JPH0339363B2 - - Google Patents
Info
- Publication number
- JPH0339363B2 JPH0339363B2 JP21227582A JP21227582A JPH0339363B2 JP H0339363 B2 JPH0339363 B2 JP H0339363B2 JP 21227582 A JP21227582 A JP 21227582A JP 21227582 A JP21227582 A JP 21227582A JP H0339363 B2 JPH0339363 B2 JP H0339363B2
- Authority
- JP
- Japan
- Prior art keywords
- arc
- extinguishing
- metal arc
- extinguishing plate
- fixed contact
- 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
Links
- 239000002184 metal Substances 0.000 claims description 38
- 229910052751 metal Inorganic materials 0.000 claims description 38
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000012212 insulator Substances 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 3
- 229910000976 Electrical steel Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Description
【発明の詳細な説明】
本発明は電流の開閉を行う開閉器、特にその消
弧機構に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a switch that switches on and off current, and particularly to an arc extinguishing mechanism thereof.
本発明の主たる適用開閉器として電磁接触器や
配線用しや断器を挙げることができる。 The main applicable switches of the present invention include electromagnetic contactors and wiring breakers.
まず第１図に従つて従来の電磁接触器の１例に
ついて説明する。第１図において、１はプラスチ
ツクで成形された取付台、２はこの取付台上にケ
イ素鋼板で積層された固定鉄心、３は固定鉄心２
に対向して配置されこれと同じくケイ素鋼板で積
層された可動鉄心、４は可動鉄心３と固定鉄心２
とを引外しばね（図示せず）に抗して吸着させる
駆動力を付与する操作コイル、５はプラスチツク
で形成され、角窓を有するクロスバーで、その下
端では可動鉄心３を保持している。６は上記クロ
スバー５の角窓に挿入されて押しばね７により押
圧保持されている可動接触子、６Ａは可動接触子
６に設けられた可動接点、８は可動接触子６と対
向して設けられ、電流を導通させる固定接触子、
８Ａはこの固定接触子８に設けられた固定接点、
８Ｃは同じくこの固定接触子８の端子部を示す。 First, an example of a conventional electromagnetic contactor will be explained with reference to FIG. In Fig. 1, 1 is a mounting base made of plastic, 2 is a fixed core laminated with silicon steel plates on this mount, and 3 is a fixed core 2.
A movable core 4 is placed facing the movable core and laminated with silicon steel plates, and 4 is a movable core 3 and a fixed core 2.
5 is a cross bar made of plastic and having a square window, the lower end of which holds the movable iron core 3. . Reference numeral 6 indicates a movable contact which is inserted into the corner window of the cross bar 5 and is pressed and held by a pressing spring 7, 6A is a movable contact provided on the movable contact 6, and 8 is provided facing the movable contact 6. a fixed contact that conducts current;
8A is a fixed contact provided on this fixed contact 8,
Similarly, 8C indicates a terminal portion of this fixed contactor 8.
然して、９は電磁接触器本体を外部回路と接続
するための端子ねじ、１０は固定接触子８を取付
けるベース、１１は電磁接触器上面を覆うカバー
で、その内部には固定接点８Ａと可動接点６Ａと
の間に生じるアーク１２を消弧するための磁性体
よりなる第１の金属消弧板１３と第２の金属消弧
板１４とが設けられている。第２図ａにはこれら
金属消弧板１３，１４と固定接触子８および固定
接点８Ａの取付態様を示している。この第１の金
属消弧板１３は固定接点８Ａを覆つて固定接触子
８上に跨架立設されたコ字状枠として構成され、
また第２の金属消弧板１４はその外側に単一板と
して同様跨架されている。 9 is a terminal screw for connecting the electromagnetic contactor main body with an external circuit, 10 is a base on which the fixed contact 8 is attached, and 11 is a cover that covers the top surface of the electromagnetic contactor. A first metal arc-extinguishing plate 13 and a second metal arc-extinguishing plate 14 made of a magnetic material are provided for extinguishing the arc 12 generated between the arc 12 and the arc 6A. FIG. 2a shows how these metal arc-extinguishing plates 13 and 14 are attached to the fixed contact 8 and the fixed contact 8A. The first metal arc-extinguishing plate 13 is configured as a U-shaped frame extending over the fixed contact 8 and covering the fixed contact 8A.
Further, the second metal arc-extinguishing plate 14 is similarly straddled as a single plate on the outside thereof.
