JPH0439625Y2 - - Google Patents
Info
- Publication number
- JPH0439625Y2 JPH0439625Y2 JP1986062523U JP6252386U JPH0439625Y2 JP H0439625 Y2 JPH0439625 Y2 JP H0439625Y2 JP 1986062523 U JP1986062523 U JP 1986062523U JP 6252386 U JP6252386 U JP 6252386U JP H0439625 Y2 JPH0439625 Y2 JP H0439625Y2
- Authority
- JP
- Japan
- Prior art keywords
- bushing
- case
- protruding
- tip
- packing
- 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.)
- Expired
Links
- 238000012856 packing Methods 0.000 claims description 15
- 239000004020 conductor Substances 0.000 claims description 12
- 239000012212 insulator Substances 0.000 description 9
- 239000002184 metal Substances 0.000 description 7
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 229920000877 Melamine resin Polymers 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Gasket Seals (AREA)
- Insulators (AREA)
- Insulating Bodies (AREA)
Description
【考案の詳細な説明】
イ 考案の目的
イ−１ 産業上の利用分野
本考案は高圧配電線路において使用する気中開
閉器等に使用されるブツシング用パツキンの改良
に係り、特にブツシングと消弧室との間の密着性
を高めるようにしたゴムパツキンに関する。[Detailed description of the invention] A. Purpose of the invention A-1. Industrial application field The present invention relates to the improvement of bushing packing used in air switches, etc. used in high-voltage distribution lines. This invention relates to a rubber gasket that improves the adhesion between the chamber and the chamber.
イ−２ 従来技術
高圧配電線路には柱上用気中開閉器が線路の区
分用あるいは分岐用開閉器として使用されてい
る。A-2 Prior Art Pole-mounted aerial switches are used on high-voltage distribution lines as line segmentation or branching switches.
該開閉器は周知のように中心導体を挿通固定し
たブツシングをケースに貫装して取付け、そのケ
ース内側に位置するブツシングの中心導体には固
定電極を取付け、さらにその固定電極の外周を覆
うようにして細隙消弧室を備えるようにしてい
る。 As is well known, the switch is installed by penetrating the case with a bushing in which a center conductor is inserted and fixed, a fixed electrode is attached to the center conductor of the bushing located inside the case, and a bushing is installed to cover the outer periphery of the fixed electrode. A slit arc extinguishing chamber is provided.
そしてさらに、上記のブツシングの突出部と細
隙消弧室の開口部との間にはさらにゴムパツキン
を介在させて両者間に間隙が形成されないように
している。 Further, a rubber packing is further interposed between the protrusion of the bushing and the opening of the narrow arc extinguishing chamber to prevent a gap from being formed therebetween.
イ−３ 本考案が解決しようとする問題点
ところで、従来においては、振動や衝撃等が加
わつたりすると同ブツシングと消弧室との間に介
在したゴムパツキンがこれらとの密着性（取付状
態）が悪いために簡単に動いたり、外れたりして
両者間に間隙が形成される。そしてかかる状態で
雷サージ等の異常電圧が侵入するとこの形成され
た間隙を経て充電側の固定電極とアース側のケー
スとの間で閃絡（地絡）事故を起こしたりするこ
とがあつた。A-3 Problems to be solved by the present invention By the way, in the past, when vibrations, shocks, etc. Because of the poor quality, they can easily move or come off, creating a gap between them. If an abnormal voltage such as a lightning surge enters in such a state, a flash fault (ground fault) may occur between the fixed electrode on the charging side and the case on the ground side through the gap formed.
