JP3711663B2 - External circuit handle device for circuit breaker - Google Patents

External circuit handle device for circuit breaker Download PDF

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Publication number
JP3711663B2
JP3711663B2 JP28950996A JP28950996A JP3711663B2 JP 3711663 B2 JP3711663 B2 JP 3711663B2 JP 28950996 A JP28950996 A JP 28950996A JP 28950996 A JP28950996 A JP 28950996A JP 3711663 B2 JP3711663 B2 JP 3711663B2
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Japan
Prior art keywords
handle
lock lever
lock
lever
circuit breaker
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Expired - Fee Related
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JP28950996A
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Japanese (ja)
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JPH10134693A (en
Inventor
充是 山崎
誠 大沢
直司 内田
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.)
Fuji Electric FA Components and Systems Co Ltd
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Fuji Electric FA Components and Systems Co Ltd
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Priority to JP28950996A priority Critical patent/JP3711663B2/en
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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10Operating or release mechanisms
    • H01H71/50Manual reset mechanisms which may be also used for manual release
    • H01H71/56Manual reset mechanisms which may be also used for manual release actuated by rotatable knob or wheel
    • H01H2071/565Manual reset mechanisms which may be also used for manual release actuated by rotatable knob or wheel using a add on unit, e.g. a separate rotary actuator unit, mounted on lever actuated circuit breakers
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/20Interlocking, locking, or latching mechanisms
    • H01H9/28Interlocking, locking, or latching mechanisms for locking switch parts by a key or equivalent removable member
    • H01H9/281Interlocking, locking, or latching mechanisms for locking switch parts by a key or equivalent removable member making use of a padlock

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  • Breakers (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、配電盤,制御盤などに組み込んだ回路しゃ断器を盤外から手動操作でON,OFF,およびリセットするための外部操作ハンドル装置に関する。
【0002】
【従来の技術】
配電盤,制御盤などに組み込んだ回路しゃ断器を盤外から手動操作でON,OFFするために、回路しゃ断器に回転操作式の外部操作ハンドル装置を組合わせ、該ハンドル装置のハンドル摘みを配電盤の操作パネル前面に突き出して盤外から操作するようにしたものが周知である。
【0003】
また、かかる外部操作ハンドル装置について、盤内に保守員が入って点検作業を行っている際に、誤って他人が盤外のハンドルをOFFからONに切換えると、OFF状態にあった回路しゃ断器がONに切換わって盤内の配線回路が活線状態になるために、盤内に入っている保守員が感電事故を起こすおそれがあることから、外部操作ハンドル装置にハンドル摘みをOFF位置に鎖錠するロック手段として、ハンドル装置に南京錠を掛けて施錠するようにした構成のものが既に製品化されている。
【0004】
図5,図6はかかる鎖錠手段付きの外部操作ハンドル装置の構成図であり、図において、1は配電盤の内部に設置した回路しゃ断器、2は配電盤パネル3の前面側に回転式のハンドル把手を突出して回路しゃ断器1に取付けた外部操作ハンドル装置である。このハンドル装置2はボディ(樹脂成形品)4の前面側に回転操作式のハンドル把手5を組み込み、このハンドル把手5をボディ4の周壁(ハンドル把手5を取り囲む外枠)4aに表示したON,OFFのマークに合わせて回すと、ハンドル把手5に連繋した駆動アーム6が矢印方向に移動して回路しゃ断器1の操作ハンドル1aをON,もしくはOFF位置に切り換える。なお、ハンドル把手5はON/OFF位置との間で90゜回転するようになっている。
