JP4416693B2

JP4416693B2 - Magnetic contactor

Info

Publication number: JP4416693B2
Application number: JP2005133189A
Authority: JP
Inventors: 宏貴今井
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2005-04-28
Filing date: 2005-04-28
Publication date: 2010-02-17
Anticipated expiration: 2025-04-28
Also published as: JP2006310184A

Description

本発明は、アークカバーを備えた電磁接触器に関するものである。 The present invention relates to an electromagnetic contactor having an arc cover.

従来の電磁接触器の防塵装置として、消弧室カバー（アークカバー）の消孤隔壁（縦壁間カバー）にあけられたガス抜きの穴の内側に、前記消孤隔壁と平行にかつこれと適宜の間隔を介して短冊状の異物侵入防止壁が設けられた電磁接触器の防塵装置において、異物侵入防止壁の消孤隔壁と対向する面の周囲にリブを土手状に巡らせ、該リブを一部を除いて前記消弧隔壁まで縦壁間カバー状に延ばし、ガス抜き穴を通して異物侵入防止壁上に落ちた異物がリブの内側に形成された凹部内に捕捉され、振動などが生じてもその周りから電磁接触器内に脱落しないようにしたものがある（例えば、特許文献１参照）。 As a conventional dust-proof device for an electromagnetic contactor, inside the gas vent hole formed in the arc-extinguishing partition wall (cover between the vertical walls) of the arc-extinguishing chamber cover (arc cover), In a dustproof device of an electromagnetic contactor provided with a strip-shaped foreign matter intrusion prevention wall through an appropriate interval, a rib is circulated around the surface of the foreign matter intrusion prevention wall facing the extinguishing partition wall, and the rib is Except for a part, it extends to the arc extinguishing partition wall in the shape of a cover between vertical walls, and foreign matter that has fallen on the foreign matter intrusion prevention wall through the vent hole is caught in the recess formed inside the rib, causing vibration etc. Also, there is one in which it does not fall into the electromagnetic contactor from its surroundings (see, for example, Patent Document 1).

特開平０５−００２９６２号公報JP 05-002962 A

しかしながら、上記従来の技術によれば、消弧隔壁とケースとの間の隙間、及び、消弧隔壁と固定接触子との間の隙間から、固定接触子の端子へ接続される電線の屑、電線被覆の屑、配線作業者の皮膚等の非導電性又は磁性を有する微小異物が電磁接触器内に侵入していた。そのため、微小異物が、接点の導通不良や電磁石の動作不良を引き起こすという問題があった。量産される電磁接触器においては、組立嵌合不良を避けるため、部品寸法をマイナス公差とせざるを得ず、前記の隙間を小さくするにも限界があった。 However, according to the above-mentioned conventional technology, from the gap between the arc extinguishing partition wall and the case, and from the gap between the arc extinguishing partition wall and the fixed contact, wire scraps connected to the terminals of the fixed contact, Non-conductive or magnetic minute foreign matter such as wire coating scraps and wiring workers' skin had entered the electromagnetic contactor. For this reason, there has been a problem that minute foreign matters cause poor conduction of contacts and malfunction of electromagnets. In mass-produced electromagnetic contactors, in order to avoid poor assembly fitting, the component dimensions have to be negative tolerances, and there is a limit to reducing the gap.

本発明は、上記に鑑みてなされたものであって、電磁接触器内への微小異物の侵入を防ぎ、接点の導通不良や電磁石の動作不良の発生を低減することができる電磁接触器を得ることを目的とする。 The present invention has been made in view of the above, and obtains an electromagnetic contactor that can prevent the entry of minute foreign matter into the electromagnetic contactor and reduce the occurrence of contact conduction failure and electromagnet operation failure. For the purpose.

上述した課題を解決し、目的を達成するために、本発明は、少なくとも２枚の前後方向の縦壁を有するハウジングと、前記縦壁間の上部に配置され前記ハウジングの前方を向く端子及び前記縦壁間の中央部寄りに配置される固定接点を有する上部固定接触子と、前記縦壁間の下部に配置され前記ハウジングの前方を向く端子及び前記縦壁間の中央部寄りに配置される固定接点を有する下部固定接触子と、前記縦壁間の中央部に配置され前記上下の固定接点に対向して配置される一対の可動接点を有する可動接触子と、前記可動接触子の前方の前記縦壁間を覆う前面カバーと、該前面カバーから突出し前記縦壁間に挿入されて前記上下の固定接触子のそれぞれの端子の中央側端部まで延在する一対の縦壁間カバーとを有し、前記固定接点及び可動接点を覆うアークカバーと、を備えた電磁接触器において、前記縦壁に前記縦壁間カバーの側部を嵌合する溝を設け、前記一対の縦壁間カバーの先端部を前記上下の固定接触子のそれぞれの端子の中央側端部の奥まで延在させ、前記縦壁間カバーの上面に、前記縦壁間カバーの側部及び先端部から該縦壁間カバーの中央部に向けて下り勾配となる傾斜面を設けたことを特徴とする。 In order to solve the above-mentioned problems and achieve the object, the present invention includes a housing having at least two longitudinal walls in the front-rear direction, a terminal disposed at an upper portion between the longitudinal walls, and facing the front of the housing, An upper fixed contact having a fixed contact disposed near the center between the vertical walls, a terminal disposed at the lower portion between the vertical walls and facing the front of the housing, and disposed near the center between the vertical walls. A lower fixed contact having a fixed contact; a movable contact having a pair of movable contacts disposed in a central portion between the vertical walls and opposed to the upper and lower fixed contacts; and a front of the movable contact A front cover that covers between the vertical walls, and a pair of vertical wall covers that protrude from the front cover and that are inserted between the vertical walls and extend to the center side ends of the terminals of the upper and lower stationary contacts. The fixed contact and possible An electromagnetic contactor comprising an arc cover for covering a contact, wherein a groove for fitting a side part of the cover between the vertical walls is provided in the vertical wall, and tip ends of the pair of vertical wall covers are fixed to the upper and lower sides. Extend to the back of the center side end of each terminal of the contactor, on the upper surface of the cover between the vertical walls, from the side and tip of the cover between the vertical walls toward the center of the cover between the vertical walls It is characterized in that an inclined surface that is a downward gradient is provided.

