| 摘要 |
PROBLEM TO BE SOLVED: To provide a lid locking structure for underground structure and a lid for underground structure having the locking structure capable of easily controlling the breaking strength broken by an internal pressure generated in the underground structure, and in which even when broken, members constituting the locking structure can be reused.SOLUTION: The lid locking structure for underground structure, includes: a lid body 20; a lock 50 which is swingably attached to the lower face of the lid body 20; and a receiving frame 10 for supporting the lid body 20 which is arranged to be locked with the lock 50 in the inner periphery thereof. An engaging member (engagement pin 52) which is engaged with a lock seat 11 formed in the inner periphery of the receiving frame 10 is detachably fixed to an engaging member fixing part (pin mounting part 51c) of a lock body 51.SELECTED DRAWING: Figure 2 |
