| 摘要 |
PURPOSE: A locking device for a cover of a manhole is provided to prevent a cover from being separated from a support frame of a manhole, and to easily lock and unlock the manhole. CONSTITUTION: A locking device for a cover of a manhole comprises a support frame(10), a cover(20), and a lock(30). A hanging groove and a hanging protrusion are formed in the inner wall of the support frame. A coupling groove is formed in the cover. A coupling piece and a hanging piece are formed in the lock. The coupling piece is inserted into the coupling groove of the cover. |
