JP6309717B2 - Magnetic contactor - Google Patents

Magnetic contactor Download PDF

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JP6309717B2
JP6309717B2 JP2013142056A JP2013142056A JP6309717B2 JP 6309717 B2 JP6309717 B2 JP 6309717B2 JP 2013142056 A JP2013142056 A JP 2013142056A JP 2013142056 A JP2013142056 A JP 2013142056A JP 6309717 B2 JP6309717 B2 JP 6309717B2
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contact
arc
movable
fixed
shape
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JP2015015195A (en
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鹿志村　修
修 鹿志村
磯崎　優
優 磯崎
幸悦 高谷
幸悦 高谷
雄二 柴
雄二 柴
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Fuji Electric Co Ltd
Fuji Electric FA Components and Systems Co Ltd
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Fuji Electric Co Ltd
Fuji Electric FA Components and Systems Co Ltd
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Description

本発明は、固定接触子に対して可動接触子が接離可能に配置された接点装置と、この接点装置の可動接触子を可動する電磁石ユニットとを備えた電磁接触器に関し、特に可動接触子が固定接触子から離間する開極時に発生するアークを容易に消弧するようにしたものである。   The present invention relates to an electromagnetic contactor including a contact device in which a movable contact is arranged to be movable toward and away from a fixed contact, and an electromagnet unit that moves the movable contact of the contact device. Is designed to easily extinguish an arc generated at the time of opening apart from the fixed contact.

電流路の開閉を行う電磁接触器では、所定距離を保って配置された一対の固定接触子とこれら一対の固定接触子に対して接離可能に配置された可動接触子とが接点収納ケース内に配置され、この接点収納ケースの内側に一対の固定接触子及び可動接触子を囲むように絶縁筒体を配置し、この絶縁筒体に一対の固定接触子及び可動接触子間に発生するアークを消弧するアーク消弧用永久磁石を磁石収納部で位置決め保持するとともに、この磁石収納部の可動接触子の延長方向外側にアーク消弧空間を形成するようにしている（例えば、特許文献１参照）。   In an electromagnetic contactor that opens and closes a current path, a pair of fixed contacts arranged at a predetermined distance and a movable contact arranged so as to be able to come in contact with and separate from the pair of fixed contacts are in a contact storage case. An insulating cylinder is disposed inside the contact housing case so as to surround the pair of fixed and movable contacts, and an arc generated between the pair of fixed and movable contacts on the insulating cylinder. The arc extinguishing permanent magnet for extinguishing the arc is positioned and held by the magnet housing portion, and an arc arc extinguishing space is formed outside the movable contact of the magnet housing portion in the extending direction (for example, Patent Document 1). reference).

特開２０１２−２４３５９２号公報JP 2012-243592 A

しかしながら、上記特許文献１に記載の従来例にあっては、アーク消弧空間が例えば合成樹脂製の樹脂成型品で構成される絶縁筒体の内周面で形成されている。このため、樹脂成型品の場合、内壁面が滑らかに仕上げられているので、この内壁面に沿う気流は層流となり熱交換量も小さく熱交換量が飽和状態となっている。また、樹脂成型品の熱伝達率は０．２Ｗ／ｍＫと小さいため、アークの冷却効果が小さく、アーク電界を高めることができないため、所定のアーク電圧を得るためのアーク長が長くなり、小型化が困難となるという未解決の課題がある。
そこで、本発明は、上記従来例の未解決の課題に着目してなされたものであり、熱交換量が飽和することなく、アークの冷却を十分に行って、アークの消弧を容易に行うことができる電磁接触器を提供することを目的としている。 However, in the conventional example described in Patent Document 1, the arc extinguishing space is formed on the inner peripheral surface of an insulating cylinder formed of a resin molded product made of synthetic resin, for example. For this reason, in the case of a resin molded product, since the inner wall surface is finished smoothly, the air flow along the inner wall surface becomes a laminar flow, and the heat exchange amount is small and the heat exchange amount is saturated. In addition, since the heat transfer coefficient of the resin molded product is as small as 0.2 W / mK, the arc cooling effect is small, and the arc electric field cannot be increased, so that the arc length for obtaining a predetermined arc voltage becomes long and small. There is an unresolved problem that it will be difficult to make it easier.
Therefore, the present invention has been made by paying attention to the unsolved problems of the above-described conventional example, and the arc is sufficiently cooled and the arc is easily extinguished without saturating the heat exchange amount. It is an object to provide an electromagnetic contactor that can.

上記目的を達成するために、本発明に係る電磁接触器の第１の態様は、接点収納ケースの絶縁性を有する合成樹脂製の絶縁筒体内に所定間隔を保って配置された一対の固定接触子に対して可動接触子を接離可能に配置するとともに、絶縁筒体における一対の固定接触子の接点と可動接触子の接点との接触位置の当該可動接触子の延長方向と交差する位置にアーク消弧室を形成し、アーク消弧室を形成する前記絶縁筒体のアーク接触面に熱伝達率を高める凹凸部を点在させている。 In order to achieve the above object, a first aspect of an electromagnetic contactor according to the present invention is a pair of fixed contacts arranged at a predetermined interval in an insulating cylinder made of synthetic resin having insulating properties of a contact housing case. The movable contact is arranged so as to be able to contact and separate from the child, and the contact position between the contact of the pair of fixed contacts and the contact of the movable contact in the insulating cylinder intersects with the extending direction of the movable contact. forming an arc extinguishing chamber and the arc contact surface of the insulating cylinder to form a arc extinguishing chamber interspersed the uneven portion to increase the heat transfer rate.

また、本発明に係る電磁接触器の第２の態様は、前記凹凸部がアーク接触面に沿う気流を乱流状態とするように配列されている。
また、本発明に係る電磁接触器の第３の態様は、前記凹凸部が、前記アーク消弧室の一対の固定接触子の接点及び可動接触子の接点に対向する面に千鳥状に配列させている。
また、本発明に係る電磁接触器の第４の態様は、前記凹凸部が、円柱形状、角柱形状、円錐形状、角錐形状、半球形状の少なくとも１つの形状の凹部及び凸部の少なくとも一方で構成されている。 Moreover, the 2nd aspect of the electromagnetic contactor which concerns on this invention is arranged so that the said uneven | corrugated | grooved part may make the airflow which follows an arc contact surface into a turbulent flow state.
According to a third aspect of the electromagnetic contactor of the present invention, the uneven portion is arranged in a zigzag pattern on the surface of the arc extinguishing chamber facing the contact of the pair of fixed contact and the contact of the movable contact. ing.
In addition, a fourth aspect of the electromagnetic contactor according to the present invention is such that the uneven portion has at least one of a concave portion and a convex portion having at least one of a cylindrical shape, a prismatic shape, a conical shape, a pyramid shape, and a hemispherical shape. Has been.

