the body so that the locking portion is not formed. A return spring for urging the second iron core or the first iron core in the direction of the first iron core or the second iron core provided with the locking portion is disposed in the body, and when a large current such as a short-circuit current flows. The first or second core having the locking portion is pivoted about its pivotal support position on the side of the second or first core where the locking portion is not formed against the urging force of the return spring. I do. When an overcurrent flows and the bimetal is displaced, the first core or the second iron core having the locking portion is rotated about the pivot position, but the second core or the second core having no locking portion is formed as it is. The first iron core can be driven against the spring force of the return spring, thereby preventing the bimetal from warping and suppressing the variation in overcurrent tripping characteristics.

【００８１】請求項１４の発明は、請求項８の発明にお
いて、前記バイメタルを連結してバイメタルに対向する
固定電路を設け、該固定電路と係止部が形成された第１
鉄心または第２鉄心との間と、第１鉄心および第２鉄心
の離間側で係止部が非形成な第２鉄心または第１鉄心を
係止部が形成された第１鉄心または第２鉄心側として付
勢した状態で第１鉄心と第２鉄心との間とを連結する板
ばねを設け、第２の板ばねによって付勢された係止部が
非形成な第２鉄心または第１鉄心の係止部が形成された
第１鉄心または第２鉄心との対向面側に当接する移動規
制部を器体に設けたものであり、バイメタルおよび係止
部を有した第１鉄心または第２鉄心を同一の固定電路に
連結することができ、ブロック化が図れて収納性が向上
する。According to a fourteenth aspect of the present invention, in the first aspect of the present invention, a fixed electric path is provided by connecting the bimetals, the fixed electric path being opposed to the bimetal, and the fixed electric path and the locking portion are formed.
A first iron core or a second iron core having a locking portion formed between a second iron core or a first iron core having no locking portion between the iron core or the second iron core and a side away from the first iron core and the second iron core. A plate spring for connecting the first core and the second core in a state of being urged as a side, wherein the second core or the first core in which the locking portion urged by the second plate spring is not formed; The body has a movement restricting portion that is in contact with the first iron core or the second iron core on which the locking portion is formed, and the first core or the second core having the bimetal and the locking portion. The iron core can be connected to the same fixed electric circuit, so that it can be made into a block and the storage property is improved.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の第１の実施の形態を用いた回路遮断器
における閉極状態を示す器体を開いた側面図である。FIG. 1 is a side view of a circuit breaker according to a first embodiment of the present invention, showing a closed state of the circuit breaker, showing an open state.

【図２】同上における開極状態を示す器体を開いた側面
図である。FIG. 2 is a side view showing a state where the container body is opened, showing an opened state in the same.

【図３】同上における過電流時の開極状態を示す器体を
開いた側面図である。FIG. 3 is a side view of the same device, showing an opening state at the time of overcurrent, with the body opened.

【図４】同上における短絡電流時の開極状態を示す器体
を開いた側面図である。FIG. 4 is a side view showing the open state of the above-described electrode at the time of a short-circuit current with the container opened.

【図５】同上の分解斜視図である。FIG. 5 is an exploded perspective view of the same.

【図６】同上の組み立てた状態の斜視図である。FIG. 6 is a perspective view of the same assembled state.

【図７】本発明の第２の実施の形態を示す閉極状態の側
面図である。FIG. 7 is a side view of a closed state according to the second embodiment of the present invention.

【図８】同上の過電流時の開極状態を示す側面図であ
る。FIG. 8 is a side view showing an open state at the time of an overcurrent according to the first embodiment.

【図９】同上の短絡電流時の開極状態を示す側面図であ
る。FIG. 9 is a side view showing an open state at the time of a short-circuit current according to the first embodiment.

【図１０】本発明の第３の実施の形態を示す閉極状態の
側面図である。FIG. 10 is a side view of a third embodiment of the present invention in a closed state.

【図１１】同上の過電流時の開極状態を示す側面図であ
る。FIG. 11 is a side view showing an open state at the time of an overcurrent according to the first embodiment.

【図１２】同上の短絡電流時の開極状態を示す側面図で
ある。FIG. 12 is a side view showing an open state at the time of a short-circuit current according to the first embodiment.

