JPS605487Y2 - vacuum switch - Google Patents

Description

【考案の詳細な説明】 本考案は、真空開閉器に関し、特にその主回路導電部の
改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vacuum switch, and particularly to improvements in its main circuit conductive portion.

従来の真空開閉器の主回路導電部は第１図に示す通りで
、がい管５′に取付けられた主回路端子７′と図示しな
い真空バルブの可動接点に接続された可動導体１０′と
を可続性を有するリード線１により接続していた。The main circuit conductive part of a conventional vacuum switch is as shown in FIG. 1, and consists of a main circuit terminal 7' attached to an insulator tube 5' and a movable conductor 10' connected to a movable contact of a vacuum valve (not shown). The connection was made by a lead wire 1 having compatibility.

しかしこのようにリード線により主回路端子と可動導体
とを接続した場合には、図示のようにたるんだリード線
１とがい管５′の内面との間の距離をとるためにがい管
の径を大きくする必要があり、かい管が大型化する欠点
があった。However, when the main circuit terminal and the movable conductor are connected by lead wires in this way, the diameter of the insulator tube 5' is changed to maintain a distance between the slack lead wire 1 and the inner surface of the insulator tube 5' as shown in the figure. This had the disadvantage of increasing the size of the paddle.

また従来の主回路端子は、かい管の取付孔を貫通する胴
部７ａ’と、この胴部７ａ’の外周に設けられたネジに
螺合するナツト７ｇ′と、胴部７ａ’に突設されたネジ
部７ｈ’に螺着された外部端子７ｃ’とからなっていて
がい管５′にバッキングｐを介して取付けられていたた
め部品点数が多くなって高価になるだけでなく、外部端
子７ｃ’のがい管５′の端面からの突出寸法が大きくな
って真空開閉器の軸方向寸法が大きくなる欠点があった
。Furthermore, the conventional main circuit terminal includes a body part 7a' that passes through the mounting hole of the tube, a nut 7g' that is screwed into a screw provided on the outer periphery of this body part 7a', and a nut 7g' that protrudes from the body part 7a'. and an external terminal 7c' screwed onto the threaded part 7h', which is attached to the insulator tube 5' via the backing p, which not only increases the number of parts and increases the cost, but also increases the cost of the external terminal 7c. There is a drawback that the protrusion dimension from the end face of the bulge tube 5' becomes large, and the axial dimension of the vacuum switch becomes large.

尚、リード線１を無くすために、実公昭５３−９８８５
号、実公昭５２−４９０８６号、実公昭５１−５０２８
３号、及び特公昭４４−２８２１６号に見られるように
、真空バルブの可動導体と主回路端子とを、互いに摺動
自在に嵌合し合う摺動結合部により接続したものが提案
されているが、従来のこの種の真空開閉器では、主回路
端子に固定接触子としてのチューリップ形接触子を取付
け、該主回路端子をかい管の取付は孔の内側に固定した
金具にネジ止めしていた。In addition, in order to eliminate lead wire 1,
No., Jitko No. 52-49086, Jitko No. 51-5028
No. 3 and Japanese Patent Publication No. 44-28216, it has been proposed that the movable conductor of the vacuum valve and the main circuit terminal are connected by a sliding joint that fits into each other so as to be able to slide freely. However, in conventional vacuum switches of this type, a tulip-shaped contact as a fixed contact is attached to the main circuit terminal, and the main circuit terminal is screwed to a metal fitting fixed inside the hole. Ta.

しかしながらチューリップ形接触子は多数のフィンガ状
接触子片を円環状に並べて外側から接圧バネにより付勢
する構造であるため、その構造が複雑で組立てが面倒で
あり、また接圧バネを必要とするためその外径が大きく
なって主回路端子付近の径方向寸法が大きくなるのを避
けられなかった。However, the tulip-shaped contact has a structure in which a large number of finger-shaped contact pieces are arranged in an annular shape and is biased from the outside by a contact pressure spring, so the structure is complicated and difficult to assemble, and the contact pressure spring is not required. Therefore, it was inevitable that the outer diameter would increase and the radial dimension near the main circuit terminal would increase.

