JPH0377229A - Electromagnetic switch - Google Patents

Abstract

PURPOSE:To improve insulation between phases as well as minimize tilting of a cross bar for eliminating characteristics fluctuation at the time of assembly by placing an elastic rubber board between an electromagnet and an insulating board. CONSTITUTION:In assembling an electromagnetic switch, a cross bar 5 is inserted from below a cover 4 while an opening of the cover 4 is closed by an insulating board 8 and a mount 1 with an electromagnet 3 housed and the cover 4 are engaged with each other by an engaging hole 1a and an engaging protrusion 4a. At this time a rubber board 9 is placed between the electromagnet 3 and the insulating board 8 wherein the insulating board 8 is pressed against and fixed to the lower end of a contact slit wall 4b of the cover. On the other hand, the insulating board 8 pushes up the cover 4 for eliminating a gap between the engaging hole 1a and the engaging protrusion 4a so that the cover 4 is completely fixed to the mount 1. Since the insulating board 8 is closely attached to the cover 4, the gap between the insulating board 8 and the cross bar 5 is minimized thereby minimizing tilting of the cross bar 5.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、電磁開閉器に係り、特に接点構成部の密閉
状態改善に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electromagnetic switch, and particularly to improving the sealing state of a contact component.

〔従来の技術〕[Conventional technology]

第４図は従来の電磁開閉器の分解斜視図、第５図は従来
の電磁開閉器の要部を示す部分断面図。FIG. 4 is an exploded perspective view of a conventional electromagnetic switch, and FIG. 5 is a partial sectional view showing the main parts of the conventional electromagnetic switch.

第６図は第５図に示す部分を直交する角度から見た部分
断面図であり１図において、（１）は電磁開閉器を制御
盤に取付ける取付台、　（Ｉａ）は取付台の開口部に向
かいあうように配置された係合孔、（２）は取付台（１
）の内部に収納され、第５図の横方向に駆動する電磁石
、（３）は電磁石の駆動力を伝えるレバー、　（４）は
取付台（１）と組合わせ、外部ケースを構成するカバー
、　（４ａ）は取付台の係合孔（１ａ）に対するカバー
の係合突起、　（４ｂ）は第２図における接点間の絶縁
距離を保つカバーの接点間隔壁、（５）はカバー（４）
の内部に収納され、レバー（３）から受ける駆動力によ
り、第２図の横方向へ摺動するクロスバ−２（６）はク
ロスバ−（５）に取付けられた可動接触子、（７）は可
動接触子（６）に対向し、カバー（４）に取付けられた
固定接触子、（８）は可動接触子（６）と固定接触子（
７）の間に通電する電流から電磁石（２）を絶縁する絶
縁板である。Fig. 6 is a partial cross-sectional view of the part shown in Fig. 5 viewed from an angle perpendicular to it. The engagement holes (2) are arranged to face the mounting base (1).
) is housed inside and drives in the lateral direction as shown in Figure 5, (3) is a lever that transmits the driving force of the electromagnet, (4) is a cover that, in combination with the mounting base (1), constitutes the external case; (4a) is the engagement protrusion of the cover for the engagement hole (1a) of the mounting base, (4b) is the contact spacing wall of the cover that maintains the insulation distance between the contacts in Fig. 2, and (5) is the cover (4).
The crossbar 2 (6), which is housed inside the crossbar and slides in the horizontal direction in Fig. 2 by the driving force received from the lever (3), is a movable contactor attached to the crossbar (5); The fixed contact (8) is opposite to the movable contact (6) and is attached to the cover (4).
7) is an insulating plate that insulates the electromagnet (2) from the current flowing during the period.

次に作用について説明する。電磁開閉器の組立てでは、
第４図に示すようにカバー（４）の下より。Next, the effect will be explained. When assembling an electromagnetic switch,
From below the cover (4) as shown in Figure 4.

クロスバ−（５）を挿入し、カバー（４）の開口部を絶
縁板（８）にて閉じ、電磁石（２）を収納した取付台（
１）とカバー（４）を互いの係合孔（１ａ）と係合突起
（４ａ）により係合する。Insert the crossbar (5), close the opening of the cover (4) with the insulating plate (8), and attach the mounting base (2) containing the electromagnet (2).
1) and the cover (4) are engaged with each other through their engagement holes (1a) and engagement protrusions (4a).

この状態において２寸法績度に余裕をもたせるため、絶
縁板（８）が納まる空間は絶縁板（８）の厚みより大き
めに設計され、第５図に示すＡのすきまが絶縁板（８）
と接点間隔壁（４ｂ）の間に生じる。In this state, in order to provide a margin for the two-dimensional performance, the space in which the insulating plate (8) is accommodated is designed to be larger than the thickness of the insulating plate (8), and the gap A shown in Figure 5 is between the insulating plate (8).
and the contact spacing wall (4b).

