Patent ID: 11970896
Assignee: ALPS ALPINE CO., LTD.
Field: Civil engineering (Other fields)
Classification: CPC E  B | IPC A  B  E

Claim 6:
7. An opening/closing control method for controlling an opening/closing operation of an opening/closing body driven by a motor, the opening/closing control method comprising:
detecting a position of the opening/closing body based on rotation of the motor;
calculating a load of the opening/closing body in the opening/closing operation based on a current flowing to the motor;
setting a pinch threshold value that defines an upper limit of the calculated load;
determining that an object is pinched by the opening/closing body in a case where the calculated load exceeds the upper limit defined by the pinch threshold value; and
performing a pinch prevention control process in response to determining that the object is pinched, the pinch prevention control process reversing the rotation of the motor,
wherein the setting of the pinch threshold value includes calculating a speed of the opening/closing body based on a change in the detected position of the opening/closing body, and decreasing the pinch threshold value in a case where a state, in which the calculated speed of the opening/closing body is less than or equal to a first predetermined threshold value, and a temporal change in the calculated load is greater than or equal to a second predetermined threshold value and less than or equal to a third predetermined threshold value, continues for a certain period of time or greater.