更に従来のこの種の真空開閉器では、チューリップ接触
子を取付けた主回路端子をかい管に設けた金具に外部か
らネジ止めする必要があったため、気密の保持を図る必
要がある箇所が増え、部品点数が増える上に構造が複雑
になる欠点があった。Furthermore, in conventional vacuum switches of this type, the main circuit terminal with the tulip contact attached had to be screwed from the outside to a metal fitting installed in the pipe, which increased the number of locations that needed to be kept airtight. This has the disadvantage that the number of parts increases and the structure becomes complicated.

尚、上記従来の真空開閉器において、主回路端子をかい
管の取付は孔に固定する金具に一体に設けることも考え
られるが、このようにした場合にはかい管の取付は孔に
固定される金具の内側の空間でチューリップ接触子の組
立て及び取付けを行なう必要がある。In addition, in the above-mentioned conventional vacuum switch, it is possible to install the main circuit terminal integrally with the metal fitting that fixes the tube to the hole, but in this case, the tube is not fixed to the hole. It is necessary to assemble and attach the tulip contact in the space inside the metal fitting.

ところがチューリップ接触子はその構造上狭い空間で組
立てることは困難であるため、このようにした場合には
、かい管の取付は孔の径及び該取付は孔に固定される金
具の径を大きくして該金具の内側に広いスペースを確保
する必要があり、真空開閉器の径方向寸法が大きくなる
のを避けられない。However, it is difficult to assemble the tulip contact in a narrow space due to its structure, so in this case, the diameter of the hole and the diameter of the metal fitting fixed to the hole must be increased to install the tube. Therefore, it is necessary to secure a large space inside the metal fitting, which inevitably increases the radial dimension of the vacuum switch.

また一般に真空開閉器では、真空バルブを取囲むように
配置された真空バルブ駆動用の絶縁筒と該絶縁筒に設け
られて真空バルブの接圧バネと遮断バネとを受止めるバ
ネ受は部材とを備えていて、絶縁筒を外部から適宜の機
構を介して操作することにより可動導体を変位させて真
空バルブを操作ようになっており、真空バルブを開く際
には該絶線筒の操作力を真空バルブの可動導体に伝達す
る必要がある。Generally, in a vacuum switch, an insulating cylinder for driving the vacuum valve arranged to surround the vacuum valve and a spring holder provided on the insulating cylinder to receive the contact pressure spring and the shutoff spring of the vacuum valve are two members. The vacuum valve is operated by displacing the movable conductor by operating the insulating cylinder from the outside through an appropriate mechanism, and when opening the vacuum valve, the operating force of the disconnected cylinder is used. must be transmitted to the movable conductor of the vacuum valve.

ところが従来の真空開閉器では、真空バルブ駆動用の絶
縁筒の操作力を真空バルブの可動導体に伝達するために
該可動導体に特別の部材を取付けて該部材にバネ受は部
材を当接させていたため、部品点数が多くなり、組立て
に手間がかかる欠点があった。However, in conventional vacuum switches, in order to transmit the operating force of the insulating tube for driving the vacuum valve to the movable conductor of the vacuum valve, a special member is attached to the movable conductor, and the spring retainer is brought into contact with the movable conductor. As a result, the number of parts was large and assembly was time-consuming.

本考案の目的は、構造を簡単にして部品点数を少なくし
、軸方向寸法及び径方向寸法の縮小を図った真空開閉器
を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a vacuum switch that has a simple structure, a reduced number of parts, and a reduced axial and radial dimension.

本考案では、上記の目的を達成するため、真空バルブの
可動導体側に雌形の可動接触子を設け、主回路端子側に
該可動接触子に接離する雌形の円柱状固定接触子を設け
て両者を摺動接触させている。In this invention, in order to achieve the above object, a female movable contact is provided on the movable conductor side of the vacuum valve, and a female cylindrical fixed contact that approaches and separates from the movable contact is provided on the main circuit terminal side. The two are brought into sliding contact.