同様に、係合可能とするために取付台（１）とカバー（
４）の各係合部分にも寸法的な余裕を与えることがさけ
られず、第６図に示すＢのすきまが、係合孔（ｌａ）の
上縁と係合突起（４ａ）の間に生じる。Similarly, the mount (1) and the cover (
4) It is also necessary to provide a dimensional allowance for each engaging part, and the gap B shown in Fig. 6 is provided between the upper edge of the engaging hole (la) and the engaging protrusion (4a). arise.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

従来の電磁開閉器は以上のように構成されているので、
カバーの接点間隔壁（４ａ）と絶縁板（８）の間にすき
まが生じるので、電流シャ断時に出るアークによる相間
短絡が起こった。またクロスバ−（５）と絶縁板（８）
の間のすきまも大きいためクロスバ−（５）が傾きやす
いという問題点があった。一方取付台の係合孔（１ａ）
とカバーの係合突起（４ａ）のすきまにより、カバー（
４）の取付台（１）に対する位置が安定せず１組立の状
態により、特性に悪影響を及ぼす危険性があった。Conventional electromagnetic switches are configured as described above, so
Since a gap was created between the contact spacing wall (4a) of the cover and the insulating plate (8), a short circuit between phases occurred due to an arc generated when the current was cut off. In addition, the crossbar (5) and the insulating plate (8)
There was a problem in that the crossbar (5) was prone to tilt because the gap between the two was large. On the other hand, the engagement hole of the mounting base (1a)
The cover (
The position of 4) with respect to the mounting base (1) was unstable, and there was a risk that the characteristics would be adversely affected due to the state of 1 assembly.

この発明は上記のような問題点を解決するためになされ
たもので、カバーの接点間隔壁と絶縁板の間のすきまを
なくして相聞の絶縁状態を改善し同時にクロスバ−の傾
きを最小限にとどめることができるとともに、カバーを
取付台に完全に固定することができ１組立時の特性変化
のない電磁開閉器を得ることを目的とする。This invention was made to solve the above-mentioned problems, and aims to eliminate the gap between the contact spacing wall of the cover and the insulating plate to improve the insulation condition between them, and at the same time to minimize the inclination of the crossbar. It is an object of the present invention to provide an electromagnetic switch in which the cover can be completely fixed to the mounting base and the characteristics do not change during one assembly.

〔課題を解決するための手段〕[Means to solve the problem]

この発明に係る電磁開閉器は、開口縁の対向辺に係合孔
を有する樹脂製の取付台と、前記取付台に収納され、平
鉄板を外枠に有するプランジャ形電磁石と、摺動方向に
配列された可動接触子を支え、前記電磁石の駆動力をレ
バーを介して受けて平行移動するクロスバ−と、前記可
動接触子に対向する固定接触子を備え、前記クロスバ−
を収納するとともに、前記接触子群の絶縁距離を保つ接
点間隔壁及び前記取付台の係合孔との係合突起を有する
樹脂製のカバーと、前記カバーと前記電磁石の間に配置
された絶縁板を備える電磁開閉器において、前記電磁石
と前記絶縁板の間に弾性的なゴム板を配置したものであ
る。The electromagnetic switch according to the present invention includes a mounting base made of resin having engagement holes on opposite sides of an opening edge, a plunger-shaped electromagnet housed in the mounting base and having a flat iron plate as an outer frame, and a plunger-shaped electromagnet arranged in a sliding direction. A crossbar that supports arranged movable contacts and moves in parallel by receiving the driving force of the electromagnet via a lever, and a fixed contact that faces the movable contacts, the crossbar
a resin cover having a contact spacing wall for accommodating the contact group and maintaining an insulating distance between the contact groups and an engagement protrusion with the engagement hole of the mounting base; and an insulator disposed between the cover and the electromagnet. In the electromagnetic switch including a plate, an elastic rubber plate is arranged between the electromagnet and the insulating plate.

〔作用〕[Effect]

この発明におけるゴム板は１弾性力により、絶縁板をカ
バーに密着させ、接点間隔壁と絶縁板の間のすきまをな
くすとともに、カバー全体を押しあげ、取付台との係合
部分のすきまをなくシ、カバーの動きを最小限にとどめ
ることができるようになる。The rubber plate in this invention uses elastic force to bring the insulating plate into close contact with the cover, eliminates the gap between the contact spacing wall and the insulating plate, and also pushes up the entire cover and eliminates the gap at the engagement part with the mounting base. Cover movement can be kept to a minimum.