上記構成を有するため、この従来の電磁接触器
において、操作コイル４を消磁すると、図示され
ていない引外しばねにより可動鉄心３が固定鉄心
２より開離し、クロスバー５も、第１図に示す状
態を占め、固定接点８Ａと可動接点６Ａとが開離
してこれら固定接点８Ａと可動接点６Ａとの間に
アーク１２が生じるが、このアーク１２は金属消
弧板１３，１４により電流零点において消弧さ
れ、電流がしや断されることになる。 Because of the above configuration, in this conventional electromagnetic contactor, when the operation coil 4 is demagnetized, the movable core 3 is separated from the fixed core 2 by a tripping spring (not shown), and the crossbar 5 is also separated from the fixed core 2 as shown in FIG. The fixed contact 8A and the movable contact 6A open and an arc 12 is generated between the fixed contact 8A and the movable contact 6A, but this arc 12 is extinguished by the metal arc extinguishing plates 13 and 14 at the current zero point. The current will then be cut off.
この従来の電磁接触器におけるアーク１２の消
弧プロセスを、消弧室断面を示す第２図ｂより更
に詳述すると、可動接点６Ａと固定接点８Ａとの
間に生じたアーク１２は磁性体の第１の金属消弧
板１３に吸引されてアーク１２Ａのように引き伸
ばされる。このとき、固定接触子８は第２図ｂの
ように断面コの字状の形態を備えており、この固
定接触子８を流れる電流が作る磁場によつてアー
ク１２は駆動され、このアーク１２が一層引き伸
ばされる。このようにアーク１２が引き伸ばされ
るとアーク電圧が高くなるので、固定接触子８と
第１の金属消弧板１３との間、第１の金属消弧板
１３と可動接点６Ａとの間でそれぞれ絶縁破壊が
起こり、アーク１２Ａは二つのアーク１２Ｂ，１
２Ｃに分断される。分断された一方のアーク１２
Ｃは第２の金属消弧板１４に吸引され、かつ固定
接触子８を流れる電流が作る磁場によつて駆動さ
れてアーク１２Ｄのように引き伸ばされる。この
アーク１２Ｄの伸延によりアーク電圧が高くなる
と、アーク１２Ｄは二つのアーク１２Ｅ，１２Ｆ
に更に分断され、アーク１２は最終的に三つのア
ーク１２Ｂ，１２Ｅ，１２Ｆに分断されて電流零
点で消弧され、電流がしや断されるに至る。 The arc 12 extinguishing process in this conventional electromagnetic contactor is explained in more detail with reference to FIG. 2b showing a cross section of the arc extinguishing chamber. It is attracted by the first metal arc-extinguishing plate 13 and elongated like an arc 12A. At this time, the fixed contact 8 has a U-shaped cross section as shown in FIG. 2b, and the arc 12 is driven by the magnetic field created by the current flowing through the fixed contact 8. is further stretched. When the arc 12 is stretched in this way, the arc voltage increases, so that the arc voltage increases between the fixed contact 8 and the first metal arc-extinguishing plate 13, and between the first metal arc-extinguishing plate 13 and the movable contact 6A. Dielectric breakdown occurs and the arc 12A splits into two arcs 12B, 1
Divided into 2C. One divided arc 12
C is attracted to the second metal arc-extinguishing plate 14, and is driven by the magnetic field created by the current flowing through the fixed contact 8, and is elongated like an arc 12D. When the arc voltage increases due to the extension of this arc 12D, the arc 12D becomes two arcs 12E and 12F.
The arc 12 is finally divided into three arcs 12B, 12E, and 12F, which are extinguished at the current zero point, and the current is finally cut off.
従来の開閉器においては、上記のように第１の
金属消弧板１３と第２の金属消弧板１４とを設け
てアークの分断消弧機能をより有効ならしめるよ
うにしているが、しや断時におけるアークドガス
が及ぼす開閉器上方に対する損傷についてはなん
らの保護もなされていないという欠点があつた。 In the conventional switch, the first metal arc-extinguishing plate 13 and the second metal arc-extinguishing plate 14 are provided as described above to make the arc dividing and extinguishing function more effective. There was a drawback in that there was no protection against damage to the upper part of the switch caused by arced gas when the switch was disconnected.