可動接触子は、底部にネジ孔が設けられた有底筒体の周
壁部に軸線方向の割りを入れた構造の自刃接触形の摺動
接触子からなっており、該摺動接触子のネジ孔に可動導
体の先端のネジが螺合されて摺動接触子と可動導体とが
結合されている。The movable contact consists of a self-cutting contact type sliding contact that has a structure in which the peripheral wall of a bottomed cylindrical body with a screw hole is provided at the bottom and an axial slot, and the screw of the sliding contact A screw at the tip of the movable conductor is screwed into the hole to couple the sliding contact and the movable conductor.

また主回路端子は、かい管の端子取付は孔を貫通する胴
部とかい管の外部に突出する外部端子と前記固定接触子
を構成する円柱状接触部とを一体に有し、かい管の端子
取付は孔にセメントにより固着されている。In addition, when attaching the terminal to a paddle tube, the main circuit terminal integrally has a body portion passing through the hole, an external terminal projecting to the outside of the tube, and a cylindrical contact portion constituting the fixed contact. The terminal mounting is fixed in the hole with cement.

更に、可動接触子の端面ば真空バルブを開く際にバネ受
は部材が当接する当接面となっており、特別の部材を設
けることなく、真空バルブ駆動用絶縁筒の操作力を可動
導体に伝達することができるようになっている。Furthermore, the end face of the movable contactor is a contact surface against which a member comes into contact when opening the vacuum valve, and the operating force of the insulating tube for driving the vacuum valve can be transferred to the movable conductor without the need for a special member. It is now possible to communicate.

上記のように主回路端子側に設ける固定接触子を円柱状
に形成すると、主回路端子の構造を一体構造としたこと
と組俟って主回路端子の構造を非常に簡単にすることが
でき、主回路端子の取付けを簡単にすることができる上
に、真空開閉器の径方向寸法及び軸方向寸法の縮小を図
ることができる。If the fixed contact provided on the main circuit terminal side is formed into a cylindrical shape as described above, the structure of the main circuit terminal can be made very simple in combination with the integral structure of the main circuit terminal. In addition to simplifying the attachment of the main circuit terminal, it is possible to reduce the radial and axial dimensions of the vacuum switch.

また上記のように主回路端子を一体構造とした上でセメ
ントによりかい管に固着する構造にすると、気密保持構
造にする箇所を少なくすることができ、構造を簡単にし
て信頼性を高めることができる。In addition, by making the main circuit terminal into an integral structure and fixing it to the cement tube as described above, the number of parts to maintain airtightness can be reduced, simplifying the structure and increasing reliability. can.

更に上記のように真空バルブの可動導体に結合する可動
接触子を自刃接触形の接触子とすると、可動接触子の組
立てを必要とせず、しかも該可動接触子の可動導体への
取付けは可動接触子の底部のネジ孔に可動導体の先端の
ネジを螺合させるだけで行なうことができるので、組立
てを簡単にすることができる。Furthermore, if the movable contact coupled to the movable conductor of the vacuum valve is a self-blade contact type as described above, there is no need to assemble the movable contact, and the attachment of the movable contact to the movable conductor is a movable contact type. This can be done simply by screwing the screw at the tip of the movable conductor into the screw hole at the bottom of the child, which simplifies assembly.

また自刃接触形の摺動接触子は接圧バネを用いないため
その外径を小さく構成することができる。Further, since the self-blade contact type sliding contact does not use a contact pressure spring, its outer diameter can be made small.

従って、真空開閉器のかい管の径方向寸法が増大するの
を防いで真空開閉器の小形化を図ることができる。Therefore, it is possible to prevent the radial dimension of the vacuum switch tube from increasing and to downsize the vacuum switch.

