Patent ID: 11891840
Assignee: FANUC CORPORATION
Field: Civil engineering (Other fields)
Classification: CPC E  F | IPC E

Claim 5:
6. A safety door locking method which uses a safety door device including a closing detector configured to detect that a safety door has moved to a closed state from an opened state, and a locking mechanism configured to lock the safety door so that the safety door does not move to the open state from the closed state, the safety door locking method comprising the steps of:
measuring a travel acceleration of the safety door, a travel speed of the safety door, or a travel time of the safety door when the safety door is moved from the open state to the closed state; and
controlling the locking mechanism to lock the safety door when the safety door is detected to be in the closed state, and not to lock the safety door if the travel acceleration of the safety door or the travel speed of the safety door is greater than a first threshold, or if the travel time of the safety door is shorter than a second threshold.