JPS6353826A - Contact switch for ac - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 ［技術分野］ 本発明は、リレー、コンタクタ等接点の開閉動作をせし
めるための電磁石装置を備えたものであって、特に交流
負荷を開閉制御する交流用接点開閉装置に関する。[Detailed Description of the Invention] [Technical Field] The present invention is equipped with an electromagnetic device for opening and closing contacts such as relays and contactors, and particularly relates to an AC contact switching device for controlling switching of an AC load. .

［背景技術］ この種の接点開閉装置の接点は、銀糸接点を用いるもの
が一般的である。かかる接点は、ランプ負荷やモータ負
荷の開閉時、その突入電流により、あるいは抵抗負荷で
あっても多数回開閉した場合、接点表面の状態変化等に
より、溶着が発生する。しかしながら、このような溶着
は通常それほど強固なものでな（、外部かられずかな力
や振動を加えれば引き外しが可能な、所謂軽溶着と称さ
れる程度のものが殆どである。[Background Art] The contacts of this type of contact opening/closing device generally use silver thread contacts. Welding occurs in such contacts due to changes in the state of the contact surfaces when a lamp load or a motor load is opened and closed due to inrush current, or even when a resistive load is opened and closed many times. However, such welds are usually not very strong (most of them are so-called light welds, which can be removed by applying a small amount of force or vibration from the outside).

［発明の目的］ 本発明は、上記事由に鑑みてなしたものであって、その
目的とするところは、軽溶着状態となった両接点を引き
外し、もって接点の長寿命化が図れる交流用接点開閉装
置の提供にある。[Object of the Invention] The present invention has been made in view of the above-mentioned reasons, and its purpose is to provide an alternating current contact that can detach both lightly welded contacts, thereby extending the life of the contacts. The purpose is to provide a contact opening/closing device.

［発明の開示］ 本発明の交流用接点開閉装置は、固定接点を設けた固定
接触子と可動接点を設けた可動接触子とを有し、可動接
触子が電磁石装置の励磁コイルを制御することにより変
位するアマチャに応動して両接点を開閉動作せしめる接
点開閉装置であって、電磁石装置により両接点と同様に
開閉動作せしめられる補助固定接点及び補助可動接点を
該両接点と直列に設けるとともに、両補助接点に並列接
続されるコイルを電磁石装置における励磁コイルと同様
に作用し得る位置に巻回し、両接点及び両補助接点に交
流電源と負荷を直列に接続してなるものである。[Disclosure of the Invention] The AC contact switching device of the present invention has a fixed contact provided with a fixed contact and a movable contact provided with a movable contact, and the movable contact controls an excitation coil of an electromagnet device. A contact opening/closing device that opens and closes both contacts in response to an armature displaced by an armature, wherein an auxiliary fixed contact and an auxiliary movable contact that are opened and closed in the same manner as both contacts by an electromagnetic device are provided in series with the two contacts, A coil connected in parallel to both auxiliary contacts is wound in a position where it can function in the same way as an excitation coil in an electromagnet device, and an AC power source and a load are connected in series to both contacts and both auxiliary contacts.

本発明によれば、両接点間に軽溶着が生じた場合、コイ
ルに交流電流が流れ続けるので電磁石装置には脈動する
吸引力が発生し、従ってこの吸引力がアマチャや可動接
触子を介して両接点に伝わり、軽溶着を引き外すことが
できる。According to the present invention, when light welding occurs between both contacts, alternating current continues to flow through the coil, so a pulsating attraction force is generated in the electromagnetic device, and this attraction force is transmitted through the armature and the movable contact. It is transmitted to both contacts and can remove light welds.

（実施例） 以下、リレーに通用した場合の本発明の一実施例を、第
１図乃至第４図に基づいて説明する。(Embodiment) An embodiment of the present invention applicable to a relay will be described below with reference to FIGS. 1 to 4.

１は絶縁物製の器台で、図外ケースとともにハウジング
を形成する。このハウジング内に主要構成部材が固定装
着され、器台１から接点端子２゜３と電磁石装置の励磁
コイル端子４．５とが置設される。Reference numeral 1 denotes a table made of an insulating material, which forms a housing together with a case (not shown). The main components are fixedly mounted in this housing, and the contact terminals 2.3 and the excitation coil terminals 4.5 of the electromagnetic device are installed from the device stand 1.

