JPH0211689Y2 - - Google Patents
Info
- Publication number
- JPH0211689Y2 JPH0211689Y2 JP1984154357U JP15435784U JPH0211689Y2 JP H0211689 Y2 JPH0211689 Y2 JP H0211689Y2 JP 1984154357 U JP1984154357 U JP 1984154357U JP 15435784 U JP15435784 U JP 15435784U JP H0211689 Y2 JPH0211689 Y2 JP H0211689Y2
- Authority
- JP
- Japan
- Prior art keywords
- housing
- switch
- opening
- cover
- head
- 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
Landscapes
- Switch Cases, Indication, And Locking (AREA)
Description
【考案の詳細な説明】
「対象技術分野」
この考案は爆発のおそれがある危険場所で使わ
れるリミツトスイツチに関する。[Detailed description of the invention] "Target technical field" This invention relates to limit switches used in hazardous locations where there is a risk of explosion.
「従来装置およびその欠点」
従来炭鉱等、危険場所で使われるリミツトスイ
ツチの塗装色は汚れ等が目立たないよに青色や無
彩色が用いられ、まれに黄色が用いられている。
しかもその塗装色はリミツトスイツチの形状、定
格、用途にかかわらず一般に統一されているた
め、とくにその用途はスイツチを見ただけでは分
り難い。すなわちそのスイツチが取扱上からみて
重要なスイツチか、危険場所で使つてもよいの
か、位置決め用か、あるいは保安用のエンドセン
サーか見分けがつき難い。このため使用者はその
スイツチの重要さに対して無関心になり易い。し
たがつて一般のリミツトスイツチと同様に不注意
に扱い、大きな事故を引起すおそれが多分にあ
る。``Conventional Equipment and Its Disadvantages'' Conventionally, limit switches used in hazardous areas such as coal mines are painted in blue or achromatic colors to make dirt less noticeable, and in rare cases yellow is used.
Furthermore, because the paint color is generally the same regardless of the shape, rating, or purpose of the limit switch, it is difficult to determine its purpose just by looking at the switch. In other words, it is difficult to tell whether the switch is important from the point of view of handling, whether it can be used in a hazardous area, whether it is for positioning, or whether it is an end sensor for security purposes. Therefore, users tend to become indifferent to the importance of the switch. Therefore, like any other limit switch, there is a high risk of causing a serious accident if handled carelessly.
「目的」
この考案はとくに危険場所で使用される封入形
リミツトスイツチの塗装色を一般の封入形リミツ
トスイツチの塗装色と区別することにより、その
重要性を明確にするとともに、取扱いを容易にし
ようとするものである。``Purpose'' This invention aims to clarify the importance of enclosed limit switches used in hazardous areas and to make them easier to handle by distinguishing the coating color from that of general enclosed limit switches. It is something.
「実施例」
第１図および第２図においてハウジング１内に
は内蔵スイツチ２が収容され、またハウジング１
には円形の開口部１４が形成され、この開口部に
は環状のパツキン３を介して円板状のカバー４が
嵌合されている。ハウジング１の頭部にはヘツド
５が取付けられ、このヘツドには軸６が回転自在
に支持され、その中間部にはカム７が取付けられ
ている。このカムはボール８を介して操作杆９の
一端と接触し、この操作杆の他端は内蔵スイツチ
２のプランジヤー１０と衝合している。さらにヘ
ツド５とハウジング１との間にはダイヤフラムシ
ール１１が設けられ、このシールは操作杆９と一
体にされている。なお軸６の外端部にはレバー１
２が取付けられる。"Embodiment" In FIGS. 1 and 2, a built-in switch 2 is housed in the housing 1, and the housing 1
A circular opening 14 is formed in the opening 14, and a disc-shaped cover 4 is fitted into this opening via an annular packing 3. A head 5 is attached to the top of the housing 1, a shaft 6 is rotatably supported on the head, and a cam 7 is attached to the intermediate portion thereof. This cam contacts one end of the operating rod 9 via the ball 8, and the other end of this operating rod abuts against the plunger 10 of the built-in switch 2. Furthermore, a diaphragm seal 11 is provided between the head 5 and the housing 1, and this seal is integrated with the operating rod 9. Note that there is a lever 1 on the outer end of the shaft 6.
