JP4669398B2 - Operating rod cover - Google Patents

Operating rod cover Download PDF

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JP4669398B2
JP4669398B2 JP2006006831A JP2006006831A JP4669398B2 JP 4669398 B2 JP4669398 B2 JP 4669398B2 JP 2006006831 A JP2006006831 A JP 2006006831A JP 2006006831 A JP2006006831 A JP 2006006831A JP 4669398 B2 JP4669398 B2 JP 4669398B2
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operating rod
rod cover
movable electrode
cover
insulating
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JP2007188798A (en
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隆一 高橋
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Nippon Kouatsu Electric Co
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Nippon Kouatsu Electric Co
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Description

本発明は、高圧配電線路などの電路区分用に使用される柱上用開閉器に使用される絶縁構成に関するものである。更に詳しくは、開閉器の可動電極を固定電極へ投入又は開放動作させるための動作棒に設ける動作棒カバーの絶縁構造の改良に関するものである。 The present invention relates to an insulating configuration used for a pole switch used for electric circuit division such as a high-voltage distribution line. More specifically, the present invention relates to an improvement in the insulating structure of the operating rod cover provided on the operating rod for making the movable electrode of the switch enter or release the fixed electrode.

ケース入り開閉器内部には電路を形成するために、固定電極と固定電極へ投入又は開放するための可動接触子を備えた可動電極を備えており、前記可動電極には、操作機構に連結した主軸と連結された動作棒が連結接続されている。
In order to form an electric circuit inside the cased switch, it is provided with a movable electrode provided with a fixed electrode and a movable contact for opening or closing the fixed electrode, and the movable electrode is connected to an operation mechanism . An operation rod connected to the main shaft is connected and connected.

一般に主軸は、開閉器内部でアース接続された本体ケースに回転可能に支持されている。そのため、可動電極と連結されている動作棒の絶縁性能が低下すると充電部側の可動電極と大地（主軸）間で耐圧性能が低下し地絡事故となる。そのため、一般には可動電極と主軸間を連結する動作棒は絶縁材料のものを使用しているが、絶縁性能をさらに向上させるために動作棒カバーが設けられている。
Generally, the main shaft is rotatably supported by a main body case that is grounded inside the switch. Therefore, when the insulation performance of the operating rod connected to the movable electrode is lowered, the pressure resistance performance is lowered between the movable electrode on the charging unit side and the ground (main shaft) , resulting in a ground fault. Therefore, in general, an operating rod that connects the movable electrode and the main shaft is made of an insulating material, but an operating rod cover is provided to further improve the insulating performance.

そこで、従来技術においては、動作棒の途中に大型のひだ形状と所定間隔に配置された複数のひだ形状の動作棒カバーを設けている構造の出願がある（特許文献１参照）。 Therefore, in the prior art, there is an application for a structure in which a large pleat shape and a plurality of pleat-shaped operation rod covers arranged at predetermined intervals are provided in the middle of the operation rod (see Patent Document 1).

前記の構成により、複数のひだ形状により沿面距離が長くなることで動作棒カバーの絶縁性能が向上し、大型のひだ形状により可動電極と動作棒を駆動する主軸との空間を遮蔽することで、この間の耐圧性能が向上した。

特開２０００−５７９０９号公報 With the above configuration, the creeping distance is increased by a plurality of pleat shapes, so that the insulation performance of the operating rod cover is improved, and the space between the movable electrode and the main shaft that drives the operating rod is shielded by a large pleated shape, The pressure resistance performance during this period has been improved.

JP 2000-57909 A

しかし、通電状態で可動電極が固定電極より開放するような負荷開閉時には消弧室より発生するアークガス、すなわち導電性粒子が動作棒や動作棒カバーに付着することで、それら表面の絶縁性能が低下することがある。 However, the arc gas generated from the arc extinguishing chamber, that is, conductive particles adhere to the operating rod and the operating rod cover when the load is opened and closed so that the movable electrode opens from the fixed electrode in the energized state. There are things to do.