本発明によれば、アーク消弧室のアーク接触面に熱伝達率を高める凹凸部を点在させたので、アーク接触面の熱伝達率を高めることができ、熱交換量が飽和することなく、アークの冷却を十分に行うことが可能となる。その結果、アーク電界が高まり、所定のアーク電圧を得るためのアーク長を短くすることができるので、アークを引き伸ばすための消弧スペースを小さくすることができ、小型化・軽量化が可能となる。
また、アーク長が短くなると、遮断完了までの時間（アーク持続時間）が短くなり、固定接触子及び可動接触子の接点の消耗を抑制することが可能となり、コンタクタとしての長寿命化を図ることができる。 According to the present invention, since the uneven portions that increase the heat transfer coefficient are scattered on the arc contact surface of the arc extinguishing chamber, the heat transfer coefficient of the arc contact surface can be increased and the amount of heat exchange is not saturated. The arc can be sufficiently cooled. As a result, the arc electric field is increased, and the arc length for obtaining a predetermined arc voltage can be shortened. Therefore, the arc extinguishing space for extending the arc can be reduced, and the size and weight can be reduced. .
Also, when the arc length is shortened, the time until completion of interruption (arc duration) is shortened, and it becomes possible to suppress the consumption of the contacts of the stationary contact and the movable contact, thereby extending the life of the contactor. Can do.

本発明に係る電磁接触器の一実施形態を示す断面図である。It is sectional drawing which shows one Embodiment of the electromagnetic contactor which concerns on this invention. 図１のＡ−Ａ線上の接点装置の一部を拡大して示す断面図である。It is sectional drawing which expands and shows a part of contact device on the AA line of FIG. 図１のＢ−Ｂ線上の断面図である。It is sectional drawing on the BB line of FIG. アークの発生状態を説明する説明図である。It is explanatory drawing explaining the generation | occurrence | production state of an arc. 本発明に適用し得る接点装置の変形例を示す図であって、（ａ）は断面図、（ｂ）は斜視図である。It is a figure which shows the modification of the contact device which can be applied to this invention, Comprising: (a) is sectional drawing, (b) is a perspective view. 本発明に適用し得る接点装置の他の変形例を示す図であって、（ａ）は断面図、（ｂ）は斜視図である。It is a figure which shows the other modification of the contact device which can be applied to this invention, Comprising: (a) is sectional drawing, (b) is a perspective view.

以下、本発明の実施の形態を図面に基づいて説明する。
図１は本発明に係る電磁開閉器の一例を示す断面図、図２は図１のＡ−Ａ線上における接点装置の断面図である。図３は図１のＢ−Ｂ線上の断面図である。
これら図１〜図３において、１０は電磁接触器であり、この電磁接触器１０は接点機構を配置した接点装置１００と、この接点装置１００を駆動する電磁石ユニット２００とで構成されている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view showing an example of an electromagnetic switch according to the present invention, and FIG. 2 is a cross-sectional view of a contact device on line AA in FIG. 3 is a cross-sectional view taken along the line BB in FIG.
1 to 3, reference numeral 10 denotes an electromagnetic contactor. The electromagnetic contactor 10 includes a contact device 100 in which a contact mechanism is disposed, and an electromagnet unit 200 that drives the contact device 100.

接点装置１００は、図１〜図３から明らかなように、接点機構１０１を収納する接点収納ケース１０２を有する。この接点収納ケース１０２は、金属製の下端部に外方と突出するフランジ部１０３を有する金属角筒体１０４と、この金属角筒体１０４の上端を閉塞する平板状のセラミック絶縁基板で構成される固定接点支持絶縁基板１０５と、金属角筒体１０４の内周側に配置された絶縁筒体１４０とを備えている。
金属角筒体１０４は、そのフランジ部１０３が後述する電磁石ユニット２００の上部磁気ヨーク２１０にシール接合されて固定されている。
また、固定接点支持絶縁基板１０５には、中央部に後述する一対の固定接触子１１１及び１１２を挿通する貫通孔１０６及び１０７が所定間隔を保って形成されている。 As is apparent from FIGS. 1 to 3, the contact device 100 includes a contact storage case 102 that stores the contact mechanism 101. The contact housing case 102 is composed of a metal rectangular tube 104 having a flange 103 protruding outward at a metal lower end, and a flat ceramic insulating substrate that closes the upper end of the metal rectangular tube 104. A fixed contact supporting insulating substrate 105 and an insulating cylinder 140 disposed on the inner peripheral side of the metal rectangular cylinder 104.
The metal rectangular tube 104 is fixed by being sealed and bonded to an upper magnetic yoke 210 of an electromagnet unit 200 whose flange 103 is described later.
Further, through holes 106 and 107 through which a pair of fixed contacts 111 and 112 (described later) are inserted are formed in the fixed contact supporting insulating substrate 105 at a central portion with a predetermined interval.

接点機構１０１は、図１に示すように、接点収納ケース１０２の固定接点支持絶縁基板１０５の貫通孔１０６及び１０７に挿通されて固定された一対の固定接触子１１１及び１１２を備えている。これら固定接触子１１１及び１１２のそれぞれは、固定接点支持絶縁基板１０５の貫通孔１０６及び１０７に挿通される上端に外方に突出するフランジ部１１３を有する支持導体部１１４と、この支持導体部１１４に連結されて固定接点支持絶縁基板１０５の下面側に配設され内方側を開放したＣ字状部１１５とを備えている。   As shown in FIG. 1, the contact mechanism 101 includes a pair of fixed contacts 111 and 112 that are inserted into and fixed to the through holes 106 and 107 of the fixed contact support insulating substrate 105 of the contact storage case 102. Each of the fixed contacts 111 and 112 includes a support conductor portion 114 having a flange portion 113 protruding outward at an upper end inserted through the through holes 106 and 107 of the fixed contact support insulating substrate 105, and the support conductor portion 114. And a C-shaped portion 115 disposed on the lower surface side of the fixed contact supporting insulating substrate 105 and having an inner side open.

Ｃ字状部１１５は、固定接点支持絶縁基板１０５の下面に沿って外側に延長する上板部１１６とこの上板部１１６の外側端部から下方に延長する中間板部１１７と、この中間板部１１７の下端側から上板部１１６と平行に内方側すなわち固定接触子１１１及び１１２の対面方向に延長する下板部１１８とで中間板部１１７及び下板部１１８で形成されるＬ字状に上板部１１６を加えたＣ字状に形成されている。   The C-shaped portion 115 includes an upper plate portion 116 that extends outward along the lower surface of the fixed contact supporting insulating substrate 105, an intermediate plate portion 117 that extends downward from the outer end portion of the upper plate portion 116, and the intermediate plate. An L-shape formed by the intermediate plate portion 117 and the lower plate portion 118 from the lower end side of the portion 117 to the inner side parallel to the upper plate portion 116, that is, the lower plate portion 118 extending in the facing direction of the fixed contacts 111 and 112. It is formed in a C shape with the upper plate portion 116 added to the shape.

ここで、支持導体部１１４とＣ字状部１１５とは、支持導体部１１４の下端面に突出形成されたピン１１４ａをＣ字状部１１５の上板部１１６に形成された貫通孔１２０内に挿通した状態で例えばロウ付け等によって固定されている。なお、支持導体部１１４及びＣ字状部１１５の固定は、ロウ付け等に限らず、ピン１１４ａを貫通孔１２０に嵌合させたり、ピン１１４ａに雄ねじを形成し、貫通孔１２０に雌ねじを形成して両者を螺合させたりしてもよい。   Here, the support conductor portion 114 and the C-shaped portion 115 include a pin 114 a that protrudes from the lower end surface of the support conductor portion 114 in the through hole 120 formed in the upper plate portion 116 of the C-shaped portion 115. In the inserted state, it is fixed by brazing, for example. The fixing of the support conductor 114 and the C-shaped portion 115 is not limited to brazing or the like, but the pin 114a is fitted into the through hole 120, the male screw is formed on the pin 114a, and the female screw is formed on the through hole 120. Then, they may be screwed together.

