| 摘要 |
PROBLEM TO BE SOLVED: To provide a cylinder insertion hole blocking device for a door which prevents unauthentic unlocking by inserting a wire into a cylinder insertion hole opened to the outside of the door. SOLUTION: A protector ring 12 is fitted to the cylinder insertion hole from the outside of the door, and the protector ring 12 is prevented from slipping out of the insertion hole. The outer periphery of a cylinder 2 is sheathed with a liner cylinder 13 which is further sheathed with at least one adjusting liner 15 and a ring liner 17. The adjusting liner 15 is formed like a thin annular washer, and has an outer diameter almost the same as the opening rim of a decorating ring. The ring liner 17 has an annular bead portion 16 formed on the periphery thereof to house the adjusting liner 15 in the same. COPYRIGHT: (C)2004,JPO
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