また上記のように、可動接触子の真空バルブ側の端面を
、真空バルブを開く際に絶縁筒が当接する当接面とする
と、絶縁筒の操作力を可動導体に伝達するための部材を
特別に設ける必要がないので、部品点数を削減して構造
を簡単にすることができる。In addition, as mentioned above, if the end face of the movable contact on the vacuum valve side is the contact surface that the insulating tube comes into contact with when opening the vacuum valve, a special member is used to transmit the operating force of the insulating tube to the movable conductor. Since there is no need to provide the same, the number of parts can be reduced and the structure can be simplified.

以下図示の実施例により本考案を詳細に説明する。The present invention will be explained in detail below with reference to the illustrated embodiments.

第２図は本考案の一実施例を示したもので、同図におい
て１はフレーム、２及び３はフレーム１に固着されたリ
ング状の支持板である。FIG. 2 shows an embodiment of the present invention, in which 1 is a frame, and 2 and 3 are ring-shaped support plates fixed to the frame 1.

４及び５はそれぞれ支持板２及び３に当接されるととも
にフレーム１に固定されたがい管で、これらのがい管４
及び５にはそれぞれ主回路端子６及び７が取付けられて
いる。4 and 5 are insulator tubes that are in contact with the support plates 2 and 3, respectively, and are fixed to the frame 1;
and 5 are attached with main circuit terminals 6 and 7, respectively.

がい管４，５及びフレーム１の内側に形成された空間に
は真空バルブ駆動用絶縁筒８が配置され、この絶縁筒は
支持板２及び３の内周面に摺動自在に嵌合されている。An insulating tube 8 for driving a vacuum valve is arranged in the space formed inside the insulator tubes 4, 5 and the frame 1, and this insulating tube 8 is slidably fitted to the inner peripheral surfaces of the support plates 2 and 3. There is.

絶縁筒８の内部には固定接点９ａと可動接点９ｂとを真
空容器９ｃ内に密封して両端から固定端子９ｄ及び可動
端子９ｅを引出した真空バルブ９が収納され、この真空
バルブの固定端子９ｄは主回路端子６の胴部６ａに設け
られた孔６ｂ内に嵌着されている。A vacuum valve 9 with a fixed contact 9a and a movable contact 9b sealed in a vacuum container 9c and a fixed terminal 9d and a movable terminal 9e drawn out from both ends is housed inside the insulating tube 8, and the fixed terminal 9d of this vacuum valve is fitted into a hole 6b provided in the body portion 6a of the main circuit terminal 6.

真空バルブ９の可動端子９ｅには可動導体１０がフラン
ジ付きの継手１１を介して接続されている。A movable conductor 10 is connected to a movable terminal 9e of the vacuum valve 9 via a flanged joint 11.

可動導体１０は、絶縁筒８のがい管５側の端部付近の内
側に嵌着されたバネ受は部材１２に設けられた貫通孔１
２ａをゆるく貫通して主回路端子７の近傍まで延び、摺
動接触子１３を介して主回路端子７に接続されている。The movable conductor 10 has a spring receiver fitted inside the insulating tube 8 near the end on the insulator tube 5 side, and a through hole 1 provided in the member 12.
It loosely penetrates through 2a and extends to the vicinity of the main circuit terminal 7, and is connected to the main circuit terminal 7 via the sliding contact 13.

バネ受は部材１２と真空バルブ９の容器９ｃとの間には
しゃ断バネ１４が配設され、バネ受は部材１２と継手１
１のフランジ部との間には接圧バネ１５が配設されてい
る。A cutoff spring 14 is disposed between the member 12 and the container 9c of the vacuum valve 9, and the spring receiver is connected between the member 12 and the joint 1.
A contact pressure spring 15 is disposed between the flange portion 1 and the flange portion 1 .

