JP3399301B2 - Circuit breaker - Google Patents
Circuit breakerInfo
- Publication number
- JP3399301B2 JP3399301B2 JP18350997A JP18350997A JP3399301B2 JP 3399301 B2 JP3399301 B2 JP 3399301B2 JP 18350997 A JP18350997 A JP 18350997A JP 18350997 A JP18350997 A JP 18350997A JP 3399301 B2 JP3399301 B2 JP 3399301B2
- Authority
- JP
- Japan
- Prior art keywords
- circuit breaker
- opening
- gas
- arc
- cover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
- H01H9/342—Venting arrangements for arc chutes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
- H01H9/342—Venting arrangements for arc chutes
- H01H2009/343—Venting arrangements for arc chutes with variable venting aperture function of arc chute internal pressure, e.g. resilient flap-valve or check-valve
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/02—Bases, casings, or covers
- H01H9/0264—Protective covers for terminals
Landscapes
- Breakers (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、回路遮断器が短
絡遮断動作時に接点間に発生するアークガスにより、回
路遮断器を取付ける配電盤等のパネル面へ地絡が発生す
るのを防止する地絡防止構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention prevents a ground fault from occurring in a panel surface of a switchboard or the like on which a circuit breaker is mounted due to an arc gas generated between contacts during a short circuit breaking operation of the circuit breaker. Regarding the structure.
【０００２】[0002]
【従来の技術】図２３は、例えば実公昭５４−３６２９
９号公報に示された従来の回路遮断器の地絡防止構造を
示す斜視図である。図において、１は回路遮断器、２は
端子等の接続作業用の開口部である。３は絶縁材料で形
成され、充電部の露出を避けるために設けられた端子カ
バーであり、取付ネジ４によって回路遮断器１に固定さ
れている。５は回路遮断器１が装着される配電盤（図示
せず）等のパネル面である。2. Description of the Related Art FIG.
It is a perspective view which shows the ground fault prevention structure of the conventional circuit breaker shown by the 9th publication. In the figure, 1 is a circuit breaker, and 2 is an opening for connecting work such as terminals. Reference numeral 3 denotes a terminal cover which is formed of an insulating material and is provided in order to avoid exposing the charging portion, and is fixed to the circuit breaker 1 by a mounting screw 4. Reference numeral 5 denotes a panel surface such as a switchboard (not shown) on which the circuit breaker 1 is mounted.
【０００３】[0003]
【発明が解決しようとする課題】上記のような従来の回
路遮断器の地絡防止構造では、開口部２とパネル面５と
の絶縁を確保するとともに、短絡遮断動作時に接点間に
発生するアークによるガスが開口部２から噴出してパネ
ル面５へ地絡するのを防止するために、回路遮断器１に
端子カバー３を取付ネジ４で取り付けており、部品点数
が増えるとともに、組立工数が増大するという問題点が
あった。また、短絡遮断動作時に接点間に発生するアー
クによるガスの圧力によって、この端子カバー３が外れ
て飛散し易いという問題点があった。In the conventional ground fault prevention structure for the circuit breaker as described above, the insulation between the opening 2 and the panel surface 5 is ensured, and the arc generated between the contacts during the short-circuit breaking operation. The terminal cover 3 is attached to the circuit breaker 1 with the attaching screw 4 in order to prevent the gas due to the gas from spouting from the opening 2 and grounding to the panel surface 5. Therefore, the number of parts is increased and the number of assembly steps is increased. There was a problem of increase. Further, there is a problem that the terminal cover 3 is easily detached and scattered due to the pressure of the gas due to the arc generated between the contacts during the short circuit breaking operation.
【０００４】この発明は、上述のような問題点を解決す
るためになされたものであり、部品点数が少ない構成
で、パネル面への地絡が防止できる回路遮断器を得る。
また、短絡遮断動作時に接点間に発生するアークによる
ガスの圧力によって、端子カバーが飛散し難い回路遮断
器を得ることを目的としている。The present invention has been made in order to solve the above-mentioned problems, and obtains a circuit breaker which has a small number of parts and which can prevent a ground fault on the panel surface.
Another object of the present invention is to obtain a circuit breaker in which the terminal cover is less likely to scatter due to the pressure of the gas generated by the arc generated between the contacts during the short circuit breaking operation.
【０００５】[0005]
【課題を解決するための手段】この発明に係る回路遮断
器においては、ベースとカバーよりなる絶縁筐体と、こ
の絶縁筐体の内部に収納された固定接触子と、この固定
接触子に対向して接離する可動接触子と、この可動接触
子が開離時に発生するアークが充満するアーク発生室
と、このアーク発生室に配設され上記アークを消弧する
消弧装置と、上記アーク発生室からのアークガスを上記
絶縁筐体の外部へ排出する排気孔と、この排気孔と交差
する方向に上記カバーに設けられた端子接続作業用の開
口部とを備え、上記カバーは熱可塑性樹脂材料で形成さ
れ、開口部近傍に回路遮断器が短絡遮断動作時にアーク
発生室から排出されたガスが開口部方向へ流出するのを
制限し排気孔の方向へ導く邪魔板をカバーと一体に設け
たものである。In a circuit breaker according to the present invention, an insulating casing composed of a base and a cover, a fixed contactor housed inside the insulating casing, and a fixed contactor facing the fixed contactor are provided. And a movable contactor that comes into contact with and separates from each other, an arc generating chamber that is filled with an arc generated when the movable contactor is separated, an arc extinguishing device that is arranged in the arc generating chamber to extinguish the arc, and the arc. Above the arc gas from the generation chamber
The cover is provided with an exhaust hole for discharging to the outside of the insulating housing, and an opening for terminal connection work provided in the cover in a direction intersecting with the exhaust hole, the cover being formed of a thermoplastic resin material. arc during short-circuit breaking operation circuit breaker in the vicinity
In which the gas discharged or chambers et al. Provided integrally with the cover baffles for guiding the direction of the limit from flowing into the opening direction the exhaust hole.
【０００６】また、邪魔板は、開口部の入口近傍に設け
たものである。The baffle plate is provided near the entrance of the opening.
【０００７】また、邪魔板は、バリヤに対向して配設さ
れ、短絡遮断動作時にはガスの流れにより開口部近傍ま
で弾性変形し、ガスが開口部方向へ流出するのを制限す
るようにしたものである。Further, the baffle is disposed so as to face the barrier, and is elastically deformed to the vicinity of the opening by the flow of the gas at the time of the short-circuit breaking operation so as to limit the outflow of the gas toward the opening. Is.
【０００８】邪魔板は、アーク発生室と排気孔の間に設
けられたバリヤに対向して配設され、短絡遮断動作時に
はガスの流れにより開口部近傍まで弾性変形し、ガスが
開口部方向へ流出するのを制限するようにしたものであ
る。The baffle plate is provided between the arc generating chamber and the exhaust hole.
It is arranged so as to face the eroded barrier and is elastically deformed to the vicinity of the opening by the flow of the gas during the short-circuit breaking operation so that the gas is restricted from flowing out toward the opening.
【０００９】また、邪魔板は、ガスの流れにより開口部
近傍まで弾性変形する途中でガス入口側端面と係合し開
口部を閉塞する長さとしたものである。The baffle plate is of a length that engages with the end face on the gas inlet side and closes the opening while being elastically deformed to the vicinity of the opening by the flow of gas.
【００１０】また、邪魔板は、開口部のガス入口側端面
に弾性を有して当接する邪魔板を設けたものである。Further, the baffle plate is provided with a baffle plate which has elasticity and comes into contact with the gas inlet side end surface of the opening.
【００１１】また、邪魔板に弾性を有する一部薄肉部を
設けたものである。Further, the baffle plate is provided with a partially thin wall portion having elasticity.
