| 摘要 |
PROBLEM TO BE SOLVED: To provide a screw thread closing device of a lock box capable of enhancing safety of a lock by closing a screw thread of the lock box. SOLUTION: The screw thread 7 is filled with a closing plate 11, locking sections 12 formed in both ends of the closing plate 11 are engaged with a screw-hole 8, also a locking plate 15 connected to the rear side of the closing plate 11 through a countersunk screw 13 is inclined with the rotation of the countersunk screw 13, and the countersunk screw 13 is fastened in such a state. COPYRIGHT: (C)2003,JPO
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