この発明によれば、微小異物が縦壁間カバーの上面に落下すると、その微小異物は傾斜面により縦壁間カバーの中央部に移動するので、縦壁間カバーの側部と縦壁の溝との間、及び、端子の中央側端部と縦壁間カバーの先端部との間に微小隙間があっても、電磁接触器の振動等によって、微小異物が微小隙間を通って電磁接触器内に侵入することはなく、接点の導通不良や電磁石の動作不良の発生を低減した電磁接触器が得られるという効果を奏する。 According to the present invention, when the minute foreign matter falls on the upper surface of the cover between the vertical walls, the minute foreign matter moves to the central portion of the cover between the vertical walls by the inclined surface. Even if there is a minute gap between the center end of the terminal and the tip of the cover between the vertical walls, a minute foreign matter passes through the minute gap due to vibration of the electromagnetic contactor, etc. There is an effect that an electromagnetic contactor can be obtained in which the occurrence of contact conduction failure and electromagnet operation failure is reduced.

以下に、本発明にかかる電磁接触器の実施の形態を図面に基づいて詳細に説明する。なお、この実施の形態によりこの発明が限定されるものではない。 Embodiments of an electromagnetic contactor according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

実施の形態１．
図１は、本発明にかかる電磁接触器の実施の形態１を示す接触子部分の斜視図であり、図２は、図１のＩ−Ｉ線に沿う断面図であり、図３は、図１のII−IIに沿う断面図である。 Embodiment 1 FIG.
FIG. 1 is a perspective view of a contact portion showing a first embodiment of an electromagnetic contactor according to the present invention, FIG. 2 is a cross-sectional view taken along the line I-I in FIG. 1, and FIG. It is sectional drawing which follows II-II of 1.

図１〜図３に示すように、電磁接触器１００のハウジング２は、樹脂成型により全体外形が直方体状に形成され、上下合計８枚の前後方向の縦壁としての仕切壁２ａと前後方向の縦壁としての２枚の外壁２ｇによって５相の接触子を設置する縦壁間空間２ｂに仕切られている。縦壁間空間２ｂの上部及び下部には、固定接触子１を保持する棚状の端子保持部２ｃが形成され、縦壁間空間２ｂの中央部には、後述のクロスバー８を、図１の左右方向へ摺動可能に支持する棚状のクロスバー支持部２ｄが形成されている。図１に示すように、ハウジング２の縦壁間空間２ｂの上下及び前方は開放されている。 As shown in FIGS. 1 to 3, the housing 2 of the electromagnetic contactor 100 has an overall outer shape formed in a rectangular parallelepiped shape by resin molding, and a total of eight vertical walls in the front-rear direction and partition walls 2 a as front-rear direction walls. Two outer walls 2g as vertical walls are partitioned into a space 2b between the vertical walls in which a five-phase contact is installed. A shelf-like terminal holding portion 2c that holds the stationary contact 1 is formed in the upper and lower portions of the space 2b between the vertical walls, and a cross bar 8 described later is provided in the center of the space 2b between the vertical walls. A shelf-like crossbar support portion 2d that is slidably supported in the left-right direction is formed. As shown in FIG. 1, the top and bottom and the front of the space 2 b between the vertical walls of the housing 2 are open.