ロ−１ 考案の構成
ロ−１ 問題点を解決するための手段
本考案はこのような従来形パツキンの持つ密着
性（取付）の悪さの問題を解決して上記閃絡事故
を防止中心導体３を挿通固定してなるブツシング
１をケース２に貫装しさらにケース２内に位置す
る上記ブツシング１の内方側には上記中心導体３
に対し固定電極１６を取付けさらに該固定電極１
６の外周を覆うようにして細隙消弧室１７を取付
け而も上記ブツシング１の内方側の突出部１ｄの
先端１ｆと対向する細隙消弧室１７の開口部１７
ａの突出端１７ｂとの間にはブツシング用パツキ
ン１９を介在させて両者間の気密を保持するよう
にしたものにおいて、上記パツキン１９は、ブツ
シング１の突出部１ｄの先端１ｆと細隙消弧室１
７の開口部１７ａの突出端１７ｂとにそれぞれ密
着嵌合する環状の溝部１９ａ，１９ｂを表裏一体
に形成すると共にさらに最内周部に位置して上記
溝部１９ａを構成すると同時にケース２の内方側
に突出した筒状遮蔽部１９ｃをその先端１９c′側
が先細りとなるように狭めてテーパ状に形成し而
も該遮蔽部１９ｃを上記ブツシング１の突出部１
ｄのテーパ状の内壁部１ｇの全周面に渡つて密着
させたことを特徴とするブツシング用パツキンを
用いた気中開閉器を提案するものである。B-1 Structure of the invention B-1 Means for solving the problem The present invention solves the problem of poor adhesion (attachment) of the conventional packing and prevents the above-mentioned flashover accident. A bushing 1 is inserted and fixed into the case 2, and the center conductor 3 is located on the inner side of the bushing 1 located inside the case 2.
A fixed electrode 16 is attached to the fixed electrode 1.
The slot arc-extinguishing chamber 17 is installed so as to cover the outer periphery of the bushing 1, and the opening 17 of the slot arc-extinguishing chamber 17 faces the tip 1f of the inward protrusion 1d of the bushing 1.
A bushing packing 19 is interposed between the protruding end 17b of the bushing 1 and the protruding end 17b to maintain airtightness between the two. Room 1
Annular grooves 19a and 19b are integrally formed on the front and back sides and are closely fitted to the protruding end 17b of the opening 17a of the case 2. The cylindrical shielding part 19c protruding to the side is formed into a tapered shape by narrowing the end 19c' of the shielding part 19c so that it tapers off.
This invention proposes an air switch using a bushing packing, which is characterized in that it is in close contact with the entire circumferential surface of the tapered inner wall portion 1g of d.
ロ−２ 作用
ブツシングの突出部と細隙消弧室の開口部との
間に介在して使用するゴムパツキンに、溝部を形
成しこの溝部を上記突出部の先端と開口部の突出
端に各々嵌合密着し密着性を高めるようにする。
また、一方の溝部を形成する筒状遮蔽部を同部先
端を内方へ狭めてテーパに形成しこれをブツシン
グの突出部のテーパ状の内周壁の全周面に渡つて
密着させて充電部を覆いこれによつて充電部とア
ース側であるケース間の絶縁耐力を低下させない
ようにしている。RO-2 Action A groove is formed in the rubber gasket used between the protrusion of the bushing and the opening of the narrow arc extinguishing chamber, and the groove is fitted into the tip of the protrusion and the protrusion of the opening, respectively. to improve adhesion.
In addition, the tip of the cylindrical shielding part forming one of the grooves is narrowed inward to form a taper, and this is brought into close contact with the entire circumferential surface of the tapered inner circumferential wall of the protruding part of the bushing. This prevents the dielectric strength between the live parts and the earth side of the case from decreasing.
ハ 実施例
以下、本考案の実施例を第１図乃至第５図に基
づいて説明する。C. Example Hereinafter, an example of the present invention will be described based on FIGS. 1 to 5.
１は密閉したケース２に対し相対するようにして
ケース２の側面２ａに貫装して取付けたブツシン
グであり、その中心の貫通孔１ａには中心導体３
が挿通固定されている。Reference numeral 1 denotes a bushing that is mounted through the side surface 2a of the case 2 so as to face the closed case 2, and a center conductor 3 is inserted into the through hole 1a at the center of the bushing.
is inserted and fixed.
４はブツシング１のフランジ部１ｂに固着した取
付金具であり、ブツシング１は該取付金具４の取
付穴をケース外面に立設するボルト５に差し込み
ナツト６により締付けて取付けられる。７，８は
パツキンを示す。Reference numeral 4 denotes a mounting bracket fixed to the flange portion 1b of the bushing 1, and the bushing 1 is mounted by inserting a bolt 5 into a mounting hole of the mounting bracket 4 and tightening it with a nut 6. 7 and 8 indicate patch skins.
