| 摘要 |
PURPOSE: A support frame for a manhole, and a locking device of a cover are provided to easily release a lock for opening and closing a cover by blocking foreign materials from outside. CONSTITUTION: A support frame for a manhole and a locking device of a cover comprise a support frame(10), a cover, and locks(30). More than one hanging projections(12) and hanging grooves(14) are formed in the support frame. Coupling bars(21) and first and second hanging projections(22,23) are formed in the cover. The locks are coupled to the coupling bars of the cover. Locking pieces, elastic parts, cutoff parts, and hanging pieces are formed in the locks. |