【００１２】また、ベースとカバーよりなる絶縁筐体
と、この絶縁筐体の内部に収納された固定接触子と、こ
の固定接触子に対向して接離する可動接触子と、この可
動接触子が開離時に発生するアークが充満するアーク発
生室と、上記アーク発生室からのアークガスを上記絶縁
筐体の外部へ排出する排気孔と、この排気孔と交差する
方向に上記カバーに設けられた端子接続作業用の開口部
とを備え、上記カバーは熱硬化性樹脂材料で形成され、
このカバーの開口部近傍に形成された凹部と、回路遮断
器が短絡遮断動作時にアーク発生室から排出されたガス
が開口部方向へ流出するのを制限し排気孔の方向へ導く
熱可塑性樹脂材料からなり可撓性を有する邪魔板の一端
を凹部に係合させて設けたものである。[0012] Further, an insulating casing composed of a base and a cover, a fixed contactor housed in the insulating casing, a movable contactor which faces the fixed contactor and separates from the fixed contactor, and the movable contactor. Is provided in the cover in a direction intersecting with the arc generation chamber filled with the arc generated at the time of opening, the exhaust gas for discharging the arc gas from the arc generation chamber to the outside of the insulating casing, and the direction intersecting the exhaust hole. An opening for connecting terminals is provided, and the cover is formed of a thermosetting resin material,
A recess formed near the opening of the cover and a thermoplastic resin material that restricts the gas discharged from the arc generating chamber from flowing toward the opening when the circuit breaker short-circuits and shuts off and guides the gas toward the exhaust hole. The flexible baffle plate is formed by engaging one end with the recess.
【００１３】[0013]
実施の形態１．図１〜図３はこの発明の実施の形態１で
ある回路遮断器の地絡防止構造を示す図であり、図１は
回路遮断器の端子カバーを取外した状態を示す斜視図、
図２は図１の線IIーIIに沿う要部拡大断面図、図３は図
２の要部拡大平面図である。Embodiment 1. 1 to 3 are views showing a ground fault prevention structure of a circuit breaker according to Embodiment 1 of the present invention, and FIG. 1 is a perspective view showing a state in which a terminal cover of the circuit breaker is removed,
2 is an enlarged sectional view of an essential part taken along line II-II of FIG. 1, and FIG. 3 is an enlarged plan view of an essential part of FIG.
【００１４】図において、１０は回路遮断器本体であ
る。１１は絶縁筐体であるベースであり、例えば熱硬化
性樹脂材料で形成されている。１２はベース１１に装着
された固定接触子、１２ａは固定接触子１２に固着され
た固定接点、１２ｂは固定接触子１２に固着されたアー
クランナである。１３は開閉機構（図示せず）の開閉動
作に応動し、固定接点１２ａに対向して接離する可動接
点１３ａを有する可動接触子である。１４は固定接点１
２ａと可動接点１３ａ間に発生するアークを消弧する消
弧装置である。In the figure, 10 is a circuit breaker body. Reference numeral 11 denotes a base that is an insulating housing, and is formed of, for example, a thermosetting resin material. Reference numeral 12 is a fixed contact mounted on the base 11, 12a is a fixed contact fixed to the fixed contact 12, and 12b is an arc runner fixed to the fixed contact 12. Reference numeral 13 denotes a movable contactor having a movable contact 13a which responds to the opening / closing operation of an opening / closing mechanism (not shown) and faces the fixed contact 12a to come into contact with and separate from the fixed contact 12a. 14 is a fixed contact 1
It is an arc extinguishing device that extinguishes the arc generated between 2a and the movable contact 13a.
【００１５】１５はカバーであり、弾性を有する絶縁材
料例えば熱可塑性樹脂材料で形成され、端子などの接続
作業用の開口部１５ａと、回路遮断器が短絡遮断動作時
に発生するガスを絶縁筐体の外部へ排気するための排気
孔１５ｂと、比較的薄肉の邪魔板１５ｃが一体に形成さ
れている。１６は接点間に発生したアークによるガスが
充満し、かつ消弧装置１４により消弧されるアーク発生
室、１７はアーク発生室１６と室外とを隔絶する複数の
ガス排気孔１７ａを有したバリヤである。Reference numeral 15 denotes a cover, which is made of an elastic insulating material, for example, a thermoplastic resin material, and has an opening 15a for connecting terminals and the like, and an insulating casing for gas generated when the circuit breaker performs a short circuit breaking operation. An exhaust hole 15b for exhausting the air to the outside and a relatively thin baffle plate 15c are integrally formed. Reference numeral 16 denotes an arc generating chamber filled with gas generated by the arc generated between the contacts and extinguished by the arc extinguishing device 14. Reference numeral 17 denotes a barrier having a plurality of gas exhaust holes 17a for separating the arc generating chamber 16 from the outside. Is.
【００１６】１８は回路遮断器本体１０と外部の電気回
路とを接続する電源側端子、１８ａは固定接触子１２と
電源側端子１８とを接続する中間端子である。１９は絶
縁材料で形成され、充電部の露出を避けるために設けら
れた端子カバーであり、回路遮断器本体１０の開口部１
５ａおよび電源側端子１８を覆うように、取付けねじ４
により取付けられ（図１１に示す）、回路遮断器本体１
０が装着される配電盤（図示せず）等のパネル５面への
ガスによる地絡を防止するものである。Reference numeral 18 is a power source side terminal for connecting the circuit breaker body 10 to an external electric circuit, and 18a is an intermediate terminal for connecting the fixed contact 12 and the power source side terminal 18. Reference numeral 19 denotes a terminal cover which is formed of an insulating material and is provided in order to avoid exposing the charging part.
5a and the power supply side terminal 18 so as to cover the mounting screw 4
Attached (shown in FIG. 11) by the circuit breaker body 1
This is to prevent a ground fault due to gas to the surface of the panel 5 such as a switchboard (not shown) to which 0 is mounted.
【００１７】次に、電源側端子１８に端子ネジ７０を締
付ける場合には、図４に示すように、開口部１５ａから
ドライバー７１を挿入すると、邪魔板１５ｃは二点鎖線
で示す位置まで変形しねじ締めが可能となり、ドライバ
ー７１を抜き去ると邪魔板１５ｃは再び実線で示す位置
に弾力性を持って復帰し、開口部１５ａを遮蔽する。Next, when tightening the terminal screw 70 on the power source side terminal 18, as shown in FIG. 4, when the driver 71 is inserted through the opening 15a, the baffle plate 15c is deformed to the position shown by the chain double-dashed line. The screws can be tightened, and when the driver 71 is removed, the baffle plate 15c elastically returns to the position indicated by the solid line again to shield the opening 15a.
【００１８】このように構成された回路遮断器において
は、図２に示すように回路遮断器が短絡遮断動作時に固
定接点１２ａと可動接点１３ａ間に発生したアークによ
るガスは、アーク発生室１６からバリヤ１７のガス排気
孔１７ａを通り、開口部１５ａおよび排気孔１５ｂに向
かって噴出するが、邪魔板１５ｃにより開口部１５ａ方
向へのガスの流れが制限され、ガスの大部分は排気孔１
５ｂに導かれ外部へ排出される。In the circuit breaker configured as described above, as shown in FIG. 2, the gas generated by the arc generated between the fixed contact 12a and the movable contact 13a during the short circuit breaking operation of the circuit breaker is discharged from the arc generating chamber 16. Although the gas is ejected toward the opening 15a and the exhaust hole 15b through the gas exhaust hole 17a of the barrier 17, the flow of the gas toward the opening 15a is restricted by the baffle plate 15c, and most of the gas is exhausted from the exhaust hole 1a.
It is guided to 5b and discharged to the outside.
【００１９】この実施の形態１によれば、短絡遮断動作
時に固定接点１２ａと可動接点１３ａ間に発生し、アー
ク発生室１６からバリヤ１７のガス排気孔１７ａを通り
噴出したガスは、その大部分は邪魔板１５ｃにより排気
孔１５ｂの方向に誘導され、開口部１５ａの方向へ殆ど
噴出しなくなるので、カバー１５のみでもパネル５面へ
の地絡防止が可能となる。According to the first embodiment, most of the gas generated between the fixed contact 12a and the movable contact 13a during the short-circuit breaking operation and ejected from the arc generating chamber 16 through the gas exhaust hole 17a of the barrier 17 is generated. Is guided toward the exhaust hole 15b by the baffle plate 15c and hardly blows out toward the opening 15a, so that the cover 15 alone can prevent a ground fault on the panel 5 surface.