〔実施例） 以下、この発明の一実施例を図について説明する。第１
図は電磁開閉器の分解斜視図、第２図は電磁開閉器の要
部を示す部分断面図、第３図は第２図に示す部分を直交
する角度から見た部分断面図である。図において、りｌ
）は電磁開閉器を制御盤に取付ける取付台、　（ｌａ）
は取付台の開口部に向かいあうように配置された係合孔
、（２）は取付台（１）の内部に収納され、第２図の横
方向に駆動する電磁石、（３）は電磁石（２）の駆動力
を上部へ伝えるレバー、　（４）は取付台（１）と組合
わせ、外部ケースを構成するカバー、　（４ａ）は取付
台の係合孔（ｌａ）に対するカバーの係合突起、　（４
ｂ）は第２図における接点間の絶縁距離を保つ接点間隔
壁、（５）はカバー（４）の内部に収納され、レバー（
３）から受ける駆動力により、第２図の横方向へ摺動す
るクロスバ−（６）はクロスバ−（５）に取付けられた
可動接触子（７）は可動接触子（６）に対向し、カバー
（４）に取付けられた固定接触子、（８）は可動接触子
（６）と固定接触子（７）の間に通電する電流から電磁
石（２）を絶縁する絶縁板、（９）は電磁石（２）の上
部鉄板と絶縁板（８）の間に設置し、絶縁板（８）をカ
バーの接点間隔壁（４ｂ）の下部に押しつける弾性のゴ
ム板である。[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. 1st
The figure is an exploded perspective view of the electromagnetic switch, FIG. 2 is a partial sectional view showing essential parts of the electromagnetic switch, and FIG. 3 is a partial sectional view of the part shown in FIG. In the figure, ri
) is a mounting base for attaching an electromagnetic switch to a control panel, (la)
(2) is an electromagnet that is housed inside the mounting base (1) and is driven in the horizontal direction in Figure 2. (3) is an electromagnet (2) that is arranged to face the opening of the mounting base. ) is a lever that transmits the driving force to the upper part; (4) is a cover that is combined with the mounting base (1) to form an external case; (4a) is an engagement protrusion of the cover that engages with the engagement hole (la) of the mounting base; (4
b) is a contact spacing wall that maintains the insulating distance between the contacts in Fig. 2, (5) is housed inside the cover (4), and the lever (
3), the crossbar (6) sliding in the horizontal direction in Fig. 2 causes the movable contact (7) attached to the crossbar (5) to face the movable contact (6), A fixed contact attached to the cover (4), (8) an insulating plate that insulates the electromagnet (2) from the current flowing between the movable contact (6) and the fixed contact (7), and (9) It is an elastic rubber plate installed between the upper iron plate of the electromagnet (2) and the insulating plate (8) to press the insulating plate (8) against the lower part of the contact spacing wall (4b) of the cover.

次に作用について説明する。電磁開閉器の組立てでは第
１図に示すように、カバー（４）の下よりクロスバ−（
５）を挿入し、カバー（４）の開口部を絶縁板（８）に
て閉じ、電磁石（２）を収納した取付台（１）とカバー
（４）を互いの係合孔（Ｉｇ）と係合突起（４ａ）によ
り係合する。この時、電磁石（２）と絶縁板（８）の間
にゴム板（９）を設置し、第２図に示すようにゴム板（
９）の弾性力により絶縁板（８）をカバーの接点間隔壁
（４ｂ）の下縁に押しつけ固定する。一方、絶縁板（８
）はカバー（４）を押しあげ２第３図に示すように係合
孔（１ａ）と係合突起（４ａ）の間のすきまをなくシ、
カバー（４）を取付台（１）へ完全に固定する。Next, the effect will be explained. When assembling the electromagnetic switch, as shown in Figure 1, remove the crossbar (
5), close the opening of the cover (4) with an insulating plate (8), and connect the mounting base (1) housing the electromagnet (2) and the cover (4) to each other's engagement hole (Ig). It is engaged by the engagement protrusion (4a). At this time, a rubber plate (9) is installed between the electromagnet (2) and the insulating plate (8), and the rubber plate (9) is placed between the electromagnet (2) and the insulating plate (8).
9), the insulating plate (8) is pressed against the lower edge of the contact spacing wall (4b) of the cover and fixed. On the other hand, the insulation plate (8
), push up the cover (4) and remove the gap between the engagement hole (1a) and the engagement protrusion (4a) as shown in Figure 3.
Completely fix the cover (4) to the mounting base (1).