【図１３】同上に用いる取付保持ばねを示す斜視図であ
る。FIG. 13 is a perspective view showing a mounting and holding spring used in the embodiment.

【図１４】本発明の第４の実施の形態を示す閉極状態の
側面図である。FIG. 14 is a side view showing a fourth embodiment of the present invention in a closed state.

【図１５】同上の過電流時の開極状態を示す側面図であ
る。FIG. 15 is a side view showing an open state at the time of an overcurrent according to the first embodiment.

【図１６】同上の短絡電流時の開極状態を示す側面図で
ある。FIG. 16 is a side view showing an open state at the time of the short-circuit current of the above.

【図１７】本発明の第５の実施の形態を示す閉極状態の
側面図である。FIG. 17 is a side view showing a fifth embodiment of the present invention in a closed state.

【図１８】同上の過電流時の開極状態を示す側面図であ
る。FIG. 18 is a side view showing an open state at the time of an overcurrent according to the first embodiment.

【図１９】同上の短絡電流時の開極状態を示す側面図で
ある。FIG. 19 is a side view showing an open state at the time of the short-circuit current according to the first embodiment.

【図２０】同上に用いる取付保持ばねを示す斜視図であ
る。FIG. 20 is a perspective view showing a mounting and holding spring used in the above.

【図２１】本発明の第６の実施の形態を示す閉極状態の
側面図である。FIG. 21 is a side view showing a sixth embodiment of the present invention in a closed state.

【図２２】同上の過電流時の開極状態を示す側面図であ
る。FIG. 22 is a side view showing an open state at the time of an overcurrent according to the first embodiment.

【図２３】同上の短絡電流時の開極状態を示す側面図で
ある。FIG. 23 is a side view showing an open state at the time of a short-circuit current of the above.

【図２４】同上に用いる取付保持ばねを示す斜視図であ
る。FIG. 24 is a perspective view showing a mounting and holding spring used in the embodiment.

【図２５】本発明の第７の実施の形態を示す閉極状態の
側面図である。FIG. 25 is a side view of the seventh embodiment of the present invention in a closed state.

【図２６】同上の過電流時の開極状態を示す側面図であ
る。FIG. 26 is a side view showing an open state at the time of an overcurrent according to the first embodiment;

【図２７】同上の短絡電流時の開極状態を示す側面図で
ある。FIG. 27 is a side view showing an open state at the time of the short-circuit current according to the third embodiment.

【図２８】本発明の第８の実施の形態を示す閉極状態の
側面図である。FIG. 28 is a side view of an eighth embodiment of the present invention in a closed state.

【図２９】同上の過電流時の開極状態を示す側面図であ
る。FIG. 29 is a side view showing an open state at the time of an overcurrent according to the embodiment.

【図３０】同上の短絡電流時の開極状態を示す側面図で
ある。FIG. 30 is a side view showing an open state at the time of a short-circuit current of the above.

【図３１】本発明の第９の実施の形態を示す閉極状態の
側面図である。FIG. 31 is a side view showing a ninth embodiment of the present invention in a closed state.

【図３２】同上の過電流時の開極状態を示す側面図であ
る。FIG. 32 is a side view showing an open state at the time of an overcurrent according to the embodiment.

【図３３】同上の短絡電流時の開極状態を示す側面図で
ある。FIG. 33 is a side view showing an open state at the time of the short-circuit current of the above.

【符号の説明】[Explanation of symbols]

１ 器体 １ｃ 位置規制溝 １ｅ 位置規制突起 ２ａ，２ｂ 接点 ３ 開閉機構 ４ 引外し装置 ４１ 第１鉄心 ４１ａ ラッチ突起 ４１ｂ 主鉄心 ４１ｈ 押当部 ４２ バイメタル ４３ 保持ばね ４４ 第２鉄心 ４４ａ 主鉄心 ４５ 取付ばね ４８ 取付保持ばね ４９ 取付保持ばね ４６ 復帰ばね ６１ 復帰ばね ６２ 復帰ばね ６３ 復帰ばね DESCRIPTION OF SYMBOLS 1 Body 1c Position regulation groove 1e Position regulation protrusion 2a, 2b Contact 3 Opening / closing mechanism 4 Tripping device 41 1st iron core 41a Latch protrusion 41b Main iron core 41h Pressing part 42 Bimetal 43 Holding spring 44 2nd iron core 44a Main iron core 45 Mounting Spring 48 Mounting / holding spring 49 Mounting / holding spring 46 Return spring 61 Return spring 62 Return spring 63 Return spring

