| 摘要 |
PURPOSE:To prevent lengthening of a positioning control mechanism for a screen by continuously providing, on a screen winding device, the plural number of steps of planetary gear mechanisms coupled with regular/reverse output of a winding shaft and controlling only a rotary mechanism in circumferential direction. CONSTITUTION:A winding device 1 of a roll blind is formed by a winding shaft 2, its driving part 3, reduction gear part 4, the first self-locking part 5, the second self-locking part 6, a manual winding part 7 and a positioning mechanism part 8 for a blind. Operation of this winding device is such that output of a motor is decelerated to a predetermined speed of rotation by regular or reverse operation of a regular/reverse motor 24 through the first-the fourth planetary gear reduction mechanism 29-32, and a force of said rotation is conducted to the winding shaft 2 to wind or unfold a blind. When the blind reaches a predetermined set position, the positioning mechanism part 8 operates to complete elevation/lowering operation of the blind. Further, when manual operation is required, a rope P is pulled to regularly or reversely turn a pulley 59 to use it for winding or unfolding the blind. |