そして、固定接触子１１１及び１１２のＣ字状部１１５にそれぞれ、アークの発生を規制する合成樹脂材製の絶縁カバー１２１が装着されている。この絶縁カバー１２１は、Ｃ字状部１１５の上板部１１６及び中間板部１１７の内周面を被覆するものである。
このように、固定接触子１１１及び１１２のＣ字状部１１５に絶縁カバー１２１を装着することにより、このＣ字状部１１５の内周面では下板部１１８の上面側のみが露出されて接点部１１８ａとされている。 Then, an insulating cover 121 made of a synthetic resin material that restricts the generation of an arc is attached to each of the C-shaped portions 115 of the fixed contacts 111 and 112. The insulating cover 121 covers the inner peripheral surfaces of the upper plate portion 116 and the intermediate plate portion 117 of the C-shaped portion 115.
As described above, by attaching the insulating cover 121 to the C-shaped portion 115 of the fixed contacts 111 and 112, only the upper surface side of the lower plate portion 118 is exposed on the inner peripheral surface of the C-shaped portion 115, and the contact is made. Part 118a.

そして、固定接触子１１１及び１１２のＣ字状部１１５内に両端部を配置するように可動接触子１３０が配設されている。この可動接触子１３０は後述する電磁石ユニット２００の可動プランジャ２１５に固定された連結軸１３１に支持されている。この可動接触子１３０は、中央部の連結軸１３１の近傍が下方に突出する凹部１３２が形成され、この凹部１３２に連結軸１３１を挿通する貫通孔１３３が形成されている。   And the movable contact 130 is arrange | positioned so that both ends may be arrange | positioned in the C-shaped part 115 of the stationary contacts 111 and 112. FIG. The movable contact 130 is supported by a connecting shaft 131 fixed to a movable plunger 215 of an electromagnet unit 200 described later. The movable contact 130 is formed with a recess 132 that protrudes downward in the vicinity of the central connection shaft 131, and a through-hole 133 through which the connection shaft 131 is inserted is formed in the recess 132.

連結軸１３１は、上端に外方に突出するフランジ部１３１ａが形成されている。この連結軸１３１に下端側から接触スプリング１３４に挿通し、次いで可動接触子１３０の貫通孔１３３を挿通して、接触スプリング１３４の上端をフランジ部１３１ａに当接させこの接触スプリング１３４で所定の付勢力を得るように可動接触子１３０を例えばＣリング１３５によって位置決めする。   The connecting shaft 131 has a flange portion 131a that protrudes outward at the upper end. The connecting shaft 131 is inserted into the contact spring 134 from the lower end side, and then inserted into the through hole 133 of the movable contact 130 so that the upper end of the contact spring 134 is brought into contact with the flange portion 131a. The movable contact 130 is positioned by, for example, a C-ring 135 so as to obtain a force.

この可動接触子１３０は、釈放状態で、両端の接点部と固定接触子１１１及び１１２のＣ字状部１１５の下板部１１８の接点部１１８ａとが所定間隔を保って離間した状態となる。また、可動接触子１３０は、投入位置で、両端の接点部が固定接触子１１１及び１１２のＣ字状部１１５の下板部１１８の接点部１１８ａに、接触スプリング１３４による所定の接触圧で接触するように設定されている。   In the released state, the movable contact 130 is in a state in which the contact portions at both ends and the contact portion 118a of the lower plate portion 118 of the C-shaped portion 115 of the fixed contacts 111 and 112 are separated from each other with a predetermined interval. In the movable contact 130, the contact portions at both ends are in contact with the contact portion 118a of the lower plate portion 118 of the C-shaped portion 115 of the fixed contacts 111 and 112 with a predetermined contact pressure by the contact spring 134 at the closing position. It is set to be.

さらに、接点収納ケース１０２を構成する絶縁筒体１４０は、図１〜図３に示すように、例えば合成樹脂製の上端を開放した有底の角筒状に形成され、この絶縁筒体１４０の可動接触子１３０の側面に対向する位置に内方に突出する磁石収納ポケット１４１及び１４２が形成されている。この磁石収納ポケット１４１及び１４２には、アーク消弧用永久磁石１４３及び１４４が挿通されて固定されている。   Further, as shown in FIGS. 1 to 3, the insulating cylindrical body 140 constituting the contact housing case 102 is formed in a bottomed square cylindrical shape having an open upper end made of synthetic resin, for example. Magnet storage pockets 141 and 142 projecting inward are formed at positions facing the side surfaces of the movable contact 130. In the magnet storage pockets 141 and 142, arc extinguishing permanent magnets 143 and 144 are inserted and fixed.

このアーク消弧用永久磁石１４３及び１４４は、厚み方向に互いの対向面が同極例えばＮ極となるように着磁されている。そして、磁石収納ポケット１４１及び１４２の左右方向の外側にそれぞれアーク消弧室１４５及び１４６が形成されている。
これらアーク消弧室１４５及び１４６には、図２に拡大図示するように、アークが接触する内表面に例えば千鳥状に多数の円柱状突起１４７を配置した凹凸部１４８が形成されている。この凹凸部１４８はアーク消弧室１４５及び１４６の内表面を流れる気流を乱流状態とするとともに、表面積を増加させて熱伝達率を高めるように構成されている。 The arc extinguishing permanent magnets 143 and 144 are magnetized so that their opposing surfaces have the same polarity, for example, N pole, in the thickness direction. Arc extinguishing chambers 145 and 146 are formed outside the magnet storage pockets 141 and 142 in the left-right direction, respectively.
In these arc extinguishing chambers 145 and 146, as shown in an enlarged view in FIG. 2, an uneven portion 148 in which a large number of cylindrical protrusions 147 are arranged in a staggered manner on the inner surface with which the arc contacts is formed. The concavo-convex portion 148 is configured to make the airflow flowing through the inner surfaces of the arc extinguishing chambers 145 and 146 into a turbulent state and increase the surface area to increase the heat transfer coefficient.

電磁石ユニット２００は、図１に示すように、側面から見て扁平なＵ字形状の磁気ヨーク２０１を有し、この磁気ヨーク２０１の底板部２０２の中央部に円筒状補助ヨーク２０３が固定されている。この円筒状補助ヨーク２０３の外側にプランジャ駆動部としてのスプール２０４が配置されている。
このスプール２０４は、円筒状補助ヨーク２０３を挿通する中央円筒部２０５と、この中央円筒部２０５の下端部から半径方向外方に突出する下フランジ部２０６と、中央円筒部２０５の上端より僅かに下側から半径方向外方に突出する上フランジ部２０７とで構成されている。そして、中央円筒部２０５、下フランジ部２０６及び上フランジ部２０７で構成される収納空間に励磁コイル２０８が巻装されている。 As shown in FIG. 1, the electromagnet unit 200 includes a U-shaped magnetic yoke 201 that is flat when viewed from the side, and a cylindrical auxiliary yoke 203 is fixed to the center of the bottom plate portion 202 of the magnetic yoke 201. Yes. A spool 204 as a plunger driving unit is disposed outside the cylindrical auxiliary yoke 203.
The spool 204 includes a central cylindrical portion 205 that passes through the cylindrical auxiliary yoke 203, a lower flange portion 206 that protrudes radially outward from the lower end portion of the central cylindrical portion 205, and a little more than the upper end of the central cylindrical portion 205. The upper flange portion 207 protrudes radially outward from the lower side. An exciting coil 208 is wound around a storage space formed by the central cylindrical portion 205, the lower flange portion 206, and the upper flange portion 207.

