JPH0757606A - Contact device - Google Patents
Contact deviceInfo
- Publication number
- JPH0757606A JPH0757606A JP20611393A JP20611393A JPH0757606A JP H0757606 A JPH0757606 A JP H0757606A JP 20611393 A JP20611393 A JP 20611393A JP 20611393 A JP20611393 A JP 20611393A JP H0757606 A JPH0757606 A JP H0757606A
- Authority
- JP
- Japan
- Prior art keywords
- contact
- movable
- shaft
- contactor
- trip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Breakers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、短絡電流のような大
きな電流を遮断する限流装置や回路遮断器等の接触子装
置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contactor device such as a current limiting device or a circuit breaker for interrupting a large current such as a short circuit current.
【０００２】[0002]
【従来の技術】従来、回路遮断器には回路を開閉する機
能の他に、過電流などの事故電流等から回路を保護する
ために自動的に回路を遮断するトリップ機能がある。2. Description of the Related Art Conventionally, in addition to the function of opening and closing a circuit, a circuit breaker has a trip function of automatically breaking the circuit in order to protect the circuit from accidental current such as overcurrent.
【０００３】図１は従来の３極型回路遮断器１０１を閉
路状態にて示す中央極側面断面図である。回路遮断器１
０１は、絶縁成型物のベース１０２とカバー１０３の内
部に主回路導電部、開閉機構部、トリップ機構部１２１
等が収納されて構成されている。FIG. 1 is a side sectional view of a center pole showing a conventional three-pole type circuit breaker 101 in a closed state. Circuit breaker 1
01 is a main circuit conductive portion, an opening / closing mechanism portion, a trip mechanism portion 121 inside the base 102 and the cover 103 of the insulating molded product.
Etc. are stored and configured.
【０００４】主回路導電部は、電源側端子１０４を有す
る固定接触子１０５と、固定接触子１０５に接合された
固定接点１０６と、固定接点１０６と接離可能な可動接
点１０７と、一端に可動接点１０７が接合されて他端に
可撓導体１０８の一端が接合された可動接触子１０９
と、可撓導体１０８と、過電流が流れた時にトリップ機
構１２１を作動させるトリップ素子１１０と、負荷側端
子１１２とから構成されている。The main circuit conductive portion has a fixed contact 105 having a power supply side terminal 104, a fixed contact 106 joined to the fixed contact 105, a movable contact 107 which can be brought into contact with and separated from the fixed contact 106, and movable at one end. Movable contactor 109 in which contact 107 is joined and one end of flexible conductor 108 is joined to the other end
A flexible conductor 108, a trip element 110 that activates the trip mechanism 121 when an overcurrent flows, and a load-side terminal 112.
【０００５】なお、トリップ素子１１０には、小さい過
電流が流れた時に時間をかけて動作するバイメタルを使
用した熱動素子と、大きい過電流が流れた時に瞬時に動
作する電磁石を使用した電磁素子が通常併設される。As the trip element 110, a thermal element using a bimetal that operates over time when a small overcurrent flows, and an electromagnetic element using an electromagnet that operates instantaneously when a large overcurrent flows. Is usually attached.
【０００６】開閉機構部は、図示されない固定部材に回
動自在に一端１１４ａが軸支されたクロスバ１１４と、
可動接触子１０９をクロスバ１１４において回動自在に
軸支する可動接触子軸１１５と、可動接点１０７が固定
接点１０６に接触する方向に可動接触子１０９を偏倚さ
せる接圧ばね１１６と、図示されない固定軸に回動自在
に軸支されたハンドル１１８と、投入力およ遮断力をも
たらす操作ばね１２７と、詳細には説明しないが、ハン
ドル１１８とクロスバ１１４の中央極部分の他端に形成
される貫通孔１１４ｂとを連結するリンク機構１２０を
含む機構とから構成されている。The opening / closing mechanism section includes a cross bar 114 whose one end 114a is rotatably supported by a fixing member (not shown),
A movable contactor shaft 115 that rotatably supports the movable contactor 109 in the crossbar 114, a contact pressure spring 116 that biases the movable contactor 109 in the direction in which the movable contact 107 contacts the fixed contact 106, and a fixed member (not shown). A handle 118 rotatably supported by a shaft, an operating spring 127 for providing a throwing force and a blocking force, and although not described in detail, formed on the handle 118 and the other end of the central pole portion of the crossbar 114. The link mechanism 120 is connected to the through hole 114b.
【０００７】図１は、可動接点１０７が接圧ばね１１６
のばね力によって固定接点１０６に接触しており、この
回路遮断器１０１が閉路位置にある状態を示している。In FIG. 1, the movable contact 107 has a contact pressure spring 116.
The circuit breaker 101 is in contact with the fixed contact 106 by the spring force of, and the circuit breaker 101 is in the closed position.
【０００８】次に、この様な回路遮断器の動作に就いて
説明する。先ず、この回路遮断器１０１の開路操作は、
ハンドル１１８を反時計方向に回動すると、開閉機構部
が動作して、クロスバー１１４はその貫通孔１１４ｂに
おいて作用力を受けて、クロスバー１１４の一端１１４
ａを中心として可動接触子１１９と共に反時計方向に回
動し、可動接点１０７は固定接点１０６から開離して、
回路遮断器は従って開路状態となる。尚、閉路操作はこ
の逆となる。Next, the operation of such a circuit breaker will be described. First, the operation of opening the circuit breaker 101 is
When the handle 118 is rotated in the counterclockwise direction, the opening / closing mechanism portion operates, and the crossbar 114 receives the acting force in the through hole 114b, and the one end 114 of the crossbar 114 is received.
Rotating counterclockwise with the movable contact 119 about a, the movable contact 107 is separated from the fixed contact 106,
The circuit breaker is therefore open. The closing operation is the reverse of this.