【0005】
また、かかるハンドル装置2に対し、ハンドル把手5をOFF位置に鎖錠する手段として、ボディ周壁4aの周面にOFF用のロック穴4bを開口し、このロック穴4bに南京錠7の腕金7aを図示のように通してハンドル把手5がOFFからON位置に回せないようにしている。
【0006】
【発明が解決しようとする課題】
ところで、前記構成の外部操作ハンドル装置では、安全管理の面で次記のような問題点が残る。
すなわち、ハンドル把手5をONの位置に回して回路しゃ断器1の主接点を閉じた通電状態で、負荷回路に過電流が流れた際に回路しゃ断器1が万が一故障してトリップ動作しないと、しゃ断器の主接点が過電流の通電に伴う発熱で溶着していつまでも通電状態のままになるといった異常事態が発生する。しかも、接点が溶着した異常事態であっても、回路しゃ断器1の操作ハンドル1aを外部から力を加えてOFF位置に動かすことは可能である。但し、操作ハンドル1aをOFF位置に動かしても可動接点が固定接点に溶着しているために可動接触子の開閉機構(トグルリンク機構)は反転動作せず、外部からの操作力が無くなれば操作ハンドル1aはしゃ断器内蔵の開閉ばねのばね力でOFF位置に復帰する。
【0007】
このために、回路しゃ断器の可動接触子と固定接触子が溶着した異常事態が生じた場合でも、外部操作ハンドル装置2のハンドル把手5を片方の手でONからOFF位置に回しつつ、この位置で他方の手に持った南京錠7をロック穴4bに掛け止めすることでハンドル把手5をOFF位置に鎖錠することが可能である。したがって、この場合には保守員は外部操作ハンドル装置2のハンドル把手5をOFF位置に回して鎖錠したことで、回路しゃ断器1がOFFになったと誤判断するおそれがある。
【0008】
しかしながら、実際には外部操作ハンドル装置2のハンドル把手5をOFF位置に南京錠7で鎖錠しても、回路しゃ断器1の主回路接点は溶着されたままで配電盤内は活線状態にあることから、点検のために保守員が配電盤内に立ち入ると感電する危険がある。
本発明は上記の点にかんがみなされたものであり、その目的は前記課題を解決し、回路しゃ断器に接点溶着などの異常事態が生じた状態では、ハンドル装置の操作によるしゃ断器ON,OFF動作の誤認を避けるために、ハンドル把手を簡単にOFF位置に鎖錠できないないようにして感電事故に対する保安性の改善を図った回路しゃ断器の外部操作ハンドル装置を提供することにある。
【0009】
【課題を解決するための手段】
上記目的を達成するために、本発明によれば、回転操作式のハンドル把手をOFF位置に鎖錠する手段としてハンドル把手にロックレバーを組み込み、ハンドル把手のOFF位置で前記ロックレバーを鎖錠位置に引出し、この位置でロックレバーにロックさせてハンドル把手をOFF位置に鎖錠するようにするとともに、前記ロックレバーに対し、常時はロックレバーを釈放位置に拘束保持し、手動操作によりロックレバーの拘束を解くロックレバー鎖錠手段を備えものとし、該ロックレバー鎖錠手段は具体的に次記のような形態で構成するものとする。
【0010】
1)ロックレバー鎖錠手段として、ロックレバーに設けた掛け穴に対向してハンドル把手に手動操作で係止を解く自動復帰形のレバー係止爪を組み込み、常時は係止爪を前記掛け穴に係合してロックレバーを釈放位置に係止保持し、ロックレバーを鎖錠位置へ移動する際に係止爪を手動操作で掛け穴から外すように構成する。
【0011】
2)ロックレバー鎖錠手段として、ロックレバーに設けたピン穴に対向してハンドル把手に手動操作で係止を解く自動復帰形のレバー係止ピンを組み込み、常時は係止ピンをばね付勢により前記ピン穴に差し込んでロックレバーを釈放位置に係止保持し、ロックレバーを鎖錠位置へ移動する際に係止ピンを手動操作でピン穴から引き出すように構成する。
【0012】
3)ロックレバー鎖錠手段として、ロックレバーの移動経路にレバーを釈放位置に拘束する自動復帰形のスライド式シャッタを備え、常時はシャッタをばね付勢により綴じてロックレバーを釈放位置に拘束保持し、ロックレバーを鎖錠位置に移動する際にシャッタを手動操作で退避位置に押し開くように構成する。
上記のように、外部操作ハンドル装置に対して、その回転操作式ハンドル把手に南京錠を掛けてOFF位置に鎖錠するロックレバー、および該ロックレバーを常時は釈放位置に拘束保持し、ロックレバーを鎖錠位置に引き出す際に手動操作でロックレバーの拘束を解く前項1)〜3)のレバー鎖錠手段を備えたことにより、外部操作ハンドル装置のハンドル把手をONからOFF位置に切換えた上でロックレバーに南京錠を掛けて鎖錠するには、操作手順として次のような三つの操作を行う必要がある。すなわち、
▲1▼ハンドル把手をON位置からOFF位置に回した後に、ロックレバーを釈放位置から鎖錠位置へ引き出せるように、手動操作によってレバー鎖錠手段の拘束を解く。
【0013】
▲2▼次にレバー鎖錠手段を片方の手で釈放位置に押さえたまま、ハンドル把手から離したもう一方の手でロックレバーを鎖錠位置に引き出す。
▲3▼その上でレバー鎖錠手段から離した手を使い、ロックレバーに南京錠の腕金を掛けて施錠する。
上記手順の操作で、保守員は両手を使っても同時に行える操作は二つであり、三つの操作を同時に進めることは不可能である。しかも、回路しゃ断器の接点が万一溶着した異常事態の下では、ハンドル装置のハンドル把手をONからOFF位置に回しても、この位置で把手から手を離すと途端にハンドル把手は回路しゃ断器のトグル機構のばね反力でON位置に戻ってしまうため、ハンドル装置のハンドル把手をOFF位置に鎖錠して南京錠を掛け止めすることがでない。したがって、保守員は回路しゃ断器のOFF動作を誤認することがないのは勿論のこと、回路しゃ断器に異常事態が発生したとをその場で判断し、直ちに適切な対応措置を講じることができる。
【0014】
なお、回路しゃ断器が健全に動作する通常の状態では、ハンドル装置を操作して回路しゃ断器をOFFさせた上でハンドル把手をOFF位置に鎖錠する場合には、ハンドル把手をON位置からOFF位置に回すと、ハンドル把手はそのままOFF位置に停止する。したがって、保安員は両手を使いながら先記の操作手順にしたがってハンドル装置の把手をOFF位置に鎖錠して南京錠を掛け止めすることができる。
【0015】
【発明の実施の形態】
