| 摘要 |
PROBLEM TO BE SOLVED: To prevent an entering person in a controlled area from staying alone so as to prevent unauthorized removal of a valuable from the controller area or unauthorized operation inside the controlled area. SOLUTION: This entrance control system is arranged outside a controlled area and provided with a first operation unit 1 outputting first operator data or second operator data in response to the operation of an operator, an electric lock 3 installed in an entrance door to the controlled area, and a controller 5 previously storing the operator data as reference data for unlocking the electric lock 3 on the basis of the operator data inputted from the first operation unit 1 and the reference data. The controller 5 is provided with an entering person number storage unit 55 storing the number of entering person inside the controlled area and unlocks the electric lock 3 only when two persons enter the controlled area if no one is inside the controlled area. |