───────────────────────────────────────────────────── フロントページの続き (72)発明者 水野 初男 大阪府門真市大字門真1048番地松下電工株 式会社内 Ｆターム(参考） 5G030 BA01 BA06 FA01 FC11 XX08 XX12 YY06  ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hatsuo Mizuno 1048 Kazuma Kadoma, Kadoma-shi, Osaka Matsushita Electric Works F-term (reference) 5G030 BA01 BA06 FA01 FC11 XX08 XX12 YY06

Claims (14)

【特許請求の範囲】[Claims] 【請求項１】 電源と負荷との間の通電電路に挿入され
た接点と、接点の閉極時に接点を開極する向きの力を蓄
えて係止状態とし係止状態が解除されると前記力により
接点を強制開極させる開閉機構とを器体に備える回路遮
断器に用いられ、接点の閉極時に大電流が前記通電電路
に流れると前記係止状態を解除して接点を強制開極させ
る引外し装置であって、一対の側片の一端間を一体に連
結した形状の一方の主鉄心との間で前記通電電路の一部
を囲繞するように配設されて一端側を前記一方の主鉄心
の２つの側片に当接させるとともに他端側を前記一方の
主鉄心の２つの側片から離間させた状態で保持される他
方の主鉄心とをそれぞれ備える第１鉄心および第２鉄心
を備え、第１鉄心と第２鉄心との一方に一体形成されて
開閉機構を係止状態とする係止部を設け、通電電路に大
電流が流れると第１鉄心と第２鉄心との離間側を吸着さ
せて開閉機構と係止部との係止状態を解除することによ
り接点を強制開極させることを特徴とする回路遮断器の
引外し装置。1. A contact inserted into a current path between a power supply and a load, and a force in a direction of opening the contact when the contact is closed is stored in a locked state, and when the locked state is released, the contact is released. Used in a circuit breaker provided with an opening and closing mechanism for forcibly opening contacts by force in a body, and when a large current flows through the conducting circuit when the contacts are closed, the locked state is released and the contacts are forcibly opened. A tripping device, wherein one end of the pair of side pieces is integrally connected to one of the main iron cores so as to surround a part of the current-carrying circuit, and one end of the tripping piece is connected to the one end. A first iron core and a second iron core, each of which has the other main core held in a state where the other main core is in contact with the two side pieces of the main iron core and the other end side is separated from the two side pieces of the one main iron core. An iron core is formed integrally with one of the first iron core and the second iron core to lock the opening / closing mechanism. When a large current flows through the current path, the separated side between the first and second cores is attracted to release the locked state between the opening / closing mechanism and the locked portion, thereby forcing the contacts. A tripping device for a circuit breaker, characterized in that the pole is opened. 【請求項２】 前記通電電路を過電流によって自由端側
が変位するバイメタルとし、バイメタルの自由端側に前
記係止部を備えた第１鉄心または第２鉄心をバイメタル
の変位によって前記係止部と前記開閉機構との係止状態
を解除する方向として連結する板ばねよりなる保持ばね
を設けたことを特徴とする請求項１記載の回路遮断器の
引外し装置。2. An electric circuit comprising a bimetal whose free end is displaced by an overcurrent, wherein a first core or a second iron core having the engaging portion on the free end of the bimetal is connected to the engaging portion by displacing the bimetal. 2. The tripping device for a circuit breaker according to claim 1, further comprising a holding spring formed of a leaf spring connected in a direction of releasing the locked state with the opening / closing mechanism. 【請求項３】 前記バイメタルの自由端側を、開閉機構
の一部が係止部に係止された状態でその係止力が働く方
向として配設したことを特徴とする請求項２記載の回路
遮断器の引外し装置。3. The bimetal free end side is arranged in a direction in which a locking force acts when a part of the opening and closing mechanism is locked by a locking portion. Circuit breaker trip device. 【請求項４】 前記バイメタルの自由端側を、開閉機構
の一部が係止部に係止された状態でその係止力が働かな
い方向として配設したことを特徴とする請求項２記載の
回路遮断器の引外し装置。4. A free end side of the bimetal is arranged in a direction in which a locking force does not work when a part of the opening / closing mechanism is locked by a locking portion. Circuit breaker tripping device. 【請求項５】 前記第１鉄心と前記第２鉄心とを連結す
るとともに第１鉄心および第２鉄心の離間側で係止部が
非形成な第２鉄心または第１鉄心を係止部が形成された
第１鉄心または第２鉄心側として付勢する板ばねよりな
る取付ばねを設け、取付ばねによって付勢された係止部