【０００９】次に、図１の閉路状態において、主回路導
電部に過電流が流れた時の動作を説明する。過電流が小
さい場合には、ジュール熱によって引外し素子１１０の
熱動素子が動作して引外し機構１２１を動作させる。従
って、この結果、開閉機構部が動作して、クロスバ１１
４はその貫通孔１１４ｂにおいて作用力を受けて、クロ
スバー１１４の一端１１４ａを中心として可動接触子１
０９と共に反時計方向に回動し、可動接点１０７は固定
接点１０６から開離するので、回路遮断器はトリップ状
態となる。Next, the operation when an overcurrent flows through the conductive portion of the main circuit in the closed state of FIG. 1 will be described. When the overcurrent is small, the thermal element of the trip element 110 operates due to Joule heat to operate the trip mechanism 121. Therefore, as a result, the opening / closing mechanism operates and the crossbar 11
4 receives the acting force in the through hole 114b, and the movable contact 1 is centered on one end 114a of the crossbar 114.
The movable contact 107 is separated from the fixed contact 106 by rotating counterclockwise with 09, so that the circuit breaker is in a trip state.
【００１０】過電流が大きい場合には、引外し素子１１
０の電磁素子が瞬時に動作して、熱動素子と同様に回路
遮断器をトリップ状態にする。When the overcurrent is large, the trip element 11
The electromagnetic element of 0 operates instantly and puts the circuit breaker in a trip state like the thermal element.
【００１１】[0011]
【発明が解決しようとする課題】このような従来の回路
遮断器に短絡電流のような大電流が流れた時に、可動接
点１０７が固定接点１０６から開離するには、次の２通
りの可能性がある。先ず、第１は前述の引外し素子１１
０の動作によるもので、第２は接点間、若しくは固定接
触子１０５と可動接触子１０９の対向する面の間、に発
生する電磁反発力によるものである。When a large current such as a short-circuit current flows in such a conventional circuit breaker, the movable contact 107 can be separated from the fixed contact 106 in the following two ways. There is a nature. First, the first is the trip element 11 described above.
The second is due to the electromagnetic repulsive force generated between the contacts or between the facing surfaces of the fixed contact 105 and the movable contact 109.
【００１２】この様な第１によるものでは、引外し素子
１１０の電磁素子が通電瞬時に動作するが、この動作に
引き続いて動作するトリップ機構部１２１と開閉機構部
には機械的動作遅れが生ずる。従って、通電瞬時からや
ゝ遅れて可動接点１０７が固定接点１０６から開離す
る。In the first embodiment, the electromagnetic element of the trip element 110 operates instantly when electricity is applied, but a mechanical operation delay occurs in the trip mechanism section 121 and the opening / closing mechanism section that operate subsequent to this operation. . Therefore, the movable contact 107 separates from the fixed contact 106 with a slight delay from the moment of energization.
【００１３】併し乍ら、第２の電磁反発力によるもので
は、電磁反発力の作用力が直接可動接触子１０９に作用
するために、可動接触子１０９が接圧ばね１１６のばね
力に抗して反時計方向に回動し、可動接点１０７が固定
接点１０６から通電瞬時に開離する。そして、短絡電流
が遮断されると、電磁反発力がなくなり、ばね力によっ
て可動接触子１０９が時計方向に回動する。この間の時
間は極めて短く、前述の第１の可能性で説明した引外し
素子１１０の動作によって接点が開離する時間よりも短
い場合があり、この場合には可動接点１０７が固定接点
１０６に再接触して電流が再び流れて、遮断性能が著し
く低下し、最悪の場合には遮断不能に陥る。However, in the case of the second electromagnetic repulsive force, since the acting force of the electromagnetic repulsive force directly acts on the movable contact 109, the movable contact 109 reacts against the spring force of the contact spring 116. When the movable contact 107 is rotated clockwise, the movable contact 107 is separated from the fixed contact 106 instantly when electricity is applied. Then, when the short-circuit current is cut off, the electromagnetic repulsion force disappears, and the movable contact 109 is rotated clockwise by the spring force. The period of time during this period is extremely short, and may be shorter than the period of time during which the contact is opened by the operation of the trip element 110 described in the first possibility described above. In this case, the movable contact 107 is reset to the fixed contact 106. When they come into contact with each other, a current flows again, the breaking performance is significantly lowered, and in the worst case, the breaking becomes impossible.
【００１４】このような現象に対しては、本出願人によ
る実開昭63−109432号公報に提案されているようなラッ
チ機構を利用する方法がある。併し、この提案によるラ
ッチ機構は多くの部品を要し、大形の回路遮断器では可
能であるが、小形の回路遮断器では実現が困難で且つ高
価となる。For such a phenomenon, there is a method of utilizing a latch mechanism as proposed in Japanese Utility Model Laid-Open No. Sho 63-109432 by the present applicant. At the same time, the latch mechanism according to this proposal requires many parts and is possible with a large circuit breaker, but it is difficult and expensive to implement with a small circuit breaker.
【００１５】従って、この発明の目的は、短絡電流に対
する遮断性能が良く且つ安価な接触子装置を提供するこ
とにある。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a contact device which has a good breaking performance against a short circuit current and is inexpensive.