【００２０】また、端子カバー１９が必要な場合でも、
開口部１５ａへのガスの流れが制限されるために、開口
部１５ａから噴出するガスの圧力によって端子カバー１
９が飛散し難くなる。また、通常の使用状態において
も、回路遮断器の電源側端子１８が開口部１５ａから見
え難くなるため、充電部の露出を避けるために使用する
端子カバーが不要になる。Even if the terminal cover 19 is required,
Since the gas flow to the opening 15a is restricted, the pressure of the gas ejected from the opening 15a causes the terminal cover 1
9 is less likely to scatter. Further, even in a normal use state, the power supply side terminal 18 of the circuit breaker becomes difficult to be seen from the opening 15a, so that the terminal cover used for avoiding the exposure of the charging portion becomes unnecessary.
【００２１】実施の形態２．図５はこの発明の実施の形
態２を示す回路遮断器の地絡防止構造の要部拡大断面
図、図６は図５の要部拡大側面図、図７は図５の回路遮
断器が短絡遮断動作した状態を示す要部拡大断面図であ
る。Embodiment 2. 5 is an enlarged sectional view of an essential part of a ground fault prevention structure for a circuit breaker showing Embodiment 2 of the present invention, FIG. 6 is an enlarged side view of an essential part of FIG. 5, and FIG. 7 is a short circuit of the circuit breaker of FIG. It is a principal part expanded sectional view which shows the state which carried out the interruption | blocking operation.
【００２２】図５〜図７において、１１〜１４、１６〜
１９は上記実施の形態１と同様のものであり、その説明
を省略する。２０は回路遮断器本体である。２５はカバ
ーであり、弾性を有する絶縁材料例えば熱可塑性樹脂材
料で形成され、端子等の接続作業用の開口部２５ａと、
回路遮断器が短絡遮断動作時に固定接点１２ａと可動接
点１３ａ間に発生するアークによるガスを外部へ排気す
るための排気孔２５ｂと、比較的薄肉の邪魔板２５ｃが
一体に形成されている。また、邪魔板２５ｃは、図６に
示すように弾性変形し易いように両端にスリット２５ｄ
を設けている。5 to 7, 11 to 14 and 16 to
Reference numeral 19 is the same as that in the first embodiment, and the description thereof is omitted. Reference numeral 20 is a circuit breaker body. Reference numeral 25 denotes a cover, which is made of an insulating material having elasticity, for example, a thermoplastic resin material, and has an opening portion 25a for connecting work such as terminals,
A relatively thin baffle plate 25c is integrally formed with an exhaust hole 25b for exhausting gas generated by an arc generated between the fixed contact 12a and the movable contact 13a to the outside when the circuit breaker performs a short-circuit breaking operation. Further, the baffle plate 25c has slits 25d at both ends so that the baffle plate 25c is easily elastically deformed as shown in FIG.
Is provided.
【００２３】このように構成された回路遮断器において
は、図７に示すように回路遮断器の短絡遮断動作時に固
定接点１２ａと可動接点１３ａに発生したアークによる
ガスは、アーク発生室１６からバリヤ１７のガス排気孔
１７ａを通り、開口部２５ａおよび排気孔２５ｂに向か
って噴出するが、ガスの圧力により薄肉の邪魔板２５ｃ
は、カバー２１の根元部Ａを中心にして開口部２１ａの
方向に弾性変形する。これにより、開口部２５ａ方向へ
のガスの流れが制限され、ガスの大部分は排気孔２５ｂ
に導かれる。In the circuit breaker configured as described above, as shown in FIG. 7, the gas generated by the arc generated at the fixed contact 12a and the movable contact 13a during the short circuit breaking operation of the circuit breaker is discharged from the arc generating chamber 16 to the barrier. Although it is ejected toward the opening 25a and the exhaust hole 25b through the gas exhaust hole 17a of 17, the thin baffle plate 25c is formed by the pressure of the gas.
Is elastically deformed in the direction of the opening 21a around the root portion A of the cover 21. This restricts the flow of gas toward the opening 25a, and most of the gas is exhausted through the exhaust hole 25b.
Be led to.
【００２４】この実施の形態２によれば、従来装置にお
いて短絡遮断動作時に固定接点１２ａと可動接点１３ａ
に発生し開口部２５ａの方向に直接噴出していたガス
は、邪魔板２５ｃにより排気孔２５ｂの方向に誘導さ
れ、カバー２５のみでもパネル５面への地絡防止が可能
となる。また、端子カバー１９が必要な場合でも、開口
部２５ａへのガスの流れが制限されるため、開口部２５
ａから噴出するガスの圧力によって端子カバー１９が飛
散し難くなる。According to the second embodiment, in the conventional device, the fixed contact 12a and the movable contact 13a are operated during the short circuit breaking operation.
The gas that has been generated and is directly ejected in the direction of the opening 25a is guided by the baffle plate 25c in the direction of the exhaust hole 25b, and the cover 25 alone can prevent the ground fault on the surface of the panel 5. Further, even when the terminal cover 19 is needed, the flow of gas to the opening 25a is restricted, so that the opening 25a
The terminal cover 19 is less likely to scatter due to the pressure of the gas ejected from a.
【００２５】実施の形態３．図８は、この発明の実施の
形態３を示す回路遮断器の地絡防止構造の要部拡大断面
図である。図において、１１〜１４、１６〜１９は上記
実施の形態１と同様のものであり、その説明を省略す
る。２８はストッパであり、邪魔板１５ｃの先端部が当
接するように、カバー１５の開口部１５ａに固着されて
いる。Embodiment 3. 8 is an enlarged cross-sectional view of a main part of a ground fault prevention structure for a circuit breaker showing a third embodiment of the present invention. In the figure, 11 to 14 and 16 to 19 are the same as those in the first embodiment, and the description thereof will be omitted. Reference numeral 28 denotes a stopper, which is fixed to the opening 15a of the cover 15 so that the tip of the baffle plate 15c abuts.
【００２６】この実施の形態３によれば、ストッパ２８
を設けたので、圧力の高いガスの噴出により邪魔板１５
ｃが変形しようとしてもストッパ２８により阻止され、
邪魔板１５ｃの異常な変形が防止できるとともに、端子
カバー１９が飛散し難くなる。According to the third embodiment, the stopper 28
The baffle plate 15 is provided by the ejection of high pressure gas.
Even if c is deformed, it is blocked by the stopper 28,
It is possible to prevent abnormal deformation of the baffle plate 15c and prevent the terminal cover 19 from scattering.
【００２７】実施の形態４．図９は、この発明の実施の
形態４を示す回路遮断器の地絡防止構造の要部拡大断面
図である。図において、１１〜１４、１６〜１９、２
０、２５は上記実施の形態２と同様のものであり、その
説明を省略する。２８はストッパであり、邪魔板２５ｃ
の先端部が当接するように、カバー２５の開口部２５ａ
に固着されている。Fourth Embodiment 9 is an enlarged cross-sectional view of a main part of a ground fault prevention structure for a circuit breaker showing a fourth embodiment of the present invention. In the figure, 11-14, 16-19, 2
Nos. 0 and 25 are the same as those in the second embodiment, and description thereof will be omitted. 28 is a stopper, which is a baffle plate 25c
Opening 25a of the cover 25 so that the tip of the
Is stuck to.
【００２８】この実施の形態４によれば、ストッパ２８
を設けたので、圧力の高いガスが噴出して邪魔板２１ｃ
が変形しても、二点鎖線で示すようにストッパ２８によ
り阻止され、邪魔板２１ｃの異常な変形が防止できると
ともに、端子カバー１９が飛散し難くなる。According to the fourth embodiment, the stopper 28
Since the high pressure gas is ejected, the baffle plate 21c is provided.