６は固定接点７を先端に設けた固定接触子で、基端は器
台１に固着されるとともに接点端子２となる。８は固定
接点７に接離する可動接点９を先端に設けた導電製板ば
ね材からなる可動接触子で、基端は後述の電磁石装置に
保持固定される。A fixed contact 6 has a fixed contact 7 at its tip, and its base end is fixed to the device stand 1 and serves as a contact terminal 2. Reference numeral 8 denotes a movable contact made of a conductive plate spring material, which has a movable contact 9 at its tip that contacts and separates from the fixed contact 7, and its base end is held and fixed to an electromagnet device to be described later.

３６は補助固定接点３７を先端に設けた補助固定接触子
で、基端は器台１に固着されるとともに接点端子３とな
る。３８は補助固定接点３７に接離する補助可動接点３
９を先端に設けた導電製板ばね材からなる補助可動接触
子で、基端は後述の電磁石装置に保持固定される。Reference numeral 36 denotes an auxiliary stationary contact having an auxiliary stationary contact 37 at its tip, whose base end is fixed to the device stand 1 and serves as the contact terminal 3. 38 is an auxiliary movable contact 3 that comes into contact with and separates from the auxiliary fixed contact 37
This is an auxiliary movable contact made of a conductive plate spring material with a tip 9 provided, and the base end is held and fixed to an electromagnet device to be described later.

電磁石装置１０は、器台１にねし固定されたＬ字状のヨ
ーク１１．軸心がヨーク１１に平行となるよう器台１に
ねし固定された２個のＬ字状支持板１２．１２間に固着
される鉄心１３．鉄心１３の外周にコイル枠１４を介し
て巻回された励磁コイル１５．先端が鉄心１３の一端面
１３ａに吸引されるよう位置して基端がヨーク１１の端
部に揺動可能に支持されたアマチャ１６．先端が鉄心１
３の他端面１３ｂに吸引されるよう位置して基端がヨー
ク１１の端部に揺動可能に支持された補助アマチャ１７
１両アマチャ１６．１７を吸引状態から釈放状態に向け
てばね付勢するため両アマチャ１６．１７の基端間に引
張懸架された復帰ばね１８とよりなる。上記可動接触子
８はアマチャ１６に、補助可動接触子３８は補助アマチ
ャ１７にそれぞれ固定され、従って両可動接触子８．３
８は、電磁石装置１０の励磁コイル１５を制御すること
により変位する両アマチャ１６．１７に応動して両接点
７．９及び両補助接点３７．３９を同様（一方が開成な
ら他方も開成）に開閉動作せしめるのである。さらに、
両可動接触子８．３８間は編組線１９にて接続され、従
って両接点７，９と両補助接点３７．３９は、直列に設
けられるのである。The electromagnet device 10 includes an L-shaped yoke 11 screwed onto the device stand 1. Two L-shaped support plates 12 are screwed onto the instrument base 1 so that their axes are parallel to the yoke 11. An iron core 13 is fixed between the two L-shaped support plates 12. An excitation coil 15 is wound around the outer periphery of the iron core 13 via a coil frame 14. An armature 16 whose distal end is positioned so as to be attracted to one end surface 13a of the iron core 13 and whose base end is swingably supported by the end of the yoke 11. The tip is iron core 1
An auxiliary armature 17 is positioned so as to be attracted to the other end surface 13b of the yoke 13, and its base end is swingably supported by the end of the yoke 11.
A return spring 18 is tensioned between the proximal ends of both armatures 16.17 to bias the armatures 16.17 from the suction state to the release state. The movable contact 8 is fixed to the armature 16, and the auxiliary movable contact 38 is fixed to the auxiliary armature 17, so that both movable contacts 8.3
8 similarly opens both contacts 7.9 and both auxiliary contacts 37.39 (if one is opened, the other is also opened) in response to both armatures 16.17 displaced by controlling the excitation coil 15 of the electromagnet device 10. It allows the opening and closing operations. moreover,
Both movable contacts 8.38 are connected by a braided wire 19, and therefore both contacts 7, 9 and both auxiliary contacts 37.39 are provided in series.

２０は両補助接点３７．３９に並列接続、換言すれば両
接点７．９に直列接続されるコイルで、電磁石装置１０
おける励磁コイル１５と同様（両アマチャ１６．１７の
吸引釈放動作に対し）に作用し得る位置、例えば励磁コ
イル１５の外周に巻回しである。このコイル２０は、励
磁コイル１５より線径を太くしかつ巻数を少なくする。20 is a coil connected in parallel to both auxiliary contacts 37.39, in other words, connected in series to both contacts 7.9;
It is located at a position where it can act in the same manner as the excitation coil 15 (for the attracting and releasing operation of both armatures 16, 17), for example, by winding it around the outer circumference of the excitation coil 15. This coil 20 has a larger wire diameter and a smaller number of turns than the excitation coil 15.