が非形成な第２鉄心または第１鉄心の係止部が形成され
た第１鉄心または第２鉄心との対向面側に当接する移動
規制部を器体に設けたことを特徴とする請求項２ないし
請求項４記載の回路遮断器の引外し装置。5. A locking portion that connects the first core and the second core and that forms a second core or a first core having no locking portion on the side away from the first and second cores. A mounting spring made of a leaf spring biased as the first or second core side is provided, and a locking portion of the second core or the first core is formed without a locking portion urged by the mounting spring. 5. The tripping device for a circuit breaker according to claim 2, wherein a movement restricting portion is provided on the body to abut on the side facing the first core or the second core. 【請求項６】 前記通電電路を過電流によって自由端側
が変位するバイメタルとし、バイメタルの自由端側に前
記係止部を備えた第１鉄心または第２鉄心をバイメタル
の変位によって前記係止部と前記開閉機構との係止状態
を解除する方向として連結するとともに前記第１鉄心と
前記第２鉄心とを連結し、かつ第１鉄心および第２鉄心
の離間側で係止部が非形成な第２鉄心または第１鉄心を
係止部が形成された第１鉄心または第２鉄心側として付
勢する板ばねよりなる取付保持ばねを設け、取付保持ば
ねによって付勢された係止部が非形成な第２鉄心または
第１鉄心の係止部が形成された第１鉄心または第２鉄心
との対向面側に当接する移動規制部を器体に設けたこと
を特徴とする請求項１または請求項３または請求項４の
いずれか１項に記載の回路遮断器の引外し装置。6. A bimetal whose free end is displaced by an overcurrent on the current path, and a first core or a second iron core having the engaging portion on the free end of the bimetal is connected to the engaging portion by displacing the bimetal. The first core is connected to the opening and closing mechanism in a direction to release the locked state, the first core is connected to the second core, and the first core and the second core are not formed with a locking portion on the side away from the second core. A mounting / holding spring composed of a leaf spring for urging the second core or the first core as the first or second core having the locking portion is provided, and the locking portion urged by the mounting / holding spring is not formed. The body is provided with a movement restricting portion that abuts on a side facing the first iron core or the second iron core on which the engaging portion of the second iron core or the first iron core is formed. Item 3 or any one of claim 4 Circuit breaker tripping device. 【請求項７】 前記係止部が非形成な第２鉄心または第
１鉄心の係止部が形成された第１鉄心または第２鉄心と
の離間側を器体に回動自在に軸支させ、係止部が非形成
な第２鉄心または第１鉄心を係止部が形成された第１鉄
心または第２鉄心方向に付勢する復帰ばねを前記器体内
に配設したことを特徴とする請求項２ないし請求項４記
載の回路遮断器の引外し装置。7. A second core having no locking portion or a first core or a second core having a locking portion of the first iron formed on a side thereof rotatably supported by a body. And a return spring for urging the second core or the first core having no locking portion in the direction of the first core or the second core having the locking portion is provided in the body. The trip device for a circuit breaker according to claim 2. 【請求項８】 前記通電電路を過電流によって自由端側
が変位するバイメタルとし、前記係止部を有する第１鉄
心または第２鉄心からバイメタルの自由端側に延出して
バイメタルの変位によって係止部に係止された開閉機構
部の一部を解除する方向に駆動される駆動部を設けたこ
とを特徴とする請求項１記載の回路遮断器の引外し装
置。8. A bimetal whose free end is displaced by an overcurrent on the current path, and extends from the first or second iron core having the engaging portion to the free end of the bimetal, and the engaging portion is displaced by the bimetal. 2. The tripping device for a circuit breaker according to claim 1, further comprising a driving unit that is driven in a direction to release a part of the opening / closing mechanism unit locked to the unit. 【請求項９】 前記第１鉄心および前記第２鉄心間を、
第１鉄心と第２鉄心との離間側を離す方向に付勢する板
ばねを介して連結したことを特徴とする請求項８記載の
回路遮断器の引外し装置。9. The method according to claim 1, wherein the first core and the second core are
9. The tripping device for a circuit breaker according to claim 8, wherein the first and second cores are connected via a leaf spring that urges the separated side of the first and second cores away from each other. 【請求項１０】 前記バイメタルを連結してバイメタル