固定接触子１は、金属板状の本体部１ａと、本体部１ａを９０°折り曲げてハウジング２の前方を向くように形成され、縦壁間空間２ｂの上部及び下部に配置されて図示しない端子ねじが装着されるねじ穴１ｃが設けられた端子１ｂと、縦壁間空間２ｂの中央部寄りに配置される固定接点１ｄとを有している。可動接触子５は、中央部が凸状に折り曲げられた金属片で形成され、縦壁間空間２ｂの中央部に配置され、上下両端に、上下の固定接点１ｄに対向して配置される一対の可動接点５ｄを有している。図２及び図３は、電磁接触器１００の上半分のみしか図示していないが、下半分は上半分と線対称となっている。 The fixed contact 1 is formed of a metal plate-like main body 1a and a terminal (not shown) which is formed to bend the main body 1a by 90 ° so as to face the front of the housing 2 and is arranged at the upper and lower portions of the space 2b between the vertical walls. It has a terminal 1b provided with a screw hole 1c in which a screw is mounted, and a fixed contact 1d arranged closer to the center of the space 2b between the vertical walls. The movable contact 5 is formed of a metal piece whose central portion is bent in a convex shape, and is disposed at the central portion of the space 2b between the vertical walls, and is disposed at both upper and lower ends so as to face the upper and lower fixed contacts 1d. The movable contact 5d is provided. 2 and 3 show only the upper half of the magnetic contactor 100, the lower half is line-symmetric with the upper half.

クロスバー８は、クロスバー支持部２ｄに嵌合されて支持され、図示しない電磁石の可動コアに接続され、可動コアが電磁石に吸引されると、図１及び図３の左方へ摺動するようになっている。クロスバー８には、図２及び図３に示すように、各縦壁間空間２ｂに対応する位置に上下方向の貫通角孔８ａが設けられ、可動接触子５が貫通角孔８ａに挿通され、可動接触子５の中央凸部が貫通角孔８ａ内に位置している。 The crossbar 8 is fitted and supported by the crossbar support portion 2d, is connected to a movable core of an electromagnet (not shown), and slides to the left in FIGS. 1 and 3 when the movable core is attracted by the electromagnet. It is like that. As shown in FIGS. 2 and 3, the cross bar 8 is provided with vertical through-holes 8a at positions corresponding to the spaces 2b between the vertical walls, and the movable contact 5 is inserted into the through-square holes 8a. The central convex portion of the movable contact 5 is located in the through-angle hole 8a.

接触ばね７は、図３に示すように貫通角孔８ａ内に設置されて、可動接触子５を図３の左方向へ押圧している。接触ばね７は、クロスバー８が図１及び図３の左方向へ摺動して可動接点５ｄが固定接点１ｄに当接した後、クロスバー８の移動によって圧縮され圧縮反力により可動接点５ｄを固定接点１ｄに押圧し、接触圧力を付与して接点間を閉路する。電磁石への給電が断たれると、図示しない引離しばねによってクロスバー８が右方向へ押し戻され、可動接点５ｄが固定接点１ｄから引離されて接点間が開路される。 As shown in FIG. 3, the contact spring 7 is installed in the through-angle hole 8a and presses the movable contact 5 in the left direction of FIG. The contact spring 7 is compressed by the movement of the cross bar 8 after the cross bar 8 slides leftward in FIGS. 1 and 3 and the movable contact 5d contacts the fixed contact 1d, and the movable contact 5d by the compression reaction force. Is pressed against the fixed contact 1d to apply contact pressure and close the contact. When the power supply to the electromagnet is cut off, the cross bar 8 is pushed back to the right by a release spring (not shown), the movable contact 5d is pulled away from the fixed contact 1d, and the contact is opened.

接点開閉時に発生するアークの外部への放出を防ぐための樹脂成型されたアークカバー３は、ハウジング２の中央部の可動接触子５の前方の縦壁間空間２ｂを覆う矩形板状の前面カバー３ａと、ハウジング２の外壁２ｇに係合する係止部３ｂと、前面カバー３ａの上下端部から略直角に突出するように形成され、各縦壁間空間２ｂに挿入されて端子１ｂの中央側端部１ｅの奥まで延在する縦壁間カバー３ｃとを有している。前面カバー３ａと縦壁間カバー３ｃとで縦壁間空間２ｂ内の中央部の固定接点及び可動接点が配置された接点開閉空間２ｆを覆っている。縦壁２ａに設けられた前後方向の溝２ｅに、縦壁間カバー３ｃの側部３ｄが嵌合され、縦壁間カバー３ｃの先端部３ｅは、端子１ｂの中央側端部１ｅに接触するとともに中央側端部１ｅの奥まで延在している。 A resin-molded arc cover 3 for preventing discharge of the arc generated when the contacts are opened and closed is a rectangular plate-shaped front cover that covers the space 2b between the vertical walls in front of the movable contact 5 at the center of the housing 2. 3a, a locking portion 3b that engages with the outer wall 2g of the housing 2, and a front cover 3a that is formed so as to protrude substantially at right angles from the upper and lower ends of the front cover 3a, and is inserted into each vertical inter-wall space 2b and the center of the terminal 1b It has the cover 3c between the vertical walls extended to the back of the side edge part 1e. The front cover 3a and the inter-vertical wall cover 3c cover the contact opening / closing space 2f in which the fixed contact and the movable contact at the center in the inter-vertical wall space 2b are arranged. The side portion 3d of the cover 3c between the vertical walls is fitted into the longitudinal groove 2e provided on the vertical wall 2a, and the tip portion 3e of the cover 3c between the vertical walls contacts the center side end portion 1e of the terminal 1b. At the same time, it extends to the back of the central end 1e.

