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

Claim 0:
1. An opening/closing control device for controlling an opening/closing operation of an opening/closing body driven by a motor, the opening/closing control device comprising:
a current detector configured to detect a current flowing to the motor;
a voltage detector configured to detect a voltage supplied to the motor;
a processor; and
a memory storing program instructions that cause the processor to:
detect a position of the opening/closing body based on rotation of the motor;
calculate a load of the opening/closing body in the opening/closing operation based on the current detected by the current detector;
set a pinch threshold value that defines an upper limit of the calculated load;
determine 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
perform 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 processor calculates a speed of the opening/closing body based on a change in the detected position of the opening/closing body, and decreases 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.