絶縁筒８にはまた図示しない操作機構の主軸１６にレバ
ー１７を介して結合され、投入操作時に主軸１６を図面
上反時計方向に回転させると、絶縁筒８が第２図の左方
に変位して接圧バネ１５を介して真空バルブの可動接点
９ｂを固定接点９ａに接触させる。The insulating cylinder 8 is also connected via a lever 17 to a main shaft 16 of an operating mechanism (not shown), and when the main shaft 16 is rotated counterclockwise in the drawing during the closing operation, the insulating cylinder 8 is displaced to the left in Fig. 2. Then, the movable contact 9b of the vacuum valve is brought into contact with the fixed contact 9a via the contact pressure spring 15.

また引外し操作時には投入動作時に蓄勢されたしゃ断バ
ネ１４の力により絶縁筒８が第２図の右方に変位腰バネ
受は部材１２が摺動接触子１３の端面を押して可動接点
９ｂを固定接点９ａから開離させる。In addition, during the tripping operation, the insulating tube 8 is displaced to the right in FIG. It is separated from the fixed contact 9a.

第３図は本考案に係る主回路導電部付近の一構成例を詳
細に示したもので、がい管５の裾部５ａはフランジ付き
の筒状取付金具１８の筒状部１８ａ内に嵌合され、筒状
部１８ａ内に充填されたセメント１９により取付金具１
８に固着されている。FIG. 3 shows in detail an example of the structure near the main circuit conductive part according to the present invention. The mounting bracket 1 is fixed by the cement 19 filled in the cylindrical part 18a.
It is fixed to 8.

尚２０は、取付金具１８とがい管５のフランジ５ｂとの
間に圧縮されて配置されてセメントの流れ止めを図るリ
ング状のパツキンである。Reference numeral 20 denotes a ring-shaped packing that is compressed and arranged between the mounting fitting 18 and the flange 5b of the insulator tube 5 to prevent the flow of cement.

取付金具１８の端面には凹部１８ｂが設けられ、この凹
部に前述の支持板３が嵌合されている。A recess 18b is provided in the end face of the mounting bracket 18, and the above-mentioned support plate 3 is fitted into this recess.

取付金具１８のフランジ部には適宜の個数の取付孔１８
Ｃが設けられており、この取付孔を貫通してフレーム１
に螺入されるボルト（図示せず）により、がい管５がフ
レーム１に取付けられる。An appropriate number of mounting holes 18 are provided in the flange portion of the mounting bracket 18.
C is provided, and the frame 1 is inserted through this mounting hole.
The insulator tube 5 is attached to the frame 1 by bolts (not shown) that are screwed into the frame 1.

がい管５の取付金具１８と反対側の端部には端子取付孔
５Ｃが設けられている。A terminal attachment hole 5C is provided at the end of the insulator tube 5 opposite to the attachment fitting 18.

主回路端子７は、がい管５の端子取付孔５ｃを貫通する
胴部７ａと、端子取付孔５ｃの開口端面５ｄに対向する
フランジ７ｂと、外部に突出する外部端子部７ｃとを一
体的に有しており、外部端子部７ｃには端子金具取付用
のボルトが貫通する孔７ｄが設けられている。The main circuit terminal 7 integrally includes a body portion 7a that passes through the terminal attachment hole 5c of the insulator tube 5, a flange 7b that faces the open end surface 5d of the terminal attachment hole 5c, and an external terminal portion 7c that protrudes to the outside. The external terminal portion 7c is provided with a hole 7d through which a bolt for attaching a terminal fitting passes.

また胴部７ａの端部には固定接触子を構成する円柱状の
接触部７ｅが突設されている。Further, a cylindrical contact portion 7e constituting a fixed contact is protruded from the end of the body portion 7a.

主回路端子の胴部７ａはがい管５の端子取付孔５ｃに嵌
合され、胴部７ａのフランジ７ｂ側の端部にはリング状
部材２１が嵌合されている。The body 7a of the main circuit terminal is fitted into the terminal attachment hole 5c of the insulator tube 5, and the ring-shaped member 21 is fitted to the end of the body 7a on the flange 7b side.

