JPS557354A - Manhole cover structure - Google Patents

Manhole cover structure

Info

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
Application number
JP8028678A
Other languages
Japanese (ja)
Other versions
JPS5837455B2 (en
Inventor
Michiaki Hiramoto
Kunio Murayama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Plant Technologies Ltd
Original Assignee
Hitachi Plant Technologies Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Plant Technologies Ltd filed Critical Hitachi Plant Technologies Ltd
Priority to JP53080286A priority Critical patent/JPS5837455B2/en
Publication of JPS557354A publication Critical patent/JPS557354A/en
Publication of JPS5837455B2 publication Critical patent/JPS5837455B2/en
Expired legal-status Critical Current

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
JP53080286A 1978-06-30 1978-06-30 Manhole cover structure Expired JPS5837455B2 (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (4)

* Cited by examiner, † Cited by third party
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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