以下、本発明の実施例を先記1)〜3)項の形態別に分けて図面に基づき説明する。なお、各実施例の図中で図5,図6に対応する同一部材には同じ符号が付してある。
〔実施例1〕
図1(a),(b) および図2(a),(b) は本発明の請求項2に対応する実施例を示すものである。この実施例においては、ハンドル把手5にロックレバー8,および該ロックレバー8を釈放位置に拘束保持するレバー鎖錠手段としての係止爪9が組み込まれており、またロックレバー8に対向してボディ4の周壁4aにはハンドル把手5のOFF位置に対応した箇所にロックレバー8の先端が入り込むスリット状の鎖錠溝4cが形成されている。
【0016】
ここで、ロックレバー8は支軸8aを介してハンドル把手5に偏芯軸支され、かつレバーの上縁側には南京錠7の腕金7aを通す錠穴8bが開口しており、前記支軸8aを支点にしてレバー上部をハンドル把手5の上面から上方へ引出し可能に組み込まれている。さらに、レバーの板面には先記の係止爪9と係合し合う掛け穴8cが設けてある。一方、係止爪9は段付きねじ9aを介してハンドル把手5に軸支され、かつ図示されてないばね(捩じりばね)により爪先端がロックレバー8の掛け穴8cに向けて突き出すように付勢されている。
【0017】
かかる構成で、常時はロックレバー8が自重で図示実線位置に引っ込み、レバー先端はボディ4の周壁4aに設けた鎖錠溝4cから後退しており、かつこの位置では係止爪9の爪先端がロックレバー8の掛け穴8cに嵌まり込んでロックレバー8を釈放位置に拘束保持している。したがって、この状態では、ハンドル把手5をON/OFFの位置に自由に回転操作することができる。
【0018】
一方、保守員が配電盤,制御盤内に立ち入るために、ハンドル装置2のハンドル把手5をOFFの位置に回して回路しゃ断器1をOFF動作させた上で、ハンドル把手5に南京錠7を掛けてOFF位置に鎖錠する場合には、次記の操作手順で行う。
▲1▼まず、ハンドル把手5を手動でONからOFF位置に回した後、手にドライバを持って前記した係止爪9の段付きねじを反時計方向に回し、係止爪9をロックレバー8の掛け穴8aから外し、ロックレバー8の拘束を解く。
【0019】
▲2▼次に、係止爪9を釈放位置に抑えたまま、ハンドル把手5から離した他方の手でロックレバー8を図示鎖線位置に引出してレバー先端をボディ4の周上に設けた鎖錠溝4cに嵌め込む。
▲3▼続いて、ロックレバー8を片方の手で引出し位置に支えたまま、係止爪9から離した手を使って南京錠7の腕金7aをハンドル把手5の上面側に突き出している錠穴8bに通して施錠する。
【0020】
これにより、ロックレバー8は南京錠7との掛け合いにより図示の鎖線位置に施錠され、同時にハンドル把手5はOFF位置からON位置に向けて回らないように鎖錠される。したがって、回路しゃ断器1が正常に動作している限りは、主回路接点がOFF状態にロックされて盤内の主回路が非活線の状態となる。
これに対して、回路しゃ断器1に万一接点溶着が生じていて、ハンドル装置2のハンドル把手5をOFF位置に回してもしゃ断器の接点が開かない場合には、先記した操作手順▲2▼でハンドル把手5から手を離すと、途端にハンドル把手5はしゃ断器のトグル機構からの反力でOFF位置からON位置に戻ってしまい、▲3▼の操作に進むことができない。つまり、保守員一人では両手を使ってもハンドル把手5をOFF位置に鎖錠することができないので、保守員は回路しゃ断器1に異常が生じたことが判別できる。また、ハンドル装置2をOFF位置へ簡単に鎖錠できないので、しゃ断器がOFFに切り換わったと誤認するおそれもない。
【0021】
〔実施例2〕
図3(a),(b) は本発明の請求項3に対応する先記実施例1の応用実施例を示すものである。この実施例においては、ロックレバー8に対するレバー鎖錠手段として、実施例1における係止爪9の代わりに、レバー係止ピン10がハンドル把手5に組み込まれており、この係止ピン10に対向してロックレバー8の板面にはピン穴8dが開口している。また、係止ピン10は復帰ばね10aのばね力でピンの先端を前記ピン穴8dに向けて付勢されており、かつピンの一端がハンドル把手5の側方に突き出している。
【0022】
かかる構成で、ハンドル把手5をOFF位置に鎖錠する操作手順は、レバー係止ピン10の釈放操作のやり方を除いて先記実施例1と同様であり、常時は係止ピン10がロックレバー8のピン穴8dに嵌まり込んで、レバーを釈放位置に拘束保持している。一方、ハンドル把手5のOFF位置でロックレバー8を鎖錠位置に引き出す場合には、片方の手で係止ピン10を復帰ばね10aに抗してピンを引っ張り、ピン穴8dから引き抜く。そして、ロックレバー8を鎖錠位置に引出した上で、その錠穴8bに実施例1で述べたと同様に南京錠の腕金を掛けて施錠することにより、ハンドル把手5がOFF位置に鎖錠される。また、回路しゃ断器1の接点が万一溶着している場合には、実施例1と同様に両手を使った操作ではハンドル把手5をOFF位置に回してた上でロックレバーに南京錠を掛けることができず、これによりしゃ断器OFFの誤認を防ぐことができる。
【0023】
〔実施例3〕
図4(a),(b) は本発明の請求項4に対応する実施例を示すものである。この実施例においては、ロックレバー8の先端に対向してハンドル装置2のボディ4に設けた鎖錠溝4cの内周側には手動で釈放操作するスライド式のシャッタ11がボディ4の溝穴の中に組み込まれている。このシャッタ11は、常時はロックレバー8を釈放位置に拘束保持するためのものであり、シャッタ板の下端側に介挿した復帰ばね11aのばね力でシャッタ11を上方に突き出し、ロックレバー8が鎖錠位置に移動できないようにその経路を塞いでいる。
【0024】
一方、ハンドル把手5をOFF位置に回して鎖錠する場合には、シャッタ11の上端突起部11bを指先で下方に押し込むと、シャッタ11が鎖線位置に移動してロックレバー8の移動通路を開放する。したがって、片方の手を使ってシャッタ11を釈放位置に押さえ込んだまま、他方の手でロックレバー8を先記実施例1,実施例2で述べたと同様に鎖錠位置に引出し、さらにシャッタ11から離した手でロックレバー8の錠穴8bに南京錠を掛けて施錠することで、ハンドル把手5をOFF位置に鎖錠することができる。また、回路しゃ断器1の接点が万一溶着している場合には、先記の各実施例と同様にハンドル把手5をOFF位置に回してた上でロックレバーに南京錠を掛けることが困難となり、これによりしゃ断器OFFの誤認を防ぐことができる。
【0025】
【発明の効果】
