JPS557354A - Manhole cover structure - Google Patents
Manhole cover structureInfo
- Publication number
- JPS557354A JPS557354A JP8028678A JP8028678A JPS557354A JP S557354 A JPS557354 A JP S557354A JP 8028678 A JP8028678 A JP 8028678A JP 8028678 A JP8028678 A JP 8028678A JP S557354 A JPS557354 A JP S557354A
- Authority
- JP
- Japan
- Prior art keywords
- manhole
- stopper
- slide bar
- limit switch
- outer cover
- 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.)
- Granted
Links
Abstract
PURPOSE: To detect rapidly an opening and a closing conditions of a manhole outer cover, by combining a slide bar, a limit switch and the like.
CONSTITUTION: A guide pipe 10 is piercedly secured at the circumference of a part where an inner cover is located at an inner cover support 4 of a manhole frame 3. A slide bar 20, which is equipped with a head 2 being in contact with a bottom surface of an outer cover at a upper end, a spring 35 at a middle part, and a stopper 24 at a lower end are slidably inserted in the guide pipe 10 through an O-shaped ring, and a limit switch 40 with a detecting arm, which is hooked at a stopper 24, is located at a manhole proper 1 through the medium of a bracket 30. And thus, when an outer cover 7 is removed from the manhole frame 3, the slide bar 20 rises up due to the spring force of a spring 35, and as a result the detecting arm 41 being pressed down by means of the stopper 24 is rleased. Then the output of the limit switch 40 is changed over to OFF from ON, and thus, an alarming device works.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53080286A JPS5837455B2 (en) | 1978-06-30 | 1978-06-30 | Manhole cover structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53080286A JPS5837455B2 (en) | 1978-06-30 | 1978-06-30 | Manhole cover structure |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS557354A true JPS557354A (en) | 1980-01-19 |
JPS5837455B2 JPS5837455B2 (en) | 1983-08-16 |
Family
ID=13714021
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53080286A Expired JPS5837455B2 (en) | 1978-06-30 | 1978-06-30 | Manhole cover structure |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5837455B2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103646493A (en) * | 2013-12-22 | 2014-03-19 | 魏玉芳 | Road well lid safety monitoring system |
CN104480967A (en) * | 2014-10-28 | 2015-04-01 | 国家电网公司 | Stealing warning device of electrical well cover |
CN105297775A (en) * | 2015-09-10 | 2016-02-03 | 成都易信达科技股份有限公司 | Well lid antitheft monitoring method |
CN105862925A (en) * | 2016-06-12 | 2016-08-17 | 苏州莲敬机械工程科技有限公司 | Inspection well opening warning device |
-
1978
- 1978-06-30 JP JP53080286A patent/JPS5837455B2/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103646493A (en) * | 2013-12-22 | 2014-03-19 | 魏玉芳 | Road well lid safety monitoring system |
CN104480967A (en) * | 2014-10-28 | 2015-04-01 | 国家电网公司 | Stealing warning device of electrical well cover |
CN105297775A (en) * | 2015-09-10 | 2016-02-03 | 成都易信达科技股份有限公司 | Well lid antitheft monitoring method |
CN105862925A (en) * | 2016-06-12 | 2016-08-17 | 苏州莲敬机械工程科技有限公司 | Inspection well opening warning device |
Also Published As
Publication number | Publication date |
---|---|
JPS5837455B2 (en) | 1983-08-16 |
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