そして、磁気ヨーク２０１の開放端となる上端間に上部磁気ヨーク２１０が固定されている。この上部磁気ヨーク２１０は、中央部にスプール２０４の中央円筒部２０５に対向する貫通孔２１０ａが形成されている。
そして、スプール２０４の中央円筒部２０５内に、底部と磁気ヨーク２０１の底板部２０２との間に復帰スプリング２１４を配設した可動プランジャ２１５が上下に摺動可能に配設されている。この可動プランジャ２１５には、上部磁気ヨーク２１０から上方に突出する上端部に半径方向外方に突出する周鍔部２１６が形成されている。 The upper magnetic yoke 210 is fixed between the upper ends of the magnetic yoke 201 serving as the open end. The upper magnetic yoke 210 is formed with a through hole 210 a facing the central cylindrical portion 205 of the spool 204 at the central portion.
In the central cylindrical portion 205 of the spool 204, a movable plunger 215 having a return spring 214 disposed between the bottom portion and the bottom plate portion 202 of the magnetic yoke 201 is slidably disposed. The movable plunger 215 is formed with a peripheral flange portion 216 protruding outward in the radial direction at an upper end portion protruding upward from the upper magnetic yoke 210.

また、上部磁気ヨーク２１０の上面に、環状に形成された環状永久磁石２２０が可動プランジャ２１５の周鍔部２１６を囲むように固定されている。この環状永久磁石２２０は外形が長方形に形成され中央部に周鍔部２１６を囲む貫通孔２２１を有する。この環状永久磁石２２０は上下方向すなわち厚み方向に上端側を例えばＮ極とし、下端側をＳ極とするように着磁されている。なお、環状永久磁石２２０の貫通孔２２１の形状は周鍔部２１６の形状に合わせた形状とし、外周面の形状は円形、方形等の任意の形状とすることができる。同様に、環状永久磁石２２０の外形も長方形状に限らず、円形、六角形等の任意の形状とすることができる。
そして、環状永久磁石２２０の上端面に、環状永久磁石２２０と同一外形の補助ヨーク２２５が固定されている。 Further, an annular permanent magnet 220 formed in an annular shape is fixed on the upper surface of the upper magnetic yoke 210 so as to surround the peripheral flange portion 216 of the movable plunger 215. The annular permanent magnet 220 has a rectangular outer shape and has a through hole 221 that surrounds the peripheral flange 216 at the center. The annular permanent magnet 220 is magnetized so that the upper end side is, for example, an N pole and the lower end side is an S pole in the vertical direction, ie, the thickness direction. The shape of the through-hole 221 of the annular permanent magnet 220 is a shape that matches the shape of the peripheral flange portion 216, and the shape of the outer peripheral surface can be any shape such as a circle or a rectangle. Similarly, the outer shape of the annular permanent magnet 220 is not limited to a rectangular shape, but may be any shape such as a circle or a hexagon.
An auxiliary yoke 225 having the same outer shape as that of the annular permanent magnet 220 is fixed to the upper end surface of the annular permanent magnet 220.

そして、可動プランジャ２１５が、図１に示すように、非磁性体製で有底筒状に形成されたキャップ２３０で覆われ、このキャップ２３０の開放端に半径方向外方に延長して形成されたフランジ部２３１が上部磁気ヨーク２１０の下面にシール接合されている。これによって、接点収納ケース１０２及びキャップ２３０が上部磁気ヨーク２１０の貫通孔２１０ａを介して連通される密封容器が形成されている。そして、接点収納ケース１０２及びキャップ２３０で形成される密封容器内に水素ガス、窒素ガス、水素及び窒素の混合ガス、空気、ＳＦ６等のガスが封入されている。 As shown in FIG. 1, the movable plunger 215 is covered with a cap 230 made of a nonmagnetic material and formed in a bottomed cylindrical shape, and is formed by extending radially outward at the open end of the cap 230. The flange portion 231 is sealed to the lower surface of the upper magnetic yoke 210. As a result, a sealed container is formed in which the contact housing case 102 and the cap 230 are communicated with each other via the through hole 210 a of the upper magnetic yoke 210. A gas such as hydrogen gas, nitrogen gas, a mixed gas of hydrogen and nitrogen, air, or SF 6 is sealed in a sealed container formed by the contact housing case 102 and the cap 230.

次に、上記実施形態の動作を説明する。
今、固定接触子１１１が例えば大電流を供給する電力供給源に接続され、固定接触子１１２が負荷に接続されているものとする。
この状態で、電磁石ユニット２００における励磁コイル２０８が非励磁状態にあって、電磁石ユニット２００で可動プランジャ２１５を下降させる励磁力を発生していない釈放状態にあるものとする。この釈放状態では、可動プランジャ２１５が復帰スプリング２１４によって、上部磁気ヨーク２１０から離れる上方向に付勢される。 Next, the operation of the above embodiment will be described.
Now, it is assumed that the fixed contact 111 is connected to a power supply source that supplies a large current, for example, and the fixed contact 112 is connected to a load.
In this state, it is assumed that the exciting coil 208 in the electromagnet unit 200 is in a non-excited state and the electromagnet unit 200 is in a released state in which no exciting force for lowering the movable plunger 215 is generated. In this released state, the movable plunger 215 is urged upward by the return spring 214 away from the upper magnetic yoke 210.

これと同時に、環状永久磁石２２０の磁力による吸引力が補助ヨーク２２５に作用されて、可動プランジャ２１５の周鍔部２１６が吸引される。このため、可動プランジャ２１５の周鍔部２１６の上面が補助ヨーク２２５の段差板部下面に当接している。
このため、可動プランジャ２１５に連結軸１３１を介して連結されている接点機構１０１の可動接触子１３０の接点部１３０ａが固定接触子１１１及び１１２の接点部１１８ａから上方に所定距離だけ離間している。このため、固定接触子１１１及び１１２間の電流路が遮断状態にあり、接点機構１０１が開極状態となっている。 At the same time, the attractive force due to the magnetic force of the annular permanent magnet 220 is applied to the auxiliary yoke 225, and the peripheral flange portion 216 of the movable plunger 215 is attracted. For this reason, the upper surface of the peripheral flange portion 216 of the movable plunger 215 is in contact with the lower surface of the step plate portion of the auxiliary yoke 225.
For this reason, the contact part 130a of the movable contact 130 of the contact mechanism 101 connected to the movable plunger 215 via the connection shaft 131 is spaced apart from the contact part 118a of the fixed contacts 111 and 112 upward by a predetermined distance. . For this reason, the current path between the stationary contacts 111 and 112 is in a disconnected state, and the contact mechanism 101 is in an open state.

このように、釈放状態では、可動プランジャ２１５に復帰スプリング２１４による付勢力と環状永久磁石２２０による吸引力との双方が作用しているので、可動プランジャ２１５が外部からの振動や衝撃等によって不用意に下降することがなく、誤動作を確実に防止することができる。
この釈放状態から、電磁石ユニット２００の励磁コイル２０８を励磁すると、この電磁石ユニット２００で励磁力を発生させて、可動プランジャ２１５を復帰スプリング２１４の付勢力及び環状永久磁石２２０の吸引力に抗して下方に押し下げる。 Thus, in the released state, both the urging force by the return spring 214 and the attractive force by the annular permanent magnet 220 are acting on the movable plunger 215, so that the movable plunger 215 is inadvertently caused by external vibration or impact. Therefore, it is possible to reliably prevent malfunction.
When the exciting coil 208 of the electromagnet unit 200 is energized from this released state, an exciting force is generated by the electromagnet unit 200 and the movable plunger 215 is resisted against the biasing force of the return spring 214 and the attractive force of the annular permanent magnet 220. Press down.