９は芯線９ａが中心導体３の電線接続部３ａに圧
着接続されかつコーン部９ａがケース外のブツシ
ングの先端１ｃに接着された口出線、１０はブツ
シングの外周を囲むようにしてケース外面に取付
けたブツシングガード、１１はケース内方側に位
置するブツシング１の突出部１ｄの内段部１ｅに
固着されかつ上記中心導体３の第１ネジ部３ｂが
螺合されるネジ孔１１ａを備えた支持金具、１２
は支持金具１１のネジ孔１１ａより突出する中心
導体３の第２ネジ部３ｃと上記第１ネジ部３ｂと
の間の無ネジ部３ｄに対しテーパ（円錐）状の取
付穴１２ａを嵌めさらに外側からクサビ形の通電
部材１３を押し込み、そしてスプリングワツシヤ
ー１４を介してナツト１５を第２ネジ部３ｃに螺
合しこれを螺回して締付固定した導電金具であ
り、このように中心導体３に固定した該金具１２
には固定電極１６が取付けられる。１７はアーク
によのように中心導体３に固定した該金具１２に
は固定電極１６が取付けられる。１７はアークに
よつて消弧性ガスを発生するユリア、メラミン、
ジユラコン等の合成樹脂により作られた細隙消弧
室であり、その取付に際しては固定電極１６等の
充電部の外周を覆うようにして囲むと同時にその
開口部１７ａの突出端１７ｂをブツシング１の突
出部１ｄの先端１ｆに対向させるようにして固定
電極側の支持金具（特に図示しない）にネジ１８
着して取付けている。１９は耐トラツキング性、
絶縁性のEP，EPTよりなるゴムパツキンであ
り、同パツキンはブツシングの突出部１ｄの先端
１ｆに密着嵌合する環状の溝部１９ａと細隙消弧
室１７の開口部１７ａの突出端１７ｂに密着嵌合
する環状の溝部１９ｂとこれらを両溝部１９ａ，
１９ｂが逆向きになるように一体に形成するほ
か、一方の溝部１９ａを形成する筒状遮蔽部１蔽
ｃを、その先端１９c′を延長すると同時に内方へ
狭めて先端のテーパに形成しそして、取付時に同
部をブツシングの突出部１ｄのテーパ状の内周壁
１ｇの全周に渡つて密うにしたもので、同遮蔽部
１９ｃによつて密着性を高めると同時に電界集中
が起こりやすい充電部の鋭角部（例えばイ〜ニ）
の電界を緩和しそれにより充電部とアース側であ
るケース間の絶縁耐力を低下させないようにして
いる。Reference numeral 9 indicates a lead wire in which the core wire 9a is crimped to the wire connection portion 3a of the center conductor 3, and the cone portion 9a is bonded to the tip 1c of the bushing outside the case, and 10 is attached to the outer surface of the case so as to surround the outer periphery of the bushing. A bushing guard 11 is fixed to the inner step 1e of the protruding part 1d of the bushing 1 located on the inside of the case, and is a support provided with a screw hole 11a into which the first threaded part 3b of the center conductor 3 is screwed. Metal fittings, 12
The tapered (conical) mounting hole 12a is fitted into the non-threaded part 3d between the second threaded part 3c of the center conductor 3 protruding from the threaded hole 11a of the support fitting 11 and the first threaded part 3b, and then further outward. This is a conductive metal fitting in which a wedge-shaped current-carrying member 13 is pushed in, and a nut 15 is screwed into the second threaded portion 3c via a spring washer 14, and this is screwed and tightened. The metal fitting 12 fixed to
A fixed electrode 16 is attached to. A fixed electrode 16 is attached to the metal fitting 12 fixed to the center conductor 3 like an arc. 17 is urea, melamine, which generates arc-extinguishing gas by arc;
This is a slit arc extinguishing chamber made of synthetic resin such as Diuracon, and when it is installed, it is surrounded by covering the outer periphery of the live parts such as the fixed electrode 16, and at the same time, the protruding end 17b of the opening 17a is inserted into the bushing 1. Attach a screw 18 to a support fitting (not particularly shown) on the fixed electrode side so as to face the tip 1f of the protrusion 1d.