以上述べたように本発明の構成によれば、ハンドル把手にロックレバーを組み込むとともに、常時はロックレバーを釈放位置に拘束保持する手動釈放式のレバー鎖錠手段を設けたことにより、ハンドル把手をON位置からOFF位置に回した上で、南京錠をロックレバーに掛けてハンドル把手をOFF位置に鎖錠する場合に、回路しゃ断器が健全であれば簡単な手動操作でハンドル装置の把手に南京錠を掛けてOFF位置に鎖錠することができる。
【0026】
一方、回路しゃ断器に主接点溶着などの異常が万一生じた場合には、保守員一人では両手を使ってもハンドル把手をOFF位置に鎖錠することができない。したがって、主接点の溶着といった回路しゃ断器の異常発生事態の下では、ハンドル把手をOFF位置に鎖錠するといった誤操作が防止できることは勿論のこと、これに起因する回路しゃ断器のOFF動作誤認を回避して盤内に立ち入る際の感電事故防止の安全性をより一層高めることができる。
【図面の簡単な説明】
【図1】本発明の実施例1に対応する外部操作ハンドル装置全体の構成図であり、(a) は平面図、(b) は要部を断面した側面図
【図2】図1におけるハンドル把手の鎖錠機構部の拡大図であり、(a) は平面図、(b) は断面側視図
【図3】本発明の実施例2に対応するハンドル装置の要部構成図であり、(a) は平面図、(b) は断面側視図
【図4】本発明の実施例3に対応するハンドル装置の要部構成図であり、(a) 断面側視図、(b) は(a) の矢視P方向から見た断面図
【図5】従来における回路しゃ断器の外部操作ハンドル装置を示す外観斜視図
【図6】図5の側面図
【符号の説明】
1 回路しゃ断器
1a 操作ハンドル
2 外部操作ハンドル装置
3 配電盤パネル
4 ボディ
4a 周壁
4c 鎖錠溝
5 ハンドル把手
7 南京錠
7a 腕金
8 ロックレバー
8a 支軸
8b 錠穴
8c 係止爪の掛け穴
8d ピン穴
9 レバー係止爪
10 レバー係止ピン
10a 復帰ばね
11 シャッタ
11a 復帰ばね
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an external operation handle device for manually turning ON / OFF and resetting a circuit breaker incorporated in a switchboard, a control panel, etc. from outside the panel.
[0002]
[Prior art]
In order to turn on and off the circuit breaker incorporated in the switchboard, control panel, etc. manually from outside the panel, the circuit breaker is combined with a rotary operation type external operation handle device, and the handle knob of the handle device is connected to the switchboard. A device that protrudes from the front of the operation panel and is operated from outside the panel is well known.
[0003]
In addition, when an external operation handle device is inspected by maintenance personnel entering the panel, if another person accidentally switches the handle outside the panel from OFF to ON, the circuit breaker was in the OFF state. Switches to ON and the wiring circuit in the panel becomes live, so that maintenance personnel in the panel may cause an electric shock. As a lock means for locking, a configuration in which the handle device is locked with a padlock has already been commercialized.
[0004]
5 and 6 are configuration diagrams of such an external operation handle device with a locking means. In the figure, 1 is a circuit breaker installed inside the switchboard, and 2 is a rotary handle on the front side of the switchboard panel 3. It is an external operation handle device in which a handle protrudes and is attached to the circuit breaker 1. This handle device 2 incorporates a rotary handle handle 5 on the front side of a body (resin molded product) 4, and this handle handle 5 is displayed on the peripheral wall (outer frame surrounding the handle handle 5) 4 a of the ON, When turned according to the OFF mark, the drive arm 6 linked to the handle handle 5 moves in the direction of the arrow, and the operation handle 1a of the circuit breaker 1 is switched to the ON or OFF position. Note that the handle grip 5 is rotated 90 ° between the ON / OFF position.