2 is installed.
そしてハウジング１、カバー４およびヘツド５
の外周面には赤色の塗装が施され、これによつこ
の封入形リミツトスイツチは危険場所で用いられ
る本質安全防爆用のスイツチであることが認識さ
れる。 and housing 1, cover 4 and head 5
The outer circumferential surface of the switch is painted red, thereby identifying this enclosed limit switch as an intrinsically safe explosion-proof switch used in hazardous locations.
「効果」
この考案は上述のようにハウジング１に円形の
開口部１４を設け、この開口部を環状のパツキン
３を介して円板状のカバー４により覆つているの
で、矩形の開口部、枠形のパツキンおよび角形の
カバーを有するものに比し、シール性が高く、し
かも圧力に対して強く、したがつて防爆用として
きわめて良好であるばかりでなく、ハウジング１
およびその開口部１４を覆うカバー４に赤色の塗
装を施しているので、一般のリミツトスイツチか
ら容易に判別することができ、本質安全の上から
とくに効果がある。"Effects" As described above, this invention provides a circular opening 14 in the housing 1, and this opening is covered with a disc-shaped cover 4 via an annular packing 3. Compared to those with shaped gaskets and rectangular covers, the housing 1
Since the cover 4 covering the opening 14 is painted red, it can be easily distinguished from a general limit switch, and is particularly effective in terms of essential safety.
第１図はこの考案における封入形リミツトスイ
ツチのカバーを一部切欠いて示す正面図、第２図
はレバーを取外して示す側断面図である。
１……ハウジング、２……内蔵スイツチ、３…
…パツキン、４……カバー、５……ヘツド、６…
…軸、７……カム、８……ボール、９……操作
杆、１０……プランジヤー、１１……ダイヤフラ
ムシール、１２……レバー、１４……開口部。
FIG. 1 is a front view with the cover of the enclosed limit switch according to the invention partially cut away, and FIG. 2 is a side sectional view with the lever removed. 1...Housing, 2...Built-in switch, 3...
...Putskin, 4...Cover, 5...Head, 6...
... shaft, 7 ... cam, 8 ... ball, 9 ... operating rod, 10 ... plunger, 11 ... diaphragm seal, 12 ... lever, 14 ... opening.
Claims (1)
ともに、上記ハウジング１の頭部にヘツド５を取
付け、一方上記ハウジング１には円形の開口部１
４を設け、かつこの開口部を環状のパツキン３を
介して円板状のカバー４により覆い、かつこのカ
バーおよび上記ハウジング１には非危険場所で使
用されるものと区別する赤色の塗装を施した本質
安全防爆用封入形リミツトスイツチ。 A built-in switch 2 is housed in the housing 1, and a head 5 is attached to the top of the housing 1, while the housing 1 has a circular opening 1.
4, and this opening is covered with a disc-shaped cover 4 via an annular packing 3, and this cover and the housing 1 are painted red to distinguish them from those used in non-hazardous areas. An intrinsically safe explosion-proof enclosed limit switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984154357U JPH0211689Y2 (en) | 1984-10-15 | 1984-10-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984154357U JPH0211689Y2 (en) | 1984-10-15 | 1984-10-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6170323U JPS6170323U (en) | 1986-05-14 |
| JPH0211689Y2 true JPH0211689Y2 (en) | 1990-03-28 |
Family
ID=30712355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1984154357U Expired JPH0211689Y2 (en) | 1984-10-15 | 1984-10-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0211689Y2 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5034073U (en) * | 1973-07-25 | 1975-04-12 | ||
| JPS5331164U (en) * | 1976-08-24 | 1978-03-17 | ||
| US4168411A (en) * | 1977-08-08 | 1979-09-18 | Trw Inc. | Closure switch for a compartment |
-
1984
- 1984-10-15 JP JP1984154357U patent/JPH0211689Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6170323U (en) | 1986-05-14 |
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