縦壁間カバー３ｃの上面（外面）３ｆには、側部３ｄ及び先端部３ｅから中央部に向けて下り勾配となる傾斜面３ｇ、３ｇ、３ｇが設けられ、中央部には、一段低い傾斜溝３ｈが形成され、傾斜溝３ｈは、前面カバー３ａに向かって下り勾配となっている。 The upper surface (outer surface) 3f of the cover 3c between the vertical walls is provided with inclined surfaces 3g, 3g, 3g that are inclined downward from the side portion 3d and the tip portion 3e toward the central portion, and the central portion is inclined one step lower. A groove 3h is formed, and the inclined groove 3h is inclined downward toward the front cover 3a.

実施の形態１の電磁接触器１００によれば、微小異物がアークカバー３の縦壁間カバー３ｃの上面３ｆ上に落下すると、その微小異物は、傾斜面３ｇ、３ｇ、３ｇにより縦壁間カバー３ｃの中央部に移動し、傾斜溝３ｈに落下し、傾斜溝３ｈ内を移動して傾斜溝３ｈの前面カバー３ａ側に集められる。従って、縦壁間カバー３ｃの側部３ｄと縦壁２ａの溝２ｅとの間、及び、端子１ｂの中央側端部１ｅと縦壁間カバー３ｃの先端部３ｅとの間に微小隙間があっても、電磁接触器１００の振動等によって、微小異物が微小隙間を通って電磁接触器内に入り込むことはなく、接点１ｄ、５ｄの導通不良や電磁石の動作不良の発生を低減することができる電磁接触器１００が得られるという効果を奏する。 According to the electromagnetic contactor 100 of the first embodiment, when a minute foreign matter falls on the upper surface 3f of the cover 3c between the vertical walls of the arc cover 3, the minute foreign matter is covered by the inclined surfaces 3g, 3g, and 3g. It moves to the center part of 3c, falls to the inclined groove 3h, moves in the inclined groove 3h, and is collected on the front cover 3a side of the inclined groove 3h. Accordingly, there is a minute gap between the side 3d of the cover 3c between the vertical walls and the groove 2e of the vertical wall 2a, and between the center side end 1e of the terminal 1b and the tip 3e of the cover 3c between the vertical walls. However, due to the vibration of the electromagnetic contactor 100 or the like, minute foreign matter does not enter the electromagnetic contactor through the minute gap, and the occurrence of poor conduction of the contacts 1d and 5d and malfunction of the electromagnet can be reduced. There exists an effect that the electromagnetic contactor 100 is obtained.

実施の形態２．
図４は、本発明にかかる電磁接触器の実施の形態２を示す接触子部分の断面図である。図４において、図１〜図３に示すものと同等のものには、同一の符号を付して詳細な説明を省略する。 Embodiment 2. FIG.
FIG. 4 is a cross-sectional view of a contact portion showing a second embodiment of the electromagnetic contactor according to the present invention. 4, the same components as those shown in FIGS. 1 to 3 are denoted by the same reference numerals, and detailed description thereof is omitted.

実施の形態２の電磁接触器２００が実施の形態１の電磁接触器１００と異なるところは、アークカバー３の縦壁間カバー３ｃの傾斜溝３ｈの前面カバー３ａ側に落し穴３ｉを設けていることである。 The electromagnetic contactor 200 of the second embodiment is different from the electromagnetic contactor 100 of the first embodiment in that a drop hole 3i is provided on the front cover 3a side of the inclined groove 3h of the cover 3c between the vertical walls of the arc cover 3. It is.

実施の形態２の電磁接触器２００によれば、微小異物がアークカバー３の縦壁間カバー３ｃの上方から縦壁間カバー３ｃの外面３ｆ上に落下すると、その微小異物は、傾斜面３ｇ、３ｇ、３ｇにより縦壁間カバー３ｃの中央部に移動し、傾斜溝３ｈに落下し、傾斜溝３ｈ内を移動して落し穴３ｉに落ちて捕獲される。従って、縦壁間カバー３ｃの側部３ｄと縦壁２ａの溝２ｅとの間、及び、端子１ｂの中央側端部１ｅと縦壁間カバー３ｃの先端部３ｅとの間に微小隙間があっても、電磁接触器２００の振動等によって、微小異物が微小隙間を通って電磁接触器内に入り込むことはなく、確実に、接点１ｄ、５ｄの導通不良や電磁石の動作不良の発生を低減することができる電磁接触器２００が得られるという効果を奏する。 According to the electromagnetic contactor 200 of the second embodiment, when the minute foreign matter falls from above the cover 3c between the vertical walls of the arc cover 3 onto the outer surface 3f of the cover 3c between the vertical walls, the minute foreign matter becomes the inclined surface 3g, It moves to the center part of the cover 3c between vertical walls by 3g, 3g, falls to the inclined groove 3h, moves in the inclined groove 3h, falls into the dropping hole 3i, and is captured. Accordingly, there is a minute gap between the side 3d of the cover 3c between the vertical walls and the groove 2e of the vertical wall 2a, and between the center side end 1e of the terminal 1b and the tip 3e of the cover 3c between the vertical walls. However, due to vibration of the electromagnetic contactor 200 or the like, minute foreign matter does not enter the electromagnetic contactor through the minute gap, and the occurrence of poor conduction of the contacts 1d and 5d and malfunction of the electromagnet is surely reduced. The effect that the electromagnetic contactor 200 which can be obtained is obtained.

