| 摘要 |
PURPOSE: An automatic shutter locker is provided to automatically lock a shutter once an operator lets the shutter off after pulling down the shutter and to open the shutter only by an operating lever. CONSTITUTION: A locker is rotated clockwise since a shutter(2) is fixed to a locking wheel(10) while the shutter is pulled down. Then a hanging groove(12) of the locking wheel sequentially pushes the slant of a hanger(23) to smoothly pull down the shutter. Once an operator lets the shutter off, the shutter is locked by hanging the hanger on the groove for the prevention of a reverse rotation. To open the shutter, an operating lever is pulled to separate the locking wheel from the hanging groove and the locking state of the shutter is released.
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