[0005]
Further, as a means for locking the handle handle 5 to the OFF position with respect to the handle device 2, an OFF lock hole 4b is opened on the peripheral surface of the body peripheral wall 4a, and an arm metal 7a of the padlock 7 is provided in the lock hole 4b. As shown in the figure, the handle handle 5 cannot be turned from the OFF position to the ON position.
[0006]
[Problems to be solved by the invention]
By the way, in the external operation handle device having the above-described configuration, the following problems remain in terms of safety management.
That is, when the handle breaker 5 is turned to the ON position and the main contact of the circuit breaker 1 is closed and the overcurrent flows through the load circuit, the circuit breaker 1 should malfunction and not trip. An abnormal situation occurs in which the main contact of the circuit breaker is welded due to heat generated by energization of an overcurrent and remains energized indefinitely. Moreover, even in the abnormal situation where the contacts are welded, the operation handle 1a of the circuit breaker 1 can be moved to the OFF position by applying a force from the outside. However, even if the operating handle 1a is moved to the OFF position, since the movable contact is welded to the fixed contact, the opening / closing mechanism (toggle link mechanism) of the movable contact does not reverse, and if the operating force from the outside is lost, it can be operated. The handle 1a returns to the OFF position by the spring force of the open / close spring built in the circuit breaker.
[0007]
For this reason, even when an abnormal situation occurs in which the movable contact and the fixed contact of the circuit breaker are welded, while turning the handle 5 of the external operation handle device 2 from the ON position to the OFF position with one hand, Thus, the handle handle 5 can be locked in the OFF position by hooking the padlock 7 held in the other hand into the lock hole 4b. Therefore, in this case, the maintenance staff may erroneously determine that the circuit breaker 1 has been turned off by turning the handle handle 5 of the external operation handle device 2 to the OFF position and locking it.
[0008]
However, actually, even if the handle handle 5 of the external operation handle device 2 is locked to the OFF position with the padlock 7, the main circuit contact of the circuit breaker 1 remains welded and the inside of the switchboard is in a live line state. There is a risk of electric shock if maintenance personnel enter the switchboard for inspection.
The present invention has been considered in view of the above points, and its object is to solve the above-mentioned problems, and when an abnormal situation such as contact welding occurs in the circuit breaker, the breaker is turned ON / OFF by operating the handle device. In order to avoid such misunderstandings, it is an object of the present invention to provide an external operation handle device for a circuit breaker which improves the safety against electric shock by preventing the handle handle from being easily locked in the OFF position.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, a lock lever is incorporated into the handle handle as means for locking the rotary handle handle to the OFF position, and the lock lever is locked to the locked position at the handle handle OFF position. The lock handle is locked to the OFF position at this position, and the handle handle is locked to the OFF position, and the lock lever is always restrained and held at the release position with respect to the lock lever. The lock lever locking means for releasing the restraint is provided, and the lock lever locking means is specifically configured as follows.
[0010]
1) As a lock lever locking means, an automatic return type lever locking claw that unlocks the handle handle by manual operation is incorporated into the handle handle opposite to the locking hole provided in the lock lever. And the locking lever is locked and held in the release position, and the locking claw is manually removed from the hooking hole when the lock lever is moved to the locking position.
[0011]
2) As a lock lever locking means, an automatic return type lever lock pin that unlocks the handle handle manually is installed in the handle handle facing the pin hole provided in the lock lever, and the lock pin is normally biased by a spring. Thus, the lock lever is locked and held in the release position by being inserted into the pin hole, and the lock pin is manually pulled out from the pin hole when the lock lever is moved to the lock position.
[0012]
3) As a lock lever locking means, an automatic return type sliding shutter that restrains the lever to the release position is provided in the movement path of the lock lever, and the lock lever is always bound and held at the release position by binding the shutter with a spring bias. Then, when moving the lock lever to the lock position, the shutter is manually pushed to the retracted position.
As described above, with respect to the external operation handle device, a lock lever that locks the rotary operation handle handle with a padlock in the OFF position, and the lock lever is always restrained and held at the release position. When the lever lock means of the previous paragraphs 1) to 3), which unlocks the lock lever by manual operation when pulling it to the lock position, is provided, and the handle handle of the external operation handle device is switched from the ON position to the OFF position. To lock the lock lever with a padlock, it is necessary to perform the following three operations as an operation procedure. That is,
(1) After turning the handle handle from the ON position to the OFF position, the lever lock means is released by manual operation so that the lock lever can be pulled out from the release position to the lock position.
[0013]
(2) Next, while holding the lever locking means in the released position with one hand, pull the lock lever to the locked position with the other hand away from the handle handle.
(3) Then, use the hand released from the lever locking means and lock the lock lever with a padlock arm.