実施の形態３．
図５は、本発明にかかる電磁接触器の実施の形態３を示す接触子部分の斜視図であり、図６は、図５のＩ−Ｉ線に沿う断面図である。図５及び図６において、図１〜図４に示すものと同等のものには、同一の符号を付して詳細な説明を省略する。 Embodiment 3 FIG.
FIG. 5 is a perspective view of a contact portion showing Embodiment 3 of the electromagnetic contactor according to the present invention, and FIG. 6 is a cross-sectional view taken along the line II of FIG. 5 and 6, the same components as those shown in FIGS. 1 to 4 are denoted by the same reference numerals, and detailed description thereof is omitted.

実施の形態３の電磁接触器３００が実施の形態２の電磁接触器２００と異なるところは、アークカバー３の縦壁間カバー３ｃの落し穴３ｉの前方の前面カバー３ａに開口３ｊを設けていることである。 The electromagnetic contactor 300 of the third embodiment is different from the electromagnetic contactor 200 of the second embodiment in that an opening 3j is provided in the front cover 3a in front of the drop hole 3i of the cover 3c between the vertical walls of the arc cover 3. It is.

実施の形態３の電磁接触器３００によれば、微小異物がアークカバー３の縦壁間カバー３ｃの上方から縦壁間カバー３ｃの外面３ｆ上に落下すると、その微小異物は、傾斜面３ｇ、３ｇ、３ｇにより縦壁間カバー３ｃの中央部に移動し、傾斜溝３ｈに落下し、傾斜溝３ｈ内を移動して落し穴３ｉに落ち、開口３ｊから外部に排出される。従って、縦壁間カバー３ｃの側部３ｄと縦壁２ａの溝２ｅとの間、及び、端子１ｂの中央側端部１ｅと縦壁間カバー３ｃの先端部３ｅとの間に微小隙間があっても、電磁接触器３００の振動等によって、微小異物が微小隙間を通って電磁接触器内に入り込むことはなく、より確実に、接点１ｄ、５ｄの導通不良や電磁石の動作不良の発生を低減することができる電磁接触器３００が得られるという効果を奏する。 According to the electromagnetic contactor 300 of the third embodiment, when the minute foreign matter falls from above the vertical wall cover 3c of the arc cover 3 onto the outer surface 3f of the vertical wall cover 3c, the minute foreign matter is inclined to the inclined surface 3g, 3g and 3g, it moves to the center part of the cover 3c between vertical walls, falls to the inclined groove 3h, moves in the inclined groove 3h, falls into the dropping hole 3i, and is discharged outside through the opening 3j. Accordingly, there is a minute gap between the side 3d of the cover 3c between the vertical walls and the groove 2e of the vertical wall 2a, and between the center side end 1e of the terminal 1b and the tip 3e of the cover 3c between the vertical walls. However, due to vibration of the electromagnetic contactor 300 or the like, minute foreign matter does not enter the electromagnetic contactor through the minute gap, and more reliably reduce the occurrence of contact failure of the contacts 1d and 5d and malfunction of the electromagnet. The electromagnetic contactor 300 that can be obtained is obtained.

実施の形態４．
図７は、本発明にかかる電磁接触器の実施の形態４を示す接触子部分の断面図である。図７において、図１〜図６に示すものと同等のものには、同一の符号を付して詳細な説明を省略する。 Embodiment 4 FIG.
FIG. 7 is a cross-sectional view of a contact portion showing Embodiment 4 of the electromagnetic contactor according to the present invention. 7, the same components as those shown in FIGS. 1 to 6 are denoted by the same reference numerals, and detailed description thereof is omitted.

実施の形態４の電磁接触器４００が実施の形態３の電磁接触器３００と異なるところは、アークカバー３の前面カバー３ａの開口３ｊを粘着シール９で塞いでいることである。 The electromagnetic contactor 400 of the fourth embodiment is different from the electromagnetic contactor 300 of the third embodiment in that the opening 3j of the front cover 3a of the arc cover 3 is closed with the adhesive seal 9.

