LOCKING DEVICE OF MANHOLE COVER

摘要

PROBLEM TO BE SOLVED: To provide the locking device of a manhole cover capable of unlocking the manhole cover without using a key, dispensing with the carrying and management of a key bundle and securing the maintenance of the facility of the manhole inside. SOLUTION: The lever shaft 4 of a dial lock provided integrally on the manhole cover 1 is engaged with an engaging member 7 provided on a cover receiving frame 2 to lock the manhole cover 1 on the cover receiving frame 2.