このように、可動プランジャ２１５が下降することにより、可動プランジャ２１５に連結軸１３１を介して連結されている可動接触子１３０も下降し、その接点部１３０ａが固定接触子１１１及び１１２の接点部１１８ａに接触スプリング１３４の接触圧で接触する。
このため、外部電力供給源の大電流が固定接触子１１１、可動接触子１３０、及び固定接触子１１２を通じて負荷に供給される閉極状態となる。 As described above, when the movable plunger 215 is lowered, the movable contact 130 connected to the movable plunger 215 via the connecting shaft 131 is also lowered, and the contact portion 130a thereof is the contact portion 118a of the fixed contacts 111 and 112. In contact with the contact pressure of the contact spring 134.
For this reason, a closed state is reached in which a large current of the external power supply source is supplied to the load through the fixed contact 111, the movable contact 130, and the fixed contact 112.

このとき、固定接触子１１１及び１１２と可動接触子１３０との間に可動接触子１３０を開極させる方向の電磁反発力が発生する。
しかしながら、固定接触子１１１及び１１２は、図１に示すように、上板部１１６、中間板部１１７及び下板部１１８によってＣ字状部１１５が形成されているので、上板部１１６及び下板部１１８とこれに対向する可動接触子１３０とで逆方向の電流が流れることになる。 At this time, an electromagnetic repulsive force is generated between the fixed contacts 111 and 112 and the movable contact 130 in a direction for opening the movable contact 130.
However, as shown in FIG. 1, the fixed contactors 111 and 112 have a C-shaped portion 115 formed by the upper plate portion 116, the intermediate plate portion 117, and the lower plate portion 118. A current in the reverse direction flows between the plate portion 118 and the movable contact 130 facing the plate portion 118.

このため、固定接触子１１１及び１１２の下板部１１８が形成する磁界と可動接触子１３０に流れる電流の関係からフレミングの左手の法則により可動接触子１３０を固定接触子１１１及び１１２の接点部１１８ａに押し付けるローレンツ力を発生することができる。
このローレンツ力によって、固定接触子１１１及び１１２の接点部１１８ａと可動接触子１３０の接点部１３０ａ間に発生する開極方向の電磁反発力に抗することが可能となり、可動接触子１３０の接点部１３０ａが開極することを確実に防止することができる。 Therefore, from the relationship between the magnetic field formed by the lower plate portion 118 of the fixed contacts 111 and 112 and the current flowing through the movable contact 130, the movable contact 130 is connected to the contact portion 118a of the fixed contacts 111 and 112 according to Fleming's left-hand rule. The Lorentz force that presses against the surface can be generated.
By this Lorentz force, it becomes possible to resist the electromagnetic repulsion force in the opening direction generated between the contact portions 118a of the fixed contacts 111 and 112 and the contact portion 130a of the movable contact 130, and the contact portion of the movable contact 130 It is possible to reliably prevent the 130a from opening.

このため、可動接触子１３０を支持する接触スプリング１３４の押圧力を小さくすることができ、これに応じて励磁コイル２０８で発生する推力も小さくすることができ、電磁接触器全体の構成を小型化することができる。
この接点機構１０１の閉極状態から、負荷への電流供給を遮断する場合には、電磁石ユニット２００の励磁コイル２０８の励磁を停止する。
これによって、電磁石ユニット２００で可動プランジャ２１５を下方に移動させる励磁力がなくなることにより、可動プランジャ２１５が復帰スプリング２１４の付勢力によって上昇し、周鍔部２１６が補助ヨーク２２５に近づくに従って環状永久磁石２２０の吸引力が増加する。 For this reason, the pressing force of the contact spring 134 that supports the movable contact 130 can be reduced, and the thrust generated by the exciting coil 208 can be reduced accordingly, and the configuration of the entire electromagnetic contactor can be reduced in size. can do.
When the current supply to the load is cut off from the closed state of the contact mechanism 101, the excitation of the excitation coil 208 of the electromagnet unit 200 is stopped.
As a result, the exciting force that moves the movable plunger 215 downward by the electromagnet unit 200 disappears, so that the movable plunger 215 rises by the urging force of the return spring 214, and the annular permanent magnet 216 as the peripheral flange 216 approaches the auxiliary yoke 225. The suction force of 220 increases.

この可動プランジャ２１５が上昇することにより、連結軸１３１を介して連結された可動接触子１３０が上昇する。これに応じて接触スプリング１３４で接触圧を与えている間は可動接触子１３０が固定接触子１１１及び１１２に接触している。その後、接触スプリング１３４の接触圧がなくなった時点で可動接触子１３０が固定接触子１１１及び１１２から上方に離間する開極状態となる。
この開極状態となると、固定接触子１１１及び１１２の接点部１１８ａと可動接触子１３０の接点部１３０ａとの間にアークが発生し、このアークによって電流の通電状態が継続される。 As the movable plunger 215 rises, the movable contact 130 connected via the connecting shaft 131 rises. In response to this, the movable contact 130 is in contact with the stationary contacts 111 and 112 while the contact pressure is applied by the contact spring 134. After that, when the contact pressure of the contact spring 134 disappears, the movable contact 130 is in an open state in which it is separated upward from the fixed contacts 111 and 112.
In this open state, an arc is generated between the contact part 118a of the fixed contacts 111 and 112 and the contact part 130a of the movable contact 130, and the current conduction state is continued by this arc.

このとき、固定接触子１１１及び１１２のＣ字状部１１５の上板部１１６及び中間板部１１７を覆う絶縁カバー１２１が装着されているので、アークが固定接触子１１１及び１１２の接点部１１８ａと可動接触子１３０の接点部１３０ａとの間のみに発生させることができる。このため、アークの発生状態を安定させることができ、アークをアーク消弧室１４５又は１４６へ引き伸ばして消弧することができ、消弧性能を向上させることができる。   At this time, since the insulating cover 121 that covers the upper plate portion 116 and the intermediate plate portion 117 of the C-shaped portion 115 of the fixed contacts 111 and 112 is attached, the arc is connected to the contact portion 118a of the fixed contacts 111 and 112. It can be generated only between the contact 130a of the movable contact 130. For this reason, the generation | occurrence | production state of an arc can be stabilized, an arc can be extended to the arc extinguishing chamber 145 or 146, and can be extinguished, and arc extinguishing performance can be improved.

また、Ｃ字状部１１５の上板部１１６及び中間板部１１７が絶縁カバー１２１で覆われているので、可動接触子１３０の両端部とＣ字状部１１５の上板部１１６及び中間板部１１７の間の絶縁カバー１２１によって絶縁距離を確保することができ、可動接触子１３０の可動方向の高さを短縮することができる。したがって、接点装置１００を小型化することができる。   Further, since the upper plate portion 116 and the intermediate plate portion 117 of the C-shaped portion 115 are covered with the insulating cover 121, both end portions of the movable contact 130 and the upper plate portion 116 and the intermediate plate portion of the C-shaped portion 115 are covered. The insulation cover 121 between 117 can secure an insulation distance, and the height of the movable contact 130 in the movable direction can be shortened. Therefore, the contact device 100 can be reduced in size.

