SHUTTER WINDING STRUCTURE

摘要

A shutter winding structure capable of winding up and down a shutter with a simple structure and detecting the inclusion of an obstacle into a shutter body; the shutter (A), comprising a mechanism part having the shutter body (1) and a drum (2), a drive part (4) having a stepping motor (3) and transmitting the rotation of the stepping motor (3) to the drum (2), a power supply part (10), a power detection part (11) for detecting a current, an operating part (12) having operation buttons (12a to 12c), and a control part (13) having a storage part (13a) for storing the number of driving pulses to the stepping motor (3) between a wind up limit and a wind down limit provided when the stepping motor is stopped after rotated by a specified angle by controlling the control part so as to rotate the stepping motor (3) in one direction and, when the power detection part (11) detects a current larger than a set current and judges to reach the winding up limit or winding down limit, to stop the rotation of the stepping motor (3), and then to rotate the motor by a specified angle in the direction opposite to the rotating direction of the motor.