| 摘要 |
PURPOSE: A lamp rise and fall controlling system for mounting on ceiling is provided to eliminate high place work on the maintenance and change of lamps mounted on ceiling. CONSTITUTION: A lamp rise and fall controlling system for mounting on ceiling comprises a motor casing(10), a winch(16), a ballast box(40), many rollers(50), a wire winder(44), many lamps(54) and a controlling box. The motor casing(10) is mounted on the ceiling of a building and has many limit switches(20) on the bottom thereof. The winch(16) is mounted in the motor casing(10) with being supported by bearings by supporting structures(18) and actuated with a deceleration motor(M) mounted in the motor casing(10). The ballast box(40) is displaced beneath the motor casing(10) and mounts many ballasts(42) therein. The rollers(50) are displaced in the ballast box(40) in inverse trigonometric type to ascend and descend the ballast box(40) by inducing a wire(W) provided to the winch(16). The wire winder(44) is displaced on inner side of the rollers(50) in the box(40). Each of the lamps(54) is supported by a wire pipe(52) under the box(40). The controlling box is electrically connected to the deceleration motor(M), a wire winded on the wire winder(44), the limit switches(20), the ballasts(42) and the lamps(54). Therefore, a high place work on the maintenance and change of lamps mounted on ceiling can be converted to a ground work. |
