JPS56115425A - Locking device for manhole - Google Patents

Locking device for manhole

Info

Publication number
JPS56115425A
JPS56115425A JP1877980A JP1877980A JPS56115425A JP S56115425 A JPS56115425 A JP S56115425A JP 1877980 A JP1877980 A JP 1877980A JP 1877980 A JP1877980 A JP 1877980A JP S56115425 A JPS56115425 A JP S56115425A
Authority
JP
Japan
Prior art keywords
key
lock
face
hole
lowered
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
JP1877980A
Other languages
Japanese (ja)
Other versions
JPS5747343B2 (en
Inventor
Koichi Kuratani
Koji Imamura
Garo Iijima
Yasuo Negishi
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.)
Nippon Telegraph and Telephone Corp
Sumitomo Electric Industries Ltd
Original Assignee
Nippon Telegraph and Telephone Corp
Sumitomo Electric Industries 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 Nippon Telegraph and Telephone Corp, Sumitomo Electric Industries Ltd filed Critical Nippon Telegraph and Telephone Corp
Priority to JP1877980A priority Critical patent/JPS56115425A/en
Publication of JPS56115425A publication Critical patent/JPS56115425A/en
Publication of JPS5747343B2 publication Critical patent/JPS5747343B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)

Abstract

PURPOSE: To accomplish a locking with ease and a high reliability by unlocking or locking in the combination of actions of a key, raising, lowering and rotation, with the key inserted into a key hole having a pinhole and a projection extended at the right angle at the tip of a rotating shaft.
CONSTITUTION: A key 1 having projections 1a and 1b extended at the right angle and a center hole 1e is constructed with a handle 2. When a lock 3 is released with the key 1 or the locking shafts are withdrawn by turning a rotary hardware 4, first, the key 1 is inserted into a key hole 3a of the lock 3, lowered and turned by 90° when reaching the face B of the lock. When coinciding a key hole 3b, the key 1 is lowered to the face C of the lock, turned by 90° and raised through the key hole 3b. Then, after reaching the face B of the lock, the key 1 is turned by 90° and lowered through the key hole 3b and turned by 90° when reaching the face C of the lock. Thereafter, the key 1 is lowered through the key hole 3C and engaged with the face D of a rotary hardware 4.
COPYRIGHT: (C)1981,JPO&Japio
JP1877980A 1980-02-18 1980-02-18 Locking device for manhole Granted JPS56115425A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1877980A JPS56115425A (en) 1980-02-18 1980-02-18 Locking device for manhole

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1877980A JPS56115425A (en) 1980-02-18 1980-02-18 Locking device for manhole

Publications (2)

Publication Number Publication Date
JPS56115425A true JPS56115425A (en) 1981-09-10
JPS5747343B2 JPS5747343B2 (en) 1982-10-08

Family

ID=11981112

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1877980A Granted JPS56115425A (en) 1980-02-18 1980-02-18 Locking device for manhole

Country Status (1)

Country Link
JP (1) JPS56115425A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60219043A (en) * 1984-04-14 1985-11-01 中山　紘一 Heat-insulating material by flame spray coated film
JPS61146147U (en) * 1985-03-01 1986-09-09
JPS62149962U (en) * 1986-03-18 1987-09-22
JP6762604B2 (en) 2016-06-13 2020-09-30 国立研究開発法人宇宙航空研究開発機構 Wings and aircraft
JP7038404B2 (en) 2017-12-12 2022-03-18 国立研究開発法人宇宙航空研究開発機構 Transonic airfoils, wings and aircraft

Also Published As

Publication number Publication date
JPS5747343B2 (en) 1982-10-08

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