In the operation of the above procedure, the maintenance staff can perform two operations at the same time using both hands, and it is impossible to proceed with the three operations simultaneously. In addition, under abnormal circumstances where the contact of the circuit breaker is welded, the handle handle will be disconnected as soon as the handle is released from this position even if the handle handle of the handle device is turned from the ON position to the OFF position. Since the spring reaction force of the toggle mechanism of the device returns to the ON position, the handle handle of the handle device is not locked to the OFF position and the padlock cannot be locked. Therefore, the maintenance staff will not misunderstand the OFF operation of the circuit breaker, but can immediately determine that an abnormal situation has occurred in the circuit breaker and immediately take appropriate countermeasures. .
[0014]
In the normal state in which the circuit breaker operates soundly, when the handle breaker is locked to the OFF position after the handle breaker is turned off by operating the handle device, the handle handle is turned off from the ON position. When turned to the position, the handle handle stops at the OFF position. Therefore, the security officer can lock the padlock by locking the handle of the handle device to the OFF position according to the above-described operation procedure while using both hands.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described according to the forms of items 1) to 3) above with reference to the drawings. In the drawings of the embodiments, the same members corresponding to those in FIGS. 5 and 6 are denoted by the same reference numerals.
[Example 1]
1 (a), 1 (b) and 2 (a), 2 (b) show an embodiment corresponding to claim 2 of the present invention. In this embodiment, a lock lever 8 and a locking claw 9 as a lever locking means for restraining and holding the lock lever 8 in the released position are incorporated in the handle handle 5, and opposed to the lock lever 8. A slit-like locking groove 4 c into which the tip of the lock lever 8 enters is formed in the peripheral wall 4 a of the body 4 at a position corresponding to the OFF position of the handle grip 5.
[0016]
Here, the lock lever 8 is eccentrically supported by the handle grip 5 via a support shaft 8a, and a lock hole 8b through which the arm metal 7a of the padlock 7 is opened is formed on the upper edge side of the lever. The upper part of the lever is incorporated so as to be able to be drawn upward from the upper surface of the handle handle 5 with 8a as a fulcrum. Further, a hooking hole 8c that engages with the above-described locking claw 9 is provided on the plate surface of the lever. On the other hand, the latching claw 9 is pivotally supported by the handle grip 5 via a stepped screw 9a, and the claw tip protrudes toward the hooking hole 8c of the lock lever 8 by a spring (torsion spring) not shown. Is being energized.
[0017]
With this configuration, the lock lever 8 is normally retracted by its own weight to the position indicated by the solid line, the lever tip is retracted from the locking groove 4c provided in the peripheral wall 4a of the body 4, and the tip of the locking claw 9 is at this position. Is fitted into the hooking hole 8c of the lock lever 8 to hold the lock lever 8 in the released position. Therefore, in this state, the handle handle 5 can be freely rotated to the ON / OFF position.
[0018]
On the other hand, in order for maintenance personnel to enter the switchboard and control panel, the handle handle 5 of the handle device 2 is turned to the OFF position and the circuit breaker 1 is turned OFF, and then the padlock 7 is put on the handle handle 5. When locking to the OFF position, the following procedure is used.
(1) First, manually turn the handle handle 5 from the ON position to the OFF position, then hold the screwdriver in the hand and turn the stepped screw of the locking claw 9 in the counterclockwise direction to lock the locking claw 9 into the lock lever. Then, the lock lever 8 is released.
[0019]
(2) Next, with the locking claw 9 held in the released position, the lock lever 8 is pulled out to the chain line position shown in the figure with the other hand separated from the handle handle 5, and the end of the lever is provided on the circumference of the body 4. Fit into the lock groove 4c.
(3) Next, with the lock lever 8 supported by one hand in the pull-out position, the arm 7a of the padlock 7 is projected to the upper surface side of the handle grip 5 using a hand separated from the locking claw 9. Lock through hole 8b.
[0020]
Thereby, the lock lever 8 is locked at the chain line position shown in the figure by engaging with the padlock 7, and at the same time, the handle handle 5 is locked so as not to turn from the OFF position toward the ON position. Therefore, as long as the circuit breaker 1 operates normally, the main circuit contact is locked in the OFF state, and the main circuit in the panel is in a non-live line state.
On the other hand, if the contact breaker has occurred in the circuit breaker 1 and the contact of the breaker does not open even if the handle handle 5 of the handle device 2 is turned to the OFF position, the above operating procedure ▲ When the hand is released from the handle handle 5 in 2 ▼, the handle handle 5 is immediately returned from the OFF position to the ON position due to the reaction force from the toggle mechanism of the circuit breaker, and cannot proceed to the operation 3). That is, even if one maintenance person uses both hands, the handle handle 5 cannot be locked in the OFF position, so the maintenance person can determine that an abnormality has occurred in the circuit breaker 1. Further, since the handle device 2 cannot be easily locked to the OFF position, there is no possibility of misidentifying that the circuit breaker has been switched to OFF.
[0021]
[Example 2]
3 (a) and 3 (b) show an application example of the first embodiment corresponding to claim 3 of the present invention. In this embodiment, as a lever locking means for the lock lever 8, a lever locking pin 10 is incorporated in the handle grip 5 instead of the locking claw 9 in the first embodiment. A pin hole 8 d is opened on the plate surface of the lock lever 8. The locking pin 10 is urged toward the pin hole 8d by the spring force of the return spring 10a, and one end of the pin protrudes to the side of the handle handle 5.