【００１６】[0016]
【課題を解決するための手段】この発明に依れば、接触
子装置は、固定接触子、前記固定接触子と接離する可動
接触子、前記可動接触子を軸支する可動接触子軸、前記
可動接触子軸を保持する保持部材からなる接触子機構に
おいて、前記保持部材と前記可動接触子の双方には前記
可動接触子が前記可動接触子軸の周りを回動した時に互
いに当接可能な突起が形成され、少なくとも前記保持部
材の前記可動接触子軸の保持部分は前記可動接触子の回
動面と平行な方向に遊びをもって形成されるか、若しく
は前記可動接触子の前記可動接触子軸の挿通孔が遊びを
もって形成され、前記保持部材および前記可動接触子の
双方の前記突起部が当接する方向に前記可動接触子を偏
倚するばねが設けられることを特徴としており、また、
前記保持部材は固定部材に軸支され、前記保持部材を回
動可能にする開閉操作機構および前記接触子装置に大電
流が流れた時に動作して前記開閉機構を動作させる引外
し機構を有することを特徴としている。According to the present invention, a contactor device includes a fixed contactor, a movable contactor that contacts and separates from the fixed contactor, a movable contactor shaft that pivotally supports the movable contactor, In a contact mechanism including a holding member that holds the movable contact shaft, both the holding member and the movable contact can contact each other when the movable contact rotates around the movable contact shaft. A protrusion is formed, and at least the holding portion of the movable contactor shaft of the holding member is formed with play in a direction parallel to the rotating surface of the movable contactor, or the movable contactor of the movable contactor is formed. The insertion hole of the shaft is formed with play, and a spring that biases the movable contact in a direction in which the protrusions of both the holding member and the movable contact come into contact is provided, and
The holding member is pivotally supported by a fixed member, and has an opening / closing mechanism that allows the holding member to rotate, and a trip mechanism that operates when a large current flows through the contact device to operate the opening / closing mechanism. Is characterized by.
【００１７】[0017]
【作用】請求項１の発明に依れば、この発明の接触子装
置は、閉路状態において、短絡電流のような大電流が流
れた時に電磁反発力が作用して瞬時に可動接触子が開離
方向に回動し、ばねの作用力によって可動接触子の突起
部と可動接触子軸の保持部材の突起部が当接する。そし
て、この発明の接触子装置においては、保持部材の可
動接触子軸を保持する部分に遊びがあるか、可動接触
子の可動接触子軸の挿通孔に遊びがあるか、若しくは
保持部材の可動接触子軸を保持する部分および可動接触
子の可動接触子軸の挿通孔の双方に遊びがあるために、
可動接触子はその回動面を平行移動可能である。従っ
て、可動接触子の突起部が保持部材の突起部を摺動移動
する時にばねの作用力に抗して、可動接触子はその回動
中心が双方の突起部の係合量に相当する距離だけ平行移
動しながら回動する。According to the invention of claim 1, in the contactor device of the invention, when a large current such as a short-circuit current flows in the closed state, the electromagnetic repulsive force acts to instantly open the movable contactor. It rotates in the separating direction, and the protrusion of the movable contactor and the protrusion of the holding member for the movable contactor shaft come into contact with each other by the action force of the spring. In the contactor device of the present invention, there is play in the portion of the holding member that holds the movable contactor shaft, there is play in the insertion hole of the movable contactor shaft of the movable contactor, or the holding member is movable. Since there is play in both the part that holds the contactor shaft and the insertion hole of the movable contactor shaft of the movable contactor,
The movable contactor can move its rotating surface in parallel. Therefore, when the protrusion of the movable contact slides on the protrusion of the holding member, the center of rotation of the movable contact is a distance corresponding to the engagement amount of both protrusions against the acting force of the spring. Rotate while moving in parallel.
【００１８】そして、可動接触子の突起部が保持部材の
突起部の反対側に移動して可動接触子は反転し、双方の
突起部の摺動は解消して、可動接触子の回動中心はばね
の作用力によって元の位置に復帰する。Then, the protrusion of the movable contact moves to the opposite side of the protrusion of the holding member, the movable contact is reversed, the sliding of both protrusions is eliminated, and the center of rotation of the movable contact is eliminated. Is returned to its original position by the acting force of the spring.
【００１９】反転した時に可動接触子と固定接触子の開
極距離は最大となり、この状態になる迄に電流は極めて
短い時間で遮断される。When it is reversed, the contact opening distance between the movable contact and the fixed contact becomes maximum, and the current is interrupted in an extremely short time before reaching this state.
【００２０】請求項２の発明に依れば、電流が遮断され
て電磁反発力の作用力がなくなった時に、ばねの作用力
が可動接触子と保持部材の突起部の摩擦力より大きい場
合には摩擦力によって復帰スピードが減殺されて、可動
接触子は保持部材に関して元の状態に復帰する。この様
に元の状態に復帰する場合には、接触子が再接触する可
能性があるが、復帰スピードが減殺されているために再
接触前に引外し機構および開閉機構が動作して、可動接
触子が固定接触子から開離する方向に保持部材が回動
し、接触子が再接触することはない。According to the second aspect of the present invention, when the acting force of the spring is greater than the frictional force between the movable contact and the protrusion of the holding member when the acting force of the electromagnetic repulsive force disappears when the current is cut off. The return speed is reduced by the frictional force, and the movable contact returns to its original state with respect to the holding member. When returning to the original state in this way, the contact may re-contact, but since the return speed is reduced, the tripping mechanism and opening / closing mechanism operate before moving again, The holding member rotates in the direction in which the contactor is separated from the fixed contactor, and the contactor does not come into contact again.
【００２１】[0021]
【実施例】図面の図２はこの発明による一実施例の３極
型回路遮断器を示す閉路状態の側面断面図である。回路
遮断器１は絶縁成型物のベース２とカバー３の内部に主
回路導電部、開閉機構部、トリップ機構部等が収納され
て構成されている。この様な構成を以下に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 2 of the drawings is a side sectional view in a closed state showing a three-pole type circuit breaker according to one embodiment of the present invention. The circuit breaker 1 is configured by housing a main circuit conductive portion, an opening / closing mechanism portion, a trip mechanism portion, and the like inside a base 2 and a cover 3 of an insulating molded product. Such a configuration will be described below.
