JPS642340Y2 - - Google Patents
Info
- Publication number
- JPS642340Y2 JPS642340Y2 JP13701582U JP13701582U JPS642340Y2 JP S642340 Y2 JPS642340 Y2 JP S642340Y2 JP 13701582 U JP13701582 U JP 13701582U JP 13701582 U JP13701582 U JP 13701582U JP S642340 Y2 JPS642340 Y2 JP S642340Y2
- Authority
- JP
- Japan
- Prior art keywords
- seal
- operating shaft
- guide tube
- tightening
- switch
- 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
- 238000007789 sealing Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
Landscapes
- Mechanisms For Operating Contacts (AREA)
- Switch Cases, Indication, And Locking (AREA)
Description
【考案の詳細な説明】
この考案はリミツトスイツチにおけるシール構
造に関する。[Detailed description of the invention] This invention relates to a seal structure in a limit switch.
従来この種のリミツトスイツチは第1図および
第2図に示すようにシール6を収容する溝5がそ
の断面において単純なく形をしているために、シ
ール6の寸法のばらつきあるいは溝5の加工にお
けるばらつきにより、シール6の締め代がスイツ
チの動作とくに操作軸4の動きに与える影響はひ
じように大きい。すなわちシール6の締付け力が
大きすぎると操作軸4の動きが重くなり、復帰遅
れ等の動作不良の原因となるおそれがあり、また
逆にシール6の締付け力が少なければシール性能
が低下する欠点があつた。 Conventionally, in this type of limit switch, as shown in FIGS. 1 and 2, the groove 5 for accommodating the seal 6 has a simple shape in its cross section, so there may be variations in the dimensions of the seal 6 or in the machining of the groove 5. Due to variations, the influence of the tightness of the seal 6 on the operation of the switch, particularly on the movement of the operating shaft 4, is as large as an elbow. In other words, if the tightening force of the seal 6 is too large, the movement of the operating shaft 4 will become heavy, which may cause malfunctions such as delayed return, and conversely, if the tightening force of the seal 6 is too small, the sealing performance will deteriorate. It was hot.
この考案はこのような従来の欠点を解消しよう
とするもので、以下図によつてこの考案の一実施
例を説明する。 This invention is an attempt to eliminate such conventional drawbacks, and one embodiment of this invention will be described below with reference to the drawings.
すなわち第3図において内蔵スイツチ(図に示
してない)を収容するハウジング1の一端すなわ
ちその上端にはヘツド部2が取付けられ、このヘ
ツド部には案内筒3が形成され、この案内筒3に
はたとえば外部プランジヤーからなる操作軸4が
その軸心方向に沿つて滑動自在に支持されてい
る。操作軸4の外周において案内筒3の内周壁に
は凹溝5が設けられ、この凹溝内には環状のシー
ル6が収容されている。そしてこのシール6の操
作軸4と接触する面に球面状の突部7が形成さ
れ、操作軸4と案内筒3との間のシールを司つて
いる。さらにシール6の凹溝5の底部と接する面
にはシール6の操作軸4に対する締付け過ぎを吸
収する締付け過ぎ吸収凹所8が形成されている。
これによつてシール6の操作軸4に対する必要以
上の締付け力はシール6の変形に伴う凹所8の体
積の減少によつて逃がされ、したがつてシール6
の操作軸4に対する締付け力は適切な量となる。
すなわち操作軸4はシール6に対して滑動自在に
接触し、かつ案内筒3に対するシール性が確保さ
れる。 That is, in FIG. 3, a head portion 2 is attached to one end, that is, the upper end, of a housing 1 that accommodates a built-in switch (not shown), and a guide tube 3 is formed in this head portion. An operating shaft 4 consisting of, for example, an external plunger is slidably supported along its axial direction. A groove 5 is provided on the inner peripheral wall of the guide cylinder 3 on the outer periphery of the operating shaft 4, and an annular seal 6 is accommodated in the groove. A spherical protrusion 7 is formed on the surface of the seal 6 that contacts the operating shaft 4, and serves as a seal between the operating shaft 4 and the guide tube 3. Furthermore, an over-tightening absorbing recess 8 is formed in the surface of the seal 6 that contacts the bottom of the concave groove 5 to absorb over-tightening of the seal 6 with respect to the operating shaft 4.
As a result, the excessive tightening force of the seal 6 against the operating shaft 4 is released by the reduction in the volume of the recess 8 due to the deformation of the seal 6, and therefore the seal 6
The tightening force on the operating shaft 4 will be an appropriate amount.
That is, the operating shaft 4 is slidably in contact with the seal 6, and the sealing performance with respect to the guide tube 3 is ensured.
また第4図はこの考案の他の実施例を示すもの
で、ローラーレバータイプのリミツトスイツチで
ある。このスイツチにおいては凹溝5は回転軸か
らなる操作軸4に設けられている。 FIG. 4 shows another embodiment of this invention, which is a roller lever type limit switch. In this switch, the groove 5 is provided on the operating shaft 4, which is a rotating shaft.
なお符号9はカツププランジヤー、10は復帰
スプリングである。 Note that 9 is a cup plunger and 10 is a return spring.