部材２１の外側には更にリング状のパツキン２２が配置
され、部材２１及びパツキン２２はフランジ７ｂに設け
られた凹部７ｆ内に配置されてフランジ７ｂとがい管５
の端面５ｄとの間に圧接されている。A ring-shaped packing 22 is further arranged on the outside of the member 21, and the member 21 and the packing 22 are arranged in a recess 7f provided in the flange 7b, so that the flange 7b and the bushing 5
is pressed into contact with the end surface 5d.

そしてがい管５の端子取付孔５Ｃ内にセメント１９が充
填され、このセメントにより主回路端子７ががい管５に
気密に固着されている。The terminal attachment hole 5C of the insulator tube 5 is filled with cement 19, and the main circuit terminal 7 is hermetically fixed to the insulator tube 5 by this cement.

上記パツキン２２は気密保持用のもので、通常ニトリル
ゴム等からなっている。The gasket 22 is for maintaining airtightness and is usually made of nitrile rubber or the like.

またリング状部材２１はセメント１９に触れても劣化し
ないポリアセタール等の樹脂からなり、この部材２１に
よりセメント１９がパツキン２２に触れるのを阻止して
、パツキンがセメントにより劣化させられるのを防止し
ている。Further, the ring-shaped member 21 is made of a resin such as polyacetal that does not deteriorate even if it comes into contact with the cement 19, and this member 21 prevents the cement 19 from touching the packing 22, thereby preventing the packing from being deteriorated by the cement. There is.

またリング状部材２１はフランジ７ｂとがい管５の端面
５ｄとの間に間隙ｄを保つスペーサとしての機能をも備
えており、このように間隙ｄを保つことによって、熱膨
張によりフランジ７ｂががい管５を押圧して破壊するの
を防止している。The ring-shaped member 21 also has a function as a spacer that maintains a gap d between the flange 7b and the end surface 5d of the insulator tube 5. By maintaining the gap d in this way, the flange 7b is caused to open due to thermal expansion. This prevents the pipe 5 from being pressed and destroyed.

一方真空バルブの可動接点に接続された可動導体１０の
端部には、有底筒体の周壁部１３ａに等間隔で軸線方向
の割り１３ｂを入れることにより周壁部に弾性をもたせ
た構造を有する自刃接触形の摺動接触子１３が取付けら
れる。On the other hand, the end of the movable conductor 10 connected to the movable contact of the vacuum valve has a structure in which the circumferential wall 13a of the bottomed cylinder is provided with axially extending splits 13b at equal intervals to give elasticity to the circumferential wall. A self-blade contact type sliding contact 13 is attached.

図示の例では、可動導体１０の端部にネジ部１０ａが設
けられて、このネジ部が摺動接触子１３の底部に設けら
れたネジ部１３ｃに螺着され、摺動接触子１３の内側底
面に配置された押え板２３が可動導体の端部に螺入され
たボルト２４により締付けられて摺動接触子１３と可動
導体１０とが相互に固定されている。In the illustrated example, a threaded portion 10 a is provided at the end of the movable conductor 10 , and this threaded portion is screwed into a threaded portion 13 c provided at the bottom of the sliding contact 13 . The sliding contact 13 and the movable conductor 10 are fixed to each other by tightening a holding plate 23 disposed on the bottom surface with a bolt 24 screwed into the end of the movable conductor.

摺動接触子１３の先端部内側には突出部１３ｄか形成さ
れ、この突出部に摺動自在に接触するようにして、主回
路端子７の接触部７ｅが摺動接触子１３内に嵌入されて
いる。A protrusion 13d is formed inside the tip of the sliding contact 13, and the contact portion 7e of the main circuit terminal 7 is inserted into the sliding contact 13 so as to be in slidable contact with this protrusion. ing.