【００２２】主回路導電部は、電源側端子４を有する固
定接触子５と、固定接触子５に接合された固定接点６
と、固定接点６と接離可能な可動接点７と、一端に可動
接点７が接合されて他端に可撓リード８の一端が接合さ
れた可動接触子９と、可撓リード８の他端とヒータ１０
の一端を接続する中継端子１１およびヒータ１０の他端
と負荷側端子１２を接続する可撓リード１３とから構成
される。The main circuit conductive portion has a fixed contact 5 having a power source side terminal 4 and a fixed contact 6 joined to the fixed contact 5.
A movable contact 7 that can be brought into contact with and separated from the fixed contact 6, a movable contactor 9 to which the movable contact 7 is joined at one end and one end of a flexible lead 8 at the other end, and the other end of the flexible lead 8. And heater 10
And a flexible lead 13 that connects the other end of the heater 10 and the load-side terminal 12 to each other.
【００２３】開閉機構部は、図示されない固定部材に回
動自在に軸支されたクロスバー１４と、可動接触子９を
クロスバー１４において回動自在に軸支する可動接触子
軸１５と、可動接点７が固定接点６に接触する方向に可
動接触子９を偏倚させる接圧ばね１６と、固定軸１７に
回動自在に軸支されたハンドル１８と、一端が固定軸１
９により回動可能に軸支されて他端が引外し機構部によ
って動作する爪２０と係合自在であるトリップレバー２
１と、一端が第１連結点２２においてクロスバー１４に
回動自在に偏心して連結された第１リンク２３と、第１
リンク２３の他端とトリップレバー２１との間にそれぞ
れ第２連結点２４および第３連結点２５において回動自
在に連結された第２リンク２６と、ハンドル１８と第２
連結点２４との間に架設された操作ばね２７とから構成
されている。The opening / closing mechanism portion includes a cross bar 14 rotatably supported by a fixed member (not shown), a movable contactor shaft 15 rotatably supporting the movable contactor 9 on the crossbar 14, and a movable contactor shaft 15. A contact pressure spring 16 that biases the movable contact 9 in a direction in which the contact 7 contacts the fixed contact 6, a handle 18 rotatably supported by a fixed shaft 17, and one end of the fixed shaft 1
A trip lever 2 which is rotatably supported by a shaft 9 and is engageable with a claw 20 which is operated by a tripping mechanism portion at the other end.
1, a first link 23 having one end rotatably eccentrically connected to the crossbar 14 at the first connection point 22, and a first link 23
The second link 26 rotatably connected between the other end of the link 23 and the trip lever 21 at the second connection point 24 and the third connection point 25, the handle 18 and the second link 26, respectively.
It is composed of an operating spring 27 that is installed between the connecting point 24 and the connecting point 24.
【００２４】引外し機構部は、固定部材に回動自在に軸
支されたトリップシャフト２９と、トリップシャフト２
９に固定された爪２０及びトリップピース３０と、爪２
０がトリップレバー２１と係合する方向にトリップシャ
フト２９を偏倚させるトリップシャフト復帰ばね３１
と、ヒータ１０に並設されて一端が固定され他端にトリ
ップピース３０と対向するバイメタル調整ねじ３５が設
けられたバイメタル３２と、ヒータ１０を囲むように設
けられる断面が「コ」の字形で磁性材料から造られた固
定コアー３３と、この固定コアー３３の「コ」の字形の
脚部に一端が対向し他端がトリップピース３０に対向し
ていて且つその中間部３３ａにおいて図示されない固定
部材に回動自在に軸支された磁性材料から造られた可動
コアー３４とから構成される。The trip mechanism includes a trip shaft 29 rotatably supported by a fixed member and a trip shaft 2.
Claw 20 and trip piece 30 fixed to 9, and claw 2
Trip shaft return spring 31 that biases trip shaft 29 in the direction in which 0 engages trip lever 21.
And a bimetal 32 provided in parallel with the heater 10 and having one end fixed and the other end provided with a bimetal adjusting screw 35 facing the trip piece 30, and a cross section provided so as to surround the heater 10 in a U shape. A fixed core 33 made of a magnetic material, and a fixed member (one end of which faces the "U" -shaped leg of the fixed core 33 and the other end of which faces the trip piece 30 and which is not shown in the intermediate portion 33a). The movable core 34 is made of a magnetic material and is rotatably supported by the movable core 34.
【００２５】この様に構成された回路遮断器の図２に示
される閉路状態において、先ず、操作ばね２７のばね力
の水平分力は第２連結点２４を右方向に偏倚させるの
で、第２連結点２４は図示されない固定部材に当接し、
第１、第２および第３連結点２２、２４及び２５がほゞ
一直線になって停止している。この時に、可動接点７は
接圧ばね１６のばね力で固定接点６と接触している。In the closed state shown in FIG. 2 of the circuit breaker constructed as described above, first, the horizontal component of the spring force of the operating spring 27 biases the second connecting point 24 to the right. The connecting point 24 abuts a fixing member (not shown),
The first, second and third connecting points 22, 24 and 25 are stopped in a substantially straight line. At this time, the movable contact 7 is in contact with the fixed contact 6 by the spring force of the contact pressure spring 16.