その設計にあたっては、負荷側の交流電源に対してその
電圧降下をなるべく小さくし、しかも励磁コイル１５の
吸引力より小さい吸引力が作用するようにして軽溶着を
引き外し得る脈動吸引力が生じるようにする。In its design, the voltage drop with respect to the AC power supply on the load side is made as small as possible, and in addition, a suction force smaller than the suction force of the excitation coil 15 is applied to generate a pulsating suction force that can remove light welds. Make it.

２１．２２は励磁コイル１５と励磁コイル端子４．５を
接続するリード線、２３は可動接触子８とコイル２０を
接続するリード線、２４は接点端子３とコイル２０を接
続するリード線、２６は励磁コイル１５の直流電源、２
７は励磁コイル１５の制御スイッチである。しかして、
両接点７，９及び両補助接点３７．３９に、すなわち両
接点端子２．３間に交流電源２８と負荷２９を直列に接
続する。21.22 is a lead wire that connects the excitation coil 15 and the excitation coil terminal 4.5, 23 is a lead wire that connects the movable contact 8 and the coil 20, 24 is a lead wire that connects the contact terminal 3 and the coil 20, 26 is the DC power supply of the excitation coil 15, 2
7 is a control switch for the excitation coil 15. However,
An AC power source 28 and a load 29 are connected in series to both contacts 7, 9 and both auxiliary contacts 37.39, that is, between both contact terminals 2.3.

（動作） 第１図及び第２図は、励磁コイル１５が励磁されていな
い状態で、両接点７．９及び両補助接点３７．３９はと
もに開成状態にある。この状態で励磁コイル１５が励磁
されると、復帰ばね１８のばね力に抗して両アマチャ１
６．１７は鉄心の両端面１３ａ、１３ｂに吸引される。(Operation) In FIGS. 1 and 2, the excitation coil 15 is not excited, and both contacts 7.9 and auxiliary contacts 37.39 are both in an open state. When the excitation coil 15 is excited in this state, both armatures 1 resist the spring force of the return spring 18.
6.17 is attracted to both end surfaces 13a and 13b of the iron core.

従って、両回動接触子８，３８は両アマチャ１６．１７
に応動し、第３図の如く、各可動接点９，３９が各固定
接点７．３７に接触して閉成状態となる。この閉成状態
では、負荷電流はコイル２０より両補助接点３７．３９
の方に大半が流れるので、両アマチャ１６．１７には殆
ど励磁コイル１５のみの安定した吸引力が作用するとと
もに、コイル２０による温度上昇や電力消費が殆どない
。また、負荷電流のいくらかはコイル２０に流れるので
、両補助接点３７．３９より両接点７，９の方が電流値
が大きく、従って両接点７，９の方に軽溶着が発生し易
い。Therefore, both rotary contacts 8, 38 are connected to both armatures 16.17.
In response to this, each movable contact 9, 39 comes into contact with each fixed contact 7, 37 to be in a closed state, as shown in FIG. In this closed state, the load current flows from the coil 20 to both auxiliary contacts 37.39
Since most of the current flows toward the armatures 16 and 17, the stable attraction force of only the excitation coil 15 acts on both armatures 16 and 17, and there is almost no temperature rise or power consumption due to the coil 20. Further, since some of the load current flows through the coil 20, the current value is larger at both contacts 7 and 9 than at both auxiliary contacts 37 and 39, and therefore light welding is more likely to occur at both contacts 7 and 9.

次に、両接点７．９間に軽溶着が発生した場合を説明す
ると、制御スイッチ２７が開成されて励磁コイル１５が
励磁されなくなると、補助アマチャ１７のみ復帰（両補
助接点３７．３９は開成状態）し、第４図の如く、コイ
ル２０は交流電源２日により励磁される状態となるから
、アマチャ１６に影響する吸引力は脈動する。従ってア
マチャ１６は、この脈動吸引力と復帰ばね１８のばね力
を受けて振動し、その振動がアマチャ１６や可動接触子
８を介して両接点７，９に伝わってその間の軽溶着を引
き外すのである。Next, to explain the case where light welding occurs between both contacts 7.9, when the control switch 27 is opened and the excitation coil 15 is no longer excited, only the auxiliary armature 17 returns (both auxiliary contacts 37.39 are opened). Since the coil 20 is excited by the AC power supply as shown in FIG. 4, the attractive force that affects the armature 16 pulsates. Therefore, the armature 16 vibrates in response to this pulsating attraction force and the spring force of the return spring 18, and the vibration is transmitted to both contacts 7 and 9 via the armature 16 and the movable contact 8, and removes the light welding between them. It is.