また、絶縁板（８）をカバー（４）に密着させたので、
絶縁板（８）とクロスバ−（５）の間のすきまは最小と
なり、クロスバ−（５）の傾きを最小限にとどめること
ができる。Also, since the insulating plate (8) is brought into close contact with the cover (4),
The gap between the insulating plate (8) and the crossbar (5) is minimized, and the inclination of the crossbar (5) can be kept to a minimum.

〔発明の効果〕〔Effect of the invention〕

以上のように、この発明によれば、絶縁板と電磁石の間
にゴム板を配置することで、カバーと絶縁板を密着させ
、カバー下方の絶縁を強化し、内部での相聞短絡を防止
するとともに、クロスバ−の傾きを最小限にとどめるこ
とができ、また、カバーと取付台の係合部分のすきまを
なくシ、力／（−の位置を一定とすることで７組立によ
る特性変化を防止する効果がある。As described above, according to the present invention, by arranging the rubber plate between the insulating plate and the electromagnet, the cover and the insulating plate are brought into close contact with each other, the insulation below the cover is strengthened, and mutual short circuits inside the cover are prevented. At the same time, the inclination of the crossbar can be kept to a minimum, and by eliminating the gap between the engagement part of the cover and the mounting base, and by keeping the position of the force/(-) constant, changes in characteristics due to assembly are prevented. It has the effect of

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

第１図はこの発明の一実施例による電磁開閉器の分解斜
視図、第２図はこの発明による電磁開閉器要部を示す部
分断面図、第３図は第２図に示す部分を直交する角度か
ら見た部分断面図、第４図は従来の電磁開閉器を示す分
解斜視図、第５図は従来の電磁開閉器の要部を示す部分
断面図、第６図は第５図に示す部分を直交する角度から
見た部分断面図である。 図において、（１）は取付台、（ｌａ）は取付台の係合
孔、（２）は電磁石、（３）はレバー、（４）はカバー
、　（４ａ）はカバーの係合突起、　（４ｂ）は接点間
隔壁、（５）はクロスバ−２（６）は可動接触子、（７
）は固定接触子、（８）は絶縁板、（９）はゴム板であ
る。 なお、各図中同一符号は同一または相当部分を示す。Fig. 1 is an exploded perspective view of an electromagnetic switch according to an embodiment of the present invention, Fig. 2 is a partial cross-sectional view showing the main parts of the electromagnetic switch according to the invention, and Fig. 3 is a view orthogonal to the parts shown in Fig. 2. Figure 4 is an exploded perspective view showing a conventional electromagnetic switch; Figure 5 is a partial cross-sectional view showing the main parts of a conventional electromagnetic switch; Figure 6 is shown in Figure 5. FIG. 3 is a partial cross-sectional view of the portion viewed from an orthogonal angle. In the figure, (1) is the mounting base, (la) is the engagement hole of the mounting base, (2) is the electromagnet, (3) is the lever, (4) is the cover, (4a) is the engagement protrusion of the cover, ( 4b) is the contact spacing wall, (5) is the crossbar 2 (6) is the movable contact, (7
) is a fixed contact, (8) is an insulating plate, and (9) is a rubber plate. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

【特許請求の範囲】[Claims] 開口縁の対向辺に係合孔を有する樹脂製の取付台と、前
記取付台に収納され、平鉄板を外枠に有するプランジャ
形電磁石と、摺動方向に配列された可動接触子を支え、
前記電磁石の駆動力をレバーを介して受けて平行移動す
るクロスバーと、前記可動接触子に対向する固定接触子
を備え、前記クロスバーを収納するとともに、前記接触
子群の絶縁距離を保つ接点間隔壁及び、前記取付台の係
合孔との係合突起を有する樹脂製のカバーと、前記カバ
ーと前記電磁石の間に配置された絶縁板を備える電磁開
閉器において、前記電磁石と前記絶縁板の間に弾性的な
ゴム板を配置したことを特徴とする電磁開閉器。a resin mounting base having engagement holes on opposite sides of the opening edge, a plunger-shaped electromagnet housed in the mounting base and having a flat iron plate as an outer frame, and supporting movable contacts arranged in the sliding direction;
A contact that includes a crossbar that receives the driving force of the electromagnet via a lever and moves in parallel, and a fixed contact that faces the movable contact, houses the crossbar and maintains an insulation distance between the contact groups. In an electromagnetic switch comprising a partition wall, a resin cover having an engagement protrusion with an engagement hole of the mounting base, and an insulating plate disposed between the cover and the electromagnet, between the electromagnet and the insulating plate. An electromagnetic switch characterized by having an elastic rubber plate placed on the top.