【００２６】次に、この様に構成される回路遮断器１の
動作について説明する。この回路遮断器１の開路操作
は、先ず、ハンドル１８を反時計方向に回動させる。ハ
ンドル１８のこの回動によって、操作ばね２７が第２連
結点２４を中心として反時計方向に回動して操作ばね２
７の作用線が第３連結点２５を越えると、第２連結点２
４が操作ばね２７のばね力によって第３連結点２５を中
心として時計方向に回動する。これに依ってクロスバー
１４は第１リンク２３を介して可動接触子９と共に反時
計方向に回動して、固定接点６と可動接点７は開離状態
となり、回路は開路される。この時、ハンドル１８は、
図示されない固定部材と当接して停止する。尚、閉路操
作はこの開路操作と逆になる。Next, the operation of the circuit breaker 1 thus constructed will be described. To open the circuit breaker 1, the handle 18 is first rotated counterclockwise. This rotation of the handle 18 causes the operation spring 27 to rotate counterclockwise about the second connection point 24, and the operation spring 2
When the line of action of 7 exceeds the third connecting point 25, the second connecting point 2
4 is rotated clockwise about the third connection point 25 by the spring force of the operation spring 27. As a result, the crossbar 14 rotates counterclockwise together with the movable contact 9 via the first link 23, the fixed contact 6 and the movable contact 7 are separated, and the circuit is opened. At this time, the handle 18 is
It stops by abutting a fixing member (not shown). The closing operation is the reverse of the opening operation.
【００２７】次に、図２の閉路状態において、主回路導
電部に過電流が流れた時の動作を説明する。過電流が小
さい時はジュール熱によってヒータ１０が発熱し、並設
されているバイメタル３２が加熱されてゆっくりと図示
の右方向に湾曲してバイメタル調整ねじ３５がトリップ
ピース３０に当接する。過電流が大きい時には磁気力に
よって可動コアー３４の一端が固定コアー３３に瞬時に
吸引されて時計方向に回動して、可動コアー３４の他端
がトリップピース３０と当接する。いずれの場合も、ト
リップシャフト２９を反時計方向に回動させることが出
来る。従って、トリップシャフト２９が反時計方向に回
動すると、爪２０とトリップレバー２１の係合が外れ
て、操作ばね２７のばね力によってトリップレバー２１
が固定軸１９を中心として時計方向へ回動する。これに
依って、第３連結点２５が操作ばね１８の作用線の右側
に移動して、第２連結点２４が第３連結点２５を中心と
して時計方向に回動しながら上方へ移動し、クロスバ１
４が第１リンク２３を介して可動接触子９と共に反時計
方向に回動して、固定接点６と可動接点７が開離状態と
なるので、回路は開路される。この時に、トリップレバ
ー２１が図示されない固定部材と当接して停止し、ハン
ドル１８は開路位置と閉路位置の中間のトリップ位置で
停止する。Next, the operation when an overcurrent flows in the conductive portion of the main circuit in the closed state of FIG. 2 will be described. When the overcurrent is small, the heater 10 generates heat due to Joule heat, and the bimetal 32 arranged in parallel is heated and slowly curved in the right direction in the drawing so that the bimetal adjusting screw 35 contacts the trip piece 30. When the overcurrent is large, one end of the movable core 34 is instantly attracted to the fixed core 33 by the magnetic force and rotated clockwise, and the other end of the movable core 34 contacts the trip piece 30. In either case, the trip shaft 29 can be rotated counterclockwise. Therefore, when the trip shaft 29 rotates counterclockwise, the engagement between the claw 20 and the trip lever 21 is disengaged, and the spring force of the operation spring 27 causes the trip lever 21 to move.
Rotates about the fixed shaft 19 in the clockwise direction. As a result, the third connecting point 25 moves to the right of the line of action of the operating spring 18, and the second connecting point 24 moves upward while rotating clockwise about the third connecting point 25. Crossbar 1
4 rotates in the counterclockwise direction together with the movable contact 9 via the first link 23, and the fixed contact 6 and the movable contact 7 are separated, so that the circuit is opened. At this time, the trip lever 21 comes into contact with a fixing member (not shown) and stops, and the handle 18 stops at a trip position intermediate between the open position and the closed position.
【００２８】尚、この様なトリップ状態から閉路状態に
するためには、ハンドル１８を一旦反時計方向に回動し
て、爪２０とトリップレバー２１を係合させて開路状態
にするリセット操作をした後に、ハンドル１８を時計方
向に回動する。In order to change from the trip state to the closed state, the handle 18 is once rotated counterclockwise to engage the claw 20 and the trip lever 21 to perform the reset operation to open the state. After that, the handle 18 is rotated clockwise.
【００２９】図３および図４はこの実施例の可動接触子
９をクロスバー１４に取り付けた状態を取り出して示し
た平面図および側面断面図である。クロスバー１４は、
各極毎に対向する壁１４ａ、１４ａを有しており、各々
の壁１４ａ、１４ａには互いに対向するように壁１４
ｂ、１４ｂが夫々形成されている。また、各溝１４ｂの
一端１４ｃには壁がなく開口しており、他端１４ｄには
壁が形成されている。壁１４ａ、１４ａと直交する壁１
４ｆには２個の貫通孔１４ｅ、１４ｅが形成されてい
る。更に、可動接触子９には孔が形成されており、可動
接触子軸１５が挿通されている。また、この可動接触子
９の両側で可動接触子軸１５の周りにはダブルトーショ
ン形のねじりばねから成る接圧ばね１６が設けられてい
る。この接圧ばね１６の中央部１６ｃは可動接触子９に
係合しており、接圧ばね１６の端部１６ａ、１６ａは
「Ｖ」字形状に形成されていてクロスバー１４の貫通孔
１４ｅ、１４ｅに挿通し係合している。FIG. 3 and FIG. 4 are a plan view and a side sectional view showing a state in which the movable contact 9 of this embodiment is attached to the crossbar 14. The crossbar 14
It has walls 14a, 14a facing each other for each pole, and each wall 14a, 14a has a wall 14a facing each other.
b and 14b are formed respectively. Further, one end 14c of each groove 14b is open without a wall, and the other end 14d is formed with a wall. Wall 14a, wall 1 orthogonal to 14a
Two through holes 14e, 14e are formed in 4f. Furthermore, a hole is formed in the movable contactor 9, and the movable contactor shaft 15 is inserted therethrough. Further, on both sides of the movable contactor 9, a contact pressure spring 16 composed of a double torsion type torsion spring is provided around the movable contactor shaft 15. The central portion 16c of the contact pressure spring 16 is engaged with the movable contactor 9, and the end portions 16a, 16a of the contact pressure spring 16 are formed in a "V" shape, and the through hole 14e of the crossbar 14, 14e is inserted and engaged with 14e.