第５図は、本発明の第２実施例を示すもので、両補助接
点３７．３９の動作を両接点７．９に対して、先入れ後
切りとなるようにしである。具体的には、アマチャ１６
と鉄心の一端面１３２間の釈放時間隔ｇ１より補助アマ
チャ１７と鉄心の他端面Ｌ３ｂ間の釈放時間隔ｇ２を小
さくし、かつ間隙ｇ１に非磁性薄板３０が設けである。FIG. 5 shows a second embodiment of the present invention, in which both auxiliary contacts 37 and 39 operate in a first-in, second-off manner with respect to both contacts 7.9. Specifically, amateur 16
The release time interval g2 between the auxiliary armature 17 and the other end face L3b of the iron core is made smaller than the release time interval g1 between the iron core and one end face 132 of the iron core, and a non-magnetic thin plate 30 is provided in the gap g1.

その他の構成は先の実施例と同様で同一部材には同一符
号が付しである。このものでは、間隙ｇｌ、ｇ２差と非
磁性薄板３０により、両補助接点３７，３９の動作が両
接点７．９に対して、先入れ後切りとなり、両補助接点
３７．３９が負荷電流を開閉しない。従って、先の実施
例と同様の作用効果を奏するとともに、両補助接点３７
．３９は極めて小型、安価なものにすることができる。The rest of the structure is the same as in the previous embodiment, and the same members are given the same reference numerals. In this case, due to the difference between the gaps gl and g2 and the non-magnetic thin plate 30, the operation of both auxiliary contacts 37 and 39 is first-insertion-later-off with respect to both contacts 7.9, and both auxiliary contacts 37 and 39 handle the load current. Does not open or close. Therefore, the same effects as in the previous embodiment are achieved, and both auxiliary contacts 37
．． 39 can be made extremely small and inexpensive.

第６図は、本発明の第３実施例を示すもので、両補助接
点３７．３９の動作を両接点７．９に対して、後切り先
入れとなるようにしである。具体的には、第２実施例と
は逆にアマチャ１６と鉄心の一端面１３２間の釈放時間
隔ｇ１より補助アマチャ１７と鉄心の他端面１３ｂ間の
釈放時間隔ｇ２を大きくしである。その他の構成は先（
第１）の実施例と同様で同一部材には同一符号が付しで
ある。このものでは、間隙ｇＬ、ｇ２差により、両補助
接点３７．３９の動作が両接点７，９に対して、後切り
先入りとなるので、先の実施例と同様の作用効果を奏す
るとともに、通常の閉成動作時の前半にはコイル２０に
も負荷電流が流れるので、アマチャ１６に対する吸引力
が増大して両接点７．９間のバウンスが減少し、これら
の消耗を低減し得るものとなる。FIG. 6 shows a third embodiment of the present invention, in which both auxiliary contacts 37, 39 operate in a last-cut, first-in manner with respect to both contacts 7.9. Specifically, contrary to the second embodiment, the release time interval g2 between the auxiliary armature 17 and the other end surface 13b of the iron core is made larger than the release time interval g1 between the armature 16 and the one end surface 132 of the iron core. Other configurations will be done first (
This is similar to the first embodiment, and the same members are given the same reference numerals. In this case, due to the difference between the gaps gL and g2, the operation of both auxiliary contacts 37 and 39 is to cut first with respect to both contacts 7 and 9, so that the same effect as in the previous embodiment is achieved, and During the first half of the normal closing operation, the load current also flows through the coil 20, so the attraction force to the armature 16 increases and the bounce between both contacts 7.9 is reduced, which can reduce wear and tear. Become.

なお、本実施例はリレーに通用したもので説明したが、
コンタクタ等にも通用でき、またコイル２０は励磁コイ
ル１５の外周にのみ巻回されることに限定されるもので
なく、ヨーク１１に巻回してもよい。In addition, although this example was explained as being applicable to a relay,
The coil 20 is not limited to being wound only around the outer periphery of the excitation coil 15, but may also be wound around the yoke 11.