本発明は叙上の点に鑑み、開閉器の上方を覆う
絶縁物の劣化を防止しうるとともに、これにより
更に、しや断性能を向上させることを目的とする
ものであつて、その特徴とするところは、固定接
触子に接合された固定接点、この固定接点に対向
し可動接触子に接合して設けられた可動接点、コ
字状立壁より成り開放部を固定接触子先端に向け
て上記固定接点を囲んで立設された第１の金属消
弧板、およびこの第１の金属消弧板の上記各接点
より遠い側においてこれに並設された第２の金属
消弧板を備え、上記第１の金属消弧板には可動接
点の背面に対向する遮蔽舌部を設けたことに存す
る。 In view of the above points, the present invention aims to prevent the deterioration of the insulating material covering the upper part of the switch, and thereby further improve the shearing performance. It consists of a fixed contact joined to a fixed contact, a movable contact opposite the fixed contact and joined to a movable contact, and a U-shaped vertical wall with the open part facing the tip of the fixed contact. A first metal arc-extinguishing plate erected surrounding the fixed contact, and a second metal arc-extinguishing plate arranged in parallel with the first metal arc-extinguishing plate on a side farther from each of the contacts, The first metal arc-extinguishing plate is provided with a shielding tongue facing the back surface of the movable contact.
以下、第３図以降の実施例について本発明を説
明すると、実施例の開閉器は第３図から明きらか
なように主として消弧機構のみを従来のものと異
にしているので、第４図にその拡大図を示してい
る。同図に示すように第３図の消弧室の内部には
固定接点８Ａと可動接点６Ａとの間に生じるアー
ク１２を消弧するための磁性体よりなる第１の金
属消弧板１３と第２の金属消弧板１４とが設けら
れている。この第１の金属消弧板１３は固定接点
８Ａを覆つて固定接触子８上に跨架立設されたコ
字状枠として構成され、また第２の金属消弧板１
４はその外側に単一板として同様並設跨架されて
いる。なお、これら第１と第２の金属消弧板１
３，１４は固定接触子８に対して所定の間隔を介
在させて配設され、第８図に示す如く第２の金属
消弧板１４が固定接触子８に対して占める間隙ｄ
は、第１の金属消弧板１３における間隙Ｄより小
さく設定される。 Below, the present invention will be explained with reference to the embodiments shown in FIG. An enlarged view is shown. As shown in the same figure, inside the arc extinguishing chamber of FIG. A second metal arc-extinguishing plate 14 is provided. The first metal arc-extinguishing plate 13 is configured as a U-shaped frame extending over the fixed contact 8 and covering the fixed contact 8A, and the second metal arc-extinguishing plate 1
4 are similarly arranged side by side and straddled as a single plate on the outside. Note that these first and second metal arc-extinguishing plates 1
3 and 14 are disposed at a predetermined distance from the fixed contact 8, and as shown in FIG.
is set smaller than the gap D in the first metal arc-extinguishing plate 13.
然して、この第１の金属消弧板１３には可動接
点６Ａの背面に対向する遮蔽舌部１３Ｂを設けて
いる。また、この第１の金属消弧板１３は各接点
を囲む三面によりアークの吸引力を促進させると
ともに、周辺絶縁物の損傷からの遮蔽を意図して
構成されており、たとえば第９図のもののように
放熱効果等を考慮してそのコ字状形状を選定する
ことができる。 The first metal arc-extinguishing plate 13 is provided with a shielding tongue 13B that faces the back surface of the movable contact 6A. The first metal arc-extinguishing plate 13 is designed to promote the attraction of the arc by its three sides surrounding each contact and to shield the surrounding insulators from damage. The U-shaped shape can be selected in consideration of the heat dissipation effect, etc.
上記構成を有するため、この電磁接触器におい
て、操作コイル４を消磁すると、図示されていな
い引外しばねにより可動鉄心３が固定鉄心２より
開離し、クロスバー５も、第３図に示す状態を占
め、固定接点８Ａと可動接点６Ａとが開離して固
定接点８Ａと可動接点６Ａとの間にアーク１２が
生じるが、このアーク１２は金属消弧板１３，１
４により電流零点において消弧され、電流がしや
断されることになる。 Since it has the above configuration, in this electromagnetic contactor, when the operation coil 4 is demagnetized, the movable core 3 is separated from the fixed core 2 by a tripping spring (not shown), and the crossbar 5 also moves to the state shown in FIG. 3. Therefore, the fixed contact 8A and the movable contact 6A are opened, and an arc 12 is generated between the fixed contact 8A and the movable contact 6A.