に対向する固定電路を設け、該固定電路に係止部が非形
成な第２鉄心または第１鉄心を固定したことを特徴とす
る請求項９記載の回路遮断器の引外し装置。10. A fixed electric circuit connected to the bimetal and provided with a fixed electric circuit facing the bimetal, wherein a second core or a first iron core having no locking portion is fixed to the fixed electric circuit. Circuit breaker tripping device. 【請求項１１】 前記バイメタルに係止部が非形成な第
２鉄心または第１鉄心を固着したことを特徴とする請求
項９記載の回路遮断器の引外し装置。11. The tripping device for a circuit breaker according to claim 9, wherein a second iron core or a first iron core having no locking portion is fixed to said bimetal. 【請求項１２】 前記係止部が形成された第１鉄心また
は第２鉄心の係止部が非形成な第２鉄心または第１鉄心
との当接側を器体に回動自在に軸支させ、第１鉄心およ
び第２鉄心の離間側を離す方向に付勢する復帰ばねを前
記器体内に設けたことを特徴とする請求項８記載の回路
遮断器の引外し装置。12. The first core or the second core having the locking portion formed thereon is rotatably supported on the container body such that the side of the first core or the second core where the locking portion is not formed is in contact with the second core or the first core. 9. The tripping device for a circuit breaker according to claim 8, wherein a return spring for urging the first core and the second core in a direction of separating the separated sides is provided in the body. 【請求項１３】 前記係止部が形成された第１鉄心また
は第２鉄心の係止部が非形成な第２鉄心または第１鉄心
との当接側と、係止部が非形成な第２鉄心または第１鉄
心の第１鉄心または第２鉄心との離間側とを器体に回動
自在に軸支させ、係止部が非形成な第２鉄心または第１
鉄心を係止部が形成された第１鉄心または第２鉄心方向
に付勢する復帰ばねを前記器体内に配設したことを特徴
とする請求項８記載の回路遮断器の引外し装置。13. A contact side of the first core or the second core where the locking portion is formed with the second core or the first core where the locking portion is not formed, and a first side where the locking portion is not formed. The second core or the first core or the first core having the second core or the first core rotatably supported by the body and the side of the first core separated from the first core or the second core, and having no locking portion.
9. The tripping device for a circuit breaker according to claim 8, wherein a return spring for urging the iron core in the direction of the first iron core or the second iron core having the locking portion is disposed in the housing. 【請求項１４】 前記バイメタルを連結してバイメタル
に対向する固定電路を設け、該固定電路と係止部が形成
された第１鉄心または第２鉄心との間と、第１鉄心およ
び第２鉄心の離間側で係止部が非形成な第２鉄心または
第１鉄心を係止部が形成された第１鉄心または第２鉄心
側として付勢した状態で第１鉄心と第２鉄心との間とを
連結する板ばねを設け、第２の板ばねによって付勢され
た係止部が非形成な第２鉄心または第１鉄心の係止部が
形成された第１鉄心または第２鉄心との対向面側に当接
する移動規制部を器体に設けたことを特徴とする請求項
８記載の回路遮断器の引外し装置。14. A fixed electric circuit connected to the bimetal to provide a fixed electric circuit facing the bimetal, and a first iron core and a second iron core between the fixed electric circuit and a first iron core or a second iron core having a locking portion. Between the first iron core and the second iron core in a state where the second core or the first iron core on which the locking portion is not formed on the separation side of the first core or the first core or the second core side on which the locking portion is formed is urged. And a first iron core or a second iron core formed with a second core or a first iron core having no locking portion urged by the second plate spring. 9. The tripping device for a circuit breaker according to claim 8, wherein a movement restricting portion that abuts on the facing surface side is provided on the housing.
JP2000207585A 2000-07-07 2000-07-07 Circuit breaker trip device Expired - Lifetime JP3763250B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000207585A JP3763250B2 (en) 2000-07-07 2000-07-07 Circuit breaker trip device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000207585A JP3763250B2 (en) 2000-07-07 2000-07-07 Circuit breaker trip device