また、落雷等の影響により電線電路から開閉器内部にサージ電流が侵入し相間や大地間での短絡事故が発生し、そのアーク熱で開閉器内部が溶損することがある。特に樹脂材料やゴム材料等の有機材料を用いた部品においては表面が炭化による絶縁性能低下となる。通常、開閉器内部の短絡事故時には変電所の遮断機が一端開放されることで、電路を流れる電流は一時遮断されるが、所定時間経過後には再度変電所の遮断機が投入状態となり電流が供給される。その時、先の短絡事故により動作棒や動作棒カバーの表面が溶損により炭化され絶縁抵抗が下がった状態で、再度遮断機が投入されると開閉器内部で再び短絡事故が発生するため、再短絡事故の発生防止が課題となった。 In addition, a surge current may enter the switch from the electric cable path due to lightning strikes, etc., causing a short circuit between the phases and the ground, and the arc heat may cause the switch to melt. In particular, in parts using organic materials such as resin materials and rubber materials, the insulation performance deteriorates due to carbonization of the surface. Normally, when a short circuit accident occurs inside the switch, the substation circuit breaker is opened once, so that the current flowing through the circuit is temporarily interrupted, but after a predetermined time, the substation circuit breaker is turned on again and the current is Supplied. At that time, if the surface of the operating rod or the operating rod cover is carbonized due to melting and the insulation resistance is lowered due to the previous short circuit accident, if the circuit breaker is turned on again, a short circuit accident will occur again inside the switch. Preventing the occurrence of short-circuit accidents has become an issue.

さらに、沿面距離を伸ばすために設けられたひだ形状は、設計的に動作棒周辺に対して余分な空間が必要となり、開閉器を省スペース化することが困難でもあった。
Furthermore, the pleat shape provided to increase the creepage distance requires an extra space around the operating rod in terms of design, and it is difficult to save the space for the switch.

本発明においては上記のように負荷開閉や開閉器内部の短絡事故発生においても、可動電極と対地間での絶縁性能を向上させるために、請求項１の発明においては、本体ケース２の内部には固定電極３と、前記固定電極３へ投入又は開放するための可動電極４と、操作機構に連結された主軸１０と、主軸１０と一体の駆動アーム９と、前記可動電極４の可動接触子１２と前記駆動アーム９とを連結するための絶縁材料からなる短冊形の動作棒７と、さらに前記動作棒７には動作棒カバー８とを備えた開閉器１において、
前記動作棒カバー８は難燃性のゴム材料で形成され内部が中空の略立方体形状からなり、前記動作棒カバー８には前記動作棒７の表面に密着取付するための挿通穴８ｆと、さらに前記動作棒７の周囲には前記動作棒カバー８により前記動作棒７との間で細隙空間8ｄを形成する絶縁部８ｃを設けたことを特徴とする動作棒カバーであり、請求項２の発明においては、前記挿通穴８ｆは角穴形状からなりその長辺８ｅは前記動作棒７を挟持するために内側へ湾曲したことを特徴とする請求項１の動作棒カバーである。
In the present invention, in order to improve the insulation performance between the movable electrode and the ground even in the event of a load switching or a short circuit accident inside the switch as described above, in the invention of claim 1, Is a fixed electrode 3, a movable electrode 4 to be inserted into or released from the fixed electrode 3, a main shaft 10 connected to an operation mechanism , a drive arm 9 integral with the main shaft 10, and a movable contact of the movable electrode 4 . In the switch 1 provided with a strip-shaped operation rod 7 made of an insulating material for connecting the motor 12 and the drive arm 9, and an operation rod cover 8 on the operation rod 7.
The operating rod cover 8 is formed of a flame-retardant rubber material and has a substantially cubic shape with a hollow inside. The operating rod cover 8 has an insertion hole 8f for tightly attaching to the surface of the operating rod 7; The operating rod cover according to claim 2, wherein an insulating portion 8c is provided around the operating rod 7 so as to form a slit space 8d between the operating rod cover 8 and the operating rod 7 . In the present invention, the insertion hole 8f is an action rod cover according to claim 1, wherein the insertion hole 8f has a square hole shape, and a long side 8e thereof is curved inward to sandwich the action rod 7.