Even if it is deformed, it is blocked by the stopper 28 as shown by the chain double-dashed line, abnormal deformation of the baffle plate 21c can be prevented, and the terminal cover 19 does not easily scatter.
【００２９】実施の形態５．図１０は、この発明の実施
の形態５を示す回路遮断器の地絡防止構造の要部拡大断
面図、図１１は図１０の要部拡大側面図、図１２は図１
０の回路遮断器が短絡遮断動作した状態を示す要部拡大
断面図である。Embodiment 5. 10 is an enlarged cross-sectional view of an essential part of a ground fault prevention structure for a circuit breaker showing a fifth embodiment of the present invention, FIG. 11 is an enlarged side view of the essential part of FIG. 10, and FIG.
It is a principal part expanded sectional view which shows the state which the circuit breaker of 0 performed the short circuit interruption operation.
【００３０】図において、１１〜１４、１６〜１９は上
記実施の形態１と同様のものであり、その説明を省略す
る。３０は回路遮断器本体である。３５はカバーであ
り、弾性を有する絶縁材料例えば熱可塑性樹脂材料で形
成され、端子等の接続作業用の開口部３５ａと、回路遮
断器が短絡遮断動作時に固定接点１２ａと可動接点１３
ａに発生するアークによるガスを外部へ排気するための
排気孔３５ｂと、比較的薄肉の邪魔板３５ｃが一体に形
成されている。In the figure, 11 to 14 and 16 to 19 are the same as those in the first embodiment, and the description thereof will be omitted. Reference numeral 30 is a circuit breaker body. Reference numeral 35 denotes a cover, which is formed of an insulating material having elasticity, for example, a thermoplastic resin material, and has an opening 35a for connecting work such as terminals and the fixed contact 12a and the movable contact 13 when the circuit breaker performs a short-circuit breaking operation.
An exhaust hole 35b for exhausting gas due to the arc generated in a to the outside and a relatively thin baffle plate 35c are integrally formed.
【００３１】また、邪魔板３５ｃは、図１１に示すよう
に、弾性変形し易いように両端にスリット３５ｄを設け
ている。また、薄肉の邪魔板３５ｃの根元部３５ｆから
先端３５ｇまでの長さＬは、短絡遮断動作時のガス圧に
より、邪魔板３５ｃが排気孔３５ｂの端面３５ｅに当接
するように開口部３５ａの内径Ｄより若干長めに成形さ
れている。Further, as shown in FIG. 11, the baffle plate 35c is provided with slits 35d at both ends so as to be easily elastically deformed. In addition, the length L from the root portion 35f to the tip end 35g of the thin baffle plate 35c is determined by the gas pressure during the short circuit breaking operation so that the baffle plate 35c abuts the end surface 35e of the exhaust hole 35b. It is slightly longer than D.
【００３２】この実施の形態５によれば、図１２に示す
ごとく回路遮断器が短絡遮断動作時に接点間に発生する
ガスの圧力により、薄肉の弾性材料で成形された邪魔板
３５ａが、カバー３５の根元部３５ｆを中心として開口
部３５ａの方向に弾性変形する。この弾性変形時におい
て、邪魔板３５ｃは開口部３５ａのガス入口側の端面３
５ｅ以上に開口部３５ａの方向に弾性変形するようなガ
ス圧の場合でも、端面３５ｅに当接して、それ以上開口
部３５ａの方向に撓まないので、実施の形態１〜４の回
路遮断器よりも、ガスの流れを効率よく排気孔３５ｂへ
誘導し、開口部３５ａへのガスの噴出を阻止し、端子カ
バー１９の飛散を防止する。なお、端子カバー１９を取
付けなくても、カバー３５のみでパネル５面への地絡を
防止する効果が大きい。According to the fifth embodiment, as shown in FIG. 12, the baffle plate 35a formed of a thin elastic material is covered with the cover 35 by the pressure of the gas generated between the contacts when the circuit breaker performs the short circuit breaking operation. Elastically deforms in the direction of the opening 35a with the root portion 35f as the center. During this elastic deformation, the baffle plate 35c is provided on the gas inlet side end surface 3 of the opening 35a.
Even if the gas pressure is such that it is elastically deformed in the direction of the opening 35a by more than 5e, it does not bend in the direction of the opening 35a by coming into contact with the end surface 35e. Rather, the flow of gas is efficiently guided to the exhaust hole 35b, the ejection of gas to the opening 35a is blocked, and the terminal cover 19 is prevented from scattering. Even if the terminal cover 19 is not attached, the cover 35 alone has a great effect of preventing a ground fault on the surface of the panel 5.
【００３３】実施の形態６．図１３〜図１８はこの発明
の実施の形態６である回路遮断器の地絡防止構造を示す
図であり、図１３は回路遮断器を示す斜視図、図１４は
図１３の線XIVーXIVに沿う要部拡大断面図、図１５は邪
魔板を開口部の内側へ挿入する方法を示す説明図、図１
６は端子ネジを締付ける方法を示す要部拡大断面図、図
１７は要部拡大平面図である。図１８は図１３の回路遮
断器が短絡遮断動作した状態を示す要部拡大断面図であ
る。Sixth Embodiment 13 to 18 are views showing a ground fault prevention structure of a circuit breaker according to a sixth embodiment of the present invention, FIG. 13 is a perspective view showing the circuit breaker, and FIG. 14 is a line XIV-XIV of FIG. 1 is an enlarged cross-sectional view of the main part along the line, FIG. 15 is an explanatory view showing a method of inserting the baffle plate into the inside of the opening,
6 is an enlarged sectional view of an essential part showing a method for tightening the terminal screw, and FIG. 17 is an enlarged plan view of the essential part. FIG. 18 is an enlarged cross-sectional view of an essential part showing a state in which the circuit breaker of FIG. 13 performs a short circuit breaking operation.
【００３４】図において、１１〜１４、１６〜１８は上
記実施の形態１と同様のものであり、その説明を省略す
る。４０は遮断器本体である。４５はカバーであり、弾
性を有する絶縁材料例えば熱可塑性樹脂材料で形成さ
れ、端子等の接続作業用の開口部４５ａと、回路遮断器
が短絡遮断動作時に固定接点１２ａと可動接点１３ａ間
に発生するアークによる発生するガスを外部へ排気する
ための排気孔４５ｂと、比較的薄肉の邪魔板４５ｃが形
成されている。また、薄肉の邪魔板４５ｃの根元部４５
ｆから先端部４５ｇまでの長さＬは、短絡遮断動作時の
ガス圧により、邪魔板４５ｃが排気孔４５ｂの端面４５
ｅに当接するように開口部４５ａの内径Ｄより若干長め
に成形されている。In the figure, 11 to 14 and 16 to 18 are the same as those in the first embodiment, and the description thereof will be omitted. Reference numeral 40 is a circuit breaker body. Reference numeral 45 denotes a cover, which is formed of an insulating material having elasticity, for example, a thermoplastic resin material, and which is formed between the fixed contact 12a and the movable contact 13a when the short circuit breaker operates and the opening 45a for connecting work such as terminals. An exhaust hole 45b for exhausting the gas generated by the arc to the outside and a relatively thin baffle plate 45c are formed. In addition, the base portion 45 of the thin baffle plate 45c
The length L from f to the tip portion 45g depends on the gas pressure at the time of the short circuit breaking operation, so that the baffle plate 45c causes the end face 45 of the exhaust hole 45b.
It is formed to be slightly longer than the inner diameter D of the opening 45a so as to come into contact with e.