4, the arc is extinguished at the current zero point, and the current is briefly cut off.
このアーク１２の消弧プロセスは前記従来のも
のと同じく、消弧室断面を示す第５図に示すよう
に、アーク１２は最終的に三つのアーク１２Ｂ，
１２Ｅ，１２Ｆに分断されて電流零点で消弧さ
れ、電流がしや断されるに至る。 The arc 12 extinguishing process is the same as the conventional one, and as shown in FIG.
It is divided into 12E and 12F, and the arc is extinguished at the current zero point, and the current is finally cut off.
このように、上述の開閉器によれば、第１の金
属消弧板１３が可動接点６Ａを囲んで立設された
コ字状枠として構成され、その囲壁三面に生じる
磁界によりアークの駆動吸引を促進させるととも
に、周囲の絶縁物への損傷を防止し、かつ第１と
第２の金属消弧板１３，１４を並設させることに
より前述の如くアークを分断させて消弧能力をよ
り強化させるようにしている。 According to the above-mentioned switch, the first metal arc-extinguishing plate 13 is configured as a U-shaped frame that stands upright surrounding the movable contact 6A, and the magnetic field generated on three sides of the surrounding wall drives and attracts the arc. In addition to promoting this, damage to the surrounding insulators is prevented, and by arranging the first and second metal arc extinguishing plates 13 and 14 in parallel, the arc is separated as described above, further strengthening the arc extinguishing ability. I try to let them do it.
特に、第１の金属消弧板１３には可動接点６Ａ
の背面に対向させて遮蔽舌部１３Ｂを設けている
ため、上方すなわち可動接点６Ａの背面部にある
絶縁体壁面のアークドガスによる熱劣化を防止で
き、前述のアーク分断効果を更に有効なものとす
ることが可能である。 In particular, the first metal arc-extinguishing plate 13 has a movable contact 6A.
Since the shielding tongue portion 13B is provided opposite to the back surface of the movable contact 6A, it is possible to prevent thermal deterioration of the insulator wall surface on the upper side, that is, the back surface of the movable contact 6A, due to the arced gas, making the above-mentioned arc breaking effect even more effective. Is possible.
なお、第６図および第７図に示すように、第２
の金属消弧板１４の下縁をアーク駆動方向に折曲
させてアークリード部１４Ｂを設けるようにすれ
ば、第７図に示すようにアーク１２Ｆの一端がも
たらす第２の金属消弧板１４の電界集中を起こり
難しく、かつ熱伝導性の良好な平面部であるアー
クリード部１４Ｂで消弧が行われる結果、焼損を
生ずる惧れのない優れたしや断性能が得られる。 In addition, as shown in FIGS. 6 and 7, the second
If the lower edge of the metal arc extinguishing plate 14 is bent in the arc driving direction to provide an arc lead portion 14B, as shown in FIG. As a result of extinguishing the arc at the arc lead portion 14B, which is a planar portion where electric field concentration is difficult to occur and has good thermal conductivity, excellent shingle cutting performance without the risk of burnout is obtained.
なお、上記実施例のものは、固定接触子８の形
状がコの字状に形成されているが、コの字状でな
く直線状のものでも同様な効果が得られるのは言
うまでもない。 In the above embodiment, the fixed contact 8 is formed in a U-shape, but it goes without saying that the same effect can be obtained even if it is straight rather than U-shaped.
また、叙上の説明においては、接点をマグネツ
トにより開閉する開閉器、すなわち電磁接触器に
本発明を適用した場合の例についてのみ述べてい
るが、例えば配線用しや断器のような他の開閉器
にも適用できるのは明白である。 In addition, in the above description, only an example in which the present invention is applied to a switch that opens and closes the contact using a magnet, that is, an electromagnetic contactor, is described, but other applications such as a wiring switch or a disconnector are described. It is obvious that it can also be applied to switches.
以上述べたように本発明においては、コ字状の
第１の金属消弧板とこれに並設した第２の金属消
弧板とを設けこれらを可動接点に対向させて設定
するとともに、第１の金属消弧板に遮蔽舌部を設
けることにより、開閉器上方の絶縁物の劣化を有
効に防止できるとともに、これにより更にしや断
性能を著しく向上させることのできる効果があ
る。 As described above, in the present invention, a U-shaped first metal arc-extinguishing plate and a second metal arc-extinguishing plate installed in parallel thereto are provided, and these are set to face the movable contact. By providing the shielding tongue on the first metal arc-extinguishing plate, it is possible to effectively prevent deterioration of the insulator above the switch, and this also has the effect of significantly improving the shearing performance.