さらに、固定接触子１１１，１１２の中間板部１１７の内側面には磁性体板１１９によって覆われているので、この中間板部１１７を流れる電流によって発生する磁場が磁性体板１１９によってシールドされる。このため、固定接触子１１１，１１２の接点部１１８ａ及び可動接触子１３０の接点部１３０ａ間に発生するアークによる磁場と中間板部１１７を流れる電流によって発生する磁場とが干渉することはなく、中間板部１１７を流れる電流によって発生する磁場にアークが影響されることを防止できる。   Further, since the inner surface of the intermediate plate portion 117 of the fixed contacts 111 and 112 is covered with the magnetic plate 119, the magnetic field generated by the current flowing through the intermediate plate portion 117 is shielded by the magnetic plate 119. . For this reason, the magnetic field generated by the arc generated between the contact portions 118a of the fixed contacts 111 and 112 and the contact portion 130a of the movable contact 130 does not interfere with the magnetic field generated by the current flowing through the intermediate plate portion 117. It is possible to prevent the arc from being affected by the magnetic field generated by the current flowing through the plate portion 117.

一方、アーク消弧用永久磁石１４３及び１４４の対向磁極面がＮ極であり、その外側がＳ極であるので、このＮ極が出た磁束が、平面から見て図４（ａ）に示すように、各アーク消弧用永久磁石１４３及び１４４固定接触子１１１の接点部１１８ａと可動接触子１３０の接点部１３０ａとの対向部のアーク発生部を可動接触子１３０の長手方向に内側から外側に横切ってＳ極に達して磁界が形成される。同様に、固定接触子１１２の接点部１１８ａと可動接触子１３０の接点部１３０ａのアーク発生部を可動接触子１３０の長手方向に内側から外側に横切ってＳ極に達して磁界が形成される。   On the other hand, since the opposing magnetic pole surfaces of the arc extinguishing permanent magnets 143 and 144 are N poles and the outside thereof is the S pole, the magnetic flux emitted from the N poles is shown in FIG. As described above, the arc generating part of the opposing part of the contact part 118a of each arc extinguishing permanent magnet 143 and 144 fixed contactor 111 and the contact part 130a of the movable contactor 130 is arranged in the longitudinal direction of the movable contactor 130 from the inside to the outside. A magnetic field is formed by reaching the south pole. Similarly, the arc generation part of the contact part 118a of the fixed contactor 112 and the contact part 130a of the movable contactor 130 crosses from the inside to the outside in the longitudinal direction of the movable contactor 130 and reaches the S pole to form a magnetic field.

したがって、アーク消弧用永久磁石１４３及び１４４の磁束がともに固定接触子１１１の接点部１１８ａ及び可動接触子１３０の接点部１３０ａ間と、固定接触子１１２の接点部１１８ａ及び可動接触子１３０の接点部１３０ａ間を可動接触子１３０の長手方向で互いに逆方向に横切ることになる。
このため、固定接触子１１１の接点部１１８ａと可動接触子１３０の接点部１３０ａとの間では、図４（ｂ）に示すように、電流Ｉが固定接触子１１１側から可動接触子１３０側に流れるとともに、磁束Φの向きが内側から外側に向かう方向となる。このため、フレミングの左手の法則によって、図４（ｃ）に示すように、可動接触子１３０の長手方向と直交し且つ固定接触子１１１の接点部１１８ａと可動接触子１３０との開閉方向と直交してアーク消弧室１４５側に向かう大きなローレンツ力Ｆが作用する。 Therefore, the magnetic fluxes of the arc extinguishing permanent magnets 143 and 144 are both between the contact portion 118a of the fixed contact 111 and the contact portion 130a of the movable contact 130, and between the contact portion 118a of the fixed contact 112 and the contact of the movable contact 130. The portions 130a cross in the opposite directions in the longitudinal direction of the movable contact 130.
For this reason, between the contact part 118a of the fixed contactor 111 and the contact part 130a of the movable contactor 130, as shown in FIG. 4B, the current I flows from the fixed contactor 111 side to the movable contactor 130 side. As it flows, the direction of the magnetic flux Φ becomes the direction from the inside toward the outside. Therefore, according to Fleming's left-hand rule, as shown in FIG. 4C, it is orthogonal to the longitudinal direction of the movable contact 130 and orthogonal to the opening / closing direction of the contact portion 118 a of the fixed contact 111 and the movable contact 130. Then, a large Lorentz force F toward the arc extinguishing chamber 145 acts.

このローレンツ力Ｆによって、固定接触子１１１の接点部１１８ａと可動接触子１３０の接点部１３０ａとの間に発生したアーク１４９が、図２に示すように、固定接触子１１１の接点部１１８ａの側面からアーク消弧室１４５の内壁まで伸ばされ、この内壁に沿って可動接触子１３０の上面側に達するように大きく引き伸ばされる。
このように、アークがアーク消弧室１４５の内壁面に沿う状態となると、アーク消弧室１４５の内壁面に多数の突起１４７を突出させた凹凸部１４８が形成されている。このため、アーク消弧室１４５の内壁面の表面積が増加するとともに、壁面近傍の気流を乱して乱流とすることができ、アーク消弧室１４５の壁面への熱伝達率を大幅に高めることができるとともに、熱交換量の飽和を確実に抑制することができる。したがって、アークの熱をアーク消弧室１４５の壁面内に効率よく伝熱することにより、アークの冷却を十分に行うことが可能となる。 Due to the Lorentz force F, an arc 149 generated between the contact part 118a of the fixed contactor 111 and the contact part 130a of the movable contactor 130 has a side surface of the contact part 118a of the fixed contactor 111 as shown in FIG. To the inner wall of the arc extinguishing chamber 145, and is greatly stretched so as to reach the upper surface side of the movable contact 130 along the inner wall.
As described above, when the arc is in a state along the inner wall surface of the arc extinguishing chamber 145, the uneven portion 148 in which a large number of protrusions 147 protrude from the inner wall surface of the arc extinguishing chamber 145 is formed. For this reason, the surface area of the inner wall surface of the arc extinguishing chamber 145 is increased, and the air flow in the vicinity of the wall surface can be turbulent to form a turbulent flow, thereby greatly increasing the heat transfer rate to the wall surface of the arc extinguishing chamber 145. In addition, the saturation of the heat exchange amount can be reliably suppressed. Therefore, the arc can be sufficiently cooled by efficiently transferring the arc heat into the wall of the arc extinguishing chamber 145.

この結果、アーク電圧を高めることができ、所定のアーク電圧を得るためのアーク長を短くすることができる。したがって、アークを引き伸ばすための消弧スペースを小さくすることができ、接点装置１００の小型化・軽量化を図ることができる。
また、アーク長が短くなると、遮断完了までの時間（アーク持続時間）が短くなり、固定接触子及び可動接触子の接点の消耗を抑制することが可能となり、コンタクタとしての長寿命化を図ることができる。 As a result, the arc voltage can be increased, and the arc length for obtaining a predetermined arc voltage can be shortened. Therefore, the arc extinguishing space for extending the arc can be reduced, and the contact device 100 can be reduced in size and weight.
Also, when the arc length is shortened, the time until completion of interruption (arc duration) is shortened, and it becomes possible to suppress the consumption of the contacts of the stationary contact and the movable contact, thereby extending the life of the contactor. Can do.