上記発明の動作棒カバー構造により動作棒と動作棒カバーの間には細隙空間を設けたことで、負荷開閉時や開閉器内部の短絡事故が発生した場合においても前記細隙空間部分の汚損や溶損が防止されることで、絶縁箇所が確保でき絶縁性能を保つことができる。 Due to the operating rod cover structure of the above invention, a slit space is provided between the operating rod cover and the operating rod cover, so that the slit space portion can be soiled even when a load is opened or closed or when a short circuit accident occurs inside the switch. In addition, by preventing melting damage, an insulating portion can be secured and insulation performance can be maintained.

また、動作棒カバー表面に複数のひだ形状を追加しなくとも細隙空間を設けることで沿面距離を長く確保できるために、省スペースで絶縁性能を確保することが出来る。
In addition, since the creepage distance can be secured long by providing the slit space without adding a plurality of pleat shapes on the surface of the operating rod cover, the insulation performance can be secured in a small space .

それにより、開閉器全体の小型化が達成できることで作業者の操作性も向上する。
Thereby, the miniaturization of the entire switch can be achieved, and the operability for the operator is also improved.

発明を実施するための最良の形態を図に基づいて説明する。
図１乃至図５は、本発明の実施例を示す。 The best mode for carrying out the invention will be described with reference to the drawings.
1 to 5 show an embodiment of the present invention.

図１に示すように開閉器１は、上面が開口し有底の金属材料からなる、例えばステンレス板や鋼板からなる本体ケース２を有し、該本体ケース２内部には１相毎に分割された絶縁性を有する樹脂材料、例えばエポキシ樹脂や不飽和ポリエステェルからなる絶縁ケース１４が３層設けられ、鋼板からなる台板５にネジにて固定されている。また、台板５は本体ケース２に対してネジにより固定されている。 As shown in FIG. 1, the switch 1 has a main body case 2 made of a metal material with an open top and made of a bottom, for example, a stainless steel plate or a steel plate. The main body case 2 is divided into phases. Three insulating cases 14 made of an insulating resin material such as an epoxy resin or unsaturated polyester are provided, and are fixed to the base plate 5 made of a steel plate with screws. The base plate 5 is fixed to the main body case 2 with screws.

絶縁ケース１４は上部が開口した略長方形の箱形状にて形成されており、絶縁ケース１４の内部には固定電極３、可動電極４が設けられている。
また、絶縁ケース１４の両側壁部には表裏を貫通する貫通穴１４ｂ、１４ｂが設けられ、貫通穴１４ｂ、１４ｂと同心円状で二重に形成された突出壁１４ａ、１４ａを有している。
なお、後述するブッシング６、６を本体ケースに取付けた時、２重に形成された該突出壁１４ａ、１４ａの間にブッシング６、６が入り込み、固定電極３や可動電極４の充電部と本体ケース２との空間絶縁距離が長くなることでブッシング６、６との接続部での絶縁性能が向上する。
The insulating case 14 is formed in a substantially rectangular box shape with an upper opening, and a fixed electrode 3 and a movable electrode 4 are provided inside the insulating case 14.
Further, through holes 14b, 14b penetrating the front and back are provided on both side walls of the insulating case 14 , and projecting walls 14a, 14a are formed concentrically with the through holes 14b, 14b .
When the bushings 6 , 6 to be described later are attached to the main body case, the bushings 6, 6 enter between the projecting walls 14a, 14a formed double, and the charging portion of the fixed electrode 3 or the movable electrode 4 and the main body Since the space insulation distance with case 2 becomes long, the insulation performance in the connection part with bushings 6 and 6 improves.