【００３０】この様に、クロスバー１４に取り付けられ
た接圧ばね１６のばね力は、その端部１６ａにおいて貫
通孔１４ｅを形成する壁１４ｆと、その巻回部１６ｂに
おいて可動接触子軸１５をクロスバー１４の溝１４ｂの
他端の壁１４ｄに押し付けるように作用して、接圧ばね
１６の中央部１６ｃにおいて可動接触子９を時計方向に
回動するように作用する。図４において、可動接触子９
はクロスバー１４のストッパ１４ｇにおいて当接して可
動接触子９の回動が停止される。In this way, the spring force of the contact pressure spring 16 attached to the crossbar 14 causes the wall 14f forming the through hole 14e at the end 16a and the movable contactor shaft 15 at the winding portion 16b. It acts so as to press against the wall 14d at the other end of the groove 14b of the crossbar 14, and acts so as to rotate the movable contact 9 in the clockwise direction at the central portion 16c of the contact pressure spring 16. In FIG. 4, the movable contact 9
Comes into contact with the stopper 14g of the crossbar 14 to stop the rotation of the movable contactor 9.
【００３１】更に、可動接触子９には突起部９ａが、図
５において、突起部９ａの頂部が可動接触子１４の回動
中心、すなわち可動接触子軸１５の位置から距離Ｌ１に
なるように形成されている。突起部９ａと対向可能なよ
うに、クロスバー１４には突起部１４ｈが、突起部１４
ｈの頂部が可動接触子９の回動中心から距離Ｌ２になる
ように形成されている。こゝで、これら距離はＬ１＞Ｌ
２と成るように選ばれている。Further, the movable contact 9 has a projection 9a, and in FIG. 5, the top of the projection 9a is located at a distance L1 from the center of rotation of the movable contact 14, that is, the position of the movable contact shaft 15. Has been formed. The crossbar 14 is provided with a protrusion 14h so that it can be opposed to the protrusion 9a.
The top of h is formed to be a distance L2 from the center of rotation of the movable contact 9. Here, these distances are L1> L
Selected to be 2.
【００３２】図５乃至図８は、この実施例の回路遮断器
１に短絡電流のような大電流が流れた時の可動接触子９
の動作状況を説明する図であって、要部のみを示してあ
る。先ず、図５の状態において、回路遮断器の主回路導
電部に短絡電流のような大きな電流が流れると、固定接
触子５と可動接触子９との対向面と、可動および固定接
点６、７の間には電磁反発力が発生する。この電磁反発
力によって可動接触子９は反時計方向に回動して、突起
部９ａが突起部１４ｈと当接する。電磁反発力は更に、
突起部９ａが突起部１４ｈの辺を摺動して摺動摩擦力に
抗して可動接触子９を更に反時計方向に回動するように
作用する。この時に、可動接触子９の回動中心である可
動接触子軸１５は、接圧ばね１６のばね力に抗してクロ
スバー１４の溝１４ｂに沿って溝１４ｂの端部１４ｄか
ら移動する。そして、図６の如く突起部９ａの頂部が突
起部１４ｈの頂部に到達した後に、図７の如く突起部９
ａが図５と比較して突起部１４ｈの反対側に位置し、可
動接触子軸１５も溝１４ｂの端部１４ｄに復帰してい
る。この状態では、可動接点７と固定接点６の開離距離
はほゞ最大であり、且つ大きな電磁反発力によって可動
接触子９が瞬時に回動するために、アーク抵抗の増大が
速くて性能よく遮断を完了している。そしてこの状態に
おいて、電磁反発力は消失しているために接圧ばね１６
の復帰ばね力によって、可動接触子９は時計方向に回動
しようとする。5 to 8 show the movable contactor 9 when a large current such as a short-circuit current flows through the circuit breaker 1 of this embodiment.
FIG. 4 is a diagram for explaining the operating condition of FIG. First, in the state of FIG. 5, when a large current such as a short-circuit current flows in the main circuit conductive portion of the circuit breaker, the facing surfaces of the fixed contact 5 and the movable contact 9 and the movable and fixed contacts 6, 7 are connected. Electromagnetic repulsive force is generated between them. This electromagnetic repulsive force causes the movable contactor 9 to rotate counterclockwise, so that the protrusion 9a comes into contact with the protrusion 14h. Electromagnetic repulsion is further
The protrusion 9a slides along the side of the protrusion 14h, and acts so as to further rotate the movable contactor 9 counterclockwise against the sliding frictional force. At this time, the movable contactor shaft 15, which is the center of rotation of the movable contactor 9, moves from the end 14d of the groove 14b along the groove 14b of the crossbar 14 against the spring force of the contact pressure spring 16. Then, as shown in FIG. 6, after the top of the projection 9a reaches the top of the projection 14h, as shown in FIG.
a is located on the opposite side of the protrusion 14h as compared with FIG. 5, and the movable contactor shaft 15 is also returned to the end 14d of the groove 14b. In this state, the separation distance between the movable contact 7 and the fixed contact 6 is almost maximum, and the movable contact 9 is instantaneously rotated by a large electromagnetic repulsive force, so that the arc resistance increases rapidly and the performance is improved. The shutoff is complete. In this state, since the electromagnetic repulsive force has disappeared, the contact pressure spring 16
The movable contactor 9 tends to rotate in the clockwise direction due to the return spring force.