第１図は従来の開閉器の部分断面図、第２図
ａ，ｂはその消弧室の要部構成およびその消弧動
作をそれぞれ示す説明図、第３図は本発明実施例
に係る開閉器の同様な部分断面図、第４図は第３
図のものの消弧室を示す要部拡大図、第５図は第
４図のものの消弧動作説明図、第６図は本発明の
他の実施例に係る第２の金属消弧板を示す斜視
図、第７図は第６図のものの消弧動作を示す説明
図、第８図は第３図の消弧室の全体説明図、第９
図はその一部斜視図である。
６……可動接触子、６Ａ……可動接点、８……
固定接触子、８Ａ……固定接点、１２，１２Ａ〜
１２Ｆ……アーク、１３……第１の金属消弧板、
１３Ｂ……遮蔽舌部、１４……第２の金属消弧
板、なお、図中同一符号は同一または相当部分を
示す。
Fig. 1 is a partial sectional view of a conventional switch, Figs. 2a and b are explanatory diagrams showing the configuration of main parts of the arc extinguishing chamber and its arc extinguishing operation, and Fig. 3 is an opening/closing switch according to an embodiment of the present invention. A similar partial cross-sectional view of the vessel, FIG.
FIG. 5 is an enlarged view of the main parts showing the arc extinguishing chamber of the one shown in FIG. 4, FIG. 6 is a diagram explaining the arc extinguishing operation of the one shown in FIG. A perspective view, FIG. 7 is an explanatory diagram showing the arc extinguishing operation of the one in FIG. 6, FIG. 8 is an overall explanatory diagram of the arc extinguishing chamber in FIG. 3, and FIG.
The figure is a partial perspective view. 6...Movable contact, 6A...Movable contact, 8...
Fixed contact, 8A...Fixed contact, 12, 12A~
12F... arc, 13... first metal arc extinguishing plate,
13B... Shielding tongue portion, 14... Second metal arc-extinguishing plate. Note that the same reference numerals in the drawings indicate the same or corresponding parts.
Claims (1)
接点に対向し可動接触子に接合して設けられた可
動接点、コ字状立壁より成り開放部を固定接触子
先端に向けて上記固定接点を囲んで立設された第
１の金属消弧板、およびこの第１の金属消弧板の
上記各接点より遠い側においてこれに並設された
第２の金属消弧板を備え、上記第１の金属消弧板
には可動接点の背面に対向する遮蔽舌部を設けた
ことを特徴とする開閉器。1. A fixed contact joined to a fixed contact, a movable contact facing this fixed contact and joined to a movable contact, and consisting of a U-shaped vertical wall, with the open part facing the tip of the fixed contact. a first metal arc-extinguishing plate that stands upright surrounding the first metal arc-extinguishing plate; and a second metal arc-extinguishing plate that is parallel to the first metal arc-extinguishing plate on a side farther from each contact point of the first metal arc-extinguishing plate; A switch characterized in that the metal arc-extinguishing plate is provided with a shielding tongue facing the back surface of the movable contact.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21227582A JPS59103219A (en) | 1982-12-03 | 1982-12-03 | Switch |
| PCT/JP1983/000397 WO1984002033A1 (en) | 1982-11-10 | 1983-11-04 | Switch |
| US06/629,833 US4642429A (en) | 1982-11-10 | 1983-11-04 | Switch |
| EP83903418A EP0124621B1 (en) | 1982-11-10 | 1983-11-04 | Switch |
| DE8383903418T DE3382440D1 (en) | 1982-11-10 | 1983-11-04 | COUNTER. |
| KR2019830009413U KR880001536Y1 (en) | 1982-11-10 | 1983-11-05 | A switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21227582A JPS59103219A (en) | 1982-12-03 | 1982-12-03 | Switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59103219A JPS59103219A (en) | 1984-06-14 |
| JPH0339363B2 true JPH0339363B2 (en) | 1991-06-13 |
Family
ID=16619896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21227582A Granted JPS59103219A (en) | 1982-11-10 | 1982-12-03 | Switch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59103219A (en) |
-
1982
- 1982-12-03 JP JP21227582A patent/JPS59103219A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59103219A (en) | 1984-06-14 |
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