Safety door device and safety door locking method
AssigneeFanuc Corporation
InventorKeita Asano
Life of this patent
Estimating the term…
Abstract
A safety door device according to an aspect includes: a full closing detector for detecting that a safety door has fully closed from an opened state; a locking mechanism for locking the safety door so that the safety door does not open; a measurement unit (acceleration sensor, control unit for measuring a travel acceleration, a travel speed, or a travel time when the safety door closes; and a control unit for controlling the locking mechanism to lock the safety door when the safety door is detected to be fully closed. If the travel acceleration or the travel speed is greater than a first threshold, or if the travel time is shorter than a second threshold, then the control unit does not cause the safety door to be locked.
Claims10
A safety door device comprising:
- a closing detector configured to detect that a safety door has moved to a closed state from an opened state;
- 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;
- a measurement unit configured to measure 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
- a control unit configured to, when the safety door is detected to be in the closed state, control the locking mechanism to lock the safety door, the control unit being further configured not to cause the safety door to be locked 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.
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.
Dependencies are inferred from the claim text.