尚第２図の実施例においてがい管４側の主回路導電部の
構造は、主回路端子６に真空バルブの固定端子９ｄが摺
動結合部を介することなく直接固定される点を除き、第
３図に示したものとほぼ同様である。In the embodiment shown in FIG. 2, the structure of the main circuit conductive part on the insulator tube 4 side is the same as the structure of the main circuit conductive part on the insulator tube 4 side, except that the fixed terminal 9d of the vacuum valve is directly fixed to the main circuit terminal 6 without using a sliding joint. It is almost the same as that shown in Figure 3.

上記のように真空バルブの可動接点に接続された可動導
体を摺動結合部により主回路端子に接続すると、この摺
動結合部とがい管５の内面との間の距離を大きくとれる
ので、がい管５の径を小さくすることができる。When the movable conductor connected to the movable contact of the vacuum valve is connected to the main circuit terminal by the sliding joint as described above, the distance between the sliding joint and the inner surface of the insulator tube 5 can be increased, so that the The diameter of the tube 5 can be reduced.

また主回路端子７を一体構造としてかい管にセメントに
より固定するようにしたことにより部品点数が少なくな
り、組立工数が減少する。Further, since the main circuit terminal 7 is made into an integral structure and is fixed to the pipe with cement, the number of parts is reduced, and the number of assembly steps is reduced.

更に主回路端子の胴部７ａと外部端子部７ｃとの間にネ
ジ結合部が存在しないので、外部端子部７ｃの突出長を
短くすることができる。Furthermore, since there is no screw joint between the body portion 7a of the main circuit terminal and the external terminal portion 7c, the protrusion length of the external terminal portion 7c can be shortened.

上記の実施例において、主回路端子７は一体成形により
製作してもよく、また複数の部材を溶接等により一体化
することにより製作してもよい。In the embodiments described above, the main circuit terminal 7 may be manufactured by integral molding, or may be manufactured by integrating a plurality of members by welding or the like.

以上のように、本考案によれば、主回路端子側に設ける
固定接触子を円柱状に形成したので、主回路端子を一体
構造としたことと相俟って主回路端子の構造を簡単にす
ることができ、主回路端子の取付けを簡単にすることが
できる上に真空開閉器の径方向寸法及び軸方向寸法の縮
小を図ることができる。As described above, according to the present invention, the fixed contact provided on the main circuit terminal side is formed into a cylindrical shape, which, together with the integral structure of the main circuit terminal, simplifies the structure of the main circuit terminal. This makes it possible to simplify the attachment of the main circuit terminals and to reduce the radial and axial dimensions of the vacuum switch.

また主回路端子が一体構造を有していてセメントにより
かい管に固着されるので、気密保持構造にする箇所を少
なくすることができ、構造を簡単にして信頼性を高める
ことができる。In addition, since the main circuit terminal has an integral structure and is fixed to the tube with cement, the number of parts to be provided with an airtight structure can be reduced, and the structure can be simplified and reliability can be improved.

更に本考案では、真空バルブの可動導体に結合される可
動接触子が自刃接触形の摺動接触子からなっていて、可
動接触子の組立てを必要としないので、組立て工数の削
減を図ることができる。Furthermore, in the present invention, the movable contact coupled to the movable conductor of the vacuum valve is made of a self-blade contact type sliding contact, and there is no need to assemble the movable contact, so the number of assembly steps can be reduced. can.

しかも可動接触子の可動導体への取付けは可動接触子の
底部のネジ孔に可動導体の先端のネジを螺合させるだけ
で行なうことができるので、組立てを簡単にすることが
できる。Moreover, since the movable contact can be attached to the movable conductor by simply screwing the screw at the tip of the movable conductor into the screw hole at the bottom of the movable contact, assembly can be simplified.

また自刃接触形の摺動接触子は接圧バネを要しないため
その径方向寸法を小さくすることができ、かい管の径方
向寸法が大きくなるのを防ぐことができる。Further, since the self-blade contact type sliding contact does not require a contact pressure spring, its radial dimension can be reduced, and the radial dimension of the pipe can be prevented from increasing.

