| 摘要 |
PURPOSE:To read an ID number without fail even under a bad environment by detecting a trigger hole, an address hole and an ID number hole, which are provided in the bottom of a safe, by a proximity sensor to be arranged in a direction, which is orthogonal to the inserting direction of the safe, and reading the ID number of the safe. CONSTITUTION:Since the proximity sensors 31a-31f detect trigger holes 28..., the trigger hole 28 is recognized as the reading reference point of address holes 29... and ID number holes 30... to be arranged in the direction which is orthogonal with the inserting direction of a safe 26. The addresses of the address holes 29... are read by the proximity sensors 31b-31d and the ID number data of the ID number holes 30... are read by the proximity sensors 31e and 31f. Thus, even when the safe is handled a little carelessly or even under the bad environment such as dust and dirt, etc., the ID number can be read without fail. |