I am wearing it and installing it. 19 is tracking resistance;
This is a rubber packing made of insulating EP or EPT, and the packing is tightly fitted into an annular groove 19a that is tightly fitted to the tip 1f of the protruding portion 1d of the bushing, and to the protruding end 17b of the opening 17a of the slit arc extinguishing chamber 17. The matching annular groove 19b and both grooves 19a,
In addition to integrally forming the cylindrical shielding portion 19b so as to face in the opposite direction, the cylindrical shielding portion 1c forming one of the groove portions 19a is formed so that its tip 19c′ is extended and at the same time narrowed inward to form a tapered tip. At the time of installation, the same part is made to tightly cover the entire circumference of the tapered inner circumferential wall 1g of the protruding part 1d of the bushing, and the shielding part 19c improves adhesion and at the same time serves as a live part where electric field concentration tends to occur. acute angles (e.g. A to D)
This prevents the dielectric strength between the live part and the ground side of the case from decreasing.
２０は細隙消弧室１７の細隙部１７ｄを通過し
その先端の接触部２０ａが固定電極１６と接触す
るようにしたブレード形の可動電極であり、導電
金具２１と共に全体が略Ｓ字形に形成されており
該導電金具２１を介して可動碍子２２にネジ２３
着して取付けられている。 Reference numeral 20 denotes a blade-shaped movable electrode that passes through the narrow gap 17d of the narrow arc extinguishing chamber 17 and has a contact portion 20a at the tip thereof in contact with the fixed electrode 16. A screw 23 is attached to the movable insulator 22 through the conductive metal fitting 21.
It is attached and installed.
なお、可動碍子２２は同碍子と一体の連動軸２
４を介して図示外の操作ハンドルに連結されてお
り、同ハンドルの開閉操作によつて可動碍子２２
が回転すると動碍子と一体の可動電極２０が回転
して固定電極１６に接触したりあるいは離脱した
りして電路の開閉が行なわれる。 Note that the movable insulator 22 is connected to an interlocking shaft 2 that is integrated with the insulator.
The movable insulator 22 is connected to an operating handle (not shown) via the handle 4, and the movable insulator 22 is
When the movable insulator rotates, the movable electrode 20 integrated with the moving insulator rotates and comes into contact with or leaves the fixed electrode 16, thereby opening and closing the electric circuit.
２５は可動碍子２２並びに可動電極２０を囲む
ようにしてケース２の上下に設けた略箱形の絶縁
部材、２６はケース２にネジ２７着する内蓋取付
うにしてケース２の上下に設けた略箱形の絶縁部
材、２６はケース２にネジ２７着する内蓋取付用
の取付金具２８にネジ３４着してケースと接続す
るフレーム２９にそのアース側端子２６ａを取付
接続しさらに充電側端子２６ｂのリード線２６ｃ
を固定電極１６に接続したアレスター、３０はボ
ルト３１およびナツト３２により気密的に取付け
られたケースの蓋体２′に対しその内側に位置し
て上記アレスター２６をその上から囲むように取
付金具２８を介してケース２にネジ３３着して取
付けた内蓋であり、雷サージ等の異常電圧の侵入
によつてケースで内部閃絡が発生しそれによつて
内圧が上昇し蓋体２′が変形してパツキン３５部
において、間隙が形成され同間隙を経てケース外
へ内圧が放出されるような場合に、その内部短絡
事故によつて破壊された各部材の小片、つまり飛
散物を中央に開口部３０ａにおいて止着したパン
チングメタル等の網体３０ｂによつてスクリーン
されてケース外へ放出されないようにしている。
３６はアレスター２６と内蓋３０間に介在するよ
うにして同蓋にネジ３７着した絶縁部材よりなる
セパレータ、３８はケース２の底部内面にネジ３
９着した絶縁部材よりなるセパレータ、４０は吸
湿剤を示す。 25 is a substantially box-shaped insulating member provided on the top and bottom of the case 2 to surround the movable insulator 22 and the movable electrode 20; 26 is a substantially box-shaped insulating member provided on the top and bottom of the case 2 to attach an inner cover to the case 2 with screws 27; The shaped insulating member 26 has 27 screws attached to the case 2, 34 screws attached to the mounting bracket 28 for attaching the inner cover, and its ground side terminal 26a attached to the frame 29 connected to the case, and further connected to the charging side terminal 26b. Lead wire 26c
The arrester 30 is connected to the fixed electrode 16, and the mounting bracket 28 is located inside the lid 2' of the case, which is airtightly attached with bolts 31 and nuts 32, and surrounds the arrester 26 from above. The inner cover is attached to the case 2 by attaching 33 screws to the case 2. When abnormal voltage such as lightning surge enters the case, an internal flash fault occurs in the case, which increases the internal pressure and deforms the cover 2'. When a gap is formed in the packing 35 and internal pressure is released to the outside of the case through the gap, an opening is opened in the center to collect the small pieces of each member that were destroyed due to the internal short circuit accident, that is, the scattered objects. It is screened by a net member 30b made of punched metal or the like fixed at the portion 30a to prevent it from being released outside the case.