更に可動接触子を構成する摺動接触子の真空バルブ側の
端面を、真空バルブを開く際にバネ受は部材が当接する
当接面としたので、絶縁筒の操作力を可動導体に伝達す
るための部材を特別に設ける必要がなく、部品点数を削
減して構造を簡単にすることができる利点がある。Furthermore, since the end surface of the sliding contact constituting the movable contact on the vacuum valve side is the contact surface against which the spring receiver comes into contact when opening the vacuum valve, the operating force of the insulating tube is transmitted to the movable conductor. There is no need to provide a special member for this, and there is an advantage that the number of parts can be reduced and the structure can be simplified.

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

第１図は従来の真空開閉器の主回路導電部の構造を示す
断面図、第２図は本考案の一実施例を示す断面図、第３
図は本考案の実施例の要部を示す拡大断面図である。 ５・・・・・・がい管、７・・・・・・主回路端子、７
ａ・・・・・・胴部、７ｃ・・・・・・外部端子部、７
ｅ・・・・・・接触部、９・・・・・・真空バルブ、１
０・・・・・・可動導体、１３・・・・・・摺動接触子
、１９・・・・・・セメント。Fig. 1 is a sectional view showing the structure of the main circuit conductive part of a conventional vacuum switch; Fig. 2 is a sectional view showing an embodiment of the present invention;
The figure is an enlarged sectional view showing the main parts of an embodiment of the present invention. 5...Insulator tube, 7...Main circuit terminal, 7
a...Body part, 7c...External terminal part, 7
e...Contact part, 9...Vacuum valve, 1
0...Movable conductor, 13...Sliding contact, 19...Cement.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] かい管と、前記かい管内に配置された真空バルブと、前
記真空バルブの可動接点に結合された可動導体と、前記
かい管の端子取付は孔を貫通して取付けられた主回路端
子と、前記主回路端子に結合された固定接触子と、前記
可動導体に結合されて前記固定接触子に接離する可動接
触子と、前記かい管の内部に前記真空バルブを取囲むよ
うに配置された真空バルブ駆動用絶縁筒と、前記絶縁筒
に取付けられて前記真空バルブの接圧バネと遮断バネと
を受は止めるバネ受は部材とを備えた真空開閉器におい
て、前記可動接触子は底部にネジ孔が設けられた有底筒
体の周壁部に軸線方向の割りを入れた構造の自刃接触形
摺動接触子からなっていて、該摺動接触子のネジ孔に前
記可動導体の先端に設けられたネジが螺合されて前記可
動導体と前記摺動接触子とが結合され、前記主回路端子
は前記端子取付は孔を貫通する胴部と前記かい管の外部
に突出する外部端子と前記固定接触子を構成する円柱状
接触部とを一体に有して前記かい管の端子取付は孔にセ
メントにより固着され、前記摺動接触子の前記真空バル
ブ側の端面ば前記真空バルブを開く際に前記バネ受は部
材が当接する当接面となっていることを特徴とする真空
開閉器。a paddle tube; a vacuum valve disposed within the paddle tube; a movable conductor coupled to a movable contact of the vacuum valve; a fixed contact coupled to the main circuit terminal; a movable contact coupled to the movable conductor to move toward and away from the fixed contact; and a vacuum disposed inside the pipe so as to surround the vacuum valve. In a vacuum switch comprising an insulating cylinder for driving a valve, and a spring support member that is attached to the insulating cylinder and receives and receives a contact pressure spring and a cutoff spring of the vacuum valve, the movable contact has a screw on the bottom. It consists of a self-blade contact type sliding contact having a structure in which an axial cut is made in the peripheral wall of a bottomed cylindrical body provided with a hole, and a screw hole of the sliding contact is provided at the tip of the movable conductor. The movable conductor and the sliding contact are connected to each other by screwing together the movable conductor and the sliding contact. The terminal mounting of the tube is fixed to the hole with cement, and the end face of the sliding contact on the vacuum valve side is fixed to the hole when the vacuum valve is opened. The vacuum switch is characterized in that the spring receiver serves as a contact surface against which a member comes into contact.