実施の形態４の電磁接触器４００によれば、微小異物がアークカバー３の縦壁間カバー３ｃの上方から縦壁間カバー３ｃの外面３ｆ上に落下すると、その微小異物は、傾斜面３ｇ、３ｇ、３ｇにより縦壁間カバー３ｃの中央部に移動し、傾斜溝３ｈに落下し、傾斜溝３ｈ内を移動して落し穴３ｉに落ち、開口３ｊの粘着シール９に捕獲される。従って、縦壁間カバー３ｃの側部３ｄと縦壁２ａの溝２ｅとの間、及び、端子１ｂの中央側端部１ｅと縦壁間カバー３ｃの先端部３ｅとの間に微小隙間があっても、電磁接触器４００の振動等によって、微小異物が微小隙間を通って電磁接触器内に入り込むことはなく、より確実に、接点１ｄ、５ｄの導通不良や電磁石の動作不良の発生を低減することができる電磁接触器４００が得られるという効果を奏する。 According to the electromagnetic contactor 400 of the fourth embodiment, when a minute foreign matter falls from above the cover 3c between the vertical walls of the arc cover 3 onto the outer surface 3f of the cover 3c between the vertical walls, the minute foreign matter becomes the inclined surface 3g, 3g and 3g move to the center of the cover 3c between the vertical walls, drop into the inclined groove 3h, move through the inclined groove 3h, drop into the drop hole 3i, and are captured by the adhesive seal 9 in the opening 3j. Accordingly, there is a minute gap between the side 3d of the cover 3c between the vertical walls and the groove 2e of the vertical wall 2a, and between the center side end 1e of the terminal 1b and the tip 3e of the cover 3c between the vertical walls. However, due to the vibration of the electromagnetic contactor 400, minute foreign matter does not enter the electromagnetic contactor through the minute gap, and more reliably reduce the occurrence of contact failure of the contacts 1d and 5d and malfunction of the electromagnet. The electromagnetic contactor 400 that can be obtained is obtained.

実施の形態５．
図８は、本発明にかかる電磁接触器の実施の形態５を示す接触子部分の断面図であり、図９は、図８のII−II線に沿う断面図である。図８及び図９において、図１〜図３に示すものと同等のものには、同一の符号を付して詳細な説明を省略する。 Embodiment 5 FIG.
8 is a cross-sectional view of a contact portion showing Embodiment 5 of the electromagnetic contactor according to the present invention, and FIG. 9 is a cross-sectional view taken along the line II-II in FIG. 8 and 9, the same components as those shown in FIGS. 1 to 3 are denoted by the same reference numerals, and detailed description thereof is omitted.

実施の形態５の電磁接触器５００が実施の形態１の電磁接触器１００と異なるところは、アークカバー３の縦壁間カバー３ｃの上面（外面）３ｆに、矩形の浅い凹部３ｋが設けられ、凹部３ｋの側方縁部３ｍ、３ｍが、縦壁２ａに設けられた前後方向の溝２ｅ、２ｅ内に入り込み、前方縁部３ｎが端子１ｂの中央側端部１ｅの奥へ入り込んでいることである。 The electromagnetic contactor 500 of the fifth embodiment is different from the electromagnetic contactor 100 of the first embodiment in that a rectangular shallow recess 3k is provided on the upper surface (outer surface) 3f of the inter-vertical wall cover 3c of the arc cover 3, The side edges 3m and 3m of the recess 3k enter the grooves 2e and 2e in the front-rear direction provided on the vertical wall 2a, and the front edge 3n enters the back of the center side end 1e of the terminal 1b. It is.

実施の形態５の電磁接触器５００によれば、微小異物がアークカバー３の縦壁間カバー３ｃの上方から縦壁間カバー３ｃの外面３ｆ上に落下するとき、側方縁部３ｍ、３ｍ及び前方縁部３ｎ上に落下することはなく、凹部３ｋ内に落下する。従って、側方縁部３ｍ、３ｍと縦壁２ａの溝２ｅとの間、及び、端子１ｂの中央側端部１ｅと前方縁部３ｎとの間に微小隙間があっても、電磁接触器５００の振動等によって、微小異物が微小隙間を通って電磁接触器内に入り込むことはなく、接点１ｄ、５ｄの導通不良や電磁石の動作不良の発生を低減することができる電磁接触器５００が得られるという効果を奏する。 According to the electromagnetic contactor 500 of the fifth embodiment, when the minute foreign matter falls from the upper side of the vertical wall cover 3c of the arc cover 3 onto the outer surface 3f of the vertical wall cover 3c, the side edge portions 3m, 3m and It does not fall on the front edge 3n but falls into the recess 3k. Therefore, even if there is a minute gap between the side edges 3m, 3m and the groove 2e of the vertical wall 2a, and between the center side end 1e of the terminal 1b and the front edge 3n, the electromagnetic contactor 500 is provided. The electromagnetic contactor 500 can be obtained in which the minute foreign matter does not enter the electromagnetic contactor through the minute gap due to the vibration of the magnetic field, and the occurrence of poor conduction of the contacts 1d and 5d and malfunction of the electromagnet can be reduced. There is an effect.

なお、実施の形態１において、図示はしないが、傾斜溝３ｈの前方の前面カバー３ａに傾斜溝３ｈと連通する開口を設けてもよい。また、実施の形態５において、図示はしないが、凹部３ｋの前方の前面カバー３ａに凹部３ｋと連通する開口を設けてもよい。さらに、これらの開口を粘着シール９で塞いでもよい。また、電磁接触器１００〜５００は、ハウジング２が少なくとも２枚の縦壁（外壁２ｇ）を有する単相の電磁接触器であってもよい。 In the first embodiment, although not illustrated, an opening communicating with the inclined groove 3h may be provided in the front cover 3a in front of the inclined groove 3h. In the fifth embodiment, though not shown, an opening communicating with the recess 3k may be provided in the front cover 3a in front of the recess 3k. Further, these openings may be closed with an adhesive seal 9. The electromagnetic contactors 100 to 500 may be single-phase electromagnetic contactors in which the housing 2 has at least two vertical walls (outer wall 2g).