36 is a separator made of an insulating material that is interposed between the arrester 26 and the inner lid 30 and has a screw 37 attached to the lid;
A separator made of nine insulating members, 40 represents a moisture absorbent.
ハ 考案の効果
本考案は以上の構成からなり、
ブツシングの突出部の先端とこれに対向する細隙
消弧室の開口部の突出端との間に介在するゴムパ
ツキンには、これら突出部の先端と開口部の突出
端とに各々密着嵌合する溝部を形成しているた
め、該パツキンは不用意に外れたりせず安定した
密着状態を保持できる。C. Effects of the invention The present invention has the above-mentioned structure. Since grooves are formed that are closely fitted to the protruding end of the opening, the gasket can maintain a stable close contact without accidentally coming off.
また、上記のごとく、密着状態が確実なためブ
ツシングの突出部の先端と細隙消弧室の開口部の
突出端との間には間隙が形成されず、従来見られ
たような間隙を経て充電側の固定電極とアース側
のケースとの間で発生する閃絡（地絡）事故を防
止することができる。また同時に負荷開閉時に両
電極間で発生する導電性ガスの同間隙よりの漏洩
もないため、ブツシングの突出部の外周壁に同ガ
スが付着して起きる同部分の絶縁低下をも防止で
きる。 In addition, as mentioned above, since the close contact is ensured, no gap is formed between the tip of the protruding part of the bushing and the protruding end of the opening of the slit arc extinguishing chamber. It is possible to prevent flash faults (ground faults) that occur between the fixed electrode on the charging side and the case on the ground side. At the same time, since there is no leakage of the conductive gas generated between the two electrodes through the gap when the load is switched on and off, it is possible to prevent insulation deterioration of the protruding portion of the bushing caused by the gas adhering to the outer circumferential wall of the protruding portion of the bushing.
また、ブツシングの突出部の内周壁に密着する
ゴムパツキンの筒状遮蔽部によつてパツキンの密
着性がさらに高められると同時に、ブツシングの
突出部近傍に位置する導電金具、中心導体等の鋭
角部を持つ充電部が覆われるためにこれら充電部
の電界が緩和されて同充電部とアース側のケース
間の絶縁耐力を低下させない。 In addition, the cylindrical shielding part of the rubber packing that is in close contact with the inner circumferential wall of the protruding part of the bushing further improves the adhesion of the packing, and at the same time protects the sharp corners of conductive metal fittings, center conductors, etc. located near the protruding part of the bushing. Since the live parts held by the battery are covered, the electric field of these live parts is relaxed and the dielectric strength between the live parts and the case on the earth side is not reduced.