貫通穴１４ｂ、１４ｂには固定電子極部３、可動電極部４からそれぞれに電気的に接合された導電材料からなる接続導電体１５、１５Ａがそれぞれ挿通して固定されている。固定電極側及び可動電極側の接続導電体１５、１５Ａは絶縁ケース１４の側壁部を貫通して設けられ、絶縁ケース１４より外側へ突出したそれぞれの先端は、接続部１３、１３を介して後述するブッシング６、６の導電体６ａ、６ａに接続される。なお、接続導電体１５、１５Ａは銅材の導電材料で形成され、平行な２つの面で形成された接触面に対し後述の固定接触子１５ａと可動接触子１２とが接続されている。
Through holes 14b, fixed electronic pole portion 3 to 14b, connecting conductors 15,15A that each of the movable electrode portion 4 made of electrically joined conductive material is fixed by inserting respectively. The connection conductors 15 and 15A on the fixed electrode side and the movable electrode side are provided so as to penetrate through the side wall portion of the insulating case 14, and the respective tips protruding outward from the insulating case 14 are described later via the connection portions 13 and 13. Are connected to the conductors 6a, 6a of the bushings 6, 6. The connection conductors 15 and 15A are made of a copper conductive material, and a fixed contact 15a and a movable contact 12 described later are connected to a contact surface formed by two parallel surfaces.

固定電極３には電極開放時に発生するアークを消弧するために、アーク熱により熱分解し消弧性ガスを発生するユリア樹脂やポリアセタール樹脂材料からなる消弧室１１が、固定接触子１５ａを覆うように設けられている。
 In order to extinguish the arc generated when the electrode is opened, the fixed electrode 3 is provided with an arc extinguishing chamber 11 made of urea resin or polyacetal resin material that is pyrolyzed by arc heat to generate arc extinguishing gas. It is provided to cover.

可動電極部４には可動接触子１２が構成され、図１や図２に示すように湾曲する逆Ｖ字形状に形成されている。可動接触子１２は２枚の板状部材で股状に形成されており、板状部材は平行に配設され、接続導電体１５Ａの接触平面を狭持し、接続導電体１５Ａに貫通されたピンに対して回転可能に支持されている。 A movable contact 12 is formed on the movable electrode portion 4 and is formed in an inverted V shape that is curved as shown in FIGS. The movable contact 12 is formed of two plate-like members in a crotch shape, the plate-like members are arranged in parallel, hold the contact plane of the connection conductor 15A, and penetrate the connection conductor 15A. The pin is rotatably supported with respect to the pin.

この可動接触子１２の回転支点部１２ａにあるピンと同軸上に図示しないコイルバネが圧縮された状態で配設され、この付勢力により所定の圧力で狭持している。 A coil spring (not shown) is arranged in a compressed state coaxially with the pin on the rotation fulcrum 12a of the movable contact 12, and is held at a predetermined pressure by this biasing force.

また、可動電極４の２枚の板状部材で構成された保持部には絶縁性樹脂材料で強度のある例えばエポキシ樹脂やＦＲＰ等からなる短冊形の動作棒７がピン接合されており、動作棒７には後述する動作棒カバー8が貫通して設けられている。また動作棒７の他端は後述する駆動リンク９にピン接合されている。
In addition, a strip-shaped operating rod 7 made of, for example, an epoxy resin or FRP, which is made of an insulating resin material and is strong, is pin-bonded to the holding portion formed of the two plate-like members of the movable electrode 4 and operates. The rod 7 is provided with an operating rod cover 8 which will be described later. The other end of the operating rod 7 is pin-joined to a drive link 9 described later.

固定電極３や可動電極４には断面形状がＬ字の導電材料からなる補助電極３ａ、４ａが前記電極と接続し絶縁ケース１４内部に設けられており、補助電極の対向した下面には検電部３ｂ、４ｂを設けている。
 The fixed electrode 3 and the movable electrode 4 are provided with auxiliary electrodes 3a and 4a made of a conductive material having an L-shaped cross-section, connected to the electrodes, and provided inside the insulating case 14, and a voltage detection circuit is provided on the lower surface of the auxiliary electrode. Parts 3b and 4b are provided.