以上のように、本発明にかかる電磁接触器は、作業環境が悪い現場で組立られる制御機器等に使用される電磁接触器として有用であり、また、粉塵等が多い環境下で稼働する制御機器等に使用される電磁接触器として適している。 As described above, the electromagnetic contactor according to the present invention is useful as an electromagnetic contactor used in a control device or the like that is assembled in a work environment where the working environment is bad, and is a control device that operates in an environment with a lot of dust or the like. It is suitable as an electromagnetic contactor used for etc.

本発明にかかる電磁接触器の実施の形態１を示す接触子部分の斜視図である。It is a perspective view of the contact part which shows Embodiment 1 of the electromagnetic contactor concerning this invention. 図１のＩ−Ｉ線に沿う断面図である。It is sectional drawing which follows the II line | wire of FIG. 図１のII−II線に沿う断面図である。It is sectional drawing which follows the II-II line of FIG. 本発明にかかる電磁接触器の実施の形態２を示す接触子部分の断面図である。It is sectional drawing of the contact part part which shows Embodiment 2 of the electromagnetic contactor concerning this invention. 本発明にかかる電磁接触器の実施の形態３を示す接触子部分の斜視図である。It is a perspective view of the contact part which shows Embodiment 3 of the electromagnetic contactor concerning this invention. 図５のＩ−Ｉ線に沿う断面図である。It is sectional drawing which follows the II line | wire of FIG. 本発明にかかる電磁接触器の実施の形態４を示す接触子部分の断面図である。It is sectional drawing of the contact part part which shows Embodiment 4 of the electromagnetic contactor concerning this invention. 本発明にかかる電磁接触器の実施の形態５を示す接触子部分の断面図である。It is sectional drawing of the contact part part which shows Embodiment 5 of the electromagnetic contactor concerning this invention. 図８のII−II線に沿う断面図である。It is sectional drawing which follows the II-II line of FIG.

符号の説明Explanation of symbols

１固定接触子
１ａ本体部
１ｂ端子
１ｄ固定接点
１ｅ中央側端部
２ハウジング
２ａ仕切壁（縦壁）
２ｂ縦壁間空間
２ｅ溝
２ｆ接点開閉空間
２ｇ外壁（縦壁）
３アークカバー
３ａ前面カバー
３ｂ係止部
３ｃ縦壁間カバー
３ｄ側部
３ｅ先端部
３ｆ上面
３ｇ傾斜面
３ｈ傾斜溝
３ｉ落し穴
３ｊ開口
３ｋ凹部
３ｍ側方縁部
３ｎ先端縁部
５可動接触子
５ｄ可動接点
７接触ばね
８クロスバー
９粘着シール DESCRIPTION OF SYMBOLS 1 Fixed contact 1a Main part 1b Terminal 1d Fixed contact 1e Center side edge 2 Housing 2a Partition wall (vertical wall)
2b Space between vertical walls 2e Groove 2f Contact opening / closing space 2g Outer wall (vertical wall)
3 Arc cover 3a Front cover 3b Locking portion 3c Cover between vertical walls 3d Side portion 3e Tip portion 3f Top surface 3g Inclined surface 3h Inclined groove 3i Drop hole 3j Opening 3k Recessed portion 3m Side edge 3n Tip edge 5 Movable contact 5d Contact 7 Contact spring 8 Cross bar 9 Adhesive seal

Claims

少なくとも２枚の前後方向の縦壁を有するハウジングと、
前記縦壁間の上部に配置され前記ハウジングの前方を向く端子及び前記縦壁間の中央部寄りに配置される固定接点を有する上部固定接触子と、
前記縦壁間の下部に配置され前記ハウジングの前方を向く端子及び前記縦壁間の中央部寄りに配置される固定接点を有する下部固定接触子と、
前記縦壁間の中央部に配置され前記上下の固定接点に対向して配置される一対の可動接点を有する可動接触子と、
前記可動接触子の前方の前記縦壁間を覆う前面カバーと、該前面カバーから突出し前記縦壁間に挿入されて前記上下の固定接触子のそれぞれの端子の中央側端部まで延在する一対の縦壁間カバーとを有し、前記固定接点及び可動接点を覆うアークカバーと、
を備えた電磁接触器において、
前記縦壁に前記縦壁間カバーの側部を嵌合する溝を設け、前記一対の縦壁間カバーの先端部を前記上下の固定接触子のそれぞれの端子の中央側端部の奥まで延在させ、前記縦壁間カバーの上面に、前記縦壁間カバーの側部及び先端部から該縦壁間カバーの中央部に向けて下り勾配となる傾斜面を設けたことを特徴とする電磁接触器。 A housing having at least two longitudinal longitudinal walls;
An upper fixed contact having a terminal disposed at an upper portion between the vertical walls and facing the front of the housing and a fixed contact disposed near a central portion between the vertical walls;
A lower fixed contact having a terminal disposed at a lower portion between the vertical walls and facing the front of the housing and a fixed contact disposed near a central portion between the vertical walls;
A movable contact having a pair of movable contacts disposed in a central portion between the vertical walls and opposed to the upper and lower fixed contacts;
A front cover that covers between the vertical walls in front of the movable contact, and a pair that protrudes from the front cover and that is inserted between the vertical walls and extends to the center end of each terminal of the upper and lower fixed contacts. And an arc cover that covers the fixed contact and the movable contact,
In an electromagnetic contactor with
A groove for fitting the side portion of the cover between the vertical walls is provided in the vertical wall, and the front end portions of the pair of vertical wall covers extend to the back of the center side end portions of the respective terminals of the upper and lower stationary contacts. And an inclined surface is provided on the upper surface of the cover between the vertical walls, which is inclined downward from the side portion and the tip portion of the cover between the vertical walls toward the center portion of the cover between the vertical walls. Contactor.