一方、固定接触子１１２の接点部１１８ａと可動接触子１３０との間では、図４（ｂ）に示すように、電流Ｉが可動接触子１３０側から固定接触子１１２側に流れるとともに、磁束Φの向きが内側から外側に向かう右方向となる。このため、フレミングの左手の法則によって、可動接触子１３０の長手方向と直交し且つ固定接触子１１２の接点部１１８ａと可動接触子１３０との開閉方向と直交してアーク消弧室１４５側に向かう大きなローレンツ力Ｆが作用する。   On the other hand, between the contact portion 118a of the fixed contact 112 and the movable contact 130, as shown in FIG. 4B, the current I flows from the movable contact 130 side to the fixed contact 112 side and the magnetic flux Φ. Is the right direction from the inside to the outside. For this reason, according to Fleming's left-hand rule, the arc extinguishing chamber 145 is directed to the arc extinguishing chamber 145 side perpendicular to the longitudinal direction of the movable contact 130 and perpendicular to the opening / closing direction of the contact portion 118a of the fixed contact 112 and the movable contact 130. A large Lorentz force F acts.

このローレンツ力Ｆによって、固定接触子１１２の接点部１１８ａと可動接触子１３０との間に発生したアークが、可動接触子１３０の上面側からアーク消弧室１４５内に沿って大きく引き伸ばされる。ここでも、アーク消弧室１４５の内壁面に多数の円柱状突起１４７を配置した凹凸部１４８が形成されているので、前述した固定接触子１１１の接点部１１８ａと可動接触子１３０との間と同様に熱伝達率を高めて、アークを十分に冷却し、アークを確実に遮断することができる。   By this Lorentz force F, the arc generated between the contact portion 118 a of the fixed contact 112 and the movable contact 130 is greatly stretched along the arc extinguishing chamber 145 from the upper surface side of the movable contact 130. Also here, since the uneven portion 148 is formed on the inner wall surface of the arc extinguishing chamber 145 with a large number of columnar protrusions 147, between the contact portion 118 a of the fixed contact 111 and the movable contact 130 described above. Similarly, the heat transfer rate can be increased to sufficiently cool the arc and reliably interrupt the arc.

一方、電磁接触器１０の投入状態で、負荷側から直流電源側に回生電流が流れている状態で、釈放状態とする場合には、前述した図４（ｂ）における電流の方向が逆となることから、ローレンツ力Ｆがアーク消弧室１４６側に作用し、アークがアーク消弧室１４６側に引き伸ばされることを除いては同様の消弧機能が発揮される。
このとき、アーク消弧用永久磁石１４３及び１４４は絶縁筒体１４０に形成された磁石収納ポケット１４１及び１４２内に配置されているので、アークが直接アーク消弧用永久磁石１４３及び１４４に接触することがない。このため、アーク消弧用永久磁石１４３及び１４４の磁気特性を安定して維持することができ、遮断性能を安定化させることができる。 On the other hand, when the electromagnetic contactor 10 is turned on and the regenerative current is flowing from the load side to the DC power source side and the release state is set, the direction of the current in FIG. 4B is reversed. Therefore, the same arc extinguishing function is exhibited except that the Lorentz force F acts on the arc extinguishing chamber 146 side and the arc is extended to the arc extinguishing chamber 146 side.
At this time, since the arc extinguishing permanent magnets 143 and 144 are arranged in the magnet storage pockets 141 and 142 formed in the insulating cylinder 140, the arc directly contacts the arc extinguishing permanent magnets 143 and 144. There is nothing. For this reason, the magnetic characteristics of the arc extinguishing permanent magnets 143 and 144 can be stably maintained, and the interruption performance can be stabilized.

また、絶縁筒体１４０によって、金属製の角筒体１０４の内周面を覆って絶縁できるので、電流遮断時のアークの短絡がなく、確実に電流遮断を行うことができる。
さらに、絶縁機能、アーク消弧用永久磁石１４３及び１４４の位置決め機能及びアーク消弧用永久磁石１４３及び１４４のアークからの保護機能を１つの絶縁筒体１４０で行うことができるので、製造コストを低減させることができる。 Further, since the insulating cylinder 140 can cover and insulate the inner peripheral surface of the metal square cylinder 104, there is no short circuit of the arc when the current is interrupted, and the current can be reliably interrupted.
Furthermore, since the insulating function, the positioning function of the arc extinguishing permanent magnets 143 and 144 and the arc extinguishing permanent magnets 143 and 144 can be protected from the arc by one insulating cylinder 140, the manufacturing cost can be reduced. Can be reduced.

なお、上記実施形態においては、凹凸部１４８を多数の円柱状突起１４７で構成した場合について説明したが、これに限定されるものではなく、三角柱、四角柱や、六角柱、八角柱等の角柱形状や、円錐や三角錐、四角錐等の多角錐等の錐形状や、半球形状等の任意の形状とすることができる他、突起に代えて凹部を形成するようにしてもよい。
また、凹凸部１４８は絶縁筒体１４０の内周面の全面に設ける必要はなく、少なくとも開極時に発生するアークが触れる内壁面にのみ形成すればよい。 In the above embodiment, the case where the concavo-convex portion 148 is configured by a large number of columnar protrusions 147 has been described. However, the present invention is not limited to this, and prismatic columns such as triangular columns, quadrangular columns, hexagonal columns, and octagonal columns are used. In addition to a shape, a conical shape such as a cone, a triangular pyramid, a polygonal pyramid such as a quadrangular pyramid, or an arbitrary shape such as a hemispherical shape, a concave portion may be formed instead of the protrusion.
Further, the uneven portion 148 does not need to be provided on the entire inner peripheral surface of the insulating cylinder 140, and may be formed only on the inner wall surface touched by an arc generated at the time of opening the electrode.

また、上記実施形態においては、接点装置１００の接点収納ケース１０２を金属角筒体１０４と固定接点支持絶縁基板１０５と絶縁筒体１４０で構成する場合について説明したが、これに限定されるものではなく、固定接点支持絶縁基板１０５を省略して、下端を開放した桶状の絶縁筒体とその下面を覆う絶縁底板とで構成することができる。
また、接点機構１０１も上記実施形態の構成に限定されるものではなく、任意の構成の接点機構を適用することができる。 Further, in the above-described embodiment, the case where the contact storage case 102 of the contact device 100 is configured by the metal square tube body 104, the fixed contact support insulating substrate 105, and the insulating tube body 140 has been described, but the present invention is not limited to this. Alternatively, the fixed contact supporting insulating substrate 105 can be omitted, and it can be constituted by a bowl-shaped insulating cylinder having an open lower end and an insulating bottom plate covering the lower surface thereof.
Moreover, the contact mechanism 101 is not limited to the structure of the said embodiment, The contact mechanism of arbitrary structures can be applied.

例えば、図５（ａ）及び（ｂ）に示すように、支持導体部１１４にＣ字状部１１５における上板部１１６を省略した形状となるＬ字状部１６０を連結するようにしてもよい。この場合でも、固定接触子１１１及び１１２に可動接触子１３０を接触させた閉極状態で、Ｌ字状部１６０の垂直板部を流れる電流によって生じる磁束を固定接触子１１１及び１１２と可動接触子１３０との接触部に作用させることができる。このため、固定接触子１１１及び１１２と可動接触子１３０との接触部における磁束密度を高めて電磁反発力に抗するローレンツ力を発生させることができる。
また、図６（ａ）及び（ｂ）に示すように、凹部１３２を省略して平板状に形成するようにしてもよい。 For example, as shown in FIGS. 5A and 5B, an L-shaped portion 160 having a shape in which the upper plate portion 116 in the C-shaped portion 115 is omitted may be coupled to the support conductor portion 114. . Even in this case, the magnetic flux generated by the current flowing through the vertical plate portion of the L-shaped portion 160 in a closed state in which the movable contact 130 is brought into contact with the fixed contacts 111 and 112, and the fixed contacts 111 and 112 and the movable contact. It can be made to act on a contact part with 130. For this reason, the Lorentz force which resists an electromagnetic repulsive force by raising the magnetic flux density in the contact part of the stationary contacts 111 and 112 and the movable contact 130 can be generated.
Further, as shown in FIGS. 6A and 6B, the recess 132 may be omitted and formed in a flat plate shape.