【００３３】この復帰ばね力が両突起部の摺動摩擦力よ
りも大きい場合には、自動的に可動接触子９は時計方向
に回動して元の位置に復帰する。併し、この時に可動接
触子９は摺動しながら回動するために回動速度が遅く元
の位置に復帰するまでに、電流通電と同時に、可動コア
ー３４が固定コアー３３に吸引されているために引外し
機構部および開閉機構部が作動して、クロスバー１４が
可動接触子９と共に反時計方向に回動して接点が再接触
することなく図８のトリップの状態となる。When the return spring force is larger than the sliding frictional force of both projections, the movable contactor 9 automatically rotates in the clockwise direction and returns to the original position. At the same time, since the movable contactor 9 rotates while sliding, the rotating speed is slow and the movable core 34 is attracted to the fixed core 33 at the same time when the current is applied until the movable contact 9 returns to its original position. Therefore, the tripping mechanism and the opening / closing mechanism actuate, the crossbar 14 rotates counterclockwise together with the movable contactor 9, and the contact is brought into the trip state of FIG. 8 without recontacting.
【００３４】復帰ばね力が両突起部の摺動摩擦力よりも
小さい場合には、可動接触子９は図８の状態で静止し、
引外し機構が動作してクロスバー１４が反時計方向に回
動する。そして、可動接触子９の先端部９ｂが絶縁物の
カバー３の突起部３ａと当接し、クロスバ１４の回動力
が加わって、可動接触子９はクロスバ１４に対して相対
的に時計方向に回動して、突起部９ａが突起部１４ｈの
反対側に移動して図８のトリップの状態となる。When the return spring force is smaller than the sliding frictional force of both projections, the movable contactor 9 stands still in the state of FIG.
The tripping mechanism operates and the crossbar 14 rotates counterclockwise. Then, the tip portion 9b of the movable contact 9 comes into contact with the protrusion 3a of the insulator cover 3, and the turning force of the crossbar 14 is applied, so that the movable contact 9 rotates clockwise relative to the crossbar 14. The protrusion 9a moves to the opposite side of the protrusion 14h, and the trip state of FIG. 8 is reached.
【００３５】この実施例では、可動接触子軸１５の保持
部分が可動接触子９の回動面に平行な溝１４ｂになって
おり、可動接触子軸１５はこの溝に沿って移動するため
に可動接触子９が回動し乍ら可動接触子軸１５の回動面
上を平行移動でき、可動接触子９の突起部９ａがクロス
バー１４の突起部１４ｈ上を摺動して可動接触子９が反
転できる。In this embodiment, the holding portion of the movable contactor shaft 15 is a groove 14b parallel to the rotating surface of the movable contactor 9, and the movable contactor shaft 15 is moved along this groove. When the movable contactor 9 rotates, the movable contactor shaft 15 can move in parallel on the rotating surface of the movable contactor shaft 15, and the protrusion 9a of the movable contactor 9 slides on the protrusion 14h of the crossbar 14 to move the movable contactor. 9 can be reversed.
【００３６】この様な作用をもたらす他の実施例して
は、可動接触子軸の保持はクロスバーに形成される遊び
のない丸孔であって、可動接触子が可動接触子とクロス
バーの突起部の係合量に相当するような平行移動できる
ような遊びを有する可動接触子軸の挿通孔が可動接触子
に形成されているものがある。In another embodiment that brings about such an action, the movable contactor shaft is held by a round hole having no play formed in the crossbar, and the movable contactor is provided between the movable contactor and the crossbar. In some cases, the movable contactor has an insertion hole for the movable contactor shaft that has a play that allows parallel movement corresponding to the amount of engagement of the protrusion.
【００３７】更に他の実施例としては、クロスバーに形
成される可動接触子軸の保持部分と可動接触子に形成さ
れる可動接触子軸の挿通孔の双方に遊びがあって、双方
の遊びの合計が、可動接触子が双方の突起部の係合量に
相当するような平行移動できるように成っているものが
ある。As still another embodiment, there is play in both the holding portion of the movable contactor shaft formed in the crossbar and the through hole of the movable contactor shaft formed in the movable contactor, and there is play in both. In some cases, the movable contactor can move in parallel so as to correspond to the amount of engagement of both protrusions.
【００３８】これらの実施例は回路遮断器に関するもの
であるが、引外し機構や開閉機構のない限流装置にこの
発明による接触子装置を実施することも可能である。Although these embodiments relate to the circuit breaker, it is possible to implement the contact device according to the present invention in a current limiting device having no tripping mechanism or opening / closing mechanism.
【００３９】[0039]
【発明の効果】上述した様に、この発明に依る接触子装
置に短絡電流のような大きな電流が流れた時には、電磁
反発力によって瞬時に可動接触子が固定接触子から開離
し反転して接触子間の開離距離を大きくすることがで
き、電流を瞬時に遮断する。この性能を得るために部品
を増やすことなく、可動接触子と固定部材に突起部を設
けて、可動接触子の回動中心を移動できるようにするだ
けで、容易に且つ簡単に実現でき、小形で高性能で、安
価な回路遮断器を提供することが出来る。As described above, when a large current such as a short-circuit current flows through the contact device according to the present invention, the movable contact is instantly separated from the fixed contact due to the electromagnetic repulsive force, so that the contact is reversed. The separation distance between the children can be increased, and the current is cut off instantly. In order to obtain this performance, it is possible to easily and easily realize by simply providing a protrusion on the movable contact and the fixed member so that the center of rotation of the movable contact can be moved, without increasing the number of parts. It is possible to provide a high-performance, inexpensive circuit breaker.
【図１】従来技術の回路遮断器の側面断面図である。FIG. 1 is a side sectional view of a prior art circuit breaker.
【図２】この発明による一実施例の回路遮断器の側面断
面図である。FIG. 2 is a side sectional view of a circuit breaker according to an embodiment of the present invention.