[0022]
With this configuration, the operation procedure for locking the handle handle 5 to the OFF position is the same as that of the first embodiment except for the method of releasing the lever locking pin 10, and the locking pin 10 is always the locking lever. 8 is inserted into the pin hole 8d, and the lever is restrained and held at the release position. On the other hand, when the lock lever 8 is pulled out to the locked position when the handle handle 5 is in the OFF position, the locking pin 10 is pulled against the return spring 10a with one hand and pulled out from the pin hole 8d. Then, after pulling out the lock lever 8 to the locked position, the handle handle 5 is locked in the OFF position by locking the padlock with the armrest of the padlock in the same manner as described in the first embodiment. The Also, if the contacts of the circuit breaker 1 are welded, in the operation using both hands as in the first embodiment, the handle handle 5 is turned to the OFF position and the padlock is applied to the lock lever. This prevents the circuit breaker OFF from being misidentified.
[0023]
Example 3
4 (a) and 4 (b) show an embodiment corresponding to claim 4 of the present invention. In this embodiment, a sliding shutter 11 that is manually released is provided on the inner peripheral side of the locking groove 4 c provided in the body 4 of the handle device 2 so as to face the tip of the lock lever 8. It is built in. The shutter 11 is normally used to restrain and hold the lock lever 8 in the release position. The shutter 11 protrudes upward by the spring force of the return spring 11a inserted on the lower end side of the shutter plate, and the lock lever 8 The path is blocked so that it cannot move to the locked position.
[0024]
On the other hand, when the handle handle 5 is turned to the OFF position and locked, when the upper end protrusion 11b of the shutter 11 is pushed downward with the fingertip, the shutter 11 moves to the chain line position and the movement path of the lock lever 8 is opened. To do. Accordingly, with one hand being used to hold the shutter 11 in the released position, the other hand is used to pull the lock lever 8 to the locked position in the same manner as described in the first and second embodiments, and further from the shutter 11. The handle handle 5 can be locked in the OFF position by locking the padlock in the lock hole 8b of the lock lever 8 with the released hand. Also, if the contact of the circuit breaker 1 is welded, it is difficult to lock the padlock on the lock lever after turning the handle handle 5 to the OFF position as in the previous embodiments. Thus, it is possible to prevent misidentification of the circuit breaker OFF.
[0025]
【The invention's effect】
As described above, according to the configuration of the present invention, the handle lever is incorporated into the handle handle and is provided with the manual release lever locking means that normally holds and holds the lock lever in the release position. Turn the padlock from the ON position to the OFF position, and then lock the handle handle to the OFF position by hooking the padlock to the lock lever. It can be locked and locked in the OFF position.
[0026]
On the other hand, if an abnormality such as main contact welding occurs in the circuit breaker, the maintenance handle cannot be locked to the OFF position even if both maintenance personnel use both hands. Therefore, in the event of an abnormal circuit breaker such as welding of the main contact, it is possible not only to prevent erroneous operation such as locking the handle handle to the OFF position, but also to avoid misidentification of the circuit breaker caused by this. Thus, it is possible to further enhance the safety of preventing an electric shock accident when entering the board.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of an entire external operation handle device corresponding to Embodiment 1 of the present invention, where (a) is a plan view, and (b) is a side view of a cross section of the main part. FIG. FIG. 3 is an enlarged view of a handle locking mechanism, (a) is a plan view, and (b) is a cross-sectional side view. FIG. 3 is a configuration diagram of a main part of a handle device corresponding to a second embodiment of the present invention. (a) is a plan view, (b) is a cross-sectional side view. FIG. 4 is a configuration diagram of a main part of a handle device corresponding to Example 3 of the present invention, (a) a cross-sectional side view, and (b) is a cross-sectional side view. FIG. 5A is a cross-sectional view as viewed from the direction of arrow P in FIG. 5A. FIG. 5 is an external perspective view showing a conventional external operation handle device for a circuit breaker. FIG. 6 is a side view of FIG.