【００３５】邪魔板４５ｃを開口部４５ａの内側へ組込
む方法は、図１５に示すように、開口部４５ａの上端面
４５ｈ上に例えば丸棒４７を置き、この丸棒４７に沿わ
せて邪魔板４５ｃを変形させ、先端部４５ｇが開口部４
５ａに当接後に丸棒４７を抜き去り、矢印方向から邪魔
板４５ｃを押し込むことにより、邪魔板４５ｃは二点鎖
線で示す位置に開口部４５ａのガス入口側の端面４５ｅ
に常に弾力性を持って当接する。As shown in FIG. 15, for example, a round bar 47 is placed on the upper end surface 45h of the opening 45a, and the baffle plate 45c is installed along the round bar 47 as shown in FIG. 45c is deformed so that the tip 45g has the opening 4
After abutting against 5a, the round bar 47 is pulled out and the baffle plate 45c is pushed in from the direction of the arrow, so that the baffle plate 45c is located at the position shown by the chain double-dashed line and the end face 45e of the opening 45a on the gas inlet side.
Always has elastic contact with.
【００３６】次に、電源側端子１８に端子ネジ７０を締
付ける場合には、図１６に示すように、開口部４５ａか
らドライバー７１を挿入すると、邪魔板４５ｃは二点鎖
線で示す位置まで変形しねじ締めが可能となり、ドライ
バー７１を抜き去ると邪魔板４５ｃは再び実線で示す位
置に弾力性を持って復帰し、開口部４５ａを遮蔽する。Next, when the terminal screw 70 is tightened to the power source side terminal 18, as shown in FIG. 16, when the driver 71 is inserted from the opening 45a, the baffle plate 45c is deformed to the position shown by the chain double-dashed line. The screws can be tightened, and when the driver 71 is removed, the baffle plate 45c elastically returns to the position indicated by the solid line again to shield the opening 45a.
【００３７】この実施の形態６によれば、図１８に示す
ように、邪魔板４５ｃが開口部４５ａのガス入口側の端
面４５ｅに弾性を有して当接しているために、開口部４
５ａへのガスの漏れが少なくなりガスの流れを効率よく
排気孔４５ｄへ誘導し、開口部４５ａへのガスの噴出を
阻止するので、端子カバーを取付けなくてカバーのみで
パネル面への地絡を防止できる。また、通常使用状態で
は回路遮断器の電源側端子１８が開口部４５ａから見え
なくなるために、電源側端子１８に人が接触し難くな
り、従来装置のような端子カバーが不要になる。According to the sixth embodiment, as shown in FIG. 18, since the baffle plate 45c elastically abuts the end face 45e of the opening 45a on the gas inlet side, the opening 4a is opened.
Gas leakage to 5a is reduced, the gas flow is efficiently guided to the exhaust hole 45d, and the ejection of gas to the opening 45a is blocked. Therefore, the terminal cover is not attached, and only the cover is grounded to the panel surface. Can be prevented. In addition, since the power supply side terminal 18 of the circuit breaker is not visible from the opening 45a in a normal use state, it is difficult for a person to contact the power supply side terminal 18, and the terminal cover unlike the conventional device is unnecessary.
【００３８】実施の形態７．図１９は、この発明の実施
の形態７を示す回路遮断器の地絡防止構造の要部拡大断
面図である。図において、１１〜１４、１６〜１９、３
０、３５は上記実施の形態５と同様なものであり、その
説明を省略する。３５ｈは邪魔板３５ｃのカバー３５と
つながる部分に、弾性変形し易いように局所的に形成さ
れた薄肉部である。Embodiment 7. FIG. 19 is an enlarged cross-sectional view of a main part of a ground fault prevention structure for a circuit breaker showing a seventh embodiment of the present invention. In the figure, 11-14, 16-19, 3
Reference numerals 0 and 35 are the same as those in the fifth embodiment, and the description thereof will be omitted. Reference numeral 35h denotes a thin portion locally formed in a portion of the baffle plate 35c connected to the cover 35 so as to be easily elastically deformed.
【００３９】この実施の形態７によれば、回路遮断器が
短絡遮断動作時に発生するガスの圧力により、局所的な
薄肉部３５ｈが弾性変形するため、邪魔板３５ｃは薄肉
部３５ｈを中心に開口部３５ａの方向に速やかに湾曲す
る。この弾性変形時に、邪魔板３５ｃが排気孔の端面３
５ｅに押し付けられることで、ガスの流れは排気孔３５
bの方向に誘導され、実施の形態５と同等の効果を得る
ことができる。According to the seventh embodiment, the local thin portion 35h elastically deforms due to the gas pressure generated when the circuit breaker performs the short-circuit breaking operation, so that the baffle plate 35c opens around the thin portion 35h. It quickly curves in the direction of the portion 35a. During this elastic deformation, the baffle plate 35c causes the end face 3 of the exhaust hole to move.
By being pressed against the 5e, the flow of gas is changed to the exhaust hole 35.
By being guided in the direction of b, the same effect as that of the fifth embodiment can be obtained.
【００４０】実施の形態８．図２０は、この発明の実施
の形態８を示す回路遮断器の地絡防止構造の要部拡大断
面図である。図において、１１〜１４、１６〜１８、４
０、４５は上記実施の形態５と同様なものであり、その
説明を省略する。４５ｈは邪魔板４５ｃのカバー４５と
つながる部分に、弾性変形し易いように局所的に形成さ
れた薄肉部である。Embodiment 8. 20 is an enlarged cross-sectional view of a main part of a ground fault prevention structure for a circuit breaker showing an eighth embodiment of the present invention. In the figure, 11-14, 16-18, 4
0 and 45 are the same as those in the fifth embodiment, and the description thereof will be omitted. Reference numeral 45h is a thin portion locally formed in a portion of the baffle plate 45c connected to the cover 45 so as to be easily elastically deformed.
【００４１】この実施の形態８によれば、局所的な薄肉
部４５ｈが弾性変形するために、図１５に示すと同様な
方法で邪魔板４５ｃを開口部４５ａの内側へ組込む場合
に、邪魔板４５ｃの組込み作業が容易になるとともに、
回路遮断器の短絡遮断動作時に発生するガスの圧力によ
り、邪魔板４５ｃは薄肉部４５ｈを中心に開口部４５ａ
の方向に速やかに湾曲する。この弾性変形時に、邪魔板
４５ｃが開口部４５ａのガス入口側の端面４５ｅに押し
付けられることで、ガスの流れは排気孔４５bの方向に
誘導され、実施の形態６と同様の効果を得ることができ
る。According to the eighth embodiment, since the locally thin portion 45h elastically deforms, when the baffle plate 45c is assembled inside the opening 45a by the same method as shown in FIG. Assembling work of 45c becomes easy,
Due to the pressure of the gas generated during the short circuit breaking operation of the circuit breaker, the baffle plate 45c has an opening 45a around the thin wall 45h.
Bends rapidly in the direction of. During this elastic deformation, the baffle plate 45c is pressed against the end face 45e of the opening 45a on the gas inlet side, so that the gas flow is guided in the direction of the exhaust hole 45b, and the same effect as that of the sixth embodiment can be obtained. it can.
【００４２】実施の形態９．図２１はこの発明の実施の
形態９を示す回路遮断器の地絡防止構造の要部拡大断面
図である。図において、１１〜１４、１６〜１８は上記
実施の形態１と同様なものであり、その説明を省略す
る。５５はカバーであり、例えば熱硬化性樹脂材料で形
成され、端子などの接続作業用の開口部５５ａと、回路
遮断器が短絡遮断動作時に接点間に発生するガスを排気
するための排気孔５５ｂと、後記する邪魔板６０を嵌着
する凹部５５ｃが形成されている。Ninth Embodiment FIG. 21 is an enlarged cross-sectional view of a main part of a ground fault prevention structure for a circuit breaker showing a ninth embodiment of the present invention. In the figure, 11 to 14 and 16 to 18 are the same as those in the first embodiment, and the description thereof will be omitted. Reference numeral 55 denotes a cover, which is formed of, for example, a thermosetting resin material, has an opening 55a for connecting work such as terminals, and an exhaust hole 55b for exhausting gas generated between the contacts when the circuit breaker performs a short circuit breaking operation. And, a recess 55c into which a baffle plate 60 described later is fitted is formed.