また、上記実施形態においては、可動プランジャ２１５に連結軸１３１を螺合させる場合について説明したが、螺合に限らず、任意の接続方法を適用することができ、さらには可動プランジャ２１５と連結軸１３１とを一体に形成するようにしてもよい。
また、連結軸１３１と可動接触子１３０との連結が、連結軸１３１の先端部にフランジ部１３１ａを形成し、接触スプリング１３４及び可動接触子１３０を挿通してから可動接触子１３０の下端をＣリングで固定する場合について説明したが、これに限定されるものではない。すなわち、連結軸１３１のＣリング位置に半径方向に突出する位置決め大径部を形成し、これに可動接触子１３０を当接させてから接触スプリング１３４を配置し、この接触スプリング１３４の上端をＣリングによって固定するようにしてもよい。 In the above-described embodiment, the case where the connecting shaft 131 is screwed to the movable plunger 215 has been described. However, the present invention is not limited to screwing, and any connection method can be applied. Further, the movable plunger 215 and the connecting shaft can be applied. 131 may be integrally formed.
In addition, the connection between the connecting shaft 131 and the movable contact 130 forms a flange portion 131a at the tip of the connecting shaft 131, and the lower end of the movable contact 130 is inserted into the C after inserting the contact spring 134 and the movable contact 130. Although the case where it fixes with a ring was demonstrated, it is not limited to this. That is, a positioning large-diameter portion that protrudes in the radial direction is formed at the C-ring position of the connecting shaft 131, and the contact spring 134 is disposed after the movable contact 130 is brought into contact with the positioning large-diameter portion. You may make it fix with a ring.

また、電磁石ユニット２００についても、上記構成に限定されるものではなく、任意の構成の電磁石ユニットを適用することができ、要は可動接触子１３０を固定接触子１１１及び１１２に対して接離可能に駆動できればよいものである。
また、上記実施形態においては、接点収納ケース１０２及びキャップ２３０で密封容器を構成し、この密封容器内にガスを封入する場合について説明したが、これに限定されるものではなく、遮断する電流が低い場合にはガス封入を省略するようにしてもよい。 Further, the electromagnet unit 200 is not limited to the above configuration, and an electromagnet unit having an arbitrary configuration can be applied. In short, the movable contact 130 can be connected to and separated from the fixed contacts 111 and 112. It is only necessary to be able to be driven.
In the above embodiment, the case where the contact container 102 and the cap 230 form a sealed container and the gas is sealed in the sealed container has been described. If it is low, gas filling may be omitted.

１０…電磁接触器、１１…外装絶縁容器、１００…接点装置、１０１…接点機構、１０２…接点収納ケース、１０４…金属角筒体、１０５…固定接点支持絶縁基板、１１１，１１２…固定接触子、１１４…支持導体部、１１５…Ｃ字状部、１２１…絶縁カバー、１３０…可動接触子、１３０ａ…接点部、１３１…連結軸、１３４…接触スプリング、１４０…絶縁筒体、１４１，１４２…磁石収納ポケット、１４３，１４４…アーク消弧用永久磁石、１４５，１４６…アーク消弧室、１４７…円柱状突起、１４８…凹凸部、２００…電磁石ユニット、２０１…磁気ヨーク、２０３…円筒状補助ヨーク、２０４…スプール、２０８…励磁コイル、２１０…上部磁気ヨーク、２１４…復帰スプリング、２１５…可動プランジャ   DESCRIPTION OF SYMBOLS 10 ... Electromagnetic contactor, 11 ... Exterior insulation container, 100 ... Contact apparatus, 101 ... Contact mechanism, 102 ... Contact storage case, 104 ... Metal square cylinder, 105 ... Fixed contact support insulation board, 111, 112 ... Fixed contact , 114 ... support conductor part, 115 ... C-shaped part, 121 ... insulating cover, 130 ... movable contact, 130a ... contact part, 131 ... connecting shaft, 134 ... contact spring, 140 ... insulating cylinder, 141, 142 ... Magnet storage pocket, 143, 144 ... permanent magnet for arc extinguishing, 145, 146 ... arc extinguishing chamber, 147 ... cylindrical projection, 148 ... uneven part, 200 ... electromagnet unit, 201 ... magnetic yoke, 203 ... cylindrical auxiliary Yoke, 204 ... spool, 208 ... exciting coil, 210 ... upper magnetic yoke, 214 ... return spring, 215 ... movable plunger

Claims (4)

接点収納ケースの絶縁性を有する合成樹脂製の絶縁筒体内に所定間隔を保って配置された一対の固定接触子に対して可動接触子を接離可能に配置するとともに、前記絶縁筒体における一対の固定接触子の接点と可動接触子の接点との接触位置の当該可動接触子の延長方向と交差する位置にアーク消弧室を形成し、
前記アーク消弧室を形成する前記絶縁筒体のアーク接触面に熱伝達率を高める凹凸部を点在させたことを特徴とする電磁接触器。 A movable contact is arranged so as to be able to contact and separate with respect to a pair of fixed contacts arranged at predetermined intervals in an insulating cylinder made of synthetic resin having insulating properties of the contact housing case, and a pair of the insulating cylinders Forming an arc extinguishing chamber at a position where the contact position between the contact of the fixed contact and the contact of the movable contact intersects with the extending direction of the movable contact;
An electromagnetic contactor characterized in that the arc contact surface of the insulating cylindrical body forming the arc extinguishing chamber is interspersed with uneven portions for increasing the heat transfer coefficient . 前記凹凸部はアーク接触面に沿う気流を乱流状態とするように配列されていることを特徴とする請求項１に記載の電磁接触器。   The electromagnetic contactor according to claim 1, wherein the concavo-convex portions are arranged so that the airflow along the arc contact surface is in a turbulent state. 前記凹凸部は前記アーク消弧室の一対の固定接触子の接点及び可動接触子の接点に対向する面に千鳥状に配列させたことを特徴とする請求項２に記載の電磁接触器。   The electromagnetic contactor according to claim 2, wherein the concave and convex portions are arranged in a staggered manner on a surface of the arc extinguishing chamber that faces the contact of the pair of fixed contact and the contact of the movable contact. 前記凹凸部は、円柱形状、角柱形状、円錐形状、角錐形状、半球形状の少なくとも１つの形状の凹部及び凸部の少なくとも一方で構成されていることを特徴とする請求項１から３の何れか１項に記載の電磁接触器。   The said uneven | corrugated | grooved part is comprised at least one of the recessed part and convex part of at least 1 shape of cylindrical shape, prismatic shape, cone shape, pyramid shape, and hemispherical shape, The any one of Claim 1 to 3 characterized by the above-mentioned. The electromagnetic contactor according to item 1.
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