操作機構は、可動接触子１２を回転させるための主軸１０と、操作ハンドルの動作に連動した機構部からなる。絶縁ケース１４下方の切欠部に位置する部位には、金属材料からなる導電性の主軸１０が台板５に回転可能に支持されている。主軸１０には絶縁材料の例えばエポキシ樹脂からなる駆動リンク９が一体に形成されている。この構成により、充電側の可動電極４と接地側の主軸１０とは電気的に絶縁されている。また、主軸１０は図示しない本体ケースに固定された操作機構を介して本体ケース２の外面に設けた操作ハンドルに連結されている。

 The operation mechanism includes a main shaft 10 for rotating the movable contact 12 and a mechanism portion that is linked to the operation of the operation handle. A conductive main shaft 10 made of a metal material is rotatably supported by the base plate 5 at a portion located in the notch portion below the insulating case 14. The main shaft 10 is integrally formed with a drive link 9 made of an insulating material such as epoxy resin. With this configuration, the movable electrode 4 on the charging side and the main shaft 10 on the ground side are electrically insulated. The main shaft 10 is coupled to an operation handle provided on the outer surface of the main body case 2 through an operation mechanism fixed to the main body case (not shown).

上記構成により、図示しない操作ハンドルを回転操作することで、操作機構のリンク機構を介して主軸１０が回動し、駆動リンク９、動作棒７を介して可動接触子１２が可動接触子側の接続導電体１５Ａの回転支点部１２ａを中心として回動し、可動接触子１２の先端部を固定接触子１５ａの図示しない間に挿入したり、開放したりする操作が行える。

With the above configuration, when the operation handle (not shown) is rotated, the main shaft 10 is rotated via the link mechanism of the operation mechanism, and the movable contact 12 is moved to the movable contact side via the drive link 9 and the operation rod 7. The connection conductor 15A rotates about the rotation fulcrum portion 12a, and the tip of the movable contact 12 can be inserted or opened between the fixed contacts 15a (not shown).

ブッシング６、６は本体ケース２の両側面からそれぞれ貫装取付されており、絶縁性の樹脂材料や磁器で例えばエポキシ樹脂や磁器からなるブッシング６、６の中央部に、導電性の導電体６ａ、６ａが一体で形成されている。
The bushings 6, 6 are respectively attached to both sides of the main body case 2 and are made of an insulating resin material or porcelain, and a conductive conductor 6a at the center of the bushings 6 , 6 made of, for example, epoxy resin or porcelain. , 6a are integrally formed.

また、ブッシング６、６の中央部に設けられた導電体６ａ、６ａの先端部には、図１に示すように中空状のパイプ形状に形成された導電材料からなる接続部１３、１３を設けている。
Further, as shown in FIG. 1, connecting portions 13 and 13 made of a conductive material formed in a hollow pipe shape are provided at the distal ends of the conductors 6a and 6a provided at the center of the bushings 6 and 6, respectively . ing.

上記構成により、固定接触子側のブッシング６及び可動接触子側のブッシング６を周知の方法により本体ケース２にそれぞれ貫装取付することで、ブッシング６、６の導電体６ａ、６ａはそれぞれ接続部１３、１３に圧入嵌合されて、固定電極３側の接続導電体１５と可動電極４側の接続導電体１５Ａにそれぞれ電気的に接続される。
With the above structure, the bushing 6 and the bushing 6 of the movable contact terminal side of the fixed contact terminal side by respectively fitted through the mounting to the main body casing 2 by a known method, the conductor 6a of the bushing 6 and 6, respectively 6a connecting portion 13 is press fit into each connection conductor 15A of the fixed electrode 3 side of the connecting conductor 15 and the movable electrode 4 side are electrically connected.

次に図２乃至図５に示す動作棒カバー８について説明する。動作棒カバー８は動作棒７の途中に固定されており、絶縁材料の難燃性を有するブチレンゴムやＥＰゴム等からなり、概略は略立方体形状の本体部に略長方形状をしたつば部８ｂを設けた形状をしている。  Next, the operation rod cover 8 shown in FIGS. 2 to 5 will be described. The operation rod cover 8 is fixed in the middle of the operation rod 7, and is made of butylene rubber, EP rubber, or the like, which is an insulative material, and has a generally rectangular body portion 8b. The shape is provided.