Publications (2)

Publication Number Publication Date
JP2002025415A true JP2002025415A (en) 2002-01-25
JP3763250B2 JP3763250B2 (en) 2006-04-05

Family

ID=18704328

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000207585A Expired - Lifetime JP3763250B2 (en) 2000-07-07 2000-07-07 Circuit breaker trip device

Country Status (1)

Country Link
JP (1) JP3763250B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012155954A (en) * 2011-01-25 2012-08-16 Panasonic Corp Circuit breaker
JP2020155330A (en) * 2019-03-20 2020-09-24 テンパール工業株式会社 Circuit breaker
JP2020155329A (en) * 2019-03-20 2020-09-24 テンパール工業株式会社 Circuit breaker

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012155954A (en) * 2011-01-25 2012-08-16 Panasonic Corp Circuit breaker
JP2020155330A (en) * 2019-03-20 2020-09-24 テンパール工業株式会社 Circuit breaker
JP2020155329A (en) * 2019-03-20 2020-09-24 テンパール工業株式会社 Circuit breaker
JP2021168308A (en) * 2019-03-20 2021-10-21 テンパール工業株式会社 Circuit breaker
JP2021168307A (en) * 2019-03-20 2021-10-21 テンパール工業株式会社 Circuit breaker
JP7261500B2 (en) 2019-03-20 2023-04-20 テンパール工業株式会社 circuit breaker
JP7282406B2 (en) 2019-03-20 2023-05-29 テンパール工業株式会社 circuit breaker
JP7510212B2 (en) 2019-03-20 2024-07-03 テンパール工業株式会社 Circuit Breakers

Also Published As

Publication number Publication date
JP3763250B2 (en) 2006-04-05

Similar Documents

Publication Publication Date Title
JPH07254340A (en) Electromagnetic relay
JP3444215B2 (en) Circuit breaker trip device
JP2002025415A (en) Pull-out device for circuit breaker
JP2000164108A (en) Circuit breaker
JP2002025416A (en) Pull-out device for circuit breaker
JP3640169B2 (en) Circuit breaker trip device
JP3800027B2 (en) Circuit breaker
JP4042461B2 (en) Circuit breaker trip device
JP3675467B2 (en) Circuit breaker
JP3046878B2 (en) Circuit breaker current detection device
JP2003068183A (en) Trip for circuit breaker
JP3800033B2 (en) Circuit breaker
JP3941306B2 (en) Remote control relay
JPH082908Y2 (en) Circuit breaker for wiring
JP3151319B2 (en) 2-pole remote control relay
JP3210415B2 (en) Circuit breaker current detection device
JPH082917Y2 (en) Circuit breaker for wiring
JP3328996B2 (en) Circuit breaker
JPH10255633A (en) Electromagnetic relay
JP4412041B2 (en) relay
JP2939053B2 (en) Circuit breaker current detection device
JP2001307611A (en) Circuit breaker
JP2002245920A (en) Overcurrent trip device of circuit breaker
JP3304673B2 (en) Circuit breaker
JPH0628763Y2 (en) Thermal overcurrent relay

Legal Events

Date Code Title Description
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20040715

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20040727

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20040927

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20050308

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20050509

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20051227

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20060109

R151 Written notification of patent or utility model registration

Ref document number: 3763250

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R151

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090127

Year of fee payment: 3

S533 Written request for registration of change of name

Free format text: JAPANESE INTERMEDIATE CODE: R313533

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090127

Year of fee payment: 3

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100127

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100127

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110127

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120127

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120127

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130127

Year of fee payment: 7

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130127

Year of fee payment: 7

EXPY Cancellation because of completion of term