【図３】図２の回路遮断器の可動接触子をクロスバーに
組み立てた状態を示す平面図である。3 is a plan view showing a state in which the movable contactor of the circuit breaker of FIG. 2 is assembled to a crossbar.
【図４】図３のＡ−Ａ線から見た側面断面図である。FIG. 4 is a side sectional view as seen from the line AA in FIG.
【図５】図２の回路遮断器に短絡電流が流れた時の可動
接触子の動作を説明する図であって、電流が流れる前の
状態を示す図である。5 is a diagram for explaining the operation of the movable contactor when a short-circuit current flows through the circuit breaker of FIG. 2, showing a state before a current flows.
【図６】図２の回路遮断器に短絡電流が流れた時の可動
接触子の動作を説明する図であって、電流が流れた直後
の状態を示す図である。6 is a diagram for explaining the operation of the movable contactor when a short-circuit current flows through the circuit breaker of FIG. 2, showing a state immediately after the current flows.
【図７】図２の回路遮断器に短絡電流が流れた時の可動
接触子の動作を説明する図であって、可動接触子が反転
した状態を示す図である。7 is a diagram for explaining the operation of the movable contactor when a short circuit current flows through the circuit breaker of FIG. 2, and is a diagram showing a state in which the movable contactor is reversed.
【図８】図２の回路遮断器に短絡電流が流れた時の可動
接触子の動作を説明する図であって、開閉機構が動作し
た後の状態を示す図である。8 is a diagram for explaining the operation of the movable contactor when a short-circuit current flows through the circuit breaker of FIG. 2, and is a diagram showing a state after the opening / closing mechanism operates.
１ 回路遮断器 ２ ベース ３ カバー ４ 電源側端子 ５ 固定接触子 ６ 固定接点 ７ 可動接点 ８ 可撓リード ９ 可動接触子 １０ ヒータ １１ 中継端子 １２ 負荷側端子 １３ 可撓リード １４ クロスバー １５ 可動接触子軸 １６ 接圧ばね １７ 固定軸 １８ ハンドル １９ 固定軸 ２０ 爪 ２１ トリップレバー ２２ 第１連結点 ２３ 第１リンク ２４ 第２連結点 ２５ 第３連結点 ２６ 第２リンク ２７ 操作ばね ２９ トリップシャフト ３０ トリップピース ３１ トリップシャフト復帰ばね ３２ バイメタル ３３ 固定コアー ３４ 可動コアー ３５ バイメタル調整ねじ DESCRIPTION OF SYMBOLS 1 Circuit breaker 2 Base 3 Cover 4 Power supply side terminal 5 Fixed contact 6 Fixed contact 7 Movable contact 8 Flexible lead 9 Movable contactor 10 Heater 11 Relay terminal 12 Load side terminal 13 Flexible lead 14 Crossbar 15 Movable contactor Shaft 16 Contact pressure spring 17 Fixed shaft 18 Handle 19 Fixed shaft 20 Claw 21 Trip lever 22 First connection point 23 First link 24 Second connection point 25 Third connection point 26 Second link 27 Operation spring 29 Trip shaft 30 Trip piece 31 Trip Shaft Return Spring 32 Bimetal 33 Fixed Core 34 Movable Core 35 Bimetal Adjustment Screw
Claims (2)
可動接触子、前記可動接触子を軸支する可動接触子軸、
前記可動接触子軸を保持する保持部材から成る接触子機
構において、 前記保持部材と前記可動接触子の双方には前記可動接触
子が前記可動接触子軸の周りを回動した時に互いに当接
可能な突起が形成され、 少なくとも前記保持部材の前記可動接触子軸の保持部分
は前記可動接触子の回動面と平行な方向に遊びをもって
形成されるか、若しくは前記可動接触子の前記可動接触
子軸の挿通孔が遊びをもって形成され、 前記保持部材および前記可動接触子の双方の前記突起部
が当接する方向に前記可動接触子を偏倚するばねが設け
られることを特徴とする接触子装置。1. A fixed contact, a movable contact that comes in contact with and separates from the fixed contact, a movable contact shaft that pivotally supports the movable contact,
In a contactor mechanism including a holding member that holds the movable contactor shaft, both the holding member and the movable contactor can contact each other when the movable contactor rotates around the movable contactor shaft. At least the holding portion of the movable contactor shaft of the holding member is formed with play in a direction parallel to the rotating surface of the movable contactor, or the movable contactor of the movable contactor is formed. A contact device, wherein an insertion hole of the shaft is formed with play, and a spring that biases the movable contact in a direction in which the protrusions of both the holding member and the movable contact come into contact is provided.
記保持部材を回動可能にする開閉操作機構および前記接
触子装置に大電流が流れた時に動作して前記開閉機構を
動作させる引外し機構を有することを特徴とする請求項
１記載の接触子装置。2. The holding member is rotatably supported by a fixed member, and is operated when a large current flows through the opening / closing operation mechanism and the contactor device that allow the holding member to rotate, thereby operating the opening / closing mechanism. The contact device according to claim 1, further comprising a removal mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05206113A JP3096194B2 (en) | 1993-08-20 | 1993-08-20 | Contact device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05206113A JP3096194B2 (en) | 1993-08-20 | 1993-08-20 | Contact device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0757606A true JPH0757606A (en) | 1995-03-03 |
| JP3096194B2 JP3096194B2 (en) | 2000-10-10 |
Family
ID=16518019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05206113A Expired - Fee Related JP3096194B2 (en) | 1993-08-20 | 1993-08-20 | Contact device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3096194B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT502285B1 (en) | 2004-10-19 | 2008-12-15 | Gissing Gerhard | CIRCUIT RING WITH DOUBLE BOLTING DEVICE |
-
1993
- 1993-08-20 JP JP05206113A patent/JP3096194B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3096194B2 (en) | 2000-10-10 |
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