［発明の効果］ 本発明の交流用接点開閉装置は、固定接点を設けた固定
接触子と可動接点を設けた可動接触子とを有し、可動接
触子が電磁石装置の励磁コイルを制御することにより変
位するアマチャに応動して両接点を開閉動作せしめる接
点開閉装置であって、電磁石装置により両接点と同様に
開閉動作せしめられる補助固定接点及び補助可動接点を
該両接点と直列に設けるとともに、両？＋！助接点に並
列接続されるコイルを電磁石装置における励磁コイルと
同様に作用し得る位置に巻回し、両接点及び両補助接点
に交流電源と負荷を直列に接続してなるものであるから
、両接点間に軽溶着が生じた場合、コイルに交流電流が
流れ続けるので電磁石装置には脈動する吸引力が発生し
、従ってこの吸引力がアマチャや可動接触子を介して両
接点に伝わり、その結果軽溶着を引き外すことができ、
もって接点の長寿命化が図れ、さらに閉成状態での負荷
電流はコイルに殆ど流れないので、吸引力が安定しかつ
コイルによる温度上昇や電力消費が殆どないものとなる
。[Effects of the Invention] The AC contact switching device of the present invention has a fixed contact provided with a fixed contact and a movable contact provided with a movable contact, and the movable contact controls the excitation coil of the electromagnet device. A contact opening/closing device that opens and closes both contacts in response to an armature displaced by an armature, wherein an auxiliary fixed contact and an auxiliary movable contact that are opened and closed in the same manner as both contacts by an electromagnetic device are provided in series with the two contacts, Both? +! A coil connected in parallel to the auxiliary contact is wound in a position where it can act in the same way as an excitation coil in an electromagnet device, and an AC power source and a load are connected in series to both contacts and both auxiliary contacts, so it is a double contact. If light welding occurs between them, the alternating current continues to flow through the coil, creating a pulsating attractive force in the electromagnetic device, and this attractive force is transmitted to both contacts via the armature and movable contact, resulting in light welding. The weld can be removed,
As a result, the life of the contact can be extended, and since almost no load current flows through the coil in the closed state, the attractive force is stable and there is almost no temperature rise or power consumption due to the coil.

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

第１図は、リレーに通用した本発明の一実施例を示すも
ので、（ａ）は平面図、（ｂ） は側面図、 第２図は、その接続図、 第３図は、その閉成状態の接続図、 第４図は、その軽溶着発生時の接続図、第５図は、本発
明の第２実施例を示す平面図、第６図は、本発明の第３
実施例を示す平面図である。 １・・・器台、６・−固定接触子、７−固定接点、８−
可動接触子、９−可動接点、１０−電磁石装置、１１−
ヨーク、１３−・−鉄心、１５−・励磁コイル、１６−
アマチャ、１８・・−復帰ばね、２０−・−コイル、２
８・−交流電源、２９・−・負荷、３６−・−補助固定
接触子、３７〜・〜補助固定接点、３８−補助可動接触
子、３９−・−補助可動接点。Figure 1 shows an embodiment of the present invention applicable to a relay; (a) is a plan view, (b) is a side view, Figure 2 is its connection diagram, and Figure 3 is its closed view. 4 is a connection diagram when light welding occurs, FIG. 5 is a plan view showing the second embodiment of the present invention, and FIG. 6 is a connection diagram of the third embodiment of the present invention.
FIG. 2 is a plan view showing an example. 1... Instrument stand, 6- Fixed contact, 7- Fixed contact, 8-
Movable contact, 9-movable contact, 10-electromagnetic device, 11-
Yoke, 13--iron core, 15--excitation coil, 16-
Armature, 18...-Return spring, 20--Coil, 2
8.-AC power supply, 29.--Load, 36-.-Auxiliary fixed contact, 37-.-Auxiliary fixed contact, 38-Auxiliary movable contact, 39-.-Auxiliary movable contact.

Claims (1)

【特許請求の範囲】[Claims] （１）固定接点を設けた固定接触子と可動接点を設けた
可動接触子とを有し、該可動接触子が電磁石装置の励磁
コイルを制御することにより変位するアマチヤに応動し
て両接点を開閉動作せしめる接点開閉装置であって、前
記電磁石装置により前記両接点と同様に開閉動作せしめ
られる補助固定接点及び補助可動接点を前記両接点と直
列に設けるとともに、前記両補助接点に並列接続される
コイルを前記電磁石装置における励磁コイルと同様に作
用し得る位置に巻回し、該両接点及び両補助接点に交流
電源と負荷を直列に接続してなる交流用接点開閉装置。(1) It has a fixed contact with a fixed contact and a movable contact with a movable contact, and the movable contact operates both contacts in response to the displacing armature by controlling the excitation coil of the electromagnet device. A contact opening/closing device for opening and closing operations, wherein an auxiliary fixed contact and an auxiliary movable contact are provided in series with the two contacts and are connected in parallel to both the auxiliary contacts. An alternating current contact switching device comprising a coil wound in a position where it can act in the same manner as the excitation coil in the electromagnet device, and an alternating current power source and a load connected in series to both contacts and both auxiliary contacts.