【００４３】邪魔板６０は図２２に示すようなＬ字状に
熱可塑性樹脂材料で形成され、図２１に示すように支持
部６０ａを凹部５５ｃに挿入し抜出さないように嵌着
し、腕部６０ｂの先端を湾曲させて開口部５５ａの内側
に挿入し、開口部５５ａのガス入口側の端面５５ｅを押
圧するように当接させている。なお、熱硬化性樹脂材料
で形成されたカバー５５の開口部５５ａを遮蔽する邪魔
板６０を設けたので、端子等を接続作業時には図１６に
示すと同様な方法でドライバー等で押し開き、接続作業
が終わると邪魔板６０の弾性力により開口部５５ａを遮
蔽することができる。The baffle plate 60 is made of a thermoplastic resin material in an L shape as shown in FIG. 22, and as shown in FIG. 21, the support portion 60a is inserted into the concave portion 55c and fitted so as not to be pulled out. The tip of the portion 60b is curved and inserted into the inside of the opening 55a, and the end surface 55e of the opening 55a on the gas inlet side is pressed and brought into contact therewith. In addition, since the baffle plate 60 that shields the opening 55a of the cover 55 formed of the thermosetting resin material is provided, the terminals and the like are pushed open by a screwdriver or the like in the same manner as shown in FIG. When the work is finished, the opening 55a can be shielded by the elastic force of the baffle plate 60.
【００４４】この実施の形態９によれば、熱硬化性樹脂
材料で形成されたカバーを備えた回路遮断器でも、邪魔
板６０が開口部５５ａのガス入口側の端面５５ｅに弾性
を有して当接しているために、開口部５５ａへのガスの
漏れが少なくなりガスの流れを効率よく排気孔５５ｄへ
誘導し、開口部５５ａへのガスの噴出を阻止するので、
端子カバーを取付けなくてカバーのみでパネル面への地
絡を防止できる。また、通常使用状態では回路遮断器の
電源側端子１８が開口部５５ａから見えなくなるため
に、電源側端子１８に人が接触し難くなり、従来装置の
ような端子カバーが不要になる。According to the ninth embodiment, even in the circuit breaker having the cover made of the thermosetting resin material, the baffle plate 60 has elasticity on the end surface 55e of the opening 55a on the gas inlet side. Since they are in contact with each other, the gas leakage to the opening 55a is reduced, the gas flow is efficiently guided to the exhaust hole 55d, and the ejection of gas to the opening 55a is prevented.
Without installing the terminal cover, it is possible to prevent the ground fault to the panel surface only with the cover. In addition, since the power supply side terminal 18 of the circuit breaker cannot be seen through the opening 55a in a normal use state, it is difficult for a person to contact the power supply side terminal 18, and the terminal cover unlike the conventional device is not necessary.
【００４５】[0045]
【発明の効果】この発明は、以上説明したように構成さ
れているので、以下に示すような効果を奏する。Since the present invention is constructed as described above, it has the following effects.
【００４６】この発明の回路遮断器によれば、熱可塑性
樹脂材料で形成されたカバーの開口部近傍に、回路遮断
器が短絡遮断動作時にバリヤから排出されたガスが開口
部方向へ流出するのを制限し排気孔の方向へ導く邪魔板
をカバーと一体に設けたので、バリヤのガス排気孔を通
り噴出したガスは、その大部分は邪魔板により排気孔の
方向に誘導され、開口部の方向へ殆ど噴出しなくなるの
で、カバーのみでもパネル面への地絡防止が可能とな
る。また、端子カバーが必要な場合でも、開口部から噴
出するガスの圧力によって端子カバーが飛散し難くな
る。According to the circuit breaker of the present invention, the gas discharged from the barrier flows out toward the opening in the vicinity of the opening of the cover formed of the thermoplastic resin material when the circuit breaker performs the short circuit breaking operation. Since the baffle plate that limits the air flow and guides it toward the exhaust hole is provided integrally with the cover, most of the gas ejected through the gas exhaust hole of the barrier is guided in the direction of the exhaust hole by the baffle plate, Since almost no jetting occurs in any direction, it is possible to prevent a ground fault to the panel surface only with the cover. Further, even when the terminal cover is required, the terminal cover does not easily scatter due to the pressure of the gas ejected from the opening.
【００４７】また、この発明の回路遮断器によれば、邪
魔板はバリヤに対向して配設され、短絡遮断動作時には
ガスの流れにより開口部近傍まで弾性変形し、ガスが開
口部方向へ流出するのを制限するようにしたので、バリ
ヤのガス排気孔を通り噴出したガスは、その大部分は邪
魔板により排気孔の方向に誘導され、開口部の方向へ殆
ど噴出しなくなるので、カバーのみでもパネル面への地
絡防止が可能となる。また、端子カバーが必要な場合で
も、開口部から噴出するガスの圧力によって端子カバー
が飛散し難くなる。Further, according to the circuit breaker of the present invention, the baffle plate is arranged so as to face the barrier, and during the short-circuit breaking operation, the flow of gas elastically deforms the vicinity of the opening so that the gas flows out toward the opening. Since most of the gas ejected through the gas exhaust holes of the barrier is guided in the direction of the exhaust holes by the baffle and almost no gas is ejected in the direction of the openings, only the cover is covered. However, it is possible to prevent ground faults on the panel surface. Further, even when the terminal cover is required, the terminal cover does not easily scatter due to the pressure of the gas ejected from the opening.
【００４８】また、この発明の回路遮断器によれば、邪
魔板が開口部まで弾性変形する途中で抑止されるストッ
パを設けたので、ガスの流出による邪魔板の異常な変形
が防止できるとともに、端子カバーが飛散し難くなる。Further, according to the circuit breaker of the present invention, since the stopper for preventing the baffle plate from being elastically deformed to the opening is provided, abnormal deformation of the baffle plate due to outflow of gas can be prevented, and The terminal cover is less likely to scatter.
【００４９】また、この発明の回路遮断器によれば、邪
魔板はガスの流れにより開口部近傍まで弾性変形する途
中でガス入口側端面と係合し開口部を閉塞する長さとし
たので、ガス入口側端面に当接してそれ以上開口部の方
向に撓まず、ガスの流れを効率よく排気孔へ誘導し、開
口部へのガスの噴出を阻止し、端子カバーの飛散を防止
する。なお、端子カバーを取付けなくてカバーのみでパ
ネル面への地絡を防止できる。Further, according to the circuit breaker of the present invention, the baffle plate has a length which engages with the end face on the gas inlet side and closes the opening portion while being elastically deformed to the vicinity of the opening portion by the flow of gas. It abuts the end face on the inlet side and does not bend further in the direction of the opening, efficiently guides the gas flow to the exhaust hole, prevents the gas from being ejected to the opening, and prevents the terminal cover from scattering. It should be noted that it is possible to prevent a ground fault to the panel surface only with the cover without attaching the terminal cover.
【００５０】また、この発明の回路遮断器によれば、開
口部のガス入口側端面に弾性を有して当接する邪魔板を
設けたので、開口部へのガスの漏れが少なくなりガスの
流れを効率よく排気孔へ誘導し、開口部へのガスの噴出
を阻止し、端子カバーの飛散を防止する。なお、端子カ
バーを取付けなくてカバーのみでパネル面への地絡を防
止できる。Further, according to the circuit breaker of the present invention, since the baffle plate having elasticity is in contact with the end face of the opening on the gas inlet side, the leak of gas to the opening is reduced and the gas flow. To efficiently guide the gas to the exhaust hole, prevent the gas from spouting to the opening, and prevent the terminal cover from scattering. It should be noted that it is possible to prevent a ground fault to the panel surface only with the cover without attaching the terminal cover.