DESCRIPTION OF SYMBOLS 1 Circuit breaker 1a Operation handle 2 External operation handle device 3 Distribution board panel 4 Body 4a Perimeter wall 4c Locking groove 5 Handle grip 7 Padlock 7a Arm metal 8 Lock lever 8a Support shaft 8b Lock hole 8c Locking claw hook hole 8d Pin hole 9 Lever locking claw 10 Lever locking pin 10a Return spring 11 Shutter 11a Return spring

Claims (4)

配電盤などに組み込んだ回路しゃ断器を盤外からの手動操作でON,OFFする外部操作ハンドル装置であって、回転操作式のハンドル把手をOFF位置に鎖錠する手段としてハンドル把手にロックレバーを組み込み、ハンドル把手のOFF位置で前記ロックレバーを鎖錠位置に引出し、この位置でロックレバーをロックさせてハンドル把手をOFF位置に鎖錠するようにするとともに、前記ロックレバーに対して常時はロックレバーを釈放位置に拘束保持し、手動操作によりロックレバーの拘束を解くロックレバー鎖錠手段を備えたことを特徴とする回路しゃ断器の外部操作ハンドル装置。An external operation handle device that turns on and off a circuit breaker built in a switchboard etc. by manual operation from the outside of the panel. A lock lever is incorporated in the handle handle as a means to lock the rotary handle handle in the OFF position. The lock lever is pulled to the lock position at the handle handle OFF position, and the lock lever is locked at this position to lock the handle handle to the OFF position. An external operation handle device for a circuit breaker comprising: a lock lever locking means for restraining and holding the lock lever in a release position and releasing the lock lever by manual operation. 請求項1記載のハンドル装置において、ロックレバー鎖錠手段として、ロックレバーに設けた掛け穴に対向してハンドル把手に手動操作で係止を解く自動復帰形のレバー係止爪を組み込み、常時は係止爪を前記掛け穴に係合してロックレバーを釈放位置に係止保持し、ロックレバーを鎖錠位置へ移動する際に係止爪を手動操作で掛け穴から外すようにしたことを特徴とする回路しゃ断器の外部操作ハンドル装置。2. The handle device according to claim 1, wherein as a lock lever locking means, an automatic return type lever locking claw that unlocks the handle handle by manual operation is incorporated into the handle handle so as to face a hook hole provided in the lock lever. The locking claw is engaged with the hooking hole and the lock lever is locked and held in the release position, and the locking claw is manually removed from the hooking hole when the lock lever is moved to the locking position. An external operation handle device for a circuit breaker. 請求項1記載のハンドル装置において、ロックレバー鎖錠手段として、ロックレバーに設けたピン穴に対向してハンドル把手に手動操作で係止を解く自動復帰形のレバー係止ピンを組み込み、常時は係止ピンをばね付勢により前記ピン穴に差し込んでロックレバーを釈放位置に係止保持し、ロックレバーを鎖錠位置へ移動する際に係止ピンを手動操作でピン穴から引き出すようにしたことを特徴とする回路しゃ断器の外部操作ハンドル装置。2. The handle device according to claim 1, wherein a lock lever locking means is incorporated with an automatic return type lever locking pin that is manually operated to unlock the handle grip so as to face a pin hole provided in the lock lever. The lock pin is inserted into the pin hole by spring force and the lock lever is locked and held in the release position, and the lock pin is manually pulled out from the pin hole when moving the lock lever to the lock position. An external operation handle device for a circuit breaker. 請求項1記載のハンドル装置において、ロックレバー鎖錠手段として、ロックレバーの移動経路にレバーを釈放位置に拘束する自動復帰形のスライド式シャッタを備え、常時はシャッタをばね付勢により綴じてロックレバーを釈放位置に拘束保持し、ロックレバーを鎖錠位置に移動する際にシャッタを手動操作で退避位置に押し開くようにしたことを特徴とする回路しゃ断器の外部操作ハンドル装置。2. The handle device according to claim 1, wherein the lock lever locking means is provided with an automatic return type sliding shutter that restrains the lever at a release position in a movement path of the lock lever, and the shutter is normally bound and locked by a spring bias. An external operation handle device for a circuit breaker characterized in that the lever is restrained and held in the release position, and the shutter is manually pushed to the retracted position when the lock lever is moved to the lock position.
JP28950996A 1996-10-31 1996-10-31 External circuit handle device for circuit breaker Expired - Fee Related JP3711663B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28950996A JP3711663B2 (en) 1996-10-31 1996-10-31 External circuit handle device for circuit breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28950996A JP3711663B2 (en) 1996-10-31 1996-10-31 External circuit handle device for circuit breaker

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JPH10134693A JPH10134693A (en) 1998-05-22
JP3711663B2 true JP3711663B2 (en) 2005-11-02

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Publication number Priority date Publication date Assignee Title
CZ299548B6 (en) * 2002-09-16 2008-08-27 Oez S. R. O. Device for hand operation of electric appliances, particularly circuit breakers with locking of switchgear door
JP4127137B2 (en) 2003-07-03 2008-07-30 富士電機機器制御株式会社 External circuit handle device for circuit breaker
SG176346A1 (en) * 2010-06-04 2011-12-29 Schneider Electric South East Asia Hq Pte Ltd A switching device
FR3006498B1 (en) * 2013-05-31 2015-07-03 Alstom Technology Ltd DEVICE FOR CONTROLLING ELECTRICAL EQUIPMENT COMPRISING AXIAL NOTCHES
CN109509653B (en) * 2017-09-15 2022-07-19 Abb瑞士股份有限公司 Switching device and associated switch
IT201800000547A1 (en) * 2018-01-04 2019-07-04 Gewiss Spa ROTARY DISCONNECTOR WITH PADLOCKABLE CONTROL KNOB
CN109346347A (en) * 2018-10-15 2019-02-15 浙江天正智能电器有限公司 A kind of twin-lock structure and omnipotent breaker for omnipotent breaker
CN109830394A (en) * 2019-03-29 2019-05-31 国网河南省电力公司检修公司 Low-voltage air switch is dedicated to prevent maloperation lockset
CN113027251A (en) * 2019-12-24 2021-06-25 上海良信电器股份有限公司 Padlock device for outer handle of cabinet of electrical switch
FR3118838A1 (en) * 2021-01-08 2022-07-15 Schneider Electric Industries Sas Locking device for an electrical panel

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