つば部８ｂは図３に示すように本体部上部で周囲に一体的に突出するように設けられており、その平面形状は図４（ａ）に示すように略長方形で長辺は本体部の幅より長く設定されている。このつば部８ｂは負荷開閉時に発生するアークガスによる本体部とつば部８ｂの下面の接続部近辺の汚損を防ぎ、さらに動作棒カバー８の表面の沿面距離を伸ばす効果がある。
As shown in FIG. 3, the collar portion 8b is provided so as to protrude integrally around the upper portion of the main body, and its planar shape is substantially rectangular as shown in FIG. It is set longer than the width. The collar portion 8b has an effect of preventing the vicinity of the connection portion between the main body portion and the lower surface of the collar portion 8b from being generated by arc gas generated when the load is opened and closed, and further increasing the creepage distance on the surface of the operation rod cover 8.

同カバー8は、図３のように動作棒７に対してその挿通密着して圧入装着するために短冊形の動作棒７の断面形状より狭い角穴からなる取付用の挿通穴８ｆと、動作棒７の汚損を防ぐための動作棒７の断面形状より大きい内面を有する絶縁部８ｃから構成されており、動作棒カバー８を絶縁部８ｃの開放側を下方になるように動作棒７へ取付けた時には、絶縁部８ｃは動作棒７へは密着せず同棒7との間で細隙空間8ｄが形成されるように構成されている。
The cover 8, the insertion hole 8f for mounting consisting of narrower square hole than the cross-sectional shape of the operation lever 7 of the strip-shaped in order to press-fit mounted in the through close contact with the operation rod 7 as shown in FIG. 3, the operation is composed of an insulating portion 8c having a larger inner surface than the cross-sectional shape of the motion bar 7 for preventing fouling of the bar 7, mounted to the open side of the operation rod cover 8 insulating section 8c to the operating rod 7 so that the lower In this case, the insulating portion 8c is not in close contact with the operating rod 7, and a slit space 8d is formed between the insulating portion 8c and the operating rod 7.

そのため、動作棒７や動作棒カバー８は負荷開閉により発生する導電性粒子の付着や短絡事故による開閉器１内部の溶損での表面炭化での絶縁性能が低下するのは避けられないものの、動作棒７と動作棒カバー８により形成された細隙空間8ｄの汚損（導電性粒子の付着や溶損）されない箇所により可動電極部４と主軸１０との絶縁性能が確保されることで大地間での短絡事故や、変電所の遮断機の再投入時における再短絡事故が発生しない。
Therefore, although the operating rod 7 and the operating rod cover 8 are unavoidably deteriorated in insulation performance due to surface carbonization due to adhesion of conductive particles generated due to opening and closing of the load and melting inside the switch 1 due to a short circuit accident, The insulation between the movable electrode portion 4 and the main shaft 10 is ensured by the location where the slit space 8d formed by the operating rod 7 and the operating rod cover 8 is not fouled (adhesion or melting of conductive particles). There will be no short circuit accidents at the power station or re-short circuit accidents when the substation circuit breaker is turned on again.

なお、取付用の角穴形状の挿通穴８ｆの長辺部は、動作棒７と密着するように内側に向けて湾曲する形状を有している。上記挿通穴８ｆの構成により、図3に示すように動作棒７と動作カバー８は隙間なく確実に密着されるため確実に絶縁性能が確保出来、而も動作棒７の組立作業性が向上する。なお、動作棒７と動作棒カバー８の接着部にエポキシ系の接着剤を用いても良い。
In addition, the long side part of the insertion hole 8 f having a square hole shape for mounting has a shape that curves inward so as to be in close contact with the operating rod 7. With the above configuration through hole 8f, the operation cover 8 and operation rods 7 as shown in Figure 3 can be secured reliably insulation performance to be in close contact reliably with no gap also improves the assembling workability of the operation rod 7 Thus . Note that an epoxy-based adhesive may be used for the bonding portion between the operating rod 7 and the operating rod cover 8.