前記縦壁間カバーの上面の中央部には傾斜溝が形成され、該傾斜溝は前記前面カバーに向かって下り勾配となっていることを特徴とする請求項１に記載の電磁接触器。 2. The electromagnetic contactor according to claim 1, wherein an inclined groove is formed in a center portion of the upper surface of the cover between the vertical walls, and the inclined groove is inclined downward toward the front cover.

前記傾斜溝の前方の前面カバーに、該傾斜溝と連通する開口を設け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 an opening communicating with the inclined groove is provided in a front cover in front of the inclined groove.

前記傾斜溝の前面カバー側に、落し穴を設け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 a drop hole is provided on the front cover side of the inclined groove.

前記落し穴の前方の前面カバーに、該落し穴と連通する開口を設けたことを特徴とする請求項４に記載の電磁接触器。 The electromagnetic contactor according to claim 4, wherein an opening communicating with the drop hole is provided in a front cover in front of the drop hole.

少なくとも２枚の前後方向の縦壁を有するハウジングと、
前記縦壁間の上部に配置され前記ハウジングの前方を向く端子及び前記縦壁間の中央部寄りに配置される固定接点を有する上部固定接触子と、
前記縦壁間の下部に配置され前記ハウジングの前方を向く端子及び前記縦壁間の中央部寄りに配置される固定接点を有する下部固定接触子と、
前記縦壁間の中央部に配置され前記上下の固定接点に対向して配置される一対の可動接点を有する可動接触子と、
前記可動接触子の前方の前記縦壁間を覆う前面カバーと、該前面カバーから突出し前記縦壁間に挿入されて前記上下の固定接触子のそれぞれの端子の中央側端部まで延在する一対の縦壁間カバーとを有し、前記固定接点及び可動接点を覆うアークカバーと、
を備えた電磁接触器において、
前記縦壁に前記縦壁間カバーの側部を嵌合する溝を設け、前記一対の縦壁間カバーの先端部を前記上下の固定接触子のそれぞれの端子の中央側端部の奥まで延在させ、前記縦壁間カバーの上面には、矩形の凹部を設け、該凹部の側方縁部が前記溝内に入り込み、先端縁部が前記端子の中央側端部の奥へ入り込んでいることを特徴とする電磁接触器。 A housing having at least two longitudinal longitudinal walls;
An upper fixed contact having a terminal disposed at an upper portion between the vertical walls and facing the front of the housing and a fixed contact disposed near a central portion between the vertical walls;
A lower fixed contact having a terminal disposed at a lower portion between the vertical walls and facing the front of the housing and a fixed contact disposed near a central portion between the vertical walls;
A movable contact having a pair of movable contacts disposed in a central portion between the vertical walls and opposed to the upper and lower fixed contacts;
A front cover that covers between the vertical walls in front of the movable contact, and a pair that protrudes from the front cover and is inserted between the vertical walls and extends to the center side end of each terminal of the upper and lower stationary contacts. And an arc cover that covers the fixed contact and the movable contact,
In an electromagnetic contactor with
A groove for fitting the side portion of the cover between the vertical walls is provided in the vertical wall, and the front end portions of the pair of vertical wall covers extend to the back of the center side end portions of the respective terminals of the upper and lower stationary contacts. A rectangular recess is provided on the upper surface of the cover between the vertical walls, the side edge of the recess enters the groove, and the tip edge enters the back of the center side end of the terminal. An electromagnetic contactor characterized by that.

前記凹部の前方の前面カバーに、該凹部に連通する開口を設けたことを特徴とする請求項６に記載の電磁接触器。 The electromagnetic contactor according to claim 6, wherein an opening communicating with the concave portion is provided in a front cover in front of the concave portion.

前記開口を粘着シールで塞いだことを特徴とする請求項３、５又は７に記載の電磁接触器。 The electromagnetic contactor according to claim 3, 5 or 7, wherein the opening is closed with an adhesive seal.