第5図は案内筒3の凹溝5にシール6を収容し
た状態を示し、操作軸4はまだ挿入されていな
い。したがつてシール6の突部7は案内筒3の内
周面から突出している。この状態で操作軸4を第
6図に示すように案内筒3に挿入すると突部7は
操作軸4の外周に弾力的に当接するとともに、シ
ール6の突部7と反対側の面は操作軸4の締付け
により、余剰締付け量の分だけ凹所8が凹溝5と
の間において縮少されるようにシール6は変形す
る。これによつてシール6の操作軸4に対する必
要以上の締付け力が吸収される。したがつて凹所
8の体積は操作軸4の動作時の変動たとえばその
偏心量にも追随し、つねに操作軸4のシール6に
対する摩擦力をほぼ一定に維持する。またシール
6に形成される凹所8は、第7図のようにコ字形
のものでもよい。 FIG. 5 shows a state in which the seal 6 is accommodated in the groove 5 of the guide tube 3, and the operating shaft 4 has not yet been inserted. Therefore, the protrusion 7 of the seal 6 protrudes from the inner peripheral surface of the guide cylinder 3. In this state, when the operating shaft 4 is inserted into the guide tube 3 as shown in FIG. By tightening the shaft 4, the seal 6 is deformed so that the recess 8 is reduced between it and the groove 5 by the amount of excess tightening. This absorbs the excessive tightening force of the seal 6 against the operating shaft 4. Therefore, the volume of the recess 8 follows fluctuations during operation of the operating shaft 4, such as its eccentricity, and always maintains the frictional force of the operating shaft 4 against the seal 6 almost constant. Further, the recess 8 formed in the seal 6 may be U-shaped as shown in FIG.
この考案は上述のように案内筒3と操作軸4と
の間において案内筒3または操作軸4にシール6
を収容するための凹溝5を設けるとともにシール
6の凹溝5の底部と対向する面にシール6の操作
軸4に対する締付け過ぎを吸収する締付け過ぎ吸
収凹所8を形成しているので、シール6の操作軸
4に対する締付け力が必要以上に大きいばあいに
は凹所8により吸収し、シール6の操作軸4に対
する締付け力を適切な値に、かつ一定に維持する
ことができ、したがつて十分なシール性能ととも
に操作軸4の滑らかな動きを確保することができ
る利点がある。 As described above, this device has a seal 6 on the guide tube 3 or the operation shaft 4 between the guide tube 3 and the operation shaft 4.
In addition, an over-tightening absorption recess 8 is formed on the surface of the seal 6 facing the bottom of the recessed groove 5 to absorb over-tightening of the seal 6 against the operating shaft 4. If the tightening force of the seal 6 to the operating shaft 4 is larger than necessary, it can be absorbed by the recess 8, and the tightening force of the seal 6 to the operating shaft 4 can be maintained at an appropriate value and constant. This has the advantage of ensuring sufficient sealing performance and smooth movement of the operating shaft 4.
第1図および第2図は従来のリミツトスイツチ
を示す側断面図、第3図はこの考案におけるリミ
ツトスイツチの側断面図、第4図はこの考案の他
の実施例を示す側断面図、第5図および第6図は
要部の拡大側断面図、第7図はさらに他の実施例
におけるシールの横断面図である。
1……ハウジング、2……ヘツド部、3……案
内筒、4……操作軸、5……凹溝、6……シー
ル、7……突部、8……締付け過ぎ吸収凹所、9
……カツププランジヤー、10……復帰スプリン
グ。
1 and 2 are side sectional views showing a conventional limit switch, FIG. 3 is a side sectional view of the limit switch according to this invention, FIG. 4 is a side sectional view showing another embodiment of this invention, and FIG. 5 is a side sectional view showing a conventional limit switch. 6 is an enlarged side sectional view of the main part, and FIG. 7 is a cross sectional view of a seal in still another embodiment. DESCRIPTION OF SYMBOLS 1... Housing, 2... Head part, 3... Guide tube, 4... Operating shaft, 5... Concave groove, 6... Seal, 7... Projection, 8... Over-tightening absorption recess, 9
...Cup plunger, 10...Return spring.
Claims (1)
3を設け、この案内筒に上記内蔵スイツチを操作
する操作軸4を滑動自在に支持し、さらに上記案
内筒3と上記操作軸4との間において上記案内筒
3または上記操作軸4にシール6を収容するため
の凹溝5を設けるとともに上記シール6の上記凹
溝5底部と対向する面に上記シール6の上記操作
軸4に対する締付け過ぎを吸収する締付け過ぎ吸
収凹所8を形成し、この凹所により上記操作軸4
の滑動を一定に維持するようにしたリミツトスイ
ツチ。 A guide tube 3 is provided in the housing 1 that accommodates the built-in switch, and an operating shaft 4 for operating the built-in switch is slidably supported on the guide tube. A concave groove 5 for accommodating the seal 6 is provided in the tube 3 or the operating shaft 4, and a tightening mechanism is provided on the surface of the seal 6 facing the bottom of the concave groove 5 to absorb excessive tightening of the seal 6 against the operating shaft 4. A pass absorbing recess 8 is formed, and the operating shaft 4 is
A limit switch that maintains constant sliding.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13701582U JPS5941929U (en) | 1982-09-09 | 1982-09-09 | limit switch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13701582U JPS5941929U (en) | 1982-09-09 | 1982-09-09 | limit switch |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5941929U JPS5941929U (en) | 1984-03-17 |
JPS642340Y2 true JPS642340Y2 (en) | 1989-01-19 |
Family
ID=30307884
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13701582U Granted JPS5941929U (en) | 1982-09-09 | 1982-09-09 | limit switch |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5941929U (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010033014A1 (en) * | 2010-07-31 | 2012-02-02 | Kissling Elektrotechnik Gmbh | Electronic plunger switch |
-
1982
- 1982-09-09 JP JP13701582U patent/JPS5941929U/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS5941929U (en) | 1984-03-17 |
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