次に動作棒カバー８による絶縁について説明する。
電路途中に設置されている開閉器１は電線に流れる電流が定格電流値内であれば、通電状態でも電路を区分するために開閉器１の可動電極４を開放することがある。この時、固定電極３と可動電極４の間でアークが発生し、可動接触子１２の先端や固定接触子１５ａが溶損することで導電性粒子が開閉器１の内部を漂い、動作棒７、動作棒カバー８や駆動リンク９の表面に付着し絶縁性能が低下する。
Next, the insulation by the operation rod cover 8 will be described.
The switch 1 installed in the middle of the electric circuit may open the movable electrode 4 of the switch 1 in order to distinguish the electric circuit even in the energized state if the current flowing through the electric wire is within the rated current value. At this time, an arc is generated between the fixed electrode 3 and the movable electrode 4, the conductive particles drifting inside the switch 1 at the distal end and the fixed contact 15a of the movable contact 12 is melting, the operation rod 7, It adheres to the surfaces of the operating rod cover 8 and the drive link 9 and the insulation performance is lowered.

絶縁性能が低下した場合、可動電極部４とアース接続されている本体ケース２内の台板５を介して支持された主軸１０までの絶縁性能が低下する。そのため、次に可動電極部４を投入し可動電極部４に電流が流れた時には電流が動作棒７から駆動リンク９を介して主軸１０へ流れ対地間で短絡事故となる場合がある。 When insulation performance falls, the insulation performance to the main axis | shaft 10 supported via the base plate 5 in the main body case 2 connected to the movable electrode part 4 by earthing falls. For this reason, when the movable electrode portion 4 is inserted next and a current flows through the movable electrode portion 4, the current flows from the operating rod 7 to the main shaft 10 via the drive link 9, which may cause a short circuit between the ground and the ground.

図４に示す動作棒カバー８を装着することで、可動電極４の開放動作により発生したアークによる導電性粒子は、密閉された開閉器１内部を漂い動作棒７や動作棒カバー８の表面に付着するが、動作棒カバー８の絶縁部８ｃにより形成された細隙空間8ｄには導電性粒子が入り込まない。つまり、導電性粒子は消弧室１１より上部へ吹き上げられるが、絶縁部８ｃの開口部は下方に向いているため、密閉された開閉器１であっても細隙空間８ｄには侵入しない状態となっている。
By attaching the operating rod cover 8 shown in FIG. 4, the conductive particles due to the arc generated by the opening operation of the movable electrode 4 drift inside the sealed switch 1 and are on the surfaces of the operating rod 7 and the operating rod cover 8 . Although it adheres, the conductive particles do not enter the slit space 8d formed by the insulating portion 8c of the operating rod cover 8. That is, although the conductive particles are blown upward from the arc extinguishing chamber 11, the opening of the insulating portion 8c faces downward, so that the sealed switch 1 does not enter the slit space 8d. It has become.

上記の理由により、動作棒７の表面と動作棒カバー８内面には導電性粒子が付着しない細隙空間8ｄを有し、さらにその細隙空間8ｄにおいては動作棒７と動作棒カバー８とが接触していないため絶縁性能が確保され、充電部側の可動電極４と接地側の主軸１０との間での短絡事故が発生することがない。
For the above reasons, it has a surface and operating the rod cover 8 inner surface not adhering conductive particles slit space 8d of operating rod 7, further the operation rod 7 is in its slit space 8d and the operation rod cover 8 Since they are not in contact, insulation performance is ensured, and no short circuit accident occurs between the movable electrode 4 on the charging unit side and the main shaft 10 on the ground side .

本発明の実施例においては、動作棒カバー８内側の絶縁部８ｃにおいては平面状態となっているが、本目的を達するためにはこれに限らず、動作棒カバー８内側の絶縁部８ｃの平面部に凹凸を設けてもかまわない。
In the embodiment of the present invention, the insulating portion 8c inside the operating rod cover 8 is in a flat state. However, the present invention is not limited to this, and the plane of the insulating portion 8c inside the operating rod cover 8 is not limited thereto. Irregularities may be provided on the part.