図面は本考案の実施例を示すもので、第１図は
気中開閉器の縦断面図、第２図はブツシング部分
の拡大縦断面図、第３図はゴムパツキンの縦断面
図、第４図はゴムパツキンの側面図、第５図は第
２図において可動碍子および可動電極を省略した
状態におけるブツシング側からみた縦断面図。
１……ブツシング、１ｄ……突出部、１ｆ……
先端、１ｇ……内周壁、２……ケース、３……中
心導体、１６……固定電極、１７……細隙消弧
室、１７ａ……開口部、１７ｂ……突出端、１９
……ゴムパツキン、１９ａ，１９ｂ……溝部、１
９ｃ……筒状遮蔽部、１９c′……先端。
The drawings show an embodiment of the present invention; Fig. 1 is a longitudinal sectional view of the air switch, Fig. 2 is an enlarged longitudinal sectional view of the bushing portion, Fig. 3 is a longitudinal sectional view of the rubber packing, and Fig. 4 is a longitudinal sectional view of the air switch. FIG. 5 is a side view of the rubber packing, and FIG. 5 is a longitudinal cross-sectional view as seen from the bushing side with the movable insulator and movable electrode omitted in FIG. 1...Butching, 1d...Protrusion, 1f...
Tip, 1g... Inner peripheral wall, 2... Case, 3... Center conductor, 16... Fixed electrode, 17... Slit arc extinguishing chamber, 17a... Opening, 17b... Projecting end, 19
...Rubber packing, 19a, 19b...Groove, 1
9c...Cylindrical shielding part, 19c'...Tip.
Claims (1)
ケース２に貫装しさらにケース２内に位置する上
記ブツシング１の内方側には上記中心導体３に対
し固定電極１６を取付けさらに該固定電極１６の
外周を覆うようにして細隙消弧室１７を取付け而
も上記ブツシング１の内方側の突出部１ｄの先端
１ｆと対向する細隙消弧室１７の開口部１７ａの
突出端１７ｂとの間にはブツシング用パツキン１
９を介在させて両者間の気密を保持するようにし
たものにおいて、上記パツキン１９は、ブツシン
グ１の突出部１ｄの先端１ｆと細隙消弧室１７の
開口部１７ａの突出端１７ｂとにそれぞれ密着嵌
合する環状の溝部１９ａ，１９ｂを表裏一体に形
成すると共にさらに最内周部に位置して上記溝部
１９ａを構成すると同時にケース２の内方側に突
出した筒状遮蔽部１９ｃをその先端１９c′側が先
細りとなるように狭めてテーパ状に形成し而も該
遮蔽部１９ｃを上記ブツシング１の突出部１ｄの
テーパ状の内壁部１ｇの全周面に渡つて密着させ
たことを特徴とするブツシング用パツキンを用い
た気中開閉器。 A bushing 1 in which the center conductor 3 is inserted and fixed is inserted into the case 2, and a fixed electrode 16 is attached to the center conductor 3 on the inner side of the bushing 1 located inside the case 2. The slit arc-extinguishing chamber 17 is installed so as to cover the outer periphery of the bushing 1. In between, there is a patchkin 1 for bushing.
9 to maintain airtightness between the two, the packing 19 is provided at the tip 1f of the protruding portion 1d of the bushing 1 and the protruding end 17b of the opening 17a of the narrow arc extinguishing chamber 17, respectively. Annular grooves 19a and 19b that fit closely together are formed integrally on the front and back, and are located at the innermost periphery to form the groove 19a, and at the same time, a cylindrical shielding portion 19c protruding inward of the case 2 is provided at its tip. The shielding part 19c is formed in a tapered shape so that the 19c' side is tapered, and the shielding part 19c is brought into close contact with the entire circumferential surface of the tapered inner wall part 1g of the protruding part 1d of the bushing 1. A pneumatic switch using a packing for bushing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986062523U JPH0439625Y2 (en) | 1986-04-24 | 1986-04-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986062523U JPH0439625Y2 (en) | 1986-04-24 | 1986-04-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62175541U JPS62175541U (en) | 1987-11-07 |
| JPH0439625Y2 true JPH0439625Y2 (en) | 1992-09-17 |
Family
ID=30896878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986062523U Expired JPH0439625Y2 (en) | 1986-04-24 | 1986-04-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0439625Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4531669B2 (en) * | 2005-09-20 | 2010-08-25 | エナジーサポート株式会社 | Switch |
-
1986
- 1986-04-24 JP JP1986062523U patent/JPH0439625Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62175541U (en) | 1987-11-07 |
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