【００５１】また、この発明の回路遮断器によれば、邪
魔板に弾性を有する一部薄肉部を設けたので、邪魔板の
組込み作業が容易になるとともに、回路遮断器の短絡遮
断動作時に発生するガスの圧力により、邪魔板は薄肉部
を中心に開口部の方向に速やかに湾曲する。この弾性変
形時に、邪魔板が排気孔の端面に押し付けられること
で、ガスの流れは排気孔の方向に誘導され、開口部への
ガスの漏れが少なくなりガスの流れを効率よく排気孔へ
誘導し、開口部へのガスの噴出を阻止し、端子カバーの
飛散を防止する。なお、端子カバーを取付けなくてもカ
バーのみでパネル面への地絡を防止できる。Further, according to the circuit breaker of the present invention, since the baffle plate is provided with a partially thin portion having elasticity, the work of assembling the baffle plate is facilitated, and the circuit breaker is generated during the short circuit breaking operation. The baffle plate is quickly curved in the direction of the opening centering on the thin portion due to the pressure of the generated gas. At the time of this elastic deformation, the baffle plate is pressed against the end surface of the exhaust hole, so that the gas flow is guided in the direction of the exhaust hole and the gas leakage to the opening is reduced, so that the gas flow is efficiently guided to the exhaust hole. However, the ejection of gas to the opening is prevented, and the terminal cover is prevented from scattering. Even if the terminal cover is not attached, it is possible to prevent a ground fault to the panel surface only with the cover.
【００５２】さらにまた、この発明の回路遮断器によれ
ば、熱硬化性樹脂材料で形成され、このカバーの開口部
近傍に形成された凹部に係合し回路遮断器が短絡遮断動
作時にバリヤから排出されたガスの流れを制限し排気孔
の方向へ導く熱可塑性樹脂材料で形成され邪魔板を設け
たので、熱硬化性樹脂材料で形成されたカバーを備えた
回路遮断器でも、開口部へのガスの漏れが少なくなりガ
スの流れを効率よく排気孔へ誘導し、開口部へのガスの
噴出を阻止し、端子カバーの飛散を防止する。なお、端
子カバーを取付けなくてもカバーのみでパネル面への地
絡を防止できる。Furthermore, according to the circuit breaker of the present invention, the circuit breaker is formed of a thermosetting resin material and engages with the recess formed in the vicinity of the opening of the cover so that the circuit breaker is protected from the barrier during the short-circuit breaking operation. Since a baffle plate made of a thermoplastic resin material that limits the flow of the discharged gas and guides it toward the exhaust hole is provided, even a circuit breaker equipped with a cover made of a thermosetting resin material can be opened to the opening. The leakage of gas is reduced, the flow of gas is efficiently guided to the exhaust hole, the ejection of gas to the opening is blocked, and the terminal cover is prevented from scattering. Even if the terminal cover is not attached, it is possible to prevent a ground fault to the panel surface only with the cover.
【図１】 この発明の実施の形態１である回路遮断器の
端子カバーを取外した状態を示す斜視図である。FIG. 1 is a perspective view showing a state in which a terminal cover of a circuit breaker according to a first embodiment of the present invention is removed.
【図２】 図１の線IIーIIに沿う要部拡大断面図であ
る。FIG. 2 is an enlarged sectional view of a main part taken along the line II-II in FIG.
【図３】 図２の回路遮断器の要部拡大平面図である。FIG. 3 is an enlarged plan view of a main part of the circuit breaker of FIG.
【図４】 この発明の実施の形態１を示す回路遮断器の
端子ネジを締付ける方法を示す要部拡大断面図である。FIG. 4 is an enlarged sectional view of an essential part showing a method of tightening the terminal screw of the circuit breaker showing the first embodiment of the present invention.
【図５】 この発明の実施の形態２を示す回路遮断器の
地絡防止構造の要部拡大断面図である。FIG. 5 is an enlarged cross-sectional view of a main part of a ground fault prevention structure for a circuit breaker showing a second embodiment of the present invention.
【図６】 図５の回路遮断器の要部拡大側面図である。6 is an enlarged side view of a main part of the circuit breaker of FIG.
【図７】 図５の回路遮断器が短絡遮断動作した状態を
示す要部拡大断面図である。FIG. 7 is an enlarged cross-sectional view of an essential part showing a state in which the circuit breaker of FIG. 5 performs a short circuit breaking operation.
【図８】 この発明の実施の形態３を示す回路遮断器の
地絡防止構造の要部拡大断面図である。FIG. 8 is an enlarged cross-sectional view of a main part of a ground fault prevention structure for a circuit breaker showing a third embodiment of the present invention.
【図９】 この発明の実施の形態４を示す回路遮断器の
地絡防止構造の要部拡大断面図である。FIG. 9 is an enlarged cross-sectional view of a main part of a ground fault prevention structure for a circuit breaker showing a fourth embodiment of the present invention.
【図１０】 この発明の実施の形態５を示す回路遮断器
の地絡防止構造の要部拡大断面図である。FIG. 10 is an enlarged cross-sectional view of a main part of a ground fault prevention structure for a circuit breaker showing a fifth embodiment of the present invention.
【図１１】 図１０の回路遮断器の要部拡大断面図であ
る。11 is an enlarged cross-sectional view of a main part of the circuit breaker of FIG.
【図１２】 図１０の回路遮断器が短絡遮断動作した状
態を示す要部拡大断面図である。FIG. 12 is an enlarged cross-sectional view of essential parts showing a state in which the circuit breaker of FIG. 10 performs a short-circuit breaking operation.
【図１３】 この発明の実施の形態６を示す回路遮断器
の斜視図である。FIG. 13 is a perspective view of a circuit breaker showing a sixth embodiment of the present invention.
【図１４】 図１３の線XIVーXIVに沿う要部拡大断面図
である。14 is an enlarged cross-sectional view of the main part taken along the line XIV-XIV in FIG.
【図１５】 この発明の実施の形態６を示す回路遮断器
の邪魔板を開口部の内側へ挿入する方法を示す説明図で
ある。FIG. 15 is an explanatory view showing a method of inserting the baffle plate of the circuit breaker showing the sixth embodiment of the present invention into the inside of the opening.
【図１６】 この発明の実施の形態６を示す回路遮断器
の端子ネジを締付ける方法を示す要部拡大断面図であ
る。FIG. 16 is an enlarged sectional view of essential parts showing a method for tightening a terminal screw of a circuit breaker showing Embodiment 6 of the present invention.
【図１７】 図１６の回路遮断器の要部拡大平面図であ
る。FIG. 17 is an enlarged plan view of a main part of the circuit breaker of FIG.
【図１８】 図１６の回路遮断器が短絡遮断動作した状
態を示す要部拡大断面図である。FIG. 18 is an enlarged cross-sectional view of essential parts showing a state in which the circuit breaker of FIG. 16 performs a short-circuit breaking operation.
【図１９】 この発明の実施の形態７を示す回路遮断器
の地絡防止構造の要部拡大断面図である。FIG. 19 is an enlarged cross-sectional view of a main part of a ground fault prevention structure for a circuit breaker showing a seventh embodiment of the present invention.
【図２０】 この発明の実施の形態８を示す回路遮断器
の地絡防止構造の要部拡大断面図である。FIG. 20 is an enlarged cross-sectional view of a main part of a ground fault prevention structure for a circuit breaker showing an eighth embodiment of the present invention.
【図２１】 この発明の実施の形態９を示す回路遮断器
の地絡防止構造を示す要部拡大断面図である。FIG. 21 is an enlarged sectional view of an essential part showing a ground fault prevention structure of a circuit breaker showing Embodiment 9 of the present invention.
【図２２】 この発明の実施の形態９の邪魔板を示す斜
視図である。FIG. 22 is a perspective view showing a baffle plate according to Embodiment 9 of the present invention.
【図２３】 従来の回路遮断器の地絡防止構造を示す斜
視図である。FIG. 23 is a perspective view showing a conventional ground fault prevention structure for a circuit breaker.