本発明の動作棒カバーが使用された開閉器の断面図Sectional drawing of the switch using the operation | movement rod cover of this invention 動作棒カバー周辺の詳細図Detailed view around the operating rod cover 図２におけるＢ−Ｂ断面図BB sectional view in FIG. 本発明の動作棒カバー（ａ）平面図 （ｂ）正面図 （Ｃ）右側面図Operation rod cover of the present invention (a) Plan view (b) Front view (C) Right side view 本発明の動作棒カバーの断面図Sectional view of the operating rod cover of the present invention

符号の説明Explanation of symbols

１ 開閉器
２ 本体ケース
３ 固定電極
４ 可動電極
５ 台板
６ ブッシング
７ 動作棒
８ 動作棒カバー
８ｃ 絶縁部
８ｄ 細隙空間
８ｅ 長辺
８ｆ 挿通穴
９ 駆動リンク
１０ 主軸
１２ 可動接触子
1 Switch 2 Body case
3 fixed electrodes
4 Movable electrode 5 Base plate 6 Bushing 7 Operation rod 8 Operation rod cover
8c Insulation part
8d slit space
8e Long side
8f Insertion hole 9 Drive link 10 Spindle
12 Movable contact

Claims (2)

本体ケース（２）の内部には固定電極（３）と、前記固定電極（３）へ投入又は開放するための可動電極（４）と、操作機構に連結された主軸（１０）と、主軸（１０）と一体の駆動リンク（９）と、前記可動電極（４）の可動接触子（１２）と前記駆動リンク（９）とを連結するための絶縁材料からなる短冊形の動作棒（７）と、さらに前記動作棒（７）には動作棒カバー（８）とを備えた開閉器（１）において、
前記動作棒カバー（８）は難燃性のゴム材料で形成され内部が中空の略立方体形状からなり、前記動作棒カバー（８）には前記動作棒（７）の表面に密着取付するための挿通穴（８ｆ）と、さらに前記動作棒（７）の周囲には前記動作棒カバー（８）により前記動作棒（７）との間で細隙空間（8ｄ）を形成する絶縁部（８ｃ）を設けたことを特徴とする動作棒カバー。 Inside the main body case (2), there are a fixed electrode (3), a movable electrode (4) to be inserted into or released from the fixed electrode (3), a main shaft (10) connected to an operating mechanism , and a main shaft ( 10) a drive link (9) integral with the movable electrode (4) , and a strip-shaped operation rod (7) made of an insulating material for connecting the movable contact (12) of the movable electrode (4 ) and the drive link (9 ). And a switch (1) further comprising an operating rod cover (8) on the operating rod (7),
The operating rod cover (8) is formed of a flame-retardant rubber material and has a substantially cubic shape with a hollow inside. The operating rod cover (8) is attached to the surface of the operating rod (7) in close contact with the operating rod cover (8). An insulating portion (8c) that forms a slit space (8d) between the insertion hole (8f) and the operation rod (7) by the operation rod cover (8) around the operation rod (7 ). An operating rod cover characterized by providing. 前記挿通穴（８ｆ）は角穴形状からなりその長辺（８ｅ）は前記動作棒（７）を挟持するために内側へ湾曲したことを特徴とする請求項１の動作棒カバー。 The operating rod cover according to claim 1, wherein the insertion hole (8f) has a square hole shape, and a long side (8e) thereof is curved inward to sandwich the operating rod (7).
JP2006006831A 2006-01-14 2006-01-14 Operating rod cover Active JP4669398B2 (en)

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Publication number Priority date Publication date Assignee Title
US8482213B1 (en) 2009-06-29 2013-07-09 Panasonic Corporation Electronic ballast with pulse detection circuit for lamp end of life and output short protection
US8947020B1 (en) 2011-11-17 2015-02-03 Universal Lighting Technologies, Inc. End of life control for parallel lamp ballast

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5714336U (en) * 1980-06-26 1982-01-25
JPH09147700A (en) * 1995-11-21 1997-06-06 Fuji Electric Co Ltd Vacuum circuit-breaker
JP2003297193A (en) * 2002-04-03 2003-10-17 Togami Electric Mfg Co Ltd Switch

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5714336U (en) * 1980-06-26 1982-01-25
JPH09147700A (en) * 1995-11-21 1997-06-06 Fuji Electric Co Ltd Vacuum circuit-breaker
JP2003297193A (en) * 2002-04-03 2003-10-17 Togami Electric Mfg Co Ltd Switch

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