１１ ベース、１２ 固定接触子、１２ａ 固定接点、
１３ 可動接触子、１３ａ 可動接点、１４ 消弧装
置、１５，２５，３５，４５，５５ カバー、１５ａ，
２５ａ，３５ａ，４５ａ，５５ａ 開口部、１５ｂ，２
５ｂ，３５ｂ，４５ｂ，５５ｂ 排気孔、５５ｃ 凹
部、１５ｃ，２５ｃ，３５ｃ，４５ｃ，６０ 邪魔板、
１６ アーク発生室、１７ バリヤ、１８ 電源側端
子、１９ 端子カバー、２８ ストッパ11 bases, 12 fixed contacts, 12a fixed contacts,
13 movable contactor, 13a movable contact, 14 arc extinguishing device, 15, 25, 35, 45, 55 cover, 15a,
25a, 35a, 45a, 55a openings, 15b, 2
5b, 35b, 45b, 55b Exhaust hole, 55c Recessed portion, 15c, 25c, 35c, 45c, 60 Baffle plate,
16 arc generating chamber, 17 barrier, 18 power supply side terminal, 19 terminal cover, 28 stopper
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H01H 71/00 - 83/22 ─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. 7 , DB name) H01H 71/00-83/22
Claims (8)
の絶縁筐体の内部に収納された固定接触子と、この固定
接触子に対向して接離する可動接触子と、この可動接触
子が開離時に発生するアークが充満するアーク発生室
と、このアーク発生室に配設され上記アークを消弧する
消弧装置と、上記アーク発生室からのアークガスを上記
絶縁筐体の外部へ排出する排気孔と、この排気孔と交差
する方向に上記カバーに設けられた端子接続作業用の開
口部とを備えた回路遮断器において、 上記カバーは熱可塑性樹脂材料で形成され、上記開口部
近傍にこの回路遮断器が短絡遮断動作時に上記アーク発
生室から排出されたガスが上記開口部方向へ流出するの
を制限し上記排気孔の方向へ導く邪魔板を上記カバーと
一体に設けたことを特徴とする回路遮断器。1. An insulating housing composed of a base and a cover, a fixed contact housed inside the insulating housing, a movable contact facing the fixed contact, and a contacting distance between the fixed contact and the movable contact. Is an arc generating chamber filled with an arc generated at the time of breaking, an arc extinguishing device disposed in the arc generating chamber to extinguish the arc, and the arc gas from the arc generating chamber
In a circuit breaker having an exhaust hole for discharging to the outside of an insulating housing and an opening for terminal connection work provided in the cover in a direction intersecting with the exhaust hole, the cover is made of a thermoplastic resin material. is formed, the arc onset in the circuit breaker during short-circuit breaking operation in the vicinity of the opening
Circuit breaker Namashitsu either et discharged gas is characterized in that a baffle plate for guiding the direction of the restriction to the exhaust hole from flowing to the opening direction is provided integrally with the cover.
とを特徴とする請求項１記載の回路遮断器。2. The circuit breaker according to claim 1, wherein the baffle plate is provided near the entrance of the opening.
設けられたバリヤに対向して配設され、短絡遮断動作時
にはガスの流れにより開口部近傍まで弾性変形し、上記
ガスが上記開口部方向へ流出するのを制限することを特
徴とする請求項１記載の回路遮断器。3. The baffle is provided between the arc generating chamber and the exhaust hole.
2. The device is arranged so as to face a provided barrier, and elastically deforms to the vicinity of the opening due to the flow of gas during a short circuit breaking operation to limit the outflow of the gas toward the opening. Circuit breaker described.
抑止されるストッパを設けたことを特徴とする請求項２
または請求項３記載の回路遮断器。4. A stopper is provided to prevent the baffle plate from being elastically deformed to the opening.
Alternatively, the circuit breaker according to claim 3.
まで弾性変形する途中でガス入口側端面と係合し開口部
を閉塞する長さとしたことを特徴とする請求項３記載の
回路遮断器。5. The circuit breaker according to claim 3, wherein the baffle plate has a length that engages with the end face on the gas inlet side and closes the opening portion while being elastically deformed to the vicinity of the opening portion by the flow of gas. vessel.
当接する邪魔板を設けたことを特徴とする請求項１記載
の回路遮断器。6. The circuit breaker according to claim 1, wherein an elastic baffle plate is provided on an end surface of the opening portion on the gas inlet side so as to elastically contact the end surface.
けたことを特徴とする請求項５または請求項６記載の回
路遮断器。7. The circuit breaker according to claim 5, wherein the baffle is provided with a partially thin-walled portion having elasticity.
の絶縁筐体の内部に収納された固定接触子と、この固定
接触子に対向して接離する可動接触子と、この可動接触
子が開離時に発生するアークが充満するアーク発生室
と、このアーク発生室に配設され上記アークを消弧する
消弧装置と、上記アーク発生室からのアークガスを上記
絶縁筐体の外部へ排出する排気孔と、この排気孔と交差
する方向に上記カバーに設けられた端子接続作業用の開
口部とを備えた回路遮断器において、 上記カバーは熱硬化性樹脂材料で形成され、このカバー
の開口部近傍に形成された凹部と、回路遮断器が短絡遮
断動作時に上記アーク発生室から排出されたガスが上記
開口部方向へ流出するのを制限し上記排気孔の方向へ導
く熱可塑性樹脂材料からなり可撓性を有する邪魔板の一
端を上記凹部に係合させて設けたことを特徴とする回路
遮断器。8. An insulating casing composed of a base and a cover, a fixed contact housed inside the insulating casing, a movable contact facing the fixed contact and coming in and out of contact with the fixed contact, and the movable contact. Is an arc generating chamber filled with an arc generated at the time of breaking, an arc extinguishing device disposed in the arc generating chamber to extinguish the arc, and the arc gas from the arc generating chamber
In a circuit breaker having an exhaust hole for discharging to the outside of an insulating housing and an opening for connecting terminals provided in the cover in a direction intersecting with the exhaust hole, the cover is a thermosetting resin material. in is formed, an opening recess formed in the vicinity of the cover, the gas circuit breaker has been discharged the arcing chamber or found during short-circuit breaking operation is restricted from flowing to the opening direction the exhaust hole one baffle having flexibility made of thermoplastic material that leads in the direction of
A circuit breaker, characterized in that its end is engaged with said recess .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18350997A JP3399301B2 (en) | 1997-07-09 | 1997-07-09 | Circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18350997A JP3399301B2 (en) | 1997-07-09 | 1997-07-09 | Circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1131448A JPH1131448A (en) | 1999-02-02 |
| JP3399301B2 true JP3399301B2 (en) | 2003-04-21 |
Family
ID=16137091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18350997A Expired - Fee Related JP3399301B2 (en) | 1997-07-09 | 1997-07-09 | Circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3399301B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CZ298548B6 (en) * | 2006-02-01 | 2007-10-31 | Oez, S. R. O. | Electroinsulating cover of moving contact carrier of electric appliance, particularly of power circuit breaker |
| KR100728863B1 (en) | 2006-02-16 | 2007-06-19 | 엘에스산전 주식회사 | Arc extinguishing device of air circuit breaker |
| JP2010251035A (en) | 2009-04-14 | 2010-11-04 | Fuji Electric Fa Components & Systems Co Ltd | Circuit breaker |
| US9413142B2 (en) * | 2012-12-12 | 2016-08-09 | General Electric Company | Panelboard insulative plenum |
| CN105244242B (en) * | 2015-11-02 | 2017-09-15 | 上海电科电器科技有限公司 | breaker and its exhaust structure |
| FR3063174B1 (en) * | 2017-02-22 | 2019-04-19 | Schneider Electric Industries Sas | APPARATUS FOR CUTTING AN ELECTRICAL CURRENT WITH SEPARABLE ELECTRICAL CONTACTS AND CUTTING IN THE AIR |
| JP2018181503A (en) * | 2017-04-07 | 2018-11-15 | 三菱電機株式会社 | Circuit breaker |
-
1997
- 1997-07-09 JP JP18350997A patent/JP3399301B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1131448A (en) | 1999-02-02 |
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